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| author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
|---|---|---|
| committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
| commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
| tree | 10027f336435511475e392454359edea8e25895d /netwerk/sctp/src/netinet/sctp_output.c | |
| parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
| download | UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.gz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.lz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.xz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.zip | |
Add m-esr52 at 52.6.0
Diffstat (limited to 'netwerk/sctp/src/netinet/sctp_output.c')
| -rwxr-xr-x | netwerk/sctp/src/netinet/sctp_output.c | 14561 |
1 files changed, 14561 insertions, 0 deletions
diff --git a/netwerk/sctp/src/netinet/sctp_output.c b/netwerk/sctp/src/netinet/sctp_output.c new file mode 100755 index 000000000..49447fa9d --- /dev/null +++ b/netwerk/sctp/src/netinet/sctp_output.c @@ -0,0 +1,14561 @@ +/*- + * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. + * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. + * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * a) Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * b) Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the distribution. + * + * c) Neither the name of Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifdef __FreeBSD__ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD: head/sys/netinet/sctp_output.c 280371 2015-03-23 15:12:02Z tuexen $"); +#endif + +#include <netinet/sctp_os.h> +#ifdef __FreeBSD__ +#include <sys/proc.h> +#endif +#include <netinet/sctp_var.h> +#include <netinet/sctp_sysctl.h> +#include <netinet/sctp_header.h> +#include <netinet/sctp_pcb.h> +#include <netinet/sctputil.h> +#include <netinet/sctp_output.h> +#include <netinet/sctp_uio.h> +#include <netinet/sctputil.h> +#include <netinet/sctp_auth.h> +#include <netinet/sctp_timer.h> +#include <netinet/sctp_asconf.h> +#include <netinet/sctp_indata.h> +#include <netinet/sctp_bsd_addr.h> +#include <netinet/sctp_input.h> +#include <netinet/sctp_crc32.h> +#if defined(__Userspace_os_Linux) +#define __FAVOR_BSD /* (on Ubuntu at least) enables UDP header field names like BSD in RFC 768 */ +#endif +#if defined(INET) || defined(INET6) +#if !defined(__Userspace_os_Windows) +#include <netinet/udp.h> +#endif +#endif +#if defined(__APPLE__) +#include <netinet/in.h> +#endif +#if defined(__FreeBSD__) +#if defined(__FreeBSD__) && __FreeBSD_version >= 800000 +#include <netinet/udp_var.h> +#endif +#include <machine/in_cksum.h> +#endif +#if defined(__Userspace__) && defined(INET6) +#include <netinet6/sctp6_var.h> +#endif + +#if defined(__APPLE__) +#define APPLE_FILE_NO 3 +#endif + +#if defined(__APPLE__) +#if !(defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)) +#define SCTP_MAX_LINKHDR 16 +#endif +#endif + +#define SCTP_MAX_GAPS_INARRAY 4 +struct sack_track { + uint8_t right_edge; /* mergable on the right edge */ + uint8_t left_edge; /* mergable on the left edge */ + uint8_t num_entries; + uint8_t spare; + struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY]; +}; + +struct sack_track sack_array[256] = { + {0, 0, 0, 0, /* 0x00 */ + {{0, 0}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 1, 0, /* 0x01 */ + {{0, 0}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x02 */ + {{1, 1}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 1, 0, /* 0x03 */ + {{0, 1}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x04 */ + {{2, 2}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x05 */ + {{0, 0}, + {2, 2}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x06 */ + {{1, 2}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 1, 0, /* 0x07 */ + {{0, 2}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x08 */ + {{3, 3}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x09 */ + {{0, 0}, + {3, 3}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x0a */ + {{1, 1}, + {3, 3}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x0b */ + {{0, 1}, + {3, 3}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x0c */ + {{2, 3}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x0d */ + {{0, 0}, + {2, 3}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x0e */ + {{1, 3}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 1, 0, /* 0x0f */ + {{0, 3}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x10 */ + {{4, 4}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x11 */ + {{0, 0}, + {4, 4}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x12 */ + {{1, 1}, + {4, 4}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x13 */ + {{0, 1}, + {4, 4}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x14 */ + {{2, 2}, + {4, 4}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x15 */ + {{0, 0}, + {2, 2}, + {4, 4}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x16 */ + {{1, 2}, + {4, 4}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x17 */ + {{0, 2}, + {4, 4}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x18 */ + {{3, 4}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x19 */ + {{0, 0}, + {3, 4}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x1a */ + {{1, 1}, + {3, 4}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x1b */ + {{0, 1}, + {3, 4}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x1c */ + {{2, 4}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x1d */ + {{0, 0}, + {2, 4}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x1e */ + {{1, 4}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 1, 0, /* 0x1f */ + {{0, 4}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x20 */ + {{5, 5}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x21 */ + {{0, 0}, + {5, 5}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x22 */ + {{1, 1}, + {5, 5}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x23 */ + {{0, 1}, + {5, 5}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x24 */ + {{2, 2}, + {5, 5}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x25 */ + {{0, 0}, + {2, 2}, + {5, 5}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x26 */ + {{1, 2}, + {5, 5}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x27 */ + {{0, 2}, + {5, 5}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x28 */ + {{3, 3}, + {5, 5}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x29 */ + {{0, 0}, + {3, 3}, + {5, 5}, + {0, 0} + } + }, + {0, 0, 3, 0, /* 0x2a */ + {{1, 1}, + {3, 3}, + {5, 5}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x2b */ + {{0, 1}, + {3, 3}, + {5, 5}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x2c */ + {{2, 3}, + {5, 5}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x2d */ + {{0, 0}, + {2, 3}, + {5, 5}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x2e */ + {{1, 3}, + {5, 5}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x2f */ + {{0, 3}, + {5, 5}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x30 */ + {{4, 5}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x31 */ + {{0, 0}, + {4, 5}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x32 */ + {{1, 1}, + {4, 5}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x33 */ + {{0, 1}, + {4, 5}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x34 */ + {{2, 2}, + {4, 5}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x35 */ + {{0, 0}, + {2, 2}, + {4, 5}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x36 */ + {{1, 2}, + {4, 5}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x37 */ + {{0, 2}, + {4, 5}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x38 */ + {{3, 5}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x39 */ + {{0, 0}, + {3, 5}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x3a */ + {{1, 1}, + {3, 5}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x3b */ + {{0, 1}, + {3, 5}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x3c */ + {{2, 5}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x3d */ + {{0, 0}, + {2, 5}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x3e */ + {{1, 5}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 1, 0, /* 0x3f */ + {{0, 5}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x40 */ + {{6, 6}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x41 */ + {{0, 0}, + {6, 6}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x42 */ + {{1, 1}, + {6, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x43 */ + {{0, 1}, + {6, 6}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x44 */ + {{2, 2}, + {6, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x45 */ + {{0, 0}, + {2, 2}, + {6, 6}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x46 */ + {{1, 2}, + {6, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x47 */ + {{0, 2}, + {6, 6}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x48 */ + {{3, 3}, + {6, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x49 */ + {{0, 0}, + {3, 3}, + {6, 6}, + {0, 0} + } + }, + {0, 0, 3, 0, /* 0x4a */ + {{1, 1}, + {3, 3}, + {6, 6}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x4b */ + {{0, 1}, + {3, 3}, + {6, 6}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x4c */ + {{2, 3}, + {6, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x4d */ + {{0, 0}, + {2, 3}, + {6, 6}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x4e */ + {{1, 3}, + {6, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x4f */ + {{0, 3}, + {6, 6}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x50 */ + {{4, 4}, + {6, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x51 */ + {{0, 0}, + {4, 4}, + {6, 6}, + {0, 0} + } + }, + {0, 0, 3, 0, /* 0x52 */ + {{1, 1}, + {4, 4}, + {6, 6}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x53 */ + {{0, 1}, + {4, 4}, + {6, 6}, + {0, 0} + } + }, + {0, 0, 3, 0, /* 0x54 */ + {{2, 2}, + {4, 4}, + {6, 6}, + {0, 0} + } + }, + {1, 0, 4, 0, /* 0x55 */ + {{0, 0}, + {2, 2}, + {4, 4}, + {6, 6} + } + }, + {0, 0, 3, 0, /* 0x56 */ + {{1, 2}, + {4, 4}, + {6, 6}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x57 */ + {{0, 2}, + {4, 4}, + {6, 6}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x58 */ + {{3, 4}, + {6, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x59 */ + {{0, 0}, + {3, 4}, + {6, 6}, + {0, 0} + } + }, + {0, 0, 3, 0, /* 0x5a */ + {{1, 1}, + {3, 4}, + {6, 6}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x5b */ + {{0, 1}, + {3, 4}, + {6, 6}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x5c */ + {{2, 4}, + {6, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x5d */ + {{0, 0}, + {2, 4}, + {6, 6}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x5e */ + {{1, 4}, + {6, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x5f */ + {{0, 4}, + {6, 6}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x60 */ + {{5, 6}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x61 */ + {{0, 0}, + {5, 6}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x62 */ + {{1, 1}, + {5, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x63 */ + {{0, 1}, + {5, 6}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x64 */ + {{2, 2}, + {5, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x65 */ + {{0, 0}, + {2, 2}, + {5, 6}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x66 */ + {{1, 2}, + {5, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x67 */ + {{0, 2}, + {5, 6}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x68 */ + {{3, 3}, + {5, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x69 */ + {{0, 0}, + {3, 3}, + {5, 6}, + {0, 0} + } + }, + {0, 0, 3, 0, /* 0x6a */ + {{1, 1}, + {3, 3}, + {5, 6}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x6b */ + {{0, 1}, + {3, 3}, + {5, 6}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x6c */ + {{2, 3}, + {5, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x6d */ + {{0, 0}, + {2, 3}, + {5, 6}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x6e */ + {{1, 3}, + {5, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x6f */ + {{0, 3}, + {5, 6}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x70 */ + {{4, 6}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x71 */ + {{0, 0}, + {4, 6}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x72 */ + {{1, 1}, + {4, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x73 */ + {{0, 1}, + {4, 6}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x74 */ + {{2, 2}, + {4, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 3, 0, /* 0x75 */ + {{0, 0}, + {2, 2}, + {4, 6}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x76 */ + {{1, 2}, + {4, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x77 */ + {{0, 2}, + {4, 6}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x78 */ + {{3, 6}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x79 */ + {{0, 0}, + {3, 6}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 2, 0, /* 0x7a */ + {{1, 1}, + {3, 6}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x7b */ + {{0, 1}, + {3, 6}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x7c */ + {{2, 6}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 2, 0, /* 0x7d */ + {{0, 0}, + {2, 6}, + {0, 0}, + {0, 0} + } + }, + {0, 0, 1, 0, /* 0x7e */ + {{1, 6}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 0, 1, 0, /* 0x7f */ + {{0, 6}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 1, 0, /* 0x80 */ + {{7, 7}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0x81 */ + {{0, 0}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0x82 */ + {{1, 1}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0x83 */ + {{0, 1}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0x84 */ + {{2, 2}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0x85 */ + {{0, 0}, + {2, 2}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0x86 */ + {{1, 2}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0x87 */ + {{0, 2}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0x88 */ + {{3, 3}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0x89 */ + {{0, 0}, + {3, 3}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 3, 0, /* 0x8a */ + {{1, 1}, + {3, 3}, + {7, 7}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0x8b */ + {{0, 1}, + {3, 3}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0x8c */ + {{2, 3}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0x8d */ + {{0, 0}, + {2, 3}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0x8e */ + {{1, 3}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0x8f */ + {{0, 3}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0x90 */ + {{4, 4}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0x91 */ + {{0, 0}, + {4, 4}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 3, 0, /* 0x92 */ + {{1, 1}, + {4, 4}, + {7, 7}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0x93 */ + {{0, 1}, + {4, 4}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 3, 0, /* 0x94 */ + {{2, 2}, + {4, 4}, + {7, 7}, + {0, 0} + } + }, + {1, 1, 4, 0, /* 0x95 */ + {{0, 0}, + {2, 2}, + {4, 4}, + {7, 7} + } + }, + {0, 1, 3, 0, /* 0x96 */ + {{1, 2}, + {4, 4}, + {7, 7}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0x97 */ + {{0, 2}, + {4, 4}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0x98 */ + {{3, 4}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0x99 */ + {{0, 0}, + {3, 4}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 3, 0, /* 0x9a */ + {{1, 1}, + {3, 4}, + {7, 7}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0x9b */ + {{0, 1}, + {3, 4}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0x9c */ + {{2, 4}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0x9d */ + {{0, 0}, + {2, 4}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0x9e */ + {{1, 4}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0x9f */ + {{0, 4}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xa0 */ + {{5, 5}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xa1 */ + {{0, 0}, + {5, 5}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 3, 0, /* 0xa2 */ + {{1, 1}, + {5, 5}, + {7, 7}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xa3 */ + {{0, 1}, + {5, 5}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 3, 0, /* 0xa4 */ + {{2, 2}, + {5, 5}, + {7, 7}, + {0, 0} + } + }, + {1, 1, 4, 0, /* 0xa5 */ + {{0, 0}, + {2, 2}, + {5, 5}, + {7, 7} + } + }, + {0, 1, 3, 0, /* 0xa6 */ + {{1, 2}, + {5, 5}, + {7, 7}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xa7 */ + {{0, 2}, + {5, 5}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 3, 0, /* 0xa8 */ + {{3, 3}, + {5, 5}, + {7, 7}, + {0, 0} + } + }, + {1, 1, 4, 0, /* 0xa9 */ + {{0, 0}, + {3, 3}, + {5, 5}, + {7, 7} + } + }, + {0, 1, 4, 0, /* 0xaa */ + {{1, 1}, + {3, 3}, + {5, 5}, + {7, 7} + } + }, + {1, 1, 4, 0, /* 0xab */ + {{0, 1}, + {3, 3}, + {5, 5}, + {7, 7} + } + }, + {0, 1, 3, 0, /* 0xac */ + {{2, 3}, + {5, 5}, + {7, 7}, + {0, 0} + } + }, + {1, 1, 4, 0, /* 0xad */ + {{0, 0}, + {2, 3}, + {5, 5}, + {7, 7} + } + }, + {0, 1, 3, 0, /* 0xae */ + {{1, 3}, + {5, 5}, + {7, 7}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xaf */ + {{0, 3}, + {5, 5}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xb0 */ + {{4, 5}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xb1 */ + {{0, 0}, + {4, 5}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 3, 0, /* 0xb2 */ + {{1, 1}, + {4, 5}, + {7, 7}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xb3 */ + {{0, 1}, + {4, 5}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 3, 0, /* 0xb4 */ + {{2, 2}, + {4, 5}, + {7, 7}, + {0, 0} + } + }, + {1, 1, 4, 0, /* 0xb5 */ + {{0, 0}, + {2, 2}, + {4, 5}, + {7, 7} + } + }, + {0, 1, 3, 0, /* 0xb6 */ + {{1, 2}, + {4, 5}, + {7, 7}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xb7 */ + {{0, 2}, + {4, 5}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xb8 */ + {{3, 5}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xb9 */ + {{0, 0}, + {3, 5}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 3, 0, /* 0xba */ + {{1, 1}, + {3, 5}, + {7, 7}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xbb */ + {{0, 1}, + {3, 5}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xbc */ + {{2, 5}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xbd */ + {{0, 0}, + {2, 5}, + {7, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xbe */ + {{1, 5}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0xbf */ + {{0, 5}, + {7, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 1, 0, /* 0xc0 */ + {{6, 7}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0xc1 */ + {{0, 0}, + {6, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xc2 */ + {{1, 1}, + {6, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0xc3 */ + {{0, 1}, + {6, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xc4 */ + {{2, 2}, + {6, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xc5 */ + {{0, 0}, + {2, 2}, + {6, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xc6 */ + {{1, 2}, + {6, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0xc7 */ + {{0, 2}, + {6, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xc8 */ + {{3, 3}, + {6, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xc9 */ + {{0, 0}, + {3, 3}, + {6, 7}, + {0, 0} + } + }, + {0, 1, 3, 0, /* 0xca */ + {{1, 1}, + {3, 3}, + {6, 7}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xcb */ + {{0, 1}, + {3, 3}, + {6, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xcc */ + {{2, 3}, + {6, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xcd */ + {{0, 0}, + {2, 3}, + {6, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xce */ + {{1, 3}, + {6, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0xcf */ + {{0, 3}, + {6, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xd0 */ + {{4, 4}, + {6, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xd1 */ + {{0, 0}, + {4, 4}, + {6, 7}, + {0, 0} + } + }, + {0, 1, 3, 0, /* 0xd2 */ + {{1, 1}, + {4, 4}, + {6, 7}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xd3 */ + {{0, 1}, + {4, 4}, + {6, 7}, + {0, 0} + } + }, + {0, 1, 3, 0, /* 0xd4 */ + {{2, 2}, + {4, 4}, + {6, 7}, + {0, 0} + } + }, + {1, 1, 4, 0, /* 0xd5 */ + {{0, 0}, + {2, 2}, + {4, 4}, + {6, 7} + } + }, + {0, 1, 3, 0, /* 0xd6 */ + {{1, 2}, + {4, 4}, + {6, 7}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xd7 */ + {{0, 2}, + {4, 4}, + {6, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xd8 */ + {{3, 4}, + {6, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xd9 */ + {{0, 0}, + {3, 4}, + {6, 7}, + {0, 0} + } + }, + {0, 1, 3, 0, /* 0xda */ + {{1, 1}, + {3, 4}, + {6, 7}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xdb */ + {{0, 1}, + {3, 4}, + {6, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xdc */ + {{2, 4}, + {6, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xdd */ + {{0, 0}, + {2, 4}, + {6, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xde */ + {{1, 4}, + {6, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0xdf */ + {{0, 4}, + {6, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 1, 0, /* 0xe0 */ + {{5, 7}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0xe1 */ + {{0, 0}, + {5, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xe2 */ + {{1, 1}, + {5, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0xe3 */ + {{0, 1}, + {5, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xe4 */ + {{2, 2}, + {5, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xe5 */ + {{0, 0}, + {2, 2}, + {5, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xe6 */ + {{1, 2}, + {5, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0xe7 */ + {{0, 2}, + {5, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xe8 */ + {{3, 3}, + {5, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xe9 */ + {{0, 0}, + {3, 3}, + {5, 7}, + {0, 0} + } + }, + {0, 1, 3, 0, /* 0xea */ + {{1, 1}, + {3, 3}, + {5, 7}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xeb */ + {{0, 1}, + {3, 3}, + {5, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xec */ + {{2, 3}, + {5, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xed */ + {{0, 0}, + {2, 3}, + {5, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xee */ + {{1, 3}, + {5, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0xef */ + {{0, 3}, + {5, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 1, 0, /* 0xf0 */ + {{4, 7}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0xf1 */ + {{0, 0}, + {4, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xf2 */ + {{1, 1}, + {4, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0xf3 */ + {{0, 1}, + {4, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xf4 */ + {{2, 2}, + {4, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 3, 0, /* 0xf5 */ + {{0, 0}, + {2, 2}, + {4, 7}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xf6 */ + {{1, 2}, + {4, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0xf7 */ + {{0, 2}, + {4, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 1, 0, /* 0xf8 */ + {{3, 7}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0xf9 */ + {{0, 0}, + {3, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 2, 0, /* 0xfa */ + {{1, 1}, + {3, 7}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0xfb */ + {{0, 1}, + {3, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 1, 0, /* 0xfc */ + {{2, 7}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 2, 0, /* 0xfd */ + {{0, 0}, + {2, 7}, + {0, 0}, + {0, 0} + } + }, + {0, 1, 1, 0, /* 0xfe */ + {{1, 7}, + {0, 0}, + {0, 0}, + {0, 0} + } + }, + {1, 1, 1, 0, /* 0xff */ + {{0, 7}, + {0, 0}, + {0, 0}, + {0, 0} + } + } +}; + + +int +sctp_is_address_in_scope(struct sctp_ifa *ifa, + struct sctp_scoping *scope, + int do_update) +{ + if ((scope->loopback_scope == 0) && + (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) { + /* + * skip loopback if not in scope * + */ + return (0); + } + switch (ifa->address.sa.sa_family) { +#ifdef INET + case AF_INET: + if (scope->ipv4_addr_legal) { + struct sockaddr_in *sin; + + sin = &ifa->address.sin; + if (sin->sin_addr.s_addr == 0) { + /* not in scope , unspecified */ + return (0); + } + if ((scope->ipv4_local_scope == 0) && + (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { + /* private address not in scope */ + return (0); + } + } else { + return (0); + } + break; +#endif +#ifdef INET6 + case AF_INET6: + if (scope->ipv6_addr_legal) { + struct sockaddr_in6 *sin6; + +#if !defined(__Panda__) + /* Must update the flags, bummer, which + * means any IFA locks must now be applied HERE <-> + */ + if (do_update) { + sctp_gather_internal_ifa_flags(ifa); + } +#endif + if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { + return (0); + } + /* ok to use deprecated addresses? */ + sin6 = &ifa->address.sin6; + if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { + /* skip unspecifed addresses */ + return (0); + } + if ( /* (local_scope == 0) && */ + (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { + return (0); + } + if ((scope->site_scope == 0) && + (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { + return (0); + } + } else { + return (0); + } + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + if (!scope->conn_addr_legal) { + return (0); + } + break; +#endif + default: + return (0); + } + return (1); +} + +static struct mbuf * +sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t *len) +{ +#if defined(INET) || defined(INET6) + struct sctp_paramhdr *parmh; + struct mbuf *mret; + uint16_t plen; +#endif + + switch (ifa->address.sa.sa_family) { +#ifdef INET + case AF_INET: + plen = (uint16_t)sizeof(struct sctp_ipv4addr_param); + break; +#endif +#ifdef INET6 + case AF_INET6: + plen = (uint16_t)sizeof(struct sctp_ipv6addr_param); + break; +#endif + default: + return (m); + } +#if defined(INET) || defined(INET6) + if (M_TRAILINGSPACE(m) >= plen) { + /* easy side we just drop it on the end */ + parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m))); + mret = m; + } else { + /* Need more space */ + mret = m; + while (SCTP_BUF_NEXT(mret) != NULL) { + mret = SCTP_BUF_NEXT(mret); + } + SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_NOWAIT, 1, MT_DATA); + if (SCTP_BUF_NEXT(mret) == NULL) { + /* We are hosed, can't add more addresses */ + return (m); + } + mret = SCTP_BUF_NEXT(mret); + parmh = mtod(mret, struct sctp_paramhdr *); + } + /* now add the parameter */ + switch (ifa->address.sa.sa_family) { +#ifdef INET + case AF_INET: + { + struct sctp_ipv4addr_param *ipv4p; + struct sockaddr_in *sin; + + sin = &ifa->address.sin; + ipv4p = (struct sctp_ipv4addr_param *)parmh; + parmh->param_type = htons(SCTP_IPV4_ADDRESS); + parmh->param_length = htons(plen); + ipv4p->addr = sin->sin_addr.s_addr; + SCTP_BUF_LEN(mret) += plen; + break; + } +#endif +#ifdef INET6 + case AF_INET6: + { + struct sctp_ipv6addr_param *ipv6p; + struct sockaddr_in6 *sin6; + + sin6 = &ifa->address.sin6; + ipv6p = (struct sctp_ipv6addr_param *)parmh; + parmh->param_type = htons(SCTP_IPV6_ADDRESS); + parmh->param_length = htons(plen); + memcpy(ipv6p->addr, &sin6->sin6_addr, + sizeof(ipv6p->addr)); +#if defined(SCTP_EMBEDDED_V6_SCOPE) + /* clear embedded scope in the address */ + in6_clearscope((struct in6_addr *)ipv6p->addr); +#endif + SCTP_BUF_LEN(mret) += plen; + break; + } +#endif + default: + return (m); + } + if (len != NULL) { + *len += plen; + } + return (mret); +#endif +} + + +struct mbuf * +sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb, + struct sctp_scoping *scope, + struct mbuf *m_at, int cnt_inits_to, + uint16_t *padding_len, uint16_t *chunk_len) +{ + struct sctp_vrf *vrf = NULL; + int cnt, limit_out = 0, total_count; + uint32_t vrf_id; + + vrf_id = inp->def_vrf_id; + SCTP_IPI_ADDR_RLOCK(); + vrf = sctp_find_vrf(vrf_id); + if (vrf == NULL) { + SCTP_IPI_ADDR_RUNLOCK(); + return (m_at); + } + if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { + struct sctp_ifa *sctp_ifap; + struct sctp_ifn *sctp_ifnp; + + cnt = cnt_inits_to; + if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) { + limit_out = 1; + cnt = SCTP_ADDRESS_LIMIT; + goto skip_count; + } + LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { + if ((scope->loopback_scope == 0) && + SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) { + /* + * Skip loopback devices if loopback_scope + * not set + */ + continue; + } + LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { +#if defined(__FreeBSD__) +#ifdef INET + if ((sctp_ifap->address.sa.sa_family == AF_INET) && + (prison_check_ip4(inp->ip_inp.inp.inp_cred, + &sctp_ifap->address.sin.sin_addr) != 0)) { + continue; + } +#endif +#ifdef INET6 + if ((sctp_ifap->address.sa.sa_family == AF_INET6) && + (prison_check_ip6(inp->ip_inp.inp.inp_cred, + &sctp_ifap->address.sin6.sin6_addr) != 0)) { + continue; + } +#endif +#endif + if (sctp_is_addr_restricted(stcb, sctp_ifap)) { + continue; + } +#if defined(__Userspace__) + if (sctp_ifap->address.sa.sa_family == AF_CONN) { + continue; + } +#endif + if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) { + continue; + } + cnt++; + if (cnt > SCTP_ADDRESS_LIMIT) { + break; + } + } + if (cnt > SCTP_ADDRESS_LIMIT) { + break; + } + } + skip_count: + if (cnt > 1) { + total_count = 0; + LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { + cnt = 0; + if ((scope->loopback_scope == 0) && + SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) { + /* + * Skip loopback devices if + * loopback_scope not set + */ + continue; + } + LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { +#if defined(__FreeBSD__) +#ifdef INET + if ((sctp_ifap->address.sa.sa_family == AF_INET) && + (prison_check_ip4(inp->ip_inp.inp.inp_cred, + &sctp_ifap->address.sin.sin_addr) != 0)) { + continue; + } +#endif +#ifdef INET6 + if ((sctp_ifap->address.sa.sa_family == AF_INET6) && + (prison_check_ip6(inp->ip_inp.inp.inp_cred, + &sctp_ifap->address.sin6.sin6_addr) != 0)) { + continue; + } +#endif +#endif + if (sctp_is_addr_restricted(stcb, sctp_ifap)) { + continue; + } +#if defined(__Userspace__) + if (sctp_ifap->address.sa.sa_family == AF_CONN) { + continue; + } +#endif + if (sctp_is_address_in_scope(sctp_ifap, + scope, 0) == 0) { + continue; + } + if ((chunk_len != NULL) && + (padding_len != NULL) && + (*padding_len > 0)) { + memset(mtod(m_at, caddr_t) + *chunk_len, 0, *padding_len); + SCTP_BUF_LEN(m_at) += *padding_len; + *chunk_len += *padding_len; + *padding_len = 0; + } + m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len); + if (limit_out) { + cnt++; + total_count++; + if (cnt >= 2) { + /* two from each address */ + break; + } + if (total_count > SCTP_ADDRESS_LIMIT) { + /* No more addresses */ + break; + } + } + } + } + } + } else { + struct sctp_laddr *laddr; + + cnt = cnt_inits_to; + /* First, how many ? */ + LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { + if (laddr->ifa == NULL) { + continue; + } + if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) + /* Address being deleted by the system, dont + * list. + */ + continue; + if (laddr->action == SCTP_DEL_IP_ADDRESS) { + /* Address being deleted on this ep + * don't list. + */ + continue; + } +#if defined(__Userspace__) + if (laddr->ifa->address.sa.sa_family == AF_CONN) { + continue; + } +#endif + if (sctp_is_address_in_scope(laddr->ifa, + scope, 1) == 0) { + continue; + } + cnt++; + } + /* + * To get through a NAT we only list addresses if we have + * more than one. That way if you just bind a single address + * we let the source of the init dictate our address. + */ + if (cnt > 1) { + cnt = cnt_inits_to; + LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { + if (laddr->ifa == NULL) { + continue; + } + if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { + continue; + } +#if defined(__Userspace__) + if (laddr->ifa->address.sa.sa_family == AF_CONN) { + continue; + } +#endif + if (sctp_is_address_in_scope(laddr->ifa, + scope, 0) == 0) { + continue; + } + if ((chunk_len != NULL) && + (padding_len != NULL) && + (*padding_len > 0)) { + memset(mtod(m_at, caddr_t) + *chunk_len, 0, *padding_len); + SCTP_BUF_LEN(m_at) += *padding_len; + *chunk_len += *padding_len; + *padding_len = 0; + } + m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len); + cnt++; + if (cnt >= SCTP_ADDRESS_LIMIT) { + break; + } + } + } + } + SCTP_IPI_ADDR_RUNLOCK(); + return (m_at); +} + +static struct sctp_ifa * +sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa, + uint8_t dest_is_loop, + uint8_t dest_is_priv, + sa_family_t fam) +{ + uint8_t dest_is_global = 0; + /* dest_is_priv is true if destination is a private address */ + /* dest_is_loop is true if destination is a loopback addresses */ + + /** + * Here we determine if its a preferred address. A preferred address + * means it is the same scope or higher scope then the destination. + * L = loopback, P = private, G = global + * ----------------------------------------- + * src | dest | result + * ---------------------------------------- + * L | L | yes + * ----------------------------------------- + * P | L | yes-v4 no-v6 + * ----------------------------------------- + * G | L | yes-v4 no-v6 + * ----------------------------------------- + * L | P | no + * ----------------------------------------- + * P | P | yes + * ----------------------------------------- + * G | P | no + * ----------------------------------------- + * L | G | no + * ----------------------------------------- + * P | G | no + * ----------------------------------------- + * G | G | yes + * ----------------------------------------- + */ + + if (ifa->address.sa.sa_family != fam) { + /* forget mis-matched family */ + return (NULL); + } + if ((dest_is_priv == 0) && (dest_is_loop == 0)) { + dest_is_global = 1; + } + SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:"); + SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa); + /* Ok the address may be ok */ +#ifdef INET6 + if (fam == AF_INET6) { + /* ok to use deprecated addresses? no lets not! */ + if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { + SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n"); + return (NULL); + } + if (ifa->src_is_priv && !ifa->src_is_loop) { + if (dest_is_loop) { + SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n"); + return (NULL); + } + } + if (ifa->src_is_glob) { + if (dest_is_loop) { + SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n"); + return (NULL); + } + } + } +#endif + /* Now that we know what is what, implement or table + * this could in theory be done slicker (it used to be), but this + * is straightforward and easier to validate :-) + */ + SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n", + ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob); + SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n", + dest_is_loop, dest_is_priv, dest_is_global); + + if ((ifa->src_is_loop) && (dest_is_priv)) { + SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n"); + return (NULL); + } + if ((ifa->src_is_glob) && (dest_is_priv)) { + SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n"); + return (NULL); + } + if ((ifa->src_is_loop) && (dest_is_global)) { + SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n"); + return (NULL); + } + if ((ifa->src_is_priv) && (dest_is_global)) { + SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n"); + return (NULL); + } + SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n"); + /* its a preferred address */ + return (ifa); +} + +static struct sctp_ifa * +sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa, + uint8_t dest_is_loop, + uint8_t dest_is_priv, + sa_family_t fam) +{ + uint8_t dest_is_global = 0; + + /** + * Here we determine if its a acceptable address. A acceptable + * address means it is the same scope or higher scope but we can + * allow for NAT which means its ok to have a global dest and a + * private src. + * + * L = loopback, P = private, G = global + * ----------------------------------------- + * src | dest | result + * ----------------------------------------- + * L | L | yes + * ----------------------------------------- + * P | L | yes-v4 no-v6 + * ----------------------------------------- + * G | L | yes + * ----------------------------------------- + * L | P | no + * ----------------------------------------- + * P | P | yes + * ----------------------------------------- + * G | P | yes - May not work + * ----------------------------------------- + * L | G | no + * ----------------------------------------- + * P | G | yes - May not work + * ----------------------------------------- + * G | G | yes + * ----------------------------------------- + */ + + if (ifa->address.sa.sa_family != fam) { + /* forget non matching family */ + SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n", + ifa->address.sa.sa_family, fam); + return (NULL); + } + /* Ok the address may be ok */ + SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa); + SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n", + dest_is_loop, dest_is_priv); + if ((dest_is_loop == 0) && (dest_is_priv == 0)) { + dest_is_global = 1; + } +#ifdef INET6 + if (fam == AF_INET6) { + /* ok to use deprecated addresses? */ + if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { + return (NULL); + } + if (ifa->src_is_priv) { + /* Special case, linklocal to loop */ + if (dest_is_loop) + return (NULL); + } + } +#endif + /* + * Now that we know what is what, implement our table. + * This could in theory be done slicker (it used to be), but this + * is straightforward and easier to validate :-) + */ + SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n", + ifa->src_is_loop, + dest_is_priv); + if ((ifa->src_is_loop == 1) && (dest_is_priv)) { + return (NULL); + } + SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n", + ifa->src_is_loop, + dest_is_global); + if ((ifa->src_is_loop == 1) && (dest_is_global)) { + return (NULL); + } + SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n"); + /* its an acceptable address */ + return (ifa); +} + +int +sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) +{ + struct sctp_laddr *laddr; + + if (stcb == NULL) { + /* There are no restrictions, no TCB :-) */ + return (0); + } + LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { + if (laddr->ifa == NULL) { + SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n", + __FUNCTION__); + continue; + } + if (laddr->ifa == ifa) { + /* Yes it is on the list */ + return (1); + } + } + return (0); +} + + +int +sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) +{ + struct sctp_laddr *laddr; + + if (ifa == NULL) + return (0); + LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { + if (laddr->ifa == NULL) { + SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n", + __FUNCTION__); + continue; + } + if ((laddr->ifa == ifa) && laddr->action == 0) + /* same pointer */ + return (1); + } + return (0); +} + + + +static struct sctp_ifa * +sctp_choose_boundspecific_inp(struct sctp_inpcb *inp, + sctp_route_t *ro, + uint32_t vrf_id, + int non_asoc_addr_ok, + uint8_t dest_is_priv, + uint8_t dest_is_loop, + sa_family_t fam) +{ + struct sctp_laddr *laddr, *starting_point; + void *ifn; + int resettotop = 0; + struct sctp_ifn *sctp_ifn; + struct sctp_ifa *sctp_ifa, *sifa; + struct sctp_vrf *vrf; + uint32_t ifn_index; + + vrf = sctp_find_vrf(vrf_id); + if (vrf == NULL) + return (NULL); + + ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); + ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); + sctp_ifn = sctp_find_ifn(ifn, ifn_index); + /* + * first question, is the ifn we will emit on in our list, if so, we + * want such an address. Note that we first looked for a + * preferred address. + */ + if (sctp_ifn) { + /* is a preferred one on the interface we route out? */ + LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { +#if defined(__FreeBSD__) +#ifdef INET + if ((sctp_ifa->address.sa.sa_family == AF_INET) && + (prison_check_ip4(inp->ip_inp.inp.inp_cred, + &sctp_ifa->address.sin.sin_addr) != 0)) { + continue; + } +#endif +#ifdef INET6 + if ((sctp_ifa->address.sa.sa_family == AF_INET6) && + (prison_check_ip6(inp->ip_inp.inp.inp_cred, + &sctp_ifa->address.sin6.sin6_addr) != 0)) { + continue; + } +#endif +#endif + if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && + (non_asoc_addr_ok == 0)) + continue; + sifa = sctp_is_ifa_addr_preferred(sctp_ifa, + dest_is_loop, + dest_is_priv, fam); + if (sifa == NULL) + continue; + if (sctp_is_addr_in_ep(inp, sifa)) { + atomic_add_int(&sifa->refcount, 1); + return (sifa); + } + } + } + /* + * ok, now we now need to find one on the list of the addresses. + * We can't get one on the emitting interface so let's find first + * a preferred one. If not that an acceptable one otherwise... + * we return NULL. + */ + starting_point = inp->next_addr_touse; + once_again: + if (inp->next_addr_touse == NULL) { + inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list); + resettotop = 1; + } + for (laddr = inp->next_addr_touse; laddr; + laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { + if (laddr->ifa == NULL) { + /* address has been removed */ + continue; + } + if (laddr->action == SCTP_DEL_IP_ADDRESS) { + /* address is being deleted */ + continue; + } + sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, + dest_is_priv, fam); + if (sifa == NULL) + continue; + atomic_add_int(&sifa->refcount, 1); + return (sifa); + } + if (resettotop == 0) { + inp->next_addr_touse = NULL; + goto once_again; + } + + inp->next_addr_touse = starting_point; + resettotop = 0; + once_again_too: + if (inp->next_addr_touse == NULL) { + inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list); + resettotop = 1; + } + + /* ok, what about an acceptable address in the inp */ + for (laddr = inp->next_addr_touse; laddr; + laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { + if (laddr->ifa == NULL) { + /* address has been removed */ + continue; + } + if (laddr->action == SCTP_DEL_IP_ADDRESS) { + /* address is being deleted */ + continue; + } + sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop, + dest_is_priv, fam); + if (sifa == NULL) + continue; + atomic_add_int(&sifa->refcount, 1); + return (sifa); + } + if (resettotop == 0) { + inp->next_addr_touse = NULL; + goto once_again_too; + } + + /* + * no address bound can be a source for the destination we are in + * trouble + */ + return (NULL); +} + + + +static struct sctp_ifa * +sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp, + struct sctp_tcb *stcb, + sctp_route_t *ro, + uint32_t vrf_id, + uint8_t dest_is_priv, + uint8_t dest_is_loop, + int non_asoc_addr_ok, + sa_family_t fam) +{ + struct sctp_laddr *laddr, *starting_point; + void *ifn; + struct sctp_ifn *sctp_ifn; + struct sctp_ifa *sctp_ifa, *sifa; + uint8_t start_at_beginning = 0; + struct sctp_vrf *vrf; + uint32_t ifn_index; + + /* + * first question, is the ifn we will emit on in our list, if so, we + * want that one. + */ + vrf = sctp_find_vrf(vrf_id); + if (vrf == NULL) + return (NULL); + + ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); + ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); + sctp_ifn = sctp_find_ifn( ifn, ifn_index); + + /* + * first question, is the ifn we will emit on in our list? If so, + * we want that one. First we look for a preferred. Second, we go + * for an acceptable. + */ + if (sctp_ifn) { + /* first try for a preferred address on the ep */ + LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { +#if defined(__FreeBSD__) +#ifdef INET + if ((sctp_ifa->address.sa.sa_family == AF_INET) && + (prison_check_ip4(inp->ip_inp.inp.inp_cred, + &sctp_ifa->address.sin.sin_addr) != 0)) { + continue; + } +#endif +#ifdef INET6 + if ((sctp_ifa->address.sa.sa_family == AF_INET6) && + (prison_check_ip6(inp->ip_inp.inp.inp_cred, + &sctp_ifa->address.sin6.sin6_addr) != 0)) { + continue; + } +#endif +#endif + if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0)) + continue; + if (sctp_is_addr_in_ep(inp, sctp_ifa)) { + sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam); + if (sifa == NULL) + continue; + if (((non_asoc_addr_ok == 0) && + (sctp_is_addr_restricted(stcb, sifa))) || + (non_asoc_addr_ok && + (sctp_is_addr_restricted(stcb, sifa)) && + (!sctp_is_addr_pending(stcb, sifa)))) { + /* on the no-no list */ + continue; + } + atomic_add_int(&sifa->refcount, 1); + return (sifa); + } + } + /* next try for an acceptable address on the ep */ + LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { +#if defined(__FreeBSD__) +#ifdef INET + if ((sctp_ifa->address.sa.sa_family == AF_INET) && + (prison_check_ip4(inp->ip_inp.inp.inp_cred, + &sctp_ifa->address.sin.sin_addr) != 0)) { + continue; + } +#endif +#ifdef INET6 + if ((sctp_ifa->address.sa.sa_family == AF_INET6) && + (prison_check_ip6(inp->ip_inp.inp.inp_cred, + &sctp_ifa->address.sin6.sin6_addr) != 0)) { + continue; + } +#endif +#endif + if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0)) + continue; + if (sctp_is_addr_in_ep(inp, sctp_ifa)) { + sifa= sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv,fam); + if (sifa == NULL) + continue; + if (((non_asoc_addr_ok == 0) && + (sctp_is_addr_restricted(stcb, sifa))) || + (non_asoc_addr_ok && + (sctp_is_addr_restricted(stcb, sifa)) && + (!sctp_is_addr_pending(stcb, sifa)))) { + /* on the no-no list */ + continue; + } + atomic_add_int(&sifa->refcount, 1); + return (sifa); + } + } + + } + /* + * if we can't find one like that then we must look at all + * addresses bound to pick one at first preferable then + * secondly acceptable. + */ + starting_point = stcb->asoc.last_used_address; + sctp_from_the_top: + if (stcb->asoc.last_used_address == NULL) { + start_at_beginning = 1; + stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list); + } + /* search beginning with the last used address */ + for (laddr = stcb->asoc.last_used_address; laddr; + laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { + if (laddr->ifa == NULL) { + /* address has been removed */ + continue; + } + if (laddr->action == SCTP_DEL_IP_ADDRESS) { + /* address is being deleted */ + continue; + } + sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam); + if (sifa == NULL) + continue; + if (((non_asoc_addr_ok == 0) && + (sctp_is_addr_restricted(stcb, sifa))) || + (non_asoc_addr_ok && + (sctp_is_addr_restricted(stcb, sifa)) && + (!sctp_is_addr_pending(stcb, sifa)))) { + /* on the no-no list */ + continue; + } + stcb->asoc.last_used_address = laddr; + atomic_add_int(&sifa->refcount, 1); + return (sifa); + } + if (start_at_beginning == 0) { + stcb->asoc.last_used_address = NULL; + goto sctp_from_the_top; + } + /* now try for any higher scope than the destination */ + stcb->asoc.last_used_address = starting_point; + start_at_beginning = 0; + sctp_from_the_top2: + if (stcb->asoc.last_used_address == NULL) { + start_at_beginning = 1; + stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list); + } + /* search beginning with the last used address */ + for (laddr = stcb->asoc.last_used_address; laddr; + laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { + if (laddr->ifa == NULL) { + /* address has been removed */ + continue; + } + if (laddr->action == SCTP_DEL_IP_ADDRESS) { + /* address is being deleted */ + continue; + } + sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop, + dest_is_priv, fam); + if (sifa == NULL) + continue; + if (((non_asoc_addr_ok == 0) && + (sctp_is_addr_restricted(stcb, sifa))) || + (non_asoc_addr_ok && + (sctp_is_addr_restricted(stcb, sifa)) && + (!sctp_is_addr_pending(stcb, sifa)))) { + /* on the no-no list */ + continue; + } + stcb->asoc.last_used_address = laddr; + atomic_add_int(&sifa->refcount, 1); + return (sifa); + } + if (start_at_beginning == 0) { + stcb->asoc.last_used_address = NULL; + goto sctp_from_the_top2; + } + return (NULL); +} + +static struct sctp_ifa * +sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn, +#if defined(__FreeBSD__) + struct sctp_inpcb *inp, +#else + struct sctp_inpcb *inp SCTP_UNUSED, +#endif + struct sctp_tcb *stcb, + int non_asoc_addr_ok, + uint8_t dest_is_loop, + uint8_t dest_is_priv, + int addr_wanted, + sa_family_t fam, + sctp_route_t *ro + ) +{ + struct sctp_ifa *ifa, *sifa; + int num_eligible_addr = 0; +#ifdef INET6 +#ifdef SCTP_EMBEDDED_V6_SCOPE + struct sockaddr_in6 sin6, lsa6; + + if (fam == AF_INET6) { + memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6)); +#ifdef SCTP_KAME + (void)sa6_recoverscope(&sin6); +#else + (void)in6_recoverscope(&sin6, &sin6.sin6_addr, NULL); +#endif /* SCTP_KAME */ + } +#endif /* SCTP_EMBEDDED_V6_SCOPE */ +#endif /* INET6 */ + LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) { +#if defined(__FreeBSD__) +#ifdef INET + if ((ifa->address.sa.sa_family == AF_INET) && + (prison_check_ip4(inp->ip_inp.inp.inp_cred, + &ifa->address.sin.sin_addr) != 0)) { + continue; + } +#endif +#ifdef INET6 + if ((ifa->address.sa.sa_family == AF_INET6) && + (prison_check_ip6(inp->ip_inp.inp.inp_cred, + &ifa->address.sin6.sin6_addr) != 0)) { + continue; + } +#endif +#endif + if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && + (non_asoc_addr_ok == 0)) + continue; + sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop, + dest_is_priv, fam); + if (sifa == NULL) + continue; +#ifdef INET6 + if (fam == AF_INET6 && + dest_is_loop && + sifa->src_is_loop && sifa->src_is_priv) { + /* don't allow fe80::1 to be a src on loop ::1, we don't list it + * to the peer so we will get an abort. + */ + continue; + } +#ifdef SCTP_EMBEDDED_V6_SCOPE + if (fam == AF_INET6 && + IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) && + IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { + /* link-local <-> link-local must belong to the same scope. */ + memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6)); +#ifdef SCTP_KAME + (void)sa6_recoverscope(&lsa6); +#else + (void)in6_recoverscope(&lsa6, &lsa6.sin6_addr, NULL); +#endif /* SCTP_KAME */ + if (sin6.sin6_scope_id != lsa6.sin6_scope_id) { + continue; + } + } +#endif /* SCTP_EMBEDDED_V6_SCOPE */ +#endif /* INET6 */ + +#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__Userspace__) + /* Check if the IPv6 address matches to next-hop. + In the mobile case, old IPv6 address may be not deleted + from the interface. Then, the interface has previous and + new addresses. We should use one corresponding to the + next-hop. (by micchie) + */ +#ifdef INET6 + if (stcb && fam == AF_INET6 && + sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) { + if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro) + == 0) { + continue; + } + } +#endif +#ifdef INET + /* Avoid topologically incorrect IPv4 address */ + if (stcb && fam == AF_INET && + sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) { + if (sctp_v4src_match_nexthop(sifa, ro) == 0) { + continue; + } + } +#endif +#endif + if (stcb) { + if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { + continue; + } + if (((non_asoc_addr_ok == 0) && + (sctp_is_addr_restricted(stcb, sifa))) || + (non_asoc_addr_ok && + (sctp_is_addr_restricted(stcb, sifa)) && + (!sctp_is_addr_pending(stcb, sifa)))) { + /* + * It is restricted for some reason.. + * probably not yet added. + */ + continue; + } + } + if (num_eligible_addr >= addr_wanted) { + return (sifa); + } + num_eligible_addr++; + } + return (NULL); +} + + +static int +sctp_count_num_preferred_boundall(struct sctp_ifn *ifn, +#if defined(__FreeBSD__) + struct sctp_inpcb *inp, +#else + struct sctp_inpcb *inp SCTP_UNUSED, +#endif + struct sctp_tcb *stcb, + int non_asoc_addr_ok, + uint8_t dest_is_loop, + uint8_t dest_is_priv, + sa_family_t fam) +{ + struct sctp_ifa *ifa, *sifa; + int num_eligible_addr = 0; + + LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) { +#if defined(__FreeBSD__) +#ifdef INET + if ((ifa->address.sa.sa_family == AF_INET) && + (prison_check_ip4(inp->ip_inp.inp.inp_cred, + &ifa->address.sin.sin_addr) != 0)) { + continue; + } +#endif +#ifdef INET6 + if ((ifa->address.sa.sa_family == AF_INET6) && + (stcb != NULL) && + (prison_check_ip6(inp->ip_inp.inp.inp_cred, + &ifa->address.sin6.sin6_addr) != 0)) { + continue; + } +#endif +#endif + if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && + (non_asoc_addr_ok == 0)) { + continue; + } + sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop, + dest_is_priv, fam); + if (sifa == NULL) { + continue; + } + if (stcb) { + if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { + continue; + } + if (((non_asoc_addr_ok == 0) && + (sctp_is_addr_restricted(stcb, sifa))) || + (non_asoc_addr_ok && + (sctp_is_addr_restricted(stcb, sifa)) && + (!sctp_is_addr_pending(stcb, sifa)))) { + /* + * It is restricted for some reason.. + * probably not yet added. + */ + continue; + } + } + num_eligible_addr++; + } + return (num_eligible_addr); +} + +static struct sctp_ifa * +sctp_choose_boundall(struct sctp_inpcb *inp, + struct sctp_tcb *stcb, + struct sctp_nets *net, + sctp_route_t *ro, + uint32_t vrf_id, + uint8_t dest_is_priv, + uint8_t dest_is_loop, + int non_asoc_addr_ok, + sa_family_t fam) +{ + int cur_addr_num = 0, num_preferred = 0; + void *ifn; + struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn; + struct sctp_ifa *sctp_ifa, *sifa; + uint32_t ifn_index; + struct sctp_vrf *vrf; +#ifdef INET + int retried = 0; +#endif + + /*- + * For boundall we can use any address in the association. + * If non_asoc_addr_ok is set we can use any address (at least in + * theory). So we look for preferred addresses first. If we find one, + * we use it. Otherwise we next try to get an address on the + * interface, which we should be able to do (unless non_asoc_addr_ok + * is false and we are routed out that way). In these cases where we + * can't use the address of the interface we go through all the + * ifn's looking for an address we can use and fill that in. Punting + * means we send back address 0, which will probably cause problems + * actually since then IP will fill in the address of the route ifn, + * which means we probably already rejected it.. i.e. here comes an + * abort :-<. + */ + vrf = sctp_find_vrf(vrf_id); + if (vrf == NULL) + return (NULL); + + ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); + ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); + SCTPDBG(SCTP_DEBUG_OUTPUT2,"ifn from route:%p ifn_index:%d\n", ifn, ifn_index); + emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index); + if (sctp_ifn == NULL) { + /* ?? We don't have this guy ?? */ + SCTPDBG(SCTP_DEBUG_OUTPUT2,"No ifn emit interface?\n"); + goto bound_all_plan_b; + } + SCTPDBG(SCTP_DEBUG_OUTPUT2,"ifn_index:%d name:%s is emit interface\n", + ifn_index, sctp_ifn->ifn_name); + + if (net) { + cur_addr_num = net->indx_of_eligible_next_to_use; + } + num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, + inp, stcb, + non_asoc_addr_ok, + dest_is_loop, + dest_is_priv, fam); + SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n", + num_preferred, sctp_ifn->ifn_name); + if (num_preferred == 0) { + /* + * no eligible addresses, we must use some other interface + * address if we can find one. + */ + goto bound_all_plan_b; + } + /* + * Ok we have num_eligible_addr set with how many we can use, this + * may vary from call to call due to addresses being deprecated + * etc.. + */ + if (cur_addr_num >= num_preferred) { + cur_addr_num = 0; + } + /* + * select the nth address from the list (where cur_addr_num is the + * nth) and 0 is the first one, 1 is the second one etc... + */ + SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num); + + sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop, + dest_is_priv, cur_addr_num, fam, ro); + + /* if sctp_ifa is NULL something changed??, fall to plan b. */ + if (sctp_ifa) { + atomic_add_int(&sctp_ifa->refcount, 1); + if (net) { + /* save off where the next one we will want */ + net->indx_of_eligible_next_to_use = cur_addr_num + 1; + } + return (sctp_ifa); + } + /* + * plan_b: Look at all interfaces and find a preferred address. If + * no preferred fall through to plan_c. + */ + bound_all_plan_b: + SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n"); + LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { + SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n", + sctp_ifn->ifn_name); + if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { + /* wrong base scope */ + SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n"); + continue; + } + if ((sctp_ifn == looked_at) && looked_at) { + /* already looked at this guy */ + SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n"); + continue; + } + num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, + dest_is_loop, dest_is_priv, fam); + SCTPDBG(SCTP_DEBUG_OUTPUT2, + "Found ifn:%p %d preferred source addresses\n", + ifn, num_preferred); + if (num_preferred == 0) { + /* None on this interface. */ + SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefered -- skipping to next\n"); + continue; + } + SCTPDBG(SCTP_DEBUG_OUTPUT2, + "num preferred:%d on interface:%p cur_addr_num:%d\n", + num_preferred, (void *)sctp_ifn, cur_addr_num); + + /* + * Ok we have num_eligible_addr set with how many we can + * use, this may vary from call to call due to addresses + * being deprecated etc.. + */ + if (cur_addr_num >= num_preferred) { + cur_addr_num = 0; + } + sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop, + dest_is_priv, cur_addr_num, fam, ro); + if (sifa == NULL) + continue; + if (net) { + net->indx_of_eligible_next_to_use = cur_addr_num + 1; + SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n", + cur_addr_num); + SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:"); + SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa); + SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:"); + SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa); + } + atomic_add_int(&sifa->refcount, 1); + return (sifa); + } +#ifdef INET +again_with_private_addresses_allowed: +#endif + /* plan_c: do we have an acceptable address on the emit interface */ + sifa = NULL; + SCTPDBG(SCTP_DEBUG_OUTPUT2,"Trying Plan C: find acceptable on interface\n"); + if (emit_ifn == NULL) { + SCTPDBG(SCTP_DEBUG_OUTPUT2,"Jump to Plan D - no emit_ifn\n"); + goto plan_d; + } + LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) { + SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa); +#if defined(__FreeBSD__) +#ifdef INET + if ((sctp_ifa->address.sa.sa_family == AF_INET) && + (prison_check_ip4(inp->ip_inp.inp.inp_cred, + &sctp_ifa->address.sin.sin_addr) != 0)) { + SCTPDBG(SCTP_DEBUG_OUTPUT2,"Jailed\n"); + continue; + } +#endif +#ifdef INET6 + if ((sctp_ifa->address.sa.sa_family == AF_INET6) && + (prison_check_ip6(inp->ip_inp.inp.inp_cred, + &sctp_ifa->address.sin6.sin6_addr) != 0)) { + SCTPDBG(SCTP_DEBUG_OUTPUT2,"Jailed\n"); + continue; + } +#endif +#endif + if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && + (non_asoc_addr_ok == 0)) { + SCTPDBG(SCTP_DEBUG_OUTPUT2,"Defer\n"); + continue; + } + sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, + dest_is_priv, fam); + if (sifa == NULL) { + SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n"); + continue; + } + if (stcb) { + if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) { + SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n"); + sifa = NULL; + continue; + } + if (((non_asoc_addr_ok == 0) && + (sctp_is_addr_restricted(stcb, sifa))) || + (non_asoc_addr_ok && + (sctp_is_addr_restricted(stcb, sifa)) && + (!sctp_is_addr_pending(stcb, sifa)))) { + /* + * It is restricted for some + * reason.. probably not yet added. + */ + SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its resticted\n"); + sifa = NULL; + continue; + } + } else { + SCTP_PRINTF("Stcb is null - no print\n"); + } + atomic_add_int(&sifa->refcount, 1); + goto out; + } + plan_d: + /* + * plan_d: We are in trouble. No preferred address on the emit + * interface. And not even a preferred address on all interfaces. + * Go out and see if we can find an acceptable address somewhere + * amongst all interfaces. + */ + SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at); + LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { + if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { + /* wrong base scope */ + continue; + } + LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { +#if defined(__FreeBSD__) +#ifdef INET + if ((sctp_ifa->address.sa.sa_family == AF_INET) && + (prison_check_ip4(inp->ip_inp.inp.inp_cred, + &sctp_ifa->address.sin.sin_addr) != 0)) { + continue; + } +#endif +#ifdef INET6 + if ((sctp_ifa->address.sa.sa_family == AF_INET6) && + (prison_check_ip6(inp->ip_inp.inp.inp_cred, + &sctp_ifa->address.sin6.sin6_addr) != 0)) { + continue; + } +#endif +#endif + if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && + (non_asoc_addr_ok == 0)) + continue; + sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, + dest_is_loop, + dest_is_priv, fam); + if (sifa == NULL) + continue; + if (stcb) { + if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) { + sifa = NULL; + continue; + } + if (((non_asoc_addr_ok == 0) && + (sctp_is_addr_restricted(stcb, sifa))) || + (non_asoc_addr_ok && + (sctp_is_addr_restricted(stcb, sifa)) && + (!sctp_is_addr_pending(stcb, sifa)))) { + /* + * It is restricted for some + * reason.. probably not yet added. + */ + sifa = NULL; + continue; + } + } + goto out; + } + } +#ifdef INET + if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) { + stcb->asoc.scope.ipv4_local_scope = 1; + retried = 1; + goto again_with_private_addresses_allowed; + } else if (retried == 1) { + stcb->asoc.scope.ipv4_local_scope = 0; + } +#endif +out: +#ifdef INET + if (sifa) { + if (retried == 1) { + LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { + if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { + /* wrong base scope */ + continue; + } + LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { + struct sctp_ifa *tmp_sifa; + +#if defined(__FreeBSD__) +#ifdef INET + if ((sctp_ifa->address.sa.sa_family == AF_INET) && + (prison_check_ip4(inp->ip_inp.inp.inp_cred, + &sctp_ifa->address.sin.sin_addr) != 0)) { + continue; + } +#endif +#ifdef INET6 + if ((sctp_ifa->address.sa.sa_family == AF_INET6) && + (prison_check_ip6(inp->ip_inp.inp.inp_cred, + &sctp_ifa->address.sin6.sin6_addr) != 0)) { + continue; + } +#endif +#endif + if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && + (non_asoc_addr_ok == 0)) + continue; + tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, + dest_is_loop, + dest_is_priv, fam); + if (tmp_sifa == NULL) { + continue; + } + if (tmp_sifa == sifa) { + continue; + } + if (stcb) { + if (sctp_is_address_in_scope(tmp_sifa, + &stcb->asoc.scope, 0) == 0) { + continue; + } + if (((non_asoc_addr_ok == 0) && + (sctp_is_addr_restricted(stcb, tmp_sifa))) || + (non_asoc_addr_ok && + (sctp_is_addr_restricted(stcb, tmp_sifa)) && + (!sctp_is_addr_pending(stcb, tmp_sifa)))) { + /* + * It is restricted for some + * reason.. probably not yet added. + */ + continue; + } + } + if ((tmp_sifa->address.sin.sin_family == AF_INET) && + (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) { + sctp_add_local_addr_restricted(stcb, tmp_sifa); + } + } + } + } + atomic_add_int(&sifa->refcount, 1); + } +#endif + return (sifa); +} + + + +/* tcb may be NULL */ +struct sctp_ifa * +sctp_source_address_selection(struct sctp_inpcb *inp, + struct sctp_tcb *stcb, + sctp_route_t *ro, + struct sctp_nets *net, + int non_asoc_addr_ok, uint32_t vrf_id) +{ + struct sctp_ifa *answer; + uint8_t dest_is_priv, dest_is_loop; + sa_family_t fam; +#ifdef INET + struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst; +#endif +#ifdef INET6 + struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst; +#endif + + /** + * Rules: - Find the route if needed, cache if I can. - Look at + * interface address in route, Is it in the bound list. If so we + * have the best source. - If not we must rotate amongst the + * addresses. + * + * Cavets and issues + * + * Do we need to pay attention to scope. We can have a private address + * or a global address we are sourcing or sending to. So if we draw + * it out + * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz + * For V4 + * ------------------------------------------ + * source * dest * result + * ----------------------------------------- + * <a> Private * Global * NAT + * ----------------------------------------- + * <b> Private * Private * No problem + * ----------------------------------------- + * <c> Global * Private * Huh, How will this work? + * ----------------------------------------- + * <d> Global * Global * No Problem + *------------------------------------------ + * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz + * For V6 + *------------------------------------------ + * source * dest * result + * ----------------------------------------- + * <a> Linklocal * Global * + * ----------------------------------------- + * <b> Linklocal * Linklocal * No problem + * ----------------------------------------- + * <c> Global * Linklocal * Huh, How will this work? + * ----------------------------------------- + * <d> Global * Global * No Problem + *------------------------------------------ + * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz + * + * And then we add to that what happens if there are multiple addresses + * assigned to an interface. Remember the ifa on a ifn is a linked + * list of addresses. So one interface can have more than one IP + * address. What happens if we have both a private and a global + * address? Do we then use context of destination to sort out which + * one is best? And what about NAT's sending P->G may get you a NAT + * translation, or should you select the G thats on the interface in + * preference. + * + * Decisions: + * + * - count the number of addresses on the interface. + * - if it is one, no problem except case <c>. + * For <a> we will assume a NAT out there. + * - if there are more than one, then we need to worry about scope P + * or G. We should prefer G -> G and P -> P if possible. + * Then as a secondary fall back to mixed types G->P being a last + * ditch one. + * - The above all works for bound all, but bound specific we need to + * use the same concept but instead only consider the bound + * addresses. If the bound set is NOT assigned to the interface then + * we must use rotation amongst the bound addresses.. + */ + if (ro->ro_rt == NULL) { + /* + * Need a route to cache. + */ + SCTP_RTALLOC(ro, vrf_id); + } + if (ro->ro_rt == NULL) { + return (NULL); + } +#if defined(__Userspace_os_Windows) + /* On Windows the sa_family is U_SHORT or ADDRESS_FAMILY */ + fam = (sa_family_t)ro->ro_dst.sa_family; +#else + fam = ro->ro_dst.sa_family; +#endif + dest_is_priv = dest_is_loop = 0; + /* Setup our scopes for the destination */ + switch (fam) { +#ifdef INET + case AF_INET: + /* Scope based on outbound address */ + if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { + dest_is_loop = 1; + if (net != NULL) { + /* mark it as local */ + net->addr_is_local = 1; + } + } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) { + dest_is_priv = 1; + } + break; +#endif +#ifdef INET6 + case AF_INET6: + /* Scope based on outbound address */ +#if defined(__Userspace_os_Windows) + if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { +#else + if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) || + SCTP_ROUTE_IS_REAL_LOOP(ro)) { +#endif + /* + * If the address is a loopback address, which + * consists of "::1" OR "fe80::1%lo0", we are loopback + * scope. But we don't use dest_is_priv (link local + * addresses). + */ + dest_is_loop = 1; + if (net != NULL) { + /* mark it as local */ + net->addr_is_local = 1; + } + } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { + dest_is_priv = 1; + } + break; +#endif + } + SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:"); + SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst); + SCTP_IPI_ADDR_RLOCK(); + if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { + /* + * Bound all case + */ + answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id, + dest_is_priv, dest_is_loop, + non_asoc_addr_ok, fam); + SCTP_IPI_ADDR_RUNLOCK(); + return (answer); + } + /* + * Subset bound case + */ + if (stcb) { + answer = sctp_choose_boundspecific_stcb(inp, stcb, ro, + vrf_id, dest_is_priv, + dest_is_loop, + non_asoc_addr_ok, fam); + } else { + answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id, + non_asoc_addr_ok, + dest_is_priv, + dest_is_loop, fam); + } + SCTP_IPI_ADDR_RUNLOCK(); + return (answer); +} + +static int +sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize) +{ +#if defined(__Userspace_os_Windows) + WSACMSGHDR cmh; +#else + struct cmsghdr cmh; +#endif + int tlen, at, found; + struct sctp_sndinfo sndinfo; + struct sctp_prinfo prinfo; + struct sctp_authinfo authinfo; + + tlen = SCTP_BUF_LEN(control); + at = 0; + found = 0; + /* + * Independent of how many mbufs, find the c_type inside the control + * structure and copy out the data. + */ + while (at < tlen) { + if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) { + /* There is not enough room for one more. */ + return (found); + } + m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh); + if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) { + /* We dont't have a complete CMSG header. */ + return (found); + } + if (((int)cmh.cmsg_len + at) > tlen) { + /* We don't have the complete CMSG. */ + return (found); + } + if ((cmh.cmsg_level == IPPROTO_SCTP) && + ((c_type == cmh.cmsg_type) || + ((c_type == SCTP_SNDRCV) && + ((cmh.cmsg_type == SCTP_SNDINFO) || + (cmh.cmsg_type == SCTP_PRINFO) || + (cmh.cmsg_type == SCTP_AUTHINFO))))) { + if (c_type == cmh.cmsg_type) { + if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < cpsize) { + return (found); + } + /* It is exactly what we want. Copy it out. */ + m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), cpsize, (caddr_t)data); + return (1); + } else { + struct sctp_sndrcvinfo *sndrcvinfo; + + sndrcvinfo = (struct sctp_sndrcvinfo *)data; + if (found == 0) { + if (cpsize < sizeof(struct sctp_sndrcvinfo)) { + return (found); + } + memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo)); + } + switch (cmh.cmsg_type) { + case SCTP_SNDINFO: + if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_sndinfo)) { + return (found); + } + m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo); + sndrcvinfo->sinfo_stream = sndinfo.snd_sid; + sndrcvinfo->sinfo_flags = sndinfo.snd_flags; + sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid; + sndrcvinfo->sinfo_context = sndinfo.snd_context; + sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id; + break; + case SCTP_PRINFO: + if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_prinfo)) { + return (found); + } + m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo); + if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) { + sndrcvinfo->sinfo_timetolive = prinfo.pr_value; + } else { + sndrcvinfo->sinfo_timetolive = 0; + } + sndrcvinfo->sinfo_flags |= prinfo.pr_policy; + break; + case SCTP_AUTHINFO: + if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_authinfo)) { + return (found); + } + m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo); + sndrcvinfo->sinfo_keynumber_valid = 1; + sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber; + break; + default: + return (found); + } + found = 1; + } + } + at += CMSG_ALIGN(cmh.cmsg_len); + } + return (found); +} + +static int +sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error) +{ +#if defined(__Userspace_os_Windows) + WSACMSGHDR cmh; +#else + struct cmsghdr cmh; +#endif + int tlen, at; + struct sctp_initmsg initmsg; +#ifdef INET + struct sockaddr_in sin; +#endif +#ifdef INET6 + struct sockaddr_in6 sin6; +#endif + + tlen = SCTP_BUF_LEN(control); + at = 0; + while (at < tlen) { + if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) { + /* There is not enough room for one more. */ + *error = EINVAL; + return (1); + } + m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh); + if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) { + /* We dont't have a complete CMSG header. */ + *error = EINVAL; + return (1); + } + if (((int)cmh.cmsg_len + at) > tlen) { + /* We don't have the complete CMSG. */ + *error = EINVAL; + return (1); + } + if (cmh.cmsg_level == IPPROTO_SCTP) { + switch (cmh.cmsg_type) { + case SCTP_INIT: + if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) { + *error = EINVAL; + return (1); + } + m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg); + if (initmsg.sinit_max_attempts) + stcb->asoc.max_init_times = initmsg.sinit_max_attempts; + if (initmsg.sinit_num_ostreams) + stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams; + if (initmsg.sinit_max_instreams) + stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams; + if (initmsg.sinit_max_init_timeo) + stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo; + if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) { + struct sctp_stream_out *tmp_str; + unsigned int i; +#if defined(SCTP_DETAILED_STR_STATS) + int j; +#endif + + /* Default is NOT correct */ + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n", + stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams); + SCTP_TCB_UNLOCK(stcb); + SCTP_MALLOC(tmp_str, + struct sctp_stream_out *, + (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)), + SCTP_M_STRMO); + SCTP_TCB_LOCK(stcb); + if (tmp_str != NULL) { + SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO); + stcb->asoc.strmout = tmp_str; + stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams; + } else { + stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt; + } + for (i = 0; i < stcb->asoc.streamoutcnt; i++) { + TAILQ_INIT(&stcb->asoc.strmout[i].outqueue); + stcb->asoc.strmout[i].chunks_on_queues = 0; + stcb->asoc.strmout[i].next_sequence_send = 0; +#if defined(SCTP_DETAILED_STR_STATS) + for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) { + stcb->asoc.strmout[i].abandoned_sent[j] = 0; + stcb->asoc.strmout[i].abandoned_unsent[j] = 0; + } +#else + stcb->asoc.strmout[i].abandoned_sent[0] = 0; + stcb->asoc.strmout[i].abandoned_unsent[0] = 0; +#endif + stcb->asoc.strmout[i].stream_no = i; + stcb->asoc.strmout[i].last_msg_incomplete = 0; + stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL); + } + } + break; +#ifdef INET + case SCTP_DSTADDRV4: + if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) { + *error = EINVAL; + return (1); + } + memset(&sin, 0, sizeof(struct sockaddr_in)); + sin.sin_family = AF_INET; +#ifdef HAVE_SIN_LEN + sin.sin_len = sizeof(struct sockaddr_in); +#endif + sin.sin_port = stcb->rport; + m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr); + if ((sin.sin_addr.s_addr == INADDR_ANY) || + (sin.sin_addr.s_addr == INADDR_BROADCAST) || + IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { + *error = EINVAL; + return (1); + } + if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, + SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) { + *error = ENOBUFS; + return (1); + } + break; +#endif +#ifdef INET6 + case SCTP_DSTADDRV6: + if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) { + *error = EINVAL; + return (1); + } + memset(&sin6, 0, sizeof(struct sockaddr_in6)); + sin6.sin6_family = AF_INET6; +#ifdef HAVE_SIN6_LEN + sin6.sin6_len = sizeof(struct sockaddr_in6); +#endif + sin6.sin6_port = stcb->rport; + m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr); + if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) || + IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { + *error = EINVAL; + return (1); + } +#ifdef INET + if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) { + in6_sin6_2_sin(&sin, &sin6); + if ((sin.sin_addr.s_addr == INADDR_ANY) || + (sin.sin_addr.s_addr == INADDR_BROADCAST) || + IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { + *error = EINVAL; + return (1); + } + if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, + SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) { + *error = ENOBUFS; + return (1); + } + } else +#endif + if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, + SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) { + *error = ENOBUFS; + return (1); + } + break; +#endif + default: + break; + } + } + at += CMSG_ALIGN(cmh.cmsg_len); + } + return (0); +} + +static struct sctp_tcb * +sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p, + uint16_t port, + struct mbuf *control, + struct sctp_nets **net_p, + int *error) +{ +#if defined(__Userspace_os_Windows) + WSACMSGHDR cmh; +#else + struct cmsghdr cmh; +#endif + int tlen, at; + struct sctp_tcb *stcb; + struct sockaddr *addr; +#ifdef INET + struct sockaddr_in sin; +#endif +#ifdef INET6 + struct sockaddr_in6 sin6; +#endif + + tlen = SCTP_BUF_LEN(control); + at = 0; + while (at < tlen) { + if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) { + /* There is not enough room for one more. */ + *error = EINVAL; + return (NULL); + } + m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh); + if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) { + /* We dont't have a complete CMSG header. */ + *error = EINVAL; + return (NULL); + } + if (((int)cmh.cmsg_len + at) > tlen) { + /* We don't have the complete CMSG. */ + *error = EINVAL; + return (NULL); + } + if (cmh.cmsg_level == IPPROTO_SCTP) { + switch (cmh.cmsg_type) { +#ifdef INET + case SCTP_DSTADDRV4: + if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) { + *error = EINVAL; + return (NULL); + } + memset(&sin, 0, sizeof(struct sockaddr_in)); + sin.sin_family = AF_INET; +#ifdef HAVE_SIN_LEN + sin.sin_len = sizeof(struct sockaddr_in); +#endif + sin.sin_port = port; + m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr); + addr = (struct sockaddr *)&sin; + break; +#endif +#ifdef INET6 + case SCTP_DSTADDRV6: + if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) { + *error = EINVAL; + return (NULL); + } + memset(&sin6, 0, sizeof(struct sockaddr_in6)); + sin6.sin6_family = AF_INET6; +#ifdef HAVE_SIN6_LEN + sin6.sin6_len = sizeof(struct sockaddr_in6); +#endif + sin6.sin6_port = port; + m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr); +#ifdef INET + if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) { + in6_sin6_2_sin(&sin, &sin6); + addr = (struct sockaddr *)&sin; + } else +#endif + addr = (struct sockaddr *)&sin6; + break; +#endif + default: + addr = NULL; + break; + } + if (addr) { + stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL); + if (stcb != NULL) { + return (stcb); + } + } + } + at += CMSG_ALIGN(cmh.cmsg_len); + } + return (NULL); +} + +static struct mbuf * +sctp_add_cookie(struct mbuf *init, int init_offset, + struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t **signature) +{ + struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret; + struct sctp_state_cookie *stc; + struct sctp_paramhdr *ph; + uint8_t *foo; + int sig_offset; + uint16_t cookie_sz; + + mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) + + sizeof(struct sctp_paramhdr)), 0, + M_NOWAIT, 1, MT_DATA); + if (mret == NULL) { + return (NULL); + } + copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT); + if (copy_init == NULL) { + sctp_m_freem(mret); + return (NULL); + } +#ifdef SCTP_MBUF_LOGGING + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { + sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY); + } +#endif + copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL, + M_NOWAIT); + if (copy_initack == NULL) { + sctp_m_freem(mret); + sctp_m_freem(copy_init); + return (NULL); + } +#ifdef SCTP_MBUF_LOGGING + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { + sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY); + } +#endif + /* easy side we just drop it on the end */ + ph = mtod(mret, struct sctp_paramhdr *); + SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) + + sizeof(struct sctp_paramhdr); + stc = (struct sctp_state_cookie *)((caddr_t)ph + + sizeof(struct sctp_paramhdr)); + ph->param_type = htons(SCTP_STATE_COOKIE); + ph->param_length = 0; /* fill in at the end */ + /* Fill in the stc cookie data */ + memcpy(stc, stc_in, sizeof(struct sctp_state_cookie)); + + /* tack the INIT and then the INIT-ACK onto the chain */ + cookie_sz = 0; + for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) { + cookie_sz += SCTP_BUF_LEN(m_at); + if (SCTP_BUF_NEXT(m_at) == NULL) { + SCTP_BUF_NEXT(m_at) = copy_init; + break; + } + } + for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) { + cookie_sz += SCTP_BUF_LEN(m_at); + if (SCTP_BUF_NEXT(m_at) == NULL) { + SCTP_BUF_NEXT(m_at) = copy_initack; + break; + } + } + for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) { + cookie_sz += SCTP_BUF_LEN(m_at); + if (SCTP_BUF_NEXT(m_at) == NULL) { + break; + } + } + sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA); + if (sig == NULL) { + /* no space, so free the entire chain */ + sctp_m_freem(mret); + return (NULL); + } + SCTP_BUF_LEN(sig) = 0; + SCTP_BUF_NEXT(m_at) = sig; + sig_offset = 0; + foo = (uint8_t *) (mtod(sig, caddr_t) + sig_offset); + memset(foo, 0, SCTP_SIGNATURE_SIZE); + *signature = foo; + SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE; + cookie_sz += SCTP_SIGNATURE_SIZE; + ph->param_length = htons(cookie_sz); + return (mret); +} + + +static uint8_t +sctp_get_ect(struct sctp_tcb *stcb) +{ + if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) { + return (SCTP_ECT0_BIT); + } else { + return (0); + } +} + +#if defined(INET) || defined(INET6) +static void +sctp_handle_no_route(struct sctp_tcb *stcb, + struct sctp_nets *net, + int so_locked) +{ + SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n"); + + if (net) { + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was "); + SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa); + if (net->dest_state & SCTP_ADDR_CONFIRMED) { + if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) { + SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net); + sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, + stcb, 0, + (void *)net, + so_locked); + net->dest_state &= ~SCTP_ADDR_REACHABLE; + net->dest_state &= ~SCTP_ADDR_PF; + } + } + if (stcb) { + if (net == stcb->asoc.primary_destination) { + /* need a new primary */ + struct sctp_nets *alt; + + alt = sctp_find_alternate_net(stcb, net, 0); + if (alt != net) { + if (stcb->asoc.alternate) { + sctp_free_remote_addr(stcb->asoc.alternate); + } + stcb->asoc.alternate = alt; + atomic_add_int(&stcb->asoc.alternate->ref_count, 1); + if (net->ro._s_addr) { + sctp_free_ifa(net->ro._s_addr); + net->ro._s_addr = NULL; + } + net->src_addr_selected = 0; + } + } + } + } +} +#endif + +static int +sctp_lowlevel_chunk_output(struct sctp_inpcb *inp, + struct sctp_tcb *stcb, /* may be NULL */ + struct sctp_nets *net, + struct sockaddr *to, + struct mbuf *m, + uint32_t auth_offset, + struct sctp_auth_chunk *auth, + uint16_t auth_keyid, + int nofragment_flag, + int ecn_ok, + int out_of_asoc_ok, + uint16_t src_port, + uint16_t dest_port, + uint32_t v_tag, + uint16_t port, + union sctp_sockstore *over_addr, +#if defined(__FreeBSD__) + uint8_t mflowtype, uint32_t mflowid, +#endif +#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) + int so_locked SCTP_UNUSED +#else + int so_locked +#endif + ) +/* nofragment_flag to tell if IP_DF should be set (IPv4 only) */ +{ + /** + * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header + * WITH an SCTPHDR but no IP header, endpoint inp and sa structure: + * - fill in the HMAC digest of any AUTH chunk in the packet. + * - calculate and fill in the SCTP checksum. + * - prepend an IP address header. + * - if boundall use INADDR_ANY. + * - if boundspecific do source address selection. + * - set fragmentation option for ipV4. + * - On return from IP output, check/adjust mtu size of output + * interface and smallest_mtu size as well. + */ + /* Will need ifdefs around this */ +#ifdef __Panda__ + pakhandle_type o_pak; +#endif + struct mbuf *newm; + struct sctphdr *sctphdr; + int packet_length; + int ret; +#if defined(INET) || defined(INET6) + uint32_t vrf_id; +#endif +#if defined(INET) || defined(INET6) +#if !defined(__Panda__) + struct mbuf *o_pak; +#endif + sctp_route_t *ro = NULL; + struct udphdr *udp = NULL; +#endif + uint8_t tos_value; +#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) + struct socket *so = NULL; +#endif + +#if defined(__APPLE__) + if (so_locked) { + sctp_lock_assert(SCTP_INP_SO(inp)); + SCTP_TCB_LOCK_ASSERT(stcb); + } else { + sctp_unlock_assert(SCTP_INP_SO(inp)); + } +#endif + if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) { + SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); + sctp_m_freem(m); + return (EFAULT); + } +#if defined(INET) || defined(INET6) + if (stcb) { + vrf_id = stcb->asoc.vrf_id; + } else { + vrf_id = inp->def_vrf_id; + } +#endif + /* fill in the HMAC digest for any AUTH chunk in the packet */ + if ((auth != NULL) && (stcb != NULL)) { + sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid); + } + + if (net) { + tos_value = net->dscp; + } else if (stcb) { + tos_value = stcb->asoc.default_dscp; + } else { + tos_value = inp->sctp_ep.default_dscp; + } + + switch (to->sa_family) { +#ifdef INET + case AF_INET: + { + struct ip *ip = NULL; + sctp_route_t iproute; + int len; + + len = sizeof(struct ip) + sizeof(struct sctphdr); + if (port) { + len += sizeof(struct udphdr); + } + newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA); + if (newm == NULL) { + sctp_m_freem(m); + SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + return (ENOMEM); + } + SCTP_ALIGN_TO_END(newm, len); + SCTP_BUF_LEN(newm) = len; + SCTP_BUF_NEXT(newm) = m; + m = newm; +#if defined(__FreeBSD__) + if (net != NULL) { + m->m_pkthdr.flowid = net->flowid; + M_HASHTYPE_SET(m, net->flowtype); + } else { + m->m_pkthdr.flowid = mflowid; + M_HASHTYPE_SET(m, mflowtype); + } +#endif + packet_length = sctp_calculate_len(m); + ip = mtod(m, struct ip *); + ip->ip_v = IPVERSION; + ip->ip_hl = (sizeof(struct ip) >> 2); + if (tos_value == 0) { + /* + * This means especially, that it is not set at the + * SCTP layer. So use the value from the IP layer. + */ +#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__Panda__) || defined(__Windows__) || defined(__Userspace__) + tos_value = inp->ip_inp.inp.inp_ip_tos; +#else + tos_value = inp->inp_ip_tos; +#endif + } + tos_value &= 0xfc; + if (ecn_ok) { + tos_value |= sctp_get_ect(stcb); + } + if ((nofragment_flag) && (port == 0)) { +#if defined(__FreeBSD__) +#if __FreeBSD_version >= 1000000 + ip->ip_off = htons(IP_DF); +#else + ip->ip_off = IP_DF; +#endif +#elif defined(WITH_CONVERT_IP_OFF) || defined(__APPLE__) || defined(__Userspace__) + ip->ip_off = IP_DF; +#else + ip->ip_off = htons(IP_DF); +#endif + } else { +#if defined(__FreeBSD__) && __FreeBSD_version >= 1000000 + ip->ip_off = htons(0); +#else + ip->ip_off = 0; +#endif + } +#if defined(__FreeBSD__) + /* FreeBSD has a function for ip_id's */ + ip->ip_id = ip_newid(); +#elif defined(RANDOM_IP_ID) + /* Apple has RANDOM_IP_ID switch */ + ip->ip_id = htons(ip_randomid()); +#elif defined(__Userspace__) + ip->ip_id = htons(SCTP_IP_ID(inp)++); +#else + ip->ip_id = SCTP_IP_ID(inp)++; +#endif + +#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__Panda__) || defined(__Windows__) || defined(__Userspace__) + ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl; +#else + ip->ip_ttl = inp->inp_ip_ttl; +#endif +#if defined(__FreeBSD__) && __FreeBSD_version >= 1000000 + ip->ip_len = htons(packet_length); +#else + ip->ip_len = packet_length; +#endif + ip->ip_tos = tos_value; + if (port) { + ip->ip_p = IPPROTO_UDP; + } else { + ip->ip_p = IPPROTO_SCTP; + } + ip->ip_sum = 0; + if (net == NULL) { + ro = &iproute; + memset(&iproute, 0, sizeof(iproute)); +#ifdef HAVE_SA_LEN + memcpy(&ro->ro_dst, to, to->sa_len); +#else + memcpy(&ro->ro_dst, to, sizeof(struct sockaddr_in)); +#endif + } else { + ro = (sctp_route_t *)&net->ro; + } + /* Now the address selection part */ + ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr; + + /* call the routine to select the src address */ + if (net && out_of_asoc_ok == 0) { + if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED|SCTP_ADDR_IFA_UNUSEABLE))) { + sctp_free_ifa(net->ro._s_addr); + net->ro._s_addr = NULL; + net->src_addr_selected = 0; + if (ro->ro_rt) { + RTFREE(ro->ro_rt); + ro->ro_rt = NULL; + } + } + if (net->src_addr_selected == 0) { + /* Cache the source address */ + net->ro._s_addr = sctp_source_address_selection(inp,stcb, + ro, net, 0, + vrf_id); + net->src_addr_selected = 1; + } + if (net->ro._s_addr == NULL) { + /* No route to host */ + net->src_addr_selected = 0; + sctp_handle_no_route(stcb, net, so_locked); + SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); + sctp_m_freem(m); + return (EHOSTUNREACH); + } + ip->ip_src = net->ro._s_addr->address.sin.sin_addr; + } else { + if (over_addr == NULL) { + struct sctp_ifa *_lsrc; + + _lsrc = sctp_source_address_selection(inp, stcb, ro, + net, + out_of_asoc_ok, + vrf_id); + if (_lsrc == NULL) { + sctp_handle_no_route(stcb, net, so_locked); + SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); + sctp_m_freem(m); + return (EHOSTUNREACH); + } + ip->ip_src = _lsrc->address.sin.sin_addr; + sctp_free_ifa(_lsrc); + } else { + ip->ip_src = over_addr->sin.sin_addr; + SCTP_RTALLOC(ro, vrf_id); + } + } + if (port) { + if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) { + sctp_handle_no_route(stcb, net, so_locked); + SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); + sctp_m_freem(m); + return (EHOSTUNREACH); + } + udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip)); + udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); + udp->uh_dport = port; + udp->uh_ulen = htons(packet_length - sizeof(struct ip)); +#if !defined(__Windows__) && !defined(__Userspace__) +#if defined(__FreeBSD__) && ((__FreeBSD_version > 803000 && __FreeBSD_version < 900000) || __FreeBSD_version > 900000) + if (V_udp_cksum) { + udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP)); + } else { + udp->uh_sum = 0; + } +#else + udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP)); +#endif +#else + udp->uh_sum = 0; +#endif + sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr)); + } else { + sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip)); + } + + sctphdr->src_port = src_port; + sctphdr->dest_port = dest_port; + sctphdr->v_tag = v_tag; + sctphdr->checksum = 0; + + /* + * If source address selection fails and we find no route + * then the ip_output should fail as well with a + * NO_ROUTE_TO_HOST type error. We probably should catch + * that somewhere and abort the association right away + * (assuming this is an INIT being sent). + */ + if (ro->ro_rt == NULL) { + /* + * src addr selection failed to find a route (or + * valid source addr), so we can't get there from + * here (yet)! + */ + sctp_handle_no_route(stcb, net, so_locked); + SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); + sctp_m_freem(m); + return (EHOSTUNREACH); + } + if (ro != &iproute) { + memcpy(&iproute, ro, sizeof(*ro)); + } + SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n", + (uint32_t) (ntohl(ip->ip_src.s_addr))); + SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n", + (uint32_t)(ntohl(ip->ip_dst.s_addr))); + SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n", + (void *)ro->ro_rt); + + if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { + /* failed to prepend data, give up */ + SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + sctp_m_freem(m); + return (ENOMEM); + } + SCTP_ATTACH_CHAIN(o_pak, m, packet_length); + if (port) { +#if defined(SCTP_WITH_NO_CSUM) + SCTP_STAT_INCR(sctps_sendnocrc); +#else + sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr)); + SCTP_STAT_INCR(sctps_sendswcrc); +#endif +#if defined(__FreeBSD__) && ((__FreeBSD_version > 803000 && __FreeBSD_version < 900000) || __FreeBSD_version > 900000) + if (V_udp_cksum) { + SCTP_ENABLE_UDP_CSUM(o_pak); + } +#else + SCTP_ENABLE_UDP_CSUM(o_pak); +#endif + } else { +#if defined(SCTP_WITH_NO_CSUM) + SCTP_STAT_INCR(sctps_sendnocrc); +#else +#if defined(__FreeBSD__) && __FreeBSD_version >= 800000 + m->m_pkthdr.csum_flags = CSUM_SCTP; + m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); + SCTP_STAT_INCR(sctps_sendhwcrc); +#else + if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) && + (stcb) && (stcb->asoc.scope.loopback_scope))) { + sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip)); + SCTP_STAT_INCR(sctps_sendswcrc); + } else { + SCTP_STAT_INCR(sctps_sendnocrc); + } +#endif +#endif + } +#ifdef SCTP_PACKET_LOGGING + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) + sctp_packet_log(o_pak); +#endif + /* send it out. table id is taken from stcb */ +#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) + if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { + so = SCTP_INP_SO(inp); + SCTP_SOCKET_UNLOCK(so, 0); + } +#endif + SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id); +#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) + if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { + atomic_add_int(&stcb->asoc.refcnt, 1); + SCTP_TCB_UNLOCK(stcb); + SCTP_SOCKET_LOCK(so, 0); + SCTP_TCB_LOCK(stcb); + atomic_subtract_int(&stcb->asoc.refcnt, 1); + } +#endif + SCTP_STAT_INCR(sctps_sendpackets); + SCTP_STAT_INCR_COUNTER64(sctps_outpackets); + if (ret) + SCTP_STAT_INCR(sctps_senderrors); + + SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret); + if (net == NULL) { + /* free tempy routes */ +#if defined(__FreeBSD__) && __FreeBSD_version > 901000 + RO_RTFREE(ro); +#else + if (ro->ro_rt) { + RTFREE(ro->ro_rt); + ro->ro_rt = NULL; + } +#endif + } else { + /* PMTU check versus smallest asoc MTU goes here */ + if ((ro->ro_rt != NULL) && + (net->ro._s_addr)) { + uint32_t mtu; + mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt); + if (net->port) { + mtu -= sizeof(struct udphdr); + } + if (mtu && (stcb->asoc.smallest_mtu > mtu)) { + sctp_mtu_size_reset(inp, &stcb->asoc, mtu); + net->mtu = mtu; + } + } else if (ro->ro_rt == NULL) { + /* route was freed */ + if (net->ro._s_addr && + net->src_addr_selected) { + sctp_free_ifa(net->ro._s_addr); + net->ro._s_addr = NULL; + } + net->src_addr_selected = 0; + } + } + return (ret); + } +#endif +#ifdef INET6 + case AF_INET6: + { + uint32_t flowlabel, flowinfo; + struct ip6_hdr *ip6h; + struct route_in6 ip6route; +#if !(defined(__Panda__) || defined(__Userspace__)) + struct ifnet *ifp; +#endif + struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp; + int prev_scope = 0; +#ifdef SCTP_EMBEDDED_V6_SCOPE + struct sockaddr_in6 lsa6_storage; + int error; +#endif + u_short prev_port = 0; + int len; + + if (net) { + flowlabel = net->flowlabel; + } else if (stcb) { + flowlabel = stcb->asoc.default_flowlabel; + } else { + flowlabel = inp->sctp_ep.default_flowlabel; + } + if (flowlabel == 0) { + /* + * This means especially, that it is not set at the + * SCTP layer. So use the value from the IP layer. + */ +#if defined(__APPLE__) && (!defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION)) + flowlabel = ntohl(inp->ip_inp.inp.inp_flow); +#else + flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo); +#endif + } + flowlabel &= 0x000fffff; + len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr); + if (port) { + len += sizeof(struct udphdr); + } + newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA); + if (newm == NULL) { + sctp_m_freem(m); + SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + return (ENOMEM); + } + SCTP_ALIGN_TO_END(newm, len); + SCTP_BUF_LEN(newm) = len; + SCTP_BUF_NEXT(newm) = m; + m = newm; +#if defined(__FreeBSD__) + if (net != NULL) { + m->m_pkthdr.flowid = net->flowid; + M_HASHTYPE_SET(m, net->flowtype); + } else { + m->m_pkthdr.flowid = mflowid; + M_HASHTYPE_SET(m, mflowtype); + } +#endif + packet_length = sctp_calculate_len(m); + + ip6h = mtod(m, struct ip6_hdr *); + /* protect *sin6 from overwrite */ + sin6 = (struct sockaddr_in6 *)to; + tmp = *sin6; + sin6 = &tmp; + +#ifdef SCTP_EMBEDDED_V6_SCOPE + /* KAME hack: embed scopeid */ +#if defined(__APPLE__) +#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) + if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL) != 0) +#else + if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL, NULL) != 0) +#endif +#elif defined(SCTP_KAME) + if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) +#else + if (in6_embedscope(&sin6->sin6_addr, sin6) != 0) +#endif + { + SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + return (EINVAL); + } +#endif /* SCTP_EMBEDDED_V6_SCOPE */ + if (net == NULL) { + memset(&ip6route, 0, sizeof(ip6route)); + ro = (sctp_route_t *)&ip6route; +#ifdef HAVE_SIN6_LEN + memcpy(&ro->ro_dst, sin6, sin6->sin6_len); +#else + memcpy(&ro->ro_dst, sin6, sizeof(struct sockaddr_in6)); +#endif + } else { + ro = (sctp_route_t *)&net->ro; + } + /* + * We assume here that inp_flow is in host byte order within + * the TCB! + */ + if (tos_value == 0) { + /* + * This means especially, that it is not set at the + * SCTP layer. So use the value from the IP layer. + */ +#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__Panda__) || defined(__Windows__) || defined(__Userspace__) +#if defined(__APPLE__) && (!defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION)) + tos_value = (ntohl(inp->ip_inp.inp.inp_flow) >> 20) & 0xff; +#else + tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff; +#endif +#endif + } + tos_value &= 0xfc; + if (ecn_ok) { + tos_value |= sctp_get_ect(stcb); + } + flowinfo = 0x06; + flowinfo <<= 8; + flowinfo |= tos_value; + flowinfo <<= 20; + flowinfo |= flowlabel; + ip6h->ip6_flow = htonl(flowinfo); + if (port) { + ip6h->ip6_nxt = IPPROTO_UDP; + } else { + ip6h->ip6_nxt = IPPROTO_SCTP; + } + ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr)); + ip6h->ip6_dst = sin6->sin6_addr; + + /* + * Add SRC address selection here: we can only reuse to a + * limited degree the kame src-addr-sel, since we can try + * their selection but it may not be bound. + */ + bzero(&lsa6_tmp, sizeof(lsa6_tmp)); + lsa6_tmp.sin6_family = AF_INET6; +#ifdef HAVE_SIN6_LEN + lsa6_tmp.sin6_len = sizeof(lsa6_tmp); +#endif + lsa6 = &lsa6_tmp; + if (net && out_of_asoc_ok == 0) { + if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED|SCTP_ADDR_IFA_UNUSEABLE))) { + sctp_free_ifa(net->ro._s_addr); + net->ro._s_addr = NULL; + net->src_addr_selected = 0; + if (ro->ro_rt) { + RTFREE(ro->ro_rt); + ro->ro_rt = NULL; + } + } + if (net->src_addr_selected == 0) { +#ifdef SCTP_EMBEDDED_V6_SCOPE + sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; + /* KAME hack: embed scopeid */ +#if defined(__APPLE__) +#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) + if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL) != 0) +#else + if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL, NULL) != 0) +#endif +#elif defined(SCTP_KAME) + if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) +#else + if (in6_embedscope(&sin6->sin6_addr, sin6) != 0) +#endif + { + SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + return (EINVAL); + } +#endif /* SCTP_EMBEDDED_V6_SCOPE */ + /* Cache the source address */ + net->ro._s_addr = sctp_source_address_selection(inp, + stcb, + ro, + net, + 0, + vrf_id); +#ifdef SCTP_EMBEDDED_V6_SCOPE +#ifdef SCTP_KAME + (void)sa6_recoverscope(sin6); +#else + (void)in6_recoverscope(sin6, &sin6->sin6_addr, NULL); +#endif /* SCTP_KAME */ +#endif /* SCTP_EMBEDDED_V6_SCOPE */ + net->src_addr_selected = 1; + } + if (net->ro._s_addr == NULL) { + SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n"); + net->src_addr_selected = 0; + sctp_handle_no_route(stcb, net, so_locked); + SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); + sctp_m_freem(m); + return (EHOSTUNREACH); + } + lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr; + } else { +#ifdef SCTP_EMBEDDED_V6_SCOPE + sin6 = (struct sockaddr_in6 *)&ro->ro_dst; + /* KAME hack: embed scopeid */ +#if defined(__APPLE__) +#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) + if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL) != 0) +#else + if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL, NULL) != 0) +#endif +#elif defined(SCTP_KAME) + if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) +#else + if (in6_embedscope(&sin6->sin6_addr, sin6) != 0) +#endif + { + SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + return (EINVAL); + } +#endif /* SCTP_EMBEDDED_V6_SCOPE */ + if (over_addr == NULL) { + struct sctp_ifa *_lsrc; + + _lsrc = sctp_source_address_selection(inp, stcb, ro, + net, + out_of_asoc_ok, + vrf_id); + if (_lsrc == NULL) { + sctp_handle_no_route(stcb, net, so_locked); + SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); + sctp_m_freem(m); + return (EHOSTUNREACH); + } + lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr; + sctp_free_ifa(_lsrc); + } else { + lsa6->sin6_addr = over_addr->sin6.sin6_addr; + SCTP_RTALLOC(ro, vrf_id); + } +#ifdef SCTP_EMBEDDED_V6_SCOPE +#ifdef SCTP_KAME + (void)sa6_recoverscope(sin6); +#else + (void)in6_recoverscope(sin6, &sin6->sin6_addr, NULL); +#endif /* SCTP_KAME */ +#endif /* SCTP_EMBEDDED_V6_SCOPE */ + } + lsa6->sin6_port = inp->sctp_lport; + + if (ro->ro_rt == NULL) { + /* + * src addr selection failed to find a route (or + * valid source addr), so we can't get there from + * here! + */ + sctp_handle_no_route(stcb, net, so_locked); + SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); + sctp_m_freem(m); + return (EHOSTUNREACH); + } +#ifndef SCOPEDROUTING +#ifdef SCTP_EMBEDDED_V6_SCOPE + /* + * XXX: sa6 may not have a valid sin6_scope_id in the + * non-SCOPEDROUTING case. + */ + bzero(&lsa6_storage, sizeof(lsa6_storage)); + lsa6_storage.sin6_family = AF_INET6; +#ifdef HAVE_SIN6_LEN + lsa6_storage.sin6_len = sizeof(lsa6_storage); +#endif +#ifdef SCTP_KAME + lsa6_storage.sin6_addr = lsa6->sin6_addr; + if ((error = sa6_recoverscope(&lsa6_storage)) != 0) { +#else + if ((error = in6_recoverscope(&lsa6_storage, &lsa6->sin6_addr, + NULL)) != 0) { +#endif /* SCTP_KAME */ + SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error); + sctp_m_freem(m); + return (error); + } + /* XXX */ + lsa6_storage.sin6_addr = lsa6->sin6_addr; + lsa6_storage.sin6_port = inp->sctp_lport; + lsa6 = &lsa6_storage; +#endif /* SCTP_EMBEDDED_V6_SCOPE */ +#endif /* SCOPEDROUTING */ + ip6h->ip6_src = lsa6->sin6_addr; + + if (port) { + if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) { + sctp_handle_no_route(stcb, net, so_locked); + SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); + sctp_m_freem(m); + return (EHOSTUNREACH); + } + udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr)); + udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); + udp->uh_dport = port; + udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr)); + udp->uh_sum = 0; + sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr)); + } else { + sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr)); + } + + sctphdr->src_port = src_port; + sctphdr->dest_port = dest_port; + sctphdr->v_tag = v_tag; + sctphdr->checksum = 0; + + /* + * We set the hop limit now since there is a good chance + * that our ro pointer is now filled + */ + ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro); +#if !(defined(__Panda__) || defined(__Userspace__)) + ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); +#endif + +#ifdef SCTP_DEBUG + /* Copy to be sure something bad is not happening */ + sin6->sin6_addr = ip6h->ip6_dst; + lsa6->sin6_addr = ip6h->ip6_src; +#endif + + SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n"); + SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: "); + SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6); + SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: "); + SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6); + if (net) { + sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; + /* preserve the port and scope for link local send */ + prev_scope = sin6->sin6_scope_id; + prev_port = sin6->sin6_port; + } + + if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { + /* failed to prepend data, give up */ + sctp_m_freem(m); + SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + return (ENOMEM); + } + SCTP_ATTACH_CHAIN(o_pak, m, packet_length); + if (port) { +#if defined(SCTP_WITH_NO_CSUM) + SCTP_STAT_INCR(sctps_sendnocrc); +#else + sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr)); + SCTP_STAT_INCR(sctps_sendswcrc); +#endif +#if defined(__Windows__) + udp->uh_sum = 0; +#elif !defined(__Userspace__) + if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) { + udp->uh_sum = 0xffff; + } +#endif + } else { +#if defined(SCTP_WITH_NO_CSUM) + SCTP_STAT_INCR(sctps_sendnocrc); +#else +#if defined(__FreeBSD__) && __FreeBSD_version >= 800000 +#if __FreeBSD_version < 900000 + sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr)); + SCTP_STAT_INCR(sctps_sendswcrc); +#else +#if __FreeBSD_version > 901000 + m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6; +#else + m->m_pkthdr.csum_flags = CSUM_SCTP; +#endif + m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); + SCTP_STAT_INCR(sctps_sendhwcrc); +#endif +#else + if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) && + (stcb) && (stcb->asoc.scope.loopback_scope))) { + sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr)); + SCTP_STAT_INCR(sctps_sendswcrc); + } else { + SCTP_STAT_INCR(sctps_sendnocrc); + } +#endif +#endif + } + /* send it out. table id is taken from stcb */ +#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) + if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { + so = SCTP_INP_SO(inp); + SCTP_SOCKET_UNLOCK(so, 0); + } +#endif +#ifdef SCTP_PACKET_LOGGING + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) + sctp_packet_log(o_pak); +#endif +#if !(defined(__Panda__) || defined(__Userspace__)) + SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id); +#else + SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, NULL, stcb, vrf_id); +#endif +#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) + if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { + atomic_add_int(&stcb->asoc.refcnt, 1); + SCTP_TCB_UNLOCK(stcb); + SCTP_SOCKET_LOCK(so, 0); + SCTP_TCB_LOCK(stcb); + atomic_subtract_int(&stcb->asoc.refcnt, 1); + } +#endif + if (net) { + /* for link local this must be done */ + sin6->sin6_scope_id = prev_scope; + sin6->sin6_port = prev_port; + } + SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret); + SCTP_STAT_INCR(sctps_sendpackets); + SCTP_STAT_INCR_COUNTER64(sctps_outpackets); + if (ret) { + SCTP_STAT_INCR(sctps_senderrors); + } + if (net == NULL) { + /* Now if we had a temp route free it */ +#if defined(__FreeBSD__) && __FreeBSD_version > 901000 + RO_RTFREE(ro); +#else + if (ro->ro_rt) { + RTFREE(ro->ro_rt); + ro->ro_rt = NULL; + } +#endif + } else { + /* PMTU check versus smallest asoc MTU goes here */ + if (ro->ro_rt == NULL) { + /* Route was freed */ + if (net->ro._s_addr && + net->src_addr_selected) { + sctp_free_ifa(net->ro._s_addr); + net->ro._s_addr = NULL; + } + net->src_addr_selected = 0; + } + if ((ro->ro_rt != NULL) && + (net->ro._s_addr)) { + uint32_t mtu; + mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt); + if (mtu && + (stcb->asoc.smallest_mtu > mtu)) { + sctp_mtu_size_reset(inp, &stcb->asoc, mtu); + net->mtu = mtu; + if (net->port) { + net->mtu -= sizeof(struct udphdr); + } + } + } +#if !defined(__Panda__) && !defined(__Userspace__) + else if (ifp) { +#if defined(__Windows__) +#define ND_IFINFO(ifp) (ifp) +#define linkmtu if_mtu +#endif + if (ND_IFINFO(ifp)->linkmtu && + (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) { + sctp_mtu_size_reset(inp, + &stcb->asoc, + ND_IFINFO(ifp)->linkmtu); + } + } +#endif + } + return (ret); + } +#endif +#if defined(__Userspace__) + case AF_CONN: + { + char *buffer; + struct sockaddr_conn *sconn; + int len; + + sconn = (struct sockaddr_conn *)to; + len = sizeof(struct sctphdr); + newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA); + if (newm == NULL) { + sctp_m_freem(m); + SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + return (ENOMEM); + } + SCTP_ALIGN_TO_END(newm, len); + SCTP_BUF_LEN(newm) = len; + SCTP_BUF_NEXT(newm) = m; + m = newm; + packet_length = sctp_calculate_len(m); + sctphdr = mtod(m, struct sctphdr *); + sctphdr->src_port = src_port; + sctphdr->dest_port = dest_port; + sctphdr->v_tag = v_tag; + sctphdr->checksum = 0; +#if defined(SCTP_WITH_NO_CSUM) + SCTP_STAT_INCR(sctps_sendnocrc); +#else + sctphdr->checksum = sctp_calculate_cksum(m, 0); + SCTP_STAT_INCR(sctps_sendswcrc); +#endif + if (tos_value == 0) { + tos_value = inp->ip_inp.inp.inp_ip_tos; + } + tos_value &= 0xfc; + if (ecn_ok) { + tos_value |= sctp_get_ect(stcb); + } + /* Don't alloc/free for each packet */ + if ((buffer = malloc(packet_length)) != NULL) { + m_copydata(m, 0, packet_length, buffer); + ret = SCTP_BASE_VAR(conn_output)(sconn->sconn_addr, buffer, packet_length, tos_value, nofragment_flag); + free(buffer); + } else { + ret = ENOMEM; + } + sctp_m_freem(m); + return (ret); + } +#endif + default: + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n", + ((struct sockaddr *)to)->sa_family); + sctp_m_freem(m); + SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); + return (EFAULT); + } +} + + +void +sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked +#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) + SCTP_UNUSED +#endif + ) +{ + struct mbuf *m, *m_last; + struct sctp_nets *net; + struct sctp_init_chunk *init; + struct sctp_supported_addr_param *sup_addr; + struct sctp_adaptation_layer_indication *ali; + struct sctp_supported_chunk_types_param *pr_supported; + struct sctp_paramhdr *ph; + int cnt_inits_to = 0; + int ret; + uint16_t num_ext, chunk_len, padding_len, parameter_len; + +#if defined(__APPLE__) + if (so_locked) { + sctp_lock_assert(SCTP_INP_SO(inp)); + } else { + sctp_unlock_assert(SCTP_INP_SO(inp)); + } +#endif + /* INIT's always go to the primary (and usually ONLY address) */ + net = stcb->asoc.primary_destination; + if (net == NULL) { + net = TAILQ_FIRST(&stcb->asoc.nets); + if (net == NULL) { + /* TSNH */ + return; + } + /* we confirm any address we send an INIT to */ + net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; + (void)sctp_set_primary_addr(stcb, NULL, net); + } else { + /* we confirm any address we send an INIT to */ + net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; + } + SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n"); +#ifdef INET6 + if (net->ro._l_addr.sa.sa_family == AF_INET6) { + /* + * special hook, if we are sending to link local it will not + * show up in our private address count. + */ + if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr)) + cnt_inits_to = 1; + } +#endif + if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { + /* This case should not happen */ + SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n"); + return; + } + /* start the INIT timer */ + sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net); + + m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA); + if (m == NULL) { + /* No memory, INIT timer will re-attempt. */ + SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n"); + return; + } + chunk_len = (uint16_t)sizeof(struct sctp_init_chunk); + padding_len = 0; + /* Now lets put the chunk header in place */ + init = mtod(m, struct sctp_init_chunk *); + /* now the chunk header */ + init->ch.chunk_type = SCTP_INITIATION; + init->ch.chunk_flags = 0; + /* fill in later from mbuf we build */ + init->ch.chunk_length = 0; + /* place in my tag */ + init->init.initiate_tag = htonl(stcb->asoc.my_vtag); + /* set up some of the credits. */ + init->init.a_rwnd = htonl(max(inp->sctp_socket?SCTP_SB_LIMIT_RCV(inp->sctp_socket):0, + SCTP_MINIMAL_RWND)); + init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams); + init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams); + init->init.initial_tsn = htonl(stcb->asoc.init_seq_number); + + /* Adaptation layer indication parameter */ + if (inp->sctp_ep.adaptation_layer_indicator_provided) { + parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication); + ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t) + chunk_len); + ali->ph.param_type = htons(SCTP_ULP_ADAPTATION); + ali->ph.param_length = htons(parameter_len); + ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator); + chunk_len += parameter_len; + } + + /* ECN parameter */ + if (stcb->asoc.ecn_supported == 1) { + parameter_len = (uint16_t)sizeof(struct sctp_paramhdr); + ph = (struct sctp_paramhdr *)(mtod(m, caddr_t) + chunk_len); + ph->param_type = htons(SCTP_ECN_CAPABLE); + ph->param_length = htons(parameter_len); + chunk_len += parameter_len; + } + + /* PR-SCTP supported parameter */ + if (stcb->asoc.prsctp_supported == 1) { + parameter_len = (uint16_t)sizeof(struct sctp_paramhdr); + ph = (struct sctp_paramhdr *)(mtod(m, caddr_t) + chunk_len); + ph->param_type = htons(SCTP_PRSCTP_SUPPORTED); + ph->param_length = htons(parameter_len); + chunk_len += parameter_len; + } + + /* Add NAT friendly parameter. */ + if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) { + parameter_len = (uint16_t)sizeof(struct sctp_paramhdr); + ph = (struct sctp_paramhdr *)(mtod(m, caddr_t) + chunk_len); + ph->param_type = htons(SCTP_HAS_NAT_SUPPORT); + ph->param_length = htons(parameter_len); + chunk_len += parameter_len; + } + + /* And now tell the peer which extensions we support */ + num_ext = 0; + pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t) + chunk_len); + if (stcb->asoc.prsctp_supported == 1) { + pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN; + } + if (stcb->asoc.auth_supported == 1) { + pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION; + } + if (stcb->asoc.asconf_supported == 1) { + pr_supported->chunk_types[num_ext++] = SCTP_ASCONF; + pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK; + } + if (stcb->asoc.reconfig_supported == 1) { + pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET; + } + if (stcb->asoc.nrsack_supported == 1) { + pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK; + } + if (stcb->asoc.pktdrop_supported == 1) { + pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED; + } + if (num_ext > 0) { + parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext; + pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT); + pr_supported->ph.param_length = htons(parameter_len); + padding_len = SCTP_SIZE32(parameter_len) - parameter_len; + chunk_len += parameter_len; + } + /* add authentication parameters */ + if (stcb->asoc.auth_supported) { + /* attach RANDOM parameter, if available */ + if (stcb->asoc.authinfo.random != NULL) { + struct sctp_auth_random *randp; + + if (padding_len > 0) { + memset(mtod(m, caddr_t) + chunk_len, 0, padding_len); + chunk_len += padding_len; + padding_len = 0; + } + randp = (struct sctp_auth_random *)(mtod(m, caddr_t) + chunk_len); + parameter_len = (uint16_t)sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len; + /* random key already contains the header */ + memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len); + padding_len = SCTP_SIZE32(parameter_len) - parameter_len; + chunk_len += parameter_len; + } + /* add HMAC_ALGO parameter */ + if (stcb->asoc.local_hmacs != NULL) { + struct sctp_auth_hmac_algo *hmacs; + + if (padding_len > 0) { + memset(mtod(m, caddr_t) + chunk_len, 0, padding_len); + chunk_len += padding_len; + padding_len = 0; + } + hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t) + chunk_len); + parameter_len = (uint16_t)(sizeof(struct sctp_auth_hmac_algo) + + stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t)); + hmacs->ph.param_type = htons(SCTP_HMAC_LIST); + hmacs->ph.param_length = htons(parameter_len); + sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *)hmacs->hmac_ids); + padding_len = SCTP_SIZE32(parameter_len) - parameter_len; + chunk_len += parameter_len; + } + /* add CHUNKS parameter */ + if (stcb->asoc.local_auth_chunks != NULL) { + struct sctp_auth_chunk_list *chunks; + + if (padding_len > 0) { + memset(mtod(m, caddr_t) + chunk_len, 0, padding_len); + chunk_len += padding_len; + padding_len = 0; + } + chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t) + chunk_len); + parameter_len = (uint16_t)(sizeof(struct sctp_auth_chunk_list) + + sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks)); + chunks->ph.param_type = htons(SCTP_CHUNK_LIST); + chunks->ph.param_length = htons(parameter_len); + sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types); + padding_len = SCTP_SIZE32(parameter_len) - parameter_len; + chunk_len += parameter_len; + } + } + + /* now any cookie time extensions */ + if (stcb->asoc.cookie_preserve_req) { + struct sctp_cookie_perserve_param *cookie_preserve; + + if (padding_len > 0) { + memset(mtod(m, caddr_t) + chunk_len, 0, padding_len); + chunk_len += padding_len; + padding_len = 0; + } + parameter_len = (uint16_t)sizeof(struct sctp_cookie_perserve_param); + cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t) + chunk_len); + cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE); + cookie_preserve->ph.param_length = htons(parameter_len); + cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req); + stcb->asoc.cookie_preserve_req = 0; + chunk_len += parameter_len; + } + + if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) { + uint8_t i; + + if (padding_len > 0) { + memset(mtod(m, caddr_t) + chunk_len, 0, padding_len); + chunk_len += padding_len; + padding_len = 0; + } + parameter_len = (uint16_t)sizeof(struct sctp_paramhdr); + if (stcb->asoc.scope.ipv4_addr_legal) { + parameter_len += (uint16_t)sizeof(uint16_t); + } + if (stcb->asoc.scope.ipv6_addr_legal) { + parameter_len += (uint16_t)sizeof(uint16_t); + } + sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t) + chunk_len); + sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE); + sup_addr->ph.param_length = htons(parameter_len); + i = 0; + if (stcb->asoc.scope.ipv4_addr_legal) { + sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS); + } + if (stcb->asoc.scope.ipv6_addr_legal) { + sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS); + } + padding_len = 4 - 2 * i; + chunk_len += parameter_len; + } + + SCTP_BUF_LEN(m) = chunk_len; + /* now the addresses */ + /* To optimize this we could put the scoping stuff + * into a structure and remove the individual uint8's from + * the assoc structure. Then we could just sifa in the + * address within the stcb. But for now this is a quick + * hack to get the address stuff teased apart. + */ + m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope, + m, cnt_inits_to, + &padding_len, &chunk_len); + + init->ch.chunk_length = htons(chunk_len); + if (padding_len > 0) { + if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) { + sctp_m_freem(m); + return; + } + } + SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n"); + ret = sctp_lowlevel_chunk_output(inp, stcb, net, + (struct sockaddr *)&net->ro._l_addr, + m, 0, NULL, 0, 0, 0, 0, + inp->sctp_lport, stcb->rport, htonl(0), + net->port, NULL, +#if defined(__FreeBSD__) + 0, 0, +#endif + so_locked); + SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret); + SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); + (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); +} + +struct mbuf * +sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt, + int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly) +{ + /* + * Given a mbuf containing an INIT or INIT-ACK with the param_offset + * being equal to the beginning of the params i.e. (iphlen + + * sizeof(struct sctp_init_msg) parse through the parameters to the + * end of the mbuf verifying that all parameters are known. + * + * For unknown parameters build and return a mbuf with + * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop + * processing this chunk stop, and set *abort_processing to 1. + * + * By having param_offset be pre-set to where parameters begin it is + * hoped that this routine may be reused in the future by new + * features. + */ + struct sctp_paramhdr *phdr, params; + + struct mbuf *mat, *op_err; + char tempbuf[SCTP_PARAM_BUFFER_SIZE]; + int at, limit, pad_needed; + uint16_t ptype, plen, padded_size; + int err_at; + + *abort_processing = 0; + mat = in_initpkt; + err_at = 0; + limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk); + at = param_offset; + op_err = NULL; + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n"); + phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params)); + while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) { + ptype = ntohs(phdr->param_type); + plen = ntohs(phdr->param_length); + if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) { + /* wacked parameter */ + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen); + goto invalid_size; + } + limit -= SCTP_SIZE32(plen); + /*- + * All parameters for all chunks that we know/understand are + * listed here. We process them other places and make + * appropriate stop actions per the upper bits. However this + * is the generic routine processor's can call to get back + * an operr.. to either incorporate (init-ack) or send. + */ + padded_size = SCTP_SIZE32(plen); + switch (ptype) { + /* Param's with variable size */ + case SCTP_HEARTBEAT_INFO: + case SCTP_STATE_COOKIE: + case SCTP_UNRECOG_PARAM: + case SCTP_ERROR_CAUSE_IND: + /* ok skip fwd */ + at += padded_size; + break; + /* Param's with variable size within a range */ + case SCTP_CHUNK_LIST: + case SCTP_SUPPORTED_CHUNK_EXT: + if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) { + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen); + goto invalid_size; + } + at += padded_size; + break; + case SCTP_SUPPORTED_ADDRTYPE: + if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) { + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen); + goto invalid_size; + } + at += padded_size; + break; + case SCTP_RANDOM: + if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) { + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen); + goto invalid_size; + } + at += padded_size; + break; + case SCTP_SET_PRIM_ADDR: + case SCTP_DEL_IP_ADDRESS: + case SCTP_ADD_IP_ADDRESS: + if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) && + (padded_size != sizeof(struct sctp_asconf_addr_param))) { + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen); + goto invalid_size; + } + at += padded_size; + break; + /* Param's with a fixed size */ + case SCTP_IPV4_ADDRESS: + if (padded_size != sizeof(struct sctp_ipv4addr_param)) { + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen); + goto invalid_size; + } + at += padded_size; + break; + case SCTP_IPV6_ADDRESS: + if (padded_size != sizeof(struct sctp_ipv6addr_param)) { + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen); + goto invalid_size; + } + at += padded_size; + break; + case SCTP_COOKIE_PRESERVE: + if (padded_size != sizeof(struct sctp_cookie_perserve_param)) { + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen); + goto invalid_size; + } + at += padded_size; + break; + case SCTP_HAS_NAT_SUPPORT: + *nat_friendly = 1; + /* fall through */ + case SCTP_PRSCTP_SUPPORTED: + if (padded_size != sizeof(struct sctp_paramhdr)) { + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen); + goto invalid_size; + } + at += padded_size; + break; + case SCTP_ECN_CAPABLE: + if (padded_size != sizeof(struct sctp_paramhdr)) { + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen); + goto invalid_size; + } + at += padded_size; + break; + case SCTP_ULP_ADAPTATION: + if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) { + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen); + goto invalid_size; + } + at += padded_size; + break; + case SCTP_SUCCESS_REPORT: + if (padded_size != sizeof(struct sctp_asconf_paramhdr)) { + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen); + goto invalid_size; + } + at += padded_size; + break; + case SCTP_HOSTNAME_ADDRESS: + { + /* We can NOT handle HOST NAME addresses!! */ + int l_len; + + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n"); + *abort_processing = 1; + if (op_err == NULL) { + /* Ok need to try to get a mbuf */ +#ifdef INET6 + l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); +#else + l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); +#endif + l_len += plen; + l_len += sizeof(struct sctp_paramhdr); + op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA); + if (op_err) { + SCTP_BUF_LEN(op_err) = 0; + /* + * pre-reserve space for ip and sctp + * header and chunk hdr + */ +#ifdef INET6 + SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); +#else + SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); +#endif + SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); + SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); + } + } + if (op_err) { + /* If we have space */ + struct sctp_paramhdr s; + + if (err_at % 4) { + uint32_t cpthis = 0; + + pad_needed = 4 - (err_at % 4); + m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); + err_at += pad_needed; + } + s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR); + s.param_length = htons(sizeof(s) + plen); + m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); + err_at += sizeof(s); + phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf),plen)); + if (phdr == NULL) { + sctp_m_freem(op_err); + /* + * we are out of memory but we still + * need to have a look at what to do + * (the system is in trouble + * though). + */ + return (NULL); + } + m_copyback(op_err, err_at, plen, (caddr_t)phdr); + } + return (op_err); + break; + } + default: + /* + * we do not recognize the parameter figure out what + * we do. + */ + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype); + if ((ptype & 0x4000) == 0x4000) { + /* Report bit is set?? */ + SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n"); + if (op_err == NULL) { + int l_len; + /* Ok need to try to get an mbuf */ +#ifdef INET6 + l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); +#else + l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); +#endif + l_len += plen; + l_len += sizeof(struct sctp_paramhdr); + op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA); + if (op_err) { + SCTP_BUF_LEN(op_err) = 0; +#ifdef INET6 + SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); +#else + SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); +#endif + SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); + SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); + } + } + if (op_err) { + /* If we have space */ + struct sctp_paramhdr s; + + if (err_at % 4) { + uint32_t cpthis = 0; + + pad_needed = 4 - (err_at % 4); + m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); + err_at += pad_needed; + } + s.param_type = htons(SCTP_UNRECOG_PARAM); + s.param_length = htons(sizeof(s) + plen); + m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); + err_at += sizeof(s); + if (plen > sizeof(tempbuf)) { + plen = sizeof(tempbuf); + } + phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf),plen)); + if (phdr == NULL) { + sctp_m_freem(op_err); + /* + * we are out of memory but + * we still need to have a + * look at what to do (the + * system is in trouble + * though). + */ + op_err = NULL; + goto more_processing; + } + m_copyback(op_err, err_at, plen, (caddr_t)phdr); + err_at += plen; + } + } + more_processing: + if ((ptype & 0x8000) == 0x0000) { + SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n"); + return (op_err); + } else { + /* skip this chunk and continue processing */ + SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n"); + at += SCTP_SIZE32(plen); + } + break; + + } + phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params)); + } + return (op_err); + invalid_size: + SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n"); + *abort_processing = 1; + if ((op_err == NULL) && phdr) { + int l_len; +#ifdef INET6 + l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); +#else + l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); +#endif + l_len += (2 * sizeof(struct sctp_paramhdr)); + op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA); + if (op_err) { + SCTP_BUF_LEN(op_err) = 0; +#ifdef INET6 + SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); +#else + SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); +#endif + SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); + SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); + } + } + if ((op_err) && phdr) { + struct sctp_paramhdr s; + + if (err_at % 4) { + uint32_t cpthis = 0; + + pad_needed = 4 - (err_at % 4); + m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); + err_at += pad_needed; + } + s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION); + s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr)); + m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); + err_at += sizeof(s); + /* Only copy back the p-hdr that caused the issue */ + m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr); + } + return (op_err); +} + +static int +sctp_are_there_new_addresses(struct sctp_association *asoc, + struct mbuf *in_initpkt, int offset, struct sockaddr *src) +{ + /* + * Given a INIT packet, look through the packet to verify that there + * are NO new addresses. As we go through the parameters add reports + * of any un-understood parameters that require an error. Also we + * must return (1) to drop the packet if we see a un-understood + * parameter that tells us to drop the chunk. + */ + struct sockaddr *sa_touse; + struct sockaddr *sa; + struct sctp_paramhdr *phdr, params; + uint16_t ptype, plen; + uint8_t fnd; + struct sctp_nets *net; +#ifdef INET + struct sockaddr_in sin4, *sa4; +#endif +#ifdef INET6 + struct sockaddr_in6 sin6, *sa6; +#endif + +#ifdef INET + memset(&sin4, 0, sizeof(sin4)); + sin4.sin_family = AF_INET; +#ifdef HAVE_SIN_LEN + sin4.sin_len = sizeof(sin4); +#endif +#endif +#ifdef INET6 + memset(&sin6, 0, sizeof(sin6)); + sin6.sin6_family = AF_INET6; +#ifdef HAVE_SIN6_LEN + sin6.sin6_len = sizeof(sin6); +#endif +#endif + /* First what about the src address of the pkt ? */ + fnd = 0; + TAILQ_FOREACH(net, &asoc->nets, sctp_next) { + sa = (struct sockaddr *)&net->ro._l_addr; + if (sa->sa_family == src->sa_family) { +#ifdef INET + if (sa->sa_family == AF_INET) { + struct sockaddr_in *src4; + + sa4 = (struct sockaddr_in *)sa; + src4 = (struct sockaddr_in *)src; + if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) { + fnd = 1; + break; + } + } +#endif +#ifdef INET6 + if (sa->sa_family == AF_INET6) { + struct sockaddr_in6 *src6; + + sa6 = (struct sockaddr_in6 *)sa; + src6 = (struct sockaddr_in6 *)src; + if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) { + fnd = 1; + break; + } + } +#endif + } + } + if (fnd == 0) { + /* New address added! no need to look futher. */ + return (1); + } + /* Ok so far lets munge through the rest of the packet */ + offset += sizeof(struct sctp_init_chunk); + phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params)); + while (phdr) { + sa_touse = NULL; + ptype = ntohs(phdr->param_type); + plen = ntohs(phdr->param_length); + switch (ptype) { +#ifdef INET + case SCTP_IPV4_ADDRESS: + { + struct sctp_ipv4addr_param *p4, p4_buf; + + phdr = sctp_get_next_param(in_initpkt, offset, + (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf)); + if (plen != sizeof(struct sctp_ipv4addr_param) || + phdr == NULL) { + return (1); + } + p4 = (struct sctp_ipv4addr_param *)phdr; + sin4.sin_addr.s_addr = p4->addr; + sa_touse = (struct sockaddr *)&sin4; + break; + } +#endif +#ifdef INET6 + case SCTP_IPV6_ADDRESS: + { + struct sctp_ipv6addr_param *p6, p6_buf; + + phdr = sctp_get_next_param(in_initpkt, offset, + (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf)); + if (plen != sizeof(struct sctp_ipv6addr_param) || + phdr == NULL) { + return (1); + } + p6 = (struct sctp_ipv6addr_param *)phdr; + memcpy((caddr_t)&sin6.sin6_addr, p6->addr, + sizeof(p6->addr)); + sa_touse = (struct sockaddr *)&sin6; + break; + } +#endif + default: + sa_touse = NULL; + break; + } + if (sa_touse) { + /* ok, sa_touse points to one to check */ + fnd = 0; + TAILQ_FOREACH(net, &asoc->nets, sctp_next) { + sa = (struct sockaddr *)&net->ro._l_addr; + if (sa->sa_family != sa_touse->sa_family) { + continue; + } +#ifdef INET + if (sa->sa_family == AF_INET) { + sa4 = (struct sockaddr_in *)sa; + if (sa4->sin_addr.s_addr == + sin4.sin_addr.s_addr) { + fnd = 1; + break; + } + } +#endif +#ifdef INET6 + if (sa->sa_family == AF_INET6) { + sa6 = (struct sockaddr_in6 *)sa; + if (SCTP6_ARE_ADDR_EQUAL( + sa6, &sin6)) { + fnd = 1; + break; + } + } +#endif + } + if (!fnd) { + /* New addr added! no need to look further */ + return (1); + } + } + offset += SCTP_SIZE32(plen); + phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params)); + } + return (0); +} + +/* + * Given a MBUF chain that was sent into us containing an INIT. Build a + * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done + * a pullup to include IPv6/4header, SCTP header and initial part of INIT + * message (i.e. the struct sctp_init_msg). + */ +void +sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb, + struct mbuf *init_pkt, int iphlen, int offset, + struct sockaddr *src, struct sockaddr *dst, + struct sctphdr *sh, struct sctp_init_chunk *init_chk, +#if defined(__FreeBSD__) + uint8_t mflowtype, uint32_t mflowid, +#endif + uint32_t vrf_id, uint16_t port, int hold_inp_lock) +{ + struct sctp_association *asoc; + struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err; + struct sctp_init_ack_chunk *initack; + struct sctp_adaptation_layer_indication *ali; + struct sctp_supported_chunk_types_param *pr_supported; + struct sctp_paramhdr *ph; + union sctp_sockstore *over_addr; + struct sctp_scoping scp; +#ifdef INET + struct sockaddr_in *dst4 = (struct sockaddr_in *)dst; + struct sockaddr_in *src4 = (struct sockaddr_in *)src; + struct sockaddr_in *sin; +#endif +#ifdef INET6 + struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst; + struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src; + struct sockaddr_in6 *sin6; +#endif +#if defined(__Userspace__) + struct sockaddr_conn *dstconn = (struct sockaddr_conn *)dst; + struct sockaddr_conn *srcconn = (struct sockaddr_conn *)src; + struct sockaddr_conn *sconn; +#endif + struct sockaddr *to; + struct sctp_state_cookie stc; + struct sctp_nets *net = NULL; + uint8_t *signature = NULL; + int cnt_inits_to = 0; + uint16_t his_limit, i_want; + int abort_flag; + int nat_friendly = 0; + struct socket *so; + uint16_t num_ext, chunk_len, padding_len, parameter_len; + + if (stcb) { + asoc = &stcb->asoc; + } else { + asoc = NULL; + } + if ((asoc != NULL) && + (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && + (sctp_are_there_new_addresses(asoc, init_pkt, offset, src))) { + /* new addresses, out of here in non-cookie-wait states */ + /* + * Send a ABORT, we don't add the new address error clause + * though we even set the T bit and copy in the 0 tag.. this + * looks no different than if no listener was present. + */ + op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), + "Address added"); + sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err, +#if defined(__FreeBSD__) + mflowtype, mflowid, +#endif + vrf_id, port); + return; + } + abort_flag = 0; + op_err = sctp_arethere_unrecognized_parameters(init_pkt, + (offset + sizeof(struct sctp_init_chunk)), + &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly); + if (abort_flag) { + do_a_abort: + if (op_err == NULL) { + char msg[SCTP_DIAG_INFO_LEN]; + + snprintf(msg, sizeof(msg), "%s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__); + op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), + msg); + } + sctp_send_abort(init_pkt, iphlen, src, dst, sh, + init_chk->init.initiate_tag, op_err, +#if defined(__FreeBSD__) + mflowtype, mflowid, +#endif + vrf_id, port); + return; + } + m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); + if (m == NULL) { + /* No memory, INIT timer will re-attempt. */ + if (op_err) + sctp_m_freem(op_err); + return; + } + chunk_len = (uint16_t)sizeof(struct sctp_init_ack_chunk); + padding_len = 0; + + /* + * We might not overwrite the identification[] completely and on + * some platforms time_entered will contain some padding. + * Therefore zero out the cookie to avoid putting + * uninitialized memory on the wire. + */ + memset(&stc, 0, sizeof(struct sctp_state_cookie)); + + /* the time I built cookie */ + (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered); + + /* populate any tie tags */ + if (asoc != NULL) { + /* unlock before tag selections */ + stc.tie_tag_my_vtag = asoc->my_vtag_nonce; + stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce; + stc.cookie_life = asoc->cookie_life; + net = asoc->primary_destination; + } else { + stc.tie_tag_my_vtag = 0; + stc.tie_tag_peer_vtag = 0; + /* life I will award this cookie */ + stc.cookie_life = inp->sctp_ep.def_cookie_life; + } + + /* copy in the ports for later check */ + stc.myport = sh->dest_port; + stc.peerport = sh->src_port; + + /* + * If we wanted to honor cookie life extentions, we would add to + * stc.cookie_life. For now we should NOT honor any extension + */ + stc.site_scope = stc.local_scope = stc.loopback_scope = 0; + if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { + stc.ipv6_addr_legal = 1; + if (SCTP_IPV6_V6ONLY(inp)) { + stc.ipv4_addr_legal = 0; + } else { + stc.ipv4_addr_legal = 1; + } +#if defined(__Userspace__) + stc.conn_addr_legal = 0; +#endif + } else { + stc.ipv6_addr_legal = 0; +#if defined(__Userspace__) + if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_CONN) { + stc.conn_addr_legal = 1; + stc.ipv4_addr_legal = 0; + } else { + stc.conn_addr_legal = 0; + stc.ipv4_addr_legal = 1; + } +#else + stc.ipv4_addr_legal = 1; +#endif + } +#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE + stc.ipv4_scope = 1; +#else + stc.ipv4_scope = 0; +#endif + if (net == NULL) { + to = src; + switch (dst->sa_family) { +#ifdef INET + case AF_INET: + { + /* lookup address */ + stc.address[0] = src4->sin_addr.s_addr; + stc.address[1] = 0; + stc.address[2] = 0; + stc.address[3] = 0; + stc.addr_type = SCTP_IPV4_ADDRESS; + /* local from address */ + stc.laddress[0] = dst4->sin_addr.s_addr; + stc.laddress[1] = 0; + stc.laddress[2] = 0; + stc.laddress[3] = 0; + stc.laddr_type = SCTP_IPV4_ADDRESS; + /* scope_id is only for v6 */ + stc.scope_id = 0; +#ifndef SCTP_DONT_DO_PRIVADDR_SCOPE + if (IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) { + stc.ipv4_scope = 1; + } +#else + stc.ipv4_scope = 1; +#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ + /* Must use the address in this case */ + if (sctp_is_address_on_local_host(src, vrf_id)) { + stc.loopback_scope = 1; + stc.ipv4_scope = 1; + stc.site_scope = 1; + stc.local_scope = 0; + } + break; + } +#endif +#ifdef INET6 + case AF_INET6: + { + stc.addr_type = SCTP_IPV6_ADDRESS; + memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr)); +#if defined(__FreeBSD__) && (((__FreeBSD_version < 900000) && (__FreeBSD_version >= 804000)) || (__FreeBSD_version > 900000)) + stc.scope_id = in6_getscope(&src6->sin6_addr); +#else + stc.scope_id = 0; +#endif + if (sctp_is_address_on_local_host(src, vrf_id)) { + stc.loopback_scope = 1; + stc.local_scope = 0; + stc.site_scope = 1; + stc.ipv4_scope = 1; + } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr)) { + /* + * If the new destination is a LINK_LOCAL we + * must have common both site and local + * scope. Don't set local scope though since + * we must depend on the source to be added + * implicitly. We cannot assure just because + * we share one link that all links are + * common. + */ +#if defined(__APPLE__) + /* Mac OS X currently doesn't have in6_getscope() */ + stc.scope_id = src6->sin6_addr.s6_addr16[1]; +#endif + stc.local_scope = 0; + stc.site_scope = 1; + stc.ipv4_scope = 1; + /* + * we start counting for the private address + * stuff at 1. since the link local we + * source from won't show up in our scoped + * count. + */ + cnt_inits_to = 1; + /* pull out the scope_id from incoming pkt */ + } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr)) { + /* + * If the new destination is SITE_LOCAL then + * we must have site scope in common. + */ + stc.site_scope = 1; + } + memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr)); + stc.laddr_type = SCTP_IPV6_ADDRESS; + break; + } +#endif +#if defined(__Userspace__) + case AF_CONN: + { + /* lookup address */ + stc.address[0] = 0; + stc.address[1] = 0; + stc.address[2] = 0; + stc.address[3] = 0; + memcpy(&stc.address, &srcconn->sconn_addr, sizeof(void *)); + stc.addr_type = SCTP_CONN_ADDRESS; + /* local from address */ + stc.laddress[0] = 0; + stc.laddress[1] = 0; + stc.laddress[2] = 0; + stc.laddress[3] = 0; + memcpy(&stc.laddress, &dstconn->sconn_addr, sizeof(void *)); + stc.laddr_type = SCTP_CONN_ADDRESS; + /* scope_id is only for v6 */ + stc.scope_id = 0; + break; + } +#endif + default: + /* TSNH */ + goto do_a_abort; + break; + } + } else { + /* set the scope per the existing tcb */ + +#ifdef INET6 + struct sctp_nets *lnet; +#endif + + stc.loopback_scope = asoc->scope.loopback_scope; + stc.ipv4_scope = asoc->scope.ipv4_local_scope; + stc.site_scope = asoc->scope.site_scope; + stc.local_scope = asoc->scope.local_scope; +#ifdef INET6 + /* Why do we not consider IPv4 LL addresses? */ + TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) { + if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) { + if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) { + /* + * if we have a LL address, start + * counting at 1. + */ + cnt_inits_to = 1; + } + } + } +#endif + /* use the net pointer */ + to = (struct sockaddr *)&net->ro._l_addr; + switch (to->sa_family) { +#ifdef INET + case AF_INET: + sin = (struct sockaddr_in *)to; + stc.address[0] = sin->sin_addr.s_addr; + stc.address[1] = 0; + stc.address[2] = 0; + stc.address[3] = 0; + stc.addr_type = SCTP_IPV4_ADDRESS; + if (net->src_addr_selected == 0) { + /* + * strange case here, the INIT should have + * did the selection. + */ + net->ro._s_addr = sctp_source_address_selection(inp, + stcb, (sctp_route_t *)&net->ro, + net, 0, vrf_id); + if (net->ro._s_addr == NULL) + return; + + net->src_addr_selected = 1; + + } + stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr; + stc.laddress[1] = 0; + stc.laddress[2] = 0; + stc.laddress[3] = 0; + stc.laddr_type = SCTP_IPV4_ADDRESS; + /* scope_id is only for v6 */ + stc.scope_id = 0; + break; +#endif +#ifdef INET6 + case AF_INET6: + sin6 = (struct sockaddr_in6 *)to; + memcpy(&stc.address, &sin6->sin6_addr, + sizeof(struct in6_addr)); + stc.addr_type = SCTP_IPV6_ADDRESS; + stc.scope_id = sin6->sin6_scope_id; + if (net->src_addr_selected == 0) { + /* + * strange case here, the INIT should have + * done the selection. + */ + net->ro._s_addr = sctp_source_address_selection(inp, + stcb, (sctp_route_t *)&net->ro, + net, 0, vrf_id); + if (net->ro._s_addr == NULL) + return; + + net->src_addr_selected = 1; + } + memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr, + sizeof(struct in6_addr)); + stc.laddr_type = SCTP_IPV6_ADDRESS; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + sconn = (struct sockaddr_conn *)to; + stc.address[0] = 0; + stc.address[1] = 0; + stc.address[2] = 0; + stc.address[3] = 0; + memcpy(&stc.address, &sconn->sconn_addr, sizeof(void *)); + stc.addr_type = SCTP_CONN_ADDRESS; + stc.laddress[0] = 0; + stc.laddress[1] = 0; + stc.laddress[2] = 0; + stc.laddress[3] = 0; + memcpy(&stc.laddress, &sconn->sconn_addr, sizeof(void *)); + stc.laddr_type = SCTP_CONN_ADDRESS; + stc.scope_id = 0; + break; +#endif + } + } + /* Now lets put the SCTP header in place */ + initack = mtod(m, struct sctp_init_ack_chunk *); + /* Save it off for quick ref */ + stc.peers_vtag = init_chk->init.initiate_tag; + /* who are we */ + memcpy(stc.identification, SCTP_VERSION_STRING, + min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification))); + memset(stc.reserved, 0, SCTP_RESERVE_SPACE); + /* now the chunk header */ + initack->ch.chunk_type = SCTP_INITIATION_ACK; + initack->ch.chunk_flags = 0; + /* fill in later from mbuf we build */ + initack->ch.chunk_length = 0; + /* place in my tag */ + if ((asoc != NULL) && + ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || + (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) || + (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) { + /* re-use the v-tags and init-seq here */ + initack->init.initiate_tag = htonl(asoc->my_vtag); + initack->init.initial_tsn = htonl(asoc->init_seq_number); + } else { + uint32_t vtag, itsn; + if (hold_inp_lock) { + SCTP_INP_INCR_REF(inp); + SCTP_INP_RUNLOCK(inp); + } + if (asoc) { + atomic_add_int(&asoc->refcnt, 1); + SCTP_TCB_UNLOCK(stcb); + new_tag: + vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1); + if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) { + /* Got a duplicate vtag on some guy behind a nat + * make sure we don't use it. + */ + goto new_tag; + } + initack->init.initiate_tag = htonl(vtag); + /* get a TSN to use too */ + itsn = sctp_select_initial_TSN(&inp->sctp_ep); + initack->init.initial_tsn = htonl(itsn); + SCTP_TCB_LOCK(stcb); + atomic_add_int(&asoc->refcnt, -1); + } else { + vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1); + initack->init.initiate_tag = htonl(vtag); + /* get a TSN to use too */ + initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep)); + } + if (hold_inp_lock) { + SCTP_INP_RLOCK(inp); + SCTP_INP_DECR_REF(inp); + } + } + /* save away my tag to */ + stc.my_vtag = initack->init.initiate_tag; + + /* set up some of the credits. */ + so = inp->sctp_socket; + if (so == NULL) { + /* memory problem */ + sctp_m_freem(m); + return; + } else { + initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND)); + } + /* set what I want */ + his_limit = ntohs(init_chk->init.num_inbound_streams); + /* choose what I want */ + if (asoc != NULL) { + if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) { + i_want = asoc->streamoutcnt; + } else { + i_want = inp->sctp_ep.pre_open_stream_count; + } + } else { + i_want = inp->sctp_ep.pre_open_stream_count; + } + if (his_limit < i_want) { + /* I Want more :< */ + initack->init.num_outbound_streams = init_chk->init.num_inbound_streams; + } else { + /* I can have what I want :> */ + initack->init.num_outbound_streams = htons(i_want); + } + /* tell him his limit. */ + initack->init.num_inbound_streams = + htons(inp->sctp_ep.max_open_streams_intome); + + /* adaptation layer indication parameter */ + if (inp->sctp_ep.adaptation_layer_indicator_provided) { + parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication); + ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t) + chunk_len); + ali->ph.param_type = htons(SCTP_ULP_ADAPTATION); + ali->ph.param_length = htons(parameter_len); + ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator); + chunk_len += parameter_len; + } + + /* ECN parameter */ + if (((asoc != NULL) && (asoc->ecn_supported == 1)) || + ((asoc == NULL) && (inp->ecn_supported == 1))) { + parameter_len = (uint16_t)sizeof(struct sctp_paramhdr); + ph = (struct sctp_paramhdr *)(mtod(m, caddr_t) + chunk_len); + ph->param_type = htons(SCTP_ECN_CAPABLE); + ph->param_length = htons(parameter_len); + chunk_len += parameter_len; + } + + /* PR-SCTP supported parameter */ + if (((asoc != NULL) && (asoc->prsctp_supported == 1)) || + ((asoc == NULL) && (inp->prsctp_supported == 1))) { + parameter_len = (uint16_t)sizeof(struct sctp_paramhdr); + ph = (struct sctp_paramhdr *)(mtod(m, caddr_t) + chunk_len); + ph->param_type = htons(SCTP_PRSCTP_SUPPORTED); + ph->param_length = htons(parameter_len); + chunk_len += parameter_len; + } + + /* Add NAT friendly parameter */ + if (nat_friendly) { + parameter_len = (uint16_t)sizeof(struct sctp_paramhdr); + ph = (struct sctp_paramhdr *)(mtod(m, caddr_t) + chunk_len); + ph->param_type = htons(SCTP_HAS_NAT_SUPPORT); + ph->param_length = htons(parameter_len); + chunk_len += parameter_len; + } + + /* And now tell the peer which extensions we support */ + num_ext = 0; + pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t) + chunk_len); + if (((asoc != NULL) && (asoc->prsctp_supported == 1)) || + ((asoc == NULL) && (inp->prsctp_supported == 1))) { + pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN; + } + if (((asoc != NULL) && (asoc->auth_supported == 1)) || + ((asoc == NULL) && (inp->auth_supported == 1))) { + pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION; + } + if (((asoc != NULL) && (asoc->asconf_supported == 1)) || + ((asoc == NULL) && (inp->asconf_supported == 1))) { + pr_supported->chunk_types[num_ext++] = SCTP_ASCONF; + pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK; + } + if (((asoc != NULL) && (asoc->reconfig_supported == 1)) || + ((asoc == NULL) && (inp->reconfig_supported == 1))) { + pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET; + } + if (((asoc != NULL) && (asoc->nrsack_supported == 1)) || + ((asoc == NULL) && (inp->nrsack_supported == 1))) { + pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK; + } + if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) || + ((asoc == NULL) && (inp->pktdrop_supported == 1))) { + pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED; + } + if (num_ext > 0) { + parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext; + pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT); + pr_supported->ph.param_length = htons(parameter_len); + padding_len = SCTP_SIZE32(parameter_len) - parameter_len; + chunk_len += parameter_len; + } + + /* add authentication parameters */ + if (((asoc != NULL) && (asoc->auth_supported == 1)) || + ((asoc == NULL) && (inp->auth_supported == 1))) { + struct sctp_auth_random *randp; + struct sctp_auth_hmac_algo *hmacs; + struct sctp_auth_chunk_list *chunks; + + if (padding_len > 0) { + memset(mtod(m, caddr_t) + chunk_len, 0, padding_len); + chunk_len += padding_len; + padding_len = 0; + } + /* generate and add RANDOM parameter */ + randp = (struct sctp_auth_random *)(mtod(m, caddr_t) + chunk_len); + parameter_len = (uint16_t)sizeof(struct sctp_auth_random) + + SCTP_AUTH_RANDOM_SIZE_DEFAULT; + randp->ph.param_type = htons(SCTP_RANDOM); + randp->ph.param_length = htons(parameter_len); + SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT); + padding_len = SCTP_SIZE32(parameter_len) - parameter_len; + chunk_len += parameter_len; + + if (padding_len > 0) { + memset(mtod(m, caddr_t) + chunk_len, 0, padding_len); + chunk_len += padding_len; + padding_len = 0; + } + /* add HMAC_ALGO parameter */ + hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t) + chunk_len); + parameter_len = (uint16_t)sizeof(struct sctp_auth_hmac_algo) + + sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs, + (uint8_t *)hmacs->hmac_ids); + hmacs->ph.param_type = htons(SCTP_HMAC_LIST); + hmacs->ph.param_length = htons(parameter_len); + padding_len = SCTP_SIZE32(parameter_len) - parameter_len; + chunk_len += parameter_len; + + if (padding_len > 0) { + memset(mtod(m, caddr_t) + chunk_len, 0, padding_len); + chunk_len += padding_len; + padding_len = 0; + } + /* add CHUNKS parameter */ + chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t) + chunk_len); + parameter_len = (uint16_t)sizeof(struct sctp_auth_chunk_list) + + sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks, + chunks->chunk_types); + chunks->ph.param_type = htons(SCTP_CHUNK_LIST); + chunks->ph.param_length = htons(parameter_len); + padding_len = SCTP_SIZE32(parameter_len) - parameter_len; + chunk_len += parameter_len; + } + SCTP_BUF_LEN(m) = chunk_len; + m_last = m; + /* now the addresses */ + /* To optimize this we could put the scoping stuff + * into a structure and remove the individual uint8's from + * the stc structure. Then we could just sifa in the + * address within the stc.. but for now this is a quick + * hack to get the address stuff teased apart. + */ + scp.ipv4_addr_legal = stc.ipv4_addr_legal; + scp.ipv6_addr_legal = stc.ipv6_addr_legal; +#if defined(__Userspace__) + scp.conn_addr_legal = stc.conn_addr_legal; +#endif + scp.loopback_scope = stc.loopback_scope; + scp.ipv4_local_scope = stc.ipv4_scope; + scp.local_scope = stc.local_scope; + scp.site_scope = stc.site_scope; + m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last, + cnt_inits_to, + &padding_len, &chunk_len); + /* padding_len can only be positive, if no addresses have been added */ + if (padding_len > 0) { + memset(mtod(m, caddr_t) + chunk_len, 0, padding_len); + chunk_len += padding_len; + SCTP_BUF_LEN(m) += padding_len; + padding_len = 0; + } + + /* tack on the operational error if present */ + if (op_err) { + parameter_len = 0; + for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) { + parameter_len += SCTP_BUF_LEN(m_tmp); + } + padding_len = SCTP_SIZE32(parameter_len) - parameter_len; + SCTP_BUF_NEXT(m_last) = op_err; + while (SCTP_BUF_NEXT(m_last) != NULL) { + m_last = SCTP_BUF_NEXT(m_last); + } + chunk_len += parameter_len; + } + if (padding_len > 0) { + m_last = sctp_add_pad_tombuf(m_last, padding_len); + if (m_last == NULL) { + /* Houston we have a problem, no space */ + sctp_m_freem(m); + return; + } + chunk_len += padding_len; + padding_len = 0; + } + /* Now we must build a cookie */ + m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature); + if (m_cookie == NULL) { + /* memory problem */ + sctp_m_freem(m); + return; + } + /* Now append the cookie to the end and update the space/size */ + SCTP_BUF_NEXT(m_last) = m_cookie; + parameter_len = 0; + for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) { + parameter_len += SCTP_BUF_LEN(m_tmp); + if (SCTP_BUF_NEXT(m_tmp) == NULL) { + m_last = m_tmp; + } + } + padding_len = SCTP_SIZE32(parameter_len) - parameter_len; + chunk_len += parameter_len; + + /* Place in the size, but we don't include + * the last pad (if any) in the INIT-ACK. + */ + initack->ch.chunk_length = htons(chunk_len); + + /* Time to sign the cookie, we don't sign over the cookie + * signature though thus we set trailer. + */ + (void)sctp_hmac_m(SCTP_HMAC, + (uint8_t *)inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)], + SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr), + (uint8_t *)signature, SCTP_SIGNATURE_SIZE); + /* + * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return + * here since the timer will drive a retranmission. + */ + if (padding_len > 0) { + if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) { + sctp_m_freem(m); + return; + } + } + if (stc.loopback_scope) { + over_addr = (union sctp_sockstore *)dst; + } else { + over_addr = NULL; + } + + (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0, + 0, 0, + inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag, + port, over_addr, +#if defined(__FreeBSD__) + mflowtype, mflowid, +#endif + SCTP_SO_NOT_LOCKED); + SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); +} + + +static void +sctp_prune_prsctp(struct sctp_tcb *stcb, + struct sctp_association *asoc, + struct sctp_sndrcvinfo *srcv, + int dataout) +{ + int freed_spc = 0; + struct sctp_tmit_chunk *chk, *nchk; + + SCTP_TCB_LOCK_ASSERT(stcb); + if ((asoc->prsctp_supported) && + (asoc->sent_queue_cnt_removeable > 0)) { + TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { + /* + * Look for chunks marked with the PR_SCTP flag AND + * the buffer space flag. If the one being sent is + * equal or greater priority then purge the old one + * and free some space. + */ + if (PR_SCTP_BUF_ENABLED(chk->flags)) { + /* + * This one is PR-SCTP AND buffer space + * limited type + */ + if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) { + /* + * Lower numbers equates to higher + * priority so if the one we are + * looking at has a larger or equal + * priority we want to drop the data + * and NOT retransmit it. + */ + if (chk->data) { + /* + * We release the book_size + * if the mbuf is here + */ + int ret_spc; + uint8_t sent; + + if (chk->sent > SCTP_DATAGRAM_UNSENT) + sent = 1; + else + sent = 0; + ret_spc = sctp_release_pr_sctp_chunk(stcb, chk, + sent, + SCTP_SO_LOCKED); + freed_spc += ret_spc; + if (freed_spc >= dataout) { + return; + } + } /* if chunk was present */ + } /* if of sufficent priority */ + } /* if chunk has enabled */ + } /* tailqforeach */ + + TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { + /* Here we must move to the sent queue and mark */ + if (PR_SCTP_BUF_ENABLED(chk->flags)) { + if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) { + if (chk->data) { + /* + * We release the book_size + * if the mbuf is here + */ + int ret_spc; + + ret_spc = sctp_release_pr_sctp_chunk(stcb, chk, + 0, SCTP_SO_LOCKED); + + freed_spc += ret_spc; + if (freed_spc >= dataout) { + return; + } + } /* end if chk->data */ + } /* end if right class */ + } /* end if chk pr-sctp */ + } /* tailqforeachsafe (chk) */ + } /* if enabled in asoc */ +} + +int +sctp_get_frag_point(struct sctp_tcb *stcb, + struct sctp_association *asoc) +{ + int siz, ovh; + + /* + * For endpoints that have both v6 and v4 addresses we must reserve + * room for the ipv6 header, for those that are only dealing with V4 + * we use a larger frag point. + */ + if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { + ovh = SCTP_MED_OVERHEAD; + } else { + ovh = SCTP_MED_V4_OVERHEAD; + } + + if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu) + siz = asoc->smallest_mtu - ovh; + else + siz = (stcb->asoc.sctp_frag_point - ovh); + /* + * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) { + */ + /* A data chunk MUST fit in a cluster */ + /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */ + /* } */ + + /* adjust for an AUTH chunk if DATA requires auth */ + if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) + siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); + + if (siz % 4) { + /* make it an even word boundary please */ + siz -= (siz % 4); + } + return (siz); +} + +static void +sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp) +{ + /* + * We assume that the user wants PR_SCTP_TTL if the user + * provides a positive lifetime but does not specify any + * PR_SCTP policy. + */ + if (PR_SCTP_ENABLED(sp->sinfo_flags)) { + sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags); + } else if (sp->timetolive > 0) { + sp->sinfo_flags |= SCTP_PR_SCTP_TTL; + sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags); + } else { + return; + } + switch (PR_SCTP_POLICY(sp->sinfo_flags)) { + case CHUNK_FLAGS_PR_SCTP_BUF: + /* + * Time to live is a priority stored in tv_sec when + * doing the buffer drop thing. + */ + sp->ts.tv_sec = sp->timetolive; + sp->ts.tv_usec = 0; + break; + case CHUNK_FLAGS_PR_SCTP_TTL: + { + struct timeval tv; + (void)SCTP_GETTIME_TIMEVAL(&sp->ts); + tv.tv_sec = sp->timetolive / 1000; + tv.tv_usec = (sp->timetolive * 1000) % 1000000; + /* TODO sctp_constants.h needs alternative time macros when + * _KERNEL is undefined. + */ +#ifndef __FreeBSD__ + timeradd(&sp->ts, &tv, &sp->ts); +#else + timevaladd(&sp->ts, &tv); +#endif + } + break; + case CHUNK_FLAGS_PR_SCTP_RTX: + /* + * Time to live is a the number or retransmissions + * stored in tv_sec. + */ + sp->ts.tv_sec = sp->timetolive; + sp->ts.tv_usec = 0; + break; + default: + SCTPDBG(SCTP_DEBUG_USRREQ1, + "Unknown PR_SCTP policy %u.\n", + PR_SCTP_POLICY(sp->sinfo_flags)); + break; + } +} + +static int +sctp_msg_append(struct sctp_tcb *stcb, + struct sctp_nets *net, + struct mbuf *m, + struct sctp_sndrcvinfo *srcv, int hold_stcb_lock) +{ + int error = 0; + struct mbuf *at; + struct sctp_stream_queue_pending *sp = NULL; + struct sctp_stream_out *strm; + + /* Given an mbuf chain, put it + * into the association send queue and + * place it on the wheel + */ + if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) { + /* Invalid stream number */ + SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + error = EINVAL; + goto out_now; + } + if ((stcb->asoc.stream_locked) && + (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) { + SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + error = EINVAL; + goto out_now; + } + strm = &stcb->asoc.strmout[srcv->sinfo_stream]; + /* Now can we send this? */ + if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) || + (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || + (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || + (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) { + /* got data while shutting down */ + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); + error = ECONNRESET; + goto out_now; + } + sctp_alloc_a_strmoq(stcb, sp); + if (sp == NULL) { + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + error = ENOMEM; + goto out_now; + } + sp->sinfo_flags = srcv->sinfo_flags; + sp->timetolive = srcv->sinfo_timetolive; + sp->ppid = srcv->sinfo_ppid; + sp->context = srcv->sinfo_context; + if (sp->sinfo_flags & SCTP_ADDR_OVER) { + sp->net = net; + atomic_add_int(&sp->net->ref_count, 1); + } else { + sp->net = NULL; + } + (void)SCTP_GETTIME_TIMEVAL(&sp->ts); + sp->stream = srcv->sinfo_stream; + sp->msg_is_complete = 1; + sp->sender_all_done = 1; + sp->some_taken = 0; + sp->data = m; + sp->tail_mbuf = NULL; + sctp_set_prsctp_policy(sp); + /* We could in theory (for sendall) sifa the length + * in, but we would still have to hunt through the + * chain since we need to setup the tail_mbuf + */ + sp->length = 0; + for (at = m; at; at = SCTP_BUF_NEXT(at)) { + if (SCTP_BUF_NEXT(at) == NULL) + sp->tail_mbuf = at; + sp->length += SCTP_BUF_LEN(at); + } + if (srcv->sinfo_keynumber_valid) { + sp->auth_keyid = srcv->sinfo_keynumber; + } else { + sp->auth_keyid = stcb->asoc.authinfo.active_keyid; + } + if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) { + sctp_auth_key_acquire(stcb, sp->auth_keyid); + sp->holds_key_ref = 1; + } + if (hold_stcb_lock == 0) { + SCTP_TCB_SEND_LOCK(stcb); + } + sctp_snd_sb_alloc(stcb, sp->length); + atomic_add_int(&stcb->asoc.stream_queue_cnt, 1); + TAILQ_INSERT_TAIL(&strm->outqueue, sp, next); + stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1); + m = NULL; + if (hold_stcb_lock == 0) { + SCTP_TCB_SEND_UNLOCK(stcb); + } +out_now: + if (m) { + sctp_m_freem(m); + } + return (error); +} + + +static struct mbuf * +sctp_copy_mbufchain(struct mbuf *clonechain, + struct mbuf *outchain, + struct mbuf **endofchain, + int can_take_mbuf, + int sizeofcpy, + uint8_t copy_by_ref) +{ + struct mbuf *m; + struct mbuf *appendchain; + caddr_t cp; + int len; + + if (endofchain == NULL) { + /* error */ + error_out: + if (outchain) + sctp_m_freem(outchain); + return (NULL); + } + if (can_take_mbuf) { + appendchain = clonechain; + } else { + if (!copy_by_ref && +#if defined(__Panda__) + 0 +#else + (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN))) +#endif + ) { + /* Its not in a cluster */ + if (*endofchain == NULL) { + /* lets get a mbuf cluster */ + if (outchain == NULL) { + /* This is the general case */ + new_mbuf: + outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER); + if (outchain == NULL) { + goto error_out; + } + SCTP_BUF_LEN(outchain) = 0; + *endofchain = outchain; + /* get the prepend space */ + SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV+4)); + } else { + /* We really should not get a NULL in endofchain */ + /* find end */ + m = outchain; + while (m) { + if (SCTP_BUF_NEXT(m) == NULL) { + *endofchain = m; + break; + } + m = SCTP_BUF_NEXT(m); + } + /* sanity */ + if (*endofchain == NULL) { + /* huh, TSNH XXX maybe we should panic */ + sctp_m_freem(outchain); + goto new_mbuf; + } + } + /* get the new end of length */ + len = M_TRAILINGSPACE(*endofchain); + } else { + /* how much is left at the end? */ + len = M_TRAILINGSPACE(*endofchain); + } + /* Find the end of the data, for appending */ + cp = (mtod((*endofchain), caddr_t) + SCTP_BUF_LEN((*endofchain))); + + /* Now lets copy it out */ + if (len >= sizeofcpy) { + /* It all fits, copy it in */ + m_copydata(clonechain, 0, sizeofcpy, cp); + SCTP_BUF_LEN((*endofchain)) += sizeofcpy; + } else { + /* fill up the end of the chain */ + if (len > 0) { + m_copydata(clonechain, 0, len, cp); + SCTP_BUF_LEN((*endofchain)) += len; + /* now we need another one */ + sizeofcpy -= len; + } + m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER); + if (m == NULL) { + /* We failed */ + goto error_out; + } + SCTP_BUF_NEXT((*endofchain)) = m; + *endofchain = m; + cp = mtod((*endofchain), caddr_t); + m_copydata(clonechain, len, sizeofcpy, cp); + SCTP_BUF_LEN((*endofchain)) += sizeofcpy; + } + return (outchain); + } else { + /* copy the old fashion way */ + appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT); +#ifdef SCTP_MBUF_LOGGING + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { + sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY); + } +#endif + } + } + if (appendchain == NULL) { + /* error */ + if (outchain) + sctp_m_freem(outchain); + return (NULL); + } + if (outchain) { + /* tack on to the end */ + if (*endofchain != NULL) { + SCTP_BUF_NEXT(((*endofchain))) = appendchain; + } else { + m = outchain; + while (m) { + if (SCTP_BUF_NEXT(m) == NULL) { + SCTP_BUF_NEXT(m) = appendchain; + break; + } + m = SCTP_BUF_NEXT(m); + } + } + /* + * save off the end and update the end-chain + * postion + */ + m = appendchain; + while (m) { + if (SCTP_BUF_NEXT(m) == NULL) { + *endofchain = m; + break; + } + m = SCTP_BUF_NEXT(m); + } + return (outchain); + } else { + /* save off the end and update the end-chain postion */ + m = appendchain; + while (m) { + if (SCTP_BUF_NEXT(m) == NULL) { + *endofchain = m; + break; + } + m = SCTP_BUF_NEXT(m); + } + return (appendchain); + } +} + +static int +sctp_med_chunk_output(struct sctp_inpcb *inp, + struct sctp_tcb *stcb, + struct sctp_association *asoc, + int *num_out, + int *reason_code, + int control_only, int from_where, + struct timeval *now, int *now_filled, int frag_point, int so_locked +#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) + SCTP_UNUSED +#endif + ); + +static void +sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr, + uint32_t val SCTP_UNUSED) +{ + struct sctp_copy_all *ca; + struct mbuf *m; + int ret = 0; + int added_control = 0; + int un_sent, do_chunk_output = 1; + struct sctp_association *asoc; + struct sctp_nets *net; + + ca = (struct sctp_copy_all *)ptr; + if (ca->m == NULL) { + return; + } + if (ca->inp != inp) { + /* TSNH */ + return; + } + if (ca->sndlen > 0) { + m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT); + if (m == NULL) { + /* can't copy so we are done */ + ca->cnt_failed++; + return; + } +#ifdef SCTP_MBUF_LOGGING + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { + sctp_log_mbc(m, SCTP_MBUF_ICOPY); + } +#endif + } else { + m = NULL; + } + SCTP_TCB_LOCK_ASSERT(stcb); + if (stcb->asoc.alternate) { + net = stcb->asoc.alternate; + } else { + net = stcb->asoc.primary_destination; + } + if (ca->sndrcv.sinfo_flags & SCTP_ABORT) { + /* Abort this assoc with m as the user defined reason */ + if (m != NULL) { + SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT); + } else { + m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), + 0, M_NOWAIT, 1, MT_DATA); + SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr); + } + if (m != NULL) { + struct sctp_paramhdr *ph; + + ph = mtod(m, struct sctp_paramhdr *); + ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); + ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen); + } + /* We add one here to keep the assoc from + * dis-appearing on us. + */ + atomic_add_int(&stcb->asoc.refcnt, 1); + sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED); + /* sctp_abort_an_association calls sctp_free_asoc() + * free association will NOT free it since we + * incremented the refcnt .. we do this to prevent + * it being freed and things getting tricky since + * we could end up (from free_asoc) calling inpcb_free + * which would get a recursive lock call to the + * iterator lock.. But as a consequence of that the + * stcb will return to us un-locked.. since free_asoc + * returns with either no TCB or the TCB unlocked, we + * must relock.. to unlock in the iterator timer :-0 + */ + SCTP_TCB_LOCK(stcb); + atomic_add_int(&stcb->asoc.refcnt, -1); + goto no_chunk_output; + } else { + if (m) { + ret = sctp_msg_append(stcb, net, m, + &ca->sndrcv, 1); + } + asoc = &stcb->asoc; + if (ca->sndrcv.sinfo_flags & SCTP_EOF) { + /* shutdown this assoc */ + int cnt; + cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED); + + if (TAILQ_EMPTY(&asoc->send_queue) && + TAILQ_EMPTY(&asoc->sent_queue) && + (cnt == 0)) { + if (asoc->locked_on_sending) { + goto abort_anyway; + } + /* there is nothing queued to send, so I'm done... */ + if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && + (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && + (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { + /* only send SHUTDOWN the first time through */ + if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { + SCTP_STAT_DECR_GAUGE32(sctps_currestab); + } + SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); + SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); + sctp_stop_timers_for_shutdown(stcb); + sctp_send_shutdown(stcb, net); + sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, + net); + sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, + asoc->primary_destination); + added_control = 1; + do_chunk_output = 0; + } + } else { + /* + * we still got (or just got) data to send, so set + * SHUTDOWN_PENDING + */ + /* + * XXX sockets draft says that SCTP_EOF should be + * sent with no data. currently, we will allow user + * data to be sent first and move to + * SHUTDOWN-PENDING + */ + if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && + (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && + (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { + if (asoc->locked_on_sending) { + /* Locked to send out the data */ + struct sctp_stream_queue_pending *sp; + sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead); + if (sp) { + if ((sp->length == 0) && (sp->msg_is_complete == 0)) + asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT; + } + } + asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; + if (TAILQ_EMPTY(&asoc->send_queue) && + TAILQ_EMPTY(&asoc->sent_queue) && + (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) { + abort_anyway: + atomic_add_int(&stcb->asoc.refcnt, 1); + sctp_abort_an_association(stcb->sctp_ep, stcb, + NULL, SCTP_SO_NOT_LOCKED); + atomic_add_int(&stcb->asoc.refcnt, -1); + goto no_chunk_output; + } + sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, + asoc->primary_destination); + } + } + + } + } + un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + + (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); + + if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && + (stcb->asoc.total_flight > 0) && + (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) { + do_chunk_output = 0; + } + if (do_chunk_output) + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED); + else if (added_control) { + int num_out, reason, now_filled = 0; + struct timeval now; + int frag_point; + + frag_point = sctp_get_frag_point(stcb, &stcb->asoc); + (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out, + &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED); + } + no_chunk_output: + if (ret) { + ca->cnt_failed++; + } else { + ca->cnt_sent++; + } +} + +static void +sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED) +{ + struct sctp_copy_all *ca; + + ca = (struct sctp_copy_all *)ptr; + /* + * Do a notify here? Kacheong suggests that the notify be done at + * the send time.. so you would push up a notification if any send + * failed. Don't know if this is feasable since the only failures we + * have is "memory" related and if you cannot get an mbuf to send + * the data you surely can't get an mbuf to send up to notify the + * user you can't send the data :-> + */ + + /* now free everything */ + sctp_m_freem(ca->m); + SCTP_FREE(ca, SCTP_M_COPYAL); +} + +static struct mbuf * +sctp_copy_out_all(struct uio *uio, int len) +{ + struct mbuf *ret, *at; + int left, willcpy, cancpy, error; + + ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA); + if (ret == NULL) { + /* TSNH */ + return (NULL); + } + left = len; + SCTP_BUF_LEN(ret) = 0; + /* save space for the data chunk header */ + cancpy = M_TRAILINGSPACE(ret); + willcpy = min(cancpy, left); + at = ret; + while (left > 0) { + /* Align data to the end */ + error = uiomove(mtod(at, caddr_t), willcpy, uio); + if (error) { + err_out_now: + sctp_m_freem(at); + return (NULL); + } + SCTP_BUF_LEN(at) = willcpy; + SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0; + left -= willcpy; + if (left > 0) { + SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA); + if (SCTP_BUF_NEXT(at) == NULL) { + goto err_out_now; + } + at = SCTP_BUF_NEXT(at); + SCTP_BUF_LEN(at) = 0; + cancpy = M_TRAILINGSPACE(at); + willcpy = min(cancpy, left); + } + } + return (ret); +} + +static int +sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m, + struct sctp_sndrcvinfo *srcv) +{ + int ret; + struct sctp_copy_all *ca; + + SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all), + SCTP_M_COPYAL); + if (ca == NULL) { + sctp_m_freem(m); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + return (ENOMEM); + } + memset(ca, 0, sizeof(struct sctp_copy_all)); + + ca->inp = inp; + if (srcv) { + memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo)); + } + /* + * take off the sendall flag, it would be bad if we failed to do + * this :-0 + */ + ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL; + /* get length and mbuf chain */ + if (uio) { +#if defined(__APPLE__) +#if defined(APPLE_LEOPARD) + ca->sndlen = uio->uio_resid; +#else + ca->sndlen = uio_resid(uio); +#endif +#else + ca->sndlen = uio->uio_resid; +#endif +#if defined(__APPLE__) + SCTP_SOCKET_UNLOCK(SCTP_INP_SO(inp), 0); +#endif + ca->m = sctp_copy_out_all(uio, ca->sndlen); +#if defined(__APPLE__) + SCTP_SOCKET_LOCK(SCTP_INP_SO(inp), 0); +#endif + if (ca->m == NULL) { + SCTP_FREE(ca, SCTP_M_COPYAL); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + return (ENOMEM); + } + } else { + /* Gather the length of the send */ + struct mbuf *mat; + + ca->sndlen = 0; + for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) { + ca->sndlen += SCTP_BUF_LEN(mat); + } + } + ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL, + SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES, + SCTP_ASOC_ANY_STATE, + (void *)ca, 0, + sctp_sendall_completes, inp, 1); + if (ret) { + SCTP_PRINTF("Failed to initiate iterator for sendall\n"); + SCTP_FREE(ca, SCTP_M_COPYAL); + SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT); + return (EFAULT); + } + return (0); +} + + +void +sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc) +{ + struct sctp_tmit_chunk *chk, *nchk; + + TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { + if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { + TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); + if (chk->data) { + sctp_m_freem(chk->data); + chk->data = NULL; + } + asoc->ctrl_queue_cnt--; + sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); + } + } +} + +void +sctp_toss_old_asconf(struct sctp_tcb *stcb) +{ + struct sctp_association *asoc; + struct sctp_tmit_chunk *chk, *nchk; + struct sctp_asconf_chunk *acp; + + asoc = &stcb->asoc; + TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { + /* find SCTP_ASCONF chunk in queue */ + if (chk->rec.chunk_id.id == SCTP_ASCONF) { + if (chk->data) { + acp = mtod(chk->data, struct sctp_asconf_chunk *); + if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) { + /* Not Acked yet */ + break; + } + } + TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); + if (chk->data) { + sctp_m_freem(chk->data); + chk->data = NULL; + } + asoc->ctrl_queue_cnt--; + sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); + } + } +} + + +static void +sctp_clean_up_datalist(struct sctp_tcb *stcb, + struct sctp_association *asoc, + struct sctp_tmit_chunk **data_list, + int bundle_at, + struct sctp_nets *net) +{ + int i; + struct sctp_tmit_chunk *tp1; + + for (i = 0; i < bundle_at; i++) { + /* off of the send queue */ + TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next); + asoc->send_queue_cnt--; + if (i > 0) { + /* + * Any chunk NOT 0 you zap the time chunk 0 gets + * zapped or set based on if a RTO measurment is + * needed. + */ + data_list[i]->do_rtt = 0; + } + /* record time */ + data_list[i]->sent_rcv_time = net->last_sent_time; + data_list[i]->rec.data.cwnd_at_send = net->cwnd; + data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq; + if (data_list[i]->whoTo == NULL) { + data_list[i]->whoTo = net; + atomic_add_int(&net->ref_count, 1); + } + /* on to the sent queue */ + tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead); + if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) { + struct sctp_tmit_chunk *tpp; + + /* need to move back */ + back_up_more: + tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next); + if (tpp == NULL) { + TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next); + goto all_done; + } + tp1 = tpp; + if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) { + goto back_up_more; + } + TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next); + } else { + TAILQ_INSERT_TAIL(&asoc->sent_queue, + data_list[i], + sctp_next); + } + all_done: + /* This does not lower until the cum-ack passes it */ + asoc->sent_queue_cnt++; + if ((asoc->peers_rwnd <= 0) && + (asoc->total_flight == 0) && + (bundle_at == 1)) { + /* Mark the chunk as being a window probe */ + SCTP_STAT_INCR(sctps_windowprobed); + } +#ifdef SCTP_AUDITING_ENABLED + sctp_audit_log(0xC2, 3); +#endif + data_list[i]->sent = SCTP_DATAGRAM_SENT; + data_list[i]->snd_count = 1; + data_list[i]->rec.data.chunk_was_revoked = 0; + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { + sctp_misc_ints(SCTP_FLIGHT_LOG_UP, + data_list[i]->whoTo->flight_size, + data_list[i]->book_size, + (uintptr_t)data_list[i]->whoTo, + data_list[i]->rec.data.TSN_seq); + } + sctp_flight_size_increase(data_list[i]); + sctp_total_flight_increase(stcb, data_list[i]); + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) { + sctp_log_rwnd(SCTP_DECREASE_PEER_RWND, + asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)); + } + asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd, + (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh))); + if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) { + /* SWS sender side engages */ + asoc->peers_rwnd = 0; + } + } + if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) { + (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted)(stcb, net); + } +} + +static void +sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked +#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) + SCTP_UNUSED +#endif +) +{ + struct sctp_tmit_chunk *chk, *nchk; + + TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { + if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || + (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */ + (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) || + (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) || + (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) || + (chk->rec.chunk_id.id == SCTP_SHUTDOWN) || + (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) || + (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) || + (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) || + (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) || + (chk->rec.chunk_id.id == SCTP_ECN_CWR) || + (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) { + /* Stray chunks must be cleaned up */ + clean_up_anyway: + TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); + if (chk->data) { + sctp_m_freem(chk->data); + chk->data = NULL; + } + asoc->ctrl_queue_cnt--; + if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) + asoc->fwd_tsn_cnt--; + sctp_free_a_chunk(stcb, chk, so_locked); + } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) { + /* special handling, we must look into the param */ + if (chk != asoc->str_reset) { + goto clean_up_anyway; + } + } + } +} + + +static int +sctp_can_we_split_this(struct sctp_tcb *stcb, + uint32_t length, + uint32_t goal_mtu, uint32_t frag_point, int eeor_on) +{ + /* Make a decision on if I should split a + * msg into multiple parts. This is only asked of + * incomplete messages. + */ + if (eeor_on) { + /* If we are doing EEOR we need to always send + * it if its the entire thing, since it might + * be all the guy is putting in the hopper. + */ + if (goal_mtu >= length) { + /*- + * If we have data outstanding, + * we get another chance when the sack + * arrives to transmit - wait for more data + */ + if (stcb->asoc.total_flight == 0) { + /* If nothing is in flight, we zero + * the packet counter. + */ + return (length); + } + return (0); + + } else { + /* You can fill the rest */ + return (goal_mtu); + } + } + /*- + * For those strange folk that make the send buffer + * smaller than our fragmentation point, we can't + * get a full msg in so we have to allow splitting. + */ + if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) { + return (length); + } + + if ((length <= goal_mtu) || + ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) { + /* Sub-optimial residual don't split in non-eeor mode. */ + return (0); + } + /* If we reach here length is larger + * than the goal_mtu. Do we wish to split + * it for the sake of packet putting together? + */ + if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) { + /* Its ok to split it */ + return (min(goal_mtu, frag_point)); + } + /* Nope, can't split */ + return (0); + +} + +static uint32_t +sctp_move_to_outqueue(struct sctp_tcb *stcb, + struct sctp_stream_out *strq, + uint32_t goal_mtu, + uint32_t frag_point, + int *locked, + int *giveup, + int eeor_mode, + int *bail, + int so_locked +#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) + SCTP_UNUSED +#endif + ) +{ + /* Move from the stream to the send_queue keeping track of the total */ + struct sctp_association *asoc; + struct sctp_stream_queue_pending *sp; + struct sctp_tmit_chunk *chk; + struct sctp_data_chunk *dchkh; + uint32_t to_move, length; + uint8_t rcv_flags = 0; + uint8_t some_taken; + uint8_t send_lock_up = 0; + + SCTP_TCB_LOCK_ASSERT(stcb); + asoc = &stcb->asoc; +one_more_time: + /*sa_ignore FREED_MEMORY*/ + sp = TAILQ_FIRST(&strq->outqueue); + if (sp == NULL) { + *locked = 0; + if (send_lock_up == 0) { + SCTP_TCB_SEND_LOCK(stcb); + send_lock_up = 1; + } + sp = TAILQ_FIRST(&strq->outqueue); + if (sp) { + goto one_more_time; + } + if (strq->last_msg_incomplete) { + SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n", + strq->stream_no, + strq->last_msg_incomplete); + strq->last_msg_incomplete = 0; + } + to_move = 0; + if (send_lock_up) { + SCTP_TCB_SEND_UNLOCK(stcb); + send_lock_up = 0; + } + goto out_of; + } + if ((sp->msg_is_complete) && (sp->length == 0)) { + if (sp->sender_all_done) { + /* We are doing differed cleanup. Last + * time through when we took all the data + * the sender_all_done was not set. + */ + if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) { + SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n"); + SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n", + sp->sender_all_done, + sp->length, + sp->msg_is_complete, + sp->put_last_out, + send_lock_up); + } + if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) { + SCTP_TCB_SEND_LOCK(stcb); + send_lock_up = 1; + } + atomic_subtract_int(&asoc->stream_queue_cnt, 1); + TAILQ_REMOVE(&strq->outqueue, sp, next); + stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up); + if (sp->net) { + sctp_free_remote_addr(sp->net); + sp->net = NULL; + } + if (sp->data) { + sctp_m_freem(sp->data); + sp->data = NULL; + } + sctp_free_a_strmoq(stcb, sp, so_locked); + /* we can't be locked to it */ + *locked = 0; + stcb->asoc.locked_on_sending = NULL; + if (send_lock_up) { + SCTP_TCB_SEND_UNLOCK(stcb); + send_lock_up = 0; + } + /* back to get the next msg */ + goto one_more_time; + } else { + /* sender just finished this but + * still holds a reference + */ + *locked = 1; + *giveup = 1; + to_move = 0; + goto out_of; + } + } else { + /* is there some to get */ + if (sp->length == 0) { + /* no */ + *locked = 1; + *giveup = 1; + to_move = 0; + goto out_of; + } else if (sp->discard_rest) { + if (send_lock_up == 0) { + SCTP_TCB_SEND_LOCK(stcb); + send_lock_up = 1; + } + /* Whack down the size */ + atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length); + if ((stcb->sctp_socket != NULL) && \ + ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || + (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { + atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length); + } + if (sp->data) { + sctp_m_freem(sp->data); + sp->data = NULL; + sp->tail_mbuf = NULL; + } + sp->length = 0; + sp->some_taken = 1; + *locked = 1; + *giveup = 1; + to_move = 0; + goto out_of; + } + } + some_taken = sp->some_taken; + if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) { + sp->msg_is_complete = 1; + } +re_look: + length = sp->length; + if (sp->msg_is_complete) { + /* The message is complete */ + to_move = min(length, frag_point); + if (to_move == length) { + /* All of it fits in the MTU */ + if (sp->some_taken) { + rcv_flags |= SCTP_DATA_LAST_FRAG; + sp->put_last_out = 1; + } else { + rcv_flags |= SCTP_DATA_NOT_FRAG; + sp->put_last_out = 1; + } + } else { + /* Not all of it fits, we fragment */ + if (sp->some_taken == 0) { + rcv_flags |= SCTP_DATA_FIRST_FRAG; + } + sp->some_taken = 1; + } + } else { + to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode); + if (to_move) { + /*- + * We use a snapshot of length in case it + * is expanding during the compare. + */ + uint32_t llen; + + llen = length; + if (to_move >= llen) { + to_move = llen; + if (send_lock_up == 0) { + /*- + * We are taking all of an incomplete msg + * thus we need a send lock. + */ + SCTP_TCB_SEND_LOCK(stcb); + send_lock_up = 1; + if (sp->msg_is_complete) { + /* the sender finished the msg */ + goto re_look; + } + } + } + if (sp->some_taken == 0) { + rcv_flags |= SCTP_DATA_FIRST_FRAG; + sp->some_taken = 1; + } + } else { + /* Nothing to take. */ + if (sp->some_taken) { + *locked = 1; + } + *giveup = 1; + to_move = 0; + goto out_of; + } + } + + /* If we reach here, we can copy out a chunk */ + sctp_alloc_a_chunk(stcb, chk); + if (chk == NULL) { + /* No chunk memory */ + *giveup = 1; + to_move = 0; + goto out_of; + } + /* Setup for unordered if needed by looking + * at the user sent info flags. + */ + if (sp->sinfo_flags & SCTP_UNORDERED) { + rcv_flags |= SCTP_DATA_UNORDERED; + } + if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) || + ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) { + rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY; + } + /* clear out the chunk before setting up */ + memset(chk, 0, sizeof(*chk)); + chk->rec.data.rcv_flags = rcv_flags; + + if (to_move >= length) { + /* we think we can steal the whole thing */ + if ((sp->sender_all_done == 0) && (send_lock_up == 0)) { + SCTP_TCB_SEND_LOCK(stcb); + send_lock_up = 1; + } + if (to_move < sp->length) { + /* bail, it changed */ + goto dont_do_it; + } + chk->data = sp->data; + chk->last_mbuf = sp->tail_mbuf; + /* register the stealing */ + sp->data = sp->tail_mbuf = NULL; + } else { + struct mbuf *m; + dont_do_it: + chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT); + chk->last_mbuf = NULL; + if (chk->data == NULL) { + sp->some_taken = some_taken; + sctp_free_a_chunk(stcb, chk, so_locked); + *bail = 1; + to_move = 0; + goto out_of; + } +#ifdef SCTP_MBUF_LOGGING + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { + sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY); + } +#endif + /* Pull off the data */ + m_adj(sp->data, to_move); + /* Now lets work our way down and compact it */ + m = sp->data; + while (m && (SCTP_BUF_LEN(m) == 0)) { + sp->data = SCTP_BUF_NEXT(m); + SCTP_BUF_NEXT(m) = NULL; + if (sp->tail_mbuf == m) { + /*- + * Freeing tail? TSNH since + * we supposedly were taking less + * than the sp->length. + */ +#ifdef INVARIANTS + panic("Huh, freing tail? - TSNH"); +#else + SCTP_PRINTF("Huh, freeing tail? - TSNH\n"); + sp->tail_mbuf = sp->data = NULL; + sp->length = 0; +#endif + + } + sctp_m_free(m); + m = sp->data; + } + } + if (SCTP_BUF_IS_EXTENDED(chk->data)) { + chk->copy_by_ref = 1; + } else { + chk->copy_by_ref = 0; + } + /* get last_mbuf and counts of mb useage + * This is ugly but hopefully its only one mbuf. + */ + if (chk->last_mbuf == NULL) { + chk->last_mbuf = chk->data; + while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) { + chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf); + } + } + + if (to_move > length) { + /*- This should not happen either + * since we always lower to_move to the size + * of sp->length if its larger. + */ +#ifdef INVARIANTS + panic("Huh, how can to_move be larger?"); +#else + SCTP_PRINTF("Huh, how can to_move be larger?\n"); + sp->length = 0; +#endif + } else { + atomic_subtract_int(&sp->length, to_move); + } + if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) { + /* Not enough room for a chunk header, get some */ + struct mbuf *m; + + m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA); + if (m == NULL) { + /* + * we're in trouble here. _PREPEND below will free + * all the data if there is no leading space, so we + * must put the data back and restore. + */ + if (send_lock_up == 0) { + SCTP_TCB_SEND_LOCK(stcb); + send_lock_up = 1; + } + if (sp->data == NULL) { + /* unsteal the data */ + sp->data = chk->data; + sp->tail_mbuf = chk->last_mbuf; + } else { + struct mbuf *m_tmp; + /* reassemble the data */ + m_tmp = sp->data; + sp->data = chk->data; + SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp; + } + sp->some_taken = some_taken; + atomic_add_int(&sp->length, to_move); + chk->data = NULL; + *bail = 1; + sctp_free_a_chunk(stcb, chk, so_locked); + to_move = 0; + goto out_of; + } else { + SCTP_BUF_LEN(m) = 0; + SCTP_BUF_NEXT(m) = chk->data; + chk->data = m; + M_ALIGN(chk->data, 4); + } + } + SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT); + if (chk->data == NULL) { + /* HELP, TSNH since we assured it would not above? */ +#ifdef INVARIANTS + panic("prepend failes HELP?"); +#else + SCTP_PRINTF("prepend fails HELP?\n"); + sctp_free_a_chunk(stcb, chk, so_locked); +#endif + *bail = 1; + to_move = 0; + goto out_of; + } + sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk)); + chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk)); + chk->book_size_scale = 0; + chk->sent = SCTP_DATAGRAM_UNSENT; + + chk->flags = 0; + chk->asoc = &stcb->asoc; + chk->pad_inplace = 0; + chk->no_fr_allowed = 0; + chk->rec.data.stream_seq = strq->next_sequence_send; + if ((rcv_flags & SCTP_DATA_LAST_FRAG) && + !(rcv_flags & SCTP_DATA_UNORDERED)) { + strq->next_sequence_send++; + } + chk->rec.data.stream_number = sp->stream; + chk->rec.data.payloadtype = sp->ppid; + chk->rec.data.context = sp->context; + chk->rec.data.doing_fast_retransmit = 0; + + chk->rec.data.timetodrop = sp->ts; + chk->flags = sp->act_flags; + + if (sp->net) { + chk->whoTo = sp->net; + atomic_add_int(&chk->whoTo->ref_count, 1); + } else + chk->whoTo = NULL; + + if (sp->holds_key_ref) { + chk->auth_keyid = sp->auth_keyid; + sctp_auth_key_acquire(stcb, chk->auth_keyid); + chk->holds_key_ref = 1; + } +#if defined(__FreeBSD__) || defined(__Panda__) + chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1); +#else + chk->rec.data.TSN_seq = asoc->sending_seq++; +#endif + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) { + sctp_misc_ints(SCTP_STRMOUT_LOG_SEND, + (uintptr_t)stcb, sp->length, + (uint32_t)((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq), + chk->rec.data.TSN_seq); + } + dchkh = mtod(chk->data, struct sctp_data_chunk *); + /* + * Put the rest of the things in place now. Size was done + * earlier in previous loop prior to padding. + */ + +#ifdef SCTP_ASOCLOG_OF_TSNS + SCTP_TCB_LOCK_ASSERT(stcb); + if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) { + asoc->tsn_out_at = 0; + asoc->tsn_out_wrapped = 1; + } + asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq; + asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number; + asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq; + asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size; + asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags; + asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb; + asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at; + asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2; + asoc->tsn_out_at++; +#endif + + dchkh->ch.chunk_type = SCTP_DATA; + dchkh->ch.chunk_flags = chk->rec.data.rcv_flags; + dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq); + dchkh->dp.stream_id = htons(strq->stream_no); + dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq); + dchkh->dp.protocol_id = chk->rec.data.payloadtype; + dchkh->ch.chunk_length = htons(chk->send_size); + /* Now advance the chk->send_size by the actual pad needed. */ + if (chk->send_size < SCTP_SIZE32(chk->book_size)) { + /* need a pad */ + struct mbuf *lm; + int pads; + + pads = SCTP_SIZE32(chk->book_size) - chk->send_size; + lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf); + if (lm != NULL) { + chk->last_mbuf = lm; + chk->pad_inplace = 1; + } + chk->send_size += pads; + } + if (PR_SCTP_ENABLED(chk->flags)) { + asoc->pr_sctp_cnt++; + } + if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) { + /* All done pull and kill the message */ + atomic_subtract_int(&asoc->stream_queue_cnt, 1); + if (sp->put_last_out == 0) { + SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n"); + SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n", + sp->sender_all_done, + sp->length, + sp->msg_is_complete, + sp->put_last_out, + send_lock_up); + } + if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) { + SCTP_TCB_SEND_LOCK(stcb); + send_lock_up = 1; + } + TAILQ_REMOVE(&strq->outqueue, sp, next); + stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up); + if (sp->net) { + sctp_free_remote_addr(sp->net); + sp->net = NULL; + } + if (sp->data) { + sctp_m_freem(sp->data); + sp->data = NULL; + } + sctp_free_a_strmoq(stcb, sp, so_locked); + + /* we can't be locked to it */ + *locked = 0; + stcb->asoc.locked_on_sending = NULL; + } else { + /* more to go, we are locked */ + *locked = 1; + } + asoc->chunks_on_out_queue++; + strq->chunks_on_queues++; + TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next); + asoc->send_queue_cnt++; +out_of: + if (send_lock_up) { + SCTP_TCB_SEND_UNLOCK(stcb); + } + return (to_move); +} + + +static void +sctp_fill_outqueue(struct sctp_tcb *stcb, + struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked +#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) + SCTP_UNUSED +#endif +) +{ + struct sctp_association *asoc; + struct sctp_stream_out *strq; + int goal_mtu, moved_how_much, total_moved = 0, bail = 0; + int locked, giveup; + + SCTP_TCB_LOCK_ASSERT(stcb); + asoc = &stcb->asoc; + switch (net->ro._l_addr.sa.sa_family) { +#ifdef INET + case AF_INET: + goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; + break; +#endif +#ifdef INET6 + case AF_INET6: + goal_mtu = net->mtu - SCTP_MIN_OVERHEAD; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + goal_mtu = net->mtu - sizeof(struct sctphdr); + break; +#endif + default: + /* TSNH */ + goal_mtu = net->mtu; + break; + } + /* Need an allowance for the data chunk header too */ + goal_mtu -= sizeof(struct sctp_data_chunk); + + /* must make even word boundary */ + goal_mtu &= 0xfffffffc; + if (asoc->locked_on_sending) { + /* We are stuck on one stream until the message completes. */ + strq = asoc->locked_on_sending; + locked = 1; + } else { + strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc); + locked = 0; + } + while ((goal_mtu > 0) && strq) { + giveup = 0; + bail = 0; + moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked, + &giveup, eeor_mode, &bail, so_locked); + if (moved_how_much) + stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much); + + if (locked) { + asoc->locked_on_sending = strq; + if ((moved_how_much == 0) || (giveup) || bail) + /* no more to move for now */ + break; + } else { + asoc->locked_on_sending = NULL; + if ((giveup) || bail) { + break; + } + strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc); + if (strq == NULL) { + break; + } + } + total_moved += moved_how_much; + goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk)); + goal_mtu &= 0xfffffffc; + } + if (bail) + *quit_now = 1; + + stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc); + + if (total_moved == 0) { + if ((stcb->asoc.sctp_cmt_on_off == 0) && + (net == stcb->asoc.primary_destination)) { + /* ran dry for primary network net */ + SCTP_STAT_INCR(sctps_primary_randry); + } else if (stcb->asoc.sctp_cmt_on_off > 0) { + /* ran dry with CMT on */ + SCTP_STAT_INCR(sctps_cmt_randry); + } + } +} + +void +sctp_fix_ecn_echo(struct sctp_association *asoc) +{ + struct sctp_tmit_chunk *chk; + + TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { + if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) { + chk->sent = SCTP_DATAGRAM_UNSENT; + } + } +} + +void +sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net) +{ + struct sctp_association *asoc; + struct sctp_tmit_chunk *chk; + struct sctp_stream_queue_pending *sp; + unsigned int i; + + if (net == NULL) { + return; + } + asoc = &stcb->asoc; + for (i = 0; i < stcb->asoc.streamoutcnt; i++) { + TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) { + if (sp->net == net) { + sctp_free_remote_addr(sp->net); + sp->net = NULL; + } + } + } + TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) { + if (chk->whoTo == net) { + sctp_free_remote_addr(chk->whoTo); + chk->whoTo = NULL; + } + } +} + +int +sctp_med_chunk_output(struct sctp_inpcb *inp, + struct sctp_tcb *stcb, + struct sctp_association *asoc, + int *num_out, + int *reason_code, + int control_only, int from_where, + struct timeval *now, int *now_filled, int frag_point, int so_locked +#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) + SCTP_UNUSED +#endif + ) +{ + /** + * Ok this is the generic chunk service queue. we must do the + * following: - Service the stream queue that is next, moving any + * message (note I must get a complete message i.e. FIRST/MIDDLE and + * LAST to the out queue in one pass) and assigning TSN's - Check to + * see if the cwnd/rwnd allows any output, if so we go ahead and + * fomulate and send the low level chunks. Making sure to combine + * any control in the control chunk queue also. + */ + struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL; + struct mbuf *outchain, *endoutchain; + struct sctp_tmit_chunk *chk, *nchk; + + /* temp arrays for unlinking */ + struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING]; + int no_fragmentflg, error; + unsigned int max_rwnd_per_dest, max_send_per_dest; + int one_chunk, hbflag, skip_data_for_this_net; + int asconf, cookie, no_out_cnt; + int bundle_at, ctl_cnt, no_data_chunks, eeor_mode; + unsigned int mtu, r_mtu, omtu, mx_mtu, to_out; + int tsns_sent = 0; + uint32_t auth_offset = 0; + struct sctp_auth_chunk *auth = NULL; + uint16_t auth_keyid; + int override_ok = 1; + int skip_fill_up = 0; + int data_auth_reqd = 0; + /* JRS 5/14/07 - Add flag for whether a heartbeat is sent to + the destination. */ + int quit_now = 0; + +#if defined(__APPLE__) + if (so_locked) { + sctp_lock_assert(SCTP_INP_SO(inp)); + } else { + sctp_unlock_assert(SCTP_INP_SO(inp)); + } +#endif + *num_out = 0; + *reason_code = 0; + auth_keyid = stcb->asoc.authinfo.active_keyid; + if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) || + (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) || + (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) { + eeor_mode = 1; + } else { + eeor_mode = 0; + } + ctl_cnt = no_out_cnt = asconf = cookie = 0; + /* + * First lets prime the pump. For each destination, if there is room + * in the flight size, attempt to pull an MTU's worth out of the + * stream queues into the general send_queue + */ +#ifdef SCTP_AUDITING_ENABLED + sctp_audit_log(0xC2, 2); +#endif + SCTP_TCB_LOCK_ASSERT(stcb); + hbflag = 0; + if ((control_only) || (asoc->stream_reset_outstanding)) + no_data_chunks = 1; + else + no_data_chunks = 0; + + /* Nothing to possible to send? */ + if ((TAILQ_EMPTY(&asoc->control_send_queue) || + (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) && + TAILQ_EMPTY(&asoc->asconf_send_queue) && + TAILQ_EMPTY(&asoc->send_queue) && + stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) { + nothing_to_send: + *reason_code = 9; + return (0); + } + if (asoc->peers_rwnd == 0) { + /* No room in peers rwnd */ + *reason_code = 1; + if (asoc->total_flight > 0) { + /* we are allowed one chunk in flight */ + no_data_chunks = 1; + } + } + if (stcb->asoc.ecn_echo_cnt_onq) { + /* Record where a sack goes, if any */ + if (no_data_chunks && + (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) { + /* Nothing but ECNe to send - we don't do that */ + goto nothing_to_send; + } + TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { + if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || + (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) { + sack_goes_to = chk->whoTo; + break; + } + } + } + max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets); + if (stcb->sctp_socket) + max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets; + else + max_send_per_dest = 0; + if (no_data_chunks == 0) { + /* How many non-directed chunks are there? */ + TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) { + if (chk->whoTo == NULL) { + /* We already have non-directed + * chunks on the queue, no need + * to do a fill-up. + */ + skip_fill_up = 1; + break; + } + } + + } + if ((no_data_chunks == 0) && + (skip_fill_up == 0) && + (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) { + TAILQ_FOREACH(net, &asoc->nets, sctp_next) { + /* + * This for loop we are in takes in + * each net, if its's got space in cwnd and + * has data sent to it (when CMT is off) then it + * calls sctp_fill_outqueue for the net. This gets + * data on the send queue for that network. + * + * In sctp_fill_outqueue TSN's are assigned and + * data is copied out of the stream buffers. Note + * mostly copy by reference (we hope). + */ + net->window_probe = 0; + if ((net != stcb->asoc.alternate) && + ((net->dest_state & SCTP_ADDR_PF) || + (!(net->dest_state & SCTP_ADDR_REACHABLE)) || + (net->dest_state & SCTP_ADDR_UNCONFIRMED))) { + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { + sctp_log_cwnd(stcb, net, 1, + SCTP_CWND_LOG_FILL_OUTQ_CALLED); + } + continue; + } + if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) && + (net->flight_size == 0)) { + (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins)(stcb, net); + } + if (net->flight_size >= net->cwnd) { + /* skip this network, no room - can't fill */ + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { + sctp_log_cwnd(stcb, net, 3, + SCTP_CWND_LOG_FILL_OUTQ_CALLED); + } + continue; + } + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { + sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED); + } + sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked); + if (quit_now) { + /* memory alloc failure */ + no_data_chunks = 1; + break; + } + } + } + /* now service each destination and send out what we can for it */ + /* Nothing to send? */ + if (TAILQ_EMPTY(&asoc->control_send_queue) && + TAILQ_EMPTY(&asoc->asconf_send_queue) && + TAILQ_EMPTY(&asoc->send_queue)) { + *reason_code = 8; + return (0); + } + + if (asoc->sctp_cmt_on_off > 0) { + /* get the last start point */ + start_at = asoc->last_net_cmt_send_started; + if (start_at == NULL) { + /* null so to beginning */ + start_at = TAILQ_FIRST(&asoc->nets); + } else { + start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next); + if (start_at == NULL) { + start_at = TAILQ_FIRST(&asoc->nets); + } + } + asoc->last_net_cmt_send_started = start_at; + } else { + start_at = TAILQ_FIRST(&asoc->nets); + } + TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { + if (chk->whoTo == NULL) { + if (asoc->alternate) { + chk->whoTo = asoc->alternate; + } else { + chk->whoTo = asoc->primary_destination; + } + atomic_add_int(&chk->whoTo->ref_count, 1); + } + } + old_start_at = NULL; +again_one_more_time: + for (net = start_at ; net != NULL; net = TAILQ_NEXT(net, sctp_next)) { + /* how much can we send? */ + /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */ + if (old_start_at && (old_start_at == net)) { + /* through list ocmpletely. */ + break; + } + tsns_sent = 0xa; + if (TAILQ_EMPTY(&asoc->control_send_queue) && + TAILQ_EMPTY(&asoc->asconf_send_queue) && + (net->flight_size >= net->cwnd)) { + /* Nothing on control or asconf and flight is full, we can skip + * even in the CMT case. + */ + continue; + } + bundle_at = 0; + endoutchain = outchain = NULL; + no_fragmentflg = 1; + one_chunk = 0; + if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { + skip_data_for_this_net = 1; + } else { + skip_data_for_this_net = 0; + } + switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) { +#ifdef INET + case AF_INET: + mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr)); + break; +#endif +#ifdef INET6 + case AF_INET6: + mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)); + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + mtu = net->mtu - sizeof(struct sctphdr); + break; +#endif + default: + /* TSNH */ + mtu = net->mtu; + break; + } + mx_mtu = mtu; + to_out = 0; + if (mtu > asoc->peers_rwnd) { + if (asoc->total_flight > 0) { + /* We have a packet in flight somewhere */ + r_mtu = asoc->peers_rwnd; + } else { + /* We are always allowed to send one MTU out */ + one_chunk = 1; + r_mtu = mtu; + } + } else { + r_mtu = mtu; + } + /************************/ + /* ASCONF transmission */ + /************************/ + /* Now first lets go through the asconf queue */ + TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { + if (chk->rec.chunk_id.id != SCTP_ASCONF) { + continue; + } + if (chk->whoTo == NULL) { + if (asoc->alternate == NULL) { + if (asoc->primary_destination != net) { + break; + } + } else { + if (asoc->alternate != net) { + break; + } + } + } else { + if (chk->whoTo != net) { + break; + } + } + if (chk->data == NULL) { + break; + } + if (chk->sent != SCTP_DATAGRAM_UNSENT && + chk->sent != SCTP_DATAGRAM_RESEND) { + break; + } + /* + * if no AUTH is yet included and this chunk + * requires it, make sure to account for it. We + * don't apply the size until the AUTH chunk is + * actually added below in case there is no room for + * this chunk. NOTE: we overload the use of "omtu" + * here + */ + if ((auth == NULL) && + sctp_auth_is_required_chunk(chk->rec.chunk_id.id, + stcb->asoc.peer_auth_chunks)) { + omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); + } else + omtu = 0; + /* Here we do NOT factor the r_mtu */ + if ((chk->send_size < (int)(mtu - omtu)) || + (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { + /* + * We probably should glom the mbuf chain + * from the chk->data for control but the + * problem is it becomes yet one more level + * of tracking to do if for some reason + * output fails. Then I have got to + * reconstruct the merged control chain.. el + * yucko.. for now we take the easy way and + * do the copy + */ + /* + * Add an AUTH chunk, if chunk requires it + * save the offset into the chain for AUTH + */ + if ((auth == NULL) && + (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, + stcb->asoc.peer_auth_chunks))) { + outchain = sctp_add_auth_chunk(outchain, + &endoutchain, + &auth, + &auth_offset, + stcb, + chk->rec.chunk_id.id); + SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); + } + outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, + (int)chk->rec.chunk_id.can_take_data, + chk->send_size, chk->copy_by_ref); + if (outchain == NULL) { + *reason_code = 8; + SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + return (ENOMEM); + } + SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); + /* update our MTU size */ + if (mtu > (chk->send_size + omtu)) + mtu -= (chk->send_size + omtu); + else + mtu = 0; + to_out += (chk->send_size + omtu); + /* Do clear IP_DF ? */ + if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { + no_fragmentflg = 0; + } + if (chk->rec.chunk_id.can_take_data) + chk->data = NULL; + /* + * set hb flag since we can + * use these for RTO + */ + hbflag = 1; + asconf = 1; + /* + * should sysctl this: don't + * bundle data with ASCONF + * since it requires AUTH + */ + no_data_chunks = 1; + chk->sent = SCTP_DATAGRAM_SENT; + if (chk->whoTo == NULL) { + chk->whoTo = net; + atomic_add_int(&net->ref_count, 1); + } + chk->snd_count++; + if (mtu == 0) { + /* + * Ok we are out of room but we can + * output without effecting the + * flight size since this little guy + * is a control only packet. + */ + sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net); + /* + * do NOT clear the asconf + * flag as it is used to do + * appropriate source address + * selection. + */ + if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, + (struct sockaddr *)&net->ro._l_addr, + outchain, auth_offset, auth, + stcb->asoc.authinfo.active_keyid, + no_fragmentflg, 0, asconf, + inp->sctp_lport, stcb->rport, + htonl(stcb->asoc.peer_vtag), + net->port, NULL, +#if defined(__FreeBSD__) + 0, 0, +#endif + so_locked))) { + if (error == ENOBUFS) { + asoc->ifp_had_enobuf = 1; + SCTP_STAT_INCR(sctps_lowlevelerr); + } + if (from_where == 0) { + SCTP_STAT_INCR(sctps_lowlevelerrusr); + } + if (*now_filled == 0) { + (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); + *now_filled = 1; + *now = net->last_sent_time; + } else { + net->last_sent_time = *now; + } + hbflag = 0; + /* error, could not output */ + if (error == EHOSTUNREACH) { + /* + * Destination went + * unreachable + * during this send + */ + sctp_move_chunks_from_net(stcb, net); + } + *reason_code = 7; + continue; + } else + asoc->ifp_had_enobuf = 0; + if (*now_filled == 0) { + (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); + *now_filled = 1; + *now = net->last_sent_time; + } else { + net->last_sent_time = *now; + } + hbflag = 0; + /* + * increase the number we sent, if a + * cookie is sent we don't tell them + * any was sent out. + */ + outchain = endoutchain = NULL; + auth = NULL; + auth_offset = 0; + if (!no_out_cnt) + *num_out += ctl_cnt; + /* recalc a clean slate and setup */ + switch (net->ro._l_addr.sa.sa_family) { +#ifdef INET + case AF_INET: + mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; + break; +#endif +#ifdef INET6 + case AF_INET6: + mtu = net->mtu - SCTP_MIN_OVERHEAD; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + mtu = net->mtu - sizeof(struct sctphdr); + break; +#endif + default: + /* TSNH */ + mtu = net->mtu; + break; + } + to_out = 0; + no_fragmentflg = 1; + } + } + } + /************************/ + /* Control transmission */ + /************************/ + /* Now first lets go through the control queue */ + TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { + if ((sack_goes_to) && + (chk->rec.chunk_id.id == SCTP_ECN_ECHO) && + (chk->whoTo != sack_goes_to)) { + /* + * if we have a sack in queue, and we are looking at an + * ecn echo that is NOT queued to where the sack is going.. + */ + if (chk->whoTo == net) { + /* Don't transmit it to where its going (current net) */ + continue; + } else if (sack_goes_to == net) { + /* But do transmit it to this address */ + goto skip_net_check; + } + } + if (chk->whoTo == NULL) { + if (asoc->alternate == NULL) { + if (asoc->primary_destination != net) { + continue; + } + } else { + if (asoc->alternate != net) { + continue; + } + } + } else { + if (chk->whoTo != net) { + continue; + } + } + skip_net_check: + if (chk->data == NULL) { + continue; + } + if (chk->sent != SCTP_DATAGRAM_UNSENT) { + /* + * It must be unsent. Cookies and ASCONF's + * hang around but there timers will force + * when marked for resend. + */ + continue; + } + /* + * if no AUTH is yet included and this chunk + * requires it, make sure to account for it. We + * don't apply the size until the AUTH chunk is + * actually added below in case there is no room for + * this chunk. NOTE: we overload the use of "omtu" + * here + */ + if ((auth == NULL) && + sctp_auth_is_required_chunk(chk->rec.chunk_id.id, + stcb->asoc.peer_auth_chunks)) { + omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); + } else + omtu = 0; + /* Here we do NOT factor the r_mtu */ + if ((chk->send_size <= (int)(mtu - omtu)) || + (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { + /* + * We probably should glom the mbuf chain + * from the chk->data for control but the + * problem is it becomes yet one more level + * of tracking to do if for some reason + * output fails. Then I have got to + * reconstruct the merged control chain.. el + * yucko.. for now we take the easy way and + * do the copy + */ + /* + * Add an AUTH chunk, if chunk requires it + * save the offset into the chain for AUTH + */ + if ((auth == NULL) && + (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, + stcb->asoc.peer_auth_chunks))) { + outchain = sctp_add_auth_chunk(outchain, + &endoutchain, + &auth, + &auth_offset, + stcb, + chk->rec.chunk_id.id); + SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); + } + outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, + (int)chk->rec.chunk_id.can_take_data, + chk->send_size, chk->copy_by_ref); + if (outchain == NULL) { + *reason_code = 8; + SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + return (ENOMEM); + } + SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); + /* update our MTU size */ + if (mtu > (chk->send_size + omtu)) + mtu -= (chk->send_size + omtu); + else + mtu = 0; + to_out += (chk->send_size + omtu); + /* Do clear IP_DF ? */ + if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { + no_fragmentflg = 0; + } + if (chk->rec.chunk_id.can_take_data) + chk->data = NULL; + /* Mark things to be removed, if needed */ + if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || + (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */ + (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) || + (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) || + (chk->rec.chunk_id.id == SCTP_SHUTDOWN) || + (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) || + (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) || + (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) || + (chk->rec.chunk_id.id == SCTP_ECN_CWR) || + (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) || + (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) { + if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) { + hbflag = 1; + } + /* remove these chunks at the end */ + if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || + (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) { + /* turn off the timer */ + if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) { + sctp_timer_stop(SCTP_TIMER_TYPE_RECV, + inp, stcb, net, SCTP_FROM_SCTP_OUTPUT+SCTP_LOC_1); + } + } + ctl_cnt++; + } else { + /* + * Other chunks, since they have + * timers running (i.e. COOKIE) + * we just "trust" that it + * gets sent or retransmitted. + */ + ctl_cnt++; + if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { + cookie = 1; + no_out_cnt = 1; + } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) { + /* + * Increment ecne send count here + * this means we may be over-zealous in + * our counting if the send fails, but its + * the best place to do it (we used to do + * it in the queue of the chunk, but that did + * not tell how many times it was sent. + */ + SCTP_STAT_INCR(sctps_sendecne); + } + chk->sent = SCTP_DATAGRAM_SENT; + if (chk->whoTo == NULL) { + chk->whoTo = net; + atomic_add_int(&net->ref_count, 1); + } + chk->snd_count++; + } + if (mtu == 0) { + /* + * Ok we are out of room but we can + * output without effecting the + * flight size since this little guy + * is a control only packet. + */ + if (asconf) { + sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net); + /* + * do NOT clear the asconf + * flag as it is used to do + * appropriate source address + * selection. + */ + } + if (cookie) { + sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net); + cookie = 0; + } + if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, + (struct sockaddr *)&net->ro._l_addr, + outchain, + auth_offset, auth, + stcb->asoc.authinfo.active_keyid, + no_fragmentflg, 0, asconf, + inp->sctp_lport, stcb->rport, + htonl(stcb->asoc.peer_vtag), + net->port, NULL, +#if defined(__FreeBSD__) + 0, 0, +#endif + so_locked))) { + if (error == ENOBUFS) { + asoc->ifp_had_enobuf = 1; + SCTP_STAT_INCR(sctps_lowlevelerr); + } + if (from_where == 0) { + SCTP_STAT_INCR(sctps_lowlevelerrusr); + } + /* error, could not output */ + if (hbflag) { + if (*now_filled == 0) { + (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); + *now_filled = 1; + *now = net->last_sent_time; + } else { + net->last_sent_time = *now; + } + hbflag = 0; + } + if (error == EHOSTUNREACH) { + /* + * Destination went + * unreachable + * during this send + */ + sctp_move_chunks_from_net(stcb, net); + } + *reason_code = 7; + continue; + } else + asoc->ifp_had_enobuf = 0; + /* Only HB or ASCONF advances time */ + if (hbflag) { + if (*now_filled == 0) { + (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); + *now_filled = 1; + *now = net->last_sent_time; + } else { + net->last_sent_time = *now; + } + hbflag = 0; + } + /* + * increase the number we sent, if a + * cookie is sent we don't tell them + * any was sent out. + */ + outchain = endoutchain = NULL; + auth = NULL; + auth_offset = 0; + if (!no_out_cnt) + *num_out += ctl_cnt; + /* recalc a clean slate and setup */ + switch (net->ro._l_addr.sa.sa_family) { +#ifdef INET + case AF_INET: + mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; + break; +#endif +#ifdef INET6 + case AF_INET6: + mtu = net->mtu - SCTP_MIN_OVERHEAD; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + mtu = net->mtu - sizeof(struct sctphdr); + break; +#endif + default: + /* TSNH */ + mtu = net->mtu; + break; + } + to_out = 0; + no_fragmentflg = 1; + } + } + } + /* JRI: if dest is in PF state, do not send data to it */ + if ((asoc->sctp_cmt_on_off > 0) && + (net != stcb->asoc.alternate) && + (net->dest_state & SCTP_ADDR_PF)) { + goto no_data_fill; + } + if (net->flight_size >= net->cwnd) { + goto no_data_fill; + } + if ((asoc->sctp_cmt_on_off > 0) && + (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) && + (net->flight_size > max_rwnd_per_dest)) { + goto no_data_fill; + } + /* + * We need a specific accounting for the usage of the + * send buffer. We also need to check the number of messages + * per net. For now, this is better than nothing and it + * disabled by default... + */ + if ((asoc->sctp_cmt_on_off > 0) && + (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) && + (max_send_per_dest > 0) && + (net->flight_size > max_send_per_dest)) { + goto no_data_fill; + } + /*********************/ + /* Data transmission */ + /*********************/ + /* + * if AUTH for DATA is required and no AUTH has been added + * yet, account for this in the mtu now... if no data can be + * bundled, this adjustment won't matter anyways since the + * packet will be going out... + */ + data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, + stcb->asoc.peer_auth_chunks); + if (data_auth_reqd && (auth == NULL)) { + mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); + } + /* now lets add any data within the MTU constraints */ + switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) { +#ifdef INET + case AF_INET: + if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr))) + omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr)); + else + omtu = 0; + break; +#endif +#ifdef INET6 + case AF_INET6: + if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr))) + omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)); + else + omtu = 0; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + if (net->mtu > sizeof(struct sctphdr)) { + omtu = net->mtu - sizeof(struct sctphdr); + } else { + omtu = 0; + } + break; +#endif + default: + /* TSNH */ + omtu = 0; + break; + } + if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) && + (skip_data_for_this_net == 0)) || + (cookie)) { + TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { + if (no_data_chunks) { + /* let only control go out */ + *reason_code = 1; + break; + } + if (net->flight_size >= net->cwnd) { + /* skip this net, no room for data */ + *reason_code = 2; + break; + } + if ((chk->whoTo != NULL) && + (chk->whoTo != net)) { + /* Don't send the chunk on this net */ + continue; + } + + if (asoc->sctp_cmt_on_off == 0) { + if ((asoc->alternate) && + (asoc->alternate != net) && + (chk->whoTo == NULL)) { + continue; + } else if ((net != asoc->primary_destination) && + (asoc->alternate == NULL) && + (chk->whoTo == NULL)) { + continue; + } + } + if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) { + /*- + * strange, we have a chunk that is + * to big for its destination and + * yet no fragment ok flag. + * Something went wrong when the + * PMTU changed...we did not mark + * this chunk for some reason?? I + * will fix it here by letting IP + * fragment it for now and printing + * a warning. This really should not + * happen ... + */ + SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n", + chk->send_size, mtu); + chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; + } + if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && + ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) { + struct sctp_data_chunk *dchkh; + + dchkh = mtod(chk->data, struct sctp_data_chunk *); + dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY; + } + if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) || + ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) { + /* ok we will add this one */ + + /* + * Add an AUTH chunk, if chunk + * requires it, save the offset into + * the chain for AUTH + */ + if (data_auth_reqd) { + if (auth == NULL) { + outchain = sctp_add_auth_chunk(outchain, + &endoutchain, + &auth, + &auth_offset, + stcb, + SCTP_DATA); + auth_keyid = chk->auth_keyid; + override_ok = 0; + SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); + } else if (override_ok) { + /* use this data's keyid */ + auth_keyid = chk->auth_keyid; + override_ok = 0; + } else if (auth_keyid != chk->auth_keyid) { + /* different keyid, so done bundling */ + break; + } + } + outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0, + chk->send_size, chk->copy_by_ref); + if (outchain == NULL) { + SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n"); + if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { + sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); + } + *reason_code = 3; + SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + return (ENOMEM); + } + /* upate our MTU size */ + /* Do clear IP_DF ? */ + if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { + no_fragmentflg = 0; + } + /* unsigned subtraction of mtu */ + if (mtu > chk->send_size) + mtu -= chk->send_size; + else + mtu = 0; + /* unsigned subtraction of r_mtu */ + if (r_mtu > chk->send_size) + r_mtu -= chk->send_size; + else + r_mtu = 0; + + to_out += chk->send_size; + if ((to_out > mx_mtu) && no_fragmentflg) { +#ifdef INVARIANTS + panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out); +#else + SCTP_PRINTF("Exceeding mtu of %d out size is %d\n", + mx_mtu, to_out); +#endif + } + chk->window_probe = 0; + data_list[bundle_at++] = chk; + if (bundle_at >= SCTP_MAX_DATA_BUNDLING) { + break; + } + if (chk->sent == SCTP_DATAGRAM_UNSENT) { + if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) { + SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks); + } else { + SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks); + } + if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) && + ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0)) + /* Count number of user msg's that were fragmented + * we do this by counting when we see a LAST fragment + * only. + */ + SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs); + } + if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) { + if ((one_chunk) && (stcb->asoc.total_flight == 0)) { + data_list[0]->window_probe = 1; + net->window_probe = 1; + } + break; + } + } else { + /* + * Must be sent in order of the + * TSN's (on a network) + */ + break; + } + } /* for (chunk gather loop for this net) */ + } /* if asoc.state OPEN */ + no_data_fill: + /* Is there something to send for this destination? */ + if (outchain) { + /* We may need to start a control timer or two */ + if (asconf) { + sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, + stcb, net); + /* + * do NOT clear the asconf flag as it is used + * to do appropriate source address selection. + */ + } + if (cookie) { + sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net); + cookie = 0; + } + /* must start a send timer if data is being sent */ + if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) { + /* + * no timer running on this destination + * restart it. + */ + sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); + } + /* Now send it, if there is anything to send :> */ + if ((error = sctp_lowlevel_chunk_output(inp, + stcb, + net, + (struct sockaddr *)&net->ro._l_addr, + outchain, + auth_offset, + auth, + auth_keyid, + no_fragmentflg, + bundle_at, + asconf, + inp->sctp_lport, stcb->rport, + htonl(stcb->asoc.peer_vtag), + net->port, NULL, +#if defined(__FreeBSD__) + 0, 0, +#endif + so_locked))) { + /* error, we could not output */ + if (error == ENOBUFS) { + SCTP_STAT_INCR(sctps_lowlevelerr); + asoc->ifp_had_enobuf = 1; + } + if (from_where == 0) { + SCTP_STAT_INCR(sctps_lowlevelerrusr); + } + SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error); + if (hbflag) { + if (*now_filled == 0) { + (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); + *now_filled = 1; + *now = net->last_sent_time; + } else { + net->last_sent_time = *now; + } + hbflag = 0; + } + if (error == EHOSTUNREACH) { + /* + * Destination went unreachable + * during this send + */ + sctp_move_chunks_from_net(stcb, net); + } + *reason_code = 6; + /*- + * I add this line to be paranoid. As far as + * I can tell the continue, takes us back to + * the top of the for, but just to make sure + * I will reset these again here. + */ + ctl_cnt = bundle_at = 0; + continue; /* This takes us back to the for() for the nets. */ + } else { + asoc->ifp_had_enobuf = 0; + } + endoutchain = NULL; + auth = NULL; + auth_offset = 0; + if (bundle_at || hbflag) { + /* For data/asconf and hb set time */ + if (*now_filled == 0) { + (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); + *now_filled = 1; + *now = net->last_sent_time; + } else { + net->last_sent_time = *now; + } + } + if (!no_out_cnt) { + *num_out += (ctl_cnt + bundle_at); + } + if (bundle_at) { + /* setup for a RTO measurement */ + tsns_sent = data_list[0]->rec.data.TSN_seq; + /* fill time if not already filled */ + if (*now_filled == 0) { + (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent); + *now_filled = 1; + *now = asoc->time_last_sent; + } else { + asoc->time_last_sent = *now; + } + if (net->rto_needed) { + data_list[0]->do_rtt = 1; + net->rto_needed = 0; + } + SCTP_STAT_INCR_BY(sctps_senddata, bundle_at); + sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net); + } + if (one_chunk) { + break; + } + } + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { + sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND); + } + } + if (old_start_at == NULL) { + old_start_at = start_at; + start_at = TAILQ_FIRST(&asoc->nets); + if (old_start_at) + goto again_one_more_time; + } + + /* + * At the end there should be no NON timed chunks hanging on this + * queue. + */ + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { + sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND); + } + if ((*num_out == 0) && (*reason_code == 0)) { + *reason_code = 4; + } else { + *reason_code = 5; + } + sctp_clean_up_ctl(stcb, asoc, so_locked); + return (0); +} + +void +sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err) +{ + /*- + * Prepend a OPERATIONAL_ERROR chunk header and put on the end of + * the control chunk queue. + */ + struct sctp_chunkhdr *hdr; + struct sctp_tmit_chunk *chk; + struct mbuf *mat; + + SCTP_TCB_LOCK_ASSERT(stcb); + sctp_alloc_a_chunk(stcb, chk); + if (chk == NULL) { + /* no memory */ + sctp_m_freem(op_err); + return; + } + chk->copy_by_ref = 0; + SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT); + if (op_err == NULL) { + sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); + return; + } + chk->send_size = 0; + for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) { + chk->send_size += SCTP_BUF_LEN(mat); + } + chk->sent = SCTP_DATAGRAM_UNSENT; + chk->snd_count = 0; + chk->asoc = &stcb->asoc; + chk->data = op_err; + chk->whoTo = NULL; + hdr = mtod(op_err, struct sctp_chunkhdr *); + hdr->chunk_type = SCTP_OPERATION_ERROR; + hdr->chunk_flags = 0; + hdr->chunk_length = htons(chk->send_size); + TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, + chk, + sctp_next); + chk->asoc->ctrl_queue_cnt++; +} + +int +sctp_send_cookie_echo(struct mbuf *m, + int offset, + struct sctp_tcb *stcb, + struct sctp_nets *net) +{ + /*- + * pull out the cookie and put it at the front of the control chunk + * queue. + */ + int at; + struct mbuf *cookie; + struct sctp_paramhdr parm, *phdr; + struct sctp_chunkhdr *hdr; + struct sctp_tmit_chunk *chk; + uint16_t ptype, plen; + + SCTP_TCB_LOCK_ASSERT(stcb); + /* First find the cookie in the param area */ + cookie = NULL; + at = offset + sizeof(struct sctp_init_chunk); + for (;;) { + phdr = sctp_get_next_param(m, at, &parm, sizeof(parm)); + if (phdr == NULL) { + return (-3); + } + ptype = ntohs(phdr->param_type); + plen = ntohs(phdr->param_length); + if (ptype == SCTP_STATE_COOKIE) { + int pad; + + /* found the cookie */ + if ((pad = (plen % 4))) { + plen += 4 - pad; + } + cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT); + if (cookie == NULL) { + /* No memory */ + return (-2); + } +#ifdef SCTP_MBUF_LOGGING + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { + sctp_log_mbc(cookie, SCTP_MBUF_ICOPY); + } +#endif + break; + } + at += SCTP_SIZE32(plen); + } + /* ok, we got the cookie lets change it into a cookie echo chunk */ + /* first the change from param to cookie */ + hdr = mtod(cookie, struct sctp_chunkhdr *); + hdr->chunk_type = SCTP_COOKIE_ECHO; + hdr->chunk_flags = 0; + /* get the chunk stuff now and place it in the FRONT of the queue */ + sctp_alloc_a_chunk(stcb, chk); + if (chk == NULL) { + /* no memory */ + sctp_m_freem(cookie); + return (-5); + } + chk->copy_by_ref = 0; + chk->rec.chunk_id.id = SCTP_COOKIE_ECHO; + chk->rec.chunk_id.can_take_data = 0; + chk->flags = CHUNK_FLAGS_FRAGMENT_OK; + chk->send_size = plen; + chk->sent = SCTP_DATAGRAM_UNSENT; + chk->snd_count = 0; + chk->asoc = &stcb->asoc; + chk->data = cookie; + chk->whoTo = net; + atomic_add_int(&chk->whoTo->ref_count, 1); + TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next); + chk->asoc->ctrl_queue_cnt++; + return (0); +} + +void +sctp_send_heartbeat_ack(struct sctp_tcb *stcb, + struct mbuf *m, + int offset, + int chk_length, + struct sctp_nets *net) +{ + /* + * take a HB request and make it into a HB ack and send it. + */ + struct mbuf *outchain; + struct sctp_chunkhdr *chdr; + struct sctp_tmit_chunk *chk; + + + if (net == NULL) + /* must have a net pointer */ + return; + + outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT); + if (outchain == NULL) { + /* gak out of memory */ + return; + } +#ifdef SCTP_MBUF_LOGGING + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { + sctp_log_mbc(outchain, SCTP_MBUF_ICOPY); + } +#endif + chdr = mtod(outchain, struct sctp_chunkhdr *); + chdr->chunk_type = SCTP_HEARTBEAT_ACK; + chdr->chunk_flags = 0; + if (chk_length % 4) { + /* need pad */ + uint32_t cpthis = 0; + int padlen; + + padlen = 4 - (chk_length % 4); + m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis); + } + sctp_alloc_a_chunk(stcb, chk); + if (chk == NULL) { + /* no memory */ + sctp_m_freem(outchain); + return; + } + chk->copy_by_ref = 0; + chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK; + chk->rec.chunk_id.can_take_data = 1; + chk->flags = 0; + chk->send_size = chk_length; + chk->sent = SCTP_DATAGRAM_UNSENT; + chk->snd_count = 0; + chk->asoc = &stcb->asoc; + chk->data = outchain; + chk->whoTo = net; + atomic_add_int(&chk->whoTo->ref_count, 1); + TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); + chk->asoc->ctrl_queue_cnt++; +} + +void +sctp_send_cookie_ack(struct sctp_tcb *stcb) +{ + /* formulate and queue a cookie-ack back to sender */ + struct mbuf *cookie_ack; + struct sctp_chunkhdr *hdr; + struct sctp_tmit_chunk *chk; + + SCTP_TCB_LOCK_ASSERT(stcb); + + cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER); + if (cookie_ack == NULL) { + /* no mbuf's */ + return; + } + SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD); + sctp_alloc_a_chunk(stcb, chk); + if (chk == NULL) { + /* no memory */ + sctp_m_freem(cookie_ack); + return; + } + chk->copy_by_ref = 0; + chk->rec.chunk_id.id = SCTP_COOKIE_ACK; + chk->rec.chunk_id.can_take_data = 1; + chk->flags = 0; + chk->send_size = sizeof(struct sctp_chunkhdr); + chk->sent = SCTP_DATAGRAM_UNSENT; + chk->snd_count = 0; + chk->asoc = &stcb->asoc; + chk->data = cookie_ack; + if (chk->asoc->last_control_chunk_from != NULL) { + chk->whoTo = chk->asoc->last_control_chunk_from; + atomic_add_int(&chk->whoTo->ref_count, 1); + } else { + chk->whoTo = NULL; + } + hdr = mtod(cookie_ack, struct sctp_chunkhdr *); + hdr->chunk_type = SCTP_COOKIE_ACK; + hdr->chunk_flags = 0; + hdr->chunk_length = htons(chk->send_size); + SCTP_BUF_LEN(cookie_ack) = chk->send_size; + TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); + chk->asoc->ctrl_queue_cnt++; + return; +} + + +void +sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net) +{ + /* formulate and queue a SHUTDOWN-ACK back to the sender */ + struct mbuf *m_shutdown_ack; + struct sctp_shutdown_ack_chunk *ack_cp; + struct sctp_tmit_chunk *chk; + + m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER); + if (m_shutdown_ack == NULL) { + /* no mbuf's */ + return; + } + SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD); + sctp_alloc_a_chunk(stcb, chk); + if (chk == NULL) { + /* no memory */ + sctp_m_freem(m_shutdown_ack); + return; + } + chk->copy_by_ref = 0; + chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK; + chk->rec.chunk_id.can_take_data = 1; + chk->flags = 0; + chk->send_size = sizeof(struct sctp_chunkhdr); + chk->sent = SCTP_DATAGRAM_UNSENT; + chk->snd_count = 0; + chk->flags = 0; + chk->asoc = &stcb->asoc; + chk->data = m_shutdown_ack; + chk->whoTo = net; + if (chk->whoTo) { + atomic_add_int(&chk->whoTo->ref_count, 1); + } + ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *); + ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK; + ack_cp->ch.chunk_flags = 0; + ack_cp->ch.chunk_length = htons(chk->send_size); + SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size; + TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); + chk->asoc->ctrl_queue_cnt++; + return; +} + +void +sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net) +{ + /* formulate and queue a SHUTDOWN to the sender */ + struct mbuf *m_shutdown; + struct sctp_shutdown_chunk *shutdown_cp; + struct sctp_tmit_chunk *chk; + + m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER); + if (m_shutdown == NULL) { + /* no mbuf's */ + return; + } + SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD); + sctp_alloc_a_chunk(stcb, chk); + if (chk == NULL) { + /* no memory */ + sctp_m_freem(m_shutdown); + return; + } + chk->copy_by_ref = 0; + chk->rec.chunk_id.id = SCTP_SHUTDOWN; + chk->rec.chunk_id.can_take_data = 1; + chk->flags = 0; + chk->send_size = sizeof(struct sctp_shutdown_chunk); + chk->sent = SCTP_DATAGRAM_UNSENT; + chk->snd_count = 0; + chk->flags = 0; + chk->asoc = &stcb->asoc; + chk->data = m_shutdown; + chk->whoTo = net; + if (chk->whoTo) { + atomic_add_int(&chk->whoTo->ref_count, 1); + } + shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *); + shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN; + shutdown_cp->ch.chunk_flags = 0; + shutdown_cp->ch.chunk_length = htons(chk->send_size); + shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn); + SCTP_BUF_LEN(m_shutdown) = chk->send_size; + TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); + chk->asoc->ctrl_queue_cnt++; + return; +} + +void +sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked) +{ + /* + * formulate and queue an ASCONF to the peer. + * ASCONF parameters should be queued on the assoc queue. + */ + struct sctp_tmit_chunk *chk; + struct mbuf *m_asconf; + int len; + + SCTP_TCB_LOCK_ASSERT(stcb); + + if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) && + (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) { + /* can't send a new one if there is one in flight already */ + return; + } + + /* compose an ASCONF chunk, maximum length is PMTU */ + m_asconf = sctp_compose_asconf(stcb, &len, addr_locked); + if (m_asconf == NULL) { + return; + } + + sctp_alloc_a_chunk(stcb, chk); + if (chk == NULL) { + /* no memory */ + sctp_m_freem(m_asconf); + return; + } + + chk->copy_by_ref = 0; + chk->rec.chunk_id.id = SCTP_ASCONF; + chk->rec.chunk_id.can_take_data = 0; + chk->flags = CHUNK_FLAGS_FRAGMENT_OK; + chk->data = m_asconf; + chk->send_size = len; + chk->sent = SCTP_DATAGRAM_UNSENT; + chk->snd_count = 0; + chk->asoc = &stcb->asoc; + chk->whoTo = net; + if (chk->whoTo) { + atomic_add_int(&chk->whoTo->ref_count, 1); + } + TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next); + chk->asoc->ctrl_queue_cnt++; + return; +} + +void +sctp_send_asconf_ack(struct sctp_tcb *stcb) +{ + /* + * formulate and queue a asconf-ack back to sender. + * the asconf-ack must be stored in the tcb. + */ + struct sctp_tmit_chunk *chk; + struct sctp_asconf_ack *ack, *latest_ack; + struct mbuf *m_ack; + struct sctp_nets *net = NULL; + + SCTP_TCB_LOCK_ASSERT(stcb); + /* Get the latest ASCONF-ACK */ + latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead); + if (latest_ack == NULL) { + return; + } + if (latest_ack->last_sent_to != NULL && + latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) { + /* we're doing a retransmission */ + net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0); + if (net == NULL) { + /* no alternate */ + if (stcb->asoc.last_control_chunk_from == NULL) { + if (stcb->asoc.alternate) { + net = stcb->asoc.alternate; + } else { + net = stcb->asoc.primary_destination; + } + } else { + net = stcb->asoc.last_control_chunk_from; + } + } + } else { + /* normal case */ + if (stcb->asoc.last_control_chunk_from == NULL) { + if (stcb->asoc.alternate) { + net = stcb->asoc.alternate; + } else { + net = stcb->asoc.primary_destination; + } + } else { + net = stcb->asoc.last_control_chunk_from; + } + } + latest_ack->last_sent_to = net; + + TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) { + if (ack->data == NULL) { + continue; + } + + /* copy the asconf_ack */ + m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT); + if (m_ack == NULL) { + /* couldn't copy it */ + return; + } +#ifdef SCTP_MBUF_LOGGING + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { + sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY); + } +#endif + + sctp_alloc_a_chunk(stcb, chk); + if (chk == NULL) { + /* no memory */ + if (m_ack) + sctp_m_freem(m_ack); + return; + } + chk->copy_by_ref = 0; + chk->rec.chunk_id.id = SCTP_ASCONF_ACK; + chk->rec.chunk_id.can_take_data = 1; + chk->flags = CHUNK_FLAGS_FRAGMENT_OK; + chk->whoTo = net; + if (chk->whoTo) { + atomic_add_int(&chk->whoTo->ref_count, 1); + } + chk->data = m_ack; + chk->send_size = ack->len; + chk->sent = SCTP_DATAGRAM_UNSENT; + chk->snd_count = 0; + chk->asoc = &stcb->asoc; + + TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); + chk->asoc->ctrl_queue_cnt++; + } + return; +} + + +static int +sctp_chunk_retransmission(struct sctp_inpcb *inp, + struct sctp_tcb *stcb, + struct sctp_association *asoc, + int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked +#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) + SCTP_UNUSED +#endif + ) +{ + /*- + * send out one MTU of retransmission. If fast_retransmit is + * happening we ignore the cwnd. Otherwise we obey the cwnd and + * rwnd. For a Cookie or Asconf in the control chunk queue we + * retransmit them by themselves. + * + * For data chunks we will pick out the lowest TSN's in the sent_queue + * marked for resend and bundle them all together (up to a MTU of + * destination). The address to send to should have been + * selected/changed where the retransmission was marked (i.e. in FR + * or t3-timeout routines). + */ + struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING]; + struct sctp_tmit_chunk *chk, *fwd; + struct mbuf *m, *endofchain; + struct sctp_nets *net = NULL; + uint32_t tsns_sent = 0; + int no_fragmentflg, bundle_at, cnt_thru; + unsigned int mtu; + int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started; + struct sctp_auth_chunk *auth = NULL; + uint32_t auth_offset = 0; + uint16_t auth_keyid; + int override_ok = 1; + int data_auth_reqd = 0; + uint32_t dmtu = 0; + +#if defined(__APPLE__) + if (so_locked) { + sctp_lock_assert(SCTP_INP_SO(inp)); + } else { + sctp_unlock_assert(SCTP_INP_SO(inp)); + } +#endif + SCTP_TCB_LOCK_ASSERT(stcb); + tmr_started = ctl_cnt = bundle_at = error = 0; + no_fragmentflg = 1; + fwd_tsn = 0; + *cnt_out = 0; + fwd = NULL; + endofchain = m = NULL; + auth_keyid = stcb->asoc.authinfo.active_keyid; +#ifdef SCTP_AUDITING_ENABLED + sctp_audit_log(0xC3, 1); +#endif + if ((TAILQ_EMPTY(&asoc->sent_queue)) && + (TAILQ_EMPTY(&asoc->control_send_queue))) { + SCTPDBG(SCTP_DEBUG_OUTPUT1,"SCTP hits empty queue with cnt set to %d?\n", + asoc->sent_queue_retran_cnt); + asoc->sent_queue_cnt = 0; + asoc->sent_queue_cnt_removeable = 0; + /* send back 0/0 so we enter normal transmission */ + *cnt_out = 0; + return (0); + } + TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { + if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) || + (chk->rec.chunk_id.id == SCTP_STREAM_RESET) || + (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) { + if (chk->sent != SCTP_DATAGRAM_RESEND) { + continue; + } + if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) { + if (chk != asoc->str_reset) { + /* + * not eligible for retran if its + * not ours + */ + continue; + } + } + ctl_cnt++; + if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) { + fwd_tsn = 1; + } + /* + * Add an AUTH chunk, if chunk requires it save the + * offset into the chain for AUTH + */ + if ((auth == NULL) && + (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, + stcb->asoc.peer_auth_chunks))) { + m = sctp_add_auth_chunk(m, &endofchain, + &auth, &auth_offset, + stcb, + chk->rec.chunk_id.id); + SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); + } + m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref); + break; + } + } + one_chunk = 0; + cnt_thru = 0; + /* do we have control chunks to retransmit? */ + if (m != NULL) { + /* Start a timer no matter if we suceed or fail */ + if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { + sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo); + } else if (chk->rec.chunk_id.id == SCTP_ASCONF) + sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo); + chk->snd_count++; /* update our count */ + if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo, + (struct sockaddr *)&chk->whoTo->ro._l_addr, m, + auth_offset, auth, stcb->asoc.authinfo.active_keyid, + no_fragmentflg, 0, 0, + inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag), + chk->whoTo->port, NULL, +#if defined(__FreeBSD__) + 0, 0, +#endif + so_locked))) { + SCTP_STAT_INCR(sctps_lowlevelerr); + return (error); + } + endofchain = NULL; + auth = NULL; + auth_offset = 0; + /* + * We don't want to mark the net->sent time here since this + * we use this for HB and retrans cannot measure RTT + */ + /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */ + *cnt_out += 1; + chk->sent = SCTP_DATAGRAM_SENT; + sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt); + if (fwd_tsn == 0) { + return (0); + } else { + /* Clean up the fwd-tsn list */ + sctp_clean_up_ctl(stcb, asoc, so_locked); + return (0); + } + } + /* + * Ok, it is just data retransmission we need to do or that and a + * fwd-tsn with it all. + */ + if (TAILQ_EMPTY(&asoc->sent_queue)) { + return (SCTP_RETRAN_DONE); + } + if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) || + (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) { + /* not yet open, resend the cookie and that is it */ + return (1); + } +#ifdef SCTP_AUDITING_ENABLED + sctp_auditing(20, inp, stcb, NULL); +#endif + data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks); + TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { + if (chk->sent != SCTP_DATAGRAM_RESEND) { + /* No, not sent to this net or not ready for rtx */ + continue; + } + if (chk->data == NULL) { + SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n", + chk->rec.data.TSN_seq, chk->snd_count, chk->sent); + continue; + } + if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) && + (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) { + /* Gak, we have exceeded max unlucky retran, abort! */ + SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n", + chk->snd_count, + SCTP_BASE_SYSCTL(sctp_max_retran_chunk)); + atomic_add_int(&stcb->asoc.refcnt, 1); + sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, so_locked); + SCTP_TCB_LOCK(stcb); + atomic_subtract_int(&stcb->asoc.refcnt, 1); + return (SCTP_RETRAN_EXIT); + } + /* pick up the net */ + net = chk->whoTo; + switch (net->ro._l_addr.sa.sa_family) { +#ifdef INET + case AF_INET: + mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; + break; +#endif +#ifdef INET6 + case AF_INET6: + mtu = net->mtu - SCTP_MIN_OVERHEAD; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + mtu = net->mtu - sizeof(struct sctphdr); + break; +#endif + default: + /* TSNH */ + mtu = net->mtu; + break; + } + + if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) { + /* No room in peers rwnd */ + uint32_t tsn; + + tsn = asoc->last_acked_seq + 1; + if (tsn == chk->rec.data.TSN_seq) { + /* + * we make a special exception for this + * case. The peer has no rwnd but is missing + * the lowest chunk.. which is probably what + * is holding up the rwnd. + */ + goto one_chunk_around; + } + return (1); + } + one_chunk_around: + if (asoc->peers_rwnd < mtu) { + one_chunk = 1; + if ((asoc->peers_rwnd == 0) && + (asoc->total_flight == 0)) { + chk->window_probe = 1; + chk->whoTo->window_probe = 1; + } + } +#ifdef SCTP_AUDITING_ENABLED + sctp_audit_log(0xC3, 2); +#endif + bundle_at = 0; + m = NULL; + net->fast_retran_ip = 0; + if (chk->rec.data.doing_fast_retransmit == 0) { + /* + * if no FR in progress skip destination that have + * flight_size > cwnd. + */ + if (net->flight_size >= net->cwnd) { + continue; + } + } else { + /* + * Mark the destination net to have FR recovery + * limits put on it. + */ + *fr_done = 1; + net->fast_retran_ip = 1; + } + + /* + * if no AUTH is yet included and this chunk requires it, + * make sure to account for it. We don't apply the size + * until the AUTH chunk is actually added below in case + * there is no room for this chunk. + */ + if (data_auth_reqd && (auth == NULL)) { + dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); + } else + dmtu = 0; + + if ((chk->send_size <= (mtu - dmtu)) || + (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { + /* ok we will add this one */ + if (data_auth_reqd) { + if (auth == NULL) { + m = sctp_add_auth_chunk(m, + &endofchain, + &auth, + &auth_offset, + stcb, + SCTP_DATA); + auth_keyid = chk->auth_keyid; + override_ok = 0; + SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); + } else if (override_ok) { + auth_keyid = chk->auth_keyid; + override_ok = 0; + } else if (chk->auth_keyid != auth_keyid) { + /* different keyid, so done bundling */ + break; + } + } + m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref); + if (m == NULL) { + SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + return (ENOMEM); + } + /* Do clear IP_DF ? */ + if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { + no_fragmentflg = 0; + } + /* upate our MTU size */ + if (mtu > (chk->send_size + dmtu)) + mtu -= (chk->send_size + dmtu); + else + mtu = 0; + data_list[bundle_at++] = chk; + if (one_chunk && (asoc->total_flight <= 0)) { + SCTP_STAT_INCR(sctps_windowprobed); + } + } + if (one_chunk == 0) { + /* + * now are there anymore forward from chk to pick + * up? + */ + for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) { + if (fwd->sent != SCTP_DATAGRAM_RESEND) { + /* Nope, not for retran */ + continue; + } + if (fwd->whoTo != net) { + /* Nope, not the net in question */ + continue; + } + if (data_auth_reqd && (auth == NULL)) { + dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); + } else + dmtu = 0; + if (fwd->send_size <= (mtu - dmtu)) { + if (data_auth_reqd) { + if (auth == NULL) { + m = sctp_add_auth_chunk(m, + &endofchain, + &auth, + &auth_offset, + stcb, + SCTP_DATA); + auth_keyid = fwd->auth_keyid; + override_ok = 0; + SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); + } else if (override_ok) { + auth_keyid = fwd->auth_keyid; + override_ok = 0; + } else if (fwd->auth_keyid != auth_keyid) { + /* different keyid, so done bundling */ + break; + } + } + m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref); + if (m == NULL) { + SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + return (ENOMEM); + } + /* Do clear IP_DF ? */ + if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) { + no_fragmentflg = 0; + } + /* upate our MTU size */ + if (mtu > (fwd->send_size + dmtu)) + mtu -= (fwd->send_size + dmtu); + else + mtu = 0; + data_list[bundle_at++] = fwd; + if (bundle_at >= SCTP_MAX_DATA_BUNDLING) { + break; + } + } else { + /* can't fit so we are done */ + break; + } + } + } + /* Is there something to send for this destination? */ + if (m) { + /* + * No matter if we fail/or suceed we should start a + * timer. A failure is like a lost IP packet :-) + */ + if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { + /* + * no timer running on this destination + * restart it. + */ + sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); + tmr_started = 1; + } + /* Now lets send it, if there is anything to send :> */ + if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, + (struct sockaddr *)&net->ro._l_addr, m, + auth_offset, auth, auth_keyid, + no_fragmentflg, 0, 0, + inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag), + net->port, NULL, +#if defined(__FreeBSD__) + 0, 0, +#endif + so_locked))) { + /* error, we could not output */ + SCTP_STAT_INCR(sctps_lowlevelerr); + return (error); + } + endofchain = NULL; + auth = NULL; + auth_offset = 0; + /* For HB's */ + /* + * We don't want to mark the net->sent time here + * since this we use this for HB and retrans cannot + * measure RTT + */ + /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */ + + /* For auto-close */ + cnt_thru++; + if (*now_filled == 0) { + (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent); + *now = asoc->time_last_sent; + *now_filled = 1; + } else { + asoc->time_last_sent = *now; + } + *cnt_out += bundle_at; +#ifdef SCTP_AUDITING_ENABLED + sctp_audit_log(0xC4, bundle_at); +#endif + if (bundle_at) { + tsns_sent = data_list[0]->rec.data.TSN_seq; + } + for (i = 0; i < bundle_at; i++) { + SCTP_STAT_INCR(sctps_sendretransdata); + data_list[i]->sent = SCTP_DATAGRAM_SENT; + /* + * When we have a revoked data, and we + * retransmit it, then we clear the revoked + * flag since this flag dictates if we + * subtracted from the fs + */ + if (data_list[i]->rec.data.chunk_was_revoked) { + /* Deflate the cwnd */ + data_list[i]->whoTo->cwnd -= data_list[i]->book_size; + data_list[i]->rec.data.chunk_was_revoked = 0; + } + data_list[i]->snd_count++; + sctp_ucount_decr(asoc->sent_queue_retran_cnt); + /* record the time */ + data_list[i]->sent_rcv_time = asoc->time_last_sent; + if (data_list[i]->book_size_scale) { + /* + * need to double the book size on + * this one + */ + data_list[i]->book_size_scale = 0; + /* Since we double the booksize, we must + * also double the output queue size, since this + * get shrunk when we free by this amount. + */ + atomic_add_int(&((asoc)->total_output_queue_size),data_list[i]->book_size); + data_list[i]->book_size *= 2; + + + } else { + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) { + sctp_log_rwnd(SCTP_DECREASE_PEER_RWND, + asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)); + } + asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd, + (uint32_t) (data_list[i]->send_size + + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh))); + } + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { + sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND, + data_list[i]->whoTo->flight_size, + data_list[i]->book_size, + (uintptr_t)data_list[i]->whoTo, + data_list[i]->rec.data.TSN_seq); + } + sctp_flight_size_increase(data_list[i]); + sctp_total_flight_increase(stcb, data_list[i]); + if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) { + /* SWS sender side engages */ + asoc->peers_rwnd = 0; + } + if ((i == 0) && + (data_list[i]->rec.data.doing_fast_retransmit)) { + SCTP_STAT_INCR(sctps_sendfastretrans); + if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) && + (tmr_started == 0)) { + /*- + * ok we just fast-retrans'd + * the lowest TSN, i.e the + * first on the list. In + * this case we want to give + * some more time to get a + * SACK back without a + * t3-expiring. + */ + sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net, + SCTP_FROM_SCTP_OUTPUT+SCTP_LOC_4); + sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); + } + } + } + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { + sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND); + } +#ifdef SCTP_AUDITING_ENABLED + sctp_auditing(21, inp, stcb, NULL); +#endif + } else { + /* None will fit */ + return (1); + } + if (asoc->sent_queue_retran_cnt <= 0) { + /* all done we have no more to retran */ + asoc->sent_queue_retran_cnt = 0; + break; + } + if (one_chunk) { + /* No more room in rwnd */ + return (1); + } + /* stop the for loop here. we sent out a packet */ + break; + } + return (0); +} + +static void +sctp_timer_validation(struct sctp_inpcb *inp, + struct sctp_tcb *stcb, + struct sctp_association *asoc) +{ + struct sctp_nets *net; + + /* Validate that a timer is running somewhere */ + TAILQ_FOREACH(net, &asoc->nets, sctp_next) { + if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { + /* Here is a timer */ + return; + } + } + SCTP_TCB_LOCK_ASSERT(stcb); + /* Gak, we did not have a timer somewhere */ + SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n"); + if (asoc->alternate) { + sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate); + } else { + sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination); + } + return; +} + +void +sctp_chunk_output (struct sctp_inpcb *inp, + struct sctp_tcb *stcb, + int from_where, + int so_locked +#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) + SCTP_UNUSED +#endif + ) +{ + /*- + * Ok this is the generic chunk service queue. we must do the + * following: + * - See if there are retransmits pending, if so we must + * do these first. + * - Service the stream queue that is next, moving any + * message (note I must get a complete message i.e. + * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning + * TSN's + * - Check to see if the cwnd/rwnd allows any output, if so we + * go ahead and fomulate and send the low level chunks. Making sure + * to combine any control in the control chunk queue also. + */ + struct sctp_association *asoc; + struct sctp_nets *net; + int error = 0, num_out, tot_out = 0, ret = 0, reason_code; + unsigned int burst_cnt = 0; + struct timeval now; + int now_filled = 0; + int nagle_on; + int frag_point = sctp_get_frag_point(stcb, &stcb->asoc); + int un_sent = 0; + int fr_done; + unsigned int tot_frs = 0; + +#if defined(__APPLE__) + if (so_locked) { + sctp_lock_assert(SCTP_INP_SO(inp)); + } else { + sctp_unlock_assert(SCTP_INP_SO(inp)); + } +#endif + asoc = &stcb->asoc; + /* The Nagle algorithm is only applied when handling a send call. */ + if (from_where == SCTP_OUTPUT_FROM_USR_SEND) { + if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) { + nagle_on = 0; + } else { + nagle_on = 1; + } + } else { + nagle_on = 0; + } + SCTP_TCB_LOCK_ASSERT(stcb); + + un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight); + + if ((un_sent <= 0) && + (TAILQ_EMPTY(&asoc->control_send_queue)) && + (TAILQ_EMPTY(&asoc->asconf_send_queue)) && + (asoc->sent_queue_retran_cnt == 0)) { + /* Nothing to do unless there is something to be sent left */ + return; + } + /* Do we have something to send, data or control AND + * a sack timer running, if so piggy-back the sack. + */ + if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) { + sctp_send_sack(stcb, so_locked); + (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); + } + while (asoc->sent_queue_retran_cnt) { + /*- + * Ok, it is retransmission time only, we send out only ONE + * packet with a single call off to the retran code. + */ + if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) { + /*- + * Special hook for handling cookiess discarded + * by peer that carried data. Send cookie-ack only + * and then the next call with get the retran's. + */ + (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, + from_where, + &now, &now_filled, frag_point, so_locked); + return; + } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) { + /* if its not from a HB then do it */ + fr_done = 0; + ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked); + if (fr_done) { + tot_frs++; + } + } else { + /* + * its from any other place, we don't allow retran + * output (only control) + */ + ret = 1; + } + if (ret > 0) { + /* Can't send anymore */ + /*- + * now lets push out control by calling med-level + * output once. this assures that we WILL send HB's + * if queued too. + */ + (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, + from_where, + &now, &now_filled, frag_point, so_locked); +#ifdef SCTP_AUDITING_ENABLED + sctp_auditing(8, inp, stcb, NULL); +#endif + sctp_timer_validation(inp, stcb, asoc); + return; + } + if (ret < 0) { + /*- + * The count was off.. retran is not happening so do + * the normal retransmission. + */ +#ifdef SCTP_AUDITING_ENABLED + sctp_auditing(9, inp, stcb, NULL); +#endif + if (ret == SCTP_RETRAN_EXIT) { + return; + } + break; + } + if (from_where == SCTP_OUTPUT_FROM_T3) { + /* Only one transmission allowed out of a timeout */ +#ifdef SCTP_AUDITING_ENABLED + sctp_auditing(10, inp, stcb, NULL); +#endif + /* Push out any control */ + (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where, + &now, &now_filled, frag_point, so_locked); + return; + } + if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) { + /* Hit FR burst limit */ + return; + } + if ((num_out == 0) && (ret == 0)) { + /* No more retrans to send */ + break; + } + } +#ifdef SCTP_AUDITING_ENABLED + sctp_auditing(12, inp, stcb, NULL); +#endif + /* Check for bad destinations, if they exist move chunks around. */ + TAILQ_FOREACH(net, &asoc->nets, sctp_next) { + if (!(net->dest_state & SCTP_ADDR_REACHABLE)) { + /*- + * if possible move things off of this address we + * still may send below due to the dormant state but + * we try to find an alternate address to send to + * and if we have one we move all queued data on the + * out wheel to this alternate address. + */ + if (net->ref_count > 1) + sctp_move_chunks_from_net(stcb, net); + } else { + /*- + * if ((asoc->sat_network) || (net->addr_is_local)) + * { burst_limit = asoc->max_burst * + * SCTP_SAT_NETWORK_BURST_INCR; } + */ + if (asoc->max_burst > 0) { + if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) { + if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) { + /* JRS - Use the congestion control given in the congestion control module */ + asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst); + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { + sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED); + } + SCTP_STAT_INCR(sctps_maxburstqueued); + } + net->fast_retran_ip = 0; + } else { + if (net->flight_size == 0) { + /* Should be decaying the cwnd here */ + ; + } + } + } + } + + } + burst_cnt = 0; + do { + error = sctp_med_chunk_output(inp, stcb, asoc, &num_out, + &reason_code, 0, from_where, + &now, &now_filled, frag_point, so_locked); + if (error) { + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error); + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { + sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP); + } + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { + sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES); + sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES); + } + break; + } + SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out); + + tot_out += num_out; + burst_cnt++; + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { + sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES); + if (num_out == 0) { + sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES); + } + } + if (nagle_on) { + /* + * When the Nagle algorithm is used, look at how much + * is unsent, then if its smaller than an MTU and we + * have data in flight we stop, except if we are + * handling a fragmented user message. + */ + un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + + (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); + if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) && + (stcb->asoc.total_flight > 0) && + ((stcb->asoc.locked_on_sending == NULL) || + sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) { + break; + } + } + if (TAILQ_EMPTY(&asoc->control_send_queue) && + TAILQ_EMPTY(&asoc->send_queue) && + stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) { + /* Nothing left to send */ + break; + } + if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) { + /* Nothing left to send */ + break; + } + } while (num_out && + ((asoc->max_burst == 0) || + SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) || + (burst_cnt < asoc->max_burst))); + + if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) { + if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) { + SCTP_STAT_INCR(sctps_maxburstqueued); + asoc->burst_limit_applied = 1; + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { + sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED); + } + } else { + asoc->burst_limit_applied = 0; + } + } + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { + sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES); + } + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n", + tot_out); + + /*- + * Now we need to clean up the control chunk chain if a ECNE is on + * it. It must be marked as UNSENT again so next call will continue + * to send it until such time that we get a CWR, to remove it. + */ + if (stcb->asoc.ecn_echo_cnt_onq) + sctp_fix_ecn_echo(asoc); + return; +} + + +int +sctp_output( + struct sctp_inpcb *inp, +#if defined(__Panda__) + pakhandle_type m, +#else + struct mbuf *m, +#endif + struct sockaddr *addr, +#if defined(__Panda__) + pakhandle_type control, +#else + struct mbuf *control, +#endif +#if defined(__FreeBSD__) && __FreeBSD_version >= 500000 + struct thread *p, +#elif defined(__Windows__) + PKTHREAD p, +#else +#if defined(__APPLE__) + struct proc *p SCTP_UNUSED, +#else + struct proc *p, +#endif +#endif + int flags) +{ + if (inp == NULL) { + SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); + return (EINVAL); + } + + if (inp->sctp_socket == NULL) { + SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); + return (EINVAL); + } + return (sctp_sosend(inp->sctp_socket, + addr, + (struct uio *)NULL, + m, + control, +#if defined(__APPLE__) || defined(__Panda__) + flags +#else + flags, p +#endif + )); +} + +void +send_forward_tsn(struct sctp_tcb *stcb, + struct sctp_association *asoc) +{ + struct sctp_tmit_chunk *chk; + struct sctp_forward_tsn_chunk *fwdtsn; + uint32_t advance_peer_ack_point; + + SCTP_TCB_LOCK_ASSERT(stcb); + TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { + if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) { + /* mark it to unsent */ + chk->sent = SCTP_DATAGRAM_UNSENT; + chk->snd_count = 0; + /* Do we correct its output location? */ + if (chk->whoTo) { + sctp_free_remote_addr(chk->whoTo); + chk->whoTo = NULL; + } + goto sctp_fill_in_rest; + } + } + /* Ok if we reach here we must build one */ + sctp_alloc_a_chunk(stcb, chk); + if (chk == NULL) { + return; + } + asoc->fwd_tsn_cnt++; + chk->copy_by_ref = 0; + chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN; + chk->rec.chunk_id.can_take_data = 0; + chk->flags = 0; + chk->asoc = asoc; + chk->whoTo = NULL; + chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); + if (chk->data == NULL) { + sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); + return; + } + SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); + chk->sent = SCTP_DATAGRAM_UNSENT; + chk->snd_count = 0; + TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next); + asoc->ctrl_queue_cnt++; +sctp_fill_in_rest: + /*- + * Here we go through and fill out the part that deals with + * stream/seq of the ones we skip. + */ + SCTP_BUF_LEN(chk->data) = 0; + { + struct sctp_tmit_chunk *at, *tp1, *last; + struct sctp_strseq *strseq; + unsigned int cnt_of_space, i, ovh; + unsigned int space_needed; + unsigned int cnt_of_skipped = 0; + + TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) { + if ((at->sent != SCTP_FORWARD_TSN_SKIP) && + (at->sent != SCTP_DATAGRAM_NR_ACKED)) { + /* no more to look at */ + break; + } + if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) { + /* We don't report these */ + continue; + } + cnt_of_skipped++; + } + space_needed = (sizeof(struct sctp_forward_tsn_chunk) + + (cnt_of_skipped * sizeof(struct sctp_strseq))); + + cnt_of_space = M_TRAILINGSPACE(chk->data); + + if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { + ovh = SCTP_MIN_OVERHEAD; + } else { + ovh = SCTP_MIN_V4_OVERHEAD; + } + if (cnt_of_space > (asoc->smallest_mtu - ovh)) { + /* trim to a mtu size */ + cnt_of_space = asoc->smallest_mtu - ovh; + } + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { + sctp_misc_ints(SCTP_FWD_TSN_CHECK, + 0xff, 0, cnt_of_skipped, + asoc->advanced_peer_ack_point); + + } + advance_peer_ack_point = asoc->advanced_peer_ack_point; + if (cnt_of_space < space_needed) { + /*- + * ok we must trim down the chunk by lowering the + * advance peer ack point. + */ + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { + sctp_misc_ints(SCTP_FWD_TSN_CHECK, + 0xff, 0xff, cnt_of_space, + space_needed); + } + cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk); + cnt_of_skipped /= sizeof(struct sctp_strseq); + /*- + * Go through and find the TSN that will be the one + * we report. + */ + at = TAILQ_FIRST(&asoc->sent_queue); + if (at != NULL) { + for (i = 0; i < cnt_of_skipped; i++) { + tp1 = TAILQ_NEXT(at, sctp_next); + if (tp1 == NULL) { + break; + } + at = tp1; + } + } + if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { + sctp_misc_ints(SCTP_FWD_TSN_CHECK, + 0xff, cnt_of_skipped, at->rec.data.TSN_seq, + asoc->advanced_peer_ack_point); + } + last = at; + /*- + * last now points to last one I can report, update + * peer ack point + */ + if (last) + advance_peer_ack_point = last->rec.data.TSN_seq; + space_needed = sizeof(struct sctp_forward_tsn_chunk) + + cnt_of_skipped * sizeof(struct sctp_strseq); + } + chk->send_size = space_needed; + /* Setup the chunk */ + fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *); + fwdtsn->ch.chunk_length = htons(chk->send_size); + fwdtsn->ch.chunk_flags = 0; + fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN; + fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point); + SCTP_BUF_LEN(chk->data) = chk->send_size; + fwdtsn++; + /*- + * Move pointer to after the fwdtsn and transfer to the + * strseq pointer. + */ + strseq = (struct sctp_strseq *)fwdtsn; + /*- + * Now populate the strseq list. This is done blindly + * without pulling out duplicate stream info. This is + * inefficent but won't harm the process since the peer will + * look at these in sequence and will thus release anything. + * It could mean we exceed the PMTU and chop off some that + * we could have included.. but this is unlikely (aka 1432/4 + * would mean 300+ stream seq's would have to be reported in + * one FWD-TSN. With a bit of work we can later FIX this to + * optimize and pull out duplcates.. but it does add more + * overhead. So for now... not! + */ + at = TAILQ_FIRST(&asoc->sent_queue); + for (i = 0; i < cnt_of_skipped; i++) { + tp1 = TAILQ_NEXT(at, sctp_next); + if (tp1 == NULL) + break; + if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) { + /* We don't report these */ + i--; + at = tp1; + continue; + } + if (at->rec.data.TSN_seq == advance_peer_ack_point) { + at->rec.data.fwd_tsn_cnt = 0; + } + strseq->stream = ntohs(at->rec.data.stream_number); + strseq->sequence = ntohs(at->rec.data.stream_seq); + strseq++; + at = tp1; + } + } + return; +} + +void +sctp_send_sack(struct sctp_tcb *stcb, int so_locked +#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) + SCTP_UNUSED +#endif +) +{ + /*- + * Queue up a SACK or NR-SACK in the control queue. + * We must first check to see if a SACK or NR-SACK is + * somehow on the control queue. + * If so, we will take and and remove the old one. + */ + struct sctp_association *asoc; + struct sctp_tmit_chunk *chk, *a_chk; + struct sctp_sack_chunk *sack; + struct sctp_nr_sack_chunk *nr_sack; + struct sctp_gap_ack_block *gap_descriptor; + struct sack_track *selector; + int mergeable = 0; + int offset; + caddr_t limit; + uint32_t *dup; + int limit_reached = 0; + unsigned int i, siz, j; + unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space; + int num_dups = 0; + int space_req; + uint32_t highest_tsn; + uint8_t flags; + uint8_t type; + uint8_t tsn_map; + + if (stcb->asoc.nrsack_supported == 1) { + type = SCTP_NR_SELECTIVE_ACK; + } else { + type = SCTP_SELECTIVE_ACK; + } + a_chk = NULL; + asoc = &stcb->asoc; + SCTP_TCB_LOCK_ASSERT(stcb); + if (asoc->last_data_chunk_from == NULL) { + /* Hmm we never received anything */ + return; + } + sctp_slide_mapping_arrays(stcb); + sctp_set_rwnd(stcb, asoc); + TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { + if (chk->rec.chunk_id.id == type) { + /* Hmm, found a sack already on queue, remove it */ + TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); + asoc->ctrl_queue_cnt--; + a_chk = chk; + if (a_chk->data) { + sctp_m_freem(a_chk->data); + a_chk->data = NULL; + } + if (a_chk->whoTo) { + sctp_free_remote_addr(a_chk->whoTo); + a_chk->whoTo = NULL; + } + break; + } + } + if (a_chk == NULL) { + sctp_alloc_a_chunk(stcb, a_chk); + if (a_chk == NULL) { + /* No memory so we drop the idea, and set a timer */ + if (stcb->asoc.delayed_ack) { + sctp_timer_stop(SCTP_TIMER_TYPE_RECV, + stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5); + sctp_timer_start(SCTP_TIMER_TYPE_RECV, + stcb->sctp_ep, stcb, NULL); + } else { + stcb->asoc.send_sack = 1; + } + return; + } + a_chk->copy_by_ref = 0; + a_chk->rec.chunk_id.id = type; + a_chk->rec.chunk_id.can_take_data = 1; + } + /* Clear our pkt counts */ + asoc->data_pkts_seen = 0; + + a_chk->flags = 0; + a_chk->asoc = asoc; + a_chk->snd_count = 0; + a_chk->send_size = 0; /* fill in later */ + a_chk->sent = SCTP_DATAGRAM_UNSENT; + a_chk->whoTo = NULL; + + if ((asoc->numduptsns) || + (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE))) { + /*- + * Ok, we have some duplicates or the destination for the + * sack is unreachable, lets see if we can select an + * alternate than asoc->last_data_chunk_from + */ + if ((asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE) && + (asoc->used_alt_onsack > asoc->numnets)) { + /* We used an alt last time, don't this time */ + a_chk->whoTo = NULL; + } else { + asoc->used_alt_onsack++; + a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0); + } + if (a_chk->whoTo == NULL) { + /* Nope, no alternate */ + a_chk->whoTo = asoc->last_data_chunk_from; + asoc->used_alt_onsack = 0; + } + } else { + /* + * No duplicates so we use the last place we received data + * from. + */ + asoc->used_alt_onsack = 0; + a_chk->whoTo = asoc->last_data_chunk_from; + } + if (a_chk->whoTo) { + atomic_add_int(&a_chk->whoTo->ref_count, 1); + } + if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) { + highest_tsn = asoc->highest_tsn_inside_map; + } else { + highest_tsn = asoc->highest_tsn_inside_nr_map; + } + if (highest_tsn == asoc->cumulative_tsn) { + /* no gaps */ + if (type == SCTP_SELECTIVE_ACK) { + space_req = sizeof(struct sctp_sack_chunk); + } else { + space_req = sizeof(struct sctp_nr_sack_chunk); + } + } else { + /* gaps get a cluster */ + space_req = MCLBYTES; + } + /* Ok now lets formulate a MBUF with our sack */ + a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA); + if ((a_chk->data == NULL) || + (a_chk->whoTo == NULL)) { + /* rats, no mbuf memory */ + if (a_chk->data) { + /* was a problem with the destination */ + sctp_m_freem(a_chk->data); + a_chk->data = NULL; + } + sctp_free_a_chunk(stcb, a_chk, so_locked); + /* sa_ignore NO_NULL_CHK */ + if (stcb->asoc.delayed_ack) { + sctp_timer_stop(SCTP_TIMER_TYPE_RECV, + stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6); + sctp_timer_start(SCTP_TIMER_TYPE_RECV, + stcb->sctp_ep, stcb, NULL); + } else { + stcb->asoc.send_sack = 1; + } + return; + } + /* ok, lets go through and fill it in */ + SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD); + space = M_TRAILINGSPACE(a_chk->data); + if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) { + space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD); + } + limit = mtod(a_chk->data, caddr_t); + limit += space; + + flags = 0; + + if ((asoc->sctp_cmt_on_off > 0) && + SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) { + /*- + * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been + * received, then set high bit to 1, else 0. Reset + * pkts_rcvd. + */ + flags |= (asoc->cmt_dac_pkts_rcvd << 6); + asoc->cmt_dac_pkts_rcvd = 0; + } +#ifdef SCTP_ASOCLOG_OF_TSNS + stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn; + stcb->asoc.cumack_log_atsnt++; + if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) { + stcb->asoc.cumack_log_atsnt = 0; + } +#endif + /* reset the readers interpretation */ + stcb->freed_by_sorcv_sincelast = 0; + + if (type == SCTP_SELECTIVE_ACK) { + sack = mtod(a_chk->data, struct sctp_sack_chunk *); + nr_sack = NULL; + gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk)); + if (highest_tsn > asoc->mapping_array_base_tsn) { + siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8; + } else { + siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8; + } + } else { + sack = NULL; + nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *); + gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk)); + if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) { + siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8; + } else { + siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8; + } + } + + if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) { + offset = 1; + } else { + offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn; + } + if (((type == SCTP_SELECTIVE_ACK) && + SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) || + ((type == SCTP_NR_SELECTIVE_ACK) && + SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) { + /* we have a gap .. maybe */ + for (i = 0; i < siz; i++) { + tsn_map = asoc->mapping_array[i]; + if (type == SCTP_SELECTIVE_ACK) { + tsn_map |= asoc->nr_mapping_array[i]; + } + if (i == 0) { + /* + * Clear all bits corresponding to TSNs + * smaller or equal to the cumulative TSN. + */ + tsn_map &= (~0 << (1 - offset)); + } + selector = &sack_array[tsn_map]; + if (mergeable && selector->right_edge) { + /* + * Backup, left and right edges were ok to + * merge. + */ + num_gap_blocks--; + gap_descriptor--; + } + if (selector->num_entries == 0) + mergeable = 0; + else { + for (j = 0; j < selector->num_entries; j++) { + if (mergeable && selector->right_edge) { + /* + * do a merge by NOT setting + * the left side + */ + mergeable = 0; + } else { + /* + * no merge, set the left + * side + */ + mergeable = 0; + gap_descriptor->start = htons((selector->gaps[j].start + offset)); + } + gap_descriptor->end = htons((selector->gaps[j].end + offset)); + num_gap_blocks++; + gap_descriptor++; + if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) { + /* no more room */ + limit_reached = 1; + break; + } + } + if (selector->left_edge) { + mergeable = 1; + } + } + if (limit_reached) { + /* Reached the limit stop */ + break; + } + offset += 8; + } + } + if ((type == SCTP_NR_SELECTIVE_ACK) && + (limit_reached == 0)) { + + mergeable = 0; + + if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) { + siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8; + } else { + siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8; + } + + if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) { + offset = 1; + } else { + offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn; + } + if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) { + /* we have a gap .. maybe */ + for (i = 0; i < siz; i++) { + tsn_map = asoc->nr_mapping_array[i]; + if (i == 0) { + /* + * Clear all bits corresponding to TSNs + * smaller or equal to the cumulative TSN. + */ + tsn_map &= (~0 << (1 - offset)); + } + selector = &sack_array[tsn_map]; + if (mergeable && selector->right_edge) { + /* + * Backup, left and right edges were ok to + * merge. + */ + num_nr_gap_blocks--; + gap_descriptor--; + } + if (selector->num_entries == 0) + mergeable = 0; + else { + for (j = 0; j < selector->num_entries; j++) { + if (mergeable && selector->right_edge) { + /* + * do a merge by NOT setting + * the left side + */ + mergeable = 0; + } else { + /* + * no merge, set the left + * side + */ + mergeable = 0; + gap_descriptor->start = htons((selector->gaps[j].start + offset)); + } + gap_descriptor->end = htons((selector->gaps[j].end + offset)); + num_nr_gap_blocks++; + gap_descriptor++; + if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) { + /* no more room */ + limit_reached = 1; + break; + } + } + if (selector->left_edge) { + mergeable = 1; + } + } + if (limit_reached) { + /* Reached the limit stop */ + break; + } + offset += 8; + } + } + } + /* now we must add any dups we are going to report. */ + if ((limit_reached == 0) && (asoc->numduptsns)) { + dup = (uint32_t *) gap_descriptor; + for (i = 0; i < asoc->numduptsns; i++) { + *dup = htonl(asoc->dup_tsns[i]); + dup++; + num_dups++; + if (((caddr_t)dup + sizeof(uint32_t)) > limit) { + /* no more room */ + break; + } + } + asoc->numduptsns = 0; + } + /* + * now that the chunk is prepared queue it to the control chunk + * queue. + */ + if (type == SCTP_SELECTIVE_ACK) { + a_chk->send_size = sizeof(struct sctp_sack_chunk) + + (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) + + num_dups * sizeof(int32_t); + SCTP_BUF_LEN(a_chk->data) = a_chk->send_size; + sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn); + sack->sack.a_rwnd = htonl(asoc->my_rwnd); + sack->sack.num_gap_ack_blks = htons(num_gap_blocks); + sack->sack.num_dup_tsns = htons(num_dups); + sack->ch.chunk_type = type; + sack->ch.chunk_flags = flags; + sack->ch.chunk_length = htons(a_chk->send_size); + } else { + a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) + + (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) + + num_dups * sizeof(int32_t); + SCTP_BUF_LEN(a_chk->data) = a_chk->send_size; + nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn); + nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd); + nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks); + nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks); + nr_sack->nr_sack.num_dup_tsns = htons(num_dups); + nr_sack->nr_sack.reserved = 0; + nr_sack->ch.chunk_type = type; + nr_sack->ch.chunk_flags = flags; + nr_sack->ch.chunk_length = htons(a_chk->send_size); + } + TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next); + asoc->my_last_reported_rwnd = asoc->my_rwnd; + asoc->ctrl_queue_cnt++; + asoc->send_sack = 0; + SCTP_STAT_INCR(sctps_sendsacks); + return; +} + +void +sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked +#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) + SCTP_UNUSED +#endif + ) +{ + struct mbuf *m_abort, *m, *m_last; + struct mbuf *m_out, *m_end = NULL; + struct sctp_abort_chunk *abort; + struct sctp_auth_chunk *auth = NULL; + struct sctp_nets *net; + uint32_t vtag; + uint32_t auth_offset = 0; + uint16_t cause_len, chunk_len, padding_len; + +#if defined(__APPLE__) + if (so_locked) { + sctp_lock_assert(SCTP_INP_SO(stcb->sctp_ep)); + } else { + sctp_unlock_assert(SCTP_INP_SO(stcb->sctp_ep)); + } +#endif + SCTP_TCB_LOCK_ASSERT(stcb); + /*- + * Add an AUTH chunk, if chunk requires it and save the offset into + * the chain for AUTH + */ + if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION, + stcb->asoc.peer_auth_chunks)) { + m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset, + stcb, SCTP_ABORT_ASSOCIATION); + SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); + } else { + m_out = NULL; + } + m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER); + if (m_abort == NULL) { + if (m_out) { + sctp_m_freem(m_out); + } + if (operr) { + sctp_m_freem(operr); + } + return; + } + /* link in any error */ + SCTP_BUF_NEXT(m_abort) = operr; + cause_len = 0; + m_last = NULL; + for (m = operr; m; m = SCTP_BUF_NEXT(m)) { + cause_len += (uint16_t)SCTP_BUF_LEN(m); + if (SCTP_BUF_NEXT(m) == NULL) { + m_last = m; + } + } + SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk); + chunk_len = (uint16_t)sizeof(struct sctp_abort_chunk) + cause_len; + padding_len = SCTP_SIZE32(chunk_len) - chunk_len; + if (m_out == NULL) { + /* NO Auth chunk prepended, so reserve space in front */ + SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD); + m_out = m_abort; + } else { + /* Put AUTH chunk at the front of the chain */ + SCTP_BUF_NEXT(m_end) = m_abort; + } + if (stcb->asoc.alternate) { + net = stcb->asoc.alternate; + } else { + net = stcb->asoc.primary_destination; + } + /* Fill in the ABORT chunk header. */ + abort = mtod(m_abort, struct sctp_abort_chunk *); + abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION; + if (stcb->asoc.peer_vtag == 0) { + /* This happens iff the assoc is in COOKIE-WAIT state. */ + vtag = stcb->asoc.my_vtag; + abort->ch.chunk_flags = SCTP_HAD_NO_TCB; + } else { + vtag = stcb->asoc.peer_vtag; + abort->ch.chunk_flags = 0; + } + abort->ch.chunk_length = htons(chunk_len); + /* Add padding, if necessary. */ + if (padding_len > 0) { + if ((m_last == NULL) || + (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) { + sctp_m_freem(m_out); + return; + } + } + (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net, + (struct sockaddr *)&net->ro._l_addr, + m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0, + stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag), + stcb->asoc.primary_destination->port, NULL, +#if defined(__FreeBSD__) + 0, 0, +#endif + so_locked); + SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); +} + +void +sctp_send_shutdown_complete(struct sctp_tcb *stcb, + struct sctp_nets *net, + int reflect_vtag) +{ + /* formulate and SEND a SHUTDOWN-COMPLETE */ + struct mbuf *m_shutdown_comp; + struct sctp_shutdown_complete_chunk *shutdown_complete; + uint32_t vtag; + uint8_t flags; + + m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER); + if (m_shutdown_comp == NULL) { + /* no mbuf's */ + return; + } + if (reflect_vtag) { + flags = SCTP_HAD_NO_TCB; + vtag = stcb->asoc.my_vtag; + } else { + flags = 0; + vtag = stcb->asoc.peer_vtag; + } + shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *); + shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE; + shutdown_complete->ch.chunk_flags = flags; + shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk)); + SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk); + (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net, + (struct sockaddr *)&net->ro._l_addr, + m_shutdown_comp, 0, NULL, 0, 1, 0, 0, + stcb->sctp_ep->sctp_lport, stcb->rport, + htonl(vtag), + net->port, NULL, +#if defined(__FreeBSD__) + 0, 0, +#endif + SCTP_SO_NOT_LOCKED); + SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); + return; +} + +#if defined(__FreeBSD__) +static void +sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst, + struct sctphdr *sh, uint32_t vtag, + uint8_t type, struct mbuf *cause, + uint8_t mflowtype, uint32_t mflowid, + uint32_t vrf_id, uint16_t port) +#else +static void +sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst, + struct sctphdr *sh, uint32_t vtag, + uint8_t type, struct mbuf *cause, + uint32_t vrf_id SCTP_UNUSED, uint16_t port) +#endif +{ +#ifdef __Panda__ + pakhandle_type o_pak; +#else + struct mbuf *o_pak; +#endif + struct mbuf *mout; + struct sctphdr *shout; + struct sctp_chunkhdr *ch; +#if defined(INET) || defined(INET6) + struct udphdr *udp; + int ret; +#endif + int len, cause_len, padding_len; +#ifdef INET +#if defined(__APPLE__) || defined(__Panda__) + sctp_route_t ro; +#endif + struct sockaddr_in *src_sin, *dst_sin; + struct ip *ip; +#endif +#ifdef INET6 + struct sockaddr_in6 *src_sin6, *dst_sin6; + struct ip6_hdr *ip6; +#endif + + /* Compute the length of the cause and add final padding. */ + cause_len = 0; + if (cause != NULL) { + struct mbuf *m_at, *m_last = NULL; + + for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) { + if (SCTP_BUF_NEXT(m_at) == NULL) + m_last = m_at; + cause_len += SCTP_BUF_LEN(m_at); + } + padding_len = cause_len % 4; + if (padding_len != 0) { + padding_len = 4 - padding_len; + } + if (padding_len != 0) { + if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) { + sctp_m_freem(cause); + return; + } + } + } else { + padding_len = 0; + } + /* Get an mbuf for the header. */ + len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); + switch (dst->sa_family) { +#ifdef INET + case AF_INET: + len += sizeof(struct ip); + break; +#endif +#ifdef INET6 + case AF_INET6: + len += sizeof(struct ip6_hdr); + break; +#endif + default: + break; + } +#if defined(INET) || defined(INET6) + if (port) { + len += sizeof(struct udphdr); + } +#endif +#if defined(__APPLE__) +#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) + mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA); +#else + mout = sctp_get_mbuf_for_msg(len + SCTP_MAX_LINKHDR, 1, M_NOWAIT, 1, MT_DATA); +#endif +#else + mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA); +#endif + if (mout == NULL) { + if (cause) { + sctp_m_freem(cause); + } + return; + } +#if defined(__APPLE__) +#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) + SCTP_BUF_RESV_UF(mout, max_linkhdr); +#else + SCTP_BUF_RESV_UF(mout, SCTP_MAX_LINKHDR); +#endif +#else + SCTP_BUF_RESV_UF(mout, max_linkhdr); +#endif + SCTP_BUF_LEN(mout) = len; + SCTP_BUF_NEXT(mout) = cause; +#if defined(__FreeBSD__) + mout->m_pkthdr.flowid = mflowid; + M_HASHTYPE_SET(mout, mflowtype); +#endif +#ifdef INET + ip = NULL; +#endif +#ifdef INET6 + ip6 = NULL; +#endif + switch (dst->sa_family) { +#ifdef INET + case AF_INET: + src_sin = (struct sockaddr_in *)src; + dst_sin = (struct sockaddr_in *)dst; + ip = mtod(mout, struct ip *); + ip->ip_v = IPVERSION; + ip->ip_hl = (sizeof(struct ip) >> 2); + ip->ip_tos = 0; +#if defined(__FreeBSD__) + ip->ip_id = ip_newid(); +#elif defined(__APPLE__) +#if RANDOM_IP_ID + ip->ip_id = ip_randomid(); +#else + ip->ip_id = htons(ip_id++); +#endif +#else + ip->ip_id = htons(ip_id++); +#endif + ip->ip_off = 0; + ip->ip_ttl = MODULE_GLOBAL(ip_defttl); + if (port) { + ip->ip_p = IPPROTO_UDP; + } else { + ip->ip_p = IPPROTO_SCTP; + } + ip->ip_src.s_addr = dst_sin->sin_addr.s_addr; + ip->ip_dst.s_addr = src_sin->sin_addr.s_addr; + ip->ip_sum = 0; + len = sizeof(struct ip); + shout = (struct sctphdr *)((caddr_t)ip + len); + break; +#endif +#ifdef INET6 + case AF_INET6: + src_sin6 = (struct sockaddr_in6 *)src; + dst_sin6 = (struct sockaddr_in6 *)dst; + ip6 = mtod(mout, struct ip6_hdr *); + ip6->ip6_flow = htonl(0x60000000); +#if defined(__FreeBSD__) + if (V_ip6_auto_flowlabel) { + ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); + } +#endif +#if defined(__Userspace__) + ip6->ip6_hlim = IPv6_HOP_LIMIT; +#else + ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim); +#endif + if (port) { + ip6->ip6_nxt = IPPROTO_UDP; + } else { + ip6->ip6_nxt = IPPROTO_SCTP; + } + ip6->ip6_src = dst_sin6->sin6_addr; + ip6->ip6_dst = src_sin6->sin6_addr; + len = sizeof(struct ip6_hdr); + shout = (struct sctphdr *)((caddr_t)ip6 + len); + break; +#endif + default: + len = 0; + shout = mtod(mout, struct sctphdr *); + break; + } +#if defined(INET) || defined(INET6) + if (port) { + if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) { + sctp_m_freem(mout); + return; + } + udp = (struct udphdr *)shout; + udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); + udp->uh_dport = port; + udp->uh_sum = 0; + udp->uh_ulen = htons(sizeof(struct udphdr) + + sizeof(struct sctphdr) + + sizeof(struct sctp_chunkhdr) + + cause_len + padding_len); + len += sizeof(struct udphdr); + shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr)); + } else { + udp = NULL; + } +#endif + shout->src_port = sh->dest_port; + shout->dest_port = sh->src_port; + shout->checksum = 0; + if (vtag) { + shout->v_tag = htonl(vtag); + } else { + shout->v_tag = sh->v_tag; + } + len += sizeof(struct sctphdr); + ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr)); + ch->chunk_type = type; + if (vtag) { + ch->chunk_flags = 0; + } else { + ch->chunk_flags = SCTP_HAD_NO_TCB; + } + ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len); + len += sizeof(struct sctp_chunkhdr); + len += cause_len + padding_len; + + if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { + sctp_m_freem(mout); + return; + } + SCTP_ATTACH_CHAIN(o_pak, mout, len); + switch (dst->sa_family) { +#ifdef INET + case AF_INET: +#if defined(__APPLE__) || defined(__Panda__) + /* zap the stack pointer to the route */ + bzero(&ro, sizeof(sctp_route_t)); +#if defined(__Panda__) + ro._l_addr.sa.sa_family = AF_INET; +#endif +#endif + if (port) { +#if !defined(__Windows__) && !defined(__Userspace__) +#if defined(__FreeBSD__) && ((__FreeBSD_version > 803000 && __FreeBSD_version < 900000) || __FreeBSD_version > 900000) + if (V_udp_cksum) { + udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP)); + } else { + udp->uh_sum = 0; + } +#else + udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP)); +#endif +#else + udp->uh_sum = 0; +#endif + } +#if defined(__FreeBSD__) +#if __FreeBSD_version >= 1000000 + ip->ip_len = htons(len); +#else + ip->ip_len = len; +#endif +#elif defined(__APPLE__) || defined(__Userspace__) + ip->ip_len = len; +#else + ip->ip_len = htons(len); +#endif + if (port) { +#if defined(SCTP_WITH_NO_CSUM) + SCTP_STAT_INCR(sctps_sendnocrc); +#else + shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr)); + SCTP_STAT_INCR(sctps_sendswcrc); +#endif +#if defined(__FreeBSD__) && ((__FreeBSD_version > 803000 && __FreeBSD_version < 900000) || __FreeBSD_version > 900000) + if (V_udp_cksum) { + SCTP_ENABLE_UDP_CSUM(o_pak); + } +#else + SCTP_ENABLE_UDP_CSUM(o_pak); +#endif + } else { +#if defined(SCTP_WITH_NO_CSUM) + SCTP_STAT_INCR(sctps_sendnocrc); +#else +#if defined(__FreeBSD__) && __FreeBSD_version >= 800000 + mout->m_pkthdr.csum_flags = CSUM_SCTP; + mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); + SCTP_STAT_INCR(sctps_sendhwcrc); +#else + shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip)); + SCTP_STAT_INCR(sctps_sendswcrc); +#endif +#endif + } +#ifdef SCTP_PACKET_LOGGING + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { + sctp_packet_log(o_pak); + } +#endif +#if defined(__APPLE__) || defined(__Panda__) + SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id); + /* Free the route if we got one back */ + if (ro.ro_rt) { + RTFREE(ro.ro_rt); + ro.ro_rt = NULL; + } +#else + SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id); +#endif + break; +#endif +#ifdef INET6 + case AF_INET6: + ip6->ip6_plen = len - sizeof(struct ip6_hdr); + if (port) { +#if defined(SCTP_WITH_NO_CSUM) + SCTP_STAT_INCR(sctps_sendnocrc); +#else + shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr)); + SCTP_STAT_INCR(sctps_sendswcrc); +#endif +#if defined(__Windows__) + udp->uh_sum = 0; +#elif !defined(__Userspace__) + if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) { + udp->uh_sum = 0xffff; + } +#endif + } else { +#if defined(SCTP_WITH_NO_CSUM) + SCTP_STAT_INCR(sctps_sendnocrc); +#else +#if defined(__FreeBSD__) && __FreeBSD_version >= 900000 +#if __FreeBSD_version > 901000 + mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6; +#else + mout->m_pkthdr.csum_flags = CSUM_SCTP; +#endif + mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); + SCTP_STAT_INCR(sctps_sendhwcrc); +#else + shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr)); + SCTP_STAT_INCR(sctps_sendswcrc); +#endif +#endif + } +#ifdef SCTP_PACKET_LOGGING + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { + sctp_packet_log(o_pak); + } +#endif + SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id); + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + { + char *buffer; + struct sockaddr_conn *sconn; + + sconn = (struct sockaddr_conn *)src; +#if defined(SCTP_WITH_NO_CSUM) + SCTP_STAT_INCR(sctps_sendnocrc); +#else + shout->checksum = sctp_calculate_cksum(mout, 0); + SCTP_STAT_INCR(sctps_sendswcrc); +#endif +#ifdef SCTP_PACKET_LOGGING + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { + sctp_packet_log(mout); + } +#endif + /* Don't alloc/free for each packet */ + if ((buffer = malloc(len)) != NULL) { + m_copydata(mout, 0, len, buffer); + SCTP_BASE_VAR(conn_output)(sconn->sconn_addr, buffer, len, 0, 0); + free(buffer); + } + sctp_m_freem(mout); + break; + } +#endif + default: + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n", + dst->sa_family); + sctp_m_freem(mout); + SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT); + return; + } + SCTP_STAT_INCR(sctps_sendpackets); + SCTP_STAT_INCR_COUNTER64(sctps_outpackets); + SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); + return; +} + +void +sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst, + struct sctphdr *sh, +#if defined(__FreeBSD__) + uint8_t mflowtype, uint32_t mflowid, +#endif + uint32_t vrf_id, uint16_t port) +{ + sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL, +#if defined(__FreeBSD__) + mflowtype, mflowid, +#endif + vrf_id, port); +} + +void +sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net,int so_locked +#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) + SCTP_UNUSED +#endif +) +{ + struct sctp_tmit_chunk *chk; + struct sctp_heartbeat_chunk *hb; + struct timeval now; + + SCTP_TCB_LOCK_ASSERT(stcb); + if (net == NULL) { + return; + } + (void)SCTP_GETTIME_TIMEVAL(&now); + switch (net->ro._l_addr.sa.sa_family) { +#ifdef INET + case AF_INET: + break; +#endif +#ifdef INET6 + case AF_INET6: + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + break; +#endif + default: + return; + } + sctp_alloc_a_chunk(stcb, chk); + if (chk == NULL) { + SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n"); + return; + } + + chk->copy_by_ref = 0; + chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST; + chk->rec.chunk_id.can_take_data = 1; + chk->flags = 0; + chk->asoc = &stcb->asoc; + chk->send_size = sizeof(struct sctp_heartbeat_chunk); + + chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER); + if (chk->data == NULL) { + sctp_free_a_chunk(stcb, chk, so_locked); + return; + } + SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); + SCTP_BUF_LEN(chk->data) = chk->send_size; + chk->sent = SCTP_DATAGRAM_UNSENT; + chk->snd_count = 0; + chk->whoTo = net; + atomic_add_int(&chk->whoTo->ref_count, 1); + /* Now we have a mbuf that we can fill in with the details */ + hb = mtod(chk->data, struct sctp_heartbeat_chunk *); + memset(hb, 0, sizeof(struct sctp_heartbeat_chunk)); + /* fill out chunk header */ + hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST; + hb->ch.chunk_flags = 0; + hb->ch.chunk_length = htons(chk->send_size); + /* Fill out hb parameter */ + hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO); + hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param)); + hb->heartbeat.hb_info.time_value_1 = now.tv_sec; + hb->heartbeat.hb_info.time_value_2 = now.tv_usec; + /* Did our user request this one, put it in */ + hb->heartbeat.hb_info.addr_family = (uint8_t)net->ro._l_addr.sa.sa_family; +#ifdef HAVE_SA_LEN + hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len; +#else + switch (net->ro._l_addr.sa.sa_family) { +#ifdef INET + case AF_INET: + hb->heartbeat.hb_info.addr_len = sizeof(struct sockaddr_in); + break; +#endif +#ifdef INET6 + case AF_INET6: + hb->heartbeat.hb_info.addr_len = sizeof(struct sockaddr_in6); + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + hb->heartbeat.hb_info.addr_len = sizeof(struct sockaddr_conn); + break; +#endif + default: + hb->heartbeat.hb_info.addr_len = 0; + break; + } +#endif + if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { + /* + * we only take from the entropy pool if the address is not + * confirmed. + */ + net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); + net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); + } else { + net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0; + net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0; + } + switch (net->ro._l_addr.sa.sa_family) { +#ifdef INET + case AF_INET: + memcpy(hb->heartbeat.hb_info.address, + &net->ro._l_addr.sin.sin_addr, + sizeof(net->ro._l_addr.sin.sin_addr)); + break; +#endif +#ifdef INET6 + case AF_INET6: + memcpy(hb->heartbeat.hb_info.address, + &net->ro._l_addr.sin6.sin6_addr, + sizeof(net->ro._l_addr.sin6.sin6_addr)); + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + memcpy(hb->heartbeat.hb_info.address, + &net->ro._l_addr.sconn.sconn_addr, + sizeof(net->ro._l_addr.sconn.sconn_addr)); + break; +#endif + default: + return; + break; + } + net->hb_responded = 0; + TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); + stcb->asoc.ctrl_queue_cnt++; + SCTP_STAT_INCR(sctps_sendheartbeat); + return; +} + +void +sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net, + uint32_t high_tsn) +{ + struct sctp_association *asoc; + struct sctp_ecne_chunk *ecne; + struct sctp_tmit_chunk *chk; + + if (net == NULL) { + return; + } + asoc = &stcb->asoc; + SCTP_TCB_LOCK_ASSERT(stcb); + TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { + if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) { + /* found a previous ECN_ECHO update it if needed */ + uint32_t cnt, ctsn; + ecne = mtod(chk->data, struct sctp_ecne_chunk *); + ctsn = ntohl(ecne->tsn); + if (SCTP_TSN_GT(high_tsn, ctsn)) { + ecne->tsn = htonl(high_tsn); + SCTP_STAT_INCR(sctps_queue_upd_ecne); + } + cnt = ntohl(ecne->num_pkts_since_cwr); + cnt++; + ecne->num_pkts_since_cwr = htonl(cnt); + return; + } + } + /* nope could not find one to update so we must build one */ + sctp_alloc_a_chunk(stcb, chk); + if (chk == NULL) { + return; + } + SCTP_STAT_INCR(sctps_queue_upd_ecne); + chk->copy_by_ref = 0; + chk->rec.chunk_id.id = SCTP_ECN_ECHO; + chk->rec.chunk_id.can_take_data = 0; + chk->flags = 0; + chk->asoc = &stcb->asoc; + chk->send_size = sizeof(struct sctp_ecne_chunk); + chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER); + if (chk->data == NULL) { + sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); + return; + } + SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); + SCTP_BUF_LEN(chk->data) = chk->send_size; + chk->sent = SCTP_DATAGRAM_UNSENT; + chk->snd_count = 0; + chk->whoTo = net; + atomic_add_int(&chk->whoTo->ref_count, 1); + + stcb->asoc.ecn_echo_cnt_onq++; + ecne = mtod(chk->data, struct sctp_ecne_chunk *); + ecne->ch.chunk_type = SCTP_ECN_ECHO; + ecne->ch.chunk_flags = 0; + ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk)); + ecne->tsn = htonl(high_tsn); + ecne->num_pkts_since_cwr = htonl(1); + TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next); + asoc->ctrl_queue_cnt++; +} + +void +sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net, + struct mbuf *m, int len, int iphlen, int bad_crc) +{ + struct sctp_association *asoc; + struct sctp_pktdrop_chunk *drp; + struct sctp_tmit_chunk *chk; + uint8_t *datap; + int was_trunc = 0; + int fullsz = 0; + long spc; + int offset; + struct sctp_chunkhdr *ch, chunk_buf; + unsigned int chk_length; + + if (!stcb) { + return; + } + asoc = &stcb->asoc; + SCTP_TCB_LOCK_ASSERT(stcb); + if (asoc->pktdrop_supported == 0) { + /*- + * peer must declare support before I send one. + */ + return; + } + if (stcb->sctp_socket == NULL) { + return; + } + sctp_alloc_a_chunk(stcb, chk); + if (chk == NULL) { + return; + } + chk->copy_by_ref = 0; + chk->rec.chunk_id.id = SCTP_PACKET_DROPPED; + chk->rec.chunk_id.can_take_data = 1; + chk->flags = 0; + len -= iphlen; + chk->send_size = len; + /* Validate that we do not have an ABORT in here. */ + offset = iphlen + sizeof(struct sctphdr); + ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, + sizeof(*ch), (uint8_t *) & chunk_buf); + while (ch != NULL) { + chk_length = ntohs(ch->chunk_length); + if (chk_length < sizeof(*ch)) { + /* break to abort land */ + break; + } + switch (ch->chunk_type) { + case SCTP_PACKET_DROPPED: + case SCTP_ABORT_ASSOCIATION: + case SCTP_INITIATION_ACK: + /** + * We don't respond with an PKT-DROP to an ABORT + * or PKT-DROP. We also do not respond to an + * INIT-ACK, because we can't know if the initiation + * tag is correct or not. + */ + sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); + return; + default: + break; + } + offset += SCTP_SIZE32(chk_length); + ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, + sizeof(*ch), (uint8_t *) & chunk_buf); + } + + if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) > + min(stcb->asoc.smallest_mtu, MCLBYTES)) { + /* only send 1 mtu worth, trim off the + * excess on the end. + */ + fullsz = len; + len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD; + was_trunc = 1; + } + chk->asoc = &stcb->asoc; + chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); + if (chk->data == NULL) { +jump_out: + sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); + return; + } + SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); + drp = mtod(chk->data, struct sctp_pktdrop_chunk *); + if (drp == NULL) { + sctp_m_freem(chk->data); + chk->data = NULL; + goto jump_out; + } + chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) + + sizeof(struct sctphdr) + SCTP_MED_OVERHEAD)); + chk->book_size_scale = 0; + if (was_trunc) { + drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED; + drp->trunc_len = htons(fullsz); + /* Len is already adjusted to size minus overhead above + * take out the pkt_drop chunk itself from it. + */ + chk->send_size = len - sizeof(struct sctp_pktdrop_chunk); + len = chk->send_size; + } else { + /* no truncation needed */ + drp->ch.chunk_flags = 0; + drp->trunc_len = htons(0); + } + if (bad_crc) { + drp->ch.chunk_flags |= SCTP_BADCRC; + } + chk->send_size += sizeof(struct sctp_pktdrop_chunk); + SCTP_BUF_LEN(chk->data) = chk->send_size; + chk->sent = SCTP_DATAGRAM_UNSENT; + chk->snd_count = 0; + if (net) { + /* we should hit here */ + chk->whoTo = net; + atomic_add_int(&chk->whoTo->ref_count, 1); + } else { + chk->whoTo = NULL; + } + drp->ch.chunk_type = SCTP_PACKET_DROPPED; + drp->ch.chunk_length = htons(chk->send_size); + spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket); + if (spc < 0) { + spc = 0; + } + drp->bottle_bw = htonl(spc); + if (asoc->my_rwnd) { + drp->current_onq = htonl(asoc->size_on_reasm_queue + + asoc->size_on_all_streams + + asoc->my_rwnd_control_len + + stcb->sctp_socket->so_rcv.sb_cc); + } else { + /*- + * If my rwnd is 0, possibly from mbuf depletion as well as + * space used, tell the peer there is NO space aka onq == bw + */ + drp->current_onq = htonl(spc); + } + drp->reserved = 0; + datap = drp->data; + m_copydata(m, iphlen, len, (caddr_t)datap); + TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); + asoc->ctrl_queue_cnt++; +} + +void +sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override) +{ + struct sctp_association *asoc; + struct sctp_cwr_chunk *cwr; + struct sctp_tmit_chunk *chk; + + SCTP_TCB_LOCK_ASSERT(stcb); + if (net == NULL) { + return; + } + asoc = &stcb->asoc; + TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { + if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) { + /* found a previous CWR queued to same destination update it if needed */ + uint32_t ctsn; + cwr = mtod(chk->data, struct sctp_cwr_chunk *); + ctsn = ntohl(cwr->tsn); + if (SCTP_TSN_GT(high_tsn, ctsn)) { + cwr->tsn = htonl(high_tsn); + } + if (override & SCTP_CWR_REDUCE_OVERRIDE) { + /* Make sure override is carried */ + cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE; + } + return; + } + } + sctp_alloc_a_chunk(stcb, chk); + if (chk == NULL) { + return; + } + chk->copy_by_ref = 0; + chk->rec.chunk_id.id = SCTP_ECN_CWR; + chk->rec.chunk_id.can_take_data = 1; + chk->flags = 0; + chk->asoc = &stcb->asoc; + chk->send_size = sizeof(struct sctp_cwr_chunk); + chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER); + if (chk->data == NULL) { + sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); + return; + } + SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); + SCTP_BUF_LEN(chk->data) = chk->send_size; + chk->sent = SCTP_DATAGRAM_UNSENT; + chk->snd_count = 0; + chk->whoTo = net; + atomic_add_int(&chk->whoTo->ref_count, 1); + cwr = mtod(chk->data, struct sctp_cwr_chunk *); + cwr->ch.chunk_type = SCTP_ECN_CWR; + cwr->ch.chunk_flags = override; + cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk)); + cwr->tsn = htonl(high_tsn); + TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); + asoc->ctrl_queue_cnt++; +} + +void +sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk, + int number_entries, uint16_t * list, + uint32_t seq, uint32_t resp_seq, uint32_t last_sent) +{ + uint16_t len, old_len, i; + struct sctp_stream_reset_out_request *req_out; + struct sctp_chunkhdr *ch; + + ch = mtod(chk->data, struct sctp_chunkhdr *); + old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); + + /* get to new offset for the param. */ + req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len); + /* now how long will this param be? */ + len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries)); + req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST); + req_out->ph.param_length = htons(len); + req_out->request_seq = htonl(seq); + req_out->response_seq = htonl(resp_seq); + req_out->send_reset_at_tsn = htonl(last_sent); + if (number_entries) { + for (i = 0; i < number_entries; i++) { + req_out->list_of_streams[i] = htons(list[i]); + } + } + if (SCTP_SIZE32(len) > len) { + /*- + * Need to worry about the pad we may end up adding to the + * end. This is easy since the struct is either aligned to 4 + * bytes or 2 bytes off. + */ + req_out->list_of_streams[number_entries] = 0; + } + /* now fix the chunk length */ + ch->chunk_length = htons(len + old_len); + chk->book_size = len + old_len; + chk->book_size_scale = 0; + chk->send_size = SCTP_SIZE32(chk->book_size); + SCTP_BUF_LEN(chk->data) = chk->send_size; + return; +} + +static void +sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk, + int number_entries, uint16_t *list, + uint32_t seq) +{ + uint16_t len, old_len, i; + struct sctp_stream_reset_in_request *req_in; + struct sctp_chunkhdr *ch; + + ch = mtod(chk->data, struct sctp_chunkhdr *); + old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); + + /* get to new offset for the param. */ + req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len); + /* now how long will this param be? */ + len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries)); + req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST); + req_in->ph.param_length = htons(len); + req_in->request_seq = htonl(seq); + if (number_entries) { + for (i = 0; i < number_entries; i++) { + req_in->list_of_streams[i] = htons(list[i]); + } + } + if (SCTP_SIZE32(len) > len) { + /*- + * Need to worry about the pad we may end up adding to the + * end. This is easy since the struct is either aligned to 4 + * bytes or 2 bytes off. + */ + req_in->list_of_streams[number_entries] = 0; + } + /* now fix the chunk length */ + ch->chunk_length = htons(len + old_len); + chk->book_size = len + old_len; + chk->book_size_scale = 0; + chk->send_size = SCTP_SIZE32(chk->book_size); + SCTP_BUF_LEN(chk->data) = chk->send_size; + return; +} + +static void +sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk, + uint32_t seq) +{ + uint16_t len, old_len; + struct sctp_stream_reset_tsn_request *req_tsn; + struct sctp_chunkhdr *ch; + + ch = mtod(chk->data, struct sctp_chunkhdr *); + old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); + + /* get to new offset for the param. */ + req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len); + /* now how long will this param be? */ + len = sizeof(struct sctp_stream_reset_tsn_request); + req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST); + req_tsn->ph.param_length = htons(len); + req_tsn->request_seq = htonl(seq); + + /* now fix the chunk length */ + ch->chunk_length = htons(len + old_len); + chk->send_size = len + old_len; + chk->book_size = SCTP_SIZE32(chk->send_size); + chk->book_size_scale = 0; + SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); + return; +} + +void +sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk, + uint32_t resp_seq, uint32_t result) +{ + uint16_t len, old_len; + struct sctp_stream_reset_response *resp; + struct sctp_chunkhdr *ch; + + ch = mtod(chk->data, struct sctp_chunkhdr *); + old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); + + /* get to new offset for the param. */ + resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len); + /* now how long will this param be? */ + len = sizeof(struct sctp_stream_reset_response); + resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE); + resp->ph.param_length = htons(len); + resp->response_seq = htonl(resp_seq); + resp->result = ntohl(result); + + /* now fix the chunk length */ + ch->chunk_length = htons(len + old_len); + chk->book_size = len + old_len; + chk->book_size_scale = 0; + chk->send_size = SCTP_SIZE32(chk->book_size); + SCTP_BUF_LEN(chk->data) = chk->send_size; + return; +} + +void +sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk, + uint32_t resp_seq, uint32_t result, + uint32_t send_una, uint32_t recv_next) +{ + uint16_t len, old_len; + struct sctp_stream_reset_response_tsn *resp; + struct sctp_chunkhdr *ch; + + ch = mtod(chk->data, struct sctp_chunkhdr *); + old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); + + /* get to new offset for the param. */ + resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len); + /* now how long will this param be? */ + len = sizeof(struct sctp_stream_reset_response_tsn); + resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE); + resp->ph.param_length = htons(len); + resp->response_seq = htonl(resp_seq); + resp->result = htonl(result); + resp->senders_next_tsn = htonl(send_una); + resp->receivers_next_tsn = htonl(recv_next); + + /* now fix the chunk length */ + ch->chunk_length = htons(len + old_len); + chk->book_size = len + old_len; + chk->send_size = SCTP_SIZE32(chk->book_size); + chk->book_size_scale = 0; + SCTP_BUF_LEN(chk->data) = chk->send_size; + return; +} + +static void +sctp_add_an_out_stream(struct sctp_tmit_chunk *chk, + uint32_t seq, + uint16_t adding) +{ + uint16_t len, old_len; + struct sctp_chunkhdr *ch; + struct sctp_stream_reset_add_strm *addstr; + + ch = mtod(chk->data, struct sctp_chunkhdr *); + old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); + + /* get to new offset for the param. */ + addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len); + /* now how long will this param be? */ + len = sizeof(struct sctp_stream_reset_add_strm); + + /* Fill it out. */ + addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS); + addstr->ph.param_length = htons(len); + addstr->request_seq = htonl(seq); + addstr->number_of_streams = htons(adding); + addstr->reserved = 0; + + /* now fix the chunk length */ + ch->chunk_length = htons(len + old_len); + chk->send_size = len + old_len; + chk->book_size = SCTP_SIZE32(chk->send_size); + chk->book_size_scale = 0; + SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); + return; +} + +static void +sctp_add_an_in_stream(struct sctp_tmit_chunk *chk, + uint32_t seq, + uint16_t adding) +{ + uint16_t len, old_len; + struct sctp_chunkhdr *ch; + struct sctp_stream_reset_add_strm *addstr; + + ch = mtod(chk->data, struct sctp_chunkhdr *); + old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); + + /* get to new offset for the param. */ + addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len); + /* now how long will this param be? */ + len = sizeof(struct sctp_stream_reset_add_strm); + /* Fill it out. */ + addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS); + addstr->ph.param_length = htons(len); + addstr->request_seq = htonl(seq); + addstr->number_of_streams = htons(adding); + addstr->reserved = 0; + + /* now fix the chunk length */ + ch->chunk_length = htons(len + old_len); + chk->send_size = len + old_len; + chk->book_size = SCTP_SIZE32(chk->send_size); + chk->book_size_scale = 0; + SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); + return; +} + +int +sctp_send_str_reset_req(struct sctp_tcb *stcb, + uint16_t number_entries, uint16_t *list, + uint8_t send_out_req, + uint8_t send_in_req, + uint8_t send_tsn_req, + uint8_t add_stream, + uint16_t adding_o, + uint16_t adding_i, uint8_t peer_asked) +{ + + struct sctp_association *asoc; + struct sctp_tmit_chunk *chk; + struct sctp_chunkhdr *ch; + uint32_t seq; + + asoc = &stcb->asoc; + if (asoc->stream_reset_outstanding) { + /*- + * Already one pending, must get ACK back to clear the flag. + */ + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY); + return (EBUSY); + } + if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) && + (add_stream == 0)) { + /* nothing to do */ + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); + return (EINVAL); + } + if (send_tsn_req && (send_out_req || send_in_req)) { + /* error, can't do that */ + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); + return (EINVAL); + } + if (number_entries > (MCLBYTES - + SCTP_MIN_OVERHEAD - + sizeof(struct sctp_chunkhdr) - + sizeof(struct sctp_stream_reset_out_request)) / + sizeof(uint16_t)) { + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + return (ENOMEM); + } + sctp_alloc_a_chunk(stcb, chk); + if (chk == NULL) { + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + return (ENOMEM); + } + chk->copy_by_ref = 0; + chk->rec.chunk_id.id = SCTP_STREAM_RESET; + chk->rec.chunk_id.can_take_data = 0; + chk->flags = 0; + chk->asoc = &stcb->asoc; + chk->book_size = sizeof(struct sctp_chunkhdr); + chk->send_size = SCTP_SIZE32(chk->book_size); + chk->book_size_scale = 0; + + chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); + if (chk->data == NULL) { + sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED); + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + return (ENOMEM); + } + SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); + + /* setup chunk parameters */ + chk->sent = SCTP_DATAGRAM_UNSENT; + chk->snd_count = 0; + if (stcb->asoc.alternate) { + chk->whoTo = stcb->asoc.alternate; + } else { + chk->whoTo = stcb->asoc.primary_destination; + } + atomic_add_int(&chk->whoTo->ref_count, 1); + ch = mtod(chk->data, struct sctp_chunkhdr *); + ch->chunk_type = SCTP_STREAM_RESET; + ch->chunk_flags = 0; + ch->chunk_length = htons(chk->book_size); + SCTP_BUF_LEN(chk->data) = chk->send_size; + + seq = stcb->asoc.str_reset_seq_out; + if (send_out_req) { + sctp_add_stream_reset_out(chk, number_entries, list, + seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1)); + asoc->stream_reset_out_is_outstanding = 1; + seq++; + asoc->stream_reset_outstanding++; + } + if ((add_stream & 1) && + ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) { + /* Need to allocate more */ + struct sctp_stream_out *oldstream; + struct sctp_stream_queue_pending *sp, *nsp; + int i; +#if defined(SCTP_DETAILED_STR_STATS) + int j; +#endif + + oldstream = stcb->asoc.strmout; + /* get some more */ + SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *, + ((stcb->asoc.streamoutcnt+adding_o) * sizeof(struct sctp_stream_out)), + SCTP_M_STRMO); + if (stcb->asoc.strmout == NULL) { + uint8_t x; + stcb->asoc.strmout = oldstream; + /* Turn off the bit */ + x = add_stream & 0xfe; + add_stream = x; + goto skip_stuff; + } + /* Ok now we proceed with copying the old out stuff and + * initializing the new stuff. + */ + SCTP_TCB_SEND_LOCK(stcb); + stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1); + for (i = 0; i < stcb->asoc.streamoutcnt; i++) { + TAILQ_INIT(&stcb->asoc.strmout[i].outqueue); + stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues; + stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send; + stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete; + stcb->asoc.strmout[i].stream_no = i; + stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]); + /* now anything on those queues? */ + TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) { + TAILQ_REMOVE(&oldstream[i].outqueue, sp, next); + TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next); + } + /* Now move assoc pointers too */ + if (stcb->asoc.last_out_stream == &oldstream[i]) { + stcb->asoc.last_out_stream = &stcb->asoc.strmout[i]; + } + if (stcb->asoc.locked_on_sending == &oldstream[i]) { + stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i]; + } + } + /* now the new streams */ + stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1); + for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) { + TAILQ_INIT(&stcb->asoc.strmout[i].outqueue); + stcb->asoc.strmout[i].chunks_on_queues = 0; +#if defined(SCTP_DETAILED_STR_STATS) + for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) { + stcb->asoc.strmout[i].abandoned_sent[j] = 0; + stcb->asoc.strmout[i].abandoned_unsent[j] = 0; + } +#else + stcb->asoc.strmout[i].abandoned_sent[0] = 0; + stcb->asoc.strmout[i].abandoned_unsent[0] = 0; +#endif + stcb->asoc.strmout[i].next_sequence_send = 0x0; + stcb->asoc.strmout[i].stream_no = i; + stcb->asoc.strmout[i].last_msg_incomplete = 0; + stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL); + } + stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o; + SCTP_FREE(oldstream, SCTP_M_STRMO); + SCTP_TCB_SEND_UNLOCK(stcb); + } +skip_stuff: + if ((add_stream & 1) && (adding_o > 0)) { + asoc->strm_pending_add_size = adding_o; + asoc->peer_req_out = peer_asked; + sctp_add_an_out_stream(chk, seq, adding_o); + seq++; + asoc->stream_reset_outstanding++; + } + if ((add_stream & 2) && (adding_i > 0)) { + sctp_add_an_in_stream(chk, seq, adding_i); + seq++; + asoc->stream_reset_outstanding++; + } + if (send_in_req) { + sctp_add_stream_reset_in(chk, number_entries, list, seq); + seq++; + asoc->stream_reset_outstanding++; + } + if (send_tsn_req) { + sctp_add_stream_reset_tsn(chk, seq); + asoc->stream_reset_outstanding++; + } + asoc->str_reset = chk; + /* insert the chunk for sending */ + TAILQ_INSERT_TAIL(&asoc->control_send_queue, + chk, + sctp_next); + asoc->ctrl_queue_cnt++; + sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo); + return (0); +} + +void +sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst, + struct sctphdr *sh, uint32_t vtag, struct mbuf *cause, +#if defined(__FreeBSD__) + uint8_t mflowtype, uint32_t mflowid, +#endif + uint32_t vrf_id, uint16_t port) +{ + /* Don't respond to an ABORT with an ABORT. */ + if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) { + if (cause) + sctp_m_freem(cause); + return; + } + sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause, +#if defined(__FreeBSD__) + mflowtype, mflowid, +#endif + vrf_id, port); + return; +} + +void +sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst, + struct sctphdr *sh, uint32_t vtag, struct mbuf *cause, +#if defined(__FreeBSD__) + uint8_t mflowtype, uint32_t mflowid, +#endif + uint32_t vrf_id, uint16_t port) +{ + sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause, +#if defined(__FreeBSD__) + mflowtype, mflowid, +#endif + vrf_id, port); + return; +} + +static struct mbuf * +sctp_copy_resume(struct uio *uio, + int max_send_len, +#if defined(__FreeBSD__) && __FreeBSD_version > 602000 + int user_marks_eor, +#endif + int *error, + uint32_t *sndout, + struct mbuf **new_tail) +{ +#if defined(__Panda__) + struct mbuf *m; + + m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0, + (user_marks_eor ? M_EOR : 0)); + if (m == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS); + *error = ENOBUFS; + } else { + *sndout = m_length(m, NULL); + *new_tail = m_last(m); + } + return (m); +#elif defined(__FreeBSD__) && __FreeBSD_version > 602000 + struct mbuf *m; + + m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0, + (M_PKTHDR | (user_marks_eor ? M_EOR : 0))); + if (m == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS); + *error = ENOBUFS; + } else { + *sndout = m_length(m, NULL); + *new_tail = m_last(m); + } + return (m); +#else + int left, cancpy, willcpy; + struct mbuf *m, *head; + +#if defined(__APPLE__) +#if defined(APPLE_LEOPARD) + left = min(uio->uio_resid, max_send_len); +#else + left = min(uio_resid(uio), max_send_len); +#endif +#else + left = min(uio->uio_resid, max_send_len); +#endif + /* Always get a header just in case */ + head = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 0, MT_DATA); + if (head == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS); + *error = ENOBUFS; + return (NULL); + } + cancpy = M_TRAILINGSPACE(head); + willcpy = min(cancpy, left); + *error = uiomove(mtod(head, caddr_t), willcpy, uio); + if (*error) { + sctp_m_freem(head); + return (NULL); + } + *sndout += willcpy; + left -= willcpy; + SCTP_BUF_LEN(head) = willcpy; + m = head; + *new_tail = head; + while (left > 0) { + /* move in user data */ + SCTP_BUF_NEXT(m) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 0, MT_DATA); + if (SCTP_BUF_NEXT(m) == NULL) { + sctp_m_freem(head); + *new_tail = NULL; + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS); + *error = ENOBUFS; + return (NULL); + } + m = SCTP_BUF_NEXT(m); + cancpy = M_TRAILINGSPACE(m); + willcpy = min(cancpy, left); + *error = uiomove(mtod(m, caddr_t), willcpy, uio); + if (*error) { + sctp_m_freem(head); + *new_tail = NULL; + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT); + *error = EFAULT; + return (NULL); + } + SCTP_BUF_LEN(m) = willcpy; + left -= willcpy; + *sndout += willcpy; + *new_tail = m; + if (left == 0) { + SCTP_BUF_NEXT(m) = NULL; + } + } + return (head); +#endif +} + +static int +sctp_copy_one(struct sctp_stream_queue_pending *sp, + struct uio *uio, + int resv_upfront) +{ + int left; +#if defined(__Panda__) + left = sp->length; + sp->data = m_uiotombuf(uio, M_WAITOK, sp->length, + resv_upfront, 0); + if (sp->data == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS); + return (ENOBUFS); + } + + sp->tail_mbuf = m_last(sp->data); + return (0); + +#elif defined(__FreeBSD__) && __FreeBSD_version > 602000 + left = sp->length; + sp->data = m_uiotombuf(uio, M_WAITOK, sp->length, + resv_upfront, 0); + if (sp->data == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS); + return (ENOBUFS); + } + + sp->tail_mbuf = m_last(sp->data); + return (0); +#else + int cancpy, willcpy, error; + struct mbuf *m, *head; + int cpsz = 0; + + /* First one gets a header */ + left = sp->length; + head = m = sctp_get_mbuf_for_msg((left + resv_upfront), 0, M_WAITOK, 0, MT_DATA); + if (m == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS); + return (ENOBUFS); + } + /*- + * Add this one for m in now, that way if the alloc fails we won't + * have a bad cnt. + */ + SCTP_BUF_RESV_UF(m, resv_upfront); + cancpy = M_TRAILINGSPACE(m); + willcpy = min(cancpy, left); + while (left > 0) { + /* move in user data */ + error = uiomove(mtod(m, caddr_t), willcpy, uio); + if (error) { + sctp_m_freem(head); + return (error); + } + SCTP_BUF_LEN(m) = willcpy; + left -= willcpy; + cpsz += willcpy; + if (left > 0) { + SCTP_BUF_NEXT(m) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 0, MT_DATA); + if (SCTP_BUF_NEXT(m) == NULL) { + /* + * the head goes back to caller, he can free + * the rest + */ + sctp_m_freem(head); + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS); + return (ENOBUFS); + } + m = SCTP_BUF_NEXT(m); + cancpy = M_TRAILINGSPACE(m); + willcpy = min(cancpy, left); + } else { + sp->tail_mbuf = m; + SCTP_BUF_NEXT(m) = NULL; + } + } + sp->data = head; + sp->length = cpsz; + return (0); +#endif +} + + + +static struct sctp_stream_queue_pending * +sctp_copy_it_in(struct sctp_tcb *stcb, + struct sctp_association *asoc, + struct sctp_sndrcvinfo *srcv, + struct uio *uio, + struct sctp_nets *net, + int max_send_len, + int user_marks_eor, + int *error) + +{ + /*- + * This routine must be very careful in its work. Protocol + * processing is up and running so care must be taken to spl...() + * when you need to do something that may effect the stcb/asoc. The + * sb is locked however. When data is copied the protocol processing + * should be enabled since this is a slower operation... + */ + struct sctp_stream_queue_pending *sp = NULL; + int resv_in_first; + + *error = 0; + /* Now can we send this? */ + if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) || + (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || + (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || + (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) { + /* got data while shutting down */ + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); + *error = ECONNRESET; + goto out_now; + } + sctp_alloc_a_strmoq(stcb, sp); + if (sp == NULL) { + SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + *error = ENOMEM; + goto out_now; + } + sp->act_flags = 0; + sp->sender_all_done = 0; + sp->sinfo_flags = srcv->sinfo_flags; + sp->timetolive = srcv->sinfo_timetolive; + sp->ppid = srcv->sinfo_ppid; + sp->context = srcv->sinfo_context; + (void)SCTP_GETTIME_TIMEVAL(&sp->ts); + + sp->stream = srcv->sinfo_stream; +#if defined(__APPLE__) +#if defined(APPLE_LEOPARD) + sp->length = min(uio->uio_resid, max_send_len); +#else + sp->length = min(uio_resid(uio), max_send_len); +#endif +#else + sp->length = min(uio->uio_resid, max_send_len); +#endif +#if defined(__APPLE__) +#if defined(APPLE_LEOPARD) + if ((sp->length == (uint32_t)uio->uio_resid) && +#else + if ((sp->length == (uint32_t)uio_resid(uio)) && +#endif +#else + if ((sp->length == (uint32_t)uio->uio_resid) && +#endif + ((user_marks_eor == 0) || + (srcv->sinfo_flags & SCTP_EOF) || + (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) { + sp->msg_is_complete = 1; + } else { + sp->msg_is_complete = 0; + } + sp->sender_all_done = 0; + sp->some_taken = 0; + sp->put_last_out = 0; + resv_in_first = sizeof(struct sctp_data_chunk); + sp->data = sp->tail_mbuf = NULL; + if (sp->length == 0) { + *error = 0; + goto skip_copy; + } + if (srcv->sinfo_keynumber_valid) { + sp->auth_keyid = srcv->sinfo_keynumber; + } else { + sp->auth_keyid = stcb->asoc.authinfo.active_keyid; + } + if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) { + sctp_auth_key_acquire(stcb, sp->auth_keyid); + sp->holds_key_ref = 1; + } +#if defined(__APPLE__) + SCTP_SOCKET_UNLOCK(SCTP_INP_SO(stcb->sctp_ep), 0); +#endif + *error = sctp_copy_one(sp, uio, resv_in_first); +#if defined(__APPLE__) + SCTP_SOCKET_LOCK(SCTP_INP_SO(stcb->sctp_ep), 0); +#endif + skip_copy: + if (*error) { + sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); + sp = NULL; + } else { + if (sp->sinfo_flags & SCTP_ADDR_OVER) { + sp->net = net; + atomic_add_int(&sp->net->ref_count, 1); + } else { + sp->net = NULL; + } + sctp_set_prsctp_policy(sp); + } +out_now: + return (sp); +} + + +int +sctp_sosend(struct socket *so, + struct sockaddr *addr, + struct uio *uio, +#ifdef __Panda__ + pakhandle_type top, + pakhandle_type icontrol, +#else + struct mbuf *top, + struct mbuf *control, +#endif +#if defined(__APPLE__) || defined(__Panda__) + int flags +#else + int flags, +#if defined(__FreeBSD__) && __FreeBSD_version >= 500000 + struct thread *p +#elif defined(__Windows__) + PKTHREAD p +#else +#if defined(__Userspace__) + /* + * proc is a dummy in __Userspace__ and will not be passed + * to sctp_lower_sosend + */ +#endif + struct proc *p +#endif +#endif +) +{ +#ifdef __Panda__ + struct mbuf *control = NULL; +#endif +#if defined(__APPLE__) + struct proc *p = current_proc(); +#endif + int error, use_sndinfo = 0; + struct sctp_sndrcvinfo sndrcvninfo; + struct sockaddr *addr_to_use; +#if defined(INET) && defined(INET6) + struct sockaddr_in sin; +#endif + +#if defined(__APPLE__) + SCTP_SOCKET_LOCK(so, 1); +#endif +#ifdef __Panda__ + control = SCTP_HEADER_TO_CHAIN(icontrol); +#endif + if (control) { + /* process cmsg snd/rcv info (maybe a assoc-id) */ + if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control, + sizeof(sndrcvninfo))) { + /* got one */ + use_sndinfo = 1; + } + } + addr_to_use = addr; +#if defined(INET) && defined(INET6) + if ((addr) && (addr->sa_family == AF_INET6)) { + struct sockaddr_in6 *sin6; + + sin6 = (struct sockaddr_in6 *)addr; + if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { + in6_sin6_2_sin(&sin, sin6); + addr_to_use = (struct sockaddr *)&sin; + } + } +#endif + error = sctp_lower_sosend(so, addr_to_use, uio, top, +#ifdef __Panda__ + icontrol, +#else + control, +#endif + flags, + use_sndinfo ? &sndrcvninfo: NULL +#if !(defined(__Panda__) || defined(__Userspace__)) + , p +#endif + ); +#if defined(__APPLE__) + SCTP_SOCKET_UNLOCK(so, 1); +#endif + return (error); +} + + +int +sctp_lower_sosend(struct socket *so, + struct sockaddr *addr, + struct uio *uio, +#ifdef __Panda__ + pakhandle_type i_pak, + pakhandle_type i_control, +#else + struct mbuf *i_pak, + struct mbuf *control, +#endif + int flags, + struct sctp_sndrcvinfo *srcv +#if !(defined( __Panda__) || defined(__Userspace__)) + , +#if defined(__FreeBSD__) && __FreeBSD_version >= 500000 + struct thread *p +#elif defined(__Windows__) + PKTHREAD p +#else + struct proc *p +#endif +#endif + ) +{ + unsigned int sndlen = 0, max_len; + int error, len; + struct mbuf *top = NULL; +#ifdef __Panda__ + struct mbuf *control = NULL; +#endif + int queue_only = 0, queue_only_for_init = 0; + int free_cnt_applied = 0; + int un_sent; + int now_filled = 0; + unsigned int inqueue_bytes = 0; + struct sctp_block_entry be; + struct sctp_inpcb *inp; + struct sctp_tcb *stcb = NULL; + struct timeval now; + struct sctp_nets *net; + struct sctp_association *asoc; + struct sctp_inpcb *t_inp; + int user_marks_eor; + int create_lock_applied = 0; + int nagle_applies = 0; + int some_on_control = 0; + int got_all_of_the_send = 0; + int hold_tcblock = 0; + int non_blocking = 0; + uint32_t local_add_more, local_soresv = 0; + uint16_t port; + uint16_t sinfo_flags; + sctp_assoc_t sinfo_assoc_id; + + error = 0; + net = NULL; + stcb = NULL; + asoc = NULL; + +#if defined(__APPLE__) + sctp_lock_assert(so); +#endif + t_inp = inp = (struct sctp_inpcb *)so->so_pcb; + if (inp == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); + error = EINVAL; + if (i_pak) { + SCTP_RELEASE_PKT(i_pak); + } + return (error); + } + if ((uio == NULL) && (i_pak == NULL)) { + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + return (EINVAL); + } + user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR); + atomic_add_int(&inp->total_sends, 1); + if (uio) { +#if defined(__APPLE__) +#if defined(APPLE_LEOPARD) + if (uio->uio_resid < 0) { +#else + if (uio_resid(uio) < 0) { +#endif +#else + if (uio->uio_resid < 0) { +#endif + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + return (EINVAL); + } +#if defined(__APPLE__) +#if defined(APPLE_LEOPARD) + sndlen = uio->uio_resid; +#else + sndlen = uio_resid(uio); +#endif +#else + sndlen = uio->uio_resid; +#endif + } else { + top = SCTP_HEADER_TO_CHAIN(i_pak); +#ifdef __Panda__ + /*- + * app len indicates the datalen, dgsize for cases + * of SCTP_EOF/ABORT will not have the right len + */ + sndlen = SCTP_APP_DATA_LEN(i_pak); + /*- + * Set the particle len also to zero to match + * up with app len. We only have one particle + * if app len is zero for Panda. This is ensured + * in the socket lib + */ + if (sndlen == 0) { + SCTP_BUF_LEN(top) = 0; + } + /*- + * We delink the chain from header, but keep + * the header around as we will need it in + * EAGAIN case + */ + SCTP_DETACH_HEADER_FROM_CHAIN(i_pak); +#else + sndlen = SCTP_HEADER_LEN(i_pak); +#endif + } + SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n", + (void *)addr, + sndlen); +#ifdef __Panda__ + if (i_control) { + control = SCTP_HEADER_TO_CHAIN(i_control); + } +#endif + if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && + (inp->sctp_socket->so_qlimit)) { + /* The listener can NOT send */ + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN); + error = ENOTCONN; + goto out_unlocked; + } + /** + * Pre-screen address, if one is given the sin-len + * must be set correctly! + */ + if (addr) { + union sctp_sockstore *raddr = (union sctp_sockstore *)addr; + switch (raddr->sa.sa_family) { +#ifdef INET + case AF_INET: +#ifdef HAVE_SIN_LEN + if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) { + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + error = EINVAL; + goto out_unlocked; + } +#endif + port = raddr->sin.sin_port; + break; +#endif +#ifdef INET6 + case AF_INET6: +#ifdef HAVE_SIN6_LEN + if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) { + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + error = EINVAL; + goto out_unlocked; + } +#endif + port = raddr->sin6.sin6_port; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: +#ifdef HAVE_SCONN_LEN + if (raddr->sconn.sconn_len != sizeof(struct sockaddr_conn)) { + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + error = EINVAL; + goto out_unlocked; + } +#endif + port = raddr->sconn.sconn_port; + break; +#endif + default: + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT); + error = EAFNOSUPPORT; + goto out_unlocked; + } + } else + port = 0; + + if (srcv) { + sinfo_flags = srcv->sinfo_flags; + sinfo_assoc_id = srcv->sinfo_assoc_id; + if (INVALID_SINFO_FLAG(sinfo_flags) || + PR_SCTP_INVALID_POLICY(sinfo_flags)) { + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + error = EINVAL; + goto out_unlocked; + } + if (srcv->sinfo_flags) + SCTP_STAT_INCR(sctps_sends_with_flags); + } else { + sinfo_flags = inp->def_send.sinfo_flags; + sinfo_assoc_id = inp->def_send.sinfo_assoc_id; + } + if (sinfo_flags & SCTP_SENDALL) { + /* its a sendall */ + error = sctp_sendall(inp, uio, top, srcv); + top = NULL; + goto out_unlocked; + } + if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) { + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + error = EINVAL; + goto out_unlocked; + } + /* now we must find the assoc */ + if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) || + (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { + SCTP_INP_RLOCK(inp); + stcb = LIST_FIRST(&inp->sctp_asoc_list); + if (stcb) { + SCTP_TCB_LOCK(stcb); + hold_tcblock = 1; + } + SCTP_INP_RUNLOCK(inp); + } else if (sinfo_assoc_id) { + stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0); + } else if (addr) { + /*- + * Since we did not use findep we must + * increment it, and if we don't find a tcb + * decrement it. + */ + SCTP_INP_WLOCK(inp); + SCTP_INP_INCR_REF(inp); + SCTP_INP_WUNLOCK(inp); + stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL); + if (stcb == NULL) { + SCTP_INP_WLOCK(inp); + SCTP_INP_DECR_REF(inp); + SCTP_INP_WUNLOCK(inp); + } else { + hold_tcblock = 1; + } + } + if ((stcb == NULL) && (addr)) { + /* Possible implicit send? */ + SCTP_ASOC_CREATE_LOCK(inp); + create_lock_applied = 1; + if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) || + (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { + /* Should I really unlock ? */ + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); + error = EINVAL; + goto out_unlocked; + + } + if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) && + (addr->sa_family == AF_INET6)) { + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + error = EINVAL; + goto out_unlocked; + } + SCTP_INP_WLOCK(inp); + SCTP_INP_INCR_REF(inp); + SCTP_INP_WUNLOCK(inp); + /* With the lock applied look again */ + stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL); + if ((stcb == NULL) && (control != NULL) && (port > 0)) { + stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error); + } + if (stcb == NULL) { + SCTP_INP_WLOCK(inp); + SCTP_INP_DECR_REF(inp); + SCTP_INP_WUNLOCK(inp); + } else { + hold_tcblock = 1; + } + if (error) { + goto out_unlocked; + } + if (t_inp != inp) { + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN); + error = ENOTCONN; + goto out_unlocked; + } + } + if (stcb == NULL) { + if (addr == NULL) { + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT); + error = ENOENT; + goto out_unlocked; + } else { + /* We must go ahead and start the INIT process */ + uint32_t vrf_id; + + if ((sinfo_flags & SCTP_ABORT) || + ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) { + /*- + * User asks to abort a non-existant assoc, + * or EOF a non-existant assoc with no data + */ + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT); + error = ENOENT; + goto out_unlocked; + } + /* get an asoc/stcb struct */ + vrf_id = inp->def_vrf_id; +#ifdef INVARIANTS + if (create_lock_applied == 0) { + panic("Error, should hold create lock and I don't?"); + } +#endif + stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, +#if !(defined( __Panda__) || defined(__Userspace__)) + p +#else + (struct proc *)NULL +#endif + ); + if (stcb == NULL) { + /* Error is setup for us in the call */ + goto out_unlocked; + } + if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { + stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; + /* Set the connected flag so we can queue data */ + soisconnecting(so); + } + hold_tcblock = 1; + if (create_lock_applied) { + SCTP_ASOC_CREATE_UNLOCK(inp); + create_lock_applied = 0; + } else { + SCTP_PRINTF("Huh-3? create lock should have been on??\n"); + } + /* Turn on queue only flag to prevent data from being sent */ + queue_only = 1; + asoc = &stcb->asoc; + SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT); + (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered); + + /* initialize authentication params for the assoc */ + sctp_initialize_auth_params(inp, stcb); + + if (control) { + if (sctp_process_cmsgs_for_init(stcb, control, &error)) { + sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_7); + hold_tcblock = 0; + stcb = NULL; + goto out_unlocked; + } + } + /* out with the INIT */ + queue_only_for_init = 1; + /*- + * we may want to dig in after this call and adjust the MTU + * value. It defaulted to 1500 (constant) but the ro + * structure may now have an update and thus we may need to + * change it BEFORE we append the message. + */ + } + } else + asoc = &stcb->asoc; + if (srcv == NULL) + srcv = (struct sctp_sndrcvinfo *)&asoc->def_send; + if (srcv->sinfo_flags & SCTP_ADDR_OVER) { + if (addr) + net = sctp_findnet(stcb, addr); + else + net = NULL; + if ((net == NULL) || + ((port != 0) && (port != stcb->rport))) { + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + error = EINVAL; + goto out_unlocked; + } + } else { + if (stcb->asoc.alternate) { + net = stcb->asoc.alternate; + } else { + net = stcb->asoc.primary_destination; + } + } + atomic_add_int(&stcb->total_sends, 1); + /* Keep the stcb from being freed under our feet */ + atomic_add_int(&asoc->refcnt, 1); + free_cnt_applied = 1; + + if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) { + if (sndlen > asoc->smallest_mtu) { + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); + error = EMSGSIZE; + goto out_unlocked; + } + } +#if defined(__Userspace__) + if (inp->recv_callback) { + non_blocking = 1; + } +#endif + if (SCTP_SO_IS_NBIO(so) +#if defined(__FreeBSD__) && __FreeBSD_version >= 500000 + || (flags & MSG_NBIO) +#endif + ) { + non_blocking = 1; + } + /* would we block? */ + if (non_blocking) { + if (hold_tcblock == 0) { + SCTP_TCB_LOCK(stcb); + hold_tcblock = 1; + } + inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); + if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) || + (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK); + if (sndlen > SCTP_SB_LIMIT_SND(so)) + error = EMSGSIZE; + else + error = EWOULDBLOCK; + goto out_unlocked; + } + stcb->asoc.sb_send_resv += sndlen; + SCTP_TCB_UNLOCK(stcb); + hold_tcblock = 0; + } else { + atomic_add_int(&stcb->asoc.sb_send_resv, sndlen); + } + local_soresv = sndlen; + if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); + error = ECONNRESET; + goto out_unlocked; + } + if (create_lock_applied) { + SCTP_ASOC_CREATE_UNLOCK(inp); + create_lock_applied = 0; + } + if (asoc->stream_reset_outstanding) { + /* + * Can't queue any data while stream reset is underway. + */ + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN); + error = EAGAIN; + goto out_unlocked; + } + if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || + (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { + queue_only = 1; + } + /* we are now done with all control */ + if (control) { + sctp_m_freem(control); + control = NULL; + } + if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) || + (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || + (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || + (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) { + if (srcv->sinfo_flags & SCTP_ABORT) { + ; + } else { + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); + error = ECONNRESET; + goto out_unlocked; + } + } + /* Ok, we will attempt a msgsnd :> */ +#if !(defined(__Panda__) || defined(__Windows__) || defined(__Userspace__)) + if (p) { +#if defined(__FreeBSD__) && __FreeBSD_version >= 603000 + p->td_ru.ru_msgsnd++; +#elif defined(__FreeBSD__) && __FreeBSD_version >= 500000 + p->td_proc->p_stats->p_ru.ru_msgsnd++; +#else + p->p_stats->p_ru.ru_msgsnd++; +#endif + } +#endif + /* Are we aborting? */ + if (srcv->sinfo_flags & SCTP_ABORT) { + struct mbuf *mm; + int tot_demand, tot_out = 0, max_out; + + SCTP_STAT_INCR(sctps_sends_with_abort); + if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || + (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { + /* It has to be up before we abort */ + /* how big is the user initiated abort? */ + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + error = EINVAL; + goto out; + } + if (hold_tcblock) { + SCTP_TCB_UNLOCK(stcb); + hold_tcblock = 0; + } + if (top) { + struct mbuf *cntm = NULL; + + mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA); + if (sndlen != 0) { + for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) { + tot_out += SCTP_BUF_LEN(cntm); + } + } + } else { + /* Must fit in a MTU */ + tot_out = sndlen; + tot_demand = (tot_out + sizeof(struct sctp_paramhdr)); + if (tot_demand > SCTP_DEFAULT_ADD_MORE) { + /* To big */ + SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); + error = EMSGSIZE; + goto out; + } + mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA); + } + if (mm == NULL) { + SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM); + error = ENOMEM; + goto out; + } + max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr); + max_out -= sizeof(struct sctp_abort_msg); + if (tot_out > max_out) { + tot_out = max_out; + } + if (mm) { + struct sctp_paramhdr *ph; + + /* now move forward the data pointer */ + ph = mtod(mm, struct sctp_paramhdr *); + ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); + ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out); + ph++; + SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr); + if (top == NULL) { +#if defined(__APPLE__) + SCTP_SOCKET_UNLOCK(so, 0); +#endif + error = uiomove((caddr_t)ph, (int)tot_out, uio); +#if defined(__APPLE__) + SCTP_SOCKET_LOCK(so, 0); +#endif + if (error) { + /*- + * Here if we can't get his data we + * still abort we just don't get to + * send the users note :-0 + */ + sctp_m_freem(mm); + mm = NULL; + } + } else { + if (sndlen != 0) { + SCTP_BUF_NEXT(mm) = top; + } + } + } + if (hold_tcblock == 0) { + SCTP_TCB_LOCK(stcb); + } + atomic_add_int(&stcb->asoc.refcnt, -1); + free_cnt_applied = 0; + /* release this lock, otherwise we hang on ourselves */ + sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED); + /* now relock the stcb so everything is sane */ + hold_tcblock = 0; + stcb = NULL; + /* In this case top is already chained to mm + * avoid double free, since we free it below if + * top != NULL and driver would free it after sending + * the packet out + */ + if (sndlen != 0) { + top = NULL; + } + goto out_unlocked; + } + /* Calculate the maximum we can send */ + inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); + if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) { + if (non_blocking) { + /* we already checked for non-blocking above. */ + max_len = sndlen; + } else { + max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; + } + } else { + max_len = 0; + } + if (hold_tcblock) { + SCTP_TCB_UNLOCK(stcb); + hold_tcblock = 0; + } + /* Is the stream no. valid? */ + if (srcv->sinfo_stream >= asoc->streamoutcnt) { + /* Invalid stream number */ + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + error = EINVAL; + goto out_unlocked; + } + if (asoc->strmout == NULL) { + /* huh? software error */ + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); + error = EFAULT; + goto out_unlocked; + } + + /* Unless E_EOR mode is on, we must make a send FIT in one call. */ + if ((user_marks_eor == 0) && + (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) { + /* It will NEVER fit */ + SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); + error = EMSGSIZE; + goto out_unlocked; + } + if ((uio == NULL) && user_marks_eor) { + /*- + * We do not support eeor mode for + * sending with mbuf chains (like sendfile). + */ + SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + error = EINVAL; + goto out_unlocked; + } + + if (user_marks_eor) { + local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold)); + } else { + /*- + * For non-eeor the whole message must fit in + * the socket send buffer. + */ + local_add_more = sndlen; + } + len = 0; + if (non_blocking) { + goto skip_preblock; + } + if (((max_len <= local_add_more) && + (SCTP_SB_LIMIT_SND(so) >= local_add_more)) || + (max_len == 0) || + ((stcb->asoc.chunks_on_out_queue+stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { + /* No room right now ! */ + SOCKBUF_LOCK(&so->so_snd); + inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); + while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) || + ((stcb->asoc.stream_queue_cnt+stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { + SCTPDBG(SCTP_DEBUG_OUTPUT1,"pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n", + (unsigned int)SCTP_SB_LIMIT_SND(so), + inqueue_bytes, + local_add_more, + stcb->asoc.stream_queue_cnt, + stcb->asoc.chunks_on_out_queue, + SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue)); + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { + sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen); + } + be.error = 0; +#if !defined(__Panda__) && !defined(__Windows__) + stcb->block_entry = &be; +#endif + error = sbwait(&so->so_snd); + stcb->block_entry = NULL; + if (error || so->so_error || be.error) { + if (error == 0) { + if (so->so_error) + error = so->so_error; + if (be.error) { + error = be.error; + } + } + SOCKBUF_UNLOCK(&so->so_snd); + goto out_unlocked; + } + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { + sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK, + asoc, stcb->asoc.total_output_queue_size); + } + if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { + goto out_unlocked; + } + inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); + } + if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) { + max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; + } else { + max_len = 0; + } + SOCKBUF_UNLOCK(&so->so_snd); + } + +skip_preblock: + if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { + goto out_unlocked; + } +#if defined(__APPLE__) + error = sblock(&so->so_snd, SBLOCKWAIT(flags)); +#endif + /* sndlen covers for mbuf case + * uio_resid covers for the non-mbuf case + * NOTE: uio will be null when top/mbuf is passed + */ + if (sndlen == 0) { + if (srcv->sinfo_flags & SCTP_EOF) { + got_all_of_the_send = 1; + goto dataless_eof; + } else { + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + error = EINVAL; + goto out; + } + } + if (top == NULL) { + struct sctp_stream_queue_pending *sp; + struct sctp_stream_out *strm; + uint32_t sndout; + + SCTP_TCB_SEND_LOCK(stcb); + if ((asoc->stream_locked) && + (asoc->stream_locked_on != srcv->sinfo_stream)) { + SCTP_TCB_SEND_UNLOCK(stcb); + SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); + error = EINVAL; + goto out; + } + SCTP_TCB_SEND_UNLOCK(stcb); + + strm = &stcb->asoc.strmout[srcv->sinfo_stream]; + if (strm->last_msg_incomplete == 0) { + do_a_copy_in: + sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error); + if ((sp == NULL) || (error)) { + goto out; + } + SCTP_TCB_SEND_LOCK(stcb); + if (sp->msg_is_complete) { + strm->last_msg_incomplete = 0; + asoc->stream_locked = 0; + } else { + /* Just got locked to this guy in + * case of an interrupt. + */ + strm->last_msg_incomplete = 1; + asoc->stream_locked = 1; + asoc->stream_locked_on = srcv->sinfo_stream; + sp->sender_all_done = 0; + } + sctp_snd_sb_alloc(stcb, sp->length); + atomic_add_int(&asoc->stream_queue_cnt, 1); + if (srcv->sinfo_flags & SCTP_UNORDERED) { + SCTP_STAT_INCR(sctps_sends_with_unord); + } + TAILQ_INSERT_TAIL(&strm->outqueue, sp, next); + stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1); + SCTP_TCB_SEND_UNLOCK(stcb); + } else { + SCTP_TCB_SEND_LOCK(stcb); + sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead); + SCTP_TCB_SEND_UNLOCK(stcb); + if (sp == NULL) { + /* ???? Huh ??? last msg is gone */ +#ifdef INVARIANTS + panic("Warning: Last msg marked incomplete, yet nothing left?"); +#else + SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n"); + strm->last_msg_incomplete = 0; +#endif + goto do_a_copy_in; + + } + } +#if defined(__APPLE__) +#if defined(APPLE_LEOPARD) + while (uio->uio_resid > 0) { +#else + while (uio_resid(uio) > 0) { +#endif +#else + while (uio->uio_resid > 0) { +#endif + /* How much room do we have? */ + struct mbuf *new_tail, *mm; + + if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size) + max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size; + else + max_len = 0; + + if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) || + (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) || +#if defined(__APPLE__) +#if defined(APPLE_LEOPARD) + (uio->uio_resid && (uio->uio_resid <= (int)max_len))) { +#else + (uio_resid(uio) && (uio_resid(uio) <= (int)max_len))) { +#endif +#else + (uio->uio_resid && (uio->uio_resid <= (int)max_len))) { +#endif + sndout = 0; + new_tail = NULL; + if (hold_tcblock) { + SCTP_TCB_UNLOCK(stcb); + hold_tcblock = 0; + } +#if defined(__APPLE__) + SCTP_SOCKET_UNLOCK(so, 0); +#endif +#if defined(__FreeBSD__) && __FreeBSD_version > 602000 + mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail); +#else + mm = sctp_copy_resume(uio, max_len, &error, &sndout, &new_tail); +#endif +#if defined(__APPLE__) + SCTP_SOCKET_LOCK(so, 0); +#endif + if ((mm == NULL) || error) { + if (mm) { + sctp_m_freem(mm); + } + goto out; + } + /* Update the mbuf and count */ + SCTP_TCB_SEND_LOCK(stcb); + if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { + /* we need to get out. + * Peer probably aborted. + */ + sctp_m_freem(mm); + if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) { + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); + error = ECONNRESET; + } + SCTP_TCB_SEND_UNLOCK(stcb); + goto out; + } + if (sp->tail_mbuf) { + /* tack it to the end */ + SCTP_BUF_NEXT(sp->tail_mbuf) = mm; + sp->tail_mbuf = new_tail; + } else { + /* A stolen mbuf */ + sp->data = mm; + sp->tail_mbuf = new_tail; + } + sctp_snd_sb_alloc(stcb, sndout); + atomic_add_int(&sp->length,sndout); + len += sndout; + + /* Did we reach EOR? */ +#if defined(__APPLE__) +#if defined(APPLE_LEOPARD) + if ((uio->uio_resid == 0) && +#else + if ((uio_resid(uio) == 0) && +#endif +#else + if ((uio->uio_resid == 0) && +#endif + ((user_marks_eor == 0) || + (srcv->sinfo_flags & SCTP_EOF) || + (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) { + sp->msg_is_complete = 1; + } else { + sp->msg_is_complete = 0; + } + SCTP_TCB_SEND_UNLOCK(stcb); + } +#if defined(__APPLE__) +#if defined(APPLE_LEOPARD) + if (uio->uio_resid == 0) { +#else + if (uio_resid(uio) == 0) { +#endif +#else + if (uio->uio_resid == 0) { +#endif + /* got it all? */ + continue; + } + /* PR-SCTP? */ + if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) { + /* This is ugly but we must assure locking order */ + if (hold_tcblock == 0) { + SCTP_TCB_LOCK(stcb); + hold_tcblock = 1; + } + sctp_prune_prsctp(stcb, asoc, srcv, sndlen); + inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); + if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size) + max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; + else + max_len = 0; + if (max_len > 0) { + continue; + } + SCTP_TCB_UNLOCK(stcb); + hold_tcblock = 0; + } + /* wait for space now */ + if (non_blocking) { + /* Non-blocking io in place out */ + goto skip_out_eof; + } + /* What about the INIT, send it maybe */ + if (queue_only_for_init) { + if (hold_tcblock == 0) { + SCTP_TCB_LOCK(stcb); + hold_tcblock = 1; + } + if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { + /* a collision took us forward? */ + queue_only = 0; + } else { + sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); + SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT); + queue_only = 1; + } + } + if ((net->flight_size > net->cwnd) && + (asoc->sctp_cmt_on_off == 0)) { + SCTP_STAT_INCR(sctps_send_cwnd_avoid); + queue_only = 1; + } else if (asoc->ifp_had_enobuf) { + SCTP_STAT_INCR(sctps_ifnomemqueued); + if (net->flight_size > (2 * net->mtu)) { + queue_only = 1; + } + asoc->ifp_had_enobuf = 0; + } + un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + + (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); + if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && + (stcb->asoc.total_flight > 0) && + (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) && + (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) { + + /*- + * Ok, Nagle is set on and we have data outstanding. + * Don't send anything and let SACKs drive out the + * data unless wen have a "full" segment to send. + */ + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { + sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED); + } + SCTP_STAT_INCR(sctps_naglequeued); + nagle_applies = 1; + } else { + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { + if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) + sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED); + } + SCTP_STAT_INCR(sctps_naglesent); + nagle_applies = 0; + } + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { + + sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only, + nagle_applies, un_sent); + sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size, + stcb->asoc.total_flight, + stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count); + } + if (queue_only_for_init) + queue_only_for_init = 0; + if ((queue_only == 0) && (nagle_applies == 0)) { + /*- + * need to start chunk output + * before blocking.. note that if + * a lock is already applied, then + * the input via the net is happening + * and I don't need to start output :-D + */ + if (hold_tcblock == 0) { + if (SCTP_TCB_TRYLOCK(stcb)) { + hold_tcblock = 1; + sctp_chunk_output(inp, + stcb, + SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); + } + } else { + sctp_chunk_output(inp, + stcb, + SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); + } + if (hold_tcblock == 1) { + SCTP_TCB_UNLOCK(stcb); + hold_tcblock = 0; + } + } + SOCKBUF_LOCK(&so->so_snd); + /*- + * This is a bit strange, but I think it will + * work. The total_output_queue_size is locked and + * protected by the TCB_LOCK, which we just released. + * There is a race that can occur between releasing it + * above, and me getting the socket lock, where sacks + * come in but we have not put the SB_WAIT on the + * so_snd buffer to get the wakeup. After the LOCK + * is applied the sack_processing will also need to + * LOCK the so->so_snd to do the actual sowwakeup(). So + * once we have the socket buffer lock if we recheck the + * size we KNOW we will get to sleep safely with the + * wakeup flag in place. + */ + if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size + + min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) { + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { +#if defined(__APPLE__) +#if defined(APPLE_LEOPARD) + sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK, + asoc, uio->uio_resid); +#else + sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK, + asoc, uio_resid(uio)); +#endif +#else + sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK, + asoc, uio->uio_resid); +#endif + } + be.error = 0; +#if !defined(__Panda__) && !defined(__Windows__) + stcb->block_entry = &be; +#endif +#if defined(__APPLE__) + sbunlock(&so->so_snd, 1); +#endif + error = sbwait(&so->so_snd); + stcb->block_entry = NULL; + + if (error || so->so_error || be.error) { + if (error == 0) { + if (so->so_error) + error = so->so_error; + if (be.error) { + error = be.error; + } + } + SOCKBUF_UNLOCK(&so->so_snd); + goto out_unlocked; + } + +#if defined(__APPLE__) + error = sblock(&so->so_snd, SBLOCKWAIT(flags)); +#endif + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { + sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK, + asoc, stcb->asoc.total_output_queue_size); + } + } + SOCKBUF_UNLOCK(&so->so_snd); + if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { + goto out_unlocked; + } + } + SCTP_TCB_SEND_LOCK(stcb); + if (sp) { + if (sp->msg_is_complete == 0) { + strm->last_msg_incomplete = 1; + asoc->stream_locked = 1; + asoc->stream_locked_on = srcv->sinfo_stream; + } else { + sp->sender_all_done = 1; + strm->last_msg_incomplete = 0; + asoc->stream_locked = 0; + } + } else { + SCTP_PRINTF("Huh no sp TSNH?\n"); + strm->last_msg_incomplete = 0; + asoc->stream_locked = 0; + } + SCTP_TCB_SEND_UNLOCK(stcb); +#if defined(__APPLE__) +#if defined(APPLE_LEOPARD) + if (uio->uio_resid == 0) { +#else + if (uio_resid(uio) == 0) { +#endif +#else + if (uio->uio_resid == 0) { +#endif + got_all_of_the_send = 1; + } + } else { + /* We send in a 0, since we do NOT have any locks */ + error = sctp_msg_append(stcb, net, top, srcv, 0); + top = NULL; + if (srcv->sinfo_flags & SCTP_EOF) { + /* + * This should only happen for Panda for the mbuf + * send case, which does NOT yet support EEOR mode. + * Thus, we can just set this flag to do the proper + * EOF handling. + */ + got_all_of_the_send = 1; + } + } + if (error) { + goto out; + } +dataless_eof: + /* EOF thing ? */ + if ((srcv->sinfo_flags & SCTP_EOF) && + (got_all_of_the_send == 1)) { + int cnt; + SCTP_STAT_INCR(sctps_sends_with_eof); + error = 0; + if (hold_tcblock == 0) { + SCTP_TCB_LOCK(stcb); + hold_tcblock = 1; + } + cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED); + if (TAILQ_EMPTY(&asoc->send_queue) && + TAILQ_EMPTY(&asoc->sent_queue) && + (cnt == 0)) { + if (asoc->locked_on_sending) { + goto abort_anyway; + } + /* there is nothing queued to send, so I'm done... */ + if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && + (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && + (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { + struct sctp_nets *netp; + + /* only send SHUTDOWN the first time through */ + if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { + SCTP_STAT_DECR_GAUGE32(sctps_currestab); + } + SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); + SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); + sctp_stop_timers_for_shutdown(stcb); + if (stcb->asoc.alternate) { + netp = stcb->asoc.alternate; + } else { + netp = stcb->asoc.primary_destination; + } + sctp_send_shutdown(stcb, netp); + sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, + netp); + sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, + asoc->primary_destination); + } + } else { + /*- + * we still got (or just got) data to send, so set + * SHUTDOWN_PENDING + */ + /*- + * XXX sockets draft says that SCTP_EOF should be + * sent with no data. currently, we will allow user + * data to be sent first and move to + * SHUTDOWN-PENDING + */ + if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && + (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && + (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { + if (hold_tcblock == 0) { + SCTP_TCB_LOCK(stcb); + hold_tcblock = 1; + } + if (asoc->locked_on_sending) { + /* Locked to send out the data */ + struct sctp_stream_queue_pending *sp; + sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead); + if (sp) { + if ((sp->length == 0) && (sp->msg_is_complete == 0)) + asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT; + } + } + asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; + if (TAILQ_EMPTY(&asoc->send_queue) && + TAILQ_EMPTY(&asoc->sent_queue) && + (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) { + abort_anyway: + if (free_cnt_applied) { + atomic_add_int(&stcb->asoc.refcnt, -1); + free_cnt_applied = 0; + } + sctp_abort_an_association(stcb->sctp_ep, stcb, + NULL, SCTP_SO_LOCKED); + /* now relock the stcb so everything is sane */ + hold_tcblock = 0; + stcb = NULL; + goto out; + } + sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, + asoc->primary_destination); + sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY); + } + } + } +skip_out_eof: + if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) { + some_on_control = 1; + } + if (queue_only_for_init) { + if (hold_tcblock == 0) { + SCTP_TCB_LOCK(stcb); + hold_tcblock = 1; + } + if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { + /* a collision took us forward? */ + queue_only = 0; + } else { + sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); + SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT); + queue_only = 1; + } + } + if ((net->flight_size > net->cwnd) && + (stcb->asoc.sctp_cmt_on_off == 0)) { + SCTP_STAT_INCR(sctps_send_cwnd_avoid); + queue_only = 1; + } else if (asoc->ifp_had_enobuf) { + SCTP_STAT_INCR(sctps_ifnomemqueued); + if (net->flight_size > (2 * net->mtu)) { + queue_only = 1; + } + asoc->ifp_had_enobuf = 0; + } + un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + + (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); + if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && + (stcb->asoc.total_flight > 0) && + (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) && + (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) { + /*- + * Ok, Nagle is set on and we have data outstanding. + * Don't send anything and let SACKs drive out the + * data unless wen have a "full" segment to send. + */ + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { + sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED); + } + SCTP_STAT_INCR(sctps_naglequeued); + nagle_applies = 1; + } else { + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { + if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) + sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED); + } + SCTP_STAT_INCR(sctps_naglesent); + nagle_applies = 0; + } + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { + sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only, + nagle_applies, un_sent); + sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size, + stcb->asoc.total_flight, + stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count); + } + if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) { + /* we can attempt to send too. */ + if (hold_tcblock == 0) { + /* If there is activity recv'ing sacks no need to send */ + if (SCTP_TCB_TRYLOCK(stcb)) { + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); + hold_tcblock = 1; + } + } else { + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); + } + } else if ((queue_only == 0) && + (stcb->asoc.peers_rwnd == 0) && + (stcb->asoc.total_flight == 0)) { + /* We get to have a probe outstanding */ + if (hold_tcblock == 0) { + hold_tcblock = 1; + SCTP_TCB_LOCK(stcb); + } + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); + } else if (some_on_control) { + int num_out, reason, frag_point; + + /* Here we do control only */ + if (hold_tcblock == 0) { + hold_tcblock = 1; + SCTP_TCB_LOCK(stcb); + } + frag_point = sctp_get_frag_point(stcb, &stcb->asoc); + (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out, + &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED); + } + SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n", + queue_only, stcb->asoc.peers_rwnd, un_sent, + stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue, + stcb->asoc.total_output_queue_size, error); + +out: +#if defined(__APPLE__) + sbunlock(&so->so_snd, 1); +#endif +out_unlocked: + + if (local_soresv && stcb) { + atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen); + } + if (create_lock_applied) { + SCTP_ASOC_CREATE_UNLOCK(inp); + } + if ((stcb) && hold_tcblock) { + SCTP_TCB_UNLOCK(stcb); + } + if (stcb && free_cnt_applied) { + atomic_add_int(&stcb->asoc.refcnt, -1); + } +#ifdef INVARIANTS +#if !defined(__APPLE__) + if (stcb) { + if (mtx_owned(&stcb->tcb_mtx)) { + panic("Leaving with tcb mtx owned?"); + } + if (mtx_owned(&stcb->tcb_send_mtx)) { + panic("Leaving with tcb send mtx owned?"); + } + } +#endif +#endif +#ifdef __Panda__ + /* + * Handle the EAGAIN/ENOMEM cases to reattach the pak header + * to particle when pak is passed in, so that caller + * can try again with this pak + * + * NOTE: For other cases, including success case, + * we simply want to return the header back to free + * pool + */ + if (top) { + if ((error == EAGAIN) || (error == ENOMEM)) { + SCTP_ATTACH_CHAIN(i_pak, top, sndlen); + top = NULL; + } else { + (void)SCTP_RELEASE_HEADER(i_pak); + } + } else { + /* This is to handle cases when top has + * been reset to NULL but pak might not + * be freed + */ + if (i_pak) { + (void)SCTP_RELEASE_HEADER(i_pak); + } + } +#endif +#ifdef INVARIANTS + if (inp) { + sctp_validate_no_locks(inp); + } else { + SCTP_PRINTF("Warning - inp is NULL so cant validate locks\n"); + } +#endif + if (top) { + sctp_m_freem(top); + } + if (control) { + sctp_m_freem(control); + } + return (error); +} + + +/* + * generate an AUTHentication chunk, if required + */ +struct mbuf * +sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end, + struct sctp_auth_chunk **auth_ret, uint32_t * offset, + struct sctp_tcb *stcb, uint8_t chunk) +{ + struct mbuf *m_auth; + struct sctp_auth_chunk *auth; + int chunk_len; + struct mbuf *cn; + + if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) || + (stcb == NULL)) + return (m); + + if (stcb->asoc.auth_supported == 0) { + return (m); + } + /* does the requested chunk require auth? */ + if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) { + return (m); + } + m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER); + if (m_auth == NULL) { + /* no mbuf's */ + return (m); + } + /* reserve some space if this will be the first mbuf */ + if (m == NULL) + SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD); + /* fill in the AUTH chunk details */ + auth = mtod(m_auth, struct sctp_auth_chunk *); + bzero(auth, sizeof(*auth)); + auth->ch.chunk_type = SCTP_AUTHENTICATION; + auth->ch.chunk_flags = 0; + chunk_len = sizeof(*auth) + + sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id); + auth->ch.chunk_length = htons(chunk_len); + auth->hmac_id = htons(stcb->asoc.peer_hmac_id); + /* key id and hmac digest will be computed and filled in upon send */ + + /* save the offset where the auth was inserted into the chain */ + *offset = 0; + for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) { + *offset += SCTP_BUF_LEN(cn); + } + + /* update length and return pointer to the auth chunk */ + SCTP_BUF_LEN(m_auth) = chunk_len; + m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0); + if (auth_ret != NULL) + *auth_ret = auth; + + return (m); +} + +#if defined(__FreeBSD__) || defined(__APPLE__) +#ifdef INET6 +int +sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t *ro) +{ + struct nd_prefix *pfx = NULL; + struct nd_pfxrouter *pfxrtr = NULL; + struct sockaddr_in6 gw6; + + if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6) + return (0); + + /* get prefix entry of address */ + LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) { + if (pfx->ndpr_stateflags & NDPRF_DETACHED) + continue; + if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr, + &src6->sin6_addr, &pfx->ndpr_mask)) + break; + } + /* no prefix entry in the prefix list */ + if (pfx == NULL) { + SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for "); + SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6); + return (0); + } + + SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is "); + SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6); + + /* search installed gateway from prefix entry */ + LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) { + memset(&gw6, 0, sizeof(struct sockaddr_in6)); + gw6.sin6_family = AF_INET6; +#ifdef HAVE_SIN6_LEN + gw6.sin6_len = sizeof(struct sockaddr_in6); +#endif + memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr, + sizeof(struct in6_addr)); + SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is "); + SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6); + SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is "); + SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway); + if (sctp_cmpaddr((struct sockaddr *)&gw6, + ro->ro_rt->rt_gateway)) { + SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n"); + return (1); + } + } + SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n"); + return (0); +} +#endif + +int +sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t *ro) +{ +#ifdef INET + struct sockaddr_in *sin, *mask; + struct ifaddr *ifa; + struct in_addr srcnetaddr, gwnetaddr; + + if (ro == NULL || ro->ro_rt == NULL || + sifa->address.sa.sa_family != AF_INET) { + return (0); + } + ifa = (struct ifaddr *)sifa->ifa; + mask = (struct sockaddr_in *)(ifa->ifa_netmask); + sin = &sifa->address.sin; + srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr); + SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is "); + SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa); + SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr); + + sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway; + gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr); + SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is "); + SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway); + SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr); + if (srcnetaddr.s_addr == gwnetaddr.s_addr) { + return (1); + } +#endif + return (0); +} +#elif defined(__Userspace__) +/* TODO __Userspace__ versions of sctp_vXsrc_match_nexthop(). */ +int +sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t *ro) +{ + return (0); +} +int +sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t *ro) +{ + return (0); +} + +#endif |