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Diffstat (limited to 'ldap/c-sdk/libraries/liblber/io.c')
| -rw-r--r-- | ldap/c-sdk/libraries/liblber/io.c | 1757 |
1 files changed, 1757 insertions, 0 deletions
diff --git a/ldap/c-sdk/libraries/liblber/io.c b/ldap/c-sdk/libraries/liblber/io.c new file mode 100644 index 000000000..fc81a9dee --- /dev/null +++ b/ldap/c-sdk/libraries/liblber/io.c @@ -0,0 +1,1757 @@ +/* ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0/LGPL 2.1 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is Mozilla Communicator client code, released + * March 31, 1998. + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 1998-1999 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * + * Alternatively, the contents of this file may be used under the terms of + * either of the GNU General Public License Version 2 or later (the "GPL"), + * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), + * in which case the provisions of the GPL or the LGPL are applicable instead + * of those above. If you wish to allow use of your version of this file only + * under the terms of either the GPL or the LGPL, and not to allow others to + * use your version of this file under the terms of the MPL, indicate your + * decision by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL or the LGPL. If you do not delete + * the provisions above, a recipient may use your version of this file under + * the terms of any one of the MPL, the GPL or the LGPL. + * + * ***** END LICENSE BLOCK ***** */ + +/* + * Copyright (c) 1990 Regents of the University of Michigan. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that this notice is preserved and that due credit is given + * to the University of Michigan at Ann Arbor. The name of the University + * may not be used to endorse or promote products derived from this + * software without specific prior written permission. This software + * is provided ``as is'' without express or implied warranty. + */ +/* io.c - ber general i/o routines */ + +#include "lber-int.h" + +#define bergetc( sb, len ) ( sb->sb_ber.ber_end > sb->sb_ber.ber_ptr ? \ + (unsigned char)*sb->sb_ber.ber_ptr++ : \ + ber_filbuf( sb, len )) + +# ifdef macintosh +/* + * MacTCP/OpenTransport + */ +# define read( s, b, l ) tcpread( s, 0, (unsigned char *)b, l, NULL ) +# define MAX_WRITE 65535 +# define BerWrite( sb, b, l ) tcpwrite( sb->sb_sd, (unsigned char *)(b), (l<MAX_WRITE)? l : MAX_WRITE ) +# else /* macintosh */ +# if defined(_WIN32) || defined(_WINDOWS) || defined(XP_OS2) +/* + * 32-bit Windows Socket API (under Windows NT or Windows 95) + */ +# define read( s, b, l ) recv( s, b, l, 0 ) +# define BerWrite( s, b, l ) send( s->sb_sd, b, l, 0 ) +# else /* _WIN32 */ +/* + * everything else (Unix/BSD 4.3 socket API) + */ +# define BerWrite( sb, b, l ) write( sb->sb_sd, b, l ) +# define udp_read( sb, b, l, al ) recvfrom(sb->sb_sd, (char *)b, l, 0, \ + (struct sockaddr *)sb->sb_fromaddr, \ + (al = sizeof(struct sockaddr), &al)) +# define udp_write( sb, b, l ) sendto(sb->sb_sd, (char *)(b), l, 0, \ + (struct sockaddr *)sb->sb_useaddr, sizeof(struct sockaddr)) +# endif /* _WIN32 */ +# endif /* macintosh */ + +#ifndef udp_read +#define udp_read( sb, b, l, al ) CLDAP NOT SUPPORTED +#define udp_write( sb, b, l ) CLDAP NOT SUPPORTED +#endif /* udp_read */ + +#define EXBUFSIZ 1024 +size_t lber_bufsize = EXBUFSIZ; + +#ifdef LDAP_DEBUG +int lber_debug; +#endif + +/* + * function prototypes + */ +static void nslberi_install_compat_io_fns( Sockbuf *sb ); +static int nslberi_extread_compat( int s, void *buf, int len, + struct lextiof_socket_private *arg ); +static int nslberi_extwrite_compat( int s, const void *buf, int len, + struct lextiof_socket_private *arg ); +static ber_tag_t get_tag( Sockbuf *sb, BerElement *ber); +static ber_len_t get_ber_len( BerElement *ber); +static ber_len_t read_len_in_ber( Sockbuf *sb, BerElement *ber); + +/* + * internal global structure for memory allocation callback functions + */ +static struct lber_memalloc_fns nslberi_memalloc_fns; + + +/* + * buffered read from "sb". + * returns value of first character read on success and -1 on error. + */ +static int +ber_filbuf( Sockbuf *sb, ber_slen_t len ) +{ + ssize_t rc; +#ifdef CLDAP + int addrlen; +#endif /* CLDAP */ + + if ( sb->sb_ber.ber_buf == NULL ) { + if ( (sb->sb_ber.ber_buf = (char *)NSLBERI_MALLOC( + READBUFSIZ )) == NULL ) { + return( -1 ); + } + sb->sb_ber.ber_flags &= ~LBER_FLAG_NO_FREE_BUFFER; + sb->sb_ber.ber_ptr = sb->sb_ber.ber_buf; + sb->sb_ber.ber_end = sb->sb_ber.ber_buf; + } + + if ( sb->sb_naddr > 0 ) { +#ifdef CLDAP + rc = udp_read(sb, sb->sb_ber.ber_buf, READBUFSIZ, addrlen ); +#ifdef LDAP_DEBUG + if ( lber_debug ) { + char msg[80]; + sprintf( msg, "ber_filbuf udp_read %d bytes\n", + rc ); + ber_err_print( msg ); + if ( lber_debug > 1 && rc > 0 ) + lber_bprint( sb->sb_ber.ber_buf, rc ); + } +#endif /* LDAP_DEBUG */ +#else /* CLDAP */ + rc = -1; +#endif /* CLDAP */ + } else { + if ( sb->sb_ext_io_fns.lbextiofn_read != NULL ) { + rc = sb->sb_ext_io_fns.lbextiofn_read( + sb->sb_sd, sb->sb_ber.ber_buf, + ((sb->sb_options & LBER_SOCKBUF_OPT_NO_READ_AHEAD) + && (len < READBUFSIZ)) ? len : READBUFSIZ, + sb->sb_ext_io_fns.lbextiofn_socket_arg ); + } else { +#ifdef NSLDAPI_AVOID_OS_SOCKETS + return( -1 ); +#else + rc = read( sb->sb_sd, sb->sb_ber.ber_buf, + ((sb->sb_options & LBER_SOCKBUF_OPT_NO_READ_AHEAD) + && (len < READBUFSIZ)) ? len : READBUFSIZ ); +#endif + } + } + + if ( rc > 0 ) { + sb->sb_ber.ber_ptr = sb->sb_ber.ber_buf + 1; + sb->sb_ber.ber_end = sb->sb_ber.ber_buf + rc; + return( (unsigned char)*sb->sb_ber.ber_buf ); + } + + return( -1 ); +} + + +static ber_int_t +BerRead( Sockbuf *sb, char *buf, ber_slen_t len ) +{ + int c; + ber_int_t nread = 0; + + while (len > 0) + { + ber_int_t inberbuf = sb->sb_ber.ber_end - sb->sb_ber.ber_ptr; + if (inberbuf > 0) + { + size_t tocopy = len > inberbuf ? inberbuf : len; + SAFEMEMCPY(buf, sb->sb_ber.ber_ptr, tocopy); + buf += tocopy; + sb->sb_ber.ber_ptr += tocopy; + nread += tocopy; + len -= tocopy; + } + else + { + c = ber_filbuf(sb, len); + if (c < 0) + { + if (nread > 0) + break; + else + return c; + } + *buf++ = c; + nread++; + len--; + } + } + return (nread); +} + + +/* + * Note: ber_read() only uses the ber_end and ber_ptr elements of ber. + * Functions like ber_get_tag(), ber_skip_tag, and ber_peek_tag() rely on + * that fact, so if this code is changed to use any additional elements of + * the ber structure, those functions will need to be changed as well. + */ +ber_int_t +LDAP_CALL +ber_read( BerElement *ber, char *buf, ber_len_t len ) +{ + ber_len_t actuallen; + ber_uint_t nleft; + + nleft = ber->ber_end - ber->ber_ptr; + actuallen = nleft < len ? nleft : len; + + SAFEMEMCPY( buf, ber->ber_ptr, (size_t)actuallen ); + + ber->ber_ptr += actuallen; + + return( (ber_int_t)actuallen ); +} + +/* + * enlarge the ber buffer. + * return 0 on success, -1 on error. + */ +int +nslberi_ber_realloc( BerElement *ber, ber_len_t len ) +{ + ber_uint_t need, have, total; + size_t have_bytes; + Seqorset *s; + ber_int_t off; + char *oldbuf; + int freeoldbuf = 0; + + ber->ber_buf_reallocs++; + + have_bytes = ber->ber_end - ber->ber_buf; + have = have_bytes / lber_bufsize; + need = (len < lber_bufsize ? 1 : (len + (lber_bufsize - 1)) / lber_bufsize); + total = have * lber_bufsize + need * lber_bufsize * ber->ber_buf_reallocs; + + oldbuf = ber->ber_buf; + + if (ber->ber_buf == NULL) { + if ( (ber->ber_buf = (char *)NSLBERI_MALLOC( (size_t)total )) + == NULL ) { + return( -1 ); + } + ber->ber_flags &= ~LBER_FLAG_NO_FREE_BUFFER; + } else { + if ( !(ber->ber_flags & LBER_FLAG_NO_FREE_BUFFER) ) { + freeoldbuf = 1; + } + /* transition to malloc'd buffer */ + if ( (ber->ber_buf = (char *)NSLBERI_MALLOC( + (size_t)total )) == NULL ) { + return( -1 ); + } + ber->ber_flags &= ~LBER_FLAG_NO_FREE_BUFFER; + /* copy existing data into new malloc'd buffer */ + SAFEMEMCPY( ber->ber_buf, oldbuf, have_bytes ); + } + + ber->ber_end = ber->ber_buf + total; + + /* + * If the stinking thing was moved, we need to go through and + * reset all the sos and ber pointers. Offsets would've been + * a better idea... oh well. + */ + + if ( ber->ber_buf != oldbuf ) { + ber->ber_ptr = ber->ber_buf + (ber->ber_ptr - oldbuf); + + for ( s = ber->ber_sos; s != NULLSEQORSET; s = s->sos_next ) { + off = s->sos_first - oldbuf; + s->sos_first = ber->ber_buf + off; + + off = s->sos_ptr - oldbuf; + s->sos_ptr = ber->ber_buf + off; + } + + if ( freeoldbuf && oldbuf ) { + NSLBERI_FREE( oldbuf ); + } + } + + return( 0 ); +} + +/* + * returns "len" on success and -1 on failure. + */ +ber_int_t +LDAP_CALL +ber_write( BerElement *ber, char *buf, ber_len_t len, int nosos ) +{ + if ( nosos || ber->ber_sos == NULL ) { + if ( ber->ber_ptr + len > ber->ber_end ) { + if ( nslberi_ber_realloc( ber, len ) != 0 ) + return( -1 ); + } + SAFEMEMCPY( ber->ber_ptr, buf, (size_t)len ); + ber->ber_ptr += len; + return( len ); + } else { + if ( ber->ber_sos->sos_ptr + len > ber->ber_end ) { + if ( nslberi_ber_realloc( ber, len ) != 0 ) + return( -1 ); + } + SAFEMEMCPY( ber->ber_sos->sos_ptr, buf, (size_t)len ); + ber->ber_sos->sos_ptr += len; + ber->ber_sos->sos_clen += len; + return( len ); + } +} + +void +LDAP_CALL +ber_free( BerElement *ber, int freebuf ) +{ + if ( ber != NULL ) { + if ( freebuf && + !(ber->ber_flags & LBER_FLAG_NO_FREE_BUFFER)) { + NSLBERI_FREE(ber->ber_buf); + } + NSLBERI_FREE( (char *) ber ); + } +} + +/* + * return >= 0 on success, -1 on failure. + */ +int +LDAP_CALL +ber_flush( Sockbuf *sb, BerElement *ber, int freeit ) +{ + ssize_t nwritten = 0, towrite, rc; + int i = 0; + + if (ber->ber_rwptr == NULL) { + ber->ber_rwptr = ber->ber_buf; + } else if (ber->ber_rwptr >= ber->ber_end) { + /* we will use the ber_rwptr to continue an exited flush, + so if rwptr is not within the buffer we return an error. */ + return( -1 ); + } + + /* writev section - for iDAR only!!! */ + if (sb->sb_ext_io_fns.lbextiofn_writev != NULL) { + + /* add the sizes of the different buffers to write with writev */ + for (towrite = 0, i = 0; i < BER_ARRAY_QUANTITY; ++i) { + /* don't add lengths of null buffers - writev will ignore them */ + if (ber->ber_struct[i].ldapiov_base) { + towrite += ber->ber_struct[i].ldapiov_len; + } + } + + rc = sb->sb_ext_io_fns.lbextiofn_writev(sb->sb_sd, ber->ber_struct, BER_ARRAY_QUANTITY, + sb->sb_ext_io_fns.lbextiofn_socket_arg); + + if ( freeit ) + ber_free( ber, 1 ); + + if (rc >= 0) { + /* return the number of bytes TO BE written */ + return (towrite - rc); + } else { + /* otherwise it's an error */ + return (rc); + } + } /* end writev section */ + + towrite = ber->ber_ptr - ber->ber_rwptr; + +#ifdef LDAP_DEBUG + if ( lber_debug ) { + char msg[80]; + sprintf( msg, "ber_flush: %d bytes to sd %ld%s\n", (int)towrite, + sb->sb_sd, ber->ber_rwptr != ber->ber_buf ? " (re-flush)" + : "" ); + ber_err_print( msg ); + if ( lber_debug > 1 ) + lber_bprint( ber->ber_rwptr, towrite ); + } +#endif +#if !defined(macintosh) && !defined(DOS) + if ( sb->sb_options & (LBER_SOCKBUF_OPT_TO_FILE | LBER_SOCKBUF_OPT_TO_FILE_ONLY) ) { + rc = write( sb->sb_copyfd, ber->ber_buf, towrite ); + if ( sb->sb_options & LBER_SOCKBUF_OPT_TO_FILE_ONLY ) { + return( (int)rc ); + } + } +#endif + + nwritten = 0; + do { + if (sb->sb_naddr > 0) { +#ifdef CLDAP + rc = udp_write( sb, ber->ber_buf + nwritten, + (size_t)towrite ); +#else /* CLDAP */ + rc = -1; +#endif /* CLDAP */ + if ( rc <= 0 ) + return( -1 ); + /* fake error if write was not atomic */ + if (rc < towrite) { +#if !defined( macintosh ) && !defined( DOS ) + errno = EMSGSIZE; /* For Win32, see portable.h */ +#endif + return( -1 ); + } + } else { + if ( sb->sb_ext_io_fns.lbextiofn_write != NULL ) { + if ( (rc = sb->sb_ext_io_fns.lbextiofn_write( + sb->sb_sd, ber->ber_rwptr, (size_t)towrite, + sb->sb_ext_io_fns.lbextiofn_socket_arg )) + <= 0 ) { + return( -1 ); + } + } else { +#ifdef NSLDAPI_AVOID_OS_SOCKETS + return( -1 ); +#else + if ( (rc = BerWrite( sb, ber->ber_rwptr, + (size_t) towrite )) <= 0 ) { + return( -1 ); + } +#endif + } + } + towrite -= rc; + nwritten += rc; + ber->ber_rwptr += rc; + } while ( towrite > 0 ); + + if ( freeit ) + ber_free( ber, 1 ); + + return( 0 ); +} + + +/* we pre-allocate a buffer to save the extra malloc later */ +BerElement * +LDAP_CALL +ber_alloc_t( int options ) +{ + BerElement *ber; + + if ( (ber = (BerElement*)NSLBERI_CALLOC( 1, + sizeof(struct berelement) + lber_bufsize )) == NULL ) { + return( NULL ); + } + + /* + * for compatibility with the C LDAP API standard, we recognize + * LBER_USE_DER as LBER_OPT_USE_DER. See lber.h for a bit more info. + */ + if ( options & LBER_USE_DER ) { + options &= ~LBER_USE_DER; + options |= LBER_OPT_USE_DER; + } + + ber->ber_tag = LBER_DEFAULT; + ber->ber_options = options; + ber->ber_buf = (char*)ber + sizeof(struct berelement); + ber->ber_ptr = ber->ber_buf; + ber->ber_end = ber->ber_buf + lber_bufsize; + ber->ber_flags = LBER_FLAG_NO_FREE_BUFFER; + + return( ber ); +} + + +BerElement * +LDAP_CALL +ber_alloc() +{ + return( ber_alloc_t( 0 ) ); +} + +BerElement * +LDAP_CALL +der_alloc() +{ + return( ber_alloc_t( LBER_OPT_USE_DER ) ); +} + +BerElement * +LDAP_CALL +ber_dup( BerElement *ber ) +{ + BerElement *new; + + if ( (new = ber_alloc()) == NULL ) + return( NULL ); + + *new = *ber; + + return( new ); +} + + +void +LDAP_CALL +ber_init_w_nullchar( BerElement *ber, int options ) +{ + (void) memset( (char *)ber, '\0', sizeof(struct berelement) ); + ber->ber_tag = LBER_DEFAULT; + + /* + * For compatibility with the C LDAP API standard, we recognize + * LBER_USE_DER as LBER_OPT_USE_DER. See lber.h for a bit more info. + */ + if ( options & LBER_USE_DER ) { + options &= ~LBER_USE_DER; + options |= LBER_OPT_USE_DER; + } + + ber->ber_options = options; +} + +void +LDAP_CALL +ber_reset( BerElement *ber, int was_writing ) +{ + if ( was_writing ) { + ber->ber_end = ber->ber_ptr; + ber->ber_ptr = ber->ber_buf; + } else { + ber->ber_ptr = ber->ber_end; + } + + ber->ber_rwptr = NULL; + ber->ber_tag_len_read = 0; + + memset(ber->ber_struct, 0, BER_CONTENTS_STRUCT_SIZE); +} + +/* Returns the length of the ber buffer so far, + taking into account sequences/sets also. + CAUTION: Returns 0 on null buffers as well + as 0 on empty buffers! +*/ +size_t +LDAP_CALL +ber_get_buf_datalen( BerElement *ber ) +{ + size_t datalen; + + if ( ( ber == NULL) || ( ber->ber_buf == NULL) || ( ber->ber_ptr == NULL ) ) { + datalen = 0; + } else if (ber->ber_sos == NULLSEQORSET) { + /* there are no sequences or sets yet, + so just subtract ptr from the beginning of the ber buffer */ + datalen = ber->ber_ptr - ber->ber_buf; + } else { + /* sequences exist, so just take the ptr of the sequence + on top of the stack and subtract the beginning of the + buffer from it */ + datalen = ber->ber_sos->sos_ptr - ber->ber_buf; + } + + return datalen; +} + +/* + if buf is 0 then malloc a buffer of length size + returns > 0 on success, 0 otherwise +*/ +int +LDAP_CALL +ber_stack_init(BerElement *ber, int options, char * buf, + size_t size) +{ + if (NULL == ber) + return 0; + + memset(ber, 0, sizeof(*ber)); + + /* + * for compatibility with the C LDAP API standard, we recognize + * LBER_USE_DER as LBER_OPT_USE_DER. See lber.h for a bit more info. + */ + + if ( options & LBER_USE_DER ) { + options &= ~LBER_USE_DER; + options |= LBER_OPT_USE_DER; + } + + ber->ber_tag = LBER_DEFAULT; + ber->ber_options = options; + + if ( ber->ber_buf && !(ber->ber_flags & LBER_FLAG_NO_FREE_BUFFER)) { + NSLBERI_FREE(ber->ber_buf); + } + + if (buf) { + ber->ber_buf = ber->ber_ptr = buf; + ber->ber_flags = LBER_FLAG_NO_FREE_BUFFER; + } else { + ber->ber_buf = ber->ber_ptr = (char *) NSLBERI_MALLOC(size); + } + + ber->ber_end = ber->ber_buf + size; + + return ber->ber_buf != 0; +} + +/* + * This call allows to release only the data part of + * the target Sockbuf. + * Other info of this Sockbuf are kept unchanged. + */ +void +LDAP_CALL +ber_sockbuf_free_data(Sockbuf *p) +{ + if ( p != NULL ) { + if ( p->sb_ber.ber_buf != NULL && + !(p->sb_ber.ber_flags & LBER_FLAG_NO_FREE_BUFFER) ) { + NSLBERI_FREE( p->sb_ber.ber_buf ); + p->sb_ber.ber_buf = NULL; + } + } +} + +/* simply returns ber_buf in the ber ... + explicitly for DS MMR only... +*/ +char * +LDAP_CALL +ber_get_buf_databegin (BerElement * ber) +{ + if (NULL != ber) { + return ber->ber_buf; + } else { + return NULL; + } +} + +#ifdef LDAP_DEBUG + +void +ber_dump( BerElement *ber, int inout ) +{ + char msg[128]; + sprintf( msg, "ber_dump: buf 0x%p, ptr 0x%p, rwptr 0x%p, end 0x%p\n", + ber->ber_buf, ber->ber_ptr, ber->ber_rwptr, ber->ber_end ); + ber_err_print( msg ); + if ( inout == 1 ) { + sprintf( msg, " current len %ld, contents:\n", + (long)(ber->ber_end - ber->ber_ptr) ); + ber_err_print( msg ); + lber_bprint( ber->ber_ptr, ber->ber_end - ber->ber_ptr ); + } else { + sprintf( msg, " current len %ld, contents:\n", + (long)(ber->ber_ptr - ber->ber_buf) ); + ber_err_print( msg ); + lber_bprint( ber->ber_buf, ber->ber_ptr - ber->ber_buf ); + } +} + +void +ber_sos_dump( Seqorset *sos ) +{ + char msg[80]; + ber_err_print ( "*** sos dump ***\n" ); + while ( sos != NULLSEQORSET ) { + sprintf( msg, "ber_sos_dump: clen %d first 0x%p ptr 0x%p\n", + sos->sos_clen, sos->sos_first, sos->sos_ptr ); + ber_err_print( msg ); + sprintf( msg, " current len %ld contents:\n", + (long)(sos->sos_ptr - sos->sos_first) ); + ber_err_print( msg ); + lber_bprint( sos->sos_first, sos->sos_ptr - sos->sos_first ); + + sos = sos->sos_next; + } + ber_err_print( "*** end dump ***\n" ); +} + +#endif + +/* return the tag - LBER_DEFAULT returned means trouble + * assumes the tag is only one byte! */ +static ber_tag_t +get_tag( Sockbuf *sb, BerElement *ber) +{ + unsigned char xbyte; + + if ( (BerRead( sb, (char *) &xbyte, 1 )) != 1 ) { + return( LBER_DEFAULT ); + } + + /* we only handle small (one byte) tags */ + if ( (xbyte & LBER_BIG_TAG_MASK) == LBER_BIG_TAG_MASK ) { + return( LBER_DEFAULT ); + } + + ber->ber_tag_contents[0] = xbyte; + ber->ber_struct[BER_STRUCT_TAG].ldapiov_len = 1; + return((ber_tag_t)xbyte); +} + + +/* Error checking? */ +/* Takes a ber and returns the actual length */ +static ber_len_t +get_ber_len( BerElement *ber) +{ + int noctets; + ber_len_t len = 0; + char xbyte; + + xbyte = ber->ber_len_contents[0]; + + /* long form */ + if (xbyte & 0x80) { + noctets = (int) (xbyte & 0x7f); + if (noctets >= MAX_LEN_SIZE) { + return(LBER_DEFAULT); + } + SAFEMEMCPY((char*) &len + sizeof(ber_len_t) - noctets, &ber->ber_len_contents[1], noctets); + len = LBER_NTOHL(len); + return(len); + } else { + return((ber_len_t)(xbyte)); + } +} + +/* LBER_DEFAULT means trouble + reads in the length, stores it in ber->ber_struct, and returns get_ber_len */ +static ber_len_t +read_len_in_ber( Sockbuf *sb, BerElement *ber) +{ + unsigned char xbyte; + int noctets; + int rc = 0, read_result = 0; + + /* + * Next, read the length. The first byte contains the length + * of the length. If bit 8 is set, the length is the long + * form, otherwise it's the short form. We don't allow a + * length that's greater than what we can hold in a ber_int_t + */ + if ( ber->ber_tag_len_read == 1) { + /* the length of the length hasn't been read yet */ + if ( BerRead( sb, (char *) &xbyte, 1 ) != 1 ) { + return( LBER_DEFAULT ); + } + ber->ber_tag_len_read = 2; + ber->ber_len_contents[0] = xbyte; + } else { + rc = ber->ber_tag_len_read - 2; + xbyte = ber->ber_len_contents[0]; + } + + /* long form of the length value */ + if ( xbyte & 0x80 ) { + noctets = (xbyte & 0x7f); + if ( noctets >= MAX_LEN_SIZE ) + return( LBER_DEFAULT ); + while (rc < noctets) { + read_result = BerRead( sb, &(ber->ber_len_contents[1]) + rc, noctets - rc ); + if (read_result <= 0) { + ber->ber_tag_len_read = rc + 2; /* so we can continue later - include tag and lenlen */ + return( LBER_DEFAULT ); + } + rc += read_result; + } + ber->ber_tag_len_read = rc + 2; /* adds tag (1 byte) and lenlen (1 byte) */ + ber->ber_struct[BER_STRUCT_LEN].ldapiov_len = 1 + noctets; + } else { /* short form of the length value */ + ber->ber_struct[BER_STRUCT_LEN].ldapiov_len = 1; + } + return(get_ber_len(ber)); +} + + +ber_tag_t +LDAP_CALL +ber_get_next( Sockbuf *sb, ber_len_t *len, BerElement *ber ) +{ + ber_len_t newlen; + ber_len_t toread; + ber_int_t rc; + ber_len_t orig_taglen_read = 0; + char * orig_rwptr = ber->ber_rwptr ? ber->ber_rwptr : ber->ber_buf; + +#ifdef LDAP_DEBUG + if ( lber_debug ) + ber_err_print( "ber_get_next\n" ); +#endif + + /* + * When rwptr is NULL this signifies that the tag and length have not been + * read in their entirety yet. (if at all) + */ + if ( ber->ber_rwptr == NULL ) { + + /* first save the amount we previously read, so we know what to return in len. */ + orig_taglen_read = ber->ber_tag_len_read; + + /* read the tag - if tag_len_read is greater than 0, then it has already been read. */ + if (ber->ber_tag_len_read == 0) { + if ((ber->ber_tag = get_tag(sb, ber)) == LBER_DEFAULT ) { + *len = 0; + return( LBER_DEFAULT ); + } + + ber->ber_tag_contents[0] = (char)ber->ber_tag; /* we only handle 1 byte tags */ + ber->ber_tag_len_read = 1; + + /* check for validity */ + if((sb->sb_options & LBER_SOCKBUF_OPT_VALID_TAG) && + (ber->ber_tag != sb->sb_valid_tag)) { + *len = 1; /* we just read the tag so far */ + return( LBER_DEFAULT); + } + } + + /* read the length */ + if ((newlen = read_len_in_ber(sb, ber)) == LBER_DEFAULT ) { + *len = ber->ber_tag_len_read - orig_taglen_read; + return( LBER_DEFAULT ); + } + + /* + * Finally, malloc a buffer for the contents and read it in. + * It's this buffer that's passed to all the other ber decoding + * routines. + */ + +#if defined( DOS ) && !( defined( _WIN32 ) || defined(XP_OS2) ) + if ( newlen > 65535 ) { /* DOS can't allocate > 64K */ + return( LBER_DEFAULT ); + } +#endif /* DOS && !_WIN32 */ + + if ( ( sb->sb_options & LBER_SOCKBUF_OPT_MAX_INCOMING_SIZE ) + && newlen > sb->sb_max_incoming ) { + return( LBER_DEFAULT ); + } + + /* check to see if we already have enough memory allocated */ + if ( ((ber_len_t) ber->ber_end - (ber_len_t) ber->ber_buf) < newlen) { + if ( ber->ber_buf && !(ber->ber_flags & LBER_FLAG_NO_FREE_BUFFER)) { + NSLBERI_FREE(ber->ber_buf); + } + if ( (ber->ber_buf = (char *)NSLBERI_CALLOC( 1,(size_t)newlen )) + == NULL ) { + return( LBER_DEFAULT ); + } + ber->ber_flags &= ~LBER_FLAG_NO_FREE_BUFFER; + orig_rwptr = ber->ber_buf; + } + + + ber->ber_len = newlen; + ber->ber_ptr = ber->ber_buf; + ber->ber_end = ber->ber_buf + newlen; + ber->ber_rwptr = ber->ber_buf; + ber->ber_tag_len_read = 0; /* now that rwptr is set, this doesn't matter */ + } + + /* OK, we've malloc-ed the buffer; now read the rest of the expected length */ + toread = (ber_len_t)ber->ber_end - (ber_len_t)ber->ber_rwptr; + do { + if ( (rc = BerRead( sb, ber->ber_rwptr, (ber_int_t)toread )) <= 0 ) { + *len = (ber_len_t) ber->ber_rwptr - (ber_len_t) orig_rwptr; + return( LBER_DEFAULT ); + } + + toread -= rc; + ber->ber_rwptr += rc; + } while ( toread > 0 ); + +#ifdef LDAP_DEBUG + if ( lber_debug ) { + char msg[80]; + sprintf( msg, "ber_get_next: tag 0x%x len %d contents:\n", + ber->ber_tag, ber->ber_len ); + ber_err_print( msg ); + if ( lber_debug > 1 ) + ber_dump( ber, 1 ); + } +#endif + + *len = (ber_len_t) ber->ber_rwptr - (ber_len_t) orig_rwptr; + ber->ber_rwptr = NULL; + ber->ber_struct[BER_STRUCT_VAL].ldapiov_len = ber->ber_len; + return( ber->ber_tag ); +} + +Sockbuf * +LDAP_CALL +ber_sockbuf_alloc() +{ + return( (Sockbuf *)NSLBERI_CALLOC( 1, sizeof(struct sockbuf) ) ); +} + +void +LDAP_CALL +ber_sockbuf_free(Sockbuf *p) +{ + if ( p != NULL ) { + if ( p->sb_ber.ber_buf != NULL && + !(p->sb_ber.ber_flags & LBER_FLAG_NO_FREE_BUFFER) ) { + NSLBERI_FREE( p->sb_ber.ber_buf ); + } + NSLBERI_FREE(p); + } +} + +/* + * return 0 on success and -1 on error + */ +int +LDAP_CALL +ber_set_option( struct berelement *ber, int option, void *value ) +{ + + /* + * memory allocation callbacks are global, so it is OK to pass + * NULL for ber. Handle this as a special case. + */ + if ( option == LBER_OPT_MEMALLOC_FN_PTRS ) { + /* struct copy */ + nslberi_memalloc_fns = *((struct lber_memalloc_fns *)value); + return( 0 ); + } + + /* + * lber_debug is global, so it is OK to pass + * NULL for ber. Handle this as a special case. + */ + if ( option == LBER_OPT_DEBUG_LEVEL ) { +#ifdef LDAP_DEBUG + lber_debug = *(int *)value; +#endif + return( 0 ); + } + + /* + * lber_bufsize is global, so it is OK to pass + * NULL for ber. Handle this as a special case. + */ + if ( option == LBER_OPT_BUFSIZE ) { + if ( *(size_t *)value > EXBUFSIZ ) { + lber_bufsize = *(size_t *)value; + } + return( 0 ); + } + + /* + * all the rest require a non-NULL ber + */ + if ( !NSLBERI_VALID_BERELEMENT_POINTER( ber )) { + return( -1 ); + } + + switch ( option ) { + case LBER_OPT_USE_DER: + case LBER_OPT_TRANSLATE_STRINGS: + if ( value != NULL ) { + ber->ber_options |= option; + } else { + ber->ber_options &= ~option; + } + break; + case LBER_OPT_REMAINING_BYTES: + ber->ber_end = ber->ber_ptr + *((ber_len_t *)value); + break; + case LBER_OPT_TOTAL_BYTES: + ber->ber_end = ber->ber_buf + *((ber_len_t *)value); + break; + case LBER_OPT_BYTES_TO_WRITE: + ber->ber_ptr = ber->ber_buf + *((ber_len_t *)value); + break; + default: + return( -1 ); + } + + return( 0 ); +} + +/* + * return 0 on success and -1 on error + */ +int +LDAP_CALL +ber_get_option( struct berelement *ber, int option, void *value ) +{ + /* + * memory callocation callbacks are global, so it is OK to pass + * NULL for ber. Handle this as a special case + */ + if ( option == LBER_OPT_MEMALLOC_FN_PTRS ) { + /* struct copy */ + *((struct lber_memalloc_fns *)value) = nslberi_memalloc_fns; + return( 0 ); + } + + /* + * lber_debug is global, so it is OK to pass + * NULL for ber. Handle this as a special case. + */ + if ( option == LBER_OPT_DEBUG_LEVEL ) { +#ifdef LDAP_DEBUG + *(int *)value = lber_debug; +#endif + return( 0 ); + } + + /* + * lber_bufsize is global, so it is OK to pass + * NULL for ber. Handle this as a special case. + */ + if ( option == LBER_OPT_BUFSIZE ) { + *(size_t *)value = lber_bufsize; + return( 0 ); + } + + /* + * all the rest require a non-NULL ber + */ + if ( !NSLBERI_VALID_BERELEMENT_POINTER( ber )) { + return( -1 ); + } + + switch ( option ) { + case LBER_OPT_USE_DER: + case LBER_OPT_TRANSLATE_STRINGS: + *((int *) value) = (ber->ber_options & option); + break; + case LBER_OPT_REMAINING_BYTES: + *((ber_len_t *) value) = ber->ber_end - ber->ber_ptr; + break; + case LBER_OPT_TOTAL_BYTES: + *((ber_len_t *) value) = ber->ber_end - ber->ber_buf; + break; + case LBER_OPT_BYTES_TO_WRITE: + *((ber_len_t *) value) = ber->ber_ptr - ber->ber_buf; + break; + default: + return( -1 ); + } + + return( 0 ); +} + +/* + * return 0 on success and -1 on error + */ +int +LDAP_CALL +ber_sockbuf_set_option( Sockbuf *sb, int option, void *value ) +{ + struct lber_x_ext_io_fns *extiofns; + + if ( !NSLBERI_VALID_SOCKBUF_POINTER( sb )) { + return( -1 ); + } + + /* check for a NULL value for certain options. */ + if (NULL == value) { + switch ( option ) { + case LBER_SOCKBUF_OPT_TO_FILE: + case LBER_SOCKBUF_OPT_TO_FILE_ONLY: + case LBER_SOCKBUF_OPT_NO_READ_AHEAD: + case LBER_SOCKBUF_OPT_READ_FN: + case LBER_SOCKBUF_OPT_WRITE_FN: + case LBER_SOCKBUF_OPT_EXT_IO_FNS: + case LBER_SOCKBUF_OPT_MAX_INCOMING_SIZE: + /* do nothing - it's OK to have a NULL value for these options */ + break; + default: + return( -1 ); + } + } + + switch ( option ) { + case LBER_SOCKBUF_OPT_VALID_TAG: + sb->sb_valid_tag= *((ber_tag_t *) value); + /* use NULL to reset */ + if ( value != NULL ) { + sb->sb_options |= option; + } else { + sb->sb_options &= ~option; + } + break; + case LBER_SOCKBUF_OPT_MAX_INCOMING_SIZE: + if ( value != NULL ) { + sb->sb_max_incoming = *((ber_len_t *) value); + sb->sb_options |= option; + } else { + /* setting the max incoming to 0 seems to be the only + way to tell the callers of ber_sockbuf_get_option + that this option isn't set. */ + sb->sb_max_incoming = 0; + sb->sb_options &= ~option; + } + break; + case LBER_SOCKBUF_OPT_TO_FILE: + case LBER_SOCKBUF_OPT_TO_FILE_ONLY: + case LBER_SOCKBUF_OPT_NO_READ_AHEAD: + if ( value != NULL ) { + sb->sb_options |= option; + } else { + sb->sb_options &= ~option; + } + break; + case LBER_SOCKBUF_OPT_DESC: + sb->sb_sd = *((LBER_SOCKET *) value); + break; + case LBER_SOCKBUF_OPT_COPYDESC: + sb->sb_copyfd = *((LBER_SOCKET *) value); + break; + case LBER_SOCKBUF_OPT_READ_FN: + sb->sb_io_fns.lbiof_read = (LDAP_IOF_READ_CALLBACK *) value; + nslberi_install_compat_io_fns( sb ); + break; + case LBER_SOCKBUF_OPT_WRITE_FN: + sb->sb_io_fns.lbiof_write = (LDAP_IOF_WRITE_CALLBACK *) value; + nslberi_install_compat_io_fns( sb ); + break; + case LBER_SOCKBUF_OPT_EXT_IO_FNS: + extiofns = (struct lber_x_ext_io_fns *) value; + if ( extiofns == NULL ) { /* remove */ + (void)memset( (char *)&sb->sb_ext_io_fns, '\0', + sizeof(sb->sb_ext_io_fns )); + } else if ( extiofns->lbextiofn_size + == LBER_X_EXTIO_FNS_SIZE ) { + /* struct copy */ + sb->sb_ext_io_fns = *extiofns; + } else if ( extiofns->lbextiofn_size + == LBER_X_EXTIO_FNS_SIZE_REV0 ) { + /* backwards compatiblity for older struct */ + sb->sb_ext_io_fns.lbextiofn_size = + LBER_X_EXTIO_FNS_SIZE; + sb->sb_ext_io_fns.lbextiofn_read = + extiofns->lbextiofn_read; + sb->sb_ext_io_fns.lbextiofn_write = + extiofns->lbextiofn_write; + sb->sb_ext_io_fns.lbextiofn_writev = NULL; + sb->sb_ext_io_fns.lbextiofn_socket_arg = + extiofns->lbextiofn_socket_arg; + } else { + return( -1 ); + } + break; + case LBER_SOCKBUF_OPT_SOCK_ARG: + sb->sb_ext_io_fns.lbextiofn_socket_arg = + (struct lextiof_socket_private *) value; + break; + default: + return( -1 ); + } + + return( 0 ); +} + +/* + * return 0 on success and -1 on error + */ +int +LDAP_CALL +ber_sockbuf_get_option( Sockbuf *sb, int option, void *value ) +{ + struct lber_x_ext_io_fns *extiofns; + + if ( !NSLBERI_VALID_SOCKBUF_POINTER( sb ) || (NULL == value)) { + return( -1 ); + } + + switch ( option ) { + case LBER_SOCKBUF_OPT_VALID_TAG: + *((ber_tag_t *) value) = sb->sb_valid_tag; + break; + case LBER_SOCKBUF_OPT_MAX_INCOMING_SIZE: + *((ber_len_t *) value) = sb->sb_max_incoming; + break; + case LBER_SOCKBUF_OPT_TO_FILE: + case LBER_SOCKBUF_OPT_TO_FILE_ONLY: + case LBER_SOCKBUF_OPT_NO_READ_AHEAD: + *((int *) value) = (sb->sb_options & option); + break; + case LBER_SOCKBUF_OPT_DESC: + *((LBER_SOCKET *) value) = sb->sb_sd; + break; + case LBER_SOCKBUF_OPT_COPYDESC: + *((LBER_SOCKET *) value) = sb->sb_copyfd; + break; + case LBER_SOCKBUF_OPT_READ_FN: + *((LDAP_IOF_READ_CALLBACK **) value) + = sb->sb_io_fns.lbiof_read; + break; + case LBER_SOCKBUF_OPT_WRITE_FN: + *((LDAP_IOF_WRITE_CALLBACK **) value) + = sb->sb_io_fns.lbiof_write; + break; + case LBER_SOCKBUF_OPT_EXT_IO_FNS: + extiofns = (struct lber_x_ext_io_fns *) value; + if ( extiofns == NULL ) { + return( -1 ); + } else if ( extiofns->lbextiofn_size + == LBER_X_EXTIO_FNS_SIZE ) { + /* struct copy */ + *extiofns = sb->sb_ext_io_fns; + } else if ( extiofns->lbextiofn_size + == LBER_X_EXTIO_FNS_SIZE_REV0 ) { + /* backwards compatiblity for older struct */ + extiofns->lbextiofn_read = sb->sb_ext_io_fns.lbextiofn_read; + extiofns->lbextiofn_write = sb->sb_ext_io_fns.lbextiofn_write; + extiofns->lbextiofn_socket_arg = sb->sb_ext_io_fns.lbextiofn_socket_arg; + } else { + return( -1 ); + } + break; + case LBER_SOCKBUF_OPT_SOCK_ARG: + *((struct lextiof_socket_private **)value) = sb->sb_ext_io_fns.lbextiofn_socket_arg; + break; + default: + return( -1 ); + } + + return( 0 ); +} + + +/* new dboreham code below: */ + +struct byte_buffer { + unsigned char *p; + int offset; + int length; +}; +typedef struct byte_buffer byte_buffer; + + +/* This call allocates us a BerElement structure plus some extra memory. + * It returns a pointer to the BerElement, plus a pointer to the extra memory. + * This routine also allocates a ber data buffer within the same block, thus + * saving a call to calloc later when we read data. + */ +void* +LDAP_CALL +ber_special_alloc(size_t size, BerElement **ppBer) +{ + char *mem = NULL; + + /* Make sure mem size requested is aligned */ + if (0 != ( size & 0x03 )) { + size += (sizeof(ber_int_t) - (size & 0x03)); + } + + mem = NSLBERI_MALLOC(sizeof(struct berelement) + lber_bufsize + size ); + if (NULL == mem) { + return NULL; + } + *ppBer = (BerElement*) (mem + size); + memset(*ppBer,0,sizeof(struct berelement)); + (*ppBer)->ber_tag = LBER_DEFAULT; + (*ppBer)->ber_buf = mem + size + sizeof(struct berelement); + (*ppBer)->ber_ptr = (*ppBer)->ber_buf; + (*ppBer)->ber_end = (*ppBer)->ber_buf + lber_bufsize; + (*ppBer)->ber_flags = LBER_FLAG_NO_FREE_BUFFER; + return (void*)mem; +} + +void +LDAP_CALL +ber_special_free(void* buf, BerElement *ber) +{ + if (!(ber->ber_flags & LBER_FLAG_NO_FREE_BUFFER)) { + NSLBERI_FREE(ber->ber_buf); + } + NSLBERI_FREE( buf ); +} + +/* Copy up to bytes_to_read bytes from b into return_buffer. + * Returns a count of bytes copied (always >= 0). + */ +static int +read_bytes(byte_buffer *b, unsigned char *return_buffer, int bytes_to_read) +{ + /* copy up to bytes_to_read bytes into the caller's buffer, return the number of bytes copied */ + int bytes_to_copy = 0; + + if (bytes_to_read <= (b->length - b->offset) ) { + bytes_to_copy = bytes_to_read; + } else { + bytes_to_copy = (b->length - b->offset); + } + if (1 == bytes_to_copy) { + *return_buffer = *(b->p+b->offset++); + } else if (bytes_to_copy <= 0) { + bytes_to_copy = 0; /* never return a negative result */ + } else { + SAFEMEMCPY(return_buffer,b->p+b->offset,bytes_to_copy); + b->offset += bytes_to_copy; + } + return bytes_to_copy; +} + +/* return the tag - LBER_DEFAULT returned means trouble */ +static ber_tag_t +get_buffer_tag(byte_buffer *sb ) +{ + unsigned char xbyte; + ber_tag_t tag; + char *tagp; + int i; + + if ( (i = read_bytes( sb, &xbyte, 1 )) != 1 ) { + return( LBER_DEFAULT ); + } + + if ( (xbyte & LBER_BIG_TAG_MASK) != LBER_BIG_TAG_MASK ) { + return( (ber_uint_t) xbyte ); + } + + tagp = (char *) &tag; + tagp[0] = xbyte; + for ( i = 1; i < sizeof(ber_int_t); i++ ) { + if ( read_bytes( sb, &xbyte, 1 ) != 1 ) + return( LBER_DEFAULT ); + + tagp[i] = xbyte; + + if ( ! (xbyte & LBER_MORE_TAG_MASK) ) + break; + } + + /* tag too big! */ + if ( i == sizeof(ber_int_t) ) + return( LBER_DEFAULT ); + + /* want leading, not trailing 0's */ + return( tag >> (sizeof(ber_int_t) - i - 1) ); +} + +/* Like ber_get_next, but from a byte buffer the caller already has. */ +/* Bytes_Scanned returns the number of bytes we actually looked at in the buffer. */ +/* ber_get_next_buffer is now implemented in terms of ber_get_next_buffer_ext */ +/* and is here for backward compatibility. This new function allows us to pass */ +/* the Sockbuf structure along */ + +ber_uint_t +LDAP_CALL +ber_get_next_buffer( void *buffer, size_t buffer_size, ber_len_t *len, + BerElement *ber, ber_uint_t *Bytes_Scanned ) +{ + return (ber_get_next_buffer_ext( buffer, buffer_size, len, ber, + Bytes_Scanned, NULL)); +} + +/* + * Returns the tag of the message or LBER_ return code if an error occurs. + * + * If there was not enough data in the buffer to complete the message this + * is a "soft" error. In this case, *Bytes_Scanned is set to a positive + * number and return code is set to LBER_DEFAULT. + * + * On overflow condition when the length is either bigger than ber_uint_t + * type or the value preset via LBER_SOCKBUF_OPT_MAX_INCOMING_SIZE option, + * *Bytes_Scanned is set to zero and return code is set to LBER_OVERFLOW. + * + * For backward compatibility errno is also set on these error conditions: + * + * EINVAL - LBER_SOCKBUF_OPT_VALID_TAG option set but tag doesnt match. + * EMSGSIZE - an overflow condition as described above for LBER_OVERFLOW. + */ +ber_uint_t +LDAP_CALL +ber_get_next_buffer_ext( void *buffer, size_t buffer_size, ber_len_t *len, + BerElement *ber, ber_uint_t *Bytes_Scanned, Sockbuf *sock ) +{ + ber_tag_t tag = 0; + ber_len_t netlen; + ber_len_t toread; + unsigned char lc; + ssize_t rc; + int noctets, diff; + byte_buffer sb = {0}; + + + /* + * Any ber element looks like this: tag length contents. + * Assuming everything's ok, we return the tag byte (we + * can assume a single byte), return the length in len, + * and the rest of the undecoded element in buf. + * + * Assumptions: + * 1) small tags (less than 128) + * 2) definite lengths + * 3) primitive encodings used whenever possible + */ + + /* + * first time through - malloc the buffer, set up ptrs, and + * read the tag and the length and as much of the rest as we can + */ + + sb.p = buffer; + sb.length = buffer_size; + + if ( ber->ber_rwptr == NULL ) { + + /* + * First, we read the tag. + */ + + /* if we have been called before with a fragment not + * containing a complete length, we have no rwptr but + * a tag already + */ + if ( ber->ber_tag == LBER_DEFAULT ) { + if ( (tag = get_buffer_tag( &sb )) == LBER_DEFAULT ) { + goto premature_exit; + } + ber->ber_tag = tag; + } + + if((sock->sb_options & LBER_SOCKBUF_OPT_VALID_TAG) && + (ber->ber_tag != sock->sb_valid_tag)) { +#if !defined( macintosh ) && !defined( DOS ) + errno = EINVAL; +#endif + goto error_exit; + } + + /* If we have been called before with an incomplete length, + * the fragment of the length read is in ber->ber_len_contents + * ber->ber_tag_len_read is the # of bytes of the length available + * from a previous fragment + */ + + if (ber->ber_tag_len_read) { + int nbytes; + + noctets = ((ber->ber_len_contents[0]) & 0x7f); + diff = noctets + 1 /* tag */ - ber->ber_tag_len_read; + + if ( (nbytes = read_bytes( &sb, (unsigned char *) &ber->ber_len_contents[0] + + ber->ber_tag_len_read, diff )) != diff ) { + + if (nbytes > 0) + ber->ber_tag_len_read+=nbytes; + + goto premature_exit; + } + *len = get_ber_len(ber); /* cast ber->ber_len_contents to unsigned long */ + + } else { + /* + * Next, read the length. The first byte contains the length + * of the length. If bit 8 is set, the length is the long + * form, otherwise it's the short form. We don't allow a + * length that's greater than what we can hold in an unsigned + * long. + */ + + *len = netlen = 0; + if ( read_bytes( &sb, &lc, 1 ) != 1 ) { + goto premature_exit; + } + if ( lc & 0x80 ) { + int nbytes; + + noctets = (lc & 0x7f); + if ( noctets > sizeof(ber_uint_t) ) { +#if !defined( macintosh ) && !defined( DOS ) + errno = EMSGSIZE; +#endif + *Bytes_Scanned = 0; + return(LBER_OVERFLOW); + } + diff = sizeof(ber_uint_t) - noctets; + if ( (nbytes = read_bytes( &sb, (unsigned char *)&netlen + diff, + noctets )) != noctets ) { + /* + * The length is in long form and we don't get it in one + * fragment, so stash partial length in the ber element + * for later use + */ + + ber->ber_tag_len_read = nbytes + 1; + ber->ber_len_contents[0]=lc; + memset(&(ber->ber_len_contents[1]), 0, sizeof(ber_uint_t)); + SAFEMEMCPY(&(ber->ber_len_contents[1]), (unsigned char *)&netlen + diff, nbytes); + + goto premature_exit; + } + *len = LBER_NTOHL( netlen ); + } else { + *len = lc; + } + } + + ber->ber_len = *len; + /* length fully decoded */ + ber->ber_tag_len_read=0; + /* + * Finally, malloc a buffer for the contents and read it in. + * It's this buffer that's passed to all the other ber decoding + * routines. + */ + +#if defined( DOS ) && !defined( _WIN32 ) + if ( *len > 65535 ) { /* DOS can't allocate > 64K */ + goto premature_exit; + } +#endif /* DOS && !_WIN32 */ + + if ( (sock != NULL) && + ( sock->sb_options & LBER_SOCKBUF_OPT_MAX_INCOMING_SIZE ) + && (*len > sock->sb_max_incoming) ) { +#if !defined( macintosh ) && !defined( DOS ) + errno = EMSGSIZE; +#endif + *Bytes_Scanned = 0; + return( LBER_OVERFLOW ); + } + + if ( ber->ber_buf + *len > ber->ber_end ) { + if ( nslberi_ber_realloc( ber, *len ) != 0 ) + goto error_exit; + } + ber->ber_ptr = ber->ber_buf; + ber->ber_end = ber->ber_buf + *len; + ber->ber_rwptr = ber->ber_buf; + } + + toread = (ber_len_t)ber->ber_end - (ber_len_t)ber->ber_rwptr; + do { + if ( (rc = read_bytes( &sb, (unsigned char *)ber->ber_rwptr, + (ber_int_t)toread )) <= 0 ) { + goto premature_exit; + } + + toread -= rc; + ber->ber_rwptr += rc; + } while ( toread > 0 ); + + *len = ber->ber_len; + *Bytes_Scanned = sb.offset; + return( ber->ber_tag ); + +premature_exit: + /* + * we're here because we hit the end of the buffer before seeing + * all of the PDU + */ + *Bytes_Scanned = sb.offset; + return(LBER_DEFAULT); + +error_exit: + *Bytes_Scanned = 0; + return(LBER_DEFAULT); +} + + +/* The ber_flatten routine allocates a struct berval whose contents + * are a BER encoding taken from the ber argument. The bvPtr pointer + * points to the returned berval, which must be freed using + * ber_bvfree(). This routine returns 0 on success and -1 on error. + * The use of ber_flatten on a BerElement in which all '{' and '}' + * format modifiers have not been properly matched can result in a + * berval whose contents are not a valid BER encoding. + * Note that the ber_ptr is not modified. + */ +int +LDAP_CALL +ber_flatten( BerElement *ber, struct berval **bvPtr ) +{ + struct berval *new; + ber_len_t len; + + /* allocate a struct berval */ + if ( (new = (struct berval *)NSLBERI_MALLOC( sizeof(struct berval) )) + == NULL ) { + return( -1 ); + } + + /* + * Copy everything from the BerElement's ber_buf to ber_ptr + * into the berval structure. + */ + if ( ber == NULL ) { + new->bv_val = NULL; + new->bv_len = 0; + } else { + len = ber->ber_ptr - ber->ber_buf; + if ( ( new->bv_val = (char *)NSLBERI_MALLOC( len + 1 )) == NULL ) { + ber_bvfree( new ); + return( -1 ); + } + SAFEMEMCPY( new->bv_val, ber->ber_buf, (size_t)len ); + new->bv_val[len] = '\0'; + new->bv_len = len; + } + + /* set bvPtr pointer to point to the returned berval */ + *bvPtr = new; + + return( 0 ); +} + + +/* + * The ber_init function constructs and returns a new BerElement + * containing a copy of the data in the bv argument. ber_init + * returns the null pointer on error. + */ +BerElement * +LDAP_CALL +ber_init( const struct berval *bv ) +{ + BerElement *ber; + + /* construct BerElement */ + if (( ber = ber_alloc_t( 0 )) != NULLBER ) { + /* copy data from the bv argument into BerElement */ + /* XXXmcs: had to cast unsigned long bv_len to long */ + if ( (ber_write ( ber, bv->bv_val, bv->bv_len, 0 )) + != (ber_slen_t)bv->bv_len ) { + ber_free( ber, 1 ); + return( NULL ); + } + } + + /* + * reset ber_ptr back to the beginning of buffer so that this new + * and initialized ber element can be READ + */ + ber_reset( ber, 1); + + /* + * return a ptr to a new BerElement containing a copy of the data + * in the bv argument or a null pointer on error + */ + return( ber ); +} + + +/* + * memory allocation functions. + */ +void * +nslberi_malloc( size_t size ) +{ + return( nslberi_memalloc_fns.lbermem_malloc == NULL ? + malloc( size ) : + nslberi_memalloc_fns.lbermem_malloc( size )); +} + + +void * +nslberi_calloc( size_t nelem, size_t elsize ) +{ + return( nslberi_memalloc_fns.lbermem_calloc == NULL ? + calloc( nelem, elsize ) : + nslberi_memalloc_fns.lbermem_calloc( nelem, elsize )); +} + + +void * +nslberi_realloc( void *ptr, size_t size ) +{ + return( nslberi_memalloc_fns.lbermem_realloc == NULL ? + realloc( ptr, size ) : + nslberi_memalloc_fns.lbermem_realloc( ptr, size )); +} + + +void +nslberi_free( void *ptr ) +{ + if ( nslberi_memalloc_fns.lbermem_free == NULL ) { + free( ptr ); + } else { + nslberi_memalloc_fns.lbermem_free( ptr ); + } +} + + +/* + ****************************************************************************** + * functions to bridge the gap between new extended I/O functions that are + * installed using ber_sockbuf_set_option( ..., LBER_SOCKBUF_OPT_EXT_IO_FNS, + * ... ). + * + * the basic strategy is to use the new extended arg to hold a pointer to the + * Sockbuf itself so we can find the old functions and call them. + * note that the integer socket s passed in is not used. we use the sb_sd + * from the Sockbuf itself because it is the correct type. + */ +static int +nslberi_extread_compat( int s, void *buf, int len, + struct lextiof_socket_private *arg ) +{ + Sockbuf *sb = (Sockbuf *)arg; + + return( sb->sb_io_fns.lbiof_read( sb->sb_sd, buf, len )); +} + + +static int +nslberi_extwrite_compat( int s, const void *buf, int len, + struct lextiof_socket_private *arg ) +{ + Sockbuf *sb = (Sockbuf *)arg; + + return( sb->sb_io_fns.lbiof_write( sb->sb_sd, buf, len )); +} + + +/* + * Install I/O compatiblity functions. This can't fail. + */ +static void +nslberi_install_compat_io_fns( Sockbuf *sb ) +{ + sb->sb_ext_io_fns.lbextiofn_size = LBER_X_EXTIO_FNS_SIZE; + sb->sb_ext_io_fns.lbextiofn_read = nslberi_extread_compat; + sb->sb_ext_io_fns.lbextiofn_write = nslberi_extwrite_compat; + sb->sb_ext_io_fns.lbextiofn_writev = NULL; + sb->sb_ext_io_fns.lbextiofn_socket_arg = (void *)sb; +} +/* + * end of compat I/O functions + ****************************************************************************** + */ |