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-rw-r--r--nsprpub/pr/src/misc/prnetdb.c2342
1 files changed, 2342 insertions, 0 deletions
diff --git a/nsprpub/pr/src/misc/prnetdb.c b/nsprpub/pr/src/misc/prnetdb.c
new file mode 100644
index 000000000..b2f6e435b
--- /dev/null
+++ b/nsprpub/pr/src/misc/prnetdb.c
@@ -0,0 +1,2342 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "primpl.h"
+
+#include <string.h>
+
+/*
+ * On Unix, the error code for gethostbyname() and gethostbyaddr()
+ * is returned in the global variable h_errno, instead of the usual
+ * errno.
+ */
+#if defined(XP_UNIX)
+#if defined(_PR_NEED_H_ERRNO)
+extern int h_errno;
+#endif
+#define _MD_GETHOST_ERRNO() h_errno
+#else
+#define _MD_GETHOST_ERRNO() _MD_ERRNO()
+#endif
+
+/*
+ * The meaning of the macros related to gethostbyname, gethostbyaddr,
+ * and gethostbyname2 is defined below.
+ * - _PR_HAVE_THREADSAFE_GETHOST: the gethostbyXXX functions return
+ * the result in thread specific storage. For example, AIX, HP-UX,
+ * and OSF1.
+ * - _PR_HAVE_GETHOST_R: have the gethostbyXXX_r functions. See next
+ * two macros.
+ * - _PR_HAVE_GETHOST_R_INT: the gethostbyXXX_r functions return an
+ * int. For example, Linux glibc.
+ * - _PR_HAVE_GETHOST_R_POINTER: the gethostbyXXX_r functions return
+ * a struct hostent* pointer. For example, Solaris and IRIX.
+ */
+#if defined(_PR_NO_PREEMPT) || defined(_PR_HAVE_GETHOST_R) \
+ || defined(_PR_HAVE_THREADSAFE_GETHOST)
+#define _PR_NO_DNS_LOCK
+#endif
+
+#if defined(_PR_NO_DNS_LOCK)
+#define LOCK_DNS()
+#define UNLOCK_DNS()
+#else
+PRLock *_pr_dnsLock = NULL;
+#define LOCK_DNS() PR_Lock(_pr_dnsLock)
+#define UNLOCK_DNS() PR_Unlock(_pr_dnsLock)
+#endif /* defined(_PR_NO_DNS_LOCK) */
+
+/*
+ * Some platforms have the reentrant getprotobyname_r() and
+ * getprotobynumber_r(). However, they come in three flavors.
+ * Some return a pointer to struct protoent, others return
+ * an int, and glibc's flavor takes five arguments.
+ */
+#if defined(XP_BEOS) && defined(BONE_VERSION)
+#include <arpa/inet.h> /* pick up define for inet_addr */
+#include <sys/socket.h>
+#define _PR_HAVE_GETPROTO_R
+#define _PR_HAVE_GETPROTO_R_POINTER
+#endif
+
+#if defined(SOLARIS) || (defined(BSDI) && defined(_REENTRANT)) \
+ || (defined(LINUX) && defined(_REENTRANT) \
+ && defined(__GLIBC__) && __GLIBC__ < 2)
+#define _PR_HAVE_GETPROTO_R
+#define _PR_HAVE_GETPROTO_R_POINTER
+#endif
+
+#if defined(OSF1) \
+ || defined(AIX4_3_PLUS) || (defined(AIX) && defined(_THREAD_SAFE)) \
+ || (defined(HPUX10_10) && defined(_REENTRANT)) \
+ || (defined(HPUX10_20) && defined(_REENTRANT)) \
+ || defined(OPENBSD)
+#define _PR_HAVE_GETPROTO_R
+#define _PR_HAVE_GETPROTO_R_INT
+#endif
+
+#if __FreeBSD_version >= 602000
+#define _PR_HAVE_GETPROTO_R
+#define _PR_HAVE_5_ARG_GETPROTO_R
+#endif
+
+/* BeOS has glibc but not the glibc-style getprotobyxxx_r functions. */
+#if (defined(__GLIBC__) && __GLIBC__ >= 2 && !defined(XP_BEOS))
+#define _PR_HAVE_GETPROTO_R
+#define _PR_HAVE_5_ARG_GETPROTO_R
+#endif
+
+#if !defined(_PR_HAVE_GETPROTO_R)
+PRLock* _getproto_lock = NULL;
+#endif
+
+#if defined(_PR_INET6_PROBE)
+extern PRBool _pr_ipv6_is_present(void);
+#endif
+
+#define _PR_IN6_IS_ADDR_UNSPECIFIED(a) \
+ (((a)->pr_s6_addr32[0] == 0) && \
+ ((a)->pr_s6_addr32[1] == 0) && \
+ ((a)->pr_s6_addr32[2] == 0) && \
+ ((a)->pr_s6_addr32[3] == 0))
+
+#define _PR_IN6_IS_ADDR_LOOPBACK(a) \
+ (((a)->pr_s6_addr32[0] == 0) && \
+ ((a)->pr_s6_addr32[1] == 0) && \
+ ((a)->pr_s6_addr32[2] == 0) && \
+ ((a)->pr_s6_addr[12] == 0) && \
+ ((a)->pr_s6_addr[13] == 0) && \
+ ((a)->pr_s6_addr[14] == 0) && \
+ ((a)->pr_s6_addr[15] == 0x1U))
+
+const PRIPv6Addr _pr_in6addr_any = {{{ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, 0, 0 }}};
+
+const PRIPv6Addr _pr_in6addr_loopback = {{{ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, 0, 0x1U }}};
+/*
+ * The values at bytes 10 and 11 are compared using pointers to
+ * 8-bit fields, and not 32-bit fields, to make the comparison work on
+ * both big-endian and little-endian systems
+ */
+
+#define _PR_IN6_IS_ADDR_V4MAPPED(a) \
+ (((a)->pr_s6_addr32[0] == 0) && \
+ ((a)->pr_s6_addr32[1] == 0) && \
+ ((a)->pr_s6_addr[8] == 0) && \
+ ((a)->pr_s6_addr[9] == 0) && \
+ ((a)->pr_s6_addr[10] == 0xff) && \
+ ((a)->pr_s6_addr[11] == 0xff))
+
+#define _PR_IN6_IS_ADDR_V4COMPAT(a) \
+ (((a)->pr_s6_addr32[0] == 0) && \
+ ((a)->pr_s6_addr32[1] == 0) && \
+ ((a)->pr_s6_addr32[2] == 0))
+
+#define _PR_IN6_V4MAPPED_TO_IPADDR(a) ((a)->pr_s6_addr32[3])
+
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETHOSTBYNAME2)
+
+/*
+ * The _pr_QueryNetIfs() function finds out if the system has
+ * IPv4 or IPv6 source addresses configured and sets _pr_have_inet_if
+ * and _pr_have_inet6_if accordingly.
+ *
+ * We have an implementation using SIOCGIFCONF ioctl and a
+ * default implementation that simply sets _pr_have_inet_if
+ * and _pr_have_inet6_if to true. A better implementation
+ * would be to use the routing sockets (see Chapter 17 of
+ * W. Richard Stevens' Unix Network Programming, Vol. 1, 2nd. Ed.)
+ */
+
+static PRLock *_pr_query_ifs_lock = NULL;
+static PRBool _pr_have_inet_if = PR_FALSE;
+static PRBool _pr_have_inet6_if = PR_FALSE;
+
+#undef DEBUG_QUERY_IFS
+
+#if defined(AIX) \
+ || (defined(DARWIN) && (!defined(HAVE_GETIFADDRS) \
+ || (defined(XP_MACOSX) && (!defined(MAC_OS_X_VERSION_10_2) || \
+ MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_2))))
+
+/*
+ * Use SIOCGIFCONF ioctl on platforms that don't have routing
+ * sockets. Warning: whether SIOCGIFCONF ioctl returns AF_INET6
+ * network interfaces is not portable.
+ *
+ * The _pr_QueryNetIfs() function is derived from the code in
+ * src/lib/libc/net/getifaddrs.c in BSD Unix and the code in
+ * Section 16.6 of W. Richard Stevens' Unix Network Programming,
+ * Vol. 1, 2nd. Ed.
+ */
+
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <net/if.h>
+
+#ifdef DEBUG_QUERY_IFS
+static void
+_pr_PrintIfreq(struct ifreq *ifr)
+{
+ PRNetAddr addr;
+ struct sockaddr *sa;
+ const char* family;
+ char addrstr[64];
+
+ sa = &ifr->ifr_addr;
+ if (sa->sa_family == AF_INET) {
+ struct sockaddr_in *sin = (struct sockaddr_in *)sa;
+ family = "inet";
+ memcpy(&addr.inet.ip, &sin->sin_addr, sizeof(sin->sin_addr));
+ } else if (sa->sa_family == AF_INET6) {
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
+ family = "inet6";
+ memcpy(&addr.ipv6.ip, &sin6->sin6_addr, sizeof(sin6->sin6_addr));
+ } else {
+ return; /* skip if not AF_INET or AF_INET6 */
+ }
+ addr.raw.family = sa->sa_family;
+ PR_NetAddrToString(&addr, addrstr, sizeof(addrstr));
+ printf("%s: %s %s\n", ifr->ifr_name, family, addrstr);
+}
+#endif
+
+static void
+_pr_QueryNetIfs(void)
+{
+ int sock;
+ int rv;
+ struct ifconf ifc;
+ struct ifreq *ifr;
+ struct ifreq *lifr;
+ PRUint32 len, lastlen;
+ char *buf;
+
+ if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
+ return;
+ }
+
+ /* Issue SIOCGIFCONF request in a loop. */
+ lastlen = 0;
+ len = 100 * sizeof(struct ifreq); /* initial buffer size guess */
+ for (;;) {
+ buf = (char *)PR_Malloc(len);
+ if (NULL == buf) {
+ close(sock);
+ return;
+ }
+ ifc.ifc_buf = buf;
+ ifc.ifc_len = len;
+ rv = ioctl(sock, SIOCGIFCONF, &ifc);
+ if (rv < 0) {
+ if (errno != EINVAL || lastlen != 0) {
+ close(sock);
+ PR_Free(buf);
+ return;
+ }
+ } else {
+ if (ifc.ifc_len == lastlen)
+ break; /* success, len has not changed */
+ lastlen = ifc.ifc_len;
+ }
+ len += 10 * sizeof(struct ifreq); /* increment */
+ PR_Free(buf);
+ }
+ close(sock);
+
+ ifr = ifc.ifc_req;
+ lifr = (struct ifreq *)&ifc.ifc_buf[ifc.ifc_len];
+
+ while (ifr < lifr) {
+ struct sockaddr *sa;
+ int sa_len;
+
+#ifdef DEBUG_QUERY_IFS
+ _pr_PrintIfreq(ifr);
+#endif
+ sa = &ifr->ifr_addr;
+ if (sa->sa_family == AF_INET) {
+ struct sockaddr_in *sin = (struct sockaddr_in *) sa;
+ if (sin->sin_addr.s_addr != htonl(INADDR_LOOPBACK)) {
+ _pr_have_inet_if = PR_TRUE;
+ }
+ } else if (sa->sa_family == AF_INET6) {
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) sa;
+ if (!IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)
+ && !IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
+ _pr_have_inet6_if = PR_TRUE;
+ }
+ }
+
+#ifdef _PR_HAVE_SOCKADDR_LEN
+ sa_len = PR_MAX(sa->sa_len, sizeof(struct sockaddr));
+#else
+ switch (sa->sa_family) {
+#ifdef AF_LINK
+ case AF_LINK:
+ sa_len = sizeof(struct sockaddr_dl);
+ break;
+#endif
+ case AF_INET6:
+ sa_len = sizeof(struct sockaddr_in6);
+ break;
+ default:
+ sa_len = sizeof(struct sockaddr);
+ break;
+ }
+#endif
+ ifr = (struct ifreq *)(((char *)sa) + sa_len);
+ }
+ PR_Free(buf);
+}
+
+#elif (defined(DARWIN) && defined(HAVE_GETIFADDRS)) || defined(FREEBSD) \
+ || defined(NETBSD) || defined(OPENBSD)
+
+/*
+ * Use the BSD getifaddrs function.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <ifaddrs.h>
+#include <netinet/in.h>
+
+#ifdef DEBUG_QUERY_IFS
+static void
+_pr_PrintIfaddrs(struct ifaddrs *ifa)
+{
+ struct sockaddr *sa;
+ const char* family;
+ void *addrp;
+ char addrstr[64];
+
+ sa = ifa->ifa_addr;
+ if (sa->sa_family == AF_INET) {
+ struct sockaddr_in *sin = (struct sockaddr_in *)sa;
+ family = "inet";
+ addrp = &sin->sin_addr;
+ } else if (sa->sa_family == AF_INET6) {
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
+ family = "inet6";
+ addrp = &sin6->sin6_addr;
+ } else {
+ return; /* skip if not AF_INET or AF_INET6 */
+ }
+ inet_ntop(sa->sa_family, addrp, addrstr, sizeof(addrstr));
+ printf("%s: %s %s\n", ifa->ifa_name, family, addrstr);
+}
+#endif
+
+static void
+_pr_QueryNetIfs(void)
+{
+ struct ifaddrs *ifp;
+ struct ifaddrs *ifa;
+
+ if (getifaddrs(&ifp) == -1) {
+ return;
+ }
+ for (ifa = ifp; ifa; ifa = ifa->ifa_next) {
+ struct sockaddr *sa;
+
+#ifdef DEBUG_QUERY_IFS
+ _pr_PrintIfaddrs(ifa);
+#endif
+ sa = ifa->ifa_addr;
+ if (sa->sa_family == AF_INET) {
+ struct sockaddr_in *sin = (struct sockaddr_in *) sa;
+ if (sin->sin_addr.s_addr != htonl(INADDR_LOOPBACK)) {
+ _pr_have_inet_if = 1;
+ }
+ } else if (sa->sa_family == AF_INET6) {
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) sa;
+ if (!IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)
+ && !IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
+ _pr_have_inet6_if = 1;
+ }
+ }
+ }
+ freeifaddrs(ifp);
+}
+
+#else /* default */
+
+/*
+ * Emulate the code in NSPR 4.2 or older. PR_GetIPNodeByName behaves
+ * as if the system had both IPv4 and IPv6 source addresses configured.
+ */
+static void
+_pr_QueryNetIfs(void)
+{
+ _pr_have_inet_if = PR_TRUE;
+ _pr_have_inet6_if = PR_TRUE;
+}
+
+#endif
+
+#endif /* _PR_INET6 && _PR_HAVE_GETHOSTBYNAME2 */
+
+void _PR_InitNet(void)
+{
+#if defined(XP_UNIX)
+#ifdef HAVE_NETCONFIG
+ /*
+ * This one-liner prevents the endless re-open's and re-read's of
+ * /etc/netconfig on EACH and EVERY call to accept(), connect(), etc.
+ */
+ (void)setnetconfig();
+#endif
+#endif
+#if !defined(_PR_NO_DNS_LOCK)
+ _pr_dnsLock = PR_NewLock();
+#endif
+#if !defined(_PR_HAVE_GETPROTO_R)
+ _getproto_lock = PR_NewLock();
+#endif
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETHOSTBYNAME2)
+ _pr_query_ifs_lock = PR_NewLock();
+#endif
+}
+
+void _PR_CleanupNet(void)
+{
+#if !defined(_PR_NO_DNS_LOCK)
+ if (_pr_dnsLock) {
+ PR_DestroyLock(_pr_dnsLock);
+ _pr_dnsLock = NULL;
+ }
+#endif
+#if !defined(_PR_HAVE_GETPROTO_R)
+ if (_getproto_lock) {
+ PR_DestroyLock(_getproto_lock);
+ _getproto_lock = NULL;
+ }
+#endif
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETHOSTBYNAME2)
+ if (_pr_query_ifs_lock) {
+ PR_DestroyLock(_pr_query_ifs_lock);
+ _pr_query_ifs_lock = NULL;
+ }
+#endif
+}
+
+/*
+** Allocate space from the buffer, aligning it to "align" before doing
+** the allocation. "align" must be a power of 2.
+*/
+static char *Alloc(PRIntn amount, char **bufp, PRIntn *buflenp, PRIntn align)
+{
+ char *buf = *bufp;
+ PRIntn buflen = *buflenp;
+
+ if (align && ((long)buf & (align - 1))) {
+ PRIntn skip = align - ((ptrdiff_t)buf & (align - 1));
+ if (buflen < skip) {
+ return 0;
+ }
+ buf += skip;
+ buflen -= skip;
+ }
+ if (buflen < amount) {
+ return 0;
+ }
+ *bufp = buf + amount;
+ *buflenp = buflen - amount;
+ return buf;
+}
+
+typedef enum _PRIPAddrConversion {
+ _PRIPAddrNoConversion,
+ _PRIPAddrIPv4Mapped,
+ _PRIPAddrIPv4Compat
+} _PRIPAddrConversion;
+
+/*
+** Convert an IPv4 address (v4) to an IPv4-mapped IPv6 address (v6).
+*/
+static void MakeIPv4MappedAddr(const char *v4, char *v6)
+{
+ memset(v6, 0, 10);
+ memset(v6 + 10, 0xff, 2);
+ memcpy(v6 + 12, v4, 4);
+}
+
+/*
+** Convert an IPv4 address (v4) to an IPv4-compatible IPv6 address (v6).
+*/
+static void MakeIPv4CompatAddr(const char *v4, char *v6)
+{
+ memset(v6, 0, 12);
+ memcpy(v6 + 12, v4, 4);
+}
+
+/*
+** Copy a hostent, and all of the memory that it refers to into
+** (hopefully) stacked buffers.
+*/
+static PRStatus CopyHostent(
+ struct hostent *from,
+ char **buf,
+ PRIntn *bufsize,
+ _PRIPAddrConversion conversion,
+ PRHostEnt *to)
+{
+ PRIntn len, na;
+ char **ap;
+
+ if (conversion != _PRIPAddrNoConversion
+ && from->h_addrtype == AF_INET) {
+ PR_ASSERT(from->h_length == 4);
+ to->h_addrtype = PR_AF_INET6;
+ to->h_length = 16;
+ } else {
+#if defined(_PR_INET6) || defined(_PR_INET6_PROBE)
+ if (AF_INET6 == from->h_addrtype)
+ to->h_addrtype = PR_AF_INET6;
+ else
+#endif
+ to->h_addrtype = from->h_addrtype;
+ to->h_length = from->h_length;
+ }
+
+ /* Copy the official name */
+ if (!from->h_name) return PR_FAILURE;
+ len = strlen(from->h_name) + 1;
+ to->h_name = Alloc(len, buf, bufsize, 0);
+ if (!to->h_name) return PR_FAILURE;
+ memcpy(to->h_name, from->h_name, len);
+
+ /* Count the aliases, then allocate storage for the pointers */
+ if (!from->h_aliases) {
+ na = 1;
+ } else {
+ for (na = 1, ap = from->h_aliases; *ap != 0; na++, ap++){;} /* nothing to execute */
+ }
+ to->h_aliases = (char**)Alloc(
+ na * sizeof(char*), buf, bufsize, sizeof(char**));
+ if (!to->h_aliases) return PR_FAILURE;
+
+ /* Copy the aliases, one at a time */
+ if (!from->h_aliases) {
+ to->h_aliases[0] = 0;
+ } else {
+ for (na = 0, ap = from->h_aliases; *ap != 0; na++, ap++) {
+ len = strlen(*ap) + 1;
+ to->h_aliases[na] = Alloc(len, buf, bufsize, 0);
+ if (!to->h_aliases[na]) return PR_FAILURE;
+ memcpy(to->h_aliases[na], *ap, len);
+ }
+ to->h_aliases[na] = 0;
+ }
+
+ /* Count the addresses, then allocate storage for the pointers */
+ for (na = 1, ap = from->h_addr_list; *ap != 0; na++, ap++){;} /* nothing to execute */
+ to->h_addr_list = (char**)Alloc(
+ na * sizeof(char*), buf, bufsize, sizeof(char**));
+ if (!to->h_addr_list) return PR_FAILURE;
+
+ /* Copy the addresses, one at a time */
+ for (na = 0, ap = from->h_addr_list; *ap != 0; na++, ap++) {
+ to->h_addr_list[na] = Alloc(to->h_length, buf, bufsize, 0);
+ if (!to->h_addr_list[na]) return PR_FAILURE;
+ if (conversion != _PRIPAddrNoConversion
+ && from->h_addrtype == AF_INET) {
+ if (conversion == _PRIPAddrIPv4Mapped) {
+ MakeIPv4MappedAddr(*ap, to->h_addr_list[na]);
+ } else {
+ PR_ASSERT(conversion == _PRIPAddrIPv4Compat);
+ MakeIPv4CompatAddr(*ap, to->h_addr_list[na]);
+ }
+ } else {
+ memcpy(to->h_addr_list[na], *ap, to->h_length);
+ }
+ }
+ to->h_addr_list[na] = 0;
+ return PR_SUCCESS;
+}
+
+#ifdef SYMBIAN
+/* Set p_aliases by hand because Symbian's getprotobyname() returns NULL. */
+static void AssignAliases(struct protoent *Protoent, char** aliases)
+{
+ if (NULL == Protoent->p_aliases) {
+ if (0 == strcmp(Protoent->p_name, "ip"))
+ aliases[0] = "IP";
+ else if (0 == strcmp(Protoent->p_name, "tcp"))
+ aliases[0] = "TCP";
+ else if (0 == strcmp(Protoent->p_name, "udp"))
+ aliases[0] = "UDP";
+ else
+ aliases[0] = "UNKNOWN";
+ aliases[1] = NULL;
+ Protoent->p_aliases = aliases;
+ }
+}
+#endif
+
+#if !defined(_PR_HAVE_GETPROTO_R)
+/*
+** Copy a protoent, and all of the memory that it refers to into
+** (hopefully) stacked buffers.
+*/
+static PRStatus CopyProtoent(
+ struct protoent *from, char *buf, PRIntn bufsize, PRProtoEnt *to)
+{
+ PRIntn len, na;
+ char **ap;
+
+ /* Do the easy stuff */
+ to->p_num = from->p_proto;
+
+ /* Copy the official name */
+ if (!from->p_name) return PR_FAILURE;
+ len = strlen(from->p_name) + 1;
+ to->p_name = Alloc(len, &buf, &bufsize, 0);
+ if (!to->p_name) return PR_FAILURE;
+ memcpy(to->p_name, from->p_name, len);
+
+ /* Count the aliases, then allocate storage for the pointers */
+ for (na = 1, ap = from->p_aliases; *ap != 0; na++, ap++){;} /* nothing to execute */
+ to->p_aliases = (char**)Alloc(
+ na * sizeof(char*), &buf, &bufsize, sizeof(char**));
+ if (!to->p_aliases) return PR_FAILURE;
+
+ /* Copy the aliases, one at a time */
+ for (na = 0, ap = from->p_aliases; *ap != 0; na++, ap++) {
+ len = strlen(*ap) + 1;
+ to->p_aliases[na] = Alloc(len, &buf, &bufsize, 0);
+ if (!to->p_aliases[na]) return PR_FAILURE;
+ memcpy(to->p_aliases[na], *ap, len);
+ }
+ to->p_aliases[na] = 0;
+
+ return PR_SUCCESS;
+}
+#endif /* !defined(_PR_HAVE_GETPROTO_R) */
+
+/*
+ * #################################################################
+ * NOTE: tmphe, tmpbuf, bufsize, h, and h_err are local variables
+ * or arguments of PR_GetHostByName, PR_GetIPNodeByName, and
+ * PR_GetHostByAddr. DO NOT CHANGE THE NAMES OF THESE LOCAL
+ * VARIABLES OR ARGUMENTS.
+ * #################################################################
+ */
+#if defined(_PR_HAVE_GETHOST_R_INT)
+
+#define GETHOSTBYNAME(name) \
+ (gethostbyname_r(name, &tmphe, tmpbuf, bufsize, &h, &h_err), h)
+#define GETHOSTBYNAME2(name, af) \
+ (gethostbyname2_r(name, af, &tmphe, tmpbuf, bufsize, &h, &h_err), h)
+#define GETHOSTBYADDR(addr, addrlen, af) \
+ (gethostbyaddr_r(addr, addrlen, af, \
+ &tmphe, tmpbuf, bufsize, &h, &h_err), h)
+
+#elif defined(_PR_HAVE_GETHOST_R_POINTER)
+
+#define GETHOSTBYNAME(name) \
+ gethostbyname_r(name, &tmphe, tmpbuf, bufsize, &h_err)
+#define GETHOSTBYNAME2(name, af) \
+ gethostbyname2_r(name, af, &tmphe, tmpbuf, bufsize, &h_err)
+#define GETHOSTBYADDR(addr, addrlen, af) \
+ gethostbyaddr_r(addr, addrlen, af, &tmphe, tmpbuf, bufsize, &h_err)
+
+#else
+
+#define GETHOSTBYNAME(name) gethostbyname(name)
+#define GETHOSTBYNAME2(name, af) gethostbyname2(name, af)
+#define GETHOSTBYADDR(addr, addrlen, af) gethostbyaddr(addr, addrlen, af)
+
+#endif /* definition of GETHOSTBYXXX */
+
+PR_IMPLEMENT(PRStatus) PR_GetHostByName(
+ const char *name, char *buf, PRIntn bufsize, PRHostEnt *hp)
+{
+ struct hostent *h;
+ PRStatus rv = PR_FAILURE;
+#if defined(_PR_HAVE_GETHOST_R)
+ char localbuf[PR_NETDB_BUF_SIZE];
+ char *tmpbuf;
+ struct hostent tmphe;
+ int h_err;
+#endif
+
+ if (!_pr_initialized) _PR_ImplicitInitialization();
+
+#if defined(_PR_HAVE_GETHOST_R)
+ tmpbuf = localbuf;
+ if (bufsize > sizeof(localbuf))
+ {
+ tmpbuf = (char *)PR_Malloc(bufsize);
+ if (NULL == tmpbuf)
+ {
+ PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+ return rv;
+ }
+ }
+#endif
+
+ LOCK_DNS();
+
+ h = GETHOSTBYNAME(name);
+
+ if (NULL == h)
+ {
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_GETHOST_ERRNO());
+ }
+ else
+ {
+ _PRIPAddrConversion conversion = _PRIPAddrNoConversion;
+ rv = CopyHostent(h, &buf, &bufsize, conversion, hp);
+ if (PR_SUCCESS != rv)
+ PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
+ }
+ UNLOCK_DNS();
+#if defined(_PR_HAVE_GETHOST_R)
+ if (tmpbuf != localbuf)
+ PR_Free(tmpbuf);
+#endif
+ return rv;
+}
+
+#if !defined(_PR_INET6) && \
+ defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYNAME)
+typedef struct hostent * (*_pr_getipnodebyname_t)(const char *, int,
+ int, int *);
+typedef struct hostent * (*_pr_getipnodebyaddr_t)(const void *, size_t,
+ int, int *);
+typedef void (*_pr_freehostent_t)(struct hostent *);
+static void * _pr_getipnodebyname_fp;
+static void * _pr_getipnodebyaddr_fp;
+static void * _pr_freehostent_fp;
+
+/*
+ * Look up the addresses of getipnodebyname, getipnodebyaddr,
+ * and freehostent.
+ */
+PRStatus
+_pr_find_getipnodebyname(void)
+{
+ PRLibrary *lib;
+ PRStatus rv;
+#define GETIPNODEBYNAME "getipnodebyname"
+#define GETIPNODEBYADDR "getipnodebyaddr"
+#define FREEHOSTENT "freehostent"
+
+ _pr_getipnodebyname_fp = PR_FindSymbolAndLibrary(GETIPNODEBYNAME, &lib);
+ if (NULL != _pr_getipnodebyname_fp) {
+ _pr_freehostent_fp = PR_FindSymbol(lib, FREEHOSTENT);
+ if (NULL != _pr_freehostent_fp) {
+ _pr_getipnodebyaddr_fp = PR_FindSymbol(lib, GETIPNODEBYADDR);
+ if (NULL != _pr_getipnodebyaddr_fp)
+ rv = PR_SUCCESS;
+ else
+ rv = PR_FAILURE;
+ } else
+ rv = PR_FAILURE;
+ (void)PR_UnloadLibrary(lib);
+ } else
+ rv = PR_FAILURE;
+ return rv;
+}
+#endif
+
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETHOSTBYNAME2)
+/*
+** Append the V4 addresses to the end of the list
+*/
+static PRStatus AppendV4AddrsToHostent(
+ struct hostent *from,
+ char **buf,
+ PRIntn *bufsize,
+ PRHostEnt *to)
+{
+ PRIntn na, na_old;
+ char **ap;
+ char **new_addr_list;
+
+ /* Count the addresses, then grow storage for the pointers */
+ for (na_old = 0, ap = to->h_addr_list; *ap != 0; na_old++, ap++)
+ {;} /* nothing to execute */
+ for (na = na_old + 1, ap = from->h_addr_list; *ap != 0; na++, ap++)
+ {;} /* nothing to execute */
+ new_addr_list = (char**)Alloc(
+ na * sizeof(char*), buf, bufsize, sizeof(char**));
+ if (!new_addr_list) return PR_FAILURE;
+
+ /* Copy the V6 addresses, one at a time */
+ for (na = 0, ap = to->h_addr_list; *ap != 0; na++, ap++) {
+ new_addr_list[na] = to->h_addr_list[na];
+ }
+ to->h_addr_list = new_addr_list;
+
+ /* Copy the V4 addresses, one at a time */
+ for (ap = from->h_addr_list; *ap != 0; na++, ap++) {
+ to->h_addr_list[na] = Alloc(to->h_length, buf, bufsize, 0);
+ if (!to->h_addr_list[na]) return PR_FAILURE;
+ MakeIPv4MappedAddr(*ap, to->h_addr_list[na]);
+ }
+ to->h_addr_list[na] = 0;
+ return PR_SUCCESS;
+}
+#endif
+
+PR_IMPLEMENT(PRStatus) PR_GetIPNodeByName(
+ const char *name, PRUint16 af, PRIntn flags,
+ char *buf, PRIntn bufsize, PRHostEnt *hp)
+{
+ struct hostent *h = 0;
+ PRStatus rv = PR_FAILURE;
+#if defined(_PR_HAVE_GETHOST_R)
+ char localbuf[PR_NETDB_BUF_SIZE];
+ char *tmpbuf;
+ struct hostent tmphe;
+ int h_err;
+#endif
+#if defined(_PR_HAVE_GETIPNODEBYNAME)
+ PRUint16 md_af = af;
+ int error_num;
+ int tmp_flags = 0;
+#endif
+#if defined(_PR_HAVE_GETHOSTBYNAME2)
+ PRBool did_af_inet = PR_FALSE;
+#endif
+
+ if (!_pr_initialized) _PR_ImplicitInitialization();
+
+ if (af != PR_AF_INET && af != PR_AF_INET6) {
+ PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+ return PR_FAILURE;
+ }
+
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETHOSTBYNAME2)
+ PR_Lock(_pr_query_ifs_lock);
+ /*
+ * Keep querying the presence of IPv4 and IPv6 interfaces until
+ * at least one is up. This allows us to detect the local
+ * machine going from offline to online.
+ */
+ if (!_pr_have_inet_if && !_pr_have_inet6_if) {
+ _pr_QueryNetIfs();
+#ifdef DEBUG_QUERY_IFS
+ if (_pr_have_inet_if)
+ printf("Have IPv4 source address\n");
+ if (_pr_have_inet6_if)
+ printf("Have IPv6 source address\n");
+#endif
+ }
+ PR_Unlock(_pr_query_ifs_lock);
+#endif
+
+#if defined(_PR_HAVE_GETIPNODEBYNAME)
+ if (flags & PR_AI_V4MAPPED)
+ tmp_flags |= AI_V4MAPPED;
+ if (flags & PR_AI_ADDRCONFIG)
+ tmp_flags |= AI_ADDRCONFIG;
+ if (flags & PR_AI_ALL)
+ tmp_flags |= AI_ALL;
+ if (af == PR_AF_INET6)
+ md_af = AF_INET6;
+ else
+ md_af = af;
+#endif
+
+#if defined(_PR_HAVE_GETHOST_R)
+ tmpbuf = localbuf;
+ if (bufsize > sizeof(localbuf))
+ {
+ tmpbuf = (char *)PR_Malloc(bufsize);
+ if (NULL == tmpbuf)
+ {
+ PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+ return rv;
+ }
+ }
+#endif
+
+ /* Do not need to lock the DNS lock if getipnodebyname() is called */
+#ifdef _PR_INET6
+#ifdef _PR_HAVE_GETHOSTBYNAME2
+ LOCK_DNS();
+ if (af == PR_AF_INET6)
+ {
+ if ((flags & PR_AI_ADDRCONFIG) == 0 || _pr_have_inet6_if)
+ {
+#ifdef _PR_INET6_PROBE
+ if (_pr_ipv6_is_present())
+#endif
+ h = GETHOSTBYNAME2(name, AF_INET6);
+ }
+ if ((NULL == h) && (flags & PR_AI_V4MAPPED)
+ && ((flags & PR_AI_ADDRCONFIG) == 0 || _pr_have_inet_if))
+ {
+ did_af_inet = PR_TRUE;
+ h = GETHOSTBYNAME2(name, AF_INET);
+ }
+ }
+ else
+ {
+ if ((flags & PR_AI_ADDRCONFIG) == 0 || _pr_have_inet_if)
+ {
+ did_af_inet = PR_TRUE;
+ h = GETHOSTBYNAME2(name, af);
+ }
+ }
+#elif defined(_PR_HAVE_GETIPNODEBYNAME)
+ h = getipnodebyname(name, md_af, tmp_flags, &error_num);
+#else
+#error "Unknown name-to-address translation function"
+#endif /* _PR_HAVE_GETHOSTBYNAME2 */
+#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYNAME)
+ if (_pr_ipv6_is_present())
+ {
+#ifdef PR_GETIPNODE_NOT_THREADSAFE
+ LOCK_DNS();
+#endif
+ h = (*((_pr_getipnodebyname_t)_pr_getipnodebyname_fp))(name, md_af, tmp_flags, &error_num);
+ }
+ else
+ {
+ LOCK_DNS();
+ h = GETHOSTBYNAME(name);
+ }
+#else /* _PR_INET6 */
+ LOCK_DNS();
+ h = GETHOSTBYNAME(name);
+#endif /* _PR_INET6 */
+
+ if (NULL == h)
+ {
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETIPNODEBYNAME)
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, error_num);
+#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYNAME)
+ if (_pr_ipv6_is_present())
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, error_num);
+ else
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_GETHOST_ERRNO());
+#else
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_GETHOST_ERRNO());
+#endif
+ }
+ else
+ {
+ _PRIPAddrConversion conversion = _PRIPAddrNoConversion;
+
+ if (af == PR_AF_INET6) conversion = _PRIPAddrIPv4Mapped;
+ rv = CopyHostent(h, &buf, &bufsize, conversion, hp);
+ if (PR_SUCCESS != rv)
+ PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETIPNODEBYNAME)
+ freehostent(h);
+#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYNAME)
+ if (_pr_ipv6_is_present())
+ (*((_pr_freehostent_t)_pr_freehostent_fp))(h);
+#endif
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETHOSTBYNAME2)
+ if ((PR_SUCCESS == rv) && (flags & PR_AI_V4MAPPED)
+ && ((flags & PR_AI_ALL)
+ || ((flags & PR_AI_ADDRCONFIG) && _pr_have_inet_if))
+ && !did_af_inet && (h = GETHOSTBYNAME2(name, AF_INET)) != 0) {
+ rv = AppendV4AddrsToHostent(h, &buf, &bufsize, hp);
+ if (PR_SUCCESS != rv)
+ PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
+ }
+#endif
+ }
+
+ /* Must match the convoluted logic above for LOCK_DNS() */
+#ifdef _PR_INET6
+#ifdef _PR_HAVE_GETHOSTBYNAME2
+ UNLOCK_DNS();
+#endif /* _PR_HAVE_GETHOSTBYNAME2 */
+#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYNAME)
+#ifdef PR_GETIPNODE_NOT_THREADSAFE
+ UNLOCK_DNS();
+#else
+ if (!_pr_ipv6_is_present())
+ UNLOCK_DNS();
+#endif
+#else /* _PR_INET6 */
+ UNLOCK_DNS();
+#endif /* _PR_INET6 */
+
+#if defined(_PR_HAVE_GETHOST_R)
+ if (tmpbuf != localbuf)
+ PR_Free(tmpbuf);
+#endif
+
+ return rv;
+}
+
+PR_IMPLEMENT(PRStatus) PR_GetHostByAddr(
+ const PRNetAddr *hostaddr, char *buf, PRIntn bufsize, PRHostEnt *hostentry)
+{
+ struct hostent *h;
+ PRStatus rv = PR_FAILURE;
+ const void *addr;
+ PRUint32 tmp_ip;
+ int addrlen;
+ PRInt32 af;
+#if defined(_PR_HAVE_GETHOST_R)
+ char localbuf[PR_NETDB_BUF_SIZE];
+ char *tmpbuf;
+ struct hostent tmphe;
+ int h_err;
+#endif
+#if defined(_PR_HAVE_GETIPNODEBYADDR)
+ int error_num;
+#endif
+
+ if (!_pr_initialized) _PR_ImplicitInitialization();
+
+ if (hostaddr->raw.family == PR_AF_INET6)
+ {
+#if defined(_PR_INET6_PROBE)
+ af = _pr_ipv6_is_present() ? AF_INET6 : AF_INET;
+#elif defined(_PR_INET6)
+ af = AF_INET6;
+#else
+ af = AF_INET;
+#endif
+#if defined(_PR_GHBA_DISALLOW_V4MAPPED)
+ if (_PR_IN6_IS_ADDR_V4MAPPED(&hostaddr->ipv6.ip))
+ af = AF_INET;
+#endif
+ }
+ else
+ {
+ PR_ASSERT(hostaddr->raw.family == AF_INET);
+ af = AF_INET;
+ }
+ if (hostaddr->raw.family == PR_AF_INET6) {
+#if defined(_PR_INET6) || defined(_PR_INET6_PROBE)
+ if (af == AF_INET6) {
+ addr = &hostaddr->ipv6.ip;
+ addrlen = sizeof(hostaddr->ipv6.ip);
+ }
+ else
+#endif
+ {
+ PR_ASSERT(af == AF_INET);
+ if (!_PR_IN6_IS_ADDR_V4MAPPED(&hostaddr->ipv6.ip)) {
+ PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+ return rv;
+ }
+ tmp_ip = _PR_IN6_V4MAPPED_TO_IPADDR((PRIPv6Addr *)
+ &hostaddr->ipv6.ip);
+ addr = &tmp_ip;
+ addrlen = sizeof(tmp_ip);
+ }
+ } else {
+ PR_ASSERT(hostaddr->raw.family == AF_INET);
+ PR_ASSERT(af == AF_INET);
+ addr = &hostaddr->inet.ip;
+ addrlen = sizeof(hostaddr->inet.ip);
+ }
+
+#if defined(_PR_HAVE_GETHOST_R)
+ tmpbuf = localbuf;
+ if (bufsize > sizeof(localbuf))
+ {
+ tmpbuf = (char *)PR_Malloc(bufsize);
+ if (NULL == tmpbuf)
+ {
+ PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+ return rv;
+ }
+ }
+#endif
+
+ /* Do not need to lock the DNS lock if getipnodebyaddr() is called */
+#if defined(_PR_HAVE_GETIPNODEBYADDR) && defined(_PR_INET6)
+ h = getipnodebyaddr(addr, addrlen, af, &error_num);
+#elif defined(_PR_HAVE_GETIPNODEBYADDR) && defined(_PR_INET6_PROBE)
+ if (_pr_ipv6_is_present())
+ {
+#ifdef PR_GETIPNODE_NOT_THREADSAFE
+ LOCK_DNS();
+#endif
+ h = (*((_pr_getipnodebyaddr_t)_pr_getipnodebyaddr_fp))(addr, addrlen,
+ af, &error_num);
+ }
+ else
+ {
+ LOCK_DNS();
+ h = GETHOSTBYADDR(addr, addrlen, af);
+ }
+#else /* _PR_HAVE_GETIPNODEBYADDR */
+ LOCK_DNS();
+ h = GETHOSTBYADDR(addr, addrlen, af);
+#endif /* _PR_HAVE_GETIPNODEBYADDR */
+ if (NULL == h)
+ {
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETIPNODEBYADDR)
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, error_num);
+#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYADDR)
+ if (_pr_ipv6_is_present())
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, error_num);
+ else
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_GETHOST_ERRNO());
+#else
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_GETHOST_ERRNO());
+#endif
+ }
+ else
+ {
+ _PRIPAddrConversion conversion = _PRIPAddrNoConversion;
+ if (hostaddr->raw.family == PR_AF_INET6) {
+ if (af == AF_INET) {
+ if (_PR_IN6_IS_ADDR_V4MAPPED((PRIPv6Addr*)
+ &hostaddr->ipv6.ip)) {
+ conversion = _PRIPAddrIPv4Mapped;
+ } else if (_PR_IN6_IS_ADDR_V4COMPAT((PRIPv6Addr *)
+ &hostaddr->ipv6.ip)) {
+ conversion = _PRIPAddrIPv4Compat;
+ }
+ }
+ }
+ rv = CopyHostent(h, &buf, &bufsize, conversion, hostentry);
+ if (PR_SUCCESS != rv) {
+ PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
+ }
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETIPNODEBYADDR)
+ freehostent(h);
+#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYADDR)
+ if (_pr_ipv6_is_present())
+ (*((_pr_freehostent_t)_pr_freehostent_fp))(h);
+#endif
+ }
+
+ /* Must match the convoluted logic above for LOCK_DNS() */
+#if defined(_PR_HAVE_GETIPNODEBYADDR) && defined(_PR_INET6)
+#elif defined(_PR_HAVE_GETIPNODEBYADDR) && defined(_PR_INET6_PROBE)
+#ifdef PR_GETIPNODE_NOT_THREADSAFE
+ UNLOCK_DNS();
+#else
+ if (!_pr_ipv6_is_present())
+ UNLOCK_DNS();
+#endif
+#else /* _PR_HAVE_GETIPNODEBYADDR */
+ UNLOCK_DNS();
+#endif /* _PR_HAVE_GETIPNODEBYADDR */
+
+#if defined(_PR_HAVE_GETHOST_R)
+ if (tmpbuf != localbuf)
+ PR_Free(tmpbuf);
+#endif
+
+ return rv;
+}
+
+/******************************************************************************/
+/*
+ * Some systems define a reentrant version of getprotobyname(). Too bad
+ * the signature isn't always the same. But hey, they tried. If there
+ * is such a definition, use it. Otherwise, grab a lock and do it here.
+ */
+/******************************************************************************/
+
+#if !defined(_PR_HAVE_GETPROTO_R)
+/*
+ * This may seem like a silly thing to do, but the compiler SHOULD
+ * complain if getprotobyname_r() is implemented on some system and
+ * we're not using it. For sure these signatures are different than
+ * any usable implementation.
+ */
+
+#if defined(ANDROID)
+/* Android's Bionic libc system includes prototypes for these in netdb.h,
+ * but doesn't actually include implementations. It uses the 5-arg form,
+ * so these functions end up not matching the prototype. So just rename
+ * them if not found.
+ */
+#define getprotobyname_r _pr_getprotobyname_r
+#define getprotobynumber_r _pr_getprotobynumber_r
+#endif
+
+static struct protoent *getprotobyname_r(const char* name)
+{
+ return getprotobyname(name);
+} /* getprotobyname_r */
+
+static struct protoent *getprotobynumber_r(PRInt32 number)
+{
+ return getprotobynumber(number);
+} /* getprotobynumber_r */
+
+#endif /* !defined(_PR_HAVE_GETPROTO_R) */
+
+PR_IMPLEMENT(PRStatus) PR_GetProtoByName(
+ const char* name, char* buffer, PRInt32 buflen, PRProtoEnt* result)
+{
+ PRStatus rv = PR_SUCCESS;
+#if defined(_PR_HAVE_GETPROTO_R)
+ struct protoent* res = (struct protoent*)result;
+#endif
+
+ if (!_pr_initialized) _PR_ImplicitInitialization();
+
+#if defined(_PR_HAVE_GETPROTO_R_INT)
+ {
+ /*
+ ** The protoent_data has a pointer as the first field.
+ ** That implies the buffer better be aligned, and char*
+ ** doesn't promise much.
+ */
+ PRUptrdiff aligned = (PRUptrdiff)buffer;
+ if (0 != (aligned & (sizeof(struct protoent_data*) - 1)))
+ {
+ aligned += sizeof(struct protoent_data*) - 1;
+ aligned &= ~(sizeof(struct protoent_data*) - 1);
+ buflen -= (aligned - (PRUptrdiff)buffer);
+ buffer = (char*)aligned;
+ }
+ }
+#endif /* defined(_PR_HAVE_GETPROTO_R_INT) */
+
+ if (PR_NETDB_BUF_SIZE > buflen)
+ {
+ PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+ return PR_FAILURE;
+ }
+
+#if defined(_PR_HAVE_GETPROTO_R_POINTER)
+ if (NULL == getprotobyname_r(name, res, buffer, buflen))
+ {
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
+ return PR_FAILURE;
+ }
+#elif defined(_PR_HAVE_GETPROTO_R_INT)
+ /*
+ ** The buffer needs to be zero'd, and it should be
+ ** at least the size of a struct protoent_data.
+ */
+ memset(buffer, 0, buflen);
+ if (-1 == getprotobyname_r(name, res, (struct protoent_data*)buffer))
+ {
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
+ return PR_FAILURE;
+ }
+#elif defined(_PR_HAVE_5_ARG_GETPROTO_R)
+ /* The 5th argument for getprotobyname_r() cannot be NULL */
+ if (-1 == getprotobyname_r(name, res, buffer, buflen, &res))
+ {
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
+ return PR_FAILURE;
+ }
+#else /* do it the hard way */
+ {
+ struct protoent *staticBuf;
+ PR_Lock(_getproto_lock);
+ staticBuf = getprotobyname_r(name);
+ if (NULL == staticBuf)
+ {
+ rv = PR_FAILURE;
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
+ }
+ else
+ {
+#if defined(SYMBIAN)
+ char* aliases[2];
+ AssignAliases(staticBuf, aliases);
+#endif
+ rv = CopyProtoent(staticBuf, buffer, buflen, result);
+ if (PR_FAILURE == rv)
+ PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
+ }
+ PR_Unlock(_getproto_lock);
+ }
+#endif /* all that */
+ return rv;
+}
+
+PR_IMPLEMENT(PRStatus) PR_GetProtoByNumber(
+ PRInt32 number, char* buffer, PRInt32 buflen, PRProtoEnt* result)
+{
+ PRStatus rv = PR_SUCCESS;
+#if defined(_PR_HAVE_GETPROTO_R)
+ struct protoent* res = (struct protoent*)result;
+#endif
+
+ if (!_pr_initialized) _PR_ImplicitInitialization();
+
+#if defined(_PR_HAVE_GETPROTO_R_INT)
+ {
+ /*
+ ** The protoent_data has a pointer as the first field.
+ ** That implies the buffer better be aligned, and char*
+ ** doesn't promise much.
+ */
+ PRUptrdiff aligned = (PRUptrdiff)buffer;
+ if (0 != (aligned & (sizeof(struct protoent_data*) - 1)))
+ {
+ aligned += sizeof(struct protoent_data*) - 1;
+ aligned &= ~(sizeof(struct protoent_data*) - 1);
+ buflen -= (aligned - (PRUptrdiff)buffer);
+ buffer = (char*)aligned;
+ }
+ }
+#endif /* defined(_PR_HAVE_GETPROTO_R_INT) */
+
+ if (PR_NETDB_BUF_SIZE > buflen)
+ {
+ PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+ return PR_FAILURE;
+ }
+
+#if defined(_PR_HAVE_GETPROTO_R_POINTER)
+ if (NULL == getprotobynumber_r(number, res, buffer, buflen))
+ {
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
+ return PR_FAILURE;
+ }
+
+#elif defined(_PR_HAVE_GETPROTO_R_INT)
+ /*
+ ** The buffer needs to be zero'd for these OS's.
+ */
+ memset(buffer, 0, buflen);
+ if (-1 == getprotobynumber_r(number, res, (struct protoent_data*)buffer))
+ {
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
+ return PR_FAILURE;
+ }
+#elif defined(_PR_HAVE_5_ARG_GETPROTO_R)
+ /* The 5th argument for getprotobynumber_r() cannot be NULL */
+ if (-1 == getprotobynumber_r(number, res, buffer, buflen, &res))
+ {
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
+ return PR_FAILURE;
+ }
+#else /* do it the hard way */
+ {
+ struct protoent *staticBuf;
+ PR_Lock(_getproto_lock);
+ staticBuf = getprotobynumber_r(number);
+ if (NULL == staticBuf)
+ {
+ rv = PR_FAILURE;
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
+ }
+ else
+ {
+#if defined(SYMBIAN)
+ char* aliases[2];
+ AssignAliases(staticBuf, aliases);
+#endif
+ rv = CopyProtoent(staticBuf, buffer, buflen, result);
+ if (PR_FAILURE == rv)
+ PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
+ }
+ PR_Unlock(_getproto_lock);
+ }
+#endif /* all that crap */
+ return rv;
+
+}
+
+PRUintn _PR_NetAddrSize(const PRNetAddr* addr)
+{
+ PRUintn addrsize;
+
+ /*
+ * RFC 2553 added a new field (sin6_scope_id) to
+ * struct sockaddr_in6. PRNetAddr's ipv6 member has a
+ * scope_id field to match the new field. In order to
+ * work with older implementations supporting RFC 2133,
+ * we take the size of struct sockaddr_in6 instead of
+ * addr->ipv6.
+ */
+ if (AF_INET == addr->raw.family)
+ addrsize = sizeof(addr->inet);
+ else if (PR_AF_INET6 == addr->raw.family)
+#if defined(_PR_INET6)
+ addrsize = sizeof(struct sockaddr_in6);
+#else
+ addrsize = sizeof(addr->ipv6);
+#endif
+#if defined(XP_UNIX) || defined(XP_OS2)
+ else if (AF_UNIX == addr->raw.family)
+ addrsize = sizeof(addr->local);
+#endif
+ else addrsize = 0;
+
+ return addrsize;
+} /* _PR_NetAddrSize */
+
+PR_IMPLEMENT(PRIntn) PR_EnumerateHostEnt(
+ PRIntn enumIndex, const PRHostEnt *hostEnt, PRUint16 port, PRNetAddr *address)
+{
+ void *addr = hostEnt->h_addr_list[enumIndex++];
+ memset(address, 0, sizeof(PRNetAddr));
+ if (NULL == addr) enumIndex = 0;
+ else
+ {
+ address->raw.family = hostEnt->h_addrtype;
+ if (PR_AF_INET6 == hostEnt->h_addrtype)
+ {
+ address->ipv6.port = htons(port);
+ address->ipv6.flowinfo = 0;
+ address->ipv6.scope_id = 0;
+ memcpy(&address->ipv6.ip, addr, hostEnt->h_length);
+ }
+ else
+ {
+ PR_ASSERT(AF_INET == hostEnt->h_addrtype);
+ address->inet.port = htons(port);
+ memcpy(&address->inet.ip, addr, hostEnt->h_length);
+ }
+ }
+ return enumIndex;
+} /* PR_EnumerateHostEnt */
+
+PR_IMPLEMENT(PRStatus) PR_InitializeNetAddr(
+ PRNetAddrValue val, PRUint16 port, PRNetAddr *addr)
+{
+ PRStatus rv = PR_SUCCESS;
+ if (!_pr_initialized) _PR_ImplicitInitialization();
+
+ if (val != PR_IpAddrNull) memset(addr, 0, sizeof(addr->inet));
+ addr->inet.family = AF_INET;
+ addr->inet.port = htons(port);
+ switch (val)
+ {
+ case PR_IpAddrNull:
+ break; /* don't overwrite the address */
+ case PR_IpAddrAny:
+ addr->inet.ip = htonl(INADDR_ANY);
+ break;
+ case PR_IpAddrLoopback:
+ addr->inet.ip = htonl(INADDR_LOOPBACK);
+ break;
+ default:
+ PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+ rv = PR_FAILURE;
+ }
+ return rv;
+} /* PR_InitializeNetAddr */
+
+PR_IMPLEMENT(PRStatus) PR_SetNetAddr(
+ PRNetAddrValue val, PRUint16 af, PRUint16 port, PRNetAddr *addr)
+{
+ PRStatus rv = PR_SUCCESS;
+ if (!_pr_initialized) _PR_ImplicitInitialization();
+
+ if (af == PR_AF_INET6)
+ {
+ if (val != PR_IpAddrNull) memset(addr, 0, sizeof(addr->ipv6));
+ addr->ipv6.family = af;
+ addr->ipv6.port = htons(port);
+ addr->ipv6.flowinfo = 0;
+ addr->ipv6.scope_id = 0;
+ switch (val)
+ {
+ case PR_IpAddrNull:
+ break; /* don't overwrite the address */
+ case PR_IpAddrAny:
+ addr->ipv6.ip = _pr_in6addr_any;
+ break;
+ case PR_IpAddrLoopback:
+ addr->ipv6.ip = _pr_in6addr_loopback;
+ break;
+ default:
+ PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+ rv = PR_FAILURE;
+ }
+ }
+ else
+ {
+ if (val != PR_IpAddrNull) memset(addr, 0, sizeof(addr->inet));
+ addr->inet.family = af;
+ addr->inet.port = htons(port);
+ switch (val)
+ {
+ case PR_IpAddrNull:
+ break; /* don't overwrite the address */
+ case PR_IpAddrAny:
+ addr->inet.ip = htonl(INADDR_ANY);
+ break;
+ case PR_IpAddrLoopback:
+ addr->inet.ip = htonl(INADDR_LOOPBACK);
+ break;
+ default:
+ PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+ rv = PR_FAILURE;
+ }
+ }
+ return rv;
+} /* PR_SetNetAddr */
+
+PR_IMPLEMENT(PRBool)
+PR_IsNetAddrType(const PRNetAddr *addr, PRNetAddrValue val)
+{
+ if (addr->raw.family == PR_AF_INET6) {
+ if (val == PR_IpAddrAny) {
+ if (_PR_IN6_IS_ADDR_UNSPECIFIED((PRIPv6Addr *)&addr->ipv6.ip)) {
+ return PR_TRUE;
+ } else if (_PR_IN6_IS_ADDR_V4MAPPED((PRIPv6Addr *)&addr->ipv6.ip)
+ && _PR_IN6_V4MAPPED_TO_IPADDR((PRIPv6Addr *)&addr->ipv6.ip)
+ == htonl(INADDR_ANY)) {
+ return PR_TRUE;
+ }
+ } else if (val == PR_IpAddrLoopback) {
+ if (_PR_IN6_IS_ADDR_LOOPBACK((PRIPv6Addr *)&addr->ipv6.ip)) {
+ return PR_TRUE;
+ } else if (_PR_IN6_IS_ADDR_V4MAPPED((PRIPv6Addr *)&addr->ipv6.ip)
+ && _PR_IN6_V4MAPPED_TO_IPADDR((PRIPv6Addr *)&addr->ipv6.ip)
+ == htonl(INADDR_LOOPBACK)) {
+ return PR_TRUE;
+ }
+ } else if (val == PR_IpAddrV4Mapped
+ && _PR_IN6_IS_ADDR_V4MAPPED((PRIPv6Addr *)&addr->ipv6.ip)) {
+ return PR_TRUE;
+ }
+ } else {
+ if (addr->raw.family == AF_INET) {
+ if (val == PR_IpAddrAny && addr->inet.ip == htonl(INADDR_ANY)) {
+ return PR_TRUE;
+ } else if (val == PR_IpAddrLoopback
+ && addr->inet.ip == htonl(INADDR_LOOPBACK)) {
+ return PR_TRUE;
+ }
+ }
+ }
+ return PR_FALSE;
+}
+
+extern int pr_inet_aton(const char *cp, PRUint32 *addr);
+
+#define XX 127
+static const unsigned char index_hex[256] = {
+ XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+ XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+ XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,XX,XX, XX,XX,XX,XX,
+ XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+ XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+ XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+ XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+ XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+ XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+ XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+ XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+ XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+ XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+ XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+ XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+};
+
+/*
+ * StringToV6Addr() returns 1 if the conversion succeeds,
+ * or 0 if the input is not a valid IPv6 address string.
+ * (Same as inet_pton(AF_INET6, string, addr).)
+ */
+static int StringToV6Addr(const char *string, PRIPv6Addr *addr)
+{
+ const unsigned char *s = (const unsigned char *)string;
+ int section = 0; /* index of the current section (a 16-bit
+ * piece of the address */
+ int double_colon = -1; /* index of the section after the first
+ * 16-bit group of zeros represented by
+ * the double colon */
+ unsigned int val;
+ int len;
+
+ /* Handle initial (double) colon */
+ if (*s == ':') {
+ if (s[1] != ':') return 0;
+ s += 2;
+ addr->pr_s6_addr16[0] = 0;
+ section = double_colon = 1;
+ }
+
+ while (*s) {
+ if (section == 8) return 0; /* too long */
+ if (*s == ':') {
+ if (double_colon != -1) return 0; /* two double colons */
+ addr->pr_s6_addr16[section++] = 0;
+ double_colon = section;
+ s++;
+ continue;
+ }
+ for (len = val = 0; len < 4 && index_hex[*s] != XX; len++) {
+ val = (val << 4) + index_hex[*s++];
+ }
+ if (*s == '.') {
+ if (len == 0) return 0; /* nothing between : and . */
+ break;
+ }
+ if (*s == ':') {
+ s++;
+ if (!*s) return 0; /* cannot end with single colon */
+ } else if (*s) {
+ return 0; /* bad character */
+ }
+ addr->pr_s6_addr16[section++] = htons((unsigned short)val);
+ }
+
+ if (*s == '.') {
+ /* Have a trailing v4 format address */
+ if (section > 6) return 0; /* not enough room */
+
+ /*
+ * The number before the '.' is decimal, but we parsed it
+ * as hex. That means it is in BCD. Check it for validity
+ * and convert it to binary.
+ */
+ if (val > 0x0255 || (val & 0xf0) > 0x90 || (val & 0xf) > 9) return 0;
+ val = (val >> 8) * 100 + ((val >> 4) & 0xf) * 10 + (val & 0xf);
+ addr->pr_s6_addr[2 * section] = val;
+
+ s++;
+ val = index_hex[*s++];
+ if (val > 9) return 0;
+ while (*s >= '0' && *s <= '9') {
+ val = val * 10 + *s++ - '0';
+ if (val > 255) return 0;
+ }
+ if (*s != '.') return 0; /* must have exactly 4 decimal numbers */
+ addr->pr_s6_addr[2 * section + 1] = val;
+ section++;
+
+ s++;
+ val = index_hex[*s++];
+ if (val > 9) return 0;
+ while (*s >= '0' && *s <= '9') {
+ val = val * 10 + *s++ - '0';
+ if (val > 255) return 0;
+ }
+ if (*s != '.') return 0; /* must have exactly 4 decimal numbers */
+ addr->pr_s6_addr[2 * section] = val;
+
+ s++;
+ val = index_hex[*s++];
+ if (val > 9) return 0;
+ while (*s >= '0' && *s <= '9') {
+ val = val * 10 + *s++ - '0';
+ if (val > 255) return 0;
+ }
+ if (*s) return 0; /* must have exactly 4 decimal numbers */
+ addr->pr_s6_addr[2 * section + 1] = val;
+ section++;
+ }
+
+ if (double_colon != -1) {
+ /* Stretch the double colon */
+ int tosection;
+ int ncopy = section - double_colon;
+ for (tosection = 7; ncopy--; tosection--) {
+ addr->pr_s6_addr16[tosection] =
+ addr->pr_s6_addr16[double_colon + ncopy];
+ }
+ while (tosection >= double_colon) {
+ addr->pr_s6_addr16[tosection--] = 0;
+ }
+ } else if (section != 8) {
+ return 0; /* too short */
+ }
+ return 1;
+}
+#undef XX
+
+#ifndef _PR_HAVE_INET_NTOP
+static const char *basis_hex = "0123456789abcdef";
+
+/*
+ * V6AddrToString() returns a pointer to the buffer containing
+ * the text string if the conversion succeeds, and NULL otherwise.
+ * (Same as inet_ntop(AF_INET6, addr, buf, size), except that errno
+ * is not set on failure.)
+ */
+static const char *V6AddrToString(
+ const PRIPv6Addr *addr, char *buf, PRUint32 size)
+{
+#define STUFF(c) do { \
+ if (!size--) return NULL; \
+ *buf++ = (c); \
+} while (0)
+
+ int double_colon = -1; /* index of the first 16-bit
+ * group of zeros represented
+ * by the double colon */
+ int double_colon_length = 1; /* use double colon only if
+ * there are two or more 16-bit
+ * groups of zeros */
+ int zero_length;
+ int section;
+ unsigned int val;
+ const char *bufcopy = buf;
+
+ /* Scan to find the placement of the double colon */
+ for (section = 0; section < 8; section++) {
+ if (addr->pr_s6_addr16[section] == 0) {
+ zero_length = 1;
+ section++;
+ while (section < 8 && addr->pr_s6_addr16[section] == 0) {
+ zero_length++;
+ section++;
+ }
+ /* Select the longest sequence of zeros */
+ if (zero_length > double_colon_length) {
+ double_colon = section - zero_length;
+ double_colon_length = zero_length;
+ }
+ }
+ }
+
+ /* Now start converting to a string */
+ section = 0;
+
+ if (double_colon == 0) {
+ if (double_colon_length == 6 ||
+ (double_colon_length == 5 && addr->pr_s6_addr16[5] == 0xffff)) {
+ /* ipv4 format address */
+ STUFF(':');
+ STUFF(':');
+ if (double_colon_length == 5) {
+ STUFF('f');
+ STUFF('f');
+ STUFF('f');
+ STUFF('f');
+ STUFF(':');
+ }
+ if (addr->pr_s6_addr[12] > 99) STUFF(addr->pr_s6_addr[12]/100 + '0');
+ if (addr->pr_s6_addr[12] > 9) STUFF((addr->pr_s6_addr[12]%100)/10 + '0');
+ STUFF(addr->pr_s6_addr[12]%10 + '0');
+ STUFF('.');
+ if (addr->pr_s6_addr[13] > 99) STUFF(addr->pr_s6_addr[13]/100 + '0');
+ if (addr->pr_s6_addr[13] > 9) STUFF((addr->pr_s6_addr[13]%100)/10 + '0');
+ STUFF(addr->pr_s6_addr[13]%10 + '0');
+ STUFF('.');
+ if (addr->pr_s6_addr[14] > 99) STUFF(addr->pr_s6_addr[14]/100 + '0');
+ if (addr->pr_s6_addr[14] > 9) STUFF((addr->pr_s6_addr[14]%100)/10 + '0');
+ STUFF(addr->pr_s6_addr[14]%10 + '0');
+ STUFF('.');
+ if (addr->pr_s6_addr[15] > 99) STUFF(addr->pr_s6_addr[15]/100 + '0');
+ if (addr->pr_s6_addr[15] > 9) STUFF((addr->pr_s6_addr[15]%100)/10 + '0');
+ STUFF(addr->pr_s6_addr[15]%10 + '0');
+ STUFF('\0');
+ return bufcopy;
+ }
+ }
+
+ while (section < 8) {
+ if (section == double_colon) {
+ STUFF(':');
+ STUFF(':');
+ section += double_colon_length;
+ continue;
+ }
+ val = ntohs(addr->pr_s6_addr16[section]);
+ if (val > 0xfff) {
+ STUFF(basis_hex[val >> 12]);
+ }
+ if (val > 0xff) {
+ STUFF(basis_hex[(val >> 8) & 0xf]);
+ }
+ if (val > 0xf) {
+ STUFF(basis_hex[(val >> 4) & 0xf]);
+ }
+ STUFF(basis_hex[val & 0xf]);
+ section++;
+ if (section < 8 && section != double_colon) STUFF(':');
+ }
+ STUFF('\0');
+ return bufcopy;
+#undef STUFF
+}
+#endif /* !_PR_HAVE_INET_NTOP */
+
+/*
+ * Convert an IPv4 addr to an (IPv4-mapped) IPv6 addr
+ */
+PR_IMPLEMENT(void) PR_ConvertIPv4AddrToIPv6(PRUint32 v4addr, PRIPv6Addr *v6addr)
+{
+ PRUint8 *dstp;
+ dstp = v6addr->pr_s6_addr;
+ memset(dstp, 0, 10);
+ memset(dstp + 10, 0xff, 2);
+ memcpy(dstp + 12,(char *) &v4addr, 4);
+}
+
+PR_IMPLEMENT(PRUint16) PR_ntohs(PRUint16 n) { return ntohs(n); }
+PR_IMPLEMENT(PRUint32) PR_ntohl(PRUint32 n) { return ntohl(n); }
+PR_IMPLEMENT(PRUint16) PR_htons(PRUint16 n) { return htons(n); }
+PR_IMPLEMENT(PRUint32) PR_htonl(PRUint32 n) { return htonl(n); }
+PR_IMPLEMENT(PRUint64) PR_ntohll(PRUint64 n)
+{
+#ifdef IS_BIG_ENDIAN
+ return n;
+#else
+ PRUint64 tmp;
+ PRUint32 hi, lo;
+ LL_L2UI(lo, n);
+ LL_SHR(tmp, n, 32);
+ LL_L2UI(hi, tmp);
+ hi = PR_ntohl(hi);
+ lo = PR_ntohl(lo);
+ LL_UI2L(n, lo);
+ LL_SHL(n, n, 32);
+ LL_UI2L(tmp, hi);
+ LL_ADD(n, n, tmp);
+ return n;
+#endif
+} /* ntohll */
+
+PR_IMPLEMENT(PRUint64) PR_htonll(PRUint64 n)
+{
+#ifdef IS_BIG_ENDIAN
+ return n;
+#else
+ PRUint64 tmp;
+ PRUint32 hi, lo;
+ LL_L2UI(lo, n);
+ LL_SHR(tmp, n, 32);
+ LL_L2UI(hi, tmp);
+ hi = htonl(hi);
+ lo = htonl(lo);
+ LL_UI2L(n, lo);
+ LL_SHL(n, n, 32);
+ LL_UI2L(tmp, hi);
+ LL_ADD(n, n, tmp);
+ return n;
+#endif
+} /* htonll */
+
+
+/*
+ * Implementation of PR_GetAddrInfoByName and friends
+ *
+ * Compile-time options:
+ *
+ * _PR_HAVE_GETADDRINFO Define this macro if the target system provides
+ * getaddrinfo. With this defined, NSPR will require
+ * getaddrinfo at run time. If this if not defined,
+ * then NSPR will attempt to dynamically resolve
+ * getaddrinfo, falling back to PR_GetHostByName if
+ * getaddrinfo does not exist on the target system.
+ *
+ * Since getaddrinfo is a relatively new system call on many systems,
+ * we are forced to dynamically resolve it at run time in most cases.
+ * The exception includes any system (such as Mac OS X) that is known to
+ * provide getaddrinfo in all versions that NSPR cares to support.
+ */
+
+#if defined(_PR_HAVE_GETADDRINFO)
+
+#if defined(_PR_INET6)
+
+typedef struct addrinfo PRADDRINFO;
+#define GETADDRINFO getaddrinfo
+#define FREEADDRINFO freeaddrinfo
+#define GETNAMEINFO getnameinfo
+
+#elif defined(_PR_INET6_PROBE)
+
+typedef struct addrinfo PRADDRINFO;
+
+/* getaddrinfo/freeaddrinfo/getnameinfo prototypes */
+#if defined(WIN32)
+#define FUNC_MODIFIER __stdcall
+#else
+#define FUNC_MODIFIER
+#endif
+typedef int (FUNC_MODIFIER * FN_GETADDRINFO)
+ (const char *nodename,
+ const char *servname,
+ const PRADDRINFO *hints,
+ PRADDRINFO **res);
+typedef int (FUNC_MODIFIER * FN_FREEADDRINFO)
+ (PRADDRINFO *ai);
+typedef int (FUNC_MODIFIER * FN_GETNAMEINFO)
+ (const struct sockaddr *addr, int addrlen,
+ char *host, int hostlen,
+ char *serv, int servlen, int flags);
+
+/* global state */
+static FN_GETADDRINFO _pr_getaddrinfo = NULL;
+static FN_FREEADDRINFO _pr_freeaddrinfo = NULL;
+static FN_GETNAMEINFO _pr_getnameinfo = NULL;
+
+#define GETADDRINFO_SYMBOL "getaddrinfo"
+#define FREEADDRINFO_SYMBOL "freeaddrinfo"
+#define GETNAMEINFO_SYMBOL "getnameinfo"
+
+PRStatus
+_pr_find_getaddrinfo(void)
+{
+ PRLibrary *lib;
+#ifdef WIN32
+ /*
+ * On windows, we need to search ws2_32.dll or wship6.dll
+ * (Microsoft IPv6 Technology Preview for Windows 2000) for
+ * getaddrinfo and freeaddrinfo. These libraries might not
+ * be loaded yet.
+ */
+ const char *libname[] = { "ws2_32.dll", "wship6.dll" };
+ int i;
+
+ for (i = 0; i < sizeof(libname)/sizeof(libname[0]); i++) {
+ lib = PR_LoadLibrary(libname[i]);
+ if (!lib) {
+ continue;
+ }
+ _pr_getaddrinfo = (FN_GETADDRINFO)
+ PR_FindFunctionSymbol(lib, GETADDRINFO_SYMBOL);
+ if (!_pr_getaddrinfo) {
+ PR_UnloadLibrary(lib);
+ continue;
+ }
+ _pr_freeaddrinfo = (FN_FREEADDRINFO)
+ PR_FindFunctionSymbol(lib, FREEADDRINFO_SYMBOL);
+ _pr_getnameinfo = (FN_GETNAMEINFO)
+ PR_FindFunctionSymbol(lib, GETNAMEINFO_SYMBOL);
+ if (!_pr_freeaddrinfo || !_pr_getnameinfo) {
+ PR_UnloadLibrary(lib);
+ continue;
+ }
+ /* Keep the library loaded. */
+ return PR_SUCCESS;
+ }
+ return PR_FAILURE;
+#else
+ /*
+ * Resolve getaddrinfo by searching all loaded libraries. Then
+ * search library containing getaddrinfo for freeaddrinfo.
+ */
+ _pr_getaddrinfo = (FN_GETADDRINFO)
+ PR_FindFunctionSymbolAndLibrary(GETADDRINFO_SYMBOL, &lib);
+ if (!_pr_getaddrinfo) {
+ return PR_FAILURE;
+ }
+ _pr_freeaddrinfo = (FN_FREEADDRINFO)
+ PR_FindFunctionSymbol(lib, FREEADDRINFO_SYMBOL);
+ _pr_getnameinfo = (FN_GETNAMEINFO)
+ PR_FindFunctionSymbol(lib, GETNAMEINFO_SYMBOL);
+ PR_UnloadLibrary(lib);
+ if (!_pr_freeaddrinfo || !_pr_getnameinfo) {
+ return PR_FAILURE;
+ }
+ return PR_SUCCESS;
+#endif
+}
+
+#define GETADDRINFO (*_pr_getaddrinfo)
+#define FREEADDRINFO (*_pr_freeaddrinfo)
+#define GETNAMEINFO (*_pr_getnameinfo)
+
+#endif /* _PR_INET6 */
+
+#endif /* _PR_HAVE_GETADDRINFO */
+
+#if !defined(_PR_HAVE_GETADDRINFO) || defined(_PR_INET6_PROBE)
+/*
+ * If getaddrinfo does not exist, then we will fall back on
+ * PR_GetHostByName, which requires that we allocate a buffer for the
+ * PRHostEnt data structure and its members.
+ */
+typedef struct PRAddrInfoFB {
+ char buf[PR_NETDB_BUF_SIZE];
+ PRHostEnt hostent;
+ PRBool has_cname;
+} PRAddrInfoFB;
+
+static PRAddrInfo *
+pr_GetAddrInfoByNameFB(const char *hostname,
+ PRUint16 af,
+ PRIntn flags)
+{
+ PRStatus rv;
+ PRAddrInfoFB *ai;
+ /* fallback on PR_GetHostByName */
+ ai = PR_NEW(PRAddrInfoFB);
+ if (!ai) {
+ PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+ return NULL;
+ }
+ rv = PR_GetHostByName(hostname, ai->buf, sizeof ai->buf, &ai->hostent);
+ if (rv == PR_FAILURE) {
+ PR_Free(ai);
+ return NULL;
+ }
+ ai->has_cname = !(flags & PR_AI_NOCANONNAME);
+
+ return (PRAddrInfo *) ai;
+}
+#endif /* !_PR_HAVE_GETADDRINFO || _PR_INET6_PROBE */
+
+PR_IMPLEMENT(PRAddrInfo *) PR_GetAddrInfoByName(const char *hostname,
+ PRUint16 af,
+ PRIntn flags)
+{
+ /* restrict input to supported values */
+ if ((af != PR_AF_INET && af != PR_AF_UNSPEC) ||
+ (flags & ~ PR_AI_NOCANONNAME) != PR_AI_ADDRCONFIG) {
+ PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+ return NULL;
+ }
+
+ if (!_pr_initialized) _PR_ImplicitInitialization();
+
+#if !defined(_PR_HAVE_GETADDRINFO)
+ return pr_GetAddrInfoByNameFB(hostname, af, flags);
+#else
+#if defined(_PR_INET6_PROBE)
+ if (!_pr_ipv6_is_present()) {
+ return pr_GetAddrInfoByNameFB(hostname, af, flags);
+ }
+#endif
+ {
+ PRADDRINFO *res, hints;
+ int rv;
+
+ /*
+ * we assume a RFC 2553 compliant getaddrinfo. this may at some
+ * point need to be customized as platforms begin to adopt the
+ * RFC 3493.
+ */
+
+ memset(&hints, 0, sizeof(hints));
+ if (!(flags & PR_AI_NOCANONNAME))
+ hints.ai_flags |= AI_CANONNAME;
+#ifdef AI_ADDRCONFIG
+ /*
+ * Propagate AI_ADDRCONFIG to the GETADDRINFO call if PR_AI_ADDRCONFIG
+ * is set.
+ *
+ * Need a workaround for loopback host addresses:
+ * The problem is that in glibc and Windows, AI_ADDRCONFIG applies the
+ * existence of an outgoing network interface to IP addresses of the
+ * loopback interface, due to a strict interpretation of the
+ * specification. For example, if a computer does not have any
+ * outgoing IPv6 network interface, but its loopback network interface
+ * supports IPv6, a getaddrinfo call on "localhost" with AI_ADDRCONFIG
+ * won't return the IPv6 loopback address "::1", because getaddrinfo
+ * thinks the computer cannot connect to any IPv6 destination,
+ * ignoring the remote vs. local/loopback distinction.
+ */
+ if ((flags & PR_AI_ADDRCONFIG) &&
+ strcmp(hostname, "localhost") != 0 &&
+ strcmp(hostname, "localhost.localdomain") != 0 &&
+ strcmp(hostname, "localhost6") != 0 &&
+ strcmp(hostname, "localhost6.localdomain6") != 0) {
+ hints.ai_flags |= AI_ADDRCONFIG;
+ }
+#endif
+ hints.ai_family = (af == PR_AF_INET) ? AF_INET : AF_UNSPEC;
+
+ /*
+ * it is important to select a socket type in the hints, otherwise we
+ * will get back repetitive entries: one for each socket type. since
+ * we do not expose ai_socktype through our API, it is okay to do this
+ * here. the application may still choose to create a socket of some
+ * other type.
+ */
+ hints.ai_socktype = SOCK_STREAM;
+
+ rv = GETADDRINFO(hostname, NULL, &hints, &res);
+#ifdef AI_ADDRCONFIG
+ if (rv == EAI_BADFLAGS && (hints.ai_flags & AI_ADDRCONFIG)) {
+ hints.ai_flags &= ~AI_ADDRCONFIG;
+ rv = GETADDRINFO(hostname, NULL, &hints, &res);
+ }
+#endif
+ if (rv == 0)
+ return (PRAddrInfo *) res;
+
+ PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, rv);
+ }
+ return NULL;
+#endif
+}
+
+PR_IMPLEMENT(void) PR_FreeAddrInfo(PRAddrInfo *ai)
+{
+#if defined(_PR_HAVE_GETADDRINFO)
+#if defined(_PR_INET6_PROBE)
+ if (!_pr_ipv6_is_present())
+ PR_Free((PRAddrInfoFB *) ai);
+ else
+#endif
+ FREEADDRINFO((PRADDRINFO *) ai);
+#else
+ PR_Free((PRAddrInfoFB *) ai);
+#endif
+}
+
+PR_IMPLEMENT(void *) PR_EnumerateAddrInfo(void *iterPtr,
+ const PRAddrInfo *base,
+ PRUint16 port,
+ PRNetAddr *result)
+{
+#if defined(_PR_HAVE_GETADDRINFO)
+ PRADDRINFO *ai;
+#if defined(_PR_INET6_PROBE)
+ if (!_pr_ipv6_is_present()) {
+ /* using PRAddrInfoFB */
+ PRIntn iter = (PRIntn)(PRPtrdiff) iterPtr;
+ iter = PR_EnumerateHostEnt(iter, &((PRAddrInfoFB *) base)->hostent, port, result);
+ if (iter < 0)
+ iter = 0;
+ return (void *)(PRPtrdiff) iter;
+ }
+#endif
+
+ if (iterPtr)
+ ai = ((PRADDRINFO *) iterPtr)->ai_next;
+ else
+ ai = (PRADDRINFO *) base;
+
+ while (ai && ai->ai_addrlen > sizeof(PRNetAddr))
+ ai = ai->ai_next;
+
+ if (ai) {
+ /* copy sockaddr to PRNetAddr */
+ memcpy(result, ai->ai_addr, ai->ai_addrlen);
+ result->raw.family = ai->ai_addr->sa_family;
+#ifdef _PR_INET6
+ if (AF_INET6 == result->raw.family)
+ result->raw.family = PR_AF_INET6;
+#endif
+ if (ai->ai_addrlen < sizeof(PRNetAddr))
+ memset(((char*)result)+ai->ai_addrlen, 0, sizeof(PRNetAddr) - ai->ai_addrlen);
+
+ if (result->raw.family == PR_AF_INET)
+ result->inet.port = htons(port);
+ else
+ result->ipv6.port = htons(port);
+ }
+
+ return ai;
+#else
+ /* using PRAddrInfoFB */
+ PRIntn iter = (PRIntn) iterPtr;
+ iter = PR_EnumerateHostEnt(iter, &((PRAddrInfoFB *) base)->hostent, port, result);
+ if (iter < 0)
+ iter = 0;
+ return (void *) iter;
+#endif
+}
+
+PR_IMPLEMENT(const char *) PR_GetCanonNameFromAddrInfo(const PRAddrInfo *ai)
+{
+#if defined(_PR_HAVE_GETADDRINFO)
+#if defined(_PR_INET6_PROBE)
+ if (!_pr_ipv6_is_present()) {
+ const PRAddrInfoFB *fb = (const PRAddrInfoFB *) ai;
+ return fb->has_cname ? fb->hostent.h_name : NULL;
+ }
+#endif
+ return ((const PRADDRINFO *) ai)->ai_canonname;
+#else
+ const PRAddrInfoFB *fb = (const PRAddrInfoFB *) ai;
+ return fb->has_cname ? fb->hostent.h_name : NULL;
+#endif
+}
+
+#if defined(_PR_HAVE_GETADDRINFO)
+static PRStatus pr_StringToNetAddrGAI(const char *string, PRNetAddr *addr)
+{
+ PRADDRINFO *res, hints;
+ int rv; /* 0 for success, or the error code EAI_xxx */
+ PRNetAddr laddr;
+ PRStatus status = PR_SUCCESS;
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_flags = AI_NUMERICHOST;
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+
+ rv = GETADDRINFO(string, NULL, &hints, &res);
+ if (rv != 0)
+ {
+ PR_SetError(PR_INVALID_ARGUMENT_ERROR, rv);
+ return PR_FAILURE;
+ }
+
+ /* pick up the first addr */
+ memcpy(&laddr, res->ai_addr, res->ai_addrlen);
+ if (AF_INET6 == res->ai_addr->sa_family)
+ {
+ addr->ipv6.family = PR_AF_INET6;
+ addr->ipv6.ip = laddr.ipv6.ip;
+ addr->ipv6.scope_id = laddr.ipv6.scope_id;
+ }
+ else if (AF_INET == res->ai_addr->sa_family)
+ {
+ addr->inet.family = PR_AF_INET;
+ addr->inet.ip = laddr.inet.ip;
+ }
+ else
+ {
+ PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+ status = PR_FAILURE;
+ }
+
+ FREEADDRINFO(res);
+ return status;
+}
+#endif /* _PR_HAVE_GETADDRINFO */
+
+static PRStatus pr_StringToNetAddrFB(const char *string, PRNetAddr *addr)
+{
+ PRIntn rv;
+
+ rv = pr_inet_aton(string, &addr->inet.ip);
+ if (1 == rv)
+ {
+ addr->raw.family = AF_INET;
+ return PR_SUCCESS;
+ }
+
+ PR_ASSERT(0 == rv);
+ /* clean up after the failed call */
+ memset(&addr->inet.ip, 0, sizeof(addr->inet.ip));
+
+ rv = StringToV6Addr(string, &addr->ipv6.ip);
+ if (1 == rv)
+ {
+ addr->raw.family = PR_AF_INET6;
+ return PR_SUCCESS;
+ }
+
+ PR_ASSERT(0 == rv);
+ PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+ return PR_FAILURE;
+}
+
+PR_IMPLEMENT(PRStatus) PR_StringToNetAddr(const char *string, PRNetAddr *addr)
+{
+ if (!_pr_initialized) _PR_ImplicitInitialization();
+
+ if (!addr || !string || !*string)
+ {
+ PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+ return PR_FAILURE;
+ }
+
+#if !defined(_PR_HAVE_GETADDRINFO)
+ return pr_StringToNetAddrFB(string, addr);
+#else
+ /*
+ * getaddrinfo with AI_NUMERICHOST is much slower than pr_inet_aton on some
+ * platforms, such as Mac OS X (bug 404399), Linux glibc 2.10 (bug 344809),
+ * and most likely others. So we only use it to convert literal IP addresses
+ * that contain IPv6 scope IDs, which pr_inet_aton cannot convert.
+ */
+ if (!strchr(string, '%'))
+ return pr_StringToNetAddrFB(string, addr);
+
+#if defined(_PR_INET6_PROBE)
+ if (!_pr_ipv6_is_present())
+ return pr_StringToNetAddrFB(string, addr);
+#endif
+
+ return pr_StringToNetAddrGAI(string, addr);
+#endif
+}
+
+#if defined(_PR_HAVE_GETADDRINFO)
+static PRStatus pr_NetAddrToStringGNI(
+ const PRNetAddr *addr, char *string, PRUint32 size)
+{
+ int addrlen;
+ const PRNetAddr *addrp = addr;
+#if defined(_PR_HAVE_SOCKADDR_LEN) || defined(_PR_INET6)
+ PRUint16 md_af = addr->raw.family;
+ PRNetAddr addrcopy;
+#endif
+ int rv; /* 0 for success, or the error code EAI_xxx */
+
+#ifdef _PR_INET6
+ if (addr->raw.family == PR_AF_INET6)
+ {
+ md_af = AF_INET6;
+#ifndef _PR_HAVE_SOCKADDR_LEN
+ addrcopy = *addr;
+ addrcopy.raw.family = md_af;
+ addrp = &addrcopy;
+#endif
+ }
+#endif
+
+ addrlen = PR_NETADDR_SIZE(addr);
+#ifdef _PR_HAVE_SOCKADDR_LEN
+ addrcopy = *addr;
+ ((struct sockaddr*)&addrcopy)->sa_len = addrlen;
+ ((struct sockaddr*)&addrcopy)->sa_family = md_af;
+ addrp = &addrcopy;
+#endif
+ rv = GETNAMEINFO((const struct sockaddr *)addrp, addrlen,
+ string, size, NULL, 0, NI_NUMERICHOST);
+ if (rv != 0)
+ {
+ PR_SetError(PR_INVALID_ARGUMENT_ERROR, rv);
+ return PR_FAILURE;
+ }
+ return PR_SUCCESS;
+}
+#endif /* _PR_HAVE_GETADDRINFO */
+
+#if !defined(_PR_HAVE_GETADDRINFO) || defined(_PR_INET6_PROBE)
+static PRStatus pr_NetAddrToStringFB(
+ const PRNetAddr *addr, char *string, PRUint32 size)
+{
+ if (PR_AF_INET6 == addr->raw.family)
+ {
+#if defined(_PR_HAVE_INET_NTOP)
+ if (NULL == inet_ntop(AF_INET6, &addr->ipv6.ip, string, size))
+#else
+ if (NULL == V6AddrToString(&addr->ipv6.ip, string, size))
+#endif
+ {
+ /* the size of the result buffer is inadequate */
+ PR_SetError(PR_BUFFER_OVERFLOW_ERROR, 0);
+ return PR_FAILURE;
+ }
+ }
+ else
+ {
+ if (size < 16) goto failed;
+ if (AF_INET != addr->raw.family) goto failed;
+ else
+ {
+ unsigned char *byte = (unsigned char*)&addr->inet.ip;
+ PR_snprintf(string, size, "%u.%u.%u.%u",
+ byte[0], byte[1], byte[2], byte[3]);
+ }
+ }
+
+ return PR_SUCCESS;
+
+failed:
+ PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+ return PR_FAILURE;
+
+} /* pr_NetAddrToStringFB */
+#endif /* !_PR_HAVE_GETADDRINFO || _PR_INET6_PROBE */
+
+PR_IMPLEMENT(PRStatus) PR_NetAddrToString(
+ const PRNetAddr *addr, char *string, PRUint32 size)
+{
+ if (!_pr_initialized) _PR_ImplicitInitialization();
+
+#if !defined(_PR_HAVE_GETADDRINFO)
+ return pr_NetAddrToStringFB(addr, string, size);
+#else
+#if defined(_PR_INET6_PROBE)
+ if (!_pr_ipv6_is_present())
+ return pr_NetAddrToStringFB(addr, string, size);
+#endif
+ return pr_NetAddrToStringGNI(addr, string, size);
+#endif
+} /* PR_NetAddrToString */