summaryrefslogtreecommitdiff
path: root/src/3rdparty/os2/getaddrinfo.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/3rdparty/os2/getaddrinfo.c')
-rw-r--r--src/3rdparty/os2/getaddrinfo.c299
1 files changed, 299 insertions, 0 deletions
diff --git a/src/3rdparty/os2/getaddrinfo.c b/src/3rdparty/os2/getaddrinfo.c
new file mode 100644
index 000000000..3cdda21f1
--- /dev/null
+++ b/src/3rdparty/os2/getaddrinfo.c
@@ -0,0 +1,299 @@
+/*
+ * This file is part of libESMTP, a library for submission of RFC 2822
+ * formatted electronic mail messages using the SMTP protocol described
+ * in RFC 2821.
+ *
+ * Copyright (C) 2001,2002 Brian Stafford <brian@stafford.uklinux.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/* An emulation of the RFC 2553 / Posix getaddrinfo resolver interface.
+ */
+
+#if !HAVE_GETADDRINFO
+
+/* Need to turn off Posix features in glibc to build this */
+#undef _POSIX_C_SOURCE
+#undef _XOPEN_SOURCE
+
+#include "getaddrinfo.h"
+//#include "compat/inet_pton.h"
+
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+static struct addrinfo *
+dup_addrinfo (struct addrinfo *info, void *addr, size_t addrlen) {
+ struct addrinfo *ret;
+
+ ret = malloc (sizeof (struct addrinfo));
+ if (ret == NULL)
+ return NULL;
+ memcpy (ret, info, sizeof (struct addrinfo));
+ ret->ai_addr = malloc (addrlen);
+ if (ret->ai_addr == NULL) {
+ free (ret);
+ return NULL;
+ }
+ memcpy (ret->ai_addr, addr, addrlen);
+ ret->ai_addrlen = addrlen;
+ return ret;
+}
+
+int
+getaddrinfo (const char *nodename, const char *servname,
+ const struct addrinfo *hints, struct addrinfo **res)
+{
+ struct hostent *hp;
+ struct servent *servent;
+ const char *socktype;
+ int port;
+ struct addrinfo hint, result;
+ struct addrinfo *ai, *sai, *eai;
+ char **addrs;
+
+ if (servname == NULL && nodename == NULL)
+ return EAI_NONAME;
+
+ memset (&result, 0, sizeof result);
+
+ /* default for hints */
+ if (hints == NULL) {
+ memset (&hint, 0, sizeof hint);
+ hint.ai_family = PF_UNSPEC;
+ hints = &hint;
+ }
+
+ if (servname == NULL)
+ port = 0;
+ else {
+ /* check for tcp or udp sockets only */
+ if (hints->ai_socktype == SOCK_STREAM)
+ socktype = "tcp";
+ else if (hints->ai_socktype == SOCK_DGRAM)
+ socktype = "udp";
+ else
+ return EAI_SERVICE;
+ result.ai_socktype = hints->ai_socktype;
+
+ /* Note: maintain port in host byte order to make debugging easier */
+ if (isdigit (*servname))
+ port = strtol (servname, NULL, 10);
+ else if ((servent = getservbyname (servname, socktype)) != NULL)
+ port = ntohs (servent->s_port);
+ else
+ return EAI_NONAME;
+ }
+
+ /* if nodename == NULL refer to the local host for a client or any
+ for a server */
+ if (nodename == NULL) {
+ struct sockaddr_in sin;
+
+ /* check protocol family is PF_UNSPEC or PF_INET - could try harder
+ for IPv6 but that's more code than I'm prepared to write */
+ if (hints->ai_family == PF_UNSPEC || hints->ai_family == PF_INET)
+ result.ai_family = AF_INET;
+ else
+ return EAI_FAMILY;
+
+ sin.sin_family = result.ai_family;
+ sin.sin_port = htons (port);
+ if (hints->ai_flags & AI_PASSIVE)
+ sin.sin_addr.s_addr = htonl (INADDR_ANY);
+ else
+ sin.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
+ /* Duplicate result and addr and return */
+ *res = dup_addrinfo (&result, &sin, sizeof sin);
+ return (*res == NULL) ? EAI_MEMORY : 0;
+ }
+
+ /* If AI_NUMERIC is specified, use inet_pton to translate numbers and
+ dots notation. */
+ if (hints->ai_flags & AI_NUMERICHOST) {
+ struct sockaddr_in sin;
+
+ /* check protocol family is PF_UNSPEC or PF_INET */
+ if (hints->ai_family == PF_UNSPEC || hints->ai_family == PF_INET)
+ result.ai_family = AF_INET;
+ else
+ return EAI_FAMILY;
+
+ sin.sin_family = result.ai_family;
+ sin.sin_port = htons (port);
+ if (inet_pton(result.ai_family, nodename, &sin.sin_addr)==0)
+ return EAI_NONAME;
+ sin.sin_addr.s_addr = inet_addr (nodename);
+ /* Duplicate result and addr and return */
+ *res = dup_addrinfo (&result, &sin, sizeof sin);
+ return (*res == NULL) ? EAI_MEMORY : 0;
+ }
+
+#if HAVE_H_ERRNO
+ h_errno = 0;
+#endif
+ errno = 0;
+ hp = gethostbyname(nodename);
+ if (hp == NULL) {
+#ifdef EAI_SYSTEM
+ if (errno != 0) {
+ return EAI_SYSTEM;
+ }
+#endif
+ switch (h_errno) {
+ case HOST_NOT_FOUND:
+ return EAI_NODATA;
+ case NO_DATA:
+ return EAI_NODATA;
+#if defined(NO_ADDRESS) && NO_ADDRESS != NO_DATA
+ case NO_ADDRESS:
+ return EAI_NODATA;
+#endif
+ case NO_RECOVERY:
+ return EAI_FAIL;
+ case TRY_AGAIN:
+ return EAI_AGAIN;
+ default:
+ return EAI_FAIL;
+ }
+ return EAI_FAIL;
+ }
+
+ /* Check that the address family is acceptable.
+ */
+ switch (hp->h_addrtype) {
+ case AF_INET:
+ if (!(hints->ai_family == PF_UNSPEC || hints->ai_family == PF_INET))
+ return EAI_FAMILY;
+ break;
+#ifndef __OS2__
+ case AF_INET6:
+ if (!(hints->ai_family == PF_UNSPEC || hints->ai_family == PF_INET6))
+ return EAI_FAMILY;
+ break;
+#endif
+ default:
+ return EAI_FAMILY;
+ }
+
+ /* For each element pointed to by hp, create an element in the
+ result linked list. */
+ sai = eai = NULL;
+ for (addrs = hp->h_addr_list; *addrs != NULL; addrs++) {
+ struct sockaddr sa;
+ size_t addrlen;
+
+ if (hp->h_length < 1)
+ continue;
+ sa.sa_family = hp->h_addrtype;
+ switch (hp->h_addrtype) {
+ case AF_INET:
+ ((struct sockaddr_in *) &sa)->sin_port = htons (port);
+ memcpy (&((struct sockaddr_in *) &sa)->sin_addr,
+ *addrs, hp->h_length);
+ addrlen = sizeof (struct sockaddr_in);
+ break;
+#ifndef __OS2__
+ case AF_INET6:
+#if SIN6_LEN
+ ((struct sockaddr_in6 *) &sa)->sin6_len = hp->h_length;
+#endif
+ ((struct sockaddr_in6 *) &sa)->sin6_port = htons (port);
+ memcpy (&((struct sockaddr_in6 *) &sa)->sin6_addr,
+ *addrs, hp->h_length);
+ addrlen = sizeof (struct sockaddr_in6);
+ break;
+#endif
+ default:
+ continue;
+ }
+
+ result.ai_family = hp->h_addrtype;
+ ai = dup_addrinfo (&result, &sa, addrlen);
+ if (ai == NULL) {
+ freeaddrinfo (sai);
+ return EAI_MEMORY;
+ }
+ if (sai == NULL)
+ sai = ai;
+ else
+ eai->ai_next = ai;
+ eai = ai;
+ }
+
+ if (sai == NULL) {
+ return EAI_NODATA;
+ }
+
+ if (hints->ai_flags & AI_CANONNAME) {
+ sai->ai_canonname = malloc (strlen (hp->h_name) + 1);
+ if (sai->ai_canonname == NULL) {
+ freeaddrinfo (sai);
+ return EAI_MEMORY;
+ }
+ strcpy (sai->ai_canonname, hp->h_name);
+ }
+
+ *res = sai;
+ return 0;
+}
+
+void
+freeaddrinfo (struct addrinfo *ai)
+{
+ struct addrinfo *next;
+
+ while (ai != NULL) {
+ next = ai->ai_next;
+ if (ai->ai_canonname != NULL)
+ free (ai->ai_canonname);
+ if (ai->ai_addr != NULL)
+ free (ai->ai_addr);
+ free (ai);
+ ai = next;
+ }
+}
+
+const char *
+gai_strerror (int ecode)
+{
+ static const char *eai_descr[] = {
+ "no error",
+ "address family for nodename not supported", /* EAI_ADDRFAMILY */
+ "temporary failure in name resolution", /* EAI_AGAIN */
+ "invalid value for ai_flags", /* EAI_BADFLAGS */
+ "non-recoverable failure in name resolution", /* EAI_FAIL */
+ "ai_family not supported", /* EAI_FAMILY */
+ "memory allocation failure", /* EAI_MEMORY */
+ "no address associated with nodename", /* EAI_NODATA */
+ "nodename nor servname provided, or not known", /* EAI_NONAME */
+ "servname not supported for ai_socktype", /* EAI_SERVICE */
+ "ai_socktype not supported", /* EAI_SOCKTYPE */
+ "system error returned in errno", /* EAI_SYSTEM */
+ "argument buffer overflow", /* EAI_OVERFLOW */
+ };
+
+ if (ecode < 0 || ecode > (int) (sizeof eai_descr/ sizeof eai_descr[0]))
+ return "unknown error";
+ return eai_descr[ecode];
+}
+
+#endif /* HAVE_GETADDRINFO */
generated by cgit v1.2.3-54-g00ecf (git 2.44.0) at 2024-06-29 19:20:44 +0000