2 * Copyright (c) 1999 - 2001 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 RCSID("$Id: getaddrinfo.c,v 1.12 2001/08/17 13:06:57 joda Exp $");
42 * uses hints->ai_socktype and hints->ai_protocol
46 get_port_protocol_socktype (const char *servname,
47 const struct addrinfo *hints,
53 const char *proto_str = NULL;
57 if (hints != NULL && hints->ai_protocol != 0) {
58 struct protoent *protoent = getprotobynumber (hints->ai_protocol);
61 return EAI_SOCKTYPE; /* XXX */
63 proto_str = protoent->p_name;
64 *protocol = protoent->p_proto;
68 *socktype = hints->ai_socktype;
70 if (*socktype == SOCK_STREAM) {
71 se = getservbyname (servname, proto_str ? proto_str : "tcp");
72 if (proto_str == NULL)
73 *protocol = IPPROTO_TCP;
74 } else if (*socktype == SOCK_DGRAM) {
75 se = getservbyname (servname, proto_str ? proto_str : "udp");
76 if (proto_str == NULL)
77 *protocol = IPPROTO_UDP;
78 } else if (*socktype == 0) {
79 if (proto_str != NULL) {
80 se = getservbyname (servname, proto_str);
82 se = getservbyname (servname, "tcp");
83 *protocol = IPPROTO_TCP;
84 *socktype = SOCK_STREAM;
86 se = getservbyname (servname, "udp");
87 *protocol = IPPROTO_UDP;
88 *socktype = SOCK_DGRAM;
97 *port = htons(strtol (servname, &endstr, 10));
98 if (servname == endstr)
107 add_one (int port, int protocol, int socktype,
108 struct addrinfo ***ptr,
109 int (*func)(struct addrinfo *, void *data, int port),
116 a = malloc (sizeof (*a));
119 memset (a, 0, sizeof(*a));
122 a->ai_protocol = protocol;
123 a->ai_socktype = socktype;
124 a->ai_canonname = canonname;
125 ret = (*func)(a, data, port);
136 const_v4 (struct addrinfo *a, void *data, int port)
138 struct sockaddr_in *sin;
139 struct in_addr *addr = (struct in_addr *)data;
141 a->ai_family = PF_INET;
142 a->ai_addrlen = sizeof(*sin);
143 a->ai_addr = malloc (sizeof(*sin));
144 if (a->ai_addr == NULL)
146 sin = (struct sockaddr_in *)a->ai_addr;
147 memset (sin, 0, sizeof(*sin));
148 sin->sin_family = AF_INET;
149 sin->sin_port = port;
150 sin->sin_addr = *addr;
156 const_v6 (struct addrinfo *a, void *data, int port)
158 struct sockaddr_in6 *sin6;
159 struct in6_addr *addr = (struct in6_addr *)data;
161 a->ai_family = PF_INET6;
162 a->ai_addrlen = sizeof(*sin6);
163 a->ai_addr = malloc (sizeof(*sin6));
164 if (a->ai_addr == NULL)
166 sin6 = (struct sockaddr_in6 *)a->ai_addr;
167 memset (sin6, 0, sizeof(*sin6));
168 sin6->sin6_family = AF_INET6;
169 sin6->sin6_port = port;
170 sin6->sin6_addr = *addr;
175 /* this is mostly a hack for some versions of AIX that has a prototype
176 for in6addr_loopback but no actual symbol in libc */
177 #if defined(HAVE_IPV6) && !defined(HAVE_IN6ADDR_LOOPBACK) && defined(IN6ADDR_LOOPBACK_INIT)
178 #define in6addr_loopback _roken_in6addr_loopback
179 struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
183 get_null (const struct addrinfo *hints,
184 int port, int protocol, int socktype,
185 struct addrinfo **res)
187 struct in_addr v4_addr;
189 struct in6_addr v6_addr;
191 struct addrinfo *first = NULL;
192 struct addrinfo **current = &first;
193 int family = PF_UNSPEC;
197 family = hints->ai_family;
199 if (hints && hints->ai_flags & AI_PASSIVE) {
200 v4_addr.s_addr = INADDR_ANY;
202 v6_addr = in6addr_any;
205 v4_addr.s_addr = htonl(INADDR_LOOPBACK);
207 v6_addr = in6addr_loopback;
212 if (family == PF_INET6 || family == PF_UNSPEC) {
213 ret = add_one (port, protocol, socktype,
214 ¤t, const_v6, &v6_addr, NULL);
217 if (family == PF_INET || family == PF_UNSPEC) {
218 ret = add_one (port, protocol, socktype,
219 ¤t, const_v4, &v4_addr, NULL);
226 add_hostent (int port, int protocol, int socktype,
227 struct addrinfo ***current,
228 int (*func)(struct addrinfo *, void *data, int port),
229 struct hostent *he, int *flags)
232 char *canonname = NULL;
235 if (*flags & AI_CANONNAME) {
236 struct hostent *he2 = NULL;
237 const char *tmp_canon;
239 tmp_canon = hostent_find_fqdn (he);
240 if (strchr (tmp_canon, '.') == NULL) {
243 he2 = getipnodebyaddr (he->h_addr_list[0], he->h_length,
244 he->h_addrtype, &error);
246 const char *tmp = hostent_find_fqdn (he2);
248 if (strchr (tmp, '.') != NULL)
253 canonname = strdup (tmp_canon);
256 if (canonname == NULL)
260 for (h = he->h_addr_list; *h != NULL; ++h) {
261 ret = add_one (port, protocol, socktype,
262 current, func, *h, canonname);
265 if (*flags & AI_CANONNAME) {
266 *flags &= ~AI_CANONNAME;
274 get_number (const char *nodename,
275 const struct addrinfo *hints,
276 int port, int protocol, int socktype,
277 struct addrinfo **res)
279 struct addrinfo *first = NULL;
280 struct addrinfo **current = &first;
281 int family = PF_UNSPEC;
285 family = hints->ai_family;
289 if (family == PF_INET6 || family == PF_UNSPEC) {
290 struct in6_addr v6_addr;
292 if (inet_pton (PF_INET6, nodename, &v6_addr) == 1) {
293 ret = add_one (port, protocol, socktype,
294 ¤t, const_v6, &v6_addr, NULL);
300 if (family == PF_INET || family == PF_UNSPEC) {
301 struct in_addr v4_addr;
303 if (inet_pton (PF_INET, nodename, &v4_addr) == 1) {
304 ret = add_one (port, protocol, socktype,
305 ¤t, const_v4, &v4_addr, NULL);
314 get_nodes (const char *nodename,
315 const struct addrinfo *hints,
316 int port, int protocol, int socktype,
317 struct addrinfo **res)
319 struct addrinfo *first = NULL;
320 struct addrinfo **current = &first;
321 int family = PF_UNSPEC;
323 int ret = EAI_NONAME;
327 family = hints->ai_family;
328 flags = hints->ai_flags;
332 if (family == PF_INET6 || family == PF_UNSPEC) {
335 he = getipnodebyname (nodename, PF_INET6, 0, &error);
338 ret = add_hostent (port, protocol, socktype,
339 ¤t, const_v6, he, &flags);
344 if (family == PF_INET || family == PF_UNSPEC) {
347 he = getipnodebyname (nodename, PF_INET, 0, &error);
350 ret = add_hostent (port, protocol, socktype,
351 ¤t, const_v4, he, &flags);
372 getaddrinfo(const char *nodename,
373 const char *servname,
374 const struct addrinfo *hints,
375 struct addrinfo **res)
384 if (servname == NULL && nodename == NULL)
388 && hints->ai_family != PF_UNSPEC
389 && hints->ai_family != PF_INET
391 && hints->ai_family != PF_INET6
396 if (servname != NULL) {
397 ret = get_port_protocol_socktype (servname, hints,
398 &port, &protocol, &socktype);
402 if (nodename != NULL) {
403 ret = get_number (nodename, hints, port, protocol, socktype, res);
405 if(hints && hints->ai_flags & AI_NUMERICHOST)
408 ret = get_nodes (nodename, hints, port, protocol, socktype,
412 ret = get_null (hints, port, protocol, socktype, res);