1 /* Get address information (partial implementation).
2 Copyright (C) 1997, 2001, 2002, 2004, 2005, 2006 Free Software Foundation, Inc.
3 Contributed by Simon Josefsson <simon@josefsson.org>.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software Foundation,
17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
23 #include "getaddrinfo.h"
26 # include <netinet/in.h>
38 #define _(String) gettext (String)
39 #define N_(String) String
41 #include "inet_ntop.h"
45 #if defined _WIN32 || defined __WIN32__
50 typedef int (WSAAPI *getaddrinfo_func) (const char*, const char*,
51 const struct addrinfo*,
53 typedef void (WSAAPI *freeaddrinfo_func) (struct addrinfo*);
54 typedef int (WSAAPI *getnameinfo_func) (const struct sockaddr*,
55 socklen_t, char*, DWORD,
58 static getaddrinfo_func getaddrinfo_ptr = NULL;
59 static freeaddrinfo_func freeaddrinfo_ptr = NULL;
60 static getnameinfo_func getnameinfo_ptr = NULL;
69 return getaddrinfo_ptr ? 1 : 0;
73 h = GetModuleHandle ("ws2_32.dll");
77 getaddrinfo_ptr = (getaddrinfo_func) GetProcAddress (h, "getaddrinfo");
78 freeaddrinfo_ptr = (freeaddrinfo_func) GetProcAddress (h, "freeaddrinfo");
79 getnameinfo_ptr = (getnameinfo_func) GetProcAddress (h, "getnameinfo");
82 /* If either is missing, something is odd. */
83 if (!getaddrinfo_ptr || !freeaddrinfo_ptr || !getnameinfo_ptr)
85 getaddrinfo_ptr = NULL;
86 freeaddrinfo_ptr = NULL;
87 getnameinfo_ptr = NULL;
96 validate_family (int family)
98 /* FIXME: Support more families. */
100 if (family == PF_INET)
104 if (family == PF_INET6)
107 if (family == PF_UNSPEC)
112 /* Translate name of a service location and/or a service name to set of
115 getaddrinfo (const char *restrict nodename,
116 const char *restrict servname,
117 const struct addrinfo *restrict hints,
118 struct addrinfo **restrict res)
120 struct addrinfo *tmp;
127 struct addrinfo addrinfo;
128 struct sockaddr_in6 sockaddr_in6;
133 struct addrinfo addrinfo;
134 struct sockaddr_in sockaddr_in;
140 return getaddrinfo_ptr (nodename, servname, hints, res);
143 if (hints && (hints->ai_flags & ~(AI_CANONNAME|AI_PASSIVE)))
144 /* FIXME: Support more flags. */
147 if (hints && !validate_family (hints->ai_family))
151 hints->ai_socktype != SOCK_STREAM && hints->ai_socktype != SOCK_DGRAM)
152 /* FIXME: Support other socktype. */
153 return EAI_SOCKTYPE; /* FIXME: Better return code? */
157 if (!(hints->ai_flags & AI_PASSIVE))
161 nodename = (hint->ai_family == AF_INET6) ? "::" : "0.0.0.0";
163 nodename = "0.0.0.0";
169 struct servent *se = NULL;
171 (hints && hints->ai_socktype == SOCK_DGRAM) ? "udp" : "tcp";
173 if (!(hints->ai_flags & AI_NUMERICSERV))
174 /* FIXME: Use getservbyname_r if available. */
175 se = getservbyname (servname, proto);
180 if (!(*servname >= '0' && *servname <= '9'))
182 port = strtoul (servname, &c, 10);
183 if (*c || port > 0xffff)
191 /* FIXME: Use gethostbyname_r if available. */
192 he = gethostbyname (nodename);
193 if (!he || he->h_addr_list[0] == NULL)
196 switch (he->h_addrtype)
200 size = sizeof (struct v6_pair);
206 size = sizeof (struct v4_pair);
214 storage = calloc (1, size);
218 switch (he->h_addrtype)
223 struct v6_pair *p = storage;
224 struct sockaddr_in6 *sinp = &p->sockaddr_in6;
228 sinp->sin6_port = port;
230 if (he->h_length != sizeof (sinp->sin6_addr))
233 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
236 memcpy (&sinp->sin6_addr, he->h_addr_list[0], sizeof sinp->sin6_addr);
238 tmp->ai_addr = (struct sockaddr *) sinp;
239 tmp->ai_addrlen = sizeof *sinp;
247 struct v4_pair *p = storage;
248 struct sockaddr_in *sinp = &p->sockaddr_in;
252 sinp->sin_port = port;
254 if (he->h_length != sizeof (sinp->sin_addr))
257 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
260 memcpy (&sinp->sin_addr, he->h_addr_list[0], sizeof sinp->sin_addr);
262 tmp->ai_addr = (struct sockaddr *) sinp;
263 tmp->ai_addrlen = sizeof *sinp;
273 if (hints && hints->ai_flags & AI_CANONNAME)
281 tmp->ai_canonname = strdup (cn);
282 if (!tmp->ai_canonname)
289 tmp->ai_protocol = (hints) ? hints->ai_protocol : 0;
290 tmp->ai_socktype = (hints) ? hints->ai_socktype : 0;
291 tmp->ai_addr->sa_family = he->h_addrtype;
292 tmp->ai_family = he->h_addrtype;
294 /* FIXME: If more than one address, create linked list of addrinfo's. */
301 /* Free `addrinfo' structure AI including associated storage. */
303 freeaddrinfo (struct addrinfo *ai)
308 freeaddrinfo_ptr (ai);
315 struct addrinfo *cur;
320 if (cur->ai_canonname) free (cur->ai_canonname);
325 int getnameinfo(const struct sockaddr *restrict sa, socklen_t salen,
326 char *restrict node, socklen_t nodelen,
327 char *restrict service, socklen_t servicelen,
332 return getnameinfo_ptr (sa, salen, node, nodelen,
333 service, servicelen, flags);
336 /* FIXME: Support other flags. */
337 if ((node && nodelen > 0 && !(flags & NI_NUMERICHOST)) ||
338 (service && servicelen > 0 && !(flags & NI_NUMERICHOST)) ||
339 (flags & ~(NI_NUMERICHOST|NI_NUMERICSERV)))
342 if (sa == NULL || salen < sizeof (sa->sa_family))
345 switch (sa->sa_family)
349 if (salen < sizeof (struct sockaddr_in))
355 if (salen < sizeof (struct sockaddr_in6))
363 if (node && nodelen > 0 && flags & NI_NUMERICHOST)
365 switch (sa->sa_family)
369 if (!inet_ntop (AF_INET,
370 &(((const struct sockaddr_in *) sa)->sin_addr),
378 if (!inet_ntop (AF_INET6,
379 &(((const struct sockaddr_in6 *) sa)->sin6_addr),
390 if (service && servicelen > 0 && flags & NI_NUMERICSERV)
391 switch (sa->sa_family)
399 if (snprintf (service, servicelen, "%d",
400 ntohs (((const struct sockaddr_in *) sa)->sin_port))