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 = GetProcAddress (h, "getaddrinfo");
78 freeaddrinfo_ptr = GetProcAddress (h, "freeaddrinfo");
79 getnameinfo_ptr = 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))
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? */
156 /* FIXME: Support server bind mode. */
161 struct servent *se = NULL;
163 (hints && hints->ai_socktype == SOCK_DGRAM) ? "udp" : "tcp";
165 if (!(hints->ai_flags & AI_NUMERICSERV))
166 /* FIXME: Use getservbyname_r if available. */
167 se = getservbyname (servname, proto);
172 if (!(*servname >= '0' && *servname <= '9'))
174 port = strtoul (servname, &c, 10);
175 if (*c || port > 0xffff)
183 /* FIXME: Use gethostbyname_r if available. */
184 he = gethostbyname (nodename);
185 if (!he || he->h_addr_list[0] == NULL)
188 switch (he->h_addrtype)
192 size = sizeof (struct v6_pair);
198 size = sizeof (struct v4_pair);
206 storage = calloc (1, size);
210 switch (he->h_addrtype)
215 struct v6_pair *p = storage;
216 struct sockaddr_in6 *sinp = &p->sockaddr_in6;
220 sinp->sin6_port = port;
222 if (he->h_length != sizeof (sinp->sin6_addr))
225 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
228 memcpy (&sinp->sin6_addr, he->h_addr_list[0], sizeof sinp->sin6_addr);
230 tmp->ai_addr = (struct sockaddr *) sinp;
231 tmp->ai_addrlen = sizeof *sinp;
239 struct v4_pair *p = storage;
240 struct sockaddr_in *sinp = &p->sockaddr_in;
244 sinp->sin_port = port;
246 if (he->h_length != sizeof (sinp->sin_addr))
249 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
252 memcpy (&sinp->sin_addr, he->h_addr_list[0], sizeof sinp->sin_addr);
254 tmp->ai_addr = (struct sockaddr *) sinp;
255 tmp->ai_addrlen = sizeof *sinp;
265 if (hints && hints->ai_flags & AI_CANONNAME)
273 tmp->ai_canonname = strdup (cn);
274 if (!tmp->ai_canonname)
281 tmp->ai_protocol = (hints) ? hints->ai_protocol : 0;
282 tmp->ai_socktype = (hints) ? hints->ai_socktype : 0;
283 tmp->ai_addr->sa_family = he->h_addrtype;
284 tmp->ai_family = he->h_addrtype;
286 /* FIXME: If more than one address, create linked list of addrinfo's. */
293 /* Free `addrinfo' structure AI including associated storage. */
295 freeaddrinfo (struct addrinfo *ai)
299 return freeaddrinfo_ptr (ai);
304 struct addrinfo *cur;
309 if (cur->ai_canonname) free (cur->ai_canonname);
314 int getnameinfo(const struct sockaddr *restrict sa, socklen_t salen,
315 char *restrict node, socklen_t nodelen,
316 char *restrict service, socklen_t servicelen,
321 return getnameinfo_ptr (sa, salen, node, nodelen,
322 service, servicelen, flags);
325 /* FIXME: Support other flags. */
326 if ((node && nodelen > 0 && !(flags & NI_NUMERICHOST)) ||
327 (service && servicelen > 0 && !(flags & NI_NUMERICHOST)) ||
328 (flags & ~(NI_NUMERICHOST|NI_NUMERICSERV)))
331 if (sa == NULL || salen < sizeof (sa->sa_family))
334 switch (sa->sa_family)
338 if (salen < sizeof (struct sockaddr_in))
344 if (salen < sizeof (struct sockaddr_in6))
352 if (node && nodelen > 0 && flags & NI_NUMERICHOST)
354 switch (sa->sa_family)
358 if (!inet_ntop (AF_INET,
359 &(((const struct sockaddr_in *) sa)->sin_addr),
367 if (!inet_ntop (AF_INET6,
368 &(((const struct sockaddr_in6 *) sa)->sin6_addr),
379 if (service && servicelen > 0 && flags & NI_NUMERICSERV)
380 switch (sa->sa_family)
388 if (snprintf (service, servicelen, "%d",
389 ntohs (((const struct sockaddr_in *) sa)->sin_port))