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
44 typedef void WSAAPI (*freeaddrinfo_func) (struct addrinfo*);
45 typedef int WSAAPI (*getaddrinfo_func) (const char*, const char*,
46 const struct addrinfo*,
48 typedef int WSAAPI (*getnameinfo_func) (const struct sockaddr*,
49 socklen_t, char*, DWORD,
52 static getaddrinfo_func getaddrinfo_ptr = NULL;
53 static freeaddrinfo_func freeaddrinfo_ptr = NULL;
54 static getnameinfo_func getnameinfo_ptr = NULL;
56 int use_win32_p (void)
62 return getaddrinfo_ptr ? 1 : 0;
66 h = GetModuleHandle ("ws2_32.dll");
70 getaddrinfo_ptr = GetProcAddress (h, "getaddrinfo");
71 freeaddrinfo_ptr = GetProcAddress (h, "freeaddrinfo");
72 getnameinfo_ptr = GetProcAddress (h, "getnameinfo");
75 /* If either is missing, something is odd. */
76 if (!getaddrinfo_ptr || !freeaddrinfo_ptr || !getnameinfo_ptr)
78 getaddrinfo_ptr = NULL;
79 freeaddrinfo_ptr = NULL;
80 getnameinfo_ptr = NULL;
89 validate_family (int family)
91 /* FIXME: Support more families. */
93 if (family == PF_INET)
97 if (family == PF_INET6)
100 if (family == PF_UNSPEC)
105 /* Translate name of a service location and/or a service name to set of
108 getaddrinfo (const char *restrict nodename,
109 const char *restrict servname,
110 const struct addrinfo *restrict hints,
111 struct addrinfo **restrict res)
113 struct addrinfo *tmp;
120 struct addrinfo addrinfo;
121 struct sockaddr_in6 sockaddr_in6;
126 struct addrinfo addrinfo;
127 struct sockaddr_in sockaddr_in;
133 return getaddrinfo_ptr (nodename, servname, hints, res);
136 if (hints && (hints->ai_flags & ~AI_CANONNAME))
137 /* FIXME: Support more flags. */
140 if (hints && !validate_family (hints->ai_family))
144 hints->ai_socktype != SOCK_STREAM && hints->ai_socktype != SOCK_DGRAM)
145 /* FIXME: Support other socktype. */
146 return EAI_SOCKTYPE; /* FIXME: Better return code? */
149 /* FIXME: Support server bind mode. */
154 struct servent *se = NULL;
156 (hints && hints->ai_socktype == SOCK_DGRAM) ? "udp" : "tcp";
158 if (!(hints->ai_flags & AI_NUMERICSERV))
159 /* FIXME: Use getservbyname_r if available. */
160 se = getservbyname (servname, proto);
165 port = strtoul (servname, &c, 10);
174 /* FIXME: Use gethostbyname_r if available. */
175 he = gethostbyname (nodename);
176 if (!he || he->h_addr_list[0] == NULL)
179 switch (he->h_addrtype)
183 size = sizeof (struct v6_pair);
189 size = sizeof (struct v4_pair);
197 storage = calloc (1, size);
201 switch (he->h_addrtype)
206 struct v6_pair *p = storage;
207 struct sockaddr_in6 *sinp = &p->sockaddr_in6;
211 sinp->sin6_port = port;
213 if (he->h_length != sizeof (sinp->sin6_addr))
216 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
219 memcpy (&sinp->sin6_addr, he->h_addr_list[0], sizeof sinp->sin6_addr);
221 tmp->ai_addr = (struct sockaddr *) sinp;
222 tmp->ai_addrlen = sizeof *sinp;
230 struct v4_pair *p = storage;
231 struct sockaddr_in *sinp = &p->sockaddr_in;
235 sinp->sin_port = port;
237 if (he->h_length != sizeof (sinp->sin_addr))
240 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
243 memcpy (&sinp->sin_addr, he->h_addr_list[0], sizeof sinp->sin_addr);
245 tmp->ai_addr = (struct sockaddr *) sinp;
246 tmp->ai_addrlen = sizeof *sinp;
256 if (hints && hints->ai_flags & AI_CANONNAME)
264 tmp->ai_canonname = strdup (cn);
265 if (!tmp->ai_canonname)
272 tmp->ai_protocol = (hints) ? hints->ai_protocol : 0;
273 tmp->ai_socktype = (hints) ? hints->ai_socktype : 0;
274 tmp->ai_addr->sa_family = he->h_addrtype;
275 tmp->ai_family = he->h_addrtype;
277 /* FIXME: If more than one address, create linked list of addrinfo's. */
284 /* Free `addrinfo' structure AI including associated storage. */
286 freeaddrinfo (struct addrinfo *ai)
290 return freeaddrinfo_ptr (ai);
295 struct addrinfo *cur;
300 if (cur->ai_canonname) free (cur->ai_canonname);
305 int getnameinfo(const struct sockaddr *restrict sa, socklen_t salen,
306 char *restrict node, socklen_t nodelen,
307 char *restrict service, socklen_t servicelen,
312 return getnameinfo_ptr (sa, salen, node, nodelen,
313 service, servicelen, flags);
316 /* FIXME: Support other flags. */
317 if ((node && nodelen > 0 && !(flags & NI_NUMERICHOST)) ||
318 (service && servicelen > 0 && !(flags & NI_NUMERICHOST)) ||
319 (flags & ~(NI_NUMERICHOST|NI_NUMERICSERV)))
322 if (sa == NULL || salen < sizeof (sa->sa_family))
325 switch (sa->sa_family)
329 if (salen < sizeof (struct sockaddr_in))
335 if (salen < sizeof (struct sockaddr_in6))
343 if (node && nodelen > 0 && flags & NI_NUMERICHOST)
345 switch (sa->sa_family)
349 if (!inet_ntop (AF_INET,
351 &(((const struct sockaddr_in *) sa)->sin_addr),
359 if (!inet_ntop (AF_INET6,
361 &(((const struct sockaddr_in6 *) sa)->sin6_addr),
372 if (service && servicelen > 0 && flags & NI_NUMERICSERV)
373 switch (sa->sa_family)
381 if (snprintf (service, servicelen, "%d",
382 ntohs (((const struct sockaddr_in *) sa)->sin_port))