1 /* Get address information (partial implementation).
2 Copyright (C) 1997, 2001-2002, 2004-2011 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. */
21 /* Don't use __attribute__ __nonnull__ in this compilation unit. Otherwise gcc
22 optimizes away the sa == NULL test below. */
23 #define _GL_ARG_NONNULL(params)
28 # include <netinet/in.h>
32 #include <arpa/inet.h>
37 /* Get memcpy, strdup. */
46 #define _(String) gettext (String)
47 #define N_(String) String
49 /* BeOS has AF_INET, but not PF_INET. */
51 # define PF_INET AF_INET
53 /* BeOS also lacks PF_UNSPEC. */
58 #if defined _WIN32 || defined __WIN32__
62 /* gl_sockets_startup */
66 typedef int (WSAAPI *getaddrinfo_func) (const char*, const char*,
67 const struct addrinfo*,
69 typedef void (WSAAPI *freeaddrinfo_func) (struct addrinfo*);
70 typedef int (WSAAPI *getnameinfo_func) (const struct sockaddr*,
71 socklen_t, char*, DWORD,
74 static getaddrinfo_func getaddrinfo_ptr = NULL;
75 static freeaddrinfo_func freeaddrinfo_ptr = NULL;
76 static getnameinfo_func getnameinfo_ptr = NULL;
85 return getaddrinfo_ptr ? 1 : 0;
89 h = GetModuleHandle ("ws2_32.dll");
93 getaddrinfo_ptr = (getaddrinfo_func) GetProcAddress (h, "getaddrinfo");
94 freeaddrinfo_ptr = (freeaddrinfo_func) GetProcAddress (h, "freeaddrinfo");
95 getnameinfo_ptr = (getnameinfo_func) GetProcAddress (h, "getnameinfo");
98 /* If either is missing, something is odd. */
99 if (!getaddrinfo_ptr || !freeaddrinfo_ptr || !getnameinfo_ptr)
101 getaddrinfo_ptr = NULL;
102 freeaddrinfo_ptr = NULL;
103 getnameinfo_ptr = NULL;
107 gl_sockets_startup (SOCKETS_1_1);
114 validate_family (int family)
116 /* FIXME: Support more families. */
118 if (family == PF_INET)
122 if (family == PF_INET6)
125 if (family == PF_UNSPEC)
130 /* Translate name of a service location and/or a service name to set of
133 getaddrinfo (const char *restrict nodename,
134 const char *restrict servname,
135 const struct addrinfo *restrict hints,
136 struct addrinfo **restrict res)
138 struct addrinfo *tmp;
145 struct addrinfo addrinfo;
146 struct sockaddr_in6 sockaddr_in6;
151 struct addrinfo addrinfo;
152 struct sockaddr_in sockaddr_in;
158 return getaddrinfo_ptr (nodename, servname, hints, res);
161 if (hints && (hints->ai_flags & ~(AI_CANONNAME|AI_PASSIVE)))
162 /* FIXME: Support more flags. */
165 if (hints && !validate_family (hints->ai_family))
169 hints->ai_socktype != SOCK_STREAM && hints->ai_socktype != SOCK_DGRAM)
170 /* FIXME: Support other socktype. */
171 return EAI_SOCKTYPE; /* FIXME: Better return code? */
175 if (!(hints->ai_flags & AI_PASSIVE))
179 nodename = (hints->ai_family == AF_INET6) ? "::" : "0.0.0.0";
181 nodename = "0.0.0.0";
187 struct servent *se = NULL;
189 (hints && hints->ai_socktype == SOCK_DGRAM) ? "udp" : "tcp";
191 if (hints == NULL || !(hints->ai_flags & AI_NUMERICSERV))
192 /* FIXME: Use getservbyname_r if available. */
193 se = getservbyname (servname, proto);
198 if (!(*servname >= '0' && *servname <= '9'))
200 port = strtoul (servname, &c, 10);
201 if (*c || port > 0xffff)
209 /* FIXME: Use gethostbyname_r if available. */
210 he = gethostbyname (nodename);
211 if (!he || he->h_addr_list[0] == NULL)
214 switch (he->h_addrtype)
218 size = sizeof (struct v6_pair);
224 size = sizeof (struct v4_pair);
232 storage = calloc (1, size);
236 switch (he->h_addrtype)
241 struct v6_pair *p = storage;
242 struct sockaddr_in6 *sinp = &p->sockaddr_in6;
246 sinp->sin6_port = port;
248 if (he->h_length != sizeof (sinp->sin6_addr))
251 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
254 memcpy (&sinp->sin6_addr, he->h_addr_list[0], sizeof sinp->sin6_addr);
256 tmp->ai_addr = (struct sockaddr *) sinp;
257 tmp->ai_addrlen = sizeof *sinp;
265 struct v4_pair *p = storage;
266 struct sockaddr_in *sinp = &p->sockaddr_in;
270 sinp->sin_port = port;
272 if (he->h_length != sizeof (sinp->sin_addr))
275 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
278 memcpy (&sinp->sin_addr, he->h_addr_list[0], sizeof sinp->sin_addr);
280 tmp->ai_addr = (struct sockaddr *) sinp;
281 tmp->ai_addrlen = sizeof *sinp;
291 if (hints && hints->ai_flags & AI_CANONNAME)
299 tmp->ai_canonname = strdup (cn);
300 if (!tmp->ai_canonname)
307 tmp->ai_protocol = (hints) ? hints->ai_protocol : 0;
308 tmp->ai_socktype = (hints) ? hints->ai_socktype : 0;
309 tmp->ai_addr->sa_family = he->h_addrtype;
310 tmp->ai_family = he->h_addrtype;
312 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
313 switch (he->h_addrtype)
317 tmp->ai_addr->sa_len = sizeof (struct sockaddr_in);
322 tmp->ai_addr->sa_len = sizeof (struct sockaddr_in6);
328 /* FIXME: If more than one address, create linked list of addrinfo's. */
335 /* Free `addrinfo' structure AI including associated storage. */
337 freeaddrinfo (struct addrinfo *ai)
342 freeaddrinfo_ptr (ai);
349 struct addrinfo *cur;
354 free (cur->ai_canonname);
360 getnameinfo (const struct sockaddr *restrict sa, socklen_t salen,
361 char *restrict node, socklen_t nodelen,
362 char *restrict service, socklen_t servicelen,
367 return getnameinfo_ptr (sa, salen, node, nodelen,
368 service, servicelen, flags);
371 /* FIXME: Support other flags. */
372 if ((node && nodelen > 0 && !(flags & NI_NUMERICHOST)) ||
373 (service && servicelen > 0 && !(flags & NI_NUMERICHOST)) ||
374 (flags & ~(NI_NUMERICHOST|NI_NUMERICSERV)))
377 if (sa == NULL || salen < sizeof (sa->sa_family))
380 switch (sa->sa_family)
384 if (salen < sizeof (struct sockaddr_in))
390 if (salen < sizeof (struct sockaddr_in6))
398 if (node && nodelen > 0 && flags & NI_NUMERICHOST)
400 switch (sa->sa_family)
404 if (!inet_ntop (AF_INET,
405 &(((const struct sockaddr_in *) sa)->sin_addr),
413 if (!inet_ntop (AF_INET6,
414 &(((const struct sockaddr_in6 *) sa)->sin6_addr),
425 if (service && servicelen > 0 && flags & NI_NUMERICSERV)
426 switch (sa->sa_family)
435 unsigned short int port
436 = ntohs (((const struct sockaddr_in *) sa)->sin_port);
437 if (servicelen <= snprintf (service, servicelen, "%u", port))