1 /* Get address information (partial implementation).
2 Copyright (C) 1997, 2001-2002, 2004-2010 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 3, 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__
63 typedef int (WSAAPI *getaddrinfo_func) (const char*, const char*,
64 const struct addrinfo*,
66 typedef void (WSAAPI *freeaddrinfo_func) (struct addrinfo*);
67 typedef int (WSAAPI *getnameinfo_func) (const struct sockaddr*,
68 socklen_t, char*, DWORD,
71 static getaddrinfo_func getaddrinfo_ptr = NULL;
72 static freeaddrinfo_func freeaddrinfo_ptr = NULL;
73 static getnameinfo_func getnameinfo_ptr = NULL;
82 return getaddrinfo_ptr ? 1 : 0;
86 h = GetModuleHandle ("ws2_32.dll");
90 getaddrinfo_ptr = (getaddrinfo_func) GetProcAddress (h, "getaddrinfo");
91 freeaddrinfo_ptr = (freeaddrinfo_func) GetProcAddress (h, "freeaddrinfo");
92 getnameinfo_ptr = (getnameinfo_func) GetProcAddress (h, "getnameinfo");
95 /* If either is missing, something is odd. */
96 if (!getaddrinfo_ptr || !freeaddrinfo_ptr || !getnameinfo_ptr)
98 getaddrinfo_ptr = NULL;
99 freeaddrinfo_ptr = NULL;
100 getnameinfo_ptr = NULL;
109 validate_family (int family)
111 /* FIXME: Support more families. */
113 if (family == PF_INET)
117 if (family == PF_INET6)
120 if (family == PF_UNSPEC)
125 /* Translate name of a service location and/or a service name to set of
128 getaddrinfo (const char *restrict nodename,
129 const char *restrict servname,
130 const struct addrinfo *restrict hints,
131 struct addrinfo **restrict res)
133 struct addrinfo *tmp;
140 struct addrinfo addrinfo;
141 struct sockaddr_in6 sockaddr_in6;
146 struct addrinfo addrinfo;
147 struct sockaddr_in sockaddr_in;
153 return getaddrinfo_ptr (nodename, servname, hints, res);
156 if (hints && (hints->ai_flags & ~(AI_CANONNAME|AI_PASSIVE)))
157 /* FIXME: Support more flags. */
160 if (hints && !validate_family (hints->ai_family))
164 hints->ai_socktype != SOCK_STREAM && hints->ai_socktype != SOCK_DGRAM)
165 /* FIXME: Support other socktype. */
166 return EAI_SOCKTYPE; /* FIXME: Better return code? */
170 if (!(hints->ai_flags & AI_PASSIVE))
174 nodename = (hints->ai_family == AF_INET6) ? "::" : "0.0.0.0";
176 nodename = "0.0.0.0";
182 struct servent *se = NULL;
184 (hints && hints->ai_socktype == SOCK_DGRAM) ? "udp" : "tcp";
186 if (hints == NULL || !(hints->ai_flags & AI_NUMERICSERV))
187 /* FIXME: Use getservbyname_r if available. */
188 se = getservbyname (servname, proto);
193 if (!(*servname >= '0' && *servname <= '9'))
195 port = strtoul (servname, &c, 10);
196 if (*c || port > 0xffff)
204 /* FIXME: Use gethostbyname_r if available. */
205 he = gethostbyname (nodename);
206 if (!he || he->h_addr_list[0] == NULL)
209 switch (he->h_addrtype)
213 size = sizeof (struct v6_pair);
219 size = sizeof (struct v4_pair);
227 storage = calloc (1, size);
231 switch (he->h_addrtype)
236 struct v6_pair *p = storage;
237 struct sockaddr_in6 *sinp = &p->sockaddr_in6;
241 sinp->sin6_port = port;
243 if (he->h_length != sizeof (sinp->sin6_addr))
246 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
249 memcpy (&sinp->sin6_addr, he->h_addr_list[0], sizeof sinp->sin6_addr);
251 tmp->ai_addr = (struct sockaddr *) sinp;
252 tmp->ai_addrlen = sizeof *sinp;
260 struct v4_pair *p = storage;
261 struct sockaddr_in *sinp = &p->sockaddr_in;
265 sinp->sin_port = port;
267 if (he->h_length != sizeof (sinp->sin_addr))
270 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
273 memcpy (&sinp->sin_addr, he->h_addr_list[0], sizeof sinp->sin_addr);
275 tmp->ai_addr = (struct sockaddr *) sinp;
276 tmp->ai_addrlen = sizeof *sinp;
286 if (hints && hints->ai_flags & AI_CANONNAME)
294 tmp->ai_canonname = strdup (cn);
295 if (!tmp->ai_canonname)
302 tmp->ai_protocol = (hints) ? hints->ai_protocol : 0;
303 tmp->ai_socktype = (hints) ? hints->ai_socktype : 0;
304 tmp->ai_addr->sa_family = he->h_addrtype;
305 tmp->ai_family = he->h_addrtype;
307 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
308 switch (he->h_addrtype)
312 tmp->ai_addr->sa_len = sizeof (struct sockaddr_in);
317 tmp->ai_addr->sa_len = sizeof (struct sockaddr_in6);
323 /* FIXME: If more than one address, create linked list of addrinfo's. */
330 /* Free `addrinfo' structure AI including associated storage. */
332 freeaddrinfo (struct addrinfo *ai)
337 freeaddrinfo_ptr (ai);
344 struct addrinfo *cur;
349 free (cur->ai_canonname);
355 getnameinfo (const struct sockaddr *restrict sa, socklen_t salen,
356 char *restrict node, socklen_t nodelen,
357 char *restrict service, socklen_t servicelen,
362 return getnameinfo_ptr (sa, salen, node, nodelen,
363 service, servicelen, flags);
366 /* FIXME: Support other flags. */
367 if ((node && nodelen > 0 && !(flags & NI_NUMERICHOST)) ||
368 (service && servicelen > 0 && !(flags & NI_NUMERICHOST)) ||
369 (flags & ~(NI_NUMERICHOST|NI_NUMERICSERV)))
372 if (sa == NULL || salen < sizeof (sa->sa_family))
375 switch (sa->sa_family)
379 if (salen < sizeof (struct sockaddr_in))
385 if (salen < sizeof (struct sockaddr_in6))
393 if (node && nodelen > 0 && flags & NI_NUMERICHOST)
395 switch (sa->sa_family)
399 if (!inet_ntop (AF_INET,
400 &(((const struct sockaddr_in *) sa)->sin_addr),
408 if (!inet_ntop (AF_INET6,
409 &(((const struct sockaddr_in6 *) sa)->sin6_addr),
420 if (service && servicelen > 0 && flags & NI_NUMERICSERV)
421 switch (sa->sa_family)
430 unsigned short int port
431 = ntohs (((const struct sockaddr_in *) sa)->sin_port);
432 if (servicelen <= snprintf (service, servicelen, "%u", port))