1 /* Get address information (partial implementation).
2 Copyright (C) 1997, 2001-2002, 2004-2012 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, see <http://www.gnu.org/licenses/>. */
20 /* Don't use __attribute__ __nonnull__ in this compilation unit. Otherwise gcc
21 optimizes away the sa == NULL test below. */
22 #define _GL_ARG_NONNULL(params)
27 # include <netinet/in.h>
31 #include <arpa/inet.h>
36 /* Get memcpy, strdup. */
45 #define _(String) gettext (String)
46 #define N_(String) String
48 /* BeOS has AF_INET, but not PF_INET. */
50 # define PF_INET AF_INET
52 /* BeOS also lacks PF_UNSPEC. */
57 #if defined _WIN32 || defined __WIN32__
58 # define WINDOWS_NATIVE
61 /* gl_sockets_startup */
65 typedef int (WSAAPI *getaddrinfo_func) (const char*, const char*,
66 const struct addrinfo*,
68 typedef void (WSAAPI *freeaddrinfo_func) (struct addrinfo*);
69 typedef int (WSAAPI *getnameinfo_func) (const struct sockaddr*,
70 socklen_t, char*, DWORD,
73 static getaddrinfo_func getaddrinfo_ptr = NULL;
74 static freeaddrinfo_func freeaddrinfo_ptr = NULL;
75 static getnameinfo_func getnameinfo_ptr = NULL;
84 return getaddrinfo_ptr ? 1 : 0;
88 h = GetModuleHandle ("ws2_32.dll");
92 getaddrinfo_ptr = (getaddrinfo_func) GetProcAddress (h, "getaddrinfo");
93 freeaddrinfo_ptr = (freeaddrinfo_func) GetProcAddress (h, "freeaddrinfo");
94 getnameinfo_ptr = (getnameinfo_func) GetProcAddress (h, "getnameinfo");
97 /* If either is missing, something is odd. */
98 if (!getaddrinfo_ptr || !freeaddrinfo_ptr || !getnameinfo_ptr)
100 getaddrinfo_ptr = NULL;
101 freeaddrinfo_ptr = NULL;
102 getnameinfo_ptr = NULL;
106 gl_sockets_startup (SOCKETS_1_1);
113 validate_family (int family)
115 /* FIXME: Support more families. */
117 if (family == PF_INET)
121 if (family == PF_INET6)
124 if (family == PF_UNSPEC)
129 /* Translate name of a service location and/or a service name to set of
132 getaddrinfo (const char *restrict nodename,
133 const char *restrict servname,
134 const struct addrinfo *restrict hints,
135 struct addrinfo **restrict res)
137 struct addrinfo *tmp;
144 struct addrinfo addrinfo;
145 struct sockaddr_in6 sockaddr_in6;
150 struct addrinfo addrinfo;
151 struct sockaddr_in sockaddr_in;
155 #ifdef WINDOWS_NATIVE
157 return getaddrinfo_ptr (nodename, servname, hints, res);
160 if (hints && (hints->ai_flags & ~(AI_CANONNAME|AI_PASSIVE)))
161 /* FIXME: Support more flags. */
164 if (hints && !validate_family (hints->ai_family))
168 hints->ai_socktype != SOCK_STREAM && hints->ai_socktype != SOCK_DGRAM)
169 /* FIXME: Support other socktype. */
170 return EAI_SOCKTYPE; /* FIXME: Better return code? */
174 if (!(hints->ai_flags & AI_PASSIVE))
178 nodename = (hints->ai_family == AF_INET6) ? "::" : "0.0.0.0";
180 nodename = "0.0.0.0";
186 struct servent *se = NULL;
188 (hints && hints->ai_socktype == SOCK_DGRAM) ? "udp" : "tcp";
190 if (hints == NULL || !(hints->ai_flags & AI_NUMERICSERV))
191 /* FIXME: Use getservbyname_r if available. */
192 se = getservbyname (servname, proto);
197 if (!(*servname >= '0' && *servname <= '9'))
199 port = strtoul (servname, &c, 10);
200 if (*c || port > 0xffff)
208 /* FIXME: Use gethostbyname_r if available. */
209 he = gethostbyname (nodename);
210 if (!he || he->h_addr_list[0] == NULL)
213 switch (he->h_addrtype)
217 size = sizeof (struct v6_pair);
223 size = sizeof (struct v4_pair);
231 storage = calloc (1, size);
235 switch (he->h_addrtype)
240 struct v6_pair *p = storage;
241 struct sockaddr_in6 *sinp = &p->sockaddr_in6;
245 sinp->sin6_port = port;
247 if (he->h_length != sizeof (sinp->sin6_addr))
250 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
253 memcpy (&sinp->sin6_addr, he->h_addr_list[0], sizeof sinp->sin6_addr);
255 tmp->ai_addr = (struct sockaddr *) sinp;
256 tmp->ai_addrlen = sizeof *sinp;
264 struct v4_pair *p = storage;
265 struct sockaddr_in *sinp = &p->sockaddr_in;
269 sinp->sin_port = port;
271 if (he->h_length != sizeof (sinp->sin_addr))
274 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
277 memcpy (&sinp->sin_addr, he->h_addr_list[0], sizeof sinp->sin_addr);
279 tmp->ai_addr = (struct sockaddr *) sinp;
280 tmp->ai_addrlen = sizeof *sinp;
290 if (hints && hints->ai_flags & AI_CANONNAME)
298 tmp->ai_canonname = strdup (cn);
299 if (!tmp->ai_canonname)
306 tmp->ai_protocol = (hints) ? hints->ai_protocol : 0;
307 tmp->ai_socktype = (hints) ? hints->ai_socktype : 0;
308 tmp->ai_addr->sa_family = he->h_addrtype;
309 tmp->ai_family = he->h_addrtype;
311 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
312 switch (he->h_addrtype)
316 tmp->ai_addr->sa_len = sizeof (struct sockaddr_in);
321 tmp->ai_addr->sa_len = sizeof (struct sockaddr_in6);
327 /* FIXME: If more than one address, create linked list of addrinfo's. */
334 /* Free 'addrinfo' structure AI including associated storage. */
336 freeaddrinfo (struct addrinfo *ai)
338 #ifdef WINDOWS_NATIVE
341 freeaddrinfo_ptr (ai);
348 struct addrinfo *cur;
353 free (cur->ai_canonname);
359 getnameinfo (const struct sockaddr *restrict sa, socklen_t salen,
360 char *restrict node, socklen_t nodelen,
361 char *restrict service, socklen_t servicelen,
364 #ifdef WINDOWS_NATIVE
366 return getnameinfo_ptr (sa, salen, node, nodelen,
367 service, servicelen, flags);
370 /* FIXME: Support other flags. */
371 if ((node && nodelen > 0 && !(flags & NI_NUMERICHOST)) ||
372 (service && servicelen > 0 && !(flags & NI_NUMERICHOST)) ||
373 (flags & ~(NI_NUMERICHOST|NI_NUMERICSERV)))
376 if (sa == NULL || salen < sizeof (sa->sa_family))
379 switch (sa->sa_family)
383 if (salen < sizeof (struct sockaddr_in))
389 if (salen < sizeof (struct sockaddr_in6))
397 if (node && nodelen > 0 && flags & NI_NUMERICHOST)
399 switch (sa->sa_family)
403 if (!inet_ntop (AF_INET,
404 &(((const struct sockaddr_in *) sa)->sin_addr),
412 if (!inet_ntop (AF_INET6,
413 &(((const struct sockaddr_in6 *) sa)->sin6_addr),
424 if (service && servicelen > 0 && flags & NI_NUMERICSERV)
425 switch (sa->sa_family)
434 unsigned short int port
435 = ntohs (((const struct sockaddr_in *) sa)->sin_port);
436 if (servicelen <= snprintf (service, servicelen, "%u", port))