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"
46 /* BeOS has AF_INET, but not PF_INET. */
48 # define PF_INET AF_INET
50 /* BeOS also lacks PF_UNSPEC. */
55 #if defined _WIN32 || defined __WIN32__
60 typedef int (WSAAPI *getaddrinfo_func) (const char*, const char*,
61 const struct addrinfo*,
63 typedef void (WSAAPI *freeaddrinfo_func) (struct addrinfo*);
64 typedef int (WSAAPI *getnameinfo_func) (const struct sockaddr*,
65 socklen_t, char*, DWORD,
68 static getaddrinfo_func getaddrinfo_ptr = NULL;
69 static freeaddrinfo_func freeaddrinfo_ptr = NULL;
70 static getnameinfo_func getnameinfo_ptr = NULL;
79 return getaddrinfo_ptr ? 1 : 0;
83 h = GetModuleHandle ("ws2_32.dll");
87 getaddrinfo_ptr = (getaddrinfo_func) GetProcAddress (h, "getaddrinfo");
88 freeaddrinfo_ptr = (freeaddrinfo_func) GetProcAddress (h, "freeaddrinfo");
89 getnameinfo_ptr = (getnameinfo_func) GetProcAddress (h, "getnameinfo");
92 /* If either is missing, something is odd. */
93 if (!getaddrinfo_ptr || !freeaddrinfo_ptr || !getnameinfo_ptr)
95 getaddrinfo_ptr = NULL;
96 freeaddrinfo_ptr = NULL;
97 getnameinfo_ptr = NULL;
106 validate_family (int family)
108 /* FIXME: Support more families. */
110 if (family == PF_INET)
114 if (family == PF_INET6)
117 if (family == PF_UNSPEC)
122 /* Translate name of a service location and/or a service name to set of
125 getaddrinfo (const char *restrict nodename,
126 const char *restrict servname,
127 const struct addrinfo *restrict hints,
128 struct addrinfo **restrict res)
130 struct addrinfo *tmp;
137 struct addrinfo addrinfo;
138 struct sockaddr_in6 sockaddr_in6;
143 struct addrinfo addrinfo;
144 struct sockaddr_in sockaddr_in;
150 return getaddrinfo_ptr (nodename, servname, hints, res);
153 if (hints && (hints->ai_flags & ~(AI_CANONNAME|AI_PASSIVE)))
154 /* FIXME: Support more flags. */
157 if (hints && !validate_family (hints->ai_family))
161 hints->ai_socktype != SOCK_STREAM && hints->ai_socktype != SOCK_DGRAM)
162 /* FIXME: Support other socktype. */
163 return EAI_SOCKTYPE; /* FIXME: Better return code? */
167 if (!(hints->ai_flags & AI_PASSIVE))
171 nodename = (hints->ai_family == AF_INET6) ? "::" : "0.0.0.0";
173 nodename = "0.0.0.0";
179 struct servent *se = NULL;
181 (hints && hints->ai_socktype == SOCK_DGRAM) ? "udp" : "tcp";
183 if (!(hints->ai_flags & AI_NUMERICSERV))
184 /* FIXME: Use getservbyname_r if available. */
185 se = getservbyname (servname, proto);
190 if (!(*servname >= '0' && *servname <= '9'))
192 port = strtoul (servname, &c, 10);
193 if (*c || port > 0xffff)
201 /* FIXME: Use gethostbyname_r if available. */
202 he = gethostbyname (nodename);
203 if (!he || he->h_addr_list[0] == NULL)
206 switch (he->h_addrtype)
210 size = sizeof (struct v6_pair);
216 size = sizeof (struct v4_pair);
224 storage = calloc (1, size);
228 switch (he->h_addrtype)
233 struct v6_pair *p = storage;
234 struct sockaddr_in6 *sinp = &p->sockaddr_in6;
238 sinp->sin6_port = port;
240 if (he->h_length != sizeof (sinp->sin6_addr))
243 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
246 memcpy (&sinp->sin6_addr, he->h_addr_list[0], sizeof sinp->sin6_addr);
248 tmp->ai_addr = (struct sockaddr *) sinp;
249 tmp->ai_addrlen = sizeof *sinp;
257 struct v4_pair *p = storage;
258 struct sockaddr_in *sinp = &p->sockaddr_in;
262 sinp->sin_port = port;
264 if (he->h_length != sizeof (sinp->sin_addr))
267 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
270 memcpy (&sinp->sin_addr, he->h_addr_list[0], sizeof sinp->sin_addr);
272 tmp->ai_addr = (struct sockaddr *) sinp;
273 tmp->ai_addrlen = sizeof *sinp;
283 if (hints && hints->ai_flags & AI_CANONNAME)
291 tmp->ai_canonname = strdup (cn);
292 if (!tmp->ai_canonname)
299 tmp->ai_protocol = (hints) ? hints->ai_protocol : 0;
300 tmp->ai_socktype = (hints) ? hints->ai_socktype : 0;
301 tmp->ai_addr->sa_family = he->h_addrtype;
302 tmp->ai_family = he->h_addrtype;
304 /* FIXME: If more than one address, create linked list of addrinfo's. */
311 /* Free `addrinfo' structure AI including associated storage. */
313 freeaddrinfo (struct addrinfo *ai)
318 freeaddrinfo_ptr (ai);
325 struct addrinfo *cur;
330 if (cur->ai_canonname) free (cur->ai_canonname);
335 int getnameinfo(const struct sockaddr *restrict sa, socklen_t salen,
336 char *restrict node, socklen_t nodelen,
337 char *restrict service, socklen_t servicelen,
342 return getnameinfo_ptr (sa, salen, node, nodelen,
343 service, servicelen, flags);
346 /* FIXME: Support other flags. */
347 if ((node && nodelen > 0 && !(flags & NI_NUMERICHOST)) ||
348 (service && servicelen > 0 && !(flags & NI_NUMERICHOST)) ||
349 (flags & ~(NI_NUMERICHOST|NI_NUMERICSERV)))
352 if (sa == NULL || salen < sizeof (sa->sa_family))
355 switch (sa->sa_family)
359 if (salen < sizeof (struct sockaddr_in))
365 if (salen < sizeof (struct sockaddr_in6))
373 if (node && nodelen > 0 && flags & NI_NUMERICHOST)
375 switch (sa->sa_family)
379 if (!inet_ntop (AF_INET,
380 &(((const struct sockaddr_in *) sa)->sin_addr),
388 if (!inet_ntop (AF_INET6,
389 &(((const struct sockaddr_in6 *) sa)->sin6_addr),
400 if (service && servicelen > 0 && flags & NI_NUMERICSERV)
401 switch (sa->sa_family)
410 unsigned short int port
411 = ntohs (((const struct sockaddr_in *) sa)->sin_port);
412 char buf[INT_BUFSIZE_BOUND (port)];
413 char const *s = uinttostr (port, buf);
414 if (strlen (s) + 1 > servicelen)
416 memcpy (service, s, strlen (s) + 1);