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
43 #if defined _WIN32 || defined __WIN32__
48 typedef int WSAAPI (*getaddrinfo_func) (const char*, const char*,
49 const struct addrinfo*,
51 typedef void WSAAPI (*freeaddrinfo_func) (struct addrinfo*);
52 typedef int WSAAPI (*getnameinfo_func) (const struct sockaddr*,
53 socklen_t, char*, DWORD,
56 static getaddrinfo_func getaddrinfo_ptr = NULL;
57 static freeaddrinfo_func freeaddrinfo_ptr = NULL;
58 static getnameinfo_func getnameinfo_ptr = NULL;
67 return getaddrinfo_ptr ? 1 : 0;
71 h = GetModuleHandle ("ws2_32.dll");
75 getaddrinfo_ptr = GetProcAddress (h, "getaddrinfo");
76 freeaddrinfo_ptr = GetProcAddress (h, "freeaddrinfo");
77 getnameinfo_ptr = GetProcAddress (h, "getnameinfo");
80 /* If either is missing, something is odd. */
81 if (!getaddrinfo_ptr || !freeaddrinfo_ptr || !getnameinfo_ptr)
83 getaddrinfo_ptr = NULL;
84 freeaddrinfo_ptr = NULL;
85 getnameinfo_ptr = NULL;
94 validate_family (int family)
96 /* FIXME: Support more families. */
98 if (family == PF_INET)
102 if (family == PF_INET6)
105 if (family == PF_UNSPEC)
110 /* Translate name of a service location and/or a service name to set of
113 getaddrinfo (const char *restrict nodename,
114 const char *restrict servname,
115 const struct addrinfo *restrict hints,
116 struct addrinfo **restrict res)
118 struct addrinfo *tmp;
125 struct addrinfo addrinfo;
126 struct sockaddr_in6 sockaddr_in6;
131 struct addrinfo addrinfo;
132 struct sockaddr_in sockaddr_in;
138 return getaddrinfo_ptr (nodename, servname, hints, res);
141 if (hints && (hints->ai_flags & ~AI_CANONNAME))
142 /* FIXME: Support more flags. */
145 if (hints && !validate_family (hints->ai_family))
149 hints->ai_socktype != SOCK_STREAM && hints->ai_socktype != SOCK_DGRAM)
150 /* FIXME: Support other socktype. */
151 return EAI_SOCKTYPE; /* FIXME: Better return code? */
154 /* FIXME: Support server bind mode. */
159 struct servent *se = NULL;
161 (hints && hints->ai_socktype == SOCK_DGRAM) ? "udp" : "tcp";
163 if (!(hints->ai_flags & AI_NUMERICSERV))
164 /* FIXME: Use getservbyname_r if available. */
165 se = getservbyname (servname, proto);
170 if (!(*servname >= '0' && *servname <= '9))
172 port = strtoul (servname, &c, 10);
173 if (*c || port > 0xffff)
181 /* FIXME: Use gethostbyname_r if available. */
182 he = gethostbyname (nodename);
183 if (!he || he->h_addr_list[0] == NULL)
186 switch (he->h_addrtype)
190 size = sizeof (struct v6_pair);
196 size = sizeof (struct v4_pair);
204 storage = calloc (1, size);
208 switch (he->h_addrtype)
213 struct v6_pair *p = storage;
214 struct sockaddr_in6 *sinp = &p->sockaddr_in6;
218 sinp->sin6_port = port;
220 if (he->h_length != sizeof (sinp->sin6_addr))
223 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
226 memcpy (&sinp->sin6_addr, he->h_addr_list[0], sizeof sinp->sin6_addr);
228 tmp->ai_addr = (struct sockaddr *) sinp;
229 tmp->ai_addrlen = sizeof *sinp;
237 struct v4_pair *p = storage;
238 struct sockaddr_in *sinp = &p->sockaddr_in;
242 sinp->sin_port = port;
244 if (he->h_length != sizeof (sinp->sin_addr))
247 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
250 memcpy (&sinp->sin_addr, he->h_addr_list[0], sizeof sinp->sin_addr);
252 tmp->ai_addr = (struct sockaddr *) sinp;
253 tmp->ai_addrlen = sizeof *sinp;
263 if (hints && hints->ai_flags & AI_CANONNAME)
271 tmp->ai_canonname = strdup (cn);
272 if (!tmp->ai_canonname)
279 tmp->ai_protocol = (hints) ? hints->ai_protocol : 0;
280 tmp->ai_socktype = (hints) ? hints->ai_socktype : 0;
281 tmp->ai_addr->sa_family = he->h_addrtype;
282 tmp->ai_family = he->h_addrtype;
284 /* FIXME: If more than one address, create linked list of addrinfo's. */
291 /* Free `addrinfo' structure AI including associated storage. */
293 freeaddrinfo (struct addrinfo *ai)
297 return freeaddrinfo_ptr (ai);
302 struct addrinfo *cur;
307 if (cur->ai_canonname) free (cur->ai_canonname);
312 int getnameinfo(const struct sockaddr *restrict sa, socklen_t salen,
313 char *restrict node, socklen_t nodelen,
314 char *restrict service, socklen_t servicelen,
319 return getnameinfo_ptr (sa, salen, node, nodelen,
320 service, servicelen, flags);
323 /* FIXME: Support other flags. */
324 if ((node && nodelen > 0 && !(flags & NI_NUMERICHOST)) ||
325 (service && servicelen > 0 && !(flags & NI_NUMERICHOST)) ||
326 (flags & ~(NI_NUMERICHOST|NI_NUMERICSERV)))
329 if (sa == NULL || salen < sizeof (sa->sa_family))
332 switch (sa->sa_family)
336 if (salen < sizeof (struct sockaddr_in))
342 if (salen < sizeof (struct sockaddr_in6))
350 if (node && nodelen > 0 && flags & NI_NUMERICHOST)
352 switch (sa->sa_family)
356 if (!inet_ntop (AF_INET,
357 &(((const struct sockaddr_in *) sa)->sin_addr),
365 if (!inet_ntop (AF_INET6,
366 &(((const struct sockaddr_in6 *) sa)->sin6_addr),
377 if (service && servicelen > 0 && flags & NI_NUMERICSERV)
378 switch (sa->sa_family)
386 if (snprintf (service, servicelen, "%d",
387 ntohs (((const struct sockaddr_in *) sa)->sin_port))