1 /* Get address information (partial implementation).
2 Copyright (C) 1997, 2001, 2002, 2004, 2005, 2006, 2007 Free Software
4 Contributed by Simon Josefsson <simon@josefsson.org>.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software Foundation,
18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
22 #include "getaddrinfo.h"
25 # include <netinet/in.h>
31 /* Get memcpy, strdup. */
40 #define _(String) gettext (String)
41 #define N_(String) String
43 #include "inet_ntop.h"
45 /* BeOS has AF_INET, but not PF_INET. */
47 # define PF_INET AF_INET
49 /* BeOS also lacks PF_UNSPEC. */
54 #if defined _WIN32 || defined __WIN32__
59 typedef int (WSAAPI *getaddrinfo_func) (const char*, const char*,
60 const struct addrinfo*,
62 typedef void (WSAAPI *freeaddrinfo_func) (struct addrinfo*);
63 typedef int (WSAAPI *getnameinfo_func) (const struct sockaddr*,
64 socklen_t, char*, DWORD,
67 static getaddrinfo_func getaddrinfo_ptr = NULL;
68 static freeaddrinfo_func freeaddrinfo_ptr = NULL;
69 static getnameinfo_func getnameinfo_ptr = NULL;
78 return getaddrinfo_ptr ? 1 : 0;
82 h = GetModuleHandle ("ws2_32.dll");
86 getaddrinfo_ptr = (getaddrinfo_func) GetProcAddress (h, "getaddrinfo");
87 freeaddrinfo_ptr = (freeaddrinfo_func) GetProcAddress (h, "freeaddrinfo");
88 getnameinfo_ptr = (getnameinfo_func) GetProcAddress (h, "getnameinfo");
91 /* If either is missing, something is odd. */
92 if (!getaddrinfo_ptr || !freeaddrinfo_ptr || !getnameinfo_ptr)
94 getaddrinfo_ptr = NULL;
95 freeaddrinfo_ptr = NULL;
96 getnameinfo_ptr = NULL;
105 validate_family (int family)
107 /* FIXME: Support more families. */
109 if (family == PF_INET)
113 if (family == PF_INET6)
116 if (family == PF_UNSPEC)
121 /* Translate name of a service location and/or a service name to set of
124 getaddrinfo (const char *restrict nodename,
125 const char *restrict servname,
126 const struct addrinfo *restrict hints,
127 struct addrinfo **restrict res)
129 struct addrinfo *tmp;
136 struct addrinfo addrinfo;
137 struct sockaddr_in6 sockaddr_in6;
142 struct addrinfo addrinfo;
143 struct sockaddr_in sockaddr_in;
149 return getaddrinfo_ptr (nodename, servname, hints, res);
152 if (hints && (hints->ai_flags & ~(AI_CANONNAME|AI_PASSIVE)))
153 /* FIXME: Support more flags. */
156 if (hints && !validate_family (hints->ai_family))
160 hints->ai_socktype != SOCK_STREAM && hints->ai_socktype != SOCK_DGRAM)
161 /* FIXME: Support other socktype. */
162 return EAI_SOCKTYPE; /* FIXME: Better return code? */
166 if (!(hints->ai_flags & AI_PASSIVE))
170 nodename = (hints->ai_family == AF_INET6) ? "::" : "0.0.0.0";
172 nodename = "0.0.0.0";
178 struct servent *se = NULL;
180 (hints && hints->ai_socktype == SOCK_DGRAM) ? "udp" : "tcp";
182 if (!(hints->ai_flags & AI_NUMERICSERV))
183 /* FIXME: Use getservbyname_r if available. */
184 se = getservbyname (servname, proto);
189 if (!(*servname >= '0' && *servname <= '9'))
191 port = strtoul (servname, &c, 10);
192 if (*c || port > 0xffff)
200 /* FIXME: Use gethostbyname_r if available. */
201 he = gethostbyname (nodename);
202 if (!he || he->h_addr_list[0] == NULL)
205 switch (he->h_addrtype)
209 size = sizeof (struct v6_pair);
215 size = sizeof (struct v4_pair);
223 storage = calloc (1, size);
227 switch (he->h_addrtype)
232 struct v6_pair *p = storage;
233 struct sockaddr_in6 *sinp = &p->sockaddr_in6;
237 sinp->sin6_port = port;
239 if (he->h_length != sizeof (sinp->sin6_addr))
242 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
245 memcpy (&sinp->sin6_addr, he->h_addr_list[0], sizeof sinp->sin6_addr);
247 tmp->ai_addr = (struct sockaddr *) sinp;
248 tmp->ai_addrlen = sizeof *sinp;
256 struct v4_pair *p = storage;
257 struct sockaddr_in *sinp = &p->sockaddr_in;
261 sinp->sin_port = port;
263 if (he->h_length != sizeof (sinp->sin_addr))
266 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
269 memcpy (&sinp->sin_addr, he->h_addr_list[0], sizeof sinp->sin_addr);
271 tmp->ai_addr = (struct sockaddr *) sinp;
272 tmp->ai_addrlen = sizeof *sinp;
282 if (hints && hints->ai_flags & AI_CANONNAME)
290 tmp->ai_canonname = strdup (cn);
291 if (!tmp->ai_canonname)
298 tmp->ai_protocol = (hints) ? hints->ai_protocol : 0;
299 tmp->ai_socktype = (hints) ? hints->ai_socktype : 0;
300 tmp->ai_addr->sa_family = he->h_addrtype;
301 tmp->ai_family = he->h_addrtype;
303 /* FIXME: If more than one address, create linked list of addrinfo's. */
310 /* Free `addrinfo' structure AI including associated storage. */
312 freeaddrinfo (struct addrinfo *ai)
317 freeaddrinfo_ptr (ai);
324 struct addrinfo *cur;
329 if (cur->ai_canonname) free (cur->ai_canonname);
334 int getnameinfo(const struct sockaddr *restrict sa, socklen_t salen,
335 char *restrict node, socklen_t nodelen,
336 char *restrict service, socklen_t servicelen,
341 return getnameinfo_ptr (sa, salen, node, nodelen,
342 service, servicelen, flags);
345 /* FIXME: Support other flags. */
346 if ((node && nodelen > 0 && !(flags & NI_NUMERICHOST)) ||
347 (service && servicelen > 0 && !(flags & NI_NUMERICHOST)) ||
348 (flags & ~(NI_NUMERICHOST|NI_NUMERICSERV)))
351 if (sa == NULL || salen < sizeof (sa->sa_family))
354 switch (sa->sa_family)
358 if (salen < sizeof (struct sockaddr_in))
364 if (salen < sizeof (struct sockaddr_in6))
372 if (node && nodelen > 0 && flags & NI_NUMERICHOST)
374 switch (sa->sa_family)
378 if (!inet_ntop (AF_INET,
379 &(((const struct sockaddr_in *) sa)->sin_addr),
387 if (!inet_ntop (AF_INET6,
388 &(((const struct sockaddr_in6 *) sa)->sin6_addr),
399 if (service && servicelen > 0 && flags & NI_NUMERICSERV)
400 switch (sa->sa_family)
409 unsigned short int port
410 = ntohs (((const struct sockaddr_in *) sa)->sin_port);
411 if (servicelen <= snprintf (service, servicelen, "%u", port))