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. */
37 #define _(String) gettext (String)
38 #define N_(String) String
40 #include "inet_ntop.h"
43 /* BeOS has AF_INET, but not PF_INET. */
45 # define PF_INET AF_INET
47 /* BeOS also lacks PF_UNSPEC. */
52 #if defined _WIN32 || defined __WIN32__
57 typedef int (WSAAPI *getaddrinfo_func) (const char*, const char*,
58 const struct addrinfo*,
60 typedef void (WSAAPI *freeaddrinfo_func) (struct addrinfo*);
61 typedef int (WSAAPI *getnameinfo_func) (const struct sockaddr*,
62 socklen_t, char*, DWORD,
65 static getaddrinfo_func getaddrinfo_ptr = NULL;
66 static freeaddrinfo_func freeaddrinfo_ptr = NULL;
67 static getnameinfo_func getnameinfo_ptr = NULL;
76 return getaddrinfo_ptr ? 1 : 0;
80 h = GetModuleHandle ("ws2_32.dll");
84 getaddrinfo_ptr = (getaddrinfo_func) GetProcAddress (h, "getaddrinfo");
85 freeaddrinfo_ptr = (freeaddrinfo_func) GetProcAddress (h, "freeaddrinfo");
86 getnameinfo_ptr = (getnameinfo_func) GetProcAddress (h, "getnameinfo");
89 /* If either is missing, something is odd. */
90 if (!getaddrinfo_ptr || !freeaddrinfo_ptr || !getnameinfo_ptr)
92 getaddrinfo_ptr = NULL;
93 freeaddrinfo_ptr = NULL;
94 getnameinfo_ptr = NULL;
103 validate_family (int family)
105 /* FIXME: Support more families. */
107 if (family == PF_INET)
111 if (family == PF_INET6)
114 if (family == PF_UNSPEC)
119 /* Translate name of a service location and/or a service name to set of
122 getaddrinfo (const char *restrict nodename,
123 const char *restrict servname,
124 const struct addrinfo *restrict hints,
125 struct addrinfo **restrict res)
127 struct addrinfo *tmp;
134 struct addrinfo addrinfo;
135 struct sockaddr_in6 sockaddr_in6;
140 struct addrinfo addrinfo;
141 struct sockaddr_in sockaddr_in;
147 return getaddrinfo_ptr (nodename, servname, hints, res);
150 if (hints && (hints->ai_flags & ~(AI_CANONNAME|AI_PASSIVE)))
151 /* FIXME: Support more flags. */
154 if (hints && !validate_family (hints->ai_family))
158 hints->ai_socktype != SOCK_STREAM && hints->ai_socktype != SOCK_DGRAM)
159 /* FIXME: Support other socktype. */
160 return EAI_SOCKTYPE; /* FIXME: Better return code? */
164 if (!(hints->ai_flags & AI_PASSIVE))
168 nodename = (hints->ai_family == AF_INET6) ? "::" : "0.0.0.0";
170 nodename = "0.0.0.0";
176 struct servent *se = NULL;
178 (hints && hints->ai_socktype == SOCK_DGRAM) ? "udp" : "tcp";
180 if (!(hints->ai_flags & AI_NUMERICSERV))
181 /* FIXME: Use getservbyname_r if available. */
182 se = getservbyname (servname, proto);
187 if (!(*servname >= '0' && *servname <= '9'))
189 port = strtoul (servname, &c, 10);
190 if (*c || port > 0xffff)
198 /* FIXME: Use gethostbyname_r if available. */
199 he = gethostbyname (nodename);
200 if (!he || he->h_addr_list[0] == NULL)
203 switch (he->h_addrtype)
207 size = sizeof (struct v6_pair);
213 size = sizeof (struct v4_pair);
221 storage = calloc (1, size);
225 switch (he->h_addrtype)
230 struct v6_pair *p = storage;
231 struct sockaddr_in6 *sinp = &p->sockaddr_in6;
235 sinp->sin6_port = port;
237 if (he->h_length != sizeof (sinp->sin6_addr))
240 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
243 memcpy (&sinp->sin6_addr, he->h_addr_list[0], sizeof sinp->sin6_addr);
245 tmp->ai_addr = (struct sockaddr *) sinp;
246 tmp->ai_addrlen = sizeof *sinp;
254 struct v4_pair *p = storage;
255 struct sockaddr_in *sinp = &p->sockaddr_in;
259 sinp->sin_port = port;
261 if (he->h_length != sizeof (sinp->sin_addr))
264 return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
267 memcpy (&sinp->sin_addr, he->h_addr_list[0], sizeof sinp->sin_addr);
269 tmp->ai_addr = (struct sockaddr *) sinp;
270 tmp->ai_addrlen = sizeof *sinp;
280 if (hints && hints->ai_flags & AI_CANONNAME)
288 tmp->ai_canonname = strdup (cn);
289 if (!tmp->ai_canonname)
296 tmp->ai_protocol = (hints) ? hints->ai_protocol : 0;
297 tmp->ai_socktype = (hints) ? hints->ai_socktype : 0;
298 tmp->ai_addr->sa_family = he->h_addrtype;
299 tmp->ai_family = he->h_addrtype;
301 /* FIXME: If more than one address, create linked list of addrinfo's. */
308 /* Free `addrinfo' structure AI including associated storage. */
310 freeaddrinfo (struct addrinfo *ai)
315 freeaddrinfo_ptr (ai);
322 struct addrinfo *cur;
327 if (cur->ai_canonname) free (cur->ai_canonname);
332 int getnameinfo(const struct sockaddr *restrict sa, socklen_t salen,
333 char *restrict node, socklen_t nodelen,
334 char *restrict service, socklen_t servicelen,
339 return getnameinfo_ptr (sa, salen, node, nodelen,
340 service, servicelen, flags);
343 /* FIXME: Support other flags. */
344 if ((node && nodelen > 0 && !(flags & NI_NUMERICHOST)) ||
345 (service && servicelen > 0 && !(flags & NI_NUMERICHOST)) ||
346 (flags & ~(NI_NUMERICHOST|NI_NUMERICSERV)))
349 if (sa == NULL || salen < sizeof (sa->sa_family))
352 switch (sa->sa_family)
356 if (salen < sizeof (struct sockaddr_in))
362 if (salen < sizeof (struct sockaddr_in6))
370 if (node && nodelen > 0 && flags & NI_NUMERICHOST)
372 switch (sa->sa_family)
376 if (!inet_ntop (AF_INET,
377 &(((const struct sockaddr_in *) sa)->sin_addr),
385 if (!inet_ntop (AF_INET6,
386 &(((const struct sockaddr_in6 *) sa)->sin6_addr),
397 if (service && servicelen > 0 && flags & NI_NUMERICSERV)
398 switch (sa->sa_family)
407 unsigned short int port
408 = ntohs (((const struct sockaddr_in *) sa)->sin_port);
409 if (servicelen <= snprintf (service, servicelen, "%u", port))