1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2007, Daniel Stenberg, <daniel@haxx.se>, et al.
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at http://curl.haxx.se/docs/copyright.html.
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
22 ***************************************************************************/
31 #ifdef HAVE_SYS_SOCKET_H
32 #include <sys/socket.h>
34 #ifdef HAVE_NETINET_IN_H
35 #include <netinet/in.h>
40 #ifdef HAVE_ARPA_INET_H
41 #include <arpa/inet.h>
44 #include <stdlib.h> /* required for free() prototypes */
47 #include <unistd.h> /* for the close() proto */
70 #include "inet_pton.h"
73 #define _MPRINTF_REPLACE /* use our functions only */
74 #include <curl/mprintf.h>
77 /* The last #include file should be: */
80 /***********************************************************************
81 * Only for ipv6-enabled builds
82 **********************************************************************/
86 * This is a wrapper function for freeing name information in a protocol
87 * independent way. This takes care of using the appropriate underlaying
90 void Curl_freeaddrinfo(Curl_addrinfo *p)
97 * Curl_addrinfo_copy() is used by the asynch callback to copy a given
98 * address. But this is an ipv6 build and then we don't copy the address, we
99 * just return the same pointer!
101 Curl_addrinfo *Curl_addrinfo_copy(const void *orig, int port)
104 return (Curl_addrinfo*)orig;
106 #endif /* CURLRES_ASYNCH */
107 #endif /* CURLRES_ARES */
110 /* These are strictly for memory tracing and are using the same style as the
111 * family otherwise present in memdebug.c. I put these ones here since they
112 * require a bunch of structs I didn't wanna include in memdebug.c
114 int curl_dogetaddrinfo(const char *hostname, const char *service,
115 struct addrinfo *hints,
116 struct addrinfo **result,
117 int line, const char *source)
119 int res=(getaddrinfo)(hostname, service, hints, result);
123 fprintf(logfile, "ADDR %s:%d getaddrinfo() = %p\n",
124 source, line, (void *)*result);
128 fprintf(logfile, "ADDR %s:%d getaddrinfo() failed\n",
135 * For CURLRES_ARS, this should be written using ares_gethostbyaddr()
136 * (ignoring the fact c-ares doesn't return 'serv').
138 #ifdef HAVE_GETNAMEINFO
139 int curl_dogetnameinfo(GETNAMEINFO_QUAL_ARG1 GETNAMEINFO_TYPE_ARG1 sa,
140 GETNAMEINFO_TYPE_ARG2 salen,
141 char *host, GETNAMEINFO_TYPE_ARG46 hostlen,
142 char *serv, GETNAMEINFO_TYPE_ARG46 servlen,
143 GETNAMEINFO_TYPE_ARG7 flags,
144 int line, const char *source)
146 int res = (getnameinfo)(sa, salen,
153 fprintf(logfile, "GETNAME %s:%d getnameinfo()\n",
158 fprintf(logfile, "GETNAME %s:%d getnameinfo() failed = %d\n",
165 void curl_dofreeaddrinfo(struct addrinfo *freethis,
166 int line, const char *source)
168 (freeaddrinfo)(freethis);
170 fprintf(logfile, "ADDR %s:%d freeaddrinfo(%p)\n",
171 source, line, (void *)freethis);
173 #endif /* CURLDEBUG */
176 * Curl_ipvalid() checks what CURL_IPRESOLVE_* requirements that might've
177 * been set and returns TRUE if they are OK.
179 bool Curl_ipvalid(struct SessionHandle *data)
181 if(data->set.ip_version == CURL_IPRESOLVE_V6) {
182 /* see if we have an IPv6 stack */
183 curl_socket_t s = socket(PF_INET6, SOCK_DGRAM, 0);
184 if(s == CURL_SOCKET_BAD)
185 /* an ipv6 address was requested and we can't get/use one */
192 #if !defined(USE_THREADING_GETADDRINFO) && !defined(CURLRES_ARES)
194 #ifdef DEBUG_ADDRINFO
195 static void dump_addrinfo(struct connectdata *conn, const struct addrinfo *ai)
197 printf("dump_addrinfo:\n");
198 for ( ; ai; ai = ai->ai_next) {
199 char buf[INET6_ADDRSTRLEN];
201 printf(" fam %2d, CNAME %s, ",
202 ai->ai_family, ai->ai_canonname ? ai->ai_canonname : "<none>");
203 if(Curl_printable_address(ai, buf, sizeof(buf)))
206 printf("failed; %s\n", Curl_strerror(conn, SOCKERRNO));
210 #define dump_addrinfo(x,y)
214 * Curl_getaddrinfo() when built ipv6-enabled (non-threading and
217 * Returns name information about the given hostname and port number. If
218 * successful, the 'addrinfo' is returned and the forth argument will point to
219 * memory we need to free after use. That memory *MUST* be freed with
220 * Curl_freeaddrinfo(), nothing else.
222 Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
223 const char *hostname,
227 struct addrinfo hints, *res;
229 char sbuf[NI_MAXSERV];
230 char *sbufptr = NULL;
233 struct SessionHandle *data = conn->data;
235 *waitp=0; /* don't wait, we have the response now */
238 * Check if a limited name resolve has been requested.
240 switch(data->set.ip_version) {
241 case CURL_IPRESOLVE_V4:
244 case CURL_IPRESOLVE_V6:
253 /* see if we have an IPv6 stack */
254 curl_socket_t s = socket(PF_INET6, SOCK_DGRAM, 0);
255 if(s == CURL_SOCKET_BAD) {
256 /* Some non-IPv6 stacks have been found to make very slow name resolves
257 * when PF_UNSPEC is used, so thus we switch to a mere PF_INET lookup if
258 * the stack seems to be a non-ipv6 one. */
263 /* This seems to be an IPv6-capable stack, use PF_UNSPEC for the widest
264 * possible checks. And close the socket again.
270 memset(&hints, 0, sizeof(hints));
271 hints.ai_family = pf;
272 hints.ai_socktype = conn->socktype;
274 if((1 == Curl_inet_pton(AF_INET, hostname, addrbuf)) ||
275 (1 == Curl_inet_pton(AF_INET6, hostname, addrbuf))) {
276 /* the given address is numerical only, prevent a reverse lookup */
277 hints.ai_flags = AI_NUMERICHOST;
280 if(conn->data->set.krb)
281 /* if krb is used, we (might) need the canonical host name */
282 hints.ai_flags |= AI_CANONNAME;
286 snprintf(sbuf, sizeof(sbuf), "%d", port);
289 error = getaddrinfo(hostname, sbufptr, &hints, &res);
291 infof(data, "getaddrinfo(3) failed for %s:%d\n", hostname, port);
295 dump_addrinfo(conn, res);
299 #endif /* !USE_THREADING_GETADDRINFO && !CURLRES_ARES */