1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2009, 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 ***************************************************************************/
26 #include <curl/curl.h>
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>
50 #if defined(NETWARE) && defined(__NOVELL_LIBC__)
52 # define in_addr_t unsigned long
55 #include "curl_addrinfo.h"
57 #define _MPRINTF_REPLACE /* use our functions only */
58 #include <curl/mprintf.h>
61 /* The last #include file should be: */
68 * This is used to free a linked list of Curl_addrinfo structs along
69 * with all its associated allocated storage. This function should be
70 * called once for each successful call to Curl_getaddrinfo_ex() or to
71 * any function call which actually allocates a Curl_addrinfo struct.
75 Curl_freeaddrinfo(Curl_addrinfo *cahead)
77 Curl_addrinfo *ca, *canext;
79 for(ca = cahead; ca != NULL; ca = canext) {
85 free(ca->ai_canonname);
94 #ifdef HAVE_GETADDRINFO
96 * Curl_getaddrinfo_ex()
98 * This is a wrapper function around system's getaddrinfo(), with
99 * the only difference that instead of returning a linked list of
100 * addrinfo structs this one returns a linked list of Curl_addrinfo
101 * ones. The memory allocated by this function *MUST* be free'd with
102 * Curl_freeaddrinfo(). For each successful call to this function
103 * there must be an associated call later to Curl_freeaddrinfo().
105 * There should be no single call to system's getaddrinfo() in the
106 * whole library, any such call should be 'routed' through this one.
110 Curl_getaddrinfo_ex(const char *nodename,
111 const char *servname,
112 const struct addrinfo *hints,
113 Curl_addrinfo **result)
115 const struct addrinfo *ainext;
116 const struct addrinfo *ai;
117 struct addrinfo *aihead;
118 Curl_addrinfo *cafirst = NULL;
119 Curl_addrinfo *calast = NULL;
123 *result = NULL; /* assume failure */
125 error = getaddrinfo(nodename, servname, hints, &aihead);
129 for(ai = aihead; ai != NULL; ai = ainext) {
131 if((ca = malloc(sizeof(Curl_addrinfo))) == NULL) {
136 /* copy each structure member individually, member ordering, */
137 /* size, or padding might be different for each structure. */
139 ca->ai_flags = ai->ai_flags;
140 ca->ai_family = ai->ai_family;
141 ca->ai_socktype = ai->ai_socktype;
142 ca->ai_protocol = ai->ai_protocol;
145 ca->ai_canonname = NULL;
148 if((ai->ai_addrlen > 0) && (ai->ai_addr != NULL)) {
149 ca->ai_addrlen = ai->ai_addrlen;
150 if((ca->ai_addr = malloc(ca->ai_addrlen)) == NULL) {
155 memcpy(ca->ai_addr, ai->ai_addr, ca->ai_addrlen);
158 if(ai->ai_canonname != NULL) {
159 if((ca->ai_canonname = strdup(ai->ai_canonname)) == NULL) {
168 /* if the return list is empty, this becomes the first element */
172 /* add this element last in the return list */
174 calast->ai_next = ca;
177 /* fetch next element fom the addrinfo list */
178 ainext = ai->ai_next;
181 /* destroy the addrinfo list */
183 freeaddrinfo(aihead);
185 /* if we failed, also destroy the Curl_addrinfo list */
187 Curl_freeaddrinfo(cafirst);
193 /* This is not a CURLcode */
196 #endif /* HAVE_GETADDRINFO */
202 * This function returns a pointer to the first element of a newly allocated
203 * Curl_addrinfo struct linked list filled with the data of a given hostent.
204 * Curl_addrinfo is meant to work like the addrinfo struct does for a IPv6
205 * stack, but usable also for IPv4, all hosts and environments.
207 * The memory allocated by this function *MUST* be free'd later on calling
208 * Curl_freeaddrinfo(). For each successful call to this function there
209 * must be an associated call later to Curl_freeaddrinfo().
211 * Curl_addrinfo defined in "lib/curl_addrinfo.h"
213 * struct Curl_addrinfo {
218 * socklen_t ai_addrlen; * Follow rfc3493 struct addrinfo *
219 * char *ai_canonname;
220 * struct sockaddr *ai_addr;
221 * struct Curl_addrinfo *ai_next;
223 * typedef struct Curl_addrinfo Curl_addrinfo;
225 * hostent defined in <netdb.h>
232 * char **h_addr_list;
235 * for backward compatibility:
237 * #define h_addr h_addr_list[0]
241 Curl_he2ai(const struct hostent *he, int port)
244 Curl_addrinfo *prevai = NULL;
245 Curl_addrinfo *firstai = NULL;
246 struct sockaddr_in *addr;
248 struct sockaddr_in6 *addr6;
250 CURLcode result = CURLE_OK;
255 /* no input == no output! */
258 DEBUGASSERT((he->h_name != NULL) && (he->h_addr_list != NULL));
260 for(i=0; (curr = he->h_addr_list[i]) != NULL; i++) {
264 if (he->h_addrtype == AF_INET6)
265 ss_size = sizeof (struct sockaddr_in6);
268 ss_size = sizeof (struct sockaddr_in);
270 if((ai = calloc(1, sizeof(Curl_addrinfo))) == NULL) {
271 result = CURLE_OUT_OF_MEMORY;
274 if((ai->ai_canonname = strdup(he->h_name)) == NULL) {
275 result = CURLE_OUT_OF_MEMORY;
279 if((ai->ai_addr = calloc(1, ss_size)) == NULL) {
280 result = CURLE_OUT_OF_MEMORY;
281 free(ai->ai_canonname);
287 /* store the pointer we want to return from this function */
291 /* make the previous entry point to this */
292 prevai->ai_next = ai;
294 ai->ai_family = he->h_addrtype;
296 /* we return all names as STREAM, so when using this address for TFTP
297 the type must be ignored and conn->socktype be used instead! */
298 ai->ai_socktype = SOCK_STREAM;
300 ai->ai_addrlen = ss_size;
302 /* leave the rest of the struct filled with zero */
304 switch (ai->ai_family) {
306 addr = (void *)ai->ai_addr; /* storage area for this info */
308 memcpy(&addr->sin_addr, curr, sizeof(struct in_addr));
309 addr->sin_family = (unsigned short)(he->h_addrtype);
310 addr->sin_port = htons((unsigned short)port);
315 addr6 = (void *)ai->ai_addr; /* storage area for this info */
317 memcpy(&addr6->sin6_addr, curr, sizeof(struct in6_addr));
318 addr6->sin6_family = (unsigned short)(he->h_addrtype);
319 addr6->sin6_port = htons((unsigned short)port);
327 if(result != CURLE_OK) {
328 Curl_freeaddrinfo(firstai);
337 struct hostent hostentry;
341 struct in6_addr ina6;
344 char *h_addr_list[2];
351 * This function takes an internet address, in binary form, as input parameter
352 * along with its address family and the string version of the address, and it
353 * returns a Curl_addrinfo chain filled in correctly with information for the
358 Curl_ip2addr(int af, const void *inaddr, const char *hostname, int port)
362 #if defined(VMS) && \
363 defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
364 #pragma pointer_size save
365 #pragma pointer_size short
366 #pragma message disable PTRMISMATCH
370 struct namebuff *buf;
375 DEBUGASSERT(inaddr && hostname);
377 buf = malloc(sizeof(struct namebuff));
381 hoststr = strdup(hostname);
389 addrsize = sizeof(struct in_addr);
390 addrentry = (void *)&buf->addrentry.ina4;
391 memcpy(addrentry, inaddr, sizeof(struct in_addr));
395 addrsize = sizeof(struct in6_addr);
396 addrentry = (void *)&buf->addrentry.ina6;
397 memcpy(addrentry, inaddr, sizeof(struct in6_addr));
409 h->h_addrtype = (short)af;
410 h->h_length = (short)addrsize;
411 h->h_addr_list = &buf->h_addr_list[0];
412 h->h_addr_list[0] = addrentry;
413 h->h_addr_list[1] = NULL; /* terminate list of entries */
415 #if defined(VMS) && \
416 defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
417 #pragma pointer_size restore
418 #pragma message enable PTRMISMATCH
421 ai = Curl_he2ai(h, port);
430 #if defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO)
432 * curl_dofreeaddrinfo()
434 * This is strictly for memory tracing and are using the same style as the
435 * family otherwise present in memdebug.c. I put these ones here since they
436 * require a bunch of structs I didn't wanna include in memdebug.c
440 curl_dofreeaddrinfo(struct addrinfo *freethis,
441 int line, const char *source)
443 (freeaddrinfo)(freethis);
445 fprintf(logfile, "ADDR %s:%d freeaddrinfo(%p)\n",
446 source, line, (void *)freethis);
448 #endif /* defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO) */
451 #if defined(CURLDEBUG) && defined(HAVE_GETADDRINFO)
453 * curl_dogetaddrinfo()
455 * This is strictly for memory tracing and are using the same style as the
456 * family otherwise present in memdebug.c. I put these ones here since they
457 * require a bunch of structs I didn't wanna include in memdebug.c
461 curl_dogetaddrinfo(const char *hostname,
463 const struct addrinfo *hints,
464 struct addrinfo **result,
465 int line, const char *source)
467 int res=(getaddrinfo)(hostname, service, hints, result);
471 fprintf(logfile, "ADDR %s:%d getaddrinfo() = %p\n",
472 source, line, (void *)*result);
476 fprintf(logfile, "ADDR %s:%d getaddrinfo() failed\n",
481 #endif /* defined(CURLDEBUG) && defined(HAVE_GETADDRINFO) */