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>
28 #ifdef HAVE_SYS_SOCKET_H
29 # include <sys/socket.h>
31 #ifdef HAVE_NETINET_IN_H
32 # include <netinet/in.h>
37 #ifdef HAVE_ARPA_INET_H
38 # include <arpa/inet.h>
47 #if defined(NETWARE) && defined(__NOVELL_LIBC__)
49 # define in_addr_t unsigned long
52 #include "curl_addrinfo.h"
54 #define _MPRINTF_REPLACE /* use our functions only */
55 #include <curl/mprintf.h>
58 /* The last #include file should be: */
65 * This is used to free a linked list of Curl_addrinfo structs along
66 * with all its associated allocated storage. This function should be
67 * called once for each successful call to Curl_getaddrinfo_ex() or to
68 * any function call which actually allocates a Curl_addrinfo struct.
72 Curl_freeaddrinfo(Curl_addrinfo *cahead)
74 #if defined(__INTEL_COMPILER) && (__INTEL_COMPILER == 910) && \
75 defined(__unix__) && defined(__i386__)
76 /* workaround icc 9.1 optimizer issue */
77 volatile Curl_addrinfo * volatile ca;
78 volatile Curl_addrinfo * volatile canext;
80 Curl_addrinfo *ca, *canext;
83 for(ca = cahead; ca != NULL; ca = canext) {
89 free(ca->ai_canonname);
98 #ifdef HAVE_GETADDRINFO
100 * Curl_getaddrinfo_ex()
102 * This is a wrapper function around system's getaddrinfo(), with
103 * the only difference that instead of returning a linked list of
104 * addrinfo structs this one returns a linked list of Curl_addrinfo
105 * ones. The memory allocated by this function *MUST* be free'd with
106 * Curl_freeaddrinfo(). For each successful call to this function
107 * there must be an associated call later to Curl_freeaddrinfo().
109 * There should be no single call to system's getaddrinfo() in the
110 * whole library, any such call should be 'routed' through this one.
114 Curl_getaddrinfo_ex(const char *nodename,
115 const char *servname,
116 const struct addrinfo *hints,
117 Curl_addrinfo **result)
119 const struct addrinfo *ainext;
120 const struct addrinfo *ai;
121 struct addrinfo *aihead;
122 Curl_addrinfo *cafirst = NULL;
123 Curl_addrinfo *calast = NULL;
127 *result = NULL; /* assume failure */
129 error = getaddrinfo(nodename, servname, hints, &aihead);
133 for(ai = aihead; ai != NULL; ai = ainext) {
135 if((ca = malloc(sizeof(Curl_addrinfo))) == NULL) {
140 /* copy each structure member individually, member ordering, */
141 /* size, or padding might be different for each structure. */
143 ca->ai_flags = ai->ai_flags;
144 ca->ai_family = ai->ai_family;
145 ca->ai_socktype = ai->ai_socktype;
146 ca->ai_protocol = ai->ai_protocol;
149 ca->ai_canonname = NULL;
152 if((ai->ai_addrlen > 0) && (ai->ai_addr != NULL)) {
153 ca->ai_addrlen = ai->ai_addrlen;
154 if((ca->ai_addr = malloc(ca->ai_addrlen)) == NULL) {
159 memcpy(ca->ai_addr, ai->ai_addr, ca->ai_addrlen);
162 if(ai->ai_canonname != NULL) {
163 if((ca->ai_canonname = strdup(ai->ai_canonname)) == NULL) {
172 /* if the return list is empty, this becomes the first element */
176 /* add this element last in the return list */
178 calast->ai_next = ca;
181 /* fetch next element fom the addrinfo list */
182 ainext = ai->ai_next;
185 /* destroy the addrinfo list */
187 freeaddrinfo(aihead);
189 /* if we failed, also destroy the Curl_addrinfo list */
191 Curl_freeaddrinfo(cafirst);
197 /* This is not a CURLcode */
200 #endif /* HAVE_GETADDRINFO */
206 * This function returns a pointer to the first element of a newly allocated
207 * Curl_addrinfo struct linked list filled with the data of a given hostent.
208 * Curl_addrinfo is meant to work like the addrinfo struct does for a IPv6
209 * stack, but usable also for IPv4, all hosts and environments.
211 * The memory allocated by this function *MUST* be free'd later on calling
212 * Curl_freeaddrinfo(). For each successful call to this function there
213 * must be an associated call later to Curl_freeaddrinfo().
215 * Curl_addrinfo defined in "lib/curl_addrinfo.h"
217 * struct Curl_addrinfo {
222 * socklen_t ai_addrlen; * Follow rfc3493 struct addrinfo *
223 * char *ai_canonname;
224 * struct sockaddr *ai_addr;
225 * struct Curl_addrinfo *ai_next;
227 * typedef struct Curl_addrinfo Curl_addrinfo;
229 * hostent defined in <netdb.h>
236 * char **h_addr_list;
239 * for backward compatibility:
241 * #define h_addr h_addr_list[0]
245 Curl_he2ai(const struct hostent *he, int port)
248 Curl_addrinfo *prevai = NULL;
249 Curl_addrinfo *firstai = NULL;
250 struct sockaddr_in *addr;
252 struct sockaddr_in6 *addr6;
254 CURLcode result = CURLE_OK;
259 /* no input == no output! */
262 DEBUGASSERT((he->h_name != NULL) && (he->h_addr_list != NULL));
264 for(i=0; (curr = he->h_addr_list[i]) != NULL; i++) {
268 if (he->h_addrtype == AF_INET6)
269 ss_size = sizeof (struct sockaddr_in6);
272 ss_size = sizeof (struct sockaddr_in);
274 if((ai = calloc(1, sizeof(Curl_addrinfo))) == NULL) {
275 result = CURLE_OUT_OF_MEMORY;
278 if((ai->ai_canonname = strdup(he->h_name)) == NULL) {
279 result = CURLE_OUT_OF_MEMORY;
283 if((ai->ai_addr = calloc(1, ss_size)) == NULL) {
284 result = CURLE_OUT_OF_MEMORY;
285 free(ai->ai_canonname);
291 /* store the pointer we want to return from this function */
295 /* make the previous entry point to this */
296 prevai->ai_next = ai;
298 ai->ai_family = he->h_addrtype;
300 /* we return all names as STREAM, so when using this address for TFTP
301 the type must be ignored and conn->socktype be used instead! */
302 ai->ai_socktype = SOCK_STREAM;
304 ai->ai_addrlen = (int)ss_size;
306 /* leave the rest of the struct filled with zero */
308 switch (ai->ai_family) {
310 addr = (void *)ai->ai_addr; /* storage area for this info */
312 memcpy(&addr->sin_addr, curr, sizeof(struct in_addr));
313 addr->sin_family = (unsigned short)(he->h_addrtype);
314 addr->sin_port = htons((unsigned short)port);
319 addr6 = (void *)ai->ai_addr; /* storage area for this info */
321 memcpy(&addr6->sin6_addr, curr, sizeof(struct in6_addr));
322 addr6->sin6_family = (unsigned short)(he->h_addrtype);
323 addr6->sin6_port = htons((unsigned short)port);
331 if(result != CURLE_OK) {
332 Curl_freeaddrinfo(firstai);
341 struct hostent hostentry;
345 struct in6_addr ina6;
348 char *h_addr_list[2];
355 * This function takes an internet address, in binary form, as input parameter
356 * along with its address family and the string version of the address, and it
357 * returns a Curl_addrinfo chain filled in correctly with information for the
362 Curl_ip2addr(int af, const void *inaddr, const char *hostname, int port)
366 #if defined(VMS) && \
367 defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
368 #pragma pointer_size save
369 #pragma pointer_size short
370 #pragma message disable PTRMISMATCH
374 struct namebuff *buf;
379 DEBUGASSERT(inaddr && hostname);
381 buf = malloc(sizeof(struct namebuff));
385 hoststr = strdup(hostname);
393 addrsize = sizeof(struct in_addr);
394 addrentry = (void *)&buf->addrentry.ina4;
395 memcpy(addrentry, inaddr, sizeof(struct in_addr));
399 addrsize = sizeof(struct in6_addr);
400 addrentry = (void *)&buf->addrentry.ina6;
401 memcpy(addrentry, inaddr, sizeof(struct in6_addr));
413 h->h_addrtype = (short)af;
414 h->h_length = (short)addrsize;
415 h->h_addr_list = &buf->h_addr_list[0];
416 h->h_addr_list[0] = addrentry;
417 h->h_addr_list[1] = NULL; /* terminate list of entries */
419 #if defined(VMS) && \
420 defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
421 #pragma pointer_size restore
422 #pragma message enable PTRMISMATCH
425 ai = Curl_he2ai(h, port);
434 #if defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO)
436 * curl_dofreeaddrinfo()
438 * This is strictly for memory tracing and are using the same style as the
439 * family otherwise present in memdebug.c. I put these ones here since they
440 * require a bunch of structs I didn't wanna include in memdebug.c
444 curl_dofreeaddrinfo(struct addrinfo *freethis,
445 int line, const char *source)
447 (freeaddrinfo)(freethis);
449 fprintf(logfile, "ADDR %s:%d freeaddrinfo(%p)\n",
450 source, line, (void *)freethis);
452 #endif /* defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO) */
455 #if defined(CURLDEBUG) && defined(HAVE_GETADDRINFO)
457 * curl_dogetaddrinfo()
459 * This is strictly for memory tracing and are using the same style as the
460 * family otherwise present in memdebug.c. I put these ones here since they
461 * require a bunch of structs I didn't wanna include in memdebug.c
465 curl_dogetaddrinfo(const char *hostname,
467 const struct addrinfo *hints,
468 struct addrinfo **result,
469 int line, const char *source)
471 int res=(getaddrinfo)(hostname, service, hints, result);
475 fprintf(logfile, "ADDR %s:%d getaddrinfo() = %p\n",
476 source, line, (void *)*result);
480 fprintf(logfile, "ADDR %s:%d getaddrinfo() failed\n",
485 #endif /* defined(CURLDEBUG) && defined(HAVE_GETADDRINFO) */