1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2012, 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.
21 ***************************************************************************/
23 #include "curl_setup.h"
25 #include <curl/curl.h>
27 #ifdef HAVE_NETINET_IN_H
28 # include <netinet/in.h>
33 #ifdef HAVE_ARPA_INET_H
34 # include <arpa/inet.h>
42 #if defined(NETWARE) && defined(__NOVELL_LIBC__)
44 # define in_addr_t unsigned long
47 #include "curl_addrinfo.h"
48 #include "curl_inet_pton.h"
49 #include "curl_warnless.h"
51 #define _MPRINTF_REPLACE /* use our functions only */
52 #include <curl/mprintf.h>
54 #include "curl_memory.h"
55 /* The last #include file should be: */
56 #include "curl_memdebug.h"
62 * This is used to free a linked list of Curl_addrinfo structs along
63 * with all its associated allocated storage. This function should be
64 * called once for each successful call to Curl_getaddrinfo_ex() or to
65 * any function call which actually allocates a Curl_addrinfo struct.
68 #if defined(__INTEL_COMPILER) && (__INTEL_COMPILER == 910) && \
69 defined(__OPTIMIZE__) && defined(__unix__) && defined(__i386__)
70 /* workaround icc 9.1 optimizer issue */
71 # define vqualifier volatile
77 Curl_freeaddrinfo(Curl_addrinfo *cahead)
79 Curl_addrinfo *vqualifier canext;
82 for(ca = cahead; ca != NULL; ca = canext) {
88 free(ca->ai_canonname);
97 #ifdef HAVE_GETADDRINFO
99 * Curl_getaddrinfo_ex()
101 * This is a wrapper function around system's getaddrinfo(), with
102 * the only difference that instead of returning a linked list of
103 * addrinfo structs this one returns a linked list of Curl_addrinfo
104 * ones. The memory allocated by this function *MUST* be free'd with
105 * Curl_freeaddrinfo(). For each successful call to this function
106 * there must be an associated call later to Curl_freeaddrinfo().
108 * There should be no single call to system's getaddrinfo() in the
109 * whole library, any such call should be 'routed' through this one.
113 Curl_getaddrinfo_ex(const char *nodename,
114 const char *servname,
115 const struct addrinfo *hints,
116 Curl_addrinfo **result)
118 const struct addrinfo *ai;
119 struct addrinfo *aihead;
120 Curl_addrinfo *cafirst = NULL;
121 Curl_addrinfo *calast = NULL;
126 *result = NULL; /* assume failure */
128 error = getaddrinfo(nodename, servname, hints, &aihead);
132 /* traverse the addrinfo list */
134 for(ai = aihead; ai != NULL; ai = ai->ai_next) {
136 /* ignore elements with unsupported address family, */
137 /* settle family-specific sockaddr structure size. */
138 if(ai->ai_family == AF_INET)
139 ss_size = sizeof(struct sockaddr_in);
141 else if(ai->ai_family == AF_INET6)
142 ss_size = sizeof(struct sockaddr_in6);
147 /* ignore elements without required address info */
148 if((ai->ai_addr == NULL) || !(ai->ai_addrlen > 0))
151 /* ignore elements with bogus address size */
152 if((size_t)ai->ai_addrlen < ss_size)
155 if((ca = malloc(sizeof(Curl_addrinfo))) == NULL) {
160 /* copy each structure member individually, member ordering, */
161 /* size, or padding might be different for each platform. */
163 ca->ai_flags = ai->ai_flags;
164 ca->ai_family = ai->ai_family;
165 ca->ai_socktype = ai->ai_socktype;
166 ca->ai_protocol = ai->ai_protocol;
167 ca->ai_addrlen = (curl_socklen_t)ss_size;
169 ca->ai_canonname = NULL;
172 if((ca->ai_addr = malloc(ss_size)) == NULL) {
177 memcpy(ca->ai_addr, ai->ai_addr, ss_size);
179 if(ai->ai_canonname != NULL) {
180 if((ca->ai_canonname = strdup(ai->ai_canonname)) == NULL) {
188 /* if the return list is empty, this becomes the first element */
192 /* add this element last in the return list */
194 calast->ai_next = ca;
199 /* destroy the addrinfo list */
201 freeaddrinfo(aihead);
203 /* if we failed, also destroy the Curl_addrinfo list */
205 Curl_freeaddrinfo(cafirst);
210 /* rfc3493 conformant */
213 /* rfc3493 obsoleted */
217 SET_SOCKERRNO(error);
223 /* This is not a CURLcode */
226 #endif /* HAVE_GETADDRINFO */
232 * This function returns a pointer to the first element of a newly allocated
233 * Curl_addrinfo struct linked list filled with the data of a given hostent.
234 * Curl_addrinfo is meant to work like the addrinfo struct does for a IPv6
235 * stack, but usable also for IPv4, all hosts and environments.
237 * The memory allocated by this function *MUST* be free'd later on calling
238 * Curl_freeaddrinfo(). For each successful call to this function there
239 * must be an associated call later to Curl_freeaddrinfo().
241 * Curl_addrinfo defined in "lib/curl_addrinfo.h"
243 * struct Curl_addrinfo {
248 * curl_socklen_t ai_addrlen; * Follow rfc3493 struct addrinfo *
249 * char *ai_canonname;
250 * struct sockaddr *ai_addr;
251 * struct Curl_addrinfo *ai_next;
253 * typedef struct Curl_addrinfo Curl_addrinfo;
255 * hostent defined in <netdb.h>
262 * char **h_addr_list;
265 * for backward compatibility:
267 * #define h_addr h_addr_list[0]
271 Curl_he2ai(const struct hostent *he, int port)
274 Curl_addrinfo *prevai = NULL;
275 Curl_addrinfo *firstai = NULL;
276 struct sockaddr_in *addr;
278 struct sockaddr_in6 *addr6;
280 CURLcode result = CURLE_OK;
285 /* no input == no output! */
288 DEBUGASSERT((he->h_name != NULL) && (he->h_addr_list != NULL));
290 for(i=0; (curr = he->h_addr_list[i]) != NULL; i++) {
294 if(he->h_addrtype == AF_INET6)
295 ss_size = sizeof (struct sockaddr_in6);
298 ss_size = sizeof (struct sockaddr_in);
300 if((ai = calloc(1, sizeof(Curl_addrinfo))) == NULL) {
301 result = CURLE_OUT_OF_MEMORY;
304 if((ai->ai_canonname = strdup(he->h_name)) == NULL) {
305 result = CURLE_OUT_OF_MEMORY;
309 if((ai->ai_addr = calloc(1, ss_size)) == NULL) {
310 result = CURLE_OUT_OF_MEMORY;
311 free(ai->ai_canonname);
317 /* store the pointer we want to return from this function */
321 /* make the previous entry point to this */
322 prevai->ai_next = ai;
324 ai->ai_family = he->h_addrtype;
326 /* we return all names as STREAM, so when using this address for TFTP
327 the type must be ignored and conn->socktype be used instead! */
328 ai->ai_socktype = SOCK_STREAM;
330 ai->ai_addrlen = (curl_socklen_t)ss_size;
332 /* leave the rest of the struct filled with zero */
334 switch (ai->ai_family) {
336 addr = (void *)ai->ai_addr; /* storage area for this info */
338 memcpy(&addr->sin_addr, curr, sizeof(struct in_addr));
339 addr->sin_family = (unsigned short)(he->h_addrtype);
340 addr->sin_port = htons((unsigned short)port);
345 addr6 = (void *)ai->ai_addr; /* storage area for this info */
347 memcpy(&addr6->sin6_addr, curr, sizeof(struct in6_addr));
348 addr6->sin6_family = (unsigned short)(he->h_addrtype);
349 addr6->sin6_port = htons((unsigned short)port);
357 if(result != CURLE_OK) {
358 Curl_freeaddrinfo(firstai);
367 struct hostent hostentry;
371 struct in6_addr ina6;
374 char *h_addr_list[2];
381 * This function takes an internet address, in binary form, as input parameter
382 * along with its address family and the string version of the address, and it
383 * returns a Curl_addrinfo chain filled in correctly with information for the
388 Curl_ip2addr(int af, const void *inaddr, const char *hostname, int port)
392 #if defined(__VMS) && \
393 defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
394 #pragma pointer_size save
395 #pragma pointer_size short
396 #pragma message disable PTRMISMATCH
400 struct namebuff *buf;
405 DEBUGASSERT(inaddr && hostname);
407 buf = malloc(sizeof(struct namebuff));
411 hoststr = strdup(hostname);
419 addrsize = sizeof(struct in_addr);
420 addrentry = (void *)&buf->addrentry.ina4;
421 memcpy(addrentry, inaddr, sizeof(struct in_addr));
425 addrsize = sizeof(struct in6_addr);
426 addrentry = (void *)&buf->addrentry.ina6;
427 memcpy(addrentry, inaddr, sizeof(struct in6_addr));
439 h->h_addrtype = (short)af;
440 h->h_length = (short)addrsize;
441 h->h_addr_list = &buf->h_addr_list[0];
442 h->h_addr_list[0] = addrentry;
443 h->h_addr_list[1] = NULL; /* terminate list of entries */
445 #if defined(__VMS) && \
446 defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
447 #pragma pointer_size restore
448 #pragma message enable PTRMISMATCH
451 ai = Curl_he2ai(h, port);
460 * Given an IPv4 or IPv6 dotted string address, this converts it to a proper
461 * allocated Curl_addrinfo struct and returns it.
463 Curl_addrinfo *Curl_str2addr(char *address, int port)
466 if(Curl_inet_pton(AF_INET, address, &in) > 0)
467 /* This is a dotted IP address 123.123.123.123-style */
468 return Curl_ip2addr(AF_INET, &in, address, port);
472 if(Curl_inet_pton(AF_INET6, address, &in6) > 0)
473 /* This is a dotted IPv6 address ::1-style */
474 return Curl_ip2addr(AF_INET6, &in6, address, port);
477 return NULL; /* bad input format */
480 #if defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO)
482 * curl_dofreeaddrinfo()
484 * This is strictly for memory tracing and are using the same style as the
485 * family otherwise present in memdebug.c. I put these ones here since they
486 * require a bunch of structs I didn't want to include in memdebug.c
490 curl_dofreeaddrinfo(struct addrinfo *freethis,
491 int line, const char *source)
493 (freeaddrinfo)(freethis);
494 curl_memlog("ADDR %s:%d freeaddrinfo(%p)\n",
495 source, line, (void *)freethis);
497 #endif /* defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO) */
500 #if defined(CURLDEBUG) && defined(HAVE_GETADDRINFO)
502 * curl_dogetaddrinfo()
504 * This is strictly for memory tracing and are using the same style as the
505 * family otherwise present in memdebug.c. I put these ones here since they
506 * require a bunch of structs I didn't want to include in memdebug.c
510 curl_dogetaddrinfo(const char *hostname,
512 const struct addrinfo *hints,
513 struct addrinfo **result,
514 int line, const char *source)
516 int res=(getaddrinfo)(hostname, service, hints, result);
519 curl_memlog("ADDR %s:%d getaddrinfo() = %p\n",
520 source, line, (void *)*result);
522 curl_memlog("ADDR %s:%d getaddrinfo() failed\n",
526 #endif /* defined(CURLDEBUG) && defined(HAVE_GETADDRINFO) */