1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2010, 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 ***************************************************************************/
25 #include <curl/curl.h>
27 #ifdef HAVE_SYS_SOCKET_H
28 # include <sys/socket.h>
30 #ifdef HAVE_NETINET_IN_H
31 # include <netinet/in.h>
36 #ifdef HAVE_ARPA_INET_H
37 # include <arpa/inet.h>
46 #if defined(NETWARE) && defined(__NOVELL_LIBC__)
48 # define in_addr_t unsigned long
51 #include "curl_addrinfo.h"
52 #include "inet_pton.h"
54 #define _MPRINTF_REPLACE /* use our functions only */
55 #include <curl/mprintf.h>
57 #include "curl_memory.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.
71 #if defined(__INTEL_COMPILER) && (__INTEL_COMPILER == 910) && \
72 defined(__OPTIMIZE__) && defined(__unix__) && defined(__i386__)
73 /* workaround icc 9.1 optimizer issue */
74 # define vqualifier volatile
80 Curl_freeaddrinfo(Curl_addrinfo *cahead)
82 Curl_addrinfo *vqualifier canext;
85 for(ca = cahead; ca != NULL; ca = canext) {
91 free(ca->ai_canonname);
100 #ifdef HAVE_GETADDRINFO
102 * Curl_getaddrinfo_ex()
104 * This is a wrapper function around system's getaddrinfo(), with
105 * the only difference that instead of returning a linked list of
106 * addrinfo structs this one returns a linked list of Curl_addrinfo
107 * ones. The memory allocated by this function *MUST* be free'd with
108 * Curl_freeaddrinfo(). For each successful call to this function
109 * there must be an associated call later to Curl_freeaddrinfo().
111 * There should be no single call to system's getaddrinfo() in the
112 * whole library, any such call should be 'routed' through this one.
116 Curl_getaddrinfo_ex(const char *nodename,
117 const char *servname,
118 const struct addrinfo *hints,
119 Curl_addrinfo **result)
121 const struct addrinfo *ai;
122 struct addrinfo *aihead;
123 Curl_addrinfo *cafirst = NULL;
124 Curl_addrinfo *calast = NULL;
129 *result = NULL; /* assume failure */
131 error = getaddrinfo(nodename, servname, hints, &aihead);
135 /* traverse the addrinfo list */
137 for(ai = aihead; ai != NULL; ai = ai->ai_next) {
139 /* ignore elements with unsupported address family, */
140 /* settle family-specific sockaddr structure size. */
141 if(ai->ai_family == AF_INET)
142 ss_size = sizeof(struct sockaddr_in);
144 else if(ai->ai_family == AF_INET6)
145 ss_size = sizeof(struct sockaddr_in6);
150 /* ignore elements without required address info */
151 if((ai->ai_addr == NULL) || !(ai->ai_addrlen > 0))
154 /* ignore elements with bogus address size */
155 if((size_t)ai->ai_addrlen < ss_size)
158 if((ca = malloc(sizeof(Curl_addrinfo))) == NULL) {
163 /* copy each structure member individually, member ordering, */
164 /* size, or padding might be different for each platform. */
166 ca->ai_flags = ai->ai_flags;
167 ca->ai_family = ai->ai_family;
168 ca->ai_socktype = ai->ai_socktype;
169 ca->ai_protocol = ai->ai_protocol;
170 ca->ai_addrlen = (curl_socklen_t)ss_size;
172 ca->ai_canonname = NULL;
175 if((ca->ai_addr = malloc(ss_size)) == NULL) {
180 memcpy(ca->ai_addr, ai->ai_addr, ss_size);
182 if(ai->ai_canonname != NULL) {
183 if((ca->ai_canonname = strdup(ai->ai_canonname)) == NULL) {
191 /* if the return list is empty, this becomes the first element */
195 /* add this element last in the return list */
197 calast->ai_next = ca;
202 /* destroy the addrinfo list */
204 freeaddrinfo(aihead);
206 /* if we failed, also destroy the Curl_addrinfo list */
208 Curl_freeaddrinfo(cafirst);
214 /* This is not a CURLcode */
217 #endif /* HAVE_GETADDRINFO */
223 * This function returns a pointer to the first element of a newly allocated
224 * Curl_addrinfo struct linked list filled with the data of a given hostent.
225 * Curl_addrinfo is meant to work like the addrinfo struct does for a IPv6
226 * stack, but usable also for IPv4, all hosts and environments.
228 * The memory allocated by this function *MUST* be free'd later on calling
229 * Curl_freeaddrinfo(). For each successful call to this function there
230 * must be an associated call later to Curl_freeaddrinfo().
232 * Curl_addrinfo defined in "lib/curl_addrinfo.h"
234 * struct Curl_addrinfo {
239 * curl_socklen_t ai_addrlen; * Follow rfc3493 struct addrinfo *
240 * char *ai_canonname;
241 * struct sockaddr *ai_addr;
242 * struct Curl_addrinfo *ai_next;
244 * typedef struct Curl_addrinfo Curl_addrinfo;
246 * hostent defined in <netdb.h>
253 * char **h_addr_list;
256 * for backward compatibility:
258 * #define h_addr h_addr_list[0]
262 Curl_he2ai(const struct hostent *he, int port)
265 Curl_addrinfo *prevai = NULL;
266 Curl_addrinfo *firstai = NULL;
267 struct sockaddr_in *addr;
269 struct sockaddr_in6 *addr6;
271 CURLcode result = CURLE_OK;
276 /* no input == no output! */
279 DEBUGASSERT((he->h_name != NULL) && (he->h_addr_list != NULL));
281 for(i=0; (curr = he->h_addr_list[i]) != NULL; i++) {
285 if (he->h_addrtype == AF_INET6)
286 ss_size = sizeof (struct sockaddr_in6);
289 ss_size = sizeof (struct sockaddr_in);
291 if((ai = calloc(1, sizeof(Curl_addrinfo))) == NULL) {
292 result = CURLE_OUT_OF_MEMORY;
295 if((ai->ai_canonname = strdup(he->h_name)) == NULL) {
296 result = CURLE_OUT_OF_MEMORY;
300 if((ai->ai_addr = calloc(1, ss_size)) == NULL) {
301 result = CURLE_OUT_OF_MEMORY;
302 free(ai->ai_canonname);
308 /* store the pointer we want to return from this function */
312 /* make the previous entry point to this */
313 prevai->ai_next = ai;
315 ai->ai_family = he->h_addrtype;
317 /* we return all names as STREAM, so when using this address for TFTP
318 the type must be ignored and conn->socktype be used instead! */
319 ai->ai_socktype = SOCK_STREAM;
321 ai->ai_addrlen = (curl_socklen_t)ss_size;
323 /* leave the rest of the struct filled with zero */
325 switch (ai->ai_family) {
327 addr = (void *)ai->ai_addr; /* storage area for this info */
329 memcpy(&addr->sin_addr, curr, sizeof(struct in_addr));
330 addr->sin_family = (unsigned short)(he->h_addrtype);
331 addr->sin_port = htons((unsigned short)port);
336 addr6 = (void *)ai->ai_addr; /* storage area for this info */
338 memcpy(&addr6->sin6_addr, curr, sizeof(struct in6_addr));
339 addr6->sin6_family = (unsigned short)(he->h_addrtype);
340 addr6->sin6_port = htons((unsigned short)port);
348 if(result != CURLE_OK) {
349 Curl_freeaddrinfo(firstai);
358 struct hostent hostentry;
362 struct in6_addr ina6;
365 char *h_addr_list[2];
372 * This function takes an internet address, in binary form, as input parameter
373 * along with its address family and the string version of the address, and it
374 * returns a Curl_addrinfo chain filled in correctly with information for the
379 Curl_ip2addr(int af, const void *inaddr, const char *hostname, int port)
383 #if defined(__VMS) && \
384 defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
385 #pragma pointer_size save
386 #pragma pointer_size short
387 #pragma message disable PTRMISMATCH
391 struct namebuff *buf;
396 DEBUGASSERT(inaddr && hostname);
398 buf = malloc(sizeof(struct namebuff));
402 hoststr = strdup(hostname);
410 addrsize = sizeof(struct in_addr);
411 addrentry = (void *)&buf->addrentry.ina4;
412 memcpy(addrentry, inaddr, sizeof(struct in_addr));
416 addrsize = sizeof(struct in6_addr);
417 addrentry = (void *)&buf->addrentry.ina6;
418 memcpy(addrentry, inaddr, sizeof(struct in6_addr));
430 h->h_addrtype = (short)af;
431 h->h_length = (short)addrsize;
432 h->h_addr_list = &buf->h_addr_list[0];
433 h->h_addr_list[0] = addrentry;
434 h->h_addr_list[1] = NULL; /* terminate list of entries */
436 #if defined(__VMS) && \
437 defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
438 #pragma pointer_size restore
439 #pragma message enable PTRMISMATCH
442 ai = Curl_he2ai(h, port);
451 * Given an IPv4 or IPv6 dotted string address, this converts it to a proper
452 * allocated Curl_addrinfo struct and returns it.
454 Curl_addrinfo *Curl_str2addr(char *address, int port)
457 if(Curl_inet_pton(AF_INET, address, &in) > 0)
458 /* This is a dotted IP address 123.123.123.123-style */
459 return Curl_ip2addr(AF_INET, &in, address, port);
463 if(Curl_inet_pton(AF_INET6, address, &in6) > 0)
464 /* This is a dotted IPv6 address ::1-style */
465 return Curl_ip2addr(AF_INET6, &in6, address, port);
468 return NULL; /* bad input format */
471 #if defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO)
473 * curl_dofreeaddrinfo()
475 * This is strictly for memory tracing and are using the same style as the
476 * family otherwise present in memdebug.c. I put these ones here since they
477 * require a bunch of structs I didn't wanna include in memdebug.c
481 curl_dofreeaddrinfo(struct addrinfo *freethis,
482 int line, const char *source)
484 (freeaddrinfo)(freethis);
485 curl_memlog("ADDR %s:%d freeaddrinfo(%p)\n",
486 source, line, (void *)freethis);
488 #endif /* defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO) */
491 #if defined(CURLDEBUG) && defined(HAVE_GETADDRINFO)
493 * curl_dogetaddrinfo()
495 * This is strictly for memory tracing and are using the same style as the
496 * family otherwise present in memdebug.c. I put these ones here since they
497 * require a bunch of structs I didn't wanna include in memdebug.c
501 curl_dogetaddrinfo(const char *hostname,
503 const struct addrinfo *hints,
504 struct addrinfo **result,
505 int line, const char *source)
507 int res=(getaddrinfo)(hostname, service, hints, result);
510 curl_memlog("ADDR %s:%d getaddrinfo() = %p\n",
511 source, line, (void *)*result);
513 curl_memlog("ADDR %s:%d getaddrinfo() failed\n",
517 #endif /* defined(CURLDEBUG) && defined(HAVE_GETADDRINFO) */