1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2016, 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 https://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>
45 #if defined(NETWARE) && defined(__NOVELL_LIBC__)
47 # define in_addr_t unsigned long
50 #include "curl_addrinfo.h"
51 #include "inet_pton.h"
53 /* The last 3 #include files should be in this order */
54 #include "curl_printf.h"
55 #include "curl_memory.h"
61 * This is used to free a linked list of Curl_addrinfo structs along
62 * with all its associated allocated storage. This function should be
63 * called once for each successful call to Curl_getaddrinfo_ex() or to
64 * any function call which actually allocates a Curl_addrinfo struct.
67 #if defined(__INTEL_COMPILER) && (__INTEL_COMPILER == 910) && \
68 defined(__OPTIMIZE__) && defined(__unix__) && defined(__i386__)
69 /* workaround icc 9.1 optimizer issue */
70 # define vqualifier volatile
76 Curl_freeaddrinfo(Curl_addrinfo *cahead)
78 Curl_addrinfo *vqualifier canext;
81 for(ca = cahead; ca != NULL; ca = canext) {
83 free(ca->ai_canonname);
91 #ifdef HAVE_GETADDRINFO
93 * Curl_getaddrinfo_ex()
95 * This is a wrapper function around system's getaddrinfo(), with
96 * the only difference that instead of returning a linked list of
97 * addrinfo structs this one returns a linked list of Curl_addrinfo
98 * ones. The memory allocated by this function *MUST* be free'd with
99 * Curl_freeaddrinfo(). For each successful call to this function
100 * there must be an associated call later to Curl_freeaddrinfo().
102 * There should be no single call to system's getaddrinfo() in the
103 * whole library, any such call should be 'routed' through this one.
107 Curl_getaddrinfo_ex(const char *nodename,
108 const char *servname,
109 const struct addrinfo *hints,
110 Curl_addrinfo **result)
112 const struct addrinfo *ai;
113 struct addrinfo *aihead;
114 Curl_addrinfo *cafirst = NULL;
115 Curl_addrinfo *calast = NULL;
120 *result = NULL; /* assume failure */
122 error = getaddrinfo(nodename, servname, hints, &aihead);
126 /* traverse the addrinfo list */
128 for(ai = aihead; ai != NULL; ai = ai->ai_next) {
130 /* ignore elements with unsupported address family, */
131 /* settle family-specific sockaddr structure size. */
132 if(ai->ai_family == AF_INET)
133 ss_size = sizeof(struct sockaddr_in);
135 else if(ai->ai_family == AF_INET6)
136 ss_size = sizeof(struct sockaddr_in6);
141 /* ignore elements without required address info */
142 if((ai->ai_addr == NULL) || !(ai->ai_addrlen > 0))
145 /* ignore elements with bogus address size */
146 if((size_t)ai->ai_addrlen < ss_size)
149 if((ca = malloc(sizeof(Curl_addrinfo))) == NULL) {
154 /* copy each structure member individually, member ordering, */
155 /* size, or padding might be different for each platform. */
157 ca->ai_flags = ai->ai_flags;
158 ca->ai_family = ai->ai_family;
159 ca->ai_socktype = ai->ai_socktype;
160 ca->ai_protocol = ai->ai_protocol;
161 ca->ai_addrlen = (curl_socklen_t)ss_size;
163 ca->ai_canonname = NULL;
166 if((ca->ai_addr = malloc(ss_size)) == NULL) {
171 memcpy(ca->ai_addr, ai->ai_addr, ss_size);
173 if(ai->ai_canonname != NULL) {
174 if((ca->ai_canonname = strdup(ai->ai_canonname)) == NULL) {
182 /* if the return list is empty, this becomes the first element */
186 /* add this element last in the return list */
188 calast->ai_next = ca;
193 /* destroy the addrinfo list */
195 freeaddrinfo(aihead);
197 /* if we failed, also destroy the Curl_addrinfo list */
199 Curl_freeaddrinfo(cafirst);
204 /* rfc3493 conformant */
207 /* rfc3493 obsoleted */
211 SET_SOCKERRNO(error);
217 /* This is not a CURLcode */
220 #endif /* HAVE_GETADDRINFO */
226 * This function returns a pointer to the first element of a newly allocated
227 * Curl_addrinfo struct linked list filled with the data of a given hostent.
228 * Curl_addrinfo is meant to work like the addrinfo struct does for a IPv6
229 * stack, but usable also for IPv4, all hosts and environments.
231 * The memory allocated by this function *MUST* be free'd later on calling
232 * Curl_freeaddrinfo(). For each successful call to this function there
233 * must be an associated call later to Curl_freeaddrinfo().
235 * Curl_addrinfo defined in "lib/curl_addrinfo.h"
237 * struct Curl_addrinfo {
242 * curl_socklen_t ai_addrlen; * Follow rfc3493 struct addrinfo *
243 * char *ai_canonname;
244 * struct sockaddr *ai_addr;
245 * struct Curl_addrinfo *ai_next;
247 * typedef struct Curl_addrinfo Curl_addrinfo;
249 * hostent defined in <netdb.h>
256 * char **h_addr_list;
259 * for backward compatibility:
261 * #define h_addr h_addr_list[0]
265 Curl_he2ai(const struct hostent *he, int port)
268 Curl_addrinfo *prevai = NULL;
269 Curl_addrinfo *firstai = NULL;
270 struct sockaddr_in *addr;
272 struct sockaddr_in6 *addr6;
274 CURLcode result = CURLE_OK;
279 /* no input == no output! */
282 DEBUGASSERT((he->h_name != NULL) && (he->h_addr_list != NULL));
284 for(i=0; (curr = he->h_addr_list[i]) != NULL; i++) {
288 if(he->h_addrtype == AF_INET6)
289 ss_size = sizeof (struct sockaddr_in6);
292 ss_size = sizeof (struct sockaddr_in);
294 if((ai = calloc(1, sizeof(Curl_addrinfo))) == NULL) {
295 result = CURLE_OUT_OF_MEMORY;
298 if((ai->ai_canonname = strdup(he->h_name)) == NULL) {
299 result = CURLE_OUT_OF_MEMORY;
303 if((ai->ai_addr = calloc(1, ss_size)) == NULL) {
304 result = CURLE_OUT_OF_MEMORY;
305 free(ai->ai_canonname);
311 /* store the pointer we want to return from this function */
315 /* make the previous entry point to this */
316 prevai->ai_next = ai;
318 ai->ai_family = he->h_addrtype;
320 /* we return all names as STREAM, so when using this address for TFTP
321 the type must be ignored and conn->socktype be used instead! */
322 ai->ai_socktype = SOCK_STREAM;
324 ai->ai_addrlen = (curl_socklen_t)ss_size;
326 /* leave the rest of the struct filled with zero */
328 switch (ai->ai_family) {
330 addr = (void *)ai->ai_addr; /* storage area for this info */
332 memcpy(&addr->sin_addr, curr, sizeof(struct in_addr));
333 addr->sin_family = (unsigned short)(he->h_addrtype);
334 addr->sin_port = htons((unsigned short)port);
339 addr6 = (void *)ai->ai_addr; /* storage area for this info */
341 memcpy(&addr6->sin6_addr, curr, sizeof(struct in6_addr));
342 addr6->sin6_family = (unsigned short)(he->h_addrtype);
343 addr6->sin6_port = htons((unsigned short)port);
352 Curl_freeaddrinfo(firstai);
361 struct hostent hostentry;
365 struct in6_addr ina6;
368 char *h_addr_list[2];
375 * This function takes an internet address, in binary form, as input parameter
376 * along with its address family and the string version of the address, and it
377 * returns a Curl_addrinfo chain filled in correctly with information for the
382 Curl_ip2addr(int af, const void *inaddr, const char *hostname, int port)
386 #if defined(__VMS) && \
387 defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
388 #pragma pointer_size save
389 #pragma pointer_size short
390 #pragma message disable PTRMISMATCH
394 struct namebuff *buf;
399 DEBUGASSERT(inaddr && hostname);
401 buf = malloc(sizeof(struct namebuff));
405 hoststr = strdup(hostname);
413 addrsize = sizeof(struct in_addr);
414 addrentry = (void *)&buf->addrentry.ina4;
415 memcpy(addrentry, inaddr, sizeof(struct in_addr));
419 addrsize = sizeof(struct in6_addr);
420 addrentry = (void *)&buf->addrentry.ina6;
421 memcpy(addrentry, inaddr, sizeof(struct in6_addr));
433 h->h_addrtype = (short)af;
434 h->h_length = (short)addrsize;
435 h->h_addr_list = &buf->h_addr_list[0];
436 h->h_addr_list[0] = addrentry;
437 h->h_addr_list[1] = NULL; /* terminate list of entries */
439 #if defined(__VMS) && \
440 defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
441 #pragma pointer_size restore
442 #pragma message enable PTRMISMATCH
445 ai = Curl_he2ai(h, port);
454 * Given an IPv4 or IPv6 dotted string address, this converts it to a proper
455 * allocated Curl_addrinfo struct and returns it.
457 Curl_addrinfo *Curl_str2addr(char *address, int port)
460 if(Curl_inet_pton(AF_INET, address, &in) > 0)
461 /* This is a dotted IP address 123.123.123.123-style */
462 return Curl_ip2addr(AF_INET, &in, address, port);
466 if(Curl_inet_pton(AF_INET6, address, &in6) > 0)
467 /* This is a dotted IPv6 address ::1-style */
468 return Curl_ip2addr(AF_INET6, &in6, address, port);
471 return NULL; /* bad input format */
474 #ifdef USE_UNIX_SOCKETS
476 * Given a path to a Unix domain socket, return a newly allocated Curl_addrinfo
477 * struct initialized with this path.
479 Curl_addrinfo *Curl_unix2addr(const char *path)
482 struct sockaddr_un *sa_un;
485 ai = calloc(1, sizeof(Curl_addrinfo));
488 if((ai->ai_addr = calloc(1, sizeof(struct sockaddr_un))) == NULL) {
492 /* sun_path must be able to store the NUL-terminated path */
493 path_len = strlen(path);
494 if(path_len >= sizeof(sa_un->sun_path)) {
500 ai->ai_family = AF_UNIX;
501 ai->ai_socktype = SOCK_STREAM; /* assume reliable transport for HTTP */
502 ai->ai_addrlen = (curl_socklen_t) sizeof(struct sockaddr_un);
503 sa_un = (void *) ai->ai_addr;
504 sa_un->sun_family = AF_UNIX;
505 memcpy(sa_un->sun_path, path, path_len + 1); /* copy NUL byte */
510 #if defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO)
512 * curl_dofreeaddrinfo()
514 * This is strictly for memory tracing and are using the same style as the
515 * family otherwise present in memdebug.c. I put these ones here since they
516 * require a bunch of structs I didn't want to include in memdebug.c
520 curl_dofreeaddrinfo(struct addrinfo *freethis,
521 int line, const char *source)
524 lwip_freeaddrinfo(freethis);
526 (freeaddrinfo)(freethis);
528 curl_memlog("ADDR %s:%d freeaddrinfo(%p)\n",
529 source, line, (void *)freethis);
531 #endif /* defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO) */
534 #if defined(CURLDEBUG) && defined(HAVE_GETADDRINFO)
536 * curl_dogetaddrinfo()
538 * This is strictly for memory tracing and are using the same style as the
539 * family otherwise present in memdebug.c. I put these ones here since they
540 * require a bunch of structs I didn't want to include in memdebug.c
544 curl_dogetaddrinfo(const char *hostname,
546 const struct addrinfo *hints,
547 struct addrinfo **result,
548 int line, const char *source)
551 int res=lwip_getaddrinfo(hostname, service, hints, result);
553 int res=(getaddrinfo)(hostname, service, hints, result);
557 curl_memlog("ADDR %s:%d getaddrinfo() = %p\n",
558 source, line, (void *)*result);
560 curl_memlog("ADDR %s:%d getaddrinfo() failed\n",
564 #endif /* defined(CURLDEBUG) && defined(HAVE_GETADDRINFO) */
566 #if defined(HAVE_GETADDRINFO) && defined(USE_RESOLVE_ON_IPS)
568 * Work-arounds the sin6_port is always zero bug on iOS 9.3.2 and Mac OS X
571 void Curl_addrinfo_set_port(Curl_addrinfo *addrinfo, int port)
574 struct sockaddr_in *addr;
576 struct sockaddr_in6 *addr6;
578 for(ca = addrinfo; ca != NULL; ca = ca->ai_next) {
579 switch (ca->ai_family) {
581 addr = (void *)ca->ai_addr; /* storage area for this info */
582 addr->sin_port = htons((unsigned short)port);
587 addr6 = (void *)ca->ai_addr; /* storage area for this info */
588 addr6->sin6_port = htons((unsigned short)port);