1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2018, 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>
30 #ifdef HAVE_NETINET_IN6_H
31 # include <netinet/in6.h>
36 #ifdef HAVE_ARPA_INET_H
37 # include <arpa/inet.h>
48 #if defined(NETWARE) && defined(__NOVELL_LIBC__)
50 # define in_addr_t unsigned long
53 #if defined(WIN32) && defined(USE_UNIX_SOCKETS)
59 #include "curl_addrinfo.h"
60 #include "inet_pton.h"
62 /* The last 3 #include files should be in this order */
63 #include "curl_printf.h"
64 #include "curl_memory.h"
70 * This is used to free a linked list of Curl_addrinfo structs along
71 * with all its associated allocated storage. This function should be
72 * called once for each successful call to Curl_getaddrinfo_ex() or to
73 * any function call which actually allocates a Curl_addrinfo struct.
76 #if defined(__INTEL_COMPILER) && (__INTEL_COMPILER == 910) && \
77 defined(__OPTIMIZE__) && defined(__unix__) && defined(__i386__)
78 /* workaround icc 9.1 optimizer issue */
79 # define vqualifier volatile
85 Curl_freeaddrinfo(Curl_addrinfo *cahead)
87 Curl_addrinfo *vqualifier canext;
90 for(ca = cahead; ca != NULL; ca = canext) {
92 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 ca = malloc(sizeof(Curl_addrinfo));
164 /* copy each structure member individually, member ordering, */
165 /* size, or padding might be different for each platform. */
167 ca->ai_flags = ai->ai_flags;
168 ca->ai_family = ai->ai_family;
169 ca->ai_socktype = ai->ai_socktype;
170 ca->ai_protocol = ai->ai_protocol;
171 ca->ai_addrlen = (curl_socklen_t)ss_size;
173 ca->ai_canonname = NULL;
176 ca->ai_addr = malloc(ss_size);
182 memcpy(ca->ai_addr, ai->ai_addr, ss_size);
184 if(ai->ai_canonname != NULL) {
185 ca->ai_canonname = strdup(ai->ai_canonname);
186 if(!ca->ai_canonname) {
194 /* if the return list is empty, this becomes the first element */
198 /* add this element last in the return list */
200 calast->ai_next = ca;
205 /* destroy the addrinfo list */
207 freeaddrinfo(aihead);
209 /* if we failed, also destroy the Curl_addrinfo list */
211 Curl_freeaddrinfo(cafirst);
216 /* rfc3493 conformant */
219 /* rfc3493 obsoleted */
223 SET_SOCKERRNO(error);
229 /* This is not a CURLcode */
232 #endif /* HAVE_GETADDRINFO */
238 * This function returns a pointer to the first element of a newly allocated
239 * Curl_addrinfo struct linked list filled with the data of a given hostent.
240 * Curl_addrinfo is meant to work like the addrinfo struct does for a IPv6
241 * stack, but usable also for IPv4, all hosts and environments.
243 * The memory allocated by this function *MUST* be free'd later on calling
244 * Curl_freeaddrinfo(). For each successful call to this function there
245 * must be an associated call later to Curl_freeaddrinfo().
247 * Curl_addrinfo defined in "lib/curl_addrinfo.h"
249 * struct Curl_addrinfo {
254 * curl_socklen_t ai_addrlen; * Follow rfc3493 struct addrinfo *
255 * char *ai_canonname;
256 * struct sockaddr *ai_addr;
257 * struct Curl_addrinfo *ai_next;
259 * typedef struct Curl_addrinfo Curl_addrinfo;
261 * hostent defined in <netdb.h>
268 * char **h_addr_list;
271 * for backward compatibility:
273 * #define h_addr h_addr_list[0]
277 Curl_he2ai(const struct hostent *he, int port)
280 Curl_addrinfo *prevai = NULL;
281 Curl_addrinfo *firstai = NULL;
282 struct sockaddr_in *addr;
284 struct sockaddr_in6 *addr6;
286 CURLcode result = CURLE_OK;
291 /* no input == no output! */
294 DEBUGASSERT((he->h_name != NULL) && (he->h_addr_list != NULL));
296 for(i = 0; (curr = he->h_addr_list[i]) != NULL; i++) {
300 if(he->h_addrtype == AF_INET6)
301 ss_size = sizeof(struct sockaddr_in6);
304 ss_size = sizeof(struct sockaddr_in);
306 ai = calloc(1, sizeof(Curl_addrinfo));
308 result = CURLE_OUT_OF_MEMORY;
311 ai->ai_canonname = strdup(he->h_name);
312 if(!ai->ai_canonname) {
313 result = CURLE_OUT_OF_MEMORY;
317 ai->ai_addr = calloc(1, ss_size);
319 result = CURLE_OUT_OF_MEMORY;
320 free(ai->ai_canonname);
326 /* store the pointer we want to return from this function */
330 /* make the previous entry point to this */
331 prevai->ai_next = ai;
333 ai->ai_family = he->h_addrtype;
335 /* we return all names as STREAM, so when using this address for TFTP
336 the type must be ignored and conn->socktype be used instead! */
337 ai->ai_socktype = SOCK_STREAM;
339 ai->ai_addrlen = (curl_socklen_t)ss_size;
341 /* leave the rest of the struct filled with zero */
343 switch(ai->ai_family) {
345 addr = (void *)ai->ai_addr; /* storage area for this info */
347 memcpy(&addr->sin_addr, curr, sizeof(struct in_addr));
348 addr->sin_family = (unsigned short)(he->h_addrtype);
349 addr->sin_port = htons((unsigned short)port);
354 addr6 = (void *)ai->ai_addr; /* storage area for this info */
356 memcpy(&addr6->sin6_addr, curr, sizeof(struct in6_addr));
357 addr6->sin6_family = (unsigned short)(he->h_addrtype);
358 addr6->sin6_port = htons((unsigned short)port);
367 Curl_freeaddrinfo(firstai);
376 struct hostent hostentry;
380 struct in6_addr ina6;
383 char *h_addr_list[2];
390 * This function takes an internet address, in binary form, as input parameter
391 * along with its address family and the string version of the address, and it
392 * returns a Curl_addrinfo chain filled in correctly with information for the
397 Curl_ip2addr(int af, const void *inaddr, const char *hostname, int port)
401 #if defined(__VMS) && \
402 defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
403 #pragma pointer_size save
404 #pragma pointer_size short
405 #pragma message disable PTRMISMATCH
409 struct namebuff *buf;
414 DEBUGASSERT(inaddr && hostname);
416 buf = malloc(sizeof(struct namebuff));
420 hoststr = strdup(hostname);
428 addrsize = sizeof(struct in_addr);
429 addrentry = (void *)&buf->addrentry.ina4;
430 memcpy(addrentry, inaddr, sizeof(struct in_addr));
434 addrsize = sizeof(struct in6_addr);
435 addrentry = (void *)&buf->addrentry.ina6;
436 memcpy(addrentry, inaddr, sizeof(struct in6_addr));
448 h->h_addrtype = (short)af;
449 h->h_length = (short)addrsize;
450 h->h_addr_list = &buf->h_addr_list[0];
451 h->h_addr_list[0] = addrentry;
452 h->h_addr_list[1] = NULL; /* terminate list of entries */
454 #if defined(__VMS) && \
455 defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
456 #pragma pointer_size restore
457 #pragma message enable PTRMISMATCH
460 ai = Curl_he2ai(h, port);
469 * Given an IPv4 or IPv6 dotted string address, this converts it to a proper
470 * allocated Curl_addrinfo struct and returns it.
472 Curl_addrinfo *Curl_str2addr(char *address, int port)
475 if(Curl_inet_pton(AF_INET, address, &in) > 0)
476 /* This is a dotted IP address 123.123.123.123-style */
477 return Curl_ip2addr(AF_INET, &in, address, port);
481 if(Curl_inet_pton(AF_INET6, address, &in6) > 0)
482 /* This is a dotted IPv6 address ::1-style */
483 return Curl_ip2addr(AF_INET6, &in6, address, port);
486 return NULL; /* bad input format */
489 #ifdef USE_UNIX_SOCKETS
491 * Given a path to a Unix domain socket, return a newly allocated Curl_addrinfo
492 * struct initialized with this path.
493 * Set '*longpath' to TRUE if the error is a too long path.
495 Curl_addrinfo *Curl_unix2addr(const char *path, bool *longpath, bool abstract)
498 struct sockaddr_un *sa_un;
503 ai = calloc(1, sizeof(Curl_addrinfo));
506 ai->ai_addr = calloc(1, sizeof(struct sockaddr_un));
512 sa_un = (void *) ai->ai_addr;
513 sa_un->sun_family = AF_UNIX;
515 /* sun_path must be able to store the NUL-terminated path */
516 path_len = strlen(path) + 1;
517 if(path_len > sizeof(sa_un->sun_path)) {
524 ai->ai_family = AF_UNIX;
525 ai->ai_socktype = SOCK_STREAM; /* assume reliable transport for HTTP */
526 ai->ai_addrlen = (curl_socklen_t)
527 ((offsetof(struct sockaddr_un, sun_path) + path_len) & 0x7FFFFFFF);
529 /* Abstract Unix domain socket have NULL prefix instead of suffix */
531 memcpy(sa_un->sun_path + 1, path, path_len - 1);
533 memcpy(sa_un->sun_path, path, path_len); /* copy NUL byte */
539 #if defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO)
541 * curl_dofreeaddrinfo()
543 * This is strictly for memory tracing and are using the same style as the
544 * family otherwise present in memdebug.c. I put these ones here since they
545 * require a bunch of structs I didn't want to include in memdebug.c
549 curl_dofreeaddrinfo(struct addrinfo *freethis,
550 int line, const char *source)
553 lwip_freeaddrinfo(freethis);
555 (freeaddrinfo)(freethis);
557 curl_memlog("ADDR %s:%d freeaddrinfo(%p)\n",
558 source, line, (void *)freethis);
560 #endif /* defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO) */
563 #if defined(CURLDEBUG) && defined(HAVE_GETADDRINFO)
565 * curl_dogetaddrinfo()
567 * This is strictly for memory tracing and are using the same style as the
568 * family otherwise present in memdebug.c. I put these ones here since they
569 * require a bunch of structs I didn't want to include in memdebug.c
573 curl_dogetaddrinfo(const char *hostname,
575 const struct addrinfo *hints,
576 struct addrinfo **result,
577 int line, const char *source)
580 int res = lwip_getaddrinfo(hostname, service, hints, result);
582 int res = (getaddrinfo)(hostname, service, hints, result);
586 curl_memlog("ADDR %s:%d getaddrinfo() = %p\n",
587 source, line, (void *)*result);
589 curl_memlog("ADDR %s:%d getaddrinfo() failed\n",
593 #endif /* defined(CURLDEBUG) && defined(HAVE_GETADDRINFO) */
595 #if defined(HAVE_GETADDRINFO) && defined(USE_RESOLVE_ON_IPS)
597 * Work-arounds the sin6_port is always zero bug on iOS 9.3.2 and Mac OS X
600 void Curl_addrinfo_set_port(Curl_addrinfo *addrinfo, int port)
603 struct sockaddr_in *addr;
605 struct sockaddr_in6 *addr6;
607 for(ca = addrinfo; ca != NULL; ca = ca->ai_next) {
608 switch(ca->ai_family) {
610 addr = (void *)ca->ai_addr; /* storage area for this info */
611 addr->sin_port = htons((unsigned short)port);
616 addr6 = (void *)ca->ai_addr; /* storage area for this info */
617 addr6->sin6_port = htons((unsigned short)port);