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comparison mupdf-source/thirdparty/curl/lib/curl_addrinfo.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
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.
13 *
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.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22
23 #include "curl_setup.h"
24
25 #include <curl/curl.h>
26
27 #ifdef HAVE_NETINET_IN_H
28 # include <netinet/in.h>
29 #endif
30 #ifdef HAVE_NETINET_IN6_H
31 # include <netinet/in6.h>
32 #endif
33 #ifdef HAVE_NETDB_H
34 # include <netdb.h>
35 #endif
36 #ifdef HAVE_ARPA_INET_H
37 # include <arpa/inet.h>
38 #endif
39 #ifdef HAVE_SYS_UN_H
40 # include <sys/un.h>
41 #endif
42
43 #ifdef __VMS
44 # include <in.h>
45 # include <inet.h>
46 #endif
47
48 #if defined(NETWARE) && defined(__NOVELL_LIBC__)
49 # undef in_addr_t
50 # define in_addr_t unsigned long
51 #endif
52
53 #if defined(WIN32) && defined(USE_UNIX_SOCKETS)
54 #include <afunix.h>
55 #endif
56
57 #include <stddef.h>
58
59 #include "curl_addrinfo.h"
60 #include "inet_pton.h"
61 #include "warnless.h"
62 /* The last 3 #include files should be in this order */
63 #include "curl_printf.h"
64 #include "curl_memory.h"
65 #include "memdebug.h"
66
67 /*
68 * Curl_freeaddrinfo()
69 *
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.
74 */
75
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
80 #else
81 # define vqualifier
82 #endif
83
84 void
85 Curl_freeaddrinfo(Curl_addrinfo *cahead)
86 {
87 Curl_addrinfo *vqualifier canext;
88 Curl_addrinfo *ca;
89
90 for(ca = cahead; ca != NULL; ca = canext) {
91 free(ca->ai_addr);
92 free(ca->ai_canonname);
93 canext = ca->ai_next;
94
95 free(ca);
96 }
97 }
98
99
100 #ifdef HAVE_GETADDRINFO
101 /*
102 * Curl_getaddrinfo_ex()
103 *
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().
110 *
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.
113 */
114
115 int
116 Curl_getaddrinfo_ex(const char *nodename,
117 const char *servname,
118 const struct addrinfo *hints,
119 Curl_addrinfo **result)
120 {
121 const struct addrinfo *ai;
122 struct addrinfo *aihead;
123 Curl_addrinfo *cafirst = NULL;
124 Curl_addrinfo *calast = NULL;
125 Curl_addrinfo *ca;
126 size_t ss_size;
127 int error;
128
129 *result = NULL; /* assume failure */
130
131 error = getaddrinfo(nodename, servname, hints, &aihead);
132 if(error)
133 return error;
134
135 /* traverse the addrinfo list */
136
137 for(ai = aihead; ai != NULL; ai = ai->ai_next) {
138
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);
143 #ifdef ENABLE_IPV6
144 else if(ai->ai_family == AF_INET6)
145 ss_size = sizeof(struct sockaddr_in6);
146 #endif
147 else
148 continue;
149
150 /* ignore elements without required address info */
151 if((ai->ai_addr == NULL) || !(ai->ai_addrlen > 0))
152 continue;
153
154 /* ignore elements with bogus address size */
155 if((size_t)ai->ai_addrlen < ss_size)
156 continue;
157
158 ca = malloc(sizeof(Curl_addrinfo));
159 if(!ca) {
160 error = EAI_MEMORY;
161 break;
162 }
163
164 /* copy each structure member individually, member ordering, */
165 /* size, or padding might be different for each platform. */
166
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;
172 ca->ai_addr = NULL;
173 ca->ai_canonname = NULL;
174 ca->ai_next = NULL;
175
176 ca->ai_addr = malloc(ss_size);
177 if(!ca->ai_addr) {
178 error = EAI_MEMORY;
179 free(ca);
180 break;
181 }
182 memcpy(ca->ai_addr, ai->ai_addr, ss_size);
183
184 if(ai->ai_canonname != NULL) {
185 ca->ai_canonname = strdup(ai->ai_canonname);
186 if(!ca->ai_canonname) {
187 error = EAI_MEMORY;
188 free(ca->ai_addr);
189 free(ca);
190 break;
191 }
192 }
193
194 /* if the return list is empty, this becomes the first element */
195 if(!cafirst)
196 cafirst = ca;
197
198 /* add this element last in the return list */
199 if(calast)
200 calast->ai_next = ca;
201 calast = ca;
202
203 }
204
205 /* destroy the addrinfo list */
206 if(aihead)
207 freeaddrinfo(aihead);
208
209 /* if we failed, also destroy the Curl_addrinfo list */
210 if(error) {
211 Curl_freeaddrinfo(cafirst);
212 cafirst = NULL;
213 }
214 else if(!cafirst) {
215 #ifdef EAI_NONAME
216 /* rfc3493 conformant */
217 error = EAI_NONAME;
218 #else
219 /* rfc3493 obsoleted */
220 error = EAI_NODATA;
221 #endif
222 #ifdef USE_WINSOCK
223 SET_SOCKERRNO(error);
224 #endif
225 }
226
227 *result = cafirst;
228
229 /* This is not a CURLcode */
230 return error;
231 }
232 #endif /* HAVE_GETADDRINFO */
233
234
235 /*
236 * Curl_he2ai()
237 *
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.
242 *
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().
246 *
247 * Curl_addrinfo defined in "lib/curl_addrinfo.h"
248 *
249 * struct Curl_addrinfo {
250 * int ai_flags;
251 * int ai_family;
252 * int ai_socktype;
253 * int ai_protocol;
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;
258 * };
259 * typedef struct Curl_addrinfo Curl_addrinfo;
260 *
261 * hostent defined in <netdb.h>
262 *
263 * struct hostent {
264 * char *h_name;
265 * char **h_aliases;
266 * int h_addrtype;
267 * int h_length;
268 * char **h_addr_list;
269 * };
270 *
271 * for backward compatibility:
272 *
273 * #define h_addr h_addr_list[0]
274 */
275
276 Curl_addrinfo *
277 Curl_he2ai(const struct hostent *he, int port)
278 {
279 Curl_addrinfo *ai;
280 Curl_addrinfo *prevai = NULL;
281 Curl_addrinfo *firstai = NULL;
282 struct sockaddr_in *addr;
283 #ifdef ENABLE_IPV6
284 struct sockaddr_in6 *addr6;
285 #endif
286 CURLcode result = CURLE_OK;
287 int i;
288 char *curr;
289
290 if(!he)
291 /* no input == no output! */
292 return NULL;
293
294 DEBUGASSERT((he->h_name != NULL) && (he->h_addr_list != NULL));
295
296 for(i = 0; (curr = he->h_addr_list[i]) != NULL; i++) {
297
298 size_t ss_size;
299 #ifdef ENABLE_IPV6
300 if(he->h_addrtype == AF_INET6)
301 ss_size = sizeof(struct sockaddr_in6);
302 else
303 #endif
304 ss_size = sizeof(struct sockaddr_in);
305
306 ai = calloc(1, sizeof(Curl_addrinfo));
307 if(!ai) {
308 result = CURLE_OUT_OF_MEMORY;
309 break;
310 }
311 ai->ai_canonname = strdup(he->h_name);
312 if(!ai->ai_canonname) {
313 result = CURLE_OUT_OF_MEMORY;
314 free(ai);
315 break;
316 }
317 ai->ai_addr = calloc(1, ss_size);
318 if(!ai->ai_addr) {
319 result = CURLE_OUT_OF_MEMORY;
320 free(ai->ai_canonname);
321 free(ai);
322 break;
323 }
324
325 if(!firstai)
326 /* store the pointer we want to return from this function */
327 firstai = ai;
328
329 if(prevai)
330 /* make the previous entry point to this */
331 prevai->ai_next = ai;
332
333 ai->ai_family = he->h_addrtype;
334
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;
338
339 ai->ai_addrlen = (curl_socklen_t)ss_size;
340
341 /* leave the rest of the struct filled with zero */
342
343 switch(ai->ai_family) {
344 case AF_INET:
345 addr = (void *)ai->ai_addr; /* storage area for this info */
346
347 memcpy(&addr->sin_addr, curr, sizeof(struct in_addr));
348 addr->sin_family = (CURL_SA_FAMILY_T)(he->h_addrtype);
349 addr->sin_port = htons((unsigned short)port);
350 break;
351
352 #ifdef ENABLE_IPV6
353 case AF_INET6:
354 addr6 = (void *)ai->ai_addr; /* storage area for this info */
355
356 memcpy(&addr6->sin6_addr, curr, sizeof(struct in6_addr));
357 addr6->sin6_family = (CURL_SA_FAMILY_T)(he->h_addrtype);
358 addr6->sin6_port = htons((unsigned short)port);
359 break;
360 #endif
361 }
362
363 prevai = ai;
364 }
365
366 if(result) {
367 Curl_freeaddrinfo(firstai);
368 firstai = NULL;
369 }
370
371 return firstai;
372 }
373
374
375 struct namebuff {
376 struct hostent hostentry;
377 union {
378 struct in_addr ina4;
379 #ifdef ENABLE_IPV6
380 struct in6_addr ina6;
381 #endif
382 } addrentry;
383 char *h_addr_list[2];
384 };
385
386
387 /*
388 * Curl_ip2addr()
389 *
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
393 * given address/host
394 */
395
396 Curl_addrinfo *
397 Curl_ip2addr(int af, const void *inaddr, const char *hostname, int port)
398 {
399 Curl_addrinfo *ai;
400
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
406 #endif
407
408 struct hostent *h;
409 struct namebuff *buf;
410 char *addrentry;
411 char *hoststr;
412 size_t addrsize;
413
414 DEBUGASSERT(inaddr && hostname);
415
416 buf = malloc(sizeof(struct namebuff));
417 if(!buf)
418 return NULL;
419
420 hoststr = strdup(hostname);
421 if(!hoststr) {
422 free(buf);
423 return NULL;
424 }
425
426 switch(af) {
427 case AF_INET:
428 addrsize = sizeof(struct in_addr);
429 addrentry = (void *)&buf->addrentry.ina4;
430 memcpy(addrentry, inaddr, sizeof(struct in_addr));
431 break;
432 #ifdef ENABLE_IPV6
433 case AF_INET6:
434 addrsize = sizeof(struct in6_addr);
435 addrentry = (void *)&buf->addrentry.ina6;
436 memcpy(addrentry, inaddr, sizeof(struct in6_addr));
437 break;
438 #endif
439 default:
440 free(hoststr);
441 free(buf);
442 return NULL;
443 }
444
445 h = &buf->hostentry;
446 h->h_name = hoststr;
447 h->h_aliases = NULL;
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 */
453
454 #if defined(__VMS) && \
455 defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
456 #pragma pointer_size restore
457 #pragma message enable PTRMISMATCH
458 #endif
459
460 ai = Curl_he2ai(h, port);
461
462 free(hoststr);
463 free(buf);
464
465 return ai;
466 }
467
468 /*
469 * Given an IPv4 or IPv6 dotted string address, this converts it to a proper
470 * allocated Curl_addrinfo struct and returns it.
471 */
472 Curl_addrinfo *Curl_str2addr(char *address, int port)
473 {
474 struct in_addr in;
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);
478 #ifdef ENABLE_IPV6
479 {
480 struct in6_addr in6;
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);
484 }
485 #endif
486 return NULL; /* bad input format */
487 }
488
489 #ifdef USE_UNIX_SOCKETS
490 /**
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.
494 */
495 Curl_addrinfo *Curl_unix2addr(const char *path, bool *longpath, bool abstract)
496 {
497 Curl_addrinfo *ai;
498 struct sockaddr_un *sa_un;
499 size_t path_len;
500
501 *longpath = FALSE;
502
503 ai = calloc(1, sizeof(Curl_addrinfo));
504 if(!ai)
505 return NULL;
506 ai->ai_addr = calloc(1, sizeof(struct sockaddr_un));
507 if(!ai->ai_addr) {
508 free(ai);
509 return NULL;
510 }
511
512 sa_un = (void *) ai->ai_addr;
513 sa_un->sun_family = AF_UNIX;
514
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)) {
518 free(ai->ai_addr);
519 free(ai);
520 *longpath = TRUE;
521 return NULL;
522 }
523
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);
528
529 /* Abstract Unix domain socket have NULL prefix instead of suffix */
530 if(abstract)
531 memcpy(sa_un->sun_path + 1, path, path_len - 1);
532 else
533 memcpy(sa_un->sun_path, path, path_len); /* copy NUL byte */
534
535 return ai;
536 }
537 #endif
538
539 #if defined(CURLDEBUG) && defined(HAVE_GETADDRINFO) && \
540 defined(HAVE_FREEADDRINFO)
541 /*
542 * curl_dbg_freeaddrinfo()
543 *
544 * This is strictly for memory tracing and are using the same style as the
545 * family otherwise present in memdebug.c. I put these ones here since they
546 * require a bunch of structs I didn't want to include in memdebug.c
547 */
548
549 void
550 curl_dbg_freeaddrinfo(struct addrinfo *freethis,
551 int line, const char *source)
552 {
553 curl_dbg_log("ADDR %s:%d freeaddrinfo(%p)\n",
554 source, line, (void *)freethis);
555 #ifdef USE_LWIPSOCK
556 lwip_freeaddrinfo(freethis);
557 #else
558 (freeaddrinfo)(freethis);
559 #endif
560 }
561 #endif /* defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO) */
562
563
564 #if defined(CURLDEBUG) && defined(HAVE_GETADDRINFO)
565 /*
566 * curl_dbg_getaddrinfo()
567 *
568 * This is strictly for memory tracing and are using the same style as the
569 * family otherwise present in memdebug.c. I put these ones here since they
570 * require a bunch of structs I didn't want to include in memdebug.c
571 */
572
573 int
574 curl_dbg_getaddrinfo(const char *hostname,
575 const char *service,
576 const struct addrinfo *hints,
577 struct addrinfo **result,
578 int line, const char *source)
579 {
580 #ifdef USE_LWIPSOCK
581 int res = lwip_getaddrinfo(hostname, service, hints, result);
582 #else
583 int res = (getaddrinfo)(hostname, service, hints, result);
584 #endif
585 if(0 == res)
586 /* success */
587 curl_dbg_log("ADDR %s:%d getaddrinfo() = %p\n",
588 source, line, (void *)*result);
589 else
590 curl_dbg_log("ADDR %s:%d getaddrinfo() failed\n",
591 source, line);
592 return res;
593 }
594 #endif /* defined(CURLDEBUG) && defined(HAVE_GETADDRINFO) */
595
596 #if defined(HAVE_GETADDRINFO) && defined(USE_RESOLVE_ON_IPS)
597 /*
598 * Work-arounds the sin6_port is always zero bug on iOS 9.3.2 and Mac OS X
599 * 10.11.5.
600 */
601 void Curl_addrinfo_set_port(Curl_addrinfo *addrinfo, int port)
602 {
603 Curl_addrinfo *ca;
604 struct sockaddr_in *addr;
605 #ifdef ENABLE_IPV6
606 struct sockaddr_in6 *addr6;
607 #endif
608 for(ca = addrinfo; ca != NULL; ca = ca->ai_next) {
609 switch(ca->ai_family) {
610 case AF_INET:
611 addr = (void *)ca->ai_addr; /* storage area for this info */
612 addr->sin_port = htons((unsigned short)port);
613 break;
614
615 #ifdef ENABLE_IPV6
616 case AF_INET6:
617 addr6 = (void *)ca->ai_addr; /* storage area for this info */
618 addr6->sin6_port = htons((unsigned short)port);
619 break;
620 #endif
621 }
622 }
623 }
624 #endif