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Commit | Line | Data |
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b1322259 | 1 | /* |
eec0ad10 | 2 | * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved. |
28a0841b | 3 | * |
09abbca1 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
b1322259 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
28a0841b RL |
8 | */ |
9 | ||
99501e81 | 10 | #ifndef _GNU_SOURCE |
11 | # define _GNU_SOURCE | |
12 | #endif | |
13 | ||
86f31dd9 | 14 | #include <assert.h> |
28a0841b RL |
15 | #include <string.h> |
16 | ||
706457b7 | 17 | #include "bio_local.h" |
5c4328f0 | 18 | #include <openssl/crypto.h> |
28a0841b | 19 | |
1288f26f | 20 | #ifndef OPENSSL_NO_SOCK |
28a0841b RL |
21 | #include <openssl/err.h> |
22 | #include <openssl/buffer.h> | |
176db6dc | 23 | #include "internal/thread_once.h" |
28a0841b | 24 | |
ff234405 | 25 | CRYPTO_RWLOCK *bio_lookup_lock; |
f989cd8c AG |
26 | static CRYPTO_ONCE bio_lookup_init = CRYPTO_ONCE_STATIC_INIT; |
27 | ||
28a0841b | 28 | /* |
706457b7 | 29 | * Throughout this file and bio_local.h, the existence of the macro |
28a0841b RL |
30 | * AI_PASSIVE is used to detect the availability of struct addrinfo, |
31 | * getnameinfo() and getaddrinfo(). If that macro doesn't exist, | |
32 | * we use our own implementation instead, using gethostbyname, | |
33 | * getservbyname and a few other. | |
34 | */ | |
35 | ||
36 | /********************************************************************** | |
37 | * | |
38 | * Address structure | |
39 | * | |
40 | */ | |
41 | ||
42 | BIO_ADDR *BIO_ADDR_new(void) | |
43 | { | |
43ecb9c3 RS |
44 | BIO_ADDR *ret = OPENSSL_zalloc(sizeof(*ret)); |
45 | ||
cb1d435c MRA |
46 | if (ret == NULL) { |
47 | BIOerr(BIO_F_BIO_ADDR_NEW, ERR_R_MALLOC_FAILURE); | |
138388fe | 48 | return NULL; |
cb1d435c | 49 | } |
138388fe | 50 | |
7d1d48a2 | 51 | ret->sa.sa_family = AF_UNSPEC; |
28a0841b RL |
52 | return ret; |
53 | } | |
54 | ||
55 | void BIO_ADDR_free(BIO_ADDR *ap) | |
56 | { | |
57 | OPENSSL_free(ap); | |
58 | } | |
59 | ||
7d1d48a2 MC |
60 | void BIO_ADDR_clear(BIO_ADDR *ap) |
61 | { | |
62 | memset(ap, 0, sizeof(*ap)); | |
63 | ap->sa.sa_family = AF_UNSPEC; | |
64 | } | |
65 | ||
28a0841b RL |
66 | /* |
67 | * BIO_ADDR_make - non-public routine to fill a BIO_ADDR with the contents | |
68 | * of a struct sockaddr. | |
69 | */ | |
70 | int BIO_ADDR_make(BIO_ADDR *ap, const struct sockaddr *sa) | |
71 | { | |
72 | if (sa->sa_family == AF_INET) { | |
55bd917b | 73 | memcpy(&(ap->s_in), sa, sizeof(struct sockaddr_in)); |
28a0841b RL |
74 | return 1; |
75 | } | |
76 | #ifdef AF_INET6 | |
77 | if (sa->sa_family == AF_INET6) { | |
55bd917b | 78 | memcpy(&(ap->s_in6), sa, sizeof(struct sockaddr_in6)); |
28a0841b RL |
79 | return 1; |
80 | } | |
81 | #endif | |
82 | #ifdef AF_UNIX | |
17750375 | 83 | if (sa->sa_family == AF_UNIX) { |
55bd917b | 84 | memcpy(&(ap->s_un), sa, sizeof(struct sockaddr_un)); |
28a0841b RL |
85 | return 1; |
86 | } | |
87 | #endif | |
88 | ||
89 | return 0; | |
90 | } | |
91 | ||
92 | int BIO_ADDR_rawmake(BIO_ADDR *ap, int family, | |
93 | const void *where, size_t wherelen, | |
94 | unsigned short port) | |
95 | { | |
96 | #ifdef AF_UNIX | |
97 | if (family == AF_UNIX) { | |
29620124 | 98 | if (wherelen + 1 > sizeof(ap->s_un.sun_path)) |
28a0841b | 99 | return 0; |
29620124 RL |
100 | memset(&ap->s_un, 0, sizeof(ap->s_un)); |
101 | ap->s_un.sun_family = family; | |
102 | strncpy(ap->s_un.sun_path, where, sizeof(ap->s_un.sun_path) - 1); | |
28a0841b RL |
103 | return 1; |
104 | } | |
105 | #endif | |
106 | if (family == AF_INET) { | |
107 | if (wherelen != sizeof(struct in_addr)) | |
108 | return 0; | |
29620124 RL |
109 | memset(&ap->s_in, 0, sizeof(ap->s_in)); |
110 | ap->s_in.sin_family = family; | |
111 | ap->s_in.sin_port = port; | |
112 | ap->s_in.sin_addr = *(struct in_addr *)where; | |
28a0841b RL |
113 | return 1; |
114 | } | |
115 | #ifdef AF_INET6 | |
116 | if (family == AF_INET6) { | |
117 | if (wherelen != sizeof(struct in6_addr)) | |
118 | return 0; | |
29620124 RL |
119 | memset(&ap->s_in6, 0, sizeof(ap->s_in6)); |
120 | ap->s_in6.sin6_family = family; | |
121 | ap->s_in6.sin6_port = port; | |
122 | ap->s_in6.sin6_addr = *(struct in6_addr *)where; | |
28a0841b RL |
123 | return 1; |
124 | } | |
125 | #endif | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | int BIO_ADDR_family(const BIO_ADDR *ap) | |
131 | { | |
132 | return ap->sa.sa_family; | |
133 | } | |
134 | ||
135 | int BIO_ADDR_rawaddress(const BIO_ADDR *ap, void *p, size_t *l) | |
136 | { | |
137 | size_t len = 0; | |
138 | const void *addrptr = NULL; | |
139 | ||
140 | if (ap->sa.sa_family == AF_INET) { | |
29620124 RL |
141 | len = sizeof(ap->s_in.sin_addr); |
142 | addrptr = &ap->s_in.sin_addr; | |
28a0841b RL |
143 | } |
144 | #ifdef AF_INET6 | |
145 | else if (ap->sa.sa_family == AF_INET6) { | |
29620124 RL |
146 | len = sizeof(ap->s_in6.sin6_addr); |
147 | addrptr = &ap->s_in6.sin6_addr; | |
28a0841b RL |
148 | } |
149 | #endif | |
150 | #ifdef AF_UNIX | |
151 | else if (ap->sa.sa_family == AF_UNIX) { | |
29620124 RL |
152 | len = strlen(ap->s_un.sun_path); |
153 | addrptr = &ap->s_un.sun_path; | |
28a0841b RL |
154 | } |
155 | #endif | |
156 | ||
157 | if (addrptr == NULL) | |
158 | return 0; | |
159 | ||
160 | if (p != NULL) { | |
161 | memcpy(p, addrptr, len); | |
162 | } | |
163 | if (l != NULL) | |
164 | *l = len; | |
165 | ||
166 | return 1; | |
167 | } | |
168 | ||
169 | unsigned short BIO_ADDR_rawport(const BIO_ADDR *ap) | |
170 | { | |
171 | if (ap->sa.sa_family == AF_INET) | |
29620124 | 172 | return ap->s_in.sin_port; |
28a0841b RL |
173 | #ifdef AF_INET6 |
174 | if (ap->sa.sa_family == AF_INET6) | |
29620124 | 175 | return ap->s_in6.sin6_port; |
28a0841b RL |
176 | #endif |
177 | return 0; | |
178 | } | |
179 | ||
180 | /*- | |
181 | * addr_strings - helper function to get host and service names | |
182 | * @ap: the BIO_ADDR that has the input info | |
183 | * @numeric: 0 if actual names should be returned, 1 if the numeric | |
184 | * representation should be returned. | |
185 | * @hostname: a pointer to a pointer to a memory area to store the | |
186 | * host name or numeric representation. Unused if NULL. | |
187 | * @service: a pointer to a pointer to a memory area to store the | |
188 | * service name or numeric representation. Unused if NULL. | |
189 | * | |
190 | * The return value is 0 on failure, with the error code in the error | |
191 | * stack, and 1 on success. | |
192 | */ | |
193 | static int addr_strings(const BIO_ADDR *ap, int numeric, | |
194 | char **hostname, char **service) | |
195 | { | |
ed03c461 RL |
196 | if (BIO_sock_init() != 1) |
197 | return 0; | |
198 | ||
28a0841b RL |
199 | if (1) { |
200 | #ifdef AI_PASSIVE | |
201 | int ret = 0; | |
6faffd0a | 202 | char host[NI_MAXHOST] = "", serv[NI_MAXSERV] = ""; |
28a0841b RL |
203 | int flags = 0; |
204 | ||
205 | if (numeric) | |
206 | flags |= NI_NUMERICHOST | NI_NUMERICSERV; | |
207 | ||
208 | if ((ret = getnameinfo(BIO_ADDR_sockaddr(ap), | |
209 | BIO_ADDR_sockaddr_size(ap), | |
210 | host, sizeof(host), serv, sizeof(serv), | |
211 | flags)) != 0) { | |
212 | # ifdef EAI_SYSTEM | |
213 | if (ret == EAI_SYSTEM) { | |
ff988500 RS |
214 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), |
215 | "calling getnameinfo()"); | |
28a0841b RL |
216 | BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); |
217 | } else | |
218 | # endif | |
219 | { | |
220 | BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); | |
221 | ERR_add_error_data(1, gai_strerror(ret)); | |
222 | } | |
223 | return 0; | |
224 | } | |
d40cf9bc | 225 | |
6faffd0a RL |
226 | /* VMS getnameinfo() has a bug, it doesn't fill in serv, which |
227 | * leaves it with whatever garbage that happens to be there. | |
228 | * However, we initialise serv with the empty string (serv[0] | |
229 | * is therefore NUL), so it gets real easy to detect when things | |
230 | * didn't go the way one might expect. | |
d40cf9bc | 231 | */ |
6faffd0a | 232 | if (serv[0] == '\0') { |
d40cf9bc RL |
233 | BIO_snprintf(serv, sizeof(serv), "%d", |
234 | ntohs(BIO_ADDR_rawport(ap))); | |
235 | } | |
236 | ||
24854e01 | 237 | if (hostname != NULL) |
28a0841b | 238 | *hostname = OPENSSL_strdup(host); |
24854e01 | 239 | if (service != NULL) |
28a0841b RL |
240 | *service = OPENSSL_strdup(serv); |
241 | } else { | |
242 | #endif | |
24854e01 | 243 | if (hostname != NULL) |
29620124 | 244 | *hostname = OPENSSL_strdup(inet_ntoa(ap->s_in.sin_addr)); |
24854e01 | 245 | if (service != NULL) { |
28a0841b | 246 | char serv[6]; /* port is 16 bits => max 5 decimal digits */ |
29620124 | 247 | BIO_snprintf(serv, sizeof(serv), "%d", ntohs(ap->s_in.sin_port)); |
28a0841b RL |
248 | *service = OPENSSL_strdup(serv); |
249 | } | |
250 | } | |
251 | ||
24854e01 MC |
252 | if ((hostname != NULL && *hostname == NULL) |
253 | || (service != NULL && *service == NULL)) { | |
254 | if (hostname != NULL) { | |
255 | OPENSSL_free(*hostname); | |
256 | *hostname = NULL; | |
257 | } | |
258 | if (service != NULL) { | |
259 | OPENSSL_free(*service); | |
260 | *service = NULL; | |
261 | } | |
262 | BIOerr(BIO_F_ADDR_STRINGS, ERR_R_MALLOC_FAILURE); | |
263 | return 0; | |
264 | } | |
265 | ||
28a0841b RL |
266 | return 1; |
267 | } | |
268 | ||
269 | char *BIO_ADDR_hostname_string(const BIO_ADDR *ap, int numeric) | |
270 | { | |
271 | char *hostname = NULL; | |
272 | ||
273 | if (addr_strings(ap, numeric, &hostname, NULL)) | |
274 | return hostname; | |
275 | ||
276 | return NULL; | |
277 | } | |
278 | ||
279 | char *BIO_ADDR_service_string(const BIO_ADDR *ap, int numeric) | |
280 | { | |
281 | char *service = NULL; | |
282 | ||
283 | if (addr_strings(ap, numeric, NULL, &service)) | |
284 | return service; | |
285 | ||
286 | return NULL; | |
287 | } | |
288 | ||
289 | char *BIO_ADDR_path_string(const BIO_ADDR *ap) | |
290 | { | |
291 | #ifdef AF_UNIX | |
292 | if (ap->sa.sa_family == AF_UNIX) | |
29620124 | 293 | return OPENSSL_strdup(ap->s_un.sun_path); |
28a0841b RL |
294 | #endif |
295 | return NULL; | |
296 | } | |
297 | ||
298 | /* | |
299 | * BIO_ADDR_sockaddr - non-public routine to return the struct sockaddr | |
300 | * for a given BIO_ADDR. In reality, this is simply a type safe cast. | |
301 | * The returned struct sockaddr is const, so it can't be tampered with. | |
302 | */ | |
303 | const struct sockaddr *BIO_ADDR_sockaddr(const BIO_ADDR *ap) | |
304 | { | |
305 | return &(ap->sa); | |
306 | } | |
307 | ||
308 | /* | |
309 | * BIO_ADDR_sockaddr_noconst - non-public function that does the same | |
310 | * as BIO_ADDR_sockaddr, but returns a non-const. USE WITH CARE, as | |
311 | * it allows you to tamper with the data (and thereby the contents | |
312 | * of the input BIO_ADDR). | |
313 | */ | |
314 | struct sockaddr *BIO_ADDR_sockaddr_noconst(BIO_ADDR *ap) | |
315 | { | |
316 | return &(ap->sa); | |
317 | } | |
318 | ||
319 | /* | |
320 | * BIO_ADDR_sockaddr_size - non-public function that returns the size | |
321 | * of the struct sockaddr the BIO_ADDR is using. If the protocol family | |
322 | * isn't set or is something other than AF_INET, AF_INET6 or AF_UNIX, | |
323 | * the size of the BIO_ADDR type is returned. | |
324 | */ | |
325 | socklen_t BIO_ADDR_sockaddr_size(const BIO_ADDR *ap) | |
326 | { | |
327 | if (ap->sa.sa_family == AF_INET) | |
29620124 | 328 | return sizeof(ap->s_in); |
28a0841b RL |
329 | #ifdef AF_INET6 |
330 | if (ap->sa.sa_family == AF_INET6) | |
29620124 | 331 | return sizeof(ap->s_in6); |
28a0841b RL |
332 | #endif |
333 | #ifdef AF_UNIX | |
334 | if (ap->sa.sa_family == AF_UNIX) | |
29620124 | 335 | return sizeof(ap->s_un); |
28a0841b RL |
336 | #endif |
337 | return sizeof(*ap); | |
338 | } | |
339 | ||
340 | /********************************************************************** | |
341 | * | |
e5a82bfd | 342 | * Address info database |
28a0841b RL |
343 | * |
344 | */ | |
345 | ||
346 | const BIO_ADDRINFO *BIO_ADDRINFO_next(const BIO_ADDRINFO *bai) | |
347 | { | |
348 | if (bai != NULL) | |
349 | return bai->bai_next; | |
350 | return NULL; | |
351 | } | |
352 | ||
353 | int BIO_ADDRINFO_family(const BIO_ADDRINFO *bai) | |
354 | { | |
355 | if (bai != NULL) | |
356 | return bai->bai_family; | |
357 | return 0; | |
358 | } | |
359 | ||
360 | int BIO_ADDRINFO_socktype(const BIO_ADDRINFO *bai) | |
361 | { | |
362 | if (bai != NULL) | |
363 | return bai->bai_socktype; | |
364 | return 0; | |
365 | } | |
366 | ||
367 | int BIO_ADDRINFO_protocol(const BIO_ADDRINFO *bai) | |
368 | { | |
c72fb77f RL |
369 | if (bai != NULL) { |
370 | if (bai->bai_protocol != 0) | |
371 | return bai->bai_protocol; | |
372 | ||
373 | #ifdef AF_UNIX | |
374 | if (bai->bai_family == AF_UNIX) | |
375 | return 0; | |
376 | #endif | |
377 | ||
378 | switch (bai->bai_socktype) { | |
379 | case SOCK_STREAM: | |
380 | return IPPROTO_TCP; | |
381 | case SOCK_DGRAM: | |
382 | return IPPROTO_UDP; | |
383 | default: | |
384 | break; | |
385 | } | |
386 | } | |
28a0841b RL |
387 | return 0; |
388 | } | |
389 | ||
390 | /* | |
391 | * BIO_ADDRINFO_sockaddr_size - non-public function that returns the size | |
392 | * of the struct sockaddr inside the BIO_ADDRINFO. | |
393 | */ | |
394 | socklen_t BIO_ADDRINFO_sockaddr_size(const BIO_ADDRINFO *bai) | |
395 | { | |
396 | if (bai != NULL) | |
397 | return bai->bai_addrlen; | |
398 | return 0; | |
399 | } | |
400 | ||
401 | /* | |
402 | * BIO_ADDRINFO_sockaddr - non-public function that returns bai_addr | |
403 | * as the struct sockaddr it is. | |
404 | */ | |
405 | const struct sockaddr *BIO_ADDRINFO_sockaddr(const BIO_ADDRINFO *bai) | |
406 | { | |
407 | if (bai != NULL) | |
408 | return bai->bai_addr; | |
409 | return NULL; | |
410 | } | |
411 | ||
412 | const BIO_ADDR *BIO_ADDRINFO_address(const BIO_ADDRINFO *bai) | |
413 | { | |
414 | if (bai != NULL) | |
415 | return (BIO_ADDR *)bai->bai_addr; | |
416 | return NULL; | |
417 | } | |
418 | ||
419 | void BIO_ADDRINFO_free(BIO_ADDRINFO *bai) | |
420 | { | |
421 | if (bai == NULL) | |
422 | return; | |
423 | ||
424 | #ifdef AI_PASSIVE | |
425 | # ifdef AF_UNIX | |
426 | # define _cond bai->bai_family != AF_UNIX | |
427 | # else | |
428 | # define _cond 1 | |
429 | # endif | |
430 | if (_cond) { | |
431 | freeaddrinfo(bai); | |
432 | return; | |
433 | } | |
434 | #endif | |
435 | ||
436 | /* Free manually when we know that addrinfo_wrap() was used. | |
437 | * See further comment above addrinfo_wrap() | |
438 | */ | |
439 | while (bai != NULL) { | |
440 | BIO_ADDRINFO *next = bai->bai_next; | |
441 | OPENSSL_free(bai->bai_addr); | |
442 | OPENSSL_free(bai); | |
443 | bai = next; | |
444 | } | |
445 | } | |
446 | ||
447 | /********************************************************************** | |
448 | * | |
449 | * Service functions | |
450 | * | |
451 | */ | |
452 | ||
453 | /*- | |
454 | * The specs in hostserv can take these forms: | |
455 | * | |
456 | * host:service => *host = "host", *service = "service" | |
457 | * host:* => *host = "host", *service = NULL | |
458 | * host: => *host = "host", *service = NULL | |
459 | * :service => *host = NULL, *service = "service" | |
460 | * *:service => *host = NULL, *service = "service" | |
461 | * | |
462 | * in case no : is present in the string, the result depends on | |
463 | * hostserv_prio, as follows: | |
464 | * | |
465 | * when hostserv_prio == BIO_PARSE_PRIO_HOST | |
466 | * host => *host = "host", *service untouched | |
467 | * | |
468 | * when hostserv_prio == BIO_PARSE_PRIO_SERV | |
469 | * service => *host untouched, *service = "service" | |
470 | * | |
471 | */ | |
472 | int BIO_parse_hostserv(const char *hostserv, char **host, char **service, | |
473 | enum BIO_hostserv_priorities hostserv_prio) | |
474 | { | |
475 | const char *h = NULL; size_t hl = 0; | |
476 | const char *p = NULL; size_t pl = 0; | |
477 | ||
478 | if (*hostserv == '[') { | |
479 | if ((p = strchr(hostserv, ']')) == NULL) | |
480 | goto spec_err; | |
481 | h = hostserv + 1; | |
482 | hl = p - h; | |
483 | p++; | |
484 | if (*p == '\0') | |
485 | p = NULL; | |
486 | else if (*p != ':') | |
487 | goto spec_err; | |
488 | else { | |
489 | p++; | |
490 | pl = strlen(p); | |
491 | } | |
492 | } else { | |
493 | const char *p2 = strrchr(hostserv, ':'); | |
494 | p = strchr(hostserv, ':'); | |
495 | ||
496 | /*- | |
497 | * Check for more than one colon. There are three possible | |
498 | * interpretations: | |
499 | * 1. IPv6 address with port number, last colon being separator. | |
500 | * 2. IPv6 address only. | |
501 | * 3. IPv6 address only if hostserv_prio == BIO_PARSE_PRIO_HOST, | |
502 | * IPv6 address and port number if hostserv_prio == BIO_PARSE_PRIO_SERV | |
503 | * Because of this ambiguity, we currently choose to make it an | |
504 | * error. | |
505 | */ | |
506 | if (p != p2) | |
507 | goto amb_err; | |
508 | ||
509 | if (p != NULL) { | |
510 | h = hostserv; | |
511 | hl = p - h; | |
512 | p++; | |
513 | pl = strlen(p); | |
514 | } else if (hostserv_prio == BIO_PARSE_PRIO_HOST) { | |
515 | h = hostserv; | |
516 | hl = strlen(h); | |
517 | } else { | |
518 | p = hostserv; | |
519 | pl = strlen(p); | |
520 | } | |
521 | } | |
522 | ||
80926502 | 523 | if (p != NULL && strchr(p, ':')) |
28a0841b RL |
524 | goto spec_err; |
525 | ||
526 | if (h != NULL && host != NULL) { | |
527 | if (hl == 0 | |
528 | || (hl == 1 && h[0] == '*')) { | |
529 | *host = NULL; | |
530 | } else { | |
531 | *host = OPENSSL_strndup(h, hl); | |
532 | if (*host == NULL) | |
533 | goto memerr; | |
534 | } | |
535 | } | |
536 | if (p != NULL && service != NULL) { | |
537 | if (pl == 0 | |
538 | || (pl == 1 && p[0] == '*')) { | |
539 | *service = NULL; | |
540 | } else { | |
541 | *service = OPENSSL_strndup(p, pl); | |
542 | if (*service == NULL) | |
543 | goto memerr; | |
544 | } | |
545 | } | |
546 | ||
547 | return 1; | |
548 | amb_err: | |
549 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_AMBIGUOUS_HOST_OR_SERVICE); | |
550 | return 0; | |
551 | spec_err: | |
552 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_MALFORMED_HOST_OR_SERVICE); | |
553 | return 0; | |
554 | memerr: | |
555 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, ERR_R_MALLOC_FAILURE); | |
556 | return 0; | |
557 | } | |
558 | ||
559 | /* addrinfo_wrap is used to build our own addrinfo "chain". | |
560 | * (it has only one entry, so calling it a chain may be a stretch) | |
561 | * It should ONLY be called when getaddrinfo() and friends | |
562 | * aren't available, OR when dealing with a non IP protocol | |
563 | * family, such as AF_UNIX | |
564 | * | |
565 | * the return value is 1 on success, or 0 on failure, which | |
8483a003 | 566 | * only happens if a memory allocation error occurred. |
28a0841b RL |
567 | */ |
568 | static int addrinfo_wrap(int family, int socktype, | |
569 | const void *where, size_t wherelen, | |
570 | unsigned short port, | |
571 | BIO_ADDRINFO **bai) | |
572 | { | |
cdb10bae RS |
573 | if ((*bai = OPENSSL_zalloc(sizeof(**bai))) == NULL) { |
574 | BIOerr(BIO_F_ADDRINFO_WRAP, ERR_R_MALLOC_FAILURE); | |
28a0841b | 575 | return 0; |
cdb10bae | 576 | } |
43ecb9c3 | 577 | |
28a0841b RL |
578 | (*bai)->bai_family = family; |
579 | (*bai)->bai_socktype = socktype; | |
580 | if (socktype == SOCK_STREAM) | |
581 | (*bai)->bai_protocol = IPPROTO_TCP; | |
582 | if (socktype == SOCK_DGRAM) | |
583 | (*bai)->bai_protocol = IPPROTO_UDP; | |
584 | #ifdef AF_UNIX | |
585 | if (family == AF_UNIX) | |
586 | (*bai)->bai_protocol = 0; | |
587 | #endif | |
588 | { | |
589 | /* Magic: We know that BIO_ADDR_sockaddr_noconst is really | |
590 | just an advanced cast of BIO_ADDR* to struct sockaddr * | |
591 | by the power of union, so while it may seem that we're | |
592 | creating a memory leak here, we are not. It will be | |
593 | all right. */ | |
594 | BIO_ADDR *addr = BIO_ADDR_new(); | |
595 | if (addr != NULL) { | |
596 | BIO_ADDR_rawmake(addr, family, where, wherelen, port); | |
597 | (*bai)->bai_addr = BIO_ADDR_sockaddr_noconst(addr); | |
598 | } | |
599 | } | |
600 | (*bai)->bai_next = NULL; | |
601 | if ((*bai)->bai_addr == NULL) { | |
602 | BIO_ADDRINFO_free(*bai); | |
603 | *bai = NULL; | |
604 | return 0; | |
605 | } | |
606 | return 1; | |
607 | } | |
608 | ||
c2e4e5d2 | 609 | DEFINE_RUN_ONCE_STATIC(do_bio_lookup_init) |
f989cd8c | 610 | { |
eb2b9892 BE |
611 | if (!OPENSSL_init_crypto(0, NULL)) |
612 | return 0; | |
63ab5ea1 | 613 | bio_lookup_lock = CRYPTO_THREAD_lock_new(); |
5a7ad1f0 | 614 | return bio_lookup_lock != NULL; |
f989cd8c AG |
615 | } |
616 | ||
5114d822 MC |
617 | int BIO_lookup(const char *host, const char *service, |
618 | enum BIO_lookup_type lookup_type, | |
619 | int family, int socktype, BIO_ADDRINFO **res) | |
620 | { | |
621 | return BIO_lookup_ex(host, service, lookup_type, family, socktype, 0, res); | |
622 | } | |
623 | ||
28a0841b | 624 | /*- |
561f6f1e | 625 | * BIO_lookup_ex - look up the node and service you want to connect to. |
28a0841b RL |
626 | * @node: the node you want to connect to. |
627 | * @service: the service you want to connect to. | |
628 | * @lookup_type: declare intent with the result, client or server. | |
629 | * @family: the address family you want to use. Use AF_UNSPEC for any, or | |
630 | * AF_INET, AF_INET6 or AF_UNIX. | |
631 | * @socktype: The socket type you want to use. Can be SOCK_STREAM, SOCK_DGRAM | |
632 | * or 0 for all. | |
5114d822 MC |
633 | * @protocol: The protocol to use, e.g. IPPROTO_TCP or IPPROTO_UDP or 0 for all. |
634 | * Note that some platforms may not return IPPROTO_SCTP without | |
635 | * explicitly requesting it (i.e. IPPROTO_SCTP may not be returned | |
636 | * with 0 for the protocol) | |
28a0841b RL |
637 | * @res: Storage place for the resulting list of returned addresses |
638 | * | |
639 | * This will do a lookup of the node and service that you want to connect to. | |
640 | * It returns a linked list of different addresses you can try to connect to. | |
641 | * | |
642 | * When no longer needed you should call BIO_ADDRINFO_free() to free the result. | |
643 | * | |
644 | * The return value is 1 on success or 0 in case of error. | |
645 | */ | |
e8291428 | 646 | int BIO_lookup_ex(const char *host, const char *service, int lookup_type, |
5114d822 | 647 | int family, int socktype, int protocol, BIO_ADDRINFO **res) |
28a0841b RL |
648 | { |
649 | int ret = 0; /* Assume failure */ | |
650 | ||
651 | switch(family) { | |
652 | case AF_INET: | |
653 | #ifdef AF_INET6 | |
654 | case AF_INET6: | |
655 | #endif | |
656 | #ifdef AF_UNIX | |
657 | case AF_UNIX: | |
658 | #endif | |
659 | #ifdef AF_UNSPEC | |
660 | case AF_UNSPEC: | |
661 | #endif | |
662 | break; | |
663 | default: | |
5114d822 | 664 | BIOerr(BIO_F_BIO_LOOKUP_EX, BIO_R_UNSUPPORTED_PROTOCOL_FAMILY); |
28a0841b RL |
665 | return 0; |
666 | } | |
667 | ||
668 | #ifdef AF_UNIX | |
669 | if (family == AF_UNIX) { | |
670 | if (addrinfo_wrap(family, socktype, host, strlen(host), 0, res)) | |
671 | return 1; | |
672 | else | |
5114d822 | 673 | BIOerr(BIO_F_BIO_LOOKUP_EX, ERR_R_MALLOC_FAILURE); |
28a0841b RL |
674 | return 0; |
675 | } | |
676 | #endif | |
677 | ||
ed03c461 RL |
678 | if (BIO_sock_init() != 1) |
679 | return 0; | |
680 | ||
28a0841b RL |
681 | if (1) { |
682 | #ifdef AI_PASSIVE | |
91cb81d4 | 683 | int gai_ret = 0, old_ret = 0; |
28a0841b | 684 | struct addrinfo hints; |
3e49ee23 | 685 | |
cbe29648 | 686 | memset(&hints, 0, sizeof(hints)); |
28a0841b | 687 | |
28a0841b RL |
688 | hints.ai_family = family; |
689 | hints.ai_socktype = socktype; | |
5114d822 | 690 | hints.ai_protocol = protocol; |
91cb81d4 TM |
691 | # ifdef AI_ADDRCONFIG |
692 | # ifdef AF_UNSPEC | |
b8472b4e | 693 | if (family == AF_UNSPEC) |
91cb81d4 | 694 | # endif |
b8472b4e | 695 | hints.ai_flags |= AI_ADDRCONFIG; |
91cb81d4 | 696 | # endif |
28a0841b RL |
697 | |
698 | if (lookup_type == BIO_LOOKUP_SERVER) | |
699 | hints.ai_flags |= AI_PASSIVE; | |
700 | ||
701 | /* Note that |res| SHOULD be a 'struct addrinfo **' thanks to | |
706457b7 | 702 | * macro magic in bio_local.h |
28a0841b | 703 | */ |
be66a15c | 704 | # if defined(AI_ADDRCONFIG) && defined(AI_NUMERICHOST) |
3f91ede9 | 705 | retry: |
be66a15c | 706 | # endif |
ed03c461 | 707 | switch ((gai_ret = getaddrinfo(host, service, &hints, res))) { |
28a0841b RL |
708 | # ifdef EAI_SYSTEM |
709 | case EAI_SYSTEM: | |
ff988500 RS |
710 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), |
711 | "calling getaddrinfo()"); | |
5114d822 | 712 | BIOerr(BIO_F_BIO_LOOKUP_EX, ERR_R_SYS_LIB); |
28a0841b | 713 | break; |
91cb81d4 TM |
714 | # endif |
715 | # ifdef EAI_MEMORY | |
716 | case EAI_MEMORY: | |
717 | BIOerr(BIO_F_BIO_LOOKUP_EX, ERR_R_MALLOC_FAILURE); | |
718 | break; | |
28a0841b RL |
719 | # endif |
720 | case 0: | |
721 | ret = 1; /* Success */ | |
722 | break; | |
7f616a00 TM |
723 | default: |
724 | # if defined(AI_ADDRCONFIG) && defined(AI_NUMERICHOST) | |
3f91ede9 TM |
725 | if (hints.ai_flags & AI_ADDRCONFIG) { |
726 | hints.ai_flags &= ~AI_ADDRCONFIG; | |
7f616a00 | 727 | hints.ai_flags |= AI_NUMERICHOST; |
91cb81d4 | 728 | old_ret = gai_ret; |
3f91ede9 TM |
729 | goto retry; |
730 | } | |
3f91ede9 | 731 | # endif |
5114d822 | 732 | BIOerr(BIO_F_BIO_LOOKUP_EX, ERR_R_SYS_LIB); |
91cb81d4 | 733 | ERR_add_error_data(1, gai_strerror(old_ret ? old_ret : gai_ret)); |
28a0841b RL |
734 | break; |
735 | } | |
736 | } else { | |
737 | #endif | |
37e3daf4 | 738 | const struct hostent *he; |
fcd9c8c0 RL |
739 | /* |
740 | * Because struct hostent is defined for 32-bit pointers only with | |
741 | * VMS C, we need to make sure that '&he_fallback_address' and | |
742 | * '&he_fallback_addresses' are 32-bit pointers | |
743 | */ | |
744 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) | |
745 | # pragma pointer_size save | |
746 | # pragma pointer_size 32 | |
747 | #endif | |
28a0841b RL |
748 | /* Windows doesn't seem to have in_addr_t */ |
749 | #ifdef OPENSSL_SYS_WINDOWS | |
37e3daf4 | 750 | static uint32_t he_fallback_address; |
7fb4b92c MC |
751 | static const char *he_fallback_addresses[] = |
752 | { (char *)&he_fallback_address, NULL }; | |
28a0841b | 753 | #else |
37e3daf4 | 754 | static in_addr_t he_fallback_address; |
7fb4b92c MC |
755 | static const char *he_fallback_addresses[] = |
756 | { (char *)&he_fallback_address, NULL }; | |
28a0841b | 757 | #endif |
37e3daf4 KR |
758 | static const struct hostent he_fallback = |
759 | { NULL, NULL, AF_INET, sizeof(he_fallback_address), | |
760 | (char **)&he_fallback_addresses }; | |
fcd9c8c0 RL |
761 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) |
762 | # pragma pointer_size restore | |
763 | #endif | |
764 | ||
28a0841b | 765 | struct servent *se; |
8483a003 | 766 | /* Apparently, on WIN64, s_proto and s_port have traded places... */ |
28a0841b RL |
767 | #ifdef _WIN64 |
768 | struct servent se_fallback = { NULL, NULL, NULL, 0 }; | |
769 | #else | |
770 | struct servent se_fallback = { NULL, NULL, 0, NULL }; | |
771 | #endif | |
28a0841b | 772 | |
c2e4e5d2 | 773 | if (!RUN_ONCE(&bio_lookup_init, do_bio_lookup_init)) { |
5114d822 | 774 | BIOerr(BIO_F_BIO_LOOKUP_EX, ERR_R_MALLOC_FAILURE); |
c2e4e5d2 RL |
775 | ret = 0; |
776 | goto err; | |
777 | } | |
f989cd8c AG |
778 | |
779 | CRYPTO_THREAD_write_lock(bio_lookup_lock); | |
37e3daf4 | 780 | he_fallback_address = INADDR_ANY; |
28a0841b RL |
781 | if (host == NULL) { |
782 | he = &he_fallback; | |
783 | switch(lookup_type) { | |
784 | case BIO_LOOKUP_CLIENT: | |
785 | he_fallback_address = INADDR_LOOPBACK; | |
786 | break; | |
787 | case BIO_LOOKUP_SERVER: | |
788 | he_fallback_address = INADDR_ANY; | |
789 | break; | |
790 | default: | |
86f31dd9 MC |
791 | /* We forgot to handle a lookup type! */ |
792 | assert("We forgot to handle a lookup type!" == NULL); | |
793 | BIOerr(BIO_F_BIO_LOOKUP_EX, ERR_R_INTERNAL_ERROR); | |
794 | ret = 0; | |
795 | goto err; | |
28a0841b RL |
796 | } |
797 | } else { | |
798 | he = gethostbyname(host); | |
799 | ||
800 | if (he == NULL) { | |
c86d1f19 | 801 | #ifndef OPENSSL_SYS_WINDOWS |
3e49ee23 AP |
802 | /* |
803 | * This might be misleading, because h_errno is used as if | |
804 | * it was errno. To minimize mixup add 1000. Underlying | |
805 | * reason for this is that hstrerror is declared obsolete, | |
806 | * not to mention that a) h_errno is not always guaranteed | |
69687aa8 | 807 | * to be meaningless; b) hstrerror can reside in yet another |
3e49ee23 AP |
808 | * library, linking for sake of hstrerror is an overkill; |
809 | * c) this path is not executed on contemporary systems | |
810 | * anyway [above getaddrinfo/gai_strerror is]. We just let | |
811 | * system administrator figure this out... | |
812 | */ | |
5c8b7b4c KT |
813 | # if defined(OPENSSL_SYS_VXWORKS) |
814 | /* h_errno doesn't exist on VxWorks */ | |
ff988500 RS |
815 | ERR_raise_data(ERR_LIB_SYS, 1000, |
816 | "calling gethostbyname()"); | |
5c8b7b4c | 817 | # else |
ff988500 RS |
818 | ERR_raise_data(ERR_LIB_SYS, 1000 + h_errno, |
819 | "calling gethostbyname()"); | |
5c8b7b4c | 820 | # endif |
c86d1f19 | 821 | #else |
ff988500 RS |
822 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), |
823 | "calling gethostbyname()"); | |
c86d1f19 | 824 | #endif |
28a0841b RL |
825 | ret = 0; |
826 | goto err; | |
827 | } | |
828 | } | |
829 | ||
830 | if (service == NULL) { | |
831 | se_fallback.s_port = 0; | |
622c7e99 | 832 | se_fallback.s_proto = NULL; |
28a0841b RL |
833 | se = &se_fallback; |
834 | } else { | |
835 | char *endp = NULL; | |
836 | long portnum = strtol(service, &endp, 10); | |
fcd9c8c0 RL |
837 | |
838 | /* | |
839 | * Because struct servent is defined for 32-bit pointers only with | |
840 | * VMS C, we need to make sure that 'proto' is a 32-bit pointer. | |
841 | */ | |
842 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) | |
843 | # pragma pointer_size save | |
844 | # pragma pointer_size 32 | |
845 | #endif | |
622c7e99 | 846 | char *proto = NULL; |
fcd9c8c0 RL |
847 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) |
848 | # pragma pointer_size restore | |
849 | #endif | |
622c7e99 RL |
850 | |
851 | switch (socktype) { | |
852 | case SOCK_STREAM: | |
853 | proto = "tcp"; | |
854 | break; | |
855 | case SOCK_DGRAM: | |
856 | proto = "udp"; | |
857 | break; | |
858 | } | |
28a0841b RL |
859 | |
860 | if (endp != service && *endp == '\0' | |
861 | && portnum > 0 && portnum < 65536) { | |
3a63c0ed | 862 | se_fallback.s_port = htons((unsigned short)portnum); |
28a0841b RL |
863 | se_fallback.s_proto = proto; |
864 | se = &se_fallback; | |
865 | } else if (endp == service) { | |
28a0841b RL |
866 | se = getservbyname(service, proto); |
867 | ||
868 | if (se == NULL) { | |
ff988500 RS |
869 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), |
870 | "calling getservbyname()"); | |
28a0841b RL |
871 | goto err; |
872 | } | |
873 | } else { | |
5114d822 | 874 | BIOerr(BIO_F_BIO_LOOKUP_EX, BIO_R_MALFORMED_HOST_OR_SERVICE); |
28a0841b RL |
875 | goto err; |
876 | } | |
877 | } | |
878 | ||
879 | *res = NULL; | |
880 | ||
881 | { | |
fcd9c8c0 RL |
882 | /* |
883 | * Because hostent::h_addr_list is an array of 32-bit pointers with VMS C, | |
884 | * we must make sure our iterator designates the same element type, hence | |
885 | * the pointer size dance. | |
886 | */ | |
887 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) | |
888 | # pragma pointer_size save | |
889 | # pragma pointer_size 32 | |
890 | #endif | |
28a0841b | 891 | char **addrlistp; |
fcd9c8c0 RL |
892 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) |
893 | # pragma pointer_size restore | |
894 | #endif | |
28a0841b RL |
895 | size_t addresses; |
896 | BIO_ADDRINFO *tmp_bai = NULL; | |
897 | ||
898 | /* The easiest way to create a linked list from an | |
899 | array is to start from the back */ | |
900 | for(addrlistp = he->h_addr_list; *addrlistp != NULL; | |
901 | addrlistp++) | |
902 | ; | |
903 | ||
904 | for(addresses = addrlistp - he->h_addr_list; | |
905 | addrlistp--, addresses-- > 0; ) { | |
906 | if (!addrinfo_wrap(he->h_addrtype, socktype, | |
907 | *addrlistp, he->h_length, | |
908 | se->s_port, &tmp_bai)) | |
909 | goto addrinfo_malloc_err; | |
910 | tmp_bai->bai_next = *res; | |
911 | *res = tmp_bai; | |
912 | continue; | |
913 | addrinfo_malloc_err: | |
914 | BIO_ADDRINFO_free(*res); | |
915 | *res = NULL; | |
5114d822 | 916 | BIOerr(BIO_F_BIO_LOOKUP_EX, ERR_R_MALLOC_FAILURE); |
28a0841b RL |
917 | ret = 0; |
918 | goto err; | |
919 | } | |
920 | ||
921 | ret = 1; | |
922 | } | |
923 | err: | |
f989cd8c | 924 | CRYPTO_THREAD_unlock(bio_lookup_lock); |
28a0841b RL |
925 | } |
926 | ||
927 | return ret; | |
928 | } | |
ff234405 | 929 | |
1288f26f | 930 | #endif /* OPENSSL_NO_SOCK */ |