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b1322259 | 1 | /* |
fecb3aae | 2 | * Copyright 2016-2022 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 | ||
256d41d4 RL |
14 | /* |
15 | * VC configurations may define UNICODE, to indicate to the C RTL that | |
16 | * WCHAR functions are preferred. | |
17 | * This affects functions like gai_strerror(), which is implemented as | |
18 | * an alias macro for gai_strerrorA() (which returns a const char *) or | |
19 | * gai_strerrorW() (which returns a const WCHAR *). This source file | |
20 | * assumes POSIX declarations, so prefer the non-UNICODE definitions. | |
21 | */ | |
22 | #undef UNICODE | |
23 | ||
86f31dd9 | 24 | #include <assert.h> |
28a0841b RL |
25 | #include <string.h> |
26 | ||
706457b7 | 27 | #include "bio_local.h" |
5c4328f0 | 28 | #include <openssl/crypto.h> |
28a0841b | 29 | |
1288f26f | 30 | #ifndef OPENSSL_NO_SOCK |
28a0841b RL |
31 | #include <openssl/err.h> |
32 | #include <openssl/buffer.h> | |
176db6dc | 33 | #include "internal/thread_once.h" |
28a0841b | 34 | |
ff234405 | 35 | CRYPTO_RWLOCK *bio_lookup_lock; |
f989cd8c AG |
36 | static CRYPTO_ONCE bio_lookup_init = CRYPTO_ONCE_STATIC_INIT; |
37 | ||
28a0841b | 38 | /* |
706457b7 | 39 | * Throughout this file and bio_local.h, the existence of the macro |
28a0841b RL |
40 | * AI_PASSIVE is used to detect the availability of struct addrinfo, |
41 | * getnameinfo() and getaddrinfo(). If that macro doesn't exist, | |
42 | * we use our own implementation instead, using gethostbyname, | |
43 | * getservbyname and a few other. | |
44 | */ | |
45 | ||
46 | /********************************************************************** | |
47 | * | |
48 | * Address structure | |
49 | * | |
50 | */ | |
51 | ||
52 | BIO_ADDR *BIO_ADDR_new(void) | |
53 | { | |
43ecb9c3 RS |
54 | BIO_ADDR *ret = OPENSSL_zalloc(sizeof(*ret)); |
55 | ||
cb1d435c | 56 | if (ret == NULL) { |
9311d0c4 | 57 | ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE); |
138388fe | 58 | return NULL; |
cb1d435c | 59 | } |
138388fe | 60 | |
7d1d48a2 | 61 | ret->sa.sa_family = AF_UNSPEC; |
28a0841b RL |
62 | return ret; |
63 | } | |
64 | ||
65 | void BIO_ADDR_free(BIO_ADDR *ap) | |
66 | { | |
67 | OPENSSL_free(ap); | |
68 | } | |
69 | ||
a3e53d56 TS |
70 | BIO_ADDR *BIO_ADDR_dup(const BIO_ADDR *ap) |
71 | { | |
72 | BIO_ADDR *ret = NULL; | |
73 | ||
74 | if (ap != NULL) { | |
75 | ret = BIO_ADDR_new(); | |
76 | if (ret != NULL) | |
77 | memcpy(ret, ap, sizeof(BIO_ADDR)); | |
78 | } | |
79 | return ret; | |
80 | } | |
81 | ||
7d1d48a2 MC |
82 | void BIO_ADDR_clear(BIO_ADDR *ap) |
83 | { | |
84 | memset(ap, 0, sizeof(*ap)); | |
85 | ap->sa.sa_family = AF_UNSPEC; | |
86 | } | |
87 | ||
28a0841b RL |
88 | /* |
89 | * BIO_ADDR_make - non-public routine to fill a BIO_ADDR with the contents | |
90 | * of a struct sockaddr. | |
91 | */ | |
92 | int BIO_ADDR_make(BIO_ADDR *ap, const struct sockaddr *sa) | |
93 | { | |
94 | if (sa->sa_family == AF_INET) { | |
55bd917b | 95 | memcpy(&(ap->s_in), sa, sizeof(struct sockaddr_in)); |
28a0841b RL |
96 | return 1; |
97 | } | |
98 | #ifdef AF_INET6 | |
99 | if (sa->sa_family == AF_INET6) { | |
55bd917b | 100 | memcpy(&(ap->s_in6), sa, sizeof(struct sockaddr_in6)); |
28a0841b RL |
101 | return 1; |
102 | } | |
103 | #endif | |
104 | #ifdef AF_UNIX | |
17750375 | 105 | if (sa->sa_family == AF_UNIX) { |
55bd917b | 106 | memcpy(&(ap->s_un), sa, sizeof(struct sockaddr_un)); |
28a0841b RL |
107 | return 1; |
108 | } | |
109 | #endif | |
110 | ||
111 | return 0; | |
112 | } | |
113 | ||
114 | int BIO_ADDR_rawmake(BIO_ADDR *ap, int family, | |
115 | const void *where, size_t wherelen, | |
116 | unsigned short port) | |
117 | { | |
118 | #ifdef AF_UNIX | |
119 | if (family == AF_UNIX) { | |
29620124 | 120 | if (wherelen + 1 > sizeof(ap->s_un.sun_path)) |
28a0841b | 121 | return 0; |
29620124 RL |
122 | memset(&ap->s_un, 0, sizeof(ap->s_un)); |
123 | ap->s_un.sun_family = family; | |
124 | strncpy(ap->s_un.sun_path, where, sizeof(ap->s_un.sun_path) - 1); | |
28a0841b RL |
125 | return 1; |
126 | } | |
127 | #endif | |
128 | if (family == AF_INET) { | |
129 | if (wherelen != sizeof(struct in_addr)) | |
130 | return 0; | |
29620124 RL |
131 | memset(&ap->s_in, 0, sizeof(ap->s_in)); |
132 | ap->s_in.sin_family = family; | |
133 | ap->s_in.sin_port = port; | |
134 | ap->s_in.sin_addr = *(struct in_addr *)where; | |
28a0841b RL |
135 | return 1; |
136 | } | |
137 | #ifdef AF_INET6 | |
138 | if (family == AF_INET6) { | |
139 | if (wherelen != sizeof(struct in6_addr)) | |
140 | return 0; | |
29620124 RL |
141 | memset(&ap->s_in6, 0, sizeof(ap->s_in6)); |
142 | ap->s_in6.sin6_family = family; | |
143 | ap->s_in6.sin6_port = port; | |
144 | ap->s_in6.sin6_addr = *(struct in6_addr *)where; | |
28a0841b RL |
145 | return 1; |
146 | } | |
147 | #endif | |
148 | ||
149 | return 0; | |
150 | } | |
151 | ||
152 | int BIO_ADDR_family(const BIO_ADDR *ap) | |
153 | { | |
154 | return ap->sa.sa_family; | |
155 | } | |
156 | ||
157 | int BIO_ADDR_rawaddress(const BIO_ADDR *ap, void *p, size_t *l) | |
158 | { | |
159 | size_t len = 0; | |
160 | const void *addrptr = NULL; | |
161 | ||
162 | if (ap->sa.sa_family == AF_INET) { | |
29620124 RL |
163 | len = sizeof(ap->s_in.sin_addr); |
164 | addrptr = &ap->s_in.sin_addr; | |
28a0841b RL |
165 | } |
166 | #ifdef AF_INET6 | |
167 | else if (ap->sa.sa_family == AF_INET6) { | |
29620124 RL |
168 | len = sizeof(ap->s_in6.sin6_addr); |
169 | addrptr = &ap->s_in6.sin6_addr; | |
28a0841b RL |
170 | } |
171 | #endif | |
172 | #ifdef AF_UNIX | |
173 | else if (ap->sa.sa_family == AF_UNIX) { | |
29620124 RL |
174 | len = strlen(ap->s_un.sun_path); |
175 | addrptr = &ap->s_un.sun_path; | |
28a0841b RL |
176 | } |
177 | #endif | |
178 | ||
179 | if (addrptr == NULL) | |
180 | return 0; | |
181 | ||
182 | if (p != NULL) { | |
183 | memcpy(p, addrptr, len); | |
184 | } | |
185 | if (l != NULL) | |
186 | *l = len; | |
187 | ||
188 | return 1; | |
189 | } | |
190 | ||
191 | unsigned short BIO_ADDR_rawport(const BIO_ADDR *ap) | |
192 | { | |
193 | if (ap->sa.sa_family == AF_INET) | |
29620124 | 194 | return ap->s_in.sin_port; |
28a0841b RL |
195 | #ifdef AF_INET6 |
196 | if (ap->sa.sa_family == AF_INET6) | |
29620124 | 197 | return ap->s_in6.sin6_port; |
28a0841b RL |
198 | #endif |
199 | return 0; | |
200 | } | |
201 | ||
202 | /*- | |
203 | * addr_strings - helper function to get host and service names | |
204 | * @ap: the BIO_ADDR that has the input info | |
205 | * @numeric: 0 if actual names should be returned, 1 if the numeric | |
206 | * representation should be returned. | |
207 | * @hostname: a pointer to a pointer to a memory area to store the | |
208 | * host name or numeric representation. Unused if NULL. | |
209 | * @service: a pointer to a pointer to a memory area to store the | |
210 | * service name or numeric representation. Unused if NULL. | |
211 | * | |
212 | * The return value is 0 on failure, with the error code in the error | |
213 | * stack, and 1 on success. | |
214 | */ | |
215 | static int addr_strings(const BIO_ADDR *ap, int numeric, | |
216 | char **hostname, char **service) | |
217 | { | |
ed03c461 RL |
218 | if (BIO_sock_init() != 1) |
219 | return 0; | |
220 | ||
28a0841b RL |
221 | if (1) { |
222 | #ifdef AI_PASSIVE | |
223 | int ret = 0; | |
6faffd0a | 224 | char host[NI_MAXHOST] = "", serv[NI_MAXSERV] = ""; |
28a0841b RL |
225 | int flags = 0; |
226 | ||
227 | if (numeric) | |
228 | flags |= NI_NUMERICHOST | NI_NUMERICSERV; | |
229 | ||
230 | if ((ret = getnameinfo(BIO_ADDR_sockaddr(ap), | |
231 | BIO_ADDR_sockaddr_size(ap), | |
232 | host, sizeof(host), serv, sizeof(serv), | |
233 | flags)) != 0) { | |
234 | # ifdef EAI_SYSTEM | |
235 | if (ret == EAI_SYSTEM) { | |
ff988500 RS |
236 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), |
237 | "calling getnameinfo()"); | |
28a0841b RL |
238 | } else |
239 | # endif | |
240 | { | |
a150f8e1 | 241 | ERR_raise_data(ERR_LIB_BIO, ERR_R_SYS_LIB, gai_strerror(ret)); |
28a0841b RL |
242 | } |
243 | return 0; | |
244 | } | |
d40cf9bc | 245 | |
6faffd0a RL |
246 | /* VMS getnameinfo() has a bug, it doesn't fill in serv, which |
247 | * leaves it with whatever garbage that happens to be there. | |
248 | * However, we initialise serv with the empty string (serv[0] | |
249 | * is therefore NUL), so it gets real easy to detect when things | |
250 | * didn't go the way one might expect. | |
d40cf9bc | 251 | */ |
6faffd0a | 252 | if (serv[0] == '\0') { |
d40cf9bc RL |
253 | BIO_snprintf(serv, sizeof(serv), "%d", |
254 | ntohs(BIO_ADDR_rawport(ap))); | |
255 | } | |
256 | ||
24854e01 | 257 | if (hostname != NULL) |
28a0841b | 258 | *hostname = OPENSSL_strdup(host); |
24854e01 | 259 | if (service != NULL) |
28a0841b RL |
260 | *service = OPENSSL_strdup(serv); |
261 | } else { | |
262 | #endif | |
24854e01 | 263 | if (hostname != NULL) |
29620124 | 264 | *hostname = OPENSSL_strdup(inet_ntoa(ap->s_in.sin_addr)); |
24854e01 | 265 | if (service != NULL) { |
28a0841b | 266 | char serv[6]; /* port is 16 bits => max 5 decimal digits */ |
29620124 | 267 | BIO_snprintf(serv, sizeof(serv), "%d", ntohs(ap->s_in.sin_port)); |
28a0841b RL |
268 | *service = OPENSSL_strdup(serv); |
269 | } | |
270 | } | |
271 | ||
24854e01 MC |
272 | if ((hostname != NULL && *hostname == NULL) |
273 | || (service != NULL && *service == NULL)) { | |
274 | if (hostname != NULL) { | |
275 | OPENSSL_free(*hostname); | |
276 | *hostname = NULL; | |
277 | } | |
278 | if (service != NULL) { | |
279 | OPENSSL_free(*service); | |
280 | *service = NULL; | |
281 | } | |
9311d0c4 | 282 | ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE); |
24854e01 MC |
283 | return 0; |
284 | } | |
285 | ||
28a0841b RL |
286 | return 1; |
287 | } | |
288 | ||
289 | char *BIO_ADDR_hostname_string(const BIO_ADDR *ap, int numeric) | |
290 | { | |
291 | char *hostname = NULL; | |
292 | ||
293 | if (addr_strings(ap, numeric, &hostname, NULL)) | |
294 | return hostname; | |
295 | ||
296 | return NULL; | |
297 | } | |
298 | ||
299 | char *BIO_ADDR_service_string(const BIO_ADDR *ap, int numeric) | |
300 | { | |
301 | char *service = NULL; | |
302 | ||
303 | if (addr_strings(ap, numeric, NULL, &service)) | |
304 | return service; | |
305 | ||
306 | return NULL; | |
307 | } | |
308 | ||
309 | char *BIO_ADDR_path_string(const BIO_ADDR *ap) | |
310 | { | |
311 | #ifdef AF_UNIX | |
312 | if (ap->sa.sa_family == AF_UNIX) | |
29620124 | 313 | return OPENSSL_strdup(ap->s_un.sun_path); |
28a0841b RL |
314 | #endif |
315 | return NULL; | |
316 | } | |
317 | ||
318 | /* | |
319 | * BIO_ADDR_sockaddr - non-public routine to return the struct sockaddr | |
320 | * for a given BIO_ADDR. In reality, this is simply a type safe cast. | |
321 | * The returned struct sockaddr is const, so it can't be tampered with. | |
322 | */ | |
323 | const struct sockaddr *BIO_ADDR_sockaddr(const BIO_ADDR *ap) | |
324 | { | |
325 | return &(ap->sa); | |
326 | } | |
327 | ||
328 | /* | |
329 | * BIO_ADDR_sockaddr_noconst - non-public function that does the same | |
330 | * as BIO_ADDR_sockaddr, but returns a non-const. USE WITH CARE, as | |
331 | * it allows you to tamper with the data (and thereby the contents | |
332 | * of the input BIO_ADDR). | |
333 | */ | |
334 | struct sockaddr *BIO_ADDR_sockaddr_noconst(BIO_ADDR *ap) | |
335 | { | |
336 | return &(ap->sa); | |
337 | } | |
338 | ||
339 | /* | |
340 | * BIO_ADDR_sockaddr_size - non-public function that returns the size | |
341 | * of the struct sockaddr the BIO_ADDR is using. If the protocol family | |
342 | * isn't set or is something other than AF_INET, AF_INET6 or AF_UNIX, | |
343 | * the size of the BIO_ADDR type is returned. | |
344 | */ | |
345 | socklen_t BIO_ADDR_sockaddr_size(const BIO_ADDR *ap) | |
346 | { | |
347 | if (ap->sa.sa_family == AF_INET) | |
29620124 | 348 | return sizeof(ap->s_in); |
28a0841b RL |
349 | #ifdef AF_INET6 |
350 | if (ap->sa.sa_family == AF_INET6) | |
29620124 | 351 | return sizeof(ap->s_in6); |
28a0841b RL |
352 | #endif |
353 | #ifdef AF_UNIX | |
354 | if (ap->sa.sa_family == AF_UNIX) | |
29620124 | 355 | return sizeof(ap->s_un); |
28a0841b RL |
356 | #endif |
357 | return sizeof(*ap); | |
358 | } | |
359 | ||
360 | /********************************************************************** | |
361 | * | |
e5a82bfd | 362 | * Address info database |
28a0841b RL |
363 | * |
364 | */ | |
365 | ||
366 | const BIO_ADDRINFO *BIO_ADDRINFO_next(const BIO_ADDRINFO *bai) | |
367 | { | |
368 | if (bai != NULL) | |
369 | return bai->bai_next; | |
370 | return NULL; | |
371 | } | |
372 | ||
373 | int BIO_ADDRINFO_family(const BIO_ADDRINFO *bai) | |
374 | { | |
375 | if (bai != NULL) | |
376 | return bai->bai_family; | |
377 | return 0; | |
378 | } | |
379 | ||
380 | int BIO_ADDRINFO_socktype(const BIO_ADDRINFO *bai) | |
381 | { | |
382 | if (bai != NULL) | |
383 | return bai->bai_socktype; | |
384 | return 0; | |
385 | } | |
386 | ||
387 | int BIO_ADDRINFO_protocol(const BIO_ADDRINFO *bai) | |
388 | { | |
c72fb77f RL |
389 | if (bai != NULL) { |
390 | if (bai->bai_protocol != 0) | |
391 | return bai->bai_protocol; | |
392 | ||
393 | #ifdef AF_UNIX | |
394 | if (bai->bai_family == AF_UNIX) | |
395 | return 0; | |
396 | #endif | |
397 | ||
398 | switch (bai->bai_socktype) { | |
399 | case SOCK_STREAM: | |
400 | return IPPROTO_TCP; | |
401 | case SOCK_DGRAM: | |
402 | return IPPROTO_UDP; | |
403 | default: | |
404 | break; | |
405 | } | |
406 | } | |
28a0841b RL |
407 | return 0; |
408 | } | |
409 | ||
410 | /* | |
411 | * BIO_ADDRINFO_sockaddr_size - non-public function that returns the size | |
412 | * of the struct sockaddr inside the BIO_ADDRINFO. | |
413 | */ | |
414 | socklen_t BIO_ADDRINFO_sockaddr_size(const BIO_ADDRINFO *bai) | |
415 | { | |
416 | if (bai != NULL) | |
417 | return bai->bai_addrlen; | |
418 | return 0; | |
419 | } | |
420 | ||
421 | /* | |
422 | * BIO_ADDRINFO_sockaddr - non-public function that returns bai_addr | |
423 | * as the struct sockaddr it is. | |
424 | */ | |
425 | const struct sockaddr *BIO_ADDRINFO_sockaddr(const BIO_ADDRINFO *bai) | |
426 | { | |
427 | if (bai != NULL) | |
428 | return bai->bai_addr; | |
429 | return NULL; | |
430 | } | |
431 | ||
432 | const BIO_ADDR *BIO_ADDRINFO_address(const BIO_ADDRINFO *bai) | |
433 | { | |
434 | if (bai != NULL) | |
435 | return (BIO_ADDR *)bai->bai_addr; | |
436 | return NULL; | |
437 | } | |
438 | ||
439 | void BIO_ADDRINFO_free(BIO_ADDRINFO *bai) | |
440 | { | |
441 | if (bai == NULL) | |
442 | return; | |
443 | ||
444 | #ifdef AI_PASSIVE | |
445 | # ifdef AF_UNIX | |
446 | # define _cond bai->bai_family != AF_UNIX | |
447 | # else | |
448 | # define _cond 1 | |
449 | # endif | |
450 | if (_cond) { | |
451 | freeaddrinfo(bai); | |
452 | return; | |
453 | } | |
454 | #endif | |
455 | ||
456 | /* Free manually when we know that addrinfo_wrap() was used. | |
457 | * See further comment above addrinfo_wrap() | |
458 | */ | |
459 | while (bai != NULL) { | |
460 | BIO_ADDRINFO *next = bai->bai_next; | |
461 | OPENSSL_free(bai->bai_addr); | |
462 | OPENSSL_free(bai); | |
463 | bai = next; | |
464 | } | |
465 | } | |
466 | ||
467 | /********************************************************************** | |
468 | * | |
469 | * Service functions | |
470 | * | |
471 | */ | |
472 | ||
473 | /*- | |
474 | * The specs in hostserv can take these forms: | |
475 | * | |
476 | * host:service => *host = "host", *service = "service" | |
477 | * host:* => *host = "host", *service = NULL | |
478 | * host: => *host = "host", *service = NULL | |
479 | * :service => *host = NULL, *service = "service" | |
480 | * *:service => *host = NULL, *service = "service" | |
481 | * | |
482 | * in case no : is present in the string, the result depends on | |
483 | * hostserv_prio, as follows: | |
484 | * | |
485 | * when hostserv_prio == BIO_PARSE_PRIO_HOST | |
486 | * host => *host = "host", *service untouched | |
487 | * | |
488 | * when hostserv_prio == BIO_PARSE_PRIO_SERV | |
489 | * service => *host untouched, *service = "service" | |
490 | * | |
491 | */ | |
492 | int BIO_parse_hostserv(const char *hostserv, char **host, char **service, | |
493 | enum BIO_hostserv_priorities hostserv_prio) | |
494 | { | |
495 | const char *h = NULL; size_t hl = 0; | |
496 | const char *p = NULL; size_t pl = 0; | |
497 | ||
498 | if (*hostserv == '[') { | |
499 | if ((p = strchr(hostserv, ']')) == NULL) | |
500 | goto spec_err; | |
501 | h = hostserv + 1; | |
502 | hl = p - h; | |
503 | p++; | |
504 | if (*p == '\0') | |
505 | p = NULL; | |
506 | else if (*p != ':') | |
507 | goto spec_err; | |
508 | else { | |
509 | p++; | |
510 | pl = strlen(p); | |
511 | } | |
512 | } else { | |
513 | const char *p2 = strrchr(hostserv, ':'); | |
514 | p = strchr(hostserv, ':'); | |
515 | ||
516 | /*- | |
517 | * Check for more than one colon. There are three possible | |
518 | * interpretations: | |
519 | * 1. IPv6 address with port number, last colon being separator. | |
520 | * 2. IPv6 address only. | |
521 | * 3. IPv6 address only if hostserv_prio == BIO_PARSE_PRIO_HOST, | |
522 | * IPv6 address and port number if hostserv_prio == BIO_PARSE_PRIO_SERV | |
523 | * Because of this ambiguity, we currently choose to make it an | |
524 | * error. | |
525 | */ | |
526 | if (p != p2) | |
527 | goto amb_err; | |
528 | ||
529 | if (p != NULL) { | |
530 | h = hostserv; | |
531 | hl = p - h; | |
532 | p++; | |
533 | pl = strlen(p); | |
534 | } else if (hostserv_prio == BIO_PARSE_PRIO_HOST) { | |
535 | h = hostserv; | |
536 | hl = strlen(h); | |
537 | } else { | |
538 | p = hostserv; | |
539 | pl = strlen(p); | |
540 | } | |
541 | } | |
542 | ||
80926502 | 543 | if (p != NULL && strchr(p, ':')) |
28a0841b RL |
544 | goto spec_err; |
545 | ||
546 | if (h != NULL && host != NULL) { | |
547 | if (hl == 0 | |
548 | || (hl == 1 && h[0] == '*')) { | |
549 | *host = NULL; | |
550 | } else { | |
551 | *host = OPENSSL_strndup(h, hl); | |
552 | if (*host == NULL) | |
553 | goto memerr; | |
554 | } | |
555 | } | |
556 | if (p != NULL && service != NULL) { | |
557 | if (pl == 0 | |
558 | || (pl == 1 && p[0] == '*')) { | |
559 | *service = NULL; | |
560 | } else { | |
561 | *service = OPENSSL_strndup(p, pl); | |
562 | if (*service == NULL) | |
563 | goto memerr; | |
564 | } | |
565 | } | |
566 | ||
567 | return 1; | |
568 | amb_err: | |
9311d0c4 | 569 | ERR_raise(ERR_LIB_BIO, BIO_R_AMBIGUOUS_HOST_OR_SERVICE); |
28a0841b RL |
570 | return 0; |
571 | spec_err: | |
9311d0c4 | 572 | ERR_raise(ERR_LIB_BIO, BIO_R_MALFORMED_HOST_OR_SERVICE); |
28a0841b RL |
573 | return 0; |
574 | memerr: | |
9311d0c4 | 575 | ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE); |
28a0841b RL |
576 | return 0; |
577 | } | |
578 | ||
579 | /* addrinfo_wrap is used to build our own addrinfo "chain". | |
580 | * (it has only one entry, so calling it a chain may be a stretch) | |
581 | * It should ONLY be called when getaddrinfo() and friends | |
582 | * aren't available, OR when dealing with a non IP protocol | |
583 | * family, such as AF_UNIX | |
584 | * | |
585 | * the return value is 1 on success, or 0 on failure, which | |
8483a003 | 586 | * only happens if a memory allocation error occurred. |
28a0841b RL |
587 | */ |
588 | static int addrinfo_wrap(int family, int socktype, | |
589 | const void *where, size_t wherelen, | |
590 | unsigned short port, | |
591 | BIO_ADDRINFO **bai) | |
592 | { | |
cdb10bae | 593 | if ((*bai = OPENSSL_zalloc(sizeof(**bai))) == NULL) { |
9311d0c4 | 594 | ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE); |
28a0841b | 595 | return 0; |
cdb10bae | 596 | } |
43ecb9c3 | 597 | |
28a0841b RL |
598 | (*bai)->bai_family = family; |
599 | (*bai)->bai_socktype = socktype; | |
600 | if (socktype == SOCK_STREAM) | |
601 | (*bai)->bai_protocol = IPPROTO_TCP; | |
602 | if (socktype == SOCK_DGRAM) | |
603 | (*bai)->bai_protocol = IPPROTO_UDP; | |
604 | #ifdef AF_UNIX | |
605 | if (family == AF_UNIX) | |
606 | (*bai)->bai_protocol = 0; | |
607 | #endif | |
608 | { | |
609 | /* Magic: We know that BIO_ADDR_sockaddr_noconst is really | |
610 | just an advanced cast of BIO_ADDR* to struct sockaddr * | |
611 | by the power of union, so while it may seem that we're | |
612 | creating a memory leak here, we are not. It will be | |
613 | all right. */ | |
614 | BIO_ADDR *addr = BIO_ADDR_new(); | |
615 | if (addr != NULL) { | |
616 | BIO_ADDR_rawmake(addr, family, where, wherelen, port); | |
617 | (*bai)->bai_addr = BIO_ADDR_sockaddr_noconst(addr); | |
618 | } | |
619 | } | |
620 | (*bai)->bai_next = NULL; | |
621 | if ((*bai)->bai_addr == NULL) { | |
622 | BIO_ADDRINFO_free(*bai); | |
623 | *bai = NULL; | |
624 | return 0; | |
625 | } | |
626 | return 1; | |
627 | } | |
628 | ||
c2e4e5d2 | 629 | DEFINE_RUN_ONCE_STATIC(do_bio_lookup_init) |
f989cd8c | 630 | { |
63ab5ea1 | 631 | bio_lookup_lock = CRYPTO_THREAD_lock_new(); |
5a7ad1f0 | 632 | return bio_lookup_lock != NULL; |
f989cd8c AG |
633 | } |
634 | ||
5114d822 MC |
635 | int BIO_lookup(const char *host, const char *service, |
636 | enum BIO_lookup_type lookup_type, | |
637 | int family, int socktype, BIO_ADDRINFO **res) | |
638 | { | |
639 | return BIO_lookup_ex(host, service, lookup_type, family, socktype, 0, res); | |
640 | } | |
641 | ||
28a0841b | 642 | /*- |
d318fc95 DDO |
643 | * BIO_lookup_ex - look up the host and service you want to connect to. |
644 | * @host: the host (or node, in case family == AF_UNIX) you want to connect to. | |
28a0841b RL |
645 | * @service: the service you want to connect to. |
646 | * @lookup_type: declare intent with the result, client or server. | |
647 | * @family: the address family you want to use. Use AF_UNSPEC for any, or | |
648 | * AF_INET, AF_INET6 or AF_UNIX. | |
649 | * @socktype: The socket type you want to use. Can be SOCK_STREAM, SOCK_DGRAM | |
650 | * or 0 for all. | |
5114d822 MC |
651 | * @protocol: The protocol to use, e.g. IPPROTO_TCP or IPPROTO_UDP or 0 for all. |
652 | * Note that some platforms may not return IPPROTO_SCTP without | |
653 | * explicitly requesting it (i.e. IPPROTO_SCTP may not be returned | |
654 | * with 0 for the protocol) | |
28a0841b RL |
655 | * @res: Storage place for the resulting list of returned addresses |
656 | * | |
d318fc95 | 657 | * This will do a lookup of the host and service that you want to connect to. |
28a0841b RL |
658 | * It returns a linked list of different addresses you can try to connect to. |
659 | * | |
660 | * When no longer needed you should call BIO_ADDRINFO_free() to free the result. | |
661 | * | |
662 | * The return value is 1 on success or 0 in case of error. | |
663 | */ | |
e8291428 | 664 | int BIO_lookup_ex(const char *host, const char *service, int lookup_type, |
5114d822 | 665 | int family, int socktype, int protocol, BIO_ADDRINFO **res) |
28a0841b RL |
666 | { |
667 | int ret = 0; /* Assume failure */ | |
668 | ||
1287dabd | 669 | switch (family) { |
28a0841b RL |
670 | case AF_INET: |
671 | #ifdef AF_INET6 | |
672 | case AF_INET6: | |
673 | #endif | |
674 | #ifdef AF_UNIX | |
675 | case AF_UNIX: | |
676 | #endif | |
677 | #ifdef AF_UNSPEC | |
678 | case AF_UNSPEC: | |
679 | #endif | |
680 | break; | |
681 | default: | |
9311d0c4 | 682 | ERR_raise(ERR_LIB_BIO, BIO_R_UNSUPPORTED_PROTOCOL_FAMILY); |
28a0841b RL |
683 | return 0; |
684 | } | |
685 | ||
686 | #ifdef AF_UNIX | |
687 | if (family == AF_UNIX) { | |
688 | if (addrinfo_wrap(family, socktype, host, strlen(host), 0, res)) | |
689 | return 1; | |
690 | else | |
9311d0c4 | 691 | ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE); |
28a0841b RL |
692 | return 0; |
693 | } | |
694 | #endif | |
695 | ||
ed03c461 RL |
696 | if (BIO_sock_init() != 1) |
697 | return 0; | |
698 | ||
28a0841b RL |
699 | if (1) { |
700 | #ifdef AI_PASSIVE | |
91cb81d4 | 701 | int gai_ret = 0, old_ret = 0; |
28a0841b | 702 | struct addrinfo hints; |
3e49ee23 | 703 | |
cbe29648 | 704 | memset(&hints, 0, sizeof(hints)); |
28a0841b | 705 | |
28a0841b RL |
706 | hints.ai_family = family; |
707 | hints.ai_socktype = socktype; | |
5114d822 | 708 | hints.ai_protocol = protocol; |
91cb81d4 TM |
709 | # ifdef AI_ADDRCONFIG |
710 | # ifdef AF_UNSPEC | |
15729bef | 711 | if (host != NULL && family == AF_UNSPEC) |
91cb81d4 | 712 | # endif |
b8472b4e | 713 | hints.ai_flags |= AI_ADDRCONFIG; |
91cb81d4 | 714 | # endif |
28a0841b RL |
715 | |
716 | if (lookup_type == BIO_LOOKUP_SERVER) | |
717 | hints.ai_flags |= AI_PASSIVE; | |
718 | ||
719 | /* Note that |res| SHOULD be a 'struct addrinfo **' thanks to | |
706457b7 | 720 | * macro magic in bio_local.h |
28a0841b | 721 | */ |
be66a15c | 722 | # if defined(AI_ADDRCONFIG) && defined(AI_NUMERICHOST) |
3f91ede9 | 723 | retry: |
be66a15c | 724 | # endif |
ed03c461 | 725 | switch ((gai_ret = getaddrinfo(host, service, &hints, res))) { |
28a0841b RL |
726 | # ifdef EAI_SYSTEM |
727 | case EAI_SYSTEM: | |
ff988500 RS |
728 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), |
729 | "calling getaddrinfo()"); | |
9311d0c4 | 730 | ERR_raise(ERR_LIB_BIO, ERR_R_SYS_LIB); |
28a0841b | 731 | break; |
91cb81d4 TM |
732 | # endif |
733 | # ifdef EAI_MEMORY | |
734 | case EAI_MEMORY: | |
9311d0c4 | 735 | ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE); |
91cb81d4 | 736 | break; |
28a0841b RL |
737 | # endif |
738 | case 0: | |
739 | ret = 1; /* Success */ | |
740 | break; | |
7f616a00 TM |
741 | default: |
742 | # if defined(AI_ADDRCONFIG) && defined(AI_NUMERICHOST) | |
3f91ede9 TM |
743 | if (hints.ai_flags & AI_ADDRCONFIG) { |
744 | hints.ai_flags &= ~AI_ADDRCONFIG; | |
7f616a00 | 745 | hints.ai_flags |= AI_NUMERICHOST; |
91cb81d4 | 746 | old_ret = gai_ret; |
3f91ede9 TM |
747 | goto retry; |
748 | } | |
3f91ede9 | 749 | # endif |
a150f8e1 RL |
750 | ERR_raise_data(ERR_LIB_BIO, ERR_R_SYS_LIB, |
751 | gai_strerror(old_ret ? old_ret : gai_ret)); | |
28a0841b RL |
752 | break; |
753 | } | |
754 | } else { | |
755 | #endif | |
37e3daf4 | 756 | const struct hostent *he; |
fcd9c8c0 RL |
757 | /* |
758 | * Because struct hostent is defined for 32-bit pointers only with | |
759 | * VMS C, we need to make sure that '&he_fallback_address' and | |
760 | * '&he_fallback_addresses' are 32-bit pointers | |
761 | */ | |
762 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) | |
763 | # pragma pointer_size save | |
764 | # pragma pointer_size 32 | |
765 | #endif | |
28a0841b | 766 | /* Windows doesn't seem to have in_addr_t */ |
b9b211fc | 767 | #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS) |
37e3daf4 | 768 | static uint32_t he_fallback_address; |
7fb4b92c MC |
769 | static const char *he_fallback_addresses[] = |
770 | { (char *)&he_fallback_address, NULL }; | |
28a0841b | 771 | #else |
37e3daf4 | 772 | static in_addr_t he_fallback_address; |
7fb4b92c MC |
773 | static const char *he_fallback_addresses[] = |
774 | { (char *)&he_fallback_address, NULL }; | |
28a0841b | 775 | #endif |
37e3daf4 KR |
776 | static const struct hostent he_fallback = |
777 | { NULL, NULL, AF_INET, sizeof(he_fallback_address), | |
778 | (char **)&he_fallback_addresses }; | |
fcd9c8c0 RL |
779 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) |
780 | # pragma pointer_size restore | |
781 | #endif | |
782 | ||
28a0841b | 783 | struct servent *se; |
8483a003 | 784 | /* Apparently, on WIN64, s_proto and s_port have traded places... */ |
28a0841b RL |
785 | #ifdef _WIN64 |
786 | struct servent se_fallback = { NULL, NULL, NULL, 0 }; | |
787 | #else | |
788 | struct servent se_fallback = { NULL, NULL, 0, NULL }; | |
789 | #endif | |
28a0841b | 790 | |
c2e4e5d2 | 791 | if (!RUN_ONCE(&bio_lookup_init, do_bio_lookup_init)) { |
9311d0c4 | 792 | ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE); |
c2e4e5d2 RL |
793 | ret = 0; |
794 | goto err; | |
795 | } | |
f989cd8c | 796 | |
cd3f8c1b RS |
797 | if (!CRYPTO_THREAD_write_lock(bio_lookup_lock)) { |
798 | ret = 0; | |
799 | goto err; | |
800 | } | |
37e3daf4 | 801 | he_fallback_address = INADDR_ANY; |
28a0841b RL |
802 | if (host == NULL) { |
803 | he = &he_fallback; | |
1287dabd | 804 | switch (lookup_type) { |
28a0841b RL |
805 | case BIO_LOOKUP_CLIENT: |
806 | he_fallback_address = INADDR_LOOPBACK; | |
807 | break; | |
808 | case BIO_LOOKUP_SERVER: | |
809 | he_fallback_address = INADDR_ANY; | |
810 | break; | |
811 | default: | |
86f31dd9 MC |
812 | /* We forgot to handle a lookup type! */ |
813 | assert("We forgot to handle a lookup type!" == NULL); | |
9311d0c4 | 814 | ERR_raise(ERR_LIB_BIO, ERR_R_INTERNAL_ERROR); |
86f31dd9 MC |
815 | ret = 0; |
816 | goto err; | |
28a0841b RL |
817 | } |
818 | } else { | |
819 | he = gethostbyname(host); | |
820 | ||
821 | if (he == NULL) { | |
c86d1f19 | 822 | #ifndef OPENSSL_SYS_WINDOWS |
3e49ee23 AP |
823 | /* |
824 | * This might be misleading, because h_errno is used as if | |
825 | * it was errno. To minimize mixup add 1000. Underlying | |
826 | * reason for this is that hstrerror is declared obsolete, | |
827 | * not to mention that a) h_errno is not always guaranteed | |
69687aa8 | 828 | * to be meaningless; b) hstrerror can reside in yet another |
3e49ee23 AP |
829 | * library, linking for sake of hstrerror is an overkill; |
830 | * c) this path is not executed on contemporary systems | |
831 | * anyway [above getaddrinfo/gai_strerror is]. We just let | |
832 | * system administrator figure this out... | |
833 | */ | |
5c8b7b4c KT |
834 | # if defined(OPENSSL_SYS_VXWORKS) |
835 | /* h_errno doesn't exist on VxWorks */ | |
ff988500 RS |
836 | ERR_raise_data(ERR_LIB_SYS, 1000, |
837 | "calling gethostbyname()"); | |
5c8b7b4c | 838 | # else |
ff988500 RS |
839 | ERR_raise_data(ERR_LIB_SYS, 1000 + h_errno, |
840 | "calling gethostbyname()"); | |
5c8b7b4c | 841 | # endif |
c86d1f19 | 842 | #else |
ff988500 RS |
843 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), |
844 | "calling gethostbyname()"); | |
c86d1f19 | 845 | #endif |
28a0841b RL |
846 | ret = 0; |
847 | goto err; | |
848 | } | |
849 | } | |
850 | ||
851 | if (service == NULL) { | |
852 | se_fallback.s_port = 0; | |
622c7e99 | 853 | se_fallback.s_proto = NULL; |
28a0841b RL |
854 | se = &se_fallback; |
855 | } else { | |
856 | char *endp = NULL; | |
857 | long portnum = strtol(service, &endp, 10); | |
fcd9c8c0 RL |
858 | |
859 | /* | |
860 | * Because struct servent is defined for 32-bit pointers only with | |
861 | * VMS C, we need to make sure that 'proto' is a 32-bit pointer. | |
862 | */ | |
863 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) | |
864 | # pragma pointer_size save | |
865 | # pragma pointer_size 32 | |
866 | #endif | |
622c7e99 | 867 | char *proto = NULL; |
fcd9c8c0 RL |
868 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) |
869 | # pragma pointer_size restore | |
870 | #endif | |
622c7e99 RL |
871 | |
872 | switch (socktype) { | |
873 | case SOCK_STREAM: | |
874 | proto = "tcp"; | |
875 | break; | |
876 | case SOCK_DGRAM: | |
877 | proto = "udp"; | |
878 | break; | |
879 | } | |
28a0841b RL |
880 | |
881 | if (endp != service && *endp == '\0' | |
882 | && portnum > 0 && portnum < 65536) { | |
3a63c0ed | 883 | se_fallback.s_port = htons((unsigned short)portnum); |
28a0841b RL |
884 | se_fallback.s_proto = proto; |
885 | se = &se_fallback; | |
886 | } else if (endp == service) { | |
28a0841b RL |
887 | se = getservbyname(service, proto); |
888 | ||
889 | if (se == NULL) { | |
ff988500 RS |
890 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), |
891 | "calling getservbyname()"); | |
28a0841b RL |
892 | goto err; |
893 | } | |
894 | } else { | |
9311d0c4 | 895 | ERR_raise(ERR_LIB_BIO, BIO_R_MALFORMED_HOST_OR_SERVICE); |
28a0841b RL |
896 | goto err; |
897 | } | |
898 | } | |
899 | ||
900 | *res = NULL; | |
901 | ||
902 | { | |
fcd9c8c0 RL |
903 | /* |
904 | * Because hostent::h_addr_list is an array of 32-bit pointers with VMS C, | |
905 | * we must make sure our iterator designates the same element type, hence | |
906 | * the pointer size dance. | |
907 | */ | |
908 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) | |
909 | # pragma pointer_size save | |
910 | # pragma pointer_size 32 | |
911 | #endif | |
28a0841b | 912 | char **addrlistp; |
fcd9c8c0 RL |
913 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) |
914 | # pragma pointer_size restore | |
915 | #endif | |
28a0841b RL |
916 | size_t addresses; |
917 | BIO_ADDRINFO *tmp_bai = NULL; | |
918 | ||
919 | /* The easiest way to create a linked list from an | |
920 | array is to start from the back */ | |
1287dabd | 921 | for (addrlistp = he->h_addr_list; *addrlistp != NULL; |
922 | addrlistp++) | |
28a0841b RL |
923 | ; |
924 | ||
1287dabd | 925 | for (addresses = addrlistp - he->h_addr_list; |
926 | addrlistp--, addresses-- > 0; ) { | |
28a0841b RL |
927 | if (!addrinfo_wrap(he->h_addrtype, socktype, |
928 | *addrlistp, he->h_length, | |
929 | se->s_port, &tmp_bai)) | |
930 | goto addrinfo_malloc_err; | |
931 | tmp_bai->bai_next = *res; | |
932 | *res = tmp_bai; | |
933 | continue; | |
934 | addrinfo_malloc_err: | |
935 | BIO_ADDRINFO_free(*res); | |
936 | *res = NULL; | |
9311d0c4 | 937 | ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE); |
28a0841b RL |
938 | ret = 0; |
939 | goto err; | |
940 | } | |
941 | ||
942 | ret = 1; | |
943 | } | |
944 | err: | |
f989cd8c | 945 | CRYPTO_THREAD_unlock(bio_lookup_lock); |
28a0841b RL |
946 | } |
947 | ||
948 | return ret; | |
949 | } | |
ff234405 | 950 | |
1288f26f | 951 | #endif /* OPENSSL_NO_SOCK */ |