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b1322259 | 1 | /* |
a1df06b3 | 2 | * Copyright 2016-2017 The OpenSSL Project Authors. All Rights Reserved. |
28a0841b | 3 | * |
b1322259 RS |
4 | * Licensed under the OpenSSL license (the "License"). You may not use |
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 | ||
86f31dd9 | 10 | #include <assert.h> |
28a0841b RL |
11 | #include <string.h> |
12 | ||
13 | #include "bio_lcl.h" | |
5c4328f0 | 14 | #include <openssl/crypto.h> |
28a0841b | 15 | |
1288f26f | 16 | #ifndef OPENSSL_NO_SOCK |
28a0841b RL |
17 | #include <openssl/err.h> |
18 | #include <openssl/buffer.h> | |
176db6dc | 19 | #include "internal/thread_once.h" |
28a0841b | 20 | |
ff234405 | 21 | CRYPTO_RWLOCK *bio_lookup_lock; |
f989cd8c AG |
22 | static CRYPTO_ONCE bio_lookup_init = CRYPTO_ONCE_STATIC_INIT; |
23 | ||
28a0841b RL |
24 | /* |
25 | * Throughout this file and bio_lcl.h, the existence of the macro | |
26 | * AI_PASSIVE is used to detect the availability of struct addrinfo, | |
27 | * getnameinfo() and getaddrinfo(). If that macro doesn't exist, | |
28 | * we use our own implementation instead, using gethostbyname, | |
29 | * getservbyname and a few other. | |
30 | */ | |
31 | ||
32 | /********************************************************************** | |
33 | * | |
34 | * Address structure | |
35 | * | |
36 | */ | |
37 | ||
38 | BIO_ADDR *BIO_ADDR_new(void) | |
39 | { | |
43ecb9c3 RS |
40 | BIO_ADDR *ret = OPENSSL_zalloc(sizeof(*ret)); |
41 | ||
cb1d435c MRA |
42 | if (ret == NULL) { |
43 | BIOerr(BIO_F_BIO_ADDR_NEW, ERR_R_MALLOC_FAILURE); | |
138388fe | 44 | return NULL; |
cb1d435c | 45 | } |
138388fe | 46 | |
7d1d48a2 | 47 | ret->sa.sa_family = AF_UNSPEC; |
28a0841b RL |
48 | return ret; |
49 | } | |
50 | ||
51 | void BIO_ADDR_free(BIO_ADDR *ap) | |
52 | { | |
53 | OPENSSL_free(ap); | |
54 | } | |
55 | ||
7d1d48a2 MC |
56 | void BIO_ADDR_clear(BIO_ADDR *ap) |
57 | { | |
58 | memset(ap, 0, sizeof(*ap)); | |
59 | ap->sa.sa_family = AF_UNSPEC; | |
60 | } | |
61 | ||
28a0841b RL |
62 | /* |
63 | * BIO_ADDR_make - non-public routine to fill a BIO_ADDR with the contents | |
64 | * of a struct sockaddr. | |
65 | */ | |
66 | int BIO_ADDR_make(BIO_ADDR *ap, const struct sockaddr *sa) | |
67 | { | |
68 | if (sa->sa_family == AF_INET) { | |
29620124 | 69 | ap->s_in = *(const struct sockaddr_in *)sa; |
28a0841b RL |
70 | return 1; |
71 | } | |
72 | #ifdef AF_INET6 | |
73 | if (sa->sa_family == AF_INET6) { | |
29620124 | 74 | ap->s_in6 = *(const struct sockaddr_in6 *)sa; |
28a0841b RL |
75 | return 1; |
76 | } | |
77 | #endif | |
78 | #ifdef AF_UNIX | |
17750375 | 79 | if (sa->sa_family == AF_UNIX) { |
29620124 | 80 | ap->s_un = *(const struct sockaddr_un *)sa; |
28a0841b RL |
81 | return 1; |
82 | } | |
83 | #endif | |
84 | ||
85 | return 0; | |
86 | } | |
87 | ||
88 | int BIO_ADDR_rawmake(BIO_ADDR *ap, int family, | |
89 | const void *where, size_t wherelen, | |
90 | unsigned short port) | |
91 | { | |
92 | #ifdef AF_UNIX | |
93 | if (family == AF_UNIX) { | |
29620124 | 94 | if (wherelen + 1 > sizeof(ap->s_un.sun_path)) |
28a0841b | 95 | return 0; |
29620124 RL |
96 | memset(&ap->s_un, 0, sizeof(ap->s_un)); |
97 | ap->s_un.sun_family = family; | |
98 | strncpy(ap->s_un.sun_path, where, sizeof(ap->s_un.sun_path) - 1); | |
28a0841b RL |
99 | return 1; |
100 | } | |
101 | #endif | |
102 | if (family == AF_INET) { | |
103 | if (wherelen != sizeof(struct in_addr)) | |
104 | return 0; | |
29620124 RL |
105 | memset(&ap->s_in, 0, sizeof(ap->s_in)); |
106 | ap->s_in.sin_family = family; | |
107 | ap->s_in.sin_port = port; | |
108 | ap->s_in.sin_addr = *(struct in_addr *)where; | |
28a0841b RL |
109 | return 1; |
110 | } | |
111 | #ifdef AF_INET6 | |
112 | if (family == AF_INET6) { | |
113 | if (wherelen != sizeof(struct in6_addr)) | |
114 | return 0; | |
29620124 RL |
115 | memset(&ap->s_in6, 0, sizeof(ap->s_in6)); |
116 | ap->s_in6.sin6_family = family; | |
117 | ap->s_in6.sin6_port = port; | |
118 | ap->s_in6.sin6_addr = *(struct in6_addr *)where; | |
28a0841b RL |
119 | return 1; |
120 | } | |
121 | #endif | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
126 | int BIO_ADDR_family(const BIO_ADDR *ap) | |
127 | { | |
128 | return ap->sa.sa_family; | |
129 | } | |
130 | ||
131 | int BIO_ADDR_rawaddress(const BIO_ADDR *ap, void *p, size_t *l) | |
132 | { | |
133 | size_t len = 0; | |
134 | const void *addrptr = NULL; | |
135 | ||
136 | if (ap->sa.sa_family == AF_INET) { | |
29620124 RL |
137 | len = sizeof(ap->s_in.sin_addr); |
138 | addrptr = &ap->s_in.sin_addr; | |
28a0841b RL |
139 | } |
140 | #ifdef AF_INET6 | |
141 | else if (ap->sa.sa_family == AF_INET6) { | |
29620124 RL |
142 | len = sizeof(ap->s_in6.sin6_addr); |
143 | addrptr = &ap->s_in6.sin6_addr; | |
28a0841b RL |
144 | } |
145 | #endif | |
146 | #ifdef AF_UNIX | |
147 | else if (ap->sa.sa_family == AF_UNIX) { | |
29620124 RL |
148 | len = strlen(ap->s_un.sun_path); |
149 | addrptr = &ap->s_un.sun_path; | |
28a0841b RL |
150 | } |
151 | #endif | |
152 | ||
153 | if (addrptr == NULL) | |
154 | return 0; | |
155 | ||
156 | if (p != NULL) { | |
157 | memcpy(p, addrptr, len); | |
158 | } | |
159 | if (l != NULL) | |
160 | *l = len; | |
161 | ||
162 | return 1; | |
163 | } | |
164 | ||
165 | unsigned short BIO_ADDR_rawport(const BIO_ADDR *ap) | |
166 | { | |
167 | if (ap->sa.sa_family == AF_INET) | |
29620124 | 168 | return ap->s_in.sin_port; |
28a0841b RL |
169 | #ifdef AF_INET6 |
170 | if (ap->sa.sa_family == AF_INET6) | |
29620124 | 171 | return ap->s_in6.sin6_port; |
28a0841b RL |
172 | #endif |
173 | return 0; | |
174 | } | |
175 | ||
176 | /*- | |
177 | * addr_strings - helper function to get host and service names | |
178 | * @ap: the BIO_ADDR that has the input info | |
179 | * @numeric: 0 if actual names should be returned, 1 if the numeric | |
180 | * representation should be returned. | |
181 | * @hostname: a pointer to a pointer to a memory area to store the | |
182 | * host name or numeric representation. Unused if NULL. | |
183 | * @service: a pointer to a pointer to a memory area to store the | |
184 | * service name or numeric representation. Unused if NULL. | |
185 | * | |
186 | * The return value is 0 on failure, with the error code in the error | |
187 | * stack, and 1 on success. | |
188 | */ | |
189 | static int addr_strings(const BIO_ADDR *ap, int numeric, | |
190 | char **hostname, char **service) | |
191 | { | |
ed03c461 RL |
192 | if (BIO_sock_init() != 1) |
193 | return 0; | |
194 | ||
28a0841b RL |
195 | if (1) { |
196 | #ifdef AI_PASSIVE | |
197 | int ret = 0; | |
6faffd0a | 198 | char host[NI_MAXHOST] = "", serv[NI_MAXSERV] = ""; |
28a0841b RL |
199 | int flags = 0; |
200 | ||
201 | if (numeric) | |
202 | flags |= NI_NUMERICHOST | NI_NUMERICSERV; | |
203 | ||
204 | if ((ret = getnameinfo(BIO_ADDR_sockaddr(ap), | |
205 | BIO_ADDR_sockaddr_size(ap), | |
206 | host, sizeof(host), serv, sizeof(serv), | |
207 | flags)) != 0) { | |
208 | # ifdef EAI_SYSTEM | |
209 | if (ret == EAI_SYSTEM) { | |
210 | SYSerr(SYS_F_GETNAMEINFO, get_last_socket_error()); | |
211 | BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); | |
212 | } else | |
213 | # endif | |
214 | { | |
215 | BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); | |
216 | ERR_add_error_data(1, gai_strerror(ret)); | |
217 | } | |
218 | return 0; | |
219 | } | |
d40cf9bc | 220 | |
6faffd0a RL |
221 | /* VMS getnameinfo() has a bug, it doesn't fill in serv, which |
222 | * leaves it with whatever garbage that happens to be there. | |
223 | * However, we initialise serv with the empty string (serv[0] | |
224 | * is therefore NUL), so it gets real easy to detect when things | |
225 | * didn't go the way one might expect. | |
d40cf9bc | 226 | */ |
6faffd0a | 227 | if (serv[0] == '\0') { |
d40cf9bc RL |
228 | BIO_snprintf(serv, sizeof(serv), "%d", |
229 | ntohs(BIO_ADDR_rawport(ap))); | |
230 | } | |
231 | ||
24854e01 | 232 | if (hostname != NULL) |
28a0841b | 233 | *hostname = OPENSSL_strdup(host); |
24854e01 | 234 | if (service != NULL) |
28a0841b RL |
235 | *service = OPENSSL_strdup(serv); |
236 | } else { | |
237 | #endif | |
24854e01 | 238 | if (hostname != NULL) |
29620124 | 239 | *hostname = OPENSSL_strdup(inet_ntoa(ap->s_in.sin_addr)); |
24854e01 | 240 | if (service != NULL) { |
28a0841b | 241 | char serv[6]; /* port is 16 bits => max 5 decimal digits */ |
29620124 | 242 | BIO_snprintf(serv, sizeof(serv), "%d", ntohs(ap->s_in.sin_port)); |
28a0841b RL |
243 | *service = OPENSSL_strdup(serv); |
244 | } | |
245 | } | |
246 | ||
24854e01 MC |
247 | if ((hostname != NULL && *hostname == NULL) |
248 | || (service != NULL && *service == NULL)) { | |
249 | if (hostname != NULL) { | |
250 | OPENSSL_free(*hostname); | |
251 | *hostname = NULL; | |
252 | } | |
253 | if (service != NULL) { | |
254 | OPENSSL_free(*service); | |
255 | *service = NULL; | |
256 | } | |
257 | BIOerr(BIO_F_ADDR_STRINGS, ERR_R_MALLOC_FAILURE); | |
258 | return 0; | |
259 | } | |
260 | ||
28a0841b RL |
261 | return 1; |
262 | } | |
263 | ||
264 | char *BIO_ADDR_hostname_string(const BIO_ADDR *ap, int numeric) | |
265 | { | |
266 | char *hostname = NULL; | |
267 | ||
268 | if (addr_strings(ap, numeric, &hostname, NULL)) | |
269 | return hostname; | |
270 | ||
271 | return NULL; | |
272 | } | |
273 | ||
274 | char *BIO_ADDR_service_string(const BIO_ADDR *ap, int numeric) | |
275 | { | |
276 | char *service = NULL; | |
277 | ||
278 | if (addr_strings(ap, numeric, NULL, &service)) | |
279 | return service; | |
280 | ||
281 | return NULL; | |
282 | } | |
283 | ||
284 | char *BIO_ADDR_path_string(const BIO_ADDR *ap) | |
285 | { | |
286 | #ifdef AF_UNIX | |
287 | if (ap->sa.sa_family == AF_UNIX) | |
29620124 | 288 | return OPENSSL_strdup(ap->s_un.sun_path); |
28a0841b RL |
289 | #endif |
290 | return NULL; | |
291 | } | |
292 | ||
293 | /* | |
294 | * BIO_ADDR_sockaddr - non-public routine to return the struct sockaddr | |
295 | * for a given BIO_ADDR. In reality, this is simply a type safe cast. | |
296 | * The returned struct sockaddr is const, so it can't be tampered with. | |
297 | */ | |
298 | const struct sockaddr *BIO_ADDR_sockaddr(const BIO_ADDR *ap) | |
299 | { | |
300 | return &(ap->sa); | |
301 | } | |
302 | ||
303 | /* | |
304 | * BIO_ADDR_sockaddr_noconst - non-public function that does the same | |
305 | * as BIO_ADDR_sockaddr, but returns a non-const. USE WITH CARE, as | |
306 | * it allows you to tamper with the data (and thereby the contents | |
307 | * of the input BIO_ADDR). | |
308 | */ | |
309 | struct sockaddr *BIO_ADDR_sockaddr_noconst(BIO_ADDR *ap) | |
310 | { | |
311 | return &(ap->sa); | |
312 | } | |
313 | ||
314 | /* | |
315 | * BIO_ADDR_sockaddr_size - non-public function that returns the size | |
316 | * of the struct sockaddr the BIO_ADDR is using. If the protocol family | |
317 | * isn't set or is something other than AF_INET, AF_INET6 or AF_UNIX, | |
318 | * the size of the BIO_ADDR type is returned. | |
319 | */ | |
320 | socklen_t BIO_ADDR_sockaddr_size(const BIO_ADDR *ap) | |
321 | { | |
322 | if (ap->sa.sa_family == AF_INET) | |
29620124 | 323 | return sizeof(ap->s_in); |
28a0841b RL |
324 | #ifdef AF_INET6 |
325 | if (ap->sa.sa_family == AF_INET6) | |
29620124 | 326 | return sizeof(ap->s_in6); |
28a0841b RL |
327 | #endif |
328 | #ifdef AF_UNIX | |
329 | if (ap->sa.sa_family == AF_UNIX) | |
29620124 | 330 | return sizeof(ap->s_un); |
28a0841b RL |
331 | #endif |
332 | return sizeof(*ap); | |
333 | } | |
334 | ||
335 | /********************************************************************** | |
336 | * | |
e5a82bfd | 337 | * Address info database |
28a0841b RL |
338 | * |
339 | */ | |
340 | ||
341 | const BIO_ADDRINFO *BIO_ADDRINFO_next(const BIO_ADDRINFO *bai) | |
342 | { | |
343 | if (bai != NULL) | |
344 | return bai->bai_next; | |
345 | return NULL; | |
346 | } | |
347 | ||
348 | int BIO_ADDRINFO_family(const BIO_ADDRINFO *bai) | |
349 | { | |
350 | if (bai != NULL) | |
351 | return bai->bai_family; | |
352 | return 0; | |
353 | } | |
354 | ||
355 | int BIO_ADDRINFO_socktype(const BIO_ADDRINFO *bai) | |
356 | { | |
357 | if (bai != NULL) | |
358 | return bai->bai_socktype; | |
359 | return 0; | |
360 | } | |
361 | ||
362 | int BIO_ADDRINFO_protocol(const BIO_ADDRINFO *bai) | |
363 | { | |
c72fb77f RL |
364 | if (bai != NULL) { |
365 | if (bai->bai_protocol != 0) | |
366 | return bai->bai_protocol; | |
367 | ||
368 | #ifdef AF_UNIX | |
369 | if (bai->bai_family == AF_UNIX) | |
370 | return 0; | |
371 | #endif | |
372 | ||
373 | switch (bai->bai_socktype) { | |
374 | case SOCK_STREAM: | |
375 | return IPPROTO_TCP; | |
376 | case SOCK_DGRAM: | |
377 | return IPPROTO_UDP; | |
378 | default: | |
379 | break; | |
380 | } | |
381 | } | |
28a0841b RL |
382 | return 0; |
383 | } | |
384 | ||
385 | /* | |
386 | * BIO_ADDRINFO_sockaddr_size - non-public function that returns the size | |
387 | * of the struct sockaddr inside the BIO_ADDRINFO. | |
388 | */ | |
389 | socklen_t BIO_ADDRINFO_sockaddr_size(const BIO_ADDRINFO *bai) | |
390 | { | |
391 | if (bai != NULL) | |
392 | return bai->bai_addrlen; | |
393 | return 0; | |
394 | } | |
395 | ||
396 | /* | |
397 | * BIO_ADDRINFO_sockaddr - non-public function that returns bai_addr | |
398 | * as the struct sockaddr it is. | |
399 | */ | |
400 | const struct sockaddr *BIO_ADDRINFO_sockaddr(const BIO_ADDRINFO *bai) | |
401 | { | |
402 | if (bai != NULL) | |
403 | return bai->bai_addr; | |
404 | return NULL; | |
405 | } | |
406 | ||
407 | const BIO_ADDR *BIO_ADDRINFO_address(const BIO_ADDRINFO *bai) | |
408 | { | |
409 | if (bai != NULL) | |
410 | return (BIO_ADDR *)bai->bai_addr; | |
411 | return NULL; | |
412 | } | |
413 | ||
414 | void BIO_ADDRINFO_free(BIO_ADDRINFO *bai) | |
415 | { | |
416 | if (bai == NULL) | |
417 | return; | |
418 | ||
419 | #ifdef AI_PASSIVE | |
420 | # ifdef AF_UNIX | |
421 | # define _cond bai->bai_family != AF_UNIX | |
422 | # else | |
423 | # define _cond 1 | |
424 | # endif | |
425 | if (_cond) { | |
426 | freeaddrinfo(bai); | |
427 | return; | |
428 | } | |
429 | #endif | |
430 | ||
431 | /* Free manually when we know that addrinfo_wrap() was used. | |
432 | * See further comment above addrinfo_wrap() | |
433 | */ | |
434 | while (bai != NULL) { | |
435 | BIO_ADDRINFO *next = bai->bai_next; | |
436 | OPENSSL_free(bai->bai_addr); | |
437 | OPENSSL_free(bai); | |
438 | bai = next; | |
439 | } | |
440 | } | |
441 | ||
442 | /********************************************************************** | |
443 | * | |
444 | * Service functions | |
445 | * | |
446 | */ | |
447 | ||
448 | /*- | |
449 | * The specs in hostserv can take these forms: | |
450 | * | |
451 | * host:service => *host = "host", *service = "service" | |
452 | * host:* => *host = "host", *service = NULL | |
453 | * host: => *host = "host", *service = NULL | |
454 | * :service => *host = NULL, *service = "service" | |
455 | * *:service => *host = NULL, *service = "service" | |
456 | * | |
457 | * in case no : is present in the string, the result depends on | |
458 | * hostserv_prio, as follows: | |
459 | * | |
460 | * when hostserv_prio == BIO_PARSE_PRIO_HOST | |
461 | * host => *host = "host", *service untouched | |
462 | * | |
463 | * when hostserv_prio == BIO_PARSE_PRIO_SERV | |
464 | * service => *host untouched, *service = "service" | |
465 | * | |
466 | */ | |
467 | int BIO_parse_hostserv(const char *hostserv, char **host, char **service, | |
468 | enum BIO_hostserv_priorities hostserv_prio) | |
469 | { | |
470 | const char *h = NULL; size_t hl = 0; | |
471 | const char *p = NULL; size_t pl = 0; | |
472 | ||
473 | if (*hostserv == '[') { | |
474 | if ((p = strchr(hostserv, ']')) == NULL) | |
475 | goto spec_err; | |
476 | h = hostserv + 1; | |
477 | hl = p - h; | |
478 | p++; | |
479 | if (*p == '\0') | |
480 | p = NULL; | |
481 | else if (*p != ':') | |
482 | goto spec_err; | |
483 | else { | |
484 | p++; | |
485 | pl = strlen(p); | |
486 | } | |
487 | } else { | |
488 | const char *p2 = strrchr(hostserv, ':'); | |
489 | p = strchr(hostserv, ':'); | |
490 | ||
491 | /*- | |
492 | * Check for more than one colon. There are three possible | |
493 | * interpretations: | |
494 | * 1. IPv6 address with port number, last colon being separator. | |
495 | * 2. IPv6 address only. | |
496 | * 3. IPv6 address only if hostserv_prio == BIO_PARSE_PRIO_HOST, | |
497 | * IPv6 address and port number if hostserv_prio == BIO_PARSE_PRIO_SERV | |
498 | * Because of this ambiguity, we currently choose to make it an | |
499 | * error. | |
500 | */ | |
501 | if (p != p2) | |
502 | goto amb_err; | |
503 | ||
504 | if (p != NULL) { | |
505 | h = hostserv; | |
506 | hl = p - h; | |
507 | p++; | |
508 | pl = strlen(p); | |
509 | } else if (hostserv_prio == BIO_PARSE_PRIO_HOST) { | |
510 | h = hostserv; | |
511 | hl = strlen(h); | |
512 | } else { | |
513 | p = hostserv; | |
514 | pl = strlen(p); | |
515 | } | |
516 | } | |
517 | ||
80926502 | 518 | if (p != NULL && strchr(p, ':')) |
28a0841b RL |
519 | goto spec_err; |
520 | ||
521 | if (h != NULL && host != NULL) { | |
522 | if (hl == 0 | |
523 | || (hl == 1 && h[0] == '*')) { | |
524 | *host = NULL; | |
525 | } else { | |
526 | *host = OPENSSL_strndup(h, hl); | |
527 | if (*host == NULL) | |
528 | goto memerr; | |
529 | } | |
530 | } | |
531 | if (p != NULL && service != NULL) { | |
532 | if (pl == 0 | |
533 | || (pl == 1 && p[0] == '*')) { | |
534 | *service = NULL; | |
535 | } else { | |
536 | *service = OPENSSL_strndup(p, pl); | |
537 | if (*service == NULL) | |
538 | goto memerr; | |
539 | } | |
540 | } | |
541 | ||
542 | return 1; | |
543 | amb_err: | |
544 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_AMBIGUOUS_HOST_OR_SERVICE); | |
545 | return 0; | |
546 | spec_err: | |
547 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_MALFORMED_HOST_OR_SERVICE); | |
548 | return 0; | |
549 | memerr: | |
550 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, ERR_R_MALLOC_FAILURE); | |
551 | return 0; | |
552 | } | |
553 | ||
554 | /* addrinfo_wrap is used to build our own addrinfo "chain". | |
555 | * (it has only one entry, so calling it a chain may be a stretch) | |
556 | * It should ONLY be called when getaddrinfo() and friends | |
557 | * aren't available, OR when dealing with a non IP protocol | |
558 | * family, such as AF_UNIX | |
559 | * | |
560 | * the return value is 1 on success, or 0 on failure, which | |
8483a003 | 561 | * only happens if a memory allocation error occurred. |
28a0841b RL |
562 | */ |
563 | static int addrinfo_wrap(int family, int socktype, | |
564 | const void *where, size_t wherelen, | |
565 | unsigned short port, | |
566 | BIO_ADDRINFO **bai) | |
567 | { | |
43ecb9c3 | 568 | *bai = OPENSSL_zalloc(sizeof(**bai)); |
28a0841b RL |
569 | if (*bai == NULL) |
570 | return 0; | |
43ecb9c3 | 571 | |
28a0841b RL |
572 | (*bai)->bai_family = family; |
573 | (*bai)->bai_socktype = socktype; | |
574 | if (socktype == SOCK_STREAM) | |
575 | (*bai)->bai_protocol = IPPROTO_TCP; | |
576 | if (socktype == SOCK_DGRAM) | |
577 | (*bai)->bai_protocol = IPPROTO_UDP; | |
578 | #ifdef AF_UNIX | |
579 | if (family == AF_UNIX) | |
580 | (*bai)->bai_protocol = 0; | |
581 | #endif | |
582 | { | |
583 | /* Magic: We know that BIO_ADDR_sockaddr_noconst is really | |
584 | just an advanced cast of BIO_ADDR* to struct sockaddr * | |
585 | by the power of union, so while it may seem that we're | |
586 | creating a memory leak here, we are not. It will be | |
587 | all right. */ | |
588 | BIO_ADDR *addr = BIO_ADDR_new(); | |
589 | if (addr != NULL) { | |
590 | BIO_ADDR_rawmake(addr, family, where, wherelen, port); | |
591 | (*bai)->bai_addr = BIO_ADDR_sockaddr_noconst(addr); | |
592 | } | |
593 | } | |
594 | (*bai)->bai_next = NULL; | |
595 | if ((*bai)->bai_addr == NULL) { | |
596 | BIO_ADDRINFO_free(*bai); | |
597 | *bai = NULL; | |
598 | return 0; | |
599 | } | |
600 | return 1; | |
601 | } | |
602 | ||
c2e4e5d2 | 603 | DEFINE_RUN_ONCE_STATIC(do_bio_lookup_init) |
f989cd8c | 604 | { |
135648bc | 605 | OPENSSL_init_crypto(0, NULL); |
63ab5ea1 | 606 | bio_lookup_lock = CRYPTO_THREAD_lock_new(); |
5a7ad1f0 | 607 | return bio_lookup_lock != NULL; |
f989cd8c AG |
608 | } |
609 | ||
5114d822 MC |
610 | int BIO_lookup(const char *host, const char *service, |
611 | enum BIO_lookup_type lookup_type, | |
612 | int family, int socktype, BIO_ADDRINFO **res) | |
613 | { | |
614 | return BIO_lookup_ex(host, service, lookup_type, family, socktype, 0, res); | |
615 | } | |
616 | ||
28a0841b | 617 | /*- |
561f6f1e | 618 | * BIO_lookup_ex - look up the node and service you want to connect to. |
28a0841b RL |
619 | * @node: the node you want to connect to. |
620 | * @service: the service you want to connect to. | |
621 | * @lookup_type: declare intent with the result, client or server. | |
622 | * @family: the address family you want to use. Use AF_UNSPEC for any, or | |
623 | * AF_INET, AF_INET6 or AF_UNIX. | |
624 | * @socktype: The socket type you want to use. Can be SOCK_STREAM, SOCK_DGRAM | |
625 | * or 0 for all. | |
5114d822 MC |
626 | * @protocol: The protocol to use, e.g. IPPROTO_TCP or IPPROTO_UDP or 0 for all. |
627 | * Note that some platforms may not return IPPROTO_SCTP without | |
628 | * explicitly requesting it (i.e. IPPROTO_SCTP may not be returned | |
629 | * with 0 for the protocol) | |
28a0841b RL |
630 | * @res: Storage place for the resulting list of returned addresses |
631 | * | |
632 | * This will do a lookup of the node and service that you want to connect to. | |
633 | * It returns a linked list of different addresses you can try to connect to. | |
634 | * | |
635 | * When no longer needed you should call BIO_ADDRINFO_free() to free the result. | |
636 | * | |
637 | * The return value is 1 on success or 0 in case of error. | |
638 | */ | |
e8291428 | 639 | int BIO_lookup_ex(const char *host, const char *service, int lookup_type, |
5114d822 | 640 | int family, int socktype, int protocol, BIO_ADDRINFO **res) |
28a0841b RL |
641 | { |
642 | int ret = 0; /* Assume failure */ | |
643 | ||
644 | switch(family) { | |
645 | case AF_INET: | |
646 | #ifdef AF_INET6 | |
647 | case AF_INET6: | |
648 | #endif | |
649 | #ifdef AF_UNIX | |
650 | case AF_UNIX: | |
651 | #endif | |
652 | #ifdef AF_UNSPEC | |
653 | case AF_UNSPEC: | |
654 | #endif | |
655 | break; | |
656 | default: | |
5114d822 | 657 | BIOerr(BIO_F_BIO_LOOKUP_EX, BIO_R_UNSUPPORTED_PROTOCOL_FAMILY); |
28a0841b RL |
658 | return 0; |
659 | } | |
660 | ||
661 | #ifdef AF_UNIX | |
662 | if (family == AF_UNIX) { | |
663 | if (addrinfo_wrap(family, socktype, host, strlen(host), 0, res)) | |
664 | return 1; | |
665 | else | |
5114d822 | 666 | BIOerr(BIO_F_BIO_LOOKUP_EX, ERR_R_MALLOC_FAILURE); |
28a0841b RL |
667 | return 0; |
668 | } | |
669 | #endif | |
670 | ||
ed03c461 RL |
671 | if (BIO_sock_init() != 1) |
672 | return 0; | |
673 | ||
28a0841b RL |
674 | if (1) { |
675 | #ifdef AI_PASSIVE | |
3e49ee23 | 676 | int gai_ret = 0; |
28a0841b | 677 | struct addrinfo hints; |
3e49ee23 | 678 | |
cbe29648 | 679 | memset(&hints, 0, sizeof(hints)); |
28a0841b | 680 | |
28a0841b RL |
681 | hints.ai_family = family; |
682 | hints.ai_socktype = socktype; | |
5114d822 | 683 | hints.ai_protocol = protocol; |
28a0841b RL |
684 | |
685 | if (lookup_type == BIO_LOOKUP_SERVER) | |
686 | hints.ai_flags |= AI_PASSIVE; | |
687 | ||
688 | /* Note that |res| SHOULD be a 'struct addrinfo **' thanks to | |
689 | * macro magic in bio_lcl.h | |
690 | */ | |
ed03c461 | 691 | switch ((gai_ret = getaddrinfo(host, service, &hints, res))) { |
28a0841b RL |
692 | # ifdef EAI_SYSTEM |
693 | case EAI_SYSTEM: | |
694 | SYSerr(SYS_F_GETADDRINFO, get_last_socket_error()); | |
5114d822 | 695 | BIOerr(BIO_F_BIO_LOOKUP_EX, ERR_R_SYS_LIB); |
28a0841b RL |
696 | break; |
697 | # endif | |
698 | case 0: | |
699 | ret = 1; /* Success */ | |
700 | break; | |
701 | default: | |
5114d822 | 702 | BIOerr(BIO_F_BIO_LOOKUP_EX, ERR_R_SYS_LIB); |
ed03c461 | 703 | ERR_add_error_data(1, gai_strerror(gai_ret)); |
28a0841b RL |
704 | break; |
705 | } | |
706 | } else { | |
707 | #endif | |
37e3daf4 | 708 | const struct hostent *he; |
fcd9c8c0 RL |
709 | /* |
710 | * Because struct hostent is defined for 32-bit pointers only with | |
711 | * VMS C, we need to make sure that '&he_fallback_address' and | |
712 | * '&he_fallback_addresses' are 32-bit pointers | |
713 | */ | |
714 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) | |
715 | # pragma pointer_size save | |
716 | # pragma pointer_size 32 | |
717 | #endif | |
28a0841b RL |
718 | /* Windows doesn't seem to have in_addr_t */ |
719 | #ifdef OPENSSL_SYS_WINDOWS | |
37e3daf4 | 720 | static uint32_t he_fallback_address; |
7fb4b92c MC |
721 | static const char *he_fallback_addresses[] = |
722 | { (char *)&he_fallback_address, NULL }; | |
28a0841b | 723 | #else |
37e3daf4 | 724 | static in_addr_t he_fallback_address; |
7fb4b92c MC |
725 | static const char *he_fallback_addresses[] = |
726 | { (char *)&he_fallback_address, NULL }; | |
28a0841b | 727 | #endif |
37e3daf4 KR |
728 | static const struct hostent he_fallback = |
729 | { NULL, NULL, AF_INET, sizeof(he_fallback_address), | |
730 | (char **)&he_fallback_addresses }; | |
fcd9c8c0 RL |
731 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) |
732 | # pragma pointer_size restore | |
733 | #endif | |
734 | ||
28a0841b | 735 | struct servent *se; |
8483a003 | 736 | /* Apparently, on WIN64, s_proto and s_port have traded places... */ |
28a0841b RL |
737 | #ifdef _WIN64 |
738 | struct servent se_fallback = { NULL, NULL, NULL, 0 }; | |
739 | #else | |
740 | struct servent se_fallback = { NULL, NULL, 0, NULL }; | |
741 | #endif | |
28a0841b | 742 | |
c2e4e5d2 | 743 | if (!RUN_ONCE(&bio_lookup_init, do_bio_lookup_init)) { |
5114d822 | 744 | BIOerr(BIO_F_BIO_LOOKUP_EX, ERR_R_MALLOC_FAILURE); |
c2e4e5d2 RL |
745 | ret = 0; |
746 | goto err; | |
747 | } | |
f989cd8c AG |
748 | |
749 | CRYPTO_THREAD_write_lock(bio_lookup_lock); | |
37e3daf4 | 750 | he_fallback_address = INADDR_ANY; |
28a0841b RL |
751 | if (host == NULL) { |
752 | he = &he_fallback; | |
753 | switch(lookup_type) { | |
754 | case BIO_LOOKUP_CLIENT: | |
755 | he_fallback_address = INADDR_LOOPBACK; | |
756 | break; | |
757 | case BIO_LOOKUP_SERVER: | |
758 | he_fallback_address = INADDR_ANY; | |
759 | break; | |
760 | default: | |
86f31dd9 MC |
761 | /* We forgot to handle a lookup type! */ |
762 | assert("We forgot to handle a lookup type!" == NULL); | |
763 | BIOerr(BIO_F_BIO_LOOKUP_EX, ERR_R_INTERNAL_ERROR); | |
764 | ret = 0; | |
765 | goto err; | |
28a0841b RL |
766 | } |
767 | } else { | |
768 | he = gethostbyname(host); | |
769 | ||
770 | if (he == NULL) { | |
c86d1f19 | 771 | #ifndef OPENSSL_SYS_WINDOWS |
3e49ee23 AP |
772 | /* |
773 | * This might be misleading, because h_errno is used as if | |
774 | * it was errno. To minimize mixup add 1000. Underlying | |
775 | * reason for this is that hstrerror is declared obsolete, | |
776 | * not to mention that a) h_errno is not always guaranteed | |
69687aa8 | 777 | * to be meaningless; b) hstrerror can reside in yet another |
3e49ee23 AP |
778 | * library, linking for sake of hstrerror is an overkill; |
779 | * c) this path is not executed on contemporary systems | |
780 | * anyway [above getaddrinfo/gai_strerror is]. We just let | |
781 | * system administrator figure this out... | |
782 | */ | |
783 | SYSerr(SYS_F_GETHOSTBYNAME, 1000 + h_errno); | |
c86d1f19 KR |
784 | #else |
785 | SYSerr(SYS_F_GETHOSTBYNAME, WSAGetLastError()); | |
786 | #endif | |
28a0841b RL |
787 | ret = 0; |
788 | goto err; | |
789 | } | |
790 | } | |
791 | ||
792 | if (service == NULL) { | |
793 | se_fallback.s_port = 0; | |
622c7e99 | 794 | se_fallback.s_proto = NULL; |
28a0841b RL |
795 | se = &se_fallback; |
796 | } else { | |
797 | char *endp = NULL; | |
798 | long portnum = strtol(service, &endp, 10); | |
fcd9c8c0 RL |
799 | |
800 | /* | |
801 | * Because struct servent is defined for 32-bit pointers only with | |
802 | * VMS C, we need to make sure that 'proto' is a 32-bit pointer. | |
803 | */ | |
804 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) | |
805 | # pragma pointer_size save | |
806 | # pragma pointer_size 32 | |
807 | #endif | |
622c7e99 | 808 | char *proto = NULL; |
fcd9c8c0 RL |
809 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) |
810 | # pragma pointer_size restore | |
811 | #endif | |
622c7e99 RL |
812 | |
813 | switch (socktype) { | |
814 | case SOCK_STREAM: | |
815 | proto = "tcp"; | |
816 | break; | |
817 | case SOCK_DGRAM: | |
818 | proto = "udp"; | |
819 | break; | |
820 | } | |
28a0841b RL |
821 | |
822 | if (endp != service && *endp == '\0' | |
823 | && portnum > 0 && portnum < 65536) { | |
3a63c0ed | 824 | se_fallback.s_port = htons((unsigned short)portnum); |
28a0841b RL |
825 | se_fallback.s_proto = proto; |
826 | se = &se_fallback; | |
827 | } else if (endp == service) { | |
28a0841b RL |
828 | se = getservbyname(service, proto); |
829 | ||
830 | if (se == NULL) { | |
c86d1f19 | 831 | #ifndef OPENSSL_SYS_WINDOWS |
3e49ee23 | 832 | SYSerr(SYS_F_GETSERVBYNAME, errno); |
c86d1f19 KR |
833 | #else |
834 | SYSerr(SYS_F_GETSERVBYNAME, WSAGetLastError()); | |
835 | #endif | |
28a0841b RL |
836 | goto err; |
837 | } | |
838 | } else { | |
5114d822 | 839 | BIOerr(BIO_F_BIO_LOOKUP_EX, BIO_R_MALFORMED_HOST_OR_SERVICE); |
28a0841b RL |
840 | goto err; |
841 | } | |
842 | } | |
843 | ||
844 | *res = NULL; | |
845 | ||
846 | { | |
fcd9c8c0 RL |
847 | /* |
848 | * Because hostent::h_addr_list is an array of 32-bit pointers with VMS C, | |
849 | * we must make sure our iterator designates the same element type, hence | |
850 | * the pointer size dance. | |
851 | */ | |
852 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) | |
853 | # pragma pointer_size save | |
854 | # pragma pointer_size 32 | |
855 | #endif | |
28a0841b | 856 | char **addrlistp; |
fcd9c8c0 RL |
857 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) |
858 | # pragma pointer_size restore | |
859 | #endif | |
28a0841b RL |
860 | size_t addresses; |
861 | BIO_ADDRINFO *tmp_bai = NULL; | |
862 | ||
863 | /* The easiest way to create a linked list from an | |
864 | array is to start from the back */ | |
865 | for(addrlistp = he->h_addr_list; *addrlistp != NULL; | |
866 | addrlistp++) | |
867 | ; | |
868 | ||
869 | for(addresses = addrlistp - he->h_addr_list; | |
870 | addrlistp--, addresses-- > 0; ) { | |
871 | if (!addrinfo_wrap(he->h_addrtype, socktype, | |
872 | *addrlistp, he->h_length, | |
873 | se->s_port, &tmp_bai)) | |
874 | goto addrinfo_malloc_err; | |
875 | tmp_bai->bai_next = *res; | |
876 | *res = tmp_bai; | |
877 | continue; | |
878 | addrinfo_malloc_err: | |
879 | BIO_ADDRINFO_free(*res); | |
880 | *res = NULL; | |
5114d822 | 881 | BIOerr(BIO_F_BIO_LOOKUP_EX, ERR_R_MALLOC_FAILURE); |
28a0841b RL |
882 | ret = 0; |
883 | goto err; | |
884 | } | |
885 | ||
886 | ret = 1; | |
887 | } | |
888 | err: | |
f989cd8c | 889 | CRYPTO_THREAD_unlock(bio_lookup_lock); |
28a0841b RL |
890 | } |
891 | ||
892 | return ret; | |
893 | } | |
ff234405 | 894 | |
1288f26f | 895 | #endif /* OPENSSL_NO_SOCK */ |