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b1322259 RS |
1 | /* |
2 | * Copyright 2016 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 | ||
10 | #include <string.h> | |
11 | ||
12 | #include "bio_lcl.h" | |
5c4328f0 | 13 | #include <openssl/crypto.h> |
28a0841b | 14 | |
1288f26f | 15 | #ifndef OPENSSL_NO_SOCK |
28a0841b RL |
16 | #include <openssl/err.h> |
17 | #include <openssl/buffer.h> | |
d40cf9bc | 18 | #include <ctype.h> |
28a0841b | 19 | |
ff234405 | 20 | CRYPTO_RWLOCK *bio_lookup_lock; |
f989cd8c AG |
21 | static CRYPTO_ONCE bio_lookup_init = CRYPTO_ONCE_STATIC_INIT; |
22 | ||
28a0841b RL |
23 | /* |
24 | * Throughout this file and bio_lcl.h, the existence of the macro | |
25 | * AI_PASSIVE is used to detect the availability of struct addrinfo, | |
26 | * getnameinfo() and getaddrinfo(). If that macro doesn't exist, | |
27 | * we use our own implementation instead, using gethostbyname, | |
28 | * getservbyname and a few other. | |
29 | */ | |
30 | ||
31 | /********************************************************************** | |
32 | * | |
33 | * Address structure | |
34 | * | |
35 | */ | |
36 | ||
37 | BIO_ADDR *BIO_ADDR_new(void) | |
38 | { | |
43ecb9c3 RS |
39 | BIO_ADDR *ret = OPENSSL_zalloc(sizeof(*ret)); |
40 | ||
cb1d435c MRA |
41 | if (ret == NULL) { |
42 | BIOerr(BIO_F_BIO_ADDR_NEW, ERR_R_MALLOC_FAILURE); | |
138388fe | 43 | return NULL; |
cb1d435c | 44 | } |
138388fe | 45 | |
7d1d48a2 | 46 | ret->sa.sa_family = AF_UNSPEC; |
28a0841b RL |
47 | return ret; |
48 | } | |
49 | ||
50 | void BIO_ADDR_free(BIO_ADDR *ap) | |
51 | { | |
52 | OPENSSL_free(ap); | |
53 | } | |
54 | ||
7d1d48a2 MC |
55 | void BIO_ADDR_clear(BIO_ADDR *ap) |
56 | { | |
57 | memset(ap, 0, sizeof(*ap)); | |
58 | ap->sa.sa_family = AF_UNSPEC; | |
59 | } | |
60 | ||
28a0841b RL |
61 | /* |
62 | * BIO_ADDR_make - non-public routine to fill a BIO_ADDR with the contents | |
63 | * of a struct sockaddr. | |
64 | */ | |
65 | int BIO_ADDR_make(BIO_ADDR *ap, const struct sockaddr *sa) | |
66 | { | |
67 | if (sa->sa_family == AF_INET) { | |
29620124 | 68 | ap->s_in = *(const struct sockaddr_in *)sa; |
28a0841b RL |
69 | return 1; |
70 | } | |
71 | #ifdef AF_INET6 | |
72 | if (sa->sa_family == AF_INET6) { | |
29620124 | 73 | ap->s_in6 = *(const struct sockaddr_in6 *)sa; |
28a0841b RL |
74 | return 1; |
75 | } | |
76 | #endif | |
77 | #ifdef AF_UNIX | |
78 | if (ap->sa.sa_family == AF_UNIX) { | |
29620124 | 79 | ap->s_un = *(const struct sockaddr_un *)sa; |
28a0841b RL |
80 | return 1; |
81 | } | |
82 | #endif | |
83 | ||
84 | return 0; | |
85 | } | |
86 | ||
87 | int BIO_ADDR_rawmake(BIO_ADDR *ap, int family, | |
88 | const void *where, size_t wherelen, | |
89 | unsigned short port) | |
90 | { | |
91 | #ifdef AF_UNIX | |
92 | if (family == AF_UNIX) { | |
29620124 | 93 | if (wherelen + 1 > sizeof(ap->s_un.sun_path)) |
28a0841b | 94 | return 0; |
29620124 RL |
95 | memset(&ap->s_un, 0, sizeof(ap->s_un)); |
96 | ap->s_un.sun_family = family; | |
97 | strncpy(ap->s_un.sun_path, where, sizeof(ap->s_un.sun_path) - 1); | |
28a0841b RL |
98 | return 1; |
99 | } | |
100 | #endif | |
101 | if (family == AF_INET) { | |
102 | if (wherelen != sizeof(struct in_addr)) | |
103 | return 0; | |
29620124 RL |
104 | memset(&ap->s_in, 0, sizeof(ap->s_in)); |
105 | ap->s_in.sin_family = family; | |
106 | ap->s_in.sin_port = port; | |
107 | ap->s_in.sin_addr = *(struct in_addr *)where; | |
28a0841b RL |
108 | return 1; |
109 | } | |
110 | #ifdef AF_INET6 | |
111 | if (family == AF_INET6) { | |
112 | if (wherelen != sizeof(struct in6_addr)) | |
113 | return 0; | |
29620124 RL |
114 | memset(&ap->s_in6, 0, sizeof(ap->s_in6)); |
115 | ap->s_in6.sin6_family = family; | |
116 | ap->s_in6.sin6_port = port; | |
117 | ap->s_in6.sin6_addr = *(struct in6_addr *)where; | |
28a0841b RL |
118 | return 1; |
119 | } | |
120 | #endif | |
121 | ||
122 | return 0; | |
123 | } | |
124 | ||
125 | int BIO_ADDR_family(const BIO_ADDR *ap) | |
126 | { | |
127 | return ap->sa.sa_family; | |
128 | } | |
129 | ||
130 | int BIO_ADDR_rawaddress(const BIO_ADDR *ap, void *p, size_t *l) | |
131 | { | |
132 | size_t len = 0; | |
133 | const void *addrptr = NULL; | |
134 | ||
135 | if (ap->sa.sa_family == AF_INET) { | |
29620124 RL |
136 | len = sizeof(ap->s_in.sin_addr); |
137 | addrptr = &ap->s_in.sin_addr; | |
28a0841b RL |
138 | } |
139 | #ifdef AF_INET6 | |
140 | else if (ap->sa.sa_family == AF_INET6) { | |
29620124 RL |
141 | len = sizeof(ap->s_in6.sin6_addr); |
142 | addrptr = &ap->s_in6.sin6_addr; | |
28a0841b RL |
143 | } |
144 | #endif | |
145 | #ifdef AF_UNIX | |
146 | else if (ap->sa.sa_family == AF_UNIX) { | |
29620124 RL |
147 | len = strlen(ap->s_un.sun_path); |
148 | addrptr = &ap->s_un.sun_path; | |
28a0841b RL |
149 | } |
150 | #endif | |
151 | ||
152 | if (addrptr == NULL) | |
153 | return 0; | |
154 | ||
155 | if (p != NULL) { | |
156 | memcpy(p, addrptr, len); | |
157 | } | |
158 | if (l != NULL) | |
159 | *l = len; | |
160 | ||
161 | return 1; | |
162 | } | |
163 | ||
164 | unsigned short BIO_ADDR_rawport(const BIO_ADDR *ap) | |
165 | { | |
166 | if (ap->sa.sa_family == AF_INET) | |
29620124 | 167 | return ap->s_in.sin_port; |
28a0841b RL |
168 | #ifdef AF_INET6 |
169 | if (ap->sa.sa_family == AF_INET6) | |
29620124 | 170 | return ap->s_in6.sin6_port; |
28a0841b RL |
171 | #endif |
172 | return 0; | |
173 | } | |
174 | ||
175 | /*- | |
176 | * addr_strings - helper function to get host and service names | |
177 | * @ap: the BIO_ADDR that has the input info | |
178 | * @numeric: 0 if actual names should be returned, 1 if the numeric | |
179 | * representation should be returned. | |
180 | * @hostname: a pointer to a pointer to a memory area to store the | |
181 | * host name or numeric representation. Unused if NULL. | |
182 | * @service: a pointer to a pointer to a memory area to store the | |
183 | * service name or numeric representation. Unused if NULL. | |
184 | * | |
185 | * The return value is 0 on failure, with the error code in the error | |
186 | * stack, and 1 on success. | |
187 | */ | |
188 | static int addr_strings(const BIO_ADDR *ap, int numeric, | |
189 | char **hostname, char **service) | |
190 | { | |
ed03c461 RL |
191 | if (BIO_sock_init() != 1) |
192 | return 0; | |
193 | ||
28a0841b RL |
194 | if (1) { |
195 | #ifdef AI_PASSIVE | |
196 | int ret = 0; | |
6faffd0a | 197 | char host[NI_MAXHOST] = "", serv[NI_MAXSERV] = ""; |
28a0841b RL |
198 | int flags = 0; |
199 | ||
200 | if (numeric) | |
201 | flags |= NI_NUMERICHOST | NI_NUMERICSERV; | |
202 | ||
203 | if ((ret = getnameinfo(BIO_ADDR_sockaddr(ap), | |
204 | BIO_ADDR_sockaddr_size(ap), | |
205 | host, sizeof(host), serv, sizeof(serv), | |
206 | flags)) != 0) { | |
207 | # ifdef EAI_SYSTEM | |
208 | if (ret == EAI_SYSTEM) { | |
209 | SYSerr(SYS_F_GETNAMEINFO, get_last_socket_error()); | |
210 | BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); | |
211 | } else | |
212 | # endif | |
213 | { | |
214 | BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); | |
215 | ERR_add_error_data(1, gai_strerror(ret)); | |
216 | } | |
217 | return 0; | |
218 | } | |
d40cf9bc | 219 | |
6faffd0a RL |
220 | /* VMS getnameinfo() has a bug, it doesn't fill in serv, which |
221 | * leaves it with whatever garbage that happens to be there. | |
222 | * However, we initialise serv with the empty string (serv[0] | |
223 | * is therefore NUL), so it gets real easy to detect when things | |
224 | * didn't go the way one might expect. | |
d40cf9bc | 225 | */ |
6faffd0a | 226 | if (serv[0] == '\0') { |
d40cf9bc RL |
227 | BIO_snprintf(serv, sizeof(serv), "%d", |
228 | ntohs(BIO_ADDR_rawport(ap))); | |
229 | } | |
230 | ||
28a0841b RL |
231 | if (hostname) |
232 | *hostname = OPENSSL_strdup(host); | |
233 | if (service) | |
234 | *service = OPENSSL_strdup(serv); | |
235 | } else { | |
236 | #endif | |
237 | if (hostname) | |
29620124 | 238 | *hostname = OPENSSL_strdup(inet_ntoa(ap->s_in.sin_addr)); |
28a0841b RL |
239 | if (service) { |
240 | char serv[6]; /* port is 16 bits => max 5 decimal digits */ | |
29620124 | 241 | BIO_snprintf(serv, sizeof(serv), "%d", ntohs(ap->s_in.sin_port)); |
28a0841b RL |
242 | *service = OPENSSL_strdup(serv); |
243 | } | |
244 | } | |
245 | ||
246 | return 1; | |
247 | } | |
248 | ||
249 | char *BIO_ADDR_hostname_string(const BIO_ADDR *ap, int numeric) | |
250 | { | |
251 | char *hostname = NULL; | |
252 | ||
253 | if (addr_strings(ap, numeric, &hostname, NULL)) | |
254 | return hostname; | |
255 | ||
256 | return NULL; | |
257 | } | |
258 | ||
259 | char *BIO_ADDR_service_string(const BIO_ADDR *ap, int numeric) | |
260 | { | |
261 | char *service = NULL; | |
262 | ||
263 | if (addr_strings(ap, numeric, NULL, &service)) | |
264 | return service; | |
265 | ||
266 | return NULL; | |
267 | } | |
268 | ||
269 | char *BIO_ADDR_path_string(const BIO_ADDR *ap) | |
270 | { | |
271 | #ifdef AF_UNIX | |
272 | if (ap->sa.sa_family == AF_UNIX) | |
29620124 | 273 | return OPENSSL_strdup(ap->s_un.sun_path); |
28a0841b RL |
274 | #endif |
275 | return NULL; | |
276 | } | |
277 | ||
278 | /* | |
279 | * BIO_ADDR_sockaddr - non-public routine to return the struct sockaddr | |
280 | * for a given BIO_ADDR. In reality, this is simply a type safe cast. | |
281 | * The returned struct sockaddr is const, so it can't be tampered with. | |
282 | */ | |
283 | const struct sockaddr *BIO_ADDR_sockaddr(const BIO_ADDR *ap) | |
284 | { | |
285 | return &(ap->sa); | |
286 | } | |
287 | ||
288 | /* | |
289 | * BIO_ADDR_sockaddr_noconst - non-public function that does the same | |
290 | * as BIO_ADDR_sockaddr, but returns a non-const. USE WITH CARE, as | |
291 | * it allows you to tamper with the data (and thereby the contents | |
292 | * of the input BIO_ADDR). | |
293 | */ | |
294 | struct sockaddr *BIO_ADDR_sockaddr_noconst(BIO_ADDR *ap) | |
295 | { | |
296 | return &(ap->sa); | |
297 | } | |
298 | ||
299 | /* | |
300 | * BIO_ADDR_sockaddr_size - non-public function that returns the size | |
301 | * of the struct sockaddr the BIO_ADDR is using. If the protocol family | |
302 | * isn't set or is something other than AF_INET, AF_INET6 or AF_UNIX, | |
303 | * the size of the BIO_ADDR type is returned. | |
304 | */ | |
305 | socklen_t BIO_ADDR_sockaddr_size(const BIO_ADDR *ap) | |
306 | { | |
307 | if (ap->sa.sa_family == AF_INET) | |
29620124 | 308 | return sizeof(ap->s_in); |
28a0841b RL |
309 | #ifdef AF_INET6 |
310 | if (ap->sa.sa_family == AF_INET6) | |
29620124 | 311 | return sizeof(ap->s_in6); |
28a0841b RL |
312 | #endif |
313 | #ifdef AF_UNIX | |
314 | if (ap->sa.sa_family == AF_UNIX) | |
29620124 | 315 | return sizeof(ap->s_un); |
28a0841b RL |
316 | #endif |
317 | return sizeof(*ap); | |
318 | } | |
319 | ||
320 | /********************************************************************** | |
321 | * | |
e5a82bfd | 322 | * Address info database |
28a0841b RL |
323 | * |
324 | */ | |
325 | ||
326 | const BIO_ADDRINFO *BIO_ADDRINFO_next(const BIO_ADDRINFO *bai) | |
327 | { | |
328 | if (bai != NULL) | |
329 | return bai->bai_next; | |
330 | return NULL; | |
331 | } | |
332 | ||
333 | int BIO_ADDRINFO_family(const BIO_ADDRINFO *bai) | |
334 | { | |
335 | if (bai != NULL) | |
336 | return bai->bai_family; | |
337 | return 0; | |
338 | } | |
339 | ||
340 | int BIO_ADDRINFO_socktype(const BIO_ADDRINFO *bai) | |
341 | { | |
342 | if (bai != NULL) | |
343 | return bai->bai_socktype; | |
344 | return 0; | |
345 | } | |
346 | ||
347 | int BIO_ADDRINFO_protocol(const BIO_ADDRINFO *bai) | |
348 | { | |
c72fb77f RL |
349 | if (bai != NULL) { |
350 | if (bai->bai_protocol != 0) | |
351 | return bai->bai_protocol; | |
352 | ||
353 | #ifdef AF_UNIX | |
354 | if (bai->bai_family == AF_UNIX) | |
355 | return 0; | |
356 | #endif | |
357 | ||
358 | switch (bai->bai_socktype) { | |
359 | case SOCK_STREAM: | |
360 | return IPPROTO_TCP; | |
361 | case SOCK_DGRAM: | |
362 | return IPPROTO_UDP; | |
363 | default: | |
364 | break; | |
365 | } | |
366 | } | |
28a0841b RL |
367 | return 0; |
368 | } | |
369 | ||
370 | /* | |
371 | * BIO_ADDRINFO_sockaddr_size - non-public function that returns the size | |
372 | * of the struct sockaddr inside the BIO_ADDRINFO. | |
373 | */ | |
374 | socklen_t BIO_ADDRINFO_sockaddr_size(const BIO_ADDRINFO *bai) | |
375 | { | |
376 | if (bai != NULL) | |
377 | return bai->bai_addrlen; | |
378 | return 0; | |
379 | } | |
380 | ||
381 | /* | |
382 | * BIO_ADDRINFO_sockaddr - non-public function that returns bai_addr | |
383 | * as the struct sockaddr it is. | |
384 | */ | |
385 | const struct sockaddr *BIO_ADDRINFO_sockaddr(const BIO_ADDRINFO *bai) | |
386 | { | |
387 | if (bai != NULL) | |
388 | return bai->bai_addr; | |
389 | return NULL; | |
390 | } | |
391 | ||
392 | const BIO_ADDR *BIO_ADDRINFO_address(const BIO_ADDRINFO *bai) | |
393 | { | |
394 | if (bai != NULL) | |
395 | return (BIO_ADDR *)bai->bai_addr; | |
396 | return NULL; | |
397 | } | |
398 | ||
399 | void BIO_ADDRINFO_free(BIO_ADDRINFO *bai) | |
400 | { | |
401 | if (bai == NULL) | |
402 | return; | |
403 | ||
404 | #ifdef AI_PASSIVE | |
405 | # ifdef AF_UNIX | |
406 | # define _cond bai->bai_family != AF_UNIX | |
407 | # else | |
408 | # define _cond 1 | |
409 | # endif | |
410 | if (_cond) { | |
411 | freeaddrinfo(bai); | |
412 | return; | |
413 | } | |
414 | #endif | |
415 | ||
416 | /* Free manually when we know that addrinfo_wrap() was used. | |
417 | * See further comment above addrinfo_wrap() | |
418 | */ | |
419 | while (bai != NULL) { | |
420 | BIO_ADDRINFO *next = bai->bai_next; | |
421 | OPENSSL_free(bai->bai_addr); | |
422 | OPENSSL_free(bai); | |
423 | bai = next; | |
424 | } | |
425 | } | |
426 | ||
427 | /********************************************************************** | |
428 | * | |
429 | * Service functions | |
430 | * | |
431 | */ | |
432 | ||
433 | /*- | |
434 | * The specs in hostserv can take these forms: | |
435 | * | |
436 | * host:service => *host = "host", *service = "service" | |
437 | * host:* => *host = "host", *service = NULL | |
438 | * host: => *host = "host", *service = NULL | |
439 | * :service => *host = NULL, *service = "service" | |
440 | * *:service => *host = NULL, *service = "service" | |
441 | * | |
442 | * in case no : is present in the string, the result depends on | |
443 | * hostserv_prio, as follows: | |
444 | * | |
445 | * when hostserv_prio == BIO_PARSE_PRIO_HOST | |
446 | * host => *host = "host", *service untouched | |
447 | * | |
448 | * when hostserv_prio == BIO_PARSE_PRIO_SERV | |
449 | * service => *host untouched, *service = "service" | |
450 | * | |
451 | */ | |
452 | int BIO_parse_hostserv(const char *hostserv, char **host, char **service, | |
453 | enum BIO_hostserv_priorities hostserv_prio) | |
454 | { | |
455 | const char *h = NULL; size_t hl = 0; | |
456 | const char *p = NULL; size_t pl = 0; | |
457 | ||
458 | if (*hostserv == '[') { | |
459 | if ((p = strchr(hostserv, ']')) == NULL) | |
460 | goto spec_err; | |
461 | h = hostserv + 1; | |
462 | hl = p - h; | |
463 | p++; | |
464 | if (*p == '\0') | |
465 | p = NULL; | |
466 | else if (*p != ':') | |
467 | goto spec_err; | |
468 | else { | |
469 | p++; | |
470 | pl = strlen(p); | |
471 | } | |
472 | } else { | |
473 | const char *p2 = strrchr(hostserv, ':'); | |
474 | p = strchr(hostserv, ':'); | |
475 | ||
476 | /*- | |
477 | * Check for more than one colon. There are three possible | |
478 | * interpretations: | |
479 | * 1. IPv6 address with port number, last colon being separator. | |
480 | * 2. IPv6 address only. | |
481 | * 3. IPv6 address only if hostserv_prio == BIO_PARSE_PRIO_HOST, | |
482 | * IPv6 address and port number if hostserv_prio == BIO_PARSE_PRIO_SERV | |
483 | * Because of this ambiguity, we currently choose to make it an | |
484 | * error. | |
485 | */ | |
486 | if (p != p2) | |
487 | goto amb_err; | |
488 | ||
489 | if (p != NULL) { | |
490 | h = hostserv; | |
491 | hl = p - h; | |
492 | p++; | |
493 | pl = strlen(p); | |
494 | } else if (hostserv_prio == BIO_PARSE_PRIO_HOST) { | |
495 | h = hostserv; | |
496 | hl = strlen(h); | |
497 | } else { | |
498 | p = hostserv; | |
499 | pl = strlen(p); | |
500 | } | |
501 | } | |
502 | ||
80926502 | 503 | if (p != NULL && strchr(p, ':')) |
28a0841b RL |
504 | goto spec_err; |
505 | ||
506 | if (h != NULL && host != NULL) { | |
507 | if (hl == 0 | |
508 | || (hl == 1 && h[0] == '*')) { | |
509 | *host = NULL; | |
510 | } else { | |
511 | *host = OPENSSL_strndup(h, hl); | |
512 | if (*host == NULL) | |
513 | goto memerr; | |
514 | } | |
515 | } | |
516 | if (p != NULL && service != NULL) { | |
517 | if (pl == 0 | |
518 | || (pl == 1 && p[0] == '*')) { | |
519 | *service = NULL; | |
520 | } else { | |
521 | *service = OPENSSL_strndup(p, pl); | |
522 | if (*service == NULL) | |
523 | goto memerr; | |
524 | } | |
525 | } | |
526 | ||
527 | return 1; | |
528 | amb_err: | |
529 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_AMBIGUOUS_HOST_OR_SERVICE); | |
530 | return 0; | |
531 | spec_err: | |
532 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_MALFORMED_HOST_OR_SERVICE); | |
533 | return 0; | |
534 | memerr: | |
535 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, ERR_R_MALLOC_FAILURE); | |
536 | return 0; | |
537 | } | |
538 | ||
539 | /* addrinfo_wrap is used to build our own addrinfo "chain". | |
540 | * (it has only one entry, so calling it a chain may be a stretch) | |
541 | * It should ONLY be called when getaddrinfo() and friends | |
542 | * aren't available, OR when dealing with a non IP protocol | |
543 | * family, such as AF_UNIX | |
544 | * | |
545 | * the return value is 1 on success, or 0 on failure, which | |
8483a003 | 546 | * only happens if a memory allocation error occurred. |
28a0841b RL |
547 | */ |
548 | static int addrinfo_wrap(int family, int socktype, | |
549 | const void *where, size_t wherelen, | |
550 | unsigned short port, | |
551 | BIO_ADDRINFO **bai) | |
552 | { | |
553 | OPENSSL_assert(bai != NULL); | |
554 | ||
43ecb9c3 | 555 | *bai = OPENSSL_zalloc(sizeof(**bai)); |
28a0841b RL |
556 | if (*bai == NULL) |
557 | return 0; | |
43ecb9c3 | 558 | |
28a0841b RL |
559 | (*bai)->bai_family = family; |
560 | (*bai)->bai_socktype = socktype; | |
561 | if (socktype == SOCK_STREAM) | |
562 | (*bai)->bai_protocol = IPPROTO_TCP; | |
563 | if (socktype == SOCK_DGRAM) | |
564 | (*bai)->bai_protocol = IPPROTO_UDP; | |
565 | #ifdef AF_UNIX | |
566 | if (family == AF_UNIX) | |
567 | (*bai)->bai_protocol = 0; | |
568 | #endif | |
569 | { | |
570 | /* Magic: We know that BIO_ADDR_sockaddr_noconst is really | |
571 | just an advanced cast of BIO_ADDR* to struct sockaddr * | |
572 | by the power of union, so while it may seem that we're | |
573 | creating a memory leak here, we are not. It will be | |
574 | all right. */ | |
575 | BIO_ADDR *addr = BIO_ADDR_new(); | |
576 | if (addr != NULL) { | |
577 | BIO_ADDR_rawmake(addr, family, where, wherelen, port); | |
578 | (*bai)->bai_addr = BIO_ADDR_sockaddr_noconst(addr); | |
579 | } | |
580 | } | |
581 | (*bai)->bai_next = NULL; | |
582 | if ((*bai)->bai_addr == NULL) { | |
583 | BIO_ADDRINFO_free(*bai); | |
584 | *bai = NULL; | |
585 | return 0; | |
586 | } | |
587 | return 1; | |
588 | } | |
589 | ||
f989cd8c AG |
590 | static void do_bio_lookup_init(void) |
591 | { | |
592 | bio_lookup_lock = CRYPTO_THREAD_lock_new(); | |
593 | } | |
594 | ||
28a0841b RL |
595 | /*- |
596 | * BIO_lookup - look up the node and service you want to connect to. | |
597 | * @node: the node you want to connect to. | |
598 | * @service: the service you want to connect to. | |
599 | * @lookup_type: declare intent with the result, client or server. | |
600 | * @family: the address family you want to use. Use AF_UNSPEC for any, or | |
601 | * AF_INET, AF_INET6 or AF_UNIX. | |
602 | * @socktype: The socket type you want to use. Can be SOCK_STREAM, SOCK_DGRAM | |
603 | * or 0 for all. | |
604 | * @res: Storage place for the resulting list of returned addresses | |
605 | * | |
606 | * This will do a lookup of the node and service that you want to connect to. | |
607 | * It returns a linked list of different addresses you can try to connect to. | |
608 | * | |
609 | * When no longer needed you should call BIO_ADDRINFO_free() to free the result. | |
610 | * | |
611 | * The return value is 1 on success or 0 in case of error. | |
612 | */ | |
613 | int BIO_lookup(const char *host, const char *service, | |
614 | enum BIO_lookup_type lookup_type, | |
615 | int family, int socktype, BIO_ADDRINFO **res) | |
616 | { | |
617 | int ret = 0; /* Assume failure */ | |
618 | ||
619 | switch(family) { | |
620 | case AF_INET: | |
621 | #ifdef AF_INET6 | |
622 | case AF_INET6: | |
623 | #endif | |
624 | #ifdef AF_UNIX | |
625 | case AF_UNIX: | |
626 | #endif | |
627 | #ifdef AF_UNSPEC | |
628 | case AF_UNSPEC: | |
629 | #endif | |
630 | break; | |
631 | default: | |
632 | BIOerr(BIO_F_BIO_LOOKUP, BIO_R_UNSUPPORTED_PROTOCOL_FAMILY); | |
633 | return 0; | |
634 | } | |
635 | ||
636 | #ifdef AF_UNIX | |
637 | if (family == AF_UNIX) { | |
638 | if (addrinfo_wrap(family, socktype, host, strlen(host), 0, res)) | |
639 | return 1; | |
640 | else | |
641 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_MALLOC_FAILURE); | |
642 | return 0; | |
643 | } | |
644 | #endif | |
645 | ||
ed03c461 RL |
646 | if (BIO_sock_init() != 1) |
647 | return 0; | |
648 | ||
28a0841b | 649 | if (1) { |
ed03c461 | 650 | int gai_ret = 0; |
28a0841b RL |
651 | #ifdef AI_PASSIVE |
652 | struct addrinfo hints; | |
f0496ad7 | 653 | memset(&hints, 0, sizeof hints); |
28a0841b | 654 | |
28a0841b RL |
655 | # ifdef AI_ADDRCONFIG |
656 | hints.ai_flags = AI_ADDRCONFIG; | |
657 | # endif | |
658 | hints.ai_family = family; | |
659 | hints.ai_socktype = socktype; | |
28a0841b RL |
660 | |
661 | if (lookup_type == BIO_LOOKUP_SERVER) | |
662 | hints.ai_flags |= AI_PASSIVE; | |
663 | ||
664 | /* Note that |res| SHOULD be a 'struct addrinfo **' thanks to | |
665 | * macro magic in bio_lcl.h | |
666 | */ | |
ed03c461 | 667 | switch ((gai_ret = getaddrinfo(host, service, &hints, res))) { |
28a0841b RL |
668 | # ifdef EAI_SYSTEM |
669 | case EAI_SYSTEM: | |
670 | SYSerr(SYS_F_GETADDRINFO, get_last_socket_error()); | |
671 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); | |
672 | break; | |
673 | # endif | |
674 | case 0: | |
675 | ret = 1; /* Success */ | |
676 | break; | |
677 | default: | |
678 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); | |
ed03c461 | 679 | ERR_add_error_data(1, gai_strerror(gai_ret)); |
28a0841b RL |
680 | break; |
681 | } | |
682 | } else { | |
683 | #endif | |
37e3daf4 | 684 | const struct hostent *he; |
fcd9c8c0 RL |
685 | /* |
686 | * Because struct hostent is defined for 32-bit pointers only with | |
687 | * VMS C, we need to make sure that '&he_fallback_address' and | |
688 | * '&he_fallback_addresses' are 32-bit pointers | |
689 | */ | |
690 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) | |
691 | # pragma pointer_size save | |
692 | # pragma pointer_size 32 | |
693 | #endif | |
28a0841b RL |
694 | /* Windows doesn't seem to have in_addr_t */ |
695 | #ifdef OPENSSL_SYS_WINDOWS | |
37e3daf4 KR |
696 | static uint32_t he_fallback_address; |
697 | static const uint32_t *he_fallback_addresses[] = | |
698 | { &he_fallback_address, NULL }; | |
28a0841b | 699 | #else |
37e3daf4 KR |
700 | static in_addr_t he_fallback_address; |
701 | static const in_addr_t *he_fallback_addresses[] = | |
702 | { &he_fallback_address, NULL }; | |
28a0841b | 703 | #endif |
37e3daf4 KR |
704 | static const struct hostent he_fallback = |
705 | { NULL, NULL, AF_INET, sizeof(he_fallback_address), | |
706 | (char **)&he_fallback_addresses }; | |
fcd9c8c0 RL |
707 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) |
708 | # pragma pointer_size restore | |
709 | #endif | |
710 | ||
28a0841b | 711 | struct servent *se; |
8483a003 | 712 | /* Apparently, on WIN64, s_proto and s_port have traded places... */ |
28a0841b RL |
713 | #ifdef _WIN64 |
714 | struct servent se_fallback = { NULL, NULL, NULL, 0 }; | |
715 | #else | |
716 | struct servent se_fallback = { NULL, NULL, 0, NULL }; | |
717 | #endif | |
28a0841b | 718 | |
f989cd8c AG |
719 | CRYPTO_THREAD_run_once(&bio_lookup_init, do_bio_lookup_init); |
720 | ||
721 | CRYPTO_THREAD_write_lock(bio_lookup_lock); | |
37e3daf4 | 722 | he_fallback_address = INADDR_ANY; |
28a0841b RL |
723 | if (host == NULL) { |
724 | he = &he_fallback; | |
725 | switch(lookup_type) { | |
726 | case BIO_LOOKUP_CLIENT: | |
727 | he_fallback_address = INADDR_LOOPBACK; | |
728 | break; | |
729 | case BIO_LOOKUP_SERVER: | |
730 | he_fallback_address = INADDR_ANY; | |
731 | break; | |
732 | default: | |
733 | OPENSSL_assert(("We forgot to handle a lookup type!" == 0)); | |
734 | break; | |
735 | } | |
736 | } else { | |
737 | he = gethostbyname(host); | |
738 | ||
739 | if (he == NULL) { | |
c86d1f19 | 740 | #ifndef OPENSSL_SYS_WINDOWS |
28a0841b RL |
741 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); |
742 | ERR_add_error_data(1, hstrerror(h_errno)); | |
c86d1f19 KR |
743 | #else |
744 | SYSerr(SYS_F_GETHOSTBYNAME, WSAGetLastError()); | |
745 | #endif | |
28a0841b RL |
746 | ret = 0; |
747 | goto err; | |
748 | } | |
749 | } | |
750 | ||
751 | if (service == NULL) { | |
752 | se_fallback.s_port = 0; | |
622c7e99 | 753 | se_fallback.s_proto = NULL; |
28a0841b RL |
754 | se = &se_fallback; |
755 | } else { | |
756 | char *endp = NULL; | |
757 | long portnum = strtol(service, &endp, 10); | |
fcd9c8c0 RL |
758 | |
759 | /* | |
760 | * Because struct servent is defined for 32-bit pointers only with | |
761 | * VMS C, we need to make sure that 'proto' is a 32-bit pointer. | |
762 | */ | |
763 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) | |
764 | # pragma pointer_size save | |
765 | # pragma pointer_size 32 | |
766 | #endif | |
622c7e99 | 767 | char *proto = NULL; |
fcd9c8c0 RL |
768 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) |
769 | # pragma pointer_size restore | |
770 | #endif | |
622c7e99 RL |
771 | |
772 | switch (socktype) { | |
773 | case SOCK_STREAM: | |
774 | proto = "tcp"; | |
775 | break; | |
776 | case SOCK_DGRAM: | |
777 | proto = "udp"; | |
778 | break; | |
779 | } | |
28a0841b RL |
780 | |
781 | if (endp != service && *endp == '\0' | |
782 | && portnum > 0 && portnum < 65536) { | |
783 | se_fallback.s_port = htons(portnum); | |
784 | se_fallback.s_proto = proto; | |
785 | se = &se_fallback; | |
786 | } else if (endp == service) { | |
28a0841b RL |
787 | se = getservbyname(service, proto); |
788 | ||
789 | if (se == NULL) { | |
c86d1f19 | 790 | #ifndef OPENSSL_SYS_WINDOWS |
28a0841b RL |
791 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); |
792 | ERR_add_error_data(1, hstrerror(h_errno)); | |
c86d1f19 KR |
793 | #else |
794 | SYSerr(SYS_F_GETSERVBYNAME, WSAGetLastError()); | |
795 | #endif | |
28a0841b RL |
796 | goto err; |
797 | } | |
798 | } else { | |
799 | BIOerr(BIO_F_BIO_LOOKUP, BIO_R_MALFORMED_HOST_OR_SERVICE); | |
800 | goto err; | |
801 | } | |
802 | } | |
803 | ||
804 | *res = NULL; | |
805 | ||
806 | { | |
fcd9c8c0 RL |
807 | /* |
808 | * Because hostent::h_addr_list is an array of 32-bit pointers with VMS C, | |
809 | * we must make sure our iterator designates the same element type, hence | |
810 | * the pointer size dance. | |
811 | */ | |
812 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) | |
813 | # pragma pointer_size save | |
814 | # pragma pointer_size 32 | |
815 | #endif | |
28a0841b | 816 | char **addrlistp; |
fcd9c8c0 RL |
817 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) |
818 | # pragma pointer_size restore | |
819 | #endif | |
28a0841b RL |
820 | size_t addresses; |
821 | BIO_ADDRINFO *tmp_bai = NULL; | |
822 | ||
823 | /* The easiest way to create a linked list from an | |
824 | array is to start from the back */ | |
825 | for(addrlistp = he->h_addr_list; *addrlistp != NULL; | |
826 | addrlistp++) | |
827 | ; | |
828 | ||
829 | for(addresses = addrlistp - he->h_addr_list; | |
830 | addrlistp--, addresses-- > 0; ) { | |
831 | if (!addrinfo_wrap(he->h_addrtype, socktype, | |
832 | *addrlistp, he->h_length, | |
833 | se->s_port, &tmp_bai)) | |
834 | goto addrinfo_malloc_err; | |
835 | tmp_bai->bai_next = *res; | |
836 | *res = tmp_bai; | |
837 | continue; | |
838 | addrinfo_malloc_err: | |
839 | BIO_ADDRINFO_free(*res); | |
840 | *res = NULL; | |
841 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_MALLOC_FAILURE); | |
842 | ret = 0; | |
843 | goto err; | |
844 | } | |
845 | ||
846 | ret = 1; | |
847 | } | |
848 | err: | |
f989cd8c | 849 | CRYPTO_THREAD_unlock(bio_lookup_lock); |
28a0841b RL |
850 | } |
851 | ||
852 | return ret; | |
853 | } | |
ff234405 | 854 | |
1288f26f | 855 | #endif /* OPENSSL_NO_SOCK */ |