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28a0841b RL |
1 | /* ==================================================================== |
2 | * Copyright (c) 2015 The OpenSSL Project. All rights reserved. | |
3 | * | |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted provided that the following conditions | |
6 | * are met: | |
7 | * | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * | |
11 | * 2. Redistributions in binary form must reproduce the above copyright | |
12 | * notice, this list of conditions and the following disclaimer in | |
13 | * the documentation and/or other materials provided with the | |
14 | * distribution. | |
15 | * | |
16 | * 3. All advertising materials mentioning features or use of this | |
17 | * software must display the following acknowledgment: | |
18 | * "This product includes software developed by the OpenSSL Project | |
19 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
20 | * | |
21 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
22 | * endorse or promote products derived from this software without | |
23 | * prior written permission. For written permission, please contact | |
24 | * openssl-core@openssl.org. | |
25 | * | |
26 | * 5. Products derived from this software may not be called "OpenSSL" | |
27 | * nor may "OpenSSL" appear in their names without prior written | |
28 | * permission of the OpenSSL Project. | |
29 | * | |
30 | * 6. Redistributions of any form whatsoever must retain the following | |
31 | * acknowledgment: | |
32 | * "This product includes software developed by the OpenSSL Project | |
33 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
34 | * | |
35 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
36 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
37 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
38 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
39 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
40 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
41 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
42 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
43 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
44 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
45 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
46 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
47 | * ==================================================================== | |
48 | * | |
49 | * This product includes cryptographic software written by Eric Young | |
50 | * (eay@cryptsoft.com). This product includes software written by Tim | |
51 | * Hudson (tjh@cryptsoft.com). | |
52 | * | |
53 | */ | |
54 | ||
55 | #include <string.h> | |
56 | ||
57 | #include "bio_lcl.h" | |
f989cd8c | 58 | #include "internal/threads.h" |
28a0841b | 59 | |
1288f26f | 60 | #ifndef OPENSSL_NO_SOCK |
28a0841b RL |
61 | #include <openssl/err.h> |
62 | #include <openssl/buffer.h> | |
d40cf9bc | 63 | #include <ctype.h> |
28a0841b | 64 | |
f989cd8c AG |
65 | static CRYPTO_RWLOCK *bio_lookup_lock; |
66 | static CRYPTO_ONCE bio_lookup_init = CRYPTO_ONCE_STATIC_INIT; | |
67 | ||
28a0841b RL |
68 | /* |
69 | * Throughout this file and bio_lcl.h, the existence of the macro | |
70 | * AI_PASSIVE is used to detect the availability of struct addrinfo, | |
71 | * getnameinfo() and getaddrinfo(). If that macro doesn't exist, | |
72 | * we use our own implementation instead, using gethostbyname, | |
73 | * getservbyname and a few other. | |
74 | */ | |
75 | ||
76 | /********************************************************************** | |
77 | * | |
78 | * Address structure | |
79 | * | |
80 | */ | |
81 | ||
82 | BIO_ADDR *BIO_ADDR_new(void) | |
83 | { | |
43ecb9c3 RS |
84 | BIO_ADDR *ret = OPENSSL_zalloc(sizeof(*ret)); |
85 | ||
7d1d48a2 | 86 | ret->sa.sa_family = AF_UNSPEC; |
28a0841b RL |
87 | return ret; |
88 | } | |
89 | ||
90 | void BIO_ADDR_free(BIO_ADDR *ap) | |
91 | { | |
92 | OPENSSL_free(ap); | |
93 | } | |
94 | ||
7d1d48a2 MC |
95 | void BIO_ADDR_clear(BIO_ADDR *ap) |
96 | { | |
97 | memset(ap, 0, sizeof(*ap)); | |
98 | ap->sa.sa_family = AF_UNSPEC; | |
99 | } | |
100 | ||
28a0841b RL |
101 | /* |
102 | * BIO_ADDR_make - non-public routine to fill a BIO_ADDR with the contents | |
103 | * of a struct sockaddr. | |
104 | */ | |
105 | int BIO_ADDR_make(BIO_ADDR *ap, const struct sockaddr *sa) | |
106 | { | |
107 | if (sa->sa_family == AF_INET) { | |
29620124 | 108 | ap->s_in = *(const struct sockaddr_in *)sa; |
28a0841b RL |
109 | return 1; |
110 | } | |
111 | #ifdef AF_INET6 | |
112 | if (sa->sa_family == AF_INET6) { | |
29620124 | 113 | ap->s_in6 = *(const struct sockaddr_in6 *)sa; |
28a0841b RL |
114 | return 1; |
115 | } | |
116 | #endif | |
117 | #ifdef AF_UNIX | |
118 | if (ap->sa.sa_family == AF_UNIX) { | |
29620124 | 119 | ap->s_un = *(const struct sockaddr_un *)sa; |
28a0841b RL |
120 | return 1; |
121 | } | |
122 | #endif | |
123 | ||
124 | return 0; | |
125 | } | |
126 | ||
127 | int BIO_ADDR_rawmake(BIO_ADDR *ap, int family, | |
128 | const void *where, size_t wherelen, | |
129 | unsigned short port) | |
130 | { | |
131 | #ifdef AF_UNIX | |
132 | if (family == AF_UNIX) { | |
29620124 | 133 | if (wherelen + 1 > sizeof(ap->s_un.sun_path)) |
28a0841b | 134 | return 0; |
29620124 RL |
135 | memset(&ap->s_un, 0, sizeof(ap->s_un)); |
136 | ap->s_un.sun_family = family; | |
137 | strncpy(ap->s_un.sun_path, where, sizeof(ap->s_un.sun_path) - 1); | |
28a0841b RL |
138 | return 1; |
139 | } | |
140 | #endif | |
141 | if (family == AF_INET) { | |
142 | if (wherelen != sizeof(struct in_addr)) | |
143 | return 0; | |
29620124 RL |
144 | memset(&ap->s_in, 0, sizeof(ap->s_in)); |
145 | ap->s_in.sin_family = family; | |
146 | ap->s_in.sin_port = port; | |
147 | ap->s_in.sin_addr = *(struct in_addr *)where; | |
28a0841b RL |
148 | return 1; |
149 | } | |
150 | #ifdef AF_INET6 | |
151 | if (family == AF_INET6) { | |
152 | if (wherelen != sizeof(struct in6_addr)) | |
153 | return 0; | |
29620124 RL |
154 | memset(&ap->s_in6, 0, sizeof(ap->s_in6)); |
155 | ap->s_in6.sin6_family = family; | |
156 | ap->s_in6.sin6_port = port; | |
157 | ap->s_in6.sin6_addr = *(struct in6_addr *)where; | |
28a0841b RL |
158 | return 1; |
159 | } | |
160 | #endif | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
165 | int BIO_ADDR_family(const BIO_ADDR *ap) | |
166 | { | |
167 | return ap->sa.sa_family; | |
168 | } | |
169 | ||
170 | int BIO_ADDR_rawaddress(const BIO_ADDR *ap, void *p, size_t *l) | |
171 | { | |
172 | size_t len = 0; | |
173 | const void *addrptr = NULL; | |
174 | ||
175 | if (ap->sa.sa_family == AF_INET) { | |
29620124 RL |
176 | len = sizeof(ap->s_in.sin_addr); |
177 | addrptr = &ap->s_in.sin_addr; | |
28a0841b RL |
178 | } |
179 | #ifdef AF_INET6 | |
180 | else if (ap->sa.sa_family == AF_INET6) { | |
29620124 RL |
181 | len = sizeof(ap->s_in6.sin6_addr); |
182 | addrptr = &ap->s_in6.sin6_addr; | |
28a0841b RL |
183 | } |
184 | #endif | |
185 | #ifdef AF_UNIX | |
186 | else if (ap->sa.sa_family == AF_UNIX) { | |
29620124 RL |
187 | len = strlen(ap->s_un.sun_path); |
188 | addrptr = &ap->s_un.sun_path; | |
28a0841b RL |
189 | } |
190 | #endif | |
191 | ||
192 | if (addrptr == NULL) | |
193 | return 0; | |
194 | ||
195 | if (p != NULL) { | |
196 | memcpy(p, addrptr, len); | |
197 | } | |
198 | if (l != NULL) | |
199 | *l = len; | |
200 | ||
201 | return 1; | |
202 | } | |
203 | ||
204 | unsigned short BIO_ADDR_rawport(const BIO_ADDR *ap) | |
205 | { | |
206 | if (ap->sa.sa_family == AF_INET) | |
29620124 | 207 | return ap->s_in.sin_port; |
28a0841b RL |
208 | #ifdef AF_INET6 |
209 | if (ap->sa.sa_family == AF_INET6) | |
29620124 | 210 | return ap->s_in6.sin6_port; |
28a0841b RL |
211 | #endif |
212 | return 0; | |
213 | } | |
214 | ||
215 | /*- | |
216 | * addr_strings - helper function to get host and service names | |
217 | * @ap: the BIO_ADDR that has the input info | |
218 | * @numeric: 0 if actual names should be returned, 1 if the numeric | |
219 | * representation should be returned. | |
220 | * @hostname: a pointer to a pointer to a memory area to store the | |
221 | * host name or numeric representation. Unused if NULL. | |
222 | * @service: a pointer to a pointer to a memory area to store the | |
223 | * service name or numeric representation. Unused if NULL. | |
224 | * | |
225 | * The return value is 0 on failure, with the error code in the error | |
226 | * stack, and 1 on success. | |
227 | */ | |
228 | static int addr_strings(const BIO_ADDR *ap, int numeric, | |
229 | char **hostname, char **service) | |
230 | { | |
ed03c461 RL |
231 | if (BIO_sock_init() != 1) |
232 | return 0; | |
233 | ||
28a0841b RL |
234 | if (1) { |
235 | #ifdef AI_PASSIVE | |
236 | int ret = 0; | |
6faffd0a | 237 | char host[NI_MAXHOST] = "", serv[NI_MAXSERV] = ""; |
28a0841b RL |
238 | int flags = 0; |
239 | ||
240 | if (numeric) | |
241 | flags |= NI_NUMERICHOST | NI_NUMERICSERV; | |
242 | ||
243 | if ((ret = getnameinfo(BIO_ADDR_sockaddr(ap), | |
244 | BIO_ADDR_sockaddr_size(ap), | |
245 | host, sizeof(host), serv, sizeof(serv), | |
246 | flags)) != 0) { | |
247 | # ifdef EAI_SYSTEM | |
248 | if (ret == EAI_SYSTEM) { | |
249 | SYSerr(SYS_F_GETNAMEINFO, get_last_socket_error()); | |
250 | BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); | |
251 | } else | |
252 | # endif | |
253 | { | |
254 | BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); | |
255 | ERR_add_error_data(1, gai_strerror(ret)); | |
256 | } | |
257 | return 0; | |
258 | } | |
d40cf9bc | 259 | |
6faffd0a RL |
260 | /* VMS getnameinfo() has a bug, it doesn't fill in serv, which |
261 | * leaves it with whatever garbage that happens to be there. | |
262 | * However, we initialise serv with the empty string (serv[0] | |
263 | * is therefore NUL), so it gets real easy to detect when things | |
264 | * didn't go the way one might expect. | |
d40cf9bc | 265 | */ |
6faffd0a | 266 | if (serv[0] == '\0') { |
d40cf9bc RL |
267 | BIO_snprintf(serv, sizeof(serv), "%d", |
268 | ntohs(BIO_ADDR_rawport(ap))); | |
269 | } | |
270 | ||
28a0841b RL |
271 | if (hostname) |
272 | *hostname = OPENSSL_strdup(host); | |
273 | if (service) | |
274 | *service = OPENSSL_strdup(serv); | |
275 | } else { | |
276 | #endif | |
277 | if (hostname) | |
29620124 | 278 | *hostname = OPENSSL_strdup(inet_ntoa(ap->s_in.sin_addr)); |
28a0841b RL |
279 | if (service) { |
280 | char serv[6]; /* port is 16 bits => max 5 decimal digits */ | |
29620124 | 281 | BIO_snprintf(serv, sizeof(serv), "%d", ntohs(ap->s_in.sin_port)); |
28a0841b RL |
282 | *service = OPENSSL_strdup(serv); |
283 | } | |
284 | } | |
285 | ||
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: | |
569 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_AMBIGUOUS_HOST_OR_SERVICE); | |
570 | return 0; | |
571 | spec_err: | |
572 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_MALFORMED_HOST_OR_SERVICE); | |
573 | return 0; | |
574 | memerr: | |
575 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, ERR_R_MALLOC_FAILURE); | |
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 | |
586 | * only happens if a memory allocation error occured. | |
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 | { | |
593 | OPENSSL_assert(bai != NULL); | |
594 | ||
43ecb9c3 | 595 | *bai = OPENSSL_zalloc(sizeof(**bai)); |
28a0841b RL |
596 | if (*bai == NULL) |
597 | return 0; | |
43ecb9c3 | 598 | |
28a0841b RL |
599 | (*bai)->bai_family = family; |
600 | (*bai)->bai_socktype = socktype; | |
601 | if (socktype == SOCK_STREAM) | |
602 | (*bai)->bai_protocol = IPPROTO_TCP; | |
603 | if (socktype == SOCK_DGRAM) | |
604 | (*bai)->bai_protocol = IPPROTO_UDP; | |
605 | #ifdef AF_UNIX | |
606 | if (family == AF_UNIX) | |
607 | (*bai)->bai_protocol = 0; | |
608 | #endif | |
609 | { | |
610 | /* Magic: We know that BIO_ADDR_sockaddr_noconst is really | |
611 | just an advanced cast of BIO_ADDR* to struct sockaddr * | |
612 | by the power of union, so while it may seem that we're | |
613 | creating a memory leak here, we are not. It will be | |
614 | all right. */ | |
615 | BIO_ADDR *addr = BIO_ADDR_new(); | |
616 | if (addr != NULL) { | |
617 | BIO_ADDR_rawmake(addr, family, where, wherelen, port); | |
618 | (*bai)->bai_addr = BIO_ADDR_sockaddr_noconst(addr); | |
619 | } | |
620 | } | |
621 | (*bai)->bai_next = NULL; | |
622 | if ((*bai)->bai_addr == NULL) { | |
623 | BIO_ADDRINFO_free(*bai); | |
624 | *bai = NULL; | |
625 | return 0; | |
626 | } | |
627 | return 1; | |
628 | } | |
629 | ||
f989cd8c AG |
630 | static void do_bio_lookup_init(void) |
631 | { | |
632 | bio_lookup_lock = CRYPTO_THREAD_lock_new(); | |
633 | } | |
634 | ||
28a0841b RL |
635 | /*- |
636 | * BIO_lookup - look up the node and service you want to connect to. | |
637 | * @node: the node you want to connect to. | |
638 | * @service: the service you want to connect to. | |
639 | * @lookup_type: declare intent with the result, client or server. | |
640 | * @family: the address family you want to use. Use AF_UNSPEC for any, or | |
641 | * AF_INET, AF_INET6 or AF_UNIX. | |
642 | * @socktype: The socket type you want to use. Can be SOCK_STREAM, SOCK_DGRAM | |
643 | * or 0 for all. | |
644 | * @res: Storage place for the resulting list of returned addresses | |
645 | * | |
646 | * This will do a lookup of the node and service that you want to connect to. | |
647 | * It returns a linked list of different addresses you can try to connect to. | |
648 | * | |
649 | * When no longer needed you should call BIO_ADDRINFO_free() to free the result. | |
650 | * | |
651 | * The return value is 1 on success or 0 in case of error. | |
652 | */ | |
653 | int BIO_lookup(const char *host, const char *service, | |
654 | enum BIO_lookup_type lookup_type, | |
655 | int family, int socktype, BIO_ADDRINFO **res) | |
656 | { | |
657 | int ret = 0; /* Assume failure */ | |
658 | ||
659 | switch(family) { | |
660 | case AF_INET: | |
661 | #ifdef AF_INET6 | |
662 | case AF_INET6: | |
663 | #endif | |
664 | #ifdef AF_UNIX | |
665 | case AF_UNIX: | |
666 | #endif | |
667 | #ifdef AF_UNSPEC | |
668 | case AF_UNSPEC: | |
669 | #endif | |
670 | break; | |
671 | default: | |
672 | BIOerr(BIO_F_BIO_LOOKUP, BIO_R_UNSUPPORTED_PROTOCOL_FAMILY); | |
673 | return 0; | |
674 | } | |
675 | ||
676 | #ifdef AF_UNIX | |
677 | if (family == AF_UNIX) { | |
678 | if (addrinfo_wrap(family, socktype, host, strlen(host), 0, res)) | |
679 | return 1; | |
680 | else | |
681 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_MALLOC_FAILURE); | |
682 | return 0; | |
683 | } | |
684 | #endif | |
685 | ||
ed03c461 RL |
686 | if (BIO_sock_init() != 1) |
687 | return 0; | |
688 | ||
28a0841b | 689 | if (1) { |
ed03c461 | 690 | int gai_ret = 0; |
28a0841b RL |
691 | #ifdef AI_PASSIVE |
692 | struct addrinfo hints; | |
f0496ad7 | 693 | memset(&hints, 0, sizeof hints); |
28a0841b | 694 | |
28a0841b RL |
695 | # ifdef AI_ADDRCONFIG |
696 | hints.ai_flags = AI_ADDRCONFIG; | |
697 | # endif | |
698 | hints.ai_family = family; | |
699 | hints.ai_socktype = socktype; | |
28a0841b RL |
700 | |
701 | if (lookup_type == BIO_LOOKUP_SERVER) | |
702 | hints.ai_flags |= AI_PASSIVE; | |
703 | ||
704 | /* Note that |res| SHOULD be a 'struct addrinfo **' thanks to | |
705 | * macro magic in bio_lcl.h | |
706 | */ | |
ed03c461 | 707 | switch ((gai_ret = getaddrinfo(host, service, &hints, res))) { |
28a0841b RL |
708 | # ifdef EAI_SYSTEM |
709 | case EAI_SYSTEM: | |
710 | SYSerr(SYS_F_GETADDRINFO, get_last_socket_error()); | |
711 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); | |
712 | break; | |
713 | # endif | |
714 | case 0: | |
715 | ret = 1; /* Success */ | |
716 | break; | |
717 | default: | |
718 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); | |
ed03c461 | 719 | ERR_add_error_data(1, gai_strerror(gai_ret)); |
28a0841b RL |
720 | break; |
721 | } | |
722 | } else { | |
723 | #endif | |
37e3daf4 | 724 | const struct hostent *he; |
28a0841b RL |
725 | /* Windows doesn't seem to have in_addr_t */ |
726 | #ifdef OPENSSL_SYS_WINDOWS | |
37e3daf4 KR |
727 | static uint32_t he_fallback_address; |
728 | static const uint32_t *he_fallback_addresses[] = | |
729 | { &he_fallback_address, NULL }; | |
28a0841b | 730 | #else |
37e3daf4 KR |
731 | static in_addr_t he_fallback_address; |
732 | static const in_addr_t *he_fallback_addresses[] = | |
733 | { &he_fallback_address, NULL }; | |
28a0841b | 734 | #endif |
37e3daf4 KR |
735 | static const struct hostent he_fallback = |
736 | { NULL, NULL, AF_INET, sizeof(he_fallback_address), | |
737 | (char **)&he_fallback_addresses }; | |
28a0841b RL |
738 | struct servent *se; |
739 | /* Apprently, on WIN64, s_proto and s_port have traded places... */ | |
740 | #ifdef _WIN64 | |
741 | struct servent se_fallback = { NULL, NULL, NULL, 0 }; | |
742 | #else | |
743 | struct servent se_fallback = { NULL, NULL, 0, NULL }; | |
744 | #endif | |
745 | char *proto = NULL; | |
746 | ||
f989cd8c AG |
747 | CRYPTO_THREAD_run_once(&bio_lookup_init, do_bio_lookup_init); |
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: | |
761 | OPENSSL_assert(("We forgot to handle a lookup type!" == 0)); | |
762 | break; | |
763 | } | |
764 | } else { | |
765 | he = gethostbyname(host); | |
766 | ||
767 | if (he == NULL) { | |
c86d1f19 | 768 | #ifndef OPENSSL_SYS_WINDOWS |
28a0841b RL |
769 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); |
770 | ERR_add_error_data(1, hstrerror(h_errno)); | |
c86d1f19 KR |
771 | #else |
772 | SYSerr(SYS_F_GETHOSTBYNAME, WSAGetLastError()); | |
773 | #endif | |
28a0841b RL |
774 | ret = 0; |
775 | goto err; | |
776 | } | |
777 | } | |
778 | ||
779 | if (service == NULL) { | |
780 | se_fallback.s_port = 0; | |
781 | se_fallback.s_proto = proto; | |
782 | se = &se_fallback; | |
783 | } else { | |
784 | char *endp = NULL; | |
785 | long portnum = strtol(service, &endp, 10); | |
786 | ||
787 | if (endp != service && *endp == '\0' | |
788 | && portnum > 0 && portnum < 65536) { | |
789 | se_fallback.s_port = htons(portnum); | |
790 | se_fallback.s_proto = proto; | |
791 | se = &se_fallback; | |
792 | } else if (endp == service) { | |
793 | switch (socktype) { | |
794 | case SOCK_STREAM: | |
795 | proto = "tcp"; | |
796 | break; | |
797 | case SOCK_DGRAM: | |
798 | proto = "udp"; | |
799 | break; | |
800 | } | |
801 | se = getservbyname(service, proto); | |
802 | ||
803 | if (se == NULL) { | |
c86d1f19 | 804 | #ifndef OPENSSL_SYS_WINDOWS |
28a0841b RL |
805 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); |
806 | ERR_add_error_data(1, hstrerror(h_errno)); | |
c86d1f19 KR |
807 | #else |
808 | SYSerr(SYS_F_GETSERVBYNAME, WSAGetLastError()); | |
809 | #endif | |
28a0841b RL |
810 | goto err; |
811 | } | |
812 | } else { | |
813 | BIOerr(BIO_F_BIO_LOOKUP, BIO_R_MALFORMED_HOST_OR_SERVICE); | |
814 | goto err; | |
815 | } | |
816 | } | |
817 | ||
818 | *res = NULL; | |
819 | ||
820 | { | |
821 | char **addrlistp; | |
822 | size_t addresses; | |
823 | BIO_ADDRINFO *tmp_bai = NULL; | |
824 | ||
825 | /* The easiest way to create a linked list from an | |
826 | array is to start from the back */ | |
827 | for(addrlistp = he->h_addr_list; *addrlistp != NULL; | |
828 | addrlistp++) | |
829 | ; | |
830 | ||
831 | for(addresses = addrlistp - he->h_addr_list; | |
832 | addrlistp--, addresses-- > 0; ) { | |
833 | if (!addrinfo_wrap(he->h_addrtype, socktype, | |
834 | *addrlistp, he->h_length, | |
835 | se->s_port, &tmp_bai)) | |
836 | goto addrinfo_malloc_err; | |
837 | tmp_bai->bai_next = *res; | |
838 | *res = tmp_bai; | |
839 | continue; | |
840 | addrinfo_malloc_err: | |
841 | BIO_ADDRINFO_free(*res); | |
842 | *res = NULL; | |
843 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_MALLOC_FAILURE); | |
844 | ret = 0; | |
845 | goto err; | |
846 | } | |
847 | ||
848 | ret = 1; | |
849 | } | |
850 | err: | |
f989cd8c | 851 | CRYPTO_THREAD_unlock(bio_lookup_lock); |
28a0841b RL |
852 | } |
853 | ||
854 | return ret; | |
855 | } | |
1288f26f | 856 | #endif /* OPENSSL_NO_SOCK */ |