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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" | |
5c4328f0 | 58 | #include <openssl/crypto.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 | |
ff234405 | 65 | CRYPTO_RWLOCK *bio_lookup_lock; |
f989cd8c AG |
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 | ||
cb1d435c MRA |
86 | if (ret == NULL) { |
87 | BIOerr(BIO_F_BIO_ADDR_NEW, ERR_R_MALLOC_FAILURE); | |
138388fe | 88 | return NULL; |
cb1d435c | 89 | } |
138388fe | 90 | |
7d1d48a2 | 91 | ret->sa.sa_family = AF_UNSPEC; |
28a0841b RL |
92 | return ret; |
93 | } | |
94 | ||
95 | void BIO_ADDR_free(BIO_ADDR *ap) | |
96 | { | |
97 | OPENSSL_free(ap); | |
98 | } | |
99 | ||
7d1d48a2 MC |
100 | void BIO_ADDR_clear(BIO_ADDR *ap) |
101 | { | |
102 | memset(ap, 0, sizeof(*ap)); | |
103 | ap->sa.sa_family = AF_UNSPEC; | |
104 | } | |
105 | ||
28a0841b RL |
106 | /* |
107 | * BIO_ADDR_make - non-public routine to fill a BIO_ADDR with the contents | |
108 | * of a struct sockaddr. | |
109 | */ | |
110 | int BIO_ADDR_make(BIO_ADDR *ap, const struct sockaddr *sa) | |
111 | { | |
112 | if (sa->sa_family == AF_INET) { | |
29620124 | 113 | ap->s_in = *(const struct sockaddr_in *)sa; |
28a0841b RL |
114 | return 1; |
115 | } | |
116 | #ifdef AF_INET6 | |
117 | if (sa->sa_family == AF_INET6) { | |
29620124 | 118 | ap->s_in6 = *(const struct sockaddr_in6 *)sa; |
28a0841b RL |
119 | return 1; |
120 | } | |
121 | #endif | |
122 | #ifdef AF_UNIX | |
123 | if (ap->sa.sa_family == AF_UNIX) { | |
29620124 | 124 | ap->s_un = *(const struct sockaddr_un *)sa; |
28a0841b RL |
125 | return 1; |
126 | } | |
127 | #endif | |
128 | ||
129 | return 0; | |
130 | } | |
131 | ||
132 | int BIO_ADDR_rawmake(BIO_ADDR *ap, int family, | |
133 | const void *where, size_t wherelen, | |
134 | unsigned short port) | |
135 | { | |
136 | #ifdef AF_UNIX | |
137 | if (family == AF_UNIX) { | |
29620124 | 138 | if (wherelen + 1 > sizeof(ap->s_un.sun_path)) |
28a0841b | 139 | return 0; |
29620124 RL |
140 | memset(&ap->s_un, 0, sizeof(ap->s_un)); |
141 | ap->s_un.sun_family = family; | |
142 | strncpy(ap->s_un.sun_path, where, sizeof(ap->s_un.sun_path) - 1); | |
28a0841b RL |
143 | return 1; |
144 | } | |
145 | #endif | |
146 | if (family == AF_INET) { | |
147 | if (wherelen != sizeof(struct in_addr)) | |
148 | return 0; | |
29620124 RL |
149 | memset(&ap->s_in, 0, sizeof(ap->s_in)); |
150 | ap->s_in.sin_family = family; | |
151 | ap->s_in.sin_port = port; | |
152 | ap->s_in.sin_addr = *(struct in_addr *)where; | |
28a0841b RL |
153 | return 1; |
154 | } | |
155 | #ifdef AF_INET6 | |
156 | if (family == AF_INET6) { | |
157 | if (wherelen != sizeof(struct in6_addr)) | |
158 | return 0; | |
29620124 RL |
159 | memset(&ap->s_in6, 0, sizeof(ap->s_in6)); |
160 | ap->s_in6.sin6_family = family; | |
161 | ap->s_in6.sin6_port = port; | |
162 | ap->s_in6.sin6_addr = *(struct in6_addr *)where; | |
28a0841b RL |
163 | return 1; |
164 | } | |
165 | #endif | |
166 | ||
167 | return 0; | |
168 | } | |
169 | ||
170 | int BIO_ADDR_family(const BIO_ADDR *ap) | |
171 | { | |
172 | return ap->sa.sa_family; | |
173 | } | |
174 | ||
175 | int BIO_ADDR_rawaddress(const BIO_ADDR *ap, void *p, size_t *l) | |
176 | { | |
177 | size_t len = 0; | |
178 | const void *addrptr = NULL; | |
179 | ||
180 | if (ap->sa.sa_family == AF_INET) { | |
29620124 RL |
181 | len = sizeof(ap->s_in.sin_addr); |
182 | addrptr = &ap->s_in.sin_addr; | |
28a0841b RL |
183 | } |
184 | #ifdef AF_INET6 | |
185 | else if (ap->sa.sa_family == AF_INET6) { | |
29620124 RL |
186 | len = sizeof(ap->s_in6.sin6_addr); |
187 | addrptr = &ap->s_in6.sin6_addr; | |
28a0841b RL |
188 | } |
189 | #endif | |
190 | #ifdef AF_UNIX | |
191 | else if (ap->sa.sa_family == AF_UNIX) { | |
29620124 RL |
192 | len = strlen(ap->s_un.sun_path); |
193 | addrptr = &ap->s_un.sun_path; | |
28a0841b RL |
194 | } |
195 | #endif | |
196 | ||
197 | if (addrptr == NULL) | |
198 | return 0; | |
199 | ||
200 | if (p != NULL) { | |
201 | memcpy(p, addrptr, len); | |
202 | } | |
203 | if (l != NULL) | |
204 | *l = len; | |
205 | ||
206 | return 1; | |
207 | } | |
208 | ||
209 | unsigned short BIO_ADDR_rawport(const BIO_ADDR *ap) | |
210 | { | |
211 | if (ap->sa.sa_family == AF_INET) | |
29620124 | 212 | return ap->s_in.sin_port; |
28a0841b RL |
213 | #ifdef AF_INET6 |
214 | if (ap->sa.sa_family == AF_INET6) | |
29620124 | 215 | return ap->s_in6.sin6_port; |
28a0841b RL |
216 | #endif |
217 | return 0; | |
218 | } | |
219 | ||
220 | /*- | |
221 | * addr_strings - helper function to get host and service names | |
222 | * @ap: the BIO_ADDR that has the input info | |
223 | * @numeric: 0 if actual names should be returned, 1 if the numeric | |
224 | * representation should be returned. | |
225 | * @hostname: a pointer to a pointer to a memory area to store the | |
226 | * host name or numeric representation. Unused if NULL. | |
227 | * @service: a pointer to a pointer to a memory area to store the | |
228 | * service name or numeric representation. Unused if NULL. | |
229 | * | |
230 | * The return value is 0 on failure, with the error code in the error | |
231 | * stack, and 1 on success. | |
232 | */ | |
233 | static int addr_strings(const BIO_ADDR *ap, int numeric, | |
234 | char **hostname, char **service) | |
235 | { | |
ed03c461 RL |
236 | if (BIO_sock_init() != 1) |
237 | return 0; | |
238 | ||
28a0841b RL |
239 | if (1) { |
240 | #ifdef AI_PASSIVE | |
241 | int ret = 0; | |
6faffd0a | 242 | char host[NI_MAXHOST] = "", serv[NI_MAXSERV] = ""; |
28a0841b RL |
243 | int flags = 0; |
244 | ||
245 | if (numeric) | |
246 | flags |= NI_NUMERICHOST | NI_NUMERICSERV; | |
247 | ||
248 | if ((ret = getnameinfo(BIO_ADDR_sockaddr(ap), | |
249 | BIO_ADDR_sockaddr_size(ap), | |
250 | host, sizeof(host), serv, sizeof(serv), | |
251 | flags)) != 0) { | |
252 | # ifdef EAI_SYSTEM | |
253 | if (ret == EAI_SYSTEM) { | |
254 | SYSerr(SYS_F_GETNAMEINFO, get_last_socket_error()); | |
255 | BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); | |
256 | } else | |
257 | # endif | |
258 | { | |
259 | BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); | |
260 | ERR_add_error_data(1, gai_strerror(ret)); | |
261 | } | |
262 | return 0; | |
263 | } | |
d40cf9bc | 264 | |
6faffd0a RL |
265 | /* VMS getnameinfo() has a bug, it doesn't fill in serv, which |
266 | * leaves it with whatever garbage that happens to be there. | |
267 | * However, we initialise serv with the empty string (serv[0] | |
268 | * is therefore NUL), so it gets real easy to detect when things | |
269 | * didn't go the way one might expect. | |
d40cf9bc | 270 | */ |
6faffd0a | 271 | if (serv[0] == '\0') { |
d40cf9bc RL |
272 | BIO_snprintf(serv, sizeof(serv), "%d", |
273 | ntohs(BIO_ADDR_rawport(ap))); | |
274 | } | |
275 | ||
28a0841b RL |
276 | if (hostname) |
277 | *hostname = OPENSSL_strdup(host); | |
278 | if (service) | |
279 | *service = OPENSSL_strdup(serv); | |
280 | } else { | |
281 | #endif | |
282 | if (hostname) | |
29620124 | 283 | *hostname = OPENSSL_strdup(inet_ntoa(ap->s_in.sin_addr)); |
28a0841b RL |
284 | if (service) { |
285 | char serv[6]; /* port is 16 bits => max 5 decimal digits */ | |
29620124 | 286 | BIO_snprintf(serv, sizeof(serv), "%d", ntohs(ap->s_in.sin_port)); |
28a0841b RL |
287 | *service = OPENSSL_strdup(serv); |
288 | } | |
289 | } | |
290 | ||
291 | return 1; | |
292 | } | |
293 | ||
294 | char *BIO_ADDR_hostname_string(const BIO_ADDR *ap, int numeric) | |
295 | { | |
296 | char *hostname = NULL; | |
297 | ||
298 | if (addr_strings(ap, numeric, &hostname, NULL)) | |
299 | return hostname; | |
300 | ||
301 | return NULL; | |
302 | } | |
303 | ||
304 | char *BIO_ADDR_service_string(const BIO_ADDR *ap, int numeric) | |
305 | { | |
306 | char *service = NULL; | |
307 | ||
308 | if (addr_strings(ap, numeric, NULL, &service)) | |
309 | return service; | |
310 | ||
311 | return NULL; | |
312 | } | |
313 | ||
314 | char *BIO_ADDR_path_string(const BIO_ADDR *ap) | |
315 | { | |
316 | #ifdef AF_UNIX | |
317 | if (ap->sa.sa_family == AF_UNIX) | |
29620124 | 318 | return OPENSSL_strdup(ap->s_un.sun_path); |
28a0841b RL |
319 | #endif |
320 | return NULL; | |
321 | } | |
322 | ||
323 | /* | |
324 | * BIO_ADDR_sockaddr - non-public routine to return the struct sockaddr | |
325 | * for a given BIO_ADDR. In reality, this is simply a type safe cast. | |
326 | * The returned struct sockaddr is const, so it can't be tampered with. | |
327 | */ | |
328 | const struct sockaddr *BIO_ADDR_sockaddr(const BIO_ADDR *ap) | |
329 | { | |
330 | return &(ap->sa); | |
331 | } | |
332 | ||
333 | /* | |
334 | * BIO_ADDR_sockaddr_noconst - non-public function that does the same | |
335 | * as BIO_ADDR_sockaddr, but returns a non-const. USE WITH CARE, as | |
336 | * it allows you to tamper with the data (and thereby the contents | |
337 | * of the input BIO_ADDR). | |
338 | */ | |
339 | struct sockaddr *BIO_ADDR_sockaddr_noconst(BIO_ADDR *ap) | |
340 | { | |
341 | return &(ap->sa); | |
342 | } | |
343 | ||
344 | /* | |
345 | * BIO_ADDR_sockaddr_size - non-public function that returns the size | |
346 | * of the struct sockaddr the BIO_ADDR is using. If the protocol family | |
347 | * isn't set or is something other than AF_INET, AF_INET6 or AF_UNIX, | |
348 | * the size of the BIO_ADDR type is returned. | |
349 | */ | |
350 | socklen_t BIO_ADDR_sockaddr_size(const BIO_ADDR *ap) | |
351 | { | |
352 | if (ap->sa.sa_family == AF_INET) | |
29620124 | 353 | return sizeof(ap->s_in); |
28a0841b RL |
354 | #ifdef AF_INET6 |
355 | if (ap->sa.sa_family == AF_INET6) | |
29620124 | 356 | return sizeof(ap->s_in6); |
28a0841b RL |
357 | #endif |
358 | #ifdef AF_UNIX | |
359 | if (ap->sa.sa_family == AF_UNIX) | |
29620124 | 360 | return sizeof(ap->s_un); |
28a0841b RL |
361 | #endif |
362 | return sizeof(*ap); | |
363 | } | |
364 | ||
365 | /********************************************************************** | |
366 | * | |
e5a82bfd | 367 | * Address info database |
28a0841b RL |
368 | * |
369 | */ | |
370 | ||
371 | const BIO_ADDRINFO *BIO_ADDRINFO_next(const BIO_ADDRINFO *bai) | |
372 | { | |
373 | if (bai != NULL) | |
374 | return bai->bai_next; | |
375 | return NULL; | |
376 | } | |
377 | ||
378 | int BIO_ADDRINFO_family(const BIO_ADDRINFO *bai) | |
379 | { | |
380 | if (bai != NULL) | |
381 | return bai->bai_family; | |
382 | return 0; | |
383 | } | |
384 | ||
385 | int BIO_ADDRINFO_socktype(const BIO_ADDRINFO *bai) | |
386 | { | |
387 | if (bai != NULL) | |
388 | return bai->bai_socktype; | |
389 | return 0; | |
390 | } | |
391 | ||
392 | int BIO_ADDRINFO_protocol(const BIO_ADDRINFO *bai) | |
393 | { | |
c72fb77f RL |
394 | if (bai != NULL) { |
395 | if (bai->bai_protocol != 0) | |
396 | return bai->bai_protocol; | |
397 | ||
398 | #ifdef AF_UNIX | |
399 | if (bai->bai_family == AF_UNIX) | |
400 | return 0; | |
401 | #endif | |
402 | ||
403 | switch (bai->bai_socktype) { | |
404 | case SOCK_STREAM: | |
405 | return IPPROTO_TCP; | |
406 | case SOCK_DGRAM: | |
407 | return IPPROTO_UDP; | |
408 | default: | |
409 | break; | |
410 | } | |
411 | } | |
28a0841b RL |
412 | return 0; |
413 | } | |
414 | ||
415 | /* | |
416 | * BIO_ADDRINFO_sockaddr_size - non-public function that returns the size | |
417 | * of the struct sockaddr inside the BIO_ADDRINFO. | |
418 | */ | |
419 | socklen_t BIO_ADDRINFO_sockaddr_size(const BIO_ADDRINFO *bai) | |
420 | { | |
421 | if (bai != NULL) | |
422 | return bai->bai_addrlen; | |
423 | return 0; | |
424 | } | |
425 | ||
426 | /* | |
427 | * BIO_ADDRINFO_sockaddr - non-public function that returns bai_addr | |
428 | * as the struct sockaddr it is. | |
429 | */ | |
430 | const struct sockaddr *BIO_ADDRINFO_sockaddr(const BIO_ADDRINFO *bai) | |
431 | { | |
432 | if (bai != NULL) | |
433 | return bai->bai_addr; | |
434 | return NULL; | |
435 | } | |
436 | ||
437 | const BIO_ADDR *BIO_ADDRINFO_address(const BIO_ADDRINFO *bai) | |
438 | { | |
439 | if (bai != NULL) | |
440 | return (BIO_ADDR *)bai->bai_addr; | |
441 | return NULL; | |
442 | } | |
443 | ||
444 | void BIO_ADDRINFO_free(BIO_ADDRINFO *bai) | |
445 | { | |
446 | if (bai == NULL) | |
447 | return; | |
448 | ||
449 | #ifdef AI_PASSIVE | |
450 | # ifdef AF_UNIX | |
451 | # define _cond bai->bai_family != AF_UNIX | |
452 | # else | |
453 | # define _cond 1 | |
454 | # endif | |
455 | if (_cond) { | |
456 | freeaddrinfo(bai); | |
457 | return; | |
458 | } | |
459 | #endif | |
460 | ||
461 | /* Free manually when we know that addrinfo_wrap() was used. | |
462 | * See further comment above addrinfo_wrap() | |
463 | */ | |
464 | while (bai != NULL) { | |
465 | BIO_ADDRINFO *next = bai->bai_next; | |
466 | OPENSSL_free(bai->bai_addr); | |
467 | OPENSSL_free(bai); | |
468 | bai = next; | |
469 | } | |
470 | } | |
471 | ||
472 | /********************************************************************** | |
473 | * | |
474 | * Service functions | |
475 | * | |
476 | */ | |
477 | ||
478 | /*- | |
479 | * The specs in hostserv can take these forms: | |
480 | * | |
481 | * host:service => *host = "host", *service = "service" | |
482 | * host:* => *host = "host", *service = NULL | |
483 | * host: => *host = "host", *service = NULL | |
484 | * :service => *host = NULL, *service = "service" | |
485 | * *:service => *host = NULL, *service = "service" | |
486 | * | |
487 | * in case no : is present in the string, the result depends on | |
488 | * hostserv_prio, as follows: | |
489 | * | |
490 | * when hostserv_prio == BIO_PARSE_PRIO_HOST | |
491 | * host => *host = "host", *service untouched | |
492 | * | |
493 | * when hostserv_prio == BIO_PARSE_PRIO_SERV | |
494 | * service => *host untouched, *service = "service" | |
495 | * | |
496 | */ | |
497 | int BIO_parse_hostserv(const char *hostserv, char **host, char **service, | |
498 | enum BIO_hostserv_priorities hostserv_prio) | |
499 | { | |
500 | const char *h = NULL; size_t hl = 0; | |
501 | const char *p = NULL; size_t pl = 0; | |
502 | ||
503 | if (*hostserv == '[') { | |
504 | if ((p = strchr(hostserv, ']')) == NULL) | |
505 | goto spec_err; | |
506 | h = hostserv + 1; | |
507 | hl = p - h; | |
508 | p++; | |
509 | if (*p == '\0') | |
510 | p = NULL; | |
511 | else if (*p != ':') | |
512 | goto spec_err; | |
513 | else { | |
514 | p++; | |
515 | pl = strlen(p); | |
516 | } | |
517 | } else { | |
518 | const char *p2 = strrchr(hostserv, ':'); | |
519 | p = strchr(hostserv, ':'); | |
520 | ||
521 | /*- | |
522 | * Check for more than one colon. There are three possible | |
523 | * interpretations: | |
524 | * 1. IPv6 address with port number, last colon being separator. | |
525 | * 2. IPv6 address only. | |
526 | * 3. IPv6 address only if hostserv_prio == BIO_PARSE_PRIO_HOST, | |
527 | * IPv6 address and port number if hostserv_prio == BIO_PARSE_PRIO_SERV | |
528 | * Because of this ambiguity, we currently choose to make it an | |
529 | * error. | |
530 | */ | |
531 | if (p != p2) | |
532 | goto amb_err; | |
533 | ||
534 | if (p != NULL) { | |
535 | h = hostserv; | |
536 | hl = p - h; | |
537 | p++; | |
538 | pl = strlen(p); | |
539 | } else if (hostserv_prio == BIO_PARSE_PRIO_HOST) { | |
540 | h = hostserv; | |
541 | hl = strlen(h); | |
542 | } else { | |
543 | p = hostserv; | |
544 | pl = strlen(p); | |
545 | } | |
546 | } | |
547 | ||
80926502 | 548 | if (p != NULL && strchr(p, ':')) |
28a0841b RL |
549 | goto spec_err; |
550 | ||
551 | if (h != NULL && host != NULL) { | |
552 | if (hl == 0 | |
553 | || (hl == 1 && h[0] == '*')) { | |
554 | *host = NULL; | |
555 | } else { | |
556 | *host = OPENSSL_strndup(h, hl); | |
557 | if (*host == NULL) | |
558 | goto memerr; | |
559 | } | |
560 | } | |
561 | if (p != NULL && service != NULL) { | |
562 | if (pl == 0 | |
563 | || (pl == 1 && p[0] == '*')) { | |
564 | *service = NULL; | |
565 | } else { | |
566 | *service = OPENSSL_strndup(p, pl); | |
567 | if (*service == NULL) | |
568 | goto memerr; | |
569 | } | |
570 | } | |
571 | ||
572 | return 1; | |
573 | amb_err: | |
574 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_AMBIGUOUS_HOST_OR_SERVICE); | |
575 | return 0; | |
576 | spec_err: | |
577 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_MALFORMED_HOST_OR_SERVICE); | |
578 | return 0; | |
579 | memerr: | |
580 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, ERR_R_MALLOC_FAILURE); | |
581 | return 0; | |
582 | } | |
583 | ||
584 | /* addrinfo_wrap is used to build our own addrinfo "chain". | |
585 | * (it has only one entry, so calling it a chain may be a stretch) | |
586 | * It should ONLY be called when getaddrinfo() and friends | |
587 | * aren't available, OR when dealing with a non IP protocol | |
588 | * family, such as AF_UNIX | |
589 | * | |
590 | * the return value is 1 on success, or 0 on failure, which | |
8483a003 | 591 | * only happens if a memory allocation error occurred. |
28a0841b RL |
592 | */ |
593 | static int addrinfo_wrap(int family, int socktype, | |
594 | const void *where, size_t wherelen, | |
595 | unsigned short port, | |
596 | BIO_ADDRINFO **bai) | |
597 | { | |
598 | OPENSSL_assert(bai != NULL); | |
599 | ||
43ecb9c3 | 600 | *bai = OPENSSL_zalloc(sizeof(**bai)); |
28a0841b RL |
601 | if (*bai == NULL) |
602 | return 0; | |
43ecb9c3 | 603 | |
28a0841b RL |
604 | (*bai)->bai_family = family; |
605 | (*bai)->bai_socktype = socktype; | |
606 | if (socktype == SOCK_STREAM) | |
607 | (*bai)->bai_protocol = IPPROTO_TCP; | |
608 | if (socktype == SOCK_DGRAM) | |
609 | (*bai)->bai_protocol = IPPROTO_UDP; | |
610 | #ifdef AF_UNIX | |
611 | if (family == AF_UNIX) | |
612 | (*bai)->bai_protocol = 0; | |
613 | #endif | |
614 | { | |
615 | /* Magic: We know that BIO_ADDR_sockaddr_noconst is really | |
616 | just an advanced cast of BIO_ADDR* to struct sockaddr * | |
617 | by the power of union, so while it may seem that we're | |
618 | creating a memory leak here, we are not. It will be | |
619 | all right. */ | |
620 | BIO_ADDR *addr = BIO_ADDR_new(); | |
621 | if (addr != NULL) { | |
622 | BIO_ADDR_rawmake(addr, family, where, wherelen, port); | |
623 | (*bai)->bai_addr = BIO_ADDR_sockaddr_noconst(addr); | |
624 | } | |
625 | } | |
626 | (*bai)->bai_next = NULL; | |
627 | if ((*bai)->bai_addr == NULL) { | |
628 | BIO_ADDRINFO_free(*bai); | |
629 | *bai = NULL; | |
630 | return 0; | |
631 | } | |
632 | return 1; | |
633 | } | |
634 | ||
f989cd8c AG |
635 | static void do_bio_lookup_init(void) |
636 | { | |
637 | bio_lookup_lock = CRYPTO_THREAD_lock_new(); | |
638 | } | |
639 | ||
28a0841b RL |
640 | /*- |
641 | * BIO_lookup - look up the node and service you want to connect to. | |
642 | * @node: the node you want to connect to. | |
643 | * @service: the service you want to connect to. | |
644 | * @lookup_type: declare intent with the result, client or server. | |
645 | * @family: the address family you want to use. Use AF_UNSPEC for any, or | |
646 | * AF_INET, AF_INET6 or AF_UNIX. | |
647 | * @socktype: The socket type you want to use. Can be SOCK_STREAM, SOCK_DGRAM | |
648 | * or 0 for all. | |
649 | * @res: Storage place for the resulting list of returned addresses | |
650 | * | |
651 | * This will do a lookup of the node and service that you want to connect to. | |
652 | * It returns a linked list of different addresses you can try to connect to. | |
653 | * | |
654 | * When no longer needed you should call BIO_ADDRINFO_free() to free the result. | |
655 | * | |
656 | * The return value is 1 on success or 0 in case of error. | |
657 | */ | |
658 | int BIO_lookup(const char *host, const char *service, | |
659 | enum BIO_lookup_type lookup_type, | |
660 | int family, int socktype, BIO_ADDRINFO **res) | |
661 | { | |
662 | int ret = 0; /* Assume failure */ | |
663 | ||
664 | switch(family) { | |
665 | case AF_INET: | |
666 | #ifdef AF_INET6 | |
667 | case AF_INET6: | |
668 | #endif | |
669 | #ifdef AF_UNIX | |
670 | case AF_UNIX: | |
671 | #endif | |
672 | #ifdef AF_UNSPEC | |
673 | case AF_UNSPEC: | |
674 | #endif | |
675 | break; | |
676 | default: | |
677 | BIOerr(BIO_F_BIO_LOOKUP, BIO_R_UNSUPPORTED_PROTOCOL_FAMILY); | |
678 | return 0; | |
679 | } | |
680 | ||
681 | #ifdef AF_UNIX | |
682 | if (family == AF_UNIX) { | |
683 | if (addrinfo_wrap(family, socktype, host, strlen(host), 0, res)) | |
684 | return 1; | |
685 | else | |
686 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_MALLOC_FAILURE); | |
687 | return 0; | |
688 | } | |
689 | #endif | |
690 | ||
ed03c461 RL |
691 | if (BIO_sock_init() != 1) |
692 | return 0; | |
693 | ||
28a0841b | 694 | if (1) { |
ed03c461 | 695 | int gai_ret = 0; |
28a0841b RL |
696 | #ifdef AI_PASSIVE |
697 | struct addrinfo hints; | |
f0496ad7 | 698 | memset(&hints, 0, sizeof hints); |
28a0841b | 699 | |
28a0841b RL |
700 | # ifdef AI_ADDRCONFIG |
701 | hints.ai_flags = AI_ADDRCONFIG; | |
702 | # endif | |
703 | hints.ai_family = family; | |
704 | hints.ai_socktype = socktype; | |
28a0841b RL |
705 | |
706 | if (lookup_type == BIO_LOOKUP_SERVER) | |
707 | hints.ai_flags |= AI_PASSIVE; | |
708 | ||
709 | /* Note that |res| SHOULD be a 'struct addrinfo **' thanks to | |
710 | * macro magic in bio_lcl.h | |
711 | */ | |
ed03c461 | 712 | switch ((gai_ret = getaddrinfo(host, service, &hints, res))) { |
28a0841b RL |
713 | # ifdef EAI_SYSTEM |
714 | case EAI_SYSTEM: | |
715 | SYSerr(SYS_F_GETADDRINFO, get_last_socket_error()); | |
716 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); | |
717 | break; | |
718 | # endif | |
719 | case 0: | |
720 | ret = 1; /* Success */ | |
721 | break; | |
722 | default: | |
723 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); | |
ed03c461 | 724 | ERR_add_error_data(1, gai_strerror(gai_ret)); |
28a0841b RL |
725 | break; |
726 | } | |
727 | } else { | |
728 | #endif | |
37e3daf4 | 729 | const struct hostent *he; |
fcd9c8c0 RL |
730 | /* |
731 | * Because struct hostent is defined for 32-bit pointers only with | |
732 | * VMS C, we need to make sure that '&he_fallback_address' and | |
733 | * '&he_fallback_addresses' are 32-bit pointers | |
734 | */ | |
735 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) | |
736 | # pragma pointer_size save | |
737 | # pragma pointer_size 32 | |
738 | #endif | |
28a0841b RL |
739 | /* Windows doesn't seem to have in_addr_t */ |
740 | #ifdef OPENSSL_SYS_WINDOWS | |
37e3daf4 KR |
741 | static uint32_t he_fallback_address; |
742 | static const uint32_t *he_fallback_addresses[] = | |
743 | { &he_fallback_address, NULL }; | |
28a0841b | 744 | #else |
37e3daf4 KR |
745 | static in_addr_t he_fallback_address; |
746 | static const in_addr_t *he_fallback_addresses[] = | |
747 | { &he_fallback_address, NULL }; | |
28a0841b | 748 | #endif |
37e3daf4 KR |
749 | static const struct hostent he_fallback = |
750 | { NULL, NULL, AF_INET, sizeof(he_fallback_address), | |
751 | (char **)&he_fallback_addresses }; | |
fcd9c8c0 RL |
752 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) |
753 | # pragma pointer_size restore | |
754 | #endif | |
755 | ||
28a0841b | 756 | struct servent *se; |
8483a003 | 757 | /* Apparently, on WIN64, s_proto and s_port have traded places... */ |
28a0841b RL |
758 | #ifdef _WIN64 |
759 | struct servent se_fallback = { NULL, NULL, NULL, 0 }; | |
760 | #else | |
761 | struct servent se_fallback = { NULL, NULL, 0, NULL }; | |
762 | #endif | |
28a0841b | 763 | |
f989cd8c AG |
764 | CRYPTO_THREAD_run_once(&bio_lookup_init, do_bio_lookup_init); |
765 | ||
766 | CRYPTO_THREAD_write_lock(bio_lookup_lock); | |
37e3daf4 | 767 | he_fallback_address = INADDR_ANY; |
28a0841b RL |
768 | if (host == NULL) { |
769 | he = &he_fallback; | |
770 | switch(lookup_type) { | |
771 | case BIO_LOOKUP_CLIENT: | |
772 | he_fallback_address = INADDR_LOOPBACK; | |
773 | break; | |
774 | case BIO_LOOKUP_SERVER: | |
775 | he_fallback_address = INADDR_ANY; | |
776 | break; | |
777 | default: | |
778 | OPENSSL_assert(("We forgot to handle a lookup type!" == 0)); | |
779 | break; | |
780 | } | |
781 | } else { | |
782 | he = gethostbyname(host); | |
783 | ||
784 | if (he == NULL) { | |
c86d1f19 | 785 | #ifndef OPENSSL_SYS_WINDOWS |
28a0841b RL |
786 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); |
787 | ERR_add_error_data(1, hstrerror(h_errno)); | |
c86d1f19 KR |
788 | #else |
789 | SYSerr(SYS_F_GETHOSTBYNAME, WSAGetLastError()); | |
790 | #endif | |
28a0841b RL |
791 | ret = 0; |
792 | goto err; | |
793 | } | |
794 | } | |
795 | ||
796 | if (service == NULL) { | |
797 | se_fallback.s_port = 0; | |
622c7e99 | 798 | se_fallback.s_proto = NULL; |
28a0841b RL |
799 | se = &se_fallback; |
800 | } else { | |
801 | char *endp = NULL; | |
802 | long portnum = strtol(service, &endp, 10); | |
fcd9c8c0 RL |
803 | |
804 | /* | |
805 | * Because struct servent is defined for 32-bit pointers only with | |
806 | * VMS C, we need to make sure that 'proto' is a 32-bit pointer. | |
807 | */ | |
808 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) | |
809 | # pragma pointer_size save | |
810 | # pragma pointer_size 32 | |
811 | #endif | |
622c7e99 | 812 | char *proto = NULL; |
fcd9c8c0 RL |
813 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) |
814 | # pragma pointer_size restore | |
815 | #endif | |
622c7e99 RL |
816 | |
817 | switch (socktype) { | |
818 | case SOCK_STREAM: | |
819 | proto = "tcp"; | |
820 | break; | |
821 | case SOCK_DGRAM: | |
822 | proto = "udp"; | |
823 | break; | |
824 | } | |
28a0841b RL |
825 | |
826 | if (endp != service && *endp == '\0' | |
827 | && portnum > 0 && portnum < 65536) { | |
828 | se_fallback.s_port = htons(portnum); | |
829 | se_fallback.s_proto = proto; | |
830 | se = &se_fallback; | |
831 | } else if (endp == service) { | |
28a0841b RL |
832 | se = getservbyname(service, proto); |
833 | ||
834 | if (se == NULL) { | |
c86d1f19 | 835 | #ifndef OPENSSL_SYS_WINDOWS |
28a0841b RL |
836 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); |
837 | ERR_add_error_data(1, hstrerror(h_errno)); | |
c86d1f19 KR |
838 | #else |
839 | SYSerr(SYS_F_GETSERVBYNAME, WSAGetLastError()); | |
840 | #endif | |
28a0841b RL |
841 | goto err; |
842 | } | |
843 | } else { | |
844 | BIOerr(BIO_F_BIO_LOOKUP, BIO_R_MALFORMED_HOST_OR_SERVICE); | |
845 | goto err; | |
846 | } | |
847 | } | |
848 | ||
849 | *res = NULL; | |
850 | ||
851 | { | |
fcd9c8c0 RL |
852 | /* |
853 | * Because hostent::h_addr_list is an array of 32-bit pointers with VMS C, | |
854 | * we must make sure our iterator designates the same element type, hence | |
855 | * the pointer size dance. | |
856 | */ | |
857 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) | |
858 | # pragma pointer_size save | |
859 | # pragma pointer_size 32 | |
860 | #endif | |
28a0841b | 861 | char **addrlistp; |
fcd9c8c0 RL |
862 | #if defined(OPENSSL_SYS_VMS) && defined(__DECC) |
863 | # pragma pointer_size restore | |
864 | #endif | |
28a0841b RL |
865 | size_t addresses; |
866 | BIO_ADDRINFO *tmp_bai = NULL; | |
867 | ||
868 | /* The easiest way to create a linked list from an | |
869 | array is to start from the back */ | |
870 | for(addrlistp = he->h_addr_list; *addrlistp != NULL; | |
871 | addrlistp++) | |
872 | ; | |
873 | ||
874 | for(addresses = addrlistp - he->h_addr_list; | |
875 | addrlistp--, addresses-- > 0; ) { | |
876 | if (!addrinfo_wrap(he->h_addrtype, socktype, | |
877 | *addrlistp, he->h_length, | |
878 | se->s_port, &tmp_bai)) | |
879 | goto addrinfo_malloc_err; | |
880 | tmp_bai->bai_next = *res; | |
881 | *res = tmp_bai; | |
882 | continue; | |
883 | addrinfo_malloc_err: | |
884 | BIO_ADDRINFO_free(*res); | |
885 | *res = NULL; | |
886 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_MALLOC_FAILURE); | |
887 | ret = 0; | |
888 | goto err; | |
889 | } | |
890 | ||
891 | ret = 1; | |
892 | } | |
893 | err: | |
f989cd8c | 894 | CRYPTO_THREAD_unlock(bio_lookup_lock); |
28a0841b RL |
895 | } |
896 | ||
897 | return ret; | |
898 | } | |
ff234405 | 899 | |
1288f26f | 900 | #endif /* OPENSSL_NO_SOCK */ |