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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" | |
58 | ||
59 | #include <openssl/err.h> | |
60 | #include <openssl/buffer.h> | |
61 | ||
62 | /* | |
63 | * Throughout this file and bio_lcl.h, the existence of the macro | |
64 | * AI_PASSIVE is used to detect the availability of struct addrinfo, | |
65 | * getnameinfo() and getaddrinfo(). If that macro doesn't exist, | |
66 | * we use our own implementation instead, using gethostbyname, | |
67 | * getservbyname and a few other. | |
68 | */ | |
69 | ||
70 | /********************************************************************** | |
71 | * | |
72 | * Address structure | |
73 | * | |
74 | */ | |
75 | ||
76 | BIO_ADDR *BIO_ADDR_new(void) | |
77 | { | |
78 | BIO_ADDR *ret = (BIO_ADDR *)OPENSSL_zalloc(sizeof(BIO_ADDR)); | |
79 | return ret; | |
80 | } | |
81 | ||
82 | void BIO_ADDR_free(BIO_ADDR *ap) | |
83 | { | |
84 | OPENSSL_free(ap); | |
85 | } | |
86 | ||
87 | /* | |
88 | * BIO_ADDR_make - non-public routine to fill a BIO_ADDR with the contents | |
89 | * of a struct sockaddr. | |
90 | */ | |
91 | int BIO_ADDR_make(BIO_ADDR *ap, const struct sockaddr *sa) | |
92 | { | |
93 | if (sa->sa_family == AF_INET) { | |
94 | ap->sin = *(const struct sockaddr_in *)sa; | |
95 | return 1; | |
96 | } | |
97 | #ifdef AF_INET6 | |
98 | if (sa->sa_family == AF_INET6) { | |
99 | ap->sin6 = *(const struct sockaddr_in6 *)sa; | |
100 | return 1; | |
101 | } | |
102 | #endif | |
103 | #ifdef AF_UNIX | |
104 | if (ap->sa.sa_family == AF_UNIX) { | |
105 | ap->sun = *(const struct sockaddr_un *)sa; | |
106 | return 1; | |
107 | } | |
108 | #endif | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | int BIO_ADDR_rawmake(BIO_ADDR *ap, int family, | |
114 | const void *where, size_t wherelen, | |
115 | unsigned short port) | |
116 | { | |
117 | #ifdef AF_UNIX | |
118 | if (family == AF_UNIX) { | |
119 | if (wherelen + 1 > sizeof(ap->sun.sun_path)) | |
120 | return 0; | |
121 | memset(&ap->sun, 0, sizeof(ap->sun)); | |
122 | ap->sun.sun_family = family; | |
123 | strncpy(ap->sun.sun_path, where, sizeof(ap->sun.sun_path) - 1); | |
124 | return 1; | |
125 | } | |
126 | #endif | |
127 | if (family == AF_INET) { | |
128 | if (wherelen != sizeof(struct in_addr)) | |
129 | return 0; | |
130 | memset(&ap->sin, 0, sizeof(ap->sin)); | |
131 | ap->sin.sin_family = family; | |
132 | ap->sin.sin_port = port; | |
133 | ap->sin.sin_addr = *(struct in_addr *)where; | |
134 | return 1; | |
135 | } | |
136 | #ifdef AF_INET6 | |
137 | if (family == AF_INET6) { | |
138 | if (wherelen != sizeof(struct in6_addr)) | |
139 | return 0; | |
140 | memset(&ap->sin6, 0, sizeof(ap->sin6)); | |
141 | ap->sin6.sin6_family = family; | |
142 | ap->sin6.sin6_port = port; | |
143 | ap->sin6.sin6_addr = *(struct in6_addr *)where; | |
144 | return 1; | |
145 | } | |
146 | #endif | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | int BIO_ADDR_family(const BIO_ADDR *ap) | |
152 | { | |
153 | return ap->sa.sa_family; | |
154 | } | |
155 | ||
156 | int BIO_ADDR_rawaddress(const BIO_ADDR *ap, void *p, size_t *l) | |
157 | { | |
158 | size_t len = 0; | |
159 | const void *addrptr = NULL; | |
160 | ||
161 | if (ap->sa.sa_family == AF_INET) { | |
162 | len = sizeof(ap->sin.sin_addr); | |
163 | addrptr = &ap->sin.sin_addr; | |
164 | } | |
165 | #ifdef AF_INET6 | |
166 | else if (ap->sa.sa_family == AF_INET6) { | |
167 | len = sizeof(ap->sin6.sin6_addr); | |
168 | addrptr = &ap->sin6.sin6_addr; | |
169 | } | |
170 | #endif | |
171 | #ifdef AF_UNIX | |
172 | else if (ap->sa.sa_family == AF_UNIX) { | |
173 | len = strlen(ap->sun.sun_path); | |
174 | addrptr = &ap->sun.sun_path; | |
175 | } | |
176 | #endif | |
177 | ||
178 | if (addrptr == NULL) | |
179 | return 0; | |
180 | ||
181 | if (p != NULL) { | |
182 | memcpy(p, addrptr, len); | |
183 | } | |
184 | if (l != NULL) | |
185 | *l = len; | |
186 | ||
187 | return 1; | |
188 | } | |
189 | ||
190 | unsigned short BIO_ADDR_rawport(const BIO_ADDR *ap) | |
191 | { | |
192 | if (ap->sa.sa_family == AF_INET) | |
193 | return ap->sin.sin_port; | |
194 | #ifdef AF_INET6 | |
195 | if (ap->sa.sa_family == AF_INET6) | |
196 | return ap->sin6.sin6_port; | |
197 | #endif | |
198 | return 0; | |
199 | } | |
200 | ||
201 | /*- | |
202 | * addr_strings - helper function to get host and service names | |
203 | * @ap: the BIO_ADDR that has the input info | |
204 | * @numeric: 0 if actual names should be returned, 1 if the numeric | |
205 | * representation should be returned. | |
206 | * @hostname: a pointer to a pointer to a memory area to store the | |
207 | * host name or numeric representation. Unused if NULL. | |
208 | * @service: a pointer to a pointer to a memory area to store the | |
209 | * service name or numeric representation. Unused if NULL. | |
210 | * | |
211 | * The return value is 0 on failure, with the error code in the error | |
212 | * stack, and 1 on success. | |
213 | */ | |
214 | static int addr_strings(const BIO_ADDR *ap, int numeric, | |
215 | char **hostname, char **service) | |
216 | { | |
217 | if (1) { | |
218 | #ifdef AI_PASSIVE | |
219 | int ret = 0; | |
220 | char host[NI_MAXHOST], serv[NI_MAXSERV]; | |
221 | int flags = 0; | |
222 | ||
223 | if (numeric) | |
224 | flags |= NI_NUMERICHOST | NI_NUMERICSERV; | |
225 | ||
226 | if ((ret = getnameinfo(BIO_ADDR_sockaddr(ap), | |
227 | BIO_ADDR_sockaddr_size(ap), | |
228 | host, sizeof(host), serv, sizeof(serv), | |
229 | flags)) != 0) { | |
230 | # ifdef EAI_SYSTEM | |
231 | if (ret == EAI_SYSTEM) { | |
232 | SYSerr(SYS_F_GETNAMEINFO, get_last_socket_error()); | |
233 | BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); | |
234 | } else | |
235 | # endif | |
236 | { | |
237 | BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); | |
238 | ERR_add_error_data(1, gai_strerror(ret)); | |
239 | } | |
240 | return 0; | |
241 | } | |
242 | if (hostname) | |
243 | *hostname = OPENSSL_strdup(host); | |
244 | if (service) | |
245 | *service = OPENSSL_strdup(serv); | |
246 | } else { | |
247 | #endif | |
248 | if (hostname) | |
249 | *hostname = OPENSSL_strdup(inet_ntoa(ap->sin.sin_addr)); | |
250 | if (service) { | |
251 | char serv[6]; /* port is 16 bits => max 5 decimal digits */ | |
252 | BIO_snprintf(serv, sizeof(serv), "%d", ntohs(ap->sin.sin_port)); | |
253 | *service = OPENSSL_strdup(serv); | |
254 | } | |
255 | } | |
256 | ||
257 | return 1; | |
258 | } | |
259 | ||
260 | char *BIO_ADDR_hostname_string(const BIO_ADDR *ap, int numeric) | |
261 | { | |
262 | char *hostname = NULL; | |
263 | ||
264 | if (addr_strings(ap, numeric, &hostname, NULL)) | |
265 | return hostname; | |
266 | ||
267 | return NULL; | |
268 | } | |
269 | ||
270 | char *BIO_ADDR_service_string(const BIO_ADDR *ap, int numeric) | |
271 | { | |
272 | char *service = NULL; | |
273 | ||
274 | if (addr_strings(ap, numeric, NULL, &service)) | |
275 | return service; | |
276 | ||
277 | return NULL; | |
278 | } | |
279 | ||
280 | char *BIO_ADDR_path_string(const BIO_ADDR *ap) | |
281 | { | |
282 | #ifdef AF_UNIX | |
283 | if (ap->sa.sa_family == AF_UNIX) | |
284 | return OPENSSL_strdup(ap->sun.sun_path); | |
285 | #endif | |
286 | return NULL; | |
287 | } | |
288 | ||
289 | /* | |
290 | * BIO_ADDR_sockaddr - non-public routine to return the struct sockaddr | |
291 | * for a given BIO_ADDR. In reality, this is simply a type safe cast. | |
292 | * The returned struct sockaddr is const, so it can't be tampered with. | |
293 | */ | |
294 | const struct sockaddr *BIO_ADDR_sockaddr(const BIO_ADDR *ap) | |
295 | { | |
296 | return &(ap->sa); | |
297 | } | |
298 | ||
299 | /* | |
300 | * BIO_ADDR_sockaddr_noconst - non-public function that does the same | |
301 | * as BIO_ADDR_sockaddr, but returns a non-const. USE WITH CARE, as | |
302 | * it allows you to tamper with the data (and thereby the contents | |
303 | * of the input BIO_ADDR). | |
304 | */ | |
305 | struct sockaddr *BIO_ADDR_sockaddr_noconst(BIO_ADDR *ap) | |
306 | { | |
307 | return &(ap->sa); | |
308 | } | |
309 | ||
310 | /* | |
311 | * BIO_ADDR_sockaddr_size - non-public function that returns the size | |
312 | * of the struct sockaddr the BIO_ADDR is using. If the protocol family | |
313 | * isn't set or is something other than AF_INET, AF_INET6 or AF_UNIX, | |
314 | * the size of the BIO_ADDR type is returned. | |
315 | */ | |
316 | socklen_t BIO_ADDR_sockaddr_size(const BIO_ADDR *ap) | |
317 | { | |
318 | if (ap->sa.sa_family == AF_INET) | |
319 | return sizeof(ap->sin); | |
320 | #ifdef AF_INET6 | |
321 | if (ap->sa.sa_family == AF_INET6) | |
322 | return sizeof(ap->sin6); | |
323 | #endif | |
324 | #ifdef AF_UNIX | |
325 | if (ap->sa.sa_family == AF_UNIX) | |
326 | return sizeof(ap->sun); | |
327 | #endif | |
328 | return sizeof(*ap); | |
329 | } | |
330 | ||
331 | /********************************************************************** | |
332 | * | |
333 | * Address into database | |
334 | * | |
335 | */ | |
336 | ||
337 | const BIO_ADDRINFO *BIO_ADDRINFO_next(const BIO_ADDRINFO *bai) | |
338 | { | |
339 | if (bai != NULL) | |
340 | return bai->bai_next; | |
341 | return NULL; | |
342 | } | |
343 | ||
344 | int BIO_ADDRINFO_family(const BIO_ADDRINFO *bai) | |
345 | { | |
346 | if (bai != NULL) | |
347 | return bai->bai_family; | |
348 | return 0; | |
349 | } | |
350 | ||
351 | int BIO_ADDRINFO_socktype(const BIO_ADDRINFO *bai) | |
352 | { | |
353 | if (bai != NULL) | |
354 | return bai->bai_socktype; | |
355 | return 0; | |
356 | } | |
357 | ||
358 | int BIO_ADDRINFO_protocol(const BIO_ADDRINFO *bai) | |
359 | { | |
360 | if (bai != NULL) | |
361 | return bai->bai_protocol; | |
362 | return 0; | |
363 | } | |
364 | ||
365 | /* | |
366 | * BIO_ADDRINFO_sockaddr_size - non-public function that returns the size | |
367 | * of the struct sockaddr inside the BIO_ADDRINFO. | |
368 | */ | |
369 | socklen_t BIO_ADDRINFO_sockaddr_size(const BIO_ADDRINFO *bai) | |
370 | { | |
371 | if (bai != NULL) | |
372 | return bai->bai_addrlen; | |
373 | return 0; | |
374 | } | |
375 | ||
376 | /* | |
377 | * BIO_ADDRINFO_sockaddr - non-public function that returns bai_addr | |
378 | * as the struct sockaddr it is. | |
379 | */ | |
380 | const struct sockaddr *BIO_ADDRINFO_sockaddr(const BIO_ADDRINFO *bai) | |
381 | { | |
382 | if (bai != NULL) | |
383 | return bai->bai_addr; | |
384 | return NULL; | |
385 | } | |
386 | ||
387 | const BIO_ADDR *BIO_ADDRINFO_address(const BIO_ADDRINFO *bai) | |
388 | { | |
389 | if (bai != NULL) | |
390 | return (BIO_ADDR *)bai->bai_addr; | |
391 | return NULL; | |
392 | } | |
393 | ||
394 | void BIO_ADDRINFO_free(BIO_ADDRINFO *bai) | |
395 | { | |
396 | if (bai == NULL) | |
397 | return; | |
398 | ||
399 | #ifdef AI_PASSIVE | |
400 | # ifdef AF_UNIX | |
401 | # define _cond bai->bai_family != AF_UNIX | |
402 | # else | |
403 | # define _cond 1 | |
404 | # endif | |
405 | if (_cond) { | |
406 | freeaddrinfo(bai); | |
407 | return; | |
408 | } | |
409 | #endif | |
410 | ||
411 | /* Free manually when we know that addrinfo_wrap() was used. | |
412 | * See further comment above addrinfo_wrap() | |
413 | */ | |
414 | while (bai != NULL) { | |
415 | BIO_ADDRINFO *next = bai->bai_next; | |
416 | OPENSSL_free(bai->bai_addr); | |
417 | OPENSSL_free(bai); | |
418 | bai = next; | |
419 | } | |
420 | } | |
421 | ||
422 | /********************************************************************** | |
423 | * | |
424 | * Service functions | |
425 | * | |
426 | */ | |
427 | ||
428 | /*- | |
429 | * The specs in hostserv can take these forms: | |
430 | * | |
431 | * host:service => *host = "host", *service = "service" | |
432 | * host:* => *host = "host", *service = NULL | |
433 | * host: => *host = "host", *service = NULL | |
434 | * :service => *host = NULL, *service = "service" | |
435 | * *:service => *host = NULL, *service = "service" | |
436 | * | |
437 | * in case no : is present in the string, the result depends on | |
438 | * hostserv_prio, as follows: | |
439 | * | |
440 | * when hostserv_prio == BIO_PARSE_PRIO_HOST | |
441 | * host => *host = "host", *service untouched | |
442 | * | |
443 | * when hostserv_prio == BIO_PARSE_PRIO_SERV | |
444 | * service => *host untouched, *service = "service" | |
445 | * | |
446 | */ | |
447 | int BIO_parse_hostserv(const char *hostserv, char **host, char **service, | |
448 | enum BIO_hostserv_priorities hostserv_prio) | |
449 | { | |
450 | const char *h = NULL; size_t hl = 0; | |
451 | const char *p = NULL; size_t pl = 0; | |
452 | ||
453 | if (*hostserv == '[') { | |
454 | if ((p = strchr(hostserv, ']')) == NULL) | |
455 | goto spec_err; | |
456 | h = hostserv + 1; | |
457 | hl = p - h; | |
458 | p++; | |
459 | if (*p == '\0') | |
460 | p = NULL; | |
461 | else if (*p != ':') | |
462 | goto spec_err; | |
463 | else { | |
464 | p++; | |
465 | pl = strlen(p); | |
466 | } | |
467 | } else { | |
468 | const char *p2 = strrchr(hostserv, ':'); | |
469 | p = strchr(hostserv, ':'); | |
470 | ||
471 | /*- | |
472 | * Check for more than one colon. There are three possible | |
473 | * interpretations: | |
474 | * 1. IPv6 address with port number, last colon being separator. | |
475 | * 2. IPv6 address only. | |
476 | * 3. IPv6 address only if hostserv_prio == BIO_PARSE_PRIO_HOST, | |
477 | * IPv6 address and port number if hostserv_prio == BIO_PARSE_PRIO_SERV | |
478 | * Because of this ambiguity, we currently choose to make it an | |
479 | * error. | |
480 | */ | |
481 | if (p != p2) | |
482 | goto amb_err; | |
483 | ||
484 | if (p != NULL) { | |
485 | h = hostserv; | |
486 | hl = p - h; | |
487 | p++; | |
488 | pl = strlen(p); | |
489 | } else if (hostserv_prio == BIO_PARSE_PRIO_HOST) { | |
490 | h = hostserv; | |
491 | hl = strlen(h); | |
492 | } else { | |
493 | p = hostserv; | |
494 | pl = strlen(p); | |
495 | } | |
496 | } | |
497 | ||
498 | if (strchr(p, ':')) | |
499 | goto spec_err; | |
500 | ||
501 | if (h != NULL && host != NULL) { | |
502 | if (hl == 0 | |
503 | || (hl == 1 && h[0] == '*')) { | |
504 | *host = NULL; | |
505 | } else { | |
506 | *host = OPENSSL_strndup(h, hl); | |
507 | if (*host == NULL) | |
508 | goto memerr; | |
509 | } | |
510 | } | |
511 | if (p != NULL && service != NULL) { | |
512 | if (pl == 0 | |
513 | || (pl == 1 && p[0] == '*')) { | |
514 | *service = NULL; | |
515 | } else { | |
516 | *service = OPENSSL_strndup(p, pl); | |
517 | if (*service == NULL) | |
518 | goto memerr; | |
519 | } | |
520 | } | |
521 | ||
522 | return 1; | |
523 | amb_err: | |
524 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_AMBIGUOUS_HOST_OR_SERVICE); | |
525 | return 0; | |
526 | spec_err: | |
527 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_MALFORMED_HOST_OR_SERVICE); | |
528 | return 0; | |
529 | memerr: | |
530 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, ERR_R_MALLOC_FAILURE); | |
531 | return 0; | |
532 | } | |
533 | ||
534 | /* addrinfo_wrap is used to build our own addrinfo "chain". | |
535 | * (it has only one entry, so calling it a chain may be a stretch) | |
536 | * It should ONLY be called when getaddrinfo() and friends | |
537 | * aren't available, OR when dealing with a non IP protocol | |
538 | * family, such as AF_UNIX | |
539 | * | |
540 | * the return value is 1 on success, or 0 on failure, which | |
541 | * only happens if a memory allocation error occured. | |
542 | */ | |
543 | static int addrinfo_wrap(int family, int socktype, | |
544 | const void *where, size_t wherelen, | |
545 | unsigned short port, | |
546 | BIO_ADDRINFO **bai) | |
547 | { | |
548 | OPENSSL_assert(bai != NULL); | |
549 | ||
550 | *bai = (BIO_ADDRINFO *)OPENSSL_zalloc(sizeof(**bai)); | |
551 | ||
552 | if (*bai == NULL) | |
553 | return 0; | |
554 | (*bai)->bai_family = family; | |
555 | (*bai)->bai_socktype = socktype; | |
556 | if (socktype == SOCK_STREAM) | |
557 | (*bai)->bai_protocol = IPPROTO_TCP; | |
558 | if (socktype == SOCK_DGRAM) | |
559 | (*bai)->bai_protocol = IPPROTO_UDP; | |
560 | #ifdef AF_UNIX | |
561 | if (family == AF_UNIX) | |
562 | (*bai)->bai_protocol = 0; | |
563 | #endif | |
564 | { | |
565 | /* Magic: We know that BIO_ADDR_sockaddr_noconst is really | |
566 | just an advanced cast of BIO_ADDR* to struct sockaddr * | |
567 | by the power of union, so while it may seem that we're | |
568 | creating a memory leak here, we are not. It will be | |
569 | all right. */ | |
570 | BIO_ADDR *addr = BIO_ADDR_new(); | |
571 | if (addr != NULL) { | |
572 | BIO_ADDR_rawmake(addr, family, where, wherelen, port); | |
573 | (*bai)->bai_addr = BIO_ADDR_sockaddr_noconst(addr); | |
574 | } | |
575 | } | |
576 | (*bai)->bai_next = NULL; | |
577 | if ((*bai)->bai_addr == NULL) { | |
578 | BIO_ADDRINFO_free(*bai); | |
579 | *bai = NULL; | |
580 | return 0; | |
581 | } | |
582 | return 1; | |
583 | } | |
584 | ||
585 | /*- | |
586 | * BIO_lookup - look up the node and service you want to connect to. | |
587 | * @node: the node you want to connect to. | |
588 | * @service: the service you want to connect to. | |
589 | * @lookup_type: declare intent with the result, client or server. | |
590 | * @family: the address family you want to use. Use AF_UNSPEC for any, or | |
591 | * AF_INET, AF_INET6 or AF_UNIX. | |
592 | * @socktype: The socket type you want to use. Can be SOCK_STREAM, SOCK_DGRAM | |
593 | * or 0 for all. | |
594 | * @res: Storage place for the resulting list of returned addresses | |
595 | * | |
596 | * This will do a lookup of the node and service that you want to connect to. | |
597 | * It returns a linked list of different addresses you can try to connect to. | |
598 | * | |
599 | * When no longer needed you should call BIO_ADDRINFO_free() to free the result. | |
600 | * | |
601 | * The return value is 1 on success or 0 in case of error. | |
602 | */ | |
603 | int BIO_lookup(const char *host, const char *service, | |
604 | enum BIO_lookup_type lookup_type, | |
605 | int family, int socktype, BIO_ADDRINFO **res) | |
606 | { | |
607 | int ret = 0; /* Assume failure */ | |
608 | ||
609 | switch(family) { | |
610 | case AF_INET: | |
611 | #ifdef AF_INET6 | |
612 | case AF_INET6: | |
613 | #endif | |
614 | #ifdef AF_UNIX | |
615 | case AF_UNIX: | |
616 | #endif | |
617 | #ifdef AF_UNSPEC | |
618 | case AF_UNSPEC: | |
619 | #endif | |
620 | break; | |
621 | default: | |
622 | BIOerr(BIO_F_BIO_LOOKUP, BIO_R_UNSUPPORTED_PROTOCOL_FAMILY); | |
623 | return 0; | |
624 | } | |
625 | ||
626 | #ifdef AF_UNIX | |
627 | if (family == AF_UNIX) { | |
628 | if (addrinfo_wrap(family, socktype, host, strlen(host), 0, res)) | |
629 | return 1; | |
630 | else | |
631 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_MALLOC_FAILURE); | |
632 | return 0; | |
633 | } | |
634 | #endif | |
635 | ||
636 | if (1) { | |
637 | #ifdef AI_PASSIVE | |
638 | struct addrinfo hints; | |
639 | ||
640 | hints.ai_flags = 0; | |
641 | # ifdef AI_ADDRCONFIG | |
642 | hints.ai_flags = AI_ADDRCONFIG; | |
643 | # endif | |
644 | hints.ai_family = family; | |
645 | hints.ai_socktype = socktype; | |
646 | hints.ai_protocol = 0; | |
647 | hints.ai_addrlen = 0; | |
648 | hints.ai_addr = NULL; | |
649 | hints.ai_canonname = NULL; | |
650 | hints.ai_next = NULL; | |
651 | ||
652 | if (lookup_type == BIO_LOOKUP_SERVER) | |
653 | hints.ai_flags |= AI_PASSIVE; | |
654 | ||
655 | /* Note that |res| SHOULD be a 'struct addrinfo **' thanks to | |
656 | * macro magic in bio_lcl.h | |
657 | */ | |
658 | switch (getaddrinfo(host, service, &hints, res)) { | |
659 | # ifdef EAI_SYSTEM | |
660 | case EAI_SYSTEM: | |
661 | SYSerr(SYS_F_GETADDRINFO, get_last_socket_error()); | |
662 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); | |
663 | break; | |
664 | # endif | |
665 | case 0: | |
666 | ret = 1; /* Success */ | |
667 | break; | |
668 | default: | |
669 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); | |
670 | ERR_add_error_data(1, gai_strerror(ret)); | |
671 | break; | |
672 | } | |
673 | } else { | |
674 | #endif | |
37e3daf4 | 675 | const struct hostent *he; |
28a0841b RL |
676 | /* Windows doesn't seem to have in_addr_t */ |
677 | #ifdef OPENSSL_SYS_WINDOWS | |
37e3daf4 KR |
678 | static uint32_t he_fallback_address; |
679 | static const uint32_t *he_fallback_addresses[] = | |
680 | { &he_fallback_address, NULL }; | |
28a0841b | 681 | #else |
37e3daf4 KR |
682 | static in_addr_t he_fallback_address; |
683 | static const in_addr_t *he_fallback_addresses[] = | |
684 | { &he_fallback_address, NULL }; | |
28a0841b | 685 | #endif |
37e3daf4 KR |
686 | static const struct hostent he_fallback = |
687 | { NULL, NULL, AF_INET, sizeof(he_fallback_address), | |
688 | (char **)&he_fallback_addresses }; | |
28a0841b RL |
689 | struct servent *se; |
690 | /* Apprently, on WIN64, s_proto and s_port have traded places... */ | |
691 | #ifdef _WIN64 | |
692 | struct servent se_fallback = { NULL, NULL, NULL, 0 }; | |
693 | #else | |
694 | struct servent se_fallback = { NULL, NULL, 0, NULL }; | |
695 | #endif | |
696 | char *proto = NULL; | |
697 | ||
698 | CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME); | |
699 | CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME); | |
37e3daf4 | 700 | he_fallback_address = INADDR_ANY; |
28a0841b RL |
701 | if (host == NULL) { |
702 | he = &he_fallback; | |
703 | switch(lookup_type) { | |
704 | case BIO_LOOKUP_CLIENT: | |
705 | he_fallback_address = INADDR_LOOPBACK; | |
706 | break; | |
707 | case BIO_LOOKUP_SERVER: | |
708 | he_fallback_address = INADDR_ANY; | |
709 | break; | |
710 | default: | |
711 | OPENSSL_assert(("We forgot to handle a lookup type!" == 0)); | |
712 | break; | |
713 | } | |
714 | } else { | |
715 | he = gethostbyname(host); | |
716 | ||
717 | if (he == NULL) { | |
718 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); | |
719 | ERR_add_error_data(1, hstrerror(h_errno)); | |
720 | ret = 0; | |
721 | goto err; | |
722 | } | |
723 | } | |
724 | ||
725 | if (service == NULL) { | |
726 | se_fallback.s_port = 0; | |
727 | se_fallback.s_proto = proto; | |
728 | se = &se_fallback; | |
729 | } else { | |
730 | char *endp = NULL; | |
731 | long portnum = strtol(service, &endp, 10); | |
732 | ||
733 | if (endp != service && *endp == '\0' | |
734 | && portnum > 0 && portnum < 65536) { | |
735 | se_fallback.s_port = htons(portnum); | |
736 | se_fallback.s_proto = proto; | |
737 | se = &se_fallback; | |
738 | } else if (endp == service) { | |
739 | switch (socktype) { | |
740 | case SOCK_STREAM: | |
741 | proto = "tcp"; | |
742 | break; | |
743 | case SOCK_DGRAM: | |
744 | proto = "udp"; | |
745 | break; | |
746 | } | |
747 | se = getservbyname(service, proto); | |
748 | ||
749 | if (se == NULL) { | |
750 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); | |
751 | ERR_add_error_data(1, hstrerror(h_errno)); | |
752 | goto err; | |
753 | } | |
754 | } else { | |
755 | BIOerr(BIO_F_BIO_LOOKUP, BIO_R_MALFORMED_HOST_OR_SERVICE); | |
756 | goto err; | |
757 | } | |
758 | } | |
759 | ||
760 | *res = NULL; | |
761 | ||
762 | { | |
763 | char **addrlistp; | |
764 | size_t addresses; | |
765 | BIO_ADDRINFO *tmp_bai = NULL; | |
766 | ||
767 | /* The easiest way to create a linked list from an | |
768 | array is to start from the back */ | |
769 | for(addrlistp = he->h_addr_list; *addrlistp != NULL; | |
770 | addrlistp++) | |
771 | ; | |
772 | ||
773 | for(addresses = addrlistp - he->h_addr_list; | |
774 | addrlistp--, addresses-- > 0; ) { | |
775 | if (!addrinfo_wrap(he->h_addrtype, socktype, | |
776 | *addrlistp, he->h_length, | |
777 | se->s_port, &tmp_bai)) | |
778 | goto addrinfo_malloc_err; | |
779 | tmp_bai->bai_next = *res; | |
780 | *res = tmp_bai; | |
781 | continue; | |
782 | addrinfo_malloc_err: | |
783 | BIO_ADDRINFO_free(*res); | |
784 | *res = NULL; | |
785 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_MALLOC_FAILURE); | |
786 | ret = 0; | |
787 | goto err; | |
788 | } | |
789 | ||
790 | ret = 1; | |
791 | } | |
792 | err: | |
793 | CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME); | |
794 | CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME); | |
795 | } | |
796 | ||
797 | return ret; | |
798 | } |