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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" | |
58 | ||
59 | #include <openssl/err.h> | |
60 | #include <openssl/buffer.h> | |
d40cf9bc | 61 | #include <ctype.h> |
28a0841b RL |
62 | |
63 | /* | |
64 | * Throughout this file and bio_lcl.h, the existence of the macro | |
65 | * AI_PASSIVE is used to detect the availability of struct addrinfo, | |
66 | * getnameinfo() and getaddrinfo(). If that macro doesn't exist, | |
67 | * we use our own implementation instead, using gethostbyname, | |
68 | * getservbyname and a few other. | |
69 | */ | |
70 | ||
71 | /********************************************************************** | |
72 | * | |
73 | * Address structure | |
74 | * | |
75 | */ | |
76 | ||
77 | BIO_ADDR *BIO_ADDR_new(void) | |
78 | { | |
43ecb9c3 RS |
79 | BIO_ADDR *ret = OPENSSL_zalloc(sizeof(*ret)); |
80 | ||
7d1d48a2 | 81 | ret->sa.sa_family = AF_UNSPEC; |
28a0841b RL |
82 | return ret; |
83 | } | |
84 | ||
85 | void BIO_ADDR_free(BIO_ADDR *ap) | |
86 | { | |
87 | OPENSSL_free(ap); | |
88 | } | |
89 | ||
7d1d48a2 MC |
90 | void BIO_ADDR_clear(BIO_ADDR *ap) |
91 | { | |
92 | memset(ap, 0, sizeof(*ap)); | |
93 | ap->sa.sa_family = AF_UNSPEC; | |
94 | } | |
95 | ||
28a0841b RL |
96 | /* |
97 | * BIO_ADDR_make - non-public routine to fill a BIO_ADDR with the contents | |
98 | * of a struct sockaddr. | |
99 | */ | |
100 | int BIO_ADDR_make(BIO_ADDR *ap, const struct sockaddr *sa) | |
101 | { | |
102 | if (sa->sa_family == AF_INET) { | |
103 | ap->sin = *(const struct sockaddr_in *)sa; | |
104 | return 1; | |
105 | } | |
106 | #ifdef AF_INET6 | |
107 | if (sa->sa_family == AF_INET6) { | |
108 | ap->sin6 = *(const struct sockaddr_in6 *)sa; | |
109 | return 1; | |
110 | } | |
111 | #endif | |
112 | #ifdef AF_UNIX | |
113 | if (ap->sa.sa_family == AF_UNIX) { | |
114 | ap->sun = *(const struct sockaddr_un *)sa; | |
115 | return 1; | |
116 | } | |
117 | #endif | |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
122 | int BIO_ADDR_rawmake(BIO_ADDR *ap, int family, | |
123 | const void *where, size_t wherelen, | |
124 | unsigned short port) | |
125 | { | |
126 | #ifdef AF_UNIX | |
127 | if (family == AF_UNIX) { | |
128 | if (wherelen + 1 > sizeof(ap->sun.sun_path)) | |
129 | return 0; | |
130 | memset(&ap->sun, 0, sizeof(ap->sun)); | |
131 | ap->sun.sun_family = family; | |
132 | strncpy(ap->sun.sun_path, where, sizeof(ap->sun.sun_path) - 1); | |
133 | return 1; | |
134 | } | |
135 | #endif | |
136 | if (family == AF_INET) { | |
137 | if (wherelen != sizeof(struct in_addr)) | |
138 | return 0; | |
139 | memset(&ap->sin, 0, sizeof(ap->sin)); | |
140 | ap->sin.sin_family = family; | |
141 | ap->sin.sin_port = port; | |
142 | ap->sin.sin_addr = *(struct in_addr *)where; | |
143 | return 1; | |
144 | } | |
145 | #ifdef AF_INET6 | |
146 | if (family == AF_INET6) { | |
147 | if (wherelen != sizeof(struct in6_addr)) | |
148 | return 0; | |
149 | memset(&ap->sin6, 0, sizeof(ap->sin6)); | |
150 | ap->sin6.sin6_family = family; | |
151 | ap->sin6.sin6_port = port; | |
152 | ap->sin6.sin6_addr = *(struct in6_addr *)where; | |
153 | return 1; | |
154 | } | |
155 | #endif | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
160 | int BIO_ADDR_family(const BIO_ADDR *ap) | |
161 | { | |
162 | return ap->sa.sa_family; | |
163 | } | |
164 | ||
165 | int BIO_ADDR_rawaddress(const BIO_ADDR *ap, void *p, size_t *l) | |
166 | { | |
167 | size_t len = 0; | |
168 | const void *addrptr = NULL; | |
169 | ||
170 | if (ap->sa.sa_family == AF_INET) { | |
171 | len = sizeof(ap->sin.sin_addr); | |
172 | addrptr = &ap->sin.sin_addr; | |
173 | } | |
174 | #ifdef AF_INET6 | |
175 | else if (ap->sa.sa_family == AF_INET6) { | |
176 | len = sizeof(ap->sin6.sin6_addr); | |
177 | addrptr = &ap->sin6.sin6_addr; | |
178 | } | |
179 | #endif | |
180 | #ifdef AF_UNIX | |
181 | else if (ap->sa.sa_family == AF_UNIX) { | |
182 | len = strlen(ap->sun.sun_path); | |
183 | addrptr = &ap->sun.sun_path; | |
184 | } | |
185 | #endif | |
186 | ||
187 | if (addrptr == NULL) | |
188 | return 0; | |
189 | ||
190 | if (p != NULL) { | |
191 | memcpy(p, addrptr, len); | |
192 | } | |
193 | if (l != NULL) | |
194 | *l = len; | |
195 | ||
196 | return 1; | |
197 | } | |
198 | ||
199 | unsigned short BIO_ADDR_rawport(const BIO_ADDR *ap) | |
200 | { | |
201 | if (ap->sa.sa_family == AF_INET) | |
202 | return ap->sin.sin_port; | |
203 | #ifdef AF_INET6 | |
204 | if (ap->sa.sa_family == AF_INET6) | |
205 | return ap->sin6.sin6_port; | |
206 | #endif | |
207 | return 0; | |
208 | } | |
209 | ||
210 | /*- | |
211 | * addr_strings - helper function to get host and service names | |
212 | * @ap: the BIO_ADDR that has the input info | |
213 | * @numeric: 0 if actual names should be returned, 1 if the numeric | |
214 | * representation should be returned. | |
215 | * @hostname: a pointer to a pointer to a memory area to store the | |
216 | * host name or numeric representation. Unused if NULL. | |
217 | * @service: a pointer to a pointer to a memory area to store the | |
218 | * service name or numeric representation. Unused if NULL. | |
219 | * | |
220 | * The return value is 0 on failure, with the error code in the error | |
221 | * stack, and 1 on success. | |
222 | */ | |
223 | static int addr_strings(const BIO_ADDR *ap, int numeric, | |
224 | char **hostname, char **service) | |
225 | { | |
ed03c461 RL |
226 | if (BIO_sock_init() != 1) |
227 | return 0; | |
228 | ||
28a0841b RL |
229 | if (1) { |
230 | #ifdef AI_PASSIVE | |
231 | int ret = 0; | |
6faffd0a | 232 | char host[NI_MAXHOST] = "", serv[NI_MAXSERV] = ""; |
28a0841b RL |
233 | int flags = 0; |
234 | ||
235 | if (numeric) | |
236 | flags |= NI_NUMERICHOST | NI_NUMERICSERV; | |
237 | ||
238 | if ((ret = getnameinfo(BIO_ADDR_sockaddr(ap), | |
239 | BIO_ADDR_sockaddr_size(ap), | |
240 | host, sizeof(host), serv, sizeof(serv), | |
241 | flags)) != 0) { | |
242 | # ifdef EAI_SYSTEM | |
243 | if (ret == EAI_SYSTEM) { | |
244 | SYSerr(SYS_F_GETNAMEINFO, get_last_socket_error()); | |
245 | BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); | |
246 | } else | |
247 | # endif | |
248 | { | |
249 | BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); | |
250 | ERR_add_error_data(1, gai_strerror(ret)); | |
251 | } | |
252 | return 0; | |
253 | } | |
d40cf9bc | 254 | |
6faffd0a RL |
255 | /* VMS getnameinfo() has a bug, it doesn't fill in serv, which |
256 | * leaves it with whatever garbage that happens to be there. | |
257 | * However, we initialise serv with the empty string (serv[0] | |
258 | * is therefore NUL), so it gets real easy to detect when things | |
259 | * didn't go the way one might expect. | |
d40cf9bc | 260 | */ |
6faffd0a | 261 | if (serv[0] == '\0') { |
d40cf9bc RL |
262 | BIO_snprintf(serv, sizeof(serv), "%d", |
263 | ntohs(BIO_ADDR_rawport(ap))); | |
264 | } | |
265 | ||
28a0841b RL |
266 | if (hostname) |
267 | *hostname = OPENSSL_strdup(host); | |
268 | if (service) | |
269 | *service = OPENSSL_strdup(serv); | |
270 | } else { | |
271 | #endif | |
272 | if (hostname) | |
273 | *hostname = OPENSSL_strdup(inet_ntoa(ap->sin.sin_addr)); | |
274 | if (service) { | |
275 | char serv[6]; /* port is 16 bits => max 5 decimal digits */ | |
276 | BIO_snprintf(serv, sizeof(serv), "%d", ntohs(ap->sin.sin_port)); | |
277 | *service = OPENSSL_strdup(serv); | |
278 | } | |
279 | } | |
280 | ||
281 | return 1; | |
282 | } | |
283 | ||
284 | char *BIO_ADDR_hostname_string(const BIO_ADDR *ap, int numeric) | |
285 | { | |
286 | char *hostname = NULL; | |
287 | ||
288 | if (addr_strings(ap, numeric, &hostname, NULL)) | |
289 | return hostname; | |
290 | ||
291 | return NULL; | |
292 | } | |
293 | ||
294 | char *BIO_ADDR_service_string(const BIO_ADDR *ap, int numeric) | |
295 | { | |
296 | char *service = NULL; | |
297 | ||
298 | if (addr_strings(ap, numeric, NULL, &service)) | |
299 | return service; | |
300 | ||
301 | return NULL; | |
302 | } | |
303 | ||
304 | char *BIO_ADDR_path_string(const BIO_ADDR *ap) | |
305 | { | |
306 | #ifdef AF_UNIX | |
307 | if (ap->sa.sa_family == AF_UNIX) | |
308 | return OPENSSL_strdup(ap->sun.sun_path); | |
309 | #endif | |
310 | return NULL; | |
311 | } | |
312 | ||
313 | /* | |
314 | * BIO_ADDR_sockaddr - non-public routine to return the struct sockaddr | |
315 | * for a given BIO_ADDR. In reality, this is simply a type safe cast. | |
316 | * The returned struct sockaddr is const, so it can't be tampered with. | |
317 | */ | |
318 | const struct sockaddr *BIO_ADDR_sockaddr(const BIO_ADDR *ap) | |
319 | { | |
320 | return &(ap->sa); | |
321 | } | |
322 | ||
323 | /* | |
324 | * BIO_ADDR_sockaddr_noconst - non-public function that does the same | |
325 | * as BIO_ADDR_sockaddr, but returns a non-const. USE WITH CARE, as | |
326 | * it allows you to tamper with the data (and thereby the contents | |
327 | * of the input BIO_ADDR). | |
328 | */ | |
329 | struct sockaddr *BIO_ADDR_sockaddr_noconst(BIO_ADDR *ap) | |
330 | { | |
331 | return &(ap->sa); | |
332 | } | |
333 | ||
334 | /* | |
335 | * BIO_ADDR_sockaddr_size - non-public function that returns the size | |
336 | * of the struct sockaddr the BIO_ADDR is using. If the protocol family | |
337 | * isn't set or is something other than AF_INET, AF_INET6 or AF_UNIX, | |
338 | * the size of the BIO_ADDR type is returned. | |
339 | */ | |
340 | socklen_t BIO_ADDR_sockaddr_size(const BIO_ADDR *ap) | |
341 | { | |
342 | if (ap->sa.sa_family == AF_INET) | |
343 | return sizeof(ap->sin); | |
344 | #ifdef AF_INET6 | |
345 | if (ap->sa.sa_family == AF_INET6) | |
346 | return sizeof(ap->sin6); | |
347 | #endif | |
348 | #ifdef AF_UNIX | |
349 | if (ap->sa.sa_family == AF_UNIX) | |
350 | return sizeof(ap->sun); | |
351 | #endif | |
352 | return sizeof(*ap); | |
353 | } | |
354 | ||
355 | /********************************************************************** | |
356 | * | |
e5a82bfd | 357 | * Address info database |
28a0841b RL |
358 | * |
359 | */ | |
360 | ||
361 | const BIO_ADDRINFO *BIO_ADDRINFO_next(const BIO_ADDRINFO *bai) | |
362 | { | |
363 | if (bai != NULL) | |
364 | return bai->bai_next; | |
365 | return NULL; | |
366 | } | |
367 | ||
368 | int BIO_ADDRINFO_family(const BIO_ADDRINFO *bai) | |
369 | { | |
370 | if (bai != NULL) | |
371 | return bai->bai_family; | |
372 | return 0; | |
373 | } | |
374 | ||
375 | int BIO_ADDRINFO_socktype(const BIO_ADDRINFO *bai) | |
376 | { | |
377 | if (bai != NULL) | |
378 | return bai->bai_socktype; | |
379 | return 0; | |
380 | } | |
381 | ||
382 | int BIO_ADDRINFO_protocol(const BIO_ADDRINFO *bai) | |
383 | { | |
c72fb77f RL |
384 | if (bai != NULL) { |
385 | if (bai->bai_protocol != 0) | |
386 | return bai->bai_protocol; | |
387 | ||
388 | #ifdef AF_UNIX | |
389 | if (bai->bai_family == AF_UNIX) | |
390 | return 0; | |
391 | #endif | |
392 | ||
393 | switch (bai->bai_socktype) { | |
394 | case SOCK_STREAM: | |
395 | return IPPROTO_TCP; | |
396 | case SOCK_DGRAM: | |
397 | return IPPROTO_UDP; | |
398 | default: | |
399 | break; | |
400 | } | |
401 | } | |
28a0841b RL |
402 | return 0; |
403 | } | |
404 | ||
405 | /* | |
406 | * BIO_ADDRINFO_sockaddr_size - non-public function that returns the size | |
407 | * of the struct sockaddr inside the BIO_ADDRINFO. | |
408 | */ | |
409 | socklen_t BIO_ADDRINFO_sockaddr_size(const BIO_ADDRINFO *bai) | |
410 | { | |
411 | if (bai != NULL) | |
412 | return bai->bai_addrlen; | |
413 | return 0; | |
414 | } | |
415 | ||
416 | /* | |
417 | * BIO_ADDRINFO_sockaddr - non-public function that returns bai_addr | |
418 | * as the struct sockaddr it is. | |
419 | */ | |
420 | const struct sockaddr *BIO_ADDRINFO_sockaddr(const BIO_ADDRINFO *bai) | |
421 | { | |
422 | if (bai != NULL) | |
423 | return bai->bai_addr; | |
424 | return NULL; | |
425 | } | |
426 | ||
427 | const BIO_ADDR *BIO_ADDRINFO_address(const BIO_ADDRINFO *bai) | |
428 | { | |
429 | if (bai != NULL) | |
430 | return (BIO_ADDR *)bai->bai_addr; | |
431 | return NULL; | |
432 | } | |
433 | ||
434 | void BIO_ADDRINFO_free(BIO_ADDRINFO *bai) | |
435 | { | |
436 | if (bai == NULL) | |
437 | return; | |
438 | ||
439 | #ifdef AI_PASSIVE | |
440 | # ifdef AF_UNIX | |
441 | # define _cond bai->bai_family != AF_UNIX | |
442 | # else | |
443 | # define _cond 1 | |
444 | # endif | |
445 | if (_cond) { | |
446 | freeaddrinfo(bai); | |
447 | return; | |
448 | } | |
449 | #endif | |
450 | ||
451 | /* Free manually when we know that addrinfo_wrap() was used. | |
452 | * See further comment above addrinfo_wrap() | |
453 | */ | |
454 | while (bai != NULL) { | |
455 | BIO_ADDRINFO *next = bai->bai_next; | |
456 | OPENSSL_free(bai->bai_addr); | |
457 | OPENSSL_free(bai); | |
458 | bai = next; | |
459 | } | |
460 | } | |
461 | ||
462 | /********************************************************************** | |
463 | * | |
464 | * Service functions | |
465 | * | |
466 | */ | |
467 | ||
468 | /*- | |
469 | * The specs in hostserv can take these forms: | |
470 | * | |
471 | * host:service => *host = "host", *service = "service" | |
472 | * host:* => *host = "host", *service = NULL | |
473 | * host: => *host = "host", *service = NULL | |
474 | * :service => *host = NULL, *service = "service" | |
475 | * *:service => *host = NULL, *service = "service" | |
476 | * | |
477 | * in case no : is present in the string, the result depends on | |
478 | * hostserv_prio, as follows: | |
479 | * | |
480 | * when hostserv_prio == BIO_PARSE_PRIO_HOST | |
481 | * host => *host = "host", *service untouched | |
482 | * | |
483 | * when hostserv_prio == BIO_PARSE_PRIO_SERV | |
484 | * service => *host untouched, *service = "service" | |
485 | * | |
486 | */ | |
487 | int BIO_parse_hostserv(const char *hostserv, char **host, char **service, | |
488 | enum BIO_hostserv_priorities hostserv_prio) | |
489 | { | |
490 | const char *h = NULL; size_t hl = 0; | |
491 | const char *p = NULL; size_t pl = 0; | |
492 | ||
493 | if (*hostserv == '[') { | |
494 | if ((p = strchr(hostserv, ']')) == NULL) | |
495 | goto spec_err; | |
496 | h = hostserv + 1; | |
497 | hl = p - h; | |
498 | p++; | |
499 | if (*p == '\0') | |
500 | p = NULL; | |
501 | else if (*p != ':') | |
502 | goto spec_err; | |
503 | else { | |
504 | p++; | |
505 | pl = strlen(p); | |
506 | } | |
507 | } else { | |
508 | const char *p2 = strrchr(hostserv, ':'); | |
509 | p = strchr(hostserv, ':'); | |
510 | ||
511 | /*- | |
512 | * Check for more than one colon. There are three possible | |
513 | * interpretations: | |
514 | * 1. IPv6 address with port number, last colon being separator. | |
515 | * 2. IPv6 address only. | |
516 | * 3. IPv6 address only if hostserv_prio == BIO_PARSE_PRIO_HOST, | |
517 | * IPv6 address and port number if hostserv_prio == BIO_PARSE_PRIO_SERV | |
518 | * Because of this ambiguity, we currently choose to make it an | |
519 | * error. | |
520 | */ | |
521 | if (p != p2) | |
522 | goto amb_err; | |
523 | ||
524 | if (p != NULL) { | |
525 | h = hostserv; | |
526 | hl = p - h; | |
527 | p++; | |
528 | pl = strlen(p); | |
529 | } else if (hostserv_prio == BIO_PARSE_PRIO_HOST) { | |
530 | h = hostserv; | |
531 | hl = strlen(h); | |
532 | } else { | |
533 | p = hostserv; | |
534 | pl = strlen(p); | |
535 | } | |
536 | } | |
537 | ||
80926502 | 538 | if (p != NULL && strchr(p, ':')) |
28a0841b RL |
539 | goto spec_err; |
540 | ||
541 | if (h != NULL && host != NULL) { | |
542 | if (hl == 0 | |
543 | || (hl == 1 && h[0] == '*')) { | |
544 | *host = NULL; | |
545 | } else { | |
546 | *host = OPENSSL_strndup(h, hl); | |
547 | if (*host == NULL) | |
548 | goto memerr; | |
549 | } | |
550 | } | |
551 | if (p != NULL && service != NULL) { | |
552 | if (pl == 0 | |
553 | || (pl == 1 && p[0] == '*')) { | |
554 | *service = NULL; | |
555 | } else { | |
556 | *service = OPENSSL_strndup(p, pl); | |
557 | if (*service == NULL) | |
558 | goto memerr; | |
559 | } | |
560 | } | |
561 | ||
562 | return 1; | |
563 | amb_err: | |
564 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_AMBIGUOUS_HOST_OR_SERVICE); | |
565 | return 0; | |
566 | spec_err: | |
567 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_MALFORMED_HOST_OR_SERVICE); | |
568 | return 0; | |
569 | memerr: | |
570 | BIOerr(BIO_F_BIO_PARSE_HOSTSERV, ERR_R_MALLOC_FAILURE); | |
571 | return 0; | |
572 | } | |
573 | ||
574 | /* addrinfo_wrap is used to build our own addrinfo "chain". | |
575 | * (it has only one entry, so calling it a chain may be a stretch) | |
576 | * It should ONLY be called when getaddrinfo() and friends | |
577 | * aren't available, OR when dealing with a non IP protocol | |
578 | * family, such as AF_UNIX | |
579 | * | |
580 | * the return value is 1 on success, or 0 on failure, which | |
581 | * only happens if a memory allocation error occured. | |
582 | */ | |
583 | static int addrinfo_wrap(int family, int socktype, | |
584 | const void *where, size_t wherelen, | |
585 | unsigned short port, | |
586 | BIO_ADDRINFO **bai) | |
587 | { | |
588 | OPENSSL_assert(bai != NULL); | |
589 | ||
43ecb9c3 | 590 | *bai = OPENSSL_zalloc(sizeof(**bai)); |
28a0841b RL |
591 | if (*bai == NULL) |
592 | return 0; | |
43ecb9c3 | 593 | |
28a0841b RL |
594 | (*bai)->bai_family = family; |
595 | (*bai)->bai_socktype = socktype; | |
596 | if (socktype == SOCK_STREAM) | |
597 | (*bai)->bai_protocol = IPPROTO_TCP; | |
598 | if (socktype == SOCK_DGRAM) | |
599 | (*bai)->bai_protocol = IPPROTO_UDP; | |
600 | #ifdef AF_UNIX | |
601 | if (family == AF_UNIX) | |
602 | (*bai)->bai_protocol = 0; | |
603 | #endif | |
604 | { | |
605 | /* Magic: We know that BIO_ADDR_sockaddr_noconst is really | |
606 | just an advanced cast of BIO_ADDR* to struct sockaddr * | |
607 | by the power of union, so while it may seem that we're | |
608 | creating a memory leak here, we are not. It will be | |
609 | all right. */ | |
610 | BIO_ADDR *addr = BIO_ADDR_new(); | |
611 | if (addr != NULL) { | |
612 | BIO_ADDR_rawmake(addr, family, where, wherelen, port); | |
613 | (*bai)->bai_addr = BIO_ADDR_sockaddr_noconst(addr); | |
614 | } | |
615 | } | |
616 | (*bai)->bai_next = NULL; | |
617 | if ((*bai)->bai_addr == NULL) { | |
618 | BIO_ADDRINFO_free(*bai); | |
619 | *bai = NULL; | |
620 | return 0; | |
621 | } | |
622 | return 1; | |
623 | } | |
624 | ||
625 | /*- | |
626 | * BIO_lookup - look up the node and service you want to connect to. | |
627 | * @node: the node you want to connect to. | |
628 | * @service: the service you want to connect to. | |
629 | * @lookup_type: declare intent with the result, client or server. | |
630 | * @family: the address family you want to use. Use AF_UNSPEC for any, or | |
631 | * AF_INET, AF_INET6 or AF_UNIX. | |
632 | * @socktype: The socket type you want to use. Can be SOCK_STREAM, SOCK_DGRAM | |
633 | * or 0 for all. | |
634 | * @res: Storage place for the resulting list of returned addresses | |
635 | * | |
636 | * This will do a lookup of the node and service that you want to connect to. | |
637 | * It returns a linked list of different addresses you can try to connect to. | |
638 | * | |
639 | * When no longer needed you should call BIO_ADDRINFO_free() to free the result. | |
640 | * | |
641 | * The return value is 1 on success or 0 in case of error. | |
642 | */ | |
643 | int BIO_lookup(const char *host, const char *service, | |
644 | enum BIO_lookup_type lookup_type, | |
645 | int family, int socktype, BIO_ADDRINFO **res) | |
646 | { | |
647 | int ret = 0; /* Assume failure */ | |
648 | ||
649 | switch(family) { | |
650 | case AF_INET: | |
651 | #ifdef AF_INET6 | |
652 | case AF_INET6: | |
653 | #endif | |
654 | #ifdef AF_UNIX | |
655 | case AF_UNIX: | |
656 | #endif | |
657 | #ifdef AF_UNSPEC | |
658 | case AF_UNSPEC: | |
659 | #endif | |
660 | break; | |
661 | default: | |
662 | BIOerr(BIO_F_BIO_LOOKUP, BIO_R_UNSUPPORTED_PROTOCOL_FAMILY); | |
663 | return 0; | |
664 | } | |
665 | ||
666 | #ifdef AF_UNIX | |
667 | if (family == AF_UNIX) { | |
668 | if (addrinfo_wrap(family, socktype, host, strlen(host), 0, res)) | |
669 | return 1; | |
670 | else | |
671 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_MALLOC_FAILURE); | |
672 | return 0; | |
673 | } | |
674 | #endif | |
675 | ||
ed03c461 RL |
676 | if (BIO_sock_init() != 1) |
677 | return 0; | |
678 | ||
28a0841b | 679 | if (1) { |
ed03c461 | 680 | int gai_ret = 0; |
28a0841b RL |
681 | #ifdef AI_PASSIVE |
682 | struct addrinfo hints; | |
683 | ||
684 | hints.ai_flags = 0; | |
685 | # ifdef AI_ADDRCONFIG | |
686 | hints.ai_flags = AI_ADDRCONFIG; | |
687 | # endif | |
688 | hints.ai_family = family; | |
689 | hints.ai_socktype = socktype; | |
690 | hints.ai_protocol = 0; | |
691 | hints.ai_addrlen = 0; | |
692 | hints.ai_addr = NULL; | |
693 | hints.ai_canonname = NULL; | |
694 | hints.ai_next = NULL; | |
695 | ||
696 | if (lookup_type == BIO_LOOKUP_SERVER) | |
697 | hints.ai_flags |= AI_PASSIVE; | |
698 | ||
699 | /* Note that |res| SHOULD be a 'struct addrinfo **' thanks to | |
700 | * macro magic in bio_lcl.h | |
701 | */ | |
ed03c461 | 702 | switch ((gai_ret = getaddrinfo(host, service, &hints, res))) { |
28a0841b RL |
703 | # ifdef EAI_SYSTEM |
704 | case EAI_SYSTEM: | |
705 | SYSerr(SYS_F_GETADDRINFO, get_last_socket_error()); | |
706 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); | |
707 | break; | |
708 | # endif | |
709 | case 0: | |
710 | ret = 1; /* Success */ | |
711 | break; | |
712 | default: | |
713 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); | |
ed03c461 | 714 | ERR_add_error_data(1, gai_strerror(gai_ret)); |
28a0841b RL |
715 | break; |
716 | } | |
717 | } else { | |
718 | #endif | |
37e3daf4 | 719 | const struct hostent *he; |
28a0841b RL |
720 | /* Windows doesn't seem to have in_addr_t */ |
721 | #ifdef OPENSSL_SYS_WINDOWS | |
37e3daf4 KR |
722 | static uint32_t he_fallback_address; |
723 | static const uint32_t *he_fallback_addresses[] = | |
724 | { &he_fallback_address, NULL }; | |
28a0841b | 725 | #else |
37e3daf4 KR |
726 | static in_addr_t he_fallback_address; |
727 | static const in_addr_t *he_fallback_addresses[] = | |
728 | { &he_fallback_address, NULL }; | |
28a0841b | 729 | #endif |
37e3daf4 KR |
730 | static const struct hostent he_fallback = |
731 | { NULL, NULL, AF_INET, sizeof(he_fallback_address), | |
732 | (char **)&he_fallback_addresses }; | |
28a0841b RL |
733 | struct servent *se; |
734 | /* Apprently, on WIN64, s_proto and s_port have traded places... */ | |
735 | #ifdef _WIN64 | |
736 | struct servent se_fallback = { NULL, NULL, NULL, 0 }; | |
737 | #else | |
738 | struct servent se_fallback = { NULL, NULL, 0, NULL }; | |
739 | #endif | |
740 | char *proto = NULL; | |
741 | ||
742 | CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME); | |
743 | CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME); | |
37e3daf4 | 744 | he_fallback_address = INADDR_ANY; |
28a0841b RL |
745 | if (host == NULL) { |
746 | he = &he_fallback; | |
747 | switch(lookup_type) { | |
748 | case BIO_LOOKUP_CLIENT: | |
749 | he_fallback_address = INADDR_LOOPBACK; | |
750 | break; | |
751 | case BIO_LOOKUP_SERVER: | |
752 | he_fallback_address = INADDR_ANY; | |
753 | break; | |
754 | default: | |
755 | OPENSSL_assert(("We forgot to handle a lookup type!" == 0)); | |
756 | break; | |
757 | } | |
758 | } else { | |
759 | he = gethostbyname(host); | |
760 | ||
761 | if (he == NULL) { | |
c86d1f19 | 762 | #ifndef OPENSSL_SYS_WINDOWS |
28a0841b RL |
763 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); |
764 | ERR_add_error_data(1, hstrerror(h_errno)); | |
c86d1f19 KR |
765 | #else |
766 | SYSerr(SYS_F_GETHOSTBYNAME, WSAGetLastError()); | |
767 | #endif | |
28a0841b RL |
768 | ret = 0; |
769 | goto err; | |
770 | } | |
771 | } | |
772 | ||
773 | if (service == NULL) { | |
774 | se_fallback.s_port = 0; | |
775 | se_fallback.s_proto = proto; | |
776 | se = &se_fallback; | |
777 | } else { | |
778 | char *endp = NULL; | |
779 | long portnum = strtol(service, &endp, 10); | |
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) { | |
787 | switch (socktype) { | |
788 | case SOCK_STREAM: | |
789 | proto = "tcp"; | |
790 | break; | |
791 | case SOCK_DGRAM: | |
792 | proto = "udp"; | |
793 | break; | |
794 | } | |
795 | se = getservbyname(service, proto); | |
796 | ||
797 | if (se == NULL) { | |
c86d1f19 | 798 | #ifndef OPENSSL_SYS_WINDOWS |
28a0841b RL |
799 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB); |
800 | ERR_add_error_data(1, hstrerror(h_errno)); | |
c86d1f19 KR |
801 | #else |
802 | SYSerr(SYS_F_GETSERVBYNAME, WSAGetLastError()); | |
803 | #endif | |
28a0841b RL |
804 | goto err; |
805 | } | |
806 | } else { | |
807 | BIOerr(BIO_F_BIO_LOOKUP, BIO_R_MALFORMED_HOST_OR_SERVICE); | |
808 | goto err; | |
809 | } | |
810 | } | |
811 | ||
812 | *res = NULL; | |
813 | ||
814 | { | |
815 | char **addrlistp; | |
816 | size_t addresses; | |
817 | BIO_ADDRINFO *tmp_bai = NULL; | |
818 | ||
819 | /* The easiest way to create a linked list from an | |
820 | array is to start from the back */ | |
821 | for(addrlistp = he->h_addr_list; *addrlistp != NULL; | |
822 | addrlistp++) | |
823 | ; | |
824 | ||
825 | for(addresses = addrlistp - he->h_addr_list; | |
826 | addrlistp--, addresses-- > 0; ) { | |
827 | if (!addrinfo_wrap(he->h_addrtype, socktype, | |
828 | *addrlistp, he->h_length, | |
829 | se->s_port, &tmp_bai)) | |
830 | goto addrinfo_malloc_err; | |
831 | tmp_bai->bai_next = *res; | |
832 | *res = tmp_bai; | |
833 | continue; | |
834 | addrinfo_malloc_err: | |
835 | BIO_ADDRINFO_free(*res); | |
836 | *res = NULL; | |
837 | BIOerr(BIO_F_BIO_LOOKUP, ERR_R_MALLOC_FAILURE); | |
838 | ret = 0; | |
839 | goto err; | |
840 | } | |
841 | ||
842 | ret = 1; | |
843 | } | |
844 | err: | |
845 | CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME); | |
846 | CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME); | |
847 | } | |
848 | ||
849 | return ret; | |
850 | } |