1 /*
2 * Copyright 2016-2024 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #ifndef _GNU_SOURCE
11 # define _GNU_SOURCE
12 #endif
13
14 /*
15 * VC configurations may define UNICODE, to indicate to the C RTL that
16 * WCHAR functions are preferred.
17 * This affects functions like gai_strerror(), which is implemented as
18 * an alias macro for gai_strerrorA() (which returns a const char *) or
19 * gai_strerrorW() (which returns a const WCHAR *). This source file
20 * assumes POSIX declarations, so prefer the non-UNICODE definitions.
21 */
22 #undef UNICODE
23
24 #include <assert.h>
25 #include <string.h>
26
27 #include "bio_local.h"
28 #include <openssl/crypto.h>
29
30 #ifndef OPENSSL_NO_SOCK
31 #include <openssl/err.h>
32 #include <openssl/buffer.h>
33 #include "internal/thread_once.h"
34
35 CRYPTO_RWLOCK *bio_lookup_lock;
36 static CRYPTO_ONCE bio_lookup_init = CRYPTO_ONCE_STATIC_INIT;
37
38 /*
39 * Throughout this file and bio_local.h, the existence of the macro
40 * AI_PASSIVE is used to detect the availability of struct addrinfo,
41 * getnameinfo() and getaddrinfo(). If that macro doesn't exist,
42 * we use our own implementation instead, using gethostbyname,
43 * getservbyname and a few other.
44 */
45
46 /**********************************************************************
47 *
48 * Address structure
49 *
50 */
51
BIO_ADDR_new(void)52 BIO_ADDR *BIO_ADDR_new(void)
53 {
54 BIO_ADDR *ret = OPENSSL_zalloc(sizeof(*ret));
55
56 if (ret == NULL) {
57 ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE);
58 return NULL;
59 }
60
61 ret->sa.sa_family = AF_UNSPEC;
62 return ret;
63 }
64
BIO_ADDR_free(BIO_ADDR * ap)65 void BIO_ADDR_free(BIO_ADDR *ap)
66 {
67 OPENSSL_free(ap);
68 }
69
BIO_ADDR_clear(BIO_ADDR * ap)70 void BIO_ADDR_clear(BIO_ADDR *ap)
71 {
72 memset(ap, 0, sizeof(*ap));
73 ap->sa.sa_family = AF_UNSPEC;
74 }
75
76 /*
77 * BIO_ADDR_make - non-public routine to fill a BIO_ADDR with the contents
78 * of a struct sockaddr.
79 */
BIO_ADDR_make(BIO_ADDR * ap,const struct sockaddr * sa)80 int BIO_ADDR_make(BIO_ADDR *ap, const struct sockaddr *sa)
81 {
82 if (sa->sa_family == AF_INET) {
83 memcpy(&(ap->s_in), sa, sizeof(struct sockaddr_in));
84 return 1;
85 }
86 #ifdef AF_INET6
87 if (sa->sa_family == AF_INET6) {
88 memcpy(&(ap->s_in6), sa, sizeof(struct sockaddr_in6));
89 return 1;
90 }
91 #endif
92 #ifdef AF_UNIX
93 if (sa->sa_family == AF_UNIX) {
94 memcpy(&(ap->s_un), sa, sizeof(struct sockaddr_un));
95 return 1;
96 }
97 #endif
98
99 return 0;
100 }
101
BIO_ADDR_rawmake(BIO_ADDR * ap,int family,const void * where,size_t wherelen,unsigned short port)102 int BIO_ADDR_rawmake(BIO_ADDR *ap, int family,
103 const void *where, size_t wherelen,
104 unsigned short port)
105 {
106 #ifdef AF_UNIX
107 if (family == AF_UNIX) {
108 if (wherelen + 1 > sizeof(ap->s_un.sun_path))
109 return 0;
110 memset(&ap->s_un, 0, sizeof(ap->s_un));
111 ap->s_un.sun_family = family;
112 strncpy(ap->s_un.sun_path, where, sizeof(ap->s_un.sun_path) - 1);
113 return 1;
114 }
115 #endif
116 if (family == AF_INET) {
117 if (wherelen != sizeof(struct in_addr))
118 return 0;
119 memset(&ap->s_in, 0, sizeof(ap->s_in));
120 ap->s_in.sin_family = family;
121 ap->s_in.sin_port = port;
122 ap->s_in.sin_addr = *(struct in_addr *)where;
123 return 1;
124 }
125 #ifdef AF_INET6
126 if (family == AF_INET6) {
127 if (wherelen != sizeof(struct in6_addr))
128 return 0;
129 memset(&ap->s_in6, 0, sizeof(ap->s_in6));
130 ap->s_in6.sin6_family = family;
131 ap->s_in6.sin6_port = port;
132 ap->s_in6.sin6_addr = *(struct in6_addr *)where;
133 return 1;
134 }
135 #endif
136
137 return 0;
138 }
139
BIO_ADDR_family(const BIO_ADDR * ap)140 int BIO_ADDR_family(const BIO_ADDR *ap)
141 {
142 return ap->sa.sa_family;
143 }
144
BIO_ADDR_rawaddress(const BIO_ADDR * ap,void * p,size_t * l)145 int BIO_ADDR_rawaddress(const BIO_ADDR *ap, void *p, size_t *l)
146 {
147 size_t len = 0;
148 const void *addrptr = NULL;
149
150 if (ap->sa.sa_family == AF_INET) {
151 len = sizeof(ap->s_in.sin_addr);
152 addrptr = &ap->s_in.sin_addr;
153 }
154 #ifdef AF_INET6
155 else if (ap->sa.sa_family == AF_INET6) {
156 len = sizeof(ap->s_in6.sin6_addr);
157 addrptr = &ap->s_in6.sin6_addr;
158 }
159 #endif
160 #ifdef AF_UNIX
161 else if (ap->sa.sa_family == AF_UNIX) {
162 len = strlen(ap->s_un.sun_path);
163 addrptr = &ap->s_un.sun_path;
164 }
165 #endif
166
167 if (addrptr == NULL)
168 return 0;
169
170 if (p != NULL) {
171 memcpy(p, addrptr, len);
172 }
173 if (l != NULL)
174 *l = len;
175
176 return 1;
177 }
178
BIO_ADDR_rawport(const BIO_ADDR * ap)179 unsigned short BIO_ADDR_rawport(const BIO_ADDR *ap)
180 {
181 if (ap->sa.sa_family == AF_INET)
182 return ap->s_in.sin_port;
183 #ifdef AF_INET6
184 if (ap->sa.sa_family == AF_INET6)
185 return ap->s_in6.sin6_port;
186 #endif
187 return 0;
188 }
189
190 /*-
191 * addr_strings - helper function to get host and service names
192 * @ap: the BIO_ADDR that has the input info
193 * @numeric: 0 if actual names should be returned, 1 if the numeric
194 * representation should be returned.
195 * @hostname: a pointer to a pointer to a memory area to store the
196 * host name or numeric representation. Unused if NULL.
197 * @service: a pointer to a pointer to a memory area to store the
198 * service name or numeric representation. Unused if NULL.
199 *
200 * The return value is 0 on failure, with the error code in the error
201 * stack, and 1 on success.
202 */
addr_strings(const BIO_ADDR * ap,int numeric,char ** hostname,char ** service)203 static int addr_strings(const BIO_ADDR *ap, int numeric,
204 char **hostname, char **service)
205 {
206 if (BIO_sock_init() != 1)
207 return 0;
208
209 if (1) {
210 #ifdef AI_PASSIVE
211 int ret = 0;
212 char host[NI_MAXHOST] = "", serv[NI_MAXSERV] = "";
213 int flags = 0;
214
215 if (numeric)
216 flags |= NI_NUMERICHOST | NI_NUMERICSERV;
217
218 if ((ret = getnameinfo(BIO_ADDR_sockaddr(ap),
219 BIO_ADDR_sockaddr_size(ap),
220 host, sizeof(host), serv, sizeof(serv),
221 flags)) != 0) {
222 # ifdef EAI_SYSTEM
223 if (ret == EAI_SYSTEM) {
224 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
225 "calling getnameinfo()");
226 } else
227 # endif
228 {
229 ERR_raise_data(ERR_LIB_BIO, ERR_R_SYS_LIB, gai_strerror(ret));
230 }
231 return 0;
232 }
233
234 /* VMS getnameinfo() has a bug, it doesn't fill in serv, which
235 * leaves it with whatever garbage that happens to be there.
236 * However, we initialise serv with the empty string (serv[0]
237 * is therefore NUL), so it gets real easy to detect when things
238 * didn't go the way one might expect.
239 */
240 if (serv[0] == '\0') {
241 BIO_snprintf(serv, sizeof(serv), "%d",
242 ntohs(BIO_ADDR_rawport(ap)));
243 }
244
245 if (hostname != NULL)
246 *hostname = OPENSSL_strdup(host);
247 if (service != NULL)
248 *service = OPENSSL_strdup(serv);
249 } else {
250 #endif
251 if (hostname != NULL)
252 *hostname = OPENSSL_strdup(inet_ntoa(ap->s_in.sin_addr));
253 if (service != NULL) {
254 char serv[6]; /* port is 16 bits => max 5 decimal digits */
255 BIO_snprintf(serv, sizeof(serv), "%d", ntohs(ap->s_in.sin_port));
256 *service = OPENSSL_strdup(serv);
257 }
258 }
259
260 if ((hostname != NULL && *hostname == NULL)
261 || (service != NULL && *service == NULL)) {
262 if (hostname != NULL) {
263 OPENSSL_free(*hostname);
264 *hostname = NULL;
265 }
266 if (service != NULL) {
267 OPENSSL_free(*service);
268 *service = NULL;
269 }
270 ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE);
271 return 0;
272 }
273
274 return 1;
275 }
276
BIO_ADDR_hostname_string(const BIO_ADDR * ap,int numeric)277 char *BIO_ADDR_hostname_string(const BIO_ADDR *ap, int numeric)
278 {
279 char *hostname = NULL;
280
281 if (addr_strings(ap, numeric, &hostname, NULL))
282 return hostname;
283
284 return NULL;
285 }
286
BIO_ADDR_service_string(const BIO_ADDR * ap,int numeric)287 char *BIO_ADDR_service_string(const BIO_ADDR *ap, int numeric)
288 {
289 char *service = NULL;
290
291 if (addr_strings(ap, numeric, NULL, &service))
292 return service;
293
294 return NULL;
295 }
296
BIO_ADDR_path_string(const BIO_ADDR * ap)297 char *BIO_ADDR_path_string(const BIO_ADDR *ap)
298 {
299 #ifdef AF_UNIX
300 if (ap->sa.sa_family == AF_UNIX)
301 return OPENSSL_strdup(ap->s_un.sun_path);
302 #endif
303 return NULL;
304 }
305
306 /*
307 * BIO_ADDR_sockaddr - non-public routine to return the struct sockaddr
308 * for a given BIO_ADDR. In reality, this is simply a type safe cast.
309 * The returned struct sockaddr is const, so it can't be tampered with.
310 */
BIO_ADDR_sockaddr(const BIO_ADDR * ap)311 const struct sockaddr *BIO_ADDR_sockaddr(const BIO_ADDR *ap)
312 {
313 return &(ap->sa);
314 }
315
316 /*
317 * BIO_ADDR_sockaddr_noconst - non-public function that does the same
318 * as BIO_ADDR_sockaddr, but returns a non-const. USE WITH CARE, as
319 * it allows you to tamper with the data (and thereby the contents
320 * of the input BIO_ADDR).
321 */
BIO_ADDR_sockaddr_noconst(BIO_ADDR * ap)322 struct sockaddr *BIO_ADDR_sockaddr_noconst(BIO_ADDR *ap)
323 {
324 return &(ap->sa);
325 }
326
327 /*
328 * BIO_ADDR_sockaddr_size - non-public function that returns the size
329 * of the struct sockaddr the BIO_ADDR is using. If the protocol family
330 * isn't set or is something other than AF_INET, AF_INET6 or AF_UNIX,
331 * the size of the BIO_ADDR type is returned.
332 */
BIO_ADDR_sockaddr_size(const BIO_ADDR * ap)333 socklen_t BIO_ADDR_sockaddr_size(const BIO_ADDR *ap)
334 {
335 if (ap->sa.sa_family == AF_INET)
336 return sizeof(ap->s_in);
337 #ifdef AF_INET6
338 if (ap->sa.sa_family == AF_INET6)
339 return sizeof(ap->s_in6);
340 #endif
341 #ifdef AF_UNIX
342 if (ap->sa.sa_family == AF_UNIX)
343 return sizeof(ap->s_un);
344 #endif
345 return sizeof(*ap);
346 }
347
348 /**********************************************************************
349 *
350 * Address info database
351 *
352 */
353
BIO_ADDRINFO_next(const BIO_ADDRINFO * bai)354 const BIO_ADDRINFO *BIO_ADDRINFO_next(const BIO_ADDRINFO *bai)
355 {
356 if (bai != NULL)
357 return bai->bai_next;
358 return NULL;
359 }
360
BIO_ADDRINFO_family(const BIO_ADDRINFO * bai)361 int BIO_ADDRINFO_family(const BIO_ADDRINFO *bai)
362 {
363 if (bai != NULL)
364 return bai->bai_family;
365 return 0;
366 }
367
BIO_ADDRINFO_socktype(const BIO_ADDRINFO * bai)368 int BIO_ADDRINFO_socktype(const BIO_ADDRINFO *bai)
369 {
370 if (bai != NULL)
371 return bai->bai_socktype;
372 return 0;
373 }
374
BIO_ADDRINFO_protocol(const BIO_ADDRINFO * bai)375 int BIO_ADDRINFO_protocol(const BIO_ADDRINFO *bai)
376 {
377 if (bai != NULL) {
378 if (bai->bai_protocol != 0)
379 return bai->bai_protocol;
380
381 #ifdef AF_UNIX
382 if (bai->bai_family == AF_UNIX)
383 return 0;
384 #endif
385
386 switch (bai->bai_socktype) {
387 case SOCK_STREAM:
388 return IPPROTO_TCP;
389 case SOCK_DGRAM:
390 return IPPROTO_UDP;
391 default:
392 break;
393 }
394 }
395 return 0;
396 }
397
398 /*
399 * BIO_ADDRINFO_sockaddr_size - non-public function that returns the size
400 * of the struct sockaddr inside the BIO_ADDRINFO.
401 */
BIO_ADDRINFO_sockaddr_size(const BIO_ADDRINFO * bai)402 socklen_t BIO_ADDRINFO_sockaddr_size(const BIO_ADDRINFO *bai)
403 {
404 if (bai != NULL)
405 return bai->bai_addrlen;
406 return 0;
407 }
408
409 /*
410 * BIO_ADDRINFO_sockaddr - non-public function that returns bai_addr
411 * as the struct sockaddr it is.
412 */
BIO_ADDRINFO_sockaddr(const BIO_ADDRINFO * bai)413 const struct sockaddr *BIO_ADDRINFO_sockaddr(const BIO_ADDRINFO *bai)
414 {
415 if (bai != NULL)
416 return bai->bai_addr;
417 return NULL;
418 }
419
BIO_ADDRINFO_address(const BIO_ADDRINFO * bai)420 const BIO_ADDR *BIO_ADDRINFO_address(const BIO_ADDRINFO *bai)
421 {
422 if (bai != NULL)
423 return (BIO_ADDR *)bai->bai_addr;
424 return NULL;
425 }
426
BIO_ADDRINFO_free(BIO_ADDRINFO * bai)427 void BIO_ADDRINFO_free(BIO_ADDRINFO *bai)
428 {
429 if (bai == NULL)
430 return;
431
432 #ifdef AI_PASSIVE
433 # ifdef AF_UNIX
434 # define _cond bai->bai_family != AF_UNIX
435 # else
436 # define _cond 1
437 # endif
438 if (_cond) {
439 freeaddrinfo(bai);
440 return;
441 }
442 #endif
443
444 /* Free manually when we know that addrinfo_wrap() was used.
445 * See further comment above addrinfo_wrap()
446 */
447 while (bai != NULL) {
448 BIO_ADDRINFO *next = bai->bai_next;
449 OPENSSL_free(bai->bai_addr);
450 OPENSSL_free(bai);
451 bai = next;
452 }
453 }
454
455 /**********************************************************************
456 *
457 * Service functions
458 *
459 */
460
461 /*-
462 * The specs in hostserv can take these forms:
463 *
464 * host:service => *host = "host", *service = "service"
465 * host:* => *host = "host", *service = NULL
466 * host: => *host = "host", *service = NULL
467 * :service => *host = NULL, *service = "service"
468 * *:service => *host = NULL, *service = "service"
469 *
470 * in case no : is present in the string, the result depends on
471 * hostserv_prio, as follows:
472 *
473 * when hostserv_prio == BIO_PARSE_PRIO_HOST
474 * host => *host = "host", *service untouched
475 *
476 * when hostserv_prio == BIO_PARSE_PRIO_SERV
477 * service => *host untouched, *service = "service"
478 *
479 */
BIO_parse_hostserv(const char * hostserv,char ** host,char ** service,enum BIO_hostserv_priorities hostserv_prio)480 int BIO_parse_hostserv(const char *hostserv, char **host, char **service,
481 enum BIO_hostserv_priorities hostserv_prio)
482 {
483 const char *h = NULL; size_t hl = 0;
484 const char *p = NULL; size_t pl = 0;
485
486 if (*hostserv == '[') {
487 if ((p = strchr(hostserv, ']')) == NULL)
488 goto spec_err;
489 h = hostserv + 1;
490 hl = p - h;
491 p++;
492 if (*p == '\0')
493 p = NULL;
494 else if (*p != ':')
495 goto spec_err;
496 else {
497 p++;
498 pl = strlen(p);
499 }
500 } else {
501 const char *p2 = strrchr(hostserv, ':');
502 p = strchr(hostserv, ':');
503
504 /*-
505 * Check for more than one colon. There are three possible
506 * interpretations:
507 * 1. IPv6 address with port number, last colon being separator.
508 * 2. IPv6 address only.
509 * 3. IPv6 address only if hostserv_prio == BIO_PARSE_PRIO_HOST,
510 * IPv6 address and port number if hostserv_prio == BIO_PARSE_PRIO_SERV
511 * Because of this ambiguity, we currently choose to make it an
512 * error.
513 */
514 if (p != p2)
515 goto amb_err;
516
517 if (p != NULL) {
518 h = hostserv;
519 hl = p - h;
520 p++;
521 pl = strlen(p);
522 } else if (hostserv_prio == BIO_PARSE_PRIO_HOST) {
523 h = hostserv;
524 hl = strlen(h);
525 } else {
526 p = hostserv;
527 pl = strlen(p);
528 }
529 }
530
531 if (p != NULL && strchr(p, ':'))
532 goto spec_err;
533
534 if (h != NULL && host != NULL) {
535 if (hl == 0
536 || (hl == 1 && h[0] == '*')) {
537 *host = NULL;
538 } else {
539 *host = OPENSSL_strndup(h, hl);
540 if (*host == NULL)
541 goto memerr;
542 }
543 }
544 if (p != NULL && service != NULL) {
545 if (pl == 0
546 || (pl == 1 && p[0] == '*')) {
547 *service = NULL;
548 } else {
549 *service = OPENSSL_strndup(p, pl);
550 if (*service == NULL)
551 goto memerr;
552 }
553 }
554
555 return 1;
556 amb_err:
557 ERR_raise(ERR_LIB_BIO, BIO_R_AMBIGUOUS_HOST_OR_SERVICE);
558 return 0;
559 spec_err:
560 ERR_raise(ERR_LIB_BIO, BIO_R_MALFORMED_HOST_OR_SERVICE);
561 return 0;
562 memerr:
563 ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE);
564 return 0;
565 }
566
567 /* addrinfo_wrap is used to build our own addrinfo "chain".
568 * (it has only one entry, so calling it a chain may be a stretch)
569 * It should ONLY be called when getaddrinfo() and friends
570 * aren't available, OR when dealing with a non IP protocol
571 * family, such as AF_UNIX
572 *
573 * the return value is 1 on success, or 0 on failure, which
574 * only happens if a memory allocation error occurred.
575 */
addrinfo_wrap(int family,int socktype,const void * where,size_t wherelen,unsigned short port,BIO_ADDRINFO ** bai)576 static int addrinfo_wrap(int family, int socktype,
577 const void *where, size_t wherelen,
578 unsigned short port,
579 BIO_ADDRINFO **bai)
580 {
581 if ((*bai = OPENSSL_zalloc(sizeof(**bai))) == NULL) {
582 ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE);
583 return 0;
584 }
585
586 (*bai)->bai_family = family;
587 (*bai)->bai_socktype = socktype;
588 if (socktype == SOCK_STREAM)
589 (*bai)->bai_protocol = IPPROTO_TCP;
590 if (socktype == SOCK_DGRAM)
591 (*bai)->bai_protocol = IPPROTO_UDP;
592 #ifdef AF_UNIX
593 if (family == AF_UNIX)
594 (*bai)->bai_protocol = 0;
595 #endif
596 {
597 /* Magic: We know that BIO_ADDR_sockaddr_noconst is really
598 just an advanced cast of BIO_ADDR* to struct sockaddr *
599 by the power of union, so while it may seem that we're
600 creating a memory leak here, we are not. It will be
601 all right. */
602 BIO_ADDR *addr = BIO_ADDR_new();
603 if (addr != NULL) {
604 BIO_ADDR_rawmake(addr, family, where, wherelen, port);
605 (*bai)->bai_addr = BIO_ADDR_sockaddr_noconst(addr);
606 }
607 }
608 (*bai)->bai_next = NULL;
609 if ((*bai)->bai_addr == NULL) {
610 BIO_ADDRINFO_free(*bai);
611 *bai = NULL;
612 return 0;
613 }
614 return 1;
615 }
616
DEFINE_RUN_ONCE_STATIC(do_bio_lookup_init)617 DEFINE_RUN_ONCE_STATIC(do_bio_lookup_init)
618 {
619 bio_lookup_lock = CRYPTO_THREAD_lock_new();
620 return bio_lookup_lock != NULL;
621 }
622
BIO_lookup(const char * host,const char * service,enum BIO_lookup_type lookup_type,int family,int socktype,BIO_ADDRINFO ** res)623 int BIO_lookup(const char *host, const char *service,
624 enum BIO_lookup_type lookup_type,
625 int family, int socktype, BIO_ADDRINFO **res)
626 {
627 return BIO_lookup_ex(host, service, lookup_type, family, socktype, 0, res);
628 }
629
630 /*-
631 * BIO_lookup_ex - look up the host and service you want to connect to.
632 * @host: the host (or node, in case family == AF_UNIX) you want to connect to.
633 * @service: the service you want to connect to.
634 * @lookup_type: declare intent with the result, client or server.
635 * @family: the address family you want to use. Use AF_UNSPEC for any, or
636 * AF_INET, AF_INET6 or AF_UNIX.
637 * @socktype: The socket type you want to use. Can be SOCK_STREAM, SOCK_DGRAM
638 * or 0 for all.
639 * @protocol: The protocol to use, e.g. IPPROTO_TCP or IPPROTO_UDP or 0 for all.
640 * Note that some platforms may not return IPPROTO_SCTP without
641 * explicitly requesting it (i.e. IPPROTO_SCTP may not be returned
642 * with 0 for the protocol)
643 * @res: Storage place for the resulting list of returned addresses
644 *
645 * This will do a lookup of the host and service that you want to connect to.
646 * It returns a linked list of different addresses you can try to connect to.
647 *
648 * When no longer needed you should call BIO_ADDRINFO_free() to free the result.
649 *
650 * The return value is 1 on success or 0 in case of error.
651 */
BIO_lookup_ex(const char * host,const char * service,int lookup_type,int family,int socktype,int protocol,BIO_ADDRINFO ** res)652 int BIO_lookup_ex(const char *host, const char *service, int lookup_type,
653 int family, int socktype, int protocol, BIO_ADDRINFO **res)
654 {
655 int ret = 0; /* Assume failure */
656
657 switch(family) {
658 case AF_INET:
659 #ifdef AF_INET6
660 case AF_INET6:
661 #endif
662 #ifdef AF_UNIX
663 case AF_UNIX:
664 #endif
665 #ifdef AF_UNSPEC
666 case AF_UNSPEC:
667 #endif
668 break;
669 default:
670 ERR_raise(ERR_LIB_BIO, BIO_R_UNSUPPORTED_PROTOCOL_FAMILY);
671 return 0;
672 }
673
674 #ifdef AF_UNIX
675 if (family == AF_UNIX) {
676 if (addrinfo_wrap(family, socktype, host, strlen(host), 0, res))
677 return 1;
678 else
679 ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE);
680 return 0;
681 }
682 #endif
683
684 if (BIO_sock_init() != 1)
685 return 0;
686
687 if (1) {
688 #ifdef AI_PASSIVE
689 int gai_ret = 0, old_ret = 0;
690 struct addrinfo hints;
691
692 memset(&hints, 0, sizeof(hints));
693
694 hints.ai_family = family;
695 hints.ai_socktype = socktype;
696 hints.ai_protocol = protocol;
697 # ifdef AI_ADDRCONFIG
698 # ifdef AF_UNSPEC
699 if (host != NULL && family == AF_UNSPEC)
700 # endif
701 hints.ai_flags |= AI_ADDRCONFIG;
702 # endif
703
704 if (lookup_type == BIO_LOOKUP_SERVER)
705 hints.ai_flags |= AI_PASSIVE;
706
707 /* Note that |res| SHOULD be a 'struct addrinfo **' thanks to
708 * macro magic in bio_local.h
709 */
710 # if defined(AI_ADDRCONFIG) && defined(AI_NUMERICHOST)
711 retry:
712 # endif
713 switch ((gai_ret = getaddrinfo(host, service, &hints, res))) {
714 # ifdef EAI_SYSTEM
715 case EAI_SYSTEM:
716 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
717 "calling getaddrinfo()");
718 ERR_raise(ERR_LIB_BIO, ERR_R_SYS_LIB);
719 break;
720 # endif
721 # ifdef EAI_MEMORY
722 case EAI_MEMORY:
723 ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE);
724 break;
725 # endif
726 case 0:
727 ret = 1; /* Success */
728 break;
729 default:
730 # if defined(AI_ADDRCONFIG) && defined(AI_NUMERICHOST)
731 if (hints.ai_flags & AI_ADDRCONFIG) {
732 hints.ai_flags &= ~AI_ADDRCONFIG;
733 hints.ai_flags |= AI_NUMERICHOST;
734 old_ret = gai_ret;
735 goto retry;
736 }
737 # endif
738 ERR_raise_data(ERR_LIB_BIO, ERR_R_SYS_LIB,
739 gai_strerror(old_ret ? old_ret : gai_ret));
740 break;
741 }
742 } else {
743 #endif
744 const struct hostent *he;
745 /*
746 * Because struct hostent is defined for 32-bit pointers only with
747 * VMS C, we need to make sure that '&he_fallback_address' and
748 * '&he_fallback_addresses' are 32-bit pointers
749 */
750 #if defined(OPENSSL_SYS_VMS) && defined(__DECC)
751 # pragma pointer_size save
752 # pragma pointer_size 32
753 #endif
754 /* Windows doesn't seem to have in_addr_t */
755 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS)
756 static uint32_t he_fallback_address;
757 static const char *he_fallback_addresses[] =
758 { (char *)&he_fallback_address, NULL };
759 #else
760 static in_addr_t he_fallback_address;
761 static const char *he_fallback_addresses[] =
762 { (char *)&he_fallback_address, NULL };
763 #endif
764 static const struct hostent he_fallback =
765 { NULL, NULL, AF_INET, sizeof(he_fallback_address),
766 (char **)&he_fallback_addresses };
767 #if defined(OPENSSL_SYS_VMS) && defined(__DECC)
768 # pragma pointer_size restore
769 #endif
770
771 struct servent *se;
772 /* Apparently, on WIN64, s_proto and s_port have traded places... */
773 #ifdef _WIN64
774 struct servent se_fallback = { NULL, NULL, NULL, 0 };
775 #else
776 struct servent se_fallback = { NULL, NULL, 0, NULL };
777 #endif
778
779 if (!RUN_ONCE(&bio_lookup_init, do_bio_lookup_init)) {
780 ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE);
781 return 0;
782 }
783
784 if (!CRYPTO_THREAD_write_lock(bio_lookup_lock))
785 return 0;
786
787 he_fallback_address = INADDR_ANY;
788 if (host == NULL) {
789 he = &he_fallback;
790 switch(lookup_type) {
791 case BIO_LOOKUP_CLIENT:
792 he_fallback_address = INADDR_LOOPBACK;
793 break;
794 case BIO_LOOKUP_SERVER:
795 he_fallback_address = INADDR_ANY;
796 break;
797 default:
798 /* We forgot to handle a lookup type! */
799 assert("We forgot to handle a lookup type!" == NULL);
800 ERR_raise(ERR_LIB_BIO, ERR_R_INTERNAL_ERROR);
801 ret = 0;
802 goto err;
803 }
804 } else {
805 he = gethostbyname(host);
806
807 if (he == NULL) {
808 #ifndef OPENSSL_SYS_WINDOWS
809 /*
810 * This might be misleading, because h_errno is used as if
811 * it was errno. To minimize mixup add 1000. Underlying
812 * reason for this is that hstrerror is declared obsolete,
813 * not to mention that a) h_errno is not always guaranteed
814 * to be meaningless; b) hstrerror can reside in yet another
815 * library, linking for sake of hstrerror is an overkill;
816 * c) this path is not executed on contemporary systems
817 * anyway [above getaddrinfo/gai_strerror is]. We just let
818 * system administrator figure this out...
819 */
820 # if defined(OPENSSL_SYS_VXWORKS)
821 /* h_errno doesn't exist on VxWorks */
822 ERR_raise_data(ERR_LIB_SYS, 1000,
823 "calling gethostbyname()");
824 # else
825 ERR_raise_data(ERR_LIB_SYS, 1000 + h_errno,
826 "calling gethostbyname()");
827 # endif
828 #else
829 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
830 "calling gethostbyname()");
831 #endif
832 ret = 0;
833 goto err;
834 }
835 }
836
837 if (service == NULL) {
838 se_fallback.s_port = 0;
839 se_fallback.s_proto = NULL;
840 se = &se_fallback;
841 } else {
842 char *endp = NULL;
843 long portnum = strtol(service, &endp, 10);
844
845 /*
846 * Because struct servent is defined for 32-bit pointers only with
847 * VMS C, we need to make sure that 'proto' is a 32-bit pointer.
848 */
849 #if defined(OPENSSL_SYS_VMS) && defined(__DECC)
850 # pragma pointer_size save
851 # pragma pointer_size 32
852 #endif
853 char *proto = NULL;
854 #if defined(OPENSSL_SYS_VMS) && defined(__DECC)
855 # pragma pointer_size restore
856 #endif
857
858 switch (socktype) {
859 case SOCK_STREAM:
860 proto = "tcp";
861 break;
862 case SOCK_DGRAM:
863 proto = "udp";
864 break;
865 }
866
867 if (endp != service && *endp == '\0'
868 && portnum > 0 && portnum < 65536) {
869 se_fallback.s_port = htons((unsigned short)portnum);
870 se_fallback.s_proto = proto;
871 se = &se_fallback;
872 } else if (endp == service) {
873 se = getservbyname(service, proto);
874
875 if (se == NULL) {
876 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
877 "calling getservbyname()");
878 goto err;
879 }
880 } else {
881 ERR_raise(ERR_LIB_BIO, BIO_R_MALFORMED_HOST_OR_SERVICE);
882 goto err;
883 }
884 }
885
886 *res = NULL;
887
888 {
889 /*
890 * Because hostent::h_addr_list is an array of 32-bit pointers with VMS C,
891 * we must make sure our iterator designates the same element type, hence
892 * the pointer size dance.
893 */
894 #if defined(OPENSSL_SYS_VMS) && defined(__DECC)
895 # pragma pointer_size save
896 # pragma pointer_size 32
897 #endif
898 char **addrlistp;
899 #if defined(OPENSSL_SYS_VMS) && defined(__DECC)
900 # pragma pointer_size restore
901 #endif
902 size_t addresses;
903 BIO_ADDRINFO *tmp_bai = NULL;
904
905 /* The easiest way to create a linked list from an
906 array is to start from the back */
907 for(addrlistp = he->h_addr_list; *addrlistp != NULL;
908 addrlistp++)
909 ;
910
911 for(addresses = addrlistp - he->h_addr_list;
912 addrlistp--, addresses-- > 0; ) {
913 if (!addrinfo_wrap(he->h_addrtype, socktype,
914 *addrlistp, he->h_length,
915 se->s_port, &tmp_bai))
916 goto addrinfo_malloc_err;
917 tmp_bai->bai_next = *res;
918 *res = tmp_bai;
919 continue;
920 addrinfo_malloc_err:
921 BIO_ADDRINFO_free(*res);
922 *res = NULL;
923 ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE);
924 ret = 0;
925 goto err;
926 }
927
928 ret = 1;
929 }
930 err:
931 CRYPTO_THREAD_unlock(bio_lookup_lock);
932 }
933
934 return ret;
935 }
936
937 #endif /* OPENSSL_NO_SOCK */
938