source: EcnlProtoTool/trunk/openssl-1.1.0e/crypto/bio/b_addr.c@ 331

Last change on this file since 331 was 331, checked in by coas-nagasima, 6 years ago

prototoolに関連するプロジェクトをnewlibからmuslを使うよう変更・更新
ntshellをnewlibの下位の実装から、muslのsyscallの実装に変更・更新
以下のOSSをアップデート
・mruby-1.3.0
・musl-1.1.18
・onigmo-6.1.3
・tcc-0.9.27
以下のOSSを追加
・openssl-1.1.0e
・curl-7.57.0
・zlib-1.2.11
以下のmrbgemsを追加
・iij/mruby-digest
・iij/mruby-env
・iij/mruby-errno
・iij/mruby-iijson
・iij/mruby-ipaddr
・iij/mruby-mock
・iij/mruby-require
・iij/mruby-tls-openssl
  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/x-csrc
File size: 24.1 KB
Line 
1/*
2 * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (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#include <string.h>
11
12#include "bio_lcl.h"
13#include <openssl/crypto.h>
14
15#ifndef OPENSSL_NO_SOCK
16#include <openssl/err.h>
17#include <openssl/buffer.h>
18#include <internal/thread_once.h>
19#include <ctype.h>
20
21#ifdef _HPUX_SOURCE
22static const char *ossl_hstrerror(int herr)
23{
24 switch (herr) {
25 case -1:
26 return strerror(errno);
27 case 0:
28 return "No error";
29 case HOST_NOT_FOUND:
30 return "Host not found";
31 case NO_DATA: /* NO_ADDRESS is a synonym */
32 return "No data";
33 case NO_RECOVERY:
34 return "Non recoverable error";
35 case TRY_AGAIN:
36 return "Try again";
37 default:
38 break;
39 }
40 return "unknown error";
41}
42# define hstrerror(e) ossl_hstrerror(e)
43#endif
44
45CRYPTO_RWLOCK *bio_lookup_lock;
46static CRYPTO_ONCE bio_lookup_init = CRYPTO_ONCE_STATIC_INIT;
47
48/*
49 * Throughout this file and bio_lcl.h, the existence of the macro
50 * AI_PASSIVE is used to detect the availability of struct addrinfo,
51 * getnameinfo() and getaddrinfo(). If that macro doesn't exist,
52 * we use our own implementation instead, using gethostbyname,
53 * getservbyname and a few other.
54 */
55
56/**********************************************************************
57 *
58 * Address structure
59 *
60 */
61
62BIO_ADDR *BIO_ADDR_new(void)
63{
64 BIO_ADDR *ret = OPENSSL_zalloc(sizeof(*ret));
65
66 if (ret == NULL) {
67 BIOerr(BIO_F_BIO_ADDR_NEW, ERR_R_MALLOC_FAILURE);
68 return NULL;
69 }
70
71 ret->sa.sa_family = AF_UNSPEC;
72 return ret;
73}
74
75void BIO_ADDR_free(BIO_ADDR *ap)
76{
77 OPENSSL_free(ap);
78}
79
80void BIO_ADDR_clear(BIO_ADDR *ap)
81{
82 memset(ap, 0, sizeof(*ap));
83 ap->sa.sa_family = AF_UNSPEC;
84}
85
86/*
87 * BIO_ADDR_make - non-public routine to fill a BIO_ADDR with the contents
88 * of a struct sockaddr.
89 */
90int BIO_ADDR_make(BIO_ADDR *ap, const struct sockaddr *sa)
91{
92 if (sa->sa_family == AF_INET) {
93 ap->s_in = *(const struct sockaddr_in *)sa;
94 return 1;
95 }
96#ifdef AF_INET6
97 if (sa->sa_family == AF_INET6) {
98 ap->s_in6 = *(const struct sockaddr_in6 *)sa;
99 return 1;
100 }
101#endif
102#ifdef AF_UNIX
103 if (ap->sa.sa_family == AF_UNIX) {
104 ap->s_un = *(const struct sockaddr_un *)sa;
105 return 1;
106 }
107#endif
108
109 return 0;
110}
111
112int BIO_ADDR_rawmake(BIO_ADDR *ap, int family,
113 const void *where, size_t wherelen,
114 unsigned short port)
115{
116#ifdef AF_UNIX
117 if (family == AF_UNIX) {
118 if (wherelen + 1 > sizeof(ap->s_un.sun_path))
119 return 0;
120 memset(&ap->s_un, 0, sizeof(ap->s_un));
121 ap->s_un.sun_family = family;
122 strncpy(ap->s_un.sun_path, where, sizeof(ap->s_un.sun_path) - 1);
123 return 1;
124 }
125#endif
126 if (family == AF_INET) {
127 if (wherelen != sizeof(struct in_addr))
128 return 0;
129 memset(&ap->s_in, 0, sizeof(ap->s_in));
130 ap->s_in.sin_family = family;
131 ap->s_in.sin_port = port;
132 ap->s_in.sin_addr = *(struct in_addr *)where;
133 return 1;
134 }
135#ifdef AF_INET6
136 if (family == AF_INET6) {
137 if (wherelen != sizeof(struct in6_addr))
138 return 0;
139 memset(&ap->s_in6, 0, sizeof(ap->s_in6));
140 ap->s_in6.sin6_family = family;
141 ap->s_in6.sin6_port = port;
142 ap->s_in6.sin6_addr = *(struct in6_addr *)where;
143 return 1;
144 }
145#endif
146
147 return 0;
148}
149
150int BIO_ADDR_family(const BIO_ADDR *ap)
151{
152 return ap->sa.sa_family;
153}
154
155int BIO_ADDR_rawaddress(const BIO_ADDR *ap, void *p, size_t *l)
156{
157 size_t len = 0;
158 const void *addrptr = NULL;
159
160 if (ap->sa.sa_family == AF_INET) {
161 len = sizeof(ap->s_in.sin_addr);
162 addrptr = &ap->s_in.sin_addr;
163 }
164#ifdef AF_INET6
165 else if (ap->sa.sa_family == AF_INET6) {
166 len = sizeof(ap->s_in6.sin6_addr);
167 addrptr = &ap->s_in6.sin6_addr;
168 }
169#endif
170#ifdef AF_UNIX
171 else if (ap->sa.sa_family == AF_UNIX) {
172 len = strlen(ap->s_un.sun_path);
173 addrptr = &ap->s_un.sun_path;
174 }
175#endif
176
177 if (addrptr == NULL)
178 return 0;
179
180 if (p != NULL) {
181 memcpy(p, addrptr, len);
182 }
183 if (l != NULL)
184 *l = len;
185
186 return 1;
187}
188
189unsigned short BIO_ADDR_rawport(const BIO_ADDR *ap)
190{
191 if (ap->sa.sa_family == AF_INET)
192 return ap->s_in.sin_port;
193#ifdef AF_INET6
194 if (ap->sa.sa_family == AF_INET6)
195 return ap->s_in6.sin6_port;
196#endif
197 return 0;
198}
199
200/*-
201 * addr_strings - helper function to get host and service names
202 * @ap: the BIO_ADDR that has the input info
203 * @numeric: 0 if actual names should be returned, 1 if the numeric
204 * representation should be returned.
205 * @hostname: a pointer to a pointer to a memory area to store the
206 * host name or numeric representation. Unused if NULL.
207 * @service: a pointer to a pointer to a memory area to store the
208 * service name or numeric representation. Unused if NULL.
209 *
210 * The return value is 0 on failure, with the error code in the error
211 * stack, and 1 on success.
212 */
213static int addr_strings(const BIO_ADDR *ap, int numeric,
214 char **hostname, char **service)
215{
216 if (BIO_sock_init() != 1)
217 return 0;
218
219 if (1) {
220#ifdef AI_PASSIVE
221 int ret = 0;
222 char host[NI_MAXHOST] = "", serv[NI_MAXSERV] = "";
223 int flags = 0;
224
225 if (numeric)
226 flags |= NI_NUMERICHOST | NI_NUMERICSERV;
227
228 if ((ret = getnameinfo(BIO_ADDR_sockaddr(ap),
229 BIO_ADDR_sockaddr_size(ap),
230 host, sizeof(host), serv, sizeof(serv),
231 flags)) != 0) {
232# ifdef EAI_SYSTEM
233 if (ret == EAI_SYSTEM) {
234 SYSerr(SYS_F_GETNAMEINFO, get_last_socket_error());
235 BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB);
236 } else
237# endif
238 {
239 BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB);
240 ERR_add_error_data(1, gai_strerror(ret));
241 }
242 return 0;
243 }
244
245 /* VMS getnameinfo() has a bug, it doesn't fill in serv, which
246 * leaves it with whatever garbage that happens to be there.
247 * However, we initialise serv with the empty string (serv[0]
248 * is therefore NUL), so it gets real easy to detect when things
249 * didn't go the way one might expect.
250 */
251 if (serv[0] == '\0') {
252 BIO_snprintf(serv, sizeof(serv), "%d",
253 ntohs(BIO_ADDR_rawport(ap)));
254 }
255
256 if (hostname != NULL)
257 *hostname = OPENSSL_strdup(host);
258 if (service != NULL)
259 *service = OPENSSL_strdup(serv);
260 } else {
261#endif
262 if (hostname != NULL)
263 *hostname = OPENSSL_strdup(inet_ntoa(ap->s_in.sin_addr));
264 if (service != NULL) {
265 char serv[6]; /* port is 16 bits => max 5 decimal digits */
266 BIO_snprintf(serv, sizeof(serv), "%d", ntohs(ap->s_in.sin_port));
267 *service = OPENSSL_strdup(serv);
268 }
269 }
270
271 if ((hostname != NULL && *hostname == NULL)
272 || (service != NULL && *service == NULL)) {
273 if (hostname != NULL) {
274 OPENSSL_free(*hostname);
275 *hostname = NULL;
276 }
277 if (service != NULL) {
278 OPENSSL_free(*service);
279 *service = NULL;
280 }
281 BIOerr(BIO_F_ADDR_STRINGS, ERR_R_MALLOC_FAILURE);
282 return 0;
283 }
284
285 return 1;
286}
287
288char *BIO_ADDR_hostname_string(const BIO_ADDR *ap, int numeric)
289{
290 char *hostname = NULL;
291
292 if (addr_strings(ap, numeric, &hostname, NULL))
293 return hostname;
294
295 return NULL;
296}
297
298char *BIO_ADDR_service_string(const BIO_ADDR *ap, int numeric)
299{
300 char *service = NULL;
301
302 if (addr_strings(ap, numeric, NULL, &service))
303 return service;
304
305 return NULL;
306}
307
308char *BIO_ADDR_path_string(const BIO_ADDR *ap)
309{
310#ifdef AF_UNIX
311 if (ap->sa.sa_family == AF_UNIX)
312 return OPENSSL_strdup(ap->s_un.sun_path);
313#endif
314 return NULL;
315}
316
317/*
318 * BIO_ADDR_sockaddr - non-public routine to return the struct sockaddr
319 * for a given BIO_ADDR. In reality, this is simply a type safe cast.
320 * The returned struct sockaddr is const, so it can't be tampered with.
321 */
322const struct sockaddr *BIO_ADDR_sockaddr(const BIO_ADDR *ap)
323{
324 return &(ap->sa);
325}
326
327/*
328 * BIO_ADDR_sockaddr_noconst - non-public function that does the same
329 * as BIO_ADDR_sockaddr, but returns a non-const. USE WITH CARE, as
330 * it allows you to tamper with the data (and thereby the contents
331 * of the input BIO_ADDR).
332 */
333struct sockaddr *BIO_ADDR_sockaddr_noconst(BIO_ADDR *ap)
334{
335 return &(ap->sa);
336}
337
338/*
339 * BIO_ADDR_sockaddr_size - non-public function that returns the size
340 * of the struct sockaddr the BIO_ADDR is using. If the protocol family
341 * isn't set or is something other than AF_INET, AF_INET6 or AF_UNIX,
342 * the size of the BIO_ADDR type is returned.
343 */
344socklen_t BIO_ADDR_sockaddr_size(const BIO_ADDR *ap)
345{
346 if (ap->sa.sa_family == AF_INET)
347 return sizeof(ap->s_in);
348#ifdef AF_INET6
349 if (ap->sa.sa_family == AF_INET6)
350 return sizeof(ap->s_in6);
351#endif
352#ifdef AF_UNIX
353 if (ap->sa.sa_family == AF_UNIX)
354 return sizeof(ap->s_un);
355#endif
356 return sizeof(*ap);
357}
358
359/**********************************************************************
360 *
361 * Address info database
362 *
363 */
364
365const BIO_ADDRINFO *BIO_ADDRINFO_next(const BIO_ADDRINFO *bai)
366{
367 if (bai != NULL)
368 return bai->bai_next;
369 return NULL;
370}
371
372int BIO_ADDRINFO_family(const BIO_ADDRINFO *bai)
373{
374 if (bai != NULL)
375 return bai->bai_family;
376 return 0;
377}
378
379int BIO_ADDRINFO_socktype(const BIO_ADDRINFO *bai)
380{
381 if (bai != NULL)
382 return bai->bai_socktype;
383 return 0;
384}
385
386int BIO_ADDRINFO_protocol(const BIO_ADDRINFO *bai)
387{
388 if (bai != NULL) {
389 if (bai->bai_protocol != 0)
390 return bai->bai_protocol;
391
392#ifdef AF_UNIX
393 if (bai->bai_family == AF_UNIX)
394 return 0;
395#endif
396
397 switch (bai->bai_socktype) {
398 case SOCK_STREAM:
399 return IPPROTO_TCP;
400 case SOCK_DGRAM:
401 return IPPROTO_UDP;
402 default:
403 break;
404 }
405 }
406 return 0;
407}
408
409/*
410 * BIO_ADDRINFO_sockaddr_size - non-public function that returns the size
411 * of the struct sockaddr inside the BIO_ADDRINFO.
412 */
413socklen_t BIO_ADDRINFO_sockaddr_size(const BIO_ADDRINFO *bai)
414{
415 if (bai != NULL)
416 return bai->bai_addrlen;
417 return 0;
418}
419
420/*
421 * BIO_ADDRINFO_sockaddr - non-public function that returns bai_addr
422 * as the struct sockaddr it is.
423 */
424const struct sockaddr *BIO_ADDRINFO_sockaddr(const BIO_ADDRINFO *bai)
425{
426 if (bai != NULL)
427 return bai->bai_addr;
428 return NULL;
429}
430
431const BIO_ADDR *BIO_ADDRINFO_address(const BIO_ADDRINFO *bai)
432{
433 if (bai != NULL)
434 return (BIO_ADDR *)bai->bai_addr;
435 return NULL;
436}
437
438void BIO_ADDRINFO_free(BIO_ADDRINFO *bai)
439{
440 if (bai == NULL)
441 return;
442
443#ifdef AI_PASSIVE
444# ifdef AF_UNIX
445# define _cond bai->bai_family != AF_UNIX
446# else
447# define _cond 1
448# endif
449 if (_cond) {
450 freeaddrinfo(bai);
451 return;
452 }
453#endif
454
455 /* Free manually when we know that addrinfo_wrap() was used.
456 * See further comment above addrinfo_wrap()
457 */
458 while (bai != NULL) {
459 BIO_ADDRINFO *next = bai->bai_next;
460 OPENSSL_free(bai->bai_addr);
461 OPENSSL_free(bai);
462 bai = next;
463 }
464}
465
466/**********************************************************************
467 *
468 * Service functions
469 *
470 */
471
472/*-
473 * The specs in hostserv can take these forms:
474 *
475 * host:service => *host = "host", *service = "service"
476 * host:* => *host = "host", *service = NULL
477 * host: => *host = "host", *service = NULL
478 * :service => *host = NULL, *service = "service"
479 * *:service => *host = NULL, *service = "service"
480 *
481 * in case no : is present in the string, the result depends on
482 * hostserv_prio, as follows:
483 *
484 * when hostserv_prio == BIO_PARSE_PRIO_HOST
485 * host => *host = "host", *service untouched
486 *
487 * when hostserv_prio == BIO_PARSE_PRIO_SERV
488 * service => *host untouched, *service = "service"
489 *
490 */
491int BIO_parse_hostserv(const char *hostserv, char **host, char **service,
492 enum BIO_hostserv_priorities hostserv_prio)
493{
494 const char *h = NULL; size_t hl = 0;
495 const char *p = NULL; size_t pl = 0;
496
497 if (*hostserv == '[') {
498 if ((p = strchr(hostserv, ']')) == NULL)
499 goto spec_err;
500 h = hostserv + 1;
501 hl = p - h;
502 p++;
503 if (*p == '\0')
504 p = NULL;
505 else if (*p != ':')
506 goto spec_err;
507 else {
508 p++;
509 pl = strlen(p);
510 }
511 } else {
512 const char *p2 = strrchr(hostserv, ':');
513 p = strchr(hostserv, ':');
514
515 /*-
516 * Check for more than one colon. There are three possible
517 * interpretations:
518 * 1. IPv6 address with port number, last colon being separator.
519 * 2. IPv6 address only.
520 * 3. IPv6 address only if hostserv_prio == BIO_PARSE_PRIO_HOST,
521 * IPv6 address and port number if hostserv_prio == BIO_PARSE_PRIO_SERV
522 * Because of this ambiguity, we currently choose to make it an
523 * error.
524 */
525 if (p != p2)
526 goto amb_err;
527
528 if (p != NULL) {
529 h = hostserv;
530 hl = p - h;
531 p++;
532 pl = strlen(p);
533 } else if (hostserv_prio == BIO_PARSE_PRIO_HOST) {
534 h = hostserv;
535 hl = strlen(h);
536 } else {
537 p = hostserv;
538 pl = strlen(p);
539 }
540 }
541
542 if (p != NULL && strchr(p, ':'))
543 goto spec_err;
544
545 if (h != NULL && host != NULL) {
546 if (hl == 0
547 || (hl == 1 && h[0] == '*')) {
548 *host = NULL;
549 } else {
550 *host = OPENSSL_strndup(h, hl);
551 if (*host == NULL)
552 goto memerr;
553 }
554 }
555 if (p != NULL && service != NULL) {
556 if (pl == 0
557 || (pl == 1 && p[0] == '*')) {
558 *service = NULL;
559 } else {
560 *service = OPENSSL_strndup(p, pl);
561 if (*service == NULL)
562 goto memerr;
563 }
564 }
565
566 return 1;
567 amb_err:
568 BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_AMBIGUOUS_HOST_OR_SERVICE);
569 return 0;
570 spec_err:
571 BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_MALFORMED_HOST_OR_SERVICE);
572 return 0;
573 memerr:
574 BIOerr(BIO_F_BIO_PARSE_HOSTSERV, ERR_R_MALLOC_FAILURE);
575 return 0;
576}
577
578/* addrinfo_wrap is used to build our own addrinfo "chain".
579 * (it has only one entry, so calling it a chain may be a stretch)
580 * It should ONLY be called when getaddrinfo() and friends
581 * aren't available, OR when dealing with a non IP protocol
582 * family, such as AF_UNIX
583 *
584 * the return value is 1 on success, or 0 on failure, which
585 * only happens if a memory allocation error occurred.
586 */
587static int addrinfo_wrap(int family, int socktype,
588 const void *where, size_t wherelen,
589 unsigned short port,
590 BIO_ADDRINFO **bai)
591{
592 OPENSSL_assert(bai != NULL);
593
594 *bai = OPENSSL_zalloc(sizeof(**bai));
595 if (*bai == NULL)
596 return 0;
597
598 (*bai)->bai_family = family;
599 (*bai)->bai_socktype = socktype;
600 if (socktype == SOCK_STREAM)
601 (*bai)->bai_protocol = IPPROTO_TCP;
602 if (socktype == SOCK_DGRAM)
603 (*bai)->bai_protocol = IPPROTO_UDP;
604#ifdef AF_UNIX
605 if (family == AF_UNIX)
606 (*bai)->bai_protocol = 0;
607#endif
608 {
609 /* Magic: We know that BIO_ADDR_sockaddr_noconst is really
610 just an advanced cast of BIO_ADDR* to struct sockaddr *
611 by the power of union, so while it may seem that we're
612 creating a memory leak here, we are not. It will be
613 all right. */
614 BIO_ADDR *addr = BIO_ADDR_new();
615 if (addr != NULL) {
616 BIO_ADDR_rawmake(addr, family, where, wherelen, port);
617 (*bai)->bai_addr = BIO_ADDR_sockaddr_noconst(addr);
618 }
619 }
620 (*bai)->bai_next = NULL;
621 if ((*bai)->bai_addr == NULL) {
622 BIO_ADDRINFO_free(*bai);
623 *bai = NULL;
624 return 0;
625 }
626 return 1;
627}
628
629DEFINE_RUN_ONCE_STATIC(do_bio_lookup_init)
630{
631 OPENSSL_init_crypto(0, NULL);
632 bio_lookup_lock = CRYPTO_THREAD_lock_new();
633 return bio_lookup_lock != NULL;
634}
635
636/*-
637 * BIO_lookup - look up the node and service you want to connect to.
638 * @node: the node you want to connect to.
639 * @service: the service you want to connect to.
640 * @lookup_type: declare intent with the result, client or server.
641 * @family: the address family you want to use. Use AF_UNSPEC for any, or
642 * AF_INET, AF_INET6 or AF_UNIX.
643 * @socktype: The socket type you want to use. Can be SOCK_STREAM, SOCK_DGRAM
644 * or 0 for all.
645 * @res: Storage place for the resulting list of returned addresses
646 *
647 * This will do a lookup of the node and service that you want to connect to.
648 * It returns a linked list of different addresses you can try to connect to.
649 *
650 * When no longer needed you should call BIO_ADDRINFO_free() to free the result.
651 *
652 * The return value is 1 on success or 0 in case of error.
653 */
654int BIO_lookup(const char *host, const char *service,
655 enum BIO_lookup_type lookup_type,
656 int family, int socktype, BIO_ADDRINFO **res)
657{
658 int ret = 0; /* Assume failure */
659
660 switch(family) {
661 case AF_INET:
662#ifdef AF_INET6
663 case AF_INET6:
664#endif
665#ifdef AF_UNIX
666 case AF_UNIX:
667#endif
668#ifdef AF_UNSPEC
669 case AF_UNSPEC:
670#endif
671 break;
672 default:
673 BIOerr(BIO_F_BIO_LOOKUP, BIO_R_UNSUPPORTED_PROTOCOL_FAMILY);
674 return 0;
675 }
676
677#ifdef AF_UNIX
678 if (family == AF_UNIX) {
679 if (addrinfo_wrap(family, socktype, host, strlen(host), 0, res))
680 return 1;
681 else
682 BIOerr(BIO_F_BIO_LOOKUP, ERR_R_MALLOC_FAILURE);
683 return 0;
684 }
685#endif
686
687 if (BIO_sock_init() != 1)
688 return 0;
689
690 if (1) {
691 int gai_ret = 0;
692#ifdef AI_PASSIVE
693 struct addrinfo hints;
694 memset(&hints, 0, sizeof hints);
695
696 hints.ai_family = family;
697 hints.ai_socktype = socktype;
698
699 if (lookup_type == BIO_LOOKUP_SERVER)
700 hints.ai_flags |= AI_PASSIVE;
701
702 /* Note that |res| SHOULD be a 'struct addrinfo **' thanks to
703 * macro magic in bio_lcl.h
704 */
705 switch ((gai_ret = getaddrinfo(host, service, &hints, res))) {
706# ifdef EAI_SYSTEM
707 case EAI_SYSTEM:
708 SYSerr(SYS_F_GETADDRINFO, get_last_socket_error());
709 BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB);
710 break;
711# endif
712 case 0:
713 ret = 1; /* Success */
714 break;
715 default:
716 BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB);
717 ERR_add_error_data(1, gai_strerror(gai_ret));
718 break;
719 }
720 } else {
721#endif
722 const struct hostent *he;
723/*
724 * Because struct hostent is defined for 32-bit pointers only with
725 * VMS C, we need to make sure that '&he_fallback_address' and
726 * '&he_fallback_addresses' are 32-bit pointers
727 */
728#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
729# pragma pointer_size save
730# pragma pointer_size 32
731#endif
732 /* Windows doesn't seem to have in_addr_t */
733#ifdef OPENSSL_SYS_WINDOWS
734 static uint32_t he_fallback_address;
735 static const char *he_fallback_addresses[] =
736 { (char *)&he_fallback_address, NULL };
737#else
738 static in_addr_t he_fallback_address;
739 static const char *he_fallback_addresses[] =
740 { (char *)&he_fallback_address, NULL };
741#endif
742 static const struct hostent he_fallback =
743 { NULL, NULL, AF_INET, sizeof(he_fallback_address),
744 (char **)&he_fallback_addresses };
745#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
746# pragma pointer_size restore
747#endif
748
749 struct servent *se;
750 /* Apparently, on WIN64, s_proto and s_port have traded places... */
751#ifdef _WIN64
752 struct servent se_fallback = { NULL, NULL, NULL, 0 };
753#else
754 struct servent se_fallback = { NULL, NULL, 0, NULL };
755#endif
756
757 if (!RUN_ONCE(&bio_lookup_init, do_bio_lookup_init)) {
758 BIOerr(BIO_F_BIO_LOOKUP, ERR_R_MALLOC_FAILURE);
759 ret = 0;
760 goto err;
761 }
762
763 CRYPTO_THREAD_write_lock(bio_lookup_lock);
764 he_fallback_address = INADDR_ANY;
765 if (host == NULL) {
766 he = &he_fallback;
767 switch(lookup_type) {
768 case BIO_LOOKUP_CLIENT:
769 he_fallback_address = INADDR_LOOPBACK;
770 break;
771 case BIO_LOOKUP_SERVER:
772 he_fallback_address = INADDR_ANY;
773 break;
774 default:
775 OPENSSL_assert(("We forgot to handle a lookup type!" == 0));
776 break;
777 }
778 } else {
779 he = gethostbyname(host);
780
781 if (he == NULL) {
782#ifndef OPENSSL_SYS_WINDOWS
783 BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB);
784 ERR_add_error_data(1, hstrerror(h_errno));
785#else
786 SYSerr(SYS_F_GETHOSTBYNAME, WSAGetLastError());
787#endif
788 ret = 0;
789 goto err;
790 }
791 }
792
793 if (service == NULL) {
794 se_fallback.s_port = 0;
795 se_fallback.s_proto = NULL;
796 se = &se_fallback;
797 } else {
798 char *endp = NULL;
799 long portnum = strtol(service, &endp, 10);
800
801/*
802 * Because struct servent is defined for 32-bit pointers only with
803 * VMS C, we need to make sure that 'proto' is a 32-bit pointer.
804 */
805#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
806# pragma pointer_size save
807# pragma pointer_size 32
808#endif
809 char *proto = NULL;
810#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
811# pragma pointer_size restore
812#endif
813
814 switch (socktype) {
815 case SOCK_STREAM:
816 proto = "tcp";
817 break;
818 case SOCK_DGRAM:
819 proto = "udp";
820 break;
821 }
822
823 if (endp != service && *endp == '\0'
824 && portnum > 0 && portnum < 65536) {
825 se_fallback.s_port = htons(portnum);
826 se_fallback.s_proto = proto;
827 se = &se_fallback;
828 } else if (endp == service) {
829 se = getservbyname(service, proto);
830
831 if (se == NULL) {
832#ifndef OPENSSL_SYS_WINDOWS
833 BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB);
834 ERR_add_error_data(1, hstrerror(h_errno));
835#else
836 SYSerr(SYS_F_GETSERVBYNAME, WSAGetLastError());
837#endif
838 goto err;
839 }
840 } else {
841 BIOerr(BIO_F_BIO_LOOKUP, BIO_R_MALFORMED_HOST_OR_SERVICE);
842 goto err;
843 }
844 }
845
846 *res = NULL;
847
848 {
849/*
850 * Because hostent::h_addr_list is an array of 32-bit pointers with VMS C,
851 * we must make sure our iterator designates the same element type, hence
852 * the pointer size dance.
853 */
854#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
855# pragma pointer_size save
856# pragma pointer_size 32
857#endif
858 char **addrlistp;
859#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
860# pragma pointer_size restore
861#endif
862 size_t addresses;
863 BIO_ADDRINFO *tmp_bai = NULL;
864
865 /* The easiest way to create a linked list from an
866 array is to start from the back */
867 for(addrlistp = he->h_addr_list; *addrlistp != NULL;
868 addrlistp++)
869 ;
870
871 for(addresses = addrlistp - he->h_addr_list;
872 addrlistp--, addresses-- > 0; ) {
873 if (!addrinfo_wrap(he->h_addrtype, socktype,
874 *addrlistp, he->h_length,
875 se->s_port, &tmp_bai))
876 goto addrinfo_malloc_err;
877 tmp_bai->bai_next = *res;
878 *res = tmp_bai;
879 continue;
880 addrinfo_malloc_err:
881 BIO_ADDRINFO_free(*res);
882 *res = NULL;
883 BIOerr(BIO_F_BIO_LOOKUP, ERR_R_MALLOC_FAILURE);
884 ret = 0;
885 goto err;
886 }
887
888 ret = 1;
889 }
890 err:
891 CRYPTO_THREAD_unlock(bio_lookup_lock);
892 }
893
894 return ret;
895}
896
897#endif /* OPENSSL_NO_SOCK */
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