1 /* crypto/bio/b_sock.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59 #include <stdio.h>
60 #include <stdlib.h>
61 #include <errno.h>
62 #define USE_SOCKETS
63 #include "cryptlib.h"
64 #include <openssl/bio.h>
65 #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK)
66 #include <netdb.h>
67 #if defined(NETWARE_CLIB)
68 #include <sys/ioctl.h>
69 NETDB_DEFINE_CONTEXT
70 #endif
71 #endif
72
73 #ifndef OPENSSL_NO_SOCK
74
75 #include <openssl/dso.h>
76
77 #define SOCKET_PROTOCOL IPPROTO_TCP
78
79 #ifdef SO_MAXCONN
80 #define MAX_LISTEN SO_MAXCONN
81 #elif defined(SOMAXCONN)
82 #define MAX_LISTEN SOMAXCONN
83 #else
84 #define MAX_LISTEN 32
85 #endif
86
87 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
88 static int wsa_init_done=0;
89 #endif
90
91 /*
92 * WSAAPI specifier is required to make indirect calls to run-time
93 * linked WinSock 2 functions used in this module, to be specific
94 * [get|free]addrinfo and getnameinfo. This is because WinSock uses
95 * uses non-C calling convention, __stdcall vs. __cdecl, on x86
96 * Windows. On non-WinSock platforms WSAAPI needs to be void.
97 */
98 #ifndef WSAAPI
99 #define WSAAPI
100 #endif
101
102 #if 0
103 static unsigned long BIO_ghbn_hits=0L;
104 static unsigned long BIO_ghbn_miss=0L;
105
106 #define GHBN_NUM 4
107 static struct ghbn_cache_st
108 {
109 char name[129];
110 struct hostent *ent;
111 unsigned long order;
112 } ghbn_cache[GHBN_NUM];
113 #endif
114
115 static int get_ip(const char *str,unsigned char *ip);
116 #if 0
117 static void ghbn_free(struct hostent *a);
118 static struct hostent *ghbn_dup(struct hostent *a);
119 #endif
120 int BIO_get_host_ip(const char *str, unsigned char *ip)
121 {
122 int i;
123 int err = 1;
124 int locked = 0;
125 struct hostent *he;
126
127 i=get_ip(str,ip);
128 if (i < 0)
129 {
130 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS);
131 goto err;
132 }
133
134 /* At this point, we have something that is most probably correct
135 in some way, so let's init the socket. */
136 if (BIO_sock_init() != 1)
137 return 0; /* don't generate another error code here */
138
139 /* If the string actually contained an IP address, we need not do
140 anything more */
141 if (i > 0) return(1);
142
143 /* do a gethostbyname */
144 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
145 locked = 1;
146 he=BIO_gethostbyname(str);
147 if (he == NULL)
148 {
149 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP);
150 goto err;
151 }
152
153 /* cast to short because of win16 winsock definition */
154 if ((short)he->h_addrtype != AF_INET)
155 {
156 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
157 goto err;
158 }
159 for (i=0; i<4; i++)
160 ip[i]=he->h_addr_list[0][i];
161 err = 0;
162
163 err:
164 if (locked)
165 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
166 if (err)
167 {
168 ERR_add_error_data(2,"host=",str);
169 return 0;
170 }
171 else
172 return 1;
173 }
174
175 int BIO_get_port(const char *str, unsigned short *port_ptr)
176 {
177 int i;
178 struct servent *s;
179
180 if (str == NULL)
181 {
182 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED);
183 return(0);
184 }
185 i=atoi(str);
186 if (i != 0)
187 *port_ptr=(unsigned short)i;
188 else
189 {
190 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
191 /* Note: under VMS with SOCKETSHR, it seems like the first
192 * parameter is 'char *', instead of 'const char *'
193 */
194 #ifndef CONST_STRICT
195 s=getservbyname((char *)str,"tcp");
196 #else
197 s=getservbyname(str,"tcp");
198 #endif
199 if(s != NULL)
200 *port_ptr=ntohs((unsigned short)s->s_port);
201 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
202 if(s == NULL)
203 {
204 if (strcmp(str,"http") == 0)
205 *port_ptr=80;
206 else if (strcmp(str,"telnet") == 0)
207 *port_ptr=23;
208 else if (strcmp(str,"socks") == 0)
209 *port_ptr=1080;
210 else if (strcmp(str,"https") == 0)
211 *port_ptr=443;
212 else if (strcmp(str,"ssl") == 0)
213 *port_ptr=443;
214 else if (strcmp(str,"ftp") == 0)
215 *port_ptr=21;
216 else if (strcmp(str,"gopher") == 0)
217 *port_ptr=70;
218 #if 0
219 else if (strcmp(str,"wais") == 0)
220 *port_ptr=21;
221 #endif
222 else
223 {
224 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error());
225 ERR_add_error_data(3,"service='",str,"'");
226 return(0);
227 }
228 }
229 }
230 return(1);
231 }
232
233 int BIO_sock_error(int sock)
234 {
235 int j,i;
236 int size;
237
238 #if defined(OPENSSL_SYS_BEOS_R5)
239 return 0;
240 #endif
241
242 size=sizeof(int);
243 /* Note: under Windows the third parameter is of type (char *)
244 * whereas under other systems it is (void *) if you don't have
245 * a cast it will choke the compiler: if you do have a cast then
246 * you can either go for (char *) or (void *).
247 */
248 i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size);
249 if (i < 0)
250 return(1);
251 else
252 return(j);
253 }
254
255 #if 0
256 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
257 {
258 int i;
259 char **p;
260
261 switch (cmd)
262 {
263 case BIO_GHBN_CTRL_HITS:
264 return(BIO_ghbn_hits);
265 /* break; */
266 case BIO_GHBN_CTRL_MISSES:
267 return(BIO_ghbn_miss);
268 /* break; */
269 case BIO_GHBN_CTRL_CACHE_SIZE:
270 return(GHBN_NUM);
271 /* break; */
272 case BIO_GHBN_CTRL_GET_ENTRY:
273 if ((iarg >= 0) && (iarg <GHBN_NUM) &&
274 (ghbn_cache[iarg].order > 0))
275 {
276 p=(char **)parg;
277 if (p == NULL) return(0);
278 *p=ghbn_cache[iarg].name;
279 ghbn_cache[iarg].name[128]='\0';
280 return(1);
281 }
282 return(0);
283 /* break; */
284 case BIO_GHBN_CTRL_FLUSH:
285 for (i=0; i<GHBN_NUM; i++)
286 ghbn_cache[i].order=0;
287 break;
288 default:
289 return(0);
290 }
291 return(1);
292 }
293 #endif
294
295 #if 0
296 static struct hostent *ghbn_dup(struct hostent *a)
297 {
298 struct hostent *ret;
299 int i,j;
300
301 MemCheck_off();
302 ret=(struct hostent *)OPENSSL_malloc(sizeof(struct hostent));
303 if (ret == NULL) return(NULL);
304 memset(ret,0,sizeof(struct hostent));
305
306 for (i=0; a->h_aliases[i] != NULL; i++)
307 ;
308 i++;
309 ret->h_aliases = (char **)OPENSSL_malloc(i*sizeof(char *));
310 if (ret->h_aliases == NULL)
311 goto err;
312 memset(ret->h_aliases, 0, i*sizeof(char *));
313
314 for (i=0; a->h_addr_list[i] != NULL; i++)
315 ;
316 i++;
317 ret->h_addr_list=(char **)OPENSSL_malloc(i*sizeof(char *));
318 if (ret->h_addr_list == NULL)
319 goto err;
320 memset(ret->h_addr_list, 0, i*sizeof(char *));
321
322 j=strlen(a->h_name)+1;
323 if ((ret->h_name=OPENSSL_malloc(j)) == NULL) goto err;
324 memcpy((char *)ret->h_name,a->h_name,j);
325 for (i=0; a->h_aliases[i] != NULL; i++)
326 {
327 j=strlen(a->h_aliases[i])+1;
328 if ((ret->h_aliases[i]=OPENSSL_malloc(j)) == NULL) goto err;
329 memcpy(ret->h_aliases[i],a->h_aliases[i],j);
330 }
331 ret->h_length=a->h_length;
332 ret->h_addrtype=a->h_addrtype;
333 for (i=0; a->h_addr_list[i] != NULL; i++)
334 {
335 if ((ret->h_addr_list[i]=OPENSSL_malloc(a->h_length)) == NULL)
336 goto err;
337 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);
338 }
339 if (0)
340 {
341 err:
342 if (ret != NULL)
343 ghbn_free(ret);
344 ret=NULL;
345 }
346 MemCheck_on();
347 return(ret);
348 }
349
350 static void ghbn_free(struct hostent *a)
351 {
352 int i;
353
354 if(a == NULL)
355 return;
356
357 if (a->h_aliases != NULL)
358 {
359 for (i=0; a->h_aliases[i] != NULL; i++)
360 OPENSSL_free(a->h_aliases[i]);
361 OPENSSL_free(a->h_aliases);
362 }
363 if (a->h_addr_list != NULL)
364 {
365 for (i=0; a->h_addr_list[i] != NULL; i++)
366 OPENSSL_free(a->h_addr_list[i]);
367 OPENSSL_free(a->h_addr_list);
368 }
369 if (a->h_name != NULL) OPENSSL_free(a->h_name);
370 OPENSSL_free(a);
371 }
372
373 #endif
374
375 struct hostent *BIO_gethostbyname(const char *name)
376 {
377 #if 1
378 /* Caching gethostbyname() results forever is wrong,
379 * so we have to let the true gethostbyname() worry about this */
380 #if (defined(NETWARE_BSDSOCK) && !defined(__NOVELL_LIBC__))
381 return gethostbyname((char*)name);
382 #else
383 return gethostbyname(name);
384 #endif
385 #else
386 struct hostent *ret;
387 int i,lowi=0,j;
388 unsigned long low= (unsigned long)-1;
389
390
391 # if 0
392 /* It doesn't make sense to use locking here: The function interface
393 * is not thread-safe, because threads can never be sure when
394 * some other thread destroys the data they were given a pointer to.
395 */
396 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
397 # endif
398 j=strlen(name);
399 if (j < 128)
400 {
401 for (i=0; i<GHBN_NUM; i++)
402 {
403 if (low > ghbn_cache[i].order)
404 {
405 low=ghbn_cache[i].order;
406 lowi=i;
407 }
408 if (ghbn_cache[i].order > 0)
409 {
410 if (strncmp(name,ghbn_cache[i].name,128) == 0)
411 break;
412 }
413 }
414 }
415 else
416 i=GHBN_NUM;
417
418 if (i == GHBN_NUM) /* no hit*/
419 {
420 BIO_ghbn_miss++;
421 /* Note: under VMS with SOCKETSHR, it seems like the first
422 * parameter is 'char *', instead of 'const char *'
423 */
424 # ifndef CONST_STRICT
425 ret=gethostbyname((char *)name);
426 # else
427 ret=gethostbyname(name);
428 # endif
429
430 if (ret == NULL)
431 goto end;
432 if (j > 128) /* too big to cache */
433 {
434 # if 0
435 /* If we were trying to make this function thread-safe (which
436 * is bound to fail), we'd have to give up in this case
437 * (or allocate more memory). */
438 ret = NULL;
439 # endif
440 goto end;
441 }
442
443 /* else add to cache */
444 if (ghbn_cache[lowi].ent != NULL)
445 ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */
446 ghbn_cache[lowi].name[0] = '\0';
447
448 if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL)
449 {
450 BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE);
451 goto end;
452 }
453 strncpy(ghbn_cache[lowi].name,name,128);
454 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;
455 }
456 else
457 {
458 BIO_ghbn_hits++;
459 ret= ghbn_cache[i].ent;
460 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
461 }
462 end:
463 # if 0
464 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
465 # endif
466 return(ret);
467 #endif
468 }
469
470
471 int BIO_sock_init(void)
472 {
473 #ifdef OPENSSL_SYS_WINDOWS
474 static struct WSAData wsa_state;
475
476 if (!wsa_init_done)
477 {
478 int err;
479
480 wsa_init_done=1;
481 memset(&wsa_state,0,sizeof(wsa_state));
482 /* Not making wsa_state available to the rest of the
483 * code is formally wrong. But the structures we use
484 * are [beleived to be] invariable among Winsock DLLs,
485 * while API availability is [expected to be] probed
486 * at run-time with DSO_global_lookup. */
487 if (WSAStartup(0x0202,&wsa_state)!=0)
488 {
489 err=WSAGetLastError();
490 SYSerr(SYS_F_WSASTARTUP,err);
491 BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
492 return(-1);
493 }
494 }
495 #endif /* OPENSSL_SYS_WINDOWS */
496 #ifdef WATT32
497 extern int _watt_do_exit;
498 _watt_do_exit = 0; /* don't make sock_init() call exit() */
499 if (sock_init())
500 return (-1);
501 #endif
502
503 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
504 WORD wVerReq;
505 WSADATA wsaData;
506 int err;
507
508 if (!wsa_init_done)
509 {
510 wsa_init_done=1;
511 wVerReq = MAKEWORD( 2, 0 );
512 err = WSAStartup(wVerReq,&wsaData);
513 if (err != 0)
514 {
515 SYSerr(SYS_F_WSASTARTUP,err);
516 BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
517 return(-1);
518 }
519 }
520 #endif
521
522 return(1);
523 }
524
525 void BIO_sock_cleanup(void)
526 {
527 #ifdef OPENSSL_SYS_WINDOWS
528 if (wsa_init_done)
529 {
530 wsa_init_done=0;
531 #if 0 /* this call is claimed to be non-present in Winsock2 */
532 WSACancelBlockingCall();
533 #endif
534 WSACleanup();
535 }
536 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
537 if (wsa_init_done)
538 {
539 wsa_init_done=0;
540 WSACleanup();
541 }
542 #endif
543 }
544
545 #if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
546
547 int BIO_socket_ioctl(int fd, long type, void *arg)
548 {
549 int i;
550
551 #ifdef __DJGPP__
552 i=ioctlsocket(fd,type,(char *)arg);
553 #else
554 # if defined(OPENSSL_SYS_VMS)
555 /* 2011-02-18 SMS.
556 * VMS ioctl() can't tolerate a 64-bit "void *arg", but we
557 * observe that all the consumers pass in an "unsigned long *",
558 * so we arrange a local copy with a short pointer, and use
559 * that, instead.
560 */
561 # if __INITIAL_POINTER_SIZE == 64
562 # define ARG arg_32p
563 # pragma pointer_size save
564 # pragma pointer_size 32
565 unsigned long arg_32;
566 unsigned long *arg_32p;
567 # pragma pointer_size restore
568 arg_32p = &arg_32;
569 arg_32 = *((unsigned long *) arg);
570 # else /* __INITIAL_POINTER_SIZE == 64 */
571 # define ARG arg
572 # endif /* __INITIAL_POINTER_SIZE == 64 [else] */
573 # else /* defined(OPENSSL_SYS_VMS) */
574 # define ARG arg
575 # endif /* defined(OPENSSL_SYS_VMS) [else] */
576
577 i=ioctlsocket(fd,type,ARG);
578 #endif /* __DJGPP__ */
579 if (i < 0)
580 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());
581 return(i);
582 }
583 #endif /* __VMS_VER */
584
585 /* The reason I have implemented this instead of using sscanf is because
586 * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
587 static int get_ip(const char *str, unsigned char ip[4])
588 {
589 unsigned int tmp[4];
590 int num=0,c,ok=0;
591
592 tmp[0]=tmp[1]=tmp[2]=tmp[3]=0;
593
594 for (;;)
595 {
596 c= *(str++);
597 if ((c >= '0') && (c <= '9'))
598 {
599 ok=1;
600 tmp[num]=tmp[num]*10+c-'0';
601 if (tmp[num] > 255) return(0);
602 }
603 else if (c == '.')
604 {
605 if (!ok) return(-1);
606 if (num == 3) return(0);
607 num++;
608 ok=0;
609 }
610 else if (c == '\0' && (num == 3) && ok)
611 break;
612 else
613 return(0);
614 }
615 ip[0]=tmp[0];
616 ip[1]=tmp[1];
617 ip[2]=tmp[2];
618 ip[3]=tmp[3];
619 return(1);
620 }
621
622 int BIO_get_accept_socket(char *host, int bind_mode)
623 {
624 int ret=0;
625 union {
626 struct sockaddr sa;
627 struct sockaddr_in sa_in;
628 #if OPENSSL_USE_IPV6
629 struct sockaddr_in6 sa_in6;
630 #endif
631 } server,client;
632 int s=INVALID_SOCKET,cs,addrlen;
633 unsigned char ip[4];
634 unsigned short port;
635 char *str=NULL,*e;
636 char *h,*p;
637 unsigned long l;
638 int err_num;
639
640 if (BIO_sock_init() != 1) return(INVALID_SOCKET);
641
642 if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET);
643
644 h=p=NULL;
645 h=str;
646 for (e=str; *e; e++)
647 {
648 if (*e == ':')
649 {
650 p=e;
651 }
652 else if (*e == '/')
653 {
654 *e='\0';
655 break;
656 }
657 }
658 if (p) *p++='\0'; /* points at last ':', '::port' is special [see below] */
659 else p=h,h=NULL;
660
661 #ifdef EAI_FAMILY
662 do {
663 static union { void *p;
664 int (WSAAPI *f)(const char *,const char *,
665 const struct addrinfo *,
666 struct addrinfo **);
667 } p_getaddrinfo = {NULL};
668 static union { void *p;
669 void (WSAAPI *f)(struct addrinfo *);
670 } p_freeaddrinfo = {NULL};
671 struct addrinfo *res,hint;
672
673 if (p_getaddrinfo.p==NULL)
674 {
675 if ((p_getaddrinfo.p=DSO_global_lookup("getaddrinfo"))==NULL ||
676 (p_freeaddrinfo.p=DSO_global_lookup("freeaddrinfo"))==NULL)
677 p_getaddrinfo.p=(void*)-1;
678 }
679 if (p_getaddrinfo.p==(void *)-1) break;
680
681 /* '::port' enforces IPv6 wildcard listener. Some OSes,
682 * e.g. Solaris, default to IPv6 without any hint. Also
683 * note that commonly IPv6 wildchard socket can service
684 * IPv4 connections just as well... */
685 memset(&hint,0,sizeof(hint));
686 hint.ai_flags = AI_PASSIVE;
687 if (h)
688 {
689 if (strchr(h,':'))
690 {
691 if (h[1]=='\0') h=NULL;
692 #if OPENSSL_USE_IPV6
693 hint.ai_family = AF_INET6;
694 #else
695 h=NULL;
696 #endif
697 }
698 else if (h[0]=='*' && h[1]=='\0')
699 {
700 hint.ai_family = AF_INET;
701 h=NULL;
702 }
703 }
704
705 if ((*p_getaddrinfo.f)(h,p,&hint,&res)) break;
706
707 addrlen = res->ai_addrlen<=sizeof(server) ?
708 res->ai_addrlen :
709 sizeof(server);
710 memcpy(&server, res->ai_addr, addrlen);
711
712 (*p_freeaddrinfo.f)(res);
713 goto again;
714 } while (0);
715 #endif
716
717 if (!BIO_get_port(p,&port)) goto err;
718
719 memset((char *)&server,0,sizeof(server));
720 server.sa_in.sin_family=AF_INET;
721 server.sa_in.sin_port=htons(port);
722 addrlen = sizeof(server.sa_in);
723
724 if (h == NULL || strcmp(h,"*") == 0)
725 server.sa_in.sin_addr.s_addr=INADDR_ANY;
726 else
727 {
728 if (!BIO_get_host_ip(h,&(ip[0]))) goto err;
729 l=(unsigned long)
730 ((unsigned long)ip[0]<<24L)|
731 ((unsigned long)ip[1]<<16L)|
732 ((unsigned long)ip[2]<< 8L)|
733 ((unsigned long)ip[3]);
734 server.sa_in.sin_addr.s_addr=htonl(l);
735 }
736
737 again:
738 s=socket(server.sa.sa_family,SOCK_STREAM,SOCKET_PROTOCOL);
739 if (s == INVALID_SOCKET)
740 {
741 SYSerr(SYS_F_SOCKET,get_last_socket_error());
742 ERR_add_error_data(3,"port='",host,"'");
743 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);
744 goto err;
745 }
746
747 #ifdef SO_REUSEADDR
748 if (bind_mode == BIO_BIND_REUSEADDR)
749 {
750 int i=1;
751
752 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));
753 bind_mode=BIO_BIND_NORMAL;
754 }
755 #endif
756 if (bind(s,&server.sa,addrlen) == -1)
757 {
758 #ifdef SO_REUSEADDR
759 err_num=get_last_socket_error();
760 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
761 #ifdef OPENSSL_SYS_WINDOWS
762 /* Some versions of Windows define EADDRINUSE to
763 * a dummy value.
764 */
765 (err_num == WSAEADDRINUSE))
766 #else
767 (err_num == EADDRINUSE))
768 #endif
769 {
770 client = server;
771 if (h == NULL || strcmp(h,"*") == 0)
772 {
773 #if OPENSSL_USE_IPV6
774 if (client.sa.sa_family == AF_INET6)
775 {
776 memset(&client.sa_in6.sin6_addr,0,sizeof(client.sa_in6.sin6_addr));
777 client.sa_in6.sin6_addr.s6_addr[15]=1;
778 }
779 else
780 #endif
781 if (client.sa.sa_family == AF_INET)
782 {
783 client.sa_in.sin_addr.s_addr=htonl(0x7F000001);
784 }
785 else goto err;
786 }
787 cs=socket(client.sa.sa_family,SOCK_STREAM,SOCKET_PROTOCOL);
788 if (cs != INVALID_SOCKET)
789 {
790 int ii;
791 ii=connect(cs,&client.sa,addrlen);
792 closesocket(cs);
793 if (ii == INVALID_SOCKET)
794 {
795 bind_mode=BIO_BIND_REUSEADDR;
796 closesocket(s);
797 goto again;
798 }
799 /* else error */
800 }
801 /* else error */
802 }
803 #endif
804 SYSerr(SYS_F_BIND,err_num);
805 ERR_add_error_data(3,"port='",host,"'");
806 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);
807 goto err;
808 }
809 if (listen(s,MAX_LISTEN) == -1)
810 {
811 SYSerr(SYS_F_BIND,get_last_socket_error());
812 ERR_add_error_data(3,"port='",host,"'");
813 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);
814 goto err;
815 }
816 ret=1;
817 err:
818 if (str != NULL) OPENSSL_free(str);
819 if ((ret == 0) && (s != INVALID_SOCKET))
820 {
821 closesocket(s);
822 s= INVALID_SOCKET;
823 }
824 return(s);
825 }
826
827 int BIO_accept(int sock, char **addr)
828 {
829 int ret=INVALID_SOCKET;
830 unsigned long l;
831 unsigned short port;
832 char *p;
833
834 struct {
835 /*
836 * As for following union. Trouble is that there are platforms
837 * that have socklen_t and there are platforms that don't, on
838 * some platforms socklen_t is int and on some size_t. So what
839 * one can do? One can cook #ifdef spaghetti, which is nothing
840 * but masochistic. Or one can do union between int and size_t.
841 * One naturally does it primarily for 64-bit platforms where
842 * sizeof(int) != sizeof(size_t). But would it work? Note that
843 * if size_t member is initialized to 0, then later int member
844 * assignment naturally does the job on little-endian platforms
845 * regardless accept's expectations! What about big-endians?
846 * If accept expects int*, then it works, and if size_t*, then
847 * length value would appear as unreasonably large. But this
848 * won't prevent it from filling in the address structure. The
849 * trouble of course would be if accept returns more data than
850 * actual buffer can accomodate and overwrite stack... That's
851 * where early OPENSSL_assert comes into picture. Besides, the
852 * only 64-bit big-endian platform found so far that expects
853 * size_t* is HP-UX, where stack grows towards higher address.
854 * <appro>
855 */
856 union { size_t s; int i; } len;
857 union {
858 struct sockaddr sa;
859 struct sockaddr_in sa_in;
860 #if OPENSSL_USE_IPV6
861 struct sockaddr_in6 sa_in6;
862 #endif
863 } from;
864 } sa;
865
866 sa.len.s=0;
867 sa.len.i=sizeof(sa.from);
868 memset(&sa.from,0,sizeof(sa.from));
869 ret=accept(sock,&sa.from.sa,(void *)&sa.len);
870 if (sizeof(sa.len.i)!=sizeof(sa.len.s) && sa.len.i==0)
871 {
872 OPENSSL_assert(sa.len.s<=sizeof(sa.from));
873 sa.len.i = (int)sa.len.s;
874 /* use sa.len.i from this point */
875 }
876 if (ret == INVALID_SOCKET)
877 {
878 if(BIO_sock_should_retry(ret)) return -2;
879 SYSerr(SYS_F_ACCEPT,get_last_socket_error());
880 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);
881 goto end;
882 }
883
884 if (addr == NULL) goto end;
885
886 #ifdef EAI_FAMILY
887 do {
888 char h[NI_MAXHOST],s[NI_MAXSERV];
889 size_t nl;
890 static union { void *p;
891 int (WSAAPI *f)(const struct sockaddr *,size_t/*socklen_t*/,
892 char *,size_t,char *,size_t,int);
893 } p_getnameinfo = {NULL};
894 /* 2nd argument to getnameinfo is specified to
895 * be socklen_t. Unfortunately there is a number
896 * of environments where socklen_t is not defined.
897 * As it's passed by value, it's safe to pass it
898 * as size_t... <appro> */
899
900 if (p_getnameinfo.p==NULL)
901 {
902 if ((p_getnameinfo.p=DSO_global_lookup("getnameinfo"))==NULL)
903 p_getnameinfo.p=(void*)-1;
904 }
905 if (p_getnameinfo.p==(void *)-1) break;
906
907 if ((*p_getnameinfo.f)(&sa.from.sa,sa.len.i,h,sizeof(h),s,sizeof(s),
908 NI_NUMERICHOST|NI_NUMERICSERV)) break;
909 nl = strlen(h)+strlen(s)+2;
910 p = *addr;
911 if (p) { *p = '\0'; p = OPENSSL_realloc(p,nl); }
912 else { p = OPENSSL_malloc(nl); }
913 if (p==NULL)
914 {
915 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
916 goto end;
917 }
918 *addr = p;
919 BIO_snprintf(*addr,nl,"%s:%s",h,s);
920 goto end;
921 } while(0);
922 #endif
923 if (sa.from.sa.sa_family != AF_INET) goto end;
924 l=ntohl(sa.from.sa_in.sin_addr.s_addr);
925 port=ntohs(sa.from.sa_in.sin_port);
926 if (*addr == NULL)
927 {
928 if ((p=OPENSSL_malloc(24)) == NULL)
929 {
930 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
931 goto end;
932 }
933 *addr=p;
934 }
935 BIO_snprintf(*addr,24,"%d.%d.%d.%d:%d",
936 (unsigned char)(l>>24L)&0xff,
937 (unsigned char)(l>>16L)&0xff,
938 (unsigned char)(l>> 8L)&0xff,
939 (unsigned char)(l )&0xff,
940 port);
941 end:
942 return(ret);
943 }
944
945 int BIO_set_tcp_ndelay(int s, int on)
946 {
947 int ret=0;
948 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
949 int opt;
950
951 #ifdef SOL_TCP
952 opt=SOL_TCP;
953 #else
954 #ifdef IPPROTO_TCP
955 opt=IPPROTO_TCP;
956 #endif
957 #endif
958
959 ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));
960 #endif
961 return(ret == 0);
962 }
963
964 int BIO_socket_nbio(int s, int mode)
965 {
966 int ret= -1;
967 int l;
968
969 l=mode;
970 #ifdef FIONBIO
971 ret=BIO_socket_ioctl(s,FIONBIO,&l);
972 #endif
973 return(ret == 0);
974 }
975 #endif