b_sock.c revision 3d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30d
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> 69NETDB_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)) 88static 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 103static unsigned long BIO_ghbn_hits=0L; 104static unsigned long BIO_ghbn_miss=0L; 105 106#define GHBN_NUM 4 107static 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 115static int get_ip(const char *str,unsigned char *ip); 116#if 0 117static void ghbn_free(struct hostent *a); 118static struct hostent *ghbn_dup(struct hostent *a); 119#endif 120int 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 175int 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 233int 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 256long 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 296static 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 { 341err: 342 if (ret != NULL) 343 ghbn_free(ret); 344 ret=NULL; 345 } 346 MemCheck_on(); 347 return(ret); 348 } 349 350static 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 375struct 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 } 462end: 463# if 0 464 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME); 465# endif 466 return(ret); 467#endif 468 } 469 470 471int 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 525void 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 547int 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 i=ioctlsocket(fd,type,arg); 555#endif /* __DJGPP__ */ 556 if (i < 0) 557 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error()); 558 return(i); 559 } 560#endif /* __VMS_VER */ 561 562/* The reason I have implemented this instead of using sscanf is because 563 * Visual C 1.52c gives an unresolved external when linking a DLL :-( */ 564static int get_ip(const char *str, unsigned char ip[4]) 565 { 566 unsigned int tmp[4]; 567 int num=0,c,ok=0; 568 569 tmp[0]=tmp[1]=tmp[2]=tmp[3]=0; 570 571 for (;;) 572 { 573 c= *(str++); 574 if ((c >= '0') && (c <= '9')) 575 { 576 ok=1; 577 tmp[num]=tmp[num]*10+c-'0'; 578 if (tmp[num] > 255) return(0); 579 } 580 else if (c == '.') 581 { 582 if (!ok) return(-1); 583 if (num == 3) return(0); 584 num++; 585 ok=0; 586 } 587 else if (c == '\0' && (num == 3) && ok) 588 break; 589 else 590 return(0); 591 } 592 ip[0]=tmp[0]; 593 ip[1]=tmp[1]; 594 ip[2]=tmp[2]; 595 ip[3]=tmp[3]; 596 return(1); 597 } 598 599int BIO_get_accept_socket(char *host, int bind_mode) 600 { 601 int ret=0; 602 union { 603 struct sockaddr sa; 604 struct sockaddr_in sa_in; 605#if OPENSSL_USE_IPV6 606 struct sockaddr_in6 sa_in6; 607#endif 608 } server,client; 609 int s=INVALID_SOCKET,cs,addrlen; 610 unsigned char ip[4]; 611 unsigned short port; 612 char *str=NULL,*e; 613 char *h,*p; 614 unsigned long l; 615 int err_num; 616 617 if (BIO_sock_init() != 1) return(INVALID_SOCKET); 618 619 if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET); 620 621 h=p=NULL; 622 h=str; 623 for (e=str; *e; e++) 624 { 625 if (*e == ':') 626 { 627 p=e; 628 } 629 else if (*e == '/') 630 { 631 *e='\0'; 632 break; 633 } 634 } 635 if (p) *p++='\0'; /* points at last ':', '::port' is special [see below] */ 636 else p=h,h=NULL; 637 638#ifdef EAI_FAMILY 639 do { 640 static union { void *p; 641 int (WSAAPI *f)(const char *,const char *, 642 const struct addrinfo *, 643 struct addrinfo **); 644 } p_getaddrinfo = {NULL}; 645 static union { void *p; 646 void (WSAAPI *f)(struct addrinfo *); 647 } p_freeaddrinfo = {NULL}; 648 struct addrinfo *res,hint; 649 650 if (p_getaddrinfo.p==NULL) 651 { 652 if ((p_getaddrinfo.p=DSO_global_lookup("getaddrinfo"))==NULL || 653 (p_freeaddrinfo.p=DSO_global_lookup("freeaddrinfo"))==NULL) 654 p_getaddrinfo.p=(void*)-1; 655 } 656 if (p_getaddrinfo.p==(void *)-1) break; 657 658 /* '::port' enforces IPv6 wildcard listener. Some OSes, 659 * e.g. Solaris, default to IPv6 without any hint. Also 660 * note that commonly IPv6 wildchard socket can service 661 * IPv4 connections just as well... */ 662 memset(&hint,0,sizeof(hint)); 663 if (h) 664 { 665 if (strchr(h,':')) 666 { 667 if (h[1]=='\0') h=NULL; 668#if OPENSSL_USE_IPV6 669 hint.ai_family = AF_INET6; 670#else 671 h=NULL; 672#endif 673 } 674 else if (h[0]=='*' && h[1]=='\0') 675 h=NULL; 676 } 677 678 if ((*p_getaddrinfo.f)(h,p,&hint,&res)) break; 679 680 addrlen = res->ai_addrlen<=sizeof(server) ? 681 res->ai_addrlen : 682 sizeof(server); 683 memcpy(&server, res->ai_addr, addrlen); 684 685 (*p_freeaddrinfo.f)(res); 686 goto again; 687 } while (0); 688#endif 689 690 if (!BIO_get_port(p,&port)) goto err; 691 692 memset((char *)&server,0,sizeof(server)); 693 server.sa_in.sin_family=AF_INET; 694 server.sa_in.sin_port=htons(port); 695 addrlen = sizeof(server.sa_in); 696 697 if (h == NULL || strcmp(h,"*") == 0) 698 server.sa_in.sin_addr.s_addr=INADDR_ANY; 699 else 700 { 701 if (!BIO_get_host_ip(h,&(ip[0]))) goto err; 702 l=(unsigned long) 703 ((unsigned long)ip[0]<<24L)| 704 ((unsigned long)ip[1]<<16L)| 705 ((unsigned long)ip[2]<< 8L)| 706 ((unsigned long)ip[3]); 707 server.sa_in.sin_addr.s_addr=htonl(l); 708 } 709 710again: 711 s=socket(server.sa.sa_family,SOCK_STREAM,SOCKET_PROTOCOL); 712 if (s == INVALID_SOCKET) 713 { 714 SYSerr(SYS_F_SOCKET,get_last_socket_error()); 715 ERR_add_error_data(3,"port='",host,"'"); 716 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET); 717 goto err; 718 } 719 720#ifdef SO_REUSEADDR 721 if (bind_mode == BIO_BIND_REUSEADDR) 722 { 723 int i=1; 724 725 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i)); 726 bind_mode=BIO_BIND_NORMAL; 727 } 728#endif 729 if (bind(s,&server.sa,addrlen) == -1) 730 { 731#ifdef SO_REUSEADDR 732 err_num=get_last_socket_error(); 733 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) && 734#ifdef OPENSSL_SYS_WINDOWS 735 /* Some versions of Windows define EADDRINUSE to 736 * a dummy value. 737 */ 738 (err_num == WSAEADDRINUSE)) 739#else 740 (err_num == EADDRINUSE)) 741#endif 742 { 743 client = server; 744 if (h == NULL || strcmp(h,"*") == 0) 745 { 746#if OPENSSL_USE_IPV6 747 if (client.sa.sa_family == AF_INET6) 748 { 749 memset(&client.sa_in6.sin6_addr,0,sizeof(client.sa_in6.sin6_addr)); 750 client.sa_in6.sin6_addr.s6_addr[15]=1; 751 } 752 else 753#endif 754 if (client.sa.sa_family == AF_INET) 755 { 756 client.sa_in.sin_addr.s_addr=htonl(0x7F000001); 757 } 758 else goto err; 759 } 760 cs=socket(client.sa.sa_family,SOCK_STREAM,SOCKET_PROTOCOL); 761 if (cs != INVALID_SOCKET) 762 { 763 int ii; 764 ii=connect(cs,&client.sa,addrlen); 765 closesocket(cs); 766 if (ii == INVALID_SOCKET) 767 { 768 bind_mode=BIO_BIND_REUSEADDR; 769 closesocket(s); 770 goto again; 771 } 772 /* else error */ 773 } 774 /* else error */ 775 } 776#endif 777 SYSerr(SYS_F_BIND,err_num); 778 ERR_add_error_data(3,"port='",host,"'"); 779 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET); 780 goto err; 781 } 782 if (listen(s,MAX_LISTEN) == -1) 783 { 784 SYSerr(SYS_F_BIND,get_last_socket_error()); 785 ERR_add_error_data(3,"port='",host,"'"); 786 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET); 787 goto err; 788 } 789 ret=1; 790err: 791 if (str != NULL) OPENSSL_free(str); 792 if ((ret == 0) && (s != INVALID_SOCKET)) 793 { 794 closesocket(s); 795 s= INVALID_SOCKET; 796 } 797 return(s); 798 } 799 800int BIO_accept(int sock, char **addr) 801 { 802 int ret=INVALID_SOCKET; 803 unsigned long l; 804 unsigned short port; 805 char *p; 806 807 struct { 808 /* 809 * As for following union. Trouble is that there are platforms 810 * that have socklen_t and there are platforms that don't, on 811 * some platforms socklen_t is int and on some size_t. So what 812 * one can do? One can cook #ifdef spaghetti, which is nothing 813 * but masochistic. Or one can do union between int and size_t. 814 * One naturally does it primarily for 64-bit platforms where 815 * sizeof(int) != sizeof(size_t). But would it work? Note that 816 * if size_t member is initialized to 0, then later int member 817 * assignment naturally does the job on little-endian platforms 818 * regardless accept's expectations! What about big-endians? 819 * If accept expects int*, then it works, and if size_t*, then 820 * length value would appear as unreasonably large. But this 821 * won't prevent it from filling in the address structure. The 822 * trouble of course would be if accept returns more data than 823 * actual buffer can accomodate and overwrite stack... That's 824 * where early OPENSSL_assert comes into picture. Besides, the 825 * only 64-bit big-endian platform found so far that expects 826 * size_t* is HP-UX, where stack grows towards higher address. 827 * <appro> 828 */ 829 union { size_t s; int i; } len; 830 union { 831 struct sockaddr sa; 832 struct sockaddr_in sa_in; 833#if OPENSSL_USE_IPV6 834 struct sockaddr_in6 sa_in6; 835#endif 836 } from; 837 } sa; 838 839 sa.len.s=0; 840 sa.len.i=sizeof(sa.from); 841 memset(&sa.from,0,sizeof(sa.from)); 842 ret=accept(sock,&sa.from.sa,(void *)&sa.len); 843 if (sizeof(sa.len.i)!=sizeof(sa.len.s) && sa.len.i==0) 844 { 845 OPENSSL_assert(sa.len.s<=sizeof(sa.from)); 846 sa.len.i = (int)sa.len.s; 847 /* use sa.len.i from this point */ 848 } 849 if (ret == INVALID_SOCKET) 850 { 851 if(BIO_sock_should_retry(ret)) return -2; 852 SYSerr(SYS_F_ACCEPT,get_last_socket_error()); 853 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR); 854 goto end; 855 } 856 857 if (addr == NULL) goto end; 858 859#ifdef EAI_FAMILY 860 do { 861 char h[NI_MAXHOST],s[NI_MAXSERV]; 862 size_t nl; 863 static union { void *p; 864 int (WSAAPI *f)(const struct sockaddr *,size_t/*socklen_t*/, 865 char *,size_t,char *,size_t,int); 866 } p_getnameinfo = {NULL}; 867 /* 2nd argument to getnameinfo is specified to 868 * be socklen_t. Unfortunately there is a number 869 * of environments where socklen_t is not defined. 870 * As it's passed by value, it's safe to pass it 871 * as size_t... <appro> */ 872 873 if (p_getnameinfo.p==NULL) 874 { 875 if ((p_getnameinfo.p=DSO_global_lookup("getnameinfo"))==NULL) 876 p_getnameinfo.p=(void*)-1; 877 } 878 if (p_getnameinfo.p==(void *)-1) break; 879 880 if ((*p_getnameinfo.f)(&sa.from.sa,sa.len.i,h,sizeof(h),s,sizeof(s), 881 NI_NUMERICHOST|NI_NUMERICSERV)) break; 882 nl = strlen(h)+strlen(s)+2; 883 p = *addr; 884 if (p) { *p = '\0'; p = OPENSSL_realloc(p,nl); } 885 else { p = OPENSSL_malloc(nl); } 886 if (p==NULL) 887 { 888 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE); 889 goto end; 890 } 891 *addr = p; 892 BIO_snprintf(*addr,nl,"%s:%s",h,s); 893 goto end; 894 } while(0); 895#endif 896 if (sa.from.sa.sa_family != AF_INET) goto end; 897 l=ntohl(sa.from.sa_in.sin_addr.s_addr); 898 port=ntohs(sa.from.sa_in.sin_port); 899 if (*addr == NULL) 900 { 901 if ((p=OPENSSL_malloc(24)) == NULL) 902 { 903 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE); 904 goto end; 905 } 906 *addr=p; 907 } 908 BIO_snprintf(*addr,24,"%d.%d.%d.%d:%d", 909 (unsigned char)(l>>24L)&0xff, 910 (unsigned char)(l>>16L)&0xff, 911 (unsigned char)(l>> 8L)&0xff, 912 (unsigned char)(l )&0xff, 913 port); 914end: 915 return(ret); 916 } 917 918int BIO_set_tcp_ndelay(int s, int on) 919 { 920 int ret=0; 921#if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP)) 922 int opt; 923 924#ifdef SOL_TCP 925 opt=SOL_TCP; 926#else 927#ifdef IPPROTO_TCP 928 opt=IPPROTO_TCP; 929#endif 930#endif 931 932 ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on)); 933#endif 934 return(ret == 0); 935 } 936#endif 937 938int BIO_socket_nbio(int s, int mode) 939 { 940 int ret= -1; 941 int l; 942 943 l=mode; 944#ifdef FIONBIO 945 ret=BIO_socket_ioctl(s,FIONBIO,&l); 946#endif 947 return(ret == 0); 948 } 949