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