1 /* crypto/bio/b_sock.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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; 633 socklen_t addrlen; 634 unsigned char ip[4]; 635 unsigned short port; 636 char *str=NULL,*e; 637 char *h,*p; 638 unsigned long l; 639 int err_num; 640 641 if (BIO_sock_init() != 1) return(INVALID_SOCKET); 642 643 if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET); 644 645 h=p=NULL; 646 h=str; 647 for (e=str; *e; e++) 648 { 649 if (*e == ':') 650 { 651 p=e; 652 } 653 else if (*e == '/') 654 { 655 *e='\0'; 656 break; 657 } 658 } 659 if (p) *p++='\0'; /* points at last ':', '::port' is special [see below] */ 660 else p=h,h=NULL; 661 662 #ifdef EAI_FAMILY 663 do { 664 static union { void *p; 665 int (WSAAPI *f)(const char *,const char *, 666 const struct addrinfo *, 667 struct addrinfo **); 668 } p_getaddrinfo = {NULL}; 669 static union { void *p; 670 void (WSAAPI *f)(struct addrinfo *); 671 } p_freeaddrinfo = {NULL}; 672 struct addrinfo *res,hint; 673 674 if (p_getaddrinfo.p==NULL) 675 { 676 if ((p_getaddrinfo.p=DSO_global_lookup("getaddrinfo"))==NULL || 677 (p_freeaddrinfo.p=DSO_global_lookup("freeaddrinfo"))==NULL) 678 p_getaddrinfo.p=(void*)-1; 679 } 680 if (p_getaddrinfo.p==(void *)-1) break; 681 682 /* '::port' enforces IPv6 wildcard listener. Some OSes, 683 * e.g. Solaris, default to IPv6 without any hint. Also 684 * note that commonly IPv6 wildchard socket can service 685 * IPv4 connections just as well... */ 686 memset(&hint,0,sizeof(hint)); 687 hint.ai_flags = AI_PASSIVE; 688 if (h) 689 { 690 if (strchr(h,':')) 691 { 692 if (h[1]=='\0') h=NULL; 693 #if OPENSSL_USE_IPV6 694 hint.ai_family = AF_INET6; 695 #else 696 h=NULL; 697 #endif 698 } 699 else if (h[0]=='*' && h[1]=='\0') 700 { 701 hint.ai_family = AF_INET; 702 h=NULL; 703 } 704 } 705 706 if ((*p_getaddrinfo.f)(h,p,&hint,&res)) break; 707 708 addrlen = res->ai_addrlen <= (socklen_t)sizeof(server) ? 709 res->ai_addrlen : 710 (socklen_t)sizeof(server); 711 memcpy(&server, res->ai_addr, (size_t)addrlen); 712 713 (*p_freeaddrinfo.f)(res); 714 goto again; 715 } while (0); 716 #endif 717 718 if (!BIO_get_port(p,&port)) goto err; 719 720 memset((char *)&server,0,sizeof(server)); 721 server.sa_in.sin_family=AF_INET; 722 server.sa_in.sin_port=htons(port); 723 addrlen = (socklen_t)sizeof(server.sa_in); 724 725 if (h == NULL || strcmp(h,"*") == 0) 726 server.sa_in.sin_addr.s_addr=INADDR_ANY; 727 else 728 { 729 if (!BIO_get_host_ip(h,&(ip[0]))) goto err; 730 l=(unsigned long) 731 ((unsigned long)ip[0]<<24L)| 732 ((unsigned long)ip[1]<<16L)| 733 ((unsigned long)ip[2]<< 8L)| 734 ((unsigned long)ip[3]); 735 server.sa_in.sin_addr.s_addr=htonl(l); 736 } 737 738 again: 739 s=socket(server.sa.sa_family,SOCK_STREAM,SOCKET_PROTOCOL); 740 if (s == INVALID_SOCKET) 741 { 742 SYSerr(SYS_F_SOCKET,get_last_socket_error()); 743 ERR_add_error_data(3,"port='",host,"'"); 744 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET); 745 goto err; 746 } 747 748 #ifdef SO_REUSEADDR 749 if (bind_mode == BIO_BIND_REUSEADDR) 750 { 751 int i=1; 752 753 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i)); 754 bind_mode=BIO_BIND_NORMAL; 755 } 756 #endif 757 if (bind(s,&server.sa,addrlen) == -1) 758 { 759 #ifdef SO_REUSEADDR 760 err_num=get_last_socket_error(); 761 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) && 762 #ifdef OPENSSL_SYS_WINDOWS 763 /* Some versions of Windows define EADDRINUSE to 764 * a dummy value. 765 */ 766 (err_num == WSAEADDRINUSE)) 767 #else 768 (err_num == EADDRINUSE)) 769 #endif 770 { 771 client = server; 772 if (h == NULL || strcmp(h,"*") == 0) 773 { 774 #if OPENSSL_USE_IPV6 775 if (client.sa.sa_family == AF_INET6) 776 { 777 memset(&client.sa_in6.sin6_addr,0,sizeof(client.sa_in6.sin6_addr)); 778 client.sa_in6.sin6_addr.s6_addr[15]=1; 779 } 780 else 781 #endif 782 if (client.sa.sa_family == AF_INET) 783 { 784 client.sa_in.sin_addr.s_addr=htonl(0x7F000001); 785 } 786 else goto err; 787 } 788 cs=socket(client.sa.sa_family,SOCK_STREAM,SOCKET_PROTOCOL); 789 if (cs != INVALID_SOCKET) 790 { 791 int ii; 792 ii=connect(cs,&client.sa,addrlen); 793 closesocket(cs); 794 if (ii == INVALID_SOCKET) 795 { 796 bind_mode=BIO_BIND_REUSEADDR; 797 closesocket(s); 798 goto again; 799 } 800 /* else error */ 801 } 802 /* else error */ 803 } 804 #endif 805 SYSerr(SYS_F_BIND,err_num); 806 ERR_add_error_data(3,"port='",host,"'"); 807 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET); 808 goto err; 809 } 810 if (listen(s,MAX_LISTEN) == -1) 811 { 812 SYSerr(SYS_F_BIND,get_last_socket_error()); 813 ERR_add_error_data(3,"port='",host,"'"); 814 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET); 815 goto err; 816 } 817 ret=1; 818 err: 819 if (str != NULL) OPENSSL_free(str); 820 if ((ret == 0) && (s != INVALID_SOCKET)) 821 { 822 closesocket(s); 823 s= INVALID_SOCKET; 824 } 825 return(s); 826 } 827 828 int BIO_accept(int sock, char **addr) 829 { 830 int ret=INVALID_SOCKET; 831 unsigned long l; 832 unsigned short port; 833 char *p; 834 835 struct { 836 /* 837 * As for following union. Trouble is that there are platforms 838 * that have socklen_t and there are platforms that don't, on 839 * some platforms socklen_t is int and on some size_t. So what 840 * one can do? One can cook #ifdef spaghetti, which is nothing 841 * but masochistic. Or one can do union between int and size_t. 842 * One naturally does it primarily for 64-bit platforms where 843 * sizeof(int) != sizeof(size_t). But would it work? Note that 844 * if size_t member is initialized to 0, then later int member 845 * assignment naturally does the job on little-endian platforms 846 * regardless accept's expectations! What about big-endians? 847 * If accept expects int*, then it works, and if size_t*, then 848 * length value would appear as unreasonably large. But this 849 * won't prevent it from filling in the address structure. The 850 * trouble of course would be if accept returns more data than 851 * actual buffer can accomodate and overwrite stack... That's 852 * where early OPENSSL_assert comes into picture. Besides, the 853 * only 64-bit big-endian platform found so far that expects 854 * size_t* is HP-UX, where stack grows towards higher address. 855 * <appro> 856 */ 857 union { size_t s; int i; } len; 858 union { 859 struct sockaddr sa; 860 struct sockaddr_in sa_in; 861 #if OPENSSL_USE_IPV6 862 struct sockaddr_in6 sa_in6; 863 #endif 864 } from; 865 } sa; 866 867 sa.len.s=0; 868 sa.len.i=sizeof(sa.from); 869 memset(&sa.from,0,sizeof(sa.from)); 870 ret=accept(sock,&sa.from.sa,(void *)&sa.len); 871 if (sizeof(sa.len.i)!=sizeof(sa.len.s) && sa.len.i==0) 872 { 873 OPENSSL_assert(sa.len.s<=sizeof(sa.from)); 874 sa.len.i = (int)sa.len.s; 875 /* use sa.len.i from this point */ 876 } 877 if (ret == INVALID_SOCKET) 878 { 879 if(BIO_sock_should_retry(ret)) return -2; 880 SYSerr(SYS_F_ACCEPT,get_last_socket_error()); 881 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR); 882 goto end; 883 } 884 885 if (addr == NULL) goto end; 886 887 #ifdef EAI_FAMILY 888 do { 889 char h[NI_MAXHOST],s[NI_MAXSERV]; 890 size_t nl; 891 static union { void *p; 892 int (WSAAPI *f)(const struct sockaddr *,size_t/*socklen_t*/, 893 char *,size_t,char *,size_t,int); 894 } p_getnameinfo = {NULL}; 895 /* 2nd argument to getnameinfo is specified to 896 * be socklen_t. Unfortunately there is a number 897 * of environments where socklen_t is not defined. 898 * As it's passed by value, it's safe to pass it 899 * as size_t... <appro> */ 900 901 if (p_getnameinfo.p==NULL) 902 { 903 if ((p_getnameinfo.p=DSO_global_lookup("getnameinfo"))==NULL) 904 p_getnameinfo.p=(void*)-1; 905 } 906 if (p_getnameinfo.p==(void *)-1) break; 907 908 if ((*p_getnameinfo.f)(&sa.from.sa,sa.len.i,h,sizeof(h),s,sizeof(s), 909 NI_NUMERICHOST|NI_NUMERICSERV)) break; 910 nl = strlen(h)+strlen(s)+2; 911 p = *addr; 912 if (p) { *p = '\0'; p = OPENSSL_realloc(p,nl); } 913 else { p = OPENSSL_malloc(nl); } 914 if (p==NULL) 915 { 916 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE); 917 goto end; 918 } 919 *addr = p; 920 BIO_snprintf(*addr,nl,"%s:%s",h,s); 921 goto end; 922 } while(0); 923 #endif 924 if (sa.from.sa.sa_family != AF_INET) goto end; 925 l=ntohl(sa.from.sa_in.sin_addr.s_addr); 926 port=ntohs(sa.from.sa_in.sin_port); 927 if (*addr == NULL) 928 { 929 if ((p=OPENSSL_malloc(24)) == NULL) 930 { 931 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE); 932 goto end; 933 } 934 *addr=p; 935 } 936 BIO_snprintf(*addr,24,"%d.%d.%d.%d:%d", 937 (unsigned char)(l>>24L)&0xff, 938 (unsigned char)(l>>16L)&0xff, 939 (unsigned char)(l>> 8L)&0xff, 940 (unsigned char)(l )&0xff, 941 port); 942 end: 943 return(ret); 944 } 945 946 int BIO_set_tcp_ndelay(int s, int on) 947 { 948 int ret=0; 949 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP)) 950 int opt; 951 952 #ifdef SOL_TCP 953 opt=SOL_TCP; 954 #else 955 #ifdef IPPROTO_TCP 956 opt=IPPROTO_TCP; 957 #endif 958 #endif 959 960 ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on)); 961 #endif 962 return(ret == 0); 963 } 964 965 int BIO_socket_nbio(int s, int mode) 966 { 967 int ret= -1; 968 int l; 969 970 l=mode; 971 #ifdef FIONBIO 972 ret=BIO_socket_ioctl(s,FIONBIO,&l); 973 #endif 974 return(ret == 0); 975 } 976 #endif 977
