b_sock.c revision 296341
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#ifndef OPENSSL_NO_SOCK 73# include <openssl/dso.h> 74# define SOCKET_PROTOCOL IPPROTO_TCP 75# ifdef SO_MAXCONN 76# define MAX_LISTEN SO_MAXCONN 77# elif defined(SOMAXCONN) 78# define MAX_LISTEN SOMAXCONN 79# else 80# define MAX_LISTEN 32 81# endif 82# if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)) 83static int wsa_init_done = 0; 84# endif 85 86/* 87 * WSAAPI specifier is required to make indirect calls to run-time 88 * linked WinSock 2 functions used in this module, to be specific 89 * [get|free]addrinfo and getnameinfo. This is because WinSock uses 90 * uses non-C calling convention, __stdcall vs. __cdecl, on x86 91 * Windows. On non-WinSock platforms WSAAPI needs to be void. 92 */ 93# ifndef WSAAPI 94# define WSAAPI 95# endif 96 97# if 0 98static unsigned long BIO_ghbn_hits = 0L; 99static unsigned long BIO_ghbn_miss = 0L; 100 101# define GHBN_NUM 4 102static struct ghbn_cache_st { 103 char name[129]; 104 struct hostent *ent; 105 unsigned long order; 106} ghbn_cache[GHBN_NUM]; 107# endif 108 109static int get_ip(const char *str, unsigned char *ip); 110# if 0 111static void ghbn_free(struct hostent *a); 112static struct hostent *ghbn_dup(struct hostent *a); 113# endif 114int BIO_get_host_ip(const char *str, unsigned char *ip) 115{ 116 int i; 117 int err = 1; 118 int locked = 0; 119 struct hostent *he; 120 121 i = get_ip(str, ip); 122 if (i < 0) { 123 BIOerr(BIO_F_BIO_GET_HOST_IP, BIO_R_INVALID_IP_ADDRESS); 124 goto err; 125 } 126 127 /* 128 * At this point, we have something that is most probably correct in some 129 * way, so let's init the socket. 130 */ 131 if (BIO_sock_init() != 1) 132 return 0; /* don't generate another error code here */ 133 134 /* 135 * If the string actually contained an IP address, we need not do 136 * anything more 137 */ 138 if (i > 0) 139 return (1); 140 141 /* do a gethostbyname */ 142 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME); 143 locked = 1; 144 he = BIO_gethostbyname(str); 145 if (he == NULL) { 146 BIOerr(BIO_F_BIO_GET_HOST_IP, BIO_R_BAD_HOSTNAME_LOOKUP); 147 goto err; 148 } 149 150 /* cast to short because of win16 winsock definition */ 151 if ((short)he->h_addrtype != AF_INET) { 152 BIOerr(BIO_F_BIO_GET_HOST_IP, 153 BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET); 154 goto err; 155 } 156 for (i = 0; i < 4; i++) 157 ip[i] = he->h_addr_list[0][i]; 158 err = 0; 159 160 err: 161 if (locked) 162 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME); 163 if (err) { 164 ERR_add_error_data(2, "host=", str); 165 return 0; 166 } else 167 return 1; 168} 169 170int BIO_get_port(const char *str, unsigned short *port_ptr) 171{ 172 int i; 173 struct servent *s; 174 175 if (str == NULL) { 176 BIOerr(BIO_F_BIO_GET_PORT, BIO_R_NO_PORT_DEFINED); 177 return (0); 178 } 179 i = atoi(str); 180 if (i != 0) 181 *port_ptr = (unsigned short)i; 182 else { 183 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME); 184 /* 185 * Note: under VMS with SOCKETSHR, it seems like the first parameter 186 * is 'char *', instead of 'const char *' 187 */ 188# ifndef CONST_STRICT 189 s = getservbyname((char *)str, "tcp"); 190# else 191 s = getservbyname(str, "tcp"); 192# endif 193 if (s != NULL) 194 *port_ptr = ntohs((unsigned short)s->s_port); 195 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME); 196 if (s == NULL) { 197 if (strcmp(str, "http") == 0) 198 *port_ptr = 80; 199 else if (strcmp(str, "telnet") == 0) 200 *port_ptr = 23; 201 else if (strcmp(str, "socks") == 0) 202 *port_ptr = 1080; 203 else if (strcmp(str, "https") == 0) 204 *port_ptr = 443; 205 else if (strcmp(str, "ssl") == 0) 206 *port_ptr = 443; 207 else if (strcmp(str, "ftp") == 0) 208 *port_ptr = 21; 209 else if (strcmp(str, "gopher") == 0) 210 *port_ptr = 70; 211# if 0 212 else if (strcmp(str, "wais") == 0) 213 *port_ptr = 21; 214# endif 215 else { 216 SYSerr(SYS_F_GETSERVBYNAME, get_last_socket_error()); 217 ERR_add_error_data(3, "service='", str, "'"); 218 return (0); 219 } 220 } 221 } 222 return (1); 223} 224 225int BIO_sock_error(int sock) 226{ 227 int j, i; 228 int size; 229 230# if defined(OPENSSL_SYS_BEOS_R5) 231 return 0; 232# endif 233 234 size = sizeof(int); 235 /* 236 * Note: under Windows the third parameter is of type (char *) whereas 237 * under other systems it is (void *) if you don't have a cast it will 238 * choke the compiler: if you do have a cast then you can either go for 239 * (char *) or (void *). 240 */ 241 i = getsockopt(sock, SOL_SOCKET, SO_ERROR, (void *)&j, (void *)&size); 242 if (i < 0) 243 return (1); 244 else 245 return (j); 246} 247 248# if 0 249long BIO_ghbn_ctrl(int cmd, int iarg, char *parg) 250{ 251 int i; 252 char **p; 253 254 switch (cmd) { 255 case BIO_GHBN_CTRL_HITS: 256 return (BIO_ghbn_hits); 257 /* break; */ 258 case BIO_GHBN_CTRL_MISSES: 259 return (BIO_ghbn_miss); 260 /* break; */ 261 case BIO_GHBN_CTRL_CACHE_SIZE: 262 return (GHBN_NUM); 263 /* break; */ 264 case BIO_GHBN_CTRL_GET_ENTRY: 265 if ((iarg >= 0) && (iarg < GHBN_NUM) && (ghbn_cache[iarg].order > 0)) { 266 p = (char **)parg; 267 if (p == NULL) 268 return (0); 269 *p = ghbn_cache[iarg].name; 270 ghbn_cache[iarg].name[128] = '\0'; 271 return (1); 272 } 273 return (0); 274 /* break; */ 275 case BIO_GHBN_CTRL_FLUSH: 276 for (i = 0; i < GHBN_NUM; i++) 277 ghbn_cache[i].order = 0; 278 break; 279 default: 280 return (0); 281 } 282 return (1); 283} 284# endif 285 286# if 0 287static struct hostent *ghbn_dup(struct hostent *a) 288{ 289 struct hostent *ret; 290 int i, j; 291 292 MemCheck_off(); 293 ret = (struct hostent *)OPENSSL_malloc(sizeof(struct hostent)); 294 if (ret == NULL) 295 return (NULL); 296 memset(ret, 0, sizeof(struct hostent)); 297 298 for (i = 0; a->h_aliases[i] != NULL; i++) ; 299 i++; 300 ret->h_aliases = (char **)OPENSSL_malloc(i * sizeof(char *)); 301 if (ret->h_aliases == NULL) 302 goto err; 303 memset(ret->h_aliases, 0, i * sizeof(char *)); 304 305 for (i = 0; a->h_addr_list[i] != NULL; i++) ; 306 i++; 307 ret->h_addr_list = (char **)OPENSSL_malloc(i * sizeof(char *)); 308 if (ret->h_addr_list == NULL) 309 goto err; 310 memset(ret->h_addr_list, 0, i * sizeof(char *)); 311 312 j = strlen(a->h_name) + 1; 313 if ((ret->h_name = OPENSSL_malloc(j)) == NULL) 314 goto err; 315 memcpy((char *)ret->h_name, a->h_name, j); 316 for (i = 0; a->h_aliases[i] != NULL; i++) { 317 j = strlen(a->h_aliases[i]) + 1; 318 if ((ret->h_aliases[i] = OPENSSL_malloc(j)) == NULL) 319 goto err; 320 memcpy(ret->h_aliases[i], a->h_aliases[i], j); 321 } 322 ret->h_length = a->h_length; 323 ret->h_addrtype = a->h_addrtype; 324 for (i = 0; a->h_addr_list[i] != NULL; i++) { 325 if ((ret->h_addr_list[i] = OPENSSL_malloc(a->h_length)) == NULL) 326 goto err; 327 memcpy(ret->h_addr_list[i], a->h_addr_list[i], a->h_length); 328 } 329 if (0) { 330 err: 331 if (ret != NULL) 332 ghbn_free(ret); 333 ret = NULL; 334 } 335 MemCheck_on(); 336 return (ret); 337} 338 339static void ghbn_free(struct hostent *a) 340{ 341 int i; 342 343 if (a == NULL) 344 return; 345 346 if (a->h_aliases != NULL) { 347 for (i = 0; a->h_aliases[i] != NULL; i++) 348 OPENSSL_free(a->h_aliases[i]); 349 OPENSSL_free(a->h_aliases); 350 } 351 if (a->h_addr_list != NULL) { 352 for (i = 0; a->h_addr_list[i] != NULL; i++) 353 OPENSSL_free(a->h_addr_list[i]); 354 OPENSSL_free(a->h_addr_list); 355 } 356 if (a->h_name != NULL) 357 OPENSSL_free(a->h_name); 358 OPENSSL_free(a); 359} 360 361# endif 362 363struct hostent *BIO_gethostbyname(const char *name) 364{ 365# if 1 366 /* 367 * Caching gethostbyname() results forever is wrong, so we have to let 368 * the true gethostbyname() worry about this 369 */ 370# if (defined(NETWARE_BSDSOCK) && !defined(__NOVELL_LIBC__)) 371 return gethostbyname((char *)name); 372# else 373 return gethostbyname(name); 374# endif 375# else 376 struct hostent *ret; 377 int i, lowi = 0, j; 378 unsigned long low = (unsigned long)-1; 379 380# if 0 381 /* 382 * It doesn't make sense to use locking here: The function interface is 383 * not thread-safe, because threads can never be sure when some other 384 * thread destroys the data they were given a pointer to. 385 */ 386 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME); 387# endif 388 j = strlen(name); 389 if (j < 128) { 390 for (i = 0; i < GHBN_NUM; i++) { 391 if (low > ghbn_cache[i].order) { 392 low = ghbn_cache[i].order; 393 lowi = i; 394 } 395 if (ghbn_cache[i].order > 0) { 396 if (strncmp(name, ghbn_cache[i].name, 128) == 0) 397 break; 398 } 399 } 400 } else 401 i = GHBN_NUM; 402 403 if (i == GHBN_NUM) { /* no hit */ 404 BIO_ghbn_miss++; 405 /* 406 * Note: under VMS with SOCKETSHR, it seems like the first parameter 407 * is 'char *', instead of 'const char *' 408 */ 409# ifndef CONST_STRICT 410 ret = gethostbyname((char *)name); 411# else 412 ret = gethostbyname(name); 413# endif 414 415 if (ret == NULL) 416 goto end; 417 if (j > 128) { /* too big to cache */ 418# if 0 419 /* 420 * If we were trying to make this function thread-safe (which is 421 * bound to fail), we'd have to give up in this case (or allocate 422 * more memory). 423 */ 424 ret = NULL; 425# endif 426 goto end; 427 } 428 429 /* else add to cache */ 430 if (ghbn_cache[lowi].ent != NULL) 431 ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */ 432 ghbn_cache[lowi].name[0] = '\0'; 433 434 if ((ret = ghbn_cache[lowi].ent = ghbn_dup(ret)) == NULL) { 435 BIOerr(BIO_F_BIO_GETHOSTBYNAME, ERR_R_MALLOC_FAILURE); 436 goto end; 437 } 438 strncpy(ghbn_cache[lowi].name, name, 128); 439 ghbn_cache[lowi].order = BIO_ghbn_miss + BIO_ghbn_hits; 440 } else { 441 BIO_ghbn_hits++; 442 ret = ghbn_cache[i].ent; 443 ghbn_cache[i].order = BIO_ghbn_miss + BIO_ghbn_hits; 444 } 445 end: 446# if 0 447 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME); 448# endif 449 return (ret); 450# endif 451} 452 453int BIO_sock_init(void) 454{ 455# ifdef OPENSSL_SYS_WINDOWS 456 static struct WSAData wsa_state; 457 458 if (!wsa_init_done) { 459 int err; 460 461 wsa_init_done = 1; 462 memset(&wsa_state, 0, sizeof(wsa_state)); 463 /* 464 * Not making wsa_state available to the rest of the code is formally 465 * wrong. But the structures we use are [beleived to be] invariable 466 * among Winsock DLLs, while API availability is [expected to be] 467 * probed at run-time with DSO_global_lookup. 468 */ 469 if (WSAStartup(0x0202, &wsa_state) != 0) { 470 err = WSAGetLastError(); 471 SYSerr(SYS_F_WSASTARTUP, err); 472 BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP); 473 return (-1); 474 } 475 } 476# endif /* OPENSSL_SYS_WINDOWS */ 477# ifdef WATT32 478 extern int _watt_do_exit; 479 _watt_do_exit = 0; /* don't make sock_init() call exit() */ 480 if (sock_init()) 481 return (-1); 482# endif 483 484# if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK) 485 WORD wVerReq; 486 WSADATA wsaData; 487 int err; 488 489 if (!wsa_init_done) { 490 wsa_init_done = 1; 491 wVerReq = MAKEWORD(2, 0); 492 err = WSAStartup(wVerReq, &wsaData); 493 if (err != 0) { 494 SYSerr(SYS_F_WSASTARTUP, err); 495 BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP); 496 return (-1); 497 } 498 } 499# endif 500 501 return (1); 502} 503 504void BIO_sock_cleanup(void) 505{ 506# ifdef OPENSSL_SYS_WINDOWS 507 if (wsa_init_done) { 508 wsa_init_done = 0; 509# if 0 /* this call is claimed to be non-present in 510 * Winsock2 */ 511 WSACancelBlockingCall(); 512# endif 513 WSACleanup(); 514 } 515# elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK) 516 if (wsa_init_done) { 517 wsa_init_done = 0; 518 WSACleanup(); 519 } 520# endif 521} 522 523# if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000 524 525int BIO_socket_ioctl(int fd, long type, void *arg) 526{ 527 int i; 528 529# ifdef __DJGPP__ 530 i = ioctlsocket(fd, type, (char *)arg); 531# else 532# if defined(OPENSSL_SYS_VMS) 533 /*- 534 * 2011-02-18 SMS. 535 * VMS ioctl() can't tolerate a 64-bit "void *arg", but we 536 * observe that all the consumers pass in an "unsigned long *", 537 * so we arrange a local copy with a short pointer, and use 538 * that, instead. 539 */ 540# if __INITIAL_POINTER_SIZE == 64 541# define ARG arg_32p 542# pragma pointer_size save 543# pragma pointer_size 32 544 unsigned long arg_32; 545 unsigned long *arg_32p; 546# pragma pointer_size restore 547 arg_32p = &arg_32; 548 arg_32 = *((unsigned long *)arg); 549# else /* __INITIAL_POINTER_SIZE == 64 */ 550# define ARG arg 551# endif /* __INITIAL_POINTER_SIZE == 64 [else] */ 552# else /* defined(OPENSSL_SYS_VMS) */ 553# define ARG arg 554# endif /* defined(OPENSSL_SYS_VMS) [else] */ 555 556 i = ioctlsocket(fd, type, ARG); 557# endif /* __DJGPP__ */ 558 if (i < 0) 559 SYSerr(SYS_F_IOCTLSOCKET, get_last_socket_error()); 560 return (i); 561} 562# endif /* __VMS_VER */ 563 564/* 565 * The reason I have implemented this instead of using sscanf is because 566 * Visual C 1.52c gives an unresolved external when linking a DLL :-( 567 */ 568static int get_ip(const char *str, unsigned char ip[4]) 569{ 570 unsigned int tmp[4]; 571 int num = 0, c, ok = 0; 572 573 tmp[0] = tmp[1] = tmp[2] = tmp[3] = 0; 574 575 for (;;) { 576 c = *(str++); 577 if ((c >= '0') && (c <= '9')) { 578 ok = 1; 579 tmp[num] = tmp[num] * 10 + c - '0'; 580 if (tmp[num] > 255) 581 return (0); 582 } else if (c == '.') { 583 if (!ok) 584 return (-1); 585 if (num == 3) 586 return (0); 587 num++; 588 ok = 0; 589 } else if (c == '\0' && (num == 3) && ok) 590 break; 591 else 592 return (0); 593 } 594 ip[0] = tmp[0]; 595 ip[1] = tmp[1]; 596 ip[2] = tmp[2]; 597 ip[3] = tmp[3]; 598 return (1); 599} 600 601int BIO_get_accept_socket(char *host, int bind_mode) 602{ 603 int ret = 0; 604 union { 605 struct sockaddr sa; 606 struct sockaddr_in sa_in; 607# if OPENSSL_USE_IPV6 608 struct sockaddr_in6 sa_in6; 609# endif 610 } server, client; 611 int s = INVALID_SOCKET, cs, addrlen; 612 unsigned char ip[4]; 613 unsigned short port; 614 char *str = NULL, *e; 615 char *h, *p; 616 unsigned long l; 617 int err_num; 618 619 if (BIO_sock_init() != 1) 620 return (INVALID_SOCKET); 621 622 if ((str = BUF_strdup(host)) == NULL) 623 return (INVALID_SOCKET); 624 625 h = p = NULL; 626 h = str; 627 for (e = str; *e; e++) { 628 if (*e == ':') { 629 p = e; 630 } else if (*e == '/') { 631 *e = '\0'; 632 break; 633 } 634 } 635 if (p) 636 *p++ = '\0'; /* points at last ':', '::port' is special 637 * [see below] */ 638 else 639 p = h, h = NULL; 640 641# ifdef EAI_FAMILY 642 do { 643 static union { 644 void *p; 645 int (WSAAPI *f) (const char *, const char *, 646 const struct addrinfo *, struct addrinfo **); 647 } p_getaddrinfo = { 648 NULL 649 }; 650 static union { 651 void *p; 652 void (WSAAPI *f) (struct addrinfo *); 653 } p_freeaddrinfo = { 654 NULL 655 }; 656 struct addrinfo *res, hint; 657 658 if (p_getaddrinfo.p == NULL) { 659 if ((p_getaddrinfo.p = DSO_global_lookup("getaddrinfo")) == NULL 660 || (p_freeaddrinfo.p = 661 DSO_global_lookup("freeaddrinfo")) == NULL) 662 p_getaddrinfo.p = (void *)-1; 663 } 664 if (p_getaddrinfo.p == (void *)-1) 665 break; 666 667 /* 668 * '::port' enforces IPv6 wildcard listener. Some OSes, e.g. Solaris, 669 * default to IPv6 without any hint. Also note that commonly IPv6 670 * wildchard socket can service IPv4 connections just as well... 671 */ 672 memset(&hint, 0, sizeof(hint)); 673 hint.ai_flags = AI_PASSIVE; 674 if (h) { 675 if (strchr(h, ':')) { 676 if (h[1] == '\0') 677 h = NULL; 678# if OPENSSL_USE_IPV6 679 hint.ai_family = AF_INET6; 680# else 681 h = NULL; 682# endif 683 } else if (h[0] == '*' && h[1] == '\0') { 684 hint.ai_family = AF_INET; 685 h = NULL; 686 } 687 } 688 689 if ((*p_getaddrinfo.f) (h, p, &hint, &res)) 690 break; 691 692 addrlen = res->ai_addrlen <= sizeof(server) ? 693 res->ai_addrlen : sizeof(server); 694 memcpy(&server, res->ai_addr, addrlen); 695 696 (*p_freeaddrinfo.f) (res); 697 goto again; 698 } while (0); 699# endif 700 701 if (!BIO_get_port(p, &port)) 702 goto err; 703 704 memset((char *)&server, 0, sizeof(server)); 705 server.sa_in.sin_family = AF_INET; 706 server.sa_in.sin_port = htons(port); 707 addrlen = sizeof(server.sa_in); 708 709 if (h == NULL || strcmp(h, "*") == 0) 710 server.sa_in.sin_addr.s_addr = INADDR_ANY; 711 else { 712 if (!BIO_get_host_ip(h, &(ip[0]))) 713 goto err; 714 l = (unsigned long) 715 ((unsigned long)ip[0] << 24L) | 716 ((unsigned long)ip[1] << 16L) | 717 ((unsigned long)ip[2] << 8L) | ((unsigned long)ip[3]); 718 server.sa_in.sin_addr.s_addr = htonl(l); 719 } 720 721 again: 722 s = socket(server.sa.sa_family, SOCK_STREAM, SOCKET_PROTOCOL); 723 if (s == INVALID_SOCKET) { 724 SYSerr(SYS_F_SOCKET, get_last_socket_error()); 725 ERR_add_error_data(3, "port='", host, "'"); 726 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET, BIO_R_UNABLE_TO_CREATE_SOCKET); 727 goto err; 728 } 729# ifdef SO_REUSEADDR 730 if (bind_mode == BIO_BIND_REUSEADDR) { 731 int i = 1; 732 733 ret = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&i, sizeof(i)); 734 bind_mode = BIO_BIND_NORMAL; 735 } 736# endif 737 if (bind(s, &server.sa, addrlen) == -1) { 738# ifdef SO_REUSEADDR 739 err_num = get_last_socket_error(); 740 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) && 741# ifdef OPENSSL_SYS_WINDOWS 742 /* 743 * Some versions of Windows define EADDRINUSE to a dummy value. 744 */ 745 (err_num == WSAEADDRINUSE)) 746# else 747 (err_num == EADDRINUSE)) 748# endif 749 { 750 client = server; 751 if (h == NULL || strcmp(h, "*") == 0) { 752# if OPENSSL_USE_IPV6 753 if (client.sa.sa_family == AF_INET6) { 754 memset(&client.sa_in6.sin6_addr, 0, 755 sizeof(client.sa_in6.sin6_addr)); 756 client.sa_in6.sin6_addr.s6_addr[15] = 1; 757 } else 758# endif 759 if (client.sa.sa_family == AF_INET) { 760 client.sa_in.sin_addr.s_addr = htonl(0x7F000001); 761 } else 762 goto err; 763 } 764 cs = socket(client.sa.sa_family, SOCK_STREAM, SOCKET_PROTOCOL); 765 if (cs != INVALID_SOCKET) { 766 int ii; 767 ii = connect(cs, &client.sa, addrlen); 768 closesocket(cs); 769 if (ii == INVALID_SOCKET) { 770 bind_mode = BIO_BIND_REUSEADDR; 771 closesocket(s); 772 goto again; 773 } 774 /* else error */ 775 } 776 /* else error */ 777 } 778# endif 779 SYSerr(SYS_F_BIND, err_num); 780 ERR_add_error_data(3, "port='", host, "'"); 781 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET, BIO_R_UNABLE_TO_BIND_SOCKET); 782 goto err; 783 } 784 if (listen(s, MAX_LISTEN) == -1) { 785 SYSerr(SYS_F_BIND, get_last_socket_error()); 786 ERR_add_error_data(3, "port='", host, "'"); 787 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET, BIO_R_UNABLE_TO_LISTEN_SOCKET); 788 goto err; 789 } 790 ret = 1; 791 err: 792 if (str != NULL) 793 OPENSSL_free(str); 794 if ((ret == 0) && (s != INVALID_SOCKET)) { 795 closesocket(s); 796 s = INVALID_SOCKET; 797 } 798 return (s); 799} 800 801int BIO_accept(int sock, char **addr) 802{ 803 int ret = INVALID_SOCKET; 804 unsigned long l; 805 unsigned short port; 806 char *p; 807 808 struct { 809 /* 810 * As for following union. Trouble is that there are platforms 811 * that have socklen_t and there are platforms that don't, on 812 * some platforms socklen_t is int and on some size_t. So what 813 * one can do? One can cook #ifdef spaghetti, which is nothing 814 * but masochistic. Or one can do union between int and size_t. 815 * One naturally does it primarily for 64-bit platforms where 816 * sizeof(int) != sizeof(size_t). But would it work? Note that 817 * if size_t member is initialized to 0, then later int member 818 * assignment naturally does the job on little-endian platforms 819 * regardless accept's expectations! What about big-endians? 820 * If accept expects int*, then it works, and if size_t*, then 821 * length value would appear as unreasonably large. But this 822 * won't prevent it from filling in the address structure. The 823 * trouble of course would be if accept returns more data than 824 * actual buffer can accomodate and overwrite stack... That's 825 * where early OPENSSL_assert comes into picture. Besides, the 826 * only 64-bit big-endian platform found so far that expects 827 * size_t* is HP-UX, where stack grows towards higher address. 828 * <appro> 829 */ 830 union { 831 size_t s; 832 int i; 833 } len; 834 union { 835 struct sockaddr sa; 836 struct sockaddr_in sa_in; 837# if OPENSSL_USE_IPV6 838 struct sockaddr_in6 sa_in6; 839# endif 840 } from; 841 } sa; 842 843 sa.len.s = 0; 844 sa.len.i = sizeof(sa.from); 845 memset(&sa.from, 0, sizeof(sa.from)); 846 ret = accept(sock, &sa.from.sa, (void *)&sa.len); 847 if (sizeof(sa.len.i) != sizeof(sa.len.s) && sa.len.i == 0) { 848 OPENSSL_assert(sa.len.s <= sizeof(sa.from)); 849 sa.len.i = (int)sa.len.s; 850 /* use sa.len.i from this point */ 851 } 852 if (ret == INVALID_SOCKET) { 853 if (BIO_sock_should_retry(ret)) 854 return -2; 855 SYSerr(SYS_F_ACCEPT, get_last_socket_error()); 856 BIOerr(BIO_F_BIO_ACCEPT, BIO_R_ACCEPT_ERROR); 857 goto end; 858 } 859 860 if (addr == NULL) 861 goto end; 862 863# ifdef EAI_FAMILY 864 do { 865 char h[NI_MAXHOST], s[NI_MAXSERV]; 866 size_t nl; 867 static union { 868 void *p; 869 int (WSAAPI *f) (const struct sockaddr *, size_t /* socklen_t */ , 870 char *, size_t, char *, size_t, int); 871 } p_getnameinfo = { 872 NULL 873 }; 874 /* 875 * 2nd argument to getnameinfo is specified to be socklen_t. 876 * Unfortunately there is a number of environments where socklen_t is 877 * not defined. As it's passed by value, it's safe to pass it as 878 * size_t... <appro> 879 */ 880 881 if (p_getnameinfo.p == NULL) { 882 if ((p_getnameinfo.p = DSO_global_lookup("getnameinfo")) == NULL) 883 p_getnameinfo.p = (void *)-1; 884 } 885 if (p_getnameinfo.p == (void *)-1) 886 break; 887 888 if ((*p_getnameinfo.f) (&sa.from.sa, sa.len.i, h, sizeof(h), s, 889 sizeof(s), NI_NUMERICHOST | NI_NUMERICSERV)) 890 break; 891 nl = strlen(h) + strlen(s) + 2; 892 p = *addr; 893 if (p) { 894 *p = '\0'; 895 p = OPENSSL_realloc(p, nl); 896 } else { 897 p = OPENSSL_malloc(nl); 898 } 899 if (p == NULL) { 900 BIOerr(BIO_F_BIO_ACCEPT, ERR_R_MALLOC_FAILURE); 901 goto end; 902 } 903 *addr = p; 904 BIO_snprintf(*addr, nl, "%s:%s", h, s); 905 goto end; 906 } while (0); 907# endif 908 if (sa.from.sa.sa_family != AF_INET) 909 goto end; 910 l = ntohl(sa.from.sa_in.sin_addr.s_addr); 911 port = ntohs(sa.from.sa_in.sin_port); 912 if (*addr == NULL) { 913 if ((p = OPENSSL_malloc(24)) == NULL) { 914 BIOerr(BIO_F_BIO_ACCEPT, ERR_R_MALLOC_FAILURE); 915 goto end; 916 } 917 *addr = p; 918 } 919 BIO_snprintf(*addr, 24, "%d.%d.%d.%d:%d", 920 (unsigned char)(l >> 24L) & 0xff, 921 (unsigned char)(l >> 16L) & 0xff, 922 (unsigned char)(l >> 8L) & 0xff, 923 (unsigned char)(l) & 0xff, port); 924 end: 925 return (ret); 926} 927 928int BIO_set_tcp_ndelay(int s, int on) 929{ 930 int ret = 0; 931# if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP)) 932 int opt; 933 934# ifdef SOL_TCP 935 opt = SOL_TCP; 936# else 937# ifdef IPPROTO_TCP 938 opt = IPPROTO_TCP; 939# endif 940# endif 941 942 ret = setsockopt(s, opt, TCP_NODELAY, (char *)&on, sizeof(on)); 943# endif 944 return (ret == 0); 945} 946 947int BIO_socket_nbio(int s, int mode) 948{ 949 int ret = -1; 950 int l; 951 952 l = mode; 953# ifdef FIONBIO 954 ret = BIO_socket_ioctl(s, FIONBIO, &l); 955# endif 956 return (ret == 0); 957} 958#endif 959