b_sock.c revision 89837
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#ifndef NO_SOCK 60 61#include <stdio.h> 62#include <stdlib.h> 63#include <errno.h> 64#define USE_SOCKETS 65#include "cryptlib.h" 66#include <openssl/bio.h> 67 68#ifdef WIN16 69#define SOCKET_PROTOCOL 0 /* more microsoft stupidity */ 70#else 71#define SOCKET_PROTOCOL IPPROTO_TCP 72#endif 73 74#ifdef SO_MAXCONN 75#define MAX_LISTEN SOMAXCONN 76#elif defined(SO_MAXCONN) 77#define MAX_LISTEN SO_MAXCONN 78#else 79#define MAX_LISTEN 32 80#endif 81 82#ifdef WINDOWS 83static int wsa_init_done=0; 84#endif 85 86static unsigned long BIO_ghbn_hits=0L; 87static unsigned long BIO_ghbn_miss=0L; 88 89#define GHBN_NUM 4 90static struct ghbn_cache_st 91 { 92 char name[129]; 93 struct hostent *ent; 94 unsigned long order; 95 } ghbn_cache[GHBN_NUM]; 96 97static int get_ip(const char *str,unsigned char *ip); 98#if 0 99static void ghbn_free(struct hostent *a); 100static struct hostent *ghbn_dup(struct hostent *a); 101#endif 102int BIO_get_host_ip(const char *str, unsigned char *ip) 103 { 104 int i; 105 int err = 1; 106 int locked = 0; 107 struct hostent *he; 108 109 i=get_ip(str,ip); 110 if (i < 0) 111 { 112 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS); 113 goto err; 114 } 115 116 /* At this point, we have something that is most probably correct 117 in some way, so let's init the socket. */ 118 if (BIO_sock_init() != 1) 119 return 0; /* don't generate another error code here */ 120 121 /* If the string actually contained an IP address, we need not do 122 anything more */ 123 if (i > 0) return(1); 124 125 /* do a gethostbyname */ 126 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME); 127 locked = 1; 128 he=BIO_gethostbyname(str); 129 if (he == NULL) 130 { 131 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP); 132 goto err; 133 } 134 135 /* cast to short because of win16 winsock definition */ 136 if ((short)he->h_addrtype != AF_INET) 137 { 138 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET); 139 goto err; 140 } 141 for (i=0; i<4; i++) 142 ip[i]=he->h_addr_list[0][i]; 143 err = 0; 144 145 err: 146 if (locked) 147 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME); 148 if (err) 149 { 150 ERR_add_error_data(2,"host=",str); 151 return 0; 152 } 153 else 154 return 1; 155 } 156 157int BIO_get_port(const char *str, unsigned short *port_ptr) 158 { 159 int i; 160 struct servent *s; 161 162 if (str == NULL) 163 { 164 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED); 165 return(0); 166 } 167 i=atoi(str); 168 if (i != 0) 169 *port_ptr=(unsigned short)i; 170 else 171 { 172 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME); 173 /* Note: under VMS with SOCKETSHR, it seems like the first 174 * parameter is 'char *', instead of 'const char *' 175 */ 176 s=getservbyname( 177#ifndef CONST_STRICT 178 (char *) 179#endif 180 str,"tcp"); 181 if(s != NULL) 182 *port_ptr=ntohs((unsigned short)s->s_port); 183 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME); 184 if(s == NULL) 185 { 186 if (strcmp(str,"http") == 0) 187 *port_ptr=80; 188 else if (strcmp(str,"telnet") == 0) 189 *port_ptr=23; 190 else if (strcmp(str,"socks") == 0) 191 *port_ptr=1080; 192 else if (strcmp(str,"https") == 0) 193 *port_ptr=443; 194 else if (strcmp(str,"ssl") == 0) 195 *port_ptr=443; 196 else if (strcmp(str,"ftp") == 0) 197 *port_ptr=21; 198 else if (strcmp(str,"gopher") == 0) 199 *port_ptr=70; 200#if 0 201 else if (strcmp(str,"wais") == 0) 202 *port_ptr=21; 203#endif 204 else 205 { 206 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error()); 207 ERR_add_error_data(3,"service='",str,"'"); 208 return(0); 209 } 210 } 211 } 212 return(1); 213 } 214 215int BIO_sock_error(int sock) 216 { 217 int j,i; 218 int size; 219 220 size=sizeof(int); 221 /* Note: under Windows the third parameter is of type (char *) 222 * whereas under other systems it is (void *) if you don't have 223 * a cast it will choke the compiler: if you do have a cast then 224 * you can either go for (char *) or (void *). 225 */ 226 i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size); 227 if (i < 0) 228 return(1); 229 else 230 return(j); 231 } 232 233long BIO_ghbn_ctrl(int cmd, int iarg, char *parg) 234 { 235 int i; 236 char **p; 237 238 switch (cmd) 239 { 240 case BIO_GHBN_CTRL_HITS: 241 return(BIO_ghbn_hits); 242 /* break; */ 243 case BIO_GHBN_CTRL_MISSES: 244 return(BIO_ghbn_miss); 245 /* break; */ 246 case BIO_GHBN_CTRL_CACHE_SIZE: 247 return(GHBN_NUM); 248 /* break; */ 249 case BIO_GHBN_CTRL_GET_ENTRY: 250 if ((iarg >= 0) && (iarg <GHBN_NUM) && 251 (ghbn_cache[iarg].order > 0)) 252 { 253 p=(char **)parg; 254 if (p == NULL) return(0); 255 *p=ghbn_cache[iarg].name; 256 ghbn_cache[iarg].name[128]='\0'; 257 return(1); 258 } 259 return(0); 260 /* break; */ 261 case BIO_GHBN_CTRL_FLUSH: 262 for (i=0; i<GHBN_NUM; i++) 263 ghbn_cache[i].order=0; 264 break; 265 default: 266 return(0); 267 } 268 return(1); 269 } 270 271#if 0 272static struct hostent *ghbn_dup(struct hostent *a) 273 { 274 struct hostent *ret; 275 int i,j; 276 277 MemCheck_off(); 278 ret=(struct hostent *)OPENSSL_malloc(sizeof(struct hostent)); 279 if (ret == NULL) return(NULL); 280 memset(ret,0,sizeof(struct hostent)); 281 282 for (i=0; a->h_aliases[i] != NULL; i++) 283 ; 284 i++; 285 ret->h_aliases = (char **)OPENSSL_malloc(i*sizeof(char *)); 286 if (ret->h_aliases == NULL) 287 goto err; 288 memset(ret->h_aliases, 0, i*sizeof(char *)); 289 290 for (i=0; a->h_addr_list[i] != NULL; i++) 291 ; 292 i++; 293 ret->h_addr_list=(char **)OPENSSL_malloc(i*sizeof(char *)); 294 if (ret->h_addr_list == NULL) 295 goto err; 296 memset(ret->h_addr_list, 0, i*sizeof(char *)); 297 298 j=strlen(a->h_name)+1; 299 if ((ret->h_name=OPENSSL_malloc(j)) == NULL) goto err; 300 memcpy((char *)ret->h_name,a->h_name,j); 301 for (i=0; a->h_aliases[i] != NULL; i++) 302 { 303 j=strlen(a->h_aliases[i])+1; 304 if ((ret->h_aliases[i]=OPENSSL_malloc(j)) == NULL) goto err; 305 memcpy(ret->h_aliases[i],a->h_aliases[i],j); 306 } 307 ret->h_length=a->h_length; 308 ret->h_addrtype=a->h_addrtype; 309 for (i=0; a->h_addr_list[i] != NULL; i++) 310 { 311 if ((ret->h_addr_list[i]=OPENSSL_malloc(a->h_length)) == NULL) 312 goto err; 313 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length); 314 } 315 if (0) 316 { 317err: 318 if (ret != NULL) 319 ghbn_free(ret); 320 ret=NULL; 321 } 322 MemCheck_on(); 323 return(ret); 324 } 325 326static void ghbn_free(struct hostent *a) 327 { 328 int i; 329 330 if(a == NULL) 331 return; 332 333 if (a->h_aliases != NULL) 334 { 335 for (i=0; a->h_aliases[i] != NULL; i++) 336 OPENSSL_free(a->h_aliases[i]); 337 OPENSSL_free(a->h_aliases); 338 } 339 if (a->h_addr_list != NULL) 340 { 341 for (i=0; a->h_addr_list[i] != NULL; i++) 342 OPENSSL_free(a->h_addr_list[i]); 343 OPENSSL_free(a->h_addr_list); 344 } 345 if (a->h_name != NULL) OPENSSL_free(a->h_name); 346 OPENSSL_free(a); 347 } 348#endif 349 350struct hostent *BIO_gethostbyname(const char *name) 351 { 352#if 1 353 /* Caching gethostbyname() results forever is wrong, 354 * so we have to let the true gethostbyname() worry about this */ 355 return gethostbyname(name); 356#else 357 struct hostent *ret; 358 int i,lowi=0,j; 359 unsigned long low= (unsigned long)-1; 360 361 362# if 0 363 /* It doesn't make sense to use locking here: The function interface 364 * is not thread-safe, because threads can never be sure when 365 * some other thread destroys the data they were given a pointer to. 366 */ 367 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME); 368# endif 369 j=strlen(name); 370 if (j < 128) 371 { 372 for (i=0; i<GHBN_NUM; i++) 373 { 374 if (low > ghbn_cache[i].order) 375 { 376 low=ghbn_cache[i].order; 377 lowi=i; 378 } 379 if (ghbn_cache[i].order > 0) 380 { 381 if (strncmp(name,ghbn_cache[i].name,128) == 0) 382 break; 383 } 384 } 385 } 386 else 387 i=GHBN_NUM; 388 389 if (i == GHBN_NUM) /* no hit*/ 390 { 391 BIO_ghbn_miss++; 392 /* Note: under VMS with SOCKETSHR, it seems like the first 393 * parameter is 'char *', instead of 'const char *' 394 */ 395 ret=gethostbyname( 396# ifndef CONST_STRICT 397 (char *) 398# endif 399 name); 400 401 if (ret == NULL) 402 goto end; 403 if (j > 128) /* too big to cache */ 404 { 405# if 0 406 /* If we were trying to make this function thread-safe (which 407 * is bound to fail), we'd have to give up in this case 408 * (or allocate more memory). */ 409 ret = NULL; 410# endif 411 goto end; 412 } 413 414 /* else add to cache */ 415 if (ghbn_cache[lowi].ent != NULL) 416 ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */ 417 ghbn_cache[lowi].name[0] = '\0'; 418 419 if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL) 420 { 421 BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE); 422 goto end; 423 } 424 strncpy(ghbn_cache[lowi].name,name,128); 425 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits; 426 } 427 else 428 { 429 BIO_ghbn_hits++; 430 ret= ghbn_cache[i].ent; 431 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits; 432 } 433end: 434# if 0 435 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME); 436# endif 437 return(ret); 438#endif 439 } 440 441 442int BIO_sock_init(void) 443 { 444#ifdef WINDOWS 445 static struct WSAData wsa_state; 446 447 if (!wsa_init_done) 448 { 449 int err; 450 451#ifdef SIGINT 452 signal(SIGINT,(void (*)(int))BIO_sock_cleanup); 453#endif 454 wsa_init_done=1; 455 memset(&wsa_state,0,sizeof(wsa_state)); 456 if (WSAStartup(0x0101,&wsa_state)!=0) 457 { 458 err=WSAGetLastError(); 459 SYSerr(SYS_F_WSASTARTUP,err); 460 BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP); 461 return(-1); 462 } 463 } 464#endif /* WINDOWS */ 465 return(1); 466 } 467 468void BIO_sock_cleanup(void) 469 { 470#ifdef WINDOWS 471 if (wsa_init_done) 472 { 473 wsa_init_done=0; 474 WSACancelBlockingCall(); 475 WSACleanup(); 476 } 477#endif 478 } 479 480#if !defined(VMS) || __VMS_VER >= 70000000 481 482int BIO_socket_ioctl(int fd, long type, unsigned long *arg) 483 { 484 int i; 485 486 i=ioctlsocket(fd,type,arg); 487 if (i < 0) 488 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error()); 489 return(i); 490 } 491#endif /* __VMS_VER */ 492 493/* The reason I have implemented this instead of using sscanf is because 494 * Visual C 1.52c gives an unresolved external when linking a DLL :-( */ 495static int get_ip(const char *str, unsigned char ip[4]) 496 { 497 unsigned int tmp[4]; 498 int num=0,c,ok=0; 499 500 tmp[0]=tmp[1]=tmp[2]=tmp[3]=0; 501 502 for (;;) 503 { 504 c= *(str++); 505 if ((c >= '0') && (c <= '9')) 506 { 507 ok=1; 508 tmp[num]=tmp[num]*10+c-'0'; 509 if (tmp[num] > 255) return(-1); 510 } 511 else if (c == '.') 512 { 513 if (!ok) return(-1); 514 if (num == 3) break; 515 num++; 516 ok=0; 517 } 518 else if ((num == 3) && ok) 519 break; 520 else 521 return(0); 522 } 523 ip[0]=tmp[0]; 524 ip[1]=tmp[1]; 525 ip[2]=tmp[2]; 526 ip[3]=tmp[3]; 527 return(1); 528 } 529 530int BIO_get_accept_socket(char *host, int bind_mode) 531 { 532 int ret=0; 533 struct sockaddr_in server,client; 534 int s=INVALID_SOCKET,cs; 535 unsigned char ip[4]; 536 unsigned short port; 537 char *str=NULL,*e; 538 const char *h,*p; 539 unsigned long l; 540 int err_num; 541 542 if (BIO_sock_init() != 1) return(INVALID_SOCKET); 543 544 if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET); 545 546 h=p=NULL; 547 h=str; 548 for (e=str; *e; e++) 549 { 550 if (*e == ':') 551 { 552 p= &(e[1]); 553 *e='\0'; 554 } 555 else if (*e == '/') 556 { 557 *e='\0'; 558 break; 559 } 560 } 561 562 if (p == NULL) 563 { 564 p=h; 565 h="*"; 566 } 567 568 if (!BIO_get_port(p,&port)) goto err; 569 570 memset((char *)&server,0,sizeof(server)); 571 server.sin_family=AF_INET; 572 server.sin_port=htons(port); 573 574 if (strcmp(h,"*") == 0) 575 server.sin_addr.s_addr=INADDR_ANY; 576 else 577 { 578 if (!BIO_get_host_ip(h,&(ip[0]))) goto err; 579 l=(unsigned long) 580 ((unsigned long)ip[0]<<24L)| 581 ((unsigned long)ip[1]<<16L)| 582 ((unsigned long)ip[2]<< 8L)| 583 ((unsigned long)ip[3]); 584 server.sin_addr.s_addr=htonl(l); 585 } 586 587again: 588 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL); 589 if (s == INVALID_SOCKET) 590 { 591 SYSerr(SYS_F_SOCKET,get_last_socket_error()); 592 ERR_add_error_data(3,"port='",host,"'"); 593 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET); 594 goto err; 595 } 596 597#ifdef SO_REUSEADDR 598 if (bind_mode == BIO_BIND_REUSEADDR) 599 { 600 int i=1; 601 602 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i)); 603 bind_mode=BIO_BIND_NORMAL; 604 } 605#endif 606 if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1) 607 { 608#ifdef SO_REUSEADDR 609 err_num=get_last_socket_error(); 610 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) && 611 (err_num == EADDRINUSE)) 612 { 613 memcpy((char *)&client,(char *)&server,sizeof(server)); 614 if (strcmp(h,"*") == 0) 615 client.sin_addr.s_addr=htonl(0x7F000001); 616 cs=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL); 617 if (cs != INVALID_SOCKET) 618 { 619 int ii; 620 ii=connect(cs,(struct sockaddr *)&client, 621 sizeof(client)); 622 closesocket(cs); 623 if (ii == INVALID_SOCKET) 624 { 625 bind_mode=BIO_BIND_REUSEADDR; 626 closesocket(s); 627 goto again; 628 } 629 /* else error */ 630 } 631 /* else error */ 632 } 633#endif 634 SYSerr(SYS_F_BIND,err_num); 635 ERR_add_error_data(3,"port='",host,"'"); 636 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET); 637 goto err; 638 } 639 if (listen(s,MAX_LISTEN) == -1) 640 { 641 SYSerr(SYS_F_BIND,get_last_socket_error()); 642 ERR_add_error_data(3,"port='",host,"'"); 643 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET); 644 goto err; 645 } 646 ret=1; 647err: 648 if (str != NULL) OPENSSL_free(str); 649 if ((ret == 0) && (s != INVALID_SOCKET)) 650 { 651 closesocket(s); 652 s= INVALID_SOCKET; 653 } 654 return(s); 655 } 656 657int BIO_accept(int sock, char **addr) 658 { 659 int ret=INVALID_SOCKET; 660 static struct sockaddr_in from; 661 unsigned long l; 662 unsigned short port; 663 int len; 664 char *p; 665 666 memset((char *)&from,0,sizeof(from)); 667 len=sizeof(from); 668 /* Note: under VMS with SOCKETSHR the fourth parameter is currently 669 * of type (int *) whereas under other systems it is (void *) if 670 * you don't have a cast it will choke the compiler: if you do 671 * have a cast then you can either go for (int *) or (void *). 672 */ 673 ret=accept(sock,(struct sockaddr *)&from,(void *)&len); 674 if (ret == INVALID_SOCKET) 675 { 676 SYSerr(SYS_F_ACCEPT,get_last_socket_error()); 677 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR); 678 goto end; 679 } 680 681 if (addr == NULL) goto end; 682 683 l=ntohl(from.sin_addr.s_addr); 684 port=ntohs(from.sin_port); 685 if (*addr == NULL) 686 { 687 if ((p=OPENSSL_malloc(24)) == NULL) 688 { 689 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE); 690 goto end; 691 } 692 *addr=p; 693 } 694 sprintf(*addr,"%d.%d.%d.%d:%d", 695 (unsigned char)(l>>24L)&0xff, 696 (unsigned char)(l>>16L)&0xff, 697 (unsigned char)(l>> 8L)&0xff, 698 (unsigned char)(l )&0xff, 699 port); 700end: 701 return(ret); 702 } 703 704int BIO_set_tcp_ndelay(int s, int on) 705 { 706 int ret=0; 707#if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP)) 708 int opt; 709 710#ifdef SOL_TCP 711 opt=SOL_TCP; 712#else 713#ifdef IPPROTO_TCP 714 opt=IPPROTO_TCP; 715#endif 716#endif 717 718 ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on)); 719#endif 720 return(ret == 0); 721 } 722#endif 723 724int BIO_socket_nbio(int s, int mode) 725 { 726 int ret= -1; 727 unsigned long l; 728 729 l=mode; 730#ifdef FIONBIO 731 ret=BIO_socket_ioctl(s,FIONBIO,&l); 732#endif 733 return(ret == 0); 734 } 735