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