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 "bio.h" 67 68 /* BIOerr(BIO_F_WSASTARTUP,BIO_R_WSASTARTUP ); */ 69 70 #ifdef WIN16 71 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */ 72 #else 73 #define SOCKET_PROTOCOL IPPROTO_TCP 74 #endif 75 76 #ifdef SO_MAXCONN 77 #define MAX_LISTEN SOMAXCONN 78 #elif defined(SO_MAXCONN) 79 #define MAX_LISTEN SO_MAXCONN 80 #else 81 #define MAX_LISTEN 32 82 #endif 83 84 #ifdef WINDOWS 85 static int wsa_init_done=0; 86 #endif 87 88 static unsigned long BIO_ghbn_hits=0L; 89 static unsigned long BIO_ghbn_miss=0L; 90 91 #define GHBN_NUM 4 92 static struct ghbn_cache_st 93 { 94 char name[129]; 95 struct hostent *ent; 96 unsigned long order; 97 } ghbn_cache[GHBN_NUM]; 98 99 #ifndef NOPROTO 100 static int get_ip(char *str,unsigned char *ip); 101 static void ghbn_free(struct hostent *a); 102 static struct hostent *ghbn_dup(struct hostent *a); 103 #else 104 static int get_ip(); 105 static void ghbn_free(); 106 static struct hostent *ghbn_dup(); 107 #endif 108 109 int BIO_get_host_ip(str,ip) 110 char *str; 111 unsigned char *ip; 112 { 113 int i; 114 struct hostent *he; 115 116 i=get_ip(str,ip); 117 if (i > 0) return(1); 118 if (i < 0) 119 { 120 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS); 121 ERR_add_error_data(2,"host=",str); 122 return(0); 123 } 124 else 125 { /* do a gethostbyname */ 126 if (!BIO_sock_init()) return(0); 127 128 he=BIO_gethostbyname(str); 129 if (he == NULL) 130 { 131 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP); 132 ERR_add_error_data(2,"host=",str); 133 return(0); 134 } 135 136 /* cast to short because of win16 winsock definition */ 137 if ((short)he->h_addrtype != AF_INET) 138 { 139 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET); 140 ERR_add_error_data(2,"host=",str); 141 return(0); 142 } 143 for (i=0; i<4; i++) 144 ip[i]=he->h_addr_list[0][i]; 145 } 146 return(1); 147 } 148 149 int BIO_get_port(str,port_ptr) 150 char *str; 151 short *port_ptr; 152 { 153 int i; 154 struct servent *s; 155 156 if (str == NULL) 157 { 158 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED); 159 return(0); 160 } 161 i=atoi(str); 162 if (i != 0) 163 *port_ptr=(unsigned short)i; 164 else 165 { 166 s=getservbyname(str,"tcp"); 167 if (s == NULL) 168 { 169 if (strcmp(str,"http") == 0) 170 *port_ptr=80; 171 else if (strcmp(str,"telnet") == 0) 172 *port_ptr=23; 173 else if (strcmp(str,"socks") == 0) 174 *port_ptr=1080; 175 else if (strcmp(str,"https") == 0) 176 *port_ptr=443; 177 else if (strcmp(str,"ssl") == 0) 178 *port_ptr=443; 179 else if (strcmp(str,"ftp") == 0) 180 *port_ptr=21; 181 else if (strcmp(str,"gopher") == 0) 182 *port_ptr=70; 183 #if 0 184 else if (strcmp(str,"wais") == 0) 185 *port_ptr=21; 186 #endif 187 else 188 { 189 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error()); 190 ERR_add_error_data(3,"service='",str,"'"); 191 return(0); 192 } 193 return(1); 194 } 195 *port_ptr=htons((unsigned short)s->s_port); 196 } 197 return(1); 198 } 199 200 int BIO_sock_error(sock) 201 int sock; 202 { 203 int j,i,size; 204 205 size=sizeof(int); 206 207 i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(char *)&j,&size); 208 if (i < 0) 209 return(1); 210 else 211 return(j); 212 } 213 214 long BIO_ghbn_ctrl(cmd,iarg,parg) 215 int cmd; 216 int iarg; 217 char *parg; 218 { 219 int i; 220 char **p; 221 222 switch (cmd) 223 { 224 case BIO_GHBN_CTRL_HITS: 225 return(BIO_ghbn_hits); 226 break; 227 case BIO_GHBN_CTRL_MISSES: 228 return(BIO_ghbn_miss); 229 break; 230 case BIO_GHBN_CTRL_CACHE_SIZE: 231 return(GHBN_NUM); 232 break; 233 case BIO_GHBN_CTRL_GET_ENTRY: 234 if ((iarg >= 0) && (iarg <GHBN_NUM) && 235 (ghbn_cache[iarg].order > 0)) 236 { 237 p=(char **)parg; 238 if (p == NULL) return(0); 239 *p=ghbn_cache[iarg].name; 240 ghbn_cache[iarg].name[128]='\0'; 241 return(1); 242 } 243 return(0); 244 break; 245 case BIO_GHBN_CTRL_FLUSH: 246 for (i=0; i<GHBN_NUM; i++) 247 ghbn_cache[i].order=0; 248 break; 249 default: 250 return(0); 251 } 252 return(1); 253 } 254 255 static struct hostent *ghbn_dup(a) 256 struct hostent *a; 257 { 258 struct hostent *ret; 259 int i,j; 260 261 ret=(struct hostent *)malloc(sizeof(struct hostent)); 262 if (ret == NULL) return(NULL); 263 memset(ret,0,sizeof(struct hostent)); 264 265 for (i=0; a->h_aliases[i] != NULL; i++) 266 ; 267 i++; 268 ret->h_aliases=(char **)malloc(sizeof(char *)*i); 269 memset(ret->h_aliases,0,sizeof(char *)*i); 270 if (ret == NULL) goto err; 271 272 for (i=0; a->h_addr_list[i] != NULL; i++) 273 ; 274 i++; 275 ret->h_addr_list=(char **)malloc(sizeof(char *)*i); 276 memset(ret->h_addr_list,0,sizeof(char *)*i); 277 if (ret->h_addr_list == NULL) goto err; 278 279 j=strlen(a->h_name)+1; 280 if ((ret->h_name=malloc(j)) == NULL) goto err; 281 memcpy((char *)ret->h_name,a->h_name,j); 282 for (i=0; a->h_aliases[i] != NULL; i++) 283 { 284 j=strlen(a->h_aliases[i])+1; 285 if ((ret->h_aliases[i]=malloc(j)) == NULL) goto err; 286 memcpy(ret->h_aliases[i],a->h_aliases[i],j); 287 } 288 ret->h_length=a->h_length; 289 ret->h_addrtype=a->h_addrtype; 290 for (i=0; a->h_addr_list[i] != NULL; i++) 291 { 292 if ((ret->h_addr_list[i]=malloc(a->h_length)) == NULL) 293 goto err; 294 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length); 295 } 296 return(ret); 297 err: 298 if (ret != NULL) 299 ghbn_free(ret); 300 return(NULL); 301 } 302 303 static void ghbn_free(a) 304 struct hostent *a; 305 { 306 int i; 307 308 if (a->h_aliases != NULL) 309 { 310 for (i=0; a->h_aliases[i] != NULL; i++) 311 free(a->h_aliases[i]); 312 free(a->h_aliases); 313 } 314 if (a->h_addr_list != NULL) 315 { 316 for (i=0; a->h_addr_list[i] != NULL; i++) 317 free(a->h_addr_list[i]); 318 free(a->h_addr_list); 319 } 320 if (a->h_name != NULL) free((char *)a->h_name); 321 free(a); 322 } 323 324 struct hostent *BIO_gethostbyname(name) 325 char *name; 326 { 327 struct hostent *ret; 328 int i,lowi=0,j; 329 unsigned long low= (unsigned long)-1; 330 331 /* return(gethostbyname(name)); */ 332 333 CRYPTO_w_lock(CRYPTO_LOCK_BIO_GETHOSTBYNAME); 334 j=strlen(name); 335 if (j < 128) 336 { 337 for (i=0; i<GHBN_NUM; i++) 338 { 339 if (low > ghbn_cache[i].order) 340 { 341 low=ghbn_cache[i].order; 342 lowi=i; 343 } 344 if (ghbn_cache[i].order > 0) 345 { 346 if (strncmp(name,ghbn_cache[i].name,128) == 0) 347 break; 348 } 349 } 350 } 351 else 352 i=GHBN_NUM; 353 354 if (i == GHBN_NUM) /* no hit*/ 355 { 356 BIO_ghbn_miss++; 357 ret=gethostbyname(name); 358 359 if (ret == NULL) return(NULL); 360 if (j > 128) return(ret); /* too big to cache */ 361 362 /* else add to cache */ 363 if (ghbn_cache[lowi].ent != NULL) 364 ghbn_free(ghbn_cache[lowi].ent); 365 366 strncpy(ghbn_cache[lowi].name,name,128); 367 ghbn_cache[lowi].ent=ghbn_dup(ret); 368 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits; 369 } 370 else 371 { 372 BIO_ghbn_hits++; 373 ret= ghbn_cache[i].ent; 374 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits; 375 } 376 CRYPTO_w_unlock(CRYPTO_LOCK_BIO_GETHOSTBYNAME); 377 return(ret); 378 } 379 380 int BIO_sock_init() 381 { 382 #ifdef WINDOWS 383 static struct WSAData wsa_state; 384 385 if (!wsa_init_done) 386 { 387 int err; 388 389 #ifdef SIGINT 390 signal(SIGINT,(void (*)(int))BIO_sock_cleanup); 391 #endif 392 wsa_init_done=1; 393 memset(&wsa_state,0,sizeof(wsa_state)); 394 if (WSAStartup(0x0101,&wsa_state)!=0) 395 { 396 err=WSAGetLastError(); 397 SYSerr(SYS_F_WSASTARTUP,err); 398 BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP); 399 return(-1); 400 } 401 } 402 #endif /* WINDOWS */ 403 return(1); 404 } 405 406 void BIO_sock_cleanup() 407 { 408 #ifdef WINDOWS 409 if (wsa_init_done) 410 { 411 wsa_init_done=0; 412 WSACancelBlockingCall(); 413 WSACleanup(); 414 } 415 #endif 416 } 417 418 int BIO_socket_ioctl(fd,type,arg) 419 int fd; 420 long type; 421 unsigned long *arg; 422 { 423 int i; 424 425 i=ioctlsocket(fd,type,arg); 426 if (i < 0) 427 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error()); 428 return(i); 429 } 430 431 /* The reason I have implemented this instead of using sscanf is because 432 * Visual C 1.52c gives an unresolved external when linking a DLL :-( */ 433 static int get_ip(str,ip) 434 char *str; 435 unsigned char ip[4]; 436 { 437 unsigned int tmp[4]; 438 int num=0,c,ok=0; 439 440 tmp[0]=tmp[1]=tmp[2]=tmp[3]=0; 441 442 for (;;) 443 { 444 c= *(str++); 445 if ((c >= '0') && (c <= '9')) 446 { 447 ok=1; 448 tmp[num]=tmp[num]*10+c-'0'; 449 if (tmp[num] > 255) return(-1); 450 } 451 else if (c == '.') 452 { 453 if (!ok) return(-1); 454 if (num == 3) break; 455 num++; 456 ok=0; 457 } 458 else if ((num == 3) && ok) 459 break; 460 else 461 return(0); 462 } 463 ip[0]=tmp[0]; 464 ip[1]=tmp[1]; 465 ip[2]=tmp[2]; 466 ip[3]=tmp[3]; 467 return(1); 468 } 469 470 int BIO_get_accept_socket(host) 471 char *host; 472 { 473 int ret=0; 474 struct sockaddr_in server; 475 int s= -1; 476 unsigned char ip[4]; 477 short port; 478 char *str,*h,*p,*e; 479 unsigned long l; 480 481 if (!BIO_sock_init()) return(INVALID_SOCKET); 482 483 if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET); 484 485 h=p=NULL; 486 h=str; 487 for (e=str; *e; e++) 488 { 489 if (*e == ':') 490 { 491 p= &(e[1]); 492 *e='\0'; 493 } 494 else if (*e == '/') 495 { 496 *e='\0'; 497 break; 498 } 499 } 500 501 if (p == NULL) 502 { 503 p=h; 504 h="*"; 505 } 506 507 if (!BIO_get_port(p,&port)) return(INVALID_SOCKET); 508 509 memset((char *)&server,0,sizeof(server)); 510 server.sin_family=AF_INET; 511 server.sin_port=htons((unsigned short)port); 512 513 if (strcmp(h,"*") == 0) 514 server.sin_addr.s_addr=INADDR_ANY; 515 else 516 { 517 if (!BIO_get_host_ip(h,&(ip[0]))) return(INVALID_SOCKET); 518 l=(unsigned long) 519 ((unsigned long)ip[0]<<24L)| 520 ((unsigned long)ip[0]<<16L)| 521 ((unsigned long)ip[0]<< 8L)| 522 ((unsigned long)ip[0]); 523 server.sin_addr.s_addr=htonl(l); 524 } 525 526 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL); 527 if (s == INVALID_SOCKET) 528 { 529 SYSerr(SYS_F_SOCKET,get_last_socket_error()); 530 ERR_add_error_data(3,"port='",host,"'"); 531 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET); 532 goto err; 533 } 534 if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1) 535 { 536 SYSerr(SYS_F_BIND,get_last_socket_error()); 537 ERR_add_error_data(3,"port='",host,"'"); 538 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET); 539 goto err; 540 } 541 if (listen(s,MAX_LISTEN) == -1) 542 { 543 SYSerr(SYS_F_BIND,get_last_socket_error()); 544 ERR_add_error_data(3,"port='",host,"'"); 545 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET); 546 goto err; 547 } 548 ret=1; 549 err: 550 if (str != NULL) Free(str); 551 if ((ret == 0) && (s != INVALID_SOCKET)) 552 { 553 #ifdef WINDOWS 554 closesocket(s); 555 #else 556 close(s); 557 #endif 558 s= INVALID_SOCKET; 559 } 560 return(s); 561 } 562 563 int BIO_accept(sock,addr) 564 int sock; 565 char **addr; 566 { 567 int ret=INVALID_SOCKET; 568 static struct sockaddr_in from; 569 unsigned long l; 570 short port; 571 int len; 572 char *p; 573 574 memset((char *)&from,0,sizeof(from)); 575 len=sizeof(from); 576 ret=accept(sock,(struct sockaddr *)&from,&len); 577 if (ret == INVALID_SOCKET) 578 { 579 SYSerr(SYS_F_ACCEPT,get_last_socket_error()); 580 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR); 581 goto end; 582 } 583 584 if (addr == NULL) goto end; 585 586 l=ntohl(from.sin_addr.s_addr); 587 port=ntohs(from.sin_port); 588 if (*addr == NULL) 589 { 590 if ((p=Malloc(24)) == NULL) 591 { 592 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE); 593 goto end; 594 } 595 *addr=p; 596 } 597 sprintf(*addr,"%d.%d.%d.%d:%d", 598 (unsigned char)(l>>24L)&0xff, 599 (unsigned char)(l>>16L)&0xff, 600 (unsigned char)(l>> 8L)&0xff, 601 (unsigned char)(l )&0xff, 602 port); 603 end: 604 return(ret); 605 } 606 607 int BIO_set_tcp_ndelay(s,on) 608 int s; 609 int on; 610 { 611 int ret=0; 612 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP)) 613 int opt; 614 615 #ifdef SOL_TCP 616 opt=SOL_TCP; 617 #else 618 #ifdef IPPROTO_TCP 619 opt=IPPROTO_TCP; 620 #endif 621 #endif 622 623 ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on)); 624 #endif 625 return(ret == 0); 626 } 627 #endif 628 629