1 /* apps/s_socket.c - socket-related functions used by s_client and s_server */ 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 <string.h> 62 #include <errno.h> 63 #include <signal.h> 64 65 #ifdef FLAT_INC 66 #include "e_os2.h" 67 #else 68 #include "../e_os2.h" 69 #endif 70 71 /* With IPv6, it looks like Digital has mixed up the proper order of 72 recursive header file inclusion, resulting in the compiler complaining 73 that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which 74 is needed to have fileno() declared correctly... So let's define u_int */ 75 #if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT) 76 #define __U_INT 77 typedef unsigned int u_int; 78 #endif 79 80 #define USE_SOCKETS 81 #define NON_MAIN 82 #include "apps.h" 83 #undef USE_SOCKETS 84 #undef NON_MAIN 85 #include "s_apps.h" 86 #include <openssl/ssl.h> 87 88 #ifdef FLAT_INC 89 #include "e_os.h" 90 #else 91 #include "../e_os.h" 92 #endif 93 94 #ifndef OPENSSL_NO_SOCK 95 96 #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK) 97 #include "netdb.h" 98 #endif 99 100 static struct hostent *GetHostByName(char *name); 101 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)) 102 static void ssl_sock_cleanup(void); 103 #endif 104 static int ssl_sock_init(void); 105 static int init_client_ip(int *sock,unsigned char ip[4], int port, int type); 106 static int init_server(int *sock, int port, int type); 107 static int init_server_long(int *sock, int port,char *ip, int type); 108 static int do_accept(int acc_sock, int *sock, char **host); 109 static int host_ip(char *str, unsigned char ip[4]); 110 111 #ifdef OPENSSL_SYS_WIN16 112 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */ 113 #else 114 #define SOCKET_PROTOCOL IPPROTO_TCP 115 #endif 116 117 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK) 118 static int wsa_init_done=0; 119 #endif 120 121 #ifdef OPENSSL_SYS_WINDOWS 122 static struct WSAData wsa_state; 123 static int wsa_init_done=0; 124 125 #ifdef OPENSSL_SYS_WIN16 126 static HWND topWnd=0; 127 static FARPROC lpTopWndProc=NULL; 128 static FARPROC lpTopHookProc=NULL; 129 extern HINSTANCE _hInstance; /* nice global CRT provides */ 130 131 static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam, 132 LPARAM lParam) 133 { 134 if (hwnd == topWnd) 135 { 136 switch(message) 137 { 138 case WM_DESTROY: 139 case WM_CLOSE: 140 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc); 141 ssl_sock_cleanup(); 142 break; 143 } 144 } 145 return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam); 146 } 147 148 static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam) 149 { 150 topWnd=hwnd; 151 return(FALSE); 152 } 153 154 #endif /* OPENSSL_SYS_WIN32 */ 155 #endif /* OPENSSL_SYS_WINDOWS */ 156 157 #ifdef OPENSSL_SYS_WINDOWS 158 static void ssl_sock_cleanup(void) 159 { 160 if (wsa_init_done) 161 { 162 wsa_init_done=0; 163 #ifndef OPENSSL_SYS_WINCE 164 WSACancelBlockingCall(); 165 #endif 166 WSACleanup(); 167 } 168 } 169 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK) 170 static void sock_cleanup(void) 171 { 172 if (wsa_init_done) 173 { 174 wsa_init_done=0; 175 WSACleanup(); 176 } 177 } 178 #endif 179 180 static int ssl_sock_init(void) 181 { 182 #ifdef WATT32 183 extern int _watt_do_exit; 184 _watt_do_exit = 0; 185 if (sock_init()) 186 return (0); 187 #elif defined(OPENSSL_SYS_WINDOWS) 188 if (!wsa_init_done) 189 { 190 int err; 191 192 #ifdef SIGINT 193 signal(SIGINT,(void (*)(int))ssl_sock_cleanup); 194 #endif 195 wsa_init_done=1; 196 memset(&wsa_state,0,sizeof(wsa_state)); 197 if (WSAStartup(0x0101,&wsa_state)!=0) 198 { 199 err=WSAGetLastError(); 200 BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err); 201 return(0); 202 } 203 204 #ifdef OPENSSL_SYS_WIN16 205 EnumTaskWindows(GetCurrentTask(),enumproc,0L); 206 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC); 207 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance); 208 209 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc); 210 #endif /* OPENSSL_SYS_WIN16 */ 211 } 212 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK) 213 WORD wVerReq; 214 WSADATA wsaData; 215 int err; 216 217 if (!wsa_init_done) 218 { 219 220 # ifdef SIGINT 221 signal(SIGINT,(void (*)(int))sock_cleanup); 222 # endif 223 224 wsa_init_done=1; 225 wVerReq = MAKEWORD( 2, 0 ); 226 err = WSAStartup(wVerReq,&wsaData); 227 if (err != 0) 228 { 229 BIO_printf(bio_err,"unable to start WINSOCK2, error code=%d\n",err); 230 return(0); 231 } 232 } 233 #endif /* OPENSSL_SYS_WINDOWS */ 234 return(1); 235 } 236 237 int init_client(int *sock, char *host, int port, int type) 238 { 239 unsigned char ip[4]; 240 short p=0; 241 242 if (!host_ip(host,&(ip[0]))) 243 { 244 return(0); 245 } 246 if (p != 0) port=p; 247 return(init_client_ip(sock,ip,port,type)); 248 } 249 250 static int init_client_ip(int *sock, unsigned char ip[4], int port, int type) 251 { 252 unsigned long addr; 253 struct sockaddr_in them; 254 int s,i; 255 256 if (!ssl_sock_init()) return(0); 257 258 memset((char *)&them,0,sizeof(them)); 259 them.sin_family=AF_INET; 260 them.sin_port=htons((unsigned short)port); 261 addr=(unsigned long) 262 ((unsigned long)ip[0]<<24L)| 263 ((unsigned long)ip[1]<<16L)| 264 ((unsigned long)ip[2]<< 8L)| 265 ((unsigned long)ip[3]); 266 them.sin_addr.s_addr=htonl(addr); 267 268 if (type == SOCK_STREAM) 269 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL); 270 else /* ( type == SOCK_DGRAM) */ 271 s=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP); 272 273 if (s == INVALID_SOCKET) { perror("socket"); return(0); } 274 275 #ifndef OPENSSL_SYS_MPE 276 if (type == SOCK_STREAM) 277 { 278 i=0; 279 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i)); 280 if (i < 0) { perror("keepalive"); return(0); } 281 } 282 #endif 283 284 if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1) 285 { close(s); perror("connect"); return(0); } 286 *sock=s; 287 return(1); 288 } 289 290 int do_server(int port, int type, int *ret, int (*cb)(char *hostname, int s, unsigned char *context), unsigned char *context) 291 { 292 int sock; 293 char *name = NULL; 294 int accept_socket; 295 int i; 296 297 if (!init_server(&accept_socket,port,type)) return(0); 298 299 if (ret != NULL) 300 { 301 *ret=accept_socket; 302 /* return(1);*/ 303 } 304 for (;;) 305 { 306 if (type==SOCK_STREAM) 307 { 308 if (do_accept(accept_socket,&sock,&name) == 0) 309 { 310 SHUTDOWN(accept_socket); 311 return(0); 312 } 313 } 314 else 315 sock = accept_socket; 316 i=(*cb)(name,sock, context); 317 if (name != NULL) OPENSSL_free(name); 318 if (type==SOCK_STREAM) 319 SHUTDOWN2(sock); 320 if (i < 0) 321 { 322 SHUTDOWN2(accept_socket); 323 return(i); 324 } 325 } 326 } 327 328 static int init_server_long(int *sock, int port, char *ip, int type) 329 { 330 int ret=0; 331 struct sockaddr_in server; 332 int s= -1,i; 333 334 if (!ssl_sock_init()) return(0); 335 336 memset((char *)&server,0,sizeof(server)); 337 server.sin_family=AF_INET; 338 server.sin_port=htons((unsigned short)port); 339 if (ip == NULL) 340 server.sin_addr.s_addr=INADDR_ANY; 341 else 342 /* Added for T3E, address-of fails on bit field (beckman (at) acl.lanl.gov) */ 343 #ifndef BIT_FIELD_LIMITS 344 memcpy(&server.sin_addr.s_addr,ip,4); 345 #else 346 memcpy(&server.sin_addr,ip,4); 347 #endif 348 349 if (type == SOCK_STREAM) 350 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL); 351 else /* type == SOCK_DGRAM */ 352 s=socket(AF_INET, SOCK_DGRAM,IPPROTO_UDP); 353 354 if (s == INVALID_SOCKET) goto err; 355 #if defined SOL_SOCKET && defined SO_REUSEADDR 356 { 357 int j = 1; 358 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, 359 (void *) &j, sizeof j); 360 } 361 #endif 362 if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1) 363 { 364 #ifndef OPENSSL_SYS_WINDOWS 365 perror("bind"); 366 #endif 367 goto err; 368 } 369 /* Make it 128 for linux */ 370 if (type==SOCK_STREAM && listen(s,128) == -1) goto err; 371 i=0; 372 *sock=s; 373 ret=1; 374 err: 375 if ((ret == 0) && (s != -1)) 376 { 377 SHUTDOWN(s); 378 } 379 return(ret); 380 } 381 382 static int init_server(int *sock, int port, int type) 383 { 384 return(init_server_long(sock, port, NULL, type)); 385 } 386 387 static int do_accept(int acc_sock, int *sock, char **host) 388 { 389 int ret,i; 390 struct hostent *h1,*h2; 391 static struct sockaddr_in from; 392 int len; 393 /* struct linger ling; */ 394 395 if (!ssl_sock_init()) return(0); 396 397 #ifndef OPENSSL_SYS_WINDOWS 398 redoit: 399 #endif 400 401 memset((char *)&from,0,sizeof(from)); 402 len=sizeof(from); 403 /* Note: under VMS with SOCKETSHR the fourth parameter is currently 404 * of type (int *) whereas under other systems it is (void *) if 405 * you don't have a cast it will choke the compiler: if you do 406 * have a cast then you can either go for (int *) or (void *). 407 */ 408 ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len); 409 if (ret == INVALID_SOCKET) 410 { 411 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)) 412 i=WSAGetLastError(); 413 BIO_printf(bio_err,"accept error %d\n",i); 414 #else 415 if (errno == EINTR) 416 { 417 /*check_timeout(); */ 418 goto redoit; 419 } 420 fprintf(stderr,"errno=%d ",errno); 421 perror("accept"); 422 #endif 423 return(0); 424 } 425 426 /* 427 ling.l_onoff=1; 428 ling.l_linger=0; 429 i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling)); 430 if (i < 0) { perror("linger"); return(0); } 431 i=0; 432 i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i)); 433 if (i < 0) { perror("keepalive"); return(0); } 434 */ 435 436 if (host == NULL) goto end; 437 #ifndef BIT_FIELD_LIMITS 438 /* I should use WSAAsyncGetHostByName() under windows */ 439 h1=gethostbyaddr((char *)&from.sin_addr.s_addr, 440 sizeof(from.sin_addr.s_addr),AF_INET); 441 #else 442 h1=gethostbyaddr((char *)&from.sin_addr, 443 sizeof(struct in_addr),AF_INET); 444 #endif 445 if (h1 == NULL) 446 { 447 BIO_printf(bio_err,"bad gethostbyaddr\n"); 448 *host=NULL; 449 /* return(0); */ 450 } 451 else 452 { 453 if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL) 454 { 455 perror("OPENSSL_malloc"); 456 return(0); 457 } 458 BUF_strlcpy(*host,h1->h_name,strlen(h1->h_name)+1); 459 460 h2=GetHostByName(*host); 461 if (h2 == NULL) 462 { 463 BIO_printf(bio_err,"gethostbyname failure\n"); 464 return(0); 465 } 466 i=0; 467 if (h2->h_addrtype != AF_INET) 468 { 469 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n"); 470 return(0); 471 } 472 } 473 end: 474 *sock=ret; 475 return(1); 476 } 477 478 int extract_host_port(char *str, char **host_ptr, unsigned char *ip, 479 short *port_ptr) 480 { 481 char *h,*p; 482 483 h=str; 484 p=strchr(str,':'); 485 if (p == NULL) 486 { 487 BIO_printf(bio_err,"no port defined\n"); 488 return(0); 489 } 490 *(p++)='\0'; 491 492 if ((ip != NULL) && !host_ip(str,ip)) 493 goto err; 494 if (host_ptr != NULL) *host_ptr=h; 495 496 if (!extract_port(p,port_ptr)) 497 goto err; 498 return(1); 499 err: 500 return(0); 501 } 502 503 static int host_ip(char *str, unsigned char ip[4]) 504 { 505 unsigned int in[4]; 506 int i; 507 508 if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4) 509 { 510 for (i=0; i<4; i++) 511 if (in[i] > 255) 512 { 513 BIO_printf(bio_err,"invalid IP address\n"); 514 goto err; 515 } 516 ip[0]=in[0]; 517 ip[1]=in[1]; 518 ip[2]=in[2]; 519 ip[3]=in[3]; 520 } 521 else 522 { /* do a gethostbyname */ 523 struct hostent *he; 524 525 if (!ssl_sock_init()) return(0); 526 527 he=GetHostByName(str); 528 if (he == NULL) 529 { 530 BIO_printf(bio_err,"gethostbyname failure\n"); 531 goto err; 532 } 533 /* cast to short because of win16 winsock definition */ 534 if ((short)he->h_addrtype != AF_INET) 535 { 536 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n"); 537 return(0); 538 } 539 ip[0]=he->h_addr_list[0][0]; 540 ip[1]=he->h_addr_list[0][1]; 541 ip[2]=he->h_addr_list[0][2]; 542 ip[3]=he->h_addr_list[0][3]; 543 } 544 return(1); 545 err: 546 return(0); 547 } 548 549 int extract_port(char *str, short *port_ptr) 550 { 551 int i; 552 struct servent *s; 553 554 i=atoi(str); 555 if (i != 0) 556 *port_ptr=(unsigned short)i; 557 else 558 { 559 s=getservbyname(str,"tcp"); 560 if (s == NULL) 561 { 562 BIO_printf(bio_err,"getservbyname failure for %s\n",str); 563 return(0); 564 } 565 *port_ptr=ntohs((unsigned short)s->s_port); 566 } 567 return(1); 568 } 569 570 #define GHBN_NUM 4 571 static struct ghbn_cache_st 572 { 573 char name[128]; 574 struct hostent ent; 575 unsigned long order; 576 } ghbn_cache[GHBN_NUM]; 577 578 static unsigned long ghbn_hits=0L; 579 static unsigned long ghbn_miss=0L; 580 581 static struct hostent *GetHostByName(char *name) 582 { 583 struct hostent *ret; 584 int i,lowi=0; 585 unsigned long low= (unsigned long)-1; 586 587 for (i=0; i<GHBN_NUM; i++) 588 { 589 if (low > ghbn_cache[i].order) 590 { 591 low=ghbn_cache[i].order; 592 lowi=i; 593 } 594 if (ghbn_cache[i].order > 0) 595 { 596 if (strncmp(name,ghbn_cache[i].name,128) == 0) 597 break; 598 } 599 } 600 if (i == GHBN_NUM) /* no hit*/ 601 { 602 ghbn_miss++; 603 ret=gethostbyname(name); 604 if (ret == NULL) return(NULL); 605 /* else add to cache */ 606 if(strlen(name) < sizeof ghbn_cache[0].name) 607 { 608 strcpy(ghbn_cache[lowi].name,name); 609 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent)); 610 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits; 611 } 612 return(ret); 613 } 614 else 615 { 616 ghbn_hits++; 617 ret= &(ghbn_cache[i].ent); 618 ghbn_cache[i].order=ghbn_miss+ghbn_hits; 619 return(ret); 620 } 621 } 622 623 #endif 624
