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]; 240 241 if (!host_ip(host,&(ip[0]))) 242 { 243 return(0); 244 } 245 return(init_client_ip(sock,ip,port,type)); 246 } 247 248 static int init_client_ip(int *sock, unsigned char ip[4], int port, int type) 249 { 250 unsigned long addr; 251 struct sockaddr_in them; 252 int s,i; 253 254 if (!ssl_sock_init()) return(0); 255 256 memset((char *)&them,0,sizeof(them)); 257 them.sin_family=AF_INET; 258 them.sin_port=htons((unsigned short)port); 259 addr=(unsigned long) 260 ((unsigned long)ip[0]<<24L)| 261 ((unsigned long)ip[1]<<16L)| 262 ((unsigned long)ip[2]<< 8L)| 263 ((unsigned long)ip[3]); 264 them.sin_addr.s_addr=htonl(addr); 265 266 if (type == SOCK_STREAM) 267 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL); 268 else /* ( type == SOCK_DGRAM) */ 269 s=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP); 270 271 if (s == INVALID_SOCKET) { perror("socket"); return(0); } 272 273 #if defined(SO_KEEPALIVE) && !defined(OPENSSL_SYS_MPE) 274 if (type == SOCK_STREAM) 275 { 276 i=0; 277 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i)); 278 if (i < 0) { perror("keepalive"); return(0); } 279 } 280 #endif 281 282 if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1) 283 { closesocket(s); perror("connect"); return(0); } 284 *sock=s; 285 return(1); 286 } 287 288 int do_server(int port, int type, int *ret, int (*cb)(char *hostname, int s, unsigned char *context), unsigned char *context) 289 { 290 int sock; 291 char *name = NULL; 292 int accept_socket = 0; 293 int i; 294 295 if (!init_server(&accept_socket,port,type)) return(0); 296 297 if (ret != NULL) 298 { 299 *ret=accept_socket; 300 /* return(1);*/ 301 } 302 for (;;) 303 { 304 if (type==SOCK_STREAM) 305 { 306 if (do_accept(accept_socket,&sock,&name) == 0) 307 { 308 SHUTDOWN(accept_socket); 309 return(0); 310 } 311 } 312 else 313 sock = accept_socket; 314 i=(*cb)(name,sock, context); 315 if (name != NULL) OPENSSL_free(name); 316 if (type==SOCK_STREAM) 317 SHUTDOWN2(sock); 318 if (i < 0) 319 { 320 SHUTDOWN2(accept_socket); 321 return(i); 322 } 323 } 324 } 325 326 static int init_server_long(int *sock, int port, char *ip, int type) 327 { 328 int ret=0; 329 struct sockaddr_in server; 330 int s= -1,i; 331 332 if (!ssl_sock_init()) return(0); 333 334 memset((char *)&server,0,sizeof(server)); 335 server.sin_family=AF_INET; 336 server.sin_port=htons((unsigned short)port); 337 if (ip == NULL) 338 server.sin_addr.s_addr=INADDR_ANY; 339 else 340 /* Added for T3E, address-of fails on bit field (beckman (at) acl.lanl.gov) */ 341 #ifndef BIT_FIELD_LIMITS 342 memcpy(&server.sin_addr.s_addr,ip,4); 343 #else 344 memcpy(&server.sin_addr,ip,4); 345 #endif 346 347 if (type == SOCK_STREAM) 348 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL); 349 else /* type == SOCK_DGRAM */ 350 s=socket(AF_INET, SOCK_DGRAM,IPPROTO_UDP); 351 352 if (s == INVALID_SOCKET) goto err; 353 #if defined SOL_SOCKET && defined SO_REUSEADDR 354 { 355 int j = 1; 356 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, 357 (void *) &j, sizeof j); 358 } 359 #endif 360 if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1) 361 { 362 #ifndef OPENSSL_SYS_WINDOWS 363 perror("bind"); 364 #endif 365 goto err; 366 } 367 /* Make it 128 for linux */ 368 if (type==SOCK_STREAM && listen(s,128) == -1) goto err; 369 i=0; 370 *sock=s; 371 ret=1; 372 err: 373 if ((ret == 0) && (s != -1)) 374 { 375 SHUTDOWN(s); 376 } 377 return(ret); 378 } 379 380 static int init_server(int *sock, int port, int type) 381 { 382 return(init_server_long(sock, port, NULL, type)); 383 } 384 385 static int do_accept(int acc_sock, int *sock, char **host) 386 { 387 int ret,i; 388 struct hostent *h1,*h2; 389 static struct sockaddr_in from; 390 int len; 391 /* struct linger ling; */ 392 393 if (!ssl_sock_init()) return(0); 394 395 #ifndef OPENSSL_SYS_WINDOWS 396 redoit: 397 #endif 398 399 memset((char *)&from,0,sizeof(from)); 400 len=sizeof(from); 401 /* Note: under VMS with SOCKETSHR the fourth parameter is currently 402 * of type (int *) whereas under other systems it is (void *) if 403 * you don't have a cast it will choke the compiler: if you do 404 * have a cast then you can either go for (int *) or (void *). 405 */ 406 ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len); 407 if (ret == INVALID_SOCKET) 408 { 409 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)) 410 i=WSAGetLastError(); 411 BIO_printf(bio_err,"accept error %d\n",i); 412 #else 413 if (errno == EINTR) 414 { 415 /*check_timeout(); */ 416 goto redoit; 417 } 418 fprintf(stderr,"errno=%d ",errno); 419 perror("accept"); 420 #endif 421 return(0); 422 } 423 424 /* 425 ling.l_onoff=1; 426 ling.l_linger=0; 427 i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling)); 428 if (i < 0) { perror("linger"); return(0); } 429 i=0; 430 i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i)); 431 if (i < 0) { perror("keepalive"); return(0); } 432 */ 433 434 if (host == NULL) goto end; 435 #ifndef BIT_FIELD_LIMITS 436 /* I should use WSAAsyncGetHostByName() under windows */ 437 h1=gethostbyaddr((char *)&from.sin_addr.s_addr, 438 sizeof(from.sin_addr.s_addr),AF_INET); 439 #else 440 h1=gethostbyaddr((char *)&from.sin_addr, 441 sizeof(struct in_addr),AF_INET); 442 #endif 443 if (h1 == NULL) 444 { 445 BIO_printf(bio_err,"bad gethostbyaddr\n"); 446 *host=NULL; 447 /* return(0); */ 448 } 449 else 450 { 451 if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL) 452 { 453 perror("OPENSSL_malloc"); 454 return(0); 455 } 456 BUF_strlcpy(*host,h1->h_name,strlen(h1->h_name)+1); 457 458 h2=GetHostByName(*host); 459 if (h2 == NULL) 460 { 461 BIO_printf(bio_err,"gethostbyname failure\n"); 462 return(0); 463 } 464 i=0; 465 if (h2->h_addrtype != AF_INET) 466 { 467 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n"); 468 return(0); 469 } 470 } 471 end: 472 *sock=ret; 473 return(1); 474 } 475 476 int extract_host_port(char *str, char **host_ptr, unsigned char *ip, 477 short *port_ptr) 478 { 479 char *h,*p; 480 481 h=str; 482 p=strchr(str,':'); 483 if (p == NULL) 484 { 485 BIO_printf(bio_err,"no port defined\n"); 486 return(0); 487 } 488 *(p++)='\0'; 489 490 if ((ip != NULL) && !host_ip(str,ip)) 491 goto err; 492 if (host_ptr != NULL) *host_ptr=h; 493 494 if (!extract_port(p,port_ptr)) 495 goto err; 496 return(1); 497 err: 498 return(0); 499 } 500 501 static int host_ip(char *str, unsigned char ip[4]) 502 { 503 unsigned int in[4]; 504 int i; 505 506 if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4) 507 { 508 for (i=0; i<4; i++) 509 if (in[i] > 255) 510 { 511 BIO_printf(bio_err,"invalid IP address\n"); 512 goto err; 513 } 514 ip[0]=in[0]; 515 ip[1]=in[1]; 516 ip[2]=in[2]; 517 ip[3]=in[3]; 518 } 519 else 520 { /* do a gethostbyname */ 521 struct hostent *he; 522 523 if (!ssl_sock_init()) return(0); 524 525 he=GetHostByName(str); 526 if (he == NULL) 527 { 528 BIO_printf(bio_err,"gethostbyname failure\n"); 529 goto err; 530 } 531 /* cast to short because of win16 winsock definition */ 532 if ((short)he->h_addrtype != AF_INET) 533 { 534 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n"); 535 return(0); 536 } 537 ip[0]=he->h_addr_list[0][0]; 538 ip[1]=he->h_addr_list[0][1]; 539 ip[2]=he->h_addr_list[0][2]; 540 ip[3]=he->h_addr_list[0][3]; 541 } 542 return(1); 543 err: 544 return(0); 545 } 546 547 int extract_port(char *str, short *port_ptr) 548 { 549 int i; 550 struct servent *s; 551 552 i=atoi(str); 553 if (i != 0) 554 *port_ptr=(unsigned short)i; 555 else 556 { 557 s=getservbyname(str,"tcp"); 558 if (s == NULL) 559 { 560 BIO_printf(bio_err,"getservbyname failure for %s\n",str); 561 return(0); 562 } 563 *port_ptr=ntohs((unsigned short)s->s_port); 564 } 565 return(1); 566 } 567 568 #define GHBN_NUM 4 569 static struct ghbn_cache_st 570 { 571 char name[128]; 572 struct hostent ent; 573 unsigned long order; 574 } ghbn_cache[GHBN_NUM]; 575 576 static unsigned long ghbn_hits=0L; 577 static unsigned long ghbn_miss=0L; 578 579 static struct hostent *GetHostByName(char *name) 580 { 581 struct hostent *ret; 582 int i,lowi=0; 583 unsigned long low= (unsigned long)-1; 584 585 for (i=0; i<GHBN_NUM; i++) 586 { 587 if (low > ghbn_cache[i].order) 588 { 589 low=ghbn_cache[i].order; 590 lowi=i; 591 } 592 if (ghbn_cache[i].order > 0) 593 { 594 if (strncmp(name,ghbn_cache[i].name,128) == 0) 595 break; 596 } 597 } 598 if (i == GHBN_NUM) /* no hit*/ 599 { 600 ghbn_miss++; 601 ret=gethostbyname(name); 602 if (ret == NULL) return(NULL); 603 /* else add to cache */ 604 if(strlen(name) < sizeof ghbn_cache[0].name) 605 { 606 strcpy(ghbn_cache[lowi].name,name); 607 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent)); 608 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits; 609 } 610 return(ret); 611 } 612 else 613 { 614 ghbn_hits++; 615 ret= &(ghbn_cache[i].ent); 616 ghbn_cache[i].order=ghbn_miss+ghbn_hits; 617 return(ret); 618 } 619 } 620 621 #endif 622
