1/* apps/s_socket.c - socket-related functions used by s_client and s_server */ 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#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 77typedef 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 100static struct hostent *GetHostByName(char *name); 101#if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)) 102static void ssl_sock_cleanup(void); 103#endif 104static int ssl_sock_init(void); 105static int init_client_ip(int *sock,unsigned char ip[4], int port, int type); 106static int init_server(int *sock, int port, int type); 107static int init_server_long(int *sock, int port,char *ip, int type); 108static int do_accept(int acc_sock, int *sock, char **host); 109static 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) 118static int wsa_init_done=0; 119#endif 120 121#ifdef OPENSSL_SYS_WINDOWS 122static struct WSAData wsa_state; 123static int wsa_init_done=0; 124 125#ifdef OPENSSL_SYS_WIN16 126static HWND topWnd=0; 127static FARPROC lpTopWndProc=NULL; 128static FARPROC lpTopHookProc=NULL; 129extern HINSTANCE _hInstance; /* nice global CRT provides */ 130 131static 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 148static 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 158static 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) 170static void sock_cleanup(void) 171 { 172 if (wsa_init_done) 173 { 174 wsa_init_done=0; 175 WSACleanup(); 176 } 177 } 178#endif 179 180static 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 237int 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 248static 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 288int 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 326static 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; 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@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 *sock=s; 370 ret=1; 371err: 372 if ((ret == 0) && (s != -1)) 373 { 374 SHUTDOWN(s); 375 } 376 return(ret); 377 } 378 379static int init_server(int *sock, int port, int type) 380 { 381 return(init_server_long(sock, port, NULL, type)); 382 } 383 384static int do_accept(int acc_sock, int *sock, char **host) 385 { 386 int ret; 387 struct hostent *h1,*h2; 388 static struct sockaddr_in from; 389 int len; 390/* struct linger ling; */ 391 392 if (!ssl_sock_init()) return(0); 393 394#ifndef OPENSSL_SYS_WINDOWS 395redoit: 396#endif 397 398 memset((char *)&from,0,sizeof(from)); 399 len=sizeof(from); 400 /* Note: under VMS with SOCKETSHR the fourth parameter is currently 401 * of type (int *) whereas under other systems it is (void *) if 402 * you don't have a cast it will choke the compiler: if you do 403 * have a cast then you can either go for (int *) or (void *). 404 */ 405 ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len); 406 if (ret == INVALID_SOCKET) 407 { 408#if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)) 409 int i; 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 if (h2->h_addrtype != AF_INET) 465 { 466 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n"); 467 return(0); 468 } 469 } 470end: 471 *sock=ret; 472 return(1); 473 } 474 475int extract_host_port(char *str, char **host_ptr, unsigned char *ip, 476 short *port_ptr) 477 { 478 char *h,*p; 479 480 h=str; 481 p=strchr(str,':'); 482 if (p == NULL) 483 { 484 BIO_printf(bio_err,"no port defined\n"); 485 return(0); 486 } 487 *(p++)='\0'; 488 489 if ((ip != NULL) && !host_ip(str,ip)) 490 goto err; 491 if (host_ptr != NULL) *host_ptr=h; 492 493 if (!extract_port(p,port_ptr)) 494 goto err; 495 return(1); 496err: 497 return(0); 498 } 499 500static int host_ip(char *str, unsigned char ip[4]) 501 { 502 unsigned int in[4]; 503 int i; 504 505 if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4) 506 { 507 for (i=0; i<4; i++) 508 if (in[i] > 255) 509 { 510 BIO_printf(bio_err,"invalid IP address\n"); 511 goto err; 512 } 513 ip[0]=in[0]; 514 ip[1]=in[1]; 515 ip[2]=in[2]; 516 ip[3]=in[3]; 517 } 518 else 519 { /* do a gethostbyname */ 520 struct hostent *he; 521 522 if (!ssl_sock_init()) return(0); 523 524 he=GetHostByName(str); 525 if (he == NULL) 526 { 527 BIO_printf(bio_err,"gethostbyname failure\n"); 528 goto err; 529 } 530 /* cast to short because of win16 winsock definition */ 531 if ((short)he->h_addrtype != AF_INET) 532 { 533 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n"); 534 return(0); 535 } 536 ip[0]=he->h_addr_list[0][0]; 537 ip[1]=he->h_addr_list[0][1]; 538 ip[2]=he->h_addr_list[0][2]; 539 ip[3]=he->h_addr_list[0][3]; 540 } 541 return(1); 542err: 543 return(0); 544 } 545 546int extract_port(char *str, short *port_ptr) 547 { 548 int i; 549 struct servent *s; 550 551 i=atoi(str); 552 if (i != 0) 553 *port_ptr=(unsigned short)i; 554 else 555 { 556 s=getservbyname(str,"tcp"); 557 if (s == NULL) 558 { 559 BIO_printf(bio_err,"getservbyname failure for %s\n",str); 560 return(0); 561 } 562 *port_ptr=ntohs((unsigned short)s->s_port); 563 } 564 return(1); 565 } 566 567#define GHBN_NUM 4 568static struct ghbn_cache_st 569 { 570 char name[128]; 571 struct hostent ent; 572 unsigned long order; 573 } ghbn_cache[GHBN_NUM]; 574 575static unsigned long ghbn_hits=0L; 576static unsigned long ghbn_miss=0L; 577 578static struct hostent *GetHostByName(char *name) 579 { 580 struct hostent *ret; 581 int i,lowi=0; 582 unsigned long low= (unsigned long)-1; 583 584 for (i=0; i<GHBN_NUM; i++) 585 { 586 if (low > ghbn_cache[i].order) 587 { 588 low=ghbn_cache[i].order; 589 lowi=i; 590 } 591 if (ghbn_cache[i].order > 0) 592 { 593 if (strncmp(name,ghbn_cache[i].name,128) == 0) 594 break; 595 } 596 } 597 if (i == GHBN_NUM) /* no hit*/ 598 { 599 ghbn_miss++; 600 ret=gethostbyname(name); 601 if (ret == NULL) return(NULL); 602 /* else add to cache */ 603 if(strlen(name) < sizeof ghbn_cache[0].name) 604 { 605 strcpy(ghbn_cache[lowi].name,name); 606 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent)); 607 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits; 608 } 609 return(ret); 610 } 611 else 612 { 613 ghbn_hits++; 614 ret= &(ghbn_cache[i].ent); 615 ghbn_cache[i].order=ghbn_miss+ghbn_hits; 616 return(ret); 617 } 618 } 619 620#endif 621