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