apps/s_socket.c

   1 /* apps/s_socket.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 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <string.h>
  62 #include <errno.h>
  63 #include <signal.h>
  64 #define USE_SOCKETS
  65 #define NON_MAIN
  66 #include "apps.h"
  67 #undef USE_SOCKETS
  68 #undef NON_MAIN
  69 #include "s_apps.h"
  70 #include "ssl.h"
  71
  72 #ifndef NOPROTO
  73 static struct hostent *GetHostByName(char *name);
  74 int sock_init(void );
  75 #else
  76 static struct hostent *GetHostByName();
  77 int sock_init();
  78 #endif
  79
  80 #ifdef WIN16
  81 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
  82 #else
  83 #define SOCKET_PROTOCOL IPPROTO_TCP
  84 #endif
  85
  86 #ifdef WINDOWS
  87 static struct WSAData wsa_state;
  88 static int wsa_init_done=0;
  89
  90 #ifdef WIN16
  91 static HWND topWnd=0;
  92 static FARPROC lpTopWndProc=NULL;
  93 static FARPROC lpTopHookProc=NULL;
  94 extern HINSTANCE _hInstance;  /* nice global CRT provides */
  95
  96 static LONG FAR PASCAL topHookProc(hwnd,message,wParam,lParam)
  97 HWND hwnd;
  98 UINT message;
  99 WPARAM wParam;
 100 LPARAM lParam;
 101         {
 102         if (hwnd == topWnd)
 103                 {
 104                 switch(message)
 105                         {
 106                 case WM_DESTROY:
 107                 case WM_CLOSE:
 108                         SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc);
 109                         sock_cleanup();
 110                         break;
 111                         }
 112                 }
 113         return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam);
 114         }
 115
 116 static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam)
 117         {
 118         topWnd=hwnd;
 119         return(FALSE);
 120         }
 121
 122 #endif /* WIN32 */
 123 #endif /* WINDOWS */
 124
 125 void sock_cleanup()
 126         {
 127 #ifdef WINDOWS
 128         if (wsa_init_done)
 129                 {
 130                 wsa_init_done=0;
 131                 WSACancelBlockingCall();
 132                 WSACleanup();
 133                 }
 134 #endif
 135         }
 136
 137 int sock_init()
 138         {
 139 #ifdef WINDOWS
 140         if (!wsa_init_done)
 141                 {
 142                 int err;
 143
 144 #ifdef SIGINT
 145                 signal(SIGINT,(void (*)(int))sock_cleanup);
 146 #endif
 147                 wsa_init_done=1;
 148                 memset(&wsa_state,0,sizeof(wsa_state));
 149                 if (WSAStartup(0x0101,&wsa_state)!=0)
 150                         {
 151                         err=WSAGetLastError();
 152                         BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
 153                         return(0);
 154                         }
 155
 156 #ifdef WIN16
 157                 EnumTaskWindows(GetCurrentTask(),enumproc,0L);
 158                 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
 159                 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
 160
 161                 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
 162 #endif /* WIN16 */
 163                 }
 164 #endif /* WINDOWS */
 165         return(1);
 166         }
 167
 168 int init_client(sock, host, port)
 169 int *sock;
 170 char *host;
 171 int port;
 172         {
 173         unsigned char ip[4];
 174         short p=0;
 175
 176         if (!host_ip(host,&(ip[0])))
 177                 {
 178                 return(0);
 179                 }
 180         if (p != 0) port=p;
 181         return(init_client_ip(sock,ip,port));
 182         }
 183
 184 int init_client_ip(sock, ip, port)
 185 int *sock;
 186 unsigned char ip[4];
 187 int port;
 188         {
 189         unsigned long addr;
 190         struct sockaddr_in them;
 191         int s,i;
 192
 193         if (!sock_init()) return(0);
 194
 195         memset((char *)&them,0,sizeof(them));
 196         them.sin_family=AF_INET;
 197         them.sin_port=htons((unsigned short)port);
 198         addr=(unsigned long)
 199                 ((unsigned long)ip[0]<<24L)|
 200                 ((unsigned long)ip[1]<<16L)|
 201                 ((unsigned long)ip[2]<< 8L)|
 202                 ((unsigned long)ip[3]);
 203         them.sin_addr.s_addr=htonl(addr);
 204
 205         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 206         if (s == INVALID_SOCKET) { perror("socket"); return(0); }
 207
 208         i=0;
 209         i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 210         if (i < 0) { perror("keepalive"); return(0); }
 211
 212         if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
 213                 { close(s); perror("connect"); return(0); }
 214         *sock=s;
 215         return(1);
 216         }
 217
 218 int nbio_sock_error(sock)
 219 int sock;
 220         {
 221         int j,i,size;
 222
 223         size=sizeof(int);
 224         i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(char *)&j,&size);
 225         if (i < 0)
 226                 return(1);
 227         else
 228                 return(j);
 229         }
 230
 231 int nbio_init_client_ip(sock, ip, port)
 232 int *sock;
 233 unsigned char ip[4];
 234 int port;
 235         {
 236         unsigned long addr;
 237         struct sockaddr_in them;
 238         int s,i;
 239
 240         if (!sock_init()) return(0);
 241
 242         memset((char *)&them,0,sizeof(them));
 243         them.sin_family=AF_INET;
 244         them.sin_port=htons((unsigned short)port);
 245         addr=   (unsigned long)
 246                 ((unsigned long)ip[0]<<24L)|
 247                 ((unsigned long)ip[1]<<16L)|
 248                 ((unsigned long)ip[2]<< 8L)|
 249                 ((unsigned long)ip[3]);
 250         them.sin_addr.s_addr=htonl(addr);
 251
 252         if (*sock <= 0)
 253                 {
 254                 unsigned long l=1;
 255
 256                 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 257                 if (s == INVALID_SOCKET) { perror("socket"); return(0); }
 258
 259                 i=0;
 260                 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 261                 if (i < 0) { perror("keepalive"); return(0); }
 262                 *sock=s;
 263
 264 #ifdef FIONBIO
 265                 BIO_socket_ioctl(s,FIONBIO,&l);
 266 #endif
 267                 }
 268         else
 269                 s= *sock;
 270
 271         i=connect(s,(struct sockaddr *)&them,sizeof(them));
 272         if (i == INVALID_SOCKET)
 273                 {
 274                 if (BIO_sock_should_retry(i))
 275                         return(-1);
 276                 else
 277                         return(0);
 278                 }
 279         else
 280                 return(1);
 281         }
 282
 283 int do_server(port, ret, cb, context)
 284 int port;
 285 int *ret;
 286 int (*cb)();
 287 char *context;
 288         {
 289         int sock;
 290         char *name;
 291         int accept_socket;
 292         int i;
 293
 294         if (!init_server(&accept_socket,port)) return(0);
 295
 296         if (ret != NULL)
 297                 {
 298                 *ret=accept_socket;
 299                 /* return(1);*/
 300                 }
 301         for (;;)
 302                 {
 303                 if (do_accept(accept_socket,&sock,&name) == 0)
 304                         {
 305                         SHUTDOWN(accept_socket);
 306                         return(0);
 307                         }
 308                 i=(*cb)(name,sock, context);
 309                 if (name != NULL) Free(name);
 310                 SHUTDOWN2(sock);
 311                 if (i < 0)
 312                         {
 313                         SHUTDOWN2(accept_socket);
 314                         return(i);
 315                         }
 316                 }
 317         }
 318
 319 int init_server_long(sock, port, ip)
 320 int *sock;
 321 int port;
 322 char *ip;
 323         {
 324         int ret=0;
 325         struct sockaddr_in server;
 326         int s= -1,i;
 327
 328         if (!sock_init()) return(0);
 329
 330         memset((char *)&server,0,sizeof(server));
 331         server.sin_family=AF_INET;
 332         server.sin_port=htons((unsigned short)port);
 333         if (ip == NULL)
 334                 server.sin_addr.s_addr=INADDR_ANY;
 335         else
 336 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
 337 #ifndef BIT_FIELD_LIMITS
 338                 memcpy(&server.sin_addr.s_addr,ip,4);
 339 #else
 340                 memcpy(&server.sin_addr,ip,4);
 341 #endif
 342         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 343
 344         if (s == INVALID_SOCKET) goto err;
 345         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
 346                 {
 347 #ifndef WINDOWS
 348                 perror("bind");
 349 #endif
 350                 goto err;
 351                 }
 352         /* Make it 128 for linux */
 353         if (listen(s,128) == -1) goto err;
 354         i=0;
 355         *sock=s;
 356         ret=1;
 357 err:
 358         if ((ret == 0) && (s != -1))
 359                 {
 360                 SHUTDOWN(s);
 361                 }
 362         return(ret);
 363         }
 364
 365 int init_server(sock,port)
 366 int *sock;
 367 int port;
 368         {
 369         return(init_server_long(sock, port, NULL));
 370         }
 371
 372 int do_accept(acc_sock, sock, host)
 373 int acc_sock;
 374 int *sock;
 375 char **host;
 376         {
 377         int ret,i;
 378         struct hostent *h1,*h2;
 379         static struct sockaddr_in from;
 380         int len;
 381 /*      struct linger ling; */
 382
 383         if (!sock_init()) return(0);
 384
 385 #ifndef WINDOWS
 386 redoit:
 387 #endif
 388
 389         memset((char *)&from,0,sizeof(from));
 390         len=sizeof(from);
 391         ret=accept(acc_sock,(struct sockaddr *)&from,&len);
 392         if (ret == INVALID_SOCKET)
 393                 {
 394 #ifdef WINDOWS
 395                 i=WSAGetLastError();
 396                 BIO_printf(bio_err,"accept error %d\n",i);
 397 #else
 398                 if (errno == EINTR)
 399                         {
 400                         /*check_timeout(); */
 401                         goto redoit;
 402                         }
 403                 fprintf(stderr,"errno=%d ",errno);
 404                 perror("accept");
 405 #endif
 406                 return(0);
 407                 }
 408
 409 /*
 410         ling.l_onoff=1;
 411         ling.l_linger=0;
 412         i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
 413         if (i < 0) { perror("linger"); return(0); }
 414         i=0;
 415         i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 416         if (i < 0) { perror("keepalive"); return(0); }
 417 */
 418
 419         if (host == NULL) goto end;
 420 #ifndef BIT_FIELD_LIMITS
 421         /* I should use WSAAsyncGetHostByName() under windows */
 422         h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
 423                 sizeof(from.sin_addr.s_addr),AF_INET);
 424 #else
 425         h1=gethostbyaddr((char *)&from.sin_addr,
 426                 sizeof(struct in_addr),AF_INET);
 427 #endif
 428         if (h1 == NULL)
 429                 {
 430                 BIO_printf(bio_err,"bad gethostbyaddr\n");
 431                 *host=NULL;
 432                 /* return(0); */
 433                 }
 434         else
 435                 {
 436                 if ((*host=(char *)Malloc(strlen(h1->h_name)+1)) == NULL)
 437                         {
 438                         perror("Malloc");
 439                         return(0);
 440                         }
 441                 strcpy(*host,h1->h_name);
 442
 443                 h2=GetHostByName(*host);
 444                 if (h2 == NULL)
 445                         {
 446                         BIO_printf(bio_err,"gethostbyname failure\n");
 447                         return(0);
 448                         }
 449                 i=0;
 450                 if (h2->h_addrtype != AF_INET)
 451                         {
 452                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 453                         return(0);
 454                         }
 455                 }
 456 end:
 457         *sock=ret;
 458         return(1);
 459         }
 460
 461 int extract_host_port(str,host_ptr,ip,port_ptr)
 462 char *str;
 463 char **host_ptr;
 464 unsigned char *ip;
 465 short *port_ptr;
 466         {
 467         char *h,*p;
 468
 469         h=str;
 470         p=strchr(str,':');
 471         if (p == NULL)
 472                 {
 473                 BIO_printf(bio_err,"no port defined\n");
 474                 return(0);
 475                 }
 476         *(p++)='\0';
 477
 478         if ((ip != NULL) && !host_ip(str,ip))
 479                 goto err;
 480         if (host_ptr != NULL) *host_ptr=h;
 481
 482         if (!extract_port(p,port_ptr))
 483                 goto err;
 484         return(1);
 485 err:
 486         return(0);
 487         }
 488
 489 int host_ip(str,ip)
 490 char *str;
 491 unsigned char ip[4];
 492         {
 493         unsigned int in[4];
 494         int i;
 495
 496         if (sscanf(str,"%d.%d.%d.%d",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
 497                 {
 498                 for (i=0; i<4; i++)
 499                         if (in[i] > 255)
 500                                 {
 501                                 BIO_printf(bio_err,"invalid IP address\n");
 502                                 goto err;
 503                                 }
 504                 ip[0]=in[0];
 505                 ip[1]=in[1];
 506                 ip[2]=in[2];
 507                 ip[3]=in[3];
 508                 }
 509         else
 510                 { /* do a gethostbyname */
 511                 struct hostent *he;
 512
 513                 if (!sock_init()) return(0);
 514
 515                 he=GetHostByName(str);
 516                 if (he == NULL)
 517                         {
 518                         BIO_printf(bio_err,"gethostbyname failure\n");
 519                         goto err;
 520                         }
 521                 /* cast to short because of win16 winsock definition */
 522                 if ((short)he->h_addrtype != AF_INET)
 523                         {
 524                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 525                         return(0);
 526                         }
 527                 ip[0]=he->h_addr_list[0][0];
 528                 ip[1]=he->h_addr_list[0][1];
 529                 ip[2]=he->h_addr_list[0][2];
 530                 ip[3]=he->h_addr_list[0][3];
 531                 }
 532         return(1);
 533 err:
 534         return(0);
 535         }
 536
 537 int extract_port(str,port_ptr)
 538 char *str;
 539 short *port_ptr;
 540         {
 541         int i;
 542         struct servent *s;
 543
 544         i=atoi(str);
 545         if (i != 0)
 546                 *port_ptr=(unsigned short)i;
 547         else
 548                 {
 549                 s=getservbyname(str,"tcp");
 550                 if (s == NULL)
 551                         {
 552                         BIO_printf(bio_err,"getservbyname failure for %s\n",str);
 553                         return(0);
 554                         }
 555                 *port_ptr=ntohs((unsigned short)s->s_port);
 556                 }
 557         return(1);
 558         }
 559
 560 #define GHBN_NUM        4
 561 static struct ghbn_cache_st
 562         {
 563         char name[128];
 564         struct hostent ent;
 565         unsigned long order;
 566         } ghbn_cache[GHBN_NUM];
 567
 568 static unsigned long ghbn_hits=0L;
 569 static unsigned long ghbn_miss=0L;
 570
 571 static struct hostent *GetHostByName(name)
 572 char *name;
 573         {
 574         struct hostent *ret;
 575         int i,lowi=0;
 576         unsigned long low= (unsigned long)-1;
 577
 578         for (i=0; i<GHBN_NUM; i++)
 579                 {
 580                 if (low > ghbn_cache[i].order)
 581                         {
 582                         low=ghbn_cache[i].order;
 583                         lowi=i;
 584                         }
 585                 if (ghbn_cache[i].order > 0)
 586                         {
 587                         if (strncmp(name,ghbn_cache[i].name,128) == 0)
 588                                 break;
 589                         }
 590                 }
 591         if (i == GHBN_NUM) /* no hit*/
 592                 {
 593                 ghbn_miss++;
 594                 ret=gethostbyname(name);
 595                 if (ret == NULL) return(NULL);
 596                 /* else add to cache */
 597                 strncpy(ghbn_cache[lowi].name,name,128);
 598                 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
 599                 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
 600                 return(ret);
 601                 }
 602         else
 603                 {
 604                 ghbn_hits++;
 605                 ret= &(ghbn_cache[i].ent);
 606                 ghbn_cache[i].order=ghbn_miss+ghbn_hits;
 607                 return(ret);
 608                 }
 609         }
 610
 611 #ifndef MSDOS
 612 int spawn(argc, argv, in, out)
 613 int argc;
 614 char **argv;
 615 int *in;
 616 int *out;
 617         {
 618         int pid;
 619 #define CHILD_READ      p1[0]
 620 #define CHILD_WRITE     p2[1]
 621 #define PARENT_READ     p2[0]
 622 #define PARENT_WRITE    p1[1]
 623         int p1[2],p2[2];
 624
 625         if ((pipe(p1) < 0) || (pipe(p2) < 0)) return(-1);
 626
 627         if ((pid=fork()) == 0)
 628                 { /* child */
 629                 if (dup2(CHILD_WRITE,fileno(stdout)) < 0)
 630                         perror("dup2");
 631                 if (dup2(CHILD_WRITE,fileno(stderr)) < 0)
 632                         perror("dup2");
 633                 if (dup2(CHILD_READ,fileno(stdin)) < 0)
 634                         perror("dup2");
 635                 close(CHILD_READ);
 636                 close(CHILD_WRITE);
 637
 638                 close(PARENT_READ);
 639                 close(PARENT_WRITE);
 640                 execvp(argv[0],argv);
 641                 perror("child");
 642                 exit(1);
 643                 }
 644
 645         /* parent */
 646         *in= PARENT_READ;
 647         *out=PARENT_WRITE;
 648         close(CHILD_READ);
 649         close(CHILD_WRITE);
 650         return(pid);
 651         }
 652 #endif /* MSDOS */
 653
 654
 655 #ifdef undef
 656         /* Turn on synchronous sockets so that we can do a WaitForMultipleObjects
 657          * on sockets */
 658         {
 659         SOCKET s;
 660         int optionValue = SO_SYNCHRONOUS_NONALERT;
 661         int err;
 662
 663         err = setsockopt(
 664             INVALID_SOCKET,
 665             SOL_SOCKET,
 666             SO_OPENTYPE,
 667             (char *)&optionValue,
 668             sizeof(optionValue));
 669         if (err != NO_ERROR) {
 670         /* failed for some reason... */
 671                 BIO_printf(bio_err, "failed to setsockopt(SO_OPENTYPE, SO_SYNCHRONOUS_ALERT) - %d\n",
 672                         WSAGetLastError());
 673                 }
 674         }
 675 #endif