apps/s_socket.c

   1 /* apps/s_socket.c */
   2 /* Copyright (C) 1995-1997 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                 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)
 284 int port;
 285 int *ret;
 286 int (*cb)();
 287         {
 288         int sock;
 289         char *name;
 290         int accept_socket;
 291         int i;
 292
 293         if (!init_server(&accept_socket,port)) return(0);
 294
 295         if (ret != NULL)
 296                 {
 297                 *ret=accept_socket;
 298                 /* return(1);*/
 299                 }
 300         for (;;)
 301                 {
 302                 if (do_accept(accept_socket,&sock,&name) == 0)
 303                         {
 304                         SHUTDOWN(accept_socket);
 305                         return(0);
 306                         }
 307                 i=(*cb)(name,sock);
 308                 if (name != NULL) Free(name);
 309                 SHUTDOWN(sock);
 310                 if (i < 0)
 311                         {
 312                         SHUTDOWN(accept_socket);
 313                         return(i);
 314                         }
 315                 }
 316         }
 317
 318 int init_server(sock, port)
 319 int *sock;
 320 int port;
 321         {
 322         int ret=0;
 323         struct sockaddr_in server;
 324         int s= -1,i;
 325
 326         if (!sock_init()) return(0);
 327
 328         memset((char *)&server,0,sizeof(server));
 329         server.sin_family=AF_INET;
 330         server.sin_port=htons((unsigned short)port);
 331         server.sin_addr.s_addr=INADDR_ANY;
 332         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 333
 334         if (s == INVALID_SOCKET) goto err;
 335         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
 336                 {
 337 #ifndef WINDOWS
 338                 perror("bind");
 339 #endif
 340                 goto err;
 341                 }
 342         if (listen(s,5) == -1) goto err;
 343         i=0;
 344         *sock=s;
 345         ret=1;
 346 err:
 347         if ((ret == 0) && (s != -1))
 348                 {
 349                 SHUTDOWN(s);
 350                 }
 351         return(ret);
 352         }
 353
 354 int do_accept(acc_sock, sock, host)
 355 int acc_sock;
 356 int *sock;
 357 char **host;
 358         {
 359         int ret,i;
 360         struct hostent *h1,*h2;
 361         static struct sockaddr_in from;
 362         int len;
 363 /*      struct linger ling; */
 364
 365         if (!sock_init()) return(0);
 366
 367 #ifndef WINDOWS
 368 redoit:
 369 #endif
 370
 371         memset((char *)&from,0,sizeof(from));
 372         len=sizeof(from);
 373         ret=accept(acc_sock,(struct sockaddr *)&from,&len);
 374         if (ret == INVALID_SOCKET)
 375                 {
 376 #ifdef WINDOWS
 377                 i=WSAGetLastError();
 378                 BIO_printf(bio_err,"accept error %d\n",i);
 379 #else
 380                 if (errno == EINTR)
 381                         {
 382                         /*check_timeout(); */
 383                         goto redoit;
 384                         }
 385                 fprintf(stderr,"errno=%d ",errno);
 386                 perror("accept");
 387 #endif
 388                 return(0);
 389                 }
 390
 391 /*
 392         ling.l_onoff=1;
 393         ling.l_linger=0;
 394         i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
 395         if (i < 0) { perror("linger"); return(0); }
 396         i=0;
 397         i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 398         if (i < 0) { perror("keepalive"); return(0); }
 399 */
 400
 401         if (host == NULL) goto end;
 402         /* I should use WSAAsyncGetHostByName() under windows */
 403         h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
 404                 sizeof(from.sin_addr.s_addr),AF_INET);
 405         if (h1 == NULL)
 406                 {
 407                 BIO_printf(bio_err,"bad gethostbyaddr\n");
 408                 *host=NULL;
 409                 /* return(0); */
 410                 }
 411         else
 412                 {
 413                 if ((*host=(char *)Malloc(strlen(h1->h_name)+1)) == NULL)
 414                         {
 415                         perror("Malloc");
 416                         return(0);
 417                         }
 418                 strcpy(*host,h1->h_name);
 419
 420                 h2=GetHostByName(*host);
 421                 if (h2 == NULL)
 422                         {
 423                         BIO_printf(bio_err,"gethostbyname failure\n");
 424                         return(0);
 425                         }
 426                 i=0;
 427                 if (h2->h_addrtype != AF_INET)
 428                         {
 429                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 430                         return(0);
 431                         }
 432                 }
 433 end:
 434         *sock=ret;
 435         return(1);
 436         }
 437
 438 int socket_ioctl(fd,type,arg)
 439 int fd;
 440 long type;
 441 unsigned long *arg;
 442         {
 443         int i,err;
 444 #ifdef WINDOWS
 445         i=ioctlsocket(fd,type,arg);
 446 #else
 447         i=ioctl(fd,type,arg);
 448 #endif
 449         if (i < 0)
 450                 {
 451 #ifdef WINDOWS
 452                 err=WSAGetLastError();
 453 #else
 454                 err=errno;
 455 #endif
 456                 BIO_printf(bio_err,"ioctl on socket failed:error %d\n",err);
 457                 }
 458         return(i);
 459         }
 460
 461 int sock_err()
 462         {
 463 #ifdef WINDOWS
 464         return(WSAGetLastError());
 465 #else
 466         return(errno);
 467 #endif
 468         }
 469
 470 int extract_host_port(str,host_ptr,ip,port_ptr)
 471 char *str;
 472 char **host_ptr;
 473 unsigned char *ip;
 474 short *port_ptr;
 475         {
 476         char *h,*p;
 477
 478         h=str;
 479         p=strchr(str,':');
 480         if (p == NULL)
 481                 {
 482                 BIO_printf(bio_err,"no port defined\n");
 483                 return(0);
 484                 }
 485         *(p++)='\0';
 486
 487         if ((ip != NULL) && !host_ip(str,ip))
 488                 goto err;
 489         if (host_ptr != NULL) *host_ptr=h;
 490
 491         if (!extract_port(p,port_ptr))
 492                 goto err;
 493         return(1);
 494 err:
 495         return(0);
 496         }
 497
 498 int host_ip(str,ip)
 499 char *str;
 500 unsigned char ip[4];
 501         {
 502         unsigned int in[4];
 503         int i;
 504
 505         if (sscanf(str,"%d.%d.%d.%d",&(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 (!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);
 542 err:
 543         return(0);
 544         }
 545
 546 int extract_port(str,port_ptr)
 547 char *str;
 548 short *port_ptr;
 549         {
 550         int i;
 551         struct servent *s;
 552
 553         i=atoi(str);
 554         if (i != 0)
 555                 *port_ptr=(unsigned short)i;
 556         else
 557                 {
 558                 s=getservbyname(str,"tcp");
 559                 if (s == NULL)
 560                         {
 561                         BIO_printf(bio_err,"getservbyname failure for %s\n",str);
 562                         return(0);
 563                         }
 564                 *port_ptr=ntohs((unsigned short)s->s_port);
 565                 }
 566         return(1);
 567         }
 568
 569 #define GHBN_NUM        4
 570 static struct ghbn_cache_st
 571         {
 572         char name[128];
 573         struct hostent ent;
 574         unsigned long order;
 575         } ghbn_cache[GHBN_NUM];
 576
 577 static unsigned long ghbn_hits=0L;
 578 static unsigned long ghbn_miss=0L;
 579
 580 static struct hostent *GetHostByName(name)
 581 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                 strncpy(ghbn_cache[lowi].name,name,128);
 607                 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
 608                 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
 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 #ifndef MSDOS
 621 int spawn(argc, argv, in, out)
 622 int argc;
 623 char **argv;
 624 int *in;
 625 int *out;
 626         {
 627         int pid;
 628 #define CHILD_READ      p1[0]
 629 #define CHILD_WRITE     p2[1]
 630 #define PARENT_READ     p2[0]
 631 #define PARENT_WRITE    p1[1]
 632         int p1[2],p2[2];
 633
 634         if ((pipe(p1) < 0) || (pipe(p2) < 0)) return(-1);
 635
 636         if ((pid=fork()) == 0)
 637                 { /* child */
 638                 if (dup2(CHILD_WRITE,fileno(stdout)) < 0)
 639                         perror("dup2");
 640                 if (dup2(CHILD_WRITE,fileno(stderr)) < 0)
 641                         perror("dup2");
 642                 if (dup2(CHILD_READ,fileno(stdin)) < 0)
 643                         perror("dup2");
 644                 close(CHILD_READ);
 645                 close(CHILD_WRITE);
 646
 647                 close(PARENT_READ);
 648                 close(PARENT_WRITE);
 649                 execvp(argv[0],argv);
 650                 perror("child");
 651                 exit(1);
 652                 }
 653
 654         /* parent */
 655         *in= PARENT_READ;
 656         *out=PARENT_WRITE;
 657         close(CHILD_READ);
 658         close(CHILD_WRITE);
 659         return(pid);
 660         }
 661 #endif /* MSDOS */
 662
 663
 664 #ifdef undef
 665         /* Turn on synchronous sockets so that we can do a WaitForMultipleObjects
 666          * on sockets */
 667         {
 668         SOCKET s;
 669         int optionValue = SO_SYNCHRONOUS_NONALERT;
 670         int err;
 671
 672         err = setsockopt(
 673             INVALID_SOCKET,
 674             SOL_SOCKET,
 675             SO_OPENTYPE,
 676             (char *)&optionValue,
 677             sizeof(optionValue));
 678         if (err != NO_ERROR) {
 679         /* failed for some reason... */
 680                 BIO_printf(bio_err, "failed to setsockopt(SO_OPENTYPE, SO_SYNCHRONOUS_ALERT) - %d\n",
 681                         WSAGetLastError());
 682                 }
 683         }
 684 #endif