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)
 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                 SHUTDOWN2(sock);
 310                 if (i < 0)
 311                         {
 312                         SHUTDOWN2(accept_socket);
 313                         return(i);
 314                         }
 315                 }
 316         }
 317
 318 int init_server_long(sock, port, ip)
 319 int *sock;
 320 int port;
 321 char *ip;
 322         {
 323         int ret=0;
 324         struct sockaddr_in server;
 325         int s= -1,i;
 326
 327         if (!sock_init()) return(0);
 328
 329         memset((char *)&server,0,sizeof(server));
 330         server.sin_family=AF_INET;
 331         server.sin_port=htons((unsigned short)port);
 332         if (ip == NULL)
 333                 server.sin_addr.s_addr=INADDR_ANY;
 334         else
 335                 memcpy(&server.sin_addr.s_addr,ip,4);
 336         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 337
 338         if (s == INVALID_SOCKET) goto err;
 339         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
 340                 {
 341 #ifndef WINDOWS
 342                 perror("bind");
 343 #endif
 344                 goto err;
 345                 }
 346         /* Make it 128 for linux */
 347         if (listen(s,128) == -1) goto err;
 348         i=0;
 349         *sock=s;
 350         ret=1;
 351 err:
 352         if ((ret == 0) && (s != -1))
 353                 {
 354                 SHUTDOWN(s);
 355                 }
 356         return(ret);
 357         }
 358
 359 int init_server(sock,port)
 360 int *sock;
 361 int port;
 362         {
 363         return(init_server_long(sock, port, NULL));
 364         }
 365
 366 int do_accept(acc_sock, sock, host)
 367 int acc_sock;
 368 int *sock;
 369 char **host;
 370         {
 371         int ret,i;
 372         struct hostent *h1,*h2;
 373         static struct sockaddr_in from;
 374         int len;
 375 /*      struct linger ling; */
 376
 377         if (!sock_init()) return(0);
 378
 379 #ifndef WINDOWS
 380 redoit:
 381 #endif
 382
 383         memset((char *)&from,0,sizeof(from));
 384         len=sizeof(from);
 385         ret=accept(acc_sock,(struct sockaddr *)&from,&len);
 386         if (ret == INVALID_SOCKET)
 387                 {
 388 #ifdef WINDOWS
 389                 i=WSAGetLastError();
 390                 BIO_printf(bio_err,"accept error %d\n",i);
 391 #else
 392                 if (errno == EINTR)
 393                         {
 394                         /*check_timeout(); */
 395                         goto redoit;
 396                         }
 397                 fprintf(stderr,"errno=%d ",errno);
 398                 perror("accept");
 399 #endif
 400                 return(0);
 401                 }
 402
 403 /*
 404         ling.l_onoff=1;
 405         ling.l_linger=0;
 406         i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
 407         if (i < 0) { perror("linger"); return(0); }
 408         i=0;
 409         i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 410         if (i < 0) { perror("keepalive"); return(0); }
 411 */
 412
 413         if (host == NULL) goto end;
 414 #ifndef BIT_FIELD_LIMITS
 415         /* I should use WSAAsyncGetHostByName() under windows */
 416         h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
 417                 sizeof(from.sin_addr.s_addr),AF_INET);
 418 #else
 419         h1=gethostbyaddr((char *)&from.sin_addr,
 420                 sizeof(struct in_addr),AF_INET);
 421 #endif
 422         if (h1 == NULL)
 423                 {
 424                 BIO_printf(bio_err,"bad gethostbyaddr\n");
 425                 *host=NULL;
 426                 /* return(0); */
 427                 }
 428         else
 429                 {
 430                 if ((*host=(char *)Malloc(strlen(h1->h_name)+1)) == NULL)
 431                         {
 432                         perror("Malloc");
 433                         return(0);
 434                         }
 435                 strcpy(*host,h1->h_name);
 436
 437                 h2=GetHostByName(*host);
 438                 if (h2 == NULL)
 439                         {
 440                         BIO_printf(bio_err,"gethostbyname failure\n");
 441                         return(0);
 442                         }
 443                 i=0;
 444                 if (h2->h_addrtype != AF_INET)
 445                         {
 446                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 447                         return(0);
 448                         }
 449                 }
 450 end:
 451         *sock=ret;
 452         return(1);
 453         }
 454
 455 int extract_host_port(str,host_ptr,ip,port_ptr)
 456 char *str;
 457 char **host_ptr;
 458 unsigned char *ip;
 459 short *port_ptr;
 460         {
 461         char *h,*p;
 462
 463         h=str;
 464         p=strchr(str,':');
 465         if (p == NULL)
 466                 {
 467                 BIO_printf(bio_err,"no port defined\n");
 468                 return(0);
 469                 }
 470         *(p++)='\0';
 471
 472         if ((ip != NULL) && !host_ip(str,ip))
 473                 goto err;
 474         if (host_ptr != NULL) *host_ptr=h;
 475
 476         if (!extract_port(p,port_ptr))
 477                 goto err;
 478         return(1);
 479 err:
 480         return(0);
 481         }
 482
 483 int host_ip(str,ip)
 484 char *str;
 485 unsigned char ip[4];
 486         {
 487         unsigned int in[4];
 488         int i;
 489
 490         if (sscanf(str,"%d.%d.%d.%d",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
 491                 {
 492                 for (i=0; i<4; i++)
 493                         if (in[i] > 255)
 494                                 {
 495                                 BIO_printf(bio_err,"invalid IP address\n");
 496                                 goto err;
 497                                 }
 498                 ip[0]=in[0];
 499                 ip[1]=in[1];
 500                 ip[2]=in[2];
 501                 ip[3]=in[3];
 502                 }
 503         else
 504                 { /* do a gethostbyname */
 505                 struct hostent *he;
 506
 507                 if (!sock_init()) return(0);
 508
 509                 he=GetHostByName(str);
 510                 if (he == NULL)
 511                         {
 512                         BIO_printf(bio_err,"gethostbyname failure\n");
 513                         goto err;
 514                         }
 515                 /* cast to short because of win16 winsock definition */
 516                 if ((short)he->h_addrtype != AF_INET)
 517                         {
 518                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 519                         return(0);
 520                         }
 521                 ip[0]=he->h_addr_list[0][0];
 522                 ip[1]=he->h_addr_list[0][1];
 523                 ip[2]=he->h_addr_list[0][2];
 524                 ip[3]=he->h_addr_list[0][3];
 525                 }
 526         return(1);
 527 err:
 528         return(0);
 529         }
 530
 531 int extract_port(str,port_ptr)
 532 char *str;
 533 short *port_ptr;
 534         {
 535         int i;
 536         struct servent *s;
 537
 538         i=atoi(str);
 539         if (i != 0)
 540                 *port_ptr=(unsigned short)i;
 541         else
 542                 {
 543                 s=getservbyname(str,"tcp");
 544                 if (s == NULL)
 545                         {
 546                         BIO_printf(bio_err,"getservbyname failure for %s\n",str);
 547                         return(0);
 548                         }
 549                 *port_ptr=ntohs((unsigned short)s->s_port);
 550                 }
 551         return(1);
 552         }
 553
 554 #define GHBN_NUM        4
 555 static struct ghbn_cache_st
 556         {
 557         char name[128];
 558         struct hostent ent;
 559         unsigned long order;
 560         } ghbn_cache[GHBN_NUM];
 561
 562 static unsigned long ghbn_hits=0L;
 563 static unsigned long ghbn_miss=0L;
 564
 565 static struct hostent *GetHostByName(name)
 566 char *name;
 567         {
 568         struct hostent *ret;
 569         int i,lowi=0;
 570         unsigned long low= (unsigned long)-1;
 571
 572         for (i=0; i<GHBN_NUM; i++)
 573                 {
 574                 if (low > ghbn_cache[i].order)
 575                         {
 576                         low=ghbn_cache[i].order;
 577                         lowi=i;
 578                         }
 579                 if (ghbn_cache[i].order > 0)
 580                         {
 581                         if (strncmp(name,ghbn_cache[i].name,128) == 0)
 582                                 break;
 583                         }
 584                 }
 585         if (i == GHBN_NUM) /* no hit*/
 586                 {
 587                 ghbn_miss++;
 588                 ret=gethostbyname(name);
 589                 if (ret == NULL) return(NULL);
 590                 /* else add to cache */
 591                 strncpy(ghbn_cache[lowi].name,name,128);
 592                 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
 593                 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
 594                 return(ret);
 595                 }
 596         else
 597                 {
 598                 ghbn_hits++;
 599                 ret= &(ghbn_cache[i].ent);
 600                 ghbn_cache[i].order=ghbn_miss+ghbn_hits;
 601                 return(ret);
 602                 }
 603         }
 604
 605 #ifndef MSDOS
 606 int spawn(argc, argv, in, out)
 607 int argc;
 608 char **argv;
 609 int *in;
 610 int *out;
 611         {
 612         int pid;
 613 #define CHILD_READ      p1[0]
 614 #define CHILD_WRITE     p2[1]
 615 #define PARENT_READ     p2[0]
 616 #define PARENT_WRITE    p1[1]
 617         int p1[2],p2[2];
 618
 619         if ((pipe(p1) < 0) || (pipe(p2) < 0)) return(-1);
 620
 621         if ((pid=fork()) == 0)
 622                 { /* child */
 623                 if (dup2(CHILD_WRITE,fileno(stdout)) < 0)
 624                         perror("dup2");
 625                 if (dup2(CHILD_WRITE,fileno(stderr)) < 0)
 626                         perror("dup2");
 627                 if (dup2(CHILD_READ,fileno(stdin)) < 0)
 628                         perror("dup2");
 629                 close(CHILD_READ);
 630                 close(CHILD_WRITE);
 631
 632                 close(PARENT_READ);
 633                 close(PARENT_WRITE);
 634                 execvp(argv[0],argv);
 635                 perror("child");
 636                 exit(1);
 637                 }
 638
 639         /* parent */
 640         *in= PARENT_READ;
 641         *out=PARENT_WRITE;
 642         close(CHILD_READ);
 643         close(CHILD_WRITE);
 644         return(pid);
 645         }
 646 #endif /* MSDOS */
 647
 648
 649 #ifdef undef
 650         /* Turn on synchronous sockets so that we can do a WaitForMultipleObjects
 651          * on sockets */
 652         {
 653         SOCKET s;
 654         int optionValue = SO_SYNCHRONOUS_NONALERT;
 655         int err;
 656
 657         err = setsockopt(
 658             INVALID_SOCKET,
 659             SOL_SOCKET,
 660             SO_OPENTYPE,
 661             (char *)&optionValue,
 662             sizeof(optionValue));
 663         if (err != NO_ERROR) {
 664         /* failed for some reason... */
 665                 BIO_printf(bio_err, "failed to setsockopt(SO_OPENTYPE, SO_SYNCHRONOUS_ALERT) - %d\n",
 666                         WSAGetLastError());
 667                 }
 668         }
 669 #endif