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 defined SOL_SOCKET && defined SO_REUSEADDR
 346                 {
 347                 int j = 1;
 348                 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &j, sizeof j);
 349                 }
 350 #endif
 351         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
 352                 {
 353 #ifndef WINDOWS
 354                 perror("bind");
 355 #endif
 356                 goto err;
 357                 }
 358         /* Make it 128 for linux */
 359         if (listen(s,128) == -1) goto err;
 360         i=0;
 361         *sock=s;
 362         ret=1;
 363 err:
 364         if ((ret == 0) && (s != -1))
 365                 {
 366                 SHUTDOWN(s);
 367                 }
 368         return(ret);
 369         }
 370
 371 int init_server(sock,port)
 372 int *sock;
 373 int port;
 374         {
 375         return(init_server_long(sock, port, NULL));
 376         }
 377
 378 int do_accept(acc_sock, sock, host)
 379 int acc_sock;
 380 int *sock;
 381 char **host;
 382         {
 383         int ret,i;
 384         struct hostent *h1,*h2;
 385         static struct sockaddr_in from;
 386         int len;
 387 /*      struct linger ling; */
 388
 389         if (!sock_init()) return(0);
 390
 391 #ifndef WINDOWS
 392 redoit:
 393 #endif
 394
 395         memset((char *)&from,0,sizeof(from));
 396         len=sizeof(from);
 397         ret=accept(acc_sock,(struct sockaddr *)&from,&len);
 398         if (ret == INVALID_SOCKET)
 399                 {
 400 #ifdef WINDOWS
 401                 i=WSAGetLastError();
 402                 BIO_printf(bio_err,"accept error %d\n",i);
 403 #else
 404                 if (errno == EINTR)
 405                         {
 406                         /*check_timeout(); */
 407                         goto redoit;
 408                         }
 409                 fprintf(stderr,"errno=%d ",errno);
 410                 perror("accept");
 411 #endif
 412                 return(0);
 413                 }
 414
 415 /*
 416         ling.l_onoff=1;
 417         ling.l_linger=0;
 418         i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
 419         if (i < 0) { perror("linger"); return(0); }
 420         i=0;
 421         i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 422         if (i < 0) { perror("keepalive"); return(0); }
 423 */
 424
 425         if (host == NULL) goto end;
 426 #ifndef BIT_FIELD_LIMITS
 427         /* I should use WSAAsyncGetHostByName() under windows */
 428         h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
 429                 sizeof(from.sin_addr.s_addr),AF_INET);
 430 #else
 431         h1=gethostbyaddr((char *)&from.sin_addr,
 432                 sizeof(struct in_addr),AF_INET);
 433 #endif
 434         if (h1 == NULL)
 435                 {
 436                 BIO_printf(bio_err,"bad gethostbyaddr\n");
 437                 *host=NULL;
 438                 /* return(0); */
 439                 }
 440         else
 441                 {
 442                 if ((*host=(char *)Malloc(strlen(h1->h_name)+1)) == NULL)
 443                         {
 444                         perror("Malloc");
 445                         return(0);
 446                         }
 447                 strcpy(*host,h1->h_name);
 448
 449                 h2=GetHostByName(*host);
 450                 if (h2 == NULL)
 451                         {
 452                         BIO_printf(bio_err,"gethostbyname failure\n");
 453                         return(0);
 454                         }
 455                 i=0;
 456                 if (h2->h_addrtype != AF_INET)
 457                         {
 458                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 459                         return(0);
 460                         }
 461                 }
 462 end:
 463         *sock=ret;
 464         return(1);
 465         }
 466
 467 int extract_host_port(str,host_ptr,ip,port_ptr)
 468 char *str;
 469 char **host_ptr;
 470 unsigned char *ip;
 471 short *port_ptr;
 472         {
 473         char *h,*p;
 474
 475         h=str;
 476         p=strchr(str,':');
 477         if (p == NULL)
 478                 {
 479                 BIO_printf(bio_err,"no port defined\n");
 480                 return(0);
 481                 }
 482         *(p++)='\0';
 483
 484         if ((ip != NULL) && !host_ip(str,ip))
 485                 goto err;
 486         if (host_ptr != NULL) *host_ptr=h;
 487
 488         if (!extract_port(p,port_ptr))
 489                 goto err;
 490         return(1);
 491 err:
 492         return(0);
 493         }
 494
 495 int host_ip(str,ip)
 496 char *str;
 497 unsigned char ip[4];
 498         {
 499         unsigned int in[4];
 500         int i;
 501
 502         if (sscanf(str,"%d.%d.%d.%d",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
 503                 {
 504                 for (i=0; i<4; i++)
 505                         if (in[i] > 255)
 506                                 {
 507                                 BIO_printf(bio_err,"invalid IP address\n");
 508                                 goto err;
 509                                 }
 510                 ip[0]=in[0];
 511                 ip[1]=in[1];
 512                 ip[2]=in[2];
 513                 ip[3]=in[3];
 514                 }
 515         else
 516                 { /* do a gethostbyname */
 517                 struct hostent *he;
 518
 519                 if (!sock_init()) return(0);
 520
 521                 he=GetHostByName(str);
 522                 if (he == NULL)
 523                         {
 524                         BIO_printf(bio_err,"gethostbyname failure\n");
 525                         goto err;
 526                         }
 527                 /* cast to short because of win16 winsock definition */
 528                 if ((short)he->h_addrtype != AF_INET)
 529                         {
 530                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 531                         return(0);
 532                         }
 533                 ip[0]=he->h_addr_list[0][0];
 534                 ip[1]=he->h_addr_list[0][1];
 535                 ip[2]=he->h_addr_list[0][2];
 536                 ip[3]=he->h_addr_list[0][3];
 537                 }
 538         return(1);
 539 err:
 540         return(0);
 541         }
 542
 543 int extract_port(str,port_ptr)
 544 char *str;
 545 short *port_ptr;
 546         {
 547         int i;
 548         struct servent *s;
 549
 550         i=atoi(str);
 551         if (i != 0)
 552                 *port_ptr=(unsigned short)i;
 553         else
 554                 {
 555                 s=getservbyname(str,"tcp");
 556                 if (s == NULL)
 557                         {
 558                         BIO_printf(bio_err,"getservbyname failure for %s\n",str);
 559                         return(0);
 560                         }
 561                 *port_ptr=ntohs((unsigned short)s->s_port);
 562                 }
 563         return(1);
 564         }
 565
 566 #define GHBN_NUM        4
 567 static struct ghbn_cache_st
 568         {
 569         char name[128];
 570         struct hostent ent;
 571         unsigned long order;
 572         } ghbn_cache[GHBN_NUM];
 573
 574 static unsigned long ghbn_hits=0L;
 575 static unsigned long ghbn_miss=0L;
 576
 577 static struct hostent *GetHostByName(name)
 578 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                 strncpy(ghbn_cache[lowi].name,name,128);
 604                 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
 605                 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
 606                 return(ret);
 607                 }
 608         else
 609                 {
 610                 ghbn_hits++;
 611                 ret= &(ghbn_cache[i].ent);
 612                 ghbn_cache[i].order=ghbn_miss+ghbn_hits;
 613                 return(ret);
 614                 }
 615         }
 616
 617 #ifndef MSDOS
 618 int spawn(argc, argv, in, out)
 619 int argc;
 620 char **argv;
 621 int *in;
 622 int *out;
 623         {
 624         int pid;
 625 #define CHILD_READ      p1[0]
 626 #define CHILD_WRITE     p2[1]
 627 #define PARENT_READ     p2[0]
 628 #define PARENT_WRITE    p1[1]
 629         int p1[2],p2[2];
 630
 631         if ((pipe(p1) < 0) || (pipe(p2) < 0)) return(-1);
 632
 633         if ((pid=fork()) == 0)
 634                 { /* child */
 635                 if (dup2(CHILD_WRITE,fileno(stdout)) < 0)
 636                         perror("dup2");
 637                 if (dup2(CHILD_WRITE,fileno(stderr)) < 0)
 638                         perror("dup2");
 639                 if (dup2(CHILD_READ,fileno(stdin)) < 0)
 640                         perror("dup2");
 641                 close(CHILD_READ);
 642                 close(CHILD_WRITE);
 643
 644                 close(PARENT_READ);
 645                 close(PARENT_WRITE);
 646                 execvp(argv[0],argv);
 647                 perror("child");
 648                 exit(1);
 649                 }
 650
 651         /* parent */
 652         *in= PARENT_READ;
 653         *out=PARENT_WRITE;
 654         close(CHILD_READ);
 655         close(CHILD_WRITE);
 656         return(pid);
 657         }
 658 #endif /* MSDOS */
 659
 660
 661 #ifdef undef
 662         /* Turn on synchronous sockets so that we can do a WaitForMultipleObjects
 663          * on sockets */
 664         {
 665         SOCKET s;
 666         int optionValue = SO_SYNCHRONOUS_NONALERT;
 667         int err;
 668
 669         err = setsockopt(
 670             INVALID_SOCKET,
 671             SOL_SOCKET,
 672             SO_OPENTYPE,
 673             (char *)&optionValue,
 674             sizeof(optionValue));
 675         if (err != NO_ERROR) {
 676         /* failed for some reason... */
 677                 BIO_printf(bio_err, "failed to setsockopt(SO_OPENTYPE, SO_SYNCHRONOUS_ALERT) - %d\n",
 678                         WSAGetLastError());
 679                 }
 680         }
 681 #endif