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