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;
 212         unsigned int size;
 213
 214         size=sizeof(int);
 215         i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(char *)&j,&size);
 216         if (i < 0)
 217                 return(1);
 218         else
 219                 return(j);
 220         }
 221
 222 int nbio_init_client_ip(int *sock, unsigned char ip[4], int port)
 223         {
 224         unsigned long addr;
 225         struct sockaddr_in them;
 226         int s,i;
 227
 228         if (!sock_init()) return(0);
 229
 230         memset((char *)&them,0,sizeof(them));
 231         them.sin_family=AF_INET;
 232         them.sin_port=htons((unsigned short)port);
 233         addr=   (unsigned long)
 234                 ((unsigned long)ip[0]<<24L)|
 235                 ((unsigned long)ip[1]<<16L)|
 236                 ((unsigned long)ip[2]<< 8L)|
 237                 ((unsigned long)ip[3]);
 238         them.sin_addr.s_addr=htonl(addr);
 239
 240         if (*sock <= 0)
 241                 {
 242                 unsigned long l=1;
 243
 244                 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 245                 if (s == INVALID_SOCKET) { perror("socket"); return(0); }
 246
 247                 i=0;
 248                 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 249                 if (i < 0) { perror("keepalive"); return(0); }
 250                 *sock=s;
 251
 252 #ifdef FIONBIO
 253                 BIO_socket_ioctl(s,FIONBIO,&l);
 254 #endif
 255                 }
 256         else
 257                 s= *sock;
 258
 259         i=connect(s,(struct sockaddr *)&them,sizeof(them));
 260         if (i == INVALID_SOCKET)
 261                 {
 262                 if (BIO_sock_should_retry(i))
 263                         return(-1);
 264                 else
 265                         return(0);
 266                 }
 267         else
 268                 return(1);
 269         }
 270
 271 int do_server(int port, int *ret, int (*cb)(), char *context)
 272         {
 273         int sock;
 274         char *name;
 275         int accept_socket;
 276         int i;
 277
 278         if (!init_server(&accept_socket,port)) return(0);
 279
 280         if (ret != NULL)
 281                 {
 282                 *ret=accept_socket;
 283                 /* return(1);*/
 284                 }
 285         for (;;)
 286                 {
 287                 if (do_accept(accept_socket,&sock,&name) == 0)
 288                         {
 289                         SHUTDOWN(accept_socket);
 290                         return(0);
 291                         }
 292                 i=(*cb)(name,sock, context);
 293                 if (name != NULL) Free(name);
 294                 SHUTDOWN2(sock);
 295                 if (i < 0)
 296                         {
 297                         SHUTDOWN2(accept_socket);
 298                         return(i);
 299                         }
 300                 }
 301         }
 302
 303 int init_server_long(int *sock, int port, char *ip)
 304         {
 305         int ret=0;
 306         struct sockaddr_in server;
 307         int s= -1,i;
 308
 309         if (!sock_init()) return(0);
 310
 311         memset((char *)&server,0,sizeof(server));
 312         server.sin_family=AF_INET;
 313         server.sin_port=htons((unsigned short)port);
 314         if (ip == NULL)
 315                 server.sin_addr.s_addr=INADDR_ANY;
 316         else
 317 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
 318 #ifndef BIT_FIELD_LIMITS
 319                 memcpy(&server.sin_addr.s_addr,ip,4);
 320 #else
 321                 memcpy(&server.sin_addr,ip,4);
 322 #endif
 323         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 324
 325         if (s == INVALID_SOCKET) goto err;
 326 #if defined SOL_SOCKET && defined SO_REUSEADDR
 327                 {
 328                 int j = 1;
 329                 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
 330                            (const void *) &j, sizeof j);
 331                 }
 332 #endif
 333         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
 334                 {
 335 #ifndef WINDOWS
 336                 perror("bind");
 337 #endif
 338                 goto err;
 339                 }
 340         /* Make it 128 for linux */
 341         if (listen(s,128) == -1) goto err;
 342         i=0;
 343         *sock=s;
 344         ret=1;
 345 err:
 346         if ((ret == 0) && (s != -1))
 347                 {
 348                 SHUTDOWN(s);
 349                 }
 350         return(ret);
 351         }
 352
 353 int init_server(int *sock, int port)
 354         {
 355         return(init_server_long(sock, port, NULL));
 356         }
 357
 358 int do_accept(int acc_sock, int *sock, char **host)
 359         {
 360         int ret,i;
 361         struct hostent *h1,*h2;
 362         static struct sockaddr_in from;
 363         unsigned int len;
 364 /*      struct linger ling; */
 365
 366         if (!sock_init()) return(0);
 367
 368 #ifndef WINDOWS
 369 redoit:
 370 #endif
 371
 372         memset((char *)&from,0,sizeof(from));
 373         len=sizeof(from);
 374         ret=accept(acc_sock,(struct sockaddr *)&from,&len);
 375         if (ret == INVALID_SOCKET)
 376                 {
 377 #ifdef WINDOWS
 378                 i=WSAGetLastError();
 379                 BIO_printf(bio_err,"accept error %d\n",i);
 380 #else
 381                 if (errno == EINTR)
 382                         {
 383                         /*check_timeout(); */
 384                         goto redoit;
 385                         }
 386                 fprintf(stderr,"errno=%d ",errno);
 387                 perror("accept");
 388 #endif
 389                 return(0);
 390                 }
 391
 392 /*
 393         ling.l_onoff=1;
 394         ling.l_linger=0;
 395         i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
 396         if (i < 0) { perror("linger"); return(0); }
 397         i=0;
 398         i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 399         if (i < 0) { perror("keepalive"); return(0); }
 400 */
 401
 402         if (host == NULL) goto end;
 403 #ifndef BIT_FIELD_LIMITS
 404         /* I should use WSAAsyncGetHostByName() under windows */
 405         h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
 406                 sizeof(from.sin_addr.s_addr),AF_INET);
 407 #else
 408         h1=gethostbyaddr((char *)&from.sin_addr,
 409                 sizeof(struct in_addr),AF_INET);
 410 #endif
 411         if (h1 == NULL)
 412                 {
 413                 BIO_printf(bio_err,"bad gethostbyaddr\n");
 414                 *host=NULL;
 415                 /* return(0); */
 416                 }
 417         else
 418                 {
 419                 if ((*host=(char *)Malloc(strlen(h1->h_name)+1)) == NULL)
 420                         {
 421                         perror("Malloc");
 422                         return(0);
 423                         }
 424                 strcpy(*host,h1->h_name);
 425
 426                 h2=GetHostByName(*host);
 427                 if (h2 == NULL)
 428                         {
 429                         BIO_printf(bio_err,"gethostbyname failure\n");
 430                         return(0);
 431                         }
 432                 i=0;
 433                 if (h2->h_addrtype != AF_INET)
 434                         {
 435                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 436                         return(0);
 437                         }
 438                 }
 439 end:
 440         *sock=ret;
 441         return(1);
 442         }
 443
 444 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
 445              short *port_ptr)
 446         {
 447         char *h,*p;
 448
 449         h=str;
 450         p=strchr(str,':');
 451         if (p == NULL)
 452                 {
 453                 BIO_printf(bio_err,"no port defined\n");
 454                 return(0);
 455                 }
 456         *(p++)='\0';
 457
 458         if ((ip != NULL) && !host_ip(str,ip))
 459                 goto err;
 460         if (host_ptr != NULL) *host_ptr=h;
 461
 462         if (!extract_port(p,port_ptr))
 463                 goto err;
 464         return(1);
 465 err:
 466         return(0);
 467         }
 468
 469 int host_ip(char *str, unsigned char ip[4])
 470         {
 471         unsigned int in[4];
 472         int i;
 473
 474         if (sscanf(str,"%d.%d.%d.%d",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
 475                 {
 476                 for (i=0; i<4; i++)
 477                         if (in[i] > 255)
 478                                 {
 479                                 BIO_printf(bio_err,"invalid IP address\n");
 480                                 goto err;
 481                                 }
 482                 ip[0]=in[0];
 483                 ip[1]=in[1];
 484                 ip[2]=in[2];
 485                 ip[3]=in[3];
 486                 }
 487         else
 488                 { /* do a gethostbyname */
 489                 struct hostent *he;
 490
 491                 if (!sock_init()) return(0);
 492
 493                 he=GetHostByName(str);
 494                 if (he == NULL)
 495                         {
 496                         BIO_printf(bio_err,"gethostbyname failure\n");
 497                         goto err;
 498                         }
 499                 /* cast to short because of win16 winsock definition */
 500                 if ((short)he->h_addrtype != AF_INET)
 501                         {
 502                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 503                         return(0);
 504                         }
 505                 ip[0]=he->h_addr_list[0][0];
 506                 ip[1]=he->h_addr_list[0][1];
 507                 ip[2]=he->h_addr_list[0][2];
 508                 ip[3]=he->h_addr_list[0][3];
 509                 }
 510         return(1);
 511 err:
 512         return(0);
 513         }
 514
 515 int extract_port(char *str, short *port_ptr)
 516         {
 517         int i;
 518         struct servent *s;
 519
 520         i=atoi(str);
 521         if (i != 0)
 522                 *port_ptr=(unsigned short)i;
 523         else
 524                 {
 525                 s=getservbyname(str,"tcp");
 526                 if (s == NULL)
 527                         {
 528                         BIO_printf(bio_err,"getservbyname failure for %s\n",str);
 529                         return(0);
 530                         }
 531                 *port_ptr=ntohs((unsigned short)s->s_port);
 532                 }
 533         return(1);
 534         }
 535
 536 #define GHBN_NUM        4
 537 static struct ghbn_cache_st
 538         {
 539         char name[128];
 540         struct hostent ent;
 541         unsigned long order;
 542         } ghbn_cache[GHBN_NUM];
 543
 544 static unsigned long ghbn_hits=0L;
 545 static unsigned long ghbn_miss=0L;
 546
 547 static struct hostent *GetHostByName(char *name)
 548         {
 549         struct hostent *ret;
 550         int i,lowi=0;
 551         unsigned long low= (unsigned long)-1;
 552
 553         for (i=0; i<GHBN_NUM; i++)
 554                 {
 555                 if (low > ghbn_cache[i].order)
 556                         {
 557                         low=ghbn_cache[i].order;
 558                         lowi=i;
 559                         }
 560                 if (ghbn_cache[i].order > 0)
 561                         {
 562                         if (strncmp(name,ghbn_cache[i].name,128) == 0)
 563                                 break;
 564                         }
 565                 }
 566         if (i == GHBN_NUM) /* no hit*/
 567                 {
 568                 ghbn_miss++;
 569                 ret=gethostbyname(name);
 570                 if (ret == NULL) return(NULL);
 571                 /* else add to cache */
 572                 strncpy(ghbn_cache[lowi].name,name,128);
 573                 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
 574                 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
 575                 return(ret);
 576                 }
 577         else
 578                 {
 579                 ghbn_hits++;
 580                 ret= &(ghbn_cache[i].ent);
 581                 ghbn_cache[i].order=ghbn_miss+ghbn_hits;
 582                 return(ret);
 583                 }
 584         }
 585
 586 #ifndef MSDOS
 587 int spawn(int argc, char **argv, int *in, int *out)
 588         {
 589         int pid;
 590 #define CHILD_READ      p1[0]
 591 #define CHILD_WRITE     p2[1]
 592 #define PARENT_READ     p2[0]
 593 #define PARENT_WRITE    p1[1]
 594         int p1[2],p2[2];
 595
 596         if ((pipe(p1) < 0) || (pipe(p2) < 0)) return(-1);
 597
 598         if ((pid=fork()) == 0)
 599                 { /* child */
 600                 if (dup2(CHILD_WRITE,fileno(stdout)) < 0)
 601                         perror("dup2");
 602                 if (dup2(CHILD_WRITE,fileno(stderr)) < 0)
 603                         perror("dup2");
 604                 if (dup2(CHILD_READ,fileno(stdin)) < 0)
 605                         perror("dup2");
 606                 close(CHILD_READ);
 607                 close(CHILD_WRITE);
 608
 609                 close(PARENT_READ);
 610                 close(PARENT_WRITE);
 611                 execvp(argv[0],argv);
 612                 perror("child");
 613                 exit(1);
 614                 }
 615
 616         /* parent */
 617         *in= PARENT_READ;
 618         *out=PARENT_WRITE;
 619         close(CHILD_READ);
 620         close(CHILD_WRITE);
 621         return(pid);
 622         }
 623 #endif /* MSDOS */
 624
 625
 626 #ifdef undef
 627         /* Turn on synchronous sockets so that we can do a WaitForMultipleObjects
 628          * on sockets */
 629         {
 630         SOCKET s;
 631         int optionValue = SO_SYNCHRONOUS_NONALERT;
 632         int err;
 633
 634         err = setsockopt(
 635             INVALID_SOCKET,
 636             SOL_SOCKET,
 637             SO_OPENTYPE,
 638             (char *)&optionValue,
 639             sizeof(optionValue));
 640         if (err != NO_ERROR) {
 641         /* failed for some reason... */
 642                 BIO_printf(bio_err, "failed to setsockopt(SO_OPENTYPE, SO_SYNCHRONOUS_ALERT) - %d\n",
 643                         WSAGetLastError());
 644                 }
 645         }
 646 #endif