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 <openssl/ssl.h>
  71
  72 static struct hostent *GetHostByName(char *name);
  73 int sock_init(void );
  74 #ifdef WIN16
  75 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
  76 #else
  77 #define SOCKET_PROTOCOL IPPROTO_TCP
  78 #endif
  79
  80 #ifdef WINDOWS
  81 static struct WSAData wsa_state;
  82 static int wsa_init_done=0;
  83
  84 #ifdef WIN16
  85 static HWND topWnd=0;
  86 static FARPROC lpTopWndProc=NULL;
  87 static FARPROC lpTopHookProc=NULL;
  88 extern HINSTANCE _hInstance;  /* nice global CRT provides */
  89
  90 static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam,
  91              LPARAM lParam)
  92         {
  93         if (hwnd == topWnd)
  94                 {
  95                 switch(message)
  96                         {
  97                 case WM_DESTROY:
  98                 case WM_CLOSE:
  99                         SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc);
 100                         sock_cleanup();
 101                         break;
 102                         }
 103                 }
 104         return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam);
 105         }
 106
 107 static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam)
 108         {
 109         topWnd=hwnd;
 110         return(FALSE);
 111         }
 112
 113 #endif /* WIN32 */
 114 #endif /* WINDOWS */
 115
 116 void sock_cleanup(void)
 117         {
 118 #ifdef WINDOWS
 119         if (wsa_init_done)
 120                 {
 121                 wsa_init_done=0;
 122                 WSACancelBlockingCall();
 123                 WSACleanup();
 124                 }
 125 #endif
 126         }
 127
 128 int sock_init(void)
 129         {
 130 #ifdef WINDOWS
 131         if (!wsa_init_done)
 132                 {
 133                 int err;
 134
 135 #ifdef SIGINT
 136                 signal(SIGINT,(void (*)(int))sock_cleanup);
 137 #endif
 138                 wsa_init_done=1;
 139                 memset(&wsa_state,0,sizeof(wsa_state));
 140                 if (WSAStartup(0x0101,&wsa_state)!=0)
 141                         {
 142                         err=WSAGetLastError();
 143                         BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
 144                         return(0);
 145                         }
 146
 147 #ifdef WIN16
 148                 EnumTaskWindows(GetCurrentTask(),enumproc,0L);
 149                 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
 150                 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
 151
 152                 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
 153 #endif /* WIN16 */
 154                 }
 155 #endif /* WINDOWS */
 156         return(1);
 157         }
 158
 159 int init_client(int *sock, char *host, int port)
 160         {
 161         unsigned char ip[4];
 162         short p=0;
 163
 164         if (!host_ip(host,&(ip[0])))
 165                 {
 166                 return(0);
 167                 }
 168         if (p != 0) port=p;
 169         return(init_client_ip(sock,ip,port));
 170         }
 171
 172 int init_client_ip(int *sock, unsigned char ip[4], int port)
 173         {
 174         unsigned long addr;
 175         struct sockaddr_in them;
 176         int s,i;
 177
 178         if (!sock_init()) return(0);
 179
 180         memset((char *)&them,0,sizeof(them));
 181         them.sin_family=AF_INET;
 182         them.sin_port=htons((unsigned short)port);
 183         addr=(unsigned long)
 184                 ((unsigned long)ip[0]<<24L)|
 185                 ((unsigned long)ip[1]<<16L)|
 186                 ((unsigned long)ip[2]<< 8L)|
 187                 ((unsigned long)ip[3]);
 188         them.sin_addr.s_addr=htonl(addr);
 189
 190         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 191         if (s == INVALID_SOCKET) { perror("socket"); return(0); }
 192
 193         i=0;
 194         i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 195         if (i < 0) { perror("keepalive"); return(0); }
 196
 197         if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
 198                 { close(s); perror("connect"); return(0); }
 199         *sock=s;
 200         return(1);
 201         }
 202
 203 int nbio_sock_error(int sock)
 204         {
 205         int j,i;
 206         int size;
 207
 208         size=sizeof(int);
 209         i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(char *)&j,&size);
 210         if (i < 0)
 211                 return(1);
 212         else
 213                 return(j);
 214         }
 215
 216 int nbio_init_client_ip(int *sock, unsigned char ip[4], int port)
 217         {
 218         unsigned long addr;
 219         struct sockaddr_in them;
 220         int s,i;
 221
 222         if (!sock_init()) return(0);
 223
 224         memset((char *)&them,0,sizeof(them));
 225         them.sin_family=AF_INET;
 226         them.sin_port=htons((unsigned short)port);
 227         addr=   (unsigned long)
 228                 ((unsigned long)ip[0]<<24L)|
 229                 ((unsigned long)ip[1]<<16L)|
 230                 ((unsigned long)ip[2]<< 8L)|
 231                 ((unsigned long)ip[3]);
 232         them.sin_addr.s_addr=htonl(addr);
 233
 234         if (*sock <= 0)
 235                 {
 236                 unsigned long l=1;
 237
 238                 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 239                 if (s == INVALID_SOCKET) { perror("socket"); return(0); }
 240
 241                 i=0;
 242                 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 243                 if (i < 0) { perror("keepalive"); return(0); }
 244                 *sock=s;
 245
 246 #ifdef FIONBIO
 247                 BIO_socket_ioctl(s,FIONBIO,&l);
 248 #endif
 249                 }
 250         else
 251                 s= *sock;
 252
 253         i=connect(s,(struct sockaddr *)&them,sizeof(them));
 254         if (i == INVALID_SOCKET)
 255                 {
 256                 if (BIO_sock_should_retry(i))
 257                         return(-1);
 258                 else
 259                         return(0);
 260                 }
 261         else
 262                 return(1);
 263         }
 264
 265 int do_server(int port, int *ret, int (*cb)(), char *context)
 266         {
 267         int sock;
 268         char *name;
 269         int accept_socket;
 270         int i;
 271
 272         if (!init_server(&accept_socket,port)) return(0);
 273
 274         if (ret != NULL)
 275                 {
 276                 *ret=accept_socket;
 277                 /* return(1);*/
 278                 }
 279         for (;;)
 280                 {
 281                 if (do_accept(accept_socket,&sock,&name) == 0)
 282                         {
 283                         SHUTDOWN(accept_socket);
 284                         return(0);
 285                         }
 286                 i=(*cb)(name,sock, context);
 287                 if (name != NULL) Free(name);
 288                 SHUTDOWN2(sock);
 289                 if (i < 0)
 290                         {
 291                         SHUTDOWN2(accept_socket);
 292                         return(i);
 293                         }
 294                 }
 295         }
 296
 297 int init_server_long(int *sock, int port, char *ip)
 298         {
 299         int ret=0;
 300         struct sockaddr_in server;
 301         int s= -1,i;
 302
 303         if (!sock_init()) return(0);
 304
 305         memset((char *)&server,0,sizeof(server));
 306         server.sin_family=AF_INET;
 307         server.sin_port=htons((unsigned short)port);
 308         if (ip == NULL)
 309                 server.sin_addr.s_addr=INADDR_ANY;
 310         else
 311 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
 312 #ifndef BIT_FIELD_LIMITS
 313                 memcpy(&server.sin_addr.s_addr,ip,4);
 314 #else
 315                 memcpy(&server.sin_addr,ip,4);
 316 #endif
 317         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 318
 319         if (s == INVALID_SOCKET) goto err;
 320 #if defined SOL_SOCKET && defined SO_REUSEADDR
 321                 {
 322                 int j = 1;
 323                 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
 324                            (const void *) &j, sizeof j);
 325                 }
 326 #endif
 327         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
 328                 {
 329 #ifndef WINDOWS
 330                 perror("bind");
 331 #endif
 332                 goto err;
 333                 }
 334         /* Make it 128 for linux */
 335         if (listen(s,128) == -1) goto err;
 336         i=0;
 337         *sock=s;
 338         ret=1;
 339 err:
 340         if ((ret == 0) && (s != -1))
 341                 {
 342                 SHUTDOWN(s);
 343                 }
 344         return(ret);
 345         }
 346
 347 int init_server(int *sock, int port)
 348         {
 349         return(init_server_long(sock, port, NULL));
 350         }
 351
 352 int do_accept(int acc_sock, int *sock, char **host)
 353         {
 354         int ret,i;
 355         struct hostent *h1,*h2;
 356         static struct sockaddr_in from;
 357         int len;
 358 /*      struct linger ling; */
 359
 360         if (!sock_init()) return(0);
 361
 362 #ifndef WINDOWS
 363 redoit:
 364 #endif
 365
 366         memset((char *)&from,0,sizeof(from));
 367         len=sizeof(from);
 368         ret=accept(acc_sock,(struct sockaddr *)&from,&len);
 369         if (ret == INVALID_SOCKET)
 370                 {
 371 #ifdef WINDOWS
 372                 i=WSAGetLastError();
 373                 BIO_printf(bio_err,"accept error %d\n",i);
 374 #else
 375                 if (errno == EINTR)
 376                         {
 377                         /*check_timeout(); */
 378                         goto redoit;
 379                         }
 380                 fprintf(stderr,"errno=%d ",errno);
 381                 perror("accept");
 382 #endif
 383                 return(0);
 384                 }
 385
 386 /*
 387         ling.l_onoff=1;
 388         ling.l_linger=0;
 389         i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
 390         if (i < 0) { perror("linger"); return(0); }
 391         i=0;
 392         i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 393         if (i < 0) { perror("keepalive"); return(0); }
 394 */
 395
 396         if (host == NULL) goto end;
 397 #ifndef BIT_FIELD_LIMITS
 398         /* I should use WSAAsyncGetHostByName() under windows */
 399         h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
 400                 sizeof(from.sin_addr.s_addr),AF_INET);
 401 #else
 402         h1=gethostbyaddr((char *)&from.sin_addr,
 403                 sizeof(struct in_addr),AF_INET);
 404 #endif
 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 extract_host_port(char *str, char **host_ptr, unsigned char *ip,
 439              short *port_ptr)
 440         {
 441         char *h,*p;
 442
 443         h=str;
 444         p=strchr(str,':');
 445         if (p == NULL)
 446                 {
 447                 BIO_printf(bio_err,"no port defined\n");
 448                 return(0);
 449                 }
 450         *(p++)='\0';
 451
 452         if ((ip != NULL) && !host_ip(str,ip))
 453                 goto err;
 454         if (host_ptr != NULL) *host_ptr=h;
 455
 456         if (!extract_port(p,port_ptr))
 457                 goto err;
 458         return(1);
 459 err:
 460         return(0);
 461         }
 462
 463 int host_ip(char *str, unsigned char ip[4])
 464         {
 465         unsigned int in[4];
 466         int i;
 467
 468         if (sscanf(str,"%d.%d.%d.%d",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
 469                 {
 470                 for (i=0; i<4; i++)
 471                         if (in[i] > 255)
 472                                 {
 473                                 BIO_printf(bio_err,"invalid IP address\n");
 474                                 goto err;
 475                                 }
 476                 ip[0]=in[0];
 477                 ip[1]=in[1];
 478                 ip[2]=in[2];
 479                 ip[3]=in[3];
 480                 }
 481         else
 482                 { /* do a gethostbyname */
 483                 struct hostent *he;
 484
 485                 if (!sock_init()) return(0);
 486
 487                 he=GetHostByName(str);
 488                 if (he == NULL)
 489                         {
 490                         BIO_printf(bio_err,"gethostbyname failure\n");
 491                         goto err;
 492                         }
 493                 /* cast to short because of win16 winsock definition */
 494                 if ((short)he->h_addrtype != AF_INET)
 495                         {
 496                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 497                         return(0);
 498                         }
 499                 ip[0]=he->h_addr_list[0][0];
 500                 ip[1]=he->h_addr_list[0][1];
 501                 ip[2]=he->h_addr_list[0][2];
 502                 ip[3]=he->h_addr_list[0][3];
 503                 }
 504         return(1);
 505 err:
 506         return(0);
 507         }
 508
 509 int extract_port(char *str, short *port_ptr)
 510         {
 511         int i;
 512         struct servent *s;
 513
 514         i=atoi(str);
 515         if (i != 0)
 516                 *port_ptr=(unsigned short)i;
 517         else
 518                 {
 519                 s=getservbyname(str,"tcp");
 520                 if (s == NULL)
 521                         {
 522                         BIO_printf(bio_err,"getservbyname failure for %s\n",str);
 523                         return(0);
 524                         }
 525                 *port_ptr=ntohs((unsigned short)s->s_port);
 526                 }
 527         return(1);
 528         }
 529
 530 #define GHBN_NUM        4
 531 static struct ghbn_cache_st
 532         {
 533         char name[128];
 534         struct hostent ent;
 535         unsigned long order;
 536         } ghbn_cache[GHBN_NUM];
 537
 538 static unsigned long ghbn_hits=0L;
 539 static unsigned long ghbn_miss=0L;
 540
 541 static struct hostent *GetHostByName(char *name)
 542         {
 543         struct hostent *ret;
 544         int i,lowi=0;
 545         unsigned long low= (unsigned long)-1;
 546
 547         for (i=0; i<GHBN_NUM; i++)
 548                 {
 549                 if (low > ghbn_cache[i].order)
 550                         {
 551                         low=ghbn_cache[i].order;
 552                         lowi=i;
 553                         }
 554                 if (ghbn_cache[i].order > 0)
 555                         {
 556                         if (strncmp(name,ghbn_cache[i].name,128) == 0)
 557                                 break;
 558                         }
 559                 }
 560         if (i == GHBN_NUM) /* no hit*/
 561                 {
 562                 ghbn_miss++;
 563                 ret=gethostbyname(name);
 564                 if (ret == NULL) return(NULL);
 565                 /* else add to cache */
 566                 strncpy(ghbn_cache[lowi].name,name,128);
 567                 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
 568                 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
 569                 return(ret);
 570                 }
 571         else
 572                 {
 573                 ghbn_hits++;
 574                 ret= &(ghbn_cache[i].ent);
 575                 ghbn_cache[i].order=ghbn_miss+ghbn_hits;
 576                 return(ret);
 577                 }
 578         }
 579
 580 #ifndef MSDOS
 581 int spawn(int argc, char **argv, int *in, int *out)
 582         {
 583         int pid;
 584 #define CHILD_READ      p1[0]
 585 #define CHILD_WRITE     p2[1]
 586 #define PARENT_READ     p2[0]
 587 #define PARENT_WRITE    p1[1]
 588         int p1[2],p2[2];
 589
 590         if ((pipe(p1) < 0) || (pipe(p2) < 0)) return(-1);
 591
 592         if ((pid=fork()) == 0)
 593                 { /* child */
 594                 if (dup2(CHILD_WRITE,fileno(stdout)) < 0)
 595                         perror("dup2");
 596                 if (dup2(CHILD_WRITE,fileno(stderr)) < 0)
 597                         perror("dup2");
 598                 if (dup2(CHILD_READ,fileno(stdin)) < 0)
 599                         perror("dup2");
 600                 close(CHILD_READ);
 601                 close(CHILD_WRITE);
 602
 603                 close(PARENT_READ);
 604                 close(PARENT_WRITE);
 605                 execvp(argv[0],argv);
 606                 perror("child");
 607                 exit(1);
 608                 }
 609
 610         /* parent */
 611         *in= PARENT_READ;
 612         *out=PARENT_WRITE;
 613         close(CHILD_READ);
 614         close(CHILD_WRITE);
 615         return(pid);
 616         }
 617 #endif /* MSDOS */
 618
 619
 620 #ifdef undef
 621         /* Turn on synchronous sockets so that we can do a WaitForMultipleObjects
 622          * on sockets */
 623         {
 624         SOCKET s;
 625         int optionValue = SO_SYNCHRONOUS_NONALERT;
 626         int err;
 627
 628         err = setsockopt(
 629             INVALID_SOCKET,
 630             SOL_SOCKET,
 631             SO_OPENTYPE,
 632             (char *)&optionValue,
 633             sizeof(optionValue));
 634         if (err != NO_ERROR) {
 635         /* failed for some reason... */
 636                 BIO_printf(bio_err, "failed to setsockopt(SO_OPENTYPE, SO_SYNCHRONOUS_ALERT) - %d\n",
 637                         WSAGetLastError());
 638                 }
 639         }
 640 #endif