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
  65 /* With IPv6, it looks like Digital has mixed up the proper order of
  66    recursive header file inclusion, resulting in the compiler complaining
  67    that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
  68    is needed to have fileno() declared correctly...  So let's define u_int */
  69 #if defined(VMS) && defined(__DECC) && !defined(__U_INT)
  70 #define __U_INT
  71 typedef unsigned int u_int;
  72 #endif
  73
  74 #define USE_SOCKETS
  75 #define NON_MAIN
  76 #include "apps.h"
  77 #undef USE_SOCKETS
  78 #undef NON_MAIN
  79 #include "s_apps.h"
  80 #include <openssl/ssl.h>
  81
  82 #ifdef VMS
  83 #if (__VMS_VER < 70000000) /* FIONBIO used as a switch to enable ioctl,
  84                               and that isn't in VMS < 7.0 */
  85 #undef FIONBIO
  86 #endif
  87 #include <processes.h> /* for vfork() */
  88 #endif
  89
  90 static struct hostent *GetHostByName(char *name);
  91 int sock_init(void );
  92 #ifdef WIN16
  93 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
  94 #else
  95 #define SOCKET_PROTOCOL IPPROTO_TCP
  96 #endif
  97
  98 #ifdef WINDOWS
  99 static struct WSAData wsa_state;
 100 static int wsa_init_done=0;
 101
 102 #ifdef WIN16
 103 static HWND topWnd=0;
 104 static FARPROC lpTopWndProc=NULL;
 105 static FARPROC lpTopHookProc=NULL;
 106 extern HINSTANCE _hInstance;  /* nice global CRT provides */
 107
 108 static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam,
 109              LPARAM lParam)
 110         {
 111         if (hwnd == topWnd)
 112                 {
 113                 switch(message)
 114                         {
 115                 case WM_DESTROY:
 116                 case WM_CLOSE:
 117                         SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc);
 118                         sock_cleanup();
 119                         break;
 120                         }
 121                 }
 122         return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam);
 123         }
 124
 125 static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam)
 126         {
 127         topWnd=hwnd;
 128         return(FALSE);
 129         }
 130
 131 #endif /* WIN32 */
 132 #endif /* WINDOWS */
 133
 134 void sock_cleanup(void)
 135         {
 136 #ifdef WINDOWS
 137         if (wsa_init_done)
 138                 {
 139                 wsa_init_done=0;
 140                 WSACancelBlockingCall();
 141                 WSACleanup();
 142                 }
 143 #endif
 144         }
 145
 146 int sock_init(void)
 147         {
 148 #ifdef WINDOWS
 149         if (!wsa_init_done)
 150                 {
 151                 int err;
 152
 153 #ifdef SIGINT
 154                 signal(SIGINT,(void (*)(int))sock_cleanup);
 155 #endif
 156                 wsa_init_done=1;
 157                 memset(&wsa_state,0,sizeof(wsa_state));
 158                 if (WSAStartup(0x0101,&wsa_state)!=0)
 159                         {
 160                         err=WSAGetLastError();
 161                         BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
 162                         return(0);
 163                         }
 164
 165 #ifdef WIN16
 166                 EnumTaskWindows(GetCurrentTask(),enumproc,0L);
 167                 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
 168                 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
 169
 170                 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
 171 #endif /* WIN16 */
 172                 }
 173 #endif /* WINDOWS */
 174         return(1);
 175         }
 176
 177 int init_client(int *sock, char *host, int port)
 178         {
 179         unsigned char ip[4];
 180         short p=0;
 181
 182         if (!host_ip(host,&(ip[0])))
 183                 {
 184                 return(0);
 185                 }
 186         if (p != 0) port=p;
 187         return(init_client_ip(sock,ip,port));
 188         }
 189
 190 int init_client_ip(int *sock, unsigned char ip[4], int port)
 191         {
 192         unsigned long addr;
 193         struct sockaddr_in them;
 194         int s,i;
 195
 196         if (!sock_init()) return(0);
 197
 198         memset((char *)&them,0,sizeof(them));
 199         them.sin_family=AF_INET;
 200         them.sin_port=htons((unsigned short)port);
 201         addr=(unsigned long)
 202                 ((unsigned long)ip[0]<<24L)|
 203                 ((unsigned long)ip[1]<<16L)|
 204                 ((unsigned long)ip[2]<< 8L)|
 205                 ((unsigned long)ip[3]);
 206         them.sin_addr.s_addr=htonl(addr);
 207
 208         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 209         if (s == INVALID_SOCKET) { perror("socket"); return(0); }
 210
 211         i=0;
 212         i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 213         if (i < 0) { perror("keepalive"); return(0); }
 214
 215         if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
 216                 { close(s); perror("connect"); return(0); }
 217         *sock=s;
 218         return(1);
 219         }
 220
 221 int nbio_sock_error(int sock)
 222         {
 223         int j,i;
 224         int size;
 225
 226         size=sizeof(int);
 227         /* Note: under VMS with SOCKETSHR the third parameter is currently
 228          * of type (int *) whereas under other systems it is (void *) if
 229          * you don't have a cast it will choke the compiler: if you do
 230          * have a cast then you can either go for (int *) or (void *).
 231          */
 232         i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(char *)&j,(void *)&size);
 233         if (i < 0)
 234                 return(1);
 235         else
 236                 return(j);
 237         }
 238
 239 int nbio_init_client_ip(int *sock, unsigned char ip[4], int port)
 240         {
 241         unsigned long addr;
 242         struct sockaddr_in them;
 243         int s,i;
 244
 245         if (!sock_init()) return(0);
 246
 247         memset((char *)&them,0,sizeof(them));
 248         them.sin_family=AF_INET;
 249         them.sin_port=htons((unsigned short)port);
 250         addr=   (unsigned long)
 251                 ((unsigned long)ip[0]<<24L)|
 252                 ((unsigned long)ip[1]<<16L)|
 253                 ((unsigned long)ip[2]<< 8L)|
 254                 ((unsigned long)ip[3]);
 255         them.sin_addr.s_addr=htonl(addr);
 256
 257         if (*sock <= 0)
 258                 {
 259 #ifdef FIONBIO
 260                 unsigned long l=1;
 261 #endif
 262
 263                 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 264                 if (s == INVALID_SOCKET) { perror("socket"); return(0); }
 265
 266                 i=0;
 267                 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 268                 if (i < 0) { perror("keepalive"); return(0); }
 269                 *sock=s;
 270
 271 #ifdef FIONBIO
 272                 BIO_socket_ioctl(s,FIONBIO,&l);
 273 #endif
 274                 }
 275         else
 276                 s= *sock;
 277
 278         i=connect(s,(struct sockaddr *)&them,sizeof(them));
 279         if (i == INVALID_SOCKET)
 280                 {
 281                 if (BIO_sock_should_retry(i))
 282                         return(-1);
 283                 else
 284                         return(0);
 285                 }
 286         else
 287                 return(1);
 288         }
 289
 290 int do_server(int port, int *ret, int (*cb)(), char *context)
 291         {
 292         int sock;
 293         char *name;
 294         int accept_socket;
 295         int i;
 296
 297         if (!init_server(&accept_socket,port)) return(0);
 298
 299         if (ret != NULL)
 300                 {
 301                 *ret=accept_socket;
 302                 /* return(1);*/
 303                 }
 304         for (;;)
 305                 {
 306                 if (do_accept(accept_socket,&sock,&name) == 0)
 307                         {
 308                         SHUTDOWN(accept_socket);
 309                         return(0);
 310                         }
 311                 i=(*cb)(name,sock, context);
 312                 if (name != NULL) Free(name);
 313                 SHUTDOWN2(sock);
 314                 if (i < 0)
 315                         {
 316                         SHUTDOWN2(accept_socket);
 317                         return(i);
 318                         }
 319                 }
 320         }
 321
 322 int init_server_long(int *sock, int port, 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,
 349                            (void *) &j, sizeof j);
 350                 }
 351 #endif
 352         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
 353                 {
 354 #ifndef WINDOWS
 355                 perror("bind");
 356 #endif
 357                 goto err;
 358                 }
 359         /* Make it 128 for linux */
 360         if (listen(s,128) == -1) goto err;
 361         i=0;
 362         *sock=s;
 363         ret=1;
 364 err:
 365         if ((ret == 0) && (s != -1))
 366                 {
 367                 SHUTDOWN(s);
 368                 }
 369         return(ret);
 370         }
 371
 372 int init_server(int *sock, int port)
 373         {
 374         return(init_server_long(sock, port, NULL));
 375         }
 376
 377 int do_accept(int acc_sock, int *sock, char **host)
 378         {
 379         int ret,i;
 380         struct hostent *h1,*h2;
 381         static struct sockaddr_in from;
 382         int len;
 383 /*      struct linger ling; */
 384
 385         if (!sock_init()) return(0);
 386
 387 #ifndef WINDOWS
 388 redoit:
 389 #endif
 390
 391         memset((char *)&from,0,sizeof(from));
 392         len=sizeof(from);
 393         /* Note: under VMS with SOCKETSHR the fourth parameter is currently
 394          * of type (int *) whereas under other systems it is (void *) if
 395          * you don't have a cast it will choke the compiler: if you do
 396          * have a cast then you can either go for (int *) or (void *).
 397          */
 398         ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
 399         if (ret == INVALID_SOCKET)
 400                 {
 401 #ifdef WINDOWS
 402                 i=WSAGetLastError();
 403                 BIO_printf(bio_err,"accept error %d\n",i);
 404 #else
 405                 if (errno == EINTR)
 406                         {
 407                         /*check_timeout(); */
 408                         goto redoit;
 409                         }
 410                 fprintf(stderr,"errno=%d ",errno);
 411                 perror("accept");
 412 #endif
 413                 return(0);
 414                 }
 415
 416 /*
 417         ling.l_onoff=1;
 418         ling.l_linger=0;
 419         i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
 420         if (i < 0) { perror("linger"); return(0); }
 421         i=0;
 422         i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 423         if (i < 0) { perror("keepalive"); return(0); }
 424 */
 425
 426         if (host == NULL) goto end;
 427 #ifndef BIT_FIELD_LIMITS
 428         /* I should use WSAAsyncGetHostByName() under windows */
 429         h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
 430                 sizeof(from.sin_addr.s_addr),AF_INET);
 431 #else
 432         h1=gethostbyaddr((char *)&from.sin_addr,
 433                 sizeof(struct in_addr),AF_INET);
 434 #endif
 435         if (h1 == NULL)
 436                 {
 437                 BIO_printf(bio_err,"bad gethostbyaddr\n");
 438                 *host=NULL;
 439                 /* return(0); */
 440                 }
 441         else
 442                 {
 443                 if ((*host=(char *)Malloc(strlen(h1->h_name)+1)) == NULL)
 444                         {
 445                         perror("Malloc");
 446                         return(0);
 447                         }
 448                 strcpy(*host,h1->h_name);
 449
 450                 h2=GetHostByName(*host);
 451                 if (h2 == NULL)
 452                         {
 453                         BIO_printf(bio_err,"gethostbyname failure\n");
 454                         return(0);
 455                         }
 456                 i=0;
 457                 if (h2->h_addrtype != AF_INET)
 458                         {
 459                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 460                         return(0);
 461                         }
 462                 }
 463 end:
 464         *sock=ret;
 465         return(1);
 466         }
 467
 468 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
 469              short *port_ptr)
 470         {
 471         char *h,*p;
 472
 473         h=str;
 474         p=strchr(str,':');
 475         if (p == NULL)
 476                 {
 477                 BIO_printf(bio_err,"no port defined\n");
 478                 return(0);
 479                 }
 480         *(p++)='\0';
 481
 482         if ((ip != NULL) && !host_ip(str,ip))
 483                 goto err;
 484         if (host_ptr != NULL) *host_ptr=h;
 485
 486         if (!extract_port(p,port_ptr))
 487                 goto err;
 488         return(1);
 489 err:
 490         return(0);
 491         }
 492
 493 int host_ip(char *str, unsigned char ip[4])
 494         {
 495         unsigned int in[4];
 496         int i;
 497
 498         if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
 499                 {
 500                 for (i=0; i<4; i++)
 501                         if (in[i] > 255)
 502                                 {
 503                                 BIO_printf(bio_err,"invalid IP address\n");
 504                                 goto err;
 505                                 }
 506                 ip[0]=in[0];
 507                 ip[1]=in[1];
 508                 ip[2]=in[2];
 509                 ip[3]=in[3];
 510                 }
 511         else
 512                 { /* do a gethostbyname */
 513                 struct hostent *he;
 514
 515                 if (!sock_init()) return(0);
 516
 517                 he=GetHostByName(str);
 518                 if (he == NULL)
 519                         {
 520                         BIO_printf(bio_err,"gethostbyname failure\n");
 521                         goto err;
 522                         }
 523                 /* cast to short because of win16 winsock definition */
 524                 if ((short)he->h_addrtype != AF_INET)
 525                         {
 526                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 527                         return(0);
 528                         }
 529                 ip[0]=he->h_addr_list[0][0];
 530                 ip[1]=he->h_addr_list[0][1];
 531                 ip[2]=he->h_addr_list[0][2];
 532                 ip[3]=he->h_addr_list[0][3];
 533                 }
 534         return(1);
 535 err:
 536         return(0);
 537         }
 538
 539 int extract_port(char *str, short *port_ptr)
 540         {
 541         int i;
 542         struct servent *s;
 543
 544         i=atoi(str);
 545         if (i != 0)
 546                 *port_ptr=(unsigned short)i;
 547         else
 548                 {
 549                 s=getservbyname(str,"tcp");
 550                 if (s == NULL)
 551                         {
 552                         BIO_printf(bio_err,"getservbyname failure for %s\n",str);
 553                         return(0);
 554                         }
 555                 *port_ptr=ntohs((unsigned short)s->s_port);
 556                 }
 557         return(1);
 558         }
 559
 560 #define GHBN_NUM        4
 561 static struct ghbn_cache_st
 562         {
 563         char name[128];
 564         struct hostent ent;
 565         unsigned long order;
 566         } ghbn_cache[GHBN_NUM];
 567
 568 static unsigned long ghbn_hits=0L;
 569 static unsigned long ghbn_miss=0L;
 570
 571 static struct hostent *GetHostByName(char *name)
 572         {
 573         struct hostent *ret;
 574         int i,lowi=0;
 575         unsigned long low= (unsigned long)-1;
 576
 577         for (i=0; i<GHBN_NUM; i++)
 578                 {
 579                 if (low > ghbn_cache[i].order)
 580                         {
 581                         low=ghbn_cache[i].order;
 582                         lowi=i;
 583                         }
 584                 if (ghbn_cache[i].order > 0)
 585                         {
 586                         if (strncmp(name,ghbn_cache[i].name,128) == 0)
 587                                 break;
 588                         }
 589                 }
 590         if (i == GHBN_NUM) /* no hit*/
 591                 {
 592                 ghbn_miss++;
 593                 ret=gethostbyname(name);
 594                 if (ret == NULL) return(NULL);
 595                 /* else add to cache */
 596                 strncpy(ghbn_cache[lowi].name,name,128);
 597                 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
 598                 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
 599                 return(ret);
 600                 }
 601         else
 602                 {
 603                 ghbn_hits++;
 604                 ret= &(ghbn_cache[i].ent);
 605                 ghbn_cache[i].order=ghbn_miss+ghbn_hits;
 606                 return(ret);
 607                 }
 608         }
 609
 610 #ifndef MSDOS
 611 int spawn(int argc, char **argv, int *in, int *out)
 612         {
 613         int pid;
 614 #define CHILD_READ      p1[0]
 615 #define CHILD_WRITE     p2[1]
 616 #define PARENT_READ     p2[0]
 617 #define PARENT_WRITE    p1[1]
 618         int p1[2],p2[2];
 619
 620         if ((pipe(p1) < 0) || (pipe(p2) < 0)) return(-1);
 621
 622 #ifdef VMS
 623         if ((pid=vfork()) == 0)
 624 #else
 625         if ((pid=fork()) == 0)
 626 #endif
 627                 { /* child */
 628                 if (dup2(CHILD_WRITE,fileno(stdout)) < 0)
 629                         perror("dup2");
 630                 if (dup2(CHILD_WRITE,fileno(stderr)) < 0)
 631                         perror("dup2");
 632                 if (dup2(CHILD_READ,fileno(stdin)) < 0)
 633                         perror("dup2");
 634                 close(CHILD_READ);
 635                 close(CHILD_WRITE);
 636
 637                 close(PARENT_READ);
 638                 close(PARENT_WRITE);
 639                 execvp(argv[0],argv);
 640                 perror("child");
 641                 exit(1);
 642                 }
 643
 644         /* parent */
 645         *in= PARENT_READ;
 646         *out=PARENT_WRITE;
 647         close(CHILD_READ);
 648         close(CHILD_WRITE);
 649         return(pid);
 650         }
 651 #endif /* MSDOS */
 652
 653
 654 #ifdef undef
 655         /* Turn on synchronous sockets so that we can do a WaitForMultipleObjects
 656          * on sockets */
 657         {
 658         SOCKET s;
 659         int optionValue = SO_SYNCHRONOUS_NONALERT;
 660         int err;
 661
 662         err = setsockopt(
 663             INVALID_SOCKET,
 664             SOL_SOCKET,
 665             SO_OPENTYPE,
 666             (char *)&optionValue,
 667             sizeof(optionValue));
 668         if (err != NO_ERROR) {
 669         /* failed for some reason... */
 670                 BIO_printf(bio_err, "failed to setsockopt(SO_OPENTYPE, SO_SYNCHRONOUS_ALERT) - %d\n",
 671                         WSAGetLastError());
 672                 }
 673         }
 674 #endif