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 /* With IPv6, it looks like Digital has mixed up the proper order of
  60    recursive header file inclusion, resulting in the compiler complaining
  61    that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
  62    is needed to have fileno() declared correctly...  So let's define u_int */
  63 #if defined(VMS) && defined(__DECC) && !defined(__U_INT)
  64 #define __U_INT
  65 typedef unsigned int u_int;
  66 #endif
  67
  68 #include <stdio.h>
  69 #include <stdlib.h>
  70 #include <string.h>
  71 #include <errno.h>
  72 #include <signal.h>
  73 #define USE_SOCKETS
  74 #define NON_MAIN
  75 #include "apps.h"
  76 #undef USE_SOCKETS
  77 #undef NON_MAIN
  78 #include "s_apps.h"
  79 #include <openssl/ssl.h>
  80
  81 #ifdef VMS
  82 #if (__VMS_VER < 70000000) /* FIONBIO used as a switch to enable ioctl,
  83                               and that isn't in VMS < 7.0 */
  84 #undef FIONBIO
  85 #endif
  86 #include <processes.h> /* for vfork() */
  87 #endif
  88
  89 static struct hostent *GetHostByName(char *name);
  90 int sock_init(void );
  91 #ifdef WIN16
  92 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
  93 #else
  94 #define SOCKET_PROTOCOL IPPROTO_TCP
  95 #endif
  96
  97 #ifdef WINDOWS
  98 static struct WSAData wsa_state;
  99 static int wsa_init_done=0;
 100
 101 #ifdef WIN16
 102 static HWND topWnd=0;
 103 static FARPROC lpTopWndProc=NULL;
 104 static FARPROC lpTopHookProc=NULL;
 105 extern HINSTANCE _hInstance;  /* nice global CRT provides */
 106
 107 static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam,
 108              LPARAM lParam)
 109         {
 110         if (hwnd == topWnd)
 111                 {
 112                 switch(message)
 113                         {
 114                 case WM_DESTROY:
 115                 case WM_CLOSE:
 116                         SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc);
 117                         sock_cleanup();
 118                         break;
 119                         }
 120                 }
 121         return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam);
 122         }
 123
 124 static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam)
 125         {
 126         topWnd=hwnd;
 127         return(FALSE);
 128         }
 129
 130 #endif /* WIN32 */
 131 #endif /* WINDOWS */
 132
 133 void sock_cleanup(void)
 134         {
 135 #ifdef WINDOWS
 136         if (wsa_init_done)
 137                 {
 138                 wsa_init_done=0;
 139                 WSACancelBlockingCall();
 140                 WSACleanup();
 141                 }
 142 #endif
 143         }
 144
 145 int sock_init(void)
 146         {
 147 #ifdef WINDOWS
 148         if (!wsa_init_done)
 149                 {
 150                 int err;
 151
 152 #ifdef SIGINT
 153                 signal(SIGINT,(void (*)(int))sock_cleanup);
 154 #endif
 155                 wsa_init_done=1;
 156                 memset(&wsa_state,0,sizeof(wsa_state));
 157                 if (WSAStartup(0x0101,&wsa_state)!=0)
 158                         {
 159                         err=WSAGetLastError();
 160                         BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
 161                         return(0);
 162                         }
 163
 164 #ifdef WIN16
 165                 EnumTaskWindows(GetCurrentTask(),enumproc,0L);
 166                 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
 167                 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
 168
 169                 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
 170 #endif /* WIN16 */
 171                 }
 172 #endif /* WINDOWS */
 173         return(1);
 174         }
 175
 176 int init_client(int *sock, char *host, int port)
 177         {
 178         unsigned char ip[4];
 179         short p=0;
 180
 181         if (!host_ip(host,&(ip[0])))
 182                 {
 183                 return(0);
 184                 }
 185         if (p != 0) port=p;
 186         return(init_client_ip(sock,ip,port));
 187         }
 188
 189 int init_client_ip(int *sock, unsigned char ip[4], int port)
 190         {
 191         unsigned long addr;
 192         struct sockaddr_in them;
 193         int s,i;
 194
 195         if (!sock_init()) return(0);
 196
 197         memset((char *)&them,0,sizeof(them));
 198         them.sin_family=AF_INET;
 199         them.sin_port=htons((unsigned short)port);
 200         addr=(unsigned long)
 201                 ((unsigned long)ip[0]<<24L)|
 202                 ((unsigned long)ip[1]<<16L)|
 203                 ((unsigned long)ip[2]<< 8L)|
 204                 ((unsigned long)ip[3]);
 205         them.sin_addr.s_addr=htonl(addr);
 206
 207         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 208         if (s == INVALID_SOCKET) { perror("socket"); return(0); }
 209
 210         i=0;
 211         i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 212         if (i < 0) { perror("keepalive"); return(0); }
 213
 214         if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
 215                 { close(s); perror("connect"); return(0); }
 216         *sock=s;
 217         return(1);
 218         }
 219
 220 int nbio_sock_error(int sock)
 221         {
 222         int j,i;
 223         int size;
 224
 225         size=sizeof(int);
 226         /* Note: under VMS with SOCKETSHR the third parameter is currently
 227          * of type (int *) whereas under other systems it is (void *) if
 228          * you don't have a cast it will choke the compiler: if you do
 229          * have a cast then you can either go for (int *) or (void *).
 230          */
 231         i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(char *)&j,(void *)&size);
 232         if (i < 0)
 233                 return(1);
 234         else
 235                 return(j);
 236         }
 237
 238 int nbio_init_client_ip(int *sock, unsigned char ip[4], int port)
 239         {
 240         unsigned long addr;
 241         struct sockaddr_in them;
 242         int s,i;
 243
 244         if (!sock_init()) return(0);
 245
 246         memset((char *)&them,0,sizeof(them));
 247         them.sin_family=AF_INET;
 248         them.sin_port=htons((unsigned short)port);
 249         addr=   (unsigned long)
 250                 ((unsigned long)ip[0]<<24L)|
 251                 ((unsigned long)ip[1]<<16L)|
 252                 ((unsigned long)ip[2]<< 8L)|
 253                 ((unsigned long)ip[3]);
 254         them.sin_addr.s_addr=htonl(addr);
 255
 256         if (*sock <= 0)
 257                 {
 258 #ifdef FIONBIO
 259                 unsigned long l=1;
 260 #endif
 261
 262                 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 263                 if (s == INVALID_SOCKET) { perror("socket"); return(0); }
 264
 265                 i=0;
 266                 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 267                 if (i < 0) { perror("keepalive"); return(0); }
 268                 *sock=s;
 269
 270 #ifdef FIONBIO
 271                 BIO_socket_ioctl(s,FIONBIO,&l);
 272 #endif
 273                 }
 274         else
 275                 s= *sock;
 276
 277         i=connect(s,(struct sockaddr *)&them,sizeof(them));
 278         if (i == INVALID_SOCKET)
 279                 {
 280                 if (BIO_sock_should_retry(i))
 281                         return(-1);
 282                 else
 283                         return(0);
 284                 }
 285         else
 286                 return(1);
 287         }
 288
 289 int do_server(int port, int *ret, int (*cb)(), char *context)
 290         {
 291         int sock;
 292         char *name;
 293         int accept_socket;
 294         int i;
 295
 296         if (!init_server(&accept_socket,port)) return(0);
 297
 298         if (ret != NULL)
 299                 {
 300                 *ret=accept_socket;
 301                 /* return(1);*/
 302                 }
 303         for (;;)
 304                 {
 305                 if (do_accept(accept_socket,&sock,&name) == 0)
 306                         {
 307                         SHUTDOWN(accept_socket);
 308                         return(0);
 309                         }
 310                 i=(*cb)(name,sock, context);
 311                 if (name != NULL) Free(name);
 312                 SHUTDOWN2(sock);
 313                 if (i < 0)
 314                         {
 315                         SHUTDOWN2(accept_socket);
 316                         return(i);
 317                         }
 318                 }
 319         }
 320
 321 int init_server_long(int *sock, int port, char *ip)
 322         {
 323         int ret=0;
 324         struct sockaddr_in server;
 325         int s= -1,i;
 326
 327         if (!sock_init()) return(0);
 328
 329         memset((char *)&server,0,sizeof(server));
 330         server.sin_family=AF_INET;
 331         server.sin_port=htons((unsigned short)port);
 332         if (ip == NULL)
 333                 server.sin_addr.s_addr=INADDR_ANY;
 334         else
 335 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
 336 #ifndef BIT_FIELD_LIMITS
 337                 memcpy(&server.sin_addr.s_addr,ip,4);
 338 #else
 339                 memcpy(&server.sin_addr,ip,4);
 340 #endif
 341         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 342
 343         if (s == INVALID_SOCKET) goto err;
 344 #if defined SOL_SOCKET && defined SO_REUSEADDR
 345                 {
 346                 int j = 1;
 347                 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
 348                            (void *) &j, sizeof j);
 349                 }
 350 #endif
 351         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
 352                 {
 353 #ifndef WINDOWS
 354                 perror("bind");
 355 #endif
 356                 goto err;
 357                 }
 358         /* Make it 128 for linux */
 359         if (listen(s,128) == -1) goto err;
 360         i=0;
 361         *sock=s;
 362         ret=1;
 363 err:
 364         if ((ret == 0) && (s != -1))
 365                 {
 366                 SHUTDOWN(s);
 367                 }
 368         return(ret);
 369         }
 370
 371 int init_server(int *sock, int port)
 372         {
 373         return(init_server_long(sock, port, NULL));
 374         }
 375
 376 int do_accept(int acc_sock, int *sock, char **host)
 377         {
 378         int ret,i;
 379         struct hostent *h1,*h2;
 380         static struct sockaddr_in from;
 381         int len;
 382 /*      struct linger ling; */
 383
 384         if (!sock_init()) return(0);
 385
 386 #ifndef WINDOWS
 387 redoit:
 388 #endif
 389
 390         memset((char *)&from,0,sizeof(from));
 391         len=sizeof(from);
 392         /* Note: under VMS with SOCKETSHR the fourth parameter is currently
 393          * of type (int *) whereas under other systems it is (void *) if
 394          * you don't have a cast it will choke the compiler: if you do
 395          * have a cast then you can either go for (int *) or (void *).
 396          */
 397         ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
 398         if (ret == INVALID_SOCKET)
 399                 {
 400 #ifdef WINDOWS
 401                 i=WSAGetLastError();
 402                 BIO_printf(bio_err,"accept error %d\n",i);
 403 #else
 404                 if (errno == EINTR)
 405                         {
 406                         /*check_timeout(); */
 407                         goto redoit;
 408                         }
 409                 fprintf(stderr,"errno=%d ",errno);
 410                 perror("accept");
 411 #endif
 412                 return(0);
 413                 }
 414
 415 /*
 416         ling.l_onoff=1;
 417         ling.l_linger=0;
 418         i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
 419         if (i < 0) { perror("linger"); return(0); }
 420         i=0;
 421         i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 422         if (i < 0) { perror("keepalive"); return(0); }
 423 */
 424
 425         if (host == NULL) goto end;
 426 #ifndef BIT_FIELD_LIMITS
 427         /* I should use WSAAsyncGetHostByName() under windows */
 428         h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
 429                 sizeof(from.sin_addr.s_addr),AF_INET);
 430 #else
 431         h1=gethostbyaddr((char *)&from.sin_addr,
 432                 sizeof(struct in_addr),AF_INET);
 433 #endif
 434         if (h1 == NULL)
 435                 {
 436                 BIO_printf(bio_err,"bad gethostbyaddr\n");
 437                 *host=NULL;
 438                 /* return(0); */
 439                 }
 440         else
 441                 {
 442                 if ((*host=(char *)Malloc(strlen(h1->h_name)+1)) == NULL)
 443                         {
 444                         perror("Malloc");
 445                         return(0);
 446                         }
 447                 strcpy(*host,h1->h_name);
 448
 449                 h2=GetHostByName(*host);
 450                 if (h2 == NULL)
 451                         {
 452                         BIO_printf(bio_err,"gethostbyname failure\n");
 453                         return(0);
 454                         }
 455                 i=0;
 456                 if (h2->h_addrtype != AF_INET)
 457                         {
 458                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 459                         return(0);
 460                         }
 461                 }
 462 end:
 463         *sock=ret;
 464         return(1);
 465         }
 466
 467 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
 468              short *port_ptr)
 469         {
 470         char *h,*p;
 471
 472         h=str;
 473         p=strchr(str,':');
 474         if (p == NULL)
 475                 {
 476                 BIO_printf(bio_err,"no port defined\n");
 477                 return(0);
 478                 }
 479         *(p++)='\0';
 480
 481         if ((ip != NULL) && !host_ip(str,ip))
 482                 goto err;
 483         if (host_ptr != NULL) *host_ptr=h;
 484
 485         if (!extract_port(p,port_ptr))
 486                 goto err;
 487         return(1);
 488 err:
 489         return(0);
 490         }
 491
 492 int host_ip(char *str, unsigned char ip[4])
 493         {
 494         unsigned int in[4];
 495         int i;
 496
 497         if (sscanf(str,"%d.%d.%d.%d",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
 498                 {
 499                 for (i=0; i<4; i++)
 500                         if (in[i] > 255)
 501                                 {
 502                                 BIO_printf(bio_err,"invalid IP address\n");
 503                                 goto err;
 504                                 }
 505                 ip[0]=in[0];
 506                 ip[1]=in[1];
 507                 ip[2]=in[2];
 508                 ip[3]=in[3];
 509                 }
 510         else
 511                 { /* do a gethostbyname */
 512                 struct hostent *he;
 513
 514                 if (!sock_init()) return(0);
 515
 516                 he=GetHostByName(str);
 517                 if (he == NULL)
 518                         {
 519                         BIO_printf(bio_err,"gethostbyname failure\n");
 520                         goto err;
 521                         }
 522                 /* cast to short because of win16 winsock definition */
 523                 if ((short)he->h_addrtype != AF_INET)
 524                         {
 525                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 526                         return(0);
 527                         }
 528                 ip[0]=he->h_addr_list[0][0];
 529                 ip[1]=he->h_addr_list[0][1];
 530                 ip[2]=he->h_addr_list[0][2];
 531                 ip[3]=he->h_addr_list[0][3];
 532                 }
 533         return(1);
 534 err:
 535         return(0);
 536         }
 537
 538 int extract_port(char *str, short *port_ptr)
 539         {
 540         int i;
 541         struct servent *s;
 542
 543         i=atoi(str);
 544         if (i != 0)
 545                 *port_ptr=(unsigned short)i;
 546         else
 547                 {
 548                 s=getservbyname(str,"tcp");
 549                 if (s == NULL)
 550                         {
 551                         BIO_printf(bio_err,"getservbyname failure for %s\n",str);
 552                         return(0);
 553                         }
 554                 *port_ptr=ntohs((unsigned short)s->s_port);
 555                 }
 556         return(1);
 557         }
 558
 559 #define GHBN_NUM        4
 560 static struct ghbn_cache_st
 561         {
 562         char name[128];
 563         struct hostent ent;
 564         unsigned long order;
 565         } ghbn_cache[GHBN_NUM];
 566
 567 static unsigned long ghbn_hits=0L;
 568 static unsigned long ghbn_miss=0L;
 569
 570 static struct hostent *GetHostByName(char *name)
 571         {
 572         struct hostent *ret;
 573         int i,lowi=0;
 574         unsigned long low= (unsigned long)-1;
 575
 576         for (i=0; i<GHBN_NUM; i++)
 577                 {
 578                 if (low > ghbn_cache[i].order)
 579                         {
 580                         low=ghbn_cache[i].order;
 581                         lowi=i;
 582                         }
 583                 if (ghbn_cache[i].order > 0)
 584                         {
 585                         if (strncmp(name,ghbn_cache[i].name,128) == 0)
 586                                 break;
 587                         }
 588                 }
 589         if (i == GHBN_NUM) /* no hit*/
 590                 {
 591                 ghbn_miss++;
 592                 ret=gethostbyname(name);
 593                 if (ret == NULL) return(NULL);
 594                 /* else add to cache */
 595                 strncpy(ghbn_cache[lowi].name,name,128);
 596                 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
 597                 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
 598                 return(ret);
 599                 }
 600         else
 601                 {
 602                 ghbn_hits++;
 603                 ret= &(ghbn_cache[i].ent);
 604                 ghbn_cache[i].order=ghbn_miss+ghbn_hits;
 605                 return(ret);
 606                 }
 607         }
 608
 609 #ifndef MSDOS
 610 int spawn(int argc, char **argv, int *in, int *out)
 611         {
 612         int pid;
 613 #define CHILD_READ      p1[0]
 614 #define CHILD_WRITE     p2[1]
 615 #define PARENT_READ     p2[0]
 616 #define PARENT_WRITE    p1[1]
 617         int p1[2],p2[2];
 618
 619         if ((pipe(p1) < 0) || (pipe(p2) < 0)) return(-1);
 620
 621 #ifdef VMS
 622         if ((pid=vfork()) == 0)
 623 #else
 624         if ((pid=fork()) == 0)
 625 #endif
 626                 { /* child */
 627                 if (dup2(CHILD_WRITE,fileno(stdout)) < 0)
 628                         perror("dup2");
 629                 if (dup2(CHILD_WRITE,fileno(stderr)) < 0)
 630                         perror("dup2");
 631                 if (dup2(CHILD_READ,fileno(stdin)) < 0)
 632                         perror("dup2");
 633                 close(CHILD_READ);
 634                 close(CHILD_WRITE);
 635
 636                 close(PARENT_READ);
 637                 close(PARENT_WRITE);
 638                 execvp(argv[0],argv);
 639                 perror("child");
 640                 exit(1);
 641                 }
 642
 643         /* parent */
 644         *in= PARENT_READ;
 645         *out=PARENT_WRITE;
 646         close(CHILD_READ);
 647         close(CHILD_WRITE);
 648         return(pid);
 649         }
 650 #endif /* MSDOS */
 651
 652
 653 #ifdef undef
 654         /* Turn on synchronous sockets so that we can do a WaitForMultipleObjects
 655          * on sockets */
 656         {
 657         SOCKET s;
 658         int optionValue = SO_SYNCHRONOUS_NONALERT;
 659         int err;
 660
 661         err = setsockopt(
 662             INVALID_SOCKET,
 663             SOL_SOCKET,
 664             SO_OPENTYPE,
 665             (char *)&optionValue,
 666             sizeof(optionValue));
 667         if (err != NO_ERROR) {
 668         /* failed for some reason... */
 669                 BIO_printf(bio_err, "failed to setsockopt(SO_OPENTYPE, SO_SYNCHRONOUS_ALERT) - %d\n",
 670                         WSAGetLastError());
 671                 }
 672         }
 673 #endif