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(__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 #if (__VMS_VER < 70000000) /* FIONBIO used as a switch to enable ioctl,
  82                               and that isn't in VMS < 7.0 */
  83 #undef FIONBIO
  84 #endif
  85 #ifdef VMS /* for vfork() */
  86 #include <processes.h>
  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                 unsigned long l=1;
 259
 260                 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 261                 if (s == INVALID_SOCKET) { perror("socket"); return(0); }
 262
 263                 i=0;
 264                 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 265                 if (i < 0) { perror("keepalive"); return(0); }
 266                 *sock=s;
 267
 268 #ifdef FIONBIO
 269                 BIO_socket_ioctl(s,FIONBIO,&l);
 270 #endif
 271                 }
 272         else
 273                 s= *sock;
 274
 275         i=connect(s,(struct sockaddr *)&them,sizeof(them));
 276         if (i == INVALID_SOCKET)
 277                 {
 278                 if (BIO_sock_should_retry(i))
 279                         return(-1);
 280                 else
 281                         return(0);
 282                 }
 283         else
 284                 return(1);
 285         }
 286
 287 int do_server(int port, int *ret, int (*cb)(), char *context)
 288         {
 289         int sock;
 290         char *name;
 291         int accept_socket;
 292         int i;
 293
 294         if (!init_server(&accept_socket,port)) return(0);
 295
 296         if (ret != NULL)
 297                 {
 298                 *ret=accept_socket;
 299                 /* return(1);*/
 300                 }
 301         for (;;)
 302                 {
 303                 if (do_accept(accept_socket,&sock,&name) == 0)
 304                         {
 305                         SHUTDOWN(accept_socket);
 306                         return(0);
 307                         }
 308                 i=(*cb)(name,sock, context);
 309                 if (name != NULL) Free(name);
 310                 SHUTDOWN2(sock);
 311                 if (i < 0)
 312                         {
 313                         SHUTDOWN2(accept_socket);
 314                         return(i);
 315                         }
 316                 }
 317         }
 318
 319 int init_server_long(int *sock, int port, char *ip)
 320         {
 321         int ret=0;
 322         struct sockaddr_in server;
 323         int s= -1,i;
 324
 325         if (!sock_init()) return(0);
 326
 327         memset((char *)&server,0,sizeof(server));
 328         server.sin_family=AF_INET;
 329         server.sin_port=htons((unsigned short)port);
 330         if (ip == NULL)
 331                 server.sin_addr.s_addr=INADDR_ANY;
 332         else
 333 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
 334 #ifndef BIT_FIELD_LIMITS
 335                 memcpy(&server.sin_addr.s_addr,ip,4);
 336 #else
 337                 memcpy(&server.sin_addr,ip,4);
 338 #endif
 339         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 340
 341         if (s == INVALID_SOCKET) goto err;
 342 #if defined SOL_SOCKET && defined SO_REUSEADDR
 343                 {
 344                 int j = 1;
 345                 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
 346                            (void *) &j, sizeof j);
 347                 }
 348 #endif
 349         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
 350                 {
 351 #ifndef WINDOWS
 352                 perror("bind");
 353 #endif
 354                 goto err;
 355                 }
 356         /* Make it 128 for linux */
 357         if (listen(s,128) == -1) goto err;
 358         i=0;
 359         *sock=s;
 360         ret=1;
 361 err:
 362         if ((ret == 0) && (s != -1))
 363                 {
 364                 SHUTDOWN(s);
 365                 }
 366         return(ret);
 367         }
 368
 369 int init_server(int *sock, int port)
 370         {
 371         return(init_server_long(sock, port, NULL));
 372         }
 373
 374 int do_accept(int acc_sock, int *sock, char **host)
 375         {
 376         int ret,i;
 377         struct hostent *h1,*h2;
 378         static struct sockaddr_in from;
 379         int len;
 380 /*      struct linger ling; */
 381
 382         if (!sock_init()) return(0);
 383
 384 #ifndef WINDOWS
 385 redoit:
 386 #endif
 387
 388         memset((char *)&from,0,sizeof(from));
 389         len=sizeof(from);
 390         /* Note: under VMS with SOCKETSHR the third parameter is currently
 391          * of type (int *) whereas under other systems it is (void *) if
 392          * you don't have a cast it will choke the compiler: if you do
 393          * have a cast then you can either go for (int *) or (void *).
 394          */
 395         ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
 396         if (ret == INVALID_SOCKET)
 397                 {
 398 #ifdef WINDOWS
 399                 i=WSAGetLastError();
 400                 BIO_printf(bio_err,"accept error %d\n",i);
 401 #else
 402                 if (errno == EINTR)
 403                         {
 404                         /*check_timeout(); */
 405                         goto redoit;
 406                         }
 407                 fprintf(stderr,"errno=%d ",errno);
 408                 perror("accept");
 409 #endif
 410                 return(0);
 411                 }
 412
 413 /*
 414         ling.l_onoff=1;
 415         ling.l_linger=0;
 416         i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
 417         if (i < 0) { perror("linger"); return(0); }
 418         i=0;
 419         i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 420         if (i < 0) { perror("keepalive"); return(0); }
 421 */
 422
 423         if (host == NULL) goto end;
 424 #ifndef BIT_FIELD_LIMITS
 425         /* I should use WSAAsyncGetHostByName() under windows */
 426         h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
 427                 sizeof(from.sin_addr.s_addr),AF_INET);
 428 #else
 429         h1=gethostbyaddr((char *)&from.sin_addr,
 430                 sizeof(struct in_addr),AF_INET);
 431 #endif
 432         if (h1 == NULL)
 433                 {
 434                 BIO_printf(bio_err,"bad gethostbyaddr\n");
 435                 *host=NULL;
 436                 /* return(0); */
 437                 }
 438         else
 439                 {
 440                 if ((*host=(char *)Malloc(strlen(h1->h_name)+1)) == NULL)
 441                         {
 442                         perror("Malloc");
 443                         return(0);
 444                         }
 445                 strcpy(*host,h1->h_name);
 446
 447                 h2=GetHostByName(*host);
 448                 if (h2 == NULL)
 449                         {
 450                         BIO_printf(bio_err,"gethostbyname failure\n");
 451                         return(0);
 452                         }
 453                 i=0;
 454                 if (h2->h_addrtype != AF_INET)
 455                         {
 456                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 457                         return(0);
 458                         }
 459                 }
 460 end:
 461         *sock=ret;
 462         return(1);
 463         }
 464
 465 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
 466              short *port_ptr)
 467         {
 468         char *h,*p;
 469
 470         h=str;
 471         p=strchr(str,':');
 472         if (p == NULL)
 473                 {
 474                 BIO_printf(bio_err,"no port defined\n");
 475                 return(0);
 476                 }
 477         *(p++)='\0';
 478
 479         if ((ip != NULL) && !host_ip(str,ip))
 480                 goto err;
 481         if (host_ptr != NULL) *host_ptr=h;
 482
 483         if (!extract_port(p,port_ptr))
 484                 goto err;
 485         return(1);
 486 err:
 487         return(0);
 488         }
 489
 490 int host_ip(char *str, unsigned char ip[4])
 491         {
 492         unsigned int in[4];
 493         int i;
 494
 495         if (sscanf(str,"%d.%d.%d.%d",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
 496                 {
 497                 for (i=0; i<4; i++)
 498                         if (in[i] > 255)
 499                                 {
 500                                 BIO_printf(bio_err,"invalid IP address\n");
 501                                 goto err;
 502                                 }
 503                 ip[0]=in[0];
 504                 ip[1]=in[1];
 505                 ip[2]=in[2];
 506                 ip[3]=in[3];
 507                 }
 508         else
 509                 { /* do a gethostbyname */
 510                 struct hostent *he;
 511
 512                 if (!sock_init()) return(0);
 513
 514                 he=GetHostByName(str);
 515                 if (he == NULL)
 516                         {
 517                         BIO_printf(bio_err,"gethostbyname failure\n");
 518                         goto err;
 519                         }
 520                 /* cast to short because of win16 winsock definition */
 521                 if ((short)he->h_addrtype != AF_INET)
 522                         {
 523                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 524                         return(0);
 525                         }
 526                 ip[0]=he->h_addr_list[0][0];
 527                 ip[1]=he->h_addr_list[0][1];
 528                 ip[2]=he->h_addr_list[0][2];
 529                 ip[3]=he->h_addr_list[0][3];
 530                 }
 531         return(1);
 532 err:
 533         return(0);
 534         }
 535
 536 int extract_port(char *str, short *port_ptr)
 537         {
 538         int i;
 539         struct servent *s;
 540
 541         i=atoi(str);
 542         if (i != 0)
 543                 *port_ptr=(unsigned short)i;
 544         else
 545                 {
 546                 s=getservbyname(str,"tcp");
 547                 if (s == NULL)
 548                         {
 549                         BIO_printf(bio_err,"getservbyname failure for %s\n",str);
 550                         return(0);
 551                         }
 552                 *port_ptr=ntohs((unsigned short)s->s_port);
 553                 }
 554         return(1);
 555         }
 556
 557 #define GHBN_NUM        4
 558 static struct ghbn_cache_st
 559         {
 560         char name[128];
 561         struct hostent ent;
 562         unsigned long order;
 563         } ghbn_cache[GHBN_NUM];
 564
 565 static unsigned long ghbn_hits=0L;
 566 static unsigned long ghbn_miss=0L;
 567
 568 static struct hostent *GetHostByName(char *name)
 569         {
 570         struct hostent *ret;
 571         int i,lowi=0;
 572         unsigned long low= (unsigned long)-1;
 573
 574         for (i=0; i<GHBN_NUM; i++)
 575                 {
 576                 if (low > ghbn_cache[i].order)
 577                         {
 578                         low=ghbn_cache[i].order;
 579                         lowi=i;
 580                         }
 581                 if (ghbn_cache[i].order > 0)
 582                         {
 583                         if (strncmp(name,ghbn_cache[i].name,128) == 0)
 584                                 break;
 585                         }
 586                 }
 587         if (i == GHBN_NUM) /* no hit*/
 588                 {
 589                 ghbn_miss++;
 590                 ret=gethostbyname(name);
 591                 if (ret == NULL) return(NULL);
 592                 /* else add to cache */
 593                 strncpy(ghbn_cache[lowi].name,name,128);
 594                 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
 595                 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
 596                 return(ret);
 597                 }
 598         else
 599                 {
 600                 ghbn_hits++;
 601                 ret= &(ghbn_cache[i].ent);
 602                 ghbn_cache[i].order=ghbn_miss+ghbn_hits;
 603                 return(ret);
 604                 }
 605         }
 606
 607 #ifndef MSDOS
 608 int spawn(int argc, char **argv, int *in, int *out)
 609         {
 610         int pid;
 611 #define CHILD_READ      p1[0]
 612 #define CHILD_WRITE     p2[1]
 613 #define PARENT_READ     p2[0]
 614 #define PARENT_WRITE    p1[1]
 615         int p1[2],p2[2];
 616
 617         if ((pipe(p1) < 0) || (pipe(p2) < 0)) return(-1);
 618
 619 #ifdef VMS
 620         if ((pid=vfork()) == 0)
 621 #else
 622         if ((pid=fork()) == 0)
 623 #endif
 624                 { /* child */
 625                 if (dup2(CHILD_WRITE,fileno(stdout)) < 0)
 626                         perror("dup2");
 627                 if (dup2(CHILD_WRITE,fileno(stderr)) < 0)
 628                         perror("dup2");
 629                 if (dup2(CHILD_READ,fileno(stdin)) < 0)
 630                         perror("dup2");
 631                 close(CHILD_READ);
 632                 close(CHILD_WRITE);
 633
 634                 close(PARENT_READ);
 635                 close(PARENT_WRITE);
 636                 execvp(argv[0],argv);
 637                 perror("child");
 638                 exit(1);
 639                 }
 640
 641         /* parent */
 642         *in= PARENT_READ;
 643         *out=PARENT_WRITE;
 644         close(CHILD_READ);
 645         close(CHILD_WRITE);
 646         return(pid);
 647         }
 648 #endif /* MSDOS */
 649
 650
 651 #ifdef undef
 652         /* Turn on synchronous sockets so that we can do a WaitForMultipleObjects
 653          * on sockets */
 654         {
 655         SOCKET s;
 656         int optionValue = SO_SYNCHRONOUS_NONALERT;
 657         int err;
 658
 659         err = setsockopt(
 660             INVALID_SOCKET,
 661             SOL_SOCKET,
 662             SO_OPENTYPE,
 663             (char *)&optionValue,
 664             sizeof(optionValue));
 665         if (err != NO_ERROR) {
 666         /* failed for some reason... */
 667                 BIO_printf(bio_err, "failed to setsockopt(SO_OPENTYPE, SO_SYNCHRONOUS_ALERT) - %d\n",
 668                         WSAGetLastError());
 669                 }
 670         }
 671 #endif