apps/s_socket.c

   1 /* apps/s_socket.c -  socket-related functions used by s_client and s_server */
   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(OPENSSL_SYS_VMS_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 FLAT_INC
  83 #include "e_os.h"
  84 #else
  85 #include "../e_os.h"
  86 #endif
  87
  88 #ifndef OPENSSL_NO_SOCK
  89
  90 #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK)
  91 #include "netdb.h"
  92 #endif
  93
  94 static struct hostent *GetHostByName(char *name);
  95 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
  96 static void ssl_sock_cleanup(void);
  97 #endif
  98 static int ssl_sock_init(void);
  99 static int init_client_ip(int *sock,unsigned char ip[4], int port, int type);
 100 static int init_server(int *sock, int port, int type);
 101 static int init_server_long(int *sock, int port,char *ip, int type);
 102 static int do_accept(int acc_sock, int *sock, char **host);
 103 static int host_ip(char *str, unsigned char ip[4]);
 104
 105 #ifdef OPENSSL_SYS_WIN16
 106 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
 107 #else
 108 #define SOCKET_PROTOCOL IPPROTO_TCP
 109 #endif
 110
 111 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
 112 static int wsa_init_done=0;
 113 #endif
 114
 115 #ifdef OPENSSL_SYS_WINDOWS
 116 static struct WSAData wsa_state;
 117 static int wsa_init_done=0;
 118
 119 #ifdef OPENSSL_SYS_WIN16
 120 static HWND topWnd=0;
 121 static FARPROC lpTopWndProc=NULL;
 122 static FARPROC lpTopHookProc=NULL;
 123 extern HINSTANCE _hInstance;  /* nice global CRT provides */
 124
 125 static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam,
 126              LPARAM lParam)
 127         {
 128         if (hwnd == topWnd)
 129                 {
 130                 switch(message)
 131                         {
 132                 case WM_DESTROY:
 133                 case WM_CLOSE:
 134                         SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc);
 135                         ssl_sock_cleanup();
 136                         break;
 137                         }
 138                 }
 139         return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam);
 140         }
 141
 142 static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam)
 143         {
 144         topWnd=hwnd;
 145         return(FALSE);
 146         }
 147
 148 #endif /* OPENSSL_SYS_WIN32 */
 149 #endif /* OPENSSL_SYS_WINDOWS */
 150
 151 #ifdef OPENSSL_SYS_WINDOWS
 152 static void ssl_sock_cleanup(void)
 153         {
 154         if (wsa_init_done)
 155                 {
 156                 wsa_init_done=0;
 157 #ifndef OPENSSL_SYS_WINCE
 158                 WSACancelBlockingCall();
 159 #endif
 160                 WSACleanup();
 161                 }
 162         }
 163 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
 164 static void sock_cleanup(void)
 165     {
 166     if (wsa_init_done)
 167         {
 168         wsa_init_done=0;
 169                 WSACleanup();
 170                 }
 171         }
 172 #endif
 173
 174 static int ssl_sock_init(void)
 175         {
 176 #ifdef WATT32
 177         extern int _watt_do_exit;
 178         _watt_do_exit = 0;
 179         if (sock_init())
 180                 return (0);
 181 #elif defined(OPENSSL_SYS_WINDOWS)
 182         if (!wsa_init_done)
 183                 {
 184                 int err;
 185
 186 #ifdef SIGINT
 187                 signal(SIGINT,(void (*)(int))ssl_sock_cleanup);
 188 #endif
 189                 wsa_init_done=1;
 190                 memset(&wsa_state,0,sizeof(wsa_state));
 191                 if (WSAStartup(0x0101,&wsa_state)!=0)
 192                         {
 193                         err=WSAGetLastError();
 194                         BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
 195                         return(0);
 196                         }
 197
 198 #ifdef OPENSSL_SYS_WIN16
 199                 EnumTaskWindows(GetCurrentTask(),enumproc,0L);
 200                 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
 201                 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
 202
 203                 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
 204 #endif /* OPENSSL_SYS_WIN16 */
 205                 }
 206 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
 207    WORD wVerReq;
 208    WSADATA wsaData;
 209    int err;
 210
 211    if (!wsa_init_done)
 212       {
 213
 214 # ifdef SIGINT
 215       signal(SIGINT,(void (*)(int))sock_cleanup);
 216 # endif
 217
 218       wsa_init_done=1;
 219       wVerReq = MAKEWORD( 2, 0 );
 220       err = WSAStartup(wVerReq,&wsaData);
 221       if (err != 0)
 222          {
 223          BIO_printf(bio_err,"unable to start WINSOCK2, error code=%d\n",err);
 224          return(0);
 225          }
 226       }
 227 #endif /* OPENSSL_SYS_WINDOWS */
 228         return(1);
 229         }
 230
 231 int init_client(int *sock, char *host, int port, int type)
 232         {
 233         unsigned char ip[4];
 234
 235         if (!host_ip(host,&(ip[0])))
 236                 {
 237                 return(0);
 238                 }
 239         return(init_client_ip(sock,ip,port,type));
 240         }
 241
 242 static int init_client_ip(int *sock, unsigned char ip[4], int port, int type)
 243         {
 244         unsigned long addr;
 245         struct sockaddr_in them;
 246         int s,i;
 247
 248         if (!ssl_sock_init()) return(0);
 249
 250         memset((char *)&them,0,sizeof(them));
 251         them.sin_family=AF_INET;
 252         them.sin_port=htons((unsigned short)port);
 253         addr=(unsigned long)
 254                 ((unsigned long)ip[0]<<24L)|
 255                 ((unsigned long)ip[1]<<16L)|
 256                 ((unsigned long)ip[2]<< 8L)|
 257                 ((unsigned long)ip[3]);
 258         them.sin_addr.s_addr=htonl(addr);
 259
 260         if (type == SOCK_STREAM)
 261                 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 262         else /* ( type == SOCK_DGRAM) */
 263                 s=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
 264
 265         if (s == INVALID_SOCKET) { perror("socket"); return(0); }
 266
 267 #if defined(SO_KEEPALIVE) && !defined(OPENSSL_SYS_MPE)
 268         if (type == SOCK_STREAM)
 269                 {
 270                 i=0;
 271                 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 272                 if (i < 0) { perror("keepalive"); return(0); }
 273                 }
 274 #endif
 275
 276         if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
 277                 { closesocket(s); perror("connect"); return(0); }
 278         *sock=s;
 279         return(1);
 280         }
 281
 282 int do_server(int port, int type, int *ret, int (*cb)(char *hostname, int s, unsigned char *context), unsigned char *context)
 283         {
 284         int sock;
 285         char *name = NULL;
 286         int accept_socket;
 287         int i;
 288
 289         if (!init_server(&accept_socket,port,type)) return(0);
 290
 291         if (ret != NULL)
 292                 {
 293                 *ret=accept_socket;
 294                 /* return(1);*/
 295                 }
 296         for (;;)
 297                 {
 298                 if (type==SOCK_STREAM)
 299                         {
 300                         if (do_accept(accept_socket,&sock,&name) == 0)
 301                                 {
 302                                 SHUTDOWN(accept_socket);
 303                                 return(0);
 304                                 }
 305                         }
 306                 else
 307                         sock = accept_socket;
 308                 i=(*cb)(name,sock, context);
 309                 if (name != NULL) OPENSSL_free(name);
 310                 if (type==SOCK_STREAM)
 311                         SHUTDOWN2(sock);
 312                 if (i < 0)
 313                         {
 314                         SHUTDOWN2(accept_socket);
 315                         return(i);
 316                         }
 317                 }
 318         }
 319
 320 static int init_server_long(int *sock, int port, char *ip, int type)
 321         {
 322         int ret=0;
 323         struct sockaddr_in server;
 324         int s= -1,i;
 325
 326         if (!ssl_sock_init()) return(0);
 327
 328         memset((char *)&server,0,sizeof(server));
 329         server.sin_family=AF_INET;
 330         server.sin_port=htons((unsigned short)port);
 331         if (ip == NULL)
 332                 server.sin_addr.s_addr=INADDR_ANY;
 333         else
 334 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
 335 #ifndef BIT_FIELD_LIMITS
 336                 memcpy(&server.sin_addr.s_addr,ip,4);
 337 #else
 338                 memcpy(&server.sin_addr,ip,4);
 339 #endif
 340
 341                 if (type == SOCK_STREAM)
 342                         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 343                 else /* type == SOCK_DGRAM */
 344                         s=socket(AF_INET, SOCK_DGRAM,IPPROTO_UDP);
 345
 346         if (s == INVALID_SOCKET) goto err;
 347 #if defined SOL_SOCKET && defined SO_REUSEADDR
 348                 {
 349                 int j = 1;
 350                 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
 351                            (void *) &j, sizeof j);
 352                 }
 353 #endif
 354         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
 355                 {
 356 #ifndef OPENSSL_SYS_WINDOWS
 357                 perror("bind");
 358 #endif
 359                 goto err;
 360                 }
 361         /* Make it 128 for linux */
 362         if (type==SOCK_STREAM && listen(s,128) == -1) goto err;
 363         i=0;
 364         *sock=s;
 365         ret=1;
 366 err:
 367         if ((ret == 0) && (s != -1))
 368                 {
 369                 SHUTDOWN(s);
 370                 }
 371         return(ret);
 372         }
 373
 374 static int init_server(int *sock, int port, int type)
 375         {
 376         return(init_server_long(sock, port, NULL, type));
 377         }
 378
 379 static int do_accept(int acc_sock, int *sock, char **host)
 380         {
 381         int ret,i;
 382         struct hostent *h1,*h2;
 383         static struct sockaddr_in from;
 384         int len;
 385 /*      struct linger ling; */
 386
 387         if (!ssl_sock_init()) return(0);
 388
 389 #ifndef OPENSSL_SYS_WINDOWS
 390 redoit:
 391 #endif
 392
 393         memset((char *)&from,0,sizeof(from));
 394         len=sizeof(from);
 395         /* Note: under VMS with SOCKETSHR the fourth parameter is currently
 396          * of type (int *) whereas under other systems it is (void *) if
 397          * you don't have a cast it will choke the compiler: if you do
 398          * have a cast then you can either go for (int *) or (void *).
 399          */
 400         ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
 401         if (ret == INVALID_SOCKET)
 402                 {
 403 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
 404                 i=WSAGetLastError();
 405                 BIO_printf(bio_err,"accept error %d\n",i);
 406 #else
 407                 if (errno == EINTR)
 408                         {
 409                         /*check_timeout(); */
 410                         goto redoit;
 411                         }
 412                 fprintf(stderr,"errno=%d ",errno);
 413                 perror("accept");
 414 #endif
 415                 return(0);
 416                 }
 417
 418 /*
 419         ling.l_onoff=1;
 420         ling.l_linger=0;
 421         i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
 422         if (i < 0) { perror("linger"); return(0); }
 423         i=0;
 424         i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 425         if (i < 0) { perror("keepalive"); return(0); }
 426 */
 427
 428         if (host == NULL) goto end;
 429 #ifndef BIT_FIELD_LIMITS
 430         /* I should use WSAAsyncGetHostByName() under windows */
 431         h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
 432                 sizeof(from.sin_addr.s_addr),AF_INET);
 433 #else
 434         h1=gethostbyaddr((char *)&from.sin_addr,
 435                 sizeof(struct in_addr),AF_INET);
 436 #endif
 437         if (h1 == NULL)
 438                 {
 439                 BIO_printf(bio_err,"bad gethostbyaddr\n");
 440                 *host=NULL;
 441                 /* return(0); */
 442                 }
 443         else
 444                 {
 445                 if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL)
 446                         {
 447                         perror("OPENSSL_malloc");
 448                         return(0);
 449                         }
 450                 BUF_strlcpy(*host,h1->h_name,strlen(h1->h_name)+1);
 451
 452                 h2=GetHostByName(*host);
 453                 if (h2 == NULL)
 454                         {
 455                         BIO_printf(bio_err,"gethostbyname failure\n");
 456                         return(0);
 457                         }
 458                 i=0;
 459                 if (h2->h_addrtype != AF_INET)
 460                         {
 461                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 462                         return(0);
 463                         }
 464                 }
 465 end:
 466         *sock=ret;
 467         return(1);
 468         }
 469
 470 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
 471              short *port_ptr)
 472         {
 473         char *h,*p;
 474
 475         h=str;
 476         p=strchr(str,':');
 477         if (p == NULL)
 478                 {
 479                 BIO_printf(bio_err,"no port defined\n");
 480                 return(0);
 481                 }
 482         *(p++)='\0';
 483
 484         if ((ip != NULL) && !host_ip(str,ip))
 485                 goto err;
 486         if (host_ptr != NULL) *host_ptr=h;
 487
 488         if (!extract_port(p,port_ptr))
 489                 goto err;
 490         return(1);
 491 err:
 492         return(0);
 493         }
 494
 495 static int host_ip(char *str, unsigned char ip[4])
 496         {
 497         unsigned int in[4];
 498         int i;
 499
 500         if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
 501                 {
 502                 for (i=0; i<4; i++)
 503                         if (in[i] > 255)
 504                                 {
 505                                 BIO_printf(bio_err,"invalid IP address\n");
 506                                 goto err;
 507                                 }
 508                 ip[0]=in[0];
 509                 ip[1]=in[1];
 510                 ip[2]=in[2];
 511                 ip[3]=in[3];
 512                 }
 513         else
 514                 { /* do a gethostbyname */
 515                 struct hostent *he;
 516
 517                 if (!ssl_sock_init()) return(0);
 518
 519                 he=GetHostByName(str);
 520                 if (he == NULL)
 521                         {
 522                         BIO_printf(bio_err,"gethostbyname failure\n");
 523                         goto err;
 524                         }
 525                 /* cast to short because of win16 winsock definition */
 526                 if ((short)he->h_addrtype != AF_INET)
 527                         {
 528                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 529                         return(0);
 530                         }
 531                 ip[0]=he->h_addr_list[0][0];
 532                 ip[1]=he->h_addr_list[0][1];
 533                 ip[2]=he->h_addr_list[0][2];
 534                 ip[3]=he->h_addr_list[0][3];
 535                 }
 536         return(1);
 537 err:
 538         return(0);
 539         }
 540
 541 int extract_port(char *str, short *port_ptr)
 542         {
 543         int i;
 544         struct servent *s;
 545
 546         i=atoi(str);
 547         if (i != 0)
 548                 *port_ptr=(unsigned short)i;
 549         else
 550                 {
 551                 s=getservbyname(str,"tcp");
 552                 if (s == NULL)
 553                         {
 554                         BIO_printf(bio_err,"getservbyname failure for %s\n",str);
 555                         return(0);
 556                         }
 557                 *port_ptr=ntohs((unsigned short)s->s_port);
 558                 }
 559         return(1);
 560         }
 561
 562 #define GHBN_NUM        4
 563 static struct ghbn_cache_st
 564         {
 565         char name[128];
 566         struct hostent ent;
 567         unsigned long order;
 568         } ghbn_cache[GHBN_NUM];
 569
 570 static unsigned long ghbn_hits=0L;
 571 static unsigned long ghbn_miss=0L;
 572
 573 static struct hostent *GetHostByName(char *name)
 574         {
 575         struct hostent *ret;
 576         int i,lowi=0;
 577         unsigned long low= (unsigned long)-1;
 578
 579         for (i=0; i<GHBN_NUM; i++)
 580                 {
 581                 if (low > ghbn_cache[i].order)
 582                         {
 583                         low=ghbn_cache[i].order;
 584                         lowi=i;
 585                         }
 586                 if (ghbn_cache[i].order > 0)
 587                         {
 588                         if (strncmp(name,ghbn_cache[i].name,128) == 0)
 589                                 break;
 590                         }
 591                 }
 592         if (i == GHBN_NUM) /* no hit*/
 593                 {
 594                 ghbn_miss++;
 595                 ret=gethostbyname(name);
 596                 if (ret == NULL) return(NULL);
 597                 /* else add to cache */
 598                 if(strlen(name) < sizeof ghbn_cache[0].name)
 599                         {
 600                         strcpy(ghbn_cache[lowi].name,name);
 601                         memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
 602                         ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
 603                         }
 604                 return(ret);
 605                 }
 606         else
 607                 {
 608                 ghbn_hits++;
 609                 ret= &(ghbn_cache[i].ent);
 610                 ghbn_cache[i].order=ghbn_miss+ghbn_hits;
 611                 return(ret);
 612                 }
 613         }
 614
 615 #endif