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 #ifdef FLAT_INC
  66 #include "e_os2.h"
  67 #else
  68 #include "../e_os2.h"
  69 #endif
  70
  71 /* With IPv6, it looks like Digital has mixed up the proper order of
  72    recursive header file inclusion, resulting in the compiler complaining
  73    that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
  74    is needed to have fileno() declared correctly...  So let's define u_int */
  75 #if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
  76 #define __U_INT
  77 typedef unsigned int u_int;
  78 #endif
  79
  80 #define USE_SOCKETS
  81 #define NON_MAIN
  82 #include "apps.h"
  83 #undef USE_SOCKETS
  84 #undef NON_MAIN
  85 #include "s_apps.h"
  86 #include <openssl/ssl.h>
  87
  88 #ifdef FLAT_INC
  89 #include "e_os.h"
  90 #else
  91 #include "../e_os.h"
  92 #endif
  93
  94 #ifndef OPENSSL_NO_SOCK
  95
  96 #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK)
  97 #include "netdb.h"
  98 #endif
  99
 100 static struct hostent *GetHostByName(char *name);
 101 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
 102 static void ssl_sock_cleanup(void);
 103 #endif
 104 static int ssl_sock_init(void);
 105 static int init_client_ip(int *sock,unsigned char ip[4], int port, int type);
 106 static int init_server(int *sock, int port, int type);
 107 static int init_server_long(int *sock, int port,char *ip, int type);
 108 static int do_accept(int acc_sock, int *sock, char **host);
 109 static int host_ip(char *str, unsigned char ip[4]);
 110
 111 #ifdef OPENSSL_SYS_WIN16
 112 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
 113 #else
 114 #define SOCKET_PROTOCOL IPPROTO_TCP
 115 #endif
 116
 117 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
 118 static int wsa_init_done=0;
 119 #endif
 120
 121 #ifdef OPENSSL_SYS_WINDOWS
 122 static struct WSAData wsa_state;
 123 static int wsa_init_done=0;
 124
 125 #ifdef OPENSSL_SYS_WIN16
 126 static HWND topWnd=0;
 127 static FARPROC lpTopWndProc=NULL;
 128 static FARPROC lpTopHookProc=NULL;
 129 extern HINSTANCE _hInstance;  /* nice global CRT provides */
 130
 131 static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam,
 132              LPARAM lParam)
 133         {
 134         if (hwnd == topWnd)
 135                 {
 136                 switch(message)
 137                         {
 138                 case WM_DESTROY:
 139                 case WM_CLOSE:
 140                         SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc);
 141                         ssl_sock_cleanup();
 142                         break;
 143                         }
 144                 }
 145         return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam);
 146         }
 147
 148 static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam)
 149         {
 150         topWnd=hwnd;
 151         return(FALSE);
 152         }
 153
 154 #endif /* OPENSSL_SYS_WIN32 */
 155 #endif /* OPENSSL_SYS_WINDOWS */
 156
 157 #ifdef OPENSSL_SYS_WINDOWS
 158 static void ssl_sock_cleanup(void)
 159         {
 160         if (wsa_init_done)
 161                 {
 162                 wsa_init_done=0;
 163 #ifndef OPENSSL_SYS_WINCE
 164                 WSACancelBlockingCall();
 165 #endif
 166                 WSACleanup();
 167                 }
 168         }
 169 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
 170 static void sock_cleanup(void)
 171     {
 172     if (wsa_init_done)
 173         {
 174         wsa_init_done=0;
 175                 WSACleanup();
 176                 }
 177         }
 178 #endif
 179
 180 static int ssl_sock_init(void)
 181         {
 182 #ifdef WATT32
 183         extern int _watt_do_exit;
 184         _watt_do_exit = 0;
 185         if (sock_init())
 186                 return (0);
 187 #elif defined(OPENSSL_SYS_WINDOWS)
 188         if (!wsa_init_done)
 189                 {
 190                 int err;
 191
 192 #ifdef SIGINT
 193                 signal(SIGINT,(void (*)(int))ssl_sock_cleanup);
 194 #endif
 195                 wsa_init_done=1;
 196                 memset(&wsa_state,0,sizeof(wsa_state));
 197                 if (WSAStartup(0x0101,&wsa_state)!=0)
 198                         {
 199                         err=WSAGetLastError();
 200                         BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
 201                         return(0);
 202                         }
 203
 204 #ifdef OPENSSL_SYS_WIN16
 205                 EnumTaskWindows(GetCurrentTask(),enumproc,0L);
 206                 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
 207                 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
 208
 209                 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
 210 #endif /* OPENSSL_SYS_WIN16 */
 211                 }
 212 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
 213    WORD wVerReq;
 214    WSADATA wsaData;
 215    int err;
 216
 217    if (!wsa_init_done)
 218       {
 219
 220 # ifdef SIGINT
 221       signal(SIGINT,(void (*)(int))sock_cleanup);
 222 # endif
 223
 224       wsa_init_done=1;
 225       wVerReq = MAKEWORD( 2, 0 );
 226       err = WSAStartup(wVerReq,&wsaData);
 227       if (err != 0)
 228          {
 229          BIO_printf(bio_err,"unable to start WINSOCK2, error code=%d\n",err);
 230          return(0);
 231          }
 232       }
 233 #endif /* OPENSSL_SYS_WINDOWS */
 234         return(1);
 235         }
 236
 237 int init_client(int *sock, char *host, int port, int type)
 238         {
 239         unsigned char ip[4];
 240
 241         memset(ip, '\0', sizeof ip);
 242         if (!host_ip(host,&(ip[0])))
 243                 return 0;
 244         return init_client_ip(sock,ip,port,type);
 245         }
 246
 247 static int init_client_ip(int *sock, unsigned char ip[4], int port, int type)
 248         {
 249         unsigned long addr;
 250         struct sockaddr_in them;
 251         int s,i;
 252
 253         if (!ssl_sock_init()) return(0);
 254
 255         memset((char *)&them,0,sizeof(them));
 256         them.sin_family=AF_INET;
 257         them.sin_port=htons((unsigned short)port);
 258         addr=(unsigned long)
 259                 ((unsigned long)ip[0]<<24L)|
 260                 ((unsigned long)ip[1]<<16L)|
 261                 ((unsigned long)ip[2]<< 8L)|
 262                 ((unsigned long)ip[3]);
 263         them.sin_addr.s_addr=htonl(addr);
 264
 265         if (type == SOCK_STREAM)
 266                 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 267         else /* ( type == SOCK_DGRAM) */
 268                 s=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
 269
 270         if (s == INVALID_SOCKET) { perror("socket"); return(0); }
 271
 272 #if defined(SO_KEEPALIVE) && !defined(OPENSSL_SYS_MPE)
 273         if (type == SOCK_STREAM)
 274                 {
 275                 i=0;
 276                 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 277                 if (i < 0) { perror("keepalive"); return(0); }
 278                 }
 279 #endif
 280
 281         if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
 282                 { closesocket(s); perror("connect"); return(0); }
 283         *sock=s;
 284         return(1);
 285         }
 286
 287 int do_server(int port, int type, int *ret, int (*cb)(char *hostname, int s, unsigned char *context), unsigned char *context)
 288         {
 289         int sock;
 290         char *name = NULL;
 291         int accept_socket = 0;
 292         int i;
 293
 294         if (!init_server(&accept_socket,port,type)) return(0);
 295
 296         if (ret != NULL)
 297                 {
 298                 *ret=accept_socket;
 299                 /* return(1);*/
 300                 }
 301         for (;;)
 302                 {
 303                 if (type==SOCK_STREAM)
 304                         {
 305                         if (do_accept(accept_socket,&sock,&name) == 0)
 306                                 {
 307                                 SHUTDOWN(accept_socket);
 308                                 return(0);
 309                                 }
 310                         }
 311                 else
 312                         sock = accept_socket;
 313                 i=(*cb)(name,sock, context);
 314                 if (name != NULL) OPENSSL_free(name);
 315                 if (type==SOCK_STREAM)
 316                         SHUTDOWN2(sock);
 317                 if (i < 0)
 318                         {
 319                         SHUTDOWN2(accept_socket);
 320                         return(i);
 321                         }
 322                 }
 323         }
 324
 325 static int init_server_long(int *sock, int port, char *ip, int type)
 326         {
 327         int ret=0;
 328         struct sockaddr_in server;
 329         int s= -1;
 330
 331         if (!ssl_sock_init()) return(0);
 332
 333         memset((char *)&server,0,sizeof(server));
 334         server.sin_family=AF_INET;
 335         server.sin_port=htons((unsigned short)port);
 336         if (ip == NULL)
 337                 server.sin_addr.s_addr=INADDR_ANY;
 338         else
 339 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
 340 #ifndef BIT_FIELD_LIMITS
 341                 memcpy(&server.sin_addr.s_addr,ip,4);
 342 #else
 343                 memcpy(&server.sin_addr,ip,4);
 344 #endif
 345
 346                 if (type == SOCK_STREAM)
 347                         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 348                 else /* type == SOCK_DGRAM */
 349                         s=socket(AF_INET, SOCK_DGRAM,IPPROTO_UDP);
 350
 351         if (s == INVALID_SOCKET) goto err;
 352 #if defined SOL_SOCKET && defined SO_REUSEADDR
 353                 {
 354                 int j = 1;
 355                 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
 356                            (void *) &j, sizeof j);
 357                 }
 358 #endif
 359         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
 360                 {
 361 #ifndef OPENSSL_SYS_WINDOWS
 362                 perror("bind");
 363 #endif
 364                 goto err;
 365                 }
 366         /* Make it 128 for linux */
 367         if (type==SOCK_STREAM && listen(s,128) == -1) goto err;
 368         *sock=s;
 369         ret=1;
 370 err:
 371         if ((ret == 0) && (s != -1))
 372                 {
 373                 SHUTDOWN(s);
 374                 }
 375         return(ret);
 376         }
 377
 378 static int init_server(int *sock, int port, int type)
 379         {
 380         return(init_server_long(sock, port, NULL, type));
 381         }
 382
 383 static int do_accept(int acc_sock, int *sock, char **host)
 384         {
 385         int ret;
 386         struct hostent *h1,*h2;
 387         static struct sockaddr_in from;
 388         int len;
 389 /*      struct linger ling; */
 390
 391         if (!ssl_sock_init()) return(0);
 392
 393 #ifndef OPENSSL_SYS_WINDOWS
 394 redoit:
 395 #endif
 396
 397         memset((char *)&from,0,sizeof(from));
 398         len=sizeof(from);
 399         /* Note: under VMS with SOCKETSHR the fourth parameter is currently
 400          * of type (int *) whereas under other systems it is (void *) if
 401          * you don't have a cast it will choke the compiler: if you do
 402          * have a cast then you can either go for (int *) or (void *).
 403          */
 404         ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
 405         if (ret == INVALID_SOCKET)
 406                 {
 407 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
 408                 int i;
 409                 i=WSAGetLastError();
 410                 BIO_printf(bio_err,"accept error %d\n",i);
 411 #else
 412                 if (errno == EINTR)
 413                         {
 414                         /*check_timeout(); */
 415                         goto redoit;
 416                         }
 417                 fprintf(stderr,"errno=%d ",errno);
 418                 perror("accept");
 419 #endif
 420                 return(0);
 421                 }
 422
 423 /*
 424         ling.l_onoff=1;
 425         ling.l_linger=0;
 426         i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
 427         if (i < 0) { perror("linger"); return(0); }
 428         i=0;
 429         i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 430         if (i < 0) { perror("keepalive"); return(0); }
 431 */
 432
 433         if (host == NULL) goto end;
 434 #ifndef BIT_FIELD_LIMITS
 435         /* I should use WSAAsyncGetHostByName() under windows */
 436         h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
 437                 sizeof(from.sin_addr.s_addr),AF_INET);
 438 #else
 439         h1=gethostbyaddr((char *)&from.sin_addr,
 440                 sizeof(struct in_addr),AF_INET);
 441 #endif
 442         if (h1 == NULL)
 443                 {
 444                 BIO_printf(bio_err,"bad gethostbyaddr\n");
 445                 *host=NULL;
 446                 /* return(0); */
 447                 }
 448         else
 449                 {
 450                 if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL)
 451                         {
 452                         perror("OPENSSL_malloc");
 453                         return(0);
 454                         }
 455                 BUF_strlcpy(*host,h1->h_name,strlen(h1->h_name)+1);
 456
 457                 h2=GetHostByName(*host);
 458                 if (h2 == NULL)
 459                         {
 460                         BIO_printf(bio_err,"gethostbyname failure\n");
 461                         return(0);
 462                         }
 463                 if (h2->h_addrtype != AF_INET)
 464                         {
 465                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 466                         return(0);
 467                         }
 468                 }
 469 end:
 470         *sock=ret;
 471         return(1);
 472         }
 473
 474 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
 475              short *port_ptr)
 476         {
 477         char *h,*p;
 478
 479         h=str;
 480         p=strchr(str,':');
 481         if (p == NULL)
 482                 {
 483                 BIO_printf(bio_err,"no port defined\n");
 484                 return(0);
 485                 }
 486         *(p++)='\0';
 487
 488         if ((ip != NULL) && !host_ip(str,ip))
 489                 goto err;
 490         if (host_ptr != NULL) *host_ptr=h;
 491
 492         if (!extract_port(p,port_ptr))
 493                 goto err;
 494         return(1);
 495 err:
 496         return(0);
 497         }
 498
 499 static int host_ip(char *str, unsigned char ip[4])
 500         {
 501         unsigned int in[4];
 502         int i;
 503
 504         if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
 505                 {
 506                 for (i=0; i<4; i++)
 507                         if (in[i] > 255)
 508                                 {
 509                                 BIO_printf(bio_err,"invalid IP address\n");
 510                                 goto err;
 511                                 }
 512                 ip[0]=in[0];
 513                 ip[1]=in[1];
 514                 ip[2]=in[2];
 515                 ip[3]=in[3];
 516                 }
 517         else
 518                 { /* do a gethostbyname */
 519                 struct hostent *he;
 520
 521                 if (!ssl_sock_init()) return(0);
 522
 523                 he=GetHostByName(str);
 524                 if (he == NULL)
 525                         {
 526                         BIO_printf(bio_err,"gethostbyname failure\n");
 527                         goto err;
 528                         }
 529                 /* cast to short because of win16 winsock definition */
 530                 if ((short)he->h_addrtype != AF_INET)
 531                         {
 532                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
 533                         return(0);
 534                         }
 535                 ip[0]=he->h_addr_list[0][0];
 536                 ip[1]=he->h_addr_list[0][1];
 537                 ip[2]=he->h_addr_list[0][2];
 538                 ip[3]=he->h_addr_list[0][3];
 539                 }
 540         return(1);
 541 err:
 542         return(0);
 543         }
 544
 545 int extract_port(char *str, short *port_ptr)
 546         {
 547         int i;
 548         struct servent *s;
 549
 550         i=atoi(str);
 551         if (i != 0)
 552                 *port_ptr=(unsigned short)i;
 553         else
 554                 {
 555                 s=getservbyname(str,"tcp");
 556                 if (s == NULL)
 557                         {
 558                         BIO_printf(bio_err,"getservbyname failure for %s\n",str);
 559                         return(0);
 560                         }
 561                 *port_ptr=ntohs((unsigned short)s->s_port);
 562                 }
 563         return(1);
 564         }
 565
 566 #define GHBN_NUM        4
 567 static struct ghbn_cache_st
 568         {
 569         char name[128];
 570         struct hostent ent;
 571         unsigned long order;
 572         } ghbn_cache[GHBN_NUM];
 573
 574 static unsigned long ghbn_hits=0L;
 575 static unsigned long ghbn_miss=0L;
 576
 577 static struct hostent *GetHostByName(char *name)
 578         {
 579         struct hostent *ret;
 580         int i,lowi=0;
 581         unsigned long low= (unsigned long)-1;
 582
 583         for (i=0; i<GHBN_NUM; i++)
 584                 {
 585                 if (low > ghbn_cache[i].order)
 586                         {
 587                         low=ghbn_cache[i].order;
 588                         lowi=i;
 589                         }
 590                 if (ghbn_cache[i].order > 0)
 591                         {
 592                         if (strncmp(name,ghbn_cache[i].name,128) == 0)
 593                                 break;
 594                         }
 595                 }
 596         if (i == GHBN_NUM) /* no hit*/
 597                 {
 598                 ghbn_miss++;
 599                 ret=gethostbyname(name);
 600                 if (ret == NULL) return(NULL);
 601                 /* else add to cache */
 602                 if(strlen(name) < sizeof ghbn_cache[0].name)
 603                         {
 604                         strcpy(ghbn_cache[lowi].name,name);
 605                         memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
 606                         ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
 607                         }
 608                 return(ret);
 609                 }
 610         else
 611                 {
 612                 ghbn_hits++;
 613                 ret= &(ghbn_cache[i].ent);
 614                 ghbn_cache[i].order=ghbn_miss+ghbn_hits;
 615                 return(ret);
 616                 }
 617         }
 618
 619 #endif