main/ipx_drv.c

   1 /*
   2 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
   3 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
   4 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
   5 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
   6 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
   7 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
   8 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
   9 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
  10 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
  11 COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  12 */
  13
  14 /*
  15  * $Source: /cvs/cvsroot/d2x/main/ipx_drv.c,v $
  16  * $Revision: 1.2 $
  17  * $Author: bradleyb $
  18  * $Date: 2001-10-19 04:10:27 $
  19  *
  20  * FIXME: put description here
  21  *
  22  * $Log: not supported by cvs2svn $
  23  *
  24  */
  25
  26 #ifdef HAVE_CONFIG_H
  27 #include <conf.h>
  28 #endif
  29
  30 #include <stdlib.h>
  31 #include <stdio.h>
  32 #include <string.h>
  33 #include <sys/types.h>
  34 #include <sys/time.h>
  35
  36 #include "pstypes.h"
  37 #include "config.h"
  38 #include "args.h"
  39 #include "text.h"
  40
  41 #include "network.h"
  42 #include "mono.h"
  43
  44 #include "ipx.h"
  45 #include "ipx_drv.h"
  46 //added 05/17/99 Matt Mueller - needed to redefine FD_* so that no asm is used
  47 #include "checker.h"
  48 //end addition -MM
  49 #define MAX_IPX_DATA 576
  50
  51 ubyte broadcast_addr[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
  52 ubyte null_addr[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
  53
  54 //int ipx_fd;
  55 //ipx_socket_t ipx_socket_data;
  56 ubyte ipx_installed=0;
  57 ubyte ipx_atexit_installed=0;
  58 //ushort ipx_socket = 0;
  59 u_int32_t ipx_network = 0;
  60 ubyte ipx_MyAddress[10];
  61 int ipx_packetnum = 0;                  /* Sequence number */
  62
  63 /* User defined routing stuff */
  64 typedef struct user_address {
  65         ubyte network[4];
  66         ubyte node[6];
  67         ubyte address[6];
  68 } user_address;
  69 #define MAX_USERS 64
  70 int Ipx_num_users = 0;
  71 user_address Ipx_users[MAX_USERS];
  72
  73 #define MAX_NETWORKS 64
  74 int Ipx_num_networks = 0;
  75 uint Ipx_networks[MAX_NETWORKS];
  76
  77 void ipx_close(void);
  78
  79 int ipx_general_PacketReady(int fd) {
  80         fd_set set;
  81         struct timeval tv;
  82
  83         FD_ZERO(&set);
  84         FD_SET(fd, &set);
  85         tv.tv_sec = tv.tv_usec = 0;
  86         if (select(fd + 1, &set, NULL, NULL, &tv) > 0)
  87                 return 1;
  88         else
  89                 return 0;
  90 }
  91
  92 struct ipx_driver *driver = NULL;
  93
  94 ubyte * ipx_get_my_server_address()
  95 {
  96         return (ubyte *)&ipx_network;
  97 }
  98
  99 ubyte * ipx_get_my_local_address()
 100 {
 101         return (ubyte *)(ipx_MyAddress + 4);
 102 }
 103
 104 //---------------------------------------------------------------
 105 // Initializes all IPX internals.
 106 // If socket_number==0, then opens next available socket.
 107 // Returns:     0  if successful.
 108 //                              -1 if socket already open.
 109 //                              -2      if socket table full.
 110 //                              -3 if IPX not installed.
 111 //                              -4 if couldn't allocate low dos memory
 112 //                              -5 if error with getting internetwork address
 113 int ipx_init( int socket_number )
 114 {
 115         int i;
 116         if (!driver) return -1;
 117         memset(ipx_MyAddress,0,10);
 118         if ((i = FindArg("-ipxnetwork")) && Args[i + 1]) {
 119                 unsigned long n = strtol(Args[i + 1], NULL, 16);
 120                 ipx_MyAddress[0] = n >> 24; ipx_MyAddress[1] = (n >> 16) & 255;
 121                 ipx_MyAddress[2] = (n >> 8) & 255; ipx_MyAddress[3] = n & 255;
 122                 printf("IPX: Using network %08x\n", (unsigned int)n);
 123         }
 124         if (driver->OpenSocket(socket_number)) {
 125                 return -3;
 126         }
 127
 128 //      if (driver->GetMyAddress)
 129 //              driver->GetMyAddress();
 130         memcpy(&ipx_network, ipx_MyAddress, 4);
 131         Ipx_num_networks = 0;
 132         memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
 133         ipx_installed = 1;
 134         if (ipx_atexit_installed==0){
 135                 atexit(ipx_close);
 136                 ipx_atexit_installed=1;
 137         }
 138         return 0;
 139 }
 140
 141 void ipx_close()
 142 {
 143         if (ipx_installed)
 144                 driver->CloseSocket();
 145         ipx_installed = 0;
 146 }
 147
 148 //########printfs??
 149 int ipx_set_driver(char *arg)
 150 {
 151         ipx_close();
 152
 153         if (!FindArg( "-nonetwork" ))   {
 154                 int socket=0;
 155                 int ipx_error;
 156                 int t;
 157                 if (Inferno_verbose) printf( "\n%s ", TXT_INITIALIZING_NETWORK);
 158                 if ((t=FindArg("-socket")))
 159                         socket = atoi( Args[t+1] );
 160
 161                 if ((t=FindArg("-pps")) && (t = atoi(Args[t+1])) && (t >= 2) && (t <= 20)) {
 162                         Network_initial_pps = t;
 163                 }
 164                 if ( FindArg("-shortpackets") )
 165                         Network_initial_shortpackets = 1;
 166
 167 #ifdef SUPPORTS_NET_IP
 168                 if (strcmp(arg,"ip")==0){
 169                         driver=&ipx_ip;
 170                 }else
 171 #endif
 172                         driver=arch_ipx_set_driver(arg);
 173                 if ((ipx_error=ipx_init(IPX_DEFAULT_SOCKET+socket))==0) {
 174                         if (Inferno_verbose) printf( "%s %d.\n", TXT_IPX_CHANNEL, socket );
 175                         Network_active = 1;
 176                 } else {
 177                         switch( ipx_error )     {
 178                                 case 3:         if (Inferno_verbose) printf( "%s\n", TXT_NO_NETWORK); break;
 179                                 case -2: if (Inferno_verbose) printf( "%s 0x%x.\n", TXT_SOCKET_ERROR, IPX_DEFAULT_SOCKET+socket); break;
 180                                 case -4: if (Inferno_verbose) printf( "%s\n", TXT_MEMORY_IPX ); break;
 181                                 default:
 182                                                          if (Inferno_verbose) printf( "%s %d", TXT_ERROR_IPX, ipx_error );
 183                         }
 184                         if (Inferno_verbose) printf( "%s\n",TXT_NETWORK_DISABLED);
 185                         Network_active = 0;             // Assume no network
 186                 }
 187                 ipx_read_user_file( "descent.usr" );
 188                 ipx_read_network_file( "descent.net" );
 189                 //if ( FindArg( "-dynamicsockets" ))
 190                 //        Network_allow_socket_changes = 1;
 191                 //else
 192                 //        Network_allow_socket_changes = 0;
 193         } else {
 194                 if (Inferno_verbose) printf( "%s\n", TXT_NETWORK_DISABLED);
 195                 Network_active = 0;             // Assume no network
 196         }
 197
 198         return ipx_installed?0:-1;
 199 }
 200
 201 int ipx_get_packet_data( ubyte * data )
 202 {
 203         if (driver->GetPacketData)
 204                 return driver->GetPacketData(data);
 205         else {
 206                 struct ipx_recv_data rd;
 207                 char *buf;
 208                 int size;
 209                 if (driver->usepacketnum)
 210                         buf=alloca(MAX_IPX_DATA);
 211                 else
 212                         buf=data;
 213                 //edited 04/12/99 Matt Mueller - duh, we don't want to throw all that data away!
 214                 while (driver->PacketReady()) {
 215                         if ((size =     driver->ReceivePacket(buf, MAX_IPX_DATA, &rd)) > 4) {
 216                                 if (!memcmp(rd.src_network, ipx_MyAddress, 10)) {
 217                                         mprintf((0,"dumped my own packet\n"));
 218                                         continue;       /* don't get own pkts */
 219                                 }
 220                                 if (driver->usepacketnum){
 221                                         memcpy(data, buf + 4, size - 4);
 222                                         return size-4;
 223                                 }else{
 224                                         return size;
 225                                 }
 226                         }
 227                 }
 228                 return 0;
 229         }
 230 }
 231
 232 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
 233 {
 234         if (driver->SendPacketData)
 235                 driver->SendPacketData(data,datasize,network,address,immediate_address);
 236         else{
 237                 IPXPacket_t ipx_header;
 238
 239                 memcpy(ipx_header.Destination.Network, network, 4);
 240                 memcpy(ipx_header.Destination.Node, immediate_address, 6);
 241 //              *(ushort *)ipx_header.Destination.Socket = htons(ipx_socket_data.socket);
 242                 ipx_header.PacketType = 4; /* Packet Exchange */
 243
 244                 if (driver->usepacketnum){
 245                         ubyte buf[MAX_IPX_DATA];
 246                         *(uint *)buf = ipx_packetnum++;
 247
 248                         memcpy(buf + 4, data, datasize);
 249                         driver->SendPacket(&ipx_header, buf, datasize + 4);
 250                 }else
 251                         driver->SendPacket(&ipx_header, data, datasize);//we can save 4 bytes
 252         }
 253 }
 254
 255 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 256 {
 257         if (driver->GetLocalTarget)
 258                 driver->GetLocalTarget(server,node,local_target);
 259         else
 260         // let's hope Linux knows how to route it
 261                 memcpy( local_target, node, 6 );
 262 }
 263
 264 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
 265 {
 266         int i, j;
 267         ubyte local_address[6];
 268
 269         // Set to all networks besides mine
 270         for (i=0; i<Ipx_num_networks; i++ )     {
 271                 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) )      {
 272                         ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast_addr, local_address );
 273                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast_addr, local_address );
 274                 } else {
 275                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast_addr, broadcast_addr );
 276                 }
 277         }
 278
 279         //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast_addr, broadcast_addr );
 280
 281         // Send directly to all users not on my network or in the network list.
 282         for (i=0; i<Ipx_num_users; i++ )        {
 283                 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) )  {
 284                         for (j=0; j<Ipx_num_networks; j++ )             {
 285                                 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
 286                                         goto SkipUser;
 287                         }
 288                         ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
 289 SkipUser:
 290                         j = 0;
 291                 }
 292         }
 293 }
 294
 295 // Sends a non-localized packet... needs 4 byte server, 6 byte address
 296 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
 297 {
 298         ubyte local_address[6];
 299
 300         if ( (*(uint *)server) != 0 )   {
 301                 ipx_get_local_target( server, address, local_address );
 302                 ipx_send_packet_data( data, datasize, server, address, local_address );
 303         } else {
 304                 // Old method, no server info.
 305                 ipx_send_packet_data( data, datasize, server, address, address );
 306         }
 307 }
 308
 309 int ipx_check_ready_to_join(ubyte *server, ubyte *node){
 310         if (!driver->CheckReadyToJoin)
 311                 return 1;
 312         return driver->CheckReadyToJoin(server,node);
 313 }
 314
 315
 316 int ipx_change_default_socket( ushort socket_number )
 317 {
 318         if ( !ipx_installed ) return -3;
 319
 320         driver->CloseSocket();
 321         if (driver->OpenSocket(socket_number)) {
 322                 return -3;
 323         }
 324         return 0;
 325 }
 326
 327 void ipx_read_user_file(char * filename)
 328 {
 329         FILE * fp;
 330         user_address tmp;
 331         char temp_line[132], *p1;
 332         int n, ln=0, x;
 333
 334         if (!filename) return;
 335
 336         Ipx_num_users = 0;
 337
 338         fp = fopen( filename, "rt" );
 339         if ( !fp ) return;
 340
 341         printf( "Broadcast Users:\n" );
 342
 343         while (fgets(temp_line, 132, fp)) {
 344                 ln++;
 345                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 346                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 347 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 348                 if (strlen(temp_line) >= 21 && temp_line[8] == '/') {
 349                         for (n = 0; n < 4; n++) {
 350                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 351                                         break;
 352                                 tmp.network[n] = x;
 353                         }
 354                         if (n != 4)
 355                                 continue;
 356                         for (n = 0; n < 6; n++) {
 357                                 if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)
 358                                         break;
 359                                 tmp.node[n] = x;
 360                         }
 361                         if (n != 6)
 362                                 continue;
 363                 } else
 364                         continue;
 365 #else
 366                 n = sscanf( temp_line, "%2x%2x%2x%2x/%2x%2x%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3], &tmp.node[0], &tmp.node[1], &tmp.node[2],&tmp.node[3], &tmp.node[4], &tmp.node[5] );
 367                 if ( n != 10 ) continue;
 368 #endif
 369                 if ( Ipx_num_users < MAX_USERS )        {
 370                         ubyte * ipx_real_buffer = (ubyte *)&tmp;
 371                         ipx_get_local_target( tmp.network, tmp.node, tmp.address );
 372                         Ipx_users[Ipx_num_users++] = tmp;
 373                         printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 374                         printf( "%02X%02X%02X%02X%02X%02X\n", ipx_real_buffer[4],ipx_real_buffer[5],ipx_real_buffer[6],ipx_real_buffer[7],ipx_real_buffer[8],ipx_real_buffer[9] );
 375                 } else {
 376                         printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
 377                         fclose(fp);
 378                         return;
 379                 }
 380         }
 381         fclose(fp);
 382 }
 383
 384
 385 void ipx_read_network_file(char * filename)
 386 {
 387         FILE * fp;
 388         user_address tmp;
 389         char temp_line[132], *p1;
 390         int i, n, ln=0, x;
 391
 392         if (!filename) return;
 393
 394         fp = fopen( filename, "rt" );
 395         if ( !fp ) return;
 396
 397         printf( "Using Networks:\n" );
 398         for (i=0; i<Ipx_num_networks; i++ )             {
 399                 ubyte * n1 = (ubyte *)&Ipx_networks[i];
 400                 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
 401         }
 402
 403         while (fgets(temp_line, 132, fp)) {
 404                 ln++;
 405                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 406                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 407 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 408                 if (strlen(temp_line) >= 8) {
 409                         for (n = 0; n < 4; n++) {
 410                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 411                                         break;
 412                                 tmp.network[n] = x;
 413                         }
 414                         if (n != 4)
 415                                 continue;
 416                 } else
 417                         continue;
 418 #else
 419                 n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
 420                 if ( n != 4 ) continue;
 421 #endif
 422                 if ( Ipx_num_networks < MAX_NETWORKS  ) {
 423                         int j;
 424                         for (j=0; j<Ipx_num_networks; j++ )
 425                                 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
 426                                         break;
 427                         if ( j >= Ipx_num_networks )    {
 428                                 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
 429                                 printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
 430                         }
 431                 } else {
 432                         printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
 433                         fclose(fp);
 434                         return;
 435                 }
 436         }
 437         fclose(fp);
 438 }