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