arch/linux/linuxnet.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  *
  16  * Linux lower-level network code.
  17  * implements functions declared in include/ipx.h
  18  *
  19  */
  20
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <conf.h>
  24 #endif
  25
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <unistd.h>
  30 #include <sys/types.h>
  31 #include <sys/time.h>
  32 #include <netinet/in.h> /* for htons & co. */
  33
  34 #include "pstypes.h"
  35 #include "args.h"
  36 #include "error.h"
  37
  38 #include "ipx.h"
  39 #include "ipx_drv.h"
  40 #ifdef NATIVE_IPX
  41 # include "ipx_bsd.h"
  42 #endif //NATIVE_IPX
  43 #ifdef KALINIX
  44 #include "ipx_kali.h"
  45 #endif
  46 #include "ipx_udp.h"
  47 #include "ipx_mcast4.h"
  48 #include "error.h"
  49 #include "../../main/player.h"  /* for Players */
  50 #include "../../main/multi.h"   /* for NetPlayers */
  51 //added 05/17/99 Matt Mueller - needed to redefine FD_* so that no asm is used
  52 //#include "checker.h"
  53 //end addition -MM
  54 #include "byteswap.h"
  55
  56 #define MAX_IPX_DATA 576
  57
  58 int ipx_fd;
  59 ipx_socket_t ipx_socket_data;
  60 ubyte ipx_installed=0;
  61 ushort ipx_socket = 0;
  62 uint ipx_network = 0;
  63 ubyte ipx_MyAddress[10];
  64 int ipx_packetnum = 0;                  /* Sequence number */
  65 //int     ipx_packettotal=0,ipx_lastspeed=0;
  66
  67 /* User defined routing stuff */
  68 typedef struct user_address {
  69         ubyte network[4];
  70         ubyte node[6];
  71         ubyte address[6];
  72 } user_address;
  73 #define MAX_USERS 64
  74 int Ipx_num_users = 0;
  75 user_address Ipx_users[MAX_USERS];
  76
  77 #define MAX_NETWORKS 64
  78 int Ipx_num_networks = 0;
  79 uint Ipx_networks[MAX_NETWORKS];
  80
  81 int ipx_general_PacketReady(ipx_socket_t *s) {
  82         fd_set set;
  83         struct timeval tv;
  84
  85         FD_ZERO(&set);
  86         FD_SET(s->fd, &set);
  87         tv.tv_sec = tv.tv_usec = 0;
  88         if (select(s->fd + 1, &set, NULL, NULL, &tv) > 0)
  89                 return 1;
  90         else
  91                 return 0;
  92 }
  93
  94 struct ipx_driver *driver = &ipx_udp;
  95
  96 ubyte * ipx_get_my_server_address()
  97 {
  98         return (ubyte *)&ipx_network;
  99 }
 100
 101 ubyte * ipx_get_my_local_address()
 102 {
 103         return (ubyte *)(ipx_MyAddress + 4);
 104 }
 105
 106 void arch_ipx_set_driver(int ipx_driver)
 107 {
 108         switch(ipx_driver) {
 109 #ifdef NATIVE_IPX
 110         case IPX_DRIVER_IPX: driver = &ipx_bsd; break;
 111 #endif //NATIVE_IPX
 112 #ifdef KALINIX
 113         case IPX_DRIVER_KALI: driver = &ipx_kali; break;
 114 #endif
 115         case IPX_DRIVER_UDP: driver = &ipx_udp; break;
 116         case IPX_DRIVER_MCAST4: driver = &ipx_mcast4; break;
 117         default: Int3();
 118         }
 119 }
 120
 121 int ipx_init(int socket_number)
 122 {
 123         int i;
 124
 125         if ((i = FindArg("-ipxnetwork")) && Args[i + 1]) {
 126                 unsigned long n = strtol(Args[i + 1], NULL, 16);
 127                 ipx_MyAddress[0] = n >> 24; ipx_MyAddress[1] = (n >> 16) & 255;
 128                 ipx_MyAddress[2] = (n >> 8) & 255; ipx_MyAddress[3] = n & 255;
 129                 printf("IPX: Using network %08x\n", (unsigned int)n);
 130         }
 131         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 132                 return IPX_NOT_INSTALLED;
 133         }
 134         driver->GetMyAddress();
 135         memcpy(&ipx_network, ipx_MyAddress, 4);
 136         Ipx_num_networks = 0;
 137         memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
 138         ipx_installed = 1;
 139         atexit(ipx_close);
 140         return IPX_INIT_OK;
 141 }
 142
 143 void ipx_close()
 144 {
 145         if (ipx_installed)
 146                 driver->CloseSocket(&ipx_socket_data);
 147         ipx_installed = 0;
 148 }
 149
 150 int ipx_get_packet_data( ubyte * data )
 151 {
 152         struct ipx_recv_data rd;
 153         char buf[MAX_IPX_DATA];
 154 //killed 6-15-99 to get rid of compile warnings - OE
 155 //      uint best_id = 0;
 156 //      uint pkt_num;
 157 //end kill - OE
 158         int size;
 159         int best_size = 0;
 160 //edited 04/12/99 Matt Mueller - duh, we don't want to throw all that data away!
 161         //--killed-- Like the original, only take latest packet, throw away rest
 162         //do _NOT_ throw them away!
 163         while (driver->PacketReady(&ipx_socket_data)) {
 164                 if ((size =
 165                      driver->ReceivePacket(&ipx_socket_data, buf,
 166                       sizeof(buf), &rd)) > 4) {
 167                      if (!memcmp(rd.src_network, ipx_MyAddress, 10))
 168                         continue;       /* don't get own pkts */
 169 //--killed--                 pkt_num = INTEL_INT(*(uint *)buf);
 170 //--killed--                 if (pkt_num >= best_id) {
 171                         memcpy(data, buf + 4, size - 4);
 172                                 return size-4;
 173 //--killed--                    best_id = pkt_num;
 174 //--killed--                    best_size = size - 4;
 175 //--killed--                 }
 176 //end edit -MM
 177                 }
 178         }
 179         return best_size;
 180 }
 181
 182 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
 183 {
 184         u_char buf[MAX_IPX_DATA];
 185         IPXPacket_t ipx_header;
 186
 187         Assert(datasize <= MAX_IPX_DATA+4);
 188
 189         memcpy(ipx_header.Destination.Network, network, 4);
 190         memcpy(ipx_header.Destination.Node, immediate_address, 6);
 191         *(u_short *)ipx_header.Destination.Socket = htons(ipx_socket_data.socket);
 192         ipx_header.PacketType = 4; /* Packet Exchange */
 193         *(uint *)buf = INTEL_INT(ipx_packetnum);
 194         ipx_packetnum++;
 195     //ipx_packettotal+=datasize+4;
 196     //if (f2i(Players[Player_num].time_level) && (f2i(Players[Player_num].time_level)%10!=ipx_lastspeed))
 197         //{
 198         //   ipx_lastspeed=f2i(Players[Player_num].time_level)%10;
 199         //   printf("tot=%i,t2=%i,time=%i,avg=%i,a2=%i\n",ipx_packetnum,ipx_packettotal,(int)f2i(Players[Player_num].time_level),
 200         //          ipx_packetnum/(int)f2i(Players[Player_num].time_level),
 201         //          ipx_packettotal/(int)f2i(Players[Player_num].time_level));
 202         //}
 203         memcpy(buf + 4, data, datasize);
 204         driver->SendPacket(&ipx_socket_data, &ipx_header, buf, datasize + 4);
 205 }
 206
 207 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 208 {
 209         // let's hope Linux knows how to route it
 210         memcpy( local_target, node, 6 );
 211 }
 212
 213 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
 214 {
 215         int i, j;
 216         ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 217         ubyte local_address[6];
 218
 219         // Set to all networks besides mine
 220         for (i=0; i<Ipx_num_networks; i++ )     {
 221                 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) )      {
 222                         ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
 223                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
 224                 } else {
 225                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
 226                 }
 227         }
 228
 229         //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
 230
 231         // Send directly to all users not on my network or in the network list.
 232         for (i=0; i<Ipx_num_users; i++ )        {
 233                 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) )  {
 234                         for (j=0; j<Ipx_num_networks; j++ )             {
 235                                 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
 236                                         goto SkipUser;
 237                         }
 238                         ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
 239 SkipUser:
 240                         j = 0;
 241                 }
 242         }
 243 }
 244
 245 // Sends a non-localized packet... needs 4 byte server, 6 byte address
 246 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
 247 {
 248         ubyte local_address[6];
 249
 250 #ifdef WORDS_NEED_ALIGNMENT
 251         int zero = 0;
 252         if (memcmp(server, &zero, 4)) {
 253 #else // WORDS_NEED_ALIGNMENT
 254         if ((*(uint *)server) != 0) {
 255 #endif // WORDS_NEED_ALIGNMENT
 256                 ipx_get_local_target( server, address, local_address );
 257                 ipx_send_packet_data( data, datasize, server, address, local_address );
 258         } else {
 259                 // Old method, no server info.
 260                 ipx_send_packet_data( data, datasize, server, address, address );
 261         }
 262 }
 263
 264 int ipx_change_default_socket( ushort socket_number )
 265 {
 266         if ( !ipx_installed ) return -3;
 267
 268         driver->CloseSocket(&ipx_socket_data);
 269         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 270                 return -3;
 271         }
 272         return 0;
 273 }
 274
 275 void ipx_read_user_file(char * filename)
 276 {
 277         FILE * fp;
 278         user_address tmp;
 279         char temp_line[132], *p1;
 280         int n, ln=0, x;
 281
 282         if (!filename) return;
 283
 284         Ipx_num_users = 0;
 285
 286         fp = fopen( filename, "rt" );
 287         if ( !fp ) return;
 288
 289         printf( "Broadcast Users:\n" );
 290
 291         while (fgets(temp_line, 132, fp)) {
 292                 ln++;
 293                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 294                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 295 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 296                 if (strlen(temp_line) >= 21 && temp_line[8] == '/') {
 297                         for (n = 0; n < 4; n++) {
 298                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 299                                         break;
 300                                 tmp.network[n] = x;
 301                         }
 302                         if (n != 4)
 303                                 continue;
 304                         for (n = 0; n < 6; n++) {
 305                                 if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)
 306                                         break;
 307                                 tmp.node[n] = x;
 308                         }
 309                         if (n != 6)
 310                                 continue;
 311                 } else
 312                         continue;
 313 #else
 314                 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] );
 315                 if ( n != 10 ) continue;
 316 #endif
 317                 if ( Ipx_num_users < MAX_USERS )        {
 318                         ubyte * ipx_real_buffer = (ubyte *)&tmp;
 319                         ipx_get_local_target( tmp.network, tmp.node, tmp.address );
 320                         Ipx_users[Ipx_num_users++] = tmp;
 321                         printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 322                         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] );
 323                 } else {
 324                         printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
 325                         fclose(fp);
 326                         return;
 327                 }
 328         }
 329         fclose(fp);
 330 }
 331
 332
 333 void ipx_read_network_file(char * filename)
 334 {
 335         FILE * fp;
 336         user_address tmp;
 337         char temp_line[132], *p1;
 338         int i, n, ln=0, x;
 339
 340         if (!filename) return;
 341
 342         fp = fopen( filename, "rt" );
 343         if ( !fp ) return;
 344
 345         printf( "Using Networks:\n" );
 346         for (i=0; i<Ipx_num_networks; i++ )             {
 347                 ubyte * n1 = (ubyte *)&Ipx_networks[i];
 348                 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
 349         }
 350
 351         while (fgets(temp_line, 132, fp)) {
 352                 ln++;
 353                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 354                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 355 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 356                 if (strlen(temp_line) >= 8) {
 357                         for (n = 0; n < 4; n++) {
 358                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 359                                         break;
 360                                 tmp.network[n] = x;
 361                         }
 362                         if (n != 4)
 363                                 continue;
 364                 } else
 365                         continue;
 366 #else
 367                 n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
 368                 if ( n != 4 ) continue;
 369 #endif
 370                 if ( Ipx_num_networks < MAX_NETWORKS  ) {
 371                         int j;
 372                         for (j=0; j<Ipx_num_networks; j++ )
 373                                 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
 374                                         break;
 375                         if ( j >= Ipx_num_networks )    {
 376                                 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
 377                                 printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
 378                         }
 379                 } else {
 380                         printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
 381                         fclose(fp);
 382                         return;
 383                 }
 384         }
 385         fclose(fp);
 386 }
 387
 388 // Initalizes the protocol-specific member of the netgame packet.
 389 void ipx_init_netgame_aux_data(ubyte buf[])
 390 {
 391         if(driver->InitNetgameAuxData)
 392                 driver->InitNetgameAuxData(&ipx_socket_data, buf);
 393 }
 394
 395 // Handles the protocol-specific member of the netgame packet.
 396 int ipx_handle_netgame_aux_data(const ubyte buf[])
 397 {
 398         if(driver->HandleNetgameAuxData)
 399                 return driver->HandleNetgameAuxData(&ipx_socket_data, buf);
 400         return 0;
 401 }
 402
 403 // Notifies the protocol that we're done with a particular game
 404 void ipx_handle_leave_game()
 405 {
 406         if(driver->HandleLeaveGame)
 407                 driver->HandleLeaveGame(&ipx_socket_data);
 408 }
 409
 410 // Send a packet to every member of the game.
 411 int ipx_send_game_packet(ubyte *data, int datasize)
 412 {
 413         if(driver->SendGamePacket) {
 414                 u_char buf[MAX_IPX_DATA];
 415
 416                 *(uint *)buf = ipx_packetnum++;
 417                 memcpy(buf + 4, data, datasize);
 418                 *(uint *)data = ipx_packetnum++;
 419                 return driver->SendGamePacket(&ipx_socket_data, buf, datasize + 4);
 420         } else {
 421                 // Loop through all the players unicasting the packet.
 422                 int i;
 423
 424                 //printf("Sending game packet: N_players = %i\n", N_players);
 425
 426                 for(i=0; i<N_players; i++) {
 427                         if(Players[i].connected && (i != Player_num))
 428                                 ipx_send_packet_data(data, datasize, NetPlayers.players[i].network.ipx.server, NetPlayers.players[i].network.ipx.node,Players[i].net_address);
 429                 }
 430                 return datasize;
 431         }
 432
 433         return 0;
 434 }