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 #ifdef HAVE_UNISTD_H
  30 #include <unistd.h>
  31 #endif
  32 #include <sys/types.h>
  33 #if 0//def HAVE_SYS_TIME_H
  34 #include <sys/time.h>
  35 #endif
  36
  37 #ifdef _WIN32
  38 #include <winsock.h>
  39 #else
  40 #include <netinet/in.h> /* for htons & co. */
  41 #endif
  42
  43 #include "pstypes.h"
  44 #include "args.h"
  45 #include "dxxerror.h"
  46
  47 #include "ipx.h"
  48 #include "ipx_drv.h"
  49 #ifdef NATIVE_IPX
  50 # include "ipx_bsd.h"
  51 #endif //NATIVE_IPX
  52 #ifdef KALINIX
  53 #include "ipx_kali.h"
  54 #endif
  55 #include "ipx_udp.h"
  56 #include "ipx_mcast4.h"
  57 #include "dxxerror.h"
  58 #include "inferno.h"
  59 //added 05/17/99 Matt Mueller - needed to redefine FD_* so that no asm is used
  60 //#include "checker.h"
  61 //end addition -MM
  62 #include "byteswap.h"
  63
  64
  65 #ifdef _WIN32
  66 extern struct ipx_driver ipx_win;
  67 #endif
  68
  69 #define MAX_IPX_DATA 576
  70
  71 int ipx_fd;
  72 ipx_socket_t ipx_socket_data;
  73 ubyte ipx_installed=0;
  74 ushort ipx_socket = 0;
  75 uint ipx_network = 0;
  76 ubyte ipx_MyAddress[10];
  77 int ipx_packetnum = 0;                  /* Sequence number */
  78 //int     ipx_packettotal=0,ipx_lastspeed=0;
  79
  80 /* User defined routing stuff */
  81 typedef struct user_address {
  82         ubyte network[4];
  83         ubyte node[6];
  84         ubyte address[6];
  85 } user_address;
  86 #define MAX_USERS 64
  87 int Ipx_num_users = 0;
  88 user_address Ipx_users[MAX_USERS];
  89
  90 #define MAX_NETWORKS 64
  91 int Ipx_num_networks = 0;
  92 uint Ipx_networks[MAX_NETWORKS];
  93
  94 int ipx_general_PacketReady(ipx_socket_t *s) {
  95         fd_set set;
  96         struct timeval tv;
  97
  98         FD_ZERO(&set);
  99         FD_SET(s->fd, &set);
 100         tv.tv_sec = tv.tv_usec = 0;
 101         if (select(s->fd + 1, &set, NULL, NULL, &tv) > 0)
 102                 return 1;
 103         else
 104                 return 0;
 105 }
 106
 107 struct ipx_driver *driver = &ipx_udp;
 108
 109 ubyte * ipx_get_my_server_address()
 110 {
 111         return (ubyte *)&ipx_network;
 112 }
 113
 114 ubyte * ipx_get_my_local_address()
 115 {
 116         return (ubyte *)(ipx_MyAddress + 4);
 117 }
 118
 119 void arch_ipx_set_driver(int ipx_driver)
 120 {
 121         switch(ipx_driver) {
 122 #ifdef _WIN32
 123         case IPX_DRIVER_IPX: driver = &ipx_win; break;
 124 #else
 125 #ifdef NATIVE_IPX
 126         case IPX_DRIVER_IPX: driver = &ipx_bsd; break;
 127 #endif //NATIVE_IPX
 128 #endif
 129 #ifdef KALINIX
 130         case IPX_DRIVER_KALI: driver = &ipx_kali; break;
 131 #endif
 132         case IPX_DRIVER_UDP: driver = &ipx_udp; break;
 133         case IPX_DRIVER_MCAST4: driver = &ipx_mcast4; break;
 134         default: Int3();
 135         }
 136 }
 137
 138 int ipx_init(int socket_number)
 139 {
 140         int i;
 141 #ifdef _WIN32
 142         WORD wVersionRequested;
 143         WSADATA wsaData;
 144
 145         wVersionRequested = MAKEWORD(2, 0);
 146         if (WSAStartup( wVersionRequested, &wsaData))
 147         {
 148                 return IPX_SOCKET_ALREADY_OPEN;
 149         }
 150
 151 #if 0
 152         if ( LOBYTE( wsaData.wVersion ) != 2 ||
 153                 HIBYTE( wsaData.wVersion ) != 0 ) {
 154                 /* We couldn't find a usable WinSock DLL. */
 155                 WSACleanup( );
 156                 return IPX_SOCKET_TABLE_FULL;
 157         }
 158 #endif
 159 #endif
 160
 161         if ((i = FindArg("-ipxnetwork")) && Args[i + 1]) {
 162                 unsigned long n = strtol(Args[i + 1], NULL, 16);
 163                 ipx_MyAddress[0] = n >> 24; ipx_MyAddress[1] = (n >> 16) & 255;
 164                 ipx_MyAddress[2] = (n >> 8) & 255; ipx_MyAddress[3] = n & 255;
 165                 printf("IPX: Using network %08x\n", (unsigned int)n);
 166         }
 167         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 168                 return IPX_NOT_INSTALLED;
 169         }
 170         driver->GetMyAddress();
 171         memcpy(&ipx_network, ipx_MyAddress, 4);
 172         Ipx_num_networks = 0;
 173         memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
 174         ipx_installed = 1;
 175         atexit(ipx_close);
 176         return IPX_INIT_OK;
 177 }
 178
 179 void ipx_close()
 180 {
 181         if (ipx_installed)
 182         {
 183 #ifdef _WIN32
 184                 WSACleanup();
 185 #endif
 186                 driver->CloseSocket(&ipx_socket_data);
 187         }
 188         ipx_installed = 0;
 189 }
 190
 191 int ipx_get_packet_data( ubyte * data )
 192 {
 193         struct ipx_recv_data rd;
 194         char buf[MAX_IPX_DATA];
 195 //killed 6-15-99 to get rid of compile warnings - OE
 196 //      uint best_id = 0;
 197 //      uint pkt_num;
 198 //end kill - OE
 199         int size;
 200         int best_size = 0;
 201 //edited 04/12/99 Matt Mueller - duh, we don't want to throw all that data away!
 202         //--killed-- Like the original, only take latest packet, throw away rest
 203         //do _NOT_ throw them away!
 204         while (driver->PacketReady(&ipx_socket_data)) {
 205                 if ((size =
 206                      driver->ReceivePacket(&ipx_socket_data, buf,
 207                       sizeof(buf), &rd)) > 4) {
 208                      if (!memcmp(rd.src_network, ipx_MyAddress, 10))
 209                         continue;       /* don't get own pkts */
 210 //--killed--                 pkt_num = INTEL_INT(*(uint *)buf);
 211 //--killed--                 if (pkt_num >= best_id) {
 212                         memcpy(data, buf + 4, size - 4);
 213                                 return size-4;
 214 //--killed--                    best_id = pkt_num;
 215 //--killed--                    best_size = size - 4;
 216 //--killed--                 }
 217 //end edit -MM
 218                 }
 219         }
 220         return best_size;
 221 }
 222
 223 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
 224 {
 225         u_char buf[MAX_IPX_DATA];
 226         IPXPacket_t ipx_header;
 227
 228         Assert(datasize <= MAX_IPX_DATA+4);
 229
 230         memcpy(ipx_header.Destination.Network, network, 4);
 231         memcpy(ipx_header.Destination.Node, immediate_address, 6);
 232         {
 233                 u_short socket = htons(ipx_socket_data.socket);
 234                 memcpy(ipx_header.Destination.Socket, &socket, 2);
 235         }
 236         ipx_header.PacketType = 4; /* Packet Exchange */
 237         {
 238                 int packetnum = INTEL_INT(ipx_packetnum);
 239                 memcpy(buf, &packetnum, 4);
 240         }
 241         ipx_packetnum++;
 242     //ipx_packettotal+=datasize+4;
 243     //if (f2i(Players[Player_num].time_level) && (f2i(Players[Player_num].time_level)%10!=ipx_lastspeed))
 244         //{
 245         //   ipx_lastspeed=f2i(Players[Player_num].time_level)%10;
 246         //   printf("tot=%i,t2=%i,time=%i,avg=%i,a2=%i\n",ipx_packetnum,ipx_packettotal,(int)f2i(Players[Player_num].time_level),
 247         //          ipx_packetnum/(int)f2i(Players[Player_num].time_level),
 248         //          ipx_packettotal/(int)f2i(Players[Player_num].time_level));
 249         //}
 250         memcpy(buf + 4, data, datasize);
 251         driver->SendPacket(&ipx_socket_data, &ipx_header, buf, datasize + 4);
 252 }
 253
 254 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 255 {
 256         // let's hope Linux knows how to route it
 257         memcpy( local_target, node, 6 );
 258 }
 259
 260 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
 261 {
 262         int i, j;
 263         ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 264         ubyte local_address[6];
 265
 266         // Set to all networks besides mine
 267         for (i=0; i<Ipx_num_networks; i++ )     {
 268                 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) )      {
 269                         ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
 270                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
 271                 } else {
 272                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
 273                 }
 274         }
 275
 276         //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
 277
 278         // Send directly to all users not on my network or in the network list.
 279         for (i=0; i<Ipx_num_users; i++ )        {
 280                 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) )  {
 281                         for (j=0; j<Ipx_num_networks; j++ )             {
 282                                 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
 283                                         goto SkipUser;
 284                         }
 285                         ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
 286 SkipUser:
 287                         j = 0;
 288                 }
 289         }
 290 }
 291
 292 // Sends a non-localized packet... needs 4 byte server, 6 byte address
 293 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
 294 {
 295         ubyte local_address[6];
 296
 297 #ifdef WORDS_NEED_ALIGNMENT
 298         int zero = 0;
 299         if (memcmp(server, &zero, 4)) {
 300 #else // WORDS_NEED_ALIGNMENT
 301         if ((*(uint *)server) != 0) {
 302 #endif // WORDS_NEED_ALIGNMENT
 303                 ipx_get_local_target( server, address, local_address );
 304                 ipx_send_packet_data( data, datasize, server, address, local_address );
 305         } else {
 306                 // Old method, no server info.
 307                 ipx_send_packet_data( data, datasize, server, address, address );
 308         }
 309 }
 310
 311 int ipx_change_default_socket( ushort socket_number )
 312 {
 313         if ( !ipx_installed ) return -3;
 314
 315         driver->CloseSocket(&ipx_socket_data);
 316         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 317                 return -3;
 318         }
 319         return 0;
 320 }
 321
 322 void ipx_read_user_file(char * filename)
 323 {
 324         FILE * fp;
 325         user_address tmp;
 326         char temp_line[132], *p1;
 327         int n, ln=0, x;
 328
 329         if (!filename) return;
 330
 331         Ipx_num_users = 0;
 332
 333         fp = fopen( filename, "rt" );
 334         if ( !fp ) return;
 335
 336         printf( "Broadcast Users:\n" );
 337
 338         while (fgets(temp_line, 132, fp)) {
 339                 ln++;
 340                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 341                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 342 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 343                 if (strlen(temp_line) >= 21 && temp_line[8] == '/') {
 344                         for (n = 0; n < 4; n++) {
 345                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 346                                         break;
 347                                 tmp.network[n] = x;
 348                         }
 349                         if (n != 4)
 350                                 continue;
 351                         for (n = 0; n < 6; n++) {
 352                                 if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)
 353                                         break;
 354                                 tmp.node[n] = x;
 355                         }
 356                         if (n != 6)
 357                                 continue;
 358                 } else
 359                         continue;
 360 #else
 361                 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] );
 362                 if ( n != 10 ) continue;
 363 #endif
 364                 if ( Ipx_num_users < MAX_USERS )        {
 365                         ubyte * ipx_real_buffer = (ubyte *)&tmp;
 366                         ipx_get_local_target( tmp.network, tmp.node, tmp.address );
 367                         Ipx_users[Ipx_num_users++] = tmp;
 368                         printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 369                         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] );
 370                 } else {
 371                         printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
 372                         fclose(fp);
 373                         return;
 374                 }
 375         }
 376         fclose(fp);
 377 }
 378
 379
 380 void ipx_read_network_file(char * filename)
 381 {
 382         FILE * fp;
 383         user_address tmp;
 384         char temp_line[132], *p1;
 385         int i, n, ln=0, x;
 386
 387         if (!filename) return;
 388
 389         fp = fopen( filename, "rt" );
 390         if ( !fp ) return;
 391
 392         printf( "Using Networks:\n" );
 393         for (i=0; i<Ipx_num_networks; i++ )             {
 394                 ubyte * n1 = (ubyte *)&Ipx_networks[i];
 395                 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
 396         }
 397
 398         while (fgets(temp_line, 132, fp)) {
 399                 ln++;
 400                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 401                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 402 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 403                 if (strlen(temp_line) >= 8) {
 404                         for (n = 0; n < 4; n++) {
 405                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 406                                         break;
 407                                 tmp.network[n] = x;
 408                         }
 409                         if (n != 4)
 410                                 continue;
 411                 } else
 412                         continue;
 413 #else
 414                 n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
 415                 if ( n != 4 ) continue;
 416 #endif
 417                 if ( Ipx_num_networks < MAX_NETWORKS  ) {
 418                         int j;
 419                         for (j=0; j<Ipx_num_networks; j++ )
 420                                 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
 421                                         break;
 422                         if ( j >= Ipx_num_networks )    {
 423                                 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
 424                                 printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
 425                         }
 426                 } else {
 427                         printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
 428                         fclose(fp);
 429                         return;
 430                 }
 431         }
 432         fclose(fp);
 433 }
 434
 435 // Initalizes the protocol-specific member of the netgame packet.
 436 void ipx_init_netgame_aux_data(ubyte buf[])
 437 {
 438         if(driver->InitNetgameAuxData)
 439                 driver->InitNetgameAuxData(&ipx_socket_data, buf);
 440 }
 441
 442 // Handles the protocol-specific member of the netgame packet.
 443 int ipx_handle_netgame_aux_data(const ubyte buf[])
 444 {
 445         if(driver->HandleNetgameAuxData)
 446                 return driver->HandleNetgameAuxData(&ipx_socket_data, buf);
 447         return 0;
 448 }
 449
 450 // Notifies the protocol that we're done with a particular game
 451 void ipx_handle_leave_game()
 452 {
 453         if(driver->HandleLeaveGame)
 454                 driver->HandleLeaveGame(&ipx_socket_data);
 455 }
 456
 457 // Send a packet to every member of the game.
 458 int ipx_send_game_packet(ubyte *data, int datasize)
 459 {
 460         if(driver->SendGamePacket) {
 461                 u_char buf[MAX_IPX_DATA];
 462
 463                 memcpy(buf, &ipx_packetnum, 4);
 464                 ipx_packetnum++;
 465                 memcpy(buf + 4, data, datasize);
 466                 *(uint *)data = ipx_packetnum++;
 467                 return driver->SendGamePacket(&ipx_socket_data, buf, datasize + 4);
 468         } else {
 469                 // Loop through all the players unicasting the packet.
 470                 int i;
 471
 472                 //printf("Sending game packet: N_players = %i\n", N_players);
 473
 474                 for(i=0; i<N_players; i++) {
 475                         if(Players[i].connected && (i != Player_num))
 476                                 ipx_send_packet_data(data, datasize, NetPlayers.players[i].network.ipx.server, NetPlayers.players[i].network.ipx.node,Players[i].net_address);
 477                 }
 478                 return datasize;
 479         }
 480
 481         return 0;
 482 }