arch/win32/winnet.c

   1 /* $Id: winnet.c,v 1.10 2003-10-12 09:17:47 btb Exp $ */
   2 /*
   3 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
   4 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
   5 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
   6 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
   7 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
   8 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
   9 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
  10 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
  11 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
  12 COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  13 */
  14
  15 /*
  16  *
  17  * Win32 lower-level network code.
  18  * implements functions declared in include/ipx.h
  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 <winsock.h>
  30
  31 #include "args.h"
  32 #include "error.h"
  33 #include "ipx.h"
  34 #include "ipx_drv.h"
  35 #include "ipx_udp.h"
  36 #include "ipx_mcast4.h"
  37 #include "../../main/player.h"  /* for Players */
  38 #include "../../main/multi.h"   /* for NetPlayers */
  39
  40 extern struct ipx_driver ipx_win;
  41
  42 #define MAX_IPX_DATA 576
  43
  44 int ipx_fd;
  45 ipx_socket_t ipx_socket_data;
  46 ubyte ipx_installed=0;
  47 ushort ipx_socket = 0;
  48 uint ipx_network = 0;
  49 ubyte ipx_MyAddress[10];
  50 int ipx_packetnum = 0;                  /* Sequence number */
  51
  52 /* User defined routing stuff */
  53 typedef struct user_address {
  54         ubyte network[4];
  55         ubyte node[6];
  56         ubyte address[6];
  57 } user_address;
  58 #define MAX_USERS 64
  59 int Ipx_num_users = 0;
  60 user_address Ipx_users[MAX_USERS];
  61
  62 #define MAX_NETWORKS 64
  63 int Ipx_num_networks = 0;
  64 uint Ipx_networks[MAX_NETWORKS];
  65
  66 int ipx_general_PacketReady(ipx_socket_t *s) {
  67         fd_set set;
  68         struct timeval tv;
  69
  70         FD_ZERO(&set);
  71         FD_SET(s->fd, &set);
  72         tv.tv_sec = tv.tv_usec = 0;
  73         if (select(FD_SETSIZE, &set, NULL, NULL, &tv) > 0)
  74                 return 1;
  75         else
  76                 return 0;
  77 }
  78
  79 struct ipx_driver *driver = &ipx_win;
  80
  81 ubyte * ipx_get_my_server_address()
  82 {
  83         return (ubyte *)&ipx_network;
  84 }
  85
  86 ubyte * ipx_get_my_local_address()
  87 {
  88         return (ubyte *)(ipx_MyAddress + 4);
  89 }
  90
  91 void arch_ipx_set_driver(int ipx_driver)
  92 {
  93         switch(ipx_driver) {
  94         case IPX_DRIVER_IPX: driver = &ipx_win; break;
  95         case IPX_DRIVER_UDP: driver = &ipx_udp; break;
  96         case IPX_DRIVER_MCAST4: driver = &ipx_mcast4; break;
  97         default: Int3();
  98         }
  99 }
 100
 101 int ipx_init(int socket_number)
 102 {
 103         int i;
 104
 105         WORD wVersionRequested;
 106         WSADATA wsaData;
 107
 108         wVersionRequested = MAKEWORD(2, 0);
 109         if (WSAStartup( wVersionRequested, &wsaData))
 110         {
 111           return IPX_SOCKET_ALREADY_OPEN;
 112         }
 113
 114 #if 0
 115         if ( LOBYTE( wsaData.wVersion ) != 2 ||
 116           HIBYTE( wsaData.wVersion ) != 0 ) {
 117            /* We couldn't find a usable WinSock DLL. */
 118            WSACleanup( );
 119            return IPX_SOCKET_TABLE_FULL;
 120         }
 121 #endif
 122
 123         if ((i = FindArg("-ipxnetwork")) && Args[i + 1]) {
 124                 unsigned long n = strtol(Args[i + 1], NULL, 16);
 125                 ipx_MyAddress[0] = (unsigned char)n >> 24; ipx_MyAddress[1] = (unsigned char)(n >> 16) & 255;
 126                 ipx_MyAddress[2] = (unsigned char)(n >> 8) & 255; ipx_MyAddress[3] = (unsigned char)n & 255;
 127                 printf("IPX: Using network %08x\n", (int) n);
 128         }
 129         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 130                 return IPX_NOT_INSTALLED;
 131         }
 132         driver->GetMyAddress();
 133         memcpy(&ipx_network, ipx_MyAddress, 4);
 134         Ipx_num_networks = 0;
 135         memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
 136         ipx_installed = 1;
 137         atexit(ipx_close);
 138         printf("ipx succesfully installed\n");
 139         return IPX_INIT_OK;
 140 }
 141
 142 void ipx_close()
 143 {
 144         if (ipx_installed) {
 145                 WSACleanup();
 146                 driver->CloseSocket(&ipx_socket_data);
 147         }
 148         ipx_installed = 0;
 149 }
 150
 151 int ipx_get_packet_data( ubyte * data )
 152 {
 153         struct ipx_recv_data rd;
 154         char buf[MAX_IPX_DATA];
 155 //killed 6-15-99 to get rid of compile warnings - OE
 156 //      uint best_id = 0;
 157 //      uint pkt_num;
 158 //end kill - OE
 159         int size;
 160         int best_size = 0;
 161 //edited 04/12/99 Matt Mueller - duh, we don't want to throw all that data away!
 162         //--killed-- Like the original, only take latest packet, throw away rest
 163         //do _NOT_ throw them away!
 164         while (driver->PacketReady(&ipx_socket_data)) {
 165                 if ((size =
 166                      driver->ReceivePacket(&ipx_socket_data, buf,
 167                       sizeof(buf), &rd)) > 4) {
 168                      if (!memcmp(rd.src_network, ipx_MyAddress, 10))
 169                         continue;       /* don't get own pkts */
 170 //--killed--                 pkt_num = *(uint *)buf;
 171 //--killed--                 if (pkt_num >= best_id) {
 172                         memcpy(data, buf + 4, size - 4);
 173                                 return size-4;
 174 //--killed--                    best_id = pkt_num;
 175 //--killed--                    best_size = size - 4;
 176 //--killed--                 }
 177 //end edit -MM
 178                 }
 179         }
 180         return best_size;
 181 }
 182
 183 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
 184 {
 185         u_char buf[MAX_IPX_DATA];
 186         IPXPacket_t ipx_header;
 187
 188         memcpy(ipx_header.Destination.Network, network, 4);
 189         memcpy(ipx_header.Destination.Node, immediate_address, 6);
 190         *(u_short *)ipx_header.Destination.Socket = htons(ipx_socket_data.socket);
 191         ipx_header.PacketType = 4; /* Packet Exchange */
 192         *(uint *)buf = ipx_packetnum++;
 193         memcpy(buf + 4, data, datasize);
 194         driver->SendPacket(&ipx_socket_data, &ipx_header, buf, datasize + 4);
 195 }
 196
 197 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 198 {
 199         // let's hope Linux knows how to route it
 200         memcpy( local_target, node, 6 );
 201 }
 202
 203 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
 204 {
 205         int i, j;
 206         ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 207         ubyte local_address[6];
 208
 209         // Set to all networks besides mine
 210         for (i=0; i<Ipx_num_networks; i++ )     {
 211                 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) )      {
 212                         ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
 213                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
 214                 } else {
 215                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
 216                 }
 217         }
 218
 219         //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
 220
 221         // Send directly to all users not on my network or in the network list.
 222         for (i=0; i<Ipx_num_users; i++ )        {
 223                 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) )  {
 224                         for (j=0; j<Ipx_num_networks; j++ )             {
 225                                 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
 226                                         goto SkipUser;
 227                         }
 228                         ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
 229 SkipUser:
 230                         j = 0;
 231                 }
 232         }
 233 }
 234
 235 // Sends a non-localized packet... needs 4 byte server, 6 byte address
 236 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
 237 {
 238         ubyte local_address[6];
 239
 240         if ( (*(uint *)server) != 0 )   {
 241                 ipx_get_local_target( server, address, local_address );
 242                 ipx_send_packet_data( data, datasize, server, address, local_address );
 243         } else {
 244                 // Old method, no server info.
 245                 ipx_send_packet_data( data, datasize, server, address, address );
 246         }
 247 }
 248
 249 int ipx_change_default_socket( ushort socket_number )
 250 {
 251         if ( !ipx_installed ) return -3;
 252
 253         driver->CloseSocket(&ipx_socket_data);
 254         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 255                 return -3;
 256         }
 257         return 0;
 258 }
 259
 260 void ipx_read_user_file(char * filename)
 261 {
 262         FILE * fp;
 263         user_address tmp;
 264         char temp_line[132], *p1;
 265         int n, ln=0, x;
 266
 267         if (!filename) return;
 268
 269         Ipx_num_users = 0;
 270
 271         fp = fopen( filename, "rt" );
 272         if ( !fp ) return;
 273
 274         printf( "Broadcast Users:\n" );
 275
 276         while (fgets(temp_line, 132, fp)) {
 277                 ln++;
 278                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 279                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 280 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 281                 if (strlen(temp_line) >= 21 && temp_line[8] == '/') {
 282                         for (n = 0; n < 4; n++) {
 283                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 284                                         break;
 285                                 tmp.network[n] = x;
 286                         }
 287                         if (n != 4)
 288                                 continue;
 289                         for (n = 0; n < 6; n++) {
 290                                 if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)
 291                                         break;
 292                                 tmp.node[n] = x;
 293                         }
 294                         if (n != 6)
 295                                 continue;
 296                 } else
 297                         continue;
 298 #else
 299                 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] );
 300                 if ( n != 10 ) continue;
 301 #endif
 302                 if ( Ipx_num_users < MAX_USERS )        {
 303                         ubyte * ipx_real_buffer = (ubyte *)&tmp;
 304                         ipx_get_local_target( tmp.network, tmp.node, tmp.address );
 305                         Ipx_users[Ipx_num_users++] = tmp;
 306                         printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 307                         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] );
 308                 } else {
 309                         printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
 310                         fclose(fp);
 311                         return;
 312                 }
 313         }
 314         fclose(fp);
 315 }
 316
 317
 318 void ipx_read_network_file(char * filename)
 319 {
 320         FILE * fp;
 321         user_address tmp;
 322         char temp_line[132], *p1;
 323         int i, n, ln=0, x;
 324
 325         if (!filename) return;
 326
 327         fp = fopen( filename, "rt" );
 328         if ( !fp ) return;
 329
 330         printf( "Using Networks:\n" );
 331         for (i=0; i<Ipx_num_networks; i++ )             {
 332                 ubyte * n1 = (ubyte *)&Ipx_networks[i];
 333                 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
 334         }
 335
 336         while (fgets(temp_line, 132, fp)) {
 337                 ln++;
 338                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 339                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 340 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 341                 if (strlen(temp_line) >= 8) {
 342                         for (n = 0; n < 4; n++) {
 343                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 344                                         break;
 345                                 tmp.network[n] = x;
 346                         }
 347                         if (n != 4)
 348                                 continue;
 349                 } else
 350                         continue;
 351 #else
 352                 n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
 353                 if ( n != 4 ) continue;
 354 #endif
 355                 if ( Ipx_num_networks < MAX_NETWORKS  ) {
 356                         int j;
 357                         for (j=0; j<Ipx_num_networks; j++ )
 358                                 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
 359                                         break;
 360                         if ( j >= Ipx_num_networks )    {
 361                                 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
 362                                 printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
 363                         }
 364                 } else {
 365                         printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
 366                         fclose(fp);
 367                         return;
 368                 }
 369         }
 370         fclose(fp);
 371 }
 372
 373 // Initalizes the protocol-specific member of the netgame packet.
 374 void ipx_init_netgame_aux_data(ubyte buf[])
 375 {
 376         if(driver->InitNetgameAuxData)
 377                 driver->InitNetgameAuxData(&ipx_socket_data, buf);
 378 }
 379
 380 // Handles the protocol-specific member of the netgame packet.
 381 int ipx_handle_netgame_aux_data(const ubyte buf[])
 382 {
 383         if(driver->HandleNetgameAuxData)
 384                 return driver->HandleNetgameAuxData(&ipx_socket_data, buf);
 385         return 0;
 386 }
 387
 388 // Notifies the protocol that we're done with a particular game
 389 void ipx_handle_leave_game()
 390 {
 391         if(driver->HandleLeaveGame)
 392                 driver->HandleLeaveGame(&ipx_socket_data);
 393 }
 394
 395 // Send a packet to every member of the game.
 396 int ipx_send_game_packet(ubyte *data, int datasize)
 397 {
 398         if(driver->SendGamePacket) {
 399                 u_char buf[MAX_IPX_DATA];
 400
 401                 *(uint *)buf = ipx_packetnum++;
 402                 memcpy(buf + 4, data, datasize);
 403                 *(uint *)data = ipx_packetnum++;
 404                 return driver->SendGamePacket(&ipx_socket_data, buf, datasize + 4);
 405         } else {
 406                 // Loop through all the players unicasting the packet.
 407                 int i;
 408
 409                 //printf("Sending game packet: N_players = %i\n", N_players);
 410
 411                 for(i=0; i<N_players; i++) {
 412                         if(Players[i].connected && (i != Player_num))
 413                                 ipx_send_packet_data(data, datasize, NetPlayers.players[i].network.ipx.server, NetPlayers.players[i].network.ipx.node,Players[i].net_address);
 414                 }
 415                 return datasize;
 416         }
 417
 418         return 0;
 419 }