arch/win32/winnet.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  * Win32 lower-level network code.
  17  * implements functions declared in include/ipx.h
  18  *
  19  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include <conf.h>
  23 #endif
  24
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <winsock.h>
  29
  30 #include "args.h"
  31 #include "error.h"
  32 #include "ipx.h"
  33 #include "ipx_drv.h"
  34 #include "ipx_udp.h"
  35 #include "ipx_mcast4.h"
  36 #include "../../main/player.h"  /* for Players */
  37 #include "../../main/multi.h"   /* for NetPlayers */
  38
  39 extern struct ipx_driver ipx_win;
  40
  41 #define MAX_IPX_DATA 576
  42
  43 int ipx_fd;
  44 ipx_socket_t ipx_socket_data;
  45 ubyte ipx_installed=0;
  46 ushort ipx_socket = 0;
  47 uint ipx_network = 0;
  48 ubyte ipx_MyAddress[10];
  49 int ipx_packetnum = 0;                  /* Sequence number */
  50
  51 /* User defined routing stuff */
  52 typedef struct user_address {
  53         ubyte network[4];
  54         ubyte node[6];
  55         ubyte address[6];
  56 } user_address;
  57 #define MAX_USERS 64
  58 int Ipx_num_users = 0;
  59 user_address Ipx_users[MAX_USERS];
  60
  61 #define MAX_NETWORKS 64
  62 int Ipx_num_networks = 0;
  63 uint Ipx_networks[MAX_NETWORKS];
  64
  65 int ipx_general_PacketReady(ipx_socket_t *s) {
  66         fd_set set;
  67         struct timeval tv;
  68
  69         FD_ZERO(&set);
  70         FD_SET(s->fd, &set);
  71         tv.tv_sec = tv.tv_usec = 0;
  72         if (select(FD_SETSIZE, &set, NULL, NULL, &tv) > 0)
  73                 return 1;
  74         else
  75                 return 0;
  76 }
  77
  78 struct ipx_driver *driver = &ipx_win;
  79
  80 ubyte * ipx_get_my_server_address()
  81 {
  82         return (ubyte *)&ipx_network;
  83 }
  84
  85 ubyte * ipx_get_my_local_address()
  86 {
  87         return (ubyte *)(ipx_MyAddress + 4);
  88 }
  89
  90 void arch_ipx_set_driver(int ipx_driver)
  91 {
  92         switch(ipx_driver) {
  93         case IPX_DRIVER_IPX: driver = &ipx_win; break;
  94         case IPX_DRIVER_UDP: driver = &ipx_udp; break;
  95         case IPX_DRIVER_MCAST4: driver = &ipx_mcast4; break;
  96         default: Int3();
  97         }
  98 }
  99
 100 int ipx_init(int socket_number)
 101 {
 102         int i;
 103
 104         WORD wVersionRequested;
 105         WSADATA wsaData;
 106
 107         wVersionRequested = MAKEWORD(2, 0);
 108         if (WSAStartup( wVersionRequested, &wsaData))
 109         {
 110           return IPX_SOCKET_ALREADY_OPEN;
 111         }
 112
 113 #if 0
 114         if ( LOBYTE( wsaData.wVersion ) != 2 ||
 115           HIBYTE( wsaData.wVersion ) != 0 ) {
 116            /* We couldn't find a usable WinSock DLL. */
 117            WSACleanup( );
 118            return IPX_SOCKET_TABLE_FULL;
 119         }
 120 #endif
 121
 122         if ((i = FindArg("-ipxnetwork")) && Args[i + 1]) {
 123                 unsigned long n = strtol(Args[i + 1], NULL, 16);
 124                 ipx_MyAddress[0] = (unsigned char)n >> 24; ipx_MyAddress[1] = (unsigned char)(n >> 16) & 255;
 125                 ipx_MyAddress[2] = (unsigned char)(n >> 8) & 255; ipx_MyAddress[3] = (unsigned char)n & 255;
 126                 printf("IPX: Using network %08x\n", (int) n);
 127         }
 128         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 129                 return IPX_NOT_INSTALLED;
 130         }
 131         driver->GetMyAddress();
 132         memcpy(&ipx_network, ipx_MyAddress, 4);
 133         Ipx_num_networks = 0;
 134         memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
 135         ipx_installed = 1;
 136         atexit(ipx_close);
 137         printf("ipx succesfully installed\n");
 138         return IPX_INIT_OK;
 139 }
 140
 141 void ipx_close()
 142 {
 143         if (ipx_installed) {
 144                 WSACleanup();
 145                 driver->CloseSocket(&ipx_socket_data);
 146         }
 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 = *(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         memcpy(ipx_header.Destination.Network, network, 4);
 188         memcpy(ipx_header.Destination.Node, immediate_address, 6);
 189         *(u_short *)ipx_header.Destination.Socket = htons(ipx_socket_data.socket);
 190         ipx_header.PacketType = 4; /* Packet Exchange */
 191         *(uint *)buf = ipx_packetnum++;
 192         memcpy(buf + 4, data, datasize);
 193         driver->SendPacket(&ipx_socket_data, &ipx_header, buf, datasize + 4);
 194 }
 195
 196 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 197 {
 198         // let's hope Linux knows how to route it
 199         memcpy( local_target, node, 6 );
 200 }
 201
 202 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
 203 {
 204         int i, j;
 205         ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 206         ubyte local_address[6];
 207
 208         // Set to all networks besides mine
 209         for (i=0; i<Ipx_num_networks; i++ )     {
 210                 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) )      {
 211                         ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
 212                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
 213                 } else {
 214                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
 215                 }
 216         }
 217
 218         //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
 219
 220         // Send directly to all users not on my network or in the network list.
 221         for (i=0; i<Ipx_num_users; i++ )        {
 222                 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) )  {
 223                         for (j=0; j<Ipx_num_networks; j++ )             {
 224                                 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
 225                                         goto SkipUser;
 226                         }
 227                         ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
 228 SkipUser:
 229                         j = 0;
 230                 }
 231         }
 232 }
 233
 234 // Sends a non-localized packet... needs 4 byte server, 6 byte address
 235 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
 236 {
 237         ubyte local_address[6];
 238
 239         if ( (*(uint *)server) != 0 )   {
 240                 ipx_get_local_target( server, address, local_address );
 241                 ipx_send_packet_data( data, datasize, server, address, local_address );
 242         } else {
 243                 // Old method, no server info.
 244                 ipx_send_packet_data( data, datasize, server, address, address );
 245         }
 246 }
 247
 248 int ipx_change_default_socket( ushort socket_number )
 249 {
 250         if ( !ipx_installed ) return -3;
 251
 252         driver->CloseSocket(&ipx_socket_data);
 253         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 254                 return -3;
 255         }
 256         return 0;
 257 }
 258
 259 void ipx_read_user_file(char * filename)
 260 {
 261         FILE * fp;
 262         user_address tmp;
 263         char temp_line[132], *p1;
 264         int n, ln=0, x;
 265
 266         if (!filename) return;
 267
 268         Ipx_num_users = 0;
 269
 270         fp = fopen( filename, "rt" );
 271         if ( !fp ) return;
 272
 273         printf( "Broadcast Users:\n" );
 274
 275         while (fgets(temp_line, 132, fp)) {
 276                 ln++;
 277                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 278                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 279 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 280                 if (strlen(temp_line) >= 21 && temp_line[8] == '/') {
 281                         for (n = 0; n < 4; n++) {
 282                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 283                                         break;
 284                                 tmp.network[n] = x;
 285                         }
 286                         if (n != 4)
 287                                 continue;
 288                         for (n = 0; n < 6; n++) {
 289                                 if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)
 290                                         break;
 291                                 tmp.node[n] = x;
 292                         }
 293                         if (n != 6)
 294                                 continue;
 295                 } else
 296                         continue;
 297 #else
 298                 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] );
 299                 if ( n != 10 ) continue;
 300 #endif
 301                 if ( Ipx_num_users < MAX_USERS )        {
 302                         ubyte * ipx_real_buffer = (ubyte *)&tmp;
 303                         ipx_get_local_target( tmp.network, tmp.node, tmp.address );
 304                         Ipx_users[Ipx_num_users++] = tmp;
 305                         printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 306                         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] );
 307                 } else {
 308                         printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
 309                         fclose(fp);
 310                         return;
 311                 }
 312         }
 313         fclose(fp);
 314 }
 315
 316
 317 void ipx_read_network_file(char * filename)
 318 {
 319         FILE * fp;
 320         user_address tmp;
 321         char temp_line[132], *p1;
 322         int i, n, ln=0, x;
 323
 324         if (!filename) return;
 325
 326         fp = fopen( filename, "rt" );
 327         if ( !fp ) return;
 328
 329         printf( "Using Networks:\n" );
 330         for (i=0; i<Ipx_num_networks; i++ )             {
 331                 ubyte * n1 = (ubyte *)&Ipx_networks[i];
 332                 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
 333         }
 334
 335         while (fgets(temp_line, 132, fp)) {
 336                 ln++;
 337                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 338                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 339 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 340                 if (strlen(temp_line) >= 8) {
 341                         for (n = 0; n < 4; n++) {
 342                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 343                                         break;
 344                                 tmp.network[n] = x;
 345                         }
 346                         if (n != 4)
 347                                 continue;
 348                 } else
 349                         continue;
 350 #else
 351                 n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
 352                 if ( n != 4 ) continue;
 353 #endif
 354                 if ( Ipx_num_networks < MAX_NETWORKS  ) {
 355                         int j;
 356                         for (j=0; j<Ipx_num_networks; j++ )
 357                                 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
 358                                         break;
 359                         if ( j >= Ipx_num_networks )    {
 360                                 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
 361                                 printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
 362                         }
 363                 } else {
 364                         printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
 365                         fclose(fp);
 366                         return;
 367                 }
 368         }
 369         fclose(fp);
 370 }
 371
 372 // Initalizes the protocol-specific member of the netgame packet.
 373 void ipx_init_netgame_aux_data(ubyte buf[])
 374 {
 375         if(driver->InitNetgameAuxData)
 376                 driver->InitNetgameAuxData(&ipx_socket_data, buf);
 377 }
 378
 379 // Handles the protocol-specific member of the netgame packet.
 380 int ipx_handle_netgame_aux_data(const ubyte buf[])
 381 {
 382         if(driver->HandleNetgameAuxData)
 383                 return driver->HandleNetgameAuxData(&ipx_socket_data, buf);
 384         return 0;
 385 }
 386
 387 // Notifies the protocol that we're done with a particular game
 388 void ipx_handle_leave_game()
 389 {
 390         if(driver->HandleLeaveGame)
 391                 driver->HandleLeaveGame(&ipx_socket_data);
 392 }
 393
 394 // Send a packet to every member of the game.
 395 int ipx_send_game_packet(ubyte *data, int datasize)
 396 {
 397         if(driver->SendGamePacket) {
 398                 u_char buf[MAX_IPX_DATA];
 399
 400                 *(uint *)buf = ipx_packetnum++;
 401                 memcpy(buf + 4, data, datasize);
 402                 *(uint *)data = ipx_packetnum++;
 403                 return driver->SendGamePacket(&ipx_socket_data, buf, datasize + 4);
 404         } else {
 405                 // Loop through all the players unicasting the packet.
 406                 int i;
 407
 408                 //printf("Sending game packet: N_players = %i\n", N_players);
 409
 410                 for(i=0; i<N_players; i++) {
 411                         if(Players[i].connected && (i != Player_num))
 412                                 ipx_send_packet_data(data, datasize, NetPlayers.players[i].network.ipx.server, NetPlayers.players[i].network.ipx.node,Players[i].net_address);
 413                 }
 414                 return datasize;
 415         }
 416
 417         return 0;
 418 }