arch/win32/winnet.c

   1 /* $Id: winnet.c,v 1.4 2002-08-31 03:16:35 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 net
  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 "pstypes.h"
  31 #include "config.h"
  32 #include "args.h"
  33
  34 #include "ipx_drv.h"
  35
  36 extern struct ipx_driver ipx_win;
  37
  38 #define MAX_IPX_DATA 576
  39
  40 int ipx_fd;
  41 ipx_socket_t ipx_socket_data;
  42 ubyte ipx_installed=0;
  43 ushort ipx_socket = 0;
  44 uint ipx_network = 0;
  45 ubyte ipx_MyAddress[10];
  46 int ipx_packetnum = 0;                  /* Sequence number */
  47
  48 /* User defined routing stuff */
  49 typedef struct user_address {
  50         ubyte network[4];
  51         ubyte node[6];
  52         ubyte address[6];
  53 } user_address;
  54 #define MAX_USERS 64
  55 int Ipx_num_users = 0;
  56 user_address Ipx_users[MAX_USERS];
  57
  58 #define MAX_NETWORKS 64
  59 int Ipx_num_networks = 0;
  60 uint Ipx_networks[MAX_NETWORKS];
  61
  62 void ipx_close(void);
  63
  64 int ipx_general_PacketReady(ipx_socket_t *s) {
  65         fd_set set;
  66         struct timeval tv;
  67
  68         FD_ZERO(&set);
  69         FD_SET(s->fd, &set);
  70         tv.tv_sec = tv.tv_usec = 0;
  71         if (select(FD_SETSIZE, &set, NULL, NULL, &tv) > 0)
  72                 return 1;
  73         else
  74                 return 0;
  75 }
  76
  77 struct ipx_driver *driver = &ipx_win;
  78
  79 ubyte * ipx_get_my_server_address()
  80 {
  81         return (ubyte *)&ipx_network;
  82 }
  83
  84 ubyte * ipx_get_my_local_address()
  85 {
  86         return (ubyte *)(ipx_MyAddress + 4);
  87 }
  88
  89 //---------------------------------------------------------------
  90 // Initializes all IPX internals.
  91 // If socket_number==0, then opens next available socket.
  92 // Returns:     0  if successful.
  93 //                              -1 if socket already open.
  94 //                              -2      if socket table full.
  95 //                              -3 if IPX not installed.
  96 //                              -4 if couldn't allocate low dos memory
  97 //                              -5 if error with getting internetwork address
  98 int ipx_init( int socket_number, int show_address )
  99 {
 100         int i;
 101
 102         WORD wVersionRequested;
 103         WSADATA wsaData;
 104
 105         wVersionRequested = MAKEWORD(2, 0);
 106         if (WSAStartup( wVersionRequested, &wsaData))
 107         {
 108           return -1;
 109         }
 110
 111 #if 0
 112         if ( LOBYTE( wsaData.wVersion ) != 2 ||
 113           HIBYTE( wsaData.wVersion ) != 0 ) {
 114            /* We couldn't find a usable WinSock DLL. */
 115            WSACleanup( );
 116            return -2;
 117         }
 118 #endif
 119
 120         printf("Using real IPX for network games\n");
 121         driver = &ipx_win;
 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 -3;
 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 0;
 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         uint best_id = 0;
 155         uint pkt_num;
 156         int size;
 157         int best_size = 0;
 158
 159         // Like the original, only take latest packet, throw away rest
 160         while (driver->PacketReady(&ipx_socket_data)) {
 161                 if ((size =
 162                      driver->ReceivePacket(&ipx_socket_data, buf,
 163                       sizeof(buf), &rd)) > 4) {
 164                      if (!memcmp(rd.src_network, ipx_MyAddress, 10))
 165                         continue;       /* don't get own pkts */
 166                      pkt_num = *(uint *)buf;
 167                      if (pkt_num >= best_id) {
 168                         memcpy(data, buf + 4, size - 4);
 169                         best_id = pkt_num;
 170                         best_size = size - 4;
 171                      }
 172                 }
 173         }
 174         return best_size;
 175 }
 176
 177 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
 178 {
 179         u_char buf[MAX_IPX_DATA];
 180         IPXPacket_t ipx_header;
 181
 182         memcpy(ipx_header.Destination.Network, network, 4);
 183         memcpy(ipx_header.Destination.Node, immediate_address, 6);
 184         *(u_short *)ipx_header.Destination.Socket = htons(ipx_socket_data.socket);
 185         ipx_header.PacketType = 4; /* Packet Exchange */
 186         *(uint *)buf = ipx_packetnum++;
 187         memcpy(buf + 4, data, datasize);
 188         driver->SendPacket(&ipx_socket_data, &ipx_header, buf, datasize + 4);
 189 }
 190
 191 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 192 {
 193         // let's hope Linux knows how to route it
 194         memcpy( local_target, node, 6 );
 195 }
 196
 197 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
 198 {
 199         int i, j;
 200         ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 201         ubyte local_address[6];
 202
 203         // Set to all networks besides mine
 204         for (i=0; i<Ipx_num_networks; i++ )     {
 205                 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) )      {
 206                         ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
 207                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
 208                 } else {
 209                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
 210                 }
 211         }
 212
 213         //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
 214
 215         // Send directly to all users not on my network or in the network list.
 216         for (i=0; i<Ipx_num_users; i++ )        {
 217                 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) )  {
 218                         for (j=0; j<Ipx_num_networks; j++ )             {
 219                                 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
 220                                         goto SkipUser;
 221                         }
 222                         ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
 223 SkipUser:
 224                         j = 0;
 225                 }
 226         }
 227 }
 228
 229 // Sends a non-localized packet... needs 4 byte server, 6 byte address
 230 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
 231 {
 232         ubyte local_address[6];
 233
 234         if ( (*(uint *)server) != 0 )   {
 235                 ipx_get_local_target( server, address, local_address );
 236                 ipx_send_packet_data( data, datasize, server, address, local_address );
 237         } else {
 238                 // Old method, no server info.
 239                 ipx_send_packet_data( data, datasize, server, address, address );
 240         }
 241 }
 242
 243 int ipx_change_default_socket( ushort socket_number )
 244 {
 245         if ( !ipx_installed ) return -3;
 246
 247         driver->CloseSocket(&ipx_socket_data);
 248         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 249                 return -3;
 250         }
 251         return 0;
 252 }
 253
 254 void ipx_read_user_file(char * filename)
 255 {
 256         FILE * fp;
 257         user_address tmp;
 258         char temp_line[132], *p1;
 259         int n, ln=0, x;
 260
 261         if (!filename) return;
 262
 263         Ipx_num_users = 0;
 264
 265         fp = fopen( filename, "rt" );
 266         if ( !fp ) return;
 267
 268         printf( "Broadcast Users:\n" );
 269
 270         while (fgets(temp_line, 132, fp)) {
 271                 ln++;
 272                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 273                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 274 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 275                 if (strlen(temp_line) >= 21 && temp_line[8] == '/') {
 276                         for (n = 0; n < 4; n++) {
 277                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 278                                         break;
 279                                 tmp.network[n] = x;
 280                         }
 281                         if (n != 4)
 282                                 continue;
 283                         for (n = 0; n < 6; n++) {
 284                                 if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)
 285                                         break;
 286                                 tmp.node[n] = x;
 287                         }
 288                         if (n != 6)
 289                                 continue;
 290                 } else
 291                         continue;
 292 #else
 293                 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] );
 294                 if ( n != 10 ) continue;
 295 #endif
 296                 if ( Ipx_num_users < MAX_USERS )        {
 297                         ubyte * ipx_real_buffer = (ubyte *)&tmp;
 298                         ipx_get_local_target( tmp.network, tmp.node, tmp.address );
 299                         Ipx_users[Ipx_num_users++] = tmp;
 300                         printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 301                         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] );
 302                 } else {
 303                         printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
 304                         fclose(fp);
 305                         return;
 306                 }
 307         }
 308         fclose(fp);
 309 }
 310
 311
 312 void ipx_read_network_file(char * filename)
 313 {
 314         FILE * fp;
 315         user_address tmp;
 316         char temp_line[132], *p1;
 317         int i, n, ln=0, x;
 318
 319         if (!filename) return;
 320
 321         fp = fopen( filename, "rt" );
 322         if ( !fp ) return;
 323
 324         printf( "Using Networks:\n" );
 325         for (i=0; i<Ipx_num_networks; i++ )             {
 326                 ubyte * n1 = (ubyte *)&Ipx_networks[i];
 327                 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
 328         }
 329
 330         while (fgets(temp_line, 132, fp)) {
 331                 ln++;
 332                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 333                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 334 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 335                 if (strlen(temp_line) >= 8) {
 336                         for (n = 0; n < 4; n++) {
 337                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 338                                         break;
 339                                 tmp.network[n] = x;
 340                         }
 341                         if (n != 4)
 342                                 continue;
 343                 } else
 344                         continue;
 345 #else
 346                 n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
 347                 if ( n != 4 ) continue;
 348 #endif
 349                 if ( Ipx_num_networks < MAX_NETWORKS  ) {
 350                         int j;
 351                         for (j=0; j<Ipx_num_networks; j++ )
 352                                 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
 353                                         break;
 354                         if ( j >= Ipx_num_networks )    {
 355                                 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
 356                                 printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
 357                         }
 358                 } else {
 359                         printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
 360                         fclose(fp);
 361                         return;
 362                 }
 363         }
 364         fclose(fp);
 365 }