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 #include <stdlib.h>
  14 #include <stdio.h>
  15 #include <string.h>
  16 #include <winsock.h>
  17
  18 #include "types.h"
  19 #include "config.h"
  20 #include "args.h"
  21
  22 #include "ipx_drv.h"
  23
  24 extern struct ipx_driver ipx_win;
  25
  26 #define MAX_IPX_DATA 576
  27
  28 int ipx_fd;
  29 ipx_socket_t ipx_socket_data;
  30 ubyte ipx_installed=0;
  31 ushort ipx_socket = 0;
  32 uint ipx_network = 0;
  33 ubyte ipx_MyAddress[10];
  34 int ipx_packetnum = 0;                  /* Sequence number */
  35
  36 /* User defined routing stuff */
  37 typedef struct user_address {
  38         ubyte network[4];
  39         ubyte node[6];
  40         ubyte address[6];
  41 } user_address;
  42 #define MAX_USERS 64
  43 int Ipx_num_users = 0;
  44 user_address Ipx_users[MAX_USERS];
  45
  46 #define MAX_NETWORKS 64
  47 int Ipx_num_networks = 0;
  48 uint Ipx_networks[MAX_NETWORKS];
  49
  50 void ipx_close(void);
  51
  52 int ipx_general_PacketReady(ipx_socket_t *s) {
  53         fd_set set;
  54         struct timeval tv;
  55
  56         FD_ZERO(&set);
  57         FD_SET(s->fd, &set);
  58         tv.tv_sec = tv.tv_usec = 0;
  59         if (select(FD_SETSIZE, &set, NULL, NULL, &tv) > 0)
  60                 return 1;
  61         else
  62                 return 0;
  63 }
  64
  65 struct ipx_driver *driver = &ipx_win;
  66
  67 ubyte * ipx_get_my_server_address()
  68 {
  69         return (ubyte *)&ipx_network;
  70 }
  71
  72 ubyte * ipx_get_my_local_address()
  73 {
  74         return (ubyte *)(ipx_MyAddress + 4);
  75 }
  76
  77 //---------------------------------------------------------------
  78 // Initializes all IPX internals.
  79 // If socket_number==0, then opens next available socket.
  80 // Returns:     0  if successful.
  81 //                              -1 if socket already open.
  82 //                              -2      if socket table full.
  83 //                              -3 if IPX not installed.
  84 //                              -4 if couldn't allocate low dos memory
  85 //                              -5 if error with getting internetwork address
  86 int ipx_init( int socket_number, int show_address )
  87 {
  88         int i;
  89
  90         WORD wVersionRequested;
  91         WSADATA wsaData;
  92
  93         wVersionRequested = MAKEWORD(2, 0);
  94         if (WSAStartup( wVersionRequested, &wsaData))
  95         {
  96           return -1;
  97         }
  98
  99 #if 0
 100         if ( LOBYTE( wsaData.wVersion ) != 2 ||
 101           HIBYTE( wsaData.wVersion ) != 0 ) {
 102            /* We couldn't find a usable WinSock DLL. */
 103            WSACleanup( );
 104            return -2;
 105         }
 106 #endif
 107
 108         printf("Using real IPX for network games\n");
 109         driver = &ipx_win;
 110         if ((i = FindArg("-ipxnetwork")) && Args[i + 1]) {
 111                 unsigned long n = strtol(Args[i + 1], NULL, 16);
 112                 ipx_MyAddress[0] = (unsigned char)n >> 24; ipx_MyAddress[1] = (unsigned char)(n >> 16) & 255;
 113                 ipx_MyAddress[2] = (unsigned char)(n >> 8) & 255; ipx_MyAddress[3] = (unsigned char)n & 255;
 114                 printf("IPX: Using network %08x\n", (int) n);
 115         }
 116         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 117                 return -3;
 118         }
 119         driver->GetMyAddress();
 120         memcpy(&ipx_network, ipx_MyAddress, 4);
 121         Ipx_num_networks = 0;
 122         memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
 123         ipx_installed = 1;
 124         atexit(ipx_close);
 125         printf("ipx succesfully installed\n");
 126         return 0;
 127 }
 128
 129 void ipx_close()
 130 {
 131         if (ipx_installed) {
 132                 WSACleanup();
 133                 driver->CloseSocket(&ipx_socket_data);
 134         }
 135         ipx_installed = 0;
 136 }
 137
 138 int ipx_get_packet_data( ubyte * data )
 139 {
 140         struct ipx_recv_data rd;
 141         char buf[MAX_IPX_DATA];
 142         uint best_id = 0;
 143         uint pkt_num;
 144         int size;
 145         int best_size = 0;
 146
 147         // Like the original, only take latest packet, throw away rest
 148         while (driver->PacketReady(&ipx_socket_data)) {
 149                 if ((size =
 150                      driver->ReceivePacket(&ipx_socket_data, buf,
 151                       sizeof(buf), &rd)) > 4) {
 152                      if (!memcmp(rd.src_network, ipx_MyAddress, 10))
 153                         continue;       /* don't get own pkts */
 154                      pkt_num = *(uint *)buf;
 155                      if (pkt_num >= best_id) {
 156                         memcpy(data, buf + 4, size - 4);
 157                         best_id = pkt_num;
 158                         best_size = size - 4;
 159                      }
 160                 }
 161         }
 162         return best_size;
 163 }
 164
 165 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
 166 {
 167         u_char buf[MAX_IPX_DATA];
 168         IPXPacket_t ipx_header;
 169
 170         memcpy(ipx_header.Destination.Network, network, 4);
 171         memcpy(ipx_header.Destination.Node, immediate_address, 6);
 172         *(u_short *)ipx_header.Destination.Socket = htons(ipx_socket_data.socket);
 173         ipx_header.PacketType = 4; /* Packet Exchange */
 174         *(uint *)buf = ipx_packetnum++;
 175         memcpy(buf + 4, data, datasize);
 176         driver->SendPacket(&ipx_socket_data, &ipx_header, buf, datasize + 4);
 177 }
 178
 179 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 180 {
 181         // let's hope Linux knows how to route it
 182         memcpy( local_target, node, 6 );
 183 }
 184
 185 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
 186 {
 187         int i, j;
 188         ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 189         ubyte local_address[6];
 190
 191         // Set to all networks besides mine
 192         for (i=0; i<Ipx_num_networks; i++ )     {
 193                 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) )      {
 194                         ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
 195                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
 196                 } else {
 197                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
 198                 }
 199         }
 200
 201         //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
 202
 203         // Send directly to all users not on my network or in the network list.
 204         for (i=0; i<Ipx_num_users; i++ )        {
 205                 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) )  {
 206                         for (j=0; j<Ipx_num_networks; j++ )             {
 207                                 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
 208                                         goto SkipUser;
 209                         }
 210                         ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
 211 SkipUser:
 212                         j = 0;
 213                 }
 214         }
 215 }
 216
 217 // Sends a non-localized packet... needs 4 byte server, 6 byte address
 218 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
 219 {
 220         ubyte local_address[6];
 221
 222         if ( (*(uint *)server) != 0 )   {
 223                 ipx_get_local_target( server, address, local_address );
 224                 ipx_send_packet_data( data, datasize, server, address, local_address );
 225         } else {
 226                 // Old method, no server info.
 227                 ipx_send_packet_data( data, datasize, server, address, address );
 228         }
 229 }
 230
 231 int ipx_change_default_socket( ushort socket_number )
 232 {
 233         if ( !ipx_installed ) return -3;
 234
 235         driver->CloseSocket(&ipx_socket_data);
 236         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 237                 return -3;
 238         }
 239         return 0;
 240 }
 241
 242 void ipx_read_user_file(char * filename)
 243 {
 244         FILE * fp;
 245         user_address tmp;
 246         char temp_line[132], *p1;
 247         int n, ln=0, x;
 248
 249         if (!filename) return;
 250
 251         Ipx_num_users = 0;
 252
 253         fp = fopen( filename, "rt" );
 254         if ( !fp ) return;
 255
 256         printf( "Broadcast Users:\n" );
 257
 258         while (fgets(temp_line, 132, fp)) {
 259                 ln++;
 260                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 261                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 262 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 263                 if (strlen(temp_line) >= 21 && temp_line[8] == '/') {
 264                         for (n = 0; n < 4; n++) {
 265                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 266                                         break;
 267                                 tmp.network[n] = x;
 268                         }
 269                         if (n != 4)
 270                                 continue;
 271                         for (n = 0; n < 6; n++) {
 272                                 if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)
 273                                         break;
 274                                 tmp.node[n] = x;
 275                         }
 276                         if (n != 6)
 277                                 continue;
 278                 } else
 279                         continue;
 280 #else
 281                 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] );
 282                 if ( n != 10 ) continue;
 283 #endif
 284                 if ( Ipx_num_users < MAX_USERS )        {
 285                         ubyte * ipx_real_buffer = (ubyte *)&tmp;
 286                         ipx_get_local_target( tmp.network, tmp.node, tmp.address );
 287                         Ipx_users[Ipx_num_users++] = tmp;
 288                         printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 289                         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] );
 290                 } else {
 291                         printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
 292                         fclose(fp);
 293                         return;
 294                 }
 295         }
 296         fclose(fp);
 297 }
 298
 299
 300 void ipx_read_network_file(char * filename)
 301 {
 302         FILE * fp;
 303         user_address tmp;
 304         char temp_line[132], *p1;
 305         int i, n, ln=0, x;
 306
 307         if (!filename) return;
 308
 309         fp = fopen( filename, "rt" );
 310         if ( !fp ) return;
 311
 312         printf( "Using Networks:\n" );
 313         for (i=0; i<Ipx_num_networks; i++ )             {
 314                 ubyte * n1 = (ubyte *)&Ipx_networks[i];
 315                 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
 316         }
 317
 318         while (fgets(temp_line, 132, fp)) {
 319                 ln++;
 320                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 321                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 322 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 323                 if (strlen(temp_line) >= 8) {
 324                         for (n = 0; n < 4; n++) {
 325                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 326                                         break;
 327                                 tmp.network[n] = x;
 328                         }
 329                         if (n != 4)
 330                                 continue;
 331                 } else
 332                         continue;
 333 #else
 334                 n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
 335                 if ( n != 4 ) continue;
 336 #endif
 337                 if ( Ipx_num_networks < MAX_NETWORKS  ) {
 338                         int j;
 339                         for (j=0; j<Ipx_num_networks; j++ )
 340                                 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
 341                                         break;
 342                         if ( j >= Ipx_num_networks )    {
 343                                 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
 344                                 printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
 345                         }
 346                 } else {
 347                         printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
 348                         fclose(fp);
 349                         return;
 350                 }
 351         }
 352         fclose(fp);
 353 }