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 net
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include <conf.h>
  22 #endif
  23
  24 #ifdef NETWORK
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <sys/types.h>
  29 #include <sys/time.h>
  30 #include <netinet/in.h> /* for htons & co. */
  31
  32 #include "pstypes.h"
  33 #include "config.h"
  34 #include "args.h"
  35
  36 #include "ipx_drv.h"
  37 #include "ipx_bsd.h"
  38 #include "ipx_kali.h"
  39 #include "ipx_udp.h"
  40 //added 05/17/99 Matt Mueller - needed to redefine FD_* so that no asm is used
  41 //#include "checker.h"
  42 //end addition -MM
  43 #define MAX_IPX_DATA 576
  44
  45 int ipx_fd;
  46 ipx_socket_t ipx_socket_data;
  47 ubyte ipx_installed=0;
  48 ushort ipx_socket = 0;
  49 uint ipx_network = 0;
  50 ubyte ipx_MyAddress[10];
  51 int ipx_packetnum = 0;                  /* Sequence number */
  52 //int     ipx_packettotal=0,ipx_lastspeed=0;
  53
  54 /* User defined routing stuff */
  55 typedef struct user_address {
  56         ubyte network[4];
  57         ubyte node[6];
  58         ubyte address[6];
  59 } user_address;
  60 #define MAX_USERS 64
  61 int Ipx_num_users = 0;
  62 user_address Ipx_users[MAX_USERS];
  63
  64 #define MAX_NETWORKS 64
  65 int Ipx_num_networks = 0;
  66 uint Ipx_networks[MAX_NETWORKS];
  67
  68 void ipx_close(void);
  69
  70 int ipx_general_PacketReady(ipx_socket_t *s) {
  71         fd_set set;
  72         struct timeval tv;
  73
  74         FD_ZERO(&set);
  75         FD_SET(s->fd, &set);
  76         tv.tv_sec = tv.tv_usec = 0;
  77         if (select(s->fd + 1, &set, NULL, NULL, &tv) > 0)
  78                 return 1;
  79         else
  80                 return 0;
  81 }
  82
  83 struct ipx_driver *driver = &ipx_bsd;
  84
  85 ubyte * ipx_get_my_server_address()
  86 {
  87         return (ubyte *)&ipx_network;
  88 }
  89
  90 ubyte * ipx_get_my_local_address()
  91 {
  92         return (ubyte *)(ipx_MyAddress + 4);
  93 }
  94
  95 //---------------------------------------------------------------
  96 // Initializes all IPX internals.
  97 // If socket_number==0, then opens next available socket.
  98 // Returns:     0  if successful.
  99 //                              -1 if socket already open.
 100 //                              -2      if socket table full.
 101 //                              -3 if IPX not installed.
 102 //                              -4 if couldn't allocate low dos memory
 103 //                              -5 if error with getting internetwork address
 104 int ipx_init( int socket_number, int show_address )
 105 {
 106         int i;
 107
 108 /* DPH: killed kali for now
 109         if (FindArg("-kali")) {
 110                 printf("Using Kali for network games\n");
 111                 driver = &ipx_kali;
 112 //added on 12/20/98 by Jan Kratochvil for direct TCP/IP games
 113         } else*/ if (FindArg("-udp")) {
 114                 printf("Using native TCP/IP (UDP) for network games\n");
 115                 driver = &ipx_udp;
 116 //end this section addition - JK
 117         } else {
 118                 printf("Using real IPX for network games\n");
 119                 driver = &ipx_bsd;
 120         }
 121         if ((i = FindArg("-ipxnetwork")) && Args[i + 1]) {
 122                 unsigned long n = strtol(Args[i + 1], NULL, 16);
 123                 ipx_MyAddress[0] = n >> 24; ipx_MyAddress[1] = (n >> 16) & 255;
 124                 ipx_MyAddress[2] = (n >> 8) & 255; ipx_MyAddress[3] = n & 255;
 125                 printf("IPX: Using network %08x\n", (unsigned int)n);
 126         }
 127         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 128                 return -3;
 129         }
 130         driver->GetMyAddress();
 131         memcpy(&ipx_network, ipx_MyAddress, 4);
 132         Ipx_num_networks = 0;
 133         memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
 134         ipx_installed = 1;
 135         atexit(ipx_close);
 136         return 0;
 137 }
 138
 139 void ipx_close()
 140 {
 141         if (ipx_installed)
 142                 driver->CloseSocket(&ipx_socket_data);
 143         ipx_installed = 0;
 144 }
 145
 146 int ipx_get_packet_data( ubyte * data )
 147 {
 148         struct ipx_recv_data rd;
 149         char buf[MAX_IPX_DATA];
 150 //killed 6-15-99 to get rid of compile warnings - OE
 151 //      uint best_id = 0;
 152 //      uint pkt_num;
 153 //end kill - OE
 154         int size;
 155         int best_size = 0;
 156 //edited 04/12/99 Matt Mueller - duh, we don't want to throw all that data away!
 157         //--killed-- Like the original, only take latest packet, throw away rest
 158         //do _NOT_ throw them away!
 159         while (driver->PacketReady(&ipx_socket_data)) {
 160                 if ((size =
 161                      driver->ReceivePacket(&ipx_socket_data, buf,
 162                       sizeof(buf), &rd)) > 4) {
 163                      if (!memcmp(rd.src_network, ipx_MyAddress, 10))
 164                         continue;       /* don't get own pkts */
 165 //--killed--                 pkt_num = *(uint *)buf;
 166 //--killed--                 if (pkt_num >= best_id) {
 167                         memcpy(data, buf + 4, size - 4);
 168                                 return size-4;
 169 //--killed--                    best_id = pkt_num;
 170 //--killed--                    best_size = size - 4;
 171 //--killed--                 }
 172 //end edit -MM
 173                 }
 174         }
 175         return best_size;
 176 }
 177
 178 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
 179 {
 180         u_char buf[MAX_IPX_DATA];
 181         IPXPacket_t ipx_header;
 182
 183         memcpy(ipx_header.Destination.Network, network, 4);
 184         memcpy(ipx_header.Destination.Node, immediate_address, 6);
 185         *(u_short *)ipx_header.Destination.Socket = htons(ipx_socket_data.socket);
 186         ipx_header.PacketType = 4; /* Packet Exchange */
 187         *(uint *)buf = ipx_packetnum++;
 188     //ipx_packettotal+=datasize+4;
 189     //if (f2i(Players[Player_num].time_level) && (f2i(Players[Player_num].time_level)%10!=ipx_lastspeed))
 190         //{
 191         //   ipx_lastspeed=f2i(Players[Player_num].time_level)%10;
 192         //   printf("tot=%i,t2=%i,time=%i,avg=%i,a2=%i\n",ipx_packetnum,ipx_packettotal,(int)f2i(Players[Player_num].time_level),
 193         //          ipx_packetnum/(int)f2i(Players[Player_num].time_level),
 194         //          ipx_packettotal/(int)f2i(Players[Player_num].time_level));
 195         //}
 196         memcpy(buf + 4, data, datasize);
 197         driver->SendPacket(&ipx_socket_data, &ipx_header, buf, datasize + 4);
 198 }
 199
 200 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 201 {
 202         // let's hope Linux knows how to route it
 203         memcpy( local_target, node, 6 );
 204 }
 205
 206 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
 207 {
 208         int i, j;
 209         ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 210         ubyte local_address[6];
 211
 212         // Set to all networks besides mine
 213         for (i=0; i<Ipx_num_networks; i++ )     {
 214                 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) )      {
 215                         ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
 216                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
 217                 } else {
 218                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
 219                 }
 220         }
 221
 222         //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
 223
 224         // Send directly to all users not on my network or in the network list.
 225         for (i=0; i<Ipx_num_users; i++ )        {
 226                 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) )  {
 227                         for (j=0; j<Ipx_num_networks; j++ )             {
 228                                 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
 229                                         goto SkipUser;
 230                         }
 231                         ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
 232 SkipUser:
 233                         j = 0;
 234                 }
 235         }
 236 }
 237
 238 // Sends a non-localized packet... needs 4 byte server, 6 byte address
 239 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
 240 {
 241         ubyte local_address[6];
 242
 243         if ( (*(uint *)server) != 0 )   {
 244                 ipx_get_local_target( server, address, local_address );
 245                 ipx_send_packet_data( data, datasize, server, address, local_address );
 246         } else {
 247                 // Old method, no server info.
 248                 ipx_send_packet_data( data, datasize, server, address, address );
 249         }
 250 }
 251
 252 int ipx_change_default_socket( ushort socket_number )
 253 {
 254         if ( !ipx_installed ) return -3;
 255
 256         driver->CloseSocket(&ipx_socket_data);
 257         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 258                 return -3;
 259         }
 260         return 0;
 261 }
 262
 263 void ipx_read_user_file(char * filename)
 264 {
 265         FILE * fp;
 266         user_address tmp;
 267         char temp_line[132], *p1;
 268         int n, ln=0, x;
 269
 270         if (!filename) return;
 271
 272         Ipx_num_users = 0;
 273
 274         fp = fopen( filename, "rt" );
 275         if ( !fp ) return;
 276
 277         printf( "Broadcast Users:\n" );
 278
 279         while (fgets(temp_line, 132, fp)) {
 280                 ln++;
 281                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 282                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 283 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 284                 if (strlen(temp_line) >= 21 && temp_line[8] == '/') {
 285                         for (n = 0; n < 4; n++) {
 286                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 287                                         break;
 288                                 tmp.network[n] = x;
 289                         }
 290                         if (n != 4)
 291                                 continue;
 292                         for (n = 0; n < 6; n++) {
 293                                 if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)
 294                                         break;
 295                                 tmp.node[n] = x;
 296                         }
 297                         if (n != 6)
 298                                 continue;
 299                 } else
 300                         continue;
 301 #else
 302                 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] );
 303                 if ( n != 10 ) continue;
 304 #endif
 305                 if ( Ipx_num_users < MAX_USERS )        {
 306                         ubyte * ipx_real_buffer = (ubyte *)&tmp;
 307                         ipx_get_local_target( tmp.network, tmp.node, tmp.address );
 308                         Ipx_users[Ipx_num_users++] = tmp;
 309                         printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 310                         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] );
 311                 } else {
 312                         printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
 313                         fclose(fp);
 314                         return;
 315                 }
 316         }
 317         fclose(fp);
 318 }
 319
 320
 321 void ipx_read_network_file(char * filename)
 322 {
 323         FILE * fp;
 324         user_address tmp;
 325         char temp_line[132], *p1;
 326         int i, n, ln=0, x;
 327
 328         if (!filename) return;
 329
 330         fp = fopen( filename, "rt" );
 331         if ( !fp ) return;
 332
 333         printf( "Using Networks:\n" );
 334         for (i=0; i<Ipx_num_networks; i++ )             {
 335                 ubyte * n1 = (ubyte *)&Ipx_networks[i];
 336                 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
 337         }
 338
 339         while (fgets(temp_line, 132, fp)) {
 340                 ln++;
 341                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 342                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 343 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 344                 if (strlen(temp_line) >= 8) {
 345                         for (n = 0; n < 4; n++) {
 346                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 347                                         break;
 348                                 tmp.network[n] = x;
 349                         }
 350                         if (n != 4)
 351                                 continue;
 352                 } else
 353                         continue;
 354 #else
 355                 n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
 356                 if ( n != 4 ) continue;
 357 #endif
 358                 if ( Ipx_num_networks < MAX_NETWORKS  ) {
 359                         int j;
 360                         for (j=0; j<Ipx_num_networks; j++ )
 361                                 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
 362                                         break;
 363                         if ( j >= Ipx_num_networks )    {
 364                                 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
 365                                 printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
 366                         }
 367                 } else {
 368                         printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
 369                         fclose(fp);
 370                         return;
 371                 }
 372         }
 373         fclose(fp);
 374 }
 375 #endif //NETWORK