arch/linux/linuxnet.c

   1 /* $Id: linuxnet.c,v 1.9 2003-08-02 07:32:59 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  * Linux net
  18  *
  19  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include <conf.h>
  23 #endif
  24
  25 #ifdef NETWORK
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <sys/types.h>
  30 #include <sys/time.h>
  31 #include <netinet/in.h> /* for htons & co. */
  32
  33 #include "pstypes.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 #include "byteswap.h"
  44
  45 #define MAX_IPX_DATA 576
  46
  47 int ipx_fd;
  48 ipx_socket_t ipx_socket_data;
  49 ubyte ipx_installed=0;
  50 ushort ipx_socket = 0;
  51 uint ipx_network = 0;
  52 ubyte ipx_MyAddress[10];
  53 int ipx_packetnum = 0;                  /* Sequence number */
  54 //int     ipx_packettotal=0,ipx_lastspeed=0;
  55
  56 /* User defined routing stuff */
  57 typedef struct user_address {
  58         ubyte network[4];
  59         ubyte node[6];
  60         ubyte address[6];
  61 } user_address;
  62 #define MAX_USERS 64
  63 int Ipx_num_users = 0;
  64 user_address Ipx_users[MAX_USERS];
  65
  66 #define MAX_NETWORKS 64
  67 int Ipx_num_networks = 0;
  68 uint Ipx_networks[MAX_NETWORKS];
  69
  70 void ipx_close(void);
  71
  72 int ipx_general_PacketReady(ipx_socket_t *s) {
  73         fd_set set;
  74         struct timeval tv;
  75
  76         FD_ZERO(&set);
  77         FD_SET(s->fd, &set);
  78         tv.tv_sec = tv.tv_usec = 0;
  79         if (select(s->fd + 1, &set, NULL, NULL, &tv) > 0)
  80                 return 1;
  81         else
  82                 return 0;
  83 }
  84
  85 struct ipx_driver *driver = &ipx_bsd;
  86
  87 ubyte * ipx_get_my_server_address()
  88 {
  89         return (ubyte *)&ipx_network;
  90 }
  91
  92 ubyte * ipx_get_my_local_address()
  93 {
  94         return (ubyte *)(ipx_MyAddress + 4);
  95 }
  96
  97 //---------------------------------------------------------------
  98 // Initializes all IPX internals.
  99 // If socket_number==0, then opens next available socket.
 100 // Returns:     0  if successful.
 101 //                              -1 if socket already open.
 102 //                              -2      if socket table full.
 103 //                              -3 if IPX not installed.
 104 //                              -4 if couldn't allocate low dos memory
 105 //                              -5 if error with getting internetwork address
 106 int ipx_init( int socket_number, int show_address )
 107 {
 108         int i;
 109
 110         if (FindArg("-kali")) {
 111                 printf("Using Kali for network games\n");
 112                 driver = &ipx_kali;
 113 //added on 12/20/98 by Jan Kratochvil for direct TCP/IP games
 114         } else if (FindArg("-udp")) {
 115                 printf("Using native TCP/IP (UDP) for network games\n");
 116                 driver = &ipx_udp;
 117 //end this section addition - JK
 118         } else {
 119                 printf("Using real IPX for network games\n");
 120                 driver = &ipx_bsd;
 121         }
 122         if ((i = FindArg("-ipxnetwork")) && Args[i + 1]) {
 123                 unsigned long n = strtol(Args[i + 1], NULL, 16);
 124                 ipx_MyAddress[0] = n >> 24; ipx_MyAddress[1] = (n >> 16) & 255;
 125                 ipx_MyAddress[2] = (n >> 8) & 255; ipx_MyAddress[3] = n & 255;
 126                 printf("IPX: Using network %08x\n", (unsigned 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         return 0;
 138 }
 139
 140 void ipx_close()
 141 {
 142         if (ipx_installed)
 143                 driver->CloseSocket(&ipx_socket_data);
 144         ipx_installed = 0;
 145 }
 146
 147 int ipx_get_packet_data( ubyte * data )
 148 {
 149         struct ipx_recv_data rd;
 150         char buf[MAX_IPX_DATA];
 151 //killed 6-15-99 to get rid of compile warnings - OE
 152 //      uint best_id = 0;
 153 //      uint pkt_num;
 154 //end kill - OE
 155         int size;
 156         int best_size = 0;
 157 //edited 04/12/99 Matt Mueller - duh, we don't want to throw all that data away!
 158         //--killed-- Like the original, only take latest packet, throw away rest
 159         //do _NOT_ throw them away!
 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 //--killed--                 pkt_num = INTEL_INT(*(uint *)buf);
 167 //--killed--                 if (pkt_num >= best_id) {
 168                         memcpy(data, buf + 4, size - 4);
 169                                 return size-4;
 170 //--killed--                    best_id = pkt_num;
 171 //--killed--                    best_size = size - 4;
 172 //--killed--                 }
 173 //end edit -MM
 174                 }
 175         }
 176         return best_size;
 177 }
 178
 179 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
 180 {
 181         u_char buf[MAX_IPX_DATA];
 182         IPXPacket_t ipx_header;
 183
 184         memcpy(ipx_header.Destination.Network, network, 4);
 185         memcpy(ipx_header.Destination.Node, immediate_address, 6);
 186         *(u_short *)ipx_header.Destination.Socket = htons(ipx_socket_data.socket);
 187         ipx_header.PacketType = 4; /* Packet Exchange */
 188         *(uint *)buf = INTEL_INT(ipx_packetnum);
 189         ipx_packetnum++;
 190     //ipx_packettotal+=datasize+4;
 191     //if (f2i(Players[Player_num].time_level) && (f2i(Players[Player_num].time_level)%10!=ipx_lastspeed))
 192         //{
 193         //   ipx_lastspeed=f2i(Players[Player_num].time_level)%10;
 194         //   printf("tot=%i,t2=%i,time=%i,avg=%i,a2=%i\n",ipx_packetnum,ipx_packettotal,(int)f2i(Players[Player_num].time_level),
 195         //          ipx_packetnum/(int)f2i(Players[Player_num].time_level),
 196         //          ipx_packettotal/(int)f2i(Players[Player_num].time_level));
 197         //}
 198         memcpy(buf + 4, data, datasize);
 199         driver->SendPacket(&ipx_socket_data, &ipx_header, buf, datasize + 4);
 200 }
 201
 202 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 203 {
 204         // let's hope Linux knows how to route it
 205         memcpy( local_target, node, 6 );
 206 }
 207
 208 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
 209 {
 210         int i, j;
 211         ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 212         ubyte local_address[6];
 213
 214         // Set to all networks besides mine
 215         for (i=0; i<Ipx_num_networks; i++ )     {
 216                 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) )      {
 217                         ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
 218                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
 219                 } else {
 220                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
 221                 }
 222         }
 223
 224         //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
 225
 226         // Send directly to all users not on my network or in the network list.
 227         for (i=0; i<Ipx_num_users; i++ )        {
 228                 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) )  {
 229                         for (j=0; j<Ipx_num_networks; j++ )             {
 230                                 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
 231                                         goto SkipUser;
 232                         }
 233                         ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
 234 SkipUser:
 235                         j = 0;
 236                 }
 237         }
 238 }
 239
 240 // Sends a non-localized packet... needs 4 byte server, 6 byte address
 241 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
 242 {
 243         ubyte local_address[6];
 244
 245         if ( (*(uint *)server) != 0 )   {
 246                 ipx_get_local_target( server, address, local_address );
 247                 ipx_send_packet_data( data, datasize, server, address, local_address );
 248         } else {
 249                 // Old method, no server info.
 250                 ipx_send_packet_data( data, datasize, server, address, address );
 251         }
 252 }
 253
 254 int ipx_change_default_socket( ushort socket_number )
 255 {
 256         if ( !ipx_installed ) return -3;
 257
 258         driver->CloseSocket(&ipx_socket_data);
 259         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 260                 return -3;
 261         }
 262         return 0;
 263 }
 264
 265 void ipx_read_user_file(char * filename)
 266 {
 267         FILE * fp;
 268         user_address tmp;
 269         char temp_line[132], *p1;
 270         int n, ln=0, x;
 271
 272         if (!filename) return;
 273
 274         Ipx_num_users = 0;
 275
 276         fp = fopen( filename, "rt" );
 277         if ( !fp ) return;
 278
 279         printf( "Broadcast Users:\n" );
 280
 281         while (fgets(temp_line, 132, fp)) {
 282                 ln++;
 283                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 284                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 285 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 286                 if (strlen(temp_line) >= 21 && temp_line[8] == '/') {
 287                         for (n = 0; n < 4; n++) {
 288                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 289                                         break;
 290                                 tmp.network[n] = x;
 291                         }
 292                         if (n != 4)
 293                                 continue;
 294                         for (n = 0; n < 6; n++) {
 295                                 if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)
 296                                         break;
 297                                 tmp.node[n] = x;
 298                         }
 299                         if (n != 6)
 300                                 continue;
 301                 } else
 302                         continue;
 303 #else
 304                 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] );
 305                 if ( n != 10 ) continue;
 306 #endif
 307                 if ( Ipx_num_users < MAX_USERS )        {
 308                         ubyte * ipx_real_buffer = (ubyte *)&tmp;
 309                         ipx_get_local_target( tmp.network, tmp.node, tmp.address );
 310                         Ipx_users[Ipx_num_users++] = tmp;
 311                         printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 312                         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] );
 313                 } else {
 314                         printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
 315                         fclose(fp);
 316                         return;
 317                 }
 318         }
 319         fclose(fp);
 320 }
 321
 322
 323 void ipx_read_network_file(char * filename)
 324 {
 325         FILE * fp;
 326         user_address tmp;
 327         char temp_line[132], *p1;
 328         int i, n, ln=0, x;
 329
 330         if (!filename) return;
 331
 332         fp = fopen( filename, "rt" );
 333         if ( !fp ) return;
 334
 335         printf( "Using Networks:\n" );
 336         for (i=0; i<Ipx_num_networks; i++ )             {
 337                 ubyte * n1 = (ubyte *)&Ipx_networks[i];
 338                 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
 339         }
 340
 341         while (fgets(temp_line, 132, fp)) {
 342                 ln++;
 343                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 344                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 345 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 346                 if (strlen(temp_line) >= 8) {
 347                         for (n = 0; n < 4; n++) {
 348                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 349                                         break;
 350                                 tmp.network[n] = x;
 351                         }
 352                         if (n != 4)
 353                                 continue;
 354                 } else
 355                         continue;
 356 #else
 357                 n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
 358                 if ( n != 4 ) continue;
 359 #endif
 360                 if ( Ipx_num_networks < MAX_NETWORKS  ) {
 361                         int j;
 362                         for (j=0; j<Ipx_num_networks; j++ )
 363                                 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
 364                                         break;
 365                         if ( j >= Ipx_num_networks )    {
 366                                 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
 367                                 printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
 368                         }
 369                 } else {
 370                         printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
 371                         fclose(fp);
 372                         return;
 373                 }
 374         }
 375         fclose(fp);
 376 }
 377 #endif //NETWORK