arch/linux/linuxnet.c

   1 /* $Id: linuxnet.c,v 1.8 2003-03-19 23:20:09 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 #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         if (FindArg("-kali")) {
 109                 printf("Using Kali for network games\n");
 110                 driver = &ipx_kali;
 111 //added on 12/20/98 by Jan Kratochvil for direct TCP/IP games
 112         } else if (FindArg("-udp")) {
 113                 printf("Using native TCP/IP (UDP) for network games\n");
 114                 driver = &ipx_udp;
 115 //end this section addition - JK
 116         } else {
 117                 printf("Using real IPX for network games\n");
 118                 driver = &ipx_bsd;
 119         }
 120         if ((i = FindArg("-ipxnetwork")) && Args[i + 1]) {
 121                 unsigned long n = strtol(Args[i + 1], NULL, 16);
 122                 ipx_MyAddress[0] = n >> 24; ipx_MyAddress[1] = (n >> 16) & 255;
 123                 ipx_MyAddress[2] = (n >> 8) & 255; ipx_MyAddress[3] = n & 255;
 124                 printf("IPX: Using network %08x\n", (unsigned int)n);
 125         }
 126         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 127                 return -3;
 128         }
 129         driver->GetMyAddress();
 130         memcpy(&ipx_network, ipx_MyAddress, 4);
 131         Ipx_num_networks = 0;
 132         memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
 133         ipx_installed = 1;
 134         atexit(ipx_close);
 135         return 0;
 136 }
 137
 138 void ipx_close()
 139 {
 140         if (ipx_installed)
 141                 driver->CloseSocket(&ipx_socket_data);
 142         ipx_installed = 0;
 143 }
 144
 145 int ipx_get_packet_data( ubyte * data )
 146 {
 147         struct ipx_recv_data rd;
 148         char buf[MAX_IPX_DATA];
 149 //killed 6-15-99 to get rid of compile warnings - OE
 150 //      uint best_id = 0;
 151 //      uint pkt_num;
 152 //end kill - OE
 153         int size;
 154         int best_size = 0;
 155 //edited 04/12/99 Matt Mueller - duh, we don't want to throw all that data away!
 156         //--killed-- Like the original, only take latest packet, throw away rest
 157         //do _NOT_ throw them away!
 158         while (driver->PacketReady(&ipx_socket_data)) {
 159                 if ((size =
 160                      driver->ReceivePacket(&ipx_socket_data, buf,
 161                       sizeof(buf), &rd)) > 4) {
 162                      if (!memcmp(rd.src_network, ipx_MyAddress, 10))
 163                         continue;       /* don't get own pkts */
 164 //--killed--                 pkt_num = *(uint *)buf;
 165 //--killed--                 if (pkt_num >= best_id) {
 166                         memcpy(data, buf + 4, size - 4);
 167                                 return size-4;
 168 //--killed--                    best_id = pkt_num;
 169 //--killed--                    best_size = size - 4;
 170 //--killed--                 }
 171 //end edit -MM
 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     //ipx_packettotal+=datasize+4;
 188     //if (f2i(Players[Player_num].time_level) && (f2i(Players[Player_num].time_level)%10!=ipx_lastspeed))
 189         //{
 190         //   ipx_lastspeed=f2i(Players[Player_num].time_level)%10;
 191         //   printf("tot=%i,t2=%i,time=%i,avg=%i,a2=%i\n",ipx_packetnum,ipx_packettotal,(int)f2i(Players[Player_num].time_level),
 192         //          ipx_packetnum/(int)f2i(Players[Player_num].time_level),
 193         //          ipx_packettotal/(int)f2i(Players[Player_num].time_level));
 194         //}
 195         memcpy(buf + 4, data, datasize);
 196         driver->SendPacket(&ipx_socket_data, &ipx_header, buf, datasize + 4);
 197 }
 198
 199 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 200 {
 201         // let's hope Linux knows how to route it
 202         memcpy( local_target, node, 6 );
 203 }
 204
 205 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
 206 {
 207         int i, j;
 208         ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 209         ubyte local_address[6];
 210
 211         // Set to all networks besides mine
 212         for (i=0; i<Ipx_num_networks; i++ )     {
 213                 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) )      {
 214                         ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
 215                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
 216                 } else {
 217                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
 218                 }
 219         }
 220
 221         //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
 222
 223         // Send directly to all users not on my network or in the network list.
 224         for (i=0; i<Ipx_num_users; i++ )        {
 225                 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) )  {
 226                         for (j=0; j<Ipx_num_networks; j++ )             {
 227                                 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
 228                                         goto SkipUser;
 229                         }
 230                         ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
 231 SkipUser:
 232                         j = 0;
 233                 }
 234         }
 235 }
 236
 237 // Sends a non-localized packet... needs 4 byte server, 6 byte address
 238 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
 239 {
 240         ubyte local_address[6];
 241
 242         if ( (*(uint *)server) != 0 )   {
 243                 ipx_get_local_target( server, address, local_address );
 244                 ipx_send_packet_data( data, datasize, server, address, local_address );
 245         } else {
 246                 // Old method, no server info.
 247                 ipx_send_packet_data( data, datasize, server, address, address );
 248         }
 249 }
 250
 251 int ipx_change_default_socket( ushort socket_number )
 252 {
 253         if ( !ipx_installed ) return -3;
 254
 255         driver->CloseSocket(&ipx_socket_data);
 256         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 257                 return -3;
 258         }
 259         return 0;
 260 }
 261
 262 void ipx_read_user_file(char * filename)
 263 {
 264         FILE * fp;
 265         user_address tmp;
 266         char temp_line[132], *p1;
 267         int n, ln=0, x;
 268
 269         if (!filename) return;
 270
 271         Ipx_num_users = 0;
 272
 273         fp = fopen( filename, "rt" );
 274         if ( !fp ) return;
 275
 276         printf( "Broadcast Users:\n" );
 277
 278         while (fgets(temp_line, 132, fp)) {
 279                 ln++;
 280                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 281                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 282 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 283                 if (strlen(temp_line) >= 21 && temp_line[8] == '/') {
 284                         for (n = 0; n < 4; n++) {
 285                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 286                                         break;
 287                                 tmp.network[n] = x;
 288                         }
 289                         if (n != 4)
 290                                 continue;
 291                         for (n = 0; n < 6; n++) {
 292                                 if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)
 293                                         break;
 294                                 tmp.node[n] = x;
 295                         }
 296                         if (n != 6)
 297                                 continue;
 298                 } else
 299                         continue;
 300 #else
 301                 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] );
 302                 if ( n != 10 ) continue;
 303 #endif
 304                 if ( Ipx_num_users < MAX_USERS )        {
 305                         ubyte * ipx_real_buffer = (ubyte *)&tmp;
 306                         ipx_get_local_target( tmp.network, tmp.node, tmp.address );
 307                         Ipx_users[Ipx_num_users++] = tmp;
 308                         printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 309                         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] );
 310                 } else {
 311                         printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
 312                         fclose(fp);
 313                         return;
 314                 }
 315         }
 316         fclose(fp);
 317 }
 318
 319
 320 void ipx_read_network_file(char * filename)
 321 {
 322         FILE * fp;
 323         user_address tmp;
 324         char temp_line[132], *p1;
 325         int i, n, ln=0, x;
 326
 327         if (!filename) return;
 328
 329         fp = fopen( filename, "rt" );
 330         if ( !fp ) return;
 331
 332         printf( "Using Networks:\n" );
 333         for (i=0; i<Ipx_num_networks; i++ )             {
 334                 ubyte * n1 = (ubyte *)&Ipx_networks[i];
 335                 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
 336         }
 337
 338         while (fgets(temp_line, 132, fp)) {
 339                 ln++;
 340                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 341                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 342 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 343                 if (strlen(temp_line) >= 8) {
 344                         for (n = 0; n < 4; n++) {
 345                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 346                                         break;
 347                                 tmp.network[n] = x;
 348                         }
 349                         if (n != 4)
 350                                 continue;
 351                 } else
 352                         continue;
 353 #else
 354                 n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
 355                 if ( n != 4 ) continue;
 356 #endif
 357                 if ( Ipx_num_networks < MAX_NETWORKS  ) {
 358                         int j;
 359                         for (j=0; j<Ipx_num_networks; j++ )
 360                                 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
 361                                         break;
 362                         if ( j >= Ipx_num_networks )    {
 363                                 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
 364                                 printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
 365                         }
 366                 } else {
 367                         printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
 368                         fclose(fp);
 369                         return;
 370                 }
 371         }
 372         fclose(fp);
 373 }
 374 #endif //NETWORK