arch/linux_net.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  * $Source: /cvs/cvsroot/d2x/arch/linux_net.c,v $
  16  * $Revision: 1.3 $
  17  * $Author: bradleyb $
  18  * $Date: 2001-01-29 13:35:09 $
  19  *
  20  * Linux net
  21  *
  22  * $Log: not supported by cvs2svn $
  23  */
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include <conf.h>
  27 #endif
  28
  29 #include <stdlib.h>
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <sys/types.h>
  33 #include <sys/time.h>
  34 #include <netinet/in.h> /* for htons & co. */
  35
  36 #include "pstypes.h"
  37 #include "config.h"
  38 #include "args.h"
  39
  40 #include "ipx_drv.h"
  41 #include "ipx_bsd.h"
  42 #include "ipx_kali.h"
  43 #include "ipx_udp.h"
  44 //added 05/17/99 Matt Mueller - needed to redefine FD_* so that no asm is used
  45 //#include "checker.h"
  46 //end addition -MM
  47 #define MAX_IPX_DATA 576
  48
  49 int ipx_fd;
  50 ipx_socket_t ipx_socket_data;
  51 ubyte ipx_installed=0;
  52 ushort ipx_socket = 0;
  53 uint ipx_network = 0;
  54 ubyte ipx_MyAddress[10];
  55 int ipx_packetnum = 0;                  /* Sequence number */
  56 //int     ipx_packettotal=0,ipx_lastspeed=0;
  57
  58 /* User defined routing stuff */
  59 typedef struct user_address {
  60         ubyte network[4];
  61         ubyte node[6];
  62         ubyte address[6];
  63 } user_address;
  64 #define MAX_USERS 64
  65 int Ipx_num_users = 0;
  66 user_address Ipx_users[MAX_USERS];
  67
  68 #define MAX_NETWORKS 64
  69 int Ipx_num_networks = 0;
  70 uint Ipx_networks[MAX_NETWORKS];
  71
  72 void ipx_close(void);
  73
  74 int ipx_general_PacketReady(ipx_socket_t *s) {
  75         fd_set set;
  76         struct timeval tv;
  77
  78         FD_ZERO(&set);
  79         FD_SET(s->fd, &set);
  80         tv.tv_sec = tv.tv_usec = 0;
  81         if (select(s->fd + 1, &set, NULL, NULL, &tv) > 0)
  82                 return 1;
  83         else
  84                 return 0;
  85 }
  86
  87 struct ipx_driver *driver = &ipx_bsd;
  88
  89 ubyte * ipx_get_my_server_address()
  90 {
  91         return (ubyte *)&ipx_network;
  92 }
  93
  94 ubyte * ipx_get_my_local_address()
  95 {
  96         return (ubyte *)(ipx_MyAddress + 4);
  97 }
  98
  99 //---------------------------------------------------------------
 100 // Initializes all IPX internals.
 101 // If socket_number==0, then opens next available socket.
 102 // Returns:     0  if successful.
 103 //                              -1 if socket already open.
 104 //                              -2      if socket table full.
 105 //                              -3 if IPX not installed.
 106 //                              -4 if couldn't allocate low dos memory
 107 //                              -5 if error with getting internetwork address
 108 int ipx_init( int socket_number, int show_address )
 109 {
 110         int i;
 111
 112 /* DPH: killed kali for now
 113         if (FindArg("-kali")) {
 114                 printf("Using Kali for network games\n");
 115                 driver = &ipx_kali;
 116 //added on 12/20/98 by Jan Kratochvil for direct TCP/IP games
 117         } else*/ if (FindArg("-udp")) {
 118                 printf("Using native TCP/IP (UDP) for network games\n");
 119                 driver = &ipx_udp;
 120 //end this section addition - JK
 121         } else {
 122                 printf("Using real IPX for network games\n");
 123                 driver = &ipx_bsd;
 124         }
 125         if ((i = FindArg("-ipxnetwork")) && Args[i + 1]) {
 126                 unsigned long n = strtol(Args[i + 1], NULL, 16);
 127                 ipx_MyAddress[0] = n >> 24; ipx_MyAddress[1] = (n >> 16) & 255;
 128                 ipx_MyAddress[2] = (n >> 8) & 255; ipx_MyAddress[3] = n & 255;
 129                 printf("IPX: Using network %08x\n", (unsigned int)n);
 130         }
 131         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 132                 return -3;
 133         }
 134         driver->GetMyAddress();
 135         memcpy(&ipx_network, ipx_MyAddress, 4);
 136         Ipx_num_networks = 0;
 137         memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
 138         ipx_installed = 1;
 139         atexit(ipx_close);
 140         return 0;
 141 }
 142
 143 void ipx_close()
 144 {
 145         if (ipx_installed)
 146                 driver->CloseSocket(&ipx_socket_data);
 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 //killed 6-15-99 to get rid of compile warnings - OE
 155 //      uint best_id = 0;
 156 //      uint pkt_num;
 157 //end kill - OE
 158         int size;
 159         int best_size = 0;
 160 //edited 04/12/99 Matt Mueller - duh, we don't want to throw all that data away!
 161         //--killed-- Like the original, only take latest packet, throw away rest
 162         //do _NOT_ throw them away!
 163         while (driver->PacketReady(&ipx_socket_data)) {
 164                 if ((size =
 165                      driver->ReceivePacket(&ipx_socket_data, buf,
 166                       sizeof(buf), &rd)) > 4) {
 167                      if (!memcmp(rd.src_network, ipx_MyAddress, 10))
 168                         continue;       /* don't get own pkts */
 169 //--killed--                 pkt_num = *(uint *)buf;
 170 //--killed--                 if (pkt_num >= best_id) {
 171                         memcpy(data, buf + 4, size - 4);
 172                                 return size-4;
 173 //--killed--                    best_id = pkt_num;
 174 //--killed--                    best_size = size - 4;
 175 //--killed--                 }
 176 //end edit -MM
 177                 }
 178         }
 179         return best_size;
 180 }
 181
 182 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
 183 {
 184         u_char buf[MAX_IPX_DATA];
 185         IPXPacket_t ipx_header;
 186
 187         memcpy(ipx_header.Destination.Network, network, 4);
 188         memcpy(ipx_header.Destination.Node, immediate_address, 6);
 189         *(u_short *)ipx_header.Destination.Socket = htons(ipx_socket_data.socket);
 190         ipx_header.PacketType = 4; /* Packet Exchange */
 191         *(uint *)buf = ipx_packetnum++;
 192     //ipx_packettotal+=datasize+4;
 193     //if (f2i(Players[Player_num].time_level) && (f2i(Players[Player_num].time_level)%10!=ipx_lastspeed))
 194         //{
 195         //   ipx_lastspeed=f2i(Players[Player_num].time_level)%10;
 196         //   printf("tot=%i,t2=%i,time=%i,avg=%i,a2=%i\n",ipx_packetnum,ipx_packettotal,(int)f2i(Players[Player_num].time_level),
 197         //          ipx_packetnum/(int)f2i(Players[Player_num].time_level),
 198         //          ipx_packettotal/(int)f2i(Players[Player_num].time_level));
 199         //}
 200         memcpy(buf + 4, data, datasize);
 201         driver->SendPacket(&ipx_socket_data, &ipx_header, buf, datasize + 4);
 202 }
 203
 204 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 205 {
 206         // let's hope Linux knows how to route it
 207         memcpy( local_target, node, 6 );
 208 }
 209
 210 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
 211 {
 212         int i, j;
 213         ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 214         ubyte local_address[6];
 215
 216         // Set to all networks besides mine
 217         for (i=0; i<Ipx_num_networks; i++ )     {
 218                 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) )      {
 219                         ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
 220                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
 221                 } else {
 222                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
 223                 }
 224         }
 225
 226         //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
 227
 228         // Send directly to all users not on my network or in the network list.
 229         for (i=0; i<Ipx_num_users; i++ )        {
 230                 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) )  {
 231                         for (j=0; j<Ipx_num_networks; j++ )             {
 232                                 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
 233                                         goto SkipUser;
 234                         }
 235                         ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
 236 SkipUser:
 237                         j = 0;
 238                 }
 239         }
 240 }
 241
 242 // Sends a non-localized packet... needs 4 byte server, 6 byte address
 243 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
 244 {
 245         ubyte local_address[6];
 246
 247         if ( (*(uint *)server) != 0 )   {
 248                 ipx_get_local_target( server, address, local_address );
 249                 ipx_send_packet_data( data, datasize, server, address, local_address );
 250         } else {
 251                 // Old method, no server info.
 252                 ipx_send_packet_data( data, datasize, server, address, address );
 253         }
 254 }
 255
 256 int ipx_change_default_socket( ushort socket_number )
 257 {
 258         if ( !ipx_installed ) return -3;
 259
 260         driver->CloseSocket(&ipx_socket_data);
 261         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 262                 return -3;
 263         }
 264         return 0;
 265 }
 266
 267 void ipx_read_user_file(char * filename)
 268 {
 269         FILE * fp;
 270         user_address tmp;
 271         char temp_line[132], *p1;
 272         int n, ln=0, x;
 273
 274         if (!filename) return;
 275
 276         Ipx_num_users = 0;
 277
 278         fp = fopen( filename, "rt" );
 279         if ( !fp ) return;
 280
 281         printf( "Broadcast Users:\n" );
 282
 283         while (fgets(temp_line, 132, fp)) {
 284                 ln++;
 285                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 286                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 287 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 288                 if (strlen(temp_line) >= 21 && temp_line[8] == '/') {
 289                         for (n = 0; n < 4; n++) {
 290                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 291                                         break;
 292                                 tmp.network[n] = x;
 293                         }
 294                         if (n != 4)
 295                                 continue;
 296                         for (n = 0; n < 6; n++) {
 297                                 if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)
 298                                         break;
 299                                 tmp.node[n] = x;
 300                         }
 301                         if (n != 6)
 302                                 continue;
 303                 } else
 304                         continue;
 305 #else
 306                 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] );
 307                 if ( n != 10 ) continue;
 308 #endif
 309                 if ( Ipx_num_users < MAX_USERS )        {
 310                         ubyte * ipx_real_buffer = (ubyte *)&tmp;
 311                         ipx_get_local_target( tmp.network, tmp.node, tmp.address );
 312                         Ipx_users[Ipx_num_users++] = tmp;
 313                         printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 314                         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] );
 315                 } else {
 316                         printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
 317                         fclose(fp);
 318                         return;
 319                 }
 320         }
 321         fclose(fp);
 322 }
 323
 324
 325 void ipx_read_network_file(char * filename)
 326 {
 327         FILE * fp;
 328         user_address tmp;
 329         char temp_line[132], *p1;
 330         int i, n, ln=0, x;
 331
 332         if (!filename) return;
 333
 334         fp = fopen( filename, "rt" );
 335         if ( !fp ) return;
 336
 337         printf( "Using Networks:\n" );
 338         for (i=0; i<Ipx_num_networks; i++ )             {
 339                 ubyte * n1 = (ubyte *)&Ipx_networks[i];
 340                 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
 341         }
 342
 343         while (fgets(temp_line, 132, fp)) {
 344                 ln++;
 345                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 346                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 347 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 348                 if (strlen(temp_line) >= 8) {
 349                         for (n = 0; n < 4; n++) {
 350                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 351                                         break;
 352                                 tmp.network[n] = x;
 353                         }
 354                         if (n != 4)
 355                                 continue;
 356                 } else
 357                         continue;
 358 #else
 359                 n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
 360                 if ( n != 4 ) continue;
 361 #endif
 362                 if ( Ipx_num_networks < MAX_NETWORKS  ) {
 363                         int j;
 364                         for (j=0; j<Ipx_num_networks; j++ )
 365                                 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
 366                                         break;
 367                         if ( j >= Ipx_num_networks )    {
 368                                 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
 369                                 printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
 370                         }
 371                 } else {
 372                         printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
 373                         fclose(fp);
 374                         return;
 375                 }
 376         }
 377         fclose(fp);
 378 }