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 #include <conf.h>
  14
  15 #ifdef NETWORK
  16 #include <stdlib.h>
  17 #include <stdio.h>
  18 #include <string.h>
  19 #include <sys/types.h>
  20 #include <sys/time.h>
  21 #include <netinet/in.h> /* for htons & co. */
  22
  23 #include "pstypes.h"
  24 #include "config.h"
  25 #include "args.h"
  26
  27 #include "ipx_drv.h"
  28 #include "ipx_bsd.h"
  29 #include "ipx_kali.h"
  30 #include "ipx_udp.h"
  31 //added 05/17/99 Matt Mueller - needed to redefine FD_* so that no asm is used
  32 //#include "checker.h"
  33 //end addition -MM
  34 #define MAX_IPX_DATA 576
  35
  36 int ipx_fd;
  37 ipx_socket_t ipx_socket_data;
  38 ubyte ipx_installed=0;
  39 ushort ipx_socket = 0;
  40 uint ipx_network = 0;
  41 ubyte ipx_MyAddress[10];
  42 int ipx_packetnum = 0;                  /* Sequence number */
  43 //int     ipx_packettotal=0,ipx_lastspeed=0;
  44
  45 /* User defined routing stuff */
  46 typedef struct user_address {
  47         ubyte network[4];
  48         ubyte node[6];
  49         ubyte address[6];
  50 } user_address;
  51 #define MAX_USERS 64
  52 int Ipx_num_users = 0;
  53 user_address Ipx_users[MAX_USERS];
  54
  55 #define MAX_NETWORKS 64
  56 int Ipx_num_networks = 0;
  57 uint Ipx_networks[MAX_NETWORKS];
  58
  59 void ipx_close(void);
  60
  61 int ipx_general_PacketReady(ipx_socket_t *s) {
  62         fd_set set;
  63         struct timeval tv;
  64
  65         FD_ZERO(&set);
  66         FD_SET(s->fd, &set);
  67         tv.tv_sec = tv.tv_usec = 0;
  68         if (select(s->fd + 1, &set, NULL, NULL, &tv) > 0)
  69                 return 1;
  70         else
  71                 return 0;
  72 }
  73
  74 struct ipx_driver *driver = &ipx_bsd;
  75
  76 ubyte * ipx_get_my_server_address()
  77 {
  78         return (ubyte *)&ipx_network;
  79 }
  80
  81 ubyte * ipx_get_my_local_address()
  82 {
  83         return (ubyte *)(ipx_MyAddress + 4);
  84 }
  85
  86 //---------------------------------------------------------------
  87 // Initializes all IPX internals.
  88 // If socket_number==0, then opens next available socket.
  89 // Returns:     0  if successful.
  90 //                              -1 if socket already open.
  91 //                              -2      if socket table full.
  92 //                              -3 if IPX not installed.
  93 //                              -4 if couldn't allocate low dos memory
  94 //                              -5 if error with getting internetwork address
  95 int ipx_init( int socket_number, int show_address )
  96 {
  97         int i;
  98
  99 /* DPH: killed kali for now
 100         if (args_find("-kali")) {
 101                 printf("Using Kali for network games\n");
 102                 driver = &ipx_kali;
 103 //added on 12/20/98 by Jan Kratochvil for direct TCP/IP games
 104         } else*/ if (args_find("-udp")) {
 105                 printf("Using native TCP/IP (UDP) for network games\n");
 106                 driver = &ipx_udp;
 107 //end this section addition - JK
 108         } else {
 109                 printf("Using real IPX for network games\n");
 110                 driver = &ipx_bsd;
 111         }
 112         if ((i = args_find("-ipxnetwork")) && Args[i + 1]) {
 113                 unsigned long n = strtol(Args[i + 1], NULL, 16);
 114                 ipx_MyAddress[0] = n >> 24; ipx_MyAddress[1] = (n >> 16) & 255;
 115                 ipx_MyAddress[2] = (n >> 8) & 255; ipx_MyAddress[3] = n & 255;
 116                 printf("IPX: Using network %08x\n", (unsigned int)n);
 117         }
 118         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 119                 return -3;
 120         }
 121         driver->GetMyAddress();
 122         memcpy(&ipx_network, ipx_MyAddress, 4);
 123         Ipx_num_networks = 0;
 124         memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
 125         ipx_installed = 1;
 126         atexit(ipx_close);
 127         return 0;
 128 }
 129
 130 void ipx_close()
 131 {
 132         if (ipx_installed)
 133                 driver->CloseSocket(&ipx_socket_data);
 134         ipx_installed = 0;
 135 }
 136
 137 int ipx_get_packet_data( ubyte * data )
 138 {
 139         struct ipx_recv_data rd;
 140         char buf[MAX_IPX_DATA];
 141 //killed 6-15-99 to get rid of compile warnings - OE
 142 //      uint best_id = 0;
 143 //      uint pkt_num;
 144 //end kill - OE
 145         int size;
 146         int best_size = 0;
 147 //edited 04/12/99 Matt Mueller - duh, we don't want to throw all that data away!
 148         //--killed-- Like the original, only take latest packet, throw away rest
 149         //do _NOT_ throw them away!
 150         while (driver->PacketReady(&ipx_socket_data)) {
 151                 if ((size =
 152                      driver->ReceivePacket(&ipx_socket_data, buf,
 153                       sizeof(buf), &rd)) > 4) {
 154                      if (!memcmp(rd.src_network, ipx_MyAddress, 10))
 155                         continue;       /* don't get own pkts */
 156 //--killed--                 pkt_num = *(uint *)buf;
 157 //--killed--                 if (pkt_num >= best_id) {
 158                         memcpy(data, buf + 4, size - 4);
 159                                 return size-4;
 160 //--killed--                    best_id = pkt_num;
 161 //--killed--                    best_size = size - 4;
 162 //--killed--                 }
 163 //end edit -MM
 164                 }
 165         }
 166         return best_size;
 167 }
 168
 169 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
 170 {
 171         u_char buf[MAX_IPX_DATA];
 172         IPXPacket_t ipx_header;
 173
 174         memcpy(ipx_header.Destination.Network, network, 4);
 175         memcpy(ipx_header.Destination.Node, immediate_address, 6);
 176         *(u_short *)ipx_header.Destination.Socket = htons(ipx_socket_data.socket);
 177         ipx_header.PacketType = 4; /* Packet Exchange */
 178         *(uint *)buf = ipx_packetnum++;
 179     //ipx_packettotal+=datasize+4;
 180     //if (f2i(Players[Player_num].time_level) && (f2i(Players[Player_num].time_level)%10!=ipx_lastspeed))
 181         //{
 182         //   ipx_lastspeed=f2i(Players[Player_num].time_level)%10;
 183         //   printf("tot=%i,t2=%i,time=%i,avg=%i,a2=%i\n",ipx_packetnum,ipx_packettotal,(int)f2i(Players[Player_num].time_level),
 184         //          ipx_packetnum/(int)f2i(Players[Player_num].time_level),
 185         //          ipx_packettotal/(int)f2i(Players[Player_num].time_level));
 186         //}
 187         memcpy(buf + 4, data, datasize);
 188         driver->SendPacket(&ipx_socket_data, &ipx_header, buf, datasize + 4);
 189 }
 190
 191 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 192 {
 193         // let's hope Linux knows how to route it
 194         memcpy( local_target, node, 6 );
 195 }
 196
 197 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
 198 {
 199         int i, j;
 200         ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 201         ubyte local_address[6];
 202
 203         // Set to all networks besides mine
 204         for (i=0; i<Ipx_num_networks; i++ )     {
 205                 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) )      {
 206                         ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
 207                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
 208                 } else {
 209                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
 210                 }
 211         }
 212
 213         //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
 214
 215         // Send directly to all users not on my network or in the network list.
 216         for (i=0; i<Ipx_num_users; i++ )        {
 217                 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) )  {
 218                         for (j=0; j<Ipx_num_networks; j++ )             {
 219                                 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
 220                                         goto SkipUser;
 221                         }
 222                         ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
 223 SkipUser:
 224                         j = 0;
 225                 }
 226         }
 227 }
 228
 229 // Sends a non-localized packet... needs 4 byte server, 6 byte address
 230 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
 231 {
 232         ubyte local_address[6];
 233
 234         if ( (*(uint *)server) != 0 )   {
 235                 ipx_get_local_target( server, address, local_address );
 236                 ipx_send_packet_data( data, datasize, server, address, local_address );
 237         } else {
 238                 // Old method, no server info.
 239                 ipx_send_packet_data( data, datasize, server, address, address );
 240         }
 241 }
 242
 243 int ipx_change_default_socket( ushort socket_number )
 244 {
 245         if ( !ipx_installed ) return -3;
 246
 247         driver->CloseSocket(&ipx_socket_data);
 248         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 249                 return -3;
 250         }
 251         return 0;
 252 }
 253
 254 void ipx_read_user_file(char * filename)
 255 {
 256         FILE * fp;
 257         user_address tmp;
 258         char temp_line[132], *p1;
 259         int n, ln=0, x;
 260
 261         if (!filename) return;
 262
 263         Ipx_num_users = 0;
 264
 265         fp = fopen( filename, "rt" );
 266         if ( !fp ) return;
 267
 268         printf( "Broadcast Users:\n" );
 269
 270         while (fgets(temp_line, 132, fp)) {
 271                 ln++;
 272                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 273                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 274 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 275                 if (strlen(temp_line) >= 21 && temp_line[8] == '/') {
 276                         for (n = 0; n < 4; n++) {
 277                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 278                                         break;
 279                                 tmp.network[n] = x;
 280                         }
 281                         if (n != 4)
 282                                 continue;
 283                         for (n = 0; n < 6; n++) {
 284                                 if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)
 285                                         break;
 286                                 tmp.node[n] = x;
 287                         }
 288                         if (n != 6)
 289                                 continue;
 290                 } else
 291                         continue;
 292 #else
 293                 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] );
 294                 if ( n != 10 ) continue;
 295 #endif
 296                 if ( Ipx_num_users < MAX_USERS )        {
 297                         ubyte * ipx_real_buffer = (ubyte *)&tmp;
 298                         ipx_get_local_target( tmp.network, tmp.node, tmp.address );
 299                         Ipx_users[Ipx_num_users++] = tmp;
 300                         printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 301                         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] );
 302                 } else {
 303                         printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
 304                         fclose(fp);
 305                         return;
 306                 }
 307         }
 308         fclose(fp);
 309 }
 310
 311
 312 void ipx_read_network_file(char * filename)
 313 {
 314         FILE * fp;
 315         user_address tmp;
 316         char temp_line[132], *p1;
 317         int i, n, ln=0, x;
 318
 319         if (!filename) return;
 320
 321         fp = fopen( filename, "rt" );
 322         if ( !fp ) return;
 323
 324         printf( "Using Networks:\n" );
 325         for (i=0; i<Ipx_num_networks; i++ )             {
 326                 ubyte * n1 = (ubyte *)&Ipx_networks[i];
 327                 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
 328         }
 329
 330         while (fgets(temp_line, 132, fp)) {
 331                 ln++;
 332                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 333                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 334 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 335                 if (strlen(temp_line) >= 8) {
 336                         for (n = 0; n < 4; n++) {
 337                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 338                                         break;
 339                                 tmp.network[n] = x;
 340                         }
 341                         if (n != 4)
 342                                 continue;
 343                 } else
 344                         continue;
 345 #else
 346                 n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
 347                 if ( n != 4 ) continue;
 348 #endif
 349                 if ( Ipx_num_networks < MAX_NETWORKS  ) {
 350                         int j;
 351                         for (j=0; j<Ipx_num_networks; j++ )
 352                                 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
 353                                         break;
 354                         if ( j >= Ipx_num_networks )    {
 355                                 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
 356                                 printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
 357                         }
 358                 } else {
 359                         printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
 360                         fclose(fp);
 361                         return;
 362                 }
 363         }
 364         fclose(fp);
 365 }
 366 #endif //NETWORK