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