arch/linux/linuxnet.c

   1 /* $Id: linuxnet.c,v 1.10 2003-10-03 07:58:14 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 lower-level network code.
  18  * implements functions declared in include/ipx.h
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <conf.h>
  24 #endif
  25
  26 #ifdef NETWORK
  27
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <unistd.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 "args.h"
  38 #include "error.h"
  39
  40 #include "ipx.h"
  41 #include "ipx_drv.h"
  42 #ifdef NATIVE_IPX
  43 #  include "ipx_bsd.h"
  44 #endif //NATIVE_IPX
  45 #include "ipx_kali.h"
  46 #include "ipx_udp.h"
  47 //added 05/17/99 Matt Mueller - needed to redefine FD_* so that no asm is used
  48 //#include "checker.h"
  49 //end addition -MM
  50 #include "byteswap.h"
  51
  52 #define MAX_IPX_DATA 576
  53
  54 int ipx_fd;
  55 ipx_socket_t ipx_socket_data;
  56 ubyte ipx_installed=0;
  57 ushort ipx_socket = 0;
  58 uint ipx_network = 0;
  59 ubyte ipx_MyAddress[10];
  60 int ipx_packetnum = 0;                  /* Sequence number */
  61 //int     ipx_packettotal=0,ipx_lastspeed=0;
  62
  63 /* User defined routing stuff */
  64 typedef struct user_address {
  65         ubyte network[4];
  66         ubyte node[6];
  67         ubyte address[6];
  68 } user_address;
  69 #define MAX_USERS 64
  70 int Ipx_num_users = 0;
  71 user_address Ipx_users[MAX_USERS];
  72
  73 #define MAX_NETWORKS 64
  74 int Ipx_num_networks = 0;
  75 uint Ipx_networks[MAX_NETWORKS];
  76
  77 int ipx_general_PacketReady(ipx_socket_t *s) {
  78         fd_set set;
  79         struct timeval tv;
  80
  81         FD_ZERO(&set);
  82         FD_SET(s->fd, &set);
  83         tv.tv_sec = tv.tv_usec = 0;
  84         if (select(s->fd + 1, &set, NULL, NULL, &tv) > 0)
  85                 return 1;
  86         else
  87                 return 0;
  88 }
  89
  90 struct ipx_driver *driver = &ipx_udp;
  91
  92 ubyte * ipx_get_my_server_address()
  93 {
  94         return (ubyte *)&ipx_network;
  95 }
  96
  97 ubyte * ipx_get_my_local_address()
  98 {
  99         return (ubyte *)(ipx_MyAddress + 4);
 100 }
 101
 102 void arch_ipx_set_driver(int ipx_driver)
 103 {
 104         switch(ipx_driver) {
 105 #ifdef NATIVE_IPX
 106         case IPX_DRIVER_IPX: driver = &ipx_bsd; break;
 107 #endif //NATIVE_IPX
 108         case IPX_DRIVER_KALI: driver = &ipx_kali; break;
 109         case IPX_DRIVER_UDP: driver = &ipx_udp; break;
 110         default: Int3();
 111         }
 112 }
 113
 114 int ipx_init(int socket_number)
 115 {
 116         int i;
 117
 118         if ((i = FindArg("-ipxnetwork")) && Args[i + 1]) {
 119                 unsigned long n = strtol(Args[i + 1], NULL, 16);
 120                 ipx_MyAddress[0] = n >> 24; ipx_MyAddress[1] = (n >> 16) & 255;
 121                 ipx_MyAddress[2] = (n >> 8) & 255; ipx_MyAddress[3] = n & 255;
 122                 printf("IPX: Using network %08x\n", (unsigned int)n);
 123         }
 124         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 125                 return IPX_NOT_INSTALLED;
 126         }
 127         driver->GetMyAddress();
 128         memcpy(&ipx_network, ipx_MyAddress, 4);
 129         Ipx_num_networks = 0;
 130         memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
 131         ipx_installed = 1;
 132         atexit(ipx_close);
 133         return IPX_INIT_OK;
 134 }
 135
 136 void ipx_close()
 137 {
 138         if (ipx_installed)
 139                 driver->CloseSocket(&ipx_socket_data);
 140         ipx_installed = 0;
 141 }
 142
 143 int ipx_get_packet_data( ubyte * data )
 144 {
 145         struct ipx_recv_data rd;
 146         char buf[MAX_IPX_DATA];
 147 //killed 6-15-99 to get rid of compile warnings - OE
 148 //      uint best_id = 0;
 149 //      uint pkt_num;
 150 //end kill - OE
 151         int size;
 152         int best_size = 0;
 153 //edited 04/12/99 Matt Mueller - duh, we don't want to throw all that data away!
 154         //--killed-- Like the original, only take latest packet, throw away rest
 155         //do _NOT_ throw them away!
 156         while (driver->PacketReady(&ipx_socket_data)) {
 157                 if ((size =
 158                      driver->ReceivePacket(&ipx_socket_data, buf,
 159                       sizeof(buf), &rd)) > 4) {
 160                      if (!memcmp(rd.src_network, ipx_MyAddress, 10))
 161                         continue;       /* don't get own pkts */
 162 //--killed--                 pkt_num = INTEL_INT(*(uint *)buf);
 163 //--killed--                 if (pkt_num >= best_id) {
 164                         memcpy(data, buf + 4, size - 4);
 165                                 return size-4;
 166 //--killed--                    best_id = pkt_num;
 167 //--killed--                    best_size = size - 4;
 168 //--killed--                 }
 169 //end edit -MM
 170                 }
 171         }
 172         return best_size;
 173 }
 174
 175 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
 176 {
 177         u_char buf[MAX_IPX_DATA];
 178         IPXPacket_t ipx_header;
 179
 180         memcpy(ipx_header.Destination.Network, network, 4);
 181         memcpy(ipx_header.Destination.Node, immediate_address, 6);
 182         *(u_short *)ipx_header.Destination.Socket = htons(ipx_socket_data.socket);
 183         ipx_header.PacketType = 4; /* Packet Exchange */
 184         *(uint *)buf = INTEL_INT(ipx_packetnum);
 185         ipx_packetnum++;
 186     //ipx_packettotal+=datasize+4;
 187     //if (f2i(Players[Player_num].time_level) && (f2i(Players[Player_num].time_level)%10!=ipx_lastspeed))
 188         //{
 189         //   ipx_lastspeed=f2i(Players[Player_num].time_level)%10;
 190         //   printf("tot=%i,t2=%i,time=%i,avg=%i,a2=%i\n",ipx_packetnum,ipx_packettotal,(int)f2i(Players[Player_num].time_level),
 191         //          ipx_packetnum/(int)f2i(Players[Player_num].time_level),
 192         //          ipx_packettotal/(int)f2i(Players[Player_num].time_level));
 193         //}
 194         memcpy(buf + 4, data, datasize);
 195         driver->SendPacket(&ipx_socket_data, &ipx_header, buf, datasize + 4);
 196 }
 197
 198 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 199 {
 200         // let's hope Linux knows how to route it
 201         memcpy( local_target, node, 6 );
 202 }
 203
 204 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
 205 {
 206         int i, j;
 207         ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 208         ubyte local_address[6];
 209
 210         // Set to all networks besides mine
 211         for (i=0; i<Ipx_num_networks; i++ )     {
 212                 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) )      {
 213                         ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
 214                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
 215                 } else {
 216                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
 217                 }
 218         }
 219
 220         //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
 221
 222         // Send directly to all users not on my network or in the network list.
 223         for (i=0; i<Ipx_num_users; i++ )        {
 224                 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) )  {
 225                         for (j=0; j<Ipx_num_networks; j++ )             {
 226                                 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
 227                                         goto SkipUser;
 228                         }
 229                         ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
 230 SkipUser:
 231                         j = 0;
 232                 }
 233         }
 234 }
 235
 236 // Sends a non-localized packet... needs 4 byte server, 6 byte address
 237 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
 238 {
 239         ubyte local_address[6];
 240
 241 #ifdef WORDS_NEED_ALIGNMENT
 242         int zero = 0;
 243         if (memcmp(server, &zero, 4)) {
 244 #else // WORDS_NEED_ALIGNMENT
 245         if ((*(uint *)server) != 0) {
 246 #endif // WORDS_NEED_ALIGNMENT
 247                 ipx_get_local_target( server, address, local_address );
 248                 ipx_send_packet_data( data, datasize, server, address, local_address );
 249         } else {
 250                 // Old method, no server info.
 251                 ipx_send_packet_data( data, datasize, server, address, address );
 252         }
 253 }
 254
 255 int ipx_change_default_socket( ushort socket_number )
 256 {
 257         if ( !ipx_installed ) return -3;
 258
 259         driver->CloseSocket(&ipx_socket_data);
 260         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 261                 return -3;
 262         }
 263         return 0;
 264 }
 265
 266 void ipx_read_user_file(char * filename)
 267 {
 268         FILE * fp;
 269         user_address tmp;
 270         char temp_line[132], *p1;
 271         int n, ln=0, x;
 272
 273         if (!filename) return;
 274
 275         Ipx_num_users = 0;
 276
 277         fp = fopen( filename, "rt" );
 278         if ( !fp ) return;
 279
 280         printf( "Broadcast Users:\n" );
 281
 282         while (fgets(temp_line, 132, fp)) {
 283                 ln++;
 284                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 285                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 286 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 287                 if (strlen(temp_line) >= 21 && temp_line[8] == '/') {
 288                         for (n = 0; n < 4; n++) {
 289                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 290                                         break;
 291                                 tmp.network[n] = x;
 292                         }
 293                         if (n != 4)
 294                                 continue;
 295                         for (n = 0; n < 6; n++) {
 296                                 if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)
 297                                         break;
 298                                 tmp.node[n] = x;
 299                         }
 300                         if (n != 6)
 301                                 continue;
 302                 } else
 303                         continue;
 304 #else
 305                 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] );
 306                 if ( n != 10 ) continue;
 307 #endif
 308                 if ( Ipx_num_users < MAX_USERS )        {
 309                         ubyte * ipx_real_buffer = (ubyte *)&tmp;
 310                         ipx_get_local_target( tmp.network, tmp.node, tmp.address );
 311                         Ipx_users[Ipx_num_users++] = tmp;
 312                         printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 313                         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] );
 314                 } else {
 315                         printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
 316                         fclose(fp);
 317                         return;
 318                 }
 319         }
 320         fclose(fp);
 321 }
 322
 323
 324 void ipx_read_network_file(char * filename)
 325 {
 326         FILE * fp;
 327         user_address tmp;
 328         char temp_line[132], *p1;
 329         int i, n, ln=0, x;
 330
 331         if (!filename) return;
 332
 333         fp = fopen( filename, "rt" );
 334         if ( !fp ) return;
 335
 336         printf( "Using Networks:\n" );
 337         for (i=0; i<Ipx_num_networks; i++ )             {
 338                 ubyte * n1 = (ubyte *)&Ipx_networks[i];
 339                 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
 340         }
 341
 342         while (fgets(temp_line, 132, fp)) {
 343                 ln++;
 344                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 345                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 346 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 347                 if (strlen(temp_line) >= 8) {
 348                         for (n = 0; n < 4; n++) {
 349                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 350                                         break;
 351                                 tmp.network[n] = x;
 352                         }
 353                         if (n != 4)
 354                                 continue;
 355                 } else
 356                         continue;
 357 #else
 358                 n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
 359                 if ( n != 4 ) continue;
 360 #endif
 361                 if ( Ipx_num_networks < MAX_NETWORKS  ) {
 362                         int j;
 363                         for (j=0; j<Ipx_num_networks; j++ )
 364                                 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
 365                                         break;
 366                         if ( j >= Ipx_num_networks )    {
 367                                 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
 368                                 printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
 369                         }
 370                 } else {
 371                         printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
 372                         fclose(fp);
 373                         return;
 374                 }
 375         }
 376         fclose(fp);
 377 }
 378 #endif //NETWORK