Difference for arch/linux/linuxnet.c from version 1.3 to 1.4

version 1.3 version 1.4
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 /*  
 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX  
 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO  
 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A  
 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS  
 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS  
 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE  
 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE  
 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS  
 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.    
 COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.  
 */  
 #include <stdlib.h>  
 #include <stdio.h>  
 #include <string.h>  
 #include <sys/types.h>  
 #include <sys/time.h>  
 #include <netinet/in.h> /* for htons & co. */  
   
 #include "types.h"  #include "types.h"
 #include "config.h"  
 #include "args.h"  
   
 #include "ipx_drv.h"  #include "ipx_drv.h"
 #include "ipx_bsd.h"  #include "ipx_bsd.h"
 #include "ipx_kali.h"  #include "ipx_kali.h"
 #include "ipx_udp.h"  #include "ipx_udp.h"
 //added 05/17/99 Matt Mueller - needed to redefine FD_* so that no asm is used  
 #include "checker.h"  
 //end addition -MM  
 #define MAX_IPX_DATA 576  
   
 int ipx_fd;  struct ipx_driver * arch_ipx_set_driver(char *arg)
 ipx_socket_t ipx_socket_data;  
 ubyte ipx_installed=0;  
 ushort ipx_socket = 0;  
 uint ipx_network = 0;  
 ubyte ipx_MyAddress[10];  
 int ipx_packetnum = 0; /* Sequence number */  
 //int     ipx_packettotal=0,ipx_lastspeed=0;  
   
 /* User defined routing stuff */  
 typedef struct user_address {  
  ubyte network[4];  
  ubyte node[6];  
  ubyte address[6];  
 } user_address;  
 #define MAX_USERS 64  
 int Ipx_num_users = 0;  
 user_address Ipx_users[MAX_USERS];  
   
 #define MAX_NETWORKS 64  
 int Ipx_num_networks = 0;  
 uint Ipx_networks[MAX_NETWORKS];  
   
 void ipx_close(void);  
   
 int ipx_general_PacketReady(ipx_socket_t *s) {  
  fd_set set;  
  struct timeval tv;  
    
  FD_ZERO(&set);  
  FD_SET(s->fd, &set);  
  tv.tv_sec = tv.tv_usec = 0;  
  if (select(s->fd + 1, &set, NULL, NULL, &tv) > 0)  
  return 1;  
  else  
  return 0;  
 }  
   
 struct ipx_driver *driver = &ipx_bsd;  
   
 ubyte * ipx_get_my_server_address()  
 {  
  return (ubyte *)&ipx_network;  
 }  
   
 ubyte * ipx_get_my_local_address()  
 {  
  return (ubyte *)(ipx_MyAddress + 4);  
 }  
   
 //---------------------------------------------------------------  
 // Initializes all IPX internals.   
 // If socket_number==0, then opens next available socket.  
 // Returns: 0  if successful.  
 // -1 if socket already open.  
 // -2 if socket table full.  
 // -3 if IPX not installed.  
 // -4 if couldn't allocate low dos memory  
 // -5 if error with getting internetwork address  
 int ipx_init( int socket_number, int show_address )  
 {  
  int i;  
    
  if (FindArg("-kali")) {  
  printf("Using Kali for network games\n");  
  driver = &ipx_kali;  
 //added on 12/20/98 by Jan Kratochvil for direct TCP/IP games  
         } else if (FindArg("-udp")) {  
                 printf("Using native TCP/IP (UDP) for network games\n");  
                 driver = &ipx_udp;  
 //end this section addition - JK  
  } else {  
  printf("Using real IPX for network games\n");  
  driver = &ipx_bsd;  
  }  
  if ((i = FindArg("-ipxnetwork")) && Args[i + 1]) {  
  unsigned long n = strtol(Args[i + 1], NULL, 16);  
  ipx_MyAddress[0] = n >> 24; ipx_MyAddress[1] = (n >> 16) & 255;  
  ipx_MyAddress[2] = (n >> 8) & 255; ipx_MyAddress[3] = n & 255;  
  printf("IPX: Using network %08x\n", (unsigned int)n);  
  }  
  if (driver->OpenSocket(&ipx_socket_data, socket_number)) {  
  return -3;  
  }  
  driver->GetMyAddress();  
  memcpy(&ipx_network, ipx_MyAddress, 4);  
  Ipx_num_networks = 0;  
  memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );  
  ipx_installed = 1;  
  atexit(ipx_close);  
  return 0;  
 }  
   
 void ipx_close()  
 {  
  if (ipx_installed)  
                 driver->CloseSocket(&ipx_socket_data);  
  ipx_installed = 0;  
 }  
   
 int ipx_get_packet_data( ubyte * data )  
 {  {
  struct ipx_recv_data rd;   if (strcmp(arg,"kali")==0){
  char buf[MAX_IPX_DATA];   return &ipx_kali;
 //killed 6-15-99 to get rid of compile warnings - OE  #if 0
 // uint best_id = 0;   }else if (strcmp(arg,"udp")==0){
 // uint pkt_num;   return &ipx_udp;
 //end kill - OE  
  int size;  
  int best_size = 0;  
 //edited 04/12/99 Matt Mueller - duh, we don't want to throw all that data away!  
  //--killed-- Like the original, only take latest packet, throw away rest  
  //do _NOT_ throw them away!  
  while (driver->PacketReady(&ipx_socket_data)) {  
  if ((size =   
       driver->ReceivePacket(&ipx_socket_data, buf,   
        sizeof(buf), &rd)) > 4) {  
       if (!memcmp(rd.src_network, ipx_MyAddress, 10))   
       continue; /* don't get own pkts */  
 //--killed--      pkt_num = *(uint *)buf;  
 //--killed--      if (pkt_num >= best_id) {  
       memcpy(data, buf + 4, size - 4);  
  return size-4;  
 //--killed--      best_id = pkt_num;  
 //--killed--      best_size = size - 4;  
 //--killed--      }  
 //end edit -MM  
  }  
  }  
  return best_size;  
 }  
   
 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )  
 {  
  u_char buf[MAX_IPX_DATA];  
  IPXPacket_t ipx_header;  
    
  memcpy(ipx_header.Destination.Network, network, 4);  
  memcpy(ipx_header.Destination.Node, immediate_address, 6);  
  *(u_short *)ipx_header.Destination.Socket = htons(ipx_socket_data.socket);  
  ipx_header.PacketType = 4; /* Packet Exchange */  
  *(uint *)buf = ipx_packetnum++;  
     //ipx_packettotal+=datasize+4;  
     //if (f2i(Players[Player_num].time_level) && (f2i(Players[Player_num].time_level)%10!=ipx_lastspeed))  
  //{  
  //   ipx_lastspeed=f2i(Players[Player_num].time_level)%10;  
  //   printf("tot=%i,t2=%i,time=%i,avg=%i,a2=%i\n",ipx_packetnum,ipx_packettotal,(int)f2i(Players[Player_num].time_level),  
  //     ipx_packetnum/(int)f2i(Players[Player_num].time_level),  
  //     ipx_packettotal/(int)f2i(Players[Player_num].time_level));  
  //}      
  memcpy(buf + 4, data, datasize);  
  driver->SendPacket(&ipx_socket_data, &ipx_header, buf, datasize + 4);  
 }  
   
 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )  
 {  
  // let's hope Linux knows how to route it  
  memcpy( local_target, node, 6 );  
 }  
   
 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )   
 {  
  int i, j;  
  ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };  
  ubyte local_address[6];  
   
  // Set to all networks besides mine  
  for (i=0; i<Ipx_num_networks; i++ ) {  
  if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) ) {  
  ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );  
  ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );  
  } else {  
  ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );  
  }  
  }  
   
  //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );  
   
  // Send directly to all users not on my network or in the network list.  
  for (i=0; i<Ipx_num_users; i++ ) {  
  if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) ) {  
  for (j=0; j<Ipx_num_networks; j++ ) {  
  if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))  
  goto SkipUser;  
  }  
  ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );  
 SkipUser:  
  j = 0;  
  }  
  }  
 }  
   
 // Sends a non-localized packet... needs 4 byte server, 6 byte address  
 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )  
 {  
  ubyte local_address[6];  
   
  if ( (*(uint *)server) != 0 ) {  
  ipx_get_local_target( server, address, local_address );  
  ipx_send_packet_data( data, datasize, server, address, local_address );  
  } else {  
  // Old method, no server info.  
  ipx_send_packet_data( data, datasize, server, address, address );  
  }  
 }  
   
 int ipx_change_default_socket( ushort socket_number )  
 {  
  if ( !ipx_installed ) return -3;  
   
  driver->CloseSocket(&ipx_socket_data);  
  if (driver->OpenSocket(&ipx_socket_data, socket_number)) {  
  return -3;  
  }  
  return 0;  
 }  
   
 void ipx_read_user_file(char * filename)  
 {  
  FILE * fp;  
  user_address tmp;  
  char temp_line[132], *p1;  
  int n, ln=0, x;  
   
  if (!filename) return;  
   
  Ipx_num_users = 0;  
   
  fp = fopen( filename, "rt" );  
  if ( !fp ) return;  
   
  printf( "Broadcast Users:\n" );  
   
  while (fgets(temp_line, 132, fp)) {  
  ln++;  
  p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';  
  p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';  
 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code  
  if (strlen(temp_line) >= 21 && temp_line[8] == '/') {  
  for (n = 0; n < 4; n++) {  
  if (sscanf(temp_line + n * 2, "%2x", &x) != 1)  
  break;  
  tmp.network[n] = x;  
  }  
  if (n != 4)  
  continue;  
  for (n = 0; n < 6; n++) {  
  if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)  
  break;  
  tmp.node[n] = x;  
  }  
  if (n != 6)  
  continue;  
  } else  
  continue;  
 #else  
  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] );  
  if ( n != 10 ) continue;  
 #endif  
  if ( Ipx_num_users < MAX_USERS ) {  
  ubyte * ipx_real_buffer = (ubyte *)&tmp;  
  ipx_get_local_target( tmp.network, tmp.node, tmp.address );  
  Ipx_users[Ipx_num_users++] = tmp;  
  printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );  
  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] );  
  } else {  
  printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );  
  fclose(fp);  
  return;  
  }  
  }  
  fclose(fp);  
 }  
   
   
 void ipx_read_network_file(char * filename)  
 {  
  FILE * fp;  
  user_address tmp;  
  char temp_line[132], *p1;  
  int i, n, ln=0, x;  
   
  if (!filename) return;  
   
  fp = fopen( filename, "rt" );  
  if ( !fp ) return;  
   
  printf( "Using Networks:\n" );  
  for (i=0; i<Ipx_num_networks; i++ ) {  
  ubyte * n1 = (ubyte *)&Ipx_networks[i];  
  printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );  
  }  
   
  while (fgets(temp_line, 132, fp)) {  
  ln++;  
  p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';  
  p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';  
 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code  
  if (strlen(temp_line) >= 8) {  
  for (n = 0; n < 4; n++) {  
  if (sscanf(temp_line + n * 2, "%2x", &x) != 1)  
  break;  
  tmp.network[n] = x;  
  }  
  if (n != 4)  
  continue;  
  } else  
  continue;  
 #else  
  n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );  
  if ( n != 4 ) continue;  
 #endif  #endif
  if ( Ipx_num_networks < MAX_NETWORKS  ) {  
  int j;  
  for (j=0; j<Ipx_num_networks; j++ )   
  if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )  
  break;  
  if ( j >= Ipx_num_networks ) {  
  memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );  
  printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );  
  }  
  } else {   } else {
  printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );   return &ipx_bsd;
  fclose(fp);  
  return;  
  }  
  }   }
  fclose(fp);  
 }  }

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