PC Online 1997 August/PCO0897.ISO/browser/tonline/ie32.exe/IEXPLORE.CAB/CLASSES.ZIP/java/net/InetAddress.class

Java Class File | 1996-10-01 | 4.0 KB | 180 lines

package java.net;

import java.util.Hashtable;

public final class InetAddress {
   private static boolean inCheck;
   String hostName;
   int address;
   int family;
   static Hashtable addressCache;
   static InetAddress unknownAddress;
   static InetAddress anyLocalAddress;
   static InetAddress localHost;
   private static InetAddress loopbackHost;

   InetAddress() {
   }

   InetAddress(String var1, byte[] var2) {
      this.hostName = new String(var1);
      this.family = getInetFamily();
      this.address = var2[3] & 255;
      this.address |= var2[2] << 8 & '\uff00';
      this.address |= var2[1] << 16 & 16711680;
      this.address |= var2[0] << 24 & -16777216;
   }

   public String getHostName() {
      if (this.hostName == null) {
         try {
            this.hostName = getHostByAddr(this.address);
         } catch (UnknownHostException var1) {
            this.hostName = this.getHostAddress();
         }
      }

      return this.hostName;
   }

   public byte[] getAddress() {
      byte[] var1 = new byte[]{(byte)(this.address >>> 24 & 255), (byte)(this.address >>> 16 & 255), (byte)(this.address >>> 8 & 255), (byte)(this.address & 255)};
      return var1;
   }

   public String getHostAddress() {
      return (this.address >>> 24 & 255) + "." + (this.address >>> 16 & 255) + "." + (this.address >>> 8 & 255) + "." + (this.address & 255);
   }

   public int hashCode() {
      return this.address;
   }

   public boolean equals(Object var1) {
      return var1 != null && var1 instanceof InetAddress && ((InetAddress)var1).address == this.address;
   }

   public String toString() {
      return (this.hostName != null ? this.hostName + "/" : "") + this.getHostAddress();
   }

   public static InetAddress getByName(String var0) throws UnknownHostException {
      return var0 != null && var0.length() != 0 ? getAllByName(var0)[0] : loopbackHost;
   }

   public static InetAddress[] getAllByName(String var0) throws UnknownHostException {
      InetAddress var1 = null;
      SecurityManager var2 = System.getSecurityManager();
      if (var2 != null) {
         synchronized(var2){}

         try {
            var1 = __getAllByName(var0);
         } catch (Throwable var5) {
            throw var5;
         }
      } else {
         var1 = __getAllByName(var0);
      }

      return var1;
   }

   static synchronized InetAddress[] __getAllByName(String var0) throws UnknownHostException {
      Object var1 = null;
      if (var0 == null) {
         throw new UnknownHostException(var0);
      } else {
         SecurityManager var2 = System.getSecurityManager();
         if (var2 != null && !var2.getInCheck()) {
            var2.checkConnect(var0, -1);
         }

         Object var3 = addressCache.get(var0);
         if (var3 == null) {
            try {
               byte[][] var4 = lookupAllHostAddr(var0);
               InetAddress[] var5 = new InetAddress[var4.length];

               for(int var6 = 0; var6 < var4.length; ++var6) {
                  byte[] var7 = var4[var6];
                  var5[var6] = new InetAddress(var0, var7);
                  InetAddress[] var8 = new InetAddress[1];
                  String var9 = new String(var5[var6].getHostAddress());
                  var8[0] = new InetAddress(var9, var7);
                  addressCache.put(var9, var8);
               }

               var3 = var5;
            } catch (UnknownHostException var11) {
               var3 = unknownAddress;
            }

            addressCache.put(var0, var3);
         }

         if (var3 == unknownAddress) {
            throw new UnknownHostException(var0);
         } else {
            try {
               var1 = ((InetAddress[])var3).clone();
            } catch (CloneNotSupportedException var10) {
               ((Throwable)var10).printStackTrace();
            }

            return (InetAddress[])var1;
         }
      }
   }

   public static InetAddress getLocalHost() throws UnknownHostException {
      if (localHost.equals(unknownAddress)) {
         throw new UnknownHostException();
      } else {
         SecurityManager var0 = System.getSecurityManager();

         try {
            if (var0 != null && !var0.getInCheck()) {
               var0.checkConnect(localHost.getHostName(), -1);
            }
         } catch (SecurityException var1) {
            return loopbackHost;
         }

         return localHost;
      }
   }

   private static native String getLocalHostName() throws UnknownHostException;

   private static native void makeAnyLocalAddress(InetAddress var0);

   private static native byte[] lookupHostAddr(String var0) throws UnknownHostException;

   private static native byte[][] lookupAllHostAddr(String var0) throws UnknownHostException;

   private static native String getHostByAddr(int var0) throws UnknownHostException;

   private static native int getInetFamily();

   static {
      System.loadLibrary("javart");
      addressCache = new Hashtable();
      unknownAddress = new InetAddress();
      anyLocalAddress = new InetAddress();
      makeAnyLocalAddress(anyLocalAddress);
      byte[] var0 = new byte[]{127, 0, 0, 1};
      loopbackHost = new InetAddress("localhost", var0);

      try {
         localHost = getByName(getLocalHostName());
      } catch (Exception var3) {
         localHost = unknownAddress;
      }

      String var1 = new String("0.0.0.0");
      InetAddress[] var2 = new InetAddress[]{new InetAddress(var1, unknownAddress.getAddress())};
      addressCache.put(var1, var2);
   }
}