/*     */ package NET.worlds.network;
/*     */ 
/*     */ import java.net.MalformedURLException;
/*     */ import java.net.URL;
/*     */ import java.net.UnknownHostException;
/*     */ import java.util.Hashtable;
/*     */ import java.util.StringTokenizer;
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ public class DNSLookup
/*     */   implements Runnable
/*     */ {
/*     */   private static final int defaultTimeout = 30;
/*  69 */   private static Hashtable<String, String[]> cache = new Hashtable();
/*     */   
/*     */   private String hostName;
/*     */   
/*     */   private String[] dottedNames;
/*     */   
/*     */   private int timeout;
/*     */   
/*     */ 
/*     */   public static URL lookup(URL url)
/*     */     throws MalformedURLException, UnknownHostException
/*     */   {
/*  81 */     return lookup(url, 30);
/*     */   }
/*     */   
/*     */ 
/*     */ 
/*     */ 
/*     */   public static URL lookupAll(URL url)
/*     */     throws MalformedURLException, UnknownHostException
/*     */   {
/*  90 */     return lookupAll(url, 30);
/*     */   }
/*     */   
/*     */ 
/*     */ 
/*     */ 
/*     */   public static URL lookup(URL url, int timeout)
/*     */     throws MalformedURLException, UnknownHostException
/*     */   {
/*  99 */     String hostName = url.getHost();
/* 100 */     if (hostName == null) {
/* 101 */       return url;
/*     */     }
/*     */     
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/* 113 */     return new URL(url.getProtocol(), hostName, url.getPort(), url
/* 114 */       .getFile());
/*     */   }
/*     */   
/*     */ 
/*     */ 
/*     */ 
/*     */ 
/*     */   public static URL lookupAll(URL url, int timeout)
/*     */     throws MalformedURLException, UnknownHostException
/*     */   {
/* 124 */     String hostName = url.getHost();
/* 125 */     if (hostName == null) {
/* 126 */       return url;
/*     */     }
/* 128 */     String[] addresses = lookupAll(hostName, timeout);
/* 129 */     String hosts = "";
/* 130 */     for (int i = 0; i < addresses.length; i++) {
/* 131 */       if (i != 0)
/* 132 */         hosts = hosts + ";";
/* 133 */       hosts = hosts + addresses[i];
/*     */     }
/* 135 */     return new URL(url.getProtocol(), hosts, url.getPort(), url.getFile());
/*     */   }
/*     */   
/*     */   public static String lookup(String hostName) throws UnknownHostException
/*     */   {
/* 140 */     return lookup(hostName, 30);
/*     */   }
/*     */   
/*     */   public static String lookup(String hostName, int timeout)
/*     */     throws UnknownHostException
/*     */   {
/* 146 */     if (isDotted(hostName))
/* 147 */       return hostName;
/* 148 */     return lookupAllCommon(hostName, timeout)[0];
/*     */   }
/*     */   
/*     */   public static String[] lookupAll(String hostName)
/*     */     throws UnknownHostException
/*     */   {
/* 154 */     return lookupAll(hostName, 30);
/*     */   }
/*     */   
/*     */   public static String[] lookupAll(String hostName, int timeout)
/*     */     throws UnknownHostException
/*     */   {
/* 160 */     if (isDotted(hostName)) {
/* 161 */       String[] names = new String[1];
/* 162 */       names[0] = hostName;
/* 163 */       return names;
/*     */     }
/* 165 */     return lookupAllCommon(hostName, timeout);
/*     */   }
/*     */   
/*     */ 
/*     */ 
/*     */ 
/*     */   private static String[] lookupAllCommon(String hostName, int timeout)
/*     */     throws UnknownHostException
/*     */   {
/* 174 */     String[] dotted = (String[])cache.get(hostName);
/* 175 */     if (dotted == null) {
/* 176 */       dotted = new DNSLookup(hostName, timeout).getDottedNames();
/* 177 */       if (dotted == null)
/* 178 */         throw new UnknownHostException(hostName);
/* 179 */       cache.put(hostName, dotted);
/*     */     }
/*     */     
/*     */ 
/*     */ 
/*     */ 
/* 185 */     return dotted;
/*     */   }
/*     */   
/*     */   private DNSLookup(String hostName, int timeout) {
/* 189 */     this.hostName = hostName;
/* 190 */     this.timeout = timeout;
/* 191 */     if (timeout != 0) {
/* 192 */       Thread t = new Thread(this);
/* 193 */       t.setDaemon(true);
/* 194 */       t.start();
/*     */     } else {
/* 196 */       run();
/*     */     }
/*     */   }
/*     */   
/*     */   public void run() {
/* 201 */     this.dottedNames = gethostbyname(this.hostName);
/* 202 */     if (this.timeout != 0) {
/* 203 */       synchronized (this) {
/* 204 */         notify();
/*     */       }
/*     */     }
/*     */   }
/*     */   
/*     */   private synchronized String[] getDottedNames() {
/* 210 */     if ((this.dottedNames == null) && (this.timeout != 0)) {
/*     */       try {
/* 212 */         wait(this.timeout * 1000);
/*     */       }
/*     */       catch (InterruptedException localInterruptedException) {}
/*     */     }
/* 216 */     return this.dottedNames;
/*     */   }
/*     */   
/*     */ 
/*     */   private static boolean isDotted(String name)
/*     */   {
/* 222 */     StringTokenizer tok = new StringTokenizer(name, ".");
/* 223 */     if (tok.countTokens() != 4)
/* 224 */       return false;
/* 225 */     for (int i = 0; i < 4; i++) {
/*     */       try {
/* 227 */         int val = Integer.parseInt(tok.nextToken());
/* 228 */         if ((val < 0) || (val > 255))
/* 229 */           return false;
/*     */       } catch (NumberFormatException nfe) {
/* 231 */         return false;
/*     */       }
/*     */     }
/* 234 */     return true;
/*     */   }
/*     */   
/*     */   private static native String[] gethostbyname(String paramString);
/*     */ }


/* Location:              C:\Program Files (x86)\Worlds Inc\WorldsPlayer - Win7\lib\worlds.jar!\NET\worlds\network\DNSLookup.class
 * Java compiler version: 6 (50.0)
 * JD-Core Version:       0.7.1
 */