--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/src/main/java/net/sourceforge/jsocks/InetRange.java	Thu Dec 03 11:23:55 2015 -0800
@@ -0,0 +1,440 @@
+package net.sourceforge.jsocks;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.*;
+
+/**
+ * Class InetRange provides the means of defining the range of inetaddresses.
+ * It's used by Proxy class to store and look up addresses of machines, that
+ * should be contacted directly rather then through the proxy.
+ * <P>
+ * InetRange provides several methods to add either standalone addresses, or
+ * ranges (e.g. 100.200.300.0:100.200.300.255, which covers all addresses
+ * on on someones local network). It also provides methods for checking wether
+ * given address is in this range. Any number of ranges and standalone 
+ * addresses can be added to the range.
+ */
+public class InetRange implements Cloneable{
+
+    Hashtable host_names;
+    Vector all;
+    Vector end_names;
+
+    boolean useSeparateThread = true;
+
+    /**
+     * Creates the empty range.
+     */
+    public InetRange(){
+      all = new Vector();
+      host_names = new Hashtable();
+      end_names = new Vector();
+    }
+
+    /**
+     *  Adds another host or range to this range.
+        The String can be one of those:
+        <UL>
+        <li> Host name. eg.(Athena.myhost.com or 45.54.56.65)
+        
+        <li> Range in the form .myhost.net.au <BR>
+             In which case anything that ends with .myhost.net.au will
+             be considered in the range.
+
+        <li> Range in the form ddd.ddd.ddd. <BR>
+             This will be treated as range ddd.ddd.ddd.0 to ddd.ddd.ddd.255.
+             It is not necessary to specify 3 first bytes you can use just 
+             one or two. For example 130. will cover address between 130.0.0.0
+             and 13.255.255.255.
+
+        <li> Range in the form host_from[: \t\n\r\f]host_to. <br>
+             That is two hostnames or ips separated by either whitespace 
+             or colon.
+        </UL>
+     */
+    public synchronized boolean add(String s){
+      if(s == null) return false;
+
+      s = s.trim();
+      if(s.length() == 0) return false;
+
+      Object[] entry;
+
+      if(s.charAt(s.length()-1) == '.'){
+         //thing like: 111.222.33. 
+         //it is being treated as range 111.222.33.000 - 111.222.33.255
+
+         int[] addr = ip2intarray(s);
+         long from,to;
+         from = to = 0;
+
+         if(addr == null) return false;
+         for(int i = 0; i< 4;++i){
+            if(addr[i]>=0)
+              from += (((long)addr[i]) << 8*(3-i));
+            else{
+              to = from;
+              while(i<4)
+                to += 255l << 8*(3-i++);
+              break;
+            }
+         }
+         entry = new Object[] {s,null,new Long(from),new Long(to)};
+         all.addElement(entry);
+
+      }else if(s.charAt(0) == '.'){
+         //Thing like: .myhost.com
+
+         end_names.addElement(s);
+         all.addElement(new Object[]{s,null,null,null});
+      }else{
+         StringTokenizer tokens = new StringTokenizer(s," \t\r\n\f:");
+         if(tokens.countTokens() > 1){
+           entry = new Object[] {s,null,null,null};
+           resolve(entry,tokens.nextToken(),tokens.nextToken());
+           all.addElement(entry);
+         }else{
+           entry = new Object[] {s,null,null,null};
+           all.addElement(entry);
+           host_names.put(s,entry);
+           resolve(entry);
+         }
+
+      }
+
+      return true;
+    }
+
+    /**
+     *  Adds another ip for this range.
+        @param ip IP os the host which should be added to this range.
+     */
+    public synchronized void add(InetAddress ip){
+       long from, to;
+       from = to = ip2long(ip);
+       all.addElement(new Object[]{ip.getHostName(),ip,new Long(from),
+                                                       new Long(to)});
+    }
+
+    /**
+     *  Adds another range of ips for this range.Any host with ip address
+        greater than or equal to the address of from and smaller than or equal
+        to the address of to will be included in the range.
+        @param from IP from where range starts(including).
+        @param to   IP where range ends(including).
+     */
+    public synchronized void add(InetAddress from,InetAddress to){
+       all.addElement(new Object[]{from.getHostAddress()+":"+to.getHostAddress()
+                            ,null,new Long(ip2long(from)),
+                                  new Long(ip2long(to))});
+    }
+
+    /**
+     * Checks wether the givan host is in the range. Attempts to resolve
+       host name if required.
+       @param host Host name to check.
+       @return true If host is in the range, false otherwise.
+     * @see InetRange#contains(String,boolean)
+     */
+    public synchronized boolean contains(String host){
+       return contains(host,true);
+    }
+
+    /**
+     *  Checks wether the given host is in the range.
+     *  <P>
+     *  Algorithm: <BR>
+     *  <ol>
+     *  <li>Look up if the hostname is in the range (in the Hashtable).
+     *  <li>Check if it ends with one of the speciefied endings.
+     *  <li>Check if it is ip(eg.130.220.35.98). If it is check if it is
+     *      in the range.
+     *  <li>If attemptResolve is true, host is name, rather than ip, and
+     *      all previous attempts failed, try to resolve the hostname, and
+     *      check wether the ip associated with the host is in the range.It
+     *      also repeats all previos steps with the hostname obtained from
+     *      InetAddress, but the name is not allways the full name,it is 
+     *      quite likely to be the same. Well it was on my machine.
+     *  </ol>
+       @param host Host name to check.
+       @param attemptResolve Wether to lookup ip address which corresponds
+       to the host,if required.
+       @return true If host is in the range, false otherwise.
+     */
+    public synchronized boolean contains(String host,boolean attemptResolve){
+       if(all.size() ==0) return false; //Empty range
+
+       host = host.trim();
+       if(host.length() == 0) return false;
+
+       if(checkHost(host)) return true;
+       if(checkHostEnding(host)) return true;
+
+       long l = host2long(host);
+       if(l >=0) return contains(l);
+
+       if(!attemptResolve) return false;
+
+       try{
+          InetAddress ip = InetAddress.getByName(host);
+          return contains(ip);
+       }catch(UnknownHostException uhe){
+
+       }
+
+       return false;
+    }
+
+    /**
+     * Checks wether the given ip is in the range.
+       @param ip Address of the host to check.
+       @return true If host is in the range, false otherwise.
+     */
+    public synchronized boolean contains(InetAddress ip){
+       if(checkHostEnding(ip.getHostName())) return true;
+       if(checkHost(ip.getHostName())) return true;
+       return contains(ip2long(ip));
+    }
+    /**
+       Get all entries in the range as strings. <BR>
+       These strings can be used to delete entries from the range
+       with remove function.
+       @return Array of entries as strings.
+       @see InetRange#remove(String)
+     */
+    public synchronized String[] getAll(){
+       int size = all.size();
+       Object entry[];
+       String all_names[] = new String[size];
+
+       for(int i=0;i<size;++i){
+          entry = (Object[]) all.elementAt(i);
+          all_names[i] = (String) entry[0];
+       }
+       return all_names;
+    }
+    /**
+      Removes an entry from this range.<BR>
+      @param s Entry to remove.
+      @return true if successfull.
+     */
+    public synchronized boolean remove(String s){
+      Enumeration eEnum = all.elements();
+      while(eEnum.hasMoreElements()){
+        Object[] entry = (Object[]) eEnum.nextElement();
+        if(s.equals(entry[0])){
+          all.removeElement(entry);
+          end_names.removeElement(s);
+          host_names.remove(s);
+          return true;
+        }
+      }
+      return false;
+    }
+
+    /** Get string representaion of this Range.*/
+    public String toString(){
+       String all[] = getAll();
+       if(all.length == 0) return "";
+
+       String s = all[0];
+       for(int i=1;i<all.length;++i)
+          s += "; "+all[i];
+       return s;
+    }
+
+    /** Creates a clone of this Object*/
+    public Object clone(){
+      InetRange new_range = new InetRange();
+      new_range.all = (Vector)all.clone();
+      new_range.end_names = (Vector) end_names.clone();
+      new_range.host_names = (Hashtable)host_names.clone();
+      return new_range;
+    }
+
+
+//Private methods
+/////////////////
+    /**
+     * Same as previous but used internally, to avoid
+     * unnecessary convertion of IPs, when checking subranges
+     */
+    private synchronized boolean contains(long ip){
+       Enumeration eEnum = all.elements();
+       while(eEnum.hasMoreElements()){
+         Object[] obj = (Object[]) eEnum.nextElement();
+         Long from = obj[2]==null?null:(Long)obj[2];
+         Long to   = obj[3]==null?null:(Long)obj[3];
+         if(from != null && from.longValue()<= ip 
+                         && to.longValue() >= ip) return true;
+
+       }
+       return false;
+    }
+
+    private boolean checkHost(String host){
+       return host_names.containsKey(host);
+    }
+    private boolean checkHostEnding(String host){
+       Enumeration eEnum = end_names.elements();
+       while(eEnum.hasMoreElements()){
+          if(host.endsWith((String) eEnum.nextElement())) return true;
+       }
+       return false;
+    }
+    private void resolve(Object[] entry){
+       //First check if it's in the form ddd.ddd.ddd.ddd.
+       long ip = host2long((String) entry[0]);
+       if(ip >= 0){
+         entry[2] = entry[3] = new Long(ip);
+       }else{
+         InetRangeResolver res = new InetRangeResolver(entry);
+         res.resolve(useSeparateThread);
+       }
+    }
+    private void resolve(Object[] entry,String from,String to){
+       long f,t;
+       if((f=host2long(from))>= 0 && (t=host2long(to)) >= 0){
+         entry[2] = new Long(f);
+         entry[3] = new Long(t);
+       }else{
+         InetRangeResolver res = new InetRangeResolver(entry,from,to);
+         res.resolve(useSeparateThread);
+       }
+    }
+
+
+
+//Class methods
+///////////////
+
+    //Converts ipv4 to long value(unsigned int)
+    ///////////////////////////////////////////
+    static long ip2long(InetAddress ip){
+        long l=0;
+        byte[] addr = ip.getAddress();
+
+        if(addr.length ==4){ //IPV4
+          for(int i=0;i<4;++i)
+             l += (((long)addr[i] &0xFF) << 8*(3-i));
+        }else{ //IPV6
+          return 0;  //Have no idea how to deal with those
+        }
+        return l;
+    }
+
+
+    long host2long(String host){
+      long ip=0;
+
+      //check if it's ddd.ddd.ddd.ddd
+      if(!Character.isDigit(host.charAt(0))) return -1;
+
+      int[] addr = ip2intarray(host); 
+      if(addr == null) return -1;
+
+      for(int i=0;i<addr.length;++i)
+          ip += ((long)(addr[i]>=0 ? addr[i] : 0)) << 8*(3-i);
+
+      return ip;
+    }
+
+    static int[] ip2intarray(String host){
+       int[] address = {-1,-1,-1,-1};
+       int i=0;
+       StringTokenizer tokens = new StringTokenizer(host,".");
+       if(tokens.countTokens() > 4) return null;
+       while(tokens.hasMoreTokens()){
+         try{
+           address[i++] = Integer.parseInt(tokens.nextToken()) & 0xFF;
+         }catch(NumberFormatException nfe){
+            return null;
+         }
+
+       }
+       return address;
+    }
+
+
+/*
+//* This was the test main function
+//**********************************
+ 
+    public static void main(String args[])throws UnknownHostException{
+       int i;
+
+       InetRange ir = new InetRange();
+
+
+       for(i=0;i<args.length;++i){
+         System.out.println("Adding:" + args[i]);
+         ir.add(args[i]);
+       }
+
+       String host;
+       java.io.DataInputStream din = new java.io.DataInputStream(System.in);
+       try{
+          host = din.readLine();
+          while(host!=null){
+            if(ir.contains(host)){
+              System.out.println("Range contains ip:"+host);
+            }else{
+              System.out.println(host+" is not in the range");
+            }
+            host = din.readLine();
+          }
+       }catch(java.io.IOException io_ex){
+          io_ex.printStackTrace();
+       }
+    }
+********************/
+
+}
+
+
+class InetRangeResolver implements Runnable{
+
+   Object[] entry;
+
+   String from, to;
+
+   InetRangeResolver(Object[] entry){
+      this.entry = entry;
+      from = to = null;
+   }
+   InetRangeResolver(Object[] entry,String from,String to){
+      this.entry = entry;
+      this.from  = from;
+      this.to    = to;
+   }
+   public final void resolve(){
+     resolve(true);
+   }
+   public final void resolve(boolean inSeparateThread){
+     if(inSeparateThread){
+       Thread t = new Thread(this);
+       t.start();
+     }else
+       run();
+
+   }
+   public void run(){
+     try{
+        if(from == null){
+          InetAddress ip = InetAddress.getByName((String) entry[0]);
+          entry[1] = ip;
+          Long l = new Long(InetRange.ip2long(ip));
+          entry[2] = entry[3] = l;
+        }else{
+          InetAddress f = InetAddress.getByName(from);
+          InetAddress t = InetAddress.getByName(to);
+          entry[2] = new Long(InetRange.ip2long(f));
+          entry[3] = new Long(InetRange.ip2long(t));
+
+        }
+     }catch(UnknownHostException uhe){
+        //System.err.println("Resolve failed for "+from+','+to+','+entry[0]);
+     }
+   }
+
+}