package com.theorem.radserver3.examples.server;

import com.theorem.radserver3.*;
import com.theorem.radserver3.radutil.*;
import com.theorem.misc.*;
import java.util.*;

/**
* Proxy implementation example of using the  ProxyInfo methods to send a client
* response instead of forwarding a packet.
*
* This might be required if a server is temporarily unavailable a reply can be processed.
* In this example accounting responses will be generated that give free usage to the client.
*/
public class ProxyFreeUsage extends ProxyImpl
{
	// Logs.
	LogImpl dbg, svr;
	
	// External configuration information.
	Configure conf;

	/**
	* Constructor.
	* @param conf Configuration object.
	*/
	public ProxyFreeUsage(Configure conf)
	{
		this.conf = conf;
	}

	/**
	* Intialize the logs for this class.
	*
	* @param svrLog Server log object.
	* @param dbgLog Debug log object.
	*/
	public void logs(LogImpl svrLog, LogImpl dbgLog)
	{
		dbg = dbgLog;
		svr = svrLog;
	}

	/**
	* Change a request's proxy information.
	*
	* @param prx ProxyInfo object from server.
	*/
	public void changeRequest(ProxyInfo prx) throws AccessDropException, AccessRejectException
	{
		// If the target realm is 'andromeda' and this is an accounting Start request
		// don't send the request.  All other requests are permitted to pass through normally.
		String realm =prx.getRealm();
		if (realm.equals("andromeda"))
		{
			// Only process accounting requests.
			if (prx.getRequestType() == PacketType.Accounting_Request)
			{
				// See if it's a start packet.
				AttributeList requestList = prx.getRequestAttributeList();
				Attribute a[] = requestList.getAttributeArray(Attribute.Acct_Status_Type);

				if (a.length > 0 && a[0].getInt() == AV.Acct_Status_Type.Start)
				{
					// Send a response back to the original client.
					AttributeList list = new AttributeList();
					list.addAttribute(Attribute.Reply_Message, "Your access to Andromeda is free!");
					try {
						prx.sendClientResponse(PacketType.Accounting_Response, list);
					} catch (Exception e) {
						throw new AccessDropException("Unable to send accounting response to client: " + e.getMessage());
					}
					// Drop the packet that was to be forwarded.
					throw new AccessDropException("Dropping accounting start packet. - Free for Andromeda");
				}
			}
		}
	}

	/**
	* Change proxy response routing.
	*
	* @param prx ProxyInfo object from server.
	*/
	public void changeResponse(ProxyInfo prx)  throws AccessDropException, AccessRejectException
	{
		// Does nothing.
	}
}