/*
 * @(#)file      SnmpIncomingResponse.java
 * @(#)author    Sun Microsystems, Inc.
 * @(#)version   1.16
 * @(#)date      06/05/03
 *
 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 */
package com.sun.jmx.snmp.internal;

import java.net.InetAddress;
import com.sun.jmx.snmp.SnmpPduFactory;
import com.sun.jmx.snmp.SnmpSecurityParameters;
import com.sun.jmx.snmp.SnmpSecurityException;
import com.sun.jmx.snmp.SnmpTooBigException;
import com.sun.jmx.snmp.SnmpStatusException;
import com.sun.jmx.snmp.SnmpPdu;
import com.sun.jmx.snmp.SnmpMsg;

import com.sun.jmx.snmp.internal.SnmpSecurityCache;
import com.sun.jmx.snmp.SnmpBadSecurityLevelException;
/**
 * <P> An <CODE>SnmpIncomingResponse</CODE> handles the unmarshalling of the received response.</P>
 * <p><b>This API is a Sun Microsystems internal API  and is subject 
 * to change without notice.</b></p>
 * @since 1.5
 */

public interface SnmpIncomingResponse {
    /**
     * Returns the source address.
     * @return The source address.
     */
    public InetAddress getAddress();

    /**
     * Returns the source port.
     * @return The source port.
     */
    public int getPort();

    /**
     * Gets the incoming response security parameters.
     * @return The security parameters.
     **/
    public SnmpSecurityParameters getSecurityParameters();
    /**
     * Call this method in order to reuse <CODE>SnmpOutgoingRequest</CODE> cache.
     * @param cache The security cache.
     */
    public void setSecurityCache(SnmpSecurityCache cache);
    /**
     * Gets the incoming response security level. This level is defined in 
     * {@link com.sun.jmx.snmp.SnmpEngine SnmpEngine}.
     * @return The security level.
     */
    public int getSecurityLevel();
    /**
     * Gets the incoming response security model.
     * @return The security model.
     */
    public int getSecurityModel();
    /**
     * Gets the incoming response context name.
     * @return The context name.
     */
    public byte[] getContextName();
    
    /**
     * Decodes the specified bytes and initializes itself with the received 
     * response.
     * 
     * @param inputBytes The bytes to be decoded.
     *
     * @exception SnmpStatusException If the specified bytes are not a valid encoding.
     */
    public SnmpMsg decodeMessage(byte[] inputBytes, 
				 int byteCount, 
				 InetAddress address,
				 int port) 
        throws SnmpStatusException, SnmpSecurityException;
   
    /**
     * Gets the request PDU encoded in the received response.
     * <P>
     * This method decodes the data field and returns the resulting PDU.
     * 
     * @return The resulting PDU.
     * @exception SnmpStatusException If the encoding is not valid.
     */
    public SnmpPdu decodeSnmpPdu() 
	throws SnmpStatusException;

    /**
     * Returns the response request Id.
     * @param data The flat message.
     * @return The request Id.
     */
    public int getRequestId(byte[] data) throws SnmpStatusException;

    /**
     * Returns a stringified form of the message to send.
     * @return The message state string.
     */
    public String printMessage();
}