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package com.sun.jmx.snmp;





Defines the interface of the object in charge of encoding and decoding SNMP packets.


You will not usually need to use this interface, except if you
decide to replace the default implementation SnmpPduFactoryBER.


An SnmpPduFactory object is attached to an SNMP protocol adaptor or an SnmpPeer. It is used each time an SNMP packet needs to be encoded or decoded. 
SnmpPduFactoryBER is the default implementation. It simply applies the standard ASN.1 encoding and decoding on the bytes of the SNMP packet. 

It's possible to implement your own SnmpPduFactory
object and to add authentication and/or encryption to the
default encoding/decoding process.

This API is a Sun Microsystems internal API  and is subject
to change without notice.


See Also:
/**
 * Defines the interface of the object in charge of encoding and decoding SNMP packets.
 * <P>
 * You will not usually need to use this interface, except if you
 * decide to replace the default implementation <CODE>SnmpPduFactoryBER</CODE>.
 * <P>
 * An <CODE>SnmpPduFactory</CODE> object is attached to an
 * {@link com.sun.jmx.snmp.daemon.SnmpAdaptorServer SNMP protocol adaptor}
 * or an {@link com.sun.jmx.snmp.SnmpPeer SnmpPeer}.
 * It is used each time an SNMP packet needs to be encoded or decoded.
 * <BR>{@link com.sun.jmx.snmp.SnmpPduFactoryBER SnmpPduFactoryBER} is the default
 * implementation.
 * It simply applies the standard ASN.1 encoding and decoding
 * on the bytes of the SNMP packet.
 * <P>
 * It's possible to implement your own <CODE>SnmpPduFactory</CODE>
 * object and to add authentication and/or encryption to the
 * default encoding/decoding process.
 *
 * <p><b>This API is a Sun Microsystems internal API  and is subject
 * to change without notice.</b></p>
 * @see SnmpPduFactory
 * @see SnmpPduPacket
 * @see SnmpMessage
 *
 */

public interface SnmpPduFactory {

    
Decodes the specified SnmpMsg and returns the
resulting SnmpPdu. If this method returns
null, the message will be considered unsafe
and will be dropped.

Params:
  • msg – The SnmpMsg to be decoded.
Throws:
Returns:Null or a fully initialized SnmpPdu.
Since:1.5
/**
     * Decodes the specified <CODE>SnmpMsg</CODE> and returns the
     * resulting <CODE>SnmpPdu</CODE>. If this method returns
     * <CODE>null</CODE>, the message will be considered unsafe
     * and will be dropped.
     *
     * @param msg The <CODE>SnmpMsg</CODE> to be decoded.
     * @return Null or a fully initialized <CODE>SnmpPdu</CODE>.
     * @exception SnmpStatusException If the encoding is invalid.
     *
     * @since 1.5
     */
    public SnmpPdu decodeSnmpPdu(SnmpMsg msg) throws SnmpStatusException ;

    
Encodes the specified SnmpPdu and
returns the resulting SnmpMsg. If this
method returns null, the specified SnmpPdu
will be dropped and the current SNMP request will be
aborted.

Params:
  • p – The SnmpPdu to be encoded.
  • maxDataLength – The size limit of the resulting encoding.
Throws:
Returns:Null or a fully encoded SnmpMsg.
Since:1.5
/**
     * Encodes the specified <CODE>SnmpPdu</CODE> and
     * returns the resulting <CODE>SnmpMsg</CODE>. If this
     * method returns null, the specified <CODE>SnmpPdu</CODE>
     * will be dropped and the current SNMP request will be
     * aborted.
     *
     * @param p The <CODE>SnmpPdu</CODE> to be encoded.
     * @param maxDataLength The size limit of the resulting encoding.
     * @return Null or a fully encoded <CODE>SnmpMsg</CODE>.
     * @exception SnmpStatusException If <CODE>pdu</CODE> contains
     *            illegal values and cannot be encoded.
     * @exception SnmpTooBigException If the resulting encoding does not
     *            fit into <CODE>maxPktSize</CODE> bytes.
     *
     * @since 1.5
     */
    public SnmpMsg encodeSnmpPdu(SnmpPdu p, int maxDataLength)
        throws SnmpStatusException, SnmpTooBigException ;
}