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/*
* SNMP Package
*
* Copyright (C) 2004, Jonathan Sevy <jsevy@mcs.drexel.edu>
*
* This is free software. Redistribution and use in source and binary forms, with
* or without modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
package snmp;
import java.io.*;
import java.net.*;
/**
* The class SNMPTrapSenderInterface implements an interface for sending SNMPv1 and SNMPv2 trap messages to a
* remote SNMP manager. The approach is that from version 1 of SNMP, using no encryption of data.
* Communication occurs via UDP, using port 162, the standard SNMP trap port, as the destination port, unless
* an alternate (non-standard) port is suppied in the constructor.
*/
public class SNMPTrapSenderInterface
{
public static final int SNMP_TRAP_PORT = 162;
private int remotePort;
private DatagramSocket dSocket;
/**
* Construct a new trap sender object to send traps to remote SNMP hosts.
*/
public SNMPTrapSenderInterface()
throws SocketException
{
this(SNMP_TRAP_PORT);
}
/**
* Construct a new trap sender object to send traps to remote SNMP hosts, sending to
* the specified remote port.
*/
public SNMPTrapSenderInterface(int remotePort)
throws SocketException
{
this.remotePort = remotePort;
dSocket = new DatagramSocket();
}
/**
* Send the supplied SNMPv1 trap pdu to the specified host, using the supplied version number
* and community name. Use version = 0 for SNMP version 1, or version = 1 for enhanced
* capabilities provided through RFC 1157.
*/
public void sendTrap(int version, InetAddress hostAddress, String community, SNMPv1TrapPDU pdu)
throws IOException
{
SNMPMessage message = new SNMPMessage(version, community, pdu);
byte[] messageEncoding = message.getBEREncoding();
/*
System.out.println("Request Message bytes:");
for (int i = 0; i < messageEncoding.length; ++i)
System.out.print(hexByte(messageEncoding[i]) + " ");
*/
DatagramPacket outPacket = new DatagramPacket(messageEncoding, messageEncoding.length, hostAddress, remotePort);
/*
System.out.println("Message bytes length (out): " + outPacket.getLength());
System.out.println("Message bytes (out):");
for (int i = 0; i < messageEncoding.length; ++i)
{
System.out.print(hexByte(messageEncoding[i]) + " ");
}
System.out.println("\n");
*/
dSocket.send(outPacket);
}
/**
* Send the supplied trap pdu to the specified host, using the supplied community name and
* using 0 for the version field in the SNMP message (corresponding to SNMP version 1).
*/
public void sendTrap(InetAddress hostAddress, String community, SNMPv1TrapPDU pdu)
throws IOException
{
int version = 0;
sendTrap(version, hostAddress, community, pdu);
}
/**
* Send the supplied SNMPv2 trap pdu to the specified host, using the supplied version number
* and community name.
*/
public void sendTrap(int version, InetAddress hostAddress, String community, SNMPv2TrapPDU pdu)
throws IOException
{
SNMPMessage message = new SNMPMessage(version, community, pdu);
byte[] messageEncoding = message.getBEREncoding();
/*
System.out.println("Request Message bytes:");
for (int i = 0; i < messageEncoding.length; ++i)
System.out.print(hexByte(messageEncoding[i]) + " ");
*/
DatagramPacket outPacket = new DatagramPacket(messageEncoding, messageEncoding.length, hostAddress, remotePort);
/*
System.out.println("Message bytes length (out): " + outPacket.getLength());
System.out.println("Message bytes (out):");
for (int i = 0; i < messageEncoding.length; ++i)
{
System.out.print(hexByte(messageEncoding[i]) + " ");
}
System.out.println("\n");
*/
dSocket.send(outPacket);
}
/**
* Send the supplied trap pdu to the specified host, using the supplied community name and
* using 1 for the version field in the SNMP message.
*/
public void sendTrap(InetAddress hostAddress, String community, SNMPv2TrapPDU pdu)
throws IOException
{
int version = 1;
sendTrap(version, hostAddress, community, pdu);
}
private String hexByte(byte b)
{
int pos = b;
if (pos < 0)
pos += 256;
String returnString = new String();
returnString += Integer.toHexString(pos/16);
returnString += Integer.toHexString(pos%16);
return returnString;
}
private String getHex(byte theByte)
{
int b = theByte;
if (b < 0)
b += 256;
String returnString = new String(Integer.toHexString(b));
// add leading 0 if needed
if (returnString.length()%2 == 1)
returnString = "0" + returnString;
return returnString;
}
}
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