001: /*
002: * SNMP Package
003: *
004: * Copyright (C) 2004, Jonathan Sevy <jsevy@mcs.drexel.edu>
005: *
006: * This is free software. Redistribution and use in source and binary forms, with
007: * or without modification, are permitted provided that the following conditions
008: * are met:
009: *
010: * 1. Redistributions of source code must retain the above copyright notice, this
011: * list of conditions and the following disclaimer.
012: * 2. Redistributions in binary form must reproduce the above copyright notice,
013: * this list of conditions and the following disclaimer in the documentation
014: * and/or other materials provided with the distribution.
015: * 3. The name of the author may not be used to endorse or promote products
016: * derived from this software without specific prior written permission.
017: *
018: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
019: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
020: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
021: * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
022: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
023: * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
024: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
025: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
026: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
027: *
028: */
029:
030: package snmp;
031:
032: import java.io.*;
033: import java.net.*;
034:
035: /**
036: * The class SNMPInformRequestSenderInterface implements an interface for sending SNMPv2 inform request
037: * messages to a remote SNMP manager. The approach is that from version 2c of SNMP, using no encryption of data.
038: * Communication occurs via UDP, port 162, the standard SNMP trap port, as the destination port, unless an
039: * alternate (non-standard) port is specified in the constructor.
040: */
041:
042: public class SNMPInformRequestSenderInterface {
043: public static final int SNMP_TRAP_PORT = 162;
044:
045: private int remotePort = SNMP_TRAP_PORT;
046: private DatagramSocket dSocket;
047:
048: /**
049: * Construct a new inform request sender object to send inform requests to remote SNMP hosts.
050: */
051:
052: public SNMPInformRequestSenderInterface() throws SocketException {
053: this (SNMP_TRAP_PORT);
054: }
055:
056: /**
057: * Construct a new inform request sender object to send inform requests to remote SNMP hosts,
058: * using the specified destination port.
059: */
060:
061: public SNMPInformRequestSenderInterface(int remotePort)
062: throws SocketException {
063: this .remotePort = remotePort;
064: dSocket = new DatagramSocket();
065: }
066:
067: /**
068: * Send the supplied SNMPv2 inform request pdu to the specified host, using the supplied version number
069: * and community name.
070: */
071:
072: public void sendInformRequest(int version, InetAddress hostAddress,
073: String community, SNMPv2InformRequestPDU pdu)
074: throws IOException {
075: SNMPMessage message = new SNMPMessage(version, community, pdu);
076:
077: byte[] messageEncoding = message.getBEREncoding();
078:
079: /*
080: System.out.println("Request Message bytes:");
081:
082: for (int i = 0; i < messageEncoding.length; ++i)
083: System.out.print(hexByte(messageEncoding[i]) + " ");
084: */
085:
086: DatagramPacket outPacket = new DatagramPacket(messageEncoding,
087: messageEncoding.length, hostAddress, remotePort);
088:
089: /*
090: System.out.println("Message bytes length (out): " + outPacket.getLength());
091:
092: System.out.println("Message bytes (out):");
093: for (int i = 0; i < messageEncoding.length; ++i)
094: {
095: System.out.print(hexByte(messageEncoding[i]) + " ");
096: }
097: System.out.println("\n");
098: */
099:
100: dSocket.send(outPacket);
101:
102: }
103:
104: /**
105: * Send the supplied inform request pdu to the specified host, using the supplied community name and
106: * using 1 for the version field in the SNMP message.
107: */
108:
109: public void sendInformRequest(InetAddress hostAddress,
110: String community, SNMPv2InformRequestPDU pdu)
111: throws IOException {
112: int version = 1;
113:
114: sendInformRequest(version, hostAddress, community, pdu);
115: }
116:
117: private String hexByte(byte b) {
118: int pos = b;
119: if (pos < 0)
120: pos += 256;
121: String returnString = new String();
122: returnString += Integer.toHexString(pos / 16);
123: returnString += Integer.toHexString(pos % 16);
124: return returnString;
125: }
126:
127: private String getHex(byte theByte) {
128: int b = theByte;
129:
130: if (b < 0)
131: b += 256;
132:
133: String returnString = new String(Integer.toHexString(b));
134:
135: // add leading 0 if needed
136: if (returnString.length() % 2 == 1)
137: returnString = "0" + returnString;
138:
139: return returnString;
140: }
141:
142: }
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