/**
* Encodes this message and puts the result in the specified byte array. For internal use only.
*
* @param outputBytes An array to receive the resulting encoding.
* @exception ArrayIndexOutOfBoundsException If the result does not fit into the specified array.
*/
public int encodeMessage(byte[] outputBytes) throws SnmpTooBigException {
int encodingLength = 0;
if (data == null) throw new IllegalArgumentException("Data field is null");
//
// Reminder: BerEncoder does backward encoding !
//
try {
BerEncoder benc = new BerEncoder(outputBytes);
benc.openSequence();
benc.putAny(data, dataLength);
benc.putOctetString((community != null) ? community : new byte[0]);
benc.putInteger(version);
benc.closeSequence();
encodingLength = benc.trim();
} catch (ArrayIndexOutOfBoundsException x) {
throw new SnmpTooBigException();
}
return encodingLength;
}
/**
* Initializes this message with the specified <CODE>pdu</CODE>.
*
* <p>This method initializes the data field with an array of <CODE>maxDataLength</CODE> bytes. It
* encodes the <CODE>pdu</CODE>. The resulting encoding is stored in the data field and the length
* of the encoding is stored in <CODE>dataLength</CODE>.
*
* <p>If the encoding length exceeds <CODE>maxDataLength</CODE>, the method throws an exception.
*
* @param pdu The PDU to be encoded.
* @param maxDataLength The maximum length permitted for the data field.
* @exception SnmpStatusException If the specified <CODE>pdu</CODE> is not valid.
* @exception SnmpTooBigException If the resulting encoding does not fit into <CODE>maxDataLength
* </CODE> bytes.
* @exception ArrayIndexOutOfBoundsException If the encoding exceeds <CODE>maxDataLength</CODE>.
* @since 1.5
*/
public void encodeSnmpPdu(SnmpPdu pdu, int maxDataLength)
throws SnmpStatusException, SnmpTooBigException {
//
// The easy work
//
SnmpPduPacket pdupacket = (SnmpPduPacket) pdu;
version = pdupacket.version;
community = pdupacket.community;
address = pdupacket.address;
port = pdupacket.port;
//
// Allocate the array to receive the encoding.
//
data = new byte[maxDataLength];
//
// Encode the pdupacket
// Reminder: BerEncoder does backward encoding !
//
try {
BerEncoder benc = new BerEncoder(data);
benc.openSequence();
encodeVarBindList(benc, pdupacket.varBindList);
switch (pdupacket.type) {
case pduGetRequestPdu:
case pduGetNextRequestPdu:
case pduInformRequestPdu:
case pduGetResponsePdu:
case pduSetRequestPdu:
case pduV2TrapPdu:
case pduReportPdu:
SnmpPduRequest reqPdu = (SnmpPduRequest) pdupacket;
benc.putInteger(reqPdu.errorIndex);
benc.putInteger(reqPdu.errorStatus);
benc.putInteger(reqPdu.requestId);
break;
case pduGetBulkRequestPdu:
SnmpPduBulk bulkPdu = (SnmpPduBulk) pdupacket;
benc.putInteger(bulkPdu.maxRepetitions);
benc.putInteger(bulkPdu.nonRepeaters);
benc.putInteger(bulkPdu.requestId);
break;
case pduV1TrapPdu:
SnmpPduTrap trapPdu = (SnmpPduTrap) pdupacket;
benc.putInteger(trapPdu.timeStamp, SnmpValue.TimeticksTag);
benc.putInteger(trapPdu.specificTrap);
benc.putInteger(trapPdu.genericTrap);
if (trapPdu.agentAddr != null)
benc.putOctetString(trapPdu.agentAddr.byteValue(), SnmpValue.IpAddressTag);
else benc.putOctetString(new byte[0], SnmpValue.IpAddressTag);
benc.putOid(trapPdu.enterprise.longValue());
break;
default:
throw new SnmpStatusException("Invalid pdu type " + String.valueOf(pdupacket.type));
}
benc.closeSequence(pdupacket.type);
dataLength = benc.trim();
} catch (ArrayIndexOutOfBoundsException x) {
throw new SnmpTooBigException();
}
}
