/**
* Create a new PDU of the specified type from the supplied BER encoding.
*
* @throws SNMPBadValueException Indicates invalid SNMP PDU encoding supplied in enc.
*/
protected SNMPv2TrapPDU(byte[] enc) throws SNMPBadValueException {
super(enc, SNMPBERCodec.SNMPv2TRAP);
// validate the message: make sure the first two components of the varBindList
// are the appropriate variable pairs
SNMPSequence varBindList = this.getVarBindList();
if (varBindList.size() < 2) {
throw new SNMPBadValueException("Bad v2 Trap PDU: missing snmpTrapOID or sysUptime");
}
// validate that the first variable binding is the sysUptime
SNMPSequence variablePair = (SNMPSequence) varBindList.getSNMPObjectAt(0);
SNMPObjectIdentifier oid = (SNMPObjectIdentifier) variablePair.getSNMPObjectAt(0);
SNMPObject value = variablePair.getSNMPObjectAt(1);
SNMPObjectIdentifier sysUptimeOID = new SNMPObjectIdentifier("1.3.6.1.2.1.1.3.0");
if (!(value instanceof SNMPTimeTicks) || !oid.equals(sysUptimeOID)) {
throw new SNMPBadValueException("Bad v2 Trap PDU: bad sysUptime in variable binding list");
}
// validate that the second variable binding is the snmpTrapOID
variablePair = (SNMPSequence) varBindList.getSNMPObjectAt(1);
oid = (SNMPObjectIdentifier) variablePair.getSNMPObjectAt(0);
value = variablePair.getSNMPObjectAt(1);
SNMPObjectIdentifier snmpTrapOIDOID = new SNMPObjectIdentifier("1.3.6.1.6.3.1.1.4.1.0");
if (!(value instanceof SNMPObjectIdentifier) || !oid.equals(snmpTrapOIDOID)) {
throw new SNMPBadValueException("Bad v2 Trap PDU: bad snmpTrapOID in variable binding list");
}
}
/**
* Create a new Trap PDU with given trapOID and sysUptime, and containing the supplied SNMP
* sequence as data.
*/
public SNMPv2TrapPDU(
SNMPTimeTicks sysUptime, SNMPObjectIdentifier snmpTrapOID, SNMPSequence varList)
throws SNMPBadValueException {
super(SNMPBERCodec.SNMPv2TRAP, 0, 0, 0, varList);
// create a variable pair for sysUptime, and insert into varBindList
SNMPObjectIdentifier sysUptimeOID = new SNMPObjectIdentifier("1.3.6.1.2.1.1.3.0");
SNMPVariablePair sysUptimePair = new SNMPVariablePair(sysUptimeOID, sysUptime);
varList.insertSNMPObjectAt(sysUptimePair, 0);
// create a variable pair for snmpTrapOID, and insert into varBindList
SNMPObjectIdentifier snmpTrapOIDOID = new SNMPObjectIdentifier("1.3.6.1.6.3.1.1.4.1.0");
SNMPVariablePair snmpOIDPair = new SNMPVariablePair(snmpTrapOIDOID, snmpTrapOID);
varList.insertSNMPObjectAt(snmpOIDPair, 1);
}
/**
* Create a new PDU of the specified type from the supplied BER encoding.
*
* @throws SNMPBadValueException Indicates invalid SNMP PDU encoding supplied in enc.
*/
protected SNMPv1TrapPDU(byte[] enc) throws SNMPBadValueException {
tag = SNMPBERCodec.SNMPTRAP;
extractFromBEREncoding(enc);
// validate the message: make sure we have the appropriate pieces
Vector contents = (Vector) (this.getValue());
if (contents.size() != 6) {
throw new SNMPBadValueException("Bad Trap PDU");
}
if (!(contents.elementAt(0) instanceof SNMPObjectIdentifier)) {
throw new SNMPBadValueException("Bad Trap PDU: bad enterprise OID");
}
if (!(contents.elementAt(1) instanceof SNMPIPAddress)) {
throw new SNMPBadValueException("Bad Trap PDU: bad agent address");
}
if (!(contents.elementAt(2) instanceof SNMPInteger)) {
throw new SNMPBadValueException("Bad Trap PDU: bad generic trap code");
}
if (!(contents.elementAt(3) instanceof SNMPInteger)) {
throw new SNMPBadValueException("Bad Trap PDU: bad specific trap code");
}
if (!(contents.elementAt(4) instanceof SNMPTimeTicks)) {
throw new SNMPBadValueException("Bad Trap PDU: bad timestamp");
}
if (!(contents.elementAt(5) instanceof SNMPSequence)) {
throw new SNMPBadValueException("Bad Trap PDU: bad variable binding list");
}
// now validate the variable binding list: should be list of sequences which
// are (OID, value) pairs
SNMPSequence varBindList = this.getVarBindList();
for (int i = 0; i < varBindList.size(); i++) {
SNMPObject element = varBindList.getSNMPObjectAt(i);
// must be a two-element sequence
if (!(element instanceof SNMPSequence)) {
throw new SNMPBadValueException("Bad Trap PDU: bad variable binding at index" + i);
}
// variable binding sequence must have 2 elements, first of which must be an object identifier
SNMPSequence varBind = (SNMPSequence) element;
if ((varBind.size() != 2) || !(varBind.getSNMPObjectAt(0) instanceof SNMPObjectIdentifier)) {
throw new SNMPBadValueException("Bad Trap PDU: bad variable binding at index" + i);
}
}
}
/**
* A utility method that extracts the sysUptime from the variable bind list (it's the first of the
* variable pairs).
*/
public SNMPTimeTicks getSysUptime() {
SNMPSequence contents = this.getVarBindList();
SNMPSequence variablePair = (SNMPSequence) contents.getSNMPObjectAt(0);
return (SNMPTimeTicks) variablePair.getSNMPObjectAt(1);
}
/**
* A utility method that extracts the snmpTrapOID from the variable bind list (it's the second of
* the variable pairs).
*/
public SNMPObjectIdentifier getSNMPTrapOID() {
SNMPSequence contents = this.getVarBindList();
SNMPSequence variablePair = (SNMPSequence) contents.getSNMPObjectAt(1);
return (SNMPObjectIdentifier) variablePair.getSNMPObjectAt(1);
}
