@Override
protected void validate() {
//
// verify the type
//
if (m_pdu.typeId() != (byte) (SnmpPduPacket.V2TRAP)) {
// if not V2 trap, do nothing
throw new IllegalArgumentException(
"Received not SNMPv2 Trap from host "
+ getTrapAddress()
+ "PDU Type = "
+ m_pdu.getCommand());
}
if (log().isDebugEnabled()) {
log().debug("V2 trap numVars or pdu length: " + getPduLength());
}
if (getPduLength() < 2) // check number of varbinds
{
throw new IllegalArgumentException(
"V2 trap from "
+ getTrapAddress()
+ " IGNORED due to not having the required varbinds. Have "
+ getPduLength()
+ ", needed 2");
}
// The first varbind has the sysUpTime
// Modify the sysUpTime varbind to add the trailing 0 if it is
// missing
// The second varbind has the snmpTrapOID
// Confirm that these two are present
//
String varBindName0 = m_pdu.getVarBindAt(0).getName().toString();
String varBindName1 = m_pdu.getVarBindAt(1).getName().toString();
if (varBindName0.equals(V2TrapInformation.EXTREME_SNMP_SYSUPTIME_OID)) {
log()
.info(
"V2 trap from "
+ getTrapAddress()
+ " has been corrected due to the sysUptime.0 varbind not having been sent with a trailing 0.\n\tVarbinds received are : "
+ varBindName0
+ " and "
+ varBindName1);
varBindName0 = V2TrapInformation.SNMP_SYSUPTIME_OID;
}
if ((!(varBindName0.equals(V2TrapInformation.SNMP_SYSUPTIME_OID)))
|| (!(varBindName1.equals(V2TrapInformation.SNMP_TRAP_OID)))) {
throw new IllegalArgumentException(
"V2 trap from "
+ getTrapAddress()
+ " IGNORED due to not having the required varbinds.\n\tThe first varbind must be sysUpTime.0 and the second snmpTrapOID.0\n\tVarbinds received are : "
+ varBindName0
+ " and "
+ varBindName1);
}
}
@Override
protected TrapIdentity getTrapIdentity() {
// Get the value for the snmpTrapOID
SnmpObjectId snmpTrapOid =
(SnmpObjectId) m_pdu.getVarBindAt(V2TrapInformation.SNMP_TRAP_OID_INDEX).getValue();
SnmpObjectId lastVarBindOid = m_pdu.getVarBindAt(getPduLength() - 1).getName();
SnmpSyntax lastVarBindValue = m_pdu.getVarBindAt(getPduLength() - 1).getValue();
return new TrapIdentity(
SnmpObjId.get(snmpTrapOid.getIdentifiers()),
SnmpObjId.get(lastVarBindOid.getIdentifiers()),
new JoeSnmpValue(lastVarBindValue));
}
@Override
protected long getTimeStamp() {
if (log().isDebugEnabled()) {
log().debug("V2 trap first varbind value: " + m_pdu.getVarBindAt(0).getValue().toString());
}
switch (m_pdu.getVarBindAt(V2TrapInformation.SNMP_SYSUPTIME_OID_INDEX).getValue().typeId()) {
case SnmpSMI.SMI_TIMETICKS:
log().debug("V2 trap first varbind value is of type TIMETICKS (correct)");
return ((SnmpTimeTicks)
m_pdu.getVarBindAt(V2TrapInformation.SNMP_SYSUPTIME_OID_INDEX).getValue())
.getValue();
case SnmpSMI.SMI_INTEGER:
log().debug("V2 trap first varbind value is of type INTEGER, casting to TIMETICKS");
return ((SnmpInt32)
m_pdu.getVarBindAt(V2TrapInformation.SNMP_SYSUPTIME_OID_INDEX).getValue())
.getValue();
default:
throw new IllegalArgumentException(
"V2 trap does not have the required first varbind as TIMETICKS - cannot process trap");
}
}
@Override
protected int getPduLength() {
return m_pdu.getLength();
}
private SnmpVarBind getVarBindAt(int index) {
return m_pdu.getVarBindAt(index);
}