/**
* Create an SNMP V1 trap, based on the content of the specified event, and forward the trap to
* the specified address and port. It is assumed that the specified event represents an SNMP V1 or
* V2 trap that was received by OpenNMS (TrapD).
*
* @param event The event upon which the trap content should be based
* @param destAddr The address to which the trap should be forwarded
* @param destPort The port to which the trap should be forwarded
* @exception Throws SnmpTrapHelperException if the variable binding cannot be added to the trap
* for any reason.
* @throws org.opennms.netmgt.scriptd.helper.SnmpTrapHelperException if any.
*/
public void forwardV1Trap(Event event, String destAddr, int destPort)
throws SnmpTrapHelperException {
// the event must correspond to an SNMP trap
Snmp snmpInfo = event.getSnmp();
if (snmpInfo == null) {
throw new SnmpTrapHelperException(
"Cannot forward an event with no SNMP info: " + event.getUei());
}
// check the version of the original trap
String version = snmpInfo.getVersion();
SnmpV1TrapBuilder trap = SnmpUtils.getV1TrapBuilder();
if ("v1".equals(version)) {
trap.setEnterprise(SnmpObjId.get(snmpInfo.getId()));
InetAddress agentAddress;
agentAddress = InetAddressUtils.addr(event.getSnmphost());
if (agentAddress == null) {
throw new SnmpTrapHelperException("Invalid ip address.");
}
trap.setAgentAddress(agentAddress);
if (snmpInfo.hasGeneric()) {
trap.setGeneric(snmpInfo.getGeneric());
}
if (snmpInfo.hasSpecific()) {
trap.setSpecific(snmpInfo.getSpecific());
}
trap.setTimeStamp(snmpInfo.getTimeStamp());
// varbinds
int i = 0;
for (Parm parm : event.getParmCollection()) {
try {
Value value = parm.getValue();
addVarBinding(
trap, parm.getParmName(), value.getType(), value.getEncoding(), value.getContent());
} catch (SnmpTrapHelperException e) {
throw new SnmpTrapHelperException(e.getMessage() + " in event parm[" + i + "]");
} finally {
i++;
}
}
} else if ("v2".equals(version)) {
// converting V2 trap to V1 (see RFC2576)
trap.setEnterprise(SnmpObjId.get(snmpInfo.getId()));
String addr = null;
for (Parm parm : event.getParmCollection()) {
if (SNMP_TRAP_ADDRESS_OID.equals(parm.getParmName())) {
addr = parm.getValue().getContent();
break;
}
}
if (addr == null) {
addr = "0.0.0.0";
}
InetAddress agentAddress;
agentAddress = InetAddressUtils.addr(addr);
if (agentAddress == null) {
throw new SnmpTrapHelperException("Invalid ip address.");
}
trap.setAgentAddress(agentAddress);
trap.setGeneric(snmpInfo.getGeneric());
trap.setSpecific(snmpInfo.getSpecific());
trap.setTimeStamp(snmpInfo.getTimeStamp());
// varbinds
int i = 0;
for (Parm parm : event.getParmCollection()) {
Value value = parm.getValue();
// omit any parms with type=Counter64
if (!(EventConstants.TYPE_SNMP_COUNTER64.equals(value.getType()))) {
try {
addVarBinding(
trap, parm.getParmName(), value.getType(), value.getEncoding(), value.getContent());
} catch (SnmpTrapHelperException e) {
throw new SnmpTrapHelperException(e.getMessage() + " in event parm[" + i + "]");
}
}
i++;
}
} else {
throw new SnmpTrapHelperException("Invalid SNMP version: " + version);
}
// send the trap
sendTrap(destAddr, destPort, snmpInfo.getCommunity(), trap);
}
