/**
* Create an SNMP 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). The type of trap to be created depends on the type
* of the original trap (i.e. if the original trap was an SNMP V1 trap, an SNMP V1 trap will be
* created; if the original trap was an SNMP V2 trap, an SNMP V2 trap will be created).
*
* @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 forwardTrap(Event event, String destAddr, int destPort)
throws SnmpTrapHelperException {
Snmp snmpInfo = event.getSnmp();
if (snmpInfo == null) {
throw new SnmpTrapHelperException(
"Cannot forward an event with no SNMP info: " + event.getUei());
}
String version = snmpInfo.getVersion();
if ("v1".equals(version)) {
forwardV1Trap(event, destAddr, destPort);
} else if ("v2".equals(version)) {
forwardV2Trap(event, destAddr, destPort);
} else {
throw new SnmpTrapHelperException("Invalid SNMP version: " + version);
}
}
/**
* Create an SNMP V2 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 forwardV2Trap(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();
SnmpTrapBuilder packet = SnmpUtils.getV2TrapBuilder();
if ("v1".equals(version)) {
// converting V1 trap to V2 (see RFC2576)
addVarBinding(
packet,
SNMP_SYSUPTIME_OID,
EventConstants.TYPE_SNMP_TIMETICKS,
Long.toString(snmpInfo.getTimeStamp()));
String oid;
if (snmpInfo.getGeneric() == ENTERPRISE_SPECIFIC && snmpInfo.hasSpecific()) {
oid = snmpInfo.getId() + ".0." + snmpInfo.getSpecific();
} else {
oid = SNMP_TRAPS + '.' + (snmpInfo.getGeneric() + 1);
}
addVarBinding(packet, SNMP_TRAP_OID, EventConstants.TYPE_SNMP_OBJECT_IDENTIFIER, oid);
// add the V1 var bindings
boolean addrPresent = false;
boolean communityPresent = false;
boolean enterprisePresent = false;
int i = 0;
for (Parm parm : event.getParmCollection()) {
Value value = parm.getValue();
try {
addVarBinding(
packet, parm.getParmName(), value.getType(), value.getEncoding(), value.getContent());
} catch (SnmpTrapHelperException e) {
throw new SnmpTrapHelperException(e.getMessage() + " in event parm[" + i + "]");
}
if (SNMP_TRAP_ADDRESS_OID.equals(parm.getParmName())) {
addrPresent = true;
} else if (SNMP_TRAP_COMMUNITY_OID.equals(parm.getParmName())) {
communityPresent = true;
} else if (SNMP_TRAP_ENTERPRISE_OID.equals(parm.getParmName())) {
enterprisePresent = true;
}
i++;
}
if (!addrPresent) {
addVarBinding(
packet, SNMP_TRAP_ADDRESS_OID, EventConstants.TYPE_SNMP_IPADDRESS, event.getSnmphost());
}
if (!communityPresent) {
addVarBinding(
packet,
SNMP_TRAP_COMMUNITY_OID,
EventConstants.TYPE_SNMP_OCTET_STRING,
snmpInfo.getCommunity());
}
if (!enterprisePresent) {
addVarBinding(
packet,
SNMP_TRAP_ENTERPRISE_OID,
EventConstants.TYPE_SNMP_OBJECT_IDENTIFIER,
snmpInfo.getId());
}
} else if ("v2".equals(version)) {
addVarBinding(
packet,
SNMP_SYSUPTIME_OID,
EventConstants.TYPE_SNMP_TIMETICKS,
Long.toString(snmpInfo.getTimeStamp()));
String oid;
if (snmpInfo.getGeneric() == ENTERPRISE_SPECIFIC) {
oid = snmpInfo.getId() + "." + snmpInfo.getSpecific();
} else {
oid = SNMP_TRAPS + '.' + (snmpInfo.getGeneric() + 1);
}
addVarBinding(packet, SNMP_TRAP_OID, EventConstants.TYPE_SNMP_OBJECT_IDENTIFIER, oid);
int i = 0;
for (Parm parm : event.getParmCollection()) {
Value value = parm.getValue();
try {
addVarBinding(
packet, 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(), packet);
}
/**
* 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);
}
