org.opennms.netmgt.scriptd.helper
Class SnmpTrapHelper

java.lang.Object
  org.opennms.netmgt.scriptd.helper.SnmpTrapHelper

public class SnmpTrapHelper
extends Object

This "helper" class provides a convenience interface for generating and forwarding SNMP traps. This class was created in order to make it easier to write simple scripts to generate traps based on events or to forward traps, using scripting languages that are able to access Java classes (such as BeanShell).

Author:

Jim Doble , OpenNMS.org

Constructor Summary

SnmpTrapHelper()
Constructs a new SNMPTrapHelper.

Method Summary

void	addVarBinding(SnmpTrapBuilder trap, String name, String type, String value) Crate a new variable binding and add it to the specified SNMP V1 trap.
void	addVarBinding(SnmpTrapBuilder trap, String name, String type, String encoding, String value) Crate a new variable binding and add it to the specified SNMP V1 trap.
SnmpV1TrapBuilder	createV1Trap(String entId, String agentAddr, int generic, int specific, long timeStamp) Create an SNMP V1 trap with the specified enterprise IS, agent address, generic ID, specific ID, and time stamp.
SnmpTrapBuilder	createV2Trap(String trapOid, String sysUpTime) Create an SNMP V2 trap with the specified trap object ID, and sysUpTime value.
void	forwardTrap(Event event, String destAddr, int destPort) Create an SNMP trap, based on the content of the specified event, and forward the trap to the specified address and port.
void	forwardV1Trap(Event event, String destAddr, int destPort) Create an SNMP V1 trap, based on the content of the specified event, and forward the trap to the specified address and port.
void	forwardV2Trap(Event event, String destAddr, int destPort) Create an SNMP V2 trap, based on the content of the specified event, and forward the trap to the specified address and port.
void	sendTL1AutonomousMsgTrap(Event event, String destAddr, int destPort, String trapVersion, String community) Create an SNMP trap, based on the content of an event derived from a TL1 autonomous message received by Tl1d, and forward the trap to the specified address and port.
void	stop() Stops the SnmpTrapHelper.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SnmpTrapHelper

public SnmpTrapHelper()

Constructs a new SNMPTrapHelper.

Method Detail

stop

public void stop()

Stops the SnmpTrapHelper. If there is a valid SnmpTrapSession, that trap session is stopped.

createV1Trap

public SnmpV1TrapBuilder createV1Trap(String entId,
                                      String agentAddr,
                                      int generic,
                                      int specific,
                                      long timeStamp)
                               throws UnknownHostException

Create an SNMP V1 trap with the specified enterprise IS, agent address, generic ID, specific ID, and time stamp.

Parameters:

entId - The enterprise ID for the trap.

agentAddr - The agent address for the trap.

generic - The generic ID for the trap.

specific - The specific ID for the trap.

timeStamp - The time stamp for the trap.

Returns:

The newly-created trap.

Throws:

UnknownHostException

createV2Trap

public SnmpTrapBuilder createV2Trap(String trapOid,
                                    String sysUpTime)
                             throws SnmpTrapHelperException

Create an SNMP V2 trap with the specified trap object ID, and sysUpTime value.

Parameters:

trapOid - The trap object id.

sysUpTime - The system up time.

Returns:

The newly-created trap.

Throws:

Throws - SnmpTrapHelperException if the trap cannot be created for any reason.

SnmpTrapHelperException

addVarBinding

public void addVarBinding(SnmpTrapBuilder trap,
                          String name,
                          String type,
                          String value)
                   throws SnmpTrapHelperException

Crate a new variable binding and add it to the specified SNMP V1 trap. The value encoding is assumed to be XML_ENCODING_TEXT.

Parameters:

trap - The trap to which the variable binding should be added.

name - The name (a.k.a. "id") of the variable binding to be created

type - The type of variable binding to be created

value - The variable binding value

Throws:

Throws - SnmpTrapHelperException if the variable binding cannot be added to the trap for any reason.

SnmpTrapHelperException

addVarBinding

public void addVarBinding(SnmpTrapBuilder trap,
                          String name,
                          String type,
                          String encoding,
                          String value)
                   throws SnmpTrapHelperException

Crate a new variable binding and add it to the specified SNMP V1 trap.

Parameters:

trap - The trap to which the variable binding should be added.

name - The name (a.k.a. "id") of the variable binding to be created

type - The type of variable binding to be created

encoding - Describes the way in which the value content has been encoded (i.e. XML_ENCODING_TEXT, or XML_ENCODING_BASE64)

value - The variable binding value

Throws:

Throws - SnmpTrapHelperException if the variable binding cannot be added to the trap for any reason.

SnmpTrapHelperException

forwardV1Trap

public void forwardV1Trap(Event event,
                          String destAddr,
                          int destPort)
                   throws SnmpTrapHelperException

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).

Parameters:

event - The event upon which the trap content should be based

destAddr - The address to which the trap should be forwarded

destPort - The port to which the trap should be forwarded

Throws:

Throws - SnmpTrapHelperException if the variable binding cannot be added to the trap for any reason.

SnmpTrapHelperException

forwardV2Trap

public void forwardV2Trap(Event event,
                          String destAddr,
                          int destPort)
                   throws SnmpTrapHelperException

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).

Parameters:

event - The event upon which the trap content should be based

destAddr - The address to which the trap should be forwarded

destPort - The port to which the trap should be forwarded

Throws:

Throws - SnmpTrapHelperException if the variable binding cannot be added to the trap for any reason.

SnmpTrapHelperException

forwardTrap

public void forwardTrap(Event event,
                        String destAddr,
                        int destPort)
                 throws SnmpTrapHelperException

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).

Parameters:

event - The event upon which the trap content should be based

destAddr - The address to which the trap should be forwarded

destPort - The port to which the trap should be forwarded

Throws:

Throws - SnmpTrapHelperException if the variable binding cannot be added to the trap for any reason.

SnmpTrapHelperException

sendTL1AutonomousMsgTrap

public void sendTL1AutonomousMsgTrap(Event event,
                                     String destAddr,
                                     int destPort,
                                     String trapVersion,
                                     String community)
                              throws SnmpTrapHelperException,
                                     UnknownHostException

Create an SNMP trap, based on the content of an event derived from a TL1 autonomous message received by Tl1d, and forward the trap to the specified address and port. The type of trap created depends on the value of the "trapVersion" parameter. The "community" parameter determines the SNMP community string of the resulting trap, defaulting to "public".

Parameters:

event - The event upon which the trap content should be based

destAddr - The address to which the trap should be sent

destPort - The port to which the trap should be sent

trapVersion - The SNMP version ("v1" or "v2c") of the trap

community - The SNMP community string for the trap (defaults to "public")

Throws:

SnmpTrapHelperException

UnknownHostException

Throws - SnmpTrapHelperException if the event is not of the appropriate type.

Throws - UnknownHostException if agent-addr resolution fails for the case of an SNMPv1 trap