Hi to everybody,
I'm new to the SNMP protocol but I had to implement an Agent in v3.
Using SNMP4J I've implemented and all works fine except the agent cannot
be discovered automatically from the Network Discovery functions.
I guess I forgot to insert something in the configuration. I post here
the Agent class and the way I use it in the software:
public class SNMPAgent extends BaseAgent {
private final String GROUP_NAME = "v3group";
private String address;
private String baseOID;
private String securityName; // User
private String SHAPassword;
private String AES128Passphrase;
private String trapIPAddress;
private String trapPort;
/**
*
* @param address
* @throws IOException
*/
public SNMPAgent(String address, String baseOID,
String securityName, String SHAPassword, String
AES128Passphrase, String trapIPAddress, String trapPort) throws
IOException {
/**
* Creates a base agent with boot-counter, config file, and
a
* CommandProcessor for processing SNMP requests.
Parameters:
* "bootCounterFile" - a file with serialized boot-counter
information
* (read/write). If the file does not exist it is created on
shutdown of
* the agent. "configFile" - a file with serialized
configuration
* information (read/write). If the file does not exist it
is created on
* shutdown of the agent. "commandProcessor" - the
CommandProcessor
* instance that handles the SNMP requests.
*/
super(new File("conf.agent"), new File("bootCounter.agent"),
new CommandProcessor(
new
OctetString(MPv3.createLocalEngineID())));
this.address = address;
this.baseOID = baseOID;
this.securityName = securityName;
this.SHAPassword = SHAPassword;
this.AES128Passphrase = AES128Passphrase;
this.trapIPAddress = trapIPAddress;
this.trapPort = trapPort;
}
/**
* Adds community to security name mappings needed for SNMPv1 and
SNMPv2c.
*/
@Override
protected void addCommunities(SnmpCommunityMIB communityMIB) {
}
/**
* Adds initial notification targets and filters.
*/
@Override
protected void addNotificationTargets(final SnmpTargetMIB targetMIB,
final SnmpNotificationMIB notificationMIB) {
}
/**
* Adds all the necessary initial users to the USM.
*/
@Override
protected void addUsmUser(USM usm)
{
UsmUser user = new UsmUser(
new OctetString(securityName),
AuthSHA.ID,
new OctetString(SHAPassword),
PrivAES128.ID,
new OctetString(AES128Passphrase)
);
usm.addUser(user.getSecurityName(), null, user);
}
/**
* Adds initial VACM configuration.
*/
@Override
protected void addViews(VacmMIB vacm)
{
vacm.addGroup(
SecurityModel.SECURITY_MODEL_USM,
new OctetString(securityName),
new OctetString(GROUP_NAME),
StorageType.nonVolatile
);
vacm.addAccess(
new OctetString(GROUP_NAME),
new OctetString(),
SecurityModel.SECURITY_MODEL_USM,
SecurityLevel.AUTH_PRIV,
MutableVACM.VACM_MATCH_EXACT,
new OctetString("fullReadView"),
new OctetString("fullWriteView"),
new OctetString("fullNotifyView"),
StorageType.nonVolatile
);
vacm.addViewTreeFamily(
new OctetString("fullReadView"),
new OID(baseOID),
new OctetString(),
VacmMIB.vacmViewIncluded,
StorageType.nonVolatile
);
vacm.addViewTreeFamily(
new OctetString("fullWriteView"),
new OID(baseOID),
new OctetString(),
VacmMIB.vacmViewIncluded,
StorageType.nonVolatile
);
vacm.addViewTreeFamily(new OctetString("fullReadView"), new
OID("1.3"),
new OctetString(), VacmMIB.vacmViewIncluded,
StorageType.nonVolatile);
}
/**
* Unregister the basic MIB modules from the agent's MOServer.
*/
@Override
protected void unregisterManagedObjects() {
// TODO Auto-generated method stub
}
/**
* Register additional managed objects at the agent's server.
*/
@Override
protected void registerManagedObjects() {
// TODO Auto-generated method stub
}
protected void initTransportMappings() throws IOException {
transportMappings = new TransportMapping[1];
Address addr = GenericAddress.parse(address);
TransportMapping tm = TransportMappings.getInstance()
.createTransportMapping(addr);
transportMappings[0] = tm;
}
/**
* Start method invokes some initialization methods needed to start
the
* agent
*
* @throws IOException
*/
public void start() throws IOException {
init();
// This method reads some old config from a file and causes
// unexpected behavior.
// loadConfig(ImportModes.REPLACE_CREATE);
addShutdownHook();
//getServer().addContext(new OctetString("public"));
finishInit();
run();
sendColdStartNotification();
}
/**
* Clients can register the MO they need
*/
public void registerManagedObject(ManagedObject mo) {
try {
server.register(mo, null);
} catch (DuplicateRegistrationException ex) {
throw new RuntimeException(ex);
}
}
public void unregisterManagedObject(MOGroup moGroup) {
moGroup.unregisterMOs(server, getContext(moGroup));
}
}
I user the Agent in this way:
agent = new SNMPAgent(
LOCALHOST + '/' + configuration.getAgentSnmpPort(),
configuration.getAgentBaseOID(),
configuration.getAgentSnmpUser(),
configuration.getAgentSHAPassword(),
configuration.getAgentAES128PassPhrase(),
configuration.getTrapDestIPAddress(),
configuration.getTrapPort());
agent.start();
// Since BaseAgent registers some mibs by default we need to unregister
// one before we register our own sysDescr. Normally you would
// override that method and register the mibs that you need
agent.unregisterManagedObject(agent.getSnmpv2MIB());
// Register a system description, use one from you product environment
// to test with
agent.registerManagedObject(MOCreator.createReadOnly(sysDescr,SYS_DESCRIPTION));
agent.registerManagedObject(MOCreator.createReadOnly(sysObjectID, new
OID(configuration.getAgentBaseOID())));
agent.registerManagedObject(MOCreator.createReadOnly(sysContact,SYS_CONTACT));
agent.registerManagedObject(MOCreator.createReadOnly(sysName,SYS_NAME));
agent.registerManagedObject(MOCreator.createReadOnly(sysLocation,SYS_LOCATION));
agent.registerManagedObject(MOCreator.createReadOnly(sysServices,SYS_SERVICES));
MOSSysUpTime = MOCreator.createReadWrite(sysUpTime, new
TimeTicks((long)0));
agent.registerManagedObject(MOSSysUpTime);
I thank you in advance everybody will answer me.
Denis
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