private int getSnmpVersion() {
switch (configuration.getVersion()) {
case VERSION_1:
return SnmpConstants.version1;
case VERSION_2:
case VERSION_2_C:
return SnmpConstants.version2c;
default:
return SnmpConstants.version1;
}
}
private void createSession() throws IOException {
if (snmp == null) {
Address address = GenericAddress.parse(deviceAddress);
AbstractTransportMapping transport;
if (address instanceof TlsAddress) {
transport = new TLSTM();
} else if (address instanceof TcpAddress) {
transport = new DefaultTcpTransportMapping();
} else {
transport = new DefaultUdpTransportMapping();
}
// Could save some CPU cycles:
transport.setAsyncMsgProcessingSupported(false);
snmp = new Snmp(transport);
snmp.listen();
if (getSnmpVersion() == SnmpConstants.version3) {
snmp.getUSM()
.addUser(
new OctetString("user"),
new UsmUser(
new OctetString("user"),
AuthMD5.ID,
new OctetString("user"),
AuthMD5.ID,
null));
// create the target
target = new UserTarget();
target.setSecurityLevel(SecurityLevel.AUTH_NOPRIV);
target.setSecurityName(new OctetString("user"));
} else {
// create the target
target = new CommunityTarget();
((CommunityTarget) target).setCommunity(new OctetString(configuration.getReadCommunity()));
}
target.setAddress(address);
target.setVersion(getSnmpVersion());
target.setRetries(retries);
target.setTimeout(timeout);
}
}