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/*
* Copyright 2017 Huawei Technologies Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onap.cli.fw.snmp.cmd;
import org.onap.cli.fw.cmd.OnapCommand;
import org.onap.cli.fw.error.OnapCommandException;
import org.onap.cli.fw.input.OnapCommandParameter;
import org.onap.cli.fw.schema.OnapCommandSchema;
import org.onap.cli.fw.snmp.conf.OnapCommandSnmpConstants;
import org.onap.cli.fw.snmp.exception.OnapSnmpErrorResponse;
import org.onap.cli.fw.snmp.schema.OnapCommandSchemaSnmpLoader;
import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.Target;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.Address;
import org.snmp4j.smi.GenericAddress;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Vector;
/**
* Oclip snmp Command.
*
*/
@OnapCommandSchema(type = OnapCommandSnmpConstants.SNMP_SCHEMA_PROFILE)
public class OnapSnmpCommand extends OnapCommand {
private List<Map<String, String>> resultMap;
private String version;
private String command;
public OnapSnmpCommand() {
super.addDefaultSchemas(OnapCommandSnmpConstants.DEFAULT_PARAMETER_SNMP_FILE_NAME);
}
private String getAgent() {
OnapCommandParameter onapCommandParameter = this.getParametersMap().get(OnapCommandSnmpConstants.SNMP_AGENT);
return (String) onapCommandParameter.getValue();
}
private PDU getPDU(Integer commandType, String[] oids) {
PDU pdu = new PDU();
for (String oid: oids) {
pdu.add(new VariableBinding(new OID(oid)));
}
pdu.setType(commandType);
return pdu;
}
private Target getTarget() throws OnapCommandException { //NOSONAR
Address targetAddress = GenericAddress.parse(this.getAgent()); //udp:127.0.0.1/161
CommunityTarget target = new CommunityTarget();
target.setCommunity(new OctetString(OnapCommandSnmpConstants.SNMP_COMMNUNITY_STRING));
target.setAddress(targetAddress);
target.setRetries(OnapCommandSnmpConstants.RETRY_COUNT);
target.setTimeout(OnapCommandSnmpConstants.TIMEOUT);
switch (this.getSnmpVersion()) {
case OnapCommandSnmpConstants.SNMP_VERSION_V1:
target.setVersion(SnmpConstants.version1);
break;
case OnapCommandSnmpConstants.SNMP_VERSION_V2C:
target.setVersion(SnmpConstants.version2c);
break;
default:
break;
}
return target;
}
@Override
protected void run() throws OnapCommandException {
try {
// set JVM constant to avoid delay by snmp4j
System.setProperty("java.security.egd", "file:data/./urandom");
DefaultUdpTransportMapping defaultUdpTransportMapping = new DefaultUdpTransportMapping();
defaultUdpTransportMapping.listen();
Snmp snmp = new Snmp(defaultUdpTransportMapping);
List<String> oids = new ArrayList<>();
for (Map<String, String> map: resultMap) {
oids.addAll(map.values());
}
String[] oidStrArr = oids.toArray(new String[oids.size()]);
if (OnapCommandSnmpConstants.SNMP_CMD_GET.equals(this.command)) {
ResponseEvent responseEvent = snmp.send(getPDU(PDU.GET, oidStrArr), getTarget(), null);
if ( responseEvent != null) {
if (responseEvent.getResponse().getErrorStatus() == PDU.noError) {
Vector<? extends VariableBinding> variableBindings = responseEvent.
getResponse().getVariableBindings();
variableBindings.stream().forEach(varBinding -> { //NOSONAR
String key = getKeyForValue(varBinding.getOid().toString());
if (key != null) {
this.getResult().getRecordsMap().get(key).getValues().add(
varBinding.getVariable().toString());
}
});
} else {
throw new OnapSnmpErrorResponse("Error response from SNMP agent",
responseEvent.getResponse().getErrorStatus());
}
} else {
throw new OnapSnmpErrorResponse("Failed to send SNMP GET command");
}
}
snmp.close();
} catch (IOException ex) {
throw new OnapSnmpErrorResponse(ex);
}
}
private String getKeyForValue(String value) {
Optional<Map<String, String>> mapOptional = resultMap.stream().filter(map -> map.values().contains(value)).findFirst(); //NOSONAR
if (!mapOptional.isPresent()) {
return null;
}
return mapOptional.get().keySet().iterator().next();
}
@Override
protected List<String> initializeProfileSchema(Map<String, ?> schemaMap, boolean validate) throws OnapCommandException {
return OnapCommandSchemaSnmpLoader.parseSnmpSchema(this, schemaMap, validate);
}
public String getSnmpVersion() {
return version;
}
public void setSnmpVersion(String version) {
this.version = version;
}
public String getCommand() {
return command;
}
public void setCommand(String command) {
this.command = command;
}
public List<Map<String, String>> getResultMap() {
return resultMap;
}
public void setResultMap(List<Map<String, String>> resultMap) {
this.resultMap = resultMap;
}
}
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