如何利用snmp4j-agent在PC端模拟snmp服务
唐宋源码清 2013-06-17
想在PC端起一个snmp模拟器，在网上搜了一段时间，例子也不算少，但一般都有些问题，可能是自己某个地方出错了。
索性直接从源码的example开始，看了几天snmp4j-agent源码后，虽然啥也没看懂，但还是被我找到了一些突破口。
直接将org.snmp4j.agent.example下的例子复制出来，然后修改即可。这几天刚写好的例子，也懒得作修饰了。
1. 将源码中的SampleAgentConfig.properties（org.snmp4j.agent.example下）复制出来。
2. 建立如图的包层次结构
3. 代码明细
SysDate.java
package celul.snmpSeverTest.scalar;
import org.snmp4j.agent.mo.MOAccessImpl;
import org.snmp4j.agent.mo.MOScalar;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
public class SysDate extends MOScalar<OctetString> {
public SysDate() {
super(new OID("1.3.6.1.4.1.12321.1.1.1.2.0"), MOAccessImpl.ACCESS_READ_ONLY,
new OctetString("com"));
}
@Override
public OctetString getValue() {
return new OctetString("com");
}
}SysInitDevice.java
package celul.snmpSeverTest.scalar;
import org.snmp4j.agent.mo.MOAccessImpl;
import org.snmp4j.agent.mo.MOScalar;
import org.snmp4j.smi.Integer32;
import org.snmp4j.smi.OID;
public class SysInitDevice extends MOScalar<Integer32> {
public SysInitDevice() {
super(new OID("1.3.6.1.4.1.12321.1.1.1.3.0"), MOAccessImpl.ACCESS_READ_WRITE,
new Integer32(3));
}
@Override
public Integer32 getValue() {
return super.getValue();
}
@Override
public int setValue(Integer32 value) {
return super.setValue(value);
}
}SysInitParams.java与SysTimeUp.java不再赘述。
MoTableUtil.java
package celul.snmpSeverTest.table;
import org.snmp4j.agent.MOAccess;
import org.snmp4j.agent.mo.DefaultMOMutableTableModel;
import org.snmp4j.agent.mo.DefaultMOTable;
import org.snmp4j.agent.mo.DefaultMOTableRow;
import org.snmp4j.agent.mo.MOAccessImpl;
import org.snmp4j.agent.mo.MOColumn;
import org.snmp4j.agent.mo.MOMutableColumn;
import org.snmp4j.agent.mo.MOTableIndex;
import org.snmp4j.agent.mo.MOTableSubIndex;
import org.snmp4j.agent.mo.snmp.RowStatus;
import org.snmp4j.smi.Integer32;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.SMIConstants;
import org.snmp4j.smi.Variable;
import celul.snmpSeverTest.Constant;
public class MoTableUtil{
@SuppressWarnings("rawtypes")
private static DefaultMOTable emuTable;
private static final String emuTableEntryOid = "1.3.6.1.4.1.19547.1.6.1.1.1";
private static final Object[][] columnEmuDefined = {
{ 1, "1", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 2, "2", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 3, "3", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 4, "4", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 5, "5", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 6, "6", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 7, "7", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 8, "8", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 9, "9", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 10, Constant.ROWSTATUS, MOAccessImpl.ACCESS_READ_CREATE, SMIConstants.SYNTAX_INTEGER32 } };
@SuppressWarnings("rawtypes")
private static DefaultMOTable edfaTable;
private static final String edfaTableEntryOid = "1.3.6.1.4.1.19547.1.6.1.2.1";
private static final Object[][] columnEdfaDefined = {
{ 1, "1", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 2, "2", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 3, "3", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 4, "4", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 5, "5", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 6, "6", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 7, "7", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 8, "8", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 9, "9", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 10, "10", MOAccessImpl.ACCESS_READ_ONLY, SMIConstants.SYNTAX_OCTET_STRING },
{ 11, Constant.ROWSTATUS, MOAccessImpl.ACCESS_READ_CREATE, SMIConstants.SYNTAX_INTEGER32 } };
//private static DefaultMOTable defaTable;
@SuppressWarnings("rawtypes")
public static DefaultMOTable getEmuTable(){
if(emuTable == null){
initEmuTable();
}
return emuTable;
}
@SuppressWarnings("rawtypes")
public static DefaultMOTable getEdfaTable(){
if(edfaTable == null){
initEdfaTable();
}
return edfaTable;
}
@SuppressWarnings({ "rawtypes", "unchecked" })
private static void initEmuTable(){
int columnLength = columnEmuDefined.length;
MOColumn[] edfaColumns = new MOColumn[columnLength];
for( int i=0; i<columnLength; i++){
Object[] acol = columnEmuDefined[i];
int index = (Integer) acol[0];
String name = (String) acol[1];
MOAccess access = (MOAccess) acol[2];
int operType = (Integer) acol[3];
Variable valueDefault = new Integer32(1);
if(name.startsWith(Constant.ROWSTATUS)){
edfaColumns[i] = new RowStatus(index);
}else{
edfaColumns[i] = new MOMutableColumn<Variable>(index, operType, access, valueDefault, true);
}
}
emuTable = new DefaultMOTable(
new OID(emuTableEntryOid),
new MOTableIndex(
new MOTableSubIndex[] {
new MOTableSubIndex(
new OID(emuTableEntryOid + ".1001"),
SMIConstants.SYNTAX_OCTET_STRING, 1, 16) },
true),
edfaColumns,
new DefaultMOMutableTableModel<DefaultMOTableRow>()
);
}
@SuppressWarnings({ "rawtypes", "unchecked" })
private static void initEdfaTable(){
int columnLength = columnEdfaDefined.length;
MOColumn[] edfaColumns = new MOColumn[columnLength];
for( int i=0; i<columnLength; i++){
Object[] acol = columnEdfaDefined[i];
int index = (Integer) acol[0];
String name = (String) acol[1];
MOAccess access = (MOAccess) acol[2];
int operType = (Integer) acol[3];
Variable valueDefault = new Integer32(1);
if(name.startsWith(Constant.ROWSTATUS)){
edfaColumns[i] = new RowStatus(index);
}else{
edfaColumns[i] = new MOMutableColumn<Variable>(index, operType, access, valueDefault, true);
}
}
edfaTable = new DefaultMOTable(
new OID(edfaTableEntryOid),
new MOTableIndex(
new MOTableSubIndex[] {
new MOTableSubIndex(
new OID(edfaTableEntryOid + ".1001"),
SMIConstants.SYNTAX_OCTET_STRING, 1, 16) },
true),
edfaColumns,
new DefaultMOMutableTableModel<DefaultMOTableRow>()
);
}
@SuppressWarnings("unchecked")
public static void fillDefaultDataIntoEmuTable(){
for (int rowId = 1; rowId < 2; rowId++) {
Variable[] values = new Variable[10];
values[0] = new OctetString("a.0." + rowId);
values[1] = new OctetString("b.0." + rowId);
values[2] = new OctetString("c.0." + rowId);
values[3] = new OctetString("d.0." + rowId);
values[4] = new OctetString("e.0." + rowId);
values[5] = new OctetString("f.0." + rowId);
values[6] = new OctetString("g.0." + rowId);
values[7] = new OctetString("h.0." + rowId);
values[8] = new OctetString("i.0." + rowId);
values[9] = new Integer32(rowId);
emuTable.addRow(new DefaultMOTableRow(new OID("1.0." + rowId),
values));
}
}
@SuppressWarnings("unchecked")
public static void fillDefaultDataIntoEdfaTable(){
for (int rowId = 1; rowId < 5; rowId++) {
Variable[] values = new Variable[11];
values[0] = new OctetString("edfa.a.0." + rowId);
values[1] = new OctetString("edfa.b.0." + rowId);
values[2] = new OctetString("edfa.c.0." + rowId);
values[3] = new OctetString("edfa.d.0." + rowId);
values[4] = new OctetString("edfa.e.0." + rowId);
values[5] = new OctetString("edfa.f.0." + rowId);
values[6] = new OctetString("edfa.g.0." + rowId);
values[7] = new OctetString("edfa.h.0." + rowId);
values[8] = new OctetString("edfa.i.0." + rowId);
values[9] = new OctetString("edfa.j.0." + rowId);
values[10] = new Integer32(rowId);
edfaTable.addRow(new DefaultMOTableRow(new OID("1.0." + rowId),
values));
}
}
}Constant.java
public class Constant {
public static final String ROWSTATUS="rowStatus";
}主要入口snmp4jAgent.java
package celul.snmpSeverTest;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import org.apache.log4j.BasicConfigurator;
import org.snmp4j.MessageDispatcher;
import org.snmp4j.MessageDispatcherImpl;
import org.snmp4j.TransportMapping;
import org.snmp4j.agent.AgentConfigManager;
import org.snmp4j.agent.DefaultMOContextScope;
import org.snmp4j.agent.DefaultMOServer;
import org.snmp4j.agent.DuplicateRegistrationException;
import org.snmp4j.agent.MOQuery;
import org.snmp4j.agent.MOQueryWithSource;
import org.snmp4j.agent.MOScope;
import org.snmp4j.agent.MOServer;
import org.snmp4j.agent.ManagedObject;
import org.snmp4j.agent.cfg.EngineBootsCounterFile;
import org.snmp4j.agent.io.DefaultMOPersistenceProvider;
import org.snmp4j.agent.io.MOInput;
import org.snmp4j.agent.io.MOInputFactory;
import org.snmp4j.agent.io.prop.PropertyMOInput;
import org.snmp4j.agent.mo.util.VariableProvider;
import org.snmp4j.agent.request.Request;
import org.snmp4j.agent.request.RequestStatus;
import org.snmp4j.agent.request.SubRequest;
import org.snmp4j.agent.request.SubRequestIterator;
import org.snmp4j.log.Log4jLogFactory;
import org.snmp4j.log.LogAdapter;
import org.snmp4j.log.LogFactory;
import org.snmp4j.log.LogLevel;
import org.snmp4j.mp.MPv3;
import org.snmp4j.security.SecurityProtocols;
import org.snmp4j.smi.Address;
import org.snmp4j.smi.GenericAddress;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.Variable;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.TransportMappings;
import org.snmp4j.util.ThreadPool;
import celul.snmpSeverTest.scalar.SysDate;
import celul.snmpSeverTest.scalar.SysInitDevice;
import celul.snmpSeverTest.scalar.SysInitParams;
import celul.snmpSeverTest.scalar.SysTimeUp;
import celul.snmpSeverTest.table.MoTableUtil;
public class SNMP4JAgent implements VariableProvider {
static{
LogFactory.setLogFactory(new Log4jLogFactory());
BasicConfigurator.configure();
LogFactory.getLogFactory().getRootLogger().setLogLevel(LogLevel.ALL);
}
private LogAdapter logger = LogFactory.getLogger(SNMP4JAgent.class);
protected AgentConfigManager agent;
protected MOServer server;
private String configFile;
private File bootCounterFile;
public SNMP4JAgent(){
configFile = "configFile.cfg";
bootCounterFile = new File("bootCounterFile.bc");
server = new DefaultMOServer();
MOServer[] moServers = new MOServer[] { server };
final Properties props = new Properties();
try {
props.load(SNMP4JAgent.class.getResourceAsStream("SampleAgentConfig.properties"));
} catch (IOException ex) {
ex.printStackTrace();
}
MOInputFactory configurationFactory = new MOInputFactory(){
@Override
public MOInput createMOInput() {
return new PropertyMOInput(props, SNMP4JAgent.this);
}
};
MessageDispatcher messageDispatcher = new MessageDispatcherImpl();
List<String> list = new ArrayList<String>();
list.add("udp:0.0.0.0/161");
addListenAddresses(messageDispatcher,list);
agent = new AgentConfigManager(
new OctetString(MPv3.createLocalEngineID()),
messageDispatcher,
null,
moServers,
ThreadPool.create("snmp4JAgent", 3),
configurationFactory,
new DefaultMOPersistenceProvider(moServers, configFile),
new EngineBootsCounterFile(bootCounterFile)
);
}
@Override
public Variable getVariable(String name) {
OID oid;
OctetString context = null;
int pos = name.indexOf(':');
if (pos >= 0) {
context = new OctetString(name.substring(0, pos));
oid = new OID(name.substring(pos + 1, name.length()));
} else {
oid = new OID(name);
}
final DefaultMOContextScope scope = new DefaultMOContextScope(context,
oid, true, oid, true);
MOQuery query = new MOQueryWithSource(scope, false, this);
ManagedObject mo = server.lookup(query);
if (mo != null) {
final VariableBinding vb = new VariableBinding(oid);
final RequestStatus status = new RequestStatus();
SubRequest req = new SubRequest() {
private boolean completed;
private MOQuery query;
public boolean hasError() {
return false;
}
public void setErrorStatus(int errorStatus) {
status.setErrorStatus(errorStatus);
}
public int getErrorStatus() {
return status.getErrorStatus();
}
public RequestStatus getStatus() {
return status;
}
public MOScope getScope() {
return scope;
}
public VariableBinding getVariableBinding() {
return vb;
}
public Request getRequest() {
return null;
}
public Object getUndoValue() {
return null;
}
public void setUndoValue(Object undoInformation) {
}
public void completed() {
completed = true;
}
public boolean isComplete() {
return completed;
}
public void setTargetMO(ManagedObject managedObject) {
}
public ManagedObject getTargetMO() {
return null;
}
public int getIndex() {
return 0;
}
public void setQuery(MOQuery query) {
this.query = query;
}
public MOQuery getQuery() {
return query;
}
public SubRequestIterator repetitions() {
return null;
}
public void updateNextRepetition() {
}
public Object getUserObject() {
return null;
}
public void setUserObject(Object userObject) {
}
};
mo.get(req);
return vb.getVariable();
}
return null;
}
protected void addListenAddresses(MessageDispatcher md,
List<String> addresses) {
for (String addressString : addresses) {
Address address = GenericAddress.parse(addressString);
if (address == null) {
logger.fatal("Could not parse address string '" + addressString
+ "'");
return;
}
@SuppressWarnings("rawtypes")
TransportMapping tm = TransportMappings.getInstance().createTransportMapping(address);
if (tm != null) {
md.addTransportMapping(tm);
} else {
logger.warn("No transport mapping available for address '"
+ address + "'.");
}
}
}
public void registerMIBs(){
try {
server.register(new SysTimeUp(), null);
server.register(new SysDate(), null);
server.register(new SysInitDevice(), null);
server.register(new SysInitParams(), null);
server.register(MoTableUtil.getEmuTable(), null);
server.register(MoTableUtil.getEdfaTable(), null);
MoTableUtil.fillDefaultDataIntoEmuTable();
MoTableUtil.fillDefaultDataIntoEdfaTable();
} catch (DuplicateRegistrationException e) {
e.printStackTrace();
}
}
public void run() {
agent.initialize();
registerMIBs();
agent.setupProxyForwarder();
agent.setTableSizeLimits(new Properties());
agent.run();
}
public static void main(String[] args){
SNMP4JAgent sa = new SNMP4JAgent();
SecurityProtocols.getInstance().addDefaultProtocols();
sa.run();
}
}运行snmp4jAgent.java，这样，我们的服务端就已经起来了。通过mibBrowser可以访问。
.1.3.6.1.4.1.19547.1.6.1.1.1.1.1.0.1 a.0.1 .1.3.6.1.4.1.19547.1.6.1.1.1.2.1.0.1 b.0.1 .1.3.6.1.4.1.19547.1.6.1.1.1.3.1.0.1 c.0.1 .1.3.6.1.4.1.19547.1.6.1.1.1.4.1.0.1 d.0.1 .1.3.6.1.4.1.19547.1.6.1.1.1.5.1.0.1 e.0.1 .1.3.6.1.4.1.19547.1.6.1.1.1.6.1.0.1 f.0.1 .1.3.6.1.4.1.19547.1.6.1.1.1.7.1.0.1 g.0.1 .1.3.6.1.4.1.19547.1.6.1.1.1.8.1.0.1 h.0.1 .1.3.6.1.4.1.19547.1.6.1.1.1.9.1.0.1 i.0.1 .1.3.6.1.4.1.19547.1.6.1.1.1.10.1.0.1 1 .1.3.6.1.4.1.19547.1.6.1.2.1.1.1.0.1 edfa.a.0.1 .1.3.6.1.4.1.19547.1.6.1.2.1.1.1.0.2 edfa.a.0.2 .1.3.6.1.4.1.19547.1.6.1.2.1.1.1.0.3 edfa.a.0.3 .1.3.6.1.4.1.19547.1.6.1.2.1.1.1.0.4 edfa.a.0.4 .1.3.6.1.4.1.19547.1.6.1.2.1.2.1.0.1 edfa.b.0.1 .1.3.6.1.4.1.19547.1.6.1.2.1.2.1.0.2 edfa.b.0.2 .1.3.6.1.4.1.19547.1.6.1.2.1.2.1.0.3 edfa.b.0.3 .1.3.6.1.4.1.19547.1.6.1.2.1.2.1.0.4 edfa.b.0.4 .1.3.6.1.4.1.19547.1.6.1.2.1.3.1.0.1 edfa.c.0.1 .1.3.6.1.4.1.19547.1.6.1.2.1.3.1.0.2 edfa.c.0.2 .1.3.6.1.4.1.19547.1.6.1.2.1.3.1.0.3 edfa.c.0.3 .1.3.6.1.4.1.19547.1.6.1.2.1.3.1.0.4 edfa.c.0.4 .1.3.6.1.4.1.19547.1.6.1.2.1.4.1.0.1 edfa.d.0.1 .1.3.6.1.4.1.19547.1.6.1.2.1.4.1.0.2 edfa.d.0.2 .1.3.6.1.4.1.19547.1.6.1.2.1.4.1.0.3 edfa.d.0.3 .1.3.6.1.4.1.19547.1.6.1.2.1.4.1.0.4 edfa.d.0.4 .1.3.6.1.4.1.19547.1.6.1.2.1.5.1.0.1 edfa.e.0.1 .1.3.6.1.4.1.19547.1.6.1.2.1.5.1.0.2 edfa.e.0.2 .1.3.6.1.4.1.19547.1.6.1.2.1.5.1.0.3 edfa.e.0.3 .1.3.6.1.4.1.19547.1.6.1.2.1.5.1.0.4 edfa.e.0.4 .1.3.6.1.4.1.19547.1.6.1.2.1.6.1.0.1 edfa.f.0.1 .1.3.6.1.4.1.19547.1.6.1.2.1.6.1.0.2 edfa.f.0.2 .1.3.6.1.4.1.19547.1.6.1.2.1.6.1.0.3 edfa.f.0.3 .1.3.6.1.4.1.19547.1.6.1.2.1.6.1.0.4 edfa.f.0.4 .1.3.6.1.4.1.19547.1.6.1.2.1.7.1.0.1 edfa.g.0.1 .1.3.6.1.4.1.19547.1.6.1.2.1.7.1.0.2 edfa.g.0.2 .1.3.6.1.4.1.19547.1.6.1.2.1.7.1.0.3 edfa.g.0.3 .1.3.6.1.4.1.19547.1.6.1.2.1.7.1.0.4 edfa.g.0.4 .1.3.6.1.4.1.19547.1.6.1.2.1.8.1.0.1 edfa.h.0.1 .1.3.6.1.4.1.19547.1.6.1.2.1.8.1.0.2 edfa.h.0.2 .1.3.6.1.4.1.19547.1.6.1.2.1.8.1.0.3 edfa.h.0.3 .1.3.6.1.4.1.19547.1.6.1.2.1.8.1.0.4 edfa.h.0.4
.1.3.6.1.4.1.12321.1.1.1.3.0 3
也可以通过snmp4j客户端程序访问该服务器资源。后续再跟踪。
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