public void Metoda()
{
string host = "localhost";
string community = "public";
SimpleSnmp snmp = new SimpleSnmp(host, community);
if (!snmp.Valid)
{
Console.WriteLine("SNMP agent host name/ip address is invalid.");
return;
}
Dictionary <Oid, AsnType> result = snmp.Get(SnmpVersion.Ver1,
new string[] { ".1.3.6.1.2.1.1.1" });
if (result == null)
{
Console.WriteLine("No results received.");
return;
}
foreach (KeyValuePair <Oid, AsnType> kvp in result)
{
Console.WriteLine("{0}: {1} {2}", kvp.Key.ToString(),
SnmpConstants.GetTypeName(kvp.Value.Type),
kvp.Value.ToString());
}
}
public void QuerySuccessTest()
{
Oid testOid = new Oid("1.3.6.1.2.1.1.1.0");
// test a (hopefully) successful query to a MikroTik
// THIS CAN FAIL IF THE DEVICE HOLDING THE address specified by "testAddress"
// is not available or has no SNMP service running.
using (var snmpll = new SnmpLowerLayer(TestConstants.TestAddressMikrotik1, QuerierOptions.Default.WithProtocolVersion(SnmpVersion.Ver2)))
{
VbCollection result = snmpll.Query(new Oid("1.3.6.1.2.1.1.1.0"));
Assert.NotNull(result, "The query result is null");
Assert.GreaterOrEqual(result.Count, 1, "Empty result list when querying 1 OID");
Assert.NotNull(result[0], "result[0] is null");
Assert.AreEqual(testOid, result[0].Oid, "result[0] is of wrong OID");
Console.WriteLine($"Result for OID {result[0].Oid} is of type '{SnmpConstants.GetTypeName(result[0].Value.Type)}' with value '{result[0].Value}'");
}
// test a (hopefully) successful query to a Ubiquiti device.
// THIS CAN FAIL IF THE DEVICE HOLDING THE address specified by "testAddress"
// is not available or has no SNMP service running.
using (var snmpll = new SnmpLowerLayer(TestConstants.TestAddressUbntAirOs4side1, QuerierOptions.Default.WithProtocolVersion(SnmpVersion.Ver1)))
{
VbCollection result = snmpll.Query(new Oid("1.3.6.1.2.1.1.1.0"));
Assert.NotNull(result, "The query result is null");
Assert.GreaterOrEqual(result.Count, 1, "Empty result list when querying 1 OID");
Assert.NotNull(result[0], "result[0] is null");
Assert.AreEqual(testOid, result[0].Oid, "result[0] is of wrong OID");
Console.WriteLine($"Result for OID {result[0].Oid} is of type '{SnmpConstants.GetTypeName(result[0].Value.Type)}' with value '{result[0].Value}'");
}
}
protected override void ProcessRecord()
{
base.ProcessRecord();
foreach (string node in _IpAddress)
{
_SimpleSnmp.PeerIP = System.Net.IPAddress.Parse(node);
Dictionary <Oid, AsnType> response = _SimpleSnmp.Get(_Version, _Oid);
if (response != null)
{
foreach (KeyValuePair <Oid, AsnType> item in response)
{
if (!item.Key.ToString().Equals("0.0"))
{
PSObject obj = new PSObject();
//PSNoteProperties are not strongly typed but do contain an explicit type.
obj.Properties.Add(new PSNoteProperty("Node", node));
obj.Properties.Add(new PSNoteProperty("OID", item.Key.ToString()));
obj.Properties.Add(new PSNoteProperty("Type", SnmpConstants.GetTypeName(item.Value.Type)));
obj.Properties.Add(new PSNoteProperty("Value", item.Value.ToString()));
WriteObject(obj);
}
}
}
else
{
WriteError(new ErrorRecord(new Exception("OID " + string.Join(", ", _Oid) + " returned Null "), "", ErrorCategory.ProtocolError, null));
}
}
}
private void Snmp_Get(string ip, string oid, string comm)
{
OctetString community = new OctetString(comm);
AgentParameters param = new AgentParameters(community);
param.Version = SnmpVersion.Ver1;
IpAddress agent = new IpAddress(ip);
UdpTarget target = new UdpTarget((IPAddress)agent, 161, 2000, 1);
Pdu pdu = new Pdu(PduType.Get);
pdu.VbList.Add(oid);
SnmpV1Packet result = (SnmpV1Packet)target.Request(pdu, param);
if (result != null)
{
if (result.Pdu.ErrorStatus != 0)
{
this.txtTest.Text += string.Format("Error in SNMP reply. Error {0} index {1} \r\n", result.Pdu.ErrorStatus, result.Pdu.ErrorIndex);
}
else
{
int index = this.dataGridView1.Rows.Add();
this.dataGridView1.Rows[index].Cells[0].Value = "hello";
this.dataGridView1.Rows[index].Cells[1].Value = result.Pdu.VbList[0].Oid.ToString();
this.dataGridView1.Rows[index].Cells[2].Value = SnmpConstants.GetTypeName(result.Pdu.VbList[0].Value.Type);
this.dataGridView1.Rows[index].Cells[3].Value = result.Pdu.VbList[0].Value.ToString();
}
}
}
protected override void ProcessRecord()
{
base.ProcessRecord();
foreach (string node in _IpAddress)
{
IPAddress ip = null;
if (!System.Net.IPAddress.TryParse(node, out ip))
{
ThrowTerminatingError(new ErrorRecord(new Exception("Not a valid ipaddress"), "", ErrorCategory.InvalidData, ""));
}
else
{
_SimpleSnmp.PeerIP = ip;
}
_SimpleSnmp.PeerIP = System.Net.IPAddress.Parse(ip.ToString());
string LastOid = _Oid;
while (LastOid != null)
{
Dictionary <Oid, AsnType> response = _SimpleSnmp.GetNext(_Version, new string[] { LastOid });
if (response != null)
{
foreach (KeyValuePair <Oid, AsnType> item in response)
{
if (!item.Key.ToString().Equals("0.0"))
{
PSObject obj = new PSObject();
obj.Properties.Add(new PSNoteProperty("Node", node));
obj.Properties.Add(new PSNoteProperty("OID", item.Key.ToString()));
obj.Properties.Add(new PSNoteProperty("Type", SnmpConstants.GetTypeName(item.Value.Type)));
obj.Properties.Add(new PSNoteProperty("Value", item.Value.ToString()));
if (_Force)
{
LastOid = item.Key.ToString();
}
else
{
if (_RootOID.IsRootOf(item.Key))
{
LastOid = item.Key.ToString();
}
else
{
LastOid = null;
break;
}
}
WriteObject(obj);
}
}
}
else
{
Console.WriteLine("OID " + LastOid + " returned Null ");
LastOid = null;
}
}
}
}
private void ReceiveTrap(object sender, SnmpPacket snmpPacket)
{
foreach (var vb in snmpPacket.GetValues())
{
trapListenerDataGridView.Rows.Add(vb.Oid.ToString(), vb.Value.ToString(),
SnmpConstants.GetTypeName(vb.Value.Type),
DateTime.Now.ToString("G"), snmpPacket.Version);
}
}
private void OnTimedEvent(object source, ElapsedEventArgs e)
{
OctetString community = new OctetString("public");
// Define agent parameters class
AgentParameters param = new AgentParameters(community);
// Set SNMP version to 1 (or 2)
param.Version = SnmpVersion.Ver2;
// Construct the agent address object
// IpAddress class is easy to use here because
// it will try to resolve constructor parameter if it doesn't
// parse to an IP address
IpAddress agent = new IpAddress("127.0.0.1");
UdpTarget target = new UdpTarget((IPAddress)agent, 161, 2000, 1);
// Pdu class used for all requests
Pdu pdu = new Pdu(PduType.Get);
string oid = whatShouldIAdd("Adding new property to PDU list");
pdu.VbList.Add(oid);
SnmpV2Packet result = (SnmpV2Packet)target.Request(pdu, param);
// If result is null then agent didn't reply or we couldn't parse the reply.
if (result != null)
{
// ErrorStatus other then 0 is an error returned by
// the Agent - see SnmpConstants for error definitions
if (result.Pdu.ErrorStatus != 0)
{
// agent reported an error with the request
Console.WriteLine("Error in SNMP reply. Error {0} index {1}",
result.Pdu.ErrorStatus,
result.Pdu.ErrorIndex);
}
else
{
for (int i = 0; i < pdu.VbList.Count; i++)
{
resultString = String.Format("(0}) ({1}): {2}",
result.Pdu.VbList[0].Oid.ToString(),
SnmpConstants.GetTypeName(result.Pdu.VbList[0].Value.Type).ToString(),
result.Pdu.VbList[0].Value.ToString());
MessageBox.Show(resultString);
watchIterations = watchIterations + 1;
if (watchIterations > 5)
{
GeneratorsTimer.Enabled = false;
}
}
}
}
else
{
Console.WriteLine("No response received from SNMP agent.");
}
}
public override SnmpV2Packet GetRequest(Pdu pdu)
{
if (m_target == null)
{
Log.Error("SNMP m_target = null.");
return(null);
}
if (pdu == null)
{
Log.Error("SNMP请求参数pdu为空");
return(null);
}
// Log msg
string logMsg;
SnmpV2Packet result = null;
pdu.Type = PduType.Get;
try
{
result = (SnmpV2Packet)m_target.Request(pdu, m_Param);
if (null != result)
{
if (result.Pdu.ErrorStatus != 0)
{
logMsg = string.Format("Error in SNMP reply. Error {0} index {1}"
, result.Pdu.ErrorStatus, result.Pdu.ErrorIndex);
Log.Error(logMsg);
}
else
{
foreach (Vb vb in result.Pdu.VbList)
{
logMsg = string.Format("ObjectName={0}, Type={1}, Value={2}"
, vb.Oid.ToString(), SnmpConstants.GetTypeName(vb.Value.Type), vb.Value.ToString());
Log.Debug(logMsg);
}
}
}
else
{
Log.Error("No response received from SNMP agent.");
}
}
catch (Exception e)
{
Log.Error(e.Message.ToString());
throw e;
}
return(result);
}
public SnmpV1Packet GetNextRequest(string OID)
{
this.param.Version = SnmpVersion.Ver1;
this.pdu = new Pdu(PduType.GetNext);
this.pdu.VbList.Add(OID);
result = (SnmpV1Packet)target.Request(pdu, param);
OidNumber = result.Pdu.VbList[0].Oid.ToString();
type = SnmpConstants.GetTypeName(result.Pdu.VbList[0].Value.Type);
value = result.Pdu.VbList[0].Value.ToString();
ipPort = address + ":161";
return(result);
}
public SnmpV2Packet GetNextRequest(Oid oid)
{
IpAddress agent = new IpAddress(_agentsIP);
UdpTarget target = new UdpTarget((IPAddress)agent, 161, 2000, 1);
// Pdu class used for all requests
Pdu pdu = new Pdu(PduType.GetNext);
//Adding new property to PDU list
pdu.VbList.Add(oid);
// Make SNMP request
SnmpV2Packet result = (SnmpV2Packet)target.Request(pdu, _param);
// If result is null then agent didn't reply or we couldn't parse the reply.
if (result != null)
{
// ErrorStatus other then 0 is an error returned by
// the Agent - see SnmpConstants for error definitions
if (result.Pdu.ErrorStatus != 0)
{
// agent reported an error with the request
string errorMessage = String.Format("Error in SNMP reply. Error {0} index {1}",
result.Pdu.ErrorStatus.ToString(),
result.Pdu.ErrorIndex.ToString());
MessageBox.Show(errorMessage, "Error", MessageBoxButtons.OK);
return(null);
}
else
{
// Reply variables are returned in the same order as they were added
// to the VbList
//DATABASE adding
string newOid = result.Pdu.VbList[0].Oid.ToString();
string newValue = result.Pdu.VbList[0].Value.ToString();
string newType = SnmpConstants.GetTypeName(result.Pdu.VbList[0].Value.Type).ToString();
string newIp = _agentsIP;
_oid = result.Pdu.VbList[0].Oid;
AddItemToDatabase(newOid, newValue, newType, newIp);
return(result);
}
}
else
{
MessageBox.Show("No response received from SNMP agent.", "Error", MessageBoxButtons.OK);
return(null);
}
}
private string LogResult(Dictionary <Oid, AsnType> result)
{
StringBuilder sb = new StringBuilder();
foreach (KeyValuePair <Oid, AsnType> kvp in result)
{
string s = string.Format("{0}: {1} {2}", kvp.Key.ToString(),
SnmpConstants.GetTypeName(kvp.Value.Type),
kvp.Value.ToString());
sb.AppendLine(s);
}
string strResult = sb.ToString();
return(strResult);
}
public SnmpVersion ValidateSnmpVersion(int version)
{
if (SnmpConstants.IsValidVersion(version) == true && version == 1)
{
return(SnmpVersion.Ver1);
}
else if (SnmpConstants.IsValidVersion(version) == true)
{
return(SnmpVersion.Ver2);
}
else
{
throw new Exception("Versão inválida");
}
}
private void btnGet_Click(object sender, EventArgs e)
{
OctetString community = new OctetString("public");
AgentParameters param = new AgentParameters(community);
param.Version = SnmpVersion.Ver2;
IpAddress agent = new IpAddress("127.0.0.1");
UdpTarget target = new UdpTarget((IPAddress)agent, 161, 2000, 1);
// Pdu class used for all requests
Pdu pdu = new Pdu(PduType.Get);
//pdu.VbList.Add("1.3.6.1.2.1.1.1.0"); //sysDescr //OID + VALUE
//pdu.VbList.Add("1.3.6.1.2.1.1.2.0"); //sysObjectID
//pdu.VbList.Add("1.3.6.1.2.1.1.3.0"); //sysUpTime
//pdu.VbList.Add("1.3.6.1.2.1.1.4.0"); //sysContact
//pdu.VbList.Add("1.3.6.1.2.1.1.5.0"); //sysName
string oid = whatShouldIAdd("Adding new property to PDU list");
pdu.VbList.Add(oid);
// Make SNMP request
SnmpV2Packet result = (SnmpV2Packet)target.Request(pdu, param);
// If result is null then agent didn't reply or we couldn't parse the reply.
if (result != null)
{
// ErrorStatus other then 0 is an error returned by
// the Agent - see SnmpConstants for error definitions
if (result.Pdu.ErrorStatus != 0)
{
// agent reported an error with the request
Console.WriteLine("Error in SNMP reply. Error {0} index {1}",
result.Pdu.ErrorStatus,
result.Pdu.ErrorIndex);
}
else
{
// Reply variables are returned in the same order as they were added
// to the VbList
resultString = String.Format("({0}) ({1}): {2}",
result.Pdu.VbList[0].Oid.ToString(),
SnmpConstants.GetTypeName(result.Pdu.VbList[0].Value.Type).ToString(),
result.Pdu.VbList[0].Value.ToString());
MessageBox.Show(resultString);
}
}
}
private string[] readGetResult(Dictionary <Oid, AsnType> result)
{
if (result == null)
{
return(null);
}
var rsltStrings = new string[3];
foreach (KeyValuePair <Oid, AsnType> kvp in result)
{
rsltStrings[0] = kvp.Key.ToString();
rsltStrings[1] = SnmpConstants.GetTypeName(kvp.Value.Type);
rsltStrings[2] = kvp.Value.ToString();
}
return(rsltStrings);
}
/// <summary>
/// Converts the
/// </summary>
/// <param name="asnType">The <see cref="AsnType" /> to convert.</param>
/// <returns>Integer representation of the <see cref="AsnType" />.</returns>
public static int ToInt(this AsnType asnType)
{
if (asnType == null)
{
throw new ArgumentNullException(nameof(asnType), "The AsnType to convert to Integer is null");
}
int convertedValue;
if (!int.TryParse(asnType.ToString(), out convertedValue))
{
throw new HamnetSnmpException($"Cannot convert an ASN Type '{SnmpConstants.GetTypeName(asnType.Type)}' of value '{asnType.ToString()}' to an integer: Value malformatted or out of range");
}
return(convertedValue);
}
/// <summary>
/// Converts the
/// </summary>
/// <param name="asnType">The <see cref="AsnType" /> to convert.</param>
/// <param name="converted">Returs the integer representation of the <see cref="AsnType" />.</param>
/// <returns><c>true</c> if the conversion was successful. Otherwise <c>false</c>.</returns>
public static bool TryToInt(this AsnType asnType, out int converted)
{
if (asnType == null)
{
throw new ArgumentNullException(nameof(asnType), "The AsnType to convert to Integer is null");
}
converted = int.MinValue;
if (!int.TryParse(asnType.ToString(), out converted))
{
log.Warn($"Cannot convert an ASN Type '{SnmpConstants.GetTypeName(asnType.Type)}' of value '{asnType.ToString()}' to an integer: Value malformatted or out of range");
return(false);
}
return(true);
}
public IActionResult Start([FromBody] Setting setting)
{
OctetString community = new OctetString(setting.Community);
AgentParameters param = new AgentParameters(community);
param.Version = SnmpVersion.Ver2;
IpAddress agent = new IpAddress(setting.AgentAddress);
UdpTarget target = new UdpTarget((System.Net.IPAddress)agent, 161, 2000, 1);
Pdu pdu = new Pdu(PduType.Get);
pdu.VbList.Add("1.3.6.1.2.1.1.5.0"); //sysName
SnmpV2Packet result = (SnmpV2Packet)target.Request(pdu, param);
// If result is null then agent didn't reply or we couldn't parse the reply.
if (result != null)
{
// ErrorStatus other then 0 is an error returned by
// the Agent - see SnmpConstants for error definitions
if (result.Pdu.ErrorStatus != 0)
{
// agent reported an error with the request
return(Json(("Error in SNMP reply. Error {0} index {1}",
result.Pdu.ErrorStatus,
result.Pdu.ErrorIndex)));
}
else
{
return(Json(("sysName({0}) ({1}): {2}",
result.Pdu.VbList[4].Oid.ToString(),
SnmpConstants.GetTypeName(result.Pdu.VbList[4].Value.Type),
result.Pdu.VbList[4].Value.ToString())));
}
}
else
{
return(Json("No response received from SNMP agent."));
}
target.Close();
return(Json(setting));
}
private void ShowResult(Dictionary <Oid, AsnType> result, DataGridView target)
{
if (result == null)
{
ErrorMessageBox.Show("Request failed.");
}
else
{
foreach (KeyValuePair <Oid, AsnType> entry in result)
{
if (entry.Value.ToString().Equals("Null"))
{
ErrorMessageBox.Show("Request failed.");
}
else
{
target.Rows.Add(entry.Key.ToString(), entry.Value.ToString(),
SnmpConstants.GetTypeName(entry.Value.Type), DateTime.Now.ToLongTimeString());
}
}
}
}
/// <summary>
/// Gets the value.
/// </summary>
/// <param name="asnValue">The ASN value.</param>
/// <param name="targetType">Type of the value.</param>
/// <returns>.NET value compliant</returns>
private object GetValue(AsnType asnValue, Type targetType)
{
object value = asnValue;
switch (SnmpConstants.GetTypeName(asnValue.Type))
{
case "Integer32":
value = ((Integer32)value).Value;
break;
case "Gauge32":
value = ((Gauge32)value).Value;
break;
case "Counter32":
value = ((Counter32)value).Value;
break;
case "TimeTicks":
value = TimeSpan.FromMilliseconds(((TimeTicks)value).Milliseconds);
break;
case "IPAddress":
value = IPAddress.Parse(((IpAddress)value).ToString());
break;
case "OctetString":
value = asnValue.ToString();
if (targetType == typeof(DateTime))
{
value = ParseDateAndTime((string)value);
}
break;
}
return(value);
}
private void GetDisk()
{
OctetString community = new OctetString(txtConStr.Text);
AgentParameters param = new AgentParameters(community);
param.Version = SnmpVersion.Ver1;
try
{
IpAddress agent = new IpAddress(txtIPAgent.Text);
UdpTarget target = new UdpTarget((IPAddress)agent, 161, 2000, 1);
Pdu pdu = new Pdu(PduType.Get);
pdu.VbList.Add("1.3.6.1.2.1.1.1.0"); //sysDescr
pdu.VbList.Add("1.3.6.1.2.1.1.2.0"); //sysObjectID
pdu.VbList.Add("1.3.6.1.2.1.1.3.0"); //sysUpTime
pdu.VbList.Add("1.3.6.1.2.1.1.4.0"); //sysContact
pdu.VbList.Add("1.3.6.1.2.1.1.5.0"); //sysName
pdu.VbList.Add("1.3.6.1.2.1.25.1.2.0"); //hrSystemDate
pdu.VbList.Add("1.3.6.1.2.1.25.1.5.0"); //hrSystemNumUsers
pdu.VbList.Add("1.3.6.1.2.1.25.1.6.0"); //hrSystemProcesses
pdu.VbList.Add("1.3.6.1.2.1.25.2.2.0"); //hrMemorySize
//pdu.VbList.Add("1.3.6.1.2.1.1.5." + n.ToString()); //sysName
//pdu.VbList.Add("1.3.6.1.2.1.2.1." + n.ToString()); //ifNumbber
SnmpV1Packet result = (SnmpV1Packet)target.Request(pdu, param);
if (result != null)
{
if (result.Pdu.ErrorStatus != 0)
{
rtbGuiGet.Text = "Error in SNMP reply. Error " + result.Pdu.ErrorStatus + " index " + result.Pdu.ErrorIndex;
}
else
{
// Reply variables are returned in the same order as they were added
// to the VbList
////////////////////////////////////
//rtbAddInfo.Text = "hrSystemDate(" + result.Pdu.VbList[0].Oid.ToString() + ") (" + SnmpConstants.GetTypeName(result.Pdu.VbList[0].Value.Type) + "):\n\t" + result.Pdu.VbList[0].Value.ToString();
//rtbAddInfo.Text += "\n\t-------------------\n\t-------------------\n" + "hrSystemNumUsers(" + result.Pdu.VbList[1].Oid.ToString() + ") (" + SnmpConstants.GetTypeName(result.Pdu.VbList[1].Value.Type) + "): " + result.Pdu.VbList[1].Value.ToString();
//rtbAddInfo.Text += "\n\t-------------------\n" + "hrSystemProcesses(" + result.Pdu.VbList[2].Oid.ToString() + ") (" + SnmpConstants.GetTypeName(result.Pdu.VbList[2].Value.Type) + "): " + result.Pdu.VbList[2].Value.ToString();
rtbAddInfo.Text += "" + "hrMemorySize(" + result.Pdu.VbList[3].Oid.ToString() + ") (" + SnmpConstants.GetTypeName(result.Pdu.VbList[3].Value.Type) + "): " + result.Pdu.VbList[3].Value.ToString();
for (int i = 1; i < 10; i++)
{
pdu.Reset();
pdu.VbList.Add("1.3.6.1.2.1.25.2.3.1.3." + i.ToString());
try
{
result = (SnmpV1Packet)target.Request(pdu, param);
if (result.Pdu.VbList[0].Value.ToString() != "Null")
{
rtbAddInfo.Text += "\n\t" + "hrStorageDescr." + i.ToString() + "(" + result.Pdu.VbList[0].Oid.ToString() + ") (" + SnmpConstants.GetTypeName(result.Pdu.VbList[0].Value.Type) + "): " + result.Pdu.VbList[0].Value.ToString();
}
}
catch (Exception)
{ }
}
}
}
else
{
rtbAddInfo.Text = "No response received from SNMP agent.";
}
target.Close();
}
catch (Exception ex)
{
rtbGuiGet.Text = "Đã xảy ra lỗi: " + ex.Message.ToString();
}
}
private void GetOne(int n, RichTextBox rtb)
{
n++;
// SNMP community name
OctetString community = new OctetString(txtConStr.Text);
// Define agent parameters class
AgentParameters param = new AgentParameters(community);
// Set SNMP version to 1 (or 2)
param.Version = SnmpVersion.Ver1;
// Construct the agent address object
// IpAddress class is easy to use here because
// it will try to resolve constructor parameter if it doesn't
// parse to an IP address
try
{
IpAddress agent = new IpAddress(txtIPAgent.Text);
// Construct target
UdpTarget target = new UdpTarget((IPAddress)agent, 161, 2000, 1);
// Pdu class used for all requests
Pdu pdu = new Pdu(PduType.Get);
pdu.VbList.Add("1.3.6.1.2.1.2.2.1.2." + n.ToString()); //ifDescr
pdu.VbList.Add("1.3.6.1.2.1.2.2.1.3." + n.ToString()); //ifType
pdu.VbList.Add("1.3.6.1.2.1.2.2.1.5." + n.ToString()); //ifSpeed
pdu.VbList.Add("1.3.6.1.2.1.2.2.1.6." + n.ToString()); //ifPhysAddress
pdu.VbList.Add("1.3.6.1.2.1.2.2.1.7." + n.ToString()); //ifAdminStatus
pdu.VbList.Add("1.3.6.1.2.1.2.2.1.8." + n.ToString()); //ifOperStatus
// Make SNMP request
SnmpV1Packet result = (SnmpV1Packet)target.Request(pdu, param);
// If result is null then agent didn't reply or we couldn't parse the reply.
if (result != null)
{
// ErrorStatus other then 0 is an error returned by
// the Agent - see SnmpConstants for error definitions
if (result.Pdu.ErrorStatus != 0)
{
// agent reported an error with the request
rtb.Text = "Error in SNMP reply. Error " + result.Pdu.ErrorStatus + " index " + result.Pdu.ErrorIndex;
}
else
{
// Reply variables are returned in the same order as they were added to the VbList
rtb.Text = "ifDescr(" + result.Pdu.VbList[0].Oid.ToString() + ") (" + SnmpConstants.GetTypeName(result.Pdu.VbList[0].Value.Type) + "): " + "\n\t" + result.Pdu.VbList[0].Value.ToString();
rtb.Text = rtb.Text + "\n" + "ifType(" + result.Pdu.VbList[1].Oid.ToString() + ") (" + SnmpConstants.GetTypeName(result.Pdu.VbList[1].Value.Type) + "): " + "\n\t" + GetType(int.Parse(result.Pdu.VbList[1].Value.ToString()));
rtb.Text = rtb.Text + "\n" + "ifSpeed(" + result.Pdu.VbList[2].Oid.ToString() + ") (" + SnmpConstants.GetTypeName(result.Pdu.VbList[2].Value.Type) + "): " + "\n\t" + result.Pdu.VbList[2].Value.ToString();
rtb.Text = rtb.Text + "\n" + "ifPhysAddress(" + result.Pdu.VbList[3].Oid.ToString() + ") (" + SnmpConstants.GetTypeName(result.Pdu.VbList[3].Value.Type) + "): " + "\n\t" + result.Pdu.VbList[3].Value.ToString();
rtb.Text = rtb.Text + "\n" + "ifAdminStatus(" + result.Pdu.VbList[4].Oid.ToString() + ") (" + SnmpConstants.GetTypeName(result.Pdu.VbList[4].Value.Type) + "): " + "\n\t" + GetStatus(int.Parse(result.Pdu.VbList[4].Value.ToString()));
rtb.Text = rtb.Text + "\n" + "ifOperStatus(" + result.Pdu.VbList[5].Oid.ToString() + ") (" + SnmpConstants.GetTypeName(result.Pdu.VbList[5].Value.Type) + "): " + "\n\t" + GetStatus(int.Parse(result.Pdu.VbList[5].Value.ToString()));
}
}
else
{
rtb.Text = "No response received from SNMP agent.";
}
target.Close();
}
catch (Exception ex)
{
rtb.Text = "Đã xảy ra lỗi: " + ex.Message.ToString();
}
}
private void Get(int n)
{
OctetString community = new OctetString(txtConStr.Text);
AgentParameters param = new AgentParameters(community);
param.Version = SnmpVersion.Ver1;
try
{
IpAddress agent = new IpAddress(txtIPAgent.Text);
UdpTarget target = new UdpTarget((IPAddress)agent, 161, 2000, 1);
Pdu pdu = new Pdu(PduType.Get);
pdu.VbList.Add("1.3.6.1.2.1.1.1." + n.ToString()); //sysDescr
pdu.VbList.Add("1.3.6.1.2.1.1.2." + n.ToString()); //sysObjectID
pdu.VbList.Add("1.3.6.1.2.1.1.3." + n.ToString()); //sysUpTime
pdu.VbList.Add("1.3.6.1.2.1.1.4." + n.ToString()); //sysContact
pdu.VbList.Add("1.3.6.1.2.1.1.5." + n.ToString()); //sysName
pdu.VbList.Add("1.3.6.1.2.1.2.1." + n.ToString()); //ifNumbber
SnmpV1Packet result = (SnmpV1Packet)target.Request(pdu, param);
if (result != null)
{
if (result.Pdu.ErrorStatus != 0)
{
rtbGuiGet.Text = "Error in SNMP reply. Error " + result.Pdu.ErrorStatus + " index " + result.Pdu.ErrorIndex;
}
else
{
rtbGuiGet.Text = "sysDescr(" + result.Pdu.VbList[0].Oid.ToString() + ") (" + SnmpConstants.GetTypeName(result.Pdu.VbList[0].Value.Type) + "): " + result.Pdu.VbList[0].Value.ToString();
rtbGuiGet.Text = rtbGuiGet.Text + "\n" + "sysObjectID(" + result.Pdu.VbList[1].Oid.ToString() + ") (" + SnmpConstants.GetTypeName(result.Pdu.VbList[1].Value.Type) + "): " + result.Pdu.VbList[1].Value.ToString();
rtbGuiGet.Text = rtbGuiGet.Text + "\n" + "sysUpTime(" + result.Pdu.VbList[2].Oid.ToString() + ") (" + SnmpConstants.GetTypeName(result.Pdu.VbList[2].Value.Type) + "): " + result.Pdu.VbList[2].Value.ToString();
rtbGuiGet.Text = rtbGuiGet.Text + "\n" + "sysContact(" + result.Pdu.VbList[3].Oid.ToString() + ") (" + SnmpConstants.GetTypeName(result.Pdu.VbList[3].Value.Type) + "): " + result.Pdu.VbList[3].Value.ToString();
rtbGuiGet.Text = rtbGuiGet.Text + "\n" + "sysName(" + result.Pdu.VbList[4].Oid.ToString() + ") (" + SnmpConstants.GetTypeName(result.Pdu.VbList[4].Value.Type) + "): " + result.Pdu.VbList[4].Value.ToString();
rtbGuiGet.Text = rtbGuiGet.Text + "\n" + "ifNumber(" + result.Pdu.VbList[5].Oid.ToString() + ") (" + SnmpConstants.GetTypeName(result.Pdu.VbList[5].Value.Type) + "): " + result.Pdu.VbList[5].Value.ToString();
GetMore(int.Parse(result.Pdu.VbList[5].Value.ToString()));
}
}
else
{
rtbGuiGet.Text = "No response received from SNMP agent.";
}
target.Close();
}
catch (Exception ex)
{
rtbGuiGet.Text = "Đã xảy ra lỗi: " + ex.Message.ToString();
}
}
public void testWebsiteExample()
{
// SNMP community name
OctetString community = new OctetString("public");
// Define agent parameters class
AgentParameters param = new AgentParameters(community);
// Set SNMP version to 1 (or 2)
param.Version = SnmpVersion.Ver1;
// Construct the agent address object
// IpAddress class is easy to use here because
// it will try to resolve constructor parameter if it doesn't
// parse to an IP address
IpAddress agent = new IpAddress("127.0.0.1");
// Construct target
UdpTarget target = new UdpTarget((IPAddress)agent, 161, 2000, 1);
// Pdu class used for all requests
Pdu pdu = new Pdu(PduType.Get);
pdu.VbList.Add("1.3.6.1.2.1.1.1.0"); //sysDescr
pdu.VbList.Add("1.3.6.1.2.1.1.2.0"); //sysObjectID
pdu.VbList.Add("1.3.6.1.2.1.1.3.0"); //sysUpTime
pdu.VbList.Add("1.3.6.1.2.1.1.4.0"); //sysContact
pdu.VbList.Add("1.3.6.1.2.1.1.5.0"); //sysName
// Make SNMP request
SnmpPacket result = (SnmpPacket)target.Request(pdu, param);
Assert.IsNotNull(result);
// If result is null then agent didn't reply or we couldn't parse the reply.
if (result != null)
{
// ErrorStatus other then 0 is an error returned by
// the Agent - see SnmpConstants for error definitions
if (result.Pdu.ErrorStatus != 0)
{
// agent reported an error with the request
Console.WriteLine("Error in SNMP reply. Error {0} index {1}",
result.Pdu.ErrorStatus,
result.Pdu.ErrorIndex);
}
else
{
// Reply variables are returned in the same order as they were added
// to the VbList
Console.WriteLine("sysDescr({0}) ({1}): {2}",
result.Pdu.VbList[0].Oid.ToString(),
SnmpConstants.GetTypeName(result.Pdu.VbList[0].Value.Type),
result.Pdu.VbList[0].Value.ToString());
Console.WriteLine("sysObjectID({0}) ({1}): {2}",
result.Pdu.VbList[1].Oid.ToString(),
SnmpConstants.GetTypeName(result.Pdu.VbList[1].Value.Type),
result.Pdu.VbList[1].Value.ToString());
Console.WriteLine("sysUpTime({0}) ({1}): {2}",
result.Pdu.VbList[2].Oid.ToString(),
SnmpConstants.GetTypeName(result.Pdu.VbList[2].Value.Type),
result.Pdu.VbList[2].Value.ToString());
Console.WriteLine("sysContact({0}) ({1}): {2}",
result.Pdu.VbList[3].Oid.ToString(),
SnmpConstants.GetTypeName(result.Pdu.VbList[3].Value.Type),
result.Pdu.VbList[3].Value.ToString());
Console.WriteLine("sysName({0}) ({1}): {2}",
result.Pdu.VbList[4].Oid.ToString(),
SnmpConstants.GetTypeName(result.Pdu.VbList[4].Value.Type),
result.Pdu.VbList[4].Value.ToString());
}
}
else
{
Console.WriteLine("No response received from SNMP agent.");
}
target.Close();
}
/// <summary>
/// 将snmp类型的pdu转换为LmtSnmp的pdu
/// </summary>
/// <param name="snmpPackage"></param>
/// <param name="target"></param>
/// <param name="lmtPdu"></param>
/// <param name="reason"></param>
/// <param name="isAsync"></param>
private bool SnmpPdu2LmtPdu(SnmpV2Packet snmpPackage, UdpTarget target
, CDTLmtbPdu lmtPdu, int reason, bool isAsync)
{
string logMsg;
if (lmtPdu == null)
{
Log.Error("参数[lmtPdu]为空");
return(false);
}
// TODO
// stru_LmtbPduAppendInfo appendInfo;
logMsg = string.Format("snmpPackage.Pdu.Type = {0}", snmpPackage.Pdu.Type);
Log.Debug(logMsg);
logMsg = string.Format("PduType.V2Trap={0}", PduType.V2Trap);
// TODO
if (snmpPackage.Pdu.Type != PduType.V2Trap) // Trap
{
}
else
{
}
lmtPdu.Clear();
lmtPdu.set_LastErrorIndex(snmpPackage.Pdu.ErrorIndex);
lmtPdu.set_LastErrorStatus(snmpPackage.Pdu.ErrorStatus);
lmtPdu.SetRequestId(snmpPackage.Pdu.RequestId);
// ip and port
IPAddress srcIpAddr = target.Address;
int port = target.Port;
lmtPdu.set_SourceIp(srcIpAddr.ToString());
lmtPdu.set_SourcePort(port);
lmtPdu.set_Reason(reason);
//lmtPdu.SetPduType(snmpPackage.Pdu.Type);
// TODO
/*
* LMTORINFO* pLmtorInfo = CDTAppStatusInfo::GetInstance()->GetLmtorInfo(csIpAddr);
* if (pLmtorInfo != NULL && pLmtorInfo->m_isSimpleConnect && pdu.get_type() == sNMP_PDU_TRAP)
* {
* Oid id;
* pdu.get_notify_id(id);
* CString strTrapOid = id.get_printable();
* if (strTrapOid != "1.3.6.1.4.1.5105.100.1.2.2.3.1.1")
* {
* //如果是简单连接网元的非文件传输结果事件，就不要往上层抛送了
* return FALSE;
* }
* }
*/
//如果是错误的响应，则直接返回
if (lmtPdu.get_LastErrorStatus() != 0 || reason == -5)
{
return(true);
}
// 转换vb
// 对于Trap消息,我们自己额外构造两个Vb，用来装载时间戳和trap Id
if (snmpPackage.Pdu.Type == PduType.V2Trap) // Trap
{
// TODO:
}
foreach (Vb vb in snmpPackage.Pdu.VbList)
{
logMsg = string.Format("ObjectName={0}, Type={1}, Value={2}"
, vb.Oid.ToString(), SnmpConstants.GetTypeName(vb.Value.Type), vb.Value.ToString());
Log.Debug(logMsg);
CDTLmtbVb lmtVb = new CDTLmtbVb();
lmtVb.set_Oid(vb.Oid.ToString());
// SnmpConstants.GetSyntaxObject(AsnType.OCTETSTRING);
// SnmpConstants.GetTypeName(vb.Value.Type);
// TODO
// lmtVb.set_Syntax(vb.Value.GetType());
// TODO:不确定对不对？？？？？？？
if (AsnType.OCTETSTRING == vb.Value.Type)
{
/*对于像inetipAddress和DateandTime需要做一下特殊处理，把内存值转换为显示文本*/
// CString strNodeType = GetNodeTypeByOIDInCache(csIpAddr, strOID, strMIBPrefix);
string strNodeType = "";
if ("DateandTime".Equals(strNodeType))
{
}
else if ("inetaddress".Equals(strNodeType))
{
}
else if ("MacAddress".Equals(strNodeType))
{
}
else if ("Unsigned32Array".Equals(strNodeType))
{
}
else if ("Integer32Array".Equals(strNodeType) || "".Equals(strNodeType))
{
}
else if ("MncMccType".Equals(strNodeType))
{
}
}
string value = vb.Value.ToString();
lmtVb.set_Value(value);
lmtPdu.AddVb(lmtVb);
} // end foreach
//如果得到的LmtbPdu对象里的vb个数为0，说明是是getbulk响应，并且没有任何实例
//为方便后面统一处理，将错误码设为资源不可得
if (lmtPdu.VbCount() == 0)
{
// TODO: SNMP_ERROR_RESOURCE_UNAVAIL
lmtPdu.set_LastErrorStatus(13);
lmtPdu.set_LastErrorIndex(1);
}
return(true);
}
public JObject Walk()
{
JObject output = new JObject();
JArray array = new JArray();
OctetString community = new OctetString("public");
AgentParameters param = new AgentParameters(community);
param.Version = SnmpVersion.Ver2;
Oid lastOid = (Oid)this.oid.Clone();
Pdu pdu = new Pdu(PduType.GetBulk);
pdu.NonRepeaters = 0;
while (lastOid != null)
{
if (pdu.RequestId != 0)
{
pdu.RequestId += 1;
}
pdu.VbList.Clear();
pdu.VbList.Add(lastOid);
SnmpV2Packet result = (SnmpV2Packet)target.Request(pdu, param);
if (result != null)
{
if (result.Pdu.ErrorStatus != 0)
{
lastOid = null;
throw new SnmpErrorStatusException("Error in SNMP reply. Error " + result.Pdu.ErrorStatus + " index " + result.Pdu.ErrorIndex, result.Pdu.ErrorStatus, result.Pdu.ErrorIndex);
}
else
{
foreach (Vb v in result.Pdu.VbList)
{
if (this.oid.IsRootOf(v.Oid))
{
JObject value = new JObject();
value.Add("OID", v.Oid.ToString());
value.Add("Type", SnmpConstants.GetTypeName(v.Value.Type));
value.Add("Value", v.Value.ToString());
array.Add(value);
if (v.Value.Type == SnmpConstants.SMI_ENDOFMIBVIEW)
{
lastOid = null;
}
else
{
lastOid = v.Oid;
}
}
else
{
lastOid = null;
break;
}
}
}
}
else
{
throw new SnmpNetworkException("No response received from SNMP agent.");
}
}
output.Add("Results", array);
return(output);
}
public void Start()
{
Task.Run(() =>
{
this._run = true;
while (this._run)
{
byte[] indata = new byte[16 * 1024];
// 16KB receive buffer int inlen = 0;
IPEndPoint peer = new IPEndPoint(IPAddress.Any, 0);
EndPoint inep = (EndPoint)peer;
int inlen = -1;
try
{
inlen = _socket.ReceiveFrom(indata, ref inep);
}
catch (Exception ex)
{
Console.WriteLine("Exception {0}", ex.Message);
inlen = -1;
}
if (inlen > 0)
{
Task.Run(() =>
{
// Check protocol version int
int ver = SnmpPacket.GetProtocolVersion(indata, inlen);
// Parse SNMP Version 2 TRAP packet
SnmpV2Packet pkt = new SnmpV2Packet();
pkt.decode(indata, inlen);
Console.WriteLine("** SNMP Version 2 TRAP received from {0}:", inep.ToString());
//TrapOID .1.3.6.1.4.1.368.4.1.3.1.3.1.1(TemperatureSensorStatus)
//Variable bindings
//1.3.6.1.4.1.368.4.1.3.1.3.1.1(TemperatureSensorStatus)->value = 0(NONE), 1(OK), 2(NOK)
//1.3.6.1.4.1.368.4.1.3.1.4.1.1(TemperatureSensorValue)->value = [-60, 100]
//---------------------- -
//TrapOID 1.3.6.1.4.1.368.4.2.0.1(AlarmStatus)
//Variable bindings
//1.3.6.1.4.1.368.4.2.0.1(AlarmStatus)->value = 0, 1, 2, 3
if ((SnmpSharpNet.PduType)pkt.Pdu.Type != PduType.V2Trap)
{
Console.WriteLine("*** NOT an SNMPv2 trap ****");
}
else
{
var valueReceived = pkt.Pdu.VbList.FirstOrDefault(p => p.Oid.ToString().CompareTo(pkt.Pdu.TrapObjectID.ToString()) == 0);
RaiseEvent(valueReceived.Oid.ToString().CompareTo(OIDAlarm) == 0 ? "Alarm" : "OperationalStatus", valueReceived.Value.ToString());
Console.WriteLine("*** VarBind content:");
foreach (Vb v in pkt.Pdu.VbList)
{
Console.WriteLine("**** {0} {1}: {2}",
v.Oid.ToString(), SnmpConstants.GetTypeName(v.Value.Type), v.Value.ToString());
}
Console.WriteLine("** End of SNMP Version 2 TRAP data.");
}
});
}
else
{
if (inlen == 0)
{
Console.WriteLine("Zero length packet received.");
}
}
}
});
}
//GETを取得する
public void getRequest(Class_InputData input)
{
try{
// コミュニティ名
OctetString comm = new OctetString(input.community);
// パラメータクラス
AgentParameters param = new AgentParameters(comm);
// バージョン取得
param.Version = input.versionofSNMPsharp;
IpAddress agent = new IpAddress(input.hostname);
// Construct target
UdpTarget target = new UdpTarget((IPAddress)agent, 161, 2000, 1);
// Pdu class used for all requests
Pdu pdu = new Pdu(PduType.Get);
pdu.VbList.Add(input.oid);
//バージョン1の時
if (input.version == "v1" | input.version == "1")
{
SnmpV1Packet result = (SnmpV1Packet)target.Request(pdu, param);
// If result is null then agent didn't reply or we couldn't parse the reply.
if (result != null)
{
// ErrorStatus other then 0 is an error returned by
// the Agent - see SnmpConstants for error definitions
if (result.Pdu.ErrorStatus != 0)
{
// agent reported an error with the request
Console.WriteLine("Error in SNMP reply. Error {0} index {1}",
result.Pdu.ErrorStatus,
result.Pdu.ErrorIndex);
}
else
{
resultList = new Dictionary <string, string>();
resultList["oid"] = result.Pdu.VbList[0].Oid.ToString();
resultList["type"] = SnmpConstants.GetTypeName(result.Pdu.VbList[0].Value.Type);
//日本語の可能性あり
//ifdescの時日本語の可能性あり
//1.3.6.1.2.1.2.2.1.2 ifdesc
//1.3.6.1.2.1.25.3.2.1.3. hrDeviceDescr
if (0 <= result.Pdu.VbList[0].Oid.ToString().IndexOf("1.3.6.1.2.1.2.2.1.2") | 0 <= result.Pdu.VbList[0].Oid.ToString().IndexOf("1.3.6.1.2.1.25.3.2.1.3"))
{
resultList["value"] = convertJP(result.Pdu.VbList[0].Value.ToString());
}
else if (0 <= result.Pdu.VbList[0].Oid.ToString().IndexOf("1.3.6.1.2.1.2.2.1.7.") | 0 <= result.Pdu.VbList[0].Oid.ToString().IndexOf("1.3.6.1.2.1.2.2.1.8."))
{
resultList["value"] = Util.convIfStatus(result.Pdu.VbList[0].Oid.ToString());
}
else
{
string value = result.Pdu.VbList[0].Value.ToString();
//TimeTick型の時はミリ秒も出力する
if (resultList["type"] == SnmpConstants.SMI_TIMETICKS_STR)
{
TimeTicks timeti = (TimeTicks)result.Pdu.VbList[0].Value;
value = "(" + timeti.Milliseconds.ToString() + "ms)" + result.Pdu.VbList[0].Value.ToString();
}
resultList["value"] = value;
}
}
}
else
{
Console.WriteLine("SNMP agentからのレスポンスがありません.");
}
}
// v2以降の時
else
{
SnmpV2Packet result = (SnmpV2Packet)target.Request(pdu, param);
// If result is null then agent didn't reply or we couldn't parse the reply.
if (result != null)
{
// ErrorStatus other then 0 is an error returned by
// the Agent - see SnmpConstants for error definitions
if (result.Pdu.ErrorStatus != 0)
{
// agent reported an error with the request
Console.WriteLine("Error in SNMP reply. Error {0} index {1}",
result.Pdu.ErrorStatus,
result.Pdu.ErrorIndex);
}
else
{
resultList = new Dictionary <string, string>();
resultList["oid"] = result.Pdu.VbList[0].Oid.ToString();
resultList["type"] = SnmpConstants.GetTypeName(result.Pdu.VbList[0].Value.Type);
//日本語の可能性あり
//ifdescの時日本語の可能性あり
if (0 <= result.Pdu.VbList[0].Oid.ToString().IndexOf("1.3.6.1.2.1.2.2.1.2") | 0 <= result.Pdu.VbList[0].Oid.ToString().IndexOf("1.3.6.1.2.1.25.3.2.1.3"))
{
resultList["value"] = convertJP(result.Pdu.VbList[0].Value.ToString());
}
else if (0 <= result.Pdu.VbList[0].Oid.ToString().IndexOf("1.3.6.1.2.1.2.2.1.7.") | 0 <= result.Pdu.VbList[0].Oid.ToString().IndexOf("1.3.6.1.2.1.2.2.1.8."))
{
resultList["value"] = Util.convIfStatus(result.Pdu.VbList[0].Oid.ToString());
}
else
{
string value = result.Pdu.VbList[0].Value.ToString();
//TimeTick型の時はミリ秒も出力する
if (resultList["type"] == SnmpConstants.SMI_TIMETICKS_STR)
{
TimeTicks timeti = (TimeTicks)result.Pdu.VbList[0].Value;
value = "(" + timeti.Milliseconds.ToString() + "ms)" + result.Pdu.VbList[0].Value.ToString();
}
resultList["value"] = value;
}
}
}
else
{
Console.WriteLine("SNMP agentからのレスポンスがありません.");
}
}
target.Close();
}
catch (Exception)
{
throw;
}
}
public SNMPResultSet[] Walk(string pOID)
{
List <SNMPResultSet> snmpResults = new List <SNMPResultSet>();
// Define agent parameters class
AgentParameters param = new AgentParameters(new OctetString(CommunityName));
// Set SNMP version to 2 (GET-BULK only works with SNMP ver 2 and 3)
param.Version = SnmpVersion.Ver2;
// Construct target
UdpTarget target = new UdpTarget((IPAddress)AgentIP, 161, 2000, 1);
// Define Oid that is the root of the MIB
// tree you wish to retrieve
Oid rootOid = new Oid(pOID); // ifDescr
// This Oid represents last Oid returned by
// the SNMP agent
Oid lastOid = (Oid)rootOid.Clone();
// Pdu class used for all requests
Pdu pdu = new Pdu(PduType.GetBulk);
// In this example, set NonRepeaters value to 0
pdu.NonRepeaters = 0;
// MaxRepetitions tells the agent how many Oid/Value pairs to return
// in the response.
pdu.MaxRepetitions = 5;
// Loop through results
while (lastOid != null)
{
// When Pdu class is first constructed, RequestId is set to 0
// and during encoding id will be set to the random value
// for subsequent requests, id will be set to a value that
// needs to be incremented to have unique request ids for each
// packet
if (pdu.RequestId != 0)
{
pdu.RequestId += 1;
}
// Clear Oids from the Pdu class.
pdu.VbList.Clear();
// Initialize request PDU with the last retrieved Oid
pdu.VbList.Add(lastOid);
// Make SNMP request
SnmpV2Packet result = (SnmpV2Packet)target.Request(pdu, param);
// You should catch exceptions in the Request if using in real application.
// If result is null then agent didn't reply or we couldn't parse the reply.
if (result != null)
{
// ErrorStatus other then 0 is an error returned by
// the Agent - see SnmpConstants for error definitions
if (result.Pdu.ErrorStatus != 0)
{
// agent reported an error with the request
Console.WriteLine("Error in SNMP reply. Error {0} index {1}",
result.Pdu.ErrorStatus,
result.Pdu.ErrorIndex);
lastOid = null;
break;
}
else
{
// Walk through returned variable bindings
foreach (Vb v in result.Pdu.VbList)
{
// Check that retrieved Oid is "child" of the root OID
if (rootOid.IsRootOf(v.Oid))
{
snmpResults.Add(new SNMPResultSet(v.Oid.ToString(), SnmpConstants.GetTypeName(v.Value.Type), v.Value.ToString()));
if (v.Value.Type == SnmpConstants.SMI_ENDOFMIBVIEW)
{
lastOid = null;
}
else
{
lastOid = v.Oid;
}
}
else
{
// we have reached the end of the requested
// MIB tree. Set lastOid to null and exit loop
lastOid = null;
}
}
}
}
else
{
Console.WriteLine("No response received from SNMP agent.");
}
}
target.Close();
return(snmpResults.ToArray());
}
public SNMPResultSet Get(string pOID)
{
SNMPResultSet snmpResult = null;
// Define agent parameters class
AgentParameters param = new AgentParameters(new OctetString(CommunityName));
// Set SNMP version to 1 (or 2)
param.Version = SnmpVersion.Ver1;
// Construct target
UdpTarget target = new UdpTarget((IPAddress)AgentIP, 161, 2000, 1);
// Pdu class used for all requests
Pdu pdu = new Pdu(PduType.Get);
pdu.VbList.Add(pOID);
// Make SNMP request
SnmpV1Packet result = (SnmpV1Packet)target.Request(pdu, param);
// If result is null then agent didn't reply or we couldn't parse the reply.
if (result != null)
{
// ErrorStatus other then 0 is an error returned by
// the Agent - see SnmpConstants for error definitions
if (result.Pdu.ErrorStatus != 0)
{
// agent reported an error with the request
Console.WriteLine("Error in SNMP reply. Error {0} index {1}",
result.Pdu.ErrorStatus,
result.Pdu.ErrorIndex);
}
else
{
// Reply variables are returned in the same order as they were added
// to the VbList
snmpResult = new SNMPResultSet(result.Pdu.VbList[0].Oid.ToString(), SnmpConstants.GetTypeName(result.Pdu.VbList[0].Value.Type), result.Pdu.VbList[0].Value.ToString());
}
}
else
{
Console.WriteLine("No response received from SNMP agent.");
}
target.Close();
return(snmpResult);
}
private void AcceptTrap()
{
if (!isListenTrap)
{
return;
}
socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
IPEndPoint ipep = new IPEndPoint(IPAddress.Any, App.snmpTrapPort);
EndPoint ep = (EndPoint)ipep;
try
{
socket.Bind(ep);
}
catch (Exception ex)
{
IsListenTrap = false;
MessageBox.Show(string.Format("打开TRAP监听端口{0}失败\n详细信息:{1}", App.snmpTrapPort, ex.Message));
return;
}
SetTextBlockAsync(tbStatusMessage, string.Format("开始后台接收Trap消息，udp端口{0}", App.snmpTrapPort));
// Disable timeout processing. Just block until packet is received
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, 0);
IPEndPoint peer = new IPEndPoint(IPAddress.Any, 0);
EndPoint inep = (EndPoint)peer;
while (isListenTrap)
{
// 16KB receive buffer
byte[] indata = new byte[16 * 1024];
int inlen = 0;
try
{
inlen = socket.ReceiveFrom(indata, ref inep);//inlen为udp包的负载
}
catch (Exception ex)
{
string errorMessage;
if (isListenTrap)
{
errorMessage = string.Format("异常 {0}", ex.Message);
SetTextBlockAsync(tbStatusMessage, errorMessage);
}
else
{
errorMessage = "后台接收Trap线程被强行终止";
SetTextBlockAsync(tbStatusMessage, errorMessage);
return;
}
inlen = -1;
}
if (inlen > 0)
{
// Check protocol version
int ver = SnmpPacket.GetProtocolVersion(indata, inlen);
//在snmphelper中建立静态函数分别解析V1 V2的trap。。。
if (ver == (int)SnmpVersion.Ver1)
{
// Parse SNMP Version 1 TRAP packet
SnmpV1TrapPacket pkt = new SnmpV1TrapPacket();
pkt.decode(indata, inlen);
Console.WriteLine("** SNMP Version 1 TRAP received from {0}:", inep.ToString());
Console.WriteLine("*** Trap generic: {0}", pkt.Pdu.Generic);
Console.WriteLine("*** Trap specific: {0}", pkt.Pdu.Specific);
Console.WriteLine("*** Agent address: {0}", pkt.Pdu.AgentAddress.ToString());
Console.WriteLine("*** Timestamp: {0}", pkt.Pdu.TimeStamp.ToString());
Console.WriteLine("*** VarBind count: {0}", pkt.Pdu.VbList.Count);
Console.WriteLine("*** VarBind content:");
foreach (Vb v in pkt.Pdu.VbList)
{
Console.WriteLine("**** {0} {1}: {2}", v.Oid.ToString(), SnmpConstants.GetTypeName(v.Value.Type), v.Value.ToString());
}
Console.WriteLine("** End of SNMP Version 1 TRAP data.");
}
else
{
// Parse SNMP Version 2 TRAP packet
SnmpV2Packet pkt = new SnmpV2Packet();
pkt.decode(indata, inlen);
Console.WriteLine("** SNMP Version 2 TRAP received from {0}:", inep.ToString());
if (pkt.Pdu.Type != PduType.V2Trap)
{
Console.WriteLine("*** NOT an SNMPv2 trap ****");
}
else
{
Console.WriteLine("*** Community: {0}", pkt.Community.ToString());
Console.WriteLine("*** VarBind count: {0}", pkt.Pdu.VbList.Count);
Console.WriteLine("*** VarBind content:");
foreach (Vb v in pkt.Pdu.VbList)
{
Console.WriteLine("**** {0} {1}: {2}",
v.Oid.ToString(), SnmpConstants.GetTypeName(v.Value.Type), v.Value.ToString());
}
Console.WriteLine("** End of SNMP Version 2 TRAP data.");
}
}
}
else
{
if (inlen == 0)
{
Console.WriteLine("Zero length packet received.");
}
}
}
SetTextBlockAsync(tbStatusMessage, "后台接收Trap线程结束");
}
