public string SNMP_SET(string adres, string value)
{
// Prepare target
UdpTarget target = new UdpTarget((IPAddress)new IpAddress("127.0.0.1"));
// Create a SET PDU
Pdu pdu = new Pdu(PduType.Set);
// Set a value to integer
pdu.VbList.Add(new Oid(adres), new SnmpSharpNet.Integer32(int.Parse(value)));
// Set Agent security parameters
AgentParameters aparam = new AgentParameters(SnmpVersion.Ver2, new SnmpSharpNet.OctetString("public"));
// Response packet
SnmpV2Packet response;
try
{
// Send request and wait for response
response = target.Request(pdu, aparam) as SnmpV2Packet;
}
catch (Exception ex)
{
// If exception happens, it will be returned here
target.Close();
return String.Format("Request failed with exception: {0}", ex.Message);
}
// Make sure we received a response
if (response == null)
{
return ("Error in sending SNMP request.");
}
else
{
// Check if we received an SNMP error from the agent
if (response.Pdu.ErrorStatus != 0)
{
return (String.Format("SNMP agent returned ErrorStatus {0} on index {1}",
response.Pdu.ErrorStatus, response.Pdu.ErrorIndex));
}
else
{
// Everything is ok. Agent will return the new value for the OID we changed
return (String.Format("Agent response {0}: {1}",
response.Pdu[0].Oid.ToString(), response.Pdu[0].Value.ToString()));
}
}
}
/// <summary>
/// SNMP GET request
/// </summary>
/// <example>SNMP GET request:
/// <code>
/// String snmpAgent = "10.10.10.1";
/// String snmpCommunity = "public";
/// SimpleSnmp snmp = new SimpleSnmp(snmpAgent, snmpCommunity);
/// // Create a request Pdu
/// Pdu pdu = new Pdu();
/// pdu.Type = SnmpConstants.GET; // type GET
/// pdu.VbList.Add("1.3.6.1.2.1.1.1.0");
/// Dictionary<Oid, AsnType> result = snmp.GetNext(SnmpVersion.Ver1, pdu);
/// if( result == null ) {
/// Console.WriteLine("Request failed.");
/// } else {
/// foreach (KeyValuePair<Oid, AsnType> entry in result)
/// {
/// Console.WriteLine("{0} = {1}: {2}", entry.Key.ToString(), SnmpConstants.GetTypeName(entry.Value.Type),
/// entry.Value.ToString());
/// }
/// }
/// </code>
/// Will return:
/// <code>
/// 1.3.6.1.2.1.1.1.0 = OctetString: "Dual core Intel notebook"
/// </code>
/// </example>
/// <param name="version">SNMP protocol version. Acceptable values are SnmpVersion.Ver1 and SnmpVersion.Ver2</param>
/// <param name="pdu">Request Protocol Data Unit</param>
/// <returns>Result of the SNMP request in a dictionary format with Oid => AsnType values</returns>
public Dictionary <Oid, AsnType> Get(SnmpVersion version, Pdu pdu)
{
if (!Valid)
{
return(null); // class is not fully initialized.
}
// function only works on SNMP version 1 and SNMP version 2 requests
if (version != SnmpVersion.Ver1 && version != SnmpVersion.Ver2)
{
return(null);
}
try
{
_target = new UdpTarget(_peerIP, _peerPort, _timeout, _retry);
AgentParameters param = new AgentParameters(version, new OctetString(_community));
SnmpPacket result = _target.Request(pdu, param);
if (result != null)
{
if (result.Pdu.ErrorStatus == 0)
{
Dictionary <Oid, AsnType> res = new Dictionary <Oid, AsnType>();
foreach (Vb v in result.Pdu.VbList)
{
if (version == SnmpVersion.Ver2 && (v.Value.Type == SnmpConstants.SMI_NOSUCHINSTANCE ||
v.Value.Type == SnmpConstants.SMI_NOSUCHOBJECT))
{
res.Add(v.Oid, new Null());
}
else
{
res.Add(v.Oid, v.Value);
}
}
_target.Close();
_target = null;
return(res);
}
}
}
catch
{
}
_target.Close();
_target = null;
return(null);
}
public static bool Set(IPAddress agent, string community, string oid, int value, Func <Oid, string, bool> handleValue)
{
// Prepare target
UdpTarget target = new UdpTarget(agent);
// Create a SET PDU
Pdu pdu = new Pdu(PduType.Set);
var oidValue = new Oid(oid);
// Set a value to integer
pdu.VbList.Add(oidValue, new Integer32(value));
// Set Agent security parameters
AgentParameters aparam = new AgentParameters(SnmpVersion.Ver2, new OctetString(community));
// Response packet
SnmpV2Packet response;
try
{
// Send request and wait for response
response = target.Request(pdu, aparam) as SnmpV2Packet;
}
catch (Exception)
{
// If exception happens, it will be returned here
//System.Diagnostics.Debug.WriteLine(String.Format("Request failed with exception: {0}", ex.Message));
target.Close();
return(false);
}
// Make sure we received a response
if (response == null)
{
//System.Diagnostics.Debug.WriteLine("Error in sending SNMP request.");
}
else
{
// Check if we received an SNMP error from the agent
if (response.Pdu.ErrorStatus != 0)
{
//System.Diagnostics.Debug.WriteLine(String.Format("SNMP agent returned ErrorStatus {0} on index {1}",
// response.Pdu.ErrorStatus, response.Pdu.ErrorIndex));
}
else
{
// Everything is ok. Agent will return the new value for the OID we changed
//System.Diagnostics.Debug.WriteLine(String.Format("Agent response {0}: {1}",
// response.Pdu[0].Oid.ToString(), response.Pdu[0].Value.ToString()));
handleValue(oidValue, response.Pdu[0].Value.ToString());
}
}
return(true);
}
/// <summary>
/// SNMP GET-BULK request
/// </summary>
/// <remarks>
/// GetBulk request type is only available with SNMP v2c agents. SNMP v3 also supports the request itself
/// but that version of the protocol is not supported by SimpleSnmp.
///
/// GetBulk method will return a dictionary of Oid to value mapped values as returned form a
/// single GetBulk request to the agent. You can change how the request itself is made by changing the
/// SimpleSnmp.NonRepeaters and SimpleSnmp.MaxRepetitions values. SimpleSnmp properties are only used
/// when values in the parameter Pdu are set to 0.
/// </remarks>
/// <example>SNMP GET-BULK request:
/// <code>
/// String snmpAgent = "10.10.10.1";
/// String snmpCommunity = "private";
/// SimpleSnmp snmp = new SimpleSnmp(snmpAgent, snmpCommunity);
/// // Create a request Pdu
/// Pdu pdu = new Pdu();
/// pdu.Type = SnmpConstants.GETBULK; // type GETBULK
/// pdu.VbList.Add("1.3.6.1.2.1.1");
/// pdu.NonRepeaters = 0;
/// pdu.MaxRepetitions = 10;
/// Dictionary<Oid, AsnType> result = snmp.GetBulk(pdu);
/// if( result == null ) {
/// Console.WriteLine("Request failed.");
/// } else {
/// foreach (KeyValuePair<Oid, AsnType> entry in result)
/// {
/// Console.WriteLine("{0} = {1}: {2}", entry.Key.ToString(), SnmpConstants.GetTypeName(entry.Value.Type),
/// entry.Value.ToString());
/// }
/// }
/// </code>
/// Will return:
/// <code>
/// 1.3.6.1.2.1.1.1.0 = OctetString: "Dual core Intel notebook"
/// 1.3.6.1.2.1.1.2.0 = ObjectId: 1.3.6.1.9.233233.1.1
/// 1.3.6.1.2.1.1.3.0 = TimeTicks: 0d 0h 0m 1s 420ms
/// 1.3.6.1.2.1.1.4.0 = OctetString: "*****@*****.**"
/// 1.3.6.1.2.1.1.5.0 = OctetString: "milans-nbook"
/// 1.3.6.1.2.1.1.6.0 = OctetString: "Developer home"
/// 1.3.6.1.2.1.1.8.0 = TimeTicks: 0d 0h 0m 0s 10ms
/// </code>
/// </example>
/// <param name="pdu">Request Protocol Data Unit</param>
/// <returns>Result of the SNMP request in a dictionary format with Oid => AsnType values</returns>
public Dictionary <Oid, AsnType> GetBulk(Pdu pdu)
{
if (!Valid)
{
return(null); // class is not fully initialized.
}
try
{
if (pdu.NonRepeaters == 0)
{
pdu.NonRepeaters = _nonRepeaters;
}
if (pdu.MaxRepetitions == 0)
{
pdu.MaxRepetitions = _maxRepetitions;
}
_target = new UdpTarget(_peerIP, _peerPort, _timeout, _retry);
AgentParameters param = new AgentParameters(SnmpVersion.Ver2, new OctetString(_community));
SnmpPacket result = _target.Request(pdu, param);
if (result != null)
{
if (result.Pdu.ErrorStatus == 0)
{
Dictionary <Oid, AsnType> res = new Dictionary <Oid, AsnType>();
foreach (Vb v in result.Pdu.VbList)
{
if (
(v.Value.Type == SnmpConstants.SMI_ENDOFMIBVIEW) ||
(v.Value.Type == SnmpConstants.SMI_NOSUCHINSTANCE) ||
(v.Value.Type == SnmpConstants.SMI_NOSUCHOBJECT))
{
break;
}
res.Add(v.Oid, v.Value);
}
_target.Close();
_target = null;
return(res);
}
}
}
catch
{
}
_target.Close();
_target = null;
return(null);
}
public static AsnType Get(IPAddress agent, string community, string oid)
{
// Define agent parameters class
AgentParameters agentParameters = new AgentParameters(SnmpVersion.Ver2, new OctetString(community));
// Construct target
UdpTarget target = new UdpTarget(agent, 161, 2000, 1);
// Pdu class used for all requests
Pdu pdu = new Pdu(PduType.Get);
pdu.VbList.Add(oid); //sysDescr
// Make SNMP request
var snmpResponse = target.Request(pdu, agentParameters) as SnmpV2Packet;
AsnType result = null;
// If result is null then agent didn't reply or we couldn't parse the reply.
if (snmpResponse != null)
{
// ErrorStatus other then 0 is an error returned by
// the Agent - see SnmpConstants for error definitions
if (snmpResponse.Pdu.ErrorStatus != 0)
{
// agent reported an error with the request
throw new Exception($"Error in SNMP reply. Error {snmpResponse.Pdu.ErrorStatus} index {snmpResponse.Pdu.ErrorIndex}");
}
else
{
result = snmpResponse.Pdu.VbList[0].Value;
}
}
target.Close();
return(result);
}
private static async Task <bool> WalkGetBulkAsync(IPAddress agent, string community, string oid, Func <Vb, bool> handleValue)
{
OctetString communityString = new OctetString(community);
// Define agent parameters class
AgentParameters param = new AgentParameters(communityString);
// 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(agent, 161, 2000, 1);
// Define Oid that is the root of the MIB
// tree you wish to retrieve
Oid rootOid = new Oid(oid); // 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
NonRepeaters = 0,
// MaxRepetitions tells the agent how many Oid/Value pairs to return
// in the response.
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
//var result = (SnmpV1Packet)target.Request(pdu, param);
SnmpV2Packet result = (SnmpV2Packet)(await target.RequestAsync(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
//System.Diagnostics.Debug.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))
{
//System.Diagnostics.Debug.WriteLine("{0} ({1}): {2}",
// v.Oid.ToString(),
// SnmpConstants.GetTypeName(v.Value.Type),
// v.Value.ToString());
handleValue(v);
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
{
//System.Diagnostics.Debug.WriteLine("No response received from SNMP agent.");
}
}
target.Close();
return(true);
}
public void pobierzTabeleDoUsuniecia()
{
/*!
*Pobiera tabele SNMP.
*/
Dictionary<String, Dictionary<uint, AsnType>> tabela_rezultat = new Dictionary<string, Dictionary<uint, AsnType>>();
List<uint> tabeleKolumy = new List<uint>();
AgentParameters param = new AgentParameters(SnmpVersion.Ver2, new OctetString(community));
IpAddress peer = new IpAddress(host);
if (!peer.Valid)
{
Console.WriteLine("Zły adres.");
return;
}
UdpTarget target = new UdpTarget((IPAddress)peer);
Oid startOid = new Oid("1.3.6.1.2.1.6.13");
startOid.Add(1);
//przygotowanie zapytania
Pdu bulkPdu = Pdu.GetBulkPdu();
bulkPdu.VbList.Add(startOid);
bulkPdu.NonRepeaters = 0;
bulkPdu.MaxRepetitions = 100;
Oid curOid = (Oid)startOid.Clone();
while (startOid.IsRootOf(curOid))
{
SnmpPacket res = null;
try
{
res = target.Request(bulkPdu, param);
}
catch (Exception ex)
{
Console.WriteLine("Zapytanie nieudane {0}", ex.Message);
target.Close();
return;
}
if (res.Version != SnmpVersion.Ver2)
{
Console.WriteLine("Received wrong SNMP version response packet.");
target.Close();
return;
}
if (res.Pdu.ErrorStatus != 0)
{
Console.WriteLine("SNMP agent zwrócił błąd {0} dla zapytania {1}", res.Pdu.ErrorStatus, res.Pdu.ErrorIndex);
target.Close();
return;
}
foreach (Vb v in res.Pdu.VbList)
{
curOid = (Oid)v.Oid.Clone();
if (startOid.IsRootOf(v.Oid))
{
uint[] childOids = Oid.GetChildIdentifiers(startOid, v.Oid);
uint[] instance = new uint[childOids.Length - 1];
Array.Copy(childOids, 1, instance, 0, childOids.Length - 1);
String strInst = InstanceToString(instance);
uint column = childOids[0];
if (!tabeleKolumy.Contains(column))
tabeleKolumy.Add(column);
if (tabela_rezultat.ContainsKey(strInst))
{
tabela_rezultat[strInst][column] = (AsnType)v.Value.Clone();
}
else
{
tabela_rezultat[strInst] = new Dictionary<uint, AsnType>();
tabela_rezultat[strInst][column] = (AsnType)v.Value.Clone();
}
}
else
{
break; //bo koniec tabeli ;)
}
}
if (startOid.IsRootOf(curOid))
{
bulkPdu.VbList.Clear();
bulkPdu.VbList.Add(curOid);
bulkPdu.NonRepeaters = 0;
bulkPdu.MaxRepetitions = 100;
}
target.Close();
if (tabela_rezultat.Count <= 0)
{
Console.WriteLine("Żadnych rezlutatów nie zwrócono");
}
else
{
Console.WriteLine("Instance");
foreach (uint column in tabeleKolumy)
{
Console.Write("\tColumn id {0}", column);
}
Console.WriteLine("");
foreach (KeyValuePair<string, Dictionary<uint, AsnType>> kvp in tabela_rezultat)
{
Console.Write("{0}", kvp.Key);
foreach (uint column in tabeleKolumy)
{
if (kvp.Value.ContainsKey(column))
{
Console.Write("\t{0} ({1})", kvp.Value[column].ToString(), SnmpConstants.GetTypeName(kvp.Value[column].Type));
}
else
{
Console.Write("\t-");
}
}
Console.WriteLine("");
}
}
}
}
/// <summary>
/// SNMP GET-BULK request
/// </summary>
/// <remarks>
/// GetBulk request type is only available with SNMP v2c agents. SNMP v3 also supports the request itself
/// but that version of the protocol is not supported by SimpleSnmp.
///
/// GetBulk method will return a dictionary of Oid to value mapped values as returned form a
/// single GetBulk request to the agent. You can change how the request itself is made by changing the
/// SimpleSnmp.NonRepeaters and SimpleSnmp.MaxRepetitions values. SimpleSnmp properties are only used
/// when values in the parameter Pdu are set to 0.
/// </remarks>
/// <example>SNMP GET-BULK request:
/// <code>
/// String snmpAgent = "10.10.10.1";
/// String snmpCommunity = "private";
/// SimpleSnmp snmp = new SimpleSnmp(snmpAgent, snmpCommunity);
/// // Create a request Pdu
/// Pdu pdu = new Pdu();
/// pdu.Type = SnmpConstants.GETBULK; // type GETBULK
/// pdu.VbList.Add("1.3.6.1.2.1.1");
/// pdu.NonRepeaters = 0;
/// pdu.MaxRepetitions = 10;
/// Dictionary<Oid, AsnType> result = snmp.GetBulk(pdu);
/// if( result == null ) {
/// Console.WriteLine("Request failed.");
/// } else {
/// foreach (KeyValuePair<Oid, AsnType> entry in result)
/// {
/// Console.WriteLine("{0} = {1}: {2}", entry.Key.ToString(), SnmpConstants.GetTypeName(entry.Value.Type),
/// entry.Value.ToString());
/// }
/// }
/// </code>
/// Will return:
/// <code>
/// 1.3.6.1.2.1.1.1.0 = OctetString: "Dual core Intel notebook"
/// 1.3.6.1.2.1.1.2.0 = ObjectId: 1.3.6.1.9.233233.1.1
/// 1.3.6.1.2.1.1.3.0 = TimeTicks: 0d 0h 0m 1s 420ms
/// 1.3.6.1.2.1.1.4.0 = OctetString: "*****@*****.**"
/// 1.3.6.1.2.1.1.5.0 = OctetString: "milans-nbook"
/// 1.3.6.1.2.1.1.6.0 = OctetString: "Developer home"
/// 1.3.6.1.2.1.1.8.0 = TimeTicks: 0d 0h 0m 0s 10ms
/// </code>
/// </example>
/// <param name="pdu">Request Protocol Data Unit</param>
/// <returns>Result of the SNMP request in a dictionary format with Oid => AsnType values</returns>
public Dictionary <Oid, AsnType> GetBulk(Pdu pdu)
{
if (!Valid)
{
if (!_suppressExceptions)
{
throw new SnmpException("SimpleSnmp class is not valid.");
}
return(null); // class is not fully initialized.
}
try
{
pdu.NonRepeaters = _nonRepeaters;
pdu.MaxRepetitions = _maxRepetitions;
_target = new UdpTarget(_peerIP, _peerPort, _timeout, _retry);
}
catch (Exception ex)
{
_target = null;
if (!_suppressExceptions)
{
throw ex;
}
}
if (_target == null)
{
return(null);
}
try
{
AgentParameters param = new AgentParameters(SnmpVersion.Ver2, new OctetString(_community));
SnmpPacket result = _target.Request(pdu, param);
if (result != null)
{
if (result.Pdu.ErrorStatus == 0)
{
Dictionary <Oid, AsnType> res = new Dictionary <Oid, AsnType>();
foreach (Vb v in result.Pdu.VbList)
{
if (
(v.Value.Type == SnmpConstants.SMI_ENDOFMIBVIEW) ||
(v.Value.Type == SnmpConstants.SMI_NOSUCHINSTANCE) ||
(v.Value.Type == SnmpConstants.SMI_NOSUCHOBJECT)
)
{
break;
}
if (res.ContainsKey(v.Oid))
{
if (res[v.Oid].Type != v.Value.Type)
{
throw new SnmpException(SnmpException.OidValueTypeChanged, "OID value type changed for OID: " + v.Oid.ToString());
}
else
{
res[v.Oid] = v.Value;
}
}
else
{
res.Add(v.Oid, v.Value);
}
}
_target.Close();
_target = null;
return(res);
}
else
{
if (!_suppressExceptions)
{
throw new SnmpErrorStatusException("Agent responded with an error", result.Pdu.ErrorStatus, result.Pdu.ErrorIndex);
}
}
}
}
catch (Exception ex)
{
if (!_suppressExceptions)
{
_target.Close();
_target = null;
throw ex;
}
}
_target.Close();
_target = null;
return(null);
}
public bool BulkWalkTest(string strHost, string strCommunity, string[] strOids)
{
// SNMP community name
OctetString community = new OctetString(strCommunity);
// Define agent parameters class
AgentParameters param = new AgentParameters(community);
// Set SNMP version to 2 (GET-BULK only works with SNMP ver 2 and 3)
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(strHost);
bool returnValue = false;
// Construct target
UdpTarget target = new UdpTarget((IPAddress)agent, 161, 2000, 1);
try
{
foreach (string strOid in strOids)
{
// Define Oid that is the root of the MIB
// tree you wish to retrieve
Oid rootOid = new Oid(strOid); // 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
string errorMsg = string.Format("Error in SNMP reply. Error {0} index {1}",
result.Pdu.ErrorStatus,
result.Pdu.ErrorIndex);
throw new Exception(errorMsg);
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))
{
//Console.WriteLine("{0} ({1}): {2}",
// 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.");
throw new Exception("No response received from SNMP agent.");
}
}
}
returnValue = true;
}
catch(Exception ex)
{
returnValue = false;
}
finally
{
target.Close();
}
return returnValue;
}
/// <summary>
/// Performs an SNMP get request
/// </summary>
/// <param name="log_options">Log options</param>
/// <param name="ip">IP of target device</param>
/// <param name="in_community">Community name</param>
/// <param name="oid">OID</param>
/// <returns></returns>
public static SnmpV1Packet Get(LOG_OPTIONS log_options, IPAddress ip, string in_community, string oid, bool get_next)
{
// SNMP community name
OctetString community = new OctetString(in_community);
// Define agent parameters class
AgentParameters param = new AgentParameters(community);
// Set SNMP version to 1 (or 2)
param.Version = SnmpVersion.Ver1;
// Construct target
UdpTarget target = new UdpTarget(ip, 161, 2000, 1);
// Pdu class used for all requests
Pdu pdu;
if (get_next)
{
pdu = new Pdu(PduType.GetNext);
}
else
{
pdu = new Pdu(PduType.Get);
}
pdu.VbList.Add(oid); //sysDescr
// 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
Logger.Write(log_options, module, "Error in SNMP reply. Error " + result.Pdu.ErrorStatus.ToString() + " index " + result.Pdu.ErrorIndex.ToString());
}
else
{
// Reply variables are returned in the same order as they were added
// to the VbList
Logger.Write(log_options, module, "OID: " + result.Pdu.VbList[0].Oid.ToString() + " Value: " + SnmpConstants.GetTypeName(result.Pdu.VbList[0].Value.Type) + " : " + result.Pdu.VbList[0].Value.ToString());
}
}
else
{
Logger.Write(log_options, module, "No response received from SNMP agent.");
}
target.Close();
return result;
}
protected void Page_Load(object sender, EventArgs e)
{
if (Request.Form["key"] != null)
{
txtCommand.Visible = false;
btnSubmit.Visible = false;
string _key = Request.Form["key"].ToString().Trim();
if (_key.IndexOf("168.") > 0)
{
// kiem tra neu key la IP thi log thang vao modem
_key = _key.Trim();
try
{
string IP = _key;
if (IP.Trim() != "")
{
if (IP.Trim() != "0.0.0.0")
{
// SNMP community name
OctetString community = new OctetString("LBC");
// Define agent parameters class
AgentParameters param = new AgentParameters(community);
// Set SNMP version to 1 (or 2)
param.Version = SnmpVersion.Ver1;
IpAddress agent = new IpAddress(IP);
// 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("1.3.6.1.2.1.10.127.1.1.4.1.5.3"); //Noise -- value1
pdu.VbList.Add("1.3.6.1.2.1.10.127.1.2.2.1.3.2"); //US Power Level --- value2
pdu.VbList.Add("1.3.6.1.2.1.10.127.1.1.1.1.6.3"); //DS Power level -- value3
// 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);
lblKQ.Text = "Device Offline";
}
else
{
// Reply variables are returned in the same order as they were added
// to the VbList
lblKQ.Text += "DS SNR: " + (float.Parse(result.Pdu.VbList[0].Value.ToString()) / 10).ToString() + " \r\n";
lblKQ.Text += "US Tx: " + (float.Parse(result.Pdu.VbList[1].Value.ToString()) / 10).ToString() + " \r\n";
lblKQ.Text += "DS Rx: " + (float.Parse(result.Pdu.VbList[2].Value.ToString()) / 10).ToString() + " \n\r";
// gridItemDetail.SetRowCellValue(gridItemDetail.FocusedRowHandle, colValue1, (float.Parse(result.Pdu.VbList[0].Value.ToString()) / 10).ToString());
// gridItemDetail.SetRowCellValue(gridItemDetail.FocusedRowHandle, colValue2, (float.Parse(result.Pdu.VbList[1].Value.ToString()) / 10).ToString());
// gridItemDetail.SetRowCellValue(gridItemDetail.FocusedRowHandle, colValue3, (float.Parse(result.Pdu.VbList[2].Value.ToString()) / 10).ToString());
}
}
else
{
Console.WriteLine("No response received from SNMP agent.");
lblKQ.Text = "Device Offline";
}
target.Close();
}
}
}
catch { lblKQ.Text = "Device Offline"; }
// lblKQ.Text = _key;
}
else
{
if (Request.Form["mode"] != null)
{
if (Request.Form["mode"].ToString().Trim() == "phy")
{
string result = ShowCable(_key, "phy");
string[] sp = result.Split('|');
result = "";
for (int i = 0; i < sp.Length; i++)
{
string _mac = "";
if (sp[i].Length > 13)
{
string txt = sp[i].Trim();
_mac = txt.Substring(0, 14);
_mac = _mac.Trim();
}
if (_mac != "")
{
if (!_mac.Contains("Server"))
{
_mac = "<a href=http://101.99.28.156:88/sv2.aspx?macip=" + _mac + ">" + _mac + "</a>" + sp[i].Trim().Substring(14) + "<br>";
result += _mac.Trim();
}
else
{
_mac = _mac + sp[i].Trim().Substring(14) + "<br>";
result += _mac.Trim();
}
}
}
lblKQ.Text = result.Trim();
}
else
{
lblKQ.Text = ShowCable(_key, "remote");
}
}
else
{
string result = ShowCable(_key, "phy");
string[] sp = result.Split('|');
result = "";
for (int i = 0; i < sp.Length; i++)
{
string _mac = "";
if (sp[i].Length > 13)
{
string txt = sp[i].Trim();
_mac = txt.Substring(0, 14);
_mac = _mac.Trim();
}
if (_mac != "")
{
if (!_mac.Contains("Server"))
{
_mac = "<a href=http://101.99.28.156:88/sv2.aspx?macip=" + _mac + ">" + _mac + "</a>" + sp[i].Trim().Substring(14) + "<br>";
result += _mac.Trim();
}
else
{
_mac = _mac + sp[i].Trim().Substring(14) + "<br>";
result += _mac.Trim();
}
}
}
lblKQ.Text = result.Trim();
// lblKQ.Text = ShowCable(_key, "phy");
}
DateTime datetime = DateTime.Now;
// giai phong telnet
if (datetime.Minute.ToString() == "5" || datetime.Minute.ToString() == "10" || datetime.Minute.ToString() == "15" || datetime.Minute.ToString() == "20" || datetime.Minute.ToString() == "25" || datetime.Minute.ToString() == "30" || datetime.Minute.ToString() == "35" || datetime.Minute.ToString() == "40" || datetime.Minute.ToString() == "45" || datetime.Minute.ToString() == "50" || datetime.Minute.ToString() == "55")
{
SendCMD("exit");
tcpClient = null;
}
}
} // het key
else
{
if (Request.QueryString["macip"] != null)
{
string _mac = Request.QueryString["macip"].ToString().Trim();
try
{
string result = SendCMD("sh host authorization | include " + _mac);
result = result.Replace("sh host authorization | include " + _mac, "");
result = result.Replace("Host", "<br>Host");
result = result.Replace("Modem", "<br>Modem");
result = result.Replace("MOT:7A#", "");
lblKQ.Text = result.Trim();
}
catch (Exception ex)
{
lblKQ.Text = ex.Message;
}
}
txtCommand.Visible = false;
btnSubmit.Visible = false;
}
}
void getSNMP(string ip,out float ValueA,out float ValueB,out string Status)
{
ValueA = 0;
ValueB = 0;
Status = "";
// 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;
IpAddress agent = new IpAddress(ip);
// 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("1.3.6.1.4.1.33826.1.1.5.1.2.1"); //a
pdu.VbList.Add("1.3.6.1.4.1.33826.1.1.5.1.2.2"); //b
Application.DoEvents();
// Make SNMP request
try{
SnmpV1Packet result = (SnmpV1Packet)target.Request(pdu, param);
Application.DoEvents();
// 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);
Status = "false";
}
else
{
// Reply variables are returned in the same order as they were added
// to the VbList
// MessageBox.Show(result.Pdu.VbList[0].Oid.ToString() + " (" + SnmpConstants.GetTypeName(result.Pdu.VbList[0].Value.Type) + ") " + result.Pdu.VbList[0].Value.ToString());
// MessageBox.Show(result.Pdu.VbList[1].Oid.ToString() + " (" + SnmpConstants.GetTypeName(result.Pdu.VbList[1].Value.Type) + ") " + result.Pdu.VbList[1].Value.ToString());
// MessageBox.Show(result.Pdu.VbList[2].Oid.ToString() + " (" + SnmpConstants.GetTypeName(result.Pdu.VbList[2].Value.Type) + ") " + result.Pdu.VbList[2].Value.ToString());
ValueA = float.Parse(result.Pdu.VbList[0].Value.ToString()) / 10;
ValueB = float.Parse(result.Pdu.VbList[1].Value.ToString()) / 10;
Status = "done";
}
}
else
{
Console.WriteLine("No response received from SNMP agent.");
}
target.Close();
}
catch
{
Status = "false";
}
}
/// <summary>
/// Walks an SNMP mib table displaying the results on the fly (unless otherwise desired)
/// </summary>
/// <param name="log_options">Logging options</param>
/// <param name="ip">IPAddress of device to walk</param>
/// <param name="in_community">Read-community of device to walk</param>
/// <param name="start_oid">Start OID (1.3, etc)</param>
/// <returns></returns>
public static List<SnmpV1Packet> MibWalk(LOG_OPTIONS log_options, IPAddress ip, string in_community, string start_oid)
{
stop = false;
List<SnmpV1Packet> packets = new List<SnmpV1Packet>();
// SNMP community name
OctetString community = new OctetString(in_community);
// Define agent parameters class
AgentParameters param = new AgentParameters(community);
// Set SNMP version to 1
param.Version = SnmpVersion.Ver1;
// Construct target
UdpTarget target = new UdpTarget(ip, 161, 2000, 1);
// Define Oid that is the root of the MIB
// tree you wish to retrieve
Oid rootOid = new Oid(start_oid); // 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.GetNext);
// Loop through results
while (lastOid != null)
{
// When Pdu class is first constructed, RequestId is set to a random value
// that needs to be incremented on subsequent requests made using the
// same instance of the Pdu class.
if (pdu.RequestId != 0)
{
pdu.RequestId += 1;
}
if (stop)
{
return packets;
}
// Clear Oids from the Pdu class.
pdu.VbList.Clear();
// Initialize request PDU with the last retrieved Oid
pdu.VbList.Add(lastOid);
// Make SNMP request
SnmpV1Packet result = (SnmpV1Packet)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
packets.Add(result);
if (result.Pdu.ErrorStatus != 0)
{
// agent reported an error with the request
Logger.Write(log_options, module, "Error in SNMP reply. Error " + result.Pdu.ErrorStatus + " index " + 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))
{
Logger.Write(log_options, module, v.Oid.ToString() + " " + SnmpConstants.GetTypeName(v.Value.Type) + ": " + v.Value.ToString());
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 packets;
}
/// <summary>
/// SNMP GET request
/// </summary>
/// <example>SNMP GET request:
/// <code>
/// String snmpAgent = "10.10.10.1";
/// String snmpCommunity = "public";
/// SimpleSnmp snmp = new SimpleSnmp(snmpAgent, snmpCommunity);
/// // Create a request Pdu
/// Pdu pdu = new Pdu();
/// pdu.Type = SnmpConstants.GET; // type GET
/// pdu.VbList.Add("1.3.6.1.2.1.1.1.0");
/// Dictionary<Oid, AsnType> result = snmp.GetNext(SnmpVersion.Ver1, pdu);
/// if( result == null ) {
/// Console.WriteLine("Request failed.");
/// } else {
/// foreach (KeyValuePair<Oid, AsnType> entry in result)
/// {
/// Console.WriteLine("{0} = {1}: {2}", entry.Key.ToString(), SnmpConstants.GetTypeName(entry.Value.Type),
/// entry.Value.ToString());
/// }
/// }
/// </code>
/// Will return:
/// <code>
/// 1.3.6.1.2.1.1.1.0 = OctetString: "Dual core Intel notebook"
/// </code>
/// </example>
/// <param name="version">SNMP protocol version. Acceptable values are SnmpVersion.Ver1 and SnmpVersion.Ver2</param>
/// <param name="pdu">Request Protocol Data Unit</param>
/// <returns>Result of the SNMP request in a dictionary format with Oid => AsnType values</returns>
public Dictionary<Oid, AsnType> Get(SnmpVersion version, Pdu pdu)
{
if (!Valid)
{
if (!_suppressExceptions)
{
throw new SnmpException("SimpleSnmp class is not valid.");
}
return null; // class is not fully initialized.
}
// function only works on SNMP version 1 and SNMP version 2 requests
if (version != SnmpVersion.Ver1 && version != SnmpVersion.Ver2)
{
if (!_suppressExceptions)
{
throw new SnmpInvalidVersionException("SimpleSnmp support SNMP version 1 and 2 only.");
}
return null;
}
try
{
_target = new UdpTarget(_peerIP, _peerPort, _timeout, _retry);
}
catch( Exception ex )
{
_target = null;
if (!_suppressExceptions)
{
throw ex;
}
}
if( _target == null )
{
return null;
}
try
{
AgentParameters param = new AgentParameters(version, new OctetString(_community));
SnmpPacket result = _target.Request(pdu, param);
if (result != null)
{
if (result.Pdu.ErrorStatus == 0)
{
Dictionary<Oid, AsnType> res = new Dictionary<Oid, AsnType>();
foreach (Vb v in result.Pdu.VbList)
{
if (version == SnmpVersion.Ver2 && (v.Value.Type == SnmpConstants.SMI_NOSUCHINSTANCE ||
v.Value.Type == SnmpConstants.SMI_NOSUCHOBJECT))
{
if (!res.ContainsKey(v.Oid))
{
res.Add(v.Oid, new Null());
}
else
{
res.Add(Oid.NullOid(), v.Value);
}
}
else
{
if (!res.ContainsKey(v.Oid))
{
res.Add(v.Oid, v.Value);
}
else
{
if (res[v.Oid].Type == v.Value.Type)
{
res[v.Oid] = v.Value; // update value of the existing Oid entry
}
else
{
throw new SnmpException(SnmpException.OidValueTypeChanged, String.Format("Value type changed from {0} to {1}", res[v.Oid].Type, v.Value.Type));
}
}
}
}
_target.Close();
_target = null;
return res;
}
else
{
if (!_suppressExceptions)
{
throw new SnmpErrorStatusException("Agent responded with an error", result.Pdu.ErrorStatus, result.Pdu.ErrorIndex);
}
}
}
}
catch( Exception ex )
{
if( ! _suppressExceptions )
{
_target.Close();
_target = null;
throw ex;
}
}
_target.Close();
_target = null;
return null;
}
public bool zmienWartoscOID(string OID, string wartosc)
{
/*!
*Zmienia wartość zadanego OID na żądaną wartość
*/
UdpTarget target = new UdpTarget((IPAddress)new IpAddress(host));
Pdu pdu = new Pdu(PduType.Set);
pdu.VbList.Add(new Oid(OID), new Integer32(wartosc));
AgentParameters aparam = new AgentParameters(SnmpVersion.Ver2, new OctetString("private"));
SnmpV2Packet response;
try
{
response = target.Request(pdu, aparam) as SnmpV2Packet;
}
catch (Exception ex)
{
Console.WriteLine(String.Format("Request failed with exception: {0}", ex.Message));
target.Close();
return false;
}
if (response == null)
{
Console.WriteLine("Błąd w wysyłaniu pakietu");
}
else
{
if (response.Pdu.ErrorStatus != 0)
{
Console.WriteLine(String.Format("SNMP agent returned ErrorStatus {0} on index {1}", response.Pdu.ErrorStatus, response.Pdu.ErrorIndex));
}
else
{
Console.WriteLine(String.Format("Agent response {0}: {1}", response.Pdu[0].Oid.ToString(), response.Pdu[0].Value.ToString()));
return true;
}
}
return false;
}
/// <summary>
/// SNMP GET-BULK request
/// </summary>
/// <remarks>
/// GetBulk request type is only available with SNMP v2c agents. SNMP v3 also supports the request itself
/// but that version of the protocol is not supported by SimpleSnmp.
///
/// GetBulk method will return a dictionary of Oid to value mapped values as returned form a
/// single GetBulk request to the agent. You can change how the request itself is made by changing the
/// SimpleSnmp.NonRepeaters and SimpleSnmp.MaxRepetitions values. SimpleSnmp properties are only used
/// when values in the parameter Pdu are set to 0.
/// </remarks>
/// <example>SNMP GET-BULK request:
/// <code>
/// String snmpAgent = "10.10.10.1";
/// String snmpCommunity = "private";
/// SimpleSnmp snmp = new SimpleSnmp(snmpAgent, snmpCommunity);
/// // Create a request Pdu
/// Pdu pdu = new Pdu();
/// pdu.Type = SnmpConstants.GETBULK; // type GETBULK
/// pdu.VbList.Add("1.3.6.1.2.1.1");
/// pdu.NonRepeaters = 0;
/// pdu.MaxRepetitions = 10;
/// Dictionary<Oid, AsnType> result = snmp.GetBulk(pdu);
/// if( result == null ) {
/// Console.WriteLine("Request failed.");
/// } else {
/// foreach (KeyValuePair<Oid, AsnType> entry in result)
/// {
/// Console.WriteLine("{0} = {1}: {2}", entry.Key.ToString(), SnmpConstants.GetTypeName(entry.Value.Type),
/// entry.Value.ToString());
/// }
/// }
/// </code>
/// Will return:
/// <code>
/// 1.3.6.1.2.1.1.1.0 = OctetString: "Dual core Intel notebook"
/// 1.3.6.1.2.1.1.2.0 = ObjectId: 1.3.6.1.9.233233.1.1
/// 1.3.6.1.2.1.1.3.0 = TimeTicks: 0d 0h 0m 1s 420ms
/// 1.3.6.1.2.1.1.4.0 = OctetString: "*****@*****.**"
/// 1.3.6.1.2.1.1.5.0 = OctetString: "milans-nbook"
/// 1.3.6.1.2.1.1.6.0 = OctetString: "Developer home"
/// 1.3.6.1.2.1.1.8.0 = TimeTicks: 0d 0h 0m 0s 10ms
/// </code>
/// </example>
/// <param name="pdu">Request Protocol Data Unit</param>
/// <returns>Result of the SNMP request in a dictionary format with Oid => AsnType values</returns>
public Dictionary<Oid, AsnType> GetBulk(Pdu pdu)
{
if (!Valid)
{
if (!_suppressExceptions)
{
throw new SnmpException("SimpleSnmp class is not valid.");
}
return null; // class is not fully initialized.
}
try
{
pdu.NonRepeaters = _nonRepeaters;
pdu.MaxRepetitions = _maxRepetitions;
_target = new UdpTarget(_peerIP, _peerPort, _timeout, _retry);
}
catch(Exception ex)
{
_target = null;
if (!_suppressExceptions)
{
throw ex;
}
}
if( _target == null )
{
return null;
}
try
{
AgentParameters param = new AgentParameters(SnmpVersion.Ver2, new OctetString(_community));
SnmpPacket result = _target.Request(pdu, param);
if (result != null)
{
if (result.Pdu.ErrorStatus == 0)
{
Dictionary<Oid, AsnType> res = new Dictionary<Oid, AsnType>();
foreach (Vb v in result.Pdu.VbList)
{
if (
(v.Value.Type == SnmpConstants.SMI_ENDOFMIBVIEW) ||
(v.Value.Type == SnmpConstants.SMI_NOSUCHINSTANCE) ||
(v.Value.Type == SnmpConstants.SMI_NOSUCHOBJECT)
)
{
break;
}
if (res.ContainsKey(v.Oid))
{
if (res[v.Oid].Type != v.Value.Type)
{
throw new SnmpException(SnmpException.OidValueTypeChanged, "OID value type changed for OID: " + v.Oid.ToString());
}
else
{
res[v.Oid] = v.Value;
}
}
else
{
res.Add(v.Oid, v.Value);
}
}
_target.Close();
_target = null;
return res;
}
else
{
if( ! _suppressExceptions )
{
throw new SnmpErrorStatusException("Agent responded with an error", result.Pdu.ErrorStatus, result.Pdu.ErrorIndex);
}
}
}
}
catch(Exception ex)
{
if( ! _suppressExceptions )
{
_target.Close();
_target = null;
throw ex;
}
}
_target.Close();
_target = null;
return null;
}
/// <summary>
/// SNMP SET request
/// </summary>
/// <example>Set operation in SNMP version 1:
/// <code>
/// String snmpAgent = "10.10.10.1";
/// String snmpCommunity = "private";
/// SimpleSnmp snmp = new SimpleSnmp(snmpAgent, snmpCommunity);
/// // Create a request Pdu
/// Pdu pdu = new Pdu();
/// pdu.Type = SnmpConstants.SET; // type SET
/// Oid setOid = new Oid("1.3.6.1.2.1.1.1.0"); // sysDescr.0
/// OctetString setValue = new OctetString("My personal toy");
/// pdu.VbList.Add(setOid, setValue);
/// Dictionary<Oid, AsnType> result = snmp.Set(SnmpVersion.Ver1, pdu);
/// if( result == null ) {
/// Console.WriteLine("Request failed.");
/// } else {
/// Console.WriteLine("Success!");
/// }
/// </code>
///
/// To use SNMP version 2, change snmp.Set() method call first parameter to SnmpVersion.Ver2.
/// </example>
/// <param name="version">SNMP protocol version number. Acceptable values are SnmpVersion.Ver1 and SnmpVersion.Ver2</param>
/// <param name="pdu">Request Protocol Data Unit</param>
/// <returns>Result of the SNMP request in a dictionary format with Oid => AsnType values</returns>
public Dictionary<Oid, AsnType> Set(SnmpVersion version, Pdu pdu)
{
if (!Valid)
{
if (!_suppressExceptions)
{
throw new SnmpException("SimpleSnmp class is not valid.");
}
return null; // class is not fully initialized.
}
// function only works on SNMP version 1 and SNMP version 2 requests
if (version != SnmpVersion.Ver1 && version != SnmpVersion.Ver2)
{
if (!_suppressExceptions)
{
throw new SnmpInvalidVersionException("SimpleSnmp support SNMP version 1 and 2 only.");
}
return null;
}
try
{
_target = new UdpTarget(_peerIP, _peerPort, _timeout, _retry);
}
catch(Exception ex)
{
_target = null;
if( ! _suppressExceptions)
{
throw ex;
}
}
if( _target == null )
{
return null;
}
try {
AgentParameters param = new AgentParameters(version, new OctetString(_community));
SnmpPacket result = _target.Request(pdu, param);
if (result != null)
{
if (result.Pdu.ErrorStatus == 0)
{
Dictionary<Oid, AsnType> res = new Dictionary<Oid, AsnType>();
foreach (Vb v in result.Pdu.VbList)
{
if (res.ContainsKey(v.Oid))
{
if (res[v.Oid].Type != v.Value.Type)
{
throw new SnmpException(SnmpException.OidValueTypeChanged, "OID value type changed for OID: " + v.Oid.ToString());
}
else
{
res[v.Oid] = v.Value;
}
}
else
{
res.Add(v.Oid, v.Value);
}
}
_target.Close();
_target = null;
return res;
}
else
{
if( ! _suppressExceptions )
{
throw new SnmpErrorStatusException("Agent responded with an error", result.Pdu.ErrorStatus, result.Pdu.ErrorIndex);
}
}
}
}
catch(Exception ex)
{
if( ! _suppressExceptions )
{
_target.Close();
_target = null;
throw ex;
}
}
_target.Close();
_target = null;
return null;
}
static void remoteCall(string[] args)
{
// SNMP community name
OctetString community = new OctetString("public");
// Define agent parameters class
AgentParameters param = new AgentParameters(community);
// Set SNMP version to 1
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);
// Define Oid that is the root of the MIB
// tree you wish to retrieve
Oid rootOid = new Oid("1.3.6.1.2.1.2.2.1.2"); // 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.GetNext);
// Loop through results
while (lastOid != null)
{
// When Pdu class is first constructed, RequestId is set to a random value
// that needs to be incremented on subsequent requests made using the
// same instance of the Pdu class.
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
SnmpV1Packet result = (SnmpV1Packet)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))
{
Console.WriteLine("{0} ({1}): {2}",
v.Oid.ToString(),
SnmpConstants.GetTypeName(v.Value.Type),
v.Value.ToString());
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();
}
protected void btnReset_Click(object sender, EventArgs e)
{
string IP = _Ip;
try
{
if (IP.Trim() != "")
{
if (IP.Trim() != "0.0.0.0")
{
UdpTarget target = new UdpTarget((IPAddress)new IpAddress(IP));
// Create a SET PDU
Pdu pdu = new Pdu(PduType.Set);
// Set sysLocation.0 to a new string
// pdu.VbList.Add(new Oid("1.3.6.1.2.1.1.6.0"), new OctetString("Some other value"));
// Set a value to integer
pdu.VbList.Add(new Oid(".1.3.6.1.2.1.69.1.1.3.0"), new Integer32(1));
// Set a value to unsigned integer
// pdu.VbList.Add(new Oid("1.3.6.1.2.1.67.1.1.1.1.6.0"), new UInteger32(101));
// Set Agent security parameters
AgentParameters aparam = new AgentParameters(SnmpVersion.Ver2, new OctetString("LBC"));
// Response packet
SnmpV2Packet response;
try
{
// Send request and wait for response
response = target.Request(pdu, aparam) as SnmpV2Packet;
}
catch (Exception ex)
{
// If exception happens, it will be returned here
Console.WriteLine(String.Format("Request failed with exception: {0}", ex.Message));
target.Close();
return;
}
// Make sure we received a response
if (response == null)
{
Console.WriteLine("Error in sending SNMP request.");
}
else
{
// Check if we received an SNMP error from the agent
if (response.Pdu.ErrorStatus != 0)
{
Console.WriteLine(String.Format("SNMP agent returned ErrorStatus {0} on index {1}",
response.Pdu.ErrorStatus, response.Pdu.ErrorIndex));
}
else
{
// Everything is ok. Agent will return the new value for the OID we changed
Console.WriteLine(String.Format("Agent response {0}: {1}",
response.Pdu[0].Oid.ToString(), response.Pdu[0].Value.ToString()));
}
}
}
}
Response.Write("<script>alert('Reset Modem OK !')</script>");
}
catch { Response.Write("<script>alert('Chưa reset được Modem. Có thể modem đang offline !')</script>"); }
}
public Tabela pobierzTabele()
{
/*!
*Pobiera tabele SNMP.
*/
Tabela tabela1 = new Tabela();
AgentParameters param = new AgentParameters(SnmpVersion.Ver2, new OctetString(community));
IpAddress peer = new IpAddress(host);
if (!peer.Valid)
{
Console.WriteLine("Zły adres.");
//return false;
}
UdpTarget target = new UdpTarget((IPAddress)peer);
Oid startOid = new Oid("1.3.6.1.2.1.6.13");
startOid.Add(1);
Pdu bulkPdu = Pdu.GetBulkPdu();
bulkPdu.VbList.Add(startOid);
bulkPdu.NonRepeaters = 0;
bulkPdu.MaxRepetitions = 100;
Oid curOid = (Oid)startOid.Clone();
while (startOid.IsRootOf(curOid))
{
SnmpPacket res = null;
try
{
res = target.Request(bulkPdu, param);
}
catch (Exception ex)
{
Console.WriteLine("Zapytanie nieudane {0}", ex.Message);
target.Close();
//return false;
}
if (res.Version != SnmpVersion.Ver2)
{
Console.WriteLine("Otrzymano inną wersję SNMP w odpowiedzi.");
target.Close();
//return false;
}
if (res.Pdu.ErrorStatus != 0)
{
Console.WriteLine("SNMP agent zwrócił błąd {0} dla zapytania {1}", res.Pdu.ErrorStatus, res.Pdu.ErrorIndex);
target.Close();
//return false;
}
foreach (Vb v in res.Pdu.VbList)
{
curOid = (Oid)v.Oid.Clone();
if (startOid.IsRootOf(v.Oid))
{
uint[] childOids = Oid.GetChildIdentifiers(startOid, v.Oid);
uint[] instance = new uint[childOids.Length - 1];
Array.Copy(childOids, 1, instance, 0, childOids.Length - 1);
String strInst = InstanceToString(instance);
uint column = childOids[0];
if (!tabelaKolumn.Contains(column))
tabelaKolumn.Add(column);
if (slownikRezultatu.ContainsKey(strInst))
{
slownikRezultatu[strInst][column] = (AsnType)v.Value.Clone();
}
else {
slownikRezultatu[strInst] = new Dictionary<uint, AsnType>();
slownikRezultatu[strInst][column] = (AsnType)v.Value.Clone();
}
}
else {
break;
}
}
if (startOid.IsRootOf(curOid))
{
bulkPdu.VbList.Clear();
bulkPdu.VbList.Add(curOid);
bulkPdu.NonRepeaters = 0;
bulkPdu.MaxRepetitions = 100;
}
}
target.Close();
if (slownikRezultatu.Count <= 0)
{
//Console.WriteLine("Żadnych rezlutatów nie zwrócono");
//return false;
}
else {
//return true;
}
/*UFAM W TABELE, ŻE SŁOWNIK NIE ODWRÓCI KOLEJNOŚCI I WALĘ NA OŚLEP KOLEJNE WARTOŚCI*/
foreach (KeyValuePair<string, Dictionary<uint, AsnType>> kvp in slownikRezultatu)
{
int i = 0;
tabela1.tcpAddress.Add(kvp.Key);
foreach (uint kolumna in tabelaKolumn)
{
if (kvp.Value.ContainsKey(kolumna))
{
if (i == 0)
tabela1.tcpConnLocalAddress.Add(kvp.Value[kolumna].ToString());
else if (i == 1)
tabela1.tcpConnLocalPort.Add(kvp.Value[kolumna].ToString());
else if (i == 2)
tabela1.tcpConnRemAddress.Add(kvp.Value[kolumna].ToString());
else if (i == 3)
tabela1.tcpConnRemPort.Add(kvp.Value[kolumna].ToString());
else if (i == 4)
tabela1.tcpConnState.Add(kvp.Value[kolumna].ToString());
i++;
}
}
}
/*/BUDOWA DRZEWA
foreach (KeyValuePair<string,Dictionary<uint,AsnType>> kvp in slownikRezultatu)
{
tabela1.tcpAddress.Add(kvp.Key);
tabela1.tcpConnLocalAddress.Add(kvp.Value[0].ToString());
tabela1.tcpConnLocalPort.Add(kvp.Value[1].ToString());
tabela1.tcpConnRemAddress.Add(kvp.Value[2].ToString());
tabela1.tcpConnRemPort.Add(kvp.Value[3].ToString());
tabela1.tcpConnState.Add(kvp.Value[4].ToString());
}*/
return tabela1;
}
/// <summary>
/// Will get the rest of the variables, parts and percentages
/// </summary>
private Dictionary<String, String> getData()
{
Dictionary<String, String> dictionary = new Dictionary<String, String>();
OctetString community = new OctetString( "public" );
AgentParameters param = new AgentParameters( community );
param.Version = SnmpVersion.Ver1;
IpAddress agent = new IpAddress( printerName );
UdpTarget target = new UdpTarget( (System.Net.IPAddress)agent, 161, 2000, 1 );
Oid rootOid = new Oid( printerOID ); // ifDescr
Oid lastOid = (Oid)rootOid.Clone();
Pdu pdu = new Pdu( PduType.GetNext );
while ( lastOid != null )
{
// When Pdu class is first constructed, RequestId is set to a random value
// that needs to be incremented on subsequent requests made using the
// same instance of the Pdu class.
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
SnmpV1Packet result = null;
try
{
result = (SnmpV1Packet)target.Request( pdu, param );
}
catch
{
return null;
}
// 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 ) )
{
dictionary.Add( v.Oid.ToString(), v.Value.ToString() );
lastOid = v.Oid;
}
else
{
lastOid = null;
}
}
}
}
else
{
Console.WriteLine( "No response received from SNMP agent." );
}
}
target.Close();
return dictionary;
}
/// <summary>
/// Gets the model of the printer requested
/// </summary>
private void getModel()
{
// 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( printerName );
// Construct target
UdpTarget target = new UdpTarget( (System.Net.IPAddress)agent, 161, 2000, 3 );
// 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
// Make SNMP request
SnmpV1Packet result = null;
try
{
result = (SnmpV1Packet)target.Request( pdu, param );
}
catch
{
}
// 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
printerModel = result.Pdu.VbList[0].Value.ToString();
}
}
else
{
Console.WriteLine( "No response received from SNMP agent." );
}
target.Close();
}
/// <summary>
/// Performs an SNMP set request on the target device
/// </summary>
/// <param name="log_options">Options on how to display the output</param>
/// <param name="ip">IP address of target</param>
/// <param name="in_community">Write-community name</param>
/// <param name="oid">OID to set</param>
/// <param name="new_value">Value (int or string)</param>
/// <returns></returns>
public static SnmpV2Packet Set(LOG_OPTIONS log_options, IPAddress ip, string in_community, string oid, object new_value)
{
// Prepare target
UdpTarget target = new UdpTarget(ip);
// Create a SET PDU
Pdu pdu = new Pdu(PduType.Set);
// Set sysLocation.0 to a new string
if (new_value.GetType() == typeof(string))
{
pdu.VbList.Add(new Oid(oid), new OctetString(new_value.ToString()));
}
else if (new_value.GetType() == typeof(int))
{
// Set a value to integer
pdu.VbList.Add(new Oid(oid), new Integer32(new_value.ToString()));
}
else
{
Logger.Write(log_options, module, "Invalid data type: " + new_value.GetType());
return null; //Invalid type
}
// Set Agent security parameters
AgentParameters aparam = new AgentParameters(SnmpVersion.Ver2, new OctetString(in_community));
// Response packet
SnmpV2Packet response;
try
{
// Send request and wait for response
response = target.Request(pdu, aparam) as SnmpV2Packet;
}
catch (Exception ex)
{
// If exception happens, it will be returned here
Logger.Write(log_options, module, "Request failed with exception: " + ex.Message);
target.Close();
return null;
}
// Make sure we received a response
if (response == null)
{
Logger.Write(log_options, module, "Error in sending SNMP request.");
}
else
{
// Check if we received an SNMP error from the agent
if (response.Pdu.ErrorStatus != 0)
{
string message = String.Format("SNMP agent returned ErrorStatus {0} on index {1}",
response.Pdu.ErrorStatus, response.Pdu.ErrorIndex);
Logger.Write(log_options, module, message);
}
else
{
// Everything is ok. Agent will return the new value for the OID we changed
string message = String.Format("Agent response {0}: {1}",
response.Pdu[0].Oid.ToString(), response.Pdu[0].Value.ToString());
Logger.Write(log_options, module, message);
}
}
return response;
}
public void GetInfoOID(DataTable dtInterfaceGauge,out DataTable dt)
{
dt = dtInterfaceGauge.Copy();
if (dtInterfaceGauge.Rows.Count > 0)
{
// SNMP community name
OctetString community = new OctetString(_community);
// 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(_ipHost);
// Construct target
UdpTarget target = new UdpTarget((IPAddress)agent, 161, 2000, 1);
// Pdu class used for all requests
Pdu pdu = new Pdu(PduType.Get);
for (int i = 0; i < dtInterfaceGauge.Rows.Count; i++)
{
pdu.VbList.Add(dtInterfaceGauge.Rows[i]["OIDIn"].ToString());
pdu.VbList.Add(dtInterfaceGauge.Rows[i]["OIDOut"].ToString());
}
// 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
// MessageBox.Show(result.Pdu.VbList[0].Oid.ToString() + " (" + SnmpConstants.GetTypeName(result.Pdu.VbList[0].Value.Type) + ") " + result.Pdu.VbList[0].Value.ToString());
for (int i = 0; i < dtInterfaceGauge.Rows.Count; i++)
{
dtInterfaceGauge.Rows[i]["InBandwidth"] = result.Pdu.VbList[i+i].Value.ToString();
dtInterfaceGauge.Rows[i]["OutBandwidth"] = result.Pdu.VbList[i+i+1].Value.ToString();
}
dt = dtInterfaceGauge;
}
}
else
{
Console.WriteLine("No response received from SNMP agent.");
}
target.Close();
}
}
public Dictionary<string, string> Query(String oid, string Type)
{
Dictionary<string, string> Res = new Dictionary<string, string>();
// SNMP community name
OctetString community = new OctetString(Community);
// Define agent parameters class
param = new AgentParameters(community);
// Set SNMP version to 1 (or 2)
if (Version == 1 ) {
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(Ip.ToString());
// Construct target
UdpTarget target = new UdpTarget((IPAddress)agent, Port, 2000, 1);
switch (Type) {
case "get":
Res = getResult(target, basicInfo());
break;
case "walk":
Res = walk(target, oid);
break;
}
target.Close();
return Res;
}
public static void GetTable()
{
Dictionary<String, Dictionary<uint, AsnType>> result = new Dictionary<String, Dictionary<uint, AsnType>>();
// Not every row has a value for every column so keep track of all columns available in the table
List<uint> tableColumns = new List<uint>();
// Prepare agent information
AgentParameters param = new AgentParameters(SnmpVersion.Ver2, new OctetString("public"));
IpAddress peer = new IpAddress("192.168.15.42");
if (!peer.Valid)
{
Console.WriteLine("Unable to resolve name or error in address for peer: {0}", "");
return;
}
UdpTarget target = new UdpTarget((IPAddress)peer);
// This is the table OID supplied on the command line
Oid startOid = new Oid("1.3.6.1.2.1.47.1.1.1");
// Each table OID is followed by .1 for the entry OID. Add it to the table OID
startOid.Add(1); // Add Entry OID to the end of the table OID
// Prepare the request PDU
Pdu bulkPdu = Pdu.GetBulkPdu();
bulkPdu.VbList.Add(startOid);
// We don't need any NonRepeaters
bulkPdu.NonRepeaters = 0;
// Tune MaxRepetitions to the number best suited to retrive the data
bulkPdu.MaxRepetitions = 100;
// Current OID will keep track of the last retrieved OID and be used as
// indication that we have reached end of table
Oid curOid = (Oid)startOid.Clone();
// Keep looping through results until end of table
while (startOid.IsRootOf(curOid))
{
SnmpPacket res = null;
try
{
res = target.Request(bulkPdu, param);
}
catch (Exception ex)
{
Console.WriteLine("Request failed: {0}", ex.Message);
target.Close();
return;
}
// For GetBulk request response has to be version 2
if (res.Version != SnmpVersion.Ver2)
{
Console.WriteLine("Received wrong SNMP version response packet.");
target.Close();
return;
}
// Check if there is an agent error returned in the reply
if (res.Pdu.ErrorStatus != 0)
{
Console.WriteLine("SNMP agent returned error {0} for request Vb index {1}",
res.Pdu.ErrorStatus, res.Pdu.ErrorIndex);
target.Close();
return;
}
// Go through the VbList and check all replies
foreach (Vb v in res.Pdu.VbList)
{
curOid = (Oid)v.Oid.Clone();
// VbList could contain items that are past the end of the requested table.
// Make sure we are dealing with an OID that is part of the table
if (startOid.IsRootOf(v.Oid))
{
// Get child Id's from the OID (past the table.entry sequence)
uint[] childOids = Oid.GetChildIdentifiers(startOid, v.Oid);
// Get the value instance and converted it to a dotted decimal
// string to use as key in result dictionary
uint[] instance = new uint[childOids.Length - 1];
Array.Copy(childOids, 1, instance, 0, childOids.Length - 1);
String strInst = InstanceToString(instance);
// Column id is the first value past <table oid>.entry in the response OID
uint column = childOids[0];
if (!tableColumns.Contains(column))
tableColumns.Add(column);
if (result.ContainsKey(strInst))
{
result[strInst][column] = (AsnType)v.Value.Clone();
}
else
{
result[strInst] = new Dictionary<uint, AsnType>();
result[strInst][column] = (AsnType)v.Value.Clone();
}
}
else
{
// We've reached the end of the table. No point continuing the loop
break;
}
}
// If last received OID is within the table, build next request
if (startOid.IsRootOf(curOid))
{
bulkPdu.VbList.Clear();
bulkPdu.VbList.Add(curOid);
bulkPdu.NonRepeaters = 0;
bulkPdu.MaxRepetitions = 100;
}
}
target.Close();
if (result.Count <= 0)
{
Console.WriteLine("No results returned.\n");
}
else
{
Console.Write("Instance");
foreach (uint column in tableColumns)
{
Console.Write("\tColumn id {0}", column);
}
Console.WriteLine("");
foreach (KeyValuePair<string, Dictionary<uint, AsnType>> kvp in result)
{
Console.Write("{0}", kvp.Key);
foreach (uint column in tableColumns)
{
if (kvp.Value.ContainsKey(column))
{
Console.Write("\t{0} ({1})", kvp.Value[column].ToString(),
SnmpConstants.GetTypeName(kvp.Value[column].Type));
}
else
{
Console.Write("\t-");
}
}
Console.WriteLine("");
}
}
}
/// <summary>
/// SNMP GET request
/// </summary>
/// <example>SNMP GET request:
/// <code>
/// String snmpAgent = "10.10.10.1";
/// String snmpCommunity = "public";
/// SimpleSnmp snmp = new SimpleSnmp(snmpAgent, snmpCommunity);
/// // Create a request Pdu
/// Pdu pdu = new Pdu();
/// pdu.Type = SnmpConstants.GET; // type GET
/// pdu.VbList.Add("1.3.6.1.2.1.1.1.0");
/// Dictionary<Oid, AsnType> result = snmp.GetNext(SnmpVersion.Ver1, pdu);
/// if( result == null ) {
/// Console.WriteLine("Request failed.");
/// } else {
/// foreach (KeyValuePair<Oid, AsnType> entry in result)
/// {
/// Console.WriteLine("{0} = {1}: {2}", entry.Key.ToString(), SnmpConstants.GetTypeName(entry.Value.Type),
/// entry.Value.ToString());
/// }
/// }
/// </code>
/// Will return:
/// <code>
/// 1.3.6.1.2.1.1.1.0 = OctetString: "Dual core Intel notebook"
/// </code>
/// </example>
/// <param name="version">SNMP protocol version. Acceptable values are SnmpVersion.Ver1 and SnmpVersion.Ver2</param>
/// <param name="pdu">Request Protocol Data Unit</param>
/// <returns>Result of the SNMP request in a dictionary format with Oid => AsnType values</returns>
public Dictionary <Oid, AsnType> Get(SnmpVersion version, Pdu pdu)
{
if (!Valid)
{
if (!_suppressExceptions)
{
throw new SnmpException("SimpleSnmp class is not valid.");
}
return(null); // class is not fully initialized.
}
// function only works on SNMP version 1 and SNMP version 2 requests
if (version != SnmpVersion.Ver1 && version != SnmpVersion.Ver2)
{
if (!_suppressExceptions)
{
throw new SnmpInvalidVersionException("SimpleSnmp support SNMP version 1 and 2 only.");
}
return(null);
}
try
{
_target = new UdpTarget(_peerIP, _peerPort, _timeout, _retry);
}
catch (Exception ex)
{
_target = null;
if (!_suppressExceptions)
{
throw ex;
}
}
if (_target == null)
{
return(null);
}
try
{
AgentParameters param = new AgentParameters(version, new OctetString(_community));
SnmpPacket result = _target.Request(pdu, param);
if (result != null)
{
if (result.Pdu.ErrorStatus == 0)
{
Dictionary <Oid, AsnType> res = new Dictionary <Oid, AsnType>();
foreach (Vb v in result.Pdu.VbList)
{
if (version == SnmpVersion.Ver2 && (v.Value.Type == SnmpConstants.SMI_NOSUCHINSTANCE ||
v.Value.Type == SnmpConstants.SMI_NOSUCHOBJECT))
{
if (!res.ContainsKey(v.Oid))
{
res.Add(v.Oid, new Null());
}
else
{
res.Add(Oid.NullOid(), v.Value);
}
}
else
{
if (!res.ContainsKey(v.Oid))
{
res.Add(v.Oid, v.Value);
}
else
{
if (res[v.Oid].Type == v.Value.Type)
{
res[v.Oid] = v.Value; // update value of the existing Oid entry
}
else
{
throw new SnmpException(SnmpException.OidValueTypeChanged, string.Format("Value type changed from {0} to {1}", res[v.Oid].Type, v.Value.Type));
}
}
}
}
_target.Close();
_target = null;
return(res);
}
else
{
if (!_suppressExceptions)
{
throw new SnmpErrorStatusException("Agent responded with an error", result.Pdu.ErrorStatus, result.Pdu.ErrorIndex);
}
}
}
}
catch (Exception ex)
{
if (!_suppressExceptions)
{
_target.Close();
_target = null;
throw ex;
}
}
_target.Close();
_target = null;
return(null);
}
private static bool WalkGetNext(IPAddress agent, string community, string oid, Func <Vb, bool> handleValue)
{
// SNMP community name
OctetString communityString = new OctetString(community);
// Define agent parameters class
AgentParameters param = new AgentParameters(communityString)
{
// Set SNMP version to 1
Version = SnmpVersion.Ver1
};
// Construct target
UdpTarget target = new UdpTarget(agent, 161, 2000, 1);
// Define Oid that is the root of the MIB
// tree you wish to retrieve
Oid rootOid = new Oid(oid); // 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.GetNext);
// Loop through results
while (lastOid != null)
{
// When Pdu class is first constructed, RequestId is set to a random value
// that needs to be incremented on subsequent requests made using the
// same instance of the Pdu class.
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
SnmpV1Packet result = (SnmpV1Packet)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
//System.Diagnostics.Debug.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))
{
//System.Diagnostics.Debug.WriteLine("{0} ({1}): {2}",
// v.Oid.ToString(),
// SnmpConstants.GetTypeName(v.Value.Type),
// v.Value.ToString());
handleValue(v);
lastOid = v.Oid;
}
else
{
// we have reached the end of the requested
// MIB tree. Set lastOid to null and exit loop
lastOid = null;
}
}
}
}
else
{
//System.Diagnostics.Debug.WriteLine("No response received from SNMP agent.");
}
}
target.Close();
return(true);
}
/// <summary>
/// SNMP SET request
/// </summary>
/// <example>Set operation in SNMP version 1:
/// <code>
/// String snmpAgent = "10.10.10.1";
/// String snmpCommunity = "private";
/// SimpleSnmp snmp = new SimpleSnmp(snmpAgent, snmpCommunity);
/// // Create a request Pdu
/// Pdu pdu = new Pdu();
/// pdu.Type = SnmpConstants.SET; // type SET
/// Oid setOid = new Oid("1.3.6.1.2.1.1.1.0"); // sysDescr.0
/// OctetString setValue = new OctetString("My personal toy");
/// pdu.VbList.Add(setOid, setValue);
/// Dictionary<Oid, AsnType> result = snmp.Set(SnmpVersion.Ver1, pdu);
/// if( result == null ) {
/// Console.WriteLine("Request failed.");
/// } else {
/// Console.WriteLine("Success!");
/// }
/// </code>
///
/// To use SNMP version 2, change snmp.Set() method call first parameter to SnmpVersion.Ver2.
/// </example>
/// <param name="version">SNMP protocol version number. Acceptable values are SnmpVersion.Ver1 and SnmpVersion.Ver2</param>
/// <param name="pdu">Request Protocol Data Unit</param>
/// <returns>Result of the SNMP request in a dictionary format with Oid => AsnType values</returns>
public Dictionary <Oid, AsnType> Set(SnmpVersion version, Pdu pdu)
{
if (!Valid)
{
if (!_suppressExceptions)
{
throw new SnmpException("SimpleSnmp class is not valid.");
}
return(null); // class is not fully initialized.
}
// function only works on SNMP version 1 and SNMP version 2 requests
if (version != SnmpVersion.Ver1 && version != SnmpVersion.Ver2)
{
if (!_suppressExceptions)
{
throw new SnmpInvalidVersionException("SimpleSnmp support SNMP version 1 and 2 only.");
}
return(null);
}
try
{
_target = new UdpTarget(_peerIP, _peerPort, _timeout, _retry);
}
catch (Exception ex)
{
_target = null;
if (!_suppressExceptions)
{
throw ex;
}
}
if (_target == null)
{
return(null);
}
try
{
AgentParameters param = new AgentParameters(version, new OctetString(_community));
SnmpPacket result = _target.Request(pdu, param);
if (result != null)
{
if (result.Pdu.ErrorStatus == 0)
{
Dictionary <Oid, AsnType> res = new Dictionary <Oid, AsnType>();
foreach (Vb v in result.Pdu.VbList)
{
if (res.ContainsKey(v.Oid))
{
if (res[v.Oid].Type != v.Value.Type)
{
throw new SnmpException(SnmpException.OidValueTypeChanged, "OID value type changed for OID: " + v.Oid.ToString());
}
else
{
res[v.Oid] = v.Value;
}
}
else
{
res.Add(v.Oid, v.Value);
}
}
_target.Close();
_target = null;
return(res);
}
else
{
if (!_suppressExceptions)
{
throw new SnmpErrorStatusException("Agent responded with an error", result.Pdu.ErrorStatus, result.Pdu.ErrorIndex);
}
}
}
}
catch (Exception ex)
{
if (!_suppressExceptions)
{
_target.Close();
_target = null;
throw ex;
}
}
_target.Close();
_target = null;
return(null);
}
/// <summary>SNMP GET-BULK request</summary>
/// <remarks>
/// GetBulk request type is only available with SNMP v2c agents. SNMP v3 also supports the request itself
/// but that version of the protocol is not supported by SimpleSnmp.
///
/// GetBulk method will return a dictionary of Oid to value mapped values as returned form a
/// single GetBulk request to the agent. You can change how the request itself is made by changing the
/// SimpleSnmp.NonRepeaters and SimpleSnmp.MaxRepetitions values. SimpleSnmp properties are only used
/// when values in the parameter Pdu are set to 0.
/// </remarks>
/// <example>SNMP GET-BULK request:
/// <code>
/// string snmpAgent = "10.10.10.1";
/// string snmpCommunity = "private";
/// SimpleSnmp snmp = new SimpleSnmp(snmpAgent, snmpCommunity);
/// // Create a request Pdu
/// Pdu pdu = new Pdu();
/// pdu.Type = SnmpConstants.GETBULK; // type GETBULK
/// pdu.VbList.Add("1.3.6.1.2.1.1");
/// pdu.NonRepeaters = 0;
/// pdu.MaxRepetitions = 10;
/// Dictionary<Oid, AsnType> result = snmp.GetBulk(pdu);
/// if( result == null ) {
/// Console.WriteLine("Request failed.");
/// } else {
/// foreach (KeyValuePair<Oid, AsnType> entry in result)
/// {
/// Console.WriteLine("{0} = {1}: {2}", entry.Key.ToString(), SnmpConstants.GetTypeName(entry.Value.Type),
/// entry.Value.ToString());
/// }
/// }
/// </code>
/// Will return:
/// <code>
/// 1.3.6.1.2.1.1.1.0 = OctetString: "Dual core Intel notebook"
/// 1.3.6.1.2.1.1.2.0 = ObjectId: 1.3.6.1.9.233233.1.1
/// 1.3.6.1.2.1.1.3.0 = TimeTicks: 0d 0h 0m 1s 420ms
/// 1.3.6.1.2.1.1.4.0 = OctetString: "*****@*****.**"
/// 1.3.6.1.2.1.1.5.0 = OctetString: "milans-nbook"
/// 1.3.6.1.2.1.1.6.0 = OctetString: "Developer home"
/// 1.3.6.1.2.1.1.8.0 = TimeTicks: 0d 0h 0m 0s 10ms
/// </code>
/// </example>
/// <param name="pdu">Request Protocol Data Unit</param>
/// <returns>Result of the SNMP request in a dictionary format with Oid => AsnType values</returns>
public Dictionary <Oid, AsnType> GetBulk(Pdu pdu)
{
if (!Valid)
{
if (!suppressExceptions)
{
throw new SnmpException("SimpleSnmp class is not valid.");
}
return(null); // class is not fully initialized.
}
try
{
pdu.NonRepeaters = nonRepeaters;
pdu.MaxRepetitions = maxRepetitions;
target = new UdpTarget(peerIP, peerPort, timeout, retry);
}
catch (System.Exception ex)
{
target = null;
if (!suppressExceptions)
{
throw ex;
}
}
if (target == null)
{
return(null);
}
try
{
AgentParameters param = new AgentParameters(ESnmpVersion.Ver2, new OctetString(community));
SnmpPacket result = target.Request(pdu, param);
if (result != null)
{
if (result.Pdu.ErrorStatus == 0)
{
Dictionary <Oid, AsnType> res = new Dictionary <Oid, AsnType>();
foreach (Vb v in result.Pdu.VbList)
{
if (
(v.Value.Type == SnmpConstants.SmiEndOfMIBView) ||
(v.Value.Type == SnmpConstants.SmiNoSuchInstance) ||
(v.Value.Type == SnmpConstants.SmiNoSuchObject))
{
break;
}
if (res.ContainsKey(v.Oid))
{
if (res[v.Oid].Type != v.Value.Type)
{
throw new SnmpException(SnmpException.EErrorCode.OidValueTypeChanged, "OID value type changed for OID: " + v.Oid.ToString());
}
else
{
res[v.Oid] = v.Value;
}
}
else
{
res.Add(v.Oid, v.Value);
}
}
target.Close();
target = null;
return(res);
}
if (!suppressExceptions)
{
throw new SnmpErrorStatusException("Agent responded with an error", result.Pdu.ErrorStatus, result.Pdu.ErrorIndex);
}
}
}
catch (System.Exception ex)
{
if (!suppressExceptions)
{
target.Close();
target = null;
throw ex;
}
}
target.Close();
target = null;
return(null);
}
