| public decode ( byte berBuffer, int length ) : int | ||
| berBuffer | byte | BER encoded SNMP version 3 packet buffer |
| length | int | Buffer length |
| Результат | int | |
public override int decode(byte[] berBuffer, int length)
{
byte[] pkey = null;
byte[] akey = null;
if (_msgFlags.Authentication && _userSecurityModel.EngineId.Length > 0)
{
IAuthenticationDigest auth = Authentication.GetInstance(_userSecurityModel.Authentication);
if (auth == null)
throw new SnmpException(SnmpException.UnsupportedNoAuthPriv, "Invalid authentication protocol.");
akey = auth.PasswordToKey(_userSecurityModel.AuthenticationSecret, _userSecurityModel.EngineId);
if (_msgFlags.Privacy && _userSecurityModel.EngineId.Length > 0)
{
IPrivacyProtocol privacyProtocol = PrivacyProtocol.GetInstance(_userSecurityModel.Privacy);
if (privacyProtocol == null)
throw new SnmpException(SnmpException.UnsupportedPrivacyProtocol, "Specified privacy protocol is not supported.");
pkey = privacyProtocol.PasswordToKey(_userSecurityModel.PrivacySecret, _userSecurityModel.EngineId, auth);
}
}
return decode(berBuffer, length, akey, pkey);
}
| SnmpV3Packet::decode ( byte berBuffer, int length, byte authKey, byte privKey ) : int |
internal void AsyncResponse(AsyncRequestResult result, IPEndPoint peer, byte[] buffer, int buflen)
{
if (result != AsyncRequestResult.NoError)
{
_response(result, null);
}
else
{
if (buffer == null || buffer.Length <= 0 || buflen <= 0)
{
_response(AsyncRequestResult.NoDataReceived, null);
return;
}
// verify packet
if (_agentParameters.Version == (int)SnmpVersion.Ver1)
{
SnmpV1Packet packet = new SnmpV1Packet();
try
{
packet.decode(buffer, buflen);
}
catch (Exception ex)
{
ex.GetType();
// Console.WriteLine("Exception while decoding SNMP packet: " + ex.ToString());
_response(AsyncRequestResult.DecodeError, packet);
return;
}
_response(AsyncRequestResult.NoError, packet);
return;
}
else if (_agentParameters.Version == SnmpVersion.Ver2)
{
SnmpV2Packet packet = new SnmpV2Packet();
try
{
packet.decode(buffer, buflen);
}
catch (Exception ex)
{
ex.GetType();
// Console.WriteLine("Exception while decoding SNMP packet: " + ex.ToString());
// MutableByte b = new MutableByte(buffer, buflen);
// Console.WriteLine("Buffer length {0}", buflen);
// SnmpConstants.DumpHex(b);
_response(AsyncRequestResult.DecodeError, packet);
return;
}
_response(AsyncRequestResult.NoError, packet);
}
else if (_agentParameters.Version == SnmpVersion.Ver3)
{
SnmpV3Packet packet = new SnmpV3Packet();
SecureAgentParameters secparams = (SecureAgentParameters)_agentParameters;
secparams.InitializePacket(packet);
try {
if (secparams.HasCachedKeys)
{
packet.decode(buffer, buflen, secparams.AuthenticationKey, secparams.PrivacyKey);
}
else
{
packet.decode(buffer, buflen);
}
}
catch
{
_response(AsyncRequestResult.DecodeError, packet);
return;
}
if (!secparams.ValidateIncomingPacket(packet))
{
_response(AsyncRequestResult.AuthenticationError, packet);
}
else
{
secparams.UpdateDiscoveryValues(packet); // update time, etc. values
_response(AsyncRequestResult.NoError, packet);
}
}
}
}
