public bool Listen(string RemoteMachine)
{
bool Success = false; // init success to failure
try
{
SNMPAPI_STATUS Result = new SNMPAPI_STATUS(); // set up a result item
// this is our call-back function
SnmpAPI.SnmpCallback SnmpCB1 = new SnmpAPI.SnmpCallback(OnSnmpMessage);
// get the local and remote ip addresses
this.LocalAddr = Dns.GetHostEntry(Dns.GetHostName()).AddressList[0].ToString();
this.RemoteAddr = Dns.GetHostEntry(RemoteMachine).AddressList[0].ToString();
// initialize the snmp api system
Result = SnmpAPI.SnmpStartup(out major, out minor, out level, out translate, out retran);
if (Result != SNMPAPI_STATUS.SNMPAPI_SUCCESS)
{
throw new Exception("SNMP Initialization Error");
}
// create the session
Session = SnmpAPI.SnmpCreateSession(IntPtr.Zero, 0, SnmpCB1, IntPtr.Zero);
if (Result == SNMPAPI_STATUS.SNMPAPI_FAILURE)
{
throw new Exception("SNMP Create Session Error");
}
Result = SnmpRegister(Session, System.IntPtr.Zero, System.IntPtr.Zero, System.IntPtr.Zero, System.IntPtr.Zero, (int)SNMPAPI_STATE.SNMPAPI_ON);
if (Result != SNMPAPI_STATUS.SNMPAPI_SUCCESS)
{
throw new Exception("SNMP Initialization Error");
}
IntPtr VbL1 = new IntPtr(); // pointer to variable bindings list
SMIOID[] OID = new SMIOID[1]; // an array of oids
SMIVALUE[] Val = new SMIVALUE[1]; // an array of values
// create entities for the source and destination addresses
IntPtr Source = SnmpAPI.SnmpStrToEntity(Session, LocalAddr);
IntPtr Destin = SnmpAPI.SnmpStrToEntity(Session, RemoteAddr);
VbL1 = SnmpAPI.SnmpCreateVbl(Session, ref OID[0], ref Val[0]);
VARIABLE_ITEM VariableListItem = new VARIABLE_ITEM();
VariableListItem.Entity = ".1";
VariableListItem.Type = VARIABLE_TYPE.VARIABLE_TYPE_OCTECT;
VariableListItem.Value = "GetAlarmDescription(AlarmCode)";
AddVariableListItem(VariableListItem);
IntPtr Pdu = SnmpAPI.SnmpCreatePdu(Session, (int)SNMPAPI_PDU.SNMP_PDU_GETBULK, Int16.MinValue, Int16.MinValue, Int16.MinValue, VbL1);
GCHandle[] PinnedArray = new GCHandle[1]; // an array of pinned memory
SMIOCTETS DestOct = new SMIOCTETS(); // the destination octect
// set the destination octet (we only need to set the first one, the rest will flow accordingly)
DestOct.size = (uint)(VariableListItem.Value.Length);
//DestOct.octets = PinnedArray[0].AddrOfPinnedObject();
IntPtr Context = SnmpAPI.SnmpStrToContext(Session, ref DestOct);
// set the port to 162
Result = SnmpAPI.SnmpSetPort(Destin, 162);
while (!Success)
{
Result = SnmpAPI.SnmpRecvMsg(Session, out Source, out Destin, out Context, out Pdu);
if (Result == SNMPAPI_STATUS.SNMPAPI_SUCCESS)
//throw new Exception("SNMP Initialization Error");
{
int teste1;
int teste0;
int teste3; int teste4;
IntPtr vlb;
Result = SnmpAPI.SnmpGetPduData(Pdu, out teste0, out teste1, out teste3, out teste4, out vlb);
//VARIABLE_BINDING_LIST teste11 = teste;
Success = true;
break;
}
Thread.Sleep(100);
}
}
catch (Exception Err)
{
ErrMess = Err.Message;
}
return(Success);
}