private void ShowTable(Dictionary <Oid, AsnType> result)
{
tableViewDataGridView.Columns.Clear();
if (result == null)
{
ErrorMessageBox.Show("Request failed.");
}
else
{
var rowNumber = 0;
var prevColumnNumber = -1;
foreach (KeyValuePair <Oid, AsnType> entry in result)
{
if (entry.Value.ToString().Equals("Null"))
{
ErrorMessageBox.Show("Request failed.");
}
else
{
var tableRootOid = new Oid(oidTextBox.Text);
var currentOid = entry.Key;
var cutOid = currentOid.CutCommonRoot(tableRootOid);
var columnNumber = cutOid.LevelValue(1) - 1;
if (columnNumber == prevColumnNumber)
{
rowNumber++;
}
else
{
rowNumber = 0;
var tableRootOidLevels = tableRootOid.Levels();
tableViewDataGridView.Columns.Add(currentOid.CutAfterLevel(tableRootOidLevels + 2), currentOid.CutAfterLevel(tableRootOidLevels + 2));
}
if (tableViewDataGridView.Rows.Count <= rowNumber)
{
tableViewDataGridView.Rows.Add();
}
tableViewDataGridView.Rows[rowNumber].Cells[columnNumber].Value = entry.Value.ToString();
prevColumnNumber = columnNumber;
}
}
}
}
private void AddToMonitoredObjects(string oid)
{
try {
var timer = new Timer {
Interval = Settings.Default.MonitorInterval
};
timer.Tick += (sender, eventArgs) => OnTick(sender, eventArgs, oid);
_monitoredObjects.Add(oid, timer);
timer.Start();
}
catch (ArgumentException) {
ErrorMessageBox.Show($"Object {oid} is already observed.");
}
}
public void Listen()
{
var ipEndPoint = new IPEndPoint(IPAddress.Any, 162);
Task.Run(async() => {
var run = true;
while (run)
{
try {
using (var udpListener = new UdpClient(ipEndPoint)) {
var udpRecieveResult = await udpListener.ReceiveAsync();
var recievedData = udpRecieveResult.Buffer;
int protocolVersion = SnmpPacket.GetProtocolVersion(recievedData, recievedData.Length);
switch (protocolVersion)
{
case (int)SnmpVersion.Ver1:
var snmpV1TrapPacket = new SnmpV1TrapPacket();
snmpV1TrapPacket.decode(recievedData, recievedData.Length);
RecieveTrap(snmpV1TrapPacket);
break;
case (int)SnmpVersion.Ver2:
var snmpV2Packet = new SnmpV2Packet();
snmpV2Packet.decode(recievedData, recievedData.Length);
RecieveTrap(snmpV2Packet);
break;
case (int)SnmpVersion.Ver3:
var snmpV3Packet = new SnmpV3Packet();
snmpV3Packet.decode(recievedData, recievedData.Length);
RecieveTrap(snmpV3Packet);
break;
}
}
}
catch (SocketException) {
ErrorMessageBox.Show($"Port {ipEndPoint.Port} is already used.");
run = false;
}
catch (Exception e) {
ErrorMessageBox.Show($"{e.Message}");
}
}
});
}
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());
}
}
}
}
