private static void LogPingResult(PingResult dnsResult, PingResult tcpResult)
{
//Submit metrics to AppInsights for outcome (success=1 / failure=0) and response time for Dns lookup and Tcp port ping
var telemetry = new TelemetryClient();
telemetry.TrackMetric("NetDnsHealth_" + dnsResult.EndPoint.Replace(":", "_"), dnsResult.IsSuccess);
telemetry.TrackMetric("NetDnsTime_" + dnsResult.EndPoint.Replace(":", "_"), dnsResult.Value);
telemetry.TrackMetric("NetTcpHealth_" + tcpResult.EndPoint.Replace(":", " "), tcpResult.IsSuccess);
telemetry.TrackMetric("NetTcpTime_" + tcpResult.EndPoint.Replace(":", "_"), tcpResult.Value);
}
private void RunPingTarget(string DestinationHost, int port)
{
Stopwatch timeKeeper = new Stopwatch();
IPAddress lastKnownAddress = null;
IPAddress resolvedAddress = null;
bool isDestinationAnIpAddress = false;
DateTime TimeStamp = DateTime.UtcNow;
int dnsResult = 0;
long dnsDuration = 0;
int tcpResult = 0;
long tcpDuration = 0;
isDestinationAnIpAddress = IPAddress.TryParse(DestinationHost, out lastKnownAddress);
// DNS lookup
if (isDestinationAnIpAddress)
{
dnsResult = 1;
dnsDuration = 0;
}
else
{
TimeStamp = DateTime.UtcNow;
timeKeeper.Start();
resolvedAddress = null;
try
{
foreach (IPAddress Address in Dns.GetHostEntry(DestinationHost).AddressList)
{
// Check if it is v4
if (Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
resolvedAddress = Address;
}
}
if (resolvedAddress != null)
{
lastKnownAddress = resolvedAddress;
}
dnsResult = 1;
}
catch
{
dnsResult = 0;
dnsDuration = 0;
}
timeKeeper.Stop();
dnsDuration = timeKeeper.ElapsedMilliseconds;
timeKeeper.Reset();
}
// TCP Lookup
timeKeeper.Start();
try
{
using (Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp))
{
// Connect to configured TCP port
var asyncResult = s.BeginConnect(new IPEndPoint(lastKnownAddress, port), (result) => { return; }, null);
try
{
asyncResult.AsyncWaitHandle.WaitOne(TimeSpan.FromSeconds(5));
if (!s.Connected)
{
tcpResult = 0;
tcpDuration = 0;
}
else
{
tcpResult = 1;
}
}
catch (Exception ex)
{
LogException(ex);
tcpResult = 0;
tcpDuration = 0;
}
finally
{
if (s.Connected)
{
s.Disconnect(true);
}
}
}
}
catch (Exception exception)
{
LogException(exception);
tcpResult = 0;
tcpDuration = 0;
}
timeKeeper.Stop();
tcpDuration = timeKeeper.ElapsedMilliseconds;
timeKeeper.Reset();
/* Populate DNSLookup Result */
PingResult pDnsResult = new PingResult();
pDnsResult.EndPoint = DestinationHost + "_" + port.ToString();
pDnsResult.IsSuccess = dnsResult;
pDnsResult.Value = dnsDuration;
/* Populate TCPLookup Result */
PingResult pTcpResult = new PingResult();
pTcpResult.EndPoint = DestinationHost + "_" + port.ToString();
pTcpResult.IsSuccess = tcpResult;
pTcpResult.Value = tcpDuration;
/* Push data to Application Insights */
LogPingResult(pDnsResult, pTcpResult);
}
private void RunPingTarget(string DestinationHost, int port)
{
Stopwatch timeKeeper = new Stopwatch();
IPAddress lastKnownAddress = null;
IPAddress resolvedAddress = null;
bool isDestinationAnIpAddress = false;
DateTime TimeStamp = DateTime.UtcNow;
int dnsResult = 0;
long dnsDuration = 0;
int tcpResult = 0;
long tcpDuration = 0;
isDestinationAnIpAddress = IPAddress.TryParse(DestinationHost, out lastKnownAddress);
// DNS lookup
if (isDestinationAnIpAddress)
{
dnsResult = 1;
dnsDuration = 0;
}
else
{
TimeStamp = DateTime.UtcNow;
timeKeeper.Start();
resolvedAddress = null;
try
{
foreach (IPAddress Address in Dns.GetHostEntry(DestinationHost).AddressList)
{
// Check if it is v4
if (Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
resolvedAddress = Address;
}
}
if (resolvedAddress != null)
{
lastKnownAddress = resolvedAddress;
}
dnsResult = 1;
}
catch
{
dnsResult = 0;
dnsDuration = 0;
}
timeKeeper.Stop();
dnsDuration = timeKeeper.ElapsedMilliseconds;
timeKeeper.Reset();
}
// TCP Lookup
timeKeeper.Start();
try
{
using (Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp))
{
// Connect to configured TCP port
var asyncResult = s.BeginConnect(new IPEndPoint(lastKnownAddress, port), (result) => { return; }, null);
try
{
asyncResult.AsyncWaitHandle.WaitOne(TimeSpan.FromSeconds(5));
if (!s.Connected)
{
tcpResult = 0;
tcpDuration = 0;
}
else
{
tcpResult = 1;
}
}
catch (Exception ex)
{
LogException(ex);
tcpResult = 0;
tcpDuration = 0;
}
finally
{
if (s.Connected)
{
s.Disconnect(true);
}
}
}
}
catch (Exception exception)
{
LogException(exception);
tcpResult = 0;
tcpDuration = 0;
}
timeKeeper.Stop();
tcpDuration = timeKeeper.ElapsedMilliseconds;
timeKeeper.Reset();
/* Populate DNSLookup Result */
PingResult pDnsResult = new PingResult();
pDnsResult.EndPoint = DestinationHost + "_" + port.ToString();
pDnsResult.IsSuccess = dnsResult;
pDnsResult.Value = dnsDuration;
/* Populate TCPLookup Result */
PingResult pTcpResult = new PingResult();
pTcpResult.EndPoint = DestinationHost + "_" + port.ToString();
pTcpResult.IsSuccess = tcpResult;
pTcpResult.Value = tcpDuration;
/* Push data to Application Insights */
LogPingResult(pDnsResult, pTcpResult);
}
private static void LogPingResult(PingResult dnsResult, PingResult tcpResult)
{
//Submit metrics to AppInsights for outcome (success=1 / failure=0) and response time for Dns lookup and Tcp port ping
var telemetry = new TelemetryClient();
telemetry.TrackMetric("NetDnsHealth_" + dnsResult.EndPoint.Replace(":", "_") ,dnsResult.IsSuccess);
telemetry.TrackMetric("NetDnsTime_" + dnsResult.EndPoint.Replace(":", "_") ,dnsResult.Value);
telemetry.TrackMetric("NetTcpHealth_" + tcpResult.EndPoint.Replace(":", " ") ,tcpResult.IsSuccess);
telemetry.TrackMetric("NetTcpTime_" + tcpResult.EndPoint.Replace(":", "_") ,tcpResult.Value);
}