} // Ping and get CPU loop reads hosts.txt and localhosts.txt
public static String PingHost(string host)
{
//Returned Message
String Message = "Host is online \n";
//IPAddress instance for holding the returned host
IPAddress address = GetIpFromHost(ref host);
//set the ping options, TTL 128
PingOptions pingOptions = new PingOptions(128, true);
//create a new ping instance
Ping ping = new Ping();
//32 byte buffer (create empty)
byte[] buffer = new byte[32];
// amount of times the host is pinged
int pings = 4;
//first make sure we actually have an internet connection
if (HasConnection())
{
errorCount = 0;
avgReplyTime = 0;
//here we will ping the host 4 times (standard)
for (int i = 0; i < pings; i++)
{
try
{
//send the ping 4 times to the host and record the returned data.
//The Send() method expects 4 items:
//1) The IPAddress we are pinging
//2) The timeout value
//3) A buffer (our byte array)
//4) PingOptions
PingReply pingReply = ping.Send(address, 1000, buffer, pingOptions);
//make sure we dont have a null reply
if ((pingReply != null))
{
switch (pingReply.Status)
{
// Ping reply
case IPStatus.Success:
//Output.LogAppend(string.Format("Reply from {0}: bytes={1} time={2}ms TTL={3} \n", pingReply.Address, pingReply.Buffer.Length, pingReply.RoundtripTime, pingReply.Options.Ttl), Color.White);
avgReplyTime += pingReply.RoundtripTime;
break;
// Ping timed out
case IPStatus.TimedOut:
Message = string.Format("Error: Connection to the host: {0} [{1}] has timed out...", pingReply.Address, host);
//Output.WriteLine(Message, Color.OrangeRed);
errorCount++;
break;
// Ping failed
default:
Message = string.Format("Error: Ping failed: {0}", pingReply.Status.ToString());
//Output.WriteLine(Message, Color.OrangeRed);
errorCount++;
break;
}
}
else
{
Message = "Error: Connection failed...";
errorCount++;
}
}
catch (ArgumentNullException) // IP address was not set from hostname
{
Message = "Error: Remote host was not found";
errorCount++;
}
catch (NullReferenceException) // No host exists
{
Message = "Error: Remote host was not found";
errorCount++;
}
catch (Exception ex) // Any other unforseen scenarios
{
Message = "Unexpected error: " + ex.Message;
errorCount++;
}
}
}
else
{
Message = "Error: No Internet connection found..."; // HasConnection() returned false
}
avgReplyTime = avgReplyTime / pings; // Calculate average ping time in miliseconds
Output.WriteLine("Average response time: " + avgReplyTime + "ms", Color.LightBlue);
if (Message.Contains("Error")) // Check if Message has error to determine text colour
{
Output.WriteLine(Message, Color.OrangeRed); // Red text error
}
else
{
Output.WriteLine(Message, Color.LightGreen); // Green text success
}
return(Message);
}