/// <summary>
/// Attempts to ping a host.
/// </summary>
/// <param name="serverEndPoint">EndPoint to ping</param>
/// <param name="pingCount">Ping count</param>
/// <returns>Ping results</returns>
public PingResponse PingHost(IPEndPoint serverEndPoint, int pingCount)
{
cancel = false;
PingResponse response = new PingResponse();
try
{
//Initialize a Socket of the Type ICMP
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.Icmp);
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendTimeout, this.pingTimeout);
// Set the receiving endpoint to the client machine
IPHostEntry clientHostEntry = System.Net.Dns.GetHostByName(System.Net.Dns.GetHostName());
EndPoint clientEndPoint = (new IPEndPoint(clientHostEntry.AddressList[0], 0));
//Create icmp packet
IcmpPacket packet = new IcmpPacket();
// Convert icmp packet to byte array to send over socket
byte[] sendBuffer = packet.ToByteArray();
if (sendBuffer == null)
{
OnPingError(PingResponseType.InternalError, "Could not copy ICMP packet to byte array");
response.PingResult = PingResponseType.InternalError;
response.ErrorMessage = "Could not copy ICMP packet to byte array";
}
else
{
response = SendPackets(socket, clientEndPoint, serverEndPoint, sendBuffer, pingCount);
}
}
catch (Exception ex)
{
OnPingError(PingResponseType.InternalError, ex.Message);
response.PingResult = PingResponseType.InternalError;
response.ErrorMessage = ex.Message;
}
return(response);
}
/// <summary>
/// Attempts to ping a host.
/// </summary>
/// <param name="hostname">Host to ping</param>
/// <param name="pingCount">Ping count</param>
/// <returns>Ping results</returns>
public PingResponse PingHost(string hostname, int pingCount)
{
IPHostEntry host = System.Net.Dns.GetHostEntry(hostname);//NetworkUtilities.ResolveHost(hostname);
if (host == null)
{
OnPingError(PingResponseType.CouldNotResolveHost, "Could not resolve the host '" + hostname + "'");
PingResponse response = new PingResponse();
response.PingResult = PingResponseType.CouldNotResolveHost;
response.ErrorMessage = "Could not resolve the host '" + hostname + "'";
return(response);
}
else
{
return(PingHost(new IPEndPoint(host.AddressList[0], 0), pingCount));
}
}
/// <summary>
/// Attempts to ping a host.
/// </summary>
/// <param name="serverAddress">IPAddress to ping</param>
/// <param name="pingCount">Ping count</param>
/// <returns>Ping results</returns>
public PingResponse PingHost(IPAddress serverAddress, int pingCount)
{
PingResponse response = null;
try
{
// Convert the server IPAddress to an IPEndPoint
response = PingHost(new IPEndPoint(serverAddress, 0), pingCount);
}
catch (Exception ex)
{
OnPingError(PingResponseType.InternalError, ex.Message);
response = new PingResponse();
response.PingResult = PingResponseType.InternalError;
response.ErrorMessage = ex.Message;
}
return(response);
}
public PingCompletedEventArgs(PingResponse pingResponse, DateTime endDateTime)
{
this.pingResponse = pingResponse;
this.endDateTime = endDateTime;
}
private PingResponse SendPackets(Socket socket, EndPoint client, EndPoint server, byte[] sendBuffer, int pingCount)
{
//Initialize PingResponse object
PingResponse response = new PingResponse(pingCount);
PingResponseType result = PingResponseType.Ok;
byte[] receiveBuffer = new Byte[256];
int byteCount = 0;
int start = 0;
int stop = 0;
response.PacketsReceived = 0;
response.PacketsSent = 0;
response.ServerEndPoint = (IPEndPoint)server;
response.ClientEndPoint = (IPEndPoint)client;
try
{
OnPingStarted((IPEndPoint)server, IcmpPacket.ICMP_PACKET_SIZE);
for (int i = 0; i < pingCount; i++)
{
if (cancel)
{
response.PingResult = PingResponseType.Canceled;
break;
}
// Initialize the buffers. The receive buffer is the size of the
// ICMP header plus the IP header (20 bytes)
receiveBuffer = new Byte[256];
byteCount = 0;
response.PacketsSent++;
try
{
// Start timing
start = Environment.TickCount;
//send the Packet over the socket
byteCount = socket.SendTo(sendBuffer, IcmpPacket.ICMP_PACKET_SIZE, SocketFlags.None, server);
if (byteCount == SOCKET_ERROR)
{
result = PingResponseType.ConnectionError;
response.ResponseTimes[i] = Constants.InvalidInt;
}
else
{
//ReceiveFrom will block while waiting for data
byteCount = socket.ReceiveFrom(receiveBuffer, 256, SocketFlags.None, ref client);
// stop timing
stop = System.Environment.TickCount;
if (byteCount == SOCKET_ERROR)
{
result = PingResponseType.ConnectionError;
response.ResponseTimes[i] = Constants.InvalidInt;
}
else if ((stop - start) > pingTimeout)
{
result = PingResponseType.RequestTimedOut;
response.ResponseTimes[i] = Constants.InvalidInt;
}
else if (byteCount > 0)
{
//Record time
response.ResponseTimes[i] = stop - start;
response.PacketsReceived++;
}
}
OnPingResponse(((IPEndPoint)server).Address, result, response.ResponseTimes[i], byteCount, ref cancel);
}
catch (Exception ex)
{
OnPingError(PingResponseType.InternalError, ex.Message);
}
}
}
finally
{
//close the socket
socket.Close();
OnPingCompleted(response);
}
response.PingResult = result;
return(response);
}