/// <summary>
/// Sends UDP packet.
/// </summary>
/// <param name="packet">Packet to send.</param>
/// <param name="remoteEndPoint">Address of destination for packet. It can be broadcast address.</param>
/// <exception cref="System.ArgumentNullException">Packet is null. -or- Remote IP end point is null.</exception>
public static void Send(TinyPacket packet, IPEndPoint remoteEndPoint)
{
if (packet == null)
{
throw new ArgumentNullException("packet", "Packet is null.");
}
if (remoteEndPoint == null)
{
throw new ArgumentNullException("remoteEndPoint", "Remote IP end point is null.");
}
using (Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp)) {
if (remoteEndPoint.Address == IPAddress.Broadcast)
{
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, true);
}
if (IsRunningOnMono == false)
{
socket.SetSocketOption(SocketOptionLevel.Udp, SocketOptionName.NoChecksum, false);
}
socket.SendTo(packet.GetBytes(), remoteEndPoint);
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "TinyMessage [{0} -> {1}]", packet, remoteEndPoint));
}
}
/// <summary>
/// Sends one UDP packet and expects another in return.
/// Returns null if respose is not received within receiveTimeout.
/// </summary>
/// <param name="packet">Packet to send.</param>
/// <param name="remoteEndPoint">Address of destination for packet. It can be broadcast address.</param>
/// <param name="receiveTimeout">Number of milliseconds to wait for receive operation to be done. If number is zero, infinite timeout will be used.</param>
/// <exception cref="System.ArgumentNullException">Packet is null. -or- Remote IP end point is null.</exception>
public static TinyPacket SendAndReceive(TinyPacket packet, IPEndPoint remoteEndPoint, Int32 receiveTimeout)
{
if (packet == null)
{
throw new ArgumentNullException("packet", "Packet is null.");
}
if (remoteEndPoint == null)
{
throw new ArgumentNullException("remoteEndPoint", "Remote IP end point is null.");
}
using (Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp)) {
socket.ReceiveTimeout = receiveTimeout;
if (remoteEndPoint.Address == IPAddress.Broadcast)
{
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, true);
}
if (IsRunningOnMono == false)
{
socket.SetSocketOption(SocketOptionLevel.Udp, SocketOptionName.NoChecksum, false);
}
var bytesOut = packet.GetBytes();
socket.SendTo(bytesOut, bytesOut.Length, SocketFlags.None, remoteEndPoint);
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "TinyMessage [{0} -> {1}]", packet, remoteEndPoint));
EndPoint remoteEndPointIn = (EndPoint)(new IPEndPoint(IPAddress.Any, 0));
var bytesIn = new byte[65536];
try {
int len = socket.ReceiveFrom(bytesIn, ref remoteEndPointIn);
var packetIn = Medo.Net.TinyPacket.Parse(bytesIn, 0, len);
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "TinyMessage [{0} <- {1}]", packetIn, remoteEndPointIn));
return(packetIn);
} catch (SocketException) {
return(null);
}
}
}