private void ReceiveCallback(IAsyncResult ar)
{
try
{
IPEndPoint remoteEndpoint = null;
byte[] receivedBytes = client.EndReceive(ar, ref remoteEndpoint);
UdpMessage resp = new UdpMessage(receivedBytes);
ProcessResponse(remoteEndpoint, resp);
if(resp.Type == UdpMessage.Types.close)
{
StopListening();
}
else
{
client.BeginReceive(new AsyncCallback(this.ReceiveCallback), null);
}
}
catch (Exception ex)
{
AddLogItem(" E", ex.Message);
}
}
private void ProcessResponse(IPEndPoint from, UdpMessage resp)
{
if (resp.Type != UdpMessage.Types.message)
{
AddLogItem(
string.Format("{0}:{1} ->", from.Address, from.Port),
resp.Text
);
}
else
{
var sender = clientCollection.FirstOrDefault(x => String.Compare(x.Id, resp.Parameters[0]) == 0);
AddLogItem(
sender != null ? string.Format("{0}:{1} ->", sender.Endpoint.Address, sender.Endpoint.Port) : " N/A ->",
resp.Text
);
}
switch (resp.Type)
{
case UdpMessage.Types.register:
clientCollection.Add(new Client(resp.Parameters[0], new IPEndPoint(from.Address, Convert.ToInt32(resp.Parameters[1]))));
break;
case UdpMessage.Types.message:
ForwardMessage(resp.Parameters[0], resp.Parameters[1]);
break;
case UdpMessage.Types.close:
break;
}
}