private async void DataSocket_MessageRecieved(DatagramSocket sender, DatagramSocketMessageReceivedEventArgs args)
{
try
{
if(m_mode == DiscoveryMode.Broadcast)
{
if(args.RemoteAddress.RawName == m_currentIp)
{
// This is us talking, ignore it.
return;
}
// If we got something on the port we it means a listener has arrived.
// We should broadcast now.
m_workCountDown = -10;
DoWork(0);
}
else
{
// If this is a listener we received a broadcast, try to read and
// parse it.
DataReader reader = new DataReader(args.GetDataStream());
// Wait for a new message, here we wait for enough data to represent the string size
// if we don't get all of the data, the socket was closed.
uint waitData = await reader.LoadAsync(sizeof(uint));
if (waitData != sizeof(uint))
{
// We didn't get it all, the socket is closed.
return;
}
// Get the string size
uint stringLen = reader.ReadUInt32();
// Now wait for the actual string data
uint stringWaitData = await reader.LoadAsync(stringLen);
if (stringWaitData != stringLen)
{
// We couldn't read the full string length.
return;
}
// Get the actual string
string ipAddress = reader.ReadString(stringLen);
// Do some simple validation
Regex ip = new Regex(@"\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b");
if (ip.IsMatch(ipAddress))
{
if (m_listener != null)
{
m_listener.OnClientFound(ipAddress);
}
}
}
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("Exception in UDP message received. Message: " + e.Message);
}
}