/// <summary>
/// call back handler for UDP calls
/// </summary>
/// <param name="obj">response object</param>
/// <param name="remoteIpAddress">from IP address</param>
private static void callback(object obj, string remoteIpAddress)
{
var responseBytes = obj as byte[];
if (responseBytes.Length < 3)
{
string response = Encoding.UTF8.GetString(responseBytes, 0, responseBytes.Length);
if (response == "C")
{
if (ConnectionLifeCycle.CurrentConnectionState == ConnectionState.Connected)
{
// ignore this message
// already connected
RejectCommand(remoteIpAddress);
}
else
{
ConnectionLifeCycle.CurrentConnectionState = ConnectionState.Connected;
ConnectionLifeCycle.CurrentConnected = remoteIpAddress;
CallBackForView?.Invoke(ConnectionLifeCycle.CurrentConnectionState);
ConnectResponseCommand(remoteIpAddress);
audioHandler.StartRecordingAsync(SendAudioCallback);
}
}
else if (response == "CR")
{
ConnectionLifeCycle.CurrentConnectionState = ConnectionState.Connected;
ConnectionLifeCycle.CurrentConnected = remoteIpAddress;
CallBackForView?.Invoke(ConnectionLifeCycle.CurrentConnectionState);
// connected successfully
audioHandler.StartRecordingAsync(SendAudioCallback);
}
else if (response == "D")
{
audioHandler.StopRecording();
ConnectionLifeCycle.CurrentConnectionState = ConnectionState.NotConnected;
ConnectionLifeCycle.CurrentConnected = string.Empty;
MessagingCenter.Send(new DisconnectMessage(), "Disconnect");
//CallBackForView?.Invoke(ConnectionLifeCycle.CurrentConnectionState);
// disconnected successfully
}
else if (response == "R")
{
ConnectionLifeCycle.CurrentConnectionState = ConnectionState.NotConnected;
ConnectionLifeCycle.CurrentConnected = string.Empty;
}
else if (response == "UR")
{
string name = AppStorage.Name;
// send this name back to IP Address requested
if (name.Length < 3)
{
name = string.Concat(name, "0000".Substring(0, 3 - name.Length));
}
NameResponseCommand(remoteIpAddress, name);
}
}
// request name of the client and validating connection
else if (responseBytes.Length < 20)
{
string response = Encoding.UTF8.GetString(responseBytes, 0, responseBytes.Length);
if (response.StartsWith("NR-"))
{
string remoteName = response.Split(new char[] { '-' })[1];
var ipaddressService = DependencyService.Get <IIPAddressManager>();
string ipaddress = ipaddressService.GetIPAddress();
if (remoteIpAddress != ipaddress)
{
CallBackForUserDetails?.Invoke(new User()
{
IPAddress = remoteIpAddress, Name = remoteName
});
}
}
}
else // voice message
{
audioHandler.PlayAudio(responseBytes);
}
}
