private void listenBroadcast()
{
Console.WriteLine("listen broadcast...");
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
IPEndPoint endPoint = new IPEndPoint(IPAddress.Any, Setting.Port);
socket.Bind(endPoint);
byte[] buffer = new byte[VERIFY_KEY_BUFFER_SIZE];
while (true)
{
int res = 0;
try
{
res = socket.ReceiveFrom(buffer, ref mRemote);
String msg = Encoding.Default.GetString(buffer, 0, res);
Log.v("msg:" + msg);
BroadcastMsg broadcastMsg = new BroadcastMsg(msg);
if (Verify.verifyBroadcastMsg(broadcastMsg))
{
addToPadList(broadcastMsg, ((IPEndPoint)mRemote).Address);
}
}
catch (Exception e)
{
Console.WriteLine("illegal client request! from " + mRemote.ToString());
}
}
}
public static Boolean verifyBroadcastMsg(BroadcastMsg msg)
{
if (msg.Secret == null)
return false;
if (msg.Timestamp == null)
return false;
if (!Md5.Encrypt(msg.Timestamp + Setting.BroadcastSecretKey).Equals(msg.Secret))
return false;
return true;
}
private PadInfo makePadInfo(BroadcastMsg msg, IPAddress address)
{
PadInfo info = new PadInfo(msg.DeviceId, msg.DeviceName, address, msg.Port);
return info;
}
private void addToPadList(BroadcastMsg msg, IPAddress address)
{
PadInfo info = makePadInfo(msg, address);
mPadContainer.addPad(info);
}
