private void DeviceListView_EncryptionButton_Click(object sender, RoutedEventArgs e)
{
PhysicalAddressSerializable clickMac = PhysicalAddressSerializable.Parse(((Button)sender).Tag.ToString());
Device device = Settings.SettingsData.GetDevice(clickMac);
if (device.EncryptionEnabled)
{
Settings.ConfirmationDialog dialog = new Settings.ConfirmationDialog("Remove encryption?", $"Do you want to remove encryption for communication with '{device.Name}'?", "Yes", "Cancel");
dialog.Owner = Application.Current.MainWindow;
if (dialog.ShowDialog() ?? false)
{
Settings.SettingsData.SetDeviceEncryptionPassword(clickMac, null);
}
}
else
{
EncryptionPasswordDialog dialog = new EncryptionPasswordDialog(device.Name);
dialog.Owner = Application.Current.MainWindow;
if (dialog.ShowDialog() ?? false)
{
Settings.SettingsData.SetDeviceEncryptionPassword(clickMac, dialog.Password);
}
}
}
/// <summary>
/// Creates a presence buffer with device's Mac address, username and device type.
/// </summary>
public static void GeneratePresenceBuffer(PhysicalAddressSerializable mac, out byte[] buffer, TTInstruction instruction, string name = "", DeviceType type = DeviceType.Unknown)
{
if ((int)instruction < 10 || (int)instruction > 12)
{
new Exception("Presence buffer instruction out of range: " + instruction.ToString());
}
var macBytes = mac.GetAddressBytes();
if (instruction == TTInstruction.Discovery_Bye)
{
buffer = new byte[7];
Array.Copy(macBytes, buffer, 6);
buffer[6] = (byte)instruction;
}
else
{
var deviceTypeByte = (byte)type;
var nameBytes = Encoding.UTF8.GetBytes(Properties.Settings.Default.Name);
buffer = new byte[7 + 1 + nameBytes.Length];
Array.Copy(macBytes, buffer, 6);
buffer[6] = (byte)instruction;
buffer[7] = deviceTypeByte;
Array.Copy(nameBytes, 0, buffer, 8, nameBytes.Length);
}
}
public override bool Equals(object comparand)
{
PhysicalAddressSerializable address = comparand as PhysicalAddressSerializable;
if (address == null)
{
PhysicalAddress ad = comparand as PhysicalAddress;
if (ad == null)
{
return(false);
}
else
{
address = (PhysicalAddressSerializable)ad;
}
}
if (this.address.Length != address.address.Length)
{
return(false);
}
for (int i = 0; i < address.address.Length; i++)
{
if (this.address[i] != address.address[i])
{
return(false);
}
}
return(true);
}
public Device(string name, IPAddress ipAddress, PhysicalAddressSerializable macAddress, DeviceType type)
{
this.name = name;
this.ip = ipAddress;
this.mac = macAddress;
this.type = type;
this.receiveMode = DeviceReceiveMode.Deny;
}
public Device()
{
name = null;
ip = null;
mac = null;
type = DeviceType.Unknown;
receiveMode = DeviceReceiveMode.Deny;
}
/// <summary>
/// Set this device to be online through next timeout.
/// </summary>
public static void SetOnline(PhysicalAddressSerializable mac)
{
if (!macAddresses.Contains(mac))
{
macAddresses.Add(mac);
lastPresenceTimes.Add(DateTime.UtcNow);
Settings.SettingsData.GetDevice(mac).NotifyPropertyChanged();
}
else
{
lastPresenceTimes[macAddresses.IndexOf(mac)] = DateTime.UtcNow;
}
}
/// <summary>
/// Go though all online devices and remove any, which haven't sent a presence packet in the designated time interval.
/// </summary>
public static void TimeoutDevices()
{
DateTime currentTimeUTC = DateTime.UtcNow;
for (int i = 0; i < macAddresses.Count; i++)
{
PhysicalAddressSerializable removedMac = macAddresses[i];
TimeSpan difference = currentTimeUTC.Subtract(lastPresenceTimes[i]);
if (difference.TotalMilliseconds > Settings.SettingsData.PresenceSendPeriod + Settings.SettingsData.MaxNetworkPingMs)
{
macAddresses.RemoveAt(i);
lastPresenceTimes.RemoveAt(i);
i--;
}
Settings.SettingsData.GetDevice(removedMac).NotifyPropertyChanged();
}
}
// General
/// <summary>
/// Returns true if data in buffer is in correct format, unpacks mac, instruction and data into variables.
/// </summary>
/// <param name="buffer">Data received by client</param>
/// <param name="macAddress">MAC Address of remote host</param>
/// <param name="instruction">Received TTransfer network instruction</param>
/// <param name="data">Data remaining in buffer</param>
/// <returns></returns>
public static bool UnpackBuffer(byte[] buffer, ref PhysicalAddressSerializable macAddress, ref TTInstruction instruction, ref List <byte> data)
{
List <byte> b = new List <byte>(buffer);
if (b.Count < 7 || !Enum.IsDefined(typeof(TTInstruction), instruction))
{
return(false);
}
macAddress = new PhysicalAddressSerializable(b.GetRange(0, 6).ToArray());
instruction = (TTInstruction)b[6];
data = b.GetRange(7, b.Count - 7);
return(true);
}
private void DeviceListView_Remove_Click(object sender, RoutedEventArgs e)
{
PhysicalAddressSerializable clickMac = PhysicalAddressSerializable.Parse(((Button)sender).Tag.ToString());
Settings.SettingsData.RemoveDevice(clickMac);
}
// General
private void InitializeNetworkInfo()
{
IPAddress internetIp;
using (Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, 0))
{
socket.Connect("8.8.8.8", 65530);
IPEndPoint endPoint = socket.LocalEndPoint as IPEndPoint;
internetIp = endPoint.Address;
}
// Mac - this will either select the interface based on the selected mac address or the interface which will connect to internet
MacAddress = null;
PhysicalAddress backupMac = null;
IPAddress backupIp = null;
IPAddress backupMask = null;
var nics = TTNet.GetUsableNetworkInterfaces();
foreach (NetworkInterface nic in nics)
{
var interNetwork = nic.GetIPProperties().UnicastAddresses.Where(u => u.Address.AddressFamily == AddressFamily.InterNetwork);
IPAddress interfaceIp = interNetwork.Select(u => u.Address).FirstOrDefault();
IPAddress interfaceMask = interNetwork.Select(u => u.IPv4Mask).FirstOrDefault();
if (interfaceIp == null)
{
continue;
}
PhysicalAddress interfaceMac = nic.GetPhysicalAddress();
if (Settings.SettingsData.InterfaceMac != null && Settings.SettingsData.InterfaceMac.Equals(interfaceMac))
{
MacAddress = interfaceMac;
IPAddress = interfaceIp;
IPMask = interfaceMask;
break;
}
if (interfaceIp.ToString() == internetIp.ToString())
{
backupMac = interfaceMac;
backupIp = interfaceIp;
backupMask = interfaceMask;
}
}
// If interface with selected mac doesn't exist, select the one which connect to internet
if (MacAddress == null)
{
if (backupMac != null)
{
MacAddress = backupMac;
IPAddress = internetIp;
IPMask = backupMask;
Settings.SettingsData.InterfaceMac = MacAddress;
}
else
{
throw new Exception("Could not find a usable network interface.");
}
}
// Broadcast endpoint
PresenceEndPoint = new IPEndPoint(TTNet.GetBroadcastAddress(IPAddress, IPMask), Settings.SettingsData.NetworkPresencePort);
}
/// <summary>
/// Set this device to be set offline during next timeout.
/// </summary>
public static void SetOffline(PhysicalAddressSerializable mac)
{
lastPresenceTimes[macAddresses.IndexOf(mac)] = DateTime.UtcNow.Subtract(TimeSpan.FromDays(1));
}
/// <summary>
/// Returns true if device with this Mac is online.
/// </summary>
public static bool IsOnline(PhysicalAddressSerializable mac)
{
return(macAddresses.Contains(mac));
}
