/// <summary>
/// Reconnects a client after an error or if it's offline. Reconnecting, instead of creating a completely new connection,
/// saves time.
/// </summary>
public async Task Reconnect()
{
try
{
this.secondTimer?.Dispose();
this.secondTimer = null;
if (this.state == MqttState.Connected)
{
await this.DISCONNECT();
}
this.DisposeClient();
}
catch (Exception)
{
// Ignore
}
finally
{
this.secondTimer = null;
this.client = null;
}
this.state = MqttState.Offline;
await this.BeginConnect();
}
/// <summary>
/// Reconnects a client after an error or if it's offline. Reconnecting, instead of creating a completely new connection,
/// saves time.
/// </summary>
public void Reconnect()
{
try
{
if (this.secondTimer != null)
{
this.secondTimer.Dispose();
}
if (this.state == MqttState.Connected)
{
this.DISCONNECT();
}
this.DisposeClient();
}
catch (Exception)
{
// Ignore
}
finally
{
this.secondTimer = null;
this.client = null;
}
this.state = MqttState.Offline;
Task.Run(this.BeginConnect);
}
private async void MqttClient_OnStateChanged(object Sender, MqttState NewState)
{
try
{
switch (NewState)
{
case MqttState.Connected:
this.connectionOk = true;
await this.node.RemoveErrorAsync("Offline");
await this.node.RemoveErrorAsync("Error");
this.mqttClient.SUBSCRIBE("#", MqttQualityOfService.AtLeastOnce);
break;
case MqttState.Error:
await this.node.LogErrorAsync("Error", "Connection to broker failed.");
this.Reconnect();
break;
case MqttState.Offline:
await this.node.LogErrorAsync("Offline", "Connection is closed.");
this.Reconnect();
break;
}
}
catch (Exception ex)
{
Log.Critical(ex);
}
}
private Task Client_OnStateChanged(object Sender, MqttState NewState)
{
switch (NewState)
{
case MqttState.Connected:
this.isOnline = true;
if (string.IsNullOrEmpty(this.credentials.ObjectId))
{
Database.Insert(this.credentials);
}
this.client.SUBSCRIBE(this.subscriptions);
this.connected?.TrySetResult(true);
break;
case MqttState.Error:
case MqttState.Offline:
this.isOnline = false;
this.connected?.TrySetResult(false);
break;
}
this.Model.ExternalEvent(this, "OnStateChanged",
new KeyValuePair <string, object>("NewState", NewState),
new KeyValuePair <string, object>("Client", this.client));
return(Task.CompletedTask);
}
/// <summary>
/// Manages an MQTT connection. Implements MQTT v3.1.1, as defined in
/// http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html
/// </summary>
/// <param name="Host">Host name or IP address of MQTT server.</param>
/// <param name="Port">Port to connect to.</param>
/// <param name="Tls">If TLS is used to encrypt communication.</param>
/// <param name="UserName">User Name</param>
/// <param name="Password">Password</param>
/// <param name="WillTopic">Topic to publish the last will and testament, in case the connection drops unexpectedly.</param>
/// <param name="WillQoS">Quality of Service of last will and testament, in case the connection drops unexpectedly.</param>
/// <param name="WillRetain">If last will and testament should be retained, in case the connection drops unexpectedly.</param>
/// <param name="WillData">Data of last will and testament, in case the connection drops unexpectedly.</param>
/// <param name="Sniffers">Sniffers to use.</param>
public MqttClient(string Host, int Port, bool Tls, string UserName, string Password, string WillTopic,
MqttQualityOfService WillQoS, bool WillRetain, byte[] WillData, params ISniffer[] Sniffers)
: base(Sniffers)
{
this.host = Host;
this.port = Port;
this.tls = Tls;
this.userName = UserName;
this.password = Password;
#if !WINDOWS_UWP
this.clientCertificate = null;
#endif
this.state = MqttState.Offline;
this.will = !string.IsNullOrEmpty(WillTopic) && WillData != null;
this.willTopic = WillTopic;
this.willQoS = WillQoS;
this.willRetain = WillRetain;
this.willData = WillData;
if (this.will && this.willData.Length > 65535)
{
throw new ArgumentException("Will data too large.", nameof(WillData));
}
Task.Run(() => this.BeginConnect());
}
private void Mqtt_OnStateChanged(object Sender, MqttState NewState)
{
this.Dispatcher.Invoke(new Action(() => this.ConnectionState.Content = NewState.ToString()));
if (NewState == MqttState.Connected)
{
this.Dispatcher.Invoke(new Action(() => this.mqtt.SUBSCRIBE(this.Topic.Text)));
}
}
/// <summary>
/// Manages an MQTT connection. Implements MQTT v3.1.1, as defined in
/// http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html
/// </summary>
/// <param name="Host">Host name or IP address of MQTT server.</param>
/// <param name="Port">Port to connect to.</param>
/// <param name="Tls">If TLS is used to encrypt communication.</param>
/// <param name="UserName">User Name</param>
/// <param name="Password">Password</param>
public MqttConnection(string Host, int Port, bool Tls, string UserName, string Password)
{
this.host = Host;
this.port = Port;
this.tls = Tls;
this.userName = UserName;
this.password = Password;
this.state = MqttState.Connecting;
this.client = new TcpClient();
this.client.BeginConnect(Host, Port, this.ConnectCallback, null);
}
/// <summary>
/// Manages an MQTT connection. Implements MQTT v3.1.1, as defined in
/// http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html
/// </summary>
/// <param name="Host">Host name or IP address of MQTT server.</param>
/// <param name="Port">Port to connect to.</param>
/// <param name="Tls">If TLS is used to encrypt communication.</param>
/// <param name="UserName">User Name</param>
/// <param name="Password">Password</param>
/// <param name="Sniffers">Sniffers to use.</param>
public MqttClient(string Host, int Port, bool Tls, string UserName, string Password, params ISniffer[] Sniffers)
: base(Sniffers)
{
this.host = Host;
this.port = Port;
this.tls = Tls;
this.userName = UserName;
this.password = Password;
this.clientCertificate = null;
this.state = MqttState.Offline;
Task.Run(() => this.BeginConnect());
}
public MqttClient(string Host, int Port, X509Certificate ClientCertificate, params ISniffer[] Sniffers)
#endif
: base(Sniffers)
{
this.host = Host;
this.port = Port;
this.tls = true;
this.userName = string.Empty;
this.password = string.Empty;
this.clientCertificate = ClientCertificate;
this.state = MqttState.Offline;
Task.Run(() => this.BeginConnect());
}
private async void RaiseOnStateChanged(MqttState State)
{
StateChangedEventHandler h = this.OnStateChanged;
if (h != null)
{
try
{
await h(this, State);
}
catch (Exception ex)
{
this.Exception(ex);
}
}
}
private void CheckOnline(object _)
{
if (this.mqttClient != null)
{
try
{
MqttState State = this.mqttClient.State;
if (State == MqttState.Offline || State == MqttState.Error)
{
this.mqttClient.Reconnect();
}
}
finally
{
this.nextCheck = Scheduler.Add(DateTime.Now.AddMinutes(1), this.CheckOnline, null);
}
}
}
private async Task DISCONNECT()
{
BinaryOutput Packet = new BinaryOutput();
Packet.WriteByte((byte)MqttControlPacketType.DISCONNECT << 4);
Packet.WriteUInt(2);
byte[] PacketData = Packet.GetPacket();
TaskCompletionSource <bool> Done = new TaskCompletionSource <bool>();
await this.Write(PacketData, 0, (sender, e) =>
{
this.State = MqttState.Offline;
Done.TrySetResult(true);
});
await Task.WhenAny(Done.Task, Task.Delay(1000));
}
private void DISCONNECT()
{
BinaryOutput Packet = new BinaryOutput();
Packet.WriteByte((byte)MqttControlPacketType.DISCONNECT << 4);
Packet.WriteUInt(2);
byte[] PacketData = Packet.GetPacket();
ManualResetEvent Done = new ManualResetEvent(false);
this.BeginWrite(PacketData, 0, (sender, e) =>
{
this.State = MqttState.Offline;
Done.Set();
});
Done.WaitOne(1000);
}
private void MqttConnection_OnStateChanged(object Sender, MqttState NewState)
{
if (NewState == MqttState.Connected)
{
this.mqttConnection.SUBSCRIBE(this.mqttNegotiationTopic);
BinaryOutput Output = new BinaryOutput();
Output.WriteByte(0);
Output.WriteString(this.applicationName);
this.localPlayer.SetEndpoints(this.p2pNetwork.ExternalEndpoint, this.p2pNetwork.LocalEndpoint);
this.Serialize(this.localPlayer, Output);
this.mqttConnection.PUBLISH(this.mqttNegotiationTopic, MqttQualityOfService.AtLeastOnce, false, Output);
#if LineListener
Console.Out.WriteLine("Tx: HELLO(" + this.localPlayer.ToString() + ")");
#endif
}
}
private void EndDisconnect(IAsyncResult ar)
{
ManualResetEvent Done = (ManualResetEvent)ar.AsyncState;
try
{
if (!(this.stream is null))
{
this.stream.EndWrite(ar);
}
this.State = MqttState.Offline;
}
catch (Exception ex)
{
this.ConnectionError(ex);
}
finally
{
Done.Set();
}
}
private async void CheckOnline(object _)
{
try
{
if (this.mqttClient != null)
{
MqttState State = this.mqttClient.State;
if (State == MqttState.Offline || State == MqttState.Error)
{
await this.mqttClient.Reconnect();
}
}
}
catch (Exception ex)
{
Log.Critical(ex);
}
finally
{
this.nextCheck = Scheduler.Add(DateTime.Now.AddMinutes(1), this.CheckOnline, null);
}
}
private void Client_OnStateChanged(object Sender, MqttState NewState)
{
switch (NewState)
{
case MqttState.Connected:
uint i;
lock (this.synchObj)
{
i = this.eventsLost;
this.eventsLost = 0;
this.connected = true;
}
if (i > 0)
{
Log.Notice(i.ToString() + " events lost while MQTT connection was down.",
this.ObjectID, string.Empty, "EventsLost", new KeyValuePair <string, object>("Nr", i));
}
break;
case MqttState.Offline:
bool ImmediateReconnect;
lock (this.synchObj)
{
ImmediateReconnect = this.connected;
this.connected = false;
}
if (ImmediateReconnect && this.timer != null)
{
this.client.Reconnect();
}
break;
}
}
private void EndDisconnect(IAsyncResult ar)
{
ManualResetEvent Done = (ManualResetEvent)ar.AsyncState;
try
{
if (this.stream != null)
this.stream.EndWrite(ar);
this.State = MqttState.Offline;
}
catch (Exception ex)
{
this.ConnectionError(ex);
}
finally
{
Done.Set();
}
}
private void mqttConnection_OnStateChanged(MqttConnection Sender, MqttState NewState)
{
if (NewState == MqttState.Connected)
{
this.mqttConnection.SUBSCRIBE(this.mqttNegotiationTopic);
BinaryOutput Output = new BinaryOutput();
Output.WriteByte(0);
Output.WriteString(this.applicationName);
this.localPlayer.SetEndpoints(this.p2pNetwork.ExternalEndpoint, this.p2pNetwork.LocalEndpoint);
this.Serialize(this.localPlayer, Output);
this.mqttConnection.PUBLISH(this.mqttNegotiationTopic, MqttQualityOfService.AtLeastOne, false, Output);
#if LineListener
Console.Out.WriteLine("Tx: HELLO(" + this.localPlayer.ToString() + ")");
#endif
}
}
/// <summary>
/// Manages an MQTT connection. Implements MQTT v3.1.1, as defined in
/// http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html
/// </summary>
/// <param name="Host">Host name or IP address of MQTT server.</param>
/// <param name="Port">Port to connect to.</param>
/// <param name="Tls">If TLS is used to encrypt communication.</param>
/// <param name="UserName">User Name</param>
/// <param name="Password">Password</param>
public MqttConnection(string Host, int Port, bool Tls, string UserName, string Password)
{
this.host = Host;
this.port = Port;
this.tls = Tls;
this.userName = UserName;
this.password = Password;
this.state = MqttState.Connecting;
this.client = new TcpClient();
this.client.BeginConnect(Host, Port, this.ConnectCallback, null);
}