void Client_MqttMsgPublishReceived(object sender, MqttMsgPublishEventArgs e)
{
MqttClient client = (MqttClient)sender;
if (!mqttBridge.OnPublish(client, e)) return;
// create PUBLISH message to publish
// [v3.1.1] DUP flag from an incoming PUBLISH message is not propagated to subscribers
// It should be set in the outgoing PUBLISH message based on transmission for each subscriber
MqttMsgPublish publish = new MqttMsgPublish(e.Topic, e.Message, false, e.QosLevel, e.Retain);
// publish message through publisher manager
this.publisherManager.Publish(publish);
}
public static MqttMsgPublish Parse(byte fixedHeaderFirstByte, Socket socket)
{
byte[] buffer;
int index = 0;
byte[] topicUtf8;
int topicUtf8Length;
MqttMsgPublish msg = new MqttMsgPublish();
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(socket);
buffer = new byte[remainingLength];
// read bytes from socket...
socket.Receive(buffer);
// topic name
topicUtf8Length = ((buffer[index++] << 8) & 0xFF00);
topicUtf8Length |= buffer[index++];
topicUtf8 = new byte[topicUtf8Length];
Array.Copy(buffer, index, topicUtf8, 0, topicUtf8Length);
index += topicUtf8Length;
msg.topic = new String(Encoding.UTF8.GetChars(topicUtf8));
// read QoS level from fixed header
msg.qosLevel = (byte)((fixedHeaderFirstByte & QOS_LEVEL_MASK) >> QOS_LEVEL_OFFSET);
// read DUP flag from fixed header
msg.dupFlag = (((fixedHeaderFirstByte & DUP_FLAG_MASK) >> DUP_FLAG_OFFSET) == 0x01);
// read retain flag from fixed header
msg.retain = (((fixedHeaderFirstByte & RETAIN_FLAG_MASK) >> RETAIN_FLAG_OFFSET) == 0x01);
// message id is valid only with QOS level 1 or QOS level 2
if ((msg.qosLevel == QOS_LEVEL_AT_LEAST_ONCE) ||
(msg.qosLevel == QOS_LEVEL_EXACTLY_ONCE))
{
// message id
msg.messageId = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.messageId |= (buffer[index++]);
}
// get payload with message data
msg.message = new byte[remainingLength - index];
Array.Copy(buffer, index, msg.message, 0, msg.message.Length);
return(msg);
}
public virtual void PublishToMqttClients(MqttMsgPublish message)
{
((MqttManager)Composable.GetExport<IXSocketController>(typeof(MqttManager))).publisherManager.Publish(message);
}
/// <summary>
/// Parse bytes for a PUBLISH message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PUBLISH message instance</returns>
public static MqttMsgPublish Parse(byte fixedHeaderFirstByte, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
byte[] topicUtf8;
int topicUtf8Length;
MqttMsgPublish msg = new MqttMsgPublish();
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
int received = channel.Receive(buffer);
// topic name
topicUtf8Length = ((buffer[index++] << 8) & 0xFF00);
topicUtf8Length |= buffer[index++];
topicUtf8 = new byte[topicUtf8Length];
Array.Copy(buffer, index, topicUtf8, 0, topicUtf8Length);
index += topicUtf8Length;
msg.topic = new String(Encoding.UTF8.GetChars(topicUtf8));
// read QoS level from fixed header
msg.qosLevel = (byte)((fixedHeaderFirstByte & QOS_LEVEL_MASK) >> QOS_LEVEL_OFFSET);
// read DUP flag from fixed header
msg.dupFlag = (((fixedHeaderFirstByte & DUP_FLAG_MASK) >> DUP_FLAG_OFFSET) == 0x01);
// read retain flag from fixed header
msg.retain = (((fixedHeaderFirstByte & RETAIN_FLAG_MASK) >> RETAIN_FLAG_OFFSET) == 0x01);
// message id is valid only with QOS level 1 or QOS level 2
if ((msg.qosLevel == QOS_LEVEL_AT_LEAST_ONCE) ||
(msg.qosLevel == QOS_LEVEL_EXACTLY_ONCE))
{
// message id
msg.messageId = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.messageId |= (buffer[index++]);
}
// get payload with message data
int messageSize = remainingLength - index;
int remaining = messageSize;
int messageOffset = 0;
msg.message = new byte[messageSize];
// BUG FIX 26/07/2013 : receiving large payload
// copy first part of payload data received
Array.Copy(buffer, index, msg.message, messageOffset, received - index);
remaining -= (received - index);
messageOffset += (received - index);
// if payload isn't finished
while (remaining > 0)
{
// receive other payload data
received = channel.Receive(buffer);
Array.Copy(buffer, 0, msg.message, messageOffset, received);
remaining -= received;
messageOffset += received;
}
return(msg);
}
/// <summary>
/// Wrapper method for raising PUBLISH message received event
/// </summary>
/// <param name="publish">PUBLISH message received</param>
private void OnMqttMsgPublishReceived(MqttMsgPublish publish)
{
if (this.MqttMsgPublishReceived != null)
{
this.MqttMsgPublishReceived(this,
new MqttMsgPublishEventArgs(publish.Topic, publish.Message, publish.QosLevel, publish.Retain));
}
}
/// <summary>
/// Publish a message to the broker
/// </summary>
/// <param name="topic">Message topic</param>
/// <param name="message">Message data (payload)</param>
/// <param name="qosLevel">QoS Level</param>
/// <param name="retain">Retain flag</param>
/// <returns>Message Id related to PUBLISH message</returns>
public ushort Publish(string topic, byte[] message,
byte qosLevel = MqttMsgBase.QOS_LEVEL_AT_MOST_ONCE,
bool retain = false)
{
ushort messageId = 0;
int attempts = 0;
bool acknowledged = false;
MqttMsgPublish publish =
new MqttMsgPublish(topic, message, false, qosLevel, retain);
// based on QoS level, the messages flow between client and broker changes
switch (qosLevel)
{
// QoS Level 0, no answer from broker
case MqttMsgBase.QOS_LEVEL_AT_MOST_ONCE:
this.Send(publish.GetBytes());
break;
// QoS Level 1, waiting for PUBACK message from broker
case MqttMsgBase.QOS_LEVEL_AT_LEAST_ONCE:
attempts = 0;
acknowledged = false;
do
{
MqttMsgPuback puback = null;
try
{
// try publish
puback = (MqttMsgPuback)this.SendReceive(publish.GetBytes());
acknowledged = true;
}
catch (MqttTimeoutException)
{
// no PUBACK message received in time, retry with duplicate flag
attempts++;
publish.DupFlag = true;
// delay before retry
if (attempts < MQTT_ATTEMPTS_RETRY)
Thread.Sleep(MQTT_DELAY_RETRY);
}
} while ((attempts < MQTT_ATTEMPTS_RETRY) && !acknowledged);
if (acknowledged)
messageId = publish.MessageId;
break;
// QoS Level 2, waiting for PUBREC message from broker,
// send PUBREL message and waiting for PUBCOMP message from broker
case MqttMsgBase.QOS_LEVEL_EXACTLY_ONCE:
attempts = 0;
acknowledged = false;
do
{
MqttMsgPubrec pubrec = null;
try
{
// try publish
pubrec = (MqttMsgPubrec)this.SendReceive(publish.GetBytes());
acknowledged = true;
}
catch (MqttTimeoutException)
{
// no PUBREC message received in time, retry with duplicate flag
attempts++;
publish.DupFlag = true;
// delay before retry
if (attempts < MQTT_ATTEMPTS_RETRY)
Thread.Sleep(MQTT_DELAY_RETRY);
}
} while ((attempts < MQTT_ATTEMPTS_RETRY) && !acknowledged);
// first phase ok
if (acknowledged)
{
attempts = 0;
acknowledged = false;
do
{
// set publish message identifier into PUBREL message
MqttMsgPubrel pubrel = new MqttMsgPubrel();
pubrel.MessageId = publish.MessageId;
MqttMsgPubcomp pubcomp = null;
try
{
// try send PUBREL message
pubcomp = (MqttMsgPubcomp)this.SendReceive(pubrel.GetBytes());
acknowledged = true;
}
catch (MqttTimeoutException)
{
// no PUBCOMP message received in time, retry with duplicate flag
attempts++;
pubrel.DupFlag = true;
// delay before retry
if (attempts < MQTT_ATTEMPTS_RETRY)
Thread.Sleep(MQTT_DELAY_RETRY);
}
} while ((attempts < MQTT_ATTEMPTS_RETRY) && !acknowledged);
if (acknowledged)
messageId = publish.MessageId;
}
break;
default:
throw new MqttClientException(MqttClientErrorCode.QosNotAllowed);
}
return messageId;
}
/// <summary>
/// Close a client
/// </summary>
/// <param name="client">Client to close</param>
private void CloseClient(MqttClient client)
{
if (this.clients.Contains(client))
{
// if client is connected and it has a will message
if (!client.IsConnected && client.WillFlag)
{
// create the will PUBLISH message
MqttMsgPublish publish =
new MqttMsgPublish(client.WillTopic, Encoding.UTF8.GetBytes(client.WillMessage), false, client.WillQosLevel, false);
// publish message through publisher manager
this.publisherManager.Publish(publish);
}
// if not clean session
if (!client.CleanSession)
{
List<MqttSubscription> subscriptions = this.subscriberManager.GetSubscriptionsByClient(client.ClientId);
if ((subscriptions != null) && (subscriptions.Count > 0))
{
this.sessionManager.SaveSession(client.ClientId, client.Session, subscriptions);
// TODO : persist client session if broker close
}
}
// delete client from runtime subscription
this.subscriberManager.Unsubscribe(client);
// close the client
client.Close();
// remove client from the collection
this.clients.Remove(client);
mqttBridge.OnClientDisconnect(client);
}
}
/// <summary>
/// Publish a message asynchronously
/// </summary>
/// <param name="topic">Message topic</param>
/// <param name="message">Message data (payload)</param>
/// <param name="qosLevel">QoS Level</param>
/// <param name="retain">Retain flag</param>
/// <returns>Message Id related to PUBLISH message</returns>
public ushort Publish(string topic, byte[] message, byte qosLevel, bool retain)
{
MqttMsgPublish publish =
new MqttMsgPublish(topic, message, false, qosLevel, retain);
publish.MessageId = this.GetMessageId();
// enqueue message to publish into the inflight queue
this.EnqueueInflight(publish, MqttMsgFlow.ToPublish);
return publish.MessageId;
}
public static MqttMsgPublish Parse(byte fixedHeaderFirstByte, Socket socket)
{
byte[] buffer;
int index = 0;
byte[] topicUtf8;
int topicUtf8Length;
MqttMsgPublish msg = new MqttMsgPublish();
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(socket);
buffer = new byte[remainingLength];
// read bytes from socket...
socket.Receive(buffer);
// topic name
topicUtf8Length = ((buffer[index++] << 8) & 0xFF00);
topicUtf8Length |= buffer[index++];
topicUtf8 = new byte[topicUtf8Length];
Array.Copy(buffer, index, topicUtf8, 0, topicUtf8Length);
index += topicUtf8Length;
msg.topic = new String(Encoding.UTF8.GetChars(topicUtf8));
// read QoS level from fixed header
msg.qosLevel = (byte)((fixedHeaderFirstByte & QOS_LEVEL_MASK) >> QOS_LEVEL_OFFSET);
// read DUP flag from fixed header
msg.dupFlag = (((fixedHeaderFirstByte & DUP_FLAG_MASK) >> DUP_FLAG_OFFSET) == 0x01);
// read retain flag from fixed header
msg.retain = (((fixedHeaderFirstByte & RETAIN_FLAG_MASK) >> RETAIN_FLAG_OFFSET) == 0x01);
// message id is valid only with QOS level 1 or QOS level 2
if ((msg.qosLevel == QOS_LEVEL_AT_LEAST_ONCE) ||
(msg.qosLevel == QOS_LEVEL_EXACTLY_ONCE))
{
// message id
msg.messageId = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.messageId |= (buffer[index++]);
}
// get payload with message data
msg.message = new byte[remainingLength - index];
Array.Copy(buffer, index, msg.message, 0, msg.message.Length);
return msg;
}
/// <summary>
/// Parse bytes for a PUBLISH message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PUBLISH message instance</returns>
public static MqttMsgPublish Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
byte[] topicUtf8;
int topicUtf8Length;
MqttMsgPublish msg = new MqttMsgPublish();
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
int received = channel.Receive(buffer);
// topic name
topicUtf8Length = ((buffer[index++] << 8) & 0xFF00);
topicUtf8Length |= buffer[index++];
topicUtf8 = new byte[topicUtf8Length];
Array.Copy(buffer, index, topicUtf8, 0, topicUtf8Length);
index += topicUtf8Length;
msg.topic = new String(Encoding.UTF8.GetChars(topicUtf8));
// read QoS level from fixed header
msg.qosLevel = (byte)((fixedHeaderFirstByte & QOS_LEVEL_MASK) >> QOS_LEVEL_OFFSET);
// check wrong QoS level (both bits can't be set 1)
if (msg.qosLevel > QOS_LEVEL_EXACTLY_ONCE)
throw new MqttClientException(MqttClientErrorCode.QosNotAllowed);
// read DUP flag from fixed header
msg.dupFlag = (((fixedHeaderFirstByte & DUP_FLAG_MASK) >> DUP_FLAG_OFFSET) == 0x01);
// read retain flag from fixed header
msg.retain = (((fixedHeaderFirstByte & RETAIN_FLAG_MASK) >> RETAIN_FLAG_OFFSET) == 0x01);
// message id is valid only with QOS level 1 or QOS level 2
if ((msg.qosLevel == QOS_LEVEL_AT_LEAST_ONCE) ||
(msg.qosLevel == QOS_LEVEL_EXACTLY_ONCE))
{
// message id
msg.messageId = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.messageId |= (buffer[index++]);
}
// get payload with message data
int messageSize = remainingLength - index;
int remaining = messageSize;
int messageOffset = 0;
msg.message = new byte[messageSize];
// BUG FIX 26/07/2013 : receiving large payload
// copy first part of payload data received
Array.Copy(buffer, index, msg.message, messageOffset, received - index);
remaining -= (received - index);
messageOffset += (received - index);
// if payload isn't finished
while (remaining > 0)
{
// receive other payload data
received = channel.Receive(buffer);
Array.Copy(buffer, 0, msg.message, messageOffset, received);
remaining -= received;
messageOffset += received;
}
return msg;
}
/// <summary>
/// Publish message
/// </summary>
/// <param name="publish">Message to publish</param>
public void Publish(MqttMsgPublish publish)
{
if (publish.Retain)
{
lock (this.retainedMessages)
{
// retained message already exists for the topic
if (retainedMessages.ContainsKey(publish.Topic))
{
// if empty message, remove current retained message
if (publish.Message.Length == 0)
retainedMessages.Remove(publish.Topic);
// set new retained message for the topic
else
retainedMessages[publish.Topic] = publish;
}
else
{
// add new topic with related retained message
retainedMessages.Add(publish.Topic, publish);
}
}
}
// enqueue
lock (this.publishQueue)
{
this.publishQueue.Enqueue(publish);
}
// unlock thread for sending messages to the subscribers
this.publishQueueWaitHandle.Set();
}
void Client_MqttMsgPublishReceived(object sender, MqttMsgPublishEventArgs e)
{
MqttClient client = (MqttClient)sender;
// create PUBLISH message to publish
// [v3.1.1] DUP flag from an incoming PUBLISH message is not propagated to subscribers
// It should be set in the outgoing PUBLISH message based on transmission for each subscriber
MqttMsgPublish publish = new MqttMsgPublish(e.Topic, e.Message, false, e.QosLevel, e.Retain);
// Authenticate this client can communicate with this topic
if (this.uacManager.PubSubAuthentication(true, client.ClientId, e.Topic))
{
// publish message through publisher manager
this.publisherManager.Publish(publish);
}
}
public static MqttMsgPublish Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
int num1 = 0;
MqttMsgPublish mqttMsgPublish1 = new MqttMsgPublish();
int length1 = MqttMsgBase.decodeRemainingLength(channel);
byte[] buffer = new byte[length1];
int num2 = channel.Receive(buffer);
byte[] numArray1 = buffer;
int index1 = num1;
int num3 = checked (index1 + 1);
int num4 = (int)numArray1[index1] << 8 & 65280;
byte[] numArray2 = buffer;
int index2 = num3;
int sourceIndex1 = checked (index2 + 1);
int num5 = (int)numArray2[index2];
int length2 = num4 | num5;
byte[] bytes = new byte[length2];
Array.Copy((Array)buffer, sourceIndex1, (Array)bytes, 0, length2);
int sourceIndex2 = checked (sourceIndex1 + length2);
mqttMsgPublish1.topic = new string(Encoding.UTF8.GetChars(bytes));
mqttMsgPublish1.qosLevel = checked ((byte)(((int)fixedHeaderFirstByte & 6) >> 1));
if (mqttMsgPublish1.qosLevel > (byte)2)
{
throw new MqttClientException(MqttClientErrorCode.QosNotAllowed);
}
mqttMsgPublish1.dupFlag = ((int)fixedHeaderFirstByte & 8) >> 3 == 1;
mqttMsgPublish1.retain = ((int)fixedHeaderFirstByte & 1) == 1;
if (mqttMsgPublish1.qosLevel == (byte)1 || mqttMsgPublish1.qosLevel == (byte)2)
{
MqttMsgPublish mqttMsgPublish2 = mqttMsgPublish1;
byte[] numArray3 = buffer;
int index3 = sourceIndex2;
int num6 = checked (index3 + 1);
int num7 = (int)checked ((ushort)((int)numArray3[index3] << 8 & 65280));
mqttMsgPublish2.messageId = (ushort)num7;
MqttMsgPublish mqttMsgPublish3 = mqttMsgPublish1;
int messageId = (int)mqttMsgPublish3.messageId;
byte[] numArray4 = buffer;
int index4 = num6;
sourceIndex2 = checked (index4 + 1);
int num8 = (int)numArray4[index4];
mqttMsgPublish3.messageId = (ushort)(messageId | num8);
}
int length3 = checked (length1 - sourceIndex2);
int num9 = length3;
int destinationIndex1 = 0;
mqttMsgPublish1.message = new byte[length3];
Array.Copy((Array)buffer, sourceIndex2, (Array)mqttMsgPublish1.message, destinationIndex1, checked (num2 - sourceIndex2));
int num10 = checked (num9 - num2 - sourceIndex2);
int destinationIndex2 = checked (destinationIndex1 + num2 - sourceIndex2);
while (num10 > 0)
{
int length4 = channel.Receive(buffer);
Array.Copy((Array)buffer, 0, (Array)mqttMsgPublish1.message, destinationIndex2, length4);
checked { num10 -= length4; }
checked { destinationIndex2 += length4; }
}
return(mqttMsgPublish1);
}
