public void WriteUserProperties(List <MqttUserProperty> userProperties)
{
if (userProperties == null || userProperties.Count == 0)
{
return;
}
foreach (var property in userProperties)
{
_bufferWriter.WriteByte((byte)MqttPropertyId.UserProperty);
_bufferWriter.WriteString(property.Name);
_bufferWriter.WriteString(property.Value);
}
}
static byte EncodeSubscribePacket(MqttSubscribePacket packet, MqttBufferWriter bufferWriter)
{
if (!packet.TopicFilters.Any())
{
throw new MqttProtocolViolationException("At least one topic filter must be set [MQTT-3.8.3-3].");
}
if (packet.PacketIdentifier == 0)
{
throw new MqttProtocolViolationException("Subscribe packet has no packet identifier.");
}
bufferWriter.WriteTwoByteInteger(packet.PacketIdentifier);
if (packet.TopicFilters?.Count > 0)
{
foreach (var topicFilter in packet.TopicFilters)
{
bufferWriter.WriteString(topicFilter.Topic);
bufferWriter.WriteByte((byte)topicFilter.QualityOfServiceLevel);
}
}
return(MqttBufferWriter.BuildFixedHeader(MqttControlPacketType.Subscribe, 0x02));
}
public void Write_And_Read_Multiple_Times()
{
var writer = new MqttBufferWriter(4096, 65535);
writer.WriteString("A relative short string.");
writer.WriteBinaryData(new byte[1234]);
writer.WriteByte(0x01);
writer.WriteByte(0x02);
writer.WriteVariableByteInteger(5647382);
writer.WriteString("A relative short string.");
writer.WriteVariableByteInteger(8574489);
writer.WriteBinaryData(new byte[48]);
writer.WriteByte(2);
writer.WriteByte(0x02);
writer.WriteString("fjgffiogfhgfhoihgoireghreghreguhreguireoghreouighreouighreughreguiorehreuiohruiorehreuioghreug");
writer.WriteBinaryData(new byte[3]);
var readPayload = new ArraySegment <byte>(writer.GetBuffer(), 0, writer.Length).ToArray();
var reader = new MqttBufferReader();
reader.SetBuffer(readPayload, 0, readPayload.Length);
for (var i = 0; i < 100000; i++)
{
reader.Seek(0);
reader.ReadString();
reader.ReadBinaryData();
reader.ReadByte();
reader.ReadByte();
reader.ReadVariableByteInteger();
reader.ReadString();
reader.ReadVariableByteInteger();
reader.ReadBinaryData();
reader.ReadByte();
reader.ReadByte();
reader.ReadString();
reader.ReadBinaryData();
}
}
public void Write_100_000_Messages()
{
var writer = new MqttBufferWriter(4096, 65535);
for (var i = 0; i < 100000; i++)
{
writer.WriteString("A relative short string.");
writer.WriteByte(0x01);
writer.WriteByte(0x02);
writer.WriteVariableByteInteger(5647382);
writer.WriteString("A relative short string.");
writer.WriteVariableByteInteger(8574589);
writer.WriteBinaryData(_demoPayload);
writer.WriteByte(2);
writer.WriteByte(0x02);
writer.WriteString("fjgffiogfhgfhoihgoireghreghreguhreguireoghreouighreouighreughreguiorehreuiohruiorehreuioghreug");
writer.WriteBinaryData(_demoPayload);
writer.Reset(0);
}
}
public void GlobalSetup()
{
TestEnvironment.EnableLogger = false;
var writer = new MqttBufferWriter(4096, 65535);
writer.WriteString("A relative short string.");
writer.WriteBinaryData(_demoPayload);
writer.WriteByte(0x01);
writer.WriteByte(0x02);
writer.WriteVariableByteInteger(5647382);
writer.WriteString("A relative short string.");
writer.WriteVariableByteInteger(8574489);
writer.WriteBinaryData(_demoPayload);
writer.WriteByte(2);
writer.WriteByte(0x02);
writer.WriteString("fjgffiogfhgfhoihgoireghreghreguhreguireoghreouighreouighreughreguiorehreuiohruiorehreuioghreug");
writer.WriteBinaryData(_demoPayload);
_readPayload = new ArraySegment <byte>(writer.GetBuffer(), 0, writer.Length).ToArray();
}
public void Reset_After_Usage()
{
var writer = new MqttBufferWriter(4096, 65535);
writer.WriteString("AString");
writer.WriteByte(0x1);
writer.WriteByte(0x0);
writer.WriteByte(0x1);
writer.WriteVariableByteInteger(1234U);
writer.WriteVariableByteInteger(9876U);
writer.Reset(0);
Assert.AreEqual(0, writer.Length);
}
static byte EncodePublishPacket(MqttPublishPacket packet, MqttBufferWriter bufferWriter)
{
ValidatePublishPacket(packet);
bufferWriter.WriteString(packet.Topic);
if (packet.QualityOfServiceLevel > MqttQualityOfServiceLevel.AtMostOnce)
{
if (packet.PacketIdentifier == 0)
{
throw new MqttProtocolViolationException("Publish packet has no packet identifier.");
}
bufferWriter.WriteTwoByteInteger(packet.PacketIdentifier);
}
else
{
if (packet.PacketIdentifier > 0)
{
throw new MqttProtocolViolationException("Packet identifier must be empty if QoS == 0 [MQTT-2.3.1-5].");
}
}
// The payload is the past part of the packet. But it is not added here in order to keep
// memory allocation low.
byte fixedHeader = 0;
if (packet.Retain)
{
fixedHeader |= 0x01;
}
fixedHeader |= (byte)((byte)packet.QualityOfServiceLevel << 1);
if (packet.Dup)
{
fixedHeader |= 0x08;
}
return(MqttBufferWriter.BuildFixedHeader(MqttControlPacketType.Publish, fixedHeader));
}
static byte EncodeUnsubscribePacket(MqttUnsubscribePacket packet, MqttBufferWriter bufferWriter)
{
if (!packet.TopicFilters.Any())
{
throw new MqttProtocolViolationException("At least one topic filter must be set [MQTT-3.10.3-2].");
}
if (packet.PacketIdentifier == 0)
{
throw new MqttProtocolViolationException("Unsubscribe packet has no packet identifier.");
}
bufferWriter.WriteTwoByteInteger(packet.PacketIdentifier);
if (packet.TopicFilters?.Any() == true)
{
foreach (var topicFilter in packet.TopicFilters)
{
bufferWriter.WriteString(topicFilter);
}
}
return(MqttBufferWriter.BuildFixedHeader(MqttControlPacketType.Unsubscibe, 0x02));
}
public void Use_All_Data_Types()
{
var writer = new MqttBufferWriter(4096, 65535);
writer.WriteString("AString");
writer.WriteByte(0x1);
writer.WriteByte(0x0);
writer.WriteByte(0x1);
writer.WriteVariableByteInteger(1234U);
writer.WriteVariableByteInteger(9876U);
var buffer = writer.GetBuffer();
var reader = new MqttBufferReader();
reader.SetBuffer(buffer, 0, writer.Length);
Assert.AreEqual("AString", reader.ReadString());
Assert.IsTrue(reader.ReadByte() == 1);
Assert.IsTrue(reader.ReadByte() == 0);
Assert.IsTrue(reader.ReadByte() == 1);
Assert.AreEqual(1234U, reader.ReadVariableByteInteger());
Assert.AreEqual(9876U, reader.ReadVariableByteInteger());
}
byte EncodeConnectPacketV311(MqttConnectPacket packet, MqttBufferWriter bufferWriter)
{
ValidateConnectPacket(packet);
bufferWriter.WriteString("MQTT");
bufferWriter.WriteByte(4); // 3.1.2.2 Protocol Level 4
byte connectFlags = 0x0;
if (packet.CleanSession)
{
connectFlags |= 0x2;
}
if (packet.WillFlag)
{
connectFlags |= 0x4;
connectFlags |= (byte)((byte)packet.WillQoS << 3);
if (packet.WillRetain)
{
connectFlags |= 0x20;
}
}
if (packet.Password != null && packet.Username == null)
{
throw new MqttProtocolViolationException("If the User Name Flag is set to 0, the Password Flag MUST be set to 0 [MQTT-3.1.2-22].");
}
if (packet.Password != null)
{
connectFlags |= 0x40;
}
if (packet.Username != null)
{
connectFlags |= 0x80;
}
bufferWriter.WriteByte(connectFlags);
bufferWriter.WriteTwoByteInteger(packet.KeepAlivePeriod);
bufferWriter.WriteString(packet.ClientId);
if (packet.WillFlag)
{
bufferWriter.WriteString(packet.WillTopic);
bufferWriter.WriteBinaryData(packet.WillMessage);
}
if (packet.Username != null)
{
bufferWriter.WriteString(packet.Username);
}
if (packet.Password != null)
{
bufferWriter.WriteBinaryData(packet.Password);
}
return(MqttBufferWriter.BuildFixedHeader(MqttControlPacketType.Connect));
}
byte EncodeConnectPacket(MqttConnectPacket packet)
{
if (string.IsNullOrEmpty(packet.ClientId) && !packet.CleanSession)
{
throw new MqttProtocolViolationException("CleanSession must be set if ClientId is empty [MQTT-3.1.3-7].");
}
_bufferWriter.WriteString("MQTT");
_bufferWriter.WriteByte(5); // [3.1.2.2 Protocol Version]
byte connectFlags = 0x0;
if (packet.CleanSession)
{
connectFlags |= 0x2;
}
if (packet.WillFlag)
{
connectFlags |= 0x4;
connectFlags |= (byte)((byte)packet.WillQoS << 3);
if (packet.WillRetain)
{
connectFlags |= 0x20;
}
}
if (packet.Password != null && packet.Username == null)
{
throw new MqttProtocolViolationException("If the User Name Flag is set to 0, the Password Flag MUST be set to 0 [MQTT-3.1.2-22].");
}
if (packet.Password != null)
{
connectFlags |= 0x40;
}
if (packet.Username != null)
{
connectFlags |= 0x80;
}
_bufferWriter.WriteByte(connectFlags);
_bufferWriter.WriteTwoByteInteger(packet.KeepAlivePeriod);
_propertiesWriter.WriteSessionExpiryInterval(packet.SessionExpiryInterval);
_propertiesWriter.WriteAuthenticationMethod(packet.AuthenticationMethod);
_propertiesWriter.WriteAuthenticationData(packet.AuthenticationData);
_propertiesWriter.WriteRequestProblemInformation(packet.RequestProblemInformation);
_propertiesWriter.WriteRequestResponseInformation(packet.RequestResponseInformation);
_propertiesWriter.WriteReceiveMaximum(packet.ReceiveMaximum);
_propertiesWriter.WriteTopicAliasMaximum(packet.TopicAliasMaximum);
_propertiesWriter.WriteMaximumPacketSize(packet.MaximumPacketSize);
_propertiesWriter.WriteUserProperties(packet.UserProperties);
_propertiesWriter.WriteTo(_bufferWriter);
_propertiesWriter.Reset();
_bufferWriter.WriteString(packet.ClientId);
if (packet.WillFlag)
{
_propertiesWriter.WritePayloadFormatIndicator(packet.WillPayloadFormatIndicator);
_propertiesWriter.WriteMessageExpiryInterval(packet.WillMessageExpiryInterval);
_propertiesWriter.WriteResponseTopic(packet.WillResponseTopic);
_propertiesWriter.WriteCorrelationData(packet.WillCorrelationData);
_propertiesWriter.WriteContentType(packet.WillContentType);
_propertiesWriter.WriteUserProperties(packet.WillUserProperties);
_propertiesWriter.WriteWillDelayInterval(packet.WillDelayInterval);
_propertiesWriter.WriteTo(_bufferWriter);
_propertiesWriter.Reset();
_bufferWriter.WriteString(packet.WillTopic);
_bufferWriter.WriteBinaryData(packet.WillMessage);
}
if (packet.Username != null)
{
_bufferWriter.WriteString(packet.Username);
}
if (packet.Password != null)
{
_bufferWriter.WriteBinaryData(packet.Password);
}
return(MqttBufferWriter.BuildFixedHeader(MqttControlPacketType.Connect));
}