MqttPacket DecodeAuthPacket(ArraySegment <byte> body) { ThrowIfBodyIsEmpty(body); _bufferReader.SetBuffer(body.Array, body.Offset, body.Count); var packet = new MqttAuthPacket(); if (_bufferReader.EndOfStream) { packet.ReasonCode = MqttAuthenticateReasonCode.Success; return(packet); } packet.ReasonCode = (MqttAuthenticateReasonCode)_bufferReader.ReadByte(); var propertiesReader = new MqttV5PropertiesReader(_bufferReader); while (propertiesReader.MoveNext()) { if (propertiesReader.CurrentPropertyId == MqttPropertyId.AuthenticationMethod) { packet.AuthenticationMethod = propertiesReader.ReadAuthenticationMethod(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.AuthenticationData) { packet.AuthenticationData = propertiesReader.ReadAuthenticationData(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ReasonString) { packet.ReasonString = propertiesReader.ReadReasonString(); } else { propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttAuthPacket)); } } packet.UserProperties = propertiesReader.CollectedUserProperties; return(packet); }
MqttPacket DecodeConnectPacket(ArraySegment <byte> body) { ThrowIfBodyIsEmpty(body); _bufferReader.SetBuffer(body.Array, body.Offset, body.Count); var packet = new MqttConnectPacket { // If the Request Problem Information is absent, the value of 1 is used. RequestProblemInformation = true }; var protocolName = _bufferReader.ReadString(); var protocolVersion = _bufferReader.ReadByte(); if (protocolName != "MQTT" && protocolVersion != 5) { throw new MqttProtocolViolationException("MQTT protocol name and version do not match MQTT v5."); } var connectFlags = _bufferReader.ReadByte(); var cleanSessionFlag = (connectFlags & 0x02) > 0; var willMessageFlag = (connectFlags & 0x04) > 0; var willMessageQoS = (byte)((connectFlags >> 3) & 3); var willMessageRetainFlag = (connectFlags & 0x20) > 0; var passwordFlag = (connectFlags & 0x40) > 0; var usernameFlag = (connectFlags & 0x80) > 0; packet.CleanSession = cleanSessionFlag; if (willMessageFlag) { packet.WillFlag = true; packet.WillQoS = (MqttQualityOfServiceLevel)willMessageQoS; packet.WillRetain = willMessageRetainFlag; } packet.KeepAlivePeriod = _bufferReader.ReadTwoByteInteger(); var propertiesReader = new MqttV5PropertiesReader(_bufferReader); while (propertiesReader.MoveNext()) { if (propertiesReader.CurrentPropertyId == MqttPropertyId.SessionExpiryInterval) { packet.SessionExpiryInterval = propertiesReader.ReadSessionExpiryInterval(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.AuthenticationMethod) { packet.AuthenticationMethod = propertiesReader.ReadAuthenticationMethod(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.AuthenticationData) { packet.AuthenticationData = propertiesReader.ReadAuthenticationData(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ReceiveMaximum) { packet.ReceiveMaximum = propertiesReader.ReadReceiveMaximum(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.TopicAliasMaximum) { packet.TopicAliasMaximum = propertiesReader.ReadTopicAliasMaximum(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.MaximumPacketSize) { packet.MaximumPacketSize = propertiesReader.ReadMaximumPacketSize(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.RequestResponseInformation) { packet.RequestResponseInformation = propertiesReader.RequestResponseInformation(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.RequestProblemInformation) { packet.RequestProblemInformation = propertiesReader.RequestProblemInformation(); } else { propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttConnectPacket)); } } packet.UserProperties = propertiesReader.CollectedUserProperties; packet.ClientId = _bufferReader.ReadString(); if (packet.WillFlag) { var willPropertiesReader = new MqttV5PropertiesReader(_bufferReader); while (willPropertiesReader.MoveNext()) { if (willPropertiesReader.CurrentPropertyId == MqttPropertyId.PayloadFormatIndicator) { packet.WillPayloadFormatIndicator = willPropertiesReader.ReadPayloadFormatIndicator(); } else if (willPropertiesReader.CurrentPropertyId == MqttPropertyId.MessageExpiryInterval) { packet.WillMessageExpiryInterval = willPropertiesReader.ReadMessageExpiryInterval(); } else if (willPropertiesReader.CurrentPropertyId == MqttPropertyId.ResponseTopic) { packet.WillResponseTopic = willPropertiesReader.ReadResponseTopic(); } else if (willPropertiesReader.CurrentPropertyId == MqttPropertyId.CorrelationData) { packet.WillCorrelationData = willPropertiesReader.ReadCorrelationData(); } else if (willPropertiesReader.CurrentPropertyId == MqttPropertyId.ContentType) { packet.WillContentType = willPropertiesReader.ReadContentType(); } else if (willPropertiesReader.CurrentPropertyId == MqttPropertyId.WillDelayInterval) { packet.WillDelayInterval = willPropertiesReader.ReadWillDelayInterval(); } else { willPropertiesReader.ThrowInvalidPropertyIdException(typeof(MqttPublishPacket)); } } packet.WillTopic = _bufferReader.ReadString(); packet.WillMessage = _bufferReader.ReadBinaryData(); packet.WillUserProperties = willPropertiesReader.CollectedUserProperties; } if (usernameFlag) { packet.Username = _bufferReader.ReadString(); } if (passwordFlag) { packet.Password = _bufferReader.ReadBinaryData(); } return(packet); }
MqttPacket DecodeConnAckPacket(ArraySegment <byte> body) { ThrowIfBodyIsEmpty(body); _bufferReader.SetBuffer(body.Array, body.Offset, body.Count); var acknowledgeFlags = _bufferReader.ReadByte(); var packet = new MqttConnAckPacket { IsSessionPresent = (acknowledgeFlags & 0x1) > 0, ReasonCode = (MqttConnectReasonCode)_bufferReader.ReadByte(), // indicate that a feature is available. // Set all default values according to specification. When they are missing the often RetainAvailable = true, SharedSubscriptionAvailable = true, SubscriptionIdentifiersAvailable = true, WildcardSubscriptionAvailable = true, // Absence indicates max QoS level. MaximumQoS = MqttQualityOfServiceLevel.ExactlyOnce }; var propertiesReader = new MqttV5PropertiesReader(_bufferReader); while (propertiesReader.MoveNext()) { if (propertiesReader.CurrentPropertyId == MqttPropertyId.SessionExpiryInterval) { packet.SessionExpiryInterval = propertiesReader.ReadSessionExpiryInterval(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.AuthenticationMethod) { packet.AuthenticationMethod = propertiesReader.ReadAuthenticationMethod(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.AuthenticationData) { packet.AuthenticationData = propertiesReader.ReadAuthenticationData(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.RetainAvailable) { packet.RetainAvailable = propertiesReader.ReadRetainAvailable(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ReceiveMaximum) { packet.ReceiveMaximum = propertiesReader.ReadReceiveMaximum(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.MaximumQoS) { packet.MaximumQoS = propertiesReader.ReadMaximumQoS(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.AssignedClientIdentifier) { packet.AssignedClientIdentifier = propertiesReader.ReadAssignedClientIdentifier(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.TopicAliasMaximum) { packet.TopicAliasMaximum = propertiesReader.ReadTopicAliasMaximum(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ReasonString) { packet.ReasonString = propertiesReader.ReadReasonString(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.MaximumPacketSize) { packet.MaximumPacketSize = propertiesReader.ReadMaximumPacketSize(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.WildcardSubscriptionAvailable) { packet.WildcardSubscriptionAvailable = propertiesReader.ReadWildcardSubscriptionAvailable(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.SubscriptionIdentifiersAvailable) { packet.SubscriptionIdentifiersAvailable = propertiesReader.ReadSubscriptionIdentifiersAvailable(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.SharedSubscriptionAvailable) { packet.SharedSubscriptionAvailable = propertiesReader.ReadSharedSubscriptionAvailable(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ServerKeepAlive) { packet.ServerKeepAlive = propertiesReader.ReadServerKeepAlive(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ResponseInformation) { packet.ResponseInformation = propertiesReader.ReadResponseInformation(); } else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ServerReference) { packet.ServerReference = propertiesReader.ReadServerReference(); } else { propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttConnAckPacket)); } } packet.UserProperties = propertiesReader.CollectedUserProperties; return(packet); }