Ejemplo n.º 1
0
        private static MqttBasePacket DecodeSubscribePacket(IMqttPacketBodyReader body)
        {
            ThrowIfBodyIsEmpty(body);

            var packet = new MqttSubscribePacket
            {
                PacketIdentifier = body.ReadTwoByteInteger()
            };

            var propertiesReader = new MqttV500PropertiesReader(body);

            while (propertiesReader.MoveNext())
            {
                if (packet.Properties == null)
                {
                    packet.Properties = new MqttSubscribePacketProperties();
                }

                if (propertiesReader.CurrentPropertyId == MqttPropertyId.SubscriptionIdentifier)
                {
                    packet.Properties.SubscriptionIdentifier = propertiesReader.ReadSubscriptionIdentifier();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.UserProperty)
                {
                    if (packet.Properties.UserProperties == null)
                    {
                        packet.Properties.UserProperties = new List <MqttUserProperty>();
                    }

                    propertiesReader.AddUserPropertyTo(packet.Properties.UserProperties);
                }
                else
                {
                    propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttSubscribePacket));
                }
            }

            while (!body.EndOfStream)
            {
                var topic   = body.ReadStringWithLengthPrefix();
                var options = body.ReadByte();

                var qos               = (MqttQualityOfServiceLevel)(options & 3);
                var noLocal           = (options & (1 << 2)) > 0;
                var retainAsPublished = (options & (1 << 3)) > 0;
                var retainHandling    = (MqttRetainHandling)((options >> 4) & 3);

                packet.TopicFilters.Add(new MqttTopicFilter
                {
                    Topic = topic,
                    QualityOfServiceLevel = qos,
                    NoLocal           = noLocal,
                    RetainAsPublished = retainAsPublished,
                    RetainHandling    = retainHandling
                });
            }

            return(packet);
        }
Ejemplo n.º 2
0
        private static MqttBasePacket DecodeAuthPacket(IMqttPacketBodyReader body)
        {
            ThrowIfBodyIsEmpty(body);

            var packet = new MqttAuthPacket();

            if (body.EndOfStream)
            {
                packet.ReasonCode = MqttAuthenticateReasonCode.Success;
                return(packet);
            }

            packet.ReasonCode = (MqttAuthenticateReasonCode)body.ReadByte();

            var propertiesReader = new MqttV500PropertiesReader(body);

            while (propertiesReader.MoveNext())
            {
                if (packet.Properties == null)
                {
                    packet.Properties = new MqttAuthPacketProperties();
                }

                if (propertiesReader.CurrentPropertyId == MqttPropertyId.AuthenticationMethod)
                {
                    packet.Properties.AuthenticationMethod = propertiesReader.ReadAuthenticationMethod();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.AuthenticationData)
                {
                    packet.Properties.AuthenticationData = propertiesReader.ReadAuthenticationData();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ReasonString)
                {
                    packet.Properties.ReasonString = propertiesReader.ReadReasonString();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.UserProperty)
                {
                    if (packet.Properties.UserProperties == null)
                    {
                        packet.Properties.UserProperties = new List <MqttUserProperty>();
                    }

                    propertiesReader.AddUserPropertyTo(packet.Properties.UserProperties);
                }
                else
                {
                    propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttAuthPacket));
                }
            }

            return(packet);
        }
Ejemplo n.º 3
0
        private static MqttBasePacket DecodePubCompPacket(IMqttPacketBodyReader body)
        {
            ThrowIfBodyIsEmpty(body);

            var packet = new MqttPubCompPacket
            {
                PacketIdentifier = body.ReadTwoByteInteger()
            };

            if (body.EndOfStream)
            {
                packet.ReasonCode = MqttPubCompReasonCode.Success;
                return(packet);
            }

            packet.ReasonCode = (MqttPubCompReasonCode)body.ReadByte();

            var propertiesReader = new MqttV500PropertiesReader(body);

            while (propertiesReader.MoveNext())
            {
                if (packet.Properties == null)
                {
                    packet.Properties = new MqttPubCompPacketProperties();
                }

                if (propertiesReader.CurrentPropertyId == MqttPropertyId.ReasonString)
                {
                    packet.Properties.ReasonString = propertiesReader.ReadReasonString();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.UserProperty)
                {
                    if (packet.Properties.UserProperties == null)
                    {
                        packet.Properties.UserProperties = new List <MqttUserProperty>();
                    }

                    propertiesReader.AddUserPropertyTo(packet.Properties.UserProperties);
                }
                else
                {
                    propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttPubCompPacket));
                }
            }

            return(packet);
        }
Ejemplo n.º 4
0
        private static MqttBasePacket DecodeDisconnectPacket(IMqttPacketBodyReader body)
        {
            ThrowIfBodyIsEmpty(body);

            var packet = new MqttDisconnectPacket
            {
                ReasonCode = (MqttDisconnectReasonCode)body.ReadByte()
            };

            var propertiesReader = new MqttV500PropertiesReader(body);

            while (propertiesReader.MoveNext())
            {
                if (packet.Properties == null)
                {
                    packet.Properties = new MqttDisconnectPacketProperties();
                }

                if (propertiesReader.CurrentPropertyId == MqttPropertyId.SessionExpiryInterval)
                {
                    packet.Properties.SessionExpiryInterval = propertiesReader.ReadSessionExpiryInterval();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ReasonString)
                {
                    packet.Properties.ReasonString = propertiesReader.ReadReasonString();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ServerReference)
                {
                    packet.Properties.ServerReference = propertiesReader.ReadServerReference();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.UserProperty)
                {
                    if (packet.Properties.UserProperties == null)
                    {
                        packet.Properties.UserProperties = new List <MqttUserProperty>();
                    }

                    propertiesReader.AddUserPropertyTo(packet.Properties.UserProperties);
                }
                else
                {
                    propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttDisconnectPacket));
                }
            }

            return(packet);
        }
Ejemplo n.º 5
0
        private static MqttBasePacket DecodeUnsubscribePacket(IMqttPacketBodyReader body)
        {
            ThrowIfBodyIsEmpty(body);

            var packet = new MqttUnsubscribePacket
            {
                PacketIdentifier = body.ReadTwoByteInteger()
            };

            var propertiesReader = new MqttV500PropertiesReader(body);

            while (propertiesReader.MoveNext())
            {
                if (packet.Properties == null)
                {
                    packet.Properties = new MqttUnsubscribePacketProperties();
                }

                if (propertiesReader.CurrentPropertyId == MqttPropertyId.UserProperty)
                {
                    if (packet.Properties.UserProperties == null)
                    {
                        packet.Properties.UserProperties = new List <MqttUserProperty>();
                    }

                    propertiesReader.AddUserPropertyTo(packet.Properties.UserProperties);
                }
                else
                {
                    propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttUnsubscribePacket));
                }
            }

            while (!body.EndOfStream)
            {
                packet.TopicFilters.Add(body.ReadStringWithLengthPrefix());
            }

            return(packet);
        }
Ejemplo n.º 6
0
        private static MqttBasePacket DecodeConnectPacket(IMqttPacketBodyReader body)
        {
            ThrowIfBodyIsEmpty(body);

            var packet = new MqttConnectPacket();

            var protocolName    = body.ReadStringWithLengthPrefix();
            var protocolVersion = body.ReadByte();

            if (protocolName != "MQTT" && protocolVersion != 5)
            {
                throw new MqttProtocolViolationException("MQTT protocol name and version do not match MQTT v5.");
            }

            var connectFlags = body.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.WillMessage = new MqttApplicationMessage
                {
                    QualityOfServiceLevel = (MqttQualityOfServiceLevel)willMessageQoS,
                    Retain = willMessageRetainFlag
                };
            }

            packet.KeepAlivePeriod = body.ReadTwoByteInteger();

            var propertiesReader = new MqttV500PropertiesReader(body);

            while (propertiesReader.MoveNext())
            {
                if (packet.Properties == null)
                {
                    packet.Properties = new MqttConnectPacketProperties();
                }

                if (propertiesReader.CurrentPropertyId == MqttPropertyId.SessionExpiryInterval)
                {
                    packet.Properties.SessionExpiryInterval = propertiesReader.ReadSessionExpiryInterval();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.AuthenticationMethod)
                {
                    packet.Properties.AuthenticationMethod = propertiesReader.ReadAuthenticationMethod();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.AuthenticationData)
                {
                    packet.Properties.AuthenticationData = propertiesReader.ReadAuthenticationData();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ReceiveMaximum)
                {
                    packet.Properties.ReceiveMaximum = propertiesReader.ReadReceiveMaximum();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.TopicAliasMaximum)
                {
                    packet.Properties.TopicAliasMaximum = propertiesReader.ReadTopicAliasMaximum();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.MaximumPacketSize)
                {
                    packet.Properties.MaximumPacketSize = propertiesReader.ReadMaximumPacketSize();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.RequestResponseInformation)
                {
                    packet.Properties.RequestResponseInformation = propertiesReader.RequestResponseInformation();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.RequestProblemInformation)
                {
                    packet.Properties.RequestProblemInformation = propertiesReader.RequestProblemInformation();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.UserProperty)
                {
                    if (packet.Properties.UserProperties == null)
                    {
                        packet.Properties.UserProperties = new List <MqttUserProperty>();
                    }

                    propertiesReader.AddUserPropertyTo(packet.Properties.UserProperties);
                }
                else
                {
                    propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttConnectPacket));
                }
            }

            packet.ClientId = body.ReadStringWithLengthPrefix();

            if (packet.WillMessage != null)
            {
                var willPropertiesReader = new MqttV500PropertiesReader(body);

                while (willPropertiesReader.MoveNext())
                {
                    if (willPropertiesReader.CurrentPropertyId == MqttPropertyId.PayloadFormatIndicator)
                    {
                        packet.WillMessage.PayloadFormatIndicator = propertiesReader.ReadPayloadFormatIndicator();
                    }
                    else if (willPropertiesReader.CurrentPropertyId == MqttPropertyId.MessageExpiryInterval)
                    {
                        packet.WillMessage.MessageExpiryInterval = propertiesReader.ReadMessageExpiryInterval();
                    }
                    else if (willPropertiesReader.CurrentPropertyId == MqttPropertyId.TopicAlias)
                    {
                        packet.WillMessage.TopicAlias = propertiesReader.ReadTopicAlias();
                    }
                    else if (willPropertiesReader.CurrentPropertyId == MqttPropertyId.ResponseTopic)
                    {
                        packet.WillMessage.ResponseTopic = propertiesReader.ReadResponseTopic();
                    }
                    else if (willPropertiesReader.CurrentPropertyId == MqttPropertyId.CorrelationData)
                    {
                        packet.WillMessage.CorrelationData = propertiesReader.ReadCorrelationData();
                    }
                    else if (willPropertiesReader.CurrentPropertyId == MqttPropertyId.SubscriptionIdentifier)
                    {
                        if (packet.WillMessage.SubscriptionIdentifiers == null)
                        {
                            packet.WillMessage.SubscriptionIdentifiers = new List <uint>();
                        }

                        packet.WillMessage.SubscriptionIdentifiers.Add(propertiesReader.ReadSubscriptionIdentifier());
                    }
                    else if (willPropertiesReader.CurrentPropertyId == MqttPropertyId.ContentType)
                    {
                        packet.WillMessage.ContentType = propertiesReader.ReadContentType();
                    }
                    else if (willPropertiesReader.CurrentPropertyId == MqttPropertyId.WillDelayInterval)
                    {
                        // This is a special case!
                        packet.Properties.WillDelayInterval = propertiesReader.ReadWillDelayInterval();
                    }
                    else if (willPropertiesReader.CurrentPropertyId == MqttPropertyId.UserProperty)
                    {
                        if (packet.WillMessage.UserProperties == null)
                        {
                            packet.WillMessage.UserProperties = new List <MqttUserProperty>();
                        }

                        propertiesReader.AddUserPropertyTo(packet.Properties.UserProperties);
                    }
                    else
                    {
                        propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttPublishPacket));
                    }
                }

                packet.WillMessage.Topic   = body.ReadStringWithLengthPrefix();
                packet.WillMessage.Payload = body.ReadWithLengthPrefix();
            }

            if (usernameFlag)
            {
                packet.Username = body.ReadStringWithLengthPrefix();
            }

            if (passwordFlag)
            {
                packet.Password = body.ReadWithLengthPrefix();
            }

            return(packet);
        }
Ejemplo n.º 7
0
        private static MqttBasePacket DecodePublishPacket(byte header, IMqttPacketBodyReader body)
        {
            ThrowIfBodyIsEmpty(body);

            var retain = (header & 1) > 0;
            var qos    = (MqttQualityOfServiceLevel)(header >> 1 & 3);
            var dup    = (header >> 3 & 1) > 0;

            var packet = new MqttPublishPacket
            {
                Topic  = body.ReadStringWithLengthPrefix(),
                Retain = retain,
                QualityOfServiceLevel = qos,
                Dup = dup
            };

            if (qos > 0)
            {
                packet.PacketIdentifier = body.ReadTwoByteInteger();
            }

            var propertiesReader = new MqttV500PropertiesReader(body);

            while (propertiesReader.MoveNext())
            {
                if (packet.Properties == null)
                {
                    packet.Properties = new MqttPublishPacketProperties();
                }

                if (propertiesReader.CurrentPropertyId == MqttPropertyId.PayloadFormatIndicator)
                {
                    packet.Properties.PayloadFormatIndicator = propertiesReader.ReadPayloadFormatIndicator();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.MessageExpiryInterval)
                {
                    packet.Properties.MessageExpiryInterval = propertiesReader.ReadMessageExpiryInterval();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.TopicAlias)
                {
                    packet.Properties.TopicAlias = propertiesReader.ReadTopicAlias();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ResponseTopic)
                {
                    packet.Properties.ResponseTopic = propertiesReader.ReadResponseTopic();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.CorrelationData)
                {
                    packet.Properties.CorrelationData = propertiesReader.ReadCorrelationData();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.SubscriptionIdentifier)
                {
                    if (packet.Properties.SubscriptionIdentifiers == null)
                    {
                        packet.Properties.SubscriptionIdentifiers = new List <uint>();
                    }

                    packet.Properties.SubscriptionIdentifiers.Add(propertiesReader.ReadSubscriptionIdentifier());
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ContentType)
                {
                    packet.Properties.ContentType = propertiesReader.ReadContentType();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.UserProperty)
                {
                    if (packet.Properties.UserProperties == null)
                    {
                        packet.Properties.UserProperties = new List <MqttUserProperty>();
                    }

                    propertiesReader.AddUserPropertyTo(packet.Properties.UserProperties);
                }
                else
                {
                    propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttPublishPacket));
                }
            }

            if (!body.EndOfStream)
            {
                packet.Payload = body.ReadRemainingData();
            }

            return(packet);
        }
Ejemplo n.º 8
0
        private static MqttBasePacket DecodeConnAckPacket(IMqttPacketBodyReader body)
        {
            ThrowIfBodyIsEmpty(body);

            var acknowledgeFlags = body.ReadByte();

            var packet = new MqttConnAckPacket
            {
                IsSessionPresent = (acknowledgeFlags & 0x1) > 0,
                ReasonCode       = (MqttConnectReasonCode)body.ReadByte()
            };

            var propertiesReader = new MqttV500PropertiesReader(body);

            while (propertiesReader.MoveNext())
            {
                if (packet.Properties == null)
                {
                    packet.Properties = new MqttConnAckPacketProperties();
                }

                if (propertiesReader.CurrentPropertyId == MqttPropertyId.SessionExpiryInterval)
                {
                    packet.Properties.SessionExpiryInterval = propertiesReader.ReadSessionExpiryInterval();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.AuthenticationMethod)
                {
                    packet.Properties.AuthenticationMethod = propertiesReader.ReadAuthenticationMethod();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.AuthenticationData)
                {
                    packet.Properties.AuthenticationData = propertiesReader.ReadAuthenticationData();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.RetainAvailable)
                {
                    packet.Properties.RetainAvailable = propertiesReader.ReadRetainAvailable();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ReceiveMaximum)
                {
                    packet.Properties.ReceiveMaximum = propertiesReader.ReadReceiveMaximum();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.MaximumQoS)
                {
                    packet.Properties.MaximumQoS = propertiesReader.ReadMaximumQoS();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.AssignedClientIdentifier)
                {
                    packet.Properties.AssignedClientIdentifier = propertiesReader.ReadAssignedClientIdentifier();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.TopicAliasMaximum)
                {
                    packet.Properties.TopicAliasMaximum = propertiesReader.ReadTopicAliasMaximum();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ReasonString)
                {
                    packet.Properties.ReasonString = propertiesReader.ReadReasonString();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.MaximumPacketSize)
                {
                    packet.Properties.MaximumPacketSize = propertiesReader.ReadMaximumPacketSize();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.WildcardSubscriptionAvailable)
                {
                    packet.Properties.WildcardSubscriptionAvailable = propertiesReader.ReadWildcardSubscriptionAvailable();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.SubscriptionIdentifiersAvailable)
                {
                    packet.Properties.SubscriptionIdentifiersAvailable = propertiesReader.ReadSubscriptionIdentifiersAvailable();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.SharedSubscriptionAvailable)
                {
                    packet.Properties.SharedSubscriptionAvailable = propertiesReader.ReadSharedSubscriptionAvailable();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ServerKeepAlive)
                {
                    packet.Properties.ServerKeepAlive = propertiesReader.ReadServerKeepAlive();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ResponseInformation)
                {
                    packet.Properties.ResponseInformation = propertiesReader.ReadResponseInformation();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ServerReference)
                {
                    packet.Properties.ServerReference = propertiesReader.ReadServerReference();
                }
                else if (propertiesReader.CurrentPropertyId == MqttPropertyId.UserProperty)
                {
                    if (packet.Properties.UserProperties == null)
                    {
                        packet.Properties.UserProperties = new List <MqttUserProperty>();
                    }

                    propertiesReader.AddUserPropertyTo(packet.Properties.UserProperties);
                }
                else
                {
                    propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttConnAckPacket));
                }
            }

            return(packet);
        }