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 DecodeUnsubAckPacket(ArraySegment <byte> body)
{
ThrowIfBodyIsEmpty(body);
_bufferReader.SetBuffer(body.Array, body.Offset, body.Count);
var packet = new MqttUnsubAckPacket
{
PacketIdentifier = _bufferReader.ReadTwoByteInteger()
};
var propertiesReader = new MqttV5PropertiesReader(_bufferReader);
while (propertiesReader.MoveNext())
{
if (propertiesReader.CurrentPropertyId == MqttPropertyId.ReasonString)
{
packet.ReasonString = propertiesReader.ReadReasonString();
}
else
{
propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttUnsubAckPacket));
}
}
packet.UserProperties = propertiesReader.CollectedUserProperties;
packet.ReasonCodes = new List <MqttUnsubscribeReasonCode>(_bufferReader.BytesLeft);
while (!_bufferReader.EndOfStream)
{
var reasonCode = (MqttUnsubscribeReasonCode)_bufferReader.ReadByte();
packet.ReasonCodes.Add(reasonCode);
}
return(packet);
}
MqttPacket DecodeDisconnectPacket(ArraySegment <byte> body)
{
ThrowIfBodyIsEmpty(body);
_bufferReader.SetBuffer(body.Array, body.Offset, body.Count);
var packet = new MqttDisconnectPacket
{
ReasonCode = (MqttDisconnectReasonCode)_bufferReader.ReadByte()
};
var propertiesReader = new MqttV5PropertiesReader(_bufferReader);
while (propertiesReader.MoveNext())
{
if (propertiesReader.CurrentPropertyId == MqttPropertyId.SessionExpiryInterval)
{
packet.SessionExpiryInterval = propertiesReader.ReadSessionExpiryInterval();
}
else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ReasonString)
{
packet.ReasonString = propertiesReader.ReadReasonString();
}
else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ServerReference)
{
packet.ServerReference = propertiesReader.ReadServerReference();
}
else
{
propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttDisconnectPacket));
}
}
packet.UserProperties = propertiesReader.CollectedUserProperties;
return(packet);
}
MqttPacket DecodePubRelPacket(ArraySegment <byte> body)
{
ThrowIfBodyIsEmpty(body);
_bufferReader.SetBuffer(body.Array, body.Offset, body.Count);
var packet = new MqttPubRelPacket
{
PacketIdentifier = _bufferReader.ReadTwoByteInteger()
};
if (_bufferReader.EndOfStream)
{
packet.ReasonCode = MqttPubRelReasonCode.Success;
return(packet);
}
packet.ReasonCode = (MqttPubRelReasonCode)_bufferReader.ReadByte();
var propertiesReader = new MqttV5PropertiesReader(_bufferReader);
while (propertiesReader.MoveNext())
{
if (propertiesReader.CurrentPropertyId == MqttPropertyId.ReasonString)
{
packet.ReasonString = propertiesReader.ReadReasonString();
}
else
{
propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttPubRelPacket));
}
}
packet.UserProperties = propertiesReader.CollectedUserProperties;
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);
}