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);
}