Base class for the configuration info classes. It is outside the scope of all the Packet data classes.

To allow future connection information structures (e.g. TConnectionInfoV2, TConnectionInfoV3, etc.) to be added and as a result information carried by the structure can be increased. All information structures are derived from this thin base class which provides just one function, ExtensionId() . This function returns the protected member variable, iExtensionId. A new structure would define an associated new constant to be set in iExtensionId on construction, which would then be queried by the TSY prior to unpackaging the structure.

RPacketContext::TConnectionInfoV1