Handler definition for the tunnel location resolution.
This handler is used by the TUNNEL implementation to provide a way to the user space code to translate tunnel locations provided.
Currently this is used by Turbulence to provide run-time translation for endpoint and profile configurations into host and port locations.
|tunnel_spec ||The xml string defining the tunnel spec as defined in RFC3620.|
|tunnel_sepc_size ||The size of the xml content.|
|user_data ||Reference to user defined data.|
|doc ||A reference to an already parsed document.|
- A reference to the VortexTunnelSettings created with the new values. If null reference is returned, the TUNNEL engine will use the content as provided, without performing any translation.