NFD » ndn-tools

Refactor ndnpingserver program to use the following structure:

           |------------|
   Face <- |            | -> Tracer
           | PingServer |
Options -> |
           |------------|

• An Options POD struct contains parameters parsed from command line.
• PingServer class constructor should take Face& and Options as argument; getter/setter for each option are deleted from the class.
• PingServer::run returns when expected number of Interests are processed (if a limit is specified in Options).
• PingServer class shouldn't write to stdout directly; instead, it emits a signal for each processed Interest.
• A Tracer class connects to the signals, and writes logs for each processed Interest.

Benefits:

• separate responsibility: PingServer performs network operations, Tracer writes logs.
• unit testing: passing DummyClientFace to Ping constructor allows unit testing.
• simulation: PingServer can be reused in a ndnSIM scenario.