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1. C back-end infrastructure
   This allows for the setup of the TCP communication between the Master and Agent nodes (lutf.c).  

   
   

   1. Master mode:

      1. Starts a listener thread to listen to Agent connections (lutf_listener.c).

      2. Maintains a list of the Agents
      3. Start up a python interpreter (lutf_python.c).

      4. Provides a library which is SWIG wrapped and callable from python scripts (liblutf_agent.c).

   2. Agent mode:

      1. A thread is started to maintain a heart beat with the master. The master uses the Heart beat to determine the aliveness of the agents (lutf.c).
      2. Start up a python interpreter through Telnet (lutf_python.c).

    

2. Python Test infrastructure
   
   
   1. Infrastructure Level 1:
      A python master script for this infrastructure would facilitate the following:
      1. Deploy LUTF on all the Agent nodes and Master node.
      2. Provides a telnet server and client for Master<->Agent communication.
      3. Provides a mechanism to query IP addresses and the network interfaces (NIs) on the Agents. This information can further be fetched by the test scripts on demand using an API.
      4. Facilitates running individual python tests scripts on the Agents and collecting results.
      5. Facilitates running the auto-test script which is a test-suite of all the test scripts related to one particular feature.
      6. Facilitate synchronization between the tests running on different Agents . by providing an API that uses notification mechanism. An example scenario of how it would be implemented is - as a test script runs to it completion on an Agent, it would notify the Master about its status by calling this API and then Master can redirect this event to any script waiting on it.
   2. Infrastructure Level 2:
      With its implementation, the functions which are used by multiple test scripts are defined in a base test infrastructure file (lnet_test_infra_utils.py) which is then imported in each test script. This ease out the process of writing new test scripts and avoids code redundancy.

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