Files start with 'test' or 'Test' are all test codes. The compiler is g++4.7， the netlib use something in C++11，such as std::function and std::bind, std::shared_ptr. You also need gooble protobuf to run the test code. You can try typing 'make testprotoclient' and 'make testprotoserver', and then run the program 'testprotoclient' and 'testprotoserver', I changed to use shared_ptr recently, some of the code still using 'malloc' or 'new', need fix.