The code implements a chat tool similar to windows on QQ in Linux. Socket communication is mainly based on TCP/IP protocol. Including server and client two parts, in which the client uses the select IO multiplexing technology, the server side to monitor a number of clients, so the use of epoll IO multiplexing technology. The functions of the whole project can be registered and logged by users, add friends, send chat messages, send and receive files, etc..

linux_qq\.gitignore
linux_qq\client\client.cpp
linux_qq\client\fsocket.cpp
linux_qq\client\fsocket.h
linux_qq\client\makefile
linux_qq\client\user_input_util.cpp
linux_qq\client\user_input_util.h
linux_qq\const.cpp
linux_qq\const.h
linux_qq\images\cxjg.png
linux_qq\msg_buffer.cpp
linux_qq\msg_buffer.h
linux_qq\msg_util.cpp
linux_qq\msg_util.h
linux_qq\README.md
linux_qq\ring_queue.cpp
linux_qq\ring_queue.h
linux_qq\server\db.cpp
linux_qq\server\db.h
linux_qq\server\friendship
linux_qq\server\makefile
linux_qq\server\registed
linux_qq\server\server.cpp
linux_qq\server\service.cpp
linux_qq\server\service.h
linux_qq\util.cpp
linux_qq\util.h
linux_qq\client
linux_qq\images
linux_qq\server
linux_qq

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