Linux Socket in C multiplethreads

• SA16225108
• Author: huangshuaishuai
• Specification:
  • 'make' First before each test
  • run the 'server' firstly
  • 'each message add a character to tag the target client it chatting with'
  • client0 and client1 chat in unicast
  • client broadcast to all the client connected to the server
• more specfication in comments will help you to understand

####### Need To Improvement for Tcp connection

• client read and write need 'mutex' or 'lock' to exclusive
• server need to a 'message buffer' or 'log' to cahche to message send to client who is off-line