// pseudocode for a TCP (stream) server
   main()
   {
       s = socket()
       bind(s ...)
       listen(s ..)
       while (1) {
          newsock = accept(s ..)
          pthread_create(... connection ... )
       }
   }

   connection()
   {
       while (1) {
          read(newsock ..) // or recv
          write(newsock ..) // or send
       }
       close(newsock);
   }