netapp hw3

Build

$ make clean all

Usage:

Server:

./server
Server is listening on [::]:1234

Client:

./client
[B023040025 @ hw3]$ help
usage 1: connect [IP] [PORT] [username]
usage 2: chat [username] [message]
usage 3: chat {[username1] [username2] ...} [message]
usage 4: bye

Program Introduction

• Server

  • Use "select" to handle which socket descriptor has been changed.
  • Create a "linke-list" to save each client's information.
  • Use this list to handle messages exchange between clients.

• IPC Server

  • Create a "shared memory" (size = MAX_USERS defined at ipc_user.h) to save each client's information.
  • Use semaphore to lock/unlock when read/write shared memory.
  • After successfully login, Fork a new process to handle messages exchange between clients.
  • For each child process, create a thread to monitor the shared memory.

• Client

  • Connect to Server. (IP: localhost or 127.0.0.1 or ::1, PORT: 1234 )
  • Get User's command and do corresponding actions.
  • Create a thread to receive messages send from the server(othrer clients).