Zepiao Han

Xuanyi Li

tictactoeServer.c and tictactoeClient.c are source C files.
makefile the file to compile and run C program.
prtocolUtilUDP.c and protocolUtilUDP.h are utility to handle the protocol.
tictactoeUtil.h and tictactoeUtil.c are utility to handle the game board.

Multiple servers play with multiple client, including three major phases: init handshake (game creation or reconnection), play, end handshake (acknowledge win or draw).

Fault tolerant to server crash: clients could find available servers and seamlessly recover from the interrupted point.

Servers validate the packet, evict out of time games, reject overwhelmed request of game creation and reconnection.

Clients make pollings to find available servers.

MAX GAME = 3. (Macro Name: MAXGAME, Location tictactoeServer.c)

port number should falls into the range [1024, 65535].

tcp timeout unit is set to 15s for game play. (Global Variable Name: TIMEOUT, Location: protocolUtil.c)

multicast timeout is set to 10s and polling times is set to 3 at client end. (Macro Name: MLTTIMEOUT, RETRYTIMES, Location: tictactoeClient.c)

Multicast Address: MC_PORT = 1818, MC_GROUP = 239.0.0.1

Step 1 Initialize

make clean

Step 2: Compile all source codes

make

Step 3: Get server ip address at Server side.

hostname -I

Step 4: Start server program at Server side.

./server <server port>

Step 5: Start one or more client programs to send move at Client side.

./client <server port> <server ip>

Step 6: Stop the server by typing Ctrl c at Server side.