Server side
define sockaddr_in
structure sockaddr_in serveraddr, clientaddr
new a socket
server_socket = socket (AF_INET, SOCK_STREAM, 0)
setup serveraddr
serveraddr.sin_family
serveraddr.sin_port
serveraddr.sin_addr.s_addr = htons(INADDR_ANY)
bind serveraddr to server_socket
bind(server_socket, (struct sockaddr *) &serveraddr, sizeof(serveraddr)
set up listen
listen(server_socket, LENGTH_OF_LISTEN_QUEUE)
server loop cycle, never exit
no need to setup in server loop
clientaddr.sin_family, clientaddr.sin_port, clientaddr.sin_addr.s_addr
client_socket is generate by accept
client_socket = accetp(server_socket, (struct sockaddr *) &clientaddr, sizeof(clientaddr))
sent some information to client
send(client_socket, buf, BUFFER_SIZE, 0)
close client_socket after send inforation to client
close(client_socket)
Client side
define sockaddr_in
struct sockaddr_in clientaddr, serveraddr
define buffer char array
char buf[BUFFER_SIZE]
new a socket
client_socket = socket(AF_INET, SOCK_STREAM, 0)
setup clientaddr
clientaddr.sin_family
clientaddr.sin_port
clientaddr.sin_addr.s_addr
setup serveraddr
serveraddr.sin_family
serveraddr.sin_port
serveraddr.sin_addr.s_addr
inet_aton(argv[1], &serveraddr.sin_addr)
serveraddr.sin_addr.s_addr = inet_aton("127.0.0.1")
bind clientaddr to client_socket
bind(client_socket, (struct sockaddr*)&clientaddr, sizeof(clientaddr))
connect client_socket to serveraddr
connect(client_socket, (struct sockaddr*)&serveraddr, sizeof(serveraddr))
receive information from server side
recv(client_socket, buf, BUFFER_SIZE, 0)