int main(int argc, char** argv) {
// create server
int servsock;
struct sockaddr_in servaddr;
unsigned short port = argc >= 2 ? strtoport(argv[PORTNUM]) : DEFPORT;
createserver(&servsock, &servaddr, port);
printf("Server running on port %u.\n", port);
// server will begin accepting clients again after each game ends
for (EVER) {
puts("\nWaiting for players to connect...");
// wait for players to connect, then assign appropriate values
int sockarr[NUMPLAYERS];
struct sockaddr_in addrarr[NUMPLAYERS];
waitforplayers(servsock, sockarr, addrarr);
// parent will close sockets and wait for other players to connect
// child will serve the current game and then terminate
pid_t pid = fork();
if (pid < 0) {
exitwerror("fork", EXIT_ERRNO);
} else if (pid > 0) {
int i;
for (i = 0; i < NUMPLAYERS; ++i) close(sockarr[i]);
continue;
}
// notify players of their player numbers
sendplayernums(sockarr);
// inital direction values
char dirbuffer[SC_STDSIZE];
dirbuffer[PLAYER_1] = RIGHT;
dirbuffer[PLAYER_2] = LEFT;
// keep recieving and sending until a collision signal is recieved
int collided = -1;
while (collided == -1) {
sendvars(sockarr, dirbuffer); // send directions
collided = recvclientsignal(dirbuffer, sockarr); // recieve client information coming back to server socket
}
// determine winner
char winner;
switch (collided) {
case PLAYER_1: winner = PLAYER_2; break;
case PLAYER_2: winner = PLAYER_1; break;
default: winner = 3;
}
// game over, notify clients
endclients(sockarr, winner);
break;
}
return EXIT_SUCCESS;
}
int main(int argc, char *argv[])
{
socket_t servsock;
int maxfd;
fd_set readfds;
fd_set writefds;
struct timeval seltimeout;
int running = 1;
/* initially we support only one client */
socket_t clientsock = SOCKET_BAD;
(void)argc;
(void)argv;
/* Create port socket */
servsock = createserver(SERVER_PORT);
/* Initialize maxfd for use by select() */
maxfd = servsock;
while (running) {
int rc;
FD_ZERO(&readfds);
FD_ZERO(&writefds);
FD_SET(STDIN_FILENO, &readfds);
/* right now we only allow one client to connect, so when there's a client
we don't listen for new connects */
if (SOCKET_BAD != clientsock) {
FD_SET(clientsock, &readfds);
/* if there is anything to write, wait to send */
FD_SET(clientsock, &writefds);
}
else
FD_SET(servsock, &readfds);
seltimeout.tv_sec = TIMEOUT_SECS;
seltimeout.tv_usec = 0;
rc = select(maxfd + 1, &readfds, &writefds, NULL, &seltimeout);
if (!rc)
errorout("timeout expired!\n");
else {
if (FD_ISSET(STDIN_FILENO, &readfds)) {
/* read stdin and pass as data to clients */
}
if (clientsock > 0) {
if (FD_ISSET(clientsock, &readfds)) {
/* client is readable */
if (handleclient(&cl) < 0) {
sclose(clientsock);
clientsock = SOCKET_BAD;
}
}
if (FD_ISSET(clientsock, &writefds)) {
/* client is writeable */
}
}
if (FD_ISSET(servsock, &readfds)) {
printf("New client connects on port %d - assume fine TLS-NPN",
SERVER_PORT);
clientsock = acceptclient(servsock);
/* create a spindly handle for the physical connection */
cl.phys_server = spindly_phys_init(SPINDLY_SIDE_SERVER,
SPINDLY_DEFAULT, NULL);
cl.sock = clientsock; /* store the socket */
maxfd = clientsock;
}
}
}
/* Close server socket */
sclose(servsock);
exit(0);
}