int main(void)
{
int h = 0;
int f = 1;
int clientfd, maxfd, nready, i, result;
socklen_t len;
struct sockaddr_in q;
fd_set allset, rset;
struct queue_list *clientlist = q_init(); //client fds
struct queue_list *battlelist = q_init(); //battles
struct queue_list *playerlist = q_init(); //players w/ stats, name etc.
int listenfd = bindandlisten();
maxfd = listenfd;
FD_ZERO(&allset);
FD_SET(listenfd, &allset);
while (1)
{
printf("server on %d iteration\n", h);
h++;
if (f == 1)
{
printf("server initialized! \n");
f++;
}
rset = allset;
struct node *bb = battlelist->front;
while (bb)
{
if (bb->content->status == 0)
{
battle_end(bb->content, playerlist, 0);
}
bb = bb->next;
}
printf("attempting to create matches: ");
if (matchmaking(playerlist, battlelist) == 1)//find match for two clients each iteration
{
printf("Battle created with pid %d !\n", bid);
bid = bid + 1;
}
nready = select(maxfd + 1, &rset, NULL, NULL, NULL); //check if there is any client active
if (nready == 0) // if no client is active
{
continue; //go back to the beginning.
}
else if (nready == -1) //error
{
perror("select");
continue;
}
if (FD_ISSET(listenfd, &rset)) //check if listenfd active that connected by any client
{
printf("a new client is connecting\n");
len = sizeof(q);
if ((clientfd = accept(listenfd, (struct sockaddr *)&q, &len)) < 0) //accept the client, *i think* it will reset listenfd to inactive
{
perror("accept");
exit(1);
}
FD_SET(clientfd, &allset); //add the client fd in to the set of fd
write(clientfd, "What is your name?\r\n", 20);
if (clientfd > maxfd)
{
maxfd = clientfd; //update max # of fd if needed
}
printf("connection from %s\n", inet_ntoa(q.sin_addr));
addclient(clientfd, q.sin_addr, clientlist);
}
struct node *p;
for(i = 0; i <= maxfd; i++) //iterate through fd set and
{
if (FD_ISSET(i, &rset)) //check each connected client fd in the set of fd, if anyone becomes active.
{
for (p = clientlist->front; p != NULL; p = p->next) //TODO: change this for new data structure
{
if (p->content->fd == i)
{
result = handle(clientlist, playerlist, p->content);
if (result == -1 || result == 5)
{
if (result == 5)
{
bid = battle_end(p->content->player, playerlist, 1);
printf("battle %d drops due to client disconnected\n", bid);
}
int tmp_fd = p->fd;
removeclient(p->content, clientlist);
FD_CLR(tmp_fd, &allset);
close(tmp_fd);
}
break;
}
}
}
}
}
}
int main(void) {
int clientfd, maxfd, nready;
struct client *p;
struct client *head = NULL;
socklen_t len;
struct sockaddr_in q;
struct timeval tv;
fd_set allset;
fd_set rset;
srand (time(NULL));
int i;
//Initialize a listening fd of the server.
int listenfd = bindandlisten();
// initialize allset and add listenfd to the
// set of file descriptors passed into select
FD_ZERO(&allset);
FD_SET(listenfd, &allset);
// maxfd identifies how far into the set to search
maxfd = listenfd;
while (1) {//keep running
// make a copy of the set before we pass it into select
rset = allset;
/* timeout in seconds (You may not need to use a timeout for
* your assignment)*/
tv.tv_sec = 2; // change to 0 from 10
tv.tv_usec = 0; /* and microseconds */
nready = select(maxfd + 1, &rset, NULL, NULL, &tv); //Select a ready fd descriptor(client) to read.
if (nready == 0) {
printf("No response from clients in %ld seconds\n", tv.tv_sec);
continue;
}
if (nready == -1) {
perror("select");
continue;
}
if (FD_ISSET(listenfd, &rset)) {
printf("a new client is connecting\n");
len = sizeof(q);
if ((clientfd = accept(listenfd, (struct sockaddr *)&q, &len)) < 0) {
perror("accept");
exit(1);
}
FD_SET(clientfd, &allset);
if (clientfd > maxfd) {
maxfd = clientfd;
}
printf("connection from %s\n", inet_ntoa(q.sin_addr));
//sprintf("what is your name?");
head = addclient(head, clientfd, q.sin_addr);
}
//Handle every client
//printf("running\n");
for(i = 0; i <= maxfd; i++) {
if (FD_ISSET(i, &rset)) {
for (p = head; p != NULL; p = p->next) {
if (p->fd == i) {//
int result = handleclient(p, head);
if (result == -1) {
int tmp_fd = p->fd;
head = removeclient(head, p->fd);
FD_CLR(tmp_fd, &allset);
close(tmp_fd);
}
break;
}
}
}
}
}
return 0;
}