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listen_socket_and_setup_epoll.c
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listen_socket_and_setup_epoll.c
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#include "main.h"
void listen_socket_and_setup_epoll() {
/* Open the server side socket */
ss = socket(PF_INET, SOCK_STREAM, 0);
if (fcntl(ss, F_SETFL, O_NONBLOCK) == -1) { close(ss); ss = -1; }
if (ss == -1) {
perror("socket");
exit(1);
}
int opt = 1;
setsockopt(ss, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof opt);
struct sockaddr_in sa;
memset(&sa, 0, sizeof sa);
sa.sin_family = PF_INET;
sa.sin_port = htons(bind_port);
inet_aton(bind_ip, &sa.sin_addr);
if (-1 == bind(ss, (struct sockaddr *) &sa, sizeof sa)) {
close(ss);
perror("bind");
exit(1);
}
if (-1 == listen(ss, 0)) {
close(ss);
perror("listen");
exit(1);
}
fcntl(0, F_SETFL, O_NONBLOCK);
/* epoll setup */
struct epoll_event ev;
memset(&ev, 0, sizeof ev);
kdpfd = epoll_create(4);
if (kdpfd == -1) {
perror("epoll_create");
exit(EXIT_FAILURE);
}
ev.events = EPOLLIN;
ev.data.fd = ss;
if (epoll_ctl(kdpfd, EPOLL_CTL_ADD, ss, &ev) == -1) {
perror("epoll_ctl: listen_sock");
exit(EXIT_FAILURE);
}
ev.events = EPOLLIN;
ev.data.fd = 0;
if (epoll_ctl(kdpfd, EPOLL_CTL_ADD, 0, &ev) == -1) {
perror("epoll_ctl: stdin");
}
}