franta-hg@28: #include <string.h>
franta-hg@28: #include <errno.h>
franta-hg@28: #include <stdio.h>
franta-hg@28: #include <signal.h>
franta-hg@28: 
franta-hg@28: #include <event2/bufferevent.h>
franta-hg@28: #include <event2/buffer.h>
franta-hg@28: #include <event2/listener.h>
franta-hg@28: #include <event2/util.h>
franta-hg@28: #include <event2/event.h>
franta-hg@28: 
franta-hg@28: static const char MESSAGE[] = "Hello, World!\n";
franta-hg@28: 
franta-hg@28: static const int PORT = 9995;
franta-hg@28: 
franta-hg@28: static void listener_cb(struct evconnlistener *, evutil_socket_t,
franta-hg@28: 		struct sockaddr *, int socklen, void *);
franta-hg@28: static void conn_write_cb(struct bufferevent *, void *);
franta-hg@28: static void conn_event_cb(struct bufferevent *, short, void *);
franta-hg@28: static void signal_cb(evutil_socket_t, short, void *);
franta-hg@28: 
franta-hg@28: int main(int argc, char **argv) {
franta-hg@28: 	struct event_base *base;
franta-hg@28: 	struct evconnlistener *listener;
franta-hg@28: 	struct event *signal_event;
franta-hg@28: 
franta-hg@28: 	struct sockaddr_in sin;
franta-hg@28: 
franta-hg@28: 	base = event_base_new();
franta-hg@28: 	if (!base) {
franta-hg@28: 		fprintf(stderr, "Could not initialize libevent!\n");
franta-hg@28: 		return 1;
franta-hg@28: 	}
franta-hg@28: 
franta-hg@28: 	memset(&sin, 0, sizeof (sin));
franta-hg@28: 	sin.sin_family = AF_INET;
franta-hg@28: 	sin.sin_port = htons(PORT);
franta-hg@28: 
franta-hg@28: 	listener = evconnlistener_new_bind(base, listener_cb, (void *) base,
franta-hg@28: 			LEV_OPT_REUSEABLE | LEV_OPT_CLOSE_ON_FREE, -1,
franta-hg@28: 			(struct sockaddr*) &sin,
franta-hg@28: 			sizeof (sin));
franta-hg@28: 
franta-hg@28: 	if (!listener) {
franta-hg@28: 		fprintf(stderr, "Could not create a listener!\n");
franta-hg@28: 		return 1;
franta-hg@28: 	}
franta-hg@28: 
franta-hg@28: 	signal_event = evsignal_new(base, SIGINT, signal_cb, (void *) base);
franta-hg@28: 
franta-hg@28: 	if (!signal_event || event_add(signal_event, NULL) < 0) {
franta-hg@28: 		fprintf(stderr, "Could not create/add a signal event!\n");
franta-hg@28: 		return 1;
franta-hg@28: 	}
franta-hg@28: 
franta-hg@28: 	event_base_dispatch(base);
franta-hg@28: 
franta-hg@28: 	evconnlistener_free(listener);
franta-hg@28: 	event_free(signal_event);
franta-hg@28: 	event_base_free(base);
franta-hg@28: 
franta-hg@28: 	printf("done\n");
franta-hg@28: 	return 0;
franta-hg@28: }
franta-hg@28: 
franta-hg@28: static void listener_cb(struct evconnlistener *listener, evutil_socket_t fd, struct sockaddr *sa, int socklen, void *user_data) {
franta-hg@28: 	struct event_base *base = (event_base *) user_data;
franta-hg@28: 	struct bufferevent *bev;
franta-hg@28: 
franta-hg@28: 	bev = bufferevent_socket_new(base, fd, BEV_OPT_CLOSE_ON_FREE); // zavírá spojení
franta-hg@28: 	//bev = bufferevent_socket_new(base, fd, 0); // nezavírá spojení
franta-hg@28: 	if (!bev) {
franta-hg@28: 		fprintf(stderr, "Error constructing bufferevent!");
franta-hg@28: 		event_base_loopbreak(base);
franta-hg@28: 		return;
franta-hg@28: 	}
franta-hg@28: 	bufferevent_setcb(bev, NULL, conn_write_cb, conn_event_cb, NULL);
franta-hg@28: 	bufferevent_enable(bev, EV_WRITE);
franta-hg@28: 	bufferevent_disable(bev, EV_READ);
franta-hg@28: 
franta-hg@28: 	printf("někdo se k nám připojil! / %p\n", bev);
franta-hg@28: 
franta-hg@28: 	bufferevent_write(bev, MESSAGE, strlen(MESSAGE));
franta-hg@28: }
franta-hg@28: 
franta-hg@28: static void conn_write_cb(struct bufferevent *bev, void *user_data) {
franta-hg@28: 	struct evbuffer *output = bufferevent_get_output(bev);
franta-hg@28: 	if (evbuffer_get_length(output) == 0) {
franta-hg@28: 		printf("flushed answer / %p\n", bev);
franta-hg@28: 		bufferevent_free(bev);
franta-hg@28: 	}
franta-hg@28: }
franta-hg@28: 
franta-hg@28: static void conn_event_cb(struct bufferevent *bev, short events, void *user_data) {
franta-hg@28: 	if (events & BEV_EVENT_EOF) {
franta-hg@28: 		printf("Connection closed.\n");
franta-hg@28: 	} else if (events & BEV_EVENT_ERROR) {
franta-hg@28: 		printf("Got an error on the connection: %s\n",
franta-hg@28: 				strerror(errno)); /*XXX win32*/
franta-hg@28: 	}
franta-hg@28: 	
franta-hg@28: 	// None of the other events can happen here, since we haven't enabled timeouts
franta-hg@28: 	bufferevent_free(bev);
franta-hg@28: }
franta-hg@28: 
franta-hg@28: static void signal_cb(evutil_socket_t sig, short events, void *user_data) {
franta-hg@28: 	struct event_base *base = (event_base *) user_data;
franta-hg@28: 	struct timeval delay = {2, 123};
franta-hg@28: 
franta-hg@28: 	printf("Zachycen SIGINT (Ctrl+C); ukončuji program během %ld sekund a %ld mikrosekund.\n", delay.tv_sec, delay.tv_usec);
franta-hg@28: 
franta-hg@28: 	event_base_loopexit(base, &delay);
franta-hg@28: }