# HG changeset patch
# User František Kučera <franta-hg@frantovo.cz>
# Date 1479506822 -3600
# Node ID 9c0f52aa4772159072b7fa6d189a66055bc7ce90
# Parent  1fec66105b8eea64e34ba13c0a484beeafa3358e
libevent: unixové sokety místo TCP

diff -r 1fec66105b8e -r 9c0f52aa4772 c++/domain-socket-bridge/domain-socket-bridge.c
--- a/c++/domain-socket-bridge/domain-socket-bridge.c	Fri Nov 18 21:41:23 2016 +0100
+++ b/c++/domain-socket-bridge/domain-socket-bridge.c	Fri Nov 18 23:07:02 2016 +0100
@@ -8,10 +8,12 @@
 #include <event2/listener.h>
 #include <event2/util.h>
 #include <event2/event.h>
+#include <sys/un.h>
+#include <unistd.h>
 
 static const char MESSAGE[] = "Hello, World!\n";
 
-static const int PORT = 9995;
+static const char PATH[] = "./roura";
 
 static void listener_cb(struct evconnlistener *, evutil_socket_t,
 		struct sockaddr *, int socklen, void *);
@@ -24,7 +26,7 @@
 	struct evconnlistener *listener;
 	struct event *signal_event;
 
-	struct sockaddr_in sin;
+	struct sockaddr_un sun;
 
 	base = event_base_new();
 	if (!base) {
@@ -32,17 +34,17 @@
 		return 1;
 	}
 
-	memset(&sin, 0, sizeof (sin));
-	sin.sin_family = AF_INET;
-	sin.sin_port = htons(PORT);
+	memset(&sun, 0, sizeof (sun));
+	sun.sun_family = AF_UNIX;
+	strcpy(sun.sun_path, PATH);
 
 	listener = evconnlistener_new_bind(base, listener_cb, (void *) base,
 			LEV_OPT_REUSEABLE | LEV_OPT_CLOSE_ON_FREE, -1,
-			(struct sockaddr*) &sin,
-			sizeof (sin));
+			(struct sockaddr*) &sun,
+			sizeof (sun));
 
 	if (!listener) {
-		fprintf(stderr, "Could not create a listener!\n");
+		fprintf(stderr, "Could not create domain socket: %s!\n", PATH);
 		return 1;
 	}
 
@@ -58,6 +60,9 @@
 	evconnlistener_free(listener);
 	event_free(signal_event);
 	event_base_free(base);
+	
+	// smažeme soket na disku / soubor -- jinak by program příště spadl na evconnlistener_new_bind()
+	unlink(PATH);
 
 	printf("done\n");
 	return 0;
@@ -96,9 +101,9 @@
 		printf("Connection closed.\n");
 	} else if (events & BEV_EVENT_ERROR) {
 		printf("Got an error on the connection: %s\n",
-				strerror(errno)); /*XXX win32*/
+				strerror(errno));
 	}
-	
+
 	// None of the other events can happen here, since we haven't enabled timeouts
 	bufferevent_free(bev);
 }