From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Sat, 18 Jan 2014 21:15:16 +0100
Subject: alfred: fix socket fd leak

diff --git a/alfred/patches/0002-batadv-vis-don-t-leak-socket-fd-in-get_if_mac.patch b/alfred/patches/0002-batadv-vis-don-t-leak-socket-fd-in-get_if_mac.patch
new file mode 100644
index 0000000..2374e25
--- /dev/null
+++ b/alfred/patches/0002-batadv-vis-don-t-leak-socket-fd-in-get_if_mac.patch
@@ -0,0 +1,39 @@
+From 449b94ee85a42fbabec550d920002ad07738e733 Mon Sep 17 00:00:00 2001
+Message-Id: <449b94ee85a42fbabec550d920002ad07738e733.1390075976.git.mschiffer@universe-factory.net>
+From: Matthias Schiffer <mschiffer@universe-factory.net>
+Date: Sat, 18 Jan 2014 21:04:05 +0100
+Subject: [PATCH] batadv-vis: don't leak socket fd in get_if_mac()
+
+Leaking an fd every time get_if_mac() is called causes a batadv-vis server
+process to hit the open file limit in a matter of hours when there are many
+active interfaces and the limit is as low as 1024 (which it is on OpenWRT).
+
+Reported-by: Jan-Philipp Litza <janphilipp@litza.de>
+Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
+---
+ vis/vis.c | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+--- a/vis/vis.c
++++ b/vis/vis.c
+@@ -97,6 +97,7 @@ static int get_if_mac(char *ifname, uint
+ {
+ 	struct ifreq ifr;
+ 	int sock;
++	int ret;
+ 
+ 	strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
+ 
+@@ -105,7 +106,11 @@ static int get_if_mac(char *ifname, uint
+ 		return -1;
+ 	}
+ 
+-	if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) {
++	ret = ioctl(sock, SIOCGIFHWADDR, &ifr);
++
++	close(sock);
++
++	if (ret == -1) {
+ 		fprintf(stderr, "can't get MAC address: %s\n", strerror(errno));
+ 		return -1;
+ 	}