From 10c68bfb96364379346443e1a13cfd125a657393 Mon Sep 17 00:00:00 2001
From: netblue30 <netblue30@yahoo.com>
Date: Fri, 18 Sep 2015 20:04:50 -0400
Subject: fixed macvlan problem

---
 src/firejail/veth.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/firejail/veth.c b/src/firejail/veth.c
index 803d8d503..0db55709b 100644
--- a/src/firejail/veth.c
+++ b/src/firejail/veth.c
@@ -136,8 +136,14 @@ int net_create_macvlan(const char *dev, const char *parent, unsigned pid) {
 	req.n.nlmsg_type = RTM_NEWLINK;
 	req.i.ifi_family = 0;
 	
-	// we start with the parent
-	int parent_ifindex = 2;
+	// find parent ifindex
+	int parent_ifindex = if_nametoindex(parent);
+	if (parent_ifindex <= 0) {
+		fprintf(stderr, "Error: cannot find network device %s\n", parent);
+		exit(1);
+	}			
+
+	// add parent
 	addattr_l(&req.n, sizeof(req), IFLA_LINK, &parent_ifindex, 4);
 
 	// add new interface name
@@ -173,6 +179,7 @@ int net_create_macvlan(const char *dev, const char *parent, unsigned pid) {
 	return 0;
 }
 
+
 /*
 int main(int argc, char **argv) {
 	printf("Hello\n");
-- 
cgit v1.2.3-70-g09d2