From 3a7c144e9992591f32daf2d4f1b35b7b6520a07e Mon Sep 17 00:00:00 2001
From: Tianon Gravi <admwiggin@gmail.com>
Date: Sun, 9 Feb 2014 18:12:43 -0700
Subject: [PATCH] Update NetworkChangeName to be more similar to my original
 (moving IFNAMSIZ constant outside the function like it should've been)

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)
---
 pkg/netlink/netlink_linux.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/pkg/netlink/netlink_linux.go b/pkg/netlink/netlink_linux.go
index 46bd3d8373..b94cbf6822 100644
--- a/pkg/netlink/netlink_linux.go
+++ b/pkg/netlink/netlink_linux.go
@@ -662,15 +662,17 @@ func getIfSocket() (int, error) {
 	return -1, sErr
 }
 
+// from <net/if.h>
+const IFNAMSIZ = 16
+
 func NetworkChangeName(oldName, newName string) error {
 	fd, err := getIfSocket()
 	if err != nil {
 		return err
 	}
 	defer syscall.Close(fd)
-	IFNAMSIZ := 16
 
-	data := [32]byte{}
+	data := [IFNAMSIZ * 2]byte{}
 	copy(data[:IFNAMSIZ-1], oldName)
 	copy(data[IFNAMSIZ:IFNAMSIZ*2-1], newName)