From 00b072dd0b13395272df1ff4fc9ec58baaf42d1f Mon Sep 17 00:00:00 2001
From: Casey Callendrello <casey.callendrello@coreos.com>
Date: Wed, 11 Apr 2018 15:03:04 +0200
Subject: [PATCH] pkg/ip: re-fetch the created link to return creation-time
 parameters

Fixes: #140
---
 pkg/ip/link_linux.go | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/pkg/ip/link_linux.go b/pkg/ip/link_linux.go
index 843ce8aa..3e5724ea 100644
--- a/pkg/ip/link_linux.go
+++ b/pkg/ip/link_linux.go
@@ -42,8 +42,14 @@ func makeVethPair(name, peer string, mtu int) (netlink.Link, error) {
 	if err := netlink.LinkAdd(veth); err != nil {
 		return nil, err
 	}
+	// Re-fetch the link to get its creation-time parameters, e.g. index and mac
+	veth2, err := netlink.LinkByName(name)
+	if err != nil {
+		netlink.LinkDel(veth) // try and clean up the link if possible.
+		return nil, err
+	}
 
-	return veth, nil
+	return veth2, nil
 }
 
 func peerExists(name string) bool {