From bf54bdfd7f8d53b97f47c0cbe51016f8c45940a4 Mon Sep 17 00:00:00 2001
From: Malte Janduda <mail@janduda.net>
Date: Mon, 29 Sep 2014 23:51:53 +0200
Subject: [PATCH] implementing SetInterfaceMac

Docker-DCO-1.1-Signed-off-by: Malte Janduda <mail@janduda.net> (github: MalteJ)
---
 network/network.go | 8 ++++++++
 network/types.go   | 3 +++
 network/veth.go    | 5 +++++
 3 files changed, 16 insertions(+)

diff --git a/network/network.go b/network/network.go
index c7560c04a..014ba7431 100644
--- a/network/network.go
+++ b/network/network.go
@@ -68,6 +68,14 @@ func SetDefaultGateway(ip, ifaceName string) error {
 	return netlink.AddDefaultGw(ip, ifaceName)
 }
 
+func SetInterfaceMac(name string, macaddr string) error {
+	iface, err := net.InterfaceByName(name)
+	if err != nil {
+		return err
+	}
+	return netlink.NetworkSetMacAddress(iface, macaddr)
+}
+
 func SetInterfaceIp(name string, rawIp string) error {
 	iface, err := net.InterfaceByName(name)
 	if err != nil {
diff --git a/network/types.go b/network/types.go
index ae098981b..41b7aadb5 100644
--- a/network/types.go
+++ b/network/types.go
@@ -17,6 +17,9 @@ type Network struct {
 	// Prefix for the veth interfaces.
 	VethPrefix string `json:"veth_prefix,omitempty"`
 
+	// MACAddress contains the MAC address to set on the network interface
+	MACAddress string `json:"mac_address,omitempty"`
+
 	// Address contains the IPv4 and mask to set on the network interface
 	Address string `json:"address,omitempty"`
 
diff --git a/network/veth.go b/network/veth.go
index c38fe3d2d..b9533c58f 100644
--- a/network/veth.go
+++ b/network/veth.go
@@ -60,6 +60,11 @@ func (v *Veth) Initialize(config *Network, networkState *NetworkState) error {
 	if err := ChangeInterfaceName(vethChild, defaultDevice); err != nil {
 		return fmt.Errorf("change %s to %s %s", vethChild, defaultDevice, err)
 	}
+	if config.MACAddress != "" {
+		if err := SetInterfaceMac(defaultDevice, config.MACAddress); err != nil {
+			return fmt.Errorf("set %s mac %s", defaultDevice, err)
+		}
+	}
 	if err := SetInterfaceIp(defaultDevice, config.Address); err != nil {
 		return fmt.Errorf("set %s ip %s", defaultDevice, err)
 	}