From cf315fb6baea2aa3cbc26e0254574da02ec90af8 Mon Sep 17 00:00:00 2001
From: Bryan Boreham <bjboreham@gmail.com>
Date: Fri, 9 Dec 2016 13:13:45 +0000
Subject: [PATCH] Take peerName from weave bridge if not specified

---
 prog/weaver/main.go | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/prog/weaver/main.go b/prog/weaver/main.go
index 2050f49e..2d47a8fb 100644
--- a/prog/weaver/main.go
+++ b/prog/weaver/main.go
@@ -232,7 +232,7 @@ func main() {
 		}
 	}
 
-	name := peerName(routerName, bridge.Interface())
+	name := peerName(routerName)
 
 	if nickName == "" {
 		var err error
@@ -528,10 +528,11 @@ func determinePassword(password string) []byte {
 	return []byte(password)
 }
 
-func peerName(routerName string, iface *net.Interface) mesh.PeerName {
+func peerName(routerName string) mesh.PeerName {
 	if routerName == "" {
-		if iface == nil {
-			Log.Fatal("Either an interface must be specified with --datapath or --iface, or a name with --name")
+		iface, err := net.InterfaceByName(weavenet.WeaveBridgeName)
+		if err != nil {
+			Log.Fatalf("Unable to find bridge %q", weavenet.WeaveBridgeName)
 		}
 		routerName = iface.HardwareAddr.String()
 	}