wgengine/windows: use new winipcfg.Sync{Addresses,Routes} functions.

This avoids flushing and reloading the whole list of addresses and
routes whenever remote node information changes.

go.mod

@@ -17,7 +17,7 @@ require (
 	github.com/mdlayher/netlink v1.1.0
 	github.com/pborman/getopt v0.0.0-20190409184431-ee0cd42419d3
 	github.com/peterbourgon/ff/v2 v2.0.0
-	github.com/tailscale/winipcfg-go v0.0.0-20200213045944-185b07f8233f
+	github.com/tailscale/winipcfg-go v0.0.0-20200413171540-609dcf2df55f
 	github.com/tailscale/wireguard-go v0.0.0-20200407164751-7f0c43dd1145
 	github.com/toqueteos/webbrowser v1.2.0
 	go4.org/mem v0.0.0-20200411205429-f77f31c81751
@@ -30,3 +30,4 @@ require (
 	gortc.io/stun v1.22.1
 	rsc.io/goversion v1.2.0
 )
+

go.sum

@@ -79,6 +79,8 @@ github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJy
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/tailscale/winipcfg-go v0.0.0-20200213045944-185b07f8233f h1:q2ynfOHxHaaMnkZ1YHswWeO6wEk7IyOnkFozytZ1ztc=
 github.com/tailscale/winipcfg-go v0.0.0-20200213045944-185b07f8233f/go.mod h1:x880GWw5fvrl2DVTQ04ttXQD4DuppTt1Yz6wLibbjNE=
+github.com/tailscale/winipcfg-go v0.0.0-20200413171540-609dcf2df55f h1:uFj5bslHsMzxIM8UTjAhq4VXeo6GfNW91rpoh/WMJaY=
+github.com/tailscale/winipcfg-go v0.0.0-20200413171540-609dcf2df55f/go.mod h1:x880GWw5fvrl2DVTQ04ttXQD4DuppTt1Yz6wLibbjNE=
 github.com/tailscale/wireguard-go v0.0.0-20200407164751-7f0c43dd1145 h1:n/ErEski7q1+ew00eaoiCmyx/5Wtf9nKBhWYLsmID/U=
 github.com/tailscale/wireguard-go v0.0.0-20200407164751-7f0c43dd1145/go.mod h1:JPm5cTfu1K+qDFRbiHy0sOlHUylYQbpl356sdYFD8V4=
 github.com/toqueteos/webbrowser v1.2.0 h1:tVP/gpK69Fx+qMJKsLE7TD8LuGWPnEV71wBN9rrstGQ=

wgengine/ifconfig_windows.go

@@ -326,7 +326,7 @@ func configureInterface(m *wgcfg.Config, tun *tun.NativeTun, dns []wgcfg.IP, dns
 		}
 	}
 
-	err = iface.SetAddresses(addresses)
+	err = iface.SyncAddresses(addresses)
 	if err != nil {
 		return err
 	}
@@ -355,7 +355,7 @@ func configureInterface(m *wgcfg.Config, tun *tun.NativeTun, dns []wgcfg.IP, dns
 	log.Printf("routes: %v\n", routes)
 
 	var errAcc error
-	err = iface.SetRoutes(deduplicatedRoutes)
+	err = iface.SyncRoutes(deduplicatedRoutes)
 	if err != nil && errAcc == nil {
 		log.Printf("setroutes: %v\n", err)
 		errAcc = err