tailscale/wgengine/router_windows.go

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// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package wgengine
import (
"log"
"github.com/tailscale/wireguard-go/device"
"github.com/tailscale/wireguard-go/tun"
"golang.zx2c4.com/winipcfg"
"tailscale.com/logger"
)
type winRouter struct {
logf func(fmt string, args ...interface{})
tunname string
dev *device.Device
nativeTun *tun.NativeTun
routeChangeCallback *winipcfg.RouteChangeCallback
}
func NewUserspaceRouter(logf logger.Logf, tunname string, dev *device.Device, tuntap tun.Device, netChanged func()) Router {
r := winRouter{
logf: logf,
tunname: tunname,
dev: dev,
nativeTun: tuntap.(*tun.NativeTun),
}
return &r
}
func (r *winRouter) Up() error {
// MonitorDefaultRoutes handles making sure our wireguard UDP
// traffic goes through the old route, not recursively through the VPN.
var err error
r.routeChangeCallback, err = MonitorDefaultRoutes(r.dev, true, r.nativeTun)
if err != nil {
log.Fatalf("MonitorDefaultRoutes: %v\n", err)
}
return nil
}
func (r *winRouter) SetRoutes(rs RouteSettings) error {
err := ConfigureInterface(&rs.Cfg, r.nativeTun, rs.DNS, rs.DNSDomains)
if err != nil {
r.logf("ConfigureInterface: %v\n", err)
return err
}
return nil
}
func (r *winRouter) Close() {
if r.routeChangeCallback != nil {
r.routeChangeCallback.Unregister()
}
}