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tailscale/wgengine/router/router_windows.go

91 lines
2.1 KiB
Go

// 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 router
import (
"fmt"
"log"
winipcfg "github.com/tailscale/winipcfg-go"
"github.com/tailscale/wireguard-go/device"
"github.com/tailscale/wireguard-go/tun"
"tailscale.com/types/logger"
"tailscale.com/wgengine/router/dns"
)
type winRouter struct {
logf func(fmt string, args ...interface{})
tunname string
nativeTun *tun.NativeTun
wgdev *device.Device
routeChangeCallback *winipcfg.RouteChangeCallback
dns *dns.Manager
}
func newUserspaceRouter(logf logger.Logf, wgdev *device.Device, tundev tun.Device) (Router, error) {
tunname, err := tundev.Name()
if err != nil {
return nil, err
}
nativeTun := tundev.(*tun.NativeTun)
guid := nativeTun.GUID().String()
mconfig := dns.ManagerConfig{
Logf: logf,
InterfaceName: guid,
}
return &winRouter{
logf: logf,
wgdev: wgdev,
tunname: tunname,
nativeTun: nativeTun,
dns: dns.NewManager(mconfig),
}, nil
}
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.wgdev, true, r.nativeTun)
if err != nil {
log.Fatalf("MonitorDefaultRoutes: %v\n", err)
}
return nil
}
func (r *winRouter) Set(cfg *Config) error {
if cfg == nil {
cfg = &shutdownConfig
}
err := configureInterface(cfg, r.nativeTun)
if err != nil {
r.logf("ConfigureInterface: %v\n", err)
return err
}
if err := r.dns.Set(cfg.DNS); err != nil {
return fmt.Errorf("dns set: %w", err)
}
return nil
}
func (r *winRouter) Close() error {
if err := r.dns.Down(); err != nil {
return fmt.Errorf("dns down: %w", err)
}
if r.routeChangeCallback != nil {
r.routeChangeCallback.Unregister()
}
return nil
}
func cleanup(logf logger.Logf, interfaceName string) {
// Nothing to do here.
}