mirror of
https://github.com/tailscale/tailscale.git
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91 lines
2.1 KiB
Go
91 lines
2.1 KiB
Go
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package router
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import (
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"fmt"
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"log"
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winipcfg "github.com/tailscale/winipcfg-go"
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"github.com/tailscale/wireguard-go/device"
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"github.com/tailscale/wireguard-go/tun"
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"tailscale.com/types/logger"
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"tailscale.com/wgengine/router/dns"
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)
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type winRouter struct {
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logf func(fmt string, args ...interface{})
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tunname string
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nativeTun *tun.NativeTun
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wgdev *device.Device
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routeChangeCallback *winipcfg.RouteChangeCallback
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dns *dns.Manager
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}
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func newUserspaceRouter(logf logger.Logf, wgdev *device.Device, tundev tun.Device) (Router, error) {
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tunname, err := tundev.Name()
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if err != nil {
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return nil, err
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}
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nativeTun := tundev.(*tun.NativeTun)
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guid := nativeTun.GUID().String()
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mconfig := dns.ManagerConfig{
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Logf: logf,
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InterfaceName: guid,
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}
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return &winRouter{
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logf: logf,
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wgdev: wgdev,
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tunname: tunname,
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nativeTun: nativeTun,
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dns: dns.NewManager(mconfig),
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}, nil
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}
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func (r *winRouter) Up() error {
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// MonitorDefaultRoutes handles making sure our wireguard UDP
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// traffic goes through the old route, not recursively through the VPN.
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var err error
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r.routeChangeCallback, err = monitorDefaultRoutes(r.wgdev, true, r.nativeTun)
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if err != nil {
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log.Fatalf("MonitorDefaultRoutes: %v\n", err)
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}
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return nil
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}
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func (r *winRouter) Set(cfg *Config) error {
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if cfg == nil {
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cfg = &shutdownConfig
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}
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err := configureInterface(cfg, r.nativeTun)
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if err != nil {
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r.logf("ConfigureInterface: %v\n", err)
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return err
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}
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if err := r.dns.Set(cfg.DNS); err != nil {
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return fmt.Errorf("dns set: %w", err)
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}
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return nil
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}
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func (r *winRouter) Close() error {
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if err := r.dns.Down(); err != nil {
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return fmt.Errorf("dns down: %w", err)
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}
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if r.routeChangeCallback != nil {
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r.routeChangeCallback.Unregister()
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}
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return nil
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}
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func cleanup(logf logger.Logf, interfaceName string) {
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// Nothing to do here.
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}
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