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tailscale/wgengine/router/router.go

47 lines
1.4 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 presents an interface to manipulate the host network
// stack's state.
package router
import (
"github.com/tailscale/wireguard-go/device"
"github.com/tailscale/wireguard-go/tun"
"inet.af/netaddr"
"tailscale.com/types/logger"
)
// Router is responsible for managing the system network stack.
//
// There is typically only one instance of this interface per process.
type Router interface {
// Up brings the router up.
Up() error
// Set updates the OS network stack with new settings. It may be
// called multiple times with identical Settings, which the
// implementation should handle gracefully.
Set(Settings) error
// Close closes the router.
Close() error
}
// New returns a new Router for the current platform, using the
// provided tun device.
func New(logf logger.Logf, wgdev *device.Device, tundev tun.Device) (Router, error) {
return newUserspaceRouter(logf, wgdev, tundev)
}
// Settings is the subset of Tailscale configuration that is relevant
// to the OS's network stack.
type Settings struct {
LocalAddrs []netaddr.IPPrefix
DNS []netaddr.IP
DNSDomains []string
Routes []netaddr.IPPrefix // routes to point into the Tailscale interface
SubnetRoutes []netaddr.IPPrefix // subnets being advertised to other Tailscale nodes
}