mirror of
https://github.com/netbirdio/netbird.git
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146 lines
2.9 KiB
Go
146 lines
2.9 KiB
Go
//go:build (linux && !android) || freebsd
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package iface
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import (
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"fmt"
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"os"
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"runtime"
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"github.com/pion/transport/v3"
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log "github.com/sirupsen/logrus"
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"golang.zx2c4.com/wireguard/device"
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"golang.zx2c4.com/wireguard/tun"
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"github.com/netbirdio/netbird/iface/bind"
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)
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type tunUSPDevice struct {
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name string
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address WGAddress
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port int
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key string
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mtu int
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iceBind *bind.ICEBind
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device *device.Device
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wrapper *DeviceWrapper
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udpMux *bind.UniversalUDPMuxDefault
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configurer wgConfigurer
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}
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func newTunUSPDevice(name string, address WGAddress, port int, key string, mtu int, transportNet transport.Net, filterFn bind.FilterFn) wgTunDevice {
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log.Infof("using userspace bind mode")
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checkUser()
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return &tunUSPDevice{
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name: name,
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address: address,
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port: port,
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key: key,
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mtu: mtu,
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iceBind: bind.NewICEBind(transportNet, filterFn),
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}
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}
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func (t *tunUSPDevice) Create() (wgConfigurer, error) {
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log.Info("create tun interface")
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tunIface, err := tun.CreateTUN(t.name, t.mtu)
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if err != nil {
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log.Debugf("failed to create tun unterface (%s, %d): %s", t.name, t.mtu, err)
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return nil, err
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}
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t.wrapper = newDeviceWrapper(tunIface)
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// We need to create a wireguard-go device and listen to configuration requests
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t.device = device.NewDevice(
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t.wrapper,
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t.iceBind,
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device.NewLogger(wgLogLevel(), "[netbird] "),
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)
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err = t.assignAddr()
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if err != nil {
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t.device.Close()
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return nil, err
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}
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t.configurer = newWGUSPConfigurer(t.device, t.name)
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err = t.configurer.configureInterface(t.key, t.port)
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if err != nil {
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t.device.Close()
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t.configurer.close()
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return nil, err
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}
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return t.configurer, nil
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}
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func (t *tunUSPDevice) Up() (*bind.UniversalUDPMuxDefault, error) {
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if t.device == nil {
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return nil, fmt.Errorf("device is not ready yet")
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}
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err := t.device.Up()
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if err != nil {
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return nil, err
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}
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udpMux, err := t.iceBind.GetICEMux()
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if err != nil {
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return nil, err
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}
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t.udpMux = udpMux
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log.Debugf("device is ready to use: %s", t.name)
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return udpMux, nil
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}
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func (t *tunUSPDevice) UpdateAddr(address WGAddress) error {
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t.address = address
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return t.assignAddr()
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}
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func (t *tunUSPDevice) Close() error {
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if t.configurer != nil {
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t.configurer.close()
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}
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if t.device != nil {
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t.device.Close()
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}
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if t.udpMux != nil {
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return t.udpMux.Close()
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}
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return nil
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}
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func (t *tunUSPDevice) WgAddress() WGAddress {
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return t.address
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}
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func (t *tunUSPDevice) DeviceName() string {
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return t.name
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}
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func (t *tunUSPDevice) Wrapper() *DeviceWrapper {
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return t.wrapper
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}
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// assignAddr Adds IP address to the tunnel interface
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func (t *tunUSPDevice) assignAddr() error {
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link := newWGLink(t.name)
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return link.assignAddr(t.address)
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}
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func checkUser() {
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if runtime.GOOS == "freebsd" {
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euid := os.Geteuid()
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if euid != 0 {
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log.Warn("newTunUSPDevice: on netbird must run as root to be able to assign address to the tun interface with ifconfig")
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}
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}
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}
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