mirror of
https://github.com/netbirdio/netbird.git
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142 lines
3.3 KiB
Go
142 lines
3.3 KiB
Go
//go:build !ios
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package device
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import (
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"fmt"
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"os/exec"
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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/client/iface/bind"
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"github.com/netbirdio/netbird/client/iface/configurer"
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)
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type TunDevice 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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filteredDevice *FilteredDevice
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udpMux *bind.UniversalUDPMuxDefault
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configurer WGConfigurer
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}
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func NewTunDevice(name string, address WGAddress, port int, key string, mtu int, transportNet transport.Net, filterFn bind.FilterFn) *TunDevice {
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return &TunDevice{
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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 *TunDevice) Create() (WGConfigurer, error) {
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tunDevice, err := tun.CreateTUN(t.name, t.mtu)
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if err != nil {
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return nil, fmt.Errorf("error creating tun device: %s", err)
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}
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t.filteredDevice = newDeviceFilter(tunDevice)
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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.filteredDevice,
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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, fmt.Errorf("error assigning ip: %s", err)
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}
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t.configurer = configurer.NewUSPConfigurer(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, fmt.Errorf("error configuring interface: %s", err)
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}
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return t.configurer, nil
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}
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func (t *TunDevice) Up() (*bind.UniversalUDPMuxDefault, error) {
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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 *TunDevice) 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 *TunDevice) 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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t.device = nil
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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 *TunDevice) WgAddress() WGAddress {
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return t.address
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}
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func (t *TunDevice) DeviceName() string {
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return t.name
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}
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func (t *TunDevice) FilteredDevice() *FilteredDevice {
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return t.filteredDevice
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}
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// assignAddr Adds IP address to the tunnel interface and network route based on the range provided
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func (t *TunDevice) assignAddr() error {
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cmd := exec.Command("ifconfig", t.name, "inet", t.address.IP.String(), t.address.IP.String())
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if out, err := cmd.CombinedOutput(); err != nil {
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log.Errorf("adding address command '%v' failed with output: %s", cmd.String(), out)
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return err
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}
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// dummy ipv6 so routing works
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cmd = exec.Command("ifconfig", t.name, "inet6", "fe80::/64")
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if out, err := cmd.CombinedOutput(); err != nil {
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log.Debugf("adding address command '%v' failed with output: %s", cmd.String(), out)
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}
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routeCmd := exec.Command("route", "add", "-net", t.address.Network.String(), "-interface", t.name)
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if out, err := routeCmd.CombinedOutput(); err != nil {
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log.Errorf("adding route command '%v' failed with output: %s", routeCmd.String(), out)
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return err
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}
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return nil
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}
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