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tun_darwin.go
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tun_darwin.go
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//go:build !ios
// +build !ios
package iface
import (
"os/exec"
"github.com/pion/transport/v3"
log "github.com/sirupsen/logrus"
"golang.zx2c4.com/wireguard/device"
"golang.zx2c4.com/wireguard/tun"
"github.com/netbirdio/netbird/iface/bind"
)
type tunDevice struct {
name string
address WGAddress
port int
key string
mtu int
iceBind *bind.ICEBind
device *device.Device
wrapper *DeviceWrapper
udpMux *bind.UniversalUDPMuxDefault
configurer wgConfigurer
}
func newTunDevice(name string, address WGAddress, port int, key string, mtu int, transportNet transport.Net) wgTunDevice {
return &tunDevice{
name: name,
address: address,
port: port,
key: key,
mtu: mtu,
iceBind: bind.NewICEBind(transportNet),
}
}
func (t *tunDevice) Create() (wgConfigurer, error) {
tunDevice, err := tun.CreateTUN(t.name, t.mtu)
if err != nil {
return nil, err
}
t.wrapper = newDeviceWrapper(tunDevice)
// We need to create a wireguard-go device and listen to configuration requests
t.device = device.NewDevice(
t.wrapper,
t.iceBind,
device.NewLogger(device.LogLevelSilent, "[netbird] "),
)
err = t.assignAddr()
if err != nil {
t.device.Close()
return nil, err
}
t.configurer = newWGUSPConfigurer(t.device, t.name)
err = t.configurer.configureInterface(t.key, t.port)
if err != nil {
t.device.Close()
t.configurer.close()
return nil, err
}
return t.configurer, nil
}
func (t *tunDevice) Up() (*bind.UniversalUDPMuxDefault, error) {
err := t.device.Up()
if err != nil {
return nil, err
}
udpMux, err := t.iceBind.GetICEMux()
if err != nil {
return nil, err
}
t.udpMux = udpMux
log.Debugf("device is ready to use: %s", t.name)
return udpMux, nil
}
func (t *tunDevice) UpdateAddr(address WGAddress) error {
t.address = address
return t.assignAddr()
}
func (t *tunDevice) Close() error {
if t.configurer != nil {
t.configurer.close()
}
if t.device != nil {
t.device.Close()
t.device = nil
}
if t.udpMux != nil {
return t.udpMux.Close()
}
return nil
}
func (t *tunDevice) WgAddress() WGAddress {
return t.address
}
func (t *tunDevice) DeviceName() string {
return t.name
}
func (t *tunDevice) Wrapper() *DeviceWrapper {
return t.wrapper
}
// assignAddr Adds IP address to the tunnel interface and network route based on the range provided
func (t *tunDevice) assignAddr() error {
cmd := exec.Command("ifconfig", t.name, "inet", t.address.IP.String(), t.address.IP.String())
if out, err := cmd.CombinedOutput(); err != nil {
log.Infof(`adding address command "%v" failed with output %s and error: `, cmd.String(), out)
return err
}
routeCmd := exec.Command("route", "add", "-net", t.address.Network.String(), "-interface", t.name)
if out, err := routeCmd.CombinedOutput(); err != nil {
log.Printf(`adding route command "%v" failed with output %s and error: `, routeCmd.String(), out)
return err
}
return nil
}