netbird/iface/tun_android.go
2023-04-28 16:26:54 +02:00

96 lines
2.1 KiB
Go

package iface
import (
"strings"
"github.com/pion/transport/v2"
log "github.com/sirupsen/logrus"
"golang.org/x/sys/unix"
"golang.zx2c4.com/wireguard/device"
"golang.zx2c4.com/wireguard/tun"
"github.com/netbirdio/netbird/iface/bind"
)
type tunDevice struct {
address WGAddress
mtu int
routes []string
tunAdapter TunAdapter
fd int
name string
device *device.Device
iceBind *bind.ICEBind
}
func newTunDevice(address WGAddress, mtu int, routes []string, tunAdapter TunAdapter, transportNet transport.Net) *tunDevice {
return &tunDevice{
address: address,
mtu: mtu,
routes: routes,
tunAdapter: tunAdapter,
iceBind: bind.NewICEBind(transportNet),
}
}
func (t *tunDevice) Create() error {
var err error
routesString := t.routesToString()
t.fd, err = t.tunAdapter.ConfigureInterface(t.address.String(), t.mtu, routesString)
if err != nil {
log.Errorf("failed to create Android interface: %s", err)
return err
}
tunDevice, name, err := tun.CreateUnmonitoredTUNFromFD(t.fd)
if err != nil {
unix.Close(t.fd)
return err
}
t.name = name
log.Debugf("attaching to interface %v", name)
t.device = device.NewDevice(tunDevice, t.iceBind, device.NewLogger(device.LogLevelSilent, "[wiretrustee] "))
// without this property mobile devices can discover remote endpoints if the configured one was wrong.
// this helps with support for the older NetBird clients that had a hardcoded direct mode
//t.device.DisableSomeRoamingForBrokenMobileSemantics()
err = t.device.Up()
if err != nil {
t.device.Close()
return err
}
log.Debugf("device is ready to use: %s", name)
return nil
}
func (t *tunDevice) Device() *device.Device {
return t.device
}
func (t *tunDevice) DeviceName() string {
return t.name
}
func (t *tunDevice) WgAddress() WGAddress {
return t.address
}
func (t *tunDevice) UpdateAddr(addr WGAddress) error {
// todo implement
return nil
}
func (t *tunDevice) Close() (err error) {
if t.device != nil {
t.device.Close()
}
return
}
func (t *tunDevice) routesToString() string {
return strings.Join(t.routes, ";")
}