sing-box/transport/wireguard/device_system.go
2022-09-23 13:14:31 +08:00

117 lines
2.6 KiB
Go

package wireguard
import (
"context"
"net"
"net/netip"
"os"
"github.com/sagernet/sing-box/adapter"
"github.com/sagernet/sing-box/common/dialer"
"github.com/sagernet/sing-box/option"
"github.com/sagernet/sing-tun"
M "github.com/sagernet/sing/common/metadata"
N "github.com/sagernet/sing/common/network"
wgTun "golang.zx2c4.com/wireguard/tun"
)
var _ Device = (*SystemDevice)(nil)
type SystemDevice struct {
dialer N.Dialer
device tun.Tun
name string
mtu int
events chan wgTun.Event
}
/*func (w *SystemDevice) NewEndpoint() (stack.LinkEndpoint, error) {
gTun, isGTun := w.device.(tun.GVisorTun)
if !isGTun {
return nil, tun.ErrGVisorUnsupported
}
return gTun.NewEndpoint()
}*/
func NewSystemDevice(router adapter.Router, interfaceName string, localPrefixes []netip.Prefix, mtu uint32) (*SystemDevice, error) {
var inet4Addresses []netip.Prefix
var inet6Addresses []netip.Prefix
for _, prefixes := range localPrefixes {
if prefixes.Addr().Is4() {
inet4Addresses = append(inet4Addresses, prefixes)
} else {
inet6Addresses = append(inet6Addresses, prefixes)
}
}
if interfaceName == "" {
interfaceName = tun.CalculateInterfaceName("wg")
}
tunInterface, err := tun.Open(tun.Options{
Name: interfaceName,
Inet4Address: inet4Addresses,
Inet6Address: inet6Addresses,
MTU: mtu,
})
if err != nil {
return nil, err
}
return &SystemDevice{
dialer.NewDefault(router, option.DialerOptions{
BindInterface: interfaceName,
}),
tunInterface, interfaceName, int(mtu), make(chan wgTun.Event),
}, nil
}
func (w *SystemDevice) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
return w.dialer.DialContext(ctx, network, destination)
}
func (w *SystemDevice) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
return w.dialer.ListenPacket(ctx, destination)
}
func (w *SystemDevice) Start() error {
w.events <- wgTun.EventUp
return nil
}
func (w *SystemDevice) File() *os.File {
return nil
}
func (w *SystemDevice) Read(bytes []byte, index int) (int, error) {
return w.device.Read(bytes[index-tunPacketOffset:])
}
func (w *SystemDevice) Write(bytes []byte, index int) (int, error) {
return w.device.Write(bytes[index:])
}
func (w *SystemDevice) Flush() error {
return nil
}
func (w *SystemDevice) MTU() (int, error) {
return w.mtu, nil
}
func (w *SystemDevice) Name() (string, error) {
return w.name, nil
}
func (w *SystemDevice) Events() chan wgTun.Event {
return w.events
}
func (w *SystemDevice) Close() error {
select {
case <-w.events:
return os.ErrClosed
default:
close(w.events)
}
return w.device.Close()
}