mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-09-20 10:37:51 +00:00
140 lines
3 KiB
Go
140 lines
3 KiB
Go
package wireguard
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import (
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"context"
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"net"
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"net/netip"
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"os"
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"github.com/sagernet/sing-box/adapter"
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"github.com/sagernet/sing-box/common/dialer"
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"github.com/sagernet/sing-box/option"
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"github.com/sagernet/sing-tun"
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M "github.com/sagernet/sing/common/metadata"
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N "github.com/sagernet/sing/common/network"
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wgTun "github.com/sagernet/wireguard-go/tun"
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)
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var _ Device = (*SystemDevice)(nil)
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type SystemDevice struct {
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dialer N.Dialer
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device tun.Tun
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name string
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mtu int
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events chan wgTun.Event
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addr4 netip.Addr
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addr6 netip.Addr
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}
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func NewSystemDevice(router adapter.Router, interfaceName string, localPrefixes []netip.Prefix, mtu uint32) (*SystemDevice, error) {
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var inet4Addresses []netip.Prefix
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var inet6Addresses []netip.Prefix
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for _, prefixes := range localPrefixes {
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if prefixes.Addr().Is4() {
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inet4Addresses = append(inet4Addresses, prefixes)
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} else {
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inet6Addresses = append(inet6Addresses, prefixes)
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}
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}
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if interfaceName == "" {
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interfaceName = tun.CalculateInterfaceName("wg")
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}
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tunInterface, err := tun.New(tun.Options{
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Name: interfaceName,
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Inet4Address: inet4Addresses,
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Inet6Address: inet6Addresses,
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MTU: mtu,
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})
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if err != nil {
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return nil, err
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}
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var inet4Address netip.Addr
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var inet6Address netip.Addr
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if len(inet4Addresses) > 0 {
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inet4Address = inet4Addresses[0].Addr()
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}
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if len(inet6Addresses) > 0 {
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inet6Address = inet6Addresses[0].Addr()
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}
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return &SystemDevice{
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dialer: dialer.NewDefault(router, option.DialerOptions{
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BindInterface: interfaceName,
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}),
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device: tunInterface,
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name: interfaceName,
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mtu: int(mtu),
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events: make(chan wgTun.Event),
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addr4: inet4Address,
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addr6: inet6Address,
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}, nil
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}
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func (w *SystemDevice) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
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return w.dialer.DialContext(ctx, network, destination)
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}
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func (w *SystemDevice) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
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return w.dialer.ListenPacket(ctx, destination)
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}
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func (w *SystemDevice) Inet4Address() netip.Addr {
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return w.addr4
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}
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func (w *SystemDevice) Inet6Address() netip.Addr {
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return w.addr6
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}
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func (w *SystemDevice) Start() error {
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w.events <- wgTun.EventUp
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return nil
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}
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func (w *SystemDevice) File() *os.File {
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return nil
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}
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func (w *SystemDevice) Read(bufs [][]byte, sizes []int, offset int) (count int, err error) {
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sizes[0], err = w.device.Read(bufs[0][offset-tun.PacketOffset:])
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if err == nil {
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count = 1
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}
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return
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}
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func (w *SystemDevice) Write(bufs [][]byte, offset int) (count int, err error) {
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for _, b := range bufs {
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_, err = w.device.Write(b[offset:])
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if err != nil {
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return
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}
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count++
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}
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return
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}
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func (w *SystemDevice) Flush() error {
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return nil
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}
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func (w *SystemDevice) MTU() (int, error) {
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return w.mtu, nil
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}
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func (w *SystemDevice) Name() (string, error) {
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return w.name, nil
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}
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func (w *SystemDevice) Events() <-chan wgTun.Event {
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return w.events
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}
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func (w *SystemDevice) Close() error {
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return w.device.Close()
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}
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func (w *SystemDevice) BatchSize() int {
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return 1
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}
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