328 lines
8.5 KiB
Go
328 lines
8.5 KiB
Go
package outbound
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import (
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"context"
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"encoding/base64"
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"encoding/hex"
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"errors"
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"fmt"
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"net"
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"net/netip"
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"runtime"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/Dreamacro/clash/component/dialer"
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"github.com/Dreamacro/clash/component/resolver"
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C "github.com/Dreamacro/clash/constant"
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"github.com/Dreamacro/clash/listener/sing"
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wireguard "github.com/metacubex/sing-wireguard"
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"github.com/sagernet/sing/common"
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"github.com/sagernet/sing/common/debug"
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E "github.com/sagernet/sing/common/exceptions"
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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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"github.com/sagernet/wireguard-go/device"
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)
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type WireGuard struct {
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*Base
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bind *wireguard.ClientBind
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device *device.Device
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tunDevice wireguard.Device
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dialer *wgDialer
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startOnce sync.Once
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}
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type WireGuardOption struct {
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BasicOption
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Name string `proxy:"name"`
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Server string `proxy:"server"`
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Port int `proxy:"port"`
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Ip string `proxy:"ip,omitempty"`
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Ipv6 string `proxy:"ipv6,omitempty"`
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PrivateKey string `proxy:"private-key"`
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PublicKey string `proxy:"public-key"`
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PreSharedKey string `proxy:"pre-shared-key,omitempty"`
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Reserved []int `proxy:"reserved,omitempty"`
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Workers int `proxy:"workers,omitempty"`
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MTU int `proxy:"mtu,omitempty"`
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UDP bool `proxy:"udp,omitempty"`
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}
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type wgDialer struct {
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options []dialer.Option
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}
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func (d *wgDialer) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
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return dialer.DialContext(ctx, network, destination.String(), d.options...)
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}
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func (d *wgDialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
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return dialer.ListenPacket(ctx, "udp", "", d.options...)
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}
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func NewWireGuard(option WireGuardOption) (*WireGuard, error) {
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outbound := &WireGuard{
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Base: &Base{
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name: option.Name,
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addr: net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
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tp: C.WireGuard,
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udp: option.UDP,
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iface: option.Interface,
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rmark: option.RoutingMark,
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prefer: C.NewDNSPrefer(option.IPVersion),
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},
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dialer: &wgDialer{},
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}
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runtime.SetFinalizer(outbound, closeWireGuard)
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var reserved [3]uint8
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if len(option.Reserved) > 0 {
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if len(option.Reserved) != 3 {
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return nil, E.New("invalid reserved value, required 3 bytes, got ", len(option.Reserved))
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}
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reserved[0] = uint8(option.Reserved[0])
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reserved[1] = uint8(option.Reserved[1])
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reserved[2] = uint8(option.Reserved[2])
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}
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peerAddr := M.ParseSocksaddr(option.Server)
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peerAddr.Port = uint16(option.Port)
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outbound.bind = wireguard.NewClientBind(context.Background(), outbound.dialer, peerAddr, reserved)
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localPrefixes := make([]netip.Prefix, 0, 2)
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if len(option.Ip) > 0 {
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if !strings.Contains(option.Ip, "/") {
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option.Ip = option.Ip + "/32"
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}
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if prefix, err := netip.ParsePrefix(option.Ip); err == nil {
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localPrefixes = append(localPrefixes, prefix)
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} else {
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return nil, E.Cause(err, "ip address parse error")
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}
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}
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if len(option.Ipv6) > 0 {
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if !strings.Contains(option.Ipv6, "/") {
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option.Ipv6 = option.Ipv6 + "/128"
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}
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if prefix, err := netip.ParsePrefix(option.Ipv6); err == nil {
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localPrefixes = append(localPrefixes, prefix)
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} else {
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return nil, E.Cause(err, "ipv6 address parse error")
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}
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}
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if len(localPrefixes) == 0 {
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return nil, E.New("missing local address")
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}
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var privateKey, peerPublicKey, preSharedKey string
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{
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bytes, err := base64.StdEncoding.DecodeString(option.PrivateKey)
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if err != nil {
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return nil, E.Cause(err, "decode private key")
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}
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privateKey = hex.EncodeToString(bytes)
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}
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{
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bytes, err := base64.StdEncoding.DecodeString(option.PublicKey)
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if err != nil {
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return nil, E.Cause(err, "decode peer public key")
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}
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peerPublicKey = hex.EncodeToString(bytes)
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}
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if option.PreSharedKey != "" {
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bytes, err := base64.StdEncoding.DecodeString(option.PreSharedKey)
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if err != nil {
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return nil, E.Cause(err, "decode pre shared key")
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}
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preSharedKey = hex.EncodeToString(bytes)
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}
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ipcConf := "private_key=" + privateKey
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ipcConf += "\npublic_key=" + peerPublicKey
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ipcConf += "\nendpoint=" + peerAddr.String()
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if preSharedKey != "" {
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ipcConf += "\npreshared_key=" + preSharedKey
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}
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var has4, has6 bool
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for _, address := range localPrefixes {
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if address.Addr().Is4() {
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has4 = true
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} else {
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has6 = true
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}
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}
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if has4 {
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ipcConf += "\nallowed_ip=0.0.0.0/0"
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}
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if has6 {
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ipcConf += "\nallowed_ip=::/0"
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}
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mtu := option.MTU
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if mtu == 0 {
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mtu = 1408
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}
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var err error
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outbound.tunDevice, err = wireguard.NewStackDevice(localPrefixes, uint32(mtu))
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if err != nil {
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return nil, E.Cause(err, "create WireGuard device")
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}
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outbound.device = device.NewDevice(outbound.tunDevice, outbound.bind, &device.Logger{
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Verbosef: func(format string, args ...interface{}) {
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sing.Logger.Debug(fmt.Sprintf(strings.ToLower(format), args...))
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},
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Errorf: func(format string, args ...interface{}) {
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sing.Logger.Error(fmt.Sprintf(strings.ToLower(format), args...))
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},
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}, option.Workers)
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if debug.Enabled {
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sing.Logger.Trace("created wireguard ipc conf: \n", ipcConf)
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}
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err = outbound.device.IpcSet(ipcConf)
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if err != nil {
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return nil, E.Cause(err, "setup wireguard")
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}
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//err = outbound.tunDevice.Start()
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return outbound, nil
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}
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func closeWireGuard(w *WireGuard) {
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if w.device != nil {
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w.device.Close()
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}
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_ = common.Close(w.tunDevice)
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}
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func (w *WireGuard) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
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w.dialer.options = opts
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var conn net.Conn
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w.startOnce.Do(func() {
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err = w.tunDevice.Start()
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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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if !metadata.Resolved() {
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var addrs []netip.Addr
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addrs, err = resolver.ResolveAllIP(metadata.Host)
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if err != nil {
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return nil, err
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}
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conn, err = N.DialSerial(ctx, w.tunDevice, "tcp", M.ParseSocksaddr(metadata.RemoteAddress()), addrs)
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} else {
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conn, err = w.tunDevice.DialContext(ctx, "tcp", M.ParseSocksaddr(metadata.Pure().RemoteAddress()))
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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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return NewConn(&wgConn{conn, w}, w), nil
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}
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func (w *WireGuard) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.PacketConn, err error) {
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w.dialer.options = opts
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var pc net.PacketConn
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w.startOnce.Do(func() {
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err = w.tunDevice.Start()
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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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if !metadata.Resolved() {
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ip, err := resolver.ResolveIP(metadata.Host)
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if err != nil {
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return nil, errors.New("can't resolve ip")
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}
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metadata.DstIP = ip
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}
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pc, err = w.tunDevice.ListenPacket(ctx, M.ParseSocksaddr(metadata.Pure().RemoteAddress()))
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if err != nil {
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return nil, err
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}
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return newPacketConn(&wgPacketConn{pc, w}, w), nil
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}
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type wgConn struct {
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conn net.Conn
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wg *WireGuard
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}
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func (c *wgConn) Read(b []byte) (n int, err error) {
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defer runtime.KeepAlive(c.wg)
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return c.conn.Read(b)
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}
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func (c *wgConn) Write(b []byte) (n int, err error) {
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defer runtime.KeepAlive(c.wg)
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return c.conn.Write(b)
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}
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func (c *wgConn) Close() error {
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defer runtime.KeepAlive(c.wg)
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return c.conn.Close()
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}
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func (c *wgConn) LocalAddr() net.Addr {
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defer runtime.KeepAlive(c.wg)
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return c.conn.LocalAddr()
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}
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func (c *wgConn) RemoteAddr() net.Addr {
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defer runtime.KeepAlive(c.wg)
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return c.conn.RemoteAddr()
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}
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func (c *wgConn) SetDeadline(t time.Time) error {
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defer runtime.KeepAlive(c.wg)
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return c.conn.SetDeadline(t)
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}
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func (c *wgConn) SetReadDeadline(t time.Time) error {
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defer runtime.KeepAlive(c.wg)
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return c.conn.SetReadDeadline(t)
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}
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func (c *wgConn) SetWriteDeadline(t time.Time) error {
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defer runtime.KeepAlive(c.wg)
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return c.conn.SetWriteDeadline(t)
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}
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type wgPacketConn struct {
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pc net.PacketConn
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wg *WireGuard
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}
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func (pc *wgPacketConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
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defer runtime.KeepAlive(pc.wg)
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return pc.pc.ReadFrom(p)
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}
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func (pc *wgPacketConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
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defer runtime.KeepAlive(pc.wg)
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return pc.pc.WriteTo(p, addr)
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}
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func (pc *wgPacketConn) Close() error {
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defer runtime.KeepAlive(pc.wg)
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return pc.pc.Close()
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}
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func (pc *wgPacketConn) LocalAddr() net.Addr {
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defer runtime.KeepAlive(pc.wg)
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return pc.pc.LocalAddr()
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}
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func (pc *wgPacketConn) SetDeadline(t time.Time) error {
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defer runtime.KeepAlive(pc.wg)
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return pc.pc.SetDeadline(t)
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}
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func (pc *wgPacketConn) SetReadDeadline(t time.Time) error {
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defer runtime.KeepAlive(pc.wg)
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return pc.pc.SetReadDeadline(t)
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}
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func (pc *wgPacketConn) SetWriteDeadline(t time.Time) error {
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defer runtime.KeepAlive(pc.wg)
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return pc.pc.SetWriteDeadline(t)
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}
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