mirror of
https://github.com/SagerNet/sing-box.git
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250 lines
7.3 KiB
Go
250 lines
7.3 KiB
Go
//go:build with_wireguard
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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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"fmt"
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"net"
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"strings"
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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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C "github.com/sagernet/sing-box/constant"
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"github.com/sagernet/sing-box/log"
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"github.com/sagernet/sing-box/option"
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"github.com/sagernet/sing-box/transport/wireguard"
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"github.com/sagernet/sing-dns"
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"github.com/sagernet/sing-tun"
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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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var (
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_ adapter.Outbound = (*WireGuard)(nil)
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_ adapter.InterfaceUpdateListener = (*WireGuard)(nil)
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)
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type WireGuard struct {
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myOutboundAdapter
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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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}
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func NewWireGuard(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.WireGuardOutboundOptions) (*WireGuard, error) {
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outbound := &WireGuard{
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myOutboundAdapter: myOutboundAdapter{
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protocol: C.TypeWireGuard,
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network: options.Network.Build(),
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router: router,
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logger: logger,
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tag: tag,
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dependencies: withDialerDependency(options.DialerOptions),
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},
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}
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var reserved [3]uint8
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if len(options.Reserved) > 0 {
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if len(options.Reserved) != 3 {
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return nil, E.New("invalid reserved value, required 3 bytes, got ", len(options.Reserved))
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}
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copy(reserved[:], options.Reserved)
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}
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var isConnect bool
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var connectAddr M.Socksaddr
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if len(options.Peers) < 2 {
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isConnect = true
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if len(options.Peers) == 1 {
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connectAddr = options.Peers[0].ServerOptions.Build()
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} else {
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connectAddr = options.ServerOptions.Build()
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}
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}
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outboundDialer, err := dialer.New(router, options.DialerOptions)
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if err != nil {
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return nil, err
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}
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outbound.bind = wireguard.NewClientBind(ctx, outbound, outboundDialer, isConnect, connectAddr, reserved)
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localPrefixes := common.Map(options.LocalAddress, option.ListenPrefix.Build)
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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 string
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{
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bytes, err := base64.StdEncoding.DecodeString(options.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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ipcConf := "private_key=" + privateKey
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if len(options.Peers) > 0 {
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for i, peer := range options.Peers {
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var peerPublicKey, preSharedKey string
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{
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bytes, err := base64.StdEncoding.DecodeString(peer.PublicKey)
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if err != nil {
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return nil, E.Cause(err, "decode public key for peer ", i)
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}
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peerPublicKey = hex.EncodeToString(bytes)
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}
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if peer.PreSharedKey != "" {
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bytes, err := base64.StdEncoding.DecodeString(peer.PreSharedKey)
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if err != nil {
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return nil, E.Cause(err, "decode pre shared key for peer ", i)
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}
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preSharedKey = hex.EncodeToString(bytes)
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}
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destination := peer.ServerOptions.Build()
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ipcConf += "\npublic_key=" + peerPublicKey
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ipcConf += "\nendpoint=" + destination.String()
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if preSharedKey != "" {
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ipcConf += "\npreshared_key=" + preSharedKey
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}
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if len(peer.AllowedIPs) == 0 {
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return nil, E.New("missing allowed_ips for peer ", i)
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}
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for _, allowedIP := range peer.AllowedIPs {
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ipcConf += "\nallowed_ip=" + allowedIP
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}
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if len(peer.Reserved) > 0 {
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if len(peer.Reserved) != 3 {
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return nil, E.New("invalid reserved value for peer ", i, ", required 3 bytes, got ", len(peer.Reserved))
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}
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copy(reserved[:], options.Reserved)
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outbound.bind.SetReservedForEndpoint(destination, reserved)
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}
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}
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} else {
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var peerPublicKey, preSharedKey string
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{
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bytes, err := base64.StdEncoding.DecodeString(options.PeerPublicKey)
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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 options.PreSharedKey != "" {
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bytes, err := base64.StdEncoding.DecodeString(options.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 += "\npublic_key=" + peerPublicKey
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ipcConf += "\nendpoint=" + options.ServerOptions.Build().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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}
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mtu := options.MTU
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if mtu == 0 {
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mtu = 1408
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}
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var wireTunDevice wireguard.Device
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if !options.SystemInterface && tun.WithGVisor {
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wireTunDevice, err = wireguard.NewStackDevice(localPrefixes, mtu)
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} else {
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wireTunDevice, err = wireguard.NewSystemDevice(router, options.InterfaceName, localPrefixes, mtu)
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}
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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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wgDevice := device.NewDevice(ctx, wireTunDevice, outbound.bind, &device.Logger{
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Verbosef: func(format string, args ...interface{}) {
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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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logger.Error(fmt.Sprintf(strings.ToLower(format), args...))
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},
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}, options.Workers)
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if debug.Enabled {
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logger.Trace("created wireguard ipc conf: \n", ipcConf)
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}
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err = wgDevice.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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outbound.device = wgDevice
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outbound.tunDevice = wireTunDevice
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return outbound, nil
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}
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func (w *WireGuard) InterfaceUpdated() {
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w.bind.Reset()
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return
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}
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func (w *WireGuard) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
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switch network {
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case N.NetworkTCP:
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w.logger.InfoContext(ctx, "outbound connection to ", destination)
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case N.NetworkUDP:
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w.logger.InfoContext(ctx, "outbound packet connection to ", destination)
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}
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if destination.IsFqdn() {
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destinationAddresses, err := w.router.LookupDefault(ctx, destination.Fqdn)
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if err != nil {
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return nil, err
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}
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return N.DialSerial(ctx, w.tunDevice, network, destination, destinationAddresses)
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}
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return w.tunDevice.DialContext(ctx, network, destination)
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}
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func (w *WireGuard) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
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w.logger.InfoContext(ctx, "outbound packet connection to ", destination)
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if destination.IsFqdn() {
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destinationAddresses, err := w.router.LookupDefault(ctx, destination.Fqdn)
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if err != nil {
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return nil, err
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}
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packetConn, _, err := N.ListenSerial(ctx, w.tunDevice, destination, destinationAddresses)
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if err != nil {
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return nil, err
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}
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return packetConn, err
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}
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return w.tunDevice.ListenPacket(ctx, destination)
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}
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func (w *WireGuard) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
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return NewDirectConnection(ctx, w.router, w, conn, metadata, dns.DomainStrategyAsIS)
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}
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func (w *WireGuard) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
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return NewDirectPacketConnection(ctx, w.router, w, conn, metadata, dns.DomainStrategyAsIS)
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}
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func (w *WireGuard) Start() error {
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return w.tunDevice.Start()
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}
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func (w *WireGuard) Close() error {
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if w.device != nil {
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w.device.Close()
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}
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w.tunDevice.Close()
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return nil
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}
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