package listener import ( "fmt" "golang.org/x/exp/slices" "net" "sort" "strconv" "strings" "sync" "github.com/Dreamacro/clash/component/ebpf" C "github.com/Dreamacro/clash/constant" "github.com/Dreamacro/clash/listener/autoredir" LC "github.com/Dreamacro/clash/listener/config" "github.com/Dreamacro/clash/listener/http" "github.com/Dreamacro/clash/listener/mixed" "github.com/Dreamacro/clash/listener/redir" embedSS "github.com/Dreamacro/clash/listener/shadowsocks" "github.com/Dreamacro/clash/listener/sing_shadowsocks" "github.com/Dreamacro/clash/listener/sing_tun" "github.com/Dreamacro/clash/listener/sing_vmess" "github.com/Dreamacro/clash/listener/socks" "github.com/Dreamacro/clash/listener/tproxy" "github.com/Dreamacro/clash/listener/tuic" "github.com/Dreamacro/clash/listener/tunnel" "github.com/Dreamacro/clash/log" "github.com/samber/lo" ) var ( allowLan = false bindAddress = "*" socksListener *socks.Listener socksUDPListener *socks.UDPListener httpListener *http.Listener redirListener *redir.Listener redirUDPListener *tproxy.UDPListener tproxyListener *tproxy.Listener tproxyUDPListener *tproxy.UDPListener mixedListener *mixed.Listener mixedUDPLister *socks.UDPListener tunnelTCPListeners = map[string]*tunnel.Listener{} tunnelUDPListeners = map[string]*tunnel.PacketConn{} inboundListeners = map[string]C.InboundListener{} tunLister *sing_tun.Listener shadowSocksListener C.MultiAddrListener vmessListener *sing_vmess.Listener tuicListener *tuic.Listener autoRedirListener *autoredir.Listener autoRedirProgram *ebpf.TcEBpfProgram tcProgram *ebpf.TcEBpfProgram // lock for recreate function socksMux sync.Mutex httpMux sync.Mutex redirMux sync.Mutex tproxyMux sync.Mutex mixedMux sync.Mutex tunnelMux sync.Mutex inboundMux sync.Mutex tunMux sync.Mutex ssMux sync.Mutex vmessMux sync.Mutex tuicMux sync.Mutex autoRedirMux sync.Mutex tcMux sync.Mutex LastTunConf LC.Tun LastTuicConf LC.TuicServer ) type Ports struct { Port int `json:"port"` SocksPort int `json:"socks-port"` RedirPort int `json:"redir-port"` TProxyPort int `json:"tproxy-port"` MixedPort int `json:"mixed-port"` ShadowSocksConfig string `json:"ss-config"` VmessConfig string `json:"vmess-config"` } func GetTunConf() LC.Tun { if tunLister == nil { return LC.Tun{ Enable: false, } } return tunLister.Config() } func GetTuicConf() LC.TuicServer { if tuicListener == nil { return LC.TuicServer{Enable: false} } return tuicListener.Config() } func AllowLan() bool { return allowLan } func BindAddress() string { return bindAddress } func SetAllowLan(al bool) { allowLan = al } func SetBindAddress(host string) { bindAddress = host } func ReCreateHTTP(port int, tcpIn chan<- C.ConnContext) { httpMux.Lock() defer httpMux.Unlock() var err error defer func() { if err != nil { log.Errorln("Start HTTP server error: %s", err.Error()) } }() addr := genAddr(bindAddress, port, allowLan) if httpListener != nil { if httpListener.RawAddress() == addr { return } httpListener.Close() httpListener = nil } if portIsZero(addr) { return } httpListener, err = http.New(addr, tcpIn) if err != nil { log.Errorln("Start HTTP server error: %s", err.Error()) return } log.Infoln("HTTP proxy listening at: %s", httpListener.Address()) } func ReCreateSocks(port int, tcpIn chan<- C.ConnContext, udpIn chan<- C.PacketAdapter) { socksMux.Lock() defer socksMux.Unlock() var err error defer func() { if err != nil { log.Errorln("Start SOCKS server error: %s", err.Error()) } }() addr := genAddr(bindAddress, port, allowLan) shouldTCPIgnore := false shouldUDPIgnore := false if socksListener != nil { if socksListener.RawAddress() != addr { socksListener.Close() socksListener = nil } else { shouldTCPIgnore = true } } if socksUDPListener != nil { if socksUDPListener.RawAddress() != addr { socksUDPListener.Close() socksUDPListener = nil } else { shouldUDPIgnore = true } } if shouldTCPIgnore && shouldUDPIgnore { return } if portIsZero(addr) { return } tcpListener, err := socks.New(addr, tcpIn) if err != nil { return } udpListener, err := socks.NewUDP(addr, udpIn) if err != nil { tcpListener.Close() return } socksListener = tcpListener socksUDPListener = udpListener log.Infoln("SOCKS proxy listening at: %s", socksListener.Address()) } func ReCreateRedir(port int, tcpIn chan<- C.ConnContext, udpIn chan<- C.PacketAdapter) { redirMux.Lock() defer redirMux.Unlock() var err error defer func() { if err != nil { log.Errorln("Start Redir server error: %s", err.Error()) } }() addr := genAddr(bindAddress, port, allowLan) if redirListener != nil { if redirListener.RawAddress() == addr { return } redirListener.Close() redirListener = nil } if redirUDPListener != nil { if redirUDPListener.RawAddress() == addr { return } redirUDPListener.Close() redirUDPListener = nil } if portIsZero(addr) { return } redirListener, err = redir.New(addr, tcpIn) if err != nil { return } redirUDPListener, err = tproxy.NewUDP(addr, udpIn) if err != nil { log.Warnln("Failed to start Redir UDP Listener: %s", err) } log.Infoln("Redirect proxy listening at: %s", redirListener.Address()) } func ReCreateShadowSocks(shadowSocksConfig string, tcpIn chan<- C.ConnContext, udpIn chan<- C.PacketAdapter) { ssMux.Lock() defer ssMux.Unlock() var err error defer func() { if err != nil { log.Errorln("Start ShadowSocks server error: %s", err.Error()) } }() var ssConfig LC.ShadowsocksServer if addr, cipher, password, err := embedSS.ParseSSURL(shadowSocksConfig); err == nil { ssConfig = LC.ShadowsocksServer{ Enable: len(shadowSocksConfig) > 0, Listen: addr, Password: password, Cipher: cipher, } } shouldIgnore := false if shadowSocksListener != nil { if shadowSocksListener.Config() != ssConfig.String() { shadowSocksListener.Close() shadowSocksListener = nil } else { shouldIgnore = true } } if shouldIgnore { return } if !ssConfig.Enable { return } listener, err := sing_shadowsocks.New(ssConfig, tcpIn, udpIn) if err != nil { return } shadowSocksListener = listener for _, addr := range shadowSocksListener.AddrList() { log.Infoln("ShadowSocks proxy listening at: %s", addr.String()) } return } func ReCreateVmess(vmessConfig string, tcpIn chan<- C.ConnContext, udpIn chan<- C.PacketAdapter) { vmessMux.Lock() defer vmessMux.Unlock() var err error defer func() { if err != nil { log.Errorln("Start Vmess server error: %s", err.Error()) } }() var vsConfig LC.VmessServer if addr, username, password, err := sing_vmess.ParseVmessURL(vmessConfig); err == nil { vsConfig = LC.VmessServer{ Enable: len(vmessConfig) > 0, Listen: addr, Users: []LC.VmessUser{{Username: username, UUID: password, AlterID: 1}}, } } shouldIgnore := false if vmessListener != nil { if vmessListener.Config() != vsConfig.String() { vmessListener.Close() vmessListener = nil } else { shouldIgnore = true } } if shouldIgnore { return } if !vsConfig.Enable { return } listener, err := sing_vmess.New(vsConfig, tcpIn, udpIn) if err != nil { return } vmessListener = listener for _, addr := range vmessListener.AddrList() { log.Infoln("Vmess proxy listening at: %s", addr.String()) } return } func ReCreateTuic(config LC.TuicServer, tcpIn chan<- C.ConnContext, udpIn chan<- C.PacketAdapter) { tuicMux.Lock() defer func() { LastTuicConf = config tuicMux.Unlock() }() shouldIgnore := false var err error defer func() { if err != nil { log.Errorln("Start Tuic server error: %s", err.Error()) } }() if tuicListener != nil { if tuicListener.Config().String() != config.String() { tuicListener.Close() tuicListener = nil } else { shouldIgnore = true } } if shouldIgnore { return } if !config.Enable { return } listener, err := tuic.New(config, tcpIn, udpIn) if err != nil { return } tuicListener = listener for _, addr := range tuicListener.AddrList() { log.Infoln("Tuic proxy listening at: %s", addr.String()) } return } func ReCreateTProxy(port int, tcpIn chan<- C.ConnContext, udpIn chan<- C.PacketAdapter) { tproxyMux.Lock() defer tproxyMux.Unlock() var err error defer func() { if err != nil { log.Errorln("Start TProxy server error: %s", err.Error()) } }() addr := genAddr(bindAddress, port, allowLan) if tproxyListener != nil { if tproxyListener.RawAddress() == addr { return } tproxyListener.Close() tproxyListener = nil } if tproxyUDPListener != nil { if tproxyUDPListener.RawAddress() == addr { return } tproxyUDPListener.Close() tproxyUDPListener = nil } if portIsZero(addr) { return } tproxyListener, err = tproxy.New(addr, tcpIn) if err != nil { return } tproxyUDPListener, err = tproxy.NewUDP(addr, udpIn) if err != nil { log.Warnln("Failed to start TProxy UDP Listener: %s", err) } log.Infoln("TProxy server listening at: %s", tproxyListener.Address()) } func ReCreateMixed(port int, tcpIn chan<- C.ConnContext, udpIn chan<- C.PacketAdapter) { mixedMux.Lock() defer mixedMux.Unlock() var err error defer func() { if err != nil { log.Errorln("Start Mixed(http+socks) server error: %s", err.Error()) } }() addr := genAddr(bindAddress, port, allowLan) shouldTCPIgnore := false shouldUDPIgnore := false if mixedListener != nil { if mixedListener.RawAddress() != addr { mixedListener.Close() mixedListener = nil } else { shouldTCPIgnore = true } } if mixedUDPLister != nil { if mixedUDPLister.RawAddress() != addr { mixedUDPLister.Close() mixedUDPLister = nil } else { shouldUDPIgnore = true } } if shouldTCPIgnore && shouldUDPIgnore { return } if portIsZero(addr) { return } mixedListener, err = mixed.New(addr, tcpIn) if err != nil { return } mixedUDPLister, err = socks.NewUDP(addr, udpIn) if err != nil { mixedListener.Close() return } log.Infoln("Mixed(http+socks) proxy listening at: %s", mixedListener.Address()) } func ReCreateTun(tunConf LC.Tun, tcpIn chan<- C.ConnContext, udpIn chan<- C.PacketAdapter) { tunMux.Lock() defer func() { LastTunConf = tunConf tunMux.Unlock() }() var err error defer func() { if err != nil { log.Errorln("Start TUN listening error: %s", err.Error()) Cleanup(false) } }() if !hasTunConfigChange(&tunConf) { if tunLister != nil { tunLister.FlushDefaultInterface() } return } Cleanup(true) if !tunConf.Enable { return } tunLister, err = sing_tun.New(tunConf, tcpIn, udpIn) log.Infoln("[TUN] Tun adapter listening at: %s", tunLister.Address()) } func ReCreateRedirToTun(ifaceNames []string) { tcMux.Lock() defer tcMux.Unlock() nicArr := ifaceNames slices.Sort(nicArr) nicArr = slices.Compact(nicArr) if tcProgram != nil { tcProgram.Close() tcProgram = nil } if len(nicArr) == 0 { return } tunConf := GetTunConf() if !tunConf.Enable { return } program, err := ebpf.NewTcEBpfProgram(nicArr, tunConf.Device) if err != nil { log.Errorln("Attached tc ebpf program error: %v", err) return } tcProgram = program log.Infoln("Attached tc ebpf program to interfaces %v", tcProgram.RawNICs()) } func ReCreateAutoRedir(ifaceNames []string, tcpIn chan<- C.ConnContext, _ chan<- C.PacketAdapter) { autoRedirMux.Lock() defer autoRedirMux.Unlock() var err error defer func() { if err != nil { if autoRedirListener != nil { _ = autoRedirListener.Close() autoRedirListener = nil } if autoRedirProgram != nil { autoRedirProgram.Close() autoRedirProgram = nil } log.Errorln("Start auto redirect server error: %s", err.Error()) } }() nicArr := ifaceNames slices.Sort(nicArr) nicArr = slices.Compact(nicArr) if autoRedirListener != nil && autoRedirProgram != nil { _ = autoRedirListener.Close() autoRedirProgram.Close() autoRedirListener = nil autoRedirProgram = nil } if len(nicArr) == 0 { return } defaultRouteInterfaceName, err := ebpf.GetAutoDetectInterface() if err != nil { return } addr := genAddr("*", C.TcpAutoRedirPort, true) autoRedirListener, err = autoredir.New(addr, tcpIn) if err != nil { return } autoRedirProgram, err = ebpf.NewRedirEBpfProgram(nicArr, autoRedirListener.TCPAddr().Port(), defaultRouteInterfaceName) if err != nil { return } autoRedirListener.SetLookupFunc(autoRedirProgram.Lookup) log.Infoln("Auto redirect proxy listening at: %s, attached tc ebpf program to interfaces %v", autoRedirListener.Address(), autoRedirProgram.RawNICs()) } func PatchTunnel(tunnels []tunnel.Tunnel, tcpIn chan<- C.ConnContext, udpIn chan<- C.PacketAdapter) { tunnelMux.Lock() defer tunnelMux.Unlock() type addrProxy struct { network string addr string target string proxy string } tcpOld := lo.Map( lo.Keys(tunnelTCPListeners), func(key string, _ int) addrProxy { parts := strings.Split(key, "/") return addrProxy{ network: "tcp", addr: parts[0], target: parts[1], proxy: parts[2], } }, ) udpOld := lo.Map( lo.Keys(tunnelUDPListeners), func(key string, _ int) addrProxy { parts := strings.Split(key, "/") return addrProxy{ network: "udp", addr: parts[0], target: parts[1], proxy: parts[2], } }, ) oldElm := lo.Union(tcpOld, udpOld) newElm := lo.FlatMap( tunnels, func(tunnel tunnel.Tunnel, _ int) []addrProxy { return lo.Map( tunnel.Network, func(network string, _ int) addrProxy { return addrProxy{ network: network, addr: tunnel.Address, target: tunnel.Target, proxy: tunnel.Proxy, } }, ) }, ) needClose, needCreate := lo.Difference(oldElm, newElm) for _, elm := range needClose { key := fmt.Sprintf("%s/%s/%s", elm.addr, elm.target, elm.proxy) if elm.network == "tcp" { tunnelTCPListeners[key].Close() delete(tunnelTCPListeners, key) } else { tunnelUDPListeners[key].Close() delete(tunnelUDPListeners, key) } } for _, elm := range needCreate { key := fmt.Sprintf("%s/%s/%s", elm.addr, elm.target, elm.proxy) if elm.network == "tcp" { l, err := tunnel.New(elm.addr, elm.target, elm.proxy, tcpIn) if err != nil { log.Errorln("Start tunnel %s error: %s", elm.target, err.Error()) continue } tunnelTCPListeners[key] = l log.Infoln("Tunnel(tcp/%s) proxy %s listening at: %s", elm.target, elm.proxy, tunnelTCPListeners[key].Address()) } else { l, err := tunnel.NewUDP(elm.addr, elm.target, elm.proxy, udpIn) if err != nil { log.Errorln("Start tunnel %s error: %s", elm.target, err.Error()) continue } tunnelUDPListeners[key] = l log.Infoln("Tunnel(udp/%s) proxy %s listening at: %s", elm.target, elm.proxy, tunnelUDPListeners[key].Address()) } } } func PatchInboundListeners(newListenerMap map[string]C.InboundListener, tcpIn chan<- C.ConnContext, udpIn chan<- C.PacketAdapter, dropOld bool) { inboundMux.Lock() defer inboundMux.Unlock() for name, newListener := range newListenerMap { if oldListener, ok := inboundListeners[name]; ok { if !oldListener.Config().Equal(newListener.Config()) { _ = oldListener.Close() } else { continue } } if err := newListener.Listen(tcpIn, udpIn); err != nil { log.Errorln("Listener %s listen err: %s", name, err.Error()) continue } inboundListeners[name] = newListener } if dropOld { for name, oldListener := range inboundListeners { if _, ok := newListenerMap[name]; !ok { _ = oldListener.Close() delete(inboundListeners, name) } } } } // GetPorts return the ports of proxy servers func GetPorts() *Ports { ports := &Ports{} if httpListener != nil { _, portStr, _ := net.SplitHostPort(httpListener.Address()) port, _ := strconv.Atoi(portStr) ports.Port = port } if socksListener != nil { _, portStr, _ := net.SplitHostPort(socksListener.Address()) port, _ := strconv.Atoi(portStr) ports.SocksPort = port } if redirListener != nil { _, portStr, _ := net.SplitHostPort(redirListener.Address()) port, _ := strconv.Atoi(portStr) ports.RedirPort = port } if tproxyListener != nil { _, portStr, _ := net.SplitHostPort(tproxyListener.Address()) port, _ := strconv.Atoi(portStr) ports.TProxyPort = port } if mixedListener != nil { _, portStr, _ := net.SplitHostPort(mixedListener.Address()) port, _ := strconv.Atoi(portStr) ports.MixedPort = port } if shadowSocksListener != nil { ports.ShadowSocksConfig = shadowSocksListener.Config() } if vmessListener != nil { ports.VmessConfig = vmessListener.Config() } return ports } func portIsZero(addr string) bool { _, port, err := net.SplitHostPort(addr) if port == "0" || port == "" || err != nil { return true } return false } func genAddr(host string, port int, allowLan bool) string { if allowLan { if host == "*" { return fmt.Sprintf(":%d", port) } return fmt.Sprintf("%s:%d", host, port) } return fmt.Sprintf("127.0.0.1:%d", port) } func hasTunConfigChange(tunConf *LC.Tun) bool { if LastTunConf.Enable != tunConf.Enable || LastTunConf.Device != tunConf.Device || LastTunConf.Stack != tunConf.Stack || LastTunConf.AutoRoute != tunConf.AutoRoute || LastTunConf.AutoDetectInterface != tunConf.AutoDetectInterface || LastTunConf.MTU != tunConf.MTU || LastTunConf.StrictRoute != tunConf.StrictRoute || LastTunConf.EndpointIndependentNat != tunConf.EndpointIndependentNat || LastTunConf.UDPTimeout != tunConf.UDPTimeout { return true } if len(LastTunConf.DNSHijack) != len(tunConf.DNSHijack) { return true } sort.Slice(tunConf.DNSHijack, func(i, j int) bool { return tunConf.DNSHijack[i].Addr().Less(tunConf.DNSHijack[j].Addr()) }) sort.Slice(tunConf.Inet4Address, func(i, j int) bool { return tunConf.Inet4Address[i].Build().String() < tunConf.Inet4Address[j].Build().String() }) sort.Slice(tunConf.Inet6Address, func(i, j int) bool { return tunConf.Inet6Address[i].Build().String() < tunConf.Inet6Address[j].Build().String() }) sort.Slice(tunConf.Inet4RouteAddress, func(i, j int) bool { return tunConf.Inet4RouteAddress[i].Build().String() < tunConf.Inet4RouteAddress[j].Build().String() }) sort.Slice(tunConf.Inet6RouteAddress, func(i, j int) bool { return tunConf.Inet6RouteAddress[i].Build().String() < tunConf.Inet6RouteAddress[j].Build().String() }) sort.Slice(tunConf.IncludeUID, func(i, j int) bool { return tunConf.IncludeUID[i] < tunConf.IncludeUID[j] }) sort.Slice(tunConf.IncludeUIDRange, func(i, j int) bool { return tunConf.IncludeUIDRange[i] < tunConf.IncludeUIDRange[j] }) sort.Slice(tunConf.ExcludeUID, func(i, j int) bool { return tunConf.ExcludeUID[i] < tunConf.ExcludeUID[j] }) sort.Slice(tunConf.ExcludeUIDRange, func(i, j int) bool { return tunConf.ExcludeUIDRange[i] < tunConf.ExcludeUIDRange[j] }) sort.Slice(tunConf.IncludeAndroidUser, func(i, j int) bool { return tunConf.IncludeAndroidUser[i] < tunConf.IncludeAndroidUser[j] }) sort.Slice(tunConf.IncludePackage, func(i, j int) bool { return tunConf.IncludePackage[i] < tunConf.IncludePackage[j] }) sort.Slice(tunConf.ExcludePackage, func(i, j int) bool { return tunConf.ExcludePackage[i] < tunConf.ExcludePackage[j] }) if !slices.Equal(tunConf.DNSHijack, LastTunConf.DNSHijack) || !slices.Equal(tunConf.Inet4Address, LastTunConf.Inet4Address) || !slices.Equal(tunConf.Inet6Address, LastTunConf.Inet6Address) || !slices.Equal(tunConf.Inet4RouteAddress, LastTunConf.Inet4RouteAddress) || !slices.Equal(tunConf.Inet6RouteAddress, LastTunConf.Inet6RouteAddress) || !slices.Equal(tunConf.IncludeUID, LastTunConf.IncludeUID) || !slices.Equal(tunConf.IncludeUIDRange, LastTunConf.IncludeUIDRange) || !slices.Equal(tunConf.ExcludeUID, LastTunConf.ExcludeUID) || !slices.Equal(tunConf.ExcludeUIDRange, LastTunConf.ExcludeUIDRange) || !slices.Equal(tunConf.IncludeAndroidUser, LastTunConf.IncludeAndroidUser) || !slices.Equal(tunConf.IncludePackage, LastTunConf.IncludePackage) || !slices.Equal(tunConf.ExcludePackage, LastTunConf.ExcludePackage) { return true } return false } func Cleanup(wait bool) { if tunLister != nil { tunLister.Close() tunLister = nil } LastTunConf = LC.Tun{} }