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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,173 @@ | ||
| package upnp | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "errors" | ||
| "github.com/fatedier/frp/pkg/util/xlog" | ||
| "golang.org/x/sync/errgroup" | ||
| "net" | ||
| "net/netip" | ||
| "time" | ||
|
|
||
| "github.com/huin/goupnp/dcps/internetgateway2" | ||
| "github.com/jackpal/gateway" | ||
| ) | ||
|
|
||
| const DEFAULT_UPNP_PROGRAM_DESCRIPTION = "helper-port-mapping" | ||
|
|
||
| type RouterClient interface { | ||
| AddPortMapping( | ||
| NewRemoteHost string, | ||
| NewExternalPort uint16, | ||
| NewProtocol string, | ||
| NewInternalPort uint16, | ||
| NewInternalClient string, | ||
| NewEnabled bool, | ||
| NewPortMappingDescription string, | ||
| NewLeaseDuration uint32, | ||
| ) (err error) | ||
|
|
||
| GetExternalIPAddress() ( | ||
| NewExternalIPAddress string, | ||
| err error, | ||
| ) | ||
| } | ||
|
|
||
| func PickRouterClient(ctx context.Context) (RouterClient, error) { | ||
| tasks, _ := errgroup.WithContext(ctx) | ||
| // Request each type of client in parallel, and return what is found. | ||
| var ip1Clients []*internetgateway2.WANIPConnection1 | ||
| tasks.Go(func() error { | ||
| var err error | ||
| ip1Clients, _, err = internetgateway2.NewWANIPConnection1Clients() | ||
| return err | ||
| }) | ||
| var ip2Clients []*internetgateway2.WANIPConnection2 | ||
| tasks.Go(func() error { | ||
| var err error | ||
| ip2Clients, _, err = internetgateway2.NewWANIPConnection2Clients() | ||
| return err | ||
| }) | ||
| var ppp1Clients []*internetgateway2.WANPPPConnection1 | ||
| tasks.Go(func() error { | ||
| var err error | ||
| ppp1Clients, _, err = internetgateway2.NewWANPPPConnection1Clients() | ||
| return err | ||
| }) | ||
|
|
||
| if err := tasks.Wait(); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| // Trivial handling for where we find exactly one device to talk to, you | ||
| // might want to provide more flexible handling than this if multiple | ||
| // devices are found. | ||
| switch { | ||
| case len(ip2Clients) == 1: | ||
| return ip2Clients[0], nil | ||
| case len(ip1Clients) == 1: | ||
| return ip1Clients[0], nil | ||
| case len(ppp1Clients) == 1: | ||
| return ppp1Clients[0], nil | ||
| default: | ||
| return nil, errors.New("multiple or no services found") | ||
| } | ||
| } | ||
|
|
||
| func UPNP_ForwardPort(ctx context.Context, | ||
| NewRemoteHost string, | ||
| NewExternalPort uint16, | ||
| NewProtocol string, | ||
| NewInternalPort uint16, | ||
| NewInternalClient string, | ||
| NewPortMappingDescription string, | ||
| NewLeaseDuration uint32, | ||
| ) error { | ||
| client, err := PickRouterClient(ctx) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| return client.AddPortMapping( | ||
| NewRemoteHost, | ||
| // External port number to expose to Internet: | ||
| NewExternalPort, | ||
| // Forward TCP (this could be "UDP" if we wanted that instead). | ||
| NewProtocol, | ||
| // Internal port number on the LAN to forward to. | ||
| // Some routers might not support this being different to the external | ||
| // port number. | ||
| NewInternalPort, | ||
| // Internal address on the LAN we want to forward to. | ||
| NewInternalClient, | ||
| // Enabled: | ||
| true, | ||
| // Informational description for the client requesting the port forwarding. | ||
| NewPortMappingDescription, | ||
| // How long should the port forward last for in seconds. | ||
| // If you want to keep it open for longer and potentially across router | ||
| // resets, you might want to periodically request before this elapses. | ||
| NewLeaseDuration, | ||
| ) | ||
| } | ||
|
|
||
| func AskForMapping(xl *xlog.Logger, remoteGetAddrs []string, localIps []string, localAddr net.Addr, description string) { | ||
|
|
||
| xl.Tracef("makeRouterToNatThisHole: %v, localIps %v, localAddr=%v", remoteGetAddrs, localIps, localAddr.String()) | ||
|
|
||
| targetAddr := remoteGetAddrs[0] | ||
| remoteAddrPort, err := netip.ParseAddrPort(targetAddr) | ||
| if err != nil { | ||
| xl.Errorf("netip.ParseAddrPort error: %v. parse: %v", err, targetAddr) | ||
| return | ||
| } | ||
|
|
||
| localAddrStr := localAddr.String() | ||
| localAddrPort, err := netip.ParseAddrPort(localAddrStr) | ||
| if err != nil { | ||
| xl.Errorf("netip.ParseAddrPort local error: %v. parse: %v", err, localAddrStr) | ||
|
|
||
| return | ||
| } | ||
|
|
||
| targetForwardTo := "" | ||
| if len(localIps) == 1 { | ||
| targetForwardTo = localIps[1] | ||
| } else { | ||
| targetForwardToIp, err := gateway.DiscoverInterface() | ||
| if err != nil { | ||
| xl.Warnf("load Default interface error:%v", err) | ||
| } else { | ||
| targetForwardTo = targetForwardToIp.String() | ||
| } | ||
| } | ||
|
|
||
| if targetForwardTo == "" && len(localIps) > 1 { | ||
| targetForwardTo = localIps[0] | ||
| } | ||
|
|
||
| ctx, _ := context.WithTimeout(context.Background(), 50*time.Millisecond) | ||
|
|
||
| xl.Infof("UPNP_ForwardPort: remoteAddrPort=%v, localAddrPort=%v, targetForwardToLocal=%v", remoteAddrPort, localAddrPort, targetForwardTo) | ||
| err = UPNP_ForwardPort( | ||
| ctx, | ||
| /*NewRemoteHost*/ remoteAddrPort.Addr().String(), | ||
| /*NewExternalPort*/ remoteAddrPort.Port(), | ||
| /*NewProtocol*/ "UDP", | ||
|
|
||
| /*NewInternalPort*/ | ||
| localAddrPort.Port(), | ||
| /*NewInternalClient*/ targetForwardTo, | ||
| /*NewPortMappingDescription*/ description, | ||
| /*NewLeaseDuration*/ 360, | ||
| ) | ||
| if err != nil { | ||
| xl.Warnf("UPNP_ForwardPort error: %v.", err) | ||
|
|
||
| return | ||
| } | ||
|
|
||
| xl.Tracef("UPNP_ForwardPort done") | ||
|
|
||
| } |