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@ -7,6 +7,7 @@ import ( |
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"time" |
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cmn "github.com/tendermint/tmlibs/common" |
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"github.com/tendermint/tmlibs/log" |
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) |
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type UPNPCapabilities struct { |
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@ -14,24 +15,24 @@ type UPNPCapabilities struct { |
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Hairpin bool |
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} |
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func makeUPNPListener(intPort int, extPort int) (NAT, net.Listener, net.IP, error) { |
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func makeUPNPListener(intPort int, extPort int, logger log.Logger) (NAT, net.Listener, net.IP, error) { |
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nat, err := Discover() |
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if err != nil { |
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return nil, nil, nil, errors.New(fmt.Sprintf("NAT upnp could not be discovered: %v", err)) |
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} |
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log.Info(cmn.Fmt("ourIP: %v", nat.(*upnpNAT).ourIP)) |
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logger.Info(cmn.Fmt("ourIP: %v", nat.(*upnpNAT).ourIP)) |
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ext, err := nat.GetExternalAddress() |
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if err != nil { |
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return nat, nil, nil, errors.New(fmt.Sprintf("External address error: %v", err)) |
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} |
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log.Info(cmn.Fmt("External address: %v", ext)) |
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logger.Info(cmn.Fmt("External address: %v", ext)) |
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port, err := nat.AddPortMapping("tcp", extPort, intPort, "Tendermint UPnP Probe", 0) |
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if err != nil { |
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return nat, nil, ext, errors.New(fmt.Sprintf("Port mapping error: %v", err)) |
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} |
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log.Info(cmn.Fmt("Port mapping mapped: %v", port)) |
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logger.Info(cmn.Fmt("Port mapping mapped: %v", port)) |
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// also run the listener, open for all remote addresses.
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listener, err := net.Listen("tcp", fmt.Sprintf(":%v", intPort)) |
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@ -41,22 +42,22 @@ func makeUPNPListener(intPort int, extPort int) (NAT, net.Listener, net.IP, erro |
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return nat, listener, ext, nil |
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} |
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func testHairpin(listener net.Listener, extAddr string) (supportsHairpin bool) { |
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func testHairpin(listener net.Listener, extAddr string, logger log.Logger) (supportsHairpin bool) { |
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// Listener
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go func() { |
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inConn, err := listener.Accept() |
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if err != nil { |
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log.Notice(cmn.Fmt("Listener.Accept() error: %v", err)) |
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logger.Info(cmn.Fmt("Listener.Accept() error: %v", err)) |
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return |
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} |
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log.Info(cmn.Fmt("Accepted incoming connection: %v -> %v", inConn.LocalAddr(), inConn.RemoteAddr())) |
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logger.Info(cmn.Fmt("Accepted incoming connection: %v -> %v", inConn.LocalAddr(), inConn.RemoteAddr())) |
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buf := make([]byte, 1024) |
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n, err := inConn.Read(buf) |
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if err != nil { |
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log.Notice(cmn.Fmt("Incoming connection read error: %v", err)) |
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logger.Info(cmn.Fmt("Incoming connection read error: %v", err)) |
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return |
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} |
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log.Info(cmn.Fmt("Incoming connection read %v bytes: %X", n, buf)) |
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logger.Info(cmn.Fmt("Incoming connection read %v bytes: %X", n, buf)) |
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if string(buf) == "test data" { |
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supportsHairpin = true |
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return |
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@ -66,28 +67,28 @@ func testHairpin(listener net.Listener, extAddr string) (supportsHairpin bool) { |
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// Establish outgoing
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outConn, err := net.Dial("tcp", extAddr) |
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if err != nil { |
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log.Notice(cmn.Fmt("Outgoing connection dial error: %v", err)) |
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logger.Info(cmn.Fmt("Outgoing connection dial error: %v", err)) |
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return |
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} |
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n, err := outConn.Write([]byte("test data")) |
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if err != nil { |
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log.Notice(cmn.Fmt("Outgoing connection write error: %v", err)) |
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logger.Info(cmn.Fmt("Outgoing connection write error: %v", err)) |
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return |
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} |
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log.Info(cmn.Fmt("Outgoing connection wrote %v bytes", n)) |
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logger.Info(cmn.Fmt("Outgoing connection wrote %v bytes", n)) |
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// Wait for data receipt
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time.Sleep(1 * time.Second) |
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return |
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} |
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func Probe() (caps UPNPCapabilities, err error) { |
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log.Info("Probing for UPnP!") |
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func Probe(logger log.Logger) (caps UPNPCapabilities, err error) { |
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logger.Info("Probing for UPnP!") |
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intPort, extPort := 8001, 8001 |
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nat, listener, ext, err := makeUPNPListener(intPort, extPort) |
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nat, listener, ext, err := makeUPNPListener(intPort, extPort, logger) |
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if err != nil { |
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return |
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} |
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@ -97,12 +98,12 @@ func Probe() (caps UPNPCapabilities, err error) { |
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defer func() { |
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err = nat.DeletePortMapping("tcp", intPort, extPort) |
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if err != nil { |
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log.Warn(cmn.Fmt("Port mapping delete error: %v", err)) |
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logger.Error(cmn.Fmt("Port mapping delete error: %v", err)) |
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} |
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listener.Close() |
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}() |
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supportsHairpin := testHairpin(listener, fmt.Sprintf("%v:%v", ext, extPort)) |
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supportsHairpin := testHairpin(listener, fmt.Sprintf("%v:%v", ext, extPort), logger) |
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if supportsHairpin { |
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caps.Hairpin = true |
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} |
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