func renewUPnP(port int) {
for {
opts := cfg.Options()
time.Sleep(time.Duration(opts.UPnPRenewal) * time.Minute)
igd, err := upnp.Discover()
if err != nil {
continue
}
// Just renew the same port that we already have
if externalPort != 0 {
err = igd.AddPortMapping(upnp.TCP, externalPort, port, "syncthing", opts.UPnPLease*60)
if err == nil {
l.Infoln("Renewed UPnP port mapping - external port", externalPort)
continue
}
}
// Something strange has happened. We didn't have an external port before?
// Or perhaps the gateway has changed?
// Retry the same port sequence from the beginning.
r := setupExternalPort(igd, port)
if r != 0 {
externalPort = r
l.Infoln("Updated UPnP port mapping - external port", externalPort)
discoverer.StopGlobal()
discoverer.StartGlobal(opts.GlobalAnnServer, uint16(r))
continue
}
l.Warnln("Failed to update UPnP port mapping - external port", externalPort)
}
}
func setupUPnP() {
if opts := cfg.Options(); len(opts.ListenAddress) == 1 {
_, portStr, err := net.SplitHostPort(opts.ListenAddress[0])
if err != nil {
l.Warnln("Bad listen address:", err)
} else {
// Set up incoming port forwarding, if necessary and possible
port, _ := strconv.Atoi(portStr)
igds := upnp.Discover()
if len(igds) > 0 {
// Configure the first discovered IGD only. This is a work-around until we have a better mechanism
// for handling multiple IGDs, which will require changes to the global discovery service
igd = &igds[0]
externalPort = setupExternalPort(igd, port)
if externalPort == 0 {
l.Warnln("Failed to create UPnP port mapping")
} else {
l.Infof("Created UPnP port mapping for external port %d on UPnP device %s.", externalPort, igd.FriendlyIdentifier())
if opts.UPnPRenewal > 0 {
go renewUPnP(port)
}
}
}
}
} else {
l.Warnln("Multiple listening addresses; not attempting UPnP port mapping")
}
}
func setupUPnP() {
if opts := cfg.Options(); len(opts.ListenAddress) == 1 {
_, portStr, err := net.SplitHostPort(opts.ListenAddress[0])
if err != nil {
l.Warnln("Bad listen address:", err)
} else {
// Set up incoming port forwarding, if necessary and possible
port, _ := strconv.Atoi(portStr)
igd, err := upnp.Discover()
if err == nil {
externalPort = setupExternalPort(igd, port)
if externalPort == 0 {
l.Warnln("Failed to create UPnP port mapping")
} else {
l.Infoln("Created UPnP port mapping - external port", externalPort)
}
} else {
l.Infof("No UPnP gateway detected")
if debugNet {
l.Debugf("UPnP: %v", err)
}
}
if opts.UPnPRenewal > 0 {
go renewUPnP(port)
}
}
} else {
l.Warnln("Multiple listening addresses; not attempting UPnP port mapping")
}
}
func renewUPnP(port int) {
for {
opts := cfg.Options()
time.Sleep(time.Duration(opts.UPnPRenewal) * time.Minute)
// Make sure our IGD reference isn't nil
if igd == nil {
if debugNet {
l.Debugln("Undefined IGD during UPnP port renewal. Re-discovering...")
}
igds := upnp.Discover()
if len(igds) > 0 {
// Configure the first discovered IGD only. This is a work-around until we have a better mechanism
// for handling multiple IGDs, which will require changes to the global discovery service
igd = &igds[0]
} else {
if debugNet {
l.Debugln("Failed to discover IGD during UPnP port mapping renewal.")
}
continue
}
}
// Just renew the same port that we already have
if externalPort != 0 {
err := igd.AddPortMapping(upnp.TCP, externalPort, port, "syncthing", opts.UPnPLease*60)
if err != nil {
l.Warnf("Error renewing UPnP port mapping for external port %d on device %s: %s", externalPort, igd.FriendlyIdentifier(), err.Error())
} else if debugNet {
l.Debugf("Renewed UPnP port mapping for external port %d on device %s.", externalPort, igd.FriendlyIdentifier())
}
continue
}
// Something strange has happened. We didn't have an external port before?
// Or perhaps the gateway has changed?
// Retry the same port sequence from the beginning.
if debugNet {
l.Debugln("No UPnP port mapping defined, updating...")
}
forwardedPort := setupExternalPort(igd, port)
if forwardedPort != 0 {
externalPort = forwardedPort
discoverer.StopGlobal()
discoverer.StartGlobal(opts.GlobalAnnServers, uint16(forwardedPort))
if debugNet {
l.Debugf("Updated UPnP port mapping for external port %d on device %s.", forwardedPort, igd.FriendlyIdentifier())
}
} else {
l.Warnf("Failed to update UPnP port mapping for external port on device " + igd.FriendlyIdentifier() + ".")
}
}
}
