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portmapping.go
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portmapping.go
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package upnp
import (
"sync"
"time"
log "github.com/Sirupsen/logrus"
)
type portMapping struct {
info *PortMappingInfo
stopCh chan int
waitStopped sync.WaitGroup
}
func newPortMapping(info *PortMappingInfo) *portMapping {
m := &portMapping{
info: info,
stopCh: make(chan int),
}
return m
}
func (m *portMapping) stop() {
close(m.stopCh)
m.waitStopped.Wait()
DeleteUpnpTcpPortMapping(m.info.IGDServer, m.info.ExternalPort)
log.Infof("delete port mapping :%d -> %s",
m.info.ExternalPort, m.info.internalAddr())
}
func (m *portMapping) servLoop() {
ticker := time.NewTicker(time.Second * 120)
defer ticker.Stop()
defer m.waitStopped.Done()
for {
m.ensureUpnpPortMapping()
select {
case <-m.stopCh:
return
case <-ticker.C:
}
}
}
func (m *portMapping) ensureUpnpPortMapping() (string, error) {
return AddUpnpTcpPortMapping(m.info.IGDServer, m.info.ExternalPort,
m.info.InternalIP, m.info.InternalPort)
}
func (m *portMapping) start() error {
externalIP, err := m.ensureUpnpPortMapping()
if err != nil {
return err
}
log.Infof("new port mapping %s:%d -> %s", externalIP,
m.info.ExternalPort,
m.info.internalAddr())
m.info.ExternalIP = externalIP
m.waitStopped.Add(1)
go m.servLoop()
return nil
}