YTSFlix_Go/vendor/github.com/anacrolix/torrent/portfwd.go

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2018-11-04 14:58:15 +00:00
package torrent
import (
"log"
"time"
flog "github.com/anacrolix/log"
"github.com/elgatito/upnp"
)
func addPortMapping(d upnp.Device, proto upnp.Protocol, internalPort int, debug bool) {
externalPort, err := d.AddPortMapping(proto, internalPort, internalPort, "anacrolix/torrent", 0)
if err != nil {
log.Printf("error adding %s port mapping: %s", proto, err)
} else if externalPort != internalPort {
log.Printf("external port %d does not match internal port %d in port mapping", externalPort, internalPort)
} else if debug {
log.Printf("forwarded external %s port %d", proto, externalPort)
}
}
func (cl *Client) forwardPort() {
cl.lock()
defer cl.unlock()
if cl.config.NoDefaultPortForwarding {
return
}
cl.unlock()
ds := upnp.Discover(0, 2*time.Second)
cl.lock()
flog.Default.Handle(flog.Fmsg("discovered %d upnp devices", len(ds)))
port := cl.incomingPeerPort()
cl.unlock()
for _, d := range ds {
go addPortMapping(d, upnp.TCP, port, cl.config.Debug)
go addPortMapping(d, upnp.UDP, port, cl.config.Debug)
}
cl.lock()
}