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