torrent/peer_protocol/pex.go

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package peer_protocol
import (
"github.com/anacrolix/dht/v2/krpc"
"github.com/anacrolix/torrent/bencode"
)
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type PexMsg struct {
Added krpc.CompactIPv4NodeAddrs `bencode:"added"`
AddedFlags []PexPeerFlags `bencode:"added.f"`
Added6 krpc.CompactIPv6NodeAddrs `bencode:"added6"`
Added6Flags []PexPeerFlags `bencode:"added6.f"`
Dropped krpc.CompactIPv4NodeAddrs `bencode:"dropped"`
Dropped6 krpc.CompactIPv6NodeAddrs `bencode:"dropped6"`
}
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func (m *PexMsg) Len() int {
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return len(m.Added) + len(m.Added6) + len(m.Dropped) + len(m.Dropped6)
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}
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func (m *PexMsg) Message(pexExtendedId ExtensionNumber) Message {
payload := bencode.MustMarshal(m)
return Message{
Type: Extended,
ExtendedID: pexExtendedId,
ExtendedPayload: payload,
}
}
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func LoadPexMsg(b []byte) (ret PexMsg, err error) {
err = bencode.Unmarshal(b, &ret)
return
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}
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type PexPeerFlags byte
func (me PexPeerFlags) Get(f PexPeerFlags) bool {
return me&f == f
}
const (
PexPrefersEncryption PexPeerFlags = 1 << iota
PexSeedUploadOnly
PexSupportsUtp
PexHolepunchSupport
PexOutgoingConn
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)