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p2p/discover: map listening port using configured mechanism

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This commit is contained in:
Felix Lange
2015-02-13 11:38:34 +01:00
parent 82f0bd9009
commit 170eb3ac68
4 changed files with 35 additions and 18 deletions
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23
p2p/discover/udp.go
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@ -10,6 +10,7 @@ import (
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/p2p/nat"
"github.com/ethereum/go-ethereum/rlp"
)
@ -82,6 +83,7 @@ type udp struct {
addpending chan *pending
replies chan reply
closing chan struct{}
nat nat.Interface
*Table
}
@ -121,17 +123,26 @@ type reply struct {
}
// ListenUDP returns a new table that listens for UDP packets on laddr.
func ListenUDP(priv *ecdsa.PrivateKey, laddr string) (*Table, error) {
net, realaddr, err := listen(priv, laddr)
func ListenUDP(priv *ecdsa.PrivateKey, laddr string, natm nat.Interface) (*Table, error) {
t, realaddr, err := listen(priv, laddr, natm)
if err != nil {
return nil, err
}
net.Table = newTable(net, PubkeyID(&priv.PublicKey), realaddr)
log.Debugf("Listening, %v\n", net.self)
return net.Table, nil
if natm != nil {
if !realaddr.IP.IsLoopback() {
go nat.Map(natm, t.closing, "udp", realaddr.Port, realaddr.Port, "ethereum discovery")
}
// TODO: react to external IP changes over time.
if ext, err := natm.ExternalIP(); err == nil {
realaddr = &net.UDPAddr{IP: ext, Port: realaddr.Port}
}
}
t.Table = newTable(t, PubkeyID(&priv.PublicKey), realaddr)
log.Infoln("Listening, ", t.self)
return t.Table, nil
}
func listen(priv *ecdsa.PrivateKey, laddr string) (*udp, *net.UDPAddr, error) {
func listen(priv *ecdsa.PrivateKey, laddr string, nat nat.Interface) (*udp, *net.UDPAddr, error) {
addr, err := net.ResolveUDPAddr("udp", laddr)
if err != nil {
return nil, nil, err