mirror of https://github.com/poanetwork/quorum.git
56 lines
1.6 KiB
Go
56 lines
1.6 KiB
Go
package p2p
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"time"
|
|
|
|
natpmp "github.com/jackpal/go-nat-pmp"
|
|
)
|
|
|
|
// Adapt the NAT-PMP protocol to the NAT interface
|
|
|
|
// TODO:
|
|
// + Register for changes to the external address.
|
|
// + Re-register port mapping when router reboots.
|
|
// + A mechanism for keeping a port mapping registered.
|
|
// + Discover gateway address automatically.
|
|
|
|
type natPMPClient struct {
|
|
client *natpmp.Client
|
|
}
|
|
|
|
// PMP returns a NAT traverser that uses NAT-PMP. The provided gateway
|
|
// address should be the IP of your router.
|
|
func PMP(gateway net.IP) (nat NAT) {
|
|
return &natPMPClient{natpmp.NewClient(gateway)}
|
|
}
|
|
|
|
func (*natPMPClient) String() string {
|
|
return "NAT-PMP"
|
|
}
|
|
|
|
func (n *natPMPClient) GetExternalAddress() (net.IP, error) {
|
|
response, err := n.client.GetExternalAddress()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return response.ExternalIPAddress[:], nil
|
|
}
|
|
|
|
func (n *natPMPClient) AddPortMapping(protocol string, extport, intport int, name string, lifetime time.Duration) error {
|
|
if lifetime <= 0 {
|
|
return fmt.Errorf("lifetime must not be <= 0")
|
|
}
|
|
// Note order of port arguments is switched between our AddPortMapping and the client's AddPortMapping.
|
|
_, err := n.client.AddPortMapping(protocol, intport, extport, int(lifetime/time.Second))
|
|
return err
|
|
}
|
|
|
|
func (n *natPMPClient) DeletePortMapping(protocol string, externalPort, internalPort int) (err error) {
|
|
// To destroy a mapping, send an add-port with
|
|
// an internalPort of the internal port to destroy, an external port of zero and a time of zero.
|
|
_, err = n.client.AddPortMapping(protocol, internalPort, 0, 0)
|
|
return
|
|
}
|