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package main
import (
"fmt"
"github.com/katalix/go-l2tp/l2tp"
"golang.org/x/sys/unix"
)
var _ pseudowire = (*pppBridge)(nil)
type pppBridge struct {
session l2tp.Session
pppoe, pppol2tp *pppChannel
}
func newPPPBridge(session l2tp.Session, tunnelID, sessionID, peerTunnelID, peerSessionID l2tp.ControlConnID, pppoeSessionID uint16, pppoePeerMAC [6]byte, pppoeInterfaceName string) (*pppBridge, error) {
pppoeSk, err := socketPPPoE(pppoeSessionID, pppoePeerMAC, pppoeInterfaceName)
if err != nil {
return nil, fmt.Errorf("failed to create PPPoE socket: %v", err)
}
pppoeChan, err := newPPPChannel(pppoeSk)
if err != nil {
unix.Close(pppoeSk)
return nil, fmt.Errorf("failed to create PPPoE channel: %v", err)
}
pppol2tpSk, err := socketPPPoL2TPv4(tunnelID, sessionID, peerTunnelID, peerSessionID)
if err != nil {
pppoeChan.close()
return nil, fmt.Errorf("failed to create PPPoL2TP socket: %v", err)
}
pppol2tpChan, err := newPPPChannel(pppol2tpSk)
if err != nil {
pppoeChan.close()
return nil, fmt.Errorf("failed to create PPPoL2TP channel: %v", err)
}
err = pppoeChan.bridge(pppol2tpChan)
if err != nil {
pppoeChan.close()
pppol2tpChan.close()
return nil, fmt.Errorf("failed to bridge PPPoE to PPPoL2TP channel: %v", err)
}
return &pppBridge{
session: session,
pppoe: pppoeChan,
pppol2tp: pppol2tpChan,
}, nil
}
func (pb *pppBridge) close() {
if pb.pppoe != nil {
pb.pppoe.close()
}
if pb.pppol2tp != nil {
pb.pppol2tp.close()
}
}
func (pb *pppBridge) getSession() l2tp.Session {
return pb.session
}
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