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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019-2021 WireGuard LLC. All Rights Reserved.
*/
package manager
import (
"net"
"sync"
"golang.org/x/sys/windows"
"golang.zx2c4.com/wireguard/ipc/winpipe"
"golang.zx2c4.com/wireguard/windows/services"
)
type connectedTunnel struct {
net.Conn
sync.Mutex
}
var connectedTunnelServicePipes = make(map[string]*connectedTunnel)
var connectedTunnelServicePipesLock sync.RWMutex
func connectTunnelServicePipe(tunnelName string) (*connectedTunnel, error) {
connectedTunnelServicePipesLock.RLock()
pipe, ok := connectedTunnelServicePipes[tunnelName]
if ok {
pipe.Lock()
connectedTunnelServicePipesLock.RUnlock()
return pipe, nil
}
connectedTunnelServicePipesLock.RUnlock()
connectedTunnelServicePipesLock.Lock()
defer connectedTunnelServicePipesLock.Unlock()
pipe, ok = connectedTunnelServicePipes[tunnelName]
if ok {
pipe.Lock()
return pipe, nil
}
pipePath, err := services.PipePathOfTunnel(tunnelName)
if err != nil {
return nil, err
}
localSystem, err := windows.CreateWellKnownSid(windows.WinLocalSystemSid)
if err != nil {
return nil, err
}
pipe = &connectedTunnel{}
pipe.Conn, err = winpipe.DialPipe(pipePath, nil, localSystem)
if err != nil {
return nil, err
}
connectedTunnelServicePipes[tunnelName] = pipe
pipe.Lock()
return pipe, nil
}
func disconnectTunnelServicePipe(tunnelName string) {
connectedTunnelServicePipesLock.Lock()
defer connectedTunnelServicePipesLock.Unlock()
pipe, ok := connectedTunnelServicePipes[tunnelName]
if !ok {
return
}
pipe.Lock()
pipe.Close()
delete(connectedTunnelServicePipes, tunnelName)
pipe.Unlock()
}
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