Added code from windows branch
This commit is contained in:
Mathias Hall-Andersen
parent
eafa3df606
commit
6f5ef153c3
6
src/build.cmd
Executable file
6
src/build.cmd
Executable file
@ -0,0 +1,6 @@
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@echo off
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REM builds wireguard for windows
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go get
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go build -o wireguard-go.exe
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@ -6,6 +6,6 @@ import (
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"net"
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)
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func setFwmark(conn *net.UDPConn, value int) error {
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func setMark(conn *net.UDPConn, value int) error {
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return nil
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}
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34
src/daemon_windows.go
Normal file
34
src/daemon_windows.go
Normal file
@ -0,0 +1,34 @@
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package main
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import (
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"os"
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)
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/* Daemonizes the process on windows
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*
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* This is done by spawning and releasing a copy with the --foreground flag
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*/
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func Daemonize() error {
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argv := []string{os.Args[0], "--foreground"}
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argv = append(argv, os.Args[1:]...)
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attr := &os.ProcAttr{
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Dir: ".",
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Env: os.Environ(),
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Files: []*os.File{
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os.Stdin,
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nil,
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nil,
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},
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}
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process, err := os.StartProcess(
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argv[0],
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argv,
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attr,
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)
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if err != nil {
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return err
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}
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process.Release()
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return nil
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}
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672
src/timers.go
672
src/timers.go
@ -1,336 +1,336 @@
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package main
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import (
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"bytes"
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"encoding/binary"
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"golang.org/x/crypto/blake2s"
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"math/rand"
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"sync/atomic"
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"time"
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)
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/* Called when a new authenticated message has been send
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*
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*/
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func (peer *Peer) KeepKeyFreshSending() {
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kp := peer.keyPairs.Current()
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if kp == nil {
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return
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}
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nonce := atomic.LoadUint64(&kp.sendNonce)
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if nonce > RekeyAfterMessages {
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signalSend(peer.signal.handshakeBegin)
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}
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if kp.isInitiator && time.Now().Sub(kp.created) > RekeyAfterTime {
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signalSend(peer.signal.handshakeBegin)
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}
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}
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/* Called when a new authenticated message has been recevied
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*
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*/
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func (peer *Peer) KeepKeyFreshReceiving() {
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// TODO: Add a guard, clear on handshake complete (clear in TimerHandshakeComplete)
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kp := peer.keyPairs.Current()
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if kp == nil {
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return
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}
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if !kp.isInitiator {
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return
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}
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nonce := atomic.LoadUint64(&kp.sendNonce)
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send := nonce > RekeyAfterMessages || time.Now().Sub(kp.created) > RekeyAfterTimeReceiving
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if send {
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signalSend(peer.signal.handshakeBegin)
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}
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}
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/* Queues a keep-alive if no packets are queued for peer
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*/
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func (peer *Peer) SendKeepAlive() bool {
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elem := peer.device.NewOutboundElement()
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elem.packet = nil
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if len(peer.queue.nonce) == 0 {
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select {
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case peer.queue.nonce <- elem:
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return true
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default:
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return false
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}
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}
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return true
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}
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/* Event:
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* Sent non-empty (authenticated) transport message
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*/
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func (peer *Peer) TimerDataSent() {
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timerStop(peer.timer.keepalivePassive)
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if !peer.timer.pendingNewHandshake {
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peer.timer.pendingNewHandshake = true
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peer.timer.newHandshake.Reset(NewHandshakeTime)
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}
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}
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/* Event:
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* Received non-empty (authenticated) transport message
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*/
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func (peer *Peer) TimerDataReceived() {
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if peer.timer.pendingKeepalivePassive {
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peer.timer.needAnotherKeepalive = true
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return
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}
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peer.timer.pendingKeepalivePassive = false
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peer.timer.keepalivePassive.Reset(KeepaliveTimeout)
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}
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/* Event:
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* Any (authenticated) packet received
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*/
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func (peer *Peer) TimerAnyAuthenticatedPacketReceived() {
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timerStop(peer.timer.newHandshake)
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}
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/* Event:
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* Any authenticated packet send / received.
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*/
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func (peer *Peer) TimerAnyAuthenticatedPacketTraversal() {
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interval := atomic.LoadUint64(&peer.persistentKeepaliveInterval)
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if interval > 0 {
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duration := time.Duration(interval) * time.Second
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peer.timer.keepalivePersistent.Reset(duration)
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}
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}
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/* Called after succesfully completing a handshake.
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* i.e. after:
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*
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* - Valid handshake response
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* - First transport message under the "next" key
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*/
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func (peer *Peer) TimerHandshakeComplete() {
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atomic.StoreInt64(
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&peer.stats.lastHandshakeNano,
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time.Now().UnixNano(),
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)
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signalSend(peer.signal.handshakeCompleted)
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peer.device.log.Info.Println("Negotiated new handshake for", peer.String())
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}
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/* Event:
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* An ephemeral key is generated
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*
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* i.e after:
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*
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* CreateMessageInitiation
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* CreateMessageResponse
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*
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* Schedules the deletion of all key material
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* upon failure to complete a handshake
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*/
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func (peer *Peer) TimerEphemeralKeyCreated() {
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peer.timer.zeroAllKeys.Reset(RejectAfterTime * 3)
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}
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func (peer *Peer) RoutineTimerHandler() {
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device := peer.device
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indices := &device.indices
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logDebug := device.log.Debug
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logDebug.Println("Routine, timer handler, started for peer", peer.String())
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for {
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select {
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case <-peer.signal.stop:
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return
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// keep-alives
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case <-peer.timer.keepalivePersistent.C:
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interval := atomic.LoadUint64(&peer.persistentKeepaliveInterval)
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if interval > 0 {
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logDebug.Println("Sending keep-alive to", peer.String())
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peer.SendKeepAlive()
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}
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case <-peer.timer.keepalivePassive.C:
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logDebug.Println("Sending keep-alive to", peer.String())
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peer.SendKeepAlive()
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if peer.timer.needAnotherKeepalive {
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peer.timer.keepalivePassive.Reset(KeepaliveTimeout)
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peer.timer.needAnotherKeepalive = false
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}
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// unresponsive session
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case <-peer.timer.newHandshake.C:
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logDebug.Println("Retrying handshake with", peer.String(), "due to lack of reply")
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signalSend(peer.signal.handshakeBegin)
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// clear key material
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case <-peer.timer.zeroAllKeys.C:
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logDebug.Println("Clearing all key material for", peer.String())
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hs := &peer.handshake
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hs.mutex.Lock()
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kp := &peer.keyPairs
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kp.mutex.Lock()
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// unmap indecies
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indices.mutex.Lock()
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if kp.previous != nil {
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delete(indices.table, kp.previous.localIndex)
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}
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if kp.current != nil {
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delete(indices.table, kp.current.localIndex)
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}
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if kp.next != nil {
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delete(indices.table, kp.next.localIndex)
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}
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delete(indices.table, hs.localIndex)
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indices.mutex.Unlock()
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// zero out key pairs (TODO: better than wait for GC)
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kp.current = nil
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kp.previous = nil
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kp.next = nil
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kp.mutex.Unlock()
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// zero out handshake
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hs.localIndex = 0
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hs.localEphemeral = NoisePrivateKey{}
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hs.remoteEphemeral = NoisePublicKey{}
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hs.chainKey = [blake2s.Size]byte{}
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hs.hash = [blake2s.Size]byte{}
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hs.mutex.Unlock()
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}
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}
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}
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/* This is the state machine for handshake initiation
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*
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* Associated with this routine is the signal "handshakeBegin"
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* The routine will read from the "handshakeBegin" channel
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* at most every RekeyTimeout seconds
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*/
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func (peer *Peer) RoutineHandshakeInitiator() {
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device := peer.device
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logInfo := device.log.Info
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logError := device.log.Error
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logDebug := device.log.Debug
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logDebug.Println("Routine, handshake initator, started for", peer.String())
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var temp [256]byte
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for {
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// wait for signal
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select {
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case <-peer.signal.handshakeBegin:
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case <-peer.signal.stop:
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return
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}
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// set deadline
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BeginHandshakes:
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signalClear(peer.signal.handshakeReset)
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deadline := time.NewTimer(RekeyAttemptTime)
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AttemptHandshakes:
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for attempts := uint(1); ; attempts++ {
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// check if deadline reached
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select {
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case <-deadline.C:
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logInfo.Println("Handshake negotiation timed out for:", peer.String())
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signalSend(peer.signal.flushNonceQueue)
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timerStop(peer.timer.keepalivePersistent)
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break
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case <-peer.signal.stop:
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return
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default:
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}
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signalClear(peer.signal.handshakeCompleted)
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// create initiation message
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msg, err := peer.device.CreateMessageInitiation(peer)
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if err != nil {
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logError.Println("Failed to create handshake initiation message:", err)
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break AttemptHandshakes
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}
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jitter := time.Millisecond * time.Duration(rand.Uint32()%334)
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// marshal and send
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writer := bytes.NewBuffer(temp[:0])
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binary.Write(writer, binary.LittleEndian, msg)
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packet := writer.Bytes()
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peer.mac.AddMacs(packet)
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_, err = peer.SendBuffer(packet)
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if err != nil {
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logError.Println(
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"Failed to send handshake initiation message to",
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peer.String(), ":", err,
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)
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break
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}
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peer.TimerAnyAuthenticatedPacketTraversal()
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// set handshake timeout
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timeout := time.NewTimer(RekeyTimeout + jitter)
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logDebug.Println(
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"Handshake initiation attempt",
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attempts, "sent to", peer.String(),
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)
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// wait for handshake or timeout
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select {
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case <-peer.signal.stop:
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return
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case <-peer.signal.handshakeCompleted:
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<-timeout.C
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break AttemptHandshakes
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case <-peer.signal.handshakeReset:
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<-timeout.C
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goto BeginHandshakes
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case <-timeout.C:
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// TODO: Clear source address for peer
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continue
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}
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}
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// clear signal set in the meantime
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signalClear(peer.signal.handshakeBegin)
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}
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}
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package main
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import (
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"bytes"
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"encoding/binary"
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"golang.org/x/crypto/blake2s"
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"math/rand"
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"sync/atomic"
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"time"
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)
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/* Called when a new authenticated message has been send
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*
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*/
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func (peer *Peer) KeepKeyFreshSending() {
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kp := peer.keyPairs.Current()
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if kp == nil {
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return
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}
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nonce := atomic.LoadUint64(&kp.sendNonce)
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if nonce > RekeyAfterMessages {
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signalSend(peer.signal.handshakeBegin)
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}
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if kp.isInitiator && time.Now().Sub(kp.created) > RekeyAfterTime {
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signalSend(peer.signal.handshakeBegin)
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}
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}
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/* Called when a new authenticated message has been recevied
|
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*
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*/
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func (peer *Peer) KeepKeyFreshReceiving() {
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// TODO: Add a guard, clear on handshake complete (clear in TimerHandshakeComplete)
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kp := peer.keyPairs.Current()
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if kp == nil {
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return
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}
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if !kp.isInitiator {
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return
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}
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nonce := atomic.LoadUint64(&kp.sendNonce)
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send := nonce > RekeyAfterMessages || time.Now().Sub(kp.created) > RekeyAfterTimeReceiving
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if send {
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signalSend(peer.signal.handshakeBegin)
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}
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}
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/* Queues a keep-alive if no packets are queued for peer
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*/
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func (peer *Peer) SendKeepAlive() bool {
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elem := peer.device.NewOutboundElement()
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elem.packet = nil
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if len(peer.queue.nonce) == 0 {
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select {
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case peer.queue.nonce <- elem:
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return true
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default:
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return false
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}
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}
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return true
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}
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/* Event:
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* Sent non-empty (authenticated) transport message
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*/
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func (peer *Peer) TimerDataSent() {
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timerStop(peer.timer.keepalivePassive)
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if !peer.timer.pendingNewHandshake {
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peer.timer.pendingNewHandshake = true
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peer.timer.newHandshake.Reset(NewHandshakeTime)
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}
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}
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/* Event:
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* Received non-empty (authenticated) transport message
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*/
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func (peer *Peer) TimerDataReceived() {
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if peer.timer.pendingKeepalivePassive {
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peer.timer.needAnotherKeepalive = true
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return
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}
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peer.timer.pendingKeepalivePassive = false
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peer.timer.keepalivePassive.Reset(KeepaliveTimeout)
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}
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/* Event:
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* Any (authenticated) packet received
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*/
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func (peer *Peer) TimerAnyAuthenticatedPacketReceived() {
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timerStop(peer.timer.newHandshake)
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}
|
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|
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/* Event:
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* Any authenticated packet send / received.
|
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*/
|
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func (peer *Peer) TimerAnyAuthenticatedPacketTraversal() {
|
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interval := atomic.LoadUint64(&peer.persistentKeepaliveInterval)
|
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if interval > 0 {
|
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duration := time.Duration(interval) * time.Second
|
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peer.timer.keepalivePersistent.Reset(duration)
|
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}
|
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}
|
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|
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/* Called after succesfully completing a handshake.
|
||||
* i.e. after:
|
||||
*
|
||||
* - Valid handshake response
|
||||
* - First transport message under the "next" key
|
||||
*/
|
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func (peer *Peer) TimerHandshakeComplete() {
|
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atomic.StoreInt64(
|
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&peer.stats.lastHandshakeNano,
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time.Now().UnixNano(),
|
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)
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signalSend(peer.signal.handshakeCompleted)
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peer.device.log.Info.Println("Negotiated new handshake for", peer.String())
|
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}
|
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|
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/* Event:
|
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* An ephemeral key is generated
|
||||
*
|
||||
* i.e after:
|
||||
*
|
||||
* CreateMessageInitiation
|
||||
* CreateMessageResponse
|
||||
*
|
||||
* Schedules the deletion of all key material
|
||||
* upon failure to complete a handshake
|
||||
*/
|
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func (peer *Peer) TimerEphemeralKeyCreated() {
|
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peer.timer.zeroAllKeys.Reset(RejectAfterTime * 3)
|
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}
|
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|
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func (peer *Peer) RoutineTimerHandler() {
|
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device := peer.device
|
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indices := &device.indices
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|
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logDebug := device.log.Debug
|
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logDebug.Println("Routine, timer handler, started for peer", peer.String())
|
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|
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for {
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select {
|
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|
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case <-peer.signal.stop:
|
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return
|
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|
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// keep-alives
|
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|
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case <-peer.timer.keepalivePersistent.C:
|
||||
|
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interval := atomic.LoadUint64(&peer.persistentKeepaliveInterval)
|
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if interval > 0 {
|
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logDebug.Println("Sending keep-alive to", peer.String())
|
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peer.SendKeepAlive()
|
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}
|
||||
|
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case <-peer.timer.keepalivePassive.C:
|
||||
|
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logDebug.Println("Sending keep-alive to", peer.String())
|
||||
|
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peer.SendKeepAlive()
|
||||
|
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if peer.timer.needAnotherKeepalive {
|
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peer.timer.keepalivePassive.Reset(KeepaliveTimeout)
|
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peer.timer.needAnotherKeepalive = false
|
||||
}
|
||||
|
||||
// unresponsive session
|
||||
|
||||
case <-peer.timer.newHandshake.C:
|
||||
|
||||
logDebug.Println("Retrying handshake with", peer.String(), "due to lack of reply")
|
||||
|
||||
signalSend(peer.signal.handshakeBegin)
|
||||
|
||||
// clear key material
|
||||
|
||||
case <-peer.timer.zeroAllKeys.C:
|
||||
|
||||
logDebug.Println("Clearing all key material for", peer.String())
|
||||
|
||||
hs := &peer.handshake
|
||||
hs.mutex.Lock()
|
||||
|
||||
kp := &peer.keyPairs
|
||||
kp.mutex.Lock()
|
||||
|
||||
// unmap indecies
|
||||
|
||||
indices.mutex.Lock()
|
||||
if kp.previous != nil {
|
||||
delete(indices.table, kp.previous.localIndex)
|
||||
}
|
||||
if kp.current != nil {
|
||||
delete(indices.table, kp.current.localIndex)
|
||||
}
|
||||
if kp.next != nil {
|
||||
delete(indices.table, kp.next.localIndex)
|
||||
}
|
||||
delete(indices.table, hs.localIndex)
|
||||
indices.mutex.Unlock()
|
||||
|
||||
// zero out key pairs (TODO: better than wait for GC)
|
||||
|
||||
kp.current = nil
|
||||
kp.previous = nil
|
||||
kp.next = nil
|
||||
kp.mutex.Unlock()
|
||||
|
||||
// zero out handshake
|
||||
|
||||
hs.localIndex = 0
|
||||
hs.localEphemeral = NoisePrivateKey{}
|
||||
hs.remoteEphemeral = NoisePublicKey{}
|
||||
hs.chainKey = [blake2s.Size]byte{}
|
||||
hs.hash = [blake2s.Size]byte{}
|
||||
hs.mutex.Unlock()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* This is the state machine for handshake initiation
|
||||
*
|
||||
* Associated with this routine is the signal "handshakeBegin"
|
||||
* The routine will read from the "handshakeBegin" channel
|
||||
* at most every RekeyTimeout seconds
|
||||
*/
|
||||
func (peer *Peer) RoutineHandshakeInitiator() {
|
||||
device := peer.device
|
||||
|
||||
logInfo := device.log.Info
|
||||
logError := device.log.Error
|
||||
logDebug := device.log.Debug
|
||||
logDebug.Println("Routine, handshake initator, started for", peer.String())
|
||||
|
||||
var temp [256]byte
|
||||
|
||||
for {
|
||||
|
||||
// wait for signal
|
||||
|
||||
select {
|
||||
case <-peer.signal.handshakeBegin:
|
||||
case <-peer.signal.stop:
|
||||
return
|
||||
}
|
||||
|
||||
// set deadline
|
||||
|
||||
BeginHandshakes:
|
||||
|
||||
signalClear(peer.signal.handshakeReset)
|
||||
deadline := time.NewTimer(RekeyAttemptTime)
|
||||
|
||||
AttemptHandshakes:
|
||||
|
||||
for attempts := uint(1); ; attempts++ {
|
||||
|
||||
// check if deadline reached
|
||||
|
||||
select {
|
||||
case <-deadline.C:
|
||||
logInfo.Println("Handshake negotiation timed out for:", peer.String())
|
||||
signalSend(peer.signal.flushNonceQueue)
|
||||
timerStop(peer.timer.keepalivePersistent)
|
||||
break
|
||||
case <-peer.signal.stop:
|
||||
return
|
||||
default:
|
||||
}
|
||||
|
||||
signalClear(peer.signal.handshakeCompleted)
|
||||
|
||||
// create initiation message
|
||||
|
||||
msg, err := peer.device.CreateMessageInitiation(peer)
|
||||
if err != nil {
|
||||
logError.Println("Failed to create handshake initiation message:", err)
|
||||
break AttemptHandshakes
|
||||
}
|
||||
|
||||
jitter := time.Millisecond * time.Duration(rand.Uint32()%334)
|
||||
|
||||
// marshal and send
|
||||
|
||||
writer := bytes.NewBuffer(temp[:0])
|
||||
binary.Write(writer, binary.LittleEndian, msg)
|
||||
packet := writer.Bytes()
|
||||
peer.mac.AddMacs(packet)
|
||||
|
||||
_, err = peer.SendBuffer(packet)
|
||||
if err != nil {
|
||||
logError.Println(
|
||||
"Failed to send handshake initiation message to",
|
||||
peer.String(), ":", err,
|
||||
)
|
||||
continue
|
||||
}
|
||||
|
||||
peer.TimerAnyAuthenticatedPacketTraversal()
|
||||
|
||||
// set handshake timeout
|
||||
|
||||
timeout := time.NewTimer(RekeyTimeout + jitter)
|
||||
logDebug.Println(
|
||||
"Handshake initiation attempt",
|
||||
attempts, "sent to", peer.String(),
|
||||
)
|
||||
|
||||
// wait for handshake or timeout
|
||||
|
||||
select {
|
||||
|
||||
case <-peer.signal.stop:
|
||||
return
|
||||
|
||||
case <-peer.signal.handshakeCompleted:
|
||||
<-timeout.C
|
||||
break AttemptHandshakes
|
||||
|
||||
case <-peer.signal.handshakeReset:
|
||||
<-timeout.C
|
||||
goto BeginHandshakes
|
||||
|
||||
case <-timeout.C:
|
||||
// TODO: Clear source address for peer
|
||||
continue
|
||||
}
|
||||
}
|
||||
|
||||
// clear signal set in the meantime
|
||||
|
||||
signalClear(peer.signal.handshakeBegin)
|
||||
}
|
||||
}
|
||||
|
||||
475
src/tun_windows.go
Normal file
475
src/tun_windows.go
Normal file
@ -0,0 +1,475 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"encoding/binary"
|
||||
"errors"
|
||||
"fmt"
|
||||
"golang.org/x/sys/windows"
|
||||
"golang.org/x/sys/windows/registry"
|
||||
"net"
|
||||
"sync"
|
||||
"syscall"
|
||||
"time"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
/* Relies on the OpenVPN TAP-Windows driver (NDIS 6 version)
|
||||
*
|
||||
* https://github.com/OpenVPN/tap-windows
|
||||
*/
|
||||
|
||||
type NativeTUN struct {
|
||||
fd windows.Handle
|
||||
rl sync.Mutex
|
||||
wl sync.Mutex
|
||||
ro *windows.Overlapped
|
||||
wo *windows.Overlapped
|
||||
events chan TUNEvent
|
||||
name string
|
||||
}
|
||||
|
||||
const (
|
||||
METHOD_BUFFERED = 0
|
||||
ComponentID = "tap0901" // tap0801
|
||||
)
|
||||
|
||||
func ctl_code(device_type, function, method, access uint32) uint32 {
|
||||
return (device_type << 16) | (access << 14) | (function << 2) | method
|
||||
}
|
||||
|
||||
func TAP_CONTROL_CODE(request, method uint32) uint32 {
|
||||
return ctl_code(file_device_unknown, request, method, 0)
|
||||
}
|
||||
|
||||
var (
|
||||
errIfceNameNotFound = errors.New("Failed to find the name of interface")
|
||||
|
||||
TAP_IOCTL_GET_MAC = TAP_CONTROL_CODE(1, METHOD_BUFFERED)
|
||||
TAP_IOCTL_GET_VERSION = TAP_CONTROL_CODE(2, METHOD_BUFFERED)
|
||||
TAP_IOCTL_GET_MTU = TAP_CONTROL_CODE(3, METHOD_BUFFERED)
|
||||
TAP_IOCTL_GET_INFO = TAP_CONTROL_CODE(4, METHOD_BUFFERED)
|
||||
TAP_IOCTL_CONFIG_POINT_TO_POINT = TAP_CONTROL_CODE(5, METHOD_BUFFERED)
|
||||
TAP_IOCTL_SET_MEDIA_STATUS = TAP_CONTROL_CODE(6, METHOD_BUFFERED)
|
||||
TAP_IOCTL_CONFIG_DHCP_MASQ = TAP_CONTROL_CODE(7, METHOD_BUFFERED)
|
||||
TAP_IOCTL_GET_LOG_LINE = TAP_CONTROL_CODE(8, METHOD_BUFFERED)
|
||||
TAP_IOCTL_CONFIG_DHCP_SET_OPT = TAP_CONTROL_CODE(9, METHOD_BUFFERED)
|
||||
TAP_IOCTL_CONFIG_TUN = TAP_CONTROL_CODE(10, METHOD_BUFFERED)
|
||||
|
||||
file_device_unknown = uint32(0x00000022)
|
||||
nCreateEvent,
|
||||
nResetEvent,
|
||||
nGetOverlappedResult uintptr
|
||||
)
|
||||
|
||||
func init() {
|
||||
k32, err := windows.LoadLibrary("kernel32.dll")
|
||||
if err != nil {
|
||||
panic("LoadLibrary " + err.Error())
|
||||
}
|
||||
defer windows.FreeLibrary(k32)
|
||||
nCreateEvent = getProcAddr(k32, "CreateEventW")
|
||||
nResetEvent = getProcAddr(k32, "ResetEvent")
|
||||
nGetOverlappedResult = getProcAddr(k32, "GetOverlappedResult")
|
||||
}
|
||||
|
||||
/* implementation of the read/write/closer interface */
|
||||
|
||||
func getProcAddr(lib windows.Handle, name string) uintptr {
|
||||
addr, err := windows.GetProcAddress(lib, name)
|
||||
if err != nil {
|
||||
panic(name + " " + err.Error())
|
||||
}
|
||||
return addr
|
||||
}
|
||||
|
||||
func resetEvent(h windows.Handle) error {
|
||||
r, _, err := syscall.Syscall(nResetEvent, 1, uintptr(h), 0, 0)
|
||||
if r == 0 {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func getOverlappedResult(h windows.Handle, overlapped *windows.Overlapped) (int, error) {
|
||||
var n int
|
||||
r, _, err := syscall.Syscall6(
|
||||
nGetOverlappedResult,
|
||||
4,
|
||||
uintptr(h),
|
||||
uintptr(unsafe.Pointer(overlapped)),
|
||||
uintptr(unsafe.Pointer(&n)), 1, 0, 0)
|
||||
|
||||
if r == 0 {
|
||||
return n, err
|
||||
}
|
||||
return n, nil
|
||||
}
|
||||
|
||||
func newOverlapped() (*windows.Overlapped, error) {
|
||||
var overlapped windows.Overlapped
|
||||
r, _, err := syscall.Syscall6(nCreateEvent, 4, 0, 1, 0, 0, 0, 0)
|
||||
if r == 0 {
|
||||
return nil, err
|
||||
}
|
||||
overlapped.HEvent = windows.Handle(r)
|
||||
return &overlapped, nil
|
||||
}
|
||||
|
||||
func (f *NativeTUN) Events() chan TUNEvent {
|
||||
return f.events
|
||||
}
|
||||
|
||||
func (f *NativeTUN) Close() error {
|
||||
return windows.Close(f.fd)
|
||||
}
|
||||
|
||||
func (f *NativeTUN) Write(b []byte) (int, error) {
|
||||
f.wl.Lock()
|
||||
defer f.wl.Unlock()
|
||||
|
||||
if err := resetEvent(f.wo.HEvent); err != nil {
|
||||
return 0, err
|
||||
}
|
||||
var n uint32
|
||||
err := windows.WriteFile(f.fd, b, &n, f.wo)
|
||||
if err != nil && err != windows.ERROR_IO_PENDING {
|
||||
return int(n), err
|
||||
}
|
||||
return getOverlappedResult(f.fd, f.wo)
|
||||
}
|
||||
|
||||
func (f *NativeTUN) Read(b []byte) (int, error) {
|
||||
f.rl.Lock()
|
||||
defer f.rl.Unlock()
|
||||
|
||||
if err := resetEvent(f.ro.HEvent); err != nil {
|
||||
return 0, err
|
||||
}
|
||||
var done uint32
|
||||
err := windows.ReadFile(f.fd, b, &done, f.ro)
|
||||
if err != nil && err != windows.ERROR_IO_PENDING {
|
||||
return int(done), err
|
||||
}
|
||||
return getOverlappedResult(f.fd, f.ro)
|
||||
}
|
||||
|
||||
func getdeviceid(
|
||||
targetComponentId string,
|
||||
targetDeviceName string,
|
||||
) (deviceid string, err error) {
|
||||
|
||||
getName := func(instanceId string) (string, error) {
|
||||
path := fmt.Sprintf(
|
||||
`SYSTEM\CurrentControlSet\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318}\%s\Connection`,
|
||||
instanceId,
|
||||
)
|
||||
|
||||
key, err := registry.OpenKey(
|
||||
registry.LOCAL_MACHINE,
|
||||
path,
|
||||
registry.READ,
|
||||
)
|
||||
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
defer key.Close()
|
||||
|
||||
val, _, err := key.GetStringValue("Name")
|
||||
key.Close()
|
||||
return val, err
|
||||
}
|
||||
|
||||
getInstanceId := func(keyName string) (string, string, error) {
|
||||
path := fmt.Sprintf(
|
||||
`SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}\%s`,
|
||||
keyName,
|
||||
)
|
||||
|
||||
key, err := registry.OpenKey(
|
||||
registry.LOCAL_MACHINE,
|
||||
path,
|
||||
registry.READ,
|
||||
)
|
||||
|
||||
if err != nil {
|
||||
return "", "", err
|
||||
}
|
||||
defer key.Close()
|
||||
|
||||
componentId, _, err := key.GetStringValue("ComponentId")
|
||||
if err != nil {
|
||||
return "", "", err
|
||||
}
|
||||
|
||||
instanceId, _, err := key.GetStringValue("NetCfgInstanceId")
|
||||
|
||||
return componentId, instanceId, err
|
||||
}
|
||||
|
||||
// find list of all network devices
|
||||
|
||||
k, err := registry.OpenKey(
|
||||
registry.LOCAL_MACHINE,
|
||||
`SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}`,
|
||||
registry.READ,
|
||||
)
|
||||
|
||||
if err != nil {
|
||||
return "", fmt.Errorf("Failed to open the adapter registry, TAP driver may be not installed, %v", err)
|
||||
}
|
||||
|
||||
defer k.Close()
|
||||
|
||||
keys, err := k.ReadSubKeyNames(-1)
|
||||
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
// look for matching component id and name
|
||||
|
||||
var componentFound bool
|
||||
|
||||
for _, v := range keys {
|
||||
|
||||
componentId, instanceId, err := getInstanceId(v)
|
||||
if err != nil || componentId != targetComponentId {
|
||||
continue
|
||||
}
|
||||
|
||||
componentFound = true
|
||||
|
||||
deviceName, err := getName(instanceId)
|
||||
if err != nil || deviceName != targetDeviceName {
|
||||
continue
|
||||
}
|
||||
|
||||
return instanceId, nil
|
||||
}
|
||||
|
||||
// provide a descriptive error message
|
||||
|
||||
if componentFound {
|
||||
return "", fmt.Errorf("Unable to find tun/tap device with name = %s", targetDeviceName)
|
||||
}
|
||||
|
||||
return "", fmt.Errorf(
|
||||
"Unable to find device in registry with ComponentId = %s, is tap-windows installed?",
|
||||
targetComponentId,
|
||||
)
|
||||
}
|
||||
|
||||
// setStatus is used to bring up or bring down the interface
|
||||
func setStatus(fd windows.Handle, status bool) error {
|
||||
var code [4]byte
|
||||
if status {
|
||||
binary.LittleEndian.PutUint32(code[:], 1)
|
||||
}
|
||||
|
||||
var bytesReturned uint32
|
||||
rdbbuf := make([]byte, windows.MAXIMUM_REPARSE_DATA_BUFFER_SIZE)
|
||||
return windows.DeviceIoControl(
|
||||
fd,
|
||||
TAP_IOCTL_SET_MEDIA_STATUS,
|
||||
&code[0],
|
||||
uint32(4),
|
||||
&rdbbuf[0],
|
||||
uint32(len(rdbbuf)),
|
||||
&bytesReturned,
|
||||
nil,
|
||||
)
|
||||
}
|
||||
|
||||
/* When operating in TUN mode we must assign an ip address & subnet to the device.
|
||||
*
|
||||
*/
|
||||
func setTUN(fd windows.Handle, network string) error {
|
||||
var bytesReturned uint32
|
||||
rdbbuf := make([]byte, windows.MAXIMUM_REPARSE_DATA_BUFFER_SIZE)
|
||||
localIP, remoteNet, err := net.ParseCIDR(network)
|
||||
|
||||
if err != nil {
|
||||
return fmt.Errorf("Failed to parse network CIDR in config, %v", err)
|
||||
}
|
||||
|
||||
if localIP.To4() == nil {
|
||||
return fmt.Errorf("Provided network(%s) is not a valid IPv4 address", network)
|
||||
}
|
||||
|
||||
var param [12]byte
|
||||
|
||||
copy(param[0:4], localIP.To4())
|
||||
copy(param[4:8], remoteNet.IP.To4())
|
||||
copy(param[8:12], remoteNet.Mask)
|
||||
|
||||
return windows.DeviceIoControl(
|
||||
fd,
|
||||
TAP_IOCTL_CONFIG_TUN,
|
||||
¶m[0],
|
||||
uint32(12),
|
||||
&rdbbuf[0],
|
||||
uint32(len(rdbbuf)),
|
||||
&bytesReturned,
|
||||
nil,
|
||||
)
|
||||
}
|
||||
|
||||
func (tun *NativeTUN) MTU() (int, error) {
|
||||
var mtu [4]byte
|
||||
var bytesReturned uint32
|
||||
err := windows.DeviceIoControl(
|
||||
tun.fd,
|
||||
TAP_IOCTL_GET_MTU,
|
||||
&mtu[0],
|
||||
uint32(len(mtu)),
|
||||
&mtu[0],
|
||||
uint32(len(mtu)),
|
||||
&bytesReturned,
|
||||
nil,
|
||||
)
|
||||
val := binary.LittleEndian.Uint32(mtu[:])
|
||||
return int(val), err
|
||||
}
|
||||
|
||||
func (tun *NativeTUN) Name() string {
|
||||
return tun.name
|
||||
}
|
||||
|
||||
func CreateTUN(name string) (TUNDevice, error) {
|
||||
|
||||
// find the device in registry.
|
||||
|
||||
deviceid, err := getdeviceid(ComponentID, name)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
path := "\\\\.\\Global\\" + deviceid + ".tap"
|
||||
pathp, err := windows.UTF16PtrFromString(path)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// create TUN device
|
||||
|
||||
handle, err := windows.CreateFile(
|
||||
pathp,
|
||||
windows.GENERIC_READ|windows.GENERIC_WRITE,
|
||||
0,
|
||||
nil,
|
||||
windows.OPEN_EXISTING,
|
||||
windows.FILE_ATTRIBUTE_SYSTEM|windows.FILE_FLAG_OVERLAPPED,
|
||||
0,
|
||||
)
|
||||
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
ro, err := newOverlapped()
|
||||
if err != nil {
|
||||
windows.Close(handle)
|
||||
return nil, err
|
||||
}
|
||||
|
||||
wo, err := newOverlapped()
|
||||
if err != nil {
|
||||
windows.Close(handle)
|
||||
return nil, err
|
||||
}
|
||||
|
||||
tun := &NativeTUN{
|
||||
fd: handle,
|
||||
name: name,
|
||||
ro: ro,
|
||||
wo: wo,
|
||||
events: make(chan TUNEvent, 5),
|
||||
}
|
||||
|
||||
// find addresses of interface
|
||||
// TODO: fix this hack, the question is how
|
||||
|
||||
inter, err := net.InterfaceByName(name)
|
||||
if err != nil {
|
||||
windows.Close(handle)
|
||||
return nil, err
|
||||
}
|
||||
|
||||
addrs, err := inter.Addrs()
|
||||
if err != nil {
|
||||
windows.Close(handle)
|
||||
return nil, err
|
||||
}
|
||||
|
||||
var ip net.IP
|
||||
for _, addr := range addrs {
|
||||
ip = func() net.IP {
|
||||
switch v := addr.(type) {
|
||||
case *net.IPNet:
|
||||
return v.IP.To4()
|
||||
case *net.IPAddr:
|
||||
return v.IP.To4()
|
||||
}
|
||||
return nil
|
||||
}()
|
||||
if ip != nil {
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
if ip == nil {
|
||||
windows.Close(handle)
|
||||
return nil, errors.New("No IPv4 address found for interface")
|
||||
}
|
||||
|
||||
// bring up device.
|
||||
|
||||
if err := setStatus(handle, true); err != nil {
|
||||
windows.Close(handle)
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// set tun mode
|
||||
|
||||
mask := ip.String() + "/0"
|
||||
if err := setTUN(handle, mask); err != nil {
|
||||
windows.Close(handle)
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// start listener
|
||||
|
||||
go func(native *NativeTUN, ifname string) {
|
||||
// TODO: Fix this very niave implementation
|
||||
var (
|
||||
statusUp bool
|
||||
statusMTU int
|
||||
)
|
||||
|
||||
for ; ; time.Sleep(time.Second) {
|
||||
intr, err := net.InterfaceByName(name)
|
||||
if err != nil {
|
||||
// TODO: handle
|
||||
return
|
||||
}
|
||||
|
||||
// Up / Down event
|
||||
up := (intr.Flags & net.FlagUp) != 0
|
||||
if up != statusUp && up {
|
||||
native.events <- TUNEventUp
|
||||
}
|
||||
if up != statusUp && !up {
|
||||
native.events <- TUNEventDown
|
||||
}
|
||||
statusUp = up
|
||||
|
||||
// MTU changes
|
||||
if intr.MTU != statusMTU {
|
||||
native.events <- TUNEventMTUUpdate
|
||||
}
|
||||
statusMTU = intr.MTU
|
||||
}
|
||||
}(tun, name)
|
||||
|
||||
return tun, nil
|
||||
}
|
||||
44
src/uapi_windows.go
Normal file
44
src/uapi_windows.go
Normal file
@ -0,0 +1,44 @@
|
||||
package main
|
||||
|
||||
/* UAPI on windows uses a bidirectional named pipe
|
||||
*/
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"github.com/Microsoft/go-winio"
|
||||
"golang.org/x/sys/windows"
|
||||
"net"
|
||||
)
|
||||
|
||||
const (
|
||||
ipcErrorIO = -int64(windows.ERROR_BROKEN_PIPE)
|
||||
ipcErrorNotDefined = -int64(windows.ERROR_SERVICE_SPECIFIC_ERROR)
|
||||
ipcErrorProtocol = -int64(windows.ERROR_SERVICE_SPECIFIC_ERROR)
|
||||
ipcErrorInvalid = -int64(windows.ERROR_SERVICE_SPECIFIC_ERROR)
|
||||
)
|
||||
|
||||
const PipeNameFmt = "\\\\.\\pipe\\wireguard-ipc-%s"
|
||||
|
||||
type UAPIListener struct {
|
||||
listener net.Listener
|
||||
}
|
||||
|
||||
func (uapi *UAPIListener) Accept() (net.Conn, error) {
|
||||
return nil, nil
|
||||
}
|
||||
|
||||
func (uapi *UAPIListener) Close() error {
|
||||
return uapi.listener.Close()
|
||||
}
|
||||
|
||||
func (uapi *UAPIListener) Addr() net.Addr {
|
||||
return nil
|
||||
}
|
||||
|
||||
func NewUAPIListener(name string) (net.Listener, error) {
|
||||
path := fmt.Sprintf(PipeNameFmt, name)
|
||||
return winio.ListenPipe(path, &winio.PipeConfig{
|
||||
InputBufferSize: 2048,
|
||||
OutputBufferSize: 2048,
|
||||
})
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user