snow/wireguard-go
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timers: clear send_keepalive timer on sending handshake response

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We reorganize this into also doing so on sending keepalives itself,
which means the state machine is much more consistent, even if this was
already implied.

Kernel module commit 30290ef1d2581a3e6ee8ffcdb05d580cfba976be
This commit is contained in:
Jason A. Donenfeld 2018-05-19 01:19:53 +02:00
parent 2a432523ed
commit 870734ab5e
2 changed files with 14 additions and 10 deletions
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8
send.go
View file

@ -157,6 +157,7 @@ func (peer *Peer) SendHandshakeInitiation(isRetry bool) error {
peer.cookieGenerator.AddMacs(packet)
peer.timersAnyAuthenticatedPacketTraversal()
peer.timersAnyAuthenticatedPacketSent()
err = peer.SendBuffer(packet)
if err != nil {
@ -194,6 +195,7 @@ func (peer *Peer) SendHandshakeResponse() error {
peer.timersSessionDerived()
peer.timersAnyAuthenticatedPacketTraversal()
peer.timersAnyAuthenticatedPacketSent()
err = peer.SendBuffer(packet)
if err != nil {
@ -544,6 +546,9 @@ func (peer *Peer) RoutineSequentialSender() {
continue
}
peer.timersAnyAuthenticatedPacketTraversal()
peer.timersAnyAuthenticatedPacketSent()
// send message and return buffer to pool
length := uint64(len(elem.packet))
@ -555,9 +560,6 @@ func (peer *Peer) RoutineSequentialSender() {
}
atomic.AddUint64(&peer.stats.txBytes, length)
// update timers
peer.timersAnyAuthenticatedPacketTraversal()
if len(elem.packet) != MessageKeepaliveSize {
peer.timersDataSent()
}

16
timers.go
View file

@ -143,10 +143,6 @@ func expiredPersistentKeepalive(peer *Peer) {
/* Should be called after an authenticated data packet is sent. */
func (peer *Peer) timersDataSent() {
if peer.timersActive() {
peer.timers.sendKeepalive.Del()
}
if peer.timersActive() && !peer.timers.newHandshake.isPending {
peer.timers.newHandshake.Mod(KeepaliveTimeout + RekeyTimeout)
}
@ -163,7 +159,14 @@ func (peer *Peer) timersDataReceived() {
}
}
/* Should be called after any type of authenticated packet is received -- keepalive or data. */
/* Should be called after any type of authenticated packet is sent -- keepalive, data, or handshake. */
func (peer *Peer) timersAnyAuthenticatedPacketSent() {
if peer.timersActive() {
peer.timers.sendKeepalive.Del()
}
}
/* Should be called after any type of authenticated packet is received -- keepalive, data, or handshake. */
func (peer *Peer) timersAnyAuthenticatedPacketReceived() {
if peer.timersActive() {
peer.timers.newHandshake.Del()
@ -173,7 +176,6 @@ func (peer *Peer) timersAnyAuthenticatedPacketReceived() {
/* Should be called after a handshake initiation message is sent. */
func (peer *Peer) timersHandshakeInitiated() {
if peer.timersActive() {
peer.timers.sendKeepalive.Del()
peer.timers.retransmitHandshake.Mod(RekeyTimeout + time.Millisecond*time.Duration(rand.Int31n(RekeyTimeoutJitterMaxMs)))
}
}
@ -195,7 +197,7 @@ func (peer *Peer) timersSessionDerived() {
}
}
/* Should be called before a packet with authentication -- data, keepalive, either handshake -- is sent, or after one is received. */
/* Should be called before a packet with authentication -- keepalive, data, or handshake -- is sent, or after one is received. */
func (peer *Peer) timersAnyAuthenticatedPacketTraversal() {
if peer.persistentKeepaliveInterval > 0 && peer.timersActive() {
peer.timers.persistentKeepalive.Mod(time.Duration(peer.persistentKeepaliveInterval) * time.Second)