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device: fix persistent_keepalive_interval data races

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Co-authored-by: David Anderson <danderson@tailscale.com>
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
This commit is contained in:
Josh Bleecher Snyder
2020-12-14 15:28:52 -08:00
committed by Jason A. Donenfeld
parent e1fa1cc556
commit 63066ce406
5 changed files with 22 additions and 9 deletions
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7
device/timers.go
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@@ -138,7 +138,7 @@ func expiredZeroKeyMaterial(peer *Peer) {
}
func expiredPersistentKeepalive(peer *Peer) {
if peer.persistentKeepaliveInterval > 0 {
if atomic.LoadUint32(&peer.persistentKeepaliveInterval) > 0 {
peer.SendKeepalive()
}
}
@@ -201,8 +201,9 @@ func (peer *Peer) timersSessionDerived() {
/* 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)
keepalive := atomic.LoadUint32(&peer.persistentKeepaliveInterval)
if keepalive > 0 && peer.timersActive() {
peer.timers.persistentKeepalive.Mod(time.Duration(keepalive) * time.Second)
}
}