diff options
| author | Avery Pennarun <apenwarr@tailscale.com> | 2019-10-15 22:39:44 -0400 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2020-05-02 01:50:47 -0600 |
| commit | d60857e1a7d82735c01f893f644455fc7ccc423f (patch) | |
| tree | 7a92d072594af24494b4a1297e93c1ec01e79fb4 | |
| parent | 2fb0a712f0ca2f9a922cdc4f1f47b88c3ee70048 (diff) | |
device: add debug logs describing handshake rejection
Useful in testing when bad network stacks repeat or
batch large numbers of packets.
Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
| -rw-r--r-- | device/noise-protocol.go | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/device/noise-protocol.go b/device/noise-protocol.go index 6dcc831..a848c47 100644 --- a/device/noise-protocol.go +++ b/device/noise-protocol.go @@ -314,11 +314,15 @@ func (device *Device) ConsumeMessageInitiation(msg *MessageInitiation) *Peer { // protect against replay & flood - var ok bool - ok = timestamp.After(handshake.lastTimestamp) - ok = ok && time.Since(handshake.lastInitiationConsumption) > HandshakeInitationRate + replay := !timestamp.After(handshake.lastTimestamp) + flood := time.Since(handshake.lastInitiationConsumption) <= HandshakeInitationRate handshake.mutex.RUnlock() - if !ok { + if replay { + device.log.Debug.Printf("%v - ConsumeMessageInitiation: handshake replay @ %v\n", peer, timestamp) + return nil + } + if flood { + device.log.Debug.Printf("%v - ConsumeMessageInitiation: handshake flood\n", peer) return nil } |