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| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2021-01-29 20:10:48 +0100 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2021-01-29 20:10:48 +0100 |
| commit | a9f80d8c587df99c6e8f57704aef3fe1ac62d0db (patch) | |
| tree | 2a42bbe99b26df0c54f3ef84ac369a0b246d7fed | |
| parent | de51129e33a5fe4fad3da172539e9be640d39211 (diff) | |
device: reduce number of append calls when padding
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
| -rw-r--r-- | device/send.go | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/device/send.go b/device/send.go index 5261c2f..9d63c4e 100644 --- a/device/send.go +++ b/device/send.go @@ -367,7 +367,7 @@ func calculatePaddingSize(packetSize, mtu int) int { * Obs. One instance per core */ func (device *Device) RoutineEncryption() { - + var paddingZeros [PaddingMultiple]byte var nonce [chacha20poly1305.NonceSize]byte defer device.log.Verbosef("Routine: encryption worker - stopped") @@ -386,11 +386,8 @@ func (device *Device) RoutineEncryption() { binary.LittleEndian.PutUint64(fieldNonce, elem.nonce) // pad content to multiple of 16 - paddingSize := calculatePaddingSize(len(elem.packet), int(atomic.LoadInt32(&device.tun.mtu))) - for i := 0; i < paddingSize; i++ { - elem.packet = append(elem.packet, 0) - } + elem.packet = append(elem.packet, paddingZeros[:paddingSize]...) // encrypt content and release to consumer |