diff options
| -rw-r--r-- | send.go | 12 |
1 files changed, 7 insertions, 5 deletions
@@ -488,11 +488,13 @@ func (device *Device) RoutineEncryption() { // pad content to multiple of 16 mtu := int(atomic.LoadInt32(&device.tun.mtu)) - rem := len(elem.packet) % PaddingMultiple - if rem > 0 { - for i := 0; i < PaddingMultiple-rem && len(elem.packet) < mtu; i++ { - elem.packet = append(elem.packet, 0) - } + lastUnit := len(elem.packet) % mtu + paddedSize := (lastUnit + PaddingMultiple - 1) & ^(PaddingMultiple - 1) + if paddedSize > mtu { + paddedSize = mtu + } + for i := len(elem.packet); i < paddedSize; i++ { + elem.packet = append(elem.packet, 0) } // encrypt content and release to consumer |