From: Priyaranjan Jha
Date: Fri, 3 Nov 2017 17:46:55 -0700
> Fixes DSACK-based undo when sender is in Open State and
> an ACK advances snd_una.
>
> Example scenario:
> - Sender goes into recovery and makes some spurious rtx.
> - It comes out of recovery and enters into open state.
> - It sends
Fixes DSACK-based undo when sender is in Open State and
an ACK advances snd_una.
Example scenario:
- Sender goes into recovery and makes some spurious rtx.
- It comes out of recovery and enters into open state.
- It sends some more packets, let's say 4.
- The receiver sends an ACK for the first tw
