Fix #1522 - implement silly window sydrome protection on rx side

Before, each of small read()'s that raises window either from zero
or above threshold of aMSS, would generate an ACK. In a classic
silly-window-syndrome scenario, we can imagine a pessimistic case
when small read()'s generate a stream of ACKs.

This PR fixes that, essentially treating window size < aMSS as zero.
We send ACK exactly in a moment when window increases to >= aMSS
or half of receive buffer size (whichever smaller).

0 files changed, 0 insertions, 0 deletions