fix: The tcp zero window was never sent when it full of small packets #273
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Signed-off-by: Jovi Hsu <jv.hsu@outlook.com>
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When so->so_rcv is filled with small packets, the actual space is much smaller than (tp->rcv_adv - tp->rcv_nxt)), which makes the tcp-zero-window never have a chance to be sent.
Signed-off-by: Jovi Hsu jv.hsu@outlook.com