Messages in this thread | | | Date | Sat, 19 Mar 2022 11:04:43 +0100 | From | Florian Westphal <> | Subject | Re: [PATCH] net:ipv4: send an ack when seg.ack > snd.nxt |
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zhouzhouyi@gmail.com <zhouzhouyi@gmail.com> wrote: > - if (after(ack, tp->snd_nxt)) > + if (after(ack, tp->snd_nxt)) { > + tcp_send_ack(sk); > return -1; > + }
If we really need to do this we need to if (!(flag & FLAG_NO_CHALLENGE_ACK)) tcp_send_challenge_ack(sk);
... else this might result in two acks? Whats the problem thats being fixed here?
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