[lwip-users] Re: [lwip] Date: Tue, 5 Mar 2002 14:40:55 +0500

[Kieran Mansley]

On Tue, 5 Mar 2002, Mumtaz Ahmad wrote:

> Hi
> well the flags u mentioned are not in code ..i donot know at what code your
> are looking at (sorry if it sounds rude) and my question is still there .If
> the TF_ACK_NEXT flag is never set then how come delayed acks are
> transmitted?

Ahh, I think I see where the misunderstanding is.  The ACK code was
changed in 0.5.1, and TF_ACK_NEXT replaced with TF_ACK_NOW and
TF_ACK_DELAY - you might like to upgrade.  However, the TF_ACK_NEXT
flag is changed in the same place as its replacements (ie. tcp.h, using
the macros tcp_ack and tcp_ack_now)

There was a thread about tcp_ack and tcp_ack_now that should explain the
reasons for the change:

See
http://www.sics.se/~adam/lwip/maillist/msg00396.html
http://www.sics.se/~adam/lwip/maillist/msg00405.html
(and their follow-ups)

Cheers,

Kieran

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