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Re: [lwip-users] TCP not sending initial ACK

From: address@hidden
Subject: Re: [lwip-users] TCP not sending initial ACK
Date: Wed, 26 Aug 2009 17:34:11 +0200
User-agent: Thunderbird (Macintosh/20090812)

Chuck Kuecker wrote:

I’ve tried changing the frequency of LWIP interrupt handler calls, both greatly slowing and speeding them up, with no apparent change in behavior.

What exactly do you mean with "interrupt handler calls"? The timers? They should *not* be called from an interrupt level: the core code of lwIP may only be accessed from one context at a time!

If you obeyed this rule and still have problems, have a look at wireshark packet traces and see if it reports errors in a packet. Also, have a look at the stats (turn them on in lwipopts.h if not already done) and find out whether there are packets dropped.


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