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RE: [lwip-users] TCP not sending initial ACK
From: |
Chuck Kuecker |
Subject: |
RE: [lwip-users] TCP not sending initial ACK |
Date: |
Wed, 26 Aug 2009 10:54:42 -0500 |
No, the LWIP timers are called from the main timer tick, and there are
no other threads. This is how LWIP is set up for the Luminary driver
library I am using, and it has always worked before.
Wireshark shows no defective packets.
Chuck
-----Original Message-----
From: address@hidden
[mailto:address@hidden On
Behalf Of address@hidden
Sent: Wednesday, August 26, 2009 10:34 AM
To: Mailing list for lwIP users
Subject: Re: [lwip-users] TCP not sending initial ACK
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.
Simon
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- [lwip-users] TCP not sending initial ACK, Chuck Kuecker, 2009/08/26
- Re: [lwip-users] TCP not sending initial ACK, address@hidden, 2009/08/26
- RE: [lwip-users] TCP not sending initial ACK,
Chuck Kuecker <=
- Re: [lwip-users] TCP not sending initial ACK, address@hidden, 2009/08/26
- RE: [lwip-users] TCP not sending initial ACK, JM, 2009/08/26
- RE: [lwip-users] TCP not sending initial ACK, Chuck Kuecker, 2009/08/26
- RE: [lwip-users] TCP not sending initial ACK, Chuck Kuecker, 2009/08/26
- Re: [lwip-users] TCP not sending initial ACK, address@hidden, 2009/08/26
- RE: [lwip-users] TCP not sending initial ACK, JM, 2009/08/27
- RE: [lwip-users] TCP not sending initial ACK, Chuck Kuecker, 2009/08/27
- RE: [lwip-users] TCP not sending initial ACK, Chuck Kuecker, 2009/08/27
- RE: [lwip-users] TCP not sending initial ACK, JM, 2009/08/27
- RE: [lwip-users] TCP not sending initial ACK, Chuck Kuecker, 2009/08/27