Re: [lwip-users] (no subject)

[Anirudha Sarangi]

Hi,

I am new to lwip. Just took over from someone who has left my organization. Could you tell me exactly which timer functions in lwIP? If I know it I can cross-check if they are getting called at regular intervals or not.

 

As I said my lwIP application does not have any OS. I have used a timer to call "tcp_fasttmr" and "tcp_slowtmr" at regular intervals. 

Are you referring to these functions?

And if so, what is the interval at which "tcp_fasttmr" should be called and what interval "tcp_slowtmr" should be called?

 

regards

Anirudha 

---

From: Kieran Mansley <address@hidden>
To: Mailing list for lwIP users <address@hidden>
Sent: Thursday, 7 July 2011 14:07:11
Subject: Re: [lwip-users] (no subject)

On Wed, 2011-07-06 at 18:40 +0800, Anirudha Sarangi wrote:
> 
> If I run wireshark on the PC where jperf runs, the capture indicates
> an "TCP out
> of order" message. Probably, the PC asks for a re-transfer but the
> board does
> not respond.

Are you calling the timers correctly?  If you weren't calling lwIP's
timer functions at the correct intervals, one side effect would be that
TCP retransmissions would be broken, which seems to match what you're
describing.

Kieran


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