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Re: [lwip-users] Re: Problem receiving large packets

From: Christiaan Simons
Subject: Re: [lwip-users] Re: Problem receiving large packets
Date: Wed, 8 Feb 2006 08:59:22 +0100

address@hidden wrote on 07-02-2006

> Christiaan, PBUF_POOL_BUFSIZE is equal to 1500 in my lwipopts.h.

That is clearly not your problem then.

> I think i expressed my problem wrong, actually, when sendding a packet
> larger than 600bytes, the fpga receives it fully, but the one character
> it's supposed to send back after each receive seems to be "ignored" or
> not seen at all by the pc. So the script on my pc is waiting forever for
> that char to arrive.

Ah, are you sure your lwip server actually outputs the packet on the
network. Can you observe it with a sniffer program?

If not you can try to set the LWIP_DEBUG predefine in your Makefile,
and select the debugging options in lwipopts.h. Then you can see
where things might get lost in your stack.

Maybe some IP configuration is incomplete.

Christiaan Simons

Hardware / Software Engineer
Axon Digital Design


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