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Re: [lwip-users] Submit response

From: Sanchayan
Subject: Re: [lwip-users] Submit response
Date: Tue, 17 Jul 2012 08:43:31 +0530
User-agent: Mozilla/5.0 (Windows NT 6.1; rv:13.0) Gecko/20120614 Thunderbird/13.0.1

Hello Sam,

Are you using the enet_io code examples available with Stellaris LM3S6965?

I think this should not be happening, though i can't be sure. The first thing that comes to my mind, is that the FindCGIParameter function iterates over a certain number of args, in this case max 16, and returns the index. According to the code comments, you can pass a maximum of 16 CGI parameters, which is defined in the httpd.h file.


On 17-07-2012 00:28, Kieran Mansley wrote:
On 16 Jul 2012, at 16:51, address@hidden wrote:

I am using lwip on a TI LM3S6965 without RTOS.

I have a web page with 12 checkboxes and a couple of select lists within a form
that is handled by a CGI handler in the program.

I know that a checkbox only sends data when it is checked.

If I check all 12 boxes and press the submit button the page immediately
shows an error. "unable to display page" and the CGI never gets called.

If I only check 10 or less boxes the CGI gets called and all is fine.

I have tried increasing MEMP_NUM_PBUF to 36 and increasing MEM_SIZE to 24K in 
the lwipopt.h file.
But it didn't help.  I suspect it has something to do with memory.

I agree it probably is memory, or perhaps with the increased number of 
check-boxes ticket the request size overflows some limit.  If you get a packet 
capture that might highlight some problem.

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