Re: [lwip-users] Problem accessing "httpd" web server from a Linux PC

[Info]

I don't believe this is a problem. According to the lwIP documentation
it should be no problem to use the RAW API functions as long as you call
all RAW API function from inside the main tcpip_thread... and that is
the case in the "httpd" web server code I use (as far as I could see).

Regards, Roland

Am 03.12.2015 um 17:26 schrieb Bettega Stefano:
> If I well remember the httpd examples uses RAW APIs (it's in httpserver_raw 
> folder) and it's intended to be used when NO_SYS=1, as it accesses directly 
> the internals structures of lwIP. As you are using FreeRTOS, you may have 
> unpredictable results. I had the same problem and had to switch to 
> httpserver, which uses netconn APIs.
>
> Cheers,
> Stefano
>
> -----Messaggio originale-----
> Da: address@hidden [mailto:address@hidden Per conto di Info
> Inviato: giovedì 3 dicembre 2015 14:34
> A: address@hidden
> Oggetto: [lwip-users] Problem accessing "httpd" web server from a Linux PC
>
> Hi
>
> I'm using the "httpd" (httpd.c) web server from the lwIP contribution
> package (1.4.1) on top of the lwIP 1.4.1 on an embedded system (using
> the FreeRTOS). If I access the web server from a Windows PC with the
> FireFox browser there is no problem and the pages are all shown like
> expected. If I now use the same configuration and trying to access the
> web server from a Linux PC (also with the FireFox browser) the pages are
> not shown, because there are problems with the communication between the
> PC and the lwIP.
> The PCs are connected directly (point-to-point) to the embedded system
> (means there is no switch, etc. between).
>
> I have activated all the error checking inside the lwIP source code and
> also enabled the statistic counters... but it does not show me any
> problem. There are no error messages (and no stop trough the build-in
> asserts) and the statistic counters look all good, even if a try to
> access the web server with the Linux PC.
>
> I have attached two Wireshark recordings, one done while connected with
> the Windows PC and the other while connected with the Linux PC. If
> somebody with more knowledge could have a look into the recordings and
> maybe give me some hints what the problem could be.
>
> Any help would be very welcome
>
> Regards, Roland
>
>
>
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