Re: lwip 1.3.1 testing

[Simon Kallweit <simon.kallweit@intefo.ch>]

John Dallaway wrote:
> Hi Simon
> 
> Simon Kallweit wrote:
> 
>> Testing on real hardware would be especially useful. Also testing on
>> big-endian targets might reveal some issues, as I've only been testing
>> on little-endian platforms.
> 
> Using your sources from lwip-20090827.tar.gz, I was able to build and
> run the httpd_simple test on a PowerPC (big-endian) target OK. DHCP over
> ethernet was also OK.

That's good to hear.

> The lwIP CDL script currently builds ecos/sio.c unconditionally so
> CYGPKG_IO_SERIAL is required even when both PPP and SLIP are disabled.
> It would be good to compile ecos/sio.c via a CDL option which is
> "calculated { CYGPKG_LWIP_PPP || CYGPKG_LWIP_SLIP }" if other source
> code will permit this.

sio.c is always compiled, but there is an #ifdef which includes the code 
only when either CYGPKG_LWIP_SLIP or CYGFUN_LWIP_PPPOS_SUPPORT is 
active. Also, CYGPKG_IO_SERIAL_DEVICES is only enabled if either SLIP or 
PPPoS support is enabled. Do you think solving that dependency in CDL is 
the better approach?

> Some other source code files which look like they might benefit from
> conditional compilation:
> 
>     ecos/ppp.c ecos/sequential.c ecos/simple.c netif/slipif.c

Same principles apply here.

> How is you own testing of lwIP 1.3.1 progressing?

Well, I'm currently using devices with lwIP 1.3.1 in field tests. They 
run in the 'simple' mode (single-threaded) and use PPP for GPRS 
connections via a GSM modem. I have not seen any issues with the current 
port. The devices run for days until they may be power-cycled for 
updates or maintenance.

Application development is done on the synthetic target, using a 
simulated GSM modem, simulating GPRS connections by spawning a local PPP 
server. No issues have occurred with this configuration either, although 
runtimes are usually only minutes to hours.

Simon