Re: [lwip-users] lwIP 1.3.0 PPP, DNS, multithreaded OS issues

[Jonathan Larmour]

Dustin Stahlback wrote:
> I use lwIP with a multithreaded OS.  The threading is as follows:
> 
> PPP thread
> TCPIP thread with DNS enabled
> APPLICATION thread
> 
> 
> When I enable the DNS functionality, the PPP client will never make a
> connection (callback is never called within the PPP thread).
> However, when DNS is disabled, the PPP client runs and operates
> correctly.  Is there any fundamental reason why this would fail such as
> incorrect thread handling.  The only call I see the PPP client make is
> tcpip_callback().

Obviously it could be a bug. Or perhaps you're running out of TCPIP thread
messages. Try enabling the lwIP statistics (LWIP_STATS) and have a look at
the statistics to see if there were any allocation errors.

Jifl
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