Re: [lwip-users] netconn->acceptmbox is NULL

[Emil Ohlsson]

Ok, perhaps it would be simpler and work better to use raw API then...

Thanks for all the help :)

/Emil

-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Kieran Mansley
Sent: den 5 augusti 2011 16:03
To: Mailing list for lwIP users
Subject: Re: [lwip-users] netconn->acceptmbox is NULL

On Fri, 2011-08-05 at 15:10 +0200, Emil Ohlsson wrote:
> >On Fri, 2011-08-05 at 11:46 +0200, Emil Ohlsson wrote:
> >>    res = netconn_listen(cli);
> >>    if ( res != ERR_OK ) {/* Error handling */ }
> >
> >You should get an error here if it couldn't allocate the acceptmbox.  I 
> >would debug the do_listen() function in >src/api/api_msg.c to see if that 
> >allocation is failing, and if so why.
> >
> >Kieran
> 
> As far as I can see in do_listen it doesn't do anything to UDP 
> connections. Is it netconn_listen that allocates the acceptmbox?

I must confess I didn't notice you were using a UDP connection, and assumed 
that, because you were calling netconn_listen, it was TCP.  You don't need to 
call netconn_listen for a UDP connection.  But that won't solve your problem as 
there is still nothing setting acceptmbox to a valid state.  I think this must 
be a bug, as I can't see the lwIP socket API doing anything special for accept 
on a UDP socket, and I'd expect that to work.

Kieran


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