RE: [lwip-users] callback function args in lwip 1.3

[Hans Jacob Moller]

Looked throug my code one more time at discovered that it was the wrong
instance data i passed tcp_arg. Now it works like a charm.

Thanks Kieran for the quick response.

/Hans

-----Original Message-----
From: address@hidden
[mailto:address@hidden On
Behalf Of Kieran Mansley
Sent: 18. februar 2008 15:01
To: Mailing list for lwIP users
Subject: Re: [lwip-users] callback function args in lwip 1.3

On Mon, 2008-02-18 at 13:55 +0000, Hans Jacob Moller wrote:
> Allocate inst pointer and fill ind some values.
> 
> .
> 
> newpcb = tcp_listen(oldpcb);
> 
> tcp_arg(newpcb,inst);
> 
> tcp_accept(newpcb, acceptConnect);
>
> err_t acceptConnect(void *arg, struct tcp_pcb *newpcb, err_t err)
> 
> arg seems to be NULL when it is called from the lwip stack....

Can you check what the values of newpcb are at each stage?  e.g. Does
the newpcb argument supplied when acceptConnect() is called match the
newpcb you gave to tcp_arg() and tcp_accept()?

Kieran 



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