Re: [lwip-users] Question regarding keep alive and more

[Chen]

> On Thu, 2012-07-12
> at 14:03 -0400, Chen wrote:
> > 
> > At 200kb/s and full-size packet, lwip_send will failed once a
> while
>
> What error does it return?

I will try to catch them ...


> > At this point,
> how can I tell if the failure is from broken line 
> > (keep alive failed) or out of tx buffer?
>
> Hopefully the error code you get will reveal the
> problem.

what is the error code for keepalive?


> >  if it is
> out of tx buffer, 
> > anyway to get the warning first so that I can send out a
> smaller
> > packet first? 
>
> There isn't an API to find out how many packet buffers are currently
> available in lwIP.  You can find out how much space there is in the
> send
> buffer for the socket, but if there isn't a packet buffer available
> that
> doesn't help much.

Do you suggest I should just send it via lwip_send 
and check the return value to figure out how many data got sent
out and adjust accordingly?


> Kieran