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Re: [lwip-users] lwip 1.3 UDP - DNS strange behaviour
From: |
Rejean Groleau |
Subject: |
Re: [lwip-users] lwip 1.3 UDP - DNS strange behaviour |
Date: |
Mon, 19 Jan 2009 09:22:24 -0800 (PST) |
Hi Sergio,
I had the same problem a while back. My problem was two-fold:
First, I did not have enough pbufs (PBUF_POOL_SIZE and MEMP_NUM_PBUF)
to do everything I was doing at startup. Once I got the LWIP_DEBUGF
and LWIP_PLATFORM_DIAG macros properly implemented, I was able to see
the errors coming from the dns_send() function.
Then, I was not waiting for the interface to be up and initialized before
calling dns_gethostbyname(). This was solved by calling netif_is_up().
Tell me if this was any help at all,
-Reggie.
Sergio Sider wrote:
>
> The call to dns_gethostbyname returns
> with ERR_INPROGRESS as expected, but the query packets are not sent and
> the
> callback function is never called, even after the timeouts... (everything
> else works, I can ping the interface, webserver is working, and so on). I
> noticed it only occurs if I call dns_gethostbyname right after
> initializing
> lwip (using fixed IP). If I use DHCP or I wait a few seconds after I set
> the
> static IP, it works sometimes.
>
--
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Sent from the lwip-users mailing list archive at Nabble.com.
- [lwip-users] lwip 1.3 UDP - DNS strange behaviour, Sergio Sider, 2009/01/19
- Re: [lwip-users] lwip 1.3 UDP - DNS strange behaviour,
Rejean Groleau <=
- Re: [lwip-users] lwip 1.3 UDP - DNS strange behaviour, Jonathan Larmour, 2009/01/19
- Re: [lwip-users] lwip 1.3 UDP - DNS strange behaviour, Sergio Sider, 2009/01/19
- Re: [lwip-users] lwip 1.3 UDP - DNS strange behaviour, Sergio Sider, 2009/01/20
- Re: [lwip-users] lwip 1.3 UDP - DNS strange behaviour, Jonathan Larmour, 2009/01/20
- Re: [lwip-users] lwip 1.3 UDP - DNS strange behaviour, Sergio Sider, 2009/01/20
- Re: [lwip-users] lwip 1.3 UDP - DNS strange behaviour, address@hidden, 2009/01/20
- Re: [lwip-users] lwip 1.3 UDP - DNS strange behaviour, Jonathan Larmour, 2009/01/20
- Re: [lwip-users] lwip 1.3 UDP - DNS strange behaviour, Rejean Groleau, 2009/01/20
- Re: [lwip-users] lwip 1.3 UDP - DNS strange behaviour, Sergio Sider, 2009/01/20
- Re: [lwip-users] lwip 1.3 UDP - DNS strange behaviour, address@hidden, 2009/01/20