Re: [lwip-users] IP packet dropped due to bad version number 15

[Iwan Budi Kusnanto]

On 10/22/09, Kieran Mansley <address@hidden> wrote:
> On Thu, 2009-10-22 at 14:35 +0700, Iwan Budi Kusnanto wrote:
>  > Hi, i try to port lwip. I run the OS in qemu, and set lwip IP to 
> 192.168.0.1
>  > When i ping 192.168.0.1, i continuously get the following error, below.
>  > Note : the qemu & tap0 setting was fine. Previous lwip port can be
>  > ping-ed with this setting.
>  > I also copy-paste my 'tcpdump -i tap0'.
>  > Any idea ?
>  >
>  > ** error from lwip **
>  > IP packet dropped due to bad version number 15
>  > IP header:
>  > +-------------------------------+
>  > |15 |15 |  0xff |     65535     | (v, hl, tos, len)
>  > +-------------------------------+
>  > |    65535      |000|      23   | (id, flags, offset)
>  > +-------------------------------+
>  > |  242  |  244  |    0xad11     | (ttl, proto, chksum)
>  > +-------------------------------+
>  > |    8  |    6  |    0  |    1  | (src)
>  > +-------------------------------+
>  > |    8  |    0  |    6  |    4  | (dest)
>  > +-------------------------------+
>
>
> As you can see, lwIP has been passed an IP packet that is completely
>  corrupted.  The values in the header make me think that this is not an
>  IP packet at all.

Thx kieran, because tcpdump give normal output,  the other suspect is
the driver. But, the driver work fine in old version of lwip port.
Anyway, i will re-check the driver

>
>  Kieran
>
>
-- 
Iwan Budi Kusnanto