Re: [lwip-users] Strange packet sizes in receive-callback

[Satz Klauer]

OK, it seems to be a chain. Since I only checked the tot_len field and
used this for copying the data I of course got some crap because I
tried to pull all data out of the first pbuf payload. Thanks for the
hint!


On Fri, Jan 3, 2014 at 10:57 PM, Bill Auerbach
<address@hidden> wrote:
> Hi,
>
> Could be a packet chain (pbuf chain) of 8 packets.  The "some crap" part is
> not good and probably means the driver needs some scrutiny for times when
> it's being pushed.
>
> Bill
>
> -----Original Message-----
> From: address@hidden
> [mailto:address@hidden On Behalf
> Of Satz Klauer
> Sent: Friday, January 03, 2014 3:44 PM
> To: Mailing list for lwIP users
> Subject: [lwip-users] Strange packet sizes in receive-callback
>
> Hi,
>
> I'm new to lwIP, so hopefully my question is not too stupid.
>
> I'm sending huge amounts of data to my BeagleBone Black where a lwIP
> implementation is running. Due to that within my receive callback I get
> repeatedly packets with a size of 1460 bytes (which should be some TCP
> segment/framesize?).
>
> This works mainly well...but sometimes a packet with a bigger size is
> received (e.g. 11680 bytes). This is bigger than the maximum possible size
> and the memory contains some crap.
>
> Any idea what the reason could be for this behaviour?
>
> Thanks!
>
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