[mc1322x] [Contiki-developers] Broadcast PAN on Router solicitation

[David Kopf]

Looking at those pcaps, the 13224 has an extra bit set in the frame control 
field, 0xc841 vs. 0xc801 for the Raven.
Not sure what that bit means, but the raven has ffff ffff cdab in the header 
while the 13224 just has ffff ffff, no src PAN field.
In the Raven I think all that is automatically handled by the radio chip.

----- Original Message ----- 
From: "Jon Smirl" <jonsmirl at gmail.com>
To: "Contiki developer mailing list" 
<contiki-developers at lists.sourceforge.net>; "mc1322x" <mc1322x at devl.org>
Sent: Tuesday, November 17, 2009 5:14 PM
Subject: [Contiki-developers] Broadcast PAN on Router solicitation


> My Raven LCD sends a RS (router solicitation) with destination PAN
> 0xFFFF and source PAN 0xABCD.
> The 6lowpan data field is 30 byt
> In attached raven pcap packet 12.
> Same packet in expanded for is in packet 4.
> This RS works.
>
> In my port to the mc13224 I can't get the RS packet right.
> The equivalent undecoded packet is 4.
> Source and destination PAN are both 0xABCD
> The 6lowpan data field is 32 bytes.
> The extra two bytes in the data field appear to be there because of
> the missing destination PAN.
> In the decoded packet (11) this two byte difference causes the unknown
> option to be added.
>
> I can't figure out where in the code the destination PAN gets set to
> 0xFFFF before association.  The bug is probably cause by some
> structure needing a __packed__ attribute on ARM7. But I haven't been
> able to locate where in the code the 0xFFFF is set.
>
> -- 
> Jon Smirl
> jonsmirl at gmail.com
>


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