Security handling with sequenced frames

[tobiasgraf]

The ZWave.Me Wall Controller Wall C-S sometimes sends its frames sequenced when holding down a button.
In ZWSecurity.cpp:350 there is a todo

        /* XXX TODO: Check the Sequence Header Frame to see if this is the first part of a
         * message, or 2nd part, or a entire message.
         *
         * I havn't actually seen a Z-Wave Message thats too big to fit in a encrypted message
         * yet, so we will look at this if such a message actually exists!
         */

describing exactly this behavior.
See the attached file for some logs.

sequenced_security_frame.txt

[Fishwaldo]

Thanks. As the comment says, I'd never seen this before. I'll look into it soon.

[aromanro]

I can confirm that there are devices that send sequenced security frames. One example is 'Senzor 4 in 1 Zipato (Philio)'.

[Fishwaldo]

Can you provide a log extract of the sequenced frames?

[aromanro]

I didn't use open zwave for noticing that, but code I wrote. I'm not sure I can provide a log from it, I signed an NDA and I'm not sure if that doesn't qualify as disclosure. Anyway, solving this wasn't hard at all.