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ACKs come with the source and destination address empty, this has been clarified already. But there is something else: if the destination address is empty but the source address is valid, it may be a way to reach the PAN coordinator. Either the device receiving this frame is the PAN coordinator itself and should process what it just received (PACKET_HOST) or it is not and may, if supported, relay the packet as it is targeted to another device in the network. Right now we do not support relaying so the packet should be dropped in the first place, but the stamping looks more accurate this way. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Acked-by: Stefan Schmidt <stefan@datenfreihafen.org> Acked-by: Alexander Aring <aahringo@redhat.com> Link: https://lore.kernel.org/linux-wpan/20231128111655.507479-3-miquel.raynal@bootlin.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.