linux-toradex.git/net/ieee802154, branch v6.8-rc7

mac802154: Avoid new associations while disassociating

2023-12-15T10:14:57+00:00

While disassociating from a PAN ourselves, let's set the maximum number
of associations temporarily to zero to be sure no new device tries to
associate with us.

Signed-off-by: Miquel Raynal 
Acked-by: Stefan Schmidt 
Acked-by: Alexander Aring 
Link: https://lore.kernel.org/linux-wpan/20231128111655.507479-6-miquel.raynal@bootlin.com

ieee802154: Avoid confusing changes after associating

2023-12-15T10:14:55+00:00

Once associated with any device, we are part of a PAN (with a specific
PAN ID), and we are expected to be present on a particular
channel. Let's avoid confusing other devices by preventing any PAN
ID/channel change once associated.

Signed-off-by: Miquel Raynal 
Acked-by: Stefan Schmidt 
Acked-by: Alexander Aring 
Link: https://lore.kernel.org/linux-wpan/20231128111655.507479-5-miquel.raynal@bootlin.com

ieee802154: Give the user the association list

2023-11-20T10:43:45+00:00

Upon request, we must be able to provide to the user the list of
associations currently in place. Let's add a new netlink command and
attribute for this purpose.

Signed-off-by: Miquel Raynal 
Acked-by: Stefan Schmidt 
Acked-by: Alexander Aring 
Link: https://lore.kernel.org/linux-wpan/20230927181214.129346-12-miquel.raynal@bootlin.com

mac802154: Follow the number of associated devices

2023-11-20T10:43:19+00:00

Track the count of associated devices. Limit the number of associations
using the value provided by the user if any. If we reach the maximum
number of associations, we tell the device we are at capacity. If the
user do not want to accept any more associations, it may specify the
value 0 to the maximum number of associations, which will lead to an
access denied error status returned to the peers trying to associate.

Signed-off-by: Miquel Raynal 
Acked-by: Stefan Schmidt 
Acked-by: Alexander Aring 
Link: https://lore.kernel.org/linux-wpan/20230927181214.129346-10-miquel.raynal@bootlin.com

ieee802154: Add support for limiting the number of associated devices

2023-11-20T10:43:11+00:00

Coordinators may refuse associations. We need a user input for
that. Let's add a new netlink command which can provide a maximum number
of devices we accept to associate with as a first step. Later, we could
also forward the request to userspace and check whether the association
should be accepted or not.

Signed-off-by: Miquel Raynal 
Acked-by: Stefan Schmidt 
Acked-by: Alexander Aring 
Link: https://lore.kernel.org/linux-wpan/20230927181214.129346-9-miquel.raynal@bootlin.com

mac802154: Handle association requests from peers

2023-11-20T10:43:03+00:00

Coordinators may have to handle association requests from peers which
want to join the PAN. The logic involves:
- Acknowledging the request (done by hardware)
- If requested, a random short address that is free on this PAN should
  be chosen for the device.
- Sending an association response with the short address allocated for
  the peer and expecting it to be ack'ed.

If anything fails during this procedure, the peer is considered not
associated.

Signed-off-by: Miquel Raynal 
Acked-by: Stefan Schmidt 
Acked-by: Alexander Aring 
Link: https://lore.kernel.org/linux-wpan/20230927181214.129346-8-miquel.raynal@bootlin.com

mac802154: Handle disassociations

2023-11-20T10:42:55+00:00

Devices may decide to disassociate from their coordinator for different
reasons (device turning off, coordinator signal strength too low, etc),
the MAC layer just has to send a disassociation notification.

If the ack of the disassociation notification is not received, the
device may consider itself disassociated anyway.

Signed-off-by: Miquel Raynal 
Acked-by: Stefan Schmidt 
Acked-by: Alexander Aring 
Link: https://lore.kernel.org/linux-wpan/20230927181214.129346-7-miquel.raynal@bootlin.com

ieee802154: Add support for user disassociation requests

2023-11-20T10:42:47+00:00

A device may decide at some point to disassociate from a PAN, let's
introduce a netlink command for this purpose.

Signed-off-by: Miquel Raynal 
Acked-by: Stefan Schmidt 
Acked-by: Alexander Aring 
Link: https://lore.kernel.org/linux-wpan/20230927181214.129346-6-miquel.raynal@bootlin.com

mac802154: Handle associating

2023-11-20T10:42:39+00:00

Joining a PAN officially goes by associating with a coordinator. This
coordinator may have been discovered thanks to the beacons it sent in
the past. Add support to the MAC layer for these associations, which
require:
- Sending an association request
- Receiving an association response

The association response contains the association status, eventually a
reason if the association was unsuccessful, and finally a short address
that we should use for intra-PAN communication from now on, if we
required one (which is the default, and not yet configurable).

Signed-off-by: Miquel Raynal 
Acked-by: Stefan Schmidt 
Acked-by: Alexander Aring 
Link: https://lore.kernel.org/linux-wpan/20230927181214.129346-5-miquel.raynal@bootlin.com

ieee802154: Add support for user association requests

2023-11-20T10:42:24+00:00

Users may decide to associate with a peer, which becomes our parent
coordinator. Let's add the necessary netlink support for this.

Signed-off-by: Miquel Raynal 
Acked-by: Stefan Schmidt 
Acked-by: Alexander Aring 
Link: https://lore.kernel.org/linux-wpan/20230927181214.129346-4-miquel.raynal@bootlin.com