Hi Stefan, stefan@xxxxxxxxxxxxxxxxxx wrote on Wed, 20 Sep 2023 20:46:20 +0200: > Hello Miquel > > On 18.09.23 17:07, Miquel Raynal wrote: > > Hello, > > > > [I know we are in the middle of the merge window, I don't think it > > matters on the wpan side, so as the wpan subsystem did not evolve > > much since the previous merge window I figured I would not delay the > > sending of this series given the fact that I should have send it at the > > beginning of the summer...] > > > > Now that we can discover our peer coordinators or make ourselves > > dynamically discoverable, we may use the information about surrounding > > devices to create PANs dynamically. This involves of course: > > * Requesting an association to a coordinator, waiting for the response > > * Sending a disassociation notification to a coordinator > > * Receiving an association request when we are coordinator, answering > > the request (for now all devices are accepted up to a limit, to be > > refined) > > * Sending a disassociation notification to a child > > * Users may request the list of associated devices (the parent and the > > children). > > > > Here are a few example of userspace calls that can be made: > > iwpan dev <dev> associate pan_id 2 coord $COORD > > iwpan dev <dev> list_associations > > iwpan dev <dev> disassociate ext_addr $COORD > > > > I used a small using hwsim to scan for a coordinator, associate with > > it, look at the associations on both sides, disassociate from it and > > check the associations again: > > ./assoc-demo > > *** Scan *** > > PAN 0x0002 (on wpan1) > > coordinator 0x060f3b35169a498f > > page 0 > > channel 13 > > preamble code 0 > > mean prf 0 > > superframe spec. 0xcf11 > > LQI ff > > *** End of scan *** > > Associating wpan1 with coord0 0x060f3b35169a498f... > > Dumping coord0 assoc: > > child : 0x0b6f / 0xba7633ae47ccfb21 > > Dumping wpan1 assoc: > > parent: 0xffff / 0x060f3b35169a498f > > Disassociating from wpan1 > > Dumping coord0 assoc: > > Dumping wpan1 assoc: > > > > I could also successfully interact with a smaller device running Zephir, > > using its command line interface to associate and then disassociate from > > the Linux coordinator. > > > > Thanks! > > Miquèl > > > > Changes in v3: > > * Clarify a helper which compares if two devices seem to be identical by > > adding two comments. This is a static function that is only used by > > the PAN management core to operate or not an > > association/disassociation request. In this helper, a new check is > > introduced to be sure we compare fields which have been populated. > > * Dropped the "association_generation" counter and all its uses along > > the code. I tried to mimic some other counter but I agree it is not > > super useful and could be dropped anyway. > > * Dropped a faulty sequence number hardcoded to 10. This had no impact > > because a few lines later the same entry was set to a valid value. > > > > Changes in v2: > > * Drop the misleading IEEE802154_ADDR_LONG_BROADCAST definition and its > > only use which was useless anyway. > > * Clarified how devices are defined when the user requests to associate > > with a coordinator: for now only the extended address of the > > coordinator is relevant so this is the only address we care about. > > * Drop a useless NULL check before a kfree() call. > > * Add a check when allocating a child short address: it must be > > different than ours. > > * Rebased on top of v6.5. > > > > Miquel Raynal (11): > > ieee802154: Let PAN IDs be reset > > ieee802154: Internal PAN management > > ieee802154: Add support for user association requests > > mac802154: Handle associating > > ieee802154: Add support for user disassociation requests > > mac802154: Handle disassociations > > mac802154: Handle association requests from peers > > ieee802154: Add support for limiting the number of associated devices > > mac802154: Follow the number of associated devices > > mac802154: Handle disassociation notifications from peers > > ieee802154: Give the user the association list > > > > include/net/cfg802154.h | 69 ++++++ > > include/net/ieee802154_netdev.h | 60 +++++ > > include/net/nl802154.h | 22 +- > > net/ieee802154/Makefile | 2 +- > > net/ieee802154/core.c | 24 ++ > > net/ieee802154/nl802154.c | 223 +++++++++++++++++- > > net/ieee802154/pan.c | 115 +++++++++ > > net/ieee802154/rdev-ops.h | 30 +++ > > net/ieee802154/trace.h | 38 +++ > > net/mac802154/cfg.c | 170 ++++++++++++++ > > net/mac802154/ieee802154_i.h | 27 +++ > > net/mac802154/main.c | 2 + > > net/mac802154/rx.c | 25 ++ > > net/mac802154/scan.c | 397 ++++++++++++++++++++++++++++++++ > > 14 files changed, 1191 insertions(+), 13 deletions(-) > > create mode 100644 net/ieee802154/pan.c > > With my requests for patch 02/11 taken into account and the fallout for the experimental config options fixed (as krobot detected) I am happy with this patchset. > > Acked-by: Stefan Schmidt <stefan@xxxxxxxxxxxxxxxxxx> Great! Thanks a lot for the time spent. Cheers, Miquèl
