From patchwork Mon Sep 18 15:07:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 13389867 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 67A08CD37B0 for ; Mon, 18 Sep 2023 15:44:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229468AbjIRPob (ORCPT ); Mon, 18 Sep 2023 11:44:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53172 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229632AbjIRPo3 (ORCPT ); Mon, 18 Sep 2023 11:44:29 -0400 Received: from mslow1.mail.gandi.net (mslow1.mail.gandi.net [IPv6:2001:4b98:dc4:8::240]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E9E6B10A; Mon, 18 Sep 2023 08:43:00 -0700 (PDT) Received: from relay5-d.mail.gandi.net (unknown [IPv6:2001:4b98:dc4:8::225]) by mslow1.mail.gandi.net (Postfix) with ESMTP id 6AB81D18B1; Mon, 18 Sep 2023 15:08:25 +0000 (UTC) Received: by mail.gandi.net (Postfix) with ESMTPSA id 7515B1C0007; Mon, 18 Sep 2023 15:08:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1695049704; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=ICEwPkNaYsSfx6qOGqNqEqfrERmHi6fPl1ADzWGyEK0=; b=CSHHUcyHUDcGQ7PORq1Lv96qz9aNr689LddmmLIf4hfgAe/XSipg40omwzhozpy7hdhML6 sAi5q/er4cqweQM77hSgSwIovOgVbo0pFlvWqubCve37U1jFOOaWEHr+AQk2/360Jk6LE9 ggFJV/bEKju+YCImzwFm5Auh/dKhVAhTTN0tzE8A9F1oEaQUYgv+4odK4JKvGaBBxxhx6b 8rT77i6e/MaHArve+7AuuTDOAHJm0uwLaxSab6P5tJ5Sk7W8Q7iIZmt8nJukW4TX7Ckw+U wMlyvwMwRRn7ZNaJ6deHkeK976iPxQNTsVMiXP7ttnAKPGLSHvMRsV8TLmOCvw== From: Miquel Raynal To: Alexander Aring , Stefan Schmidt , linux-wpan@vger.kernel.org Cc: "David S. Miller" , Jakub Kicinski , Paolo Abeni , Eric Dumazet , netdev@vger.kernel.org, David Girault , Romuald Despres , Frederic Blain , Nicolas Schodet , Guilhem Imberton , Thomas Petazzoni , Miquel Raynal Subject: [PATCH wpan-next v3 00/11] ieee802154: Associations between devices Date: Mon, 18 Sep 2023 17:07:58 +0200 Message-Id: <20230918150809.275058-1-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-GND-Sasl: miquel.raynal@bootlin.com Precedence: bulk List-ID: X-Mailing-List: linux-wpan@vger.kernel.org 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 associate pan_id 2 coord $COORD iwpan dev list_associations iwpan 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 Acked-by: Stefan Schmidt