64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* IEEE 802.15.4 PAN management
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*
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* Copyright (C) 2023 Qorvo US, Inc
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* Authors:
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* - David Girault <david.girault@qorvo.com>
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* - Miquel Raynal <miquel.raynal@bootlin.com>
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*/
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#include <linux/kernel.h>
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#include <net/cfg802154.h>
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#include <net/af_ieee802154.h>
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/* Checks whether a device address matches one from the PAN list.
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* This helper is meant to be used only during PAN management, when we expect
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* extended addresses to be used.
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*/
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static bool cfg802154_pan_device_is_matching(struct ieee802154_pan_device *pan_dev,
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struct ieee802154_addr *ext_dev)
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{
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if (!pan_dev || !ext_dev)
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return false;
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if (ext_dev->mode == IEEE802154_ADDR_SHORT)
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return false;
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return pan_dev->extended_addr == ext_dev->extended_addr;
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}
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bool cfg802154_device_is_associated(struct wpan_dev *wpan_dev)
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{
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bool is_assoc;
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mutex_lock(&wpan_dev->association_lock);
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is_assoc = !list_empty(&wpan_dev->children) || wpan_dev->parent;
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mutex_unlock(&wpan_dev->association_lock);
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return is_assoc;
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}
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bool cfg802154_device_is_parent(struct wpan_dev *wpan_dev,
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struct ieee802154_addr *target)
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{
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lockdep_assert_held(&wpan_dev->association_lock);
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return cfg802154_pan_device_is_matching(wpan_dev->parent, target);
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}
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struct ieee802154_pan_device *
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cfg802154_device_is_child(struct wpan_dev *wpan_dev,
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struct ieee802154_addr *target)
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{
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struct ieee802154_pan_device *child;
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lockdep_assert_held(&wpan_dev->association_lock);
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list_for_each_entry(child, &wpan_dev->children, node)
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if (cfg802154_pan_device_is_matching(child, target))
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return child;
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return NULL;
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}
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