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Peers may decided to disassociate from us, their coordinator, in this case they will send a disassociation notification which we must acknowledge. If we don't, the peer device considers itself disassociated anyway. We also need to drop the reference to this child from our internal structures. 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/20230927181214.129346-11-miquel.raynal@bootlin.com
338 lines
10 KiB
C
338 lines
10 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2007-2012 Siemens AG
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*
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* Written by:
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* Pavel Smolenskiy <pavel.smolenskiy@gmail.com>
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* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
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* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
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*/
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#ifndef __IEEE802154_I_H
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#define __IEEE802154_I_H
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#include <linux/interrupt.h>
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#include <linux/mutex.h>
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#include <linux/hrtimer.h>
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#include <net/cfg802154.h>
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#include <net/mac802154.h>
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#include <net/nl802154.h>
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#include <net/ieee802154_netdev.h>
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#include "llsec.h"
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enum ieee802154_ongoing {
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IEEE802154_IS_SCANNING = BIT(0),
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IEEE802154_IS_BEACONING = BIT(1),
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IEEE802154_IS_ASSOCIATING = BIT(2),
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};
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/* mac802154 device private data */
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struct ieee802154_local {
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struct ieee802154_hw hw;
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const struct ieee802154_ops *ops;
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/* hardware address filter */
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struct ieee802154_hw_addr_filt addr_filt;
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/* ieee802154 phy */
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struct wpan_phy *phy;
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int open_count;
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/* As in mac80211 slaves list is modified:
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* 1) under the RTNL
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* 2) protected by slaves_mtx;
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* 3) in an RCU manner
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*
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* So atomic readers can use any of this protection methods.
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*/
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struct list_head interfaces;
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struct mutex iflist_mtx;
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/* Data related workqueue */
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struct workqueue_struct *workqueue;
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/* MAC commands related workqueue */
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struct workqueue_struct *mac_wq;
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struct hrtimer ifs_timer;
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/* Scanning */
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u8 scan_page;
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u8 scan_channel;
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struct ieee802154_beacon_req_frame scan_beacon_req;
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struct cfg802154_scan_request __rcu *scan_req;
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struct delayed_work scan_work;
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/* Beaconing */
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unsigned int beacon_interval;
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struct ieee802154_beacon_frame beacon;
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struct cfg802154_beacon_request __rcu *beacon_req;
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struct delayed_work beacon_work;
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/* Asynchronous tasks */
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struct list_head rx_beacon_list;
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struct work_struct rx_beacon_work;
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struct list_head rx_mac_cmd_list;
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struct work_struct rx_mac_cmd_work;
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/* Association */
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struct ieee802154_pan_device *assoc_dev;
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struct completion assoc_done;
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__le16 assoc_addr;
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u8 assoc_status;
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struct work_struct assoc_work;
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bool started;
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bool suspended;
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unsigned long ongoing;
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struct tasklet_struct tasklet;
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struct sk_buff_head skb_queue;
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struct sk_buff *tx_skb;
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struct work_struct sync_tx_work;
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/* A negative Linux error code or a null/positive MLME error status */
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int tx_result;
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};
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enum {
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IEEE802154_RX_MSG = 1,
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};
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enum ieee802154_sdata_state_bits {
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SDATA_STATE_RUNNING,
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};
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/* Slave interface definition.
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*
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* Slaves represent typical network interfaces available from userspace.
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* Each ieee802154 device/transceiver may have several slaves and able
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* to be associated with several networks at the same time.
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*/
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struct ieee802154_sub_if_data {
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struct list_head list; /* the ieee802154_priv->slaves list */
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struct wpan_dev wpan_dev;
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struct ieee802154_local *local;
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struct net_device *dev;
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/* Each interface starts and works in nominal state at a given filtering
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* level given by iface_default_filtering, which is set once for all at
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* the interface creation and should not evolve over time. For some MAC
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* operations however, the filtering level may change temporarily, as
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* reflected in the required_filtering field. The actual filtering at
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* the PHY level may be different and is shown in struct wpan_phy.
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*/
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enum ieee802154_filtering_level iface_default_filtering;
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enum ieee802154_filtering_level required_filtering;
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unsigned long state;
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char name[IFNAMSIZ];
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/* protects sec from concurrent access by netlink. access by
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* encrypt/decrypt/header_create safe without additional protection.
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*/
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struct mutex sec_mtx;
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struct mac802154_llsec sec;
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};
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/* utility functions/constants */
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extern const void *const mac802154_wpan_phy_privid; /* for wpan_phy privid */
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static inline struct ieee802154_local *
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hw_to_local(struct ieee802154_hw *hw)
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{
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return container_of(hw, struct ieee802154_local, hw);
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}
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static inline struct ieee802154_sub_if_data *
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IEEE802154_DEV_TO_SUB_IF(const struct net_device *dev)
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{
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return netdev_priv(dev);
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}
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static inline struct ieee802154_sub_if_data *
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IEEE802154_WPAN_DEV_TO_SUB_IF(struct wpan_dev *wpan_dev)
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{
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return container_of(wpan_dev, struct ieee802154_sub_if_data, wpan_dev);
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}
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static inline bool
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ieee802154_sdata_running(struct ieee802154_sub_if_data *sdata)
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{
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return test_bit(SDATA_STATE_RUNNING, &sdata->state);
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}
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static inline int ieee802154_get_mac_cmd(struct sk_buff *skb, u8 *mac_cmd)
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{
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struct ieee802154_mac_cmd_pl mac_pl;
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int ret;
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if (mac_cb(skb)->type != IEEE802154_FC_TYPE_MAC_CMD)
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return -EINVAL;
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ret = ieee802154_mac_cmd_pl_pull(skb, &mac_pl);
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if (ret)
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return ret;
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*mac_cmd = mac_pl.cmd_id;
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return 0;
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}
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extern struct ieee802154_mlme_ops mac802154_mlme_wpan;
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void ieee802154_rx(struct ieee802154_local *local, struct sk_buff *skb);
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void ieee802154_xmit_sync_worker(struct work_struct *work);
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int ieee802154_sync_and_hold_queue(struct ieee802154_local *local);
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int ieee802154_mlme_op_pre(struct ieee802154_local *local);
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int ieee802154_mlme_tx(struct ieee802154_local *local,
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struct ieee802154_sub_if_data *sdata,
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struct sk_buff *skb);
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int ieee802154_mlme_tx_locked(struct ieee802154_local *local,
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struct ieee802154_sub_if_data *sdata,
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struct sk_buff *skb);
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void ieee802154_mlme_op_post(struct ieee802154_local *local);
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int ieee802154_mlme_tx_one(struct ieee802154_local *local,
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struct ieee802154_sub_if_data *sdata,
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struct sk_buff *skb);
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int ieee802154_mlme_tx_one_locked(struct ieee802154_local *local,
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struct ieee802154_sub_if_data *sdata,
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struct sk_buff *skb);
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netdev_tx_t
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ieee802154_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
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netdev_tx_t
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ieee802154_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
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enum hrtimer_restart ieee802154_xmit_ifs_timer(struct hrtimer *timer);
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/**
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* ieee802154_hold_queue - hold ieee802154 queue
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* @local: main mac object
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*
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* Hold a queue by incrementing an atomic counter and requesting the netif
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* queues to be stopped. The queues cannot be woken up while the counter has not
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* been reset with as any ieee802154_release_queue() calls as needed.
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*/
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void ieee802154_hold_queue(struct ieee802154_local *local);
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/**
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* ieee802154_release_queue - release ieee802154 queue
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* @local: main mac object
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*
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* Release a queue which is held by decrementing an atomic counter and wake it
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* up only if the counter reaches 0.
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*/
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void ieee802154_release_queue(struct ieee802154_local *local);
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/**
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* ieee802154_disable_queue - disable ieee802154 queue
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* @local: main mac object
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*
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* When trying to sync the Tx queue, we cannot just stop the queue
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* (which is basically a bit being set without proper lock handling)
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* because it would be racy. We actually need to call netif_tx_disable()
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* instead, which is done by this helper. Restarting the queue can
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* however still be done with a regular wake call.
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*/
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void ieee802154_disable_queue(struct ieee802154_local *local);
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/* MIB callbacks */
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void mac802154_dev_set_page_channel(struct net_device *dev, u8 page, u8 chan);
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int mac802154_get_params(struct net_device *dev,
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struct ieee802154_llsec_params *params);
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int mac802154_set_params(struct net_device *dev,
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const struct ieee802154_llsec_params *params,
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int changed);
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int mac802154_add_key(struct net_device *dev,
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const struct ieee802154_llsec_key_id *id,
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const struct ieee802154_llsec_key *key);
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int mac802154_del_key(struct net_device *dev,
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const struct ieee802154_llsec_key_id *id);
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int mac802154_add_dev(struct net_device *dev,
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const struct ieee802154_llsec_device *llsec_dev);
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int mac802154_del_dev(struct net_device *dev, __le64 dev_addr);
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int mac802154_add_devkey(struct net_device *dev,
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__le64 device_addr,
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const struct ieee802154_llsec_device_key *key);
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int mac802154_del_devkey(struct net_device *dev,
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__le64 device_addr,
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const struct ieee802154_llsec_device_key *key);
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int mac802154_add_seclevel(struct net_device *dev,
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const struct ieee802154_llsec_seclevel *sl);
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int mac802154_del_seclevel(struct net_device *dev,
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const struct ieee802154_llsec_seclevel *sl);
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void mac802154_lock_table(struct net_device *dev);
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void mac802154_get_table(struct net_device *dev,
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struct ieee802154_llsec_table **t);
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void mac802154_unlock_table(struct net_device *dev);
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int mac802154_wpan_update_llsec(struct net_device *dev);
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/* PAN management handling */
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void mac802154_scan_worker(struct work_struct *work);
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int mac802154_trigger_scan_locked(struct ieee802154_sub_if_data *sdata,
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struct cfg802154_scan_request *request);
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int mac802154_abort_scan_locked(struct ieee802154_local *local,
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struct ieee802154_sub_if_data *sdata);
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int mac802154_process_beacon(struct ieee802154_local *local,
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struct sk_buff *skb,
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u8 page, u8 channel);
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void mac802154_rx_beacon_worker(struct work_struct *work);
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static inline bool mac802154_is_scanning(struct ieee802154_local *local)
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{
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return test_bit(IEEE802154_IS_SCANNING, &local->ongoing);
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}
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void mac802154_beacon_worker(struct work_struct *work);
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int mac802154_send_beacons_locked(struct ieee802154_sub_if_data *sdata,
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struct cfg802154_beacon_request *request);
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int mac802154_stop_beacons_locked(struct ieee802154_local *local,
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struct ieee802154_sub_if_data *sdata);
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static inline bool mac802154_is_beaconing(struct ieee802154_local *local)
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{
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return test_bit(IEEE802154_IS_BEACONING, &local->ongoing);
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}
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void mac802154_rx_mac_cmd_worker(struct work_struct *work);
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int mac802154_perform_association(struct ieee802154_sub_if_data *sdata,
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struct ieee802154_pan_device *coord,
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__le16 *short_addr);
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int mac802154_process_association_resp(struct ieee802154_sub_if_data *sdata,
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struct sk_buff *skb);
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static inline bool mac802154_is_associating(struct ieee802154_local *local)
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{
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return test_bit(IEEE802154_IS_ASSOCIATING, &local->ongoing);
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}
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int mac802154_send_disassociation_notif(struct ieee802154_sub_if_data *sdata,
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struct ieee802154_pan_device *target,
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u8 reason);
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int mac802154_process_disassociation_notif(struct ieee802154_sub_if_data *sdata,
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struct sk_buff *skb);
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int mac802154_process_association_req(struct ieee802154_sub_if_data *sdata,
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struct sk_buff *skb);
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/* interface handling */
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int ieee802154_iface_init(void);
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void ieee802154_iface_exit(void);
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void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata);
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struct net_device *
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ieee802154_if_add(struct ieee802154_local *local, const char *name,
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unsigned char name_assign_type, enum nl802154_iftype type,
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__le64 extended_addr);
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void ieee802154_remove_interfaces(struct ieee802154_local *local);
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void ieee802154_stop_device(struct ieee802154_local *local);
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#endif /* __IEEE802154_I_H */
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