ieee80211_i.h 33.6 KB
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/*
 * Copyright 2002-2005, Instant802 Networks, Inc.
 * Copyright 2005, Devicescape Software, Inc.
 * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
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 * Copyright 2007-2008	Johannes Berg <johannes@sipsolutions.net>
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 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef IEEE80211_I_H
#define IEEE80211_I_H

#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/if_ether.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/workqueue.h>
#include <linux/types.h>
#include <linux/spinlock.h>
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#include <linux/etherdevice.h>
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#include <net/cfg80211.h>
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#include <net/mac80211.h>
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#include "key.h"
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#include "sta_info.h"

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struct ieee80211_local;
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/* Maximum number of broadcast/multicast frames to buffer when some of the
 * associated stations are using power saving. */
#define AP_MAX_BC_BUFFER 128

/* Maximum number of frames buffered to all STAs, including multicast frames.
 * Note: increasing this limit increases the potential memory requirement. Each
 * frame can be up to about 2 kB long. */
#define TOTAL_MAX_TX_BUFFER 512

/* Required encryption head and tailroom */
#define IEEE80211_ENCRYPT_HEADROOM 8
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#define IEEE80211_ENCRYPT_TAILROOM 18
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/* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
 * reception of at least three fragmented frames. This limit can be increased
 * by changing this define, at the cost of slower frame reassembly and
 * increased memory use (about 2 kB of RAM per entry). */
#define IEEE80211_FRAGMENT_MAX 4

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/*
 * Time after which we ignore scan results and no longer report/use
 * them in any way.
 */
#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)

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#define TU_TO_EXP_TIME(x)	(jiffies + usecs_to_jiffies((x) * 1024))

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struct ieee80211_fragment_entry {
	unsigned long first_frag_time;
	unsigned int seq;
	unsigned int rx_queue;
	unsigned int last_frag;
	unsigned int extra_len;
	struct sk_buff_head skb_list;
	int ccmp; /* Whether fragments were encrypted with CCMP */
	u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
};


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struct ieee80211_bss {
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	/* Yes, this is a hack */
	struct cfg80211_bss cbss;
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	/* don't want to look up all the time */
	size_t ssid_len;
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	u8 ssid[IEEE80211_MAX_SSID_LEN];
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	u8 dtim_period;
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	bool wmm_used;
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	unsigned long last_probe_resp;

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#ifdef CONFIG_MAC80211_MESH
	u8 *mesh_id;
	size_t mesh_id_len;
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	u8 *mesh_cfg;
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#endif
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#define IEEE80211_MAX_SUPP_RATES 32
	u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
	size_t supp_rates_len;

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	/*
	 * During assocation, we save an ERP value from a probe response so
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	 * that we can feed ERP info to the driver when handling the
	 * association completes. these fields probably won't be up-to-date
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	 * otherwise, you probably don't want to use them.
	 */
	bool has_erp_value;
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	u8 erp_value;
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};

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static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
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{
#ifdef CONFIG_MAC80211_MESH
	return bss->mesh_cfg;
#endif
	return NULL;
}

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static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
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{
#ifdef CONFIG_MAC80211_MESH
	return bss->mesh_id;
#endif
	return NULL;
}

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static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
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{
#ifdef CONFIG_MAC80211_MESH
	return bss->mesh_id_len;
#endif
	return 0;
}

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typedef unsigned __bitwise__ ieee80211_tx_result;
#define TX_CONTINUE	((__force ieee80211_tx_result) 0u)
#define TX_DROP		((__force ieee80211_tx_result) 1u)
#define TX_QUEUED	((__force ieee80211_tx_result) 2u)

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#define IEEE80211_TX_FRAGMENTED		BIT(0)
#define IEEE80211_TX_UNICAST		BIT(1)
#define IEEE80211_TX_PS_BUFFERED	BIT(2)

struct ieee80211_tx_data {
	struct sk_buff *skb;
	struct net_device *dev;
	struct ieee80211_local *local;
	struct ieee80211_sub_if_data *sdata;
	struct sta_info *sta;
	struct ieee80211_key *key;

	struct ieee80211_channel *channel;

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	u16 ethertype;
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	unsigned int flags;
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};


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typedef unsigned __bitwise__ ieee80211_rx_result;
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#define RX_CONTINUE		((__force ieee80211_rx_result) 0u)
#define RX_DROP_UNUSABLE	((__force ieee80211_rx_result) 1u)
#define RX_DROP_MONITOR		((__force ieee80211_rx_result) 2u)
#define RX_QUEUED		((__force ieee80211_rx_result) 3u)
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#define IEEE80211_RX_IN_SCAN		BIT(0)
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/* frame is destined to interface currently processed (incl. multicast frames) */
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#define IEEE80211_RX_RA_MATCH		BIT(1)
#define IEEE80211_RX_AMSDU		BIT(2)
#define IEEE80211_RX_CMNTR_REPORTED	BIT(3)
#define IEEE80211_RX_FRAGMENTED		BIT(4)

struct ieee80211_rx_data {
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	struct sk_buff *skb;
	struct net_device *dev;
	struct ieee80211_local *local;
	struct ieee80211_sub_if_data *sdata;
	struct sta_info *sta;
	struct ieee80211_key *key;
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	struct ieee80211_rx_status *status;
	struct ieee80211_rate *rate;
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	unsigned int flags;
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	int sent_ps_buffered;
	int queue;
	u32 tkip_iv32;
	u16 tkip_iv16;
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};

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struct beacon_data {
	u8 *head, *tail;
	int head_len, tail_len;
	int dtim_period;
};

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struct ieee80211_if_ap {
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	struct beacon_data *beacon;
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	struct list_head vlans;

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	/* yes, this looks ugly, but guarantees that we can later use
	 * bitmap_empty :)
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	 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
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	u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
	struct sk_buff_head ps_bc_buf;
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	atomic_t num_sta_ps; /* number of stations in PS mode */
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	int dtim_count;
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};

struct ieee80211_if_wds {
	struct sta_info *sta;
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	u8 remote_addr[ETH_ALEN];
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};

struct ieee80211_if_vlan {
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	struct list_head list;
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};

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struct mesh_stats {
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	__u32 fwded_mcast;		/* Mesh forwarded multicast frames */
	__u32 fwded_unicast;		/* Mesh forwarded unicast frames */
	__u32 fwded_frames;		/* Mesh total forwarded frames */
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	__u32 dropped_frames_ttl;	/* Not transmitted since mesh_ttl == 0*/
	__u32 dropped_frames_no_route;	/* Not transmitted, no route found */
	atomic_t estab_plinks;
};

#define PREQ_Q_F_START		0x1
#define PREQ_Q_F_REFRESH	0x2
struct mesh_preq_queue {
	struct list_head list;
	u8 dst[ETH_ALEN];
	u8 flags;
};

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enum ieee80211_mgd_state {
	IEEE80211_MGD_STATE_IDLE,
	IEEE80211_MGD_STATE_PROBE,
	IEEE80211_MGD_STATE_AUTH,
	IEEE80211_MGD_STATE_ASSOC,
};

struct ieee80211_mgd_work {
	struct list_head list;
	struct ieee80211_bss *bss;
	int ie_len;
	u8 prev_bssid[ETH_ALEN];
	u8 ssid[IEEE80211_MAX_SSID_LEN];
	u8 ssid_len;
	unsigned long timeout;
	enum ieee80211_mgd_state state;
	u16 auth_alg, auth_transaction;

	int tries;

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	u8 key[WLAN_KEY_LEN_WEP104];
	u8 key_len, key_idx;

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	/* must be last */
	u8 ie[0]; /* for auth or assoc frame, not probe */
};

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/* flags used in struct ieee80211_if_managed.flags */
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enum ieee80211_sta_flags {
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	IEEE80211_STA_BEACON_POLL	= BIT(0),
	IEEE80211_STA_CONNECTION_POLL	= BIT(1),
	IEEE80211_STA_CONTROL_PORT	= BIT(2),
	IEEE80211_STA_WMM_ENABLED	= BIT(3),
	IEEE80211_STA_DISABLE_11N	= BIT(4),
	IEEE80211_STA_CSA_RECEIVED	= BIT(5),
	IEEE80211_STA_MFP_ENABLED	= BIT(6),
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};

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/* flags for MLME request */
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enum ieee80211_sta_request {
	IEEE80211_STA_REQ_SCAN,
};
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struct ieee80211_if_managed {
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	struct timer_list timer;
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	struct timer_list conn_mon_timer;
	struct timer_list bcn_mon_timer;
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	struct timer_list chswitch_timer;
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	struct work_struct work;
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	struct work_struct monitor_work;
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	struct work_struct chswitch_work;
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	struct work_struct beacon_loss_work;
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	unsigned long probe_timeout;
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	int probe_send_count;
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	struct mutex mtx;
	struct ieee80211_bss *associated;
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	struct ieee80211_mgd_work *old_associate_work;
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	struct list_head work_list;
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	u8 bssid[ETH_ALEN];
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	u16 aid;
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	u16 capab;
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	struct sk_buff_head skb_queue;

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	unsigned long timers_running; /* used for quiesce/restart */
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	bool powersave; /* powersave requested for this iface */

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	unsigned long request;

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	unsigned int flags;
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	u32 beacon_crc;

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	enum {
		IEEE80211_MFP_DISABLED,
		IEEE80211_MFP_OPTIONAL,
		IEEE80211_MFP_REQUIRED
	} mfp; /* management frame protection */

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	int wmm_last_param_set;
};

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enum ieee80211_ibss_request {
	IEEE80211_IBSS_REQ_RUN	= 0,
};

struct ieee80211_if_ibss {
	struct timer_list timer;
	struct work_struct work;

	struct sk_buff_head skb_queue;

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	unsigned long request;
	unsigned long last_scan_completed;
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	bool timer_running;

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	bool fixed_bssid;
	bool fixed_channel;
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	bool privacy;
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	u8 bssid[ETH_ALEN];
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	u8 ssid[IEEE80211_MAX_SSID_LEN];
	u8 ssid_len, ie_len;
	u8 *ie;
	struct ieee80211_channel *channel;
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	unsigned long ibss_join_req;
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	/* probe response/beacon for IBSS */
	struct sk_buff *presp, *skb;
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	enum {
		IEEE80211_IBSS_MLME_SEARCH,
		IEEE80211_IBSS_MLME_JOINED,
	} state;
};

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struct ieee80211_if_mesh {
	struct work_struct work;
	struct timer_list housekeeping_timer;
	struct timer_list mesh_path_timer;
	struct sk_buff_head skb_queue;

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	unsigned long timers_running;

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	unsigned long wrkq_flags;
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	u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
	size_t mesh_id_len;
	/* Active Path Selection Protocol Identifier */
	u8 mesh_pp_id[4];
	/* Active Path Selection Metric Identifier */
	u8 mesh_pm_id[4];
	/* Congestion Control Mode Identifier */
	u8 mesh_cc_id[4];
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	/* Synchronization Protocol Identifier */
	u8 mesh_sp_id[4];
	/* Authentication Protocol Identifier */
	u8 mesh_auth_id[4];
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	/* Local mesh Destination Sequence Number */
	u32 dsn;
	/* Last used PREQ ID */
	u32 preq_id;
	atomic_t mpaths;
	/* Timestamp of last DSN update */
	unsigned long last_dsn_update;
	/* Timestamp of last DSN sent */
	unsigned long last_preq;
	struct mesh_rmc *rmc;
	spinlock_t mesh_preq_queue_lock;
	struct mesh_preq_queue preq_queue;
	int preq_queue_len;
	struct mesh_stats mshstats;
	struct mesh_config mshcfg;
	u32 mesh_seqnum;
	bool accepting_plinks;
};
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#ifdef CONFIG_MAC80211_MESH
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#define IEEE80211_IFSTA_MESH_CTR_INC(msh, name)	\
	do { (msh)->mshstats.name++; } while (0)
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#else
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#define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
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	do { } while (0)
#endif
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/**
 * enum ieee80211_sub_if_data_flags - virtual interface flags
 *
 * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 * @IEEE80211_SDATA_PROMISC: interface is promisc
 * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 *	associated stations and deliver multicast frames both
 *	back to wireless media and to the local net stack.
 */
enum ieee80211_sub_if_data_flags {
	IEEE80211_SDATA_ALLMULTI		= BIT(0),
	IEEE80211_SDATA_PROMISC			= BIT(1),
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	IEEE80211_SDATA_OPERATING_GMODE		= BIT(2),
	IEEE80211_SDATA_DONT_BRIDGE_PACKETS	= BIT(3),
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};

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struct ieee80211_sub_if_data {
	struct list_head list;

	struct wireless_dev wdev;

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	/* keys */
	struct list_head key_list;

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	struct net_device *dev;
	struct ieee80211_local *local;

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	unsigned int flags;
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	int drop_unencrypted;

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	/*
	 * keep track of whether the HT opmode (stored in
	 * vif.bss_info.ht_operation_mode) is valid.
	 */
	bool ht_opmode_valid;

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	/* Fragment table for host-based reassembly */
	struct ieee80211_fragment_entry	fragments[IEEE80211_FRAGMENT_MAX];
	unsigned int fragment_next;

#define NUM_DEFAULT_KEYS 4
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#define NUM_DEFAULT_MGMT_KEYS 2
	struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
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	struct ieee80211_key *default_key;
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	struct ieee80211_key *default_mgmt_key;
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	u16 sequence_number;

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	/*
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	 * AP this belongs to: self in AP mode and
	 * corresponding AP in VLAN mode, NULL for
	 * all others (might be needed later in IBSS)
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	 */
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	struct ieee80211_if_ap *bss;

	int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
	int max_ratectrl_rateidx; /* max TX rateidx for rate control */
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	union {
		struct ieee80211_if_ap ap;
		struct ieee80211_if_wds wds;
		struct ieee80211_if_vlan vlan;
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		struct ieee80211_if_managed mgd;
		struct ieee80211_if_ibss ibss;
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#ifdef CONFIG_MAC80211_MESH
		struct ieee80211_if_mesh mesh;
#endif
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		u32 mntr_flags;
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	} u;
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#ifdef CONFIG_MAC80211_DEBUGFS
	struct dentry *debugfsdir;
	union {
		struct {
			struct dentry *drop_unencrypted;
			struct dentry *bssid;
			struct dentry *aid;
			struct dentry *capab;
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			struct dentry *force_unicast_rateidx;
			struct dentry *max_ratectrl_rateidx;
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		} sta;
		struct {
			struct dentry *drop_unencrypted;
			struct dentry *num_sta_ps;
			struct dentry *dtim_count;
			struct dentry *force_unicast_rateidx;
			struct dentry *max_ratectrl_rateidx;
			struct dentry *num_buffered_multicast;
		} ap;
		struct {
			struct dentry *drop_unencrypted;
			struct dentry *peer;
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			struct dentry *force_unicast_rateidx;
			struct dentry *max_ratectrl_rateidx;
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		} wds;
		struct {
			struct dentry *drop_unencrypted;
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			struct dentry *force_unicast_rateidx;
			struct dentry *max_ratectrl_rateidx;
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		} vlan;
		struct {
			struct dentry *mode;
		} monitor;
	} debugfs;
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	struct {
		struct dentry *default_key;
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		struct dentry *default_mgmt_key;
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	} common_debugfs;
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#ifdef CONFIG_MAC80211_MESH
	struct dentry *mesh_stats_dir;
	struct {
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		struct dentry *fwded_mcast;
		struct dentry *fwded_unicast;
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		struct dentry *fwded_frames;
		struct dentry *dropped_frames_ttl;
		struct dentry *dropped_frames_no_route;
		struct dentry *estab_plinks;
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		struct timer_list mesh_path_timer;
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	} mesh_stats;

	struct dentry *mesh_config_dir;
	struct {
		struct dentry *dot11MeshRetryTimeout;
		struct dentry *dot11MeshConfirmTimeout;
		struct dentry *dot11MeshHoldingTimeout;
		struct dentry *dot11MeshMaxRetries;
		struct dentry *dot11MeshTTL;
		struct dentry *auto_open_plinks;
		struct dentry *dot11MeshMaxPeerLinks;
		struct dentry *dot11MeshHWMPactivePathTimeout;
		struct dentry *dot11MeshHWMPpreqMinInterval;
		struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
		struct dentry *dot11MeshHWMPmaxPREQretries;
		struct dentry *path_refresh_time;
		struct dentry *min_discovery_timeout;
	} mesh_config;
#endif

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#endif
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	/* must be last, dynamically sized area in this! */
	struct ieee80211_vif vif;
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};

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static inline
struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
{
	return container_of(p, struct ieee80211_sub_if_data, vif);
}

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static inline void
ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
			    u8 mesh_id_len, u8 *mesh_id)
{
#ifdef CONFIG_MAC80211_MESH
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
	ifmsh->mesh_id_len = mesh_id_len;
	memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
#else
	WARN_ON(1);
#endif
}

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enum {
	IEEE80211_RX_MSG	= 1,
	IEEE80211_TX_STATUS_MSG	= 2,
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	IEEE80211_DELBA_MSG	= 3,
	IEEE80211_ADDBA_MSG	= 4,
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};

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enum queue_stop_reason {
	IEEE80211_QUEUE_STOP_REASON_DRIVER,
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	IEEE80211_QUEUE_STOP_REASON_PS,
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	IEEE80211_QUEUE_STOP_REASON_CSA,
	IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
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	IEEE80211_QUEUE_STOP_REASON_SUSPEND,
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	IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
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};

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/**
 * mac80211 scan flags - currently active scan mode
 *
 * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
 *	well be on the operating channel
 * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
 *	determine if we are on the operating channel or not
 * @SCAN_OFF_CHANNEL: We're off our operating channel for scanning,
 *	gets only set in conjunction with SCAN_SW_SCANNING
 */
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enum {
	SCAN_SW_SCANNING,
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	SCAN_HW_SCANNING,
	SCAN_OFF_CHANNEL,
};

/**
 * enum mac80211_scan_state - scan state machine states
 *
 * @SCAN_DECISION: Main entry point to the scan state machine, this state
 *	determines if we should keep on scanning or switch back to the
 *	operating channel
 * @SCAN_SET_CHANNEL: Set the next channel to be scanned
 * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
 * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP
 *	about us leaving the channel and stop all associated STA interfaces
 * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the
 *	AP about us being back and restart all associated STA interfaces
 */
enum mac80211_scan_state {
	SCAN_DECISION,
	SCAN_SET_CHANNEL,
	SCAN_SEND_PROBE,
	SCAN_LEAVE_OPER_CHANNEL,
	SCAN_ENTER_OPER_CHANNEL,
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};

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struct ieee80211_local {
	/* embed the driver visible part.
	 * don't cast (use the static inlines below), but we keep
	 * it first anyway so they become a no-op */
	struct ieee80211_hw hw;

	const struct ieee80211_ops *ops;

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	/*
	 * private workqueue to mac80211. mac80211 makes this accessible
	 * via ieee80211_queue_work()
	 */
	struct workqueue_struct *workqueue;

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	unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
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	/* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
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	spinlock_t queue_stop_reason_lock;
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	int open_count;
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	int monitors, cooked_mntrs;
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	/* number of interfaces with corresponding FIF_ flags */
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	int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll;
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	unsigned int filter_flags; /* FIF_* */
642
	struct iw_statistics wstats;
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	/* protects the aggregated multicast list and filter calls */
	spinlock_t filter_lock;

647 648 649
	/* used for uploading changed mc list */
	struct work_struct reconfig_filter;

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	/* aggregated multicast list */
	struct dev_addr_list *mc_list;
	int mc_count;

654
	bool tim_in_locked_section; /* see ieee80211_beacon_get() */
655 656 657 658 659 660 661 662 663 664 665 666 667 668 669

	/*
	 * suspended is true if we finished all the suspend _and_ we have
	 * not yet come up from resume. This is to be used by mac80211
	 * to ensure driver sanity during suspend and mac80211's own
	 * sanity. It can eventually be used for WoW as well.
	 */
	bool suspended;

	/*
	 * quiescing is true during the suspend process _only_ to
	 * ease timer cancelling etc.
	 */
	bool quiescing;

670 671 672
	/* device is started */
	bool started;

673
	int tx_headroom; /* required headroom for hardware/radiotap */
674 675 676 677 678 679 680 681 682 683

	/* Tasklet and skb queue to process calls from IRQ mode. All frames
	 * added to skb_queue will be processed, but frames in
	 * skb_queue_unreliable may be dropped if the total length of these
	 * queues increases over the limit. */
#define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
	struct tasklet_struct tasklet;
	struct sk_buff_head skb_queue;
	struct sk_buff_head skb_queue_unreliable;

684 685 686 687
	/* Station data */
	/*
	 * The lock only protects the list, hash, timer and counter
	 * against manipulation, reads are done in RCU. Additionally,
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	 * the lock protects each BSS's TIM bitmap.
689 690 691
	 */
	spinlock_t sta_lock;
	unsigned long num_sta;
692 693 694
	struct list_head sta_list;
	struct sta_info *sta_hash[STA_HASH_SIZE];
	struct timer_list sta_cleanup;
695
	int sta_generation;
696

697
	struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
698 699
	struct tasklet_struct tx_pending_tasklet;

700 701 702 703 704 705 706 707
	/*
	 * This lock is used to prevent concurrent A-MPDU
	 * session start/stop processing, this thus also
	 * synchronises the ->ampdu_action() callback to
	 * drivers and limits it to one at a time.
	 */
	spinlock_t ampdu_lock;

708 709
	/* number of interfaces with corresponding IFF_ flags */
	atomic_t iff_allmultis, iff_promiscs;
710 711 712 713 714 715 716

	struct rate_control_ref *rate_ctrl;

	struct crypto_blkcipher *wep_tx_tfm;
	struct crypto_blkcipher *wep_rx_tfm;
	u32 wep_iv;

717
	/* see iface.c */
718
	struct list_head interfaces;
719
	struct mutex iflist_mtx;
720

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	/*
	 * Key lock, protects sdata's key_list and sta_info's
	 * key pointers (write access, they're RCU.)
	 */
	spinlock_t key_lock;


728
	/* Scanning and BSS list */
729
	struct mutex scan_mtx;
730
	unsigned long scanning;
731
	struct cfg80211_ssid scan_ssid;
732
	struct cfg80211_scan_request *int_scan_req;
733 734
	struct cfg80211_scan_request *scan_req;
	struct ieee80211_channel *scan_channel;
735 736
	const u8 *orig_ies;
	int orig_ies_len;
737
	int scan_channel_idx;
738
	int scan_ies_len;
739

740
	enum mac80211_scan_state next_scan_state;
741
	struct delayed_work scan_work;
742
	struct ieee80211_sub_if_data *scan_sdata;
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	enum nl80211_channel_type oper_channel_type;
744
	struct ieee80211_channel *oper_channel, *csa_channel;
745 746 747 748 749 750 751 752 753 754 755 756 757 758 759

	/* SNMP counters */
	/* dot11CountersTable */
	u32 dot11TransmittedFragmentCount;
	u32 dot11MulticastTransmittedFrameCount;
	u32 dot11FailedCount;
	u32 dot11RetryCount;
	u32 dot11MultipleRetryCount;
	u32 dot11FrameDuplicateCount;
	u32 dot11ReceivedFragmentCount;
	u32 dot11MulticastReceivedFrameCount;
	u32 dot11TransmittedFrameCount;

#ifdef CONFIG_MAC80211_LEDS
	int tx_led_counter, rx_led_counter;
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	struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
	char tx_led_name[32], rx_led_name[32],
	     assoc_led_name[32], radio_led_name[32];
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#endif

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#ifdef CONFIG_MAC80211_DEBUGFS
	struct work_struct sta_debugfs_add;
#endif

769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800
#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
	/* TX/RX handler statistics */
	unsigned int tx_handlers_drop;
	unsigned int tx_handlers_queued;
	unsigned int tx_handlers_drop_unencrypted;
	unsigned int tx_handlers_drop_fragment;
	unsigned int tx_handlers_drop_wep;
	unsigned int tx_handlers_drop_not_assoc;
	unsigned int tx_handlers_drop_unauth_port;
	unsigned int rx_handlers_drop;
	unsigned int rx_handlers_queued;
	unsigned int rx_handlers_drop_nullfunc;
	unsigned int rx_handlers_drop_defrag;
	unsigned int rx_handlers_drop_short;
	unsigned int rx_handlers_drop_passive_scan;
	unsigned int tx_expand_skb_head;
	unsigned int tx_expand_skb_head_cloned;
	unsigned int rx_expand_skb_head;
	unsigned int rx_expand_skb_head2;
	unsigned int rx_handlers_fragments;
	unsigned int tx_status_drop;
#define I802_DEBUG_INC(c) (c)++
#else /* CONFIG_MAC80211_DEBUG_COUNTERS */
#define I802_DEBUG_INC(c) do { } while (0)
#endif /* CONFIG_MAC80211_DEBUG_COUNTERS */


	int total_ps_buffered; /* total number of all buffered unicast and
				* multicast packets for power saving stations
				*/
	int wifi_wme_noack_test;
	unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
801

802
	bool pspolling;
803 804 805 806 807
	/*
	 * PS can only be enabled when we have exactly one managed
	 * interface (and monitors) in PS, this then points there.
	 */
	struct ieee80211_sub_if_data *ps_sdata;
808 809 810
	struct work_struct dynamic_ps_enable_work;
	struct work_struct dynamic_ps_disable_work;
	struct timer_list dynamic_ps_timer;
811
	struct notifier_block network_latency_notifier;
812

813
	int user_power_level; /* in dBm */
814
	int power_constr_level; /* in dBm */
815

816 817
	struct work_struct restart_work;

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#ifdef CONFIG_MAC80211_DEBUGFS
	struct local_debugfsdentries {
820 821
		struct dentry *rcdir;
		struct dentry *rcname;
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		struct dentry *frequency;
		struct dentry *total_ps_buffered;
		struct dentry *wep_iv;
825
		struct dentry *tsf;
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		struct dentry *queues;
827
		struct dentry *reset;
828
		struct dentry *noack;
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		struct dentry *statistics;
		struct local_debugfsdentries_statsdentries {
			struct dentry *transmitted_fragment_count;
			struct dentry *multicast_transmitted_frame_count;
			struct dentry *failed_count;
			struct dentry *retry_count;
			struct dentry *multiple_retry_count;
			struct dentry *frame_duplicate_count;
			struct dentry *received_fragment_count;
			struct dentry *multicast_received_frame_count;
			struct dentry *transmitted_frame_count;
			struct dentry *wep_undecryptable_count;
			struct dentry *num_scans;
#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
			struct dentry *tx_handlers_drop;
			struct dentry *tx_handlers_queued;
			struct dentry *tx_handlers_drop_unencrypted;
			struct dentry *tx_handlers_drop_fragment;
			struct dentry *tx_handlers_drop_wep;
			struct dentry *tx_handlers_drop_not_assoc;
			struct dentry *tx_handlers_drop_unauth_port;
			struct dentry *rx_handlers_drop;
			struct dentry *rx_handlers_queued;
			struct dentry *rx_handlers_drop_nullfunc;
			struct dentry *rx_handlers_drop_defrag;
			struct dentry *rx_handlers_drop_short;
			struct dentry *rx_handlers_drop_passive_scan;
			struct dentry *tx_expand_skb_head;
			struct dentry *tx_expand_skb_head_cloned;
			struct dentry *rx_expand_skb_head;
			struct dentry *rx_expand_skb_head2;
			struct dentry *rx_handlers_fragments;
			struct dentry *tx_status_drop;
#endif
			struct dentry *dot11ACKFailureCount;
			struct dentry *dot11RTSFailureCount;
			struct dentry *dot11FCSErrorCount;
			struct dentry *dot11RTSSuccessCount;
		} stats;
		struct dentry *stations;
		struct dentry *keys;
	} debugfs;
#endif
872 873
};

874 875 876 877 878 879
static inline struct ieee80211_sub_if_data *
IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
{
	return netdev_priv(dev);
}

880 881 882 883 884 885
/* this struct represents 802.11n's RA/TID combination */
struct ieee80211_ra_tid {
	u8 ra[ETH_ALEN];
	u16 tid;
};

886 887
/* Parsed Information Elements */
struct ieee802_11_elems {
888 889 890
	u8 *ie_start;
	size_t total_len;

891 892 893 894 895 896
	/* pointers to IEs */
	u8 *ssid;
	u8 *supp_rates;
	u8 *fh_params;
	u8 *ds_params;
	u8 *cf_params;
897
	struct ieee80211_tim_ie *tim;
898 899 900 901 902 903 904 905
	u8 *ibss_params;
	u8 *challenge;
	u8 *wpa;
	u8 *rsn;
	u8 *erp_info;
	u8 *ext_supp_rates;
	u8 *wmm_info;
	u8 *wmm_param;
906
	struct ieee80211_ht_cap *ht_cap_elem;
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	struct ieee80211_ht_info *ht_info_elem;
908 909 910 911 912 913
	u8 *mesh_config;
	u8 *mesh_id;
	u8 *peer_link;
	u8 *preq;
	u8 *prep;
	u8 *perr;
914 915 916 917
	u8 *ch_switch_elem;
	u8 *country_elem;
	u8 *pwr_constr_elem;
	u8 *quiet_elem; 	/* first quite element */
918
	u8 *timeout_int;
919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940

	/* length of them, respectively */
	u8 ssid_len;
	u8 supp_rates_len;
	u8 fh_params_len;
	u8 ds_params_len;
	u8 cf_params_len;
	u8 tim_len;
	u8 ibss_params_len;
	u8 challenge_len;
	u8 wpa_len;
	u8 rsn_len;
	u8 erp_info_len;
	u8 ext_supp_rates_len;
	u8 wmm_info_len;
	u8 wmm_param_len;
	u8 mesh_config_len;
	u8 mesh_id_len;
	u8 peer_link_len;
	u8 preq_len;
	u8 prep_len;
	u8 perr_len;
941 942 943 944 945
	u8 ch_switch_elem_len;
	u8 country_elem_len;
	u8 pwr_constr_elem_len;
	u8 quiet_elem_len;
	u8 num_of_quiet_elem;	/* can be more the one */
946
	u8 timeout_int_len;
947 948
};

949 950 951 952 953 954 955 956 957 958 959 960 961
static inline struct ieee80211_local *hw_to_local(
	struct ieee80211_hw *hw)
{
	return container_of(hw, struct ieee80211_local, hw);
}

static inline struct ieee80211_hw *local_to_hw(
	struct ieee80211_local *local)
{
	return &local->hw;
}


962 963 964 965 966 967 968
static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
{
	return compare_ether_addr(raddr, addr) == 0 ||
	       is_broadcast_ether_addr(raddr);
}


969
int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
970
void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
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void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
				      u32 changed);
973
void ieee80211_configure_filter(struct ieee80211_local *local);
974
u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
975

976
/* STA code */
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void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
978 979 980 981 982
int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
		       struct cfg80211_auth_request *req);
int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
			struct cfg80211_assoc_request *req);
int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
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			 struct cfg80211_deauth_request *req,
			 void *cookie);
985
int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
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			   struct cfg80211_disassoc_request *req,
			   void *cookie);
988
ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
989
					  struct sk_buff *skb);
990 991
void ieee80211_send_pspoll(struct ieee80211_local *local,
			   struct ieee80211_sub_if_data *sdata);
992 993 994
void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
int ieee80211_max_network_latency(struct notifier_block *nb,
				  unsigned long data, void *dummy);
995 996 997
void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
				      struct ieee80211_channel_sw_ie *sw_elem,
				      struct ieee80211_bss *bss);
998 999
void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
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1001 1002 1003 1004
/* IBSS code */
void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
ieee80211_rx_result
1005
ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1006 1007
struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
					u8 *bssid, u8 *addr, u32 supp_rates);
1008 1009 1010
int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
			struct cfg80211_ibss_params *params);
int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1011 1012
void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
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/* scan/BSS handling */
1015
void ieee80211_scan_work(struct work_struct *work);
1016 1017
int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
				    const u8 *ssid, u8 ssid_len);
1018
int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1019
			   struct cfg80211_scan_request *req);
1020
void ieee80211_scan_cancel(struct ieee80211_local *local);
1021
ieee80211_rx_result
1022
ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
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1024
void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1025
struct ieee80211_bss *
1026 1027 1028 1029 1030
ieee80211_bss_info_update(struct ieee80211_local *local,
			  struct ieee80211_rx_status *rx_status,
			  struct ieee80211_mgmt *mgmt,
			  size_t len,
			  struct ieee802_11_elems *elems,
1031 1032
			  struct ieee80211_channel *channel,
			  bool beacon);
1033
struct ieee80211_bss *
1034 1035
ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
		     u8 *ssid, u8 ssid_len);
1036
void ieee80211_rx_bss_put(struct ieee80211_local *local,
1037
			  struct ieee80211_bss *bss);
1038

1039 1040
/* interface handling */
int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1041
		     struct net_device **new_dev, enum nl80211_iftype type,
1042
		     struct vif_params *params);
1043
int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1044
			     enum nl80211_iftype type);
1045
void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1046
void ieee80211_remove_interfaces(struct ieee80211_local *local);
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u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
void ieee80211_recalc_idle(struct ieee80211_local *local);
1049

1050 1051 1052 1053 1054 1055
/* tx handling */
void ieee80211_clear_tx_pending(struct ieee80211_local *local);
void ieee80211_tx_pending(unsigned long data);
int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);

1056
/* HT */
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void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
				       struct ieee80211_ht_cap *ht_cap_ie,
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				       struct ieee80211_sta_ht_cap *ht_cap);
1060
void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
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void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
			  const u8 *da, u16 tid,
			  u16 initiator, u16 reason_code);
1064 1065 1066

void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
				u16 tid, u16 initiator, u16 reason);
1067 1068
void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
				    u16 initiator, u16 reason);
1069
void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta);
1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081
void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
			     struct sta_info *sta,
			     struct ieee80211_mgmt *mgmt, size_t len);
void ieee80211_process_addba_resp(struct ieee80211_local *local,
				  struct sta_info *sta,
				  struct ieee80211_mgmt *mgmt,
				  size_t len);
void ieee80211_process_addba_request(struct ieee80211_local *local,
				     struct sta_info *sta,
				     struct ieee80211_mgmt *mgmt,
				     size_t len);

1082 1083 1084
int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
				   enum ieee80211_back_parties initiator);

1085 1086 1087 1088 1089
/* Spectrum management */
void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
				       struct ieee80211_mgmt *mgmt,
				       size_t len);

1090 1091
/* Suspend/resume and hw reconfiguration */
int ieee80211_reconfig(struct ieee80211_local *local);
1092
void ieee80211_stop_device(struct ieee80211_local *local);
1093

1094
#ifdef CONFIG_PM
1095
int __ieee80211_suspend(struct ieee80211_hw *hw);
1096 1097 1098 1099 1100

static inline int __ieee80211_resume(struct ieee80211_hw *hw)
{
	return ieee80211_reconfig(hw_to_local(hw));
}
1101 1102 1103 1104 1105
#else
static inline int __ieee80211_suspend(struct ieee80211_hw *hw)
{
	return 0;
}
1106

1107 1108 1109 1110 1111
static inline int __ieee80211_resume(struct ieee80211_hw *hw)
{
	return 0;
}
#endif
1112

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/* utility functions/constants */
extern void *mac80211_wiphy_privid; /* for wiphy privid */
1115
u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1116
			enum nl80211_iftype type);
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int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
			     int rate, int erp, int short_preamble);
1119
void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1120 1121
				     struct ieee80211_hdr *hdr, const u8 *tsc,
				     gfp_t gfp);
1122
void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
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void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
		      int encrypt);
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void ieee802_11_parse_elems(u8 *start, size_t len,
			    struct ieee802_11_elems *elems);
1127 1128 1129
u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
			       struct ieee802_11_elems *elems,
			       u64 filter, u32 crc);
1130
u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1131
			      enum ieee80211_band band);
1132

1133 1134 1135
void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
void ieee80211_dynamic_ps_timer(unsigned long data);
1136 1137 1138
void ieee80211_send_nullfunc(struct ieee80211_local *local,
			     struct ieee80211_sub_if_data *sdata,
			     int powersave);
1139 1140
void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
			     struct ieee80211_hdr *hdr);
1141
void ieee80211_beacon_loss_work(struct work_struct *work);
1142

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void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
				     enum queue_stop_reason reason);
void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
				     enum queue_stop_reason reason);
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void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
				    enum queue_stop_reason reason);
void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
				    enum queue_stop_reason reason);
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void ieee80211_add_pending_skb(struct ieee80211_local *local,
			       struct sk_buff *skb);
int ieee80211_add_pending_skbs(struct ieee80211_local *local,
			       struct sk_buff_head *skbs);
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void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
			 u16 transaction, u16 auth_alg,
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			 u8 *extra, size_t extra_len, const u8 *bssid,
			 const u8 *key, u8 key_len, u8 key_idx);
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int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
			     const u8 *ie, size_t ie_len);
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void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
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			      const u8 *ssid, size_t ssid_len,
			      const u8 *ie, size_t ie_len);
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void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
				  const size_t supp_rates_len,
				  const u8 *supp_rates);
u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
			    struct ieee802_11_elems *elems,
			    enum ieee80211_band band);

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#ifdef CONFIG_MAC80211_NOINLINE
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#define debug_noinline noinline
#else
#define debug_noinline
#endif

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#endif /* IEEE80211_I_H */