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linux/net/mac80211/ieee80211_i.h
Johannes Berg 30b89b0f5e mac80211: rework scanning to account for probe response/beacon difference 
This patch reworks the scanning code (ieee80211_rx_bss_info) to take
more parameters from beacons and keep a BSS info structure alive when
only beacons for it are received. This fixes a problem with iwlwifi
drivers (where we don't understand the root cause of the problem yet)
and another driver for some broken hardware (which cannot send probe
requests unless associated, so can't always actively scan.)

Signed-off-by: Bill Moss <bmoss@clemson.edu>
[jmberg: reformatted comments, make probe_resp a bool]
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-16 16:00:03 -04:00

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/*
* Copyright 2002-2005, Instant802 Networks, Inc.
* Copyright 2005, Devicescape Software, Inc.
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
*
* 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>
#include <linux/etherdevice.h>
#include <net/wireless.h>
#include "key.h"
#include "sta_info.h"
/* ieee80211.o internal definitions, etc. These are not included into
* low-level drivers. */
#ifndef ETH_P_PAE
#define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
#endif /* ETH_P_PAE */
#define WLAN_FC_DATA_PRESENT(fc) (((fc) & 0x4c) == 0x08)
#define IEEE80211_FC(type, subtype) cpu_to_le16(type | subtype)
struct ieee80211_local;
/* 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
#define IEEE80211_ENCRYPT_TAILROOM 12
/* 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
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 */
};
struct ieee80211_sta_bss {
struct list_head list;
struct ieee80211_sta_bss *hnext;
size_t ssid_len;
atomic_t users;
u8 bssid[ETH_ALEN];
u8 ssid[IEEE80211_MAX_SSID_LEN];
u16 capability; /* host byte order */
enum ieee80211_band band;
int freq;
int rssi, signal, noise;
u8 *wpa_ie;
size_t wpa_ie_len;
u8 *rsn_ie;
size_t rsn_ie_len;
u8 *wmm_ie;
size_t wmm_ie_len;
u8 *ht_ie;
size_t ht_ie_len;
#ifdef CONFIG_MAC80211_MESH
u8 *mesh_id;
size_t mesh_id_len;
u8 *mesh_cfg;
#endif
#define IEEE80211_MAX_SUPP_RATES 32
u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
size_t supp_rates_len;
u64 timestamp;
int beacon_int;
bool probe_resp;
unsigned long last_update;
/* during assocation, we save an ERP value from a probe response so
* that we can feed ERP info to the driver when handling the
* association completes. these fields probably won't be up-to-date
* otherwise, you probably don't want to use them. */
int has_erp_value;
u8 erp_value;
};
static inline u8 *bss_mesh_cfg(struct ieee80211_sta_bss *bss)
{
#ifdef CONFIG_MAC80211_MESH
return bss->mesh_cfg;
#endif
return NULL;
}
static inline u8 *bss_mesh_id(struct ieee80211_sta_bss *bss)
{
#ifdef CONFIG_MAC80211_MESH
return bss->mesh_id;
#endif
return NULL;
}
static inline u8 bss_mesh_id_len(struct ieee80211_sta_bss *bss)
{
#ifdef CONFIG_MAC80211_MESH
return bss->mesh_id_len;
#endif
return 0;
}
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)
#define IEEE80211_TX_FRAGMENTED BIT(0)
#define IEEE80211_TX_UNICAST BIT(1)
#define IEEE80211_TX_PS_BUFFERED BIT(2)
#define IEEE80211_TX_PROBE_LAST_FRAG BIT(3)
#define IEEE80211_TX_INJECTED BIT(4)
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_tx_control *control;
struct ieee80211_channel *channel;
struct ieee80211_rate *rate;
/* use this rate (if set) for last fragment; rate can
* be set to lower rate for the first fragments, e.g.,
* when using CTS protection with IEEE 802.11g. */
struct ieee80211_rate *last_frag_rate;
/* Extra fragments (in addition to the first fragment
* in skb) */
struct sk_buff **extra_frag;
int num_extra_frag;
u16 fc, ethertype;
unsigned int flags;
};
typedef unsigned __bitwise__ ieee80211_rx_result;
#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)
#define IEEE80211_RX_IN_SCAN BIT(0)
/* frame is destined to interface currently processed (incl. multicast frames) */
#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 {
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_rx_status *status;
struct ieee80211_rate *rate;
u16 fc, ethertype;
unsigned int flags;
int sent_ps_buffered;
int queue;
int load;
u32 tkip_iv32;
u16 tkip_iv16;
};
/* flags used in struct ieee80211_tx_packet_data.flags */
#define IEEE80211_TXPD_REQ_TX_STATUS BIT(0)
#define IEEE80211_TXPD_DO_NOT_ENCRYPT BIT(1)
#define IEEE80211_TXPD_REQUEUE BIT(2)
#define IEEE80211_TXPD_EAPOL_FRAME BIT(3)
#define IEEE80211_TXPD_AMPDU BIT(4)
/* Stored in sk_buff->cb */
struct ieee80211_tx_packet_data {
int ifindex;
unsigned long jiffies;
unsigned int flags;
u8 queue;
};
struct ieee80211_tx_stored_packet {
struct ieee80211_tx_control control;
struct sk_buff *skb;
struct sk_buff **extra_frag;
struct ieee80211_rate *last_frag_rate;
int num_extra_frag;
unsigned int last_frag_rate_ctrl_probe;
};
struct beacon_data {
u8 *head, *tail;
int head_len, tail_len;
int dtim_period;
};
struct ieee80211_if_ap {
struct beacon_data *beacon;
struct list_head vlans;
u8 ssid[IEEE80211_MAX_SSID_LEN];
size_t ssid_len;
/* yes, this looks ugly, but guarantees that we can later use
* bitmap_empty :)
* NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
struct sk_buff_head ps_bc_buf;
atomic_t num_sta_ps; /* number of stations in PS mode */
int dtim_count;
int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
int max_ratectrl_rateidx; /* max TX rateidx for rate control */
int num_beacons; /* number of TXed beacon frames for this BSS */
};
struct ieee80211_if_wds {
struct sta_info *sta;
u8 remote_addr[ETH_ALEN];
};
struct ieee80211_if_vlan {
struct ieee80211_sub_if_data *ap;
struct list_head list;
};
struct mesh_stats {
__u32 fwded_frames; /* Mesh forwarded frames */
__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;
};
struct mesh_config {
/* Timeouts in ms */
/* Mesh plink management parameters */
u16 dot11MeshRetryTimeout;
u16 dot11MeshConfirmTimeout;
u16 dot11MeshHoldingTimeout;
u16 dot11MeshMaxPeerLinks;
u8 dot11MeshMaxRetries;
u8 dot11MeshTTL;
bool auto_open_plinks;
/* HWMP parameters */
u8 dot11MeshHWMPmaxPREQretries;
u32 path_refresh_time;
u16 min_discovery_timeout;
u32 dot11MeshHWMPactivePathTimeout;
u16 dot11MeshHWMPpreqMinInterval;
u16 dot11MeshHWMPnetDiameterTraversalTime;
};
/* flags used in struct ieee80211_if_sta.flags */
#define IEEE80211_STA_SSID_SET BIT(0)
#define IEEE80211_STA_BSSID_SET BIT(1)
#define IEEE80211_STA_PREV_BSSID_SET BIT(2)
#define IEEE80211_STA_AUTHENTICATED BIT(3)
#define IEEE80211_STA_ASSOCIATED BIT(4)
#define IEEE80211_STA_PROBEREQ_POLL BIT(5)
#define IEEE80211_STA_CREATE_IBSS BIT(6)
#define IEEE80211_STA_MIXED_CELL BIT(7)
#define IEEE80211_STA_WMM_ENABLED BIT(8)
#define IEEE80211_STA_AUTO_SSID_SEL BIT(10)
#define IEEE80211_STA_AUTO_BSSID_SEL BIT(11)
#define IEEE80211_STA_AUTO_CHANNEL_SEL BIT(12)
#define IEEE80211_STA_PRIVACY_INVOKED BIT(13)
struct ieee80211_if_sta {
struct timer_list timer;
struct work_struct work;
u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
u8 ssid[IEEE80211_MAX_SSID_LEN];
enum {
IEEE80211_DISABLED, IEEE80211_AUTHENTICATE,
IEEE80211_ASSOCIATE, IEEE80211_ASSOCIATED,
IEEE80211_IBSS_SEARCH, IEEE80211_IBSS_JOINED,
IEEE80211_MESH_UP
} state;
size_t ssid_len;
u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
size_t scan_ssid_len;
#ifdef CONFIG_MAC80211_MESH
struct timer_list mesh_path_timer;
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];
/* 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;
u8 mesh_seqnum[3];
bool accepting_plinks;
#endif
u16 aid;
u16 ap_capab, capab;
u8 *extra_ie; /* to be added to the end of AssocReq */
size_t extra_ie_len;
/* The last AssocReq/Resp IEs */
u8 *assocreq_ies, *assocresp_ies;
size_t assocreq_ies_len, assocresp_ies_len;
struct sk_buff_head skb_queue;
int auth_tries, assoc_tries;
unsigned long request;
unsigned long last_probe;
unsigned int flags;
#define IEEE80211_STA_REQ_SCAN 0
#define IEEE80211_STA_REQ_AUTH 1
#define IEEE80211_STA_REQ_RUN 2
#define IEEE80211_AUTH_ALG_OPEN BIT(0)
#define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
#define IEEE80211_AUTH_ALG_LEAP BIT(2)
unsigned int auth_algs; /* bitfield of allowed auth algs */
int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
int auth_transaction;
unsigned long ibss_join_req;
struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
u32 supp_rates_bits[IEEE80211_NUM_BANDS];
int wmm_last_param_set;
int num_beacons; /* number of TXed beacon frames by this STA */
};
static inline void ieee80211_if_sta_set_mesh_id(struct ieee80211_if_sta *ifsta,
u8 mesh_id_len, u8 *mesh_id)
{
#ifdef CONFIG_MAC80211_MESH
ifsta->mesh_id_len = mesh_id_len;
memcpy(ifsta->mesh_id, mesh_id, mesh_id_len);
#endif
}
#ifdef CONFIG_MAC80211_MESH
#define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
do { (sta)->mshstats.name++; } while (0)
#else
#define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
do { } while (0)
#endif
/* flags used in struct ieee80211_sub_if_data.flags */
#define IEEE80211_SDATA_ALLMULTI BIT(0)
#define IEEE80211_SDATA_PROMISC BIT(1)
#define IEEE80211_SDATA_USERSPACE_MLME BIT(2)
#define IEEE80211_SDATA_OPERATING_GMODE BIT(3)
struct ieee80211_sub_if_data {
struct list_head list;
struct wireless_dev wdev;
/* keys */
struct list_head key_list;
struct net_device *dev;
struct ieee80211_local *local;
unsigned int flags;
int drop_unencrypted;
/*
* basic rates of this AP or the AP we're associated to
*/
u64 basic_rates;
u16 sequence;
/* Fragment table for host-based reassembly */
struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
unsigned int fragment_next;
#define NUM_DEFAULT_KEYS 4
struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
struct ieee80211_key *default_key;
/*
* BSS configuration for this interface.
*
* FIXME: I feel bad putting this here when we already have a
* bss pointer, but the bss pointer is just wrong when
* you have multiple virtual STA mode interfaces...
* This needs to be fixed.
*/
struct ieee80211_bss_conf bss_conf;
struct ieee80211_if_ap *bss; /* BSS that this device belongs to */
union {
struct ieee80211_if_ap ap;
struct ieee80211_if_wds wds;
struct ieee80211_if_vlan vlan;
struct ieee80211_if_sta sta;
u32 mntr_flags;
} u;
int channel_use;
int channel_use_raw;
#ifdef CONFIG_MAC80211_DEBUGFS
struct dentry *debugfsdir;
union {
struct {
struct dentry *channel_use;
struct dentry *drop_unencrypted;
struct dentry *state;
struct dentry *bssid;
struct dentry *prev_bssid;
struct dentry *ssid_len;
struct dentry *aid;
struct dentry *ap_capab;
struct dentry *capab;
struct dentry *extra_ie_len;
struct dentry *auth_tries;
struct dentry *assoc_tries;
struct dentry *auth_algs;
struct dentry *auth_alg;
struct dentry *auth_transaction;
struct dentry *flags;
struct dentry *num_beacons_sta;
} sta;
struct {
struct dentry *channel_use;
struct dentry *drop_unencrypted;
struct dentry *num_sta_ps;
struct dentry *dtim_count;
struct dentry *num_beacons;
struct dentry *force_unicast_rateidx;
struct dentry *max_ratectrl_rateidx;
struct dentry *num_buffered_multicast;
} ap;
struct {
struct dentry *channel_use;
struct dentry *drop_unencrypted;
struct dentry *peer;
} wds;
struct {
struct dentry *channel_use;
struct dentry *drop_unencrypted;
} vlan;
struct {
struct dentry *mode;
} monitor;
struct dentry *default_key;
} debugfs;
#ifdef CONFIG_MAC80211_MESH
struct dentry *mesh_stats_dir;
struct {
struct dentry *fwded_frames;
struct dentry *dropped_frames_ttl;
struct dentry *dropped_frames_no_route;
struct dentry *estab_plinks;
struct timer_list mesh_path_timer;
} 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
#endif
/* must be last, dynamically sized area in this! */
struct ieee80211_vif vif;
};
static inline
struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
{
return container_of(p, struct ieee80211_sub_if_data, vif);
}
#define IEEE80211_DEV_TO_SUB_IF(dev) netdev_priv(dev)
enum {
IEEE80211_RX_MSG = 1,
IEEE80211_TX_STATUS_MSG = 2,
IEEE80211_DELBA_MSG = 3,
IEEE80211_ADDBA_MSG = 4,
};
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;
struct net_device *mdev; /* wmaster# - "master" 802.11 device */
int open_count;
int monitors, cooked_mntrs;
/* number of interfaces with corresponding FIF_ flags */
int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
unsigned int filter_flags; /* FIF_* */
struct iw_statistics wstats;
u8 wstats_flags;
bool tim_in_locked_section; /* see ieee80211_beacon_get() */
int tx_headroom; /* required headroom for hardware/radiotap */
enum {
IEEE80211_DEV_UNINITIALIZED = 0,
IEEE80211_DEV_REGISTERED,
IEEE80211_DEV_UNREGISTERED,
} reg_state;
/* 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;
/* Station data */
/*
* The lock only protects the list, hash, timer and counter
* against manipulation, reads are done in RCU. Additionally,
* the lock protects each BSS's TIM bitmap.
*/
spinlock_t sta_lock;
unsigned long num_sta;
struct list_head sta_list;
struct list_head sta_flush_list;
struct work_struct sta_flush_work;
struct sta_info *sta_hash[STA_HASH_SIZE];
struct timer_list sta_cleanup;
unsigned long state[NUM_TX_DATA_QUEUES_AMPDU];
struct ieee80211_tx_stored_packet pending_packet[NUM_TX_DATA_QUEUES_AMPDU];
struct tasklet_struct tx_pending_tasklet;
/* number of interfaces with corresponding IFF_ flags */
atomic_t iff_allmultis, iff_promiscs;
struct rate_control_ref *rate_ctrl;
int rts_threshold;
int fragmentation_threshold;
int short_retry_limit; /* dot11ShortRetryLimit */
int long_retry_limit; /* dot11LongRetryLimit */
struct crypto_blkcipher *wep_tx_tfm;
struct crypto_blkcipher *wep_rx_tfm;
u32 wep_iv;
int bridge_packets; /* bridge packets between associated stations and
* deliver multicast frames both back to wireless
* media and to the local net stack */
struct list_head interfaces;
/*
* Key lock, protects sdata's key_list and sta_info's
* key pointers (write access, they're RCU.)
*/
spinlock_t key_lock;
bool sta_sw_scanning;
bool sta_hw_scanning;
int scan_channel_idx;
enum ieee80211_band scan_band;
enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
unsigned long last_scan_completed;
struct delayed_work scan_work;
struct net_device *scan_dev;
struct ieee80211_channel *oper_channel, *scan_channel;
u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
size_t scan_ssid_len;
struct list_head sta_bss_list;
struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
spinlock_t sta_bss_lock;
/* SNMP counters */
/* dot11CountersTable */
u32 dot11TransmittedFragmentCount;
u32 dot11MulticastTransmittedFrameCount;
u32 dot11FailedCount;
u32 dot11RetryCount;
u32 dot11MultipleRetryCount;
u32 dot11FrameDuplicateCount;
u32 dot11ReceivedFragmentCount;
u32 dot11MulticastReceivedFrameCount;
u32 dot11TransmittedFrameCount;
u32 dot11WEPUndecryptableCount;
#ifdef CONFIG_MAC80211_LEDS
int tx_led_counter, rx_led_counter;
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];
#endif
u32 channel_use;
u32 channel_use_raw;
#ifdef CONFIG_MAC80211_DEBUGFS
struct work_struct sta_debugfs_add;
#endif
#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;
unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
#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)) */
#ifdef CONFIG_MAC80211_DEBUGFS
struct local_debugfsdentries {
struct dentry *frequency;
struct dentry *antenna_sel_tx;
struct dentry *antenna_sel_rx;
struct dentry *bridge_packets;
struct dentry *rts_threshold;
struct dentry *fragmentation_threshold;
struct dentry *short_retry_limit;
struct dentry *long_retry_limit;
struct dentry *total_ps_buffered;
struct dentry *wep_iv;
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;
struct dentry *wme_tx_queue;
struct dentry *wme_rx_queue;
#endif
struct dentry *dot11ACKFailureCount;
struct dentry *dot11RTSFailureCount;
struct dentry *dot11FCSErrorCount;
struct dentry *dot11RTSSuccessCount;
} stats;
struct dentry *stations;
struct dentry *keys;
} debugfs;
#endif
};
/* this struct represents 802.11n's RA/TID combination */
struct ieee80211_ra_tid {
u8 ra[ETH_ALEN];
u16 tid;
};
/* Parsed Information Elements */
struct ieee802_11_elems {
/* pointers to IEs */
u8 *ssid;
u8 *supp_rates;
u8 *fh_params;
u8 *ds_params;
u8 *cf_params;
u8 *tim;
u8 *ibss_params;
u8 *challenge;
u8 *wpa;
u8 *rsn;
u8 *erp_info;
u8 *ext_supp_rates;
u8 *wmm_info;
u8 *wmm_param;
u8 *ht_cap_elem;
u8 *ht_info_elem;
u8 *mesh_config;
u8 *mesh_id;
u8 *peer_link;
u8 *preq;
u8 *prep;
u8 *perr;
/* 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 ht_cap_elem_len;
u8 ht_info_elem_len;
u8 mesh_config_len;
u8 mesh_id_len;
u8 peer_link_len;
u8 preq_len;
u8 prep_len;
u8 perr_len;
};
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;
}
enum ieee80211_link_state_t {
IEEE80211_LINK_STATE_XOFF = 0,
IEEE80211_LINK_STATE_PENDING,
};
struct sta_attribute {
struct attribute attr;
ssize_t (*show)(const struct sta_info *, char *buf);
ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
};
static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
{
return compare_ether_addr(raddr, addr) == 0 ||
is_broadcast_ether_addr(raddr);
}
/* ieee80211.c */
int ieee80211_hw_config(struct ieee80211_local *local);
int ieee80211_if_config(struct net_device *dev);
int ieee80211_if_config_beacon(struct net_device *dev);
void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
void ieee80211_if_setup(struct net_device *dev);
u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
struct ieee80211_ht_info *req_ht_cap,
struct ieee80211_ht_bss_info *req_bss_cap);
/* ieee80211_ioctl.c */
extern const struct iw_handler_def ieee80211_iw_handler_def;
/* Least common multiple of the used rates (in 100 kbps). This is used to
* calculate rate_inv values for each rate so that only integers are needed. */
#define CHAN_UTIL_RATE_LCM 95040
/* 1 usec is 1/8 * (95040/10) = 1188 */
#define CHAN_UTIL_PER_USEC 1188
/* Amount of bits to shift the result right to scale the total utilization
* to values that will not wrap around 32-bit integers. */
#define CHAN_UTIL_SHIFT 9
/* Theoretical maximum of channel utilization counter in 10 ms (stat_time=1):
* (CHAN_UTIL_PER_USEC * 10000) >> CHAN_UTIL_SHIFT = 23203. So dividing the
* raw value with about 23 should give utilization in 10th of a percentage
* (1/1000). However, utilization is only estimated and not all intervals
* between frames etc. are calculated. 18 seems to give numbers that are closer
* to the real maximum. */
#define CHAN_UTIL_PER_10MS 18
#define CHAN_UTIL_HDR_LONG (202 * CHAN_UTIL_PER_USEC)
#define CHAN_UTIL_HDR_SHORT (40 * CHAN_UTIL_PER_USEC)
/* ieee80211_ioctl.c */
int ieee80211_set_freq(struct ieee80211_local *local, int freq);
/* ieee80211_sta.c */
void ieee80211_sta_timer(unsigned long data);
void ieee80211_sta_work(struct work_struct *work);
void ieee80211_sta_scan_work(struct work_struct *work);
void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
struct ieee80211_rx_status *rx_status);
int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len);
int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len);
int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid);
int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len);
void ieee80211_sta_req_auth(struct net_device *dev,
struct ieee80211_if_sta *ifsta);
int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len);
ieee80211_rx_result ieee80211_sta_rx_scan(
struct net_device *dev, struct sk_buff *skb,
struct ieee80211_rx_status *rx_status);
void ieee80211_rx_bss_list_init(struct net_device *dev);
void ieee80211_rx_bss_list_deinit(struct net_device *dev);
int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len);
struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
struct sk_buff *skb, u8 *bssid,
u8 *addr);
int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason);
int ieee80211_sta_disassociate(struct net_device *dev, u16 reason);
void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
u32 changed);
void ieee80211_reset_erp_info(struct net_device *dev);
int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
struct ieee80211_ht_info *ht_info);
int ieee80211_ht_addt_info_ie_to_ht_bss_info(
struct ieee80211_ht_addt_info *ht_add_info_ie,
struct ieee80211_ht_bss_info *bss_info);
void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
u16 tid, u8 dialog_token, u16 start_seq_num,
u16 agg_size, u16 timeout);
void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
u16 initiator, u16 reason_code);
void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *da,
u16 tid, u16 initiator, u16 reason);
void sta_rx_agg_session_timer_expired(unsigned long data);
void sta_addba_resp_timer_expired(unsigned long data);
void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr);
u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
struct ieee802_11_elems *elems,
enum ieee80211_band band);
void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
int encrypt);
void ieee802_11_parse_elems(u8 *start, size_t len,
struct ieee802_11_elems *elems);
#ifdef CONFIG_MAC80211_MESH
void ieee80211_start_mesh(struct net_device *dev);
#else
static inline void ieee80211_start_mesh(struct net_device *dev)
{}
#endif
/* ieee80211_iface.c */
int ieee80211_if_add(struct net_device *dev, const char *name,
struct net_device **new_dev, int type,
struct vif_params *params);
void ieee80211_if_set_type(struct net_device *dev, int type);
void ieee80211_if_reinit(struct net_device *dev);
void __ieee80211_if_del(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata);
int ieee80211_if_remove(struct net_device *dev, const char *name, int id);
void ieee80211_if_free(struct net_device *dev);
void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata);
/* tx handling */
void ieee80211_clear_tx_pending(struct ieee80211_local *local);
void ieee80211_tx_pending(unsigned long data);
int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
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);
/* utility functions/constants */
extern void *mac80211_wiphy_privid; /* for wiphy privid */
extern const unsigned char rfc1042_header[6];
extern const unsigned char bridge_tunnel_header[6];
u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
enum ieee80211_if_types type);
int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
int rate, int erp, int short_preamble);
void mac80211_ev_michael_mic_failure(struct net_device *dev, int keyidx,
struct ieee80211_hdr *hdr);
#endif /* IEEE80211_I_H */
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