/*
* Copyright 2002-2005, Instant802 Networks, Inc.
* Copyright 2005, Devicescape Software, Inc.
*
* 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
/* 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 IEEE80211_MAX_SSID_LEN 32
struct ieee80211_local;
#include "ieee80211_key.h"
#include "sta_info.h"
#define BIT(x) (1 << (x))
#define IEEE80211_ALIGN32_PAD(a) ((4 - ((a) & 3)) & 3)
/* 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
#define MAC2STR(a) ((a)[0] & 0xff), ((a)[1] & 0xff), ((a)[2] & 0xff), \
((a)[3] & 0xff), ((a)[4] & 0xff), ((a)[5] & 0xff)
#define MACSTR "%02x:%02x:%02x:%02x:%02x:%02x"
#define MULTICAST_ADDR(a) ((a)[0] & 0x01)
/* 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;
struct sk_buff *skb;
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;
atomic_t users;
u8 bssid[ETH_ALEN];
u8 ssid[IEEE80211_MAX_SSID_LEN];
size_t ssid_len;
u16 capability; /* host byte order */
int hw_mode;
int channel;
int freq;
int rssi;
u8 *wpa_ie;
size_t wpa_ie_len;
u8 *rsn_ie;
size_t rsn_ie_len;
u8 *wmm_ie;
size_t wmm_ie_len;
#define IEEE80211_MAX_SUPP_RATES 32
u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
size_t supp_rates_len;
int beacon_int;
u64 timestamp;
int probe_resp;
unsigned long last_update;
};
typedef enum {
TXRX_CONTINUE, TXRX_DROP, TXRX_QUEUED
} ieee80211_txrx_result;
struct ieee80211_txrx_data {
struct sk_buff *skb;
struct net_device *dev;
struct ieee80211_local *local;
struct ieee80211_sub_if_data *sdata;
struct sta_info *sta;
u16 fc, ethertype;
struct ieee80211_key *key;
unsigned int fragmented:1; /* whether the MSDU was fragmented */
union {
struct {
struct ieee80211_tx_control *control;
int unicast:1;
int ps_buffered:1;
int short_preamble:1;
int probe_last_frag:1;
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;
int last_frag_rateidx;
int mgmt_interface;
/* Extra fragments (in addition to the first fragment
* in skb) */
int num_extra_frag;
struct sk_buff **extra_frag;
} tx;
struct {
struct ieee80211_rx_status *status;
int sent_ps_buffered;
int queue;
} rx;
} u;
#ifdef CONFIG_HOSTAPD_WPA_TESTING
int wpa_test;
#endif /* CONFIG_HOSTAPD_WPA_TESTING */
};
struct ieee80211_passive_scan {
unsigned int in_scan:1; /* this must be cleared before calling
* netif_oper(WAKEUP) */
unsigned int our_mode_only:1; /* only scan our physical mode a/b/g/etc
*/
int interval; /* time in seconds between scans */
int time; /* time in microseconds to scan for */
int channel; /* channel to be scanned */
int tries;
int mode_idx;
int chan_idx;
int freq;
int rx_packets;
int rx_beacon;
int txrx_count;
struct timer_list timer;
struct sk_buff *skb; /* skb to transmit before changing channels,
* maybe null for none */
struct ieee80211_tx_control tx_control;
unsigned int num_scans;
};
typedef ieee80211_txrx_result (*ieee80211_tx_handler)
(struct ieee80211_txrx_data *tx);
typedef ieee80211_txrx_result (*ieee80211_rx_handler)
(struct ieee80211_txrx_data *rx);
struct ieee80211_if_norm {
u8 *beacon_head, *beacon_tail;
int beacon_head_len, beacon_tail_len;
/* TODO: sta_aid could be replaced by 2008-bit large bitfield of
* that could be used in TIM element generation. This would also
* make TIM element generation a bit faster. */
/* AID mapping to station data. NULL, if AID is free. AID is in the
* range 1..2007 and sta_aid[i] corresponds to AID i+1. */
struct sta_info *sta_aid[MAX_AID_TABLE_SIZE];
int max_aid; /* largest aid currently in use */
atomic_t num_sta_ps; /* number of stations in PS mode */
struct sk_buff_head ps_bc_buf;
int dtim_period, 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 {
u8 remote_addr[ETH_ALEN];
struct sta_info *sta;
};
struct ieee80211_if_vlan {
u8 id;
};
struct ieee80211_if_sta {
enum {
IEEE80211_DISABLED, IEEE80211_AUTHENTICATE,
IEEE80211_ASSOCIATE, IEEE80211_ASSOCIATED,
IEEE80211_IBSS_SEARCH, IEEE80211_IBSS_JOINED
} state;
struct timer_list timer;
u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
u8 ssid[IEEE80211_MAX_SSID_LEN];
size_t ssid_len;
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;
int auth_tries, assoc_tries;
int ssid_set:1;
int bssid_set:1;
int prev_bssid_set:1;
int authenticated:1;
int associated:1;
int probereq_poll:1;
int use_protection:1;
int create_ibss:1;
int mixed_cell:1;
int wmm_enabled:1;
int key_mgmt;
unsigned long last_probe;
#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;
int wmm_last_param_set;
};
#define IEEE80211_SUB_IF_TYPE_NORM 0x00000000
#define IEEE80211_SUB_IF_TYPE_MGMT 0x00000001
#define IEEE80211_SUB_IF_TYPE_STA 0x00000002
#define IEEE80211_SUB_IF_TYPE_WDS 0x5A580211
#define IEEE80211_SUB_IF_TYPE_VLAN 0x00080211
struct ieee80211_sub_if_data {
struct list_head list;
unsigned int type;
struct net_device *dev;
struct net_device *master;
struct ieee80211_local *local;
struct net_device_stats stats;
int drop_unencrypted;
int eapol; /* 0 = process EAPOL frames as normal data frames,
* 1 = send EAPOL frames through wlan#ap to hostapd
* (default) */
int ieee802_1x; /* IEEE 802.1X PAE - drop packet to/from unauthorized
* port */
#define NUM_DEFAULT_KEYS 4
struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
struct ieee80211_key *default_key;
struct ieee80211_if_norm *bss; /* BSS that this device belongs to */
union {
struct ieee80211_if_norm norm;
struct ieee80211_if_wds wds;
struct ieee80211_if_vlan vlan;
struct ieee80211_if_sta sta;
} u;
int channel_use;
int channel_use_raw;
};
#define IEEE80211_DEV_TO_SUB_IF(dev) ((struct ieee80211_sub_if_data *) \
(((long)dev + sizeof(struct net_device) + 3) & ~3))
struct ieee80211_local {
struct ieee80211_hw *hw;
void *hw_priv;
struct net_device *mdev; /* wlan#.11 - "master" 802.11 device */
struct net_device *wdev; /* wlan# - default Ethernet (data) devide */
struct net_device *apdev; /* wlan#ap - management frames (hostapd) */
int open_count;
struct ieee80211_conf conf;
/* 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;
enum {
ieee80211_rx_msg = 1,
ieee80211_tx_status_msg = 2
} ieee80211_msg_enum;
spinlock_t generic_lock;
/* Station data structures */
spinlock_t sta_lock; /* mutex for STA data structures */
int num_sta; /* number of stations in sta_list */
struct list_head sta_list;
struct sta_info *sta_hash[STA_HASH_SIZE];
struct timer_list sta_cleanup;
/* Current rate table. This is a pointer to hw->modes structure. */
struct ieee80211_rate *curr_rates;
int num_curr_rates;
void *rate_ctrl_priv;
struct rate_control_ops *rate_ctrl;
int next_mode; /* MODE_IEEE80211*
* The mode preference for next channel change. This is
* used to select .11g vs. .11b channels (or 4.9 GHz vs.
* .11a) when the channel number is not unique. */
/* Supported and basic rate filters for different modes. These are
* pointers to -1 terminated lists and rates in 100 kbps units. */
int *supp_rates[NUM_IEEE80211_MODES];
int *basic_rates[NUM_IEEE80211_MODES];
int rts_threshold;
int cts_protect_erp_frames;
int fragmentation_threshold;
int short_retry_limit; /* dot11ShortRetryLimit */
int long_retry_limit; /* dot11LongRetryLimit */
int short_preamble; /* use short preamble with IEEE 802.11b */
u32 wep_iv;
int key_tx_rx_threshold; /* number of times any key can be used in TX
* or RX before generating a rekey
* notification; 0 = notification disabled. */
/* Fragment table for host-based reassembly */
struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
unsigned int fragment_next;
int bridge_packets; /* bridge packets between associated stations and
* deliver multicast frames both back to wireless
* media and to the local net stack */
struct ieee80211_passive_scan scan;
ieee80211_rx_handler *rx_handlers;
ieee80211_tx_handler *tx_handlers;
spinlock_t sub_if_lock; /* mutex for STA data structures */
struct list_head sub_if_list;
struct net_device **bss_devs; /* pointer to IF_TYPE_NORM devices for
* quick access to BSS data */
int bss_dev_count; /* number of used entries in bss_devs; note: the
* total size of bss_devs array is stored in
* conf.bss_count */
struct net_device **sta_devs; /* pointer to IF_TYPE_STA devices */
int sta_dev_count; /* number of used entries in sta_devs */
int sta_scanning;
int scan_hw_mode_idx;
int scan_channel_idx;
enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
unsigned long last_scan_completed;
struct timer_list scan_timer;
int scan_oper_channel;
int scan_oper_channel_val;
int scan_oper_power_level;
int scan_oper_freq;
int scan_oper_phymode;
int scan_oper_antenna_max;
u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
size_t scan_ssid_len;
int scan_skip_11b;
struct list_head sta_bss_list;
struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
spinlock_t sta_bss_lock;
#define IEEE80211_SCAN_MATCH_SSID BIT(0)
#define IEEE80211_SCAN_WPA_ONLY BIT(1)
#define IEEE80211_SCAN_EXTRA_INFO BIT(2)
int scan_flags;
#ifdef CONFIG_HOSTAPD_WPA_TESTING
u32 wpa_trigger;
#endif /* CONFIG_HOSTAPD_WPA_TESTING */
/* SNMP counters */
/* dot11CountersTable */
u32 dot11TransmittedFragmentCount;
u32 dot11MulticastTransmittedFrameCount;
u32 dot11FailedCount;
u32 dot11RetryCount;
u32 dot11MultipleRetryCount;
u32 dot11FrameDuplicateCount;
u32 dot11ReceivedFragmentCount;
u32 dot11MulticastReceivedFrameCount;
u32 dot11TransmittedFrameCount;
u32 dot11WEPUndecryptableCount;
int tx_led_counter;
u32 channel_use;
u32 channel_use_raw;
u32 stat_time;
struct timer_list stat_timer;
u8 bssid[ETH_ALEN]; /* BSSID for STA modes (Adhoc/Managed) */
struct timer_list rate_limit_timer;
u32 rate_limit;
u32 rate_limit_burst;
u32 rate_limit_bucket;
struct proc_dir_entry *proc, *proc_sta, *proc_iface;
struct work_struct sta_proc_add;
enum {
STA_ANTENNA_SEL_AUTO = 0,
STA_ANTENNA_SEL_SW_CTRL = 1,
STA_ANTENNA_SEL_SW_CTRL_DEBUG = 2
} sta_antenna_sel;
int rate_ctrl_num_up, rate_ctrl_num_down;
#ifdef CONFIG_IEEE80211_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_rate_limit;
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_IEEE80211_DEBUG_COUNTERS */
#define I802_DEBUG_INC(c) do { } while (0)
#endif /* CONFIG_IEEE80211_DEBUG_COUNTERS */
int default_wep_only; /* only default WEP keys are used with this
* interface; this is used to decide when hwaccel
* can be used with default keys */
int total_ps_buffered; /* total number of all buffered unicast and
* multicast packets for power saving stations
*/
int allow_broadcast_always; /* whether to allow TX of broadcast frames
* even when there are no associated STAs
*/
int wifi_wme_noack_test;
unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
unsigned int hw_modes; /* bitfield of allowed hardware modes;
* (1 << MODE_*) */
};
/* ieee80211.c */
int ieee80211_hw_config(struct net_device *dev);
struct ieee80211_key_conf *
ieee80211_key_data2conf(struct ieee80211_local *local,
struct ieee80211_key *data);
void ieee80211_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
struct ieee80211_rx_status *status, u32 msg_type);
void ieee80211_prepare_rates(struct net_device *dev);
void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx);
int ieee80211_if_add_wds(struct net_device *dev,
char *name,
struct ieee80211_if_wds *wds, int locked);
int ieee80211_if_add_vlan(struct net_device *dev, char *name,
struct ieee80211_if_vlan *vlan, int locked);
int ieee80211_if_add_norm(struct net_device *dev, char *name, u8 *bssid,
int locked);
int ieee80211_if_remove_wds(struct net_device *dev, char *name, int locked);
int ieee80211_if_remove_vlan(struct net_device *dev, char *name, int locked);
int ieee80211_if_remove_norm(struct net_device *dev, char *name, int locked);
int ieee80211_if_flush(struct net_device *dev, int locked);
int ieee80211_if_update_wds(struct net_device *dev, char *name,
struct ieee80211_if_wds *wds, int locked);
/* ieee80211_ioctl.c */
int ieee80211_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
/* Set hw encryption from ieee80211 */
int ieee80211_set_hw_encryption(struct net_device *dev,
struct sta_info *sta, u8 addr[ETH_ALEN],
struct ieee80211_key *key);
/* ieee80211_scan.c */
void ieee80211_init_scan(struct net_device *dev);
void ieee80211_stop_scan(struct net_device *dev);
/* 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.c */
int ieee80211_if_add_sta(struct net_device *dev, char *name, int locked);
int ieee80211_if_remove_sta(struct net_device *dev, char *name, int locked);
/* ieee80211_ioctl.c */
int ieee80211_set_compression(struct ieee80211_local *local,
struct net_device *dev, struct sta_info *sta);
/* ieee80211_sta.c */
void ieee80211_sta_timer(unsigned long ptr);
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);
int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len);
void 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);
#endif /* IEEE80211_I_H */