ieee80211.h

Source for the 802.11 (wireless) network stack for Linux

	u8 received_channel;
	u8 control;
	u8 mask;
	u8 freq;
	u16 len;
};

/* IEEE 802.11 requires that STA supports concurrent reception of at least
 * three fragmented frames. This define can be increased to support more
 * concurrent frames, but it should be noted that each entry can consume about
 * 2 kB of RAM and increasing cache size will slow down frame reassembly. */
#define IEEE80211_FRAG_CACHE_LEN 4

struct ieee80211_frag_entry {
	unsigned long first_frag_time;
	unsigned int seq;
	unsigned int last_frag;
	struct sk_buff *skb;
	u8 src_addr[ETH_ALEN];
	u8 dst_addr[ETH_ALEN];
};

struct ieee80211_stats {
	unsigned int tx_unicast_frames;
	unsigned int tx_multicast_frames;
	unsigned int tx_fragments;
	unsigned int tx_unicast_octets;
	unsigned int tx_multicast_octets;
	unsigned int tx_deferred_transmissions;
	unsigned int tx_single_retry_frames;
	unsigned int tx_multiple_retry_frames;
	unsigned int tx_retry_limit_exceeded;
	unsigned int tx_discards;
	unsigned int rx_unicast_frames;
	unsigned int rx_multicast_frames;
	unsigned int rx_fragments;
	unsigned int rx_unicast_octets;
	unsigned int rx_multicast_octets;
	unsigned int rx_fcs_errors;
	unsigned int rx_discards_no_buffer;
	unsigned int tx_discards_wrong_sa;
	unsigned int rx_discards_undecryptable;
	unsigned int rx_message_in_msg_fragments;
	unsigned int rx_message_in_bad_msg_fragments;
};

struct ieee80211_device;

#include "ieee80211_crypt.h"

#define SEC_KEY_1		(1<<0)
#define SEC_KEY_2		(1<<1)
#define SEC_KEY_3		(1<<2)
#define SEC_KEY_4		(1<<3)
#define SEC_ACTIVE_KEY		(1<<4)
#define SEC_AUTH_MODE		(1<<5)
#define SEC_UNICAST_GROUP	(1<<6)
#define SEC_LEVEL		(1<<7)
#define SEC_ENABLED		(1<<8)
#define SEC_ENCRYPT		(1<<9)

#define SEC_LEVEL_0		0	/* None */
#define SEC_LEVEL_1		1	/* WEP 40 and 104 bit */
#define SEC_LEVEL_2		2	/* Level 1 + TKIP */
#define SEC_LEVEL_2_CKIP	3	/* Level 1 + CKIP */
#define SEC_LEVEL_3		4	/* Level 2 + CCMP */

#define SEC_ALG_NONE		0
#define SEC_ALG_WEP		1
#define SEC_ALG_TKIP		2
#define SEC_ALG_CCMP		3

#define WEP_KEYS		4
#define WEP_KEY_LEN		13
#define SCM_KEY_LEN		32
#define SCM_TEMPORAL_KEY_LENGTH	16

struct ieee80211_security {
	u16 active_key:2,
	    enabled:1,
	    auth_mode:2, auth_algo:4, unicast_uses_group:1, encrypt:1;
	u8 encode_alg[WEP_KEYS];
	u8 key_sizes[WEP_KEYS];
	u8 keys[WEP_KEYS][SCM_KEY_LEN];
	u8 level;
	u16 flags;
} __attribute__ ((packed));

/*

 802.11 data frame from AP

      ,-------------------------------------------------------------------.
Bytes |  2   |  2   |    6    |    6    |    6    |  2   | 0..2312 |   4  |
      |------|------|---------|---------|---------|------|---------|------|
Desc. | ctrl | dura |  DA/RA  |   TA    |    SA   | Sequ |  frame  |  fcs |
      |      | tion | (BSSID) |         |         | ence |  data   |      |
      `-------------------------------------------------------------------'

Total: 28-2340 bytes

*/

#define BEACON_PROBE_SSID_ID_POSITION 12

/* Management Frame Information Element Types */
enum ieee80211_mfie {
	MFIE_TYPE_SSID = 0,
	MFIE_TYPE_RATES = 1,
	MFIE_TYPE_FH_SET = 2,
	MFIE_TYPE_DS_SET = 3,
	MFIE_TYPE_CF_SET = 4,
	MFIE_TYPE_TIM = 5,
	MFIE_TYPE_IBSS_SET = 6,
	MFIE_TYPE_COUNTRY = 7,
	MFIE_TYPE_HOP_PARAMS = 8,
	MFIE_TYPE_HOP_TABLE = 9,
	MFIE_TYPE_REQUEST = 10,
	MFIE_TYPE_CHALLENGE = 16,
	MFIE_TYPE_POWER_CONSTRAINT = 32,
	MFIE_TYPE_POWER_CAPABILITY = 33,
	MFIE_TYPE_TPC_REQUEST = 34,
	MFIE_TYPE_TPC_REPORT = 35,
	MFIE_TYPE_SUPP_CHANNELS = 36,
	MFIE_TYPE_CSA = 37,
	MFIE_TYPE_MEASURE_REQUEST = 38,
	MFIE_TYPE_MEASURE_REPORT = 39,
	MFIE_TYPE_QUIET = 40,
	MFIE_TYPE_IBSS_DFS = 41,
	MFIE_TYPE_ERP_INFO = 42,
	MFIE_TYPE_RSN = 48,
	MFIE_TYPE_RATES_EX = 50,
	MFIE_TYPE_GENERIC = 221,
	MFIE_TYPE_QOS_PARAMETER = 222,
};

/* Minimal header; can be used for passing 802.11 frames with sufficient
 * information to determine what type of underlying data type is actually
 * stored in the data. */
struct ieee80211_hdr {
	__le16 frame_ctl;
	__le16 duration_id;
	u8 payload[0];
} __attribute__ ((packed));

struct ieee80211_hdr_1addr {
	__le16 frame_ctl;
	__le16 duration_id;
	u8 addr1[ETH_ALEN];
	u8 payload[0];
} __attribute__ ((packed));

struct ieee80211_hdr_2addr {
	__le16 frame_ctl;
	__le16 duration_id;
	u8 addr1[ETH_ALEN];
	u8 addr2[ETH_ALEN];
	u8 payload[0];
} __attribute__ ((packed));

struct ieee80211_hdr_3addr {
	__le16 frame_ctl;
	__le16 duration_id;
	u8 addr1[ETH_ALEN];
	u8 addr2[ETH_ALEN];
	u8 addr3[ETH_ALEN];
	__le16 seq_ctl;
	u8 payload[0];
} __attribute__ ((packed));

struct ieee80211_hdr_4addr {
	__le16 frame_ctl;
	__le16 duration_id;
	u8 addr1[ETH_ALEN];
	u8 addr2[ETH_ALEN];
	u8 addr3[ETH_ALEN];
	__le16 seq_ctl;
	u8 addr4[ETH_ALEN];
	u8 payload[0];
} __attribute__ ((packed));

struct ieee80211_hdr_3addrqos {
	__le16 frame_ctl;
	__le16 duration_id;
	u8 addr1[ETH_ALEN];
	u8 addr2[ETH_ALEN];
	u8 addr3[ETH_ALEN];
	__le16 seq_ctl;
	u8 payload[0];
	__le16 qos_ctl;
} __attribute__ ((packed));

struct ieee80211_hdr_4addrqos {
	__le16 frame_ctl;
	__le16 duration_id;
	u8 addr1[ETH_ALEN];
	u8 addr2[ETH_ALEN];
	u8 addr3[ETH_ALEN];
	__le16 seq_ctl;
	u8 addr4[ETH_ALEN];
	u8 payload[0];
	__le16 qos_ctl;
} __attribute__ ((packed));

struct ieee80211_info_element {
	u8 id;
	u8 len;
	u8 data[0];
} __attribute__ ((packed));

/*
 * These are the data types that can make up management packets
 *
	u16 auth_algorithm;
	u16 auth_sequence;
	u16 beacon_interval;
	u16 capability;
	u8 current_ap[ETH_ALEN];
	u16 listen_interval;
	struct {
		u16 association_id:14, reserved:2;
	} __attribute__ ((packed));
	u32 time_stamp[2];
	u16 reason;
	u16 status;
*/

struct ieee80211_auth {
	struct ieee80211_hdr_3addr header;
	__le16 algorithm;
	__le16 transaction;
	__le16 status;
	/* challenge */
	struct ieee80211_info_element info_element[0];
} __attribute__ ((packed));

struct ieee80211_disassoc {
	struct ieee80211_hdr_3addr header;
	__le16 reason;
} __attribute__ ((packed));

/* Alias deauth for disassoc */
#define ieee80211_deauth ieee80211_disassoc

struct ieee80211_probe_request {
	struct ieee80211_hdr_3addr header;
	/* SSID, supported rates */
	struct ieee80211_info_element info_element[0];
} __attribute__ ((packed));

struct ieee80211_probe_response {
	struct ieee80211_hdr_3addr header;
	u32 time_stamp[2];
	__le16 beacon_interval;
	__le16 capability;
	/* SSID, supported rates, FH params, DS params,
	 * CF params, IBSS params, TIM (if beacon), RSN */
	struct ieee80211_info_element info_element[0];
} __attribute__ ((packed));

/* Alias beacon for probe_response */
#define ieee80211_beacon ieee80211_probe_response

struct ieee80211_assoc_request {
	struct ieee80211_hdr_3addr header;
	__le16 capability;
	__le16 listen_interval;
	/* SSID, supported rates, RSN */
	struct ieee80211_info_element info_element[0];
} __attribute__ ((packed));

struct ieee80211_reassoc_request {
	struct ieee80211_hdr_3addr header;
	__le16 capability;
	__le16 listen_interval;
	u8 current_ap[ETH_ALEN];
	struct ieee80211_info_element info_element[0];
} __attribute__ ((packed));

struct ieee80211_assoc_response {
	struct ieee80211_hdr_3addr header;
	__le16 capability;
	__le16 status;
	__le16 aid;
	/* supported rates */
	struct ieee80211_info_element info_element[0];
} __attribute__ ((packed));

struct ieee80211_txb {
	u8 nr_frags;
	u8 encrypted;
	u8 rts_included;
	u8 reserved;
	__le16 frag_size;
	__le16 payload_size;
	struct sk_buff *fragments[0];
};

/* SWEEP TABLE ENTRIES NUMBER */
#define MAX_SWEEP_TAB_ENTRIES		  42
#define MAX_SWEEP_TAB_ENTRIES_PER_PACKET  7
/* MAX_RATES_LENGTH needs to be 12.  The spec says 8, and many APs
 * only use 8, and then use extended rates for the remaining supported
 * rates.  Other APs, however, stick all of their supported rates on the
 * main rates information element... */
#define MAX_RATES_LENGTH                  ((u8)12)
#define MAX_RATES_EX_LENGTH               ((u8)16)
#define MAX_NETWORK_COUNT                  128

#define CRC_LENGTH                 4U

#define MAX_WPA_IE_LEN 64

#define NETWORK_EMPTY_ESSID    (1<<0)
#define NETWORK_HAS_OFDM       (1<<1)
#define NETWORK_HAS_CCK        (1<<2)

/* QoS structure */
#define NETWORK_HAS_QOS_PARAMETERS      (1<<3)
#define NETWORK_HAS_QOS_INFORMATION     (1<<4)
#define NETWORK_HAS_QOS_MASK            (NETWORK_HAS_QOS_PARAMETERS | NETWORK_HAS_QOS_INFORMATION)

#define QOS_QUEUE_NUM                   4
#define QOS_OUI_LEN                     3
#define QOS_OUI_TYPE                    2
#define QOS_ELEMENT_ID                  221
#define QOS_OUI_INFO_SUB_TYPE           0
#define QOS_OUI_PARAM_SUB_TYPE          1
#define QOS_VERSION_1                   1
#define QOS_AIFSN_MIN_VALUE             2

struct ieee80211_qos_information_element {
	u8 elementID;
	u8 length;
	u8 qui[QOS_OUI_LEN];
	u8 qui_type;
	u8 qui_subtype;
	u8 version;
	u8 ac_info;
} __attribute__ ((packed));

struct ieee80211_qos_ac_parameter {
	u8 aci_aifsn;
	u8 ecw_min_max;
	__le16 tx_op_limit;
} __attribute__ ((packed));

struct ieee80211_qos_parameter_info {
	struct ieee80211_qos_information_element info_element;
	u8 reserved;
	struct ieee80211_qos_ac_parameter ac_params_record[QOS_QUEUE_NUM];
} __attribute__ ((packed));

struct ieee80211_qos_parameters {
	__le16 cw_min[QOS_QUEUE_NUM];
	__le16 cw_max[QOS_QUEUE_NUM];
	u8 aifs[QOS_QUEUE_NUM];
	u8 flag[QOS_QUEUE_NUM];
	__le16 tx_op_limit[QOS_QUEUE_NUM];
} __attribute__ ((packed));

struct ieee80211_qos_data {
	struct ieee80211_qos_parameters parameters;
	int active;
	int supported;
	u8 param_count;
	u8 old_param_count;
};

struct ieee80211_tim_parameters {
	u8 tim_count;
	u8 tim_period;
} __attribute__ ((packed));

/*******************************************************/

struct ieee80211_network {
	/* These entries are used to identify a unique network */
	u8 bssid[ETH_ALEN];
	u8 channel;
	/* Ensure null-terminated for any debug msgs */
	u8 ssid[IW_ESSID_MAX_SIZE + 1];
	u8 ssid_len;

	struct ieee80211_qos_data qos_data;

	/* These are network statistics */
	struct ieee80211_rx_stats stats;
	u16 capability;