f0706e828e
Add mac80211, the IEEE 802.11 software MAC layer. Signed-off-by: Jiri Benc <jbenc@suse.cz> Signed-off-by: John W. Linville <linville@tuxdriver.com>
1045 lines
40 KiB
C
1045 lines
40 KiB
C
/*
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* Low-level hardware driver -- IEEE 802.11 driver (80211.o) interface
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* Copyright 2002-2005, Devicescape Software, Inc.
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* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef MAC80211_H
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#define MAC80211_H
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#include <linux/kernel.h>
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#include <linux/if_ether.h>
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#include <linux/skbuff.h>
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#include <linux/wireless.h>
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#include <linux/device.h>
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#include <linux/ieee80211.h>
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#include <net/wireless.h>
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#include <net/cfg80211.h>
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/* Note! Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be
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* called in hardware interrupt context. The low-level driver must not call any
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* other functions in hardware interrupt context. If there is a need for such
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* call, the low-level driver should first ACK the interrupt and perform the
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* IEEE 802.11 code call after this, e.g., from a scheduled tasklet (in
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* software interrupt context).
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*/
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/*
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* Frame format used when passing frame between low-level hardware drivers
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* and IEEE 802.11 driver the same as used in the wireless media, i.e.,
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* buffers start with IEEE 802.11 header and include the same octets that
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* are sent over air.
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*
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* If hardware uses IEEE 802.3 headers (and perform 802.3 <-> 802.11
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* conversion in firmware), upper layer 802.11 code needs to be changed to
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* support this.
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*
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* If the receive frame format is not the same as the real frame sent
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* on the wireless media (e.g., due to padding etc.), upper layer 802.11 code
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* could be updated to provide support for such format assuming this would
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* optimize the performance, e.g., by removing need to re-allocation and
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* copying of the data.
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*/
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#define IEEE80211_CHAN_W_SCAN 0x00000001
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#define IEEE80211_CHAN_W_ACTIVE_SCAN 0x00000002
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#define IEEE80211_CHAN_W_IBSS 0x00000004
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/* Channel information structure. Low-level driver is expected to fill in chan,
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* freq, and val fields. Other fields will be filled in by 80211.o based on
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* hostapd information and low-level driver does not need to use them. The
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* limits for each channel will be provided in 'struct ieee80211_conf' when
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* configuring the low-level driver with hw->config callback. If a device has
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* a default regulatory domain, IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED
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* can be set to let the driver configure all fields */
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struct ieee80211_channel {
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short chan; /* channel number (IEEE 802.11) */
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short freq; /* frequency in MHz */
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int val; /* hw specific value for the channel */
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int flag; /* flag for hostapd use (IEEE80211_CHAN_*) */
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unsigned char power_level;
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unsigned char antenna_max;
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};
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#define IEEE80211_RATE_ERP 0x00000001
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#define IEEE80211_RATE_BASIC 0x00000002
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#define IEEE80211_RATE_PREAMBLE2 0x00000004
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#define IEEE80211_RATE_SUPPORTED 0x00000010
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#define IEEE80211_RATE_OFDM 0x00000020
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#define IEEE80211_RATE_CCK 0x00000040
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#define IEEE80211_RATE_TURBO 0x00000080
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#define IEEE80211_RATE_MANDATORY 0x00000100
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#define IEEE80211_RATE_CCK_2 (IEEE80211_RATE_CCK | IEEE80211_RATE_PREAMBLE2)
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#define IEEE80211_RATE_MODULATION(f) \
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(f & (IEEE80211_RATE_CCK | IEEE80211_RATE_OFDM))
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/* Low-level driver should set PREAMBLE2, OFDM, CCK, and TURBO flags.
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* BASIC, SUPPORTED, ERP, and MANDATORY flags are set in 80211.o based on the
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* configuration. */
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struct ieee80211_rate {
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int rate; /* rate in 100 kbps */
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int val; /* hw specific value for the rate */
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int flags; /* IEEE80211_RATE_ flags */
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int val2; /* hw specific value for the rate when using short preamble
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* (only when IEEE80211_RATE_PREAMBLE2 flag is set, i.e., for
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* 2, 5.5, and 11 Mbps) */
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signed char min_rssi_ack;
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unsigned char min_rssi_ack_delta;
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/* following fields are set by 80211.o and need not be filled by the
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* low-level driver */
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int rate_inv; /* inverse of the rate (LCM(all rates) / rate) for
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* optimizing channel utilization estimates */
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};
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/* 802.11g is backwards-compatible with 802.11b, so a wlan card can
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* actually be both in 11b and 11g modes at the same time. */
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enum {
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MODE_IEEE80211A, /* IEEE 802.11a */
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MODE_IEEE80211B, /* IEEE 802.11b only */
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MODE_ATHEROS_TURBO, /* Atheros Turbo mode (2x.11a at 5 GHz) */
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MODE_IEEE80211G, /* IEEE 802.11g (and 802.11b compatibility) */
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MODE_ATHEROS_TURBOG, /* Atheros Turbo mode (2x.11g at 2.4 GHz) */
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/* keep last */
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NUM_IEEE80211_MODES
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};
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struct ieee80211_hw_mode {
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int mode; /* MODE_IEEE80211... */
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int num_channels; /* Number of channels (below) */
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struct ieee80211_channel *channels; /* Array of supported channels */
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int num_rates; /* Number of rates (below) */
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struct ieee80211_rate *rates; /* Array of supported rates */
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struct list_head list; /* Internal, don't touch */
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};
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struct ieee80211_tx_queue_params {
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int aifs; /* 0 .. 255; -1 = use default */
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int cw_min; /* 2^n-1: 1, 3, 7, .. , 1023; 0 = use default */
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int cw_max; /* 2^n-1: 1, 3, 7, .. , 1023; 0 = use default */
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int burst_time; /* maximum burst time in 0.1 ms (i.e., 10 = 1 ms);
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* 0 = disabled */
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};
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struct ieee80211_tx_queue_stats_data {
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unsigned int len; /* num packets in queue */
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unsigned int limit; /* queue len (soft) limit */
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unsigned int count; /* total num frames sent */
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};
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enum {
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IEEE80211_TX_QUEUE_DATA0,
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IEEE80211_TX_QUEUE_DATA1,
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IEEE80211_TX_QUEUE_DATA2,
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IEEE80211_TX_QUEUE_DATA3,
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IEEE80211_TX_QUEUE_DATA4,
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IEEE80211_TX_QUEUE_SVP,
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NUM_TX_DATA_QUEUES,
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/* due to stupidity in the sub-ioctl userspace interface, the items in
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* this struct need to have fixed values. As soon as it is removed, we can
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* fix these entries. */
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IEEE80211_TX_QUEUE_AFTER_BEACON = 6,
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IEEE80211_TX_QUEUE_BEACON = 7
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};
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struct ieee80211_tx_queue_stats {
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struct ieee80211_tx_queue_stats_data data[NUM_TX_DATA_QUEUES];
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};
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struct ieee80211_low_level_stats {
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unsigned int dot11ACKFailureCount;
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unsigned int dot11RTSFailureCount;
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unsigned int dot11FCSErrorCount;
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unsigned int dot11RTSSuccessCount;
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};
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/* Transmit control fields. This data structure is passed to low-level driver
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* with each TX frame. The low-level driver is responsible for configuring
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* the hardware to use given values (depending on what is supported). */
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#define HW_KEY_IDX_INVALID -1
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struct ieee80211_tx_control {
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int tx_rate; /* Transmit rate, given as the hw specific value for the
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* rate (from struct ieee80211_rate) */
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int rts_cts_rate; /* Transmit rate for RTS/CTS frame, given as the hw
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* specific value for the rate (from
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* struct ieee80211_rate) */
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#define IEEE80211_TXCTL_REQ_TX_STATUS (1<<0)/* request TX status callback for
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* this frame */
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#define IEEE80211_TXCTL_DO_NOT_ENCRYPT (1<<1) /* send this frame without
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* encryption; e.g., for EAPOL
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* frames */
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#define IEEE80211_TXCTL_USE_RTS_CTS (1<<2) /* use RTS-CTS before sending
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* frame */
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#define IEEE80211_TXCTL_USE_CTS_PROTECT (1<<3) /* use CTS protection for the
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* frame (e.g., for combined
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* 802.11g / 802.11b networks) */
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#define IEEE80211_TXCTL_NO_ACK (1<<4) /* tell the low level not to
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* wait for an ack */
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#define IEEE80211_TXCTL_RATE_CTRL_PROBE (1<<5)
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#define IEEE80211_TXCTL_CLEAR_DST_MASK (1<<6)
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#define IEEE80211_TXCTL_REQUEUE (1<<7)
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#define IEEE80211_TXCTL_FIRST_FRAGMENT (1<<8) /* this is a first fragment of
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* the frame */
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#define IEEE80211_TXCTL_TKIP_NEW_PHASE1_KEY (1<<9)
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u32 flags; /* tx control flags defined
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* above */
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u8 retry_limit; /* 1 = only first attempt, 2 = one retry, .. */
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u8 power_level; /* per-packet transmit power level, in dBm */
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u8 antenna_sel_tx; /* 0 = default/diversity, 1 = Ant0, 2 = Ant1 */
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s8 key_idx; /* -1 = do not encrypt, >= 0 keyidx from
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* hw->set_key() */
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u8 icv_len; /* length of the ICV/MIC field in octets */
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u8 iv_len; /* length of the IV field in octets */
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u8 tkip_key[16]; /* generated phase2/phase1 key for hw TKIP */
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u8 queue; /* hardware queue to use for this frame;
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* 0 = highest, hw->queues-1 = lowest */
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u8 sw_retry_attempt; /* number of times hw has tried to
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* transmit frame (not incl. hw retries) */
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struct ieee80211_rate *rate; /* internal 80211.o rate */
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struct ieee80211_rate *rts_rate; /* internal 80211.o rate
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* for RTS/CTS */
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int alt_retry_rate; /* retry rate for the last retries, given as the
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* hw specific value for the rate (from
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* struct ieee80211_rate). To be used to limit
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* packet dropping when probing higher rates, if hw
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* supports multiple retry rates. -1 = not used */
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int type; /* internal */
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int ifindex; /* internal */
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};
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/* Receive status. The low-level driver should provide this information
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* (the subset supported by hardware) to the 802.11 code with each received
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* frame. */
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struct ieee80211_rx_status {
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u64 mactime;
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int freq; /* receive frequency in Mhz */
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int channel;
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int phymode;
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int ssi;
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int signal; /* used as qual in statistics reporting */
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int noise;
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int antenna;
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int rate;
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#define RX_FLAG_MMIC_ERROR (1<<0)
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#define RX_FLAG_DECRYPTED (1<<1)
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#define RX_FLAG_RADIOTAP (1<<2)
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int flag;
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};
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/* Transmit status. The low-level driver should provide this information
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* (the subset supported by hardware) to the 802.11 code for each transmit
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* frame. */
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struct ieee80211_tx_status {
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/* copied ieee80211_tx_control structure */
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struct ieee80211_tx_control control;
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#define IEEE80211_TX_STATUS_TX_FILTERED (1<<0)
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#define IEEE80211_TX_STATUS_ACK (1<<1) /* whether the TX frame was ACKed */
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u32 flags; /* tx staus flags defined above */
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int ack_signal; /* measured signal strength of the ACK frame */
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int excessive_retries;
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int retry_count;
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int queue_length; /* information about TX queue */
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int queue_number;
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};
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/**
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* struct ieee80211_conf - configuration of the device
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*
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* This struct indicates how the driver shall configure the hardware.
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*
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* @radio_enabled: when zero, driver is required to switch off the radio.
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*/
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struct ieee80211_conf {
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int channel; /* IEEE 802.11 channel number */
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int freq; /* MHz */
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int channel_val; /* hw specific value for the channel */
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int phymode; /* MODE_IEEE80211A, .. */
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struct ieee80211_channel *chan;
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struct ieee80211_hw_mode *mode;
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unsigned int regulatory_domain;
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int radio_enabled;
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int beacon_int;
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#define IEEE80211_CONF_SHORT_SLOT_TIME (1<<0) /* use IEEE 802.11g Short Slot
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* Time */
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#define IEEE80211_CONF_SSID_HIDDEN (1<<1) /* do not broadcast the ssid */
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#define IEEE80211_CONF_RADIOTAP (1<<2) /* use radiotap if supported
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check this bit at RX time */
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u32 flags; /* configuration flags defined above */
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u8 power_level; /* transmit power limit for current
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* regulatory domain; in dBm */
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u8 antenna_max; /* maximum antenna gain */
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short tx_power_reduction; /* in 0.1 dBm */
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/* 0 = default/diversity, 1 = Ant0, 2 = Ant1 */
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u8 antenna_sel_tx;
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u8 antenna_sel_rx;
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int antenna_def;
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int antenna_mode;
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/* Following five fields are used for IEEE 802.11H */
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unsigned int radar_detect;
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unsigned int spect_mgmt;
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/* All following fields are currently unused. */
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unsigned int quiet_duration; /* duration of quiet period */
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unsigned int quiet_offset; /* how far into the beacon is the quiet
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* period */
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unsigned int quiet_period;
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u8 radar_firpwr_threshold;
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u8 radar_rssi_threshold;
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u8 pulse_height_threshold;
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u8 pulse_rssi_threshold;
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u8 pulse_inband_threshold;
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};
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/**
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* enum ieee80211_if_types - types of 802.11 network interfaces
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*
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* @IEEE80211_IF_TYPE_AP: interface in AP mode.
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* @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap
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* daemon. Drivers should never see this type.
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* @IEEE80211_IF_TYPE_STA: interface in STA (client) mode.
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* @IEEE80211_IF_TYPE_IBSS: interface in IBSS (ad-hoc) mode.
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* @IEEE80211_IF_TYPE_MNTR: interface in monitor (rfmon) mode.
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* @IEEE80211_IF_TYPE_WDS: interface in WDS mode.
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* @IEEE80211_IF_TYPE_VLAN: not used.
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*/
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enum ieee80211_if_types {
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IEEE80211_IF_TYPE_AP = 0x00000000,
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IEEE80211_IF_TYPE_MGMT = 0x00000001,
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IEEE80211_IF_TYPE_STA = 0x00000002,
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IEEE80211_IF_TYPE_IBSS = 0x00000003,
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IEEE80211_IF_TYPE_MNTR = 0x00000004,
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IEEE80211_IF_TYPE_WDS = 0x5A580211,
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IEEE80211_IF_TYPE_VLAN = 0x00080211,
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};
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/**
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* struct ieee80211_if_init_conf - initial configuration of an interface
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*
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* @if_id: internal interface ID. This number has no particular meaning to
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* drivers and the only allowed usage is to pass it to
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* ieee80211_beacon_get() and ieee80211_get_buffered_bc() functions.
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* This field is not valid for monitor interfaces
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* (interfaces of %IEEE80211_IF_TYPE_MNTR type).
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* @type: one of &enum ieee80211_if_types constants. Determines the type of
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* added/removed interface.
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* @mac_addr: pointer to MAC address of the interface. This pointer is valid
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* until the interface is removed (i.e. it cannot be used after
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* remove_interface() callback was called for this interface).
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*
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* This structure is used in add_interface() and remove_interface()
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* callbacks of &struct ieee80211_hw.
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*/
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struct ieee80211_if_init_conf {
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int if_id;
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int type;
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void *mac_addr;
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};
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/**
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* struct ieee80211_if_conf - configuration of an interface
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*
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* @type: type of the interface. This is always the same as was specified in
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* &struct ieee80211_if_init_conf. The type of an interface never changes
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* during the life of the interface; this field is present only for
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* convenience.
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* @bssid: BSSID of the network we are associated to/creating.
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* @ssid: used (together with @ssid_len) by drivers for hardware that
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* generate beacons independently. The pointer is valid only during the
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* config_interface() call, so copy the value somewhere if you need
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* it.
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* @ssid_len: length of the @ssid field.
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* @generic_elem: used (together with @generic_elem_len) by drivers for
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* hardware that generate beacons independently. The pointer is valid
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* only during the config_interface() call, so copy the value somewhere
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* if you need it.
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* @generic_elem_len: length of the generic element.
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* @beacon: beacon template. Valid only if @host_gen_beacon_template in
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* &struct ieee80211_hw is set. The driver is responsible of freeing
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* the sk_buff.
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* @beacon_control: tx_control for the beacon template, this field is only
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* valid when the @beacon field was set.
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*
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* This structure is passed to the config_interface() callback of
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* &struct ieee80211_hw.
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*/
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struct ieee80211_if_conf {
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int type;
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u8 *bssid;
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u8 *ssid;
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size_t ssid_len;
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u8 *generic_elem;
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size_t generic_elem_len;
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struct sk_buff *beacon;
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struct ieee80211_tx_control *beacon_control;
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};
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typedef enum { ALG_NONE, ALG_WEP, ALG_TKIP, ALG_CCMP, ALG_NULL }
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ieee80211_key_alg;
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struct ieee80211_key_conf {
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int hw_key_idx; /* filled + used by low-level driver */
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ieee80211_key_alg alg;
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int keylen;
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#define IEEE80211_KEY_FORCE_SW_ENCRYPT (1<<0) /* to be cleared by low-level
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driver */
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#define IEEE80211_KEY_DEFAULT_TX_KEY (1<<1) /* This key is the new default TX
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key (used only for broadcast
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keys). */
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#define IEEE80211_KEY_DEFAULT_WEP_ONLY (1<<2) /* static WEP is the only
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configured security policy;
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this allows some low-level
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drivers to determine when
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hwaccel can be used */
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u32 flags; /* key configuration flags defined above */
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s8 keyidx; /* WEP key index */
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u8 key[0];
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};
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#define IEEE80211_SEQ_COUNTER_RX 0
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#define IEEE80211_SEQ_COUNTER_TX 1
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typedef enum {
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SET_KEY, DISABLE_KEY, REMOVE_ALL_KEYS,
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} set_key_cmd;
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/* This is driver-visible part of the per-hw state the stack keeps. */
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struct ieee80211_hw {
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/* points to the cfg80211 wiphy for this piece. Note
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* that you must fill in the perm_addr and dev fields
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* of this structure, use the macros provided below. */
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struct wiphy *wiphy;
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/* assigned by mac80211, don't write */
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struct ieee80211_conf conf;
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/* Single thread workqueue available for driver use
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* Allocated by mac80211 on registration */
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struct workqueue_struct *workqueue;
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/* Pointer to the private area that was
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* allocated with this struct for you. */
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void *priv;
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/* The rest is information about your hardware */
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/* TODO: frame_type 802.11/802.3, sw_encryption requirements */
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/* Some wireless LAN chipsets generate beacons in the hardware/firmware
|
|
* and others rely on host generated beacons. This option is used to
|
|
* configure the upper layer IEEE 802.11 module to generate beacons.
|
|
* The low-level driver can use ieee80211_beacon_get() to fetch the
|
|
* next beacon frame. */
|
|
#define IEEE80211_HW_HOST_GEN_BEACON (1<<0)
|
|
|
|
/* The device needs to be supplied with a beacon template only. */
|
|
#define IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE (1<<1)
|
|
|
|
/* Some devices handle decryption internally and do not
|
|
* indicate whether the frame was encrypted (unencrypted frames
|
|
* will be dropped by the hardware, unless specifically allowed
|
|
* through) */
|
|
#define IEEE80211_HW_DEVICE_HIDES_WEP (1<<2)
|
|
|
|
/* Whether RX frames passed to ieee80211_rx() include FCS in the end */
|
|
#define IEEE80211_HW_RX_INCLUDES_FCS (1<<3)
|
|
|
|
/* Some wireless LAN chipsets buffer broadcast/multicast frames for
|
|
* power saving stations in the hardware/firmware and others rely on
|
|
* the host system for such buffering. This option is used to
|
|
* configure the IEEE 802.11 upper layer to buffer broadcast/multicast
|
|
* frames when there are power saving stations so that low-level driver
|
|
* can fetch them with ieee80211_get_buffered_bc(). */
|
|
#define IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING (1<<4)
|
|
|
|
#define IEEE80211_HW_WEP_INCLUDE_IV (1<<5)
|
|
|
|
/* will data nullfunc frames get proper TX status callback */
|
|
#define IEEE80211_HW_DATA_NULLFUNC_ACK (1<<6)
|
|
|
|
/* Force software encryption for TKIP packets if WMM is enabled. */
|
|
#define IEEE80211_HW_NO_TKIP_WMM_HWACCEL (1<<7)
|
|
|
|
/* Some devices handle Michael MIC internally and do not include MIC in
|
|
* the received packets passed up. device_strips_mic must be set
|
|
* for such devices. The 'encryption' frame control bit is expected to
|
|
* be still set in the IEEE 802.11 header with this option unlike with
|
|
* the device_hides_wep configuration option.
|
|
*/
|
|
#define IEEE80211_HW_DEVICE_STRIPS_MIC (1<<8)
|
|
|
|
/* Device is capable of performing full monitor mode even during
|
|
* normal operation. */
|
|
#define IEEE80211_HW_MONITOR_DURING_OPER (1<<9)
|
|
|
|
/* Device does not need BSSID filter set to broadcast in order to
|
|
* receive all probe responses while scanning */
|
|
#define IEEE80211_HW_NO_PROBE_FILTERING (1<<10)
|
|
|
|
/* Channels are already configured to the default regulatory domain
|
|
* specified in the device's EEPROM */
|
|
#define IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED (1<<11)
|
|
|
|
/* calculate Michael MIC for an MSDU when doing hwcrypto */
|
|
#define IEEE80211_HW_TKIP_INCLUDE_MMIC (1<<12)
|
|
/* Do TKIP phase1 key mixing in stack to support cards only do
|
|
* phase2 key mixing when doing hwcrypto */
|
|
#define IEEE80211_HW_TKIP_REQ_PHASE1_KEY (1<<13)
|
|
/* Do TKIP phase1 and phase2 key mixing in stack and send the generated
|
|
* per-packet RC4 key with each TX frame when doing hwcrypto */
|
|
#define IEEE80211_HW_TKIP_REQ_PHASE2_KEY (1<<14)
|
|
|
|
u32 flags; /* hardware flags defined above */
|
|
|
|
/* Set to the size of a needed device specific skb headroom for TX skbs. */
|
|
unsigned int extra_tx_headroom;
|
|
|
|
/* This is the time in us to change channels
|
|
*/
|
|
int channel_change_time;
|
|
/* Maximum values for various statistics.
|
|
* Leave at 0 to indicate no support. Use negative numbers for dBm. */
|
|
s8 max_rssi;
|
|
s8 max_signal;
|
|
s8 max_noise;
|
|
|
|
/* Number of available hardware TX queues for data packets.
|
|
* WMM requires at least four queues. */
|
|
int queues;
|
|
};
|
|
|
|
static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev)
|
|
{
|
|
set_wiphy_dev(hw->wiphy, dev);
|
|
}
|
|
|
|
static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr)
|
|
{
|
|
memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN);
|
|
}
|
|
|
|
/* Configuration block used by the low-level driver to tell the 802.11 code
|
|
* about supported hardware features and to pass function pointers to callback
|
|
* functions. */
|
|
struct ieee80211_ops {
|
|
/* Handler that 802.11 module calls for each transmitted frame.
|
|
* skb contains the buffer starting from the IEEE 802.11 header.
|
|
* The low-level driver should send the frame out based on
|
|
* configuration in the TX control data.
|
|
* Must be atomic. */
|
|
int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb,
|
|
struct ieee80211_tx_control *control);
|
|
|
|
/* Handler for performing hardware reset. */
|
|
int (*reset)(struct ieee80211_hw *hw);
|
|
|
|
/* Handler that is called when any netdevice attached to the hardware
|
|
* device is set UP for the first time. This can be used, e.g., to
|
|
* enable interrupts and beacon sending. */
|
|
int (*open)(struct ieee80211_hw *hw);
|
|
|
|
/* Handler that is called when the last netdevice attached to the
|
|
* hardware device is set DOWN. This can be used, e.g., to disable
|
|
* interrupts and beacon sending. */
|
|
int (*stop)(struct ieee80211_hw *hw);
|
|
|
|
/* Handler for asking a driver if a new interface can be added (or,
|
|
* more exactly, set UP). If the handler returns zero, the interface
|
|
* is added. Driver should perform any initialization it needs prior
|
|
* to returning zero. By returning non-zero addition of the interface
|
|
* is inhibited. Unless monitor_during_oper is set, it is guaranteed
|
|
* that monitor interfaces and normal interfaces are mutually
|
|
* exclusive. The open() handler is called after add_interface()
|
|
* if this is the first device added. At least one of the open()
|
|
* open() and add_interface() callbacks has to be assigned. If
|
|
* add_interface() is NULL, one STA interface is permitted only. */
|
|
int (*add_interface)(struct ieee80211_hw *hw,
|
|
struct ieee80211_if_init_conf *conf);
|
|
|
|
/* Notify a driver that an interface is going down. The stop() handler
|
|
* is called prior to this if this is a last interface. */
|
|
void (*remove_interface)(struct ieee80211_hw *hw,
|
|
struct ieee80211_if_init_conf *conf);
|
|
|
|
/* Handler for configuration requests. IEEE 802.11 code calls this
|
|
* function to change hardware configuration, e.g., channel. */
|
|
int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
|
|
|
|
/* Handler for configuration requests related to interfaces (e.g.
|
|
* BSSID). */
|
|
int (*config_interface)(struct ieee80211_hw *hw,
|
|
int if_id, struct ieee80211_if_conf *conf);
|
|
|
|
/* ieee80211 drivers do not have access to the &struct net_device
|
|
* that is (are) connected with their device. Hence (and because
|
|
* we need to combine the multicast lists and flags for multiple
|
|
* virtual interfaces), they cannot assign set_multicast_list.
|
|
* The parameters here replace dev->flags and dev->mc_count,
|
|
* dev->mc_list is replaced by calling ieee80211_get_mc_list_item.
|
|
* Must be atomic. */
|
|
void (*set_multicast_list)(struct ieee80211_hw *hw,
|
|
unsigned short flags, int mc_count);
|
|
|
|
/* Set TIM bit handler. If the hardware/firmware takes care of beacon
|
|
* generation, IEEE 802.11 code uses this function to tell the
|
|
* low-level to set (or clear if set==0) TIM bit for the given aid. If
|
|
* host system is used to generate beacons, this handler is not used
|
|
* and low-level driver should set it to NULL.
|
|
* Must be atomic. */
|
|
int (*set_tim)(struct ieee80211_hw *hw, int aid, int set);
|
|
|
|
/* Set encryption key. IEEE 802.11 module calls this function to set
|
|
* encryption keys. addr is ff:ff:ff:ff:ff:ff for default keys and
|
|
* station hwaddr for individual keys. aid of the station is given
|
|
* to help low-level driver in selecting which key->hw_key_idx to use
|
|
* for this key. TX control data will use the hw_key_idx selected by
|
|
* the low-level driver.
|
|
* Must be atomic. */
|
|
int (*set_key)(struct ieee80211_hw *hw, set_key_cmd cmd,
|
|
u8 *addr, struct ieee80211_key_conf *key, int aid);
|
|
|
|
/* Set TX key index for default/broadcast keys. This is needed in cases
|
|
* where wlan card is doing full WEP/TKIP encapsulation (wep_include_iv
|
|
* is not set), in other cases, this function pointer can be set to
|
|
* NULL since the IEEE 802. 11 module takes care of selecting the key
|
|
* index for each TX frame. */
|
|
int (*set_key_idx)(struct ieee80211_hw *hw, int idx);
|
|
|
|
/* Enable/disable IEEE 802.1X. This item requests wlan card to pass
|
|
* unencrypted EAPOL-Key frames even when encryption is configured.
|
|
* If the wlan card does not require such a configuration, this
|
|
* function pointer can be set to NULL. */
|
|
int (*set_ieee8021x)(struct ieee80211_hw *hw, int use_ieee8021x);
|
|
|
|
/* Set port authorization state (IEEE 802.1X PAE) to be authorized
|
|
* (authorized=1) or unauthorized (authorized=0). This function can be
|
|
* used if the wlan hardware or low-level driver implements PAE.
|
|
* 80211.o module will anyway filter frames based on authorization
|
|
* state, so this function pointer can be NULL if low-level driver does
|
|
* not require event notification about port state changes.
|
|
* Currently unused. */
|
|
int (*set_port_auth)(struct ieee80211_hw *hw, u8 *addr,
|
|
int authorized);
|
|
|
|
/* Ask the hardware to service the scan request, no need to start
|
|
* the scan state machine in stack. */
|
|
int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len);
|
|
|
|
/* return low-level statistics */
|
|
int (*get_stats)(struct ieee80211_hw *hw,
|
|
struct ieee80211_low_level_stats *stats);
|
|
|
|
/* For devices that generate their own beacons and probe response
|
|
* or association responses this updates the state of privacy_invoked
|
|
* returns 0 for success or an error number */
|
|
int (*set_privacy_invoked)(struct ieee80211_hw *hw,
|
|
int privacy_invoked);
|
|
|
|
/* For devices that have internal sequence counters, allow 802.11
|
|
* code to access the current value of a counter */
|
|
int (*get_sequence_counter)(struct ieee80211_hw *hw,
|
|
u8* addr, u8 keyidx, u8 txrx,
|
|
u32* iv32, u16* iv16);
|
|
|
|
/* Configuration of RTS threshold (if device needs it) */
|
|
int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value);
|
|
|
|
/* Configuration of fragmentation threshold.
|
|
* Assign this if the device does fragmentation by itself,
|
|
* if this method is assigned then the stack will not do
|
|
* fragmentation. */
|
|
int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value);
|
|
|
|
/* Configuration of retry limits (if device needs it) */
|
|
int (*set_retry_limit)(struct ieee80211_hw *hw,
|
|
u32 short_retry, u32 long_retr);
|
|
|
|
/* Number of STAs in STA table notification (NULL = disabled).
|
|
* Must be atomic. */
|
|
void (*sta_table_notification)(struct ieee80211_hw *hw,
|
|
int num_sta);
|
|
|
|
/* Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
|
|
* bursting) for a hardware TX queue.
|
|
* queue = IEEE80211_TX_QUEUE_*.
|
|
* Must be atomic. */
|
|
int (*conf_tx)(struct ieee80211_hw *hw, int queue,
|
|
const struct ieee80211_tx_queue_params *params);
|
|
|
|
/* Get statistics of the current TX queue status. This is used to get
|
|
* number of currently queued packets (queue length), maximum queue
|
|
* size (limit), and total number of packets sent using each TX queue
|
|
* (count).
|
|
* Currently unused. */
|
|
int (*get_tx_stats)(struct ieee80211_hw *hw,
|
|
struct ieee80211_tx_queue_stats *stats);
|
|
|
|
/* Get the current TSF timer value from firmware/hardware. Currently,
|
|
* this is only used for IBSS mode debugging and, as such, is not a
|
|
* required function.
|
|
* Must be atomic. */
|
|
u64 (*get_tsf)(struct ieee80211_hw *hw);
|
|
|
|
/* Reset the TSF timer and allow firmware/hardware to synchronize with
|
|
* other STAs in the IBSS. This is only used in IBSS mode. This
|
|
* function is optional if the firmware/hardware takes full care of
|
|
* TSF synchronization. */
|
|
void (*reset_tsf)(struct ieee80211_hw *hw);
|
|
|
|
/* Setup beacon data for IBSS beacons. Unlike access point (Master),
|
|
* IBSS uses a fixed beacon frame which is configured using this
|
|
* function. This handler is required only for IBSS mode. */
|
|
int (*beacon_update)(struct ieee80211_hw *hw,
|
|
struct sk_buff *skb,
|
|
struct ieee80211_tx_control *control);
|
|
|
|
/* Determine whether the last IBSS beacon was sent by us. This is
|
|
* needed only for IBSS mode and the result of this function is used to
|
|
* determine whether to reply to Probe Requests. */
|
|
int (*tx_last_beacon)(struct ieee80211_hw *hw);
|
|
};
|
|
|
|
/* Allocate a new hardware device. This must be called once for each
|
|
* hardware device. The returned pointer must be used to refer to this
|
|
* device when calling other functions. 802.11 code allocates a private data
|
|
* area for the low-level driver. The size of this area is given as
|
|
* priv_data_len.
|
|
*/
|
|
struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
|
|
const struct ieee80211_ops *ops);
|
|
|
|
/* Register hardware device to the IEEE 802.11 code and kernel. Low-level
|
|
* drivers must call this function before using any other IEEE 802.11
|
|
* function except ieee80211_register_hwmode. */
|
|
int ieee80211_register_hw(struct ieee80211_hw *hw);
|
|
|
|
/* driver can use this and ieee80211_get_rx_led_name to get the
|
|
* name of the registered LEDs after ieee80211_register_hw
|
|
* was called.
|
|
* This is useful to set the default trigger on the LED class
|
|
* device that your driver should export for each LED the device
|
|
* has, that way the default behaviour will be as expected but
|
|
* the user can still change it/turn off the LED etc.
|
|
*/
|
|
#ifdef CONFIG_MAC80211_LEDS
|
|
extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw);
|
|
extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw);
|
|
#endif
|
|
static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw)
|
|
{
|
|
#ifdef CONFIG_MAC80211_LEDS
|
|
return __ieee80211_get_tx_led_name(hw);
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw)
|
|
{
|
|
#ifdef CONFIG_MAC80211_LEDS
|
|
return __ieee80211_get_rx_led_name(hw);
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
/* Register a new hardware PHYMODE capability to the stack. */
|
|
int ieee80211_register_hwmode(struct ieee80211_hw *hw,
|
|
struct ieee80211_hw_mode *mode);
|
|
|
|
/* Unregister a hardware device. This function instructs 802.11 code to free
|
|
* allocated resources and unregister netdevices from the kernel. */
|
|
void ieee80211_unregister_hw(struct ieee80211_hw *hw);
|
|
|
|
/* Free everything that was allocated including private data of a driver. */
|
|
void ieee80211_free_hw(struct ieee80211_hw *hw);
|
|
|
|
/* Receive frame callback function. The low-level driver uses this function to
|
|
* send received frames to the IEEE 802.11 code. Receive buffer (skb) must
|
|
* start with IEEE 802.11 header. */
|
|
void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
|
|
struct ieee80211_rx_status *status);
|
|
void ieee80211_rx_irqsafe(struct ieee80211_hw *hw,
|
|
struct sk_buff *skb,
|
|
struct ieee80211_rx_status *status);
|
|
|
|
/* Transmit status callback function. The low-level driver must call this
|
|
* function to report transmit status for all the TX frames that had
|
|
* req_tx_status set in the transmit control fields. In addition, this should
|
|
* be called at least for all unicast frames to provide information for TX rate
|
|
* control algorithm. In order to maintain all statistics, this function is
|
|
* recommended to be called after each frame, including multicast/broadcast, is
|
|
* sent. */
|
|
void ieee80211_tx_status(struct ieee80211_hw *hw,
|
|
struct sk_buff *skb,
|
|
struct ieee80211_tx_status *status);
|
|
void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
|
|
struct sk_buff *skb,
|
|
struct ieee80211_tx_status *status);
|
|
|
|
/**
|
|
* ieee80211_beacon_get - beacon generation function
|
|
* @hw: pointer obtained from ieee80211_alloc_hw().
|
|
* @if_id: interface ID from &struct ieee80211_if_init_conf.
|
|
* @control: will be filled with information needed to send this beacon.
|
|
*
|
|
* If the beacon frames are generated by the host system (i.e., not in
|
|
* hardware/firmware), the low-level driver uses this function to receive
|
|
* the next beacon frame from the 802.11 code. The low-level is responsible
|
|
* for calling this function before beacon data is needed (e.g., based on
|
|
* hardware interrupt). Returned skb is used only once and low-level driver
|
|
* is responsible of freeing it.
|
|
*/
|
|
struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
|
|
int if_id,
|
|
struct ieee80211_tx_control *control);
|
|
|
|
/**
|
|
* ieee80211_rts_get - RTS frame generation function
|
|
* @hw: pointer obtained from ieee80211_alloc_hw().
|
|
* @frame: pointer to the frame that is going to be protected by the RTS.
|
|
* @frame_len: the frame length (in octets).
|
|
* @frame_txctl: &struct ieee80211_tx_control of the frame.
|
|
* @rts: The buffer where to store the RTS frame.
|
|
*
|
|
* If the RTS frames are generated by the host system (i.e., not in
|
|
* hardware/firmware), the low-level driver uses this function to receive
|
|
* the next RTS frame from the 802.11 code. The low-level is responsible
|
|
* for calling this function before and RTS frame is needed.
|
|
*/
|
|
void ieee80211_rts_get(struct ieee80211_hw *hw,
|
|
const void *frame, size_t frame_len,
|
|
const struct ieee80211_tx_control *frame_txctl,
|
|
struct ieee80211_rts *rts);
|
|
|
|
/**
|
|
* ieee80211_rts_duration - Get the duration field for an RTS frame
|
|
* @hw: pointer obtained from ieee80211_alloc_hw().
|
|
* @frame_len: the length of the frame that is going to be protected by the RTS.
|
|
* @frame_txctl: &struct ieee80211_tx_control of the frame.
|
|
*
|
|
* If the RTS is generated in firmware, but the host system must provide
|
|
* the duration field, the low-level driver uses this function to receive
|
|
* the duration field value in little-endian byteorder.
|
|
*/
|
|
__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
|
|
size_t frame_len,
|
|
const struct ieee80211_tx_control *frame_txctl);
|
|
|
|
/**
|
|
* ieee80211_ctstoself_get - CTS-to-self frame generation function
|
|
* @hw: pointer obtained from ieee80211_alloc_hw().
|
|
* @frame: pointer to the frame that is going to be protected by the CTS-to-self.
|
|
* @frame_len: the frame length (in octets).
|
|
* @frame_txctl: &struct ieee80211_tx_control of the frame.
|
|
* @cts: The buffer where to store the CTS-to-self frame.
|
|
*
|
|
* If the CTS-to-self frames are generated by the host system (i.e., not in
|
|
* hardware/firmware), the low-level driver uses this function to receive
|
|
* the next CTS-to-self frame from the 802.11 code. The low-level is responsible
|
|
* for calling this function before and CTS-to-self frame is needed.
|
|
*/
|
|
void ieee80211_ctstoself_get(struct ieee80211_hw *hw,
|
|
const void *frame, size_t frame_len,
|
|
const struct ieee80211_tx_control *frame_txctl,
|
|
struct ieee80211_cts *cts);
|
|
|
|
/**
|
|
* ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame
|
|
* @hw: pointer obtained from ieee80211_alloc_hw().
|
|
* @frame_len: the length of the frame that is going to be protected by the CTS-to-self.
|
|
* @frame_txctl: &struct ieee80211_tx_control of the frame.
|
|
*
|
|
* If the CTS-to-self is generated in firmware, but the host system must provide
|
|
* the duration field, the low-level driver uses this function to receive
|
|
* the duration field value in little-endian byteorder.
|
|
*/
|
|
__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
|
|
size_t frame_len,
|
|
const struct ieee80211_tx_control *frame_txctl);
|
|
|
|
/**
|
|
* ieee80211_generic_frame_duration - Calculate the duration field for a frame
|
|
* @hw: pointer obtained from ieee80211_alloc_hw().
|
|
* @frame_len: the length of the frame.
|
|
* @rate: the rate (in 100kbps) at which the frame is going to be transmitted.
|
|
*
|
|
* Calculate the duration field of some generic frame, given its
|
|
* length and transmission rate (in 100kbps).
|
|
*/
|
|
__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
|
|
size_t frame_len,
|
|
int rate);
|
|
|
|
/**
|
|
* ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
* @if_id: interface ID from &struct ieee80211_if_init_conf.
|
|
* @control: will be filled with information needed to send returned frame.
|
|
*
|
|
* Function for accessing buffered broadcast and multicast frames. If
|
|
* hardware/firmware does not implement buffering of broadcast/multicast
|
|
* frames when power saving is used, 802.11 code buffers them in the host
|
|
* memory. The low-level driver uses this function to fetch next buffered
|
|
* frame. In most cases, this is used when generating beacon frame. This
|
|
* function returns a pointer to the next buffered skb or NULL if no more
|
|
* buffered frames are available.
|
|
*
|
|
* Note: buffered frames are returned only after DTIM beacon frame was
|
|
* generated with ieee80211_beacon_get() and the low-level driver must thus
|
|
* call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns
|
|
* NULL if the previous generated beacon was not DTIM, so the low-level driver
|
|
* does not need to check for DTIM beacons separately and should be able to
|
|
* use common code for all beacons.
|
|
*/
|
|
struct sk_buff *
|
|
ieee80211_get_buffered_bc(struct ieee80211_hw *hw, int if_id,
|
|
struct ieee80211_tx_control *control);
|
|
|
|
/* Low level drivers that have their own MLME and MAC indicate
|
|
* the aid for an associating station with this call */
|
|
int ieee80211_set_aid_for_sta(struct ieee80211_hw *hw,
|
|
u8 *peer_address, u16 aid);
|
|
|
|
|
|
/* Given an sk_buff with a raw 802.11 header at the data pointer this function
|
|
* returns the 802.11 header length in bytes (not including encryption
|
|
* headers). If the data in the sk_buff is too short to contain a valid 802.11
|
|
* header the function returns 0.
|
|
*/
|
|
int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb);
|
|
|
|
/* Like ieee80211_get_hdrlen_from_skb() but takes a FC in CPU order. */
|
|
int ieee80211_get_hdrlen(u16 fc);
|
|
|
|
/**
|
|
* ieee80211_wake_queue - wake specific queue
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
* @queue: queue number (counted from zero).
|
|
*
|
|
* Drivers should use this function instead of netif_wake_queue.
|
|
*/
|
|
void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue);
|
|
|
|
/**
|
|
* ieee80211_stop_queue - stop specific queue
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
* @queue: queue number (counted from zero).
|
|
*
|
|
* Drivers should use this function instead of netif_stop_queue.
|
|
*/
|
|
void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue);
|
|
|
|
/**
|
|
* ieee80211_start_queues - start all queues
|
|
* @hw: pointer to as obtained from ieee80211_alloc_hw().
|
|
*
|
|
* Drivers should use this function instead of netif_start_queue.
|
|
*/
|
|
void ieee80211_start_queues(struct ieee80211_hw *hw);
|
|
|
|
/**
|
|
* ieee80211_stop_queues - stop all queues
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
*
|
|
* Drivers should use this function instead of netif_stop_queue.
|
|
*/
|
|
void ieee80211_stop_queues(struct ieee80211_hw *hw);
|
|
|
|
/**
|
|
* ieee80211_wake_queues - wake all queues
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
*
|
|
* Drivers should use this function instead of netif_wake_queue.
|
|
*/
|
|
void ieee80211_wake_queues(struct ieee80211_hw *hw);
|
|
|
|
/**
|
|
* ieee80211_get_mc_list_item - iteration over items in multicast list
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
* @prev: value returned by previous call to ieee80211_get_mc_list_item() or
|
|
* NULL to start a new iteration.
|
|
* @ptr: pointer to buffer of void * type for internal usage of
|
|
* ieee80211_get_mc_list_item().
|
|
*
|
|
* Iterates over items in multicast list of given device. To get the first
|
|
* item, pass NULL in @prev and in *@ptr. In subsequent calls, pass the
|
|
* value returned by previous call in @prev. Don't alter *@ptr during
|
|
* iteration. When there are no more items, NULL is returned.
|
|
*/
|
|
struct dev_mc_list *
|
|
ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
|
|
struct dev_mc_list *prev,
|
|
void **ptr);
|
|
|
|
/* called by driver to notify scan status completed */
|
|
void ieee80211_scan_completed(struct ieee80211_hw *hw);
|
|
|
|
/* Function to indicate Radar Detection. The low level driver must call this
|
|
* function to indicate the presence of radar in the current channel.
|
|
* Additionally the radar type also could be sent */
|
|
int ieee80211_radar_status(struct ieee80211_hw *hw, int channel,
|
|
int radar, int radar_type);
|
|
|
|
/* return a pointer to the source address (SA) */
|
|
static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr)
|
|
{
|
|
u8 *raw = (u8 *) hdr;
|
|
u8 tofrom = (*(raw+1)) & 3; /* get the TODS and FROMDS bits */
|
|
|
|
switch (tofrom) {
|
|
case 2:
|
|
return hdr->addr3;
|
|
case 3:
|
|
return hdr->addr4;
|
|
}
|
|
return hdr->addr2;
|
|
}
|
|
|
|
/* return a pointer to the destination address (DA) */
|
|
static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr)
|
|
{
|
|
u8 *raw = (u8 *) hdr;
|
|
u8 to_ds = (*(raw+1)) & 1; /* get the TODS bit */
|
|
|
|
if (to_ds)
|
|
return hdr->addr3;
|
|
return hdr->addr1;
|
|
}
|
|
|
|
static inline int ieee80211_get_morefrag(struct ieee80211_hdr *hdr)
|
|
{
|
|
return (le16_to_cpu(hdr->frame_control) &
|
|
IEEE80211_FCTL_MOREFRAGS) != 0;
|
|
}
|
|
|
|
#define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x"
|
|
#define MAC_ARG(x) ((u8*)(x))[0], ((u8*)(x))[1], ((u8*)(x))[2], \
|
|
((u8*)(x))[3], ((u8*)(x))[4], ((u8*)(x))[5]
|
|
|
|
#endif /* MAC80211_H */
|