8f20fc2498
This patch embeds the struct ieee80211_key_conf into struct ieee80211_key
and thus avoids allocations and having data present twice.
This required some more changes:
1) The removal of the IEEE80211_KEY_DEFAULT_TX_KEY key flag.
This flag isn't used by drivers nor should it be since
we have a set_key_idx() callback. Maybe that callback needs
to be extended to include the key conf, but only a driver that
requires it will tell.
2) The removal of the IEEE80211_KEY_DEFAULT_WEP_ONLY key flag.
This flag is global, so it shouldn't be passed in the key
conf structure. Pass it to the function instead.
Also, this patch removes the AID parameter to the set_key() callback
because it is currently unused and the hardware currently cannot know
about the AID anyway. I suspect this was used with some hardware that
actually selected the AID itself, but that functionality was removed.
Additionally, I've removed the ALG_NULL key algorithm since we have
ALG_NONE.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Michael Wu <flamingice@sourmilk.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1061 lines
40 KiB
C
1061 lines
40 KiB
C
/*
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* mac80211 <-> driver interface
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*
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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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* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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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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#define IEEE80211_TXCTL_LONG_RETRY_LIMIT (1<<10) /* this frame should be send
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* using the through
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* set_retry_limit configured
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* long retry value */
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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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* This could be used when set_retry_limit
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* is not implemented by the driver */
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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; /* HW_KEY_IDX_INVALID = do not encrypt,
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* other values: keyidx from 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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/* 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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};
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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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* This pointer will be %NULL for monitor interfaces, be careful.
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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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* When you allow multiple interfaces to be added to your PHY, take care
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* that the hardware can actually handle multiple MAC addresses. However,
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* also take care that when there's no interface left with mac_addr != %NULL
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* you remove the MAC address from the device to avoid acknowledging packets
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* in pure monitor mode.
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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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|
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typedef enum {
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ALG_NONE,
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ALG_WEP,
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ALG_TKIP,
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ALG_CCMP,
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} ieee80211_key_alg;
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struct ieee80211_key_conf {
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/* shall be changed by the driver to anything but HW_KEY_IDX_INVALID */
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int hw_key_idx;
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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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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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|
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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
|
|
* Allocated by mac80211 on registration */
|
|
struct workqueue_struct *workqueue;
|
|
|
|
/* Pointer to the private area that was
|
|
* allocated with this struct for you. */
|
|
void *priv;
|
|
|
|
/* The rest is information about your hardware */
|
|
|
|
/* TODO: frame_type 802.11/802.3, sw_encryption requirements */
|
|
|
|
/* hole at 0 */
|
|
|
|
/*
|
|
* The device only needs to be supplied with a beacon template.
|
|
* If you need the host to generate each beacon then don't use
|
|
* this flag and use ieee80211_beacon_get().
|
|
*/
|
|
#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.)
|
|
* It is permissible to not handle all encrypted frames and fall
|
|
* back to software encryption; however, if this flag is set
|
|
* unencrypted frames must be dropped unless the driver is told
|
|
* otherwise via the set_ieee8021x() callback.
|
|
*/
|
|
#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)
|
|
|
|
/*
|
|
* This flag is only relevant if hardware encryption is used.
|
|
* If set, it has two meanings:
|
|
* 1) the IV and ICV are present in received frames that have
|
|
* been decrypted (unless IEEE80211_HW_DEVICE_HIDES_WEP is
|
|
* also set)
|
|
* 2) on transmission, the IV should be generated in software.
|
|
*
|
|
* Please let us know if you *don't* use this flag, the stack would
|
|
* really like to be able to get the IV to keep key statistics
|
|
* accurate.
|
|
*/
|
|
#define IEEE80211_HW_WEP_INCLUDE_IV (1<<5)
|
|
|
|
/* hole at 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. This flag 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
|
|
* IEEE80211_HW_DEVICE_HIDES_WEP flag.
|
|
*/
|
|
#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 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. If assigned, the open() handler is called after
|
|
* add_interface() if this is the first device added. The
|
|
* add_interface() callback has to be assigned because it is the only
|
|
* way to obtain the requested MAC address for any interface.
|
|
*/
|
|
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.
|
|
*
|
|
* This is called to enable hardware acceleration of encryption and
|
|
* decryption. The address will be the broadcast address for default
|
|
* keys and the other station's hardware address for individual keys.
|
|
* When transmitting, the TX control data will use the hw_key_idx
|
|
* selected by the low-level driver.
|
|
*/
|
|
int (*set_key)(struct ieee80211_hw *hw, set_key_cmd cmd,
|
|
u8 *address, struct ieee80211_key_conf *key,
|
|
int static_wep_only);
|
|
|
|
/*
|
|
* 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);
|
|
|
|
/* Handle ERP IE change notifications. Must be atomic. */
|
|
void (*erp_ie_changed)(struct ieee80211_hw *hw, u8 changes,
|
|
int cts_protection, int preamble);
|
|
|
|
/* Flags for the erp_ie_changed changes parameter */
|
|
#define IEEE80211_ERP_CHANGE_PROTECTION (1<<0) /* protection flag changed */
|
|
#define IEEE80211_ERP_CHANGE_PREAMBLE (1<<1) /* barker preamble mode changed */
|
|
|
|
/* 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().
|
|
* @if_id: interface ID from &struct ieee80211_if_init_conf.
|
|
* @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, int if_id,
|
|
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().
|
|
* @if_id: interface ID from &struct ieee80211_if_init_conf.
|
|
* @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, int if_id,
|
|
size_t frame_len,
|
|
const struct ieee80211_tx_control *frame_txctl);
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|
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/**
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* ieee80211_ctstoself_get - CTS-to-self frame generation function
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* @hw: pointer obtained from ieee80211_alloc_hw().
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* @if_id: interface ID from &struct ieee80211_if_init_conf.
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* @frame: pointer to the frame that is going to be protected by the CTS-to-self.
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* @frame_len: the frame length (in octets).
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* @frame_txctl: &struct ieee80211_tx_control of the frame.
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* @cts: The buffer where to store the CTS-to-self frame.
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|
*
|
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* 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
|
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* the next CTS-to-self frame from the 802.11 code. The low-level is responsible
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* for calling this function before and CTS-to-self frame is needed.
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|
*/
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void ieee80211_ctstoself_get(struct ieee80211_hw *hw, int if_id,
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const void *frame, size_t frame_len,
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const struct ieee80211_tx_control *frame_txctl,
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struct ieee80211_cts *cts);
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/**
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* ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame
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* @hw: pointer obtained from ieee80211_alloc_hw().
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* @if_id: interface ID from &struct ieee80211_if_init_conf.
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* @frame_len: the length of the frame that is going to be protected by the CTS-to-self.
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|
* @frame_txctl: &struct ieee80211_tx_control of the frame.
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|
*
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* 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.
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|
*/
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__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, int if_id,
|
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size_t frame_len,
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const struct ieee80211_tx_control *frame_txctl);
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|
|
|
/**
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|
* ieee80211_generic_frame_duration - Calculate the duration field for a frame
|
|
* @hw: pointer obtained from ieee80211_alloc_hw().
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|
* @if_id: interface ID from &struct ieee80211_if_init_conf.
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|
* @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
|
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* length and transmission rate (in 100kbps).
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|
*/
|
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__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, int if_id,
|
|
size_t frame_len,
|
|
int rate);
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|
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/**
|
|
* ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
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|
* @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
|
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* hardware/firmware does not implement buffering of broadcast/multicast
|
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* 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
|
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* 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);
|
|
|
|
/* 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);
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|
|
|
/* Like ieee80211_get_hdrlen_from_skb() but takes a FC in CPU order. */
|
|
int ieee80211_get_hdrlen(u16 fc);
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|
|
/**
|
|
* 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);
|
|
|
|
/* 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 */
|