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1425 lines
51 KiB
1425 lines
51 KiB
/*
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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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/**
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* DOC: Introduction
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*
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* mac80211 is the Linux stack for 802.11 hardware that implements
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* only partial functionality in hard- or firmware. This document
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* defines the interface between mac80211 and low-level hardware
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* drivers.
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*/
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/**
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* DOC: Calling mac80211 from interrupts
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*
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* 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 workqueue function.
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*/
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/**
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* DOC: Warning
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*
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* If you're reading this document and not the header file itself, it will
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* be incomplete because not all documentation has been converted yet.
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*/
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/**
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* DOC: Frame format
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*
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* As a general rule, when frames are passed between mac80211 and the driver,
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* they start with the IEEE 802.11 header and include the same octets that are
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* sent over the air except for the FCS which should be calculated by the
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* hardware.
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*
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* There are, however, various exceptions to this rule for advanced features:
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*
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* The first exception is for hardware encryption and decryption offload
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* where the IV/ICV may or may not be generated in hardware.
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*
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* Secondly, when the hardware handles fragmentation, the frame handed to
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* the driver from mac80211 is the MSDU, not the MPDU.
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*
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* Finally, for received frames, the driver is able to indicate that it has
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* filled a radiotap header and put that in front of the frame; if it does
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* not do so then mac80211 may add this under certain circumstances.
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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_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 and CCK 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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/**
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* enum ieee80211_phymode - PHY modes
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*
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* @MODE_IEEE80211A: 5GHz as defined by 802.11a/802.11h
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* @MODE_IEEE80211B: 2.4 GHz as defined by 802.11b
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* @MODE_IEEE80211G: 2.4 GHz as defined by 802.11g (with OFDM),
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* backwards compatible with 11b mode
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* @NUM_IEEE80211_MODES: internal
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*/
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enum ieee80211_phymode {
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MODE_IEEE80211A,
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MODE_IEEE80211B,
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MODE_IEEE80211G,
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/* keep last */
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NUM_IEEE80211_MODES
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};
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/**
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* struct ieee80211_hw_mode - PHY mode definition
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*
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* This structure describes the capabilities supported by the device
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* in a single PHY mode.
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*
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* @mode: the PHY mode for this definition
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* @num_channels: number of supported channels
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* @channels: pointer to array of supported channels
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* @num_rates: number of supported bitrates
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* @rates: pointer to array of supported bitrates
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* @list: internal
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*/
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struct ieee80211_hw_mode {
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struct list_head list;
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struct ieee80211_channel *channels;
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struct ieee80211_rate *rates;
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enum ieee80211_phymode mode;
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int num_channels;
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int num_rates;
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};
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/**
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* struct ieee80211_tx_queue_params - transmit queue configuration
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*
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* The information provided in this structure is required for QoS
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* transmit queue configuration.
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*
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* @aifs: arbitration interface space [0..255, -1: use default]
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* @cw_min: minimum contention window [will be a value of the form
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* 2^n-1 in the range 1..1023; 0: use default]
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* @cw_max: maximum contention window [like @cw_min]
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* @burst_time: maximum burst time in units of 0.1ms, 0 meaning disabled
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*/
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struct ieee80211_tx_queue_params {
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int aifs;
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int cw_min;
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int cw_max;
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int burst_time;
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};
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/**
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* struct ieee80211_tx_queue_stats_data - transmit queue statistics
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*
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* @len: number of packets in queue
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* @limit: queue length limit
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* @count: number of frames sent
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*/
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struct ieee80211_tx_queue_stats_data {
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unsigned int len;
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unsigned int limit;
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unsigned int count;
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};
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/**
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* enum ieee80211_tx_queue - transmit queue number
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*
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* These constants are used with some callbacks that take a
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* queue number to set parameters for a queue.
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*
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* @IEEE80211_TX_QUEUE_DATA0: data queue 0
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* @IEEE80211_TX_QUEUE_DATA1: data queue 1
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* @IEEE80211_TX_QUEUE_DATA2: data queue 2
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* @IEEE80211_TX_QUEUE_DATA3: data queue 3
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* @IEEE80211_TX_QUEUE_DATA4: data queue 4
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* @IEEE80211_TX_QUEUE_SVP: ??
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* @NUM_TX_DATA_QUEUES: number of data queues
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* @IEEE80211_TX_QUEUE_AFTER_BEACON: transmit queue for frames to be
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* sent after a beacon
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* @IEEE80211_TX_QUEUE_BEACON: transmit queue for beacon frames
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*/
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enum ieee80211_tx_queue {
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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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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_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 key_idx; /* keyidx from hw->set_key(), undefined if
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* IEEE80211_TXCTL_DO_NOT_ENCRYPT is set */
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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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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 queue; /* hardware queue to use for this frame;
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* 0 = highest, hw->queues-1 = lowest */
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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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/**
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* enum mac80211_rx_flags - receive flags
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*
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* These flags are used with the @flag member of &struct ieee80211_rx_status.
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* @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame.
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* Use together with %RX_FLAG_MMIC_STRIPPED.
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* @RX_FLAG_DECRYPTED: This frame was decrypted in hardware.
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* @RX_FLAG_RADIOTAP: This frame starts with a radiotap header.
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* @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame,
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* verification has been done by the hardware.
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* @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame.
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* If this flag is set, the stack cannot do any replay detection
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* hence the driver or hardware will have to do that.
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* @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on
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* the frame.
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* @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on
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* the frame.
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*/
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enum mac80211_rx_flags {
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RX_FLAG_MMIC_ERROR = 1<<0,
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RX_FLAG_DECRYPTED = 1<<1,
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RX_FLAG_RADIOTAP = 1<<2,
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RX_FLAG_MMIC_STRIPPED = 1<<3,
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RX_FLAG_IV_STRIPPED = 1<<4,
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RX_FLAG_FAILED_FCS_CRC = 1<<5,
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RX_FLAG_FAILED_PLCP_CRC = 1<<6,
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};
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/**
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* struct ieee80211_rx_status - receive status
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*
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* The low-level driver should provide this information (the subset
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* supported by hardware) to the 802.11 code with each received
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* frame.
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* @mactime: MAC timestamp as defined by 802.11
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* @freq: frequency the radio was tuned to when receiving this frame, in MHz
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* @channel: channel the radio was tuned to
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* @phymode: active PHY mode
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* @ssi: signal strength when receiving this frame
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* @signal: used as 'qual' in statistics reporting
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* @noise: PHY noise when receiving this frame
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* @antenna: antenna used
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* @rate: data rate
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* @flag: %RX_FLAG_*
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*/
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struct ieee80211_rx_status {
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u64 mactime;
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int freq;
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int channel;
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enum ieee80211_phymode phymode;
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int ssi;
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int signal;
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int noise;
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int antenna;
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int rate;
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int flag;
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};
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/**
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* enum ieee80211_tx_status_flags - transmit status flags
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*
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* Status flags to indicate various transmit conditions.
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*
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* @IEEE80211_TX_STATUS_TX_FILTERED: The frame was not transmitted
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* because the destination STA was in powersave mode.
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*
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* @IEEE80211_TX_STATUS_ACK: Frame was acknowledged
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*/
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enum ieee80211_tx_status_flags {
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IEEE80211_TX_STATUS_TX_FILTERED = 1<<0,
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IEEE80211_TX_STATUS_ACK = 1<<1,
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};
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/**
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* struct ieee80211_tx_status - transmit status
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*
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* As much information as possible should be provided for each transmitted
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* frame with ieee80211_tx_status().
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*
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* @control: a copy of the &struct ieee80211_tx_control passed to the driver
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* in the tx() callback.
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*
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* @flags: transmit status flags, defined above
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*
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* @ack_signal: signal strength of the ACK frame
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*
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* @excessive_retries: set to 1 if the frame was retried many times
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* but not acknowledged
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*
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* @retry_count: number of retries
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*
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* @queue_length: ?? REMOVE
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* @queue_number: ?? REMOVE
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*/
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struct ieee80211_tx_status {
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struct ieee80211_tx_control control;
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u8 flags;
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bool excessive_retries;
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u8 retry_count;
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int ack_signal;
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int queue_length;
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int queue_number;
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};
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/**
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* enum ieee80211_conf_flags - configuration flags
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*
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* Flags to define PHY configuration options
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*
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* @IEEE80211_CONF_SHORT_SLOT_TIME: use 802.11g short slot time
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* @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported)
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*
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*/
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enum ieee80211_conf_flags {
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IEEE80211_CONF_SHORT_SLOT_TIME = 1<<0,
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IEEE80211_CONF_RADIOTAP = 1<<1,
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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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* TODO make a flag
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* @channel: IEEE 802.11 channel number
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* @freq: frequency in MHz
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* @channel_val: hardware specific channel value for the channel
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* @phymode: PHY mode to activate (REMOVE)
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* @chan: channel to switch to, pointer to the channel information
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* @mode: pointer to mode definition
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* @regulatory_domain: ??
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* @beacon_int: beacon interval (TODO make interface config)
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* @flags: configuration flags defined above
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* @power_level: transmit power limit for current regulatory domain in dBm
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* @antenna_max: maximum antenna gain
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* @antenna_sel_tx: transmit antenna selection, 0: default/diversity,
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* 1/2: antenna 0/1
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* @antenna_sel_rx: receive antenna selection, like @antenna_sel_tx
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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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enum ieee80211_phymode phymode;
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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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u32 flags;
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u8 power_level;
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u8 antenna_max;
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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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/**
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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_INVALID: invalid interface type, not used
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* by mac80211 itself
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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: VLAN interface bound to an AP, drivers
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* will never see this type.
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*/
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enum ieee80211_if_types {
|
|
IEEE80211_IF_TYPE_INVALID,
|
|
IEEE80211_IF_TYPE_AP,
|
|
IEEE80211_IF_TYPE_STA,
|
|
IEEE80211_IF_TYPE_IBSS,
|
|
IEEE80211_IF_TYPE_MNTR,
|
|
IEEE80211_IF_TYPE_WDS,
|
|
IEEE80211_IF_TYPE_VLAN,
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_if_init_conf - initial configuration of an interface
|
|
*
|
|
* @if_id: internal interface ID. This number has no particular meaning to
|
|
* drivers and the only allowed usage is to pass it to
|
|
* ieee80211_beacon_get() and ieee80211_get_buffered_bc() functions.
|
|
* This field is not valid for monitor interfaces
|
|
* (interfaces of %IEEE80211_IF_TYPE_MNTR type).
|
|
* @type: one of &enum ieee80211_if_types constants. Determines the type of
|
|
* added/removed interface.
|
|
* @mac_addr: pointer to MAC address of the interface. This pointer is valid
|
|
* until the interface is removed (i.e. it cannot be used after
|
|
* remove_interface() callback was called for this interface).
|
|
*
|
|
* This structure is used in add_interface() and remove_interface()
|
|
* callbacks of &struct ieee80211_hw.
|
|
*
|
|
* When you allow multiple interfaces to be added to your PHY, take care
|
|
* that the hardware can actually handle multiple MAC addresses. However,
|
|
* also take care that when there's no interface left with mac_addr != %NULL
|
|
* you remove the MAC address from the device to avoid acknowledging packets
|
|
* in pure monitor mode.
|
|
*/
|
|
struct ieee80211_if_init_conf {
|
|
int if_id;
|
|
enum ieee80211_if_types type;
|
|
void *mac_addr;
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_if_conf - configuration of an interface
|
|
*
|
|
* @type: type of the interface. This is always the same as was specified in
|
|
* &struct ieee80211_if_init_conf. The type of an interface never changes
|
|
* during the life of the interface; this field is present only for
|
|
* convenience.
|
|
* @bssid: BSSID of the network we are associated to/creating.
|
|
* @ssid: used (together with @ssid_len) by drivers for hardware that
|
|
* generate beacons independently. The pointer is valid only during the
|
|
* config_interface() call, so copy the value somewhere if you need
|
|
* it.
|
|
* @ssid_len: length of the @ssid field.
|
|
* @beacon: beacon template. Valid only if @host_gen_beacon_template in
|
|
* &struct ieee80211_hw is set. The driver is responsible of freeing
|
|
* the sk_buff.
|
|
* @beacon_control: tx_control for the beacon template, this field is only
|
|
* valid when the @beacon field was set.
|
|
*
|
|
* This structure is passed to the config_interface() callback of
|
|
* &struct ieee80211_hw.
|
|
*/
|
|
struct ieee80211_if_conf {
|
|
int type;
|
|
u8 *bssid;
|
|
u8 *ssid;
|
|
size_t ssid_len;
|
|
struct sk_buff *beacon;
|
|
struct ieee80211_tx_control *beacon_control;
|
|
};
|
|
|
|
/**
|
|
* enum ieee80211_key_alg - key algorithm
|
|
* @ALG_WEP: WEP40 or WEP104
|
|
* @ALG_TKIP: TKIP
|
|
* @ALG_CCMP: CCMP (AES)
|
|
*/
|
|
enum ieee80211_key_alg {
|
|
ALG_WEP,
|
|
ALG_TKIP,
|
|
ALG_CCMP,
|
|
};
|
|
|
|
|
|
/**
|
|
* enum ieee80211_key_flags - key flags
|
|
*
|
|
* These flags are used for communication about keys between the driver
|
|
* and mac80211, with the @flags parameter of &struct ieee80211_key_conf.
|
|
*
|
|
* @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates
|
|
* that the STA this key will be used with could be using QoS.
|
|
* @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the
|
|
* driver to indicate that it requires IV generation for this
|
|
* particular key.
|
|
* @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by
|
|
* the driver for a TKIP key if it requires Michael MIC
|
|
* generation in software.
|
|
*/
|
|
enum ieee80211_key_flags {
|
|
IEEE80211_KEY_FLAG_WMM_STA = 1<<0,
|
|
IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1,
|
|
IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2,
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_key_conf - key information
|
|
*
|
|
* This key information is given by mac80211 to the driver by
|
|
* the set_key() callback in &struct ieee80211_ops.
|
|
*
|
|
* @hw_key_idx: To be set by the driver, this is the key index the driver
|
|
* wants to be given when a frame is transmitted and needs to be
|
|
* encrypted in hardware.
|
|
* @alg: The key algorithm.
|
|
* @flags: key flags, see &enum ieee80211_key_flags.
|
|
* @keyidx: the key index (0-3)
|
|
* @keylen: key material length
|
|
* @key: key material
|
|
*/
|
|
struct ieee80211_key_conf {
|
|
enum ieee80211_key_alg alg;
|
|
u8 hw_key_idx;
|
|
u8 flags;
|
|
s8 keyidx;
|
|
u8 keylen;
|
|
u8 key[0];
|
|
};
|
|
|
|
#define IEEE80211_SEQ_COUNTER_RX 0
|
|
#define IEEE80211_SEQ_COUNTER_TX 1
|
|
|
|
/**
|
|
* enum set_key_cmd - key command
|
|
*
|
|
* Used with the set_key() callback in &struct ieee80211_ops, this
|
|
* indicates whether a key is being removed or added.
|
|
*
|
|
* @SET_KEY: a key is set
|
|
* @DISABLE_KEY: a key must be disabled
|
|
*/
|
|
enum set_key_cmd {
|
|
SET_KEY, DISABLE_KEY,
|
|
};
|
|
|
|
/**
|
|
* enum sta_notify_cmd - sta notify command
|
|
*
|
|
* Used with the sta_notify() callback in &struct ieee80211_ops, this
|
|
* indicates addition and removal of a station to station table
|
|
*
|
|
* @STA_NOTIFY_ADD: a station was added to the station table
|
|
* @STA_NOTIFY_REMOVE: a station being removed from the station table
|
|
*/
|
|
enum sta_notify_cmd {
|
|
STA_NOTIFY_ADD, STA_NOTIFY_REMOVE
|
|
};
|
|
|
|
/**
|
|
* enum ieee80211_hw_flags - hardware flags
|
|
*
|
|
* These flags are used to indicate hardware capabilities to
|
|
* the stack. Generally, flags here should have their meaning
|
|
* done in a way that the simplest hardware doesn't need setting
|
|
* any particular flags. There are some exceptions to this rule,
|
|
* however, so you are advised to review these flags carefully.
|
|
*
|
|
* @IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE:
|
|
* 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 call ieee80211_beacon_get() when you need the
|
|
* next beacon frame. Note that if you set this flag, you must
|
|
* implement the set_tim() callback for powersave mode to work
|
|
* properly.
|
|
* This flag is only relevant for access-point mode.
|
|
*
|
|
* @IEEE80211_HW_RX_INCLUDES_FCS:
|
|
* Indicates that received frames passed to the stack include
|
|
* the FCS at the end.
|
|
*
|
|
* @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING:
|
|
* 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 and
|
|
* multicast frames when there are power saving stations so that
|
|
* the driver can fetch them with ieee80211_get_buffered_bc(). Note
|
|
* that not setting this flag works properly only when the
|
|
* %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is also not set because
|
|
* otherwise the stack will not know when the DTIM beacon was sent.
|
|
*
|
|
* @IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED:
|
|
* Channels are already configured to the default regulatory domain
|
|
* specified in the device's EEPROM
|
|
*/
|
|
enum ieee80211_hw_flags {
|
|
IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE = 1<<0,
|
|
IEEE80211_HW_RX_INCLUDES_FCS = 1<<1,
|
|
IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2,
|
|
IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED = 1<<3,
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_hw - hardware information and state
|
|
*
|
|
* This structure contains the configuration and hardware
|
|
* information for an 802.11 PHY.
|
|
*
|
|
* @wiphy: This points to the &struct wiphy allocated for this
|
|
* 802.11 PHY. You must fill in the @perm_addr and @dev
|
|
* members of this structure using SET_IEEE80211_DEV()
|
|
* and SET_IEEE80211_PERM_ADDR().
|
|
*
|
|
* @conf: &struct ieee80211_conf, device configuration, don't use.
|
|
*
|
|
* @workqueue: single threaded workqueue available for driver use,
|
|
* allocated by mac80211 on registration and flushed on
|
|
* unregistration.
|
|
*
|
|
* @priv: pointer to private area that was allocated for driver use
|
|
* along with this structure.
|
|
*
|
|
* @flags: hardware flags, see &enum ieee80211_hw_flags.
|
|
*
|
|
* @extra_tx_headroom: headroom to reserve in each transmit skb
|
|
* for use by the driver (e.g. for transmit headers.)
|
|
*
|
|
* @channel_change_time: time (in microseconds) it takes to change channels.
|
|
*
|
|
* @max_rssi: Maximum value for ssi in RX information, use
|
|
* negative numbers for dBm and 0 to indicate no support.
|
|
*
|
|
* @max_signal: like @max_rssi, but for the signal value.
|
|
*
|
|
* @max_noise: like @max_rssi, but for the noise value.
|
|
*
|
|
* @queues: number of available hardware transmit queues for
|
|
* data packets. WMM/QoS requires at least four.
|
|
*/
|
|
struct ieee80211_hw {
|
|
struct ieee80211_conf conf;
|
|
struct wiphy *wiphy;
|
|
struct workqueue_struct *workqueue;
|
|
void *priv;
|
|
u32 flags;
|
|
unsigned int extra_tx_headroom;
|
|
int channel_change_time;
|
|
u8 queues;
|
|
s8 max_rssi;
|
|
s8 max_signal;
|
|
s8 max_noise;
|
|
};
|
|
|
|
/**
|
|
* SET_IEEE80211_DEV - set device for 802.11 hardware
|
|
*
|
|
* @hw: the &struct ieee80211_hw to set the device for
|
|
* @dev: the &struct device of this 802.11 device
|
|
*/
|
|
static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev)
|
|
{
|
|
set_wiphy_dev(hw->wiphy, dev);
|
|
}
|
|
|
|
/**
|
|
* SET_IEEE80211_PERM_ADDR - set the permanenet MAC address for 802.11 hardware
|
|
*
|
|
* @hw: the &struct ieee80211_hw to set the MAC address for
|
|
* @addr: the address to set
|
|
*/
|
|
static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr)
|
|
{
|
|
memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN);
|
|
}
|
|
|
|
/**
|
|
* DOC: Hardware crypto acceleration
|
|
*
|
|
* mac80211 is capable of taking advantage of many hardware
|
|
* acceleration designs for encryption and decryption operations.
|
|
*
|
|
* The set_key() callback in the &struct ieee80211_ops for a given
|
|
* device is called to enable hardware acceleration of encryption and
|
|
* decryption. The callback takes an @address parameter that will be
|
|
* the broadcast address for default keys, the other station's hardware
|
|
* address for individual keys or the zero address for keys that will
|
|
* be used only for transmission.
|
|
* Multiple transmission keys with the same key index may be used when
|
|
* VLANs are configured for an access point.
|
|
*
|
|
* The @local_address parameter will always be set to our own address,
|
|
* this is only relevant if you support multiple local addresses.
|
|
*
|
|
* When transmitting, the TX control data will use the @hw_key_idx
|
|
* selected by the driver by modifying the &struct ieee80211_key_conf
|
|
* pointed to by the @key parameter to the set_key() function.
|
|
*
|
|
* The set_key() call for the %SET_KEY command should return 0 if
|
|
* the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be
|
|
* added; if you return 0 then hw_key_idx must be assigned to the
|
|
* hardware key index, you are free to use the full u8 range.
|
|
*
|
|
* When the cmd is %DISABLE_KEY then it must succeed.
|
|
*
|
|
* Note that it is permissible to not decrypt a frame even if a key
|
|
* for it has been uploaded to hardware, the stack will not make any
|
|
* decision based on whether a key has been uploaded or not but rather
|
|
* based on the receive flags.
|
|
*
|
|
* The &struct ieee80211_key_conf structure pointed to by the @key
|
|
* parameter is guaranteed to be valid until another call to set_key()
|
|
* removes it, but it can only be used as a cookie to differentiate
|
|
* keys.
|
|
*/
|
|
|
|
/**
|
|
* DOC: Frame filtering
|
|
*
|
|
* mac80211 requires to see many management frames for proper
|
|
* operation, and users may want to see many more frames when
|
|
* in monitor mode. However, for best CPU usage and power consumption,
|
|
* having as few frames as possible percolate through the stack is
|
|
* desirable. Hence, the hardware should filter as much as possible.
|
|
*
|
|
* To achieve this, mac80211 uses filter flags (see below) to tell
|
|
* the driver's configure_filter() function which frames should be
|
|
* passed to mac80211 and which should be filtered out.
|
|
*
|
|
* The configure_filter() callback is invoked with the parameters
|
|
* @mc_count and @mc_list for the combined multicast address list
|
|
* of all virtual interfaces, @changed_flags telling which flags
|
|
* were changed and @total_flags with the new flag states.
|
|
*
|
|
* If your device has no multicast address filters your driver will
|
|
* need to check both the %FIF_ALLMULTI flag and the @mc_count
|
|
* parameter to see whether multicast frames should be accepted
|
|
* or dropped.
|
|
*
|
|
* All unsupported flags in @total_flags must be cleared, i.e. you
|
|
* should clear all bits except those you honoured.
|
|
*/
|
|
|
|
/**
|
|
* enum ieee80211_filter_flags - hardware filter flags
|
|
*
|
|
* These flags determine what the filter in hardware should be
|
|
* programmed to let through and what should not be passed to the
|
|
* stack. It is always safe to pass more frames than requested,
|
|
* but this has negative impact on power consumption.
|
|
*
|
|
* @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS,
|
|
* think of the BSS as your network segment and then this corresponds
|
|
* to the regular ethernet device promiscuous mode.
|
|
*
|
|
* @FIF_ALLMULTI: pass all multicast frames, this is used if requested
|
|
* by the user or if the hardware is not capable of filtering by
|
|
* multicast address.
|
|
*
|
|
* @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the
|
|
* %RX_FLAG_FAILED_FCS_CRC for them)
|
|
*
|
|
* @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set
|
|
* the %RX_FLAG_FAILED_PLCP_CRC for them
|
|
*
|
|
* @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate
|
|
* to the hardware that it should not filter beacons or probe responses
|
|
* by BSSID. Filtering them can greatly reduce the amount of processing
|
|
* mac80211 needs to do and the amount of CPU wakeups, so you should
|
|
* honour this flag if possible.
|
|
*
|
|
* @FIF_CONTROL: pass control frames, if PROMISC_IN_BSS is not set then
|
|
* only those addressed to this station
|
|
*
|
|
* @FIF_OTHER_BSS: pass frames destined to other BSSes
|
|
*/
|
|
enum ieee80211_filter_flags {
|
|
FIF_PROMISC_IN_BSS = 1<<0,
|
|
FIF_ALLMULTI = 1<<1,
|
|
FIF_FCSFAIL = 1<<2,
|
|
FIF_PLCPFAIL = 1<<3,
|
|
FIF_BCN_PRBRESP_PROMISC = 1<<4,
|
|
FIF_CONTROL = 1<<5,
|
|
FIF_OTHER_BSS = 1<<6,
|
|
};
|
|
|
|
/**
|
|
* enum ieee80211_erp_change_flags - erp change flags
|
|
*
|
|
* These flags are used with the erp_ie_changed() callback in
|
|
* &struct ieee80211_ops to indicate which parameter(s) changed.
|
|
* @IEEE80211_ERP_CHANGE_PROTECTION: protection changed
|
|
* @IEEE80211_ERP_CHANGE_PREAMBLE: barker preamble mode changed
|
|
*/
|
|
enum ieee80211_erp_change_flags {
|
|
IEEE80211_ERP_CHANGE_PROTECTION = 1<<0,
|
|
IEEE80211_ERP_CHANGE_PREAMBLE = 1<<1,
|
|
};
|
|
|
|
|
|
/**
|
|
* struct ieee80211_ops - callbacks from mac80211 to the driver
|
|
*
|
|
* This structure contains various callbacks that the driver may
|
|
* handle or, in some cases, must handle, for example to configure
|
|
* the hardware to a new channel or to transmit a frame.
|
|
*
|
|
* @tx: 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 implemented and
|
|
* atomic.
|
|
*
|
|
* @start: Called before the first netdevice attached to the hardware
|
|
* is enabled. This should turn on the hardware and must turn on
|
|
* frame reception (for possibly enabled monitor interfaces.)
|
|
* Returns negative error codes, these may be seen in userspace,
|
|
* or zero.
|
|
* When the device is started it should not have a MAC address
|
|
* to avoid acknowledging frames before a non-monitor device
|
|
* is added.
|
|
* Must be implemented.
|
|
*
|
|
* @stop: Called after last netdevice attached to the hardware
|
|
* is disabled. This should turn off the hardware (at least
|
|
* it must turn off frame reception.)
|
|
* May be called right after add_interface if that rejects
|
|
* an interface.
|
|
* Must be implemented.
|
|
*
|
|
* @add_interface: Called when a netdevice attached to the hardware is
|
|
* enabled. Because it is not called for monitor mode devices, @open
|
|
* and @stop must be implemented.
|
|
* The driver should perform any initialization it needs before
|
|
* the device can be enabled. The initial configuration for the
|
|
* interface is given in the conf parameter.
|
|
* The callback may refuse to add an interface by returning a
|
|
* negative error code (which will be seen in userspace.)
|
|
* Must be implemented.
|
|
*
|
|
* @remove_interface: Notifies a driver that an interface is going down.
|
|
* The @stop callback is called after this if it is the last interface
|
|
* and no monitor interfaces are present.
|
|
* When all interfaces are removed, the MAC address in the hardware
|
|
* must be cleared so the device no longer acknowledges packets,
|
|
* the mac_addr member of the conf structure is, however, set to the
|
|
* MAC address of the device going away.
|
|
* Hence, this callback must be implemented.
|
|
*
|
|
* @config: Handler for configuration requests. IEEE 802.11 code calls this
|
|
* function to change hardware configuration, e.g., channel.
|
|
*
|
|
* @config_interface: Handler for configuration requests related to interfaces
|
|
* (e.g. BSSID changes.)
|
|
*
|
|
* @configure_filter: Configure the device's RX filter.
|
|
* See the section "Frame filtering" for more information.
|
|
* This callback must be implemented and atomic.
|
|
*
|
|
* @set_tim: Set TIM bit. If the hardware/firmware takes care of beacon
|
|
* generation (that is, %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is set)
|
|
* mac80211 calls this function when a TIM bit must be set or cleared
|
|
* for a given AID. Must be atomic.
|
|
*
|
|
* @set_key: See the section "Hardware crypto acceleration"
|
|
* This callback can sleep, and is only called between add_interface
|
|
* and remove_interface calls, i.e. while the interface with the
|
|
* given local_address is enabled.
|
|
*
|
|
* @set_ieee8021x: 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.
|
|
*
|
|
* @set_port_auth: Set port authorization state (IEEE 802.1X PAE) to be
|
|
* authorized (@authorized=1) or unauthorized (=0). This function can be
|
|
* used if the wlan hardware or low-level driver implements PAE.
|
|
* mac80211 will filter frames based on authorization state in any case,
|
|
* so this function pointer can be NULL if low-level driver does not
|
|
* require event notification about port state changes.
|
|
*
|
|
* @hw_scan: Ask the hardware to service the scan request, no need to start
|
|
* the scan state machine in stack.
|
|
*
|
|
* @get_stats: return low-level statistics
|
|
*
|
|
* @set_privacy_invoked: 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.
|
|
*
|
|
* @get_sequence_counter: For devices that have internal sequence counters this
|
|
* callback allows mac80211 to access the current value of a counter.
|
|
* This callback seems not well-defined, tell us if you need it.
|
|
*
|
|
* @set_rts_threshold: Configuration of RTS threshold (if device needs it)
|
|
*
|
|
* @set_frag_threshold: 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.
|
|
*
|
|
* @set_retry_limit: Configuration of retry limits (if device needs it)
|
|
*
|
|
* @sta_notify: Notifies low level driver about addition or removal
|
|
* of assocaited station or AP.
|
|
*
|
|
* @erp_ie_changed: Handle ERP IE change notifications. Must be atomic.
|
|
*
|
|
* @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
|
|
* bursting) for a hardware TX queue. The @queue parameter uses the
|
|
* %IEEE80211_TX_QUEUE_* constants. Must be atomic.
|
|
*
|
|
* @get_tx_stats: 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). This information is used for WMM to find out which TX
|
|
* queues have room for more packets and by hostapd to provide
|
|
* statistics about the current queueing state to external programs.
|
|
*
|
|
* @get_tsf: 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.
|
|
*
|
|
* @reset_tsf: 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.
|
|
*
|
|
* @beacon_update: Setup beacon data for IBSS beacons. Unlike access point,
|
|
* IBSS uses a fixed beacon frame which is configured using this
|
|
* function.
|
|
* If the driver returns success (0) from this callback, it owns
|
|
* the skb. That means the driver is responsible to kfree_skb() it.
|
|
* The control structure is not dynamically allocated. That means the
|
|
* driver does not own the pointer and if it needs it somewhere
|
|
* outside of the context of this function, it must copy it
|
|
* somewhere else.
|
|
* This handler is required only for IBSS mode.
|
|
*
|
|
* @tx_last_beacon: 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.
|
|
*/
|
|
struct ieee80211_ops {
|
|
int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb,
|
|
struct ieee80211_tx_control *control);
|
|
int (*start)(struct ieee80211_hw *hw);
|
|
void (*stop)(struct ieee80211_hw *hw);
|
|
int (*add_interface)(struct ieee80211_hw *hw,
|
|
struct ieee80211_if_init_conf *conf);
|
|
void (*remove_interface)(struct ieee80211_hw *hw,
|
|
struct ieee80211_if_init_conf *conf);
|
|
int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
|
|
int (*config_interface)(struct ieee80211_hw *hw,
|
|
int if_id, struct ieee80211_if_conf *conf);
|
|
void (*configure_filter)(struct ieee80211_hw *hw,
|
|
unsigned int changed_flags,
|
|
unsigned int *total_flags,
|
|
int mc_count, struct dev_addr_list *mc_list);
|
|
int (*set_tim)(struct ieee80211_hw *hw, int aid, int set);
|
|
int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd,
|
|
const u8 *local_address, const u8 *address,
|
|
struct ieee80211_key_conf *key);
|
|
int (*set_ieee8021x)(struct ieee80211_hw *hw, int use_ieee8021x);
|
|
int (*set_port_auth)(struct ieee80211_hw *hw, u8 *addr,
|
|
int authorized);
|
|
int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len);
|
|
int (*get_stats)(struct ieee80211_hw *hw,
|
|
struct ieee80211_low_level_stats *stats);
|
|
int (*set_privacy_invoked)(struct ieee80211_hw *hw,
|
|
int privacy_invoked);
|
|
int (*get_sequence_counter)(struct ieee80211_hw *hw,
|
|
u8* addr, u8 keyidx, u8 txrx,
|
|
u32* iv32, u16* iv16);
|
|
int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value);
|
|
int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value);
|
|
int (*set_retry_limit)(struct ieee80211_hw *hw,
|
|
u32 short_retry, u32 long_retr);
|
|
void (*sta_notify)(struct ieee80211_hw *hw, int if_id,
|
|
enum sta_notify_cmd, const u8 *addr);
|
|
void (*erp_ie_changed)(struct ieee80211_hw *hw, u8 changes,
|
|
int cts_protection, int preamble);
|
|
int (*conf_tx)(struct ieee80211_hw *hw, int queue,
|
|
const struct ieee80211_tx_queue_params *params);
|
|
int (*get_tx_stats)(struct ieee80211_hw *hw,
|
|
struct ieee80211_tx_queue_stats *stats);
|
|
u64 (*get_tsf)(struct ieee80211_hw *hw);
|
|
void (*reset_tsf)(struct ieee80211_hw *hw);
|
|
int (*beacon_update)(struct ieee80211_hw *hw,
|
|
struct sk_buff *skb,
|
|
struct ieee80211_tx_control *control);
|
|
int (*tx_last_beacon)(struct ieee80211_hw *hw);
|
|
};
|
|
|
|
/**
|
|
* ieee80211_alloc_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.
|
|
* mac80211 allocates a private data area for the driver pointed to by
|
|
* @priv in &struct ieee80211_hw, the size of this area is given as
|
|
* @priv_data_len.
|
|
*
|
|
* @priv_data_len: length of private data
|
|
* @ops: callbacks for this device
|
|
*/
|
|
struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
|
|
const struct ieee80211_ops *ops);
|
|
|
|
/**
|
|
* ieee80211_register_hw - Register hardware device
|
|
*
|
|
* You must call this function before any other functions
|
|
* except ieee80211_register_hwmode.
|
|
*
|
|
* @hw: the device to register as returned by ieee80211_alloc_hw()
|
|
*/
|
|
int ieee80211_register_hw(struct ieee80211_hw *hw);
|
|
|
|
#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);
|
|
extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw);
|
|
#endif
|
|
/**
|
|
* ieee80211_get_tx_led_name - get name of TX LED
|
|
*
|
|
* mac80211 creates a transmit LED trigger for each wireless hardware
|
|
* that can be used to drive LEDs if your driver registers a LED device.
|
|
* This function returns the name (or %NULL if not configured for LEDs)
|
|
* of the trigger so you can automatically link the LED device.
|
|
*
|
|
* @hw: the hardware to get the LED trigger name for
|
|
*/
|
|
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
|
|
}
|
|
|
|
/**
|
|
* ieee80211_get_rx_led_name - get name of RX LED
|
|
*
|
|
* mac80211 creates a receive LED trigger for each wireless hardware
|
|
* that can be used to drive LEDs if your driver registers a LED device.
|
|
* This function returns the name (or %NULL if not configured for LEDs)
|
|
* of the trigger so you can automatically link the LED device.
|
|
*
|
|
* @hw: the hardware to get the LED trigger name for
|
|
*/
|
|
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
|
|
}
|
|
|
|
static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw)
|
|
{
|
|
#ifdef CONFIG_MAC80211_LEDS
|
|
return __ieee80211_get_assoc_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);
|
|
|
|
/**
|
|
* ieee80211_unregister_hw - Unregister a hardware device
|
|
*
|
|
* This function instructs mac80211 to free allocated resources
|
|
* and unregister netdevices from the networking subsystem.
|
|
*
|
|
* @hw: the hardware to unregister
|
|
*/
|
|
void ieee80211_unregister_hw(struct ieee80211_hw *hw);
|
|
|
|
/**
|
|
* ieee80211_free_hw - free hardware descriptor
|
|
*
|
|
* This function frees everything that was allocated, including the
|
|
* private data for the driver. You must call ieee80211_unregister_hw()
|
|
* before calling this function
|
|
*
|
|
* @hw: the hardware to free
|
|
*/
|
|
void ieee80211_free_hw(struct ieee80211_hw *hw);
|
|
|
|
/* trick to avoid symbol clashes with the ieee80211 subsystem */
|
|
void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
|
|
struct ieee80211_rx_status *status);
|
|
|
|
/**
|
|
* ieee80211_rx - receive frame
|
|
*
|
|
* Use this function to hand received frames to mac80211. The receive
|
|
* buffer in @skb must start with an IEEE 802.11 header or a radiotap
|
|
* header if %RX_FLAG_RADIOTAP is set in the @status flags.
|
|
*
|
|
* This function may not be called in IRQ context.
|
|
*
|
|
* @hw: the hardware this frame came in on
|
|
* @skb: the buffer to receive, owned by mac80211 after this call
|
|
* @status: status of this frame; the status pointer need not be valid
|
|
* after this function returns
|
|
*/
|
|
static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
|
|
struct ieee80211_rx_status *status)
|
|
{
|
|
__ieee80211_rx(hw, skb, status);
|
|
}
|
|
|
|
/**
|
|
* ieee80211_rx_irqsafe - receive frame
|
|
*
|
|
* Like ieee80211_rx() but can be called in IRQ context
|
|
* (internally defers to a workqueue.)
|
|
*
|
|
* @hw: the hardware this frame came in on
|
|
* @skb: the buffer to receive, owned by mac80211 after this call
|
|
* @status: status of this frame; the status pointer need not be valid
|
|
* after this function returns and is not freed by mac80211,
|
|
* it is recommended that it points to a stack area
|
|
*/
|
|
void ieee80211_rx_irqsafe(struct ieee80211_hw *hw,
|
|
struct sk_buff *skb,
|
|
struct ieee80211_rx_status *status);
|
|
|
|
/**
|
|
* ieee80211_tx_status - transmit status callback
|
|
*
|
|
* Call this function for all transmitted frames after they have been
|
|
* transmitted. It is permissible to not call this function for
|
|
* multicast frames but this can affect statistics.
|
|
*
|
|
* @hw: the hardware the frame was transmitted by
|
|
* @skb: the frame that was transmitted, owned by mac80211 after this call
|
|
* @status: status information for this frame; the status pointer need not
|
|
* be valid after this function returns and is not freed by mac80211,
|
|
* it is recommended that it points to a stack area
|
|
*/
|
|
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);
|
|
|
|
/**
|
|
* ieee80211_ctstoself_get - CTS-to-self 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 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, int if_id,
|
|
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().
|
|
* @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 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, int if_id,
|
|
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().
|
|
* @if_id: interface ID from &struct ieee80211_if_init_conf.
|
|
* @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, int if_id,
|
|
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);
|
|
|
|
/**
|
|
* ieee80211_get_hdrlen_from_skb - get header length from data
|
|
*
|
|
* Given an skb 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.
|
|
*
|
|
* @skb: the frame
|
|
*/
|
|
int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb);
|
|
|
|
/**
|
|
* ieee80211_get_hdrlen - get header length from frame control
|
|
*
|
|
* This function returns the 802.11 header length in bytes (not including
|
|
* encryption headers.)
|
|
*
|
|
* @fc: the frame control field (in CPU endianness)
|
|
*/
|
|
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.
|
|
*/
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|
void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue);
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|
|
|
/**
|
|
* 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);
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|
|
|
/**
|
|
* 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_scan_completed - completed hardware scan
|
|
*
|
|
* When hardware scan offload is used (i.e. the hw_scan() callback is
|
|
* assigned) this function needs to be called by the driver to notify
|
|
* mac80211 that the scan finished.
|
|
*
|
|
* @hw: the hardware that finished the scan
|
|
*/
|
|
void ieee80211_scan_completed(struct ieee80211_hw *hw);
|
|
|
|
#endif /* MAC80211_H */
|
|
|