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2286 lines
54 KiB
2286 lines
54 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
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* Wireless utility functions |
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* |
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* Copyright 2007-2009 Johannes Berg <[email protected]> |
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* Copyright 2013-2014 Intel Mobile Communications GmbH |
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* Copyright 2017 Intel Deutschland GmbH |
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* Copyright (C) 2018-2020 Intel Corporation |
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*/ |
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#include <linux/export.h> |
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#include <linux/bitops.h> |
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#include <linux/etherdevice.h> |
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#include <linux/slab.h> |
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#include <linux/ieee80211.h> |
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#include <net/cfg80211.h> |
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#include <net/ip.h> |
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#include <net/dsfield.h> |
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#include <linux/if_vlan.h> |
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#include <linux/mpls.h> |
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#include <linux/gcd.h> |
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#include <linux/bitfield.h> |
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#include <linux/nospec.h> |
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#include "core.h" |
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#include "rdev-ops.h" |
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|
|
|
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const struct ieee80211_rate * |
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ieee80211_get_response_rate(struct ieee80211_supported_band *sband, |
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u32 basic_rates, int bitrate) |
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{ |
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struct ieee80211_rate *result = &sband->bitrates[0]; |
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int i; |
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|
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for (i = 0; i < sband->n_bitrates; i++) { |
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if (!(basic_rates & BIT(i))) |
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continue; |
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if (sband->bitrates[i].bitrate > bitrate) |
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continue; |
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result = &sband->bitrates[i]; |
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} |
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|
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return result; |
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} |
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EXPORT_SYMBOL(ieee80211_get_response_rate); |
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|
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u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband, |
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enum nl80211_bss_scan_width scan_width) |
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{ |
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struct ieee80211_rate *bitrates; |
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u32 mandatory_rates = 0; |
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enum ieee80211_rate_flags mandatory_flag; |
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int i; |
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|
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if (WARN_ON(!sband)) |
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return 1; |
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|
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if (sband->band == NL80211_BAND_2GHZ) { |
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if (scan_width == NL80211_BSS_CHAN_WIDTH_5 || |
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scan_width == NL80211_BSS_CHAN_WIDTH_10) |
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mandatory_flag = IEEE80211_RATE_MANDATORY_G; |
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else |
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mandatory_flag = IEEE80211_RATE_MANDATORY_B; |
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} else { |
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mandatory_flag = IEEE80211_RATE_MANDATORY_A; |
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} |
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|
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bitrates = sband->bitrates; |
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for (i = 0; i < sband->n_bitrates; i++) |
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if (bitrates[i].flags & mandatory_flag) |
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mandatory_rates |= BIT(i); |
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return mandatory_rates; |
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} |
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EXPORT_SYMBOL(ieee80211_mandatory_rates); |
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|
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u32 ieee80211_channel_to_freq_khz(int chan, enum nl80211_band band) |
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{ |
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/* see 802.11 17.3.8.3.2 and Annex J |
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* there are overlapping channel numbers in 5GHz and 2GHz bands */ |
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if (chan <= 0) |
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return 0; /* not supported */ |
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switch (band) { |
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case NL80211_BAND_2GHZ: |
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case NL80211_BAND_LC: |
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if (chan == 14) |
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return MHZ_TO_KHZ(2484); |
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else if (chan < 14) |
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return MHZ_TO_KHZ(2407 + chan * 5); |
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break; |
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case NL80211_BAND_5GHZ: |
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if (chan >= 182 && chan <= 196) |
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return MHZ_TO_KHZ(4000 + chan * 5); |
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else |
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return MHZ_TO_KHZ(5000 + chan * 5); |
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break; |
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case NL80211_BAND_6GHZ: |
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/* see 802.11ax D6.1 27.3.23.2 */ |
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if (chan == 2) |
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return MHZ_TO_KHZ(5935); |
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if (chan <= 233) |
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return MHZ_TO_KHZ(5950 + chan * 5); |
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break; |
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case NL80211_BAND_60GHZ: |
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if (chan < 7) |
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return MHZ_TO_KHZ(56160 + chan * 2160); |
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break; |
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case NL80211_BAND_S1GHZ: |
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return 902000 + chan * 500; |
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default: |
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; |
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} |
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return 0; /* not supported */ |
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} |
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EXPORT_SYMBOL(ieee80211_channel_to_freq_khz); |
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|
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enum nl80211_chan_width |
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ieee80211_s1g_channel_width(const struct ieee80211_channel *chan) |
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{ |
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if (WARN_ON(!chan || chan->band != NL80211_BAND_S1GHZ)) |
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return NL80211_CHAN_WIDTH_20_NOHT; |
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|
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/*S1G defines a single allowed channel width per channel. |
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* Extract that width here. |
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*/ |
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if (chan->flags & IEEE80211_CHAN_1MHZ) |
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return NL80211_CHAN_WIDTH_1; |
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else if (chan->flags & IEEE80211_CHAN_2MHZ) |
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return NL80211_CHAN_WIDTH_2; |
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else if (chan->flags & IEEE80211_CHAN_4MHZ) |
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return NL80211_CHAN_WIDTH_4; |
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else if (chan->flags & IEEE80211_CHAN_8MHZ) |
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return NL80211_CHAN_WIDTH_8; |
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else if (chan->flags & IEEE80211_CHAN_16MHZ) |
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return NL80211_CHAN_WIDTH_16; |
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|
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pr_err("unknown channel width for channel at %dKHz?\n", |
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ieee80211_channel_to_khz(chan)); |
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|
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return NL80211_CHAN_WIDTH_1; |
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} |
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EXPORT_SYMBOL(ieee80211_s1g_channel_width); |
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|
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int ieee80211_freq_khz_to_channel(u32 freq) |
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{ |
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/* TODO: just handle MHz for now */ |
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freq = KHZ_TO_MHZ(freq); |
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|
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/* see 802.11 17.3.8.3.2 and Annex J */ |
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if (freq == 2484) |
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return 14; |
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else if (freq < 2484) |
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return (freq - 2407) / 5; |
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else if (freq >= 4910 && freq <= 4980) |
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return (freq - 4000) / 5; |
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else if (freq < 5925) |
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return (freq - 5000) / 5; |
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else if (freq == 5935) |
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return 2; |
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else if (freq <= 45000) /* DMG band lower limit */ |
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/* see 802.11ax D6.1 27.3.22.2 */ |
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return (freq - 5950) / 5; |
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else if (freq >= 58320 && freq <= 70200) |
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return (freq - 56160) / 2160; |
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else |
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return 0; |
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} |
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EXPORT_SYMBOL(ieee80211_freq_khz_to_channel); |
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|
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struct ieee80211_channel *ieee80211_get_channel_khz(struct wiphy *wiphy, |
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u32 freq) |
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{ |
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enum nl80211_band band; |
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struct ieee80211_supported_band *sband; |
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int i; |
|
|
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for (band = 0; band < NUM_NL80211_BANDS; band++) { |
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sband = wiphy->bands[band]; |
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|
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if (!sband) |
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continue; |
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|
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for (i = 0; i < sband->n_channels; i++) { |
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struct ieee80211_channel *chan = &sband->channels[i]; |
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|
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if (ieee80211_channel_to_khz(chan) == freq) |
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return chan; |
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} |
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} |
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|
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return NULL; |
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} |
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EXPORT_SYMBOL(ieee80211_get_channel_khz); |
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|
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static void set_mandatory_flags_band(struct ieee80211_supported_band *sband) |
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{ |
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int i, want; |
|
|
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switch (sband->band) { |
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case NL80211_BAND_5GHZ: |
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case NL80211_BAND_6GHZ: |
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want = 3; |
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for (i = 0; i < sband->n_bitrates; i++) { |
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if (sband->bitrates[i].bitrate == 60 || |
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sband->bitrates[i].bitrate == 120 || |
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sband->bitrates[i].bitrate == 240) { |
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sband->bitrates[i].flags |= |
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IEEE80211_RATE_MANDATORY_A; |
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want--; |
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} |
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} |
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WARN_ON(want); |
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break; |
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case NL80211_BAND_2GHZ: |
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case NL80211_BAND_LC: |
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want = 7; |
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for (i = 0; i < sband->n_bitrates; i++) { |
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switch (sband->bitrates[i].bitrate) { |
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case 10: |
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case 20: |
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case 55: |
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case 110: |
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sband->bitrates[i].flags |= |
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IEEE80211_RATE_MANDATORY_B | |
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IEEE80211_RATE_MANDATORY_G; |
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want--; |
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break; |
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case 60: |
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case 120: |
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case 240: |
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sband->bitrates[i].flags |= |
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IEEE80211_RATE_MANDATORY_G; |
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want--; |
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fallthrough; |
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default: |
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sband->bitrates[i].flags |= |
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IEEE80211_RATE_ERP_G; |
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break; |
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} |
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} |
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WARN_ON(want != 0 && want != 3); |
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break; |
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case NL80211_BAND_60GHZ: |
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/* check for mandatory HT MCS 1..4 */ |
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WARN_ON(!sband->ht_cap.ht_supported); |
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WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e); |
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break; |
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case NL80211_BAND_S1GHZ: |
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/* Figure 9-589bd: 3 means unsupported, so != 3 means at least |
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* mandatory is ok. |
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*/ |
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WARN_ON((sband->s1g_cap.nss_mcs[0] & 0x3) == 0x3); |
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break; |
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case NUM_NL80211_BANDS: |
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default: |
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WARN_ON(1); |
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break; |
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} |
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} |
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|
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void ieee80211_set_bitrate_flags(struct wiphy *wiphy) |
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{ |
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enum nl80211_band band; |
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|
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for (band = 0; band < NUM_NL80211_BANDS; band++) |
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if (wiphy->bands[band]) |
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set_mandatory_flags_band(wiphy->bands[band]); |
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} |
|
|
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bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher) |
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{ |
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int i; |
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for (i = 0; i < wiphy->n_cipher_suites; i++) |
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if (cipher == wiphy->cipher_suites[i]) |
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return true; |
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return false; |
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} |
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|
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static bool |
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cfg80211_igtk_cipher_supported(struct cfg80211_registered_device *rdev) |
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{ |
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struct wiphy *wiphy = &rdev->wiphy; |
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int i; |
|
|
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for (i = 0; i < wiphy->n_cipher_suites; i++) { |
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switch (wiphy->cipher_suites[i]) { |
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case WLAN_CIPHER_SUITE_AES_CMAC: |
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case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
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case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
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case WLAN_CIPHER_SUITE_BIP_GMAC_256: |
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return true; |
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} |
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} |
|
|
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return false; |
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} |
|
|
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bool cfg80211_valid_key_idx(struct cfg80211_registered_device *rdev, |
|
int key_idx, bool pairwise) |
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{ |
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int max_key_idx; |
|
|
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if (pairwise) |
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max_key_idx = 3; |
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else if (wiphy_ext_feature_isset(&rdev->wiphy, |
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NL80211_EXT_FEATURE_BEACON_PROTECTION) || |
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wiphy_ext_feature_isset(&rdev->wiphy, |
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NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT)) |
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max_key_idx = 7; |
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else if (cfg80211_igtk_cipher_supported(rdev)) |
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max_key_idx = 5; |
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else |
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max_key_idx = 3; |
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|
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if (key_idx < 0 || key_idx > max_key_idx) |
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return false; |
|
|
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return true; |
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} |
|
|
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int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, |
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struct key_params *params, int key_idx, |
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bool pairwise, const u8 *mac_addr) |
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{ |
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if (!cfg80211_valid_key_idx(rdev, key_idx, pairwise)) |
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return -EINVAL; |
|
|
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if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)) |
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return -EINVAL; |
|
|
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if (pairwise && !mac_addr) |
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return -EINVAL; |
|
|
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switch (params->cipher) { |
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case WLAN_CIPHER_SUITE_TKIP: |
|
/* Extended Key ID can only be used with CCMP/GCMP ciphers */ |
|
if ((pairwise && key_idx) || |
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params->mode != NL80211_KEY_RX_TX) |
|
return -EINVAL; |
|
break; |
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case WLAN_CIPHER_SUITE_CCMP: |
|
case WLAN_CIPHER_SUITE_CCMP_256: |
|
case WLAN_CIPHER_SUITE_GCMP: |
|
case WLAN_CIPHER_SUITE_GCMP_256: |
|
/* IEEE802.11-2016 allows only 0 and - when supporting |
|
* Extended Key ID - 1 as index for pairwise keys. |
|
* @NL80211_KEY_NO_TX is only allowed for pairwise keys when |
|
* the driver supports Extended Key ID. |
|
* @NL80211_KEY_SET_TX can't be set when installing and |
|
* validating a key. |
|
*/ |
|
if ((params->mode == NL80211_KEY_NO_TX && !pairwise) || |
|
params->mode == NL80211_KEY_SET_TX) |
|
return -EINVAL; |
|
if (wiphy_ext_feature_isset(&rdev->wiphy, |
|
NL80211_EXT_FEATURE_EXT_KEY_ID)) { |
|
if (pairwise && (key_idx < 0 || key_idx > 1)) |
|
return -EINVAL; |
|
} else if (pairwise && key_idx) { |
|
return -EINVAL; |
|
} |
|
break; |
|
case WLAN_CIPHER_SUITE_AES_CMAC: |
|
case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
|
case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
|
case WLAN_CIPHER_SUITE_BIP_GMAC_256: |
|
/* Disallow BIP (group-only) cipher as pairwise cipher */ |
|
if (pairwise) |
|
return -EINVAL; |
|
if (key_idx < 4) |
|
return -EINVAL; |
|
break; |
|
case WLAN_CIPHER_SUITE_WEP40: |
|
case WLAN_CIPHER_SUITE_WEP104: |
|
if (key_idx > 3) |
|
return -EINVAL; |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
switch (params->cipher) { |
|
case WLAN_CIPHER_SUITE_WEP40: |
|
if (params->key_len != WLAN_KEY_LEN_WEP40) |
|
return -EINVAL; |
|
break; |
|
case WLAN_CIPHER_SUITE_TKIP: |
|
if (params->key_len != WLAN_KEY_LEN_TKIP) |
|
return -EINVAL; |
|
break; |
|
case WLAN_CIPHER_SUITE_CCMP: |
|
if (params->key_len != WLAN_KEY_LEN_CCMP) |
|
return -EINVAL; |
|
break; |
|
case WLAN_CIPHER_SUITE_CCMP_256: |
|
if (params->key_len != WLAN_KEY_LEN_CCMP_256) |
|
return -EINVAL; |
|
break; |
|
case WLAN_CIPHER_SUITE_GCMP: |
|
if (params->key_len != WLAN_KEY_LEN_GCMP) |
|
return -EINVAL; |
|
break; |
|
case WLAN_CIPHER_SUITE_GCMP_256: |
|
if (params->key_len != WLAN_KEY_LEN_GCMP_256) |
|
return -EINVAL; |
|
break; |
|
case WLAN_CIPHER_SUITE_WEP104: |
|
if (params->key_len != WLAN_KEY_LEN_WEP104) |
|
return -EINVAL; |
|
break; |
|
case WLAN_CIPHER_SUITE_AES_CMAC: |
|
if (params->key_len != WLAN_KEY_LEN_AES_CMAC) |
|
return -EINVAL; |
|
break; |
|
case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
|
if (params->key_len != WLAN_KEY_LEN_BIP_CMAC_256) |
|
return -EINVAL; |
|
break; |
|
case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
|
if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_128) |
|
return -EINVAL; |
|
break; |
|
case WLAN_CIPHER_SUITE_BIP_GMAC_256: |
|
if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_256) |
|
return -EINVAL; |
|
break; |
|
default: |
|
/* |
|
* We don't know anything about this algorithm, |
|
* allow using it -- but the driver must check |
|
* all parameters! We still check below whether |
|
* or not the driver supports this algorithm, |
|
* of course. |
|
*/ |
|
break; |
|
} |
|
|
|
if (params->seq) { |
|
switch (params->cipher) { |
|
case WLAN_CIPHER_SUITE_WEP40: |
|
case WLAN_CIPHER_SUITE_WEP104: |
|
/* These ciphers do not use key sequence */ |
|
return -EINVAL; |
|
case WLAN_CIPHER_SUITE_TKIP: |
|
case WLAN_CIPHER_SUITE_CCMP: |
|
case WLAN_CIPHER_SUITE_CCMP_256: |
|
case WLAN_CIPHER_SUITE_GCMP: |
|
case WLAN_CIPHER_SUITE_GCMP_256: |
|
case WLAN_CIPHER_SUITE_AES_CMAC: |
|
case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
|
case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
|
case WLAN_CIPHER_SUITE_BIP_GMAC_256: |
|
if (params->seq_len != 6) |
|
return -EINVAL; |
|
break; |
|
} |
|
} |
|
|
|
if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher)) |
|
return -EINVAL; |
|
|
|
return 0; |
|
} |
|
|
|
unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc) |
|
{ |
|
unsigned int hdrlen = 24; |
|
|
|
if (ieee80211_is_ext(fc)) { |
|
hdrlen = 4; |
|
goto out; |
|
} |
|
|
|
if (ieee80211_is_data(fc)) { |
|
if (ieee80211_has_a4(fc)) |
|
hdrlen = 30; |
|
if (ieee80211_is_data_qos(fc)) { |
|
hdrlen += IEEE80211_QOS_CTL_LEN; |
|
if (ieee80211_has_order(fc)) |
|
hdrlen += IEEE80211_HT_CTL_LEN; |
|
} |
|
goto out; |
|
} |
|
|
|
if (ieee80211_is_mgmt(fc)) { |
|
if (ieee80211_has_order(fc)) |
|
hdrlen += IEEE80211_HT_CTL_LEN; |
|
goto out; |
|
} |
|
|
|
if (ieee80211_is_ctl(fc)) { |
|
/* |
|
* ACK and CTS are 10 bytes, all others 16. To see how |
|
* to get this condition consider |
|
* subtype mask: 0b0000000011110000 (0x00F0) |
|
* ACK subtype: 0b0000000011010000 (0x00D0) |
|
* CTS subtype: 0b0000000011000000 (0x00C0) |
|
* bits that matter: ^^^ (0x00E0) |
|
* value of those: 0b0000000011000000 (0x00C0) |
|
*/ |
|
if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) |
|
hdrlen = 10; |
|
else |
|
hdrlen = 16; |
|
} |
|
out: |
|
return hdrlen; |
|
} |
|
EXPORT_SYMBOL(ieee80211_hdrlen); |
|
|
|
unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) |
|
{ |
|
const struct ieee80211_hdr *hdr = |
|
(const struct ieee80211_hdr *)skb->data; |
|
unsigned int hdrlen; |
|
|
|
if (unlikely(skb->len < 10)) |
|
return 0; |
|
hdrlen = ieee80211_hdrlen(hdr->frame_control); |
|
if (unlikely(hdrlen > skb->len)) |
|
return 0; |
|
return hdrlen; |
|
} |
|
EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); |
|
|
|
static unsigned int __ieee80211_get_mesh_hdrlen(u8 flags) |
|
{ |
|
int ae = flags & MESH_FLAGS_AE; |
|
/* 802.11-2012, 8.2.4.7.3 */ |
|
switch (ae) { |
|
default: |
|
case 0: |
|
return 6; |
|
case MESH_FLAGS_AE_A4: |
|
return 12; |
|
case MESH_FLAGS_AE_A5_A6: |
|
return 18; |
|
} |
|
} |
|
|
|
unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) |
|
{ |
|
return __ieee80211_get_mesh_hdrlen(meshhdr->flags); |
|
} |
|
EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen); |
|
|
|
int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr, |
|
const u8 *addr, enum nl80211_iftype iftype, |
|
u8 data_offset, bool is_amsdu) |
|
{ |
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
|
struct { |
|
u8 hdr[ETH_ALEN] __aligned(2); |
|
__be16 proto; |
|
} payload; |
|
struct ethhdr tmp; |
|
u16 hdrlen; |
|
u8 mesh_flags = 0; |
|
|
|
if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
|
return -1; |
|
|
|
hdrlen = ieee80211_hdrlen(hdr->frame_control) + data_offset; |
|
if (skb->len < hdrlen + 8) |
|
return -1; |
|
|
|
/* convert IEEE 802.11 header + possible LLC headers into Ethernet |
|
* header |
|
* IEEE 802.11 address fields: |
|
* ToDS FromDS Addr1 Addr2 Addr3 Addr4 |
|
* 0 0 DA SA BSSID n/a |
|
* 0 1 DA BSSID SA n/a |
|
* 1 0 BSSID SA DA n/a |
|
* 1 1 RA TA DA SA |
|
*/ |
|
memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN); |
|
memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN); |
|
|
|
if (iftype == NL80211_IFTYPE_MESH_POINT) |
|
skb_copy_bits(skb, hdrlen, &mesh_flags, 1); |
|
|
|
mesh_flags &= MESH_FLAGS_AE; |
|
|
|
switch (hdr->frame_control & |
|
cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { |
|
case cpu_to_le16(IEEE80211_FCTL_TODS): |
|
if (unlikely(iftype != NL80211_IFTYPE_AP && |
|
iftype != NL80211_IFTYPE_AP_VLAN && |
|
iftype != NL80211_IFTYPE_P2P_GO)) |
|
return -1; |
|
break; |
|
case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): |
|
if (unlikely(iftype != NL80211_IFTYPE_MESH_POINT && |
|
iftype != NL80211_IFTYPE_AP_VLAN && |
|
iftype != NL80211_IFTYPE_STATION)) |
|
return -1; |
|
if (iftype == NL80211_IFTYPE_MESH_POINT) { |
|
if (mesh_flags == MESH_FLAGS_AE_A4) |
|
return -1; |
|
if (mesh_flags == MESH_FLAGS_AE_A5_A6) { |
|
skb_copy_bits(skb, hdrlen + |
|
offsetof(struct ieee80211s_hdr, eaddr1), |
|
tmp.h_dest, 2 * ETH_ALEN); |
|
} |
|
hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags); |
|
} |
|
break; |
|
case cpu_to_le16(IEEE80211_FCTL_FROMDS): |
|
if ((iftype != NL80211_IFTYPE_STATION && |
|
iftype != NL80211_IFTYPE_P2P_CLIENT && |
|
iftype != NL80211_IFTYPE_MESH_POINT) || |
|
(is_multicast_ether_addr(tmp.h_dest) && |
|
ether_addr_equal(tmp.h_source, addr))) |
|
return -1; |
|
if (iftype == NL80211_IFTYPE_MESH_POINT) { |
|
if (mesh_flags == MESH_FLAGS_AE_A5_A6) |
|
return -1; |
|
if (mesh_flags == MESH_FLAGS_AE_A4) |
|
skb_copy_bits(skb, hdrlen + |
|
offsetof(struct ieee80211s_hdr, eaddr1), |
|
tmp.h_source, ETH_ALEN); |
|
hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags); |
|
} |
|
break; |
|
case cpu_to_le16(0): |
|
if (iftype != NL80211_IFTYPE_ADHOC && |
|
iftype != NL80211_IFTYPE_STATION && |
|
iftype != NL80211_IFTYPE_OCB) |
|
return -1; |
|
break; |
|
} |
|
|
|
skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)); |
|
tmp.h_proto = payload.proto; |
|
|
|
if (likely((!is_amsdu && ether_addr_equal(payload.hdr, rfc1042_header) && |
|
tmp.h_proto != htons(ETH_P_AARP) && |
|
tmp.h_proto != htons(ETH_P_IPX)) || |
|
ether_addr_equal(payload.hdr, bridge_tunnel_header))) |
|
/* remove RFC1042 or Bridge-Tunnel encapsulation and |
|
* replace EtherType */ |
|
hdrlen += ETH_ALEN + 2; |
|
else |
|
tmp.h_proto = htons(skb->len - hdrlen); |
|
|
|
pskb_pull(skb, hdrlen); |
|
|
|
if (!ehdr) |
|
ehdr = skb_push(skb, sizeof(struct ethhdr)); |
|
memcpy(ehdr, &tmp, sizeof(tmp)); |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL(ieee80211_data_to_8023_exthdr); |
|
|
|
static void |
|
__frame_add_frag(struct sk_buff *skb, struct page *page, |
|
void *ptr, int len, int size) |
|
{ |
|
struct skb_shared_info *sh = skb_shinfo(skb); |
|
int page_offset; |
|
|
|
get_page(page); |
|
page_offset = ptr - page_address(page); |
|
skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size); |
|
} |
|
|
|
static void |
|
__ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame, |
|
int offset, int len) |
|
{ |
|
struct skb_shared_info *sh = skb_shinfo(skb); |
|
const skb_frag_t *frag = &sh->frags[0]; |
|
struct page *frag_page; |
|
void *frag_ptr; |
|
int frag_len, frag_size; |
|
int head_size = skb->len - skb->data_len; |
|
int cur_len; |
|
|
|
frag_page = virt_to_head_page(skb->head); |
|
frag_ptr = skb->data; |
|
frag_size = head_size; |
|
|
|
while (offset >= frag_size) { |
|
offset -= frag_size; |
|
frag_page = skb_frag_page(frag); |
|
frag_ptr = skb_frag_address(frag); |
|
frag_size = skb_frag_size(frag); |
|
frag++; |
|
} |
|
|
|
frag_ptr += offset; |
|
frag_len = frag_size - offset; |
|
|
|
cur_len = min(len, frag_len); |
|
|
|
__frame_add_frag(frame, frag_page, frag_ptr, cur_len, frag_size); |
|
len -= cur_len; |
|
|
|
while (len > 0) { |
|
frag_len = skb_frag_size(frag); |
|
cur_len = min(len, frag_len); |
|
__frame_add_frag(frame, skb_frag_page(frag), |
|
skb_frag_address(frag), cur_len, frag_len); |
|
len -= cur_len; |
|
frag++; |
|
} |
|
} |
|
|
|
static struct sk_buff * |
|
__ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen, |
|
int offset, int len, bool reuse_frag) |
|
{ |
|
struct sk_buff *frame; |
|
int cur_len = len; |
|
|
|
if (skb->len - offset < len) |
|
return NULL; |
|
|
|
/* |
|
* When reusing framents, copy some data to the head to simplify |
|
* ethernet header handling and speed up protocol header processing |
|
* in the stack later. |
|
*/ |
|
if (reuse_frag) |
|
cur_len = min_t(int, len, 32); |
|
|
|
/* |
|
* Allocate and reserve two bytes more for payload |
|
* alignment since sizeof(struct ethhdr) is 14. |
|
*/ |
|
frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + cur_len); |
|
if (!frame) |
|
return NULL; |
|
|
|
skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); |
|
skb_copy_bits(skb, offset, skb_put(frame, cur_len), cur_len); |
|
|
|
len -= cur_len; |
|
if (!len) |
|
return frame; |
|
|
|
offset += cur_len; |
|
__ieee80211_amsdu_copy_frag(skb, frame, offset, len); |
|
|
|
return frame; |
|
} |
|
|
|
void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list, |
|
const u8 *addr, enum nl80211_iftype iftype, |
|
const unsigned int extra_headroom, |
|
const u8 *check_da, const u8 *check_sa) |
|
{ |
|
unsigned int hlen = ALIGN(extra_headroom, 4); |
|
struct sk_buff *frame = NULL; |
|
u16 ethertype; |
|
u8 *payload; |
|
int offset = 0, remaining; |
|
struct ethhdr eth; |
|
bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb); |
|
bool reuse_skb = false; |
|
bool last = false; |
|
|
|
while (!last) { |
|
unsigned int subframe_len; |
|
int len; |
|
u8 padding; |
|
|
|
skb_copy_bits(skb, offset, ð, sizeof(eth)); |
|
len = ntohs(eth.h_proto); |
|
subframe_len = sizeof(struct ethhdr) + len; |
|
padding = (4 - subframe_len) & 0x3; |
|
|
|
/* the last MSDU has no padding */ |
|
remaining = skb->len - offset; |
|
if (subframe_len > remaining) |
|
goto purge; |
|
/* mitigate A-MSDU aggregation injection attacks */ |
|
if (ether_addr_equal(eth.h_dest, rfc1042_header)) |
|
goto purge; |
|
|
|
offset += sizeof(struct ethhdr); |
|
last = remaining <= subframe_len + padding; |
|
|
|
/* FIXME: should we really accept multicast DA? */ |
|
if ((check_da && !is_multicast_ether_addr(eth.h_dest) && |
|
!ether_addr_equal(check_da, eth.h_dest)) || |
|
(check_sa && !ether_addr_equal(check_sa, eth.h_source))) { |
|
offset += len + padding; |
|
continue; |
|
} |
|
|
|
/* reuse skb for the last subframe */ |
|
if (!skb_is_nonlinear(skb) && !reuse_frag && last) { |
|
skb_pull(skb, offset); |
|
frame = skb; |
|
reuse_skb = true; |
|
} else { |
|
frame = __ieee80211_amsdu_copy(skb, hlen, offset, len, |
|
reuse_frag); |
|
if (!frame) |
|
goto purge; |
|
|
|
offset += len + padding; |
|
} |
|
|
|
skb_reset_network_header(frame); |
|
frame->dev = skb->dev; |
|
frame->priority = skb->priority; |
|
|
|
payload = frame->data; |
|
ethertype = (payload[6] << 8) | payload[7]; |
|
if (likely((ether_addr_equal(payload, rfc1042_header) && |
|
ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
|
ether_addr_equal(payload, bridge_tunnel_header))) { |
|
eth.h_proto = htons(ethertype); |
|
skb_pull(frame, ETH_ALEN + 2); |
|
} |
|
|
|
memcpy(skb_push(frame, sizeof(eth)), ð, sizeof(eth)); |
|
__skb_queue_tail(list, frame); |
|
} |
|
|
|
if (!reuse_skb) |
|
dev_kfree_skb(skb); |
|
|
|
return; |
|
|
|
purge: |
|
__skb_queue_purge(list); |
|
dev_kfree_skb(skb); |
|
} |
|
EXPORT_SYMBOL(ieee80211_amsdu_to_8023s); |
|
|
|
/* Given a data frame determine the 802.1p/1d tag to use. */ |
|
unsigned int cfg80211_classify8021d(struct sk_buff *skb, |
|
struct cfg80211_qos_map *qos_map) |
|
{ |
|
unsigned int dscp; |
|
unsigned char vlan_priority; |
|
unsigned int ret; |
|
|
|
/* skb->priority values from 256->263 are magic values to |
|
* directly indicate a specific 802.1d priority. This is used |
|
* to allow 802.1d priority to be passed directly in from VLAN |
|
* tags, etc. |
|
*/ |
|
if (skb->priority >= 256 && skb->priority <= 263) { |
|
ret = skb->priority - 256; |
|
goto out; |
|
} |
|
|
|
if (skb_vlan_tag_present(skb)) { |
|
vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK) |
|
>> VLAN_PRIO_SHIFT; |
|
if (vlan_priority > 0) { |
|
ret = vlan_priority; |
|
goto out; |
|
} |
|
} |
|
|
|
switch (skb->protocol) { |
|
case htons(ETH_P_IP): |
|
dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc; |
|
break; |
|
case htons(ETH_P_IPV6): |
|
dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc; |
|
break; |
|
case htons(ETH_P_MPLS_UC): |
|
case htons(ETH_P_MPLS_MC): { |
|
struct mpls_label mpls_tmp, *mpls; |
|
|
|
mpls = skb_header_pointer(skb, sizeof(struct ethhdr), |
|
sizeof(*mpls), &mpls_tmp); |
|
if (!mpls) |
|
return 0; |
|
|
|
ret = (ntohl(mpls->entry) & MPLS_LS_TC_MASK) |
|
>> MPLS_LS_TC_SHIFT; |
|
goto out; |
|
} |
|
case htons(ETH_P_80221): |
|
/* 802.21 is always network control traffic */ |
|
return 7; |
|
default: |
|
return 0; |
|
} |
|
|
|
if (qos_map) { |
|
unsigned int i, tmp_dscp = dscp >> 2; |
|
|
|
for (i = 0; i < qos_map->num_des; i++) { |
|
if (tmp_dscp == qos_map->dscp_exception[i].dscp) { |
|
ret = qos_map->dscp_exception[i].up; |
|
goto out; |
|
} |
|
} |
|
|
|
for (i = 0; i < 8; i++) { |
|
if (tmp_dscp >= qos_map->up[i].low && |
|
tmp_dscp <= qos_map->up[i].high) { |
|
ret = i; |
|
goto out; |
|
} |
|
} |
|
} |
|
|
|
ret = dscp >> 5; |
|
out: |
|
return array_index_nospec(ret, IEEE80211_NUM_TIDS); |
|
} |
|
EXPORT_SYMBOL(cfg80211_classify8021d); |
|
|
|
const struct element *ieee80211_bss_get_elem(struct cfg80211_bss *bss, u8 id) |
|
{ |
|
const struct cfg80211_bss_ies *ies; |
|
|
|
ies = rcu_dereference(bss->ies); |
|
if (!ies) |
|
return NULL; |
|
|
|
return cfg80211_find_elem(id, ies->data, ies->len); |
|
} |
|
EXPORT_SYMBOL(ieee80211_bss_get_elem); |
|
|
|
void cfg80211_upload_connect_keys(struct wireless_dev *wdev) |
|
{ |
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
|
struct net_device *dev = wdev->netdev; |
|
int i; |
|
|
|
if (!wdev->connect_keys) |
|
return; |
|
|
|
for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++) { |
|
if (!wdev->connect_keys->params[i].cipher) |
|
continue; |
|
if (rdev_add_key(rdev, dev, i, false, NULL, |
|
&wdev->connect_keys->params[i])) { |
|
netdev_err(dev, "failed to set key %d\n", i); |
|
continue; |
|
} |
|
if (wdev->connect_keys->def == i && |
|
rdev_set_default_key(rdev, dev, i, true, true)) { |
|
netdev_err(dev, "failed to set defkey %d\n", i); |
|
continue; |
|
} |
|
} |
|
|
|
kfree_sensitive(wdev->connect_keys); |
|
wdev->connect_keys = NULL; |
|
} |
|
|
|
void cfg80211_process_wdev_events(struct wireless_dev *wdev) |
|
{ |
|
struct cfg80211_event *ev; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&wdev->event_lock, flags); |
|
while (!list_empty(&wdev->event_list)) { |
|
ev = list_first_entry(&wdev->event_list, |
|
struct cfg80211_event, list); |
|
list_del(&ev->list); |
|
spin_unlock_irqrestore(&wdev->event_lock, flags); |
|
|
|
wdev_lock(wdev); |
|
switch (ev->type) { |
|
case EVENT_CONNECT_RESULT: |
|
__cfg80211_connect_result( |
|
wdev->netdev, |
|
&ev->cr, |
|
ev->cr.status == WLAN_STATUS_SUCCESS); |
|
break; |
|
case EVENT_ROAMED: |
|
__cfg80211_roamed(wdev, &ev->rm); |
|
break; |
|
case EVENT_DISCONNECTED: |
|
__cfg80211_disconnected(wdev->netdev, |
|
ev->dc.ie, ev->dc.ie_len, |
|
ev->dc.reason, |
|
!ev->dc.locally_generated); |
|
break; |
|
case EVENT_IBSS_JOINED: |
|
__cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid, |
|
ev->ij.channel); |
|
break; |
|
case EVENT_STOPPED: |
|
__cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev); |
|
break; |
|
case EVENT_PORT_AUTHORIZED: |
|
__cfg80211_port_authorized(wdev, ev->pa.bssid); |
|
break; |
|
} |
|
wdev_unlock(wdev); |
|
|
|
kfree(ev); |
|
|
|
spin_lock_irqsave(&wdev->event_lock, flags); |
|
} |
|
spin_unlock_irqrestore(&wdev->event_lock, flags); |
|
} |
|
|
|
void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev) |
|
{ |
|
struct wireless_dev *wdev; |
|
|
|
lockdep_assert_held(&rdev->wiphy.mtx); |
|
|
|
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) |
|
cfg80211_process_wdev_events(wdev); |
|
} |
|
|
|
int cfg80211_change_iface(struct cfg80211_registered_device *rdev, |
|
struct net_device *dev, enum nl80211_iftype ntype, |
|
struct vif_params *params) |
|
{ |
|
int err; |
|
enum nl80211_iftype otype = dev->ieee80211_ptr->iftype; |
|
|
|
lockdep_assert_held(&rdev->wiphy.mtx); |
|
|
|
/* don't support changing VLANs, you just re-create them */ |
|
if (otype == NL80211_IFTYPE_AP_VLAN) |
|
return -EOPNOTSUPP; |
|
|
|
/* cannot change into P2P device or NAN */ |
|
if (ntype == NL80211_IFTYPE_P2P_DEVICE || |
|
ntype == NL80211_IFTYPE_NAN) |
|
return -EOPNOTSUPP; |
|
|
|
if (!rdev->ops->change_virtual_intf || |
|
!(rdev->wiphy.interface_modes & (1 << ntype))) |
|
return -EOPNOTSUPP; |
|
|
|
if (ntype != otype) { |
|
/* if it's part of a bridge, reject changing type to station/ibss */ |
|
if (netif_is_bridge_port(dev) && |
|
(ntype == NL80211_IFTYPE_ADHOC || |
|
ntype == NL80211_IFTYPE_STATION || |
|
ntype == NL80211_IFTYPE_P2P_CLIENT)) |
|
return -EBUSY; |
|
|
|
dev->ieee80211_ptr->use_4addr = false; |
|
dev->ieee80211_ptr->mesh_id_up_len = 0; |
|
wdev_lock(dev->ieee80211_ptr); |
|
rdev_set_qos_map(rdev, dev, NULL); |
|
wdev_unlock(dev->ieee80211_ptr); |
|
|
|
switch (otype) { |
|
case NL80211_IFTYPE_AP: |
|
case NL80211_IFTYPE_P2P_GO: |
|
cfg80211_stop_ap(rdev, dev, true); |
|
break; |
|
case NL80211_IFTYPE_ADHOC: |
|
cfg80211_leave_ibss(rdev, dev, false); |
|
break; |
|
case NL80211_IFTYPE_STATION: |
|
case NL80211_IFTYPE_P2P_CLIENT: |
|
wdev_lock(dev->ieee80211_ptr); |
|
cfg80211_disconnect(rdev, dev, |
|
WLAN_REASON_DEAUTH_LEAVING, true); |
|
wdev_unlock(dev->ieee80211_ptr); |
|
break; |
|
case NL80211_IFTYPE_MESH_POINT: |
|
/* mesh should be handled? */ |
|
break; |
|
case NL80211_IFTYPE_OCB: |
|
cfg80211_leave_ocb(rdev, dev); |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
cfg80211_process_rdev_events(rdev); |
|
cfg80211_mlme_purge_registrations(dev->ieee80211_ptr); |
|
} |
|
|
|
err = rdev_change_virtual_intf(rdev, dev, ntype, params); |
|
|
|
WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); |
|
|
|
if (!err && params && params->use_4addr != -1) |
|
dev->ieee80211_ptr->use_4addr = params->use_4addr; |
|
|
|
if (!err) { |
|
dev->priv_flags &= ~IFF_DONT_BRIDGE; |
|
switch (ntype) { |
|
case NL80211_IFTYPE_STATION: |
|
if (dev->ieee80211_ptr->use_4addr) |
|
break; |
|
fallthrough; |
|
case NL80211_IFTYPE_OCB: |
|
case NL80211_IFTYPE_P2P_CLIENT: |
|
case NL80211_IFTYPE_ADHOC: |
|
dev->priv_flags |= IFF_DONT_BRIDGE; |
|
break; |
|
case NL80211_IFTYPE_P2P_GO: |
|
case NL80211_IFTYPE_AP: |
|
case NL80211_IFTYPE_AP_VLAN: |
|
case NL80211_IFTYPE_MESH_POINT: |
|
/* bridging OK */ |
|
break; |
|
case NL80211_IFTYPE_MONITOR: |
|
/* monitor can't bridge anyway */ |
|
break; |
|
case NL80211_IFTYPE_UNSPECIFIED: |
|
case NUM_NL80211_IFTYPES: |
|
/* not happening */ |
|
break; |
|
case NL80211_IFTYPE_P2P_DEVICE: |
|
case NL80211_IFTYPE_WDS: |
|
case NL80211_IFTYPE_NAN: |
|
WARN_ON(1); |
|
break; |
|
} |
|
} |
|
|
|
if (!err && ntype != otype && netif_running(dev)) { |
|
cfg80211_update_iface_num(rdev, ntype, 1); |
|
cfg80211_update_iface_num(rdev, otype, -1); |
|
} |
|
|
|
return err; |
|
} |
|
|
|
static u32 cfg80211_calculate_bitrate_ht(struct rate_info *rate) |
|
{ |
|
int modulation, streams, bitrate; |
|
|
|
/* the formula below does only work for MCS values smaller than 32 */ |
|
if (WARN_ON_ONCE(rate->mcs >= 32)) |
|
return 0; |
|
|
|
modulation = rate->mcs & 7; |
|
streams = (rate->mcs >> 3) + 1; |
|
|
|
bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000; |
|
|
|
if (modulation < 4) |
|
bitrate *= (modulation + 1); |
|
else if (modulation == 4) |
|
bitrate *= (modulation + 2); |
|
else |
|
bitrate *= (modulation + 3); |
|
|
|
bitrate *= streams; |
|
|
|
if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) |
|
bitrate = (bitrate / 9) * 10; |
|
|
|
/* do NOT round down here */ |
|
return (bitrate + 50000) / 100000; |
|
} |
|
|
|
static u32 cfg80211_calculate_bitrate_dmg(struct rate_info *rate) |
|
{ |
|
static const u32 __mcs2bitrate[] = { |
|
/* control PHY */ |
|
[0] = 275, |
|
/* SC PHY */ |
|
[1] = 3850, |
|
[2] = 7700, |
|
[3] = 9625, |
|
[4] = 11550, |
|
[5] = 12512, /* 1251.25 mbps */ |
|
[6] = 15400, |
|
[7] = 19250, |
|
[8] = 23100, |
|
[9] = 25025, |
|
[10] = 30800, |
|
[11] = 38500, |
|
[12] = 46200, |
|
/* OFDM PHY */ |
|
[13] = 6930, |
|
[14] = 8662, /* 866.25 mbps */ |
|
[15] = 13860, |
|
[16] = 17325, |
|
[17] = 20790, |
|
[18] = 27720, |
|
[19] = 34650, |
|
[20] = 41580, |
|
[21] = 45045, |
|
[22] = 51975, |
|
[23] = 62370, |
|
[24] = 67568, /* 6756.75 mbps */ |
|
/* LP-SC PHY */ |
|
[25] = 6260, |
|
[26] = 8340, |
|
[27] = 11120, |
|
[28] = 12510, |
|
[29] = 16680, |
|
[30] = 22240, |
|
[31] = 25030, |
|
}; |
|
|
|
if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) |
|
return 0; |
|
|
|
return __mcs2bitrate[rate->mcs]; |
|
} |
|
|
|
static u32 cfg80211_calculate_bitrate_extended_sc_dmg(struct rate_info *rate) |
|
{ |
|
static const u32 __mcs2bitrate[] = { |
|
[6 - 6] = 26950, /* MCS 9.1 : 2695.0 mbps */ |
|
[7 - 6] = 50050, /* MCS 12.1 */ |
|
[8 - 6] = 53900, |
|
[9 - 6] = 57750, |
|
[10 - 6] = 63900, |
|
[11 - 6] = 75075, |
|
[12 - 6] = 80850, |
|
}; |
|
|
|
/* Extended SC MCS not defined for base MCS below 6 or above 12 */ |
|
if (WARN_ON_ONCE(rate->mcs < 6 || rate->mcs > 12)) |
|
return 0; |
|
|
|
return __mcs2bitrate[rate->mcs - 6]; |
|
} |
|
|
|
static u32 cfg80211_calculate_bitrate_edmg(struct rate_info *rate) |
|
{ |
|
static const u32 __mcs2bitrate[] = { |
|
/* control PHY */ |
|
[0] = 275, |
|
/* SC PHY */ |
|
[1] = 3850, |
|
[2] = 7700, |
|
[3] = 9625, |
|
[4] = 11550, |
|
[5] = 12512, /* 1251.25 mbps */ |
|
[6] = 13475, |
|
[7] = 15400, |
|
[8] = 19250, |
|
[9] = 23100, |
|
[10] = 25025, |
|
[11] = 26950, |
|
[12] = 30800, |
|
[13] = 38500, |
|
[14] = 46200, |
|
[15] = 50050, |
|
[16] = 53900, |
|
[17] = 57750, |
|
[18] = 69300, |
|
[19] = 75075, |
|
[20] = 80850, |
|
}; |
|
|
|
if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) |
|
return 0; |
|
|
|
return __mcs2bitrate[rate->mcs] * rate->n_bonded_ch; |
|
} |
|
|
|
static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate) |
|
{ |
|
static const u32 base[4][12] = { |
|
{ 6500000, |
|
13000000, |
|
19500000, |
|
26000000, |
|
39000000, |
|
52000000, |
|
58500000, |
|
65000000, |
|
78000000, |
|
/* not in the spec, but some devices use this: */ |
|
86700000, |
|
97500000, |
|
108300000, |
|
}, |
|
{ 13500000, |
|
27000000, |
|
40500000, |
|
54000000, |
|
81000000, |
|
108000000, |
|
121500000, |
|
135000000, |
|
162000000, |
|
180000000, |
|
202500000, |
|
225000000, |
|
}, |
|
{ 29300000, |
|
58500000, |
|
87800000, |
|
117000000, |
|
175500000, |
|
234000000, |
|
263300000, |
|
292500000, |
|
351000000, |
|
390000000, |
|
438800000, |
|
487500000, |
|
}, |
|
{ 58500000, |
|
117000000, |
|
175500000, |
|
234000000, |
|
351000000, |
|
468000000, |
|
526500000, |
|
585000000, |
|
702000000, |
|
780000000, |
|
877500000, |
|
975000000, |
|
}, |
|
}; |
|
u32 bitrate; |
|
int idx; |
|
|
|
if (rate->mcs > 11) |
|
goto warn; |
|
|
|
switch (rate->bw) { |
|
case RATE_INFO_BW_160: |
|
idx = 3; |
|
break; |
|
case RATE_INFO_BW_80: |
|
idx = 2; |
|
break; |
|
case RATE_INFO_BW_40: |
|
idx = 1; |
|
break; |
|
case RATE_INFO_BW_5: |
|
case RATE_INFO_BW_10: |
|
default: |
|
goto warn; |
|
case RATE_INFO_BW_20: |
|
idx = 0; |
|
} |
|
|
|
bitrate = base[idx][rate->mcs]; |
|
bitrate *= rate->nss; |
|
|
|
if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) |
|
bitrate = (bitrate / 9) * 10; |
|
|
|
/* do NOT round down here */ |
|
return (bitrate + 50000) / 100000; |
|
warn: |
|
WARN_ONCE(1, "invalid rate bw=%d, mcs=%d, nss=%d\n", |
|
rate->bw, rate->mcs, rate->nss); |
|
return 0; |
|
} |
|
|
|
static u32 cfg80211_calculate_bitrate_he(struct rate_info *rate) |
|
{ |
|
#define SCALE 6144 |
|
u32 mcs_divisors[14] = { |
|
102399, /* 16.666666... */ |
|
51201, /* 8.333333... */ |
|
34134, /* 5.555555... */ |
|
25599, /* 4.166666... */ |
|
17067, /* 2.777777... */ |
|
12801, /* 2.083333... */ |
|
11769, /* 1.851851... */ |
|
10239, /* 1.666666... */ |
|
8532, /* 1.388888... */ |
|
7680, /* 1.250000... */ |
|
6828, /* 1.111111... */ |
|
6144, /* 1.000000... */ |
|
5690, /* 0.926106... */ |
|
5120, /* 0.833333... */ |
|
}; |
|
u32 rates_160M[3] = { 960777777, 907400000, 816666666 }; |
|
u32 rates_969[3] = { 480388888, 453700000, 408333333 }; |
|
u32 rates_484[3] = { 229411111, 216666666, 195000000 }; |
|
u32 rates_242[3] = { 114711111, 108333333, 97500000 }; |
|
u32 rates_106[3] = { 40000000, 37777777, 34000000 }; |
|
u32 rates_52[3] = { 18820000, 17777777, 16000000 }; |
|
u32 rates_26[3] = { 9411111, 8888888, 8000000 }; |
|
u64 tmp; |
|
u32 result; |
|
|
|
if (WARN_ON_ONCE(rate->mcs > 13)) |
|
return 0; |
|
|
|
if (WARN_ON_ONCE(rate->he_gi > NL80211_RATE_INFO_HE_GI_3_2)) |
|
return 0; |
|
if (WARN_ON_ONCE(rate->he_ru_alloc > |
|
NL80211_RATE_INFO_HE_RU_ALLOC_2x996)) |
|
return 0; |
|
if (WARN_ON_ONCE(rate->nss < 1 || rate->nss > 8)) |
|
return 0; |
|
|
|
if (rate->bw == RATE_INFO_BW_160) |
|
result = rates_160M[rate->he_gi]; |
|
else if (rate->bw == RATE_INFO_BW_80 || |
|
(rate->bw == RATE_INFO_BW_HE_RU && |
|
rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_996)) |
|
result = rates_969[rate->he_gi]; |
|
else if (rate->bw == RATE_INFO_BW_40 || |
|
(rate->bw == RATE_INFO_BW_HE_RU && |
|
rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_484)) |
|
result = rates_484[rate->he_gi]; |
|
else if (rate->bw == RATE_INFO_BW_20 || |
|
(rate->bw == RATE_INFO_BW_HE_RU && |
|
rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_242)) |
|
result = rates_242[rate->he_gi]; |
|
else if (rate->bw == RATE_INFO_BW_HE_RU && |
|
rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_106) |
|
result = rates_106[rate->he_gi]; |
|
else if (rate->bw == RATE_INFO_BW_HE_RU && |
|
rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_52) |
|
result = rates_52[rate->he_gi]; |
|
else if (rate->bw == RATE_INFO_BW_HE_RU && |
|
rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_26) |
|
result = rates_26[rate->he_gi]; |
|
else { |
|
WARN(1, "invalid HE MCS: bw:%d, ru:%d\n", |
|
rate->bw, rate->he_ru_alloc); |
|
return 0; |
|
} |
|
|
|
/* now scale to the appropriate MCS */ |
|
tmp = result; |
|
tmp *= SCALE; |
|
do_div(tmp, mcs_divisors[rate->mcs]); |
|
result = tmp; |
|
|
|
/* and take NSS, DCM into account */ |
|
result = (result * rate->nss) / 8; |
|
if (rate->he_dcm) |
|
result /= 2; |
|
|
|
return result / 10000; |
|
} |
|
|
|
u32 cfg80211_calculate_bitrate(struct rate_info *rate) |
|
{ |
|
if (rate->flags & RATE_INFO_FLAGS_MCS) |
|
return cfg80211_calculate_bitrate_ht(rate); |
|
if (rate->flags & RATE_INFO_FLAGS_DMG) |
|
return cfg80211_calculate_bitrate_dmg(rate); |
|
if (rate->flags & RATE_INFO_FLAGS_EXTENDED_SC_DMG) |
|
return cfg80211_calculate_bitrate_extended_sc_dmg(rate); |
|
if (rate->flags & RATE_INFO_FLAGS_EDMG) |
|
return cfg80211_calculate_bitrate_edmg(rate); |
|
if (rate->flags & RATE_INFO_FLAGS_VHT_MCS) |
|
return cfg80211_calculate_bitrate_vht(rate); |
|
if (rate->flags & RATE_INFO_FLAGS_HE_MCS) |
|
return cfg80211_calculate_bitrate_he(rate); |
|
|
|
return rate->legacy; |
|
} |
|
EXPORT_SYMBOL(cfg80211_calculate_bitrate); |
|
|
|
int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len, |
|
enum ieee80211_p2p_attr_id attr, |
|
u8 *buf, unsigned int bufsize) |
|
{ |
|
u8 *out = buf; |
|
u16 attr_remaining = 0; |
|
bool desired_attr = false; |
|
u16 desired_len = 0; |
|
|
|
while (len > 0) { |
|
unsigned int iedatalen; |
|
unsigned int copy; |
|
const u8 *iedata; |
|
|
|
if (len < 2) |
|
return -EILSEQ; |
|
iedatalen = ies[1]; |
|
if (iedatalen + 2 > len) |
|
return -EILSEQ; |
|
|
|
if (ies[0] != WLAN_EID_VENDOR_SPECIFIC) |
|
goto cont; |
|
|
|
if (iedatalen < 4) |
|
goto cont; |
|
|
|
iedata = ies + 2; |
|
|
|
/* check WFA OUI, P2P subtype */ |
|
if (iedata[0] != 0x50 || iedata[1] != 0x6f || |
|
iedata[2] != 0x9a || iedata[3] != 0x09) |
|
goto cont; |
|
|
|
iedatalen -= 4; |
|
iedata += 4; |
|
|
|
/* check attribute continuation into this IE */ |
|
copy = min_t(unsigned int, attr_remaining, iedatalen); |
|
if (copy && desired_attr) { |
|
desired_len += copy; |
|
if (out) { |
|
memcpy(out, iedata, min(bufsize, copy)); |
|
out += min(bufsize, copy); |
|
bufsize -= min(bufsize, copy); |
|
} |
|
|
|
|
|
if (copy == attr_remaining) |
|
return desired_len; |
|
} |
|
|
|
attr_remaining -= copy; |
|
if (attr_remaining) |
|
goto cont; |
|
|
|
iedatalen -= copy; |
|
iedata += copy; |
|
|
|
while (iedatalen > 0) { |
|
u16 attr_len; |
|
|
|
/* P2P attribute ID & size must fit */ |
|
if (iedatalen < 3) |
|
return -EILSEQ; |
|
desired_attr = iedata[0] == attr; |
|
attr_len = get_unaligned_le16(iedata + 1); |
|
iedatalen -= 3; |
|
iedata += 3; |
|
|
|
copy = min_t(unsigned int, attr_len, iedatalen); |
|
|
|
if (desired_attr) { |
|
desired_len += copy; |
|
if (out) { |
|
memcpy(out, iedata, min(bufsize, copy)); |
|
out += min(bufsize, copy); |
|
bufsize -= min(bufsize, copy); |
|
} |
|
|
|
if (copy == attr_len) |
|
return desired_len; |
|
} |
|
|
|
iedata += copy; |
|
iedatalen -= copy; |
|
attr_remaining = attr_len - copy; |
|
} |
|
|
|
cont: |
|
len -= ies[1] + 2; |
|
ies += ies[1] + 2; |
|
} |
|
|
|
if (attr_remaining && desired_attr) |
|
return -EILSEQ; |
|
|
|
return -ENOENT; |
|
} |
|
EXPORT_SYMBOL(cfg80211_get_p2p_attr); |
|
|
|
static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id, bool id_ext) |
|
{ |
|
int i; |
|
|
|
/* Make sure array values are legal */ |
|
if (WARN_ON(ids[n_ids - 1] == WLAN_EID_EXTENSION)) |
|
return false; |
|
|
|
i = 0; |
|
while (i < n_ids) { |
|
if (ids[i] == WLAN_EID_EXTENSION) { |
|
if (id_ext && (ids[i + 1] == id)) |
|
return true; |
|
|
|
i += 2; |
|
continue; |
|
} |
|
|
|
if (ids[i] == id && !id_ext) |
|
return true; |
|
|
|
i++; |
|
} |
|
return false; |
|
} |
|
|
|
static size_t skip_ie(const u8 *ies, size_t ielen, size_t pos) |
|
{ |
|
/* we assume a validly formed IEs buffer */ |
|
u8 len = ies[pos + 1]; |
|
|
|
pos += 2 + len; |
|
|
|
/* the IE itself must have 255 bytes for fragments to follow */ |
|
if (len < 255) |
|
return pos; |
|
|
|
while (pos < ielen && ies[pos] == WLAN_EID_FRAGMENT) { |
|
len = ies[pos + 1]; |
|
pos += 2 + len; |
|
} |
|
|
|
return pos; |
|
} |
|
|
|
size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen, |
|
const u8 *ids, int n_ids, |
|
const u8 *after_ric, int n_after_ric, |
|
size_t offset) |
|
{ |
|
size_t pos = offset; |
|
|
|
while (pos < ielen) { |
|
u8 ext = 0; |
|
|
|
if (ies[pos] == WLAN_EID_EXTENSION) |
|
ext = 2; |
|
if ((pos + ext) >= ielen) |
|
break; |
|
|
|
if (!ieee80211_id_in_list(ids, n_ids, ies[pos + ext], |
|
ies[pos] == WLAN_EID_EXTENSION)) |
|
break; |
|
|
|
if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) { |
|
pos = skip_ie(ies, ielen, pos); |
|
|
|
while (pos < ielen) { |
|
if (ies[pos] == WLAN_EID_EXTENSION) |
|
ext = 2; |
|
else |
|
ext = 0; |
|
|
|
if ((pos + ext) >= ielen) |
|
break; |
|
|
|
if (!ieee80211_id_in_list(after_ric, |
|
n_after_ric, |
|
ies[pos + ext], |
|
ext == 2)) |
|
pos = skip_ie(ies, ielen, pos); |
|
else |
|
break; |
|
} |
|
} else { |
|
pos = skip_ie(ies, ielen, pos); |
|
} |
|
} |
|
|
|
return pos; |
|
} |
|
EXPORT_SYMBOL(ieee80211_ie_split_ric); |
|
|
|
bool ieee80211_operating_class_to_band(u8 operating_class, |
|
enum nl80211_band *band) |
|
{ |
|
switch (operating_class) { |
|
case 112: |
|
case 115 ... 127: |
|
case 128 ... 130: |
|
*band = NL80211_BAND_5GHZ; |
|
return true; |
|
case 131 ... 135: |
|
*band = NL80211_BAND_6GHZ; |
|
return true; |
|
case 81: |
|
case 82: |
|
case 83: |
|
case 84: |
|
*band = NL80211_BAND_2GHZ; |
|
return true; |
|
case 180: |
|
*band = NL80211_BAND_60GHZ; |
|
return true; |
|
} |
|
|
|
return false; |
|
} |
|
EXPORT_SYMBOL(ieee80211_operating_class_to_band); |
|
|
|
bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef, |
|
u8 *op_class) |
|
{ |
|
u8 vht_opclass; |
|
u32 freq = chandef->center_freq1; |
|
|
|
if (freq >= 2412 && freq <= 2472) { |
|
if (chandef->width > NL80211_CHAN_WIDTH_40) |
|
return false; |
|
|
|
/* 2.407 GHz, channels 1..13 */ |
|
if (chandef->width == NL80211_CHAN_WIDTH_40) { |
|
if (freq > chandef->chan->center_freq) |
|
*op_class = 83; /* HT40+ */ |
|
else |
|
*op_class = 84; /* HT40- */ |
|
} else { |
|
*op_class = 81; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
if (freq == 2484) { |
|
/* channel 14 is only for IEEE 802.11b */ |
|
if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT) |
|
return false; |
|
|
|
*op_class = 82; /* channel 14 */ |
|
return true; |
|
} |
|
|
|
switch (chandef->width) { |
|
case NL80211_CHAN_WIDTH_80: |
|
vht_opclass = 128; |
|
break; |
|
case NL80211_CHAN_WIDTH_160: |
|
vht_opclass = 129; |
|
break; |
|
case NL80211_CHAN_WIDTH_80P80: |
|
vht_opclass = 130; |
|
break; |
|
case NL80211_CHAN_WIDTH_10: |
|
case NL80211_CHAN_WIDTH_5: |
|
return false; /* unsupported for now */ |
|
default: |
|
vht_opclass = 0; |
|
break; |
|
} |
|
|
|
/* 5 GHz, channels 36..48 */ |
|
if (freq >= 5180 && freq <= 5240) { |
|
if (vht_opclass) { |
|
*op_class = vht_opclass; |
|
} else if (chandef->width == NL80211_CHAN_WIDTH_40) { |
|
if (freq > chandef->chan->center_freq) |
|
*op_class = 116; |
|
else |
|
*op_class = 117; |
|
} else { |
|
*op_class = 115; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
/* 5 GHz, channels 52..64 */ |
|
if (freq >= 5260 && freq <= 5320) { |
|
if (vht_opclass) { |
|
*op_class = vht_opclass; |
|
} else if (chandef->width == NL80211_CHAN_WIDTH_40) { |
|
if (freq > chandef->chan->center_freq) |
|
*op_class = 119; |
|
else |
|
*op_class = 120; |
|
} else { |
|
*op_class = 118; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
/* 5 GHz, channels 100..144 */ |
|
if (freq >= 5500 && freq <= 5720) { |
|
if (vht_opclass) { |
|
*op_class = vht_opclass; |
|
} else if (chandef->width == NL80211_CHAN_WIDTH_40) { |
|
if (freq > chandef->chan->center_freq) |
|
*op_class = 122; |
|
else |
|
*op_class = 123; |
|
} else { |
|
*op_class = 121; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
/* 5 GHz, channels 149..169 */ |
|
if (freq >= 5745 && freq <= 5845) { |
|
if (vht_opclass) { |
|
*op_class = vht_opclass; |
|
} else if (chandef->width == NL80211_CHAN_WIDTH_40) { |
|
if (freq > chandef->chan->center_freq) |
|
*op_class = 126; |
|
else |
|
*op_class = 127; |
|
} else if (freq <= 5805) { |
|
*op_class = 124; |
|
} else { |
|
*op_class = 125; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
/* 56.16 GHz, channel 1..4 */ |
|
if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 6) { |
|
if (chandef->width >= NL80211_CHAN_WIDTH_40) |
|
return false; |
|
|
|
*op_class = 180; |
|
return true; |
|
} |
|
|
|
/* not supported yet */ |
|
return false; |
|
} |
|
EXPORT_SYMBOL(ieee80211_chandef_to_operating_class); |
|
|
|
static void cfg80211_calculate_bi_data(struct wiphy *wiphy, u32 new_beacon_int, |
|
u32 *beacon_int_gcd, |
|
bool *beacon_int_different) |
|
{ |
|
struct wireless_dev *wdev; |
|
|
|
*beacon_int_gcd = 0; |
|
*beacon_int_different = false; |
|
|
|
list_for_each_entry(wdev, &wiphy->wdev_list, list) { |
|
if (!wdev->beacon_interval) |
|
continue; |
|
|
|
if (!*beacon_int_gcd) { |
|
*beacon_int_gcd = wdev->beacon_interval; |
|
continue; |
|
} |
|
|
|
if (wdev->beacon_interval == *beacon_int_gcd) |
|
continue; |
|
|
|
*beacon_int_different = true; |
|
*beacon_int_gcd = gcd(*beacon_int_gcd, wdev->beacon_interval); |
|
} |
|
|
|
if (new_beacon_int && *beacon_int_gcd != new_beacon_int) { |
|
if (*beacon_int_gcd) |
|
*beacon_int_different = true; |
|
*beacon_int_gcd = gcd(*beacon_int_gcd, new_beacon_int); |
|
} |
|
} |
|
|
|
int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, |
|
enum nl80211_iftype iftype, u32 beacon_int) |
|
{ |
|
/* |
|
* This is just a basic pre-condition check; if interface combinations |
|
* are possible the driver must already be checking those with a call |
|
* to cfg80211_check_combinations(), in which case we'll validate more |
|
* through the cfg80211_calculate_bi_data() call and code in |
|
* cfg80211_iter_combinations(). |
|
*/ |
|
|
|
if (beacon_int < 10 || beacon_int > 10000) |
|
return -EINVAL; |
|
|
|
return 0; |
|
} |
|
|
|
int cfg80211_iter_combinations(struct wiphy *wiphy, |
|
struct iface_combination_params *params, |
|
void (*iter)(const struct ieee80211_iface_combination *c, |
|
void *data), |
|
void *data) |
|
{ |
|
const struct ieee80211_regdomain *regdom; |
|
enum nl80211_dfs_regions region = 0; |
|
int i, j, iftype; |
|
int num_interfaces = 0; |
|
u32 used_iftypes = 0; |
|
u32 beacon_int_gcd; |
|
bool beacon_int_different; |
|
|
|
/* |
|
* This is a bit strange, since the iteration used to rely only on |
|
* the data given by the driver, but here it now relies on context, |
|
* in form of the currently operating interfaces. |
|
* This is OK for all current users, and saves us from having to |
|
* push the GCD calculations into all the drivers. |
|
* In the future, this should probably rely more on data that's in |
|
* cfg80211 already - the only thing not would appear to be any new |
|
* interfaces (while being brought up) and channel/radar data. |
|
*/ |
|
cfg80211_calculate_bi_data(wiphy, params->new_beacon_int, |
|
&beacon_int_gcd, &beacon_int_different); |
|
|
|
if (params->radar_detect) { |
|
rcu_read_lock(); |
|
regdom = rcu_dereference(cfg80211_regdomain); |
|
if (regdom) |
|
region = regdom->dfs_region; |
|
rcu_read_unlock(); |
|
} |
|
|
|
for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { |
|
num_interfaces += params->iftype_num[iftype]; |
|
if (params->iftype_num[iftype] > 0 && |
|
!cfg80211_iftype_allowed(wiphy, iftype, 0, 1)) |
|
used_iftypes |= BIT(iftype); |
|
} |
|
|
|
for (i = 0; i < wiphy->n_iface_combinations; i++) { |
|
const struct ieee80211_iface_combination *c; |
|
struct ieee80211_iface_limit *limits; |
|
u32 all_iftypes = 0; |
|
|
|
c = &wiphy->iface_combinations[i]; |
|
|
|
if (num_interfaces > c->max_interfaces) |
|
continue; |
|
if (params->num_different_channels > c->num_different_channels) |
|
continue; |
|
|
|
limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits, |
|
GFP_KERNEL); |
|
if (!limits) |
|
return -ENOMEM; |
|
|
|
for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { |
|
if (cfg80211_iftype_allowed(wiphy, iftype, 0, 1)) |
|
continue; |
|
for (j = 0; j < c->n_limits; j++) { |
|
all_iftypes |= limits[j].types; |
|
if (!(limits[j].types & BIT(iftype))) |
|
continue; |
|
if (limits[j].max < params->iftype_num[iftype]) |
|
goto cont; |
|
limits[j].max -= params->iftype_num[iftype]; |
|
} |
|
} |
|
|
|
if (params->radar_detect != |
|
(c->radar_detect_widths & params->radar_detect)) |
|
goto cont; |
|
|
|
if (params->radar_detect && c->radar_detect_regions && |
|
!(c->radar_detect_regions & BIT(region))) |
|
goto cont; |
|
|
|
/* Finally check that all iftypes that we're currently |
|
* using are actually part of this combination. If they |
|
* aren't then we can't use this combination and have |
|
* to continue to the next. |
|
*/ |
|
if ((all_iftypes & used_iftypes) != used_iftypes) |
|
goto cont; |
|
|
|
if (beacon_int_gcd) { |
|
if (c->beacon_int_min_gcd && |
|
beacon_int_gcd < c->beacon_int_min_gcd) |
|
goto cont; |
|
if (!c->beacon_int_min_gcd && beacon_int_different) |
|
goto cont; |
|
} |
|
|
|
/* This combination covered all interface types and |
|
* supported the requested numbers, so we're good. |
|
*/ |
|
|
|
(*iter)(c, data); |
|
cont: |
|
kfree(limits); |
|
} |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL(cfg80211_iter_combinations); |
|
|
|
static void |
|
cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c, |
|
void *data) |
|
{ |
|
int *num = data; |
|
(*num)++; |
|
} |
|
|
|
int cfg80211_check_combinations(struct wiphy *wiphy, |
|
struct iface_combination_params *params) |
|
{ |
|
int err, num = 0; |
|
|
|
err = cfg80211_iter_combinations(wiphy, params, |
|
cfg80211_iter_sum_ifcombs, &num); |
|
if (err) |
|
return err; |
|
if (num == 0) |
|
return -EBUSY; |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL(cfg80211_check_combinations); |
|
|
|
int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, |
|
const u8 *rates, unsigned int n_rates, |
|
u32 *mask) |
|
{ |
|
int i, j; |
|
|
|
if (!sband) |
|
return -EINVAL; |
|
|
|
if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES) |
|
return -EINVAL; |
|
|
|
*mask = 0; |
|
|
|
for (i = 0; i < n_rates; i++) { |
|
int rate = (rates[i] & 0x7f) * 5; |
|
bool found = false; |
|
|
|
for (j = 0; j < sband->n_bitrates; j++) { |
|
if (sband->bitrates[j].bitrate == rate) { |
|
found = true; |
|
*mask |= BIT(j); |
|
break; |
|
} |
|
} |
|
if (!found) |
|
return -EINVAL; |
|
} |
|
|
|
/* |
|
* mask must have at least one bit set here since we |
|
* didn't accept a 0-length rates array nor allowed |
|
* entries in the array that didn't exist |
|
*/ |
|
|
|
return 0; |
|
} |
|
|
|
unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy) |
|
{ |
|
enum nl80211_band band; |
|
unsigned int n_channels = 0; |
|
|
|
for (band = 0; band < NUM_NL80211_BANDS; band++) |
|
if (wiphy->bands[band]) |
|
n_channels += wiphy->bands[band]->n_channels; |
|
|
|
return n_channels; |
|
} |
|
EXPORT_SYMBOL(ieee80211_get_num_supported_channels); |
|
|
|
int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr, |
|
struct station_info *sinfo) |
|
{ |
|
struct cfg80211_registered_device *rdev; |
|
struct wireless_dev *wdev; |
|
|
|
wdev = dev->ieee80211_ptr; |
|
if (!wdev) |
|
return -EOPNOTSUPP; |
|
|
|
rdev = wiphy_to_rdev(wdev->wiphy); |
|
if (!rdev->ops->get_station) |
|
return -EOPNOTSUPP; |
|
|
|
memset(sinfo, 0, sizeof(*sinfo)); |
|
|
|
return rdev_get_station(rdev, dev, mac_addr, sinfo); |
|
} |
|
EXPORT_SYMBOL(cfg80211_get_station); |
|
|
|
void cfg80211_free_nan_func(struct cfg80211_nan_func *f) |
|
{ |
|
int i; |
|
|
|
if (!f) |
|
return; |
|
|
|
kfree(f->serv_spec_info); |
|
kfree(f->srf_bf); |
|
kfree(f->srf_macs); |
|
for (i = 0; i < f->num_rx_filters; i++) |
|
kfree(f->rx_filters[i].filter); |
|
|
|
for (i = 0; i < f->num_tx_filters; i++) |
|
kfree(f->tx_filters[i].filter); |
|
|
|
kfree(f->rx_filters); |
|
kfree(f->tx_filters); |
|
kfree(f); |
|
} |
|
EXPORT_SYMBOL(cfg80211_free_nan_func); |
|
|
|
bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, |
|
u32 center_freq_khz, u32 bw_khz) |
|
{ |
|
u32 start_freq_khz, end_freq_khz; |
|
|
|
start_freq_khz = center_freq_khz - (bw_khz / 2); |
|
end_freq_khz = center_freq_khz + (bw_khz / 2); |
|
|
|
if (start_freq_khz >= freq_range->start_freq_khz && |
|
end_freq_khz <= freq_range->end_freq_khz) |
|
return true; |
|
|
|
return false; |
|
} |
|
|
|
int cfg80211_sinfo_alloc_tid_stats(struct station_info *sinfo, gfp_t gfp) |
|
{ |
|
sinfo->pertid = kcalloc(IEEE80211_NUM_TIDS + 1, |
|
sizeof(*(sinfo->pertid)), |
|
gfp); |
|
if (!sinfo->pertid) |
|
return -ENOMEM; |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL(cfg80211_sinfo_alloc_tid_stats); |
|
|
|
/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
|
/* Ethernet-II snap header (RFC1042 for most EtherTypes) */ |
|
const unsigned char rfc1042_header[] __aligned(2) = |
|
{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; |
|
EXPORT_SYMBOL(rfc1042_header); |
|
|
|
/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ |
|
const unsigned char bridge_tunnel_header[] __aligned(2) = |
|
{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; |
|
EXPORT_SYMBOL(bridge_tunnel_header); |
|
|
|
/* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */ |
|
struct iapp_layer2_update { |
|
u8 da[ETH_ALEN]; /* broadcast */ |
|
u8 sa[ETH_ALEN]; /* STA addr */ |
|
__be16 len; /* 6 */ |
|
u8 dsap; /* 0 */ |
|
u8 ssap; /* 0 */ |
|
u8 control; |
|
u8 xid_info[3]; |
|
} __packed; |
|
|
|
void cfg80211_send_layer2_update(struct net_device *dev, const u8 *addr) |
|
{ |
|
struct iapp_layer2_update *msg; |
|
struct sk_buff *skb; |
|
|
|
/* Send Level 2 Update Frame to update forwarding tables in layer 2 |
|
* bridge devices */ |
|
|
|
skb = dev_alloc_skb(sizeof(*msg)); |
|
if (!skb) |
|
return; |
|
msg = skb_put(skb, sizeof(*msg)); |
|
|
|
/* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID) |
|
* Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */ |
|
|
|
eth_broadcast_addr(msg->da); |
|
ether_addr_copy(msg->sa, addr); |
|
msg->len = htons(6); |
|
msg->dsap = 0; |
|
msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */ |
|
msg->control = 0xaf; /* XID response lsb.1111F101. |
|
* F=0 (no poll command; unsolicited frame) */ |
|
msg->xid_info[0] = 0x81; /* XID format identifier */ |
|
msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */ |
|
msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */ |
|
|
|
skb->dev = dev; |
|
skb->protocol = eth_type_trans(skb, dev); |
|
memset(skb->cb, 0, sizeof(skb->cb)); |
|
netif_rx_ni(skb); |
|
} |
|
EXPORT_SYMBOL(cfg80211_send_layer2_update); |
|
|
|
int ieee80211_get_vht_max_nss(struct ieee80211_vht_cap *cap, |
|
enum ieee80211_vht_chanwidth bw, |
|
int mcs, bool ext_nss_bw_capable, |
|
unsigned int max_vht_nss) |
|
{ |
|
u16 map = le16_to_cpu(cap->supp_mcs.rx_mcs_map); |
|
int ext_nss_bw; |
|
int supp_width; |
|
int i, mcs_encoding; |
|
|
|
if (map == 0xffff) |
|
return 0; |
|
|
|
if (WARN_ON(mcs > 9 || max_vht_nss > 8)) |
|
return 0; |
|
if (mcs <= 7) |
|
mcs_encoding = 0; |
|
else if (mcs == 8) |
|
mcs_encoding = 1; |
|
else |
|
mcs_encoding = 2; |
|
|
|
if (!max_vht_nss) { |
|
/* find max_vht_nss for the given MCS */ |
|
for (i = 7; i >= 0; i--) { |
|
int supp = (map >> (2 * i)) & 3; |
|
|
|
if (supp == 3) |
|
continue; |
|
|
|
if (supp >= mcs_encoding) { |
|
max_vht_nss = i + 1; |
|
break; |
|
} |
|
} |
|
} |
|
|
|
if (!(cap->supp_mcs.tx_mcs_map & |
|
cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE))) |
|
return max_vht_nss; |
|
|
|
ext_nss_bw = le32_get_bits(cap->vht_cap_info, |
|
IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); |
|
supp_width = le32_get_bits(cap->vht_cap_info, |
|
IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK); |
|
|
|
/* if not capable, treat ext_nss_bw as 0 */ |
|
if (!ext_nss_bw_capable) |
|
ext_nss_bw = 0; |
|
|
|
/* This is invalid */ |
|
if (supp_width == 3) |
|
return 0; |
|
|
|
/* This is an invalid combination so pretend nothing is supported */ |
|
if (supp_width == 2 && (ext_nss_bw == 1 || ext_nss_bw == 2)) |
|
return 0; |
|
|
|
/* |
|
* Cover all the special cases according to IEEE 802.11-2016 |
|
* Table 9-250. All other cases are either factor of 1 or not |
|
* valid/supported. |
|
*/ |
|
switch (bw) { |
|
case IEEE80211_VHT_CHANWIDTH_USE_HT: |
|
case IEEE80211_VHT_CHANWIDTH_80MHZ: |
|
if ((supp_width == 1 || supp_width == 2) && |
|
ext_nss_bw == 3) |
|
return 2 * max_vht_nss; |
|
break; |
|
case IEEE80211_VHT_CHANWIDTH_160MHZ: |
|
if (supp_width == 0 && |
|
(ext_nss_bw == 1 || ext_nss_bw == 2)) |
|
return max_vht_nss / 2; |
|
if (supp_width == 0 && |
|
ext_nss_bw == 3) |
|
return (3 * max_vht_nss) / 4; |
|
if (supp_width == 1 && |
|
ext_nss_bw == 3) |
|
return 2 * max_vht_nss; |
|
break; |
|
case IEEE80211_VHT_CHANWIDTH_80P80MHZ: |
|
if (supp_width == 0 && ext_nss_bw == 1) |
|
return 0; /* not possible */ |
|
if (supp_width == 0 && |
|
ext_nss_bw == 2) |
|
return max_vht_nss / 2; |
|
if (supp_width == 0 && |
|
ext_nss_bw == 3) |
|
return (3 * max_vht_nss) / 4; |
|
if (supp_width == 1 && |
|
ext_nss_bw == 0) |
|
return 0; /* not possible */ |
|
if (supp_width == 1 && |
|
ext_nss_bw == 1) |
|
return max_vht_nss / 2; |
|
if (supp_width == 1 && |
|
ext_nss_bw == 2) |
|
return (3 * max_vht_nss) / 4; |
|
break; |
|
} |
|
|
|
/* not covered or invalid combination received */ |
|
return max_vht_nss; |
|
} |
|
EXPORT_SYMBOL(ieee80211_get_vht_max_nss); |
|
|
|
bool cfg80211_iftype_allowed(struct wiphy *wiphy, enum nl80211_iftype iftype, |
|
bool is_4addr, u8 check_swif) |
|
|
|
{ |
|
bool is_vlan = iftype == NL80211_IFTYPE_AP_VLAN; |
|
|
|
switch (check_swif) { |
|
case 0: |
|
if (is_vlan && is_4addr) |
|
return wiphy->flags & WIPHY_FLAG_4ADDR_AP; |
|
return wiphy->interface_modes & BIT(iftype); |
|
case 1: |
|
if (!(wiphy->software_iftypes & BIT(iftype)) && is_vlan) |
|
return wiphy->flags & WIPHY_FLAG_4ADDR_AP; |
|
return wiphy->software_iftypes & BIT(iftype); |
|
default: |
|
break; |
|
} |
|
|
|
return false; |
|
} |
|
EXPORT_SYMBOL(cfg80211_iftype_allowed);
|
|
|