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![Felix Fietkau](/assets/img/avatar_default.png)
Fix ethernet header length field after stripping the mesh header
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/all/CT5GNZSK28AI.2K6M69OXM9RW5@syracuse/
Fixes: 986e43b19a
("wifi: mac80211: fix receiving A-MSDU frames on mesh interfaces")
Reported-and-tested-by: Nicolas Escande <nico.escande@gmail.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20230711115052.68430-1-nbd@nbd.name
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2708 lines
64 KiB
C
2708 lines
64 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Wireless utility functions
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*
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* Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net>
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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) 2018-2023 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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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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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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return result;
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}
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EXPORT_SYMBOL(ieee80211_get_response_rate);
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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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if (WARN_ON(!sband))
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return 1;
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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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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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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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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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/*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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pr_err("unknown channel width for channel at %dKHz?\n",
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ieee80211_channel_to_khz(chan));
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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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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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/* 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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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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if (!sband)
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continue;
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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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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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return NULL;
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}
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EXPORT_SYMBOL(ieee80211_get_channel_khz);
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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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void ieee80211_set_bitrate_flags(struct wiphy *wiphy)
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{
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enum nl80211_band band;
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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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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,
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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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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:
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/* Extended Key ID can only be used with CCMP/GCMP ciphers */
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if ((pairwise && key_idx) ||
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params->mode != NL80211_KEY_RX_TX)
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return -EINVAL;
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break;
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case WLAN_CIPHER_SUITE_CCMP:
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case WLAN_CIPHER_SUITE_CCMP_256:
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case WLAN_CIPHER_SUITE_GCMP:
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case WLAN_CIPHER_SUITE_GCMP_256:
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/* IEEE802.11-2016 allows only 0 and - when supporting
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* Extended Key ID - 1 as index for pairwise keys.
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* @NL80211_KEY_NO_TX is only allowed for pairwise keys when
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* the driver supports Extended Key ID.
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* @NL80211_KEY_SET_TX can't be set when installing and
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* validating a key.
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*/
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if ((params->mode == NL80211_KEY_NO_TX && !pairwise) ||
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params->mode == NL80211_KEY_SET_TX)
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return -EINVAL;
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if (wiphy_ext_feature_isset(&rdev->wiphy,
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NL80211_EXT_FEATURE_EXT_KEY_ID)) {
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if (pairwise && (key_idx < 0 || key_idx > 1))
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return -EINVAL;
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} else if (pairwise && key_idx) {
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return -EINVAL;
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}
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break;
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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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/* Disallow BIP (group-only) cipher as pairwise cipher */
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if (pairwise)
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return -EINVAL;
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if (key_idx < 4)
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return -EINVAL;
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break;
|
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case WLAN_CIPHER_SUITE_WEP40:
|
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case WLAN_CIPHER_SUITE_WEP104:
|
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if (key_idx > 3)
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return -EINVAL;
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break;
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default:
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break;
|
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}
|
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|
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switch (params->cipher) {
|
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case WLAN_CIPHER_SUITE_WEP40:
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if (params->key_len != WLAN_KEY_LEN_WEP40)
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return -EINVAL;
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break;
|
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case WLAN_CIPHER_SUITE_TKIP:
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if (params->key_len != WLAN_KEY_LEN_TKIP)
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return -EINVAL;
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break;
|
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case WLAN_CIPHER_SUITE_CCMP:
|
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if (params->key_len != WLAN_KEY_LEN_CCMP)
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return -EINVAL;
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break;
|
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case WLAN_CIPHER_SUITE_CCMP_256:
|
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if (params->key_len != WLAN_KEY_LEN_CCMP_256)
|
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return -EINVAL;
|
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break;
|
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case WLAN_CIPHER_SUITE_GCMP:
|
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if (params->key_len != WLAN_KEY_LEN_GCMP)
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return -EINVAL;
|
|
break;
|
|
case WLAN_CIPHER_SUITE_GCMP_256:
|
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if (params->key_len != WLAN_KEY_LEN_GCMP_256)
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|
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);
|
|
|
|
bool ieee80211_get_8023_tunnel_proto(const void *hdr, __be16 *proto)
|
|
{
|
|
const __be16 *hdr_proto = hdr + ETH_ALEN;
|
|
|
|
if (!(ether_addr_equal(hdr, rfc1042_header) &&
|
|
*hdr_proto != htons(ETH_P_AARP) &&
|
|
*hdr_proto != htons(ETH_P_IPX)) &&
|
|
!ether_addr_equal(hdr, bridge_tunnel_header))
|
|
return false;
|
|
|
|
*proto = *hdr_proto;
|
|
|
|
return true;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_get_8023_tunnel_proto);
|
|
|
|
int ieee80211_strip_8023_mesh_hdr(struct sk_buff *skb)
|
|
{
|
|
const void *mesh_addr;
|
|
struct {
|
|
struct ethhdr eth;
|
|
u8 flags;
|
|
} payload;
|
|
int hdrlen;
|
|
int ret;
|
|
|
|
ret = skb_copy_bits(skb, 0, &payload, sizeof(payload));
|
|
if (ret)
|
|
return ret;
|
|
|
|
hdrlen = sizeof(payload.eth) + __ieee80211_get_mesh_hdrlen(payload.flags);
|
|
|
|
if (likely(pskb_may_pull(skb, hdrlen + 8) &&
|
|
ieee80211_get_8023_tunnel_proto(skb->data + hdrlen,
|
|
&payload.eth.h_proto)))
|
|
hdrlen += ETH_ALEN + 2;
|
|
else if (!pskb_may_pull(skb, hdrlen))
|
|
return -EINVAL;
|
|
else
|
|
payload.eth.h_proto = htons(skb->len - hdrlen);
|
|
|
|
mesh_addr = skb->data + sizeof(payload.eth) + ETH_ALEN;
|
|
switch (payload.flags & MESH_FLAGS_AE) {
|
|
case MESH_FLAGS_AE_A4:
|
|
memcpy(&payload.eth.h_source, mesh_addr, ETH_ALEN);
|
|
break;
|
|
case MESH_FLAGS_AE_A5_A6:
|
|
memcpy(&payload.eth, mesh_addr, 2 * ETH_ALEN);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
pskb_pull(skb, hdrlen - sizeof(payload.eth));
|
|
memcpy(skb->data, &payload.eth, sizeof(payload.eth));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_strip_8023_mesh_hdr);
|
|
|
|
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;
|
|
|
|
if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
|
|
return -1;
|
|
|
|
hdrlen = ieee80211_hdrlen(hdr->frame_control) + data_offset;
|
|
if (skb->len < hdrlen)
|
|
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);
|
|
|
|
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;
|
|
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;
|
|
break;
|
|
case cpu_to_le16(0):
|
|
if (iftype != NL80211_IFTYPE_ADHOC &&
|
|
iftype != NL80211_IFTYPE_STATION &&
|
|
iftype != NL80211_IFTYPE_OCB)
|
|
return -1;
|
|
break;
|
|
}
|
|
|
|
if (likely(!is_amsdu && iftype != NL80211_IFTYPE_MESH_POINT &&
|
|
skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)) == 0 &&
|
|
ieee80211_get_8023_tunnel_proto(&payload, &tmp.h_proto))) {
|
|
/* remove RFC1042 or Bridge-Tunnel encapsulation */
|
|
hdrlen += ETH_ALEN + 2;
|
|
skb_postpull_rcsum(skb, &payload, 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,
|
|
int min_len)
|
|
{
|
|
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, min_len);
|
|
|
|
/*
|
|
* 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;
|
|
|
|
frame->priority = skb->priority;
|
|
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;
|
|
}
|
|
|
|
static u16
|
|
ieee80211_amsdu_subframe_length(void *field, u8 mesh_flags, u8 hdr_type)
|
|
{
|
|
__le16 *field_le = field;
|
|
__be16 *field_be = field;
|
|
u16 len;
|
|
|
|
if (hdr_type >= 2)
|
|
len = le16_to_cpu(*field_le);
|
|
else
|
|
len = be16_to_cpu(*field_be);
|
|
if (hdr_type)
|
|
len += __ieee80211_get_mesh_hdrlen(mesh_flags);
|
|
|
|
return len;
|
|
}
|
|
|
|
bool ieee80211_is_valid_amsdu(struct sk_buff *skb, u8 mesh_hdr)
|
|
{
|
|
int offset = 0, remaining, subframe_len, padding;
|
|
|
|
for (offset = 0; offset < skb->len; offset += subframe_len + padding) {
|
|
struct {
|
|
__be16 len;
|
|
u8 mesh_flags;
|
|
} hdr;
|
|
u16 len;
|
|
|
|
if (skb_copy_bits(skb, offset + 2 * ETH_ALEN, &hdr, sizeof(hdr)) < 0)
|
|
return false;
|
|
|
|
len = ieee80211_amsdu_subframe_length(&hdr.len, hdr.mesh_flags,
|
|
mesh_hdr);
|
|
subframe_len = sizeof(struct ethhdr) + len;
|
|
padding = (4 - subframe_len) & 0x3;
|
|
remaining = skb->len - offset;
|
|
|
|
if (subframe_len > remaining)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_is_valid_amsdu);
|
|
|
|
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,
|
|
u8 mesh_control)
|
|
{
|
|
unsigned int hlen = ALIGN(extra_headroom, 4);
|
|
struct sk_buff *frame = NULL;
|
|
int offset = 0, remaining;
|
|
struct {
|
|
struct ethhdr eth;
|
|
uint8_t flags;
|
|
} hdr;
|
|
bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb);
|
|
bool reuse_skb = false;
|
|
bool last = false;
|
|
int copy_len = sizeof(hdr.eth);
|
|
|
|
if (iftype == NL80211_IFTYPE_MESH_POINT)
|
|
copy_len = sizeof(hdr);
|
|
|
|
while (!last) {
|
|
unsigned int subframe_len;
|
|
int len, mesh_len = 0;
|
|
u8 padding;
|
|
|
|
skb_copy_bits(skb, offset, &hdr, copy_len);
|
|
if (iftype == NL80211_IFTYPE_MESH_POINT)
|
|
mesh_len = __ieee80211_get_mesh_hdrlen(hdr.flags);
|
|
len = ieee80211_amsdu_subframe_length(&hdr.eth.h_proto, hdr.flags,
|
|
mesh_control);
|
|
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(hdr.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(hdr.eth.h_dest) &&
|
|
!ether_addr_equal(check_da, hdr.eth.h_dest)) ||
|
|
(check_sa && !ether_addr_equal(check_sa, hdr.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, 32 + mesh_len);
|
|
if (!frame)
|
|
goto purge;
|
|
|
|
offset += len + padding;
|
|
}
|
|
|
|
skb_reset_network_header(frame);
|
|
frame->dev = skb->dev;
|
|
frame->priority = skb->priority;
|
|
|
|
if (likely(iftype != NL80211_IFTYPE_MESH_POINT &&
|
|
ieee80211_get_8023_tunnel_proto(frame->data, &hdr.eth.h_proto)))
|
|
skb_pull(frame, ETH_ALEN + 2);
|
|
|
|
memcpy(skb_push(frame, sizeof(hdr.eth)), &hdr.eth, sizeof(hdr.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 < 4; i++) {
|
|
if (!wdev->connect_keys->params[i].cipher)
|
|
continue;
|
|
if (rdev_add_key(rdev, dev, -1, 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, -1, 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,
|
|
ev->pa.td_bitmap,
|
|
ev->pa.td_bitmap_len);
|
|
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;
|
|
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, -1, 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);
|
|
|
|
memset(&dev->ieee80211_ptr->u, 0,
|
|
sizeof(dev->ieee80211_ptr->u));
|
|
memset(&dev->ieee80211_ptr->links, 0,
|
|
sizeof(dev->ieee80211_ptr->links));
|
|
}
|
|
|
|
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... */
|
|
11377, /* 1.851725... */
|
|
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;
|
|
}
|
|
|
|
static u32 cfg80211_calculate_bitrate_eht(struct rate_info *rate)
|
|
{
|
|
#define SCALE 6144
|
|
static const u32 mcs_divisors[16] = {
|
|
102399, /* 16.666666... */
|
|
51201, /* 8.333333... */
|
|
34134, /* 5.555555... */
|
|
25599, /* 4.166666... */
|
|
17067, /* 2.777777... */
|
|
12801, /* 2.083333... */
|
|
11377, /* 1.851725... */
|
|
10239, /* 1.666666... */
|
|
8532, /* 1.388888... */
|
|
7680, /* 1.250000... */
|
|
6828, /* 1.111111... */
|
|
6144, /* 1.000000... */
|
|
5690, /* 0.926106... */
|
|
5120, /* 0.833333... */
|
|
409600, /* 66.666666... */
|
|
204800, /* 33.333333... */
|
|
};
|
|
static const u32 rates_996[3] = { 480388888, 453700000, 408333333 };
|
|
static const u32 rates_484[3] = { 229411111, 216666666, 195000000 };
|
|
static const u32 rates_242[3] = { 114711111, 108333333, 97500000 };
|
|
static const u32 rates_106[3] = { 40000000, 37777777, 34000000 };
|
|
static const u32 rates_52[3] = { 18820000, 17777777, 16000000 };
|
|
static const u32 rates_26[3] = { 9411111, 8888888, 8000000 };
|
|
u64 tmp;
|
|
u32 result;
|
|
|
|
if (WARN_ON_ONCE(rate->mcs > 15))
|
|
return 0;
|
|
if (WARN_ON_ONCE(rate->eht_gi > NL80211_RATE_INFO_EHT_GI_3_2))
|
|
return 0;
|
|
if (WARN_ON_ONCE(rate->eht_ru_alloc >
|
|
NL80211_RATE_INFO_EHT_RU_ALLOC_4x996))
|
|
return 0;
|
|
if (WARN_ON_ONCE(rate->nss < 1 || rate->nss > 8))
|
|
return 0;
|
|
|
|
/* Bandwidth checks for MCS 14 */
|
|
if (rate->mcs == 14) {
|
|
if ((rate->bw != RATE_INFO_BW_EHT_RU &&
|
|
rate->bw != RATE_INFO_BW_80 &&
|
|
rate->bw != RATE_INFO_BW_160 &&
|
|
rate->bw != RATE_INFO_BW_320) ||
|
|
(rate->bw == RATE_INFO_BW_EHT_RU &&
|
|
rate->eht_ru_alloc != NL80211_RATE_INFO_EHT_RU_ALLOC_996 &&
|
|
rate->eht_ru_alloc != NL80211_RATE_INFO_EHT_RU_ALLOC_2x996 &&
|
|
rate->eht_ru_alloc != NL80211_RATE_INFO_EHT_RU_ALLOC_4x996)) {
|
|
WARN(1, "invalid EHT BW for MCS 14: bw:%d, ru:%d\n",
|
|
rate->bw, rate->eht_ru_alloc);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (rate->bw == RATE_INFO_BW_320 ||
|
|
(rate->bw == RATE_INFO_BW_EHT_RU &&
|
|
rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_4x996))
|
|
result = 4 * rates_996[rate->eht_gi];
|
|
else if (rate->bw == RATE_INFO_BW_EHT_RU &&
|
|
rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_3x996P484)
|
|
result = 3 * rates_996[rate->eht_gi] + rates_484[rate->eht_gi];
|
|
else if (rate->bw == RATE_INFO_BW_EHT_RU &&
|
|
rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_3x996)
|
|
result = 3 * rates_996[rate->eht_gi];
|
|
else if (rate->bw == RATE_INFO_BW_EHT_RU &&
|
|
rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_2x996P484)
|
|
result = 2 * rates_996[rate->eht_gi] + rates_484[rate->eht_gi];
|
|
else if (rate->bw == RATE_INFO_BW_160 ||
|
|
(rate->bw == RATE_INFO_BW_EHT_RU &&
|
|
rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_2x996))
|
|
result = 2 * rates_996[rate->eht_gi];
|
|
else if (rate->bw == RATE_INFO_BW_EHT_RU &&
|
|
rate->eht_ru_alloc ==
|
|
NL80211_RATE_INFO_EHT_RU_ALLOC_996P484P242)
|
|
result = rates_996[rate->eht_gi] + rates_484[rate->eht_gi]
|
|
+ rates_242[rate->eht_gi];
|
|
else if (rate->bw == RATE_INFO_BW_EHT_RU &&
|
|
rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_996P484)
|
|
result = rates_996[rate->eht_gi] + rates_484[rate->eht_gi];
|
|
else if (rate->bw == RATE_INFO_BW_80 ||
|
|
(rate->bw == RATE_INFO_BW_EHT_RU &&
|
|
rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_996))
|
|
result = rates_996[rate->eht_gi];
|
|
else if (rate->bw == RATE_INFO_BW_EHT_RU &&
|
|
rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_484P242)
|
|
result = rates_484[rate->eht_gi] + rates_242[rate->eht_gi];
|
|
else if (rate->bw == RATE_INFO_BW_40 ||
|
|
(rate->bw == RATE_INFO_BW_EHT_RU &&
|
|
rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_484))
|
|
result = rates_484[rate->eht_gi];
|
|
else if (rate->bw == RATE_INFO_BW_20 ||
|
|
(rate->bw == RATE_INFO_BW_EHT_RU &&
|
|
rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_242))
|
|
result = rates_242[rate->eht_gi];
|
|
else if (rate->bw == RATE_INFO_BW_EHT_RU &&
|
|
rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_106P26)
|
|
result = rates_106[rate->eht_gi] + rates_26[rate->eht_gi];
|
|
else if (rate->bw == RATE_INFO_BW_EHT_RU &&
|
|
rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_106)
|
|
result = rates_106[rate->eht_gi];
|
|
else if (rate->bw == RATE_INFO_BW_EHT_RU &&
|
|
rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_52P26)
|
|
result = rates_52[rate->eht_gi] + rates_26[rate->eht_gi];
|
|
else if (rate->bw == RATE_INFO_BW_EHT_RU &&
|
|
rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_52)
|
|
result = rates_52[rate->eht_gi];
|
|
else if (rate->bw == RATE_INFO_BW_EHT_RU &&
|
|
rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_26)
|
|
result = rates_26[rate->eht_gi];
|
|
else {
|
|
WARN(1, "invalid EHT MCS: bw:%d, ru:%d\n",
|
|
rate->bw, rate->eht_ru_alloc);
|
|
return 0;
|
|
}
|
|
|
|
/* now scale to the appropriate MCS */
|
|
tmp = result;
|
|
tmp *= SCALE;
|
|
do_div(tmp, mcs_divisors[rate->mcs]);
|
|
|
|
/* and take NSS */
|
|
tmp *= rate->nss;
|
|
do_div(tmp, 8);
|
|
|
|
result = tmp;
|
|
|
|
return result / 10000;
|
|
}
|
|
|
|
static u32 cfg80211_calculate_bitrate_s1g(struct rate_info *rate)
|
|
{
|
|
/* For 1, 2, 4, 8 and 16 MHz channels */
|
|
static const u32 base[5][11] = {
|
|
{ 300000,
|
|
600000,
|
|
900000,
|
|
1200000,
|
|
1800000,
|
|
2400000,
|
|
2700000,
|
|
3000000,
|
|
3600000,
|
|
4000000,
|
|
/* MCS 10 supported in 1 MHz only */
|
|
150000,
|
|
},
|
|
{ 650000,
|
|
1300000,
|
|
1950000,
|
|
2600000,
|
|
3900000,
|
|
5200000,
|
|
5850000,
|
|
6500000,
|
|
7800000,
|
|
/* MCS 9 not valid */
|
|
},
|
|
{ 1350000,
|
|
2700000,
|
|
4050000,
|
|
5400000,
|
|
8100000,
|
|
10800000,
|
|
12150000,
|
|
13500000,
|
|
16200000,
|
|
18000000,
|
|
},
|
|
{ 2925000,
|
|
5850000,
|
|
8775000,
|
|
11700000,
|
|
17550000,
|
|
23400000,
|
|
26325000,
|
|
29250000,
|
|
35100000,
|
|
39000000,
|
|
},
|
|
{ 8580000,
|
|
11700000,
|
|
17550000,
|
|
23400000,
|
|
35100000,
|
|
46800000,
|
|
52650000,
|
|
58500000,
|
|
70200000,
|
|
78000000,
|
|
},
|
|
};
|
|
u32 bitrate;
|
|
/* default is 1 MHz index */
|
|
int idx = 0;
|
|
|
|
if (rate->mcs >= 11)
|
|
goto warn;
|
|
|
|
switch (rate->bw) {
|
|
case RATE_INFO_BW_16:
|
|
idx = 4;
|
|
break;
|
|
case RATE_INFO_BW_8:
|
|
idx = 3;
|
|
break;
|
|
case RATE_INFO_BW_4:
|
|
idx = 2;
|
|
break;
|
|
case RATE_INFO_BW_2:
|
|
idx = 1;
|
|
break;
|
|
case RATE_INFO_BW_1:
|
|
idx = 0;
|
|
break;
|
|
case RATE_INFO_BW_5:
|
|
case RATE_INFO_BW_10:
|
|
case RATE_INFO_BW_20:
|
|
case RATE_INFO_BW_40:
|
|
case RATE_INFO_BW_80:
|
|
case RATE_INFO_BW_160:
|
|
default:
|
|
goto warn;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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);
|
|
if (rate->flags & RATE_INFO_FLAGS_EHT_MCS)
|
|
return cfg80211_calculate_bitrate_eht(rate);
|
|
if (rate->flags & RATE_INFO_FLAGS_S1G_MCS)
|
|
return cfg80211_calculate_bitrate_s1g(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 int cfg80211_wdev_bi(struct wireless_dev *wdev)
|
|
{
|
|
switch (wdev->iftype) {
|
|
case NL80211_IFTYPE_AP:
|
|
case NL80211_IFTYPE_P2P_GO:
|
|
WARN_ON(wdev->valid_links);
|
|
return wdev->links[0].ap.beacon_interval;
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
return wdev->u.mesh.beacon_interval;
|
|
case NL80211_IFTYPE_ADHOC:
|
|
return wdev->u.ibss.beacon_interval;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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) {
|
|
int wdev_bi;
|
|
|
|
/* this feature isn't supported with MLO */
|
|
if (wdev->valid_links)
|
|
continue;
|
|
|
|
wdev_bi = cfg80211_wdev_bi(wdev);
|
|
|
|
if (!wdev_bi)
|
|
continue;
|
|
|
|
if (!*beacon_int_gcd) {
|
|
*beacon_int_gcd = wdev_bi;
|
|
continue;
|
|
}
|
|
|
|
if (wdev_bi == *beacon_int_gcd)
|
|
continue;
|
|
|
|
*beacon_int_different = true;
|
|
*beacon_int_gcd = gcd(*beacon_int_gcd, wdev_bi);
|
|
}
|
|
|
|
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(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);
|
|
|
|
void cfg80211_remove_link(struct wireless_dev *wdev, unsigned int link_id)
|
|
{
|
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
|
|
|
|
ASSERT_WDEV_LOCK(wdev);
|
|
|
|
switch (wdev->iftype) {
|
|
case NL80211_IFTYPE_AP:
|
|
case NL80211_IFTYPE_P2P_GO:
|
|
__cfg80211_stop_ap(rdev, wdev->netdev, link_id, true);
|
|
break;
|
|
default:
|
|
/* per-link not relevant */
|
|
break;
|
|
}
|
|
|
|
wdev->valid_links &= ~BIT(link_id);
|
|
|
|
rdev_del_intf_link(rdev, wdev, link_id);
|
|
|
|
eth_zero_addr(wdev->links[link_id].addr);
|
|
}
|
|
|
|
void cfg80211_remove_links(struct wireless_dev *wdev)
|
|
{
|
|
unsigned int link_id;
|
|
|
|
/*
|
|
* links are controlled by upper layers (userspace/cfg)
|
|
* only for AP mode, so only remove them here for AP
|
|
*/
|
|
if (wdev->iftype != NL80211_IFTYPE_AP)
|
|
return;
|
|
|
|
wdev_lock(wdev);
|
|
if (wdev->valid_links) {
|
|
for_each_valid_link(wdev, link_id)
|
|
cfg80211_remove_link(wdev, link_id);
|
|
}
|
|
wdev_unlock(wdev);
|
|
}
|
|
|
|
int cfg80211_remove_virtual_intf(struct cfg80211_registered_device *rdev,
|
|
struct wireless_dev *wdev)
|
|
{
|
|
cfg80211_remove_links(wdev);
|
|
|
|
return rdev_del_virtual_intf(rdev, wdev);
|
|
}
|
|
|
|
const struct wiphy_iftype_ext_capab *
|
|
cfg80211_get_iftype_ext_capa(struct wiphy *wiphy, enum nl80211_iftype type)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < wiphy->num_iftype_ext_capab; i++) {
|
|
if (wiphy->iftype_ext_capab[i].iftype == type)
|
|
return &wiphy->iftype_ext_capab[i];
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(cfg80211_get_iftype_ext_capa);
|