![Zhao, Gang](/assets/img/avatar_default.png)
Name wiphy_to_rdev is more accurate to describe what the function does, i.e., return a pointer pointing to struct cfg80211_registered_device. Signed-off-by: Zhao, Gang <gamerh2o@gmail.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
1541 lines
37 KiB
C
1541 lines
37 KiB
C
/*
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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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*/
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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 <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 "core.h"
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#include "rdev-ops.h"
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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 == IEEE80211_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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int ieee80211_channel_to_frequency(int chan, enum ieee80211_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 IEEE80211_BAND_2GHZ:
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if (chan == 14)
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return 2484;
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else if (chan < 14)
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return 2407 + chan * 5;
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break;
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case IEEE80211_BAND_5GHZ:
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if (chan >= 182 && chan <= 196)
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return 4000 + chan * 5;
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else
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return 5000 + chan * 5;
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break;
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case IEEE80211_BAND_60GHZ:
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if (chan < 5)
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return 56160 + chan * 2160;
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break;
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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_frequency);
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int ieee80211_frequency_to_channel(int 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 <= 45000) /* DMG band lower limit */
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return (freq - 5000) / 5;
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else if (freq >= 58320 && freq <= 64800)
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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_frequency_to_channel);
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struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy,
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int freq)
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{
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enum ieee80211_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 < IEEE80211_NUM_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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if (sband->channels[i].center_freq == freq)
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return &sband->channels[i];
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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);
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static void set_mandatory_flags_band(struct ieee80211_supported_band *sband,
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enum ieee80211_band band)
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{
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int i, want;
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switch (band) {
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case IEEE80211_BAND_5GHZ:
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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 IEEE80211_BAND_2GHZ:
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want = 7;
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for (i = 0; i < sband->n_bitrates; i++) {
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if (sband->bitrates[i].bitrate == 10) {
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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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}
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if (sband->bitrates[i].bitrate == 20 ||
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sband->bitrates[i].bitrate == 55 ||
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sband->bitrates[i].bitrate == 110 ||
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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_G;
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want--;
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}
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if (sband->bitrates[i].bitrate != 10 &&
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sband->bitrates[i].bitrate != 20 &&
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sband->bitrates[i].bitrate != 55 &&
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sband->bitrates[i].bitrate != 110)
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sband->bitrates[i].flags |=
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IEEE80211_RATE_ERP_G;
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}
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WARN_ON(want != 0 && want != 3 && want != 6);
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break;
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case IEEE80211_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 IEEE80211_NUM_BANDS:
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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 ieee80211_band band;
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for (band = 0; band < IEEE80211_NUM_BANDS; band++)
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if (wiphy->bands[band])
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set_mandatory_flags_band(wiphy->bands[band], 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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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 (key_idx > 5)
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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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/*
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* Disallow pairwise keys with non-zero index unless it's WEP
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* or a vendor specific cipher (because current deployments use
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* pairwise WEP keys with non-zero indices and for vendor specific
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* ciphers this should be validated in the driver or hardware level
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* - but 802.11i clearly specifies to use zero)
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*/
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if (pairwise && key_idx &&
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((params->cipher == WLAN_CIPHER_SUITE_TKIP) ||
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(params->cipher == WLAN_CIPHER_SUITE_CCMP) ||
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(params->cipher == WLAN_CIPHER_SUITE_AES_CMAC)))
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return -EINVAL;
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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_WEP104:
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if (params->key_len != WLAN_KEY_LEN_WEP104)
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return -EINVAL;
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break;
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case WLAN_CIPHER_SUITE_AES_CMAC:
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if (params->key_len != WLAN_KEY_LEN_AES_CMAC)
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return -EINVAL;
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break;
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default:
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/*
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* We don't know anything about this algorithm,
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* allow using it -- but the driver must check
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* all parameters! We still check below whether
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* or not the driver supports this algorithm,
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* of course.
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*/
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break;
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}
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if (params->seq) {
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switch (params->cipher) {
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case WLAN_CIPHER_SUITE_WEP40:
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case WLAN_CIPHER_SUITE_WEP104:
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/* These ciphers do not use key sequence */
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return -EINVAL;
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case WLAN_CIPHER_SUITE_TKIP:
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case WLAN_CIPHER_SUITE_CCMP:
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case WLAN_CIPHER_SUITE_AES_CMAC:
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if (params->seq_len != 6)
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return -EINVAL;
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break;
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}
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}
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if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher))
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return -EINVAL;
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return 0;
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}
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unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc)
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{
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unsigned int hdrlen = 24;
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if (ieee80211_is_data(fc)) {
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if (ieee80211_has_a4(fc))
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hdrlen = 30;
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if (ieee80211_is_data_qos(fc)) {
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hdrlen += IEEE80211_QOS_CTL_LEN;
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if (ieee80211_has_order(fc))
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hdrlen += IEEE80211_HT_CTL_LEN;
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}
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goto out;
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}
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if (ieee80211_is_ctl(fc)) {
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/*
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* ACK and CTS are 10 bytes, all others 16. To see how
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* to get this condition consider
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* subtype mask: 0b0000000011110000 (0x00F0)
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* ACK subtype: 0b0000000011010000 (0x00D0)
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* CTS subtype: 0b0000000011000000 (0x00C0)
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* bits that matter: ^^^ (0x00E0)
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* value of those: 0b0000000011000000 (0x00C0)
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*/
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if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
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hdrlen = 10;
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else
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hdrlen = 16;
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}
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out:
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return hdrlen;
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}
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EXPORT_SYMBOL(ieee80211_hdrlen);
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unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
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{
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const struct ieee80211_hdr *hdr =
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(const struct ieee80211_hdr *)skb->data;
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unsigned int hdrlen;
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if (unlikely(skb->len < 10))
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return 0;
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hdrlen = ieee80211_hdrlen(hdr->frame_control);
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if (unlikely(hdrlen > skb->len))
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return 0;
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return hdrlen;
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}
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EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
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unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
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{
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int ae = meshhdr->flags & MESH_FLAGS_AE;
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/* 802.11-2012, 8.2.4.7.3 */
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switch (ae) {
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default:
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case 0:
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return 6;
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case MESH_FLAGS_AE_A4:
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return 12;
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case MESH_FLAGS_AE_A5_A6:
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return 18;
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}
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}
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EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen);
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int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr,
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enum nl80211_iftype iftype)
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{
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
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u16 hdrlen, ethertype;
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u8 *payload;
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u8 dst[ETH_ALEN];
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u8 src[ETH_ALEN] __aligned(2);
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if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
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return -1;
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hdrlen = ieee80211_hdrlen(hdr->frame_control);
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/* convert IEEE 802.11 header + possible LLC headers into Ethernet
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* header
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* IEEE 802.11 address fields:
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* ToDS FromDS Addr1 Addr2 Addr3 Addr4
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* 0 0 DA SA BSSID n/a
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* 0 1 DA BSSID SA n/a
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* 1 0 BSSID SA DA n/a
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* 1 1 RA TA DA SA
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*/
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memcpy(dst, ieee80211_get_DA(hdr), ETH_ALEN);
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memcpy(src, ieee80211_get_SA(hdr), ETH_ALEN);
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switch (hdr->frame_control &
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cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
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case cpu_to_le16(IEEE80211_FCTL_TODS):
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if (unlikely(iftype != NL80211_IFTYPE_AP &&
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iftype != NL80211_IFTYPE_AP_VLAN &&
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iftype != NL80211_IFTYPE_P2P_GO))
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return -1;
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break;
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case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
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if (unlikely(iftype != NL80211_IFTYPE_WDS &&
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iftype != NL80211_IFTYPE_MESH_POINT &&
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iftype != NL80211_IFTYPE_AP_VLAN &&
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iftype != NL80211_IFTYPE_STATION))
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return -1;
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if (iftype == NL80211_IFTYPE_MESH_POINT) {
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struct ieee80211s_hdr *meshdr =
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(struct ieee80211s_hdr *) (skb->data + hdrlen);
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/* make sure meshdr->flags is on the linear part */
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if (!pskb_may_pull(skb, hdrlen + 1))
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return -1;
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if (meshdr->flags & MESH_FLAGS_AE_A4)
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return -1;
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if (meshdr->flags & MESH_FLAGS_AE_A5_A6) {
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skb_copy_bits(skb, hdrlen +
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offsetof(struct ieee80211s_hdr, eaddr1),
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dst, ETH_ALEN);
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skb_copy_bits(skb, hdrlen +
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offsetof(struct ieee80211s_hdr, eaddr2),
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src, ETH_ALEN);
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}
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hdrlen += ieee80211_get_mesh_hdrlen(meshdr);
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}
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break;
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case cpu_to_le16(IEEE80211_FCTL_FROMDS):
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if ((iftype != NL80211_IFTYPE_STATION &&
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iftype != NL80211_IFTYPE_P2P_CLIENT &&
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iftype != NL80211_IFTYPE_MESH_POINT) ||
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(is_multicast_ether_addr(dst) &&
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ether_addr_equal(src, addr)))
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return -1;
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if (iftype == NL80211_IFTYPE_MESH_POINT) {
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struct ieee80211s_hdr *meshdr =
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(struct ieee80211s_hdr *) (skb->data + hdrlen);
|
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/* make sure meshdr->flags is on the linear part */
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if (!pskb_may_pull(skb, hdrlen + 1))
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return -1;
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if (meshdr->flags & MESH_FLAGS_AE_A5_A6)
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return -1;
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if (meshdr->flags & MESH_FLAGS_AE_A4)
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skb_copy_bits(skb, hdrlen +
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offsetof(struct ieee80211s_hdr, eaddr1),
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src, ETH_ALEN);
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hdrlen += ieee80211_get_mesh_hdrlen(meshdr);
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}
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break;
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case cpu_to_le16(0):
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if (iftype != NL80211_IFTYPE_ADHOC &&
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iftype != NL80211_IFTYPE_STATION)
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return -1;
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break;
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}
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|
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if (!pskb_may_pull(skb, hdrlen + 8))
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return -1;
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payload = skb->data + hdrlen;
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ethertype = (payload[6] << 8) | payload[7];
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|
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if (likely((ether_addr_equal(payload, rfc1042_header) &&
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ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
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ether_addr_equal(payload, bridge_tunnel_header))) {
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/* remove RFC1042 or Bridge-Tunnel encapsulation and
|
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* replace EtherType */
|
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skb_pull(skb, hdrlen + 6);
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memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
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memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
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} else {
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struct ethhdr *ehdr;
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__be16 len;
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|
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skb_pull(skb, hdrlen);
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len = htons(skb->len);
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ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr));
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memcpy(ehdr->h_dest, dst, ETH_ALEN);
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memcpy(ehdr->h_source, src, ETH_ALEN);
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ehdr->h_proto = len;
|
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}
|
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return 0;
|
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}
|
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EXPORT_SYMBOL(ieee80211_data_to_8023);
|
|
|
|
int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr,
|
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enum nl80211_iftype iftype, u8 *bssid, bool qos)
|
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{
|
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struct ieee80211_hdr hdr;
|
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u16 hdrlen, ethertype;
|
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__le16 fc;
|
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const u8 *encaps_data;
|
|
int encaps_len, skip_header_bytes;
|
|
int nh_pos, h_pos;
|
|
int head_need;
|
|
|
|
if (unlikely(skb->len < ETH_HLEN))
|
|
return -EINVAL;
|
|
|
|
nh_pos = skb_network_header(skb) - skb->data;
|
|
h_pos = skb_transport_header(skb) - skb->data;
|
|
|
|
/* convert Ethernet header to proper 802.11 header (based on
|
|
* operation mode) */
|
|
ethertype = (skb->data[12] << 8) | skb->data[13];
|
|
fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
|
|
|
|
switch (iftype) {
|
|
case NL80211_IFTYPE_AP:
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
case NL80211_IFTYPE_P2P_GO:
|
|
fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
|
|
/* DA BSSID SA */
|
|
memcpy(hdr.addr1, skb->data, ETH_ALEN);
|
|
memcpy(hdr.addr2, addr, ETH_ALEN);
|
|
memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
|
|
hdrlen = 24;
|
|
break;
|
|
case NL80211_IFTYPE_STATION:
|
|
case NL80211_IFTYPE_P2P_CLIENT:
|
|
fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
|
|
/* BSSID SA DA */
|
|
memcpy(hdr.addr1, bssid, ETH_ALEN);
|
|
memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
|
|
memcpy(hdr.addr3, skb->data, ETH_ALEN);
|
|
hdrlen = 24;
|
|
break;
|
|
case NL80211_IFTYPE_ADHOC:
|
|
/* DA SA BSSID */
|
|
memcpy(hdr.addr1, skb->data, ETH_ALEN);
|
|
memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
|
|
memcpy(hdr.addr3, bssid, ETH_ALEN);
|
|
hdrlen = 24;
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (qos) {
|
|
fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
|
|
hdrlen += 2;
|
|
}
|
|
|
|
hdr.frame_control = fc;
|
|
hdr.duration_id = 0;
|
|
hdr.seq_ctrl = 0;
|
|
|
|
skip_header_bytes = ETH_HLEN;
|
|
if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
|
|
encaps_data = bridge_tunnel_header;
|
|
encaps_len = sizeof(bridge_tunnel_header);
|
|
skip_header_bytes -= 2;
|
|
} else if (ethertype >= ETH_P_802_3_MIN) {
|
|
encaps_data = rfc1042_header;
|
|
encaps_len = sizeof(rfc1042_header);
|
|
skip_header_bytes -= 2;
|
|
} else {
|
|
encaps_data = NULL;
|
|
encaps_len = 0;
|
|
}
|
|
|
|
skb_pull(skb, skip_header_bytes);
|
|
nh_pos -= skip_header_bytes;
|
|
h_pos -= skip_header_bytes;
|
|
|
|
head_need = hdrlen + encaps_len - skb_headroom(skb);
|
|
|
|
if (head_need > 0 || skb_cloned(skb)) {
|
|
head_need = max(head_need, 0);
|
|
if (head_need)
|
|
skb_orphan(skb);
|
|
|
|
if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC))
|
|
return -ENOMEM;
|
|
|
|
skb->truesize += head_need;
|
|
}
|
|
|
|
if (encaps_data) {
|
|
memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
|
|
nh_pos += encaps_len;
|
|
h_pos += encaps_len;
|
|
}
|
|
|
|
memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
|
|
|
|
nh_pos += hdrlen;
|
|
h_pos += hdrlen;
|
|
|
|
/* Update skb pointers to various headers since this modified frame
|
|
* is going to go through Linux networking code that may potentially
|
|
* need things like pointer to IP header. */
|
|
skb_set_mac_header(skb, 0);
|
|
skb_set_network_header(skb, nh_pos);
|
|
skb_set_transport_header(skb, h_pos);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_data_from_8023);
|
|
|
|
|
|
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,
|
|
bool has_80211_header)
|
|
{
|
|
struct sk_buff *frame = NULL;
|
|
u16 ethertype;
|
|
u8 *payload;
|
|
const struct ethhdr *eth;
|
|
int remaining, err;
|
|
u8 dst[ETH_ALEN], src[ETH_ALEN];
|
|
|
|
if (has_80211_header) {
|
|
err = ieee80211_data_to_8023(skb, addr, iftype);
|
|
if (err)
|
|
goto out;
|
|
|
|
/* skip the wrapping header */
|
|
eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr));
|
|
if (!eth)
|
|
goto out;
|
|
} else {
|
|
eth = (struct ethhdr *) skb->data;
|
|
}
|
|
|
|
while (skb != frame) {
|
|
u8 padding;
|
|
__be16 len = eth->h_proto;
|
|
unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len);
|
|
|
|
remaining = skb->len;
|
|
memcpy(dst, eth->h_dest, ETH_ALEN);
|
|
memcpy(src, eth->h_source, ETH_ALEN);
|
|
|
|
padding = (4 - subframe_len) & 0x3;
|
|
/* the last MSDU has no padding */
|
|
if (subframe_len > remaining)
|
|
goto purge;
|
|
|
|
skb_pull(skb, sizeof(struct ethhdr));
|
|
/* reuse skb for the last subframe */
|
|
if (remaining <= subframe_len + padding)
|
|
frame = skb;
|
|
else {
|
|
unsigned int hlen = ALIGN(extra_headroom, 4);
|
|
/*
|
|
* Allocate and reserve two bytes more for payload
|
|
* alignment since sizeof(struct ethhdr) is 14.
|
|
*/
|
|
frame = dev_alloc_skb(hlen + subframe_len + 2);
|
|
if (!frame)
|
|
goto purge;
|
|
|
|
skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2);
|
|
memcpy(skb_put(frame, ntohs(len)), skb->data,
|
|
ntohs(len));
|
|
|
|
eth = (struct ethhdr *)skb_pull(skb, ntohs(len) +
|
|
padding);
|
|
if (!eth) {
|
|
dev_kfree_skb(frame);
|
|
goto purge;
|
|
}
|
|
}
|
|
|
|
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))) {
|
|
/* remove RFC1042 or Bridge-Tunnel
|
|
* encapsulation and replace EtherType */
|
|
skb_pull(frame, 6);
|
|
memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN);
|
|
memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
|
|
} else {
|
|
memcpy(skb_push(frame, sizeof(__be16)), &len,
|
|
sizeof(__be16));
|
|
memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN);
|
|
memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
|
|
}
|
|
__skb_queue_tail(list, frame);
|
|
}
|
|
|
|
return;
|
|
|
|
purge:
|
|
__skb_queue_purge(list);
|
|
out:
|
|
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;
|
|
|
|
/* 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)
|
|
return skb->priority - 256;
|
|
|
|
if (vlan_tx_tag_present(skb)) {
|
|
vlan_priority = (vlan_tx_tag_get(skb) & VLAN_PRIO_MASK)
|
|
>> VLAN_PRIO_SHIFT;
|
|
if (vlan_priority > 0)
|
|
return vlan_priority;
|
|
}
|
|
|
|
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;
|
|
|
|
return (ntohl(mpls->entry) & MPLS_LS_TC_MASK)
|
|
>> MPLS_LS_TC_SHIFT;
|
|
}
|
|
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)
|
|
return qos_map->dscp_exception[i].up;
|
|
}
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
if (tmp_dscp >= qos_map->up[i].low &&
|
|
tmp_dscp <= qos_map->up[i].high)
|
|
return i;
|
|
}
|
|
}
|
|
|
|
return dscp >> 5;
|
|
}
|
|
EXPORT_SYMBOL(cfg80211_classify8021d);
|
|
|
|
const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie)
|
|
{
|
|
const struct cfg80211_bss_ies *ies;
|
|
|
|
ies = rcu_dereference(bss->ies);
|
|
if (!ies)
|
|
return NULL;
|
|
|
|
return cfg80211_find_ie(ie, ies->data, ies->len);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_bss_get_ie);
|
|
|
|
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 < 6; 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)
|
|
if (rdev_set_default_key(rdev, dev, i, true, true)) {
|
|
netdev_err(dev, "failed to set defkey %d\n", i);
|
|
continue;
|
|
}
|
|
if (wdev->connect_keys->defmgmt == i)
|
|
if (rdev_set_default_mgmt_key(rdev, dev, i))
|
|
netdev_err(dev, "failed to set mgtdef %d\n", i);
|
|
}
|
|
|
|
kfree(wdev->connect_keys);
|
|
wdev->connect_keys = NULL;
|
|
}
|
|
|
|
void cfg80211_process_wdev_events(struct wireless_dev *wdev)
|
|
{
|
|
struct cfg80211_event *ev;
|
|
unsigned long flags;
|
|
const u8 *bssid = NULL;
|
|
|
|
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:
|
|
if (!is_zero_ether_addr(ev->cr.bssid))
|
|
bssid = ev->cr.bssid;
|
|
__cfg80211_connect_result(
|
|
wdev->netdev, bssid,
|
|
ev->cr.req_ie, ev->cr.req_ie_len,
|
|
ev->cr.resp_ie, ev->cr.resp_ie_len,
|
|
ev->cr.status,
|
|
ev->cr.status == WLAN_STATUS_SUCCESS,
|
|
NULL);
|
|
break;
|
|
case EVENT_ROAMED:
|
|
__cfg80211_roamed(wdev, ev->rm.bss, ev->rm.req_ie,
|
|
ev->rm.req_ie_len, ev->rm.resp_ie,
|
|
ev->rm.resp_ie_len);
|
|
break;
|
|
case EVENT_DISCONNECTED:
|
|
__cfg80211_disconnected(wdev->netdev,
|
|
ev->dc.ie, ev->dc.ie_len,
|
|
ev->dc.reason, true);
|
|
break;
|
|
case EVENT_IBSS_JOINED:
|
|
__cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid,
|
|
ev->ij.channel);
|
|
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;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
list_for_each_entry(wdev, &rdev->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,
|
|
u32 *flags, struct vif_params *params)
|
|
{
|
|
int err;
|
|
enum nl80211_iftype otype = dev->ieee80211_ptr->iftype;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
/* don't support changing VLANs, you just re-create them */
|
|
if (otype == NL80211_IFTYPE_AP_VLAN)
|
|
return -EOPNOTSUPP;
|
|
|
|
/* cannot change into P2P device type */
|
|
if (ntype == NL80211_IFTYPE_P2P_DEVICE)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (!rdev->ops->change_virtual_intf ||
|
|
!(rdev->wiphy.interface_modes & (1 << ntype)))
|
|
return -EOPNOTSUPP;
|
|
|
|
/* if it's part of a bridge, reject changing type to station/ibss */
|
|
if ((dev->priv_flags & IFF_BRIDGE_PORT) &&
|
|
(ntype == NL80211_IFTYPE_ADHOC ||
|
|
ntype == NL80211_IFTYPE_STATION ||
|
|
ntype == NL80211_IFTYPE_P2P_CLIENT))
|
|
return -EBUSY;
|
|
|
|
if (ntype != otype && netif_running(dev)) {
|
|
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:
|
|
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;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
cfg80211_process_rdev_events(rdev);
|
|
}
|
|
|
|
err = rdev_change_virtual_intf(rdev, dev, ntype, flags, 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;
|
|
/* fall through */
|
|
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_WDS:
|
|
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:
|
|
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_60g(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_vht(struct rate_info *rate)
|
|
{
|
|
static const u32 base[4][10] = {
|
|
{ 6500000,
|
|
13000000,
|
|
19500000,
|
|
26000000,
|
|
39000000,
|
|
52000000,
|
|
58500000,
|
|
65000000,
|
|
78000000,
|
|
0,
|
|
},
|
|
{ 13500000,
|
|
27000000,
|
|
40500000,
|
|
54000000,
|
|
81000000,
|
|
108000000,
|
|
121500000,
|
|
135000000,
|
|
162000000,
|
|
180000000,
|
|
},
|
|
{ 29300000,
|
|
58500000,
|
|
87800000,
|
|
117000000,
|
|
175500000,
|
|
234000000,
|
|
263300000,
|
|
292500000,
|
|
351000000,
|
|
390000000,
|
|
},
|
|
{ 58500000,
|
|
117000000,
|
|
175500000,
|
|
234000000,
|
|
351000000,
|
|
468000000,
|
|
526500000,
|
|
585000000,
|
|
702000000,
|
|
780000000,
|
|
},
|
|
};
|
|
u32 bitrate;
|
|
int idx;
|
|
|
|
if (WARN_ON_ONCE(rate->mcs > 9))
|
|
return 0;
|
|
|
|
idx = rate->flags & (RATE_INFO_FLAGS_160_MHZ_WIDTH |
|
|
RATE_INFO_FLAGS_80P80_MHZ_WIDTH) ? 3 :
|
|
rate->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH ? 2 :
|
|
rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH ? 1 : 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;
|
|
}
|
|
|
|
u32 cfg80211_calculate_bitrate(struct rate_info *rate)
|
|
{
|
|
int modulation, streams, bitrate;
|
|
|
|
if (!(rate->flags & RATE_INFO_FLAGS_MCS) &&
|
|
!(rate->flags & RATE_INFO_FLAGS_VHT_MCS))
|
|
return rate->legacy;
|
|
if (rate->flags & RATE_INFO_FLAGS_60G)
|
|
return cfg80211_calculate_bitrate_60g(rate);
|
|
if (rate->flags & RATE_INFO_FLAGS_VHT_MCS)
|
|
return cfg80211_calculate_bitrate_vht(rate);
|
|
|
|
/* 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->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ?
|
|
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;
|
|
}
|
|
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);
|
|
|
|
bool ieee80211_operating_class_to_band(u8 operating_class,
|
|
enum ieee80211_band *band)
|
|
{
|
|
switch (operating_class) {
|
|
case 112:
|
|
case 115 ... 127:
|
|
*band = IEEE80211_BAND_5GHZ;
|
|
return true;
|
|
case 81:
|
|
case 82:
|
|
case 83:
|
|
case 84:
|
|
*band = IEEE80211_BAND_2GHZ;
|
|
return true;
|
|
case 180:
|
|
*band = IEEE80211_BAND_60GHZ;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_operating_class_to_band);
|
|
|
|
int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
|
|
u32 beacon_int)
|
|
{
|
|
struct wireless_dev *wdev;
|
|
int res = 0;
|
|
|
|
if (!beacon_int)
|
|
return -EINVAL;
|
|
|
|
list_for_each_entry(wdev, &rdev->wdev_list, list) {
|
|
if (!wdev->beacon_interval)
|
|
continue;
|
|
if (wdev->beacon_interval != beacon_int) {
|
|
res = -EINVAL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
int cfg80211_iter_combinations(struct wiphy *wiphy,
|
|
const int num_different_channels,
|
|
const u8 radar_detect,
|
|
const int iftype_num[NUM_NL80211_IFTYPES],
|
|
void (*iter)(const struct ieee80211_iface_combination *c,
|
|
void *data),
|
|
void *data)
|
|
{
|
|
int i, j, iftype;
|
|
int num_interfaces = 0;
|
|
u32 used_iftypes = 0;
|
|
|
|
for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
|
|
num_interfaces += iftype_num[iftype];
|
|
if (iftype_num[iftype] > 0 &&
|
|
!(wiphy->software_iftypes & BIT(iftype)))
|
|
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 (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 (wiphy->software_iftypes & BIT(iftype))
|
|
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 < iftype_num[iftype])
|
|
goto cont;
|
|
limits[j].max -= iftype_num[iftype];
|
|
}
|
|
}
|
|
|
|
if (radar_detect != (c->radar_detect_widths & radar_detect))
|
|
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;
|
|
|
|
/* 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,
|
|
const int num_different_channels,
|
|
const u8 radar_detect,
|
|
const int iftype_num[NUM_NL80211_IFTYPES])
|
|
{
|
|
int err, num = 0;
|
|
|
|
err = cfg80211_iter_combinations(wiphy, num_different_channels,
|
|
radar_detect, iftype_num,
|
|
cfg80211_iter_sum_ifcombs, &num);
|
|
if (err)
|
|
return err;
|
|
if (num == 0)
|
|
return -EBUSY;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(cfg80211_check_combinations);
|
|
|
|
int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
|
|
struct wireless_dev *wdev,
|
|
enum nl80211_iftype iftype,
|
|
struct ieee80211_channel *chan,
|
|
enum cfg80211_chan_mode chanmode,
|
|
u8 radar_detect)
|
|
{
|
|
struct wireless_dev *wdev_iter;
|
|
int num[NUM_NL80211_IFTYPES];
|
|
struct ieee80211_channel
|
|
*used_channels[CFG80211_MAX_NUM_DIFFERENT_CHANNELS];
|
|
struct ieee80211_channel *ch;
|
|
enum cfg80211_chan_mode chmode;
|
|
int num_different_channels = 0;
|
|
int total = 1;
|
|
int i;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (WARN_ON(hweight32(radar_detect) > 1))
|
|
return -EINVAL;
|
|
|
|
if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
|
|
return -EINVAL;
|
|
|
|
/* Always allow software iftypes */
|
|
if (rdev->wiphy.software_iftypes & BIT(iftype)) {
|
|
if (radar_detect)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
memset(num, 0, sizeof(num));
|
|
memset(used_channels, 0, sizeof(used_channels));
|
|
|
|
num[iftype] = 1;
|
|
|
|
/* TODO: We'll probably not need this anymore, since this
|
|
* should only be called with CHAN_MODE_UNDEFINED. There are
|
|
* still a couple of pending calls where other chanmodes are
|
|
* used, but we should get rid of them.
|
|
*/
|
|
switch (chanmode) {
|
|
case CHAN_MODE_UNDEFINED:
|
|
break;
|
|
case CHAN_MODE_SHARED:
|
|
WARN_ON(!chan);
|
|
used_channels[0] = chan;
|
|
num_different_channels++;
|
|
break;
|
|
case CHAN_MODE_EXCLUSIVE:
|
|
num_different_channels++;
|
|
break;
|
|
}
|
|
|
|
list_for_each_entry(wdev_iter, &rdev->wdev_list, list) {
|
|
if (wdev_iter == wdev)
|
|
continue;
|
|
if (wdev_iter->iftype == NL80211_IFTYPE_P2P_DEVICE) {
|
|
if (!wdev_iter->p2p_started)
|
|
continue;
|
|
} else if (wdev_iter->netdev) {
|
|
if (!netif_running(wdev_iter->netdev))
|
|
continue;
|
|
} else {
|
|
WARN_ON(1);
|
|
}
|
|
|
|
if (rdev->wiphy.software_iftypes & BIT(wdev_iter->iftype))
|
|
continue;
|
|
|
|
/*
|
|
* We may be holding the "wdev" mutex, but now need to lock
|
|
* wdev_iter. This is OK because once we get here wdev_iter
|
|
* is not wdev (tested above), but we need to use the nested
|
|
* locking for lockdep.
|
|
*/
|
|
mutex_lock_nested(&wdev_iter->mtx, 1);
|
|
__acquire(wdev_iter->mtx);
|
|
cfg80211_get_chan_state(wdev_iter, &ch, &chmode, &radar_detect);
|
|
wdev_unlock(wdev_iter);
|
|
|
|
switch (chmode) {
|
|
case CHAN_MODE_UNDEFINED:
|
|
break;
|
|
case CHAN_MODE_SHARED:
|
|
for (i = 0; i < CFG80211_MAX_NUM_DIFFERENT_CHANNELS; i++)
|
|
if (!used_channels[i] || used_channels[i] == ch)
|
|
break;
|
|
|
|
if (i == CFG80211_MAX_NUM_DIFFERENT_CHANNELS)
|
|
return -EBUSY;
|
|
|
|
if (used_channels[i] == NULL) {
|
|
used_channels[i] = ch;
|
|
num_different_channels++;
|
|
}
|
|
break;
|
|
case CHAN_MODE_EXCLUSIVE:
|
|
num_different_channels++;
|
|
break;
|
|
}
|
|
|
|
num[wdev_iter->iftype]++;
|
|
total++;
|
|
}
|
|
|
|
if (total == 1 && !radar_detect)
|
|
return 0;
|
|
|
|
return cfg80211_check_combinations(&rdev->wiphy, num_different_channels,
|
|
radar_detect, num);
|
|
}
|
|
|
|
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 ieee80211_band band;
|
|
unsigned int n_channels = 0;
|
|
|
|
for (band = 0; band < IEEE80211_NUM_BANDS; band++)
|
|
if (wiphy->bands[band])
|
|
n_channels += wiphy->bands[band]->n_channels;
|
|
|
|
return n_channels;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_get_num_supported_channels);
|
|
|
|
/* 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);
|