![Paul Gortmaker](/assets/img/avatar_default.png)
These files are non modular, but need to export symbols using the macros now living in export.h -- call out the include so that things won't break when we remove the implicit presence of module.h from everywhere. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
1220 lines
30 KiB
C
1220 lines
30 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 <linux/crc32.h>
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#include <net/cfg80211.h>
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#include <net/ip.h>
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#include "core.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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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 (band == 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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} else { /* 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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else
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return 0; /* not supported */
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}
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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
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return (freq - 5000) / 5;
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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_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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/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
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/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
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const unsigned char rfc1042_header[] __aligned(2) =
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{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
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EXPORT_SYMBOL(rfc1042_header);
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/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
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const unsigned char bridge_tunnel_header[] __aligned(2) =
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{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
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EXPORT_SYMBOL(bridge_tunnel_header);
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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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static 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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/* 7.1.3.5a.2 */
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switch (ae) {
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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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case (MESH_FLAGS_AE_A4 | MESH_FLAGS_AE_A5_A6):
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return 24;
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default:
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return 6;
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}
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}
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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_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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!compare_ether_addr(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_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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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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if (likely((compare_ether_addr(payload, rfc1042_header) == 0 &&
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ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
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compare_ether_addr(payload, bridge_tunnel_header) == 0)) {
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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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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);
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|
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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;
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int encaps_len, skip_header_bytes;
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int nh_pos, h_pos;
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int head_need;
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if (unlikely(skb->len < ETH_HLEN))
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return -EINVAL;
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nh_pos = skb_network_header(skb) - skb->data;
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h_pos = skb_transport_header(skb) - skb->data;
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/* convert Ethernet header to proper 802.11 header (based on
|
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* operation mode) */
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ethertype = (skb->data[12] << 8) | skb->data[13];
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fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
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switch (iftype) {
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case NL80211_IFTYPE_AP:
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case NL80211_IFTYPE_AP_VLAN:
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case NL80211_IFTYPE_P2P_GO:
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fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
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/* DA BSSID SA */
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memcpy(hdr.addr1, skb->data, ETH_ALEN);
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memcpy(hdr.addr2, addr, ETH_ALEN);
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memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
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hdrlen = 24;
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break;
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case NL80211_IFTYPE_STATION:
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case NL80211_IFTYPE_P2P_CLIENT:
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fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
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/* BSSID SA DA */
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memcpy(hdr.addr1, bssid, ETH_ALEN);
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memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
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memcpy(hdr.addr3, skb->data, ETH_ALEN);
|
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hdrlen = 24;
|
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break;
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case NL80211_IFTYPE_ADHOC:
|
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/* 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 > 0x600) {
|
|
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((compare_ether_addr(payload, rfc1042_header) == 0 &&
|
|
ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
|
|
compare_ether_addr(payload,
|
|
bridge_tunnel_header) == 0)) {
|
|
/* 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)
|
|
{
|
|
unsigned int dscp;
|
|
|
|
/* 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;
|
|
|
|
switch (skb->protocol) {
|
|
case htons(ETH_P_IP):
|
|
dscp = ip_hdr(skb)->tos & 0xfc;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
return dscp >> 5;
|
|
}
|
|
EXPORT_SYMBOL(cfg80211_classify8021d);
|
|
|
|
const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie)
|
|
{
|
|
u8 *end, *pos;
|
|
|
|
pos = bss->information_elements;
|
|
if (pos == NULL)
|
|
return NULL;
|
|
end = pos + bss->len_information_elements;
|
|
|
|
while (pos + 1 < end) {
|
|
if (pos + 2 + pos[1] > end)
|
|
break;
|
|
if (pos[0] == ie)
|
|
return pos;
|
|
pos += 2 + pos[1];
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_bss_get_ie);
|
|
|
|
void cfg80211_upload_connect_keys(struct wireless_dev *wdev)
|
|
{
|
|
struct cfg80211_registered_device *rdev = wiphy_to_dev(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->ops->add_key(wdev->wiphy, 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->ops->set_default_key(wdev->wiphy, dev,
|
|
i, true, true)) {
|
|
netdev_err(dev, "failed to set defkey %d\n", i);
|
|
continue;
|
|
}
|
|
if (wdev->connect_keys->defmgmt == i)
|
|
if (rdev->ops->set_default_mgmt_key(wdev->wiphy, dev, i))
|
|
netdev_err(dev, "failed to set mgtdef %d\n", i);
|
|
}
|
|
|
|
kfree(wdev->connect_keys);
|
|
wdev->connect_keys = NULL;
|
|
}
|
|
|
|
static 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.channel, ev->rm.bssid,
|
|
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);
|
|
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();
|
|
ASSERT_RDEV_LOCK(rdev);
|
|
|
|
mutex_lock(&rdev->devlist_mtx);
|
|
|
|
list_for_each_entry(wdev, &rdev->netdev_list, list)
|
|
cfg80211_process_wdev_events(wdev);
|
|
|
|
mutex_unlock(&rdev->devlist_mtx);
|
|
}
|
|
|
|
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_RDEV_LOCK(rdev);
|
|
|
|
/* don't support changing VLANs, you just re-create them */
|
|
if (otype == NL80211_IFTYPE_AP_VLAN)
|
|
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) {
|
|
err = cfg80211_can_change_interface(rdev, dev->ieee80211_ptr,
|
|
ntype);
|
|
if (err)
|
|
return err;
|
|
|
|
dev->ieee80211_ptr->use_4addr = false;
|
|
dev->ieee80211_ptr->mesh_id_up_len = 0;
|
|
|
|
switch (otype) {
|
|
case NL80211_IFTYPE_ADHOC:
|
|
cfg80211_leave_ibss(rdev, dev, false);
|
|
break;
|
|
case NL80211_IFTYPE_STATION:
|
|
case NL80211_IFTYPE_P2P_CLIENT:
|
|
cfg80211_disconnect(rdev, dev,
|
|
WLAN_REASON_DEAUTH_LEAVING, true);
|
|
break;
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
/* mesh should be handled? */
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
cfg80211_process_rdev_events(rdev);
|
|
}
|
|
|
|
err = rdev->ops->change_virtual_intf(&rdev->wiphy, 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;
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
u16 cfg80211_calculate_bitrate(struct rate_info *rate)
|
|
{
|
|
int modulation, streams, bitrate;
|
|
|
|
if (!(rate->flags & RATE_INFO_FLAGS_MCS))
|
|
return rate->legacy;
|
|
|
|
/* the formula below does only work for MCS values smaller than 32 */
|
|
if (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;
|
|
}
|
|
|
|
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;
|
|
|
|
mutex_lock(&rdev->devlist_mtx);
|
|
|
|
list_for_each_entry(wdev, &rdev->netdev_list, list) {
|
|
if (!wdev->beacon_interval)
|
|
continue;
|
|
if (wdev->beacon_interval != beacon_int) {
|
|
res = -EINVAL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&rdev->devlist_mtx);
|
|
|
|
return res;
|
|
}
|
|
|
|
int cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
|
|
struct wireless_dev *wdev,
|
|
enum nl80211_iftype iftype)
|
|
{
|
|
struct wireless_dev *wdev_iter;
|
|
int num[NUM_NL80211_IFTYPES];
|
|
int total = 1;
|
|
int i, j;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
/* Always allow software iftypes */
|
|
if (rdev->wiphy.software_iftypes & BIT(iftype))
|
|
return 0;
|
|
|
|
/*
|
|
* Drivers will gradually all set this flag, until all
|
|
* have it we only enforce for those that set it.
|
|
*/
|
|
if (!(rdev->wiphy.flags & WIPHY_FLAG_ENFORCE_COMBINATIONS))
|
|
return 0;
|
|
|
|
memset(num, 0, sizeof(num));
|
|
|
|
num[iftype] = 1;
|
|
|
|
mutex_lock(&rdev->devlist_mtx);
|
|
list_for_each_entry(wdev_iter, &rdev->netdev_list, list) {
|
|
if (wdev_iter == wdev)
|
|
continue;
|
|
if (!netif_running(wdev_iter->netdev))
|
|
continue;
|
|
|
|
if (rdev->wiphy.software_iftypes & BIT(wdev_iter->iftype))
|
|
continue;
|
|
|
|
num[wdev_iter->iftype]++;
|
|
total++;
|
|
}
|
|
mutex_unlock(&rdev->devlist_mtx);
|
|
|
|
for (i = 0; i < rdev->wiphy.n_iface_combinations; i++) {
|
|
const struct ieee80211_iface_combination *c;
|
|
struct ieee80211_iface_limit *limits;
|
|
|
|
c = &rdev->wiphy.iface_combinations[i];
|
|
|
|
limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits,
|
|
GFP_KERNEL);
|
|
if (!limits)
|
|
return -ENOMEM;
|
|
if (total > c->max_interfaces)
|
|
goto cont;
|
|
|
|
for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
|
|
if (rdev->wiphy.software_iftypes & BIT(iftype))
|
|
continue;
|
|
for (j = 0; j < c->n_limits; j++) {
|
|
if (!(limits[j].types & iftype))
|
|
continue;
|
|
if (limits[j].max < num[iftype])
|
|
goto cont;
|
|
limits[j].max -= num[iftype];
|
|
}
|
|
}
|
|
/* yay, it fits */
|
|
kfree(limits);
|
|
return 0;
|
|
cont:
|
|
kfree(limits);
|
|
}
|
|
|
|
return -EBUSY;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
|
|
struct ieee802_11_elems *elems,
|
|
u64 filter, u32 crc)
|
|
{
|
|
size_t left = len;
|
|
u8 *pos = start;
|
|
bool calc_crc = filter != 0;
|
|
|
|
memset(elems, 0, sizeof(*elems));
|
|
elems->ie_start = start;
|
|
elems->total_len = len;
|
|
|
|
while (left >= 2) {
|
|
u8 id, elen;
|
|
|
|
id = *pos++;
|
|
elen = *pos++;
|
|
left -= 2;
|
|
|
|
if (elen > left)
|
|
break;
|
|
|
|
if (calc_crc && id < 64 && (filter & (1ULL << id)))
|
|
crc = crc32_be(crc, pos - 2, elen + 2);
|
|
|
|
switch (id) {
|
|
case WLAN_EID_SSID:
|
|
elems->ssid = pos;
|
|
elems->ssid_len = elen;
|
|
break;
|
|
case WLAN_EID_SUPP_RATES:
|
|
elems->supp_rates = pos;
|
|
elems->supp_rates_len = elen;
|
|
break;
|
|
case WLAN_EID_FH_PARAMS:
|
|
elems->fh_params = pos;
|
|
elems->fh_params_len = elen;
|
|
break;
|
|
case WLAN_EID_DS_PARAMS:
|
|
elems->ds_params = pos;
|
|
elems->ds_params_len = elen;
|
|
break;
|
|
case WLAN_EID_CF_PARAMS:
|
|
elems->cf_params = pos;
|
|
elems->cf_params_len = elen;
|
|
break;
|
|
case WLAN_EID_TIM:
|
|
if (elen >= sizeof(struct ieee80211_tim_ie)) {
|
|
elems->tim = (void *)pos;
|
|
elems->tim_len = elen;
|
|
}
|
|
break;
|
|
case WLAN_EID_IBSS_PARAMS:
|
|
elems->ibss_params = pos;
|
|
elems->ibss_params_len = elen;
|
|
break;
|
|
case WLAN_EID_CHALLENGE:
|
|
elems->challenge = pos;
|
|
elems->challenge_len = elen;
|
|
break;
|
|
case WLAN_EID_VENDOR_SPECIFIC:
|
|
if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
|
|
pos[2] == 0xf2) {
|
|
/* Microsoft OUI (00:50:F2) */
|
|
|
|
if (calc_crc)
|
|
crc = crc32_be(crc, pos - 2, elen + 2);
|
|
|
|
if (pos[3] == 1) {
|
|
/* OUI Type 1 - WPA IE */
|
|
elems->wpa = pos;
|
|
elems->wpa_len = elen;
|
|
} else if (elen >= 5 && pos[3] == 2) {
|
|
/* OUI Type 2 - WMM IE */
|
|
if (pos[4] == 0) {
|
|
elems->wmm_info = pos;
|
|
elems->wmm_info_len = elen;
|
|
} else if (pos[4] == 1) {
|
|
elems->wmm_param = pos;
|
|
elems->wmm_param_len = elen;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case WLAN_EID_RSN:
|
|
elems->rsn = pos;
|
|
elems->rsn_len = elen;
|
|
break;
|
|
case WLAN_EID_ERP_INFO:
|
|
elems->erp_info = pos;
|
|
elems->erp_info_len = elen;
|
|
break;
|
|
case WLAN_EID_EXT_SUPP_RATES:
|
|
elems->ext_supp_rates = pos;
|
|
elems->ext_supp_rates_len = elen;
|
|
break;
|
|
case WLAN_EID_HT_CAPABILITY:
|
|
if (elen >= sizeof(struct ieee80211_ht_cap))
|
|
elems->ht_cap_elem = (void *)pos;
|
|
break;
|
|
case WLAN_EID_HT_INFORMATION:
|
|
if (elen >= sizeof(struct ieee80211_ht_info))
|
|
elems->ht_info_elem = (void *)pos;
|
|
break;
|
|
case WLAN_EID_MESH_ID:
|
|
elems->mesh_id = pos;
|
|
elems->mesh_id_len = elen;
|
|
break;
|
|
case WLAN_EID_MESH_CONFIG:
|
|
if (elen >= sizeof(struct ieee80211_meshconf_ie))
|
|
elems->mesh_config = (void *)pos;
|
|
break;
|
|
case WLAN_EID_PEER_MGMT:
|
|
elems->peering = pos;
|
|
elems->peering_len = elen;
|
|
break;
|
|
case WLAN_EID_PREQ:
|
|
elems->preq = pos;
|
|
elems->preq_len = elen;
|
|
break;
|
|
case WLAN_EID_PREP:
|
|
elems->prep = pos;
|
|
elems->prep_len = elen;
|
|
break;
|
|
case WLAN_EID_PERR:
|
|
elems->perr = pos;
|
|
elems->perr_len = elen;
|
|
break;
|
|
case WLAN_EID_RANN:
|
|
if (elen >= sizeof(struct ieee80211_rann_ie))
|
|
elems->rann = (void *)pos;
|
|
break;
|
|
case WLAN_EID_CHANNEL_SWITCH:
|
|
elems->ch_switch_elem = pos;
|
|
elems->ch_switch_elem_len = elen;
|
|
break;
|
|
case WLAN_EID_QUIET:
|
|
if (!elems->quiet_elem) {
|
|
elems->quiet_elem = pos;
|
|
elems->quiet_elem_len = elen;
|
|
}
|
|
elems->num_of_quiet_elem++;
|
|
break;
|
|
case WLAN_EID_COUNTRY:
|
|
elems->country_elem = pos;
|
|
elems->country_elem_len = elen;
|
|
break;
|
|
case WLAN_EID_PWR_CONSTRAINT:
|
|
elems->pwr_constr_elem = pos;
|
|
elems->pwr_constr_elem_len = elen;
|
|
break;
|
|
case WLAN_EID_TIMEOUT_INTERVAL:
|
|
elems->timeout_int = pos;
|
|
elems->timeout_int_len = elen;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
left -= elen;
|
|
pos += elen;
|
|
}
|
|
|
|
return crc;
|
|
}
|
|
EXPORT_SYMBOL(ieee802_11_parse_elems_crc);
|