mac80211: support multi-bssid
Add support for multi-bssid. This includes: - Parsing multi-bssid element - Overriding DTIM values - Taking into account in various places the inner BSSID instead of transmitter BSSID - Save aside some multi-bssid properties needed by drivers Signed-off-by: Sara Sharon <sara.sharon@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Sara Sharon
Johannes Berg
parent
0cd01efb03
commit
78ac51f815
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@ -8,7 +8,7 @@
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* Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
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* Copyright (c) 2013 - 2014 Intel Mobile Communications GmbH
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* Copyright (c) 2016 - 2017 Intel Deutschland GmbH
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* Copyright (c) 2018 Intel Corporation
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* Copyright (c) 2018 - 2019 Intel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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@ -2475,6 +2475,7 @@ enum ieee80211_eid_ext {
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WLAN_EID_EXT_HE_OPERATION = 36,
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WLAN_EID_EXT_UORA = 37,
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WLAN_EID_EXT_HE_MU_EDCA = 38,
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WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION = 55,
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};
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/* Action category code */
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@ -2691,6 +2692,9 @@ enum ieee80211_tdls_actioncode {
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#define WLAN_EXT_CAPA10_TWT_REQUESTER_SUPPORT BIT(5)
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#define WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT BIT(6)
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/* Defines support for enhanced multi-bssid advertisement*/
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#define WLAN_EXT_CAPA11_EMA_SUPPORT BIT(1)
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/* TDLS specific payload type in the LLC/SNAP header */
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#define WLAN_TDLS_SNAP_RFTYPE 0x2
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@ -2882,6 +2886,34 @@ enum ieee80211_sa_query_action {
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WLAN_ACTION_SA_QUERY_RESPONSE = 1,
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};
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/**
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* struct ieee80211_bssid_index
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*
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* This structure refers to "Multiple BSSID-index element"
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*
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* @bssid_index: BSSID index
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* @dtim_period: optional, overrides transmitted BSS dtim period
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* @dtim_count: optional, overrides transmitted BSS dtim count
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*/
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struct ieee80211_bssid_index {
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u8 bssid_index;
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u8 dtim_period;
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u8 dtim_count;
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};
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/**
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* struct ieee80211_multiple_bssid_configuration
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*
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* This structure refers to "Multiple BSSID Configuration element"
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*
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* @bssid_count: total number of active BSSIDs in the set
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* @profile_periodicity: the least number of beacon frames need to be received
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* in order to discover all the nontransmitted BSSIDs in the set.
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*/
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struct ieee80211_multiple_bssid_configuration {
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u8 bssid_count;
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u8 profile_periodicity;
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};
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#define SUITE(oui, id) (((oui) << 8) | (id))
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@ -591,6 +591,14 @@ struct ieee80211_ftm_responder_params {
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* @ftm_responder: whether to enable or disable fine timing measurement FTM
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* responder functionality.
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* @ftmr_params: configurable lci/civic parameter when enabling FTM responder.
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* @nontransmitted: this BSS is a nontransmitted BSS profile
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* @transmitter_bssid: the address of transmitter AP
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* @bssid_index: index inside the multiple BSSID set
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* @bssid_indicator: 2^bssid_indicator is the maximum number of APs in set
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* @ema_ap: AP supports enhancements of discovery and advertisement of
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* nontransmitted BSSIDs
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* @profile_periodicity: the least number of beacon frames need to be received
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* in order to discover all the nontransmitted BSSIDs in the set.
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*/
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struct ieee80211_bss_conf {
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const u8 *bssid;
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@ -644,6 +652,13 @@ struct ieee80211_bss_conf {
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bool protected_keep_alive;
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bool ftm_responder;
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struct ieee80211_ftm_responder_params *ftmr_params;
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/* Multiple BSSID data */
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bool nontransmitted;
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u8 transmitter_bssid[ETH_ALEN];
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u8 bssid_index;
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u8 bssid_indicator;
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bool ema_ap;
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u8 profile_periodicity;
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};
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/**
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@ -1495,6 +1495,12 @@ struct ieee802_11_elems {
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const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
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struct ieee80211_mesh_chansw_params_ie *mesh_chansw_params_ie;
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const struct ieee80211_bss_max_idle_period_ie *max_idle_period_ie;
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const struct ieee80211_multiple_bssid_configuration *mbssid_config_ie;
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const struct ieee80211_bssid_index *bssid_index;
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const u8 *nontransmitted_bssid_profile;
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u8 max_bssid_indicator;
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u8 dtim_count;
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u8 dtim_period;
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/* length of them, respectively */
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u8 ext_capab_len;
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@ -1513,6 +1519,7 @@ struct ieee802_11_elems {
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u8 prep_len;
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u8 perr_len;
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u8 country_elem_len;
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u8 bssid_index_len;
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/* whether a parse error occurred while retrieving these elements */
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bool parse_error;
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@ -3308,6 +3308,14 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
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/* TODO: OPEN: what happens if BSS color disable is set? */
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}
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if (cbss->transmitted_bss) {
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bss_conf->nontransmitted = true;
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ether_addr_copy(bss_conf->transmitter_bssid,
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cbss->transmitted_bss->bssid);
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bss_conf->bssid_indicator = cbss->max_bssid_indicator;
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bss_conf->bssid_index = cbss->bssid_index;
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}
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/*
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* Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
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* in their association response, so ignore that data for our own
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@ -3692,6 +3700,16 @@ static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
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}
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}
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static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
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struct cfg80211_bss *bss)
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{
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if (ether_addr_equal(tx_bssid, bss->bssid))
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return true;
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if (!bss->transmitted_bss)
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return false;
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return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
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}
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static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
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struct ieee80211_mgmt *mgmt, size_t len,
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struct ieee80211_rx_status *rx_status)
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@ -3733,17 +3751,16 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
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rcu_read_unlock();
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if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
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ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
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ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) {
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ieee802_11_parse_elems(mgmt->u.beacon.variable,
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len - baselen, false, &elems,
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mgmt->bssid,
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ifmgd->assoc_data->bss->bssid);
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ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
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if (elems.tim && !elems.parse_error) {
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const struct ieee80211_tim_ie *tim_ie = elems.tim;
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ifmgd->dtim_period = tim_ie->dtim_period;
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}
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if (elems.dtim_period)
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ifmgd->dtim_period = elems.dtim_period;
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ifmgd->have_beacon = true;
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ifmgd->assoc_data->need_beacon = false;
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if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
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@ -3751,12 +3768,17 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
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le64_to_cpu(mgmt->u.beacon.timestamp);
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sdata->vif.bss_conf.sync_device_ts =
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rx_status->device_timestamp;
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if (elems.tim)
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sdata->vif.bss_conf.sync_dtim_count =
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elems.tim->dtim_count;
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else
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sdata->vif.bss_conf.sync_dtim_count = 0;
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sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
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}
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if (elems.mbssid_config_ie)
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bss_conf->profile_periodicity =
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elems.mbssid_config_ie->profile_periodicity;
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if (elems.ext_capab_len >= 11 &&
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(elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
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bss_conf->ema_ap = true;
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/* continue assoc process */
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ifmgd->assoc_data->timeout = jiffies;
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ifmgd->assoc_data->timeout_started = true;
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@ -3765,7 +3787,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
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}
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if (!ifmgd->associated ||
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!ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
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!ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->associated))
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return;
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bssid = ifmgd->associated->bssid;
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@ -3861,11 +3883,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
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le64_to_cpu(mgmt->u.beacon.timestamp);
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sdata->vif.bss_conf.sync_device_ts =
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rx_status->device_timestamp;
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if (elems.tim)
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sdata->vif.bss_conf.sync_dtim_count =
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elems.tim->dtim_count;
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else
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sdata->vif.bss_conf.sync_dtim_count = 0;
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sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
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}
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if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
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@ -3891,10 +3909,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
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*/
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if (!ifmgd->have_beacon) {
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/* a few bogus AP send dtim_period = 0 or no TIM IE */
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if (elems.tim)
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bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
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else
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bss_conf->dtim_period = 1;
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bss_conf->dtim_period = elems.dtim_period ?: 1;
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changed |= BSS_CHANGED_BEACON_INFO;
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ifmgd->have_beacon = true;
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@ -4761,6 +4776,40 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
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return ret;
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}
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static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
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u8 *dtim_count, u8 *dtim_period)
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{
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const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
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const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
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ies->len);
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const struct ieee80211_tim_ie *tim = NULL;
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const struct ieee80211_bssid_index *idx;
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bool valid = tim_ie && tim_ie[1] >= 2;
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if (valid)
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tim = (void *)(tim_ie + 2);
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if (dtim_count)
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*dtim_count = valid ? tim->dtim_count : 0;
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if (dtim_period)
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*dtim_period = valid ? tim->dtim_period : 0;
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/* Check if value is overridden by non-transmitted profile */
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if (!idx_ie || idx_ie[1] < 3)
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return valid;
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idx = (void *)(idx_ie + 2);
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if (dtim_count)
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*dtim_count = idx->dtim_count;
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if (dtim_period)
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*dtim_period = idx->dtim_period;
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return true;
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}
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static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
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struct cfg80211_bss *cbss, bool assoc,
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bool override)
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@ -4852,17 +4901,13 @@ static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
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rcu_read_lock();
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ies = rcu_dereference(cbss->beacon_ies);
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if (ies) {
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const u8 *tim_ie;
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sdata->vif.bss_conf.sync_tsf = ies->tsf;
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sdata->vif.bss_conf.sync_device_ts =
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bss->device_ts_beacon;
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tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
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ies->data, ies->len);
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if (tim_ie && tim_ie[1] >= 2)
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sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
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else
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sdata->vif.bss_conf.sync_dtim_count = 0;
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ieee80211_get_dtim(ies,
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&sdata->vif.bss_conf.sync_dtim_count,
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NULL);
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} else if (!ieee80211_hw_check(&sdata->local->hw,
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TIMING_BEACON_ONLY)) {
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ies = rcu_dereference(cbss->proberesp_ies);
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@ -5332,17 +5377,12 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
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assoc_data->timeout_started = true;
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assoc_data->need_beacon = true;
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} else if (beacon_ies) {
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const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
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beacon_ies->data,
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beacon_ies->len);
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const u8 *ie;
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u8 dtim_count = 0;
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if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
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const struct ieee80211_tim_ie *tim;
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tim = (void *)(tim_ie + 2);
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ifmgd->dtim_period = tim->dtim_period;
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dtim_count = tim->dtim_count;
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}
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ieee80211_get_dtim(beacon_ies, &dtim_count,
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&ifmgd->dtim_period);
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ifmgd->have_beacon = true;
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assoc_data->timeout = jiffies;
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assoc_data->timeout_started = true;
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@ -5353,6 +5393,17 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
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bss->device_ts_beacon;
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sdata->vif.bss_conf.sync_dtim_count = dtim_count;
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}
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ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
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beacon_ies->data, beacon_ies->len);
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if (ie && ie[1] >= 3)
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sdata->vif.bss_conf.profile_periodicity = ie[4];
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ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY,
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beacon_ies->data, beacon_ies->len);
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if (ie && ie[1] >= 11 &&
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(ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
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sdata->vif.bss_conf.ema_ap = true;
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} else {
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assoc_data->timeout = jiffies;
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assoc_data->timeout_started = true;
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@ -144,8 +144,8 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
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struct ieee80211_channel *channel)
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{
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bool beacon = ieee80211_is_beacon(mgmt->frame_control);
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struct cfg80211_bss *cbss;
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struct ieee80211_bss *bss;
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struct cfg80211_bss *cbss, *non_tx_cbss;
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struct ieee80211_bss *bss, *non_tx_bss;
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struct cfg80211_inform_bss bss_meta = {
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.boottime_ns = rx_status->boottime_ns,
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};
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@ -212,6 +212,13 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
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bss = (void *)cbss->priv;
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ieee80211_update_bss_from_elems(local, bss, &elems, rx_status, beacon);
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list_for_each_entry(non_tx_cbss, &cbss->nontrans_list, nontrans_list) {
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non_tx_bss = (void *)non_tx_cbss->priv;
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ieee80211_update_bss_from_elems(local, non_tx_bss, &elems,
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rx_status, beacon);
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}
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return bss;
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}
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@ -891,20 +891,18 @@ void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
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}
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EXPORT_SYMBOL(ieee80211_queue_delayed_work);
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u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
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struct ieee802_11_elems *elems,
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u64 filter, u32 crc, u8 *transmitter_bssid,
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u8 *bss_bssid)
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static u32
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_ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
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struct ieee802_11_elems *elems,
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u64 filter, u32 crc, u8 *transmitter_bssid,
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u8 *bss_bssid)
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{
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struct element *elem;
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const struct element *elem, *sub;
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bool calc_crc = filter != 0;
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DECLARE_BITMAP(seen_elems, 256);
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const u8 *ie;
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bitmap_zero(seen_elems, 256);
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memset(elems, 0, sizeof(*elems));
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elems->ie_start = start;
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elems->total_len = len;
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for_each_element(elem, start, len) {
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bool elem_parse_failed;
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|
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@ -1210,6 +1208,57 @@ u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
|
|||
if (elen >= sizeof(*elems->max_idle_period_ie))
|
||||
elems->max_idle_period_ie = (void *)pos;
|
||||
break;
|
||||
case WLAN_EID_MULTIPLE_BSSID:
|
||||
if (!bss_bssid || !transmitter_bssid || elen < 4)
|
||||
break;
|
||||
|
||||
elems->max_bssid_indicator = pos[0];
|
||||
|
||||
for_each_element(sub, pos + 1, elen - 1) {
|
||||
u8 sub_len = sub->datalen;
|
||||
u8 new_bssid[ETH_ALEN];
|
||||
const u8 *index;
|
||||
|
||||
/*
|
||||
* we only expect the "non-transmitted BSSID
|
||||
* profile" subelement (subelement id 0)
|
||||
*/
|
||||
if (sub->id != 0 || sub->datalen < 4) {
|
||||
/* not a valid BSS profile */
|
||||
continue;
|
||||
}
|
||||
|
||||
if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
|
||||
sub->data[1] != 2) {
|
||||
/* The first element of the
|
||||
* Nontransmitted BSSID Profile is not
|
||||
* the Nontransmitted BSSID Capability
|
||||
* element.
|
||||
*/
|
||||
continue;
|
||||
}
|
||||
|
||||
/* found a Nontransmitted BSSID Profile */
|
||||
index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
|
||||
sub->data, sub_len);
|
||||
if (!index || index[1] < 1 || index[2] == 0) {
|
||||
/* Invalid MBSSID Index element */
|
||||
continue;
|
||||
}
|
||||
|
||||
cfg80211_gen_new_bssid(transmitter_bssid,
|
||||
pos[0],
|
||||
index[2],
|
||||
new_bssid);
|
||||
if (ether_addr_equal(new_bssid, bss_bssid)) {
|
||||
elems->nontransmitted_bssid_profile =
|
||||
(void *)sub;
|
||||
elems->bssid_index_len = index[1];
|
||||
elems->bssid_index = (void *)&index[2];
|
||||
break;
|
||||
}
|
||||
}
|
||||
break;
|
||||
case WLAN_EID_EXTENSION:
|
||||
if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
|
||||
elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
|
||||
|
|
@ -1225,6 +1274,10 @@ u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
|
|||
elems->he_operation = (void *)&pos[1];
|
||||
} else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
|
||||
elems->uora_element = (void *)&pos[1];
|
||||
} else if (pos[0] ==
|
||||
WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION &&
|
||||
elen == 3) {
|
||||
elems->mbssid_config_ie = (void *)&pos[1];
|
||||
}
|
||||
break;
|
||||
default:
|
||||
|
|
@ -1243,6 +1296,48 @@ u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
|
|||
return crc;
|
||||
}
|
||||
|
||||
u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
|
||||
struct ieee802_11_elems *elems,
|
||||
u64 filter, u32 crc, u8 *transmitter_bssid,
|
||||
u8 *bss_bssid)
|
||||
{
|
||||
memset(elems, 0, sizeof(*elems));
|
||||
elems->ie_start = start;
|
||||
elems->total_len = len;
|
||||
|
||||
crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
|
||||
crc, transmitter_bssid, bss_bssid);
|
||||
|
||||
/* Override with nontransmitted profile, if found */
|
||||
if (transmitter_bssid && elems->nontransmitted_bssid_profile) {
|
||||
const u8 *profile = elems->nontransmitted_bssid_profile;
|
||||
|
||||
_ieee802_11_parse_elems_crc(&profile[2], profile[1],
|
||||
action, elems, 0, 0,
|
||||
transmitter_bssid, bss_bssid);
|
||||
}
|
||||
|
||||
if (elems->tim && !elems->parse_error) {
|
||||
const struct ieee80211_tim_ie *tim_ie = elems->tim;
|
||||
|
||||
elems->dtim_period = tim_ie->dtim_period;
|
||||
elems->dtim_count = tim_ie->dtim_count;
|
||||
}
|
||||
|
||||
/* Override DTIM period and count if needed */
|
||||
if (elems->bssid_index &&
|
||||
elems->bssid_index_len >=
|
||||
offsetofend(struct ieee80211_bssid_index, dtim_period))
|
||||
elems->dtim_period = elems->bssid_index->dtim_period;
|
||||
|
||||
if (elems->bssid_index &&
|
||||
elems->bssid_index_len >=
|
||||
offsetofend(struct ieee80211_bssid_index, dtim_count))
|
||||
elems->dtim_count = elems->bssid_index->dtim_count;
|
||||
|
||||
return crc;
|
||||
}
|
||||
|
||||
void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
|
||||
struct ieee80211_tx_queue_params
|
||||
*qparam, int ac)
|
||||
|
|
|
|||
Loading…
Reference in New Issue