![David S. Miller](/assets/img/avatar_default.png)
Conflicts: drivers/net/ethernet/altera/altera_sgdma.c net/netlink/af_netlink.c net/sched/cls_api.c net/sched/sch_api.c The netlink conflict dealt with moving to netlink_capable() and netlink_ns_capable() in the 'net' tree vs. supporting 'tc' operations in non-init namespaces. These were simple transformations from netlink_capable to netlink_ns_capable. The Altera driver conflict was simply code removal overlapping some void pointer cast cleanups in net-next. Signed-off-by: David S. Miller <davem@davemloft.net>
2915 lines
74 KiB
C
2915 lines
74 KiB
C
/*
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* Copyright 2002-2005, Instant802 Networks, Inc.
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* Copyright 2005-2006, Devicescape Software, Inc.
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* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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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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* published by the Free Software Foundation.
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*
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* utilities for mac80211
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*/
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#include <net/mac80211.h>
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#include <linux/netdevice.h>
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#include <linux/export.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/skbuff.h>
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#include <linux/etherdevice.h>
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#include <linux/if_arp.h>
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#include <linux/bitmap.h>
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#include <linux/crc32.h>
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#include <net/net_namespace.h>
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#include <net/cfg80211.h>
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#include <net/rtnetlink.h>
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#include "ieee80211_i.h"
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#include "driver-ops.h"
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#include "rate.h"
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#include "mesh.h"
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#include "wme.h"
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#include "led.h"
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#include "wep.h"
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/* privid for wiphys to determine whether they belong to us or not */
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const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
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struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
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{
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struct ieee80211_local *local;
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BUG_ON(!wiphy);
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local = wiphy_priv(wiphy);
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return &local->hw;
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}
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EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
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u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
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enum nl80211_iftype type)
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{
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__le16 fc = hdr->frame_control;
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/* drop ACK/CTS frames and incorrect hdr len (ctrl) */
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if (len < 16)
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return NULL;
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if (ieee80211_is_data(fc)) {
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if (len < 24) /* drop incorrect hdr len (data) */
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return NULL;
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if (ieee80211_has_a4(fc))
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return NULL;
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if (ieee80211_has_tods(fc))
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return hdr->addr1;
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if (ieee80211_has_fromds(fc))
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return hdr->addr2;
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return hdr->addr3;
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}
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if (ieee80211_is_mgmt(fc)) {
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if (len < 24) /* drop incorrect hdr len (mgmt) */
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return NULL;
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return hdr->addr3;
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}
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if (ieee80211_is_ctl(fc)) {
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if (ieee80211_is_pspoll(fc))
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return hdr->addr1;
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if (ieee80211_is_back_req(fc)) {
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switch (type) {
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case NL80211_IFTYPE_STATION:
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return hdr->addr2;
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case NL80211_IFTYPE_AP:
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case NL80211_IFTYPE_AP_VLAN:
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return hdr->addr1;
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default:
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break; /* fall through to the return */
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}
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}
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}
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return NULL;
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}
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void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
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{
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struct sk_buff *skb;
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struct ieee80211_hdr *hdr;
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skb_queue_walk(&tx->skbs, skb) {
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hdr = (struct ieee80211_hdr *) skb->data;
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hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
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}
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}
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int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
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int rate, int erp, int short_preamble,
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int shift)
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{
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int dur;
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/* calculate duration (in microseconds, rounded up to next higher
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* integer if it includes a fractional microsecond) to send frame of
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* len bytes (does not include FCS) at the given rate. Duration will
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* also include SIFS.
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*
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* rate is in 100 kbps, so divident is multiplied by 10 in the
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* DIV_ROUND_UP() operations.
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*
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* shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
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* is assumed to be 0 otherwise.
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*/
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if (band == IEEE80211_BAND_5GHZ || erp) {
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/*
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* OFDM:
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*
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* N_DBPS = DATARATE x 4
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* N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
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* (16 = SIGNAL time, 6 = tail bits)
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* TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
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*
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* T_SYM = 4 usec
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* 802.11a - 18.5.2: aSIFSTime = 16 usec
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* 802.11g - 19.8.4: aSIFSTime = 10 usec +
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* signal ext = 6 usec
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*/
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dur = 16; /* SIFS + signal ext */
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dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
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dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
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/* IEEE 802.11-2012 18.3.2.4: all values above are:
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* * times 4 for 5 MHz
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* * times 2 for 10 MHz
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*/
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dur *= 1 << shift;
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/* rates should already consider the channel bandwidth,
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* don't apply divisor again.
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*/
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dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
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4 * rate); /* T_SYM x N_SYM */
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} else {
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/*
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* 802.11b or 802.11g with 802.11b compatibility:
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* 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
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* Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
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*
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* 802.11 (DS): 15.3.3, 802.11b: 18.3.4
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* aSIFSTime = 10 usec
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* aPreambleLength = 144 usec or 72 usec with short preamble
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* aPLCPHeaderLength = 48 usec or 24 usec with short preamble
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*/
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dur = 10; /* aSIFSTime = 10 usec */
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dur += short_preamble ? (72 + 24) : (144 + 48);
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dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
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}
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return dur;
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}
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/* Exported duration function for driver use */
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__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
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struct ieee80211_vif *vif,
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enum ieee80211_band band,
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size_t frame_len,
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struct ieee80211_rate *rate)
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{
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struct ieee80211_sub_if_data *sdata;
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u16 dur;
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int erp, shift = 0;
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bool short_preamble = false;
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erp = 0;
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if (vif) {
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sdata = vif_to_sdata(vif);
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short_preamble = sdata->vif.bss_conf.use_short_preamble;
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if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
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erp = rate->flags & IEEE80211_RATE_ERP_G;
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shift = ieee80211_vif_get_shift(vif);
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}
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dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
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short_preamble, shift);
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return cpu_to_le16(dur);
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}
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EXPORT_SYMBOL(ieee80211_generic_frame_duration);
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__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
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struct ieee80211_vif *vif, size_t frame_len,
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const struct ieee80211_tx_info *frame_txctl)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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struct ieee80211_rate *rate;
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struct ieee80211_sub_if_data *sdata;
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bool short_preamble;
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int erp, shift = 0, bitrate;
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u16 dur;
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struct ieee80211_supported_band *sband;
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sband = local->hw.wiphy->bands[frame_txctl->band];
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short_preamble = false;
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rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
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erp = 0;
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if (vif) {
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sdata = vif_to_sdata(vif);
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short_preamble = sdata->vif.bss_conf.use_short_preamble;
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if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
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erp = rate->flags & IEEE80211_RATE_ERP_G;
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shift = ieee80211_vif_get_shift(vif);
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}
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bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
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/* CTS duration */
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dur = ieee80211_frame_duration(sband->band, 10, bitrate,
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erp, short_preamble, shift);
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/* Data frame duration */
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dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
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erp, short_preamble, shift);
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/* ACK duration */
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dur += ieee80211_frame_duration(sband->band, 10, bitrate,
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erp, short_preamble, shift);
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return cpu_to_le16(dur);
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}
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EXPORT_SYMBOL(ieee80211_rts_duration);
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__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
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struct ieee80211_vif *vif,
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size_t frame_len,
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const struct ieee80211_tx_info *frame_txctl)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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struct ieee80211_rate *rate;
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struct ieee80211_sub_if_data *sdata;
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bool short_preamble;
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int erp, shift = 0, bitrate;
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u16 dur;
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struct ieee80211_supported_band *sband;
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sband = local->hw.wiphy->bands[frame_txctl->band];
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short_preamble = false;
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rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
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erp = 0;
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if (vif) {
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sdata = vif_to_sdata(vif);
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short_preamble = sdata->vif.bss_conf.use_short_preamble;
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if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
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erp = rate->flags & IEEE80211_RATE_ERP_G;
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shift = ieee80211_vif_get_shift(vif);
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}
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bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
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/* Data frame duration */
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dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
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erp, short_preamble, shift);
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if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
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/* ACK duration */
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dur += ieee80211_frame_duration(sband->band, 10, bitrate,
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erp, short_preamble, shift);
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}
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return cpu_to_le16(dur);
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}
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EXPORT_SYMBOL(ieee80211_ctstoself_duration);
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void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
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{
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struct ieee80211_sub_if_data *sdata;
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int n_acs = IEEE80211_NUM_ACS;
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if (local->hw.queues < IEEE80211_NUM_ACS)
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n_acs = 1;
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list_for_each_entry_rcu(sdata, &local->interfaces, list) {
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int ac;
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if (!sdata->dev)
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continue;
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if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
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local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
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continue;
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for (ac = 0; ac < n_acs; ac++) {
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int ac_queue = sdata->vif.hw_queue[ac];
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if (ac_queue == queue ||
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(sdata->vif.cab_queue == queue &&
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local->queue_stop_reasons[ac_queue] == 0 &&
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skb_queue_empty(&local->pending[ac_queue])))
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netif_wake_subqueue(sdata->dev, ac);
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}
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}
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}
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static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
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enum queue_stop_reason reason)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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trace_wake_queue(local, queue, reason);
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if (WARN_ON(queue >= hw->queues))
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return;
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if (!test_bit(reason, &local->queue_stop_reasons[queue]))
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return;
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__clear_bit(reason, &local->queue_stop_reasons[queue]);
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if (local->queue_stop_reasons[queue] != 0)
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/* someone still has this queue stopped */
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return;
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if (skb_queue_empty(&local->pending[queue])) {
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rcu_read_lock();
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ieee80211_propagate_queue_wake(local, queue);
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rcu_read_unlock();
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} else
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tasklet_schedule(&local->tx_pending_tasklet);
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}
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void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
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enum queue_stop_reason reason)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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unsigned long flags;
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spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
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__ieee80211_wake_queue(hw, queue, reason);
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spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
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}
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void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
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{
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ieee80211_wake_queue_by_reason(hw, queue,
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IEEE80211_QUEUE_STOP_REASON_DRIVER);
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}
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EXPORT_SYMBOL(ieee80211_wake_queue);
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static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
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enum queue_stop_reason reason)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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struct ieee80211_sub_if_data *sdata;
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int n_acs = IEEE80211_NUM_ACS;
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trace_stop_queue(local, queue, reason);
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if (WARN_ON(queue >= hw->queues))
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return;
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if (test_bit(reason, &local->queue_stop_reasons[queue]))
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return;
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__set_bit(reason, &local->queue_stop_reasons[queue]);
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if (local->hw.queues < IEEE80211_NUM_ACS)
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n_acs = 1;
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rcu_read_lock();
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list_for_each_entry_rcu(sdata, &local->interfaces, list) {
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int ac;
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if (!sdata->dev)
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continue;
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for (ac = 0; ac < n_acs; ac++) {
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if (sdata->vif.hw_queue[ac] == queue ||
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sdata->vif.cab_queue == queue)
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netif_stop_subqueue(sdata->dev, ac);
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}
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}
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rcu_read_unlock();
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}
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void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
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enum queue_stop_reason reason)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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unsigned long flags;
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spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
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__ieee80211_stop_queue(hw, queue, reason);
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spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
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}
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void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
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{
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ieee80211_stop_queue_by_reason(hw, queue,
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IEEE80211_QUEUE_STOP_REASON_DRIVER);
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}
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EXPORT_SYMBOL(ieee80211_stop_queue);
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void ieee80211_add_pending_skb(struct ieee80211_local *local,
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struct sk_buff *skb)
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{
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struct ieee80211_hw *hw = &local->hw;
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unsigned long flags;
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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int queue = info->hw_queue;
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if (WARN_ON(!info->control.vif)) {
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ieee80211_free_txskb(&local->hw, skb);
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return;
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}
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spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
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__ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
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__skb_queue_tail(&local->pending[queue], skb);
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__ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
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spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
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}
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void ieee80211_add_pending_skbs(struct ieee80211_local *local,
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struct sk_buff_head *skbs)
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{
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struct ieee80211_hw *hw = &local->hw;
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struct sk_buff *skb;
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unsigned long flags;
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int queue, i;
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spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
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while ((skb = skb_dequeue(skbs))) {
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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if (WARN_ON(!info->control.vif)) {
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ieee80211_free_txskb(&local->hw, skb);
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continue;
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}
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queue = info->hw_queue;
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__ieee80211_stop_queue(hw, queue,
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IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
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__skb_queue_tail(&local->pending[queue], skb);
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}
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for (i = 0; i < hw->queues; i++)
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__ieee80211_wake_queue(hw, i,
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IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
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spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
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}
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void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
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unsigned long queues,
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enum queue_stop_reason reason)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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unsigned long flags;
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int i;
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spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
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|
|
for_each_set_bit(i, &queues, hw->queues)
|
|
__ieee80211_stop_queue(hw, i, reason);
|
|
|
|
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
|
|
}
|
|
|
|
void ieee80211_stop_queues(struct ieee80211_hw *hw)
|
|
{
|
|
ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
|
|
IEEE80211_QUEUE_STOP_REASON_DRIVER);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_stop_queues);
|
|
|
|
int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
if (WARN_ON(queue >= hw->queues))
|
|
return true;
|
|
|
|
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
|
|
ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
|
|
&local->queue_stop_reasons[queue]);
|
|
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_queue_stopped);
|
|
|
|
void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
|
|
unsigned long queues,
|
|
enum queue_stop_reason reason)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
unsigned long flags;
|
|
int i;
|
|
|
|
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
|
|
|
|
for_each_set_bit(i, &queues, hw->queues)
|
|
__ieee80211_wake_queue(hw, i, reason);
|
|
|
|
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
|
|
}
|
|
|
|
void ieee80211_wake_queues(struct ieee80211_hw *hw)
|
|
{
|
|
ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
|
|
IEEE80211_QUEUE_STOP_REASON_DRIVER);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_wake_queues);
|
|
|
|
void ieee80211_flush_queues(struct ieee80211_local *local,
|
|
struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
u32 queues;
|
|
|
|
if (!local->ops->flush)
|
|
return;
|
|
|
|
if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
|
|
int ac;
|
|
|
|
queues = 0;
|
|
|
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
|
|
queues |= BIT(sdata->vif.hw_queue[ac]);
|
|
if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
|
|
queues |= BIT(sdata->vif.cab_queue);
|
|
} else {
|
|
/* all queues */
|
|
queues = BIT(local->hw.queues) - 1;
|
|
}
|
|
|
|
ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
|
|
IEEE80211_QUEUE_STOP_REASON_FLUSH);
|
|
|
|
drv_flush(local, sdata, queues, false);
|
|
|
|
ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
|
|
IEEE80211_QUEUE_STOP_REASON_FLUSH);
|
|
}
|
|
|
|
static void __iterate_active_interfaces(struct ieee80211_local *local,
|
|
u32 iter_flags,
|
|
void (*iterator)(void *data, u8 *mac,
|
|
struct ieee80211_vif *vif),
|
|
void *data)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata;
|
|
|
|
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
|
|
switch (sdata->vif.type) {
|
|
case NL80211_IFTYPE_MONITOR:
|
|
if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
|
|
continue;
|
|
break;
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
continue;
|
|
default:
|
|
break;
|
|
}
|
|
if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
|
|
!(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
|
|
continue;
|
|
if (ieee80211_sdata_running(sdata))
|
|
iterator(data, sdata->vif.addr,
|
|
&sdata->vif);
|
|
}
|
|
|
|
sdata = rcu_dereference_check(local->monitor_sdata,
|
|
lockdep_is_held(&local->iflist_mtx) ||
|
|
lockdep_rtnl_is_held());
|
|
if (sdata &&
|
|
(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
|
|
sdata->flags & IEEE80211_SDATA_IN_DRIVER))
|
|
iterator(data, sdata->vif.addr, &sdata->vif);
|
|
}
|
|
|
|
void ieee80211_iterate_active_interfaces(
|
|
struct ieee80211_hw *hw, u32 iter_flags,
|
|
void (*iterator)(void *data, u8 *mac,
|
|
struct ieee80211_vif *vif),
|
|
void *data)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
mutex_lock(&local->iflist_mtx);
|
|
__iterate_active_interfaces(local, iter_flags, iterator, data);
|
|
mutex_unlock(&local->iflist_mtx);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
|
|
|
|
void ieee80211_iterate_active_interfaces_atomic(
|
|
struct ieee80211_hw *hw, u32 iter_flags,
|
|
void (*iterator)(void *data, u8 *mac,
|
|
struct ieee80211_vif *vif),
|
|
void *data)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
rcu_read_lock();
|
|
__iterate_active_interfaces(local, iter_flags, iterator, data);
|
|
rcu_read_unlock();
|
|
}
|
|
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
|
|
|
|
void ieee80211_iterate_active_interfaces_rtnl(
|
|
struct ieee80211_hw *hw, u32 iter_flags,
|
|
void (*iterator)(void *data, u8 *mac,
|
|
struct ieee80211_vif *vif),
|
|
void *data)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
ASSERT_RTNL();
|
|
|
|
__iterate_active_interfaces(local, iter_flags, iterator, data);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
|
|
|
|
struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
|
|
|
|
if (!ieee80211_sdata_running(sdata) ||
|
|
!(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
|
|
return NULL;
|
|
return &sdata->vif;
|
|
}
|
|
EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
|
|
|
|
/*
|
|
* Nothing should have been stuffed into the workqueue during
|
|
* the suspend->resume cycle. If this WARN is seen then there
|
|
* is a bug with either the driver suspend or something in
|
|
* mac80211 stuffing into the workqueue which we haven't yet
|
|
* cleared during mac80211's suspend cycle.
|
|
*/
|
|
static bool ieee80211_can_queue_work(struct ieee80211_local *local)
|
|
{
|
|
if (WARN(local->suspended && !local->resuming,
|
|
"queueing ieee80211 work while going to suspend\n"))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
if (!ieee80211_can_queue_work(local))
|
|
return;
|
|
|
|
queue_work(local->workqueue, work);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_queue_work);
|
|
|
|
void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
|
|
struct delayed_work *dwork,
|
|
unsigned long delay)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
if (!ieee80211_can_queue_work(local))
|
|
return;
|
|
|
|
queue_delayed_work(local->workqueue, dwork, delay);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_queue_delayed_work);
|
|
|
|
u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
|
|
struct ieee802_11_elems *elems,
|
|
u64 filter, u32 crc)
|
|
{
|
|
size_t left = len;
|
|
const u8 *pos = start;
|
|
bool calc_crc = filter != 0;
|
|
DECLARE_BITMAP(seen_elems, 256);
|
|
const u8 *ie;
|
|
|
|
bitmap_zero(seen_elems, 256);
|
|
memset(elems, 0, sizeof(*elems));
|
|
elems->ie_start = start;
|
|
elems->total_len = len;
|
|
|
|
while (left >= 2) {
|
|
u8 id, elen;
|
|
bool elem_parse_failed;
|
|
|
|
id = *pos++;
|
|
elen = *pos++;
|
|
left -= 2;
|
|
|
|
if (elen > left) {
|
|
elems->parse_error = true;
|
|
break;
|
|
}
|
|
|
|
switch (id) {
|
|
case WLAN_EID_SSID:
|
|
case WLAN_EID_SUPP_RATES:
|
|
case WLAN_EID_FH_PARAMS:
|
|
case WLAN_EID_DS_PARAMS:
|
|
case WLAN_EID_CF_PARAMS:
|
|
case WLAN_EID_TIM:
|
|
case WLAN_EID_IBSS_PARAMS:
|
|
case WLAN_EID_CHALLENGE:
|
|
case WLAN_EID_RSN:
|
|
case WLAN_EID_ERP_INFO:
|
|
case WLAN_EID_EXT_SUPP_RATES:
|
|
case WLAN_EID_HT_CAPABILITY:
|
|
case WLAN_EID_HT_OPERATION:
|
|
case WLAN_EID_VHT_CAPABILITY:
|
|
case WLAN_EID_VHT_OPERATION:
|
|
case WLAN_EID_MESH_ID:
|
|
case WLAN_EID_MESH_CONFIG:
|
|
case WLAN_EID_PEER_MGMT:
|
|
case WLAN_EID_PREQ:
|
|
case WLAN_EID_PREP:
|
|
case WLAN_EID_PERR:
|
|
case WLAN_EID_RANN:
|
|
case WLAN_EID_CHANNEL_SWITCH:
|
|
case WLAN_EID_EXT_CHANSWITCH_ANN:
|
|
case WLAN_EID_COUNTRY:
|
|
case WLAN_EID_PWR_CONSTRAINT:
|
|
case WLAN_EID_TIMEOUT_INTERVAL:
|
|
case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
|
|
case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
|
|
case WLAN_EID_CHAN_SWITCH_PARAM:
|
|
/*
|
|
* not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
|
|
* that if the content gets bigger it might be needed more than once
|
|
*/
|
|
if (test_bit(id, seen_elems)) {
|
|
elems->parse_error = true;
|
|
left -= elen;
|
|
pos += elen;
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (calc_crc && id < 64 && (filter & (1ULL << id)))
|
|
crc = crc32_be(crc, pos - 2, elen + 2);
|
|
|
|
elem_parse_failed = false;
|
|
|
|
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_DS_PARAMS:
|
|
if (elen >= 1)
|
|
elems->ds_params = pos;
|
|
else
|
|
elem_parse_failed = true;
|
|
break;
|
|
case WLAN_EID_TIM:
|
|
if (elen >= sizeof(struct ieee80211_tim_ie)) {
|
|
elems->tim = (void *)pos;
|
|
elems->tim_len = elen;
|
|
} else
|
|
elem_parse_failed = true;
|
|
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 (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:
|
|
if (elen >= 1)
|
|
elems->erp_info = pos;
|
|
else
|
|
elem_parse_failed = true;
|
|
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;
|
|
else
|
|
elem_parse_failed = true;
|
|
break;
|
|
case WLAN_EID_HT_OPERATION:
|
|
if (elen >= sizeof(struct ieee80211_ht_operation))
|
|
elems->ht_operation = (void *)pos;
|
|
else
|
|
elem_parse_failed = true;
|
|
break;
|
|
case WLAN_EID_VHT_CAPABILITY:
|
|
if (elen >= sizeof(struct ieee80211_vht_cap))
|
|
elems->vht_cap_elem = (void *)pos;
|
|
else
|
|
elem_parse_failed = true;
|
|
break;
|
|
case WLAN_EID_VHT_OPERATION:
|
|
if (elen >= sizeof(struct ieee80211_vht_operation))
|
|
elems->vht_operation = (void *)pos;
|
|
else
|
|
elem_parse_failed = true;
|
|
break;
|
|
case WLAN_EID_OPMODE_NOTIF:
|
|
if (elen > 0)
|
|
elems->opmode_notif = pos;
|
|
else
|
|
elem_parse_failed = true;
|
|
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;
|
|
else
|
|
elem_parse_failed = true;
|
|
break;
|
|
case WLAN_EID_PEER_MGMT:
|
|
elems->peering = pos;
|
|
elems->peering_len = elen;
|
|
break;
|
|
case WLAN_EID_MESH_AWAKE_WINDOW:
|
|
if (elen >= 2)
|
|
elems->awake_window = (void *)pos;
|
|
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;
|
|
else
|
|
elem_parse_failed = true;
|
|
break;
|
|
case WLAN_EID_CHANNEL_SWITCH:
|
|
if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
|
|
elem_parse_failed = true;
|
|
break;
|
|
}
|
|
elems->ch_switch_ie = (void *)pos;
|
|
break;
|
|
case WLAN_EID_EXT_CHANSWITCH_ANN:
|
|
if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
|
|
elem_parse_failed = true;
|
|
break;
|
|
}
|
|
elems->ext_chansw_ie = (void *)pos;
|
|
break;
|
|
case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
|
|
if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
|
|
elem_parse_failed = true;
|
|
break;
|
|
}
|
|
elems->sec_chan_offs = (void *)pos;
|
|
break;
|
|
case WLAN_EID_CHAN_SWITCH_PARAM:
|
|
if (elen !=
|
|
sizeof(*elems->mesh_chansw_params_ie)) {
|
|
elem_parse_failed = true;
|
|
break;
|
|
}
|
|
elems->mesh_chansw_params_ie = (void *)pos;
|
|
break;
|
|
case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
|
|
if (!action ||
|
|
elen != sizeof(*elems->wide_bw_chansw_ie)) {
|
|
elem_parse_failed = true;
|
|
break;
|
|
}
|
|
elems->wide_bw_chansw_ie = (void *)pos;
|
|
break;
|
|
case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
|
|
if (action) {
|
|
elem_parse_failed = true;
|
|
break;
|
|
}
|
|
/*
|
|
* This is a bit tricky, but as we only care about
|
|
* the wide bandwidth channel switch element, so
|
|
* just parse it out manually.
|
|
*/
|
|
ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
|
|
pos, elen);
|
|
if (ie) {
|
|
if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
|
|
elems->wide_bw_chansw_ie =
|
|
(void *)(ie + 2);
|
|
else
|
|
elem_parse_failed = true;
|
|
}
|
|
break;
|
|
case WLAN_EID_COUNTRY:
|
|
elems->country_elem = pos;
|
|
elems->country_elem_len = elen;
|
|
break;
|
|
case WLAN_EID_PWR_CONSTRAINT:
|
|
if (elen != 1) {
|
|
elem_parse_failed = true;
|
|
break;
|
|
}
|
|
elems->pwr_constr_elem = pos;
|
|
break;
|
|
case WLAN_EID_TIMEOUT_INTERVAL:
|
|
if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
|
|
elems->timeout_int = (void *)pos;
|
|
else
|
|
elem_parse_failed = true;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (elem_parse_failed)
|
|
elems->parse_error = true;
|
|
else
|
|
__set_bit(id, seen_elems);
|
|
|
|
left -= elen;
|
|
pos += elen;
|
|
}
|
|
|
|
if (left != 0)
|
|
elems->parse_error = true;
|
|
|
|
return crc;
|
|
}
|
|
|
|
void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
|
|
bool bss_notify)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_tx_queue_params qparam;
|
|
struct ieee80211_chanctx_conf *chanctx_conf;
|
|
int ac;
|
|
bool use_11b, enable_qos;
|
|
int aCWmin, aCWmax;
|
|
|
|
if (!local->ops->conf_tx)
|
|
return;
|
|
|
|
if (local->hw.queues < IEEE80211_NUM_ACS)
|
|
return;
|
|
|
|
memset(&qparam, 0, sizeof(qparam));
|
|
|
|
rcu_read_lock();
|
|
chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
|
|
use_11b = (chanctx_conf &&
|
|
chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
|
|
!(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
|
|
rcu_read_unlock();
|
|
|
|
/*
|
|
* By default disable QoS in STA mode for old access points, which do
|
|
* not support 802.11e. New APs will provide proper queue parameters,
|
|
* that we will configure later.
|
|
*/
|
|
enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
|
|
|
|
/* Set defaults according to 802.11-2007 Table 7-37 */
|
|
aCWmax = 1023;
|
|
if (use_11b)
|
|
aCWmin = 31;
|
|
else
|
|
aCWmin = 15;
|
|
|
|
/* Confiure old 802.11b/g medium access rules. */
|
|
qparam.cw_max = aCWmax;
|
|
qparam.cw_min = aCWmin;
|
|
qparam.txop = 0;
|
|
qparam.aifs = 2;
|
|
|
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
|
|
/* Update if QoS is enabled. */
|
|
if (enable_qos) {
|
|
switch (ac) {
|
|
case IEEE80211_AC_BK:
|
|
qparam.cw_max = aCWmax;
|
|
qparam.cw_min = aCWmin;
|
|
qparam.txop = 0;
|
|
qparam.aifs = 7;
|
|
break;
|
|
/* never happens but let's not leave undefined */
|
|
default:
|
|
case IEEE80211_AC_BE:
|
|
qparam.cw_max = aCWmax;
|
|
qparam.cw_min = aCWmin;
|
|
qparam.txop = 0;
|
|
qparam.aifs = 3;
|
|
break;
|
|
case IEEE80211_AC_VI:
|
|
qparam.cw_max = aCWmin;
|
|
qparam.cw_min = (aCWmin + 1) / 2 - 1;
|
|
if (use_11b)
|
|
qparam.txop = 6016/32;
|
|
else
|
|
qparam.txop = 3008/32;
|
|
qparam.aifs = 2;
|
|
break;
|
|
case IEEE80211_AC_VO:
|
|
qparam.cw_max = (aCWmin + 1) / 2 - 1;
|
|
qparam.cw_min = (aCWmin + 1) / 4 - 1;
|
|
if (use_11b)
|
|
qparam.txop = 3264/32;
|
|
else
|
|
qparam.txop = 1504/32;
|
|
qparam.aifs = 2;
|
|
break;
|
|
}
|
|
}
|
|
|
|
qparam.uapsd = false;
|
|
|
|
sdata->tx_conf[ac] = qparam;
|
|
drv_conf_tx(local, sdata, ac, &qparam);
|
|
}
|
|
|
|
if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
|
|
sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
|
|
sdata->vif.bss_conf.qos = enable_qos;
|
|
if (bss_notify)
|
|
ieee80211_bss_info_change_notify(sdata,
|
|
BSS_CHANGED_QOS);
|
|
}
|
|
}
|
|
|
|
void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
|
|
u16 transaction, u16 auth_alg, u16 status,
|
|
const u8 *extra, size_t extra_len, const u8 *da,
|
|
const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
|
|
u32 tx_flags)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sk_buff *skb;
|
|
struct ieee80211_mgmt *mgmt;
|
|
int err;
|
|
|
|
/* 24 + 6 = header + auth_algo + auth_transaction + status_code */
|
|
skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24 + 6 + extra_len);
|
|
if (!skb)
|
|
return;
|
|
|
|
skb_reserve(skb, local->hw.extra_tx_headroom);
|
|
|
|
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
|
|
memset(mgmt, 0, 24 + 6);
|
|
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
|
|
IEEE80211_STYPE_AUTH);
|
|
memcpy(mgmt->da, da, ETH_ALEN);
|
|
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
|
|
memcpy(mgmt->bssid, bssid, ETH_ALEN);
|
|
mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
|
|
mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
|
|
mgmt->u.auth.status_code = cpu_to_le16(status);
|
|
if (extra)
|
|
memcpy(skb_put(skb, extra_len), extra, extra_len);
|
|
|
|
if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
|
|
mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
|
|
err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
|
|
WARN_ON(err);
|
|
}
|
|
|
|
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
|
|
tx_flags;
|
|
ieee80211_tx_skb(sdata, skb);
|
|
}
|
|
|
|
void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
|
|
const u8 *bssid, u16 stype, u16 reason,
|
|
bool send_frame, u8 *frame_buf)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sk_buff *skb;
|
|
struct ieee80211_mgmt *mgmt = (void *)frame_buf;
|
|
|
|
/* build frame */
|
|
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
|
|
mgmt->duration = 0; /* initialize only */
|
|
mgmt->seq_ctrl = 0; /* initialize only */
|
|
memcpy(mgmt->da, bssid, ETH_ALEN);
|
|
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
|
|
memcpy(mgmt->bssid, bssid, ETH_ALEN);
|
|
/* u.deauth.reason_code == u.disassoc.reason_code */
|
|
mgmt->u.deauth.reason_code = cpu_to_le16(reason);
|
|
|
|
if (send_frame) {
|
|
skb = dev_alloc_skb(local->hw.extra_tx_headroom +
|
|
IEEE80211_DEAUTH_FRAME_LEN);
|
|
if (!skb)
|
|
return;
|
|
|
|
skb_reserve(skb, local->hw.extra_tx_headroom);
|
|
|
|
/* copy in frame */
|
|
memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
|
|
mgmt, IEEE80211_DEAUTH_FRAME_LEN);
|
|
|
|
if (sdata->vif.type != NL80211_IFTYPE_STATION ||
|
|
!(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
|
|
IEEE80211_SKB_CB(skb)->flags |=
|
|
IEEE80211_TX_INTFL_DONT_ENCRYPT;
|
|
|
|
ieee80211_tx_skb(sdata, skb);
|
|
}
|
|
}
|
|
|
|
int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
|
|
size_t buffer_len, const u8 *ie, size_t ie_len,
|
|
enum ieee80211_band band, u32 rate_mask,
|
|
struct cfg80211_chan_def *chandef)
|
|
{
|
|
struct ieee80211_supported_band *sband;
|
|
u8 *pos = buffer, *end = buffer + buffer_len;
|
|
size_t offset = 0, noffset;
|
|
int supp_rates_len, i;
|
|
u8 rates[32];
|
|
int num_rates;
|
|
int ext_rates_len;
|
|
int shift;
|
|
u32 rate_flags;
|
|
|
|
sband = local->hw.wiphy->bands[band];
|
|
if (WARN_ON_ONCE(!sband))
|
|
return 0;
|
|
|
|
rate_flags = ieee80211_chandef_rate_flags(chandef);
|
|
shift = ieee80211_chandef_get_shift(chandef);
|
|
|
|
num_rates = 0;
|
|
for (i = 0; i < sband->n_bitrates; i++) {
|
|
if ((BIT(i) & rate_mask) == 0)
|
|
continue; /* skip rate */
|
|
if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
|
|
continue;
|
|
|
|
rates[num_rates++] =
|
|
(u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
|
|
(1 << shift) * 5);
|
|
}
|
|
|
|
supp_rates_len = min_t(int, num_rates, 8);
|
|
|
|
if (end - pos < 2 + supp_rates_len)
|
|
goto out_err;
|
|
*pos++ = WLAN_EID_SUPP_RATES;
|
|
*pos++ = supp_rates_len;
|
|
memcpy(pos, rates, supp_rates_len);
|
|
pos += supp_rates_len;
|
|
|
|
/* insert "request information" if in custom IEs */
|
|
if (ie && ie_len) {
|
|
static const u8 before_extrates[] = {
|
|
WLAN_EID_SSID,
|
|
WLAN_EID_SUPP_RATES,
|
|
WLAN_EID_REQUEST,
|
|
};
|
|
noffset = ieee80211_ie_split(ie, ie_len,
|
|
before_extrates,
|
|
ARRAY_SIZE(before_extrates),
|
|
offset);
|
|
if (end - pos < noffset - offset)
|
|
goto out_err;
|
|
memcpy(pos, ie + offset, noffset - offset);
|
|
pos += noffset - offset;
|
|
offset = noffset;
|
|
}
|
|
|
|
ext_rates_len = num_rates - supp_rates_len;
|
|
if (ext_rates_len > 0) {
|
|
if (end - pos < 2 + ext_rates_len)
|
|
goto out_err;
|
|
*pos++ = WLAN_EID_EXT_SUPP_RATES;
|
|
*pos++ = ext_rates_len;
|
|
memcpy(pos, rates + supp_rates_len, ext_rates_len);
|
|
pos += ext_rates_len;
|
|
}
|
|
|
|
if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
|
|
if (end - pos < 3)
|
|
goto out_err;
|
|
*pos++ = WLAN_EID_DS_PARAMS;
|
|
*pos++ = 1;
|
|
*pos++ = ieee80211_frequency_to_channel(
|
|
chandef->chan->center_freq);
|
|
}
|
|
|
|
/* insert custom IEs that go before HT */
|
|
if (ie && ie_len) {
|
|
static const u8 before_ht[] = {
|
|
WLAN_EID_SSID,
|
|
WLAN_EID_SUPP_RATES,
|
|
WLAN_EID_REQUEST,
|
|
WLAN_EID_EXT_SUPP_RATES,
|
|
WLAN_EID_DS_PARAMS,
|
|
WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
|
|
};
|
|
noffset = ieee80211_ie_split(ie, ie_len,
|
|
before_ht, ARRAY_SIZE(before_ht),
|
|
offset);
|
|
if (end - pos < noffset - offset)
|
|
goto out_err;
|
|
memcpy(pos, ie + offset, noffset - offset);
|
|
pos += noffset - offset;
|
|
offset = noffset;
|
|
}
|
|
|
|
if (sband->ht_cap.ht_supported) {
|
|
if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
|
|
goto out_err;
|
|
pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
|
|
sband->ht_cap.cap);
|
|
}
|
|
|
|
/*
|
|
* If adding more here, adjust code in main.c
|
|
* that calculates local->scan_ies_len.
|
|
*/
|
|
|
|
/* insert custom IEs that go before VHT */
|
|
if (ie && ie_len) {
|
|
static const u8 before_vht[] = {
|
|
WLAN_EID_SSID,
|
|
WLAN_EID_SUPP_RATES,
|
|
WLAN_EID_REQUEST,
|
|
WLAN_EID_EXT_SUPP_RATES,
|
|
WLAN_EID_DS_PARAMS,
|
|
WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
|
|
WLAN_EID_HT_CAPABILITY,
|
|
WLAN_EID_BSS_COEX_2040,
|
|
WLAN_EID_EXT_CAPABILITY,
|
|
WLAN_EID_SSID_LIST,
|
|
WLAN_EID_CHANNEL_USAGE,
|
|
WLAN_EID_INTERWORKING,
|
|
/* mesh ID can't happen here */
|
|
/* 60 GHz can't happen here right now */
|
|
};
|
|
noffset = ieee80211_ie_split(ie, ie_len,
|
|
before_vht, ARRAY_SIZE(before_vht),
|
|
offset);
|
|
if (end - pos < noffset - offset)
|
|
goto out_err;
|
|
memcpy(pos, ie + offset, noffset - offset);
|
|
pos += noffset - offset;
|
|
offset = noffset;
|
|
}
|
|
|
|
if (sband->vht_cap.vht_supported) {
|
|
if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
|
|
goto out_err;
|
|
pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
|
|
sband->vht_cap.cap);
|
|
}
|
|
|
|
/* add any remaining custom IEs */
|
|
if (ie && ie_len) {
|
|
noffset = ie_len;
|
|
if (end - pos < noffset - offset)
|
|
goto out_err;
|
|
memcpy(pos, ie + offset, noffset - offset);
|
|
pos += noffset - offset;
|
|
}
|
|
|
|
return pos - buffer;
|
|
out_err:
|
|
WARN_ONCE(1, "not enough space for preq IEs\n");
|
|
return pos - buffer;
|
|
}
|
|
|
|
struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
|
|
u8 *dst, u32 ratemask,
|
|
struct ieee80211_channel *chan,
|
|
const u8 *ssid, size_t ssid_len,
|
|
const u8 *ie, size_t ie_len,
|
|
bool directed)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct cfg80211_chan_def chandef;
|
|
struct sk_buff *skb;
|
|
struct ieee80211_mgmt *mgmt;
|
|
int ies_len;
|
|
|
|
/*
|
|
* Do not send DS Channel parameter for directed probe requests
|
|
* in order to maximize the chance that we get a response. Some
|
|
* badly-behaved APs don't respond when this parameter is included.
|
|
*/
|
|
chandef.width = sdata->vif.bss_conf.chandef.width;
|
|
if (directed)
|
|
chandef.chan = NULL;
|
|
else
|
|
chandef.chan = chan;
|
|
|
|
skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
|
|
ssid, ssid_len, 100 + ie_len);
|
|
if (!skb)
|
|
return NULL;
|
|
|
|
ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
|
|
skb_tailroom(skb),
|
|
ie, ie_len, chan->band,
|
|
ratemask, &chandef);
|
|
skb_put(skb, ies_len);
|
|
|
|
if (dst) {
|
|
mgmt = (struct ieee80211_mgmt *) skb->data;
|
|
memcpy(mgmt->da, dst, ETH_ALEN);
|
|
memcpy(mgmt->bssid, dst, ETH_ALEN);
|
|
}
|
|
|
|
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
|
|
|
|
return skb;
|
|
}
|
|
|
|
void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
|
|
const u8 *ssid, size_t ssid_len,
|
|
const u8 *ie, size_t ie_len,
|
|
u32 ratemask, bool directed, u32 tx_flags,
|
|
struct ieee80211_channel *channel, bool scan)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
|
|
ssid, ssid_len,
|
|
ie, ie_len, directed);
|
|
if (skb) {
|
|
IEEE80211_SKB_CB(skb)->flags |= tx_flags;
|
|
if (scan)
|
|
ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
|
|
else
|
|
ieee80211_tx_skb(sdata, skb);
|
|
}
|
|
}
|
|
|
|
u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee802_11_elems *elems,
|
|
enum ieee80211_band band, u32 *basic_rates)
|
|
{
|
|
struct ieee80211_supported_band *sband;
|
|
size_t num_rates;
|
|
u32 supp_rates, rate_flags;
|
|
int i, j, shift;
|
|
sband = sdata->local->hw.wiphy->bands[band];
|
|
|
|
rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
|
|
shift = ieee80211_vif_get_shift(&sdata->vif);
|
|
|
|
if (WARN_ON(!sband))
|
|
return 1;
|
|
|
|
num_rates = sband->n_bitrates;
|
|
supp_rates = 0;
|
|
for (i = 0; i < elems->supp_rates_len +
|
|
elems->ext_supp_rates_len; i++) {
|
|
u8 rate = 0;
|
|
int own_rate;
|
|
bool is_basic;
|
|
if (i < elems->supp_rates_len)
|
|
rate = elems->supp_rates[i];
|
|
else if (elems->ext_supp_rates)
|
|
rate = elems->ext_supp_rates
|
|
[i - elems->supp_rates_len];
|
|
own_rate = 5 * (rate & 0x7f);
|
|
is_basic = !!(rate & 0x80);
|
|
|
|
if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
|
|
continue;
|
|
|
|
for (j = 0; j < num_rates; j++) {
|
|
int brate;
|
|
if ((rate_flags & sband->bitrates[j].flags)
|
|
!= rate_flags)
|
|
continue;
|
|
|
|
brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
|
|
1 << shift);
|
|
|
|
if (brate == own_rate) {
|
|
supp_rates |= BIT(j);
|
|
if (basic_rates && is_basic)
|
|
*basic_rates |= BIT(j);
|
|
}
|
|
}
|
|
}
|
|
return supp_rates;
|
|
}
|
|
|
|
void ieee80211_stop_device(struct ieee80211_local *local)
|
|
{
|
|
ieee80211_led_radio(local, false);
|
|
ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
|
|
|
|
cancel_work_sync(&local->reconfig_filter);
|
|
|
|
flush_workqueue(local->workqueue);
|
|
drv_stop(local);
|
|
}
|
|
|
|
static void ieee80211_assign_chanctx(struct ieee80211_local *local,
|
|
struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_chanctx_conf *conf;
|
|
struct ieee80211_chanctx *ctx;
|
|
|
|
if (!local->use_chanctx)
|
|
return;
|
|
|
|
mutex_lock(&local->chanctx_mtx);
|
|
conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
|
|
lockdep_is_held(&local->chanctx_mtx));
|
|
if (conf) {
|
|
ctx = container_of(conf, struct ieee80211_chanctx, conf);
|
|
drv_assign_vif_chanctx(local, sdata, ctx);
|
|
}
|
|
mutex_unlock(&local->chanctx_mtx);
|
|
}
|
|
|
|
int ieee80211_reconfig(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_hw *hw = &local->hw;
|
|
struct ieee80211_sub_if_data *sdata;
|
|
struct ieee80211_chanctx *ctx;
|
|
struct sta_info *sta;
|
|
int res, i;
|
|
bool reconfig_due_to_wowlan = false;
|
|
struct ieee80211_sub_if_data *sched_scan_sdata;
|
|
bool sched_scan_stopped = false;
|
|
|
|
#ifdef CONFIG_PM
|
|
if (local->suspended)
|
|
local->resuming = true;
|
|
|
|
if (local->wowlan) {
|
|
res = drv_resume(local);
|
|
local->wowlan = false;
|
|
if (res < 0) {
|
|
local->resuming = false;
|
|
return res;
|
|
}
|
|
if (res == 0)
|
|
goto wake_up;
|
|
WARN_ON(res > 1);
|
|
/*
|
|
* res is 1, which means the driver requested
|
|
* to go through a regular reset on wakeup.
|
|
*/
|
|
reconfig_due_to_wowlan = true;
|
|
}
|
|
#endif
|
|
/* everything else happens only if HW was up & running */
|
|
if (!local->open_count)
|
|
goto wake_up;
|
|
|
|
/*
|
|
* Upon resume hardware can sometimes be goofy due to
|
|
* various platform / driver / bus issues, so restarting
|
|
* the device may at times not work immediately. Propagate
|
|
* the error.
|
|
*/
|
|
res = drv_start(local);
|
|
if (res) {
|
|
WARN(local->suspended, "Hardware became unavailable "
|
|
"upon resume. This could be a software issue "
|
|
"prior to suspend or a hardware issue.\n");
|
|
return res;
|
|
}
|
|
|
|
/* setup fragmentation threshold */
|
|
drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
|
|
|
|
/* setup RTS threshold */
|
|
drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
|
|
|
|
/* reset coverage class */
|
|
drv_set_coverage_class(local, hw->wiphy->coverage_class);
|
|
|
|
ieee80211_led_radio(local, true);
|
|
ieee80211_mod_tpt_led_trig(local,
|
|
IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
|
|
|
|
/* add interfaces */
|
|
sdata = rtnl_dereference(local->monitor_sdata);
|
|
if (sdata) {
|
|
/* in HW restart it exists already */
|
|
WARN_ON(local->resuming);
|
|
res = drv_add_interface(local, sdata);
|
|
if (WARN_ON(res)) {
|
|
RCU_INIT_POINTER(local->monitor_sdata, NULL);
|
|
synchronize_net();
|
|
kfree(sdata);
|
|
}
|
|
}
|
|
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
|
|
sdata->vif.type != NL80211_IFTYPE_MONITOR &&
|
|
ieee80211_sdata_running(sdata))
|
|
res = drv_add_interface(local, sdata);
|
|
}
|
|
|
|
/* add channel contexts */
|
|
if (local->use_chanctx) {
|
|
mutex_lock(&local->chanctx_mtx);
|
|
list_for_each_entry(ctx, &local->chanctx_list, list)
|
|
WARN_ON(drv_add_chanctx(local, ctx));
|
|
mutex_unlock(&local->chanctx_mtx);
|
|
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
if (!ieee80211_sdata_running(sdata))
|
|
continue;
|
|
ieee80211_assign_chanctx(local, sdata);
|
|
}
|
|
|
|
sdata = rtnl_dereference(local->monitor_sdata);
|
|
if (sdata && ieee80211_sdata_running(sdata))
|
|
ieee80211_assign_chanctx(local, sdata);
|
|
}
|
|
|
|
/* add STAs back */
|
|
mutex_lock(&local->sta_mtx);
|
|
list_for_each_entry(sta, &local->sta_list, list) {
|
|
enum ieee80211_sta_state state;
|
|
|
|
if (!sta->uploaded)
|
|
continue;
|
|
|
|
/* AP-mode stations will be added later */
|
|
if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
|
|
continue;
|
|
|
|
for (state = IEEE80211_STA_NOTEXIST;
|
|
state < sta->sta_state; state++)
|
|
WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
|
|
state + 1));
|
|
}
|
|
mutex_unlock(&local->sta_mtx);
|
|
|
|
/* reconfigure tx conf */
|
|
if (hw->queues >= IEEE80211_NUM_ACS) {
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
|
|
sdata->vif.type == NL80211_IFTYPE_MONITOR ||
|
|
!ieee80211_sdata_running(sdata))
|
|
continue;
|
|
|
|
for (i = 0; i < IEEE80211_NUM_ACS; i++)
|
|
drv_conf_tx(local, sdata, i,
|
|
&sdata->tx_conf[i]);
|
|
}
|
|
}
|
|
|
|
/* reconfigure hardware */
|
|
ieee80211_hw_config(local, ~0);
|
|
|
|
ieee80211_configure_filter(local);
|
|
|
|
/* Finally also reconfigure all the BSS information */
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
u32 changed;
|
|
|
|
if (!ieee80211_sdata_running(sdata))
|
|
continue;
|
|
|
|
/* common change flags for all interface types */
|
|
changed = BSS_CHANGED_ERP_CTS_PROT |
|
|
BSS_CHANGED_ERP_PREAMBLE |
|
|
BSS_CHANGED_ERP_SLOT |
|
|
BSS_CHANGED_HT |
|
|
BSS_CHANGED_BASIC_RATES |
|
|
BSS_CHANGED_BEACON_INT |
|
|
BSS_CHANGED_BSSID |
|
|
BSS_CHANGED_CQM |
|
|
BSS_CHANGED_QOS |
|
|
BSS_CHANGED_IDLE |
|
|
BSS_CHANGED_TXPOWER;
|
|
|
|
switch (sdata->vif.type) {
|
|
case NL80211_IFTYPE_STATION:
|
|
changed |= BSS_CHANGED_ASSOC |
|
|
BSS_CHANGED_ARP_FILTER |
|
|
BSS_CHANGED_PS;
|
|
|
|
/* Re-send beacon info report to the driver */
|
|
if (sdata->u.mgd.have_beacon)
|
|
changed |= BSS_CHANGED_BEACON_INFO;
|
|
|
|
sdata_lock(sdata);
|
|
ieee80211_bss_info_change_notify(sdata, changed);
|
|
sdata_unlock(sdata);
|
|
break;
|
|
case NL80211_IFTYPE_ADHOC:
|
|
changed |= BSS_CHANGED_IBSS;
|
|
/* fall through */
|
|
case NL80211_IFTYPE_AP:
|
|
changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
|
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP) {
|
|
changed |= BSS_CHANGED_AP_PROBE_RESP;
|
|
|
|
if (rcu_access_pointer(sdata->u.ap.beacon))
|
|
drv_start_ap(local, sdata);
|
|
}
|
|
|
|
/* fall through */
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
if (sdata->vif.bss_conf.enable_beacon) {
|
|
changed |= BSS_CHANGED_BEACON |
|
|
BSS_CHANGED_BEACON_ENABLED;
|
|
ieee80211_bss_info_change_notify(sdata, changed);
|
|
}
|
|
break;
|
|
case NL80211_IFTYPE_WDS:
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
case NL80211_IFTYPE_MONITOR:
|
|
case NL80211_IFTYPE_P2P_DEVICE:
|
|
/* nothing to do */
|
|
break;
|
|
case NL80211_IFTYPE_UNSPECIFIED:
|
|
case NUM_NL80211_IFTYPES:
|
|
case NL80211_IFTYPE_P2P_CLIENT:
|
|
case NL80211_IFTYPE_P2P_GO:
|
|
WARN_ON(1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
ieee80211_recalc_ps(local, -1);
|
|
|
|
/*
|
|
* The sta might be in psm against the ap (e.g. because
|
|
* this was the state before a hw restart), so we
|
|
* explicitly send a null packet in order to make sure
|
|
* it'll sync against the ap (and get out of psm).
|
|
*/
|
|
if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
if (sdata->vif.type != NL80211_IFTYPE_STATION)
|
|
continue;
|
|
if (!sdata->u.mgd.associated)
|
|
continue;
|
|
|
|
ieee80211_send_nullfunc(local, sdata, 0);
|
|
}
|
|
}
|
|
|
|
/* APs are now beaconing, add back stations */
|
|
mutex_lock(&local->sta_mtx);
|
|
list_for_each_entry(sta, &local->sta_list, list) {
|
|
enum ieee80211_sta_state state;
|
|
|
|
if (!sta->uploaded)
|
|
continue;
|
|
|
|
if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
|
|
continue;
|
|
|
|
for (state = IEEE80211_STA_NOTEXIST;
|
|
state < sta->sta_state; state++)
|
|
WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
|
|
state + 1));
|
|
}
|
|
mutex_unlock(&local->sta_mtx);
|
|
|
|
/* add back keys */
|
|
list_for_each_entry(sdata, &local->interfaces, list)
|
|
if (ieee80211_sdata_running(sdata))
|
|
ieee80211_enable_keys(sdata);
|
|
|
|
wake_up:
|
|
local->in_reconfig = false;
|
|
barrier();
|
|
|
|
if (local->monitors == local->open_count && local->monitors > 0)
|
|
ieee80211_add_virtual_monitor(local);
|
|
|
|
/*
|
|
* Clear the WLAN_STA_BLOCK_BA flag so new aggregation
|
|
* sessions can be established after a resume.
|
|
*
|
|
* Also tear down aggregation sessions since reconfiguring
|
|
* them in a hardware restart scenario is not easily done
|
|
* right now, and the hardware will have lost information
|
|
* about the sessions, but we and the AP still think they
|
|
* are active. This is really a workaround though.
|
|
*/
|
|
if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
|
|
mutex_lock(&local->sta_mtx);
|
|
|
|
list_for_each_entry(sta, &local->sta_list, list) {
|
|
ieee80211_sta_tear_down_BA_sessions(
|
|
sta, AGG_STOP_LOCAL_REQUEST);
|
|
clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
|
|
}
|
|
|
|
mutex_unlock(&local->sta_mtx);
|
|
}
|
|
|
|
ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
|
|
IEEE80211_QUEUE_STOP_REASON_SUSPEND);
|
|
|
|
/*
|
|
* Reconfigure sched scan if it was interrupted by FW restart or
|
|
* suspend.
|
|
*/
|
|
mutex_lock(&local->mtx);
|
|
sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
|
|
lockdep_is_held(&local->mtx));
|
|
if (sched_scan_sdata && local->sched_scan_req)
|
|
/*
|
|
* Sched scan stopped, but we don't want to report it. Instead,
|
|
* we're trying to reschedule.
|
|
*/
|
|
if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
|
|
local->sched_scan_req))
|
|
sched_scan_stopped = true;
|
|
mutex_unlock(&local->mtx);
|
|
|
|
if (sched_scan_stopped)
|
|
cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
|
|
|
|
/*
|
|
* If this is for hw restart things are still running.
|
|
* We may want to change that later, however.
|
|
*/
|
|
if (!local->suspended || reconfig_due_to_wowlan)
|
|
drv_restart_complete(local);
|
|
|
|
if (!local->suspended)
|
|
return 0;
|
|
|
|
#ifdef CONFIG_PM
|
|
/* first set suspended false, then resuming */
|
|
local->suspended = false;
|
|
mb();
|
|
local->resuming = false;
|
|
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
if (!ieee80211_sdata_running(sdata))
|
|
continue;
|
|
if (sdata->vif.type == NL80211_IFTYPE_STATION)
|
|
ieee80211_sta_restart(sdata);
|
|
}
|
|
|
|
mod_timer(&local->sta_cleanup, jiffies + 1);
|
|
#else
|
|
WARN_ON(1);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata;
|
|
struct ieee80211_local *local;
|
|
struct ieee80211_key *key;
|
|
|
|
if (WARN_ON(!vif))
|
|
return;
|
|
|
|
sdata = vif_to_sdata(vif);
|
|
local = sdata->local;
|
|
|
|
if (WARN_ON(!local->resuming))
|
|
return;
|
|
|
|
if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
|
|
return;
|
|
|
|
sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
|
|
|
|
mutex_lock(&local->key_mtx);
|
|
list_for_each_entry(key, &sdata->key_list, list)
|
|
key->flags |= KEY_FLAG_TAINTED;
|
|
mutex_unlock(&local->key_mtx);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
|
|
|
|
void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_chanctx_conf *chanctx_conf;
|
|
struct ieee80211_chanctx *chanctx;
|
|
|
|
mutex_lock(&local->chanctx_mtx);
|
|
|
|
chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
|
|
lockdep_is_held(&local->chanctx_mtx));
|
|
|
|
if (WARN_ON_ONCE(!chanctx_conf))
|
|
goto unlock;
|
|
|
|
chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
|
|
ieee80211_recalc_smps_chanctx(local, chanctx);
|
|
unlock:
|
|
mutex_unlock(&local->chanctx_mtx);
|
|
}
|
|
|
|
void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_chanctx_conf *chanctx_conf;
|
|
struct ieee80211_chanctx *chanctx;
|
|
|
|
mutex_lock(&local->chanctx_mtx);
|
|
|
|
chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
|
|
lockdep_is_held(&local->chanctx_mtx));
|
|
|
|
if (WARN_ON_ONCE(!chanctx_conf))
|
|
goto unlock;
|
|
|
|
chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
|
|
ieee80211_recalc_chanctx_min_def(local, chanctx);
|
|
unlock:
|
|
mutex_unlock(&local->chanctx_mtx);
|
|
}
|
|
|
|
static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < n_ids; i++)
|
|
if (ids[i] == id)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* ieee80211_ie_split - split an IE buffer according to ordering
|
|
*
|
|
* @ies: the IE buffer
|
|
* @ielen: the length of the IE buffer
|
|
* @ids: an array with element IDs that are allowed before
|
|
* the split
|
|
* @n_ids: the size of the element ID array
|
|
* @offset: offset where to start splitting in the buffer
|
|
*
|
|
* This function splits an IE buffer by updating the @offset
|
|
* variable to point to the location where the buffer should be
|
|
* split.
|
|
*
|
|
* It assumes that the given IE buffer is well-formed, this
|
|
* has to be guaranteed by the caller!
|
|
*
|
|
* It also assumes that the IEs in the buffer are ordered
|
|
* correctly, if not the result of using this function will not
|
|
* be ordered correctly either, i.e. it does no reordering.
|
|
*
|
|
* The function returns the offset where the next part of the
|
|
* buffer starts, which may be @ielen if the entire (remainder)
|
|
* of the buffer should be used.
|
|
*/
|
|
size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
|
|
const u8 *ids, int n_ids, size_t offset)
|
|
{
|
|
size_t pos = offset;
|
|
|
|
while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
|
|
pos += 2 + ies[pos + 1];
|
|
|
|
return pos;
|
|
}
|
|
|
|
size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
|
|
{
|
|
size_t pos = offset;
|
|
|
|
while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
|
|
pos += 2 + ies[pos + 1];
|
|
|
|
return pos;
|
|
}
|
|
|
|
static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
|
|
int rssi_min_thold,
|
|
int rssi_max_thold)
|
|
{
|
|
trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
|
|
|
|
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
|
|
return;
|
|
|
|
/*
|
|
* Scale up threshold values before storing it, as the RSSI averaging
|
|
* algorithm uses a scaled up value as well. Change this scaling
|
|
* factor if the RSSI averaging algorithm changes.
|
|
*/
|
|
sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
|
|
sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
|
|
}
|
|
|
|
void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
|
|
int rssi_min_thold,
|
|
int rssi_max_thold)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
|
|
WARN_ON(rssi_min_thold == rssi_max_thold ||
|
|
rssi_min_thold > rssi_max_thold);
|
|
|
|
_ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
|
|
rssi_max_thold);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
|
|
|
|
void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
|
|
_ieee80211_enable_rssi_reports(sdata, 0, 0);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
|
|
|
|
u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
|
|
u16 cap)
|
|
{
|
|
__le16 tmp;
|
|
|
|
*pos++ = WLAN_EID_HT_CAPABILITY;
|
|
*pos++ = sizeof(struct ieee80211_ht_cap);
|
|
memset(pos, 0, sizeof(struct ieee80211_ht_cap));
|
|
|
|
/* capability flags */
|
|
tmp = cpu_to_le16(cap);
|
|
memcpy(pos, &tmp, sizeof(u16));
|
|
pos += sizeof(u16);
|
|
|
|
/* AMPDU parameters */
|
|
*pos++ = ht_cap->ampdu_factor |
|
|
(ht_cap->ampdu_density <<
|
|
IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
|
|
|
|
/* MCS set */
|
|
memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
|
|
pos += sizeof(ht_cap->mcs);
|
|
|
|
/* extended capabilities */
|
|
pos += sizeof(__le16);
|
|
|
|
/* BF capabilities */
|
|
pos += sizeof(__le32);
|
|
|
|
/* antenna selection */
|
|
pos += sizeof(u8);
|
|
|
|
return pos;
|
|
}
|
|
|
|
u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
|
|
u32 cap)
|
|
{
|
|
__le32 tmp;
|
|
|
|
*pos++ = WLAN_EID_VHT_CAPABILITY;
|
|
*pos++ = sizeof(struct ieee80211_vht_cap);
|
|
memset(pos, 0, sizeof(struct ieee80211_vht_cap));
|
|
|
|
/* capability flags */
|
|
tmp = cpu_to_le32(cap);
|
|
memcpy(pos, &tmp, sizeof(u32));
|
|
pos += sizeof(u32);
|
|
|
|
/* VHT MCS set */
|
|
memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
|
|
pos += sizeof(vht_cap->vht_mcs);
|
|
|
|
return pos;
|
|
}
|
|
|
|
u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
|
|
const struct cfg80211_chan_def *chandef,
|
|
u16 prot_mode)
|
|
{
|
|
struct ieee80211_ht_operation *ht_oper;
|
|
/* Build HT Information */
|
|
*pos++ = WLAN_EID_HT_OPERATION;
|
|
*pos++ = sizeof(struct ieee80211_ht_operation);
|
|
ht_oper = (struct ieee80211_ht_operation *)pos;
|
|
ht_oper->primary_chan = ieee80211_frequency_to_channel(
|
|
chandef->chan->center_freq);
|
|
switch (chandef->width) {
|
|
case NL80211_CHAN_WIDTH_160:
|
|
case NL80211_CHAN_WIDTH_80P80:
|
|
case NL80211_CHAN_WIDTH_80:
|
|
case NL80211_CHAN_WIDTH_40:
|
|
if (chandef->center_freq1 > chandef->chan->center_freq)
|
|
ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
|
|
else
|
|
ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
|
|
break;
|
|
default:
|
|
ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
|
|
break;
|
|
}
|
|
if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
|
|
chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
|
|
chandef->width != NL80211_CHAN_WIDTH_20)
|
|
ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
|
|
|
|
ht_oper->operation_mode = cpu_to_le16(prot_mode);
|
|
ht_oper->stbc_param = 0x0000;
|
|
|
|
/* It seems that Basic MCS set and Supported MCS set
|
|
are identical for the first 10 bytes */
|
|
memset(&ht_oper->basic_set, 0, 16);
|
|
memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
|
|
|
|
return pos + sizeof(struct ieee80211_ht_operation);
|
|
}
|
|
|
|
void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
|
|
const struct ieee80211_ht_operation *ht_oper,
|
|
struct cfg80211_chan_def *chandef)
|
|
{
|
|
enum nl80211_channel_type channel_type;
|
|
|
|
if (!ht_oper) {
|
|
cfg80211_chandef_create(chandef, control_chan,
|
|
NL80211_CHAN_NO_HT);
|
|
return;
|
|
}
|
|
|
|
switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
|
|
case IEEE80211_HT_PARAM_CHA_SEC_NONE:
|
|
channel_type = NL80211_CHAN_HT20;
|
|
break;
|
|
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
|
|
channel_type = NL80211_CHAN_HT40PLUS;
|
|
break;
|
|
case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
|
|
channel_type = NL80211_CHAN_HT40MINUS;
|
|
break;
|
|
default:
|
|
channel_type = NL80211_CHAN_NO_HT;
|
|
}
|
|
|
|
cfg80211_chandef_create(chandef, control_chan, channel_type);
|
|
}
|
|
|
|
int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
|
|
const struct ieee80211_supported_band *sband,
|
|
const u8 *srates, int srates_len, u32 *rates)
|
|
{
|
|
u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
|
|
int shift = ieee80211_chandef_get_shift(chandef);
|
|
struct ieee80211_rate *br;
|
|
int brate, rate, i, j, count = 0;
|
|
|
|
*rates = 0;
|
|
|
|
for (i = 0; i < srates_len; i++) {
|
|
rate = srates[i] & 0x7f;
|
|
|
|
for (j = 0; j < sband->n_bitrates; j++) {
|
|
br = &sband->bitrates[j];
|
|
if ((rate_flags & br->flags) != rate_flags)
|
|
continue;
|
|
|
|
brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
|
|
if (brate == rate) {
|
|
*rates |= BIT(j);
|
|
count++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return count;
|
|
}
|
|
|
|
int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb, bool need_basic,
|
|
enum ieee80211_band band)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_supported_band *sband;
|
|
int rate, shift;
|
|
u8 i, rates, *pos;
|
|
u32 basic_rates = sdata->vif.bss_conf.basic_rates;
|
|
u32 rate_flags;
|
|
|
|
shift = ieee80211_vif_get_shift(&sdata->vif);
|
|
rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
|
|
sband = local->hw.wiphy->bands[band];
|
|
rates = 0;
|
|
for (i = 0; i < sband->n_bitrates; i++) {
|
|
if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
|
|
continue;
|
|
rates++;
|
|
}
|
|
if (rates > 8)
|
|
rates = 8;
|
|
|
|
if (skb_tailroom(skb) < rates + 2)
|
|
return -ENOMEM;
|
|
|
|
pos = skb_put(skb, rates + 2);
|
|
*pos++ = WLAN_EID_SUPP_RATES;
|
|
*pos++ = rates;
|
|
for (i = 0; i < rates; i++) {
|
|
u8 basic = 0;
|
|
if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
|
|
continue;
|
|
|
|
if (need_basic && basic_rates & BIT(i))
|
|
basic = 0x80;
|
|
rate = sband->bitrates[i].bitrate;
|
|
rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
|
|
5 * (1 << shift));
|
|
*pos++ = basic | (u8) rate;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb, bool need_basic,
|
|
enum ieee80211_band band)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_supported_band *sband;
|
|
int rate, shift;
|
|
u8 i, exrates, *pos;
|
|
u32 basic_rates = sdata->vif.bss_conf.basic_rates;
|
|
u32 rate_flags;
|
|
|
|
rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
|
|
shift = ieee80211_vif_get_shift(&sdata->vif);
|
|
|
|
sband = local->hw.wiphy->bands[band];
|
|
exrates = 0;
|
|
for (i = 0; i < sband->n_bitrates; i++) {
|
|
if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
|
|
continue;
|
|
exrates++;
|
|
}
|
|
|
|
if (exrates > 8)
|
|
exrates -= 8;
|
|
else
|
|
exrates = 0;
|
|
|
|
if (skb_tailroom(skb) < exrates + 2)
|
|
return -ENOMEM;
|
|
|
|
if (exrates) {
|
|
pos = skb_put(skb, exrates + 2);
|
|
*pos++ = WLAN_EID_EXT_SUPP_RATES;
|
|
*pos++ = exrates;
|
|
for (i = 8; i < sband->n_bitrates; i++) {
|
|
u8 basic = 0;
|
|
if ((rate_flags & sband->bitrates[i].flags)
|
|
!= rate_flags)
|
|
continue;
|
|
if (need_basic && basic_rates & BIT(i))
|
|
basic = 0x80;
|
|
rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
|
|
5 * (1 << shift));
|
|
*pos++ = basic | (u8) rate;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ieee80211_ave_rssi(struct ieee80211_vif *vif)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
|
|
/* non-managed type inferfaces */
|
|
return 0;
|
|
}
|
|
return ifmgd->ave_beacon_signal / 16;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
|
|
|
|
u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
|
|
{
|
|
if (!mcs)
|
|
return 1;
|
|
|
|
/* TODO: consider rx_highest */
|
|
|
|
if (mcs->rx_mask[3])
|
|
return 4;
|
|
if (mcs->rx_mask[2])
|
|
return 3;
|
|
if (mcs->rx_mask[1])
|
|
return 2;
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* ieee80211_calculate_rx_timestamp - calculate timestamp in frame
|
|
* @local: mac80211 hw info struct
|
|
* @status: RX status
|
|
* @mpdu_len: total MPDU length (including FCS)
|
|
* @mpdu_offset: offset into MPDU to calculate timestamp at
|
|
*
|
|
* This function calculates the RX timestamp at the given MPDU offset, taking
|
|
* into account what the RX timestamp was. An offset of 0 will just normalize
|
|
* the timestamp to TSF at beginning of MPDU reception.
|
|
*/
|
|
u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
|
|
struct ieee80211_rx_status *status,
|
|
unsigned int mpdu_len,
|
|
unsigned int mpdu_offset)
|
|
{
|
|
u64 ts = status->mactime;
|
|
struct rate_info ri;
|
|
u16 rate;
|
|
|
|
if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
|
|
return 0;
|
|
|
|
memset(&ri, 0, sizeof(ri));
|
|
|
|
/* Fill cfg80211 rate info */
|
|
if (status->flag & RX_FLAG_HT) {
|
|
ri.mcs = status->rate_idx;
|
|
ri.flags |= RATE_INFO_FLAGS_MCS;
|
|
if (status->flag & RX_FLAG_40MHZ)
|
|
ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
|
|
if (status->flag & RX_FLAG_SHORT_GI)
|
|
ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
|
|
} else if (status->flag & RX_FLAG_VHT) {
|
|
ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
|
|
ri.mcs = status->rate_idx;
|
|
ri.nss = status->vht_nss;
|
|
if (status->flag & RX_FLAG_40MHZ)
|
|
ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
|
|
if (status->vht_flag & RX_VHT_FLAG_80MHZ)
|
|
ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
|
|
if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
|
|
ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
|
|
if (status->vht_flag & RX_VHT_FLAG_160MHZ)
|
|
ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
|
|
if (status->flag & RX_FLAG_SHORT_GI)
|
|
ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
|
|
} else {
|
|
struct ieee80211_supported_band *sband;
|
|
int shift = 0;
|
|
int bitrate;
|
|
|
|
if (status->flag & RX_FLAG_10MHZ)
|
|
shift = 1;
|
|
if (status->flag & RX_FLAG_5MHZ)
|
|
shift = 2;
|
|
|
|
sband = local->hw.wiphy->bands[status->band];
|
|
bitrate = sband->bitrates[status->rate_idx].bitrate;
|
|
ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
|
|
}
|
|
|
|
rate = cfg80211_calculate_bitrate(&ri);
|
|
if (WARN_ONCE(!rate,
|
|
"Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
|
|
status->flag, status->rate_idx, status->vht_nss))
|
|
return 0;
|
|
|
|
/* rewind from end of MPDU */
|
|
if (status->flag & RX_FLAG_MACTIME_END)
|
|
ts -= mpdu_len * 8 * 10 / rate;
|
|
|
|
ts += mpdu_offset * 8 * 10 / rate;
|
|
|
|
return ts;
|
|
}
|
|
|
|
void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata;
|
|
struct cfg80211_chan_def chandef;
|
|
|
|
mutex_lock(&local->mtx);
|
|
mutex_lock(&local->iflist_mtx);
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
/* it might be waiting for the local->mtx, but then
|
|
* by the time it gets it, sdata->wdev.cac_started
|
|
* will no longer be true
|
|
*/
|
|
cancel_delayed_work(&sdata->dfs_cac_timer_work);
|
|
|
|
if (sdata->wdev.cac_started) {
|
|
chandef = sdata->vif.bss_conf.chandef;
|
|
ieee80211_vif_release_channel(sdata);
|
|
cfg80211_cac_event(sdata->dev,
|
|
&chandef,
|
|
NL80211_RADAR_CAC_ABORTED,
|
|
GFP_KERNEL);
|
|
}
|
|
}
|
|
mutex_unlock(&local->iflist_mtx);
|
|
mutex_unlock(&local->mtx);
|
|
}
|
|
|
|
void ieee80211_dfs_radar_detected_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_local *local =
|
|
container_of(work, struct ieee80211_local, radar_detected_work);
|
|
struct cfg80211_chan_def chandef = local->hw.conf.chandef;
|
|
|
|
ieee80211_dfs_cac_cancel(local);
|
|
|
|
if (local->use_chanctx)
|
|
/* currently not handled */
|
|
WARN_ON(1);
|
|
else
|
|
cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
|
|
}
|
|
|
|
void ieee80211_radar_detected(struct ieee80211_hw *hw)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
trace_api_radar_detected(local);
|
|
|
|
ieee80211_queue_work(hw, &local->radar_detected_work);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_radar_detected);
|
|
|
|
u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
|
|
{
|
|
u32 ret;
|
|
int tmp;
|
|
|
|
switch (c->width) {
|
|
case NL80211_CHAN_WIDTH_20:
|
|
c->width = NL80211_CHAN_WIDTH_20_NOHT;
|
|
ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
|
|
break;
|
|
case NL80211_CHAN_WIDTH_40:
|
|
c->width = NL80211_CHAN_WIDTH_20;
|
|
c->center_freq1 = c->chan->center_freq;
|
|
ret = IEEE80211_STA_DISABLE_40MHZ |
|
|
IEEE80211_STA_DISABLE_VHT;
|
|
break;
|
|
case NL80211_CHAN_WIDTH_80:
|
|
tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
|
|
/* n_P40 */
|
|
tmp /= 2;
|
|
/* freq_P40 */
|
|
c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
|
|
c->width = NL80211_CHAN_WIDTH_40;
|
|
ret = IEEE80211_STA_DISABLE_VHT;
|
|
break;
|
|
case NL80211_CHAN_WIDTH_80P80:
|
|
c->center_freq2 = 0;
|
|
c->width = NL80211_CHAN_WIDTH_80;
|
|
ret = IEEE80211_STA_DISABLE_80P80MHZ |
|
|
IEEE80211_STA_DISABLE_160MHZ;
|
|
break;
|
|
case NL80211_CHAN_WIDTH_160:
|
|
/* n_P20 */
|
|
tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
|
|
/* n_P80 */
|
|
tmp /= 4;
|
|
c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
|
|
c->width = NL80211_CHAN_WIDTH_80;
|
|
ret = IEEE80211_STA_DISABLE_80P80MHZ |
|
|
IEEE80211_STA_DISABLE_160MHZ;
|
|
break;
|
|
default:
|
|
case NL80211_CHAN_WIDTH_20_NOHT:
|
|
WARN_ON_ONCE(1);
|
|
c->width = NL80211_CHAN_WIDTH_20_NOHT;
|
|
ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
|
|
break;
|
|
case NL80211_CHAN_WIDTH_5:
|
|
case NL80211_CHAN_WIDTH_10:
|
|
WARN_ON_ONCE(1);
|
|
/* keep c->width */
|
|
ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
|
|
break;
|
|
}
|
|
|
|
WARN_ON_ONCE(!cfg80211_chandef_valid(c));
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Returns true if smps_mode_new is strictly more restrictive than
|
|
* smps_mode_old.
|
|
*/
|
|
bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
|
|
enum ieee80211_smps_mode smps_mode_new)
|
|
{
|
|
if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
|
|
smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
|
|
return false;
|
|
|
|
switch (smps_mode_old) {
|
|
case IEEE80211_SMPS_STATIC:
|
|
return false;
|
|
case IEEE80211_SMPS_DYNAMIC:
|
|
return smps_mode_new == IEEE80211_SMPS_STATIC;
|
|
case IEEE80211_SMPS_OFF:
|
|
return smps_mode_new != IEEE80211_SMPS_OFF;
|
|
default:
|
|
WARN_ON(1);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_csa_settings *csa_settings)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct ieee80211_mgmt *mgmt;
|
|
struct ieee80211_local *local = sdata->local;
|
|
int freq;
|
|
int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
|
|
sizeof(mgmt->u.action.u.chan_switch);
|
|
u8 *pos;
|
|
|
|
if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
|
|
sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
|
|
return -EOPNOTSUPP;
|
|
|
|
skb = dev_alloc_skb(local->tx_headroom + hdr_len +
|
|
5 + /* channel switch announcement element */
|
|
3 + /* secondary channel offset element */
|
|
8); /* mesh channel switch parameters element */
|
|
if (!skb)
|
|
return -ENOMEM;
|
|
|
|
skb_reserve(skb, local->tx_headroom);
|
|
mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
|
|
memset(mgmt, 0, hdr_len);
|
|
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
|
|
IEEE80211_STYPE_ACTION);
|
|
|
|
eth_broadcast_addr(mgmt->da);
|
|
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
|
|
if (ieee80211_vif_is_mesh(&sdata->vif)) {
|
|
memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
|
|
} else {
|
|
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
|
|
memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
|
|
}
|
|
mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
|
|
mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
|
|
pos = skb_put(skb, 5);
|
|
*pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
|
|
*pos++ = 3; /* IE length */
|
|
*pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
|
|
freq = csa_settings->chandef.chan->center_freq;
|
|
*pos++ = ieee80211_frequency_to_channel(freq); /* channel */
|
|
*pos++ = csa_settings->count; /* count */
|
|
|
|
if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
|
|
enum nl80211_channel_type ch_type;
|
|
|
|
skb_put(skb, 3);
|
|
*pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
|
|
*pos++ = 1; /* IE length */
|
|
ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
|
|
if (ch_type == NL80211_CHAN_HT40PLUS)
|
|
*pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
|
|
else
|
|
*pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
|
|
}
|
|
|
|
if (ieee80211_vif_is_mesh(&sdata->vif)) {
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
|
|
skb_put(skb, 8);
|
|
*pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
|
|
*pos++ = 6; /* IE length */
|
|
*pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
|
|
*pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
|
|
*pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
|
|
*pos++ |= csa_settings->block_tx ?
|
|
WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
|
|
put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
|
|
pos += 2;
|
|
put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
|
|
pos += 2;
|
|
}
|
|
|
|
ieee80211_tx_skb(sdata, skb);
|
|
return 0;
|
|
}
|
|
|
|
bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
|
|
{
|
|
return !(cs == NULL || cs->cipher == 0 ||
|
|
cs->hdr_len < cs->pn_len + cs->pn_off ||
|
|
cs->hdr_len <= cs->key_idx_off ||
|
|
cs->key_idx_shift > 7 ||
|
|
cs->key_idx_mask == 0);
|
|
}
|
|
|
|
bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
|
|
{
|
|
int i;
|
|
|
|
/* Ensure we have enough iftype bitmap space for all iftype values */
|
|
WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
|
|
|
|
for (i = 0; i < n; i++)
|
|
if (!ieee80211_cs_valid(&cs[i]))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
const struct ieee80211_cipher_scheme *
|
|
ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
|
|
enum nl80211_iftype iftype)
|
|
{
|
|
const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
|
|
int n = local->hw.n_cipher_schemes;
|
|
int i;
|
|
const struct ieee80211_cipher_scheme *cs = NULL;
|
|
|
|
for (i = 0; i < n; i++) {
|
|
if (l[i].cipher == cipher) {
|
|
cs = &l[i];
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!cs || !(cs->iftype & BIT(iftype)))
|
|
return NULL;
|
|
|
|
return cs;
|
|
}
|
|
|
|
int ieee80211_cs_headroom(struct ieee80211_local *local,
|
|
struct cfg80211_crypto_settings *crypto,
|
|
enum nl80211_iftype iftype)
|
|
{
|
|
const struct ieee80211_cipher_scheme *cs;
|
|
int headroom = IEEE80211_ENCRYPT_HEADROOM;
|
|
int i;
|
|
|
|
for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
|
|
cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
|
|
iftype);
|
|
|
|
if (cs && headroom < cs->hdr_len)
|
|
headroom = cs->hdr_len;
|
|
}
|
|
|
|
cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
|
|
if (cs && headroom < cs->hdr_len)
|
|
headroom = cs->hdr_len;
|
|
|
|
return headroom;
|
|
}
|
|
|
|
static bool
|
|
ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
|
|
{
|
|
s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
|
|
int skip;
|
|
|
|
if (end > 0)
|
|
return false;
|
|
|
|
/* End time is in the past, check for repetitions */
|
|
skip = DIV_ROUND_UP(-end, data->desc[i].interval);
|
|
if (data->count[i] < 255) {
|
|
if (data->count[i] <= skip) {
|
|
data->count[i] = 0;
|
|
return false;
|
|
}
|
|
|
|
data->count[i] -= skip;
|
|
}
|
|
|
|
data->desc[i].start += skip * data->desc[i].interval;
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
|
|
s32 *offset)
|
|
{
|
|
bool ret = false;
|
|
int i;
|
|
|
|
for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
|
|
s32 cur;
|
|
|
|
if (!data->count[i])
|
|
continue;
|
|
|
|
if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
|
|
ret = true;
|
|
|
|
cur = data->desc[i].start - tsf;
|
|
if (cur > *offset)
|
|
continue;
|
|
|
|
cur = data->desc[i].start + data->desc[i].duration - tsf;
|
|
if (cur > *offset)
|
|
*offset = cur;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static u32
|
|
ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
|
|
{
|
|
s32 offset = 0;
|
|
int tries = 0;
|
|
/*
|
|
* arbitrary limit, used to avoid infinite loops when combined NoA
|
|
* descriptors cover the full time period.
|
|
*/
|
|
int max_tries = 5;
|
|
|
|
ieee80211_extend_absent_time(data, tsf, &offset);
|
|
do {
|
|
if (!ieee80211_extend_absent_time(data, tsf, &offset))
|
|
break;
|
|
|
|
tries++;
|
|
} while (tries < max_tries);
|
|
|
|
return offset;
|
|
}
|
|
|
|
void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
|
|
{
|
|
u32 next_offset = BIT(31) - 1;
|
|
int i;
|
|
|
|
data->absent = 0;
|
|
data->has_next_tsf = false;
|
|
for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
|
|
s32 start;
|
|
|
|
if (!data->count[i])
|
|
continue;
|
|
|
|
ieee80211_extend_noa_desc(data, tsf, i);
|
|
start = data->desc[i].start - tsf;
|
|
if (start <= 0)
|
|
data->absent |= BIT(i);
|
|
|
|
if (next_offset > start)
|
|
next_offset = start;
|
|
|
|
data->has_next_tsf = true;
|
|
}
|
|
|
|
if (data->absent)
|
|
next_offset = ieee80211_get_noa_absent_time(data, tsf);
|
|
|
|
data->next_tsf = tsf + next_offset;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_update_p2p_noa);
|
|
|
|
int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
|
|
struct ieee80211_noa_data *data, u32 tsf)
|
|
{
|
|
int ret = 0;
|
|
int i;
|
|
|
|
memset(data, 0, sizeof(*data));
|
|
|
|
for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
|
|
const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
|
|
|
|
if (!desc->count || !desc->duration)
|
|
continue;
|
|
|
|
data->count[i] = desc->count;
|
|
data->desc[i].start = le32_to_cpu(desc->start_time);
|
|
data->desc[i].duration = le32_to_cpu(desc->duration);
|
|
data->desc[i].interval = le32_to_cpu(desc->interval);
|
|
|
|
if (data->count[i] > 1 &&
|
|
data->desc[i].interval < data->desc[i].duration)
|
|
continue;
|
|
|
|
ieee80211_extend_noa_desc(data, tsf, i);
|
|
ret++;
|
|
}
|
|
|
|
if (ret)
|
|
ieee80211_update_p2p_noa(data, tsf);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
|
|
|
|
void ieee80211_recalc_dtim(struct ieee80211_local *local,
|
|
struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
u64 tsf = drv_get_tsf(local, sdata);
|
|
u64 dtim_count = 0;
|
|
u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
|
|
u8 dtim_period = sdata->vif.bss_conf.dtim_period;
|
|
struct ps_data *ps;
|
|
u8 bcns_from_dtim;
|
|
|
|
if (tsf == -1ULL || !beacon_int || !dtim_period)
|
|
return;
|
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP ||
|
|
sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
|
|
if (!sdata->bss)
|
|
return;
|
|
|
|
ps = &sdata->bss->ps;
|
|
} else if (ieee80211_vif_is_mesh(&sdata->vif)) {
|
|
ps = &sdata->u.mesh.ps;
|
|
} else {
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* actually finds last dtim_count, mac80211 will update in
|
|
* __beacon_add_tim().
|
|
* dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
|
|
*/
|
|
do_div(tsf, beacon_int);
|
|
bcns_from_dtim = do_div(tsf, dtim_period);
|
|
/* just had a DTIM */
|
|
if (!bcns_from_dtim)
|
|
dtim_count = 0;
|
|
else
|
|
dtim_count = dtim_period - bcns_from_dtim;
|
|
|
|
ps->dtim_count = dtim_count;
|
|
}
|
|
|
|
int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
|
|
const struct cfg80211_chan_def *chandef,
|
|
enum ieee80211_chanctx_mode chanmode,
|
|
u8 radar_detect)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_sub_if_data *sdata_iter;
|
|
enum nl80211_iftype iftype = sdata->wdev.iftype;
|
|
int num[NUM_NL80211_IFTYPES];
|
|
struct ieee80211_chanctx *ctx;
|
|
int num_different_channels = 0;
|
|
int total = 1;
|
|
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
if (WARN_ON(hweight32(radar_detect) > 1))
|
|
return -EINVAL;
|
|
|
|
if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
|
|
!chandef->chan))
|
|
return -EINVAL;
|
|
|
|
if (chandef)
|
|
num_different_channels = 1;
|
|
|
|
if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
|
|
return -EINVAL;
|
|
|
|
/* Always allow software iftypes */
|
|
if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
|
|
if (radar_detect)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
memset(num, 0, sizeof(num));
|
|
|
|
if (iftype != NL80211_IFTYPE_UNSPECIFIED)
|
|
num[iftype] = 1;
|
|
|
|
list_for_each_entry(ctx, &local->chanctx_list, list) {
|
|
if (ctx->conf.radar_enabled)
|
|
radar_detect |= BIT(ctx->conf.def.width);
|
|
if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
|
|
num_different_channels++;
|
|
continue;
|
|
}
|
|
if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
|
|
cfg80211_chandef_compatible(chandef,
|
|
&ctx->conf.def))
|
|
continue;
|
|
num_different_channels++;
|
|
}
|
|
|
|
list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
|
|
struct wireless_dev *wdev_iter;
|
|
|
|
wdev_iter = &sdata_iter->wdev;
|
|
|
|
if (sdata_iter == sdata ||
|
|
rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
|
|
local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
|
|
continue;
|
|
|
|
num[wdev_iter->iftype]++;
|
|
total++;
|
|
}
|
|
|
|
if (total == 1 && !radar_detect)
|
|
return 0;
|
|
|
|
return cfg80211_check_combinations(local->hw.wiphy,
|
|
num_different_channels,
|
|
radar_detect, num);
|
|
}
|
|
|
|
static void
|
|
ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
|
|
void *data)
|
|
{
|
|
u32 *max_num_different_channels = data;
|
|
|
|
*max_num_different_channels = max(*max_num_different_channels,
|
|
c->num_different_channels);
|
|
}
|
|
|
|
int ieee80211_max_num_channels(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata;
|
|
int num[NUM_NL80211_IFTYPES] = {};
|
|
struct ieee80211_chanctx *ctx;
|
|
int num_different_channels = 0;
|
|
u8 radar_detect = 0;
|
|
u32 max_num_different_channels = 1;
|
|
int err;
|
|
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
list_for_each_entry(ctx, &local->chanctx_list, list) {
|
|
num_different_channels++;
|
|
|
|
if (ctx->conf.radar_enabled)
|
|
radar_detect |= BIT(ctx->conf.def.width);
|
|
}
|
|
|
|
list_for_each_entry_rcu(sdata, &local->interfaces, list)
|
|
num[sdata->wdev.iftype]++;
|
|
|
|
err = cfg80211_iter_combinations(local->hw.wiphy,
|
|
num_different_channels, radar_detect,
|
|
num, ieee80211_iter_max_chans,
|
|
&max_num_different_channels);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return max_num_different_channels;
|
|
}
|