1804 lines
45 KiB
C
1804 lines
45 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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void *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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{
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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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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 - 17.5.2: 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; /* 17.3.2.3: T_PREAMBLE = 16 usec */
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dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
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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;
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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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}
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dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
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short_preamble);
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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;
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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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}
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/* CTS duration */
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dur = ieee80211_frame_duration(sband->band, 10, rate->bitrate,
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erp, short_preamble);
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/* Data frame duration */
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dur += ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
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erp, short_preamble);
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/* ACK duration */
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dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
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erp, short_preamble);
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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;
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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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}
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/* Data frame duration */
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dur = ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
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erp, short_preamble);
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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, rate->bitrate,
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erp, short_preamble);
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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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list_for_each_entry_rcu(sdata, &local->interfaces, list) {
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int ac;
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if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
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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 < IEEE80211_NUM_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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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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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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for (ac = 0; ac < IEEE80211_NUM_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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kfree_skb(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_fn(struct ieee80211_local *local,
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struct sk_buff_head *skbs,
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void (*fn)(void *data), void *data)
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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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kfree_skb(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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if (fn)
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fn(data);
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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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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 (i = 0; i < hw->queues; i++)
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__ieee80211_stop_queue(hw, i, 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_queues(struct ieee80211_hw *hw)
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{
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ieee80211_stop_queues_by_reason(hw,
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IEEE80211_QUEUE_STOP_REASON_DRIVER);
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}
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EXPORT_SYMBOL(ieee80211_stop_queues);
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int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
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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 ret;
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if (WARN_ON(queue >= hw->queues))
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return true;
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spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
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ret = !!local->queue_stop_reasons[queue];
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spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
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return ret;
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}
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EXPORT_SYMBOL(ieee80211_queue_stopped);
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void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
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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 (i = 0; i < hw->queues; i++)
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__ieee80211_wake_queue(hw, i, reason);
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|
|
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
|
|
}
|
|
|
|
void ieee80211_wake_queues(struct ieee80211_hw *hw)
|
|
{
|
|
ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_wake_queues);
|
|
|
|
void ieee80211_iterate_active_interfaces(
|
|
struct ieee80211_hw *hw,
|
|
void (*iterator)(void *data, u8 *mac,
|
|
struct ieee80211_vif *vif),
|
|
void *data)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
struct ieee80211_sub_if_data *sdata;
|
|
|
|
mutex_lock(&local->iflist_mtx);
|
|
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
switch (sdata->vif.type) {
|
|
case NL80211_IFTYPE_MONITOR:
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
continue;
|
|
default:
|
|
break;
|
|
}
|
|
if (ieee80211_sdata_running(sdata))
|
|
iterator(data, sdata->vif.addr,
|
|
&sdata->vif);
|
|
}
|
|
|
|
mutex_unlock(&local->iflist_mtx);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
|
|
|
|
void ieee80211_iterate_active_interfaces_atomic(
|
|
struct ieee80211_hw *hw,
|
|
void (*iterator)(void *data, u8 *mac,
|
|
struct ieee80211_vif *vif),
|
|
void *data)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
struct ieee80211_sub_if_data *sdata;
|
|
|
|
rcu_read_lock();
|
|
|
|
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
|
|
switch (sdata->vif.type) {
|
|
case NL80211_IFTYPE_MONITOR:
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
continue;
|
|
default:
|
|
break;
|
|
}
|
|
if (ieee80211_sdata_running(sdata))
|
|
iterator(data, sdata->vif.addr,
|
|
&sdata->vif);
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
}
|
|
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
|
|
|
|
/*
|
|
* 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(u8 *start, size_t len,
|
|
struct ieee802_11_elems *elems,
|
|
u64 filter, u32 crc)
|
|
{
|
|
size_t left = len;
|
|
u8 *pos = start;
|
|
bool calc_crc = filter != 0;
|
|
DECLARE_BITMAP(seen_elems, 256);
|
|
|
|
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;
|
|
}
|
|
|
|
if (id != WLAN_EID_VENDOR_SPECIFIC &&
|
|
id != WLAN_EID_QUIET &&
|
|
test_bit(id, seen_elems)) {
|
|
elems->parse_error = true;
|
|
left -= elen;
|
|
pos += elen;
|
|
continue;
|
|
}
|
|
|
|
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_FH_PARAMS:
|
|
elems->fh_params = pos;
|
|
elems->fh_params_len = elen;
|
|
break;
|
|
case WLAN_EID_DS_PARAMS:
|
|
elems->ds_params = pos;
|
|
elems->ds_params_len = elen;
|
|
break;
|
|
case WLAN_EID_CF_PARAMS:
|
|
elems->cf_params = pos;
|
|
elems->cf_params_len = elen;
|
|
break;
|
|
case WLAN_EID_TIM:
|
|
if (elen >= sizeof(struct ieee80211_tim_ie)) {
|
|
elems->tim = (void *)pos;
|
|
elems->tim_len = elen;
|
|
} else
|
|
elem_parse_failed = true;
|
|
break;
|
|
case WLAN_EID_IBSS_PARAMS:
|
|
elems->ibss_params = pos;
|
|
elems->ibss_params_len = elen;
|
|
break;
|
|
case WLAN_EID_CHALLENGE:
|
|
elems->challenge = pos;
|
|
elems->challenge_len = elen;
|
|
break;
|
|
case WLAN_EID_VENDOR_SPECIFIC:
|
|
if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
|
|
pos[2] == 0xf2) {
|
|
/* Microsoft OUI (00:50:F2) */
|
|
|
|
if (calc_crc)
|
|
crc = crc32_be(crc, pos - 2, elen + 2);
|
|
|
|
if (pos[3] == 1) {
|
|
/* OUI Type 1 - WPA IE */
|
|
elems->wpa = pos;
|
|
elems->wpa_len = elen;
|
|
} else if (elen >= 5 && pos[3] == 2) {
|
|
/* OUI Type 2 - WMM IE */
|
|
if (pos[4] == 0) {
|
|
elems->wmm_info = pos;
|
|
elems->wmm_info_len = elen;
|
|
} else if (pos[4] == 1) {
|
|
elems->wmm_param = pos;
|
|
elems->wmm_param_len = elen;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case WLAN_EID_RSN:
|
|
elems->rsn = pos;
|
|
elems->rsn_len = elen;
|
|
break;
|
|
case WLAN_EID_ERP_INFO:
|
|
elems->erp_info = pos;
|
|
elems->erp_info_len = elen;
|
|
break;
|
|
case WLAN_EID_EXT_SUPP_RATES:
|
|
elems->ext_supp_rates = pos;
|
|
elems->ext_supp_rates_len = elen;
|
|
break;
|
|
case WLAN_EID_HT_CAPABILITY:
|
|
if (elen >= sizeof(struct ieee80211_ht_cap))
|
|
elems->ht_cap_elem = (void *)pos;
|
|
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_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_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:
|
|
elems->ch_switch_elem = pos;
|
|
elems->ch_switch_elem_len = elen;
|
|
break;
|
|
case WLAN_EID_QUIET:
|
|
if (!elems->quiet_elem) {
|
|
elems->quiet_elem = pos;
|
|
elems->quiet_elem_len = elen;
|
|
}
|
|
elems->num_of_quiet_elem++;
|
|
break;
|
|
case WLAN_EID_COUNTRY:
|
|
elems->country_elem = pos;
|
|
elems->country_elem_len = elen;
|
|
break;
|
|
case WLAN_EID_PWR_CONSTRAINT:
|
|
elems->pwr_constr_elem = pos;
|
|
elems->pwr_constr_elem_len = elen;
|
|
break;
|
|
case WLAN_EID_TIMEOUT_INTERVAL:
|
|
elems->timeout_int = pos;
|
|
elems->timeout_int_len = elen;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
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 ieee802_11_parse_elems(u8 *start, size_t len,
|
|
struct ieee802_11_elems *elems)
|
|
{
|
|
ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
|
|
}
|
|
|
|
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;
|
|
int ac;
|
|
bool use_11b;
|
|
int aCWmin, aCWmax;
|
|
|
|
if (!local->ops->conf_tx)
|
|
return;
|
|
|
|
if (local->hw.queues < IEEE80211_NUM_ACS)
|
|
return;
|
|
|
|
memset(&qparam, 0, sizeof(qparam));
|
|
|
|
use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
|
|
!(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
|
|
|
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
|
|
/* Set defaults according to 802.11-2007 Table 7-37 */
|
|
aCWmax = 1023;
|
|
if (use_11b)
|
|
aCWmin = 31;
|
|
else
|
|
aCWmin = 15;
|
|
|
|
switch (ac) {
|
|
case IEEE80211_AC_BK:
|
|
qparam.cw_max = aCWmax;
|
|
qparam.cw_min = aCWmin;
|
|
qparam.txop = 0;
|
|
qparam.aifs = 7;
|
|
break;
|
|
default: /* never happens but let's not leave undefined */
|
|
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);
|
|
}
|
|
|
|
/* after reinitialize QoS TX queues setting to default,
|
|
* disable QoS at all */
|
|
|
|
if (sdata->vif.type != NL80211_IFTYPE_MONITOR) {
|
|
sdata->vif.bss_conf.qos =
|
|
sdata->vif.type != NL80211_IFTYPE_STATION;
|
|
if (bss_notify)
|
|
ieee80211_bss_info_change_notify(sdata,
|
|
BSS_CHANGED_QOS);
|
|
}
|
|
}
|
|
|
|
void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
|
|
const size_t supp_rates_len,
|
|
const u8 *supp_rates)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
int i, have_higher_than_11mbit = 0;
|
|
|
|
/* cf. IEEE 802.11 9.2.12 */
|
|
for (i = 0; i < supp_rates_len; i++)
|
|
if ((supp_rates[i] & 0x7f) * 5 > 110)
|
|
have_higher_than_11mbit = 1;
|
|
|
|
if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
|
|
have_higher_than_11mbit)
|
|
sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
|
|
else
|
|
sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
|
|
|
|
ieee80211_set_wmm_default(sdata, true);
|
|
}
|
|
|
|
u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
|
|
enum ieee80211_band band)
|
|
{
|
|
struct ieee80211_supported_band *sband;
|
|
struct ieee80211_rate *bitrates;
|
|
u32 mandatory_rates;
|
|
enum ieee80211_rate_flags mandatory_flag;
|
|
int i;
|
|
|
|
sband = local->hw.wiphy->bands[band];
|
|
if (WARN_ON(!sband))
|
|
return 1;
|
|
|
|
if (band == IEEE80211_BAND_2GHZ)
|
|
mandatory_flag = IEEE80211_RATE_MANDATORY_B;
|
|
else
|
|
mandatory_flag = IEEE80211_RATE_MANDATORY_A;
|
|
|
|
bitrates = sband->bitrates;
|
|
mandatory_rates = 0;
|
|
for (i = 0; i < sband->n_bitrates; i++)
|
|
if (bitrates[i].flags & mandatory_flag)
|
|
mandatory_rates |= BIT(i);
|
|
return mandatory_rates;
|
|
}
|
|
|
|
void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
|
|
u16 transaction, u16 auth_alg,
|
|
u8 *extra, size_t extra_len, const u8 *da,
|
|
const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sk_buff *skb;
|
|
struct ieee80211_mgmt *mgmt;
|
|
int err;
|
|
|
|
skb = dev_alloc_skb(local->hw.extra_tx_headroom +
|
|
sizeof(*mgmt) + 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(0);
|
|
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;
|
|
ieee80211_tx_skb(sdata, skb);
|
|
}
|
|
|
|
int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
|
|
const u8 *ie, size_t ie_len,
|
|
enum ieee80211_band band, u32 rate_mask,
|
|
u8 channel)
|
|
{
|
|
struct ieee80211_supported_band *sband;
|
|
u8 *pos;
|
|
size_t offset = 0, noffset;
|
|
int supp_rates_len, i;
|
|
u8 rates[32];
|
|
int num_rates;
|
|
int ext_rates_len;
|
|
|
|
sband = local->hw.wiphy->bands[band];
|
|
|
|
pos = buffer;
|
|
|
|
num_rates = 0;
|
|
for (i = 0; i < sband->n_bitrates; i++) {
|
|
if ((BIT(i) & rate_mask) == 0)
|
|
continue; /* skip rate */
|
|
rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
|
|
}
|
|
|
|
supp_rates_len = min_t(int, num_rates, 8);
|
|
|
|
*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);
|
|
memcpy(pos, ie + offset, noffset - offset);
|
|
pos += noffset - offset;
|
|
offset = noffset;
|
|
}
|
|
|
|
ext_rates_len = num_rates - supp_rates_len;
|
|
if (ext_rates_len > 0) {
|
|
*pos++ = WLAN_EID_EXT_SUPP_RATES;
|
|
*pos++ = ext_rates_len;
|
|
memcpy(pos, rates + supp_rates_len, ext_rates_len);
|
|
pos += ext_rates_len;
|
|
}
|
|
|
|
if (channel && sband->band == IEEE80211_BAND_2GHZ) {
|
|
*pos++ = WLAN_EID_DS_PARAMS;
|
|
*pos++ = 1;
|
|
*pos++ = channel;
|
|
}
|
|
|
|
/* 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);
|
|
memcpy(pos, ie + offset, noffset - offset);
|
|
pos += noffset - offset;
|
|
offset = noffset;
|
|
}
|
|
|
|
if (sband->ht_cap.ht_supported)
|
|
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.
|
|
*/
|
|
|
|
/* add any remaining custom IEs */
|
|
if (ie && ie_len) {
|
|
noffset = ie_len;
|
|
memcpy(pos, ie + offset, noffset - offset);
|
|
pos += noffset - offset;
|
|
}
|
|
|
|
return pos - buffer;
|
|
}
|
|
|
|
struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
|
|
u8 *dst, u32 ratemask,
|
|
const u8 *ssid, size_t ssid_len,
|
|
const u8 *ie, size_t ie_len,
|
|
bool directed)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sk_buff *skb;
|
|
struct ieee80211_mgmt *mgmt;
|
|
size_t buf_len;
|
|
u8 *buf;
|
|
u8 chan;
|
|
|
|
/* FIXME: come up with a proper value */
|
|
buf = kmalloc(200 + ie_len, GFP_KERNEL);
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
if (directed)
|
|
chan = 0;
|
|
else
|
|
chan = ieee80211_frequency_to_channel(
|
|
local->hw.conf.channel->center_freq);
|
|
|
|
buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len,
|
|
local->hw.conf.channel->band,
|
|
ratemask, chan);
|
|
|
|
skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
|
|
ssid, ssid_len,
|
|
buf, buf_len);
|
|
if (!skb)
|
|
goto out;
|
|
|
|
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;
|
|
|
|
out:
|
|
kfree(buf);
|
|
|
|
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, bool no_cck)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
skb = ieee80211_build_probe_req(sdata, dst, ratemask, ssid, ssid_len,
|
|
ie, ie_len, directed);
|
|
if (skb) {
|
|
if (no_cck)
|
|
IEEE80211_SKB_CB(skb)->flags |=
|
|
IEEE80211_TX_CTL_NO_CCK_RATE;
|
|
ieee80211_tx_skb(sdata, skb);
|
|
}
|
|
}
|
|
|
|
u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
|
|
struct ieee802_11_elems *elems,
|
|
enum ieee80211_band band, u32 *basic_rates)
|
|
{
|
|
struct ieee80211_supported_band *sband;
|
|
struct ieee80211_rate *bitrates;
|
|
size_t num_rates;
|
|
u32 supp_rates;
|
|
int i, j;
|
|
sband = local->hw.wiphy->bands[band];
|
|
|
|
if (WARN_ON(!sband))
|
|
return 1;
|
|
|
|
bitrates = sband->bitrates;
|
|
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++) {
|
|
if (bitrates[j].bitrate == 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);
|
|
}
|
|
|
|
int ieee80211_reconfig(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_hw *hw = &local->hw;
|
|
struct ieee80211_sub_if_data *sdata;
|
|
struct sta_info *sta;
|
|
int res, i;
|
|
|
|
#ifdef CONFIG_PM
|
|
if (local->suspended)
|
|
local->resuming = true;
|
|
|
|
if (local->wowlan) {
|
|
local->wowlan = false;
|
|
res = drv_resume(local);
|
|
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.
|
|
*/
|
|
}
|
|
#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) {
|
|
res = drv_add_interface(local, sdata);
|
|
if (WARN_ON(res)) {
|
|
rcu_assign_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 STAs back */
|
|
mutex_lock(&local->sta_mtx);
|
|
list_for_each_entry(sta, &local->sta_list, list) {
|
|
if (sta->uploaded) {
|
|
enum ieee80211_sta_state state;
|
|
|
|
for (state = IEEE80211_STA_NOTEXIST;
|
|
state < sta->sta_state - 1; 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;
|
|
|
|
switch (sdata->vif.type) {
|
|
case NL80211_IFTYPE_STATION:
|
|
changed |= BSS_CHANGED_ASSOC |
|
|
BSS_CHANGED_ARP_FILTER;
|
|
mutex_lock(&sdata->u.mgd.mtx);
|
|
ieee80211_bss_info_change_notify(sdata, changed);
|
|
mutex_unlock(&sdata->u.mgd.mtx);
|
|
break;
|
|
case NL80211_IFTYPE_ADHOC:
|
|
changed |= BSS_CHANGED_IBSS;
|
|
/* fall through */
|
|
case NL80211_IFTYPE_AP:
|
|
changed |= BSS_CHANGED_SSID;
|
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP)
|
|
changed |= BSS_CHANGED_AP_PROBE_RESP;
|
|
|
|
/* fall through */
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
changed |= BSS_CHANGED_BEACON |
|
|
BSS_CHANGED_BEACON_ENABLED;
|
|
ieee80211_bss_info_change_notify(sdata, changed);
|
|
break;
|
|
case NL80211_IFTYPE_WDS:
|
|
break;
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
case NL80211_IFTYPE_MONITOR:
|
|
/* ignore virtual */
|
|
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;
|
|
|
|
ieee80211_send_nullfunc(local, sdata, 0);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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, true);
|
|
clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
|
|
}
|
|
|
|
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:
|
|
ieee80211_wake_queues_by_reason(hw,
|
|
IEEE80211_QUEUE_STOP_REASON_SUSPEND);
|
|
|
|
/*
|
|
* If this is for hw restart things are still running.
|
|
* We may want to change that later, however.
|
|
*/
|
|
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) {
|
|
switch(sdata->vif.type) {
|
|
case NL80211_IFTYPE_STATION:
|
|
ieee80211_sta_restart(sdata);
|
|
break;
|
|
case NL80211_IFTYPE_ADHOC:
|
|
ieee80211_ibss_restart(sdata);
|
|
break;
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
ieee80211_mesh_restart(sdata);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
mod_timer(&local->sta_cleanup, jiffies + 1);
|
|
|
|
mutex_lock(&local->sta_mtx);
|
|
list_for_each_entry(sta, &local->sta_list, list)
|
|
mesh_plink_restart(sta);
|
|
mutex_unlock(&local->sta_mtx);
|
|
#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);
|
|
|
|
static int check_mgd_smps(struct ieee80211_if_managed *ifmgd,
|
|
enum ieee80211_smps_mode *smps_mode)
|
|
{
|
|
if (ifmgd->associated) {
|
|
*smps_mode = ifmgd->ap_smps;
|
|
|
|
if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) {
|
|
if (ifmgd->powersave)
|
|
*smps_mode = IEEE80211_SMPS_DYNAMIC;
|
|
else
|
|
*smps_mode = IEEE80211_SMPS_OFF;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* must hold iflist_mtx */
|
|
void ieee80211_recalc_smps(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata;
|
|
enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF;
|
|
int count = 0;
|
|
|
|
lockdep_assert_held(&local->iflist_mtx);
|
|
|
|
/*
|
|
* This function could be improved to handle multiple
|
|
* interfaces better, but right now it makes any
|
|
* non-station interfaces force SM PS to be turned
|
|
* off. If there are multiple station interfaces it
|
|
* could also use the best possible mode, e.g. if
|
|
* one is in static and the other in dynamic then
|
|
* dynamic is ok.
|
|
*/
|
|
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
if (!ieee80211_sdata_running(sdata))
|
|
continue;
|
|
if (sdata->vif.type != NL80211_IFTYPE_STATION)
|
|
goto set;
|
|
|
|
count += check_mgd_smps(&sdata->u.mgd, &smps_mode);
|
|
|
|
if (count > 1) {
|
|
smps_mode = IEEE80211_SMPS_OFF;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (smps_mode == local->smps_mode)
|
|
return;
|
|
|
|
set:
|
|
local->smps_mode = smps_mode;
|
|
/* changed flag is auto-detected for this */
|
|
ieee80211_hw_config(local, 0);
|
|
}
|
|
|
|
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_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
|
|
struct ieee80211_channel *channel,
|
|
enum nl80211_channel_type channel_type)
|
|
{
|
|
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(channel->center_freq);
|
|
switch (channel_type) {
|
|
case NL80211_CHAN_HT40MINUS:
|
|
ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
|
|
break;
|
|
case NL80211_CHAN_HT40PLUS:
|
|
ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
|
|
break;
|
|
case NL80211_CHAN_HT20:
|
|
default:
|
|
ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
|
|
break;
|
|
}
|
|
if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
|
|
ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
|
|
|
|
/*
|
|
* Note: According to 802.11n-2009 9.13.3.1, HT Protection field and
|
|
* RIFS Mode are reserved in IBSS mode, therefore keep them at 0
|
|
*/
|
|
ht_oper->operation_mode = 0x0000;
|
|
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);
|
|
}
|
|
|
|
enum nl80211_channel_type
|
|
ieee80211_ht_oper_to_channel_type(struct ieee80211_ht_operation *ht_oper)
|
|
{
|
|
enum nl80211_channel_type channel_type;
|
|
|
|
if (!ht_oper)
|
|
return NL80211_CHAN_NO_HT;
|
|
|
|
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;
|
|
}
|
|
|
|
return channel_type;
|
|
}
|
|
|
|
int ieee80211_add_srates_ie(struct ieee80211_vif *vif,
|
|
struct sk_buff *skb, bool need_basic)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_supported_band *sband;
|
|
int rate;
|
|
u8 i, rates, *pos;
|
|
u32 basic_rates = vif->bss_conf.basic_rates;
|
|
|
|
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
|
rates = sband->n_bitrates;
|
|
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 (need_basic && basic_rates & BIT(i))
|
|
basic = 0x80;
|
|
rate = sband->bitrates[i].bitrate;
|
|
*pos++ = basic | (u8) (rate / 5);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif,
|
|
struct sk_buff *skb, bool need_basic)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_supported_band *sband;
|
|
int rate;
|
|
u8 i, exrates, *pos;
|
|
u32 basic_rates = vif->bss_conf.basic_rates;
|
|
|
|
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
|
exrates = sband->n_bitrates;
|
|
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 (need_basic && basic_rates & BIT(i))
|
|
basic = 0x80;
|
|
rate = sband->bitrates[i].bitrate;
|
|
*pos++ = basic | (u8) (rate / 5);
|
|
}
|
|
}
|
|
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;
|
|
|
|
return ifmgd->ave_beacon_signal;
|
|
}
|