1165 lines
29 KiB
C
1165 lines
29 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/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/wireless.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 = tx->skb;
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struct ieee80211_hdr *hdr;
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do {
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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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} while ((skb = skb->next));
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}
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int ieee80211_frame_duration(struct ieee80211_local *local, 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 (local->hw.conf.channel->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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size_t frame_len,
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struct ieee80211_rate *rate)
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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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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(local, 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[local->hw.conf.channel->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(local, 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(local, 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(local, 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[local->hw.conf.channel->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(local, 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(local, 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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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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if (WARN_ON(queue >= hw->queues))
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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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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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if (WARN_ON(queue >= hw->queues))
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return;
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__set_bit(reason, &local->queue_stop_reasons[queue]);
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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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int queue = skb_get_queue_mapping(skb);
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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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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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int 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, ret = 0, 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,
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IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
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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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ret++;
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queue = skb_get_queue_mapping(skb);
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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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return ret;
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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);
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}
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void ieee80211_wake_queues(struct ieee80211_hw *hw)
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{
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ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
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}
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EXPORT_SYMBOL(ieee80211_wake_queues);
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void ieee80211_iterate_active_interfaces(
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struct ieee80211_hw *hw,
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void (*iterator)(void *data, u8 *mac,
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struct ieee80211_vif *vif),
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void *data)
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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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mutex_lock(&local->iflist_mtx);
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list_for_each_entry(sdata, &local->interfaces, list) {
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switch (sdata->vif.type) {
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case __NL80211_IFTYPE_AFTER_LAST:
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case NL80211_IFTYPE_UNSPECIFIED:
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case NL80211_IFTYPE_MONITOR:
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case NL80211_IFTYPE_AP_VLAN:
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continue;
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case NL80211_IFTYPE_AP:
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case NL80211_IFTYPE_STATION:
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case NL80211_IFTYPE_ADHOC:
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case NL80211_IFTYPE_WDS:
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case NL80211_IFTYPE_MESH_POINT:
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break;
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}
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if (netif_running(sdata->dev))
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iterator(data, sdata->dev->dev_addr,
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&sdata->vif);
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}
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mutex_unlock(&local->iflist_mtx);
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}
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EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
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|
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void ieee80211_iterate_active_interfaces_atomic(
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struct ieee80211_hw *hw,
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void (*iterator)(void *data, u8 *mac,
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struct ieee80211_vif *vif),
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void *data)
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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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|
|
|
rcu_read_lock();
|
|
|
|
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
|
|
switch (sdata->vif.type) {
|
|
case __NL80211_IFTYPE_AFTER_LAST:
|
|
case NL80211_IFTYPE_UNSPECIFIED:
|
|
case NL80211_IFTYPE_MONITOR:
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
continue;
|
|
case NL80211_IFTYPE_AP:
|
|
case NL80211_IFTYPE_STATION:
|
|
case NL80211_IFTYPE_ADHOC:
|
|
case NL80211_IFTYPE_WDS:
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
break;
|
|
}
|
|
if (netif_running(sdata->dev))
|
|
iterator(data, sdata->dev->dev_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);
|
|
|
|
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);
|
|
}
|
|
|
|
u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
|
|
struct ieee802_11_elems *elems,
|
|
u64 filter, u32 crc)
|
|
{
|
|
size_t left = len;
|
|
u8 *pos = start;
|
|
bool calc_crc = filter != 0;
|
|
|
|
memset(elems, 0, sizeof(*elems));
|
|
elems->ie_start = start;
|
|
elems->total_len = len;
|
|
|
|
while (left >= 2) {
|
|
u8 id, elen;
|
|
|
|
id = *pos++;
|
|
elen = *pos++;
|
|
left -= 2;
|
|
|
|
if (elen > left)
|
|
break;
|
|
|
|
if (calc_crc && id < 64 && (filter & BIT(id)))
|
|
crc = crc32_be(crc, pos - 2, elen + 2);
|
|
|
|
switch (id) {
|
|
case WLAN_EID_SSID:
|
|
elems->ssid = pos;
|
|
elems->ssid_len = elen;
|
|
break;
|
|
case WLAN_EID_SUPP_RATES:
|
|
elems->supp_rates = pos;
|
|
elems->supp_rates_len = elen;
|
|
break;
|
|
case WLAN_EID_FH_PARAMS:
|
|
elems->fh_params = pos;
|
|
elems->fh_params_len = elen;
|
|
break;
|
|
case WLAN_EID_DS_PARAMS:
|
|
elems->ds_params = pos;
|
|
elems->ds_params_len = elen;
|
|
break;
|
|
case WLAN_EID_CF_PARAMS:
|
|
elems->cf_params = pos;
|
|
elems->cf_params_len = elen;
|
|
break;
|
|
case WLAN_EID_TIM:
|
|
if (elen >= sizeof(struct ieee80211_tim_ie)) {
|
|
elems->tim = (void *)pos;
|
|
elems->tim_len = elen;
|
|
}
|
|
break;
|
|
case WLAN_EID_IBSS_PARAMS:
|
|
elems->ibss_params = pos;
|
|
elems->ibss_params_len = elen;
|
|
break;
|
|
case WLAN_EID_CHALLENGE:
|
|
elems->challenge = pos;
|
|
elems->challenge_len = elen;
|
|
break;
|
|
case WLAN_EID_VENDOR_SPECIFIC:
|
|
if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
|
|
pos[2] == 0xf2) {
|
|
/* Microsoft OUI (00:50:F2) */
|
|
|
|
if (calc_crc)
|
|
crc = crc32_be(crc, pos - 2, elen + 2);
|
|
|
|
if (pos[3] == 1) {
|
|
/* OUI Type 1 - WPA IE */
|
|
elems->wpa = pos;
|
|
elems->wpa_len = elen;
|
|
} else if (elen >= 5 && pos[3] == 2) {
|
|
/* OUI Type 2 - WMM IE */
|
|
if (pos[4] == 0) {
|
|
elems->wmm_info = pos;
|
|
elems->wmm_info_len = elen;
|
|
} else if (pos[4] == 1) {
|
|
elems->wmm_param = pos;
|
|
elems->wmm_param_len = elen;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case WLAN_EID_RSN:
|
|
elems->rsn = pos;
|
|
elems->rsn_len = elen;
|
|
break;
|
|
case WLAN_EID_ERP_INFO:
|
|
elems->erp_info = pos;
|
|
elems->erp_info_len = elen;
|
|
break;
|
|
case WLAN_EID_EXT_SUPP_RATES:
|
|
elems->ext_supp_rates = pos;
|
|
elems->ext_supp_rates_len = elen;
|
|
break;
|
|
case WLAN_EID_HT_CAPABILITY:
|
|
if (elen >= sizeof(struct ieee80211_ht_cap))
|
|
elems->ht_cap_elem = (void *)pos;
|
|
break;
|
|
case WLAN_EID_HT_INFORMATION:
|
|
if (elen >= sizeof(struct ieee80211_ht_info))
|
|
elems->ht_info_elem = (void *)pos;
|
|
break;
|
|
case WLAN_EID_MESH_ID:
|
|
elems->mesh_id = pos;
|
|
elems->mesh_id_len = elen;
|
|
break;
|
|
case WLAN_EID_MESH_CONFIG:
|
|
elems->mesh_config = pos;
|
|
elems->mesh_config_len = elen;
|
|
break;
|
|
case WLAN_EID_PEER_LINK:
|
|
elems->peer_link = pos;
|
|
elems->peer_link_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_CHANNEL_SWITCH:
|
|
elems->ch_switch_elem = pos;
|
|
elems->ch_switch_elem_len = elen;
|
|
break;
|
|
case WLAN_EID_QUIET:
|
|
if (!elems->quiet_elem) {
|
|
elems->quiet_elem = pos;
|
|
elems->quiet_elem_len = elen;
|
|
}
|
|
elems->num_of_quiet_elem++;
|
|
break;
|
|
case WLAN_EID_COUNTRY:
|
|
elems->country_elem = pos;
|
|
elems->country_elem_len = elen;
|
|
break;
|
|
case WLAN_EID_PWR_CONSTRAINT:
|
|
elems->pwr_constr_elem = pos;
|
|
elems->pwr_constr_elem_len = elen;
|
|
break;
|
|
case WLAN_EID_TIMEOUT_INTERVAL:
|
|
elems->timeout_int = pos;
|
|
elems->timeout_int_len = elen;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
left -= elen;
|
|
pos += elen;
|
|
}
|
|
|
|
return crc;
|
|
}
|
|
|
|
void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_tx_queue_params qparam;
|
|
int queue;
|
|
bool use_11b;
|
|
int aCWmin, aCWmax;
|
|
|
|
if (!local->ops->conf_tx)
|
|
return;
|
|
|
|
memset(&qparam, 0, sizeof(qparam));
|
|
|
|
use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
|
|
!(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
|
|
|
|
for (queue = 0; queue < local_to_hw(local)->queues; queue++) {
|
|
/* Set defaults according to 802.11-2007 Table 7-37 */
|
|
aCWmax = 1023;
|
|
if (use_11b)
|
|
aCWmin = 31;
|
|
else
|
|
aCWmin = 15;
|
|
|
|
switch (queue) {
|
|
case 3: /* 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 2: /* AC_BE */
|
|
qparam.cw_max = aCWmax;
|
|
qparam.cw_min = aCWmin;
|
|
qparam.txop = 0;
|
|
qparam.aifs = 3;
|
|
break;
|
|
case 1: /* 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 0: /* 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;
|
|
}
|
|
|
|
drv_conf_tx(local, queue, &qparam);
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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 (!sband) {
|
|
WARN_ON(1);
|
|
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
|
}
|
|
|
|
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 *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) {
|
|
printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
|
|
"frame\n", sdata->dev->name);
|
|
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, bssid, ETH_ALEN);
|
|
memcpy(mgmt->sa, sdata->dev->dev_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_tx_skb(sdata, skb, 0);
|
|
}
|
|
|
|
int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
|
|
const u8 *ie, size_t ie_len)
|
|
{
|
|
struct ieee80211_supported_band *sband;
|
|
u8 *pos, *supp_rates_len, *esupp_rates_len = NULL;
|
|
int i;
|
|
|
|
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
|
|
|
pos = buffer;
|
|
|
|
*pos++ = WLAN_EID_SUPP_RATES;
|
|
supp_rates_len = pos;
|
|
*pos++ = 0;
|
|
|
|
for (i = 0; i < sband->n_bitrates; i++) {
|
|
struct ieee80211_rate *rate = &sband->bitrates[i];
|
|
|
|
if (esupp_rates_len) {
|
|
*esupp_rates_len += 1;
|
|
} else if (*supp_rates_len == 8) {
|
|
*pos++ = WLAN_EID_EXT_SUPP_RATES;
|
|
esupp_rates_len = pos;
|
|
*pos++ = 1;
|
|
} else
|
|
*supp_rates_len += 1;
|
|
|
|
*pos++ = rate->bitrate / 5;
|
|
}
|
|
|
|
if (sband->ht_cap.ht_supported) {
|
|
__le16 tmp = cpu_to_le16(sband->ht_cap.cap);
|
|
|
|
*pos++ = WLAN_EID_HT_CAPABILITY;
|
|
*pos++ = sizeof(struct ieee80211_ht_cap);
|
|
memset(pos, 0, sizeof(struct ieee80211_ht_cap));
|
|
memcpy(pos, &tmp, sizeof(u16));
|
|
pos += sizeof(u16);
|
|
/* TODO: needs a define here for << 2 */
|
|
*pos++ = sband->ht_cap.ampdu_factor |
|
|
(sband->ht_cap.ampdu_density << 2);
|
|
memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
|
|
pos += sizeof(sband->ht_cap.mcs);
|
|
pos += 2 + 4 + 1; /* ext info, BF cap, antsel */
|
|
}
|
|
|
|
/*
|
|
* If adding more here, adjust code in main.c
|
|
* that calculates local->scan_ies_len.
|
|
*/
|
|
|
|
if (ie) {
|
|
memcpy(pos, ie, ie_len);
|
|
pos += ie_len;
|
|
}
|
|
|
|
return pos - buffer;
|
|
}
|
|
|
|
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)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sk_buff *skb;
|
|
struct ieee80211_mgmt *mgmt;
|
|
u8 *pos;
|
|
|
|
skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200 +
|
|
ie_len);
|
|
if (!skb) {
|
|
printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
|
|
"request\n", sdata->dev->name);
|
|
return;
|
|
}
|
|
skb_reserve(skb, local->hw.extra_tx_headroom);
|
|
|
|
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
|
|
memset(mgmt, 0, 24);
|
|
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
|
|
IEEE80211_STYPE_PROBE_REQ);
|
|
memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
|
|
if (dst) {
|
|
memcpy(mgmt->da, dst, ETH_ALEN);
|
|
memcpy(mgmt->bssid, dst, ETH_ALEN);
|
|
} else {
|
|
memset(mgmt->da, 0xff, ETH_ALEN);
|
|
memset(mgmt->bssid, 0xff, ETH_ALEN);
|
|
}
|
|
pos = skb_put(skb, 2 + ssid_len);
|
|
*pos++ = WLAN_EID_SSID;
|
|
*pos++ = ssid_len;
|
|
memcpy(pos, ssid, ssid_len);
|
|
pos += ssid_len;
|
|
|
|
skb_put(skb, ieee80211_build_preq_ies(local, pos, ie, ie_len));
|
|
|
|
ieee80211_tx_skb(sdata, skb, 0);
|
|
}
|
|
|
|
u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
|
|
struct ieee802_11_elems *elems,
|
|
enum ieee80211_band band)
|
|
{
|
|
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 (!sband) {
|
|
WARN_ON(1);
|
|
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
|
}
|
|
|
|
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;
|
|
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);
|
|
for (j = 0; j < num_rates; j++)
|
|
if (bitrates[j].bitrate == own_rate)
|
|
supp_rates |= BIT(j);
|
|
}
|
|
return supp_rates;
|
|
}
|
|
|
|
void ieee80211_stop_device(struct ieee80211_local *local)
|
|
{
|
|
ieee80211_led_radio(local, false);
|
|
|
|
cancel_work_sync(&local->reconfig_filter);
|
|
drv_stop(local);
|
|
|
|
flush_workqueue(local->workqueue);
|
|
}
|
|
|
|
int ieee80211_reconfig(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_hw *hw = &local->hw;
|
|
struct ieee80211_sub_if_data *sdata;
|
|
struct ieee80211_if_init_conf conf;
|
|
struct sta_info *sta;
|
|
unsigned long flags;
|
|
int res;
|
|
|
|
if (local->suspended)
|
|
local->resuming = true;
|
|
|
|
/* restart hardware */
|
|
if (local->open_count) {
|
|
res = drv_start(local);
|
|
|
|
ieee80211_led_radio(local, true);
|
|
}
|
|
|
|
/* add interfaces */
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
|
|
sdata->vif.type != NL80211_IFTYPE_MONITOR &&
|
|
netif_running(sdata->dev)) {
|
|
conf.vif = &sdata->vif;
|
|
conf.type = sdata->vif.type;
|
|
conf.mac_addr = sdata->dev->dev_addr;
|
|
res = drv_add_interface(local, &conf);
|
|
}
|
|
}
|
|
|
|
/* add STAs back */
|
|
if (local->ops->sta_notify) {
|
|
spin_lock_irqsave(&local->sta_lock, flags);
|
|
list_for_each_entry(sta, &local->sta_list, list) {
|
|
sdata = sta->sdata;
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
|
|
sdata = container_of(sdata->bss,
|
|
struct ieee80211_sub_if_data,
|
|
u.ap);
|
|
|
|
drv_sta_notify(local, &sdata->vif, STA_NOTIFY_ADD,
|
|
&sta->sta);
|
|
}
|
|
spin_unlock_irqrestore(&local->sta_lock, flags);
|
|
}
|
|
|
|
/* Clear Suspend state so that ADDBA requests can be processed */
|
|
|
|
rcu_read_lock();
|
|
|
|
if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
|
|
list_for_each_entry_rcu(sta, &local->sta_list, list) {
|
|
clear_sta_flags(sta, WLAN_STA_SUSPEND);
|
|
}
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
|
|
/* setup RTS threshold */
|
|
drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
|
|
|
|
/* 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 = ~0;
|
|
if (!netif_running(sdata->dev))
|
|
continue;
|
|
switch (sdata->vif.type) {
|
|
case NL80211_IFTYPE_STATION:
|
|
/* disable beacon change bits */
|
|
changed &= ~(BSS_CHANGED_BEACON |
|
|
BSS_CHANGED_BEACON_ENABLED);
|
|
/* fall through */
|
|
case NL80211_IFTYPE_ADHOC:
|
|
case NL80211_IFTYPE_AP:
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
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 __NL80211_IFTYPE_AFTER_LAST:
|
|
WARN_ON(1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* add back keys */
|
|
list_for_each_entry(sdata, &local->interfaces, list)
|
|
if (netif_running(sdata->dev))
|
|
ieee80211_enable_keys(sdata);
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
add_timer(&local->sta_cleanup);
|
|
|
|
spin_lock_irqsave(&local->sta_lock, flags);
|
|
list_for_each_entry(sta, &local->sta_list, list)
|
|
mesh_plink_restart(sta);
|
|
spin_unlock_irqrestore(&local->sta_lock, flags);
|
|
#else
|
|
WARN_ON(1);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|