| /* |
| * Copyright 2002-2005, Instant802 Networks, Inc. |
| * Copyright 2005-2006, Devicescape Software, Inc. |
| * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
| * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * utilities for mac80211 |
| */ |
| |
| #include <net/mac80211.h> |
| #include <linux/netdevice.h> |
| #include <linux/export.h> |
| #include <linux/types.h> |
| #include <linux/slab.h> |
| #include <linux/skbuff.h> |
| #include <linux/etherdevice.h> |
| #include <linux/if_arp.h> |
| #include <linux/bitmap.h> |
| #include <linux/crc32.h> |
| #include <net/net_namespace.h> |
| #include <net/cfg80211.h> |
| #include <net/rtnetlink.h> |
| |
| #include "ieee80211_i.h" |
| #include "driver-ops.h" |
| #include "rate.h" |
| #include "mesh.h" |
| #include "wme.h" |
| #include "led.h" |
| #include "wep.h" |
| |
| /* privid for wiphys to determine whether they belong to us or not */ |
| void *mac80211_wiphy_privid = &mac80211_wiphy_privid; |
| |
| struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) |
| { |
| struct ieee80211_local *local; |
| BUG_ON(!wiphy); |
| |
| local = wiphy_priv(wiphy); |
| return &local->hw; |
| } |
| EXPORT_SYMBOL(wiphy_to_ieee80211_hw); |
| |
| u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, |
| enum nl80211_iftype type) |
| { |
| __le16 fc = hdr->frame_control; |
| |
| /* drop ACK/CTS frames and incorrect hdr len (ctrl) */ |
| if (len < 16) |
| return NULL; |
| |
| if (ieee80211_is_data(fc)) { |
| if (len < 24) /* drop incorrect hdr len (data) */ |
| return NULL; |
| |
| if (ieee80211_has_a4(fc)) |
| return NULL; |
| if (ieee80211_has_tods(fc)) |
| return hdr->addr1; |
| if (ieee80211_has_fromds(fc)) |
| return hdr->addr2; |
| |
| return hdr->addr3; |
| } |
| |
| if (ieee80211_is_mgmt(fc)) { |
| if (len < 24) /* drop incorrect hdr len (mgmt) */ |
| return NULL; |
| return hdr->addr3; |
| } |
| |
| if (ieee80211_is_ctl(fc)) { |
| if(ieee80211_is_pspoll(fc)) |
| return hdr->addr1; |
| |
| if (ieee80211_is_back_req(fc)) { |
| switch (type) { |
| case NL80211_IFTYPE_STATION: |
| return hdr->addr2; |
| case NL80211_IFTYPE_AP: |
| case NL80211_IFTYPE_AP_VLAN: |
| return hdr->addr1; |
| default: |
| break; /* fall through to the return */ |
| } |
| } |
| } |
| |
| return NULL; |
| } |
| |
| void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) |
| { |
| struct sk_buff *skb; |
| struct ieee80211_hdr *hdr; |
| |
| skb_queue_walk(&tx->skbs, skb) { |
| hdr = (struct ieee80211_hdr *) skb->data; |
| hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); |
| } |
| } |
| |
| int ieee80211_frame_duration(enum ieee80211_band band, size_t len, |
| int rate, int erp, int short_preamble, |
| int shift) |
| { |
| int dur; |
| |
| /* calculate duration (in microseconds, rounded up to next higher |
| * integer if it includes a fractional microsecond) to send frame of |
| * len bytes (does not include FCS) at the given rate. Duration will |
| * also include SIFS. |
| * |
| * rate is in 100 kbps, so divident is multiplied by 10 in the |
| * DIV_ROUND_UP() operations. |
| * |
| * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and |
| * is assumed to be 0 otherwise. |
| */ |
| |
| if (band == IEEE80211_BAND_5GHZ || erp) { |
| /* |
| * OFDM: |
| * |
| * N_DBPS = DATARATE x 4 |
| * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) |
| * (16 = SIGNAL time, 6 = tail bits) |
| * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext |
| * |
| * T_SYM = 4 usec |
| * 802.11a - 18.5.2: aSIFSTime = 16 usec |
| * 802.11g - 19.8.4: aSIFSTime = 10 usec + |
| * signal ext = 6 usec |
| */ |
| dur = 16; /* SIFS + signal ext */ |
| dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */ |
| dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */ |
| |
| /* IEEE 802.11-2012 18.3.2.4: all values above are: |
| * * times 4 for 5 MHz |
| * * times 2 for 10 MHz |
| */ |
| dur *= 1 << shift; |
| |
| /* rates should already consider the channel bandwidth, |
| * don't apply divisor again. |
| */ |
| dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, |
| 4 * rate); /* T_SYM x N_SYM */ |
| } else { |
| /* |
| * 802.11b or 802.11g with 802.11b compatibility: |
| * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + |
| * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. |
| * |
| * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 |
| * aSIFSTime = 10 usec |
| * aPreambleLength = 144 usec or 72 usec with short preamble |
| * aPLCPHeaderLength = 48 usec or 24 usec with short preamble |
| */ |
| dur = 10; /* aSIFSTime = 10 usec */ |
| dur += short_preamble ? (72 + 24) : (144 + 48); |
| |
| dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); |
| } |
| |
| return dur; |
| } |
| |
| /* Exported duration function for driver use */ |
| __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| enum ieee80211_band band, |
| size_t frame_len, |
| struct ieee80211_rate *rate) |
| { |
| struct ieee80211_sub_if_data *sdata; |
| u16 dur; |
| int erp, shift = 0; |
| bool short_preamble = false; |
| |
| erp = 0; |
| if (vif) { |
| sdata = vif_to_sdata(vif); |
| short_preamble = sdata->vif.bss_conf.use_short_preamble; |
| if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
| erp = rate->flags & IEEE80211_RATE_ERP_G; |
| shift = ieee80211_vif_get_shift(vif); |
| } |
| |
| dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp, |
| short_preamble, shift); |
| |
| return cpu_to_le16(dur); |
| } |
| EXPORT_SYMBOL(ieee80211_generic_frame_duration); |
| |
| __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, size_t frame_len, |
| const struct ieee80211_tx_info *frame_txctl) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct ieee80211_rate *rate; |
| struct ieee80211_sub_if_data *sdata; |
| bool short_preamble; |
| int erp, shift = 0, bitrate; |
| u16 dur; |
| struct ieee80211_supported_band *sband; |
| |
| sband = local->hw.wiphy->bands[frame_txctl->band]; |
| |
| short_preamble = false; |
| |
| rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
| |
| erp = 0; |
| if (vif) { |
| sdata = vif_to_sdata(vif); |
| short_preamble = sdata->vif.bss_conf.use_short_preamble; |
| if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
| erp = rate->flags & IEEE80211_RATE_ERP_G; |
| shift = ieee80211_vif_get_shift(vif); |
| } |
| |
| bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); |
| |
| /* CTS duration */ |
| dur = ieee80211_frame_duration(sband->band, 10, bitrate, |
| erp, short_preamble, shift); |
| /* Data frame duration */ |
| dur += ieee80211_frame_duration(sband->band, frame_len, bitrate, |
| erp, short_preamble, shift); |
| /* ACK duration */ |
| dur += ieee80211_frame_duration(sband->band, 10, bitrate, |
| erp, short_preamble, shift); |
| |
| return cpu_to_le16(dur); |
| } |
| EXPORT_SYMBOL(ieee80211_rts_duration); |
| |
| __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| size_t frame_len, |
| const struct ieee80211_tx_info *frame_txctl) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct ieee80211_rate *rate; |
| struct ieee80211_sub_if_data *sdata; |
| bool short_preamble; |
| int erp, shift = 0, bitrate; |
| u16 dur; |
| struct ieee80211_supported_band *sband; |
| |
| sband = local->hw.wiphy->bands[frame_txctl->band]; |
| |
| short_preamble = false; |
| |
| rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
| erp = 0; |
| if (vif) { |
| sdata = vif_to_sdata(vif); |
| short_preamble = sdata->vif.bss_conf.use_short_preamble; |
| if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
| erp = rate->flags & IEEE80211_RATE_ERP_G; |
| shift = ieee80211_vif_get_shift(vif); |
| } |
| |
| bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); |
| |
| /* Data frame duration */ |
| dur = ieee80211_frame_duration(sband->band, frame_len, bitrate, |
| erp, short_preamble, shift); |
| if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { |
| /* ACK duration */ |
| dur += ieee80211_frame_duration(sband->band, 10, bitrate, |
| erp, short_preamble, shift); |
| } |
| |
| return cpu_to_le16(dur); |
| } |
| EXPORT_SYMBOL(ieee80211_ctstoself_duration); |
| |
| void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue) |
| { |
| struct ieee80211_sub_if_data *sdata; |
| int n_acs = IEEE80211_NUM_ACS; |
| |
| if (local->hw.queues < IEEE80211_NUM_ACS) |
| n_acs = 1; |
| |
| list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| int ac; |
| |
| if (!sdata->dev) |
| continue; |
| |
| if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) |
| continue; |
| |
| if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE && |
| local->queue_stop_reasons[sdata->vif.cab_queue] != 0) |
| continue; |
| |
| for (ac = 0; ac < n_acs; ac++) { |
| int ac_queue = sdata->vif.hw_queue[ac]; |
| |
| if (ac_queue == queue || |
| (sdata->vif.cab_queue == queue && |
| local->queue_stop_reasons[ac_queue] == 0 && |
| skb_queue_empty(&local->pending[ac_queue]))) |
| netif_wake_subqueue(sdata->dev, ac); |
| } |
| } |
| } |
| |
| static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, |
| enum queue_stop_reason reason) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| |
| trace_wake_queue(local, queue, reason); |
| |
| if (WARN_ON(queue >= hw->queues)) |
| return; |
| |
| if (!test_bit(reason, &local->queue_stop_reasons[queue])) |
| return; |
| |
| __clear_bit(reason, &local->queue_stop_reasons[queue]); |
| |
| if (local->queue_stop_reasons[queue] != 0) |
| /* someone still has this queue stopped */ |
| return; |
| |
| if (skb_queue_empty(&local->pending[queue])) { |
| rcu_read_lock(); |
| ieee80211_propagate_queue_wake(local, queue); |
| rcu_read_unlock(); |
| } else |
| tasklet_schedule(&local->tx_pending_tasklet); |
| } |
| |
| void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, |
| enum queue_stop_reason reason) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| __ieee80211_wake_queue(hw, queue, reason); |
| spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| } |
| |
| void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) |
| { |
| ieee80211_wake_queue_by_reason(hw, queue, |
| IEEE80211_QUEUE_STOP_REASON_DRIVER); |
| } |
| EXPORT_SYMBOL(ieee80211_wake_queue); |
| |
| static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, |
| enum queue_stop_reason reason) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct ieee80211_sub_if_data *sdata; |
| int n_acs = IEEE80211_NUM_ACS; |
| |
| trace_stop_queue(local, queue, reason); |
| |
| if (WARN_ON(queue >= hw->queues)) |
| return; |
| |
| if (test_bit(reason, &local->queue_stop_reasons[queue])) |
| return; |
| |
| __set_bit(reason, &local->queue_stop_reasons[queue]); |
| |
| if (local->hw.queues < IEEE80211_NUM_ACS) |
| n_acs = 1; |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| int ac; |
| |
| if (!sdata->dev) |
| continue; |
| |
| for (ac = 0; ac < n_acs; ac++) { |
| if (sdata->vif.hw_queue[ac] == queue || |
| sdata->vif.cab_queue == queue) |
| netif_stop_subqueue(sdata->dev, ac); |
| } |
| } |
| rcu_read_unlock(); |
| } |
| |
| void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, |
| enum queue_stop_reason reason) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| __ieee80211_stop_queue(hw, queue, reason); |
| spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| } |
| |
| void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) |
| { |
| ieee80211_stop_queue_by_reason(hw, queue, |
| IEEE80211_QUEUE_STOP_REASON_DRIVER); |
| } |
| EXPORT_SYMBOL(ieee80211_stop_queue); |
| |
| void ieee80211_add_pending_skb(struct ieee80211_local *local, |
| struct sk_buff *skb) |
| { |
| struct ieee80211_hw *hw = &local->hw; |
| unsigned long flags; |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| int queue = info->hw_queue; |
| |
| if (WARN_ON(!info->control.vif)) { |
| ieee80211_free_txskb(&local->hw, skb); |
| return; |
| } |
| |
| spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); |
| __skb_queue_tail(&local->pending[queue], skb); |
| __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); |
| spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| } |
| |
| void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local, |
| struct sk_buff_head *skbs, |
| void (*fn)(void *data), void *data) |
| { |
| struct ieee80211_hw *hw = &local->hw; |
| struct sk_buff *skb; |
| unsigned long flags; |
| int queue, i; |
| |
| spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| while ((skb = skb_dequeue(skbs))) { |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| |
| if (WARN_ON(!info->control.vif)) { |
| ieee80211_free_txskb(&local->hw, skb); |
| continue; |
| } |
| |
| queue = info->hw_queue; |
| |
| __ieee80211_stop_queue(hw, queue, |
| IEEE80211_QUEUE_STOP_REASON_SKB_ADD); |
| |
| __skb_queue_tail(&local->pending[queue], skb); |
| } |
| |
| if (fn) |
| fn(data); |
| |
| for (i = 0; i < hw->queues; i++) |
| __ieee80211_wake_queue(hw, i, |
| IEEE80211_QUEUE_STOP_REASON_SKB_ADD); |
| spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| } |
| |
| void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, |
| unsigned long queues, |
| enum queue_stop_reason reason) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| unsigned long flags; |
| int i; |
| |
| spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| |
| for_each_set_bit(i, &queues, hw->queues) |
| __ieee80211_stop_queue(hw, i, reason); |
| |
| spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| } |
| |
| void ieee80211_stop_queues(struct ieee80211_hw *hw) |
| { |
| ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, |
| IEEE80211_QUEUE_STOP_REASON_DRIVER); |
| } |
| EXPORT_SYMBOL(ieee80211_stop_queues); |
| |
| int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| unsigned long flags; |
| int ret; |
| |
| if (WARN_ON(queue >= hw->queues)) |
| return true; |
| |
| spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, |
| &local->queue_stop_reasons[queue]); |
| spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| return ret; |
| } |
| EXPORT_SYMBOL(ieee80211_queue_stopped); |
| |
| void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, |
| unsigned long queues, |
| enum queue_stop_reason reason) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| unsigned long flags; |
| int i; |
| |
| spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| |
| for_each_set_bit(i, &queues, hw->queues) |
| __ieee80211_wake_queue(hw, i, reason); |
| |
| spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| } |
| |
| void ieee80211_wake_queues(struct ieee80211_hw *hw) |
| { |
| ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, |
| IEEE80211_QUEUE_STOP_REASON_DRIVER); |
| } |
| EXPORT_SYMBOL(ieee80211_wake_queues); |
| |
| void ieee80211_flush_queues(struct ieee80211_local *local, |
| struct ieee80211_sub_if_data *sdata) |
| { |
| u32 queues; |
| |
| if (!local->ops->flush) |
| return; |
| |
| if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) { |
| int ac; |
| |
| queues = 0; |
| |
| for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) |
| queues |= BIT(sdata->vif.hw_queue[ac]); |
| if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) |
| queues |= BIT(sdata->vif.cab_queue); |
| } else { |
| /* all queues */ |
| queues = BIT(local->hw.queues) - 1; |
| } |
| |
| ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP, |
| IEEE80211_QUEUE_STOP_REASON_FLUSH); |
| |
| drv_flush(local, queues, false); |
| |
| ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP, |
| IEEE80211_QUEUE_STOP_REASON_FLUSH); |
| } |
| |
| void ieee80211_iterate_active_interfaces( |
| struct ieee80211_hw *hw, u32 iter_flags, |
| void (*iterator)(void *data, u8 *mac, |
| struct ieee80211_vif *vif), |
| void *data) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| 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: |
| if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE)) |
| continue; |
| break; |
| case NL80211_IFTYPE_AP_VLAN: |
| continue; |
| default: |
| break; |
| } |
| if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && |
| !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) |
| continue; |
| if (ieee80211_sdata_running(sdata)) |
| iterator(data, sdata->vif.addr, |
| &sdata->vif); |
| } |
| |
| sdata = rcu_dereference_protected(local->monitor_sdata, |
| lockdep_is_held(&local->iflist_mtx)); |
| if (sdata && |
| (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || |
| sdata->flags & IEEE80211_SDATA_IN_DRIVER)) |
| 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, u32 iter_flags, |
| 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: |
| if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE)) |
| continue; |
| break; |
| case NL80211_IFTYPE_AP_VLAN: |
| continue; |
| default: |
| break; |
| } |
| if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && |
| !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) |
| continue; |
| if (ieee80211_sdata_running(sdata)) |
| iterator(data, sdata->vif.addr, |
| &sdata->vif); |
| } |
| |
| sdata = rcu_dereference(local->monitor_sdata); |
| if (sdata && |
| (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || |
| sdata->flags & IEEE80211_SDATA_IN_DRIVER)) |
| 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(const u8 *start, size_t len, bool action, |
| struct ieee802_11_elems *elems, |
| u64 filter, u32 crc) |
| { |
| size_t left = len; |
| const u8 *pos = start; |
| bool calc_crc = filter != 0; |
| DECLARE_BITMAP(seen_elems, 256); |
| const u8 *ie; |
| |
| bitmap_zero(seen_elems, 256); |
| memset(elems, 0, sizeof(*elems)); |
| elems->ie_start = start; |
| elems->total_len = len; |
| |
| while (left >= 2) { |
| u8 id, elen; |
| bool elem_parse_failed; |
| |
| id = *pos++; |
| elen = *pos++; |
| left -= 2; |
| |
| if (elen > left) { |
| elems->parse_error = true; |
| break; |
| } |
| |
| switch (id) { |
| case WLAN_EID_SSID: |
| case WLAN_EID_SUPP_RATES: |
| case WLAN_EID_FH_PARAMS: |
| case WLAN_EID_DS_PARAMS: |
| case WLAN_EID_CF_PARAMS: |
| case WLAN_EID_TIM: |
| case WLAN_EID_IBSS_PARAMS: |
| case WLAN_EID_CHALLENGE: |
| case WLAN_EID_RSN: |
| case WLAN_EID_ERP_INFO: |
| case WLAN_EID_EXT_SUPP_RATES: |
| case WLAN_EID_HT_CAPABILITY: |
| case WLAN_EID_HT_OPERATION: |
| case WLAN_EID_VHT_CAPABILITY: |
| case WLAN_EID_VHT_OPERATION: |
| case WLAN_EID_MESH_ID: |
| case WLAN_EID_MESH_CONFIG: |
| case WLAN_EID_PEER_MGMT: |
| case WLAN_EID_PREQ: |
| case WLAN_EID_PREP: |
| case WLAN_EID_PERR: |
| case WLAN_EID_RANN: |
| case WLAN_EID_CHANNEL_SWITCH: |
| case WLAN_EID_EXT_CHANSWITCH_ANN: |
| case WLAN_EID_COUNTRY: |
| case WLAN_EID_PWR_CONSTRAINT: |
| case WLAN_EID_TIMEOUT_INTERVAL: |
| case WLAN_EID_SECONDARY_CHANNEL_OFFSET: |
| case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: |
| /* |
| * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible |
| * that if the content gets bigger it might be needed more than once |
| */ |
| if (test_bit(id, seen_elems)) { |
| elems->parse_error = true; |
| left -= elen; |
| pos += elen; |
| continue; |
| } |
| break; |
| } |
| |
| if (calc_crc && id < 64 && (filter & (1ULL << id))) |
| crc = crc32_be(crc, pos - 2, elen + 2); |
| |
| elem_parse_failed = false; |
| |
| switch (id) { |
| case WLAN_EID_SSID: |
| elems->ssid = pos; |
| elems->ssid_len = elen; |
| break; |
| case WLAN_EID_SUPP_RATES: |
| elems->supp_rates = pos; |
| elems->supp_rates_len = elen; |
| break; |
| case WLAN_EID_DS_PARAMS: |
| if (elen >= 1) |
| elems->ds_params = pos; |
| else |
| elem_parse_failed = true; |
| break; |
| case WLAN_EID_TIM: |
| if (elen >= sizeof(struct ieee80211_tim_ie)) { |
| elems->tim = (void *)pos; |
| elems->tim_len = elen; |
| } else |
| elem_parse_failed = true; |
| break; |
| case WLAN_EID_CHALLENGE: |
| elems->challenge = pos; |
| elems->challenge_len = elen; |
| break; |
| case WLAN_EID_VENDOR_SPECIFIC: |
| if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && |
| pos[2] == 0xf2) { |
| /* Microsoft OUI (00:50:F2) */ |
| |
| if (calc_crc) |
| crc = crc32_be(crc, pos - 2, elen + 2); |
| |
| if (elen >= 5 && pos[3] == 2) { |
| /* OUI Type 2 - WMM IE */ |
| if (pos[4] == 0) { |
| elems->wmm_info = pos; |
| elems->wmm_info_len = elen; |
| } else if (pos[4] == 1) { |
| elems->wmm_param = pos; |
| elems->wmm_param_len = elen; |
| } |
| } |
| } |
| break; |
| case WLAN_EID_RSN: |
| elems->rsn = pos; |
| elems->rsn_len = elen; |
| break; |
| case WLAN_EID_ERP_INFO: |
| if (elen >= 1) |
| elems->erp_info = pos; |
| else |
| elem_parse_failed = true; |
| break; |
| case WLAN_EID_EXT_SUPP_RATES: |
| elems->ext_supp_rates = pos; |
| elems->ext_supp_rates_len = elen; |
| break; |
| case WLAN_EID_HT_CAPABILITY: |
| if (elen >= sizeof(struct ieee80211_ht_cap)) |
| elems->ht_cap_elem = (void *)pos; |
| else |
| elem_parse_failed = true; |
| break; |
| case WLAN_EID_HT_OPERATION: |
| if (elen >= sizeof(struct ieee80211_ht_operation)) |
| elems->ht_operation = (void *)pos; |
| else |
| elem_parse_failed = true; |
| break; |
| case WLAN_EID_VHT_CAPABILITY: |
| if (elen >= sizeof(struct ieee80211_vht_cap)) |
| elems->vht_cap_elem = (void *)pos; |
| else |
| elem_parse_failed = true; |
| break; |
| case WLAN_EID_VHT_OPERATION: |
| if (elen >= sizeof(struct ieee80211_vht_operation)) |
| elems->vht_operation = (void *)pos; |
| else |
| elem_parse_failed = true; |
| break; |
| case WLAN_EID_OPMODE_NOTIF: |
| if (elen > 0) |
| elems->opmode_notif = pos; |
| else |
| elem_parse_failed = true; |
| break; |
| case WLAN_EID_MESH_ID: |
| elems->mesh_id = pos; |
| elems->mesh_id_len = elen; |
| break; |
| case WLAN_EID_MESH_CONFIG: |
| if (elen >= sizeof(struct ieee80211_meshconf_ie)) |
| elems->mesh_config = (void *)pos; |
| else |
| elem_parse_failed = true; |
| break; |
| case WLAN_EID_PEER_MGMT: |
| elems->peering = pos; |
| elems->peering_len = elen; |
| break; |
| case WLAN_EID_MESH_AWAKE_WINDOW: |
| if (elen >= 2) |
| elems->awake_window = (void *)pos; |
| break; |
| case WLAN_EID_PREQ: |
| elems->preq = pos; |
| elems->preq_len = elen; |
| break; |
| case WLAN_EID_PREP: |
| elems->prep = pos; |
| elems->prep_len = elen; |
| break; |
| case WLAN_EID_PERR: |
| elems->perr = pos; |
| elems->perr_len = elen; |
| break; |
| case WLAN_EID_RANN: |
| if (elen >= sizeof(struct ieee80211_rann_ie)) |
| elems->rann = (void *)pos; |
| else |
| elem_parse_failed = true; |
| break; |
| case WLAN_EID_CHANNEL_SWITCH: |
| if (elen != sizeof(struct ieee80211_channel_sw_ie)) { |
| elem_parse_failed = true; |
| break; |
| } |
| elems->ch_switch_ie = (void *)pos; |
| break; |
| case WLAN_EID_EXT_CHANSWITCH_ANN: |
| if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { |
| elem_parse_failed = true; |
| break; |
| } |
| elems->ext_chansw_ie = (void *)pos; |
| break; |
| case WLAN_EID_SECONDARY_CHANNEL_OFFSET: |
| if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { |
| elem_parse_failed = true; |
| break; |
| } |
| elems->sec_chan_offs = (void *)pos; |
| break; |
| case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: |
| if (!action || |
| elen != sizeof(*elems->wide_bw_chansw_ie)) { |
| elem_parse_failed = true; |
| break; |
| } |
| elems->wide_bw_chansw_ie = (void *)pos; |
| break; |
| case WLAN_EID_CHANNEL_SWITCH_WRAPPER: |
| if (action) { |
| elem_parse_failed = true; |
| break; |
| } |
| /* |
| * This is a bit tricky, but as we only care about |
| * the wide bandwidth channel switch element, so |
| * just parse it out manually. |
| */ |
| ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, |
| pos, elen); |
| if (ie) { |
| if (ie[1] == sizeof(*elems->wide_bw_chansw_ie)) |
| elems->wide_bw_chansw_ie = |
| (void *)(ie + 2); |
| else |
| elem_parse_failed = true; |
| } |
| break; |
| case WLAN_EID_COUNTRY: |
| elems->country_elem = pos; |
| elems->country_elem_len = elen; |
| break; |
| case WLAN_EID_PWR_CONSTRAINT: |
| if (elen != 1) { |
| elem_parse_failed = true; |
| break; |
| } |
| elems->pwr_constr_elem = pos; |
| break; |
| case WLAN_EID_TIMEOUT_INTERVAL: |
| if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) |
| elems->timeout_int = (void *)pos; |
| else |
| elem_parse_failed = true; |
| break; |
| default: |
| break; |
| } |
| |
| if (elem_parse_failed) |
| elems->parse_error = true; |
| else |
| __set_bit(id, seen_elems); |
| |
| left -= elen; |
| pos += elen; |
| } |
| |
| if (left != 0) |
| elems->parse_error = true; |
| |
| return crc; |
| } |
| |
| void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, |
| bool bss_notify) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_tx_queue_params qparam; |
| struct ieee80211_chanctx_conf *chanctx_conf; |
| int ac; |
| bool use_11b, enable_qos; |
| int aCWmin, aCWmax; |
| |
| if (!local->ops->conf_tx) |
| return; |
| |
| if (local->hw.queues < IEEE80211_NUM_ACS) |
| return; |
| |
| memset(&qparam, 0, sizeof(qparam)); |
| |
| rcu_read_lock(); |
| chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| use_11b = (chanctx_conf && |
| chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) && |
| !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); |
| rcu_read_unlock(); |
| |
| /* |
| * By default disable QoS in STA mode for old access points, which do |
| * not support 802.11e. New APs will provide proper queue parameters, |
| * that we will configure later. |
| */ |
| enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION); |
| |
| 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; |
| |
| if (enable_qos) { |
| switch (ac) { |
| case IEEE80211_AC_BK: |
| qparam.cw_max = aCWmax; |
| qparam.cw_min = aCWmin; |
| qparam.txop = 0; |
| qparam.aifs = 7; |
| break; |
| /* never happens but let's not leave undefined */ |
| default: |
| case IEEE80211_AC_BE: |
| qparam.cw_max = aCWmax; |
| qparam.cw_min = aCWmin; |
| qparam.txop = 0; |
| qparam.aifs = 3; |
| break; |
| case IEEE80211_AC_VI: |
| qparam.cw_max = aCWmin; |
| qparam.cw_min = (aCWmin + 1) / 2 - 1; |
| if (use_11b) |
| qparam.txop = 6016/32; |
| else |
| qparam.txop = 3008/32; |
| qparam.aifs = 2; |
| break; |
| case IEEE80211_AC_VO: |
| qparam.cw_max = (aCWmin + 1) / 2 - 1; |
| qparam.cw_min = (aCWmin + 1) / 4 - 1; |
| if (use_11b) |
| qparam.txop = 3264/32; |
| else |
| qparam.txop = 1504/32; |
| qparam.aifs = 2; |
| break; |
| } |
| } else { |
| /* Confiure old 802.11b/g medium access rules. */ |
| qparam.cw_max = aCWmax; |
| qparam.cw_min = aCWmin; |
| qparam.txop = 0; |
| qparam.aifs = 2; |
| } |
| |
| qparam.uapsd = false; |
| |
| sdata->tx_conf[ac] = qparam; |
| drv_conf_tx(local, sdata, ac, &qparam); |
| } |
| |
| if (sdata->vif.type != NL80211_IFTYPE_MONITOR && |
| sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) { |
| sdata->vif.bss_conf.qos = enable_qos; |
| if (bss_notify) |
| ieee80211_bss_info_change_notify(sdata, |
| BSS_CHANGED_QOS); |
| } |
| } |
| |
| void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
| const size_t supp_rates_len, |
| const u8 *supp_rates) |
| { |
| struct ieee80211_chanctx_conf *chanctx_conf; |
| 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; |
| |
| rcu_read_lock(); |
| chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| |
| if (chanctx_conf && |
| chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ && |
| have_higher_than_11mbit) |
| sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
| else |
| sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; |
| rcu_read_unlock(); |
| |
| ieee80211_set_wmm_default(sdata, true); |
| } |
| |
| void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, |
| u16 transaction, u16 auth_alg, u16 status, |
| const u8 *extra, size_t extra_len, const u8 *da, |
| const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, |
| u32 tx_flags) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| int err; |
| |
| 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(status); |
| if (extra) |
| memcpy(skb_put(skb, extra_len), extra, extra_len); |
| |
| if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { |
| mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); |
| err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); |
| WARN_ON(err); |
| } |
| |
| IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | |
| tx_flags; |
| ieee80211_tx_skb(sdata, skb); |
| } |
| |
| void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
| const u8 *bssid, u16 stype, u16 reason, |
| bool send_frame, u8 *frame_buf) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt = (void *)frame_buf; |
| |
| /* build frame */ |
| mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
| mgmt->duration = 0; /* initialize only */ |
| mgmt->seq_ctrl = 0; /* initialize only */ |
| memcpy(mgmt->da, bssid, ETH_ALEN); |
| memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
| memcpy(mgmt->bssid, bssid, ETH_ALEN); |
| /* u.deauth.reason_code == u.disassoc.reason_code */ |
| mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
| |
| if (send_frame) { |
| skb = dev_alloc_skb(local->hw.extra_tx_headroom + |
| IEEE80211_DEAUTH_FRAME_LEN); |
| if (!skb) |
| return; |
| |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| |
| /* copy in frame */ |
| memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN), |
| mgmt, IEEE80211_DEAUTH_FRAME_LEN); |
| |
| if (sdata->vif.type != NL80211_IFTYPE_STATION || |
| !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) |
| IEEE80211_SKB_CB(skb)->flags |= |
| IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| |
| ieee80211_tx_skb(sdata, skb); |
| } |
| } |
| |
| int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, |
| size_t buffer_len, const u8 *ie, size_t ie_len, |
| enum ieee80211_band band, u32 rate_mask, |
| struct cfg80211_chan_def *chandef) |
| { |
| struct ieee80211_supported_band *sband; |
| u8 *pos = buffer, *end = buffer + buffer_len; |
| size_t offset = 0, noffset; |
| int supp_rates_len, i; |
| u8 rates[32]; |
| int num_rates; |
| int ext_rates_len; |
| int shift; |
| u32 rate_flags; |
| |
| sband = local->hw.wiphy->bands[band]; |
| if (WARN_ON_ONCE(!sband)) |
| return 0; |
| |
| rate_flags = ieee80211_chandef_rate_flags(chandef); |
| shift = ieee80211_chandef_get_shift(chandef); |
| |
| num_rates = 0; |
| for (i = 0; i < sband->n_bitrates; i++) { |
| if ((BIT(i) & rate_mask) == 0) |
| continue; /* skip rate */ |
| if ((rate_flags & sband->bitrates[i].flags) != rate_flags) |
| continue; |
| |
| rates[num_rates++] = |
| (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, |
| (1 << shift) * 5); |
| } |
| |
| supp_rates_len = min_t(int, num_rates, 8); |
| |
| if (end - pos < 2 + supp_rates_len) |
| goto out_err; |
| *pos++ = WLAN_EID_SUPP_RATES; |
| *pos++ = supp_rates_len; |
| memcpy(pos, rates, supp_rates_len); |
| pos += supp_rates_len; |
| |
| /* insert "request information" if in custom IEs */ |
| if (ie && ie_len) { |
| static const u8 before_extrates[] = { |
| WLAN_EID_SSID, |
| WLAN_EID_SUPP_RATES, |
| WLAN_EID_REQUEST, |
| }; |
| noffset = ieee80211_ie_split(ie, ie_len, |
| before_extrates, |
| ARRAY_SIZE(before_extrates), |
| offset); |
| if (end - pos < noffset - offset) |
| goto out_err; |
| memcpy(pos, ie + offset, noffset - offset); |
| pos += noffset - offset; |
| offset = noffset; |
| } |
| |
| ext_rates_len = num_rates - supp_rates_len; |
| if (ext_rates_len > 0) { |
| if (end - pos < 2 + ext_rates_len) |
| goto out_err; |
| *pos++ = WLAN_EID_EXT_SUPP_RATES; |
| *pos++ = ext_rates_len; |
| memcpy(pos, rates + supp_rates_len, ext_rates_len); |
| pos += ext_rates_len; |
| } |
| |
| if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) { |
| if (end - pos < 3) |
| goto out_err; |
| *pos++ = WLAN_EID_DS_PARAMS; |
| *pos++ = 1; |
| *pos++ = ieee80211_frequency_to_channel( |
| chandef->chan->center_freq); |
| } |
| |
| /* insert custom IEs that go before HT */ |
| if (ie && ie_len) { |
| static const u8 before_ht[] = { |
| WLAN_EID_SSID, |
| WLAN_EID_SUPP_RATES, |
| WLAN_EID_REQUEST, |
| WLAN_EID_EXT_SUPP_RATES, |
| WLAN_EID_DS_PARAMS, |
| WLAN_EID_SUPPORTED_REGULATORY_CLASSES, |
| }; |
| noffset = ieee80211_ie_split(ie, ie_len, |
| before_ht, ARRAY_SIZE(before_ht), |
| offset); |
| if (end - pos < noffset - offset) |
| goto out_err; |
| memcpy(pos, ie + offset, noffset - offset); |
| pos += noffset - offset; |
| offset = noffset; |
| } |
| |
| if (sband->ht_cap.ht_supported) { |
| if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) |
| goto out_err; |
| pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, |
| sband->ht_cap.cap); |
| } |
| |
| /* |
| * If adding more here, adjust code in main.c |
| * that calculates local->scan_ies_len. |
| */ |
| |
| /* add any remaining custom IEs */ |
| if (ie && ie_len) { |
| noffset = ie_len; |
| if (end - pos < noffset - offset) |
| goto out_err; |
| memcpy(pos, ie + offset, noffset - offset); |
| pos += noffset - offset; |
| } |
| |
| if (sband->vht_cap.vht_supported) { |
| if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) |
| goto out_err; |
| pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, |
| sband->vht_cap.cap); |
| } |
| |
| return pos - buffer; |
| out_err: |
| WARN_ONCE(1, "not enough space for preq IEs\n"); |
| return pos - buffer; |
| } |
| |
| struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, |
| u8 *dst, u32 ratemask, |
| struct ieee80211_channel *chan, |
| const u8 *ssid, size_t ssid_len, |
| const u8 *ie, size_t ie_len, |
| bool directed) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct cfg80211_chan_def chandef; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| int ies_len; |
| |
| /* |
| * Do not send DS Channel parameter for directed probe requests |
| * in order to maximize the chance that we get a response. Some |
| * badly-behaved APs don't respond when this parameter is included. |
| */ |
| chandef.width = sdata->vif.bss_conf.chandef.width; |
| if (directed) |
| chandef.chan = NULL; |
| else |
| chandef.chan = chan; |
| |
| skb = ieee80211_probereq_get(&local->hw, &sdata->vif, |
| ssid, ssid_len, 100 + ie_len); |
| if (!skb) |
| return NULL; |
| |
| ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb), |
| skb_tailroom(skb), |
| ie, ie_len, chan->band, |
| ratemask, &chandef); |
| skb_put(skb, ies_len); |
| |
| if (dst) { |
| mgmt = (struct ieee80211_mgmt *) skb->data; |
| memcpy(mgmt->da, dst, ETH_ALEN); |
| memcpy(mgmt->bssid, dst, ETH_ALEN); |
| } |
| |
| IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| |
| return skb; |
| } |
| |
| void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
| const u8 *ssid, size_t ssid_len, |
| const u8 *ie, size_t ie_len, |
| u32 ratemask, bool directed, u32 tx_flags, |
| struct ieee80211_channel *channel, bool scan) |
| { |
| struct sk_buff *skb; |
| |
| skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel, |
| ssid, ssid_len, |
| ie, ie_len, directed); |
| if (skb) { |
| IEEE80211_SKB_CB(skb)->flags |= tx_flags; |
| if (scan) |
| ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band); |
| else |
| ieee80211_tx_skb(sdata, skb); |
| } |
| } |
| |
| u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, |
| struct ieee802_11_elems *elems, |
| enum ieee80211_band band, u32 *basic_rates) |
| { |
| struct ieee80211_supported_band *sband; |
| struct ieee80211_rate *bitrates; |
| size_t num_rates; |
| u32 supp_rates, rate_flags; |
| int i, j, shift; |
| sband = sdata->local->hw.wiphy->bands[band]; |
| |
| rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); |
| shift = ieee80211_vif_get_shift(&sdata->vif); |
| |
| if (WARN_ON(!sband)) |
| return 1; |
| |
| 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++) { |
| int brate; |
| if ((rate_flags & sband->bitrates[j].flags) |
| != rate_flags) |
| continue; |
| |
| brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, |
| 1 << shift); |
| |
| if (brate == own_rate) { |
| supp_rates |= BIT(j); |
| if (basic_rates && is_basic) |
| *basic_rates |= BIT(j); |
| } |
| } |
| } |
| return supp_rates; |
| } |
| |
| void ieee80211_stop_device(struct ieee80211_local *local) |
| { |
| ieee80211_led_radio(local, false); |
| ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); |
| |
| cancel_work_sync(&local->reconfig_filter); |
| |
| flush_workqueue(local->workqueue); |
| drv_stop(local); |
| } |
| |
| static void ieee80211_assign_chanctx(struct ieee80211_local *local, |
| struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_chanctx_conf *conf; |
| struct ieee80211_chanctx *ctx; |
| |
| if (!local->use_chanctx) |
| return; |
| |
| mutex_lock(&local->chanctx_mtx); |
| conf = rcu_dereference_protected(sdata->vif.chanctx_conf, |
| lockdep_is_held(&local->chanctx_mtx)); |
| if (conf) { |
| ctx = container_of(conf, struct ieee80211_chanctx, conf); |
| drv_assign_vif_chanctx(local, sdata, ctx); |
| } |
| mutex_unlock(&local->chanctx_mtx); |
| } |
| |
| int ieee80211_reconfig(struct ieee80211_local *local) |
| { |
| struct ieee80211_hw *hw = &local->hw; |
| struct ieee80211_sub_if_data *sdata; |
| struct ieee80211_chanctx *ctx; |
| struct sta_info *sta; |
| int res, i; |
| bool reconfig_due_to_wowlan = false; |
| |
| #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. |
| */ |
| reconfig_due_to_wowlan = true; |
| } |
| #endif |
| /* everything else happens only if HW was up & running */ |
| if (!local->open_count) |
| goto wake_up; |
| |
| /* |
| * Upon resume hardware can sometimes be goofy due to |
| * various platform / driver / bus issues, so restarting |
| * the device may at times not work immediately. Propagate |
| * the error. |
| */ |
| res = drv_start(local); |
| if (res) { |
| WARN(local->suspended, "Hardware became unavailable " |
| "upon resume. This could be a software issue " |
| "prior to suspend or a hardware issue.\n"); |
| return res; |
| } |
| |
| /* setup fragmentation threshold */ |
| drv_set_frag_threshold(local, hw->wiphy->frag_threshold); |
| |
| /* setup RTS threshold */ |
| drv_set_rts_threshold(local, hw->wiphy->rts_threshold); |
| |
| /* reset coverage class */ |
| drv_set_coverage_class(local, hw->wiphy->coverage_class); |
| |
| ieee80211_led_radio(local, true); |
| ieee80211_mod_tpt_led_trig(local, |
| IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); |
| |
| /* add interfaces */ |
| sdata = rtnl_dereference(local->monitor_sdata); |
| if (sdata) { |
| /* in HW restart it exists already */ |
| WARN_ON(local->resuming); |
| res = drv_add_interface(local, sdata); |
| if (WARN_ON(res)) { |
| rcu_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 channel contexts */ |
| if (local->use_chanctx) { |
| mutex_lock(&local->chanctx_mtx); |
| list_for_each_entry(ctx, &local->chanctx_list, list) |
| WARN_ON(drv_add_chanctx(local, ctx)); |
| mutex_unlock(&local->chanctx_mtx); |
| } |
| |
| list_for_each_entry(sdata, &local->interfaces, list) { |
| if (!ieee80211_sdata_running(sdata)) |
| continue; |
| ieee80211_assign_chanctx(local, sdata); |
| } |
| |
| sdata = rtnl_dereference(local->monitor_sdata); |
| if (sdata && ieee80211_sdata_running(sdata)) |
| ieee80211_assign_chanctx(local, sdata); |
| |
| /* add STAs back */ |
| mutex_lock(&local->sta_mtx); |
| list_for_each_entry(sta, &local->sta_list, list) { |
| enum ieee80211_sta_state state; |
| |
| if (!sta->uploaded) |
| continue; |
| |
| /* AP-mode stations will be added later */ |
| if (sta->sdata->vif.type == NL80211_IFTYPE_AP) |
| continue; |
| |
| for (state = IEEE80211_STA_NOTEXIST; |
| state < sta->sta_state; state++) |
| WARN_ON(drv_sta_state(local, sta->sdata, sta, state, |
| state + 1)); |
| } |
| mutex_unlock(&local->sta_mtx); |
| |
| /* reconfigure tx conf */ |
| if (hw->queues >= IEEE80211_NUM_ACS) { |
| list_for_each_entry(sdata, &local->interfaces, list) { |
| if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
| sdata->vif.type == NL80211_IFTYPE_MONITOR || |
| !ieee80211_sdata_running(sdata)) |
| continue; |
| |
| for (i = 0; i < IEEE80211_NUM_ACS; i++) |
| drv_conf_tx(local, sdata, i, |
| &sdata->tx_conf[i]); |
| } |
| } |
| |
| /* reconfigure hardware */ |
| ieee80211_hw_config(local, ~0); |
| |
| ieee80211_configure_filter(local); |
| |
| /* Finally also reconfigure all the BSS information */ |
| list_for_each_entry(sdata, &local->interfaces, list) { |
| u32 changed; |
| |
| if (!ieee80211_sdata_running(sdata)) |
| continue; |
| |
| /* common change flags for all interface types */ |
| changed = BSS_CHANGED_ERP_CTS_PROT | |
| BSS_CHANGED_ERP_PREAMBLE | |
| BSS_CHANGED_ERP_SLOT | |
| BSS_CHANGED_HT | |
| BSS_CHANGED_BASIC_RATES | |
| BSS_CHANGED_BEACON_INT | |
| BSS_CHANGED_BSSID | |
| BSS_CHANGED_CQM | |
| BSS_CHANGED_QOS | |
| BSS_CHANGED_IDLE | |
| BSS_CHANGED_TXPOWER; |
| |
| switch (sdata->vif.type) { |
| case NL80211_IFTYPE_STATION: |
| changed |= BSS_CHANGED_ASSOC | |
| BSS_CHANGED_ARP_FILTER | |
| BSS_CHANGED_PS; |
| |
| /* Re-send beacon info report to the driver */ |
| if (sdata->u.mgd.have_beacon) |
| changed |= BSS_CHANGED_BEACON_INFO; |
| |
| sdata_lock(sdata); |
| ieee80211_bss_info_change_notify(sdata, changed); |
| sdata_unlock(sdata); |
| break; |
| case NL80211_IFTYPE_ADHOC: |
| changed |= BSS_CHANGED_IBSS; |
| /* fall through */ |
| case NL80211_IFTYPE_AP: |
| changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; |
| |
| if (sdata->vif.type == NL80211_IFTYPE_AP) { |
| changed |= BSS_CHANGED_AP_PROBE_RESP; |
| |
| if (rcu_access_pointer(sdata->u.ap.beacon)) |
| drv_start_ap(local, sdata); |
| } |
| |
| /* fall through */ |
| case NL80211_IFTYPE_MESH_POINT: |
| if (sdata->vif.bss_conf.enable_beacon) { |
| changed |= BSS_CHANGED_BEACON | |
| BSS_CHANGED_BEACON_ENABLED; |
| ieee80211_bss_info_change_notify(sdata, changed); |
| } |
| break; |
| case NL80211_IFTYPE_WDS: |
| break; |
| case NL80211_IFTYPE_AP_VLAN: |
| case NL80211_IFTYPE_MONITOR: |
| /* ignore virtual */ |
| break; |
| case NL80211_IFTYPE_P2P_DEVICE: |
| changed = BSS_CHANGED_IDLE; |
| break; |
| case NL80211_IFTYPE_UNSPECIFIED: |
| case NUM_NL80211_IFTYPES: |
| case NL80211_IFTYPE_P2P_CLIENT: |
| case NL80211_IFTYPE_P2P_GO: |
| WARN_ON(1); |
| break; |
| } |
| } |
| |
| ieee80211_recalc_ps(local, -1); |
| |
| /* |
| * The sta might be in psm against the ap (e.g. because |
| * this was the state before a hw restart), so we |
| * explicitly send a null packet in order to make sure |
| * it'll sync against the ap (and get out of psm). |
| */ |
| if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { |
| list_for_each_entry(sdata, &local->interfaces, list) { |
| if (sdata->vif.type != NL80211_IFTYPE_STATION) |
| continue; |
| if (!sdata->u.mgd.associated) |
| continue; |
| |
| ieee80211_send_nullfunc(local, sdata, 0); |
| } |
| } |
| |
| /* APs are now beaconing, add back stations */ |
| mutex_lock(&local->sta_mtx); |
| list_for_each_entry(sta, &local->sta_list, list) { |
| enum ieee80211_sta_state state; |
| |
| if (!sta->uploaded) |
| continue; |
| |
| if (sta->sdata->vif.type != NL80211_IFTYPE_AP) |
| continue; |
| |
| for (state = IEEE80211_STA_NOTEXIST; |
| state < sta->sta_state; state++) |
| WARN_ON(drv_sta_state(local, sta->sdata, sta, state, |
| state + 1)); |
| } |
| mutex_unlock(&local->sta_mtx); |
| |
| /* add back keys */ |
| list_for_each_entry(sdata, &local->interfaces, list) |
| if (ieee80211_sdata_running(sdata)) |
| ieee80211_enable_keys(sdata); |
| |
| wake_up: |
| local->in_reconfig = false; |
| barrier(); |
| |
| if (local->monitors == local->open_count && local->monitors > 0) |
| ieee80211_add_virtual_monitor(local); |
| |
| /* |
| * Clear the WLAN_STA_BLOCK_BA flag so new aggregation |
| * sessions can be established after a resume. |
| * |
| * Also tear down aggregation sessions since reconfiguring |
| * them in a hardware restart scenario is not easily done |
| * right now, and the hardware will have lost information |
| * about the sessions, but we and the AP still think they |
| * are active. This is really a workaround though. |
| */ |
| if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { |
| mutex_lock(&local->sta_mtx); |
| |
| list_for_each_entry(sta, &local->sta_list, list) { |
| ieee80211_sta_tear_down_BA_sessions( |
| sta, AGG_STOP_LOCAL_REQUEST); |
| clear_sta_flag(sta, WLAN_STA_BLOCK_BA); |
| } |
| |
| mutex_unlock(&local->sta_mtx); |
| } |
| |
| ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, |
| IEEE80211_QUEUE_STOP_REASON_SUSPEND); |
| |
| /* |
| * If this is for hw restart things are still running. |
| * We may want to change that later, however. |
| */ |
| if (!local->suspended || reconfig_due_to_wowlan) |
| drv_restart_complete(local); |
| |
| if (!local->suspended) |
| return 0; |
| |
| #ifdef CONFIG_PM |
| /* first set suspended false, then resuming */ |
| local->suspended = false; |
| mb(); |
| local->resuming = false; |
| |
| list_for_each_entry(sdata, &local->interfaces, list) { |
| if (!ieee80211_sdata_running(sdata)) |
| continue; |
| if (sdata->vif.type == NL80211_IFTYPE_STATION) |
| ieee80211_sta_restart(sdata); |
| } |
| |
| mod_timer(&local->sta_cleanup, jiffies + 1); |
| #else |
| WARN_ON(1); |
| #endif |
| return 0; |
| } |
| |
| void ieee80211_resume_disconnect(struct ieee80211_vif *vif) |
| { |
| struct ieee80211_sub_if_data *sdata; |
| struct ieee80211_local *local; |
| struct ieee80211_key *key; |
| |
| if (WARN_ON(!vif)) |
| return; |
| |
| sdata = vif_to_sdata(vif); |
| local = sdata->local; |
| |
| if (WARN_ON(!local->resuming)) |
| return; |
| |
| if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) |
| return; |
| |
| sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; |
| |
| mutex_lock(&local->key_mtx); |
| list_for_each_entry(key, &sdata->key_list, list) |
| key->flags |= KEY_FLAG_TAINTED; |
| mutex_unlock(&local->key_mtx); |
| } |
| EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); |
| |
| void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_chanctx_conf *chanctx_conf; |
| struct ieee80211_chanctx *chanctx; |
| |
| mutex_lock(&local->chanctx_mtx); |
| |
| chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, |
| lockdep_is_held(&local->chanctx_mtx)); |
| |
| if (WARN_ON_ONCE(!chanctx_conf)) |
| goto unlock; |
| |
| chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); |
| ieee80211_recalc_smps_chanctx(local, chanctx); |
| unlock: |
| mutex_unlock(&local->chanctx_mtx); |
| } |
| |
| static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id) |
| { |
| int i; |
| |
| for (i = 0; i < n_ids; i++) |
| if (ids[i] == id) |
| return true; |
| return false; |
| } |
| |
| /** |
| * ieee80211_ie_split - split an IE buffer according to ordering |
| * |
| * @ies: the IE buffer |
| * @ielen: the length of the IE buffer |
| * @ids: an array with element IDs that are allowed before |
| * the split |
| * @n_ids: the size of the element ID array |
| * @offset: offset where to start splitting in the buffer |
| * |
| * This function splits an IE buffer by updating the @offset |
| * variable to point to the location where the buffer should be |
| * split. |
| * |
| * It assumes that the given IE buffer is well-formed, this |
| * has to be guaranteed by the caller! |
| * |
| * It also assumes that the IEs in the buffer are ordered |
| * correctly, if not the result of using this function will not |
| * be ordered correctly either, i.e. it does no reordering. |
| * |
| * The function returns the offset where the next part of the |
| * buffer starts, which may be @ielen if the entire (remainder) |
| * of the buffer should be used. |
| */ |
| size_t ieee80211_ie_split(const u8 *ies, size_t ielen, |
| const u8 *ids, int n_ids, size_t offset) |
| { |
| size_t pos = offset; |
| |
| while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) |
| pos += 2 + ies[pos + 1]; |
| |
| return pos; |
| } |
| |
| size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) |
| { |
| size_t pos = offset; |
| |
| while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) |
| pos += 2 + ies[pos + 1]; |
| |
| return pos; |
| } |
| |
| static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, |
| int rssi_min_thold, |
| int rssi_max_thold) |
| { |
| trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); |
| |
| if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
| return; |
| |
| /* |
| * Scale up threshold values before storing it, as the RSSI averaging |
| * algorithm uses a scaled up value as well. Change this scaling |
| * factor if the RSSI averaging algorithm changes. |
| */ |
| sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; |
| sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; |
| } |
| |
| void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, |
| int rssi_min_thold, |
| int rssi_max_thold) |
| { |
| struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| |
| WARN_ON(rssi_min_thold == rssi_max_thold || |
| rssi_min_thold > rssi_max_thold); |
| |
| _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, |
| rssi_max_thold); |
| } |
| EXPORT_SYMBOL(ieee80211_enable_rssi_reports); |
| |
| void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) |
| { |
| struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| |
| _ieee80211_enable_rssi_reports(sdata, 0, 0); |
| } |
| EXPORT_SYMBOL(ieee80211_disable_rssi_reports); |
| |
| u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, |
| u16 cap) |
| { |
| __le16 tmp; |
| |
| *pos++ = WLAN_EID_HT_CAPABILITY; |
| *pos++ = sizeof(struct ieee80211_ht_cap); |
| memset(pos, 0, sizeof(struct ieee80211_ht_cap)); |
| |
| /* capability flags */ |
| tmp = cpu_to_le16(cap); |
| memcpy(pos, &tmp, sizeof(u16)); |
| pos += sizeof(u16); |
| |
| /* AMPDU parameters */ |
| *pos++ = ht_cap->ampdu_factor | |
| (ht_cap->ampdu_density << |
| IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); |
| |
| /* MCS set */ |
| memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); |
| pos += sizeof(ht_cap->mcs); |
| |
| /* extended capabilities */ |
| pos += sizeof(__le16); |
| |
| /* BF capabilities */ |
| pos += sizeof(__le32); |
| |
| /* antenna selection */ |
| pos += sizeof(u8); |
| |
| return pos; |
| } |
| |
| u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, |
| u32 cap) |
| { |
| __le32 tmp; |
| |
| *pos++ = WLAN_EID_VHT_CAPABILITY; |
| *pos++ = sizeof(struct ieee80211_vht_cap); |
| memset(pos, 0, sizeof(struct ieee80211_vht_cap)); |
| |
| /* capability flags */ |
| tmp = cpu_to_le32(cap); |
| memcpy(pos, &tmp, sizeof(u32)); |
| pos += sizeof(u32); |
| |
| /* VHT MCS set */ |
| memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); |
| pos += sizeof(vht_cap->vht_mcs); |
| |
| return pos; |
| } |
| |
| u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, |
| const struct cfg80211_chan_def *chandef, |
| u16 prot_mode) |
| { |
| struct ieee80211_ht_operation *ht_oper; |
| /* Build HT Information */ |
| *pos++ = WLAN_EID_HT_OPERATION; |
| *pos++ = sizeof(struct ieee80211_ht_operation); |
| ht_oper = (struct ieee80211_ht_operation *)pos; |
| ht_oper->primary_chan = ieee80211_frequency_to_channel( |
| chandef->chan->center_freq); |
| switch (chandef->width) { |
| case NL80211_CHAN_WIDTH_160: |
| case NL80211_CHAN_WIDTH_80P80: |
| case NL80211_CHAN_WIDTH_80: |
| case NL80211_CHAN_WIDTH_40: |
| if (chandef->center_freq1 > chandef->chan->center_freq) |
| ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; |
| else |
| ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; |
| break; |
| default: |
| ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; |
| break; |
| } |
| if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && |
| chandef->width != NL80211_CHAN_WIDTH_20_NOHT && |
| chandef->width != NL80211_CHAN_WIDTH_20) |
| ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; |
| |
| ht_oper->operation_mode = cpu_to_le16(prot_mode); |
| ht_oper->stbc_param = 0x0000; |
| |
| /* It seems that Basic MCS set and Supported MCS set |
| are identical for the first 10 bytes */ |
| memset(&ht_oper->basic_set, 0, 16); |
| memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); |
| |
| return pos + sizeof(struct ieee80211_ht_operation); |
| } |
| |
| void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan, |
| const struct ieee80211_ht_operation *ht_oper, |
| struct cfg80211_chan_def *chandef) |
| { |
| enum nl80211_channel_type channel_type; |
| |
| if (!ht_oper) { |
| cfg80211_chandef_create(chandef, control_chan, |
| NL80211_CHAN_NO_HT); |
| return; |
| } |
| |
| switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
| case IEEE80211_HT_PARAM_CHA_SEC_NONE: |
| channel_type = NL80211_CHAN_HT20; |
| break; |
| case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: |
| channel_type = NL80211_CHAN_HT40PLUS; |
| break; |
| case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
| channel_type = NL80211_CHAN_HT40MINUS; |
| break; |
| default: |
| channel_type = NL80211_CHAN_NO_HT; |
| } |
| |
| cfg80211_chandef_create(chandef, control_chan, channel_type); |
| } |
| |
| int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef, |
| const struct ieee80211_supported_band *sband, |
| const u8 *srates, int srates_len, u32 *rates) |
| { |
| u32 rate_flags = ieee80211_chandef_rate_flags(chandef); |
| int shift = ieee80211_chandef_get_shift(chandef); |
| struct ieee80211_rate *br; |
| int brate, rate, i, j, count = 0; |
| |
| *rates = 0; |
| |
| for (i = 0; i < srates_len; i++) { |
| rate = srates[i] & 0x7f; |
| |
| for (j = 0; j < sband->n_bitrates; j++) { |
| br = &sband->bitrates[j]; |
| if ((rate_flags & br->flags) != rate_flags) |
| continue; |
| |
| brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); |
| if (brate == rate) { |
| *rates |= BIT(j); |
| count++; |
| break; |
| } |
| } |
| } |
| return count; |
| } |
| |
| int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, |
| struct sk_buff *skb, bool need_basic, |
| enum ieee80211_band band) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_supported_band *sband; |
| int rate, shift; |
| u8 i, rates, *pos; |
| u32 basic_rates = sdata->vif.bss_conf.basic_rates; |
| u32 rate_flags; |
| |
| shift = ieee80211_vif_get_shift(&sdata->vif); |
| rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); |
| sband = local->hw.wiphy->bands[band]; |
| rates = 0; |
| for (i = 0; i < sband->n_bitrates; i++) { |
| if ((rate_flags & sband->bitrates[i].flags) != rate_flags) |
| continue; |
| rates++; |
| } |
| if (rates > 8) |
| rates = 8; |
| |
| if (skb_tailroom(skb) < rates + 2) |
| return -ENOMEM; |
| |
| pos = skb_put(skb, rates + 2); |
| *pos++ = WLAN_EID_SUPP_RATES; |
| *pos++ = rates; |
| for (i = 0; i < rates; i++) { |
| u8 basic = 0; |
| if ((rate_flags & sband->bitrates[i].flags) != rate_flags) |
| continue; |
| |
| if (need_basic && basic_rates & BIT(i)) |
| basic = 0x80; |
| rate = sband->bitrates[i].bitrate; |
| rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, |
| 5 * (1 << shift)); |
| *pos++ = basic | (u8) rate; |
| } |
| |
| return 0; |
| } |
| |
| int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, |
| struct sk_buff *skb, bool need_basic, |
| enum ieee80211_band band) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_supported_band *sband; |
| int rate, skip, shift; |
| u8 i, exrates, *pos; |
| u32 basic_rates = sdata->vif.bss_conf.basic_rates; |
| u32 rate_flags; |
| |
| rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); |
| shift = ieee80211_vif_get_shift(&sdata->vif); |
| |
| sband = local->hw.wiphy->bands[band]; |
| exrates = 0; |
| for (i = 0; i < sband->n_bitrates; i++) { |
| if ((rate_flags & sband->bitrates[i].flags) != rate_flags) |
| continue; |
| exrates++; |
| } |
| |
| if (exrates > 8) |
| exrates -= 8; |
| else |
| exrates = 0; |
| |
| if (skb_tailroom(skb) < exrates + 2) |
| return -ENOMEM; |
| |
| if (exrates) { |
| pos = skb_put(skb, exrates + 2); |
| *pos++ = WLAN_EID_EXT_SUPP_RATES; |
| *pos++ = exrates; |
| skip = 0; |
| for (i = 8; i < sband->n_bitrates; i++) { |
| u8 basic = 0; |
| if ((rate_flags & sband->bitrates[i].flags) |
| != rate_flags) |
| continue; |
| if (skip++ < 8) |
| continue; |
| if (need_basic && basic_rates & BIT(i)) |
| basic = 0x80; |
| rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, |
| 5 * (1 << shift)); |
| *pos++ = basic | (u8) rate; |
| } |
| } |
| return 0; |
| } |
| |
| int ieee80211_ave_rssi(struct ieee80211_vif *vif) |
| { |
| struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| |
| if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) { |
| /* non-managed type inferfaces */ |
| return 0; |
| } |
| return ifmgd->ave_beacon_signal / 16; |
| } |
| EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); |
| |
| u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) |
| { |
| if (!mcs) |
| return 1; |
| |
| /* TODO: consider rx_highest */ |
| |
| if (mcs->rx_mask[3]) |
| return 4; |
| if (mcs->rx_mask[2]) |
| return 3; |
| if (mcs->rx_mask[1]) |
| return 2; |
| return 1; |
| } |
| |
| /** |
| * ieee80211_calculate_rx_timestamp - calculate timestamp in frame |
| * @local: mac80211 hw info struct |
| * @status: RX status |
| * @mpdu_len: total MPDU length (including FCS) |
| * @mpdu_offset: offset into MPDU to calculate timestamp at |
| * |
| * This function calculates the RX timestamp at the given MPDU offset, taking |
| * into account what the RX timestamp was. An offset of 0 will just normalize |
| * the timestamp to TSF at beginning of MPDU reception. |
| */ |
| u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, |
| struct ieee80211_rx_status *status, |
| unsigned int mpdu_len, |
| unsigned int mpdu_offset) |
| { |
| u64 ts = status->mactime; |
| struct rate_info ri; |
| u16 rate; |
| |
| if (WARN_ON(!ieee80211_have_rx_timestamp(status))) |
| return 0; |
| |
| memset(&ri, 0, sizeof(ri)); |
| |
| /* Fill cfg80211 rate info */ |
| if (status->flag & RX_FLAG_HT) { |
| ri.mcs = status->rate_idx; |
| ri.flags |= RATE_INFO_FLAGS_MCS; |
| if (status->flag & RX_FLAG_40MHZ) |
| ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH; |
| if (status->flag & RX_FLAG_SHORT_GI) |
| ri.flags |= RATE_INFO_FLAGS_SHORT_GI; |
| } else if (status->flag & RX_FLAG_VHT) { |
| ri.flags |= RATE_INFO_FLAGS_VHT_MCS; |
| ri.mcs = status->rate_idx; |
| ri.nss = status->vht_nss; |
| if (status->flag & RX_FLAG_40MHZ) |
| ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH; |
| if (status->flag & RX_FLAG_80MHZ) |
| ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH; |
| if (status->flag & RX_FLAG_80P80MHZ) |
| ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH; |
| if (status->flag & RX_FLAG_160MHZ) |
| ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH; |
| if (status->flag & RX_FLAG_SHORT_GI) |
| ri.flags |= RATE_INFO_FLAGS_SHORT_GI; |
| } else { |
| struct ieee80211_supported_band *sband; |
| int shift = 0; |
| int bitrate; |
| |
| if (status->flag & RX_FLAG_10MHZ) |
| shift = 1; |
| if (status->flag & RX_FLAG_5MHZ) |
| shift = 2; |
| |
| sband = local->hw.wiphy->bands[status->band]; |
| bitrate = sband->bitrates[status->rate_idx].bitrate; |
| ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); |
| } |
| |
| rate = cfg80211_calculate_bitrate(&ri); |
| |
| /* rewind from end of MPDU */ |
| if (status->flag & RX_FLAG_MACTIME_END) |
| ts -= mpdu_len * 8 * 10 / rate; |
| |
| ts += mpdu_offset * 8 * 10 / rate; |
| |
| return ts; |
| } |
| |
| void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) |
| { |
| struct ieee80211_sub_if_data *sdata; |
| |
| mutex_lock(&local->iflist_mtx); |
| list_for_each_entry(sdata, &local->interfaces, list) { |
| cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); |
| |
| if (sdata->wdev.cac_started) { |
| ieee80211_vif_release_channel(sdata); |
| cfg80211_cac_event(sdata->dev, |
| NL80211_RADAR_CAC_ABORTED, |
| GFP_KERNEL); |
| } |
| } |
| mutex_unlock(&local->iflist_mtx); |
| } |
| |
| void ieee80211_dfs_radar_detected_work(struct work_struct *work) |
| { |
| struct ieee80211_local *local = |
| container_of(work, struct ieee80211_local, radar_detected_work); |
| struct cfg80211_chan_def chandef; |
| |
| ieee80211_dfs_cac_cancel(local); |
| |
| if (local->use_chanctx) |
| /* currently not handled */ |
| WARN_ON(1); |
| else { |
| chandef = local->hw.conf.chandef; |
| cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); |
| } |
| } |
| |
| void ieee80211_radar_detected(struct ieee80211_hw *hw) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| |
| trace_api_radar_detected(local); |
| |
| ieee80211_queue_work(hw, &local->radar_detected_work); |
| } |
| EXPORT_SYMBOL(ieee80211_radar_detected); |