| /* |
| * 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(struct ieee80211_local *local, size_t len, |
| int rate, int erp, int short_preamble) |
| { |
| 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. |
| */ |
| |
| if (local->hw.conf.channel->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 - 17.5.2: aSIFSTime = 16 usec |
| * 802.11g - 19.8.4: aSIFSTime = 10 usec + |
| * signal ext = 6 usec |
| */ |
| dur = 16; /* SIFS + signal ext */ |
| dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ |
| dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ |
| 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, |
| size_t frame_len, |
| struct ieee80211_rate *rate) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct ieee80211_sub_if_data *sdata; |
| u16 dur; |
| int erp; |
| 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; |
| } |
| |
| dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp, |
| short_preamble); |
| |
| 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; |
| u16 dur; |
| struct ieee80211_supported_band *sband; |
| |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->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; |
| } |
| |
| /* CTS duration */ |
| dur = ieee80211_frame_duration(local, 10, rate->bitrate, |
| erp, short_preamble); |
| /* Data frame duration */ |
| dur += ieee80211_frame_duration(local, frame_len, rate->bitrate, |
| erp, short_preamble); |
| /* ACK duration */ |
| dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
| erp, short_preamble); |
| |
| 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; |
| u16 dur; |
| struct ieee80211_supported_band *sband; |
| |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->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; |
| } |
| |
| /* Data frame duration */ |
| dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, |
| erp, short_preamble); |
| if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { |
| /* ACK duration */ |
| dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
| erp, short_preamble); |
| } |
| |
| return cpu_to_le16(dur); |
| } |
| EXPORT_SYMBOL(ieee80211_ctstoself_duration); |
| |
| static void __ieee80211_wake_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; |
| |
| trace_wake_queue(local, queue, reason); |
| |
| if (WARN_ON(queue >= hw->queues)) |
| 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(); |
| list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) |
| continue; |
| netif_wake_subqueue(sdata->dev, 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; |
| |
| trace_stop_queue(local, queue, reason); |
| |
| if (WARN_ON(queue >= hw->queues)) |
| return; |
| |
| __set_bit(reason, &local->queue_stop_reasons[queue]); |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(sdata, &local->interfaces, list) |
| netif_stop_subqueue(sdata->dev, queue); |
| 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; |
| int queue = skb_get_queue_mapping(skb); |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| |
| if (WARN_ON(!info->control.vif)) { |
| kfree_skb(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); |
| for (i = 0; i < hw->queues; i++) |
| __ieee80211_stop_queue(hw, i, |
| IEEE80211_QUEUE_STOP_REASON_SKB_ADD); |
| |
| while ((skb = skb_dequeue(skbs))) { |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| |
| if (WARN_ON(!info->control.vif)) { |
| kfree_skb(skb); |
| continue; |
| } |
| |
| queue = skb_get_queue_mapping(skb); |
| __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_add_pending_skbs(struct ieee80211_local *local, |
| struct sk_buff_head *skbs) |
| { |
| ieee80211_add_pending_skbs_fn(local, skbs, NULL, NULL); |
| } |
| |
| void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, |
| 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 (i = 0; i < hw->queues; i++) |
| __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_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 = !!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, |
| 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 (i = 0; i < hw->queues; i++) |
| __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_QUEUE_STOP_REASON_DRIVER); |
| } |
| EXPORT_SYMBOL(ieee80211_wake_queues); |
| |
| void ieee80211_iterate_active_interfaces( |
| struct ieee80211_hw *hw, |
| void (*iterator)(void *data, u8 *mac, |
| struct ieee80211_vif *vif), |
| void *data) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct ieee80211_sub_if_data *sdata; |
| |
| mutex_lock(&local->iflist_mtx); |
| |
| list_for_each_entry(sdata, &local->interfaces, list) { |
| switch (sdata->vif.type) { |
| case NL80211_IFTYPE_MONITOR: |
| case NL80211_IFTYPE_AP_VLAN: |
| continue; |
| default: |
| break; |
| } |
| if (ieee80211_sdata_running(sdata)) |
| iterator(data, sdata->vif.addr, |
| &sdata->vif); |
| } |
| |
| mutex_unlock(&local->iflist_mtx); |
| } |
| EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); |
| |
| void ieee80211_iterate_active_interfaces_atomic( |
| struct ieee80211_hw *hw, |
| void (*iterator)(void *data, u8 *mac, |
| struct ieee80211_vif *vif), |
| void *data) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct ieee80211_sub_if_data *sdata; |
| |
| rcu_read_lock(); |
| |
| list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| switch (sdata->vif.type) { |
| case NL80211_IFTYPE_MONITOR: |
| case NL80211_IFTYPE_AP_VLAN: |
| continue; |
| default: |
| break; |
| } |
| if (ieee80211_sdata_running(sdata)) |
| iterator(data, sdata->vif.addr, |
| &sdata->vif); |
| } |
| |
| rcu_read_unlock(); |
| } |
| EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); |
| |
| /* |
| * Nothing should have been stuffed into the workqueue during |
| * the suspend->resume cycle. If this WARN is seen then there |
| * is a bug with either the driver suspend or something in |
| * mac80211 stuffing into the workqueue which we haven't yet |
| * cleared during mac80211's suspend cycle. |
| */ |
| static bool ieee80211_can_queue_work(struct ieee80211_local *local) |
| { |
| if (WARN(local->suspended && !local->resuming, |
| "queueing ieee80211 work while going to suspend\n")) |
| return false; |
| |
| return true; |
| } |
| |
| void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| |
| if (!ieee80211_can_queue_work(local)) |
| return; |
| |
| queue_work(local->workqueue, work); |
| } |
| EXPORT_SYMBOL(ieee80211_queue_work); |
| |
| void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, |
| struct delayed_work *dwork, |
| unsigned long delay) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| |
| if (!ieee80211_can_queue_work(local)) |
| return; |
| |
| queue_delayed_work(local->workqueue, dwork, delay); |
| } |
| EXPORT_SYMBOL(ieee80211_queue_delayed_work); |
| |
| u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, |
| struct ieee802_11_elems *elems, |
| u64 filter, u32 crc) |
| { |
| size_t left = len; |
| u8 *pos = start; |
| bool calc_crc = filter != 0; |
| |
| 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 & (1ULL << 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: |
| if (elen >= sizeof(struct ieee80211_meshconf_ie)) |
| elems->mesh_config = (void *)pos; |
| break; |
| case WLAN_EID_PEER_MGMT: |
| elems->peering = pos; |
| elems->peering_len = elen; |
| break; |
| case WLAN_EID_PREQ: |
| elems->preq = pos; |
| elems->preq_len = elen; |
| break; |
| case WLAN_EID_PREP: |
| elems->prep = pos; |
| elems->prep_len = elen; |
| break; |
| case WLAN_EID_PERR: |
| elems->perr = pos; |
| elems->perr_len = elen; |
| break; |
| case WLAN_EID_RANN: |
| if (elen >= sizeof(struct ieee80211_rann_ie)) |
| elems->rann = (void *)pos; |
| 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 ieee802_11_parse_elems(u8 *start, size_t len, |
| struct ieee802_11_elems *elems) |
| { |
| ieee802_11_parse_elems_crc(start, len, elems, 0, 0); |
| } |
| |
| void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata) |
| { |
| 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; |
| } |
| |
| qparam.uapsd = false; |
| |
| sdata->tx_conf[queue] = qparam; |
| drv_conf_tx(local, sdata, queue, &qparam); |
| } |
| |
| /* after reinitialize QoS TX queues setting to default, |
| * disable QoS at all */ |
| |
| if (sdata->vif.type != NL80211_IFTYPE_MONITOR) { |
| sdata->vif.bss_conf.qos = |
| sdata->vif.type != NL80211_IFTYPE_STATION; |
| ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); |
| } |
| } |
| |
| void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
| const size_t supp_rates_len, |
| const u8 *supp_rates) |
| { |
| struct ieee80211_local *local = sdata->local; |
| int i, have_higher_than_11mbit = 0; |
| |
| /* cf. IEEE 802.11 9.2.12 */ |
| for (i = 0; i < supp_rates_len; i++) |
| if ((supp_rates[i] & 0x7f) * 5 > 110) |
| have_higher_than_11mbit = 1; |
| |
| if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && |
| have_higher_than_11mbit) |
| sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
| else |
| sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; |
| |
| ieee80211_set_wmm_default(sdata); |
| } |
| |
| 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 *da, |
| const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| int err; |
| |
| skb = dev_alloc_skb(local->hw.extra_tx_headroom + |
| sizeof(*mgmt) + 6 + extra_len); |
| if (!skb) |
| return; |
| |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| |
| mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); |
| memset(mgmt, 0, 24 + 6); |
| mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| IEEE80211_STYPE_AUTH); |
| memcpy(mgmt->da, da, ETH_ALEN); |
| memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
| memcpy(mgmt->bssid, bssid, ETH_ALEN); |
| mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); |
| mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); |
| mgmt->u.auth.status_code = cpu_to_le16(0); |
| if (extra) |
| memcpy(skb_put(skb, extra_len), extra, extra_len); |
| |
| if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { |
| mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); |
| err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); |
| WARN_ON(err); |
| } |
| |
| IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| ieee80211_tx_skb(sdata, skb); |
| } |
| |
| int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, |
| const u8 *ie, size_t ie_len, |
| enum ieee80211_band band, u32 rate_mask, |
| u8 channel) |
| { |
| struct ieee80211_supported_band *sband; |
| u8 *pos; |
| size_t offset = 0, noffset; |
| int supp_rates_len, i; |
| u8 rates[32]; |
| int num_rates; |
| int ext_rates_len; |
| |
| sband = local->hw.wiphy->bands[band]; |
| |
| pos = buffer; |
| |
| num_rates = 0; |
| for (i = 0; i < sband->n_bitrates; i++) { |
| if ((BIT(i) & rate_mask) == 0) |
| continue; /* skip rate */ |
| rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5); |
| } |
| |
| supp_rates_len = min_t(int, num_rates, 8); |
| |
| *pos++ = WLAN_EID_SUPP_RATES; |
| *pos++ = supp_rates_len; |
| memcpy(pos, rates, supp_rates_len); |
| pos += supp_rates_len; |
| |
| /* insert "request information" if in custom IEs */ |
| if (ie && ie_len) { |
| static const u8 before_extrates[] = { |
| WLAN_EID_SSID, |
| WLAN_EID_SUPP_RATES, |
| WLAN_EID_REQUEST, |
| }; |
| noffset = ieee80211_ie_split(ie, ie_len, |
| before_extrates, |
| ARRAY_SIZE(before_extrates), |
| offset); |
| memcpy(pos, ie + offset, noffset - offset); |
| pos += noffset - offset; |
| offset = noffset; |
| } |
| |
| ext_rates_len = num_rates - supp_rates_len; |
| if (ext_rates_len > 0) { |
| *pos++ = WLAN_EID_EXT_SUPP_RATES; |
| *pos++ = ext_rates_len; |
| memcpy(pos, rates + supp_rates_len, ext_rates_len); |
| pos += ext_rates_len; |
| } |
| |
| if (channel && sband->band == IEEE80211_BAND_2GHZ) { |
| *pos++ = WLAN_EID_DS_PARAMS; |
| *pos++ = 1; |
| *pos++ = channel; |
| } |
| |
| /* insert custom IEs that go before HT */ |
| if (ie && ie_len) { |
| static const u8 before_ht[] = { |
| WLAN_EID_SSID, |
| WLAN_EID_SUPP_RATES, |
| WLAN_EID_REQUEST, |
| WLAN_EID_EXT_SUPP_RATES, |
| WLAN_EID_DS_PARAMS, |
| WLAN_EID_SUPPORTED_REGULATORY_CLASSES, |
| }; |
| noffset = ieee80211_ie_split(ie, ie_len, |
| before_ht, ARRAY_SIZE(before_ht), |
| offset); |
| memcpy(pos, ie + offset, noffset - offset); |
| pos += noffset - offset; |
| offset = noffset; |
| } |
| |
| if (sband->ht_cap.ht_supported) |
| pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, |
| sband->ht_cap.cap); |
| |
| /* |
| * If adding more here, adjust code in main.c |
| * that calculates local->scan_ies_len. |
| */ |
| |
| /* add any remaining custom IEs */ |
| if (ie && ie_len) { |
| noffset = ie_len; |
| memcpy(pos, ie + offset, noffset - offset); |
| pos += noffset - offset; |
| } |
| |
| return pos - buffer; |
| } |
| |
| struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, |
| u8 *dst, u32 ratemask, |
| const u8 *ssid, size_t ssid_len, |
| const u8 *ie, size_t ie_len, |
| bool directed) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| size_t buf_len; |
| u8 *buf; |
| u8 chan; |
| |
| /* FIXME: come up with a proper value */ |
| buf = kmalloc(200 + ie_len, GFP_KERNEL); |
| if (!buf) |
| return NULL; |
| |
| /* |
| * Do not send DS Channel parameter for directed probe requests |
| * in order to maximize the chance that we get a response. Some |
| * badly-behaved APs don't respond when this parameter is included. |
| */ |
| if (directed) |
| chan = 0; |
| else |
| chan = ieee80211_frequency_to_channel( |
| local->hw.conf.channel->center_freq); |
| |
| buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len, |
| local->hw.conf.channel->band, |
| ratemask, chan); |
| |
| skb = ieee80211_probereq_get(&local->hw, &sdata->vif, |
| ssid, ssid_len, |
| buf, buf_len); |
| if (!skb) |
| goto out; |
| |
| if (dst) { |
| mgmt = (struct ieee80211_mgmt *) skb->data; |
| memcpy(mgmt->da, dst, ETH_ALEN); |
| memcpy(mgmt->bssid, dst, ETH_ALEN); |
| } |
| |
| IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| |
| out: |
| kfree(buf); |
| |
| return skb; |
| } |
| |
| void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
| const u8 *ssid, size_t ssid_len, |
| const u8 *ie, size_t ie_len, |
| u32 ratemask, bool directed, bool no_cck) |
| { |
| struct sk_buff *skb; |
| |
| skb = ieee80211_build_probe_req(sdata, dst, ratemask, ssid, ssid_len, |
| ie, ie_len, directed); |
| if (skb) { |
| if (no_cck) |
| IEEE80211_SKB_CB(skb)->flags |= |
| IEEE80211_TX_CTL_NO_CCK_RATE; |
| ieee80211_tx_skb(sdata, skb); |
| } |
| } |
| |
| u32 ieee80211_sta_get_rates(struct ieee80211_local *local, |
| struct ieee802_11_elems *elems, |
| enum ieee80211_band band) |
| { |
| 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); |
| ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); |
| |
| cancel_work_sync(&local->reconfig_filter); |
| |
| flush_workqueue(local->workqueue); |
| drv_stop(local); |
| } |
| |
| int ieee80211_reconfig(struct ieee80211_local *local) |
| { |
| struct ieee80211_hw *hw = &local->hw; |
| struct ieee80211_sub_if_data *sdata; |
| struct sta_info *sta; |
| int res, i; |
| |
| #ifdef CONFIG_PM |
| if (local->suspended) |
| local->resuming = true; |
| |
| if (local->wowlan) { |
| local->wowlan = false; |
| res = drv_resume(local); |
| if (res < 0) { |
| local->resuming = false; |
| return res; |
| } |
| if (res == 0) |
| goto wake_up; |
| WARN_ON(res > 1); |
| /* |
| * res is 1, which means the driver requested |
| * to go through a regular reset on wakeup. |
| */ |
| } |
| #endif |
| /* everything else happens only if HW was up & running */ |
| if (!local->open_count) |
| goto wake_up; |
| |
| /* |
| * Upon resume hardware can sometimes be goofy due to |
| * various platform / driver / bus issues, so restarting |
| * the device may at times not work immediately. Propagate |
| * the error. |
| */ |
| res = drv_start(local); |
| if (res) { |
| WARN(local->suspended, "Hardware became unavailable " |
| "upon resume. This could be a software issue " |
| "prior to suspend or a hardware issue.\n"); |
| return res; |
| } |
| |
| /* setup fragmentation threshold */ |
| drv_set_frag_threshold(local, hw->wiphy->frag_threshold); |
| |
| /* setup RTS threshold */ |
| drv_set_rts_threshold(local, hw->wiphy->rts_threshold); |
| |
| /* reset coverage class */ |
| drv_set_coverage_class(local, hw->wiphy->coverage_class); |
| |
| ieee80211_led_radio(local, true); |
| ieee80211_mod_tpt_led_trig(local, |
| IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); |
| |
| /* add interfaces */ |
| list_for_each_entry(sdata, &local->interfaces, list) { |
| if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
| sdata->vif.type != NL80211_IFTYPE_MONITOR && |
| ieee80211_sdata_running(sdata)) |
| res = drv_add_interface(local, sdata); |
| } |
| |
| /* add STAs back */ |
| mutex_lock(&local->sta_mtx); |
| list_for_each_entry(sta, &local->sta_list, list) { |
| if (sta->uploaded) { |
| sdata = sta->sdata; |
| if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
| sdata = container_of(sdata->bss, |
| struct ieee80211_sub_if_data, |
| u.ap); |
| |
| WARN_ON(drv_sta_add(local, sdata, &sta->sta)); |
| } |
| } |
| mutex_unlock(&local->sta_mtx); |
| |
| /* reconfigure tx conf */ |
| 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 < hw->queues; i++) |
| drv_conf_tx(local, sdata, i, &sdata->tx_conf[i]); |
| } |
| |
| /* reconfigure hardware */ |
| ieee80211_hw_config(local, ~0); |
| |
| ieee80211_configure_filter(local); |
| |
| /* Finally also reconfigure all the BSS information */ |
| list_for_each_entry(sdata, &local->interfaces, list) { |
| u32 changed; |
| |
| if (!ieee80211_sdata_running(sdata)) |
| continue; |
| |
| /* common change flags for all interface types */ |
| changed = BSS_CHANGED_ERP_CTS_PROT | |
| BSS_CHANGED_ERP_PREAMBLE | |
| BSS_CHANGED_ERP_SLOT | |
| BSS_CHANGED_HT | |
| BSS_CHANGED_BASIC_RATES | |
| BSS_CHANGED_BEACON_INT | |
| BSS_CHANGED_BSSID | |
| BSS_CHANGED_CQM | |
| BSS_CHANGED_QOS | |
| BSS_CHANGED_IDLE; |
| |
| switch (sdata->vif.type) { |
| case NL80211_IFTYPE_STATION: |
| changed |= BSS_CHANGED_ASSOC | |
| BSS_CHANGED_ARP_FILTER; |
| mutex_lock(&sdata->u.mgd.mtx); |
| ieee80211_bss_info_change_notify(sdata, changed); |
| mutex_unlock(&sdata->u.mgd.mtx); |
| break; |
| case NL80211_IFTYPE_ADHOC: |
| changed |= BSS_CHANGED_IBSS; |
| /* fall through */ |
| case NL80211_IFTYPE_AP: |
| changed |= BSS_CHANGED_SSID; |
| |
| if (sdata->vif.type == NL80211_IFTYPE_AP) |
| changed |= BSS_CHANGED_AP_PROBE_RESP; |
| |
| /* fall through */ |
| case NL80211_IFTYPE_MESH_POINT: |
| changed |= BSS_CHANGED_BEACON | |
| BSS_CHANGED_BEACON_ENABLED; |
| ieee80211_bss_info_change_notify(sdata, changed); |
| break; |
| case NL80211_IFTYPE_WDS: |
| break; |
| case NL80211_IFTYPE_AP_VLAN: |
| case NL80211_IFTYPE_MONITOR: |
| /* ignore virtual */ |
| break; |
| case NL80211_IFTYPE_UNSPECIFIED: |
| case NUM_NL80211_IFTYPES: |
| case NL80211_IFTYPE_P2P_CLIENT: |
| case NL80211_IFTYPE_P2P_GO: |
| WARN_ON(1); |
| break; |
| } |
| } |
| |
| ieee80211_recalc_ps(local, -1); |
| |
| /* |
| * The sta might be in psm against the ap (e.g. because |
| * this was the state before a hw restart), so we |
| * explicitly send a null packet in order to make sure |
| * it'll sync against the ap (and get out of psm). |
| */ |
| if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { |
| list_for_each_entry(sdata, &local->interfaces, list) { |
| if (sdata->vif.type != NL80211_IFTYPE_STATION) |
| continue; |
| |
| ieee80211_send_nullfunc(local, sdata, 0); |
| } |
| } |
| |
| /* |
| * Clear the WLAN_STA_BLOCK_BA flag so new aggregation |
| * sessions can be established after a resume. |
| * |
| * Also tear down aggregation sessions since reconfiguring |
| * them in a hardware restart scenario is not easily done |
| * right now, and the hardware will have lost information |
| * about the sessions, but we and the AP still think they |
| * are active. This is really a workaround though. |
| */ |
| if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { |
| mutex_lock(&local->sta_mtx); |
| |
| list_for_each_entry(sta, &local->sta_list, list) { |
| ieee80211_sta_tear_down_BA_sessions(sta, true); |
| clear_sta_flag(sta, WLAN_STA_BLOCK_BA); |
| } |
| |
| mutex_unlock(&local->sta_mtx); |
| } |
| |
| /* add back keys */ |
| list_for_each_entry(sdata, &local->interfaces, list) |
| if (ieee80211_sdata_running(sdata)) |
| ieee80211_enable_keys(sdata); |
| |
| wake_up: |
| ieee80211_wake_queues_by_reason(hw, |
| IEEE80211_QUEUE_STOP_REASON_SUSPEND); |
| |
| /* |
| * If this is for hw restart things are still running. |
| * We may want to change that later, however. |
| */ |
| if (!local->suspended) |
| return 0; |
| |
| #ifdef CONFIG_PM |
| /* first set suspended false, then resuming */ |
| local->suspended = false; |
| mb(); |
| local->resuming = false; |
| |
| list_for_each_entry(sdata, &local->interfaces, list) { |
| switch(sdata->vif.type) { |
| case NL80211_IFTYPE_STATION: |
| ieee80211_sta_restart(sdata); |
| break; |
| case NL80211_IFTYPE_ADHOC: |
| ieee80211_ibss_restart(sdata); |
| break; |
| case NL80211_IFTYPE_MESH_POINT: |
| ieee80211_mesh_restart(sdata); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| mod_timer(&local->sta_cleanup, jiffies + 1); |
| |
| mutex_lock(&local->sta_mtx); |
| list_for_each_entry(sta, &local->sta_list, list) |
| mesh_plink_restart(sta); |
| mutex_unlock(&local->sta_mtx); |
| #else |
| WARN_ON(1); |
| #endif |
| return 0; |
| } |
| |
| void ieee80211_resume_disconnect(struct ieee80211_vif *vif) |
| { |
| struct ieee80211_sub_if_data *sdata; |
| struct ieee80211_local *local; |
| struct ieee80211_key *key; |
| |
| if (WARN_ON(!vif)) |
| return; |
| |
| sdata = vif_to_sdata(vif); |
| local = sdata->local; |
| |
| if (WARN_ON(!local->resuming)) |
| return; |
| |
| if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) |
| return; |
| |
| sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; |
| |
| mutex_lock(&local->key_mtx); |
| list_for_each_entry(key, &sdata->key_list, list) |
| key->flags |= KEY_FLAG_TAINTED; |
| mutex_unlock(&local->key_mtx); |
| } |
| EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); |
| |
| static int check_mgd_smps(struct ieee80211_if_managed *ifmgd, |
| enum ieee80211_smps_mode *smps_mode) |
| { |
| if (ifmgd->associated) { |
| *smps_mode = ifmgd->ap_smps; |
| |
| if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) { |
| if (ifmgd->powersave) |
| *smps_mode = IEEE80211_SMPS_DYNAMIC; |
| else |
| *smps_mode = IEEE80211_SMPS_OFF; |
| } |
| |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /* must hold iflist_mtx */ |
| void ieee80211_recalc_smps(struct ieee80211_local *local) |
| { |
| struct ieee80211_sub_if_data *sdata; |
| enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF; |
| int count = 0; |
| |
| lockdep_assert_held(&local->iflist_mtx); |
| |
| /* |
| * This function could be improved to handle multiple |
| * interfaces better, but right now it makes any |
| * non-station interfaces force SM PS to be turned |
| * off. If there are multiple station interfaces it |
| * could also use the best possible mode, e.g. if |
| * one is in static and the other in dynamic then |
| * dynamic is ok. |
| */ |
| |
| list_for_each_entry(sdata, &local->interfaces, list) { |
| if (!ieee80211_sdata_running(sdata)) |
| continue; |
| if (sdata->vif.type != NL80211_IFTYPE_STATION) |
| goto set; |
| |
| count += check_mgd_smps(&sdata->u.mgd, &smps_mode); |
| |
| if (count > 1) { |
| smps_mode = IEEE80211_SMPS_OFF; |
| break; |
| } |
| } |
| |
| if (smps_mode == local->smps_mode) |
| return; |
| |
| set: |
| local->smps_mode = smps_mode; |
| /* changed flag is auto-detected for this */ |
| ieee80211_hw_config(local, 0); |
| } |
| |
| static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id) |
| { |
| int i; |
| |
| for (i = 0; i < n_ids; i++) |
| if (ids[i] == id) |
| return true; |
| return false; |
| } |
| |
| /** |
| * ieee80211_ie_split - split an IE buffer according to ordering |
| * |
| * @ies: the IE buffer |
| * @ielen: the length of the IE buffer |
| * @ids: an array with element IDs that are allowed before |
| * the split |
| * @n_ids: the size of the element ID array |
| * @offset: offset where to start splitting in the buffer |
| * |
| * This function splits an IE buffer by updating the @offset |
| * variable to point to the location where the buffer should be |
| * split. |
| * |
| * It assumes that the given IE buffer is well-formed, this |
| * has to be guaranteed by the caller! |
| * |
| * It also assumes that the IEs in the buffer are ordered |
| * correctly, if not the result of using this function will not |
| * be ordered correctly either, i.e. it does no reordering. |
| * |
| * The function returns the offset where the next part of the |
| * buffer starts, which may be @ielen if the entire (remainder) |
| * of the buffer should be used. |
| */ |
| size_t ieee80211_ie_split(const u8 *ies, size_t ielen, |
| const u8 *ids, int n_ids, size_t offset) |
| { |
| size_t pos = offset; |
| |
| while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) |
| pos += 2 + ies[pos + 1]; |
| |
| return pos; |
| } |
| |
| size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) |
| { |
| size_t pos = offset; |
| |
| while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) |
| pos += 2 + ies[pos + 1]; |
| |
| return pos; |
| } |
| |
| static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, |
| int rssi_min_thold, |
| int rssi_max_thold) |
| { |
| trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); |
| |
| if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
| return; |
| |
| /* |
| * Scale up threshold values before storing it, as the RSSI averaging |
| * algorithm uses a scaled up value as well. Change this scaling |
| * factor if the RSSI averaging algorithm changes. |
| */ |
| sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; |
| sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; |
| } |
| |
| void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, |
| int rssi_min_thold, |
| int rssi_max_thold) |
| { |
| struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| |
| WARN_ON(rssi_min_thold == rssi_max_thold || |
| rssi_min_thold > rssi_max_thold); |
| |
| _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, |
| rssi_max_thold); |
| } |
| EXPORT_SYMBOL(ieee80211_enable_rssi_reports); |
| |
| void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) |
| { |
| struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| |
| _ieee80211_enable_rssi_reports(sdata, 0, 0); |
| } |
| EXPORT_SYMBOL(ieee80211_disable_rssi_reports); |
| |
| u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, |
| u16 cap) |
| { |
| __le16 tmp; |
| |
| *pos++ = WLAN_EID_HT_CAPABILITY; |
| *pos++ = sizeof(struct ieee80211_ht_cap); |
| memset(pos, 0, sizeof(struct ieee80211_ht_cap)); |
| |
| /* capability flags */ |
| tmp = cpu_to_le16(cap); |
| memcpy(pos, &tmp, sizeof(u16)); |
| pos += sizeof(u16); |
| |
| /* AMPDU parameters */ |
| *pos++ = ht_cap->ampdu_factor | |
| (ht_cap->ampdu_density << |
| IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); |
| |
| /* MCS set */ |
| memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); |
| pos += sizeof(ht_cap->mcs); |
| |
| /* extended capabilities */ |
| pos += sizeof(__le16); |
| |
| /* BF capabilities */ |
| pos += sizeof(__le32); |
| |
| /* antenna selection */ |
| pos += sizeof(u8); |
| |
| return pos; |
| } |
| |
| u8 *ieee80211_ie_build_ht_info(u8 *pos, |
| struct ieee80211_sta_ht_cap *ht_cap, |
| struct ieee80211_channel *channel, |
| enum nl80211_channel_type channel_type) |
| { |
| struct ieee80211_ht_info *ht_info; |
| /* Build HT Information */ |
| *pos++ = WLAN_EID_HT_INFORMATION; |
| *pos++ = sizeof(struct ieee80211_ht_info); |
| ht_info = (struct ieee80211_ht_info *)pos; |
| ht_info->control_chan = |
| ieee80211_frequency_to_channel(channel->center_freq); |
| switch (channel_type) { |
| case NL80211_CHAN_HT40MINUS: |
| ht_info->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; |
| break; |
| case NL80211_CHAN_HT40PLUS: |
| ht_info->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; |
| break; |
| case NL80211_CHAN_HT20: |
| default: |
| ht_info->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; |
| break; |
| } |
| if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) |
| ht_info->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; |
| |
| /* |
| * Note: According to 802.11n-2009 9.13.3.1, HT Protection field and |
| * RIFS Mode are reserved in IBSS mode, therefore keep them at 0 |
| */ |
| ht_info->operation_mode = 0x0000; |
| ht_info->stbc_param = 0x0000; |
| |
| /* It seems that Basic MCS set and Supported MCS set |
| are identical for the first 10 bytes */ |
| memset(&ht_info->basic_set, 0, 16); |
| memcpy(&ht_info->basic_set, &ht_cap->mcs, 10); |
| |
| return pos + sizeof(struct ieee80211_ht_info); |
| } |
| |
| enum nl80211_channel_type |
| ieee80211_ht_info_to_channel_type(struct ieee80211_ht_info *ht_info) |
| { |
| enum nl80211_channel_type channel_type; |
| |
| if (!ht_info) |
| return NL80211_CHAN_NO_HT; |
| |
| switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
| case IEEE80211_HT_PARAM_CHA_SEC_NONE: |
| channel_type = NL80211_CHAN_HT20; |
| break; |
| case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: |
| channel_type = NL80211_CHAN_HT40PLUS; |
| break; |
| case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
| channel_type = NL80211_CHAN_HT40MINUS; |
| break; |
| default: |
| channel_type = NL80211_CHAN_NO_HT; |
| } |
| |
| return channel_type; |
| } |
| |
| int ieee80211_add_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb) |
| { |
| struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_supported_band *sband; |
| int rate; |
| u8 i, rates, *pos; |
| |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| rates = sband->n_bitrates; |
| if (rates > 8) |
| rates = 8; |
| |
| if (skb_tailroom(skb) < rates + 2) |
| return -ENOMEM; |
| |
| pos = skb_put(skb, rates + 2); |
| *pos++ = WLAN_EID_SUPP_RATES; |
| *pos++ = rates; |
| for (i = 0; i < rates; i++) { |
| rate = sband->bitrates[i].bitrate; |
| *pos++ = (u8) (rate / 5); |
| } |
| |
| return 0; |
| } |
| |
| int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb) |
| { |
| struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_supported_band *sband; |
| int rate; |
| u8 i, exrates, *pos; |
| |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| exrates = sband->n_bitrates; |
| if (exrates > 8) |
| exrates -= 8; |
| else |
| exrates = 0; |
| |
| if (skb_tailroom(skb) < exrates + 2) |
| return -ENOMEM; |
| |
| if (exrates) { |
| pos = skb_put(skb, exrates + 2); |
| *pos++ = WLAN_EID_EXT_SUPP_RATES; |
| *pos++ = exrates; |
| for (i = 8; i < sband->n_bitrates; i++) { |
| rate = sband->bitrates[i].bitrate; |
| *pos++ = (u8) (rate / 5); |
| } |
| } |
| return 0; |
| } |