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- /*
- * BSS client mode implementation
- * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
- * Copyright 2004, Instant802 Networks, Inc.
- * Copyright 2005, Devicescape Software, Inc.
- * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
- * Copyright 2007, Michael Wu <flamingice@sourmilk.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.
- */
- #include <linux/delay.h>
- #include <linux/if_ether.h>
- #include <linux/skbuff.h>
- #include <linux/if_arp.h>
- #include <linux/etherdevice.h>
- #include <linux/moduleparam.h>
- #include <linux/rtnetlink.h>
- #include <linux/pm_qos.h>
- #include <linux/crc32.h>
- #include <linux/slab.h>
- #include <linux/export.h>
- #include <net/mac80211.h>
- #include <asm/unaligned.h>
- #include "ieee80211_i.h"
- #include "driver-ops.h"
- #include "rate.h"
- #include "led.h"
- #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
- #define IEEE80211_AUTH_MAX_TRIES 3
- #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
- #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
- #define IEEE80211_ASSOC_MAX_TRIES 3
- static int max_nullfunc_tries = 2;
- module_param(max_nullfunc_tries, int, 0644);
- MODULE_PARM_DESC(max_nullfunc_tries,
- "Maximum nullfunc tx tries before disconnecting (reason 4).");
- static int max_probe_tries = 5;
- module_param(max_probe_tries, int, 0644);
- MODULE_PARM_DESC(max_probe_tries,
- "Maximum probe tries before disconnecting (reason 4).");
- /*
- * Beacon loss timeout is calculated as N frames times the
- * advertised beacon interval. This may need to be somewhat
- * higher than what hardware might detect to account for
- * delays in the host processing frames. But since we also
- * probe on beacon miss before declaring the connection lost
- * default to what we want.
- */
- #define IEEE80211_BEACON_LOSS_COUNT 7
- /*
- * Time the connection can be idle before we probe
- * it to see if we can still talk to the AP.
- */
- #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
- /*
- * Time we wait for a probe response after sending
- * a probe request because of beacon loss or for
- * checking the connection still works.
- */
- static int probe_wait_ms = 500;
- module_param(probe_wait_ms, int, 0644);
- MODULE_PARM_DESC(probe_wait_ms,
- "Maximum time(ms) to wait for probe response"
- " before disconnecting (reason 4).");
- /*
- * Weight given to the latest Beacon frame when calculating average signal
- * strength for Beacon frames received in the current BSS. This must be
- * between 1 and 15.
- */
- #define IEEE80211_SIGNAL_AVE_WEIGHT 3
- /*
- * How many Beacon frames need to have been used in average signal strength
- * before starting to indicate signal change events.
- */
- #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
- #define TMR_RUNNING_TIMER 0
- #define TMR_RUNNING_CHANSW 1
- #define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */)
- /*
- * All cfg80211 functions have to be called outside a locked
- * section so that they can acquire a lock themselves... This
- * is much simpler than queuing up things in cfg80211, but we
- * do need some indirection for that here.
- */
- enum rx_mgmt_action {
- /* no action required */
- RX_MGMT_NONE,
- /* caller must call cfg80211_send_deauth() */
- RX_MGMT_CFG80211_DEAUTH,
- /* caller must call cfg80211_send_disassoc() */
- RX_MGMT_CFG80211_DISASSOC,
- /* caller must call cfg80211_send_rx_auth() */
- RX_MGMT_CFG80211_RX_AUTH,
- /* caller must call cfg80211_send_rx_assoc() */
- RX_MGMT_CFG80211_RX_ASSOC,
- /* caller must call cfg80211_send_assoc_timeout() */
- RX_MGMT_CFG80211_ASSOC_TIMEOUT,
- };
- /* utils */
- static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
- {
- lockdep_assert_held(&ifmgd->mtx);
- }
- /*
- * We can have multiple work items (and connection probing)
- * scheduling this timer, but we need to take care to only
- * reschedule it when it should fire _earlier_ than it was
- * asked for before, or if it's not pending right now. This
- * function ensures that. Note that it then is required to
- * run this function for all timeouts after the first one
- * has happened -- the work that runs from this timer will
- * do that.
- */
- static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
- {
- ASSERT_MGD_MTX(ifmgd);
- if (!timer_pending(&ifmgd->timer) ||
- time_before(timeout, ifmgd->timer.expires))
- mod_timer(&ifmgd->timer, timeout);
- }
- void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
- {
- if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
- return;
- mod_timer(&sdata->u.mgd.bcn_mon_timer,
- round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
- }
- void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- if (unlikely(!sdata->u.mgd.associated))
- return;
- if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
- return;
- mod_timer(&sdata->u.mgd.conn_mon_timer,
- round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
- ifmgd->probe_send_count = 0;
- }
- static int ecw2cw(int ecw)
- {
- return (1 << ecw) - 1;
- }
- /*
- * ieee80211_enable_ht should be called only after the operating band
- * has been determined as ht configuration depends on the hw's
- * HT abilities for a specific band.
- */
- static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_ht_info *hti,
- const u8 *bssid, u16 ap_ht_cap_flags,
- bool beacon_htcap_ie)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_supported_band *sband;
- struct sta_info *sta;
- u32 changed = 0;
- int hti_cfreq;
- u16 ht_opmode;
- bool enable_ht = true, queues_stopped = false;
- enum nl80211_channel_type prev_chantype;
- enum nl80211_channel_type rx_channel_type = NL80211_CHAN_NO_HT;
- enum nl80211_channel_type tx_channel_type;
- sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
- prev_chantype = sdata->vif.bss_conf.channel_type;
- hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
- sband->band);
- /* check that channel matches the right operating channel */
- if (local->hw.conf.channel->center_freq != hti_cfreq) {
- /* Some APs mess this up, evidently.
- * Netgear WNDR3700 sometimes reports 4 higher than
- * the actual channel, for instance.
- */
- printk(KERN_DEBUG
- "%s: Wrong control channel in association"
- " response: configured center-freq: %d"
- " hti-cfreq: %d hti->control_chan: %d"
- " band: %d. Disabling HT.\n",
- sdata->name,
- local->hw.conf.channel->center_freq,
- hti_cfreq, hti->control_chan,
- sband->band);
- enable_ht = false;
- }
- if (enable_ht) {
- rx_channel_type = NL80211_CHAN_HT20;
- if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
- !ieee80111_cfg_override_disables_ht40(sdata) &&
- (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
- (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
- switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
- case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
- rx_channel_type = NL80211_CHAN_HT40PLUS;
- break;
- case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
- rx_channel_type = NL80211_CHAN_HT40MINUS;
- break;
- }
- }
- }
- tx_channel_type = ieee80211_get_tx_channel_type(local, rx_channel_type);
- if (local->tmp_channel)
- local->tmp_channel_type = rx_channel_type;
- if (!ieee80211_set_channel_type(local, sdata, rx_channel_type)) {
- /* can only fail due to HT40+/- mismatch */
- rx_channel_type = NL80211_CHAN_HT20;
- WARN_ON(!ieee80211_set_channel_type(local, sdata,
- rx_channel_type));
- }
- if (beacon_htcap_ie && (prev_chantype != rx_channel_type)) {
- /*
- * Whenever the AP announces the HT mode change that can be
- * 40MHz intolerant or etc., it would be safer to stop tx
- * queues before doing hw config to avoid buffer overflow.
- */
- ieee80211_stop_queues_by_reason(&sdata->local->hw,
- IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
- queues_stopped = true;
- /* flush out all packets */
- synchronize_net();
- drv_flush(local, false);
- }
- /* channel_type change automatically detected */
- ieee80211_hw_config(local, 0);
- if (prev_chantype != tx_channel_type) {
- rcu_read_lock();
- sta = sta_info_get(sdata, bssid);
- if (sta)
- rate_control_rate_update(local, sband, sta,
- IEEE80211_RC_HT_CHANGED,
- tx_channel_type);
- rcu_read_unlock();
- }
- if (queues_stopped)
- ieee80211_wake_queues_by_reason(&sdata->local->hw,
- IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
- ht_opmode = le16_to_cpu(hti->operation_mode);
- /* if bss configuration changed store the new one */
- if (sdata->ht_opmode_valid != enable_ht ||
- sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
- prev_chantype != rx_channel_type) {
- changed |= BSS_CHANGED_HT;
- sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
- sdata->ht_opmode_valid = enable_ht;
- }
- return changed;
- }
- /* frame sending functions */
- static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
- struct ieee80211_supported_band *sband,
- u32 *rates)
- {
- int i, j, count;
- *rates = 0;
- count = 0;
- for (i = 0; i < supp_rates_len; i++) {
- int rate = (supp_rates[i] & 0x7F) * 5;
- for (j = 0; j < sband->n_bitrates; j++)
- if (sband->bitrates[j].bitrate == rate) {
- *rates |= BIT(j);
- count++;
- break;
- }
- }
- return count;
- }
- static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
- struct sk_buff *skb, const u8 *ht_info_ie,
- struct ieee80211_supported_band *sband,
- struct ieee80211_channel *channel,
- enum ieee80211_smps_mode smps)
- {
- struct ieee80211_ht_info *ht_info;
- u8 *pos;
- u32 flags = channel->flags;
- u16 cap;
- struct ieee80211_sta_ht_cap ht_cap;
- BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
- if (!ht_info_ie)
- return;
- if (ht_info_ie[1] < sizeof(struct ieee80211_ht_info))
- return;
- memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
- ieee80211_apply_htcap_overrides(sdata, &ht_cap);
- ht_info = (struct ieee80211_ht_info *)(ht_info_ie + 2);
- /* determine capability flags */
- cap = ht_cap.cap;
- switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
- case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
- if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
- cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
- cap &= ~IEEE80211_HT_CAP_SGI_40;
- }
- break;
- case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
- if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
- cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
- cap &= ~IEEE80211_HT_CAP_SGI_40;
- }
- break;
- }
- /* set SM PS mode properly */
- cap &= ~IEEE80211_HT_CAP_SM_PS;
- switch (smps) {
- case IEEE80211_SMPS_AUTOMATIC:
- case IEEE80211_SMPS_NUM_MODES:
- WARN_ON(1);
- case IEEE80211_SMPS_OFF:
- cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
- IEEE80211_HT_CAP_SM_PS_SHIFT;
- break;
- case IEEE80211_SMPS_STATIC:
- cap |= WLAN_HT_CAP_SM_PS_STATIC <<
- IEEE80211_HT_CAP_SM_PS_SHIFT;
- break;
- case IEEE80211_SMPS_DYNAMIC:
- cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
- IEEE80211_HT_CAP_SM_PS_SHIFT;
- break;
- }
- /* reserve and fill IE */
- pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
- ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
- }
- static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
- struct sk_buff *skb,
- struct ieee80211_supported_band *sband)
- {
- u8 *pos;
- u32 cap;
- struct ieee80211_sta_vht_cap vht_cap;
- BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
- memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
- /* determine capability flags */
- cap = vht_cap.cap;
- /* reserve and fill IE */
- pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
- ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
- }
- static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
- struct sk_buff *skb;
- struct ieee80211_mgmt *mgmt;
- u8 *pos, qos_info;
- size_t offset = 0, noffset;
- int i, count, rates_len, supp_rates_len;
- u16 capab;
- struct ieee80211_supported_band *sband;
- u32 rates = 0;
- lockdep_assert_held(&ifmgd->mtx);
- sband = local->hw.wiphy->bands[local->oper_channel->band];
- if (assoc_data->supp_rates_len) {
- /*
- * Get all rates supported by the device and the AP as
- * some APs don't like getting a superset of their rates
- * in the association request (e.g. D-Link DAP 1353 in
- * b-only mode)...
- */
- rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
- assoc_data->supp_rates_len,
- sband, &rates);
- } else {
- /*
- * In case AP not provide any supported rates information
- * before association, we send information element(s) with
- * all rates that we support.
- */
- rates = ~0;
- rates_len = sband->n_bitrates;
- }
- skb = alloc_skb(local->hw.extra_tx_headroom +
- sizeof(*mgmt) + /* bit too much but doesn't matter */
- 2 + assoc_data->ssid_len + /* SSID */
- 4 + rates_len + /* (extended) rates */
- 4 + /* power capability */
- 2 + 2 * sband->n_channels + /* supported channels */
- 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
- 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
- assoc_data->ie_len + /* extra IEs */
- 9, /* WMM */
- GFP_KERNEL);
- if (!skb)
- return;
- skb_reserve(skb, local->hw.extra_tx_headroom);
- capab = WLAN_CAPABILITY_ESS;
- if (sband->band == IEEE80211_BAND_2GHZ) {
- if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
- capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
- if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
- capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
- }
- if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
- capab |= WLAN_CAPABILITY_PRIVACY;
- if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
- (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
- capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
- mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
- memset(mgmt, 0, 24);
- memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
- memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
- memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
- if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
- skb_put(skb, 10);
- mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
- IEEE80211_STYPE_REASSOC_REQ);
- mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
- mgmt->u.reassoc_req.listen_interval =
- cpu_to_le16(local->hw.conf.listen_interval);
- memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
- ETH_ALEN);
- } else {
- skb_put(skb, 4);
- mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
- IEEE80211_STYPE_ASSOC_REQ);
- mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
- mgmt->u.assoc_req.listen_interval =
- cpu_to_le16(local->hw.conf.listen_interval);
- }
- /* SSID */
- pos = skb_put(skb, 2 + assoc_data->ssid_len);
- *pos++ = WLAN_EID_SSID;
- *pos++ = assoc_data->ssid_len;
- memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
- /* add all rates which were marked to be used above */
- supp_rates_len = rates_len;
- if (supp_rates_len > 8)
- supp_rates_len = 8;
- pos = skb_put(skb, supp_rates_len + 2);
- *pos++ = WLAN_EID_SUPP_RATES;
- *pos++ = supp_rates_len;
- count = 0;
- for (i = 0; i < sband->n_bitrates; i++) {
- if (BIT(i) & rates) {
- int rate = sband->bitrates[i].bitrate;
- *pos++ = (u8) (rate / 5);
- if (++count == 8)
- break;
- }
- }
- if (rates_len > count) {
- pos = skb_put(skb, rates_len - count + 2);
- *pos++ = WLAN_EID_EXT_SUPP_RATES;
- *pos++ = rates_len - count;
- for (i++; i < sband->n_bitrates; i++) {
- if (BIT(i) & rates) {
- int rate = sband->bitrates[i].bitrate;
- *pos++ = (u8) (rate / 5);
- }
- }
- }
- if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
- /* 1. power capabilities */
- pos = skb_put(skb, 4);
- *pos++ = WLAN_EID_PWR_CAPABILITY;
- *pos++ = 2;
- *pos++ = 0; /* min tx power */
- *pos++ = local->oper_channel->max_power; /* max tx power */
- /* 2. supported channels */
- /* TODO: get this in reg domain format */
- pos = skb_put(skb, 2 * sband->n_channels + 2);
- *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
- *pos++ = 2 * sband->n_channels;
- for (i = 0; i < sband->n_channels; i++) {
- *pos++ = ieee80211_frequency_to_channel(
- sband->channels[i].center_freq);
- *pos++ = 1; /* one channel in the subband*/
- }
- }
- /* if present, add any custom IEs that go before HT */
- if (assoc_data->ie_len && assoc_data->ie) {
- static const u8 before_ht[] = {
- WLAN_EID_SSID,
- WLAN_EID_SUPP_RATES,
- WLAN_EID_EXT_SUPP_RATES,
- WLAN_EID_PWR_CAPABILITY,
- WLAN_EID_SUPPORTED_CHANNELS,
- WLAN_EID_RSN,
- WLAN_EID_QOS_CAPA,
- WLAN_EID_RRM_ENABLED_CAPABILITIES,
- WLAN_EID_MOBILITY_DOMAIN,
- WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
- };
- noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
- before_ht, ARRAY_SIZE(before_ht),
- offset);
- pos = skb_put(skb, noffset - offset);
- memcpy(pos, assoc_data->ie + offset, noffset - offset);
- offset = noffset;
- }
- if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
- ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_information_ie,
- sband, local->oper_channel, ifmgd->ap_smps);
- if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
- ieee80211_add_vht_ie(sdata, skb, sband);
- /* if present, add any custom non-vendor IEs that go after HT */
- if (assoc_data->ie_len && assoc_data->ie) {
- noffset = ieee80211_ie_split_vendor(assoc_data->ie,
- assoc_data->ie_len,
- offset);
- pos = skb_put(skb, noffset - offset);
- memcpy(pos, assoc_data->ie + offset, noffset - offset);
- offset = noffset;
- }
- if (assoc_data->wmm) {
- if (assoc_data->uapsd) {
- qos_info = ifmgd->uapsd_queues;
- qos_info |= (ifmgd->uapsd_max_sp_len <<
- IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
- } else {
- qos_info = 0;
- }
- pos = skb_put(skb, 9);
- *pos++ = WLAN_EID_VENDOR_SPECIFIC;
- *pos++ = 7; /* len */
- *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
- *pos++ = 0x50;
- *pos++ = 0xf2;
- *pos++ = 2; /* WME */
- *pos++ = 0; /* WME info */
- *pos++ = 1; /* WME ver */
- *pos++ = qos_info;
- }
- /* add any remaining custom (i.e. vendor specific here) IEs */
- if (assoc_data->ie_len && assoc_data->ie) {
- noffset = assoc_data->ie_len;
- pos = skb_put(skb, noffset - offset);
- memcpy(pos, assoc_data->ie + offset, noffset - offset);
- }
- IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
- ieee80211_tx_skb(sdata, skb);
- }
- static 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 ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- 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 +
- DEAUTH_DISASSOC_LEN);
- if (!skb)
- return;
- skb_reserve(skb, local->hw.extra_tx_headroom);
- /* copy in frame */
- memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
- mgmt, DEAUTH_DISASSOC_LEN);
- if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
- IEEE80211_SKB_CB(skb)->flags |=
- IEEE80211_TX_INTFL_DONT_ENCRYPT;
- ieee80211_tx_skb(sdata, skb);
- }
- }
- void ieee80211_send_pspoll(struct ieee80211_local *local,
- struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_pspoll *pspoll;
- struct sk_buff *skb;
- skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
- if (!skb)
- return;
- pspoll = (struct ieee80211_pspoll *) skb->data;
- pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
- IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
- ieee80211_tx_skb(sdata, skb);
- }
- void ieee80211_send_nullfunc(struct ieee80211_local *local,
- struct ieee80211_sub_if_data *sdata,
- int powersave)
- {
- struct sk_buff *skb;
- struct ieee80211_hdr_3addr *nullfunc;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
- if (!skb)
- return;
- nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
- if (powersave)
- nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
- IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
- if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
- IEEE80211_STA_CONNECTION_POLL))
- IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
- ieee80211_tx_skb(sdata, skb);
- }
- static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
- struct ieee80211_sub_if_data *sdata)
- {
- struct sk_buff *skb;
- struct ieee80211_hdr *nullfunc;
- __le16 fc;
- if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
- return;
- skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
- if (!skb)
- return;
- skb_reserve(skb, local->hw.extra_tx_headroom);
- nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
- memset(nullfunc, 0, 30);
- fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
- IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
- nullfunc->frame_control = fc;
- memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
- memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
- memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
- memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
- IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
- ieee80211_tx_skb(sdata, skb);
- }
- /* spectrum management related things */
- static void ieee80211_chswitch_work(struct work_struct *work)
- {
- struct ieee80211_sub_if_data *sdata =
- container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- if (!ieee80211_sdata_running(sdata))
- return;
- mutex_lock(&ifmgd->mtx);
- if (!ifmgd->associated)
- goto out;
- sdata->local->oper_channel = sdata->local->csa_channel;
- if (!sdata->local->ops->channel_switch) {
- /* call "hw_config" only if doing sw channel switch */
- ieee80211_hw_config(sdata->local,
- IEEE80211_CONF_CHANGE_CHANNEL);
- } else {
- /* update the device channel directly */
- sdata->local->hw.conf.channel = sdata->local->oper_channel;
- }
- /* XXX: shouldn't really modify cfg80211-owned data! */
- ifmgd->associated->channel = sdata->local->oper_channel;
- ieee80211_wake_queues_by_reason(&sdata->local->hw,
- IEEE80211_QUEUE_STOP_REASON_CSA);
- out:
- ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
- mutex_unlock(&ifmgd->mtx);
- }
- void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
- {
- struct ieee80211_sub_if_data *sdata;
- struct ieee80211_if_managed *ifmgd;
- sdata = vif_to_sdata(vif);
- ifmgd = &sdata->u.mgd;
- trace_api_chswitch_done(sdata, success);
- if (!success) {
- /*
- * If the channel switch was not successful, stay
- * around on the old channel. We currently lack
- * good handling of this situation, possibly we
- * should just drop the association.
- */
- sdata->local->csa_channel = sdata->local->oper_channel;
- }
- ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
- }
- EXPORT_SYMBOL(ieee80211_chswitch_done);
- static void ieee80211_chswitch_timer(unsigned long data)
- {
- struct ieee80211_sub_if_data *sdata =
- (struct ieee80211_sub_if_data *) data;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- if (sdata->local->quiescing) {
- set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
- return;
- }
- ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
- }
- void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_channel_sw_ie *sw_elem,
- struct ieee80211_bss *bss,
- u64 timestamp)
- {
- struct cfg80211_bss *cbss =
- container_of((void *)bss, struct cfg80211_bss, priv);
- struct ieee80211_channel *new_ch;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
- cbss->channel->band);
- ASSERT_MGD_MTX(ifmgd);
- if (!ifmgd->associated)
- return;
- if (sdata->local->scanning)
- return;
- /* Disregard subsequent beacons if we are already running a timer
- processing a CSA */
- if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
- return;
- new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
- if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
- return;
- sdata->local->csa_channel = new_ch;
- if (sdata->local->ops->channel_switch) {
- /* use driver's channel switch callback */
- struct ieee80211_channel_switch ch_switch;
- memset(&ch_switch, 0, sizeof(ch_switch));
- ch_switch.timestamp = timestamp;
- if (sw_elem->mode) {
- ch_switch.block_tx = true;
- ieee80211_stop_queues_by_reason(&sdata->local->hw,
- IEEE80211_QUEUE_STOP_REASON_CSA);
- }
- ch_switch.channel = new_ch;
- ch_switch.count = sw_elem->count;
- ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
- drv_channel_switch(sdata->local, &ch_switch);
- return;
- }
- /* channel switch handled in software */
- if (sw_elem->count <= 1) {
- ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
- } else {
- if (sw_elem->mode)
- ieee80211_stop_queues_by_reason(&sdata->local->hw,
- IEEE80211_QUEUE_STOP_REASON_CSA);
- ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
- mod_timer(&ifmgd->chswitch_timer,
- jiffies +
- msecs_to_jiffies(sw_elem->count *
- cbss->beacon_interval));
- }
- }
- static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
- u16 capab_info, u8 *pwr_constr_elem,
- u8 pwr_constr_elem_len)
- {
- struct ieee80211_conf *conf = &sdata->local->hw.conf;
- if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
- return;
- /* Power constraint IE length should be 1 octet */
- if (pwr_constr_elem_len != 1)
- return;
- if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
- (*pwr_constr_elem != sdata->local->power_constr_level)) {
- sdata->local->power_constr_level = *pwr_constr_elem;
- ieee80211_hw_config(sdata->local, 0);
- }
- }
- void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
- {
- struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_conf *conf = &local->hw.conf;
- WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
- !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
- (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
- local->disable_dynamic_ps = false;
- conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
- }
- EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
- void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
- {
- struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_conf *conf = &local->hw.conf;
- WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
- !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
- (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
- local->disable_dynamic_ps = true;
- conf->dynamic_ps_timeout = 0;
- del_timer_sync(&local->dynamic_ps_timer);
- ieee80211_queue_work(&local->hw,
- &local->dynamic_ps_enable_work);
- }
- EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
- /* powersave */
- static void ieee80211_enable_ps(struct ieee80211_local *local,
- struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_conf *conf = &local->hw.conf;
- /*
- * If we are scanning right now then the parameters will
- * take effect when scan finishes.
- */
- if (local->scanning)
- return;
- if (conf->dynamic_ps_timeout > 0 &&
- !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
- mod_timer(&local->dynamic_ps_timer, jiffies +
- msecs_to_jiffies(conf->dynamic_ps_timeout));
- } else {
- if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
- ieee80211_send_nullfunc(local, sdata, 1);
- if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
- (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
- return;
- conf->flags |= IEEE80211_CONF_PS;
- ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
- }
- }
- static void ieee80211_change_ps(struct ieee80211_local *local)
- {
- struct ieee80211_conf *conf = &local->hw.conf;
- if (local->ps_sdata) {
- ieee80211_enable_ps(local, local->ps_sdata);
- } else if (conf->flags & IEEE80211_CONF_PS) {
- conf->flags &= ~IEEE80211_CONF_PS;
- ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
- del_timer_sync(&local->dynamic_ps_timer);
- cancel_work_sync(&local->dynamic_ps_enable_work);
- }
- }
- static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_if_managed *mgd = &sdata->u.mgd;
- struct sta_info *sta = NULL;
- bool authorized = false;
- if (!mgd->powersave)
- return false;
- if (mgd->broken_ap)
- return false;
- if (!mgd->associated)
- return false;
- if (!mgd->associated->beacon_ies)
- return false;
- if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
- IEEE80211_STA_CONNECTION_POLL))
- return false;
- rcu_read_lock();
- sta = sta_info_get(sdata, mgd->bssid);
- if (sta)
- authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
- rcu_read_unlock();
- return authorized;
- }
- /* need to hold RTNL or interface lock */
- void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
- {
- struct ieee80211_sub_if_data *sdata, *found = NULL;
- int count = 0;
- int timeout;
- if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
- local->ps_sdata = NULL;
- return;
- }
- if (!list_empty(&local->work_list)) {
- local->ps_sdata = NULL;
- goto change;
- }
- list_for_each_entry(sdata, &local->interfaces, list) {
- if (!ieee80211_sdata_running(sdata))
- continue;
- if (sdata->vif.type == NL80211_IFTYPE_AP) {
- /* If an AP vif is found, then disable PS
- * by setting the count to zero thereby setting
- * ps_sdata to NULL.
- */
- count = 0;
- break;
- }
- if (sdata->vif.type != NL80211_IFTYPE_STATION)
- continue;
- found = sdata;
- count++;
- }
- if (count == 1 && ieee80211_powersave_allowed(found)) {
- struct ieee80211_conf *conf = &local->hw.conf;
- s32 beaconint_us;
- if (latency < 0)
- latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
- beaconint_us = ieee80211_tu_to_usec(
- found->vif.bss_conf.beacon_int);
- timeout = local->dynamic_ps_forced_timeout;
- if (timeout < 0) {
- /*
- * Go to full PSM if the user configures a very low
- * latency requirement.
- * The 2000 second value is there for compatibility
- * until the PM_QOS_NETWORK_LATENCY is configured
- * with real values.
- */
- if (latency > (1900 * USEC_PER_MSEC) &&
- latency != (2000 * USEC_PER_SEC))
- timeout = 0;
- else
- timeout = 100;
- }
- local->dynamic_ps_user_timeout = timeout;
- if (!local->disable_dynamic_ps)
- conf->dynamic_ps_timeout =
- local->dynamic_ps_user_timeout;
- if (beaconint_us > latency) {
- local->ps_sdata = NULL;
- } else {
- struct ieee80211_bss *bss;
- int maxslp = 1;
- u8 dtimper;
- bss = (void *)found->u.mgd.associated->priv;
- dtimper = bss->dtim_period;
- /* If the TIM IE is invalid, pretend the value is 1 */
- if (!dtimper)
- dtimper = 1;
- else if (dtimper > 1)
- maxslp = min_t(int, dtimper,
- latency / beaconint_us);
- local->hw.conf.max_sleep_period = maxslp;
- local->hw.conf.ps_dtim_period = dtimper;
- local->ps_sdata = found;
- }
- } else {
- local->ps_sdata = NULL;
- }
- change:
- ieee80211_change_ps(local);
- }
- void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
- {
- struct ieee80211_local *local =
- container_of(work, struct ieee80211_local,
- dynamic_ps_disable_work);
- if (local->hw.conf.flags & IEEE80211_CONF_PS) {
- local->hw.conf.flags &= ~IEEE80211_CONF_PS;
- ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
- }
- ieee80211_wake_queues_by_reason(&local->hw,
- IEEE80211_QUEUE_STOP_REASON_PS);
- }
- void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
- {
- struct ieee80211_local *local =
- container_of(work, struct ieee80211_local,
- dynamic_ps_enable_work);
- struct ieee80211_sub_if_data *sdata = local->ps_sdata;
- struct ieee80211_if_managed *ifmgd;
- unsigned long flags;
- int q;
- /* can only happen when PS was just disabled anyway */
- if (!sdata)
- return;
- ifmgd = &sdata->u.mgd;
- if (local->hw.conf.flags & IEEE80211_CONF_PS)
- return;
- if (!local->disable_dynamic_ps &&
- local->hw.conf.dynamic_ps_timeout > 0) {
- /* don't enter PS if TX frames are pending */
- if (drv_tx_frames_pending(local)) {
- mod_timer(&local->dynamic_ps_timer, jiffies +
- msecs_to_jiffies(
- local->hw.conf.dynamic_ps_timeout));
- return;
- }
- /*
- * transmission can be stopped by others which leads to
- * dynamic_ps_timer expiry. Postpone the ps timer if it
- * is not the actual idle state.
- */
- spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
- for (q = 0; q < local->hw.queues; q++) {
- if (local->queue_stop_reasons[q]) {
- spin_unlock_irqrestore(&local->queue_stop_reason_lock,
- flags);
- mod_timer(&local->dynamic_ps_timer, jiffies +
- msecs_to_jiffies(
- local->hw.conf.dynamic_ps_timeout));
- return;
- }
- }
- spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
- }
- if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
- !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
- netif_tx_stop_all_queues(sdata->dev);
- if (drv_tx_frames_pending(local))
- mod_timer(&local->dynamic_ps_timer, jiffies +
- msecs_to_jiffies(
- local->hw.conf.dynamic_ps_timeout));
- else {
- ieee80211_send_nullfunc(local, sdata, 1);
- /* Flush to get the tx status of nullfunc frame */
- drv_flush(local, false);
- }
- }
- if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
- (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
- (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
- ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
- local->hw.conf.flags |= IEEE80211_CONF_PS;
- ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
- }
- if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
- netif_tx_wake_all_queues(sdata->dev);
- }
- void ieee80211_dynamic_ps_timer(unsigned long data)
- {
- struct ieee80211_local *local = (void *) data;
- if (local->quiescing || local->suspended)
- return;
- ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
- }
- /* MLME */
- static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
- struct ieee80211_sub_if_data *sdata,
- u8 *wmm_param, size_t wmm_param_len)
- {
- struct ieee80211_tx_queue_params params;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- size_t left;
- int count;
- u8 *pos, uapsd_queues = 0;
- if (!local->ops->conf_tx)
- return;
- if (local->hw.queues < 4)
- return;
- if (!wmm_param)
- return;
- if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
- return;
- if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
- uapsd_queues = ifmgd->uapsd_queues;
- count = wmm_param[6] & 0x0f;
- if (count == ifmgd->wmm_last_param_set)
- return;
- ifmgd->wmm_last_param_set = count;
- pos = wmm_param + 8;
- left = wmm_param_len - 8;
- memset(¶ms, 0, sizeof(params));
- local->wmm_acm = 0;
- for (; left >= 4; left -= 4, pos += 4) {
- int aci = (pos[0] >> 5) & 0x03;
- int acm = (pos[0] >> 4) & 0x01;
- bool uapsd = false;
- int queue;
- switch (aci) {
- case 1: /* AC_BK */
- queue = 3;
- if (acm)
- local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
- if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
- uapsd = true;
- break;
- case 2: /* AC_VI */
- queue = 1;
- if (acm)
- local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
- if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
- uapsd = true;
- break;
- case 3: /* AC_VO */
- queue = 0;
- if (acm)
- local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
- if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
- uapsd = true;
- break;
- case 0: /* AC_BE */
- default:
- queue = 2;
- if (acm)
- local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
- if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
- uapsd = true;
- break;
- }
- params.aifs = pos[0] & 0x0f;
- params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
- params.cw_min = ecw2cw(pos[1] & 0x0f);
- params.txop = get_unaligned_le16(pos + 2);
- params.uapsd = uapsd;
- #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- wiphy_debug(local->hw.wiphy,
- "WMM queue=%d aci=%d acm=%d aifs=%d "
- "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
- queue, aci, acm,
- params.aifs, params.cw_min, params.cw_max,
- params.txop, params.uapsd);
- #endif
- sdata->tx_conf[queue] = params;
- if (drv_conf_tx(local, sdata, queue, ¶ms))
- wiphy_debug(local->hw.wiphy,
- "failed to set TX queue parameters for queue %d\n",
- queue);
- }
- /* enable WMM or activate new settings */
- sdata->vif.bss_conf.qos = true;
- }
- static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
- u16 capab, bool erp_valid, u8 erp)
- {
- struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
- u32 changed = 0;
- bool use_protection;
- bool use_short_preamble;
- bool use_short_slot;
- if (erp_valid) {
- use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
- use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
- } else {
- use_protection = false;
- use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
- }
- use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
- if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
- use_short_slot = true;
- if (use_protection != bss_conf->use_cts_prot) {
- bss_conf->use_cts_prot = use_protection;
- changed |= BSS_CHANGED_ERP_CTS_PROT;
- }
- if (use_short_preamble != bss_conf->use_short_preamble) {
- bss_conf->use_short_preamble = use_short_preamble;
- changed |= BSS_CHANGED_ERP_PREAMBLE;
- }
- if (use_short_slot != bss_conf->use_short_slot) {
- bss_conf->use_short_slot = use_short_slot;
- changed |= BSS_CHANGED_ERP_SLOT;
- }
- return changed;
- }
- static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
- struct cfg80211_bss *cbss,
- u32 bss_info_changed)
- {
- struct ieee80211_bss *bss = (void *)cbss->priv;
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
- bss_info_changed |= BSS_CHANGED_ASSOC;
- /* set timing information */
- bss_conf->beacon_int = cbss->beacon_interval;
- bss_conf->last_tsf = cbss->tsf;
- bss_info_changed |= BSS_CHANGED_BEACON_INT;
- bss_info_changed |= ieee80211_handle_bss_capability(sdata,
- cbss->capability, bss->has_erp_value, bss->erp_value);
- sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
- IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
- sdata->u.mgd.associated = cbss;
- memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
- sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
- /* just to be sure */
- sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
- IEEE80211_STA_BEACON_POLL);
- ieee80211_led_assoc(local, 1);
- if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
- bss_conf->dtim_period = bss->dtim_period;
- else
- bss_conf->dtim_period = 0;
- bss_conf->assoc = 1;
- /* Tell the driver to monitor connection quality (if supported) */
- if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
- bss_conf->cqm_rssi_thold)
- bss_info_changed |= BSS_CHANGED_CQM;
- /* Enable ARP filtering */
- if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
- bss_conf->arp_filter_enabled = sdata->arp_filter_state;
- bss_info_changed |= BSS_CHANGED_ARP_FILTER;
- }
- ieee80211_bss_info_change_notify(sdata, bss_info_changed);
- mutex_lock(&local->iflist_mtx);
- ieee80211_recalc_ps(local, -1);
- ieee80211_recalc_smps(local);
- mutex_unlock(&local->iflist_mtx);
- netif_tx_start_all_queues(sdata->dev);
- netif_carrier_on(sdata->dev);
- }
- static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
- u16 stype, u16 reason, bool tx,
- u8 *frame_buf)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_local *local = sdata->local;
- struct sta_info *sta;
- u32 changed = 0;
- ASSERT_MGD_MTX(ifmgd);
- if (WARN_ON_ONCE(tx && !frame_buf))
- return;
- if (WARN_ON(!ifmgd->associated))
- return;
- ifmgd->associated = NULL;
- /*
- * we need to commit the associated = NULL change because the
- * scan code uses that to determine whether this iface should
- * go to/wake up from powersave or not -- and could otherwise
- * wake the queues erroneously.
- */
- smp_mb();
- /*
- * Thus, we can only afterwards stop the queues -- to account
- * for the case where another CPU is finishing a scan at this
- * time -- we don't want the scan code to enable queues.
- */
- netif_tx_stop_all_queues(sdata->dev);
- netif_carrier_off(sdata->dev);
- mutex_lock(&local->sta_mtx);
- sta = sta_info_get(sdata, ifmgd->bssid);
- if (sta) {
- set_sta_flag(sta, WLAN_STA_BLOCK_BA);
- ieee80211_sta_tear_down_BA_sessions(sta, tx);
- }
- mutex_unlock(&local->sta_mtx);
- /* deauthenticate/disassociate now */
- if (tx || frame_buf)
- ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
- reason, tx, frame_buf);
- /* flush out frame */
- if (tx)
- drv_flush(local, false);
- /* clear bssid only after building the needed mgmt frames */
- memset(ifmgd->bssid, 0, ETH_ALEN);
- /* remove AP and TDLS peers */
- sta_info_flush(local, sdata);
- /* finally reset all BSS / config parameters */
- changed |= ieee80211_reset_erp_info(sdata);
- ieee80211_led_assoc(local, 0);
- changed |= BSS_CHANGED_ASSOC;
- sdata->vif.bss_conf.assoc = false;
- /* on the next assoc, re-program HT parameters */
- sdata->ht_opmode_valid = false;
- memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
- memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
- local->power_constr_level = 0;
- del_timer_sync(&local->dynamic_ps_timer);
- cancel_work_sync(&local->dynamic_ps_enable_work);
- if (local->hw.conf.flags & IEEE80211_CONF_PS) {
- local->hw.conf.flags &= ~IEEE80211_CONF_PS;
- ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
- }
- local->ps_sdata = NULL;
- /* Disable ARP filtering */
- if (sdata->vif.bss_conf.arp_filter_enabled) {
- sdata->vif.bss_conf.arp_filter_enabled = false;
- changed |= BSS_CHANGED_ARP_FILTER;
- }
- sdata->vif.bss_conf.qos = false;
- changed |= BSS_CHANGED_QOS;
- /* The BSSID (not really interesting) and HT changed */
- changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
- ieee80211_bss_info_change_notify(sdata, changed);
- /* channel(_type) changes are handled by ieee80211_hw_config */
- WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
- ieee80211_hw_config(local, 0);
- /* disassociated - set to defaults now */
- ieee80211_set_wmm_default(sdata, false);
- del_timer_sync(&sdata->u.mgd.conn_mon_timer);
- del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
- del_timer_sync(&sdata->u.mgd.timer);
- del_timer_sync(&sdata->u.mgd.chswitch_timer);
- }
- void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_hdr *hdr)
- {
- /*
- * We can postpone the mgd.timer whenever receiving unicast frames
- * from AP because we know that the connection is working both ways
- * at that time. But multicast frames (and hence also beacons) must
- * be ignored here, because we need to trigger the timer during
- * data idle periods for sending the periodic probe request to the
- * AP we're connected to.
- */
- if (is_multicast_ether_addr(hdr->addr1))
- return;
- ieee80211_sta_reset_conn_monitor(sdata);
- }
- static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
- IEEE80211_STA_CONNECTION_POLL)))
- return;
- ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
- IEEE80211_STA_BEACON_POLL);
- mutex_lock(&sdata->local->iflist_mtx);
- ieee80211_recalc_ps(sdata->local, -1);
- mutex_unlock(&sdata->local->iflist_mtx);
- if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
- return;
- /*
- * We've received a probe response, but are not sure whether
- * we have or will be receiving any beacons or data, so let's
- * schedule the timers again, just in case.
- */
- ieee80211_sta_reset_beacon_monitor(sdata);
- mod_timer(&ifmgd->conn_mon_timer,
- round_jiffies_up(jiffies +
- IEEE80211_CONNECTION_IDLE_TIME));
- }
- void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_hdr *hdr, bool ack)
- {
- if (!ieee80211_is_data(hdr->frame_control))
- return;
- if (ack)
- ieee80211_sta_reset_conn_monitor(sdata);
- if (ieee80211_is_nullfunc(hdr->frame_control) &&
- sdata->u.mgd.probe_send_count > 0) {
- if (ack)
- sdata->u.mgd.probe_send_count = 0;
- else
- sdata->u.mgd.nullfunc_failed = true;
- ieee80211_queue_work(&sdata->local->hw, &sdata->work);
- }
- }
- static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- const u8 *ssid;
- u8 *dst = ifmgd->associated->bssid;
- u8 unicast_limit = max(1, max_probe_tries - 3);
- /*
- * Try sending broadcast probe requests for the last three
- * probe requests after the first ones failed since some
- * buggy APs only support broadcast probe requests.
- */
- if (ifmgd->probe_send_count >= unicast_limit)
- dst = NULL;
- /*
- * When the hardware reports an accurate Tx ACK status, it's
- * better to send a nullfunc frame instead of a probe request,
- * as it will kick us off the AP quickly if we aren't associated
- * anymore. The timeout will be reset if the frame is ACKed by
- * the AP.
- */
- if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
- ifmgd->nullfunc_failed = false;
- ieee80211_send_nullfunc(sdata->local, sdata, 0);
- } else {
- ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
- ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
- (u32) -1, true, false);
- }
- ifmgd->probe_send_count++;
- ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
- run_again(ifmgd, ifmgd->probe_timeout);
- }
- static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
- bool beacon)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- bool already = false;
- if (!ieee80211_sdata_running(sdata))
- return;
- if (sdata->local->scanning)
- return;
- if (sdata->local->tmp_channel)
- return;
- mutex_lock(&ifmgd->mtx);
- if (!ifmgd->associated)
- goto out;
- #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- if (beacon && net_ratelimit())
- printk(KERN_DEBUG "%s: detected beacon loss from AP "
- "- sending probe request\n", sdata->name);
- #endif
- /*
- * The driver/our work has already reported this event or the
- * connection monitoring has kicked in and we have already sent
- * a probe request. Or maybe the AP died and the driver keeps
- * reporting until we disassociate...
- *
- * In either case we have to ignore the current call to this
- * function (except for setting the correct probe reason bit)
- * because otherwise we would reset the timer every time and
- * never check whether we received a probe response!
- */
- if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
- IEEE80211_STA_CONNECTION_POLL))
- already = true;
- if (beacon)
- ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
- else
- ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
- if (already)
- goto out;
- mutex_lock(&sdata->local->iflist_mtx);
- ieee80211_recalc_ps(sdata->local, -1);
- mutex_unlock(&sdata->local->iflist_mtx);
- ifmgd->probe_send_count = 0;
- ieee80211_mgd_probe_ap_send(sdata);
- out:
- mutex_unlock(&ifmgd->mtx);
- }
- struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
- struct ieee80211_vif *vif)
- {
- struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct sk_buff *skb;
- const u8 *ssid;
- if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
- return NULL;
- ASSERT_MGD_MTX(ifmgd);
- if (!ifmgd->associated)
- return NULL;
- ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
- skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
- (u32) -1, ssid + 2, ssid[1],
- NULL, 0, true);
- return skb;
- }
- EXPORT_SYMBOL(ieee80211_ap_probereq_get);
- static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_local *local = sdata->local;
- u8 bssid[ETH_ALEN];
- u8 frame_buf[DEAUTH_DISASSOC_LEN];
- mutex_lock(&ifmgd->mtx);
- if (!ifmgd->associated) {
- mutex_unlock(&ifmgd->mtx);
- return;
- }
- memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
- printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
- sdata->name, bssid);
- ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
- WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
- false, frame_buf);
- mutex_unlock(&ifmgd->mtx);
- /*
- * must be outside lock due to cfg80211,
- * but that's not a problem.
- */
- cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
- mutex_lock(&local->mtx);
- ieee80211_recalc_idle(local);
- mutex_unlock(&local->mtx);
- }
- void ieee80211_beacon_connection_loss_work(struct work_struct *work)
- {
- struct ieee80211_sub_if_data *sdata =
- container_of(work, struct ieee80211_sub_if_data,
- u.mgd.beacon_connection_loss_work);
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct sta_info *sta;
- if (ifmgd->associated) {
- rcu_read_lock();
- sta = sta_info_get(sdata, ifmgd->bssid);
- if (sta)
- sta->beacon_loss_count++;
- rcu_read_unlock();
- }
- if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
- __ieee80211_connection_loss(sdata);
- else
- ieee80211_mgd_probe_ap(sdata, true);
- }
- void ieee80211_beacon_loss(struct ieee80211_vif *vif)
- {
- struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
- struct ieee80211_hw *hw = &sdata->local->hw;
- trace_api_beacon_loss(sdata);
- WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
- ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
- }
- EXPORT_SYMBOL(ieee80211_beacon_loss);
- void ieee80211_connection_loss(struct ieee80211_vif *vif)
- {
- struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
- struct ieee80211_hw *hw = &sdata->local->hw;
- trace_api_connection_loss(sdata);
- WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
- ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
- }
- EXPORT_SYMBOL(ieee80211_connection_loss);
- static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
- bool assoc)
- {
- struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
- lockdep_assert_held(&sdata->u.mgd.mtx);
- if (!assoc) {
- sta_info_destroy_addr(sdata, auth_data->bss->bssid);
- memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
- ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
- }
- cfg80211_put_bss(auth_data->bss);
- kfree(auth_data);
- sdata->u.mgd.auth_data = NULL;
- }
- static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_mgmt *mgmt, size_t len)
- {
- struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
- u8 *pos;
- struct ieee802_11_elems elems;
- pos = mgmt->u.auth.variable;
- ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
- if (!elems.challenge)
- return;
- auth_data->expected_transaction = 4;
- ieee80211_send_auth(sdata, 3, auth_data->algorithm,
- elems.challenge - 2, elems.challenge_len + 2,
- auth_data->bss->bssid, auth_data->bss->bssid,
- auth_data->key, auth_data->key_len,
- auth_data->key_idx);
- }
- static enum rx_mgmt_action __must_check
- ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_mgmt *mgmt, size_t len)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- u8 bssid[ETH_ALEN];
- u16 auth_alg, auth_transaction, status_code;
- struct sta_info *sta;
- lockdep_assert_held(&ifmgd->mtx);
- if (len < 24 + 6)
- return RX_MGMT_NONE;
- if (!ifmgd->auth_data || ifmgd->auth_data->done)
- return RX_MGMT_NONE;
- memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
- if (compare_ether_addr(bssid, mgmt->bssid))
- return RX_MGMT_NONE;
- auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
- auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
- status_code = le16_to_cpu(mgmt->u.auth.status_code);
- if (auth_alg != ifmgd->auth_data->algorithm ||
- auth_transaction != ifmgd->auth_data->expected_transaction)
- return RX_MGMT_NONE;
- if (status_code != WLAN_STATUS_SUCCESS) {
- printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
- sdata->name, mgmt->sa, status_code);
- ieee80211_destroy_auth_data(sdata, false);
- return RX_MGMT_CFG80211_RX_AUTH;
- }
- switch (ifmgd->auth_data->algorithm) {
- case WLAN_AUTH_OPEN:
- case WLAN_AUTH_LEAP:
- case WLAN_AUTH_FT:
- break;
- case WLAN_AUTH_SHARED_KEY:
- if (ifmgd->auth_data->expected_transaction != 4) {
- ieee80211_auth_challenge(sdata, mgmt, len);
- /* need another frame */
- return RX_MGMT_NONE;
- }
- break;
- default:
- WARN_ONCE(1, "invalid auth alg %d",
- ifmgd->auth_data->algorithm);
- return RX_MGMT_NONE;
- }
- printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
- ifmgd->auth_data->done = true;
- ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
- run_again(ifmgd, ifmgd->auth_data->timeout);
- /* move station state to auth */
- mutex_lock(&sdata->local->sta_mtx);
- sta = sta_info_get(sdata, bssid);
- if (!sta) {
- WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
- goto out_err;
- }
- if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
- printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
- sdata->name, bssid);
- goto out_err;
- }
- mutex_unlock(&sdata->local->sta_mtx);
- return RX_MGMT_CFG80211_RX_AUTH;
- out_err:
- mutex_unlock(&sdata->local->sta_mtx);
- /* ignore frame -- wait for timeout */
- return RX_MGMT_NONE;
- }
- static enum rx_mgmt_action __must_check
- ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_mgmt *mgmt, size_t len)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- const u8 *bssid = NULL;
- u16 reason_code;
- lockdep_assert_held(&ifmgd->mtx);
- if (len < 24 + 2)
- return RX_MGMT_NONE;
- if (!ifmgd->associated ||
- compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
- return RX_MGMT_NONE;
- bssid = ifmgd->associated->bssid;
- reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
- printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
- sdata->name, bssid, reason_code);
- ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
- mutex_lock(&sdata->local->mtx);
- ieee80211_recalc_idle(sdata->local);
- mutex_unlock(&sdata->local->mtx);
- return RX_MGMT_CFG80211_DEAUTH;
- }
- static enum rx_mgmt_action __must_check
- ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_mgmt *mgmt, size_t len)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- u16 reason_code;
- lockdep_assert_held(&ifmgd->mtx);
- if (len < 24 + 2)
- return RX_MGMT_NONE;
- if (!ifmgd->associated ||
- compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
- return RX_MGMT_NONE;
- reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
- printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
- sdata->name, mgmt->sa, reason_code);
- ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
- mutex_lock(&sdata->local->mtx);
- ieee80211_recalc_idle(sdata->local);
- mutex_unlock(&sdata->local->mtx);
- return RX_MGMT_CFG80211_DISASSOC;
- }
- static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
- u8 *supp_rates, unsigned int supp_rates_len,
- u32 *rates, u32 *basic_rates,
- bool *have_higher_than_11mbit,
- int *min_rate, int *min_rate_index)
- {
- int i, j;
- for (i = 0; i < supp_rates_len; i++) {
- int rate = (supp_rates[i] & 0x7f) * 5;
- bool is_basic = !!(supp_rates[i] & 0x80);
- if (rate > 110)
- *have_higher_than_11mbit = true;
- /*
- * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
- * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
- *
- * Note: Even through the membership selector and the basic
- * rate flag share the same bit, they are not exactly
- * the same.
- */
- if (!!(supp_rates[i] & 0x80) &&
- (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
- continue;
- for (j = 0; j < sband->n_bitrates; j++) {
- if (sband->bitrates[j].bitrate == rate) {
- *rates |= BIT(j);
- if (is_basic)
- *basic_rates |= BIT(j);
- if (rate < *min_rate) {
- *min_rate = rate;
- *min_rate_index = j;
- }
- break;
- }
- }
- }
- }
- static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
- bool assoc)
- {
- struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
- lockdep_assert_held(&sdata->u.mgd.mtx);
- if (!assoc) {
- sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
- memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
- ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
- }
- kfree(assoc_data);
- sdata->u.mgd.assoc_data = NULL;
- }
- static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
- struct cfg80211_bss *cbss,
- struct ieee80211_mgmt *mgmt, size_t len)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_supported_band *sband;
- struct sta_info *sta;
- u8 *pos;
- u16 capab_info, aid;
- struct ieee802_11_elems elems;
- struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
- u32 changed = 0;
- int err;
- u16 ap_ht_cap_flags;
- /* AssocResp and ReassocResp have identical structure */
- aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
- capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
- if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
- printk(KERN_DEBUG
- "%s: invalid AID value 0x%x; bits 15:14 not set\n",
- sdata->name, aid);
- aid &= ~(BIT(15) | BIT(14));
- ifmgd->broken_ap = false;
- if (aid == 0 || aid > IEEE80211_MAX_AID) {
- printk(KERN_DEBUG
- "%s: invalid AID value %d (out of range), turn off PS\n",
- sdata->name, aid);
- aid = 0;
- ifmgd->broken_ap = true;
- }
- pos = mgmt->u.assoc_resp.variable;
- ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
- if (!elems.supp_rates) {
- printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
- sdata->name);
- return false;
- }
- ifmgd->aid = aid;
- mutex_lock(&sdata->local->sta_mtx);
- /*
- * station info was already allocated and inserted before
- * the association and should be available to us
- */
- sta = sta_info_get(sdata, cbss->bssid);
- if (WARN_ON(!sta)) {
- mutex_unlock(&sdata->local->sta_mtx);
- return false;
- }
- sband = local->hw.wiphy->bands[local->oper_channel->band];
- if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
- ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
- elems.ht_cap_elem, &sta->sta.ht_cap);
- ap_ht_cap_flags = sta->sta.ht_cap.cap;
- rate_control_rate_init(sta);
- if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
- set_sta_flag(sta, WLAN_STA_MFP);
- if (elems.wmm_param)
- set_sta_flag(sta, WLAN_STA_WME);
- err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
- if (!err)
- err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
- if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
- err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
- if (err) {
- printk(KERN_DEBUG
- "%s: failed to move station %pM to desired state\n",
- sdata->name, sta->sta.addr);
- WARN_ON(__sta_info_destroy(sta));
- mutex_unlock(&sdata->local->sta_mtx);
- return false;
- }
- mutex_unlock(&sdata->local->sta_mtx);
- /*
- * Always handle WMM once after association regardless
- * of the first value the AP uses. Setting -1 here has
- * that effect because the AP values is an unsigned
- * 4-bit value.
- */
- ifmgd->wmm_last_param_set = -1;
- if (elems.wmm_param)
- ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
- elems.wmm_param_len);
- else
- ieee80211_set_wmm_default(sdata, false);
- changed |= BSS_CHANGED_QOS;
- if (elems.ht_info_elem && elems.wmm_param &&
- !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
- changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
- cbss->bssid, ap_ht_cap_flags,
- false);
- /* set AID and assoc capability,
- * ieee80211_set_associated() will tell the driver */
- bss_conf->aid = aid;
- bss_conf->assoc_capability = capab_info;
- ieee80211_set_associated(sdata, cbss, changed);
- /*
- * If we're using 4-addr mode, let the AP know that we're
- * doing so, so that it can create the STA VLAN on its side
- */
- if (ifmgd->use_4addr)
- ieee80211_send_4addr_nullfunc(local, sdata);
- /*
- * Start timer to probe the connection to the AP now.
- * Also start the timer that will detect beacon loss.
- */
- ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
- ieee80211_sta_reset_beacon_monitor(sdata);
- return true;
- }
- static enum rx_mgmt_action __must_check
- ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_mgmt *mgmt, size_t len,
- struct cfg80211_bss **bss)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
- u16 capab_info, status_code, aid;
- struct ieee802_11_elems elems;
- u8 *pos;
- bool reassoc;
- lockdep_assert_held(&ifmgd->mtx);
- if (!assoc_data)
- return RX_MGMT_NONE;
- if (compare_ether_addr(assoc_data->bss->bssid, mgmt->bssid))
- return RX_MGMT_NONE;
- /*
- * AssocResp and ReassocResp have identical structure, so process both
- * of them in this function.
- */
- if (len < 24 + 6)
- return RX_MGMT_NONE;
- reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
- capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
- status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
- aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
- printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
- "status=%d aid=%d)\n",
- sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
- capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
- pos = mgmt->u.assoc_resp.variable;
- ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
- if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
- elems.timeout_int && elems.timeout_int_len == 5 &&
- elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
- u32 tu, ms;
- tu = get_unaligned_le32(elems.timeout_int + 1);
- ms = tu * 1024 / 1000;
- printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
- "comeback duration %u TU (%u ms)\n",
- sdata->name, mgmt->sa, tu, ms);
- assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
- if (ms > IEEE80211_ASSOC_TIMEOUT)
- run_again(ifmgd, assoc_data->timeout);
- return RX_MGMT_NONE;
- }
- *bss = assoc_data->bss;
- if (status_code != WLAN_STATUS_SUCCESS) {
- printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
- sdata->name, mgmt->sa, status_code);
- ieee80211_destroy_assoc_data(sdata, false);
- } else {
- if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
- /* oops -- internal error -- send timeout for now */
- ieee80211_destroy_assoc_data(sdata, false);
- cfg80211_put_bss(*bss);
- return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
- }
- printk(KERN_DEBUG "%s: associated\n", sdata->name);
- /*
- * destroy assoc_data afterwards, as otherwise an idle
- * recalc after assoc_data is NULL but before associated
- * is set can cause the interface to go idle
- */
- ieee80211_destroy_assoc_data(sdata, true);
- }
- return RX_MGMT_CFG80211_RX_ASSOC;
- }
- static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_mgmt *mgmt,
- size_t len,
- struct ieee80211_rx_status *rx_status,
- struct ieee802_11_elems *elems,
- bool beacon)
- {
- struct ieee80211_local *local = sdata->local;
- int freq;
- struct ieee80211_bss *bss;
- struct ieee80211_channel *channel;
- bool need_ps = false;
- if (sdata->u.mgd.associated &&
- compare_ether_addr(mgmt->bssid, sdata->u.mgd.associated->bssid)
- == 0) {
- bss = (void *)sdata->u.mgd.associated->priv;
- /* not previously set so we may need to recalc */
- need_ps = !bss->dtim_period;
- }
- if (elems->ds_params && elems->ds_params_len == 1)
- freq = ieee80211_channel_to_frequency(elems->ds_params[0],
- rx_status->band);
- else
- freq = rx_status->freq;
- channel = ieee80211_get_channel(local->hw.wiphy, freq);
- if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
- return;
- bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
- channel, beacon);
- if (bss)
- ieee80211_rx_bss_put(local, bss);
- if (!sdata->u.mgd.associated)
- return;
- if (need_ps) {
- mutex_lock(&local->iflist_mtx);
- ieee80211_recalc_ps(local, -1);
- mutex_unlock(&local->iflist_mtx);
- }
- if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
- (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
- ETH_ALEN) == 0)) {
- struct ieee80211_channel_sw_ie *sw_elem =
- (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
- ieee80211_sta_process_chanswitch(sdata, sw_elem,
- bss, rx_status->mactime);
- }
- }
- static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
- struct sk_buff *skb)
- {
- struct ieee80211_mgmt *mgmt = (void *)skb->data;
- struct ieee80211_if_managed *ifmgd;
- struct ieee80211_rx_status *rx_status = (void *) skb->cb;
- size_t baselen, len = skb->len;
- struct ieee802_11_elems elems;
- ifmgd = &sdata->u.mgd;
- ASSERT_MGD_MTX(ifmgd);
- if (compare_ether_addr(mgmt->da, sdata->vif.addr))
- return; /* ignore ProbeResp to foreign address */
- baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
- if (baselen > len)
- return;
- ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
- &elems);
- ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
- if (ifmgd->associated &&
- compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid) == 0)
- ieee80211_reset_ap_probe(sdata);
- if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
- compare_ether_addr(mgmt->bssid, ifmgd->auth_data->bss->bssid)
- == 0) {
- /* got probe response, continue with auth */
- printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
- ifmgd->auth_data->tries = 0;
- ifmgd->auth_data->timeout = jiffies;
- run_again(ifmgd, ifmgd->auth_data->timeout);
- }
- }
- /*
- * This is the canonical list of information elements we care about,
- * the filter code also gives us all changes to the Microsoft OUI
- * (00:50:F2) vendor IE which is used for WMM which we need to track.
- *
- * We implement beacon filtering in software since that means we can
- * avoid processing the frame here and in cfg80211, and userspace
- * will not be able to tell whether the hardware supports it or not.
- *
- * XXX: This list needs to be dynamic -- userspace needs to be able to
- * add items it requires. It also needs to be able to tell us to
- * look out for other vendor IEs.
- */
- static const u64 care_about_ies =
- (1ULL << WLAN_EID_COUNTRY) |
- (1ULL << WLAN_EID_ERP_INFO) |
- (1ULL << WLAN_EID_CHANNEL_SWITCH) |
- (1ULL << WLAN_EID_PWR_CONSTRAINT) |
- (1ULL << WLAN_EID_HT_CAPABILITY) |
- (1ULL << WLAN_EID_HT_INFORMATION);
- static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_mgmt *mgmt,
- size_t len,
- struct ieee80211_rx_status *rx_status)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
- size_t baselen;
- struct ieee802_11_elems elems;
- struct ieee80211_local *local = sdata->local;
- u32 changed = 0;
- bool erp_valid, directed_tim = false;
- u8 erp_value = 0;
- u32 ncrc;
- u8 *bssid;
- lockdep_assert_held(&ifmgd->mtx);
- /* Process beacon from the current BSS */
- baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
- if (baselen > len)
- return;
- if (rx_status->freq != local->hw.conf.channel->center_freq)
- return;
- if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
- compare_ether_addr(mgmt->bssid, ifmgd->assoc_data->bss->bssid)
- == 0) {
- ieee802_11_parse_elems(mgmt->u.beacon.variable,
- len - baselen, &elems);
- ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
- false);
- ifmgd->assoc_data->have_beacon = true;
- ifmgd->assoc_data->sent_assoc = false;
- /* continue assoc process */
- ifmgd->assoc_data->timeout = jiffies;
- run_again(ifmgd, ifmgd->assoc_data->timeout);
- return;
- }
- if (!ifmgd->associated ||
- compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
- return;
- bssid = ifmgd->associated->bssid;
- /* Track average RSSI from the Beacon frames of the current AP */
- ifmgd->last_beacon_signal = rx_status->signal;
- if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
- ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
- ifmgd->ave_beacon_signal = rx_status->signal * 16;
- ifmgd->last_cqm_event_signal = 0;
- ifmgd->count_beacon_signal = 1;
- ifmgd->last_ave_beacon_signal = 0;
- } else {
- ifmgd->ave_beacon_signal =
- (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
- (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
- ifmgd->ave_beacon_signal) / 16;
- ifmgd->count_beacon_signal++;
- }
- if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
- ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
- int sig = ifmgd->ave_beacon_signal / 16;
- int last_sig = ifmgd->last_ave_beacon_signal;
- /*
- * if signal crosses either of the boundaries, invoke callback
- * with appropriate parameters
- */
- if (sig > ifmgd->rssi_max_thold &&
- (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
- ifmgd->last_ave_beacon_signal = sig;
- drv_rssi_callback(local, RSSI_EVENT_HIGH);
- } else if (sig < ifmgd->rssi_min_thold &&
- (last_sig >= ifmgd->rssi_max_thold ||
- last_sig == 0)) {
- ifmgd->last_ave_beacon_signal = sig;
- drv_rssi_callback(local, RSSI_EVENT_LOW);
- }
- }
- if (bss_conf->cqm_rssi_thold &&
- ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
- !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
- int sig = ifmgd->ave_beacon_signal / 16;
- int last_event = ifmgd->last_cqm_event_signal;
- int thold = bss_conf->cqm_rssi_thold;
- int hyst = bss_conf->cqm_rssi_hyst;
- if (sig < thold &&
- (last_event == 0 || sig < last_event - hyst)) {
- ifmgd->last_cqm_event_signal = sig;
- ieee80211_cqm_rssi_notify(
- &sdata->vif,
- NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
- GFP_KERNEL);
- } else if (sig > thold &&
- (last_event == 0 || sig > last_event + hyst)) {
- ifmgd->last_cqm_event_signal = sig;
- ieee80211_cqm_rssi_notify(
- &sdata->vif,
- NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
- GFP_KERNEL);
- }
- }
- if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
- #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: cancelling probereq poll due "
- "to a received beacon\n", sdata->name);
- }
- #endif
- ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
- mutex_lock(&local->iflist_mtx);
- ieee80211_recalc_ps(local, -1);
- mutex_unlock(&local->iflist_mtx);
- }
- /*
- * Push the beacon loss detection into the future since
- * we are processing a beacon from the AP just now.
- */
- ieee80211_sta_reset_beacon_monitor(sdata);
- ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
- ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
- len - baselen, &elems,
- care_about_ies, ncrc);
- if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
- directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
- ifmgd->aid);
- if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
- ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
- true);
- ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
- elems.wmm_param_len);
- }
- if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
- if (directed_tim) {
- if (local->hw.conf.dynamic_ps_timeout > 0) {
- local->hw.conf.flags &= ~IEEE80211_CONF_PS;
- ieee80211_hw_config(local,
- IEEE80211_CONF_CHANGE_PS);
- ieee80211_send_nullfunc(local, sdata, 0);
- } else {
- local->pspolling = true;
- /*
- * Here is assumed that the driver will be
- * able to send ps-poll frame and receive a
- * response even though power save mode is
- * enabled, but some drivers might require
- * to disable power save here. This needs
- * to be investigated.
- */
- ieee80211_send_pspoll(local, sdata);
- }
- }
- }
- if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
- return;
- ifmgd->beacon_crc = ncrc;
- ifmgd->beacon_crc_valid = true;
- if (elems.erp_info && elems.erp_info_len >= 1) {
- erp_valid = true;
- erp_value = elems.erp_info[0];
- } else {
- erp_valid = false;
- }
- changed |= ieee80211_handle_bss_capability(sdata,
- le16_to_cpu(mgmt->u.beacon.capab_info),
- erp_valid, erp_value);
- if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
- !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
- struct sta_info *sta;
- struct ieee80211_supported_band *sband;
- u16 ap_ht_cap_flags;
- rcu_read_lock();
- sta = sta_info_get(sdata, bssid);
- if (WARN_ON(!sta)) {
- rcu_read_unlock();
- return;
- }
- sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
- ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
- elems.ht_cap_elem, &sta->sta.ht_cap);
- ap_ht_cap_flags = sta->sta.ht_cap.cap;
- rcu_read_unlock();
- changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
- bssid, ap_ht_cap_flags, true);
- }
- /* Note: country IE parsing is done for us by cfg80211 */
- if (elems.country_elem) {
- /* TODO: IBSS also needs this */
- if (elems.pwr_constr_elem)
- ieee80211_handle_pwr_constr(sdata,
- le16_to_cpu(mgmt->u.probe_resp.capab_info),
- elems.pwr_constr_elem,
- elems.pwr_constr_elem_len);
- }
- ieee80211_bss_info_change_notify(sdata, changed);
- }
- void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
- struct sk_buff *skb)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_rx_status *rx_status;
- struct ieee80211_mgmt *mgmt;
- struct cfg80211_bss *bss = NULL;
- enum rx_mgmt_action rma = RX_MGMT_NONE;
- u16 fc;
- rx_status = (struct ieee80211_rx_status *) skb->cb;
- mgmt = (struct ieee80211_mgmt *) skb->data;
- fc = le16_to_cpu(mgmt->frame_control);
- mutex_lock(&ifmgd->mtx);
- switch (fc & IEEE80211_FCTL_STYPE) {
- case IEEE80211_STYPE_BEACON:
- ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
- break;
- case IEEE80211_STYPE_PROBE_RESP:
- ieee80211_rx_mgmt_probe_resp(sdata, skb);
- break;
- case IEEE80211_STYPE_AUTH:
- rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
- break;
- case IEEE80211_STYPE_DEAUTH:
- rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
- break;
- case IEEE80211_STYPE_DISASSOC:
- rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
- break;
- case IEEE80211_STYPE_ASSOC_RESP:
- case IEEE80211_STYPE_REASSOC_RESP:
- rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
- break;
- case IEEE80211_STYPE_ACTION:
- switch (mgmt->u.action.category) {
- case WLAN_CATEGORY_SPECTRUM_MGMT:
- ieee80211_sta_process_chanswitch(sdata,
- &mgmt->u.action.u.chan_switch.sw_elem,
- (void *)ifmgd->associated->priv,
- rx_status->mactime);
- break;
- }
- }
- mutex_unlock(&ifmgd->mtx);
- switch (rma) {
- case RX_MGMT_NONE:
- /* no action */
- break;
- case RX_MGMT_CFG80211_DEAUTH:
- cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
- break;
- case RX_MGMT_CFG80211_DISASSOC:
- cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
- break;
- case RX_MGMT_CFG80211_RX_AUTH:
- cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
- break;
- case RX_MGMT_CFG80211_RX_ASSOC:
- cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
- break;
- case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
- cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
- break;
- default:
- WARN(1, "unexpected: %d", rma);
- }
- }
- static void ieee80211_sta_timer(unsigned long data)
- {
- struct ieee80211_sub_if_data *sdata =
- (struct ieee80211_sub_if_data *) data;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_local *local = sdata->local;
- if (local->quiescing) {
- set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
- return;
- }
- ieee80211_queue_work(&local->hw, &sdata->work);
- }
- static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
- u8 *bssid, u8 reason)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- u8 frame_buf[DEAUTH_DISASSOC_LEN];
- ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
- IEEE80211_STA_BEACON_POLL);
- ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
- false, frame_buf);
- mutex_unlock(&ifmgd->mtx);
- /*
- * must be outside lock due to cfg80211,
- * but that's not a problem.
- */
- cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
- mutex_lock(&local->mtx);
- ieee80211_recalc_idle(local);
- mutex_unlock(&local->mtx);
- mutex_lock(&ifmgd->mtx);
- }
- static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
- lockdep_assert_held(&ifmgd->mtx);
- if (WARN_ON_ONCE(!auth_data))
- return -EINVAL;
- auth_data->tries++;
- if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
- printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
- sdata->name, auth_data->bss->bssid);
- /*
- * Most likely AP is not in the range so remove the
- * bss struct for that AP.
- */
- cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
- return -ETIMEDOUT;
- }
- if (auth_data->bss->proberesp_ies) {
- printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
- sdata->name, auth_data->bss->bssid, auth_data->tries,
- IEEE80211_AUTH_MAX_TRIES);
- auth_data->expected_transaction = 2;
- ieee80211_send_auth(sdata, 1, auth_data->algorithm,
- auth_data->ie, auth_data->ie_len,
- auth_data->bss->bssid,
- auth_data->bss->bssid, NULL, 0, 0);
- } else {
- const u8 *ssidie;
- printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
- sdata->name, auth_data->bss->bssid, auth_data->tries,
- IEEE80211_AUTH_MAX_TRIES);
- ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
- if (!ssidie)
- return -EINVAL;
- /*
- * Direct probe is sent to broadcast address as some APs
- * will not answer to direct packet in unassociated state.
- */
- ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
- NULL, 0, (u32) -1, true, false);
- }
- auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
- run_again(ifmgd, auth_data->timeout);
- return 0;
- }
- static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
- struct ieee80211_local *local = sdata->local;
- lockdep_assert_held(&sdata->u.mgd.mtx);
- assoc_data->tries++;
- if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
- printk(KERN_DEBUG "%s: association with %pM timed out\n",
- sdata->name, assoc_data->bss->bssid);
- /*
- * Most likely AP is not in the range so remove the
- * bss struct for that AP.
- */
- cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
- return -ETIMEDOUT;
- }
- printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
- sdata->name, assoc_data->bss->bssid, assoc_data->tries,
- IEEE80211_ASSOC_MAX_TRIES);
- ieee80211_send_assoc(sdata);
- assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
- run_again(&sdata->u.mgd, assoc_data->timeout);
- return 0;
- }
- void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- mutex_lock(&ifmgd->mtx);
- if (ifmgd->auth_data &&
- time_after(jiffies, ifmgd->auth_data->timeout)) {
- if (ifmgd->auth_data->done) {
- /*
- * ok ... we waited for assoc but userspace didn't,
- * so let's just kill the auth data
- */
- ieee80211_destroy_auth_data(sdata, false);
- } else if (ieee80211_probe_auth(sdata)) {
- u8 bssid[ETH_ALEN];
- memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
- ieee80211_destroy_auth_data(sdata, false);
- mutex_unlock(&ifmgd->mtx);
- cfg80211_send_auth_timeout(sdata->dev, bssid);
- mutex_lock(&ifmgd->mtx);
- }
- } else if (ifmgd->auth_data)
- run_again(ifmgd, ifmgd->auth_data->timeout);
- if (ifmgd->assoc_data &&
- time_after(jiffies, ifmgd->assoc_data->timeout)) {
- if (!ifmgd->assoc_data->have_beacon ||
- ieee80211_do_assoc(sdata)) {
- u8 bssid[ETH_ALEN];
- memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
- ieee80211_destroy_assoc_data(sdata, false);
- mutex_unlock(&ifmgd->mtx);
- cfg80211_send_assoc_timeout(sdata->dev, bssid);
- mutex_lock(&ifmgd->mtx);
- }
- } else if (ifmgd->assoc_data)
- run_again(ifmgd, ifmgd->assoc_data->timeout);
- if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
- IEEE80211_STA_CONNECTION_POLL) &&
- ifmgd->associated) {
- u8 bssid[ETH_ALEN];
- int max_tries;
- memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
- if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
- max_tries = max_nullfunc_tries;
- else
- max_tries = max_probe_tries;
- /* ACK received for nullfunc probing frame */
- if (!ifmgd->probe_send_count)
- ieee80211_reset_ap_probe(sdata);
- else if (ifmgd->nullfunc_failed) {
- if (ifmgd->probe_send_count < max_tries) {
- #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- wiphy_debug(local->hw.wiphy,
- "%s: No ack for nullfunc frame to"
- " AP %pM, try %d/%i\n",
- sdata->name, bssid,
- ifmgd->probe_send_count, max_tries);
- #endif
- ieee80211_mgd_probe_ap_send(sdata);
- } else {
- #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- wiphy_debug(local->hw.wiphy,
- "%s: No ack for nullfunc frame to"
- " AP %pM, disconnecting.\n",
- sdata->name, bssid);
- #endif
- ieee80211_sta_connection_lost(sdata, bssid,
- WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
- }
- } else if (time_is_after_jiffies(ifmgd->probe_timeout))
- run_again(ifmgd, ifmgd->probe_timeout);
- else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
- #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- wiphy_debug(local->hw.wiphy,
- "%s: Failed to send nullfunc to AP %pM"
- " after %dms, disconnecting.\n",
- sdata->name,
- bssid, probe_wait_ms);
- #endif
- ieee80211_sta_connection_lost(sdata, bssid,
- WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
- } else if (ifmgd->probe_send_count < max_tries) {
- #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- wiphy_debug(local->hw.wiphy,
- "%s: No probe response from AP %pM"
- " after %dms, try %d/%i\n",
- sdata->name,
- bssid, probe_wait_ms,
- ifmgd->probe_send_count, max_tries);
- #endif
- ieee80211_mgd_probe_ap_send(sdata);
- } else {
- /*
- * We actually lost the connection ... or did we?
- * Let's make sure!
- */
- wiphy_debug(local->hw.wiphy,
- "%s: No probe response from AP %pM"
- " after %dms, disconnecting.\n",
- sdata->name,
- bssid, probe_wait_ms);
- ieee80211_sta_connection_lost(sdata, bssid,
- WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
- }
- }
- mutex_unlock(&ifmgd->mtx);
- mutex_lock(&local->mtx);
- ieee80211_recalc_idle(local);
- mutex_unlock(&local->mtx);
- }
- static void ieee80211_sta_bcn_mon_timer(unsigned long data)
- {
- struct ieee80211_sub_if_data *sdata =
- (struct ieee80211_sub_if_data *) data;
- struct ieee80211_local *local = sdata->local;
- if (local->quiescing)
- return;
- ieee80211_queue_work(&sdata->local->hw,
- &sdata->u.mgd.beacon_connection_loss_work);
- }
- static void ieee80211_sta_conn_mon_timer(unsigned long data)
- {
- struct ieee80211_sub_if_data *sdata =
- (struct ieee80211_sub_if_data *) data;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_local *local = sdata->local;
- if (local->quiescing)
- return;
- ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
- }
- static void ieee80211_sta_monitor_work(struct work_struct *work)
- {
- struct ieee80211_sub_if_data *sdata =
- container_of(work, struct ieee80211_sub_if_data,
- u.mgd.monitor_work);
- ieee80211_mgd_probe_ap(sdata, false);
- }
- static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
- {
- u32 flags;
- if (sdata->vif.type == NL80211_IFTYPE_STATION) {
- sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
- IEEE80211_STA_CONNECTION_POLL);
- /* let's probe the connection once */
- flags = sdata->local->hw.flags;
- if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
- ieee80211_queue_work(&sdata->local->hw,
- &sdata->u.mgd.monitor_work);
- /* and do all the other regular work too */
- ieee80211_queue_work(&sdata->local->hw, &sdata->work);
- }
- }
- #ifdef CONFIG_PM
- void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- /*
- * we need to use atomic bitops for the running bits
- * only because both timers might fire at the same
- * time -- the code here is properly synchronised.
- */
- cancel_work_sync(&ifmgd->request_smps_work);
- cancel_work_sync(&ifmgd->monitor_work);
- cancel_work_sync(&ifmgd->beacon_connection_loss_work);
- if (del_timer_sync(&ifmgd->timer))
- set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
- cancel_work_sync(&ifmgd->chswitch_work);
- if (del_timer_sync(&ifmgd->chswitch_timer))
- set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
- /* these will just be re-established on connection */
- del_timer_sync(&ifmgd->conn_mon_timer);
- del_timer_sync(&ifmgd->bcn_mon_timer);
- }
- void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- if (!ifmgd->associated)
- return;
- if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
- sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
- mutex_lock(&ifmgd->mtx);
- if (ifmgd->associated) {
- #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- wiphy_debug(sdata->local->hw.wiphy,
- "%s: driver requested disconnect after resume.\n",
- sdata->name);
- #endif
- ieee80211_sta_connection_lost(sdata,
- ifmgd->associated->bssid,
- WLAN_REASON_UNSPECIFIED);
- mutex_unlock(&ifmgd->mtx);
- return;
- }
- mutex_unlock(&ifmgd->mtx);
- }
- if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
- add_timer(&ifmgd->timer);
- if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
- add_timer(&ifmgd->chswitch_timer);
- ieee80211_sta_reset_beacon_monitor(sdata);
- ieee80211_restart_sta_timer(sdata);
- }
- #endif
- /* interface setup */
- void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_if_managed *ifmgd;
- ifmgd = &sdata->u.mgd;
- INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
- INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
- INIT_WORK(&ifmgd->beacon_connection_loss_work,
- ieee80211_beacon_connection_loss_work);
- INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
- setup_timer(&ifmgd->timer, ieee80211_sta_timer,
- (unsigned long) sdata);
- setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
- (unsigned long) sdata);
- setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
- (unsigned long) sdata);
- setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
- (unsigned long) sdata);
- ifmgd->flags = 0;
- ifmgd->powersave = sdata->wdev.ps;
- ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
- ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
- mutex_init(&ifmgd->mtx);
- if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
- ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
- else
- ifmgd->req_smps = IEEE80211_SMPS_OFF;
- }
- /* scan finished notification */
- void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
- {
- struct ieee80211_sub_if_data *sdata = local->scan_sdata;
- /* Restart STA timers */
- rcu_read_lock();
- list_for_each_entry_rcu(sdata, &local->interfaces, list)
- ieee80211_restart_sta_timer(sdata);
- rcu_read_unlock();
- }
- int ieee80211_max_network_latency(struct notifier_block *nb,
- unsigned long data, void *dummy)
- {
- s32 latency_usec = (s32) data;
- struct ieee80211_local *local =
- container_of(nb, struct ieee80211_local,
- network_latency_notifier);
- mutex_lock(&local->iflist_mtx);
- ieee80211_recalc_ps(local, latency_usec);
- mutex_unlock(&local->iflist_mtx);
- return 0;
- }
- static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
- struct cfg80211_bss *cbss, bool assoc)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_bss *bss = (void *)cbss->priv;
- struct sta_info *sta;
- bool have_sta = false;
- int err;
- if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
- return -EINVAL;
- if (assoc) {
- rcu_read_lock();
- have_sta = sta_info_get(sdata, cbss->bssid);
- rcu_read_unlock();
- }
- if (!have_sta) {
- sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
- if (!sta)
- return -ENOMEM;
- }
- mutex_lock(&local->mtx);
- ieee80211_recalc_idle(sdata->local);
- mutex_unlock(&local->mtx);
- /* switch to the right channel */
- local->oper_channel = cbss->channel;
- ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
- if (!have_sta) {
- struct ieee80211_supported_band *sband;
- u32 rates = 0, basic_rates = 0;
- bool have_higher_than_11mbit;
- int min_rate = INT_MAX, min_rate_index = -1;
- sband = sdata->local->hw.wiphy->bands[cbss->channel->band];
- ieee80211_get_rates(sband, bss->supp_rates,
- bss->supp_rates_len,
- &rates, &basic_rates,
- &have_higher_than_11mbit,
- &min_rate, &min_rate_index);
- /*
- * This used to be a workaround for basic rates missing
- * in the association response frame. Now that we no
- * longer use the basic rates from there, it probably
- * doesn't happen any more, but keep the workaround so
- * in case some *other* APs are buggy in different ways
- * we can connect -- with a warning.
- */
- if (!basic_rates && min_rate_index >= 0) {
- printk(KERN_DEBUG
- "%s: No basic rates, using min rate instead.\n",
- sdata->name);
- basic_rates = BIT(min_rate_index);
- }
- sta->sta.supp_rates[cbss->channel->band] = rates;
- sdata->vif.bss_conf.basic_rates = basic_rates;
- /* cf. IEEE 802.11 9.2.12 */
- if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
- have_higher_than_11mbit)
- sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
- else
- sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
- memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
- /* tell driver about BSSID and basic rates */
- ieee80211_bss_info_change_notify(sdata,
- BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
- if (assoc)
- sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
- err = sta_info_insert(sta);
- sta = NULL;
- if (err) {
- printk(KERN_DEBUG
- "%s: failed to insert STA entry for the AP (error %d)\n",
- sdata->name, err);
- return err;
- }
- } else
- WARN_ON_ONCE(compare_ether_addr(ifmgd->bssid, cbss->bssid));
- return 0;
- }
- /* config hooks */
- int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
- struct cfg80211_auth_request *req)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_mgd_auth_data *auth_data;
- u16 auth_alg;
- int err;
- /* prepare auth data structure */
- switch (req->auth_type) {
- case NL80211_AUTHTYPE_OPEN_SYSTEM:
- auth_alg = WLAN_AUTH_OPEN;
- break;
- case NL80211_AUTHTYPE_SHARED_KEY:
- if (IS_ERR(local->wep_tx_tfm))
- return -EOPNOTSUPP;
- auth_alg = WLAN_AUTH_SHARED_KEY;
- break;
- case NL80211_AUTHTYPE_FT:
- auth_alg = WLAN_AUTH_FT;
- break;
- case NL80211_AUTHTYPE_NETWORK_EAP:
- auth_alg = WLAN_AUTH_LEAP;
- break;
- default:
- return -EOPNOTSUPP;
- }
- auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
- if (!auth_data)
- return -ENOMEM;
- auth_data->bss = req->bss;
- if (req->ie && req->ie_len) {
- memcpy(auth_data->ie, req->ie, req->ie_len);
- auth_data->ie_len = req->ie_len;
- }
- if (req->key && req->key_len) {
- auth_data->key_len = req->key_len;
- auth_data->key_idx = req->key_idx;
- memcpy(auth_data->key, req->key, req->key_len);
- }
- auth_data->algorithm = auth_alg;
- /* try to authenticate/probe */
- mutex_lock(&ifmgd->mtx);
- if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
- ifmgd->assoc_data) {
- err = -EBUSY;
- goto err_free;
- }
- if (ifmgd->auth_data)
- ieee80211_destroy_auth_data(sdata, false);
- /* prep auth_data so we don't go into idle on disassoc */
- ifmgd->auth_data = auth_data;
- if (ifmgd->associated)
- ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
- printk(KERN_DEBUG "%s: authenticate with %pM\n",
- sdata->name, req->bss->bssid);
- err = ieee80211_prep_connection(sdata, req->bss, false);
- if (err)
- goto err_clear;
- err = ieee80211_probe_auth(sdata);
- if (err) {
- sta_info_destroy_addr(sdata, req->bss->bssid);
- goto err_clear;
- }
- /* hold our own reference */
- cfg80211_ref_bss(auth_data->bss);
- err = 0;
- goto out_unlock;
- err_clear:
- memset(ifmgd->bssid, 0, ETH_ALEN);
- ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
- ifmgd->auth_data = NULL;
- err_free:
- kfree(auth_data);
- out_unlock:
- mutex_unlock(&ifmgd->mtx);
- return err;
- }
- int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
- struct cfg80211_assoc_request *req)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_bss *bss = (void *)req->bss->priv;
- struct ieee80211_mgd_assoc_data *assoc_data;
- struct ieee80211_supported_band *sband;
- const u8 *ssidie;
- int i, err;
- ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
- if (!ssidie)
- return -EINVAL;
- assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
- if (!assoc_data)
- return -ENOMEM;
- mutex_lock(&ifmgd->mtx);
- if (ifmgd->associated)
- ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
- if (ifmgd->auth_data && !ifmgd->auth_data->done) {
- err = -EBUSY;
- goto err_free;
- }
- if (ifmgd->assoc_data) {
- err = -EBUSY;
- goto err_free;
- }
- if (ifmgd->auth_data) {
- bool match;
- /* keep sta info, bssid if matching */
- match = compare_ether_addr(ifmgd->bssid, req->bss->bssid) == 0;
- ieee80211_destroy_auth_data(sdata, match);
- }
- /* prepare assoc data */
- ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
- ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
- ifmgd->flags &= ~IEEE80211_STA_DISABLE_VHT;
- ifmgd->beacon_crc_valid = false;
- /*
- * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
- * We still associate in non-HT mode (11a/b/g) if any one of these
- * ciphers is configured as pairwise.
- * We can set this to true for non-11n hardware, that'll be checked
- * separately along with the peer capabilities.
- */
- for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
- if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
- req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
- req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
- ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
- ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
- netdev_info(sdata->dev,
- "disabling HT/VHT due to WEP/TKIP use\n");
- }
- }
- if (req->flags & ASSOC_REQ_DISABLE_HT) {
- ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
- ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
- }
- /* Also disable HT if we don't support it or the AP doesn't use WMM */
- sband = local->hw.wiphy->bands[req->bss->channel->band];
- if (!sband->ht_cap.ht_supported ||
- local->hw.queues < 4 || !bss->wmm_used)
- ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
- /* disable VHT if we don't support it or the AP doesn't use WMM */
- if (!sband->vht_cap.vht_supported ||
- local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
- ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
- netdev_info(sdata->dev,
- "disabling VHT as WMM/QoS is not supported\n");
- }
- memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
- memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
- sizeof(ifmgd->ht_capa_mask));
- if (req->ie && req->ie_len) {
- memcpy(assoc_data->ie, req->ie, req->ie_len);
- assoc_data->ie_len = req->ie_len;
- }
- assoc_data->bss = req->bss;
- if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
- if (ifmgd->powersave)
- ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
- else
- ifmgd->ap_smps = IEEE80211_SMPS_OFF;
- } else
- ifmgd->ap_smps = ifmgd->req_smps;
- assoc_data->capability = req->bss->capability;
- assoc_data->wmm = bss->wmm_used && (local->hw.queues >= 4);
- assoc_data->supp_rates = bss->supp_rates;
- assoc_data->supp_rates_len = bss->supp_rates_len;
- assoc_data->ht_information_ie =
- ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
- if (bss->wmm_used && bss->uapsd_supported &&
- (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
- assoc_data->uapsd = true;
- ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
- } else {
- assoc_data->uapsd = false;
- ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
- }
- memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
- assoc_data->ssid_len = ssidie[1];
- if (req->prev_bssid)
- memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
- if (req->use_mfp) {
- ifmgd->mfp = IEEE80211_MFP_REQUIRED;
- ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
- } else {
- ifmgd->mfp = IEEE80211_MFP_DISABLED;
- ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
- }
- if (req->crypto.control_port)
- ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
- else
- ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
- sdata->control_port_protocol = req->crypto.control_port_ethertype;
- sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
- /* kick off associate process */
- ifmgd->assoc_data = assoc_data;
- err = ieee80211_prep_connection(sdata, req->bss, true);
- if (err)
- goto err_clear;
- if (!bss->dtim_period &&
- sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
- /*
- * Wait up to one beacon interval ...
- * should this be more if we miss one?
- */
- printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
- sdata->name, ifmgd->bssid);
- assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
- } else {
- assoc_data->have_beacon = true;
- assoc_data->sent_assoc = false;
- assoc_data->timeout = jiffies;
- }
- run_again(ifmgd, assoc_data->timeout);
- if (bss->corrupt_data) {
- char *corrupt_type = "data";
- if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
- if (bss->corrupt_data &
- IEEE80211_BSS_CORRUPT_PROBE_RESP)
- corrupt_type = "beacon and probe response";
- else
- corrupt_type = "beacon";
- } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
- corrupt_type = "probe response";
- printk(KERN_DEBUG "%s: associating with AP with corrupt %s\n",
- sdata->name, corrupt_type);
- }
- err = 0;
- goto out;
- err_clear:
- memset(ifmgd->bssid, 0, ETH_ALEN);
- ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
- ifmgd->assoc_data = NULL;
- err_free:
- kfree(assoc_data);
- out:
- mutex_unlock(&ifmgd->mtx);
- return err;
- }
- int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
- struct cfg80211_deauth_request *req)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- u8 frame_buf[DEAUTH_DISASSOC_LEN];
- mutex_lock(&ifmgd->mtx);
- if (ifmgd->auth_data) {
- ieee80211_destroy_auth_data(sdata, false);
- mutex_unlock(&ifmgd->mtx);
- return 0;
- }
- printk(KERN_DEBUG
- "%s: deauthenticating from %pM by local choice (reason=%d)\n",
- sdata->name, req->bssid, req->reason_code);
- if (ifmgd->associated &&
- compare_ether_addr(ifmgd->associated->bssid, req->bssid) == 0)
- ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
- req->reason_code, true, frame_buf);
- else
- ieee80211_send_deauth_disassoc(sdata, req->bssid,
- IEEE80211_STYPE_DEAUTH,
- req->reason_code, true,
- frame_buf);
- mutex_unlock(&ifmgd->mtx);
- __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
- mutex_lock(&sdata->local->mtx);
- ieee80211_recalc_idle(sdata->local);
- mutex_unlock(&sdata->local->mtx);
- return 0;
- }
- int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
- struct cfg80211_disassoc_request *req)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- u8 bssid[ETH_ALEN];
- u8 frame_buf[DEAUTH_DISASSOC_LEN];
- mutex_lock(&ifmgd->mtx);
- /*
- * cfg80211 should catch this ... but it's racy since
- * we can receive a disassoc frame, process it, hand it
- * to cfg80211 while that's in a locked section already
- * trying to tell us that the user wants to disconnect.
- */
- if (ifmgd->associated != req->bss) {
- mutex_unlock(&ifmgd->mtx);
- return -ENOLINK;
- }
- printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
- sdata->name, req->bss->bssid, req->reason_code);
- memcpy(bssid, req->bss->bssid, ETH_ALEN);
- ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
- req->reason_code, !req->local_state_change,
- frame_buf);
- mutex_unlock(&ifmgd->mtx);
- __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
- mutex_lock(&sdata->local->mtx);
- ieee80211_recalc_idle(sdata->local);
- mutex_unlock(&sdata->local->mtx);
- return 0;
- }
- void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- mutex_lock(&ifmgd->mtx);
- if (ifmgd->assoc_data)
- ieee80211_destroy_assoc_data(sdata, false);
- if (ifmgd->auth_data)
- ieee80211_destroy_auth_data(sdata, false);
- del_timer_sync(&ifmgd->timer);
- mutex_unlock(&ifmgd->mtx);
- }
- void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
- enum nl80211_cqm_rssi_threshold_event rssi_event,
- gfp_t gfp)
- {
- struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
- trace_api_cqm_rssi_notify(sdata, rssi_event);
- cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
- }
- EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
- unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
- {
- struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
- return sdata->dev->operstate;
- }
- EXPORT_SYMBOL(ieee80211_get_operstate);
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