| /* |
| * 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 |
| |
| /* |
| * 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; |
| |
| if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
| 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; |
| } |
| |
| static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_ht_operation *ht_oper, |
| const u8 *bssid, bool reconfig) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_supported_band *sband; |
| struct ieee80211_chanctx_conf *chanctx_conf; |
| struct ieee80211_channel *chan; |
| struct sta_info *sta; |
| u32 changed = 0; |
| u16 ht_opmode; |
| bool disable_40 = false; |
| |
| rcu_read_lock(); |
| chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| if (WARN_ON(!chanctx_conf)) { |
| rcu_read_unlock(); |
| return 0; |
| } |
| chan = chanctx_conf->def.chan; |
| rcu_read_unlock(); |
| sband = local->hw.wiphy->bands[chan->band]; |
| |
| switch (sdata->vif.bss_conf.chandef.width) { |
| case NL80211_CHAN_WIDTH_40: |
| if (sdata->vif.bss_conf.chandef.chan->center_freq > |
| sdata->vif.bss_conf.chandef.center_freq1 && |
| chan->flags & IEEE80211_CHAN_NO_HT40PLUS) |
| disable_40 = true; |
| if (sdata->vif.bss_conf.chandef.chan->center_freq < |
| sdata->vif.bss_conf.chandef.center_freq1 && |
| chan->flags & IEEE80211_CHAN_NO_HT40MINUS) |
| disable_40 = true; |
| break; |
| default: |
| break; |
| } |
| |
| /* This can change during the lifetime of the BSS */ |
| if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) |
| disable_40 = true; |
| |
| mutex_lock(&local->sta_mtx); |
| sta = sta_info_get(sdata, bssid); |
| |
| WARN_ON_ONCE(!sta); |
| |
| if (sta && !sta->supports_40mhz) |
| disable_40 = true; |
| |
| if (sta && (!reconfig || |
| (disable_40 != !(sta->sta.ht_cap.cap & |
| IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) { |
| |
| if (disable_40) |
| sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
| else |
| sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
| |
| rate_control_rate_update(local, sband, sta, |
| IEEE80211_RC_BW_CHANGED); |
| } |
| mutex_unlock(&local->sta_mtx); |
| |
| ht_opmode = le16_to_cpu(ht_oper->operation_mode); |
| |
| /* if bss configuration changed store the new one */ |
| if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) { |
| changed |= BSS_CHANGED_HT; |
| sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
| } |
| |
| 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, u8 ap_ht_param, |
| struct ieee80211_supported_band *sband, |
| struct ieee80211_channel *channel, |
| enum ieee80211_smps_mode smps) |
| { |
| 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)); |
| |
| memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); |
| ieee80211_apply_htcap_overrides(sdata, &ht_cap); |
| |
| /* determine capability flags */ |
| cap = ht_cap.cap; |
| |
| switch (ap_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; |
| } |
| |
| /* |
| * If 40 MHz was disabled associate as though we weren't |
| * capable of 40 MHz -- some broken APs will never fall |
| * back to trying to transmit in 20 MHz. |
| */ |
| if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { |
| cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
| cap &= ~IEEE80211_HT_CAP_SGI_40; |
| } |
| |
| /* 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; |
| |
| if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { |
| cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ; |
| cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; |
| } |
| |
| if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { |
| cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; |
| cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; |
| } |
| |
| /* 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; |
| struct ieee80211_chanctx_conf *chanctx_conf; |
| struct ieee80211_channel *chan; |
| u32 rates = 0; |
| |
| lockdep_assert_held(&ifmgd->mtx); |
| |
| rcu_read_lock(); |
| chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| if (WARN_ON(!chanctx_conf)) { |
| rcu_read_unlock(); |
| return; |
| } |
| chan = chanctx_conf->def.chan; |
| rcu_read_unlock(); |
| sband = local->hw.wiphy->bands[chan->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++ = chan->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 (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && |
| !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) |
| ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
| |
| if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) |
| ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, |
| sband, chan, sdata->smps_mode); |
| |
| 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); |
| } |
| |
| drv_mgd_prepare_tx(local, sdata); |
| |
| 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; |
| |
| /* XXX: wait for a beacon first? */ |
| 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 = vif_to_sdata(vif); |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| |
| trace_api_chswitch_done(sdata, success); |
| if (!success) { |
| sdata_info(sdata, |
| "driver channel switch failed, disconnecting\n"); |
| ieee80211_queue_work(&sdata->local->hw, |
| &ifmgd->csa_connection_drop_work); |
| } else { |
| 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); |
| struct ieee80211_chanctx *chanctx; |
| |
| 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) { |
| sdata_info(sdata, |
| "AP %pM switches to unsupported channel (%d MHz), disconnecting\n", |
| ifmgd->associated->bssid, new_freq); |
| ieee80211_queue_work(&sdata->local->hw, |
| &ifmgd->csa_connection_drop_work); |
| return; |
| } |
| |
| ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; |
| |
| if (sdata->local->use_chanctx) { |
| sdata_info(sdata, |
| "not handling channel switch with channel contexts\n"); |
| ieee80211_queue_work(&sdata->local->hw, |
| &ifmgd->csa_connection_drop_work); |
| return; |
| } |
| |
| mutex_lock(&sdata->local->chanctx_mtx); |
| if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) { |
| mutex_unlock(&sdata->local->chanctx_mtx); |
| return; |
| } |
| chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf), |
| struct ieee80211_chanctx, conf); |
| if (chanctx->refcount > 1) { |
| sdata_info(sdata, |
| "channel switch with multiple interfaces on the same channel, disconnecting\n"); |
| ieee80211_queue_work(&sdata->local->hw, |
| &ifmgd->csa_connection_drop_work); |
| mutex_unlock(&sdata->local->chanctx_mtx); |
| return; |
| } |
| mutex_unlock(&sdata->local->chanctx_mtx); |
| |
| sdata->local->csa_channel = new_ch; |
| |
| if (sw_elem->mode) |
| ieee80211_stop_queues_by_reason(&sdata->local->hw, |
| IEEE80211_QUEUE_STOP_REASON_CSA); |
| |
| if (sdata->local->ops->channel_switch) { |
| /* use driver's channel switch callback */ |
| struct ieee80211_channel_switch ch_switch = { |
| .timestamp = timestamp, |
| .block_tx = sw_elem->mode, |
| .channel = new_ch, |
| .count = sw_elem->count, |
| }; |
| |
| 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 |
| mod_timer(&ifmgd->chswitch_timer, |
| TU_TO_EXP_TIME(sw_elem->count * |
| cbss->beacon_interval)); |
| } |
| |
| static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_channel *channel, |
| const u8 *country_ie, u8 country_ie_len, |
| const u8 *pwr_constr_elem) |
| { |
| struct ieee80211_country_ie_triplet *triplet; |
| int chan = ieee80211_frequency_to_channel(channel->center_freq); |
| int i, chan_pwr, chan_increment, new_ap_level; |
| bool have_chan_pwr = false; |
| |
| /* Invalid IE */ |
| if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) |
| return 0; |
| |
| triplet = (void *)(country_ie + 3); |
| country_ie_len -= 3; |
| |
| switch (channel->band) { |
| default: |
| WARN_ON_ONCE(1); |
| /* fall through */ |
| case IEEE80211_BAND_2GHZ: |
| case IEEE80211_BAND_60GHZ: |
| chan_increment = 1; |
| break; |
| case IEEE80211_BAND_5GHZ: |
| chan_increment = 4; |
| break; |
| } |
| |
| /* find channel */ |
| while (country_ie_len >= 3) { |
| u8 first_channel = triplet->chans.first_channel; |
| |
| if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) |
| goto next; |
| |
| for (i = 0; i < triplet->chans.num_channels; i++) { |
| if (first_channel + i * chan_increment == chan) { |
| have_chan_pwr = true; |
| chan_pwr = triplet->chans.max_power; |
| break; |
| } |
| } |
| if (have_chan_pwr) |
| break; |
| |
| next: |
| triplet++; |
| country_ie_len -= 3; |
| } |
| |
| if (!have_chan_pwr) |
| return 0; |
| |
| new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem); |
| |
| if (sdata->ap_power_level == new_ap_level) |
| return 0; |
| |
| sdata_info(sdata, |
| "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", |
| new_ap_level, chan_pwr, *pwr_constr_elem, |
| sdata->u.mgd.bssid); |
| sdata->ap_power_level = new_ap_level; |
| if (__ieee80211_recalc_txpower(sdata)) |
| return BSS_CHANGED_TXPOWER; |
| return 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->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; |
| } |
| |
| 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; |
| } |
| |
| ieee80211_change_ps(local); |
| } |
| |
| void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) |
| { |
| bool ps_allowed = ieee80211_powersave_allowed(sdata); |
| |
| if (sdata->vif.bss_conf.ps != ps_allowed) { |
| sdata->vif.bss_conf.ps = ps_allowed; |
| ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); |
| } |
| } |
| |
| 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 bool 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 false; |
| |
| if (local->hw.queues < IEEE80211_NUM_ACS) |
| return false; |
| |
| if (!wmm_param) |
| return false; |
| |
| if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
| return false; |
| |
| 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 false; |
| ifmgd->wmm_last_param_set = count; |
| |
| pos = wmm_param + 8; |
| left = wmm_param_len - 8; |
| |
| memset(¶ms, 0, sizeof(params)); |
| |
| sdata->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) |
| sdata->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) |
| sdata->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) |
| sdata->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) |
| sdata->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; |
| |
| mlme_dbg(sdata, |
| "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); |
| sdata->tx_conf[queue] = params; |
| if (drv_conf_tx(local, sdata, queue, ¶ms)) |
| sdata_err(sdata, |
| "failed to set TX queue parameters for queue %d\n", |
| queue); |
| } |
| |
| /* enable WMM or activate new settings */ |
| sdata->vif.bss_conf.qos = true; |
| return true; |
| } |
| |
| static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) |
| { |
| lockdep_assert_held(&sdata->local->mtx); |
| |
| sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL | |
| IEEE80211_STA_BEACON_POLL); |
| ieee80211_run_deferred_scan(sdata->local); |
| } |
| |
| static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) |
| { |
| mutex_lock(&sdata->local->mtx); |
| __ieee80211_stop_poll(sdata); |
| mutex_unlock(&sdata->local->mtx); |
| } |
| |
| 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 (ieee80211_get_sdata_band(sdata) == 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; |
| bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
| bss_conf->assoc_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; |
| |
| if (sdata->vif.p2p) { |
| const struct cfg80211_bss_ies *ies; |
| |
| rcu_read_lock(); |
| ies = rcu_dereference(cbss->ies); |
| if (ies) { |
| u8 noa[2]; |
| int ret; |
| |
| ret = cfg80211_get_p2p_attr( |
| ies->data, ies->len, |
| IEEE80211_P2P_ATTR_ABSENCE_NOTICE, |
| noa, sizeof(noa)); |
| if (ret >= 2) { |
| bss_conf->p2p_oppps = noa[1] & 0x80; |
| bss_conf->p2p_ctwindow = noa[1] & 0x7f; |
| bss_info_changed |= BSS_CHANGED_P2P_PS; |
| sdata->u.mgd.p2p_noa_index = noa[0]; |
| } |
| } |
| rcu_read_unlock(); |
| } |
| |
| /* just to be sure */ |
| ieee80211_stop_poll(sdata); |
| |
| 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); |
| mutex_unlock(&local->iflist_mtx); |
| |
| ieee80211_recalc_smps(sdata); |
| ieee80211_recalc_ps_vif(sdata); |
| |
| 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; |
| |
| ieee80211_stop_poll(sdata); |
| |
| 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, false); |
| } |
| mutex_unlock(&local->sta_mtx); |
| |
| /* |
| * if we want to get out of ps before disassoc (why?) we have |
| * to do it before sending disassoc, as otherwise the null-packet |
| * won't be valid. |
| */ |
| 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 per-vif ps */ |
| ieee80211_recalc_ps_vif(sdata); |
| |
| /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */ |
| if (tx) |
| drv_flush(local, false); |
| |
| /* 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; |
| |
| sdata->vif.bss_conf.p2p_ctwindow = 0; |
| sdata->vif.bss_conf.p2p_oppps = false; |
| |
| /* on the next assoc, re-program HT parameters */ |
| memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); |
| memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); |
| |
| sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; |
| |
| del_timer_sync(&local->dynamic_ps_timer); |
| cancel_work_sync(&local->dynamic_ps_enable_work); |
| |
| /* 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); |
| |
| /* 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); |
| |
| sdata->u.mgd.timers_running = 0; |
| |
| ifmgd->flags = 0; |
| ieee80211_vif_release_channel(sdata); |
| } |
| |
| 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; |
| struct ieee80211_local *local = sdata->local; |
| |
| mutex_lock(&local->mtx); |
| if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
| IEEE80211_STA_CONNECTION_POLL))) { |
| mutex_unlock(&local->mtx); |
| return; |
| } |
| |
| __ieee80211_stop_poll(sdata); |
| |
| mutex_lock(&local->iflist_mtx); |
| ieee80211_recalc_ps(local, -1); |
| mutex_unlock(&local->iflist_mtx); |
| |
| if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
| goto out; |
| |
| /* |
| * 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)); |
| out: |
| mutex_unlock(&local->mtx); |
| } |
| |
| 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. |
| */ |
| ifmgd->probe_send_count++; |
| |
| if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
| ifmgd->nullfunc_failed = false; |
| ieee80211_send_nullfunc(sdata->local, sdata, 0); |
| } else { |
| int ssid_len; |
| |
| rcu_read_lock(); |
| ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); |
| if (WARN_ON_ONCE(ssid == NULL)) |
| ssid_len = 0; |
| else |
| ssid_len = ssid[1]; |
| |
| ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL, |
| 0, (u32) -1, true, false, |
| ifmgd->associated->channel, false); |
| rcu_read_unlock(); |
| } |
| |
| ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); |
| run_again(ifmgd, ifmgd->probe_timeout); |
| if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
| drv_flush(sdata->local, false); |
| } |
| |
| 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; |
| |
| mutex_lock(&ifmgd->mtx); |
| |
| if (!ifmgd->associated) |
| goto out; |
| |
| mutex_lock(&sdata->local->mtx); |
| |
| if (sdata->local->tmp_channel || sdata->local->scanning) { |
| mutex_unlock(&sdata->local->mtx); |
| goto out; |
| } |
| |
| if (beacon) |
| mlme_dbg_ratelimited(sdata, |
| "detected beacon loss from AP - sending probe request\n"); |
| |
| ieee80211_cqm_rssi_notify(&sdata->vif, |
| NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL); |
| |
| /* |
| * 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; |
| |
| mutex_unlock(&sdata->local->mtx); |
| |
| 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 cfg80211_bss *cbss; |
| struct sk_buff *skb; |
| const u8 *ssid; |
| int ssid_len; |
| |
| if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
| return NULL; |
| |
| ASSERT_MGD_MTX(ifmgd); |
| |
| if (ifmgd->associated) |
| cbss = ifmgd->associated; |
| else if (ifmgd->auth_data) |
| cbss = ifmgd->auth_data->bss; |
| else if (ifmgd->assoc_data) |
| cbss = ifmgd->assoc_data->bss; |
| else |
| return NULL; |
| |
| rcu_read_lock(); |
| ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); |
| if (WARN_ON_ONCE(ssid == NULL)) |
| ssid_len = 0; |
| else |
| ssid_len = ssid[1]; |
| |
| skb = ieee80211_build_probe_req(sdata, cbss->bssid, |
| (u32) -1, cbss->channel, |
| ssid + 2, ssid_len, |
| NULL, 0, true); |
| rcu_read_unlock(); |
| |
| return skb; |
| } |
| EXPORT_SYMBOL(ieee80211_ap_probereq_get); |
| |
| static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata, |
| bool transmit_frame) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
| |
| mutex_lock(&ifmgd->mtx); |
| if (!ifmgd->associated) { |
| mutex_unlock(&ifmgd->mtx); |
| return; |
| } |
| |
| ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
| WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, |
| transmit_frame, frame_buf); |
| ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; |
| mutex_unlock(&ifmgd->mtx); |
| |
| /* |
| * must be outside lock due to cfg80211, |
| * but that's not a problem. |
| */ |
| cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN); |
| |
| mutex_lock(&local->mtx); |
| ieee80211_recalc_idle(local); |
| mutex_unlock(&local->mtx); |
| } |
| |
| static 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) { |
| sdata_info(sdata, "Connection to AP %pM lost\n", |
| ifmgd->bssid); |
| __ieee80211_disconnect(sdata, false); |
| } else { |
| ieee80211_mgd_probe_ap(sdata, true); |
| } |
| } |
| |
| static void ieee80211_csa_connection_drop_work(struct work_struct *work) |
| { |
| struct ieee80211_sub_if_data *sdata = |
| container_of(work, struct ieee80211_sub_if_data, |
| u.mgd.csa_connection_drop_work); |
| |
| ieee80211_wake_queues_by_reason(&sdata->local->hw, |
| IEEE80211_QUEUE_STOP_REASON_CSA); |
| __ieee80211_disconnect(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); |
| sdata->u.mgd.flags = 0; |
| ieee80211_vif_release_channel(sdata); |
| } |
| |
| 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; |
| drv_mgd_prepare_tx(sdata->local, sdata); |
| ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, |
| 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 (!ether_addr_equal(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) { |
| sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", |
| mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, |
| auth_transaction, |
| ifmgd->auth_data->expected_transaction); |
| return RX_MGMT_NONE; |
| } |
| |
| if (status_code != WLAN_STATUS_SUCCESS) { |
| sdata_info(sdata, "%pM denied authentication (status %d)\n", |
| 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: |
| case WLAN_AUTH_SAE: |
| 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; |
| } |
| |
| sdata_info(sdata, "authenticated\n"); |
| ifmgd->auth_data->done = true; |
| ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; |
| run_again(ifmgd, ifmgd->auth_data->timeout); |
| |
| if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && |
| ifmgd->auth_data->expected_transaction != 2) { |
| /* |
| * Report auth frame to user space for processing since another |
| * round of Authentication frames is still needed. |
| */ |
| return RX_MGMT_CFG80211_RX_AUTH; |
| } |
| |
| /* 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)) { |
| sdata_info(sdata, "failed moving %pM to auth\n", 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 || |
| !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
| return RX_MGMT_NONE; |
| |
| bssid = ifmgd->associated->bssid; |
| |
| reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); |
| |
| sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n", |
| 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 || |
| !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
| return RX_MGMT_NONE; |
| |
| reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); |
| |
| sdata_info(sdata, "disassociated from %pM (Reason: %u)\n", |
| 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); |
| sdata->u.mgd.flags = 0; |
| ieee80211_vif_release_channel(sdata); |
| } |
| |
| 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; |
| |
| /* 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))) |
| sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n", |
| aid); |
| aid &= ~(BIT(15) | BIT(14)); |
| |
| ifmgd->broken_ap = false; |
| |
| if (aid == 0 || aid > IEEE80211_MAX_AID) { |
| sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", |
| 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) { |
| sdata_info(sdata, "no SuppRates element in AssocResp\n"); |
| 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[ieee80211_get_sdata_band(sdata)]; |
| |
| if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) |
| ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
| elems.ht_cap_elem, &sta->sta.ht_cap); |
| |
| sta->supports_40mhz = |
| sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
| |
| if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) |
| ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, |
| elems.vht_cap_elem, |
| &sta->sta.vht_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) { |
| sdata_info(sdata, |
| "failed to move station %pM to desired state\n", |
| 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_operation && elems.wmm_param && |
| !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) |
| changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation, |
| cbss->bssid, 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 (!ether_addr_equal(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); |
| |
| sdata_info(sdata, |
| "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", |
| 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; |
| sdata_info(sdata, |
| "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", |
| 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) { |
| sdata_info(sdata, "%pM denied association (code=%d)\n", |
| 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; |
| } |
| sdata_info(sdata, "associated\n"); |
| |
| /* |
| * 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 && |
| ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) { |
| 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_ie && |
| memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0) |
| ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie, |
| 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 (!ether_addr_equal(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 && |
| ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
| ieee80211_reset_ap_probe(sdata); |
| |
| if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies && |
| ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) { |
| /* got probe response, continue with auth */ |
| sdata_info(sdata, "direct probe responded\n"); |
| 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_OPERATION); |
| |
| 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; |
| struct ieee80211_chanctx_conf *chanctx_conf; |
| struct ieee80211_channel *chan; |
| u32 changed = 0; |
| bool erp_valid; |
| 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; |
| |
| rcu_read_lock(); |
| chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| if (!chanctx_conf) { |
| rcu_read_unlock(); |
| return; |
| } |
| |
| if (rx_status->freq != chanctx_conf->def.chan->center_freq) { |
| rcu_read_unlock(); |
| return; |
| } |
| chan = chanctx_conf->def.chan; |
| rcu_read_unlock(); |
| |
| if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon && |
| ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { |
| 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 || |
| !ether_addr_equal(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; |
| 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) { |
| mlme_dbg_ratelimited(sdata, |
| "cancelling probereq poll due to a received beacon\n"); |
| mutex_lock(&local->mtx); |
| ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL; |
| ieee80211_run_deferred_scan(local); |
| mutex_unlock(&local->mtx); |
| |
| 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) { |
| bool directed_tim = ieee80211_check_tim(elems.tim, |
| elems.tim_len, |
| ifmgd->aid); |
| if (directed_tim) { |
| if (local->hw.conf.dynamic_ps_timeout > 0) { |
| if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
| local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
| ieee80211_hw_config(local, |
| IEEE80211_CONF_CHANGE_PS); |
| } |
| ieee80211_send_nullfunc(local, sdata, 0); |
| } else if (!local->pspolling && sdata->u.mgd.powersave) { |
| 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 (sdata->vif.p2p) { |
| u8 noa[2]; |
| int ret; |
| |
| ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, |
| len - baselen, |
| IEEE80211_P2P_ATTR_ABSENCE_NOTICE, |
| noa, sizeof(noa)); |
| if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) { |
| bss_conf->p2p_oppps = noa[1] & 0x80; |
| bss_conf->p2p_ctwindow = noa[1] & 0x7f; |
| changed |= BSS_CHANGED_P2P_PS; |
| sdata->u.mgd.p2p_noa_index = noa[0]; |
| /* |
| * make sure we update all information, the CRC |
| * mechanism doesn't look at P2P attributes. |
| */ |
| ifmgd->beacon_crc_valid = false; |
| } |
| } |
| |
| if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) |
| return; |
| ifmgd->beacon_crc = ncrc; |
| ifmgd->beacon_crc_valid = true; |
| |
| ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, |
| true); |
| |
| if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, |
| elems.wmm_param_len)) |
| changed |= BSS_CHANGED_QOS; |
| |
| 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_operation && elems.wmm_param && |
| !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) |
| changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation, |
| bssid, true); |
| |
| if (elems.country_elem && elems.pwr_constr_elem && |
| mgmt->u.probe_resp.capab_info & |
| cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) |
| changed |= ieee80211_handle_pwr_constr(sdata, chan, |
| elems.country_elem, |
| elems.country_elem_len, |
| elems.pwr_constr_elem); |
| |
| 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[IEEE80211_DEAUTH_FRAME_LEN]; |
| |
| 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, IEEE80211_DEAUTH_FRAME_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) { |
| sdata_info(sdata, "authentication with %pM timed out\n", |
| 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; |
| } |
| |
| drv_mgd_prepare_tx(local, sdata); |
| |
| if (auth_data->bss->proberesp_ies) { |
| u16 trans = 1; |
| u16 status = 0; |
| |
| sdata_info(sdata, "send auth to %pM (try %d/%d)\n", |
| auth_data->bss->bssid, auth_data->tries, |
| IEEE80211_AUTH_MAX_TRIES); |
| |
| auth_data->expected_transaction = 2; |
| |
| if (auth_data->algorithm == WLAN_AUTH_SAE) { |
| trans = auth_data->sae_trans; |
| status = auth_data->sae_status; |
| auth_data->expected_transaction = trans; |
| } |
| |
| ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, |
| auth_data->data, auth_data->data_len, |
| auth_data->bss->bssid, |
| auth_data->bss->bssid, NULL, 0, 0); |
| } else { |
| const u8 *ssidie; |
| |
| sdata_info(sdata, "direct probe to %pM (try %d/%i)\n", |
| auth_data->bss->bssid, auth_data->tries, |
| IEEE80211_AUTH_MAX_TRIES); |
| |
| rcu_read_lock(); |
| ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID); |
| if (!ssidie) { |
| rcu_read_unlock(); |
| 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->bss->channel, false); |
| rcu_read_unlock(); |
| } |
| |
| 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) { |
| sdata_info(sdata, "association with %pM timed out\n", |
| 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; |
| } |
| |
| sdata_info(sdata, "associate with %pM (try %d/%d)\n", |
| 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) { |
| mlme_dbg(sdata, |
| "No ack for nullfunc frame to AP %pM, try %d/%i\n", |
| bssid, ifmgd->probe_send_count, |
| max_tries); |
| ieee80211_mgd_probe_ap_send(sdata); |
| } else { |
| mlme_dbg(sdata, |
| "No ack for nullfunc frame to AP %pM, disconnecting.\n", |
| bssid); |
| 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) { |
| mlme_dbg(sdata, |
| "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", |
| bssid, probe_wait_ms); |
| ieee80211_sta_connection_lost(sdata, bssid, |
| WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); |
| } else if (ifmgd->probe_send_count < max_tries) { |
| mlme_dbg(sdata, |
| "No probe response from AP %pM after %dms, try %d/%i\n", |
| bssid, probe_wait_ms, |
| ifmgd->probe_send_count, max_tries); |
| 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) { |
| __ieee80211_stop_poll(sdata); |
| |
| /* 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); |
| cancel_work_sync(&ifmgd->csa_connection_drop_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) { |
| mlme_dbg(sdata, |
| "driver requested disconnect after resume\n"); |
| 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); |
| |
| mutex_lock(&sdata->local->mtx); |
| ieee80211_restart_sta_timer(sdata); |
| mutex_unlock(&sdata->local->mtx); |
| } |
| #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->csa_connection_drop_work, |
| ieee80211_csa_connection_drop_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; |
| |
| /* 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 u32 chandef_downgrade(struct cfg80211_chan_def *c) |
| { |
| u32 ret; |
| int tmp; |
| |
| switch (c->width) { |
| case NL80211_CHAN_WIDTH_20: |
| c->width = NL80211_CHAN_WIDTH_20_NOHT; |
| ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; |
| break; |
| case NL80211_CHAN_WIDTH_40: |
| c->width = NL80211_CHAN_WIDTH_20; |
| c->center_freq1 = c->chan->center_freq; |
| ret = IEEE80211_STA_DISABLE_40MHZ | |
| IEEE80211_STA_DISABLE_VHT; |
| break; |
| case NL80211_CHAN_WIDTH_80: |
| tmp = (30 + c->chan->center_freq - c->center_freq1)/20; |
| /* n_P40 */ |
| tmp /= 2; |
| /* freq_P40 */ |
| c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; |
| c->width = NL80211_CHAN_WIDTH_40; |
| ret = IEEE80211_STA_DISABLE_VHT; |
| break; |
| case NL80211_CHAN_WIDTH_80P80: |
| c->center_freq2 = 0; |
| c->width = NL80211_CHAN_WIDTH_80; |
| ret = IEEE80211_STA_DISABLE_80P80MHZ | |
| IEEE80211_STA_DISABLE_160MHZ; |
| break; |
| case NL80211_CHAN_WIDTH_160: |
| /* n_P20 */ |
| tmp = (70 + c->chan->center_freq - c->center_freq1)/20; |
| /* n_P80 */ |
| tmp /= 4; |
| c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; |
| c->width = NL80211_CHAN_WIDTH_80; |
| ret = IEEE80211_STA_DISABLE_80P80MHZ | |
| IEEE80211_STA_DISABLE_160MHZ; |
| break; |
| default: |
| case NL80211_CHAN_WIDTH_20_NOHT: |
| WARN_ON_ONCE(1); |
| c->width = NL80211_CHAN_WIDTH_20_NOHT; |
| ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; |
| break; |
| } |
| |
| WARN_ON_ONCE(!cfg80211_chandef_valid(c)); |
| |
| return ret; |
| } |
| |
| static u32 |
| ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_supported_band *sband, |
| struct ieee80211_channel *channel, |
| const struct ieee80211_ht_operation *ht_oper, |
| const struct ieee80211_vht_operation *vht_oper, |
| struct cfg80211_chan_def *chandef) |
| { |
| struct cfg80211_chan_def vht_chandef; |
| u32 ht_cfreq, ret; |
| |
| chandef->chan = channel; |
| chandef->width = NL80211_CHAN_WIDTH_20_NOHT; |
| chandef->center_freq1 = channel->center_freq; |
| chandef->center_freq2 = 0; |
| |
| if (!ht_oper || !sband->ht_cap.ht_supported) { |
| ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; |
| goto out; |
| } |
| |
| chandef->width = NL80211_CHAN_WIDTH_20; |
| |
| ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, |
| channel->band); |
| /* check that channel matches the right operating channel */ |
| if (channel->center_freq != ht_cfreq) { |
| /* |
| * It's possible that some APs are confused here; |
| * Netgear WNDR3700 sometimes reports 4 higher than |
| * the actual channel in association responses, but |
| * since we look at probe response/beacon data here |
| * it should be OK. |
| */ |
| sdata_info(sdata, |
| "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", |
| channel->center_freq, ht_cfreq, |
| ht_oper->primary_chan, channel->band); |
| ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; |
| goto out; |
| } |
| |
| /* check 40 MHz support, if we have it */ |
| if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { |
| switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
| case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: |
| chandef->width = NL80211_CHAN_WIDTH_40; |
| chandef->center_freq1 += 10; |
| break; |
| case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
| chandef->width = NL80211_CHAN_WIDTH_40; |
| chandef->center_freq1 -= 10; |
| break; |
| } |
| } else { |
| /* 40 MHz (and 80 MHz) must be supported for VHT */ |
| ret = IEEE80211_STA_DISABLE_VHT; |
| goto out; |
| } |
| |
| if (!vht_oper || !sband->vht_cap.vht_supported) { |
| ret = IEEE80211_STA_DISABLE_VHT; |
| goto out; |
| } |
| |
| vht_chandef.chan = channel; |
| vht_chandef.center_freq1 = |
| ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx, |
| channel->band); |
| vht_chandef.center_freq2 = 0; |
| |
| if (vht_oper->center_freq_seg2_idx) |
| vht_chandef.center_freq2 = |
| ieee80211_channel_to_frequency( |
| vht_oper->center_freq_seg2_idx, |
| channel->band); |
| |
| switch (vht_oper->chan_width) { |
| case IEEE80211_VHT_CHANWIDTH_USE_HT: |
| vht_chandef.width = chandef->width; |
| break; |
| case IEEE80211_VHT_CHANWIDTH_80MHZ: |
| vht_chandef.width = NL80211_CHAN_WIDTH_80; |
| break; |
| case IEEE80211_VHT_CHANWIDTH_160MHZ: |
| vht_chandef.width = NL80211_CHAN_WIDTH_160; |
| break; |
| case IEEE80211_VHT_CHANWIDTH_80P80MHZ: |
| vht_chandef.width = NL80211_CHAN_WIDTH_80P80; |
| break; |
| default: |
| sdata_info(sdata, |
| "AP VHT operation IE has invalid channel width (%d), disable VHT\n", |
| vht_oper->chan_width); |
| ret = IEEE80211_STA_DISABLE_VHT; |
| goto out; |
| } |
| |
| if (!cfg80211_chandef_valid(&vht_chandef)) { |
| sdata_info(sdata, |
| "AP VHT information is invalid, disable VHT\n"); |
| ret = IEEE80211_STA_DISABLE_VHT; |
| goto out; |
| } |
| |
| if (cfg80211_chandef_identical(chandef, &vht_chandef)) { |
| ret = 0; |
| goto out; |
| } |
| |
| if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { |
| sdata_info(sdata, |
| "AP VHT information doesn't match HT, disable VHT\n"); |
| ret = IEEE80211_STA_DISABLE_VHT; |
| goto out; |
| } |
| |
| *chandef = vht_chandef; |
| |
| ret = 0; |
| |
| while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, |
| IEEE80211_CHAN_DISABLED)) { |
| if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { |
| ret = IEEE80211_STA_DISABLE_HT | |
| IEEE80211_STA_DISABLE_VHT; |
| goto out; |
| } |
| |
| ret = chandef_downgrade(chandef); |
| } |
| |
| if (chandef->width != vht_chandef.width) |
| sdata_info(sdata, |
| "local regulatory prevented using AP HT/VHT configuration, downgraded\n"); |
| |
| out: |
| WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); |
| return ret; |
| } |
| |
| static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, |
| struct cfg80211_bss *cbss) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| const u8 *ht_cap_ie, *vht_cap_ie; |
| const struct ieee80211_ht_cap *ht_cap; |
| const struct ieee80211_vht_cap *vht_cap; |
| u8 chains = 1; |
| |
| if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) |
| return chains; |
| |
| ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); |
| if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { |
| ht_cap = (void *)(ht_cap_ie + 2); |
| chains = ieee80211_mcs_to_chains(&ht_cap->mcs); |
| /* |
| * TODO: use "Tx Maximum Number Spatial Streams Supported" and |
| * "Tx Unequal Modulation Supported" fields. |
| */ |
| } |
| |
| if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) |
| return chains; |
| |
| vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); |
| if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { |
| u8 nss; |
| u16 tx_mcs_map; |
| |
| vht_cap = (void *)(vht_cap_ie + 2); |
| tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); |
| for (nss = 8; nss > 0; nss--) { |
| if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != |
| IEEE80211_VHT_MCS_NOT_SUPPORTED) |
| break; |
| } |
| /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ |
| chains = max(chains, nss); |
| } |
| |
| return chains; |
| } |
| |
| static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, |
| struct cfg80211_bss *cbss) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| const struct ieee80211_ht_operation *ht_oper = NULL; |
| const struct ieee80211_vht_operation *vht_oper = NULL; |
| struct ieee80211_supported_band *sband; |
| struct cfg80211_chan_def chandef; |
| int ret; |
| |
| sband = local->hw.wiphy->bands[cbss->channel->band]; |
| |
| ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | |
| IEEE80211_STA_DISABLE_80P80MHZ | |
| IEEE80211_STA_DISABLE_160MHZ); |
| |
| rcu_read_lock(); |
| |
| if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && |
| sband->ht_cap.ht_supported) { |
| const u8 *ht_oper_ie; |
| |
| ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); |
| if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) |
| ht_oper = (void *)(ht_oper_ie + 2); |
| } |
| |
| if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && |
| sband->vht_cap.vht_supported) { |
| const u8 *vht_oper_ie; |
| |
| vht_oper_ie = ieee80211_bss_get_ie(cbss, |
| WLAN_EID_VHT_OPERATION); |
| if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) |
| vht_oper = (void *)(vht_oper_ie + 2); |
| if (vht_oper && !ht_oper) { |
| vht_oper = NULL; |
| sdata_info(sdata, |
| "AP advertised VHT without HT, disabling both\n"); |
| sdata->flags |= IEEE80211_STA_DISABLE_HT; |
| sdata->flags |= IEEE80211_STA_DISABLE_VHT; |
| } |
| } |
| |
| ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, |
| cbss->channel, |
| ht_oper, vht_oper, |
| &chandef); |
| |
| sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), |
| local->rx_chains); |
| |
| rcu_read_unlock(); |
| |
| /* will change later if needed */ |
| sdata->smps_mode = IEEE80211_SMPS_OFF; |
| |
| /* |
| * If this fails (possibly due to channel context sharing |
| * on incompatible channels, e.g. 80+80 and 160 sharing the |
| * same control channel) try to use a smaller bandwidth. |
| */ |
| ret = ieee80211_vif_use_channel(sdata, &chandef, |
| IEEE80211_CHANCTX_SHARED); |
| while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) |
| ifmgd->flags |= chandef_downgrade(&chandef); |
| return ret; |
| } |
| |
| 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 *new_sta = NULL; |
| 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) { |
| new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); |
| if (!new_sta) |
| return -ENOMEM; |
| } |
| |
| mutex_lock(&local->mtx); |
| ieee80211_recalc_idle(sdata->local); |
| mutex_unlock(&local->mtx); |
| |
| if (new_sta) { |
| u32 rates = 0, basic_rates = 0; |
| bool have_higher_than_11mbit; |
| int min_rate = INT_MAX, min_rate_index = -1; |
| struct ieee80211_supported_band *sband; |
| |
| sband = local->hw.wiphy->bands[cbss->channel->band]; |
| |
| err = ieee80211_prep_channel(sdata, cbss); |
| if (err) { |
| sta_info_free(local, new_sta); |
| return err; |
| } |
| |
| 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) { |
| sdata_info(sdata, |
| "No basic rates, using min rate instead\n"); |
| basic_rates = BIT(min_rate_index); |
| } |
| |
| new_sta->sta.supp_rates[cbss->channel->band] = rates; |
| sdata->vif.bss_conf.basic_rates = basic_rates; |
| |
| /* cf. IEEE 802.11 9.2.12 */ |
| if (cbss->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); |
| |
| /* set timing information */ |
| sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; |
| sdata->vif.bss_conf.sync_tsf = cbss->tsf; |
| sdata->vif.bss_conf.sync_device_ts = bss->device_ts; |
| |
| /* tell driver about BSSID, basic rates and timing */ |
| ieee80211_bss_info_change_notify(sdata, |
| BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | |
| BSS_CHANGED_BEACON_INT); |
| |
| if (assoc) |
| sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); |
| |
| err = sta_info_insert(new_sta); |
| new_sta = NULL; |
| if (err) { |
| sdata_info(sdata, |
| "failed to insert STA entry for the AP (error %d)\n", |
| err); |
| return err; |
| } |
| } else |
| WARN_ON_ONCE(!ether_addr_equal(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; |
| case NL80211_AUTHTYPE_SAE: |
| auth_alg = WLAN_AUTH_SAE; |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| |
| auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len + |
| req->ie_len, GFP_KERNEL); |
| if (!auth_data) |
| return -ENOMEM; |
| |
| auth_data->bss = req->bss; |
| |
| if (req->sae_data_len >= 4) { |
| __le16 *pos = (__le16 *) req->sae_data; |
| auth_data->sae_trans = le16_to_cpu(pos[0]); |
| auth_data->sae_status = le16_to_cpu(pos[1]); |
| memcpy(auth_data->data, req->sae_data + 4, |
| req->sae_data_len - 4); |
| auth_data->data_len += req->sae_data_len - 4; |
| } |
| |
| if (req->ie && req->ie_len) { |
| memcpy(&auth_data->data[auth_data->data_len], |
| req->ie, req->ie_len); |
| auth_data->data_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); |
| |
| sdata_info(sdata, "authenticate with %pM\n", 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, *ht_ie; |
| int i, err; |
| |
| assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); |
| if (!assoc_data) |
| return -ENOMEM; |
| |
| rcu_read_lock(); |
| ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
| if (!ssidie) { |
| rcu_read_unlock(); |
| kfree(assoc_data); |
| return -EINVAL; |
| } |
| memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); |
| assoc_data->ssid_len = ssidie[1]; |
| rcu_read_unlock(); |
| |
| 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 = ether_addr_equal(ifmgd->bssid, req->bss->bssid); |
| ieee80211_destroy_auth_data(sdata, match); |
| } |
| |
| /* prepare assoc data */ |
| |
| 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_HT; |
| 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_HT; |
| 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 < IEEE80211_NUM_ACS || !bss->wmm_used) { |
| ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
| if (!bss->wmm_used) |
| netdev_info(sdata->dev, |
| "disabling HT as WMM/QoS is not supported by the AP\n"); |
| } |
| |
| /* 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; |
| if (!bss->wmm_used) |
| netdev_info(sdata->dev, |
| "disabling VHT as WMM/QoS is not supported by the AP\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) |
| sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; |
| else |
| sdata->smps_mode = IEEE80211_SMPS_OFF; |
| } else |
| sdata->smps_mode = ifmgd->req_smps; |
| |
| assoc_data->capability = req->bss->capability; |
| assoc_data->wmm = bss->wmm_used && |
| (local->hw.queues >= IEEE80211_NUM_ACS); |
| assoc_data->supp_rates = bss->supp_rates; |
| assoc_data->supp_rates_len = bss->supp_rates_len; |
| |
| rcu_read_lock(); |
| ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); |
| if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) |
| assoc_data->ap_ht_param = |
| ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; |
| else |
| ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
| rcu_read_unlock(); |
| |
| 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; |
| } |
| |
| 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? |
| */ |
| sdata_info(sdata, "waiting for beacon from %pM\n", |
| 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"; |
| sdata_info(sdata, "associating with AP with corrupt %s\n", |
| 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[IEEE80211_DEAUTH_FRAME_LEN]; |
| bool tx = !req->local_state_change; |
| bool sent_frame = false; |
| |
| mutex_lock(&ifmgd->mtx); |
| |
| sdata_info(sdata, |
| "deauthenticating from %pM by local choice (reason=%d)\n", |
| req->bssid, req->reason_code); |
| |
| if (ifmgd->auth_data) { |
| drv_mgd_prepare_tx(sdata->local, sdata); |
| ieee80211_send_deauth_disassoc(sdata, req->bssid, |
| IEEE80211_STYPE_DEAUTH, |
| req->reason_code, tx, |
| frame_buf); |
| ieee80211_destroy_auth_data(sdata, false); |
| mutex_unlock(&ifmgd->mtx); |
| |
| sent_frame = tx; |
| goto out; |
| } |
| |
| if (ifmgd->associated && |
| ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { |
| ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
| req->reason_code, tx, frame_buf); |
| sent_frame = tx; |
| } |
| mutex_unlock(&ifmgd->mtx); |
| |
| out: |
| mutex_lock(&sdata->local->mtx); |
| ieee80211_recalc_idle(sdata->local); |
| mutex_unlock(&sdata->local->mtx); |
| |
| if (sent_frame) |
| __cfg80211_send_deauth(sdata->dev, frame_buf, |
| IEEE80211_DEAUTH_FRAME_LEN); |
| |
| 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[IEEE80211_DEAUTH_FRAME_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; |
| } |
| |
| sdata_info(sdata, |
| "disassociating from %pM by local choice (reason=%d)\n", |
| 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, |
| IEEE80211_DEAUTH_FRAME_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); |