| /* |
| * 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/rtnetlink.h> |
| #include <linux/pm_qos_params.h> |
| #include <linux/crc32.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_ASSOC_TIMEOUT (HZ / 5) |
| #define IEEE80211_ASSOC_MAX_TRIES 3 |
| #define IEEE80211_MAX_PROBE_TRIES 5 |
| |
| /* |
| * beacon loss detection timeout |
| * XXX: should depend on beacon interval |
| */ |
| #define IEEE80211_BEACON_LOSS_TIME (2 * HZ) |
| /* |
| * 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. |
| */ |
| #define IEEE80211_PROBE_WAIT (HZ / 2) |
| |
| #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_rx_auth() */ |
| RX_MGMT_CFG80211_AUTH, |
| |
| /* caller must call cfg80211_send_rx_assoc() */ |
| RX_MGMT_CFG80211_ASSOC, |
| |
| /* caller must call cfg80211_send_deauth() */ |
| RX_MGMT_CFG80211_DEAUTH, |
| |
| /* caller must call cfg80211_send_disassoc() */ |
| RX_MGMT_CFG80211_DISASSOC, |
| |
| /* caller must call cfg80211_auth_timeout() & free work */ |
| RX_MGMT_CFG80211_AUTH_TO, |
| |
| /* caller must call cfg80211_assoc_timeout() & free work */ |
| RX_MGMT_CFG80211_ASSOC_TO, |
| }; |
| |
| /* utils */ |
| static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd) |
| { |
| WARN_ON(!mutex_is_locked(&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); |
| } |
| |
| static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata) |
| { |
| if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER) |
| return; |
| |
| mod_timer(&sdata->u.mgd.bcn_mon_timer, |
| round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME)); |
| } |
| |
| static int ecw2cw(int ecw) |
| { |
| return (1 << ecw) - 1; |
| } |
| |
| static int ieee80211_compatible_rates(struct ieee80211_bss *bss, |
| struct ieee80211_supported_band *sband, |
| u32 *rates) |
| { |
| int i, j, count; |
| *rates = 0; |
| count = 0; |
| for (i = 0; i < bss->supp_rates_len; i++) { |
| int rate = (bss->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; |
| } |
| |
| /* |
| * ieee80211_enable_ht should be called only after the operating band |
| * has been determined as ht configuration depends on the hw's |
| * HT abilities for a specific band. |
| */ |
| static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_ht_info *hti, |
| const u8 *bssid, u16 ap_ht_cap_flags) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_supported_band *sband; |
| struct sta_info *sta; |
| u32 changed = 0; |
| u16 ht_opmode; |
| bool enable_ht = true, ht_changed; |
| enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; |
| |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| |
| /* HT is not supported */ |
| if (!sband->ht_cap.ht_supported) |
| enable_ht = false; |
| |
| /* check that channel matches the right operating channel */ |
| if (local->hw.conf.channel->center_freq != |
| ieee80211_channel_to_frequency(hti->control_chan)) |
| enable_ht = false; |
| |
| if (enable_ht) { |
| channel_type = NL80211_CHAN_HT20; |
| |
| if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) && |
| (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && |
| (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) { |
| switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
| case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: |
| if (!(local->hw.conf.channel->flags & |
| IEEE80211_CHAN_NO_HT40PLUS)) |
| channel_type = NL80211_CHAN_HT40PLUS; |
| break; |
| case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
| if (!(local->hw.conf.channel->flags & |
| IEEE80211_CHAN_NO_HT40MINUS)) |
| channel_type = NL80211_CHAN_HT40MINUS; |
| break; |
| } |
| } |
| } |
| |
| ht_changed = conf_is_ht(&local->hw.conf) != enable_ht || |
| channel_type != local->hw.conf.channel_type; |
| |
| local->oper_channel_type = channel_type; |
| |
| if (ht_changed) { |
| /* channel_type change automatically detected */ |
| ieee80211_hw_config(local, 0); |
| |
| rcu_read_lock(); |
| sta = sta_info_get(local, bssid); |
| if (sta) |
| rate_control_rate_update(local, sband, sta, |
| IEEE80211_RC_HT_CHANGED); |
| rcu_read_unlock(); |
| } |
| |
| /* disable HT */ |
| if (!enable_ht) |
| return 0; |
| |
| ht_opmode = le16_to_cpu(hti->operation_mode); |
| |
| /* if bss configuration changed store the new one */ |
| if (!sdata->ht_opmode_valid || |
| sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { |
| changed |= BSS_CHANGED_HT; |
| sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
| sdata->ht_opmode_valid = true; |
| } |
| |
| return changed; |
| } |
| |
| /* frame sending functions */ |
| |
| static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_mgd_work *wk) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| u8 *pos; |
| const u8 *ies, *ht_ie; |
| int i, len, count, rates_len, supp_rates_len; |
| u16 capab; |
| int wmm = 0; |
| struct ieee80211_supported_band *sband; |
| u32 rates = 0; |
| |
| skb = dev_alloc_skb(local->hw.extra_tx_headroom + |
| sizeof(*mgmt) + 200 + wk->ie_len + |
| wk->ssid_len); |
| if (!skb) { |
| printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " |
| "frame\n", sdata->dev->name); |
| return; |
| } |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| |
| capab = ifmgd->capab; |
| |
| if (local->hw.conf.channel->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 (wk->bss->cbss.capability & WLAN_CAPABILITY_PRIVACY) |
| capab |= WLAN_CAPABILITY_PRIVACY; |
| if (wk->bss->wmm_used) |
| wmm = 1; |
| |
| /* 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(wk->bss, sband, &rates); |
| |
| if ((wk->bss->cbss.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, wk->bss->cbss.bssid, ETH_ALEN); |
| memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
| memcpy(mgmt->bssid, wk->bss->cbss.bssid, ETH_ALEN); |
| |
| if (!is_zero_ether_addr(wk->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, wk->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 */ |
| ies = pos = skb_put(skb, 2 + wk->ssid_len); |
| *pos++ = WLAN_EID_SSID; |
| *pos++ = wk->ssid_len; |
| memcpy(pos, wk->ssid, wk->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; |
| |
| len = sband->n_bitrates; |
| pos = skb_put(skb, supp_rates_len + 2); |
| *pos++ = WLAN_EID_SUPP_RATES; |
| *pos++ = supp_rates_len; |
| |
| count = 0; |
| for (i = 0; i < sband->n_bitrates; i++) { |
| if (BIT(i) & rates) { |
| int rate = sband->bitrates[i].bitrate; |
| *pos++ = (u8) (rate / 5); |
| if (++count == 8) |
| break; |
| } |
| } |
| |
| if (rates_len > count) { |
| pos = skb_put(skb, rates_len - count + 2); |
| *pos++ = WLAN_EID_EXT_SUPP_RATES; |
| *pos++ = rates_len - count; |
| |
| for (i++; i < sband->n_bitrates; i++) { |
| if (BIT(i) & rates) { |
| int rate = sband->bitrates[i].bitrate; |
| *pos++ = (u8) (rate / 5); |
| } |
| } |
| } |
| |
| if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { |
| /* 1. power capabilities */ |
| pos = skb_put(skb, 4); |
| *pos++ = WLAN_EID_PWR_CAPABILITY; |
| *pos++ = 2; |
| *pos++ = 0; /* min tx power */ |
| *pos++ = local->hw.conf.channel->max_power; /* max tx power */ |
| |
| /* 2. supported channels */ |
| /* TODO: get this in reg domain format */ |
| pos = skb_put(skb, 2 * sband->n_channels + 2); |
| *pos++ = WLAN_EID_SUPPORTED_CHANNELS; |
| *pos++ = 2 * sband->n_channels; |
| for (i = 0; i < sband->n_channels; i++) { |
| *pos++ = ieee80211_frequency_to_channel( |
| sband->channels[i].center_freq); |
| *pos++ = 1; /* one channel in the subband*/ |
| } |
| } |
| |
| if (wk->ie_len && wk->ie) { |
| pos = skb_put(skb, wk->ie_len); |
| memcpy(pos, wk->ie, wk->ie_len); |
| } |
| |
| if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) { |
| 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++ = 0; |
| } |
| |
| /* wmm support is a must to HT */ |
| /* |
| * 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. |
| */ |
| if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
| sband->ht_cap.ht_supported && |
| (ht_ie = ieee80211_bss_get_ie(&wk->bss->cbss, WLAN_EID_HT_INFORMATION)) && |
| ht_ie[1] >= sizeof(struct ieee80211_ht_info) && |
| (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) { |
| struct ieee80211_ht_info *ht_info = |
| (struct ieee80211_ht_info *)(ht_ie + 2); |
| u16 cap = sband->ht_cap.cap; |
| __le16 tmp; |
| u32 flags = local->hw.conf.channel->flags; |
| |
| switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
| case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: |
| if (flags & IEEE80211_CHAN_NO_HT40PLUS) { |
| cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
| cap &= ~IEEE80211_HT_CAP_SGI_40; |
| } |
| break; |
| case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
| if (flags & IEEE80211_CHAN_NO_HT40MINUS) { |
| cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
| cap &= ~IEEE80211_HT_CAP_SGI_40; |
| } |
| break; |
| } |
| |
| tmp = cpu_to_le16(cap); |
| pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); |
| *pos++ = WLAN_EID_HT_CAPABILITY; |
| *pos++ = sizeof(struct ieee80211_ht_cap); |
| memset(pos, 0, sizeof(struct ieee80211_ht_cap)); |
| memcpy(pos, &tmp, sizeof(u16)); |
| pos += sizeof(u16); |
| /* TODO: needs a define here for << 2 */ |
| *pos++ = sband->ht_cap.ampdu_factor | |
| (sband->ht_cap.ampdu_density << 2); |
| memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); |
| } |
| |
| ieee80211_tx_skb(sdata, skb, 0); |
| } |
| |
| |
| static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
| const u8 *bssid, u16 stype, u16 reason, |
| void *cookie) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| |
| skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
| if (!skb) { |
| printk(KERN_DEBUG "%s: failed to allocate buffer for " |
| "deauth/disassoc frame\n", sdata->dev->name); |
| return; |
| } |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| |
| mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| memset(mgmt, 0, 24); |
| memcpy(mgmt->da, bssid, ETH_ALEN); |
| memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
| memcpy(mgmt->bssid, bssid, ETH_ALEN); |
| mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
| skb_put(skb, 2); |
| /* u.deauth.reason_code == u.disassoc.reason_code */ |
| mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
| |
| if (stype == IEEE80211_STYPE_DEAUTH) |
| if (cookie) |
| __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
| else |
| cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
| else |
| if (cookie) |
| __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); |
| else |
| cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); |
| ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED); |
| } |
| |
| void ieee80211_send_pspoll(struct ieee80211_local *local, |
| struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_pspoll *pspoll; |
| struct sk_buff *skb; |
| u16 fc; |
| |
| skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); |
| if (!skb) { |
| printk(KERN_DEBUG "%s: failed to allocate buffer for " |
| "pspoll frame\n", sdata->dev->name); |
| return; |
| } |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| |
| pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); |
| memset(pspoll, 0, sizeof(*pspoll)); |
| fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM; |
| pspoll->frame_control = cpu_to_le16(fc); |
| pspoll->aid = cpu_to_le16(ifmgd->aid); |
| |
| /* aid in PS-Poll has its two MSBs each set to 1 */ |
| pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); |
| |
| memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); |
| memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN); |
| |
| ieee80211_tx_skb(sdata, skb, 0); |
| } |
| |
| void ieee80211_send_nullfunc(struct ieee80211_local *local, |
| struct ieee80211_sub_if_data *sdata, |
| int powersave) |
| { |
| 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 + 24); |
| if (!skb) { |
| printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " |
| "frame\n", sdata->dev->name); |
| return; |
| } |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| |
| nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); |
| memset(nullfunc, 0, 24); |
| fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | |
| IEEE80211_FCTL_TODS); |
| if (powersave) |
| fc |= cpu_to_le16(IEEE80211_FCTL_PM); |
| nullfunc->frame_control = fc; |
| memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); |
| memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); |
| memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); |
| |
| ieee80211_tx_skb(sdata, skb, 0); |
| } |
| |
| /* 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 (!netif_running(sdata->dev)) |
| return; |
| |
| mutex_lock(&ifmgd->mtx); |
| if (!ifmgd->associated) |
| goto out; |
| |
| sdata->local->oper_channel = sdata->local->csa_channel; |
| ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL); |
| |
| /* XXX: shouldn't really modify cfg80211-owned data! */ |
| ifmgd->associated->cbss.channel = sdata->local->oper_channel; |
| |
| ieee80211_wake_queues_by_reason(&sdata->local->hw, |
| IEEE80211_QUEUE_STOP_REASON_CSA); |
| out: |
| ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; |
| mutex_unlock(&ifmgd->mtx); |
| } |
| |
| 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) |
| { |
| 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); |
| |
| ASSERT_MGD_MTX(ifmgd); |
| |
| if (!ifmgd->associated) |
| return; |
| |
| if (sdata->local->scanning) |
| return; |
| |
| /* Disregard subsequent beacons if we are already running a timer |
| processing a CSA */ |
| |
| if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED) |
| return; |
| |
| new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); |
| if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) |
| return; |
| |
| sdata->local->csa_channel = new_ch; |
| |
| if (sw_elem->count <= 1) { |
| ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
| } else { |
| ieee80211_stop_queues_by_reason(&sdata->local->hw, |
| IEEE80211_QUEUE_STOP_REASON_CSA); |
| ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; |
| mod_timer(&ifmgd->chswitch_timer, |
| jiffies + |
| msecs_to_jiffies(sw_elem->count * |
| bss->cbss.beacon_interval)); |
| } |
| } |
| |
| static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, |
| u16 capab_info, u8 *pwr_constr_elem, |
| u8 pwr_constr_elem_len) |
| { |
| struct ieee80211_conf *conf = &sdata->local->hw.conf; |
| |
| if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT)) |
| return; |
| |
| /* Power constraint IE length should be 1 octet */ |
| if (pwr_constr_elem_len != 1) |
| return; |
| |
| if ((*pwr_constr_elem <= conf->channel->max_power) && |
| (*pwr_constr_elem != sdata->local->power_constr_level)) { |
| sdata->local->power_constr_level = *pwr_constr_elem; |
| ieee80211_hw_config(sdata->local, 0); |
| } |
| } |
| |
| /* 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); |
| 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); |
| } |
| } |
| |
| /* 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; |
| |
| if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { |
| local->ps_sdata = NULL; |
| return; |
| } |
| |
| list_for_each_entry(sdata, &local->interfaces, list) { |
| if (!netif_running(sdata->dev)) |
| continue; |
| if (sdata->vif.type != NL80211_IFTYPE_STATION) |
| continue; |
| found = sdata; |
| count++; |
| } |
| |
| if (count == 1 && found->u.mgd.powersave && |
| found->u.mgd.associated && list_empty(&found->u.mgd.work_list) && |
| !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL | |
| IEEE80211_STA_CONNECTION_POLL))) { |
| s32 beaconint_us; |
| |
| if (latency < 0) |
| latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY); |
| |
| beaconint_us = ieee80211_tu_to_usec( |
| found->vif.bss_conf.beacon_int); |
| |
| if (beaconint_us > latency) { |
| local->ps_sdata = NULL; |
| } else { |
| u8 dtimper = found->vif.bss_conf.dtim_period; |
| int maxslp = 1; |
| |
| if (dtimper > 1) |
| maxslp = min_t(int, dtimper, |
| latency / beaconint_us); |
| |
| local->hw.conf.max_sleep_period = maxslp; |
| local->ps_sdata = found; |
| } |
| } else { |
| local->ps_sdata = NULL; |
| } |
| |
| ieee80211_change_ps(local); |
| } |
| |
| void ieee80211_dynamic_ps_disable_work(struct work_struct *work) |
| { |
| struct ieee80211_local *local = |
| container_of(work, struct ieee80211_local, |
| dynamic_ps_disable_work); |
| |
| if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
| local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
| ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
| } |
| |
| ieee80211_wake_queues_by_reason(&local->hw, |
| IEEE80211_QUEUE_STOP_REASON_PS); |
| } |
| |
| void ieee80211_dynamic_ps_enable_work(struct work_struct *work) |
| { |
| struct ieee80211_local *local = |
| container_of(work, struct ieee80211_local, |
| dynamic_ps_enable_work); |
| struct ieee80211_sub_if_data *sdata = local->ps_sdata; |
| |
| /* can only happen when PS was just disabled anyway */ |
| if (!sdata) |
| return; |
| |
| if (local->hw.conf.flags & IEEE80211_CONF_PS) |
| return; |
| |
| if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
| ieee80211_send_nullfunc(local, sdata, 1); |
| |
| local->hw.conf.flags |= IEEE80211_CONF_PS; |
| ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
| } |
| |
| void ieee80211_dynamic_ps_timer(unsigned long data) |
| { |
| struct ieee80211_local *local = (void *) data; |
| |
| if (local->quiescing || local->suspended) |
| return; |
| |
| ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); |
| } |
| |
| /* MLME */ |
| static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
| struct ieee80211_if_managed *ifmgd, |
| u8 *wmm_param, size_t wmm_param_len) |
| { |
| struct ieee80211_tx_queue_params params; |
| size_t left; |
| int count; |
| u8 *pos; |
| |
| if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) |
| return; |
| |
| if (!wmm_param) |
| return; |
| |
| if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
| return; |
| count = wmm_param[6] & 0x0f; |
| if (count == ifmgd->wmm_last_param_set) |
| return; |
| ifmgd->wmm_last_param_set = count; |
| |
| pos = wmm_param + 8; |
| left = wmm_param_len - 8; |
| |
| memset(¶ms, 0, sizeof(params)); |
| |
| local->wmm_acm = 0; |
| for (; left >= 4; left -= 4, pos += 4) { |
| int aci = (pos[0] >> 5) & 0x03; |
| int acm = (pos[0] >> 4) & 0x01; |
| int queue; |
| |
| switch (aci) { |
| case 1: /* AC_BK */ |
| queue = 3; |
| if (acm) |
| local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
| break; |
| case 2: /* AC_VI */ |
| queue = 1; |
| if (acm) |
| local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
| break; |
| case 3: /* AC_VO */ |
| queue = 0; |
| if (acm) |
| local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
| break; |
| case 0: /* AC_BE */ |
| default: |
| queue = 2; |
| if (acm) |
| local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
| 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); |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
| "cWmin=%d cWmax=%d txop=%d\n", |
| wiphy_name(local->hw.wiphy), queue, aci, acm, |
| params.aifs, params.cw_min, params.cw_max, params.txop); |
| #endif |
| if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx) |
| printk(KERN_DEBUG "%s: failed to set TX queue " |
| "parameters for queue %d\n", |
| wiphy_name(local->hw.wiphy), queue); |
| } |
| } |
| |
| 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 (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 ieee80211_mgd_work *wk, |
| u32 bss_info_changed) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_bss *bss = wk->bss; |
| |
| bss_info_changed |= BSS_CHANGED_ASSOC; |
| /* set timing information */ |
| sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval; |
| sdata->vif.bss_conf.timestamp = bss->cbss.tsf; |
| sdata->vif.bss_conf.dtim_period = bss->dtim_period; |
| |
| bss_info_changed |= BSS_CHANGED_BEACON_INT; |
| bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
| bss->cbss.capability, bss->has_erp_value, bss->erp_value); |
| |
| sdata->u.mgd.associated = bss; |
| sdata->u.mgd.old_associate_work = wk; |
| memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN); |
| |
| /* just to be sure */ |
| sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL | |
| IEEE80211_STA_BEACON_POLL); |
| |
| ieee80211_led_assoc(local, 1); |
| |
| sdata->vif.bss_conf.assoc = 1; |
| /* |
| * For now just always ask the driver to update the basic rateset |
| * when we have associated, we aren't checking whether it actually |
| * changed or not. |
| */ |
| bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
| |
| /* And the BSSID changed - we're associated now */ |
| bss_info_changed |= BSS_CHANGED_BSSID; |
| |
| ieee80211_bss_info_change_notify(sdata, bss_info_changed); |
| |
| mutex_lock(&local->iflist_mtx); |
| ieee80211_recalc_ps(local, -1); |
| mutex_unlock(&local->iflist_mtx); |
| |
| netif_tx_start_all_queues(sdata->dev); |
| netif_carrier_on(sdata->dev); |
| } |
| |
| static enum rx_mgmt_action __must_check |
| ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_mgd_work *wk) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| |
| wk->tries++; |
| if (wk->tries > IEEE80211_AUTH_MAX_TRIES) { |
| printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", |
| sdata->dev->name, wk->bss->cbss.bssid); |
| |
| /* |
| * Most likely AP is not in the range so remove the |
| * bss struct for that AP. |
| */ |
| cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss); |
| |
| /* |
| * We might have a pending scan which had no chance to run yet |
| * due to work needing to be done. Hence, queue the STAs work |
| * again for that. |
| */ |
| ieee80211_queue_work(&local->hw, &ifmgd->work); |
| return RX_MGMT_CFG80211_AUTH_TO; |
| } |
| |
| printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n", |
| sdata->dev->name, wk->bss->cbss.bssid, |
| wk->tries); |
| |
| /* |
| * 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, wk->ssid, wk->ssid_len, NULL, 0); |
| |
| wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; |
| run_again(ifmgd, wk->timeout); |
| |
| return RX_MGMT_NONE; |
| } |
| |
| |
| static enum rx_mgmt_action __must_check |
| ieee80211_authenticate(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_mgd_work *wk) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| |
| wk->tries++; |
| if (wk->tries > IEEE80211_AUTH_MAX_TRIES) { |
| printk(KERN_DEBUG "%s: authentication with AP %pM" |
| " timed out\n", |
| sdata->dev->name, wk->bss->cbss.bssid); |
| |
| /* |
| * Most likely AP is not in the range so remove the |
| * bss struct for that AP. |
| */ |
| cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss); |
| |
| /* |
| * We might have a pending scan which had no chance to run yet |
| * due to work needing to be done. Hence, queue the STAs work |
| * again for that. |
| */ |
| ieee80211_queue_work(&local->hw, &ifmgd->work); |
| return RX_MGMT_CFG80211_AUTH_TO; |
| } |
| |
| printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n", |
| sdata->dev->name, wk->bss->cbss.bssid, wk->tries); |
| |
| ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len, |
| wk->bss->cbss.bssid, NULL, 0, 0); |
| wk->auth_transaction = 2; |
| |
| wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; |
| run_again(ifmgd, wk->timeout); |
| |
| return RX_MGMT_NONE; |
| } |
| |
| static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
| bool deauth) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| struct sta_info *sta; |
| u32 changed = 0, config_changed = 0; |
| u8 bssid[ETH_ALEN]; |
| |
| ASSERT_MGD_MTX(ifmgd); |
| |
| if (WARN_ON(!ifmgd->associated)) |
| return; |
| |
| memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN); |
| |
| ifmgd->associated = NULL; |
| memset(ifmgd->bssid, 0, ETH_ALEN); |
| |
| if (deauth) { |
| kfree(ifmgd->old_associate_work); |
| ifmgd->old_associate_work = NULL; |
| } else { |
| struct ieee80211_mgd_work *wk = ifmgd->old_associate_work; |
| |
| wk->state = IEEE80211_MGD_STATE_IDLE; |
| list_add(&wk->list, &ifmgd->work_list); |
| } |
| |
| /* |
| * 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); |
| |
| rcu_read_lock(); |
| sta = sta_info_get(local, bssid); |
| if (sta) |
| ieee80211_sta_tear_down_BA_sessions(sta); |
| rcu_read_unlock(); |
| |
| changed |= ieee80211_reset_erp_info(sdata); |
| |
| ieee80211_led_assoc(local, 0); |
| changed |= BSS_CHANGED_ASSOC; |
| sdata->vif.bss_conf.assoc = false; |
| |
| ieee80211_set_wmm_default(sdata); |
| |
| ieee80211_recalc_idle(local); |
| |
| /* channel(_type) changes are handled by ieee80211_hw_config */ |
| local->oper_channel_type = NL80211_CHAN_NO_HT; |
| |
| /* on the next assoc, re-program HT parameters */ |
| sdata->ht_opmode_valid = false; |
| |
| local->power_constr_level = 0; |
| |
| del_timer_sync(&local->dynamic_ps_timer); |
| cancel_work_sync(&local->dynamic_ps_enable_work); |
| |
| if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
| local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
| config_changed |= IEEE80211_CONF_CHANGE_PS; |
| } |
| |
| ieee80211_hw_config(local, config_changed); |
| |
| /* And the BSSID changed -- not very interesting here */ |
| changed |= BSS_CHANGED_BSSID; |
| ieee80211_bss_info_change_notify(sdata, changed); |
| |
| rcu_read_lock(); |
| |
| sta = sta_info_get(local, bssid); |
| if (!sta) { |
| rcu_read_unlock(); |
| return; |
| } |
| |
| sta_info_unlink(&sta); |
| |
| rcu_read_unlock(); |
| |
| sta_info_destroy(sta); |
| } |
| |
| static enum rx_mgmt_action __must_check |
| ieee80211_associate(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_mgd_work *wk) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| |
| wk->tries++; |
| if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) { |
| printk(KERN_DEBUG "%s: association with AP %pM" |
| " timed out\n", |
| sdata->dev->name, wk->bss->cbss.bssid); |
| |
| /* |
| * Most likely AP is not in the range so remove the |
| * bss struct for that AP. |
| */ |
| cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss); |
| |
| /* |
| * We might have a pending scan which had no chance to run yet |
| * due to work needing to be done. Hence, queue the STAs work |
| * again for that. |
| */ |
| ieee80211_queue_work(&local->hw, &ifmgd->work); |
| return RX_MGMT_CFG80211_ASSOC_TO; |
| } |
| |
| printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n", |
| sdata->dev->name, wk->bss->cbss.bssid, wk->tries); |
| ieee80211_send_assoc(sdata, wk); |
| |
| wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; |
| run_again(ifmgd, wk->timeout); |
| |
| return RX_MGMT_NONE; |
| } |
| |
| 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; |
| |
| mod_timer(&sdata->u.mgd.conn_mon_timer, |
| round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); |
| } |
| |
| static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| const u8 *ssid; |
| |
| ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID); |
| ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid, |
| ssid + 2, ssid[1], NULL, 0); |
| |
| ifmgd->probe_send_count++; |
| ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT; |
| run_again(ifmgd, ifmgd->probe_timeout); |
| } |
| |
| static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, |
| bool beacon) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| bool already = false; |
| |
| if (!netif_running(sdata->dev)) |
| return; |
| |
| if (sdata->local->scanning) |
| return; |
| |
| mutex_lock(&ifmgd->mtx); |
| |
| if (!ifmgd->associated) |
| goto out; |
| |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| if (beacon && net_ratelimit()) |
| printk(KERN_DEBUG "%s: detected beacon loss from AP " |
| "- sending probe request\n", sdata->dev->name); |
| #endif |
| |
| /* |
| * The driver/our work has already reported this event or the |
| * connection monitoring has kicked in and we have already sent |
| * a probe request. Or maybe the AP died and the driver keeps |
| * reporting until we disassociate... |
| * |
| * In either case we have to ignore the current call to this |
| * function (except for setting the correct probe reason bit) |
| * because otherwise we would reset the timer every time and |
| * never check whether we received a probe response! |
| */ |
| if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
| IEEE80211_STA_CONNECTION_POLL)) |
| already = true; |
| |
| if (beacon) |
| ifmgd->flags |= IEEE80211_STA_BEACON_POLL; |
| else |
| ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; |
| |
| if (already) |
| goto out; |
| |
| mutex_lock(&sdata->local->iflist_mtx); |
| ieee80211_recalc_ps(sdata->local, -1); |
| mutex_unlock(&sdata->local->iflist_mtx); |
| |
| ifmgd->probe_send_count = 0; |
| ieee80211_mgd_probe_ap_send(sdata); |
| out: |
| mutex_unlock(&ifmgd->mtx); |
| } |
| |
| void ieee80211_beacon_loss_work(struct work_struct *work) |
| { |
| struct ieee80211_sub_if_data *sdata = |
| container_of(work, struct ieee80211_sub_if_data, |
| u.mgd.beacon_loss_work); |
| |
| ieee80211_mgd_probe_ap(sdata, true); |
| } |
| |
| void ieee80211_beacon_loss(struct ieee80211_vif *vif) |
| { |
| struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| |
| ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work); |
| } |
| EXPORT_SYMBOL(ieee80211_beacon_loss); |
| |
| static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_mgd_work *wk) |
| { |
| wk->state = IEEE80211_MGD_STATE_IDLE; |
| printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
| } |
| |
| |
| static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_mgd_work *wk, |
| struct ieee80211_mgmt *mgmt, |
| size_t len) |
| { |
| 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; |
| ieee80211_send_auth(sdata, 3, wk->auth_alg, |
| elems.challenge - 2, elems.challenge_len + 2, |
| wk->bss->cbss.bssid, |
| wk->key, wk->key_len, wk->key_idx); |
| wk->auth_transaction = 4; |
| } |
| |
| static enum rx_mgmt_action __must_check |
| ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_mgd_work *wk, |
| struct ieee80211_mgmt *mgmt, size_t len) |
| { |
| u16 auth_alg, auth_transaction, status_code; |
| |
| if (wk->state != IEEE80211_MGD_STATE_AUTH) |
| return RX_MGMT_NONE; |
| |
| if (len < 24 + 6) |
| return RX_MGMT_NONE; |
| |
| if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0) |
| return RX_MGMT_NONE; |
| |
| if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0) |
| 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 != wk->auth_alg || |
| auth_transaction != wk->auth_transaction) |
| return RX_MGMT_NONE; |
| |
| if (status_code != WLAN_STATUS_SUCCESS) { |
| list_del(&wk->list); |
| kfree(wk); |
| return RX_MGMT_CFG80211_AUTH; |
| } |
| |
| switch (wk->auth_alg) { |
| case WLAN_AUTH_OPEN: |
| case WLAN_AUTH_LEAP: |
| case WLAN_AUTH_FT: |
| ieee80211_auth_completed(sdata, wk); |
| return RX_MGMT_CFG80211_AUTH; |
| case WLAN_AUTH_SHARED_KEY: |
| if (wk->auth_transaction == 4) { |
| ieee80211_auth_completed(sdata, wk); |
| return RX_MGMT_CFG80211_AUTH; |
| } else |
| ieee80211_auth_challenge(sdata, wk, mgmt, len); |
| break; |
| } |
| |
| return RX_MGMT_NONE; |
| } |
| |
| |
| static enum rx_mgmt_action __must_check |
| ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_mgd_work *wk, |
| struct ieee80211_mgmt *mgmt, size_t len) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| const u8 *bssid = NULL; |
| u16 reason_code; |
| |
| if (len < 24 + 2) |
| return RX_MGMT_NONE; |
| |
| ASSERT_MGD_MTX(ifmgd); |
| |
| if (wk) |
| bssid = wk->bss->cbss.bssid; |
| else |
| bssid = ifmgd->associated->cbss.bssid; |
| |
| reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); |
| |
| printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n", |
| sdata->dev->name, bssid, reason_code); |
| |
| if (!wk) { |
| ieee80211_set_disassoc(sdata, true); |
| } else { |
| list_del(&wk->list); |
| kfree(wk); |
| } |
| |
| 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; |
| |
| if (len < 24 + 2) |
| return RX_MGMT_NONE; |
| |
| ASSERT_MGD_MTX(ifmgd); |
| |
| if (WARN_ON(!ifmgd->associated)) |
| return RX_MGMT_NONE; |
| |
| if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN))) |
| return RX_MGMT_NONE; |
| |
| reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); |
| |
| printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n", |
| sdata->dev->name, mgmt->sa, reason_code); |
| |
| ieee80211_set_disassoc(sdata, false); |
| return RX_MGMT_CFG80211_DISASSOC; |
| } |
| |
| |
| static enum rx_mgmt_action __must_check |
| ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_mgd_work *wk, |
| struct ieee80211_mgmt *mgmt, size_t len, |
| bool reassoc) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_supported_band *sband; |
| struct sta_info *sta; |
| u32 rates, basic_rates; |
| u16 capab_info, status_code, aid; |
| struct ieee802_11_elems elems; |
| struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
| u8 *pos; |
| u32 changed = 0; |
| int i, j; |
| bool have_higher_than_11mbit = false, newsta = false; |
| u16 ap_ht_cap_flags; |
| |
| /* |
| * AssocResp and ReassocResp have identical structure, so process both |
| * of them in this function. |
| */ |
| |
| if (len < 24 + 6) |
| return RX_MGMT_NONE; |
| |
| if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0) |
| return RX_MGMT_NONE; |
| |
| capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
| status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); |
| aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
| |
| printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " |
| "status=%d aid=%d)\n", |
| sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, |
| capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
| |
| pos = mgmt->u.assoc_resp.variable; |
| ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
| |
| if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && |
| elems.timeout_int && elems.timeout_int_len == 5 && |
| elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { |
| u32 tu, ms; |
| tu = get_unaligned_le32(elems.timeout_int + 1); |
| ms = tu * 1024 / 1000; |
| printk(KERN_DEBUG "%s: AP rejected association temporarily; " |
| "comeback duration %u TU (%u ms)\n", |
| sdata->dev->name, tu, ms); |
| wk->timeout = jiffies + msecs_to_jiffies(ms); |
| if (ms > IEEE80211_ASSOC_TIMEOUT) |
| run_again(ifmgd, jiffies + msecs_to_jiffies(ms)); |
| return RX_MGMT_NONE; |
| } |
| |
| if (status_code != WLAN_STATUS_SUCCESS) { |
| printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", |
| sdata->dev->name, status_code); |
| list_del(&wk->list); |
| kfree(wk); |
| return RX_MGMT_CFG80211_ASSOC; |
| } |
| |
| if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
| printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " |
| "set\n", sdata->dev->name, aid); |
| aid &= ~(BIT(15) | BIT(14)); |
| |
| if (!elems.supp_rates) { |
| printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", |
| sdata->dev->name); |
| return RX_MGMT_NONE; |
| } |
| |
| printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
| ifmgd->aid = aid; |
| |
| rcu_read_lock(); |
| |
| /* Add STA entry for the AP */ |
| sta = sta_info_get(local, wk->bss->cbss.bssid); |
| if (!sta) { |
| newsta = true; |
| |
| rcu_read_unlock(); |
| |
| sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL); |
| if (!sta) { |
| printk(KERN_DEBUG "%s: failed to alloc STA entry for" |
| " the AP\n", sdata->dev->name); |
| return RX_MGMT_NONE; |
| } |
| |
| set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | |
| WLAN_STA_ASSOC_AP); |
| if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) |
| set_sta_flags(sta, WLAN_STA_AUTHORIZED); |
| |
| rcu_read_lock(); |
| } |
| |
| rates = 0; |
| basic_rates = 0; |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| |
| for (i = 0; i < elems.supp_rates_len; i++) { |
| int rate = (elems.supp_rates[i] & 0x7f) * 5; |
| bool is_basic = !!(elems.supp_rates[i] & 0x80); |
| |
| if (rate > 110) |
| have_higher_than_11mbit = true; |
| |
| for (j = 0; j < sband->n_bitrates; j++) { |
| if (sband->bitrates[j].bitrate == rate) { |
| rates |= BIT(j); |
| if (is_basic) |
| basic_rates |= BIT(j); |
| break; |
| } |
| } |
| } |
| |
| for (i = 0; i < elems.ext_supp_rates_len; i++) { |
| int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; |
| bool is_basic = !!(elems.ext_supp_rates[i] & 0x80); |
| |
| if (rate > 110) |
| have_higher_than_11mbit = true; |
| |
| for (j = 0; j < sband->n_bitrates; j++) { |
| if (sband->bitrates[j].bitrate == rate) { |
| rates |= BIT(j); |
| if (is_basic) |
| basic_rates |= BIT(j); |
| break; |
| } |
| } |
| } |
| |
| sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
| sdata->vif.bss_conf.basic_rates = basic_rates; |
| |
| /* cf. IEEE 802.11 9.2.12 */ |
| if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && |
| have_higher_than_11mbit) |
| sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
| else |
| sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; |
| |
| if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
| ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
| elems.ht_cap_elem, &sta->sta.ht_cap); |
| |
| ap_ht_cap_flags = sta->sta.ht_cap.cap; |
| |
| rate_control_rate_init(sta); |
| |
| if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
| set_sta_flags(sta, WLAN_STA_MFP); |
| |
| if (elems.wmm_param) |
| set_sta_flags(sta, WLAN_STA_WME); |
| |
| if (newsta) { |
| int err = sta_info_insert(sta); |
| if (err) { |
| printk(KERN_DEBUG "%s: failed to insert STA entry for" |
| " the AP (error %d)\n", sdata->dev->name, err); |
| rcu_read_unlock(); |
| return RX_MGMT_NONE; |
| } |
| } |
| |
| rcu_read_unlock(); |
| |
| if (elems.wmm_param) |
| ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
| elems.wmm_param_len); |
| else |
| ieee80211_set_wmm_default(sdata); |
| |
| if (elems.ht_info_elem && elems.wmm_param && |
| (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
| !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
| changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
| wk->bss->cbss.bssid, |
| ap_ht_cap_flags); |
| |
| /* delete work item -- must be before set_associated for PS */ |
| list_del(&wk->list); |
| |
| /* set AID and assoc capability, |
| * ieee80211_set_associated() will tell the driver */ |
| bss_conf->aid = aid; |
| bss_conf->assoc_capability = capab_info; |
| /* this will take ownership of wk */ |
| ieee80211_set_associated(sdata, wk, changed); |
| |
| /* |
| * 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); |
| mod_beacon_timer(sdata); |
| |
| return RX_MGMT_CFG80211_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; |
| |
| if (elems->ds_params && elems->ds_params_len == 1) |
| freq = ieee80211_channel_to_frequency(elems->ds_params[0]); |
| 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 (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
| (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid, |
| ETH_ALEN) == 0)) { |
| struct ieee80211_channel_sw_ie *sw_elem = |
| (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; |
| ieee80211_sta_process_chanswitch(sdata, sw_elem, bss); |
| } |
| } |
| |
| |
| static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_mgd_work *wk, |
| struct ieee80211_mgmt *mgmt, size_t len, |
| struct ieee80211_rx_status *rx_status) |
| { |
| struct ieee80211_if_managed *ifmgd; |
| size_t baselen; |
| struct ieee802_11_elems elems; |
| |
| ifmgd = &sdata->u.mgd; |
| |
| ASSERT_MGD_MTX(ifmgd); |
| |
| if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
| 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); |
| |
| /* direct probe may be part of the association flow */ |
| if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) { |
| printk(KERN_DEBUG "%s: direct probe responded\n", |
| sdata->dev->name); |
| wk->tries = 0; |
| wk->state = IEEE80211_MGD_STATE_AUTH; |
| WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE); |
| } |
| |
| if (ifmgd->associated && |
| memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 && |
| ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
| IEEE80211_STA_CONNECTION_POLL)) { |
| ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | |
| IEEE80211_STA_BEACON_POLL); |
| mutex_lock(&sdata->local->iflist_mtx); |
| ieee80211_recalc_ps(sdata->local, -1); |
| mutex_unlock(&sdata->local->iflist_mtx); |
| /* |
| * 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. |
| */ |
| mod_beacon_timer(sdata); |
| mod_timer(&ifmgd->conn_mon_timer, |
| round_jiffies_up(jiffies + |
| IEEE80211_CONNECTION_IDLE_TIME)); |
| } |
| } |
| |
| /* |
| * This is the canonical list of information elements we care about, |
| * the filter code also gives us all changes to the Microsoft OUI |
| * (00:50:F2) vendor IE which is used for WMM which we need to track. |
| * |
| * We implement beacon filtering in software since that means we can |
| * avoid processing the frame here and in cfg80211, and userspace |
| * will not be able to tell whether the hardware supports it or not. |
| * |
| * XXX: This list needs to be dynamic -- userspace needs to be able to |
| * add items it requires. It also needs to be able to tell us to |
| * look out for other vendor IEs. |
| */ |
| static const u64 care_about_ies = |
| (1ULL << WLAN_EID_COUNTRY) | |
| (1ULL << WLAN_EID_ERP_INFO) | |
| (1ULL << WLAN_EID_CHANNEL_SWITCH) | |
| (1ULL << WLAN_EID_PWR_CONSTRAINT) | |
| (1ULL << WLAN_EID_HT_CAPABILITY) | |
| (1ULL << WLAN_EID_HT_INFORMATION); |
| |
| static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_mgmt *mgmt, |
| size_t len, |
| struct ieee80211_rx_status *rx_status) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| size_t baselen; |
| struct ieee802_11_elems elems; |
| struct ieee80211_local *local = sdata->local; |
| u32 changed = 0; |
| bool erp_valid, directed_tim = false; |
| u8 erp_value = 0; |
| u32 ncrc; |
| u8 *bssid; |
| |
| ASSERT_MGD_MTX(ifmgd); |
| |
| /* Process beacon from the current BSS */ |
| baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; |
| if (baselen > len) |
| return; |
| |
| if (rx_status->freq != local->hw.conf.channel->center_freq) |
| return; |
| |
| /* |
| * We might have received a number of frames, among them a |
| * disassoc frame and a beacon... |
| */ |
| if (!ifmgd->associated) |
| return; |
| |
| bssid = ifmgd->associated->cbss.bssid; |
| |
| /* |
| * And in theory even frames from a different AP we were just |
| * associated to a split-second ago! |
| */ |
| if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0) |
| return; |
| |
| if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) { |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| if (net_ratelimit()) { |
| printk(KERN_DEBUG "%s: cancelling probereq poll due " |
| "to a received beacon\n", sdata->dev->name); |
| } |
| #endif |
| ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL; |
| mutex_lock(&local->iflist_mtx); |
| ieee80211_recalc_ps(local, -1); |
| mutex_unlock(&local->iflist_mtx); |
| } |
| |
| /* |
| * Push the beacon loss detection into the future since |
| * we are processing a beacon from the AP just now. |
| */ |
| mod_beacon_timer(sdata); |
| |
| ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
| ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, |
| len - baselen, &elems, |
| care_about_ies, ncrc); |
| |
| if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
| directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len, |
| ifmgd->aid); |
| |
| if (ncrc != ifmgd->beacon_crc) { |
| ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, |
| true); |
| |
| ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
| elems.wmm_param_len); |
| } |
| |
| if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
| if (directed_tim) { |
| if (local->hw.conf.dynamic_ps_timeout > 0) { |
| local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
| ieee80211_hw_config(local, |
| IEEE80211_CONF_CHANGE_PS); |
| ieee80211_send_nullfunc(local, sdata, 0); |
| } else { |
| local->pspolling = true; |
| |
| /* |
| * Here is assumed that the driver will be |
| * able to send ps-poll frame and receive a |
| * response even though power save mode is |
| * enabled, but some drivers might require |
| * to disable power save here. This needs |
| * to be investigated. |
| */ |
| ieee80211_send_pspoll(local, sdata); |
| } |
| } |
| } |
| |
| if (ncrc == ifmgd->beacon_crc) |
| return; |
| ifmgd->beacon_crc = ncrc; |
| |
| if (elems.erp_info && elems.erp_info_len >= 1) { |
| erp_valid = true; |
| erp_value = elems.erp_info[0]; |
| } else { |
| erp_valid = false; |
| } |
| changed |= ieee80211_handle_bss_capability(sdata, |
| le16_to_cpu(mgmt->u.beacon.capab_info), |
| erp_valid, erp_value); |
| |
| |
| if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
| !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) { |
| struct sta_info *sta; |
| struct ieee80211_supported_band *sband; |
| u16 ap_ht_cap_flags; |
| |
| rcu_read_lock(); |
| |
| sta = sta_info_get(local, bssid); |
| if (WARN_ON(!sta)) { |
| rcu_read_unlock(); |
| return; |
| } |
| |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| |
| ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
| elems.ht_cap_elem, &sta->sta.ht_cap); |
| |
| ap_ht_cap_flags = sta->sta.ht_cap.cap; |
| |
| rcu_read_unlock(); |
| |
| changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
| bssid, ap_ht_cap_flags); |
| } |
| |
| /* Note: country IE parsing is done for us by cfg80211 */ |
| if (elems.country_elem) { |
| /* TODO: IBSS also needs this */ |
| if (elems.pwr_constr_elem) |
| ieee80211_handle_pwr_constr(sdata, |
| le16_to_cpu(mgmt->u.probe_resp.capab_info), |
| elems.pwr_constr_elem, |
| elems.pwr_constr_elem_len); |
| } |
| |
| ieee80211_bss_info_change_notify(sdata, changed); |
| } |
| |
| ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, |
| struct sk_buff *skb) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_mgmt *mgmt; |
| u16 fc; |
| |
| if (skb->len < 24) |
| return RX_DROP_MONITOR; |
| |
| mgmt = (struct ieee80211_mgmt *) skb->data; |
| fc = le16_to_cpu(mgmt->frame_control); |
| |
| switch (fc & IEEE80211_FCTL_STYPE) { |
| case IEEE80211_STYPE_PROBE_REQ: |
| case IEEE80211_STYPE_PROBE_RESP: |
| case IEEE80211_STYPE_BEACON: |
| case IEEE80211_STYPE_AUTH: |
| case IEEE80211_STYPE_ASSOC_RESP: |
| case IEEE80211_STYPE_REASSOC_RESP: |
| case IEEE80211_STYPE_DEAUTH: |
| case IEEE80211_STYPE_DISASSOC: |
| case IEEE80211_STYPE_ACTION: |
| skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
| ieee80211_queue_work(&local->hw, &sdata->u.mgd.work); |
| return RX_QUEUED; |
| } |
| |
| return RX_DROP_MONITOR; |
| } |
| |
| static 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 ieee80211_mgd_work *wk; |
| 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); |
| |
| if (ifmgd->associated && |
| memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid, |
| ETH_ALEN) == 0) { |
| 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, NULL, mgmt, |
| skb->len, rx_status); |
| break; |
| case IEEE80211_STYPE_DEAUTH: |
| rma = ieee80211_rx_mgmt_deauth(sdata, NULL, |
| mgmt, skb->len); |
| break; |
| case IEEE80211_STYPE_DISASSOC: |
| rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); |
| break; |
| case IEEE80211_STYPE_ACTION: |
| /* XXX: differentiate, can only happen for CSA now! */ |
| ieee80211_sta_process_chanswitch(sdata, |
| &mgmt->u.action.u.chan_switch.sw_elem, |
| ifmgd->associated); |
| 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; |
| default: |
| WARN(1, "unexpected: %d", rma); |
| } |
| goto out; |
| } |
| |
| list_for_each_entry(wk, &ifmgd->work_list, list) { |
| if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0) |
| continue; |
| |
| switch (fc & IEEE80211_FCTL_STYPE) { |
| case IEEE80211_STYPE_PROBE_RESP: |
| ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len, |
| rx_status); |
| break; |
| case IEEE80211_STYPE_AUTH: |
| rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len); |
| break; |
| case IEEE80211_STYPE_ASSOC_RESP: |
| rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt, |
| skb->len, false); |
| break; |
| case IEEE80211_STYPE_REASSOC_RESP: |
| rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt, |
| skb->len, true); |
| break; |
| case IEEE80211_STYPE_DEAUTH: |
| rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt, |
| skb->len); |
| break; |
| } |
| /* |
| * We've processed this frame for that work, so it can't |
| * belong to another work struct. |
| * NB: this is also required for correctness because the |
| * called functions can free 'wk', and for 'rma'! |
| */ |
| break; |
| } |
| |
| mutex_unlock(&ifmgd->mtx); |
| |
| switch (rma) { |
| case RX_MGMT_NONE: |
| /* no action */ |
| break; |
| case RX_MGMT_CFG80211_AUTH: |
| cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len); |
| break; |
| case RX_MGMT_CFG80211_ASSOC: |
| cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len); |
| break; |
| case RX_MGMT_CFG80211_DEAUTH: |
| cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
| break; |
| default: |
| WARN(1, "unexpected: %d", rma); |
| } |
| |
| out: |
| kfree_skb(skb); |
| } |
| |
| 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, &ifmgd->work); |
| } |
| |
| static void ieee80211_sta_work(struct work_struct *work) |
| { |
| struct ieee80211_sub_if_data *sdata = |
| container_of(work, struct ieee80211_sub_if_data, u.mgd.work); |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_if_managed *ifmgd; |
| struct sk_buff *skb; |
| struct ieee80211_mgd_work *wk, *tmp; |
| LIST_HEAD(free_work); |
| enum rx_mgmt_action rma; |
| bool anybusy = false; |
| |
| if (!netif_running(sdata->dev)) |
| return; |
| |
| if (local->scanning) |
| return; |
| |
| if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
| return; |
| |
| /* |
| * ieee80211_queue_work() should have picked up most cases, |
| * here we'll pick the the rest. |
| */ |
| if (WARN(local->suspended, "STA MLME work scheduled while " |
| "going to suspend\n")) |
| return; |
| |
| ifmgd = &sdata->u.mgd; |
| |
| /* first process frames to avoid timing out while a frame is pending */ |
| while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
| ieee80211_sta_rx_queued_mgmt(sdata, skb); |
| |
| /* then process the rest of the work */ |
| mutex_lock(&ifmgd->mtx); |
| |
| if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
| IEEE80211_STA_CONNECTION_POLL) && |
| ifmgd->associated) { |
| u8 bssid[ETH_ALEN]; |
| |
| memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN); |
| if (time_is_after_jiffies(ifmgd->probe_timeout)) |
| run_again(ifmgd, ifmgd->probe_timeout); |
| |
| else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) { |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| printk(KERN_DEBUG "No probe response from AP %pM" |
| " after %dms, try %d\n", bssid, |
| (1000 * IEEE80211_PROBE_WAIT)/HZ, |
| ifmgd->probe_send_count); |
| #endif |
| ieee80211_mgd_probe_ap_send(sdata); |
| } else { |
| /* |
| * We actually lost the connection ... or did we? |
| * Let's make sure! |
| */ |
| ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | |
| IEEE80211_STA_BEACON_POLL); |
| printk(KERN_DEBUG "No probe response from AP %pM" |
| " after %dms, disconnecting.\n", |
| bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ); |
| ieee80211_set_disassoc(sdata, true); |
| mutex_unlock(&ifmgd->mtx); |
| /* |
| * must be outside lock due to cfg80211, |
| * but that's not a problem. |
| */ |
| ieee80211_send_deauth_disassoc(sdata, bssid, |
| IEEE80211_STYPE_DEAUTH, |
| WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, |
| NULL); |
| mutex_lock(&ifmgd->mtx); |
| } |
| } |
| |
| |
| ieee80211_recalc_idle(local); |
| |
| list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) { |
| if (time_is_after_jiffies(wk->timeout)) { |
| /* |
| * This work item isn't supposed to be worked on |
| * right now, but take care to adjust the timer |
| * properly. |
| */ |
| run_again(ifmgd, wk->timeout); |
| continue; |
| } |
| |
| switch (wk->state) { |
| default: |
| WARN_ON(1); |
| /* fall through */ |
| case IEEE80211_MGD_STATE_IDLE: |
| /* nothing */ |
| rma = RX_MGMT_NONE; |
| break; |
| case IEEE80211_MGD_STATE_PROBE: |
| rma = ieee80211_direct_probe(sdata, wk); |
| break; |
| case IEEE80211_MGD_STATE_AUTH: |
| rma = ieee80211_authenticate(sdata, wk); |
| break; |
| case IEEE80211_MGD_STATE_ASSOC: |
| rma = ieee80211_associate(sdata, wk); |
| break; |
| } |
| |
| switch (rma) { |
| case RX_MGMT_NONE: |
| /* no action required */ |
| break; |
| case RX_MGMT_CFG80211_AUTH_TO: |
| case RX_MGMT_CFG80211_ASSOC_TO: |
| list_del(&wk->list); |
| list_add(&wk->list, &free_work); |
| wk->tries = rma; /* small abuse but only local */ |
| break; |
| default: |
| WARN(1, "unexpected: %d", rma); |
| } |
| } |
| |
| list_for_each_entry(wk, &ifmgd->work_list, list) { |
| if (wk->state != IEEE80211_MGD_STATE_IDLE) { |
| anybusy = true; |
| break; |
| } |
| } |
| if (!anybusy && |
| test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) |
| ieee80211_queue_delayed_work(&local->hw, |
| &local->scan_work, |
| round_jiffies_relative(0)); |
| |
| mutex_unlock(&ifmgd->mtx); |
| |
| list_for_each_entry_safe(wk, tmp, &free_work, list) { |
| switch (wk->tries) { |
| case RX_MGMT_CFG80211_AUTH_TO: |
| cfg80211_send_auth_timeout(sdata->dev, |
| wk->bss->cbss.bssid); |
| break; |
| case RX_MGMT_CFG80211_ASSOC_TO: |
| cfg80211_send_assoc_timeout(sdata->dev, |
| wk->bss->cbss.bssid); |
| break; |
| default: |
| WARN(1, "unexpected: %d", wk->tries); |
| } |
| |
| list_del(&wk->list); |
| kfree(wk); |
| } |
| |
| ieee80211_recalc_idle(local); |
| } |
| |
| 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_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) |
| { |
| if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
| sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL | |
| IEEE80211_STA_CONNECTION_POLL); |
| |
| /* let's probe the connection once */ |
| 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->u.mgd.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->work); |
| cancel_work_sync(&ifmgd->beacon_loss_work); |
| if (del_timer_sync(&ifmgd->timer)) |
| set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); |
| |
| cancel_work_sync(&ifmgd->chswitch_work); |
| if (del_timer_sync(&ifmgd->chswitch_timer)) |
| set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); |
| |
| cancel_work_sync(&ifmgd->monitor_work); |
| /* 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 (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); |
| } |
| #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->work, ieee80211_sta_work); |
| INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); |
| INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); |
| INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_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); |
| skb_queue_head_init(&ifmgd->skb_queue); |
| |
| INIT_LIST_HEAD(&ifmgd->work_list); |
| |
| ifmgd->capab = WLAN_CAPABILITY_ESS; |
| ifmgd->flags = 0; |
| if (sdata->local->hw.queues >= 4) |
| ifmgd->flags |= IEEE80211_STA_WMM_ENABLED; |
| |
| mutex_init(&ifmgd->mtx); |
| } |
| |
| /* scan finished notification */ |
| void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) |
| { |
| struct ieee80211_sub_if_data *sdata = local->scan_sdata; |
| |
| /* Restart STA timers */ |
| rcu_read_lock(); |
| list_for_each_entry_rcu(sdata, &local->interfaces, list) |
| ieee80211_restart_sta_timer(sdata); |
| rcu_read_unlock(); |
| } |
| |
| int ieee80211_max_network_latency(struct notifier_block *nb, |
| unsigned long data, void *dummy) |
| { |
| s32 latency_usec = (s32) data; |
| struct ieee80211_local *local = |
| container_of(nb, struct ieee80211_local, |
| network_latency_notifier); |
| |
| mutex_lock(&local->iflist_mtx); |
| ieee80211_recalc_ps(local, latency_usec); |
| mutex_unlock(&local->iflist_mtx); |
| |
| return 0; |
| } |
| |
| /* config hooks */ |
| int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, |
| struct cfg80211_auth_request *req) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| const u8 *ssid; |
| struct ieee80211_mgd_work *wk; |
| u16 auth_alg; |
| |
| switch (req->auth_type) { |
| case NL80211_AUTHTYPE_OPEN_SYSTEM: |
| auth_alg = WLAN_AUTH_OPEN; |
| break; |
| case NL80211_AUTHTYPE_SHARED_KEY: |
| auth_alg = WLAN_AUTH_SHARED_KEY; |
| break; |
| case NL80211_AUTHTYPE_FT: |
| auth_alg = WLAN_AUTH_FT; |
| break; |
| case NL80211_AUTHTYPE_NETWORK_EAP: |
| auth_alg = WLAN_AUTH_LEAP; |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| |
| wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL); |
| if (!wk) |
| return -ENOMEM; |
| |
| wk->bss = (void *)req->bss; |
| |
| if (req->ie && req->ie_len) { |
| memcpy(wk->ie, req->ie, req->ie_len); |
| wk->ie_len = req->ie_len; |
| } |
| |
| if (req->key && req->key_len) { |
| wk->key_len = req->key_len; |
| wk->key_idx = req->key_idx; |
| memcpy(wk->key, req->key, req->key_len); |
| } |
| |
| ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
| memcpy(wk->ssid, ssid + 2, ssid[1]); |
| wk->ssid_len = ssid[1]; |
| |
| wk->state = IEEE80211_MGD_STATE_PROBE; |
| wk->auth_alg = auth_alg; |
| wk->timeout = jiffies; /* run right away */ |
| |
| /* |
| * XXX: if still associated need to tell AP that we're going |
| * to sleep and then change channel etc. |
| */ |
| sdata->local->oper_channel = req->bss->channel; |
| ieee80211_hw_config(sdata->local, 0); |
| |
| mutex_lock(&ifmgd->mtx); |
| list_add(&wk->list, &sdata->u.mgd.work_list); |
| mutex_unlock(&ifmgd->mtx); |
| |
| ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work); |
| return 0; |
| } |
| |
| int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, |
| struct cfg80211_assoc_request *req) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_mgd_work *wk, *found = NULL; |
| int i, err; |
| |
| mutex_lock(&ifmgd->mtx); |
| |
| list_for_each_entry(wk, &ifmgd->work_list, list) { |
| if (&wk->bss->cbss == req->bss && |
| wk->state == IEEE80211_MGD_STATE_IDLE) { |
| found = wk; |
| break; |
| } |
| } |
| |
| if (!found) { |
| err = -ENOLINK; |
| goto out; |
| } |
| |
| list_del(&found->list); |
| |
| wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL); |
| if (!wk) { |
| list_add(&found->list, &ifmgd->work_list); |
| err = -ENOMEM; |
| goto out; |
| } |
| |
| list_add(&wk->list, &ifmgd->work_list); |
| |
| ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N; |
| |
| for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) |
| if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || |
| req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || |
| req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) |
| ifmgd->flags |= IEEE80211_STA_DISABLE_11N; |
| |
| sdata->local->oper_channel = req->bss->channel; |
| ieee80211_hw_config(sdata->local, 0); |
| |
| if (req->ie && req->ie_len) { |
| memcpy(wk->ie, req->ie, req->ie_len); |
| wk->ie_len = req->ie_len; |
| } else |
| wk->ie_len = 0; |
| |
| if (req->prev_bssid) |
| memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN); |
| |
| wk->state = IEEE80211_MGD_STATE_ASSOC; |
| wk->tries = 0; |
| wk->timeout = jiffies; /* run right away */ |
| |
| 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; |
| |
| ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work); |
| |
| err = 0; |
| |
| out: |
| mutex_unlock(&ifmgd->mtx); |
| return err; |
| } |
| |
| int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, |
| struct cfg80211_deauth_request *req, |
| void *cookie) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_mgd_work *wk; |
| const u8 *bssid = NULL; |
| |
| mutex_lock(&ifmgd->mtx); |
| |
| if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) { |
| bssid = req->bss->bssid; |
| ieee80211_set_disassoc(sdata, true); |
| } else list_for_each_entry(wk, &ifmgd->work_list, list) { |
| if (&wk->bss->cbss == req->bss) { |
| bssid = req->bss->bssid; |
| list_del(&wk->list); |
| kfree(wk); |
| break; |
| } |
| } |
| |
| /* |
| * cfg80211 should catch this ... but it's racy since |
| * we can receive a deauth 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 (!bssid) { |
| mutex_unlock(&ifmgd->mtx); |
| return -ENOLINK; |
| } |
| |
| mutex_unlock(&ifmgd->mtx); |
| |
| printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n", |
| sdata->dev->name, bssid, req->reason_code); |
| |
| ieee80211_send_deauth_disassoc(sdata, bssid, |
| IEEE80211_STYPE_DEAUTH, req->reason_code, |
| cookie); |
| |
| return 0; |
| } |
| |
| int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, |
| struct cfg80211_disassoc_request *req, |
| void *cookie) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| |
| 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->cbss != req->bss) { |
| mutex_unlock(&ifmgd->mtx); |
| return -ENOLINK; |
| } |
| |
| printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n", |
| sdata->dev->name, req->bss->bssid, req->reason_code); |
| |
| ieee80211_set_disassoc(sdata, false); |
| |
| mutex_unlock(&ifmgd->mtx); |
| |
| ieee80211_send_deauth_disassoc(sdata, req->bss->bssid, |
| IEEE80211_STYPE_DISASSOC, req->reason_code, |
| cookie); |
| return 0; |
| } |