| /* |
| * 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_ASSOC_SCANS_MAX_TRIES 2 |
| #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_MONITORING_INTERVAL (2 * HZ) |
| #define IEEE80211_PROBE_WAIT (HZ / 5) |
| #define IEEE80211_PROBE_IDLE_TIME (60 * HZ) |
| #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) |
| |
| #define TMR_RUNNING_TIMER 0 |
| #define TMR_RUNNING_CHANSW 1 |
| |
| /* utils */ |
| static int ecw2cw(int ecw) |
| { |
| return (1 << ecw) - 1; |
| } |
| |
| static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie) |
| { |
| u8 *end, *pos; |
| |
| pos = bss->cbss.information_elements; |
| if (pos == NULL) |
| return NULL; |
| end = pos + bss->cbss.len_information_elements; |
| |
| while (pos + 1 < end) { |
| if (pos + 2 + pos[1] > end) |
| break; |
| if (pos[0] == ie) |
| return pos; |
| pos += 2 + pos[1]; |
| } |
| |
| return NULL; |
| } |
| |
| 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, |
| u16 ap_ht_cap_flags) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_supported_band *sband; |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 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, ifmgd->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_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| u8 *pos, *ies, *ht_ie; |
| int i, len, count, rates_len, supp_rates_len; |
| u16 capab; |
| struct ieee80211_bss *bss; |
| int wmm = 0; |
| struct ieee80211_supported_band *sband; |
| u32 rates = 0; |
| |
| skb = dev_alloc_skb(local->hw.extra_tx_headroom + |
| sizeof(*mgmt) + 200 + ifmgd->extra_ie_len + |
| ifmgd->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; |
| } |
| |
| bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
| local->hw.conf.channel->center_freq, |
| ifmgd->ssid, ifmgd->ssid_len); |
| if (bss) { |
| if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY) |
| capab |= WLAN_CAPABILITY_PRIVACY; |
| if (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(bss, sband, &rates); |
| |
| if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
| (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) |
| capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; |
| |
| ieee80211_rx_bss_put(local, bss); |
| } else { |
| rates = ~0; |
| rates_len = sband->n_bitrates; |
| } |
| |
| mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| memset(mgmt, 0, 24); |
| memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
| memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
| memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
| |
| if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) { |
| 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, ifmgd->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 + ifmgd->ssid_len); |
| *pos++ = WLAN_EID_SSID; |
| *pos++ = ifmgd->ssid_len; |
| memcpy(pos, ifmgd->ssid, ifmgd->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 (ifmgd->extra_ie) { |
| pos = skb_put(skb, ifmgd->extra_ie_len); |
| memcpy(pos, ifmgd->extra_ie, ifmgd->extra_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(bss, WLAN_EID_HT_INFORMATION)) && |
| ht_ie[1] >= sizeof(struct ieee80211_ht_info) && |
| (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) { |
| 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)); |
| } |
| |
| kfree(ifmgd->assocreq_ies); |
| ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies; |
| ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL); |
| if (ifmgd->assocreq_ies) |
| memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len); |
| |
| ieee80211_tx_skb(sdata, skb, 0); |
| } |
| |
| |
| static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
| u16 stype, u16 reason) |
| { |
| 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, ifmgd->bssid, ETH_ALEN); |
| memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
| memcpy(mgmt->bssid, ifmgd->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) |
| cfg80211_send_deauth(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_bss *bss; |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| |
| if (!netif_running(sdata->dev)) |
| return; |
| |
| bss = ieee80211_rx_bss_get(sdata->local, ifmgd->bssid, |
| sdata->local->hw.conf.channel->center_freq, |
| ifmgd->ssid, ifmgd->ssid_len); |
| if (!bss) |
| goto exit; |
| |
| sdata->local->oper_channel = sdata->local->csa_channel; |
| /* XXX: shouldn't really modify cfg80211-owned data! */ |
| if (!ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL)) |
| bss->cbss.channel = sdata->local->oper_channel; |
| |
| ieee80211_rx_bss_put(sdata->local, bss); |
| exit: |
| ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; |
| ieee80211_wake_queues_by_reason(&sdata->local->hw, |
| IEEE80211_QUEUE_STOP_REASON_CSA); |
| } |
| |
| 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; |
| } |
| |
| queue_work(sdata->local->hw.workqueue, &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); |
| |
| if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATED) |
| return; |
| |
| if (sdata->local->sw_scanning || sdata->local->hw_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) { |
| queue_work(sdata->local->hw.workqueue, &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->hw_scanning || local->sw_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.flags & IEEE80211_STA_ASSOCIATED) && |
| !(found->u.mgd.flags & IEEE80211_STA_PROBEREQ_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) |
| return; |
| |
| queue_work(local->hw.workqueue, &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; |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| #endif |
| 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) { |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| if (net_ratelimit()) { |
| printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n", |
| sdata->dev->name, |
| use_protection ? "enabled" : "disabled", |
| ifmgd->bssid); |
| } |
| #endif |
| bss_conf->use_cts_prot = use_protection; |
| changed |= BSS_CHANGED_ERP_CTS_PROT; |
| } |
| |
| if (use_short_preamble != bss_conf->use_short_preamble) { |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| if (net_ratelimit()) { |
| printk(KERN_DEBUG "%s: switched to %s barker preamble" |
| " (BSSID=%pM)\n", |
| sdata->dev->name, |
| use_short_preamble ? "short" : "long", |
| ifmgd->bssid); |
| } |
| #endif |
| bss_conf->use_short_preamble = use_short_preamble; |
| changed |= BSS_CHANGED_ERP_PREAMBLE; |
| } |
| |
| if (use_short_slot != bss_conf->use_short_slot) { |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| if (net_ratelimit()) { |
| printk(KERN_DEBUG "%s: switched to %s slot time" |
| " (BSSID=%pM)\n", |
| sdata->dev->name, |
| use_short_slot ? "short" : "long", |
| ifmgd->bssid); |
| } |
| #endif |
| bss_conf->use_short_slot = use_short_slot; |
| changed |= BSS_CHANGED_ERP_SLOT; |
| } |
| |
| return changed; |
| } |
| |
| static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata) |
| { |
| union iwreq_data wrqu; |
| |
| memset(&wrqu, 0, sizeof(wrqu)); |
| if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED) |
| memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN); |
| wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
| wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); |
| } |
| |
| static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| char *buf; |
| size_t len; |
| int i; |
| union iwreq_data wrqu; |
| |
| if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies) |
| return; |
| |
| buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len + |
| ifmgd->assocresp_ies_len), GFP_KERNEL); |
| if (!buf) |
| return; |
| |
| len = sprintf(buf, "ASSOCINFO("); |
| if (ifmgd->assocreq_ies) { |
| len += sprintf(buf + len, "ReqIEs="); |
| for (i = 0; i < ifmgd->assocreq_ies_len; i++) { |
| len += sprintf(buf + len, "%02x", |
| ifmgd->assocreq_ies[i]); |
| } |
| } |
| if (ifmgd->assocresp_ies) { |
| if (ifmgd->assocreq_ies) |
| len += sprintf(buf + len, " "); |
| len += sprintf(buf + len, "RespIEs="); |
| for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
| len += sprintf(buf + len, "%02x", |
| ifmgd->assocresp_ies[i]); |
| } |
| } |
| len += sprintf(buf + len, ")"); |
| |
| if (len > IW_CUSTOM_MAX) { |
| len = sprintf(buf, "ASSOCRESPIE="); |
| for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
| len += sprintf(buf + len, "%02x", |
| ifmgd->assocresp_ies[i]); |
| } |
| } |
| |
| if (len <= IW_CUSTOM_MAX) { |
| memset(&wrqu, 0, sizeof(wrqu)); |
| wrqu.data.length = len; |
| wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf); |
| } |
| |
| kfree(buf); |
| } |
| |
| |
| static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
| u32 bss_info_changed) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
| |
| struct ieee80211_bss *bss; |
| |
| bss_info_changed |= BSS_CHANGED_ASSOC; |
| ifmgd->flags |= IEEE80211_STA_ASSOCIATED; |
| |
| bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
| conf->channel->center_freq, |
| ifmgd->ssid, ifmgd->ssid_len); |
| if (bss) { |
| /* 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); |
| |
| cfg80211_hold_bss(&bss->cbss); |
| |
| ieee80211_rx_bss_put(local, bss); |
| } |
| |
| ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET; |
| memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN); |
| ieee80211_sta_send_associnfo(sdata); |
| |
| ifmgd->last_probe = jiffies; |
| 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); |
| |
| /* will be same as sdata */ |
| if (local->ps_sdata) { |
| 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); |
| |
| ieee80211_sta_send_apinfo(sdata); |
| } |
| |
| static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| |
| ifmgd->direct_probe_tries++; |
| if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { |
| printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", |
| sdata->dev->name, ifmgd->bssid); |
| ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
| ieee80211_recalc_idle(local); |
| cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid); |
| |
| /* |
| * Most likely AP is not in the range so remove the |
| * bss information associated to the AP |
| */ |
| ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
| sdata->local->hw.conf.channel->center_freq, |
| ifmgd->ssid, ifmgd->ssid_len); |
| |
| /* |
| * We might have a pending scan which had no chance to run yet |
| * due to state == IEEE80211_STA_MLME_DIRECT_PROBE. |
| * Hence, queue the STAs work again |
| */ |
| queue_work(local->hw.workqueue, &ifmgd->work); |
| return; |
| } |
| |
| printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n", |
| sdata->dev->name, ifmgd->bssid, |
| ifmgd->direct_probe_tries); |
| |
| ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
| |
| /* 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, |
| ifmgd->ssid, ifmgd->ssid_len, NULL, 0); |
| |
| mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
| } |
| |
| |
| static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| u8 *ies; |
| size_t ies_len; |
| |
| ifmgd->auth_tries++; |
| if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) { |
| printk(KERN_DEBUG "%s: authentication with AP %pM" |
| " timed out\n", |
| sdata->dev->name, ifmgd->bssid); |
| ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
| ieee80211_recalc_idle(local); |
| cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid); |
| ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
| sdata->local->hw.conf.channel->center_freq, |
| ifmgd->ssid, ifmgd->ssid_len); |
| |
| /* |
| * We might have a pending scan which had no chance to run yet |
| * due to state == IEEE80211_STA_MLME_AUTHENTICATE. |
| * Hence, queue the STAs work again |
| */ |
| queue_work(local->hw.workqueue, &ifmgd->work); |
| return; |
| } |
| |
| ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
| printk(KERN_DEBUG "%s: authenticate with AP %pM\n", |
| sdata->dev->name, ifmgd->bssid); |
| |
| if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
| ies = ifmgd->sme_auth_ie; |
| ies_len = ifmgd->sme_auth_ie_len; |
| } else { |
| ies = NULL; |
| ies_len = 0; |
| } |
| ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len, |
| ifmgd->bssid, 0); |
| ifmgd->auth_transaction = 2; |
| |
| mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
| } |
| |
| /* |
| * The disassoc 'reason' argument can be either our own reason |
| * if self disconnected or a reason code from the AP. |
| */ |
| static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
| bool deauth, bool self_disconnected, |
| u16 reason) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
| struct ieee80211_bss *bss; |
| struct sta_info *sta; |
| u32 changed = 0, config_changed = 0; |
| |
| if (deauth) { |
| ifmgd->direct_probe_tries = 0; |
| ifmgd->auth_tries = 0; |
| } |
| ifmgd->assoc_scan_tries = 0; |
| ifmgd->assoc_tries = 0; |
| |
| netif_tx_stop_all_queues(sdata->dev); |
| netif_carrier_off(sdata->dev); |
| |
| rcu_read_lock(); |
| sta = sta_info_get(local, ifmgd->bssid); |
| if (sta) |
| ieee80211_sta_tear_down_BA_sessions(sta); |
| rcu_read_unlock(); |
| |
| bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
| conf->channel->center_freq, |
| ifmgd->ssid, ifmgd->ssid_len); |
| |
| if (bss) { |
| cfg80211_unhold_bss(&bss->cbss); |
| ieee80211_rx_bss_put(local, bss); |
| } |
| |
| if (self_disconnected) { |
| if (deauth) |
| ieee80211_send_deauth_disassoc(sdata, |
| IEEE80211_STYPE_DEAUTH, reason); |
| else |
| ieee80211_send_deauth_disassoc(sdata, |
| IEEE80211_STYPE_DISASSOC, reason); |
| } |
| |
| ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; |
| changed |= ieee80211_reset_erp_info(sdata); |
| |
| ieee80211_led_assoc(local, 0); |
| changed |= BSS_CHANGED_ASSOC; |
| sdata->vif.bss_conf.assoc = false; |
| |
| ieee80211_sta_send_apinfo(sdata); |
| |
| if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) { |
| ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
| ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
| sdata->local->hw.conf.channel->center_freq, |
| ifmgd->ssid, ifmgd->ssid_len); |
| } |
| |
| 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, ifmgd->bssid); |
| if (!sta) { |
| rcu_read_unlock(); |
| return; |
| } |
| |
| sta_info_unlink(&sta); |
| |
| rcu_read_unlock(); |
| |
| sta_info_destroy(sta); |
| } |
| |
| static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
| { |
| if (!sdata || !sdata->default_key || |
| sdata->default_key->conf.alg != ALG_WEP) |
| return 0; |
| return 1; |
| } |
| |
| static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_bss *bss; |
| int bss_privacy; |
| int wep_privacy; |
| int privacy_invoked; |
| |
| if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME)) |
| return 0; |
| |
| bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
| local->hw.conf.channel->center_freq, |
| ifmgd->ssid, ifmgd->ssid_len); |
| if (!bss) |
| return 0; |
| |
| bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY); |
| wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
| privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED); |
| |
| ieee80211_rx_bss_put(local, bss); |
| |
| if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
| return 0; |
| |
| return 1; |
| } |
| |
| static void ieee80211_associate(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| |
| ifmgd->assoc_tries++; |
| if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { |
| printk(KERN_DEBUG "%s: association with AP %pM" |
| " timed out\n", |
| sdata->dev->name, ifmgd->bssid); |
| ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
| ieee80211_recalc_idle(local); |
| cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid); |
| ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
| sdata->local->hw.conf.channel->center_freq, |
| ifmgd->ssid, ifmgd->ssid_len); |
| /* |
| * We might have a pending scan which had no chance to run yet |
| * due to state == IEEE80211_STA_MLME_ASSOCIATE. |
| * Hence, queue the STAs work again |
| */ |
| queue_work(local->hw.workqueue, &ifmgd->work); |
| return; |
| } |
| |
| ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
| printk(KERN_DEBUG "%s: associate with AP %pM\n", |
| sdata->dev->name, ifmgd->bssid); |
| if (ieee80211_privacy_mismatch(sdata)) { |
| printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
| "mixed-cell disabled - abort association\n", sdata->dev->name); |
| ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
| ieee80211_recalc_idle(local); |
| return; |
| } |
| |
| ieee80211_send_assoc(sdata); |
| |
| mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); |
| } |
| |
| 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 periodical probe request to |
| * the AP. |
| */ |
| if (!is_multicast_ether_addr(hdr->addr1)) |
| mod_timer(&sdata->u.mgd.timer, |
| jiffies + IEEE80211_MONITORING_INTERVAL); |
| } |
| |
| 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); |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| |
| /* |
| * The driver has already reported this event and we have |
| * already sent a probe request. Maybe the AP died and the |
| * driver keeps reporting until we disassociate... We have |
| * to ignore that because otherwise we would continually |
| * reset the timer and never check whether we received a |
| * probe response! |
| */ |
| if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) |
| return; |
| |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| if (net_ratelimit()) { |
| printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM " |
| "- sending probe request\n", sdata->dev->name, |
| sdata->u.mgd.bssid); |
| } |
| #endif |
| |
| ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; |
| |
| mutex_lock(&sdata->local->iflist_mtx); |
| ieee80211_recalc_ps(sdata->local, -1); |
| mutex_unlock(&sdata->local->iflist_mtx); |
| |
| ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, |
| ifmgd->ssid_len, NULL, 0); |
| |
| mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT); |
| } |
| |
| void ieee80211_beacon_loss(struct ieee80211_vif *vif) |
| { |
| struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| |
| queue_work(sdata->local->hw.workqueue, |
| &sdata->u.mgd.beacon_loss_work); |
| } |
| EXPORT_SYMBOL(ieee80211_beacon_loss); |
| |
| static void ieee80211_associated(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| struct sta_info *sta; |
| unsigned long last_rx; |
| bool disassoc = false; |
| |
| /* TODO: start monitoring current AP signal quality and number of |
| * missed beacons. Scan other channels every now and then and search |
| * for better APs. */ |
| /* TODO: remove expired BSSes */ |
| |
| ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED; |
| |
| rcu_read_lock(); |
| |
| sta = sta_info_get(local, ifmgd->bssid); |
| if (!sta) { |
| printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", |
| sdata->dev->name, ifmgd->bssid); |
| disassoc = true; |
| rcu_read_unlock(); |
| goto out; |
| } |
| |
| last_rx = sta->last_rx; |
| rcu_read_unlock(); |
| |
| if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) && |
| time_after(jiffies, last_rx + IEEE80211_PROBE_WAIT)) { |
| printk(KERN_DEBUG "%s: no probe response from AP %pM " |
| "- disassociating\n", |
| sdata->dev->name, ifmgd->bssid); |
| disassoc = true; |
| ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
| goto out; |
| } |
| |
| /* |
| * Beacon filtering is only enabled with power save and then the |
| * stack should not check for beacon loss. |
| */ |
| if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) && |
| (local->hw.conf.flags & IEEE80211_CONF_PS)) && |
| time_after(jiffies, |
| ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) { |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| if (net_ratelimit()) { |
| printk(KERN_DEBUG "%s: beacon loss from AP %pM " |
| "- sending probe request\n", |
| sdata->dev->name, ifmgd->bssid); |
| } |
| #endif |
| ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; |
| mutex_lock(&local->iflist_mtx); |
| ieee80211_recalc_ps(local, -1); |
| mutex_unlock(&local->iflist_mtx); |
| ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, |
| ifmgd->ssid_len, NULL, 0); |
| mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT); |
| goto out; |
| } |
| |
| if (time_after(jiffies, last_rx + IEEE80211_PROBE_IDLE_TIME)) { |
| ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; |
| mutex_lock(&local->iflist_mtx); |
| ieee80211_recalc_ps(local, -1); |
| mutex_unlock(&local->iflist_mtx); |
| ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, |
| ifmgd->ssid_len, NULL, 0); |
| } |
| |
| out: |
| if (!disassoc) |
| mod_timer(&ifmgd->timer, |
| jiffies + IEEE80211_MONITORING_INTERVAL); |
| else |
| ieee80211_set_disassoc(sdata, true, true, |
| WLAN_REASON_PREV_AUTH_NOT_VALID); |
| } |
| |
| |
| static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| |
| printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
| ifmgd->flags |= IEEE80211_STA_AUTHENTICATED; |
| if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
| /* Wait for SME to request association */ |
| ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
| ieee80211_recalc_idle(sdata->local); |
| } else |
| ieee80211_associate(sdata); |
| } |
| |
| |
| static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
| 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, sdata->u.mgd.auth_alg, |
| elems.challenge - 2, elems.challenge_len + 2, |
| sdata->u.mgd.bssid, 1); |
| sdata->u.mgd.auth_transaction = 4; |
| } |
| |
| static void 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; |
| u16 auth_alg, auth_transaction, status_code; |
| |
| if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE) |
| return; |
| |
| if (len < 24 + 6) |
| return; |
| |
| if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
| return; |
| |
| if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) |
| return; |
| |
| 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_alg || |
| auth_transaction != ifmgd->auth_transaction) |
| return; |
| |
| if (status_code != WLAN_STATUS_SUCCESS) { |
| if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
| u8 algs[3]; |
| const int num_algs = ARRAY_SIZE(algs); |
| int i, pos; |
| algs[0] = algs[1] = algs[2] = 0xff; |
| if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
| algs[0] = WLAN_AUTH_OPEN; |
| if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) |
| algs[1] = WLAN_AUTH_SHARED_KEY; |
| if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) |
| algs[2] = WLAN_AUTH_LEAP; |
| if (ifmgd->auth_alg == WLAN_AUTH_OPEN) |
| pos = 0; |
| else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY) |
| pos = 1; |
| else |
| pos = 2; |
| for (i = 0; i < num_algs; i++) { |
| pos++; |
| if (pos >= num_algs) |
| pos = 0; |
| if (algs[pos] == ifmgd->auth_alg || |
| algs[pos] == 0xff) |
| continue; |
| if (algs[pos] == WLAN_AUTH_SHARED_KEY && |
| !ieee80211_sta_wep_configured(sdata)) |
| continue; |
| ifmgd->auth_alg = algs[pos]; |
| break; |
| } |
| } |
| return; |
| } |
| |
| switch (ifmgd->auth_alg) { |
| case WLAN_AUTH_OPEN: |
| case WLAN_AUTH_LEAP: |
| case WLAN_AUTH_FT: |
| ieee80211_auth_completed(sdata); |
| cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
| break; |
| case WLAN_AUTH_SHARED_KEY: |
| if (ifmgd->auth_transaction == 4) { |
| ieee80211_auth_completed(sdata); |
| cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
| } else |
| ieee80211_auth_challenge(sdata, mgmt, len); |
| break; |
| } |
| } |
| |
| |
| static void 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; |
| u16 reason_code; |
| |
| if (len < 24 + 2) |
| return; |
| |
| if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
| return; |
| |
| reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); |
| |
| if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED) |
| printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n", |
| sdata->dev->name, reason_code); |
| |
| if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
| (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE || |
| ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE || |
| ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) { |
| ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
| mod_timer(&ifmgd->timer, jiffies + |
| IEEE80211_RETRY_AUTH_INTERVAL); |
| } |
| |
| ieee80211_set_disassoc(sdata, true, false, 0); |
| ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED; |
| cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len); |
| } |
| |
| |
| static void 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; |
| |
| if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
| return; |
| |
| reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); |
| |
| if (ifmgd->flags & IEEE80211_STA_ASSOCIATED) |
| printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", |
| sdata->dev->name, reason_code); |
| |
| if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
| ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) { |
| ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
| mod_timer(&ifmgd->timer, jiffies + |
| IEEE80211_RETRY_AUTH_INTERVAL); |
| } |
| |
| ieee80211_set_disassoc(sdata, false, false, reason_code); |
| cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len); |
| } |
| |
| |
| static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_mgmt *mgmt, |
| size_t len, |
| int 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 (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) |
| return; |
| |
| if (len < 24 + 6) |
| return; |
| |
| if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
| return; |
| |
| 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); |
| if (ms > IEEE80211_ASSOC_TIMEOUT) |
| mod_timer(&ifmgd->timer, |
| jiffies + msecs_to_jiffies(ms)); |
| return; |
| } |
| |
| if (status_code != WLAN_STATUS_SUCCESS) { |
| printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", |
| sdata->dev->name, status_code); |
| /* if this was a reassociation, ensure we try a "full" |
| * association next time. This works around some broken APs |
| * which do not correctly reject reassociation requests. */ |
| ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
| cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len); |
| if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
| /* Wait for SME to decide what to do next */ |
| ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
| ieee80211_recalc_idle(local); |
| } |
| return; |
| } |
| |
| 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; |
| } |
| |
| printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
| ifmgd->aid = aid; |
| ifmgd->ap_capab = capab_info; |
| |
| kfree(ifmgd->assocresp_ies); |
| ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt); |
| ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL); |
| if (ifmgd->assocresp_ies) |
| memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len); |
| |
| rcu_read_lock(); |
| |
| /* Add STA entry for the AP */ |
| sta = sta_info_get(local, ifmgd->bssid); |
| if (!sta) { |
| newsta = true; |
| |
| sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC); |
| if (!sta) { |
| printk(KERN_DEBUG "%s: failed to alloc STA entry for" |
| " the AP\n", sdata->dev->name); |
| rcu_read_unlock(); |
| return; |
| } |
| |
| /* update new sta with its last rx activity */ |
| sta->last_rx = jiffies; |
| } |
| |
| /* |
| * FIXME: Do we really need to update the sta_info's information here? |
| * We already know about the AP (we found it in our list) so it |
| * should already be filled with the right info, no? |
| * As is stands, all this is racy because typically we assume |
| * the information that is filled in here (except flags) doesn't |
| * change while a STA structure is alive. As such, it should move |
| * to between the sta_info_alloc() and sta_info_insert() above. |
| */ |
| |
| 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); |
| |
| 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 TKIP/WEP is used, no need to parse AP's HT capabilities */ |
| if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) |
| 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; |
| } |
| } |
| |
| 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_TKIP_WEP_USED)) |
| changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
| ap_ht_cap_flags); |
| |
| /* 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, changed); |
| |
| /* |
| * initialise the time of last beacon to be the association time, |
| * otherwise beacon loss check will trigger immediately |
| */ |
| ifmgd->last_beacon = jiffies; |
| |
| ieee80211_associated(sdata); |
| cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len); |
| } |
| |
| |
| 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) |
| return; |
| |
| if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
| (memcmp(mgmt->bssid, sdata->u.mgd.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); |
| } |
| |
| ieee80211_rx_bss_put(local, bss); |
| } |
| |
| |
| static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
| 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; |
| |
| 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 (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) { |
| printk(KERN_DEBUG "%s direct probe responded\n", |
| sdata->dev->name); |
| ieee80211_authenticate(sdata); |
| } |
| |
| if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) { |
| ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
| mutex_lock(&sdata->local->iflist_mtx); |
| ieee80211_recalc_ps(sdata->local, -1); |
| mutex_unlock(&sdata->local->iflist_mtx); |
| } |
| } |
| |
| /* |
| * 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; |
| |
| /* Process beacon from the current BSS */ |
| baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; |
| if (baselen > len) |
| return; |
| |
| if (rx_status->freq != local->hw.conf.channel->center_freq) |
| return; |
| |
| if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) || |
| memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) |
| return; |
| |
| if (ifmgd->flags & IEEE80211_STA_PROBEREQ_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_PROBEREQ_POLL; |
| mutex_lock(&local->iflist_mtx); |
| ieee80211_recalc_ps(local, -1); |
| mutex_unlock(&local->iflist_mtx); |
| } |
| |
| 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_TKIP_WEP_USED)) { |
| struct sta_info *sta; |
| struct ieee80211_supported_band *sband; |
| u16 ap_ht_cap_flags; |
| |
| rcu_read_lock(); |
| |
| sta = sta_info_get(local, ifmgd->bssid); |
| if (!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, |
| ap_ht_cap_flags); |
| } |
| |
| if (elems.country_elem) { |
| /* Note we are only reviewing this on beacons |
| * for the BSSID we are associated to */ |
| regulatory_hint_11d(local->hw.wiphy, |
| elems.country_elem, elems.country_elem_len); |
| |
| /* 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: |
| skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
| queue_work(local->hw.workqueue, &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_rx_status *rx_status; |
| struct ieee80211_mgmt *mgmt; |
| u16 fc; |
| |
| rx_status = (struct ieee80211_rx_status *) skb->cb; |
| mgmt = (struct ieee80211_mgmt *) skb->data; |
| fc = le16_to_cpu(mgmt->frame_control); |
| |
| switch (fc & IEEE80211_FCTL_STYPE) { |
| case IEEE80211_STYPE_PROBE_RESP: |
| ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, |
| rx_status); |
| break; |
| case IEEE80211_STYPE_BEACON: |
| ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, |
| rx_status); |
| break; |
| case IEEE80211_STYPE_AUTH: |
| ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); |
| break; |
| case IEEE80211_STYPE_ASSOC_RESP: |
| ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0); |
| break; |
| case IEEE80211_STYPE_REASSOC_RESP: |
| ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1); |
| break; |
| case IEEE80211_STYPE_DEAUTH: |
| ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); |
| break; |
| case IEEE80211_STYPE_DISASSOC: |
| ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); |
| break; |
| } |
| |
| 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; |
| } |
| |
| set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
| queue_work(local->hw.workqueue, &ifmgd->work); |
| } |
| |
| static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| |
| /* Reset own TSF to allow time synchronization work. */ |
| drv_reset_tsf(local); |
| |
| ifmgd->wmm_last_param_set = -1; /* allow any WMM update */ |
| |
| |
| if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
| ifmgd->auth_alg = WLAN_AUTH_OPEN; |
| else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) |
| ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY; |
| else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) |
| ifmgd->auth_alg = WLAN_AUTH_LEAP; |
| else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT) |
| ifmgd->auth_alg = WLAN_AUTH_FT; |
| else |
| ifmgd->auth_alg = WLAN_AUTH_OPEN; |
| ifmgd->auth_transaction = -1; |
| ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; |
| ifmgd->assoc_scan_tries = 0; |
| ifmgd->direct_probe_tries = 0; |
| ifmgd->auth_tries = 0; |
| ifmgd->assoc_tries = 0; |
| netif_tx_stop_all_queues(sdata->dev); |
| netif_carrier_off(sdata->dev); |
| } |
| |
| static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_bss *bss; |
| u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid; |
| u8 ssid_len = ifmgd->ssid_len; |
| u16 capa_mask = WLAN_CAPABILITY_ESS; |
| u16 capa_val = WLAN_CAPABILITY_ESS; |
| struct ieee80211_channel *chan = local->oper_channel; |
| |
| if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
| ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL | |
| IEEE80211_STA_AUTO_BSSID_SEL | |
| IEEE80211_STA_AUTO_CHANNEL_SEL)) { |
| capa_mask |= WLAN_CAPABILITY_PRIVACY; |
| if (sdata->default_key) |
| capa_val |= WLAN_CAPABILITY_PRIVACY; |
| } |
| |
| if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) |
| chan = NULL; |
| |
| if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
| bssid = NULL; |
| |
| if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) { |
| ssid = NULL; |
| ssid_len = 0; |
| } |
| |
| bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan, |
| bssid, ssid, ssid_len, |
| capa_mask, capa_val); |
| |
| if (bss) { |
| local->oper_channel = bss->cbss.channel; |
| local->oper_channel_type = NL80211_CHAN_NO_HT; |
| ieee80211_hw_config(local, 0); |
| |
| if (!(ifmgd->flags & IEEE80211_STA_SSID_SET)) |
| ieee80211_sta_set_ssid(sdata, bss->ssid, |
| bss->ssid_len); |
| ieee80211_sta_set_bssid(sdata, bss->cbss.bssid); |
| ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len, |
| bss->supp_rates); |
| if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED) |
| sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED; |
| else |
| sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED; |
| |
| /* Send out direct probe if no probe resp was received or |
| * the one we have is outdated |
| */ |
| if (!bss->last_probe_resp || |
| time_after(jiffies, bss->last_probe_resp |
| + IEEE80211_SCAN_RESULT_EXPIRE)) |
| ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
| else |
| ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
| |
| ieee80211_rx_bss_put(local, bss); |
| ieee80211_sta_reset_auth(sdata); |
| return 0; |
| } else { |
| if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { |
| |
| ifmgd->assoc_scan_tries++; |
| |
| ieee80211_request_internal_scan(sdata, ifmgd->ssid, |
| ssid_len); |
| |
| ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
| set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); |
| } else { |
| ifmgd->assoc_scan_tries = 0; |
| ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
| ieee80211_recalc_idle(local); |
| } |
| } |
| return -1; |
| } |
| |
| |
| 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; |
| |
| if (!netif_running(sdata->dev)) |
| return; |
| |
| if (local->sw_scanning || local->hw_scanning) |
| return; |
| |
| if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
| return; |
| |
| /* |
| * Nothing should have been stuffed into the workqueue during |
| * the suspend->resume cycle. If this WARN is seen then there |
| * is a bug with either the driver suspend or something in |
| * mac80211 stuffing into the workqueue which we haven't yet |
| * cleared during mac80211's suspend cycle. |
| */ |
| if (WARN_ON(local->suspended)) |
| return; |
| |
| ifmgd = &sdata->u.mgd; |
| |
| while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
| ieee80211_sta_rx_queued_mgmt(sdata, skb); |
| |
| if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE && |
| ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE && |
| ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE && |
| test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) { |
| queue_delayed_work(local->hw.workqueue, &local->scan_work, |
| round_jiffies_relative(0)); |
| return; |
| } |
| |
| if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) { |
| if (ieee80211_sta_config_auth(sdata)) |
| return; |
| clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
| } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request)) |
| return; |
| |
| ieee80211_recalc_idle(local); |
| |
| switch (ifmgd->state) { |
| case IEEE80211_STA_MLME_DISABLED: |
| break; |
| case IEEE80211_STA_MLME_DIRECT_PROBE: |
| ieee80211_direct_probe(sdata); |
| break; |
| case IEEE80211_STA_MLME_AUTHENTICATE: |
| ieee80211_authenticate(sdata); |
| break; |
| case IEEE80211_STA_MLME_ASSOCIATE: |
| ieee80211_associate(sdata); |
| break; |
| case IEEE80211_STA_MLME_ASSOCIATED: |
| ieee80211_associated(sdata); |
| break; |
| default: |
| WARN_ON(1); |
| break; |
| } |
| |
| if (ieee80211_privacy_mismatch(sdata)) { |
| printk(KERN_DEBUG "%s: privacy configuration mismatch and " |
| "mixed-cell disabled - disassociate\n", sdata->dev->name); |
| |
| ieee80211_set_disassoc(sdata, false, true, |
| WLAN_REASON_UNSPECIFIED); |
| } |
| } |
| |
| static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
| { |
| if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
| /* |
| * Need to update last_beacon to avoid beacon loss |
| * test to trigger. |
| */ |
| sdata->u.mgd.last_beacon = jiffies; |
| |
| |
| queue_work(sdata->local->hw.workqueue, |
| &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); |
| } |
| |
| 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; |
| u32 hw_flags; |
| |
| ifmgd = &sdata->u.mgd; |
| INIT_WORK(&ifmgd->work, ieee80211_sta_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->chswitch_timer, ieee80211_chswitch_timer, |
| (unsigned long) sdata); |
| skb_queue_head_init(&ifmgd->skb_queue); |
| |
| ifmgd->capab = WLAN_CAPABILITY_ESS; |
| ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN | |
| IEEE80211_AUTH_ALG_SHARED_KEY; |
| ifmgd->flags |= IEEE80211_STA_CREATE_IBSS | |
| IEEE80211_STA_AUTO_BSSID_SEL | |
| IEEE80211_STA_AUTO_CHANNEL_SEL; |
| if (sdata->local->hw.queues >= 4) |
| ifmgd->flags |= IEEE80211_STA_WMM_ENABLED; |
| |
| hw_flags = sdata->local->hw.flags; |
| |
| if (hw_flags & IEEE80211_HW_SUPPORTS_PS) { |
| ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE; |
| sdata->local->hw.conf.dynamic_ps_timeout = 500; |
| } |
| } |
| |
| /* configuration hooks */ |
| void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| |
| if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
| return; |
| |
| if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET | |
| IEEE80211_STA_AUTO_BSSID_SEL)) && |
| (ifmgd->flags & (IEEE80211_STA_SSID_SET | |
| IEEE80211_STA_AUTO_SSID_SEL))) { |
| |
| if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) |
| ieee80211_set_disassoc(sdata, true, true, |
| WLAN_REASON_DEAUTH_LEAVING); |
| |
| if (ifmgd->ssid_len == 0) { |
| /* |
| * Only allow association to be started if a valid SSID |
| * is configured. |
| */ |
| return; |
| } |
| |
| if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) || |
| ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) |
| set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); |
| else if (ifmgd->flags & IEEE80211_STA_EXT_SME) |
| set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
| queue_work(local->hw.workqueue, &ifmgd->work); |
| } |
| } |
| |
| int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| |
| if (ifmgd->ssid_len) |
| ifmgd->flags |= IEEE80211_STA_SSID_SET; |
| else |
| ifmgd->flags &= ~IEEE80211_STA_SSID_SET; |
| |
| return 0; |
| } |
| |
| int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
| { |
| struct ieee80211_if_managed *ifmgd; |
| |
| if (len > IEEE80211_MAX_SSID_LEN) |
| return -EINVAL; |
| |
| ifmgd = &sdata->u.mgd; |
| |
| if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) { |
| if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) |
| ieee80211_set_disassoc(sdata, true, true, |
| WLAN_REASON_DEAUTH_LEAVING); |
| |
| /* |
| * Do not use reassociation if SSID is changed (different ESS). |
| */ |
| ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
| memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid)); |
| memcpy(ifmgd->ssid, ssid, len); |
| ifmgd->ssid_len = len; |
| } |
| |
| return ieee80211_sta_commit(sdata); |
| } |
| |
| int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len); |
| *len = ifmgd->ssid_len; |
| return 0; |
| } |
| |
| int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| |
| if (compare_ether_addr(bssid, ifmgd->bssid) != 0 && |
| ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) |
| ieee80211_set_disassoc(sdata, true, true, |
| WLAN_REASON_DEAUTH_LEAVING); |
| |
| if (is_valid_ether_addr(bssid)) { |
| memcpy(ifmgd->bssid, bssid, ETH_ALEN); |
| ifmgd->flags |= IEEE80211_STA_BSSID_SET; |
| } else { |
| memset(ifmgd->bssid, 0, ETH_ALEN); |
| ifmgd->flags &= ~IEEE80211_STA_BSSID_SET; |
| } |
| |
| return ieee80211_sta_commit(sdata); |
| } |
| |
| int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, |
| const char *ie, size_t len) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| |
| if (len == 0 && ifmgd->extra_ie_len == 0) |
| return -EALREADY; |
| |
| if (len == ifmgd->extra_ie_len && ifmgd->extra_ie && |
| memcmp(ifmgd->extra_ie, ie, len) == 0) |
| return -EALREADY; |
| |
| kfree(ifmgd->extra_ie); |
| if (len == 0) { |
| ifmgd->extra_ie = NULL; |
| ifmgd->extra_ie_len = 0; |
| return 0; |
| } |
| ifmgd->extra_ie = kmalloc(len, GFP_KERNEL); |
| if (!ifmgd->extra_ie) { |
| ifmgd->extra_ie_len = 0; |
| return -ENOMEM; |
| } |
| memcpy(ifmgd->extra_ie, ie, len); |
| ifmgd->extra_ie_len = len; |
| return 0; |
| } |
| |
| int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
| { |
| printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
| sdata->dev->name, reason); |
| |
| ieee80211_set_disassoc(sdata, true, true, reason); |
| return 0; |
| } |
| |
| int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| |
| printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
| sdata->dev->name, reason); |
| |
| if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED)) |
| return -ENOLINK; |
| |
| ieee80211_set_disassoc(sdata, false, true, reason); |
| return 0; |
| } |
| |
| /* 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; |
| } |