Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1 | /* |
| 2 | * BSS client mode implementation |
Jouni Malinen | 5394af4 | 2009-01-08 13:31:59 +0200 | [diff] [blame] | 3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 4 | * Copyright 2004, Instant802 Networks, Inc. |
| 5 | * Copyright 2005, Devicescape Software, Inc. |
| 6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
| 7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | */ |
| 13 | |
Geert Uytterhoeven | 5b323ed | 2007-05-08 18:40:27 -0700 | [diff] [blame] | 14 | #include <linux/delay.h> |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 15 | #include <linux/if_ether.h> |
| 16 | #include <linux/skbuff.h> |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 17 | #include <linux/if_arp.h> |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 18 | #include <linux/etherdevice.h> |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 19 | #include <linux/rtnetlink.h> |
Johannes Berg | 10f644a | 2009-04-16 13:17:25 +0200 | [diff] [blame] | 20 | #include <linux/pm_qos_params.h> |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 21 | #include <linux/crc32.h> |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 22 | #include <net/mac80211.h> |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 23 | #include <asm/unaligned.h> |
Johannes Berg | 60f8b39 | 2008-09-08 17:44:22 +0200 | [diff] [blame] | 24 | |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 25 | #include "ieee80211_i.h" |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 26 | #include "driver-ops.h" |
Johannes Berg | 2c8dccc | 2008-04-08 15:14:40 -0400 | [diff] [blame] | 27 | #include "rate.h" |
| 28 | #include "led.h" |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 29 | |
| 30 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
| 31 | #define IEEE80211_AUTH_MAX_TRIES 3 |
| 32 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) |
| 33 | #define IEEE80211_ASSOC_MAX_TRIES 3 |
Maxim Levitsky | a43abf2 | 2009-07-31 18:54:12 +0300 | [diff] [blame] | 34 | #define IEEE80211_MAX_PROBE_TRIES 5 |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 35 | |
| 36 | /* |
| 37 | * beacon loss detection timeout |
| 38 | * XXX: should depend on beacon interval |
| 39 | */ |
| 40 | #define IEEE80211_BEACON_LOSS_TIME (2 * HZ) |
| 41 | /* |
| 42 | * Time the connection can be idle before we probe |
| 43 | * it to see if we can still talk to the AP. |
| 44 | */ |
Maxim Levitsky | d1c5091 | 2009-07-31 18:54:23 +0300 | [diff] [blame] | 45 | #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 46 | /* |
| 47 | * Time we wait for a probe response after sending |
| 48 | * a probe request because of beacon loss or for |
| 49 | * checking the connection still works. |
| 50 | */ |
Maxim Levitsky | d1c5091 | 2009-07-31 18:54:23 +0300 | [diff] [blame] | 51 | #define IEEE80211_PROBE_WAIT (HZ / 2) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 52 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 53 | #define TMR_RUNNING_TIMER 0 |
| 54 | #define TMR_RUNNING_CHANSW 1 |
| 55 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 56 | /* |
| 57 | * All cfg80211 functions have to be called outside a locked |
| 58 | * section so that they can acquire a lock themselves... This |
| 59 | * is much simpler than queuing up things in cfg80211, but we |
| 60 | * do need some indirection for that here. |
| 61 | */ |
| 62 | enum rx_mgmt_action { |
| 63 | /* no action required */ |
| 64 | RX_MGMT_NONE, |
| 65 | |
| 66 | /* caller must call cfg80211_send_rx_auth() */ |
| 67 | RX_MGMT_CFG80211_AUTH, |
| 68 | |
| 69 | /* caller must call cfg80211_send_rx_assoc() */ |
| 70 | RX_MGMT_CFG80211_ASSOC, |
| 71 | |
| 72 | /* caller must call cfg80211_send_deauth() */ |
| 73 | RX_MGMT_CFG80211_DEAUTH, |
| 74 | |
| 75 | /* caller must call cfg80211_send_disassoc() */ |
| 76 | RX_MGMT_CFG80211_DISASSOC, |
| 77 | |
| 78 | /* caller must call cfg80211_auth_timeout() & free work */ |
| 79 | RX_MGMT_CFG80211_AUTH_TO, |
| 80 | |
| 81 | /* caller must call cfg80211_assoc_timeout() & free work */ |
| 82 | RX_MGMT_CFG80211_ASSOC_TO, |
| 83 | }; |
| 84 | |
Johannes Berg | 5484e23 | 2008-09-08 17:44:27 +0200 | [diff] [blame] | 85 | /* utils */ |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 86 | static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd) |
| 87 | { |
| 88 | WARN_ON(!mutex_is_locked(&ifmgd->mtx)); |
| 89 | } |
| 90 | |
Johannes Berg | ca386f3 | 2009-07-10 02:39:48 +0200 | [diff] [blame] | 91 | /* |
| 92 | * We can have multiple work items (and connection probing) |
| 93 | * scheduling this timer, but we need to take care to only |
| 94 | * reschedule it when it should fire _earlier_ than it was |
| 95 | * asked for before, or if it's not pending right now. This |
| 96 | * function ensures that. Note that it then is required to |
| 97 | * run this function for all timeouts after the first one |
| 98 | * has happened -- the work that runs from this timer will |
| 99 | * do that. |
| 100 | */ |
| 101 | static void run_again(struct ieee80211_if_managed *ifmgd, |
| 102 | unsigned long timeout) |
| 103 | { |
| 104 | ASSERT_MGD_MTX(ifmgd); |
| 105 | |
| 106 | if (!timer_pending(&ifmgd->timer) || |
| 107 | time_before(timeout, ifmgd->timer.expires)) |
| 108 | mod_timer(&ifmgd->timer, timeout); |
| 109 | } |
| 110 | |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 111 | static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata) |
| 112 | { |
| 113 | if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER) |
| 114 | return; |
| 115 | |
| 116 | mod_timer(&sdata->u.mgd.bcn_mon_timer, |
| 117 | round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME)); |
| 118 | } |
| 119 | |
Johannes Berg | 5484e23 | 2008-09-08 17:44:27 +0200 | [diff] [blame] | 120 | static int ecw2cw(int ecw) |
Johannes Berg | 60f8b39 | 2008-09-08 17:44:22 +0200 | [diff] [blame] | 121 | { |
Johannes Berg | 5484e23 | 2008-09-08 17:44:27 +0200 | [diff] [blame] | 122 | return (1 << ecw) - 1; |
Johannes Berg | 60f8b39 | 2008-09-08 17:44:22 +0200 | [diff] [blame] | 123 | } |
| 124 | |
Johannes Berg | c2b1345 | 2008-09-11 00:01:55 +0200 | [diff] [blame] | 125 | static int ieee80211_compatible_rates(struct ieee80211_bss *bss, |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 126 | struct ieee80211_supported_band *sband, |
Johannes Berg | 881d948 | 2009-01-21 15:13:48 +0100 | [diff] [blame] | 127 | u32 *rates) |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 128 | { |
| 129 | int i, j, count; |
| 130 | *rates = 0; |
| 131 | count = 0; |
| 132 | for (i = 0; i < bss->supp_rates_len; i++) { |
| 133 | int rate = (bss->supp_rates[i] & 0x7F) * 5; |
| 134 | |
| 135 | for (j = 0; j < sband->n_bitrates; j++) |
| 136 | if (sband->bitrates[j].bitrate == rate) { |
| 137 | *rates |= BIT(j); |
| 138 | count++; |
| 139 | break; |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | return count; |
| 144 | } |
| 145 | |
Johannes Berg | d5522e0 | 2009-03-30 13:23:35 +0200 | [diff] [blame] | 146 | /* |
| 147 | * ieee80211_enable_ht should be called only after the operating band |
| 148 | * has been determined as ht configuration depends on the hw's |
| 149 | * HT abilities for a specific band. |
| 150 | */ |
| 151 | static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, |
| 152 | struct ieee80211_ht_info *hti, |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 153 | const u8 *bssid, u16 ap_ht_cap_flags) |
Johannes Berg | d5522e0 | 2009-03-30 13:23:35 +0200 | [diff] [blame] | 154 | { |
| 155 | struct ieee80211_local *local = sdata->local; |
| 156 | struct ieee80211_supported_band *sband; |
Johannes Berg | d5522e0 | 2009-03-30 13:23:35 +0200 | [diff] [blame] | 157 | struct sta_info *sta; |
| 158 | u32 changed = 0; |
Johannes Berg | 9ed6bcc | 2009-05-08 20:47:39 +0200 | [diff] [blame] | 159 | u16 ht_opmode; |
Johannes Berg | d5522e0 | 2009-03-30 13:23:35 +0200 | [diff] [blame] | 160 | bool enable_ht = true, ht_changed; |
| 161 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; |
| 162 | |
| 163 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| 164 | |
Johannes Berg | d5522e0 | 2009-03-30 13:23:35 +0200 | [diff] [blame] | 165 | /* HT is not supported */ |
| 166 | if (!sband->ht_cap.ht_supported) |
| 167 | enable_ht = false; |
| 168 | |
| 169 | /* check that channel matches the right operating channel */ |
| 170 | if (local->hw.conf.channel->center_freq != |
| 171 | ieee80211_channel_to_frequency(hti->control_chan)) |
| 172 | enable_ht = false; |
| 173 | |
| 174 | if (enable_ht) { |
| 175 | channel_type = NL80211_CHAN_HT20; |
| 176 | |
| 177 | if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) && |
| 178 | (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && |
| 179 | (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) { |
| 180 | switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
| 181 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: |
Luis R. Rodriguez | 768777e | 2009-05-02 00:37:19 -0400 | [diff] [blame] | 182 | if (!(local->hw.conf.channel->flags & |
| 183 | IEEE80211_CHAN_NO_HT40PLUS)) |
| 184 | channel_type = NL80211_CHAN_HT40PLUS; |
Johannes Berg | d5522e0 | 2009-03-30 13:23:35 +0200 | [diff] [blame] | 185 | break; |
| 186 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
Luis R. Rodriguez | 768777e | 2009-05-02 00:37:19 -0400 | [diff] [blame] | 187 | if (!(local->hw.conf.channel->flags & |
| 188 | IEEE80211_CHAN_NO_HT40MINUS)) |
| 189 | channel_type = NL80211_CHAN_HT40MINUS; |
Johannes Berg | d5522e0 | 2009-03-30 13:23:35 +0200 | [diff] [blame] | 190 | break; |
| 191 | } |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | ht_changed = conf_is_ht(&local->hw.conf) != enable_ht || |
| 196 | channel_type != local->hw.conf.channel_type; |
| 197 | |
| 198 | local->oper_channel_type = channel_type; |
| 199 | |
| 200 | if (ht_changed) { |
| 201 | /* channel_type change automatically detected */ |
| 202 | ieee80211_hw_config(local, 0); |
| 203 | |
| 204 | rcu_read_lock(); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 205 | sta = sta_info_get(local, bssid); |
Johannes Berg | d5522e0 | 2009-03-30 13:23:35 +0200 | [diff] [blame] | 206 | if (sta) |
| 207 | rate_control_rate_update(local, sband, sta, |
| 208 | IEEE80211_RC_HT_CHANGED); |
Johannes Berg | d5522e0 | 2009-03-30 13:23:35 +0200 | [diff] [blame] | 209 | rcu_read_unlock(); |
Johannes Berg | d5522e0 | 2009-03-30 13:23:35 +0200 | [diff] [blame] | 210 | } |
| 211 | |
| 212 | /* disable HT */ |
| 213 | if (!enable_ht) |
| 214 | return 0; |
| 215 | |
Johannes Berg | 9ed6bcc | 2009-05-08 20:47:39 +0200 | [diff] [blame] | 216 | ht_opmode = le16_to_cpu(hti->operation_mode); |
Johannes Berg | d5522e0 | 2009-03-30 13:23:35 +0200 | [diff] [blame] | 217 | |
| 218 | /* if bss configuration changed store the new one */ |
Johannes Berg | 413ad50 | 2009-05-08 21:21:06 +0200 | [diff] [blame] | 219 | if (!sdata->ht_opmode_valid || |
| 220 | sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { |
Johannes Berg | d5522e0 | 2009-03-30 13:23:35 +0200 | [diff] [blame] | 221 | changed |= BSS_CHANGED_HT; |
Johannes Berg | 9ed6bcc | 2009-05-08 20:47:39 +0200 | [diff] [blame] | 222 | sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
Johannes Berg | 413ad50 | 2009-05-08 21:21:06 +0200 | [diff] [blame] | 223 | sdata->ht_opmode_valid = true; |
Johannes Berg | d5522e0 | 2009-03-30 13:23:35 +0200 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | return changed; |
| 227 | } |
| 228 | |
Johannes Berg | 9c6bd79 | 2008-09-11 00:01:52 +0200 | [diff] [blame] | 229 | /* frame sending functions */ |
| 230 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 231 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, |
| 232 | struct ieee80211_mgd_work *wk) |
Johannes Berg | 60f8b39 | 2008-09-08 17:44:22 +0200 | [diff] [blame] | 233 | { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 234 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 235 | struct ieee80211_local *local = sdata->local; |
| 236 | struct sk_buff *skb; |
| 237 | struct ieee80211_mgmt *mgmt; |
Johannes Berg | 517357c | 2009-07-02 17:18:40 +0200 | [diff] [blame] | 238 | u8 *pos; |
| 239 | const u8 *ies, *ht_ie; |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 240 | int i, len, count, rates_len, supp_rates_len; |
| 241 | u16 capab; |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 242 | int wmm = 0; |
| 243 | struct ieee80211_supported_band *sband; |
Johannes Berg | 881d948 | 2009-01-21 15:13:48 +0100 | [diff] [blame] | 244 | u32 rates = 0; |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 245 | |
| 246 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 247 | sizeof(*mgmt) + 200 + wk->ie_len + |
| 248 | wk->ssid_len); |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 249 | if (!skb) { |
| 250 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " |
| 251 | "frame\n", sdata->dev->name); |
| 252 | return; |
| 253 | } |
| 254 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 255 | |
| 256 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| 257 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 258 | capab = ifmgd->capab; |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 259 | |
| 260 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { |
| 261 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) |
| 262 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; |
| 263 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) |
| 264 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; |
| 265 | } |
| 266 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 267 | if (wk->bss->cbss.capability & WLAN_CAPABILITY_PRIVACY) |
| 268 | capab |= WLAN_CAPABILITY_PRIVACY; |
| 269 | if (wk->bss->wmm_used) |
| 270 | wmm = 1; |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 271 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 272 | /* get all rates supported by the device and the AP as |
| 273 | * some APs don't like getting a superset of their rates |
| 274 | * in the association request (e.g. D-Link DAP 1353 in |
| 275 | * b-only mode) */ |
| 276 | rates_len = ieee80211_compatible_rates(wk->bss, sband, &rates); |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 277 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 278 | if ((wk->bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
| 279 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) |
| 280 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 281 | |
| 282 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| 283 | memset(mgmt, 0, 24); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 284 | memcpy(mgmt->da, wk->bss->cbss.bssid, ETH_ALEN); |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 285 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 286 | memcpy(mgmt->bssid, wk->bss->cbss.bssid, ETH_ALEN); |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 287 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 288 | if (!is_zero_ether_addr(wk->prev_bssid)) { |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 289 | skb_put(skb, 10); |
| 290 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 291 | IEEE80211_STYPE_REASSOC_REQ); |
| 292 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); |
| 293 | mgmt->u.reassoc_req.listen_interval = |
| 294 | cpu_to_le16(local->hw.conf.listen_interval); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 295 | memcpy(mgmt->u.reassoc_req.current_ap, wk->prev_bssid, |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 296 | ETH_ALEN); |
| 297 | } else { |
| 298 | skb_put(skb, 4); |
| 299 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 300 | IEEE80211_STYPE_ASSOC_REQ); |
| 301 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); |
Rami Rosen | 1355412 | 2008-12-16 22:38:29 +0200 | [diff] [blame] | 302 | mgmt->u.assoc_req.listen_interval = |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 303 | cpu_to_le16(local->hw.conf.listen_interval); |
| 304 | } |
| 305 | |
| 306 | /* SSID */ |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 307 | ies = pos = skb_put(skb, 2 + wk->ssid_len); |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 308 | *pos++ = WLAN_EID_SSID; |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 309 | *pos++ = wk->ssid_len; |
| 310 | memcpy(pos, wk->ssid, wk->ssid_len); |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 311 | |
| 312 | /* add all rates which were marked to be used above */ |
| 313 | supp_rates_len = rates_len; |
| 314 | if (supp_rates_len > 8) |
| 315 | supp_rates_len = 8; |
| 316 | |
| 317 | len = sband->n_bitrates; |
| 318 | pos = skb_put(skb, supp_rates_len + 2); |
| 319 | *pos++ = WLAN_EID_SUPP_RATES; |
| 320 | *pos++ = supp_rates_len; |
| 321 | |
| 322 | count = 0; |
| 323 | for (i = 0; i < sband->n_bitrates; i++) { |
| 324 | if (BIT(i) & rates) { |
| 325 | int rate = sband->bitrates[i].bitrate; |
| 326 | *pos++ = (u8) (rate / 5); |
| 327 | if (++count == 8) |
| 328 | break; |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | if (rates_len > count) { |
| 333 | pos = skb_put(skb, rates_len - count + 2); |
| 334 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
| 335 | *pos++ = rates_len - count; |
| 336 | |
| 337 | for (i++; i < sband->n_bitrates; i++) { |
| 338 | if (BIT(i) & rates) { |
| 339 | int rate = sband->bitrates[i].bitrate; |
| 340 | *pos++ = (u8) (rate / 5); |
| 341 | } |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { |
| 346 | /* 1. power capabilities */ |
| 347 | pos = skb_put(skb, 4); |
| 348 | *pos++ = WLAN_EID_PWR_CAPABILITY; |
| 349 | *pos++ = 2; |
| 350 | *pos++ = 0; /* min tx power */ |
| 351 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ |
| 352 | |
| 353 | /* 2. supported channels */ |
| 354 | /* TODO: get this in reg domain format */ |
| 355 | pos = skb_put(skb, 2 * sband->n_channels + 2); |
| 356 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; |
| 357 | *pos++ = 2 * sband->n_channels; |
| 358 | for (i = 0; i < sband->n_channels; i++) { |
| 359 | *pos++ = ieee80211_frequency_to_channel( |
| 360 | sband->channels[i].center_freq); |
| 361 | *pos++ = 1; /* one channel in the subband*/ |
| 362 | } |
| 363 | } |
| 364 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 365 | if (wk->ie_len && wk->ie) { |
| 366 | pos = skb_put(skb, wk->ie_len); |
| 367 | memcpy(pos, wk->ie, wk->ie_len); |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 368 | } |
| 369 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 370 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) { |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 371 | pos = skb_put(skb, 9); |
| 372 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; |
| 373 | *pos++ = 7; /* len */ |
| 374 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ |
| 375 | *pos++ = 0x50; |
| 376 | *pos++ = 0xf2; |
| 377 | *pos++ = 2; /* WME */ |
| 378 | *pos++ = 0; /* WME info */ |
| 379 | *pos++ = 1; /* WME ver */ |
| 380 | *pos++ = 0; |
| 381 | } |
| 382 | |
| 383 | /* wmm support is a must to HT */ |
Vasanthakumar Thiagarajan | eb46936 | 2008-12-23 21:30:50 +0530 | [diff] [blame] | 384 | /* |
| 385 | * IEEE802.11n does not allow TKIP/WEP as pairwise |
| 386 | * ciphers in HT mode. We still associate in non-ht |
| 387 | * mode (11a/b/g) if any one of these ciphers is |
| 388 | * configured as pairwise. |
| 389 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 390 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 391 | sband->ht_cap.ht_supported && |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 392 | (ht_ie = ieee80211_bss_get_ie(&wk->bss->cbss, WLAN_EID_HT_INFORMATION)) && |
Vasanthakumar Thiagarajan | eb46936 | 2008-12-23 21:30:50 +0530 | [diff] [blame] | 393 | ht_ie[1] >= sizeof(struct ieee80211_ht_info) && |
Johannes Berg | ab1faea | 2009-07-01 21:41:17 +0200 | [diff] [blame] | 394 | (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) { |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 395 | struct ieee80211_ht_info *ht_info = |
| 396 | (struct ieee80211_ht_info *)(ht_ie + 2); |
| 397 | u16 cap = sband->ht_cap.cap; |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 398 | __le16 tmp; |
| 399 | u32 flags = local->hw.conf.channel->flags; |
| 400 | |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 401 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
| 402 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 403 | if (flags & IEEE80211_CHAN_NO_HT40PLUS) { |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 404 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 405 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
| 406 | } |
| 407 | break; |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 408 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 409 | if (flags & IEEE80211_CHAN_NO_HT40MINUS) { |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 410 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 411 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
| 412 | } |
| 413 | break; |
| 414 | } |
| 415 | |
| 416 | tmp = cpu_to_le16(cap); |
| 417 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); |
| 418 | *pos++ = WLAN_EID_HT_CAPABILITY; |
| 419 | *pos++ = sizeof(struct ieee80211_ht_cap); |
| 420 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); |
| 421 | memcpy(pos, &tmp, sizeof(u16)); |
| 422 | pos += sizeof(u16); |
| 423 | /* TODO: needs a define here for << 2 */ |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 424 | *pos++ = sband->ht_cap.ampdu_factor | |
| 425 | (sband->ht_cap.ampdu_density << 2); |
| 426 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 427 | } |
| 428 | |
Johannes Berg | e50db65 | 2008-09-09 15:07:09 +0200 | [diff] [blame] | 429 | ieee80211_tx_skb(sdata, skb, 0); |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 430 | } |
| 431 | |
| 432 | |
Johannes Berg | ef422bc | 2008-09-09 10:58:25 +0200 | [diff] [blame] | 433 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 667503d | 2009-07-07 03:56:11 +0200 | [diff] [blame] | 434 | const u8 *bssid, u16 stype, u16 reason, |
| 435 | void *cookie) |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 436 | { |
| 437 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 438 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 439 | struct sk_buff *skb; |
| 440 | struct ieee80211_mgmt *mgmt; |
| 441 | |
Jouni Malinen | 65fc73a | 2009-03-20 21:21:16 +0200 | [diff] [blame] | 442 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 443 | if (!skb) { |
Johannes Berg | ef422bc | 2008-09-09 10:58:25 +0200 | [diff] [blame] | 444 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
| 445 | "deauth/disassoc frame\n", sdata->dev->name); |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 446 | return; |
| 447 | } |
| 448 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 449 | |
| 450 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| 451 | memset(mgmt, 0, 24); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 452 | memcpy(mgmt->da, bssid, ETH_ALEN); |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 453 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 454 | memcpy(mgmt->bssid, bssid, ETH_ALEN); |
Johannes Berg | ef422bc | 2008-09-09 10:58:25 +0200 | [diff] [blame] | 455 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 456 | skb_put(skb, 2); |
Johannes Berg | ef422bc | 2008-09-09 10:58:25 +0200 | [diff] [blame] | 457 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 458 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
| 459 | |
Jouni Malinen | 53b46b8 | 2009-03-27 20:53:56 +0200 | [diff] [blame] | 460 | if (stype == IEEE80211_STYPE_DEAUTH) |
Johannes Berg | 667503d | 2009-07-07 03:56:11 +0200 | [diff] [blame] | 461 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, cookie); |
Jouni Malinen | 53b46b8 | 2009-03-27 20:53:56 +0200 | [diff] [blame] | 462 | else |
Johannes Berg | 667503d | 2009-07-07 03:56:11 +0200 | [diff] [blame] | 463 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len, cookie); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 464 | ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED); |
Johannes Berg | 9ac19a9 | 2008-09-09 10:57:09 +0200 | [diff] [blame] | 465 | } |
| 466 | |
Kalle Valo | 572e001 | 2009-02-10 17:09:31 +0200 | [diff] [blame] | 467 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
| 468 | struct ieee80211_sub_if_data *sdata) |
| 469 | { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 470 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
Kalle Valo | 572e001 | 2009-02-10 17:09:31 +0200 | [diff] [blame] | 471 | struct ieee80211_pspoll *pspoll; |
| 472 | struct sk_buff *skb; |
| 473 | u16 fc; |
| 474 | |
| 475 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); |
| 476 | if (!skb) { |
| 477 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
| 478 | "pspoll frame\n", sdata->dev->name); |
| 479 | return; |
| 480 | } |
| 481 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 482 | |
| 483 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); |
| 484 | memset(pspoll, 0, sizeof(*pspoll)); |
| 485 | fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM; |
| 486 | pspoll->frame_control = cpu_to_le16(fc); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 487 | pspoll->aid = cpu_to_le16(ifmgd->aid); |
Kalle Valo | 572e001 | 2009-02-10 17:09:31 +0200 | [diff] [blame] | 488 | |
| 489 | /* aid in PS-Poll has its two MSBs each set to 1 */ |
| 490 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); |
| 491 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 492 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); |
Kalle Valo | 572e001 | 2009-02-10 17:09:31 +0200 | [diff] [blame] | 493 | memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN); |
| 494 | |
| 495 | ieee80211_tx_skb(sdata, skb, 0); |
Kalle Valo | 572e001 | 2009-02-10 17:09:31 +0200 | [diff] [blame] | 496 | } |
| 497 | |
Johannes Berg | 965beda | 2009-04-16 13:17:24 +0200 | [diff] [blame] | 498 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
| 499 | struct ieee80211_sub_if_data *sdata, |
| 500 | int powersave) |
| 501 | { |
| 502 | struct sk_buff *skb; |
| 503 | struct ieee80211_hdr *nullfunc; |
| 504 | __le16 fc; |
| 505 | |
| 506 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
| 507 | return; |
| 508 | |
| 509 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); |
| 510 | if (!skb) { |
| 511 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " |
| 512 | "frame\n", sdata->dev->name); |
| 513 | return; |
| 514 | } |
| 515 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 516 | |
| 517 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); |
| 518 | memset(nullfunc, 0, 24); |
| 519 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | |
| 520 | IEEE80211_FCTL_TODS); |
| 521 | if (powersave) |
| 522 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); |
| 523 | nullfunc->frame_control = fc; |
| 524 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); |
| 525 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); |
| 526 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); |
| 527 | |
| 528 | ieee80211_tx_skb(sdata, skb, 0); |
| 529 | } |
| 530 | |
Johannes Berg | cc32abd | 2009-05-15 11:52:31 +0200 | [diff] [blame] | 531 | /* spectrum management related things */ |
| 532 | static void ieee80211_chswitch_work(struct work_struct *work) |
| 533 | { |
| 534 | struct ieee80211_sub_if_data *sdata = |
| 535 | container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); |
Johannes Berg | cc32abd | 2009-05-15 11:52:31 +0200 | [diff] [blame] | 536 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 537 | |
| 538 | if (!netif_running(sdata->dev)) |
| 539 | return; |
| 540 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 541 | mutex_lock(&ifmgd->mtx); |
| 542 | if (!ifmgd->associated) |
| 543 | goto out; |
Johannes Berg | cc32abd | 2009-05-15 11:52:31 +0200 | [diff] [blame] | 544 | |
| 545 | sdata->local->oper_channel = sdata->local->csa_channel; |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 546 | ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL); |
Johannes Berg | cc32abd | 2009-05-15 11:52:31 +0200 | [diff] [blame] | 547 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 548 | /* XXX: shouldn't really modify cfg80211-owned data! */ |
| 549 | ifmgd->associated->cbss.channel = sdata->local->oper_channel; |
| 550 | |
Johannes Berg | cc32abd | 2009-05-15 11:52:31 +0200 | [diff] [blame] | 551 | ieee80211_wake_queues_by_reason(&sdata->local->hw, |
| 552 | IEEE80211_QUEUE_STOP_REASON_CSA); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 553 | out: |
| 554 | ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; |
| 555 | mutex_unlock(&ifmgd->mtx); |
Johannes Berg | cc32abd | 2009-05-15 11:52:31 +0200 | [diff] [blame] | 556 | } |
| 557 | |
| 558 | static void ieee80211_chswitch_timer(unsigned long data) |
| 559 | { |
| 560 | struct ieee80211_sub_if_data *sdata = |
| 561 | (struct ieee80211_sub_if_data *) data; |
| 562 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 563 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 564 | if (sdata->local->quiescing) { |
| 565 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); |
| 566 | return; |
| 567 | } |
| 568 | |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 569 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
Johannes Berg | cc32abd | 2009-05-15 11:52:31 +0200 | [diff] [blame] | 570 | } |
| 571 | |
| 572 | void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, |
| 573 | struct ieee80211_channel_sw_ie *sw_elem, |
| 574 | struct ieee80211_bss *bss) |
| 575 | { |
| 576 | struct ieee80211_channel *new_ch; |
| 577 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 578 | int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num); |
| 579 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 580 | ASSERT_MGD_MTX(ifmgd); |
| 581 | |
| 582 | if (!ifmgd->associated) |
Johannes Berg | cc32abd | 2009-05-15 11:52:31 +0200 | [diff] [blame] | 583 | return; |
| 584 | |
Helmut Schaa | fbe9c42 | 2009-07-23 12:14:04 +0200 | [diff] [blame] | 585 | if (sdata->local->scanning) |
Johannes Berg | cc32abd | 2009-05-15 11:52:31 +0200 | [diff] [blame] | 586 | return; |
| 587 | |
| 588 | /* Disregard subsequent beacons if we are already running a timer |
| 589 | processing a CSA */ |
| 590 | |
| 591 | if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED) |
| 592 | return; |
| 593 | |
| 594 | new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); |
| 595 | if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) |
| 596 | return; |
| 597 | |
| 598 | sdata->local->csa_channel = new_ch; |
| 599 | |
| 600 | if (sw_elem->count <= 1) { |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 601 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
Johannes Berg | cc32abd | 2009-05-15 11:52:31 +0200 | [diff] [blame] | 602 | } else { |
| 603 | ieee80211_stop_queues_by_reason(&sdata->local->hw, |
| 604 | IEEE80211_QUEUE_STOP_REASON_CSA); |
| 605 | ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; |
| 606 | mod_timer(&ifmgd->chswitch_timer, |
| 607 | jiffies + |
| 608 | msecs_to_jiffies(sw_elem->count * |
| 609 | bss->cbss.beacon_interval)); |
| 610 | } |
| 611 | } |
| 612 | |
| 613 | static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, |
| 614 | u16 capab_info, u8 *pwr_constr_elem, |
| 615 | u8 pwr_constr_elem_len) |
| 616 | { |
| 617 | struct ieee80211_conf *conf = &sdata->local->hw.conf; |
| 618 | |
| 619 | if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT)) |
| 620 | return; |
| 621 | |
| 622 | /* Power constraint IE length should be 1 octet */ |
| 623 | if (pwr_constr_elem_len != 1) |
| 624 | return; |
| 625 | |
| 626 | if ((*pwr_constr_elem <= conf->channel->max_power) && |
| 627 | (*pwr_constr_elem != sdata->local->power_constr_level)) { |
| 628 | sdata->local->power_constr_level = *pwr_constr_elem; |
| 629 | ieee80211_hw_config(sdata->local, 0); |
| 630 | } |
| 631 | } |
| 632 | |
Johannes Berg | 965beda | 2009-04-16 13:17:24 +0200 | [diff] [blame] | 633 | /* powersave */ |
| 634 | static void ieee80211_enable_ps(struct ieee80211_local *local, |
| 635 | struct ieee80211_sub_if_data *sdata) |
| 636 | { |
| 637 | struct ieee80211_conf *conf = &local->hw.conf; |
| 638 | |
Johannes Berg | d5edaed | 2009-04-22 23:02:51 +0200 | [diff] [blame] | 639 | /* |
| 640 | * If we are scanning right now then the parameters will |
| 641 | * take effect when scan finishes. |
| 642 | */ |
Helmut Schaa | fbe9c42 | 2009-07-23 12:14:04 +0200 | [diff] [blame] | 643 | if (local->scanning) |
Johannes Berg | d5edaed | 2009-04-22 23:02:51 +0200 | [diff] [blame] | 644 | return; |
| 645 | |
Johannes Berg | 965beda | 2009-04-16 13:17:24 +0200 | [diff] [blame] | 646 | if (conf->dynamic_ps_timeout > 0 && |
| 647 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { |
| 648 | mod_timer(&local->dynamic_ps_timer, jiffies + |
| 649 | msecs_to_jiffies(conf->dynamic_ps_timeout)); |
| 650 | } else { |
| 651 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
| 652 | ieee80211_send_nullfunc(local, sdata, 1); |
| 653 | conf->flags |= IEEE80211_CONF_PS; |
| 654 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
| 655 | } |
| 656 | } |
| 657 | |
| 658 | static void ieee80211_change_ps(struct ieee80211_local *local) |
| 659 | { |
| 660 | struct ieee80211_conf *conf = &local->hw.conf; |
| 661 | |
| 662 | if (local->ps_sdata) { |
Johannes Berg | 965beda | 2009-04-16 13:17:24 +0200 | [diff] [blame] | 663 | ieee80211_enable_ps(local, local->ps_sdata); |
| 664 | } else if (conf->flags & IEEE80211_CONF_PS) { |
| 665 | conf->flags &= ~IEEE80211_CONF_PS; |
| 666 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
| 667 | del_timer_sync(&local->dynamic_ps_timer); |
| 668 | cancel_work_sync(&local->dynamic_ps_enable_work); |
| 669 | } |
| 670 | } |
| 671 | |
| 672 | /* need to hold RTNL or interface lock */ |
Johannes Berg | 10f644a | 2009-04-16 13:17:25 +0200 | [diff] [blame] | 673 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
Johannes Berg | 965beda | 2009-04-16 13:17:24 +0200 | [diff] [blame] | 674 | { |
| 675 | struct ieee80211_sub_if_data *sdata, *found = NULL; |
| 676 | int count = 0; |
| 677 | |
| 678 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { |
| 679 | local->ps_sdata = NULL; |
| 680 | return; |
| 681 | } |
| 682 | |
| 683 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 684 | if (!netif_running(sdata->dev)) |
| 685 | continue; |
| 686 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
| 687 | continue; |
| 688 | found = sdata; |
| 689 | count++; |
| 690 | } |
| 691 | |
Luis R. Rodriguez | 43f7853 | 2009-06-10 15:16:15 +0200 | [diff] [blame] | 692 | if (count == 1 && found->u.mgd.powersave && |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 693 | found->u.mgd.associated && list_empty(&found->u.mgd.work_list) && |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 694 | !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL | |
| 695 | IEEE80211_STA_CONNECTION_POLL))) { |
Johannes Berg | 10f644a | 2009-04-16 13:17:25 +0200 | [diff] [blame] | 696 | s32 beaconint_us; |
| 697 | |
| 698 | if (latency < 0) |
| 699 | latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY); |
| 700 | |
| 701 | beaconint_us = ieee80211_tu_to_usec( |
| 702 | found->vif.bss_conf.beacon_int); |
| 703 | |
Johannes Berg | 04fe203 | 2009-04-22 18:44:37 +0200 | [diff] [blame] | 704 | if (beaconint_us > latency) { |
Johannes Berg | 10f644a | 2009-04-16 13:17:25 +0200 | [diff] [blame] | 705 | local->ps_sdata = NULL; |
Johannes Berg | 04fe203 | 2009-04-22 18:44:37 +0200 | [diff] [blame] | 706 | } else { |
| 707 | u8 dtimper = found->vif.bss_conf.dtim_period; |
| 708 | int maxslp = 1; |
| 709 | |
| 710 | if (dtimper > 1) |
| 711 | maxslp = min_t(int, dtimper, |
| 712 | latency / beaconint_us); |
| 713 | |
Johannes Berg | 9ccebe6 | 2009-04-23 10:32:36 +0200 | [diff] [blame] | 714 | local->hw.conf.max_sleep_period = maxslp; |
Johannes Berg | 10f644a | 2009-04-16 13:17:25 +0200 | [diff] [blame] | 715 | local->ps_sdata = found; |
Johannes Berg | 04fe203 | 2009-04-22 18:44:37 +0200 | [diff] [blame] | 716 | } |
Johannes Berg | 10f644a | 2009-04-16 13:17:25 +0200 | [diff] [blame] | 717 | } else { |
Johannes Berg | 965beda | 2009-04-16 13:17:24 +0200 | [diff] [blame] | 718 | local->ps_sdata = NULL; |
Johannes Berg | 10f644a | 2009-04-16 13:17:25 +0200 | [diff] [blame] | 719 | } |
Johannes Berg | 965beda | 2009-04-16 13:17:24 +0200 | [diff] [blame] | 720 | |
| 721 | ieee80211_change_ps(local); |
| 722 | } |
| 723 | |
| 724 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) |
| 725 | { |
| 726 | struct ieee80211_local *local = |
| 727 | container_of(work, struct ieee80211_local, |
| 728 | dynamic_ps_disable_work); |
| 729 | |
| 730 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
| 731 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
| 732 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
| 733 | } |
| 734 | |
| 735 | ieee80211_wake_queues_by_reason(&local->hw, |
| 736 | IEEE80211_QUEUE_STOP_REASON_PS); |
| 737 | } |
| 738 | |
| 739 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) |
| 740 | { |
| 741 | struct ieee80211_local *local = |
| 742 | container_of(work, struct ieee80211_local, |
| 743 | dynamic_ps_enable_work); |
| 744 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; |
| 745 | |
| 746 | /* can only happen when PS was just disabled anyway */ |
| 747 | if (!sdata) |
| 748 | return; |
| 749 | |
| 750 | if (local->hw.conf.flags & IEEE80211_CONF_PS) |
| 751 | return; |
| 752 | |
| 753 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
| 754 | ieee80211_send_nullfunc(local, sdata, 1); |
| 755 | |
| 756 | local->hw.conf.flags |= IEEE80211_CONF_PS; |
| 757 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
| 758 | } |
| 759 | |
| 760 | void ieee80211_dynamic_ps_timer(unsigned long data) |
| 761 | { |
| 762 | struct ieee80211_local *local = (void *) data; |
| 763 | |
Luis R. Rodriguez | 78f1a8b | 2009-07-27 08:38:25 -0700 | [diff] [blame] | 764 | if (local->quiescing || local->suspended) |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 765 | return; |
| 766 | |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 767 | ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); |
Johannes Berg | 965beda | 2009-04-16 13:17:24 +0200 | [diff] [blame] | 768 | } |
| 769 | |
Johannes Berg | 60f8b39 | 2008-09-08 17:44:22 +0200 | [diff] [blame] | 770 | /* MLME */ |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 771 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 772 | struct ieee80211_if_managed *ifmgd, |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 773 | u8 *wmm_param, size_t wmm_param_len) |
| 774 | { |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 775 | struct ieee80211_tx_queue_params params; |
| 776 | size_t left; |
| 777 | int count; |
| 778 | u8 *pos; |
| 779 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 780 | if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) |
Johannes Berg | 3434fbd | 2008-05-03 00:59:37 +0200 | [diff] [blame] | 781 | return; |
| 782 | |
| 783 | if (!wmm_param) |
| 784 | return; |
| 785 | |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 786 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
| 787 | return; |
| 788 | count = wmm_param[6] & 0x0f; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 789 | if (count == ifmgd->wmm_last_param_set) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 790 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 791 | ifmgd->wmm_last_param_set = count; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 792 | |
| 793 | pos = wmm_param + 8; |
| 794 | left = wmm_param_len - 8; |
| 795 | |
| 796 | memset(¶ms, 0, sizeof(params)); |
| 797 | |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 798 | local->wmm_acm = 0; |
| 799 | for (; left >= 4; left -= 4, pos += 4) { |
| 800 | int aci = (pos[0] >> 5) & 0x03; |
| 801 | int acm = (pos[0] >> 4) & 0x01; |
| 802 | int queue; |
| 803 | |
| 804 | switch (aci) { |
Jouni Malinen | 0eeb59f | 2009-03-05 17:23:46 +0200 | [diff] [blame] | 805 | case 1: /* AC_BK */ |
Johannes Berg | e100bb6 | 2008-04-30 18:51:21 +0200 | [diff] [blame] | 806 | queue = 3; |
Johannes Berg | 988c0f7 | 2008-04-17 19:21:22 +0200 | [diff] [blame] | 807 | if (acm) |
Jouni Malinen | 0eeb59f | 2009-03-05 17:23:46 +0200 | [diff] [blame] | 808 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 809 | break; |
Jouni Malinen | 0eeb59f | 2009-03-05 17:23:46 +0200 | [diff] [blame] | 810 | case 2: /* AC_VI */ |
Johannes Berg | e100bb6 | 2008-04-30 18:51:21 +0200 | [diff] [blame] | 811 | queue = 1; |
Johannes Berg | 988c0f7 | 2008-04-17 19:21:22 +0200 | [diff] [blame] | 812 | if (acm) |
Jouni Malinen | 0eeb59f | 2009-03-05 17:23:46 +0200 | [diff] [blame] | 813 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 814 | break; |
Jouni Malinen | 0eeb59f | 2009-03-05 17:23:46 +0200 | [diff] [blame] | 815 | case 3: /* AC_VO */ |
Johannes Berg | e100bb6 | 2008-04-30 18:51:21 +0200 | [diff] [blame] | 816 | queue = 0; |
Johannes Berg | 988c0f7 | 2008-04-17 19:21:22 +0200 | [diff] [blame] | 817 | if (acm) |
Jouni Malinen | 0eeb59f | 2009-03-05 17:23:46 +0200 | [diff] [blame] | 818 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 819 | break; |
Jouni Malinen | 0eeb59f | 2009-03-05 17:23:46 +0200 | [diff] [blame] | 820 | case 0: /* AC_BE */ |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 821 | default: |
Johannes Berg | e100bb6 | 2008-04-30 18:51:21 +0200 | [diff] [blame] | 822 | queue = 2; |
Johannes Berg | 988c0f7 | 2008-04-17 19:21:22 +0200 | [diff] [blame] | 823 | if (acm) |
Jouni Malinen | 0eeb59f | 2009-03-05 17:23:46 +0200 | [diff] [blame] | 824 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 825 | break; |
| 826 | } |
| 827 | |
| 828 | params.aifs = pos[0] & 0x0f; |
| 829 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); |
| 830 | params.cw_min = ecw2cw(pos[1] & 0x0f); |
Johannes Berg | f434b2d | 2008-07-10 11:22:31 +0200 | [diff] [blame] | 831 | params.txop = get_unaligned_le16(pos + 2); |
Johannes Berg | f4ea83d | 2008-06-30 15:10:46 +0200 | [diff] [blame] | 832 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 833 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
Johannes Berg | 3330d7b | 2008-02-10 16:49:38 +0100 | [diff] [blame] | 834 | "cWmin=%d cWmax=%d txop=%d\n", |
Johannes Berg | 0bffe40 | 2009-06-09 16:18:32 +0200 | [diff] [blame] | 835 | wiphy_name(local->hw.wiphy), queue, aci, acm, |
| 836 | params.aifs, params.cw_min, params.cw_max, params.txop); |
Johannes Berg | 3330d7b | 2008-02-10 16:49:38 +0100 | [diff] [blame] | 837 | #endif |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 838 | if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 839 | printk(KERN_DEBUG "%s: failed to set TX queue " |
Johannes Berg | 0bffe40 | 2009-06-09 16:18:32 +0200 | [diff] [blame] | 840 | "parameters for queue %d\n", |
| 841 | wiphy_name(local->hw.wiphy), queue); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 842 | } |
| 843 | } |
| 844 | |
Johannes Berg | 7a5158e | 2008-10-08 10:59:33 +0200 | [diff] [blame] | 845 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
| 846 | u16 capab, bool erp_valid, u8 erp) |
Daniel Drake | 5628221 | 2007-07-10 19:32:10 +0200 | [diff] [blame] | 847 | { |
Johannes Berg | bda3933 | 2008-10-11 01:51:51 +0200 | [diff] [blame] | 848 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
Johannes Berg | 471b3ef | 2007-12-28 14:32:58 +0100 | [diff] [blame] | 849 | u32 changed = 0; |
Johannes Berg | 7a5158e | 2008-10-08 10:59:33 +0200 | [diff] [blame] | 850 | bool use_protection; |
| 851 | bool use_short_preamble; |
| 852 | bool use_short_slot; |
| 853 | |
| 854 | if (erp_valid) { |
| 855 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; |
| 856 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; |
| 857 | } else { |
| 858 | use_protection = false; |
| 859 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); |
| 860 | } |
| 861 | |
| 862 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); |
Daniel Drake | 5628221 | 2007-07-10 19:32:10 +0200 | [diff] [blame] | 863 | |
Johannes Berg | 471b3ef | 2007-12-28 14:32:58 +0100 | [diff] [blame] | 864 | if (use_protection != bss_conf->use_cts_prot) { |
Johannes Berg | 471b3ef | 2007-12-28 14:32:58 +0100 | [diff] [blame] | 865 | bss_conf->use_cts_prot = use_protection; |
| 866 | changed |= BSS_CHANGED_ERP_CTS_PROT; |
Daniel Drake | 5628221 | 2007-07-10 19:32:10 +0200 | [diff] [blame] | 867 | } |
Daniel Drake | 7e9ed18 | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 868 | |
Vladimir Koutny | d43c7b3 | 2008-03-31 17:05:03 +0200 | [diff] [blame] | 869 | if (use_short_preamble != bss_conf->use_short_preamble) { |
Vladimir Koutny | d43c7b3 | 2008-03-31 17:05:03 +0200 | [diff] [blame] | 870 | bss_conf->use_short_preamble = use_short_preamble; |
Johannes Berg | 471b3ef | 2007-12-28 14:32:58 +0100 | [diff] [blame] | 871 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
Daniel Drake | 7e9ed18 | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 872 | } |
Daniel Drake | d9430a3 | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 873 | |
Johannes Berg | 7a5158e | 2008-10-08 10:59:33 +0200 | [diff] [blame] | 874 | if (use_short_slot != bss_conf->use_short_slot) { |
Johannes Berg | 7a5158e | 2008-10-08 10:59:33 +0200 | [diff] [blame] | 875 | bss_conf->use_short_slot = use_short_slot; |
| 876 | changed |= BSS_CHANGED_ERP_SLOT; |
John W. Linville | 50c4afb | 2008-04-15 14:09:27 -0400 | [diff] [blame] | 877 | } |
| 878 | |
| 879 | return changed; |
| 880 | } |
| 881 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 882 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | e21546a | 2009-08-06 20:41:32 +0200 | [diff] [blame] | 883 | struct ieee80211_mgd_work *wk, |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 884 | u32 bss_info_changed) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 885 | { |
Johannes Berg | 471b3ef | 2007-12-28 14:32:58 +0100 | [diff] [blame] | 886 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | e21546a | 2009-08-06 20:41:32 +0200 | [diff] [blame] | 887 | struct ieee80211_bss *bss = wk->bss; |
Jiri Slaby | d6f2da5 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 888 | |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 889 | bss_info_changed |= BSS_CHANGED_ASSOC; |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 890 | /* set timing information */ |
| 891 | sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval; |
| 892 | sdata->vif.bss_conf.timestamp = bss->cbss.tsf; |
| 893 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; |
Jiri Slaby | d6f2da5 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 894 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 895 | bss_info_changed |= BSS_CHANGED_BEACON_INT; |
| 896 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
| 897 | bss->cbss.capability, bss->has_erp_value, bss->erp_value); |
Tomas Winkler | 21c0cbe | 2008-03-28 16:33:34 -0700 | [diff] [blame] | 898 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 899 | sdata->u.mgd.associated = bss; |
Johannes Berg | e21546a | 2009-08-06 20:41:32 +0200 | [diff] [blame] | 900 | sdata->u.mgd.old_associate_work = wk; |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 901 | memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN); |
Johannes Berg | 471b3ef | 2007-12-28 14:32:58 +0100 | [diff] [blame] | 902 | |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 903 | /* just to be sure */ |
| 904 | sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL | |
| 905 | IEEE80211_STA_BEACON_POLL); |
| 906 | |
Tomas Winkler | f5e5bf2 | 2008-09-08 17:33:39 +0200 | [diff] [blame] | 907 | ieee80211_led_assoc(local, 1); |
| 908 | |
Johannes Berg | bda3933 | 2008-10-11 01:51:51 +0200 | [diff] [blame] | 909 | sdata->vif.bss_conf.assoc = 1; |
Johannes Berg | 96dd22a | 2008-09-11 00:01:57 +0200 | [diff] [blame] | 910 | /* |
| 911 | * For now just always ask the driver to update the basic rateset |
| 912 | * when we have associated, we aren't checking whether it actually |
| 913 | * changed or not. |
| 914 | */ |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 915 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
Johannes Berg | 9cef873 | 2009-05-14 13:10:14 +0200 | [diff] [blame] | 916 | |
| 917 | /* And the BSSID changed - we're associated now */ |
| 918 | bss_info_changed |= BSS_CHANGED_BSSID; |
| 919 | |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 920 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); |
Guy Cohen | 8db9369 | 2008-07-03 19:56:13 +0300 | [diff] [blame] | 921 | |
Johannes Berg | 056508d | 2009-07-30 21:43:55 +0200 | [diff] [blame] | 922 | mutex_lock(&local->iflist_mtx); |
| 923 | ieee80211_recalc_ps(local, -1); |
| 924 | mutex_unlock(&local->iflist_mtx); |
Kalle Valo | e0cb686 | 2008-12-18 23:35:13 +0200 | [diff] [blame] | 925 | |
Tomas Winkler | 24e6462 | 2008-09-08 17:33:40 +0200 | [diff] [blame] | 926 | netif_tx_start_all_queues(sdata->dev); |
Tomas Winkler | f5e5bf2 | 2008-09-08 17:33:39 +0200 | [diff] [blame] | 927 | netif_carrier_on(sdata->dev); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 928 | } |
| 929 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 930 | static enum rx_mgmt_action __must_check |
| 931 | ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata, |
| 932 | struct ieee80211_mgd_work *wk) |
Ron Rindjunsky | 9859b81 | 2008-08-09 03:02:19 +0300 | [diff] [blame] | 933 | { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 934 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
Helmut Schaa | 1143237 | 2009-03-12 14:04:34 +0100 | [diff] [blame] | 935 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 936 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 937 | wk->tries++; |
| 938 | if (wk->tries > IEEE80211_AUTH_MAX_TRIES) { |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 939 | printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 940 | sdata->dev->name, wk->bss->cbss.bssid); |
Vasanthakumar Thiagarajan | 7a94708 | 2009-02-04 18:28:48 +0530 | [diff] [blame] | 941 | |
| 942 | /* |
| 943 | * Most likely AP is not in the range so remove the |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 944 | * bss struct for that AP. |
Vasanthakumar Thiagarajan | 7a94708 | 2009-02-04 18:28:48 +0530 | [diff] [blame] | 945 | */ |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 946 | cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss); |
Helmut Schaa | 1143237 | 2009-03-12 14:04:34 +0100 | [diff] [blame] | 947 | |
| 948 | /* |
| 949 | * We might have a pending scan which had no chance to run yet |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 950 | * due to work needing to be done. Hence, queue the STAs work |
| 951 | * again for that. |
Helmut Schaa | 1143237 | 2009-03-12 14:04:34 +0100 | [diff] [blame] | 952 | */ |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 953 | ieee80211_queue_work(&local->hw, &ifmgd->work); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 954 | return RX_MGMT_CFG80211_AUTH_TO; |
Ron Rindjunsky | 9859b81 | 2008-08-09 03:02:19 +0300 | [diff] [blame] | 955 | } |
| 956 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 957 | printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n", |
| 958 | sdata->dev->name, wk->bss->cbss.bssid, |
| 959 | wk->tries); |
Ron Rindjunsky | 9859b81 | 2008-08-09 03:02:19 +0300 | [diff] [blame] | 960 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 961 | /* |
| 962 | * Direct probe is sent to broadcast address as some APs |
Ron Rindjunsky | 9859b81 | 2008-08-09 03:02:19 +0300 | [diff] [blame] | 963 | * will not answer to direct packet in unassociated state. |
| 964 | */ |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 965 | ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0); |
Ron Rindjunsky | 9859b81 | 2008-08-09 03:02:19 +0300 | [diff] [blame] | 966 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 967 | wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; |
Johannes Berg | ca386f3 | 2009-07-10 02:39:48 +0200 | [diff] [blame] | 968 | run_again(ifmgd, wk->timeout); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 969 | |
| 970 | return RX_MGMT_NONE; |
Ron Rindjunsky | 9859b81 | 2008-08-09 03:02:19 +0300 | [diff] [blame] | 971 | } |
| 972 | |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 973 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 974 | static enum rx_mgmt_action __must_check |
| 975 | ieee80211_authenticate(struct ieee80211_sub_if_data *sdata, |
| 976 | struct ieee80211_mgd_work *wk) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 977 | { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 978 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
Helmut Schaa | 1143237 | 2009-03-12 14:04:34 +0100 | [diff] [blame] | 979 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 980 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 981 | wk->tries++; |
| 982 | if (wk->tries > IEEE80211_AUTH_MAX_TRIES) { |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 983 | printk(KERN_DEBUG "%s: authentication with AP %pM" |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 984 | " timed out\n", |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 985 | sdata->dev->name, wk->bss->cbss.bssid); |
| 986 | |
| 987 | /* |
| 988 | * Most likely AP is not in the range so remove the |
| 989 | * bss struct for that AP. |
| 990 | */ |
| 991 | cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss); |
Helmut Schaa | 1143237 | 2009-03-12 14:04:34 +0100 | [diff] [blame] | 992 | |
| 993 | /* |
| 994 | * We might have a pending scan which had no chance to run yet |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 995 | * due to work needing to be done. Hence, queue the STAs work |
| 996 | * again for that. |
Helmut Schaa | 1143237 | 2009-03-12 14:04:34 +0100 | [diff] [blame] | 997 | */ |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 998 | ieee80211_queue_work(&local->hw, &ifmgd->work); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 999 | return RX_MGMT_CFG80211_AUTH_TO; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1000 | } |
| 1001 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1002 | printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n", |
| 1003 | sdata->dev->name, wk->bss->cbss.bssid, wk->tries); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1004 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1005 | ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len, |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 1006 | wk->bss->cbss.bssid, NULL, 0, 0); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1007 | wk->auth_transaction = 2; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1008 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1009 | wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; |
Johannes Berg | ca386f3 | 2009-07-10 02:39:48 +0200 | [diff] [blame] | 1010 | run_again(ifmgd, wk->timeout); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1011 | |
| 1012 | return RX_MGMT_NONE; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1013 | } |
| 1014 | |
Johannes Berg | e21546a | 2009-08-06 20:41:32 +0200 | [diff] [blame] | 1015 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
| 1016 | bool deauth) |
Tomas Winkler | aa458d1 | 2008-09-09 00:32:12 +0300 | [diff] [blame] | 1017 | { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1018 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
Tomas Winkler | aa458d1 | 2008-09-09 00:32:12 +0300 | [diff] [blame] | 1019 | struct ieee80211_local *local = sdata->local; |
| 1020 | struct sta_info *sta; |
Kalle Valo | e0cb686 | 2008-12-18 23:35:13 +0200 | [diff] [blame] | 1021 | u32 changed = 0, config_changed = 0; |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1022 | u8 bssid[ETH_ALEN]; |
Tomas Winkler | aa458d1 | 2008-09-09 00:32:12 +0300 | [diff] [blame] | 1023 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1024 | ASSERT_MGD_MTX(ifmgd); |
| 1025 | |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1026 | if (WARN_ON(!ifmgd->associated)) |
| 1027 | return; |
| 1028 | |
| 1029 | memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN); |
| 1030 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1031 | ifmgd->associated = NULL; |
| 1032 | memset(ifmgd->bssid, 0, ETH_ALEN); |
| 1033 | |
Johannes Berg | e21546a | 2009-08-06 20:41:32 +0200 | [diff] [blame] | 1034 | if (deauth) { |
| 1035 | kfree(ifmgd->old_associate_work); |
| 1036 | ifmgd->old_associate_work = NULL; |
| 1037 | } else { |
| 1038 | struct ieee80211_mgd_work *wk = ifmgd->old_associate_work; |
| 1039 | |
| 1040 | wk->state = IEEE80211_MGD_STATE_IDLE; |
| 1041 | list_add(&wk->list, &ifmgd->work_list); |
| 1042 | } |
| 1043 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1044 | /* |
| 1045 | * we need to commit the associated = NULL change because the |
| 1046 | * scan code uses that to determine whether this iface should |
| 1047 | * go to/wake up from powersave or not -- and could otherwise |
| 1048 | * wake the queues erroneously. |
| 1049 | */ |
| 1050 | smp_mb(); |
| 1051 | |
| 1052 | /* |
| 1053 | * Thus, we can only afterwards stop the queues -- to account |
| 1054 | * for the case where another CPU is finishing a scan at this |
| 1055 | * time -- we don't want the scan code to enable queues. |
| 1056 | */ |
Tomas Winkler | aa458d1 | 2008-09-09 00:32:12 +0300 | [diff] [blame] | 1057 | |
Tomas Winkler | 24e6462 | 2008-09-08 17:33:40 +0200 | [diff] [blame] | 1058 | netif_tx_stop_all_queues(sdata->dev); |
Tomas Winkler | aa458d1 | 2008-09-09 00:32:12 +0300 | [diff] [blame] | 1059 | netif_carrier_off(sdata->dev); |
| 1060 | |
Johannes Berg | 1fa6f4a | 2009-06-15 18:13:58 +0200 | [diff] [blame] | 1061 | rcu_read_lock(); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1062 | sta = sta_info_get(local, bssid); |
Johannes Berg | 1fa6f4a | 2009-06-15 18:13:58 +0200 | [diff] [blame] | 1063 | if (sta) |
| 1064 | ieee80211_sta_tear_down_BA_sessions(sta); |
| 1065 | rcu_read_unlock(); |
Tomas Winkler | aa458d1 | 2008-09-09 00:32:12 +0300 | [diff] [blame] | 1066 | |
Tomas Winkler | f5e5bf2 | 2008-09-08 17:33:39 +0200 | [diff] [blame] | 1067 | changed |= ieee80211_reset_erp_info(sdata); |
| 1068 | |
Tomas Winkler | f5e5bf2 | 2008-09-08 17:33:39 +0200 | [diff] [blame] | 1069 | ieee80211_led_assoc(local, 0); |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 1070 | changed |= BSS_CHANGED_ASSOC; |
| 1071 | sdata->vif.bss_conf.assoc = false; |
Tomas Winkler | f5e5bf2 | 2008-09-08 17:33:39 +0200 | [diff] [blame] | 1072 | |
Johannes Berg | aa837e1 | 2009-05-07 16:16:24 +0200 | [diff] [blame] | 1073 | ieee80211_set_wmm_default(sdata); |
| 1074 | |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 1075 | ieee80211_recalc_idle(local); |
| 1076 | |
Johannes Berg | 4797938 | 2009-01-07 10:13:27 +0100 | [diff] [blame] | 1077 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
Sujith | 094d05d | 2008-12-12 11:57:43 +0530 | [diff] [blame] | 1078 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 1079 | |
Johannes Berg | 413ad50 | 2009-05-08 21:21:06 +0200 | [diff] [blame] | 1080 | /* on the next assoc, re-program HT parameters */ |
| 1081 | sdata->ht_opmode_valid = false; |
| 1082 | |
Vasanthakumar Thiagarajan | a8302de | 2009-01-09 18:14:15 +0530 | [diff] [blame] | 1083 | local->power_constr_level = 0; |
| 1084 | |
Kalle Valo | 520eb82 | 2008-12-18 23:35:27 +0200 | [diff] [blame] | 1085 | del_timer_sync(&local->dynamic_ps_timer); |
| 1086 | cancel_work_sync(&local->dynamic_ps_enable_work); |
| 1087 | |
Kalle Valo | e0cb686 | 2008-12-18 23:35:13 +0200 | [diff] [blame] | 1088 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
| 1089 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
| 1090 | config_changed |= IEEE80211_CONF_CHANGE_PS; |
| 1091 | } |
| 1092 | |
| 1093 | ieee80211_hw_config(local, config_changed); |
Johannes Berg | 9cef873 | 2009-05-14 13:10:14 +0200 | [diff] [blame] | 1094 | |
| 1095 | /* And the BSSID changed -- not very interesting here */ |
| 1096 | changed |= BSS_CHANGED_BSSID; |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 1097 | ieee80211_bss_info_change_notify(sdata, changed); |
Tomas Winkler | 8e268e4 | 2008-11-25 13:05:44 +0200 | [diff] [blame] | 1098 | |
| 1099 | rcu_read_lock(); |
| 1100 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1101 | sta = sta_info_get(local, bssid); |
Tomas Winkler | 8e268e4 | 2008-11-25 13:05:44 +0200 | [diff] [blame] | 1102 | if (!sta) { |
| 1103 | rcu_read_unlock(); |
| 1104 | return; |
| 1105 | } |
| 1106 | |
| 1107 | sta_info_unlink(&sta); |
| 1108 | |
| 1109 | rcu_read_unlock(); |
| 1110 | |
| 1111 | sta_info_destroy(sta); |
Tomas Winkler | aa458d1 | 2008-09-09 00:32:12 +0300 | [diff] [blame] | 1112 | } |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1113 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1114 | static enum rx_mgmt_action __must_check |
| 1115 | ieee80211_associate(struct ieee80211_sub_if_data *sdata, |
| 1116 | struct ieee80211_mgd_work *wk) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1117 | { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1118 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
Helmut Schaa | 1143237 | 2009-03-12 14:04:34 +0100 | [diff] [blame] | 1119 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1120 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1121 | wk->tries++; |
| 1122 | if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) { |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 1123 | printk(KERN_DEBUG "%s: association with AP %pM" |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1124 | " timed out\n", |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1125 | sdata->dev->name, wk->bss->cbss.bssid); |
| 1126 | |
| 1127 | /* |
| 1128 | * Most likely AP is not in the range so remove the |
| 1129 | * bss struct for that AP. |
| 1130 | */ |
| 1131 | cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss); |
| 1132 | |
Helmut Schaa | 1143237 | 2009-03-12 14:04:34 +0100 | [diff] [blame] | 1133 | /* |
| 1134 | * We might have a pending scan which had no chance to run yet |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1135 | * due to work needing to be done. Hence, queue the STAs work |
| 1136 | * again for that. |
Helmut Schaa | 1143237 | 2009-03-12 14:04:34 +0100 | [diff] [blame] | 1137 | */ |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 1138 | ieee80211_queue_work(&local->hw, &ifmgd->work); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1139 | return RX_MGMT_CFG80211_ASSOC_TO; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1140 | } |
| 1141 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1142 | printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n", |
| 1143 | sdata->dev->name, wk->bss->cbss.bssid, wk->tries); |
| 1144 | ieee80211_send_assoc(sdata, wk); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1145 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1146 | wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; |
Johannes Berg | ca386f3 | 2009-07-10 02:39:48 +0200 | [diff] [blame] | 1147 | run_again(ifmgd, wk->timeout); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1148 | |
| 1149 | return RX_MGMT_NONE; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1150 | } |
| 1151 | |
Kalle Valo | 3cf335d | 2009-03-22 21:57:06 +0200 | [diff] [blame] | 1152 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
| 1153 | struct ieee80211_hdr *hdr) |
| 1154 | { |
| 1155 | /* |
| 1156 | * We can postpone the mgd.timer whenever receiving unicast frames |
| 1157 | * from AP because we know that the connection is working both ways |
| 1158 | * at that time. But multicast frames (and hence also beacons) must |
| 1159 | * be ignored here, because we need to trigger the timer during |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1160 | * data idle periods for sending the periodic probe request to the |
| 1161 | * AP we're connected to. |
Kalle Valo | 3cf335d | 2009-03-22 21:57:06 +0200 | [diff] [blame] | 1162 | */ |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1163 | if (is_multicast_ether_addr(hdr->addr1)) |
| 1164 | return; |
| 1165 | |
| 1166 | mod_timer(&sdata->u.mgd.conn_mon_timer, |
| 1167 | round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); |
Kalle Valo | 3cf335d | 2009-03-22 21:57:06 +0200 | [diff] [blame] | 1168 | } |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1169 | |
Maxim Levitsky | a43abf2 | 2009-07-31 18:54:12 +0300 | [diff] [blame] | 1170 | static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) |
| 1171 | { |
| 1172 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 1173 | const u8 *ssid; |
| 1174 | |
| 1175 | ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID); |
| 1176 | ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid, |
| 1177 | ssid + 2, ssid[1], NULL, 0); |
| 1178 | |
| 1179 | ifmgd->probe_send_count++; |
| 1180 | ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT; |
| 1181 | run_again(ifmgd, ifmgd->probe_timeout); |
| 1182 | } |
| 1183 | |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1184 | static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, |
| 1185 | bool beacon) |
Kalle Valo | 04de838 | 2009-03-22 21:57:35 +0200 | [diff] [blame] | 1186 | { |
Kalle Valo | 04de838 | 2009-03-22 21:57:35 +0200 | [diff] [blame] | 1187 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1188 | bool already = false; |
Johannes Berg | 34bfc41 | 2009-05-12 19:58:12 +0200 | [diff] [blame] | 1189 | |
Johannes Berg | 0e2b628 | 2009-07-13 13:23:39 +0200 | [diff] [blame] | 1190 | if (!netif_running(sdata->dev)) |
| 1191 | return; |
| 1192 | |
Luis R. Rodriguez | 91a3bd7 | 2009-07-23 16:37:47 -0700 | [diff] [blame] | 1193 | if (sdata->local->scanning) |
| 1194 | return; |
| 1195 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1196 | mutex_lock(&ifmgd->mtx); |
| 1197 | |
| 1198 | if (!ifmgd->associated) |
| 1199 | goto out; |
| 1200 | |
Michael Buesch | a860402 | 2009-04-15 14:41:22 -0400 | [diff] [blame] | 1201 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1202 | if (beacon && net_ratelimit()) |
| 1203 | printk(KERN_DEBUG "%s: detected beacon loss from AP " |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1204 | "- sending probe request\n", sdata->dev->name); |
Michael Buesch | a860402 | 2009-04-15 14:41:22 -0400 | [diff] [blame] | 1205 | #endif |
Kalle Valo | 04de838 | 2009-03-22 21:57:35 +0200 | [diff] [blame] | 1206 | |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1207 | /* |
| 1208 | * The driver/our work has already reported this event or the |
| 1209 | * connection monitoring has kicked in and we have already sent |
| 1210 | * a probe request. Or maybe the AP died and the driver keeps |
| 1211 | * reporting until we disassociate... |
| 1212 | * |
| 1213 | * In either case we have to ignore the current call to this |
| 1214 | * function (except for setting the correct probe reason bit) |
| 1215 | * because otherwise we would reset the timer every time and |
| 1216 | * never check whether we received a probe response! |
| 1217 | */ |
| 1218 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
| 1219 | IEEE80211_STA_CONNECTION_POLL)) |
| 1220 | already = true; |
| 1221 | |
| 1222 | if (beacon) |
| 1223 | ifmgd->flags |= IEEE80211_STA_BEACON_POLL; |
| 1224 | else |
| 1225 | ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; |
| 1226 | |
| 1227 | if (already) |
| 1228 | goto out; |
| 1229 | |
Johannes Berg | 4e75184 | 2009-06-10 15:16:52 +0200 | [diff] [blame] | 1230 | mutex_lock(&sdata->local->iflist_mtx); |
| 1231 | ieee80211_recalc_ps(sdata->local, -1); |
| 1232 | mutex_unlock(&sdata->local->iflist_mtx); |
| 1233 | |
Maxim Levitsky | a43abf2 | 2009-07-31 18:54:12 +0300 | [diff] [blame] | 1234 | ifmgd->probe_send_count = 0; |
| 1235 | ieee80211_mgd_probe_ap_send(sdata); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1236 | out: |
| 1237 | mutex_unlock(&ifmgd->mtx); |
Kalle Valo | 04de838 | 2009-03-22 21:57:35 +0200 | [diff] [blame] | 1238 | } |
| 1239 | |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1240 | void ieee80211_beacon_loss_work(struct work_struct *work) |
| 1241 | { |
| 1242 | struct ieee80211_sub_if_data *sdata = |
| 1243 | container_of(work, struct ieee80211_sub_if_data, |
| 1244 | u.mgd.beacon_loss_work); |
| 1245 | |
| 1246 | ieee80211_mgd_probe_ap(sdata, true); |
| 1247 | } |
| 1248 | |
Kalle Valo | 04de838 | 2009-03-22 21:57:35 +0200 | [diff] [blame] | 1249 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) |
| 1250 | { |
| 1251 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 1252 | |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 1253 | ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work); |
Kalle Valo | 04de838 | 2009-03-22 21:57:35 +0200 | [diff] [blame] | 1254 | } |
| 1255 | EXPORT_SYMBOL(ieee80211_beacon_loss); |
| 1256 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1257 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata, |
| 1258 | struct ieee80211_mgd_work *wk) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1259 | { |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1260 | wk->state = IEEE80211_MGD_STATE_IDLE; |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 1261 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1262 | } |
| 1263 | |
| 1264 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 1265 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1266 | struct ieee80211_mgd_work *wk, |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1267 | struct ieee80211_mgmt *mgmt, |
| 1268 | size_t len) |
| 1269 | { |
| 1270 | u8 *pos; |
| 1271 | struct ieee802_11_elems elems; |
| 1272 | |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1273 | pos = mgmt->u.auth.variable; |
John W. Linville | 67a4cce | 2007-10-12 16:40:37 -0400 | [diff] [blame] | 1274 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
Johannes Berg | f4ea83d | 2008-06-30 15:10:46 +0200 | [diff] [blame] | 1275 | if (!elems.challenge) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1276 | return; |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1277 | ieee80211_send_auth(sdata, 3, wk->auth_alg, |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1278 | elems.challenge - 2, elems.challenge_len + 2, |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 1279 | wk->bss->cbss.bssid, |
| 1280 | wk->key, wk->key_len, wk->key_idx); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1281 | wk->auth_transaction = 4; |
Johannes Berg | fe3d2c3 | 2009-02-10 21:26:03 +0100 | [diff] [blame] | 1282 | } |
| 1283 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1284 | static enum rx_mgmt_action __must_check |
| 1285 | ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
| 1286 | struct ieee80211_mgd_work *wk, |
| 1287 | struct ieee80211_mgmt *mgmt, size_t len) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1288 | { |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1289 | u16 auth_alg, auth_transaction, status_code; |
| 1290 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1291 | if (wk->state != IEEE80211_MGD_STATE_AUTH) |
| 1292 | return RX_MGMT_NONE; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1293 | |
Johannes Berg | f4ea83d | 2008-06-30 15:10:46 +0200 | [diff] [blame] | 1294 | if (len < 24 + 6) |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1295 | return RX_MGMT_NONE; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1296 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1297 | if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0) |
| 1298 | return RX_MGMT_NONE; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1299 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1300 | if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0) |
| 1301 | return RX_MGMT_NONE; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1302 | |
| 1303 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); |
| 1304 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); |
| 1305 | status_code = le16_to_cpu(mgmt->u.auth.status_code); |
| 1306 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1307 | if (auth_alg != wk->auth_alg || |
| 1308 | auth_transaction != wk->auth_transaction) |
| 1309 | return RX_MGMT_NONE; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1310 | |
| 1311 | if (status_code != WLAN_STATUS_SUCCESS) { |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1312 | list_del(&wk->list); |
| 1313 | kfree(wk); |
| 1314 | return RX_MGMT_CFG80211_AUTH; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1315 | } |
| 1316 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1317 | switch (wk->auth_alg) { |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1318 | case WLAN_AUTH_OPEN: |
| 1319 | case WLAN_AUTH_LEAP: |
Jouni Malinen | 636a5d3 | 2009-03-19 13:39:22 +0200 | [diff] [blame] | 1320 | case WLAN_AUTH_FT: |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1321 | ieee80211_auth_completed(sdata, wk); |
| 1322 | return RX_MGMT_CFG80211_AUTH; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1323 | case WLAN_AUTH_SHARED_KEY: |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1324 | if (wk->auth_transaction == 4) { |
| 1325 | ieee80211_auth_completed(sdata, wk); |
| 1326 | return RX_MGMT_CFG80211_AUTH; |
Jouni Malinen | 6039f6d | 2009-03-19 13:39:21 +0200 | [diff] [blame] | 1327 | } else |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1328 | ieee80211_auth_challenge(sdata, wk, mgmt, len); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1329 | break; |
| 1330 | } |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1331 | |
| 1332 | return RX_MGMT_NONE; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1333 | } |
| 1334 | |
| 1335 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1336 | static enum rx_mgmt_action __must_check |
| 1337 | ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
| 1338 | struct ieee80211_mgd_work *wk, |
| 1339 | struct ieee80211_mgmt *mgmt, size_t len) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1340 | { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1341 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1342 | const u8 *bssid = NULL; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1343 | u16 reason_code; |
| 1344 | |
Johannes Berg | f4ea83d | 2008-06-30 15:10:46 +0200 | [diff] [blame] | 1345 | if (len < 24 + 2) |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1346 | return RX_MGMT_NONE; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1347 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1348 | ASSERT_MGD_MTX(ifmgd); |
| 1349 | |
| 1350 | if (wk) |
| 1351 | bssid = wk->bss->cbss.bssid; |
| 1352 | else |
| 1353 | bssid = ifmgd->associated->cbss.bssid; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1354 | |
| 1355 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); |
| 1356 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1357 | printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n", |
| 1358 | sdata->dev->name, bssid, reason_code); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1359 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1360 | if (!wk) { |
Johannes Berg | e21546a | 2009-08-06 20:41:32 +0200 | [diff] [blame] | 1361 | ieee80211_set_disassoc(sdata, true); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1362 | } else { |
| 1363 | list_del(&wk->list); |
| 1364 | kfree(wk); |
| 1365 | } |
| 1366 | |
| 1367 | return RX_MGMT_CFG80211_DEAUTH; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1368 | } |
| 1369 | |
| 1370 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1371 | static enum rx_mgmt_action __must_check |
| 1372 | ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
| 1373 | struct ieee80211_mgmt *mgmt, size_t len) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1374 | { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1375 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1376 | u16 reason_code; |
| 1377 | |
Johannes Berg | f4ea83d | 2008-06-30 15:10:46 +0200 | [diff] [blame] | 1378 | if (len < 24 + 2) |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1379 | return RX_MGMT_NONE; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1380 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1381 | ASSERT_MGD_MTX(ifmgd); |
| 1382 | |
| 1383 | if (WARN_ON(!ifmgd->associated)) |
| 1384 | return RX_MGMT_NONE; |
| 1385 | |
| 1386 | if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN))) |
| 1387 | return RX_MGMT_NONE; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1388 | |
| 1389 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); |
| 1390 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1391 | printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", |
| 1392 | sdata->dev->name, reason_code); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1393 | |
Johannes Berg | e21546a | 2009-08-06 20:41:32 +0200 | [diff] [blame] | 1394 | ieee80211_set_disassoc(sdata, false); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1395 | return RX_MGMT_CFG80211_DISASSOC; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1396 | } |
| 1397 | |
| 1398 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1399 | static enum rx_mgmt_action __must_check |
| 1400 | ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
| 1401 | struct ieee80211_mgd_work *wk, |
| 1402 | struct ieee80211_mgmt *mgmt, size_t len, |
| 1403 | bool reassoc) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1404 | { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1405 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
Johannes Berg | 471b3ef | 2007-12-28 14:32:58 +0100 | [diff] [blame] | 1406 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1407 | struct ieee80211_supported_band *sband; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1408 | struct sta_info *sta; |
Johannes Berg | 881d948 | 2009-01-21 15:13:48 +0100 | [diff] [blame] | 1409 | u32 rates, basic_rates; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1410 | u16 capab_info, status_code, aid; |
| 1411 | struct ieee802_11_elems elems; |
Johannes Berg | bda3933 | 2008-10-11 01:51:51 +0200 | [diff] [blame] | 1412 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1413 | u8 *pos; |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 1414 | u32 changed = 0; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1415 | int i, j; |
Johannes Berg | ddf4ac5 | 2008-10-22 11:41:38 +0200 | [diff] [blame] | 1416 | bool have_higher_than_11mbit = false, newsta = false; |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 1417 | u16 ap_ht_cap_flags; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1418 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1419 | /* |
| 1420 | * AssocResp and ReassocResp have identical structure, so process both |
| 1421 | * of them in this function. |
| 1422 | */ |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1423 | |
Johannes Berg | f4ea83d | 2008-06-30 15:10:46 +0200 | [diff] [blame] | 1424 | if (len < 24 + 6) |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1425 | return RX_MGMT_NONE; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1426 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1427 | if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0) |
| 1428 | return RX_MGMT_NONE; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1429 | |
| 1430 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
| 1431 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); |
| 1432 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1433 | |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 1434 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1435 | "status=%d aid=%d)\n", |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 1436 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, |
Johannes Berg | ddd6858 | 2007-10-22 14:51:37 +0200 | [diff] [blame] | 1437 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1438 | |
Jouni Malinen | 63a5ab8 | 2009-01-08 13:32:09 +0200 | [diff] [blame] | 1439 | pos = mgmt->u.assoc_resp.variable; |
| 1440 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
| 1441 | |
| 1442 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && |
Jouni Malinen | f797eb7 | 2009-01-19 18:48:46 +0200 | [diff] [blame] | 1443 | elems.timeout_int && elems.timeout_int_len == 5 && |
| 1444 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { |
Jouni Malinen | 63a5ab8 | 2009-01-08 13:32:09 +0200 | [diff] [blame] | 1445 | u32 tu, ms; |
Jouni Malinen | f797eb7 | 2009-01-19 18:48:46 +0200 | [diff] [blame] | 1446 | tu = get_unaligned_le32(elems.timeout_int + 1); |
Jouni Malinen | 63a5ab8 | 2009-01-08 13:32:09 +0200 | [diff] [blame] | 1447 | ms = tu * 1024 / 1000; |
| 1448 | printk(KERN_DEBUG "%s: AP rejected association temporarily; " |
| 1449 | "comeback duration %u TU (%u ms)\n", |
| 1450 | sdata->dev->name, tu, ms); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1451 | wk->timeout = jiffies + msecs_to_jiffies(ms); |
Jouni Malinen | 63a5ab8 | 2009-01-08 13:32:09 +0200 | [diff] [blame] | 1452 | if (ms > IEEE80211_ASSOC_TIMEOUT) |
Johannes Berg | ca386f3 | 2009-07-10 02:39:48 +0200 | [diff] [blame] | 1453 | run_again(ifmgd, jiffies + msecs_to_jiffies(ms)); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1454 | return RX_MGMT_NONE; |
Jouni Malinen | 63a5ab8 | 2009-01-08 13:32:09 +0200 | [diff] [blame] | 1455 | } |
| 1456 | |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1457 | if (status_code != WLAN_STATUS_SUCCESS) { |
| 1458 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 1459 | sdata->dev->name, status_code); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1460 | list_del(&wk->list); |
| 1461 | kfree(wk); |
| 1462 | return RX_MGMT_CFG80211_ASSOC; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1463 | } |
| 1464 | |
Johannes Berg | 1dd84aa | 2007-10-10 12:03:41 +0200 | [diff] [blame] | 1465 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
| 1466 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 1467 | "set\n", sdata->dev->name, aid); |
Johannes Berg | 1dd84aa | 2007-10-10 12:03:41 +0200 | [diff] [blame] | 1468 | aid &= ~(BIT(15) | BIT(14)); |
| 1469 | |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1470 | if (!elems.supp_rates) { |
| 1471 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 1472 | sdata->dev->name); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1473 | return RX_MGMT_NONE; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1474 | } |
| 1475 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 1476 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1477 | ifmgd->aid = aid; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1478 | |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 1479 | rcu_read_lock(); |
| 1480 | |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1481 | /* Add STA entry for the AP */ |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1482 | sta = sta_info_get(local, wk->bss->cbss.bssid); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1483 | if (!sta) { |
Johannes Berg | ddf4ac5 | 2008-10-22 11:41:38 +0200 | [diff] [blame] | 1484 | newsta = true; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 1485 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1486 | rcu_read_unlock(); |
| 1487 | |
| 1488 | sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL); |
Johannes Berg | 73651ee | 2008-02-25 16:27:47 +0100 | [diff] [blame] | 1489 | if (!sta) { |
| 1490 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 1491 | " the AP\n", sdata->dev->name); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1492 | return RX_MGMT_NONE; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1493 | } |
Johannes Berg | 73651ee | 2008-02-25 16:27:47 +0100 | [diff] [blame] | 1494 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1495 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | |
| 1496 | WLAN_STA_ASSOC_AP); |
| 1497 | if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) |
| 1498 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); |
| 1499 | |
| 1500 | rcu_read_lock(); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1501 | } |
| 1502 | |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1503 | rates = 0; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1504 | basic_rates = 0; |
| 1505 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| 1506 | |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1507 | for (i = 0; i < elems.supp_rates_len; i++) { |
| 1508 | int rate = (elems.supp_rates[i] & 0x7f) * 5; |
Tomas Winkler | d61272c | 2008-10-30 17:08:08 +0200 | [diff] [blame] | 1509 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1510 | |
| 1511 | if (rate > 110) |
| 1512 | have_higher_than_11mbit = true; |
| 1513 | |
| 1514 | for (j = 0; j < sband->n_bitrates; j++) { |
Tomas Winkler | d61272c | 2008-10-30 17:08:08 +0200 | [diff] [blame] | 1515 | if (sband->bitrates[j].bitrate == rate) { |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1516 | rates |= BIT(j); |
Tomas Winkler | d61272c | 2008-10-30 17:08:08 +0200 | [diff] [blame] | 1517 | if (is_basic) |
| 1518 | basic_rates |= BIT(j); |
| 1519 | break; |
| 1520 | } |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1521 | } |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1522 | } |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1523 | |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1524 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
| 1525 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; |
Johannes Berg | 7e0986c | 2009-04-19 13:22:11 +0200 | [diff] [blame] | 1526 | bool is_basic = !!(elems.ext_supp_rates[i] & 0x80); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1527 | |
| 1528 | if (rate > 110) |
| 1529 | have_higher_than_11mbit = true; |
| 1530 | |
| 1531 | for (j = 0; j < sband->n_bitrates; j++) { |
Tomas Winkler | d61272c | 2008-10-30 17:08:08 +0200 | [diff] [blame] | 1532 | if (sband->bitrates[j].bitrate == rate) { |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1533 | rates |= BIT(j); |
Tomas Winkler | d61272c | 2008-10-30 17:08:08 +0200 | [diff] [blame] | 1534 | if (is_basic) |
| 1535 | basic_rates |= BIT(j); |
| 1536 | break; |
| 1537 | } |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1538 | } |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1539 | } |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1540 | |
Johannes Berg | 323ce79 | 2008-09-11 02:45:11 +0200 | [diff] [blame] | 1541 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
Johannes Berg | bda3933 | 2008-10-11 01:51:51 +0200 | [diff] [blame] | 1542 | sdata->vif.bss_conf.basic_rates = basic_rates; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1543 | |
| 1544 | /* cf. IEEE 802.11 9.2.12 */ |
| 1545 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && |
| 1546 | have_higher_than_11mbit) |
| 1547 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
| 1548 | else |
| 1549 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1550 | |
Johannes Berg | ab1faea | 2009-07-01 21:41:17 +0200 | [diff] [blame] | 1551 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 1552 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 1553 | elems.ht_cap_elem, &sta->sta.ht_cap); |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 1554 | |
| 1555 | ap_ht_cap_flags = sta->sta.ht_cap.cap; |
Ron Rindjunsky | d3c990f | 2007-11-26 16:14:34 +0200 | [diff] [blame] | 1556 | |
Johannes Berg | 4b7679a | 2008-09-18 18:14:18 +0200 | [diff] [blame] | 1557 | rate_control_rate_init(sta); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1558 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1559 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
Jouni Malinen | 5394af4 | 2009-01-08 13:31:59 +0200 | [diff] [blame] | 1560 | set_sta_flags(sta, WLAN_STA_MFP); |
| 1561 | |
Johannes Berg | ddf4ac5 | 2008-10-22 11:41:38 +0200 | [diff] [blame] | 1562 | if (elems.wmm_param) |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 1563 | set_sta_flags(sta, WLAN_STA_WME); |
Johannes Berg | ddf4ac5 | 2008-10-22 11:41:38 +0200 | [diff] [blame] | 1564 | |
| 1565 | if (newsta) { |
| 1566 | int err = sta_info_insert(sta); |
| 1567 | if (err) { |
| 1568 | printk(KERN_DEBUG "%s: failed to insert STA entry for" |
| 1569 | " the AP (error %d)\n", sdata->dev->name, err); |
| 1570 | rcu_read_unlock(); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1571 | return RX_MGMT_NONE; |
Johannes Berg | ddf4ac5 | 2008-10-22 11:41:38 +0200 | [diff] [blame] | 1572 | } |
| 1573 | } |
| 1574 | |
| 1575 | rcu_read_unlock(); |
| 1576 | |
| 1577 | if (elems.wmm_param) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1578 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1579 | elems.wmm_param_len); |
Johannes Berg | aa837e1 | 2009-05-07 16:16:24 +0200 | [diff] [blame] | 1580 | else |
| 1581 | ieee80211_set_wmm_default(sdata); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1582 | |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 1583 | if (elems.ht_info_elem && elems.wmm_param && |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1584 | (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
Johannes Berg | ab1faea | 2009-07-01 21:41:17 +0200 | [diff] [blame] | 1585 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 1586 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1587 | wk->bss->cbss.bssid, |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 1588 | ap_ht_cap_flags); |
| 1589 | |
Johannes Berg | 056508d | 2009-07-30 21:43:55 +0200 | [diff] [blame] | 1590 | /* delete work item -- must be before set_associated for PS */ |
| 1591 | list_del(&wk->list); |
| 1592 | |
Tomas Winkler | 21c0cbe | 2008-03-28 16:33:34 -0700 | [diff] [blame] | 1593 | /* set AID and assoc capability, |
| 1594 | * ieee80211_set_associated() will tell the driver */ |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1595 | bss_conf->aid = aid; |
Tomas Winkler | 21c0cbe | 2008-03-28 16:33:34 -0700 | [diff] [blame] | 1596 | bss_conf->assoc_capability = capab_info; |
Johannes Berg | e21546a | 2009-08-06 20:41:32 +0200 | [diff] [blame] | 1597 | /* this will take ownership of wk */ |
| 1598 | ieee80211_set_associated(sdata, wk, changed); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1599 | |
Kalle Valo | 15b7b06 | 2009-03-22 21:57:14 +0200 | [diff] [blame] | 1600 | /* |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1601 | * Start timer to probe the connection to the AP now. |
| 1602 | * Also start the timer that will detect beacon loss. |
Kalle Valo | 15b7b06 | 2009-03-22 21:57:14 +0200 | [diff] [blame] | 1603 | */ |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1604 | ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); |
| 1605 | mod_beacon_timer(sdata); |
Kalle Valo | 15b7b06 | 2009-03-22 21:57:14 +0200 | [diff] [blame] | 1606 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1607 | return RX_MGMT_CFG80211_ASSOC; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1608 | } |
| 1609 | |
| 1610 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 1611 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1612 | struct ieee80211_mgmt *mgmt, |
| 1613 | size_t len, |
| 1614 | struct ieee80211_rx_status *rx_status, |
Johannes Berg | 98c8fcc | 2008-09-08 17:44:26 +0200 | [diff] [blame] | 1615 | struct ieee802_11_elems *elems, |
| 1616 | bool beacon) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1617 | { |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 1618 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 98c8fcc | 2008-09-08 17:44:26 +0200 | [diff] [blame] | 1619 | int freq; |
Johannes Berg | c2b1345 | 2008-09-11 00:01:55 +0200 | [diff] [blame] | 1620 | struct ieee80211_bss *bss; |
Johannes Berg | fab7d4a | 2008-03-16 18:42:44 +0100 | [diff] [blame] | 1621 | struct ieee80211_channel *channel; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1622 | |
Johannes Berg | 5bda617 | 2008-09-08 11:05:10 +0200 | [diff] [blame] | 1623 | if (elems->ds_params && elems->ds_params_len == 1) |
| 1624 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); |
| 1625 | else |
| 1626 | freq = rx_status->freq; |
| 1627 | |
| 1628 | channel = ieee80211_get_channel(local->hw.wiphy, freq); |
| 1629 | |
| 1630 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) |
| 1631 | return; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1632 | |
Johannes Berg | 98c8fcc | 2008-09-08 17:44:26 +0200 | [diff] [blame] | 1633 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 1634 | channel, beacon); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1635 | if (bss) |
| 1636 | ieee80211_rx_bss_put(local, bss); |
| 1637 | |
| 1638 | if (!sdata->u.mgd.associated) |
Johannes Berg | 98c8fcc | 2008-09-08 17:44:26 +0200 | [diff] [blame] | 1639 | return; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1640 | |
Sujith | c481ec9 | 2009-01-06 09:28:37 +0530 | [diff] [blame] | 1641 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1642 | (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid, |
| 1643 | ETH_ALEN) == 0)) { |
Sujith | c481ec9 | 2009-01-06 09:28:37 +0530 | [diff] [blame] | 1644 | struct ieee80211_channel_sw_ie *sw_elem = |
| 1645 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; |
Johannes Berg | cc32abd | 2009-05-15 11:52:31 +0200 | [diff] [blame] | 1646 | ieee80211_sta_process_chanswitch(sdata, sw_elem, bss); |
Sujith | c481ec9 | 2009-01-06 09:28:37 +0530 | [diff] [blame] | 1647 | } |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1648 | } |
| 1649 | |
| 1650 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 1651 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1652 | struct ieee80211_mgd_work *wk, |
| 1653 | struct ieee80211_mgmt *mgmt, size_t len, |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1654 | struct ieee80211_rx_status *rx_status) |
| 1655 | { |
Kalle Valo | 15b7b06 | 2009-03-22 21:57:14 +0200 | [diff] [blame] | 1656 | struct ieee80211_if_managed *ifmgd; |
Ester Kummer | ae6a44e | 2008-06-27 18:54:48 +0300 | [diff] [blame] | 1657 | size_t baselen; |
| 1658 | struct ieee802_11_elems elems; |
| 1659 | |
Kalle Valo | 15b7b06 | 2009-03-22 21:57:14 +0200 | [diff] [blame] | 1660 | ifmgd = &sdata->u.mgd; |
| 1661 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1662 | ASSERT_MGD_MTX(ifmgd); |
| 1663 | |
Tomas Winkler | 8e7cdbb | 2008-08-03 14:32:01 +0300 | [diff] [blame] | 1664 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
| 1665 | return; /* ignore ProbeResp to foreign address */ |
| 1666 | |
Ester Kummer | ae6a44e | 2008-06-27 18:54:48 +0300 | [diff] [blame] | 1667 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
| 1668 | if (baselen > len) |
| 1669 | return; |
| 1670 | |
| 1671 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, |
| 1672 | &elems); |
| 1673 | |
Johannes Berg | 98c8fcc | 2008-09-08 17:44:26 +0200 | [diff] [blame] | 1674 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
Ron Rindjunsky | 9859b81 | 2008-08-09 03:02:19 +0300 | [diff] [blame] | 1675 | |
| 1676 | /* direct probe may be part of the association flow */ |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1677 | if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) { |
Ron Rindjunsky | 9859b81 | 2008-08-09 03:02:19 +0300 | [diff] [blame] | 1678 | printk(KERN_DEBUG "%s direct probe responded\n", |
| 1679 | sdata->dev->name); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1680 | wk->tries = 0; |
| 1681 | wk->state = IEEE80211_MGD_STATE_AUTH; |
| 1682 | WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE); |
Ron Rindjunsky | 9859b81 | 2008-08-09 03:02:19 +0300 | [diff] [blame] | 1683 | } |
Kalle Valo | 15b7b06 | 2009-03-22 21:57:14 +0200 | [diff] [blame] | 1684 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1685 | if (ifmgd->associated && |
| 1686 | memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 && |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1687 | ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
| 1688 | IEEE80211_STA_CONNECTION_POLL)) { |
| 1689 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | |
| 1690 | IEEE80211_STA_BEACON_POLL); |
Johannes Berg | 4e75184 | 2009-06-10 15:16:52 +0200 | [diff] [blame] | 1691 | mutex_lock(&sdata->local->iflist_mtx); |
| 1692 | ieee80211_recalc_ps(sdata->local, -1); |
| 1693 | mutex_unlock(&sdata->local->iflist_mtx); |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1694 | /* |
| 1695 | * We've received a probe response, but are not sure whether |
| 1696 | * we have or will be receiving any beacons or data, so let's |
| 1697 | * schedule the timers again, just in case. |
| 1698 | */ |
| 1699 | mod_beacon_timer(sdata); |
| 1700 | mod_timer(&ifmgd->conn_mon_timer, |
| 1701 | round_jiffies_up(jiffies + |
| 1702 | IEEE80211_CONNECTION_IDLE_TIME)); |
Johannes Berg | 4e75184 | 2009-06-10 15:16:52 +0200 | [diff] [blame] | 1703 | } |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1704 | } |
| 1705 | |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 1706 | /* |
| 1707 | * This is the canonical list of information elements we care about, |
| 1708 | * the filter code also gives us all changes to the Microsoft OUI |
| 1709 | * (00:50:F2) vendor IE which is used for WMM which we need to track. |
| 1710 | * |
| 1711 | * We implement beacon filtering in software since that means we can |
| 1712 | * avoid processing the frame here and in cfg80211, and userspace |
| 1713 | * will not be able to tell whether the hardware supports it or not. |
| 1714 | * |
| 1715 | * XXX: This list needs to be dynamic -- userspace needs to be able to |
| 1716 | * add items it requires. It also needs to be able to tell us to |
| 1717 | * look out for other vendor IEs. |
| 1718 | */ |
| 1719 | static const u64 care_about_ies = |
Johannes Berg | 1d4df3a | 2009-04-22 11:25:43 +0200 | [diff] [blame] | 1720 | (1ULL << WLAN_EID_COUNTRY) | |
| 1721 | (1ULL << WLAN_EID_ERP_INFO) | |
| 1722 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | |
| 1723 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | |
| 1724 | (1ULL << WLAN_EID_HT_CAPABILITY) | |
| 1725 | (1ULL << WLAN_EID_HT_INFORMATION); |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 1726 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 1727 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1728 | struct ieee80211_mgmt *mgmt, |
| 1729 | size_t len, |
| 1730 | struct ieee80211_rx_status *rx_status) |
| 1731 | { |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 1732 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1733 | size_t baselen; |
| 1734 | struct ieee802_11_elems elems; |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 1735 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 471b3ef | 2007-12-28 14:32:58 +0100 | [diff] [blame] | 1736 | u32 changed = 0; |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 1737 | bool erp_valid, directed_tim = false; |
Johannes Berg | 7a5158e | 2008-10-08 10:59:33 +0200 | [diff] [blame] | 1738 | u8 erp_value = 0; |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 1739 | u32 ncrc; |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1740 | u8 *bssid; |
| 1741 | |
| 1742 | ASSERT_MGD_MTX(ifmgd); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1743 | |
Ester Kummer | ae6a44e | 2008-06-27 18:54:48 +0300 | [diff] [blame] | 1744 | /* Process beacon from the current BSS */ |
| 1745 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; |
| 1746 | if (baselen > len) |
| 1747 | return; |
| 1748 | |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 1749 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1750 | return; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1751 | |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1752 | /* |
| 1753 | * We might have received a number of frames, among them a |
| 1754 | * disassoc frame and a beacon... |
| 1755 | */ |
| 1756 | if (!ifmgd->associated) |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1757 | return; |
| 1758 | |
| 1759 | bssid = ifmgd->associated->cbss.bssid; |
| 1760 | |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1761 | /* |
| 1762 | * And in theory even frames from a different AP we were just |
| 1763 | * associated to a split-second ago! |
| 1764 | */ |
| 1765 | if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1766 | return; |
| 1767 | |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1768 | if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) { |
Jouni Malinen | 9277818 | 2009-05-14 21:15:36 +0300 | [diff] [blame] | 1769 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 1770 | if (net_ratelimit()) { |
| 1771 | printk(KERN_DEBUG "%s: cancelling probereq poll due " |
| 1772 | "to a received beacon\n", sdata->dev->name); |
| 1773 | } |
| 1774 | #endif |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1775 | ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL; |
Johannes Berg | 4e75184 | 2009-06-10 15:16:52 +0200 | [diff] [blame] | 1776 | mutex_lock(&local->iflist_mtx); |
| 1777 | ieee80211_recalc_ps(local, -1); |
| 1778 | mutex_unlock(&local->iflist_mtx); |
Jouni Malinen | 9277818 | 2009-05-14 21:15:36 +0300 | [diff] [blame] | 1779 | } |
| 1780 | |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1781 | /* |
| 1782 | * Push the beacon loss detection into the future since |
| 1783 | * we are processing a beacon from the AP just now. |
| 1784 | */ |
| 1785 | mod_beacon_timer(sdata); |
| 1786 | |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 1787 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
| 1788 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, |
| 1789 | len - baselen, &elems, |
| 1790 | care_about_ies, ncrc); |
| 1791 | |
| 1792 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
Johannes Berg | e7ec86f | 2009-04-18 17:33:24 +0200 | [diff] [blame] | 1793 | directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len, |
| 1794 | ifmgd->aid); |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 1795 | |
Jouni Malinen | 3019667 | 2009-05-19 17:01:43 +0300 | [diff] [blame] | 1796 | if (ncrc != ifmgd->beacon_crc) { |
| 1797 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, |
| 1798 | true); |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 1799 | |
Jouni Malinen | 3019667 | 2009-05-19 17:01:43 +0300 | [diff] [blame] | 1800 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
| 1801 | elems.wmm_param_len); |
| 1802 | } |
Johannes Berg | fe3fa82 | 2008-09-08 11:05:09 +0200 | [diff] [blame] | 1803 | |
Vivek Natarajan | 25c9c87 | 2009-03-02 20:20:30 +0530 | [diff] [blame] | 1804 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
Kalle Valo | 1fb3606 | 2009-02-10 17:09:24 +0200 | [diff] [blame] | 1805 | if (directed_tim) { |
Kalle Valo | 572e001 | 2009-02-10 17:09:31 +0200 | [diff] [blame] | 1806 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
| 1807 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
| 1808 | ieee80211_hw_config(local, |
| 1809 | IEEE80211_CONF_CHANGE_PS); |
| 1810 | ieee80211_send_nullfunc(local, sdata, 0); |
| 1811 | } else { |
| 1812 | local->pspolling = true; |
| 1813 | |
| 1814 | /* |
| 1815 | * Here is assumed that the driver will be |
| 1816 | * able to send ps-poll frame and receive a |
| 1817 | * response even though power save mode is |
| 1818 | * enabled, but some drivers might require |
| 1819 | * to disable power save here. This needs |
| 1820 | * to be investigated. |
| 1821 | */ |
| 1822 | ieee80211_send_pspoll(local, sdata); |
| 1823 | } |
Vivek Natarajan | a97b77b | 2008-12-23 18:39:02 -0800 | [diff] [blame] | 1824 | } |
| 1825 | } |
Johannes Berg | 7a5158e | 2008-10-08 10:59:33 +0200 | [diff] [blame] | 1826 | |
Jouni Malinen | 3019667 | 2009-05-19 17:01:43 +0300 | [diff] [blame] | 1827 | if (ncrc == ifmgd->beacon_crc) |
| 1828 | return; |
| 1829 | ifmgd->beacon_crc = ncrc; |
| 1830 | |
Johannes Berg | 7a5158e | 2008-10-08 10:59:33 +0200 | [diff] [blame] | 1831 | if (elems.erp_info && elems.erp_info_len >= 1) { |
| 1832 | erp_valid = true; |
| 1833 | erp_value = elems.erp_info[0]; |
| 1834 | } else { |
| 1835 | erp_valid = false; |
John W. Linville | 50c4afb | 2008-04-15 14:09:27 -0400 | [diff] [blame] | 1836 | } |
Johannes Berg | 7a5158e | 2008-10-08 10:59:33 +0200 | [diff] [blame] | 1837 | changed |= ieee80211_handle_bss_capability(sdata, |
| 1838 | le16_to_cpu(mgmt->u.beacon.capab_info), |
| 1839 | erp_valid, erp_value); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1840 | |
Ron Rindjunsky | d3c990f | 2007-11-26 16:14:34 +0200 | [diff] [blame] | 1841 | |
Vasanthakumar Thiagarajan | 53d6f81 | 2009-02-11 22:18:49 +0530 | [diff] [blame] | 1842 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
Johannes Berg | ab1faea | 2009-07-01 21:41:17 +0200 | [diff] [blame] | 1843 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) { |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 1844 | struct sta_info *sta; |
| 1845 | struct ieee80211_supported_band *sband; |
| 1846 | u16 ap_ht_cap_flags; |
| 1847 | |
| 1848 | rcu_read_lock(); |
| 1849 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1850 | sta = sta_info_get(local, bssid); |
| 1851 | if (WARN_ON(!sta)) { |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 1852 | rcu_read_unlock(); |
| 1853 | return; |
| 1854 | } |
| 1855 | |
| 1856 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| 1857 | |
| 1858 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
| 1859 | elems.ht_cap_elem, &sta->sta.ht_cap); |
| 1860 | |
| 1861 | ap_ht_cap_flags = sta->sta.ht_cap.cap; |
| 1862 | |
| 1863 | rcu_read_unlock(); |
| 1864 | |
| 1865 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1866 | bssid, ap_ht_cap_flags); |
Ron Rindjunsky | d3c990f | 2007-11-26 16:14:34 +0200 | [diff] [blame] | 1867 | } |
| 1868 | |
Luis R. Rodriguez | 8b19e6c | 2009-07-30 17:38:09 -0700 | [diff] [blame] | 1869 | /* Note: country IE parsing is done for us by cfg80211 */ |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1870 | if (elems.country_elem) { |
Vasanthakumar Thiagarajan | a8302de | 2009-01-09 18:14:15 +0530 | [diff] [blame] | 1871 | /* TODO: IBSS also needs this */ |
| 1872 | if (elems.pwr_constr_elem) |
| 1873 | ieee80211_handle_pwr_constr(sdata, |
| 1874 | le16_to_cpu(mgmt->u.probe_resp.capab_info), |
| 1875 | elems.pwr_constr_elem, |
| 1876 | elems.pwr_constr_elem_len); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1877 | } |
| 1878 | |
Johannes Berg | 471b3ef | 2007-12-28 14:32:58 +0100 | [diff] [blame] | 1879 | ieee80211_bss_info_change_notify(sdata, changed); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1880 | } |
| 1881 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1882 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 1883 | struct sk_buff *skb) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1884 | { |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 1885 | struct ieee80211_local *local = sdata->local; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1886 | struct ieee80211_mgmt *mgmt; |
| 1887 | u16 fc; |
| 1888 | |
| 1889 | if (skb->len < 24) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1890 | return RX_DROP_MONITOR; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1891 | |
| 1892 | mgmt = (struct ieee80211_mgmt *) skb->data; |
| 1893 | fc = le16_to_cpu(mgmt->frame_control); |
| 1894 | |
| 1895 | switch (fc & IEEE80211_FCTL_STYPE) { |
| 1896 | case IEEE80211_STYPE_PROBE_REQ: |
| 1897 | case IEEE80211_STYPE_PROBE_RESP: |
| 1898 | case IEEE80211_STYPE_BEACON: |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1899 | case IEEE80211_STYPE_AUTH: |
| 1900 | case IEEE80211_STYPE_ASSOC_RESP: |
| 1901 | case IEEE80211_STYPE_REASSOC_RESP: |
| 1902 | case IEEE80211_STYPE_DEAUTH: |
| 1903 | case IEEE80211_STYPE_DISASSOC: |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1904 | case IEEE80211_STYPE_ACTION: |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1905 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 1906 | ieee80211_queue_work(&local->hw, &sdata->u.mgd.work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1907 | return RX_QUEUED; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1908 | } |
| 1909 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1910 | return RX_DROP_MONITOR; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1911 | } |
| 1912 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 1913 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1914 | struct sk_buff *skb) |
| 1915 | { |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1916 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1917 | struct ieee80211_rx_status *rx_status; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1918 | struct ieee80211_mgmt *mgmt; |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1919 | struct ieee80211_mgd_work *wk; |
| 1920 | enum rx_mgmt_action rma = RX_MGMT_NONE; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1921 | u16 fc; |
| 1922 | |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1923 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
| 1924 | mgmt = (struct ieee80211_mgmt *) skb->data; |
| 1925 | fc = le16_to_cpu(mgmt->frame_control); |
| 1926 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1927 | mutex_lock(&ifmgd->mtx); |
| 1928 | |
| 1929 | if (ifmgd->associated && |
| 1930 | memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid, |
| 1931 | ETH_ALEN) == 0) { |
| 1932 | switch (fc & IEEE80211_FCTL_STYPE) { |
| 1933 | case IEEE80211_STYPE_BEACON: |
| 1934 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, |
| 1935 | rx_status); |
| 1936 | break; |
| 1937 | case IEEE80211_STYPE_PROBE_RESP: |
| 1938 | ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt, |
| 1939 | skb->len, rx_status); |
| 1940 | break; |
| 1941 | case IEEE80211_STYPE_DEAUTH: |
| 1942 | rma = ieee80211_rx_mgmt_deauth(sdata, NULL, |
| 1943 | mgmt, skb->len); |
| 1944 | break; |
| 1945 | case IEEE80211_STYPE_DISASSOC: |
| 1946 | rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); |
| 1947 | break; |
| 1948 | case IEEE80211_STYPE_ACTION: |
| 1949 | /* XXX: differentiate, can only happen for CSA now! */ |
| 1950 | ieee80211_sta_process_chanswitch(sdata, |
| 1951 | &mgmt->u.action.u.chan_switch.sw_elem, |
| 1952 | ifmgd->associated); |
| 1953 | break; |
| 1954 | } |
| 1955 | mutex_unlock(&ifmgd->mtx); |
| 1956 | |
| 1957 | switch (rma) { |
| 1958 | case RX_MGMT_NONE: |
| 1959 | /* no action */ |
| 1960 | break; |
| 1961 | case RX_MGMT_CFG80211_DEAUTH: |
Johannes Berg | 667503d | 2009-07-07 03:56:11 +0200 | [diff] [blame] | 1962 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, |
| 1963 | NULL); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1964 | break; |
| 1965 | case RX_MGMT_CFG80211_DISASSOC: |
Johannes Berg | 667503d | 2009-07-07 03:56:11 +0200 | [diff] [blame] | 1966 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len, |
| 1967 | NULL); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 1968 | break; |
| 1969 | default: |
| 1970 | WARN(1, "unexpected: %d", rma); |
| 1971 | } |
| 1972 | goto out; |
| 1973 | } |
| 1974 | |
| 1975 | list_for_each_entry(wk, &ifmgd->work_list, list) { |
| 1976 | if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0) |
| 1977 | continue; |
| 1978 | |
| 1979 | switch (fc & IEEE80211_FCTL_STYPE) { |
| 1980 | case IEEE80211_STYPE_PROBE_RESP: |
| 1981 | ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len, |
| 1982 | rx_status); |
| 1983 | break; |
| 1984 | case IEEE80211_STYPE_AUTH: |
| 1985 | rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len); |
| 1986 | break; |
| 1987 | case IEEE80211_STYPE_ASSOC_RESP: |
| 1988 | rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt, |
| 1989 | skb->len, false); |
| 1990 | break; |
| 1991 | case IEEE80211_STYPE_REASSOC_RESP: |
| 1992 | rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt, |
| 1993 | skb->len, true); |
| 1994 | break; |
| 1995 | case IEEE80211_STYPE_DEAUTH: |
| 1996 | rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt, |
| 1997 | skb->len); |
| 1998 | break; |
| 1999 | } |
| 2000 | /* |
| 2001 | * We've processed this frame for that work, so it can't |
| 2002 | * belong to another work struct. |
| 2003 | * NB: this is also required for correctness because the |
| 2004 | * called functions can free 'wk', and for 'rma'! |
| 2005 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2006 | break; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 2007 | } |
| 2008 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2009 | mutex_unlock(&ifmgd->mtx); |
| 2010 | |
| 2011 | switch (rma) { |
| 2012 | case RX_MGMT_NONE: |
| 2013 | /* no action */ |
| 2014 | break; |
| 2015 | case RX_MGMT_CFG80211_AUTH: |
Johannes Berg | cb0b4be | 2009-07-07 03:56:07 +0200 | [diff] [blame] | 2016 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2017 | break; |
| 2018 | case RX_MGMT_CFG80211_ASSOC: |
Johannes Berg | cb0b4be | 2009-07-07 03:56:07 +0200 | [diff] [blame] | 2019 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2020 | break; |
Johannes Berg | 8d8b261 | 2009-07-25 11:58:36 +0200 | [diff] [blame] | 2021 | case RX_MGMT_CFG80211_DEAUTH: |
| 2022 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, NULL); |
| 2023 | break; |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2024 | default: |
| 2025 | WARN(1, "unexpected: %d", rma); |
| 2026 | } |
| 2027 | |
| 2028 | out: |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 2029 | kfree_skb(skb); |
| 2030 | } |
| 2031 | |
Johannes Berg | 9c6bd79 | 2008-09-11 00:01:52 +0200 | [diff] [blame] | 2032 | static void ieee80211_sta_timer(unsigned long data) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 2033 | { |
| 2034 | struct ieee80211_sub_if_data *sdata = |
| 2035 | (struct ieee80211_sub_if_data *) data; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2036 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 2037 | struct ieee80211_local *local = sdata->local; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 2038 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 2039 | if (local->quiescing) { |
| 2040 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); |
| 2041 | return; |
| 2042 | } |
| 2043 | |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 2044 | ieee80211_queue_work(&local->hw, &ifmgd->work); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 2045 | } |
| 2046 | |
Johannes Berg | 9c6bd79 | 2008-09-11 00:01:52 +0200 | [diff] [blame] | 2047 | static void ieee80211_sta_work(struct work_struct *work) |
Johannes Berg | 60f8b39 | 2008-09-08 17:44:22 +0200 | [diff] [blame] | 2048 | { |
| 2049 | struct ieee80211_sub_if_data *sdata = |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2050 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); |
Johannes Berg | 60f8b39 | 2008-09-08 17:44:22 +0200 | [diff] [blame] | 2051 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2052 | struct ieee80211_if_managed *ifmgd; |
Johannes Berg | 60f8b39 | 2008-09-08 17:44:22 +0200 | [diff] [blame] | 2053 | struct sk_buff *skb; |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2054 | struct ieee80211_mgd_work *wk, *tmp; |
| 2055 | LIST_HEAD(free_work); |
| 2056 | enum rx_mgmt_action rma; |
| 2057 | bool anybusy = false; |
Johannes Berg | 60f8b39 | 2008-09-08 17:44:22 +0200 | [diff] [blame] | 2058 | |
| 2059 | if (!netif_running(sdata->dev)) |
| 2060 | return; |
| 2061 | |
Helmut Schaa | fbe9c42 | 2009-07-23 12:14:04 +0200 | [diff] [blame] | 2062 | if (local->scanning) |
Johannes Berg | 60f8b39 | 2008-09-08 17:44:22 +0200 | [diff] [blame] | 2063 | return; |
| 2064 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2065 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
Johannes Berg | 60f8b39 | 2008-09-08 17:44:22 +0200 | [diff] [blame] | 2066 | return; |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 2067 | |
| 2068 | /* |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 2069 | * ieee80211_queue_work() should have picked up most cases, |
| 2070 | * here we'll pick the the rest. |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 2071 | */ |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 2072 | if (WARN(local->suspended, "STA MLME work scheduled while " |
| 2073 | "going to suspend\n")) |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 2074 | return; |
| 2075 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2076 | ifmgd = &sdata->u.mgd; |
Johannes Berg | 60f8b39 | 2008-09-08 17:44:22 +0200 | [diff] [blame] | 2077 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2078 | /* first process frames to avoid timing out while a frame is pending */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2079 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
Johannes Berg | 60f8b39 | 2008-09-08 17:44:22 +0200 | [diff] [blame] | 2080 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
| 2081 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2082 | /* then process the rest of the work */ |
| 2083 | mutex_lock(&ifmgd->mtx); |
Johannes Berg | 60f8b39 | 2008-09-08 17:44:22 +0200 | [diff] [blame] | 2084 | |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 2085 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
| 2086 | IEEE80211_STA_CONNECTION_POLL) && |
| 2087 | ifmgd->associated) { |
Maxim Levitsky | a43abf2 | 2009-07-31 18:54:12 +0300 | [diff] [blame] | 2088 | u8 bssid[ETH_ALEN]; |
| 2089 | |
| 2090 | memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN); |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 2091 | if (time_is_after_jiffies(ifmgd->probe_timeout)) |
| 2092 | run_again(ifmgd, ifmgd->probe_timeout); |
Maxim Levitsky | a43abf2 | 2009-07-31 18:54:12 +0300 | [diff] [blame] | 2093 | |
| 2094 | else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) { |
| 2095 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 2096 | printk(KERN_DEBUG "No probe response from AP %pM" |
| 2097 | " after %dms, try %d\n", bssid, |
| 2098 | (1000 * IEEE80211_PROBE_WAIT)/HZ, |
| 2099 | ifmgd->probe_send_count); |
| 2100 | #endif |
| 2101 | ieee80211_mgd_probe_ap_send(sdata); |
| 2102 | } else { |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 2103 | /* |
| 2104 | * We actually lost the connection ... or did we? |
| 2105 | * Let's make sure! |
| 2106 | */ |
| 2107 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | |
| 2108 | IEEE80211_STA_BEACON_POLL); |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 2109 | printk(KERN_DEBUG "No probe response from AP %pM" |
| 2110 | " after %dms, disconnecting.\n", |
| 2111 | bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ); |
Johannes Berg | e21546a | 2009-08-06 20:41:32 +0200 | [diff] [blame] | 2112 | ieee80211_set_disassoc(sdata, true); |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 2113 | mutex_unlock(&ifmgd->mtx); |
| 2114 | /* |
| 2115 | * must be outside lock due to cfg80211, |
| 2116 | * but that's not a problem. |
| 2117 | */ |
| 2118 | ieee80211_send_deauth_disassoc(sdata, bssid, |
| 2119 | IEEE80211_STYPE_DEAUTH, |
| 2120 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, |
| 2121 | NULL); |
| 2122 | mutex_lock(&ifmgd->mtx); |
| 2123 | } |
| 2124 | } |
| 2125 | |
Johannes Berg | 60f8b39 | 2008-09-08 17:44:22 +0200 | [diff] [blame] | 2126 | |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 2127 | ieee80211_recalc_idle(local); |
| 2128 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2129 | list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) { |
Johannes Berg | ca386f3 | 2009-07-10 02:39:48 +0200 | [diff] [blame] | 2130 | if (time_is_after_jiffies(wk->timeout)) { |
| 2131 | /* |
| 2132 | * This work item isn't supposed to be worked on |
| 2133 | * right now, but take care to adjust the timer |
| 2134 | * properly. |
| 2135 | */ |
| 2136 | run_again(ifmgd, wk->timeout); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2137 | continue; |
Johannes Berg | ca386f3 | 2009-07-10 02:39:48 +0200 | [diff] [blame] | 2138 | } |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2139 | |
| 2140 | switch (wk->state) { |
| 2141 | default: |
| 2142 | WARN_ON(1); |
| 2143 | /* fall through */ |
| 2144 | case IEEE80211_MGD_STATE_IDLE: |
| 2145 | /* nothing */ |
| 2146 | rma = RX_MGMT_NONE; |
| 2147 | break; |
| 2148 | case IEEE80211_MGD_STATE_PROBE: |
| 2149 | rma = ieee80211_direct_probe(sdata, wk); |
| 2150 | break; |
| 2151 | case IEEE80211_MGD_STATE_AUTH: |
| 2152 | rma = ieee80211_authenticate(sdata, wk); |
| 2153 | break; |
| 2154 | case IEEE80211_MGD_STATE_ASSOC: |
| 2155 | rma = ieee80211_associate(sdata, wk); |
| 2156 | break; |
| 2157 | } |
| 2158 | |
| 2159 | switch (rma) { |
| 2160 | case RX_MGMT_NONE: |
| 2161 | /* no action required */ |
| 2162 | break; |
| 2163 | case RX_MGMT_CFG80211_AUTH_TO: |
| 2164 | case RX_MGMT_CFG80211_ASSOC_TO: |
| 2165 | list_del(&wk->list); |
| 2166 | list_add(&wk->list, &free_work); |
| 2167 | wk->tries = rma; /* small abuse but only local */ |
| 2168 | break; |
| 2169 | default: |
| 2170 | WARN(1, "unexpected: %d", rma); |
| 2171 | } |
| 2172 | } |
| 2173 | |
Jouni Malinen | 5bf6fcc | 2009-08-25 17:44:28 +0300 | [diff] [blame] | 2174 | list_for_each_entry(wk, &ifmgd->work_list, list) { |
| 2175 | if (wk->state != IEEE80211_MGD_STATE_IDLE) { |
| 2176 | anybusy = true; |
| 2177 | break; |
| 2178 | } |
| 2179 | } |
| 2180 | if (!anybusy && |
| 2181 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) |
| 2182 | ieee80211_queue_delayed_work(&local->hw, |
| 2183 | &local->scan_work, |
| 2184 | round_jiffies_relative(0)); |
| 2185 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2186 | mutex_unlock(&ifmgd->mtx); |
| 2187 | |
| 2188 | list_for_each_entry_safe(wk, tmp, &free_work, list) { |
| 2189 | switch (wk->tries) { |
| 2190 | case RX_MGMT_CFG80211_AUTH_TO: |
| 2191 | cfg80211_send_auth_timeout(sdata->dev, |
Johannes Berg | cb0b4be | 2009-07-07 03:56:07 +0200 | [diff] [blame] | 2192 | wk->bss->cbss.bssid); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2193 | break; |
| 2194 | case RX_MGMT_CFG80211_ASSOC_TO: |
Johannes Berg | cb0b4be | 2009-07-07 03:56:07 +0200 | [diff] [blame] | 2195 | cfg80211_send_assoc_timeout(sdata->dev, |
| 2196 | wk->bss->cbss.bssid); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2197 | break; |
| 2198 | default: |
| 2199 | WARN(1, "unexpected: %d", wk->tries); |
| 2200 | } |
| 2201 | |
| 2202 | list_del(&wk->list); |
| 2203 | kfree(wk); |
| 2204 | } |
| 2205 | |
| 2206 | ieee80211_recalc_idle(local); |
Johannes Berg | 60f8b39 | 2008-09-08 17:44:22 +0200 | [diff] [blame] | 2207 | } |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 2208 | |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 2209 | static void ieee80211_sta_bcn_mon_timer(unsigned long data) |
| 2210 | { |
| 2211 | struct ieee80211_sub_if_data *sdata = |
| 2212 | (struct ieee80211_sub_if_data *) data; |
| 2213 | struct ieee80211_local *local = sdata->local; |
| 2214 | |
| 2215 | if (local->quiescing) |
| 2216 | return; |
| 2217 | |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 2218 | ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work); |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 2219 | } |
| 2220 | |
| 2221 | static void ieee80211_sta_conn_mon_timer(unsigned long data) |
| 2222 | { |
| 2223 | struct ieee80211_sub_if_data *sdata = |
| 2224 | (struct ieee80211_sub_if_data *) data; |
| 2225 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 2226 | struct ieee80211_local *local = sdata->local; |
| 2227 | |
| 2228 | if (local->quiescing) |
| 2229 | return; |
| 2230 | |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 2231 | ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 2232 | } |
| 2233 | |
| 2234 | static void ieee80211_sta_monitor_work(struct work_struct *work) |
| 2235 | { |
| 2236 | struct ieee80211_sub_if_data *sdata = |
| 2237 | container_of(work, struct ieee80211_sub_if_data, |
| 2238 | u.mgd.monitor_work); |
| 2239 | |
| 2240 | ieee80211_mgd_probe_ap(sdata, false); |
| 2241 | } |
| 2242 | |
Johannes Berg | a1678f8 | 2008-09-11 00:01:47 +0200 | [diff] [blame] | 2243 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
| 2244 | { |
Kalle Valo | ad93568 | 2009-04-19 08:47:19 +0300 | [diff] [blame] | 2245 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 2246 | sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL | |
| 2247 | IEEE80211_STA_CONNECTION_POLL); |
Kalle Valo | ad93568 | 2009-04-19 08:47:19 +0300 | [diff] [blame] | 2248 | |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 2249 | /* let's probe the connection once */ |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 2250 | ieee80211_queue_work(&sdata->local->hw, |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 2251 | &sdata->u.mgd.monitor_work); |
| 2252 | /* and do all the other regular work too */ |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 2253 | ieee80211_queue_work(&sdata->local->hw, |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2254 | &sdata->u.mgd.work); |
Kalle Valo | ad93568 | 2009-04-19 08:47:19 +0300 | [diff] [blame] | 2255 | } |
Johannes Berg | a1678f8 | 2008-09-11 00:01:47 +0200 | [diff] [blame] | 2256 | } |
| 2257 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 2258 | #ifdef CONFIG_PM |
| 2259 | void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata) |
| 2260 | { |
| 2261 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 2262 | |
| 2263 | /* |
| 2264 | * we need to use atomic bitops for the running bits |
| 2265 | * only because both timers might fire at the same |
| 2266 | * time -- the code here is properly synchronised. |
| 2267 | */ |
| 2268 | |
| 2269 | cancel_work_sync(&ifmgd->work); |
| 2270 | cancel_work_sync(&ifmgd->beacon_loss_work); |
| 2271 | if (del_timer_sync(&ifmgd->timer)) |
| 2272 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); |
| 2273 | |
| 2274 | cancel_work_sync(&ifmgd->chswitch_work); |
| 2275 | if (del_timer_sync(&ifmgd->chswitch_timer)) |
| 2276 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 2277 | |
| 2278 | cancel_work_sync(&ifmgd->monitor_work); |
| 2279 | /* these will just be re-established on connection */ |
| 2280 | del_timer_sync(&ifmgd->conn_mon_timer); |
| 2281 | del_timer_sync(&ifmgd->bcn_mon_timer); |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 2282 | } |
| 2283 | |
| 2284 | void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) |
| 2285 | { |
| 2286 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 2287 | |
| 2288 | if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running)) |
| 2289 | add_timer(&ifmgd->timer); |
| 2290 | if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running)) |
| 2291 | add_timer(&ifmgd->chswitch_timer); |
| 2292 | } |
| 2293 | #endif |
| 2294 | |
Johannes Berg | 9c6bd79 | 2008-09-11 00:01:52 +0200 | [diff] [blame] | 2295 | /* interface setup */ |
| 2296 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) |
| 2297 | { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2298 | struct ieee80211_if_managed *ifmgd; |
Johannes Berg | 9c6bd79 | 2008-09-11 00:01:52 +0200 | [diff] [blame] | 2299 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2300 | ifmgd = &sdata->u.mgd; |
| 2301 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 2302 | INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2303 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); |
Kalle Valo | 04de838 | 2009-03-22 21:57:35 +0200 | [diff] [blame] | 2304 | INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2305 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
Johannes Berg | 9c6bd79 | 2008-09-11 00:01:52 +0200 | [diff] [blame] | 2306 | (unsigned long) sdata); |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 2307 | setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, |
| 2308 | (unsigned long) sdata); |
| 2309 | setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, |
| 2310 | (unsigned long) sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2311 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
Sujith | c481ec9 | 2009-01-06 09:28:37 +0530 | [diff] [blame] | 2312 | (unsigned long) sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2313 | skb_queue_head_init(&ifmgd->skb_queue); |
Johannes Berg | 9c6bd79 | 2008-09-11 00:01:52 +0200 | [diff] [blame] | 2314 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2315 | INIT_LIST_HEAD(&ifmgd->work_list); |
| 2316 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2317 | ifmgd->capab = WLAN_CAPABILITY_ESS; |
Johannes Berg | ab1faea | 2009-07-01 21:41:17 +0200 | [diff] [blame] | 2318 | ifmgd->flags = 0; |
Johannes Berg | 176be72 | 2009-03-12 23:49:28 +0100 | [diff] [blame] | 2319 | if (sdata->local->hw.queues >= 4) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2320 | ifmgd->flags |= IEEE80211_STA_WMM_ENABLED; |
Johannes Berg | bbbdff9 | 2009-04-16 13:27:42 +0200 | [diff] [blame] | 2321 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2322 | mutex_init(&ifmgd->mtx); |
Johannes Berg | 9c6bd79 | 2008-09-11 00:01:52 +0200 | [diff] [blame] | 2323 | } |
| 2324 | |
| 2325 | /* scan finished notification */ |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 2326 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) |
| 2327 | { |
| 2328 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; |
Johannes Berg | a1678f8 | 2008-09-11 00:01:47 +0200 | [diff] [blame] | 2329 | |
| 2330 | /* Restart STA timers */ |
| 2331 | rcu_read_lock(); |
| 2332 | list_for_each_entry_rcu(sdata, &local->interfaces, list) |
| 2333 | ieee80211_restart_sta_timer(sdata); |
| 2334 | rcu_read_unlock(); |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 2335 | } |
Johannes Berg | 10f644a | 2009-04-16 13:17:25 +0200 | [diff] [blame] | 2336 | |
| 2337 | int ieee80211_max_network_latency(struct notifier_block *nb, |
| 2338 | unsigned long data, void *dummy) |
| 2339 | { |
| 2340 | s32 latency_usec = (s32) data; |
| 2341 | struct ieee80211_local *local = |
| 2342 | container_of(nb, struct ieee80211_local, |
| 2343 | network_latency_notifier); |
| 2344 | |
| 2345 | mutex_lock(&local->iflist_mtx); |
| 2346 | ieee80211_recalc_ps(local, latency_usec); |
| 2347 | mutex_unlock(&local->iflist_mtx); |
| 2348 | |
| 2349 | return 0; |
| 2350 | } |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2351 | |
| 2352 | /* config hooks */ |
| 2353 | int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, |
| 2354 | struct cfg80211_auth_request *req) |
| 2355 | { |
| 2356 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 2357 | const u8 *ssid; |
| 2358 | struct ieee80211_mgd_work *wk; |
| 2359 | u16 auth_alg; |
| 2360 | |
| 2361 | switch (req->auth_type) { |
| 2362 | case NL80211_AUTHTYPE_OPEN_SYSTEM: |
| 2363 | auth_alg = WLAN_AUTH_OPEN; |
| 2364 | break; |
| 2365 | case NL80211_AUTHTYPE_SHARED_KEY: |
| 2366 | auth_alg = WLAN_AUTH_SHARED_KEY; |
| 2367 | break; |
| 2368 | case NL80211_AUTHTYPE_FT: |
| 2369 | auth_alg = WLAN_AUTH_FT; |
| 2370 | break; |
| 2371 | case NL80211_AUTHTYPE_NETWORK_EAP: |
| 2372 | auth_alg = WLAN_AUTH_LEAP; |
| 2373 | break; |
| 2374 | default: |
| 2375 | return -EOPNOTSUPP; |
| 2376 | } |
| 2377 | |
| 2378 | wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL); |
| 2379 | if (!wk) |
| 2380 | return -ENOMEM; |
| 2381 | |
| 2382 | wk->bss = (void *)req->bss; |
| 2383 | |
| 2384 | if (req->ie && req->ie_len) { |
| 2385 | memcpy(wk->ie, req->ie, req->ie_len); |
| 2386 | wk->ie_len = req->ie_len; |
| 2387 | } |
| 2388 | |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 2389 | if (req->key && req->key_len) { |
| 2390 | wk->key_len = req->key_len; |
| 2391 | wk->key_idx = req->key_idx; |
| 2392 | memcpy(wk->key, req->key, req->key_len); |
| 2393 | } |
| 2394 | |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2395 | ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
| 2396 | memcpy(wk->ssid, ssid + 2, ssid[1]); |
| 2397 | wk->ssid_len = ssid[1]; |
| 2398 | |
| 2399 | wk->state = IEEE80211_MGD_STATE_PROBE; |
| 2400 | wk->auth_alg = auth_alg; |
Johannes Berg | 4853184 | 2009-07-23 16:50:16 +0200 | [diff] [blame] | 2401 | wk->timeout = jiffies; /* run right away */ |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2402 | |
| 2403 | /* |
| 2404 | * XXX: if still associated need to tell AP that we're going |
| 2405 | * to sleep and then change channel etc. |
| 2406 | */ |
| 2407 | sdata->local->oper_channel = req->bss->channel; |
| 2408 | ieee80211_hw_config(sdata->local, 0); |
| 2409 | |
| 2410 | mutex_lock(&ifmgd->mtx); |
| 2411 | list_add(&wk->list, &sdata->u.mgd.work_list); |
| 2412 | mutex_unlock(&ifmgd->mtx); |
| 2413 | |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 2414 | ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2415 | return 0; |
| 2416 | } |
| 2417 | |
| 2418 | int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, |
| 2419 | struct cfg80211_assoc_request *req) |
| 2420 | { |
| 2421 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 2422 | struct ieee80211_mgd_work *wk, *found = NULL; |
| 2423 | int i, err; |
| 2424 | |
| 2425 | mutex_lock(&ifmgd->mtx); |
| 2426 | |
| 2427 | list_for_each_entry(wk, &ifmgd->work_list, list) { |
| 2428 | if (&wk->bss->cbss == req->bss && |
| 2429 | wk->state == IEEE80211_MGD_STATE_IDLE) { |
| 2430 | found = wk; |
| 2431 | break; |
| 2432 | } |
| 2433 | } |
| 2434 | |
| 2435 | if (!found) { |
| 2436 | err = -ENOLINK; |
| 2437 | goto out; |
| 2438 | } |
| 2439 | |
| 2440 | list_del(&found->list); |
| 2441 | |
| 2442 | wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL); |
| 2443 | if (!wk) { |
| 2444 | list_add(&found->list, &ifmgd->work_list); |
| 2445 | err = -ENOMEM; |
| 2446 | goto out; |
| 2447 | } |
| 2448 | |
| 2449 | list_add(&wk->list, &ifmgd->work_list); |
| 2450 | |
| 2451 | ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N; |
| 2452 | |
| 2453 | for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) |
| 2454 | if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || |
| 2455 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || |
| 2456 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) |
| 2457 | ifmgd->flags |= IEEE80211_STA_DISABLE_11N; |
| 2458 | |
| 2459 | sdata->local->oper_channel = req->bss->channel; |
| 2460 | ieee80211_hw_config(sdata->local, 0); |
| 2461 | |
| 2462 | if (req->ie && req->ie_len) { |
| 2463 | memcpy(wk->ie, req->ie, req->ie_len); |
| 2464 | wk->ie_len = req->ie_len; |
| 2465 | } else |
| 2466 | wk->ie_len = 0; |
| 2467 | |
| 2468 | if (req->prev_bssid) |
| 2469 | memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN); |
| 2470 | |
| 2471 | wk->state = IEEE80211_MGD_STATE_ASSOC; |
| 2472 | wk->tries = 0; |
Johannes Berg | 4853184 | 2009-07-23 16:50:16 +0200 | [diff] [blame] | 2473 | wk->timeout = jiffies; /* run right away */ |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2474 | |
| 2475 | if (req->use_mfp) { |
| 2476 | ifmgd->mfp = IEEE80211_MFP_REQUIRED; |
| 2477 | ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; |
| 2478 | } else { |
| 2479 | ifmgd->mfp = IEEE80211_MFP_DISABLED; |
| 2480 | ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; |
| 2481 | } |
| 2482 | |
| 2483 | if (req->crypto.control_port) |
| 2484 | ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; |
| 2485 | else |
| 2486 | ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; |
| 2487 | |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 2488 | ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2489 | |
| 2490 | err = 0; |
| 2491 | |
| 2492 | out: |
| 2493 | mutex_unlock(&ifmgd->mtx); |
| 2494 | return err; |
| 2495 | } |
| 2496 | |
| 2497 | int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 667503d | 2009-07-07 03:56:11 +0200 | [diff] [blame] | 2498 | struct cfg80211_deauth_request *req, |
| 2499 | void *cookie) |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2500 | { |
| 2501 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 2502 | struct ieee80211_mgd_work *wk; |
| 2503 | const u8 *bssid = NULL; |
| 2504 | |
| 2505 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
| 2506 | sdata->dev->name, req->reason_code); |
| 2507 | |
| 2508 | mutex_lock(&ifmgd->mtx); |
| 2509 | |
| 2510 | if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) { |
| 2511 | bssid = req->bss->bssid; |
Johannes Berg | e21546a | 2009-08-06 20:41:32 +0200 | [diff] [blame] | 2512 | ieee80211_set_disassoc(sdata, true); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2513 | } else list_for_each_entry(wk, &ifmgd->work_list, list) { |
| 2514 | if (&wk->bss->cbss == req->bss) { |
| 2515 | bssid = req->bss->bssid; |
| 2516 | list_del(&wk->list); |
| 2517 | kfree(wk); |
| 2518 | break; |
| 2519 | } |
| 2520 | } |
| 2521 | |
Johannes Berg | 8d8b261 | 2009-07-25 11:58:36 +0200 | [diff] [blame] | 2522 | /* |
| 2523 | * cfg80211 should catch this ... but it's racy since |
| 2524 | * we can receive a deauth frame, process it, hand it |
| 2525 | * to cfg80211 while that's in a locked section already |
| 2526 | * trying to tell us that the user wants to disconnect. |
| 2527 | */ |
| 2528 | if (!bssid) { |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2529 | mutex_unlock(&ifmgd->mtx); |
| 2530 | return -ENOLINK; |
| 2531 | } |
| 2532 | |
| 2533 | mutex_unlock(&ifmgd->mtx); |
| 2534 | |
| 2535 | ieee80211_send_deauth_disassoc(sdata, bssid, |
Johannes Berg | 667503d | 2009-07-07 03:56:11 +0200 | [diff] [blame] | 2536 | IEEE80211_STYPE_DEAUTH, req->reason_code, |
| 2537 | cookie); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2538 | |
| 2539 | return 0; |
| 2540 | } |
| 2541 | |
| 2542 | int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 667503d | 2009-07-07 03:56:11 +0200 | [diff] [blame] | 2543 | struct cfg80211_disassoc_request *req, |
| 2544 | void *cookie) |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2545 | { |
| 2546 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 2547 | |
| 2548 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
| 2549 | sdata->dev->name, req->reason_code); |
| 2550 | |
| 2551 | mutex_lock(&ifmgd->mtx); |
| 2552 | |
Johannes Berg | 8d8b261 | 2009-07-25 11:58:36 +0200 | [diff] [blame] | 2553 | /* |
| 2554 | * cfg80211 should catch this ... but it's racy since |
| 2555 | * we can receive a disassoc frame, process it, hand it |
| 2556 | * to cfg80211 while that's in a locked section already |
| 2557 | * trying to tell us that the user wants to disconnect. |
| 2558 | */ |
| 2559 | if (&ifmgd->associated->cbss != req->bss) { |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2560 | mutex_unlock(&ifmgd->mtx); |
| 2561 | return -ENOLINK; |
| 2562 | } |
| 2563 | |
Johannes Berg | e21546a | 2009-08-06 20:41:32 +0200 | [diff] [blame] | 2564 | ieee80211_set_disassoc(sdata, false); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2565 | |
| 2566 | mutex_unlock(&ifmgd->mtx); |
| 2567 | |
| 2568 | ieee80211_send_deauth_disassoc(sdata, req->bss->bssid, |
Johannes Berg | 667503d | 2009-07-07 03:56:11 +0200 | [diff] [blame] | 2569 | IEEE80211_STYPE_DISASSOC, req->reason_code, |
| 2570 | cookie); |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2571 | return 0; |
| 2572 | } |