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Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001/*
Rui Paulo264d9b72009-11-09 23:46:58 +00002 * Copyright (c) 2008, 2009 open80211s Ltd.
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01003 * Author: Luis Carlos Cobo <luisca@cozybit.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09009#include <linux/gfp.h>
Johannes Berg902acc72008-02-23 15:17:19 +010010#include <linux/kernel.h>
11#include <linux/random.h>
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010012#include "ieee80211_i.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040013#include "rate.h"
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010014#include "mesh.h"
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010015
Thomas Pedersen8db09852011-08-12 20:01:00 -070016#define PLINK_GET_LLID(p) (p + 2)
17#define PLINK_GET_PLID(p) (p + 4)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010018
19#define mod_plink_timer(s, t) (mod_timer(&s->plink_timer, \
20 jiffies + HZ * t / 1000))
21
Ashok Nagarajan3d4f9692012-03-06 12:48:30 -080022/* We only need a valid sta if user configured a minimum rssi_threshold. */
23#define rssi_threshold_check(sta, sdata) \
Ashok Nagarajan55335132012-02-28 17:04:08 -080024 (sdata->u.mesh.mshcfg.rssi_threshold == 0 ||\
Ashok Nagarajan3d4f9692012-03-06 12:48:30 -080025 (sta && (s8) -ewma_read(&sta->avg_signal) > \
26 sdata->u.mesh.mshcfg.rssi_threshold))
Ashok Nagarajan55335132012-02-28 17:04:08 -080027
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010028enum plink_event {
29 PLINK_UNDEFINED,
30 OPN_ACPT,
31 OPN_RJCT,
32 OPN_IGNR,
33 CNF_ACPT,
34 CNF_RJCT,
35 CNF_IGNR,
36 CLS_ACPT,
37 CLS_IGNR
38};
39
Thomas Pedersen95e48ad2013-02-16 10:41:05 -080040static const char * const mplstates[] = {
41 [NL80211_PLINK_LISTEN] = "LISTEN",
42 [NL80211_PLINK_OPN_SNT] = "OPN-SNT",
43 [NL80211_PLINK_OPN_RCVD] = "OPN-RCVD",
44 [NL80211_PLINK_CNF_RCVD] = "CNF_RCVD",
45 [NL80211_PLINK_ESTAB] = "ESTAB",
46 [NL80211_PLINK_HOLDING] = "HOLDING",
47 [NL80211_PLINK_BLOCKED] = "BLOCKED"
48};
49
50static const char * const mplevents[] = {
51 [PLINK_UNDEFINED] = "NONE",
52 [OPN_ACPT] = "OPN_ACPT",
53 [OPN_RJCT] = "OPN_RJCT",
54 [OPN_IGNR] = "OPN_IGNR",
55 [CNF_ACPT] = "CNF_ACPT",
56 [CNF_RJCT] = "CNF_RJCT",
57 [CNF_IGNR] = "CNF_IGNR",
58 [CLS_ACPT] = "CLS_ACPT",
59 [CLS_IGNR] = "CLS_IGNR"
60};
61
Thomas Pedersenba4a14e2011-09-20 13:43:32 -070062static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
Johannes Bergbf7cd942013-02-15 14:40:31 +010063 enum ieee80211_self_protected_actioncode action,
64 u8 *da, __le16 llid, __le16 plid, __le16 reason);
Thomas Pedersenba4a14e2011-09-20 13:43:32 -070065
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010066/**
67 * mesh_plink_fsm_restart - restart a mesh peer link finite state machine
68 *
Rui Paulo23c7a292009-11-09 23:46:42 +000069 * @sta: mesh peer link to restart
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010070 *
Johannes Berg07346f812008-05-03 01:02:02 +020071 * Locking: this function must be called holding sta->lock
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010072 */
73static inline void mesh_plink_fsm_restart(struct sta_info *sta)
74{
Javier Cardona57cf8042011-05-13 10:45:43 -070075 sta->plink_state = NL80211_PLINK_LISTEN;
Luis Carlos Cobo37659ff2008-02-29 12:13:38 -080076 sta->llid = sta->plid = sta->reason = 0;
77 sta->plink_retries = 0;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010078}
79
Thomas Pedersen3b144652013-01-26 16:39:55 -080080/*
81 * mesh_set_short_slot_time - enable / disable ERP short slot time.
82 *
83 * The standard indirectly mandates mesh STAs to turn off short slot time by
84 * disallowing advertising this (802.11-2012 8.4.1.4), but that doesn't mean we
85 * can't be sneaky about it. Enable short slot time if all mesh STAs in the
86 * MBSS support ERP rates.
87 *
88 * Returns BSS_CHANGED_ERP_SLOT or 0 for no change.
89 */
90static u32 mesh_set_short_slot_time(struct ieee80211_sub_if_data *sdata)
91{
92 struct ieee80211_local *local = sdata->local;
93 enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
94 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
95 struct sta_info *sta;
96 u32 erp_rates = 0, changed = 0;
97 int i;
98 bool short_slot = false;
99
100 if (band == IEEE80211_BAND_5GHZ) {
101 /* (IEEE 802.11-2012 19.4.5) */
102 short_slot = true;
103 goto out;
104 } else if (band != IEEE80211_BAND_2GHZ ||
105 (band == IEEE80211_BAND_2GHZ &&
106 local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
107 goto out;
108
109 for (i = 0; i < sband->n_bitrates; i++)
110 if (sband->bitrates[i].flags & IEEE80211_RATE_ERP_G)
111 erp_rates |= BIT(i);
112
113 if (!erp_rates)
114 goto out;
115
116 rcu_read_lock();
117 list_for_each_entry_rcu(sta, &local->sta_list, list) {
118 if (sdata != sta->sdata ||
119 sta->plink_state != NL80211_PLINK_ESTAB)
120 continue;
121
122 short_slot = false;
123 if (erp_rates & sta->sta.supp_rates[band])
124 short_slot = true;
125 else
126 break;
127 }
128 rcu_read_unlock();
129
130out:
131 if (sdata->vif.bss_conf.use_short_slot != short_slot) {
132 sdata->vif.bss_conf.use_short_slot = short_slot;
133 changed = BSS_CHANGED_ERP_SLOT;
134 mpl_dbg(sdata, "mesh_plink %pM: ERP short slot time %d\n",
135 sdata->vif.addr, short_slot);
136 }
137 return changed;
138}
139
Ben Hutchings2c530402012-07-10 10:55:09 +0000140/**
Ashok Nagarajancbf93222012-05-07 21:00:31 -0700141 * mesh_set_ht_prot_mode - set correct HT protection mode
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700142 *
Ashok Nagarajancbf93222012-05-07 21:00:31 -0700143 * Section 9.23.3.5 of IEEE 80211-2012 describes the protection rules for HT
144 * mesh STA in a MBSS. Three HT protection modes are supported for now, non-HT
145 * mixed mode, 20MHz-protection and no-protection mode. non-HT mixed mode is
146 * selected if any non-HT peers are present in our MBSS. 20MHz-protection mode
147 * is selected if all peers in our 20/40MHz MBSS support HT and atleast one
148 * HT20 peer is present. Otherwise no-protection mode is selected.
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700149 */
150static u32 mesh_set_ht_prot_mode(struct ieee80211_sub_if_data *sdata)
151{
152 struct ieee80211_local *local = sdata->local;
153 struct sta_info *sta;
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700154 u16 ht_opmode;
155 bool non_ht_sta = false, ht20_sta = false;
156
Simon Wunderlich0418a442013-05-16 13:00:31 +0200157 switch (sdata->vif.bss_conf.chandef.width) {
158 case NL80211_CHAN_WIDTH_20_NOHT:
159 case NL80211_CHAN_WIDTH_5:
160 case NL80211_CHAN_WIDTH_10:
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700161 return 0;
Simon Wunderlich0418a442013-05-16 13:00:31 +0200162 default:
163 break;
164 }
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700165
166 rcu_read_lock();
167 list_for_each_entry_rcu(sta, &local->sta_list, list) {
Ashok Nagarajancbf93222012-05-07 21:00:31 -0700168 if (sdata != sta->sdata ||
169 sta->plink_state != NL80211_PLINK_ESTAB)
170 continue;
171
Thomas Pedersen52ac8c42013-02-16 10:41:04 -0800172 if (sta->sta.bandwidth > IEEE80211_STA_RX_BW_20)
173 continue;
174
175 if (!sta->sta.ht_cap.ht_supported) {
176 mpl_dbg(sdata, "nonHT sta (%pM) is present\n",
177 sta->sta.addr);
Ashok Nagarajancbf93222012-05-07 21:00:31 -0700178 non_ht_sta = true;
Ashok Nagarajancbf93222012-05-07 21:00:31 -0700179 break;
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700180 }
Thomas Pedersen52ac8c42013-02-16 10:41:04 -0800181
182 mpl_dbg(sdata, "HT20 sta (%pM) is present\n", sta->sta.addr);
183 ht20_sta = true;
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700184 }
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700185 rcu_read_unlock();
186
187 if (non_ht_sta)
188 ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED;
Johannes Berg466f3102012-07-25 13:51:49 +0200189 else if (ht20_sta &&
Johannes Berg4bf88532012-11-09 11:39:59 +0100190 sdata->vif.bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700191 ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_20MHZ;
192 else
193 ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
194
Thomas Pedersen52ac8c42013-02-16 10:41:04 -0800195 if (sdata->vif.bss_conf.ht_operation_mode == ht_opmode)
196 return 0;
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700197
Thomas Pedersen52ac8c42013-02-16 10:41:04 -0800198 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
199 sdata->u.mesh.mshcfg.ht_opmode = ht_opmode;
200 mpl_dbg(sdata, "selected new HT protection mode %d\n", ht_opmode);
201 return BSS_CHANGED_HT;
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700202}
203
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100204/**
John W. Linvillec9370192010-06-21 17:14:07 -0400205 * __mesh_plink_deactivate - deactivate mesh peer link
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100206 *
207 * @sta: mesh peer link to deactivate
208 *
209 * All mesh paths with this peer as next hop will be flushed
Marco Porschdf323812012-08-08 07:58:43 +0200210 * Returns beacon changed flag if the beacon content changed.
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100211 *
Johannes Berg07346f812008-05-03 01:02:02 +0200212 * Locking: the caller must hold sta->lock
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100213 */
Marco Porschdf323812012-08-08 07:58:43 +0200214static u32 __mesh_plink_deactivate(struct sta_info *sta)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100215{
Johannes Bergd0709a62008-02-25 16:27:46 +0100216 struct ieee80211_sub_if_data *sdata = sta->sdata;
Marco Porschdf323812012-08-08 07:58:43 +0200217 u32 changed = 0;
Johannes Bergd0709a62008-02-25 16:27:46 +0100218
Marco Porschdf323812012-08-08 07:58:43 +0200219 if (sta->plink_state == NL80211_PLINK_ESTAB)
220 changed = mesh_plink_dec_estab_count(sdata);
Javier Cardona57cf8042011-05-13 10:45:43 -0700221 sta->plink_state = NL80211_PLINK_BLOCKED;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100222 mesh_path_flush_by_nexthop(sta);
John W. Linvillec9370192010-06-21 17:14:07 -0400223
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100224 ieee80211_mps_sta_status_update(sta);
Thomas Pedersen39886b62013-02-13 12:14:19 -0800225 changed |= ieee80211_mps_local_status_update(sdata);
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100226
Marco Porschdf323812012-08-08 07:58:43 +0200227 return changed;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100228}
229
Johannes Berg902acc72008-02-23 15:17:19 +0100230/**
John W. Linvillec9370192010-06-21 17:14:07 -0400231 * mesh_plink_deactivate - deactivate mesh peer link
Johannes Berg902acc72008-02-23 15:17:19 +0100232 *
233 * @sta: mesh peer link to deactivate
234 *
235 * All mesh paths with this peer as next hop will be flushed
236 */
Thomas Pedersen45b50282013-02-06 10:17:21 -0800237u32 mesh_plink_deactivate(struct sta_info *sta)
Johannes Berg902acc72008-02-23 15:17:19 +0100238{
John W. Linvillec9370192010-06-21 17:14:07 -0400239 struct ieee80211_sub_if_data *sdata = sta->sdata;
Marco Porschdf323812012-08-08 07:58:43 +0200240 u32 changed;
John W. Linvillec9370192010-06-21 17:14:07 -0400241
Johannes Berg07346f812008-05-03 01:02:02 +0200242 spin_lock_bh(&sta->lock);
Marco Porschdf323812012-08-08 07:58:43 +0200243 changed = __mesh_plink_deactivate(sta);
Thomas Pedersenba4a14e2011-09-20 13:43:32 -0700244 sta->reason = cpu_to_le16(WLAN_REASON_MESH_PEER_CANCELED);
245 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
246 sta->sta.addr, sta->llid, sta->plid,
247 sta->reason);
Johannes Berg07346f812008-05-03 01:02:02 +0200248 spin_unlock_bh(&sta->lock);
John W. Linvillec9370192010-06-21 17:14:07 -0400249
Thomas Pedersen45b50282013-02-06 10:17:21 -0800250 return changed;
Johannes Berg902acc72008-02-23 15:17:19 +0100251}
252
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200253static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
Johannes Bergbf7cd942013-02-15 14:40:31 +0100254 enum ieee80211_self_protected_actioncode action,
255 u8 *da, __le16 llid, __le16 plid, __le16 reason)
256{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200257 struct ieee80211_local *local = sdata->local;
Thomas Pedersen3b69a9c2011-10-26 14:47:25 -0700258 struct sk_buff *skb;
Thomas Pedersene7570df2012-08-03 12:21:34 -0700259 struct ieee80211_tx_info *info;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100260 struct ieee80211_mgmt *mgmt;
261 bool include_plid = false;
Thomas Pedersen8db09852011-08-12 20:01:00 -0700262 u16 peering_proto = 0;
Thomas Pedersen3b69a9c2011-10-26 14:47:25 -0700263 u8 *pos, ie_len = 4;
264 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.self_prot) +
265 sizeof(mgmt->u.action.u.self_prot);
Thomas Pedersenf609a432012-08-03 12:21:35 -0700266 int err = -ENOMEM;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100267
Javier Cardona65e8b0c2012-01-17 18:17:46 -0800268 skb = dev_alloc_skb(local->tx_headroom +
Thomas Pedersen3b69a9c2011-10-26 14:47:25 -0700269 hdr_len +
270 2 + /* capability info */
271 2 + /* AID */
272 2 + 8 + /* supported rates */
273 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
274 2 + sdata->u.mesh.mesh_id_len +
275 2 + sizeof(struct ieee80211_meshconf_ie) +
Thomas Pedersen176f3602011-10-26 14:47:27 -0700276 2 + sizeof(struct ieee80211_ht_cap) +
Johannes Berg074d46d2012-03-15 19:45:16 +0100277 2 + sizeof(struct ieee80211_ht_operation) +
Thomas Pedersen3b69a9c2011-10-26 14:47:25 -0700278 2 + 8 + /* peering IE */
279 sdata->u.mesh.ie_len);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100280 if (!skb)
281 return -1;
Thomas Pedersene7570df2012-08-03 12:21:34 -0700282 info = IEEE80211_SKB_CB(skb);
Javier Cardona65e8b0c2012-01-17 18:17:46 -0800283 skb_reserve(skb, local->tx_headroom);
Thomas Pedersen3b69a9c2011-10-26 14:47:25 -0700284 mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len);
285 memset(mgmt, 0, hdr_len);
Harvey Harrisone7827a72008-07-15 18:44:13 -0700286 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
287 IEEE80211_STYPE_ACTION);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100288 memcpy(mgmt->da, da, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +0100289 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Javier Cardona915b5c52011-05-03 16:57:10 -0700290 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
Thomas Pedersen8db09852011-08-12 20:01:00 -0700291 mgmt->u.action.category = WLAN_CATEGORY_SELF_PROTECTED;
292 mgmt->u.action.u.self_prot.action_code = action;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100293
Thomas Pedersen8db09852011-08-12 20:01:00 -0700294 if (action != WLAN_SP_MESH_PEERING_CLOSE) {
Johannes Berg55de9082012-07-26 17:24:39 +0200295 enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
296
Thomas Pedersen8db09852011-08-12 20:01:00 -0700297 /* capability info */
298 pos = skb_put(skb, 2);
299 memset(pos, 0, 2);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700300 if (action == WLAN_SP_MESH_PEERING_CONFIRM) {
Thomas Pedersen8db09852011-08-12 20:01:00 -0700301 /* AID */
302 pos = skb_put(skb, 2);
Rui Paulo77fa76b2009-11-09 23:46:52 +0000303 memcpy(pos + 2, &plid, 2);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100304 }
Johannes Berg55de9082012-07-26 17:24:39 +0200305 if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
306 ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
Johannes Bergbf7cd942013-02-15 14:40:31 +0100307 mesh_add_rsn_ie(sdata, skb) ||
308 mesh_add_meshid_ie(sdata, skb) ||
309 mesh_add_meshconf_ie(sdata, skb))
Thomas Pedersenf609a432012-08-03 12:21:35 -0700310 goto free;
Thomas Pedersen8db09852011-08-12 20:01:00 -0700311 } else { /* WLAN_SP_MESH_PEERING_CLOSE */
Thomas Pedersene7570df2012-08-03 12:21:34 -0700312 info->flags |= IEEE80211_TX_CTL_NO_ACK;
Johannes Bergbf7cd942013-02-15 14:40:31 +0100313 if (mesh_add_meshid_ie(sdata, skb))
Thomas Pedersenf609a432012-08-03 12:21:35 -0700314 goto free;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100315 }
316
Thomas Pedersen8db09852011-08-12 20:01:00 -0700317 /* Add Mesh Peering Management element */
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100318 switch (action) {
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700319 case WLAN_SP_MESH_PEERING_OPEN:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100320 break;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700321 case WLAN_SP_MESH_PEERING_CONFIRM:
Thomas Pedersen8db09852011-08-12 20:01:00 -0700322 ie_len += 2;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100323 include_plid = true;
324 break;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700325 case WLAN_SP_MESH_PEERING_CLOSE:
Thomas Pedersen8db09852011-08-12 20:01:00 -0700326 if (plid) {
327 ie_len += 2;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100328 include_plid = true;
329 }
Thomas Pedersen8db09852011-08-12 20:01:00 -0700330 ie_len += 2; /* reason code */
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100331 break;
Thomas Pedersen8db09852011-08-12 20:01:00 -0700332 default:
Thomas Pedersenf609a432012-08-03 12:21:35 -0700333 err = -EINVAL;
334 goto free;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100335 }
336
Thomas Pedersen8db09852011-08-12 20:01:00 -0700337 if (WARN_ON(skb_tailroom(skb) < 2 + ie_len))
Thomas Pedersenf609a432012-08-03 12:21:35 -0700338 goto free;
Thomas Pedersen8db09852011-08-12 20:01:00 -0700339
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100340 pos = skb_put(skb, 2 + ie_len);
Thomas Pedersen8db09852011-08-12 20:01:00 -0700341 *pos++ = WLAN_EID_PEER_MGMT;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100342 *pos++ = ie_len;
Thomas Pedersen8db09852011-08-12 20:01:00 -0700343 memcpy(pos, &peering_proto, 2);
344 pos += 2;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100345 memcpy(pos, &llid, 2);
Thomas Pedersen8db09852011-08-12 20:01:00 -0700346 pos += 2;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100347 if (include_plid) {
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100348 memcpy(pos, &plid, 2);
Thomas Pedersen8db09852011-08-12 20:01:00 -0700349 pos += 2;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100350 }
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700351 if (action == WLAN_SP_MESH_PEERING_CLOSE) {
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100352 memcpy(pos, &reason, 2);
Thomas Pedersen8db09852011-08-12 20:01:00 -0700353 pos += 2;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100354 }
Thomas Pedersen176f3602011-10-26 14:47:27 -0700355
356 if (action != WLAN_SP_MESH_PEERING_CLOSE) {
Johannes Bergbf7cd942013-02-15 14:40:31 +0100357 if (mesh_add_ht_cap_ie(sdata, skb) ||
358 mesh_add_ht_oper_ie(sdata, skb))
Thomas Pedersenf609a432012-08-03 12:21:35 -0700359 goto free;
Thomas Pedersen176f3602011-10-26 14:47:27 -0700360 }
361
Johannes Bergbf7cd942013-02-15 14:40:31 +0100362 if (mesh_add_vendor_ies(sdata, skb))
Thomas Pedersenf609a432012-08-03 12:21:35 -0700363 goto free;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100364
Johannes Berg62ae67b2009-11-18 18:42:05 +0100365 ieee80211_tx_skb(sdata, skb);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100366 return 0;
Thomas Pedersenf609a432012-08-03 12:21:35 -0700367free:
368 kfree_skb(skb);
369 return err;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100370}
371
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800372static void mesh_sta_info_init(struct ieee80211_sub_if_data *sdata,
373 struct sta_info *sta,
374 struct ieee802_11_elems *elems, bool insert)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100375{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200376 struct ieee80211_local *local = sdata->local;
Johannes Berg55de9082012-07-26 17:24:39 +0200377 enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700378 struct ieee80211_supported_band *sband;
Thomas Pedersenf68d7762013-01-23 12:18:13 -0800379 u32 rates, basic_rates = 0, changed = 0;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100380
Thomas Pedersenf743ff42012-04-18 19:23:43 -0700381 sband = local->hw.wiphy->bands[band];
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200382 rates = ieee80211_sta_get_rates(sdata, elems, band, &basic_rates);
Johannes Bergd0709a62008-02-25 16:27:46 +0100383
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700384 spin_lock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100385 sta->last_rx = jiffies;
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800386
387 /* rates and capabilities don't change during peering */
388 if (sta->plink_state == NL80211_PLINK_ESTAB)
389 goto out;
Chun-Yeow Yeohbae35d92012-07-24 11:52:35 +0800390
Thomas Pedersenf68d7762013-01-23 12:18:13 -0800391 if (sta->sta.supp_rates[band] != rates)
392 changed |= IEEE80211_RC_SUPP_RATES_CHANGED;
Thomas Pedersenf743ff42012-04-18 19:23:43 -0700393 sta->sta.supp_rates[band] = rates;
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700394
Thomas Pedersen52ac8c42013-02-16 10:41:04 -0800395 if (ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
396 elems->ht_cap_elem, sta))
397 changed |= IEEE80211_RC_BW_CHANGED;
Johannes Berg4bf88532012-11-09 11:39:59 +0100398
Thomas Pedersen52ac8c42013-02-16 10:41:04 -0800399 /* HT peer is operating 20MHz-only */
400 if (elems->ht_operation &&
401 !(elems->ht_operation->ht_param &
402 IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
403 if (sta->sta.bandwidth != IEEE80211_STA_RX_BW_20)
Thomas Pedersenf68d7762013-01-23 12:18:13 -0800404 changed |= IEEE80211_RC_BW_CHANGED;
Thomas Pedersen52ac8c42013-02-16 10:41:04 -0800405 sta->sta.bandwidth = IEEE80211_STA_RX_BW_20;
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700406 }
Thomas Pedersenc7d25822012-04-26 15:01:07 -0700407
Helmut Schaa59cf1d62012-11-27 18:03:13 +0100408 if (insert)
409 rate_control_rate_init(sta);
Thomas Pedersenf68d7762013-01-23 12:18:13 -0800410 else
411 rate_control_rate_update(local, sband, sta, changed);
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800412out:
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700413 spin_unlock_bh(&sta->lock);
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800414}
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700415
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800416static struct sta_info *
417__mesh_sta_info_alloc(struct ieee80211_sub_if_data *sdata, u8 *hw_addr)
418{
419 struct sta_info *sta;
420
421 if (sdata->local->num_sta >= MESH_MAX_PLINKS)
Thomas Pedersene87278e2012-04-26 15:01:06 -0700422 return NULL;
423
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800424 sta = sta_info_alloc(sdata, hw_addr, GFP_KERNEL);
425 if (!sta)
426 return NULL;
427
428 sta->plink_state = NL80211_PLINK_LISTEN;
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800429
430 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
431 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
432 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
433
434 set_sta_flag(sta, WLAN_STA_WME);
435
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700436 return sta;
437}
438
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800439static struct sta_info *
440mesh_sta_info_alloc(struct ieee80211_sub_if_data *sdata, u8 *addr,
441 struct ieee802_11_elems *elems)
442{
443 struct sta_info *sta = NULL;
444
Thomas Pedersena6dad6a2013-03-04 13:06:12 -0800445 /* Userspace handles station allocation */
446 if (sdata->u.mesh.user_mpm ||
447 sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED)
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800448 cfg80211_notify_new_peer_candidate(sdata->dev, addr,
449 elems->ie_start,
450 elems->total_len,
451 GFP_KERNEL);
452 else
453 sta = __mesh_sta_info_alloc(sdata, addr);
454
455 return sta;
456}
457
458/*
459 * mesh_sta_info_get - return mesh sta info entry for @addr.
460 *
461 * @sdata: local meshif
462 * @addr: peer's address
463 * @elems: IEs from beacon or mesh peering frame.
464 *
465 * Return existing or newly allocated sta_info under RCU read lock.
466 * (re)initialize with given IEs.
467 */
468static struct sta_info *
469mesh_sta_info_get(struct ieee80211_sub_if_data *sdata,
470 u8 *addr, struct ieee802_11_elems *elems) __acquires(RCU)
471{
472 struct sta_info *sta = NULL;
473
474 rcu_read_lock();
475 sta = sta_info_get(sdata, addr);
476 if (sta) {
477 mesh_sta_info_init(sdata, sta, elems, false);
478 } else {
479 rcu_read_unlock();
480 /* can't run atomic */
481 sta = mesh_sta_info_alloc(sdata, addr, elems);
482 if (!sta) {
483 rcu_read_lock();
484 return NULL;
485 }
486
Thomas Pedersen3b4797b2013-01-26 17:00:02 -0800487 mesh_sta_info_init(sdata, sta, elems, true);
488
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800489 if (sta_info_insert_rcu(sta))
490 return NULL;
491 }
492
493 return sta;
494}
495
496/*
497 * mesh_neighbour_update - update or initialize new mesh neighbor.
498 *
499 * @sdata: local meshif
500 * @addr: peer's address
501 * @elems: IEs from beacon or mesh peering frame
502 *
503 * Initiates peering if appropriate.
504 */
Thomas Pedersenf743ff42012-04-18 19:23:43 -0700505void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
506 u8 *hw_addr,
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700507 struct ieee802_11_elems *elems)
508{
509 struct sta_info *sta;
Thomas Pedersen39886b62013-02-13 12:14:19 -0800510 u32 changed = 0;
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700511
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800512 sta = mesh_sta_info_get(sdata, hw_addr, elems);
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700513 if (!sta)
514 goto out;
515
Javier Cardona1570ca52011-04-07 15:08:35 -0700516 if (mesh_peer_accepts_plinks(elems) &&
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700517 sta->plink_state == NL80211_PLINK_LISTEN &&
518 sdata->u.mesh.accepting_plinks &&
519 sdata->u.mesh.mshcfg.auto_open_plinks &&
520 rssi_threshold_check(sta, sdata))
Thomas Pedersen39886b62013-02-13 12:14:19 -0800521 changed = mesh_plink_open(sta);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100522
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100523 ieee80211_mps_frame_release(sta, elems);
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700524out:
Johannes Bergd0709a62008-02-25 16:27:46 +0100525 rcu_read_unlock();
Thomas Pedersen2b5e1962013-02-14 11:20:13 -0800526 ieee80211_mbss_info_change_notify(sdata, changed);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100527}
528
529static void mesh_plink_timer(unsigned long data)
530{
531 struct sta_info *sta;
532 __le16 llid, plid, reason;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100533 struct ieee80211_sub_if_data *sdata;
Marco Porsch453e66f22012-11-21 18:40:32 -0800534 struct mesh_config *mshcfg;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100535
Johannes Bergd0709a62008-02-25 16:27:46 +0100536 /*
537 * This STA is valid because sta_info_destroy() will
538 * del_timer_sync() this timer after having made sure
539 * it cannot be readded (by deleting the plink.)
540 */
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100541 sta = (struct sta_info *) data;
542
Stanislaw Gruszka690205f2013-02-28 10:55:29 +0100543 if (sta->sdata->local->quiescing)
Johannes Berg5bb644a2009-05-17 11:40:42 +0200544 return;
Johannes Berg5bb644a2009-05-17 11:40:42 +0200545
Johannes Berg07346f812008-05-03 01:02:02 +0200546 spin_lock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100547 if (sta->ignore_plink_timer) {
548 sta->ignore_plink_timer = false;
Johannes Berg07346f812008-05-03 01:02:02 +0200549 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100550 return;
551 }
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200552 mpl_dbg(sta->sdata,
Thomas Pedersen3088f7d2013-04-08 11:06:16 -0700553 "Mesh plink timer for %pM fired on state %s\n",
554 sta->sta.addr, mplstates[sta->plink_state]);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100555 reason = 0;
556 llid = sta->llid;
557 plid = sta->plid;
Johannes Bergd0709a62008-02-25 16:27:46 +0100558 sdata = sta->sdata;
Marco Porsch453e66f22012-11-21 18:40:32 -0800559 mshcfg = &sdata->u.mesh.mshcfg;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100560
561 switch (sta->plink_state) {
Javier Cardona57cf8042011-05-13 10:45:43 -0700562 case NL80211_PLINK_OPN_RCVD:
563 case NL80211_PLINK_OPN_SNT:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100564 /* retry timer */
Marco Porsch453e66f22012-11-21 18:40:32 -0800565 if (sta->plink_retries < mshcfg->dot11MeshMaxRetries) {
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100566 u32 rand;
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200567 mpl_dbg(sta->sdata,
568 "Mesh plink for %pM (retry, timeout): %d %d\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -0700569 sta->sta.addr, sta->plink_retries,
570 sta->plink_timeout);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100571 get_random_bytes(&rand, sizeof(u32));
572 sta->plink_timeout = sta->plink_timeout +
573 rand % sta->plink_timeout;
574 ++sta->plink_retries;
Johannes Bergd0709a62008-02-25 16:27:46 +0100575 mod_plink_timer(sta, sta->plink_timeout);
Johannes Berg07346f812008-05-03 01:02:02 +0200576 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700577 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN,
578 sta->sta.addr, llid, 0, 0);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100579 break;
580 }
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700581 reason = cpu_to_le16(WLAN_REASON_MESH_MAX_RETRIES);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100582 /* fall through on else */
Javier Cardona57cf8042011-05-13 10:45:43 -0700583 case NL80211_PLINK_CNF_RCVD:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100584 /* confirm timer */
585 if (!reason)
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700586 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIRM_TIMEOUT);
Javier Cardona57cf8042011-05-13 10:45:43 -0700587 sta->plink_state = NL80211_PLINK_HOLDING;
Marco Porsch453e66f22012-11-21 18:40:32 -0800588 mod_plink_timer(sta, mshcfg->dot11MeshHoldingTimeout);
Johannes Berg07346f812008-05-03 01:02:02 +0200589 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700590 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
591 sta->sta.addr, llid, plid, reason);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100592 break;
Javier Cardona57cf8042011-05-13 10:45:43 -0700593 case NL80211_PLINK_HOLDING:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100594 /* holding timer */
Johannes Bergd0709a62008-02-25 16:27:46 +0100595 del_timer(&sta->plink_timer);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100596 mesh_plink_fsm_restart(sta);
Johannes Berg07346f812008-05-03 01:02:02 +0200597 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100598 break;
599 default:
Johannes Berg07346f812008-05-03 01:02:02 +0200600 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100601 break;
602 }
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100603}
604
605static inline void mesh_plink_timer_set(struct sta_info *sta, int timeout)
606{
607 sta->plink_timer.expires = jiffies + (HZ * timeout / 1000);
608 sta->plink_timer.data = (unsigned long) sta;
609 sta->plink_timer.function = mesh_plink_timer;
610 sta->plink_timeout = timeout;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100611 add_timer(&sta->plink_timer);
612}
613
Thomas Pedersen39886b62013-02-13 12:14:19 -0800614u32 mesh_plink_open(struct sta_info *sta)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100615{
616 __le16 llid;
Johannes Bergd0709a62008-02-25 16:27:46 +0100617 struct ieee80211_sub_if_data *sdata = sta->sdata;
Thomas Pedersen39886b62013-02-13 12:14:19 -0800618 u32 changed;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100619
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200620 if (!test_sta_flag(sta, WLAN_STA_AUTH))
Thomas Pedersen39886b62013-02-13 12:14:19 -0800621 return 0;
Javier Cardona53e80512011-04-07 15:08:32 -0700622
Johannes Berg07346f812008-05-03 01:02:02 +0200623 spin_lock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100624 get_random_bytes(&llid, 2);
625 sta->llid = llid;
Chun-Yeow Yeoh9385d042012-09-14 14:18:31 +0800626 if (sta->plink_state != NL80211_PLINK_LISTEN &&
627 sta->plink_state != NL80211_PLINK_BLOCKED) {
Johannes Berg07346f812008-05-03 01:02:02 +0200628 spin_unlock_bh(&sta->lock);
Thomas Pedersen39886b62013-02-13 12:14:19 -0800629 return 0;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100630 }
Javier Cardona57cf8042011-05-13 10:45:43 -0700631 sta->plink_state = NL80211_PLINK_OPN_SNT;
Marco Porsch453e66f22012-11-21 18:40:32 -0800632 mesh_plink_timer_set(sta, sdata->u.mesh.mshcfg.dot11MeshRetryTimeout);
Johannes Berg07346f812008-05-03 01:02:02 +0200633 spin_unlock_bh(&sta->lock);
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200634 mpl_dbg(sdata,
635 "Mesh plink: starting establishment with %pM\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -0700636 sta->sta.addr);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100637
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100638 /* set the non-peer mode to active during peering */
Thomas Pedersen39886b62013-02-13 12:14:19 -0800639 changed = ieee80211_mps_local_status_update(sdata);
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100640
Thomas Pedersen39886b62013-02-13 12:14:19 -0800641 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN,
642 sta->sta.addr, llid, 0, 0);
643 return changed;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100644}
645
Thomas Pedersen39886b62013-02-13 12:14:19 -0800646u32 mesh_plink_block(struct sta_info *sta)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100647{
Marco Porschdf323812012-08-08 07:58:43 +0200648 u32 changed;
John W. Linvillec9370192010-06-21 17:14:07 -0400649
Johannes Berg07346f812008-05-03 01:02:02 +0200650 spin_lock_bh(&sta->lock);
Marco Porschdf323812012-08-08 07:58:43 +0200651 changed = __mesh_plink_deactivate(sta);
Javier Cardona57cf8042011-05-13 10:45:43 -0700652 sta->plink_state = NL80211_PLINK_BLOCKED;
Johannes Berg07346f812008-05-03 01:02:02 +0200653 spin_unlock_bh(&sta->lock);
John W. Linvillec9370192010-06-21 17:14:07 -0400654
Thomas Pedersen39886b62013-02-13 12:14:19 -0800655 return changed;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100656}
657
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100658
Johannes Bergbf7cd942013-02-15 14:40:31 +0100659void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
660 struct ieee80211_mgmt *mgmt, size_t len,
661 struct ieee80211_rx_status *rx_status)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100662{
Marco Porsch453e66f22012-11-21 18:40:32 -0800663 struct mesh_config *mshcfg = &sdata->u.mesh.mshcfg;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100664 struct ieee802_11_elems elems;
665 struct sta_info *sta;
666 enum plink_event event;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700667 enum ieee80211_self_protected_actioncode ftype;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100668 size_t baselen;
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700669 bool matches_local = true;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100670 u8 ie_len;
671 u8 *baseaddr;
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700672 u32 changed = 0;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100673 __le16 plid, llid, reason;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100674
Johannes Berg9c80d3d2008-09-08 15:41:59 +0200675 /* need action_code, aux */
676 if (len < IEEE80211_MIN_ACTION_SIZE + 3)
677 return;
678
Thomas Pedersena6dad6a2013-03-04 13:06:12 -0800679 if (sdata->u.mesh.user_mpm)
680 /* userspace must register for these */
681 return;
682
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100683 if (is_multicast_ether_addr(mgmt->da)) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200684 mpl_dbg(sdata,
685 "Mesh plink: ignore frame from multicast address\n");
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100686 return;
687 }
688
Thomas Pedersen8db09852011-08-12 20:01:00 -0700689 baseaddr = mgmt->u.action.u.self_prot.variable;
690 baselen = (u8 *) mgmt->u.action.u.self_prot.variable - (u8 *) mgmt;
691 if (mgmt->u.action.u.self_prot.action_code ==
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700692 WLAN_SP_MESH_PEERING_CONFIRM) {
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100693 baseaddr += 4;
David Woo70bdb6b2009-08-12 11:03:44 -0700694 baselen += 4;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100695 }
Johannes Bergb2e506b2013-03-26 14:54:16 +0100696 ieee802_11_parse_elems(baseaddr, len - baselen, true, &elems);
Johannes Bergbf7cd942013-02-15 14:40:31 +0100697
Thomas Pedersen8db09852011-08-12 20:01:00 -0700698 if (!elems.peering) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200699 mpl_dbg(sdata,
700 "Mesh plink: missing necessary peer link ie\n");
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100701 return;
702 }
Johannes Bergbf7cd942013-02-15 14:40:31 +0100703
Javier Cardonab130e5c2011-05-03 16:57:07 -0700704 if (elems.rsn_len &&
Johannes Bergbf7cd942013-02-15 14:40:31 +0100705 sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200706 mpl_dbg(sdata,
707 "Mesh plink: can't establish link with secure peer\n");
Javier Cardona5cff5e02011-04-07 15:08:29 -0700708 return;
709 }
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100710
Thomas Pedersen8db09852011-08-12 20:01:00 -0700711 ftype = mgmt->u.action.u.self_prot.action_code;
712 ie_len = elems.peering_len;
713 if ((ftype == WLAN_SP_MESH_PEERING_OPEN && ie_len != 4) ||
714 (ftype == WLAN_SP_MESH_PEERING_CONFIRM && ie_len != 6) ||
715 (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len != 6
716 && ie_len != 8)) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200717 mpl_dbg(sdata,
718 "Mesh plink: incorrect plink ie length %d %d\n",
719 ftype, ie_len);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100720 return;
721 }
722
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700723 if (ftype != WLAN_SP_MESH_PEERING_CLOSE &&
Johannes Bergbf7cd942013-02-15 14:40:31 +0100724 (!elems.mesh_id || !elems.mesh_config)) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200725 mpl_dbg(sdata, "Mesh plink: missing necessary ie\n");
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100726 return;
727 }
728 /* Note the lines below are correct, the llid in the frame is the plid
729 * from the point of view of this host.
730 */
Thomas Pedersen8db09852011-08-12 20:01:00 -0700731 memcpy(&plid, PLINK_GET_LLID(elems.peering), 2);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700732 if (ftype == WLAN_SP_MESH_PEERING_CONFIRM ||
Thomas Pedersen8db09852011-08-12 20:01:00 -0700733 (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len == 8))
734 memcpy(&llid, PLINK_GET_PLID(elems.peering), 2);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100735
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800736 /* WARNING: Only for sta pointer, is dropped & re-acquired */
Johannes Bergd0709a62008-02-25 16:27:46 +0100737 rcu_read_lock();
738
Johannes Bergabe60632009-11-25 17:46:18 +0100739 sta = sta_info_get(sdata, mgmt->sa);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700740 if (!sta && ftype != WLAN_SP_MESH_PEERING_OPEN) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200741 mpl_dbg(sdata, "Mesh plink: cls or cnf from unknown peer\n");
Johannes Bergd0709a62008-02-25 16:27:46 +0100742 rcu_read_unlock();
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100743 return;
744 }
745
Ashok Nagarajan55335132012-02-28 17:04:08 -0800746 if (ftype == WLAN_SP_MESH_PEERING_OPEN &&
Ashok Nagarajan3d4f9692012-03-06 12:48:30 -0800747 !rssi_threshold_check(sta, sdata)) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200748 mpl_dbg(sdata, "Mesh plink: %pM does not meet rssi threshold\n",
Ashok Nagarajan3d4f9692012-03-06 12:48:30 -0800749 mgmt->sa);
Ashok Nagarajan55335132012-02-28 17:04:08 -0800750 rcu_read_unlock();
751 return;
752 }
753
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200754 if (sta && !test_sta_flag(sta, WLAN_STA_AUTH)) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200755 mpl_dbg(sdata, "Mesh plink: Action frame from non-authed peer\n");
Javier Cardona53e80512011-04-07 15:08:32 -0700756 rcu_read_unlock();
757 return;
758 }
759
Javier Cardona57cf8042011-05-13 10:45:43 -0700760 if (sta && sta->plink_state == NL80211_PLINK_BLOCKED) {
Johannes Bergd0709a62008-02-25 16:27:46 +0100761 rcu_read_unlock();
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100762 return;
763 }
764
765 /* Now we will figure out the appropriate event... */
766 event = PLINK_UNDEFINED;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700767 if (ftype != WLAN_SP_MESH_PEERING_CLOSE &&
Thomas Pedersenf743ff42012-04-18 19:23:43 -0700768 !mesh_matches_local(sdata, &elems)) {
Christian Lamparterd12c7452010-10-08 22:27:07 +0200769 matches_local = false;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100770 switch (ftype) {
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700771 case WLAN_SP_MESH_PEERING_OPEN:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100772 event = OPN_RJCT;
773 break;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700774 case WLAN_SP_MESH_PEERING_CONFIRM:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100775 event = CNF_RJCT;
776 break;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700777 default:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100778 break;
779 }
Christian Lamparterd12c7452010-10-08 22:27:07 +0200780 }
781
782 if (!sta && !matches_local) {
783 rcu_read_unlock();
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700784 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
Christian Lamparterd12c7452010-10-08 22:27:07 +0200785 llid = 0;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700786 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
787 mgmt->sa, llid, plid, reason);
Christian Lamparterd12c7452010-10-08 22:27:07 +0200788 return;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100789 } else if (!sta) {
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700790 /* ftype == WLAN_SP_MESH_PEERING_OPEN */
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100791 if (!mesh_plink_free_count(sdata)) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200792 mpl_dbg(sdata, "Mesh plink error: no more free plinks\n");
Johannes Berg73651ee2008-02-25 16:27:47 +0100793 rcu_read_unlock();
794 return;
795 }
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100796 event = OPN_ACPT;
Christian Lamparterd12c7452010-10-08 22:27:07 +0200797 } else if (matches_local) {
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100798 switch (ftype) {
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700799 case WLAN_SP_MESH_PEERING_OPEN:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100800 if (!mesh_plink_free_count(sdata) ||
Johannes Bergd0709a62008-02-25 16:27:46 +0100801 (sta->plid && sta->plid != plid))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100802 event = OPN_IGNR;
803 else
804 event = OPN_ACPT;
805 break;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700806 case WLAN_SP_MESH_PEERING_CONFIRM:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100807 if (!mesh_plink_free_count(sdata) ||
Johannes Bergd0709a62008-02-25 16:27:46 +0100808 (sta->llid != llid || sta->plid != plid))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100809 event = CNF_IGNR;
810 else
811 event = CNF_ACPT;
812 break;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700813 case WLAN_SP_MESH_PEERING_CLOSE:
Javier Cardona57cf8042011-05-13 10:45:43 -0700814 if (sta->plink_state == NL80211_PLINK_ESTAB)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100815 /* Do not check for llid or plid. This does not
816 * follow the standard but since multiple plinks
817 * per sta are not supported, it is necessary in
818 * order to avoid a livelock when MP A sees an
819 * establish peer link to MP B but MP B does not
820 * see it. This can be caused by a timeout in
821 * B's peer link establishment or B beign
822 * restarted.
823 */
824 event = CLS_ACPT;
825 else if (sta->plid != plid)
826 event = CLS_IGNR;
827 else if (ie_len == 7 && sta->llid != llid)
828 event = CLS_IGNR;
829 else
830 event = CLS_ACPT;
831 break;
832 default:
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200833 mpl_dbg(sdata, "Mesh plink: unknown frame subtype\n");
Johannes Bergd0709a62008-02-25 16:27:46 +0100834 rcu_read_unlock();
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100835 return;
836 }
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700837 }
838
839 if (event == OPN_ACPT) {
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800840 rcu_read_unlock();
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700841 /* allocate sta entry if necessary and update info */
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800842 sta = mesh_sta_info_get(sdata, mgmt->sa, &elems);
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700843 if (!sta) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200844 mpl_dbg(sdata, "Mesh plink: failed to init peer!\n");
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700845 rcu_read_unlock();
846 return;
847 }
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100848 }
849
Thomas Pedersen95e48ad2013-02-16 10:41:05 -0800850 mpl_dbg(sdata, "peer %pM in state %s got event %s\n", mgmt->sa,
851 mplstates[sta->plink_state], mplevents[event]);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100852 reason = 0;
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700853 spin_lock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100854 switch (sta->plink_state) {
855 /* spin_unlock as soon as state is updated at each case */
Javier Cardona57cf8042011-05-13 10:45:43 -0700856 case NL80211_PLINK_LISTEN:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100857 switch (event) {
858 case CLS_ACPT:
859 mesh_plink_fsm_restart(sta);
Johannes Berg07346f812008-05-03 01:02:02 +0200860 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100861 break;
862 case OPN_ACPT:
Javier Cardona57cf8042011-05-13 10:45:43 -0700863 sta->plink_state = NL80211_PLINK_OPN_RCVD;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100864 sta->plid = plid;
865 get_random_bytes(&llid, 2);
866 sta->llid = llid;
Marco Porsch453e66f22012-11-21 18:40:32 -0800867 mesh_plink_timer_set(sta,
868 mshcfg->dot11MeshRetryTimeout);
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100869
870 /* set the non-peer mode to active during peering */
Thomas Pedersen39886b62013-02-13 12:14:19 -0800871 changed |= ieee80211_mps_local_status_update(sdata);
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100872
Johannes Berg07346f812008-05-03 01:02:02 +0200873 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700874 mesh_plink_frame_tx(sdata,
875 WLAN_SP_MESH_PEERING_OPEN,
876 sta->sta.addr, llid, 0, 0);
877 mesh_plink_frame_tx(sdata,
878 WLAN_SP_MESH_PEERING_CONFIRM,
879 sta->sta.addr, llid, plid, 0);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100880 break;
881 default:
Johannes Berg07346f812008-05-03 01:02:02 +0200882 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100883 break;
884 }
885 break;
886
Javier Cardona57cf8042011-05-13 10:45:43 -0700887 case NL80211_PLINK_OPN_SNT:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100888 switch (event) {
889 case OPN_RJCT:
890 case CNF_RJCT:
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700891 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100892 case CLS_ACPT:
893 if (!reason)
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700894 reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100895 sta->reason = reason;
Javier Cardona57cf8042011-05-13 10:45:43 -0700896 sta->plink_state = NL80211_PLINK_HOLDING;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100897 if (!mod_plink_timer(sta,
Marco Porsch453e66f22012-11-21 18:40:32 -0800898 mshcfg->dot11MeshHoldingTimeout))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100899 sta->ignore_plink_timer = true;
900
901 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +0200902 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700903 mesh_plink_frame_tx(sdata,
904 WLAN_SP_MESH_PEERING_CLOSE,
905 sta->sta.addr, llid, plid, reason);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100906 break;
907 case OPN_ACPT:
908 /* retry timer is left untouched */
Javier Cardona57cf8042011-05-13 10:45:43 -0700909 sta->plink_state = NL80211_PLINK_OPN_RCVD;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100910 sta->plid = plid;
911 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +0200912 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700913 mesh_plink_frame_tx(sdata,
914 WLAN_SP_MESH_PEERING_CONFIRM,
915 sta->sta.addr, llid, plid, 0);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100916 break;
917 case CNF_ACPT:
Javier Cardona57cf8042011-05-13 10:45:43 -0700918 sta->plink_state = NL80211_PLINK_CNF_RCVD;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100919 if (!mod_plink_timer(sta,
Marco Porsch453e66f22012-11-21 18:40:32 -0800920 mshcfg->dot11MeshConfirmTimeout))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100921 sta->ignore_plink_timer = true;
922
Johannes Berg07346f812008-05-03 01:02:02 +0200923 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100924 break;
925 default:
Johannes Berg07346f812008-05-03 01:02:02 +0200926 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100927 break;
928 }
929 break;
930
Javier Cardona57cf8042011-05-13 10:45:43 -0700931 case NL80211_PLINK_OPN_RCVD:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100932 switch (event) {
933 case OPN_RJCT:
934 case CNF_RJCT:
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700935 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100936 case CLS_ACPT:
937 if (!reason)
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700938 reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100939 sta->reason = reason;
Javier Cardona57cf8042011-05-13 10:45:43 -0700940 sta->plink_state = NL80211_PLINK_HOLDING;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100941 if (!mod_plink_timer(sta,
Marco Porsch453e66f22012-11-21 18:40:32 -0800942 mshcfg->dot11MeshHoldingTimeout))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100943 sta->ignore_plink_timer = true;
944
945 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +0200946 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700947 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
948 sta->sta.addr, llid, plid, reason);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100949 break;
950 case OPN_ACPT:
951 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +0200952 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700953 mesh_plink_frame_tx(sdata,
954 WLAN_SP_MESH_PEERING_CONFIRM,
955 sta->sta.addr, llid, plid, 0);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100956 break;
957 case CNF_ACPT:
Johannes Bergd0709a62008-02-25 16:27:46 +0100958 del_timer(&sta->plink_timer);
Javier Cardona57cf8042011-05-13 10:45:43 -0700959 sta->plink_state = NL80211_PLINK_ESTAB;
Johannes Berg07346f812008-05-03 01:02:02 +0200960 spin_unlock_bh(&sta->lock);
Marco Porschdf323812012-08-08 07:58:43 +0200961 changed |= mesh_plink_inc_estab_count(sdata);
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700962 changed |= mesh_set_ht_prot_mode(sdata);
Thomas Pedersen3b144652013-01-26 16:39:55 -0800963 changed |= mesh_set_short_slot_time(sdata);
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200964 mpl_dbg(sdata, "Mesh plink with %pM ESTABLISHED\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -0700965 sta->sta.addr);
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100966 ieee80211_mps_sta_status_update(sta);
Thomas Pedersen39886b62013-02-13 12:14:19 -0800967 changed |= ieee80211_mps_set_sta_local_pm(sta,
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100968 mshcfg->power_mode);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100969 break;
970 default:
Johannes Berg07346f812008-05-03 01:02:02 +0200971 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100972 break;
973 }
974 break;
975
Javier Cardona57cf8042011-05-13 10:45:43 -0700976 case NL80211_PLINK_CNF_RCVD:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100977 switch (event) {
978 case OPN_RJCT:
979 case CNF_RJCT:
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700980 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100981 case CLS_ACPT:
982 if (!reason)
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700983 reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100984 sta->reason = reason;
Javier Cardona57cf8042011-05-13 10:45:43 -0700985 sta->plink_state = NL80211_PLINK_HOLDING;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100986 if (!mod_plink_timer(sta,
Marco Porsch453e66f22012-11-21 18:40:32 -0800987 mshcfg->dot11MeshHoldingTimeout))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100988 sta->ignore_plink_timer = true;
989
990 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +0200991 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700992 mesh_plink_frame_tx(sdata,
993 WLAN_SP_MESH_PEERING_CLOSE,
994 sta->sta.addr, llid, plid, reason);
Johannes Bergff59dc72008-02-25 10:11:50 +0100995 break;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100996 case OPN_ACPT:
Johannes Bergd0709a62008-02-25 16:27:46 +0100997 del_timer(&sta->plink_timer);
Javier Cardona57cf8042011-05-13 10:45:43 -0700998 sta->plink_state = NL80211_PLINK_ESTAB;
Johannes Berg07346f812008-05-03 01:02:02 +0200999 spin_unlock_bh(&sta->lock);
Marco Porschdf323812012-08-08 07:58:43 +02001000 changed |= mesh_plink_inc_estab_count(sdata);
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -07001001 changed |= mesh_set_ht_prot_mode(sdata);
Thomas Pedersen3b144652013-01-26 16:39:55 -08001002 changed |= mesh_set_short_slot_time(sdata);
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02001003 mpl_dbg(sdata, "Mesh plink with %pM ESTABLISHED\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -07001004 sta->sta.addr);
Thomas Pedersen54ef6562011-08-11 19:35:12 -07001005 mesh_plink_frame_tx(sdata,
1006 WLAN_SP_MESH_PEERING_CONFIRM,
1007 sta->sta.addr, llid, plid, 0);
Marco Porsch3f52b7e2013-01-30 18:14:08 +01001008 ieee80211_mps_sta_status_update(sta);
Thomas Pedersen39886b62013-02-13 12:14:19 -08001009 changed |= ieee80211_mps_set_sta_local_pm(sta,
1010 mshcfg->power_mode);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001011 break;
1012 default:
Johannes Berg07346f812008-05-03 01:02:02 +02001013 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001014 break;
1015 }
1016 break;
1017
Javier Cardona57cf8042011-05-13 10:45:43 -07001018 case NL80211_PLINK_ESTAB:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001019 switch (event) {
1020 case CLS_ACPT:
Thomas Pedersen54ef6562011-08-11 19:35:12 -07001021 reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001022 sta->reason = reason;
Marco Porschdf323812012-08-08 07:58:43 +02001023 changed |= __mesh_plink_deactivate(sta);
Javier Cardona57cf8042011-05-13 10:45:43 -07001024 sta->plink_state = NL80211_PLINK_HOLDING;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001025 llid = sta->llid;
Marco Porsch453e66f22012-11-21 18:40:32 -08001026 mod_plink_timer(sta, mshcfg->dot11MeshHoldingTimeout);
Johannes Berg07346f812008-05-03 01:02:02 +02001027 spin_unlock_bh(&sta->lock);
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -07001028 changed |= mesh_set_ht_prot_mode(sdata);
Thomas Pedersen3b144652013-01-26 16:39:55 -08001029 changed |= mesh_set_short_slot_time(sdata);
Thomas Pedersen54ef6562011-08-11 19:35:12 -07001030 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
1031 sta->sta.addr, llid, plid, reason);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001032 break;
1033 case OPN_ACPT:
1034 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +02001035 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -07001036 mesh_plink_frame_tx(sdata,
1037 WLAN_SP_MESH_PEERING_CONFIRM,
1038 sta->sta.addr, llid, plid, 0);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001039 break;
1040 default:
Johannes Berg07346f812008-05-03 01:02:02 +02001041 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001042 break;
1043 }
1044 break;
Javier Cardona57cf8042011-05-13 10:45:43 -07001045 case NL80211_PLINK_HOLDING:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001046 switch (event) {
1047 case CLS_ACPT:
Johannes Bergd0709a62008-02-25 16:27:46 +01001048 if (del_timer(&sta->plink_timer))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001049 sta->ignore_plink_timer = 1;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001050 mesh_plink_fsm_restart(sta);
Johannes Berg07346f812008-05-03 01:02:02 +02001051 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001052 break;
1053 case OPN_ACPT:
1054 case CNF_ACPT:
1055 case OPN_RJCT:
1056 case CNF_RJCT:
1057 llid = sta->llid;
1058 reason = sta->reason;
Johannes Berg07346f812008-05-03 01:02:02 +02001059 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -07001060 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
1061 sta->sta.addr, llid, plid, reason);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001062 break;
1063 default:
Johannes Berg07346f812008-05-03 01:02:02 +02001064 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001065 }
1066 break;
1067 default:
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -08001068 /* should not get here, PLINK_BLOCKED is dealt with at the
Daniel Mack3ad2f3f2010-02-03 08:01:28 +08001069 * beginning of the function
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001070 */
Johannes Berg07346f812008-05-03 01:02:02 +02001071 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001072 break;
1073 }
Johannes Bergd0709a62008-02-25 16:27:46 +01001074
1075 rcu_read_unlock();
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -07001076
Thomas Pedersenecccd072013-06-10 13:17:21 -07001077 if (changed)
Thomas Pedersen2b5e1962013-02-14 11:20:13 -08001078 ieee80211_mbss_info_change_notify(sdata, changed);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001079}