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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);
Marco Porsch446075d2013-10-15 12:29:24 +0200225 changed |= ieee80211_mps_set_sta_local_pm(sta,
226 NL80211_MESH_POWER_UNKNOWN);
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100227
Marco Porschdf323812012-08-08 07:58:43 +0200228 return changed;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100229}
230
Johannes Berg902acc72008-02-23 15:17:19 +0100231/**
John W. Linvillec9370192010-06-21 17:14:07 -0400232 * mesh_plink_deactivate - deactivate mesh peer link
Johannes Berg902acc72008-02-23 15:17:19 +0100233 *
234 * @sta: mesh peer link to deactivate
235 *
236 * All mesh paths with this peer as next hop will be flushed
237 */
Thomas Pedersen45b50282013-02-06 10:17:21 -0800238u32 mesh_plink_deactivate(struct sta_info *sta)
Johannes Berg902acc72008-02-23 15:17:19 +0100239{
John W. Linvillec9370192010-06-21 17:14:07 -0400240 struct ieee80211_sub_if_data *sdata = sta->sdata;
Marco Porschdf323812012-08-08 07:58:43 +0200241 u32 changed;
John W. Linvillec9370192010-06-21 17:14:07 -0400242
Johannes Berg07346f812008-05-03 01:02:02 +0200243 spin_lock_bh(&sta->lock);
Marco Porschdf323812012-08-08 07:58:43 +0200244 changed = __mesh_plink_deactivate(sta);
Thomas Pedersenba4a14e2011-09-20 13:43:32 -0700245 sta->reason = cpu_to_le16(WLAN_REASON_MESH_PEER_CANCELED);
246 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
247 sta->sta.addr, sta->llid, sta->plid,
248 sta->reason);
Johannes Berg07346f812008-05-03 01:02:02 +0200249 spin_unlock_bh(&sta->lock);
John W. Linvillec9370192010-06-21 17:14:07 -0400250
Thomas Pedersen45b50282013-02-06 10:17:21 -0800251 return changed;
Johannes Berg902acc72008-02-23 15:17:19 +0100252}
253
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200254static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
Johannes Bergbf7cd942013-02-15 14:40:31 +0100255 enum ieee80211_self_protected_actioncode action,
256 u8 *da, __le16 llid, __le16 plid, __le16 reason)
257{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200258 struct ieee80211_local *local = sdata->local;
Thomas Pedersen3b69a9c2011-10-26 14:47:25 -0700259 struct sk_buff *skb;
Thomas Pedersene7570df2012-08-03 12:21:34 -0700260 struct ieee80211_tx_info *info;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100261 struct ieee80211_mgmt *mgmt;
262 bool include_plid = false;
Thomas Pedersen8db09852011-08-12 20:01:00 -0700263 u16 peering_proto = 0;
Thomas Pedersen3b69a9c2011-10-26 14:47:25 -0700264 u8 *pos, ie_len = 4;
265 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.self_prot) +
266 sizeof(mgmt->u.action.u.self_prot);
Thomas Pedersenf609a432012-08-03 12:21:35 -0700267 int err = -ENOMEM;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100268
Javier Cardona65e8b0c2012-01-17 18:17:46 -0800269 skb = dev_alloc_skb(local->tx_headroom +
Thomas Pedersen3b69a9c2011-10-26 14:47:25 -0700270 hdr_len +
271 2 + /* capability info */
272 2 + /* AID */
273 2 + 8 + /* supported rates */
274 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
275 2 + sdata->u.mesh.mesh_id_len +
276 2 + sizeof(struct ieee80211_meshconf_ie) +
Thomas Pedersen176f3602011-10-26 14:47:27 -0700277 2 + sizeof(struct ieee80211_ht_cap) +
Johannes Berg074d46d2012-03-15 19:45:16 +0100278 2 + sizeof(struct ieee80211_ht_operation) +
Thomas Pedersen3b69a9c2011-10-26 14:47:25 -0700279 2 + 8 + /* peering IE */
280 sdata->u.mesh.ie_len);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100281 if (!skb)
282 return -1;
Thomas Pedersene7570df2012-08-03 12:21:34 -0700283 info = IEEE80211_SKB_CB(skb);
Javier Cardona65e8b0c2012-01-17 18:17:46 -0800284 skb_reserve(skb, local->tx_headroom);
Thomas Pedersen3b69a9c2011-10-26 14:47:25 -0700285 mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len);
286 memset(mgmt, 0, hdr_len);
Harvey Harrisone7827a72008-07-15 18:44:13 -0700287 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
288 IEEE80211_STYPE_ACTION);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100289 memcpy(mgmt->da, da, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +0100290 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Javier Cardona915b5c52011-05-03 16:57:10 -0700291 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
Thomas Pedersen8db09852011-08-12 20:01:00 -0700292 mgmt->u.action.category = WLAN_CATEGORY_SELF_PROTECTED;
293 mgmt->u.action.u.self_prot.action_code = action;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100294
Thomas Pedersen8db09852011-08-12 20:01:00 -0700295 if (action != WLAN_SP_MESH_PEERING_CLOSE) {
Johannes Berg55de9082012-07-26 17:24:39 +0200296 enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
297
Thomas Pedersen8db09852011-08-12 20:01:00 -0700298 /* capability info */
299 pos = skb_put(skb, 2);
300 memset(pos, 0, 2);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700301 if (action == WLAN_SP_MESH_PEERING_CONFIRM) {
Thomas Pedersen8db09852011-08-12 20:01:00 -0700302 /* AID */
303 pos = skb_put(skb, 2);
Rui Paulo77fa76b2009-11-09 23:46:52 +0000304 memcpy(pos + 2, &plid, 2);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100305 }
Johannes Berg55de9082012-07-26 17:24:39 +0200306 if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
307 ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
Johannes Bergbf7cd942013-02-15 14:40:31 +0100308 mesh_add_rsn_ie(sdata, skb) ||
309 mesh_add_meshid_ie(sdata, skb) ||
310 mesh_add_meshconf_ie(sdata, skb))
Thomas Pedersenf609a432012-08-03 12:21:35 -0700311 goto free;
Thomas Pedersen8db09852011-08-12 20:01:00 -0700312 } else { /* WLAN_SP_MESH_PEERING_CLOSE */
Thomas Pedersene7570df2012-08-03 12:21:34 -0700313 info->flags |= IEEE80211_TX_CTL_NO_ACK;
Johannes Bergbf7cd942013-02-15 14:40:31 +0100314 if (mesh_add_meshid_ie(sdata, skb))
Thomas Pedersenf609a432012-08-03 12:21:35 -0700315 goto free;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100316 }
317
Thomas Pedersen8db09852011-08-12 20:01:00 -0700318 /* Add Mesh Peering Management element */
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100319 switch (action) {
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700320 case WLAN_SP_MESH_PEERING_OPEN:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100321 break;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700322 case WLAN_SP_MESH_PEERING_CONFIRM:
Thomas Pedersen8db09852011-08-12 20:01:00 -0700323 ie_len += 2;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100324 include_plid = true;
325 break;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700326 case WLAN_SP_MESH_PEERING_CLOSE:
Thomas Pedersen8db09852011-08-12 20:01:00 -0700327 if (plid) {
328 ie_len += 2;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100329 include_plid = true;
330 }
Thomas Pedersen8db09852011-08-12 20:01:00 -0700331 ie_len += 2; /* reason code */
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100332 break;
Thomas Pedersen8db09852011-08-12 20:01:00 -0700333 default:
Thomas Pedersenf609a432012-08-03 12:21:35 -0700334 err = -EINVAL;
335 goto free;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100336 }
337
Thomas Pedersen8db09852011-08-12 20:01:00 -0700338 if (WARN_ON(skb_tailroom(skb) < 2 + ie_len))
Thomas Pedersenf609a432012-08-03 12:21:35 -0700339 goto free;
Thomas Pedersen8db09852011-08-12 20:01:00 -0700340
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100341 pos = skb_put(skb, 2 + ie_len);
Thomas Pedersen8db09852011-08-12 20:01:00 -0700342 *pos++ = WLAN_EID_PEER_MGMT;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100343 *pos++ = ie_len;
Thomas Pedersen8db09852011-08-12 20:01:00 -0700344 memcpy(pos, &peering_proto, 2);
345 pos += 2;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100346 memcpy(pos, &llid, 2);
Thomas Pedersen8db09852011-08-12 20:01:00 -0700347 pos += 2;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100348 if (include_plid) {
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100349 memcpy(pos, &plid, 2);
Thomas Pedersen8db09852011-08-12 20:01:00 -0700350 pos += 2;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100351 }
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700352 if (action == WLAN_SP_MESH_PEERING_CLOSE) {
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100353 memcpy(pos, &reason, 2);
Thomas Pedersen8db09852011-08-12 20:01:00 -0700354 pos += 2;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100355 }
Thomas Pedersen176f3602011-10-26 14:47:27 -0700356
357 if (action != WLAN_SP_MESH_PEERING_CLOSE) {
Johannes Bergbf7cd942013-02-15 14:40:31 +0100358 if (mesh_add_ht_cap_ie(sdata, skb) ||
359 mesh_add_ht_oper_ie(sdata, skb))
Thomas Pedersenf609a432012-08-03 12:21:35 -0700360 goto free;
Thomas Pedersen176f3602011-10-26 14:47:27 -0700361 }
362
Johannes Bergbf7cd942013-02-15 14:40:31 +0100363 if (mesh_add_vendor_ies(sdata, skb))
Thomas Pedersenf609a432012-08-03 12:21:35 -0700364 goto free;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100365
Johannes Berg62ae67b2009-11-18 18:42:05 +0100366 ieee80211_tx_skb(sdata, skb);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100367 return 0;
Thomas Pedersenf609a432012-08-03 12:21:35 -0700368free:
369 kfree_skb(skb);
370 return err;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100371}
372
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800373static void mesh_sta_info_init(struct ieee80211_sub_if_data *sdata,
374 struct sta_info *sta,
375 struct ieee802_11_elems *elems, bool insert)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100376{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200377 struct ieee80211_local *local = sdata->local;
Johannes Berg55de9082012-07-26 17:24:39 +0200378 enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700379 struct ieee80211_supported_band *sband;
Thomas Pedersenf68d7762013-01-23 12:18:13 -0800380 u32 rates, basic_rates = 0, changed = 0;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100381
Thomas Pedersenf743ff42012-04-18 19:23:43 -0700382 sband = local->hw.wiphy->bands[band];
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200383 rates = ieee80211_sta_get_rates(sdata, elems, band, &basic_rates);
Johannes Bergd0709a62008-02-25 16:27:46 +0100384
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700385 spin_lock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100386 sta->last_rx = jiffies;
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800387
388 /* rates and capabilities don't change during peering */
389 if (sta->plink_state == NL80211_PLINK_ESTAB)
390 goto out;
Chun-Yeow Yeohbae35d92012-07-24 11:52:35 +0800391
Thomas Pedersenf68d7762013-01-23 12:18:13 -0800392 if (sta->sta.supp_rates[band] != rates)
393 changed |= IEEE80211_RC_SUPP_RATES_CHANGED;
Thomas Pedersenf743ff42012-04-18 19:23:43 -0700394 sta->sta.supp_rates[band] = rates;
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700395
Thomas Pedersen52ac8c42013-02-16 10:41:04 -0800396 if (ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
397 elems->ht_cap_elem, sta))
398 changed |= IEEE80211_RC_BW_CHANGED;
Johannes Berg4bf88532012-11-09 11:39:59 +0100399
Thomas Pedersen52ac8c42013-02-16 10:41:04 -0800400 /* HT peer is operating 20MHz-only */
401 if (elems->ht_operation &&
402 !(elems->ht_operation->ht_param &
403 IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
404 if (sta->sta.bandwidth != IEEE80211_STA_RX_BW_20)
Thomas Pedersenf68d7762013-01-23 12:18:13 -0800405 changed |= IEEE80211_RC_BW_CHANGED;
Thomas Pedersen52ac8c42013-02-16 10:41:04 -0800406 sta->sta.bandwidth = IEEE80211_STA_RX_BW_20;
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700407 }
Thomas Pedersenc7d25822012-04-26 15:01:07 -0700408
Helmut Schaa59cf1d62012-11-27 18:03:13 +0100409 if (insert)
410 rate_control_rate_init(sta);
Thomas Pedersenf68d7762013-01-23 12:18:13 -0800411 else
412 rate_control_rate_update(local, sband, sta, changed);
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800413out:
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700414 spin_unlock_bh(&sta->lock);
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800415}
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700416
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800417static struct sta_info *
418__mesh_sta_info_alloc(struct ieee80211_sub_if_data *sdata, u8 *hw_addr)
419{
420 struct sta_info *sta;
421
422 if (sdata->local->num_sta >= MESH_MAX_PLINKS)
Thomas Pedersene87278e2012-04-26 15:01:06 -0700423 return NULL;
424
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800425 sta = sta_info_alloc(sdata, hw_addr, GFP_KERNEL);
426 if (!sta)
427 return NULL;
428
429 sta->plink_state = NL80211_PLINK_LISTEN;
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800430
431 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
432 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
433 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
434
435 set_sta_flag(sta, WLAN_STA_WME);
436
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700437 return sta;
438}
439
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800440static struct sta_info *
441mesh_sta_info_alloc(struct ieee80211_sub_if_data *sdata, u8 *addr,
442 struct ieee802_11_elems *elems)
443{
444 struct sta_info *sta = NULL;
445
Thomas Pedersena6dad6a2013-03-04 13:06:12 -0800446 /* Userspace handles station allocation */
447 if (sdata->u.mesh.user_mpm ||
448 sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED)
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800449 cfg80211_notify_new_peer_candidate(sdata->dev, addr,
450 elems->ie_start,
451 elems->total_len,
452 GFP_KERNEL);
453 else
454 sta = __mesh_sta_info_alloc(sdata, addr);
455
456 return sta;
457}
458
459/*
460 * mesh_sta_info_get - return mesh sta info entry for @addr.
461 *
462 * @sdata: local meshif
463 * @addr: peer's address
464 * @elems: IEs from beacon or mesh peering frame.
465 *
466 * Return existing or newly allocated sta_info under RCU read lock.
467 * (re)initialize with given IEs.
468 */
469static struct sta_info *
470mesh_sta_info_get(struct ieee80211_sub_if_data *sdata,
471 u8 *addr, struct ieee802_11_elems *elems) __acquires(RCU)
472{
473 struct sta_info *sta = NULL;
474
475 rcu_read_lock();
476 sta = sta_info_get(sdata, addr);
477 if (sta) {
478 mesh_sta_info_init(sdata, sta, elems, false);
479 } else {
480 rcu_read_unlock();
481 /* can't run atomic */
482 sta = mesh_sta_info_alloc(sdata, addr, elems);
483 if (!sta) {
484 rcu_read_lock();
485 return NULL;
486 }
487
Thomas Pedersen3b4797b2013-01-26 17:00:02 -0800488 mesh_sta_info_init(sdata, sta, elems, true);
489
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800490 if (sta_info_insert_rcu(sta))
491 return NULL;
492 }
493
494 return sta;
495}
496
497/*
498 * mesh_neighbour_update - update or initialize new mesh neighbor.
499 *
500 * @sdata: local meshif
501 * @addr: peer's address
502 * @elems: IEs from beacon or mesh peering frame
503 *
504 * Initiates peering if appropriate.
505 */
Thomas Pedersenf743ff42012-04-18 19:23:43 -0700506void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
507 u8 *hw_addr,
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700508 struct ieee802_11_elems *elems)
509{
510 struct sta_info *sta;
Thomas Pedersen39886b62013-02-13 12:14:19 -0800511 u32 changed = 0;
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700512
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800513 sta = mesh_sta_info_get(sdata, hw_addr, elems);
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700514 if (!sta)
515 goto out;
516
Javier Cardona1570ca52011-04-07 15:08:35 -0700517 if (mesh_peer_accepts_plinks(elems) &&
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700518 sta->plink_state == NL80211_PLINK_LISTEN &&
519 sdata->u.mesh.accepting_plinks &&
520 sdata->u.mesh.mshcfg.auto_open_plinks &&
521 rssi_threshold_check(sta, sdata))
Thomas Pedersen39886b62013-02-13 12:14:19 -0800522 changed = mesh_plink_open(sta);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100523
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100524 ieee80211_mps_frame_release(sta, elems);
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700525out:
Johannes Bergd0709a62008-02-25 16:27:46 +0100526 rcu_read_unlock();
Thomas Pedersen2b5e1962013-02-14 11:20:13 -0800527 ieee80211_mbss_info_change_notify(sdata, changed);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100528}
529
530static void mesh_plink_timer(unsigned long data)
531{
532 struct sta_info *sta;
533 __le16 llid, plid, reason;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100534 struct ieee80211_sub_if_data *sdata;
Marco Porsch453e66f22012-11-21 18:40:32 -0800535 struct mesh_config *mshcfg;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100536
Johannes Bergd0709a62008-02-25 16:27:46 +0100537 /*
538 * This STA is valid because sta_info_destroy() will
539 * del_timer_sync() this timer after having made sure
540 * it cannot be readded (by deleting the plink.)
541 */
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100542 sta = (struct sta_info *) data;
543
Stanislaw Gruszka690205f2013-02-28 10:55:29 +0100544 if (sta->sdata->local->quiescing)
Johannes Berg5bb644a2009-05-17 11:40:42 +0200545 return;
Johannes Berg5bb644a2009-05-17 11:40:42 +0200546
Johannes Berg07346f812008-05-03 01:02:02 +0200547 spin_lock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100548 if (sta->ignore_plink_timer) {
549 sta->ignore_plink_timer = false;
Johannes Berg07346f812008-05-03 01:02:02 +0200550 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100551 return;
552 }
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200553 mpl_dbg(sta->sdata,
Thomas Pedersen3088f7d2013-04-08 11:06:16 -0700554 "Mesh plink timer for %pM fired on state %s\n",
555 sta->sta.addr, mplstates[sta->plink_state]);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100556 reason = 0;
557 llid = sta->llid;
558 plid = sta->plid;
Johannes Bergd0709a62008-02-25 16:27:46 +0100559 sdata = sta->sdata;
Marco Porsch453e66f22012-11-21 18:40:32 -0800560 mshcfg = &sdata->u.mesh.mshcfg;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100561
562 switch (sta->plink_state) {
Javier Cardona57cf8042011-05-13 10:45:43 -0700563 case NL80211_PLINK_OPN_RCVD:
564 case NL80211_PLINK_OPN_SNT:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100565 /* retry timer */
Marco Porsch453e66f22012-11-21 18:40:32 -0800566 if (sta->plink_retries < mshcfg->dot11MeshMaxRetries) {
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100567 u32 rand;
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200568 mpl_dbg(sta->sdata,
569 "Mesh plink for %pM (retry, timeout): %d %d\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -0700570 sta->sta.addr, sta->plink_retries,
571 sta->plink_timeout);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100572 get_random_bytes(&rand, sizeof(u32));
573 sta->plink_timeout = sta->plink_timeout +
574 rand % sta->plink_timeout;
575 ++sta->plink_retries;
Johannes Bergd0709a62008-02-25 16:27:46 +0100576 mod_plink_timer(sta, sta->plink_timeout);
Johannes Berg07346f812008-05-03 01:02:02 +0200577 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700578 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN,
579 sta->sta.addr, llid, 0, 0);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100580 break;
581 }
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700582 reason = cpu_to_le16(WLAN_REASON_MESH_MAX_RETRIES);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100583 /* fall through on else */
Javier Cardona57cf8042011-05-13 10:45:43 -0700584 case NL80211_PLINK_CNF_RCVD:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100585 /* confirm timer */
586 if (!reason)
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700587 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIRM_TIMEOUT);
Javier Cardona57cf8042011-05-13 10:45:43 -0700588 sta->plink_state = NL80211_PLINK_HOLDING;
Marco Porsch453e66f22012-11-21 18:40:32 -0800589 mod_plink_timer(sta, mshcfg->dot11MeshHoldingTimeout);
Johannes Berg07346f812008-05-03 01:02:02 +0200590 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700591 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
592 sta->sta.addr, llid, plid, reason);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100593 break;
Javier Cardona57cf8042011-05-13 10:45:43 -0700594 case NL80211_PLINK_HOLDING:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100595 /* holding timer */
Johannes Bergd0709a62008-02-25 16:27:46 +0100596 del_timer(&sta->plink_timer);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100597 mesh_plink_fsm_restart(sta);
Johannes Berg07346f812008-05-03 01:02:02 +0200598 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100599 break;
600 default:
Johannes Berg07346f812008-05-03 01:02:02 +0200601 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100602 break;
603 }
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100604}
605
606static inline void mesh_plink_timer_set(struct sta_info *sta, int timeout)
607{
608 sta->plink_timer.expires = jiffies + (HZ * timeout / 1000);
609 sta->plink_timer.data = (unsigned long) sta;
610 sta->plink_timer.function = mesh_plink_timer;
611 sta->plink_timeout = timeout;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100612 add_timer(&sta->plink_timer);
613}
614
Thomas Pedersen39886b62013-02-13 12:14:19 -0800615u32 mesh_plink_open(struct sta_info *sta)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100616{
617 __le16 llid;
Johannes Bergd0709a62008-02-25 16:27:46 +0100618 struct ieee80211_sub_if_data *sdata = sta->sdata;
Thomas Pedersen39886b62013-02-13 12:14:19 -0800619 u32 changed;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100620
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200621 if (!test_sta_flag(sta, WLAN_STA_AUTH))
Thomas Pedersen39886b62013-02-13 12:14:19 -0800622 return 0;
Javier Cardona53e80512011-04-07 15:08:32 -0700623
Johannes Berg07346f812008-05-03 01:02:02 +0200624 spin_lock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100625 get_random_bytes(&llid, 2);
626 sta->llid = llid;
Chun-Yeow Yeoh9385d042012-09-14 14:18:31 +0800627 if (sta->plink_state != NL80211_PLINK_LISTEN &&
628 sta->plink_state != NL80211_PLINK_BLOCKED) {
Johannes Berg07346f812008-05-03 01:02:02 +0200629 spin_unlock_bh(&sta->lock);
Thomas Pedersen39886b62013-02-13 12:14:19 -0800630 return 0;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100631 }
Javier Cardona57cf8042011-05-13 10:45:43 -0700632 sta->plink_state = NL80211_PLINK_OPN_SNT;
Marco Porsch453e66f22012-11-21 18:40:32 -0800633 mesh_plink_timer_set(sta, sdata->u.mesh.mshcfg.dot11MeshRetryTimeout);
Johannes Berg07346f812008-05-03 01:02:02 +0200634 spin_unlock_bh(&sta->lock);
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200635 mpl_dbg(sdata,
636 "Mesh plink: starting establishment with %pM\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -0700637 sta->sta.addr);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100638
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100639 /* set the non-peer mode to active during peering */
Thomas Pedersen39886b62013-02-13 12:14:19 -0800640 changed = ieee80211_mps_local_status_update(sdata);
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100641
Thomas Pedersen39886b62013-02-13 12:14:19 -0800642 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN,
643 sta->sta.addr, llid, 0, 0);
644 return changed;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100645}
646
Thomas Pedersen39886b62013-02-13 12:14:19 -0800647u32 mesh_plink_block(struct sta_info *sta)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100648{
Marco Porschdf323812012-08-08 07:58:43 +0200649 u32 changed;
John W. Linvillec9370192010-06-21 17:14:07 -0400650
Johannes Berg07346f812008-05-03 01:02:02 +0200651 spin_lock_bh(&sta->lock);
Marco Porschdf323812012-08-08 07:58:43 +0200652 changed = __mesh_plink_deactivate(sta);
Javier Cardona57cf8042011-05-13 10:45:43 -0700653 sta->plink_state = NL80211_PLINK_BLOCKED;
Johannes Berg07346f812008-05-03 01:02:02 +0200654 spin_unlock_bh(&sta->lock);
John W. Linvillec9370192010-06-21 17:14:07 -0400655
Thomas Pedersen39886b62013-02-13 12:14:19 -0800656 return changed;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100657}
658
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100659
Johannes Bergbf7cd942013-02-15 14:40:31 +0100660void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
661 struct ieee80211_mgmt *mgmt, size_t len,
662 struct ieee80211_rx_status *rx_status)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100663{
Marco Porsch453e66f22012-11-21 18:40:32 -0800664 struct mesh_config *mshcfg = &sdata->u.mesh.mshcfg;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100665 struct ieee802_11_elems elems;
666 struct sta_info *sta;
667 enum plink_event event;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700668 enum ieee80211_self_protected_actioncode ftype;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100669 size_t baselen;
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700670 bool matches_local = true;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100671 u8 ie_len;
672 u8 *baseaddr;
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700673 u32 changed = 0;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100674 __le16 plid, llid, reason;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100675
Johannes Berg9c80d3d2008-09-08 15:41:59 +0200676 /* need action_code, aux */
677 if (len < IEEE80211_MIN_ACTION_SIZE + 3)
678 return;
679
Thomas Pedersena6dad6a2013-03-04 13:06:12 -0800680 if (sdata->u.mesh.user_mpm)
681 /* userspace must register for these */
682 return;
683
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100684 if (is_multicast_ether_addr(mgmt->da)) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200685 mpl_dbg(sdata,
686 "Mesh plink: ignore frame from multicast address\n");
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100687 return;
688 }
689
Thomas Pedersen8db09852011-08-12 20:01:00 -0700690 baseaddr = mgmt->u.action.u.self_prot.variable;
691 baselen = (u8 *) mgmt->u.action.u.self_prot.variable - (u8 *) mgmt;
692 if (mgmt->u.action.u.self_prot.action_code ==
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700693 WLAN_SP_MESH_PEERING_CONFIRM) {
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100694 baseaddr += 4;
David Woo70bdb6b2009-08-12 11:03:44 -0700695 baselen += 4;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100696 }
Johannes Bergb2e506b2013-03-26 14:54:16 +0100697 ieee802_11_parse_elems(baseaddr, len - baselen, true, &elems);
Johannes Bergbf7cd942013-02-15 14:40:31 +0100698
Thomas Pedersen8db09852011-08-12 20:01:00 -0700699 if (!elems.peering) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200700 mpl_dbg(sdata,
701 "Mesh plink: missing necessary peer link ie\n");
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100702 return;
703 }
Johannes Bergbf7cd942013-02-15 14:40:31 +0100704
Javier Cardonab130e5c2011-05-03 16:57:07 -0700705 if (elems.rsn_len &&
Johannes Bergbf7cd942013-02-15 14:40:31 +0100706 sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200707 mpl_dbg(sdata,
708 "Mesh plink: can't establish link with secure peer\n");
Javier Cardona5cff5e02011-04-07 15:08:29 -0700709 return;
710 }
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100711
Thomas Pedersen8db09852011-08-12 20:01:00 -0700712 ftype = mgmt->u.action.u.self_prot.action_code;
713 ie_len = elems.peering_len;
714 if ((ftype == WLAN_SP_MESH_PEERING_OPEN && ie_len != 4) ||
715 (ftype == WLAN_SP_MESH_PEERING_CONFIRM && ie_len != 6) ||
716 (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len != 6
717 && ie_len != 8)) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200718 mpl_dbg(sdata,
719 "Mesh plink: incorrect plink ie length %d %d\n",
720 ftype, ie_len);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100721 return;
722 }
723
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700724 if (ftype != WLAN_SP_MESH_PEERING_CLOSE &&
Johannes Bergbf7cd942013-02-15 14:40:31 +0100725 (!elems.mesh_id || !elems.mesh_config)) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200726 mpl_dbg(sdata, "Mesh plink: missing necessary ie\n");
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100727 return;
728 }
729 /* Note the lines below are correct, the llid in the frame is the plid
730 * from the point of view of this host.
731 */
Thomas Pedersen8db09852011-08-12 20:01:00 -0700732 memcpy(&plid, PLINK_GET_LLID(elems.peering), 2);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700733 if (ftype == WLAN_SP_MESH_PEERING_CONFIRM ||
Thomas Pedersen8db09852011-08-12 20:01:00 -0700734 (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len == 8))
735 memcpy(&llid, PLINK_GET_PLID(elems.peering), 2);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100736
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800737 /* WARNING: Only for sta pointer, is dropped & re-acquired */
Johannes Bergd0709a62008-02-25 16:27:46 +0100738 rcu_read_lock();
739
Johannes Bergabe60632009-11-25 17:46:18 +0100740 sta = sta_info_get(sdata, mgmt->sa);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700741 if (!sta && ftype != WLAN_SP_MESH_PEERING_OPEN) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200742 mpl_dbg(sdata, "Mesh plink: cls or cnf from unknown peer\n");
Johannes Bergd0709a62008-02-25 16:27:46 +0100743 rcu_read_unlock();
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100744 return;
745 }
746
Ashok Nagarajan55335132012-02-28 17:04:08 -0800747 if (ftype == WLAN_SP_MESH_PEERING_OPEN &&
Ashok Nagarajan3d4f9692012-03-06 12:48:30 -0800748 !rssi_threshold_check(sta, sdata)) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200749 mpl_dbg(sdata, "Mesh plink: %pM does not meet rssi threshold\n",
Ashok Nagarajan3d4f9692012-03-06 12:48:30 -0800750 mgmt->sa);
Ashok Nagarajan55335132012-02-28 17:04:08 -0800751 rcu_read_unlock();
752 return;
753 }
754
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200755 if (sta && !test_sta_flag(sta, WLAN_STA_AUTH)) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200756 mpl_dbg(sdata, "Mesh plink: Action frame from non-authed peer\n");
Javier Cardona53e80512011-04-07 15:08:32 -0700757 rcu_read_unlock();
758 return;
759 }
760
Javier Cardona57cf8042011-05-13 10:45:43 -0700761 if (sta && sta->plink_state == NL80211_PLINK_BLOCKED) {
Johannes Bergd0709a62008-02-25 16:27:46 +0100762 rcu_read_unlock();
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100763 return;
764 }
765
766 /* Now we will figure out the appropriate event... */
767 event = PLINK_UNDEFINED;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700768 if (ftype != WLAN_SP_MESH_PEERING_CLOSE &&
Thomas Pedersenf743ff42012-04-18 19:23:43 -0700769 !mesh_matches_local(sdata, &elems)) {
Christian Lamparterd12c7452010-10-08 22:27:07 +0200770 matches_local = false;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100771 switch (ftype) {
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700772 case WLAN_SP_MESH_PEERING_OPEN:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100773 event = OPN_RJCT;
774 break;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700775 case WLAN_SP_MESH_PEERING_CONFIRM:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100776 event = CNF_RJCT;
777 break;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700778 default:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100779 break;
780 }
Christian Lamparterd12c7452010-10-08 22:27:07 +0200781 }
782
783 if (!sta && !matches_local) {
784 rcu_read_unlock();
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700785 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
Christian Lamparterd12c7452010-10-08 22:27:07 +0200786 llid = 0;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700787 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
788 mgmt->sa, llid, plid, reason);
Christian Lamparterd12c7452010-10-08 22:27:07 +0200789 return;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100790 } else if (!sta) {
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700791 /* ftype == WLAN_SP_MESH_PEERING_OPEN */
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100792 if (!mesh_plink_free_count(sdata)) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200793 mpl_dbg(sdata, "Mesh plink error: no more free plinks\n");
Johannes Berg73651ee2008-02-25 16:27:47 +0100794 rcu_read_unlock();
795 return;
796 }
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100797 event = OPN_ACPT;
Christian Lamparterd12c7452010-10-08 22:27:07 +0200798 } else if (matches_local) {
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100799 switch (ftype) {
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700800 case WLAN_SP_MESH_PEERING_OPEN:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100801 if (!mesh_plink_free_count(sdata) ||
Johannes Bergd0709a62008-02-25 16:27:46 +0100802 (sta->plid && sta->plid != plid))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100803 event = OPN_IGNR;
804 else
805 event = OPN_ACPT;
806 break;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700807 case WLAN_SP_MESH_PEERING_CONFIRM:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100808 if (!mesh_plink_free_count(sdata) ||
Johannes Bergd0709a62008-02-25 16:27:46 +0100809 (sta->llid != llid || sta->plid != plid))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100810 event = CNF_IGNR;
811 else
812 event = CNF_ACPT;
813 break;
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700814 case WLAN_SP_MESH_PEERING_CLOSE:
Javier Cardona57cf8042011-05-13 10:45:43 -0700815 if (sta->plink_state == NL80211_PLINK_ESTAB)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100816 /* Do not check for llid or plid. This does not
817 * follow the standard but since multiple plinks
818 * per sta are not supported, it is necessary in
819 * order to avoid a livelock when MP A sees an
820 * establish peer link to MP B but MP B does not
821 * see it. This can be caused by a timeout in
822 * B's peer link establishment or B beign
823 * restarted.
824 */
825 event = CLS_ACPT;
826 else if (sta->plid != plid)
827 event = CLS_IGNR;
828 else if (ie_len == 7 && sta->llid != llid)
829 event = CLS_IGNR;
830 else
831 event = CLS_ACPT;
832 break;
833 default:
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200834 mpl_dbg(sdata, "Mesh plink: unknown frame subtype\n");
Johannes Bergd0709a62008-02-25 16:27:46 +0100835 rcu_read_unlock();
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100836 return;
837 }
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700838 }
839
840 if (event == OPN_ACPT) {
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800841 rcu_read_unlock();
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700842 /* allocate sta entry if necessary and update info */
Thomas Pedersen296fcba2013-01-23 12:18:12 -0800843 sta = mesh_sta_info_get(sdata, mgmt->sa, &elems);
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700844 if (!sta) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200845 mpl_dbg(sdata, "Mesh plink: failed to init peer!\n");
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700846 rcu_read_unlock();
847 return;
848 }
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100849 }
850
Thomas Pedersen95e48ad2013-02-16 10:41:05 -0800851 mpl_dbg(sdata, "peer %pM in state %s got event %s\n", mgmt->sa,
852 mplstates[sta->plink_state], mplevents[event]);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100853 reason = 0;
Thomas Pedersen54ab1ff2012-04-18 19:23:42 -0700854 spin_lock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100855 switch (sta->plink_state) {
856 /* spin_unlock as soon as state is updated at each case */
Javier Cardona57cf8042011-05-13 10:45:43 -0700857 case NL80211_PLINK_LISTEN:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100858 switch (event) {
859 case CLS_ACPT:
860 mesh_plink_fsm_restart(sta);
Johannes Berg07346f812008-05-03 01:02:02 +0200861 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100862 break;
863 case OPN_ACPT:
Javier Cardona57cf8042011-05-13 10:45:43 -0700864 sta->plink_state = NL80211_PLINK_OPN_RCVD;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100865 sta->plid = plid;
866 get_random_bytes(&llid, 2);
867 sta->llid = llid;
Marco Porsch453e66f22012-11-21 18:40:32 -0800868 mesh_plink_timer_set(sta,
869 mshcfg->dot11MeshRetryTimeout);
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100870
871 /* set the non-peer mode to active during peering */
Thomas Pedersen39886b62013-02-13 12:14:19 -0800872 changed |= ieee80211_mps_local_status_update(sdata);
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100873
Johannes Berg07346f812008-05-03 01:02:02 +0200874 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700875 mesh_plink_frame_tx(sdata,
876 WLAN_SP_MESH_PEERING_OPEN,
877 sta->sta.addr, llid, 0, 0);
878 mesh_plink_frame_tx(sdata,
879 WLAN_SP_MESH_PEERING_CONFIRM,
880 sta->sta.addr, llid, plid, 0);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100881 break;
882 default:
Johannes Berg07346f812008-05-03 01:02:02 +0200883 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100884 break;
885 }
886 break;
887
Javier Cardona57cf8042011-05-13 10:45:43 -0700888 case NL80211_PLINK_OPN_SNT:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100889 switch (event) {
890 case OPN_RJCT:
891 case CNF_RJCT:
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700892 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100893 case CLS_ACPT:
894 if (!reason)
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700895 reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100896 sta->reason = reason;
Javier Cardona57cf8042011-05-13 10:45:43 -0700897 sta->plink_state = NL80211_PLINK_HOLDING;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100898 if (!mod_plink_timer(sta,
Marco Porsch453e66f22012-11-21 18:40:32 -0800899 mshcfg->dot11MeshHoldingTimeout))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100900 sta->ignore_plink_timer = true;
901
902 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +0200903 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700904 mesh_plink_frame_tx(sdata,
905 WLAN_SP_MESH_PEERING_CLOSE,
906 sta->sta.addr, llid, plid, reason);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100907 break;
908 case OPN_ACPT:
909 /* retry timer is left untouched */
Javier Cardona57cf8042011-05-13 10:45:43 -0700910 sta->plink_state = NL80211_PLINK_OPN_RCVD;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100911 sta->plid = plid;
912 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +0200913 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700914 mesh_plink_frame_tx(sdata,
915 WLAN_SP_MESH_PEERING_CONFIRM,
916 sta->sta.addr, llid, plid, 0);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100917 break;
918 case CNF_ACPT:
Javier Cardona57cf8042011-05-13 10:45:43 -0700919 sta->plink_state = NL80211_PLINK_CNF_RCVD;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100920 if (!mod_plink_timer(sta,
Marco Porsch453e66f22012-11-21 18:40:32 -0800921 mshcfg->dot11MeshConfirmTimeout))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100922 sta->ignore_plink_timer = true;
923
Johannes Berg07346f812008-05-03 01:02:02 +0200924 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100925 break;
926 default:
Johannes Berg07346f812008-05-03 01:02:02 +0200927 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100928 break;
929 }
930 break;
931
Javier Cardona57cf8042011-05-13 10:45:43 -0700932 case NL80211_PLINK_OPN_RCVD:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100933 switch (event) {
934 case OPN_RJCT:
935 case CNF_RJCT:
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700936 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100937 case CLS_ACPT:
938 if (!reason)
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700939 reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100940 sta->reason = reason;
Javier Cardona57cf8042011-05-13 10:45:43 -0700941 sta->plink_state = NL80211_PLINK_HOLDING;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100942 if (!mod_plink_timer(sta,
Marco Porsch453e66f22012-11-21 18:40:32 -0800943 mshcfg->dot11MeshHoldingTimeout))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100944 sta->ignore_plink_timer = true;
945
946 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +0200947 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700948 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
949 sta->sta.addr, llid, plid, reason);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100950 break;
951 case OPN_ACPT:
952 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +0200953 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700954 mesh_plink_frame_tx(sdata,
955 WLAN_SP_MESH_PEERING_CONFIRM,
956 sta->sta.addr, llid, plid, 0);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100957 break;
958 case CNF_ACPT:
Johannes Bergd0709a62008-02-25 16:27:46 +0100959 del_timer(&sta->plink_timer);
Javier Cardona57cf8042011-05-13 10:45:43 -0700960 sta->plink_state = NL80211_PLINK_ESTAB;
Johannes Berg07346f812008-05-03 01:02:02 +0200961 spin_unlock_bh(&sta->lock);
Marco Porschdf323812012-08-08 07:58:43 +0200962 changed |= mesh_plink_inc_estab_count(sdata);
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -0700963 changed |= mesh_set_ht_prot_mode(sdata);
Thomas Pedersen3b144652013-01-26 16:39:55 -0800964 changed |= mesh_set_short_slot_time(sdata);
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200965 mpl_dbg(sdata, "Mesh plink with %pM ESTABLISHED\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -0700966 sta->sta.addr);
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100967 ieee80211_mps_sta_status_update(sta);
Thomas Pedersen39886b62013-02-13 12:14:19 -0800968 changed |= ieee80211_mps_set_sta_local_pm(sta,
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100969 mshcfg->power_mode);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100970 break;
971 default:
Johannes Berg07346f812008-05-03 01:02:02 +0200972 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100973 break;
974 }
975 break;
976
Javier Cardona57cf8042011-05-13 10:45:43 -0700977 case NL80211_PLINK_CNF_RCVD:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100978 switch (event) {
979 case OPN_RJCT:
980 case CNF_RJCT:
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700981 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100982 case CLS_ACPT:
983 if (!reason)
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700984 reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100985 sta->reason = reason;
Javier Cardona57cf8042011-05-13 10:45:43 -0700986 sta->plink_state = NL80211_PLINK_HOLDING;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100987 if (!mod_plink_timer(sta,
Marco Porsch453e66f22012-11-21 18:40:32 -0800988 mshcfg->dot11MeshHoldingTimeout))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100989 sta->ignore_plink_timer = true;
990
991 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +0200992 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -0700993 mesh_plink_frame_tx(sdata,
994 WLAN_SP_MESH_PEERING_CLOSE,
995 sta->sta.addr, llid, plid, reason);
Johannes Bergff59dc72008-02-25 10:11:50 +0100996 break;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100997 case OPN_ACPT:
Johannes Bergd0709a62008-02-25 16:27:46 +0100998 del_timer(&sta->plink_timer);
Javier Cardona57cf8042011-05-13 10:45:43 -0700999 sta->plink_state = NL80211_PLINK_ESTAB;
Johannes Berg07346f812008-05-03 01:02:02 +02001000 spin_unlock_bh(&sta->lock);
Marco Porschdf323812012-08-08 07:58:43 +02001001 changed |= mesh_plink_inc_estab_count(sdata);
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -07001002 changed |= mesh_set_ht_prot_mode(sdata);
Thomas Pedersen3b144652013-01-26 16:39:55 -08001003 changed |= mesh_set_short_slot_time(sdata);
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02001004 mpl_dbg(sdata, "Mesh plink with %pM ESTABLISHED\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -07001005 sta->sta.addr);
Thomas Pedersen54ef6562011-08-11 19:35:12 -07001006 mesh_plink_frame_tx(sdata,
1007 WLAN_SP_MESH_PEERING_CONFIRM,
1008 sta->sta.addr, llid, plid, 0);
Marco Porsch3f52b7e2013-01-30 18:14:08 +01001009 ieee80211_mps_sta_status_update(sta);
Thomas Pedersen39886b62013-02-13 12:14:19 -08001010 changed |= ieee80211_mps_set_sta_local_pm(sta,
1011 mshcfg->power_mode);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001012 break;
1013 default:
Johannes Berg07346f812008-05-03 01:02:02 +02001014 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001015 break;
1016 }
1017 break;
1018
Javier Cardona57cf8042011-05-13 10:45:43 -07001019 case NL80211_PLINK_ESTAB:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001020 switch (event) {
1021 case CLS_ACPT:
Thomas Pedersen54ef6562011-08-11 19:35:12 -07001022 reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001023 sta->reason = reason;
Marco Porschdf323812012-08-08 07:58:43 +02001024 changed |= __mesh_plink_deactivate(sta);
Javier Cardona57cf8042011-05-13 10:45:43 -07001025 sta->plink_state = NL80211_PLINK_HOLDING;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001026 llid = sta->llid;
Marco Porsch453e66f22012-11-21 18:40:32 -08001027 mod_plink_timer(sta, mshcfg->dot11MeshHoldingTimeout);
Johannes Berg07346f812008-05-03 01:02:02 +02001028 spin_unlock_bh(&sta->lock);
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -07001029 changed |= mesh_set_ht_prot_mode(sdata);
Thomas Pedersen3b144652013-01-26 16:39:55 -08001030 changed |= mesh_set_short_slot_time(sdata);
Thomas Pedersen54ef6562011-08-11 19:35:12 -07001031 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
1032 sta->sta.addr, llid, plid, reason);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001033 break;
1034 case OPN_ACPT:
1035 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +02001036 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -07001037 mesh_plink_frame_tx(sdata,
1038 WLAN_SP_MESH_PEERING_CONFIRM,
1039 sta->sta.addr, llid, plid, 0);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001040 break;
1041 default:
Johannes Berg07346f812008-05-03 01:02:02 +02001042 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001043 break;
1044 }
1045 break;
Javier Cardona57cf8042011-05-13 10:45:43 -07001046 case NL80211_PLINK_HOLDING:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001047 switch (event) {
1048 case CLS_ACPT:
Johannes Bergd0709a62008-02-25 16:27:46 +01001049 if (del_timer(&sta->plink_timer))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001050 sta->ignore_plink_timer = 1;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001051 mesh_plink_fsm_restart(sta);
Johannes Berg07346f812008-05-03 01:02:02 +02001052 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001053 break;
1054 case OPN_ACPT:
1055 case CNF_ACPT:
1056 case OPN_RJCT:
1057 case CNF_RJCT:
1058 llid = sta->llid;
1059 reason = sta->reason;
Johannes Berg07346f812008-05-03 01:02:02 +02001060 spin_unlock_bh(&sta->lock);
Thomas Pedersen54ef6562011-08-11 19:35:12 -07001061 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
1062 sta->sta.addr, llid, plid, reason);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001063 break;
1064 default:
Johannes Berg07346f812008-05-03 01:02:02 +02001065 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001066 }
1067 break;
1068 default:
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -08001069 /* should not get here, PLINK_BLOCKED is dealt with at the
Daniel Mack3ad2f3f2010-02-03 08:01:28 +08001070 * beginning of the function
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001071 */
Johannes Berg07346f812008-05-03 01:02:02 +02001072 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001073 break;
1074 }
Johannes Bergd0709a62008-02-25 16:27:46 +01001075
1076 rcu_read_unlock();
Ashok Nagarajan57aac7c2012-04-30 14:20:30 -07001077
Thomas Pedersenecccd072013-06-10 13:17:21 -07001078 if (changed)
Thomas Pedersen2b5e1962013-02-14 11:20:13 -08001079 ieee80211_mbss_info_change_notify(sdata, changed);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +01001080}