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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 */
Johannes Berg902acc72008-02-23 15:17:19 +01009#include <linux/kernel.h>
10#include <linux/random.h>
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010011#include "ieee80211_i.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040012#include "rate.h"
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010013#include "mesh.h"
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010014
15#ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG
16#define mpl_dbg(fmt, args...) printk(KERN_DEBUG fmt, ##args)
17#else
18#define mpl_dbg(fmt, args...) do { (void)(0); } while (0)
19#endif
20
Rui Paulo09383932009-11-09 23:46:43 +000021#define PLINK_GET_LLID(p) (p + 4)
22#define PLINK_GET_PLID(p) (p + 6)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010023
24#define mod_plink_timer(s, t) (mod_timer(&s->plink_timer, \
25 jiffies + HZ * t / 1000))
26
27/* Peer link cancel reasons, all subject to ANA approval */
28#define MESH_LINK_CANCELLED 2
29#define MESH_MAX_NEIGHBORS 3
30#define MESH_CAPABILITY_POLICY_VIOLATION 4
31#define MESH_CLOSE_RCVD 5
32#define MESH_MAX_RETRIES 6
33#define MESH_CONFIRM_TIMEOUT 7
34#define MESH_SECURITY_ROLE_NEGOTIATION_DIFFERS 8
35#define MESH_SECURITY_AUTHENTICATION_IMPOSSIBLE 9
36#define MESH_SECURITY_FAILED_VERIFICATION 10
37
Johannes Berg472dbc42008-09-11 00:01:49 +020038#define dot11MeshMaxRetries(s) (s->u.mesh.mshcfg.dot11MeshMaxRetries)
39#define dot11MeshRetryTimeout(s) (s->u.mesh.mshcfg.dot11MeshRetryTimeout)
40#define dot11MeshConfirmTimeout(s) (s->u.mesh.mshcfg.dot11MeshConfirmTimeout)
41#define dot11MeshHoldingTimeout(s) (s->u.mesh.mshcfg.dot11MeshHoldingTimeout)
42#define dot11MeshMaxPeerLinks(s) (s->u.mesh.mshcfg.dot11MeshMaxPeerLinks)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010043
44enum plink_frame_type {
45 PLINK_OPEN = 0,
46 PLINK_CONFIRM,
47 PLINK_CLOSE
48};
49
50enum plink_event {
51 PLINK_UNDEFINED,
52 OPN_ACPT,
53 OPN_RJCT,
54 OPN_IGNR,
55 CNF_ACPT,
56 CNF_RJCT,
57 CNF_IGNR,
58 CLS_ACPT,
59 CLS_IGNR
60};
61
62static inline
63void mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata)
64{
Johannes Berg472dbc42008-09-11 00:01:49 +020065 atomic_inc(&sdata->u.mesh.mshstats.estab_plinks);
Johannes Bergd0709a62008-02-25 16:27:46 +010066 mesh_accept_plinks_update(sdata);
Rui Paulo8f2fda92009-11-09 23:46:41 +000067 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010068}
69
70static inline
71void mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata)
72{
Johannes Berg472dbc42008-09-11 00:01:49 +020073 atomic_dec(&sdata->u.mesh.mshstats.estab_plinks);
Johannes Bergd0709a62008-02-25 16:27:46 +010074 mesh_accept_plinks_update(sdata);
Rui Paulo8f2fda92009-11-09 23:46:41 +000075 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010076}
77
78/**
79 * mesh_plink_fsm_restart - restart a mesh peer link finite state machine
80 *
Rui Paulo23c7a292009-11-09 23:46:42 +000081 * @sta: mesh peer link to restart
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010082 *
Johannes Berg07346f812008-05-03 01:02:02 +020083 * Locking: this function must be called holding sta->lock
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010084 */
85static inline void mesh_plink_fsm_restart(struct sta_info *sta)
86{
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -080087 sta->plink_state = PLINK_LISTEN;
Luis Carlos Cobo37659ff2008-02-29 12:13:38 -080088 sta->llid = sta->plid = sta->reason = 0;
89 sta->plink_retries = 0;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010090}
91
Johannes Berg93e5deb2008-04-01 15:21:00 +020092/*
93 * NOTE: This is just an alias for sta_info_alloc(), see notes
94 * on it in the lifecycle management section!
95 */
Johannes Berg03e44972008-02-27 09:56:40 +010096static struct sta_info *mesh_plink_alloc(struct ieee80211_sub_if_data *sdata,
Johannes Berg881d9482009-01-21 15:13:48 +010097 u8 *hw_addr, u32 rates)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +010098{
Johannes Bergd0709a62008-02-25 16:27:46 +010099 struct ieee80211_local *local = sdata->local;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100100 struct sta_info *sta;
101
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100102 if (local->num_sta >= MESH_MAX_PLINKS)
Johannes Berg73651ee2008-02-25 16:27:47 +0100103 return NULL;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100104
Johannes Berg03e44972008-02-27 09:56:40 +0100105 sta = sta_info_alloc(sdata, hw_addr, GFP_ATOMIC);
Johannes Berg73651ee2008-02-25 16:27:47 +0100106 if (!sta)
107 return NULL;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100108
Johannes Berg07346f812008-05-03 01:02:02 +0200109 sta->flags = WLAN_STA_AUTHORIZED;
Johannes Berg323ce792008-09-11 02:45:11 +0200110 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
Christian Lamparterb973c312008-12-27 22:19:49 +0100111 rate_control_rate_init(sta);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100112
113 return sta;
114}
115
116/**
Johannes Berg42096b62008-02-25 21:36:27 +0100117 * mesh_plink_deactivate - deactivate mesh peer link
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100118 *
119 * @sta: mesh peer link to deactivate
120 *
121 * All mesh paths with this peer as next hop will be flushed
122 *
Johannes Berg07346f812008-05-03 01:02:02 +0200123 * Locking: the caller must hold sta->lock
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100124 */
Johannes Berg902acc72008-02-23 15:17:19 +0100125static void __mesh_plink_deactivate(struct sta_info *sta)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100126{
Johannes Bergd0709a62008-02-25 16:27:46 +0100127 struct ieee80211_sub_if_data *sdata = sta->sdata;
128
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800129 if (sta->plink_state == PLINK_ESTAB)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100130 mesh_plink_dec_estab_count(sdata);
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800131 sta->plink_state = PLINK_BLOCKED;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100132 mesh_path_flush_by_nexthop(sta);
133}
134
Johannes Berg902acc72008-02-23 15:17:19 +0100135/**
136 * __mesh_plink_deactivate - deactivate mesh peer link
137 *
138 * @sta: mesh peer link to deactivate
139 *
140 * All mesh paths with this peer as next hop will be flushed
141 */
142void mesh_plink_deactivate(struct sta_info *sta)
143{
Johannes Berg07346f812008-05-03 01:02:02 +0200144 spin_lock_bh(&sta->lock);
Johannes Berg902acc72008-02-23 15:17:19 +0100145 __mesh_plink_deactivate(sta);
Johannes Berg07346f812008-05-03 01:02:02 +0200146 spin_unlock_bh(&sta->lock);
Johannes Berg902acc72008-02-23 15:17:19 +0100147}
148
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200149static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100150 enum plink_frame_type action, u8 *da, __le16 llid, __le16 plid,
151 __le16 reason) {
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200152 struct ieee80211_local *local = sdata->local;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100153 struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
154 struct ieee80211_mgmt *mgmt;
155 bool include_plid = false;
Rui Paulo09383932009-11-09 23:46:43 +0000156 static const u8 meshpeeringproto[] = { 0x00, 0x0F, 0xAC, 0x2A };
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100157 u8 *pos;
158 int ie_len;
159
160 if (!skb)
161 return -1;
162 skb_reserve(skb, local->hw.extra_tx_headroom);
163 /* 25 is the size of the common mgmt part (24) plus the size of the
164 * common action part (1)
165 */
166 mgmt = (struct ieee80211_mgmt *)
167 skb_put(skb, 25 + sizeof(mgmt->u.action.u.plink_action));
168 memset(mgmt, 0, 25 + sizeof(mgmt->u.action.u.plink_action));
Harvey Harrisone7827a72008-07-15 18:44:13 -0700169 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
170 IEEE80211_STYPE_ACTION);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100171 memcpy(mgmt->da, da, ETH_ALEN);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200172 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100173 /* BSSID is left zeroed, wildcard value */
Rui Paulo09383932009-11-09 23:46:43 +0000174 mgmt->u.action.category = MESH_PLINK_CATEGORY;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100175 mgmt->u.action.u.plink_action.action_code = action;
176
177 if (action == PLINK_CLOSE)
178 mgmt->u.action.u.plink_action.aux = reason;
179 else {
180 mgmt->u.action.u.plink_action.aux = cpu_to_le16(0x0);
181 if (action == PLINK_CONFIRM) {
182 pos = skb_put(skb, 4);
183 /* two-byte status code followed by two-byte AID */
Rui Paulo77fa76b2009-11-09 23:46:52 +0000184 memset(pos, 0, 2);
185 memcpy(pos + 2, &plid, 2);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100186 }
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200187 mesh_mgmt_ies_add(skb, sdata);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100188 }
189
190 /* Add Peer Link Management element */
191 switch (action) {
192 case PLINK_OPEN:
Rui Paulo09383932009-11-09 23:46:43 +0000193 ie_len = 6;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100194 break;
195 case PLINK_CONFIRM:
Rui Paulo09383932009-11-09 23:46:43 +0000196 ie_len = 8;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100197 include_plid = true;
198 break;
199 case PLINK_CLOSE:
200 default:
201 if (!plid)
Rui Paulo09383932009-11-09 23:46:43 +0000202 ie_len = 8;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100203 else {
Rui Paulo09383932009-11-09 23:46:43 +0000204 ie_len = 10;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100205 include_plid = true;
206 }
207 break;
208 }
209
210 pos = skb_put(skb, 2 + ie_len);
211 *pos++ = WLAN_EID_PEER_LINK;
212 *pos++ = ie_len;
Rui Paulo09383932009-11-09 23:46:43 +0000213 memcpy(pos, meshpeeringproto, sizeof(meshpeeringproto));
214 pos += 4;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100215 memcpy(pos, &llid, 2);
216 if (include_plid) {
217 pos += 2;
218 memcpy(pos, &plid, 2);
219 }
220 if (action == PLINK_CLOSE) {
221 pos += 2;
222 memcpy(pos, &reason, 2);
223 }
224
Johannes Berg62ae67b2009-11-18 18:42:05 +0100225 ieee80211_tx_skb(sdata, skb);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100226 return 0;
227}
228
Johannes Berg881d9482009-01-21 15:13:48 +0100229void mesh_neighbour_update(u8 *hw_addr, u32 rates, struct ieee80211_sub_if_data *sdata,
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100230 bool peer_accepting_plinks)
231{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200232 struct ieee80211_local *local = sdata->local;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100233 struct sta_info *sta;
234
Johannes Bergd0709a62008-02-25 16:27:46 +0100235 rcu_read_lock();
236
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100237 sta = sta_info_get(local, hw_addr);
238 if (!sta) {
Johannes Berg03e44972008-02-27 09:56:40 +0100239 sta = mesh_plink_alloc(sdata, hw_addr, rates);
Johannes Berg73651ee2008-02-25 16:27:47 +0100240 if (!sta) {
241 rcu_read_unlock();
242 return;
243 }
244 if (sta_info_insert(sta)) {
Johannes Bergd0709a62008-02-25 16:27:46 +0100245 rcu_read_unlock();
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100246 return;
Johannes Bergd0709a62008-02-25 16:27:46 +0100247 }
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100248 }
249
250 sta->last_rx = jiffies;
Johannes Berg323ce792008-09-11 02:45:11 +0200251 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800252 if (peer_accepting_plinks && sta->plink_state == PLINK_LISTEN &&
Johannes Berg472dbc42008-09-11 00:01:49 +0200253 sdata->u.mesh.accepting_plinks &&
254 sdata->u.mesh.mshcfg.auto_open_plinks)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100255 mesh_plink_open(sta);
256
Johannes Bergd0709a62008-02-25 16:27:46 +0100257 rcu_read_unlock();
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100258}
259
260static void mesh_plink_timer(unsigned long data)
261{
262 struct sta_info *sta;
263 __le16 llid, plid, reason;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100264 struct ieee80211_sub_if_data *sdata;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100265
Johannes Bergd0709a62008-02-25 16:27:46 +0100266 /*
267 * This STA is valid because sta_info_destroy() will
268 * del_timer_sync() this timer after having made sure
269 * it cannot be readded (by deleting the plink.)
270 */
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100271 sta = (struct sta_info *) data;
272
Johannes Berg5bb644a2009-05-17 11:40:42 +0200273 if (sta->sdata->local->quiescing) {
274 sta->plink_timer_was_running = true;
275 return;
276 }
277
Johannes Berg07346f812008-05-03 01:02:02 +0200278 spin_lock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100279 if (sta->ignore_plink_timer) {
280 sta->ignore_plink_timer = false;
Johannes Berg07346f812008-05-03 01:02:02 +0200281 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100282 return;
283 }
Johannes Berg0c68ae262008-10-27 15:56:10 -0700284 mpl_dbg("Mesh plink timer for %pM fired on state %d\n",
285 sta->sta.addr, sta->plink_state);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100286 reason = 0;
287 llid = sta->llid;
288 plid = sta->plid;
Johannes Bergd0709a62008-02-25 16:27:46 +0100289 sdata = sta->sdata;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100290
291 switch (sta->plink_state) {
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800292 case PLINK_OPN_RCVD:
293 case PLINK_OPN_SNT:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100294 /* retry timer */
295 if (sta->plink_retries < dot11MeshMaxRetries(sdata)) {
296 u32 rand;
Johannes Berg0c68ae262008-10-27 15:56:10 -0700297 mpl_dbg("Mesh plink for %pM (retry, timeout): %d %d\n",
298 sta->sta.addr, sta->plink_retries,
299 sta->plink_timeout);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100300 get_random_bytes(&rand, sizeof(u32));
301 sta->plink_timeout = sta->plink_timeout +
302 rand % sta->plink_timeout;
303 ++sta->plink_retries;
Johannes Bergd0709a62008-02-25 16:27:46 +0100304 mod_plink_timer(sta, sta->plink_timeout);
Johannes Berg07346f812008-05-03 01:02:02 +0200305 spin_unlock_bh(&sta->lock);
Johannes Berg17741cd2008-09-11 00:02:02 +0200306 mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid,
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100307 0, 0);
308 break;
309 }
310 reason = cpu_to_le16(MESH_MAX_RETRIES);
311 /* fall through on else */
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800312 case PLINK_CNF_RCVD:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100313 /* confirm timer */
314 if (!reason)
315 reason = cpu_to_le16(MESH_CONFIRM_TIMEOUT);
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800316 sta->plink_state = PLINK_HOLDING;
Johannes Bergd0709a62008-02-25 16:27:46 +0100317 mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata));
Johannes Berg07346f812008-05-03 01:02:02 +0200318 spin_unlock_bh(&sta->lock);
Johannes Berg17741cd2008-09-11 00:02:02 +0200319 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, plid,
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100320 reason);
321 break;
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800322 case PLINK_HOLDING:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100323 /* holding timer */
Johannes Bergd0709a62008-02-25 16:27:46 +0100324 del_timer(&sta->plink_timer);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100325 mesh_plink_fsm_restart(sta);
Johannes Berg07346f812008-05-03 01:02:02 +0200326 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100327 break;
328 default:
Johannes Berg07346f812008-05-03 01:02:02 +0200329 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100330 break;
331 }
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100332}
333
Johannes Berg5bb644a2009-05-17 11:40:42 +0200334#ifdef CONFIG_PM
335void mesh_plink_quiesce(struct sta_info *sta)
336{
337 if (del_timer_sync(&sta->plink_timer))
338 sta->plink_timer_was_running = true;
339}
340
341void mesh_plink_restart(struct sta_info *sta)
342{
343 if (sta->plink_timer_was_running) {
344 add_timer(&sta->plink_timer);
345 sta->plink_timer_was_running = false;
346 }
347}
348#endif
349
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100350static inline void mesh_plink_timer_set(struct sta_info *sta, int timeout)
351{
352 sta->plink_timer.expires = jiffies + (HZ * timeout / 1000);
353 sta->plink_timer.data = (unsigned long) sta;
354 sta->plink_timer.function = mesh_plink_timer;
355 sta->plink_timeout = timeout;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100356 add_timer(&sta->plink_timer);
357}
358
359int mesh_plink_open(struct sta_info *sta)
360{
361 __le16 llid;
Johannes Bergd0709a62008-02-25 16:27:46 +0100362 struct ieee80211_sub_if_data *sdata = sta->sdata;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100363
Johannes Berg07346f812008-05-03 01:02:02 +0200364 spin_lock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100365 get_random_bytes(&llid, 2);
366 sta->llid = llid;
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800367 if (sta->plink_state != PLINK_LISTEN) {
Johannes Berg07346f812008-05-03 01:02:02 +0200368 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100369 return -EBUSY;
370 }
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800371 sta->plink_state = PLINK_OPN_SNT;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100372 mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata));
Johannes Berg07346f812008-05-03 01:02:02 +0200373 spin_unlock_bh(&sta->lock);
Johannes Berg0c68ae262008-10-27 15:56:10 -0700374 mpl_dbg("Mesh plink: starting establishment with %pM\n",
375 sta->sta.addr);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100376
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200377 return mesh_plink_frame_tx(sdata, PLINK_OPEN,
Johannes Berg17741cd2008-09-11 00:02:02 +0200378 sta->sta.addr, llid, 0, 0);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100379}
380
381void mesh_plink_block(struct sta_info *sta)
382{
Johannes Berg07346f812008-05-03 01:02:02 +0200383 spin_lock_bh(&sta->lock);
Johannes Berg902acc72008-02-23 15:17:19 +0100384 __mesh_plink_deactivate(sta);
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800385 sta->plink_state = PLINK_BLOCKED;
Johannes Berg07346f812008-05-03 01:02:02 +0200386 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100387}
388
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100389
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200390void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt,
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100391 size_t len, struct ieee80211_rx_status *rx_status)
392{
Johannes Bergd0709a62008-02-25 16:27:46 +0100393 struct ieee80211_local *local = sdata->local;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100394 struct ieee802_11_elems elems;
395 struct sta_info *sta;
396 enum plink_event event;
397 enum plink_frame_type ftype;
398 size_t baselen;
399 u8 ie_len;
400 u8 *baseaddr;
401 __le16 plid, llid, reason;
Rui Paulo1460dd12009-11-09 23:46:48 +0000402#ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG
403 static const char *mplstates[] = {
404 [PLINK_LISTEN] = "LISTEN",
405 [PLINK_OPN_SNT] = "OPN-SNT",
406 [PLINK_OPN_RCVD] = "OPN-RCVD",
407 [PLINK_CNF_RCVD] = "CNF_RCVD",
408 [PLINK_ESTAB] = "ESTAB",
409 [PLINK_HOLDING] = "HOLDING",
410 [PLINK_BLOCKED] = "BLOCKED"
411 };
412#endif
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100413
Johannes Berg9c80d3d2008-09-08 15:41:59 +0200414 /* need action_code, aux */
415 if (len < IEEE80211_MIN_ACTION_SIZE + 3)
416 return;
417
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100418 if (is_multicast_ether_addr(mgmt->da)) {
419 mpl_dbg("Mesh plink: ignore frame from multicast address");
420 return;
421 }
422
423 baseaddr = mgmt->u.action.u.plink_action.variable;
424 baselen = (u8 *) mgmt->u.action.u.plink_action.variable - (u8 *) mgmt;
425 if (mgmt->u.action.u.plink_action.action_code == PLINK_CONFIRM) {
426 baseaddr += 4;
David Woo70bdb6b2009-08-12 11:03:44 -0700427 baselen += 4;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100428 }
429 ieee802_11_parse_elems(baseaddr, len - baselen, &elems);
430 if (!elems.peer_link) {
431 mpl_dbg("Mesh plink: missing necessary peer link ie\n");
432 return;
433 }
434
Rui Paulo09383932009-11-09 23:46:43 +0000435 ftype = mgmt->u.action.u.plink_action.action_code;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100436 ie_len = elems.peer_link_len;
Rui Paulo09383932009-11-09 23:46:43 +0000437 if ((ftype == PLINK_OPEN && ie_len != 6) ||
438 (ftype == PLINK_CONFIRM && ie_len != 8) ||
439 (ftype == PLINK_CLOSE && ie_len != 8 && ie_len != 10)) {
440 mpl_dbg("Mesh plink: incorrect plink ie length %d %d\n",
441 ftype, ie_len);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100442 return;
443 }
444
445 if (ftype != PLINK_CLOSE && (!elems.mesh_id || !elems.mesh_config)) {
446 mpl_dbg("Mesh plink: missing necessary ie\n");
447 return;
448 }
449 /* Note the lines below are correct, the llid in the frame is the plid
450 * from the point of view of this host.
451 */
452 memcpy(&plid, PLINK_GET_LLID(elems.peer_link), 2);
Rui Paulo09383932009-11-09 23:46:43 +0000453 if (ftype == PLINK_CONFIRM || (ftype == PLINK_CLOSE && ie_len == 10))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100454 memcpy(&llid, PLINK_GET_PLID(elems.peer_link), 2);
455
Johannes Bergd0709a62008-02-25 16:27:46 +0100456 rcu_read_lock();
457
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100458 sta = sta_info_get(local, mgmt->sa);
459 if (!sta && ftype != PLINK_OPEN) {
460 mpl_dbg("Mesh plink: cls or cnf from unknown peer\n");
Johannes Bergd0709a62008-02-25 16:27:46 +0100461 rcu_read_unlock();
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100462 return;
463 }
464
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800465 if (sta && sta->plink_state == PLINK_BLOCKED) {
Johannes Bergd0709a62008-02-25 16:27:46 +0100466 rcu_read_unlock();
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100467 return;
468 }
469
470 /* Now we will figure out the appropriate event... */
471 event = PLINK_UNDEFINED;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200472 if (ftype != PLINK_CLOSE && (!mesh_matches_local(&elems, sdata))) {
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100473 switch (ftype) {
474 case PLINK_OPEN:
475 event = OPN_RJCT;
476 break;
477 case PLINK_CONFIRM:
478 event = CNF_RJCT;
479 break;
480 case PLINK_CLOSE:
481 /* avoid warning */
482 break;
483 }
Johannes Berg07346f812008-05-03 01:02:02 +0200484 spin_lock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100485 } else if (!sta) {
486 /* ftype == PLINK_OPEN */
Johannes Berg881d9482009-01-21 15:13:48 +0100487 u32 rates;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100488 if (!mesh_plink_free_count(sdata)) {
489 mpl_dbg("Mesh plink error: no more free plinks\n");
Johannes Bergd0709a62008-02-25 16:27:46 +0100490 rcu_read_unlock();
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100491 return;
492 }
493
494 rates = ieee80211_sta_get_rates(local, &elems, rx_status->band);
Johannes Berg03e44972008-02-27 09:56:40 +0100495 sta = mesh_plink_alloc(sdata, mgmt->sa, rates);
Johannes Berg73651ee2008-02-25 16:27:47 +0100496 if (!sta) {
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100497 mpl_dbg("Mesh plink error: plink table full\n");
Johannes Bergd0709a62008-02-25 16:27:46 +0100498 rcu_read_unlock();
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100499 return;
500 }
Johannes Berg73651ee2008-02-25 16:27:47 +0100501 if (sta_info_insert(sta)) {
Johannes Berg73651ee2008-02-25 16:27:47 +0100502 rcu_read_unlock();
503 return;
504 }
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100505 event = OPN_ACPT;
Johannes Berg07346f812008-05-03 01:02:02 +0200506 spin_lock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100507 } else {
Johannes Berg07346f812008-05-03 01:02:02 +0200508 spin_lock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100509 switch (ftype) {
510 case PLINK_OPEN:
511 if (!mesh_plink_free_count(sdata) ||
Johannes Bergd0709a62008-02-25 16:27:46 +0100512 (sta->plid && sta->plid != plid))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100513 event = OPN_IGNR;
514 else
515 event = OPN_ACPT;
516 break;
517 case PLINK_CONFIRM:
518 if (!mesh_plink_free_count(sdata) ||
Johannes Bergd0709a62008-02-25 16:27:46 +0100519 (sta->llid != llid || sta->plid != plid))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100520 event = CNF_IGNR;
521 else
522 event = CNF_ACPT;
523 break;
524 case PLINK_CLOSE:
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800525 if (sta->plink_state == PLINK_ESTAB)
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100526 /* Do not check for llid or plid. This does not
527 * follow the standard but since multiple plinks
528 * per sta are not supported, it is necessary in
529 * order to avoid a livelock when MP A sees an
530 * establish peer link to MP B but MP B does not
531 * see it. This can be caused by a timeout in
532 * B's peer link establishment or B beign
533 * restarted.
534 */
535 event = CLS_ACPT;
536 else if (sta->plid != plid)
537 event = CLS_IGNR;
538 else if (ie_len == 7 && sta->llid != llid)
539 event = CLS_IGNR;
540 else
541 event = CLS_ACPT;
542 break;
543 default:
544 mpl_dbg("Mesh plink: unknown frame subtype\n");
Johannes Berg07346f812008-05-03 01:02:02 +0200545 spin_unlock_bh(&sta->lock);
Johannes Bergd0709a62008-02-25 16:27:46 +0100546 rcu_read_unlock();
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100547 return;
548 }
549 }
550
Rui Paulo1460dd12009-11-09 23:46:48 +0000551 mpl_dbg("Mesh plink (peer, state, llid, plid, event): %pM %s %d %d %d\n",
552 mgmt->sa, mplstates[sta->plink_state],
Johannes Berg0c68ae262008-10-27 15:56:10 -0700553 le16_to_cpu(sta->llid), le16_to_cpu(sta->plid),
554 event);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100555 reason = 0;
556 switch (sta->plink_state) {
557 /* spin_unlock as soon as state is updated at each case */
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800558 case PLINK_LISTEN:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100559 switch (event) {
560 case CLS_ACPT:
561 mesh_plink_fsm_restart(sta);
Johannes Berg07346f812008-05-03 01:02:02 +0200562 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100563 break;
564 case OPN_ACPT:
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800565 sta->plink_state = PLINK_OPN_RCVD;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100566 sta->plid = plid;
567 get_random_bytes(&llid, 2);
568 sta->llid = llid;
569 mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata));
Johannes Berg07346f812008-05-03 01:02:02 +0200570 spin_unlock_bh(&sta->lock);
Johannes Berg17741cd2008-09-11 00:02:02 +0200571 mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid,
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100572 0, 0);
Johannes Berg17741cd2008-09-11 00:02:02 +0200573 mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr,
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100574 llid, plid, 0);
575 break;
576 default:
Johannes Berg07346f812008-05-03 01:02:02 +0200577 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100578 break;
579 }
580 break;
581
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800582 case PLINK_OPN_SNT:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100583 switch (event) {
584 case OPN_RJCT:
585 case CNF_RJCT:
586 reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION);
587 case CLS_ACPT:
588 if (!reason)
589 reason = cpu_to_le16(MESH_CLOSE_RCVD);
590 sta->reason = reason;
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800591 sta->plink_state = PLINK_HOLDING;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100592 if (!mod_plink_timer(sta,
593 dot11MeshHoldingTimeout(sdata)))
594 sta->ignore_plink_timer = true;
595
596 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +0200597 spin_unlock_bh(&sta->lock);
Johannes Berg17741cd2008-09-11 00:02:02 +0200598 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100599 plid, reason);
600 break;
601 case OPN_ACPT:
602 /* retry timer is left untouched */
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800603 sta->plink_state = PLINK_OPN_RCVD;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100604 sta->plid = plid;
605 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +0200606 spin_unlock_bh(&sta->lock);
Johannes Berg17741cd2008-09-11 00:02:02 +0200607 mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100608 plid, 0);
609 break;
610 case CNF_ACPT:
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800611 sta->plink_state = PLINK_CNF_RCVD;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100612 if (!mod_plink_timer(sta,
613 dot11MeshConfirmTimeout(sdata)))
614 sta->ignore_plink_timer = true;
615
Johannes Berg07346f812008-05-03 01:02:02 +0200616 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100617 break;
618 default:
Johannes Berg07346f812008-05-03 01:02:02 +0200619 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100620 break;
621 }
622 break;
623
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800624 case PLINK_OPN_RCVD:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100625 switch (event) {
626 case OPN_RJCT:
627 case CNF_RJCT:
628 reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION);
629 case CLS_ACPT:
630 if (!reason)
631 reason = cpu_to_le16(MESH_CLOSE_RCVD);
632 sta->reason = reason;
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800633 sta->plink_state = PLINK_HOLDING;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100634 if (!mod_plink_timer(sta,
635 dot11MeshHoldingTimeout(sdata)))
636 sta->ignore_plink_timer = true;
637
638 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +0200639 spin_unlock_bh(&sta->lock);
Johannes Berg17741cd2008-09-11 00:02:02 +0200640 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100641 plid, reason);
642 break;
643 case OPN_ACPT:
644 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +0200645 spin_unlock_bh(&sta->lock);
Johannes Berg17741cd2008-09-11 00:02:02 +0200646 mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100647 plid, 0);
648 break;
649 case CNF_ACPT:
Johannes Bergd0709a62008-02-25 16:27:46 +0100650 del_timer(&sta->plink_timer);
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800651 sta->plink_state = PLINK_ESTAB;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100652 mesh_plink_inc_estab_count(sdata);
Johannes Berg07346f812008-05-03 01:02:02 +0200653 spin_unlock_bh(&sta->lock);
Johannes Berg0c68ae262008-10-27 15:56:10 -0700654 mpl_dbg("Mesh plink with %pM ESTABLISHED\n",
655 sta->sta.addr);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100656 break;
657 default:
Johannes Berg07346f812008-05-03 01:02:02 +0200658 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100659 break;
660 }
661 break;
662
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800663 case PLINK_CNF_RCVD:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100664 switch (event) {
665 case OPN_RJCT:
666 case CNF_RJCT:
667 reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION);
668 case CLS_ACPT:
669 if (!reason)
670 reason = cpu_to_le16(MESH_CLOSE_RCVD);
671 sta->reason = reason;
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800672 sta->plink_state = PLINK_HOLDING;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100673 if (!mod_plink_timer(sta,
674 dot11MeshHoldingTimeout(sdata)))
675 sta->ignore_plink_timer = true;
676
677 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +0200678 spin_unlock_bh(&sta->lock);
Johannes Berg17741cd2008-09-11 00:02:02 +0200679 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100680 plid, reason);
Johannes Bergff59dc72008-02-25 10:11:50 +0100681 break;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100682 case OPN_ACPT:
Johannes Bergd0709a62008-02-25 16:27:46 +0100683 del_timer(&sta->plink_timer);
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800684 sta->plink_state = PLINK_ESTAB;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100685 mesh_plink_inc_estab_count(sdata);
Johannes Berg07346f812008-05-03 01:02:02 +0200686 spin_unlock_bh(&sta->lock);
Johannes Berg0c68ae262008-10-27 15:56:10 -0700687 mpl_dbg("Mesh plink with %pM ESTABLISHED\n",
688 sta->sta.addr);
Johannes Berg17741cd2008-09-11 00:02:02 +0200689 mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100690 plid, 0);
691 break;
692 default:
Johannes Berg07346f812008-05-03 01:02:02 +0200693 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100694 break;
695 }
696 break;
697
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800698 case PLINK_ESTAB:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100699 switch (event) {
700 case CLS_ACPT:
701 reason = cpu_to_le16(MESH_CLOSE_RCVD);
702 sta->reason = reason;
Johannes Berg902acc72008-02-23 15:17:19 +0100703 __mesh_plink_deactivate(sta);
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800704 sta->plink_state = PLINK_HOLDING;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100705 llid = sta->llid;
Johannes Bergd0709a62008-02-25 16:27:46 +0100706 mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata));
Johannes Berg07346f812008-05-03 01:02:02 +0200707 spin_unlock_bh(&sta->lock);
Johannes Berg17741cd2008-09-11 00:02:02 +0200708 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100709 plid, reason);
710 break;
711 case OPN_ACPT:
712 llid = sta->llid;
Johannes Berg07346f812008-05-03 01:02:02 +0200713 spin_unlock_bh(&sta->lock);
Johannes Berg17741cd2008-09-11 00:02:02 +0200714 mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100715 plid, 0);
716 break;
717 default:
Johannes Berg07346f812008-05-03 01:02:02 +0200718 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100719 break;
720 }
721 break;
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800722 case PLINK_HOLDING:
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100723 switch (event) {
724 case CLS_ACPT:
Johannes Bergd0709a62008-02-25 16:27:46 +0100725 if (del_timer(&sta->plink_timer))
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100726 sta->ignore_plink_timer = 1;
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100727 mesh_plink_fsm_restart(sta);
Johannes Berg07346f812008-05-03 01:02:02 +0200728 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100729 break;
730 case OPN_ACPT:
731 case CNF_ACPT:
732 case OPN_RJCT:
733 case CNF_RJCT:
734 llid = sta->llid;
735 reason = sta->reason;
Johannes Berg07346f812008-05-03 01:02:02 +0200736 spin_unlock_bh(&sta->lock);
Johannes Berg17741cd2008-09-11 00:02:02 +0200737 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr,
738 llid, plid, reason);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100739 break;
740 default:
Johannes Berg07346f812008-05-03 01:02:02 +0200741 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100742 }
743 break;
744 default:
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800745 /* should not get here, PLINK_BLOCKED is dealt with at the
Daniel Mack3ad2f3f2010-02-03 08:01:28 +0800746 * beginning of the function
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100747 */
Johannes Berg07346f812008-05-03 01:02:02 +0200748 spin_unlock_bh(&sta->lock);
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100749 break;
750 }
Johannes Bergd0709a62008-02-25 16:27:46 +0100751
752 rcu_read_unlock();
Luis Carlos Coboc3896d2c2008-02-23 15:17:13 +0100753}