Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2008 open80211s Ltd. |
| 3 | * 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 Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 9 | #include <linux/kernel.h> |
| 10 | #include <linux/random.h> |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 11 | #include "ieee80211_i.h" |
Johannes Berg | 2c8dccc | 2008-04-08 15:14:40 -0400 | [diff] [blame] | 12 | #include "rate.h" |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 13 | #include "mesh.h" |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 14 | |
| 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 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 21 | #define PLINK_GET_FRAME_SUBTYPE(p) (p) |
| 22 | #define PLINK_GET_LLID(p) (p + 1) |
| 23 | #define PLINK_GET_PLID(p) (p + 3) |
| 24 | |
| 25 | #define mod_plink_timer(s, t) (mod_timer(&s->plink_timer, \ |
| 26 | jiffies + HZ * t / 1000)) |
| 27 | |
| 28 | /* Peer link cancel reasons, all subject to ANA approval */ |
| 29 | #define MESH_LINK_CANCELLED 2 |
| 30 | #define MESH_MAX_NEIGHBORS 3 |
| 31 | #define MESH_CAPABILITY_POLICY_VIOLATION 4 |
| 32 | #define MESH_CLOSE_RCVD 5 |
| 33 | #define MESH_MAX_RETRIES 6 |
| 34 | #define MESH_CONFIRM_TIMEOUT 7 |
| 35 | #define MESH_SECURITY_ROLE_NEGOTIATION_DIFFERS 8 |
| 36 | #define MESH_SECURITY_AUTHENTICATION_IMPOSSIBLE 9 |
| 37 | #define MESH_SECURITY_FAILED_VERIFICATION 10 |
| 38 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 39 | #define dot11MeshMaxRetries(s) (s->u.mesh.mshcfg.dot11MeshMaxRetries) |
| 40 | #define dot11MeshRetryTimeout(s) (s->u.mesh.mshcfg.dot11MeshRetryTimeout) |
| 41 | #define dot11MeshConfirmTimeout(s) (s->u.mesh.mshcfg.dot11MeshConfirmTimeout) |
| 42 | #define dot11MeshHoldingTimeout(s) (s->u.mesh.mshcfg.dot11MeshHoldingTimeout) |
| 43 | #define dot11MeshMaxPeerLinks(s) (s->u.mesh.mshcfg.dot11MeshMaxPeerLinks) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 44 | |
| 45 | enum plink_frame_type { |
| 46 | PLINK_OPEN = 0, |
| 47 | PLINK_CONFIRM, |
| 48 | PLINK_CLOSE |
| 49 | }; |
| 50 | |
| 51 | enum plink_event { |
| 52 | PLINK_UNDEFINED, |
| 53 | OPN_ACPT, |
| 54 | OPN_RJCT, |
| 55 | OPN_IGNR, |
| 56 | CNF_ACPT, |
| 57 | CNF_RJCT, |
| 58 | CNF_IGNR, |
| 59 | CLS_ACPT, |
| 60 | CLS_IGNR |
| 61 | }; |
| 62 | |
| 63 | static inline |
| 64 | void mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata) |
| 65 | { |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 66 | atomic_inc(&sdata->u.mesh.mshstats.estab_plinks); |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 67 | mesh_accept_plinks_update(sdata); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 68 | } |
| 69 | |
| 70 | static inline |
| 71 | void mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata) |
| 72 | { |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 73 | atomic_dec(&sdata->u.mesh.mshstats.estab_plinks); |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 74 | mesh_accept_plinks_update(sdata); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | /** |
| 78 | * mesh_plink_fsm_restart - restart a mesh peer link finite state machine |
| 79 | * |
| 80 | * @sta: mes peer link to restart |
| 81 | * |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 82 | * Locking: this function must be called holding sta->lock |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 83 | */ |
| 84 | static inline void mesh_plink_fsm_restart(struct sta_info *sta) |
| 85 | { |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 86 | sta->plink_state = PLINK_LISTEN; |
Luis Carlos Cobo | 37659ff | 2008-02-29 12:13:38 -0800 | [diff] [blame] | 87 | sta->llid = sta->plid = sta->reason = 0; |
| 88 | sta->plink_retries = 0; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 89 | } |
| 90 | |
Johannes Berg | 93e5deb | 2008-04-01 15:21:00 +0200 | [diff] [blame] | 91 | /* |
| 92 | * NOTE: This is just an alias for sta_info_alloc(), see notes |
| 93 | * on it in the lifecycle management section! |
| 94 | */ |
Johannes Berg | 03e4497 | 2008-02-27 09:56:40 +0100 | [diff] [blame] | 95 | static struct sta_info *mesh_plink_alloc(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 881d948 | 2009-01-21 15:13:48 +0100 | [diff] [blame^] | 96 | u8 *hw_addr, u32 rates) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 97 | { |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 98 | struct ieee80211_local *local = sdata->local; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 99 | struct sta_info *sta; |
| 100 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 101 | if (local->num_sta >= MESH_MAX_PLINKS) |
Johannes Berg | 73651ee | 2008-02-25 16:27:47 +0100 | [diff] [blame] | 102 | return NULL; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 103 | |
Johannes Berg | 03e4497 | 2008-02-27 09:56:40 +0100 | [diff] [blame] | 104 | sta = sta_info_alloc(sdata, hw_addr, GFP_ATOMIC); |
Johannes Berg | 73651ee | 2008-02-25 16:27:47 +0100 | [diff] [blame] | 105 | if (!sta) |
| 106 | return NULL; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 107 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 108 | sta->flags = WLAN_STA_AUTHORIZED; |
Johannes Berg | 323ce79 | 2008-09-11 02:45:11 +0200 | [diff] [blame] | 109 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
Christian Lamparter | b973c31 | 2008-12-27 22:19:49 +0100 | [diff] [blame] | 110 | rate_control_rate_init(sta); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 111 | |
| 112 | return sta; |
| 113 | } |
| 114 | |
| 115 | /** |
Johannes Berg | 42096b6 | 2008-02-25 21:36:27 +0100 | [diff] [blame] | 116 | * mesh_plink_deactivate - deactivate mesh peer link |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 117 | * |
| 118 | * @sta: mesh peer link to deactivate |
| 119 | * |
| 120 | * All mesh paths with this peer as next hop will be flushed |
| 121 | * |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 122 | * Locking: the caller must hold sta->lock |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 123 | */ |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 124 | static void __mesh_plink_deactivate(struct sta_info *sta) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 125 | { |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 126 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 127 | |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 128 | if (sta->plink_state == PLINK_ESTAB) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 129 | mesh_plink_dec_estab_count(sdata); |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 130 | sta->plink_state = PLINK_BLOCKED; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 131 | mesh_path_flush_by_nexthop(sta); |
| 132 | } |
| 133 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 134 | /** |
| 135 | * __mesh_plink_deactivate - deactivate mesh peer link |
| 136 | * |
| 137 | * @sta: mesh peer link to deactivate |
| 138 | * |
| 139 | * All mesh paths with this peer as next hop will be flushed |
| 140 | */ |
| 141 | void mesh_plink_deactivate(struct sta_info *sta) |
| 142 | { |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 143 | spin_lock_bh(&sta->lock); |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 144 | __mesh_plink_deactivate(sta); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 145 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 146 | } |
| 147 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 148 | static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 149 | enum plink_frame_type action, u8 *da, __le16 llid, __le16 plid, |
| 150 | __le16 reason) { |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 151 | struct ieee80211_local *local = sdata->local; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 152 | struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); |
| 153 | struct ieee80211_mgmt *mgmt; |
| 154 | bool include_plid = false; |
| 155 | u8 *pos; |
| 156 | int ie_len; |
| 157 | |
| 158 | if (!skb) |
| 159 | return -1; |
| 160 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 161 | /* 25 is the size of the common mgmt part (24) plus the size of the |
| 162 | * common action part (1) |
| 163 | */ |
| 164 | mgmt = (struct ieee80211_mgmt *) |
| 165 | skb_put(skb, 25 + sizeof(mgmt->u.action.u.plink_action)); |
| 166 | memset(mgmt, 0, 25 + sizeof(mgmt->u.action.u.plink_action)); |
Harvey Harrison | e7827a7 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 167 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 168 | IEEE80211_STYPE_ACTION); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 169 | memcpy(mgmt->da, da, ETH_ALEN); |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 170 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 171 | /* BSSID is left zeroed, wildcard value */ |
| 172 | mgmt->u.action.category = PLINK_CATEGORY; |
| 173 | mgmt->u.action.u.plink_action.action_code = action; |
| 174 | |
| 175 | if (action == PLINK_CLOSE) |
| 176 | mgmt->u.action.u.plink_action.aux = reason; |
| 177 | else { |
| 178 | mgmt->u.action.u.plink_action.aux = cpu_to_le16(0x0); |
| 179 | if (action == PLINK_CONFIRM) { |
| 180 | pos = skb_put(skb, 4); |
| 181 | /* two-byte status code followed by two-byte AID */ |
| 182 | memset(pos, 0, 4); |
| 183 | } |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 184 | mesh_mgmt_ies_add(skb, sdata); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 185 | } |
| 186 | |
| 187 | /* Add Peer Link Management element */ |
| 188 | switch (action) { |
| 189 | case PLINK_OPEN: |
| 190 | ie_len = 3; |
| 191 | break; |
| 192 | case PLINK_CONFIRM: |
| 193 | ie_len = 5; |
| 194 | include_plid = true; |
| 195 | break; |
| 196 | case PLINK_CLOSE: |
| 197 | default: |
| 198 | if (!plid) |
| 199 | ie_len = 5; |
| 200 | else { |
| 201 | ie_len = 7; |
| 202 | include_plid = true; |
| 203 | } |
| 204 | break; |
| 205 | } |
| 206 | |
| 207 | pos = skb_put(skb, 2 + ie_len); |
| 208 | *pos++ = WLAN_EID_PEER_LINK; |
| 209 | *pos++ = ie_len; |
| 210 | *pos++ = action; |
| 211 | memcpy(pos, &llid, 2); |
| 212 | if (include_plid) { |
| 213 | pos += 2; |
| 214 | memcpy(pos, &plid, 2); |
| 215 | } |
| 216 | if (action == PLINK_CLOSE) { |
| 217 | pos += 2; |
| 218 | memcpy(pos, &reason, 2); |
| 219 | } |
| 220 | |
Jouni Malinen | 1acc97b | 2009-01-08 13:32:07 +0200 | [diff] [blame] | 221 | ieee80211_tx_skb(sdata, skb, 1); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 222 | return 0; |
| 223 | } |
| 224 | |
Johannes Berg | 881d948 | 2009-01-21 15:13:48 +0100 | [diff] [blame^] | 225 | void mesh_neighbour_update(u8 *hw_addr, u32 rates, struct ieee80211_sub_if_data *sdata, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 226 | bool peer_accepting_plinks) |
| 227 | { |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 228 | struct ieee80211_local *local = sdata->local; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 229 | struct sta_info *sta; |
| 230 | |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 231 | rcu_read_lock(); |
| 232 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 233 | sta = sta_info_get(local, hw_addr); |
| 234 | if (!sta) { |
Johannes Berg | 03e4497 | 2008-02-27 09:56:40 +0100 | [diff] [blame] | 235 | sta = mesh_plink_alloc(sdata, hw_addr, rates); |
Johannes Berg | 73651ee | 2008-02-25 16:27:47 +0100 | [diff] [blame] | 236 | if (!sta) { |
| 237 | rcu_read_unlock(); |
| 238 | return; |
| 239 | } |
| 240 | if (sta_info_insert(sta)) { |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 241 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 242 | return; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 243 | } |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 244 | } |
| 245 | |
| 246 | sta->last_rx = jiffies; |
Johannes Berg | 323ce79 | 2008-09-11 02:45:11 +0200 | [diff] [blame] | 247 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 248 | if (peer_accepting_plinks && sta->plink_state == PLINK_LISTEN && |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 249 | sdata->u.mesh.accepting_plinks && |
| 250 | sdata->u.mesh.mshcfg.auto_open_plinks) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 251 | mesh_plink_open(sta); |
| 252 | |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 253 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | static void mesh_plink_timer(unsigned long data) |
| 257 | { |
| 258 | struct sta_info *sta; |
| 259 | __le16 llid, plid, reason; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 260 | struct ieee80211_sub_if_data *sdata; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 261 | |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 262 | /* |
| 263 | * This STA is valid because sta_info_destroy() will |
| 264 | * del_timer_sync() this timer after having made sure |
| 265 | * it cannot be readded (by deleting the plink.) |
| 266 | */ |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 267 | sta = (struct sta_info *) data; |
| 268 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 269 | spin_lock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 270 | if (sta->ignore_plink_timer) { |
| 271 | sta->ignore_plink_timer = false; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 272 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 273 | return; |
| 274 | } |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 275 | mpl_dbg("Mesh plink timer for %pM fired on state %d\n", |
| 276 | sta->sta.addr, sta->plink_state); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 277 | reason = 0; |
| 278 | llid = sta->llid; |
| 279 | plid = sta->plid; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 280 | sdata = sta->sdata; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 281 | |
| 282 | switch (sta->plink_state) { |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 283 | case PLINK_OPN_RCVD: |
| 284 | case PLINK_OPN_SNT: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 285 | /* retry timer */ |
| 286 | if (sta->plink_retries < dot11MeshMaxRetries(sdata)) { |
| 287 | u32 rand; |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 288 | mpl_dbg("Mesh plink for %pM (retry, timeout): %d %d\n", |
| 289 | sta->sta.addr, sta->plink_retries, |
| 290 | sta->plink_timeout); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 291 | get_random_bytes(&rand, sizeof(u32)); |
| 292 | sta->plink_timeout = sta->plink_timeout + |
| 293 | rand % sta->plink_timeout; |
| 294 | ++sta->plink_retries; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 295 | mod_plink_timer(sta, sta->plink_timeout); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 296 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 297 | mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 298 | 0, 0); |
| 299 | break; |
| 300 | } |
| 301 | reason = cpu_to_le16(MESH_MAX_RETRIES); |
| 302 | /* fall through on else */ |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 303 | case PLINK_CNF_RCVD: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 304 | /* confirm timer */ |
| 305 | if (!reason) |
| 306 | reason = cpu_to_le16(MESH_CONFIRM_TIMEOUT); |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 307 | sta->plink_state = PLINK_HOLDING; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 308 | mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 309 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 310 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, plid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 311 | reason); |
| 312 | break; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 313 | case PLINK_HOLDING: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 314 | /* holding timer */ |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 315 | del_timer(&sta->plink_timer); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 316 | mesh_plink_fsm_restart(sta); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 317 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 318 | break; |
| 319 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 320 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 321 | break; |
| 322 | } |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 323 | } |
| 324 | |
| 325 | static inline void mesh_plink_timer_set(struct sta_info *sta, int timeout) |
| 326 | { |
| 327 | sta->plink_timer.expires = jiffies + (HZ * timeout / 1000); |
| 328 | sta->plink_timer.data = (unsigned long) sta; |
| 329 | sta->plink_timer.function = mesh_plink_timer; |
| 330 | sta->plink_timeout = timeout; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 331 | add_timer(&sta->plink_timer); |
| 332 | } |
| 333 | |
| 334 | int mesh_plink_open(struct sta_info *sta) |
| 335 | { |
| 336 | __le16 llid; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 337 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 338 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 339 | spin_lock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 340 | get_random_bytes(&llid, 2); |
| 341 | sta->llid = llid; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 342 | if (sta->plink_state != PLINK_LISTEN) { |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 343 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 344 | return -EBUSY; |
| 345 | } |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 346 | sta->plink_state = PLINK_OPN_SNT; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 347 | mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 348 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 349 | mpl_dbg("Mesh plink: starting establishment with %pM\n", |
| 350 | sta->sta.addr); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 351 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 352 | return mesh_plink_frame_tx(sdata, PLINK_OPEN, |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 353 | sta->sta.addr, llid, 0, 0); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 354 | } |
| 355 | |
| 356 | void mesh_plink_block(struct sta_info *sta) |
| 357 | { |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 358 | spin_lock_bh(&sta->lock); |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 359 | __mesh_plink_deactivate(sta); |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 360 | sta->plink_state = PLINK_BLOCKED; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 361 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 362 | } |
| 363 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 364 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 365 | void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 366 | size_t len, struct ieee80211_rx_status *rx_status) |
| 367 | { |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 368 | struct ieee80211_local *local = sdata->local; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 369 | struct ieee802_11_elems elems; |
| 370 | struct sta_info *sta; |
| 371 | enum plink_event event; |
| 372 | enum plink_frame_type ftype; |
| 373 | size_t baselen; |
| 374 | u8 ie_len; |
| 375 | u8 *baseaddr; |
| 376 | __le16 plid, llid, reason; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 377 | |
Johannes Berg | 9c80d3d | 2008-09-08 15:41:59 +0200 | [diff] [blame] | 378 | /* need action_code, aux */ |
| 379 | if (len < IEEE80211_MIN_ACTION_SIZE + 3) |
| 380 | return; |
| 381 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 382 | if (is_multicast_ether_addr(mgmt->da)) { |
| 383 | mpl_dbg("Mesh plink: ignore frame from multicast address"); |
| 384 | return; |
| 385 | } |
| 386 | |
| 387 | baseaddr = mgmt->u.action.u.plink_action.variable; |
| 388 | baselen = (u8 *) mgmt->u.action.u.plink_action.variable - (u8 *) mgmt; |
| 389 | if (mgmt->u.action.u.plink_action.action_code == PLINK_CONFIRM) { |
| 390 | baseaddr += 4; |
| 391 | baselen -= 4; |
| 392 | } |
| 393 | ieee802_11_parse_elems(baseaddr, len - baselen, &elems); |
| 394 | if (!elems.peer_link) { |
| 395 | mpl_dbg("Mesh plink: missing necessary peer link ie\n"); |
| 396 | return; |
| 397 | } |
| 398 | |
| 399 | ftype = *((u8 *)PLINK_GET_FRAME_SUBTYPE(elems.peer_link)); |
| 400 | ie_len = elems.peer_link_len; |
| 401 | if ((ftype == PLINK_OPEN && ie_len != 3) || |
| 402 | (ftype == PLINK_CONFIRM && ie_len != 5) || |
| 403 | (ftype == PLINK_CLOSE && ie_len != 5 && ie_len != 7)) { |
| 404 | mpl_dbg("Mesh plink: incorrect plink ie length\n"); |
| 405 | return; |
| 406 | } |
| 407 | |
| 408 | if (ftype != PLINK_CLOSE && (!elems.mesh_id || !elems.mesh_config)) { |
| 409 | mpl_dbg("Mesh plink: missing necessary ie\n"); |
| 410 | return; |
| 411 | } |
| 412 | /* Note the lines below are correct, the llid in the frame is the plid |
| 413 | * from the point of view of this host. |
| 414 | */ |
| 415 | memcpy(&plid, PLINK_GET_LLID(elems.peer_link), 2); |
| 416 | if (ftype == PLINK_CONFIRM || (ftype == PLINK_CLOSE && ie_len == 7)) |
| 417 | memcpy(&llid, PLINK_GET_PLID(elems.peer_link), 2); |
| 418 | |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 419 | rcu_read_lock(); |
| 420 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 421 | sta = sta_info_get(local, mgmt->sa); |
| 422 | if (!sta && ftype != PLINK_OPEN) { |
| 423 | mpl_dbg("Mesh plink: cls or cnf from unknown peer\n"); |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 424 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 425 | return; |
| 426 | } |
| 427 | |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 428 | if (sta && sta->plink_state == PLINK_BLOCKED) { |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 429 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 430 | return; |
| 431 | } |
| 432 | |
| 433 | /* Now we will figure out the appropriate event... */ |
| 434 | event = PLINK_UNDEFINED; |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 435 | if (ftype != PLINK_CLOSE && (!mesh_matches_local(&elems, sdata))) { |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 436 | switch (ftype) { |
| 437 | case PLINK_OPEN: |
| 438 | event = OPN_RJCT; |
| 439 | break; |
| 440 | case PLINK_CONFIRM: |
| 441 | event = CNF_RJCT; |
| 442 | break; |
| 443 | case PLINK_CLOSE: |
| 444 | /* avoid warning */ |
| 445 | break; |
| 446 | } |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 447 | spin_lock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 448 | } else if (!sta) { |
| 449 | /* ftype == PLINK_OPEN */ |
Johannes Berg | 881d948 | 2009-01-21 15:13:48 +0100 | [diff] [blame^] | 450 | u32 rates; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 451 | if (!mesh_plink_free_count(sdata)) { |
| 452 | mpl_dbg("Mesh plink error: no more free plinks\n"); |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 453 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 454 | return; |
| 455 | } |
| 456 | |
| 457 | rates = ieee80211_sta_get_rates(local, &elems, rx_status->band); |
Johannes Berg | 03e4497 | 2008-02-27 09:56:40 +0100 | [diff] [blame] | 458 | sta = mesh_plink_alloc(sdata, mgmt->sa, rates); |
Johannes Berg | 73651ee | 2008-02-25 16:27:47 +0100 | [diff] [blame] | 459 | if (!sta) { |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 460 | mpl_dbg("Mesh plink error: plink table full\n"); |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 461 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 462 | return; |
| 463 | } |
Johannes Berg | 73651ee | 2008-02-25 16:27:47 +0100 | [diff] [blame] | 464 | if (sta_info_insert(sta)) { |
Johannes Berg | 73651ee | 2008-02-25 16:27:47 +0100 | [diff] [blame] | 465 | rcu_read_unlock(); |
| 466 | return; |
| 467 | } |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 468 | event = OPN_ACPT; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 469 | spin_lock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 470 | } else { |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 471 | spin_lock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 472 | switch (ftype) { |
| 473 | case PLINK_OPEN: |
| 474 | if (!mesh_plink_free_count(sdata) || |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 475 | (sta->plid && sta->plid != plid)) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 476 | event = OPN_IGNR; |
| 477 | else |
| 478 | event = OPN_ACPT; |
| 479 | break; |
| 480 | case PLINK_CONFIRM: |
| 481 | if (!mesh_plink_free_count(sdata) || |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 482 | (sta->llid != llid || sta->plid != plid)) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 483 | event = CNF_IGNR; |
| 484 | else |
| 485 | event = CNF_ACPT; |
| 486 | break; |
| 487 | case PLINK_CLOSE: |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 488 | if (sta->plink_state == PLINK_ESTAB) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 489 | /* Do not check for llid or plid. This does not |
| 490 | * follow the standard but since multiple plinks |
| 491 | * per sta are not supported, it is necessary in |
| 492 | * order to avoid a livelock when MP A sees an |
| 493 | * establish peer link to MP B but MP B does not |
| 494 | * see it. This can be caused by a timeout in |
| 495 | * B's peer link establishment or B beign |
| 496 | * restarted. |
| 497 | */ |
| 498 | event = CLS_ACPT; |
| 499 | else if (sta->plid != plid) |
| 500 | event = CLS_IGNR; |
| 501 | else if (ie_len == 7 && sta->llid != llid) |
| 502 | event = CLS_IGNR; |
| 503 | else |
| 504 | event = CLS_ACPT; |
| 505 | break; |
| 506 | default: |
| 507 | mpl_dbg("Mesh plink: unknown frame subtype\n"); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 508 | spin_unlock_bh(&sta->lock); |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 509 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 510 | return; |
| 511 | } |
| 512 | } |
| 513 | |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 514 | mpl_dbg("Mesh plink (peer, state, llid, plid, event): %pM %d %d %d %d\n", |
| 515 | mgmt->sa, sta->plink_state, |
| 516 | le16_to_cpu(sta->llid), le16_to_cpu(sta->plid), |
| 517 | event); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 518 | reason = 0; |
| 519 | switch (sta->plink_state) { |
| 520 | /* spin_unlock as soon as state is updated at each case */ |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 521 | case PLINK_LISTEN: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 522 | switch (event) { |
| 523 | case CLS_ACPT: |
| 524 | mesh_plink_fsm_restart(sta); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 525 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 526 | break; |
| 527 | case OPN_ACPT: |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 528 | sta->plink_state = PLINK_OPN_RCVD; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 529 | sta->plid = plid; |
| 530 | get_random_bytes(&llid, 2); |
| 531 | sta->llid = llid; |
| 532 | mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 533 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 534 | mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 535 | 0, 0); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 536 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 537 | llid, plid, 0); |
| 538 | break; |
| 539 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 540 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 541 | break; |
| 542 | } |
| 543 | break; |
| 544 | |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 545 | case PLINK_OPN_SNT: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 546 | switch (event) { |
| 547 | case OPN_RJCT: |
| 548 | case CNF_RJCT: |
| 549 | reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); |
| 550 | case CLS_ACPT: |
| 551 | if (!reason) |
| 552 | reason = cpu_to_le16(MESH_CLOSE_RCVD); |
| 553 | sta->reason = reason; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 554 | sta->plink_state = PLINK_HOLDING; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 555 | if (!mod_plink_timer(sta, |
| 556 | dot11MeshHoldingTimeout(sdata))) |
| 557 | sta->ignore_plink_timer = true; |
| 558 | |
| 559 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 560 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 561 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 562 | plid, reason); |
| 563 | break; |
| 564 | case OPN_ACPT: |
| 565 | /* retry timer is left untouched */ |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 566 | sta->plink_state = PLINK_OPN_RCVD; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 567 | sta->plid = plid; |
| 568 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 569 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 570 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 571 | plid, 0); |
| 572 | break; |
| 573 | case CNF_ACPT: |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 574 | sta->plink_state = PLINK_CNF_RCVD; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 575 | if (!mod_plink_timer(sta, |
| 576 | dot11MeshConfirmTimeout(sdata))) |
| 577 | sta->ignore_plink_timer = true; |
| 578 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 579 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 580 | break; |
| 581 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 582 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 583 | break; |
| 584 | } |
| 585 | break; |
| 586 | |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 587 | case PLINK_OPN_RCVD: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 588 | switch (event) { |
| 589 | case OPN_RJCT: |
| 590 | case CNF_RJCT: |
| 591 | reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); |
| 592 | case CLS_ACPT: |
| 593 | if (!reason) |
| 594 | reason = cpu_to_le16(MESH_CLOSE_RCVD); |
| 595 | sta->reason = reason; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 596 | sta->plink_state = PLINK_HOLDING; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 597 | if (!mod_plink_timer(sta, |
| 598 | dot11MeshHoldingTimeout(sdata))) |
| 599 | sta->ignore_plink_timer = true; |
| 600 | |
| 601 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 602 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 603 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 604 | plid, reason); |
| 605 | break; |
| 606 | case OPN_ACPT: |
| 607 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 608 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 609 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 610 | plid, 0); |
| 611 | break; |
| 612 | case CNF_ACPT: |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 613 | del_timer(&sta->plink_timer); |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 614 | sta->plink_state = PLINK_ESTAB; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 615 | mesh_plink_inc_estab_count(sdata); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 616 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 617 | mpl_dbg("Mesh plink with %pM ESTABLISHED\n", |
| 618 | sta->sta.addr); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 619 | break; |
| 620 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 621 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 622 | break; |
| 623 | } |
| 624 | break; |
| 625 | |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 626 | case PLINK_CNF_RCVD: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 627 | switch (event) { |
| 628 | case OPN_RJCT: |
| 629 | case CNF_RJCT: |
| 630 | reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); |
| 631 | case CLS_ACPT: |
| 632 | if (!reason) |
| 633 | reason = cpu_to_le16(MESH_CLOSE_RCVD); |
| 634 | sta->reason = reason; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 635 | sta->plink_state = PLINK_HOLDING; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 636 | if (!mod_plink_timer(sta, |
| 637 | dot11MeshHoldingTimeout(sdata))) |
| 638 | sta->ignore_plink_timer = true; |
| 639 | |
| 640 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 641 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 642 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 643 | plid, reason); |
Johannes Berg | ff59dc7 | 2008-02-25 10:11:50 +0100 | [diff] [blame] | 644 | break; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 645 | case OPN_ACPT: |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 646 | del_timer(&sta->plink_timer); |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 647 | sta->plink_state = PLINK_ESTAB; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 648 | mesh_plink_inc_estab_count(sdata); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 649 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 650 | mpl_dbg("Mesh plink with %pM ESTABLISHED\n", |
| 651 | sta->sta.addr); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 652 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 653 | plid, 0); |
| 654 | break; |
| 655 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 656 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 657 | break; |
| 658 | } |
| 659 | break; |
| 660 | |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 661 | case PLINK_ESTAB: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 662 | switch (event) { |
| 663 | case CLS_ACPT: |
| 664 | reason = cpu_to_le16(MESH_CLOSE_RCVD); |
| 665 | sta->reason = reason; |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 666 | __mesh_plink_deactivate(sta); |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 667 | sta->plink_state = PLINK_HOLDING; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 668 | llid = sta->llid; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 669 | mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 670 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 671 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 672 | plid, reason); |
| 673 | break; |
| 674 | case OPN_ACPT: |
| 675 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 676 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 677 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 678 | plid, 0); |
| 679 | break; |
| 680 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 681 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 682 | break; |
| 683 | } |
| 684 | break; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 685 | case PLINK_HOLDING: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 686 | switch (event) { |
| 687 | case CLS_ACPT: |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 688 | if (del_timer(&sta->plink_timer)) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 689 | sta->ignore_plink_timer = 1; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 690 | mesh_plink_fsm_restart(sta); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 691 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 692 | break; |
| 693 | case OPN_ACPT: |
| 694 | case CNF_ACPT: |
| 695 | case OPN_RJCT: |
| 696 | case CNF_RJCT: |
| 697 | llid = sta->llid; |
| 698 | reason = sta->reason; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 699 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 700 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, |
| 701 | llid, plid, reason); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 702 | break; |
| 703 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 704 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 705 | } |
| 706 | break; |
| 707 | default: |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 708 | /* should not get here, PLINK_BLOCKED is dealt with at the |
| 709 | * beggining of the function |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 710 | */ |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 711 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 712 | break; |
| 713 | } |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 714 | |
| 715 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 716 | } |