Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 1 | /* |
Rui Paulo | 264d9b7 | 2009-11-09 23:46:58 +0000 | [diff] [blame] | 2 | * Copyright (c) 2008, 2009 open80211s Ltd. |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 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 | */ |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 9 | #include <linux/gfp.h> |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 10 | #include <linux/kernel.h> |
| 11 | #include <linux/random.h> |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 12 | #include "ieee80211_i.h" |
Johannes Berg | 2c8dccc | 2008-04-08 15:14:40 -0400 | [diff] [blame] | 13 | #include "rate.h" |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 14 | #include "mesh.h" |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 15 | |
| 16 | #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG |
| 17 | #define mpl_dbg(fmt, args...) printk(KERN_DEBUG fmt, ##args) |
| 18 | #else |
| 19 | #define mpl_dbg(fmt, args...) do { (void)(0); } while (0) |
| 20 | #endif |
| 21 | |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 22 | #define PLINK_GET_LLID(p) (p + 4) |
| 23 | #define PLINK_GET_PLID(p) (p + 6) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 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 | * |
Rui Paulo | 23c7a29 | 2009-11-09 23:46:42 +0000 | [diff] [blame] | 80 | * @sta: mesh peer link to restart |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 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 | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 104 | sta = sta_info_alloc(sdata, hw_addr, GFP_KERNEL); |
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 | /** |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [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 | */ |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 124 | static bool __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; |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 127 | bool deactivated = false; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 128 | |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 129 | if (sta->plink_state == PLINK_ESTAB) { |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 130 | mesh_plink_dec_estab_count(sdata); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 131 | deactivated = true; |
| 132 | } |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 133 | sta->plink_state = PLINK_BLOCKED; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 134 | mesh_path_flush_by_nexthop(sta); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 135 | |
| 136 | return deactivated; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 137 | } |
| 138 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 139 | /** |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 140 | * mesh_plink_deactivate - deactivate mesh peer link |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 141 | * |
| 142 | * @sta: mesh peer link to deactivate |
| 143 | * |
| 144 | * All mesh paths with this peer as next hop will be flushed |
| 145 | */ |
| 146 | void mesh_plink_deactivate(struct sta_info *sta) |
| 147 | { |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 148 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 149 | bool deactivated; |
| 150 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 151 | spin_lock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 152 | deactivated = __mesh_plink_deactivate(sta); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 153 | spin_unlock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 154 | |
| 155 | if (deactivated) |
| 156 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 157 | } |
| 158 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 159 | 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] | 160 | enum plink_frame_type action, u8 *da, __le16 llid, __le16 plid, |
| 161 | __le16 reason) { |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 162 | struct ieee80211_local *local = sdata->local; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 163 | struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); |
| 164 | struct ieee80211_mgmt *mgmt; |
| 165 | bool include_plid = false; |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 166 | static const u8 meshpeeringproto[] = { 0x00, 0x0F, 0xAC, 0x2A }; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 167 | u8 *pos; |
| 168 | int ie_len; |
| 169 | |
| 170 | if (!skb) |
| 171 | return -1; |
| 172 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 173 | /* 25 is the size of the common mgmt part (24) plus the size of the |
| 174 | * common action part (1) |
| 175 | */ |
| 176 | mgmt = (struct ieee80211_mgmt *) |
| 177 | skb_put(skb, 25 + sizeof(mgmt->u.action.u.plink_action)); |
| 178 | memset(mgmt, 0, 25 + sizeof(mgmt->u.action.u.plink_action)); |
Harvey Harrison | e7827a7 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 179 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 180 | IEEE80211_STYPE_ACTION); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 181 | memcpy(mgmt->da, da, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 182 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 183 | /* BSSID is left zeroed, wildcard value */ |
Javier Cardona | 97ad913 | 2010-03-29 11:00:21 -0700 | [diff] [blame] | 184 | mgmt->u.action.category = WLAN_CATEGORY_MESH_PLINK; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 185 | mgmt->u.action.u.plink_action.action_code = action; |
| 186 | |
| 187 | if (action == PLINK_CLOSE) |
| 188 | mgmt->u.action.u.plink_action.aux = reason; |
| 189 | else { |
| 190 | mgmt->u.action.u.plink_action.aux = cpu_to_le16(0x0); |
| 191 | if (action == PLINK_CONFIRM) { |
| 192 | pos = skb_put(skb, 4); |
| 193 | /* two-byte status code followed by two-byte AID */ |
Rui Paulo | 77fa76b | 2009-11-09 23:46:52 +0000 | [diff] [blame] | 194 | memset(pos, 0, 2); |
| 195 | memcpy(pos + 2, &plid, 2); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 196 | } |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 197 | mesh_mgmt_ies_add(skb, sdata); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | /* Add Peer Link Management element */ |
| 201 | switch (action) { |
| 202 | case PLINK_OPEN: |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 203 | ie_len = 6; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 204 | break; |
| 205 | case PLINK_CONFIRM: |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 206 | ie_len = 8; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 207 | include_plid = true; |
| 208 | break; |
| 209 | case PLINK_CLOSE: |
| 210 | default: |
| 211 | if (!plid) |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 212 | ie_len = 8; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 213 | else { |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 214 | ie_len = 10; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 215 | include_plid = true; |
| 216 | } |
| 217 | break; |
| 218 | } |
| 219 | |
| 220 | pos = skb_put(skb, 2 + ie_len); |
| 221 | *pos++ = WLAN_EID_PEER_LINK; |
| 222 | *pos++ = ie_len; |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 223 | memcpy(pos, meshpeeringproto, sizeof(meshpeeringproto)); |
| 224 | pos += 4; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 225 | memcpy(pos, &llid, 2); |
| 226 | if (include_plid) { |
| 227 | pos += 2; |
| 228 | memcpy(pos, &plid, 2); |
| 229 | } |
| 230 | if (action == PLINK_CLOSE) { |
| 231 | pos += 2; |
| 232 | memcpy(pos, &reason, 2); |
| 233 | } |
| 234 | |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 235 | ieee80211_tx_skb(sdata, skb); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 236 | return 0; |
| 237 | } |
| 238 | |
Johannes Berg | 881d948 | 2009-01-21 15:13:48 +0100 | [diff] [blame] | 239 | 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] | 240 | bool peer_accepting_plinks) |
| 241 | { |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 242 | struct ieee80211_local *local = sdata->local; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 243 | struct sta_info *sta; |
| 244 | |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 245 | rcu_read_lock(); |
| 246 | |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 247 | sta = sta_info_get(sdata, hw_addr); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 248 | if (!sta) { |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 249 | rcu_read_unlock(); |
| 250 | |
Johannes Berg | 03e4497 | 2008-02-27 09:56:40 +0100 | [diff] [blame] | 251 | sta = mesh_plink_alloc(sdata, hw_addr, rates); |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 252 | if (!sta) |
Johannes Berg | 73651ee | 2008-02-25 16:27:47 +0100 | [diff] [blame] | 253 | return; |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 254 | if (sta_info_insert_rcu(sta)) { |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 255 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 256 | return; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 257 | } |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | sta->last_rx = jiffies; |
Johannes Berg | 323ce79 | 2008-09-11 02:45:11 +0200 | [diff] [blame] | 261 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 262 | if (peer_accepting_plinks && sta->plink_state == PLINK_LISTEN && |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 263 | sdata->u.mesh.accepting_plinks && |
| 264 | sdata->u.mesh.mshcfg.auto_open_plinks) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 265 | mesh_plink_open(sta); |
| 266 | |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 267 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | static void mesh_plink_timer(unsigned long data) |
| 271 | { |
| 272 | struct sta_info *sta; |
| 273 | __le16 llid, plid, reason; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 274 | struct ieee80211_sub_if_data *sdata; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 275 | |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 276 | /* |
| 277 | * This STA is valid because sta_info_destroy() will |
| 278 | * del_timer_sync() this timer after having made sure |
| 279 | * it cannot be readded (by deleting the plink.) |
| 280 | */ |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 281 | sta = (struct sta_info *) data; |
| 282 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 283 | if (sta->sdata->local->quiescing) { |
| 284 | sta->plink_timer_was_running = true; |
| 285 | return; |
| 286 | } |
| 287 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 288 | spin_lock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 289 | if (sta->ignore_plink_timer) { |
| 290 | sta->ignore_plink_timer = false; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 291 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 292 | return; |
| 293 | } |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 294 | mpl_dbg("Mesh plink timer for %pM fired on state %d\n", |
| 295 | sta->sta.addr, sta->plink_state); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 296 | reason = 0; |
| 297 | llid = sta->llid; |
| 298 | plid = sta->plid; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 299 | sdata = sta->sdata; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 300 | |
| 301 | switch (sta->plink_state) { |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 302 | case PLINK_OPN_RCVD: |
| 303 | case PLINK_OPN_SNT: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 304 | /* retry timer */ |
| 305 | if (sta->plink_retries < dot11MeshMaxRetries(sdata)) { |
| 306 | u32 rand; |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 307 | mpl_dbg("Mesh plink for %pM (retry, timeout): %d %d\n", |
| 308 | sta->sta.addr, sta->plink_retries, |
| 309 | sta->plink_timeout); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 310 | get_random_bytes(&rand, sizeof(u32)); |
| 311 | sta->plink_timeout = sta->plink_timeout + |
| 312 | rand % sta->plink_timeout; |
| 313 | ++sta->plink_retries; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 314 | mod_plink_timer(sta, sta->plink_timeout); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 315 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 316 | mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 317 | 0, 0); |
| 318 | break; |
| 319 | } |
| 320 | reason = cpu_to_le16(MESH_MAX_RETRIES); |
| 321 | /* fall through on else */ |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 322 | case PLINK_CNF_RCVD: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 323 | /* confirm timer */ |
| 324 | if (!reason) |
| 325 | reason = cpu_to_le16(MESH_CONFIRM_TIMEOUT); |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 326 | sta->plink_state = PLINK_HOLDING; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 327 | mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 328 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 329 | 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] | 330 | reason); |
| 331 | break; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 332 | case PLINK_HOLDING: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 333 | /* holding timer */ |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 334 | del_timer(&sta->plink_timer); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 335 | mesh_plink_fsm_restart(sta); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 336 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 337 | break; |
| 338 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 339 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 340 | break; |
| 341 | } |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 342 | } |
| 343 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 344 | #ifdef CONFIG_PM |
| 345 | void mesh_plink_quiesce(struct sta_info *sta) |
| 346 | { |
| 347 | if (del_timer_sync(&sta->plink_timer)) |
| 348 | sta->plink_timer_was_running = true; |
| 349 | } |
| 350 | |
| 351 | void mesh_plink_restart(struct sta_info *sta) |
| 352 | { |
| 353 | if (sta->plink_timer_was_running) { |
| 354 | add_timer(&sta->plink_timer); |
| 355 | sta->plink_timer_was_running = false; |
| 356 | } |
| 357 | } |
| 358 | #endif |
| 359 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 360 | static inline void mesh_plink_timer_set(struct sta_info *sta, int timeout) |
| 361 | { |
| 362 | sta->plink_timer.expires = jiffies + (HZ * timeout / 1000); |
| 363 | sta->plink_timer.data = (unsigned long) sta; |
| 364 | sta->plink_timer.function = mesh_plink_timer; |
| 365 | sta->plink_timeout = timeout; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 366 | add_timer(&sta->plink_timer); |
| 367 | } |
| 368 | |
| 369 | int mesh_plink_open(struct sta_info *sta) |
| 370 | { |
| 371 | __le16 llid; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 372 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 373 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 374 | spin_lock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 375 | get_random_bytes(&llid, 2); |
| 376 | sta->llid = llid; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 377 | if (sta->plink_state != PLINK_LISTEN) { |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 378 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 379 | return -EBUSY; |
| 380 | } |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 381 | sta->plink_state = PLINK_OPN_SNT; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 382 | mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 383 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 384 | mpl_dbg("Mesh plink: starting establishment with %pM\n", |
| 385 | sta->sta.addr); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 386 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 387 | return mesh_plink_frame_tx(sdata, PLINK_OPEN, |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 388 | sta->sta.addr, llid, 0, 0); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 389 | } |
| 390 | |
| 391 | void mesh_plink_block(struct sta_info *sta) |
| 392 | { |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 393 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 394 | bool deactivated; |
| 395 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 396 | spin_lock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 397 | deactivated = __mesh_plink_deactivate(sta); |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 398 | sta->plink_state = PLINK_BLOCKED; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 399 | spin_unlock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 400 | |
| 401 | if (deactivated) |
| 402 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 403 | } |
| 404 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 405 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 406 | 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] | 407 | size_t len, struct ieee80211_rx_status *rx_status) |
| 408 | { |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 409 | struct ieee80211_local *local = sdata->local; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 410 | struct ieee802_11_elems elems; |
| 411 | struct sta_info *sta; |
| 412 | enum plink_event event; |
| 413 | enum plink_frame_type ftype; |
| 414 | size_t baselen; |
Christian Lamparter | d12c745 | 2010-10-08 22:27:07 +0200 | [diff] [blame] | 415 | bool deactivated, matches_local = true; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 416 | u8 ie_len; |
| 417 | u8 *baseaddr; |
| 418 | __le16 plid, llid, reason; |
Rui Paulo | 1460dd1 | 2009-11-09 23:46:48 +0000 | [diff] [blame] | 419 | #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG |
| 420 | static const char *mplstates[] = { |
| 421 | [PLINK_LISTEN] = "LISTEN", |
| 422 | [PLINK_OPN_SNT] = "OPN-SNT", |
| 423 | [PLINK_OPN_RCVD] = "OPN-RCVD", |
| 424 | [PLINK_CNF_RCVD] = "CNF_RCVD", |
| 425 | [PLINK_ESTAB] = "ESTAB", |
| 426 | [PLINK_HOLDING] = "HOLDING", |
| 427 | [PLINK_BLOCKED] = "BLOCKED" |
| 428 | }; |
| 429 | #endif |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 430 | |
Johannes Berg | 9c80d3d | 2008-09-08 15:41:59 +0200 | [diff] [blame] | 431 | /* need action_code, aux */ |
| 432 | if (len < IEEE80211_MIN_ACTION_SIZE + 3) |
| 433 | return; |
| 434 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 435 | if (is_multicast_ether_addr(mgmt->da)) { |
| 436 | mpl_dbg("Mesh plink: ignore frame from multicast address"); |
| 437 | return; |
| 438 | } |
| 439 | |
| 440 | baseaddr = mgmt->u.action.u.plink_action.variable; |
| 441 | baselen = (u8 *) mgmt->u.action.u.plink_action.variable - (u8 *) mgmt; |
| 442 | if (mgmt->u.action.u.plink_action.action_code == PLINK_CONFIRM) { |
| 443 | baseaddr += 4; |
David Woo | 70bdb6b | 2009-08-12 11:03:44 -0700 | [diff] [blame] | 444 | baselen += 4; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 445 | } |
| 446 | ieee802_11_parse_elems(baseaddr, len - baselen, &elems); |
| 447 | if (!elems.peer_link) { |
| 448 | mpl_dbg("Mesh plink: missing necessary peer link ie\n"); |
| 449 | return; |
| 450 | } |
| 451 | |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 452 | ftype = mgmt->u.action.u.plink_action.action_code; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 453 | ie_len = elems.peer_link_len; |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 454 | if ((ftype == PLINK_OPEN && ie_len != 6) || |
| 455 | (ftype == PLINK_CONFIRM && ie_len != 8) || |
| 456 | (ftype == PLINK_CLOSE && ie_len != 8 && ie_len != 10)) { |
| 457 | mpl_dbg("Mesh plink: incorrect plink ie length %d %d\n", |
| 458 | ftype, ie_len); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 459 | return; |
| 460 | } |
| 461 | |
| 462 | if (ftype != PLINK_CLOSE && (!elems.mesh_id || !elems.mesh_config)) { |
| 463 | mpl_dbg("Mesh plink: missing necessary ie\n"); |
| 464 | return; |
| 465 | } |
| 466 | /* Note the lines below are correct, the llid in the frame is the plid |
| 467 | * from the point of view of this host. |
| 468 | */ |
| 469 | memcpy(&plid, PLINK_GET_LLID(elems.peer_link), 2); |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 470 | if (ftype == PLINK_CONFIRM || (ftype == PLINK_CLOSE && ie_len == 10)) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 471 | memcpy(&llid, PLINK_GET_PLID(elems.peer_link), 2); |
| 472 | |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 473 | rcu_read_lock(); |
| 474 | |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 475 | sta = sta_info_get(sdata, mgmt->sa); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 476 | if (!sta && ftype != PLINK_OPEN) { |
| 477 | mpl_dbg("Mesh plink: cls or cnf from unknown peer\n"); |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 478 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 479 | return; |
| 480 | } |
| 481 | |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 482 | if (sta && sta->plink_state == PLINK_BLOCKED) { |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 483 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 484 | return; |
| 485 | } |
| 486 | |
| 487 | /* Now we will figure out the appropriate event... */ |
| 488 | event = PLINK_UNDEFINED; |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 489 | if (ftype != PLINK_CLOSE && (!mesh_matches_local(&elems, sdata))) { |
Christian Lamparter | d12c745 | 2010-10-08 22:27:07 +0200 | [diff] [blame] | 490 | matches_local = false; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 491 | switch (ftype) { |
| 492 | case PLINK_OPEN: |
| 493 | event = OPN_RJCT; |
| 494 | break; |
| 495 | case PLINK_CONFIRM: |
| 496 | event = CNF_RJCT; |
| 497 | break; |
| 498 | case PLINK_CLOSE: |
| 499 | /* avoid warning */ |
| 500 | break; |
| 501 | } |
Christian Lamparter | d12c745 | 2010-10-08 22:27:07 +0200 | [diff] [blame] | 502 | } |
| 503 | |
| 504 | if (!sta && !matches_local) { |
| 505 | rcu_read_unlock(); |
| 506 | reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); |
| 507 | llid = 0; |
| 508 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, mgmt->sa, llid, |
| 509 | plid, reason); |
| 510 | return; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 511 | } else if (!sta) { |
| 512 | /* ftype == PLINK_OPEN */ |
Johannes Berg | 881d948 | 2009-01-21 15:13:48 +0100 | [diff] [blame] | 513 | u32 rates; |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 514 | |
| 515 | rcu_read_unlock(); |
| 516 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 517 | if (!mesh_plink_free_count(sdata)) { |
| 518 | mpl_dbg("Mesh plink error: no more free plinks\n"); |
| 519 | return; |
| 520 | } |
| 521 | |
| 522 | rates = ieee80211_sta_get_rates(local, &elems, rx_status->band); |
Johannes Berg | 03e4497 | 2008-02-27 09:56:40 +0100 | [diff] [blame] | 523 | sta = mesh_plink_alloc(sdata, mgmt->sa, rates); |
Johannes Berg | 73651ee | 2008-02-25 16:27:47 +0100 | [diff] [blame] | 524 | if (!sta) { |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 525 | mpl_dbg("Mesh plink error: plink table full\n"); |
| 526 | return; |
| 527 | } |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 528 | if (sta_info_insert_rcu(sta)) { |
Johannes Berg | 73651ee | 2008-02-25 16:27:47 +0100 | [diff] [blame] | 529 | rcu_read_unlock(); |
| 530 | return; |
| 531 | } |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 532 | event = OPN_ACPT; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 533 | spin_lock_bh(&sta->lock); |
Christian Lamparter | d12c745 | 2010-10-08 22:27:07 +0200 | [diff] [blame] | 534 | } else if (matches_local) { |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 535 | spin_lock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 536 | switch (ftype) { |
| 537 | case PLINK_OPEN: |
| 538 | if (!mesh_plink_free_count(sdata) || |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 539 | (sta->plid && sta->plid != plid)) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 540 | event = OPN_IGNR; |
| 541 | else |
| 542 | event = OPN_ACPT; |
| 543 | break; |
| 544 | case PLINK_CONFIRM: |
| 545 | if (!mesh_plink_free_count(sdata) || |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 546 | (sta->llid != llid || sta->plid != plid)) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 547 | event = CNF_IGNR; |
| 548 | else |
| 549 | event = CNF_ACPT; |
| 550 | break; |
| 551 | case PLINK_CLOSE: |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 552 | if (sta->plink_state == PLINK_ESTAB) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 553 | /* Do not check for llid or plid. This does not |
| 554 | * follow the standard but since multiple plinks |
| 555 | * per sta are not supported, it is necessary in |
| 556 | * order to avoid a livelock when MP A sees an |
| 557 | * establish peer link to MP B but MP B does not |
| 558 | * see it. This can be caused by a timeout in |
| 559 | * B's peer link establishment or B beign |
| 560 | * restarted. |
| 561 | */ |
| 562 | event = CLS_ACPT; |
| 563 | else if (sta->plid != plid) |
| 564 | event = CLS_IGNR; |
| 565 | else if (ie_len == 7 && sta->llid != llid) |
| 566 | event = CLS_IGNR; |
| 567 | else |
| 568 | event = CLS_ACPT; |
| 569 | break; |
| 570 | default: |
| 571 | mpl_dbg("Mesh plink: unknown frame subtype\n"); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 572 | spin_unlock_bh(&sta->lock); |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 573 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 574 | return; |
| 575 | } |
Christian Lamparter | d12c745 | 2010-10-08 22:27:07 +0200 | [diff] [blame] | 576 | } else { |
| 577 | spin_lock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 578 | } |
| 579 | |
Rui Paulo | 1460dd1 | 2009-11-09 23:46:48 +0000 | [diff] [blame] | 580 | mpl_dbg("Mesh plink (peer, state, llid, plid, event): %pM %s %d %d %d\n", |
| 581 | mgmt->sa, mplstates[sta->plink_state], |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 582 | le16_to_cpu(sta->llid), le16_to_cpu(sta->plid), |
| 583 | event); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 584 | reason = 0; |
| 585 | switch (sta->plink_state) { |
| 586 | /* spin_unlock as soon as state is updated at each case */ |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 587 | case PLINK_LISTEN: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 588 | switch (event) { |
| 589 | case CLS_ACPT: |
| 590 | mesh_plink_fsm_restart(sta); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 591 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 592 | break; |
| 593 | case OPN_ACPT: |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 594 | sta->plink_state = PLINK_OPN_RCVD; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 595 | sta->plid = plid; |
| 596 | get_random_bytes(&llid, 2); |
| 597 | sta->llid = llid; |
| 598 | mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 599 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 600 | mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 601 | 0, 0); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 602 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 603 | llid, plid, 0); |
| 604 | break; |
| 605 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 606 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 607 | break; |
| 608 | } |
| 609 | break; |
| 610 | |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 611 | case PLINK_OPN_SNT: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 612 | switch (event) { |
| 613 | case OPN_RJCT: |
| 614 | case CNF_RJCT: |
| 615 | reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); |
| 616 | case CLS_ACPT: |
| 617 | if (!reason) |
| 618 | reason = cpu_to_le16(MESH_CLOSE_RCVD); |
| 619 | sta->reason = reason; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 620 | sta->plink_state = PLINK_HOLDING; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 621 | if (!mod_plink_timer(sta, |
| 622 | dot11MeshHoldingTimeout(sdata))) |
| 623 | sta->ignore_plink_timer = true; |
| 624 | |
| 625 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 626 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 627 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 628 | plid, reason); |
| 629 | break; |
| 630 | case OPN_ACPT: |
| 631 | /* retry timer is left untouched */ |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 632 | sta->plink_state = PLINK_OPN_RCVD; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 633 | sta->plid = plid; |
| 634 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 635 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 636 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 637 | plid, 0); |
| 638 | break; |
| 639 | case CNF_ACPT: |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 640 | sta->plink_state = PLINK_CNF_RCVD; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 641 | if (!mod_plink_timer(sta, |
| 642 | dot11MeshConfirmTimeout(sdata))) |
| 643 | sta->ignore_plink_timer = true; |
| 644 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 645 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 646 | break; |
| 647 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 648 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 649 | break; |
| 650 | } |
| 651 | break; |
| 652 | |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 653 | case PLINK_OPN_RCVD: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 654 | switch (event) { |
| 655 | case OPN_RJCT: |
| 656 | case CNF_RJCT: |
| 657 | reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); |
| 658 | case CLS_ACPT: |
| 659 | if (!reason) |
| 660 | reason = cpu_to_le16(MESH_CLOSE_RCVD); |
| 661 | sta->reason = reason; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 662 | sta->plink_state = PLINK_HOLDING; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 663 | if (!mod_plink_timer(sta, |
| 664 | dot11MeshHoldingTimeout(sdata))) |
| 665 | sta->ignore_plink_timer = true; |
| 666 | |
| 667 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 668 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 669 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 670 | plid, reason); |
| 671 | break; |
| 672 | case OPN_ACPT: |
| 673 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 674 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 675 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 676 | plid, 0); |
| 677 | break; |
| 678 | case CNF_ACPT: |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 679 | del_timer(&sta->plink_timer); |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 680 | sta->plink_state = PLINK_ESTAB; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 681 | spin_unlock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 682 | mesh_plink_inc_estab_count(sdata); |
| 683 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 684 | mpl_dbg("Mesh plink with %pM ESTABLISHED\n", |
| 685 | sta->sta.addr); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 686 | break; |
| 687 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 688 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 689 | break; |
| 690 | } |
| 691 | break; |
| 692 | |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 693 | case PLINK_CNF_RCVD: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 694 | switch (event) { |
| 695 | case OPN_RJCT: |
| 696 | case CNF_RJCT: |
| 697 | reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); |
| 698 | case CLS_ACPT: |
| 699 | if (!reason) |
| 700 | reason = cpu_to_le16(MESH_CLOSE_RCVD); |
| 701 | sta->reason = reason; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 702 | sta->plink_state = PLINK_HOLDING; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 703 | if (!mod_plink_timer(sta, |
| 704 | dot11MeshHoldingTimeout(sdata))) |
| 705 | sta->ignore_plink_timer = true; |
| 706 | |
| 707 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 708 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 709 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 710 | plid, reason); |
Johannes Berg | ff59dc7 | 2008-02-25 10:11:50 +0100 | [diff] [blame] | 711 | break; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 712 | case OPN_ACPT: |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 713 | del_timer(&sta->plink_timer); |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 714 | sta->plink_state = PLINK_ESTAB; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 715 | spin_unlock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 716 | mesh_plink_inc_estab_count(sdata); |
| 717 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 718 | mpl_dbg("Mesh plink with %pM ESTABLISHED\n", |
| 719 | sta->sta.addr); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 720 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 721 | plid, 0); |
| 722 | break; |
| 723 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 724 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 725 | break; |
| 726 | } |
| 727 | break; |
| 728 | |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 729 | case PLINK_ESTAB: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 730 | switch (event) { |
| 731 | case CLS_ACPT: |
| 732 | reason = cpu_to_le16(MESH_CLOSE_RCVD); |
| 733 | sta->reason = reason; |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 734 | deactivated = __mesh_plink_deactivate(sta); |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 735 | sta->plink_state = PLINK_HOLDING; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 736 | llid = sta->llid; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 737 | mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 738 | spin_unlock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 739 | if (deactivated) |
| 740 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 741 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 742 | plid, reason); |
| 743 | break; |
| 744 | case OPN_ACPT: |
| 745 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 746 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 747 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 748 | plid, 0); |
| 749 | break; |
| 750 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 751 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 752 | break; |
| 753 | } |
| 754 | break; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 755 | case PLINK_HOLDING: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 756 | switch (event) { |
| 757 | case CLS_ACPT: |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 758 | if (del_timer(&sta->plink_timer)) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 759 | sta->ignore_plink_timer = 1; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 760 | mesh_plink_fsm_restart(sta); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 761 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 762 | break; |
| 763 | case OPN_ACPT: |
| 764 | case CNF_ACPT: |
| 765 | case OPN_RJCT: |
| 766 | case CNF_RJCT: |
| 767 | llid = sta->llid; |
| 768 | reason = sta->reason; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 769 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 770 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, |
| 771 | llid, plid, reason); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 772 | break; |
| 773 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 774 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 775 | } |
| 776 | break; |
| 777 | default: |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 778 | /* should not get here, PLINK_BLOCKED is dealt with at the |
Daniel Mack | 3ad2f3f | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 779 | * beginning of the function |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 780 | */ |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 781 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 782 | break; |
| 783 | } |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 784 | |
| 785 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 786 | } |