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; |
Javier Cardona | c80d545 | 2010-12-16 17:37:49 -0800 | [diff] [blame^] | 163 | struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400 + |
| 164 | sdata->u.mesh.vendor_ie_len); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 165 | struct ieee80211_mgmt *mgmt; |
| 166 | bool include_plid = false; |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 167 | static const u8 meshpeeringproto[] = { 0x00, 0x0F, 0xAC, 0x2A }; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 168 | u8 *pos; |
| 169 | int ie_len; |
| 170 | |
| 171 | if (!skb) |
| 172 | return -1; |
| 173 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 174 | /* 25 is the size of the common mgmt part (24) plus the size of the |
| 175 | * common action part (1) |
| 176 | */ |
| 177 | mgmt = (struct ieee80211_mgmt *) |
| 178 | skb_put(skb, 25 + sizeof(mgmt->u.action.u.plink_action)); |
| 179 | memset(mgmt, 0, 25 + sizeof(mgmt->u.action.u.plink_action)); |
Harvey Harrison | e7827a7 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 180 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 181 | IEEE80211_STYPE_ACTION); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 182 | memcpy(mgmt->da, da, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 183 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 184 | /* BSSID is left zeroed, wildcard value */ |
Javier Cardona | 97ad913 | 2010-03-29 11:00:21 -0700 | [diff] [blame] | 185 | mgmt->u.action.category = WLAN_CATEGORY_MESH_PLINK; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 186 | mgmt->u.action.u.plink_action.action_code = action; |
| 187 | |
| 188 | if (action == PLINK_CLOSE) |
| 189 | mgmt->u.action.u.plink_action.aux = reason; |
| 190 | else { |
| 191 | mgmt->u.action.u.plink_action.aux = cpu_to_le16(0x0); |
| 192 | if (action == PLINK_CONFIRM) { |
| 193 | pos = skb_put(skb, 4); |
| 194 | /* two-byte status code followed by two-byte AID */ |
Rui Paulo | 77fa76b | 2009-11-09 23:46:52 +0000 | [diff] [blame] | 195 | memset(pos, 0, 2); |
| 196 | memcpy(pos + 2, &plid, 2); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 197 | } |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 198 | mesh_mgmt_ies_add(skb, sdata); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 199 | } |
| 200 | |
| 201 | /* Add Peer Link Management element */ |
| 202 | switch (action) { |
| 203 | case PLINK_OPEN: |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 204 | ie_len = 6; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 205 | break; |
| 206 | case PLINK_CONFIRM: |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 207 | ie_len = 8; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 208 | include_plid = true; |
| 209 | break; |
| 210 | case PLINK_CLOSE: |
| 211 | default: |
| 212 | if (!plid) |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 213 | ie_len = 8; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 214 | else { |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 215 | ie_len = 10; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 216 | include_plid = true; |
| 217 | } |
| 218 | break; |
| 219 | } |
| 220 | |
| 221 | pos = skb_put(skb, 2 + ie_len); |
| 222 | *pos++ = WLAN_EID_PEER_LINK; |
| 223 | *pos++ = ie_len; |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 224 | memcpy(pos, meshpeeringproto, sizeof(meshpeeringproto)); |
| 225 | pos += 4; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 226 | memcpy(pos, &llid, 2); |
| 227 | if (include_plid) { |
| 228 | pos += 2; |
| 229 | memcpy(pos, &plid, 2); |
| 230 | } |
| 231 | if (action == PLINK_CLOSE) { |
| 232 | pos += 2; |
| 233 | memcpy(pos, &reason, 2); |
| 234 | } |
| 235 | |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 236 | ieee80211_tx_skb(sdata, skb); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 237 | return 0; |
| 238 | } |
| 239 | |
Johannes Berg | 881d948 | 2009-01-21 15:13:48 +0100 | [diff] [blame] | 240 | 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] | 241 | bool peer_accepting_plinks) |
| 242 | { |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 243 | struct ieee80211_local *local = sdata->local; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 244 | struct sta_info *sta; |
| 245 | |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 246 | rcu_read_lock(); |
| 247 | |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 248 | sta = sta_info_get(sdata, hw_addr); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 249 | if (!sta) { |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 250 | rcu_read_unlock(); |
| 251 | |
Johannes Berg | 03e4497 | 2008-02-27 09:56:40 +0100 | [diff] [blame] | 252 | sta = mesh_plink_alloc(sdata, hw_addr, rates); |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 253 | if (!sta) |
Johannes Berg | 73651ee | 2008-02-25 16:27:47 +0100 | [diff] [blame] | 254 | return; |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 255 | if (sta_info_insert_rcu(sta)) { |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 256 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 257 | return; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 258 | } |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 259 | } |
| 260 | |
| 261 | sta->last_rx = jiffies; |
Johannes Berg | 323ce79 | 2008-09-11 02:45:11 +0200 | [diff] [blame] | 262 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 263 | if (peer_accepting_plinks && sta->plink_state == PLINK_LISTEN && |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 264 | sdata->u.mesh.accepting_plinks && |
| 265 | sdata->u.mesh.mshcfg.auto_open_plinks) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 266 | mesh_plink_open(sta); |
| 267 | |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 268 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 269 | } |
| 270 | |
| 271 | static void mesh_plink_timer(unsigned long data) |
| 272 | { |
| 273 | struct sta_info *sta; |
| 274 | __le16 llid, plid, reason; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 275 | struct ieee80211_sub_if_data *sdata; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 276 | |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 277 | /* |
| 278 | * This STA is valid because sta_info_destroy() will |
| 279 | * del_timer_sync() this timer after having made sure |
| 280 | * it cannot be readded (by deleting the plink.) |
| 281 | */ |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 282 | sta = (struct sta_info *) data; |
| 283 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 284 | if (sta->sdata->local->quiescing) { |
| 285 | sta->plink_timer_was_running = true; |
| 286 | return; |
| 287 | } |
| 288 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 289 | spin_lock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 290 | if (sta->ignore_plink_timer) { |
| 291 | sta->ignore_plink_timer = false; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 292 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 293 | return; |
| 294 | } |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 295 | mpl_dbg("Mesh plink timer for %pM fired on state %d\n", |
| 296 | sta->sta.addr, sta->plink_state); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 297 | reason = 0; |
| 298 | llid = sta->llid; |
| 299 | plid = sta->plid; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 300 | sdata = sta->sdata; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 301 | |
| 302 | switch (sta->plink_state) { |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 303 | case PLINK_OPN_RCVD: |
| 304 | case PLINK_OPN_SNT: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 305 | /* retry timer */ |
| 306 | if (sta->plink_retries < dot11MeshMaxRetries(sdata)) { |
| 307 | u32 rand; |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 308 | mpl_dbg("Mesh plink for %pM (retry, timeout): %d %d\n", |
| 309 | sta->sta.addr, sta->plink_retries, |
| 310 | sta->plink_timeout); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 311 | get_random_bytes(&rand, sizeof(u32)); |
| 312 | sta->plink_timeout = sta->plink_timeout + |
| 313 | rand % sta->plink_timeout; |
| 314 | ++sta->plink_retries; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 315 | mod_plink_timer(sta, sta->plink_timeout); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 316 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 317 | mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 318 | 0, 0); |
| 319 | break; |
| 320 | } |
| 321 | reason = cpu_to_le16(MESH_MAX_RETRIES); |
| 322 | /* fall through on else */ |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 323 | case PLINK_CNF_RCVD: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 324 | /* confirm timer */ |
| 325 | if (!reason) |
| 326 | reason = cpu_to_le16(MESH_CONFIRM_TIMEOUT); |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 327 | sta->plink_state = PLINK_HOLDING; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 328 | mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 329 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 330 | 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] | 331 | reason); |
| 332 | break; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 333 | case PLINK_HOLDING: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 334 | /* holding timer */ |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 335 | del_timer(&sta->plink_timer); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 336 | mesh_plink_fsm_restart(sta); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 337 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 338 | break; |
| 339 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 340 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 341 | break; |
| 342 | } |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 343 | } |
| 344 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 345 | #ifdef CONFIG_PM |
| 346 | void mesh_plink_quiesce(struct sta_info *sta) |
| 347 | { |
| 348 | if (del_timer_sync(&sta->plink_timer)) |
| 349 | sta->plink_timer_was_running = true; |
| 350 | } |
| 351 | |
| 352 | void mesh_plink_restart(struct sta_info *sta) |
| 353 | { |
| 354 | if (sta->plink_timer_was_running) { |
| 355 | add_timer(&sta->plink_timer); |
| 356 | sta->plink_timer_was_running = false; |
| 357 | } |
| 358 | } |
| 359 | #endif |
| 360 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 361 | static inline void mesh_plink_timer_set(struct sta_info *sta, int timeout) |
| 362 | { |
| 363 | sta->plink_timer.expires = jiffies + (HZ * timeout / 1000); |
| 364 | sta->plink_timer.data = (unsigned long) sta; |
| 365 | sta->plink_timer.function = mesh_plink_timer; |
| 366 | sta->plink_timeout = timeout; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 367 | add_timer(&sta->plink_timer); |
| 368 | } |
| 369 | |
| 370 | int mesh_plink_open(struct sta_info *sta) |
| 371 | { |
| 372 | __le16 llid; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 373 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 374 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 375 | spin_lock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 376 | get_random_bytes(&llid, 2); |
| 377 | sta->llid = llid; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 378 | if (sta->plink_state != PLINK_LISTEN) { |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 379 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 380 | return -EBUSY; |
| 381 | } |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 382 | sta->plink_state = PLINK_OPN_SNT; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 383 | mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 384 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 385 | mpl_dbg("Mesh plink: starting establishment with %pM\n", |
| 386 | sta->sta.addr); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 387 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 388 | return mesh_plink_frame_tx(sdata, PLINK_OPEN, |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 389 | sta->sta.addr, llid, 0, 0); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 390 | } |
| 391 | |
| 392 | void mesh_plink_block(struct sta_info *sta) |
| 393 | { |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 394 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 395 | bool deactivated; |
| 396 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 397 | spin_lock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 398 | deactivated = __mesh_plink_deactivate(sta); |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 399 | sta->plink_state = PLINK_BLOCKED; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 400 | spin_unlock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 401 | |
| 402 | if (deactivated) |
| 403 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 404 | } |
| 405 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 406 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 407 | 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] | 408 | size_t len, struct ieee80211_rx_status *rx_status) |
| 409 | { |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 410 | struct ieee80211_local *local = sdata->local; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 411 | struct ieee802_11_elems elems; |
| 412 | struct sta_info *sta; |
| 413 | enum plink_event event; |
| 414 | enum plink_frame_type ftype; |
| 415 | size_t baselen; |
Christian Lamparter | d12c745 | 2010-10-08 22:27:07 +0200 | [diff] [blame] | 416 | bool deactivated, matches_local = true; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 417 | u8 ie_len; |
| 418 | u8 *baseaddr; |
| 419 | __le16 plid, llid, reason; |
Rui Paulo | 1460dd1 | 2009-11-09 23:46:48 +0000 | [diff] [blame] | 420 | #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG |
| 421 | static const char *mplstates[] = { |
| 422 | [PLINK_LISTEN] = "LISTEN", |
| 423 | [PLINK_OPN_SNT] = "OPN-SNT", |
| 424 | [PLINK_OPN_RCVD] = "OPN-RCVD", |
| 425 | [PLINK_CNF_RCVD] = "CNF_RCVD", |
| 426 | [PLINK_ESTAB] = "ESTAB", |
| 427 | [PLINK_HOLDING] = "HOLDING", |
| 428 | [PLINK_BLOCKED] = "BLOCKED" |
| 429 | }; |
| 430 | #endif |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 431 | |
Johannes Berg | 9c80d3d | 2008-09-08 15:41:59 +0200 | [diff] [blame] | 432 | /* need action_code, aux */ |
| 433 | if (len < IEEE80211_MIN_ACTION_SIZE + 3) |
| 434 | return; |
| 435 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 436 | if (is_multicast_ether_addr(mgmt->da)) { |
| 437 | mpl_dbg("Mesh plink: ignore frame from multicast address"); |
| 438 | return; |
| 439 | } |
| 440 | |
| 441 | baseaddr = mgmt->u.action.u.plink_action.variable; |
| 442 | baselen = (u8 *) mgmt->u.action.u.plink_action.variable - (u8 *) mgmt; |
| 443 | if (mgmt->u.action.u.plink_action.action_code == PLINK_CONFIRM) { |
| 444 | baseaddr += 4; |
David Woo | 70bdb6b | 2009-08-12 11:03:44 -0700 | [diff] [blame] | 445 | baselen += 4; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 446 | } |
| 447 | ieee802_11_parse_elems(baseaddr, len - baselen, &elems); |
| 448 | if (!elems.peer_link) { |
| 449 | mpl_dbg("Mesh plink: missing necessary peer link ie\n"); |
| 450 | return; |
| 451 | } |
| 452 | |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 453 | ftype = mgmt->u.action.u.plink_action.action_code; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 454 | ie_len = elems.peer_link_len; |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 455 | if ((ftype == PLINK_OPEN && ie_len != 6) || |
| 456 | (ftype == PLINK_CONFIRM && ie_len != 8) || |
| 457 | (ftype == PLINK_CLOSE && ie_len != 8 && ie_len != 10)) { |
| 458 | mpl_dbg("Mesh plink: incorrect plink ie length %d %d\n", |
| 459 | ftype, ie_len); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 460 | return; |
| 461 | } |
| 462 | |
| 463 | if (ftype != PLINK_CLOSE && (!elems.mesh_id || !elems.mesh_config)) { |
| 464 | mpl_dbg("Mesh plink: missing necessary ie\n"); |
| 465 | return; |
| 466 | } |
| 467 | /* Note the lines below are correct, the llid in the frame is the plid |
| 468 | * from the point of view of this host. |
| 469 | */ |
| 470 | memcpy(&plid, PLINK_GET_LLID(elems.peer_link), 2); |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 471 | if (ftype == PLINK_CONFIRM || (ftype == PLINK_CLOSE && ie_len == 10)) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 472 | memcpy(&llid, PLINK_GET_PLID(elems.peer_link), 2); |
| 473 | |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 474 | rcu_read_lock(); |
| 475 | |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 476 | sta = sta_info_get(sdata, mgmt->sa); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 477 | if (!sta && ftype != PLINK_OPEN) { |
| 478 | mpl_dbg("Mesh plink: cls or cnf from unknown peer\n"); |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 479 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 480 | return; |
| 481 | } |
| 482 | |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 483 | if (sta && sta->plink_state == PLINK_BLOCKED) { |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 484 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 485 | return; |
| 486 | } |
| 487 | |
| 488 | /* Now we will figure out the appropriate event... */ |
| 489 | event = PLINK_UNDEFINED; |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 490 | if (ftype != PLINK_CLOSE && (!mesh_matches_local(&elems, sdata))) { |
Christian Lamparter | d12c745 | 2010-10-08 22:27:07 +0200 | [diff] [blame] | 491 | matches_local = false; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 492 | switch (ftype) { |
| 493 | case PLINK_OPEN: |
| 494 | event = OPN_RJCT; |
| 495 | break; |
| 496 | case PLINK_CONFIRM: |
| 497 | event = CNF_RJCT; |
| 498 | break; |
| 499 | case PLINK_CLOSE: |
| 500 | /* avoid warning */ |
| 501 | break; |
| 502 | } |
Christian Lamparter | d12c745 | 2010-10-08 22:27:07 +0200 | [diff] [blame] | 503 | } |
| 504 | |
| 505 | if (!sta && !matches_local) { |
| 506 | rcu_read_unlock(); |
| 507 | reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); |
| 508 | llid = 0; |
| 509 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, mgmt->sa, llid, |
| 510 | plid, reason); |
| 511 | return; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 512 | } else if (!sta) { |
| 513 | /* ftype == PLINK_OPEN */ |
Johannes Berg | 881d948 | 2009-01-21 15:13:48 +0100 | [diff] [blame] | 514 | u32 rates; |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 515 | |
| 516 | rcu_read_unlock(); |
| 517 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 518 | if (!mesh_plink_free_count(sdata)) { |
| 519 | mpl_dbg("Mesh plink error: no more free plinks\n"); |
| 520 | return; |
| 521 | } |
| 522 | |
| 523 | rates = ieee80211_sta_get_rates(local, &elems, rx_status->band); |
Johannes Berg | 03e4497 | 2008-02-27 09:56:40 +0100 | [diff] [blame] | 524 | sta = mesh_plink_alloc(sdata, mgmt->sa, rates); |
Johannes Berg | 73651ee | 2008-02-25 16:27:47 +0100 | [diff] [blame] | 525 | if (!sta) { |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 526 | mpl_dbg("Mesh plink error: plink table full\n"); |
| 527 | return; |
| 528 | } |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 529 | if (sta_info_insert_rcu(sta)) { |
Johannes Berg | 73651ee | 2008-02-25 16:27:47 +0100 | [diff] [blame] | 530 | rcu_read_unlock(); |
| 531 | return; |
| 532 | } |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 533 | event = OPN_ACPT; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 534 | spin_lock_bh(&sta->lock); |
Christian Lamparter | d12c745 | 2010-10-08 22:27:07 +0200 | [diff] [blame] | 535 | } else if (matches_local) { |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 536 | spin_lock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 537 | switch (ftype) { |
| 538 | case PLINK_OPEN: |
| 539 | if (!mesh_plink_free_count(sdata) || |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 540 | (sta->plid && sta->plid != plid)) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 541 | event = OPN_IGNR; |
| 542 | else |
| 543 | event = OPN_ACPT; |
| 544 | break; |
| 545 | case PLINK_CONFIRM: |
| 546 | if (!mesh_plink_free_count(sdata) || |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 547 | (sta->llid != llid || sta->plid != plid)) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 548 | event = CNF_IGNR; |
| 549 | else |
| 550 | event = CNF_ACPT; |
| 551 | break; |
| 552 | case PLINK_CLOSE: |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 553 | if (sta->plink_state == PLINK_ESTAB) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 554 | /* Do not check for llid or plid. This does not |
| 555 | * follow the standard but since multiple plinks |
| 556 | * per sta are not supported, it is necessary in |
| 557 | * order to avoid a livelock when MP A sees an |
| 558 | * establish peer link to MP B but MP B does not |
| 559 | * see it. This can be caused by a timeout in |
| 560 | * B's peer link establishment or B beign |
| 561 | * restarted. |
| 562 | */ |
| 563 | event = CLS_ACPT; |
| 564 | else if (sta->plid != plid) |
| 565 | event = CLS_IGNR; |
| 566 | else if (ie_len == 7 && sta->llid != llid) |
| 567 | event = CLS_IGNR; |
| 568 | else |
| 569 | event = CLS_ACPT; |
| 570 | break; |
| 571 | default: |
| 572 | mpl_dbg("Mesh plink: unknown frame subtype\n"); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 573 | spin_unlock_bh(&sta->lock); |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 574 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 575 | return; |
| 576 | } |
Christian Lamparter | d12c745 | 2010-10-08 22:27:07 +0200 | [diff] [blame] | 577 | } else { |
| 578 | spin_lock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 579 | } |
| 580 | |
Rui Paulo | 1460dd1 | 2009-11-09 23:46:48 +0000 | [diff] [blame] | 581 | mpl_dbg("Mesh plink (peer, state, llid, plid, event): %pM %s %d %d %d\n", |
| 582 | mgmt->sa, mplstates[sta->plink_state], |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 583 | le16_to_cpu(sta->llid), le16_to_cpu(sta->plid), |
| 584 | event); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 585 | reason = 0; |
| 586 | switch (sta->plink_state) { |
| 587 | /* spin_unlock as soon as state is updated at each case */ |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 588 | case PLINK_LISTEN: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 589 | switch (event) { |
| 590 | case CLS_ACPT: |
| 591 | mesh_plink_fsm_restart(sta); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 592 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 593 | break; |
| 594 | case OPN_ACPT: |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 595 | sta->plink_state = PLINK_OPN_RCVD; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 596 | sta->plid = plid; |
| 597 | get_random_bytes(&llid, 2); |
| 598 | sta->llid = llid; |
| 599 | mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 600 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 601 | mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 602 | 0, 0); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 603 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 604 | llid, plid, 0); |
| 605 | break; |
| 606 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 607 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 608 | break; |
| 609 | } |
| 610 | break; |
| 611 | |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 612 | case PLINK_OPN_SNT: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 613 | switch (event) { |
| 614 | case OPN_RJCT: |
| 615 | case CNF_RJCT: |
| 616 | reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); |
| 617 | case CLS_ACPT: |
| 618 | if (!reason) |
| 619 | reason = cpu_to_le16(MESH_CLOSE_RCVD); |
| 620 | sta->reason = reason; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 621 | sta->plink_state = PLINK_HOLDING; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 622 | if (!mod_plink_timer(sta, |
| 623 | dot11MeshHoldingTimeout(sdata))) |
| 624 | sta->ignore_plink_timer = true; |
| 625 | |
| 626 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 627 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 628 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 629 | plid, reason); |
| 630 | break; |
| 631 | case OPN_ACPT: |
| 632 | /* retry timer is left untouched */ |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 633 | sta->plink_state = PLINK_OPN_RCVD; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 634 | sta->plid = plid; |
| 635 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 636 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 637 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 638 | plid, 0); |
| 639 | break; |
| 640 | case CNF_ACPT: |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 641 | sta->plink_state = PLINK_CNF_RCVD; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 642 | if (!mod_plink_timer(sta, |
| 643 | dot11MeshConfirmTimeout(sdata))) |
| 644 | sta->ignore_plink_timer = true; |
| 645 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 646 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 647 | break; |
| 648 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 649 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 650 | break; |
| 651 | } |
| 652 | break; |
| 653 | |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 654 | case PLINK_OPN_RCVD: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 655 | switch (event) { |
| 656 | case OPN_RJCT: |
| 657 | case CNF_RJCT: |
| 658 | reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); |
| 659 | case CLS_ACPT: |
| 660 | if (!reason) |
| 661 | reason = cpu_to_le16(MESH_CLOSE_RCVD); |
| 662 | sta->reason = reason; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 663 | sta->plink_state = PLINK_HOLDING; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 664 | if (!mod_plink_timer(sta, |
| 665 | dot11MeshHoldingTimeout(sdata))) |
| 666 | sta->ignore_plink_timer = true; |
| 667 | |
| 668 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 669 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 670 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 671 | plid, reason); |
| 672 | break; |
| 673 | case OPN_ACPT: |
| 674 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 675 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 676 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 677 | plid, 0); |
| 678 | break; |
| 679 | case CNF_ACPT: |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 680 | del_timer(&sta->plink_timer); |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 681 | sta->plink_state = PLINK_ESTAB; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 682 | spin_unlock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 683 | mesh_plink_inc_estab_count(sdata); |
| 684 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 685 | mpl_dbg("Mesh plink with %pM ESTABLISHED\n", |
| 686 | sta->sta.addr); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 687 | break; |
| 688 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 689 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 690 | break; |
| 691 | } |
| 692 | break; |
| 693 | |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 694 | case PLINK_CNF_RCVD: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 695 | switch (event) { |
| 696 | case OPN_RJCT: |
| 697 | case CNF_RJCT: |
| 698 | reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); |
| 699 | case CLS_ACPT: |
| 700 | if (!reason) |
| 701 | reason = cpu_to_le16(MESH_CLOSE_RCVD); |
| 702 | sta->reason = reason; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 703 | sta->plink_state = PLINK_HOLDING; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 704 | if (!mod_plink_timer(sta, |
| 705 | dot11MeshHoldingTimeout(sdata))) |
| 706 | sta->ignore_plink_timer = true; |
| 707 | |
| 708 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 709 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 710 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 711 | plid, reason); |
Johannes Berg | ff59dc7 | 2008-02-25 10:11:50 +0100 | [diff] [blame] | 712 | break; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 713 | case OPN_ACPT: |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 714 | del_timer(&sta->plink_timer); |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 715 | sta->plink_state = PLINK_ESTAB; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 716 | spin_unlock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 717 | mesh_plink_inc_estab_count(sdata); |
| 718 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 719 | mpl_dbg("Mesh plink with %pM ESTABLISHED\n", |
| 720 | sta->sta.addr); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 721 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 722 | plid, 0); |
| 723 | break; |
| 724 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 725 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 726 | break; |
| 727 | } |
| 728 | break; |
| 729 | |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 730 | case PLINK_ESTAB: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 731 | switch (event) { |
| 732 | case CLS_ACPT: |
| 733 | reason = cpu_to_le16(MESH_CLOSE_RCVD); |
| 734 | sta->reason = reason; |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 735 | deactivated = __mesh_plink_deactivate(sta); |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 736 | sta->plink_state = PLINK_HOLDING; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 737 | llid = sta->llid; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 738 | mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 739 | spin_unlock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 740 | if (deactivated) |
| 741 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 742 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 743 | plid, reason); |
| 744 | break; |
| 745 | case OPN_ACPT: |
| 746 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 747 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 748 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 749 | plid, 0); |
| 750 | break; |
| 751 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 752 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 753 | break; |
| 754 | } |
| 755 | break; |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 756 | case PLINK_HOLDING: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 757 | switch (event) { |
| 758 | case CLS_ACPT: |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 759 | if (del_timer(&sta->plink_timer)) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 760 | sta->ignore_plink_timer = 1; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 761 | mesh_plink_fsm_restart(sta); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 762 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 763 | break; |
| 764 | case OPN_ACPT: |
| 765 | case CNF_ACPT: |
| 766 | case OPN_RJCT: |
| 767 | case CNF_RJCT: |
| 768 | llid = sta->llid; |
| 769 | reason = sta->reason; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 770 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 771 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, |
| 772 | llid, plid, reason); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 773 | break; |
| 774 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 775 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 776 | } |
| 777 | break; |
| 778 | default: |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 779 | /* should not get here, PLINK_BLOCKED is dealt with at the |
Daniel Mack | 3ad2f3f | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 780 | * beginning of the function |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 781 | */ |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 782 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 783 | break; |
| 784 | } |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 785 | |
| 786 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 787 | } |