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 | |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 22 | #define PLINK_GET_LLID(p) (p + 2) |
| 23 | #define PLINK_GET_PLID(p) (p + 4) |
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 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 28 | #define dot11MeshMaxRetries(s) (s->u.mesh.mshcfg.dot11MeshMaxRetries) |
| 29 | #define dot11MeshRetryTimeout(s) (s->u.mesh.mshcfg.dot11MeshRetryTimeout) |
| 30 | #define dot11MeshConfirmTimeout(s) (s->u.mesh.mshcfg.dot11MeshConfirmTimeout) |
| 31 | #define dot11MeshHoldingTimeout(s) (s->u.mesh.mshcfg.dot11MeshHoldingTimeout) |
| 32 | #define dot11MeshMaxPeerLinks(s) (s->u.mesh.mshcfg.dot11MeshMaxPeerLinks) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 33 | |
Ashok Nagarajan | 3d4f969 | 2012-03-06 12:48:30 -0800 | [diff] [blame] | 34 | /* We only need a valid sta if user configured a minimum rssi_threshold. */ |
| 35 | #define rssi_threshold_check(sta, sdata) \ |
Ashok Nagarajan | 5533513 | 2012-02-28 17:04:08 -0800 | [diff] [blame] | 36 | (sdata->u.mesh.mshcfg.rssi_threshold == 0 ||\ |
Ashok Nagarajan | 3d4f969 | 2012-03-06 12:48:30 -0800 | [diff] [blame] | 37 | (sta && (s8) -ewma_read(&sta->avg_signal) > \ |
| 38 | sdata->u.mesh.mshcfg.rssi_threshold)) |
Ashok Nagarajan | 5533513 | 2012-02-28 17:04:08 -0800 | [diff] [blame] | 39 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 40 | enum plink_event { |
| 41 | PLINK_UNDEFINED, |
| 42 | OPN_ACPT, |
| 43 | OPN_RJCT, |
| 44 | OPN_IGNR, |
| 45 | CNF_ACPT, |
| 46 | CNF_RJCT, |
| 47 | CNF_IGNR, |
| 48 | CLS_ACPT, |
| 49 | CLS_IGNR |
| 50 | }; |
| 51 | |
Thomas Pedersen | ba4a14e | 2011-09-20 13:43:32 -0700 | [diff] [blame] | 52 | static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata, |
| 53 | enum ieee80211_self_protected_actioncode action, |
| 54 | u8 *da, __le16 llid, __le16 plid, __le16 reason); |
| 55 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 56 | static inline |
| 57 | void mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata) |
| 58 | { |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 59 | atomic_inc(&sdata->u.mesh.mshstats.estab_plinks); |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 60 | mesh_accept_plinks_update(sdata); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 61 | } |
| 62 | |
| 63 | static inline |
| 64 | void mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata) |
| 65 | { |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 66 | atomic_dec(&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 | /** |
| 71 | * mesh_plink_fsm_restart - restart a mesh peer link finite state machine |
| 72 | * |
Rui Paulo | 23c7a29 | 2009-11-09 23:46:42 +0000 | [diff] [blame] | 73 | * @sta: mesh peer link to restart |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 74 | * |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 75 | * Locking: this function must be called holding sta->lock |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 76 | */ |
| 77 | static inline void mesh_plink_fsm_restart(struct sta_info *sta) |
| 78 | { |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 79 | sta->plink_state = NL80211_PLINK_LISTEN; |
Luis Carlos Cobo | 37659ff | 2008-02-29 12:13:38 -0800 | [diff] [blame] | 80 | sta->llid = sta->plid = sta->reason = 0; |
| 81 | sta->plink_retries = 0; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 82 | } |
| 83 | |
Johannes Berg | 93e5deb | 2008-04-01 15:21:00 +0200 | [diff] [blame] | 84 | /* |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 85 | * Allocate mesh sta entry and insert into station table |
Johannes Berg | 93e5deb | 2008-04-01 15:21:00 +0200 | [diff] [blame] | 86 | */ |
Johannes Berg | 03e4497 | 2008-02-27 09:56:40 +0100 | [diff] [blame] | 87 | static struct sta_info *mesh_plink_alloc(struct ieee80211_sub_if_data *sdata, |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 88 | u8 *hw_addr) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 89 | { |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 90 | struct sta_info *sta; |
| 91 | |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 92 | if (sdata->local->num_sta >= MESH_MAX_PLINKS) |
Johannes Berg | 73651ee | 2008-02-25 16:27:47 +0100 | [diff] [blame] | 93 | return NULL; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 94 | |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 95 | sta = sta_info_alloc(sdata, hw_addr, GFP_KERNEL); |
Johannes Berg | 73651ee | 2008-02-25 16:27:47 +0100 | [diff] [blame] | 96 | if (!sta) |
| 97 | return NULL; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 98 | |
Johannes Berg | 83d5cc0 | 2012-01-12 09:31:10 +0100 | [diff] [blame] | 99 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
| 100 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); |
| 101 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); |
Johannes Berg | d9a7ddb | 2011-12-14 12:35:30 +0100 | [diff] [blame] | 102 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 103 | set_sta_flag(sta, WLAN_STA_WME); |
Johannes Berg | d9a7ddb | 2011-12-14 12:35:30 +0100 | [diff] [blame] | 104 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 105 | return sta; |
| 106 | } |
| 107 | |
Ashok Nagarajan | 57aac7c | 2012-04-30 14:20:30 -0700 | [diff] [blame] | 108 | /** mesh_set_ht_prot_mode - set correct HT protection mode |
| 109 | * |
| 110 | * Section 9.23.3.5 of IEEE 80211s standard describes the protection rules for |
| 111 | * HT mesh STA in a MBSS. Three HT protection modes are supported for now, |
| 112 | * non-HT mixed mode, 20MHz-protection and no-protection mode. non-HT mixed |
| 113 | * mode is selected if any non-HT peers are present in our MBSS. |
| 114 | * 20MHz-protection mode is selected if all peers in our 20/40MHz MBSS support |
| 115 | * HT and atleast one HT20 peer is present. Otherwise no-protection mode is |
| 116 | * selected. |
| 117 | */ |
| 118 | static u32 mesh_set_ht_prot_mode(struct ieee80211_sub_if_data *sdata) |
| 119 | { |
| 120 | struct ieee80211_local *local = sdata->local; |
| 121 | struct sta_info *sta; |
| 122 | u32 changed = 0; |
| 123 | u16 ht_opmode; |
| 124 | bool non_ht_sta = false, ht20_sta = false; |
| 125 | |
| 126 | if (local->_oper_channel_type == NL80211_CHAN_NO_HT) |
| 127 | return 0; |
| 128 | |
| 129 | rcu_read_lock(); |
| 130 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
| 131 | if (sdata == sta->sdata && |
| 132 | sta->plink_state == NL80211_PLINK_ESTAB) { |
| 133 | switch (sta->ch_type) { |
| 134 | case NL80211_CHAN_NO_HT: |
| 135 | mpl_dbg("mesh_plink %pM: nonHT sta (%pM) is present", |
| 136 | sdata->vif.addr, sta->sta.addr); |
| 137 | non_ht_sta = true; |
| 138 | goto out; |
| 139 | case NL80211_CHAN_HT20: |
| 140 | mpl_dbg("mesh_plink %pM: HT20 sta (%pM) is present", |
| 141 | sdata->vif.addr, sta->sta.addr); |
| 142 | ht20_sta = true; |
| 143 | default: |
| 144 | break; |
| 145 | } |
| 146 | } |
| 147 | } |
| 148 | out: |
| 149 | rcu_read_unlock(); |
| 150 | |
| 151 | if (non_ht_sta) |
| 152 | ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED; |
| 153 | else if (ht20_sta && local->_oper_channel_type > NL80211_CHAN_HT20) |
| 154 | ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_20MHZ; |
| 155 | else |
| 156 | ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONE; |
| 157 | |
| 158 | if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { |
| 159 | sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
| 160 | changed = BSS_CHANGED_HT; |
| 161 | mpl_dbg("mesh_plink %pM: protection mode changed to %d", |
| 162 | sdata->vif.addr, ht_opmode); |
| 163 | } |
| 164 | |
| 165 | return changed; |
| 166 | } |
| 167 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 168 | /** |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 169 | * __mesh_plink_deactivate - deactivate mesh peer link |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 170 | * |
| 171 | * @sta: mesh peer link to deactivate |
| 172 | * |
| 173 | * All mesh paths with this peer as next hop will be flushed |
| 174 | * |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 175 | * Locking: the caller must hold sta->lock |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 176 | */ |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 177 | static bool __mesh_plink_deactivate(struct sta_info *sta) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 178 | { |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 179 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 180 | bool deactivated = false; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 181 | |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 182 | if (sta->plink_state == NL80211_PLINK_ESTAB) { |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 183 | mesh_plink_dec_estab_count(sdata); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 184 | deactivated = true; |
| 185 | } |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 186 | sta->plink_state = NL80211_PLINK_BLOCKED; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 187 | mesh_path_flush_by_nexthop(sta); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 188 | |
| 189 | return deactivated; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 190 | } |
| 191 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 192 | /** |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 193 | * mesh_plink_deactivate - deactivate mesh peer link |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 194 | * |
| 195 | * @sta: mesh peer link to deactivate |
| 196 | * |
| 197 | * All mesh paths with this peer as next hop will be flushed |
| 198 | */ |
| 199 | void mesh_plink_deactivate(struct sta_info *sta) |
| 200 | { |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 201 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 202 | bool deactivated; |
| 203 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 204 | spin_lock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 205 | deactivated = __mesh_plink_deactivate(sta); |
Thomas Pedersen | ba4a14e | 2011-09-20 13:43:32 -0700 | [diff] [blame] | 206 | sta->reason = cpu_to_le16(WLAN_REASON_MESH_PEER_CANCELED); |
| 207 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, |
| 208 | sta->sta.addr, sta->llid, sta->plid, |
| 209 | sta->reason); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 210 | spin_unlock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 211 | |
| 212 | if (deactivated) |
| 213 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 214 | } |
| 215 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 216 | static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata, |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 217 | enum ieee80211_self_protected_actioncode action, |
| 218 | u8 *da, __le16 llid, __le16 plid, __le16 reason) { |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 219 | struct ieee80211_local *local = sdata->local; |
Thomas Pedersen | 3b69a9c | 2011-10-26 14:47:25 -0700 | [diff] [blame] | 220 | struct sk_buff *skb; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 221 | struct ieee80211_mgmt *mgmt; |
| 222 | bool include_plid = false; |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 223 | u16 peering_proto = 0; |
Thomas Pedersen | 3b69a9c | 2011-10-26 14:47:25 -0700 | [diff] [blame] | 224 | u8 *pos, ie_len = 4; |
| 225 | int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.self_prot) + |
| 226 | sizeof(mgmt->u.action.u.self_prot); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 227 | |
Javier Cardona | 65e8b0c | 2012-01-17 18:17:46 -0800 | [diff] [blame] | 228 | skb = dev_alloc_skb(local->tx_headroom + |
Thomas Pedersen | 3b69a9c | 2011-10-26 14:47:25 -0700 | [diff] [blame] | 229 | hdr_len + |
| 230 | 2 + /* capability info */ |
| 231 | 2 + /* AID */ |
| 232 | 2 + 8 + /* supported rates */ |
| 233 | 2 + (IEEE80211_MAX_SUPP_RATES - 8) + |
| 234 | 2 + sdata->u.mesh.mesh_id_len + |
| 235 | 2 + sizeof(struct ieee80211_meshconf_ie) + |
Thomas Pedersen | 176f360 | 2011-10-26 14:47:27 -0700 | [diff] [blame] | 236 | 2 + sizeof(struct ieee80211_ht_cap) + |
Johannes Berg | 074d46d | 2012-03-15 19:45:16 +0100 | [diff] [blame] | 237 | 2 + sizeof(struct ieee80211_ht_operation) + |
Thomas Pedersen | 3b69a9c | 2011-10-26 14:47:25 -0700 | [diff] [blame] | 238 | 2 + 8 + /* peering IE */ |
| 239 | sdata->u.mesh.ie_len); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 240 | if (!skb) |
| 241 | return -1; |
Javier Cardona | 65e8b0c | 2012-01-17 18:17:46 -0800 | [diff] [blame] | 242 | skb_reserve(skb, local->tx_headroom); |
Thomas Pedersen | 3b69a9c | 2011-10-26 14:47:25 -0700 | [diff] [blame] | 243 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len); |
| 244 | memset(mgmt, 0, hdr_len); |
Harvey Harrison | e7827a7 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 245 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 246 | IEEE80211_STYPE_ACTION); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 247 | memcpy(mgmt->da, da, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 248 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
Javier Cardona | 915b5c5 | 2011-05-03 16:57:10 -0700 | [diff] [blame] | 249 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 250 | mgmt->u.action.category = WLAN_CATEGORY_SELF_PROTECTED; |
| 251 | mgmt->u.action.u.self_prot.action_code = action; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 252 | |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 253 | if (action != WLAN_SP_MESH_PEERING_CLOSE) { |
| 254 | /* capability info */ |
| 255 | pos = skb_put(skb, 2); |
| 256 | memset(pos, 0, 2); |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 257 | if (action == WLAN_SP_MESH_PEERING_CONFIRM) { |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 258 | /* AID */ |
| 259 | pos = skb_put(skb, 2); |
Rui Paulo | 77fa76b | 2009-11-09 23:46:52 +0000 | [diff] [blame] | 260 | memcpy(pos + 2, &plid, 2); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 261 | } |
Ashok Nagarajan | 657c3e0 | 2012-04-02 21:21:20 -0700 | [diff] [blame] | 262 | if (ieee80211_add_srates_ie(&sdata->vif, skb, true) || |
| 263 | ieee80211_add_ext_srates_ie(&sdata->vif, skb, true) || |
Thomas Pedersen | 082ebb0 | 2011-08-11 19:35:10 -0700 | [diff] [blame] | 264 | mesh_add_rsn_ie(skb, sdata) || |
| 265 | mesh_add_meshid_ie(skb, sdata) || |
| 266 | mesh_add_meshconf_ie(skb, sdata)) |
| 267 | return -1; |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 268 | } else { /* WLAN_SP_MESH_PEERING_CLOSE */ |
| 269 | if (mesh_add_meshid_ie(skb, sdata)) |
| 270 | return -1; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 271 | } |
| 272 | |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 273 | /* Add Mesh Peering Management element */ |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 274 | switch (action) { |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 275 | case WLAN_SP_MESH_PEERING_OPEN: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 276 | break; |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 277 | case WLAN_SP_MESH_PEERING_CONFIRM: |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 278 | ie_len += 2; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 279 | include_plid = true; |
| 280 | break; |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 281 | case WLAN_SP_MESH_PEERING_CLOSE: |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 282 | if (plid) { |
| 283 | ie_len += 2; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 284 | include_plid = true; |
| 285 | } |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 286 | ie_len += 2; /* reason code */ |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 287 | break; |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 288 | default: |
| 289 | return -EINVAL; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 290 | } |
| 291 | |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 292 | if (WARN_ON(skb_tailroom(skb) < 2 + ie_len)) |
| 293 | return -ENOMEM; |
| 294 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 295 | pos = skb_put(skb, 2 + ie_len); |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 296 | *pos++ = WLAN_EID_PEER_MGMT; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 297 | *pos++ = ie_len; |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 298 | memcpy(pos, &peering_proto, 2); |
| 299 | pos += 2; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 300 | memcpy(pos, &llid, 2); |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 301 | pos += 2; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 302 | if (include_plid) { |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 303 | memcpy(pos, &plid, 2); |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 304 | pos += 2; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 305 | } |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 306 | if (action == WLAN_SP_MESH_PEERING_CLOSE) { |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 307 | memcpy(pos, &reason, 2); |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 308 | pos += 2; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 309 | } |
Thomas Pedersen | 176f360 | 2011-10-26 14:47:27 -0700 | [diff] [blame] | 310 | |
| 311 | if (action != WLAN_SP_MESH_PEERING_CLOSE) { |
| 312 | if (mesh_add_ht_cap_ie(skb, sdata) || |
Johannes Berg | 074d46d | 2012-03-15 19:45:16 +0100 | [diff] [blame] | 313 | mesh_add_ht_oper_ie(skb, sdata)) |
Thomas Pedersen | 176f360 | 2011-10-26 14:47:27 -0700 | [diff] [blame] | 314 | return -1; |
| 315 | } |
| 316 | |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 317 | if (mesh_add_vendor_ies(skb, sdata)) |
| 318 | return -1; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 319 | |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 320 | ieee80211_tx_skb(sdata, skb); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 321 | return 0; |
| 322 | } |
| 323 | |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 324 | /* mesh_peer_init - initialize new mesh peer and return resulting sta_info |
| 325 | * |
| 326 | * @sdata: local meshif |
| 327 | * @addr: peer's address |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 328 | * @elems: IEs from beacon or mesh peering frame |
| 329 | * |
| 330 | * call under RCU |
| 331 | */ |
| 332 | static struct sta_info *mesh_peer_init(struct ieee80211_sub_if_data *sdata, |
Thomas Pedersen | f743ff4 | 2012-04-18 19:23:43 -0700 | [diff] [blame] | 333 | u8 *addr, |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 334 | struct ieee802_11_elems *elems) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 335 | { |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 336 | struct ieee80211_local *local = sdata->local; |
Thomas Pedersen | f743ff4 | 2012-04-18 19:23:43 -0700 | [diff] [blame] | 337 | enum ieee80211_band band = local->oper_channel->band; |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 338 | struct ieee80211_supported_band *sband; |
Thomas Pedersen | f743ff4 | 2012-04-18 19:23:43 -0700 | [diff] [blame] | 339 | u32 rates, basic_rates = 0; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 340 | struct sta_info *sta; |
Thomas Pedersen | e87278e | 2012-04-26 15:01:06 -0700 | [diff] [blame] | 341 | bool insert = false; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 342 | |
Thomas Pedersen | f743ff4 | 2012-04-18 19:23:43 -0700 | [diff] [blame] | 343 | sband = local->hw.wiphy->bands[band]; |
| 344 | rates = ieee80211_sta_get_rates(local, elems, band, &basic_rates); |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 345 | |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 346 | sta = sta_info_get(sdata, addr); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 347 | if (!sta) { |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 348 | sta = mesh_plink_alloc(sdata, addr); |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 349 | if (!sta) |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 350 | return NULL; |
Thomas Pedersen | e87278e | 2012-04-26 15:01:06 -0700 | [diff] [blame] | 351 | insert = true; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 352 | } |
| 353 | |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 354 | spin_lock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 355 | sta->last_rx = jiffies; |
Thomas Pedersen | f743ff4 | 2012-04-18 19:23:43 -0700 | [diff] [blame] | 356 | sta->sta.supp_rates[band] = rates; |
Thomas Pedersen | e76781e | 2012-04-18 19:24:13 -0700 | [diff] [blame] | 357 | if (elems->ht_cap_elem && |
| 358 | sdata->local->_oper_channel_type != NL80211_CHAN_NO_HT) |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 359 | ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
| 360 | elems->ht_cap_elem, |
| 361 | &sta->sta.ht_cap); |
| 362 | else |
| 363 | memset(&sta->sta.ht_cap, 0, sizeof(sta->sta.ht_cap)); |
| 364 | |
Ashok Nagarajan | 57aac7c | 2012-04-30 14:20:30 -0700 | [diff] [blame] | 365 | if (elems->ht_operation) { |
Thomas Pedersen | c7d2582 | 2012-04-26 15:01:07 -0700 | [diff] [blame] | 366 | if (!(elems->ht_operation->ht_param & |
| 367 | IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) |
| 368 | sta->sta.ht_cap.cap &= |
| 369 | ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
Ashok Nagarajan | 57aac7c | 2012-04-30 14:20:30 -0700 | [diff] [blame] | 370 | sta->ch_type = |
| 371 | ieee80211_ht_oper_to_channel_type(elems->ht_operation); |
| 372 | } |
Thomas Pedersen | c7d2582 | 2012-04-26 15:01:07 -0700 | [diff] [blame] | 373 | |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 374 | rate_control_rate_init(sta); |
| 375 | spin_unlock_bh(&sta->lock); |
| 376 | |
Thomas Pedersen | e87278e | 2012-04-26 15:01:06 -0700 | [diff] [blame] | 377 | if (insert && sta_info_insert(sta)) |
| 378 | return NULL; |
| 379 | |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 380 | return sta; |
| 381 | } |
| 382 | |
Thomas Pedersen | f743ff4 | 2012-04-18 19:23:43 -0700 | [diff] [blame] | 383 | void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata, |
| 384 | u8 *hw_addr, |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 385 | struct ieee802_11_elems *elems) |
| 386 | { |
| 387 | struct sta_info *sta; |
| 388 | |
| 389 | /* Userspace handles peer allocation when security is enabled */ |
| 390 | if (sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED) { |
| 391 | cfg80211_notify_new_peer_candidate(sdata->dev, hw_addr, |
| 392 | elems->ie_start, |
| 393 | elems->total_len, |
| 394 | GFP_KERNEL); |
| 395 | return; |
| 396 | } |
| 397 | |
| 398 | rcu_read_lock(); |
Thomas Pedersen | f743ff4 | 2012-04-18 19:23:43 -0700 | [diff] [blame] | 399 | sta = mesh_peer_init(sdata, hw_addr, elems); |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 400 | if (!sta) |
| 401 | goto out; |
| 402 | |
Javier Cardona | 1570ca5 | 2011-04-07 15:08:35 -0700 | [diff] [blame] | 403 | if (mesh_peer_accepts_plinks(elems) && |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 404 | sta->plink_state == NL80211_PLINK_LISTEN && |
| 405 | sdata->u.mesh.accepting_plinks && |
| 406 | sdata->u.mesh.mshcfg.auto_open_plinks && |
| 407 | rssi_threshold_check(sta, sdata)) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 408 | mesh_plink_open(sta); |
| 409 | |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 410 | out: |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 411 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | static void mesh_plink_timer(unsigned long data) |
| 415 | { |
| 416 | struct sta_info *sta; |
| 417 | __le16 llid, plid, reason; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 418 | struct ieee80211_sub_if_data *sdata; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 419 | |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 420 | /* |
| 421 | * This STA is valid because sta_info_destroy() will |
| 422 | * del_timer_sync() this timer after having made sure |
| 423 | * it cannot be readded (by deleting the plink.) |
| 424 | */ |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 425 | sta = (struct sta_info *) data; |
| 426 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 427 | if (sta->sdata->local->quiescing) { |
| 428 | sta->plink_timer_was_running = true; |
| 429 | return; |
| 430 | } |
| 431 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 432 | spin_lock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 433 | if (sta->ignore_plink_timer) { |
| 434 | sta->ignore_plink_timer = false; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 435 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 436 | return; |
| 437 | } |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 438 | mpl_dbg("Mesh plink timer for %pM fired on state %d\n", |
| 439 | sta->sta.addr, sta->plink_state); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 440 | reason = 0; |
| 441 | llid = sta->llid; |
| 442 | plid = sta->plid; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 443 | sdata = sta->sdata; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 444 | |
| 445 | switch (sta->plink_state) { |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 446 | case NL80211_PLINK_OPN_RCVD: |
| 447 | case NL80211_PLINK_OPN_SNT: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 448 | /* retry timer */ |
| 449 | if (sta->plink_retries < dot11MeshMaxRetries(sdata)) { |
| 450 | u32 rand; |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 451 | mpl_dbg("Mesh plink for %pM (retry, timeout): %d %d\n", |
| 452 | sta->sta.addr, sta->plink_retries, |
| 453 | sta->plink_timeout); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 454 | get_random_bytes(&rand, sizeof(u32)); |
| 455 | sta->plink_timeout = sta->plink_timeout + |
| 456 | rand % sta->plink_timeout; |
| 457 | ++sta->plink_retries; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 458 | mod_plink_timer(sta, sta->plink_timeout); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 459 | spin_unlock_bh(&sta->lock); |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 460 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN, |
| 461 | sta->sta.addr, llid, 0, 0); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 462 | break; |
| 463 | } |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 464 | reason = cpu_to_le16(WLAN_REASON_MESH_MAX_RETRIES); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 465 | /* fall through on else */ |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 466 | case NL80211_PLINK_CNF_RCVD: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 467 | /* confirm timer */ |
| 468 | if (!reason) |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 469 | reason = cpu_to_le16(WLAN_REASON_MESH_CONFIRM_TIMEOUT); |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 470 | sta->plink_state = NL80211_PLINK_HOLDING; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 471 | mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 472 | spin_unlock_bh(&sta->lock); |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 473 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, |
| 474 | sta->sta.addr, llid, plid, reason); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 475 | break; |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 476 | case NL80211_PLINK_HOLDING: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 477 | /* holding timer */ |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 478 | del_timer(&sta->plink_timer); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 479 | mesh_plink_fsm_restart(sta); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 480 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 481 | break; |
| 482 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 483 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 484 | break; |
| 485 | } |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 486 | } |
| 487 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 488 | #ifdef CONFIG_PM |
| 489 | void mesh_plink_quiesce(struct sta_info *sta) |
| 490 | { |
| 491 | if (del_timer_sync(&sta->plink_timer)) |
| 492 | sta->plink_timer_was_running = true; |
| 493 | } |
| 494 | |
| 495 | void mesh_plink_restart(struct sta_info *sta) |
| 496 | { |
| 497 | if (sta->plink_timer_was_running) { |
| 498 | add_timer(&sta->plink_timer); |
| 499 | sta->plink_timer_was_running = false; |
| 500 | } |
| 501 | } |
| 502 | #endif |
| 503 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 504 | static inline void mesh_plink_timer_set(struct sta_info *sta, int timeout) |
| 505 | { |
| 506 | sta->plink_timer.expires = jiffies + (HZ * timeout / 1000); |
| 507 | sta->plink_timer.data = (unsigned long) sta; |
| 508 | sta->plink_timer.function = mesh_plink_timer; |
| 509 | sta->plink_timeout = timeout; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 510 | add_timer(&sta->plink_timer); |
| 511 | } |
| 512 | |
| 513 | int mesh_plink_open(struct sta_info *sta) |
| 514 | { |
| 515 | __le16 llid; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 516 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 517 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 518 | if (!test_sta_flag(sta, WLAN_STA_AUTH)) |
Javier Cardona | 53e8051 | 2011-04-07 15:08:32 -0700 | [diff] [blame] | 519 | return -EPERM; |
| 520 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 521 | spin_lock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 522 | get_random_bytes(&llid, 2); |
| 523 | sta->llid = llid; |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 524 | if (sta->plink_state != NL80211_PLINK_LISTEN) { |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 525 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 526 | return -EBUSY; |
| 527 | } |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 528 | sta->plink_state = NL80211_PLINK_OPN_SNT; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 529 | mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 530 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 531 | mpl_dbg("Mesh plink: starting establishment with %pM\n", |
| 532 | sta->sta.addr); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 533 | |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 534 | return mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN, |
Johannes Berg | 17741cd | 2008-09-11 00:02:02 +0200 | [diff] [blame] | 535 | sta->sta.addr, llid, 0, 0); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 536 | } |
| 537 | |
| 538 | void mesh_plink_block(struct sta_info *sta) |
| 539 | { |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 540 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 541 | bool deactivated; |
| 542 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 543 | spin_lock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 544 | deactivated = __mesh_plink_deactivate(sta); |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 545 | sta->plink_state = NL80211_PLINK_BLOCKED; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 546 | spin_unlock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 547 | |
| 548 | if (deactivated) |
| 549 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 550 | } |
| 551 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 552 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 553 | 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] | 554 | size_t len, struct ieee80211_rx_status *rx_status) |
| 555 | { |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 556 | struct ieee802_11_elems elems; |
| 557 | struct sta_info *sta; |
| 558 | enum plink_event event; |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 559 | enum ieee80211_self_protected_actioncode ftype; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 560 | size_t baselen; |
Ashok Nagarajan | 57aac7c | 2012-04-30 14:20:30 -0700 | [diff] [blame] | 561 | bool matches_local = true; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 562 | u8 ie_len; |
| 563 | u8 *baseaddr; |
Ashok Nagarajan | 57aac7c | 2012-04-30 14:20:30 -0700 | [diff] [blame] | 564 | u32 changed = 0; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 565 | __le16 plid, llid, reason; |
Rui Paulo | 1460dd1 | 2009-11-09 23:46:48 +0000 | [diff] [blame] | 566 | #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG |
| 567 | static const char *mplstates[] = { |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 568 | [NL80211_PLINK_LISTEN] = "LISTEN", |
| 569 | [NL80211_PLINK_OPN_SNT] = "OPN-SNT", |
| 570 | [NL80211_PLINK_OPN_RCVD] = "OPN-RCVD", |
| 571 | [NL80211_PLINK_CNF_RCVD] = "CNF_RCVD", |
| 572 | [NL80211_PLINK_ESTAB] = "ESTAB", |
| 573 | [NL80211_PLINK_HOLDING] = "HOLDING", |
| 574 | [NL80211_PLINK_BLOCKED] = "BLOCKED" |
Rui Paulo | 1460dd1 | 2009-11-09 23:46:48 +0000 | [diff] [blame] | 575 | }; |
| 576 | #endif |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 577 | |
Johannes Berg | 9c80d3d | 2008-09-08 15:41:59 +0200 | [diff] [blame] | 578 | /* need action_code, aux */ |
| 579 | if (len < IEEE80211_MIN_ACTION_SIZE + 3) |
| 580 | return; |
| 581 | |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 582 | if (is_multicast_ether_addr(mgmt->da)) { |
| 583 | mpl_dbg("Mesh plink: ignore frame from multicast address"); |
| 584 | return; |
| 585 | } |
| 586 | |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 587 | baseaddr = mgmt->u.action.u.self_prot.variable; |
| 588 | baselen = (u8 *) mgmt->u.action.u.self_prot.variable - (u8 *) mgmt; |
| 589 | if (mgmt->u.action.u.self_prot.action_code == |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 590 | WLAN_SP_MESH_PEERING_CONFIRM) { |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 591 | baseaddr += 4; |
David Woo | 70bdb6b | 2009-08-12 11:03:44 -0700 | [diff] [blame] | 592 | baselen += 4; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 593 | } |
| 594 | ieee802_11_parse_elems(baseaddr, len - baselen, &elems); |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 595 | if (!elems.peering) { |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 596 | mpl_dbg("Mesh plink: missing necessary peer link ie\n"); |
| 597 | return; |
| 598 | } |
Javier Cardona | b130e5c | 2011-05-03 16:57:07 -0700 | [diff] [blame] | 599 | if (elems.rsn_len && |
| 600 | sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) { |
Javier Cardona | 5cff5e0 | 2011-04-07 15:08:29 -0700 | [diff] [blame] | 601 | mpl_dbg("Mesh plink: can't establish link with secure peer\n"); |
| 602 | return; |
| 603 | } |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 604 | |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 605 | ftype = mgmt->u.action.u.self_prot.action_code; |
| 606 | ie_len = elems.peering_len; |
| 607 | if ((ftype == WLAN_SP_MESH_PEERING_OPEN && ie_len != 4) || |
| 608 | (ftype == WLAN_SP_MESH_PEERING_CONFIRM && ie_len != 6) || |
| 609 | (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len != 6 |
| 610 | && ie_len != 8)) { |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 611 | mpl_dbg("Mesh plink: incorrect plink ie length %d %d\n", |
| 612 | ftype, ie_len); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 613 | return; |
| 614 | } |
| 615 | |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 616 | if (ftype != WLAN_SP_MESH_PEERING_CLOSE && |
| 617 | (!elems.mesh_id || !elems.mesh_config)) { |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 618 | mpl_dbg("Mesh plink: missing necessary ie\n"); |
| 619 | return; |
| 620 | } |
| 621 | /* Note the lines below are correct, the llid in the frame is the plid |
| 622 | * from the point of view of this host. |
| 623 | */ |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 624 | memcpy(&plid, PLINK_GET_LLID(elems.peering), 2); |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 625 | if (ftype == WLAN_SP_MESH_PEERING_CONFIRM || |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 626 | (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len == 8)) |
| 627 | memcpy(&llid, PLINK_GET_PLID(elems.peering), 2); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 628 | |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 629 | rcu_read_lock(); |
| 630 | |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 631 | sta = sta_info_get(sdata, mgmt->sa); |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 632 | if (!sta && ftype != WLAN_SP_MESH_PEERING_OPEN) { |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 633 | mpl_dbg("Mesh plink: cls or cnf from unknown peer\n"); |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 634 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 635 | return; |
| 636 | } |
| 637 | |
Ashok Nagarajan | 5533513 | 2012-02-28 17:04:08 -0800 | [diff] [blame] | 638 | if (ftype == WLAN_SP_MESH_PEERING_OPEN && |
Ashok Nagarajan | 3d4f969 | 2012-03-06 12:48:30 -0800 | [diff] [blame] | 639 | !rssi_threshold_check(sta, sdata)) { |
Ashok Nagarajan | 5533513 | 2012-02-28 17:04:08 -0800 | [diff] [blame] | 640 | mpl_dbg("Mesh plink: %pM does not meet rssi threshold\n", |
Ashok Nagarajan | 3d4f969 | 2012-03-06 12:48:30 -0800 | [diff] [blame] | 641 | mgmt->sa); |
Ashok Nagarajan | 5533513 | 2012-02-28 17:04:08 -0800 | [diff] [blame] | 642 | rcu_read_unlock(); |
| 643 | return; |
| 644 | } |
| 645 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 646 | if (sta && !test_sta_flag(sta, WLAN_STA_AUTH)) { |
Javier Cardona | 53e8051 | 2011-04-07 15:08:32 -0700 | [diff] [blame] | 647 | mpl_dbg("Mesh plink: Action frame from non-authed peer\n"); |
| 648 | rcu_read_unlock(); |
| 649 | return; |
| 650 | } |
| 651 | |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 652 | if (sta && sta->plink_state == NL80211_PLINK_BLOCKED) { |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 653 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 654 | return; |
| 655 | } |
| 656 | |
| 657 | /* Now we will figure out the appropriate event... */ |
| 658 | event = PLINK_UNDEFINED; |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 659 | if (ftype != WLAN_SP_MESH_PEERING_CLOSE && |
Thomas Pedersen | f743ff4 | 2012-04-18 19:23:43 -0700 | [diff] [blame] | 660 | !mesh_matches_local(sdata, &elems)) { |
Christian Lamparter | d12c745 | 2010-10-08 22:27:07 +0200 | [diff] [blame] | 661 | matches_local = false; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 662 | switch (ftype) { |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 663 | case WLAN_SP_MESH_PEERING_OPEN: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 664 | event = OPN_RJCT; |
| 665 | break; |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 666 | case WLAN_SP_MESH_PEERING_CONFIRM: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 667 | event = CNF_RJCT; |
| 668 | break; |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 669 | default: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 670 | break; |
| 671 | } |
Christian Lamparter | d12c745 | 2010-10-08 22:27:07 +0200 | [diff] [blame] | 672 | } |
| 673 | |
| 674 | if (!sta && !matches_local) { |
| 675 | rcu_read_unlock(); |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 676 | reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); |
Christian Lamparter | d12c745 | 2010-10-08 22:27:07 +0200 | [diff] [blame] | 677 | llid = 0; |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 678 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, |
| 679 | mgmt->sa, llid, plid, reason); |
Christian Lamparter | d12c745 | 2010-10-08 22:27:07 +0200 | [diff] [blame] | 680 | return; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 681 | } else if (!sta) { |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 682 | /* ftype == WLAN_SP_MESH_PEERING_OPEN */ |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 683 | if (!mesh_plink_free_count(sdata)) { |
| 684 | mpl_dbg("Mesh plink error: no more free plinks\n"); |
Johannes Berg | 73651ee | 2008-02-25 16:27:47 +0100 | [diff] [blame] | 685 | rcu_read_unlock(); |
| 686 | return; |
| 687 | } |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 688 | event = OPN_ACPT; |
Christian Lamparter | d12c745 | 2010-10-08 22:27:07 +0200 | [diff] [blame] | 689 | } else if (matches_local) { |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 690 | switch (ftype) { |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 691 | case WLAN_SP_MESH_PEERING_OPEN: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 692 | if (!mesh_plink_free_count(sdata) || |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 693 | (sta->plid && sta->plid != plid)) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 694 | event = OPN_IGNR; |
| 695 | else |
| 696 | event = OPN_ACPT; |
| 697 | break; |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 698 | case WLAN_SP_MESH_PEERING_CONFIRM: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 699 | if (!mesh_plink_free_count(sdata) || |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 700 | (sta->llid != llid || sta->plid != plid)) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 701 | event = CNF_IGNR; |
| 702 | else |
| 703 | event = CNF_ACPT; |
| 704 | break; |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 705 | case WLAN_SP_MESH_PEERING_CLOSE: |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 706 | if (sta->plink_state == NL80211_PLINK_ESTAB) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 707 | /* Do not check for llid or plid. This does not |
| 708 | * follow the standard but since multiple plinks |
| 709 | * per sta are not supported, it is necessary in |
| 710 | * order to avoid a livelock when MP A sees an |
| 711 | * establish peer link to MP B but MP B does not |
| 712 | * see it. This can be caused by a timeout in |
| 713 | * B's peer link establishment or B beign |
| 714 | * restarted. |
| 715 | */ |
| 716 | event = CLS_ACPT; |
| 717 | else if (sta->plid != plid) |
| 718 | event = CLS_IGNR; |
| 719 | else if (ie_len == 7 && sta->llid != llid) |
| 720 | event = CLS_IGNR; |
| 721 | else |
| 722 | event = CLS_ACPT; |
| 723 | break; |
| 724 | default: |
| 725 | mpl_dbg("Mesh plink: unknown frame subtype\n"); |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 726 | rcu_read_unlock(); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 727 | return; |
| 728 | } |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 729 | } |
| 730 | |
| 731 | if (event == OPN_ACPT) { |
| 732 | /* allocate sta entry if necessary and update info */ |
Thomas Pedersen | f743ff4 | 2012-04-18 19:23:43 -0700 | [diff] [blame] | 733 | sta = mesh_peer_init(sdata, mgmt->sa, &elems); |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 734 | if (!sta) { |
| 735 | mpl_dbg("Mesh plink: failed to init peer!\n"); |
| 736 | rcu_read_unlock(); |
| 737 | return; |
| 738 | } |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 739 | } |
| 740 | |
Rui Paulo | 1460dd1 | 2009-11-09 23:46:48 +0000 | [diff] [blame] | 741 | mpl_dbg("Mesh plink (peer, state, llid, plid, event): %pM %s %d %d %d\n", |
| 742 | mgmt->sa, mplstates[sta->plink_state], |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 743 | le16_to_cpu(sta->llid), le16_to_cpu(sta->plid), |
| 744 | event); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 745 | reason = 0; |
Thomas Pedersen | 54ab1ff | 2012-04-18 19:23:42 -0700 | [diff] [blame] | 746 | spin_lock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 747 | switch (sta->plink_state) { |
| 748 | /* spin_unlock as soon as state is updated at each case */ |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 749 | case NL80211_PLINK_LISTEN: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 750 | switch (event) { |
| 751 | case CLS_ACPT: |
| 752 | mesh_plink_fsm_restart(sta); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 753 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 754 | break; |
| 755 | case OPN_ACPT: |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 756 | sta->plink_state = NL80211_PLINK_OPN_RCVD; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 757 | sta->plid = plid; |
| 758 | get_random_bytes(&llid, 2); |
| 759 | sta->llid = llid; |
| 760 | mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 761 | spin_unlock_bh(&sta->lock); |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 762 | mesh_plink_frame_tx(sdata, |
| 763 | WLAN_SP_MESH_PEERING_OPEN, |
| 764 | sta->sta.addr, llid, 0, 0); |
| 765 | mesh_plink_frame_tx(sdata, |
| 766 | WLAN_SP_MESH_PEERING_CONFIRM, |
| 767 | sta->sta.addr, llid, plid, 0); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 768 | break; |
| 769 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 770 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 771 | break; |
| 772 | } |
| 773 | break; |
| 774 | |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 775 | case NL80211_PLINK_OPN_SNT: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 776 | switch (event) { |
| 777 | case OPN_RJCT: |
| 778 | case CNF_RJCT: |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 779 | reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 780 | case CLS_ACPT: |
| 781 | if (!reason) |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 782 | reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 783 | sta->reason = reason; |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 784 | sta->plink_state = NL80211_PLINK_HOLDING; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 785 | if (!mod_plink_timer(sta, |
| 786 | dot11MeshHoldingTimeout(sdata))) |
| 787 | sta->ignore_plink_timer = true; |
| 788 | |
| 789 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 790 | spin_unlock_bh(&sta->lock); |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 791 | mesh_plink_frame_tx(sdata, |
| 792 | WLAN_SP_MESH_PEERING_CLOSE, |
| 793 | sta->sta.addr, llid, plid, reason); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 794 | break; |
| 795 | case OPN_ACPT: |
| 796 | /* retry timer is left untouched */ |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 797 | sta->plink_state = NL80211_PLINK_OPN_RCVD; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 798 | sta->plid = plid; |
| 799 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 800 | spin_unlock_bh(&sta->lock); |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 801 | mesh_plink_frame_tx(sdata, |
| 802 | WLAN_SP_MESH_PEERING_CONFIRM, |
| 803 | sta->sta.addr, llid, plid, 0); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 804 | break; |
| 805 | case CNF_ACPT: |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 806 | sta->plink_state = NL80211_PLINK_CNF_RCVD; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 807 | if (!mod_plink_timer(sta, |
| 808 | dot11MeshConfirmTimeout(sdata))) |
| 809 | sta->ignore_plink_timer = true; |
| 810 | |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 811 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 812 | break; |
| 813 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 814 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 815 | break; |
| 816 | } |
| 817 | break; |
| 818 | |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 819 | case NL80211_PLINK_OPN_RCVD: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 820 | switch (event) { |
| 821 | case OPN_RJCT: |
| 822 | case CNF_RJCT: |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 823 | reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 824 | case CLS_ACPT: |
| 825 | if (!reason) |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 826 | reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 827 | sta->reason = reason; |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 828 | sta->plink_state = NL80211_PLINK_HOLDING; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 829 | if (!mod_plink_timer(sta, |
| 830 | dot11MeshHoldingTimeout(sdata))) |
| 831 | sta->ignore_plink_timer = true; |
| 832 | |
| 833 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 834 | spin_unlock_bh(&sta->lock); |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 835 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, |
| 836 | sta->sta.addr, llid, plid, reason); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 837 | break; |
| 838 | case OPN_ACPT: |
| 839 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 840 | spin_unlock_bh(&sta->lock); |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 841 | mesh_plink_frame_tx(sdata, |
| 842 | WLAN_SP_MESH_PEERING_CONFIRM, |
| 843 | sta->sta.addr, llid, plid, 0); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 844 | break; |
| 845 | case CNF_ACPT: |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 846 | del_timer(&sta->plink_timer); |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 847 | sta->plink_state = NL80211_PLINK_ESTAB; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 848 | spin_unlock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 849 | mesh_plink_inc_estab_count(sdata); |
Ashok Nagarajan | 57aac7c | 2012-04-30 14:20:30 -0700 | [diff] [blame] | 850 | changed |= mesh_set_ht_prot_mode(sdata); |
| 851 | changed |= BSS_CHANGED_BEACON; |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 852 | mpl_dbg("Mesh plink with %pM ESTABLISHED\n", |
| 853 | sta->sta.addr); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 854 | break; |
| 855 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 856 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 857 | break; |
| 858 | } |
| 859 | break; |
| 860 | |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 861 | case NL80211_PLINK_CNF_RCVD: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 862 | switch (event) { |
| 863 | case OPN_RJCT: |
| 864 | case CNF_RJCT: |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 865 | reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 866 | case CLS_ACPT: |
| 867 | if (!reason) |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 868 | reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 869 | sta->reason = reason; |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 870 | sta->plink_state = NL80211_PLINK_HOLDING; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 871 | if (!mod_plink_timer(sta, |
| 872 | dot11MeshHoldingTimeout(sdata))) |
| 873 | sta->ignore_plink_timer = true; |
| 874 | |
| 875 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 876 | spin_unlock_bh(&sta->lock); |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 877 | mesh_plink_frame_tx(sdata, |
| 878 | WLAN_SP_MESH_PEERING_CLOSE, |
| 879 | sta->sta.addr, llid, plid, reason); |
Johannes Berg | ff59dc7 | 2008-02-25 10:11:50 +0100 | [diff] [blame] | 880 | break; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 881 | case OPN_ACPT: |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 882 | del_timer(&sta->plink_timer); |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 883 | sta->plink_state = NL80211_PLINK_ESTAB; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 884 | spin_unlock_bh(&sta->lock); |
John W. Linville | c937019 | 2010-06-21 17:14:07 -0400 | [diff] [blame] | 885 | mesh_plink_inc_estab_count(sdata); |
Ashok Nagarajan | 57aac7c | 2012-04-30 14:20:30 -0700 | [diff] [blame] | 886 | changed |= mesh_set_ht_prot_mode(sdata); |
| 887 | changed |= BSS_CHANGED_BEACON; |
Johannes Berg | 0c68ae26 | 2008-10-27 15:56:10 -0700 | [diff] [blame] | 888 | mpl_dbg("Mesh plink with %pM ESTABLISHED\n", |
| 889 | sta->sta.addr); |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 890 | mesh_plink_frame_tx(sdata, |
| 891 | WLAN_SP_MESH_PEERING_CONFIRM, |
| 892 | sta->sta.addr, llid, plid, 0); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 893 | break; |
| 894 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 895 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 896 | break; |
| 897 | } |
| 898 | break; |
| 899 | |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 900 | case NL80211_PLINK_ESTAB: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 901 | switch (event) { |
| 902 | case CLS_ACPT: |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 903 | reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 904 | sta->reason = reason; |
Ashok Nagarajan | 57aac7c | 2012-04-30 14:20:30 -0700 | [diff] [blame] | 905 | __mesh_plink_deactivate(sta); |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 906 | sta->plink_state = NL80211_PLINK_HOLDING; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 907 | llid = sta->llid; |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 908 | mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 909 | spin_unlock_bh(&sta->lock); |
Ashok Nagarajan | 57aac7c | 2012-04-30 14:20:30 -0700 | [diff] [blame] | 910 | changed |= mesh_set_ht_prot_mode(sdata); |
| 911 | changed |= BSS_CHANGED_BEACON; |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 912 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, |
| 913 | sta->sta.addr, llid, plid, reason); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 914 | break; |
| 915 | case OPN_ACPT: |
| 916 | llid = sta->llid; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 917 | spin_unlock_bh(&sta->lock); |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 918 | mesh_plink_frame_tx(sdata, |
| 919 | WLAN_SP_MESH_PEERING_CONFIRM, |
| 920 | sta->sta.addr, llid, plid, 0); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 921 | break; |
| 922 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 923 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 924 | break; |
| 925 | } |
| 926 | break; |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 927 | case NL80211_PLINK_HOLDING: |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 928 | switch (event) { |
| 929 | case CLS_ACPT: |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 930 | if (del_timer(&sta->plink_timer)) |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 931 | sta->ignore_plink_timer = 1; |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 932 | mesh_plink_fsm_restart(sta); |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 933 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 934 | break; |
| 935 | case OPN_ACPT: |
| 936 | case CNF_ACPT: |
| 937 | case OPN_RJCT: |
| 938 | case CNF_RJCT: |
| 939 | llid = sta->llid; |
| 940 | reason = sta->reason; |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 941 | spin_unlock_bh(&sta->lock); |
Thomas Pedersen | 54ef656 | 2011-08-11 19:35:12 -0700 | [diff] [blame] | 942 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, |
| 943 | sta->sta.addr, llid, plid, reason); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 944 | break; |
| 945 | default: |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 946 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 947 | } |
| 948 | break; |
| 949 | default: |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 950 | /* should not get here, PLINK_BLOCKED is dealt with at the |
Daniel Mack | 3ad2f3f | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 951 | * beginning of the function |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 952 | */ |
Johannes Berg | 07346f81 | 2008-05-03 01:02:02 +0200 | [diff] [blame] | 953 | spin_unlock_bh(&sta->lock); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 954 | break; |
| 955 | } |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 956 | |
| 957 | rcu_read_unlock(); |
Ashok Nagarajan | 57aac7c | 2012-04-30 14:20:30 -0700 | [diff] [blame] | 958 | |
| 959 | if (changed) |
| 960 | ieee80211_bss_info_change_notify(sdata, changed); |
Luis Carlos Cobo | c3896d2c | 2008-02-23 15:17:13 +0100 | [diff] [blame] | 961 | } |