Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +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 | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 3 | * Authors: Luis Carlos Cobo <luisca@cozybit.com> |
| 4 | * Javier Cardona <javier@cozybit.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 11 | #include <linux/slab.h> |
Luis Carlos Cobo | 51cedda | 2008-04-23 12:15:29 -0700 | [diff] [blame] | 12 | #include <asm/unaligned.h> |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 13 | #include "ieee80211_i.h" |
| 14 | #include "mesh.h" |
| 15 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 16 | #define TMR_RUNNING_HK 0 |
| 17 | #define TMR_RUNNING_MP 1 |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 18 | #define TMR_RUNNING_MPR 2 |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 19 | |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 20 | int mesh_allocated; |
| 21 | static struct kmem_cache *rm_cache; |
| 22 | |
Thomas Pedersen | 25d49e4 | 2011-08-11 19:35:15 -0700 | [diff] [blame] | 23 | #ifdef CONFIG_MAC80211_MESH |
| 24 | bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) |
| 25 | { |
| 26 | return (mgmt->u.action.u.mesh_action.action_code == |
| 27 | WLAN_MESH_ACTION_HWMP_PATH_SELECTION); |
| 28 | } |
| 29 | #else |
| 30 | bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) |
| 31 | { return false; } |
| 32 | #endif |
| 33 | |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 34 | void ieee80211s_init(void) |
| 35 | { |
| 36 | mesh_pathtbl_init(); |
| 37 | mesh_allocated = 1; |
| 38 | rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), |
| 39 | 0, 0, NULL); |
| 40 | } |
| 41 | |
| 42 | void ieee80211s_stop(void) |
| 43 | { |
| 44 | mesh_pathtbl_unregister(); |
| 45 | kmem_cache_destroy(rm_cache); |
| 46 | } |
| 47 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 48 | static void ieee80211_mesh_housekeeping_timer(unsigned long data) |
| 49 | { |
| 50 | struct ieee80211_sub_if_data *sdata = (void *) data; |
| 51 | struct ieee80211_local *local = sdata->local; |
| 52 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 53 | |
Rui Paulo | 6b9ac44 | 2009-10-20 21:21:48 +0100 | [diff] [blame] | 54 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 55 | |
| 56 | if (local->quiescing) { |
| 57 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); |
| 58 | return; |
| 59 | } |
| 60 | |
Johannes Berg | 64592c8 | 2010-06-10 10:21:31 +0200 | [diff] [blame] | 61 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 62 | } |
| 63 | |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 64 | /** |
| 65 | * mesh_matches_local - check if the config of a mesh point matches ours |
| 66 | * |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 67 | * @sdata: local mesh subif |
Thomas Pedersen | f743ff4 | 2012-04-18 19:23:43 -0700 | [diff] [blame] | 68 | * @ie: information elements of a management frame from the mesh peer |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 69 | * |
| 70 | * This function checks if the mesh configuration of a mesh point matches the |
| 71 | * local mesh configuration, i.e. if both nodes belong to the same mesh network. |
| 72 | */ |
Thomas Pedersen | f743ff4 | 2012-04-18 19:23:43 -0700 | [diff] [blame] | 73 | bool mesh_matches_local(struct ieee80211_sub_if_data *sdata, |
| 74 | struct ieee802_11_elems *ie) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 75 | { |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 76 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
Thomas Pedersen | 739522b | 2011-10-26 14:47:28 -0700 | [diff] [blame] | 77 | struct ieee80211_local *local = sdata->local; |
Thomas Pedersen | f743ff4 | 2012-04-18 19:23:43 -0700 | [diff] [blame] | 78 | u32 basic_rates = 0; |
Ashok Nagarajan | b91e64a | 2012-04-30 14:20:31 -0700 | [diff] [blame] | 79 | enum nl80211_channel_type sta_channel_type = NL80211_CHAN_NO_HT; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 80 | |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 81 | /* |
| 82 | * As support for each feature is added, check for matching |
| 83 | * - On mesh config capabilities |
| 84 | * - Power Save Support En |
| 85 | * - Sync support enabled |
| 86 | * - Sync support active |
| 87 | * - Sync support required from peer |
| 88 | * - MDA enabled |
| 89 | * - Power management control on fc |
| 90 | */ |
Thomas Pedersen | 739522b | 2011-10-26 14:47:28 -0700 | [diff] [blame] | 91 | if (!(ifmsh->mesh_id_len == ie->mesh_id_len && |
| 92 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && |
| 93 | (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && |
| 94 | (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && |
| 95 | (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && |
| 96 | (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && |
| 97 | (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))) |
| 98 | goto mismatch; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 99 | |
Thomas Pedersen | f743ff4 | 2012-04-18 19:23:43 -0700 | [diff] [blame] | 100 | ieee80211_sta_get_rates(local, ie, local->oper_channel->band, |
| 101 | &basic_rates); |
| 102 | |
Ashok Nagarajan | fe40cb6 | 2012-04-02 21:21:22 -0700 | [diff] [blame] | 103 | if (sdata->vif.bss_conf.basic_rates != basic_rates) |
| 104 | goto mismatch; |
| 105 | |
Ashok Nagarajan | b91e64a | 2012-04-30 14:20:31 -0700 | [diff] [blame] | 106 | if (ie->ht_operation) |
| 107 | sta_channel_type = |
| 108 | ieee80211_ht_oper_to_channel_type(ie->ht_operation); |
| 109 | |
| 110 | /* Disallow HT40+/- mismatch */ |
Johannes Berg | 074d46d | 2012-03-15 19:45:16 +0100 | [diff] [blame] | 111 | if (ie->ht_operation && |
Ashok Nagarajan | 0e482db | 2012-05-07 21:00:30 -0700 | [diff] [blame] | 112 | (local->_oper_channel_type == NL80211_CHAN_HT40MINUS || |
| 113 | local->_oper_channel_type == NL80211_CHAN_HT40PLUS) && |
| 114 | (sta_channel_type == NL80211_CHAN_HT40MINUS || |
| 115 | sta_channel_type == NL80211_CHAN_HT40PLUS) && |
Ashok Nagarajan | b91e64a | 2012-04-30 14:20:31 -0700 | [diff] [blame] | 116 | local->_oper_channel_type != sta_channel_type) |
Thomas Pedersen | 739522b | 2011-10-26 14:47:28 -0700 | [diff] [blame] | 117 | goto mismatch; |
| 118 | |
| 119 | return true; |
| 120 | mismatch: |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 121 | return false; |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links |
| 126 | * |
| 127 | * @ie: information elements of a management frame from the mesh peer |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 128 | */ |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 129 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 130 | { |
Rui Paulo | 136cfa2 | 2009-11-18 18:40:00 +0000 | [diff] [blame] | 131 | return (ie->mesh_config->meshconf_cap & |
Rui Paulo | 3491707 | 2009-11-09 23:46:39 +0000 | [diff] [blame] | 132 | MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | /** |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 136 | * mesh_accept_plinks_update - update accepting_plink in local mesh beacons |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 137 | * |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 138 | * @sdata: mesh interface in which mesh beacons are going to be updated |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 139 | */ |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 140 | void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 141 | { |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 142 | bool free_plinks; |
| 143 | |
| 144 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, |
| 145 | * the mesh interface might be able to establish plinks with peers that |
Luis Carlos Cobo | b4e08ea | 2008-02-29 15:46:08 -0800 | [diff] [blame] | 146 | * are already on the table but are not on PLINK_ESTAB state. However, |
| 147 | * in general the mesh interface is not accepting peer link requests |
| 148 | * from new peers, and that must be reflected in the beacon |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 149 | */ |
| 150 | free_plinks = mesh_plink_availables(sdata); |
| 151 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 152 | if (free_plinks != sdata->u.mesh.accepting_plinks) |
| 153 | ieee80211_mesh_housekeeping_timer((unsigned long) sdata); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 154 | } |
| 155 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 156 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 157 | { |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 158 | int i; |
| 159 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 160 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
| 161 | if (!sdata->u.mesh.rmc) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 162 | return -ENOMEM; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 163 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 164 | for (i = 0; i < RMC_BUCKETS; i++) |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 165 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i].list); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 166 | return 0; |
| 167 | } |
| 168 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 169 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 170 | { |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 171 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 172 | struct rmc_entry *p, *n; |
| 173 | int i; |
| 174 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 175 | if (!sdata->u.mesh.rmc) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 176 | return; |
| 177 | |
| 178 | for (i = 0; i < RMC_BUCKETS; i++) |
| 179 | list_for_each_entry_safe(p, n, &rmc->bucket[i].list, list) { |
| 180 | list_del(&p->list); |
| 181 | kmem_cache_free(rm_cache, p); |
| 182 | } |
| 183 | |
| 184 | kfree(rmc); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 185 | sdata->u.mesh.rmc = NULL; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | /** |
| 189 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. |
| 190 | * |
| 191 | * @sa: source address |
| 192 | * @mesh_hdr: mesh_header |
| 193 | * |
| 194 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. |
| 195 | * |
| 196 | * Checks using the source address and the mesh sequence number if we have |
| 197 | * received this frame lately. If the frame is not in the cache, it is added to |
| 198 | * it. |
| 199 | */ |
| 200 | int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr, |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 201 | struct ieee80211_sub_if_data *sdata) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 202 | { |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 203 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 204 | u32 seqnum = 0; |
| 205 | int entries = 0; |
| 206 | u8 idx; |
| 207 | struct rmc_entry *p, *n; |
| 208 | |
| 209 | /* Don't care about endianness since only match matters */ |
Luis Carlos Cobo | 51cedda | 2008-04-23 12:15:29 -0700 | [diff] [blame] | 210 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
| 211 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 212 | list_for_each_entry_safe(p, n, &rmc->bucket[idx].list, list) { |
| 213 | ++entries; |
| 214 | if (time_after(jiffies, p->exp_time) || |
| 215 | (entries == RMC_QUEUE_MAX_LEN)) { |
| 216 | list_del(&p->list); |
| 217 | kmem_cache_free(rm_cache, p); |
| 218 | --entries; |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 219 | } else if ((seqnum == p->seqnum) && |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 220 | (ether_addr_equal(sa, p->sa))) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 221 | return -1; |
| 222 | } |
| 223 | |
| 224 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 225 | if (!p) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 226 | return 0; |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 227 | |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 228 | p->seqnum = seqnum; |
| 229 | p->exp_time = jiffies + RMC_TIMEOUT; |
| 230 | memcpy(p->sa, sa, ETH_ALEN); |
| 231 | list_add(&p->list, &rmc->bucket[idx].list); |
| 232 | return 0; |
| 233 | } |
| 234 | |
Thomas Pedersen | 082ebb0 | 2011-08-11 19:35:10 -0700 | [diff] [blame] | 235 | int |
| 236 | mesh_add_meshconf_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) |
| 237 | { |
| 238 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 239 | u8 *pos, neighbors; |
| 240 | u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); |
| 241 | |
| 242 | if (skb_tailroom(skb) < 2 + meshconf_len) |
| 243 | return -ENOMEM; |
| 244 | |
| 245 | pos = skb_put(skb, 2 + meshconf_len); |
| 246 | *pos++ = WLAN_EID_MESH_CONFIG; |
| 247 | *pos++ = meshconf_len; |
| 248 | |
| 249 | /* Active path selection protocol ID */ |
| 250 | *pos++ = ifmsh->mesh_pp_id; |
| 251 | /* Active path selection metric ID */ |
| 252 | *pos++ = ifmsh->mesh_pm_id; |
| 253 | /* Congestion control mode identifier */ |
| 254 | *pos++ = ifmsh->mesh_cc_id; |
| 255 | /* Synchronization protocol identifier */ |
| 256 | *pos++ = ifmsh->mesh_sp_id; |
| 257 | /* Authentication Protocol identifier */ |
| 258 | *pos++ = ifmsh->mesh_auth_id; |
| 259 | /* Mesh Formation Info - number of neighbors */ |
| 260 | neighbors = atomic_read(&ifmsh->mshstats.estab_plinks); |
| 261 | /* Number of neighbor mesh STAs or 15 whichever is smaller */ |
| 262 | neighbors = (neighbors > 15) ? 15 : neighbors; |
| 263 | *pos++ = neighbors << 1; |
| 264 | /* Mesh capability */ |
| 265 | ifmsh->accepting_plinks = mesh_plink_availables(sdata); |
| 266 | *pos = MESHCONF_CAPAB_FORWARDING; |
Javier Cardona | dbf498f | 2012-03-31 11:31:32 -0700 | [diff] [blame] | 267 | *pos |= ifmsh->accepting_plinks ? |
Thomas Pedersen | 082ebb0 | 2011-08-11 19:35:10 -0700 | [diff] [blame] | 268 | MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; |
Javier Cardona | dbf498f | 2012-03-31 11:31:32 -0700 | [diff] [blame] | 269 | *pos++ |= ifmsh->adjusting_tbtt ? |
| 270 | MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00; |
Thomas Pedersen | 082ebb0 | 2011-08-11 19:35:10 -0700 | [diff] [blame] | 271 | *pos++ = 0x00; |
| 272 | |
| 273 | return 0; |
| 274 | } |
| 275 | |
| 276 | int |
| 277 | mesh_add_meshid_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) |
| 278 | { |
| 279 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 280 | u8 *pos; |
| 281 | |
| 282 | if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) |
| 283 | return -ENOMEM; |
| 284 | |
| 285 | pos = skb_put(skb, 2 + ifmsh->mesh_id_len); |
| 286 | *pos++ = WLAN_EID_MESH_ID; |
| 287 | *pos++ = ifmsh->mesh_id_len; |
| 288 | if (ifmsh->mesh_id_len) |
| 289 | memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); |
| 290 | |
| 291 | return 0; |
| 292 | } |
| 293 | |
| 294 | int |
| 295 | mesh_add_vendor_ies(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) |
| 296 | { |
| 297 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 298 | u8 offset, len; |
| 299 | const u8 *data; |
| 300 | |
| 301 | if (!ifmsh->ie || !ifmsh->ie_len) |
| 302 | return 0; |
| 303 | |
| 304 | /* fast-forward to vendor IEs */ |
| 305 | offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); |
| 306 | |
| 307 | if (offset) { |
| 308 | len = ifmsh->ie_len - offset; |
| 309 | data = ifmsh->ie + offset; |
| 310 | if (skb_tailroom(skb) < len) |
| 311 | return -ENOMEM; |
| 312 | memcpy(skb_put(skb, len), data, len); |
| 313 | } |
| 314 | |
| 315 | return 0; |
| 316 | } |
| 317 | |
| 318 | int |
| 319 | mesh_add_rsn_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) |
| 320 | { |
| 321 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 322 | u8 len = 0; |
| 323 | const u8 *data; |
| 324 | |
| 325 | if (!ifmsh->ie || !ifmsh->ie_len) |
| 326 | return 0; |
| 327 | |
| 328 | /* find RSN IE */ |
| 329 | data = ifmsh->ie; |
| 330 | while (data < ifmsh->ie + ifmsh->ie_len) { |
| 331 | if (*data == WLAN_EID_RSN) { |
| 332 | len = data[1] + 2; |
| 333 | break; |
| 334 | } |
| 335 | data++; |
| 336 | } |
| 337 | |
| 338 | if (len) { |
| 339 | if (skb_tailroom(skb) < len) |
| 340 | return -ENOMEM; |
| 341 | memcpy(skb_put(skb, len), data, len); |
| 342 | } |
| 343 | |
| 344 | return 0; |
| 345 | } |
| 346 | |
Thomas Pedersen | 082ebb0 | 2011-08-11 19:35:10 -0700 | [diff] [blame] | 347 | int mesh_add_ds_params_ie(struct sk_buff *skb, |
| 348 | struct ieee80211_sub_if_data *sdata) |
| 349 | { |
| 350 | struct ieee80211_local *local = sdata->local; |
| 351 | struct ieee80211_supported_band *sband; |
| 352 | u8 *pos; |
| 353 | |
| 354 | if (skb_tailroom(skb) < 3) |
| 355 | return -ENOMEM; |
| 356 | |
| 357 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
Rui Paulo | be125c6 | 2009-11-09 23:46:54 +0000 | [diff] [blame] | 358 | if (sband->band == IEEE80211_BAND_2GHZ) { |
| 359 | pos = skb_put(skb, 2 + 1); |
| 360 | *pos++ = WLAN_EID_DS_PARAMS; |
| 361 | *pos++ = 1; |
| 362 | *pos++ = ieee80211_frequency_to_channel(local->hw.conf.channel->center_freq); |
| 363 | } |
| 364 | |
Thomas Pedersen | 082ebb0 | 2011-08-11 19:35:10 -0700 | [diff] [blame] | 365 | return 0; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 366 | } |
| 367 | |
Thomas Pedersen | 176f360 | 2011-10-26 14:47:27 -0700 | [diff] [blame] | 368 | int mesh_add_ht_cap_ie(struct sk_buff *skb, |
| 369 | struct ieee80211_sub_if_data *sdata) |
| 370 | { |
| 371 | struct ieee80211_local *local = sdata->local; |
| 372 | struct ieee80211_supported_band *sband; |
| 373 | u8 *pos; |
| 374 | |
| 375 | sband = local->hw.wiphy->bands[local->oper_channel->band]; |
| 376 | if (!sband->ht_cap.ht_supported || |
| 377 | local->_oper_channel_type == NL80211_CHAN_NO_HT) |
| 378 | return 0; |
| 379 | |
| 380 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) |
| 381 | return -ENOMEM; |
| 382 | |
| 383 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 384 | ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); |
Thomas Pedersen | 176f360 | 2011-10-26 14:47:27 -0700 | [diff] [blame] | 385 | |
| 386 | return 0; |
| 387 | } |
| 388 | |
Johannes Berg | 074d46d | 2012-03-15 19:45:16 +0100 | [diff] [blame] | 389 | int mesh_add_ht_oper_ie(struct sk_buff *skb, |
Thomas Pedersen | 176f360 | 2011-10-26 14:47:27 -0700 | [diff] [blame] | 390 | struct ieee80211_sub_if_data *sdata) |
| 391 | { |
| 392 | struct ieee80211_local *local = sdata->local; |
| 393 | struct ieee80211_channel *channel = local->oper_channel; |
| 394 | enum nl80211_channel_type channel_type = local->_oper_channel_type; |
| 395 | struct ieee80211_supported_band *sband = |
| 396 | local->hw.wiphy->bands[channel->band]; |
| 397 | struct ieee80211_sta_ht_cap *ht_cap = &sband->ht_cap; |
| 398 | u8 *pos; |
| 399 | |
| 400 | if (!ht_cap->ht_supported || channel_type == NL80211_CHAN_NO_HT) |
| 401 | return 0; |
| 402 | |
Johannes Berg | 074d46d | 2012-03-15 19:45:16 +0100 | [diff] [blame] | 403 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) |
Thomas Pedersen | 176f360 | 2011-10-26 14:47:27 -0700 | [diff] [blame] | 404 | return -ENOMEM; |
| 405 | |
Johannes Berg | 074d46d | 2012-03-15 19:45:16 +0100 | [diff] [blame] | 406 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
Ashok Nagarajan | 431e315 | 2012-04-30 14:20:29 -0700 | [diff] [blame] | 407 | ieee80211_ie_build_ht_oper(pos, ht_cap, channel, channel_type, |
| 408 | sdata->vif.bss_conf.ht_operation_mode); |
Thomas Pedersen | 176f360 | 2011-10-26 14:47:27 -0700 | [diff] [blame] | 409 | |
| 410 | return 0; |
| 411 | } |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 412 | static void ieee80211_mesh_path_timer(unsigned long data) |
| 413 | { |
| 414 | struct ieee80211_sub_if_data *sdata = |
| 415 | (struct ieee80211_sub_if_data *) data; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 416 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
Johannes Berg | 133b822 | 2008-09-16 14:18:59 +0200 | [diff] [blame] | 417 | struct ieee80211_local *local = sdata->local; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 418 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 419 | if (local->quiescing) { |
| 420 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); |
| 421 | return; |
| 422 | } |
| 423 | |
Johannes Berg | 64592c8 | 2010-06-10 10:21:31 +0200 | [diff] [blame] | 424 | ieee80211_queue_work(&local->hw, &sdata->work); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 425 | } |
| 426 | |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 427 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
| 428 | { |
| 429 | struct ieee80211_sub_if_data *sdata = |
| 430 | (struct ieee80211_sub_if_data *) data; |
| 431 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 432 | struct ieee80211_local *local = sdata->local; |
| 433 | |
| 434 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
| 435 | |
| 436 | if (local->quiescing) { |
| 437 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); |
| 438 | return; |
| 439 | } |
| 440 | |
Johannes Berg | 64592c8 | 2010-06-10 10:21:31 +0200 | [diff] [blame] | 441 | ieee80211_queue_work(&local->hw, &sdata->work); |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 442 | } |
| 443 | |
Rui Paulo | 63c5723 | 2009-11-09 23:46:57 +0000 | [diff] [blame] | 444 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
| 445 | { |
Chun-Yeow Yeoh | dbb912c | 2012-06-14 02:06:09 +0800 | [diff] [blame] | 446 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) |
Rui Paulo | 63c5723 | 2009-11-09 23:46:57 +0000 | [diff] [blame] | 447 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
| 448 | else { |
| 449 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
| 450 | /* stop running timer */ |
| 451 | del_timer_sync(&ifmsh->mesh_path_root_timer); |
| 452 | } |
| 453 | } |
| 454 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 455 | /** |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 456 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame |
| 457 | * @hdr: 802.11 frame header |
| 458 | * @fc: frame control field |
| 459 | * @meshda: destination address in the mesh |
| 460 | * @meshsa: source address address in the mesh. Same as TA, as frame is |
| 461 | * locally originated. |
| 462 | * |
| 463 | * Return the length of the 802.11 (does not include a mesh control header) |
| 464 | */ |
Johannes Berg | 15ff636 | 2009-11-17 13:34:04 +0100 | [diff] [blame] | 465 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
| 466 | const u8 *meshda, const u8 *meshsa) |
| 467 | { |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 468 | if (is_multicast_ether_addr(meshda)) { |
| 469 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
| 470 | /* DA TA SA */ |
| 471 | memcpy(hdr->addr1, meshda, ETH_ALEN); |
| 472 | memcpy(hdr->addr2, meshsa, ETH_ALEN); |
| 473 | memcpy(hdr->addr3, meshsa, ETH_ALEN); |
| 474 | return 24; |
| 475 | } else { |
Javier Cardona | 2154c81 | 2011-09-07 17:49:53 -0700 | [diff] [blame] | 476 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 477 | /* RA TA DA SA */ |
| 478 | memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ |
| 479 | memcpy(hdr->addr2, meshsa, ETH_ALEN); |
| 480 | memcpy(hdr->addr3, meshda, ETH_ALEN); |
| 481 | memcpy(hdr->addr4, meshsa, ETH_ALEN); |
| 482 | return 30; |
| 483 | } |
| 484 | } |
| 485 | |
| 486 | /** |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 487 | * ieee80211_new_mesh_header - create a new mesh header |
| 488 | * @meshhdr: uninitialized mesh header |
| 489 | * @sdata: mesh interface to be used |
Javier Cardona | 61ad539 | 2010-12-16 17:23:34 -0800 | [diff] [blame] | 490 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
| 491 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may |
| 492 | * be NULL. |
| 493 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the |
| 494 | * mesh frame |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 495 | * |
| 496 | * Return the header length. |
| 497 | */ |
| 498 | int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr, |
Javier Cardona | 61ad539 | 2010-12-16 17:23:34 -0800 | [diff] [blame] | 499 | struct ieee80211_sub_if_data *sdata, char *addr4or5, |
| 500 | char *addr6) |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 501 | { |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 502 | int aelen = 0; |
Javier Cardona | 61ad539 | 2010-12-16 17:23:34 -0800 | [diff] [blame] | 503 | BUG_ON(!addr4or5 && addr6); |
Julia Lawall | 0c3cee7 | 2009-12-09 20:25:59 +0100 | [diff] [blame] | 504 | memset(meshhdr, 0, sizeof(*meshhdr)); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 505 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
| 506 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); |
| 507 | sdata->u.mesh.mesh_seqnum++; |
Javier Cardona | 61ad539 | 2010-12-16 17:23:34 -0800 | [diff] [blame] | 508 | if (addr4or5 && !addr6) { |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 509 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
| 510 | aelen += ETH_ALEN; |
Javier Cardona | 61ad539 | 2010-12-16 17:23:34 -0800 | [diff] [blame] | 511 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
| 512 | } else if (addr4or5 && addr6) { |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 513 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
| 514 | aelen += 2 * ETH_ALEN; |
Javier Cardona | 61ad539 | 2010-12-16 17:23:34 -0800 | [diff] [blame] | 515 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
| 516 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 517 | } |
| 518 | return 6 + aelen; |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 519 | } |
| 520 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 521 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
| 522 | struct ieee80211_if_mesh *ifmsh) |
| 523 | { |
| 524 | bool free_plinks; |
| 525 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 526 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); |
| 527 | mesh_path_expire(sdata); |
| 528 | |
| 529 | free_plinks = mesh_plink_availables(sdata); |
| 530 | if (free_plinks != sdata->u.mesh.accepting_plinks) |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 531 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 532 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 533 | mod_timer(&ifmsh->housekeeping_timer, |
| 534 | round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); |
| 535 | } |
| 536 | |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 537 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
| 538 | { |
| 539 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
Chun-Yeow Yeoh | a69cc44 | 2012-06-14 02:06:07 +0800 | [diff] [blame] | 540 | u32 interval; |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 541 | |
| 542 | mesh_path_tx_root_frame(sdata); |
Chun-Yeow Yeoh | a69cc44 | 2012-06-14 02:06:07 +0800 | [diff] [blame] | 543 | |
| 544 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) |
| 545 | interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; |
| 546 | else |
| 547 | interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; |
| 548 | |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 549 | mod_timer(&ifmsh->mesh_path_root_timer, |
Chun-Yeow Yeoh | a69cc44 | 2012-06-14 02:06:07 +0800 | [diff] [blame] | 550 | round_jiffies(TU_TO_EXP_TIME(interval))); |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 551 | } |
| 552 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 553 | #ifdef CONFIG_PM |
| 554 | void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata) |
| 555 | { |
| 556 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 557 | |
Javier Cardona | 5ee68e5 | 2011-08-09 16:45:08 -0700 | [diff] [blame] | 558 | /* use atomic bitops in case all timers fire at the same time */ |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 559 | |
| 560 | if (del_timer_sync(&ifmsh->housekeeping_timer)) |
| 561 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); |
| 562 | if (del_timer_sync(&ifmsh->mesh_path_timer)) |
| 563 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 564 | if (del_timer_sync(&ifmsh->mesh_path_root_timer)) |
| 565 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 566 | } |
| 567 | |
| 568 | void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata) |
| 569 | { |
| 570 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 571 | |
| 572 | if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running)) |
| 573 | add_timer(&ifmsh->housekeeping_timer); |
| 574 | if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running)) |
| 575 | add_timer(&ifmsh->mesh_path_timer); |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 576 | if (test_and_clear_bit(TMR_RUNNING_MPR, &ifmsh->timers_running)) |
| 577 | add_timer(&ifmsh->mesh_path_root_timer); |
Rui Paulo | 63c5723 | 2009-11-09 23:46:57 +0000 | [diff] [blame] | 578 | ieee80211_mesh_root_setup(ifmsh); |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 579 | } |
| 580 | #endif |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 581 | |
| 582 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) |
| 583 | { |
| 584 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 585 | struct ieee80211_local *local = sdata->local; |
| 586 | |
Johannes Berg | 09b1747 | 2010-12-03 09:20:41 +0100 | [diff] [blame] | 587 | local->fif_other_bss++; |
| 588 | /* mesh ifaces must set allmulti to forward mcast traffic */ |
| 589 | atomic_inc(&local->iff_allmultis); |
| 590 | ieee80211_configure_filter(local); |
| 591 | |
Javier Cardona | c7108a7 | 2010-12-16 17:37:50 -0800 | [diff] [blame] | 592 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
Javier Cardona | c7108a7 | 2010-12-16 17:37:50 -0800 | [diff] [blame] | 593 | ifmsh->mesh_auth_id = 0; /* Disabled */ |
Javier Cardona | dbf498f | 2012-03-31 11:31:32 -0700 | [diff] [blame] | 594 | /* register sync ops from extensible synchronization framework */ |
| 595 | ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); |
| 596 | ifmsh->adjusting_tbtt = false; |
| 597 | ifmsh->sync_offset_clockdrift_max = 0; |
Rui Paulo | 6b9ac44 | 2009-10-20 21:21:48 +0100 | [diff] [blame] | 598 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
Rui Paulo | 63c5723 | 2009-11-09 23:46:57 +0000 | [diff] [blame] | 599 | ieee80211_mesh_root_setup(ifmsh); |
Johannes Berg | 64592c8 | 2010-06-10 10:21:31 +0200 | [diff] [blame] | 600 | ieee80211_queue_work(&local->hw, &sdata->work); |
Ashok Nagarajan | 70c33ea | 2012-04-30 14:20:32 -0700 | [diff] [blame] | 601 | sdata->vif.bss_conf.ht_operation_mode = |
| 602 | ifmsh->mshcfg.ht_opmode; |
Javier Cardona | 5b36583 | 2009-08-10 12:15:51 -0700 | [diff] [blame] | 603 | sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL; |
Ashok Nagarajan | d934f7d | 2012-04-02 21:21:19 -0700 | [diff] [blame] | 604 | sdata->vif.bss_conf.basic_rates = |
| 605 | ieee80211_mandatory_rates(sdata->local, |
| 606 | sdata->local->hw.conf.channel->band); |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 607 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON | |
Javier Cardona | 5b36583 | 2009-08-10 12:15:51 -0700 | [diff] [blame] | 608 | BSS_CHANGED_BEACON_ENABLED | |
Ashok Nagarajan | 70c33ea | 2012-04-30 14:20:32 -0700 | [diff] [blame] | 609 | BSS_CHANGED_HT | |
Ashok Nagarajan | d934f7d | 2012-04-02 21:21:19 -0700 | [diff] [blame] | 610 | BSS_CHANGED_BASIC_RATES | |
Javier Cardona | 5b36583 | 2009-08-10 12:15:51 -0700 | [diff] [blame] | 611 | BSS_CHANGED_BEACON_INT); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 612 | } |
| 613 | |
| 614 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) |
| 615 | { |
Johannes Berg | 09b1747 | 2010-12-03 09:20:41 +0100 | [diff] [blame] | 616 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 29cbe68 | 2010-12-03 09:20:44 +0100 | [diff] [blame] | 617 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 618 | |
| 619 | ifmsh->mesh_id_len = 0; |
| 620 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); |
| 621 | sta_info_flush(local, NULL); |
Johannes Berg | 09b1747 | 2010-12-03 09:20:41 +0100 | [diff] [blame] | 622 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 623 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 624 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
Johannes Berg | dd4c926 | 2012-08-01 21:03:21 +0200 | [diff] [blame] | 625 | del_timer_sync(&sdata->u.mesh.mesh_path_timer); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 626 | /* |
Johannes Berg | b741343 | 2008-09-11 00:01:50 +0200 | [diff] [blame] | 627 | * If the timer fired while we waited for it, it will have |
| 628 | * requeued the work. Now the work will be running again |
| 629 | * but will not rearm the timer again because it checks |
| 630 | * whether the interface is running, which, at this point, |
| 631 | * it no longer is. |
| 632 | */ |
Johannes Berg | 64592c8 | 2010-06-10 10:21:31 +0200 | [diff] [blame] | 633 | cancel_work_sync(&sdata->work); |
Johannes Berg | 09b1747 | 2010-12-03 09:20:41 +0100 | [diff] [blame] | 634 | |
| 635 | local->fif_other_bss--; |
| 636 | atomic_dec(&local->iff_allmultis); |
| 637 | ieee80211_configure_filter(local); |
Johannes Berg | 2d9957c | 2012-08-01 20:54:52 +0200 | [diff] [blame] | 638 | |
| 639 | sdata->u.mesh.timers_running = 0; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 640 | } |
| 641 | |
| 642 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, |
| 643 | u16 stype, |
| 644 | struct ieee80211_mgmt *mgmt, |
| 645 | size_t len, |
| 646 | struct ieee80211_rx_status *rx_status) |
| 647 | { |
Johannes Berg | c6a1fa1 | 2008-10-07 12:04:32 +0200 | [diff] [blame] | 648 | struct ieee80211_local *local = sdata->local; |
Javier Cardona | dbf498f | 2012-03-31 11:31:32 -0700 | [diff] [blame] | 649 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 650 | struct ieee802_11_elems elems; |
| 651 | struct ieee80211_channel *channel; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 652 | size_t baselen; |
| 653 | int freq; |
| 654 | enum ieee80211_band band = rx_status->band; |
| 655 | |
| 656 | /* ignore ProbeResp to foreign address */ |
| 657 | if (stype == IEEE80211_STYPE_PROBE_RESP && |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 658 | !ether_addr_equal(mgmt->da, sdata->vif.addr)) |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 659 | return; |
| 660 | |
| 661 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
| 662 | if (baselen > len) |
| 663 | return; |
| 664 | |
| 665 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, |
| 666 | &elems); |
| 667 | |
Javier Cardona | 5cff5e0 | 2011-04-07 15:08:29 -0700 | [diff] [blame] | 668 | /* ignore beacons from secure mesh peers if our security is off */ |
Javier Cardona | b130e5c | 2011-05-03 16:57:07 -0700 | [diff] [blame] | 669 | if (elems.rsn_len && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) |
Javier Cardona | 5cff5e0 | 2011-04-07 15:08:29 -0700 | [diff] [blame] | 670 | return; |
| 671 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 672 | if (elems.ds_params && elems.ds_params_len == 1) |
Bruno Randolf | 59eb21a | 2011-01-17 13:37:28 +0900 | [diff] [blame] | 673 | freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 674 | else |
| 675 | freq = rx_status->freq; |
| 676 | |
| 677 | channel = ieee80211_get_channel(local->hw.wiphy, freq); |
| 678 | |
| 679 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) |
| 680 | return; |
| 681 | |
| 682 | if (elems.mesh_id && elems.mesh_config && |
Thomas Pedersen | f743ff4 | 2012-04-18 19:23:43 -0700 | [diff] [blame] | 683 | mesh_matches_local(sdata, &elems)) |
| 684 | mesh_neighbour_update(sdata, mgmt->sa, &elems); |
Javier Cardona | dbf498f | 2012-03-31 11:31:32 -0700 | [diff] [blame] | 685 | |
| 686 | if (ifmsh->sync_ops) |
| 687 | ifmsh->sync_ops->rx_bcn_presp(sdata, |
| 688 | stype, mgmt, &elems, rx_status); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 689 | } |
| 690 | |
| 691 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, |
| 692 | struct ieee80211_mgmt *mgmt, |
| 693 | size_t len, |
| 694 | struct ieee80211_rx_status *rx_status) |
| 695 | { |
| 696 | switch (mgmt->u.action.category) { |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 697 | case WLAN_CATEGORY_SELF_PROTECTED: |
| 698 | switch (mgmt->u.action.u.self_prot.action_code) { |
| 699 | case WLAN_SP_MESH_PEERING_OPEN: |
| 700 | case WLAN_SP_MESH_PEERING_CLOSE: |
| 701 | case WLAN_SP_MESH_PEERING_CONFIRM: |
| 702 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); |
| 703 | break; |
| 704 | } |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 705 | break; |
Thomas Pedersen | 25d49e4 | 2011-08-11 19:35:15 -0700 | [diff] [blame] | 706 | case WLAN_CATEGORY_MESH_ACTION: |
| 707 | if (mesh_action_is_path_sel(mgmt)) |
| 708 | mesh_rx_path_sel_frame(sdata, mgmt, len); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 709 | break; |
| 710 | } |
| 711 | } |
| 712 | |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 713 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
| 714 | struct sk_buff *skb) |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 715 | { |
| 716 | struct ieee80211_rx_status *rx_status; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 717 | struct ieee80211_mgmt *mgmt; |
| 718 | u16 stype; |
| 719 | |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 720 | rx_status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 721 | mgmt = (struct ieee80211_mgmt *) skb->data; |
| 722 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; |
| 723 | |
| 724 | switch (stype) { |
| 725 | case IEEE80211_STYPE_PROBE_RESP: |
| 726 | case IEEE80211_STYPE_BEACON: |
| 727 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, |
| 728 | rx_status); |
| 729 | break; |
| 730 | case IEEE80211_STYPE_ACTION: |
| 731 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); |
| 732 | break; |
| 733 | } |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 734 | } |
| 735 | |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 736 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 737 | { |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 738 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 739 | |
| 740 | if (ifmsh->preq_queue_len && |
| 741 | time_after(jiffies, |
| 742 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) |
| 743 | mesh_path_start_discovery(sdata); |
| 744 | |
Javier Cardona | 1888923 | 2009-08-10 12:15:52 -0700 | [diff] [blame] | 745 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
| 746 | mesh_mpath_table_grow(); |
| 747 | |
Nick Ledovskikh | dcac908 | 2011-01-11 14:35:12 +0000 | [diff] [blame] | 748 | if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE, &ifmsh->wrkq_flags)) |
Javier Cardona | 1888923 | 2009-08-10 12:15:52 -0700 | [diff] [blame] | 749 | mesh_mpp_table_grow(); |
| 750 | |
| 751 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 752 | ieee80211_mesh_housekeeping(sdata, ifmsh); |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 753 | |
| 754 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) |
| 755 | ieee80211_mesh_rootpath(sdata); |
Javier Cardona | dbf498f | 2012-03-31 11:31:32 -0700 | [diff] [blame] | 756 | |
| 757 | if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) |
| 758 | mesh_sync_adjust_tbtt(sdata); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 759 | } |
| 760 | |
| 761 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) |
| 762 | { |
| 763 | struct ieee80211_sub_if_data *sdata; |
| 764 | |
| 765 | rcu_read_lock(); |
| 766 | list_for_each_entry_rcu(sdata, &local->interfaces, list) |
| 767 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
Johannes Berg | 64592c8 | 2010-06-10 10:21:31 +0200 | [diff] [blame] | 768 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 769 | rcu_read_unlock(); |
| 770 | } |
| 771 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 772 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
| 773 | { |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 774 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 775 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 776 | setup_timer(&ifmsh->housekeeping_timer, |
| 777 | ieee80211_mesh_housekeeping_timer, |
| 778 | (unsigned long) sdata); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 779 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 780 | ifmsh->accepting_plinks = true; |
| 781 | ifmsh->preq_id = 0; |
Rui Paulo | d19b3bf | 2009-11-09 23:46:55 +0000 | [diff] [blame] | 782 | ifmsh->sn = 0; |
Javier Cardona | 5ee68e5 | 2011-08-09 16:45:08 -0700 | [diff] [blame] | 783 | ifmsh->num_gates = 0; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 784 | atomic_set(&ifmsh->mpaths, 0); |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 785 | mesh_rmc_init(sdata); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 786 | ifmsh->last_preq = jiffies; |
Thomas Pedersen | dca7e94 | 2011-11-24 17:15:24 -0800 | [diff] [blame] | 787 | ifmsh->next_perr = jiffies; |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 788 | /* Allocate all mesh structures when creating the first mesh interface. */ |
| 789 | if (!mesh_allocated) |
| 790 | ieee80211s_init(); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 791 | setup_timer(&ifmsh->mesh_path_timer, |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 792 | ieee80211_mesh_path_timer, |
| 793 | (unsigned long) sdata); |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 794 | setup_timer(&ifmsh->mesh_path_root_timer, |
| 795 | ieee80211_mesh_path_root_timer, |
| 796 | (unsigned long) sdata); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 797 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
| 798 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); |
Javier Cardona | dbf498f | 2012-03-31 11:31:32 -0700 | [diff] [blame] | 799 | spin_lock_init(&ifmsh->sync_offset_lock); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 800 | } |