Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2008 open80211s Ltd. |
| 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 | |
Luis Carlos Cobo | 51cedda | 2008-04-23 12:15:29 -0700 | [diff] [blame] | 11 | #include <asm/unaligned.h> |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 12 | #include "ieee80211_i.h" |
| 13 | #include "mesh.h" |
| 14 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 15 | #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ) |
| 16 | #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ) |
| 17 | |
John W. Linville | 2473670 | 2008-04-08 14:15:46 -0400 | [diff] [blame] | 18 | #define PP_OFFSET 1 /* Path Selection Protocol */ |
| 19 | #define PM_OFFSET 5 /* Path Selection Metric */ |
| 20 | #define CC_OFFSET 9 /* Congestion Control Mode */ |
| 21 | #define CAPAB_OFFSET 17 |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 22 | #define ACCEPT_PLINKS 0x80 |
| 23 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 24 | #define TMR_RUNNING_HK 0 |
| 25 | #define TMR_RUNNING_MP 1 |
| 26 | |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 27 | int mesh_allocated; |
| 28 | static struct kmem_cache *rm_cache; |
| 29 | |
| 30 | void ieee80211s_init(void) |
| 31 | { |
| 32 | mesh_pathtbl_init(); |
| 33 | mesh_allocated = 1; |
| 34 | rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), |
| 35 | 0, 0, NULL); |
| 36 | } |
| 37 | |
| 38 | void ieee80211s_stop(void) |
| 39 | { |
| 40 | mesh_pathtbl_unregister(); |
| 41 | kmem_cache_destroy(rm_cache); |
| 42 | } |
| 43 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 44 | static void ieee80211_mesh_housekeeping_timer(unsigned long data) |
| 45 | { |
| 46 | struct ieee80211_sub_if_data *sdata = (void *) data; |
| 47 | struct ieee80211_local *local = sdata->local; |
| 48 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 49 | |
| 50 | ifmsh->housekeeping = true; |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 51 | |
| 52 | if (local->quiescing) { |
| 53 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); |
| 54 | return; |
| 55 | } |
| 56 | |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 57 | ieee80211_queue_work(local->hw.workqueue, &ifmsh->work); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 58 | } |
| 59 | |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 60 | /** |
| 61 | * mesh_matches_local - check if the config of a mesh point matches ours |
| 62 | * |
| 63 | * @ie: information elements of a management frame from the mesh peer |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 64 | * @sdata: local mesh subif |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 65 | * |
| 66 | * This function checks if the mesh configuration of a mesh point matches the |
| 67 | * local mesh configuration, i.e. if both nodes belong to the same mesh network. |
| 68 | */ |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 69 | bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_data *sdata) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 70 | { |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 71 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 72 | |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 73 | /* |
| 74 | * As support for each feature is added, check for matching |
| 75 | * - On mesh config capabilities |
| 76 | * - Power Save Support En |
| 77 | * - Sync support enabled |
| 78 | * - Sync support active |
| 79 | * - Sync support required from peer |
| 80 | * - MDA enabled |
| 81 | * - Power management control on fc |
| 82 | */ |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 83 | if (ifmsh->mesh_id_len == ie->mesh_id_len && |
| 84 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && |
| 85 | memcmp(ifmsh->mesh_pp_id, ie->mesh_config + PP_OFFSET, 4) == 0 && |
| 86 | memcmp(ifmsh->mesh_pm_id, ie->mesh_config + PM_OFFSET, 4) == 0 && |
| 87 | memcmp(ifmsh->mesh_cc_id, ie->mesh_config + CC_OFFSET, 4) == 0) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 88 | return true; |
| 89 | |
| 90 | return false; |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links |
| 95 | * |
| 96 | * @ie: information elements of a management frame from the mesh peer |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 97 | */ |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 98 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 99 | { |
| 100 | return (*(ie->mesh_config + CAPAB_OFFSET) & ACCEPT_PLINKS) != 0; |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * mesh_accept_plinks_update: update accepting_plink in local mesh beacons |
| 105 | * |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 106 | * @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] | 107 | */ |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 108 | void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 109 | { |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 110 | bool free_plinks; |
| 111 | |
| 112 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, |
| 113 | * 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] | 114 | * are already on the table but are not on PLINK_ESTAB state. However, |
| 115 | * in general the mesh interface is not accepting peer link requests |
| 116 | * from new peers, and that must be reflected in the beacon |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 117 | */ |
| 118 | free_plinks = mesh_plink_availables(sdata); |
| 119 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 120 | if (free_plinks != sdata->u.mesh.accepting_plinks) |
| 121 | ieee80211_mesh_housekeeping_timer((unsigned long) sdata); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 122 | } |
| 123 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 124 | void mesh_ids_set_default(struct ieee80211_if_mesh *sta) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 125 | { |
| 126 | u8 def_id[4] = {0x00, 0x0F, 0xAC, 0xff}; |
| 127 | |
| 128 | memcpy(sta->mesh_pp_id, def_id, 4); |
| 129 | memcpy(sta->mesh_pm_id, def_id, 4); |
| 130 | memcpy(sta->mesh_cc_id, def_id, 4); |
| 131 | } |
| 132 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 133 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 134 | { |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 135 | int i; |
| 136 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 137 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
| 138 | if (!sdata->u.mesh.rmc) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 139 | return -ENOMEM; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 140 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 141 | for (i = 0; i < RMC_BUCKETS; i++) |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 142 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i].list); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 143 | return 0; |
| 144 | } |
| 145 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 146 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 147 | { |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 148 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 149 | struct rmc_entry *p, *n; |
| 150 | int i; |
| 151 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 152 | if (!sdata->u.mesh.rmc) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 153 | return; |
| 154 | |
| 155 | for (i = 0; i < RMC_BUCKETS; i++) |
| 156 | list_for_each_entry_safe(p, n, &rmc->bucket[i].list, list) { |
| 157 | list_del(&p->list); |
| 158 | kmem_cache_free(rm_cache, p); |
| 159 | } |
| 160 | |
| 161 | kfree(rmc); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 162 | sdata->u.mesh.rmc = NULL; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 163 | } |
| 164 | |
| 165 | /** |
| 166 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. |
| 167 | * |
| 168 | * @sa: source address |
| 169 | * @mesh_hdr: mesh_header |
| 170 | * |
| 171 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. |
| 172 | * |
| 173 | * Checks using the source address and the mesh sequence number if we have |
| 174 | * received this frame lately. If the frame is not in the cache, it is added to |
| 175 | * it. |
| 176 | */ |
| 177 | int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr, |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 178 | struct ieee80211_sub_if_data *sdata) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 179 | { |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 180 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 181 | u32 seqnum = 0; |
| 182 | int entries = 0; |
| 183 | u8 idx; |
| 184 | struct rmc_entry *p, *n; |
| 185 | |
| 186 | /* Don't care about endianness since only match matters */ |
Luis Carlos Cobo | 51cedda | 2008-04-23 12:15:29 -0700 | [diff] [blame] | 187 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
| 188 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 189 | list_for_each_entry_safe(p, n, &rmc->bucket[idx].list, list) { |
| 190 | ++entries; |
| 191 | if (time_after(jiffies, p->exp_time) || |
| 192 | (entries == RMC_QUEUE_MAX_LEN)) { |
| 193 | list_del(&p->list); |
| 194 | kmem_cache_free(rm_cache, p); |
| 195 | --entries; |
| 196 | } else if ((seqnum == p->seqnum) |
| 197 | && (memcmp(sa, p->sa, ETH_ALEN) == 0)) |
| 198 | return -1; |
| 199 | } |
| 200 | |
| 201 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); |
| 202 | if (!p) { |
| 203 | printk(KERN_DEBUG "o11s: could not allocate RMC entry\n"); |
| 204 | return 0; |
| 205 | } |
| 206 | p->seqnum = seqnum; |
| 207 | p->exp_time = jiffies + RMC_TIMEOUT; |
| 208 | memcpy(p->sa, sa, ETH_ALEN); |
| 209 | list_add(&p->list, &rmc->bucket[idx].list); |
| 210 | return 0; |
| 211 | } |
| 212 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 213 | void mesh_mgmt_ies_add(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 214 | { |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 215 | struct ieee80211_local *local = sdata->local; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 216 | struct ieee80211_supported_band *sband; |
| 217 | u8 *pos; |
| 218 | int len, i, rate; |
| 219 | |
| 220 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| 221 | len = sband->n_bitrates; |
| 222 | if (len > 8) |
| 223 | len = 8; |
| 224 | pos = skb_put(skb, len + 2); |
| 225 | *pos++ = WLAN_EID_SUPP_RATES; |
| 226 | *pos++ = len; |
| 227 | for (i = 0; i < len; i++) { |
| 228 | rate = sband->bitrates[i].bitrate; |
| 229 | *pos++ = (u8) (rate / 5); |
| 230 | } |
| 231 | |
| 232 | if (sband->n_bitrates > len) { |
| 233 | pos = skb_put(skb, sband->n_bitrates - len + 2); |
| 234 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
| 235 | *pos++ = sband->n_bitrates - len; |
| 236 | for (i = len; i < sband->n_bitrates; i++) { |
| 237 | rate = sband->bitrates[i].bitrate; |
| 238 | *pos++ = (u8) (rate / 5); |
| 239 | } |
| 240 | } |
| 241 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 242 | pos = skb_put(skb, 2 + sdata->u.mesh.mesh_id_len); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 243 | *pos++ = WLAN_EID_MESH_ID; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 244 | *pos++ = sdata->u.mesh.mesh_id_len; |
| 245 | if (sdata->u.mesh.mesh_id_len) |
| 246 | memcpy(pos, sdata->u.mesh.mesh_id, sdata->u.mesh.mesh_id_len); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 247 | |
| 248 | pos = skb_put(skb, 21); |
| 249 | *pos++ = WLAN_EID_MESH_CONFIG; |
Johannes Berg | 1239cd5 | 2008-10-28 11:12:57 +0100 | [diff] [blame] | 250 | *pos++ = IEEE80211_MESH_CONFIG_LEN; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 251 | /* Version */ |
| 252 | *pos++ = 1; |
| 253 | |
| 254 | /* Active path selection protocol ID */ |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 255 | memcpy(pos, sdata->u.mesh.mesh_pp_id, 4); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 256 | pos += 4; |
| 257 | |
| 258 | /* Active path selection metric ID */ |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 259 | memcpy(pos, sdata->u.mesh.mesh_pm_id, 4); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 260 | pos += 4; |
| 261 | |
| 262 | /* Congestion control mode identifier */ |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 263 | memcpy(pos, sdata->u.mesh.mesh_cc_id, 4); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 264 | pos += 4; |
| 265 | |
| 266 | /* Channel precedence: |
| 267 | * Not running simple channel unification protocol |
| 268 | */ |
| 269 | memset(pos, 0x00, 4); |
| 270 | pos += 4; |
| 271 | |
| 272 | /* Mesh capability */ |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 273 | sdata->u.mesh.accepting_plinks = mesh_plink_availables(sdata); |
| 274 | *pos++ = sdata->u.mesh.accepting_plinks ? ACCEPT_PLINKS : 0x00; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 275 | *pos++ = 0x00; |
| 276 | |
| 277 | return; |
| 278 | } |
| 279 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 280 | u32 mesh_table_hash(u8 *addr, struct ieee80211_sub_if_data *sdata, struct mesh_table *tbl) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 281 | { |
| 282 | /* Use last four bytes of hw addr and interface index as hash index */ |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 283 | return jhash_2words(*(u32 *)(addr+2), sdata->dev->ifindex, tbl->hash_rnd) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 284 | & tbl->hash_mask; |
| 285 | } |
| 286 | |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 287 | struct mesh_table *mesh_table_alloc(int size_order) |
| 288 | { |
| 289 | int i; |
| 290 | struct mesh_table *newtbl; |
| 291 | |
| 292 | newtbl = kmalloc(sizeof(struct mesh_table), GFP_KERNEL); |
| 293 | if (!newtbl) |
| 294 | return NULL; |
| 295 | |
| 296 | newtbl->hash_buckets = kzalloc(sizeof(struct hlist_head) * |
| 297 | (1 << size_order), GFP_KERNEL); |
| 298 | |
| 299 | if (!newtbl->hash_buckets) { |
| 300 | kfree(newtbl); |
| 301 | return NULL; |
| 302 | } |
| 303 | |
| 304 | newtbl->hashwlock = kmalloc(sizeof(spinlock_t) * |
| 305 | (1 << size_order), GFP_KERNEL); |
| 306 | if (!newtbl->hashwlock) { |
| 307 | kfree(newtbl->hash_buckets); |
| 308 | kfree(newtbl); |
| 309 | return NULL; |
| 310 | } |
| 311 | |
| 312 | newtbl->size_order = size_order; |
| 313 | newtbl->hash_mask = (1 << size_order) - 1; |
| 314 | atomic_set(&newtbl->entries, 0); |
| 315 | get_random_bytes(&newtbl->hash_rnd, |
| 316 | sizeof(newtbl->hash_rnd)); |
| 317 | for (i = 0; i <= newtbl->hash_mask; i++) |
| 318 | spin_lock_init(&newtbl->hashwlock[i]); |
| 319 | |
| 320 | return newtbl; |
| 321 | } |
| 322 | |
Pavel Emelyanov | bd9b448 | 2008-05-07 19:57:11 +0400 | [diff] [blame] | 323 | static void __mesh_table_free(struct mesh_table *tbl) |
| 324 | { |
| 325 | kfree(tbl->hash_buckets); |
| 326 | kfree(tbl->hashwlock); |
| 327 | kfree(tbl); |
| 328 | } |
| 329 | |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 330 | void mesh_table_free(struct mesh_table *tbl, bool free_leafs) |
| 331 | { |
| 332 | struct hlist_head *mesh_hash; |
| 333 | struct hlist_node *p, *q; |
| 334 | int i; |
| 335 | |
| 336 | mesh_hash = tbl->hash_buckets; |
| 337 | for (i = 0; i <= tbl->hash_mask; i++) { |
| 338 | spin_lock(&tbl->hashwlock[i]); |
| 339 | hlist_for_each_safe(p, q, &mesh_hash[i]) { |
| 340 | tbl->free_node(p, free_leafs); |
| 341 | atomic_dec(&tbl->entries); |
| 342 | } |
| 343 | spin_unlock(&tbl->hashwlock[i]); |
| 344 | } |
Pavel Emelyanov | bd9b448 | 2008-05-07 19:57:11 +0400 | [diff] [blame] | 345 | __mesh_table_free(tbl); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 346 | } |
| 347 | |
| 348 | static void ieee80211_mesh_path_timer(unsigned long data) |
| 349 | { |
| 350 | struct ieee80211_sub_if_data *sdata = |
| 351 | (struct ieee80211_sub_if_data *) data; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 352 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
Johannes Berg | 133b822 | 2008-09-16 14:18:59 +0200 | [diff] [blame] | 353 | struct ieee80211_local *local = sdata->local; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 354 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 355 | if (local->quiescing) { |
| 356 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); |
| 357 | return; |
| 358 | } |
| 359 | |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 360 | ieee80211_queue_work(local->hw.workqueue, &ifmsh->work); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 361 | } |
| 362 | |
| 363 | struct mesh_table *mesh_table_grow(struct mesh_table *tbl) |
| 364 | { |
| 365 | struct mesh_table *newtbl; |
| 366 | struct hlist_head *oldhash; |
Pavel Emelyanov | 4caf86c | 2008-05-07 19:47:01 +0400 | [diff] [blame] | 367 | struct hlist_node *p, *q; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 368 | int i; |
| 369 | |
| 370 | if (atomic_read(&tbl->entries) |
Pavel Emelyanov | a3538b1 | 2008-05-07 19:55:59 +0400 | [diff] [blame] | 371 | < tbl->mean_chain_len * (tbl->hash_mask + 1)) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 372 | goto endgrow; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 373 | |
| 374 | newtbl = mesh_table_alloc(tbl->size_order + 1); |
Pavel Emelyanov | a3538b1 | 2008-05-07 19:55:59 +0400 | [diff] [blame] | 375 | if (!newtbl) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 376 | goto endgrow; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 377 | |
| 378 | newtbl->free_node = tbl->free_node; |
| 379 | newtbl->mean_chain_len = tbl->mean_chain_len; |
| 380 | newtbl->copy_node = tbl->copy_node; |
| 381 | atomic_set(&newtbl->entries, atomic_read(&tbl->entries)); |
| 382 | |
| 383 | oldhash = tbl->hash_buckets; |
| 384 | for (i = 0; i <= tbl->hash_mask; i++) |
| 385 | hlist_for_each(p, &oldhash[i]) |
Pavel Emelyanov | 4caf86c | 2008-05-07 19:47:01 +0400 | [diff] [blame] | 386 | if (tbl->copy_node(p, newtbl) < 0) |
| 387 | goto errcopy; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 388 | |
Pavel Emelyanov | a3538b1 | 2008-05-07 19:55:59 +0400 | [diff] [blame] | 389 | return newtbl; |
Pavel Emelyanov | 4caf86c | 2008-05-07 19:47:01 +0400 | [diff] [blame] | 390 | |
| 391 | errcopy: |
| 392 | for (i = 0; i <= newtbl->hash_mask; i++) { |
| 393 | hlist_for_each_safe(p, q, &newtbl->hash_buckets[i]) |
| 394 | tbl->free_node(p, 0); |
| 395 | } |
Julia Lawall | 667d8af | 2008-08-23 18:27:38 +0200 | [diff] [blame] | 396 | __mesh_table_free(newtbl); |
Pavel Emelyanov | a3538b1 | 2008-05-07 19:55:59 +0400 | [diff] [blame] | 397 | endgrow: |
Pavel Emelyanov | 4caf86c | 2008-05-07 19:47:01 +0400 | [diff] [blame] | 398 | return NULL; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 399 | } |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 400 | |
| 401 | /** |
| 402 | * ieee80211_new_mesh_header - create a new mesh header |
| 403 | * @meshhdr: uninitialized mesh header |
| 404 | * @sdata: mesh interface to be used |
| 405 | * |
| 406 | * Return the header length. |
| 407 | */ |
| 408 | int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr, |
| 409 | struct ieee80211_sub_if_data *sdata) |
| 410 | { |
| 411 | meshhdr->flags = 0; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 412 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
| 413 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); |
| 414 | sdata->u.mesh.mesh_seqnum++; |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 415 | |
Luis Carlos Cobo | ef26925 | 2008-05-05 12:02:35 -0700 | [diff] [blame] | 416 | return 6; |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 417 | } |
| 418 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 419 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
| 420 | struct ieee80211_if_mesh *ifmsh) |
| 421 | { |
| 422 | bool free_plinks; |
| 423 | |
| 424 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 425 | printk(KERN_DEBUG "%s: running mesh housekeeping\n", |
| 426 | sdata->dev->name); |
| 427 | #endif |
| 428 | |
| 429 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); |
| 430 | mesh_path_expire(sdata); |
| 431 | |
| 432 | free_plinks = mesh_plink_availables(sdata); |
| 433 | if (free_plinks != sdata->u.mesh.accepting_plinks) |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 434 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 435 | |
| 436 | ifmsh->housekeeping = false; |
| 437 | mod_timer(&ifmsh->housekeeping_timer, |
| 438 | round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); |
| 439 | } |
| 440 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 441 | #ifdef CONFIG_PM |
| 442 | void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata) |
| 443 | { |
| 444 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 445 | |
| 446 | /* might restart the timer but that doesn't matter */ |
| 447 | cancel_work_sync(&ifmsh->work); |
| 448 | |
| 449 | /* use atomic bitops in case both timers fire at the same time */ |
| 450 | |
| 451 | if (del_timer_sync(&ifmsh->housekeeping_timer)) |
| 452 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); |
| 453 | if (del_timer_sync(&ifmsh->mesh_path_timer)) |
| 454 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); |
| 455 | } |
| 456 | |
| 457 | void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata) |
| 458 | { |
| 459 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 460 | |
| 461 | if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running)) |
| 462 | add_timer(&ifmsh->housekeeping_timer); |
| 463 | if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running)) |
| 464 | add_timer(&ifmsh->mesh_path_timer); |
| 465 | } |
| 466 | #endif |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 467 | |
| 468 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) |
| 469 | { |
| 470 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 471 | struct ieee80211_local *local = sdata->local; |
| 472 | |
| 473 | ifmsh->housekeeping = true; |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 474 | ieee80211_queue_work(local->hw.workqueue, &ifmsh->work); |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 475 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON | |
| 476 | BSS_CHANGED_BEACON_ENABLED); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 477 | } |
| 478 | |
| 479 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) |
| 480 | { |
| 481 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
| 482 | /* |
Johannes Berg | b741343 | 2008-09-11 00:01:50 +0200 | [diff] [blame] | 483 | * If the timer fired while we waited for it, it will have |
| 484 | * requeued the work. Now the work will be running again |
| 485 | * but will not rearm the timer again because it checks |
| 486 | * whether the interface is running, which, at this point, |
| 487 | * it no longer is. |
| 488 | */ |
| 489 | cancel_work_sync(&sdata->u.mesh.work); |
| 490 | |
| 491 | /* |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 492 | * When we get here, the interface is marked down. |
| 493 | * Call synchronize_rcu() to wait for the RX path |
| 494 | * should it be using the interface and enqueuing |
| 495 | * frames at this very time on another CPU. |
| 496 | */ |
Jesper Dangaard Brouer | 4a27096 | 2009-06-26 10:45:53 +0000 | [diff] [blame] | 497 | rcu_barrier(); /* Wait for RX path and call_rcu()'s */ |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 498 | skb_queue_purge(&sdata->u.mesh.skb_queue); |
| 499 | } |
| 500 | |
| 501 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, |
| 502 | u16 stype, |
| 503 | struct ieee80211_mgmt *mgmt, |
| 504 | size_t len, |
| 505 | struct ieee80211_rx_status *rx_status) |
| 506 | { |
Johannes Berg | c6a1fa1 | 2008-10-07 12:04:32 +0200 | [diff] [blame] | 507 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 508 | struct ieee802_11_elems elems; |
| 509 | struct ieee80211_channel *channel; |
Johannes Berg | 881d948 | 2009-01-21 15:13:48 +0100 | [diff] [blame] | 510 | u32 supp_rates = 0; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 511 | size_t baselen; |
| 512 | int freq; |
| 513 | enum ieee80211_band band = rx_status->band; |
| 514 | |
| 515 | /* ignore ProbeResp to foreign address */ |
| 516 | if (stype == IEEE80211_STYPE_PROBE_RESP && |
| 517 | compare_ether_addr(mgmt->da, sdata->dev->dev_addr)) |
| 518 | return; |
| 519 | |
| 520 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
| 521 | if (baselen > len) |
| 522 | return; |
| 523 | |
| 524 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, |
| 525 | &elems); |
| 526 | |
| 527 | if (elems.ds_params && elems.ds_params_len == 1) |
| 528 | freq = ieee80211_channel_to_frequency(elems.ds_params[0]); |
| 529 | else |
| 530 | freq = rx_status->freq; |
| 531 | |
| 532 | channel = ieee80211_get_channel(local->hw.wiphy, freq); |
| 533 | |
| 534 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) |
| 535 | return; |
| 536 | |
| 537 | if (elems.mesh_id && elems.mesh_config && |
| 538 | mesh_matches_local(&elems, sdata)) { |
| 539 | supp_rates = ieee80211_sta_get_rates(local, &elems, band); |
| 540 | |
| 541 | mesh_neighbour_update(mgmt->sa, supp_rates, sdata, |
| 542 | mesh_peer_accepts_plinks(&elems)); |
| 543 | } |
| 544 | } |
| 545 | |
| 546 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, |
| 547 | struct ieee80211_mgmt *mgmt, |
| 548 | size_t len, |
| 549 | struct ieee80211_rx_status *rx_status) |
| 550 | { |
| 551 | switch (mgmt->u.action.category) { |
| 552 | case PLINK_CATEGORY: |
| 553 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); |
| 554 | break; |
| 555 | case MESH_PATH_SEL_CATEGORY: |
| 556 | mesh_rx_path_sel_frame(sdata, mgmt, len); |
| 557 | break; |
| 558 | } |
| 559 | } |
| 560 | |
| 561 | static void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
| 562 | struct sk_buff *skb) |
| 563 | { |
| 564 | struct ieee80211_rx_status *rx_status; |
| 565 | struct ieee80211_if_mesh *ifmsh; |
| 566 | struct ieee80211_mgmt *mgmt; |
| 567 | u16 stype; |
| 568 | |
| 569 | ifmsh = &sdata->u.mesh; |
| 570 | |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 571 | rx_status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 572 | mgmt = (struct ieee80211_mgmt *) skb->data; |
| 573 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; |
| 574 | |
| 575 | switch (stype) { |
| 576 | case IEEE80211_STYPE_PROBE_RESP: |
| 577 | case IEEE80211_STYPE_BEACON: |
| 578 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, |
| 579 | rx_status); |
| 580 | break; |
| 581 | case IEEE80211_STYPE_ACTION: |
| 582 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); |
| 583 | break; |
| 584 | } |
| 585 | |
| 586 | kfree_skb(skb); |
| 587 | } |
| 588 | |
| 589 | static void ieee80211_mesh_work(struct work_struct *work) |
| 590 | { |
| 591 | struct ieee80211_sub_if_data *sdata = |
| 592 | container_of(work, struct ieee80211_sub_if_data, u.mesh.work); |
| 593 | struct ieee80211_local *local = sdata->local; |
| 594 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 595 | struct sk_buff *skb; |
| 596 | |
| 597 | if (!netif_running(sdata->dev)) |
| 598 | return; |
| 599 | |
Helmut Schaa | fbe9c42 | 2009-07-23 12:14:04 +0200 | [diff] [blame] | 600 | if (local->scanning) |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 601 | return; |
| 602 | |
| 603 | while ((skb = skb_dequeue(&ifmsh->skb_queue))) |
| 604 | ieee80211_mesh_rx_queued_mgmt(sdata, skb); |
| 605 | |
| 606 | if (ifmsh->preq_queue_len && |
| 607 | time_after(jiffies, |
| 608 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) |
| 609 | mesh_path_start_discovery(sdata); |
| 610 | |
| 611 | if (ifmsh->housekeeping) |
| 612 | ieee80211_mesh_housekeeping(sdata, ifmsh); |
| 613 | } |
| 614 | |
| 615 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) |
| 616 | { |
| 617 | struct ieee80211_sub_if_data *sdata; |
| 618 | |
| 619 | rcu_read_lock(); |
| 620 | list_for_each_entry_rcu(sdata, &local->interfaces, list) |
| 621 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 622 | ieee80211_queue_work(local->hw.workqueue, &sdata->u.mesh.work); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 623 | rcu_read_unlock(); |
| 624 | } |
| 625 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 626 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
| 627 | { |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 628 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 629 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 630 | INIT_WORK(&ifmsh->work, ieee80211_mesh_work); |
| 631 | setup_timer(&ifmsh->housekeeping_timer, |
| 632 | ieee80211_mesh_housekeeping_timer, |
| 633 | (unsigned long) sdata); |
| 634 | skb_queue_head_init(&sdata->u.mesh.skb_queue); |
| 635 | |
| 636 | ifmsh->mshcfg.dot11MeshRetryTimeout = MESH_RET_T; |
| 637 | ifmsh->mshcfg.dot11MeshConfirmTimeout = MESH_CONF_T; |
| 638 | ifmsh->mshcfg.dot11MeshHoldingTimeout = MESH_HOLD_T; |
| 639 | ifmsh->mshcfg.dot11MeshMaxRetries = MESH_MAX_RETR; |
| 640 | ifmsh->mshcfg.dot11MeshTTL = MESH_TTL; |
| 641 | ifmsh->mshcfg.auto_open_plinks = true; |
| 642 | ifmsh->mshcfg.dot11MeshMaxPeerLinks = |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 643 | MESH_MAX_ESTAB_PLINKS; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 644 | ifmsh->mshcfg.dot11MeshHWMPactivePathTimeout = |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 645 | MESH_PATH_TIMEOUT; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 646 | ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval = |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 647 | MESH_PREQ_MIN_INT; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 648 | ifmsh->mshcfg.dot11MeshHWMPnetDiameterTraversalTime = |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 649 | MESH_DIAM_TRAVERSAL_TIME; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 650 | ifmsh->mshcfg.dot11MeshHWMPmaxPREQretries = |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 651 | MESH_MAX_PREQ_RETRIES; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 652 | ifmsh->mshcfg.path_refresh_time = |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 653 | MESH_PATH_REFRESH_TIME; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 654 | ifmsh->mshcfg.min_discovery_timeout = |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 655 | MESH_MIN_DISCOVERY_TIMEOUT; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 656 | ifmsh->accepting_plinks = true; |
| 657 | ifmsh->preq_id = 0; |
| 658 | ifmsh->dsn = 0; |
| 659 | atomic_set(&ifmsh->mpaths, 0); |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 660 | mesh_rmc_init(sdata); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 661 | ifmsh->last_preq = jiffies; |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 662 | /* Allocate all mesh structures when creating the first mesh interface. */ |
| 663 | if (!mesh_allocated) |
| 664 | ieee80211s_init(); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 665 | mesh_ids_set_default(ifmsh); |
| 666 | setup_timer(&ifmsh->mesh_path_timer, |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 667 | ieee80211_mesh_path_timer, |
| 668 | (unsigned long) sdata); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 669 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
| 670 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); |
| 671 | } |
| 672 | |
| 673 | ieee80211_rx_result |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 674 | ieee80211_mesh_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 675 | { |
| 676 | struct ieee80211_local *local = sdata->local; |
| 677 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 678 | struct ieee80211_mgmt *mgmt; |
| 679 | u16 fc; |
| 680 | |
| 681 | if (skb->len < 24) |
| 682 | return RX_DROP_MONITOR; |
| 683 | |
| 684 | mgmt = (struct ieee80211_mgmt *) skb->data; |
| 685 | fc = le16_to_cpu(mgmt->frame_control); |
| 686 | |
| 687 | switch (fc & IEEE80211_FCTL_STYPE) { |
Johannes Berg | a43816d | 2009-07-10 11:39:26 +0200 | [diff] [blame] | 688 | case IEEE80211_STYPE_ACTION: |
| 689 | if (skb->len < IEEE80211_MIN_ACTION_SIZE) |
| 690 | return RX_DROP_MONITOR; |
| 691 | /* fall through */ |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 692 | case IEEE80211_STYPE_PROBE_RESP: |
| 693 | case IEEE80211_STYPE_BEACON: |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 694 | skb_queue_tail(&ifmsh->skb_queue, skb); |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 695 | ieee80211_queue_work(local->hw.workqueue, &ifmsh->work); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 696 | return RX_QUEUED; |
| 697 | } |
| 698 | |
| 699 | return RX_CONTINUE; |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 700 | } |