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 | |
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) |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 17 | #define IEEE80211_MESH_RANN_INTERVAL (1 * HZ) |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 18 | |
Rui Paulo | 3491707 | 2009-11-09 23:46:39 +0000 | [diff] [blame] | 19 | #define MESHCONF_CAPAB_ACCEPT_PLINKS 0x01 |
| 20 | #define MESHCONF_CAPAB_FORWARDING 0x08 |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 21 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 22 | #define TMR_RUNNING_HK 0 |
| 23 | #define TMR_RUNNING_MP 1 |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 24 | #define TMR_RUNNING_MPR 2 |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 25 | |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 26 | int mesh_allocated; |
| 27 | static struct kmem_cache *rm_cache; |
| 28 | |
| 29 | void ieee80211s_init(void) |
| 30 | { |
| 31 | mesh_pathtbl_init(); |
| 32 | mesh_allocated = 1; |
| 33 | rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), |
| 34 | 0, 0, NULL); |
| 35 | } |
| 36 | |
| 37 | void ieee80211s_stop(void) |
| 38 | { |
| 39 | mesh_pathtbl_unregister(); |
| 40 | kmem_cache_destroy(rm_cache); |
| 41 | } |
| 42 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 43 | static void ieee80211_mesh_housekeeping_timer(unsigned long data) |
| 44 | { |
| 45 | struct ieee80211_sub_if_data *sdata = (void *) data; |
| 46 | struct ieee80211_local *local = sdata->local; |
| 47 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 48 | |
Rui Paulo | 6b9ac44 | 2009-10-20 21:21:48 +0100 | [diff] [blame] | 49 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 50 | |
| 51 | if (local->quiescing) { |
| 52 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); |
| 53 | return; |
| 54 | } |
| 55 | |
Luis R. Rodriguez | c03e20f | 2009-08-04 15:06:26 -0700 | [diff] [blame] | 56 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 57 | } |
| 58 | |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 59 | /** |
| 60 | * mesh_matches_local - check if the config of a mesh point matches ours |
| 61 | * |
| 62 | * @ie: information elements of a management frame from the mesh peer |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 63 | * @sdata: local mesh subif |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 64 | * |
| 65 | * This function checks if the mesh configuration of a mesh point matches the |
| 66 | * local mesh configuration, i.e. if both nodes belong to the same mesh network. |
| 67 | */ |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 68 | 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] | 69 | { |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 70 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 71 | |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 72 | /* |
| 73 | * As support for each feature is added, check for matching |
| 74 | * - On mesh config capabilities |
| 75 | * - Power Save Support En |
| 76 | * - Sync support enabled |
| 77 | * - Sync support active |
| 78 | * - Sync support required from peer |
| 79 | * - MDA enabled |
| 80 | * - Power management control on fc |
| 81 | */ |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 82 | if (ifmsh->mesh_id_len == ie->mesh_id_len && |
| 83 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && |
Rui Paulo | 136cfa2 | 2009-11-18 18:40:00 +0000 | [diff] [blame] | 84 | (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && |
| 85 | (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && |
| 86 | (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && |
| 87 | (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && |
| 88 | (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth)) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 89 | return true; |
| 90 | |
| 91 | return false; |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links |
| 96 | * |
| 97 | * @ie: information elements of a management frame from the mesh peer |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 98 | */ |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 99 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 100 | { |
Rui Paulo | 136cfa2 | 2009-11-18 18:40:00 +0000 | [diff] [blame] | 101 | return (ie->mesh_config->meshconf_cap & |
Rui Paulo | 3491707 | 2009-11-09 23:46:39 +0000 | [diff] [blame] | 102 | MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 103 | } |
| 104 | |
| 105 | /** |
| 106 | * mesh_accept_plinks_update: update accepting_plink in local mesh beacons |
| 107 | * |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 108 | * @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] | 109 | */ |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 110 | void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 111 | { |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 112 | bool free_plinks; |
| 113 | |
| 114 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, |
| 115 | * 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] | 116 | * are already on the table but are not on PLINK_ESTAB state. However, |
| 117 | * in general the mesh interface is not accepting peer link requests |
| 118 | * from new peers, and that must be reflected in the beacon |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 119 | */ |
| 120 | free_plinks = mesh_plink_availables(sdata); |
| 121 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 122 | if (free_plinks != sdata->u.mesh.accepting_plinks) |
| 123 | ieee80211_mesh_housekeeping_timer((unsigned long) sdata); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 124 | } |
| 125 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 126 | void mesh_ids_set_default(struct ieee80211_if_mesh *sta) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 127 | { |
Rui Paulo | 3491707 | 2009-11-09 23:46:39 +0000 | [diff] [blame] | 128 | sta->mesh_pp_id = 0; /* HWMP */ |
| 129 | sta->mesh_pm_id = 0; /* Airtime */ |
| 130 | sta->mesh_cc_id = 0; /* Disabled */ |
| 131 | sta->mesh_sp_id = 0; /* Neighbor Offset */ |
| 132 | sta->mesh_auth_id = 0; /* Disabled */ |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 133 | } |
| 134 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 135 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 136 | { |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 137 | int i; |
| 138 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 139 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
| 140 | if (!sdata->u.mesh.rmc) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 141 | return -ENOMEM; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 142 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 143 | for (i = 0; i < RMC_BUCKETS; i++) |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 144 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i].list); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 145 | return 0; |
| 146 | } |
| 147 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 148 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 149 | { |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 150 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 151 | struct rmc_entry *p, *n; |
| 152 | int i; |
| 153 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 154 | if (!sdata->u.mesh.rmc) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 155 | return; |
| 156 | |
| 157 | for (i = 0; i < RMC_BUCKETS; i++) |
| 158 | list_for_each_entry_safe(p, n, &rmc->bucket[i].list, list) { |
| 159 | list_del(&p->list); |
| 160 | kmem_cache_free(rm_cache, p); |
| 161 | } |
| 162 | |
| 163 | kfree(rmc); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 164 | sdata->u.mesh.rmc = NULL; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 165 | } |
| 166 | |
| 167 | /** |
| 168 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. |
| 169 | * |
| 170 | * @sa: source address |
| 171 | * @mesh_hdr: mesh_header |
| 172 | * |
| 173 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. |
| 174 | * |
| 175 | * Checks using the source address and the mesh sequence number if we have |
| 176 | * received this frame lately. If the frame is not in the cache, it is added to |
| 177 | * it. |
| 178 | */ |
| 179 | int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr, |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 180 | struct ieee80211_sub_if_data *sdata) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 181 | { |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 182 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 183 | u32 seqnum = 0; |
| 184 | int entries = 0; |
| 185 | u8 idx; |
| 186 | struct rmc_entry *p, *n; |
| 187 | |
| 188 | /* Don't care about endianness since only match matters */ |
Luis Carlos Cobo | 51cedda | 2008-04-23 12:15:29 -0700 | [diff] [blame] | 189 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
| 190 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 191 | list_for_each_entry_safe(p, n, &rmc->bucket[idx].list, list) { |
| 192 | ++entries; |
| 193 | if (time_after(jiffies, p->exp_time) || |
| 194 | (entries == RMC_QUEUE_MAX_LEN)) { |
| 195 | list_del(&p->list); |
| 196 | kmem_cache_free(rm_cache, p); |
| 197 | --entries; |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 198 | } else if ((seqnum == p->seqnum) && |
| 199 | (memcmp(sa, p->sa, ETH_ALEN) == 0)) |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 200 | return -1; |
| 201 | } |
| 202 | |
| 203 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); |
| 204 | if (!p) { |
| 205 | printk(KERN_DEBUG "o11s: could not allocate RMC entry\n"); |
| 206 | return 0; |
| 207 | } |
| 208 | p->seqnum = seqnum; |
| 209 | p->exp_time = jiffies + RMC_TIMEOUT; |
| 210 | memcpy(p->sa, sa, ETH_ALEN); |
| 211 | list_add(&p->list, &rmc->bucket[idx].list); |
| 212 | return 0; |
| 213 | } |
| 214 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 215 | 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] | 216 | { |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 217 | struct ieee80211_local *local = sdata->local; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 218 | struct ieee80211_supported_band *sband; |
| 219 | u8 *pos; |
| 220 | int len, i, rate; |
Rui Paulo | 8f2fda9 | 2009-11-09 23:46:41 +0000 | [diff] [blame] | 221 | u8 neighbors; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 222 | |
| 223 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| 224 | len = sband->n_bitrates; |
| 225 | if (len > 8) |
| 226 | len = 8; |
| 227 | pos = skb_put(skb, len + 2); |
| 228 | *pos++ = WLAN_EID_SUPP_RATES; |
| 229 | *pos++ = len; |
| 230 | for (i = 0; i < len; i++) { |
| 231 | rate = sband->bitrates[i].bitrate; |
| 232 | *pos++ = (u8) (rate / 5); |
| 233 | } |
| 234 | |
| 235 | if (sband->n_bitrates > len) { |
| 236 | pos = skb_put(skb, sband->n_bitrates - len + 2); |
| 237 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
| 238 | *pos++ = sband->n_bitrates - len; |
| 239 | for (i = len; i < sband->n_bitrates; i++) { |
| 240 | rate = sband->bitrates[i].bitrate; |
| 241 | *pos++ = (u8) (rate / 5); |
| 242 | } |
| 243 | } |
| 244 | |
Rui Paulo | be125c6 | 2009-11-09 23:46:54 +0000 | [diff] [blame] | 245 | if (sband->band == IEEE80211_BAND_2GHZ) { |
| 246 | pos = skb_put(skb, 2 + 1); |
| 247 | *pos++ = WLAN_EID_DS_PARAMS; |
| 248 | *pos++ = 1; |
| 249 | *pos++ = ieee80211_frequency_to_channel(local->hw.conf.channel->center_freq); |
| 250 | } |
| 251 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 252 | pos = skb_put(skb, 2 + sdata->u.mesh.mesh_id_len); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 253 | *pos++ = WLAN_EID_MESH_ID; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 254 | *pos++ = sdata->u.mesh.mesh_id_len; |
| 255 | if (sdata->u.mesh.mesh_id_len) |
| 256 | 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] | 257 | |
Rui Paulo | 136cfa2 | 2009-11-18 18:40:00 +0000 | [diff] [blame] | 258 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_meshconf_ie)); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 259 | *pos++ = WLAN_EID_MESH_CONFIG; |
Rui Paulo | 136cfa2 | 2009-11-18 18:40:00 +0000 | [diff] [blame] | 260 | *pos++ = sizeof(struct ieee80211_meshconf_ie); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 261 | |
| 262 | /* Active path selection protocol ID */ |
Rui Paulo | 3491707 | 2009-11-09 23:46:39 +0000 | [diff] [blame] | 263 | *pos++ = sdata->u.mesh.mesh_pp_id; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 264 | |
| 265 | /* Active path selection metric ID */ |
Rui Paulo | 3491707 | 2009-11-09 23:46:39 +0000 | [diff] [blame] | 266 | *pos++ = sdata->u.mesh.mesh_pm_id; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 267 | |
| 268 | /* Congestion control mode identifier */ |
Rui Paulo | 3491707 | 2009-11-09 23:46:39 +0000 | [diff] [blame] | 269 | *pos++ = sdata->u.mesh.mesh_cc_id; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 270 | |
Javier Cardona | 9e03fdf | 2009-08-20 09:21:45 -0700 | [diff] [blame] | 271 | /* Synchronization protocol identifier */ |
Rui Paulo | 3491707 | 2009-11-09 23:46:39 +0000 | [diff] [blame] | 272 | *pos++ = sdata->u.mesh.mesh_sp_id; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 273 | |
Javier Cardona | 9e03fdf | 2009-08-20 09:21:45 -0700 | [diff] [blame] | 274 | /* Authentication Protocol identifier */ |
Rui Paulo | 3491707 | 2009-11-09 23:46:39 +0000 | [diff] [blame] | 275 | *pos++ = sdata->u.mesh.mesh_auth_id; |
Javier Cardona | 9e03fdf | 2009-08-20 09:21:45 -0700 | [diff] [blame] | 276 | |
Rui Paulo | 8f2fda9 | 2009-11-09 23:46:41 +0000 | [diff] [blame] | 277 | /* Mesh Formation Info - number of neighbors */ |
| 278 | neighbors = atomic_read(&sdata->u.mesh.mshstats.estab_plinks); |
| 279 | /* Number of neighbor mesh STAs or 15 whichever is smaller */ |
| 280 | neighbors = (neighbors > 15) ? 15 : neighbors; |
| 281 | *pos++ = neighbors << 1; |
Javier Cardona | 9e03fdf | 2009-08-20 09:21:45 -0700 | [diff] [blame] | 282 | |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 283 | /* Mesh capability */ |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 284 | sdata->u.mesh.accepting_plinks = mesh_plink_availables(sdata); |
Rui Paulo | 3491707 | 2009-11-09 23:46:39 +0000 | [diff] [blame] | 285 | *pos = MESHCONF_CAPAB_FORWARDING; |
| 286 | *pos++ |= sdata->u.mesh.accepting_plinks ? |
| 287 | MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 288 | *pos++ = 0x00; |
| 289 | |
| 290 | return; |
| 291 | } |
| 292 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 293 | 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] | 294 | { |
| 295 | /* 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] | 296 | 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] | 297 | & tbl->hash_mask; |
| 298 | } |
| 299 | |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 300 | struct mesh_table *mesh_table_alloc(int size_order) |
| 301 | { |
| 302 | int i; |
| 303 | struct mesh_table *newtbl; |
| 304 | |
| 305 | newtbl = kmalloc(sizeof(struct mesh_table), GFP_KERNEL); |
| 306 | if (!newtbl) |
| 307 | return NULL; |
| 308 | |
| 309 | newtbl->hash_buckets = kzalloc(sizeof(struct hlist_head) * |
| 310 | (1 << size_order), GFP_KERNEL); |
| 311 | |
| 312 | if (!newtbl->hash_buckets) { |
| 313 | kfree(newtbl); |
| 314 | return NULL; |
| 315 | } |
| 316 | |
| 317 | newtbl->hashwlock = kmalloc(sizeof(spinlock_t) * |
| 318 | (1 << size_order), GFP_KERNEL); |
| 319 | if (!newtbl->hashwlock) { |
| 320 | kfree(newtbl->hash_buckets); |
| 321 | kfree(newtbl); |
| 322 | return NULL; |
| 323 | } |
| 324 | |
| 325 | newtbl->size_order = size_order; |
| 326 | newtbl->hash_mask = (1 << size_order) - 1; |
| 327 | atomic_set(&newtbl->entries, 0); |
| 328 | get_random_bytes(&newtbl->hash_rnd, |
| 329 | sizeof(newtbl->hash_rnd)); |
| 330 | for (i = 0; i <= newtbl->hash_mask; i++) |
| 331 | spin_lock_init(&newtbl->hashwlock[i]); |
| 332 | |
| 333 | return newtbl; |
| 334 | } |
| 335 | |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 336 | |
| 337 | static void ieee80211_mesh_path_timer(unsigned long data) |
| 338 | { |
| 339 | struct ieee80211_sub_if_data *sdata = |
| 340 | (struct ieee80211_sub_if_data *) data; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 341 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
Johannes Berg | 133b822 | 2008-09-16 14:18:59 +0200 | [diff] [blame] | 342 | struct ieee80211_local *local = sdata->local; |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 343 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 344 | if (local->quiescing) { |
| 345 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); |
| 346 | return; |
| 347 | } |
| 348 | |
Luis R. Rodriguez | c03e20f | 2009-08-04 15:06:26 -0700 | [diff] [blame] | 349 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
Luis Carlos Cobo | 2e3c873 | 2008-02-23 15:17:09 +0100 | [diff] [blame] | 350 | } |
| 351 | |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 352 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
| 353 | { |
| 354 | struct ieee80211_sub_if_data *sdata = |
| 355 | (struct ieee80211_sub_if_data *) data; |
| 356 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 357 | struct ieee80211_local *local = sdata->local; |
| 358 | |
| 359 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
| 360 | |
| 361 | if (local->quiescing) { |
| 362 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); |
| 363 | return; |
| 364 | } |
| 365 | |
| 366 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
| 367 | } |
| 368 | |
Rui Paulo | 63c5723 | 2009-11-09 23:46:57 +0000 | [diff] [blame] | 369 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
| 370 | { |
| 371 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode) |
| 372 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
| 373 | else { |
| 374 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
| 375 | /* stop running timer */ |
| 376 | del_timer_sync(&ifmsh->mesh_path_root_timer); |
| 377 | } |
| 378 | } |
| 379 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 380 | /** |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 381 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame |
| 382 | * @hdr: 802.11 frame header |
| 383 | * @fc: frame control field |
| 384 | * @meshda: destination address in the mesh |
| 385 | * @meshsa: source address address in the mesh. Same as TA, as frame is |
| 386 | * locally originated. |
| 387 | * |
| 388 | * Return the length of the 802.11 (does not include a mesh control header) |
| 389 | */ |
Johannes Berg | 15ff636 | 2009-11-17 13:34:04 +0100 | [diff] [blame] | 390 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
| 391 | const u8 *meshda, const u8 *meshsa) |
| 392 | { |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 393 | if (is_multicast_ether_addr(meshda)) { |
| 394 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
| 395 | /* DA TA SA */ |
| 396 | memcpy(hdr->addr1, meshda, ETH_ALEN); |
| 397 | memcpy(hdr->addr2, meshsa, ETH_ALEN); |
| 398 | memcpy(hdr->addr3, meshsa, ETH_ALEN); |
| 399 | return 24; |
| 400 | } else { |
| 401 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | |
| 402 | IEEE80211_FCTL_TODS); |
| 403 | /* RA TA DA SA */ |
| 404 | memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ |
| 405 | memcpy(hdr->addr2, meshsa, ETH_ALEN); |
| 406 | memcpy(hdr->addr3, meshda, ETH_ALEN); |
| 407 | memcpy(hdr->addr4, meshsa, ETH_ALEN); |
| 408 | return 30; |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | /** |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 413 | * ieee80211_new_mesh_header - create a new mesh header |
| 414 | * @meshhdr: uninitialized mesh header |
| 415 | * @sdata: mesh interface to be used |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 416 | * @addr4: addr4 of the mesh frame (1st in ae header) |
| 417 | * may be NULL |
| 418 | * @addr5: addr5 of the mesh frame (1st or 2nd in ae header) |
| 419 | * may be NULL unless addr6 is present |
| 420 | * @addr6: addr6 of the mesh frame (2nd or 3rd in ae header) |
| 421 | * may be NULL unless addr5 is present |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 422 | * |
| 423 | * Return the header length. |
| 424 | */ |
| 425 | int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr, |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 426 | struct ieee80211_sub_if_data *sdata, char *addr4, |
| 427 | char *addr5, char *addr6) |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 428 | { |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 429 | int aelen = 0; |
| 430 | memset(meshhdr, 0, sizeof(meshhdr)); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 431 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
| 432 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); |
| 433 | sdata->u.mesh.mesh_seqnum++; |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 434 | if (addr4) { |
| 435 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
| 436 | aelen += ETH_ALEN; |
| 437 | memcpy(meshhdr->eaddr1, addr4, ETH_ALEN); |
| 438 | } |
| 439 | if (addr5 && addr6) { |
| 440 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
| 441 | aelen += 2 * ETH_ALEN; |
| 442 | if (!addr4) { |
| 443 | memcpy(meshhdr->eaddr1, addr5, ETH_ALEN); |
| 444 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); |
| 445 | } else { |
| 446 | memcpy(meshhdr->eaddr2, addr5, ETH_ALEN); |
| 447 | memcpy(meshhdr->eaddr3, addr6, ETH_ALEN); |
| 448 | } |
| 449 | } |
| 450 | return 6 + aelen; |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 451 | } |
| 452 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 453 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
| 454 | struct ieee80211_if_mesh *ifmsh) |
| 455 | { |
| 456 | bool free_plinks; |
| 457 | |
| 458 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 459 | printk(KERN_DEBUG "%s: running mesh housekeeping\n", |
| 460 | sdata->dev->name); |
| 461 | #endif |
| 462 | |
| 463 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); |
| 464 | mesh_path_expire(sdata); |
| 465 | |
| 466 | free_plinks = mesh_plink_availables(sdata); |
| 467 | if (free_plinks != sdata->u.mesh.accepting_plinks) |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 468 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 469 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 470 | mod_timer(&ifmsh->housekeeping_timer, |
| 471 | round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); |
| 472 | } |
| 473 | |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 474 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
| 475 | { |
| 476 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 477 | |
| 478 | mesh_path_tx_root_frame(sdata); |
| 479 | mod_timer(&ifmsh->mesh_path_root_timer, |
| 480 | round_jiffies(jiffies + IEEE80211_MESH_RANN_INTERVAL)); |
| 481 | } |
| 482 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 483 | #ifdef CONFIG_PM |
| 484 | void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata) |
| 485 | { |
| 486 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 487 | |
| 488 | /* might restart the timer but that doesn't matter */ |
| 489 | cancel_work_sync(&ifmsh->work); |
| 490 | |
| 491 | /* use atomic bitops in case both timers fire at the same time */ |
| 492 | |
| 493 | if (del_timer_sync(&ifmsh->housekeeping_timer)) |
| 494 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); |
| 495 | if (del_timer_sync(&ifmsh->mesh_path_timer)) |
| 496 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 497 | if (del_timer_sync(&ifmsh->mesh_path_root_timer)) |
| 498 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 499 | } |
| 500 | |
| 501 | void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata) |
| 502 | { |
| 503 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 504 | |
| 505 | if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running)) |
| 506 | add_timer(&ifmsh->housekeeping_timer); |
| 507 | if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running)) |
| 508 | add_timer(&ifmsh->mesh_path_timer); |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 509 | if (test_and_clear_bit(TMR_RUNNING_MPR, &ifmsh->timers_running)) |
| 510 | add_timer(&ifmsh->mesh_path_root_timer); |
Rui Paulo | 63c5723 | 2009-11-09 23:46:57 +0000 | [diff] [blame] | 511 | ieee80211_mesh_root_setup(ifmsh); |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 512 | } |
| 513 | #endif |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 514 | |
| 515 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) |
| 516 | { |
| 517 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 518 | struct ieee80211_local *local = sdata->local; |
| 519 | |
Rui Paulo | 6b9ac44 | 2009-10-20 21:21:48 +0100 | [diff] [blame] | 520 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
Rui Paulo | 63c5723 | 2009-11-09 23:46:57 +0000 | [diff] [blame] | 521 | ieee80211_mesh_root_setup(ifmsh); |
Javier Cardona | 1888923 | 2009-08-10 12:15:52 -0700 | [diff] [blame] | 522 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
Javier Cardona | 5b36583 | 2009-08-10 12:15:51 -0700 | [diff] [blame] | 523 | sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL; |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 524 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON | |
Javier Cardona | 5b36583 | 2009-08-10 12:15:51 -0700 | [diff] [blame] | 525 | BSS_CHANGED_BEACON_ENABLED | |
| 526 | BSS_CHANGED_BEACON_INT); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 527 | } |
| 528 | |
| 529 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) |
| 530 | { |
| 531 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 532 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 533 | /* |
Johannes Berg | b741343 | 2008-09-11 00:01:50 +0200 | [diff] [blame] | 534 | * If the timer fired while we waited for it, it will have |
| 535 | * requeued the work. Now the work will be running again |
| 536 | * but will not rearm the timer again because it checks |
| 537 | * whether the interface is running, which, at this point, |
| 538 | * it no longer is. |
| 539 | */ |
| 540 | cancel_work_sync(&sdata->u.mesh.work); |
| 541 | |
| 542 | /* |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 543 | * When we get here, the interface is marked down. |
| 544 | * Call synchronize_rcu() to wait for the RX path |
| 545 | * should it be using the interface and enqueuing |
| 546 | * frames at this very time on another CPU. |
| 547 | */ |
Jesper Dangaard Brouer | 4a27096 | 2009-06-26 10:45:53 +0000 | [diff] [blame] | 548 | rcu_barrier(); /* Wait for RX path and call_rcu()'s */ |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 549 | skb_queue_purge(&sdata->u.mesh.skb_queue); |
| 550 | } |
| 551 | |
| 552 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, |
| 553 | u16 stype, |
| 554 | struct ieee80211_mgmt *mgmt, |
| 555 | size_t len, |
| 556 | struct ieee80211_rx_status *rx_status) |
| 557 | { |
Johannes Berg | c6a1fa1 | 2008-10-07 12:04:32 +0200 | [diff] [blame] | 558 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 559 | struct ieee802_11_elems elems; |
| 560 | struct ieee80211_channel *channel; |
Johannes Berg | 881d948 | 2009-01-21 15:13:48 +0100 | [diff] [blame] | 561 | u32 supp_rates = 0; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 562 | size_t baselen; |
| 563 | int freq; |
| 564 | enum ieee80211_band band = rx_status->band; |
| 565 | |
| 566 | /* ignore ProbeResp to foreign address */ |
| 567 | if (stype == IEEE80211_STYPE_PROBE_RESP && |
| 568 | compare_ether_addr(mgmt->da, sdata->dev->dev_addr)) |
| 569 | return; |
| 570 | |
| 571 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
| 572 | if (baselen > len) |
| 573 | return; |
| 574 | |
| 575 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, |
| 576 | &elems); |
| 577 | |
| 578 | if (elems.ds_params && elems.ds_params_len == 1) |
| 579 | freq = ieee80211_channel_to_frequency(elems.ds_params[0]); |
| 580 | else |
| 581 | freq = rx_status->freq; |
| 582 | |
| 583 | channel = ieee80211_get_channel(local->hw.wiphy, freq); |
| 584 | |
| 585 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) |
| 586 | return; |
| 587 | |
| 588 | if (elems.mesh_id && elems.mesh_config && |
| 589 | mesh_matches_local(&elems, sdata)) { |
| 590 | supp_rates = ieee80211_sta_get_rates(local, &elems, band); |
| 591 | |
| 592 | mesh_neighbour_update(mgmt->sa, supp_rates, sdata, |
| 593 | mesh_peer_accepts_plinks(&elems)); |
| 594 | } |
| 595 | } |
| 596 | |
| 597 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, |
| 598 | struct ieee80211_mgmt *mgmt, |
| 599 | size_t len, |
| 600 | struct ieee80211_rx_status *rx_status) |
| 601 | { |
| 602 | switch (mgmt->u.action.category) { |
Rui Paulo | 0938393 | 2009-11-09 23:46:43 +0000 | [diff] [blame] | 603 | case MESH_PLINK_CATEGORY: |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 604 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); |
| 605 | break; |
| 606 | case MESH_PATH_SEL_CATEGORY: |
| 607 | mesh_rx_path_sel_frame(sdata, mgmt, len); |
| 608 | break; |
| 609 | } |
| 610 | } |
| 611 | |
| 612 | static void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
| 613 | struct sk_buff *skb) |
| 614 | { |
| 615 | struct ieee80211_rx_status *rx_status; |
| 616 | struct ieee80211_if_mesh *ifmsh; |
| 617 | struct ieee80211_mgmt *mgmt; |
| 618 | u16 stype; |
| 619 | |
| 620 | ifmsh = &sdata->u.mesh; |
| 621 | |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 622 | rx_status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 623 | mgmt = (struct ieee80211_mgmt *) skb->data; |
| 624 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; |
| 625 | |
| 626 | switch (stype) { |
| 627 | case IEEE80211_STYPE_PROBE_RESP: |
| 628 | case IEEE80211_STYPE_BEACON: |
| 629 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, |
| 630 | rx_status); |
| 631 | break; |
| 632 | case IEEE80211_STYPE_ACTION: |
| 633 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); |
| 634 | break; |
| 635 | } |
| 636 | |
| 637 | kfree_skb(skb); |
| 638 | } |
| 639 | |
| 640 | static void ieee80211_mesh_work(struct work_struct *work) |
| 641 | { |
| 642 | struct ieee80211_sub_if_data *sdata = |
| 643 | container_of(work, struct ieee80211_sub_if_data, u.mesh.work); |
| 644 | struct ieee80211_local *local = sdata->local; |
| 645 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 646 | struct sk_buff *skb; |
| 647 | |
| 648 | if (!netif_running(sdata->dev)) |
| 649 | return; |
| 650 | |
Helmut Schaa | fbe9c42 | 2009-07-23 12:14:04 +0200 | [diff] [blame] | 651 | if (local->scanning) |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 652 | return; |
| 653 | |
| 654 | while ((skb = skb_dequeue(&ifmsh->skb_queue))) |
| 655 | ieee80211_mesh_rx_queued_mgmt(sdata, skb); |
| 656 | |
| 657 | if (ifmsh->preq_queue_len && |
| 658 | time_after(jiffies, |
| 659 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) |
| 660 | mesh_path_start_discovery(sdata); |
| 661 | |
Javier Cardona | 1888923 | 2009-08-10 12:15:52 -0700 | [diff] [blame] | 662 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
| 663 | mesh_mpath_table_grow(); |
| 664 | |
| 665 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
| 666 | mesh_mpp_table_grow(); |
| 667 | |
| 668 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 669 | ieee80211_mesh_housekeeping(sdata, ifmsh); |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 670 | |
| 671 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) |
| 672 | ieee80211_mesh_rootpath(sdata); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 673 | } |
| 674 | |
| 675 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) |
| 676 | { |
| 677 | struct ieee80211_sub_if_data *sdata; |
| 678 | |
| 679 | rcu_read_lock(); |
| 680 | list_for_each_entry_rcu(sdata, &local->interfaces, list) |
| 681 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
Luis R. Rodriguez | c03e20f | 2009-08-04 15:06:26 -0700 | [diff] [blame] | 682 | ieee80211_queue_work(&local->hw, &sdata->u.mesh.work); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 683 | rcu_read_unlock(); |
| 684 | } |
| 685 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 686 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
| 687 | { |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 688 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 689 | |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 690 | INIT_WORK(&ifmsh->work, ieee80211_mesh_work); |
| 691 | setup_timer(&ifmsh->housekeeping_timer, |
| 692 | ieee80211_mesh_housekeeping_timer, |
| 693 | (unsigned long) sdata); |
| 694 | skb_queue_head_init(&sdata->u.mesh.skb_queue); |
| 695 | |
| 696 | ifmsh->mshcfg.dot11MeshRetryTimeout = MESH_RET_T; |
| 697 | ifmsh->mshcfg.dot11MeshConfirmTimeout = MESH_CONF_T; |
| 698 | ifmsh->mshcfg.dot11MeshHoldingTimeout = MESH_HOLD_T; |
| 699 | ifmsh->mshcfg.dot11MeshMaxRetries = MESH_MAX_RETR; |
| 700 | ifmsh->mshcfg.dot11MeshTTL = MESH_TTL; |
| 701 | ifmsh->mshcfg.auto_open_plinks = true; |
| 702 | ifmsh->mshcfg.dot11MeshMaxPeerLinks = |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 703 | MESH_MAX_ESTAB_PLINKS; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 704 | ifmsh->mshcfg.dot11MeshHWMPactivePathTimeout = |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 705 | MESH_PATH_TIMEOUT; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 706 | ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval = |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 707 | MESH_PREQ_MIN_INT; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 708 | ifmsh->mshcfg.dot11MeshHWMPnetDiameterTraversalTime = |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 709 | MESH_DIAM_TRAVERSAL_TIME; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 710 | ifmsh->mshcfg.dot11MeshHWMPmaxPREQretries = |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 711 | MESH_MAX_PREQ_RETRIES; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 712 | ifmsh->mshcfg.path_refresh_time = |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 713 | MESH_PATH_REFRESH_TIME; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 714 | ifmsh->mshcfg.min_discovery_timeout = |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 715 | MESH_MIN_DISCOVERY_TIMEOUT; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 716 | ifmsh->accepting_plinks = true; |
| 717 | ifmsh->preq_id = 0; |
Rui Paulo | d19b3bf | 2009-11-09 23:46:55 +0000 | [diff] [blame] | 718 | ifmsh->sn = 0; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 719 | atomic_set(&ifmsh->mpaths, 0); |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 720 | mesh_rmc_init(sdata); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 721 | ifmsh->last_preq = jiffies; |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 722 | /* Allocate all mesh structures when creating the first mesh interface. */ |
| 723 | if (!mesh_allocated) |
| 724 | ieee80211s_init(); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 725 | mesh_ids_set_default(ifmsh); |
| 726 | setup_timer(&ifmsh->mesh_path_timer, |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 727 | ieee80211_mesh_path_timer, |
| 728 | (unsigned long) sdata); |
Rui Paulo | e304bfd | 2009-11-09 23:46:56 +0000 | [diff] [blame] | 729 | setup_timer(&ifmsh->mesh_path_root_timer, |
| 730 | ieee80211_mesh_path_root_timer, |
| 731 | (unsigned long) sdata); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 732 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
| 733 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); |
| 734 | } |
| 735 | |
| 736 | ieee80211_rx_result |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 737 | 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] | 738 | { |
| 739 | struct ieee80211_local *local = sdata->local; |
| 740 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 741 | struct ieee80211_mgmt *mgmt; |
| 742 | u16 fc; |
| 743 | |
| 744 | if (skb->len < 24) |
| 745 | return RX_DROP_MONITOR; |
| 746 | |
| 747 | mgmt = (struct ieee80211_mgmt *) skb->data; |
| 748 | fc = le16_to_cpu(mgmt->frame_control); |
| 749 | |
| 750 | switch (fc & IEEE80211_FCTL_STYPE) { |
Johannes Berg | a43816d | 2009-07-10 11:39:26 +0200 | [diff] [blame] | 751 | case IEEE80211_STYPE_ACTION: |
| 752 | if (skb->len < IEEE80211_MIN_ACTION_SIZE) |
| 753 | return RX_DROP_MONITOR; |
| 754 | /* fall through */ |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 755 | case IEEE80211_STYPE_PROBE_RESP: |
| 756 | case IEEE80211_STYPE_BEACON: |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 757 | skb_queue_tail(&ifmsh->skb_queue, skb); |
Luis R. Rodriguez | c03e20f | 2009-08-04 15:06:26 -0700 | [diff] [blame] | 758 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 759 | return RX_QUEUED; |
| 760 | } |
| 761 | |
| 762 | return RX_CONTINUE; |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 763 | } |