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00011 #ifndef IEEE80211S_H
00012 #define IEEE80211S_H
00013
00014 #include <linux/types.h>
00015 #include <linux/jhash.h>
00016 #include "ieee80211_i.h"
00017
00018
00019
00020
00029 enum mesh_config_capab_flags {
00030 MESHCONF_CAPAB_ACCEPT_PLINKS = BIT(0),
00031 MESHCONF_CAPAB_FORWARDING = BIT(3),
00032 MESHCONF_CAPAB_TBTT_ADJUSTING = BIT(5),
00033 };
00034
00053 enum mesh_path_flags {
00054 MESH_PATH_ACTIVE = BIT(0),
00055 MESH_PATH_RESOLVING = BIT(1),
00056 MESH_PATH_SN_VALID = BIT(2),
00057 MESH_PATH_FIXED = BIT(3),
00058 MESH_PATH_RESOLVED = BIT(4),
00059 MESH_PATH_REQ_QUEUED = BIT(5),
00060 };
00061
00076 enum mesh_deferred_task_flags {
00077 MESH_WORK_HOUSEKEEPING,
00078 MESH_WORK_GROW_MPATH_TABLE,
00079 MESH_WORK_GROW_MPP_TABLE,
00080 MESH_WORK_ROOT,
00081 MESH_WORK_DRIFT_ADJUST,
00082 };
00083
00116 struct mesh_path {
00117 u8 dst[ETH_ALEN];
00118 u8 mpp[ETH_ALEN];
00119 struct ieee80211_sub_if_data *sdata;
00120 struct sta_info __rcu *next_hop;
00121 struct timer_list timer;
00122 struct sk_buff_head frame_queue;
00123 struct rcu_head rcu;
00124 u32 sn;
00125 u32 metric;
00126 u8 hop_count;
00127 unsigned long exp_time;
00128 u32 discovery_timeout;
00129 u8 discovery_retries;
00130 enum mesh_path_flags flags;
00131 spinlock_t state_lock;
00132 u8 rann_snd_addr[ETH_ALEN];
00133 u32 rann_metric;
00134 bool is_root;
00135 bool is_gate;
00136 };
00137
00157 struct mesh_table {
00158
00159 struct hlist_head *hash_buckets;
00160 spinlock_t *hashwlock;
00161 unsigned int hash_mask;
00162 __u32 hash_rnd;
00163 atomic_t entries;
00164 void (*free_node) (struct hlist_node *p, bool free_leafs);
00165 int (*copy_node) (struct hlist_node *p, struct mesh_table *newtbl);
00166 int size_order;
00167 int mean_chain_len;
00168 struct hlist_head *known_gates;
00169 spinlock_t gates_lock;
00170
00171 struct rcu_head rcu_head;
00172 };
00173
00174
00175
00176 #define RMC_BUCKETS 256
00177 #define RMC_QUEUE_MAX_LEN 4
00178 #define RMC_TIMEOUT (3 * HZ)
00179
00191 struct rmc_entry {
00192 struct list_head list;
00193 u32 seqnum;
00194 unsigned long exp_time;
00195 u8 sa[ETH_ALEN];
00196 };
00197
00198 struct mesh_rmc {
00199 struct rmc_entry bucket[RMC_BUCKETS];
00200 u32 idx_mask;
00201 };
00202
00203 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
00204 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
00205
00206 #define MESH_DEFAULT_BEACON_INTERVAL 1000
00207
00208 #define MESH_PATH_EXPIRE (600 * HZ)
00209
00210
00211 #define MESH_MAX_PLINKS 256
00212
00213
00214 #define MESH_MAX_MPATHS 1024
00215
00216
00217
00218 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
00219 const u8 *da, const u8 *sa);
00220 int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr,
00221 struct ieee80211_sub_if_data *sdata, char *addr4or5,
00222 char *addr6);
00223 int mesh_rmc_check(u8 *addr, struct ieee80211s_hdr *mesh_hdr,
00224 struct ieee80211_sub_if_data *sdata);
00225 bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
00226 struct ieee802_11_elems *ie);
00227 void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
00228 void mesh_mgmt_ies_add(struct sk_buff *skb,
00229 struct ieee80211_sub_if_data *sdata);
00230 int mesh_add_meshconf_ie(struct sk_buff *skb,
00231 struct ieee80211_sub_if_data *sdata);
00232 int mesh_add_meshid_ie(struct sk_buff *skb,
00233 struct ieee80211_sub_if_data *sdata);
00234 int mesh_add_rsn_ie(struct sk_buff *skb,
00235 struct ieee80211_sub_if_data *sdata);
00236 int mesh_add_vendor_ies(struct sk_buff *skb,
00237 struct ieee80211_sub_if_data *sdata);
00238 int mesh_add_ds_params_ie(struct sk_buff *skb,
00239 struct ieee80211_sub_if_data *sdata);
00240 int mesh_add_ht_cap_ie(struct sk_buff *skb,
00241 struct ieee80211_sub_if_data *sdata);
00242 int mesh_add_ht_oper_ie(struct sk_buff *skb,
00243 struct ieee80211_sub_if_data *sdata);
00244 void mesh_rmc_free(struct ieee80211_sub_if_data *sdata);
00245 int mesh_rmc_init(struct ieee80211_sub_if_data *sdata);
00246 void ieee80211s_init(void);
00247 void ieee80211s_update_metric(struct ieee80211_local *local,
00248 struct sta_info *stainfo, struct sk_buff *skb);
00249 void ieee80211s_stop(void);
00250 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata);
00251 void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
00252 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata);
00253 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh);
00254 struct ieee80211_mesh_sync_ops *ieee80211_mesh_sync_ops_get(u8 method);
00255
00256
00257 int mesh_nexthop_lookup(struct sk_buff *skb,
00258 struct ieee80211_sub_if_data *sdata);
00259 int mesh_nexthop_resolve(struct sk_buff *skb,
00260 struct ieee80211_sub_if_data *sdata);
00261 void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata);
00262 struct mesh_path *mesh_path_lookup(u8 *dst,
00263 struct ieee80211_sub_if_data *sdata);
00264 struct mesh_path *mpp_path_lookup(u8 *dst,
00265 struct ieee80211_sub_if_data *sdata);
00266 int mpp_path_add(u8 *dst, u8 *mpp, struct ieee80211_sub_if_data *sdata);
00267 struct mesh_path *mesh_path_lookup_by_idx(int idx,
00268 struct ieee80211_sub_if_data *sdata);
00269 void mesh_path_fix_nexthop(struct mesh_path *mpath, struct sta_info *next_hop);
00270 void mesh_path_expire(struct ieee80211_sub_if_data *sdata);
00271 void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
00272 struct ieee80211_mgmt *mgmt, size_t len);
00273 int mesh_path_add(u8 *dst, struct ieee80211_sub_if_data *sdata);
00274
00275 int mesh_path_add_gate(struct mesh_path *mpath);
00276 int mesh_path_send_to_gates(struct mesh_path *mpath);
00277 int mesh_gate_num(struct ieee80211_sub_if_data *sdata);
00278
00279 void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
00280 u8 *hw_addr,
00281 struct ieee802_11_elems *ie);
00282 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
00283 void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
00284 void mesh_plink_broken(struct sta_info *sta);
00285 void mesh_plink_deactivate(struct sta_info *sta);
00286 int mesh_plink_open(struct sta_info *sta);
00287 void mesh_plink_block(struct sta_info *sta);
00288 void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
00289 struct ieee80211_mgmt *mgmt, size_t len,
00290 struct ieee80211_rx_status *rx_status);
00291
00292
00293
00294 void mesh_mpath_table_grow(void);
00295 void mesh_mpp_table_grow(void);
00296
00297 int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn, __le16 target_rcode,
00298 const u8 *ra, struct ieee80211_sub_if_data *sdata);
00299 void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta);
00300 void mesh_path_flush_pending(struct mesh_path *mpath);
00301 void mesh_path_tx_pending(struct mesh_path *mpath);
00302 int mesh_pathtbl_init(void);
00303 void mesh_pathtbl_unregister(void);
00304 int mesh_path_del(u8 *addr, struct ieee80211_sub_if_data *sdata);
00305 void mesh_path_timer(unsigned long data);
00306 void mesh_path_flush_by_nexthop(struct sta_info *sta);
00307 void mesh_path_discard_frame(struct sk_buff *skb,
00308 struct ieee80211_sub_if_data *sdata);
00309 void mesh_path_quiesce(struct ieee80211_sub_if_data *sdata);
00310 void mesh_path_restart(struct ieee80211_sub_if_data *sdata);
00311 void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata);
00312
00313 bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt);
00314 extern int mesh_paths_generation;
00315
00316 #ifdef CONFIG_MAC80211_MESH
00317 extern int mesh_allocated;
00318
00319 static inline int mesh_plink_free_count(struct ieee80211_sub_if_data *sdata)
00320 {
00321 return sdata->u.mesh.mshcfg.dot11MeshMaxPeerLinks -
00322 atomic_read(&sdata->u.mesh.mshstats.estab_plinks);
00323 }
00324
00325 static inline bool mesh_plink_availables(struct ieee80211_sub_if_data *sdata)
00326 {
00327 return (min_t(long, mesh_plink_free_count(sdata),
00328 MESH_MAX_PLINKS - sdata->local->num_sta)) > 0;
00329 }
00330
00331 static inline void mesh_path_activate(struct mesh_path *mpath)
00332 {
00333 mpath->flags |= MESH_PATH_ACTIVE | MESH_PATH_RESOLVED;
00334 }
00335
00336 static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
00337 {
00338 return sdata->u.mesh.mesh_pp_id == IEEE80211_PATH_PROTOCOL_HWMP;
00339 }
00340
00341 void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local);
00342
00343 void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata);
00344 void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata);
00345 void mesh_plink_quiesce(struct sta_info *sta);
00346 void mesh_plink_restart(struct sta_info *sta);
00347 void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
00348 void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata);
00349 #else
00350 #define mesh_allocated 0
00351 static inline void
00352 ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) {}
00353 static inline void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata)
00354 {}
00355 static inline void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata)
00356 {}
00357 static inline void mesh_plink_quiesce(struct sta_info *sta) {}
00358 static inline void mesh_plink_restart(struct sta_info *sta) {}
00359 static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
00360 { return false; }
00361 static inline void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
00362 {}
00363 #endif
00364
00365 #endif