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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (c) 2008, 2009 open80211s Ltd.
4 * Authors: Luis Carlos Cobo <luisca@cozybit.com>
5 * Javier Cardona <javier@cozybit.com>
6 */
7
8#ifndef IEEE80211S_H
9#define IEEE80211S_H
10
11#include <linux/types.h>
12#include <linux/jhash.h>
13#include "ieee80211_i.h"
14
15
16/* Data structures */
17
18/**
19 * enum mesh_path_flags - mac80211 mesh path flags
20 *
21 * @MESH_PATH_ACTIVE: the mesh path can be used for forwarding
22 * @MESH_PATH_RESOLVING: the discovery process is running for this mesh path
23 * @MESH_PATH_SN_VALID: the mesh path contains a valid destination sequence
24 * number
25 * @MESH_PATH_FIXED: the mesh path has been manually set and should not be
26 * modified
27 * @MESH_PATH_RESOLVED: the mesh path can has been resolved
28 * @MESH_PATH_REQ_QUEUED: there is an unsent path request for this destination
29 * already queued up, waiting for the discovery process to start.
30 * @MESH_PATH_DELETED: the mesh path has been deleted and should no longer
31 * be used
32 *
33 * MESH_PATH_RESOLVED is used by the mesh path timer to
34 * decide when to stop or cancel the mesh path discovery.
35 */
36enum mesh_path_flags {
37 MESH_PATH_ACTIVE = BIT(0),
38 MESH_PATH_RESOLVING = BIT(1),
39 MESH_PATH_SN_VALID = BIT(2),
40 MESH_PATH_FIXED = BIT(3),
41 MESH_PATH_RESOLVED = BIT(4),
42 MESH_PATH_REQ_QUEUED = BIT(5),
43 MESH_PATH_DELETED = BIT(6),
44};
45
46/**
47 * enum mesh_deferred_task_flags - mac80211 mesh deferred tasks
48 *
49 *
50 *
51 * @MESH_WORK_HOUSEKEEPING: run the periodic mesh housekeeping tasks
52 * @MESH_WORK_ROOT: the mesh root station needs to send a frame
53 * @MESH_WORK_DRIFT_ADJUST: time to compensate for clock drift relative to other
54 * mesh nodes
55 * @MESH_WORK_MBSS_CHANGED: rebuild beacon and notify driver of BSS changes
56 */
57enum mesh_deferred_task_flags {
58 MESH_WORK_HOUSEKEEPING,
59 MESH_WORK_ROOT,
60 MESH_WORK_DRIFT_ADJUST,
61 MESH_WORK_MBSS_CHANGED,
62};
63
64/**
65 * struct mesh_path - mac80211 mesh path structure
66 *
67 * @dst: mesh path destination mac address
68 * @mpp: mesh proxy mac address
69 * @rhash: rhashtable list pointer
70 * @walk_list: linked list containing all mesh_path objects.
71 * @gate_list: list pointer for known gates list
72 * @sdata: mesh subif
73 * @next_hop: mesh neighbor to which frames for this destination will be
74 * forwarded
75 * @timer: mesh path discovery timer
76 * @frame_queue: pending queue for frames sent to this destination while the
77 * path is unresolved
78 * @rcu: rcu head for freeing mesh path
79 * @sn: target sequence number
80 * @metric: current metric to this destination
81 * @hop_count: hops to destination
82 * @exp_time: in jiffies, when the path will expire or when it expired
83 * @discovery_timeout: timeout (lapse in jiffies) used for the last discovery
84 * retry
85 * @discovery_retries: number of discovery retries
86 * @flags: mesh path flags, as specified on &enum mesh_path_flags
87 * @state_lock: mesh path state lock used to protect changes to the
88 * mpath itself. No need to take this lock when adding or removing
89 * an mpath to a hash bucket on a path table.
90 * @rann_snd_addr: the RANN sender address
91 * @rann_metric: the aggregated path metric towards the root node
92 * @last_preq_to_root: Timestamp of last PREQ sent to root
93 * @is_root: the destination station of this path is a root node
94 * @is_gate: the destination station of this path is a mesh gate
95 * @path_change_count: the number of path changes to destination
96 *
97 *
98 * The dst address is unique in the mesh path table. Since the mesh_path is
99 * protected by RCU, deleting the next_hop STA must remove / substitute the
100 * mesh_path structure and wait until that is no longer reachable before
101 * destroying the STA completely.
102 */
103struct mesh_path {
104 u8 dst[ETH_ALEN];
105 u8 mpp[ETH_ALEN]; /* used for MPP or MAP */
106 struct rhash_head rhash;
107 struct hlist_node walk_list;
108 struct hlist_node gate_list;
109 struct ieee80211_sub_if_data *sdata;
110 struct sta_info __rcu *next_hop;
111 struct timer_list timer;
112 struct sk_buff_head frame_queue;
113 struct rcu_head rcu;
114 u32 sn;
115 u32 metric;
116 u8 hop_count;
117 unsigned long exp_time;
118 u32 discovery_timeout;
119 u8 discovery_retries;
120 enum mesh_path_flags flags;
121 spinlock_t state_lock;
122 u8 rann_snd_addr[ETH_ALEN];
123 u32 rann_metric;
124 unsigned long last_preq_to_root;
125 bool is_root;
126 bool is_gate;
127 u32 path_change_count;
128};
129
130/**
131 * struct mesh_table
132 *
133 * @known_gates: list of known mesh gates and their mpaths by the station. The
134 * gate's mpath may or may not be resolved and active.
135 * @gates_lock: protects updates to known_gates
136 * @rhead: the rhashtable containing struct mesh_paths, keyed by dest addr
137 * @walk_head: linked list containging all mesh_path objects
138 * @walk_lock: lock protecting walk_head
139 * @entries: number of entries in the table
140 */
141struct mesh_table {
142 struct hlist_head known_gates;
143 spinlock_t gates_lock;
144 struct rhashtable rhead;
145 struct hlist_head walk_head;
146 spinlock_t walk_lock;
147 atomic_t entries; /* Up to MAX_MESH_NEIGHBOURS */
148};
149
150/* Recent multicast cache */
151/* RMC_BUCKETS must be a power of 2, maximum 256 */
152#define RMC_BUCKETS 256
153#define RMC_QUEUE_MAX_LEN 4
154#define RMC_TIMEOUT (3 * HZ)
155
156/**
157 * struct rmc_entry - entry in the Recent Multicast Cache
158 *
159 * @seqnum: mesh sequence number of the frame
160 * @exp_time: expiration time of the entry, in jiffies
161 * @sa: source address of the frame
162 * @list: hashtable list pointer
163 *
164 * The Recent Multicast Cache keeps track of the latest multicast frames that
165 * have been received by a mesh interface and discards received multicast frames
166 * that are found in the cache.
167 */
168struct rmc_entry {
169 struct hlist_node list;
170 unsigned long exp_time;
171 u32 seqnum;
172 u8 sa[ETH_ALEN];
173};
174
175struct mesh_rmc {
176 struct hlist_head bucket[RMC_BUCKETS];
177 u32 idx_mask;
178};
179
180#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
181
182#define MESH_PATH_EXPIRE (600 * HZ)
183
184/* Default maximum number of plinks per interface */
185#define MESH_MAX_PLINKS 256
186
187/* Maximum number of paths per interface */
188#define MESH_MAX_MPATHS 1024
189
190/* Number of frames buffered per destination for unresolved destinations */
191#define MESH_FRAME_QUEUE_LEN 10
192
193/* Public interfaces */
194/* Various */
195int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
196 const u8 *da, const u8 *sa);
197unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
198 struct ieee80211s_hdr *meshhdr,
199 const char *addr4or5, const char *addr6);
200int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
201 const u8 *addr, struct ieee80211s_hdr *mesh_hdr);
202bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
203 struct ieee802_11_elems *ie);
204void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
205int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
206 struct sk_buff *skb);
207int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata,
208 struct sk_buff *skb);
209int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata,
210 struct sk_buff *skb);
211int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
212 struct sk_buff *skb);
213int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
214 struct sk_buff *skb);
215int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
216 struct sk_buff *skb);
217int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata,
218 struct sk_buff *skb);
219int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,
220 struct sk_buff *skb);
221int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata,
222 struct sk_buff *skb, u8 ie_len);
223int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata,
224 struct sk_buff *skb);
225int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata,
226 struct sk_buff *skb);
227void mesh_rmc_free(struct ieee80211_sub_if_data *sdata);
228int mesh_rmc_init(struct ieee80211_sub_if_data *sdata);
229void ieee80211s_init(void);
230void ieee80211s_update_metric(struct ieee80211_local *local,
231 struct sta_info *sta,
232 struct ieee80211_tx_status *st);
233void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata);
234void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata);
235int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
236void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata);
237void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh);
238const struct ieee80211_mesh_sync_ops *ieee80211_mesh_sync_ops_get(u8 method);
239/* wrapper for ieee80211_bss_info_change_notify() */
240void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
241 u32 changed);
242
243/* mesh power save */
244u32 ieee80211_mps_local_status_update(struct ieee80211_sub_if_data *sdata);
245u32 ieee80211_mps_set_sta_local_pm(struct sta_info *sta,
246 enum nl80211_mesh_power_mode pm);
247void ieee80211_mps_set_frame_flags(struct ieee80211_sub_if_data *sdata,
248 struct sta_info *sta,
249 struct ieee80211_hdr *hdr);
250void ieee80211_mps_sta_status_update(struct sta_info *sta);
251void ieee80211_mps_rx_h_sta_process(struct sta_info *sta,
252 struct ieee80211_hdr *hdr);
253void ieee80211_mpsp_trigger_process(u8 *qc, struct sta_info *sta,
254 bool tx, bool acked);
255void ieee80211_mps_frame_release(struct sta_info *sta,
256 struct ieee802_11_elems *elems);
257
258/* Mesh paths */
259int mesh_nexthop_lookup(struct ieee80211_sub_if_data *sdata,
260 struct sk_buff *skb);
261int mesh_nexthop_resolve(struct ieee80211_sub_if_data *sdata,
262 struct sk_buff *skb);
263void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata);
264struct mesh_path *mesh_path_lookup(struct ieee80211_sub_if_data *sdata,
265 const u8 *dst);
266struct mesh_path *mpp_path_lookup(struct ieee80211_sub_if_data *sdata,
267 const u8 *dst);
268int mpp_path_add(struct ieee80211_sub_if_data *sdata,
269 const u8 *dst, const u8 *mpp);
270struct mesh_path *
271mesh_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx);
272struct mesh_path *
273mpp_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx);
274void mesh_path_fix_nexthop(struct mesh_path *mpath, struct sta_info *next_hop);
275void mesh_path_expire(struct ieee80211_sub_if_data *sdata);
276void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
277 struct ieee80211_mgmt *mgmt, size_t len);
278struct mesh_path *
279mesh_path_add(struct ieee80211_sub_if_data *sdata, const u8 *dst);
280
281int mesh_path_add_gate(struct mesh_path *mpath);
282int mesh_path_send_to_gates(struct mesh_path *mpath);
283int mesh_gate_num(struct ieee80211_sub_if_data *sdata);
284u32 airtime_link_metric_get(struct ieee80211_local *local,
285 struct sta_info *sta);
286
287/* Mesh plinks */
288void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
289 u8 *hw_addr, struct ieee802_11_elems *ie,
290 struct ieee80211_rx_status *rx_status);
291bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
292u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
293void mesh_plink_timer(struct timer_list *t);
294void mesh_plink_broken(struct sta_info *sta);
295u32 mesh_plink_deactivate(struct sta_info *sta);
296u32 mesh_plink_open(struct sta_info *sta);
297u32 mesh_plink_block(struct sta_info *sta);
298void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
299 struct ieee80211_mgmt *mgmt, size_t len,
300 struct ieee80211_rx_status *rx_status);
301void mesh_sta_cleanup(struct sta_info *sta);
302
303/* Private interfaces */
304/* Mesh paths */
305int mesh_path_error_tx(struct ieee80211_sub_if_data *sdata,
306 u8 ttl, const u8 *target, u32 target_sn,
307 u16 target_rcode, const u8 *ra);
308void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta);
309void mesh_path_flush_pending(struct mesh_path *mpath);
310void mesh_path_tx_pending(struct mesh_path *mpath);
311int mesh_pathtbl_init(struct ieee80211_sub_if_data *sdata);
312void mesh_pathtbl_unregister(struct ieee80211_sub_if_data *sdata);
313int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr);
314void mesh_path_timer(struct timer_list *t);
315void mesh_path_flush_by_nexthop(struct sta_info *sta);
316void mesh_path_discard_frame(struct ieee80211_sub_if_data *sdata,
317 struct sk_buff *skb);
318void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata);
319
320bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt);
321
322#ifdef CONFIG_MAC80211_MESH
323static inline
324u32 mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata)
325{
326 atomic_inc(&sdata->u.mesh.estab_plinks);
327 return mesh_accept_plinks_update(sdata) | BSS_CHANGED_BEACON;
328}
329
330static inline
331u32 mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata)
332{
333 atomic_dec(&sdata->u.mesh.estab_plinks);
334 return mesh_accept_plinks_update(sdata) | BSS_CHANGED_BEACON;
335}
336
337static inline int mesh_plink_free_count(struct ieee80211_sub_if_data *sdata)
338{
339 return sdata->u.mesh.mshcfg.dot11MeshMaxPeerLinks -
340 atomic_read(&sdata->u.mesh.estab_plinks);
341}
342
343static inline bool mesh_plink_availables(struct ieee80211_sub_if_data *sdata)
344{
345 return (min_t(long, mesh_plink_free_count(sdata),
346 MESH_MAX_PLINKS - sdata->local->num_sta)) > 0;
347}
348
349static inline void mesh_path_activate(struct mesh_path *mpath)
350{
351 mpath->flags |= MESH_PATH_ACTIVE | MESH_PATH_RESOLVED;
352}
353
354static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
355{
356 return sdata->u.mesh.mesh_pp_id == IEEE80211_PATH_PROTOCOL_HWMP;
357}
358
359void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
360void mesh_sync_adjust_tsf(struct ieee80211_sub_if_data *sdata);
361void ieee80211s_stop(void);
362#else
363static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
364{ return false; }
365static inline void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
366{}
367static inline void ieee80211s_stop(void) {}
368#endif
369
370#endif /* IEEE80211S_H */
1/*
2 * Copyright (c) 2008, 2009 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
11#ifndef IEEE80211S_H
12#define IEEE80211S_H
13
14#include <linux/types.h>
15#include <linux/jhash.h>
16#include "ieee80211_i.h"
17
18
19/* Data structures */
20
21/**
22 * enum mesh_path_flags - mac80211 mesh path flags
23 *
24 *
25 *
26 * @MESH_PATH_ACTIVE: the mesh path can be used for forwarding
27 * @MESH_PATH_RESOLVING: the discovery process is running for this mesh path
28 * @MESH_PATH_SN_VALID: the mesh path contains a valid destination sequence
29 * number
30 * @MESH_PATH_FIXED: the mesh path has been manually set and should not be
31 * modified
32 * @MESH_PATH_RESOLVED: the mesh path can has been resolved
33 * @MESH_PATH_REQ_QUEUED: there is an unsent path request for this destination
34 * already queued up, waiting for the discovery process to start.
35 *
36 * MESH_PATH_RESOLVED is used by the mesh path timer to
37 * decide when to stop or cancel the mesh path discovery.
38 */
39enum mesh_path_flags {
40 MESH_PATH_ACTIVE = BIT(0),
41 MESH_PATH_RESOLVING = BIT(1),
42 MESH_PATH_SN_VALID = BIT(2),
43 MESH_PATH_FIXED = BIT(3),
44 MESH_PATH_RESOLVED = BIT(4),
45 MESH_PATH_REQ_QUEUED = BIT(5),
46};
47
48/**
49 * enum mesh_deferred_task_flags - mac80211 mesh deferred tasks
50 *
51 *
52 *
53 * @MESH_WORK_HOUSEKEEPING: run the periodic mesh housekeeping tasks
54 * @MESH_WORK_GROW_MPATH_TABLE: the mesh path table is full and needs
55 * to grow.
56 * @MESH_WORK_GROW_MPP_TABLE: the mesh portals table is full and needs to
57 * grow
58 * @MESH_WORK_ROOT: the mesh root station needs to send a frame
59 * @MESH_WORK_DRIFT_ADJUST: time to compensate for clock drift relative to other
60 * mesh nodes
61 * @MESH_WORK_MBSS_CHANGED: rebuild beacon and notify driver of BSS changes
62 */
63enum mesh_deferred_task_flags {
64 MESH_WORK_HOUSEKEEPING,
65 MESH_WORK_GROW_MPATH_TABLE,
66 MESH_WORK_GROW_MPP_TABLE,
67 MESH_WORK_ROOT,
68 MESH_WORK_DRIFT_ADJUST,
69 MESH_WORK_MBSS_CHANGED,
70};
71
72/**
73 * struct mesh_path - mac80211 mesh path structure
74 *
75 * @dst: mesh path destination mac address
76 * @sdata: mesh subif
77 * @next_hop: mesh neighbor to which frames for this destination will be
78 * forwarded
79 * @timer: mesh path discovery timer
80 * @frame_queue: pending queue for frames sent to this destination while the
81 * path is unresolved
82 * @sn: target sequence number
83 * @metric: current metric to this destination
84 * @hop_count: hops to destination
85 * @exp_time: in jiffies, when the path will expire or when it expired
86 * @discovery_timeout: timeout (lapse in jiffies) used for the last discovery
87 * retry
88 * @discovery_retries: number of discovery retries
89 * @flags: mesh path flags, as specified on &enum mesh_path_flags
90 * @state_lock: mesh path state lock used to protect changes to the
91 * mpath itself. No need to take this lock when adding or removing
92 * an mpath to a hash bucket on a path table.
93 * @rann_snd_addr: the RANN sender address
94 * @rann_metric: the aggregated path metric towards the root node
95 * @last_preq_to_root: Timestamp of last PREQ sent to root
96 * @is_root: the destination station of this path is a root node
97 * @is_gate: the destination station of this path is a mesh gate
98 *
99 *
100 * The combination of dst and sdata is unique in the mesh path table. Since the
101 * next_hop STA is only protected by RCU as well, deleting the STA must also
102 * remove/substitute the mesh_path structure and wait until that is no longer
103 * reachable before destroying the STA completely.
104 */
105struct mesh_path {
106 u8 dst[ETH_ALEN];
107 u8 mpp[ETH_ALEN]; /* used for MPP or MAP */
108 struct ieee80211_sub_if_data *sdata;
109 struct sta_info __rcu *next_hop;
110 struct timer_list timer;
111 struct sk_buff_head frame_queue;
112 struct rcu_head rcu;
113 u32 sn;
114 u32 metric;
115 u8 hop_count;
116 unsigned long exp_time;
117 u32 discovery_timeout;
118 u8 discovery_retries;
119 enum mesh_path_flags flags;
120 spinlock_t state_lock;
121 u8 rann_snd_addr[ETH_ALEN];
122 u32 rann_metric;
123 unsigned long last_preq_to_root;
124 bool is_root;
125 bool is_gate;
126};
127
128/**
129 * struct mesh_table
130 *
131 * @hash_buckets: array of hash buckets of the table
132 * @hashwlock: array of locks to protect write operations, one per bucket
133 * @hash_mask: 2^size_order - 1, used to compute hash idx
134 * @hash_rnd: random value used for hash computations
135 * @entries: number of entries in the table
136 * @free_node: function to free nodes of the table
137 * @copy_node: function to copy nodes of the table
138 * @size_order: determines size of the table, there will be 2^size_order hash
139 * buckets
140 * @known_gates: list of known mesh gates and their mpaths by the station. The
141 * gate's mpath may or may not be resolved and active.
142 *
143 * rcu_head: RCU head to free the table
144 */
145struct mesh_table {
146 /* Number of buckets will be 2^N */
147 struct hlist_head *hash_buckets;
148 spinlock_t *hashwlock; /* One per bucket, for add/del */
149 unsigned int hash_mask; /* (2^size_order) - 1 */
150 __u32 hash_rnd; /* Used for hash generation */
151 atomic_t entries; /* Up to MAX_MESH_NEIGHBOURS */
152 void (*free_node) (struct hlist_node *p, bool free_leafs);
153 int (*copy_node) (struct hlist_node *p, struct mesh_table *newtbl);
154 int size_order;
155 struct hlist_head *known_gates;
156 spinlock_t gates_lock;
157
158 struct rcu_head rcu_head;
159};
160
161/* Recent multicast cache */
162/* RMC_BUCKETS must be a power of 2, maximum 256 */
163#define RMC_BUCKETS 256
164#define RMC_QUEUE_MAX_LEN 4
165#define RMC_TIMEOUT (3 * HZ)
166
167/**
168 * struct rmc_entry - entry in the Recent Multicast Cache
169 *
170 * @seqnum: mesh sequence number of the frame
171 * @exp_time: expiration time of the entry, in jiffies
172 * @sa: source address of the frame
173 *
174 * The Recent Multicast Cache keeps track of the latest multicast frames that
175 * have been received by a mesh interface and discards received multicast frames
176 * that are found in the cache.
177 */
178struct rmc_entry {
179 struct list_head list;
180 u32 seqnum;
181 unsigned long exp_time;
182 u8 sa[ETH_ALEN];
183};
184
185struct mesh_rmc {
186 struct list_head bucket[RMC_BUCKETS];
187 u32 idx_mask;
188};
189
190#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
191
192#define MESH_PATH_EXPIRE (600 * HZ)
193
194/* Default maximum number of plinks per interface */
195#define MESH_MAX_PLINKS 256
196
197/* Maximum number of paths per interface */
198#define MESH_MAX_MPATHS 1024
199
200/* Number of frames buffered per destination for unresolved destinations */
201#define MESH_FRAME_QUEUE_LEN 10
202
203/* Public interfaces */
204/* Various */
205int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
206 const u8 *da, const u8 *sa);
207unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
208 struct ieee80211s_hdr *meshhdr,
209 const char *addr4or5, const char *addr6);
210int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
211 const u8 *addr, struct ieee80211s_hdr *mesh_hdr);
212bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
213 struct ieee802_11_elems *ie);
214void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
215int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
216 struct sk_buff *skb);
217int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata,
218 struct sk_buff *skb);
219int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata,
220 struct sk_buff *skb);
221int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
222 struct sk_buff *skb);
223int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
224 struct sk_buff *skb);
225int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
226 struct sk_buff *skb);
227int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata,
228 struct sk_buff *skb);
229int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,
230 struct sk_buff *skb);
231void mesh_rmc_free(struct ieee80211_sub_if_data *sdata);
232int mesh_rmc_init(struct ieee80211_sub_if_data *sdata);
233void ieee80211s_init(void);
234void ieee80211s_update_metric(struct ieee80211_local *local,
235 struct sta_info *sta, struct sk_buff *skb);
236void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata);
237int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
238void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata);
239void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh);
240const struct ieee80211_mesh_sync_ops *ieee80211_mesh_sync_ops_get(u8 method);
241/* wrapper for ieee80211_bss_info_change_notify() */
242void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
243 u32 changed);
244
245/* mesh power save */
246u32 ieee80211_mps_local_status_update(struct ieee80211_sub_if_data *sdata);
247u32 ieee80211_mps_set_sta_local_pm(struct sta_info *sta,
248 enum nl80211_mesh_power_mode pm);
249void ieee80211_mps_set_frame_flags(struct ieee80211_sub_if_data *sdata,
250 struct sta_info *sta,
251 struct ieee80211_hdr *hdr);
252void ieee80211_mps_sta_status_update(struct sta_info *sta);
253void ieee80211_mps_rx_h_sta_process(struct sta_info *sta,
254 struct ieee80211_hdr *hdr);
255void ieee80211_mpsp_trigger_process(u8 *qc, struct sta_info *sta,
256 bool tx, bool acked);
257void ieee80211_mps_frame_release(struct sta_info *sta,
258 struct ieee802_11_elems *elems);
259
260/* Mesh paths */
261int mesh_nexthop_lookup(struct ieee80211_sub_if_data *sdata,
262 struct sk_buff *skb);
263int mesh_nexthop_resolve(struct ieee80211_sub_if_data *sdata,
264 struct sk_buff *skb);
265void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata);
266struct mesh_path *mesh_path_lookup(struct ieee80211_sub_if_data *sdata,
267 const u8 *dst);
268struct mesh_path *mpp_path_lookup(struct ieee80211_sub_if_data *sdata,
269 const u8 *dst);
270int mpp_path_add(struct ieee80211_sub_if_data *sdata,
271 const u8 *dst, const u8 *mpp);
272struct mesh_path *
273mesh_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx);
274struct mesh_path *
275mpp_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx);
276void mesh_path_fix_nexthop(struct mesh_path *mpath, struct sta_info *next_hop);
277void mesh_path_expire(struct ieee80211_sub_if_data *sdata);
278void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
279 struct ieee80211_mgmt *mgmt, size_t len);
280struct mesh_path *
281mesh_path_add(struct ieee80211_sub_if_data *sdata, const u8 *dst);
282
283int mesh_path_add_gate(struct mesh_path *mpath);
284int mesh_path_send_to_gates(struct mesh_path *mpath);
285int mesh_gate_num(struct ieee80211_sub_if_data *sdata);
286
287/* Mesh plinks */
288void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
289 u8 *hw_addr, struct ieee802_11_elems *ie);
290bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
291u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
292void mesh_plink_broken(struct sta_info *sta);
293u32 mesh_plink_deactivate(struct sta_info *sta);
294u32 mesh_plink_open(struct sta_info *sta);
295u32 mesh_plink_block(struct sta_info *sta);
296void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
297 struct ieee80211_mgmt *mgmt, size_t len,
298 struct ieee80211_rx_status *rx_status);
299void mesh_sta_cleanup(struct sta_info *sta);
300
301/* Private interfaces */
302/* Mesh tables */
303void mesh_mpath_table_grow(void);
304void mesh_mpp_table_grow(void);
305/* Mesh paths */
306int mesh_path_error_tx(struct ieee80211_sub_if_data *sdata,
307 u8 ttl, const u8 *target, u32 target_sn,
308 u16 target_rcode, const u8 *ra);
309void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta);
310void mesh_path_flush_pending(struct mesh_path *mpath);
311void mesh_path_tx_pending(struct mesh_path *mpath);
312int mesh_pathtbl_init(void);
313void mesh_pathtbl_unregister(void);
314int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr);
315void mesh_path_timer(unsigned long data);
316void mesh_path_flush_by_nexthop(struct sta_info *sta);
317void mesh_path_discard_frame(struct ieee80211_sub_if_data *sdata,
318 struct sk_buff *skb);
319void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata);
320
321bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt);
322extern int mesh_paths_generation;
323extern int mpp_paths_generation;
324
325#ifdef CONFIG_MAC80211_MESH
326static inline
327u32 mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata)
328{
329 atomic_inc(&sdata->u.mesh.estab_plinks);
330 return mesh_accept_plinks_update(sdata) | BSS_CHANGED_BEACON;
331}
332
333static inline
334u32 mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata)
335{
336 atomic_dec(&sdata->u.mesh.estab_plinks);
337 return mesh_accept_plinks_update(sdata) | BSS_CHANGED_BEACON;
338}
339
340static inline int mesh_plink_free_count(struct ieee80211_sub_if_data *sdata)
341{
342 return sdata->u.mesh.mshcfg.dot11MeshMaxPeerLinks -
343 atomic_read(&sdata->u.mesh.estab_plinks);
344}
345
346static inline bool mesh_plink_availables(struct ieee80211_sub_if_data *sdata)
347{
348 return (min_t(long, mesh_plink_free_count(sdata),
349 MESH_MAX_PLINKS - sdata->local->num_sta)) > 0;
350}
351
352static inline void mesh_path_activate(struct mesh_path *mpath)
353{
354 mpath->flags |= MESH_PATH_ACTIVE | MESH_PATH_RESOLVED;
355}
356
357static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
358{
359 return sdata->u.mesh.mesh_pp_id == IEEE80211_PATH_PROTOCOL_HWMP;
360}
361
362void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
363void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata);
364void ieee80211s_stop(void);
365#else
366static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
367{ return false; }
368static inline void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
369{}
370static inline void ieee80211s_stop(void) {}
371#endif
372
373#endif /* IEEE80211S_H */