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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 * @MESH_PATH_ACTIVE: the mesh path can be used for forwarding
25 * @MESH_PATH_RESOLVING: the discovery process is running for this mesh path
26 * @MESH_PATH_SN_VALID: the mesh path contains a valid destination sequence
27 * number
28 * @MESH_PATH_FIXED: the mesh path has been manually set and should not be
29 * modified
30 * @MESH_PATH_RESOLVED: the mesh path can has been resolved
31 * @MESH_PATH_REQ_QUEUED: there is an unsent path request for this destination
32 * already queued up, waiting for the discovery process to start.
33 * @MESH_PATH_DELETED: the mesh path has been deleted and should no longer
34 * be used
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 MESH_PATH_DELETED = BIT(6),
47};
48
49/**
50 * enum mesh_deferred_task_flags - mac80211 mesh deferred tasks
51 *
52 *
53 *
54 * @MESH_WORK_HOUSEKEEPING: run the periodic mesh housekeeping tasks
55 * @MESH_WORK_ROOT: the mesh root station needs to send a frame
56 * @MESH_WORK_DRIFT_ADJUST: time to compensate for clock drift relative to other
57 * mesh nodes
58 * @MESH_WORK_MBSS_CHANGED: rebuild beacon and notify driver of BSS changes
59 */
60enum mesh_deferred_task_flags {
61 MESH_WORK_HOUSEKEEPING,
62 MESH_WORK_ROOT,
63 MESH_WORK_DRIFT_ADJUST,
64 MESH_WORK_MBSS_CHANGED,
65};
66
67/**
68 * struct mesh_path - mac80211 mesh path structure
69 *
70 * @dst: mesh path destination mac address
71 * @mpp: mesh proxy mac address
72 * @rhash: rhashtable list pointer
73 * @gate_list: list pointer for known gates list
74 * @sdata: mesh subif
75 * @next_hop: mesh neighbor to which frames for this destination will be
76 * forwarded
77 * @timer: mesh path discovery timer
78 * @frame_queue: pending queue for frames sent to this destination while the
79 * path is unresolved
80 * @rcu: rcu head for freeing mesh path
81 * @sn: target sequence number
82 * @metric: current metric to this destination
83 * @hop_count: hops to destination
84 * @exp_time: in jiffies, when the path will expire or when it expired
85 * @discovery_timeout: timeout (lapse in jiffies) used for the last discovery
86 * retry
87 * @discovery_retries: number of discovery retries
88 * @flags: mesh path flags, as specified on &enum mesh_path_flags
89 * @state_lock: mesh path state lock used to protect changes to the
90 * mpath itself. No need to take this lock when adding or removing
91 * an mpath to a hash bucket on a path table.
92 * @rann_snd_addr: the RANN sender address
93 * @rann_metric: the aggregated path metric towards the root node
94 * @last_preq_to_root: Timestamp of last PREQ sent to root
95 * @is_root: the destination station of this path is a root node
96 * @is_gate: the destination station of this path is a mesh gate
97 *
98 *
99 * The dst address is unique in the mesh path table. Since the mesh_path is
100 * protected by RCU, deleting the next_hop STA must remove / substitute the
101 * mesh_path structure and wait until that is no longer reachable before
102 * destroying the STA completely.
103 */
104struct mesh_path {
105 u8 dst[ETH_ALEN];
106 u8 mpp[ETH_ALEN]; /* used for MPP or MAP */
107 struct rhash_head rhash;
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};
128
129/**
130 * struct mesh_table
131 *
132 * @known_gates: list of known mesh gates and their mpaths by the station. The
133 * gate's mpath may or may not be resolved and active.
134 * @gates_lock: protects updates to known_gates
135 * @rhead: the rhashtable containing struct mesh_paths, keyed by dest addr
136 * @entries: number of entries in the table
137 */
138struct mesh_table {
139 struct hlist_head known_gates;
140 spinlock_t gates_lock;
141 struct rhashtable rhead;
142 atomic_t entries; /* Up to MAX_MESH_NEIGHBOURS */
143};
144
145/* Recent multicast cache */
146/* RMC_BUCKETS must be a power of 2, maximum 256 */
147#define RMC_BUCKETS 256
148#define RMC_QUEUE_MAX_LEN 4
149#define RMC_TIMEOUT (3 * HZ)
150
151/**
152 * struct rmc_entry - entry in the Recent Multicast Cache
153 *
154 * @seqnum: mesh sequence number of the frame
155 * @exp_time: expiration time of the entry, in jiffies
156 * @sa: source address of the frame
157 * @list: hashtable list pointer
158 *
159 * The Recent Multicast Cache keeps track of the latest multicast frames that
160 * have been received by a mesh interface and discards received multicast frames
161 * that are found in the cache.
162 */
163struct rmc_entry {
164 struct hlist_node list;
165 unsigned long exp_time;
166 u32 seqnum;
167 u8 sa[ETH_ALEN];
168};
169
170struct mesh_rmc {
171 struct hlist_head bucket[RMC_BUCKETS];
172 u32 idx_mask;
173};
174
175#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
176
177#define MESH_PATH_EXPIRE (600 * HZ)
178
179/* Default maximum number of plinks per interface */
180#define MESH_MAX_PLINKS 256
181
182/* Maximum number of paths per interface */
183#define MESH_MAX_MPATHS 1024
184
185/* Number of frames buffered per destination for unresolved destinations */
186#define MESH_FRAME_QUEUE_LEN 10
187
188/* Public interfaces */
189/* Various */
190int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
191 const u8 *da, const u8 *sa);
192unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
193 struct ieee80211s_hdr *meshhdr,
194 const char *addr4or5, const char *addr6);
195int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
196 const u8 *addr, struct ieee80211s_hdr *mesh_hdr);
197bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
198 struct ieee802_11_elems *ie);
199void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
200int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
201 struct sk_buff *skb);
202int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata,
203 struct sk_buff *skb);
204int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata,
205 struct sk_buff *skb);
206int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
207 struct sk_buff *skb);
208int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
209 struct sk_buff *skb);
210int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
211 struct sk_buff *skb);
212int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata,
213 struct sk_buff *skb);
214int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,
215 struct sk_buff *skb);
216void mesh_rmc_free(struct ieee80211_sub_if_data *sdata);
217int mesh_rmc_init(struct ieee80211_sub_if_data *sdata);
218void ieee80211s_init(void);
219void ieee80211s_update_metric(struct ieee80211_local *local,
220 struct sta_info *sta, struct sk_buff *skb);
221void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata);
222void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata);
223int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
224void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata);
225void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh);
226const struct ieee80211_mesh_sync_ops *ieee80211_mesh_sync_ops_get(u8 method);
227/* wrapper for ieee80211_bss_info_change_notify() */
228void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
229 u32 changed);
230
231/* mesh power save */
232u32 ieee80211_mps_local_status_update(struct ieee80211_sub_if_data *sdata);
233u32 ieee80211_mps_set_sta_local_pm(struct sta_info *sta,
234 enum nl80211_mesh_power_mode pm);
235void ieee80211_mps_set_frame_flags(struct ieee80211_sub_if_data *sdata,
236 struct sta_info *sta,
237 struct ieee80211_hdr *hdr);
238void ieee80211_mps_sta_status_update(struct sta_info *sta);
239void ieee80211_mps_rx_h_sta_process(struct sta_info *sta,
240 struct ieee80211_hdr *hdr);
241void ieee80211_mpsp_trigger_process(u8 *qc, struct sta_info *sta,
242 bool tx, bool acked);
243void ieee80211_mps_frame_release(struct sta_info *sta,
244 struct ieee802_11_elems *elems);
245
246/* Mesh paths */
247int mesh_nexthop_lookup(struct ieee80211_sub_if_data *sdata,
248 struct sk_buff *skb);
249int mesh_nexthop_resolve(struct ieee80211_sub_if_data *sdata,
250 struct sk_buff *skb);
251void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata);
252struct mesh_path *mesh_path_lookup(struct ieee80211_sub_if_data *sdata,
253 const u8 *dst);
254struct mesh_path *mpp_path_lookup(struct ieee80211_sub_if_data *sdata,
255 const u8 *dst);
256int mpp_path_add(struct ieee80211_sub_if_data *sdata,
257 const u8 *dst, const u8 *mpp);
258struct mesh_path *
259mesh_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx);
260struct mesh_path *
261mpp_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx);
262void mesh_path_fix_nexthop(struct mesh_path *mpath, struct sta_info *next_hop);
263void mesh_path_expire(struct ieee80211_sub_if_data *sdata);
264void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
265 struct ieee80211_mgmt *mgmt, size_t len);
266struct mesh_path *
267mesh_path_add(struct ieee80211_sub_if_data *sdata, const u8 *dst);
268
269int mesh_path_add_gate(struct mesh_path *mpath);
270int mesh_path_send_to_gates(struct mesh_path *mpath);
271int mesh_gate_num(struct ieee80211_sub_if_data *sdata);
272
273/* Mesh plinks */
274void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
275 u8 *hw_addr, struct ieee802_11_elems *ie);
276bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
277u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
278void mesh_plink_broken(struct sta_info *sta);
279u32 mesh_plink_deactivate(struct sta_info *sta);
280u32 mesh_plink_open(struct sta_info *sta);
281u32 mesh_plink_block(struct sta_info *sta);
282void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
283 struct ieee80211_mgmt *mgmt, size_t len,
284 struct ieee80211_rx_status *rx_status);
285void mesh_sta_cleanup(struct sta_info *sta);
286
287/* Private interfaces */
288/* Mesh paths */
289int mesh_path_error_tx(struct ieee80211_sub_if_data *sdata,
290 u8 ttl, const u8 *target, u32 target_sn,
291 u16 target_rcode, const u8 *ra);
292void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta);
293void mesh_path_flush_pending(struct mesh_path *mpath);
294void mesh_path_tx_pending(struct mesh_path *mpath);
295int mesh_pathtbl_init(struct ieee80211_sub_if_data *sdata);
296void mesh_pathtbl_unregister(struct ieee80211_sub_if_data *sdata);
297int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr);
298void mesh_path_timer(unsigned long data);
299void mesh_path_flush_by_nexthop(struct sta_info *sta);
300void mesh_path_discard_frame(struct ieee80211_sub_if_data *sdata,
301 struct sk_buff *skb);
302void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata);
303
304bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt);
305
306#ifdef CONFIG_MAC80211_MESH
307static inline
308u32 mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata)
309{
310 atomic_inc(&sdata->u.mesh.estab_plinks);
311 return mesh_accept_plinks_update(sdata) | BSS_CHANGED_BEACON;
312}
313
314static inline
315u32 mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata)
316{
317 atomic_dec(&sdata->u.mesh.estab_plinks);
318 return mesh_accept_plinks_update(sdata) | BSS_CHANGED_BEACON;
319}
320
321static inline int mesh_plink_free_count(struct ieee80211_sub_if_data *sdata)
322{
323 return sdata->u.mesh.mshcfg.dot11MeshMaxPeerLinks -
324 atomic_read(&sdata->u.mesh.estab_plinks);
325}
326
327static inline bool mesh_plink_availables(struct ieee80211_sub_if_data *sdata)
328{
329 return (min_t(long, mesh_plink_free_count(sdata),
330 MESH_MAX_PLINKS - sdata->local->num_sta)) > 0;
331}
332
333static inline void mesh_path_activate(struct mesh_path *mpath)
334{
335 mpath->flags |= MESH_PATH_ACTIVE | MESH_PATH_RESOLVED;
336}
337
338static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
339{
340 return sdata->u.mesh.mesh_pp_id == IEEE80211_PATH_PROTOCOL_HWMP;
341}
342
343void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
344void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata);
345void ieee80211s_stop(void);
346#else
347static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
348{ return false; }
349static inline void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
350{}
351static inline void ieee80211s_stop(void) {}
352#endif
353
354#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 <asm/unaligned.h>
17#include "ieee80211_i.h"
18
19
20/* Data structures */
21
22/**
23 * enum mesh_path_flags - mac80211 mesh path flags
24 *
25 *
26 *
27 * @MESH_PATH_ACTIVE: the mesh path can be used for forwarding
28 * @MESH_PATH_RESOLVING: the discovery process is running for this mesh path
29 * @MESH_PATH_SN_VALID: the mesh path contains a valid destination sequence
30 * number
31 * @MESH_PATH_FIXED: the mesh path has been manually set and should not be
32 * modified
33 * @MESH_PATH_RESOLVED: the mesh path can has been resolved
34 *
35 * MESH_PATH_RESOLVED is used by the mesh path timer to
36 * decide when to stop or cancel the mesh path discovery.
37 */
38enum mesh_path_flags {
39 MESH_PATH_ACTIVE = BIT(0),
40 MESH_PATH_RESOLVING = BIT(1),
41 MESH_PATH_SN_VALID = BIT(2),
42 MESH_PATH_FIXED = BIT(3),
43 MESH_PATH_RESOLVED = BIT(4),
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_GROW_MPATH_TABLE: the mesh path table is full and needs
53 * to grow.
54 * @MESH_WORK_GROW_MPP_TABLE: the mesh portals table is full and needs to
55 * grow
56 * @MESH_WORK_ROOT: the mesh root station needs to send a frame
57 */
58enum mesh_deferred_task_flags {
59 MESH_WORK_HOUSEKEEPING,
60 MESH_WORK_GROW_MPATH_TABLE,
61 MESH_WORK_GROW_MPP_TABLE,
62 MESH_WORK_ROOT,
63};
64
65/**
66 * struct mesh_path - mac80211 mesh path structure
67 *
68 * @dst: mesh path destination mac address
69 * @sdata: mesh subif
70 * @next_hop: mesh neighbor to which frames for this destination will be
71 * forwarded
72 * @timer: mesh path discovery timer
73 * @frame_queue: pending queue for frames sent to this destination while the
74 * path is unresolved
75 * @sn: target sequence number
76 * @metric: current metric to this destination
77 * @hop_count: hops to destination
78 * @exp_time: in jiffies, when the path will expire or when it expired
79 * @discovery_timeout: timeout (lapse in jiffies) used for the last discovery
80 * retry
81 * @discovery_retries: number of discovery retries
82 * @flags: mesh path flags, as specified on &enum mesh_path_flags
83 * @state_lock: mesh path state lock
84 *
85 *
86 * The combination of dst and sdata is unique in the mesh path table. Since the
87 * next_hop STA is only protected by RCU as well, deleting the STA must also
88 * remove/substitute the mesh_path structure and wait until that is no longer
89 * reachable before destroying the STA completely.
90 */
91struct mesh_path {
92 u8 dst[ETH_ALEN];
93 u8 mpp[ETH_ALEN]; /* used for MPP or MAP */
94 struct ieee80211_sub_if_data *sdata;
95 struct sta_info __rcu *next_hop;
96 struct timer_list timer;
97 struct sk_buff_head frame_queue;
98 struct rcu_head rcu;
99 u32 sn;
100 u32 metric;
101 u8 hop_count;
102 unsigned long exp_time;
103 u32 discovery_timeout;
104 u8 discovery_retries;
105 enum mesh_path_flags flags;
106 spinlock_t state_lock;
107};
108
109/**
110 * struct mesh_table
111 *
112 * @hash_buckets: array of hash buckets of the table
113 * @hashwlock: array of locks to protect write operations, one per bucket
114 * @hash_mask: 2^size_order - 1, used to compute hash idx
115 * @hash_rnd: random value used for hash computations
116 * @entries: number of entries in the table
117 * @free_node: function to free nodes of the table
118 * @copy_node: function to copy nodes of the table
119 * @size_order: determines size of the table, there will be 2^size_order hash
120 * buckets
121 * @mean_chain_len: maximum average length for the hash buckets' list, if it is
122 * reached, the table will grow
123 * rcu_head: RCU head to free the table
124 */
125struct mesh_table {
126 /* Number of buckets will be 2^N */
127 struct hlist_head *hash_buckets;
128 spinlock_t *hashwlock; /* One per bucket, for add/del */
129 unsigned int hash_mask; /* (2^size_order) - 1 */
130 __u32 hash_rnd; /* Used for hash generation */
131 atomic_t entries; /* Up to MAX_MESH_NEIGHBOURS */
132 void (*free_node) (struct hlist_node *p, bool free_leafs);
133 int (*copy_node) (struct hlist_node *p, struct mesh_table *newtbl);
134 int size_order;
135 int mean_chain_len;
136
137 struct rcu_head rcu_head;
138};
139
140/* Recent multicast cache */
141/* RMC_BUCKETS must be a power of 2, maximum 256 */
142#define RMC_BUCKETS 256
143#define RMC_QUEUE_MAX_LEN 4
144#define RMC_TIMEOUT (3 * HZ)
145
146/**
147 * struct rmc_entry - entry in the Recent Multicast Cache
148 *
149 * @seqnum: mesh sequence number of the frame
150 * @exp_time: expiration time of the entry, in jiffies
151 * @sa: source address of the frame
152 *
153 * The Recent Multicast Cache keeps track of the latest multicast frames that
154 * have been received by a mesh interface and discards received multicast frames
155 * that are found in the cache.
156 */
157struct rmc_entry {
158 struct list_head list;
159 u32 seqnum;
160 unsigned long exp_time;
161 u8 sa[ETH_ALEN];
162};
163
164struct mesh_rmc {
165 struct rmc_entry bucket[RMC_BUCKETS];
166 u32 idx_mask;
167};
168
169
170#define MESH_DEFAULT_BEACON_INTERVAL 1000 /* in 1024 us units */
171
172#define MESH_PATH_EXPIRE (600 * HZ)
173
174/* Default maximum number of plinks per interface */
175#define MESH_MAX_PLINKS 256
176
177/* Maximum number of paths per interface */
178#define MESH_MAX_MPATHS 1024
179
180/* Pending ANA approval */
181#define MESH_PATH_SEL_ACTION 0
182
183/* PERR reason codes */
184#define PEER_RCODE_UNSPECIFIED 11
185#define PERR_RCODE_NO_ROUTE 12
186#define PERR_RCODE_DEST_UNREACH 13
187
188/* Public interfaces */
189/* Various */
190int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
191 const u8 *da, const u8 *sa);
192int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr,
193 struct ieee80211_sub_if_data *sdata, char *addr4or5,
194 char *addr6);
195int mesh_rmc_check(u8 *addr, struct ieee80211s_hdr *mesh_hdr,
196 struct ieee80211_sub_if_data *sdata);
197bool mesh_matches_local(struct ieee802_11_elems *ie,
198 struct ieee80211_sub_if_data *sdata);
199void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
200void mesh_mgmt_ies_add(struct sk_buff *skb,
201 struct ieee80211_sub_if_data *sdata);
202void mesh_rmc_free(struct ieee80211_sub_if_data *sdata);
203int mesh_rmc_init(struct ieee80211_sub_if_data *sdata);
204void ieee80211s_init(void);
205void ieee80211s_update_metric(struct ieee80211_local *local,
206 struct sta_info *stainfo, struct sk_buff *skb);
207void ieee80211s_stop(void);
208void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata);
209void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
210void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata);
211void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh);
212
213/* Mesh paths */
214int mesh_nexthop_lookup(struct sk_buff *skb,
215 struct ieee80211_sub_if_data *sdata);
216void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata);
217struct mesh_path *mesh_path_lookup(u8 *dst,
218 struct ieee80211_sub_if_data *sdata);
219struct mesh_path *mpp_path_lookup(u8 *dst,
220 struct ieee80211_sub_if_data *sdata);
221int mpp_path_add(u8 *dst, u8 *mpp, struct ieee80211_sub_if_data *sdata);
222struct mesh_path *mesh_path_lookup_by_idx(int idx,
223 struct ieee80211_sub_if_data *sdata);
224void mesh_path_fix_nexthop(struct mesh_path *mpath, struct sta_info *next_hop);
225void mesh_path_expire(struct ieee80211_sub_if_data *sdata);
226void mesh_path_flush(struct ieee80211_sub_if_data *sdata);
227void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
228 struct ieee80211_mgmt *mgmt, size_t len);
229int mesh_path_add(u8 *dst, struct ieee80211_sub_if_data *sdata);
230/* Mesh plinks */
231void mesh_neighbour_update(u8 *hw_addr, u32 rates,
232 struct ieee80211_sub_if_data *sdata,
233 struct ieee802_11_elems *ie);
234bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
235void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
236void mesh_plink_broken(struct sta_info *sta);
237void mesh_plink_deactivate(struct sta_info *sta);
238int mesh_plink_open(struct sta_info *sta);
239void mesh_plink_block(struct sta_info *sta);
240void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
241 struct ieee80211_mgmt *mgmt, size_t len,
242 struct ieee80211_rx_status *rx_status);
243
244/* Private interfaces */
245/* Mesh tables */
246void mesh_mpath_table_grow(void);
247void mesh_mpp_table_grow(void);
248/* Mesh paths */
249int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn, __le16 target_rcode,
250 const u8 *ra, struct ieee80211_sub_if_data *sdata);
251void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta);
252void mesh_path_flush_pending(struct mesh_path *mpath);
253void mesh_path_tx_pending(struct mesh_path *mpath);
254int mesh_pathtbl_init(void);
255void mesh_pathtbl_unregister(void);
256int mesh_path_del(u8 *addr, struct ieee80211_sub_if_data *sdata);
257void mesh_path_timer(unsigned long data);
258void mesh_path_flush_by_nexthop(struct sta_info *sta);
259void mesh_path_discard_frame(struct sk_buff *skb,
260 struct ieee80211_sub_if_data *sdata);
261void mesh_path_quiesce(struct ieee80211_sub_if_data *sdata);
262void mesh_path_restart(struct ieee80211_sub_if_data *sdata);
263void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata);
264
265extern int mesh_paths_generation;
266
267#ifdef CONFIG_MAC80211_MESH
268extern int mesh_allocated;
269
270static inline int mesh_plink_free_count(struct ieee80211_sub_if_data *sdata)
271{
272 return sdata->u.mesh.mshcfg.dot11MeshMaxPeerLinks -
273 atomic_read(&sdata->u.mesh.mshstats.estab_plinks);
274}
275
276static inline bool mesh_plink_availables(struct ieee80211_sub_if_data *sdata)
277{
278 return (min_t(long, mesh_plink_free_count(sdata),
279 MESH_MAX_PLINKS - sdata->local->num_sta)) > 0;
280}
281
282static inline void mesh_path_activate(struct mesh_path *mpath)
283{
284 mpath->flags |= MESH_PATH_ACTIVE | MESH_PATH_RESOLVED;
285}
286
287static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
288{
289 return sdata->u.mesh.mesh_pp_id == IEEE80211_PATH_PROTOCOL_HWMP;
290}
291
292void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local);
293
294void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata);
295void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata);
296void mesh_plink_quiesce(struct sta_info *sta);
297void mesh_plink_restart(struct sta_info *sta);
298#else
299#define mesh_allocated 0
300static inline void
301ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) {}
302static inline void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata)
303{}
304static inline void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata)
305{}
306static inline void mesh_plink_quiesce(struct sta_info *sta) {}
307static inline void mesh_plink_restart(struct sta_info *sta) {}
308static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
309{ return false; }
310#endif
311
312#endif /* IEEE80211S_H */