[deliverable/linux.git] / net / mac80211 / mesh.h

/*
 * Copyright (c) 2008, 2009 open80211s Ltd.
 * Authors:    Luis Carlos Cobo <luisca@cozybit.com>
 *             Javier Cardona <javier@cozybit.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef IEEE80211S_H
#define IEEE80211S_H

#include <linux/types.h>
#include <linux/jhash.h>
#include "ieee80211_i.h"


/* Data structures */

/**
 * enum mesh_path_flags - mac80211 mesh path flags
 *
 *
 *
 * @MESH_PATH_ACTIVE: the mesh path can be used for forwarding
 * @MESH_PATH_RESOLVING: the discovery process is running for this mesh path
 * @MESH_PATH_SN_VALID: the mesh path contains a valid destination sequence
 * 	number
 * @MESH_PATH_FIXED: the mesh path has been manually set and should not be
 * 	modified
 * @MESH_PATH_RESOLVED: the mesh path can has been resolved
 * @MESH_PATH_REQ_QUEUED: there is an unsent path request for this destination
 * already queued up, waiting for the discovery process to start.
 *
 * MESH_PATH_RESOLVED is used by the mesh path timer to
 * decide when to stop or cancel the mesh path discovery.
 */
enum mesh_path_flags {
	MESH_PATH_ACTIVE =	BIT(0),
	MESH_PATH_RESOLVING =	BIT(1),
	MESH_PATH_SN_VALID =	BIT(2),
	MESH_PATH_FIXED	=	BIT(3),
	MESH_PATH_RESOLVED =	BIT(4),
	MESH_PATH_REQ_QUEUED =	BIT(5),
};

/**
 * enum mesh_deferred_task_flags - mac80211 mesh deferred tasks
 *
 *
 *
 * @MESH_WORK_HOUSEKEEPING: run the periodic mesh housekeeping tasks
 * @MESH_WORK_GROW_MPATH_TABLE: the mesh path table is full and needs
 * to grow.
 * @MESH_WORK_GROW_MPP_TABLE: the mesh portals table is full and needs to
 * grow
 * @MESH_WORK_ROOT: the mesh root station needs to send a frame
 */
enum mesh_deferred_task_flags {
	MESH_WORK_HOUSEKEEPING,
	MESH_WORK_GROW_MPATH_TABLE,
	MESH_WORK_GROW_MPP_TABLE,
	MESH_WORK_ROOT,
};

/**
 * struct mesh_path - mac80211 mesh path structure
 *
 * @dst: mesh path destination mac address
 * @sdata: mesh subif
 * @next_hop: mesh neighbor to which frames for this destination will be
 * 	forwarded
 * @timer: mesh path discovery timer
 * @frame_queue: pending queue for frames sent to this destination while the
 * 	path is unresolved
 * @sn: target sequence number
 * @metric: current metric to this destination
 * @hop_count: hops to destination
 * @exp_time: in jiffies, when the path will expire or when it expired
 * @discovery_timeout: timeout (lapse in jiffies) used for the last discovery
 * 	retry
 * @discovery_retries: number of discovery retries
 * @flags: mesh path flags, as specified on &enum mesh_path_flags
 * @state_lock: mesh path state lock used to protect changes to the
 * mpath itself.  No need to take this lock when adding or removing
 * an mpath to a hash bucket on a path table.
 * @rann_snd_addr: the RANN sender address
 * @is_root: the destination station of this path is a root node
 * @is_gate: the destination station of this path is a mesh gate
 *
 *
 * The combination of dst and sdata is unique in the mesh path table. Since the
 * next_hop STA is only protected by RCU as well, deleting the STA must also
 * remove/substitute the mesh_path structure and wait until that is no longer
 * reachable before destroying the STA completely.
 */
struct mesh_path {
	u8 dst[ETH_ALEN];
	u8 mpp[ETH_ALEN];	/* used for MPP or MAP */
	struct ieee80211_sub_if_data *sdata;
	struct sta_info __rcu *next_hop;
	struct timer_list timer;
	struct sk_buff_head frame_queue;
	struct rcu_head rcu;
	u32 sn;
	u32 metric;
	u8 hop_count;
	unsigned long exp_time;
	u32 discovery_timeout;
	u8 discovery_retries;
	enum mesh_path_flags flags;
	spinlock_t state_lock;
	u8 rann_snd_addr[ETH_ALEN];
	bool is_root;
	bool is_gate;
};

/**
 * struct mesh_table
 *
 * @hash_buckets: array of hash buckets of the table
 * @hashwlock: array of locks to protect write operations, one per bucket
 * @hash_mask: 2^size_order - 1, used to compute hash idx
 * @hash_rnd: random value used for hash computations
 * @entries: number of entries in the table
 * @free_node: function to free nodes of the table
 * @copy_node: function to copy nodes of the table
 * @size_order: determines size of the table, there will be 2^size_order hash
 *	buckets
 * @mean_chain_len: maximum average length for the hash buckets' list, if it is
 *	reached, the table will grow
 * @known_gates: list of known mesh gates and their mpaths by the station. The
 * gate's mpath may or may not be resolved and active.
 *
 * rcu_head: RCU head to free the table
 */
struct mesh_table {
	/* Number of buckets will be 2^N */
	struct hlist_head *hash_buckets;
	spinlock_t *hashwlock;		/* One per bucket, for add/del */
	unsigned int hash_mask;		/* (2^size_order) - 1 */
	__u32 hash_rnd;			/* Used for hash generation */
	atomic_t entries;		/* Up to MAX_MESH_NEIGHBOURS */
	void (*free_node) (struct hlist_node *p, bool free_leafs);
	int (*copy_node) (struct hlist_node *p, struct mesh_table *newtbl);
	int size_order;
	int mean_chain_len;
	struct hlist_head *known_gates;
	spinlock_t gates_lock;

	struct rcu_head rcu_head;
};

/* Recent multicast cache */
/* RMC_BUCKETS must be a power of 2, maximum 256 */
#define RMC_BUCKETS		256
#define RMC_QUEUE_MAX_LEN	4
#define RMC_TIMEOUT		(3 * HZ)

/**
 * struct rmc_entry - entry in the Recent Multicast Cache
 *
 * @seqnum: mesh sequence number of the frame
 * @exp_time: expiration time of the entry, in jiffies
 * @sa: source address of the frame
 *
 * The Recent Multicast Cache keeps track of the latest multicast frames that
 * have been received by a mesh interface and discards received multicast frames
 * that are found in the cache.
 */
struct rmc_entry {
	struct list_head list;
	u32 seqnum;
	unsigned long exp_time;
	u8 sa[ETH_ALEN];
};

struct mesh_rmc {
	struct rmc_entry bucket[RMC_BUCKETS];
	u32 idx_mask;
};

#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)

#define MESH_DEFAULT_BEACON_INTERVAL		1000 	/* in 1024 us units */

#define MESH_PATH_EXPIRE (600 * HZ)

/* Default maximum number of plinks per interface */
#define MESH_MAX_PLINKS		256

/* Maximum number of paths per interface */
#define MESH_MAX_MPATHS		1024

/* Public interfaces */
/* Various */
int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
				  const u8 *da, const u8 *sa);
int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr,
		struct ieee80211_sub_if_data *sdata, char *addr4or5,
		char *addr6);
int mesh_rmc_check(u8 *addr, struct ieee80211s_hdr *mesh_hdr,
		struct ieee80211_sub_if_data *sdata);
bool mesh_matches_local(struct ieee802_11_elems *ie,
		struct ieee80211_sub_if_data *sdata);
void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
void mesh_mgmt_ies_add(struct sk_buff *skb,
		struct ieee80211_sub_if_data *sdata);
int mesh_add_meshconf_ie(struct sk_buff *skb,
			 struct ieee80211_sub_if_data *sdata);
int mesh_add_meshid_ie(struct sk_buff *skb,
		       struct ieee80211_sub_if_data *sdata);
int mesh_add_rsn_ie(struct sk_buff *skb,
		    struct ieee80211_sub_if_data *sdata);
int mesh_add_vendor_ies(struct sk_buff *skb,
			struct ieee80211_sub_if_data *sdata);
int mesh_add_ds_params_ie(struct sk_buff *skb,
			  struct ieee80211_sub_if_data *sdata);
int mesh_add_ht_cap_ie(struct sk_buff *skb,
		       struct ieee80211_sub_if_data *sdata);
int mesh_add_ht_oper_ie(struct sk_buff *skb,
			struct ieee80211_sub_if_data *sdata);
void mesh_rmc_free(struct ieee80211_sub_if_data *sdata);
int mesh_rmc_init(struct ieee80211_sub_if_data *sdata);
void ieee80211s_init(void);
void ieee80211s_update_metric(struct ieee80211_local *local,
		struct sta_info *stainfo, struct sk_buff *skb);
void ieee80211s_stop(void);
void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata);
void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata);
void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh);

/* Mesh paths */
int mesh_nexthop_lookup(struct sk_buff *skb,
		struct ieee80211_sub_if_data *sdata);
int mesh_nexthop_resolve(struct sk_buff *skb,
			 struct ieee80211_sub_if_data *sdata);
void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata);
struct mesh_path *mesh_path_lookup(u8 *dst,
		struct ieee80211_sub_if_data *sdata);
struct mesh_path *mpp_path_lookup(u8 *dst,
				  struct ieee80211_sub_if_data *sdata);
int mpp_path_add(u8 *dst, u8 *mpp, struct ieee80211_sub_if_data *sdata);
struct mesh_path *mesh_path_lookup_by_idx(int idx,
		struct ieee80211_sub_if_data *sdata);
void mesh_path_fix_nexthop(struct mesh_path *mpath, struct sta_info *next_hop);
void mesh_path_expire(struct ieee80211_sub_if_data *sdata);
void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
		struct ieee80211_mgmt *mgmt, size_t len);
int mesh_path_add(u8 *dst, struct ieee80211_sub_if_data *sdata);

int mesh_path_add_gate(struct mesh_path *mpath);
int mesh_path_send_to_gates(struct mesh_path *mpath);
int mesh_gate_num(struct ieee80211_sub_if_data *sdata);
/* Mesh plinks */
void mesh_neighbour_update(u8 *hw_addr, u32 rates,
		struct ieee80211_sub_if_data *sdata,
		struct ieee802_11_elems *ie);
bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
void mesh_plink_broken(struct sta_info *sta);
void mesh_plink_deactivate(struct sta_info *sta);
int mesh_plink_open(struct sta_info *sta);
void mesh_plink_block(struct sta_info *sta);
void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
			 struct ieee80211_mgmt *mgmt, size_t len,
			 struct ieee80211_rx_status *rx_status);

/* Private interfaces */
/* Mesh tables */
void mesh_mpath_table_grow(void);
void mesh_mpp_table_grow(void);
/* Mesh paths */
int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn, __le16 target_rcode,
		       const u8 *ra, struct ieee80211_sub_if_data *sdata);
void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta);
void mesh_path_flush_pending(struct mesh_path *mpath);
void mesh_path_tx_pending(struct mesh_path *mpath);
int mesh_pathtbl_init(void);
void mesh_pathtbl_unregister(void);
int mesh_path_del(u8 *addr, struct ieee80211_sub_if_data *sdata);
void mesh_path_timer(unsigned long data);
void mesh_path_flush_by_nexthop(struct sta_info *sta);
void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
void mesh_path_discard_frame(struct sk_buff *skb,
		struct ieee80211_sub_if_data *sdata);
void mesh_path_quiesce(struct ieee80211_sub_if_data *sdata);
void mesh_path_restart(struct ieee80211_sub_if_data *sdata);
void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata);

bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt);
extern int mesh_paths_generation;

#ifdef CONFIG_MAC80211_MESH
extern int mesh_allocated;

static inline int mesh_plink_free_count(struct ieee80211_sub_if_data *sdata)
{
	return sdata->u.mesh.mshcfg.dot11MeshMaxPeerLinks -
	       atomic_read(&sdata->u.mesh.mshstats.estab_plinks);
}

static inline bool mesh_plink_availables(struct ieee80211_sub_if_data *sdata)
{
	return (min_t(long, mesh_plink_free_count(sdata),
		   MESH_MAX_PLINKS - sdata->local->num_sta)) > 0;
}

static inline void mesh_path_activate(struct mesh_path *mpath)
{
	mpath->flags |= MESH_PATH_ACTIVE | MESH_PATH_RESOLVED;
}

static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
{
	return sdata->u.mesh.mesh_pp_id == IEEE80211_PATH_PROTOCOL_HWMP;
}

void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local);

void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata);
void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata);
void mesh_plink_quiesce(struct sta_info *sta);
void mesh_plink_restart(struct sta_info *sta);
#else
#define mesh_allocated	0
static inline void
ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) {}
static inline void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata)
{}
static inline void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata)
{}
static inline void mesh_plink_quiesce(struct sta_info *sta) {}
static inline void mesh_plink_restart(struct sta_info *sta) {}
static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
{ return false; }
#endif

#endif /* IEEE80211S_H */
Commit	Line	Data
ccf80ddf	1	/*
264d9b7d	2	* Copyright (c) 2008, 2009 open80211s Ltd.
ccf80ddf LCC	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
902acc78	14	#include <linux/types.h>
ccf80ddf	15	#include <linux/jhash.h>
902acc78	16	#include "ieee80211_i.h"
ccf80ddf	17
ccf80ddf LCC	18
	19	/* Data structures */
	20
	21	/**
	22	* enum mesh_path_flags - mac80211 mesh path flags
	23	*
	24	*
	25	*
eb80ed8d RR	26	* @MESH_PATH_ACTIVE: the mesh path can be used for forwarding
eb80ed8d RR	27	* @MESH_PATH_RESOLVING: the discovery process is running for this mesh path
d19b3bf6	28	* @MESH_PATH_SN_VALID: the mesh path contains a valid destination sequence
ccf80ddf LCC	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
f3011cf9 JC	33	* @MESH_PATH_REQ_QUEUED: there is an unsent path request for this destination
f3011cf9 JC	34	* already queued up, waiting for the discovery process to start.
ccf80ddf	35	*
eb80ed8d	36	* MESH_PATH_RESOLVED is used by the mesh path timer to
ccf80ddf LCC	37	* decide when to stop or cancel the mesh path discovery.
	38	*/
	39	enum mesh_path_flags {
	40	MESH_PATH_ACTIVE = BIT(0),
	41	MESH_PATH_RESOLVING = BIT(1),
d19b3bf6	42	MESH_PATH_SN_VALID = BIT(2),
ccf80ddf LCC	43	MESH_PATH_FIXED = BIT(3),
ccf80ddf LCC	44	MESH_PATH_RESOLVED = BIT(4),
f3011cf9	45	MESH_PATH_REQ_QUEUED = BIT(5),
ccf80ddf LCC	46	};
ccf80ddf LCC	47
18889231 JC	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
e304bfd3	58	* @MESH_WORK_ROOT: the mesh root station needs to send a frame
18889231 JC	59	*/
	60	enum mesh_deferred_task_flags {
	61	MESH_WORK_HOUSEKEEPING,
	62	MESH_WORK_GROW_MPATH_TABLE,
	63	MESH_WORK_GROW_MPP_TABLE,
e304bfd3	64	MESH_WORK_ROOT,
18889231 JC	65	};
18889231 JC	66
ccf80ddf LCC	67	/**
	68	* struct mesh_path - mac80211 mesh path structure
	69	*
	70	* @dst: mesh path destination mac address
f698d856	71	* @sdata: mesh subif
ccf80ddf LCC	72	* @next_hop: mesh neighbor to which frames for this destination will be
	73	* forwarded
	74	* @timer: mesh path discovery timer
	75	* @frame_queue: pending queue for frames sent to this destination while the
	76	* path is unresolved
d19b3bf6	77	* @sn: target sequence number
ccf80ddf LCC	78	* @metric: current metric to this destination
	79	* @hop_count: hops to destination
	80	* @exp_time: in jiffies, when the path will expire or when it expired
	81	* @discovery_timeout: timeout (lapse in jiffies) used for the last discovery
	82	* retry
	83	* @discovery_retries: number of discovery retries
	84	* @flags: mesh path flags, as specified on &enum mesh_path_flags
f5e50cd0 JC	85	* @state_lock: mesh path state lock used to protect changes to the
	86	* mpath itself. No need to take this lock when adding or removing
	87	* an mpath to a hash bucket on a path table.
3d045a54 CYY	88	* @rann_snd_addr: the RANN sender address
3d045a54 CYY	89	* @is_root: the destination station of this path is a root node
5ee68e5b	90	* @is_gate: the destination station of this path is a mesh gate
ccf80ddf LCC	91	*
ccf80ddf LCC	92	*
f698d856	93	* The combination of dst and sdata is unique in the mesh path table. Since the
d0709a65 JB	94	* next_hop STA is only protected by RCU as well, deleting the STA must also
	95	* remove/substitute the mesh_path structure and wait until that is no longer
	96	* reachable before destroying the STA completely.
ccf80ddf LCC	97	*/
	98	struct mesh_path {
	99	u8 dst[ETH_ALEN];
79617dee	100	u8 mpp[ETH_ALEN]; /* used for MPP or MAP */
f698d856	101	struct ieee80211_sub_if_data *sdata;
40b275b6	102	struct sta_info __rcu *next_hop;
ccf80ddf LCC	103	struct timer_list timer;
	104	struct sk_buff_head frame_queue;
	105	struct rcu_head rcu;
d19b3bf6	106	u32 sn;
ccf80ddf LCC	107	u32 metric;
	108	u8 hop_count;
	109	unsigned long exp_time;
	110	u32 discovery_timeout;
	111	u8 discovery_retries;
	112	enum mesh_path_flags flags;
	113	spinlock_t state_lock;
3d045a54 CYY	114	u8 rann_snd_addr[ETH_ALEN];
3d045a54 CYY	115	bool is_root;
5ee68e5b	116	bool is_gate;
ccf80ddf LCC	117	};
	118
	119	/**
	120	* struct mesh_table
	121	*
	122	* @hash_buckets: array of hash buckets of the table
	123	* @hashwlock: array of locks to protect write operations, one per bucket
	124	* @hash_mask: 2^size_order - 1, used to compute hash idx
	125	* @hash_rnd: random value used for hash computations
	126	* @entries: number of entries in the table
	127	* @free_node: function to free nodes of the table
eef35c2d	128	* @copy_node: function to copy nodes of the table
ccf80ddf LCC	129	* @size_order: determines size of the table, there will be 2^size_order hash
	130	* buckets
	131	* @mean_chain_len: maximum average length for the hash buckets' list, if it is
	132	* reached, the table will grow
5ee68e5b JC	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	*
1928ecab	136	* rcu_head: RCU head to free the table
ccf80ddf LCC	137	*/
	138	struct mesh_table {
	139	/* Number of buckets will be 2^N */
	140	struct hlist_head *hash_buckets;
	141	spinlock_t hashwlock; / One per bucket, for add/del */
	142	unsigned int hash_mask; /* (2^size_order) - 1 */
	143	__u32 hash_rnd; /* Used for hash generation */
	144	atomic_t entries; /* Up to MAX_MESH_NEIGHBOURS */
	145	void (free_node) (struct hlist_node p, bool free_leafs);
4caf86c6	146	int (copy_node) (struct hlist_node p, struct mesh_table *newtbl);
ccf80ddf LCC	147	int size_order;
ccf80ddf LCC	148	int mean_chain_len;
5ee68e5b JC	149	struct hlist_head *known_gates;
5ee68e5b JC	150	spinlock_t gates_lock;
1928ecab JB	151
1928ecab JB	152	struct rcu_head rcu_head;
ccf80ddf LCC	153	};
	154
	155	/* Recent multicast cache */
	156	/* RMC_BUCKETS must be a power of 2, maximum 256 */
	157	#define RMC_BUCKETS 256
	158	#define RMC_QUEUE_MAX_LEN 4
	159	#define RMC_TIMEOUT (3 * HZ)
	160
	161	/**
	162	* struct rmc_entry - entry in the Recent Multicast Cache
	163	*
	164	* @seqnum: mesh sequence number of the frame
	165	* @exp_time: expiration time of the entry, in jiffies
	166	* @sa: source address of the frame
	167	*
	168	* The Recent Multicast Cache keeps track of the latest multicast frames that
	169	* have been received by a mesh interface and discards received multicast frames
	170	* that are found in the cache.
	171	*/
	172	struct rmc_entry {
	173	struct list_head list;
	174	u32 seqnum;
	175	unsigned long exp_time;
	176	u8 sa[ETH_ALEN];
	177	};
	178
	179	struct mesh_rmc {
	180	struct rmc_entry bucket[RMC_BUCKETS];
51ceddad	181	u32 idx_mask;
ccf80ddf LCC	182	};
ccf80ddf LCC	183
25d49e4d TP	184	#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
25d49e4d TP	185	#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
ccf80ddf	186
5b365834	187	#define MESH_DEFAULT_BEACON_INTERVAL 1000 /* in 1024 us units */
ccf80ddf	188
ccf80ddf LCC	189	#define MESH_PATH_EXPIRE (600 * HZ)
ccf80ddf LCC	190
ccf80ddf LCC	191	/* Default maximum number of plinks per interface */
	192	#define MESH_MAX_PLINKS 256
	193
	194	/* Maximum number of paths per interface */
	195	#define MESH_MAX_MPATHS 1024
	196
ccf80ddf LCC	197	/* Public interfaces */
ccf80ddf LCC	198	/* Various */
3c5772a5	199	int ieee80211_fill_mesh_addresses(struct ieee80211_hdr hdr, __le16 fc,
15ff6365	200	const u8 da, const u8 sa);
ccf80ddf	201	int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr,
61ad5394 JC	202	struct ieee80211_sub_if_data sdata, char addr4or5,
61ad5394 JC	203	char *addr6);
ccf80ddf	204	int mesh_rmc_check(u8 addr, struct ieee80211s_hdr mesh_hdr,
f698d856 JBG	205	struct ieee80211_sub_if_data *sdata);
	206	bool mesh_matches_local(struct ieee802_11_elems *ie,
	207	struct ieee80211_sub_if_data *sdata);
472dbc45	208	void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
f698d856 JBG	209	void mesh_mgmt_ies_add(struct sk_buff *skb,
f698d856 JBG	210	struct ieee80211_sub_if_data *sdata);
082ebb0c TP	211	int mesh_add_meshconf_ie(struct sk_buff *skb,
	212	struct ieee80211_sub_if_data *sdata);
	213	int mesh_add_meshid_ie(struct sk_buff *skb,
	214	struct ieee80211_sub_if_data *sdata);
	215	int mesh_add_rsn_ie(struct sk_buff *skb,
	216	struct ieee80211_sub_if_data *sdata);
	217	int mesh_add_vendor_ies(struct sk_buff *skb,
	218	struct ieee80211_sub_if_data *sdata);
082ebb0c TP	219	int mesh_add_ds_params_ie(struct sk_buff *skb,
082ebb0c TP	220	struct ieee80211_sub_if_data *sdata);
176f3608 TP	221	int mesh_add_ht_cap_ie(struct sk_buff *skb,
176f3608 TP	222	struct ieee80211_sub_if_data *sdata);
074d46d1	223	int mesh_add_ht_oper_ie(struct sk_buff *skb,
176f3608	224	struct ieee80211_sub_if_data *sdata);
f698d856 JBG	225	void mesh_rmc_free(struct ieee80211_sub_if_data *sdata);
f698d856 JBG	226	int mesh_rmc_init(struct ieee80211_sub_if_data *sdata);
ccf80ddf	227	void ieee80211s_init(void);
bfc32e6a JC	228	void ieee80211s_update_metric(struct ieee80211_local *local,
bfc32e6a JC	229	struct sta_info stainfo, struct sk_buff skb);
ccf80ddf	230	void ieee80211s_stop(void);
902acc78	231	void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata);
472dbc45 JB	232	void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
472dbc45 JB	233	void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata);
63c5723b	234	void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh);
902acc78	235
ccf80ddf	236	/* Mesh paths */
f698d856 JBG	237	int mesh_nexthop_lookup(struct sk_buff *skb,
f698d856 JBG	238	struct ieee80211_sub_if_data *sdata);
0cfda851 TP	239	int mesh_nexthop_resolve(struct sk_buff *skb,
0cfda851 TP	240	struct ieee80211_sub_if_data *sdata);
f698d856 JBG	241	void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata);
	242	struct mesh_path mesh_path_lookup(u8 dst,
	243	struct ieee80211_sub_if_data *sdata);
79617dee Y	244	struct mesh_path mpp_path_lookup(u8 dst,
	245	struct ieee80211_sub_if_data *sdata);
	246	int mpp_path_add(u8 dst, u8 mpp, struct ieee80211_sub_if_data *sdata);
f698d856 JBG	247	struct mesh_path *mesh_path_lookup_by_idx(int idx,
f698d856 JBG	248	struct ieee80211_sub_if_data *sdata);
ccf80ddf	249	void mesh_path_fix_nexthop(struct mesh_path mpath, struct sta_info next_hop);
f698d856	250	void mesh_path_expire(struct ieee80211_sub_if_data *sdata);
f698d856 JBG	251	void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
	252	struct ieee80211_mgmt *mgmt, size_t len);
	253	int mesh_path_add(u8 dst, struct ieee80211_sub_if_data sdata);
5ee68e5b JC	254
	255	int mesh_path_add_gate(struct mesh_path *mpath);
	256	int mesh_path_send_to_gates(struct mesh_path *mpath);
	257	int mesh_gate_num(struct ieee80211_sub_if_data *sdata);
ccf80ddf	258	/* Mesh plinks */
881d948c	259	void mesh_neighbour_update(u8 *hw_addr, u32 rates,
1570ca59 JC	260	struct ieee80211_sub_if_data *sdata,
1570ca59 JC	261	struct ieee802_11_elems *ie);
f698d856	262	bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
d0709a65	263	void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
ccf80ddf LCC	264	void mesh_plink_broken(struct sta_info *sta);
	265	void mesh_plink_deactivate(struct sta_info *sta);
	266	int mesh_plink_open(struct sta_info *sta);
ccf80ddf	267	void mesh_plink_block(struct sta_info *sta);
f698d856 JBG	268	void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
	269	struct ieee80211_mgmt *mgmt, size_t len,
	270	struct ieee80211_rx_status *rx_status);
ccf80ddf LCC	271
	272	/* Private interfaces */
	273	/* Mesh tables */
18889231 JC	274	void mesh_mpath_table_grow(void);
18889231 JC	275	void mesh_mpp_table_grow(void);
ccf80ddf	276	/* Mesh paths */
d19b3bf6	277	int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn, __le16 target_rcode,
15ff6365	278	const u8 ra, struct ieee80211_sub_if_data sdata);
ccf80ddf LCC	279	void mesh_path_assign_nexthop(struct mesh_path mpath, struct sta_info sta);
	280	void mesh_path_flush_pending(struct mesh_path *mpath);
	281	void mesh_path_tx_pending(struct mesh_path *mpath);
	282	int mesh_pathtbl_init(void);
	283	void mesh_pathtbl_unregister(void);
f698d856	284	int mesh_path_del(u8 addr, struct ieee80211_sub_if_data sdata);
ccf80ddf LCC	285	void mesh_path_timer(unsigned long data);
ccf80ddf LCC	286	void mesh_path_flush_by_nexthop(struct sta_info *sta);
ece1a2e7	287	void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
f698d856 JBG	288	void mesh_path_discard_frame(struct sk_buff *skb,
f698d856 JBG	289	struct ieee80211_sub_if_data *sdata);
5bb644a0 JB	290	void mesh_path_quiesce(struct ieee80211_sub_if_data *sdata);
5bb644a0 JB	291	void mesh_path_restart(struct ieee80211_sub_if_data *sdata);
e304bfd3	292	void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata);
ccf80ddf	293
25d49e4d	294	bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt);
f5ea9120 JB	295	extern int mesh_paths_generation;
f5ea9120 JB	296
902acc78 JB	297	#ifdef CONFIG_MAC80211_MESH
	298	extern int mesh_allocated;
	299
ccf80ddf LCC	300	static inline int mesh_plink_free_count(struct ieee80211_sub_if_data *sdata)
ccf80ddf LCC	301	{
472dbc45 JB	302	return sdata->u.mesh.mshcfg.dot11MeshMaxPeerLinks -
472dbc45 JB	303	atomic_read(&sdata->u.mesh.mshstats.estab_plinks);
ccf80ddf LCC	304	}
	305
	306	static inline bool mesh_plink_availables(struct ieee80211_sub_if_data *sdata)
	307	{
d0709a65	308	return (min_t(long, mesh_plink_free_count(sdata),
ccf80ddf LCC	309	MESH_MAX_PLINKS - sdata->local->num_sta)) > 0;
	310	}
	311
	312	static inline void mesh_path_activate(struct mesh_path *mpath)
	313	{
	314	mpath->flags \|= MESH_PATH_ACTIVE \| MESH_PATH_RESOLVED;
	315	}
	316
c7108a71 JC	317	static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
	318	{
	319	return sdata->u.mesh.mesh_pp_id == IEEE80211_PATH_PROTOCOL_HWMP;
	320	}
	321
472dbc45 JB	322	void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local);
472dbc45 JB	323
5bb644a0 JB	324	void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata);
	325	void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata);
	326	void mesh_plink_quiesce(struct sta_info *sta);
	327	void mesh_plink_restart(struct sta_info *sta);
902acc78 JB	328	#else
902acc78 JB	329	#define mesh_allocated 0
472dbc45 JB	330	static inline void
472dbc45 JB	331	ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) {}
5bb644a0 JB	332	static inline void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata)
	333	{}
	334	static inline void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata)
	335	{}
	336	static inline void mesh_plink_quiesce(struct sta_info *sta) {}
	337	static inline void mesh_plink_restart(struct sta_info *sta) {}
c7108a71 JC	338	static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
c7108a71 JC	339	{ return false; }
902acc78 JB	340	#endif
902acc78 JB	341
ccf80ddf	342	#endif /* IEEE80211S_H */