[mirror_ubuntu-hirsute-kernel.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 <asm/unaligned.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_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),
};

/**
 * 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
 *
 *
 * 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;
};

/**
 * 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
 * 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 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 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

/* Pending ANA approval */
#define MESH_PATH_SEL_ACTION	0

/* PERR reason codes */
#define PEER_RCODE_UNSPECIFIED  11
#define PERR_RCODE_NO_ROUTE     12
#define PERR_RCODE_DEST_UNREACH 13

/* 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_srates_ie(struct sk_buff *skb,
		       struct ieee80211_sub_if_data *sdata);
int mesh_add_ext_srates_ie(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);
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);
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_path_flush(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);
/* 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_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);

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>
f375d558	16	#include <asm/unaligned.h>
902acc78	17	#include "ieee80211_i.h"
ccf80ddf	18
ccf80ddf LCC	19
	20	/* Data structures */
	21
	22	/**
	23	* enum mesh_path_flags - mac80211 mesh path flags
	24	*
	25	*
	26	*
eb80ed8d RR	27	* @MESH_PATH_ACTIVE: the mesh path can be used for forwarding
eb80ed8d RR	28	* @MESH_PATH_RESOLVING: the discovery process is running for this mesh path
d19b3bf6	29	* @MESH_PATH_SN_VALID: the mesh path contains a valid destination sequence
ccf80ddf LCC	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
ccf80ddf	34	*
eb80ed8d	35	* MESH_PATH_RESOLVED is used by the mesh path timer to
ccf80ddf LCC	36	* decide when to stop or cancel the mesh path discovery.
	37	*/
	38	enum mesh_path_flags {
	39	MESH_PATH_ACTIVE = BIT(0),
	40	MESH_PATH_RESOLVING = BIT(1),
d19b3bf6	41	MESH_PATH_SN_VALID = BIT(2),
ccf80ddf LCC	42	MESH_PATH_FIXED = BIT(3),
ccf80ddf LCC	43	MESH_PATH_RESOLVED = BIT(4),
ccf80ddf LCC	44	};
ccf80ddf LCC	45
18889231 JC	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
e304bfd3	56	* @MESH_WORK_ROOT: the mesh root station needs to send a frame
18889231 JC	57	*/
	58	enum mesh_deferred_task_flags {
	59	MESH_WORK_HOUSEKEEPING,
	60	MESH_WORK_GROW_MPATH_TABLE,
	61	MESH_WORK_GROW_MPP_TABLE,
e304bfd3	62	MESH_WORK_ROOT,
18889231 JC	63	};
18889231 JC	64
ccf80ddf LCC	65	/**
	66	* struct mesh_path - mac80211 mesh path structure
	67	*
	68	* @dst: mesh path destination mac address
f698d856	69	* @sdata: mesh subif
ccf80ddf LCC	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
d19b3bf6	75	* @sn: target sequence number
ccf80ddf LCC	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
fe583434	83	* @state_lock: mesh path state lock
ccf80ddf LCC	84	*
ccf80ddf LCC	85	*
f698d856	86	* The combination of dst and sdata is unique in the mesh path table. Since the
d0709a65 JB	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.
ccf80ddf LCC	90	*/
	91	struct mesh_path {
	92	u8 dst[ETH_ALEN];
79617dee	93	u8 mpp[ETH_ALEN]; /* used for MPP or MAP */
f698d856	94	struct ieee80211_sub_if_data *sdata;
40b275b6	95	struct sta_info __rcu *next_hop;
ccf80ddf LCC	96	struct timer_list timer;
	97	struct sk_buff_head frame_queue;
	98	struct rcu_head rcu;
d19b3bf6	99	u32 sn;
ccf80ddf LCC	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
eef35c2d	118	* @copy_node: function to copy nodes of the table
ccf80ddf LCC	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
1928ecab	123	* rcu_head: RCU head to free the table
ccf80ddf LCC	124	*/
	125	struct 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);
4caf86c6	133	int (copy_node) (struct hlist_node p, struct mesh_table *newtbl);
ccf80ddf LCC	134	int size_order;
ccf80ddf LCC	135	int mean_chain_len;
1928ecab JB	136
1928ecab JB	137	struct rcu_head rcu_head;
ccf80ddf LCC	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	*/
	157	struct rmc_entry {
	158	struct list_head list;
	159	u32 seqnum;
	160	unsigned long exp_time;
	161	u8 sa[ETH_ALEN];
	162	};
	163
	164	struct mesh_rmc {
	165	struct rmc_entry bucket[RMC_BUCKETS];
51ceddad	166	u32 idx_mask;
ccf80ddf LCC	167	};
	168
	169
5b365834	170	#define MESH_DEFAULT_BEACON_INTERVAL 1000 /* in 1024 us units */
ccf80ddf	171
ccf80ddf LCC	172	#define MESH_PATH_EXPIRE (600 * HZ)
ccf80ddf LCC	173
ccf80ddf LCC	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 */
095de013	181	#define MESH_PATH_SEL_ACTION 0
ccf80ddf	182
d611f062 RP	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
ccf80ddf LCC	188	/* Public interfaces */
ccf80ddf LCC	189	/* Various */
3c5772a5	190	int ieee80211_fill_mesh_addresses(struct ieee80211_hdr hdr, __le16 fc,
15ff6365	191	const u8 da, const u8 sa);
ccf80ddf	192	int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr,
61ad5394 JC	193	struct ieee80211_sub_if_data sdata, char addr4or5,
61ad5394 JC	194	char *addr6);
ccf80ddf	195	int mesh_rmc_check(u8 addr, struct ieee80211s_hdr mesh_hdr,
f698d856 JBG	196	struct ieee80211_sub_if_data *sdata);
	197	bool mesh_matches_local(struct ieee802_11_elems *ie,
	198	struct ieee80211_sub_if_data *sdata);
472dbc45	199	void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
f698d856 JBG	200	void mesh_mgmt_ies_add(struct sk_buff *skb,
f698d856 JBG	201	struct ieee80211_sub_if_data *sdata);
082ebb0c TP	202	int mesh_add_meshconf_ie(struct sk_buff *skb,
	203	struct ieee80211_sub_if_data *sdata);
	204	int mesh_add_meshid_ie(struct sk_buff *skb,
	205	struct ieee80211_sub_if_data *sdata);
	206	int mesh_add_rsn_ie(struct sk_buff *skb,
	207	struct ieee80211_sub_if_data *sdata);
	208	int mesh_add_vendor_ies(struct sk_buff *skb,
	209	struct ieee80211_sub_if_data *sdata);
	210	int mesh_add_srates_ie(struct sk_buff *skb,
	211	struct ieee80211_sub_if_data *sdata);
	212	int mesh_add_ext_srates_ie(struct sk_buff *skb,
	213	struct ieee80211_sub_if_data *sdata);
	214	int mesh_add_ds_params_ie(struct sk_buff *skb,
	215	struct ieee80211_sub_if_data *sdata);
f698d856 JBG	216	void mesh_rmc_free(struct ieee80211_sub_if_data *sdata);
f698d856 JBG	217	int mesh_rmc_init(struct ieee80211_sub_if_data *sdata);
ccf80ddf	218	void ieee80211s_init(void);
bfc32e6a JC	219	void ieee80211s_update_metric(struct ieee80211_local *local,
bfc32e6a JC	220	struct sta_info stainfo, struct sk_buff skb);
ccf80ddf	221	void ieee80211s_stop(void);
902acc78	222	void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata);
472dbc45 JB	223	void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
472dbc45 JB	224	void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata);
63c5723b	225	void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh);
902acc78	226
ccf80ddf	227	/* Mesh paths */
f698d856 JBG	228	int mesh_nexthop_lookup(struct sk_buff *skb,
	229	struct ieee80211_sub_if_data *sdata);
	230	void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata);
	231	struct mesh_path mesh_path_lookup(u8 dst,
	232	struct ieee80211_sub_if_data *sdata);
79617dee Y	233	struct mesh_path mpp_path_lookup(u8 dst,
	234	struct ieee80211_sub_if_data *sdata);
	235	int mpp_path_add(u8 dst, u8 mpp, struct ieee80211_sub_if_data *sdata);
f698d856 JBG	236	struct mesh_path *mesh_path_lookup_by_idx(int idx,
f698d856 JBG	237	struct ieee80211_sub_if_data *sdata);
ccf80ddf	238	void mesh_path_fix_nexthop(struct mesh_path mpath, struct sta_info next_hop);
f698d856 JBG	239	void mesh_path_expire(struct ieee80211_sub_if_data *sdata);
	240	void mesh_path_flush(struct ieee80211_sub_if_data *sdata);
	241	void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
	242	struct ieee80211_mgmt *mgmt, size_t len);
	243	int mesh_path_add(u8 dst, struct ieee80211_sub_if_data sdata);
ccf80ddf	244	/* Mesh plinks */
881d948c	245	void mesh_neighbour_update(u8 *hw_addr, u32 rates,
1570ca59 JC	246	struct ieee80211_sub_if_data *sdata,
1570ca59 JC	247	struct ieee802_11_elems *ie);
f698d856	248	bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
d0709a65	249	void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
ccf80ddf LCC	250	void mesh_plink_broken(struct sta_info *sta);
	251	void mesh_plink_deactivate(struct sta_info *sta);
	252	int mesh_plink_open(struct sta_info *sta);
ccf80ddf	253	void mesh_plink_block(struct sta_info *sta);
f698d856 JBG	254	void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
	255	struct ieee80211_mgmt *mgmt, size_t len,
	256	struct ieee80211_rx_status *rx_status);
ccf80ddf LCC	257
	258	/* Private interfaces */
	259	/* Mesh tables */
18889231 JC	260	void mesh_mpath_table_grow(void);
18889231 JC	261	void mesh_mpp_table_grow(void);
ccf80ddf	262	/* Mesh paths */
d19b3bf6	263	int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn, __le16 target_rcode,
15ff6365	264	const u8 ra, struct ieee80211_sub_if_data sdata);
ccf80ddf LCC	265	void mesh_path_assign_nexthop(struct mesh_path mpath, struct sta_info sta);
	266	void mesh_path_flush_pending(struct mesh_path *mpath);
	267	void mesh_path_tx_pending(struct mesh_path *mpath);
	268	int mesh_pathtbl_init(void);
	269	void mesh_pathtbl_unregister(void);
f698d856	270	int mesh_path_del(u8 addr, struct ieee80211_sub_if_data sdata);
ccf80ddf LCC	271	void mesh_path_timer(unsigned long data);
ccf80ddf LCC	272	void mesh_path_flush_by_nexthop(struct sta_info *sta);
f698d856 JBG	273	void mesh_path_discard_frame(struct sk_buff *skb,
f698d856 JBG	274	struct ieee80211_sub_if_data *sdata);
5bb644a0 JB	275	void mesh_path_quiesce(struct ieee80211_sub_if_data *sdata);
5bb644a0 JB	276	void mesh_path_restart(struct ieee80211_sub_if_data *sdata);
e304bfd3	277	void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata);
ccf80ddf	278
f5ea9120 JB	279	extern int mesh_paths_generation;
f5ea9120 JB	280
902acc78 JB	281	#ifdef CONFIG_MAC80211_MESH
	282	extern int mesh_allocated;
	283
ccf80ddf LCC	284	static inline int mesh_plink_free_count(struct ieee80211_sub_if_data *sdata)
ccf80ddf LCC	285	{
472dbc45 JB	286	return sdata->u.mesh.mshcfg.dot11MeshMaxPeerLinks -
472dbc45 JB	287	atomic_read(&sdata->u.mesh.mshstats.estab_plinks);
ccf80ddf LCC	288	}
	289
	290	static inline bool mesh_plink_availables(struct ieee80211_sub_if_data *sdata)
	291	{
d0709a65	292	return (min_t(long, mesh_plink_free_count(sdata),
ccf80ddf LCC	293	MESH_MAX_PLINKS - sdata->local->num_sta)) > 0;
	294	}
	295
	296	static inline void mesh_path_activate(struct mesh_path *mpath)
	297	{
	298	mpath->flags \|= MESH_PATH_ACTIVE \| MESH_PATH_RESOLVED;
	299	}
	300
c7108a71 JC	301	static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
	302	{
	303	return sdata->u.mesh.mesh_pp_id == IEEE80211_PATH_PROTOCOL_HWMP;
	304	}
	305
472dbc45 JB	306	void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local);
472dbc45 JB	307
5bb644a0 JB	308	void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata);
	309	void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata);
	310	void mesh_plink_quiesce(struct sta_info *sta);
	311	void mesh_plink_restart(struct sta_info *sta);
902acc78 JB	312	#else
902acc78 JB	313	#define mesh_allocated 0
472dbc45 JB	314	static inline void
472dbc45 JB	315	ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) {}
5bb644a0 JB	316	static inline void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata)
	317	{}
	318	static inline void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata)
	319	{}
	320	static inline void mesh_plink_quiesce(struct sta_info *sta) {}
	321	static inline void mesh_plink_restart(struct sta_info *sta) {}
c7108a71 JC	322	static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
c7108a71 JC	323	{ return false; }
902acc78 JB	324	#endif
902acc78 JB	325
ccf80ddf	326	#endif /* IEEE80211S_H */