[mirror_ubuntu-zesty-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 "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_DELETED: the mesh path has been deleted and should no longer
 *	be used
 *
 * 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),
	MESH_PATH_DELETED =	BIT(6),
};

/**
 * enum mesh_deferred_task_flags - mac80211 mesh deferred tasks
 *
 *
 *
 * @MESH_WORK_HOUSEKEEPING: run the periodic mesh housekeeping tasks
 * @MESH_WORK_ROOT: the mesh root station needs to send a frame
 * @MESH_WORK_DRIFT_ADJUST: time to compensate for clock drift relative to other
 * mesh nodes
 * @MESH_WORK_MBSS_CHANGED: rebuild beacon and notify driver of BSS changes
 */
enum mesh_deferred_task_flags {
	MESH_WORK_HOUSEKEEPING,
	MESH_WORK_ROOT,
	MESH_WORK_DRIFT_ADJUST,
	MESH_WORK_MBSS_CHANGED,
};

/**
 * struct mesh_path - mac80211 mesh path structure
 *
 * @dst: mesh path destination mac address
 * @mpp: mesh proxy mac address
 * @rhash: rhashtable list pointer
 * @gate_list: list pointer for known gates list
 * @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
 * @rcu: rcu head for freeing mesh path
 * @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
 * @rann_metric: the aggregated path metric towards the root node
 * @last_preq_to_root: Timestamp of last PREQ sent to root
 * @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 dst address is unique in the mesh path table. Since the mesh_path is
 * protected by RCU, deleting the next_hop STA must 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 rhash_head rhash;
	struct hlist_node gate_list;
	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];
	u32 rann_metric;
	unsigned long last_preq_to_root;
	bool is_root;
	bool is_gate;
};

/**
 * struct mesh_table
 *
 * @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.
 * @gates_lock: protects updates to known_gates
 * @rhead: the rhashtable containing struct mesh_paths, keyed by dest addr
 * @entries: number of entries in the table
 */
struct mesh_table {
	struct hlist_head known_gates;
	spinlock_t gates_lock;
	struct rhashtable rhead;
	atomic_t entries;		/* Up to MAX_MESH_NEIGHBOURS */
};

/* 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
 * @list: hashtable list pointer
 *
 * 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 hlist_node list;
	unsigned long exp_time;
	u32 seqnum;
	u8 sa[ETH_ALEN];
};

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

#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)

#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

/* Number of frames buffered per destination for unresolved destinations */
#define MESH_FRAME_QUEUE_LEN	10

/* Public interfaces */
/* Various */
int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
				  const u8 *da, const u8 *sa);
unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
				       struct ieee80211s_hdr *meshhdr,
				       const char *addr4or5, const char *addr6);
int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
		   const u8 *addr, struct ieee80211s_hdr *mesh_hdr);
bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
			struct ieee802_11_elems *ie);
void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
			 struct sk_buff *skb);
int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata,
		       struct sk_buff *skb);
int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata,
		    struct sk_buff *skb);
int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
			struct sk_buff *skb);
int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
		       struct sk_buff *skb);
int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
			struct sk_buff *skb);
int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata,
			struct sk_buff *skb);
int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,
			 struct sk_buff *skb);
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 *sta, struct sk_buff *skb);
void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata);
void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata);
int 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);
const struct ieee80211_mesh_sync_ops *ieee80211_mesh_sync_ops_get(u8 method);
/* wrapper for ieee80211_bss_info_change_notify() */
void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
				       u32 changed);

/* mesh power save */
u32 ieee80211_mps_local_status_update(struct ieee80211_sub_if_data *sdata);
u32 ieee80211_mps_set_sta_local_pm(struct sta_info *sta,
				   enum nl80211_mesh_power_mode pm);
void ieee80211_mps_set_frame_flags(struct ieee80211_sub_if_data *sdata,
				   struct sta_info *sta,
				   struct ieee80211_hdr *hdr);
void ieee80211_mps_sta_status_update(struct sta_info *sta);
void ieee80211_mps_rx_h_sta_process(struct sta_info *sta,
				    struct ieee80211_hdr *hdr);
void ieee80211_mpsp_trigger_process(u8 *qc, struct sta_info *sta,
				    bool tx, bool acked);
void ieee80211_mps_frame_release(struct sta_info *sta,
				 struct ieee802_11_elems *elems);

/* Mesh paths */
int mesh_nexthop_lookup(struct ieee80211_sub_if_data *sdata,
			struct sk_buff *skb);
int mesh_nexthop_resolve(struct ieee80211_sub_if_data *sdata,
			 struct sk_buff *skb);
void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata);
struct mesh_path *mesh_path_lookup(struct ieee80211_sub_if_data *sdata,
				   const u8 *dst);
struct mesh_path *mpp_path_lookup(struct ieee80211_sub_if_data *sdata,
				  const u8 *dst);
int mpp_path_add(struct ieee80211_sub_if_data *sdata,
		 const u8 *dst, const u8 *mpp);
struct mesh_path *
mesh_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx);
struct mesh_path *
mpp_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx);
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);
struct mesh_path *
mesh_path_add(struct ieee80211_sub_if_data *sdata, const u8 *dst);

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(struct ieee80211_sub_if_data *sdata,
			   u8 *hw_addr, struct ieee802_11_elems *ie);
bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
void mesh_plink_broken(struct sta_info *sta);
u32 mesh_plink_deactivate(struct sta_info *sta);
u32 mesh_plink_open(struct sta_info *sta);
u32 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);
void mesh_sta_cleanup(struct sta_info *sta);

/* Private interfaces */
/* Mesh paths */
int mesh_path_error_tx(struct ieee80211_sub_if_data *sdata,
		       u8 ttl, const u8 *target, u32 target_sn,
		       u16 target_rcode, const u8 *ra);
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(struct ieee80211_sub_if_data *sdata);
void mesh_pathtbl_unregister(struct ieee80211_sub_if_data *sdata);
int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr);
void mesh_path_timer(unsigned long data);
void mesh_path_flush_by_nexthop(struct sta_info *sta);
void mesh_path_discard_frame(struct ieee80211_sub_if_data *sdata,
			     struct sk_buff *skb);
void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata);

bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt);

#ifdef CONFIG_MAC80211_MESH
static inline
u32 mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata)
{
	atomic_inc(&sdata->u.mesh.estab_plinks);
	return mesh_accept_plinks_update(sdata) | BSS_CHANGED_BEACON;
}

static inline
u32 mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata)
{
	atomic_dec(&sdata->u.mesh.estab_plinks);
	return mesh_accept_plinks_update(sdata) | BSS_CHANGED_BEACON;
}

static inline int mesh_plink_free_count(struct ieee80211_sub_if_data *sdata)
{
	return sdata->u.mesh.mshcfg.dot11MeshMaxPeerLinks -
	       atomic_read(&sdata->u.mesh.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 mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata);
void ieee80211s_stop(void);
#else
static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
{ return false; }
static inline void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
{}
static inline void ieee80211s_stop(void) {}
#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	*
eb80ed8d RR	24	* @MESH_PATH_ACTIVE: the mesh path can be used for forwarding
eb80ed8d RR	25	* @MESH_PATH_RESOLVING: the discovery process is running for this mesh path
d19b3bf6	26	* @MESH_PATH_SN_VALID: the mesh path contains a valid destination sequence
bf7cd94d	27	* number
ccf80ddf	28	* @MESH_PATH_FIXED: the mesh path has been manually set and should not be
bf7cd94d	29	* modified
ccf80ddf	30	* @MESH_PATH_RESOLVED: the mesh path can has been resolved
f3011cf9	31	* @MESH_PATH_REQ_QUEUED: there is an unsent path request for this destination
bf7cd94d	32	* already queued up, waiting for the discovery process to start.
74932959 BC	33	* @MESH_PATH_DELETED: the mesh path has been deleted and should no longer
74932959 BC	34	* be used
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),
74932959	46	MESH_PATH_DELETED = BIT(6),
ccf80ddf LCC	47	};
ccf80ddf LCC	48
18889231 JC	49	/**
	50	* enum mesh_deferred_task_flags - mac80211 mesh deferred tasks
	51	*
	52	*
	53	*
	54	* @MESH_WORK_HOUSEKEEPING: run the periodic mesh housekeeping tasks
e304bfd3	55	* @MESH_WORK_ROOT: the mesh root station needs to send a frame
dbf498fb JC	56	* @MESH_WORK_DRIFT_ADJUST: time to compensate for clock drift relative to other
dbf498fb JC	57	* mesh nodes
f81a9ded	58	* @MESH_WORK_MBSS_CHANGED: rebuild beacon and notify driver of BSS changes
18889231 JC	59	*/
	60	enum mesh_deferred_task_flags {
	61	MESH_WORK_HOUSEKEEPING,
e304bfd3	62	MESH_WORK_ROOT,
dbf498fb	63	MESH_WORK_DRIFT_ADJUST,
f81a9ded	64	MESH_WORK_MBSS_CHANGED,
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
68bb54b4 BC	71	* @mpp: mesh proxy mac address
	72	* @rhash: rhashtable list pointer
	73	* @gate_list: list pointer for known gates list
f698d856	74	* @sdata: mesh subif
ccf80ddf	75	* @next_hop: mesh neighbor to which frames for this destination will be
bf7cd94d	76	* forwarded
ccf80ddf LCC	77	* @timer: mesh path discovery timer
ccf80ddf LCC	78	* @frame_queue: pending queue for frames sent to this destination while the
bf7cd94d	79	* path is unresolved
68bb54b4	80	* @rcu: rcu head for freeing mesh path
d19b3bf6	81	* @sn: target sequence number
ccf80ddf LCC	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
bf7cd94d	86	* retry
ccf80ddf LCC	87	* @discovery_retries: number of discovery retries
ccf80ddf LCC	88	* @flags: mesh path flags, as specified on &enum mesh_path_flags
f5e50cd0 JC	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.
3d045a54	92	* @rann_snd_addr: the RANN sender address
d2a079fd	93	* @rann_metric: the aggregated path metric towards the root node
728b19e5	94	* @last_preq_to_root: Timestamp of last PREQ sent to root
3d045a54	95	* @is_root: the destination station of this path is a root node
5ee68e5b	96	* @is_gate: the destination station of this path is a mesh gate
ccf80ddf LCC	97	*
ccf80ddf LCC	98	*
68bb54b4 BC	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.
ccf80ddf LCC	103	*/
	104	struct mesh_path {
	105	u8 dst[ETH_ALEN];
79617dee	106	u8 mpp[ETH_ALEN]; /* used for MPP or MAP */
60854fd9	107	struct rhash_head rhash;
947c2a0e	108	struct hlist_node gate_list;
f698d856	109	struct ieee80211_sub_if_data *sdata;
40b275b6	110	struct sta_info __rcu *next_hop;
ccf80ddf LCC	111	struct timer_list timer;
	112	struct sk_buff_head frame_queue;
	113	struct rcu_head rcu;
d19b3bf6	114	u32 sn;
ccf80ddf LCC	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;
3d045a54	122	u8 rann_snd_addr[ETH_ALEN];
d2a079fd	123	u32 rann_metric;
728b19e5	124	unsigned long last_preq_to_root;
3d045a54	125	bool is_root;
5ee68e5b	126	bool is_gate;
ccf80ddf LCC	127	};
	128
	129	/**
	130	* struct mesh_table
	131	*
5ee68e5b JC	132	* @known_gates: list of known mesh gates and their mpaths by the station. The
5ee68e5b JC	133	* gate's mpath may or may not be resolved and active.
68bb54b4 BC	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
ccf80ddf LCC	137	*/
ccf80ddf LCC	138	struct mesh_table {
18b27ff7	139	struct hlist_head known_gates;
5ee68e5b	140	spinlock_t gates_lock;
60854fd9	141	struct rhashtable rhead;
3257523b	142	atomic_t entries; /* Up to MAX_MESH_NEIGHBOURS */
ccf80ddf LCC	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
68bb54b4	157	* @list: hashtable list pointer
ccf80ddf LCC	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	*/
	163	struct rmc_entry {
47a0489c	164	struct hlist_node list;
ccf80ddf	165	unsigned long exp_time;
3257523b	166	u32 seqnum;
ccf80ddf LCC	167	u8 sa[ETH_ALEN];
	168	};
	169
	170	struct mesh_rmc {
47a0489c	171	struct hlist_head bucket[RMC_BUCKETS];
51ceddad	172	u32 idx_mask;
ccf80ddf LCC	173	};
ccf80ddf LCC	174
25d49e4d	175	#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
ccf80ddf	176
ccf80ddf LCC	177	#define MESH_PATH_EXPIRE (600 * HZ)
ccf80ddf LCC	178
ccf80ddf LCC	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
4bd4c2dd TP	185	/* Number of frames buffered per destination for unresolved destinations */
	186	#define MESH_FRAME_QUEUE_LEN 10
	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);
5edfcee5 AH	192	unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
	193	struct ieee80211s_hdr *meshhdr,
	194	const char addr4or5, const char addr6);
bf7cd94d JB	195	int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
bf7cd94d JB	196	const u8 addr, struct ieee80211s_hdr mesh_hdr);
f743ff49 TP	197	bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
f743ff49 TP	198	struct ieee802_11_elems *ie);
472dbc45	199	void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
bf7cd94d JB	200	int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
	201	struct sk_buff *skb);
	202	int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata,
	203	struct sk_buff *skb);
	204	int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata,
	205	struct sk_buff *skb);
	206	int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
	207	struct sk_buff *skb);
	208	int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
	209	struct sk_buff *skb);
	210	int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
	211	struct sk_buff *skb);
c85fb53c BC	212	int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata,
	213	struct sk_buff *skb);
	214	int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,
	215	struct sk_buff *skb);
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	219	void ieee80211s_update_metric(struct ieee80211_local *local,
bf7cd94d	220	struct sta_info sta, struct sk_buff skb);
902acc78	221	void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata);
0371a08f	222	void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata);
2b5e1967	223	int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
472dbc45	224	void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata);
63c5723b	225	void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh);
8ba7acf3	226	const struct ieee80211_mesh_sync_ops *ieee80211_mesh_sync_ops_get(u8 method);
2b5e1967 TP	227	/* wrapper for ieee80211_bss_info_change_notify() */
	228	void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
	229	u32 changed);
902acc78	230
3f52b7e3	231	/* mesh power save */
39886b61 TP	232	u32 ieee80211_mps_local_status_update(struct ieee80211_sub_if_data *sdata);
	233	u32 ieee80211_mps_set_sta_local_pm(struct sta_info *sta,
	234	enum nl80211_mesh_power_mode pm);
3f52b7e3 MP	235	void ieee80211_mps_set_frame_flags(struct ieee80211_sub_if_data *sdata,
	236	struct sta_info *sta,
	237	struct ieee80211_hdr *hdr);
	238	void ieee80211_mps_sta_status_update(struct sta_info *sta);
	239	void ieee80211_mps_rx_h_sta_process(struct sta_info *sta,
	240	struct ieee80211_hdr *hdr);
	241	void ieee80211_mpsp_trigger_process(u8 qc, struct sta_info sta,
	242	bool tx, bool acked);
	243	void ieee80211_mps_frame_release(struct sta_info *sta,
	244	struct ieee802_11_elems *elems);
	245
ccf80ddf	246	/* Mesh paths */
bf7cd94d JB	247	int mesh_nexthop_lookup(struct ieee80211_sub_if_data *sdata,
	248	struct sk_buff *skb);
	249	int mesh_nexthop_resolve(struct ieee80211_sub_if_data *sdata,
	250	struct sk_buff *skb);
f698d856	251	void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata);
bf7cd94d JB	252	struct mesh_path mesh_path_lookup(struct ieee80211_sub_if_data sdata,
	253	const u8 *dst);
	254	struct mesh_path mpp_path_lookup(struct ieee80211_sub_if_data sdata,
	255	const u8 *dst);
	256	int mpp_path_add(struct ieee80211_sub_if_data *sdata,
	257	const u8 dst, const u8 mpp);
	258	struct mesh_path *
	259	mesh_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx);
a2db2ed3 HR	260	struct mesh_path *
a2db2ed3 HR	261	mpp_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx);
ccf80ddf	262	void mesh_path_fix_nexthop(struct mesh_path mpath, struct sta_info next_hop);
f698d856	263	void mesh_path_expire(struct ieee80211_sub_if_data *sdata);
f698d856	264	void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
bf7cd94d	265	struct ieee80211_mgmt *mgmt, size_t len);
ae76eef0 BC	266	struct mesh_path *
ae76eef0 BC	267	mesh_path_add(struct ieee80211_sub_if_data sdata, const u8 dst);
5ee68e5b JC	268
	269	int mesh_path_add_gate(struct mesh_path *mpath);
	270	int mesh_path_send_to_gates(struct mesh_path *mpath);
	271	int mesh_gate_num(struct ieee80211_sub_if_data *sdata);
bf7cd94d	272
ccf80ddf	273	/* Mesh plinks */
f743ff49	274	void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
bf7cd94d	275	u8 hw_addr, struct ieee802_11_elems ie);
f698d856	276	bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
df323818	277	u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
ccf80ddf	278	void mesh_plink_broken(struct sta_info *sta);
45b5028e	279	u32 mesh_plink_deactivate(struct sta_info *sta);
39886b61 TP	280	u32 mesh_plink_open(struct sta_info *sta);
39886b61 TP	281	u32 mesh_plink_block(struct sta_info *sta);
f698d856 JBG	282	void 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);
45b5028e	285	void mesh_sta_cleanup(struct sta_info *sta);
ccf80ddf LCC	286
ccf80ddf LCC	287	/* Private interfaces */
ccf80ddf	288	/* Mesh paths */
bf7cd94d	289	int mesh_path_error_tx(struct ieee80211_sub_if_data *sdata,
f63f8421 CYY	290	u8 ttl, const u8 *target, u32 target_sn,
f63f8421 CYY	291	u16 target_rcode, const u8 *ra);
ccf80ddf LCC	292	void mesh_path_assign_nexthop(struct mesh_path mpath, struct sta_info sta);
	293	void mesh_path_flush_pending(struct mesh_path *mpath);
	294	void mesh_path_tx_pending(struct mesh_path *mpath);
2bdaf386 BC	295	int mesh_pathtbl_init(struct ieee80211_sub_if_data *sdata);
2bdaf386 BC	296	void mesh_pathtbl_unregister(struct ieee80211_sub_if_data *sdata);
bf7cd94d	297	int mesh_path_del(struct ieee80211_sub_if_data sdata, const u8 addr);
ccf80ddf LCC	298	void mesh_path_timer(unsigned long data);
ccf80ddf LCC	299	void mesh_path_flush_by_nexthop(struct sta_info *sta);
bf7cd94d JB	300	void mesh_path_discard_frame(struct ieee80211_sub_if_data *sdata,
bf7cd94d JB	301	struct sk_buff *skb);
e304bfd3	302	void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata);
ccf80ddf	303
25d49e4d	304	bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt);
f5ea9120	305
902acc78	306	#ifdef CONFIG_MAC80211_MESH
1617bab8 MP	307	static inline
	308	u32 mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata)
	309	{
	310	atomic_inc(&sdata->u.mesh.estab_plinks);
e05ecccd	311	return mesh_accept_plinks_update(sdata) \| BSS_CHANGED_BEACON;
1617bab8 MP	312	}
	313
	314	static inline
	315	u32 mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata)
	316	{
	317	atomic_dec(&sdata->u.mesh.estab_plinks);
e05ecccd	318	return mesh_accept_plinks_update(sdata) \| BSS_CHANGED_BEACON;
1617bab8 MP	319	}
1617bab8 MP	320
ccf80ddf LCC	321	static inline int mesh_plink_free_count(struct ieee80211_sub_if_data *sdata)
ccf80ddf LCC	322	{
472dbc45	323	return sdata->u.mesh.mshcfg.dot11MeshMaxPeerLinks -
1258d976	324	atomic_read(&sdata->u.mesh.estab_plinks);
ccf80ddf LCC	325	}
	326
	327	static inline bool mesh_plink_availables(struct ieee80211_sub_if_data *sdata)
	328	{
d0709a65	329	return (min_t(long, mesh_plink_free_count(sdata),
ccf80ddf LCC	330	MESH_MAX_PLINKS - sdata->local->num_sta)) > 0;
	331	}
	332
	333	static inline void mesh_path_activate(struct mesh_path *mpath)
	334	{
	335	mpath->flags \|= MESH_PATH_ACTIVE \| MESH_PATH_RESOLVED;
	336	}
	337
c7108a71 JC	338	static 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
94c514fe	343	void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
dbf498fb	344	void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata);
bf7cd94d	345	void ieee80211s_stop(void);
902acc78	346	#else
c7108a71 JC	347	static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
c7108a71 JC	348	{ return false; }
94c514fe AE	349	static inline void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
94c514fe AE	350	{}
bf7cd94d	351	static inline void ieee80211s_stop(void) {}
902acc78 JB	352	#endif
902acc78 JB	353
ccf80ddf	354	#endif /* IEEE80211S_H */