400 lines
14 KiB
C
400 lines
14 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (c) 2008, 2009 open80211s Ltd.
|
|
* Copyright (C) 2023 Intel Corporation
|
|
* Authors: Luis Carlos Cobo <luisca@cozybit.com>
|
|
* Javier Cardona <javier@cozybit.com>
|
|
*/
|
|
|
|
#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
|
|
* @walk_list: linked list containing all mesh_path objects.
|
|
* @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
|
|
* @path_change_count: the number of path changes to destination
|
|
*
|
|
*
|
|
* 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 walk_list;
|
|
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;
|
|
unsigned long fast_tx_check;
|
|
bool is_root;
|
|
bool is_gate;
|
|
u32 path_change_count;
|
|
};
|
|
|
|
#define MESH_FAST_TX_CACHE_MAX_SIZE 512
|
|
#define MESH_FAST_TX_CACHE_THRESHOLD_SIZE 384
|
|
#define MESH_FAST_TX_CACHE_TIMEOUT 8000 /* msecs */
|
|
|
|
/**
|
|
* struct ieee80211_mesh_fast_tx - cached mesh fast tx entry
|
|
* @rhash: rhashtable pointer
|
|
* @addr_key: The Ethernet DA which is the key for this entry
|
|
* @fast_tx: base fast_tx data
|
|
* @hdr: cached mesh and rfc1042 headers
|
|
* @hdrlen: length of mesh + rfc1042
|
|
* @walk_list: list containing all the fast tx entries
|
|
* @mpath: mesh path corresponding to the Mesh DA
|
|
* @mppath: MPP entry corresponding to this DA
|
|
* @timestamp: Last used time of this entry
|
|
*/
|
|
struct ieee80211_mesh_fast_tx {
|
|
struct rhash_head rhash;
|
|
u8 addr_key[ETH_ALEN] __aligned(2);
|
|
|
|
struct ieee80211_fast_tx fast_tx;
|
|
u8 hdr[sizeof(struct ieee80211s_hdr) + sizeof(rfc1042_header)];
|
|
u16 hdrlen;
|
|
|
|
struct mesh_path *mpath, *mppath;
|
|
struct hlist_node walk_list;
|
|
unsigned long timestamp;
|
|
};
|
|
|
|
/* 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);
|
|
int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb, u8 ie_len);
|
|
int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb);
|
|
int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb);
|
|
int mesh_add_eht_cap_ie(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb, u8 ie_len);
|
|
int mesh_add_eht_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 ieee80211_tx_status *st);
|
|
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,
|
|
u64 changed);
|
|
|
|
/* mesh power save */
|
|
u64 ieee80211_mps_local_status_update(struct ieee80211_sub_if_data *sdata);
|
|
u64 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);
|
|
u32 airtime_link_metric_get(struct ieee80211_local *local,
|
|
struct sta_info *sta);
|
|
|
|
/* Mesh plinks */
|
|
void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
|
|
u8 *hw_addr, struct ieee802_11_elems *ie,
|
|
struct ieee80211_rx_status *rx_status);
|
|
bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
|
|
u64 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
|
|
void mesh_plink_timer(struct timer_list *t);
|
|
void mesh_plink_broken(struct sta_info *sta);
|
|
u64 mesh_plink_deactivate(struct sta_info *sta);
|
|
u64 mesh_plink_open(struct sta_info *sta);
|
|
u64 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);
|
|
void 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(struct timer_list *t);
|
|
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);
|
|
struct ieee80211_mesh_fast_tx *
|
|
mesh_fast_tx_get(struct ieee80211_sub_if_data *sdata, const u8 *addr);
|
|
bool ieee80211_mesh_xmit_fast(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb, u32 ctrl_flags);
|
|
void mesh_fast_tx_cache(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb, struct mesh_path *mpath);
|
|
void mesh_fast_tx_gc(struct ieee80211_sub_if_data *sdata);
|
|
void mesh_fast_tx_flush_addr(struct ieee80211_sub_if_data *sdata,
|
|
const u8 *addr);
|
|
void mesh_fast_tx_flush_mpath(struct mesh_path *mpath);
|
|
void mesh_fast_tx_flush_sta(struct ieee80211_sub_if_data *sdata,
|
|
struct sta_info *sta);
|
|
void mesh_path_refresh(struct ieee80211_sub_if_data *sdata,
|
|
struct mesh_path *mpath, const u8 *addr);
|
|
|
|
#ifdef CONFIG_MAC80211_MESH
|
|
static inline
|
|
u64 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
|
|
u64 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_tsf(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 */
|