![Johannes Berg](/assets/img/avatar_default.png)
Instead of tying mesh activity to interface up, add join and leave commands for mesh. Since we must be backward compatible, let cfg80211 handle joining a mesh if a mesh ID was pre-configured when the device goes up. Note that this therefore must modify mac80211 as well since mac80211 needs to lose the logic to start the mesh on interface up. We now allow querying mesh parameters before the mesh is connected, which simply returns defaults. Setting them (internally renamed to "update") is only allowed while connected. Specify them with the new mesh join command instead where needed. In mac80211, beaconing must now also follow the mesh enabled/not enabled state, which is done by testing the mesh ID. Signed-off-by: Javier Cardona <javier@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
701 lines
20 KiB
C
701 lines
20 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/slab.h>
|
|
#include <asm/unaligned.h>
|
|
#include "ieee80211_i.h"
|
|
#include "mesh.h"
|
|
|
|
#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
|
|
#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
|
|
#define IEEE80211_MESH_RANN_INTERVAL (1 * HZ)
|
|
|
|
#define MESHCONF_CAPAB_ACCEPT_PLINKS 0x01
|
|
#define MESHCONF_CAPAB_FORWARDING 0x08
|
|
|
|
#define TMR_RUNNING_HK 0
|
|
#define TMR_RUNNING_MP 1
|
|
#define TMR_RUNNING_MPR 2
|
|
|
|
int mesh_allocated;
|
|
static struct kmem_cache *rm_cache;
|
|
|
|
void ieee80211s_init(void)
|
|
{
|
|
mesh_pathtbl_init();
|
|
mesh_allocated = 1;
|
|
rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry),
|
|
0, 0, NULL);
|
|
}
|
|
|
|
void ieee80211s_stop(void)
|
|
{
|
|
mesh_pathtbl_unregister();
|
|
kmem_cache_destroy(rm_cache);
|
|
}
|
|
|
|
static void ieee80211_mesh_housekeeping_timer(unsigned long data)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = (void *) data;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
|
|
set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
|
|
|
|
if (local->quiescing) {
|
|
set_bit(TMR_RUNNING_HK, &ifmsh->timers_running);
|
|
return;
|
|
}
|
|
|
|
ieee80211_queue_work(&local->hw, &sdata->work);
|
|
}
|
|
|
|
/**
|
|
* mesh_matches_local - check if the config of a mesh point matches ours
|
|
*
|
|
* @ie: information elements of a management frame from the mesh peer
|
|
* @sdata: local mesh subif
|
|
*
|
|
* This function checks if the mesh configuration of a mesh point matches the
|
|
* local mesh configuration, i.e. if both nodes belong to the same mesh network.
|
|
*/
|
|
bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
|
|
/*
|
|
* As support for each feature is added, check for matching
|
|
* - On mesh config capabilities
|
|
* - Power Save Support En
|
|
* - Sync support enabled
|
|
* - Sync support active
|
|
* - Sync support required from peer
|
|
* - MDA enabled
|
|
* - Power management control on fc
|
|
*/
|
|
if (ifmsh->mesh_id_len == ie->mesh_id_len &&
|
|
memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 &&
|
|
(ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) &&
|
|
(ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) &&
|
|
(ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) &&
|
|
(ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) &&
|
|
(ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* mesh_peer_accepts_plinks - check if an mp is willing to establish peer links
|
|
*
|
|
* @ie: information elements of a management frame from the mesh peer
|
|
*/
|
|
bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie)
|
|
{
|
|
return (ie->mesh_config->meshconf_cap &
|
|
MESHCONF_CAPAB_ACCEPT_PLINKS) != 0;
|
|
}
|
|
|
|
/**
|
|
* mesh_accept_plinks_update: update accepting_plink in local mesh beacons
|
|
*
|
|
* @sdata: mesh interface in which mesh beacons are going to be updated
|
|
*/
|
|
void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
bool free_plinks;
|
|
|
|
/* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0,
|
|
* the mesh interface might be able to establish plinks with peers that
|
|
* are already on the table but are not on PLINK_ESTAB state. However,
|
|
* in general the mesh interface is not accepting peer link requests
|
|
* from new peers, and that must be reflected in the beacon
|
|
*/
|
|
free_plinks = mesh_plink_availables(sdata);
|
|
|
|
if (free_plinks != sdata->u.mesh.accepting_plinks)
|
|
ieee80211_mesh_housekeeping_timer((unsigned long) sdata);
|
|
}
|
|
|
|
void mesh_ids_set_default(struct ieee80211_if_mesh *sta)
|
|
{
|
|
sta->mesh_pp_id = 0; /* HWMP */
|
|
sta->mesh_pm_id = 0; /* Airtime */
|
|
sta->mesh_cc_id = 0; /* Disabled */
|
|
sta->mesh_sp_id = 0; /* Neighbor Offset */
|
|
sta->mesh_auth_id = 0; /* Disabled */
|
|
}
|
|
|
|
int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
int i;
|
|
|
|
sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL);
|
|
if (!sdata->u.mesh.rmc)
|
|
return -ENOMEM;
|
|
sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1;
|
|
for (i = 0; i < RMC_BUCKETS; i++)
|
|
INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i].list);
|
|
return 0;
|
|
}
|
|
|
|
void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct mesh_rmc *rmc = sdata->u.mesh.rmc;
|
|
struct rmc_entry *p, *n;
|
|
int i;
|
|
|
|
if (!sdata->u.mesh.rmc)
|
|
return;
|
|
|
|
for (i = 0; i < RMC_BUCKETS; i++)
|
|
list_for_each_entry_safe(p, n, &rmc->bucket[i].list, list) {
|
|
list_del(&p->list);
|
|
kmem_cache_free(rm_cache, p);
|
|
}
|
|
|
|
kfree(rmc);
|
|
sdata->u.mesh.rmc = NULL;
|
|
}
|
|
|
|
/**
|
|
* mesh_rmc_check - Check frame in recent multicast cache and add if absent.
|
|
*
|
|
* @sa: source address
|
|
* @mesh_hdr: mesh_header
|
|
*
|
|
* Returns: 0 if the frame is not in the cache, nonzero otherwise.
|
|
*
|
|
* Checks using the source address and the mesh sequence number if we have
|
|
* received this frame lately. If the frame is not in the cache, it is added to
|
|
* it.
|
|
*/
|
|
int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr,
|
|
struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct mesh_rmc *rmc = sdata->u.mesh.rmc;
|
|
u32 seqnum = 0;
|
|
int entries = 0;
|
|
u8 idx;
|
|
struct rmc_entry *p, *n;
|
|
|
|
/* Don't care about endianness since only match matters */
|
|
memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));
|
|
idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask;
|
|
list_for_each_entry_safe(p, n, &rmc->bucket[idx].list, list) {
|
|
++entries;
|
|
if (time_after(jiffies, p->exp_time) ||
|
|
(entries == RMC_QUEUE_MAX_LEN)) {
|
|
list_del(&p->list);
|
|
kmem_cache_free(rm_cache, p);
|
|
--entries;
|
|
} else if ((seqnum == p->seqnum) &&
|
|
(memcmp(sa, p->sa, ETH_ALEN) == 0))
|
|
return -1;
|
|
}
|
|
|
|
p = kmem_cache_alloc(rm_cache, GFP_ATOMIC);
|
|
if (!p) {
|
|
printk(KERN_DEBUG "o11s: could not allocate RMC entry\n");
|
|
return 0;
|
|
}
|
|
p->seqnum = seqnum;
|
|
p->exp_time = jiffies + RMC_TIMEOUT;
|
|
memcpy(p->sa, sa, ETH_ALEN);
|
|
list_add(&p->list, &rmc->bucket[idx].list);
|
|
return 0;
|
|
}
|
|
|
|
void mesh_mgmt_ies_add(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_supported_band *sband;
|
|
u8 *pos;
|
|
int len, i, rate;
|
|
u8 neighbors;
|
|
|
|
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
|
len = sband->n_bitrates;
|
|
if (len > 8)
|
|
len = 8;
|
|
pos = skb_put(skb, len + 2);
|
|
*pos++ = WLAN_EID_SUPP_RATES;
|
|
*pos++ = len;
|
|
for (i = 0; i < len; i++) {
|
|
rate = sband->bitrates[i].bitrate;
|
|
*pos++ = (u8) (rate / 5);
|
|
}
|
|
|
|
if (sband->n_bitrates > len) {
|
|
pos = skb_put(skb, sband->n_bitrates - len + 2);
|
|
*pos++ = WLAN_EID_EXT_SUPP_RATES;
|
|
*pos++ = sband->n_bitrates - len;
|
|
for (i = len; i < sband->n_bitrates; i++) {
|
|
rate = sband->bitrates[i].bitrate;
|
|
*pos++ = (u8) (rate / 5);
|
|
}
|
|
}
|
|
|
|
if (sband->band == IEEE80211_BAND_2GHZ) {
|
|
pos = skb_put(skb, 2 + 1);
|
|
*pos++ = WLAN_EID_DS_PARAMS;
|
|
*pos++ = 1;
|
|
*pos++ = ieee80211_frequency_to_channel(local->hw.conf.channel->center_freq);
|
|
}
|
|
|
|
pos = skb_put(skb, 2 + sdata->u.mesh.mesh_id_len);
|
|
*pos++ = WLAN_EID_MESH_ID;
|
|
*pos++ = sdata->u.mesh.mesh_id_len;
|
|
if (sdata->u.mesh.mesh_id_len)
|
|
memcpy(pos, sdata->u.mesh.mesh_id, sdata->u.mesh.mesh_id_len);
|
|
|
|
pos = skb_put(skb, 2 + sizeof(struct ieee80211_meshconf_ie));
|
|
*pos++ = WLAN_EID_MESH_CONFIG;
|
|
*pos++ = sizeof(struct ieee80211_meshconf_ie);
|
|
|
|
/* Active path selection protocol ID */
|
|
*pos++ = sdata->u.mesh.mesh_pp_id;
|
|
|
|
/* Active path selection metric ID */
|
|
*pos++ = sdata->u.mesh.mesh_pm_id;
|
|
|
|
/* Congestion control mode identifier */
|
|
*pos++ = sdata->u.mesh.mesh_cc_id;
|
|
|
|
/* Synchronization protocol identifier */
|
|
*pos++ = sdata->u.mesh.mesh_sp_id;
|
|
|
|
/* Authentication Protocol identifier */
|
|
*pos++ = sdata->u.mesh.mesh_auth_id;
|
|
|
|
/* Mesh Formation Info - number of neighbors */
|
|
neighbors = atomic_read(&sdata->u.mesh.mshstats.estab_plinks);
|
|
/* Number of neighbor mesh STAs or 15 whichever is smaller */
|
|
neighbors = (neighbors > 15) ? 15 : neighbors;
|
|
*pos++ = neighbors << 1;
|
|
|
|
/* Mesh capability */
|
|
sdata->u.mesh.accepting_plinks = mesh_plink_availables(sdata);
|
|
*pos = MESHCONF_CAPAB_FORWARDING;
|
|
*pos++ |= sdata->u.mesh.accepting_plinks ?
|
|
MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00;
|
|
*pos++ = 0x00;
|
|
}
|
|
|
|
u32 mesh_table_hash(u8 *addr, struct ieee80211_sub_if_data *sdata, struct mesh_table *tbl)
|
|
{
|
|
/* Use last four bytes of hw addr and interface index as hash index */
|
|
return jhash_2words(*(u32 *)(addr+2), sdata->dev->ifindex, tbl->hash_rnd)
|
|
& tbl->hash_mask;
|
|
}
|
|
|
|
struct mesh_table *mesh_table_alloc(int size_order)
|
|
{
|
|
int i;
|
|
struct mesh_table *newtbl;
|
|
|
|
newtbl = kmalloc(sizeof(struct mesh_table), GFP_KERNEL);
|
|
if (!newtbl)
|
|
return NULL;
|
|
|
|
newtbl->hash_buckets = kzalloc(sizeof(struct hlist_head) *
|
|
(1 << size_order), GFP_KERNEL);
|
|
|
|
if (!newtbl->hash_buckets) {
|
|
kfree(newtbl);
|
|
return NULL;
|
|
}
|
|
|
|
newtbl->hashwlock = kmalloc(sizeof(spinlock_t) *
|
|
(1 << size_order), GFP_KERNEL);
|
|
if (!newtbl->hashwlock) {
|
|
kfree(newtbl->hash_buckets);
|
|
kfree(newtbl);
|
|
return NULL;
|
|
}
|
|
|
|
newtbl->size_order = size_order;
|
|
newtbl->hash_mask = (1 << size_order) - 1;
|
|
atomic_set(&newtbl->entries, 0);
|
|
get_random_bytes(&newtbl->hash_rnd,
|
|
sizeof(newtbl->hash_rnd));
|
|
for (i = 0; i <= newtbl->hash_mask; i++)
|
|
spin_lock_init(&newtbl->hashwlock[i]);
|
|
|
|
return newtbl;
|
|
}
|
|
|
|
|
|
static void ieee80211_mesh_path_timer(unsigned long data)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
(struct ieee80211_sub_if_data *) data;
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
if (local->quiescing) {
|
|
set_bit(TMR_RUNNING_MP, &ifmsh->timers_running);
|
|
return;
|
|
}
|
|
|
|
ieee80211_queue_work(&local->hw, &sdata->work);
|
|
}
|
|
|
|
static void ieee80211_mesh_path_root_timer(unsigned long data)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
(struct ieee80211_sub_if_data *) data;
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
|
|
|
|
if (local->quiescing) {
|
|
set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running);
|
|
return;
|
|
}
|
|
|
|
ieee80211_queue_work(&local->hw, &sdata->work);
|
|
}
|
|
|
|
void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
|
|
{
|
|
if (ifmsh->mshcfg.dot11MeshHWMPRootMode)
|
|
set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
|
|
else {
|
|
clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
|
|
/* stop running timer */
|
|
del_timer_sync(&ifmsh->mesh_path_root_timer);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
|
|
* @hdr: 802.11 frame header
|
|
* @fc: frame control field
|
|
* @meshda: destination address in the mesh
|
|
* @meshsa: source address address in the mesh. Same as TA, as frame is
|
|
* locally originated.
|
|
*
|
|
* Return the length of the 802.11 (does not include a mesh control header)
|
|
*/
|
|
int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
|
|
const u8 *meshda, const u8 *meshsa)
|
|
{
|
|
if (is_multicast_ether_addr(meshda)) {
|
|
*fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
|
|
/* DA TA SA */
|
|
memcpy(hdr->addr1, meshda, ETH_ALEN);
|
|
memcpy(hdr->addr2, meshsa, ETH_ALEN);
|
|
memcpy(hdr->addr3, meshsa, ETH_ALEN);
|
|
return 24;
|
|
} else {
|
|
*fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
|
|
IEEE80211_FCTL_TODS);
|
|
/* RA TA DA SA */
|
|
memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */
|
|
memcpy(hdr->addr2, meshsa, ETH_ALEN);
|
|
memcpy(hdr->addr3, meshda, ETH_ALEN);
|
|
memcpy(hdr->addr4, meshsa, ETH_ALEN);
|
|
return 30;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ieee80211_new_mesh_header - create a new mesh header
|
|
* @meshhdr: uninitialized mesh header
|
|
* @sdata: mesh interface to be used
|
|
* @addr4: addr4 of the mesh frame (1st in ae header)
|
|
* may be NULL
|
|
* @addr5: addr5 of the mesh frame (1st or 2nd in ae header)
|
|
* may be NULL unless addr6 is present
|
|
* @addr6: addr6 of the mesh frame (2nd or 3rd in ae header)
|
|
* may be NULL unless addr5 is present
|
|
*
|
|
* Return the header length.
|
|
*/
|
|
int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr,
|
|
struct ieee80211_sub_if_data *sdata, char *addr4,
|
|
char *addr5, char *addr6)
|
|
{
|
|
int aelen = 0;
|
|
memset(meshhdr, 0, sizeof(*meshhdr));
|
|
meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
|
|
put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum);
|
|
sdata->u.mesh.mesh_seqnum++;
|
|
if (addr4) {
|
|
meshhdr->flags |= MESH_FLAGS_AE_A4;
|
|
aelen += ETH_ALEN;
|
|
memcpy(meshhdr->eaddr1, addr4, ETH_ALEN);
|
|
}
|
|
if (addr5 && addr6) {
|
|
meshhdr->flags |= MESH_FLAGS_AE_A5_A6;
|
|
aelen += 2 * ETH_ALEN;
|
|
if (!addr4) {
|
|
memcpy(meshhdr->eaddr1, addr5, ETH_ALEN);
|
|
memcpy(meshhdr->eaddr2, addr6, ETH_ALEN);
|
|
} else {
|
|
memcpy(meshhdr->eaddr2, addr5, ETH_ALEN);
|
|
memcpy(meshhdr->eaddr3, addr6, ETH_ALEN);
|
|
}
|
|
}
|
|
return 6 + aelen;
|
|
}
|
|
|
|
static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_if_mesh *ifmsh)
|
|
{
|
|
bool free_plinks;
|
|
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
printk(KERN_DEBUG "%s: running mesh housekeeping\n",
|
|
sdata->name);
|
|
#endif
|
|
|
|
ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
|
|
mesh_path_expire(sdata);
|
|
|
|
free_plinks = mesh_plink_availables(sdata);
|
|
if (free_plinks != sdata->u.mesh.accepting_plinks)
|
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
|
|
|
|
mod_timer(&ifmsh->housekeeping_timer,
|
|
round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL));
|
|
}
|
|
|
|
static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
|
|
mesh_path_tx_root_frame(sdata);
|
|
mod_timer(&ifmsh->mesh_path_root_timer,
|
|
round_jiffies(jiffies + IEEE80211_MESH_RANN_INTERVAL));
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
|
|
/* use atomic bitops in case both timers fire at the same time */
|
|
|
|
if (del_timer_sync(&ifmsh->housekeeping_timer))
|
|
set_bit(TMR_RUNNING_HK, &ifmsh->timers_running);
|
|
if (del_timer_sync(&ifmsh->mesh_path_timer))
|
|
set_bit(TMR_RUNNING_MP, &ifmsh->timers_running);
|
|
if (del_timer_sync(&ifmsh->mesh_path_root_timer))
|
|
set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running);
|
|
}
|
|
|
|
void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
|
|
if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running))
|
|
add_timer(&ifmsh->housekeeping_timer);
|
|
if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running))
|
|
add_timer(&ifmsh->mesh_path_timer);
|
|
if (test_and_clear_bit(TMR_RUNNING_MPR, &ifmsh->timers_running))
|
|
add_timer(&ifmsh->mesh_path_root_timer);
|
|
ieee80211_mesh_root_setup(ifmsh);
|
|
}
|
|
#endif
|
|
|
|
void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
local->fif_other_bss++;
|
|
/* mesh ifaces must set allmulti to forward mcast traffic */
|
|
atomic_inc(&local->iff_allmultis);
|
|
ieee80211_configure_filter(local);
|
|
|
|
set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
|
|
ieee80211_mesh_root_setup(ifmsh);
|
|
ieee80211_queue_work(&local->hw, &sdata->work);
|
|
sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL;
|
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON |
|
|
BSS_CHANGED_BEACON_ENABLED |
|
|
BSS_CHANGED_BEACON_INT);
|
|
}
|
|
|
|
void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
|
|
ifmsh->mesh_id_len = 0;
|
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
|
|
sta_info_flush(local, NULL);
|
|
|
|
del_timer_sync(&sdata->u.mesh.housekeeping_timer);
|
|
del_timer_sync(&sdata->u.mesh.mesh_path_root_timer);
|
|
/*
|
|
* If the timer fired while we waited for it, it will have
|
|
* requeued the work. Now the work will be running again
|
|
* but will not rearm the timer again because it checks
|
|
* whether the interface is running, which, at this point,
|
|
* it no longer is.
|
|
*/
|
|
cancel_work_sync(&sdata->work);
|
|
|
|
local->fif_other_bss--;
|
|
atomic_dec(&local->iff_allmultis);
|
|
ieee80211_configure_filter(local);
|
|
}
|
|
|
|
static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
|
|
u16 stype,
|
|
struct ieee80211_mgmt *mgmt,
|
|
size_t len,
|
|
struct ieee80211_rx_status *rx_status)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee802_11_elems elems;
|
|
struct ieee80211_channel *channel;
|
|
u32 supp_rates = 0;
|
|
size_t baselen;
|
|
int freq;
|
|
enum ieee80211_band band = rx_status->band;
|
|
|
|
/* ignore ProbeResp to foreign address */
|
|
if (stype == IEEE80211_STYPE_PROBE_RESP &&
|
|
compare_ether_addr(mgmt->da, sdata->vif.addr))
|
|
return;
|
|
|
|
baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
|
|
if (baselen > len)
|
|
return;
|
|
|
|
ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
|
|
&elems);
|
|
|
|
if (elems.ds_params && elems.ds_params_len == 1)
|
|
freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
|
|
else
|
|
freq = rx_status->freq;
|
|
|
|
channel = ieee80211_get_channel(local->hw.wiphy, freq);
|
|
|
|
if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
|
|
return;
|
|
|
|
if (elems.mesh_id && elems.mesh_config &&
|
|
mesh_matches_local(&elems, sdata)) {
|
|
supp_rates = ieee80211_sta_get_rates(local, &elems, band);
|
|
|
|
mesh_neighbour_update(mgmt->sa, supp_rates, sdata,
|
|
mesh_peer_accepts_plinks(&elems));
|
|
}
|
|
}
|
|
|
|
static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt,
|
|
size_t len,
|
|
struct ieee80211_rx_status *rx_status)
|
|
{
|
|
switch (mgmt->u.action.category) {
|
|
case WLAN_CATEGORY_MESH_PLINK:
|
|
mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
|
|
break;
|
|
case WLAN_CATEGORY_MESH_PATH_SEL:
|
|
mesh_rx_path_sel_frame(sdata, mgmt, len);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_rx_status *rx_status;
|
|
struct ieee80211_if_mesh *ifmsh;
|
|
struct ieee80211_mgmt *mgmt;
|
|
u16 stype;
|
|
|
|
ifmsh = &sdata->u.mesh;
|
|
|
|
rx_status = IEEE80211_SKB_RXCB(skb);
|
|
mgmt = (struct ieee80211_mgmt *) skb->data;
|
|
stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
|
|
|
|
switch (stype) {
|
|
case IEEE80211_STYPE_PROBE_RESP:
|
|
case IEEE80211_STYPE_BEACON:
|
|
ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len,
|
|
rx_status);
|
|
break;
|
|
case IEEE80211_STYPE_ACTION:
|
|
ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
|
|
if (ifmsh->preq_queue_len &&
|
|
time_after(jiffies,
|
|
ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval)))
|
|
mesh_path_start_discovery(sdata);
|
|
|
|
if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags))
|
|
mesh_mpath_table_grow();
|
|
|
|
if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags))
|
|
mesh_mpp_table_grow();
|
|
|
|
if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags))
|
|
ieee80211_mesh_housekeeping(sdata, ifmsh);
|
|
|
|
if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags))
|
|
ieee80211_mesh_rootpath(sdata);
|
|
}
|
|
|
|
void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(sdata, &local->interfaces, list)
|
|
if (ieee80211_vif_is_mesh(&sdata->vif))
|
|
ieee80211_queue_work(&local->hw, &sdata->work);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
|
|
setup_timer(&ifmsh->housekeeping_timer,
|
|
ieee80211_mesh_housekeeping_timer,
|
|
(unsigned long) sdata);
|
|
|
|
ifmsh->accepting_plinks = true;
|
|
ifmsh->preq_id = 0;
|
|
ifmsh->sn = 0;
|
|
atomic_set(&ifmsh->mpaths, 0);
|
|
mesh_rmc_init(sdata);
|
|
ifmsh->last_preq = jiffies;
|
|
/* Allocate all mesh structures when creating the first mesh interface. */
|
|
if (!mesh_allocated)
|
|
ieee80211s_init();
|
|
mesh_ids_set_default(ifmsh);
|
|
setup_timer(&ifmsh->mesh_path_timer,
|
|
ieee80211_mesh_path_timer,
|
|
(unsigned long) sdata);
|
|
setup_timer(&ifmsh->mesh_path_root_timer,
|
|
ieee80211_mesh_path_root_timer,
|
|
(unsigned long) sdata);
|
|
INIT_LIST_HEAD(&ifmsh->preq_queue.list);
|
|
spin_lock_init(&ifmsh->mesh_preq_queue_lock);
|
|
}
|