mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
![Javier Cardona](/assets/img/avatar_default.png)
The mesh config information element has changed significantly since draft 1.08 This patch brings it up to date. Thanks to Sam Leffler and Rui Paulo for identifying this. Signed-off-by: Javier Cardona <javier@cozybit.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
718 lines
20 KiB
C
718 lines
20 KiB
C
/*
|
|
* Copyright (c) 2008 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 <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 PP_OFFSET 1 /* Path Selection Protocol */
|
|
#define PM_OFFSET 5 /* Path Selection Metric */
|
|
#define CC_OFFSET 9 /* Congestion Control Mode */
|
|
#define SP_OFFSET 13 /* Synchronization Protocol */
|
|
#define AUTH_OFFSET 17 /* Authentication Protocol */
|
|
#define CAPAB_OFFSET 22
|
|
#define CAPAB_ACCEPT_PLINKS 0x80
|
|
#define CAPAB_FORWARDING 0x10
|
|
|
|
#define TMR_RUNNING_HK 0
|
|
#define TMR_RUNNING_MP 1
|
|
|
|
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;
|
|
|
|
ifmsh->wrkq_flags |= MESH_WORK_HOUSEKEEPING;
|
|
|
|
if (local->quiescing) {
|
|
set_bit(TMR_RUNNING_HK, &ifmsh->timers_running);
|
|
return;
|
|
}
|
|
|
|
ieee80211_queue_work(&local->hw, &ifmsh->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 &&
|
|
memcmp(ifmsh->mesh_pp_id, ie->mesh_config + PP_OFFSET, 4) == 0 &&
|
|
memcmp(ifmsh->mesh_pm_id, ie->mesh_config + PM_OFFSET, 4) == 0 &&
|
|
memcmp(ifmsh->mesh_cc_id, ie->mesh_config + CC_OFFSET, 4) == 0 &&
|
|
memcmp(ifmsh->mesh_sp_id, ie->mesh_config + SP_OFFSET, 4) == 0 &&
|
|
memcmp(ifmsh->mesh_auth_id, ie->mesh_config + AUTH_OFFSET, 4) == 0)
|
|
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 + CAPAB_OFFSET) & 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)
|
|
{
|
|
u8 oui[3] = {0x00, 0x0F, 0xAC};
|
|
|
|
memcpy(sta->mesh_pp_id, oui, sizeof(oui));
|
|
memcpy(sta->mesh_pm_id, oui, sizeof(oui));
|
|
memcpy(sta->mesh_cc_id, oui, sizeof(oui));
|
|
memcpy(sta->mesh_sp_id, oui, sizeof(oui));
|
|
memcpy(sta->mesh_auth_id, oui, sizeof(oui));
|
|
sta->mesh_pp_id[sizeof(oui)] = 0;
|
|
sta->mesh_pm_id[sizeof(oui)] = 0;
|
|
sta->mesh_cc_id[sizeof(oui)] = 0xff;
|
|
sta->mesh_sp_id[sizeof(oui)] = 0xff;
|
|
sta->mesh_auth_id[sizeof(oui)] = 0x0;
|
|
}
|
|
|
|
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;
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
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 + IEEE80211_MESH_CONFIG_LEN);
|
|
*pos++ = WLAN_EID_MESH_CONFIG;
|
|
*pos++ = IEEE80211_MESH_CONFIG_LEN;
|
|
/* Version */
|
|
*pos++ = 1;
|
|
|
|
/* Active path selection protocol ID */
|
|
memcpy(pos, sdata->u.mesh.mesh_pp_id, 4);
|
|
pos += 4;
|
|
|
|
/* Active path selection metric ID */
|
|
memcpy(pos, sdata->u.mesh.mesh_pm_id, 4);
|
|
pos += 4;
|
|
|
|
/* Congestion control mode identifier */
|
|
memcpy(pos, sdata->u.mesh.mesh_cc_id, 4);
|
|
pos += 4;
|
|
|
|
/* Synchronization protocol identifier */
|
|
memcpy(pos, sdata->u.mesh.mesh_sp_id, 4);
|
|
pos += 4;
|
|
|
|
/* Authentication Protocol identifier */
|
|
memcpy(pos, sdata->u.mesh.mesh_auth_id, 4);
|
|
pos += 4;
|
|
|
|
/* Mesh Formation Info */
|
|
memset(pos, 0x00, 1);
|
|
pos += 1;
|
|
|
|
/* Mesh capability */
|
|
sdata->u.mesh.accepting_plinks = mesh_plink_availables(sdata);
|
|
*pos = CAPAB_FORWARDING;
|
|
*pos++ |= sdata->u.mesh.accepting_plinks ? CAPAB_ACCEPT_PLINKS : 0x00;
|
|
*pos++ = 0x00;
|
|
|
|
return;
|
|
}
|
|
|
|
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, &ifmsh->work);
|
|
}
|
|
|
|
/**
|
|
* 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, char
|
|
*meshda, char *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->dev->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));
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
|
|
/* might restart the timer but that doesn't matter */
|
|
cancel_work_sync(&ifmsh->work);
|
|
|
|
/* 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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
#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;
|
|
|
|
ifmsh->wrkq_flags |= MESH_WORK_HOUSEKEEPING;
|
|
ieee80211_queue_work(&local->hw, &ifmsh->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)
|
|
{
|
|
del_timer_sync(&sdata->u.mesh.housekeeping_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->u.mesh.work);
|
|
|
|
/*
|
|
* When we get here, the interface is marked down.
|
|
* Call synchronize_rcu() to wait for the RX path
|
|
* should it be using the interface and enqueuing
|
|
* frames at this very time on another CPU.
|
|
*/
|
|
rcu_barrier(); /* Wait for RX path and call_rcu()'s */
|
|
skb_queue_purge(&sdata->u.mesh.skb_queue);
|
|
}
|
|
|
|
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->dev->dev_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 PLINK_CATEGORY:
|
|
mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
|
|
break;
|
|
case MESH_PATH_SEL_CATEGORY:
|
|
mesh_rx_path_sel_frame(sdata, mgmt, len);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
static void ieee80211_mesh_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
container_of(work, struct ieee80211_sub_if_data, u.mesh.work);
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
struct sk_buff *skb;
|
|
|
|
if (!netif_running(sdata->dev))
|
|
return;
|
|
|
|
if (local->scanning)
|
|
return;
|
|
|
|
while ((skb = skb_dequeue(&ifmsh->skb_queue)))
|
|
ieee80211_mesh_rx_queued_mgmt(sdata, skb);
|
|
|
|
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);
|
|
}
|
|
|
|
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->u.mesh.work);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
|
|
INIT_WORK(&ifmsh->work, ieee80211_mesh_work);
|
|
setup_timer(&ifmsh->housekeeping_timer,
|
|
ieee80211_mesh_housekeeping_timer,
|
|
(unsigned long) sdata);
|
|
skb_queue_head_init(&sdata->u.mesh.skb_queue);
|
|
|
|
ifmsh->mshcfg.dot11MeshRetryTimeout = MESH_RET_T;
|
|
ifmsh->mshcfg.dot11MeshConfirmTimeout = MESH_CONF_T;
|
|
ifmsh->mshcfg.dot11MeshHoldingTimeout = MESH_HOLD_T;
|
|
ifmsh->mshcfg.dot11MeshMaxRetries = MESH_MAX_RETR;
|
|
ifmsh->mshcfg.dot11MeshTTL = MESH_TTL;
|
|
ifmsh->mshcfg.auto_open_plinks = true;
|
|
ifmsh->mshcfg.dot11MeshMaxPeerLinks =
|
|
MESH_MAX_ESTAB_PLINKS;
|
|
ifmsh->mshcfg.dot11MeshHWMPactivePathTimeout =
|
|
MESH_PATH_TIMEOUT;
|
|
ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval =
|
|
MESH_PREQ_MIN_INT;
|
|
ifmsh->mshcfg.dot11MeshHWMPnetDiameterTraversalTime =
|
|
MESH_DIAM_TRAVERSAL_TIME;
|
|
ifmsh->mshcfg.dot11MeshHWMPmaxPREQretries =
|
|
MESH_MAX_PREQ_RETRIES;
|
|
ifmsh->mshcfg.path_refresh_time =
|
|
MESH_PATH_REFRESH_TIME;
|
|
ifmsh->mshcfg.min_discovery_timeout =
|
|
MESH_MIN_DISCOVERY_TIMEOUT;
|
|
ifmsh->accepting_plinks = true;
|
|
ifmsh->preq_id = 0;
|
|
ifmsh->dsn = 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);
|
|
INIT_LIST_HEAD(&ifmsh->preq_queue.list);
|
|
spin_lock_init(&ifmsh->mesh_preq_queue_lock);
|
|
}
|
|
|
|
ieee80211_rx_result
|
|
ieee80211_mesh_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
struct ieee80211_mgmt *mgmt;
|
|
u16 fc;
|
|
|
|
if (skb->len < 24)
|
|
return RX_DROP_MONITOR;
|
|
|
|
mgmt = (struct ieee80211_mgmt *) skb->data;
|
|
fc = le16_to_cpu(mgmt->frame_control);
|
|
|
|
switch (fc & IEEE80211_FCTL_STYPE) {
|
|
case IEEE80211_STYPE_ACTION:
|
|
if (skb->len < IEEE80211_MIN_ACTION_SIZE)
|
|
return RX_DROP_MONITOR;
|
|
/* fall through */
|
|
case IEEE80211_STYPE_PROBE_RESP:
|
|
case IEEE80211_STYPE_BEACON:
|
|
skb_queue_tail(&ifmsh->skb_queue, skb);
|
|
ieee80211_queue_work(&local->hw, &ifmsh->work);
|
|
return RX_QUEUED;
|
|
}
|
|
|
|
return RX_CONTINUE;
|
|
}
|