Release 4.11 net/mac80211/mesh_plink.c
/*
* Copyright (c) 2008, 2009 open80211s Ltd.
* Author: Luis Carlos Cobo <luisca@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/gfp.h>
#include <linux/kernel.h>
#include <linux/random.h>
#include <linux/rculist.h>
#include "ieee80211_i.h"
#include "rate.h"
#include "mesh.h"
#define PLINK_CNF_AID(mgmt) ((mgmt)->u.action.u.self_prot.variable + 2)
#define PLINK_GET_LLID(p) (p + 2)
#define PLINK_GET_PLID(p) (p + 4)
#define mod_plink_timer(s, t) (mod_timer(&s->mesh->plink_timer, \
jiffies + msecs_to_jiffies(t)))
enum plink_event {
PLINK_UNDEFINED,
OPN_ACPT,
OPN_RJCT,
OPN_IGNR,
CNF_ACPT,
CNF_RJCT,
CNF_IGNR,
CLS_ACPT,
CLS_IGNR
};
static const char * const mplstates[] = {
[NL80211_PLINK_LISTEN] = "LISTEN",
[NL80211_PLINK_OPN_SNT] = "OPN-SNT",
[NL80211_PLINK_OPN_RCVD] = "OPN-RCVD",
[NL80211_PLINK_CNF_RCVD] = "CNF_RCVD",
[NL80211_PLINK_ESTAB] = "ESTAB",
[NL80211_PLINK_HOLDING] = "HOLDING",
[NL80211_PLINK_BLOCKED] = "BLOCKED"
};
static const char * const mplevents[] = {
[PLINK_UNDEFINED] = "NONE",
[OPN_ACPT] = "OPN_ACPT",
[OPN_RJCT] = "OPN_RJCT",
[OPN_IGNR] = "OPN_IGNR",
[CNF_ACPT] = "CNF_ACPT",
[CNF_RJCT] = "CNF_RJCT",
[CNF_IGNR] = "CNF_IGNR",
[CLS_ACPT] = "CLS_ACPT",
[CLS_IGNR] = "CLS_IGNR"
};
/* We only need a valid sta if user configured a minimum rssi_threshold. */
static bool rssi_threshold_check(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta)
{
s32 rssi_threshold = sdata->u.mesh.mshcfg.rssi_threshold;
return rssi_threshold == 0 ||
(sta &&
(s8)-ewma_signal_read(&sta->rx_stats_avg.signal) >
rssi_threshold);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 50 | 92.59% | 1 | 25.00% |
Johannes Berg | 4 | 7.41% | 3 | 75.00% |
Total | 54 | 100.00% | 4 | 100.00% |
/**
* mesh_plink_fsm_restart - restart a mesh peer link finite state machine
*
* @sta: mesh peer link to restart
*
* Locking: this function must be called holding sta->mesh->plink_lock
*/
static inline void mesh_plink_fsm_restart(struct sta_info *sta)
{
lockdep_assert_held(&sta->mesh->plink_lock);
sta->mesh->plink_state = NL80211_PLINK_LISTEN;
sta->mesh->llid = sta->mesh->plid = sta->mesh->reason = 0;
sta->mesh->plink_retries = 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Luis Carlos Cobo Rus | 37 | 63.79% | 2 | 40.00% |
Johannes Berg | 12 | 20.69% | 1 | 20.00% |
Bob Copeland | 8 | 13.79% | 1 | 20.00% |
Javier Cardona | 1 | 1.72% | 1 | 20.00% |
Total | 58 | 100.00% | 5 | 100.00% |
/*
* mesh_set_short_slot_time - enable / disable ERP short slot time.
*
* The standard indirectly mandates mesh STAs to turn off short slot time by
* disallowing advertising this (802.11-2012 8.4.1.4), but that doesn't mean we
* can't be sneaky about it. Enable short slot time if all mesh STAs in the
* MBSS support ERP rates.
*
* Returns BSS_CHANGED_ERP_SLOT or 0 for no change.
*/
static u32 mesh_set_short_slot_time(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
enum nl80211_band band = ieee80211_get_sdata_band(sdata);
struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
struct sta_info *sta;
u32 erp_rates = 0, changed = 0;
int i;
bool short_slot = false;
if (band == NL80211_BAND_5GHZ) {
/* (IEEE 802.11-2012 19.4.5) */
short_slot = true;
goto out;
} else if (band != NL80211_BAND_2GHZ)
goto out;
for (i = 0; i < sband->n_bitrates; i++)
if (sband->bitrates[i].flags & IEEE80211_RATE_ERP_G)
erp_rates |= BIT(i);
if (!erp_rates)
goto out;
rcu_read_lock();
list_for_each_entry_rcu(sta, &local->sta_list, list) {
if (sdata != sta->sdata ||
sta->mesh->plink_state != NL80211_PLINK_ESTAB)
continue;
short_slot = false;
if (erp_rates & sta->sta.supp_rates[band])
short_slot = true;
else
break;
}
rcu_read_unlock();
out:
if (sdata->vif.bss_conf.use_short_slot != short_slot) {
sdata->vif.bss_conf.use_short_slot = short_slot;
changed = BSS_CHANGED_ERP_SLOT;
mpl_dbg(sdata, "mesh_plink %pM: ERP short slot time %d\n",
sdata->vif.addr, short_slot);
}
return changed;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Pedersen | 235 | 97.92% | 1 | 33.33% |
Johannes Berg | 5 | 2.08% | 2 | 66.67% |
Total | 240 | 100.00% | 3 | 100.00% |
/**
* mesh_set_ht_prot_mode - set correct HT protection mode
*
* Section 9.23.3.5 of IEEE 80211-2012 describes the protection rules for HT
* mesh STA in a MBSS. Three HT protection modes are supported for now, non-HT
* mixed mode, 20MHz-protection and no-protection mode. non-HT mixed mode is
* selected if any non-HT peers are present in our MBSS. 20MHz-protection mode
* is selected if all peers in our 20/40MHz MBSS support HT and atleast one
* HT20 peer is present. Otherwise no-protection mode is selected.
*/
static u32 mesh_set_ht_prot_mode(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
struct sta_info *sta;
u16 ht_opmode;
bool non_ht_sta = false, ht20_sta = false;
switch (sdata->vif.bss_conf.chandef.width) {
case NL80211_CHAN_WIDTH_20_NOHT:
case NL80211_CHAN_WIDTH_5:
case NL80211_CHAN_WIDTH_10:
return 0;
default:
break;
}
rcu_read_lock();
list_for_each_entry_rcu(sta, &local->sta_list, list) {
if (sdata != sta->sdata ||
sta->mesh->plink_state != NL80211_PLINK_ESTAB)
continue;
if (sta->sta.bandwidth > IEEE80211_STA_RX_BW_20)
continue;
if (!sta->sta.ht_cap.ht_supported) {
mpl_dbg(sdata, "nonHT sta (%pM) is present\n",
sta->sta.addr);
non_ht_sta = true;
break;
}
mpl_dbg(sdata, "HT20 sta (%pM) is present\n", sta->sta.addr);
ht20_sta = true;
}
rcu_read_unlock();
if (non_ht_sta)
ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED;
else if (ht20_sta &&
sdata->vif.bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_20MHZ;
else
ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
if (sdata->vif.bss_conf.ht_operation_mode == ht_opmode)
return 0;
sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
sdata->u.mesh.mshcfg.ht_opmode = ht_opmode;
mpl_dbg(sdata, "selected new HT protection mode %d\n", ht_opmode);
return BSS_CHANGED_HT;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Ashok Nagarajan | 173 | 72.08% | 3 | 33.33% |
Thomas Pedersen | 28 | 11.67% | 1 | 11.11% |
Johannes Berg | 25 | 10.42% | 4 | 44.44% |
Simon Wunderlich | 14 | 5.83% | 1 | 11.11% |
Total | 240 | 100.00% | 9 | 100.00% |
static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta,
enum ieee80211_self_protected_actioncode action,
u8 *da, u16 llid, u16 plid, u16 reason)
{
struct ieee80211_local *local = sdata->local;
struct sk_buff *skb;
struct ieee80211_tx_info *info;
struct ieee80211_mgmt *mgmt;
bool include_plid = false;
u16 peering_proto = 0;
u8 *pos, ie_len = 4;
int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.self_prot) +
sizeof(mgmt->u.action.u.self_prot);
int err = -ENOMEM;
skb = dev_alloc_skb(local->tx_headroom +
hdr_len +
2 + /* capability info */
2 + /* AID */
2 + 8 + /* supported rates */
2 + (IEEE80211_MAX_SUPP_RATES - 8) +
2 + sdata->u.mesh.mesh_id_len +
2 + sizeof(struct ieee80211_meshconf_ie) +
2 + sizeof(struct ieee80211_ht_cap) +
2 + sizeof(struct ieee80211_ht_operation) +
2 + sizeof(struct ieee80211_vht_cap) +
2 + sizeof(struct ieee80211_vht_operation) +
2 + 8 + /* peering IE */
sdata->u.mesh.ie_len);
if (!skb)
return err;
info = IEEE80211_SKB_CB(skb);
skb_reserve(skb, local->tx_headroom);
mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len);
memset(mgmt, 0, hdr_len);
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_ACTION);
memcpy(mgmt->da, da, ETH_ALEN);
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
mgmt->u.action.category = WLAN_CATEGORY_SELF_PROTECTED;
mgmt->u.action.u.self_prot.action_code = action;
if (action != WLAN_SP_MESH_PEERING_CLOSE) {
enum nl80211_band band = ieee80211_get_sdata_band(sdata);
/* capability info */
pos = skb_put(skb, 2);
memset(pos, 0, 2);
if (action == WLAN_SP_MESH_PEERING_CONFIRM) {
/* AID */
pos = skb_put(skb, 2);
put_unaligned_le16(sta->sta.aid, pos);
}
if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
mesh_add_rsn_ie(sdata, skb) ||
mesh_add_meshid_ie(sdata, skb) ||
mesh_add_meshconf_ie(sdata, skb))
goto free;
} else { /* WLAN_SP_MESH_PEERING_CLOSE */
info->flags |= IEEE80211_TX_CTL_NO_ACK;
if (mesh_add_meshid_ie(sdata, skb))
goto free;
}
/* Add Mesh Peering Management element */
switch (action) {
case WLAN_SP_MESH_PEERING_OPEN:
break;
case WLAN_SP_MESH_PEERING_CONFIRM:
ie_len += 2;
include_plid = true;
break;
case WLAN_SP_MESH_PEERING_CLOSE:
if (plid) {
ie_len += 2;
include_plid = true;
}
ie_len += 2; /* reason code */
break;
default:
err = -EINVAL;
goto free;
}
if (WARN_ON(skb_tailroom(skb) < 2 + ie_len))
goto free;
pos = skb_put(skb, 2 + ie_len);
*pos++ = WLAN_EID_PEER_MGMT;
*pos++ = ie_len;
memcpy(pos, &peering_proto, 2);
pos += 2;
put_unaligned_le16(llid, pos);
pos += 2;
if (include_plid) {
put_unaligned_le16(plid, pos);
pos += 2;
}
if (action == WLAN_SP_MESH_PEERING_CLOSE) {
put_unaligned_le16(reason, pos);
pos += 2;
}
if (action != WLAN_SP_MESH_PEERING_CLOSE) {
if (mesh_add_ht_cap_ie(sdata, skb) ||
mesh_add_ht_oper_ie(sdata, skb) ||
mesh_add_vht_cap_ie(sdata, skb) ||
mesh_add_vht_oper_ie(sdata, skb))
goto free;
}
if (mesh_add_vendor_ies(sdata, skb))
goto free;
ieee80211_tx_skb(sdata, skb);
return 0;
free:
kfree_skb(skb);
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Pedersen | 299 | 43.27% | 7 | 25.93% |
Luis Carlos Cobo Rus | 256 | 37.05% | 1 | 3.70% |
Bob Copeland | 41 | 5.93% | 3 | 11.11% |
Johannes Berg | 33 | 4.78% | 7 | 25.93% |
Javier Cardona | 17 | 2.46% | 2 | 7.41% |
Rui Paulo | 14 | 2.03% | 2 | 7.41% |
Chun-Yeow Yeoh | 11 | 1.59% | 1 | 3.70% |
Jasper Bryant-Greene | 8 | 1.16% | 1 | 3.70% |
Arik Nemtsov | 6 | 0.87% | 1 | 3.70% |
Ashok Nagarajan | 4 | 0.58% | 1 | 3.70% |
Harvey Harrison | 2 | 0.29% | 1 | 3.70% |
Total | 691 | 100.00% | 27 | 100.00% |
/**
* __mesh_plink_deactivate - deactivate mesh peer link
*
* @sta: mesh peer link to deactivate
*
* Mesh paths with this peer as next hop should be flushed
* by the caller outside of plink_lock.
*
* Returns beacon changed flag if the beacon content changed.
*
* Locking: the caller must hold sta->mesh->plink_lock
*/
static u32 __mesh_plink_deactivate(struct sta_info *sta)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
u32 changed = 0;
lockdep_assert_held(&sta->mesh->plink_lock);
if (sta->mesh->plink_state == NL80211_PLINK_ESTAB)
changed = mesh_plink_dec_estab_count(sdata);
sta->mesh->plink_state = NL80211_PLINK_BLOCKED;
ieee80211_mps_sta_status_update(sta);
changed |= ieee80211_mps_set_sta_local_pm(sta,
NL80211_MESH_POWER_UNKNOWN);
return changed;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 77 | 100.00% | 1 | 100.00% |
Total | 77 | 100.00% | 1 | 100.00% |
/**
* mesh_plink_deactivate - deactivate mesh peer link
*
* @sta: mesh peer link to deactivate
*
* All mesh paths with this peer as next hop will be flushed
*/
u32 mesh_plink_deactivate(struct sta_info *sta)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
u32 changed;
spin_lock_bh(&sta->mesh->plink_lock);
changed = __mesh_plink_deactivate(sta);
if (!sdata->u.mesh.user_mpm) {
sta->mesh->reason = WLAN_REASON_MESH_PEER_CANCELED;
mesh_plink_frame_tx(sdata, sta, WLAN_SP_MESH_PEERING_CLOSE,
sta->sta.addr, sta->mesh->llid,
sta->mesh->plid, sta->mesh->reason);
}
spin_unlock_bh(&sta->mesh->plink_lock);
if (!sdata->u.mesh.user_mpm)
del_timer_sync(&sta->mesh->plink_timer);
mesh_path_flush_by_nexthop(sta);
/* make sure no readers can access nexthop sta from here on */
synchronize_net();
return changed;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 136 | 100.00% | 4 | 100.00% |
Total | 136 | 100.00% | 4 | 100.00% |
static void mesh_sta_info_init(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta,
struct ieee802_11_elems *elems, bool insert)
{
struct ieee80211_local *local = sdata->local;
enum nl80211_band band = ieee80211_get_sdata_band(sdata);
struct ieee80211_supported_band *sband;
u32 rates, basic_rates = 0, changed = 0;
enum ieee80211_sta_rx_bandwidth bw = sta->sta.bandwidth;
sband = local->hw.wiphy->bands[band];
rates = ieee80211_sta_get_rates(sdata, elems, band, &basic_rates);
spin_lock_bh(&sta->mesh->plink_lock);
sta->rx_stats.last_rx = jiffies;
/* rates and capabilities don't change during peering */
if (sta->mesh->plink_state == NL80211_PLINK_ESTAB &&
sta->mesh->processed_beacon)
goto out;
sta->mesh->processed_beacon = true;
if (sta->sta.supp_rates[band] != rates)
changed |= IEEE80211_RC_SUPP_RATES_CHANGED;
sta->sta.supp_rates[band] = rates;
if (ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
elems->ht_cap_elem, sta))
changed |= IEEE80211_RC_BW_CHANGED;
ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
elems->vht_cap_elem, sta);
if (bw != sta->sta.bandwidth)
changed |= IEEE80211_RC_BW_CHANGED;
/* HT peer is operating 20MHz-only */
if (elems->ht_operation &&
!(elems->ht_operation->ht_param &
IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
if (sta->sta.bandwidth != IEEE80211_STA_RX_BW_20)
changed |= IEEE80211_RC_BW_CHANGED;
sta->sta.bandwidth = IEEE80211_STA_RX_BW_20;
}
if (insert)
rate_control_rate_init(sta);
else
rate_control_rate_update(local, sband, sta, changed);
out:
spin_unlock_bh(&sta->mesh->plink_lock);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Pedersen | 184 | 63.45% | 6 | 24.00% |
Johannes Berg | 24 | 8.28% | 8 | 32.00% |
Janusz Dziedzic | 24 | 8.28% | 1 | 4.00% |
Bob Copeland | 15 | 5.17% | 2 | 8.00% |
Luis Carlos Cobo Rus | 14 | 4.83% | 1 | 4.00% |
Alexis Green | 10 | 3.45% | 1 | 4.00% |
Chun-Yeow Yeoh | 8 | 2.76% | 1 | 4.00% |
Helmut Schaa | 4 | 1.38% | 1 | 4.00% |
Javier Cardona | 3 | 1.03% | 1 | 4.00% |
Jasper Bryant-Greene | 2 | 0.69% | 1 | 4.00% |
Ashok Nagarajan | 1 | 0.34% | 1 | 4.00% |
Simon Wunderlich | 1 | 0.34% | 1 | 4.00% |
Total | 290 | 100.00% | 25 | 100.00% |
static int mesh_allocate_aid(struct ieee80211_sub_if_data *sdata)
{
struct sta_info *sta;
unsigned long *aid_map;
int aid;
aid_map = kcalloc(BITS_TO_LONGS(IEEE80211_MAX_AID + 1),
sizeof(*aid_map), GFP_KERNEL);
if (!aid_map)
return -ENOMEM;
/* reserve aid 0 for mcast indication */
__set_bit(0, aid_map);
rcu_read_lock();
list_for_each_entry_rcu(sta, &sdata->local->sta_list, list)
__set_bit(sta->sta.aid, aid_map);
rcu_read_unlock();
aid = find_first_zero_bit(aid_map, IEEE80211_MAX_AID + 1);
kfree(aid_map);
if (aid > IEEE80211_MAX_AID)
return -ENOBUFS;
return aid;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 115 | 100.00% | 1 | 100.00% |
Total | 115 | 100.00% | 1 | 100.00% |
static struct sta_info *
__mesh_sta_info_alloc(struct ieee80211_sub_if_data *sdata, u8 *hw_addr)
{
struct sta_info *sta;
int aid;
if (sdata->local->num_sta >= MESH_MAX_PLINKS)
return NULL;
aid = mesh_allocate_aid(sdata);
if (aid < 0)
return NULL;
sta = sta_info_alloc(sdata, hw_addr, GFP_KERNEL);
if (!sta)
return NULL;
sta->mesh->plink_state = NL80211_PLINK_LISTEN;
sta->sta.wme = true;
sta->sta.aid = aid;
sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
return sta;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Pedersen | 84 | 69.42% | 2 | 40.00% |
Bob Copeland | 27 | 22.31% | 1 | 20.00% |
Johannes Berg | 10 | 8.26% | 2 | 40.00% |
Total | 121 | 100.00% | 5 | 100.00% |
static struct sta_info *
mesh_sta_info_alloc(struct ieee80211_sub_if_data *sdata, u8 *addr,
struct ieee802_11_elems *elems)
{
struct sta_info *sta = NULL;
/* Userspace handles station allocation */
if (sdata->u.mesh.user_mpm ||
sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED) {
if (mesh_peer_accepts_plinks(elems) &&
mesh_plink_availables(sdata))
cfg80211_notify_new_peer_candidate(sdata->dev, addr,
elems->ie_start,
elems->total_len,
GFP_KERNEL);
} else
sta = __mesh_sta_info_alloc(sdata, addr);
return sta;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Pedersen | 82 | 85.42% | 3 | 75.00% |
Masashi Honma | 14 | 14.58% | 1 | 25.00% |
Total | 96 | 100.00% | 4 | 100.00% |
/*
* mesh_sta_info_get - return mesh sta info entry for @addr.
*
* @sdata: local meshif
* @addr: peer's address
* @elems: IEs from beacon or mesh peering frame.
*
* Return existing or newly allocated sta_info under RCU read lock.
* (re)initialize with given IEs.
*/
static struct sta_info *
mesh_sta_info_get(struct ieee80211_sub_if_data *sdata,
u8 *addr, struct ieee802_11_elems *elems) __acquires(RCU)
{
struct sta_info *sta = NULL;
rcu_read_lock();
sta = sta_info_get(sdata, addr);
if (sta) {
mesh_sta_info_init(sdata, sta, elems, false);
} else {
rcu_read_unlock();
/* can't run atomic */
sta = mesh_sta_info_alloc(sdata, addr, elems);
if (!sta) {
rcu_read_lock();
return NULL;
}
mesh_sta_info_init(sdata, sta, elems, true);
if (sta_info_insert_rcu(sta))
return NULL;
}
return sta;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Pedersen | 117 | 100.00% | 4 | 100.00% |
Total | 117 | 100.00% | 4 | 100.00% |
/*
* mesh_neighbour_update - update or initialize new mesh neighbor.
*
* @sdata: local meshif
* @addr: peer's address
* @elems: IEs from beacon or mesh peering frame
*
* Initiates peering if appropriate.
*/
void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
u8 *hw_addr,
struct ieee802_11_elems *elems)
{
struct sta_info *sta;
u32 changed = 0;
sta = mesh_sta_info_get(sdata, hw_addr, elems);
if (!sta)
goto out;
if (mesh_peer_accepts_plinks(elems) &&
sta->mesh->plink_state == NL80211_PLINK_LISTEN &&
sdata->u.mesh.accepting_plinks &&
sdata->u.mesh.mshcfg.auto_open_plinks &&
rssi_threshold_check(sdata, sta))
changed = mesh_plink_open(sta);
ieee80211_mps_frame_release(sta, elems);
out:
rcu_read_unlock();
ieee80211_mbss_info_change_notify(sdata, changed);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Pedersen | 44 | 38.60% | 6 | 35.29% |
Luis Carlos Cobo Rus | 40 | 35.09% | 1 | 5.88% |
Johannes Berg | 11 | 9.65% | 4 | 23.53% |
Marco Porsch | 7 | 6.14% | 1 | 5.88% |
Ashok Nagarajan | 5 | 4.39% | 2 | 11.76% |
Javier Cardona | 5 | 4.39% | 2 | 11.76% |
Bob Copeland | 2 | 1.75% | 1 | 5.88% |
Total | 114 | 100.00% | 17 | 100.00% |
static void mesh_plink_timer(unsigned long data)
{
struct sta_info *sta;
u16 reason = 0;
struct ieee80211_sub_if_data *sdata;
struct mesh_config *mshcfg;
enum ieee80211_self_protected_actioncode action = 0;
/*
* This STA is valid because sta_info_destroy() will
* del_timer_sync() this timer after having made sure
* it cannot be readded (by deleting the plink.)
*/
sta = (struct sta_info *) data;
if (sta->sdata->local->quiescing)
return;
spin_lock_bh(&sta->mesh->plink_lock);
/* If a timer fires just before a state transition on another CPU,
* we may have already extended the timeout and changed state by the
* time we've acquired the lock and arrived here. In that case,
* skip this timer and wait for the new one.
*/
if (time_before(jiffies, sta->mesh->plink_timer.expires)) {
mpl_dbg(sta->sdata,
"Ignoring timer for %pM in state %s (timer adjusted)",
sta->sta.addr, mplstates[sta->mesh->plink_state]);
spin_unlock_bh(&sta->mesh->plink_lock);
return;
}
/* del_timer() and handler may race when entering these states */
if (sta->mesh->plink_state == NL80211_PLINK_LISTEN ||
sta->mesh->plink_state == NL80211_PLINK_ESTAB) {
mpl_dbg(sta->sdata,
"Ignoring timer for %pM in state %s (timer deleted)",
sta->sta.addr, mplstates[sta->mesh->plink_state]);
spin_unlock_bh(&sta->mesh->plink_lock);
return;
}
mpl_dbg(sta->sdata,
"Mesh plink timer for %pM fired on state %s\n",
sta->sta.addr, mplstates[sta->mesh->plink_state]);
sdata = sta->sdata;
mshcfg = &sdata->u.mesh.mshcfg;
switch (sta->mesh->plink_state) {
case NL80211_PLINK_OPN_RCVD:
case NL80211_PLINK_OPN_SNT:
/* retry timer */
if (sta->mesh->plink_retries < mshcfg->dot11MeshMaxRetries) {
u32 rand;
mpl_dbg(sta->sdata,
"Mesh plink for %pM (retry, timeout): %d %d\n",
sta->sta.addr, sta->mesh->plink_retries,
sta->mesh->plink_timeout);
get_random_bytes(&rand, sizeof(u32));
sta->mesh->plink_timeout = sta->mesh->plink_timeout +
rand % sta->mesh->plink_timeout;
++sta->mesh->plink_retries;
mod_plink_timer(sta, sta->mesh->plink_timeout);
action = WLAN_SP_MESH_PEERING_OPEN;
break;
}
reason = WLAN_REASON_MESH_MAX_RETRIES;
/* fall through on else */
case NL80211_PLINK_CNF_RCVD:
/* confirm timer */
if (!reason)
reason = WLAN_REASON_MESH_CONFIRM_TIMEOUT;
sta->mesh->plink_state = NL80211_PLINK_HOLDING;
mod_plink_timer(sta, mshcfg->dot11MeshHoldingTimeout);
action = WLAN_SP_MESH_PEERING_CLOSE;
break;
case NL80211_PLINK_HOLDING:
/* holding timer */
del_timer(&sta->mesh->plink_timer);
mesh_plink_fsm_restart(sta);
break;
default:
break;
}
spin_unlock_bh(&sta->mesh->plink_lock);
if (action)
mesh_plink_frame_tx(sdata, sta, action, sta->sta.addr,
sta->mesh->llid, sta->mesh->plid, reason);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Luis Carlos Cobo Rus | 208 | 47.60% | 1 | 5.88% |
Bob Copeland | 83 | 18.99% | 4 | 23.53% |
Johannes Berg | 73 | 16.70% | 6 | 35.29% |
Thomas Pedersen | 41 | 9.38% | 3 | 17.65% |
Marco Porsch | 20 | 4.58% | 1 | 5.88% |
Chun-Yeow Yeoh | 7 | 1.60% | 1 | 5.88% |
Javier Cardona | 5 | 1.14% | 1 | 5.88% |
Total | 437 | 100.00% | 17 | 100.00% |
static inline void mesh_plink_timer_set(struct sta_info *sta, u32 timeout)
{
sta->mesh->plink_timer.expires = jiffies