2019-06-04 10:11:33 +02:00
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// SPDX-License-Identifier: GPL-2.0-only
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2013-01-30 18:14:08 +01:00
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/*
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* Copyright 2012-2013, Marco Porsch <marco.porsch@s2005.tu-chemnitz.de>
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* Copyright 2012-2013, cozybit Inc.
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*/
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#include "mesh.h"
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#include "wme.h"
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/* mesh PS management */
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/**
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* mps_qos_null_get - create pre-addressed QoS Null frame for mesh powersave
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*/
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static struct sk_buff *mps_qos_null_get(struct sta_info *sta)
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{
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struct ieee80211_sub_if_data *sdata = sta->sdata;
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_hdr *nullfunc; /* use 4addr header */
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struct sk_buff *skb;
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int size = sizeof(*nullfunc);
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__le16 fc;
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skb = dev_alloc_skb(local->hw.extra_tx_headroom + size + 2);
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if (!skb)
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return NULL;
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skb_reserve(skb, local->hw.extra_tx_headroom);
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networking: make skb_put & friends return void pointers
It seems like a historic accident that these return unsigned char *,
and in many places that means casts are required, more often than not.
Make these functions (skb_put, __skb_put and pskb_put) return void *
and remove all the casts across the tree, adding a (u8 *) cast only
where the unsigned char pointer was used directly, all done with the
following spatch:
@@
expression SKB, LEN;
typedef u8;
identifier fn = { skb_put, __skb_put };
@@
- *(fn(SKB, LEN))
+ *(u8 *)fn(SKB, LEN)
@@
expression E, SKB, LEN;
identifier fn = { skb_put, __skb_put };
type T;
@@
- E = ((T *)(fn(SKB, LEN)))
+ E = fn(SKB, LEN)
which actually doesn't cover pskb_put since there are only three
users overall.
A handful of stragglers were converted manually, notably a macro in
drivers/isdn/i4l/isdn_bsdcomp.c and, oddly enough, one of the many
instances in net/bluetooth/hci_sock.c. In the former file, I also
had to fix one whitespace problem spatch introduced.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-16 14:29:21 +02:00
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nullfunc = skb_put(skb, size);
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2013-01-30 18:14:08 +01:00
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fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_NULLFUNC);
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ieee80211_fill_mesh_addresses(nullfunc, &fc, sta->sta.addr,
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sdata->vif.addr);
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nullfunc->frame_control = fc;
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nullfunc->duration_id = 0;
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2014-03-04 13:46:53 +01:00
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nullfunc->seq_ctrl = 0;
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2013-01-30 18:14:08 +01:00
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/* no address resolution for this frame -> set addr 1 immediately */
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memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
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networking: convert many more places to skb_put_zero()
There were many places that my previous spatch didn't find,
as pointed out by yuan linyu in various patches.
The following spatch found many more and also removes the
now unnecessary casts:
@@
identifier p, p2;
expression len;
expression skb;
type t, t2;
@@
(
-p = skb_put(skb, len);
+p = skb_put_zero(skb, len);
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-p = (t)skb_put(skb, len);
+p = skb_put_zero(skb, len);
)
... when != p
(
p2 = (t2)p;
-memset(p2, 0, len);
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-memset(p, 0, len);
)
@@
type t, t2;
identifier p, p2;
expression skb;
@@
t *p;
...
(
-p = skb_put(skb, sizeof(t));
+p = skb_put_zero(skb, sizeof(t));
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-p = (t *)skb_put(skb, sizeof(t));
+p = skb_put_zero(skb, sizeof(t));
)
... when != p
(
p2 = (t2)p;
-memset(p2, 0, sizeof(*p));
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-memset(p, 0, sizeof(*p));
)
@@
expression skb, len;
@@
-memset(skb_put(skb, len), 0, len);
+skb_put_zero(skb, len);
Apply it to the tree (with one manual fixup to keep the
comment in vxlan.c, which spatch removed.)
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-16 14:29:19 +02:00
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skb_put_zero(skb, 2); /* append QoS control field */
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2013-01-30 18:14:08 +01:00
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ieee80211_mps_set_frame_flags(sdata, sta, nullfunc);
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return skb;
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}
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/**
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* mps_qos_null_tx - send a QoS Null to indicate link-specific power mode
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*/
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static void mps_qos_null_tx(struct sta_info *sta)
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{
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struct sk_buff *skb;
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skb = mps_qos_null_get(sta);
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if (!skb)
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return;
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mps_dbg(sta->sdata, "announcing peer-specific power mode to %pM\n",
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sta->sta.addr);
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/* don't unintentionally start a MPSP */
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if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
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u8 *qc = ieee80211_get_qos_ctl((void *) skb->data);
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qc[0] |= IEEE80211_QOS_CTL_EOSP;
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}
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ieee80211_tx_skb(sta->sdata, skb);
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}
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/**
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* ieee80211_mps_local_status_update - track status of local link-specific PMs
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*
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* @sdata: local mesh subif
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*
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* sets the non-peer power mode and triggers the driver PS (re-)configuration
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2013-02-13 21:14:19 +01:00
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* Return BSS_CHANGED_BEACON if a beacon update is necessary.
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2013-01-30 18:14:08 +01:00
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*/
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2013-02-13 21:14:19 +01:00
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u32 ieee80211_mps_local_status_update(struct ieee80211_sub_if_data *sdata)
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2013-01-30 18:14:08 +01:00
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{
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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struct sta_info *sta;
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bool peering = false;
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int light_sleep_cnt = 0;
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int deep_sleep_cnt = 0;
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2013-02-13 21:14:19 +01:00
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u32 changed = 0;
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enum nl80211_mesh_power_mode nonpeer_pm;
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2013-01-30 18:14:08 +01:00
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rcu_read_lock();
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list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
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if (sdata != sta->sdata)
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continue;
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2015-06-17 10:31:00 +02:00
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switch (sta->mesh->plink_state) {
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2013-01-30 18:14:08 +01:00
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case NL80211_PLINK_OPN_SNT:
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case NL80211_PLINK_OPN_RCVD:
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case NL80211_PLINK_CNF_RCVD:
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peering = true;
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break;
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case NL80211_PLINK_ESTAB:
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2015-06-17 10:31:00 +02:00
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if (sta->mesh->local_pm == NL80211_MESH_POWER_LIGHT_SLEEP)
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2013-01-30 18:14:08 +01:00
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light_sleep_cnt++;
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2015-06-17 10:31:00 +02:00
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else if (sta->mesh->local_pm == NL80211_MESH_POWER_DEEP_SLEEP)
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2013-01-30 18:14:08 +01:00
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deep_sleep_cnt++;
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break;
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default:
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break;
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}
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}
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rcu_read_unlock();
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/*
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* Set non-peer mode to active during peering/scanning/authentication
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* (see IEEE802.11-2012 13.14.8.3). The non-peer mesh power mode is
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* deep sleep if the local STA is in light or deep sleep towards at
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* least one mesh peer (see 13.14.3.1). Otherwise, set it to the
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* user-configured default value.
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*/
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if (peering) {
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mps_dbg(sdata, "setting non-peer PM to active for peering\n");
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2013-02-13 21:14:19 +01:00
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nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
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2013-01-30 18:14:08 +01:00
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} else if (light_sleep_cnt || deep_sleep_cnt) {
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mps_dbg(sdata, "setting non-peer PM to deep sleep\n");
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2013-02-13 21:14:19 +01:00
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nonpeer_pm = NL80211_MESH_POWER_DEEP_SLEEP;
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2013-01-30 18:14:08 +01:00
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} else {
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mps_dbg(sdata, "setting non-peer PM to user value\n");
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2013-02-13 21:14:19 +01:00
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nonpeer_pm = ifmsh->mshcfg.power_mode;
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2013-01-30 18:14:08 +01:00
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}
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2013-02-13 21:14:19 +01:00
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/* need update if sleep counts move between 0 and non-zero */
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if (ifmsh->nonpeer_pm != nonpeer_pm ||
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!ifmsh->ps_peers_light_sleep != !light_sleep_cnt ||
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!ifmsh->ps_peers_deep_sleep != !deep_sleep_cnt)
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changed = BSS_CHANGED_BEACON;
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ifmsh->nonpeer_pm = nonpeer_pm;
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2013-01-30 18:14:08 +01:00
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ifmsh->ps_peers_light_sleep = light_sleep_cnt;
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ifmsh->ps_peers_deep_sleep = deep_sleep_cnt;
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2013-02-13 21:14:19 +01:00
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return changed;
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2013-01-30 18:14:08 +01:00
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}
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/**
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* ieee80211_mps_set_sta_local_pm - set local PM towards a mesh STA
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*
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* @sta: mesh STA
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* @pm: the power mode to set
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2013-02-13 21:14:19 +01:00
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* Return BSS_CHANGED_BEACON if a beacon update is in order.
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2013-01-30 18:14:08 +01:00
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*/
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2013-02-13 21:14:19 +01:00
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u32 ieee80211_mps_set_sta_local_pm(struct sta_info *sta,
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enum nl80211_mesh_power_mode pm)
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2013-01-30 18:14:08 +01:00
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{
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struct ieee80211_sub_if_data *sdata = sta->sdata;
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2015-06-17 10:31:00 +02:00
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if (sta->mesh->local_pm == pm)
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2013-10-15 12:29:24 +02:00
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return 0;
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2013-01-30 18:14:08 +01:00
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mps_dbg(sdata, "local STA operates in mode %d with %pM\n",
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pm, sta->sta.addr);
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2015-06-17 10:31:00 +02:00
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sta->mesh->local_pm = pm;
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2013-01-30 18:14:08 +01:00
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/*
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* announce peer-specific power mode transition
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* (see IEEE802.11-2012 13.14.3.2 and 13.14.3.3)
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*/
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2015-06-17 10:31:00 +02:00
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if (sta->mesh->plink_state == NL80211_PLINK_ESTAB)
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2013-01-30 18:14:08 +01:00
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mps_qos_null_tx(sta);
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2013-02-13 21:14:19 +01:00
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return ieee80211_mps_local_status_update(sdata);
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2013-01-30 18:14:08 +01:00
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}
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/**
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* ieee80211_mps_set_frame_flags - set mesh PS flags in FC (and QoS Control)
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*
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* @sdata: local mesh subif
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* @sta: mesh STA
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* @hdr: 802.11 frame header
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*
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* see IEEE802.11-2012 8.2.4.1.7 and 8.2.4.5.11
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*
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* NOTE: sta must be given when an individually-addressed QoS frame header
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* is handled, for group-addressed and management frames it is not used
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*/
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void ieee80211_mps_set_frame_flags(struct ieee80211_sub_if_data *sdata,
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struct sta_info *sta,
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struct ieee80211_hdr *hdr)
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{
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enum nl80211_mesh_power_mode pm;
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u8 *qc;
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if (WARN_ON(is_unicast_ether_addr(hdr->addr1) &&
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ieee80211_is_data_qos(hdr->frame_control) &&
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!sta))
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return;
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if (is_unicast_ether_addr(hdr->addr1) &&
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ieee80211_is_data_qos(hdr->frame_control) &&
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2015-06-17 10:31:00 +02:00
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sta->mesh->plink_state == NL80211_PLINK_ESTAB)
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pm = sta->mesh->local_pm;
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2013-01-30 18:14:08 +01:00
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else
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pm = sdata->u.mesh.nonpeer_pm;
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if (pm == NL80211_MESH_POWER_ACTIVE)
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hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_PM);
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else
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hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
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if (!ieee80211_is_data_qos(hdr->frame_control))
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return;
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qc = ieee80211_get_qos_ctl(hdr);
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if ((is_unicast_ether_addr(hdr->addr1) &&
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pm == NL80211_MESH_POWER_DEEP_SLEEP) ||
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(is_multicast_ether_addr(hdr->addr1) &&
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sdata->u.mesh.ps_peers_deep_sleep > 0))
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qc[1] |= (IEEE80211_QOS_CTL_MESH_PS_LEVEL >> 8);
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else
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qc[1] &= ~(IEEE80211_QOS_CTL_MESH_PS_LEVEL >> 8);
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}
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/**
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* ieee80211_mps_sta_status_update - update buffering status of neighbor STA
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*
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* @sta: mesh STA
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*
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* called after change of peering status or non-peer/peer-specific power mode
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*/
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void ieee80211_mps_sta_status_update(struct sta_info *sta)
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{
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enum nl80211_mesh_power_mode pm;
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bool do_buffer;
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2013-07-19 11:37:39 +02:00
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/* For non-assoc STA, prevent buffering or frame transmission */
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if (sta->sta_state < IEEE80211_STA_ASSOC)
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return;
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2013-01-30 18:14:08 +01:00
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/*
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* use peer-specific power mode if peering is established and the
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* peer's power mode is known
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*/
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2015-06-17 10:31:00 +02:00
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if (sta->mesh->plink_state == NL80211_PLINK_ESTAB &&
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sta->mesh->peer_pm != NL80211_MESH_POWER_UNKNOWN)
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pm = sta->mesh->peer_pm;
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2013-01-30 18:14:08 +01:00
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else
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2015-06-17 10:31:00 +02:00
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pm = sta->mesh->nonpeer_pm;
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2013-01-30 18:14:08 +01:00
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do_buffer = (pm != NL80211_MESH_POWER_ACTIVE);
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2013-10-15 12:29:24 +02:00
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/* clear the MPSP flags for non-peers or active STA */
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2015-06-17 10:31:00 +02:00
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if (sta->mesh->plink_state != NL80211_PLINK_ESTAB) {
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2013-10-15 12:29:24 +02:00
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clear_sta_flag(sta, WLAN_STA_MPSP_OWNER);
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clear_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT);
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} else if (!do_buffer) {
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clear_sta_flag(sta, WLAN_STA_MPSP_OWNER);
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}
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2013-01-30 18:14:08 +01:00
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/* Don't let the same PS state be set twice */
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if (test_sta_flag(sta, WLAN_STA_PS_STA) == do_buffer)
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return;
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if (do_buffer) {
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set_sta_flag(sta, WLAN_STA_PS_STA);
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atomic_inc(&sta->sdata->u.mesh.ps.num_sta_ps);
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mps_dbg(sta->sdata, "start PS buffering frames towards %pM\n",
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sta->sta.addr);
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} else {
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ieee80211_sta_ps_deliver_wakeup(sta);
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}
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}
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static void mps_set_sta_peer_pm(struct sta_info *sta,
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struct ieee80211_hdr *hdr)
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{
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enum nl80211_mesh_power_mode pm;
|
|
|
|
u8 *qc = ieee80211_get_qos_ctl(hdr);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Test Power Management field of frame control (PW) and
|
|
|
|
* mesh power save level subfield of QoS control field (PSL)
|
|
|
|
*
|
|
|
|
* | PM | PSL| Mesh PM |
|
|
|
|
* +----+----+---------+
|
|
|
|
* | 0 |Rsrv| Active |
|
|
|
|
* | 1 | 0 | Light |
|
|
|
|
* | 1 | 1 | Deep |
|
|
|
|
*/
|
|
|
|
if (ieee80211_has_pm(hdr->frame_control)) {
|
|
|
|
if (qc[1] & (IEEE80211_QOS_CTL_MESH_PS_LEVEL >> 8))
|
|
|
|
pm = NL80211_MESH_POWER_DEEP_SLEEP;
|
|
|
|
else
|
|
|
|
pm = NL80211_MESH_POWER_LIGHT_SLEEP;
|
|
|
|
} else {
|
|
|
|
pm = NL80211_MESH_POWER_ACTIVE;
|
|
|
|
}
|
|
|
|
|
2015-06-17 10:31:00 +02:00
|
|
|
if (sta->mesh->peer_pm == pm)
|
2013-01-30 18:14:08 +01:00
|
|
|
return;
|
|
|
|
|
|
|
|
mps_dbg(sta->sdata, "STA %pM enters mode %d\n",
|
|
|
|
sta->sta.addr, pm);
|
|
|
|
|
2015-06-17 10:31:00 +02:00
|
|
|
sta->mesh->peer_pm = pm;
|
2013-01-30 18:14:08 +01:00
|
|
|
|
|
|
|
ieee80211_mps_sta_status_update(sta);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void mps_set_sta_nonpeer_pm(struct sta_info *sta,
|
|
|
|
struct ieee80211_hdr *hdr)
|
|
|
|
{
|
|
|
|
enum nl80211_mesh_power_mode pm;
|
|
|
|
|
|
|
|
if (ieee80211_has_pm(hdr->frame_control))
|
|
|
|
pm = NL80211_MESH_POWER_DEEP_SLEEP;
|
|
|
|
else
|
|
|
|
pm = NL80211_MESH_POWER_ACTIVE;
|
|
|
|
|
2015-06-17 10:31:00 +02:00
|
|
|
if (sta->mesh->nonpeer_pm == pm)
|
2013-01-30 18:14:08 +01:00
|
|
|
return;
|
|
|
|
|
|
|
|
mps_dbg(sta->sdata, "STA %pM sets non-peer mode to %d\n",
|
|
|
|
sta->sta.addr, pm);
|
|
|
|
|
2015-06-17 10:31:00 +02:00
|
|
|
sta->mesh->nonpeer_pm = pm;
|
2013-01-30 18:14:08 +01:00
|
|
|
|
|
|
|
ieee80211_mps_sta_status_update(sta);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ieee80211_mps_rx_h_sta_process - frame receive handler for mesh powersave
|
|
|
|
*
|
|
|
|
* @sta: STA info that transmitted the frame
|
|
|
|
* @hdr: IEEE 802.11 (QoS) Header
|
|
|
|
*/
|
|
|
|
void ieee80211_mps_rx_h_sta_process(struct sta_info *sta,
|
|
|
|
struct ieee80211_hdr *hdr)
|
|
|
|
{
|
|
|
|
if (is_unicast_ether_addr(hdr->addr1) &&
|
|
|
|
ieee80211_is_data_qos(hdr->frame_control)) {
|
|
|
|
/*
|
|
|
|
* individually addressed QoS Data/Null frames contain
|
|
|
|
* peer link-specific PS mode towards the local STA
|
|
|
|
*/
|
|
|
|
mps_set_sta_peer_pm(sta, hdr);
|
|
|
|
|
|
|
|
/* check for mesh Peer Service Period trigger frames */
|
|
|
|
ieee80211_mpsp_trigger_process(ieee80211_get_qos_ctl(hdr),
|
|
|
|
sta, false, false);
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* can only determine non-peer PS mode
|
|
|
|
* (see IEEE802.11-2012 8.2.4.1.7)
|
|
|
|
*/
|
|
|
|
mps_set_sta_nonpeer_pm(sta, hdr);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* mesh PS frame release */
|
|
|
|
|
|
|
|
static void mpsp_trigger_send(struct sta_info *sta, bool rspi, bool eosp)
|
|
|
|
{
|
|
|
|
struct ieee80211_sub_if_data *sdata = sta->sdata;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
struct ieee80211_hdr *nullfunc;
|
|
|
|
struct ieee80211_tx_info *info;
|
|
|
|
u8 *qc;
|
|
|
|
|
|
|
|
skb = mps_qos_null_get(sta);
|
|
|
|
if (!skb)
|
|
|
|
return;
|
|
|
|
|
|
|
|
nullfunc = (struct ieee80211_hdr *) skb->data;
|
|
|
|
if (!eosp)
|
|
|
|
nullfunc->frame_control |=
|
|
|
|
cpu_to_le16(IEEE80211_FCTL_MOREDATA);
|
|
|
|
/*
|
|
|
|
* | RSPI | EOSP | MPSP triggering |
|
|
|
|
* +------+------+--------------------+
|
|
|
|
* | 0 | 0 | local STA is owner |
|
|
|
|
* | 0 | 1 | no MPSP (MPSP end) |
|
|
|
|
* | 1 | 0 | both STA are owner |
|
|
|
|
* | 1 | 1 | peer STA is owner | see IEEE802.11-2012 13.14.9.2
|
|
|
|
*/
|
|
|
|
qc = ieee80211_get_qos_ctl(nullfunc);
|
|
|
|
if (rspi)
|
|
|
|
qc[1] |= (IEEE80211_QOS_CTL_RSPI >> 8);
|
|
|
|
if (eosp)
|
|
|
|
qc[0] |= IEEE80211_QOS_CTL_EOSP;
|
|
|
|
|
|
|
|
info = IEEE80211_SKB_CB(skb);
|
|
|
|
|
|
|
|
info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
|
|
|
|
IEEE80211_TX_CTL_REQ_TX_STATUS;
|
|
|
|
|
|
|
|
mps_dbg(sdata, "sending MPSP trigger%s%s to %pM\n",
|
|
|
|
rspi ? " RSPI" : "", eosp ? " EOSP" : "", sta->sta.addr);
|
|
|
|
|
|
|
|
ieee80211_tx_skb(sdata, skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* mpsp_qos_null_append - append QoS Null frame to MPSP skb queue if needed
|
|
|
|
*
|
|
|
|
* To properly end a mesh MPSP the last transmitted frame has to set the EOSP
|
|
|
|
* flag in the QoS Control field. In case the current tailing frame is not a
|
|
|
|
* QoS Data frame, append a QoS Null to carry the flag.
|
|
|
|
*/
|
|
|
|
static void mpsp_qos_null_append(struct sta_info *sta,
|
|
|
|
struct sk_buff_head *frames)
|
|
|
|
{
|
|
|
|
struct ieee80211_sub_if_data *sdata = sta->sdata;
|
|
|
|
struct sk_buff *new_skb, *skb = skb_peek_tail(frames);
|
|
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
|
|
|
|
struct ieee80211_tx_info *info;
|
|
|
|
|
|
|
|
if (ieee80211_is_data_qos(hdr->frame_control))
|
|
|
|
return;
|
|
|
|
|
|
|
|
new_skb = mps_qos_null_get(sta);
|
|
|
|
if (!new_skb)
|
|
|
|
return;
|
|
|
|
|
|
|
|
mps_dbg(sdata, "appending QoS Null in MPSP towards %pM\n",
|
|
|
|
sta->sta.addr);
|
|
|
|
/*
|
|
|
|
* This frame has to be transmitted last. Assign lowest priority to
|
|
|
|
* make sure it cannot pass other frames when releasing multiple ACs.
|
|
|
|
*/
|
|
|
|
new_skb->priority = 1;
|
|
|
|
skb_set_queue_mapping(new_skb, IEEE80211_AC_BK);
|
|
|
|
ieee80211_set_qos_hdr(sdata, new_skb);
|
|
|
|
|
|
|
|
info = IEEE80211_SKB_CB(new_skb);
|
|
|
|
info->control.vif = &sdata->vif;
|
|
|
|
info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
|
|
|
|
|
|
|
|
__skb_queue_tail(frames, new_skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* mps_frame_deliver - transmit frames during mesh powersave
|
|
|
|
*
|
|
|
|
* @sta: STA info to transmit to
|
|
|
|
* @n_frames: number of frames to transmit. -1 for all
|
|
|
|
*/
|
|
|
|
static void mps_frame_deliver(struct sta_info *sta, int n_frames)
|
|
|
|
{
|
2013-10-15 12:29:24 +02:00
|
|
|
struct ieee80211_local *local = sta->sdata->local;
|
2013-01-30 18:14:08 +01:00
|
|
|
int ac;
|
|
|
|
struct sk_buff_head frames;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
bool more_data = false;
|
|
|
|
|
|
|
|
skb_queue_head_init(&frames);
|
|
|
|
|
|
|
|
/* collect frame(s) from buffers */
|
|
|
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
|
|
|
|
while (n_frames != 0) {
|
|
|
|
skb = skb_dequeue(&sta->tx_filtered[ac]);
|
|
|
|
if (!skb) {
|
|
|
|
skb = skb_dequeue(
|
|
|
|
&sta->ps_tx_buf[ac]);
|
|
|
|
if (skb)
|
|
|
|
local->total_ps_buffered--;
|
|
|
|
}
|
|
|
|
if (!skb)
|
|
|
|
break;
|
|
|
|
n_frames--;
|
|
|
|
__skb_queue_tail(&frames, skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
|
|
|
|
!skb_queue_empty(&sta->ps_tx_buf[ac]))
|
|
|
|
more_data = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* nothing to send? -> EOSP */
|
|
|
|
if (skb_queue_empty(&frames)) {
|
|
|
|
mpsp_trigger_send(sta, false, true);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* in a MPSP make sure the last skb is a QoS Data frame */
|
|
|
|
if (test_sta_flag(sta, WLAN_STA_MPSP_OWNER))
|
|
|
|
mpsp_qos_null_append(sta, &frames);
|
|
|
|
|
|
|
|
mps_dbg(sta->sdata, "sending %d frames to PS STA %pM\n",
|
|
|
|
skb_queue_len(&frames), sta->sta.addr);
|
|
|
|
|
|
|
|
/* prepare collected frames for transmission */
|
|
|
|
skb_queue_walk(&frames, skb) {
|
|
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
|
|
|
struct ieee80211_hdr *hdr = (void *) skb->data;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Tell TX path to send this frame even though the
|
|
|
|
* STA may still remain is PS mode after this frame
|
|
|
|
* exchange.
|
|
|
|
*/
|
|
|
|
info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
|
|
|
|
|
|
|
|
if (more_data || !skb_queue_is_last(&frames, skb))
|
|
|
|
hdr->frame_control |=
|
|
|
|
cpu_to_le16(IEEE80211_FCTL_MOREDATA);
|
|
|
|
else
|
|
|
|
hdr->frame_control &=
|
|
|
|
cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
|
|
|
|
|
|
|
|
if (skb_queue_is_last(&frames, skb) &&
|
|
|
|
ieee80211_is_data_qos(hdr->frame_control)) {
|
|
|
|
u8 *qoshdr = ieee80211_get_qos_ctl(hdr);
|
|
|
|
|
|
|
|
/* MPSP trigger frame ends service period */
|
|
|
|
*qoshdr |= IEEE80211_QOS_CTL_EOSP;
|
|
|
|
info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
ieee80211_add_pending_skbs(local, &frames);
|
|
|
|
sta_info_recalc_tim(sta);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ieee80211_mpsp_trigger_process - track status of mesh Peer Service Periods
|
|
|
|
*
|
|
|
|
* @qc: QoS Control field
|
|
|
|
* @sta: peer to start a MPSP with
|
|
|
|
* @tx: frame was transmitted by the local STA
|
|
|
|
* @acked: frame has been transmitted successfully
|
|
|
|
*
|
|
|
|
* NOTE: active mode STA may only serve as MPSP owner
|
|
|
|
*/
|
|
|
|
void ieee80211_mpsp_trigger_process(u8 *qc, struct sta_info *sta,
|
|
|
|
bool tx, bool acked)
|
|
|
|
{
|
|
|
|
u8 rspi = qc[1] & (IEEE80211_QOS_CTL_RSPI >> 8);
|
|
|
|
u8 eosp = qc[0] & IEEE80211_QOS_CTL_EOSP;
|
|
|
|
|
|
|
|
if (tx) {
|
|
|
|
if (rspi && acked)
|
|
|
|
set_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT);
|
|
|
|
|
|
|
|
if (eosp)
|
|
|
|
clear_sta_flag(sta, WLAN_STA_MPSP_OWNER);
|
|
|
|
else if (acked &&
|
|
|
|
test_sta_flag(sta, WLAN_STA_PS_STA) &&
|
|
|
|
!test_and_set_sta_flag(sta, WLAN_STA_MPSP_OWNER))
|
|
|
|
mps_frame_deliver(sta, -1);
|
|
|
|
} else {
|
|
|
|
if (eosp)
|
|
|
|
clear_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT);
|
2015-06-17 10:31:00 +02:00
|
|
|
else if (sta->mesh->local_pm != NL80211_MESH_POWER_ACTIVE)
|
2013-01-30 18:14:08 +01:00
|
|
|
set_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT);
|
|
|
|
|
|
|
|
if (rspi && !test_and_set_sta_flag(sta, WLAN_STA_MPSP_OWNER))
|
|
|
|
mps_frame_deliver(sta, -1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2013-10-15 12:29:24 +02:00
|
|
|
* ieee80211_mps_frame_release - release frames buffered due to mesh power save
|
2013-01-30 18:14:08 +01:00
|
|
|
*
|
|
|
|
* @sta: mesh STA
|
2013-10-15 12:29:24 +02:00
|
|
|
* @elems: IEs of beacon or probe response
|
2013-01-30 18:14:08 +01:00
|
|
|
*
|
|
|
|
* For peers if we have individually-addressed frames buffered or the peer
|
|
|
|
* indicates buffered frames, send a corresponding MPSP trigger frame. Since
|
|
|
|
* we do not evaluate the awake window duration, QoS Nulls are used as MPSP
|
|
|
|
* trigger frames. If the neighbour STA is not a peer, only send single frames.
|
|
|
|
*/
|
|
|
|
void ieee80211_mps_frame_release(struct sta_info *sta,
|
|
|
|
struct ieee802_11_elems *elems)
|
|
|
|
{
|
|
|
|
int ac, buffer_local = 0;
|
|
|
|
bool has_buffered = false;
|
|
|
|
|
2015-06-17 10:31:00 +02:00
|
|
|
if (sta->mesh->plink_state == NL80211_PLINK_ESTAB)
|
2013-01-30 18:14:08 +01:00
|
|
|
has_buffered = ieee80211_check_tim(elems->tim, elems->tim_len,
|
2015-07-14 14:31:58 +02:00
|
|
|
sta->mesh->aid);
|
2013-01-30 18:14:08 +01:00
|
|
|
|
|
|
|
if (has_buffered)
|
|
|
|
mps_dbg(sta->sdata, "%pM indicates buffered frames\n",
|
|
|
|
sta->sta.addr);
|
|
|
|
|
|
|
|
/* only transmit to PS STA with announced, non-zero awake window */
|
|
|
|
if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
|
|
|
|
(!elems->awake_window || !le16_to_cpu(*elems->awake_window)))
|
|
|
|
return;
|
|
|
|
|
2013-10-15 12:29:24 +02:00
|
|
|
if (!test_sta_flag(sta, WLAN_STA_MPSP_OWNER))
|
|
|
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
|
|
|
|
buffer_local += skb_queue_len(&sta->ps_tx_buf[ac]) +
|
|
|
|
skb_queue_len(&sta->tx_filtered[ac]);
|
2013-01-30 18:14:08 +01:00
|
|
|
|
|
|
|
if (!has_buffered && !buffer_local)
|
|
|
|
return;
|
|
|
|
|
2015-06-17 10:31:00 +02:00
|
|
|
if (sta->mesh->plink_state == NL80211_PLINK_ESTAB)
|
2013-01-30 18:14:08 +01:00
|
|
|
mpsp_trigger_send(sta, has_buffered, !buffer_local);
|
|
|
|
else
|
|
|
|
mps_frame_deliver(sta, 1);
|
|
|
|
}
|