Release 4.11 net/mac80211/tx.c
/*
* Copyright 2002-2005, Instant802 Networks, Inc.
* Copyright 2005-2006, Devicescape Software, Inc.
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
* Copyright 2013-2014 Intel Mobile Communications GmbH
*
* 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.
*
*
* Transmit and frame generation functions.
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/if_vlan.h>
#include <linux/etherdevice.h>
#include <linux/bitmap.h>
#include <linux/rcupdate.h>
#include <linux/export.h>
#include <net/net_namespace.h>
#include <net/ieee80211_radiotap.h>
#include <net/cfg80211.h>
#include <net/mac80211.h>
#include <net/codel.h>
#include <net/codel_impl.h>
#include <asm/unaligned.h>
#include <net/fq_impl.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
#include "led.h"
#include "mesh.h"
#include "wep.h"
#include "wpa.h"
#include "wme.h"
#include "rate.h"
/* misc utils */
static inline void ieee80211_tx_stats(struct net_device *dev, u32 len)
{
struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
u64_stats_update_begin(&tstats->syncp);
tstats->tx_packets++;
tstats->tx_bytes += len;
u64_stats_update_end(&tstats->syncp);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 54 | 100.00% | 1 | 100.00% |
Total | 54 | 100.00% | 1 | 100.00% |
static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
struct sk_buff *skb, int group_addr,
int next_frag_len)
{
int rate, mrate, erp, dur, i, shift = 0;
struct ieee80211_rate *txrate;
struct ieee80211_local *local = tx->local;
struct ieee80211_supported_band *sband;
struct ieee80211_hdr *hdr;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_chanctx_conf *chanctx_conf;
u32 rate_flags = 0;
/* assume HW handles this */
if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
return 0;
rcu_read_lock();
chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
if (chanctx_conf) {
shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
}
rcu_read_unlock();
/* uh huh? */
if (WARN_ON_ONCE(tx->rate.idx < 0))
return 0;
sband = local->hw.wiphy->bands[info->band];
txrate = &sband->bitrates[tx->rate.idx];
erp = txrate->flags & IEEE80211_RATE_ERP_G;
/*
* data and mgmt (except PS Poll):
* - during CFP: 32768
* - during contention period:
* if addr1 is group address: 0
* if more fragments = 0 and addr1 is individual address: time to
* transmit one ACK plus SIFS
* if more fragments = 1 and addr1 is individual address: time to
* transmit next fragment plus 2 x ACK plus 3 x SIFS
*
* IEEE 802.11, 9.6:
* - control response frame (CTS or ACK) shall be transmitted using the
* same rate as the immediately previous frame in the frame exchange
* sequence, if this rate belongs to the PHY mandatory rates, or else
* at the highest possible rate belonging to the PHY rates in the
* BSSBasicRateSet
*/
hdr = (struct ieee80211_hdr *)skb->data;
if (ieee80211_is_ctl(hdr->frame_control)) {
/* TODO: These control frames are not currently sent by
* mac80211, but should they be implemented, this function
* needs to be updated to support duration field calculation.
*
* RTS: time needed to transmit pending data/mgmt frame plus
* one CTS frame plus one ACK frame plus 3 x SIFS
* CTS: duration of immediately previous RTS minus time
* required to transmit CTS and its SIFS
* ACK: 0 if immediately previous directed data/mgmt had
* more=0, with more=1 duration in ACK frame is duration
* from previous frame minus time needed to transmit ACK
* and its SIFS
* PS Poll: BIT(15) | BIT(14) | aid
*/
return 0;
}
/* data/mgmt */
if (0 /* FIX: data/mgmt during CFP */)
return cpu_to_le16(32768);
if (group_addr) /* Group address as the destination - no ACK */
return 0;
/* Individual destination address:
* IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
* CTS and ACK frames shall be transmitted using the highest rate in
* basic rate set that is less than or equal to the rate of the
* immediately previous frame and that is using the same modulation
* (CCK or OFDM). If no basic rate set matches with these requirements,
* the highest mandatory rate of the PHY that is less than or equal to
* the rate of the previous frame is used.
* Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
*/
rate = -1;
/* use lowest available if everything fails */
mrate = sband->bitrates[0].bitrate;
for (i = 0; i < sband->n_bitrates; i++) {
struct ieee80211_rate *r = &sband->bitrates[i];
if (r->bitrate > txrate->bitrate)
break;
if ((rate_flags & r->flags) != rate_flags)
continue;
if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
switch (sband->band) {
case NL80211_BAND_2GHZ: {
u32 flag;
if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
flag = IEEE80211_RATE_MANDATORY_G;
else
flag = IEEE80211_RATE_MANDATORY_B;
if (r->flags & flag)
mrate = r->bitrate;
break;
}
case NL80211_BAND_5GHZ:
if (r->flags & IEEE80211_RATE_MANDATORY_A)
mrate = r->bitrate;
break;
case NL80211_BAND_60GHZ:
/* TODO, for now fall through */
case NUM_NL80211_BANDS:
WARN_ON(1);
break;
}
}
if (rate == -1) {
/* No matching basic rate found; use highest suitable mandatory
* PHY rate */
rate = DIV_ROUND_UP(mrate, 1 << shift);
}
/* Don't calculate ACKs for QoS Frames with NoAck Policy set */
if (ieee80211_is_data_qos(hdr->frame_control) &&
*(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
dur = 0;
else
/* Time needed to transmit ACK
* (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
* to closest integer */
dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
tx->sdata->vif.bss_conf.use_short_preamble,
shift);
if (next_frag_len) {
/* Frame is fragmented: duration increases with time needed to
* transmit next fragment plus ACK and 2 x SIFS. */
dur *= 2; /* ACK + SIFS */
/* next fragment */
dur += ieee80211_frame_duration(sband->band, next_frag_len,
txrate->bitrate, erp,
tx->sdata->vif.bss_conf.use_short_preamble,
shift);
}
return cpu_to_le16(dur);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 372 | 67.64% | 13 | 56.52% |
Simon Wunderlich | 117 | 21.27% | 3 | 13.04% |
Harvey Harrison | 23 | 4.18% | 1 | 4.35% |
Felix Fietkau | 22 | 4.00% | 2 | 8.70% |
Michal Kazior | 6 | 1.09% | 1 | 4.35% |
Daniel Drake | 6 | 1.09% | 1 | 4.35% |
Vladimir Kondratiev | 3 | 0.55% | 1 | 4.35% |
Claudio Pisa | 1 | 0.18% | 1 | 4.35% |
Total | 550 | 100.00% | 23 | 100.00% |
/* tx handlers */
static ieee80211_tx_result debug_noinline
ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
{
struct ieee80211_local *local = tx->local;
struct ieee80211_if_managed *ifmgd;
/* driver doesn't support power save */
if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
return TX_CONTINUE;
/* hardware does dynamic power save */
if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
return TX_CONTINUE;
/* dynamic power save disabled */
if (local->hw.conf.dynamic_ps_timeout <= 0)
return TX_CONTINUE;
/* we are scanning, don't enable power save */
if (local->scanning)
return TX_CONTINUE;
if (!local->ps_sdata)
return TX_CONTINUE;
/* No point if we're going to suspend */
if (local->quiescing)
return TX_CONTINUE;
/* dynamic ps is supported only in managed mode */
if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
return TX_CONTINUE;
ifmgd = &tx->sdata->u.mgd;
/*
* Don't wakeup from power save if u-apsd is enabled, voip ac has
* u-apsd enabled and the frame is in voip class. This effectively
* means that even if all access categories have u-apsd enabled, in
* practise u-apsd is only used with the voip ac. This is a
* workaround for the case when received voip class packets do not
* have correct qos tag for some reason, due the network or the
* peer application.
*
* Note: ifmgd->uapsd_queues access is racy here. If the value is
* changed via debugfs, user needs to reassociate manually to have
* everything in sync.
*/
if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
(ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
return TX_CONTINUE;
if (local->hw.conf.flags & IEEE80211_CONF_PS) {
ieee80211_stop_queues_by_reason(&local->hw,
IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_PS,
false);
ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
ieee80211_queue_work(&local->hw,
&local->dynamic_ps_disable_work);
}
/* Don't restart the timer if we're not disassociated */
if (!ifmgd->associated)
return TX_CONTINUE;
mod_timer(&local->dynamic_ps_timer, jiffies +
msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
return TX_CONTINUE;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Kalle Valo | 206 | 83.74% | 2 | 16.67% |
Johannes Berg | 18 | 7.32% | 6 | 50.00% |
Luciano Coelho | 13 | 5.28% | 2 | 16.67% |
Vivek Natarajan | 7 | 2.85% | 1 | 8.33% |
Eliad Peller | 2 | 0.81% | 1 | 8.33% |
Total | 246 | 100.00% | 12 | 100.00% |
static ieee80211_tx_result debug_noinline
ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
bool assoc = false;
if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
return TX_CONTINUE;
if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
!ieee80211_is_probe_req(hdr->frame_control) &&
!ieee80211_is_nullfunc(hdr->frame_control))
/*
* When software scanning only nullfunc frames (to notify
* the sleep state to the AP) and probe requests (for the
* active scan) are allowed, all other frames should not be
* sent and we should not get here, but if we do
* nonetheless, drop them to avoid sending them
* off-channel. See the link below and
* ieee80211_start_scan() for more.
*
* http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
*/
return TX_DROP;
if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
return TX_CONTINUE;
if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
return TX_CONTINUE;
if (tx->flags & IEEE80211_TX_PS_BUFFERED)
return TX_CONTINUE;
if (tx->sta)
assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
if (unlikely(!assoc &&
ieee80211_is_data(hdr->frame_control))) {
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
sdata_info(tx->sdata,
"dropped data frame to not associated station %pM\n",
hdr->addr1);
#endif
I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
return TX_DROP;
}
} else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
/*
* No associated STAs - no need to send multicast
* frames.
*/
return TX_DROP;
}
return TX_CONTINUE;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 173 | 67.32% | 10 | 50.00% |
Harvey Harrison | 16 | 6.23% | 1 | 5.00% |
Rostislav Lisovy | 15 | 5.84% | 1 | 5.00% |
Ben Greear | 13 | 5.06% | 1 | 5.00% |
Kalle Valo | 12 | 4.67% | 2 | 10.00% |
Bill Jordan | 9 | 3.50% | 1 | 5.00% |
Luis Carlos Cobo Rus | 6 | 2.33% | 1 | 5.00% |
Helmut Schaa | 6 | 2.33% | 1 | 5.00% |
Jiri Slaby | 4 | 1.56% | 1 | 5.00% |
Michael Braun | 3 | 1.17% | 1 | 5.00% |
Total | 257 | 100.00% | 20 | 100.00% |
/* This function is called whenever the AP is about to exceed the maximum limit
* of buffered frames for power saving STAs. This situation should not really
* happen often during normal operation, so dropping the oldest buffered packet
* from each queue should be OK to make some room for new frames. */
static void purge_old_ps_buffers(struct ieee80211_local *local)
{
int total = 0, purged = 0;
struct sk_buff *skb;
struct ieee80211_sub_if_data *sdata;
struct sta_info *sta;
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
struct ps_data *ps;
if (sdata->vif.type == NL80211_IFTYPE_AP)
ps = &sdata->u.ap.ps;
else if (ieee80211_vif_is_mesh(&sdata->vif))
ps = &sdata->u.mesh.ps;
else
continue;
skb = skb_dequeue(&ps->bc_buf);
if (skb) {
purged++;
ieee80211_free_txskb(&local->hw, skb);
}
total += skb_queue_len(&ps->bc_buf);
}
/*
* Drop one frame from each station from the lowest-priority
* AC that has frames at all.
*/
list_for_each_entry_rcu(sta, &local->sta_list, list) {
int ac;
for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
skb = skb_dequeue(&sta->ps_tx_buf[ac]);
total += skb_queue_len(&sta->ps_tx_buf[ac]);
if (skb) {
purged++;
ieee80211_free_txskb(&local->hw, skb);
break;
}
}
}
local->total_ps_buffered = total;
ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 179 | 78.85% | 8 | 61.54% |
Marco Porsch | 34 | 14.98% | 2 | 15.38% |
Felix Fietkau | 12 | 5.29% | 2 | 15.38% |
Joe Perches | 2 | 0.88% | 1 | 7.69% |
Total | 227 | 100.00% | 13 | 100.00% |
static ieee80211_tx_result
ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
struct ps_data *ps;
/*
* broadcast/multicast frame
*
* If any of the associated/peer stations is in power save mode,
* the frame is buffered to be sent after DTIM beacon frame.
* This is done either by the hardware or us.
*/
/* powersaving STAs currently only in AP/VLAN/mesh mode */
if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
if (!tx->sdata->bss)
return TX_CONTINUE;
ps = &tx->sdata->bss->ps;
} else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
ps = &tx->sdata->u.mesh.ps;
} else {
return TX_CONTINUE;
}
/* no buffering for ordered frames */
if (ieee80211_has_order(hdr->frame_control))
return TX_CONTINUE;
if (ieee80211_is_probe_req(hdr->frame_control))
return TX_CONTINUE;
if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
info->hw_queue = tx->sdata->vif.cab_queue;
/* no stations in PS mode */
if (!atomic_read(&ps->num_sta_ps))
return TX_CONTINUE;
info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
/* device releases frame after DTIM beacon */
if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
return TX_CONTINUE;
/* buffered in mac80211 */
if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
purge_old_ps_buffers(tx->local);
if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
ps_dbg(tx->sdata,
"BC TX buffer full - dropping the oldest frame\n");
ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
} else
tx->local->total_ps_buffered++;
skb_queue_tail(&ps->bc_buf, tx->skb);
return TX_QUEUED;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 189 | 63.00% | 14 | 77.78% |
Marco Porsch | 82 | 27.33% | 2 | 11.11% |
Harvey Harrison | 21 | 7.00% | 1 | 5.56% |
Felix Fietkau | 8 | 2.67% | 1 | 5.56% |
Total | 300 | 100.00% | 18 | 100.00% |
static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
struct sk_buff *skb)
{
if (!ieee80211_is_mgmt(fc))
return 0;
if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
return 0;
if (!ieee80211_is_robust_mgmt_frame(skb))
return 0;
return 1;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jouni Malinen | 60 | 98.36% | 1 | 50.00% |
Johannes Berg | 1 | 1.64% | 1 | 50.00% |
Total | 61 | 100.00% | 2 | 100.00% |
static ieee80211_tx_result
ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
{
struct sta_info *sta = tx->sta;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
struct ieee80211_local *local = tx->local;
if (unlikely(!sta))
return TX_CONTINUE;
if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
!(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
int ac = skb_get_queue_mapping(tx->skb);
if (ieee80211_is_mgmt(hdr->frame_control) &&
!ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
return TX_CONTINUE;
}
ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
sta->sta.addr, sta->sta.aid, ac);
if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
purge_old_ps_buffers(tx->local);
/* sync with ieee80211_sta_ps_deliver_wakeup */
spin_lock(&sta->ps_lock);
/*
* STA woke up the meantime and all the frames on ps_tx_buf have
* been queued to pending queue. No reordering can happen, go
* ahead and Tx the packet.
*/
if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
!test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
!test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
spin_unlock(&sta->ps_lock);
return TX_CONTINUE;
}
if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
ps_dbg(tx->sdata,
"STA %pM TX buffer for AC %d full - dropping oldest frame\n",
sta->sta.addr, ac);
ieee80211_free_txskb(&local->hw, old);
} else
tx->local->total_ps_buffered++;
info->control.jiffies = jiffies;
info->control.vif = &tx->sdata->vif;
info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
spin_unlock(&sta->ps_lock);
if (!timer_pending(&local->sta_cleanup))
mod_timer(&local->sta_cleanup,
round_jiffies(jiffies +
STA_INFO_CLEANUP_INTERVAL));
/*
* We queued up some frames, so the TIM bit might
* need to be set, recalculate it.
*/
sta_info_recalc_tim(sta);
return TX_QUEUED;
} else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
ps_dbg(tx->sdata,
"STA %pM in PS mode, but polling/in SP -> send frame\n",
sta->sta.addr);
}
return TX_CONTINUE;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 337 | 78.92% | 20 | 83.33% |
Emmanuel Grumbach | 49 | 11.48% | 1 | 4.17% |
Juuso Oikarinen | 34 | 7.96% | 1 | 4.17% |
Felix Fietkau | 6 | 1.41% | 1 | 4.17% |
Harvey Harrison | 1 | 0.23% | 1 | 4.17% |
Total | 427 | 100.00% | 24 | 100.00% |
static ieee80211_tx_result debug_noinline
ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
{
if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
return TX_CONTINUE;
if (tx->flags & IEEE80211_TX_UNICAST)
return ieee80211_tx_h_unicast_ps_buf(tx);
else
return ieee80211_tx_h_multicast_ps_buf(tx);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 41 | 87.23% | 4 | 66.67% |
Jiri Slaby | 4 | 8.51% | 1 | 16.67% |
Felix Fietkau | 2 | 4.26% | 1 | 16.67% |
Total | 47 | 100.00% | 6 | 100.00% |
static ieee80211_tx_result debug_noinline
ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
if (tx->sdata->control_port_no_encrypt)
info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
}
return TX_CONTINUE;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 68 | 91.89% | 5 | 83.33% |
Jouni Malinen | 6 | 8.11% | 1 | 16.67% |
Total | 74 | 100.00% | 6 | 100.00% |
static ieee80211_tx_result debug_noinline
ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
{
struct ieee80211_key *key;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT))
tx->key = NULL;
else if (tx->sta &&
(key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
tx->key = key;
else if (ieee80211_is_group_privacy_action(tx->skb) &&
(key = rcu_dereference(tx->sdata->default_multicast_key)))
tx->key = key;
else if (ieee80211_is_mgmt(hdr->frame_control) &&
is_multicast_ether_addr(hdr->addr1) &&
ieee80211_is_robust_mgmt_frame(tx->skb) &&
(key = rcu_dereference(tx->sdata->default_mgmt_key)))
tx->key = key;
else if (is_multicast_ether_addr(hdr->addr1) &&
(key = rcu_dereference(tx->sdata->default_multicast_key)))
tx->key = key;
else if (!is_multicast_ether_addr(hdr->addr1) &&
(key = rcu_dereference(tx->sdata->default_unicast_key)))
tx->key = key;
else
tx->key = NULL;
if (tx->key) {
bool skip_hw = false;
/* TODO: add threshold stuff again */
switch (tx->key->conf.cipher) {
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
case WLAN_CIPHER_SUITE_TKIP:
if (!ieee80211_is_data_present(hdr->frame_control))
tx->key = NULL;
break;
case WLAN_CIPHER_SUITE_CCMP:
case WLAN_CIPHER_SUITE_CCMP_256:
case WLAN_CIPHER_SUITE_GCMP:
case WLAN_CIPHER_SUITE_GCMP_256:
if (!ieee80211_is_data_present(hdr->frame_control) &&
!ieee80211_use_mfp(hdr->frame_control, tx->sta,
tx->skb) &&
!ieee80211_is_group_privacy_action(tx->skb))
tx->key = NULL;
else
skip_hw = (tx->key->conf.flags &
IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
ieee80211_is_mgmt(hdr->frame_control);
break;
case WLAN_CIPHER_SUITE_AES_CMAC:
case WLAN_CIPHER_SUITE_BIP_CMAC_256:
case WLAN_CIPHER_SUITE_BIP_GMAC_128:
case WLAN_CIPHER_SUITE_BIP_GMAC_256:
if (!ieee80211_is_mgmt(hdr->frame_control))
tx->key = NULL;
break;
}
if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
!ieee80211_is_deauth(hdr->frame_control)))
return TX_DROP;
if (!skip_hw && tx->key &&
tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
info->control.hw_key = &tx->key->conf;
}
return TX_CONTINUE;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 271 | 60.22% | 20 | 60.61% |
Jouni Malinen | 110 | 24.44% | 7 | 21.21% |
Masashi Honma | 37 | 8.22% | 1 | 3.03% |
Harvey Harrison | 16 | 3.56% | 1 | 3.03% |
Max Stepanov | 7 | 1.56% | 1 | 3.03% |
Nicolas Cavallari | 6 | 1.33% | 1 | 3.03% |
Ron Rindjunsky | 2 | 0.44% | 1 | 3.03% |
Kalle Valo | 1 | 0.22% | 1 | 3.03% |
Total | 450 | 100.00% | 33 | 100.00% |
static ieee80211_tx_result debug_noinline
ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
struct ieee80211_hdr *hdr = (void *)tx->skb->data;
struct ieee80211_supported_band *sband;
u32 len;
struct ieee80211_tx_rate_control txrc;
struct ieee80211_sta_rates *ratetbl = NULL;
bool assoc = false;
memset(&txrc, 0, sizeof(txrc));
sband = tx->local->hw.wiphy->bands[info->band];
len = min_t(u32, tx->skb->len + FCS_LEN,
tx->local->hw.wiphy->frag_threshold);
/* set up the tx rate control struct we give the RC algo */
txrc.hw = &tx->local->hw;
txrc.sband = sband;
txrc.bss_conf = &tx->sdata->vif.bss_conf;
txrc.skb = tx->skb;
txrc.reported_rate.idx = -1;
txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1)
txrc.max_rate_idx = -1;
else
txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
if (tx->sdata->rc_has_mcs_mask[info->band])
txrc.rate_idx_mcs_mask =
tx->sdata->rc_rateidx_mcs_mask[info->band];
txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP