@@ -2,7 +2,7 @@ obj-$(CONFIG_MAC80211) += mac80211.o
# mac80211 objects
mac80211-y := \
- main.o \
+ main.o status.o \
sta_info.o \
wep.o \
wpa.o \
@@ -23,6 +23,7 @@
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/etherdevice.h>
+#include <net/ieee80211_radiotap.h>
#include <net/cfg80211.h>
#include <net/mac80211.h>
#include "key.h"
@@ -948,6 +949,18 @@ netdev_tx_t ieee80211_monitor_start_xmit
netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
struct net_device *dev);
+/*
+ * radiotap header for status frames
+ */
+struct ieee80211_tx_status_rtap_hdr {
+ struct ieee80211_radiotap_header hdr;
+ u8 rate;
+ u8 padding_for_rate;
+ __le16 tx_flags;
+ u8 data_retries;
+} __attribute__ ((packed));
+
+
/* HT */
void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
struct ieee80211_ht_cap *ht_cap_ie,
@@ -9,7 +9,6 @@
*/
#include <net/mac80211.h>
-#include <net/ieee80211_radiotap.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/netdevice.h>
@@ -30,26 +29,11 @@
#include "rate.h"
#include "mesh.h"
#include "wep.h"
-#include "wme.h"
-#include "aes_ccm.h"
#include "led.h"
#include "cfg.h"
#include "debugfs.h"
#include "debugfs_netdev.h"
-/*
- * For seeing transmitted packets on monitor interfaces
- * we have a radiotap header too.
- */
-struct ieee80211_tx_status_rtap_hdr {
- struct ieee80211_radiotap_header hdr;
- u8 rate;
- u8 padding_for_rate;
- __le16 tx_flags;
- u8 data_retries;
-} __attribute__ ((packed));
-
-
void ieee80211_configure_filter(struct ieee80211_local *local)
{
u64 mc;
@@ -253,28 +237,6 @@ u32 ieee80211_reset_erp_info(struct ieee
BSS_CHANGED_ERP_SLOT;
}
-void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
- struct sk_buff *skb)
-{
- struct ieee80211_local *local = hw_to_local(hw);
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- int tmp;
-
- skb->pkt_type = IEEE80211_TX_STATUS_MSG;
- skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
- &local->skb_queue : &local->skb_queue_unreliable, skb);
- tmp = skb_queue_len(&local->skb_queue) +
- skb_queue_len(&local->skb_queue_unreliable);
- while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
- (skb = skb_dequeue(&local->skb_queue_unreliable))) {
- dev_kfree_skb_irq(skb);
- tmp--;
- I802_DEBUG_INC(local->tx_status_drop);
- }
- tasklet_schedule(&local->tasklet);
-}
-EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
-
static void ieee80211_tasklet_handler(unsigned long data)
{
struct ieee80211_local *local = (struct ieee80211_local *) data;
@@ -315,304 +277,6 @@ static void ieee80211_tasklet_handler(un
}
}
-static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
- struct sta_info *sta,
- struct sk_buff *skb)
-{
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-
- /*
- * XXX: This is temporary!
- *
- * The problem here is that when we get here, the driver will
- * quite likely have pretty much overwritten info->control by
- * using info->driver_data or info->rate_driver_data. Thus,
- * when passing out the frame to the driver again, we would be
- * passing completely bogus data since the driver would then
- * expect a properly filled info->control. In mac80211 itself
- * the same problem occurs, since we need info->control.vif
- * internally.
- *
- * To fix this, we should send the frame through TX processing
- * again. However, it's not that simple, since the frame will
- * have been software-encrypted (if applicable) already, and
- * encrypting it again doesn't do much good. So to properly do
- * that, we not only have to skip the actual 'raw' encryption
- * (key selection etc. still has to be done!) but also the
- * sequence number assignment since that impacts the crypto
- * encapsulation, of course.
- *
- * Hence, for now, fix the bug by just dropping the frame.
- */
- goto drop;
-
- sta->tx_filtered_count++;
-
- /*
- * Clear the TX filter mask for this STA when sending the next
- * packet. If the STA went to power save mode, this will happen
- * when it wakes up for the next time.
- */
- set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
-
- /*
- * This code races in the following way:
- *
- * (1) STA sends frame indicating it will go to sleep and does so
- * (2) hardware/firmware adds STA to filter list, passes frame up
- * (3) hardware/firmware processes TX fifo and suppresses a frame
- * (4) we get TX status before having processed the frame and
- * knowing that the STA has gone to sleep.
- *
- * This is actually quite unlikely even when both those events are
- * processed from interrupts coming in quickly after one another or
- * even at the same time because we queue both TX status events and
- * RX frames to be processed by a tasklet and process them in the
- * same order that they were received or TX status last. Hence, there
- * is no race as long as the frame RX is processed before the next TX
- * status, which drivers can ensure, see below.
- *
- * Note that this can only happen if the hardware or firmware can
- * actually add STAs to the filter list, if this is done by the
- * driver in response to set_tim() (which will only reduce the race
- * this whole filtering tries to solve, not completely solve it)
- * this situation cannot happen.
- *
- * To completely solve this race drivers need to make sure that they
- * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
- * functions and
- * (b) always process RX events before TX status events if ordering
- * can be unknown, for example with different interrupt status
- * bits.
- */
- if (test_sta_flags(sta, WLAN_STA_PS_STA) &&
- skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
- skb_queue_tail(&sta->tx_filtered, skb);
- return;
- }
-
- if (!test_sta_flags(sta, WLAN_STA_PS_STA) &&
- !(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
- /* Software retry the packet once */
- info->flags |= IEEE80211_TX_INTFL_RETRIED;
- ieee80211_add_pending_skb(local, skb);
- return;
- }
-
- drop:
-#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- if (net_ratelimit())
- printk(KERN_DEBUG "%s: dropped TX filtered frame, "
- "queue_len=%d PS=%d @%lu\n",
- wiphy_name(local->hw.wiphy),
- skb_queue_len(&sta->tx_filtered),
- !!test_sta_flags(sta, WLAN_STA_PS_STA), jiffies);
-#endif
- dev_kfree_skb(skb);
-}
-
-void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
-{
- struct sk_buff *skb2;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- struct ieee80211_local *local = hw_to_local(hw);
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- u16 frag, type;
- __le16 fc;
- struct ieee80211_supported_band *sband;
- struct ieee80211_tx_status_rtap_hdr *rthdr;
- struct ieee80211_sub_if_data *sdata;
- struct net_device *prev_dev = NULL;
- struct sta_info *sta;
- int retry_count = -1, i;
-
- for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
- /* the HW cannot have attempted that rate */
- if (i >= hw->max_rates) {
- info->status.rates[i].idx = -1;
- info->status.rates[i].count = 0;
- }
-
- retry_count += info->status.rates[i].count;
- }
- if (retry_count < 0)
- retry_count = 0;
-
- rcu_read_lock();
-
- sband = local->hw.wiphy->bands[info->band];
-
- sta = sta_info_get(local, hdr->addr1);
-
- if (sta) {
- if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
- test_sta_flags(sta, WLAN_STA_PS_STA)) {
- /*
- * The STA is in power save mode, so assume
- * that this TX packet failed because of that.
- */
- ieee80211_handle_filtered_frame(local, sta, skb);
- rcu_read_unlock();
- return;
- }
-
- fc = hdr->frame_control;
-
- if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
- (ieee80211_is_data_qos(fc))) {
- u16 tid, ssn;
- u8 *qc;
-
- qc = ieee80211_get_qos_ctl(hdr);
- tid = qc[0] & 0xf;
- ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
- & IEEE80211_SCTL_SEQ);
- ieee80211_send_bar(sta->sdata, hdr->addr1,
- tid, ssn);
- }
-
- if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
- ieee80211_handle_filtered_frame(local, sta, skb);
- rcu_read_unlock();
- return;
- } else {
- if (!(info->flags & IEEE80211_TX_STAT_ACK))
- sta->tx_retry_failed++;
- sta->tx_retry_count += retry_count;
- }
-
- rate_control_tx_status(local, sband, sta, skb);
- if (ieee80211_vif_is_mesh(&sta->sdata->vif))
- ieee80211s_update_metric(local, sta, skb);
- }
-
- rcu_read_unlock();
-
- ieee80211_led_tx(local, 0);
-
- /* SNMP counters
- * Fragments are passed to low-level drivers as separate skbs, so these
- * are actually fragments, not frames. Update frame counters only for
- * the first fragment of the frame. */
-
- frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
- type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
-
- if (info->flags & IEEE80211_TX_STAT_ACK) {
- if (frag == 0) {
- local->dot11TransmittedFrameCount++;
- if (is_multicast_ether_addr(hdr->addr1))
- local->dot11MulticastTransmittedFrameCount++;
- if (retry_count > 0)
- local->dot11RetryCount++;
- if (retry_count > 1)
- local->dot11MultipleRetryCount++;
- }
-
- /* This counter shall be incremented for an acknowledged MPDU
- * with an individual address in the address 1 field or an MPDU
- * with a multicast address in the address 1 field of type Data
- * or Management. */
- if (!is_multicast_ether_addr(hdr->addr1) ||
- type == IEEE80211_FTYPE_DATA ||
- type == IEEE80211_FTYPE_MGMT)
- local->dot11TransmittedFragmentCount++;
- } else {
- if (frag == 0)
- local->dot11FailedCount++;
- }
-
- /* this was a transmitted frame, but now we want to reuse it */
- skb_orphan(skb);
-
- /*
- * This is a bit racy but we can avoid a lot of work
- * with this test...
- */
- if (!local->monitors && !local->cooked_mntrs) {
- dev_kfree_skb(skb);
- return;
- }
-
- /* send frame to monitor interfaces now */
-
- if (skb_headroom(skb) < sizeof(*rthdr)) {
- printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
- dev_kfree_skb(skb);
- return;
- }
-
- rthdr = (struct ieee80211_tx_status_rtap_hdr *)
- skb_push(skb, sizeof(*rthdr));
-
- memset(rthdr, 0, sizeof(*rthdr));
- rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
- rthdr->hdr.it_present =
- cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
- (1 << IEEE80211_RADIOTAP_DATA_RETRIES) |
- (1 << IEEE80211_RADIOTAP_RATE));
-
- if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
- !is_multicast_ether_addr(hdr->addr1))
- rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
-
- /*
- * XXX: Once radiotap gets the bitmap reset thing the vendor
- * extensions proposal contains, we can actually report
- * the whole set of tries we did.
- */
- if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
- (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT))
- rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
- else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
- rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
- if (info->status.rates[0].idx >= 0 &&
- !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS))
- rthdr->rate = sband->bitrates[
- info->status.rates[0].idx].bitrate / 5;
-
- /* for now report the total retry_count */
- rthdr->data_retries = retry_count;
-
- /* XXX: is this sufficient for BPF? */
- skb_set_mac_header(skb, 0);
- skb->ip_summed = CHECKSUM_UNNECESSARY;
- skb->pkt_type = PACKET_OTHERHOST;
- skb->protocol = htons(ETH_P_802_2);
- memset(skb->cb, 0, sizeof(skb->cb));
-
- rcu_read_lock();
- list_for_each_entry_rcu(sdata, &local->interfaces, list) {
- if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
- if (!netif_running(sdata->dev))
- continue;
-
- if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) &&
- !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
- (type == IEEE80211_FTYPE_DATA))
- continue;
-
- if (prev_dev) {
- skb2 = skb_clone(skb, GFP_ATOMIC);
- if (skb2) {
- skb2->dev = prev_dev;
- netif_rx(skb2);
- }
- }
-
- prev_dev = sdata->dev;
- }
- }
- if (prev_dev) {
- skb->dev = prev_dev;
- netif_rx(skb);
- skb = NULL;
- }
- rcu_read_unlock();
- dev_kfree_skb(skb);
-}
-EXPORT_SYMBOL(ieee80211_tx_status);
-
static void ieee80211_restart_work(struct work_struct *work)
{
struct ieee80211_local *local =
@@ -0,0 +1,337 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
+ * Copyright 2008-2009 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * 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 <net/mac80211.h>
+#include "ieee80211_i.h"
+#include "rate.h"
+#include "mesh.h"
+#include "led.h"
+
+
+void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
+ struct sk_buff *skb)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ int tmp;
+
+ skb->pkt_type = IEEE80211_TX_STATUS_MSG;
+ skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
+ &local->skb_queue : &local->skb_queue_unreliable, skb);
+ tmp = skb_queue_len(&local->skb_queue) +
+ skb_queue_len(&local->skb_queue_unreliable);
+ while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
+ (skb = skb_dequeue(&local->skb_queue_unreliable))) {
+ dev_kfree_skb_irq(skb);
+ tmp--;
+ I802_DEBUG_INC(local->tx_status_drop);
+ }
+ tasklet_schedule(&local->tasklet);
+}
+EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
+
+static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
+ struct sta_info *sta,
+ struct sk_buff *skb)
+{
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+
+ /*
+ * XXX: This is temporary!
+ *
+ * The problem here is that when we get here, the driver will
+ * quite likely have pretty much overwritten info->control by
+ * using info->driver_data or info->rate_driver_data. Thus,
+ * when passing out the frame to the driver again, we would be
+ * passing completely bogus data since the driver would then
+ * expect a properly filled info->control. In mac80211 itself
+ * the same problem occurs, since we need info->control.vif
+ * internally.
+ *
+ * To fix this, we should send the frame through TX processing
+ * again. However, it's not that simple, since the frame will
+ * have been software-encrypted (if applicable) already, and
+ * encrypting it again doesn't do much good. So to properly do
+ * that, we not only have to skip the actual 'raw' encryption
+ * (key selection etc. still has to be done!) but also the
+ * sequence number assignment since that impacts the crypto
+ * encapsulation, of course.
+ *
+ * Hence, for now, fix the bug by just dropping the frame.
+ */
+ goto drop;
+
+ sta->tx_filtered_count++;
+
+ /*
+ * Clear the TX filter mask for this STA when sending the next
+ * packet. If the STA went to power save mode, this will happen
+ * when it wakes up for the next time.
+ */
+ set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
+
+ /*
+ * This code races in the following way:
+ *
+ * (1) STA sends frame indicating it will go to sleep and does so
+ * (2) hardware/firmware adds STA to filter list, passes frame up
+ * (3) hardware/firmware processes TX fifo and suppresses a frame
+ * (4) we get TX status before having processed the frame and
+ * knowing that the STA has gone to sleep.
+ *
+ * This is actually quite unlikely even when both those events are
+ * processed from interrupts coming in quickly after one another or
+ * even at the same time because we queue both TX status events and
+ * RX frames to be processed by a tasklet and process them in the
+ * same order that they were received or TX status last. Hence, there
+ * is no race as long as the frame RX is processed before the next TX
+ * status, which drivers can ensure, see below.
+ *
+ * Note that this can only happen if the hardware or firmware can
+ * actually add STAs to the filter list, if this is done by the
+ * driver in response to set_tim() (which will only reduce the race
+ * this whole filtering tries to solve, not completely solve it)
+ * this situation cannot happen.
+ *
+ * To completely solve this race drivers need to make sure that they
+ * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
+ * functions and
+ * (b) always process RX events before TX status events if ordering
+ * can be unknown, for example with different interrupt status
+ * bits.
+ */
+ if (test_sta_flags(sta, WLAN_STA_PS_STA) &&
+ skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
+ skb_queue_tail(&sta->tx_filtered, skb);
+ return;
+ }
+
+ if (!test_sta_flags(sta, WLAN_STA_PS_STA) &&
+ !(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
+ /* Software retry the packet once */
+ info->flags |= IEEE80211_TX_INTFL_RETRIED;
+ ieee80211_add_pending_skb(local, skb);
+ return;
+ }
+
+ drop:
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+ if (net_ratelimit())
+ printk(KERN_DEBUG "%s: dropped TX filtered frame, "
+ "queue_len=%d PS=%d @%lu\n",
+ wiphy_name(local->hw.wiphy),
+ skb_queue_len(&sta->tx_filtered),
+ !!test_sta_flags(sta, WLAN_STA_PS_STA), jiffies);
+#endif
+ dev_kfree_skb(skb);
+}
+
+void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
+{
+ struct sk_buff *skb2;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ u16 frag, type;
+ __le16 fc;
+ struct ieee80211_supported_band *sband;
+ struct ieee80211_tx_status_rtap_hdr *rthdr;
+ struct ieee80211_sub_if_data *sdata;
+ struct net_device *prev_dev = NULL;
+ struct sta_info *sta;
+ int retry_count = -1, i;
+
+ for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
+ /* the HW cannot have attempted that rate */
+ if (i >= hw->max_rates) {
+ info->status.rates[i].idx = -1;
+ info->status.rates[i].count = 0;
+ }
+
+ retry_count += info->status.rates[i].count;
+ }
+ if (retry_count < 0)
+ retry_count = 0;
+
+ rcu_read_lock();
+
+ sband = local->hw.wiphy->bands[info->band];
+
+ sta = sta_info_get(local, hdr->addr1);
+
+ if (sta) {
+ if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
+ test_sta_flags(sta, WLAN_STA_PS_STA)) {
+ /*
+ * The STA is in power save mode, so assume
+ * that this TX packet failed because of that.
+ */
+ ieee80211_handle_filtered_frame(local, sta, skb);
+ rcu_read_unlock();
+ return;
+ }
+
+ fc = hdr->frame_control;
+
+ if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
+ (ieee80211_is_data_qos(fc))) {
+ u16 tid, ssn;
+ u8 *qc;
+
+ qc = ieee80211_get_qos_ctl(hdr);
+ tid = qc[0] & 0xf;
+ ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
+ & IEEE80211_SCTL_SEQ);
+ ieee80211_send_bar(sta->sdata, hdr->addr1,
+ tid, ssn);
+ }
+
+ if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
+ ieee80211_handle_filtered_frame(local, sta, skb);
+ rcu_read_unlock();
+ return;
+ } else {
+ if (!(info->flags & IEEE80211_TX_STAT_ACK))
+ sta->tx_retry_failed++;
+ sta->tx_retry_count += retry_count;
+ }
+
+ rate_control_tx_status(local, sband, sta, skb);
+ if (ieee80211_vif_is_mesh(&sta->sdata->vif))
+ ieee80211s_update_metric(local, sta, skb);
+ }
+
+ rcu_read_unlock();
+
+ ieee80211_led_tx(local, 0);
+
+ /* SNMP counters
+ * Fragments are passed to low-level drivers as separate skbs, so these
+ * are actually fragments, not frames. Update frame counters only for
+ * the first fragment of the frame. */
+
+ frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
+ type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
+
+ if (info->flags & IEEE80211_TX_STAT_ACK) {
+ if (frag == 0) {
+ local->dot11TransmittedFrameCount++;
+ if (is_multicast_ether_addr(hdr->addr1))
+ local->dot11MulticastTransmittedFrameCount++;
+ if (retry_count > 0)
+ local->dot11RetryCount++;
+ if (retry_count > 1)
+ local->dot11MultipleRetryCount++;
+ }
+
+ /* This counter shall be incremented for an acknowledged MPDU
+ * with an individual address in the address 1 field or an MPDU
+ * with a multicast address in the address 1 field of type Data
+ * or Management. */
+ if (!is_multicast_ether_addr(hdr->addr1) ||
+ type == IEEE80211_FTYPE_DATA ||
+ type == IEEE80211_FTYPE_MGMT)
+ local->dot11TransmittedFragmentCount++;
+ } else {
+ if (frag == 0)
+ local->dot11FailedCount++;
+ }
+
+ /* this was a transmitted frame, but now we want to reuse it */
+ skb_orphan(skb);
+
+ /*
+ * This is a bit racy but we can avoid a lot of work
+ * with this test...
+ */
+ if (!local->monitors && !local->cooked_mntrs) {
+ dev_kfree_skb(skb);
+ return;
+ }
+
+ /* send frame to monitor interfaces now */
+
+ if (skb_headroom(skb) < sizeof(*rthdr)) {
+ printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
+ dev_kfree_skb(skb);
+ return;
+ }
+
+ rthdr = (struct ieee80211_tx_status_rtap_hdr *)
+ skb_push(skb, sizeof(*rthdr));
+
+ memset(rthdr, 0, sizeof(*rthdr));
+ rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
+ rthdr->hdr.it_present =
+ cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
+ (1 << IEEE80211_RADIOTAP_DATA_RETRIES) |
+ (1 << IEEE80211_RADIOTAP_RATE));
+
+ if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
+ !is_multicast_ether_addr(hdr->addr1))
+ rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
+
+ /*
+ * XXX: Once radiotap gets the bitmap reset thing the vendor
+ * extensions proposal contains, we can actually report
+ * the whole set of tries we did.
+ */
+ if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
+ (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT))
+ rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
+ else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
+ rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
+ if (info->status.rates[0].idx >= 0 &&
+ !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS))
+ rthdr->rate = sband->bitrates[
+ info->status.rates[0].idx].bitrate / 5;
+
+ /* for now report the total retry_count */
+ rthdr->data_retries = retry_count;
+
+ /* XXX: is this sufficient for BPF? */
+ skb_set_mac_header(skb, 0);
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ skb->pkt_type = PACKET_OTHERHOST;
+ skb->protocol = htons(ETH_P_802_2);
+ memset(skb->cb, 0, sizeof(skb->cb));
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+ if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
+ if (!netif_running(sdata->dev))
+ continue;
+
+ if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) &&
+ !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
+ (type == IEEE80211_FTYPE_DATA))
+ continue;
+
+ if (prev_dev) {
+ skb2 = skb_clone(skb, GFP_ATOMIC);
+ if (skb2) {
+ skb2->dev = prev_dev;
+ netif_rx(skb2);
+ }
+ }
+
+ prev_dev = sdata->dev;
+ }
+ }
+ if (prev_dev) {
+ skb->dev = prev_dev;
+ netif_rx(skb);
+ skb = NULL;
+ }
+ rcu_read_unlock();
+ dev_kfree_skb(skb);
+}
+EXPORT_SYMBOL(ieee80211_tx_status);