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Diffstat (limited to 'net/mac80211/rx.c')
-rw-r--r--net/mac80211/rx.c991
1 files changed, 496 insertions, 495 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 7170bf4565a8..f237df408378 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -27,11 +27,6 @@
#include "tkip.h"
#include "wme.h"
-static u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw,
- struct tid_ampdu_rx *tid_agg_rx,
- struct sk_buff *skb,
- u16 mpdu_seq_num,
- int bar_req);
/*
* monitor mode reception
*
@@ -39,11 +34,8 @@ static u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw,
* only useful for monitoring.
*/
static struct sk_buff *remove_monitor_info(struct ieee80211_local *local,
- struct sk_buff *skb,
- int rtap_len)
+ struct sk_buff *skb)
{
- skb_pull(skb, rtap_len);
-
if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) {
if (likely(skb->len > FCS_LEN))
skb_trim(skb, skb->len - FCS_LEN);
@@ -59,15 +51,14 @@ static struct sk_buff *remove_monitor_info(struct ieee80211_local *local,
}
static inline int should_drop_frame(struct sk_buff *skb,
- int present_fcs_len,
- int radiotap_len)
+ int present_fcs_len)
{
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC))
return 1;
- if (unlikely(skb->len < 16 + present_fcs_len + radiotap_len))
+ if (unlikely(skb->len < 16 + present_fcs_len))
return 1;
if (ieee80211_is_ctl(hdr->frame_control) &&
!ieee80211_is_pspoll(hdr->frame_control) &&
@@ -95,10 +86,6 @@ ieee80211_rx_radiotap_len(struct ieee80211_local *local,
if (len & 1) /* padding for RX_FLAGS if necessary */
len++;
- /* make sure radiotap starts at a naturally aligned address */
- if (len % 8)
- len = roundup(len, 8);
-
return len;
}
@@ -116,6 +103,7 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
struct ieee80211_radiotap_header *rthdr;
unsigned char *pos;
+ u16 rx_flags = 0;
rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len);
memset(rthdr, 0, rtap_len);
@@ -134,7 +122,7 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
/* IEEE80211_RADIOTAP_TSFT */
if (status->flag & RX_FLAG_TSFT) {
- *(__le64 *)pos = cpu_to_le64(status->mactime);
+ put_unaligned_le64(status->mactime, pos);
rthdr->it_present |=
cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT);
pos += 8;
@@ -166,17 +154,20 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
pos++;
/* IEEE80211_RADIOTAP_CHANNEL */
- *(__le16 *)pos = cpu_to_le16(status->freq);
+ put_unaligned_le16(status->freq, pos);
pos += 2;
if (status->band == IEEE80211_BAND_5GHZ)
- *(__le16 *)pos = cpu_to_le16(IEEE80211_CHAN_OFDM |
- IEEE80211_CHAN_5GHZ);
+ put_unaligned_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ,
+ pos);
+ else if (status->flag & RX_FLAG_HT)
+ put_unaligned_le16(IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ,
+ pos);
else if (rate->flags & IEEE80211_RATE_ERP_G)
- *(__le16 *)pos = cpu_to_le16(IEEE80211_CHAN_OFDM |
- IEEE80211_CHAN_2GHZ);
+ put_unaligned_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ,
+ pos);
else
- *(__le16 *)pos = cpu_to_le16(IEEE80211_CHAN_CCK |
- IEEE80211_CHAN_2GHZ);
+ put_unaligned_le16(IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ,
+ pos);
pos += 2;
/* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */
@@ -205,10 +196,11 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
/* IEEE80211_RADIOTAP_RX_FLAGS */
/* ensure 2 byte alignment for the 2 byte field as required */
- if ((pos - (unsigned char *)rthdr) & 1)
+ if ((pos - (u8 *)rthdr) & 1)
pos++;
if (status->flag & RX_FLAG_FAILED_PLCP_CRC)
- *(__le16 *)pos |= cpu_to_le16(IEEE80211_RADIOTAP_F_RX_BADPLCP);
+ rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP;
+ put_unaligned_le16(rx_flags, pos);
pos += 2;
}
@@ -227,7 +219,6 @@ ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb,
struct sk_buff *skb, *skb2;
struct net_device *prev_dev = NULL;
int present_fcs_len = 0;
- int rtap_len = 0;
/*
* First, we may need to make a copy of the skb because
@@ -237,25 +228,23 @@ ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb,
* We don't need to, of course, if we aren't going to return
* the SKB because it has a bad FCS/PLCP checksum.
*/
- if (status->flag & RX_FLAG_RADIOTAP)
- rtap_len = ieee80211_get_radiotap_len(origskb->data);
- else
- /* room for the radiotap header based on driver features */
- needed_headroom = ieee80211_rx_radiotap_len(local, status);
+
+ /* room for the radiotap header based on driver features */
+ needed_headroom = ieee80211_rx_radiotap_len(local, status);
if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
present_fcs_len = FCS_LEN;
if (!local->monitors) {
- if (should_drop_frame(origskb, present_fcs_len, rtap_len)) {
+ if (should_drop_frame(origskb, present_fcs_len)) {
dev_kfree_skb(origskb);
return NULL;
}
- return remove_monitor_info(local, origskb, rtap_len);
+ return remove_monitor_info(local, origskb);
}
- if (should_drop_frame(origskb, present_fcs_len, rtap_len)) {
+ if (should_drop_frame(origskb, present_fcs_len)) {
/* only need to expand headroom if necessary */
skb = origskb;
origskb = NULL;
@@ -279,16 +268,14 @@ ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb,
*/
skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC);
- origskb = remove_monitor_info(local, origskb, rtap_len);
+ origskb = remove_monitor_info(local, origskb);
if (!skb)
return origskb;
}
- /* if necessary, prepend radiotap information */
- if (!(status->flag & RX_FLAG_RADIOTAP))
- ieee80211_add_rx_radiotap_header(local, skb, rate,
- needed_headroom);
+ /* prepend radiotap information */
+ ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom);
skb_reset_mac_header(skb);
skb->ip_summed = CHECKSUM_UNNECESSARY;
@@ -489,7 +476,7 @@ ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
- char *dev_addr = rx->dev->dev_addr;
+ char *dev_addr = rx->sdata->dev->dev_addr;
if (ieee80211_is_data(hdr->frame_control)) {
if (is_multicast_ether_addr(hdr->addr1)) {
@@ -518,7 +505,7 @@ ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
if (ieee80211_is_action(hdr->frame_control)) {
mgmt = (struct ieee80211_mgmt *)hdr;
- if (mgmt->u.action.category != PLINK_CATEGORY)
+ if (mgmt->u.action.category != MESH_PLINK_CATEGORY)
return RX_DROP_MONITOR;
return RX_CONTINUE;
}
@@ -543,6 +530,242 @@ ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
return RX_CONTINUE;
}
+#define SEQ_MODULO 0x1000
+#define SEQ_MASK 0xfff
+
+static inline int seq_less(u16 sq1, u16 sq2)
+{
+ return ((sq1 - sq2) & SEQ_MASK) > (SEQ_MODULO >> 1);
+}
+
+static inline u16 seq_inc(u16 sq)
+{
+ return (sq + 1) & SEQ_MASK;
+}
+
+static inline u16 seq_sub(u16 sq1, u16 sq2)
+{
+ return (sq1 - sq2) & SEQ_MASK;
+}
+
+
+static void ieee80211_release_reorder_frame(struct ieee80211_hw *hw,
+ struct tid_ampdu_rx *tid_agg_rx,
+ int index,
+ struct sk_buff_head *frames)
+{
+ struct ieee80211_supported_band *sband;
+ struct ieee80211_rate *rate = NULL;
+ struct sk_buff *skb = tid_agg_rx->reorder_buf[index];
+ struct ieee80211_rx_status *status;
+
+ if (!skb)
+ goto no_frame;
+
+ status = IEEE80211_SKB_RXCB(skb);
+
+ /* release the reordered frames to stack */
+ sband = hw->wiphy->bands[status->band];
+ if (!(status->flag & RX_FLAG_HT))
+ rate = &sband->bitrates[status->rate_idx];
+ tid_agg_rx->stored_mpdu_num--;
+ tid_agg_rx->reorder_buf[index] = NULL;
+ __skb_queue_tail(frames, skb);
+
+no_frame:
+ tid_agg_rx->head_seq_num = seq_inc(tid_agg_rx->head_seq_num);
+}
+
+static void ieee80211_release_reorder_frames(struct ieee80211_hw *hw,
+ struct tid_ampdu_rx *tid_agg_rx,
+ u16 head_seq_num,
+ struct sk_buff_head *frames)
+{
+ int index;
+
+ while (seq_less(tid_agg_rx->head_seq_num, head_seq_num)) {
+ index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn) %
+ tid_agg_rx->buf_size;
+ ieee80211_release_reorder_frame(hw, tid_agg_rx, index, frames);
+ }
+}
+
+/*
+ * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If
+ * the skb was added to the buffer longer than this time ago, the earlier
+ * frames that have not yet been received are assumed to be lost and the skb
+ * can be released for processing. This may also release other skb's from the
+ * reorder buffer if there are no additional gaps between the frames.
+ */
+#define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10)
+
+/*
+ * As this function belongs to the RX path it must be under
+ * rcu_read_lock protection. It returns false if the frame
+ * can be processed immediately, true if it was consumed.
+ */
+static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw,
+ struct tid_ampdu_rx *tid_agg_rx,
+ struct sk_buff *skb,
+ struct sk_buff_head *frames)
+{
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ u16 sc = le16_to_cpu(hdr->seq_ctrl);
+ u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4;
+ u16 head_seq_num, buf_size;
+ int index;
+
+ buf_size = tid_agg_rx->buf_size;
+ head_seq_num = tid_agg_rx->head_seq_num;
+
+ /* frame with out of date sequence number */
+ if (seq_less(mpdu_seq_num, head_seq_num)) {
+ dev_kfree_skb(skb);
+ return true;
+ }
+
+ /*
+ * If frame the sequence number exceeds our buffering window
+ * size release some previous frames to make room for this one.
+ */
+ if (!seq_less(mpdu_seq_num, head_seq_num + buf_size)) {
+ head_seq_num = seq_inc(seq_sub(mpdu_seq_num, buf_size));
+ /* release stored frames up to new head to stack */
+ ieee80211_release_reorder_frames(hw, tid_agg_rx, head_seq_num,
+ frames);
+ }
+
+ /* Now the new frame is always in the range of the reordering buffer */
+
+ index = seq_sub(mpdu_seq_num, tid_agg_rx->ssn) % tid_agg_rx->buf_size;
+
+ /* check if we already stored this frame */
+ if (tid_agg_rx->reorder_buf[index]) {
+ dev_kfree_skb(skb);
+ return true;
+ }
+
+ /*
+ * If the current MPDU is in the right order and nothing else
+ * is stored we can process it directly, no need to buffer it.
+ */
+ if (mpdu_seq_num == tid_agg_rx->head_seq_num &&
+ tid_agg_rx->stored_mpdu_num == 0) {
+ tid_agg_rx->head_seq_num = seq_inc(tid_agg_rx->head_seq_num);
+ return false;
+ }
+
+ /* put the frame in the reordering buffer */
+ tid_agg_rx->reorder_buf[index] = skb;
+ tid_agg_rx->reorder_time[index] = jiffies;
+ tid_agg_rx->stored_mpdu_num++;
+ /* release the buffer until next missing frame */
+ index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn) %
+ tid_agg_rx->buf_size;
+ if (!tid_agg_rx->reorder_buf[index] &&
+ tid_agg_rx->stored_mpdu_num > 1) {
+ /*
+ * No buffers ready to be released, but check whether any
+ * frames in the reorder buffer have timed out.
+ */
+ int j;
+ int skipped = 1;
+ for (j = (index + 1) % tid_agg_rx->buf_size; j != index;
+ j = (j + 1) % tid_agg_rx->buf_size) {
+ if (!tid_agg_rx->reorder_buf[j]) {
+ skipped++;
+ continue;
+ }
+ if (!time_after(jiffies, tid_agg_rx->reorder_time[j] +
+ HT_RX_REORDER_BUF_TIMEOUT))
+ break;
+
+#ifdef CONFIG_MAC80211_HT_DEBUG
+ if (net_ratelimit())
+ printk(KERN_DEBUG "%s: release an RX reorder "
+ "frame due to timeout on earlier "
+ "frames\n",
+ wiphy_name(hw->wiphy));
+#endif
+ ieee80211_release_reorder_frame(hw, tid_agg_rx,
+ j, frames);
+
+ /*
+ * Increment the head seq# also for the skipped slots.
+ */
+ tid_agg_rx->head_seq_num =
+ (tid_agg_rx->head_seq_num + skipped) & SEQ_MASK;
+ skipped = 0;
+ }
+ } else while (tid_agg_rx->reorder_buf[index]) {
+ ieee80211_release_reorder_frame(hw, tid_agg_rx, index, frames);
+ index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn) %
+ tid_agg_rx->buf_size;
+ }
+
+ return true;
+}
+
+/*
+ * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns
+ * true if the MPDU was buffered, false if it should be processed.
+ */
+static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx,
+ struct sk_buff_head *frames)
+{
+ struct sk_buff *skb = rx->skb;
+ struct ieee80211_local *local = rx->local;
+ struct ieee80211_hw *hw = &local->hw;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ struct sta_info *sta = rx->sta;
+ struct tid_ampdu_rx *tid_agg_rx;
+ u16 sc;
+ int tid;
+
+ if (!ieee80211_is_data_qos(hdr->frame_control))
+ goto dont_reorder;
+
+ /*
+ * filter the QoS data rx stream according to
+ * STA/TID and check if this STA/TID is on aggregation
+ */
+
+ if (!sta)
+ goto dont_reorder;
+
+ tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
+
+ if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_OPERATIONAL)
+ goto dont_reorder;
+
+ tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
+
+ /* qos null data frames are excluded */
+ if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC)))
+ goto dont_reorder;
+
+ /* new, potentially un-ordered, ampdu frame - process it */
+
+ /* reset session timer */
+ if (tid_agg_rx->timeout)
+ mod_timer(&tid_agg_rx->session_timer,
+ TU_TO_EXP_TIME(tid_agg_rx->timeout));
+
+ /* if this mpdu is fragmented - terminate rx aggregation session */
+ sc = le16_to_cpu(hdr->seq_ctrl);
+ if (sc & IEEE80211_SCTL_FRAG) {
+ ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->sta.addr,
+ tid, 0, WLAN_REASON_QSTA_REQUIRE_SETUP);
+ dev_kfree_skb(skb);
+ return;
+ }
+
+ if (ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, skb, frames))
+ return;
+
+ dont_reorder:
+ __skb_queue_tail(frames, skb);
+}
static ieee80211_rx_result debug_noinline
ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
@@ -603,7 +826,9 @@ ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
static ieee80211_rx_result debug_noinline
ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+ struct sk_buff *skb = rx->skb;
+ struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
int keyidx;
int hdrlen;
ieee80211_rx_result result = RX_DROP_UNUSABLE;
@@ -644,6 +869,9 @@ ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
if (!(rx->flags & IEEE80211_RX_RA_MATCH))
return RX_CONTINUE;
+ /* start without a key */
+ rx->key = NULL;
+
if (rx->sta)
stakey = rcu_dereference(rx->sta->key);
@@ -657,8 +885,8 @@ ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
return RX_CONTINUE;
} else if (mmie_keyidx >= 0) {
/* Broadcast/multicast robust management frame / BIP */
- if ((rx->status->flag & RX_FLAG_DECRYPTED) &&
- (rx->status->flag & RX_FLAG_IV_STRIPPED))
+ if ((status->flag & RX_FLAG_DECRYPTED) &&
+ (status->flag & RX_FLAG_IV_STRIPPED))
return RX_CONTINUE;
if (mmie_keyidx < NUM_DEFAULT_KEYS ||
@@ -690,8 +918,8 @@ ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
* we somehow allow the driver to tell us which key
* the hardware used if this flag is set?
*/
- if ((rx->status->flag & RX_FLAG_DECRYPTED) &&
- (rx->status->flag & RX_FLAG_IV_STRIPPED))
+ if ((status->flag & RX_FLAG_DECRYPTED) &&
+ (status->flag & RX_FLAG_IV_STRIPPED))
return RX_CONTINUE;
hdrlen = ieee80211_hdrlen(hdr->frame_control);
@@ -727,8 +955,8 @@ ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
/* Check for weak IVs if possible */
if (rx->sta && rx->key->conf.alg == ALG_WEP &&
ieee80211_is_data(hdr->frame_control) &&
- (!(rx->status->flag & RX_FLAG_IV_STRIPPED) ||
- !(rx->status->flag & RX_FLAG_DECRYPTED)) &&
+ (!(status->flag & RX_FLAG_IV_STRIPPED) ||
+ !(status->flag & RX_FLAG_DECRYPTED)) &&
ieee80211_wep_is_weak_iv(rx->skb, rx->key))
rx->sta->wep_weak_iv_count++;
@@ -748,7 +976,7 @@ ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
}
/* either the frame has been decrypted or will be dropped */
- rx->status->flag |= RX_FLAG_DECRYPTED;
+ status->flag |= RX_FLAG_DECRYPTED;
return result;
}
@@ -792,7 +1020,7 @@ static void ap_sta_ps_start(struct sta_info *sta)
struct ieee80211_local *local = sdata->local;
atomic_inc(&sdata->bss->num_sta_ps);
- set_sta_flags(sta, WLAN_STA_PS);
+ set_sta_flags(sta, WLAN_STA_PS_STA);
drv_sta_notify(local, &sdata->vif, STA_NOTIFY_SLEEP, &sta->sta);
#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
printk(KERN_DEBUG "%s: STA %pM aid %d enters power save mode\n",
@@ -800,45 +1028,37 @@ static void ap_sta_ps_start(struct sta_info *sta)
#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
}
-static int ap_sta_ps_end(struct sta_info *sta)
+static void ap_sta_ps_end(struct sta_info *sta)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
- struct ieee80211_local *local = sdata->local;
- int sent, buffered;
atomic_dec(&sdata->bss->num_sta_ps);
- clear_sta_flags(sta, WLAN_STA_PS);
- drv_sta_notify(local, &sdata->vif, STA_NOTIFY_AWAKE, &sta->sta);
-
- if (!skb_queue_empty(&sta->ps_tx_buf))
- sta_info_clear_tim_bit(sta);
+ clear_sta_flags(sta, WLAN_STA_PS_STA);
#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
printk(KERN_DEBUG "%s: STA %pM aid %d exits power save mode\n",
sdata->dev->name, sta->sta.addr, sta->sta.aid);
#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
- /* Send all buffered frames to the station */
- sent = ieee80211_add_pending_skbs(local, &sta->tx_filtered);
- buffered = ieee80211_add_pending_skbs(local, &sta->ps_tx_buf);
- sent += buffered;
- local->total_ps_buffered -= buffered;
-
+ if (test_sta_flags(sta, WLAN_STA_PS_DRIVER)) {
#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
- printk(KERN_DEBUG "%s: STA %pM aid %d sending %d filtered/%d PS frames "
- "since STA not sleeping anymore\n", sdata->dev->name,
- sta->sta.addr, sta->sta.aid, sent - buffered, buffered);
+ printk(KERN_DEBUG "%s: STA %pM aid %d driver-ps-blocked\n",
+ sdata->dev->name, sta->sta.addr, sta->sta.aid);
#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
+ return;
+ }
- return sent;
+ ieee80211_sta_ps_deliver_wakeup(sta);
}
static ieee80211_rx_result debug_noinline
ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
{
struct sta_info *sta = rx->sta;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+ struct sk_buff *skb = rx->skb;
+ struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
if (!sta)
return RX_CONTINUE;
@@ -869,9 +1089,8 @@ ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
sta->rx_fragments++;
sta->rx_bytes += rx->skb->len;
- sta->last_signal = rx->status->signal;
- sta->last_qual = rx->status->qual;
- sta->last_noise = rx->status->noise;
+ sta->last_signal = status->signal;
+ sta->last_noise = status->noise;
/*
* Change STA power saving mode only at the end of a frame
@@ -880,7 +1099,7 @@ ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
if (!ieee80211_has_morefrags(hdr->frame_control) &&
(rx->sdata->vif.type == NL80211_IFTYPE_AP ||
rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) {
- if (test_sta_flags(sta, WLAN_STA_PS)) {
+ if (test_sta_flags(sta, WLAN_STA_PS_STA)) {
/*
* Ignore doze->wake transitions that are
* indicated by non-data frames, the standard
@@ -891,19 +1110,24 @@ ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
*/
if (ieee80211_is_data(hdr->frame_control) &&
!ieee80211_has_pm(hdr->frame_control))
- rx->sent_ps_buffered += ap_sta_ps_end(sta);
+ ap_sta_ps_end(sta);
} else {
if (ieee80211_has_pm(hdr->frame_control))
ap_sta_ps_start(sta);
}
}
- /* Drop data::nullfunc frames silently, since they are used only to
- * control station power saving mode. */
- if (ieee80211_is_nullfunc(hdr->frame_control)) {
+ /*
+ * Drop (qos-)data::nullfunc frames silently, since they
+ * are used only to control station power saving mode.
+ */
+ if (ieee80211_is_nullfunc(hdr->frame_control) ||
+ ieee80211_is_qos_nullfunc(hdr->frame_control)) {
I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc);
- /* Update counter and free packet here to avoid counting this
- * as a dropped packed. */
+ /*
+ * Update counter and free packet here to avoid
+ * counting this as a dropped packed.
+ */
sta->rx_packets++;
dev_kfree_skb(rx->skb);
return RX_QUEUED;
@@ -1103,9 +1327,7 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
static ieee80211_rx_result debug_noinline
ieee80211_rx_h_ps_poll(struct ieee80211_rx_data *rx)
{
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
- struct sk_buff *skb;
- int no_pending_pkts;
+ struct ieee80211_sub_if_data *sdata = rx->sdata;
__le16 fc = ((struct ieee80211_hdr *)rx->skb->data)->frame_control;
if (likely(!rx->sta || !ieee80211_is_pspoll(fc) ||
@@ -1116,56 +1338,10 @@ ieee80211_rx_h_ps_poll(struct ieee80211_rx_data *rx)
(sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
return RX_DROP_UNUSABLE;
- skb = skb_dequeue(&rx->sta->tx_filtered);
- if (!skb) {
- skb = skb_dequeue(&rx->sta->ps_tx_buf);
- if (skb)
- rx->local->total_ps_buffered--;
- }
- no_pending_pkts = skb_queue_empty(&rx->sta->tx_filtered) &&
- skb_queue_empty(&rx->sta->ps_tx_buf);
-
- if (skb) {
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- struct ieee80211_hdr *hdr =
- (struct ieee80211_hdr *) 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_PSPOLL_RESPONSE;
-
-#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
- printk(KERN_DEBUG "STA %pM aid %d: PS Poll (entries after %d)\n",
- rx->sta->sta.addr, rx->sta->sta.aid,
- skb_queue_len(&rx->sta->ps_tx_buf));
-#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
-
- /* Use MoreData flag to indicate whether there are more
- * buffered frames for this STA */
- if (no_pending_pkts)
- hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
- else
- hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA);
-
- ieee80211_add_pending_skb(rx->local, skb);
-
- if (no_pending_pkts)
- sta_info_clear_tim_bit(rx->sta);
-#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
- } else if (!rx->sent_ps_buffered) {
- /*
- * FIXME: This can be the result of a race condition between
- * us expiring a frame and the station polling for it.
- * Should we send it a null-func frame indicating we
- * have nothing buffered for it?
- */
- printk(KERN_DEBUG "%s: STA %pM sent PS Poll even "
- "though there are no buffered frames for it\n",
- rx->dev->name, rx->sta->sta.addr);
-#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
- }
+ if (!test_sta_flags(rx->sta, WLAN_STA_PS_DRIVER))
+ ieee80211_sta_ps_deliver_poll_response(rx->sta);
+ else
+ set_sta_flags(rx->sta, WLAN_STA_PSPOLL);
/* Free PS Poll skb here instead of returning RX_DROP that would
* count as an dropped frame. */
@@ -1206,11 +1382,14 @@ ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx)
static int
ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc)
{
+ struct sk_buff *skb = rx->skb;
+ struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+
/*
* Pass through unencrypted frames if the hardware has
* decrypted them already.
*/
- if (rx->status->flag & RX_FLAG_DECRYPTED)
+ if (status->flag & RX_FLAG_DECRYPTED)
return 0;
/* Drop unencrypted frames if key is set. */
@@ -1224,8 +1403,8 @@ ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc)
rx->key))
return -EACCES;
/* BIP does not use Protected field, so need to check MMIE */
- if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb)
- && ieee80211_get_mmie_keyidx(rx->skb) < 0 &&
+ if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) &&
+ ieee80211_get_mmie_keyidx(rx->skb) < 0 &&
rx->key))
return -EACCES;
/*
@@ -1244,8 +1423,18 @@ ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc)
static int
__ieee80211_data_to_8023(struct ieee80211_rx_data *rx)
{
- struct net_device *dev = rx->dev;
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct ieee80211_sub_if_data *sdata = rx->sdata;
+ struct net_device *dev = sdata->dev;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+
+ if (ieee80211_has_a4(hdr->frame_control) &&
+ sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta)
+ return -1;
+
+ if (is_multicast_ether_addr(hdr->addr1) &&
+ ((sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) ||
+ (sdata->vif.type == NL80211_IFTYPE_STATION && sdata->u.mgd.use_4addr)))
+ return -1;
return ieee80211_data_to_8023(rx->skb, dev->dev_addr, sdata->vif.type);
}
@@ -1264,7 +1453,7 @@ static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc)
* of whether the frame was encrypted or not.
*/
if (ehdr->h_proto == htons(ETH_P_PAE) &&
- (compare_ether_addr(ehdr->h_dest, rx->dev->dev_addr) == 0 ||
+ (compare_ether_addr(ehdr->h_dest, rx->sdata->dev->dev_addr) == 0 ||
compare_ether_addr(ehdr->h_dest, pae_group_addr) == 0))
return true;
@@ -1281,10 +1470,10 @@ static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc)
static void
ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
{
- struct net_device *dev = rx->dev;
+ struct ieee80211_sub_if_data *sdata = rx->sdata;
+ struct net_device *dev = sdata->dev;
struct ieee80211_local *local = rx->local;
struct sk_buff *skb, *xmit_skb;
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
struct sta_info *dsta;
@@ -1294,7 +1483,8 @@ ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
if ((sdata->vif.type == NL80211_IFTYPE_AP ||
sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
!(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) &&
- (rx->flags & IEEE80211_RX_RA_MATCH)) {
+ (rx->flags & IEEE80211_RX_RA_MATCH) &&
+ (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) {
if (is_multicast_ether_addr(ehdr->h_dest)) {
/*
* send multicast frames both to higher layers in
@@ -1337,10 +1527,10 @@ ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
skb = NULL;
} else {
u8 *data = skb->data;
- size_t len = skb->len;
- u8 *new = __skb_push(skb, align);
- memmove(new, data, len);
- __skb_trim(skb, len);
+ size_t len = skb_headlen(skb);
+ skb->data -= align;
+ memmove(skb->data, data, len);
+ skb_set_tail_pointer(skb, len);
}
}
#endif
@@ -1365,7 +1555,7 @@ ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
static ieee80211_rx_result debug_noinline
ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx)
{
- struct net_device *dev = rx->dev;
+ struct net_device *dev = rx->sdata->dev;
struct ieee80211_local *local = rx->local;
u16 ethertype;
u8 *payload;
@@ -1490,12 +1680,11 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
unsigned int hdrlen;
struct sk_buff *skb = rx->skb, *fwd_skb;
struct ieee80211_local *local = rx->local;
- struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_sub_if_data *sdata = rx->sdata;
hdr = (struct ieee80211_hdr *) skb->data;
hdrlen = ieee80211_hdrlen(hdr->frame_control);
mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
- sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
if (!ieee80211_is_data(hdr->frame_control))
return RX_CONTINUE;
@@ -1504,19 +1693,28 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
/* illegal frame */
return RX_DROP_MONITOR;
- if (!is_multicast_ether_addr(hdr->addr1) &&
- (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6)) {
+ if (mesh_hdr->flags & MESH_FLAGS_AE) {
struct mesh_path *mppath;
+ char *proxied_addr;
+ char *mpp_addr;
+
+ if (is_multicast_ether_addr(hdr->addr1)) {
+ mpp_addr = hdr->addr3;
+ proxied_addr = mesh_hdr->eaddr1;
+ } else {
+ mpp_addr = hdr->addr4;
+ proxied_addr = mesh_hdr->eaddr2;
+ }
rcu_read_lock();
- mppath = mpp_path_lookup(mesh_hdr->eaddr2, sdata);
+ mppath = mpp_path_lookup(proxied_addr, sdata);
if (!mppath) {
- mpp_path_add(mesh_hdr->eaddr2, hdr->addr4, sdata);
+ mpp_path_add(proxied_addr, mpp_addr, sdata);
} else {
spin_lock_bh(&mppath->state_lock);
mppath->exp_time = jiffies;
- if (compare_ether_addr(mppath->mpp, hdr->addr4) != 0)
- memcpy(mppath->mpp, hdr->addr4, ETH_ALEN);
+ if (compare_ether_addr(mppath->mpp, mpp_addr) != 0)
+ memcpy(mppath->mpp, mpp_addr, ETH_ALEN);
spin_unlock_bh(&mppath->state_lock);
}
rcu_read_unlock();
@@ -1524,7 +1722,7 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
/* Frame has reached destination. Don't forward */
if (!is_multicast_ether_addr(hdr->addr1) &&
- compare_ether_addr(rx->dev->dev_addr, hdr->addr3) == 0)
+ compare_ether_addr(sdata->dev->dev_addr, hdr->addr3) == 0)
return RX_CONTINUE;
mesh_hdr->ttl--;
@@ -1541,10 +1739,10 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
if (!fwd_skb && net_ratelimit())
printk(KERN_DEBUG "%s: failed to clone mesh frame\n",
- rx->dev->name);
+ sdata->dev->name);
fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data;
- memcpy(fwd_hdr->addr2, rx->dev->dev_addr, ETH_ALEN);
+ memcpy(fwd_hdr->addr2, sdata->dev->dev_addr, ETH_ALEN);
info = IEEE80211_SKB_CB(fwd_skb);
memset(info, 0, sizeof(*info));
info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
@@ -1578,7 +1776,7 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
}
if (is_multicast_ether_addr(hdr->addr1) ||
- rx->dev->flags & IFF_PROMISC)
+ sdata->dev->flags & IFF_PROMISC)
return RX_CONTINUE;
else
return RX_DROP_MONITOR;
@@ -1588,7 +1786,8 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
static ieee80211_rx_result debug_noinline
ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
{
- struct net_device *dev = rx->dev;
+ struct ieee80211_sub_if_data *sdata = rx->sdata;
+ struct net_device *dev = sdata->dev;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
__le16 fc = hdr->frame_control;
int err;
@@ -1599,6 +1798,14 @@ ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
return RX_DROP_MONITOR;
+ /*
+ * Allow the cooked monitor interface of an AP to see 4-addr frames so
+ * that a 4-addr station can be detected and moved into a separate VLAN
+ */
+ if (ieee80211_has_a4(hdr->frame_control) &&
+ sdata->vif.type == NL80211_IFTYPE_AP)
+ return RX_DROP_MONITOR;
+
err = __ieee80211_data_to_8023(rx);
if (unlikely(err))
return RX_DROP_UNUSABLE;
@@ -1617,7 +1824,7 @@ ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
}
static ieee80211_rx_result debug_noinline
-ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx)
+ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames)
{
struct ieee80211_local *local = rx->local;
struct ieee80211_hw *hw = &local->hw;
@@ -1632,11 +1839,11 @@ ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx)
if (ieee80211_is_back_req(bar->frame_control)) {
if (!rx->sta)
- return RX_CONTINUE;
+ return RX_DROP_MONITOR;
tid = le16_to_cpu(bar->control) >> 12;
if (rx->sta->ampdu_mlme.tid_state_rx[tid]
!= HT_AGG_STATE_OPERATIONAL)
- return RX_CONTINUE;
+ return RX_DROP_MONITOR;
tid_agg_rx = rx->sta->ampdu_mlme.tid_rx[tid];
start_seq_num = le16_to_cpu(bar->start_seq_num) >> 4;
@@ -1646,13 +1853,11 @@ ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx)
mod_timer(&tid_agg_rx->session_timer,
TU_TO_EXP_TIME(tid_agg_rx->timeout));
- /* manage reordering buffer according to requested */
- /* sequence number */
- rcu_read_lock();
- ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, NULL,
- start_seq_num, 1);
- rcu_read_unlock();
- return RX_DROP_UNUSABLE;
+ /* release stored frames up to start of BAR */
+ ieee80211_release_reorder_frames(hw, tid_agg_rx, start_seq_num,
+ frames);
+ kfree_skb(skb);
+ return RX_QUEUED;
}
return RX_CONTINUE;
@@ -1701,14 +1906,14 @@ static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata,
mgmt->u.action.u.sa_query.trans_id,
WLAN_SA_QUERY_TR_ID_LEN);
- ieee80211_tx_skb(sdata, skb, 1);
+ ieee80211_tx_skb(sdata, skb);
}
static ieee80211_rx_result debug_noinline
ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
{
struct ieee80211_local *local = rx->local;
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
+ struct ieee80211_sub_if_data *sdata = rx->sdata;
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
int len = rx->skb->len;
@@ -1820,7 +2025,7 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
static ieee80211_rx_result debug_noinline
ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx)
{
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
+ struct ieee80211_sub_if_data *sdata = rx->sdata;
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
if (!(rx->flags & IEEE80211_RX_RA_MATCH))
@@ -1858,11 +2063,11 @@ static void ieee80211_rx_michael_mic_report(struct ieee80211_hdr *hdr,
* Some hardware seem to generate incorrect Michael MIC
* reports; ignore them to avoid triggering countermeasures.
*/
- goto ignore;
+ return;
}
if (!ieee80211_has_protected(hdr->frame_control))
- goto ignore;
+ return;
if (rx->sdata->vif.type == NL80211_IFTYPE_AP && keyidx) {
/*
@@ -1871,37 +2076,35 @@ static void ieee80211_rx_michael_mic_report(struct ieee80211_hdr *hdr,
* group keys and only the AP is sending real multicast
* frames in the BSS.
*/
- goto ignore;
+ return;
}
if (!ieee80211_is_data(hdr->frame_control) &&
!ieee80211_is_auth(hdr->frame_control))
- goto ignore;
+ return;
mac80211_ev_michael_mic_failure(rx->sdata, keyidx, hdr, NULL,
GFP_ATOMIC);
- ignore:
- dev_kfree_skb(rx->skb);
- rx->skb = NULL;
}
/* TODO: use IEEE80211_RX_FRAGMENTED */
-static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx)
+static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx,
+ struct ieee80211_rate *rate)
{
struct ieee80211_sub_if_data *sdata;
struct ieee80211_local *local = rx->local;
struct ieee80211_rtap_hdr {
struct ieee80211_radiotap_header hdr;
u8 flags;
- u8 rate;
+ u8 rate_or_pad;
__le16 chan_freq;
__le16 chan_flags;
} __attribute__ ((packed)) *rthdr;
struct sk_buff *skb = rx->skb, *skb2;
struct net_device *prev_dev = NULL;
- struct ieee80211_rx_status *status = rx->status;
+ struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
- if (rx->flags & IEEE80211_RX_CMNTR_REPORTED)
+ if (status->flag & RX_FLAG_INTERNAL_CMTR)
goto out_free_skb;
if (skb_headroom(skb) < sizeof(*rthdr) &&
@@ -1913,10 +2116,13 @@ static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx)
rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
rthdr->hdr.it_present =
cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
- (1 << IEEE80211_RADIOTAP_RATE) |
(1 << IEEE80211_RADIOTAP_CHANNEL));
- rthdr->rate = rx->rate->bitrate / 5;
+ if (rate) {
+ rthdr->rate_or_pad = rate->bitrate / 5;
+ rthdr->hdr.it_present |=
+ cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
+ }
rthdr->chan_freq = cpu_to_le16(status->freq);
if (status->band == IEEE80211_BAND_5GHZ)
@@ -1959,7 +2165,7 @@ static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx)
} else
goto out_free_skb;
- rx->flags |= IEEE80211_RX_CMNTR_REPORTED;
+ status->flag |= RX_FLAG_INTERNAL_CMTR;
return;
out_free_skb:
@@ -1969,62 +2175,87 @@ static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx)
static void ieee80211_invoke_rx_handlers(struct ieee80211_sub_if_data *sdata,
struct ieee80211_rx_data *rx,
- struct sk_buff *skb)
+ struct sk_buff *skb,
+ struct ieee80211_rate *rate)
{
+ struct sk_buff_head reorder_release;
ieee80211_rx_result res = RX_DROP_MONITOR;
+ __skb_queue_head_init(&reorder_release);
+
rx->skb = skb;
rx->sdata = sdata;
- rx->dev = sdata->dev;
#define CALL_RXH(rxh) \
do { \
res = rxh(rx); \
if (res != RX_CONTINUE) \
- goto rxh_done; \
+ goto rxh_next; \
} while (0);
+ /*
+ * NB: the rxh_next label works even if we jump
+ * to it from here because then the list will
+ * be empty, which is a trivial check
+ */
CALL_RXH(ieee80211_rx_h_passive_scan)
CALL_RXH(ieee80211_rx_h_check)
- CALL_RXH(ieee80211_rx_h_decrypt)
- CALL_RXH(ieee80211_rx_h_check_more_data)
- CALL_RXH(ieee80211_rx_h_sta_process)
- CALL_RXH(ieee80211_rx_h_defragment)
- CALL_RXH(ieee80211_rx_h_ps_poll)
- CALL_RXH(ieee80211_rx_h_michael_mic_verify)
- /* must be after MMIC verify so header is counted in MPDU mic */
- CALL_RXH(ieee80211_rx_h_remove_qos_control)
- CALL_RXH(ieee80211_rx_h_amsdu)
+
+ ieee80211_rx_reorder_ampdu(rx, &reorder_release);
+
+ while ((skb = __skb_dequeue(&reorder_release))) {
+ /*
+ * all the other fields are valid across frames
+ * that belong to an aMPDU since they are on the
+ * same TID from the same station
+ */
+ rx->skb = skb;
+
+ CALL_RXH(ieee80211_rx_h_decrypt)
+ CALL_RXH(ieee80211_rx_h_check_more_data)
+ CALL_RXH(ieee80211_rx_h_sta_process)
+ CALL_RXH(ieee80211_rx_h_defragment)
+ CALL_RXH(ieee80211_rx_h_ps_poll)
+ CALL_RXH(ieee80211_rx_h_michael_mic_verify)
+ /* must be after MMIC verify so header is counted in MPDU mic */
+ CALL_RXH(ieee80211_rx_h_remove_qos_control)
+ CALL_RXH(ieee80211_rx_h_amsdu)
#ifdef CONFIG_MAC80211_MESH
- if (ieee80211_vif_is_mesh(&sdata->vif))
- CALL_RXH(ieee80211_rx_h_mesh_fwding);
+ if (ieee80211_vif_is_mesh(&sdata->vif))
+ CALL_RXH(ieee80211_rx_h_mesh_fwding);
#endif
- CALL_RXH(ieee80211_rx_h_data)
- CALL_RXH(ieee80211_rx_h_ctrl)
- CALL_RXH(ieee80211_rx_h_action)
- CALL_RXH(ieee80211_rx_h_mgmt)
+ CALL_RXH(ieee80211_rx_h_data)
+
+ /* special treatment -- needs the queue */
+ res = ieee80211_rx_h_ctrl(rx, &reorder_release);
+ if (res != RX_CONTINUE)
+ goto rxh_next;
+
+ CALL_RXH(ieee80211_rx_h_action)
+ CALL_RXH(ieee80211_rx_h_mgmt)
#undef CALL_RXH
- rxh_done:
- switch (res) {
- case RX_DROP_MONITOR:
- I802_DEBUG_INC(sdata->local->rx_handlers_drop);
- if (rx->sta)
- rx->sta->rx_dropped++;
- /* fall through */
- case RX_CONTINUE:
- ieee80211_rx_cooked_monitor(rx);
- break;
- case RX_DROP_UNUSABLE:
- I802_DEBUG_INC(sdata->local->rx_handlers_drop);
- if (rx->sta)
- rx->sta->rx_dropped++;
- dev_kfree_skb(rx->skb);
- break;
- case RX_QUEUED:
- I802_DEBUG_INC(sdata->local->rx_handlers_queued);
- break;
+ rxh_next:
+ switch (res) {
+ case RX_DROP_MONITOR:
+ I802_DEBUG_INC(sdata->local->rx_handlers_drop);
+ if (rx->sta)
+ rx->sta->rx_dropped++;
+ /* fall through */
+ case RX_CONTINUE:
+ ieee80211_rx_cooked_monitor(rx, rate);
+ break;
+ case RX_DROP_UNUSABLE:
+ I802_DEBUG_INC(sdata->local->rx_handlers_drop);
+ if (rx->sta)
+ rx->sta->rx_dropped++;
+ dev_kfree_skb(rx->skb);
+ break;
+ case RX_QUEUED:
+ I802_DEBUG_INC(sdata->local->rx_handlers_queued);
+ break;
+ }
}
}
@@ -2034,12 +2265,14 @@ static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata,
struct ieee80211_rx_data *rx,
struct ieee80211_hdr *hdr)
{
- u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, sdata->vif.type);
+ struct sk_buff *skb = rx->skb;
+ struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+ u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type);
int multicast = is_multicast_ether_addr(hdr->addr1);
switch (sdata->vif.type) {
case NL80211_IFTYPE_STATION:
- if (!bssid)
+ if (!bssid && !sdata->u.mgd.use_4addr)
return 0;
if (!multicast &&
compare_ether_addr(sdata->dev->dev_addr, hdr->addr1) != 0) {
@@ -2066,10 +2299,10 @@ static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata,
rx->flags &= ~IEEE80211_RX_RA_MATCH;
} else if (!rx->sta) {
int rate_idx;
- if (rx->status->flag & RX_FLAG_HT)
+ if (status->flag & RX_FLAG_HT)
rate_idx = 0; /* TODO: HT rates */
else
- rate_idx = rx->status->rate_idx;
+ rate_idx = status->rate_idx;
rx->sta = ieee80211_ibss_add_sta(sdata, bssid, hdr->addr2,
BIT(rate_idx));
}
@@ -2104,8 +2337,6 @@ static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata,
return 0;
break;
case NL80211_IFTYPE_MONITOR:
- /* take everything */
- break;
case NL80211_IFTYPE_UNSPECIFIED:
case __NL80211_IFTYPE_AFTER_LAST:
/* should never get here */
@@ -2138,23 +2369,9 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
rx.skb = skb;
rx.local = local;
- rx.status = status;
- rx.rate = rate;
-
if (ieee80211_is_data(hdr->frame_control) || ieee80211_is_mgmt(hdr->frame_control))
local->dot11ReceivedFragmentCount++;
- rx.sta = sta_info_get(local, hdr->addr2);
- if (rx.sta) {
- rx.sdata = rx.sta->sdata;
- rx.dev = rx.sta->sdata->dev;
- }
-
- if ((status->flag & RX_FLAG_MMIC_ERROR)) {
- ieee80211_rx_michael_mic_report(hdr, &rx);
- return;
- }
-
if (unlikely(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
test_bit(SCAN_OFF_CHANNEL, &local->scanning)))
rx.flags |= IEEE80211_RX_IN_SCAN;
@@ -2162,13 +2379,20 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
ieee80211_parse_qos(&rx);
ieee80211_verify_alignment(&rx);
- skb = rx.skb;
+ rx.sta = sta_info_get(local, hdr->addr2);
+ if (rx.sta)
+ rx.sdata = rx.sta->sdata;
if (rx.sdata && ieee80211_is_data(hdr->frame_control)) {
rx.flags |= IEEE80211_RX_RA_MATCH;
prepares = prepare_for_handlers(rx.sdata, &rx, hdr);
- if (prepares)
- prev = rx.sdata;
+ if (prepares) {
+ if (status->flag & RX_FLAG_MMIC_ERROR) {
+ if (rx.flags & IEEE80211_RX_RA_MATCH)
+ ieee80211_rx_michael_mic_report(hdr, &rx);
+ } else
+ prev = rx.sdata;
+ }
} else list_for_each_entry_rcu(sdata, &local->interfaces, list) {
if (!netif_running(sdata->dev))
continue;
@@ -2183,6 +2407,13 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
if (!prepares)
continue;
+ if (status->flag & RX_FLAG_MMIC_ERROR) {
+ rx.sdata = sdata;
+ if (rx.flags & IEEE80211_RX_RA_MATCH)
+ ieee80211_rx_michael_mic_report(hdr, &rx);
+ continue;
+ }
+
/*
* frame is destined for this interface, but if it's not
* also for the previous one we handle that after the
@@ -2208,240 +2439,15 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
prev->dev->name);
continue;
}
- ieee80211_invoke_rx_handlers(prev, &rx, skb_new);
+ ieee80211_invoke_rx_handlers(prev, &rx, skb_new, rate);
prev = sdata;
}
if (prev)
- ieee80211_invoke_rx_handlers(prev, &rx, skb);
+ ieee80211_invoke_rx_handlers(prev, &rx, skb, rate);
else
dev_kfree_skb(skb);
}
-#define SEQ_MODULO 0x1000
-#define SEQ_MASK 0xfff
-
-static inline int seq_less(u16 sq1, u16 sq2)
-{
- return ((sq1 - sq2) & SEQ_MASK) > (SEQ_MODULO >> 1);
-}
-
-static inline u16 seq_inc(u16 sq)
-{
- return (sq + 1) & SEQ_MASK;
-}
-
-static inline u16 seq_sub(u16 sq1, u16 sq2)
-{
- return (sq1 - sq2) & SEQ_MASK;
-}
-
-
-static void ieee80211_release_reorder_frame(struct ieee80211_hw *hw,
- struct tid_ampdu_rx *tid_agg_rx,
- int index)
-{
- struct ieee80211_supported_band *sband;
- struct ieee80211_rate *rate;
- struct sk_buff *skb = tid_agg_rx->reorder_buf[index];
- struct ieee80211_rx_status *status;
-
- if (!skb)
- goto no_frame;
-
- status = IEEE80211_SKB_RXCB(skb);
-
- /* release the reordered frames to stack */
- sband = hw->wiphy->bands[status->band];
- if (status->flag & RX_FLAG_HT)
- rate = sband->bitrates; /* TODO: HT rates */
- else
- rate = &sband->bitrates[status->rate_idx];
- __ieee80211_rx_handle_packet(hw, skb, rate);
- tid_agg_rx->stored_mpdu_num--;
- tid_agg_rx->reorder_buf[index] = NULL;
-
-no_frame:
- tid_agg_rx->head_seq_num = seq_inc(tid_agg_rx->head_seq_num);
-}
-
-
-/*
- * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If
- * the skb was added to the buffer longer than this time ago, the earlier
- * frames that have not yet been received are assumed to be lost and the skb
- * can be released for processing. This may also release other skb's from the
- * reorder buffer if there are no additional gaps between the frames.
- */
-#define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10)
-
-/*
- * As it function blongs to Rx path it must be called with
- * the proper rcu_read_lock protection for its flow.
- */
-static u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw,
- struct tid_ampdu_rx *tid_agg_rx,
- struct sk_buff *skb,
- u16 mpdu_seq_num,
- int bar_req)
-{
- u16 head_seq_num, buf_size;
- int index;
-
- buf_size = tid_agg_rx->buf_size;
- head_seq_num = tid_agg_rx->head_seq_num;
-
- /* frame with out of date sequence number */
- if (seq_less(mpdu_seq_num, head_seq_num)) {
- dev_kfree_skb(skb);
- return 1;
- }
-
- /* if frame sequence number exceeds our buffering window size or
- * block Ack Request arrived - release stored frames */
- if ((!seq_less(mpdu_seq_num, head_seq_num + buf_size)) || (bar_req)) {
- /* new head to the ordering buffer */
- if (bar_req)
- head_seq_num = mpdu_seq_num;
- else
- head_seq_num =
- seq_inc(seq_sub(mpdu_seq_num, buf_size));
- /* release stored frames up to new head to stack */
- while (seq_less(tid_agg_rx->head_seq_num, head_seq_num)) {
- index = seq_sub(tid_agg_rx->head_seq_num,
- tid_agg_rx->ssn)
- % tid_agg_rx->buf_size;
- ieee80211_release_reorder_frame(hw, tid_agg_rx,
- index);
- }
- if (bar_req)
- return 1;
- }
-
- /* now the new frame is always in the range of the reordering */
- /* buffer window */
- index = seq_sub(mpdu_seq_num, tid_agg_rx->ssn)
- % tid_agg_rx->buf_size;
- /* check if we already stored this frame */
- if (tid_agg_rx->reorder_buf[index]) {
- dev_kfree_skb(skb);
- return 1;
- }
-
- /* if arrived mpdu is in the right order and nothing else stored */
- /* release it immediately */
- if (mpdu_seq_num == tid_agg_rx->head_seq_num &&
- tid_agg_rx->stored_mpdu_num == 0) {
- tid_agg_rx->head_seq_num =
- seq_inc(tid_agg_rx->head_seq_num);
- return 0;
- }
-
- /* put the frame in the reordering buffer */
- tid_agg_rx->reorder_buf[index] = skb;
- tid_agg_rx->reorder_time[index] = jiffies;
- tid_agg_rx->stored_mpdu_num++;
- /* release the buffer until next missing frame */
- index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn)
- % tid_agg_rx->buf_size;
- if (!tid_agg_rx->reorder_buf[index] &&
- tid_agg_rx->stored_mpdu_num > 1) {
- /*
- * No buffers ready to be released, but check whether any
- * frames in the reorder buffer have timed out.
- */
- int j;
- int skipped = 1;
- for (j = (index + 1) % tid_agg_rx->buf_size; j != index;
- j = (j + 1) % tid_agg_rx->buf_size) {
- if (tid_agg_rx->reorder_buf[j] == NULL) {
- skipped++;
- continue;
- }
- if (!time_after(jiffies, tid_agg_rx->reorder_time[j] +
- HZ / 10))
- break;
-
-#ifdef CONFIG_MAC80211_HT_DEBUG
- if (net_ratelimit())
- printk(KERN_DEBUG "%s: release an RX reorder "
- "frame due to timeout on earlier "
- "frames\n",
- wiphy_name(hw->wiphy));
-#endif
- ieee80211_release_reorder_frame(hw, tid_agg_rx, j);
-
- /*
- * Increment the head seq# also for the skipped slots.
- */
- tid_agg_rx->head_seq_num =
- (tid_agg_rx->head_seq_num + skipped) &
- SEQ_MASK;
- skipped = 0;
- }
- } else while (tid_agg_rx->reorder_buf[index]) {
- ieee80211_release_reorder_frame(hw, tid_agg_rx, index);
- index = seq_sub(tid_agg_rx->head_seq_num,
- tid_agg_rx->ssn) % tid_agg_rx->buf_size;
- }
- return 1;
-}
-
-static u8 ieee80211_rx_reorder_ampdu(struct ieee80211_local *local,
- struct sk_buff *skb)
-{
- struct ieee80211_hw *hw = &local->hw;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- struct sta_info *sta;
- struct tid_ampdu_rx *tid_agg_rx;
- u16 sc;
- u16 mpdu_seq_num;
- u8 ret = 0;
- int tid;
-
- sta = sta_info_get(local, hdr->addr2);
- if (!sta)
- return ret;
-
- /* filter the QoS data rx stream according to
- * STA/TID and check if this STA/TID is on aggregation */
- if (!ieee80211_is_data_qos(hdr->frame_control))
- goto end_reorder;
-
- tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
-
- if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_OPERATIONAL)
- goto end_reorder;
-
- tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
-
- /* qos null data frames are excluded */
- if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC)))
- goto end_reorder;
-
- /* new un-ordered ampdu frame - process it */
-
- /* reset session timer */
- if (tid_agg_rx->timeout)
- mod_timer(&tid_agg_rx->session_timer,
- TU_TO_EXP_TIME(tid_agg_rx->timeout));
-
- /* if this mpdu is fragmented - terminate rx aggregation session */
- sc = le16_to_cpu(hdr->seq_ctrl);
- if (sc & IEEE80211_SCTL_FRAG) {
- ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->sta.addr,
- tid, 0, WLAN_REASON_QSTA_REQUIRE_SETUP);
- ret = 1;
- goto end_reorder;
- }
-
- /* according to mpdu sequence number deal with reordering buffer */
- mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4;
- ret = ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, skb,
- mpdu_seq_num, 0);
- end_reorder:
- return ret;
-}
-
/*
* This is the receive path handler. It is called by a low level driver when an
* 802.11 MPDU is received from the hardware.
@@ -2481,14 +2487,22 @@ void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb)
goto drop;
if (status->flag & RX_FLAG_HT) {
- /* rate_idx is MCS index */
- if (WARN_ON(status->rate_idx < 0 ||
- status->rate_idx >= 76))
+ /*
+ * rate_idx is MCS index, which can be [0-76] as documented on:
+ *
+ * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n
+ *
+ * Anything else would be some sort of driver or hardware error.
+ * The driver should catch hardware errors.
+ */
+ if (WARN((status->rate_idx < 0 ||
+ status->rate_idx > 76),
+ "Rate marked as an HT rate but passed "
+ "status->rate_idx is not "
+ "an MCS index [0-76]: %d (0x%02x)\n",
+ status->rate_idx,
+ status->rate_idx))
goto drop;
- /* HT rates are not in the table - use the highest legacy rate
- * for now since other parts of mac80211 may not yet be fully
- * MCS aware. */
- rate = &sband->bitrates[sband->n_bitrates - 1];
} else {
if (WARN_ON(status->rate_idx < 0 ||
status->rate_idx >= sband->n_bitrates))
@@ -2515,20 +2529,7 @@ void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb)
return;
}
- /*
- * In theory, the block ack reordering should happen after duplicate
- * removal (ieee80211_rx_h_check(), which is an RX handler). As such,
- * the call to ieee80211_rx_reorder_ampdu() should really be moved to
- * happen as a new RX handler between ieee80211_rx_h_check and
- * ieee80211_rx_h_decrypt. This cleanup may eventually happen, but for
- * the time being, the call can be here since RX reorder buf processing
- * will implicitly skip duplicates. We could, in theory at least,
- * process frames that ieee80211_rx_h_passive_scan would drop (e.g.,
- * frames from other than operational channel), but that should not
- * happen in normal networks.
- */
- if (!ieee80211_rx_reorder_ampdu(local, skb))
- __ieee80211_rx_handle_packet(hw, skb, rate);
+ __ieee80211_rx_handle_packet(hw, skb, rate);
rcu_read_unlock();
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 05:42:08 +0000