* 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 2007-2010 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
#include <net/ieee80211_radiotap.h>
#include "ieee80211_i.h"
-#include "ieee80211_led.h"
+#include "driver-ops.h"
+#include "led.h"
#include "mesh.h"
#include "wep.h"
#include "wpa.h"
#include "tkip.h"
#include "wme.h"
-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
*
* 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);
+ __pskb_trim(skb, skb->len - FCS_LEN);
else {
/* driver bug */
WARN_ON(1);
return skb;
}
-static inline int should_drop_frame(struct ieee80211_rx_status *status,
- struct sk_buff *skb,
- int present_fcs_len,
- int radiotap_len)
+static inline int should_drop_frame(struct sk_buff *skb,
+ int present_fcs_len)
{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ 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 (((hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
- cpu_to_le16(IEEE80211_FTYPE_CTL)) &&
- ((hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE)) !=
- cpu_to_le16(IEEE80211_STYPE_PSPOLL)) &&
- ((hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE)) !=
- cpu_to_le16(IEEE80211_STYPE_BACK_REQ)))
+ if (ieee80211_is_ctl(hdr->frame_control) &&
+ !ieee80211_is_pspoll(hdr->frame_control) &&
+ !ieee80211_is_back_req(hdr->frame_control))
return 1;
return 0;
}
+static int
+ieee80211_rx_radiotap_len(struct ieee80211_local *local,
+ struct ieee80211_rx_status *status)
+{
+ int len;
+
+ /* always present fields */
+ len = sizeof(struct ieee80211_radiotap_header) + 9;
+
+ if (status->flag & RX_FLAG_TSFT)
+ len += 8;
+ if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
+ len += 1;
+ if (local->hw.flags & IEEE80211_HW_NOISE_DBM)
+ len += 1;
+
+ if (len & 1) /* padding for RX_FLAGS if necessary */
+ len++;
+
+ return len;
+}
+
+/*
+ * ieee80211_add_rx_radiotap_header - add radiotap header
+ *
+ * add a radiotap header containing all the fields which the hardware provided.
+ */
+static void
+ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
+ struct sk_buff *skb,
+ struct ieee80211_rate *rate,
+ int rtap_len)
+{
+ 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);
+
+ /* radiotap header, set always present flags */
+ rthdr->it_present =
+ cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
+ (1 << IEEE80211_RADIOTAP_CHANNEL) |
+ (1 << IEEE80211_RADIOTAP_ANTENNA) |
+ (1 << IEEE80211_RADIOTAP_RX_FLAGS));
+ rthdr->it_len = cpu_to_le16(rtap_len);
+
+ pos = (unsigned char *)(rthdr+1);
+
+ /* the order of the following fields is important */
+
+ /* IEEE80211_RADIOTAP_TSFT */
+ if (status->flag & RX_FLAG_TSFT) {
+ put_unaligned_le64(status->mactime, pos);
+ rthdr->it_present |=
+ cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT);
+ pos += 8;
+ }
+
+ /* IEEE80211_RADIOTAP_FLAGS */
+ if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
+ *pos |= IEEE80211_RADIOTAP_F_FCS;
+ if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC))
+ *pos |= IEEE80211_RADIOTAP_F_BADFCS;
+ if (status->flag & RX_FLAG_SHORTPRE)
+ *pos |= IEEE80211_RADIOTAP_F_SHORTPRE;
+ pos++;
+
+ /* IEEE80211_RADIOTAP_RATE */
+ if (status->flag & RX_FLAG_HT) {
+ /*
+ * TODO: add following information into radiotap header once
+ * suitable fields are defined for it:
+ * - MCS index (status->rate_idx)
+ * - HT40 (status->flag & RX_FLAG_40MHZ)
+ * - short-GI (status->flag & RX_FLAG_SHORT_GI)
+ */
+ *pos = 0;
+ } else {
+ rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
+ *pos = rate->bitrate / 5;
+ }
+ pos++;
+
+ /* IEEE80211_RADIOTAP_CHANNEL */
+ put_unaligned_le16(status->freq, pos);
+ pos += 2;
+ if (status->band == IEEE80211_BAND_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)
+ put_unaligned_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ,
+ pos);
+ else
+ put_unaligned_le16(IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ,
+ pos);
+ pos += 2;
+
+ /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */
+ if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
+ *pos = status->signal;
+ rthdr->it_present |=
+ cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL);
+ pos++;
+ }
+
+ /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */
+
+ /* IEEE80211_RADIOTAP_ANTENNA */
+ *pos = status->antenna;
+ pos++;
+
+ /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */
+
+ /* IEEE80211_RADIOTAP_RX_FLAGS */
+ /* ensure 2 byte alignment for the 2 byte field as required */
+ if ((pos - (u8 *)rthdr) & 1)
+ pos++;
+ if (status->flag & RX_FLAG_FAILED_PLCP_CRC)
+ rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP;
+ put_unaligned_le16(rx_flags, pos);
+ pos += 2;
+}
+
/*
* This function copies a received frame to all monitor interfaces and
* returns a cleaned-up SKB that no longer includes the FCS nor the
*/
static struct sk_buff *
ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb,
- struct ieee80211_rx_status *status,
struct ieee80211_rate *rate)
{
+ struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb);
struct ieee80211_sub_if_data *sdata;
int needed_headroom = 0;
- struct ieee80211_radiotap_header *rthdr;
- __le64 *rttsft = NULL;
- struct ieee80211_rtap_fixed_data {
- u8 flags;
- u8 rate;
- __le16 chan_freq;
- __le16 chan_flags;
- u8 antsignal;
- u8 padding_for_rxflags;
- __le16 rx_flags;
- } __attribute__ ((packed)) *rtfixed;
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
* 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 radiotap header, always present fields and TSFT */
- needed_headroom = sizeof(*rthdr) + sizeof(*rtfixed) + 8;
+
+ /* 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;
+ /* make sure hdr->frame_control is on the linear part */
+ if (!pskb_may_pull(origskb, 2)) {
+ dev_kfree_skb(origskb);
+ return NULL;
+ }
+
if (!local->monitors) {
- if (should_drop_frame(status, 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(status, 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;
*/
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)) {
- rtfixed = (void *) skb_push(skb, sizeof(*rtfixed));
- rtap_len = sizeof(*rthdr) + sizeof(*rtfixed);
- if (status->flag & RX_FLAG_TSFT) {
- rttsft = (void *) skb_push(skb, sizeof(*rttsft));
- rtap_len += 8;
- }
- rthdr = (void *) skb_push(skb, sizeof(*rthdr));
- memset(rthdr, 0, sizeof(*rthdr));
- memset(rtfixed, 0, sizeof(*rtfixed));
- rthdr->it_present =
- cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
- (1 << IEEE80211_RADIOTAP_RATE) |
- (1 << IEEE80211_RADIOTAP_CHANNEL) |
- (1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL) |
- (1 << IEEE80211_RADIOTAP_RX_FLAGS));
- rtfixed->flags = 0;
- if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
- rtfixed->flags |= IEEE80211_RADIOTAP_F_FCS;
-
- if (rttsft) {
- *rttsft = cpu_to_le64(status->mactime);
- rthdr->it_present |=
- cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT);
- }
-
- /* FIXME: when radiotap gets a 'bad PLCP' flag use it here */
- rtfixed->rx_flags = 0;
- if (status->flag &
- (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC))
- rtfixed->rx_flags |=
- cpu_to_le16(IEEE80211_RADIOTAP_F_RX_BADFCS);
-
- rtfixed->rate = rate->bitrate / 5;
-
- rtfixed->chan_freq = cpu_to_le16(status->freq);
-
- if (status->band == IEEE80211_BAND_5GHZ)
- rtfixed->chan_flags =
- cpu_to_le16(IEEE80211_CHAN_OFDM |
- IEEE80211_CHAN_5GHZ);
- else
- rtfixed->chan_flags =
- cpu_to_le16(IEEE80211_CHAN_DYN |
- IEEE80211_CHAN_2GHZ);
-
- rtfixed->antsignal = status->ssi;
- rthdr->it_len = cpu_to_le16(rtap_len);
- }
+ /* prepend radiotap information */
+ ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom);
skb_reset_mac_header(skb);
skb->ip_summed = CHECKSUM_UNNECESSARY;
skb->protocol = htons(ETH_P_802_2);
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
- if (!netif_running(sdata->dev))
+ if (sdata->vif.type != NL80211_IFTYPE_MONITOR)
continue;
- if (sdata->vif.type != IEEE80211_IF_TYPE_MNTR)
+ if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)
continue;
- if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)
+ if (!ieee80211_sdata_running(sdata))
continue;
if (prev_dev) {
static void ieee80211_parse_qos(struct ieee80211_rx_data *rx)
{
- u8 *data = rx->skb->data;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
int tid;
/* does the frame have a qos control field? */
- if (WLAN_FC_IS_QOS_DATA(rx->fc)) {
- u8 *qc = data + ieee80211_get_hdrlen(rx->fc) - QOS_CONTROL_LEN;
+ if (ieee80211_is_data_qos(hdr->frame_control)) {
+ u8 *qc = ieee80211_get_qos_ctl(hdr);
/* frame has qos control */
- tid = qc[0] & QOS_CONTROL_TID_MASK;
- if (qc[0] & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT)
+ tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
+ if (*qc & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT)
rx->flags |= IEEE80211_RX_AMSDU;
else
rx->flags &= ~IEEE80211_RX_AMSDU;
} else {
- if (unlikely((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)) {
- /* Separate TID for management frames */
- tid = NUM_RX_DATA_QUEUES - 1;
- } else {
- /* no qos control present */
- tid = 0; /* 802.1d - Best Effort */
- }
+ /*
+ * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"):
+ *
+ * Sequence numbers for management frames, QoS data
+ * frames with a broadcast/multicast address in the
+ * Address 1 field, and all non-QoS data frames sent
+ * by QoS STAs are assigned using an additional single
+ * modulo-4096 counter, [...]
+ *
+ * We also use that counter for non-QoS STAs.
+ */
+ tid = NUM_RX_DATA_QUEUES - 1;
}
- I802_DEBUG_INC(rx->local->wme_rx_queue[tid]);
- /* only a debug counter, sta might not be assigned properly yet */
- if (rx->sta)
- I802_DEBUG_INC(rx->sta->wme_rx_queue[tid]);
-
rx->queue = tid;
/* Set skb->priority to 1d tag if highest order bit of TID is not set.
* For now, set skb->priority to 0 for other cases. */
rx->skb->priority = (tid > 7) ? 0 : tid;
}
-static void ieee80211_verify_ip_alignment(struct ieee80211_rx_data *rx)
+/**
+ * DOC: Packet alignment
+ *
+ * Drivers always need to pass packets that are aligned to two-byte boundaries
+ * to the stack.
+ *
+ * Additionally, should, if possible, align the payload data in a way that
+ * guarantees that the contained IP header is aligned to a four-byte
+ * boundary. In the case of regular frames, this simply means aligning the
+ * payload to a four-byte boundary (because either the IP header is directly
+ * contained, or IV/RFC1042 headers that have a length divisible by four are
+ * in front of it). If the payload data is not properly aligned and the
+ * architecture doesn't support efficient unaligned operations, mac80211
+ * will align the data.
+ *
+ * With A-MSDU frames, however, the payload data address must yield two modulo
+ * four because there are 14-byte 802.3 headers within the A-MSDU frames that
+ * push the IP header further back to a multiple of four again. Thankfully, the
+ * specs were sane enough this time around to require padding each A-MSDU
+ * subframe to a length that is a multiple of four.
+ *
+ * Padding like Atheros hardware adds which is inbetween the 802.11 header and
+ * the payload is not supported, the driver is required to move the 802.11
+ * header to be directly in front of the payload in that case.
+ */
+static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx)
{
-#ifdef CONFIG_MAC80211_DEBUG_PACKET_ALIGNMENT
- int hdrlen;
-
- if (!WLAN_FC_DATA_PRESENT(rx->fc))
- return;
-
- /*
- * Drivers are required to align the payload data in a way that
- * guarantees that the contained IP header is aligned to a four-
- * byte boundary. In the case of regular frames, this simply means
- * aligning the payload to a four-byte boundary (because either
- * the IP header is directly contained, or IV/RFC1042 headers that
- * have a length divisible by four are in front of it.
- *
- * With A-MSDU frames, however, the payload data address must
- * yield two modulo four because there are 14-byte 802.3 headers
- * within the A-MSDU frames that push the IP header further back
- * to a multiple of four again. Thankfully, the specs were sane
- * enough this time around to require padding each A-MSDU subframe
- * to a length that is a multiple of four.
- *
- * Padding like atheros hardware adds which is inbetween the 802.11
- * header and the payload is not supported, the driver is required
- * to move the 802.11 header further back in that case.
- */
- hdrlen = ieee80211_get_hdrlen(rx->fc);
- if (rx->flags & IEEE80211_RX_AMSDU)
- hdrlen += ETH_HLEN;
- WARN_ON_ONCE(((unsigned long)(rx->skb->data + hdrlen)) & 3);
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+ WARN_ONCE((unsigned long)rx->skb->data & 1,
+ "unaligned packet at 0x%p\n", rx->skb->data);
#endif
}
-static u32 ieee80211_rx_load_stats(struct ieee80211_local *local,
- struct sk_buff *skb,
- struct ieee80211_rx_status *status,
- struct ieee80211_rate *rate)
-{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- u32 load = 0, hdrtime;
-
- /* Estimate total channel use caused by this frame */
-
- /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values,
- * 1 usec = 1/8 * (1080 / 10) = 13.5 */
-
- if (status->band == IEEE80211_BAND_5GHZ ||
- (status->band == IEEE80211_BAND_5GHZ &&
- rate->flags & IEEE80211_RATE_ERP_G))
- hdrtime = CHAN_UTIL_HDR_SHORT;
- else
- hdrtime = CHAN_UTIL_HDR_LONG;
-
- load = hdrtime;
- if (!is_multicast_ether_addr(hdr->addr1))
- load += hdrtime;
-
- /* TODO: optimise again */
- load += skb->len * CHAN_UTIL_RATE_LCM / rate->bitrate;
-
- /* Divide channel_use by 8 to avoid wrapping around the counter */
- load >>= CHAN_UTIL_SHIFT;
-
- return load;
-}
-
/* rx handlers */
-static ieee80211_rx_result
-ieee80211_rx_h_if_stats(struct ieee80211_rx_data *rx)
-{
- if (rx->sta)
- rx->sta->channel_use_raw += rx->load;
- rx->sdata->channel_use_raw += rx->load;
- return RX_CONTINUE;
-}
-
-static ieee80211_rx_result
+static ieee80211_rx_result debug_noinline
ieee80211_rx_h_passive_scan(struct ieee80211_rx_data *rx)
{
struct ieee80211_local *local = rx->local;
struct sk_buff *skb = rx->skb;
- if (unlikely(local->sta_hw_scanning))
- return ieee80211_sta_rx_scan(rx->dev, skb, rx->status);
+ if (unlikely(test_bit(SCAN_HW_SCANNING, &local->scanning)))
+ return ieee80211_scan_rx(rx->sdata, skb);
- if (unlikely(local->sta_sw_scanning)) {
+ if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning) &&
+ (rx->flags & IEEE80211_RX_IN_SCAN))) {
/* drop all the other packets during a software scan anyway */
- if (ieee80211_sta_rx_scan(rx->dev, skb, rx->status)
- != RX_QUEUED)
+ if (ieee80211_scan_rx(rx->sdata, skb) != RX_QUEUED)
dev_kfree_skb(skb);
return RX_QUEUED;
}
return RX_CONTINUE;
}
-static ieee80211_rx_result
-ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
+
+static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb)
{
- int hdrlen = ieee80211_get_hdrlen(rx->fc);
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
-#define msh_h_get(h, l) ((struct ieee80211s_hdr *) ((u8 *)h + l))
+ if (skb->len < 24 || is_multicast_ether_addr(hdr->addr1))
+ return 0;
- if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) {
- if (!((rx->fc & IEEE80211_FCTL_FROMDS) &&
- (rx->fc & IEEE80211_FCTL_TODS)))
- return RX_DROP_MONITOR;
- if (memcmp(hdr->addr4, rx->dev->dev_addr, ETH_ALEN) == 0)
- return RX_DROP_MONITOR;
+ return ieee80211_is_robust_mgmt_frame(hdr);
+}
+
+
+static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb)
+{
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+
+ if (skb->len < 24 || !is_multicast_ether_addr(hdr->addr1))
+ return 0;
+
+ return ieee80211_is_robust_mgmt_frame(hdr);
+}
+
+
+/* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */
+static int ieee80211_get_mmie_keyidx(struct sk_buff *skb)
+{
+ struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data;
+ struct ieee80211_mmie *mmie;
+
+ if (skb->len < 24 + sizeof(*mmie) ||
+ !is_multicast_ether_addr(hdr->da))
+ return -1;
+
+ if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) hdr))
+ return -1; /* not a robust management frame */
+
+ mmie = (struct ieee80211_mmie *)
+ (skb->data + skb->len - sizeof(*mmie));
+ if (mmie->element_id != WLAN_EID_MMIE ||
+ mmie->length != sizeof(*mmie) - 2)
+ return -1;
+
+ return le16_to_cpu(mmie->key_id);
+}
+
+
+static ieee80211_rx_result
+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->sdata->vif.addr;
+
+ if (ieee80211_is_data(hdr->frame_control)) {
+ if (is_multicast_ether_addr(hdr->addr1)) {
+ if (ieee80211_has_tods(hdr->frame_control) ||
+ !ieee80211_has_fromds(hdr->frame_control))
+ return RX_DROP_MONITOR;
+ if (memcmp(hdr->addr3, dev_addr, ETH_ALEN) == 0)
+ return RX_DROP_MONITOR;
+ } else {
+ if (!ieee80211_has_a4(hdr->frame_control))
+ return RX_DROP_MONITOR;
+ if (memcmp(hdr->addr4, dev_addr, ETH_ALEN) == 0)
+ return RX_DROP_MONITOR;
+ }
}
/* If there is not an established peer link and this is not a peer link
if (!rx->sta || sta_plink_state(rx->sta) != PLINK_ESTAB) {
struct ieee80211_mgmt *mgmt;
- if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT)
+ if (!ieee80211_is_mgmt(hdr->frame_control))
return RX_DROP_MONITOR;
- switch (rx->fc & IEEE80211_FCTL_STYPE) {
- case IEEE80211_STYPE_ACTION:
+ if (ieee80211_is_action(hdr->frame_control)) {
mgmt = (struct ieee80211_mgmt *)hdr;
- if (mgmt->u.action.category != PLINK_CATEGORY)
+ if (mgmt->u.action.category != WLAN_CATEGORY_MESH_PLINK)
return RX_DROP_MONITOR;
- /* fall through on else */
- case IEEE80211_STYPE_PROBE_REQ:
- case IEEE80211_STYPE_PROBE_RESP:
- case IEEE80211_STYPE_BEACON:
return RX_CONTINUE;
- break;
- default:
- return RX_DROP_MONITOR;
}
- } else if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
- is_broadcast_ether_addr(hdr->addr1) &&
- mesh_rmc_check(hdr->addr4, msh_h_get(hdr, hdrlen), rx->dev))
+ if (ieee80211_is_probe_req(hdr->frame_control) ||
+ ieee80211_is_probe_resp(hdr->frame_control) ||
+ ieee80211_is_beacon(hdr->frame_control))
+ return RX_CONTINUE;
+
+ return RX_DROP_MONITOR;
+
+ }
+
+#define msh_h_get(h, l) ((struct ieee80211s_hdr *) ((u8 *)h + l))
+
+ if (ieee80211_is_data(hdr->frame_control) &&
+ is_multicast_ether_addr(hdr->addr1) &&
+ mesh_rmc_check(hdr->addr3, msh_h_get(hdr, hdrlen), rx->sdata))
return RX_DROP_MONITOR;
#undef msh_h_get
return RX_CONTINUE;
}
+#define SEQ_MODULO 0x1000
+#define SEQ_MASK 0xfff
-static ieee80211_rx_result
-ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
+static inline int seq_less(u16 sq1, u16 sq2)
{
- struct ieee80211_hdr *hdr;
+ 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;
+
+ spin_lock(&sta->lock);
- hdr = (struct ieee80211_hdr *) rx->skb->data;
+ if (!sta->ampdu_mlme.tid_active_rx[tid])
+ goto dont_reorder_unlock;
+
+ 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_unlock;
+
+ /* 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) {
+ spin_unlock(&sta->lock);
+ __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
+ WLAN_REASON_QSTA_REQUIRE_SETUP);
+ dev_kfree_skb(skb);
+ return;
+ }
+
+ if (ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, skb, frames)) {
+ spin_unlock(&sta->lock);
+ return;
+ }
+
+ dont_reorder_unlock:
+ spin_unlock(&sta->lock);
+ dont_reorder:
+ __skb_queue_tail(frames, skb);
+}
+
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
+{
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
/* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */
if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) {
- if (unlikely(rx->fc & IEEE80211_FCTL_RETRY &&
+ if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
rx->sta->last_seq_ctrl[rx->queue] ==
hdr->seq_ctrl)) {
if (rx->flags & IEEE80211_RX_RA_MATCH) {
/* Drop disallowed frame classes based on STA auth/assoc state;
* IEEE 802.11, Chap 5.5.
*
- * 80211.o does filtering only based on association state, i.e., it
- * drops Class 3 frames from not associated stations. hostapd sends
+ * mac80211 filters only based on association state, i.e. it drops
+ * Class 3 frames from not associated stations. hostapd sends
* deauth/disassoc frames when needed. In addition, hostapd is
* responsible for filtering on both auth and assoc states.
*/
if (ieee80211_vif_is_mesh(&rx->sdata->vif))
return ieee80211_rx_mesh_check(rx);
- if (unlikely(((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA ||
- ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL &&
- (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)) &&
- rx->sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
- (!rx->sta || !(rx->sta->flags & WLAN_STA_ASSOC)))) {
- if ((!(rx->fc & IEEE80211_FCTL_FROMDS) &&
- !(rx->fc & IEEE80211_FCTL_TODS) &&
- (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)
- || !(rx->flags & IEEE80211_RX_RA_MATCH)) {
+ if (unlikely((ieee80211_is_data(hdr->frame_control) ||
+ ieee80211_is_pspoll(hdr->frame_control)) &&
+ rx->sdata->vif.type != NL80211_IFTYPE_ADHOC &&
+ (!rx->sta || !test_sta_flags(rx->sta, WLAN_STA_ASSOC)))) {
+ if ((!ieee80211_has_fromds(hdr->frame_control) &&
+ !ieee80211_has_tods(hdr->frame_control) &&
+ ieee80211_is_data(hdr->frame_control)) ||
+ !(rx->flags & IEEE80211_RX_RA_MATCH)) {
/* Drop IBSS frames and frames for other hosts
* silently. */
return RX_DROP_MONITOR;
}
-static ieee80211_rx_result
+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;
int keyidx;
int hdrlen;
ieee80211_rx_result result = RX_DROP_UNUSABLE;
struct ieee80211_key *stakey = NULL;
+ int mmie_keyidx = -1;
/*
* Key selection 101
*
- * There are three types of keys:
+ * There are four types of keys:
* - GTK (group keys)
+ * - IGTK (group keys for management frames)
* - PTK (pairwise keys)
* - STK (station-to-station pairwise keys)
*
* When selecting a key, we have to distinguish between multicast
* (including broadcast) and unicast frames, the latter can only
- * use PTKs and STKs while the former always use GTKs. Unless, of
- * course, actual WEP keys ("pre-RSNA") are used, then unicast
- * frames can also use key indizes like GTKs. Hence, if we don't
- * have a PTK/STK we check the key index for a WEP key.
+ * use PTKs and STKs while the former always use GTKs and IGTKs.
+ * Unless, of course, actual WEP keys ("pre-RSNA") are used, then
+ * unicast frames can also use key indices like GTKs. Hence, if we
+ * don't have a PTK/STK we check the key index for a WEP key.
*
* Note that in a regular BSS, multicast frames are sent by the
* AP only, associated stations unicast the frame to the AP first
* possible.
*/
- if (!(rx->fc & IEEE80211_FCTL_PROTECTED))
- return RX_CONTINUE;
-
/*
* No point in finding a key and decrypting if the frame is neither
* addressed to us nor a multicast frame.
if (!(rx->flags & IEEE80211_RX_RA_MATCH))
return RX_CONTINUE;
+ if (skb_linearize(rx->skb))
+ return RX_DROP_UNUSABLE;
+
+ hdr = (struct ieee80211_hdr *)skb->data;
+
+ /* start without a key */
+ rx->key = NULL;
+
if (rx->sta)
stakey = rcu_dereference(rx->sta->key);
+ if (!ieee80211_has_protected(hdr->frame_control))
+ mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb);
+
if (!is_multicast_ether_addr(hdr->addr1) && stakey) {
rx->key = stakey;
+ /* Skip decryption if the frame is not protected. */
+ if (!ieee80211_has_protected(hdr->frame_control))
+ return RX_CONTINUE;
+ } else if (mmie_keyidx >= 0) {
+ /* Broadcast/multicast robust management frame / BIP */
+ if ((status->flag & RX_FLAG_DECRYPTED) &&
+ (status->flag & RX_FLAG_IV_STRIPPED))
+ return RX_CONTINUE;
+
+ if (mmie_keyidx < NUM_DEFAULT_KEYS ||
+ mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
+ return RX_DROP_MONITOR; /* unexpected BIP keyidx */
+ rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]);
+ } else if (!ieee80211_has_protected(hdr->frame_control)) {
+ /*
+ * The frame was not protected, so skip decryption. However, we
+ * need to set rx->key if there is a key that could have been
+ * used so that the frame may be dropped if encryption would
+ * have been expected.
+ */
+ struct ieee80211_key *key = NULL;
+ if (ieee80211_is_mgmt(hdr->frame_control) &&
+ is_multicast_ether_addr(hdr->addr1) &&
+ (key = rcu_dereference(rx->sdata->default_mgmt_key)))
+ rx->key = key;
+ else if ((key = rcu_dereference(rx->sdata->default_key)))
+ rx->key = key;
+ return RX_CONTINUE;
} else {
/*
* The device doesn't give us the IV so we won't be
* 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_get_hdrlen(rx->fc);
+ hdrlen = ieee80211_hdrlen(hdr->frame_control);
if (rx->skb->len < 8 + hdrlen)
return RX_DROP_UNUSABLE; /* TODO: count this? */
rx->key->tx_rx_count++;
/* TODO: add threshold stuff again */
} else {
-#ifdef CONFIG_MAC80211_DEBUG
- if (net_ratelimit())
- printk(KERN_DEBUG "%s: RX protected frame,"
- " but have no key\n", rx->dev->name);
-#endif /* CONFIG_MAC80211_DEBUG */
return RX_DROP_MONITOR;
}
/* Check for weak IVs if possible */
if (rx->sta && rx->key->conf.alg == ALG_WEP &&
- ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
- (!(rx->status->flag & RX_FLAG_IV_STRIPPED) ||
- !(rx->status->flag & RX_FLAG_DECRYPTED)) &&
+ ieee80211_is_data(hdr->frame_control) &&
+ (!(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++;
case ALG_CCMP:
result = ieee80211_crypto_ccmp_decrypt(rx);
break;
+ case ALG_AES_CMAC:
+ result = ieee80211_crypto_aes_cmac_decrypt(rx);
+ break;
}
/* either the frame has been decrypted or will be dropped */
- rx->status->flag |= RX_FLAG_DECRYPTED;
+ status->flag |= RX_FLAG_DECRYPTED;
return result;
}
-static void ap_sta_ps_start(struct net_device *dev, struct sta_info *sta)
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx)
{
- struct ieee80211_sub_if_data *sdata;
- DECLARE_MAC_BUF(mac);
+ struct ieee80211_local *local;
+ struct ieee80211_hdr *hdr;
+ struct sk_buff *skb;
- sdata = sta->sdata;
+ local = rx->local;
+ skb = rx->skb;
+ hdr = (struct ieee80211_hdr *) skb->data;
- if (sdata->bss)
- atomic_inc(&sdata->bss->num_sta_ps);
- sta->flags |= WLAN_STA_PS;
- sta->flags &= ~WLAN_STA_PSPOLL;
-#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
- printk(KERN_DEBUG "%s: STA %s aid %d enters power save mode\n",
- dev->name, print_mac(mac, sta->addr), sta->aid);
-#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
+ if (!local->pspolling)
+ return RX_CONTINUE;
+
+ if (!ieee80211_has_fromds(hdr->frame_control))
+ /* this is not from AP */
+ return RX_CONTINUE;
+
+ if (!ieee80211_is_data(hdr->frame_control))
+ return RX_CONTINUE;
+
+ if (!ieee80211_has_moredata(hdr->frame_control)) {
+ /* AP has no more frames buffered for us */
+ local->pspolling = false;
+ return RX_CONTINUE;
+ }
+
+ /* more data bit is set, let's request a new frame from the AP */
+ ieee80211_send_pspoll(local, rx->sdata);
+
+ return RX_CONTINUE;
}
-static int ap_sta_ps_end(struct net_device *dev, struct sta_info *sta)
+static void ap_sta_ps_start(struct sta_info *sta)
{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct sk_buff *skb;
- int sent = 0;
- struct ieee80211_sub_if_data *sdata;
- struct ieee80211_tx_packet_data *pkt_data;
- DECLARE_MAC_BUF(mac);
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+ struct ieee80211_local *local = sdata->local;
- sdata = sta->sdata;
+ atomic_inc(&sdata->bss->num_sta_ps);
+ set_sta_flags(sta, WLAN_STA_PS_STA);
+ drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta);
+#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
+ printk(KERN_DEBUG "%s: STA %pM aid %d enters power save mode\n",
+ sdata->name, sta->sta.addr, sta->sta.aid);
+#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
+}
- if (sdata->bss)
- atomic_dec(&sdata->bss->num_sta_ps);
+static void ap_sta_ps_end(struct sta_info *sta)
+{
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
- sta->flags &= ~(WLAN_STA_PS | WLAN_STA_PSPOLL);
+ atomic_dec(&sdata->bss->num_sta_ps);
- 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 %s aid %d exits power save mode\n",
- dev->name, print_mac(mac, sta->addr), sta->aid);
+ printk(KERN_DEBUG "%s: STA %pM aid %d exits power save mode\n",
+ sdata->name, sta->sta.addr, sta->sta.aid);
#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
- /* Send all buffered frames to the station */
- while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) {
- pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
- sent++;
- pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
- dev_queue_xmit(skb);
- }
- while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) {
- pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
- local->total_ps_buffered--;
- sent++;
+ if (test_sta_flags(sta, WLAN_STA_PS_DRIVER)) {
#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
- printk(KERN_DEBUG "%s: STA %s aid %d send PS frame "
- "since STA not sleeping anymore\n", dev->name,
- print_mac(mac, sta->addr), sta->aid);
+ printk(KERN_DEBUG "%s: STA %pM aid %d driver-ps-blocked\n",
+ sdata->name, sta->sta.addr, sta->sta.aid);
#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
- pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
- dev_queue_xmit(skb);
+ return;
}
- return sent;
+ ieee80211_sta_ps_deliver_wakeup(sta);
}
-static ieee80211_rx_result
+static ieee80211_rx_result debug_noinline
ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
{
struct sta_info *sta = rx->sta;
- struct net_device *dev = rx->dev;
- 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;
- /* Update last_rx only for IBSS packets which are for the current
- * BSSID to avoid keeping the current IBSS network alive in cases where
- * other STAs are using different BSSID. */
- if (rx->sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
+ /*
+ * Update last_rx only for IBSS packets which are for the current
+ * BSSID to avoid keeping the current IBSS network alive in cases
+ * where other STAs start using different BSSID.
+ */
+ if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) {
u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len,
- IEEE80211_IF_TYPE_IBSS);
- if (compare_ether_addr(bssid, rx->sdata->u.sta.bssid) == 0)
+ NL80211_IFTYPE_ADHOC);
+ if (compare_ether_addr(bssid, rx->sdata->u.ibss.bssid) == 0)
sta->last_rx = jiffies;
- } else
- if (!is_multicast_ether_addr(hdr->addr1) ||
- rx->sdata->vif.type == IEEE80211_IF_TYPE_STA) {
- /* Update last_rx only for unicast frames in order to prevent
- * the Probe Request frames (the only broadcast frames from a
- * STA in infrastructure mode) from keeping a connection alive.
+ } else if (!is_multicast_ether_addr(hdr->addr1)) {
+ /*
* Mesh beacons will update last_rx when if they are found to
* match the current local configuration when processed.
*/
if (!(rx->flags & IEEE80211_RX_RA_MATCH))
return RX_CONTINUE;
+ if (rx->sdata->vif.type == NL80211_IFTYPE_STATION)
+ ieee80211_sta_rx_notify(rx->sdata, hdr);
+
sta->rx_fragments++;
sta->rx_bytes += rx->skb->len;
- sta->last_rssi = rx->status->ssi;
- sta->last_signal = rx->status->signal;
- sta->last_noise = rx->status->noise;
-
- if (!(rx->fc & IEEE80211_FCTL_MOREFRAGS)) {
- /* Change STA power saving mode only in the end of a frame
- * exchange sequence */
- if ((sta->flags & WLAN_STA_PS) && !(rx->fc & IEEE80211_FCTL_PM))
- rx->sent_ps_buffered += ap_sta_ps_end(dev, sta);
- else if (!(sta->flags & WLAN_STA_PS) &&
- (rx->fc & IEEE80211_FCTL_PM))
- ap_sta_ps_start(dev, sta);
- }
-
- /* Drop data::nullfunc frames silently, since they are used only to
- * control station power saving mode. */
- if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
- (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_NULLFUNC) {
+ sta->last_signal = status->signal;
+
+ /*
+ * Change STA power saving mode only at the end of a frame
+ * exchange sequence.
+ */
+ 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_STA)) {
+ /*
+ * Ignore doze->wake transitions that are
+ * indicated by non-data frames, the standard
+ * is unclear here, but for example going to
+ * PS mode and then scanning would cause a
+ * doze->wake transition for the probe request,
+ * and that is clearly undesirable.
+ */
+ if (ieee80211_is_data(hdr->frame_control) &&
+ !ieee80211_has_pm(hdr->frame_control))
+ ap_sta_ps_end(sta);
+ } else {
+ if (ieee80211_has_pm(hdr->frame_control))
+ ap_sta_ps_start(sta);
+ }
+ }
+
+ /*
+ * 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. */
+
+ /*
+ * If we receive a 4-addr nullfunc frame from a STA
+ * that was not moved to a 4-addr STA vlan yet, drop
+ * the frame to the monitor interface, to make sure
+ * that hostapd sees it
+ */
+ if (ieee80211_has_a4(hdr->frame_control) &&
+ (rx->sdata->vif.type == NL80211_IFTYPE_AP ||
+ (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
+ !rx->sdata->u.vlan.sta)))
+ return RX_DROP_MONITOR;
+ /*
+ * 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;
sdata->fragment_next = 0;
if (!skb_queue_empty(&entry->skb_list)) {
-#ifdef CONFIG_MAC80211_DEBUG
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
struct ieee80211_hdr *hdr =
(struct ieee80211_hdr *) entry->skb_list.next->data;
- DECLARE_MAC_BUF(mac);
- DECLARE_MAC_BUF(mac2);
printk(KERN_DEBUG "%s: RX reassembly removed oldest "
"fragment entry (idx=%d age=%lu seq=%d last_frag=%d "
- "addr1=%s addr2=%s\n",
- sdata->dev->name, idx,
+ "addr1=%pM addr2=%pM\n",
+ sdata->name, idx,
jiffies - entry->first_frag_time, entry->seq,
- entry->last_frag, print_mac(mac, hdr->addr1),
- print_mac(mac2, hdr->addr2));
-#endif /* CONFIG_MAC80211_DEBUG */
+ entry->last_frag, hdr->addr1, hdr->addr2);
+#endif
__skb_queue_purge(&entry->skb_list);
}
static inline struct ieee80211_fragment_entry *
ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata,
- u16 fc, unsigned int frag, unsigned int seq,
+ unsigned int frag, unsigned int seq,
int rx_queue, struct ieee80211_hdr *hdr)
{
struct ieee80211_fragment_entry *entry;
idx = sdata->fragment_next;
for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) {
struct ieee80211_hdr *f_hdr;
- u16 f_fc;
idx--;
if (idx < 0)
entry->last_frag + 1 != frag)
continue;
- f_hdr = (struct ieee80211_hdr *) entry->skb_list.next->data;
- f_fc = le16_to_cpu(f_hdr->frame_control);
+ f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data;
- if ((fc & IEEE80211_FCTL_FTYPE) != (f_fc & IEEE80211_FCTL_FTYPE) ||
+ /*
+ * Check ftype and addresses are equal, else check next fragment
+ */
+ if (((hdr->frame_control ^ f_hdr->frame_control) &
+ cpu_to_le16(IEEE80211_FCTL_FTYPE)) ||
compare_ether_addr(hdr->addr1, f_hdr->addr1) != 0 ||
compare_ether_addr(hdr->addr2, f_hdr->addr2) != 0)
continue;
return NULL;
}
-static ieee80211_rx_result
+static ieee80211_rx_result debug_noinline
ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
{
struct ieee80211_hdr *hdr;
u16 sc;
+ __le16 fc;
unsigned int frag, seq;
struct ieee80211_fragment_entry *entry;
struct sk_buff *skb;
- DECLARE_MAC_BUF(mac);
- hdr = (struct ieee80211_hdr *) rx->skb->data;
+ hdr = (struct ieee80211_hdr *)rx->skb->data;
+ fc = hdr->frame_control;
sc = le16_to_cpu(hdr->seq_ctrl);
frag = sc & IEEE80211_SCTL_FRAG;
- if (likely((!(rx->fc & IEEE80211_FCTL_MOREFRAGS) && frag == 0) ||
+ if (likely((!ieee80211_has_morefrags(fc) && frag == 0) ||
(rx->skb)->len < 24 ||
is_multicast_ether_addr(hdr->addr1))) {
/* not fragmented */
}
I802_DEBUG_INC(rx->local->rx_handlers_fragments);
+ if (skb_linearize(rx->skb))
+ return RX_DROP_UNUSABLE;
+
seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
if (frag == 0) {
entry = ieee80211_reassemble_add(rx->sdata, frag, seq,
rx->queue, &(rx->skb));
if (rx->key && rx->key->conf.alg == ALG_CCMP &&
- (rx->fc & IEEE80211_FCTL_PROTECTED)) {
+ ieee80211_has_protected(fc)) {
/* Store CCMP PN so that we can verify that the next
* fragment has a sequential PN value. */
entry->ccmp = 1;
/* This is a fragment for a frame that should already be pending in
* fragment cache. Add this fragment to the end of the pending entry.
*/
- entry = ieee80211_reassemble_find(rx->sdata, rx->fc, frag, seq,
- rx->queue, hdr);
+ entry = ieee80211_reassemble_find(rx->sdata, frag, seq, rx->queue, hdr);
if (!entry) {
I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
return RX_DROP_MONITOR;
break;
}
rpn = rx->key->u.ccmp.rx_pn[rx->queue];
- if (memcmp(pn, rpn, CCMP_PN_LEN) != 0) {
- if (net_ratelimit())
- printk(KERN_DEBUG "%s: defrag: CCMP PN not "
- "sequential A2=%s"
- " PN=%02x%02x%02x%02x%02x%02x "
- "(expected %02x%02x%02x%02x%02x%02x)\n",
- rx->dev->name, print_mac(mac, hdr->addr2),
- rpn[0], rpn[1], rpn[2], rpn[3], rpn[4],
- rpn[5], pn[0], pn[1], pn[2], pn[3],
- pn[4], pn[5]);
+ if (memcmp(pn, rpn, CCMP_PN_LEN))
return RX_DROP_UNUSABLE;
- }
memcpy(entry->last_pn, pn, CCMP_PN_LEN);
}
- skb_pull(rx->skb, ieee80211_get_hdrlen(rx->fc));
+ skb_pull(rx->skb, ieee80211_hdrlen(fc));
__skb_queue_tail(&entry->skb_list, rx->skb);
entry->last_frag = frag;
entry->extra_len += rx->skb->len;
- if (rx->fc & IEEE80211_FCTL_MOREFRAGS) {
+ if (ieee80211_has_morefrags(fc)) {
rx->skb = NULL;
return RX_QUEUED;
}
return RX_CONTINUE;
}
-static ieee80211_rx_result
+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;
- DECLARE_MAC_BUF(mac);
+ struct ieee80211_sub_if_data *sdata = rx->sdata;
+ __le16 fc = ((struct ieee80211_hdr *)rx->skb->data)->frame_control;
- if (likely(!rx->sta ||
- (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_CTL ||
- (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PSPOLL ||
+ if (likely(!rx->sta || !ieee80211_is_pspoll(fc) ||
!(rx->flags & IEEE80211_RX_RA_MATCH)))
return RX_CONTINUE;
- if ((sdata->vif.type != IEEE80211_IF_TYPE_AP) &&
- (sdata->vif.type != IEEE80211_IF_TYPE_VLAN))
+ if ((sdata->vif.type != NL80211_IFTYPE_AP) &&
+ (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_hdr *hdr =
- (struct ieee80211_hdr *) skb->data;
-
- /*
- * Tell TX path to send one frame even though the STA may
- * still remain is PS mode after this frame exchange.
- */
- rx->sta->flags |= WLAN_STA_PSPOLL;
-
-#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
- printk(KERN_DEBUG "STA %s aid %d: PS Poll (entries after %d)\n",
- print_mac(mac, rx->sta->addr), rx->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);
-
- dev_queue_xmit(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 %s sent PS Poll even "
- "though there is no buffered frames for it\n",
- rx->dev->name, print_mac(mac, rx->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. */
return RX_QUEUED;
}
-static ieee80211_rx_result
+static ieee80211_rx_result debug_noinline
ieee80211_rx_h_remove_qos_control(struct ieee80211_rx_data *rx)
{
- u16 fc = rx->fc;
u8 *data = rx->skb->data;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) data;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)data;
- if (!WLAN_FC_IS_QOS_DATA(fc))
+ if (!ieee80211_is_data_qos(hdr->frame_control))
return RX_CONTINUE;
/* remove the qos control field, update frame type and meta-data */
- memmove(data + 2, data, ieee80211_get_hdrlen(fc) - 2);
- hdr = (struct ieee80211_hdr *) skb_pull(rx->skb, 2);
+ memmove(data + IEEE80211_QOS_CTL_LEN, data,
+ ieee80211_hdrlen(hdr->frame_control) - IEEE80211_QOS_CTL_LEN);
+ hdr = (struct ieee80211_hdr *)skb_pull(rx->skb, IEEE80211_QOS_CTL_LEN);
/* change frame type to non QOS */
- rx->fc = fc &= ~IEEE80211_STYPE_QOS_DATA;
- hdr->frame_control = cpu_to_le16(fc);
+ hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
return RX_CONTINUE;
}
static int
ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx)
{
- if (unlikely(!rx->sta || !(rx->sta->flags & WLAN_STA_AUTHORIZED))) {
-#ifdef CONFIG_MAC80211_DEBUG
- if (net_ratelimit())
- printk(KERN_DEBUG "%s: dropped frame "
- "(unauthorized port)\n", rx->dev->name);
-#endif /* CONFIG_MAC80211_DEBUG */
+ if (unlikely(!rx->sta ||
+ !test_sta_flags(rx->sta, WLAN_STA_AUTHORIZED)))
return -EACCES;
- }
return 0;
}
static int
-ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx)
+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. */
- if (unlikely(!(rx->fc & IEEE80211_FCTL_PROTECTED) &&
- (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
- (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC &&
- (rx->key || rx->sdata->drop_unencrypted))) {
- if (net_ratelimit())
- printk(KERN_DEBUG "%s: RX non-WEP frame, but expected "
- "encryption\n", rx->dev->name);
+ if (unlikely(!ieee80211_has_protected(fc) &&
+ !ieee80211_is_nullfunc(fc) &&
+ ieee80211_is_data(fc) &&
+ (rx->key || rx->sdata->drop_unencrypted)))
return -EACCES;
- }
+
return 0;
}
static int
-ieee80211_data_to_8023(struct ieee80211_rx_data *rx)
+ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx)
{
- struct net_device *dev = rx->dev;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
- u16 fc, hdrlen, ethertype;
- u8 *payload;
- u8 dst[ETH_ALEN];
- u8 src[ETH_ALEN];
- struct sk_buff *skb = rx->skb;
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- DECLARE_MAC_BUF(mac);
- DECLARE_MAC_BUF(mac2);
- DECLARE_MAC_BUF(mac3);
- DECLARE_MAC_BUF(mac4);
-
- fc = rx->fc;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+ struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
+ __le16 fc = hdr->frame_control;
- if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
- return -1;
+ /*
+ * Pass through unencrypted frames if the hardware has
+ * decrypted them already.
+ */
+ if (status->flag & RX_FLAG_DECRYPTED)
+ return 0;
- hdrlen = ieee80211_get_hdrlen(fc);
-
- if (ieee80211_vif_is_mesh(&sdata->vif)) {
- int meshhdrlen = ieee80211_get_mesh_hdrlen(
- (struct ieee80211s_hdr *) (skb->data + hdrlen));
- /* Copy on cb:
- * - mesh header: to be used for mesh forwarding
- * decision. It will also be used as mesh header template at
- * tx.c:ieee80211_subif_start_xmit() if interface
- * type is mesh and skb->pkt_type == PACKET_OTHERHOST
- * - ta: to be used if a RERR needs to be sent.
+ if (rx->sta && test_sta_flags(rx->sta, WLAN_STA_MFP)) {
+ if (unlikely(!ieee80211_has_protected(fc) &&
+ ieee80211_is_unicast_robust_mgmt_frame(rx->skb) &&
+ 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))
+ return -EACCES;
+ /*
+ * When using MFP, Action frames are not allowed prior to
+ * having configured keys.
*/
- memcpy(skb->cb, skb->data + hdrlen, meshhdrlen);
- memcpy(MESH_PREQ(skb), hdr->addr2, ETH_ALEN);
- hdrlen += meshhdrlen;
- }
-
- /* convert IEEE 802.11 header + possible LLC headers into Ethernet
- * header
- * IEEE 802.11 address fields:
- * ToDS FromDS Addr1 Addr2 Addr3 Addr4
- * 0 0 DA SA BSSID n/a
- * 0 1 DA BSSID SA n/a
- * 1 0 BSSID SA DA n/a
- * 1 1 RA TA DA SA
- */
+ if (unlikely(ieee80211_is_action(fc) && !rx->key &&
+ ieee80211_is_robust_mgmt_frame(
+ (struct ieee80211_hdr *) rx->skb->data)))
+ return -EACCES;
+ }
- switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
- case IEEE80211_FCTL_TODS:
- /* BSSID SA DA */
- memcpy(dst, hdr->addr3, ETH_ALEN);
- memcpy(src, hdr->addr2, ETH_ALEN);
+ return 0;
+}
- if (unlikely(sdata->vif.type != IEEE80211_IF_TYPE_AP &&
- sdata->vif.type != IEEE80211_IF_TYPE_VLAN)) {
- if (net_ratelimit())
- printk(KERN_DEBUG "%s: dropped ToDS frame "
- "(BSSID=%s SA=%s DA=%s)\n",
- dev->name,
- print_mac(mac, hdr->addr1),
- print_mac(mac2, hdr->addr2),
- print_mac(mac3, hdr->addr3));
- return -1;
- }
- break;
- case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
- /* RA TA DA SA */
- memcpy(dst, hdr->addr3, ETH_ALEN);
- memcpy(src, hdr->addr4, ETH_ALEN);
-
- if (unlikely(sdata->vif.type != IEEE80211_IF_TYPE_WDS &&
- sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)) {
- if (net_ratelimit())
- printk(KERN_DEBUG "%s: dropped FromDS&ToDS "
- "frame (RA=%s TA=%s DA=%s SA=%s)\n",
- rx->dev->name,
- print_mac(mac, hdr->addr1),
- print_mac(mac2, hdr->addr2),
- print_mac(mac3, hdr->addr3),
- print_mac(mac4, hdr->addr4));
- return -1;
- }
- break;
- case IEEE80211_FCTL_FROMDS:
- /* DA BSSID SA */
- memcpy(dst, hdr->addr1, ETH_ALEN);
- memcpy(src, hdr->addr3, ETH_ALEN);
-
- if (sdata->vif.type != IEEE80211_IF_TYPE_STA ||
- (is_multicast_ether_addr(dst) &&
- !compare_ether_addr(src, dev->dev_addr)))
- return -1;
- break;
- case 0:
- /* DA SA BSSID */
- memcpy(dst, hdr->addr1, ETH_ALEN);
- memcpy(src, hdr->addr2, ETH_ALEN);
-
- if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
- if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: dropped IBSS frame "
- "(DA=%s SA=%s BSSID=%s)\n",
- dev->name,
- print_mac(mac, hdr->addr1),
- print_mac(mac2, hdr->addr2),
- print_mac(mac3, hdr->addr3));
- }
- return -1;
- }
- break;
- }
+static int
+__ieee80211_data_to_8023(struct ieee80211_rx_data *rx)
+{
+ struct ieee80211_sub_if_data *sdata = rx->sdata;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
- if (unlikely(skb->len - hdrlen < 8)) {
- if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: RX too short data frame "
- "payload\n", dev->name);
- }
+ if (ieee80211_has_a4(hdr->frame_control) &&
+ sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta)
return -1;
- }
-
- payload = skb->data + hdrlen;
- ethertype = (payload[6] << 8) | payload[7];
- if (likely((compare_ether_addr(payload, rfc1042_header) == 0 &&
- ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
- compare_ether_addr(payload, bridge_tunnel_header) == 0)) {
- /* remove RFC1042 or Bridge-Tunnel encapsulation and
- * replace EtherType */
- skb_pull(skb, hdrlen + 6);
- memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
- memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
- } else {
- struct ethhdr *ehdr;
- __be16 len;
+ 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;
- skb_pull(skb, hdrlen);
- len = htons(skb->len);
- ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr));
- memcpy(ehdr->h_dest, dst, ETH_ALEN);
- memcpy(ehdr->h_source, src, ETH_ALEN);
- ehdr->h_proto = len;
- }
- return 0;
+ return ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type);
}
/*
* requires that rx->skb is a frame with ethernet header
*/
-static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx)
+static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc)
{
- static const u8 pae_group_addr[ETH_ALEN]
+ static const u8 pae_group_addr[ETH_ALEN] __aligned(2)
= { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 };
struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
* 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->vif.addr) == 0 ||
compare_ether_addr(ehdr->h_dest, pae_group_addr) == 0))
return true;
if (ieee80211_802_1x_port_control(rx) ||
- ieee80211_drop_unencrypted(rx))
+ ieee80211_drop_unencrypted(rx, fc))
return false;
return true;
static void
ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
{
- struct net_device *dev = rx->dev;
- struct ieee80211_local *local = rx->local;
+ struct ieee80211_sub_if_data *sdata = rx->sdata;
+ struct net_device *dev = sdata->dev;
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;
skb = rx->skb;
xmit_skb = NULL;
- if (local->bridge_packets && (sdata->vif.type == IEEE80211_IF_TYPE_AP ||
- sdata->vif.type == IEEE80211_IF_TYPE_VLAN) &&
- (rx->flags & IEEE80211_RX_RA_MATCH)) {
+ 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) &&
+ (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
printk(KERN_DEBUG "%s: failed to clone "
"multicast frame\n", dev->name);
} else {
- dsta = sta_info_get(local, skb->data);
- if (dsta && dsta->sdata->dev == dev) {
+ dsta = sta_info_get(sdata, skb->data);
+ if (dsta) {
/*
* The destination station is associated to
* this AP (in this VLAN), so send the frame
}
}
- /* Mesh forwarding */
- if (ieee80211_vif_is_mesh(&sdata->vif)) {
- u8 *mesh_ttl = &((struct ieee80211s_hdr *)skb->cb)->ttl;
- (*mesh_ttl)--;
-
- if (is_multicast_ether_addr(skb->data)) {
- if (*mesh_ttl > 0) {
- xmit_skb = skb_copy(skb, GFP_ATOMIC);
- if (!xmit_skb && net_ratelimit())
- printk(KERN_DEBUG "%s: failed to clone "
- "multicast frame\n", dev->name);
- else
- xmit_skb->pkt_type = PACKET_OTHERHOST;
- } else
- IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.sta,
- dropped_frames_ttl);
- } else if (skb->pkt_type != PACKET_OTHERHOST &&
- compare_ether_addr(dev->dev_addr, skb->data) != 0) {
- if (*mesh_ttl == 0) {
- IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.sta,
- dropped_frames_ttl);
+ if (skb) {
+ int align __maybe_unused;
+
+#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
+ /*
+ * 'align' will only take the values 0 or 2 here
+ * since all frames are required to be aligned
+ * to 2-byte boundaries when being passed to
+ * mac80211. That also explains the __skb_push()
+ * below.
+ */
+ align = ((unsigned long)(skb->data + sizeof(struct ethhdr))) & 3;
+ if (align) {
+ if (WARN_ON(skb_headroom(skb) < 3)) {
dev_kfree_skb(skb);
skb = NULL;
} else {
- xmit_skb = skb;
- xmit_skb->pkt_type = PACKET_OTHERHOST;
- if (!(dev->flags & IFF_PROMISC))
- skb = NULL;
+ u8 *data = skb->data;
+ size_t len = skb_headlen(skb);
+ skb->data -= align;
+ memmove(skb->data, data, len);
+ skb_set_tail_pointer(skb, len);
}
}
- }
+#endif
- if (skb) {
- /* deliver to local stack */
- skb->protocol = eth_type_trans(skb, dev);
- memset(skb->cb, 0, sizeof(skb->cb));
- netif_rx(skb);
+ if (skb) {
+ /* deliver to local stack */
+ skb->protocol = eth_type_trans(skb, dev);
+ memset(skb->cb, 0, sizeof(skb->cb));
+ netif_rx(skb);
+ }
}
if (xmit_skb) {
}
}
-static ieee80211_rx_result
+static ieee80211_rx_result debug_noinline
ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx)
{
- struct net_device *dev = rx->dev;
- struct ieee80211_local *local = rx->local;
- u16 fc, ethertype;
- u8 *payload;
- struct sk_buff *skb = rx->skb, *frame = NULL;
- const struct ethhdr *eth;
- int remaining, err;
- u8 dst[ETH_ALEN];
- u8 src[ETH_ALEN];
- DECLARE_MAC_BUF(mac);
-
- fc = rx->fc;
- if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA))
+ struct net_device *dev = rx->sdata->dev;
+ struct sk_buff *skb = rx->skb;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+ __le16 fc = hdr->frame_control;
+ struct sk_buff_head frame_list;
+
+ if (unlikely(!ieee80211_is_data(fc)))
return RX_CONTINUE;
- if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
+ if (unlikely(!ieee80211_is_data_present(fc)))
return RX_DROP_MONITOR;
if (!(rx->flags & IEEE80211_RX_AMSDU))
return RX_CONTINUE;
- err = ieee80211_data_to_8023(rx);
- if (unlikely(err))
+ if (ieee80211_has_a4(hdr->frame_control) &&
+ rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
+ !rx->sdata->u.vlan.sta)
return RX_DROP_UNUSABLE;
- skb->dev = dev;
+ if (is_multicast_ether_addr(hdr->addr1) &&
+ ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
+ rx->sdata->u.vlan.sta) ||
+ (rx->sdata->vif.type == NL80211_IFTYPE_STATION &&
+ rx->sdata->u.mgd.use_4addr)))
+ return RX_DROP_UNUSABLE;
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += skb->len;
+ skb->dev = dev;
+ __skb_queue_head_init(&frame_list);
- /* skip the wrapping header */
- eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr));
- if (!eth)
+ if (skb_linearize(skb))
return RX_DROP_UNUSABLE;
- while (skb != frame) {
- u8 padding;
- __be16 len = eth->h_proto;
- unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len);
+ ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr,
+ rx->sdata->vif.type,
+ rx->local->hw.extra_tx_headroom);
- remaining = skb->len;
- memcpy(dst, eth->h_dest, ETH_ALEN);
- memcpy(src, eth->h_source, ETH_ALEN);
+ while (!skb_queue_empty(&frame_list)) {
+ rx->skb = __skb_dequeue(&frame_list);
- padding = ((4 - subframe_len) & 0x3);
- /* the last MSDU has no padding */
- if (subframe_len > remaining) {
- printk(KERN_DEBUG "%s: wrong buffer size", dev->name);
- return RX_DROP_UNUSABLE;
+ if (!ieee80211_frame_allowed(rx, fc)) {
+ dev_kfree_skb(rx->skb);
+ continue;
+ }
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += rx->skb->len;
+
+ ieee80211_deliver_skb(rx);
+ }
+
+ return RX_QUEUED;
+}
+
+#ifdef CONFIG_MAC80211_MESH
+static ieee80211_rx_result
+ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
+{
+ struct ieee80211_hdr *hdr;
+ struct ieee80211s_hdr *mesh_hdr;
+ unsigned int hdrlen;
+ struct sk_buff *skb = rx->skb, *fwd_skb;
+ struct ieee80211_local *local = rx->local;
+ 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);
+
+ if (!ieee80211_is_data(hdr->frame_control))
+ return RX_CONTINUE;
+
+ if (!mesh_hdr->ttl)
+ /* illegal frame */
+ return RX_DROP_MONITOR;
+
+ 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(proxied_addr, sdata);
+ if (!mppath) {
+ mpp_path_add(proxied_addr, mpp_addr, sdata);
+ } else {
+ spin_lock_bh(&mppath->state_lock);
+ 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();
+ }
+
+ /* Frame has reached destination. Don't forward */
+ if (!is_multicast_ether_addr(hdr->addr1) &&
+ compare_ether_addr(sdata->vif.addr, hdr->addr3) == 0)
+ return RX_CONTINUE;
+
+ mesh_hdr->ttl--;
- skb_pull(skb, sizeof(struct ethhdr));
- /* if last subframe reuse skb */
- if (remaining <= subframe_len + padding)
- frame = skb;
+ if (rx->flags & IEEE80211_RX_RA_MATCH) {
+ if (!mesh_hdr->ttl)
+ IEEE80211_IFSTA_MESH_CTR_INC(&rx->sdata->u.mesh,
+ dropped_frames_ttl);
else {
- frame = dev_alloc_skb(local->hw.extra_tx_headroom +
- subframe_len);
-
- if (frame == NULL)
- return RX_DROP_UNUSABLE;
-
- skb_reserve(frame, local->hw.extra_tx_headroom +
- sizeof(struct ethhdr));
- memcpy(skb_put(frame, ntohs(len)), skb->data,
- ntohs(len));
-
- eth = (struct ethhdr *) skb_pull(skb, ntohs(len) +
- padding);
- if (!eth) {
- printk(KERN_DEBUG "%s: wrong buffer size ",
- dev->name);
- dev_kfree_skb(frame);
- return RX_DROP_UNUSABLE;
+ struct ieee80211_hdr *fwd_hdr;
+ struct ieee80211_tx_info *info;
+
+ fwd_skb = skb_copy(skb, GFP_ATOMIC);
+
+ if (!fwd_skb && net_ratelimit())
+ printk(KERN_DEBUG "%s: failed to clone mesh frame\n",
+ sdata->name);
+
+ fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data;
+ memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN);
+ info = IEEE80211_SKB_CB(fwd_skb);
+ memset(info, 0, sizeof(*info));
+ info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
+ info->control.vif = &rx->sdata->vif;
+ skb_set_queue_mapping(skb,
+ ieee80211_select_queue(rx->sdata, fwd_skb));
+ ieee80211_set_qos_hdr(local, skb);
+ if (is_multicast_ether_addr(fwd_hdr->addr1))
+ IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.mesh,
+ fwded_mcast);
+ else {
+ int err;
+ /*
+ * Save TA to addr1 to send TA a path error if a
+ * suitable next hop is not found
+ */
+ memcpy(fwd_hdr->addr1, fwd_hdr->addr2,
+ ETH_ALEN);
+ err = mesh_nexthop_lookup(fwd_skb, sdata);
+ /* Failed to immediately resolve next hop:
+ * fwded frame was dropped or will be added
+ * later to the pending skb queue. */
+ if (err)
+ return RX_DROP_MONITOR;
+
+ IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.mesh,
+ fwded_unicast);
}
+ IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.mesh,
+ fwded_frames);
+ ieee80211_add_pending_skb(local, fwd_skb);
+ }
+ }
+
+ if (is_multicast_ether_addr(hdr->addr1) ||
+ sdata->dev->flags & IFF_PROMISC)
+ return RX_CONTINUE;
+ else
+ return RX_DROP_MONITOR;
+}
+#endif
+
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
+{
+ struct ieee80211_sub_if_data *sdata = rx->sdata;
+ struct ieee80211_local *local = rx->local;
+ struct net_device *dev = sdata->dev;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+ __le16 fc = hdr->frame_control;
+ int err;
+
+ if (unlikely(!ieee80211_is_data(hdr->frame_control)))
+ return RX_CONTINUE;
+
+ 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;
+
+ if (!ieee80211_frame_allowed(rx, fc))
+ return RX_DROP_MONITOR;
+
+ rx->skb->dev = dev;
+
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += rx->skb->len;
+
+ if (ieee80211_is_data(hdr->frame_control) &&
+ !is_multicast_ether_addr(hdr->addr1) &&
+ local->hw.conf.dynamic_ps_timeout > 0 && local->ps_sdata) {
+ mod_timer(&local->dynamic_ps_timer, jiffies +
+ msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
+ }
+
+ ieee80211_deliver_skb(rx);
+
+ return RX_QUEUED;
+}
+
+static ieee80211_rx_result debug_noinline
+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;
+ struct sk_buff *skb = rx->skb;
+ struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data;
+ struct tid_ampdu_rx *tid_agg_rx;
+ u16 start_seq_num;
+ u16 tid;
+
+ if (likely(!ieee80211_is_ctl(bar->frame_control)))
+ return RX_CONTINUE;
+
+ if (ieee80211_is_back_req(bar->frame_control)) {
+ if (!rx->sta)
+ return RX_DROP_MONITOR;
+ spin_lock(&rx->sta->lock);
+ tid = le16_to_cpu(bar->control) >> 12;
+ if (!rx->sta->ampdu_mlme.tid_active_rx[tid]) {
+ spin_unlock(&rx->sta->lock);
+ 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;
+
+ /* reset session timer */
+ if (tid_agg_rx->timeout)
+ mod_timer(&tid_agg_rx->session_timer,
+ TU_TO_EXP_TIME(tid_agg_rx->timeout));
+
+ /* release stored frames up to start of BAR */
+ ieee80211_release_reorder_frames(hw, tid_agg_rx, start_seq_num,
+ frames);
+ kfree_skb(skb);
+ spin_unlock(&rx->sta->lock);
+ return RX_QUEUED;
+ }
+
+ return RX_CONTINUE;
+}
+
+static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_mgmt *mgmt,
+ size_t len)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct sk_buff *skb;
+ struct ieee80211_mgmt *resp;
+
+ if (compare_ether_addr(mgmt->da, sdata->vif.addr) != 0) {
+ /* Not to own unicast address */
+ return;
+ }
+
+ if (compare_ether_addr(mgmt->sa, sdata->u.mgd.bssid) != 0 ||
+ compare_ether_addr(mgmt->bssid, sdata->u.mgd.bssid) != 0) {
+ /* Not from the current AP or not associated yet. */
+ return;
+ }
+
+ if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) {
+ /* Too short SA Query request frame */
+ return;
+ }
+
+ skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom);
+ if (skb == NULL)
+ return;
+
+ skb_reserve(skb, local->hw.extra_tx_headroom);
+ resp = (struct ieee80211_mgmt *) skb_put(skb, 24);
+ memset(resp, 0, 24);
+ memcpy(resp->da, mgmt->sa, ETH_ALEN);
+ memcpy(resp->sa, sdata->vif.addr, ETH_ALEN);
+ memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN);
+ resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+ IEEE80211_STYPE_ACTION);
+ skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query));
+ resp->u.action.category = WLAN_CATEGORY_SA_QUERY;
+ resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE;
+ memcpy(resp->u.action.u.sa_query.trans_id,
+ mgmt->u.action.u.sa_query.trans_id,
+ WLAN_SA_QUERY_TR_ID_LEN);
+
+ 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 = rx->sdata;
+ struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
+ struct sk_buff *nskb;
+ struct ieee80211_rx_status *status;
+ int len = rx->skb->len;
+
+ if (!ieee80211_is_action(mgmt->frame_control))
+ return RX_CONTINUE;
+
+ /* drop too small frames */
+ if (len < IEEE80211_MIN_ACTION_SIZE)
+ return RX_DROP_UNUSABLE;
+
+ if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC)
+ return RX_DROP_UNUSABLE;
+
+ if (!(rx->flags & IEEE80211_RX_RA_MATCH))
+ return RX_DROP_UNUSABLE;
+
+ if (ieee80211_drop_unencrypted_mgmt(rx))
+ return RX_DROP_UNUSABLE;
+
+ switch (mgmt->u.action.category) {
+ case WLAN_CATEGORY_BACK:
+ /*
+ * The aggregation code is not prepared to handle
+ * anything but STA/AP due to the BSSID handling;
+ * IBSS could work in the code but isn't supported
+ * by drivers or the standard.
+ */
+ if (sdata->vif.type != NL80211_IFTYPE_STATION &&
+ sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
+ sdata->vif.type != NL80211_IFTYPE_AP)
+ break;
+
+ /* verify action_code is present */
+ if (len < IEEE80211_MIN_ACTION_SIZE + 1)
+ break;
+
+ switch (mgmt->u.action.u.addba_req.action_code) {
+ case WLAN_ACTION_ADDBA_REQ:
+ if (len < (IEEE80211_MIN_ACTION_SIZE +
+ sizeof(mgmt->u.action.u.addba_req)))
+ return RX_DROP_MONITOR;
+ ieee80211_process_addba_request(local, rx->sta, mgmt, len);
+ goto handled;
+ case WLAN_ACTION_ADDBA_RESP:
+ if (len < (IEEE80211_MIN_ACTION_SIZE +
+ sizeof(mgmt->u.action.u.addba_resp)))
+ break;
+ ieee80211_process_addba_resp(local, rx->sta, mgmt, len);
+ goto handled;
+ case WLAN_ACTION_DELBA:
+ if (len < (IEEE80211_MIN_ACTION_SIZE +
+ sizeof(mgmt->u.action.u.delba)))
+ break;
+ ieee80211_process_delba(sdata, rx->sta, mgmt, len);
+ goto handled;
}
+ break;
+ case WLAN_CATEGORY_SPECTRUM_MGMT:
+ if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
+ break;
+
+ if (sdata->vif.type != NL80211_IFTYPE_STATION)
+ break;
+
+ /* verify action_code is present */
+ if (len < IEEE80211_MIN_ACTION_SIZE + 1)
+ break;
+
+ switch (mgmt->u.action.u.measurement.action_code) {
+ case WLAN_ACTION_SPCT_MSR_REQ:
+ if (len < (IEEE80211_MIN_ACTION_SIZE +
+ sizeof(mgmt->u.action.u.measurement)))
+ break;
+ ieee80211_process_measurement_req(sdata, mgmt, len);
+ goto handled;
+ case WLAN_ACTION_SPCT_CHL_SWITCH:
+ if (len < (IEEE80211_MIN_ACTION_SIZE +
+ sizeof(mgmt->u.action.u.chan_switch)))
+ break;
+
+ if (sdata->vif.type != NL80211_IFTYPE_STATION)
+ break;
+
+ if (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN))
+ break;
- skb_reset_network_header(frame);
- frame->dev = dev;
- frame->priority = skb->priority;
- rx->skb = frame;
-
- payload = frame->data;
- ethertype = (payload[6] << 8) | payload[7];
-
- if (likely((compare_ether_addr(payload, rfc1042_header) == 0 &&
- ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
- compare_ether_addr(payload,
- bridge_tunnel_header) == 0)) {
- /* remove RFC1042 or Bridge-Tunnel
- * encapsulation and replace EtherType */
- skb_pull(frame, 6);
- memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN);
- memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
- } else {
- memcpy(skb_push(frame, sizeof(__be16)),
- &len, sizeof(__be16));
- memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN);
- memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
+ return ieee80211_sta_rx_mgmt(sdata, rx->skb);
}
+ break;
+ case WLAN_CATEGORY_SA_QUERY:
+ if (len < (IEEE80211_MIN_ACTION_SIZE +
+ sizeof(mgmt->u.action.u.sa_query)))
+ break;
- if (!ieee80211_frame_allowed(rx)) {
- if (skb == frame) /* last frame */
- return RX_DROP_UNUSABLE;
- dev_kfree_skb(frame);
- continue;
+ switch (mgmt->u.action.u.sa_query.action) {
+ case WLAN_ACTION_SA_QUERY_REQUEST:
+ if (sdata->vif.type != NL80211_IFTYPE_STATION)
+ break;
+ ieee80211_process_sa_query_req(sdata, mgmt, len);
+ goto handled;
}
-
- ieee80211_deliver_skb(rx);
+ break;
+ case WLAN_CATEGORY_MESH_PLINK:
+ case WLAN_CATEGORY_MESH_PATH_SEL:
+ if (ieee80211_vif_is_mesh(&sdata->vif))
+ return ieee80211_mesh_rx_mgmt(sdata, rx->skb);
+ break;
}
- return RX_QUEUED;
-}
-
-static ieee80211_rx_result
-ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
-{
- struct net_device *dev = rx->dev;
- u16 fc;
- int err;
+ /*
+ * For AP mode, hostapd is responsible for handling any action
+ * frames that we didn't handle, including returning unknown
+ * ones. For all other modes we will return them to the sender,
+ * setting the 0x80 bit in the action category, as required by
+ * 802.11-2007 7.3.1.11.
+ */
+ if (sdata->vif.type == NL80211_IFTYPE_AP ||
+ sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+ return RX_DROP_MONITOR;
- fc = rx->fc;
- if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA))
- return RX_CONTINUE;
+ /*
+ * Getting here means the kernel doesn't know how to handle
+ * it, but maybe userspace does ... include returned frames
+ * so userspace can register for those to know whether ones
+ * it transmitted were processed or returned.
+ */
+ status = IEEE80211_SKB_RXCB(rx->skb);
- if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
- return RX_DROP_MONITOR;
+ if (sdata->vif.type == NL80211_IFTYPE_STATION &&
+ cfg80211_rx_action(rx->sdata->dev, status->freq,
+ rx->skb->data, rx->skb->len,
+ GFP_ATOMIC))
+ goto handled;
- err = ieee80211_data_to_8023(rx);
- if (unlikely(err))
+ /* do not return rejected action frames */
+ if (mgmt->u.action.category & 0x80)
return RX_DROP_UNUSABLE;
- if (!ieee80211_frame_allowed(rx))
- return RX_DROP_MONITOR;
+ nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0,
+ GFP_ATOMIC);
+ if (nskb) {
+ struct ieee80211_mgmt *mgmt = (void *)nskb->data;
- rx->skb->dev = dev;
+ mgmt->u.action.category |= 0x80;
+ memcpy(mgmt->da, mgmt->sa, ETH_ALEN);
+ memcpy(mgmt->sa, rx->sdata->vif.addr, ETH_ALEN);
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += rx->skb->len;
+ memset(nskb->cb, 0, sizeof(nskb->cb));
- ieee80211_deliver_skb(rx);
+ ieee80211_tx_skb(rx->sdata, nskb);
+ }
+ handled:
+ if (rx->sta)
+ rx->sta->rx_packets++;
+ dev_kfree_skb(rx->skb);
return RX_QUEUED;
}
-static ieee80211_rx_result
-ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx)
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx)
{
- struct ieee80211_local *local = rx->local;
- struct ieee80211_hw *hw = &local->hw;
- struct sk_buff *skb = rx->skb;
- struct ieee80211_bar *bar = (struct ieee80211_bar *) skb->data;
- struct tid_ampdu_rx *tid_agg_rx;
- u16 start_seq_num;
- u16 tid;
-
- if (likely((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_CTL))
- return RX_CONTINUE;
-
- if ((rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BACK_REQ) {
- if (!rx->sta)
- return RX_CONTINUE;
- tid = le16_to_cpu(bar->control) >> 12;
- if (rx->sta->ampdu_mlme.tid_state_rx[tid]
- != HT_AGG_STATE_OPERATIONAL)
- return RX_CONTINUE;
- tid_agg_rx = rx->sta->ampdu_mlme.tid_rx[tid];
-
- start_seq_num = le16_to_cpu(bar->start_seq_num) >> 4;
+ struct ieee80211_sub_if_data *sdata = rx->sdata;
+ ieee80211_rx_result rxs;
- /* reset session timer */
- if (tid_agg_rx->timeout) {
- unsigned long expires =
- jiffies + (tid_agg_rx->timeout / 1000) * HZ;
- mod_timer(&tid_agg_rx->session_timer, expires);
- }
+ if (!(rx->flags & IEEE80211_RX_RA_MATCH))
+ return RX_DROP_MONITOR;
- /* 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();
+ if (ieee80211_drop_unencrypted_mgmt(rx))
return RX_DROP_UNUSABLE;
- }
- return RX_CONTINUE;
-}
+ rxs = ieee80211_work_rx_mgmt(rx->sdata, rx->skb);
+ if (rxs != RX_CONTINUE)
+ return rxs;
-static ieee80211_rx_result
-ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx)
-{
- struct ieee80211_sub_if_data *sdata;
+ if (ieee80211_vif_is_mesh(&sdata->vif))
+ return ieee80211_mesh_rx_mgmt(sdata, rx->skb);
- if (!(rx->flags & IEEE80211_RX_RA_MATCH))
- return RX_DROP_MONITOR;
+ if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
+ return ieee80211_ibss_rx_mgmt(sdata, rx->skb);
- sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
- if ((sdata->vif.type == IEEE80211_IF_TYPE_STA ||
- sdata->vif.type == IEEE80211_IF_TYPE_IBSS ||
- sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) &&
- !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
- ieee80211_sta_rx_mgmt(rx->dev, rx->skb, rx->status);
- else
- return RX_DROP_MONITOR;
+ if (sdata->vif.type == NL80211_IFTYPE_STATION)
+ return ieee80211_sta_rx_mgmt(sdata, rx->skb);
- return RX_QUEUED;
+ return RX_DROP_MONITOR;
}
-static void ieee80211_rx_michael_mic_report(struct net_device *dev,
- struct ieee80211_hdr *hdr,
+static void ieee80211_rx_michael_mic_report(struct ieee80211_hdr *hdr,
struct ieee80211_rx_data *rx)
{
- int keyidx, hdrlen;
- DECLARE_MAC_BUF(mac);
- DECLARE_MAC_BUF(mac2);
+ int keyidx;
+ unsigned int hdrlen;
- hdrlen = ieee80211_get_hdrlen_from_skb(rx->skb);
+ hdrlen = ieee80211_hdrlen(hdr->frame_control);
if (rx->skb->len >= hdrlen + 4)
keyidx = rx->skb->data[hdrlen + 3] >> 6;
else
keyidx = -1;
- if (net_ratelimit())
- printk(KERN_DEBUG "%s: TKIP hwaccel reported Michael MIC "
- "failure from %s to %s keyidx=%d\n",
- dev->name, print_mac(mac, hdr->addr2),
- print_mac(mac2, hdr->addr1), keyidx);
-
if (!rx->sta) {
/*
* Some hardware seem to generate incorrect Michael MIC
* reports; ignore them to avoid triggering countermeasures.
*/
- if (net_ratelimit())
- printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
- "error for unknown address %s\n",
- dev->name, print_mac(mac, hdr->addr2));
- goto ignore;
+ return;
}
- if (!(rx->fc & IEEE80211_FCTL_PROTECTED)) {
- if (net_ratelimit())
- printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
- "error for a frame with no PROTECTED flag (src "
- "%s)\n", dev->name, print_mac(mac, hdr->addr2));
- goto ignore;
- }
+ if (!ieee80211_has_protected(hdr->frame_control))
+ return;
- if (rx->sdata->vif.type == IEEE80211_IF_TYPE_AP && keyidx) {
+ if (rx->sdata->vif.type == NL80211_IFTYPE_AP && keyidx) {
/*
* APs with pairwise keys should never receive Michael MIC
* errors for non-zero keyidx because these are reserved for
* group keys and only the AP is sending real multicast
* frames in the BSS.
*/
- if (net_ratelimit())
- printk(KERN_DEBUG "%s: ignored Michael MIC error for "
- "a frame with non-zero keyidx (%d)"
- " (src %s)\n", dev->name, keyidx,
- print_mac(mac, hdr->addr2));
- goto ignore;
- }
-
- if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
- ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
- (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)) {
- if (net_ratelimit())
- printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
- "error for a frame that cannot be encrypted "
- "(fc=0x%04x) (src %s)\n",
- dev->name, rx->fc, print_mac(mac, hdr->addr2));
- goto ignore;
- }
-
- mac80211_ev_michael_mic_failure(rx->dev, keyidx, hdr);
- ignore:
- dev_kfree_skb(rx->skb);
- rx->skb = NULL;
+ return;
+ }
+
+ if (!ieee80211_is_data(hdr->frame_control) &&
+ !ieee80211_is_auth(hdr->frame_control))
+ return;
+
+ mac80211_ev_michael_mic_failure(rx->sdata, keyidx, hdr, NULL,
+ GFP_ATOMIC);
}
/* 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) &&
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)
skb->protocol = htons(ETH_P_802_2);
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
- if (!netif_running(sdata->dev))
+ if (!ieee80211_sdata_running(sdata))
continue;
- if (sdata->vif.type != IEEE80211_IF_TYPE_MNTR ||
+ if (sdata->vif.type != NL80211_IFTYPE_MONITOR ||
!(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES))
continue;
} else
goto out_free_skb;
- rx->flags |= IEEE80211_RX_CMNTR_REPORTED;
+ status->flag |= RX_FLAG_INTERNAL_CMTR;
return;
out_free_skb:
dev_kfree_skb(skb);
}
-typedef ieee80211_rx_result (*ieee80211_rx_handler)(struct ieee80211_rx_data *);
-static ieee80211_rx_handler ieee80211_rx_handlers[] =
-{
- ieee80211_rx_h_if_stats,
- ieee80211_rx_h_passive_scan,
- ieee80211_rx_h_check,
- ieee80211_rx_h_decrypt,
- ieee80211_rx_h_sta_process,
- ieee80211_rx_h_defragment,
- ieee80211_rx_h_ps_poll,
- ieee80211_rx_h_michael_mic_verify,
- /* this must be after decryption - so header is counted in MPDU mic
- * must be before pae and data, so QOS_DATA format frames
- * are not passed to user space by these functions
- */
- ieee80211_rx_h_remove_qos_control,
- ieee80211_rx_h_amsdu,
- ieee80211_rx_h_data,
- ieee80211_rx_h_ctrl,
- ieee80211_rx_h_mgmt,
- NULL
-};
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)
{
- ieee80211_rx_handler *handler;
+ 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;
- for (handler = ieee80211_rx_handlers; *handler != NULL; handler++) {
- res = (*handler)(rx);
+#define CALL_RXH(rxh) \
+ do { \
+ res = rxh(rx); \
+ if (res != RX_CONTINUE) \
+ 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)
+
+ 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);
+#endif
+ 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_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:
- continue;
+ ieee80211_rx_cooked_monitor(rx, rate);
+ break;
case RX_DROP_UNUSABLE:
- case RX_DROP_MONITOR:
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;
}
- break;
- }
-
- switch (res) {
- case RX_CONTINUE:
- case RX_DROP_MONITOR:
- ieee80211_rx_cooked_monitor(rx);
- break;
- case RX_DROP_UNUSABLE:
- dev_kfree_skb(rx->skb);
- break;
}
}
/* main receive path */
static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata,
- u8 *bssid, struct ieee80211_rx_data *rx,
+ struct ieee80211_rx_data *rx,
struct ieee80211_hdr *hdr)
{
+ 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 IEEE80211_IF_TYPE_STA:
- if (!bssid)
+ case NL80211_IFTYPE_STATION:
+ if (!bssid && !sdata->u.mgd.use_4addr)
return 0;
- if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid)) {
- if (!(rx->flags & IEEE80211_RX_IN_SCAN))
- return 0;
- rx->flags &= ~IEEE80211_RX_RA_MATCH;
- } else if (!multicast &&
- compare_ether_addr(sdata->dev->dev_addr,
- hdr->addr1) != 0) {
+ if (!multicast &&
+ compare_ether_addr(sdata->vif.addr, hdr->addr1) != 0) {
if (!(sdata->dev->flags & IFF_PROMISC))
return 0;
rx->flags &= ~IEEE80211_RX_RA_MATCH;
}
break;
- case IEEE80211_IF_TYPE_IBSS:
+ case NL80211_IFTYPE_ADHOC:
if (!bssid)
return 0;
- if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT &&
- (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON)
+ if (ieee80211_is_beacon(hdr->frame_control)) {
return 1;
- else if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid)) {
+ }
+ else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) {
if (!(rx->flags & IEEE80211_RX_IN_SCAN))
return 0;
rx->flags &= ~IEEE80211_RX_RA_MATCH;
} else if (!multicast &&
- compare_ether_addr(sdata->dev->dev_addr,
+ compare_ether_addr(sdata->vif.addr,
hdr->addr1) != 0) {
if (!(sdata->dev->flags & IFF_PROMISC))
return 0;
rx->flags &= ~IEEE80211_RX_RA_MATCH;
- } else if (!rx->sta)
- rx->sta = ieee80211_ibss_add_sta(sdata->dev, rx->skb,
- bssid, hdr->addr2);
+ } else if (!rx->sta) {
+ int rate_idx;
+ if (status->flag & RX_FLAG_HT)
+ rate_idx = 0; /* TODO: HT rates */
+ else
+ rate_idx = status->rate_idx;
+ rx->sta = ieee80211_ibss_add_sta(sdata, bssid,
+ hdr->addr2, BIT(rate_idx), GFP_ATOMIC);
+ }
break;
- case IEEE80211_IF_TYPE_MESH_POINT:
+ case NL80211_IFTYPE_MESH_POINT:
if (!multicast &&
- compare_ether_addr(sdata->dev->dev_addr,
+ compare_ether_addr(sdata->vif.addr,
hdr->addr1) != 0) {
if (!(sdata->dev->flags & IFF_PROMISC))
return 0;
rx->flags &= ~IEEE80211_RX_RA_MATCH;
}
break;
- case IEEE80211_IF_TYPE_VLAN:
- case IEEE80211_IF_TYPE_AP:
+ case NL80211_IFTYPE_AP_VLAN:
+ case NL80211_IFTYPE_AP:
if (!bssid) {
- if (compare_ether_addr(sdata->dev->dev_addr,
+ if (compare_ether_addr(sdata->vif.addr,
hdr->addr1))
return 0;
} else if (!ieee80211_bssid_match(bssid,
- sdata->dev->dev_addr)) {
+ sdata->vif.addr)) {
if (!(rx->flags & IEEE80211_RX_IN_SCAN))
return 0;
rx->flags &= ~IEEE80211_RX_RA_MATCH;
}
- if (sdata->dev == sdata->local->mdev &&
- !(rx->flags & IEEE80211_RX_IN_SCAN))
- /* do not receive anything via
- * master device when not scanning */
- return 0;
break;
- case IEEE80211_IF_TYPE_WDS:
- if (bssid ||
- (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
+ case NL80211_IFTYPE_WDS:
+ if (bssid || !ieee80211_is_data(hdr->frame_control))
return 0;
if (compare_ether_addr(sdata->u.wds.remote_addr, hdr->addr2))
return 0;
break;
- case IEEE80211_IF_TYPE_MNTR:
- /* take everything */
- break;
- case IEEE80211_IF_TYPE_INVALID:
+ case NL80211_IFTYPE_MONITOR:
+ case NL80211_IFTYPE_UNSPECIFIED:
+ case __NL80211_IFTYPE_AFTER_LAST:
/* should never get here */
WARN_ON(1);
break;
*/
static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
struct sk_buff *skb,
- struct ieee80211_rx_status *status,
- u32 load,
struct ieee80211_rate *rate)
{
+ struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_sub_if_data *sdata;
struct ieee80211_hdr *hdr;
+ __le16 fc;
struct ieee80211_rx_data rx;
- u16 type;
int prepares;
struct ieee80211_sub_if_data *prev = NULL;
struct sk_buff *skb_new;
- u8 *bssid;
+ struct sta_info *sta, *tmp;
+ bool found_sta = false;
+ int err = 0;
- hdr = (struct ieee80211_hdr *) skb->data;
+ fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
memset(&rx, 0, sizeof(rx));
rx.skb = skb;
rx.local = local;
- rx.status = status;
- rx.load = load;
- rx.rate = rate;
- rx.fc = le16_to_cpu(hdr->frame_control);
- type = rx.fc & IEEE80211_FCTL_FTYPE;
-
- if (type == IEEE80211_FTYPE_DATA || type == IEEE80211_FTYPE_MGMT)
+ if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc))
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(local->mdev, hdr, &rx);
- return;
- }
-
- if (unlikely(local->sta_sw_scanning || local->sta_hw_scanning))
+ if (unlikely(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
+ test_bit(SCAN_OFF_CHANNEL, &local->scanning)))
rx.flags |= IEEE80211_RX_IN_SCAN;
- ieee80211_parse_qos(&rx);
- ieee80211_verify_ip_alignment(&rx);
-
- skb = rx.skb;
-
- list_for_each_entry_rcu(sdata, &local->interfaces, list) {
- if (!netif_running(sdata->dev))
- continue;
-
- if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR)
- continue;
-
- bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type);
- rx.flags |= IEEE80211_RX_RA_MATCH;
- prepares = prepare_for_handlers(sdata, bssid, &rx, hdr);
-
- if (!prepares)
- continue;
-
- /*
- * frame is destined for this interface, but if it's not
- * also for the previous one we handle that after the
- * loop to avoid copying the SKB once too much
- */
-
- if (!prev) {
- prev = sdata;
- continue;
- }
-
- /*
- * frame was destined for the previous interface
- * so invoke RX handlers for it
- */
-
- skb_new = skb_copy(skb, GFP_ATOMIC);
- if (!skb_new) {
- if (net_ratelimit())
- printk(KERN_DEBUG "%s: failed to copy "
- "multicast frame for %s",
- wiphy_name(local->hw.wiphy),
- prev->dev->name);
- continue;
- }
- rx.fc = le16_to_cpu(hdr->frame_control);
- ieee80211_invoke_rx_handlers(prev, &rx, skb_new);
- prev = sdata;
- }
- if (prev) {
- rx.fc = le16_to_cpu(hdr->frame_control);
- ieee80211_invoke_rx_handlers(prev, &rx, skb);
- } 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);
-}
-
-
-/*
- * As it function blongs to Rx path it must be called with
- * the proper rcu_read_lock protection for its flow.
- */
-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)
-{
- struct ieee80211_local *local = hw_to_local(hw);
- struct ieee80211_rx_status status;
- u16 head_seq_num, buf_size;
- int index;
- u32 pkt_load;
- struct ieee80211_supported_band *sband;
- struct ieee80211_rate *rate;
-
- buf_size = tid_agg_rx->buf_size;
- head_seq_num = tid_agg_rx->head_seq_num;
+ if (ieee80211_is_mgmt(fc))
+ err = skb_linearize(skb);
+ else
+ err = !pskb_may_pull(skb, ieee80211_hdrlen(fc));
- /* frame with out of date sequence number */
- if (seq_less(mpdu_seq_num, head_seq_num)) {
+ if (err) {
dev_kfree_skb(skb);
- return 1;
+ return;
}
- /* 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;
-
- if (tid_agg_rx->reorder_buf[index]) {
- /* release the reordered frames to stack */
- memcpy(&status,
- tid_agg_rx->reorder_buf[index]->cb,
- sizeof(status));
- sband = local->hw.wiphy->bands[status.band];
- rate = &sband->bitrates[status.rate_idx];
- pkt_load = ieee80211_rx_load_stats(local,
- tid_agg_rx->reorder_buf[index],
- &status, rate);
- __ieee80211_rx_handle_packet(hw,
- tid_agg_rx->reorder_buf[index],
- &status, pkt_load, rate);
- tid_agg_rx->stored_mpdu_num--;
- tid_agg_rx->reorder_buf[index] = NULL;
+ hdr = (struct ieee80211_hdr *)skb->data;
+ ieee80211_parse_qos(&rx);
+ ieee80211_verify_alignment(&rx);
+
+ if (ieee80211_is_data(fc)) {
+ for_each_sta_info(local, hdr->addr2, sta, tmp) {
+ rx.sta = sta;
+ found_sta = true;
+ rx.sdata = sta->sdata;
+
+ rx.flags |= IEEE80211_RX_RA_MATCH;
+ prepares = prepare_for_handlers(rx.sdata, &rx, hdr);
+ 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;
}
- tid_agg_rx->head_seq_num =
- seq_inc(tid_agg_rx->head_seq_num);
}
- 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 (!found_sta) {
+ list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+ if (!ieee80211_sdata_running(sdata))
+ continue;
- /* 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;
- }
+ if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
+ sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+ continue;
- /* put the frame in the reordering buffer */
- tid_agg_rx->reorder_buf[index] = skb;
- 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;
- while (tid_agg_rx->reorder_buf[index]) {
- /* release the reordered frame back to stack */
- memcpy(&status, tid_agg_rx->reorder_buf[index]->cb,
- sizeof(status));
- sband = local->hw.wiphy->bands[status.band];
- rate = &sband->bitrates[status.rate_idx];
- pkt_load = ieee80211_rx_load_stats(local,
- tid_agg_rx->reorder_buf[index],
- &status, rate);
- __ieee80211_rx_handle_packet(hw, tid_agg_rx->reorder_buf[index],
- &status, pkt_load, rate);
- tid_agg_rx->stored_mpdu_num--;
- tid_agg_rx->reorder_buf[index] = NULL;
- tid_agg_rx->head_seq_num = seq_inc(tid_agg_rx->head_seq_num);
- index = seq_sub(tid_agg_rx->head_seq_num,
- tid_agg_rx->ssn) % tid_agg_rx->buf_size;
- }
- return 1;
-}
+ /*
+ * frame is destined for this interface, but if it's
+ * not also for the previous one we handle that after
+ * the loop to avoid copying the SKB once too much
+ */
-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 fc, sc;
- u16 mpdu_seq_num;
- u8 ret = 0, *qc;
- int tid;
+ if (!prev) {
+ prev = sdata;
+ continue;
+ }
- sta = sta_info_get(local, hdr->addr2);
- if (!sta)
- return ret;
+ rx.sta = sta_info_get_bss(prev, hdr->addr2);
- fc = le16_to_cpu(hdr->frame_control);
+ rx.flags |= IEEE80211_RX_RA_MATCH;
+ prepares = prepare_for_handlers(prev, &rx, hdr);
- /* filter the QoS data rx stream according to
- * STA/TID and check if this STA/TID is on aggregation */
- if (!WLAN_FC_IS_QOS_DATA(fc))
- goto end_reorder;
+ if (!prepares)
+ goto next;
- qc = skb->data + ieee80211_get_hdrlen(fc) - QOS_CONTROL_LEN;
- tid = qc[0] & QOS_CONTROL_TID_MASK;
+ if (status->flag & RX_FLAG_MMIC_ERROR) {
+ rx.sdata = prev;
+ if (rx.flags & IEEE80211_RX_RA_MATCH)
+ ieee80211_rx_michael_mic_report(hdr,
+ &rx);
+ goto next;
+ }
- if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_OPERATIONAL)
- goto end_reorder;
+ /*
+ * frame was destined for the previous interface
+ * so invoke RX handlers for it
+ */
- tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
+ skb_new = skb_copy(skb, GFP_ATOMIC);
+ if (!skb_new) {
+ if (net_ratelimit())
+ printk(KERN_DEBUG "%s: failed to copy "
+ "multicast frame for %s\n",
+ wiphy_name(local->hw.wiphy),
+ prev->name);
+ goto next;
+ }
+ ieee80211_invoke_rx_handlers(prev, &rx, skb_new, rate);
+next:
+ prev = sdata;
+ }
- /* null data frames are excluded */
- if (unlikely(fc & IEEE80211_STYPE_NULLFUNC))
- goto end_reorder;
+ if (prev) {
+ rx.sta = sta_info_get_bss(prev, hdr->addr2);
- /* new un-ordered ampdu frame - process it */
+ rx.flags |= IEEE80211_RX_RA_MATCH;
+ prepares = prepare_for_handlers(prev, &rx, hdr);
- /* reset session timer */
- if (tid_agg_rx->timeout) {
- unsigned long expires =
- jiffies + (tid_agg_rx->timeout / 1000) * HZ;
- mod_timer(&tid_agg_rx->session_timer, expires);
+ if (!prepares)
+ prev = NULL;
+ }
}
-
- /* 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->dev, 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;
+ if (prev)
+ ieee80211_invoke_rx_handlers(prev, &rx, skb, rate);
+ else
+ dev_kfree_skb(skb);
}
/*
* This is the receive path handler. It is called by a low level driver when an
* 802.11 MPDU is received from the hardware.
*/
-void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
- struct ieee80211_rx_status *status)
+void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct ieee80211_local *local = hw_to_local(hw);
- u32 pkt_load;
struct ieee80211_rate *rate = NULL;
struct ieee80211_supported_band *sband;
+ struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
- if (status->band < 0 ||
- status->band > IEEE80211_NUM_BANDS) {
- WARN_ON(1);
- return;
- }
+ WARN_ON_ONCE(softirq_count() == 0);
+
+ if (WARN_ON(status->band < 0 ||
+ status->band >= IEEE80211_NUM_BANDS))
+ goto drop;
sband = local->hw.wiphy->bands[status->band];
+ if (WARN_ON(!sband))
+ goto drop;
- if (!sband ||
- status->rate_idx < 0 ||
- status->rate_idx >= sband->n_bitrates) {
- WARN_ON(1);
- return;
- }
+ /*
+ * If we're suspending, it is possible although not too likely
+ * that we'd be receiving frames after having already partially
+ * quiesced the stack. We can't process such frames then since
+ * that might, for example, cause stations to be added or other
+ * driver callbacks be invoked.
+ */
+ if (unlikely(local->quiescing || local->suspended))
+ goto drop;
+
+ /*
+ * The same happens when we're not even started,
+ * but that's worth a warning.
+ */
+ if (WARN_ON(!local->started))
+ goto drop;
- rate = &sband->bitrates[status->rate_idx];
+ if (status->flag & RX_FLAG_HT) {
+ /*
+ * 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;
+ } else {
+ if (WARN_ON(status->rate_idx < 0 ||
+ status->rate_idx >= sband->n_bitrates))
+ goto drop;
+ rate = &sband->bitrates[status->rate_idx];
+ }
/*
* key references and virtual interfaces are protected using RCU
* if it was previously present.
* Also, frames with less than 16 bytes are dropped.
*/
- skb = ieee80211_rx_monitor(local, skb, status, rate);
+ skb = ieee80211_rx_monitor(local, skb, rate);
if (!skb) {
rcu_read_unlock();
return;
}
- pkt_load = ieee80211_rx_load_stats(local, skb, status, rate);
- local->channel_use_raw += pkt_load;
-
- if (!ieee80211_rx_reorder_ampdu(local, skb))
- __ieee80211_rx_handle_packet(hw, skb, status, pkt_load, rate);
+ __ieee80211_rx_handle_packet(hw, skb, rate);
rcu_read_unlock();
+
+ return;
+ drop:
+ kfree_skb(skb);
}
-EXPORT_SYMBOL(__ieee80211_rx);
+EXPORT_SYMBOL(ieee80211_rx);
/* This is a version of the rx handler that can be called from hard irq
* context. Post the skb on the queue and schedule the tasklet */
-void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb,
- struct ieee80211_rx_status *status)
+void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct ieee80211_local *local = hw_to_local(hw);
BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb));
- skb->dev = local->mdev;
- /* copy status into skb->cb for use by tasklet */
- memcpy(skb->cb, status, sizeof(*status));
skb->pkt_type = IEEE80211_RX_MSG;
skb_queue_tail(&local->skb_queue, skb);
tasklet_schedule(&local->tasklet);