#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
-#include <net/iw_handler.h>
+#include <linux/rcupdate.h>
#include <net/mac80211.h>
#include <net/ieee80211_radiotap.h>
/* pre-rx handlers
*
* these don't have dev/sdata fields in the rx data
+ * The sta value should also not be used because it may
+ * be NULL even though a STA (in IBSS mode) will be added.
*/
static ieee80211_txrx_result
tid = 0; /* 802.1d - Best Effort */
}
}
-#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
+
I802_DEBUG_INC(rx->local->wme_rx_queue[tid]);
- if (rx->sta) {
+ /* only a debug counter, sta might not be assigned properly yet */
+ if (rx->sta)
I802_DEBUG_INC(rx->sta->wme_rx_queue[tid]);
- }
-#endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
rx->u.rx.queue = tid;
/* Set skb->priority to 1d tag if highest order bit of TID is not set.
* 1 usec = 1/8 * (1080 / 10) = 13.5 */
if (mode->mode == MODE_IEEE80211A ||
- mode->mode == MODE_ATHEROS_TURBO ||
- mode->mode == MODE_ATHEROS_TURBOG ||
(mode->mode == MODE_IEEE80211G &&
rate->flags & IEEE80211_RATE_ERP))
hdrtime = CHAN_UTIL_HDR_SHORT;
/* Divide channel_use by 8 to avoid wrapping around the counter */
load >>= CHAN_UTIL_SHIFT;
local->channel_use_raw += load;
- if (rx->sta)
- rx->sta->channel_use_raw += load;
rx->u.rx.load = load;
return TXRX_CONTINUE;
static ieee80211_txrx_result
ieee80211_rx_h_if_stats(struct ieee80211_txrx_data *rx)
{
+ if (rx->sta)
+ rx->sta->channel_use_raw += rx->u.rx.load;
rx->sdata->channel_use_raw += rx->u.rx.load;
return TXRX_CONTINUE;
}
return TXRX_QUEUED;
}
- if (unlikely(rx->u.rx.in_scan)) {
+ if (unlikely(rx->flags & IEEE80211_TXRXD_RXIN_SCAN)) {
/* scanning finished during invoking of handlers */
I802_DEBUG_INC(local->rx_handlers_drop_passive_scan);
return TXRX_DROP;
ieee80211_rx_h_check(struct ieee80211_txrx_data *rx)
{
struct ieee80211_hdr *hdr;
- int always_sta_key;
hdr = (struct ieee80211_hdr *) rx->skb->data;
/* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */
if (unlikely(rx->fc & IEEE80211_FCTL_RETRY &&
rx->sta->last_seq_ctrl[rx->u.rx.queue] ==
hdr->seq_ctrl)) {
- if (rx->u.rx.ra_match) {
+ if (rx->flags & IEEE80211_TXRXD_RXRA_MATCH) {
rx->local->dot11FrameDuplicateCount++;
rx->sta->num_duplicates++;
}
return TXRX_DROP;
}
- if (!rx->u.rx.ra_match)
+ if (!(rx->flags & IEEE80211_TXRXD_RXRA_MATCH))
rx->skb->pkt_type = PACKET_OTHERHOST;
else if (compare_ether_addr(rx->dev->dev_addr, hdr->addr1) == 0)
rx->skb->pkt_type = PACKET_HOST;
if ((!(rx->fc & IEEE80211_FCTL_FROMDS) &&
!(rx->fc & IEEE80211_FCTL_TODS) &&
(rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)
- || !rx->u.rx.ra_match) {
+ || !(rx->flags & IEEE80211_TXRXD_RXRA_MATCH)) {
/* Drop IBSS frames and frames for other hosts
* silently. */
return TXRX_DROP;
return TXRX_QUEUED;
}
- if (rx->sdata->type == IEEE80211_IF_TYPE_STA)
- always_sta_key = 0;
- else
- always_sta_key = 1;
+ return TXRX_CONTINUE;
+}
+
+
+static ieee80211_txrx_result
+ieee80211_rx_h_load_key(struct ieee80211_txrx_data *rx)
+{
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
+ int keyidx;
+ int hdrlen;
+ struct ieee80211_key *stakey = NULL;
+
+ /*
+ * Key selection 101
+ *
+ * There are three types of keys:
+ * - GTK (group keys)
+ * - 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.
+ *
+ * Note that in a regular BSS, multicast frames are sent by the
+ * AP only, associated stations unicast the frame to the AP first
+ * which then multicasts it on their behalf.
+ *
+ * There is also a slight problem in IBSS mode: GTKs are negotiated
+ * with each station, that is something we don't currently handle.
+ * The spec seems to expect that one negotiates the same key with
+ * every station but there's no such requirement; VLANs could be
+ * possible.
+ */
+
+ if (!(rx->fc & IEEE80211_FCTL_PROTECTED))
+ return TXRX_CONTINUE;
+
+ /*
+ * No point in finding a key if the frame is neither
+ * addressed to us nor a multicast frame.
+ */
+ if (!(rx->flags & IEEE80211_TXRXD_RXRA_MATCH))
+ return TXRX_CONTINUE;
+
+ if (rx->sta)
+ stakey = rcu_dereference(rx->sta->key);
- if (rx->sta && rx->sta->key && always_sta_key) {
- rx->key = rx->sta->key;
+ if (!is_multicast_ether_addr(hdr->addr1) && stakey) {
+ rx->key = stakey;
} else {
- if (rx->sta && rx->sta->key)
- rx->key = rx->sta->key;
- else
- rx->key = rx->sdata->default_key;
-
- if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) &&
- rx->fc & IEEE80211_FCTL_PROTECTED) {
- int keyidx = ieee80211_wep_get_keyidx(rx->skb);
-
- if (keyidx >= 0 && keyidx < NUM_DEFAULT_KEYS &&
- (!rx->sta || !rx->sta->key || keyidx > 0))
- rx->key = rx->sdata->keys[keyidx];
-
- if (!rx->key) {
- if (!rx->u.rx.ra_match)
- return TXRX_DROP;
- printk(KERN_DEBUG "%s: RX WEP frame with "
- "unknown keyidx %d (A1=" MAC_FMT " A2="
- MAC_FMT " A3=" MAC_FMT ")\n",
- rx->dev->name, keyidx,
- MAC_ARG(hdr->addr1),
- MAC_ARG(hdr->addr2),
- MAC_ARG(hdr->addr3));
- if (!rx->local->apdev)
- return TXRX_DROP;
- ieee80211_rx_mgmt(
- rx->local, rx->skb, rx->u.rx.status,
- ieee80211_msg_wep_frame_unknown_key);
- return TXRX_QUEUED;
- }
- }
+ /*
+ * The device doesn't give us the IV so we won't be
+ * able to look up the key. That's ok though, we
+ * don't need to decrypt the frame, we just won't
+ * be able to keep statistics accurate.
+ * Except for key threshold notifications, should
+ * we somehow allow the driver to tell us which key
+ * the hardware used if this flag is set?
+ */
+ if ((rx->u.rx.status->flag & RX_FLAG_DECRYPTED) &&
+ (rx->u.rx.status->flag & RX_FLAG_IV_STRIPPED))
+ return TXRX_CONTINUE;
+
+ hdrlen = ieee80211_get_hdrlen(rx->fc);
+
+ if (rx->skb->len < 8 + hdrlen)
+ return TXRX_DROP; /* TODO: count this? */
+
+ /*
+ * no need to call ieee80211_wep_get_keyidx,
+ * it verifies a bunch of things we've done already
+ */
+ keyidx = rx->skb->data[hdrlen + 3] >> 6;
+
+ rx->key = rcu_dereference(rx->sdata->keys[keyidx]);
+
+ /*
+ * RSNA-protected unicast frames should always be sent with
+ * pairwise or station-to-station keys, but for WEP we allow
+ * using a key index as well.
+ */
+ if (rx->key && rx->key->conf.alg != ALG_WEP &&
+ !is_multicast_ether_addr(hdr->addr1))
+ rx->key = NULL;
}
- if (rx->fc & IEEE80211_FCTL_PROTECTED && rx->key && rx->u.rx.ra_match) {
+ if (rx->key) {
rx->key->tx_rx_count++;
if (unlikely(rx->local->key_tx_rx_threshold &&
rx->key->tx_rx_count >
while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) {
pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
sent++;
- pkt_data->requeue = 1;
+ pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
dev_queue_xmit(skb);
}
while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) {
"since STA not sleeping anymore\n", dev->name,
MAC_ARG(sta->addr), sta->aid);
#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
- pkt_data->requeue = 1;
+ pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
dev_queue_xmit(skb);
}
sta->last_rx = jiffies;
}
- if (!rx->u.rx.ra_match)
+ if (!(rx->flags & IEEE80211_TXRXD_RXRA_MATCH))
return TXRX_CONTINUE;
sta->rx_fragments++;
sta->rx_bytes += rx->skb->len;
- sta->last_rssi = (sta->last_rssi * 15 +
- rx->u.rx.status->ssi) / 16;
- sta->last_signal = (sta->last_signal * 15 +
- rx->u.rx.status->signal) / 16;
- sta->last_noise = (sta->last_noise * 15 +
- rx->u.rx.status->noise) / 16;
+ sta->last_rssi = rx->u.rx.status->ssi;
+ sta->last_signal = rx->u.rx.status->signal;
+ sta->last_noise = rx->u.rx.status->noise;
if (!(rx->fc & IEEE80211_FCTL_MOREFRAGS)) {
/* Change STA power saving mode only in the end of a frame
{
if (!rx->sta || !(rx->fc & IEEE80211_FCTL_PROTECTED) ||
(rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA ||
- !rx->key || rx->key->alg != ALG_WEP || !rx->u.rx.ra_match)
+ !rx->key || rx->key->conf.alg != ALG_WEP ||
+ !(rx->flags & IEEE80211_TXRXD_RXRA_MATCH))
return TXRX_CONTINUE;
/* Check for weak IVs, if hwaccel did not remove IV from the frame */
- if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) ||
- rx->key->force_sw_encrypt) {
- u8 *iv = ieee80211_wep_is_weak_iv(rx->skb, rx->key);
- if (iv) {
+ if (!(rx->u.rx.status->flag & RX_FLAG_IV_STRIPPED) ||
+ !(rx->u.rx.status->flag & RX_FLAG_DECRYPTED))
+ if (ieee80211_wep_is_weak_iv(rx->skb, rx->key))
rx->sta->wep_weak_iv_count++;
- }
- }
return TXRX_CONTINUE;
}
static ieee80211_txrx_result
ieee80211_rx_h_wep_decrypt(struct ieee80211_txrx_data *rx)
{
- /* If the device handles decryption totally, skip this test */
- if (rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP)
- return TXRX_CONTINUE;
-
- if ((rx->key && rx->key->alg != ALG_WEP) ||
+ if ((rx->key && rx->key->conf.alg != ALG_WEP) ||
!(rx->fc & IEEE80211_FCTL_PROTECTED) ||
((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
return TXRX_CONTINUE;
if (!rx->key) {
- printk(KERN_DEBUG "%s: RX WEP frame, but no key set\n",
- rx->dev->name);
+ if (net_ratelimit())
+ printk(KERN_DEBUG "%s: RX WEP frame, but no key set\n",
+ rx->dev->name);
return TXRX_DROP;
}
- if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED) ||
- rx->key->force_sw_encrypt) {
+ if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED)) {
if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key)) {
- printk(KERN_DEBUG "%s: RX WEP frame, decrypt "
- "failed\n", rx->dev->name);
+ if (net_ratelimit())
+ printk(KERN_DEBUG "%s: RX WEP frame, decrypt "
+ "failed\n", rx->dev->name);
return TXRX_DROP;
}
- } else if (rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) {
+ } else if (!(rx->u.rx.status->flag & RX_FLAG_IV_STRIPPED)) {
ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key);
/* remove ICV */
skb_trim(rx->skb, rx->skb->len - 4);
/* This is the first fragment of a new frame. */
entry = ieee80211_reassemble_add(rx->sdata, frag, seq,
rx->u.rx.queue, &(rx->skb));
- if (rx->key && rx->key->alg == ALG_CCMP &&
+ if (rx->key && rx->key->conf.alg == ALG_CCMP &&
(rx->fc & IEEE80211_FCTL_PROTECTED)) {
/* Store CCMP PN so that we can verify that the next
* fragment has a sequential PN value. */
if (entry->ccmp) {
int i;
u8 pn[CCMP_PN_LEN], *rpn;
- if (!rx->key || rx->key->alg != ALG_CCMP)
+ if (!rx->key || rx->key->conf.alg != ALG_CCMP)
return TXRX_DROP;
memcpy(pn, entry->last_pn, CCMP_PN_LEN);
for (i = CCMP_PN_LEN - 1; i >= 0; i--) {
}
rpn = rx->key->u.ccmp.rx_pn[rx->u.rx.queue];
if (memcmp(pn, rpn, CCMP_PN_LEN) != 0) {
- printk(KERN_DEBUG "%s: defrag: CCMP PN not sequential"
- " A2=" MAC_FMT " PN=%02x%02x%02x%02x%02x%02x "
- "(expected %02x%02x%02x%02x%02x%02x)\n",
- rx->dev->name, MAC_ARG(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 (net_ratelimit())
+ printk(KERN_DEBUG "%s: defrag: CCMP PN not "
+ "sequential A2=" MAC_FMT
+ " PN=%02x%02x%02x%02x%02x%02x "
+ "(expected %02x%02x%02x%02x%02x%02x)\n",
+ rx->dev->name, MAC_ARG(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]);
return TXRX_DROP;
}
memcpy(entry->last_pn, pn, CCMP_PN_LEN);
}
/* Complete frame has been reassembled - process it now */
- rx->fragmented = 1;
+ rx->flags |= IEEE80211_TXRXD_FRAGMENTED;
out:
if (rx->sta)
if (likely(!rx->sta ||
(rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_CTL ||
(rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PSPOLL ||
- !rx->u.rx.ra_match))
+ !(rx->flags & IEEE80211_TXRXD_RXRA_MATCH)))
return TXRX_CONTINUE;
skb = skb_dequeue(&rx->sta->tx_filtered);
ieee80211_rx_h_802_1x_pae(struct ieee80211_txrx_data *rx)
{
if (rx->sdata->eapol && ieee80211_is_eapol(rx->skb) &&
- rx->sdata->type != IEEE80211_IF_TYPE_STA && rx->u.rx.ra_match) {
+ rx->sdata->type != IEEE80211_IF_TYPE_STA &&
+ (rx->flags & IEEE80211_TXRXD_RXRA_MATCH)) {
/* Pass both encrypted and unencrypted EAPOL frames to user
* space for processing. */
if (!rx->local->apdev)
static ieee80211_txrx_result
ieee80211_rx_h_drop_unencrypted(struct ieee80211_txrx_data *rx)
{
- /* If the device handles decryption totally, skip this test */
- if (rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP)
+ /*
+ * Pass through unencrypted frames if the hardware has
+ * decrypted them already.
+ */
+ if (rx->u.rx.status->flag & RX_FLAG_DECRYPTED)
return TXRX_CONTINUE;
/* Drop unencrypted frames if key is set. */
(rx->key || rx->sdata->drop_unencrypted) &&
(rx->sdata->eapol == 0 ||
!ieee80211_is_eapol(rx->skb)))) {
- printk(KERN_DEBUG "%s: RX non-WEP frame, but expected "
- "encryption\n", rx->dev->name);
+ if (net_ratelimit())
+ printk(KERN_DEBUG "%s: RX non-WEP frame, but expected "
+ "encryption\n", rx->dev->name);
return TXRX_DROP;
}
return TXRX_CONTINUE;
if (unlikely(sdata->type != IEEE80211_IF_TYPE_AP &&
sdata->type != IEEE80211_IF_TYPE_VLAN)) {
- printk(KERN_DEBUG "%s: dropped ToDS frame (BSSID="
- MAC_FMT " SA=" MAC_FMT " DA=" MAC_FMT ")\n",
- dev->name, MAC_ARG(hdr->addr1),
- MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3));
+ if (net_ratelimit())
+ printk(KERN_DEBUG "%s: dropped ToDS frame "
+ "(BSSID=" MAC_FMT
+ " SA=" MAC_FMT
+ " DA=" MAC_FMT ")\n",
+ dev->name,
+ MAC_ARG(hdr->addr1),
+ MAC_ARG(hdr->addr2),
+ MAC_ARG(hdr->addr3));
return TXRX_DROP;
}
break;
memcpy(src, hdr->addr4, ETH_ALEN);
if (unlikely(sdata->type != IEEE80211_IF_TYPE_WDS)) {
- printk(KERN_DEBUG "%s: dropped FromDS&ToDS frame (RA="
- MAC_FMT " TA=" MAC_FMT " DA=" MAC_FMT " SA="
- MAC_FMT ")\n",
- rx->dev->name, MAC_ARG(hdr->addr1),
- MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3),
- MAC_ARG(hdr->addr4));
+ if (net_ratelimit())
+ printk(KERN_DEBUG "%s: dropped FromDS&ToDS "
+ "frame (RA=" MAC_FMT
+ " TA=" MAC_FMT " DA=" MAC_FMT
+ " SA=" MAC_FMT ")\n",
+ rx->dev->name,
+ MAC_ARG(hdr->addr1),
+ MAC_ARG(hdr->addr2),
+ MAC_ARG(hdr->addr3),
+ MAC_ARG(hdr->addr4));
return TXRX_DROP;
}
break;
memcpy(dst, hdr->addr1, ETH_ALEN);
memcpy(src, hdr->addr3, ETH_ALEN);
- if (sdata->type != IEEE80211_IF_TYPE_STA) {
+ if (sdata->type != IEEE80211_IF_TYPE_STA ||
+ (is_multicast_ether_addr(dst) &&
+ !compare_ether_addr(src, dev->dev_addr)))
return TXRX_DROP;
- }
break;
case 0:
/* DA SA BSSID */
sdata->stats.rx_bytes += skb->len;
if (local->bridge_packets && (sdata->type == IEEE80211_IF_TYPE_AP
- || sdata->type == IEEE80211_IF_TYPE_VLAN) && rx->u.rx.ra_match) {
+ || sdata->type == IEEE80211_IF_TYPE_VLAN) &&
+ (rx->flags & IEEE80211_TXRXD_RXRA_MATCH)) {
if (is_multicast_ether_addr(skb->data)) {
/* send multicast frames both to higher layers in
* local net stack and back to the wireless media */
skb2 = skb_copy(skb, GFP_ATOMIC);
- if (!skb2)
+ if (!skb2 && net_ratelimit())
printk(KERN_DEBUG "%s: failed to clone "
"multicast frame\n", dev->name);
} else {
struct sta_info *dsta;
dsta = sta_info_get(local, skb->data);
if (dsta && !dsta->dev) {
- printk(KERN_DEBUG "Station with null dev "
- "structure!\n");
+ if (net_ratelimit())
+ printk(KERN_DEBUG "Station with null "
+ "dev structure!\n");
} else if (dsta && dsta->dev == dev) {
/* Destination station is associated to this
* AP, so send the frame directly to it and
{
struct ieee80211_sub_if_data *sdata;
- if (!rx->u.rx.ra_match)
+ if (!(rx->flags & IEEE80211_TXRXD_RXRA_MATCH))
return TXRX_DROP;
sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
/* TODO: verify that this is not triggered by fragmented
* frames (hw does not verify MIC for them). */
- printk(KERN_DEBUG "%s: TKIP hwaccel reported Michael MIC "
- "failure from " MAC_FMT " to " MAC_FMT " keyidx=%d\n",
- dev->name, MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr1), keyidx);
+ if (net_ratelimit())
+ printk(KERN_DEBUG "%s: TKIP hwaccel reported Michael MIC "
+ "failure from " MAC_FMT " to " MAC_FMT " keyidx=%d\n",
+ dev->name, MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr1),
+ keyidx);
if (!sta) {
/* Some hardware versions seem to generate incorrect
* Michael MIC reports; ignore them to avoid triggering
* countermeasures. */
- printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
- "error for unknown address " MAC_FMT "\n",
- dev->name, MAC_ARG(hdr->addr2));
+ if (net_ratelimit())
+ printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
+ "error for unknown address " MAC_FMT "\n",
+ dev->name, MAC_ARG(hdr->addr2));
goto ignore;
}
if (!(rx->fc & IEEE80211_FCTL_PROTECTED)) {
- printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
- "error for a frame with no ISWEP flag (src "
- MAC_FMT ")\n", dev->name, MAC_ARG(hdr->addr2));
+ if (net_ratelimit())
+ printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
+ "error for a frame with no ISWEP flag (src "
+ MAC_FMT ")\n", dev->name, MAC_ARG(hdr->addr2));
goto ignore;
}
- if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) &&
- rx->sdata->type == IEEE80211_IF_TYPE_AP) {
- keyidx = ieee80211_wep_get_keyidx(rx->skb);
+ if (rx->sdata->type == IEEE80211_IF_TYPE_AP && keyidx) {
/* AP with Pairwise keys support 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 BSS. */
- if (keyidx) {
+ if (net_ratelimit())
printk(KERN_DEBUG "%s: ignored Michael MIC error for "
- "a frame with non-zero keyidx (%d) (src " MAC_FMT
- ")\n", dev->name, keyidx, MAC_ARG(hdr->addr2));
- goto ignore;
- }
+ "a frame with non-zero keyidx (%d)"
+ " (src " MAC_FMT ")\n", dev->name, keyidx,
+ MAC_ARG(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)) {
- printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
- "error for a frame that cannot be encrypted "
- "(fc=0x%04x) (src " MAC_FMT ")\n",
- dev->name, rx->fc, MAC_ARG(hdr->addr2));
+ if (net_ratelimit())
+ printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
+ "error for a frame that cannot be encrypted "
+ "(fc=0x%04x) (src " MAC_FMT ")\n",
+ dev->name, rx->fc, MAC_ARG(hdr->addr2));
goto ignore;
}
- do {
- union iwreq_data wrqu;
- char *buf = kmalloc(128, GFP_ATOMIC);
- if (!buf)
- break;
-
- /* TODO: needed parameters: count, key type, TSC */
- sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
- "keyid=%d %scast addr=" MAC_FMT ")",
- keyidx, hdr->addr1[0] & 0x01 ? "broad" : "uni",
- MAC_ARG(hdr->addr2));
- memset(&wrqu, 0, sizeof(wrqu));
- wrqu.data.length = strlen(buf);
- wireless_send_event(rx->dev, IWEVCUSTOM, &wrqu, buf);
- kfree(buf);
- } while (0);
-
/* TODO: consider verifying the MIC error report with software
* implementation if we get too many spurious reports from the
* hardware. */
- if (!rx->local->apdev)
- goto ignore;
- ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status,
- ieee80211_msg_michael_mic_failure);
- return;
+ mac80211_ev_michael_mic_failure(rx->dev, keyidx, hdr);
ignore:
dev_kfree_skb(rx->skb);
rx->skb = NULL;
ieee80211_rx_h_monitor,
ieee80211_rx_h_passive_scan,
ieee80211_rx_h_check,
+ ieee80211_rx_h_load_key,
ieee80211_rx_h_sta_process,
ieee80211_rx_h_ccmp_decrypt,
ieee80211_rx_h_tkip_decrypt,
/* main receive path */
+static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata,
+ u8 *bssid, struct ieee80211_txrx_data *rx,
+ struct ieee80211_hdr *hdr)
+{
+ int multicast = is_multicast_ether_addr(hdr->addr1);
+
+ switch (sdata->type) {
+ case IEEE80211_IF_TYPE_STA:
+ if (!bssid)
+ return 0;
+ if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid)) {
+ if (!(rx->flags & IEEE80211_TXRXD_RXIN_SCAN))
+ return 0;
+ rx->flags &= ~IEEE80211_TXRXD_RXRA_MATCH;
+ } else if (!multicast &&
+ compare_ether_addr(sdata->dev->dev_addr,
+ hdr->addr1) != 0) {
+ if (!(sdata->flags & IEEE80211_SDATA_PROMISC))
+ return 0;
+ rx->flags &= ~IEEE80211_TXRXD_RXRA_MATCH;
+ }
+ break;
+ case IEEE80211_IF_TYPE_IBSS:
+ if (!bssid)
+ return 0;
+ if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid)) {
+ if (!(rx->flags & IEEE80211_TXRXD_RXIN_SCAN))
+ return 0;
+ rx->flags &= ~IEEE80211_TXRXD_RXRA_MATCH;
+ } else if (!multicast &&
+ compare_ether_addr(sdata->dev->dev_addr,
+ hdr->addr1) != 0) {
+ if (!(sdata->flags & IEEE80211_SDATA_PROMISC))
+ return 0;
+ rx->flags &= ~IEEE80211_TXRXD_RXRA_MATCH;
+ } else if (!rx->sta)
+ rx->sta = ieee80211_ibss_add_sta(sdata->dev, rx->skb,
+ bssid, hdr->addr2);
+ break;
+ case IEEE80211_IF_TYPE_AP:
+ if (!bssid) {
+ if (compare_ether_addr(sdata->dev->dev_addr,
+ hdr->addr1))
+ return 0;
+ } else if (!ieee80211_bssid_match(bssid,
+ sdata->dev->dev_addr)) {
+ if (!(rx->flags & IEEE80211_TXRXD_RXIN_SCAN))
+ return 0;
+ rx->flags &= ~IEEE80211_TXRXD_RXRA_MATCH;
+ }
+ if (sdata->dev == sdata->local->mdev &&
+ !(rx->flags & IEEE80211_TXRXD_RXIN_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)
+ return 0;
+ if (compare_ether_addr(sdata->u.wds.remote_addr, hdr->addr2))
+ return 0;
+ break;
+ }
+
+ return 1;
+}
+
/*
* This is the receive path handler. It is called by a low level driver when an
* 802.11 MPDU is received from the hardware.
struct ieee80211_hdr *hdr;
struct ieee80211_txrx_data rx;
u16 type;
- int multicast;
- int radiotap_len = 0;
+ int radiotap_len = 0, prepres;
struct ieee80211_sub_if_data *prev = NULL;
struct sk_buff *skb_new;
u8 *bssid;
skb_pull(skb, radiotap_len);
}
+ /*
+ * key references are protected using RCU and this requires that
+ * we are in a read-site RCU section during receive processing
+ */
+ rcu_read_lock();
+
hdr = (struct ieee80211_hdr *) skb->data;
memset(&rx, 0, sizeof(rx));
rx.skb = skb;
type = rx.fc & IEEE80211_FCTL_FTYPE;
if (type == IEEE80211_FTYPE_DATA || type == IEEE80211_FTYPE_MGMT)
local->dot11ReceivedFragmentCount++;
- multicast = is_multicast_ether_addr(hdr->addr1);
- if (skb->len >= 16)
+ if (skb->len >= 16) {
sta = rx.sta = sta_info_get(local, hdr->addr2);
- else
+ if (sta) {
+ rx.dev = rx.sta->dev;
+ rx.sdata = IEEE80211_DEV_TO_SUB_IF(rx.dev);
+ }
+ } else
sta = rx.sta = NULL;
- if (sta) {
- rx.dev = sta->dev;
- rx.sdata = IEEE80211_DEV_TO_SUB_IF(rx.dev);
- }
-
if ((status->flag & RX_FLAG_MMIC_ERROR)) {
ieee80211_rx_michael_mic_report(local->mdev, hdr, sta, &rx);
goto end;
}
if (unlikely(local->sta_scanning))
- rx.u.rx.in_scan = 1;
+ rx.flags |= IEEE80211_TXRXD_RXIN_SCAN;
if (__ieee80211_invoke_rx_handlers(local, local->rx_pre_handlers, &rx,
sta) != TXRX_CONTINUE)
skb = rx.skb;
skb_push(skb, radiotap_len);
- if (sta && !sta->assoc_ap && !(sta->flags & WLAN_STA_WDS) &&
- !local->iff_promiscs && !multicast) {
- rx.u.rx.ra_match = 1;
+ if (sta && !(sta->flags & (WLAN_STA_WDS | WLAN_STA_ASSOC_AP)) &&
+ !local->iff_promiscs && !is_multicast_ether_addr(hdr->addr1)) {
+ rx.flags |= IEEE80211_TXRXD_RXRA_MATCH;
ieee80211_invoke_rx_handlers(local, local->rx_handlers, &rx,
- sta);
+ rx.sta);
sta_info_put(sta);
+ rcu_read_unlock();
return;
}
read_lock(&local->sub_if_lock);
list_for_each_entry(sdata, &local->sub_if_list, list) {
- rx.u.rx.ra_match = 1;
- switch (sdata->type) {
- case IEEE80211_IF_TYPE_STA:
- if (!bssid)
- continue;
- if (!ieee80211_bssid_match(bssid,
- sdata->u.sta.bssid)) {
- if (!rx.u.rx.in_scan)
- continue;
- rx.u.rx.ra_match = 0;
- } else if (!multicast &&
- compare_ether_addr(sdata->dev->dev_addr,
- hdr->addr1) != 0) {
- if (!sdata->promisc)
- continue;
- rx.u.rx.ra_match = 0;
- }
- break;
- case IEEE80211_IF_TYPE_IBSS:
- if (!bssid)
- continue;
- if (!ieee80211_bssid_match(bssid,
- sdata->u.sta.bssid)) {
- if (!rx.u.rx.in_scan)
- continue;
- rx.u.rx.ra_match = 0;
- } else if (!multicast &&
- compare_ether_addr(sdata->dev->dev_addr,
- hdr->addr1) != 0) {
- if (!sdata->promisc)
- continue;
- rx.u.rx.ra_match = 0;
- } else if (!sta)
- sta = rx.sta =
- ieee80211_ibss_add_sta(sdata->dev,
- skb, bssid,
- hdr->addr2);
- break;
- case IEEE80211_IF_TYPE_AP:
- if (!bssid) {
- if (compare_ether_addr(sdata->dev->dev_addr,
- hdr->addr1))
- continue;
- } else if (!ieee80211_bssid_match(bssid,
- sdata->dev->dev_addr)) {
- if (!rx.u.rx.in_scan)
- continue;
- rx.u.rx.ra_match = 0;
- }
- if (sdata->dev == local->mdev && !rx.u.rx.in_scan)
- /* do not receive anything via
- * master device when not scanning */
- continue;
- break;
- case IEEE80211_IF_TYPE_WDS:
- if (bssid ||
- (rx.fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
- continue;
- if (compare_ether_addr(sdata->u.wds.remote_addr,
- hdr->addr2))
- continue;
- break;
+ rx.flags |= IEEE80211_TXRXD_RXRA_MATCH;
+
+ if (!netif_running(sdata->dev))
+ continue;
+
+ prepres = prepare_for_handlers(sdata, bssid, &rx, hdr);
+ /* prepare_for_handlers can change sta */
+ sta = rx.sta;
+
+ if (!prepres)
+ 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;
}
- if (prev) {
- skb_new = skb_copy(skb, GFP_ATOMIC);
- if (!skb_new) {
- if (net_ratelimit())
- printk(KERN_DEBUG "%s: failed to copy "
- "multicast frame for %s",
- local->mdev->name, prev->dev->name);
- continue;
- }
- rx.skb = skb_new;
- rx.dev = prev->dev;
- rx.sdata = prev;
- ieee80211_invoke_rx_handlers(local, local->rx_handlers,
- &rx, sta);
+ /*
+ * 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",
+ local->mdev->name, prev->dev->name);
+ continue;
}
+ rx.skb = skb_new;
+ rx.dev = prev->dev;
+ rx.sdata = prev;
+ ieee80211_invoke_rx_handlers(local, local->rx_handlers,
+ &rx, sta);
prev = sdata;
}
if (prev) {
read_unlock(&local->sub_if_lock);
end:
+ rcu_read_unlock();
+
if (sta)
sta_info_put(sta);
}
projects / linux-2.6 / blobdiff