return 1;
if (unlikely(skb->len < 16 + present_fcs_len + radiotap_len))
return 1;
- if ((hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
- cpu_to_le16(IEEE80211_FTYPE_CTL))
+ 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)))
return 1;
return 0;
}
struct ieee80211_sub_if_data *sdata;
struct ieee80211_rate *rate;
int needed_headroom = 0;
- struct ieee80211_rtap_hdr {
- struct ieee80211_radiotap_header hdr;
+ struct ieee80211_radiotap_header *rthdr;
+ __le64 *rttsft = NULL;
+ struct ieee80211_rtap_fixed_data {
u8 flags;
u8 rate;
__le16 chan_freq;
u8 antsignal;
u8 padding_for_rxflags;
__le16 rx_flags;
- } __attribute__ ((packed)) *rthdr;
+ } __attribute__ ((packed)) *rtfixed;
struct sk_buff *skb, *skb2;
struct net_device *prev_dev = NULL;
int present_fcs_len = 0;
if (status->flag & RX_FLAG_RADIOTAP)
rtap_len = ieee80211_get_radiotap_len(origskb->data);
else
- needed_headroom = sizeof(*rthdr);
+ /* room for radiotap header, always present fields and TSFT */
+ needed_headroom = sizeof(*rthdr) + sizeof(*rtfixed) + 8;
if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
present_fcs_len = FCS_LEN;
* them allocate enough headroom to start with.
*/
if (skb_headroom(skb) < needed_headroom &&
- pskb_expand_head(skb, sizeof(*rthdr), 0, GFP_ATOMIC)) {
+ pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) {
dev_kfree_skb(skb);
return NULL;
}
/* 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));
- rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
- rthdr->hdr.it_present =
+ 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));
- rthdr->flags = local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS ?
- IEEE80211_RADIOTAP_F_FCS : 0;
+ 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 */
- rthdr->rx_flags = 0;
+ rtfixed->rx_flags = 0;
if (status->flag &
(RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC))
- rthdr->rx_flags |=
+ rtfixed->rx_flags |=
cpu_to_le16(IEEE80211_RADIOTAP_F_RX_BADFCS);
rate = ieee80211_get_rate(local, status->phymode,
status->rate);
if (rate)
- rthdr->rate = rate->rate / 5;
+ rtfixed->rate = rate->rate / 5;
- rthdr->chan_freq = cpu_to_le16(status->freq);
+ rtfixed->chan_freq = cpu_to_le16(status->freq);
if (status->phymode == MODE_IEEE80211A)
- rthdr->chan_flags =
+ rtfixed->chan_flags =
cpu_to_le16(IEEE80211_CHAN_OFDM |
IEEE80211_CHAN_5GHZ);
else
- rthdr->chan_flags =
+ rtfixed->chan_flags =
cpu_to_le16(IEEE80211_CHAN_DYN |
IEEE80211_CHAN_2GHZ);
- rthdr->antsignal = status->ssi;
+ rtfixed->antsignal = status->ssi;
+ rthdr->it_len = cpu_to_le16(rtap_len);
}
- skb_set_mac_header(skb, 0);
+ skb_reset_mac_header(skb);
skb->ip_summed = CHECKSUM_UNNECESSARY;
skb->pkt_type = PACKET_OTHERHOST;
skb->protocol = htons(ETH_P_802_2);
return TXRX_CONTINUE;
}
-static ieee80211_txrx_result
-ieee80211_rx_h_load_stats(struct ieee80211_txrx_data *rx)
+
+u32 ieee80211_rx_load_stats(struct ieee80211_local *local,
+ struct sk_buff *skb,
+ struct ieee80211_rx_status *status)
{
- struct ieee80211_local *local = rx->local;
- struct sk_buff *skb = rx->skb;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
u32 load = 0, hdrtime;
struct ieee80211_rate *rate;
rate = &mode->rates[0];
for (i = 0; i < mode->num_rates; i++) {
- if (mode->rates[i].val == rx->u.rx.status->rate) {
+ if (mode->rates[i].val == status->rate) {
rate = &mode->rates[i];
break;
}
/* Divide channel_use by 8 to avoid wrapping around the counter */
load >>= CHAN_UTIL_SHIFT;
local->channel_use_raw += load;
- rx->u.rx.load = load;
- return TXRX_CONTINUE;
+ return load;
}
ieee80211_rx_handler ieee80211_rx_pre_handlers[] =
{
ieee80211_rx_h_parse_qos,
- ieee80211_rx_h_load_stats,
NULL
};
return TXRX_DROP;
}
- 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;
- else if (is_multicast_ether_addr(hdr->addr1)) {
- if (is_broadcast_ether_addr(hdr->addr1))
- rx->skb->pkt_type = PACKET_BROADCAST;
- else
- rx->skb->pkt_type = PACKET_MULTICAST;
- } else
- rx->skb->pkt_type = PACKET_OTHERHOST;
-
/* Drop disallowed frame classes based on STA auth/assoc state;
* IEEE 802.11, Chap 5.5.
*
static ieee80211_txrx_result
ieee80211_rx_h_ps_poll(struct ieee80211_txrx_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);
!(rx->flags & IEEE80211_TXRXD_RXRA_MATCH)))
return TXRX_CONTINUE;
+ if ((sdata->type != IEEE80211_IF_TYPE_AP) &&
+ (sdata->type != IEEE80211_IF_TYPE_VLAN))
+ return TXRX_DROP;
+
skb = skb_dequeue(&rx->sta->tx_filtered);
if (!skb) {
skb = skb_dequeue(&rx->sta->ps_tx_buf);
}
static int
-ieee80211_drop_802_1x_pae(struct ieee80211_txrx_data *rx, int hdrlen)
+ieee80211_802_1x_port_control(struct ieee80211_txrx_data *rx)
{
- if (rx->sdata->eapol && ieee80211_is_eapol(rx->skb, hdrlen) &&
- rx->sdata->type != IEEE80211_IF_TYPE_STA &&
- (rx->flags & IEEE80211_TXRXD_RXRA_MATCH))
- return 0;
-
- if (unlikely(rx->sdata->ieee802_1x &&
- (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
- (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC &&
- (!rx->sta || !(rx->sta->flags & WLAN_STA_AUTHORIZED)) &&
- !ieee80211_is_eapol(rx->skb, hdrlen))) {
+ if (unlikely(rx->sdata->ieee802_1x_pac &&
+ (!rx->sta || !(rx->sta->flags & WLAN_STA_AUTHORIZED)))) {
#ifdef CONFIG_MAC80211_DEBUG
printk(KERN_DEBUG "%s: dropped frame "
"(unauthorized port)\n", rx->dev->name);
}
static int
-ieee80211_drop_unencrypted(struct ieee80211_txrx_data *rx, int hdrlen)
+ieee80211_drop_unencrypted(struct ieee80211_txrx_data *rx)
{
/*
* Pass through unencrypted frames if the hardware has
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) &&
- (rx->sdata->eapol == 0 ||
- !ieee80211_is_eapol(rx->skb, hdrlen)))) {
+ (rx->key || rx->sdata->drop_unencrypted))) {
if (net_ratelimit())
printk(KERN_DEBUG "%s: RX non-WEP frame, but expected "
"encryption\n", rx->dev->name);
} else {
struct ethhdr *ehdr;
__be16 len;
+
skb_pull(skb, hdrlen);
len = htons(skb->len);
ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr));
return 0;
}
+/*
+ * requires that rx->skb is a frame with ethernet header
+ */
+static bool ieee80211_frame_allowed(struct ieee80211_txrx_data *rx)
+{
+ static const u8 pae_group_addr[ETH_ALEN]
+ = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 };
+ struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
+
+ /*
+ * Allow EAPOL frames to us/the PAE group address regardless
+ * 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, pae_group_addr) == 0))
+ return true;
+
+ if (ieee80211_802_1x_port_control(rx) ||
+ ieee80211_drop_unencrypted(rx))
+ return false;
+
+ return true;
+}
+
+/*
+ * requires that rx->skb is a frame with ethernet header
+ */
static void
ieee80211_deliver_skb(struct ieee80211_txrx_data *rx)
{
struct ieee80211_local *local = rx->local;
struct sk_buff *skb, *xmit_skb;
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
+ struct sta_info *dsta;
skb = rx->skb;
xmit_skb = NULL;
- if (local->bridge_packets && (sdata->type == IEEE80211_IF_TYPE_AP
- || sdata->type == IEEE80211_IF_TYPE_VLAN) &&
+ if (local->bridge_packets && (sdata->type == IEEE80211_IF_TYPE_AP ||
+ 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 */
+ if (is_multicast_ether_addr(ehdr->h_dest)) {
+ /*
+ * send multicast frames both to higher layers in
+ * local net stack and back to the wireless medium
+ */
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 {
- struct sta_info *dsta;
dsta = sta_info_get(local, skb->data);
- if (dsta && !dsta->dev) {
- 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
- * do not pass the frame to local net stack.
+ if (dsta && dsta->dev == dev) {
+ /*
+ * The destination station is associated to
+ * this AP (in this VLAN), so send the frame
+ * directly to it and do not pass it to local
+ * net stack.
*/
xmit_skb = skb;
skb = NULL;
if (xmit_skb) {
/* send to wireless media */
xmit_skb->protocol = htons(ETH_P_802_3);
- skb_set_network_header(xmit_skb, 0);
- skb_set_mac_header(xmit_skb, 0);
+ skb_reset_network_header(xmit_skb);
+ skb_reset_mac_header(xmit_skb);
dev_queue_xmit(xmit_skb);
}
}
}
}
- skb_set_network_header(frame, 0);
+ skb_reset_network_header(frame);
frame->dev = dev;
frame->priority = skb->priority;
rx->skb = frame;
- if ((ieee80211_drop_802_1x_pae(rx, 0)) ||
- (ieee80211_drop_unencrypted(rx, 0))) {
- if (skb == frame) /* last frame */
- return TXRX_DROP;
- dev_kfree_skb(frame);
- continue;
- }
-
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)) {
+ 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, sizeof(__be16)),
+ &len, sizeof(__be16));
memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN);
memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
}
+ if (!ieee80211_frame_allowed(rx)) {
+ if (skb == frame) /* last frame */
+ return TXRX_DROP;
+ dev_kfree_skb(frame);
+ continue;
+ }
ieee80211_deliver_skb(rx);
}
{
struct net_device *dev = rx->dev;
u16 fc;
- int err, hdrlen;
+ int err;
fc = rx->fc;
if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA))
if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
return TXRX_DROP;
- hdrlen = ieee80211_get_hdrlen(fc);
-
- if ((ieee80211_drop_802_1x_pae(rx, hdrlen)) ||
- (ieee80211_drop_unencrypted(rx, hdrlen)))
- return TXRX_DROP;
-
err = ieee80211_data_to_8023(rx);
if (unlikely(err))
return TXRX_DROP;
+ if (!ieee80211_frame_allowed(rx))
+ return TXRX_DROP;
+
rx->skb->dev = dev;
dev->stats.rx_packets++;
}
/*
- * This is the receive path handler. It is called by a low level driver when an
- * 802.11 MPDU is received from the hardware.
+ * This is the actual Rx frames handler. as it blongs to Rx path it must
+ * be called with rcu_read_lock protection.
*/
-void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
- struct ieee80211_rx_status *status)
+void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, struct sk_buff *skb,
+ struct ieee80211_rx_status *status, u32 load)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_sub_if_data *sdata;
struct ieee80211_hdr *hdr;
struct ieee80211_txrx_data rx;
u16 type;
- int prepres;
+ int prepares;
struct ieee80211_sub_if_data *prev = NULL;
struct sk_buff *skb_new;
u8 *bssid;
int hdrlen;
- /*
- * key references and virtual interfaces are protected using RCU
- * and this requires that we are in a read-side RCU section during
- * receive processing
- */
- rcu_read_lock();
-
- /*
- * Frames with failed FCS/PLCP checksum are not returned,
- * all other frames are returned without radiotap header
- * if it was previously present.
- * Also, frames with less than 16 bytes are dropped.
- */
- skb = ieee80211_rx_monitor(local, skb, status);
- if (!skb) {
- rcu_read_unlock();
- return;
- }
-
hdr = (struct ieee80211_hdr *) skb->data;
memset(&rx, 0, sizeof(rx));
rx.skb = skb;
rx.local = local;
rx.u.rx.status = status;
+ rx.u.rx.load = load;
rx.fc = le16_to_cpu(hdr->frame_control);
type = rx.fc & IEEE80211_FCTL_FTYPE;
continue;
rx.flags |= IEEE80211_TXRXD_RXRA_MATCH;
- prepres = prepare_for_handlers(sdata, bssid, &rx, hdr);
+ prepares = prepare_for_handlers(sdata, bssid, &rx, hdr);
/* prepare_for_handlers can change sta */
sta = rx.sta;
- if (!prepres)
+ if (!prepares)
continue;
/*
prev->dev->name);
continue;
}
+ rx.fc = le16_to_cpu(hdr->frame_control);
rx.skb = skb_new;
rx.dev = prev->dev;
rx.sdata = prev;
prev = sdata;
}
if (prev) {
+ rx.fc = le16_to_cpu(hdr->frame_control);
rx.skb = skb;
rx.dev = prev->dev;
rx.sdata = prev;
dev_kfree_skb(skb);
end:
- rcu_read_unlock();
-
if (sta)
sta_info_put(sta);
}
+
+/*
+ * 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)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ u32 pkt_load;
+
+ /*
+ * key references and virtual interfaces are protected using RCU
+ * and this requires that we are in a read-side RCU section during
+ * receive processing
+ */
+ rcu_read_lock();
+
+ /*
+ * Frames with failed FCS/PLCP checksum are not returned,
+ * all other frames are returned without radiotap header
+ * if it was previously present.
+ * Also, frames with less than 16 bytes are dropped.
+ */
+ skb = ieee80211_rx_monitor(local, skb, status);
+ if (!skb) {
+ rcu_read_unlock();
+ return;
+ }
+
+ pkt_load = ieee80211_rx_load_stats(local, skb, status);
+
+ __ieee80211_rx_handle_packet(hw, skb, status, pkt_load);
+
+ rcu_read_unlock();
+}
EXPORT_SYMBOL(__ieee80211_rx);
/* This is a version of the rx handler that can be called from hard irq
projects / linux-2.6-omap-h63xx.git / blobdiff