@@ -1258,6 +1258,9 @@ ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info)
* the "0-length PSDU" field included there. The value for it is
* in &struct ieee80211_rx_status. Note that if this value isn't
* known the frame shouldn't be reported.
+ * @RX_FLAG_80211_MCAST: If the receiver address (addr1) in the frame is
+ * multicast. This is used with the data frames by the drivers
+ * supporting 802.11 hdr decap offload.
*/
enum mac80211_rx_flags {
RX_FLAG_MMIC_ERROR = BIT(0),
@@ -1290,6 +1293,7 @@ enum mac80211_rx_flags {
RX_FLAG_RADIOTAP_HE_MU = BIT(27),
RX_FLAG_RADIOTAP_LSIG = BIT(28),
RX_FLAG_NO_PSDU = BIT(29),
+ RX_FLAG_80211_MCAST = BIT(30),
};
/**
@@ -4442,6 +4446,22 @@ static inline void ieee80211_rx_ni(struct ieee80211_hw *hw,
}
/**
+ * ieee80211_rx_8023 - Receive frames in 802.11 decapsulated format
+ *
+ * Low level driver capable of 802.11 header decap uses this function. The frame
+ * will be in ethernet format.
+ * This function may not be called in IRQ context. Calls to this function
+ * for a single hardware must be synchronized against each other.
+ *
+ * @hw: the hardware this frame came in on
+ * @sta : the station the frame was received from, must not be %NULL
+ * @skb: the buffer to receive, owned by mac80211 after this call
+ * @napi: the NAPI context
+ */
+void ieee80211_rx_8023(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
+ struct sk_buff *skb, struct napi_struct *napi);
+
+/**
* ieee80211_sta_ps_transition - PS transition for connected sta
*
* When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS
@@ -2508,13 +2508,14 @@ __ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control)
return 0;
}
+static const u8 pae_group_addr[ETH_ALEN] __aligned(2) = {0x01, 0x80, 0xC2, 0x00,
+ 0x00, 0x03};
+
/*
* requires that rx->skb is a frame with ethernet header
*/
static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc)
{
- static const u8 pae_group_addr[ETH_ALEN] __aligned(2)
- = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 };
struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
/*
@@ -2570,6 +2571,7 @@ ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
struct sk_buff *skb, *xmit_skb;
struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
struct sta_info *dsta;
+ struct ieee80211_sta_rx_stats *rx_stats;
skb = rx->skb;
xmit_skb = NULL;
@@ -2582,9 +2584,12 @@ ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
* for non-QoS-data frames. Here we know it's a data
* frame, so count MSDUs.
*/
- u64_stats_update_begin(&rx->sta->rx_stats.syncp);
- rx->sta->rx_stats.msdu[rx->seqno_idx]++;
- u64_stats_update_end(&rx->sta->rx_stats.syncp);
+ rx_stats = &rx->sta->rx_stats;
+ if (ieee80211_hw_check(&rx->local->hw, USES_RSS))
+ rx_stats = this_cpu_ptr(rx->sta->pcpu_rx_stats);
+ u64_stats_update_begin(&rx_stats->syncp);
+ rx_stats->msdu[rx->seqno_idx]++;
+ u64_stats_update_end(&rx_stats->syncp);
}
if ((sdata->vif.type == NL80211_IFTYPE_AP ||
@@ -4782,3 +4787,210 @@ void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb)
tasklet_schedule(&local->tasklet);
}
EXPORT_SYMBOL(ieee80211_rx_irqsafe);
+
+/* Receive path for 80211 header decap offloaded data frames */
+
+static void
+ieee80211_rx_handle_8023(struct ieee80211_sub_if_data *sdata,
+ struct sta_info *sta, struct sk_buff *skb,
+ struct napi_struct *napi)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_vif *vif = &sdata->vif;
+ struct net_device *dev = sdata->dev;
+ struct ieee80211_rx_status *status;
+ struct ieee80211_key *key = NULL;
+ struct ieee80211_rx_data rx;
+ int i;
+ struct ethhdr *ehdr;
+ struct ieee80211_sta_rx_stats *stats = &sta->rx_stats;
+ struct ieee80211_supported_band *sband;
+
+ ehdr = (struct ethhdr *)skb->data;
+ status = IEEE80211_SKB_RXCB(skb);
+
+ if (WARN_ON(status->band >= NUM_NL80211_BANDS))
+ goto drop;
+
+ sband = local->hw.wiphy->bands[status->band];
+ if (WARN_ON(!sband))
+ goto drop;
+
+ if (ieee80211_hw_check(&local->hw, USES_RSS))
+ stats = this_cpu_ptr(sta->pcpu_rx_stats);
+
+ /* TODO: Extend ieee80211_rx_8023() with bssid so that Ethernet
+ * encap/decap can be supported in Adhoc interface type as well.
+ * Adhoc interface depends on bssid to update last_rx.
+ */
+ if (vif->type != NL80211_IFTYPE_STATION &&
+ vif->type != NL80211_IFTYPE_AP_VLAN &&
+ vif->type != NL80211_IFTYPE_AP)
+ goto drop;
+
+ if (unlikely(!test_sta_flag(sta, WLAN_STA_AUTHORIZED))) {
+ if (ehdr->h_proto != sdata->control_port_protocol)
+ goto drop;
+ else if (!ether_addr_equal(ehdr->h_dest, vif->addr) &&
+ !ether_addr_equal(ehdr->h_dest, pae_group_addr))
+ goto drop;
+ }
+
+ if (status->flag & RX_FLAG_80211_MCAST) {
+ for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
+ key = rcu_dereference(sta->gtk[i]);
+ if (key)
+ break;
+ }
+ } else {
+ key = rcu_dereference(sta->ptk[sta->ptk_idx]);
+ }
+
+ if (key && unlikely(key->flags & KEY_FLAG_TAINTED))
+ goto drop;
+
+ if (status->flag & RX_FLAG_MMIC_ERROR) {
+ if (key)
+ key->u.tkip.mic_failures++;
+ goto mic_fail;
+ }
+
+#define ETH_RX_CRYPT_FLAGS (RX_FLAG_PN_VALIDATED | RX_FLAG_DECRYPTED)
+
+ if (key && (status->flag & ETH_RX_CRYPT_FLAGS) != ETH_RX_CRYPT_FLAGS)
+ goto drop;
+
+ if (!(status->flag & RX_FLAG_DUP_VALIDATED))
+ goto drop;
+
+ I802_DEBUG_INC(local->dot11ReceivedFragmentCount);
+
+ if (!(status->flag & RX_FLAG_80211_MCAST)) {
+ stats->last_rx = jiffies;
+ stats->last_rate = sta_stats_encode_rate(status);
+ }
+
+ if (sdata->vif.type == NL80211_IFTYPE_STATION &&
+ !(status->flag & RX_FLAG_80211_MCAST))
+ ieee80211_sta_reset_conn_monitor(sdata);
+
+ u64_stats_update_begin(&stats->syncp);
+ stats->fragments++;
+ stats->packets++;
+ stats->bytes += skb->len;
+ u64_stats_update_end(&stats->syncp);
+
+ if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {
+ stats->last_signal = status->signal;
+ if (!ieee80211_hw_check(&local->hw, USES_RSS))
+ ewma_signal_add(&sta->rx_stats_avg.signal,
+ -status->signal);
+ }
+
+ if (status->chains) {
+ stats->chains = status->chains;
+ for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) {
+ int signal = status->chain_signal[i];
+
+ if (!(status->chains & BIT(i)))
+ continue;
+
+ stats->chain_signal_last[i] = signal;
+ if (!ieee80211_hw_check(&local->hw, USES_RSS))
+ ewma_signal_add(&sta->rx_stats_avg.chain_signal[i],
+ -signal);
+ }
+ }
+
+ if (unlikely(ehdr->h_proto == cpu_to_be16(ETH_P_TDLS))) {
+ struct ieee80211_tdls_data *tf = (void *)skb->data;
+
+ if (pskb_may_pull(skb,
+ offsetof(struct ieee80211_tdls_data, u)) &&
+ tf->payload_type == WLAN_TDLS_SNAP_RFTYPE &&
+ tf->category == WLAN_CATEGORY_TDLS &&
+ (tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST ||
+ tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) {
+ skb_queue_tail(&local->skb_queue_tdls_chsw, skb);
+ schedule_work(&local->tdls_chsw_work);
+ return;
+ }
+ }
+
+ memset(&rx, 0, sizeof(rx));
+ rx.skb = skb;
+ rx.sdata = sdata;
+ rx.local = local;
+ rx.sta = sta;
+ rx.napi = napi;
+
+ if (vif->type == NL80211_IFTYPE_AP_VLAN && sdata->bss &&
+ unlikely(ehdr->h_proto == sdata->control_port_protocol)) {
+ sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
+ u.ap);
+ dev = sdata->dev;
+ rx.sdata = sdata;
+ }
+
+ rx.skb->dev = dev;
+
+ /* FIXME: Since rx.seqno_idx is not available for decap offloaded frames
+ * rx msdu stats update at the seqno_idx in ieee80211_deliver_skb()
+ * will always be updated at index 0 and will not be very useful.
+ */
+ ieee80211_deliver_skb(&rx);
+
+ return;
+
+mic_fail:
+
+ cfg80211_michael_mic_failure(sdata->dev, sta->addr,
+ is_multicast_ether_addr(ehdr->h_dest) ?
+ NL80211_KEYTYPE_GROUP :
+ NL80211_KEYTYPE_PAIRWISE,
+ key ? key->conf.keyidx : -1,
+ NULL, GFP_ATOMIC);
+
+drop:
+ stats->dropped++;
+ dev_kfree_skb(skb);
+}
+
+/* Receive path handler that a low level driver supporting 802.11 hdr decap
+ * offload can call. The frame is in ethernet format and the assumption is
+ * all necessary operations like decryption, defrag, deaggregation, etc.
+ * requiring 802.11 headers are already performed in the low level driver
+ * or hardware.
+ */
+void ieee80211_rx_8023(struct ieee80211_hw *hw,
+ struct ieee80211_sta *pubsta, struct sk_buff *skb,
+ struct napi_struct *napi)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct sta_info *sta;
+
+ if (unlikely(local->quiescing || local->suspended))
+ goto drop;
+
+ if (unlikely(local->in_reconfig))
+ goto drop;
+
+ if (WARN_ON(!local->started))
+ goto drop;
+
+ if (!pubsta)
+ goto drop;
+
+ sta = container_of(pubsta, struct sta_info, sta);
+
+ /* TODO: Toggle Rx throughput LED */
+
+ rcu_read_lock();
+ ieee80211_rx_handle_8023(sta->sdata, sta, skb, napi);
+ rcu_read_unlock();
+
+ return;
+drop:
+ kfree_skb(skb);
+}
+EXPORT_SYMBOL(ieee80211_rx_8023);