qcacmn: received packet matches with mld mac address drop it

In extap mode if the received packet matches with mld mac address drop it.
for non IP packets conversion might not be possible,
due to that MEC entry will not be updated, resulting loopback.

Change-Id: I382cb2d525caa8bc23dc6bbadd0575e579645659
CRs-Fixed: 3470318

dp/wifi3.0/be/dp_be_rx.c

@@ -1972,6 +1972,33 @@ done:
 	return nbuf_head;
 }
 
+#ifdef WLAN_FEATURE_11BE_MLO
+/**
+ * check_extap_multicast_loopback() - Check if rx packet is a loopback packet.
+ *
+ * @vdev: vdev on which rx packet is received
+ * @addr: src address of the received packet
+ *
+ */
+static bool check_extap_multicast_loopback(struct dp_vdev *vdev, uint8_t *addr)
+{
+	 /* if src mac addr matches with vdev mac address then drop the pkt */
+	if (!(qdf_mem_cmp(addr, vdev->mac_addr.raw, QDF_MAC_ADDR_SIZE)))
+		return true;
+
+	 /* if src mac addr matches with mld mac address then drop the pkt */
+	if (!(qdf_mem_cmp(addr, vdev->mld_mac_addr.raw, QDF_MAC_ADDR_SIZE)))
+		return true;
+
+	return false;
+}
+#else
+static bool check_extap_multicast_loopback(struct dp_vdev *vdev, uint8_t *addr)
+{
+	return false;
+}
+#endif
+
 QDF_STATUS
 dp_rx_null_q_desc_handle_be(struct dp_soc *soc, qdf_nbuf_t nbuf,
 			    uint8_t *rx_tlv_hdr, uint8_t pool_id,
@@ -2201,6 +2228,18 @@ dp_rx_null_q_desc_handle_be(struct dp_soc *soc, qdf_nbuf_t nbuf,
 	if (qdf_unlikely(dp_rx_err_cce_drop(soc, vdev, nbuf, rx_tlv_hdr)))
 		goto drop_nbuf;
 
+	/*
+	 * In extap mode if the received packet matches with mld mac address
+	 * drop it. For non IP packets conversion might not be possible
+	 * due to that MEC entry will not be updated, resulting loopback.
+	 */
+	if (qdf_unlikely(check_extap_multicast_loopback(vdev,
+							eh->ether_shost))) {
+		DP_PEER_PER_PKT_STATS_INC_PKT(txrx_peer, rx.mec_drop, 1,
+					      qdf_nbuf_len(nbuf), link_id);
+		goto drop_nbuf;
+	}
+
 	if (qdf_unlikely(vdev->rx_decap_type == htt_cmn_pkt_type_raw)) {
 		qdf_nbuf_set_next(nbuf, NULL);
 		dp_rx_deliver_raw(vdev, nbuf, txrx_peer, link_id);