nrf_wifi: Bring in Promiscuous mode filtering support in driver

This set of changes brings in promiscuous mode filtering support in
the driver. Since, firmware would be unable to filter packets in
the case of promiscuous mode as it would lead to connection issues,
filtering support is moved to the driver for promiscuous mode.

Signed-off-by: Vivekananda Uppunda <vivekananda.uppunda@nordicsemi.no>

drivers/nrf_wifi/fw_if/umac_if/inc/default/fmac_structs.h

@@ -270,10 +270,10 @@ struct nrf_wifi_fmac_callbk_fns {
 				     signed short signal);
 #endif /* NRF70_STA_MODE */
 #if defined(NRF70_RAW_DATA_RX) || defined(NRF70_PROMISC_DATA_RX)
-	void (*rx_sniffer_frm_callbk_fn)(void *os_vif_ctx,
-					 void *frm,
-					 struct raw_rx_pkt_header *,
-					 bool pkt_free);
+	void (*sniffer_callbk_fn)(void *os_vif_ctx,
+				  void *frm,
+				  struct raw_rx_pkt_header *,
+				  bool pkt_free);
 #endif /* NRF70_RAW_DATA_RX || NRF70_PROMISC_DATA_RX */
 	void (*reg_change_callbk_fn)(void *os_vif_ctx,
 				     struct nrf_wifi_event_regulatory_change *reg_change,

drivers/nrf_wifi/fw_if/umac_if/src/rx.c

@@ -12,7 +12,7 @@
 #include "hal_api.h"
 #include "fmac_rx.h"
 #include "fmac_util.h"
-
+#include "fmac_promisc.h"
 
 static enum nrf_wifi_status
 nrf_wifi_fmac_map_desc_to_pool(struct nrf_wifi_fmac_dev_ctx *fmac_dev_ctx,
@@ -211,6 +211,9 @@ enum nrf_wifi_status nrf_wifi_fmac_rx_event_process(struct nrf_wifi_fmac_dev_ctx
 	struct nrf_wifi_fmac_rx_pool_map_info pool_info;
 #if defined(NRF70_RAW_DATA_RX) || defined(NRF70_PROMISC_DATA_RX)
 	struct raw_rx_pkt_header raw_rx_hdr;
+#if defined(NRF70_PROMISC_DATA_RX)
+	unsigned short frame_control;
+#endif
 #endif /* NRF70_RAW_DATA_RX || NRF70_PROMISC_DATA_RX */
 	void *nwb = NULL;
 	void *nwb_data = NULL;
@@ -282,18 +285,25 @@ enum nrf_wifi_status nrf_wifi_fmac_rx_event_process(struct nrf_wifi_fmac_dev_ctx
 		rx_buf_info->nwb = 0;
 		rx_buf_info->mapped = false;
 
+#ifdef NRF70_PROMISC_DATA_RX
+		nrf_wifi_osal_mem_cpy(&frame_control,
+				      nwb_data,
+				      sizeof(unsigned short));
+#endif
+
 		if (config->rx_pkt_type == NRF_WIFI_RX_PKT_DATA) {
 #ifdef NRF70_PROMISC_DATA_RX
 			if (vif_ctx->promisc_mode) {
 				raw_rx_hdr.frequency = config->frequency;
 				raw_rx_hdr.signal = config->signal;
 				raw_rx_hdr.rate_flags = config->rate_flags;
 				raw_rx_hdr.rate = config->rate;
-
-				def_priv->callbk_fns.rx_sniffer_frm_callbk_fn(vif_ctx->os_vif_ctx,
-									      nwb,
-									      &raw_rx_hdr,
-									      false);
+				if (nrf_wifi_util_check_filt_setting(vif_ctx, &frame_control)) {
+					def_priv->callbk_fns.sniffer_callbk_fn(vif_ctx->os_vif_ctx,
+									       nwb,
+									       &raw_rx_hdr,
+									       false);
+				}
 			}
 #endif
 #ifdef NRF70_STA_MODE
@@ -356,11 +366,26 @@ enum nrf_wifi_status nrf_wifi_fmac_rx_event_process(struct nrf_wifi_fmac_dev_ctx
 			raw_rx_hdr.signal = config->signal;
 			raw_rx_hdr.rate_flags = config->rate_flags;
 			raw_rx_hdr.rate = config->rate;
-
-			def_priv->callbk_fns.rx_sniffer_frm_callbk_fn(vif_ctx->os_vif_ctx,
-								      nwb,
-								      &raw_rx_hdr,
-								      true);
+#if defined(NRF70_PROMISC_DATA_RX)
+			if (nrf_wifi_util_check_filt_setting(vif_ctx, &frame_control))
+#endif
+			{
+				def_priv->callbk_fns.sniffer_callbk_fn(vif_ctx->os_vif_ctx,
+								       nwb,
+								       &raw_rx_hdr,
+								       true);
+			}
+#if defined(NRF70_PROMISC_DATA_RX)
+			/**
+			 * In the case of Monitor mode, the sniffer callback function
+			 * will free the packet. For promiscuous mode, if the packet
+			 * is not meant to be sent up the stack, the packet needs
+			 * to be freed here.
+			 */
+			else {
+				nrf_wifi_osal_nbuf_free(nwb);
+			}
+#endif
 		}
 #endif /* NRF70_RAW_DATA_RX || NRF70_PROMISC_DATA_RX */
 		else {