samples: net: pkt_filter: Disabling packet priorities by default

The packet priority support is disabled by default so that the
application can work "normally" as a sample for trying network
packet filtering.

Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>

Author: jukkar

samples/net/pkt_filter/Kconfig

@@ -3,5 +3,13 @@
 # Copyright (c) 2025 Nordic Semiconductor ASA
 # SPDX-License-Identifier: Apache-2.0
 
+mainmenu "Networking pkt_filter sample application"
+
+config NET_SAMPLE_USE_PACKET_PRIORITIES
+	bool "Use network packet priorities"
+	help
+	  Create multiple traffic class queues in order to test
+	  network packet priorities.
+
 source "samples/net/common/Kconfig"
 source "Kconfig.zephyr"

samples/net/pkt_filter/overlay-priority.conf

@@ -0,0 +1,4 @@
+# Enable network packet priority support in the sample
+CONFIG_NET_SAMPLE_USE_PACKET_PRIORITIES=y
+CONFIG_NET_TC_RX_COUNT=2
+CONFIG_NET_TC_RX_SKIP_FOR_HIGH_PRIO=y

samples/net/pkt_filter/prj.conf

@@ -62,5 +62,4 @@ CONFIG_NET_IF_MAX_IPV6_COUNT=3
 
 # Network traffic class queues
 CONFIG_NET_TC_THREAD_PREEMPTIVE=y
-CONFIG_NET_TC_RX_COUNT=2
-CONFIG_NET_TC_RX_SKIP_FOR_HIGH_PRIO=y
+CONFIG_NET_TC_RX_COUNT=1

samples/net/pkt_filter/sample.yaml

@@ -1,14 +1,17 @@
 sample:
   description: Network packet filtering functionality
   name: Network packet filter sample app
+common:
+  harness: net
+  min_ram: 64
+  tags:
+    - net
+    - statistics
+    - net_pkt_filter
+  depends_on: netif
+  integration_platforms:
+    - native_sim
 tests:
-  sample.net.pkt_filter:
-    harness: net
-    min_ram: 64
-    tags:
-      - net
-      - statistics
-      - net_pkt_filter
-    depends_on: netif
-    integration_platforms:
-      - native_sim
+  sample.net.pkt_filter: {}
+  sample.net.pkt_filter_priorities:
+    extra_args: EXTRA_CONF_FILE="overlay-priority.conf"

samples/net/pkt_filter/src/main.c

@@ -148,11 +148,17 @@ static void init_app(void)
 	 * First append the priority rules, so that they get evaluated before
 	 * deciding on the final verdict for the packet.
 	 */
-	npf_append_recv_rule(&eth_priority_default);
-	npf_append_recv_rule(&eth_priority_ptp);
-	npf_append_recv_rule(&eth_priority_vlan);
-	npf_append_recv_rule(&arp_priority_vlan1);
-	npf_append_recv_rule(&arp_priority_vlan2);
+	if (IS_ENABLED(CONFIG_NET_SAMPLE_USE_PACKET_PRIORITIES)) {
+		LOG_INF("Using packet priorities");
+
+		npf_append_recv_rule(&eth_priority_default);
+		npf_append_recv_rule(&eth_priority_ptp);
+		npf_append_recv_rule(&eth_priority_vlan);
+		npf_append_recv_rule(&arp_priority_vlan1);
+		npf_append_recv_rule(&arp_priority_vlan2);
+	} else {
+		LOG_INF("Packet priorities are disabled");
+	}
 
 	/* We allow small IPv4 packets to the VLAN interface 1 */
 	npf_append_recv_rule(&small_ipv4_pkt);