ethernet: packet triage

Author: Cla Mattia Galliard

drivers/ethernet/eth_stm32_hal.c

@@ -659,6 +659,11 @@ static void rx_thread(void *arg1, void *unused1, void *unused2)
 		if (res == 0) {
 			/* semaphore taken and receive packets */
 			while ((pkt = eth_rx(dev)) != NULL) {
+				if (ntohs(NET_ETH_HDR(pkt)->type) == NET_ETH_PTYPE_PNIO) {
+					/* NET_PRIORITY_NC = 7 is Network control (highest priority) */
+					net_pkt_set_priority(pkt, NET_PRIORITY_NC);
+				}
+
 				iface = net_pkt_iface(pkt);
 #if defined(CONFIG_NET_DSA_DEPRECATED)
 				iface = dsa_net_recv(iface, &pkt);

include/zephyr/net/ethernet.h

@@ -72,6 +72,7 @@ struct net_eth_addr {
 #define NET_ETH_PTYPE_IP		0x0800
 #define NET_ETH_PTYPE_IPV6		0x86dd
 #define NET_ETH_PTYPE_LLDP		0x88cc
+#define NET_ETH_PTYPE_PNIO		0x8892
 #define NET_ETH_PTYPE_PTP		0x88f7
 #define NET_ETH_PTYPE_TSN		0x22f0 /* TSN (IEEE 1722) packet */
 #define NET_ETH_PTYPE_VLAN		0x8100