net: gptp: Set priority of the sent gPTP packets

Use priority 3 (critial app) for outgoing event messages (Sync,
Pdelay_Req and Pdelay_Resp). Use priority 6 (Internetwork Control)
for all other outgoing packets.
See IEEE 802.1Q chapter 8.4.4 for more details.

Signed-off-by: Jukka Rissanen <[email protected]>

Author: jukkar

subsys/net/ip/l2/gptp/gptp_messages.c

@@ -143,6 +143,7 @@ struct net_pkt *gptp_prepare_sync(int port)
 	net_pkt_frag_add(pkt, frag);
 	net_pkt_set_iface(pkt, iface);
 	net_pkt_set_family(pkt, AF_UNSPEC);
+	net_pkt_set_priority(pkt, NET_PRIORITY_CA);
 
 	net_pkt_set_ll_reserve(pkt, eth_len);
 
@@ -258,6 +259,7 @@ struct net_pkt *gptp_prepare_follow_up(int port, struct net_pkt *sync)
 	net_pkt_set_iface(pkt, iface);
 	net_pkt_set_family(pkt, AF_UNSPEC);
 	net_pkt_set_ll_reserve(pkt, eth_len);
+	net_pkt_set_priority(pkt, NET_PRIORITY_IC);
 
 #if defined(CONFIG_NET_VLAN)
 	if (vlan_enabled) {
@@ -370,6 +372,7 @@ struct net_pkt *gptp_prepare_pdelay_req(int port)
 	net_pkt_set_iface(pkt, iface);
 	net_pkt_set_family(pkt, AF_UNSPEC);
 	net_pkt_set_ll_reserve(pkt, eth_len);
+	net_pkt_set_priority(pkt, NET_PRIORITY_CA);
 
 #if defined(CONFIG_NET_VLAN)
 	if (vlan_enabled) {
@@ -483,6 +486,7 @@ struct net_pkt *gptp_prepare_pdelay_resp(int port,
 	net_pkt_set_iface(pkt, iface);
 	net_pkt_set_family(pkt, AF_INET);
 	net_pkt_set_ll_reserve(pkt, eth_len);
+	net_pkt_set_priority(pkt, NET_PRIORITY_CA);
 
 #if defined(CONFIG_NET_VLAN)
 	if (vlan_enabled) {
@@ -602,6 +606,7 @@ struct net_pkt *gptp_prepare_pdelay_follow_up(int port,
 	net_pkt_set_iface(pkt, iface);
 	net_pkt_set_family(pkt, AF_INET);
 	net_pkt_set_ll_reserve(pkt, eth_len);
+	net_pkt_set_priority(pkt, NET_PRIORITY_IC);
 
 #if defined(CONFIG_NET_VLAN)
 	if (vlan_enabled) {
@@ -728,6 +733,7 @@ struct net_pkt *gptp_prepare_announce(int port)
 	net_pkt_set_iface(pkt, iface);
 	net_pkt_set_family(pkt, AF_INET);
 	net_pkt_set_ll_reserve(pkt, eth_len);
+	net_pkt_set_priority(pkt, NET_PRIORITY_IC);
 
 #if defined(CONFIG_NET_VLAN)
 	if (vlan_enabled) {