net: ipv4: Do not change the protocol type when sending

jukkar · jukkar · commit 86048ad73d17 · 2025-01-20T17:32:12.000+02:00
The ARP code has set the protocol type of the packet to
0x806, so do not change it when preparing to send to 0x800
which is the IP protocol type. Lets trust the previously
called functions to set the ptype correctly and do not set
it here.

Signed-off-by: Jukka Rissanen &lt;jukka.rissanen@nordicsemi.no&gt;
diff --git a/subsys/net/ip/ipv4.c b/subsys/net/ip/ipv4.c
@@ -454,8 +454,6 @@ enum net_verdict net_ipv4_input(struct net_pkt *pkt, bool is_loopback)
 
 enum net_verdict net_ipv4_prepare_for_send(struct net_pkt *pkt)
 {
-	net_pkt_set_ll_proto_type(pkt, NET_ETH_PTYPE_IP);
-
 	if (IS_ENABLED(CONFIG_NET_IPV4_PMTU)) {
 		struct net_pmtu_entry *entry;
 		struct sockaddr_in dst = {

Original file line number	Diff line number	Diff line change
`@@ -454,8 +454,6 @@ enum net_verdict net_ipv4_input(struct net_pkt *pkt, bool is_loopback)`
`454`	`454`
`455`	`455`	`enum net_verdict net_ipv4_prepare_for_send(struct net_pkt *pkt)`
`456`	`456`	`{`
`457`		`- net_pkt_set_ll_proto_type(pkt, NET_ETH_PTYPE_IP);`
`458`		`-`
`459`	`457`	`if (IS_ENABLED(CONFIG_NET_IPV4_PMTU)) {`
`460`	`458`	`struct net_pmtu_entry *entry;`
`461`	`459`	`struct sockaddr_in dst = {`