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net: if: Check chksum offloading properly for VLAN interfaces 

Make sure we check the checksum offloading capabilities correctly
for VLAN interfaces. Use the real Ethernet interface when doing the
check.

Fixes #78724

Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>
This commit is contained in:
Jukka Rissanen 2024-09-20 09:29:48 +03:00 committed by Alberto Escolar
parent e75316b11a
commit 00bb90a42e
1 changed files with 13 additions and 1 deletions
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14
subsys/net/ip/net_if.c
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@ -5173,7 +5173,19 @@ static bool need_calc_checksum(struct net_if *iface, enum ethernet_hw_caps caps,
enum ethernet_config_type config_type;
if (net_if_l2(iface) != &NET_L2_GET_NAME(ETHERNET)) {
return true;
/* For VLANs, figure out the main Ethernet interface and
* get the offloading capabilities from it.
*/
if (IS_ENABLED(CONFIG_NET_VLAN) && net_eth_is_vlan_interface(iface)) {
iface = net_eth_get_vlan_main(iface);
if (iface == NULL) {
return true;
}
NET_ASSERT(net_if_l2(iface) == &NET_L2_GET_NAME(ETHERNET));
} else {
return true;
}
}
if (!(net_eth_get_hw_capabilities(iface) & caps)) {