net: loopback: Skip neighbor checks for local packets
No need to do any IPv6 neighbor checks if the packet is routed back
to us by loopback driver.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
diff --git a/subsys/net/ip/net_if.c b/subsys/net/ip/net_if.c
index b4cf61a..eb2b699 100644
--- a/subsys/net/ip/net_if.c
+++ b/subsys/net/ip/net_if.c
@@ -278,6 +278,15 @@
net_pkt_ll_src(pkt)->len = net_pkt_ll_if(pkt)->len;
}
+#if defined(CONFIG_NET_LOOPBACK)
+ /* If the packet is destined back to us, then there is no need to do
+ * additional checks, so let the packet through.
+ */
+ if (iface->l2 == &NET_L2_GET_NAME(DUMMY)) {
+ goto send;
+ }
+#endif
+
#if defined(CONFIG_NET_IPV6)
/* If the ll dst address is not set check if it is present in the nbr
* cache.
@@ -291,6 +300,9 @@
}
#endif
+#if defined(CONFIG_NET_LOOPBACK)
+send:
+#endif
verdict = iface->l2->send(iface, pkt);
done:
