net: if: Fix source interface select for IPv4 address

Do the selection same way as in IPv6 so that if user supplies
unspecified destination address, the default interface is selected
the same way.

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

Author: jukkar

subsys/net/ip/net_if.c

@@ -3538,22 +3538,17 @@ bool net_if_ipv4_is_addr_bcast(struct net_if *iface,
 struct net_if *net_if_ipv4_select_src_iface(const struct in_addr *dst)
 {
 	struct net_if *selected = NULL;
+	const struct in_addr *src;
 
-	STRUCT_SECTION_FOREACH(net_if, iface) {
-		bool ret;
-
-		ret = net_if_ipv4_addr_mask_cmp(iface, dst);
-		if (ret) {
-			selected = iface;
-			goto out;
-		}
+	src = net_if_ipv4_select_src_addr(NULL, dst);
+	if (src != net_ipv4_unspecified_address()) {
+		net_if_ipv4_addr_lookup(src, &selected);
 	}
 
 	if (selected == NULL) {
 		selected = net_if_get_default();
 	}
 
-out:
 	return selected;
 }