static int selinux_parse_skb(struct sk_buff *skb, struct common_audit_data *ad,
			     char **_addrp, int src, u8 *proto)
{
	char *addrp;
	int ret;

	switch (ad->u.net->family) {
	case PF_INET:
		ret = selinux_parse_skb_ipv4(skb, ad, proto);
		if (ret)
			goto parse_error;
		addrp = (char *)(src ? &ad->u.net->v4info.saddr :
				       &ad->u.net->v4info.daddr);
		goto okay;

#if IS_ENABLED(CONFIG_IPV6)
	case PF_INET6:
		ret = selinux_parse_skb_ipv6(skb, ad, proto);
		if (ret)
			goto parse_error;
		addrp = (char *)(src ? &ad->u.net->v6info.saddr :
				       &ad->u.net->v6info.daddr);
		goto okay;
#endif	/* IPV6 */
	default:
		addrp = NULL;
		goto okay;
	}

parse_error:
	pr_warn(
	       "SELinux: failure in selinux_parse_skb(),"
	       " unable to parse packet\n");
	return ret;

okay:
	if (_addrp)
		*_addrp = addrp;
	return 0;
}