// SPDX-License-Identifier: GPL-2.0-only#include <linux/netlink.h>#include <linux/rtnetlink.h>#include <linux/types.h>#include <net/net_namespace.h>#include <net/netlink.h>#include <linux/in6.h>#include <net/ip.h> int rtm_getroute_parse_ip_proto(struct nlattr *attr, u8 *ip_proto, u8 family,				struct netlink_ext_ack *extack){	*ip_proto = nla_get_u8(attr); 	switch (*ip_proto) {	case IPPROTO_TCP:	case IPPROTO_UDP:		return 0;	case IPPROTO_ICMP:		if (family != AF_INET)			break;		return 0;#if IS_ENABLED(CONFIG_IPV6)	case IPPROTO_ICMPV6:		if (family != AF_INET6)			break;		return 0;#endif	}	NL_SET_ERR_MSG(extack, "Unsupported ip proto");	return -EOPNOTSUPP;}EXPORT_SYMBOL_GPL(rtm_getroute_parse_ip_proto);