1 #include <linux/netlink.h>
2 #include <linux/rtnetlink.h>
3 #include <linux/types.h>
4 #include <net/net_namespace.h>
5 #include <net/netlink.h>
6 #include <net/ip.h>
7 
rtm_getroute_parse_ip_proto(struct nlattr * attr,u8 * ip_proto,struct netlink_ext_ack * extack)8 int rtm_getroute_parse_ip_proto(struct nlattr *attr, u8 *ip_proto,
9 				struct netlink_ext_ack *extack)
10 {
11 	*ip_proto = nla_get_u8(attr);
12 
13 	switch (*ip_proto) {
14 	case IPPROTO_TCP:
15 	case IPPROTO_UDP:
16 	case IPPROTO_ICMP:
17 		return 0;
18 	default:
19 		NL_SET_ERR_MSG(extack, "Unsupported ip proto");
20 		return -EOPNOTSUPP;
21 	}
22 }
23 EXPORT_SYMBOL_GPL(rtm_getroute_parse_ip_proto);
24