#include <linux/netlink.h> #include <linux/rtnetlink.h> #include <linux/types.h> #include <net/net_namespace.h> #include <net/netlink.h> #include <net/ip.h> int rtm_getroute_parse_ip_proto(struct nlattr *attr, u8 *ip_proto, struct netlink_ext_ack *extack) { *ip_proto = nla_get_u8(attr); switch (*ip_proto) { case IPPROTO_TCP: case IPPROTO_UDP: case IPPROTO_ICMP: return 0; default: NL_SET_ERR_MSG(extack, "Unsupported ip proto"); return -EOPNOTSUPP; } } EXPORT_SYMBOL_GPL(rtm_getroute_parse_ip_proto);