net/ipv4/netlink.c

   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
   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);