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 <linux/in6.h>
   7 #include <net/ip.h>
   8
   9 int rtm_getroute_parse_ip_proto(struct nlattr *attr, u8 *ip_proto, u8 family,
  10                                 struct netlink_ext_ack *extack)
  11 {
  12         *ip_proto = nla_get_u8(attr);
  13
  14         switch (*ip_proto) {
  15         case IPPROTO_TCP:
  16         case IPPROTO_UDP:
  17                 return 0;
  18         case IPPROTO_ICMP:
  19                 if (family != AF_INET)
  20                         break;
  21                 return 0;
  22 #if IS_ENABLED(CONFIG_IPV6)
  23         case IPPROTO_ICMPV6:
  24                 if (family != AF_INET6)
  25                         break;
  26                 return 0;
  27 #endif
  28         }
  29         NL_SET_ERR_MSG(extack, "Unsupported ip proto");
  30         return -EOPNOTSUPP;
  31 }
  32 EXPORT_SYMBOL_GPL(rtm_getroute_parse_ip_proto);