LXR linux/net/ipv4/netlink.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2#include <linux/netlink.h>
   3#include <linux/rtnetlink.h>
   4#include <linux/types.h>
   5#include <net/net_namespace.h>
   6#include <net/netlink.h>
   7#include <linux/in6.h>
   8#include <net/ip.h>
   9
  10int rtm_getroute_parse_ip_proto(struct nlattr *attr, u8 *ip_proto, u8 family,
  11                                struct netlink_ext_ack *extack)
  12{
  13        *ip_proto = nla_get_u8(attr);
  14
  15        switch (*ip_proto) {
  16        case IPPROTO_TCP:
  17        case IPPROTO_UDP:
  18                return 0;
  19        case IPPROTO_ICMP:
  20                if (family != AF_INET)
  21                        break;
  22                return 0;
  23#if IS_ENABLED(CONFIG_IPV6)
  24        case IPPROTO_ICMPV6:
  25                if (family != AF_INET6)
  26                        break;
  27                return 0;
  28#endif
  29        }
  30        NL_SET_ERR_MSG(extack, "Unsupported ip proto");
  31        return -EOPNOTSUPP;
  32}
  33EXPORT_SYMBOL_GPL(rtm_getroute_parse_ip_proto);
  34