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Linux/net/ipv4/netlink.c

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  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 
 10 int 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 }
 33 EXPORT_SYMBOL_GPL(rtm_getroute_parse_ip_proto);
 34 

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