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(nla: 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