1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _UAPI_LINUX_NEXTHOP_H
3 #define _UAPI_LINUX_NEXTHOP_H
4
5 #include <linux/types.h>
6
7 struct nhmsg {
8 unsigned char nh_family;
9 unsigned char nh_scope; /* return only */
10 unsigned char nh_protocol; /* Routing protocol that installed nh */
11 unsigned char resvd;
12 unsigned int nh_flags; /* RTNH_F flags */
13 };
14
15 /* entry in a nexthop group */
16 struct nexthop_grp {
17 __u32 id; /* nexthop id - must exist */
18 __u8 weight; /* weight of this nexthop */
19 __u8 resvd1;
20 __u16 resvd2;
21 };
22
23 enum {
24 NEXTHOP_GRP_TYPE_MPATH, /* default type if not specified */
25 __NEXTHOP_GRP_TYPE_MAX,
26 };
27
28 #define NEXTHOP_GRP_TYPE_MAX (__NEXTHOP_GRP_TYPE_MAX - 1)
29
30 enum {
31 NHA_UNSPEC,
32 NHA_ID, /* u32; id for nexthop. id == 0 means auto-assign */
33
34 NHA_GROUP, /* array of nexthop_grp */
35 NHA_GROUP_TYPE, /* u16 one of NEXTHOP_GRP_TYPE */
36 /* if NHA_GROUP attribute is added, no other attributes can be set */
37
38 NHA_BLACKHOLE, /* flag; nexthop used to blackhole packets */
39 /* if NHA_BLACKHOLE is added, OIF, GATEWAY, ENCAP can not be set */
40
41 NHA_OIF, /* u32; nexthop device */
42 NHA_GATEWAY, /* be32 (IPv4) or in6_addr (IPv6) gw address */
43 NHA_ENCAP_TYPE, /* u16; lwt encap type */
44 NHA_ENCAP, /* lwt encap data */
45
46 /* NHA_OIF can be appended to dump request to return only
47 * nexthops using given device
48 */
49 NHA_GROUPS, /* flag; only return nexthop groups in dump */
50 NHA_MASTER, /* u32; only return nexthops with given master dev */
51
52 __NHA_MAX,
53 };
54
55 #define NHA_MAX (__NHA_MAX - 1)
56 #endif