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1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * libnetlink.c RTnetlink service routines.
5 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
11 #ifndef __LIBNETLINK_H__
12 #define __LIBNETLINK_H__ 1
14 #include <asm/types.h>
15 #include <linux/netlink.h>
16 #include <linux/rtnetlink.h>
17 #include <linux/if_link.h>
18 #include <linux/if_addr.h>
19 #include <linux/neighbour.h>
23 struct sockaddr_nl local
;
24 struct sockaddr_nl peer
;
31 extern int rtnl_open(struct rtnl_handle
*rth
, unsigned subscriptions
);
32 extern int rtnl_open_byproto(struct rtnl_handle
*rth
, unsigned subscriptions
,
34 extern void rtnl_close(struct rtnl_handle
*rth
);
35 extern int rtnl_wilddump_request(struct rtnl_handle
*rth
, int fam
, int type
);
36 extern int rtnl_dump_request(struct rtnl_handle
*rth
, int type
, void *req
,
39 typedef int (*rtnl_filter_t
)(const struct sockaddr_nl
*, struct nlmsghdr
*n
,
42 struct rtnl_dump_filter_arg
{
49 extern int rtnl_dump_filter_l(struct rtnl_handle
*rth
,
50 const struct rtnl_dump_filter_arg
*arg
);
51 extern int rtnl_dump_filter(struct rtnl_handle
*rth
, rtnl_filter_t filter
,
52 void *arg1
, rtnl_filter_t junk
, void *arg2
);
54 extern int rtnl_talk(struct rtnl_handle
*rtnl
, struct nlmsghdr
*n
, pid_t peer
,
55 unsigned groups
, struct nlmsghdr
*answer
,
56 rtnl_filter_t junk
, void *jarg
);
57 extern int rtnl_send(struct rtnl_handle
*rth
, const char *buf
, int);
58 extern int rtnl_send_check(struct rtnl_handle
*rth
, const char *buf
, int);
60 extern int addattr32(struct nlmsghdr
*n
, int maxlen
, int type
, __u32 data
);
61 extern int addattr_l(struct nlmsghdr
*n
, int maxlen
, int type
, const void *data
,
63 extern int addraw_l(struct nlmsghdr
*n
, int maxlen
, const void *data
, int len
);
64 extern struct rtattr
*addattr_nest(struct nlmsghdr
*n
, int maxlen
, int type
);
65 extern int addattr_nest_end(struct nlmsghdr
*n
, struct rtattr
*nest
);
66 extern struct rtattr
*addattr_nest_compat(struct nlmsghdr
*n
, int maxlen
,
67 int type
, const void *data
, int len
);
68 extern int addattr_nest_compat_end(struct nlmsghdr
*n
, struct rtattr
*nest
);
69 extern int rta_addattr32(struct rtattr
*rta
, int maxlen
, int type
, __u32 data
);
70 extern int rta_addattr_l(struct rtattr
*rta
, int maxlen
, int type
,
71 const void *data
, int alen
);
73 extern int parse_rtattr(struct rtattr
*tb
[], int max
, struct rtattr
*rta
,
75 extern int parse_rtattr_byindex(struct rtattr
*tb
[], int max
,
76 struct rtattr
*rta
, int len
);
77 extern int __parse_rtattr_nested_compat(struct rtattr
*tb
[], int max
,
78 struct rtattr
*rta
, int len
);
80 #define parse_rtattr_nested(tb, max, rta) \
81 (parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
83 #define parse_rtattr_nested_compat(tb, max, rta, data, len) \
85 data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
86 __parse_rtattr_nested_compat(tb, max, rta, len); \
89 extern int rtnl_listen(struct rtnl_handle
*, rtnl_filter_t handler
, void *jarg
);
90 extern int rtnl_from_file(FILE *, rtnl_filter_t handler
, void *jarg
);
92 #define NLMSG_TAIL(nmsg) \
93 ((struct rtattr *)(((uint8_t *)(nmsg)) \
94 + NLMSG_ALIGN((nmsg)->nlmsg_len)))
98 ((struct rtattr *)(((char *)(r)) \
99 + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
102 #define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
106 #define IFLA_RTA(r) \
107 ((struct rtattr *)(((char *)(r)) \
108 + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
111 #define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
116 ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
119 #define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndmsg))
123 #define NDTA_RTA(r) \
124 ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg))))
127 #define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndtmsg))
130 #endif /* __LIBNETLINK_H__ */
132 #endif /* __linux__ */