libnetlink.h revision f31a37f79d1f33d4d0d6a18f3768bfee27e8b6cc 
1#ifndef __LIBNETLINK_H__
2#define __LIBNETLINK_H__ 1
3
4#include <asm/types.h>
5#include <linux/netlink.h>
6#include <linux/rtnetlink.h>
7#include <linux/if_link.h>
8#include <linux/if_addr.h>
9#include <linux/neighbour.h>
10
11struct rtnl_handle
12{
13	int			fd;
14	struct sockaddr_nl	local;
15	struct sockaddr_nl	peer;
16	__u32			seq;
17	__u32			dump;
18};
19
20extern int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions);
21extern int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions, int protocol);
22extern void rtnl_close(struct rtnl_handle *rth);
23extern int rtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type);
24extern int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len);
25
26typedef int (*rtnl_filter_t)(const struct sockaddr_nl *,
27			     struct nlmsghdr *n, void *);
28extern int rtnl_dump_filter(struct rtnl_handle *rth, rtnl_filter_t filter,
29			    void *arg1,
30			    rtnl_filter_t junk,
31			    void *arg2);
32extern int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
33		     unsigned groups, struct nlmsghdr *answer,
34		     rtnl_filter_t junk,
35		     void *jarg);
36extern int rtnl_send(struct rtnl_handle *rth, const char *buf, int);
37extern int rtnl_send_check(struct rtnl_handle *rth, const char *buf, int);
38
39extern int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data);
40extern int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data, int alen);
41extern int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len);
42extern struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type);
43extern int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest);
44extern struct rtattr *addattr_nest_compat(struct nlmsghdr *n, int maxlen, int type, const void *data, int len);
45extern int addattr_nest_compat_end(struct nlmsghdr *n, struct rtattr *nest);
46extern int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data);
47extern int rta_addattr_l(struct rtattr *rta, int maxlen, int type, const void *data, int alen);
48
49extern int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len);
50extern int parse_rtattr_byindex(struct rtattr *tb[], int max, struct rtattr *rta, int len);
51extern int __parse_rtattr_nested_compat(struct rtattr *tb[], int max, struct rtattr *rta, int len);
52
53#define parse_rtattr_nested(tb, max, rta) \
54	(parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
55
56#define parse_rtattr_nested_compat(tb, max, rta, data, len) \
57({	data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
58	__parse_rtattr_nested_compat(tb, max, rta, len); })
59
60extern int rtnl_listen(struct rtnl_handle *, rtnl_filter_t handler,
61		       void *jarg);
62extern int rtnl_from_file(FILE *, rtnl_filter_t handler,
63		       void *jarg);
64
65#define NLMSG_TAIL(nmsg) \
66	((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
67
68#ifndef IFA_RTA
69#define IFA_RTA(r) \
70	((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
71#endif
72#ifndef IFA_PAYLOAD
73#define IFA_PAYLOAD(n)	NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
74#endif
75
76#ifndef IFLA_RTA
77#define IFLA_RTA(r) \
78	((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
79#endif
80#ifndef IFLA_PAYLOAD
81#define IFLA_PAYLOAD(n)	NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
82#endif
83
84#ifndef NDA_RTA
85#define NDA_RTA(r) \
86	((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
87#endif
88#ifndef NDA_PAYLOAD
89#define NDA_PAYLOAD(n)	NLMSG_PAYLOAD(n,sizeof(struct ndmsg))
90#endif
91
92#ifndef NDTA_RTA
93#define NDTA_RTA(r) \
94	((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg))))
95#endif
96#ifndef NDTA_PAYLOAD
97#define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndtmsg))
98#endif
99
100#endif /* __LIBNETLINK_H__ */
101
102