libnetlink.h revision b49240ec7eab91418d2f090536bf8cd2205988d6 
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 rcvbuf;
21
22extern int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions);
23extern int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions, int protocol);
24extern void rtnl_close(struct rtnl_handle *rth);
25extern int rtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type);
26extern int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len);
27
28typedef int (*rtnl_filter_t)(const struct sockaddr_nl *,
29			     struct nlmsghdr *n, void *);
30
31struct rtnl_dump_filter_arg
32{
33	rtnl_filter_t filter;
34	void *arg1;
35	rtnl_filter_t junk;
36	void *arg2;
37};
38
39extern int rtnl_dump_filter_l(struct rtnl_handle *rth,
40			      const struct rtnl_dump_filter_arg *arg);
41extern int rtnl_dump_filter(struct rtnl_handle *rth, rtnl_filter_t filter,
42			    void *arg1,
43			    rtnl_filter_t junk,
44			    void *arg2);
45
46extern int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
47		     unsigned groups, struct nlmsghdr *answer,
48		     rtnl_filter_t junk,
49		     void *jarg);
50extern int rtnl_send(struct rtnl_handle *rth, const char *buf, int);
51extern int rtnl_send_check(struct rtnl_handle *rth, const char *buf, int);
52
53extern int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data);
54extern int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data, int alen);
55extern int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len);
56extern struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type);
57extern int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest);
58extern struct rtattr *addattr_nest_compat(struct nlmsghdr *n, int maxlen, int type, const void *data, int len);
59extern int addattr_nest_compat_end(struct nlmsghdr *n, struct rtattr *nest);
60extern int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data);
61extern int rta_addattr_l(struct rtattr *rta, int maxlen, int type, const void *data, int alen);
62
63extern int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len);
64extern int parse_rtattr_byindex(struct rtattr *tb[], int max, struct rtattr *rta, int len);
65extern int __parse_rtattr_nested_compat(struct rtattr *tb[], int max, struct rtattr *rta, int len);
66
67#define parse_rtattr_nested(tb, max, rta) \
68	(parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
69
70#define parse_rtattr_nested_compat(tb, max, rta, data, len) \
71({	data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
72	__parse_rtattr_nested_compat(tb, max, rta, len); })
73
74extern int rtnl_listen(struct rtnl_handle *, rtnl_filter_t handler,
75		       void *jarg);
76extern int rtnl_from_file(FILE *, rtnl_filter_t handler,
77		       void *jarg);
78
79#define NLMSG_TAIL(nmsg) \
80	((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
81
82#ifndef IFA_RTA
83#define IFA_RTA(r) \
84	((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
85#endif
86#ifndef IFA_PAYLOAD
87#define IFA_PAYLOAD(n)	NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
88#endif
89
90#ifndef IFLA_RTA
91#define IFLA_RTA(r) \
92	((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
93#endif
94#ifndef IFLA_PAYLOAD
95#define IFLA_PAYLOAD(n)	NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
96#endif
97
98#ifndef NDA_RTA
99#define NDA_RTA(r) \
100	((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
101#endif
102#ifndef NDA_PAYLOAD
103#define NDA_PAYLOAD(n)	NLMSG_PAYLOAD(n,sizeof(struct ndmsg))
104#endif
105
106#ifndef NDTA_RTA
107#define NDTA_RTA(r) \
108	((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg))))
109#endif
110#ifndef NDTA_PAYLOAD
111#define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndtmsg))
112#endif
113
114#endif /* __LIBNETLINK_H__ */
115
116