libnetlink.h revision 2aa3dd29a75c494bf969586da5489d4dc7d07839 
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 void *buf, int);
51extern int rtnl_send_check(struct rtnl_handle *rth, const void *buf, int);
52
53extern int addattr(struct nlmsghdr *n, int maxlen, int type);
54extern int addattr8(struct nlmsghdr *n, int maxlen, int type, __u8 data);
55extern int addattr16(struct nlmsghdr *n, int maxlen, int type, __u16 data);
56extern int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data);
57extern int addattr64(struct nlmsghdr *n, int maxlen, int type, __u64 data);
58extern int addattrstrz(struct nlmsghdr *n, int maxlen, int type, const char *data);
59
60extern int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data, int alen);
61extern int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len);
62extern struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type);
63extern int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest);
64extern struct rtattr *addattr_nest_compat(struct nlmsghdr *n, int maxlen, int type, const void *data, int len);
65extern int addattr_nest_compat_end(struct nlmsghdr *n, struct rtattr *nest);
66extern int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data);
67extern int rta_addattr_l(struct rtattr *rta, int maxlen, int type, const void *data, int alen);
68
69extern int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len);
70extern int parse_rtattr_byindex(struct rtattr *tb[], int max, struct rtattr *rta, int len);
71extern int __parse_rtattr_nested_compat(struct rtattr *tb[], int max, struct rtattr *rta, int len);
72
73#define parse_rtattr_nested(tb, max, rta) \
74	(parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
75
76#define parse_rtattr_nested_compat(tb, max, rta, data, len) \
77({	data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
78	__parse_rtattr_nested_compat(tb, max, rta, len); })
79
80extern int rtnl_listen(struct rtnl_handle *, rtnl_filter_t handler,
81		       void *jarg);
82extern int rtnl_from_file(FILE *, rtnl_filter_t handler,
83		       void *jarg);
84
85#define NLMSG_TAIL(nmsg) \
86	((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
87
88#ifndef IFA_RTA
89#define IFA_RTA(r) \
90	((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
91#endif
92#ifndef IFA_PAYLOAD
93#define IFA_PAYLOAD(n)	NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
94#endif
95
96#ifndef IFLA_RTA
97#define IFLA_RTA(r) \
98	((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
99#endif
100#ifndef IFLA_PAYLOAD
101#define IFLA_PAYLOAD(n)	NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
102#endif
103
104#ifndef NDA_RTA
105#define NDA_RTA(r) \
106	((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
107#endif
108#ifndef NDA_PAYLOAD
109#define NDA_PAYLOAD(n)	NLMSG_PAYLOAD(n,sizeof(struct ndmsg))
110#endif
111
112#ifndef NDTA_RTA
113#define NDTA_RTA(r) \
114	((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg))))
115#endif
116#ifndef NDTA_PAYLOAD
117#define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndtmsg))
118#endif
119
120#endif /* __LIBNETLINK_H__ */
121
122