libnetlink.h revision ead2ba7008c9db02954dae6f180aed8770a0560d 
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);
37
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 int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data);
43extern int rta_addattr_l(struct rtattr *rta, int maxlen, int type, const void *data, int alen);
44
45extern int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len);
46extern int parse_rtattr_byindex(struct rtattr *tb[], int max, struct rtattr *rta, int len);
47
48#define parse_rtattr_nested(tb, max, rta) \
49	(parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
50
51extern int rtnl_listen(struct rtnl_handle *, rtnl_filter_t handler,
52		       void *jarg);
53extern int rtnl_from_file(FILE *, rtnl_filter_t handler,
54		       void *jarg);
55
56#define NLMSG_TAIL(nmsg) \
57	((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
58
59#ifndef IFA_RTA
60#define IFA_RTA(r) \
61	((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
62#endif
63#ifndef IFA_PAYLOAD
64#define IFA_PAYLOAD(n)	NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
65#endif
66
67#ifndef IFLA_RTA
68#define IFLA_RTA(r) \
69	((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
70#endif
71#ifndef IFLA_PAYLOAD
72#define IFLA_PAYLOAD(n)	NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
73#endif
74
75#ifndef NDA_RTA
76#define NDA_RTA(r) \
77	((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
78#endif
79#ifndef NDA_PAYLOAD
80#define NDA_PAYLOAD(n)	NLMSG_PAYLOAD(n,sizeof(struct ndmsg))
81#endif
82
83#ifndef NDTA_RTA
84#define NDTA_RTA(r) \
85	((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg))))
86#endif
87#ifndef NDTA_PAYLOAD
88#define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndtmsg))
89#endif
90
91#endif /* __LIBNETLINK_H__ */
92
93