libnetlink.h revision 753fca4f54bdc4178fac97954746ded6553920a7 
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
8struct rtnl_handle
9{
10	int			fd;
11	struct sockaddr_nl	local;
12	struct sockaddr_nl	peer;
13	__u32			seq;
14	__u32			dump;
15};
16
17extern int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions);
18extern int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions, int protocol);
19extern void rtnl_close(struct rtnl_handle *rth);
20extern int rtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type);
21extern int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len);
22
23typedef int (*rtnl_filter_t)(const struct sockaddr_nl *,
24			     struct nlmsghdr *n, void *);
25extern int rtnl_dump_filter(struct rtnl_handle *rth, rtnl_filter_t filter,
26			    void *arg1,
27			    rtnl_filter_t junk,
28			    void *arg2);
29extern int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
30		     unsigned groups, struct nlmsghdr *answer,
31		     rtnl_filter_t junk,
32		     void *jarg);
33extern int rtnl_send(struct rtnl_handle *rth, const char *buf, int);
34
35
36extern int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data);
37extern int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data, int alen);
38extern int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len);
39extern int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data);
40extern int rta_addattr_l(struct rtattr *rta, int maxlen, int type, const void *data, int alen);
41
42extern int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len);
43extern int parse_rtattr_byindex(struct rtattr *tb[], int max, struct rtattr *rta, int len);
44
45#define parse_rtattr_nested(tb, max, rta) \
46	(parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
47
48extern int rtnl_listen(struct rtnl_handle *, rtnl_filter_t handler,
49		       void *jarg);
50extern int rtnl_from_file(FILE *, rtnl_filter_t handler,
51		       void *jarg);
52
53#define NLMSG_TAIL(nmsg) \
54	((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
55
56#endif /* __LIBNETLINK_H__ */
57
58