1 /* vi: set sw=4 ts=4: */
2 #ifndef LIBNETLINK_H
3 #define LIBNETLINK_H 1
4
5 #include <linux/types.h>
6 /* We need linux/types.h because older kernels use __u32 etc
7 * in linux/[rt]netlink.h. 2.6.19 seems to be ok, though */
8 #include <linux/netlink.h>
9 #include <linux/rtnetlink.h>
10
11 PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
12
13 struct rtnl_handle {
14 int fd;
15 struct sockaddr_nl local;
16 struct sockaddr_nl peer;
17 uint32_t seq;
18 uint32_t dump;
19 };
20
21 extern void xrtnl_open(struct rtnl_handle *rth) FAST_FUNC;
22 #define rtnl_close(rth) (close((rth)->fd))
23 extern void xrtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type) FAST_FUNC;
24 extern int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len) FAST_FUNC;
25 extern int xrtnl_dump_filter(struct rtnl_handle *rth,
26 int (*filter)(const struct sockaddr_nl*, struct nlmsghdr *n, void*) FAST_FUNC,
27 void *arg1) FAST_FUNC;
28
29 /* bbox doesn't use parameters no. 3, 4, 6, 7, stub them out */
30 #define rtnl_talk(rtnl, n, peer, groups, answer, junk, jarg) \
31 rtnl_talk(rtnl, n, answer)
32 extern int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
33 unsigned groups, struct nlmsghdr *answer,
34 int (*junk)(struct sockaddr_nl *,struct nlmsghdr *n, void *),
35 void *jarg) FAST_FUNC;
36
37 int rtnl_send_check(struct rtnl_handle *rth, const void *buf, int len) FAST_FUNC;
38 //TODO: pass rth->fd instead of full rth?
rtnl_send(struct rtnl_handle * rth,const void * buf,int len)39 static ALWAYS_INLINE void rtnl_send(struct rtnl_handle *rth, const void *buf, int len)
40 {
41 // Used to be:
42 //struct sockaddr_nl nladdr;
43 //memset(&nladdr, 0, sizeof(nladdr));
44 //nladdr.nl_family = AF_NETLINK;
45 //return xsendto(rth->fd, buf, len, (struct sockaddr*)&nladdr, sizeof(nladdr));
46
47 // iproute2-4.2.0 simplified the above to:
48 //return send(rth->fd, buf, len, 0);
49
50 // We are using even shorter:
51 xwrite(rth->fd, buf, len);
52 // and convert to void, inline.
53 }
54
55 extern int addattr32(struct nlmsghdr *n, int maxlen, int type, uint32_t data) FAST_FUNC;
56 extern int addattr_l(struct nlmsghdr *n, int maxlen, int type, void *data, int alen) FAST_FUNC;
57 extern int rta_addattr32(struct rtattr *rta, int maxlen, int type, uint32_t data) FAST_FUNC;
58 extern int rta_addattr_l(struct rtattr *rta, int maxlen, int type, void *data, int alen) FAST_FUNC;
59
60 extern void parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len) FAST_FUNC;
61
62 POP_SAVED_FUNCTION_VISIBILITY
63
64 #endif
65