1 #ifndef __LIBNETLINK_H__
2 #define __LIBNETLINK_H__ 1
7 #include <linux/netlink.h>
8 #include <linux/rtnetlink.h>
9 #include <linux/if_link.h>
10 #include <linux/if_addr.h>
11 #include <linux/neighbour.h>
12 #include <linux/netconf.h>
13 #include <arpa/inet.h>
17 struct sockaddr_nl local
;
18 struct sockaddr_nl peer
;
23 #define RTNL_HANDLE_F_LISTEN_ALL_NSID 0x01
29 int rtnl_open(struct rtnl_handle
*rth
, unsigned int subscriptions
)
30 __attribute__((warn_unused_result
));
32 int rtnl_open_byproto(struct rtnl_handle
*rth
, unsigned int subscriptions
,
34 __attribute__((warn_unused_result
));
36 void rtnl_close(struct rtnl_handle
*rth
);
37 int rtnl_wilddump_request(struct rtnl_handle
*rth
, int fam
, int type
)
38 __attribute__((warn_unused_result
));
39 int rtnl_wilddump_req_filter(struct rtnl_handle
*rth
, int fam
, int type
,
41 __attribute__((warn_unused_result
));
43 typedef int (*req_filter_fn_t
)(struct nlmsghdr
*nlh
, int reqlen
);
45 int rtnl_wilddump_req_filter_fn(struct rtnl_handle
*rth
, int fam
, int type
,
47 __attribute__((warn_unused_result
));
48 int rtnl_wilddump_stats_req_filter(struct rtnl_handle
*rth
, int fam
, int type
,
50 __attribute__((warn_unused_result
));
51 int rtnl_dump_request(struct rtnl_handle
*rth
, int type
, void *req
,
53 __attribute__((warn_unused_result
));
54 int rtnl_dump_request_n(struct rtnl_handle
*rth
, struct nlmsghdr
*n
)
55 __attribute__((warn_unused_result
));
57 struct rtnl_ctrl_data
{
61 typedef int (*rtnl_filter_t
)(const struct sockaddr_nl
*,
62 struct nlmsghdr
*n
, void *);
64 typedef int (*rtnl_listen_filter_t
)(const struct sockaddr_nl
*,
65 struct rtnl_ctrl_data
*,
66 struct nlmsghdr
*n
, void *);
68 struct rtnl_dump_filter_arg
{
74 int rtnl_dump_filter_l(struct rtnl_handle
*rth
,
75 const struct rtnl_dump_filter_arg
*arg
);
76 int rtnl_dump_filter_nc(struct rtnl_handle
*rth
,
78 void *arg
, __u16 nc_flags
);
79 #define rtnl_dump_filter(rth, filter, arg) \
80 rtnl_dump_filter_nc(rth, filter, arg, 0)
81 int rtnl_talk(struct rtnl_handle
*rtnl
, struct nlmsghdr
*n
,
82 struct nlmsghdr
*answer
, size_t len
)
83 __attribute__((warn_unused_result
));
84 int rtnl_talk_suppress_rtnl_errmsg(struct rtnl_handle
*rtnl
, struct nlmsghdr
*n
,
85 struct nlmsghdr
*answer
, size_t len
)
86 __attribute__((warn_unused_result
));
87 int rtnl_send(struct rtnl_handle
*rth
, const void *buf
, int)
88 __attribute__((warn_unused_result
));
89 int rtnl_send_check(struct rtnl_handle
*rth
, const void *buf
, int)
90 __attribute__((warn_unused_result
));
92 int addattr(struct nlmsghdr
*n
, int maxlen
, int type
);
93 int addattr8(struct nlmsghdr
*n
, int maxlen
, int type
, __u8 data
);
94 int addattr16(struct nlmsghdr
*n
, int maxlen
, int type
, __u16 data
);
95 int addattr32(struct nlmsghdr
*n
, int maxlen
, int type
, __u32 data
);
96 int addattr64(struct nlmsghdr
*n
, int maxlen
, int type
, __u64 data
);
97 int addattrstrz(struct nlmsghdr
*n
, int maxlen
, int type
, const char *data
);
99 int addattr_l(struct nlmsghdr
*n
, int maxlen
, int type
,
100 const void *data
, int alen
);
101 int addraw_l(struct nlmsghdr
*n
, int maxlen
, const void *data
, int len
);
102 struct rtattr
*addattr_nest(struct nlmsghdr
*n
, int maxlen
, int type
);
103 int addattr_nest_end(struct nlmsghdr
*n
, struct rtattr
*nest
);
104 struct rtattr
*addattr_nest_compat(struct nlmsghdr
*n
, int maxlen
, int type
,
105 const void *data
, int len
);
106 int addattr_nest_compat_end(struct nlmsghdr
*n
, struct rtattr
*nest
);
107 int rta_addattr8(struct rtattr
*rta
, int maxlen
, int type
, __u8 data
);
108 int rta_addattr16(struct rtattr
*rta
, int maxlen
, int type
, __u16 data
);
109 int rta_addattr32(struct rtattr
*rta
, int maxlen
, int type
, __u32 data
);
110 int rta_addattr64(struct rtattr
*rta
, int maxlen
, int type
, __u64 data
);
111 int rta_addattr_l(struct rtattr
*rta
, int maxlen
, int type
,
112 const void *data
, int alen
);
114 int parse_rtattr(struct rtattr
*tb
[], int max
, struct rtattr
*rta
, int len
);
115 int parse_rtattr_flags(struct rtattr
*tb
[], int max
, struct rtattr
*rta
,
116 int len
, unsigned short flags
);
117 int parse_rtattr_byindex(struct rtattr
*tb
[], int max
,
118 struct rtattr
*rta
, int len
);
119 struct rtattr
*parse_rtattr_one(int type
, struct rtattr
*rta
, int len
);
120 int __parse_rtattr_nested_compat(struct rtattr
*tb
[], int max
, struct rtattr
*rta
, int len
);
122 struct rtattr
*rta_nest(struct rtattr
*rta
, int maxlen
, int type
);
123 int rta_nest_end(struct rtattr
*rta
, struct rtattr
*nest
);
125 #define RTA_TAIL(rta) \
126 ((struct rtattr *) (((void *) (rta)) + \
127 RTA_ALIGN((rta)->rta_len)))
129 #define parse_rtattr_nested(tb, max, rta) \
130 (parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
132 #define parse_rtattr_one_nested(type, rta) \
133 (parse_rtattr_one(type, RTA_DATA(rta), RTA_PAYLOAD(rta)))
135 #define parse_rtattr_nested_compat(tb, max, rta, data, len) \
136 ({ data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
137 __parse_rtattr_nested_compat(tb, max, rta, len); })
139 static inline __u8
rta_getattr_u8(const struct rtattr
*rta
)
141 return *(__u8
*)RTA_DATA(rta
);
143 static inline __u16
rta_getattr_u16(const struct rtattr
*rta
)
145 return *(__u16
*)RTA_DATA(rta
);
147 static inline __be16
rta_getattr_be16(const struct rtattr
*rta
)
149 return ntohs(rta_getattr_u16(rta
));
151 static inline __u32
rta_getattr_u32(const struct rtattr
*rta
)
153 return *(__u32
*)RTA_DATA(rta
);
155 static inline __be32
rta_getattr_be32(const struct rtattr
*rta
)
157 return ntohl(rta_getattr_u32(rta
));
159 static inline __u64
rta_getattr_u64(const struct rtattr
*rta
)
163 memcpy(&tmp
, RTA_DATA(rta
), sizeof(__u64
));
166 static inline const char *rta_getattr_str(const struct rtattr
*rta
)
168 return (const char *)RTA_DATA(rta
);
171 int rtnl_listen_all_nsid(struct rtnl_handle
*);
172 int rtnl_listen(struct rtnl_handle
*, rtnl_listen_filter_t handler
,
174 int rtnl_from_file(FILE *, rtnl_listen_filter_t handler
,
177 #define NLMSG_TAIL(nmsg) \
178 ((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
182 ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
185 #define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ifaddrmsg))
189 #define IFLA_RTA(r) \
190 ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
193 #define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg))
198 ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
201 #define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ndmsg))
205 #define NDTA_RTA(r) \
206 ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg))))
209 #define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ndtmsg))
213 #define NETNS_RTA(r) \
214 ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct rtgenmsg))))
216 #ifndef NETNS_PAYLOAD
217 #define NETNS_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct rtgenmsg))
220 #ifndef IFLA_STATS_RTA
221 #define IFLA_STATS_RTA(r) \
222 ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct if_stats_msg))))
225 /* User defined nlmsg_type which is used mostly for logging netlink
226 * messages from dump file */
227 #define NLMSG_TSTAMP 15
229 #endif /* __LIBNETLINK_H__ */