1 #ifndef __LIBNETLINK_H__
2 #define __LIBNETLINK_H__ 1
3
4 #include <string.h>
5 #include <asm/types.h>
6 #include <linux/netlink.h>
7 #include <linux/rtnetlink.h>
8 #include <linux/if_link.h>
9 #include <linux/if_addr.h>
10 #include <linux/neighbour.h>
11
12 struct rtnl_handle
13 {
14 int fd;
15 struct sockaddr_nl local;
16 struct sockaddr_nl peer;
17 __u32 seq;
18 __u32 dump;
19 };
20
21 extern int rcvbuf;
22
23 extern int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions);
24 extern int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions, int protocol);
25 extern void rtnl_close(struct rtnl_handle *rth);
26 extern int rtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type);
27 extern int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len);
28
29 typedef int (*rtnl_filter_t)(const struct sockaddr_nl *,
30 struct nlmsghdr *n, void *);
31
32 struct rtnl_dump_filter_arg
33 {
34 rtnl_filter_t filter;
35 void *arg1;
36 };
37
38 extern int rtnl_dump_filter_l(struct rtnl_handle *rth,
39 const struct rtnl_dump_filter_arg *arg);
40 extern int rtnl_dump_filter(struct rtnl_handle *rth, rtnl_filter_t filter,
41 void *arg);
42 extern int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
43 unsigned groups, struct nlmsghdr *answer);
44 extern int rtnl_send(struct rtnl_handle *rth, const void *buf, int);
45 extern int rtnl_send_check(struct rtnl_handle *rth, const void *buf, int);
46
47 extern int addattr(struct nlmsghdr *n, int maxlen, int type);
48 extern int addattr8(struct nlmsghdr *n, int maxlen, int type, __u8 data);
49 extern int addattr16(struct nlmsghdr *n, int maxlen, int type, __u16 data);
50 extern int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data);
51 extern int addattr64(struct nlmsghdr *n, int maxlen, int type, __u64 data);
52 extern int addattrstrz(struct nlmsghdr *n, int maxlen, int type, const char *data);
53
54 extern int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data, int alen);
55 extern int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len);
56 extern struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type);
57 extern int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest);
58 extern struct rtattr *addattr_nest_compat(struct nlmsghdr *n, int maxlen, int type, const void *data, int len);
59 extern int addattr_nest_compat_end(struct nlmsghdr *n, struct rtattr *nest);
60 extern int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data);
61 extern int rta_addattr_l(struct rtattr *rta, int maxlen, int type, const void *data, int alen);
62
63 extern int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len);
64 extern int parse_rtattr_byindex(struct rtattr *tb[], int max, struct rtattr *rta, int len);
65 extern int __parse_rtattr_nested_compat(struct rtattr *tb[], int max, struct rtattr *rta, int len);
66
67 #define parse_rtattr_nested(tb, max, rta) \
68 (parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
69
70 #define parse_rtattr_nested_compat(tb, max, rta, data, len) \
71 ({ data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
72 __parse_rtattr_nested_compat(tb, max, rta, len); })
73
rta_getattr_u8(const struct rtattr * rta)74 static inline __u8 rta_getattr_u8(const struct rtattr *rta)
75 {
76 return *(__u8 *)RTA_DATA(rta);
77 }
rta_getattr_u16(const struct rtattr * rta)78 static inline __u16 rta_getattr_u16(const struct rtattr *rta)
79 {
80 return *(__u16 *)RTA_DATA(rta);
81 }
rta_getattr_u32(const struct rtattr * rta)82 static inline __u32 rta_getattr_u32(const struct rtattr *rta)
83 {
84 return *(__u32 *)RTA_DATA(rta);
85 }
rta_getattr_u64(const struct rtattr * rta)86 static inline __u64 rta_getattr_u64(const struct rtattr *rta)
87 {
88 __u64 tmp;
89 memcpy(&tmp, RTA_DATA(rta), sizeof(__u64));
90 return tmp;
91 }
rta_getattr_str(const struct rtattr * rta)92 static inline const char *rta_getattr_str(const struct rtattr *rta)
93 {
94 return (const char *)RTA_DATA(rta);
95 }
96
97 extern int rtnl_listen(struct rtnl_handle *, rtnl_filter_t handler,
98 void *jarg);
99 extern int rtnl_from_file(FILE *, rtnl_filter_t handler,
100 void *jarg);
101
102 #define NLMSG_TAIL(nmsg) \
103 ((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
104
105 #ifndef IFA_RTA
106 #define IFA_RTA(r) \
107 ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
108 #endif
109 #ifndef IFA_PAYLOAD
110 #define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
111 #endif
112
113 #ifndef IFLA_RTA
114 #define IFLA_RTA(r) \
115 ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
116 #endif
117 #ifndef IFLA_PAYLOAD
118 #define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
119 #endif
120
121 #ifndef NDA_RTA
122 #define NDA_RTA(r) \
123 ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
124 #endif
125 #ifndef NDA_PAYLOAD
126 #define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndmsg))
127 #endif
128
129 #ifndef NDTA_RTA
130 #define NDTA_RTA(r) \
131 ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg))))
132 #endif
133 #ifndef NDTA_PAYLOAD
134 #define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndtmsg))
135 #endif
136
137 #endif /* __LIBNETLINK_H__ */
138
139