libnetlink.h

   1 #ifndef __LIBNETLINK_H__
   2 #define __LIBNETLINK_H__
   3
   4 #include <stdio.h>
   5 #include <asm/types.h>
   6 #include <linux/netlink.h>
   7 #include <linux/rtnetlink.h>
   8 #include <sys/types.h>
   9
  10 struct rtnl_handle
  11 {
  12     int fd;
  13     struct sockaddr_nl local;
  14     struct sockaddr_nl peer;
  15     __u32 seq;
  16     __u32 dump;
  17 };
  18
  19 int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions);
  20 int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions,
  21                       int protocol);
  22 void rtnl_close(struct rtnl_handle *rth);
  23 int rtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type);
  24 int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len);
  25
  26 typedef int (*rtnl_filter_t)(const struct sockaddr_nl *, struct nlmsghdr *n,
  27                              void *);
  28 int rtnl_dump_filter(struct rtnl_handle *rth, rtnl_filter_t filter,
  29                      void *arg1, rtnl_filter_t junk, void *arg2);
  30 int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
  31               unsigned groups, struct nlmsghdr *answer, rtnl_filter_t junk,
  32               void *jarg);
  33 int rtnl_send(struct rtnl_handle *rth, const char *buf, int);
  34
  35 int addattr8(struct nlmsghdr *n, int maxlen, int type, __u8 data);
  36 int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data);
  37 int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data,
  38               int alen);
  39 int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len);
  40 int rta_addattr8(struct rtattr *rta, int maxlen, int type, __u8 data);
  41 int rta_addattr16(struct rtattr *rta, int maxlen, int type, __u16 data);
  42 int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data);
  43 int rta_addattr64(struct rtattr *rta, int maxlen, int type, __u64 data);
  44 int rta_addattr_l(struct rtattr *rta, int maxlen, int type,
  45                          const void *data, int alen);
  46
  47 int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len);
  48 int parse_rtattr_byindex(struct rtattr *tb[], int max, struct rtattr *rta,
  49                          int len);
  50
  51 struct rtattr *rta_nest(struct rtattr *rta, int maxlen, int type);
  52 int rta_nest_end(struct rtattr *rta, struct rtattr *nest);
  53
  54 #define RTA_TAIL(rta) \
  55                 ((struct rtattr *) (((void *) (rta)) + \
  56                                     RTA_ALIGN((rta)->rta_len)))
  57
  58 #define parse_rtattr_nested(tb, max, rta) \
  59     (parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
  60
  61 int rtnl_listen(struct rtnl_handle *, rtnl_filter_t handler, void *jarg);
  62 int rtnl_from_file(FILE *, rtnl_filter_t handler, void *jarg);
  63
  64 #define NLMSG_TAIL(nmsg) \
  65     ((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
  66
  67 #endif /* __LIBNETLINK_H__ */