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libnetlink.h

#ifndef __LIBNETLINK_H__
#define __LIBNETLINK_H__ 1

#include <asm/types.h>
// needed by netlink.h, should be in there
#include <arpa/inet.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>

struct rtnl_handle
{
      int               fd;
      struct sockaddr_nl      local;
      struct sockaddr_nl      peer;
      __u32             seq;
      __u32             dump;
};

extern int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions);
extern int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions, int protocol);
extern void rtnl_close(struct rtnl_handle *rth);
extern int rtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type);
extern int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len);

typedef int (*rtnl_filter_t)(const struct sockaddr_nl *,
                       struct nlmsghdr *n, void *);
extern int rtnl_dump_filter(struct rtnl_handle *rth, rtnl_filter_t filter,
                      void *arg1,
                      rtnl_filter_t junk,
                      void *arg2);
extern int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
                 unsigned groups, struct nlmsghdr *answer,
                 rtnl_filter_t junk,
                 void *jarg);
extern int rtnl_send(struct rtnl_handle *rth, const char *buf, int);


extern int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data);
extern int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data, int alen);
extern int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len);
extern int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data);
extern int rta_addattr_l(struct rtattr *rta, int maxlen, int type, const void *data, int alen);

extern int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len);
extern int parse_rtattr_byindex(struct rtattr *tb[], int max, struct rtattr *rta, int len);

#define parse_rtattr_nested(tb, max, rta) \
      (parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))

extern int rtnl_listen(struct rtnl_handle *, rtnl_filter_t handler,
                   void *jarg);
extern int rtnl_from_file(FILE *, rtnl_filter_t handler,
                   void *jarg);

#define NLMSG_TAIL(nmsg) \
      ((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))

#ifndef IFA_RTA
#define IFA_RTA(r) \
      ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
#endif
#ifndef IFA_PAYLOAD
#define IFA_PAYLOAD(n)  NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
#endif

#ifndef IFLA_RTA
#define IFLA_RTA(r) \
      ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
#endif
#ifndef IFLA_PAYLOAD
#define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
#endif

#ifndef NDA_RTA
#define NDA_RTA(r) \
      ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
#endif
#ifndef NDA_PAYLOAD
#define NDA_PAYLOAD(n)  NLMSG_PAYLOAD(n,sizeof(struct ndmsg))
#endif

#ifndef NDTA_RTA
#define NDTA_RTA(r) \
      ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg))))
#endif
#ifndef NDTA_PAYLOAD
#define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndtmsg))
#endif

#endif /* __LIBNETLINK_H__ */


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