networking/libiproute/libnetlink.h

   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?
  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