babeld/neighbour.h

   1 // SPDX-License-Identifier: MIT
   2 /*
   3 Copyright (c) 2007, 2008 by Juliusz Chroboczek
   4 */
   5
   6 #ifndef BABEL_NEIGHBOUR_H
   7 #define BABEL_NEIGHBOUR_H
   8
   9 struct neighbour {
  10     struct neighbour *next;
  11     /* This is -1 when unknown, so don't make it unsigned */
  12     int hello_seqno;
  13     unsigned char address[16];
  14     unsigned short reach;
  15     unsigned short txcost;
  16     struct timeval hello_time;
  17     struct timeval ihu_time;
  18     unsigned short hello_interval; /* in centiseconds */
  19     unsigned short ihu_interval;   /* in centiseconds */
  20     /* Used for RTT estimation. */
  21     /* Absolute time (modulo 2^32) at which the Hello was sent,
  22        according to remote clock. */
  23     unsigned int hello_send_us;
  24     struct timeval hello_rtt_receive_time;
  25     unsigned int rtt;
  26     struct timeval rtt_time;
  27     struct interface *ifp;
  28 };
  29
  30 extern struct neighbour *neighs;
  31
  32 #define FOR_ALL_NEIGHBOURS(_neigh) \
  33     for(_neigh = neighs; _neigh; _neigh = _neigh->next)
  34
  35 int neighbour_valid(struct neighbour *neigh);
  36 void flush_neighbour(struct neighbour *neigh);
  37 struct neighbour *find_neighbour(const unsigned char *address,
  38                                  struct interface *ifp);
  39 int update_neighbour(struct neighbour *neigh, int hello, int hello_interval);
  40 unsigned check_neighbours(void);
  41 unsigned neighbour_txcost(struct neighbour *neigh);
  42 unsigned neighbour_rxcost(struct neighbour *neigh);
  43 unsigned neighbour_rttcost(struct neighbour *neigh);
  44 unsigned neighbour_cost(struct neighbour *neigh);
  45 int valid_rtt(struct neighbour *neigh);
  46
  47 #endif /* BABEL_NEIGHBOUR_H */