eigrpd/eigrp_metric.h

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * EIGRP Metric Math Functions.
   4  * Copyright (C) 2013-2016
   5  * Authors:
   6  *   Donnie Savage
   7  */
   8
   9 #ifndef _ZEBRA_EIGRP_METRIC_H_
  10 #define _ZEBRA_EIGRP_METRIC_H_
  11
  12 /* Constants */
  13 #define EIGRP_BANDWIDTH_MIN 0x1ull                /* 1 */
  14 #define EIGRP_BANDWIDTH_SCALER 10000000ull        /* Inversion value */
  15 #define EIGRP_BANDWIDTH_MAX 0xffffffffffffffffull /* 1.84467441x10^19 */
  16
  17 #define EIGRP_DELAY_MIN 0x1ull /* 1 */
  18 #define EIGRP_DELAY_PICO 1000000ull
  19 #define EIGRP_DELAY_MAX 0xffffffffffffffffull /* 1.84467441x10^19 */
  20
  21 #define EIGRP_MAX_LOAD 256
  22 #define EIGRP_MAX_HOPS 100
  23
  24 #define EIGRP_INACCESSIBLE 0xFFFFFFFFFFFFFFFFull
  25
  26 #define EIGRP_METRIC_MAX 0xffffffffffffffffull /* 1.84467441x10^19 */
  27 #define EIGRP_METRIC_MAX_CLASSIC 0xffffffff
  28 #define EIGRP_METRIC_SCALER 65536              /* CLASSIC to WIDE conversion */
  29
  30 #define EIGRP_CLASSIC_MAX 0xffffffff /* 4294967295 */
  31 #define EIGRP_CLASSIC_SCALER 256     /* IGRP to EIGRP conversion */
  32
  33
  34 /* Prototypes */
  35 extern eigrp_scaled_t eigrp_bandwidth_to_scaled(eigrp_bandwidth_t bw);
  36 extern eigrp_bandwidth_t eigrp_scaled_to_bandwidth(eigrp_scaled_t scale);
  37 extern eigrp_scaled_t eigrp_delay_to_scaled(eigrp_delay_t delay);
  38 extern eigrp_delay_t eigrp_scaled_to_delay(eigrp_scaled_t scale);
  39
  40 extern eigrp_metric_t eigrp_calculate_metrics(struct eigrp *eigrp,
  41                                               struct eigrp_metrics metric);
  42 extern eigrp_metric_t
  43 eigrp_calculate_total_metrics(struct eigrp *eigrp,
  44                               struct eigrp_route_descriptor *rd);
  45 extern bool eigrp_metrics_is_same(struct eigrp_metrics m1,
  46                                   struct eigrp_metrics m2);
  47
  48 #endif /* _ZEBRA_EIGRP_METRIC_H_ */