mirror of https://github.com/FRRouting/frr.git
113 lines
4.1 KiB
C
113 lines
4.1 KiB
C
// SPDX-License-Identifier: MIT
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/*
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Copyright (c) 2007, 2008 by Juliusz Chroboczek
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Copyright 2011 by Matthieu Boutier and Juliusz Chroboczek
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*/
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#ifndef BABEL_ROUTE_H
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#define BABEL_ROUTE_H
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#include "babel_interface.h"
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#include "source.h"
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enum babel_diversity {
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DIVERSITY_NONE,
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DIVERSITY_INTERFACE_1,
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DIVERSITY_CHANNEL_1,
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DIVERSITY_CHANNEL,
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};
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#define DIVERSITY_HOPS 8
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struct babel_route {
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struct source *src;
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unsigned short refmetric;
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unsigned short cost;
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unsigned short add_metric;
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unsigned short seqno;
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struct neighbour *neigh;
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unsigned char nexthop[16];
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time_t time;
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unsigned short hold_time; /* in seconds */
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unsigned short smoothed_metric; /* for route selection */
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time_t smoothed_metric_time;
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short installed;
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unsigned char channels[DIVERSITY_HOPS];
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struct babel_route *next;
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};
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struct route_stream;
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extern struct babel_route **routes;
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extern int kernel_metric;
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extern enum babel_diversity diversity_kind;
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extern int diversity_factor;
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extern int keep_unfeasible;
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extern int smoothing_half_life;
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static inline int
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route_metric(const struct babel_route *route)
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{
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int m = (int)route->refmetric + route->cost + route->add_metric;
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return MIN(m, INFINITY);
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}
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static inline int
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route_metric_noninterfering(const struct babel_route *route)
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{
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int m =
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(int)route->refmetric +
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(diversity_factor * route->cost + 128) / 256 +
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route->add_metric;
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m = MAX(m, route->refmetric + 1);
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return MIN(m, INFINITY);
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}
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struct babel_route *find_route(const unsigned char *prefix, unsigned char plen,
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struct neighbour *neigh, const unsigned char *nexthop);
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struct babel_route *find_installed_route(const unsigned char *prefix,
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unsigned char plen);
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int installed_routes_estimate(void);
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void flush_route(struct babel_route *route);
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void flush_all_routes(void);
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void flush_neighbour_routes(struct neighbour *neigh);
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void flush_interface_routes(struct interface *ifp, int v4only);
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struct route_stream *route_stream(int installed);
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struct babel_route *route_stream_next(struct route_stream *stream);
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void route_stream_done(struct route_stream *stream);
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void install_route(struct babel_route *route);
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void uninstall_route(struct babel_route *route);
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int route_feasible(struct babel_route *route);
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int route_old(struct babel_route *route);
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int route_expired(struct babel_route *route);
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int route_interferes(struct babel_route *route, struct interface *ifp);
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int update_feasible(struct source *src,
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unsigned short seqno, unsigned short refmetric);
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void change_smoothing_half_life(int half_life);
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int route_smoothed_metric(struct babel_route *route);
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struct babel_route *find_best_route(const unsigned char *prefix, unsigned char plen,
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int feasible, struct neighbour *exclude);
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struct babel_route *install_best_route(const unsigned char prefix[16],
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unsigned char plen);
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void update_neighbour_metric(struct neighbour *neigh, int change);
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void update_interface_metric(struct interface *ifp);
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void update_route_metric(struct babel_route *route);
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struct babel_route *update_route(const unsigned char *id,
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const unsigned char *prefix, unsigned char plen,
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unsigned short seqno, unsigned short refmetric,
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unsigned short interval, struct neighbour *neigh,
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const unsigned char *nexthop,
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const unsigned char *channels, int channels_len);
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void retract_neighbour_routes(struct neighbour *neigh);
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void send_unfeasible_request(struct neighbour *neigh, int force,
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unsigned short seqno, unsigned short metric,
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struct source *src);
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void send_triggered_update(struct babel_route *route,
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struct source *oldsrc, unsigned oldmetric);
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void route_changed(struct babel_route *route,
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struct source *oldsrc, unsigned short oldmetric);
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void route_lost(struct source *src, unsigned oldmetric);
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void expire_routes(void);
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#endif
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