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// SPDX-License-Identifier: MIT
/*
Copyright 2011 by Matthieu Boutier and Juliusz Chroboczek
*/
#ifndef BABEL_INTERFACE_H
#define BABEL_INTERFACE_H
#include <zebra.h>
#include "zclient.h"
#include "vty.h"
#include "distribute.h"
#define CONFIG_DEFAULT 0
#define CONFIG_NO 1
#define CONFIG_YES 2
/* babeld interface information */
struct babel_interface {
unsigned short flags; /* see below */
unsigned short cost;
int channel;
struct timeval hello_timeout;
struct timeval update_timeout;
struct timeval flush_timeout;
struct timeval update_flush_timeout;
unsigned char *ipv4;
int buffered;
int bufsize;
/* Relative position of the Hello message in the send buffer, or
(-1) if there is none. */
int buffered_hello;
char have_buffered_id;
char have_buffered_nh;
char have_buffered_prefix;
unsigned char buffered_id[8];
unsigned char buffered_nh[4];
unsigned char buffered_prefix[16];
unsigned char *sendbuf;
struct buffered_update *buffered_updates;
int num_buffered_updates;
int update_bufsize;
time_t bucket_time;
unsigned int bucket;
time_t last_update_time;
unsigned short hello_seqno;
unsigned hello_interval;
unsigned update_interval;
/* A higher value means we forget old RTT samples faster. Must be
between 1 and 256, inclusive. */
unsigned int rtt_decay;
/* Parameters for computing the cost associated to RTT. */
unsigned int rtt_min;
unsigned int rtt_max;
unsigned int max_rtt_penalty;
/* For filter type slot. */
struct access_list *list[DISTRIBUTE_MAX]; /* Access-list. */
struct prefix_list *prefix[DISTRIBUTE_MAX]; /* Prefix-list. */
};
typedef struct babel_interface babel_interface_nfo;
static inline babel_interface_nfo* babel_get_if_nfo(struct interface *ifp)
{
return ((babel_interface_nfo*) ifp->info);
}
/* babel_interface_nfo flags */
#define BABEL_IF_IS_UP (1 << 0)
#define BABEL_IF_WIRED (1 << 1)
#define BABEL_IF_SPLIT_HORIZON (1 << 2)
#define BABEL_IF_LQ (1 << 3)
#define BABEL_IF_FARAWAY (1 << 4)
#define BABEL_IF_TIMESTAMPS (1 << 5)
/* Only INTERFERING can appear on the wire. */
#define BABEL_IF_CHANNEL_UNKNOWN 0
#define BABEL_IF_CHANNEL_INTERFERING 255
#define BABEL_IF_CHANNEL_NONINTERFERING -2
static inline int
if_up(struct interface *ifp)
{
return (if_is_operative(ifp) &&
ifp->connected != NULL &&
CHECK_FLAG(babel_get_if_nfo(ifp)->flags, BABEL_IF_IS_UP));
}
struct buffered_update {
unsigned char id[8];
unsigned char prefix[16];
unsigned char plen;
unsigned char pad[3];
};
/* init function */
void babel_if_init(void);
/* Callback functions for zebra client */
int babel_interface_up (int, struct zclient *, zebra_size_t, vrf_id_t);
int babel_interface_down (int, struct zclient *, zebra_size_t, vrf_id_t);
int babel_interface_add (int, struct zclient *, zebra_size_t, vrf_id_t);
int babel_interface_delete (int, struct zclient *, zebra_size_t, vrf_id_t);
int babel_interface_address_add (int, struct zclient *, zebra_size_t, vrf_id_t);
int babel_interface_address_delete (int, struct zclient *, zebra_size_t, vrf_id_t);
int babel_ifp_create(struct interface *ifp);
int babel_ifp_up(struct interface *ifp);
int babel_ifp_down(struct interface *ifp);
int babel_ifp_destroy(struct interface *ifp);
unsigned jitter(babel_interface_nfo *, int);
unsigned update_jitter(babel_interface_nfo *babel_ifp, int urgent);
/* return "true" if "address" is one of our ipv6 addresses */
int is_interface_ll_address(struct interface *ifp, const unsigned char *address);
/* Send retraction to all, and reset all interfaces statistics. */
void babel_interface_close_all(void);
extern int babel_enable_if_config_write (struct vty *);
#endif
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