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/* $OpenBSD: rde.h,v 1.9 2016/06/05 03:36:41 renato Exp $ */
/*
* Copyright (c) 2015 Renato Westphal <renato@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _RDE_H_
#define _RDE_H_
#include <sys/types.h>
#include <sys/time.h>
#include <sys/tree.h>
#include <sys/queue.h>
#include <event.h>
#include <limits.h>
/* just the info RDE needs */
struct rde_nbr {
RB_ENTRY(rde_nbr) entry;
uint32_t peerid;
uint32_t ifaceid;
union eigrpd_addr addr;
struct eigrp_iface *ei;
struct eigrp *eigrp;
TAILQ_HEAD(,reply_node) rijk; /* outstanding replies */
uint8_t flags;
};
/*
* We have one "self" neighbor for each interface on which EIGRP is configured.
* This way we can inject local routes into the DUAL FSM just like any other
* route received from a remote neighbor. For each instance, we also have two
* additional special neighbors used to inject redistributed and summarized
* routes.
*/
#define F_RDE_NBR_SELF 0x01
#define F_RDE_NBR_LOCAL 0x02
#define F_RDE_NBR_REDIST 0x04
#define F_RDE_NBR_SUMMARY 0x08
struct reply_node {
TAILQ_ENTRY(reply_node) rn_entry;
TAILQ_ENTRY(reply_node) nbr_entry;
struct event ev_active_timeout;
struct event ev_sia_timeout;
int siaquery_sent;
int siareply_recv;
struct rt_node *rn;
struct rde_nbr *nbr;
};
struct eigrp_route {
TAILQ_ENTRY(eigrp_route) entry;
struct rde_nbr *nbr; /* advertising nbr */
enum route_type type;
union eigrpd_addr nexthop;
uint32_t distance; /* local distance */
uint32_t rdistance; /* reported distance */
struct classic_metric metric; /* metric */
struct classic_emetric emetric; /* external metric */
uint8_t flags;
};
#define F_EIGRP_ROUTE_INSTALLED 0x01
#define F_EIGRP_ROUTE_M_CHANGED 0x02
struct rt_node {
RB_ENTRY(rt_node) entry;
struct eigrp *eigrp;
union eigrpd_addr prefix;
uint8_t prefixlen;
int state;
TAILQ_HEAD(,eigrp_route) routes;
TAILQ_HEAD(,reply_node) rijk; /* outstanding replies */
struct {
struct rde_nbr *nbr;
enum route_type type;
uint32_t fdistance;
uint32_t rdistance;
struct classic_metric metric;
struct classic_emetric emetric;
} successor;
};
/* DUAL states */
#define DUAL_STA_PASSIVE 0x0001
#define DUAL_STA_ACTIVE0 0x0002
#define DUAL_STA_ACTIVE1 0x0004
#define DUAL_STA_ACTIVE2 0x0008
#define DUAL_STA_ACTIVE3 0x0010
#define DUAL_STA_ACTIVE_ALL (DUAL_STA_ACTIVE0 | DUAL_STA_ACTIVE1 | \
DUAL_STA_ACTIVE2 | DUAL_STA_ACTIVE3)
enum dual_event {
DUAL_EVT_1,
DUAL_EVT_2,
DUAL_EVT_3,
DUAL_EVT_4,
DUAL_EVT_5,
DUAL_EVT_6,
DUAL_EVT_7,
DUAL_EVT_8,
DUAL_EVT_9,
DUAL_EVT_10,
DUAL_EVT_11,
DUAL_EVT_12,
DUAL_EVT_13,
DUAL_EVT_14,
DUAL_EVT_15,
DUAL_EVT_16
};
/* rde.c */
pid_t rde(int, int);
int rde_imsg_compose_parent(int, pid_t, void *, uint16_t);
int rde_imsg_compose_eigrpe(int, uint32_t, pid_t, void *,
uint16_t);
void rde_instance_init(struct eigrp *);
void rde_instance_del(struct eigrp *);
void rde_send_change_kroute(struct rt_node *, struct eigrp_route *);
void rde_send_delete_kroute(struct rt_node *, struct eigrp_route *);
void rt_redist_set(struct kroute *, int);
void rt_summary_set(struct eigrp *, struct summary_addr *,
struct classic_metric *);
void rt_snap(struct rde_nbr *);
struct ctl_rt *rt_to_ctl(struct rt_node *, struct eigrp_route *);
void rt_dump(struct ctl_show_topology_req *, pid_t);
/* rde_nbr.c */
struct rde_nbr *rde_nbr_find(uint32_t);
struct rde_nbr *rde_nbr_new(uint32_t, struct rde_nbr *);
void rde_nbr_del(struct rde_nbr *, int);
/* rde_dual.c */
int dual_fsm(struct rt_node *, enum dual_event);
struct rt_node *rt_find(struct eigrp *, struct rinfo *);
struct rt_node *rt_new(struct eigrp *, struct rinfo *);
void rt_del(struct rt_node *);
struct eigrp_route *route_find(struct rde_nbr *, struct rt_node *);
struct eigrp_route *route_new(struct rt_node *, struct rde_nbr *,
struct rinfo *);
void route_del(struct rt_node *, struct eigrp_route *);
uint32_t safe_sum_uint32(uint32_t, uint32_t);
uint32_t safe_mul_uint32(uint32_t, uint32_t);
uint32_t eigrp_composite_delay(uint32_t);
uint32_t eigrp_real_delay(uint32_t);
uint32_t eigrp_composite_bandwidth(uint32_t);
uint32_t eigrp_real_bandwidth(uint32_t);
uint32_t route_composite_metric(uint8_t *, uint32_t, uint32_t,
uint8_t, uint8_t);
void route_update_metrics(struct eigrp *,
struct eigrp_route *, struct rinfo *);
void reply_outstanding_add(struct rt_node *,
struct rde_nbr *);
struct reply_node *reply_outstanding_find(struct rt_node *,
struct rde_nbr *);
void reply_outstanding_remove(struct reply_node *);
void rinfo_fill_successor(struct rt_node *, struct rinfo *);
void rinfo_fill_infinite(struct rt_node *, enum route_type,
struct rinfo *);
void rt_update_fib(struct rt_node *);
void rt_set_successor(struct rt_node *,
struct eigrp_route *);
struct eigrp_route *rt_get_successor_fc(struct rt_node *);
struct summary_addr *rde_summary_check(struct eigrp_iface *,
union eigrpd_addr *, uint8_t);
void rde_send_update(struct eigrp_iface *, struct rinfo *);
void rde_send_update_all(struct rt_node *, struct rinfo *);
void rde_send_query(struct eigrp_iface *, struct rinfo *,
int);
void rde_send_siaquery(struct rde_nbr *, struct rinfo *);
void rde_send_query_all(struct eigrp *, struct rt_node *,
int);
void rde_flush_queries(void);
void rde_send_reply(struct rde_nbr *, struct rinfo *, int);
void rde_check_update(struct rde_nbr *, struct rinfo *);
void rde_check_query(struct rde_nbr *, struct rinfo *, int);
void rde_last_reply(struct rt_node *);
void rde_check_reply(struct rde_nbr *, struct rinfo *, int);
void rde_check_link_down_rn(struct rde_nbr *,
struct rt_node *, struct eigrp_route *);
void rde_check_link_down_nbr(struct rde_nbr *);
void rde_check_link_down(unsigned int);
void rde_check_link_cost_change(struct rde_nbr *,
struct eigrp_iface *);
#endif /* _RDE_H_ */
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