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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* OSPF Neighbor functions.
* Copyright (C) 1999, 2000 Toshiaki Takada
*/
#ifndef _ZEBRA_OSPF_NEIGHBOR_H
#define _ZEBRA_OSPF_NEIGHBOR_H
#include <ospfd/ospf_gr.h>
#include <ospfd/ospf_packet.h>
/* Neighbor Data Structure */
struct ospf_neighbor {
/* This neighbor's parent ospf interface. */
struct ospf_interface *oi;
/* OSPF neighbor Information */
uint8_t state; /* NSM status. */
uint8_t dd_flags; /* DD bit flags. */
uint32_t dd_seqnum; /* DD Sequence Number. */
/* Neighbor Information from Hello. */
struct prefix address; /* Neighbor Interface Address. */
struct in_addr src; /* Src address. */
struct in_addr router_id; /* Router ID. */
uint8_t options; /* Options. */
int priority; /* Router Priority. */
struct in_addr d_router; /* Designated Router. */
struct in_addr bd_router; /* Backup Designated Router. */
/* Last sent Database Description packet. */
struct ospf_packet *last_send;
/* Timestemp when last Database Description packet was sent */
struct timeval last_send_ts;
/* Last received Databse Description packet. */
struct {
uint8_t options;
uint8_t flags;
uint32_t dd_seqnum;
} last_recv;
/* LSA data. */
struct ospf_lsdb ls_rxmt;
struct ospf_lsdb db_sum;
struct ospf_lsdb ls_req;
struct ospf_lsa *ls_req_last;
uint32_t crypt_seqnum; /* Cryptographic Sequence Number. */
/* Timer values. */
uint32_t v_inactivity;
uint32_t v_db_desc;
uint32_t v_ls_req;
uint32_t v_ls_upd;
/* Threads. */
struct event *t_inactivity;
struct event *t_db_desc;
struct event *t_ls_req;
struct event *t_ls_upd;
struct event *t_hello_reply;
/* NBMA configured neighbour */
struct ospf_nbr_nbma *nbr_nbma;
/* Statistics */
struct timeval ts_last_progress; /* last advance of NSM */
struct timeval ts_last_regress; /* last regressive NSM change */
const char *last_regress_str; /* Event which last regressed NSM */
uint32_t state_change; /* NSM state change counter */
/* BFD information */
struct bfd_session_params *bfd_session;
/* ospf graceful restart HELPER info */
struct ospf_helper_info gr_helper_info;
};
/* Macros. */
#define NBR_IS_DR(n) IPV4_ADDR_SAME (&n->address.u.prefix4, &n->d_router)
#define NBR_IS_BDR(n) IPV4_ADDR_SAME (&n->address.u.prefix4, &n->bd_router)
/* Prototypes. */
extern struct ospf_neighbor *ospf_nbr_new(struct ospf_interface *);
extern void ospf_nbr_free(struct ospf_neighbor *);
extern void ospf_nbr_delete(struct ospf_neighbor *);
extern int ospf_nbr_bidirectional(struct in_addr *, struct in_addr *, int);
extern void ospf_nbr_self_reset(struct ospf_interface *, struct in_addr);
extern void ospf_nbr_add_self(struct ospf_interface *, struct in_addr);
extern int ospf_nbr_count(struct ospf_interface *, int);
extern int ospf_nbr_count_opaque_capable(struct ospf_interface *);
extern struct ospf_neighbor *ospf_nbr_get(struct ospf_interface *,
struct ospf_header *, struct ip *,
struct prefix *);
extern struct ospf_neighbor *ospf_nbr_lookup(struct ospf_interface *,
struct ip *, struct ospf_header *);
extern struct ospf_neighbor *ospf_nbr_lookup_by_addr(struct route_table *,
struct in_addr *);
extern struct ospf_neighbor *ospf_nbr_lookup_by_routerid(struct route_table *,
struct in_addr *);
extern void ospf_renegotiate_optional_capabilities(struct ospf *top);
#endif /* _ZEBRA_OSPF_NEIGHBOR_H */
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