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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* OSPF Interface functions.
* Copyright (C) 1999 Toshiaki Takada
*/
#ifndef _ZEBRA_OSPF_INTERFACE_H
#define _ZEBRA_OSPF_INTERFACE_H
#include "lib/bfd.h"
#include "qobj.h"
#include "hook.h"
#include "ospfd/ospf_packet.h"
#include "ospfd/ospf_spf.h"
#define IF_OSPF_IF_INFO(I) ((struct ospf_if_info *)((I)->info))
#define IF_DEF_PARAMS(I) (IF_OSPF_IF_INFO (I)->def_params)
#define IF_OIFS(I) (IF_OSPF_IF_INFO (I)->oifs)
#define IF_OIFS_PARAMS(I) (IF_OSPF_IF_INFO (I)->params)
/* Despite the name, this macro probably is for specialist use only */
#define OSPF_IF_PARAM_CONFIGURED(S, P) ((S) && (S)->P##__config)
/* Test whether an OSPF interface parameter is set, generally, given some
* existing ospf interface
*/
#define OSPF_IF_PARAM_IS_SET(O, P) \
(OSPF_IF_PARAM_CONFIGURED((O)->params, P) \
|| OSPF_IF_PARAM_CONFIGURED(IF_DEF_PARAMS((O)->ifp)->P))
#define OSPF_IF_PARAM(O, P) \
(OSPF_IF_PARAM_CONFIGURED((O)->params, P) \
? (O)->params->P \
: IF_DEF_PARAMS((O)->ifp)->P)
#define DECLARE_IF_PARAM(T, P) \
T P; \
uint8_t P##__config : 1
#define UNSET_IF_PARAM(S, P) ((S)->P##__config) = 0
#define SET_IF_PARAM(S, P) ((S)->P##__config) = 1
struct ospf_if_params {
DECLARE_IF_PARAM(uint32_t,
transmit_delay); /* Interface Transmisson Delay */
DECLARE_IF_PARAM(uint32_t,
output_cost_cmd); /* Command Interface Output Cost */
DECLARE_IF_PARAM(uint32_t,
retransmit_interval); /* Retransmission Interval */
DECLARE_IF_PARAM(uint8_t, passive_interface); /* OSPF Interface is
passive: no sending or
receiving (no need to
join multicast groups)
*/
DECLARE_IF_PARAM(uint8_t, priority); /* OSPF Interface priority */
/* Enable OSPF on this interface with area if_area */
DECLARE_IF_PARAM(struct in_addr, if_area);
uint32_t if_area_id_fmt;
DECLARE_IF_PARAM(uint8_t, type); /* type of interface */
#define OSPF_IF_ACTIVE 0
#define OSPF_IF_PASSIVE 1
#define OSPF_IF_PASSIVE_STATUS(O) \
(OSPF_IF_PARAM_CONFIGURED((O)->params, passive_interface) \
? (O)->params->passive_interface \
: (OSPF_IF_PARAM_CONFIGURED(IF_DEF_PARAMS((O)->ifp), \
passive_interface) \
? IF_DEF_PARAMS((O)->ifp)->passive_interface \
: (O)->ospf->passive_interface_default))
DECLARE_IF_PARAM(uint32_t, v_hello); /* Hello Interval */
DECLARE_IF_PARAM(uint32_t, v_wait); /* Router Dead Interval */
bool is_v_wait_set; /* Check for Dead Interval set */
/* GR Hello Delay Interval */
DECLARE_IF_PARAM(uint16_t, v_gr_hello_delay);
/* MTU mismatch check (see RFC2328, chap 10.6) */
DECLARE_IF_PARAM(uint8_t, mtu_ignore);
/* Fast-Hellos */
DECLARE_IF_PARAM(uint8_t, fast_hello);
/* Authentication data. */
uint8_t auth_simple[OSPF_AUTH_SIMPLE_SIZE + 1]; /* Simple password. */
uint8_t auth_simple__config : 1;
DECLARE_IF_PARAM(struct list *,
auth_crypt); /* List of Auth cryptographic data. */
DECLARE_IF_PARAM(int, auth_type); /* OSPF authentication type */
/* Other, non-configuration state */
uint32_t network_lsa_seqnum; /* Network LSA seqnum */
/* BFD configuration */
struct bfd_configuration {
/** BFD session detection multiplier. */
uint8_t detection_multiplier;
/** BFD session minimum required receive interval. */
uint32_t min_rx;
/** BFD session minimum required transmission interval. */
uint32_t min_tx;
/** BFD profile. */
char profile[BFD_PROFILE_NAME_LEN];
} *bfd_config;
/* MPLS LDP-IGP Sync configuration */
struct ldp_sync_info *ldp_sync_info;
/* point-to-point DMVPN configuration */
uint8_t ptp_dmvpn;
/* point-to-multipoint delayed reflooding configuration */
bool p2mp_delay_reflood;
};
enum { MEMBER_ALLROUTERS = 0,
MEMBER_DROUTERS,
MEMBER_MAX,
};
struct ospf_if_info {
struct ospf_if_params *def_params;
struct route_table *params;
struct route_table *oifs;
unsigned int
membership_counts[MEMBER_MAX]; /* multicast group refcnts */
uint32_t curr_mtu;
/* Per-interface write socket, configured via 'ospf' object */
int oii_fd;
};
struct ospf_interface;
struct ospf_vl_data {
struct in_addr vl_peer; /* Router-ID of the peer */
struct in_addr vl_area_id; /* Transit area */
int vl_area_id_fmt; /* Area ID format */
struct ospf_interface *vl_oi; /* Interface data structure */
struct vertex_nexthop nexthop; /* Nexthop router and oi to use */
struct in_addr peer_addr; /* Address used to reach the peer */
uint8_t flags;
};
#define OSPF_VL_MAX_COUNT 256
#define OSPF_VL_MTU 1500
#define OSPF_VL_FLAG_APPROVED 0x01
struct crypt_key {
uint8_t key_id;
uint8_t auth_key[OSPF_AUTH_MD5_SIZE + 1];
};
/* OSPF interface structure. */
struct ospf_interface {
/* This interface's parent ospf instance. */
struct ospf *ospf;
/* OSPF Area. */
struct ospf_area *area;
/* Position range in Router LSA */
uint16_t lsa_pos_beg; /* inclusive, >= */
uint16_t lsa_pos_end; /* exclusive, < */
/* Interface data from zebra. */
struct interface *ifp;
struct ospf_vl_data *vl_data; /* Data for Virtual Link */
/* Packet send buffer. */
struct ospf_fifo *obuf; /* Output queue */
/* OSPF Network Type. */
uint8_t type;
/* point-to-point DMVPN configuration */
uint8_t ptp_dmvpn;
/* point-to-multipoint delayed reflooding */
bool p2mp_delay_reflood;
/* State of Interface State Machine. */
uint8_t state;
/* To which multicast groups do we currently belong? */
uint8_t multicast_memberships;
#define OI_MEMBER_FLAG(M) (1 << (M))
#define OI_MEMBER_COUNT(O,M) (IF_OSPF_IF_INFO(oi->ifp)->membership_counts[(M)])
#define OI_MEMBER_CHECK(O, M) \
(CHECK_FLAG((O)->multicast_memberships, OI_MEMBER_FLAG(M)))
#define OI_MEMBER_JOINED(O, M) \
do { \
SET_FLAG((O)->multicast_memberships, OI_MEMBER_FLAG(M)); \
IF_OSPF_IF_INFO((O)->ifp)->membership_counts[(M)]++; \
} while (0)
#define OI_MEMBER_LEFT(O, M) \
do { \
UNSET_FLAG((O)->multicast_memberships, OI_MEMBER_FLAG(M)); \
IF_OSPF_IF_INFO((O)->ifp)->membership_counts[(M)]--; \
} while (0)
struct prefix *address; /* Interface prefix */
struct connected *connected; /* Pointer to connected */
/* Configured varables. */
struct ospf_if_params *params;
uint32_t crypt_seqnum; /* Cryptographic Sequence Number */
uint32_t output_cost; /* Acutual Interface Output Cost */
/* Neighbor information. */
struct route_table *nbrs; /* OSPF Neighbor List */
struct ospf_neighbor *nbr_self; /* Neighbor Self */
#define DR(I) ((I)->nbr_self->d_router)
#define BDR(I) ((I)->nbr_self->bd_router)
#define OPTIONS(I) ((I)->nbr_self->options)
#define PRIORITY(I) ((I)->nbr_self->priority)
/* List of configured NBMA neighbor. */
struct list *nbr_nbma;
/* Graceful-Restart data. */
struct {
struct {
uint16_t elapsed_seconds;
struct event *t_grace_send;
} hello_delay;
} gr;
/* self-originated LSAs. */
struct ospf_lsa *network_lsa_self; /* network-LSA. */
struct list *opaque_lsa_self; /* Type-9 Opaque-LSAs */
struct route_table *ls_upd_queue;
struct list *ls_ack; /* Link State Acknowledgment list. */
struct {
struct list *ls_ack;
struct in_addr dst;
} ls_ack_direct;
/* Timer values. */
uint32_t v_ls_ack; /* Delayed Link State Acknowledgment */
/* Threads. */
struct event *t_hello; /* timer */
struct event *t_wait; /* timer */
struct event *t_ls_ack; /* timer */
struct event *t_ls_ack_direct; /* event */
struct event *t_ls_upd_event; /* event */
struct event *t_opaque_lsa_self; /* Type-9 Opaque-LSAs */
int on_write_q;
/* Statistics fields. */
uint32_t hello_in; /* Hello message input count. */
uint32_t hello_out; /* Hello message output count. */
uint32_t db_desc_in; /* database desc. message input count. */
uint32_t db_desc_out; /* database desc. message output count. */
uint32_t ls_req_in; /* LS request message input count. */
uint32_t ls_req_out; /* LS request message output count. */
uint32_t ls_upd_in; /* LS update message input count. */
uint32_t ls_upd_out; /* LS update message output count. */
uint32_t ls_ack_in; /* LS Ack message input count. */
uint32_t ls_ack_out; /* LS Ack message output count. */
uint32_t discarded; /* discarded input count by error. */
uint32_t state_change; /* Number of status change. */
uint32_t full_nbrs;
QOBJ_FIELDS;
};
DECLARE_QOBJ_TYPE(ospf_interface);
/* Prototypes. */
extern char *ospf_if_name(struct ospf_interface *oi);
extern struct ospf_interface *
ospf_if_new(struct ospf *ospf, struct interface *ifp, struct prefix *p);
extern void ospf_if_cleanup(struct ospf_interface *oi);
extern void ospf_if_free(struct ospf_interface *oi);
extern int ospf_if_up(struct ospf_interface *oi);
extern int ospf_if_down(struct ospf_interface *oi);
extern int ospf_if_is_up(struct ospf_interface *oi);
extern struct ospf_interface *ospf_if_exists(struct ospf_interface *oi);
extern struct ospf_interface *ospf_if_lookup_by_lsa_pos(struct ospf_area *area,
int lsa_pos);
extern struct ospf_interface *
ospf_if_lookup_by_local_addr(struct ospf *ospf, struct interface *ifp,
struct in_addr addr);
extern struct ospf_interface *ospf_if_lookup_by_prefix(struct ospf *ospf,
struct prefix_ipv4 *p);
extern struct ospf_interface *ospf_if_table_lookup(struct interface *ifp,
struct prefix *p);
extern struct ospf_interface *ospf_if_addr_local(struct in_addr addr);
extern struct ospf_interface *ospf_if_lookup_recv_if(struct ospf *ospf,
struct in_addr addr,
struct interface *ifp);
extern struct ospf_interface *ospf_if_is_configured(struct ospf *ospf,
struct in_addr *addr);
extern struct ospf_if_params *ospf_lookup_if_params(struct interface *ifp,
struct in_addr addr);
extern struct ospf_if_params *ospf_get_if_params(struct interface *ifp,
struct in_addr addr);
extern void ospf_free_if_params(struct interface *ifp, struct in_addr addr);
extern void ospf_if_update_params(struct interface *ifp, struct in_addr addr);
extern int ospf_if_new_hook(struct interface *ifp);
extern void ospf_if_init(void);
extern void ospf_if_stream_unset(struct ospf_interface *oi);
extern void ospf_if_reset_variables(struct ospf_interface *oi);
extern int ospf_if_is_enable(struct ospf_interface *oi);
extern int ospf_if_get_output_cost(struct ospf_interface *oi);
extern void ospf_if_recalculate_output_cost(struct interface *ifp);
/* Simulate down/up on the interface. */
extern void ospf_if_reset(struct interface *ifp);
extern struct ospf_interface *ospf_vl_new(struct ospf *ospf,
struct ospf_vl_data *vl_data);
extern struct ospf_vl_data *ospf_vl_data_new(struct ospf_area *area,
struct in_addr addr);
extern struct ospf_vl_data *
ospf_vl_lookup(struct ospf *ospf, struct ospf_area *area, struct in_addr addr);
extern int ospf_vl_count(struct ospf *ospf, struct ospf_area *area);
extern void ospf_vl_data_free(struct ospf_vl_data *vl_data);
extern void ospf_vl_add(struct ospf *ospf, struct ospf_vl_data *vl_data);
extern void ospf_vl_delete(struct ospf *ospf, struct ospf_vl_data *vl_data);
extern void ospf_vl_up_check(struct ospf_area *area, struct in_addr addr,
struct vertex *vertex);
extern void ospf_vl_unapprove(struct ospf *ospf);
extern void ospf_vl_shut_unapproved(struct ospf *ospf);
extern int ospf_full_virtual_nbrs(struct ospf_area *area);
extern int ospf_vls_in_area(struct ospf_area *area);
extern struct crypt_key *ospf_crypt_key_lookup(struct list *list,
uint8_t key_id);
extern struct crypt_key *ospf_crypt_key_new(void);
extern void ospf_crypt_key_add(struct list *list, struct crypt_key *key);
extern int ospf_crypt_key_delete(struct list *list, uint8_t key_id);
extern uint8_t ospf_default_iftype(struct interface *ifp);
extern int ospf_interface_neighbor_count(struct ospf_interface *oi);
/* Set all multicast memberships appropriately based on the type and
state of the interface. */
extern void ospf_if_set_multicast(struct ospf_interface *oi);
extern void ospf_if_interface(struct interface *ifp);
extern uint32_t ospf_if_count_area_params(struct interface *ifp);
extern void ospf_reset_hello_timer(struct interface *ifp, struct in_addr addr,
bool is_addr);
extern void ospf_interface_fifo_flush(struct ospf_interface *oi);
DECLARE_HOOK(ospf_vl_add, (struct ospf_vl_data * vd), (vd));
DECLARE_HOOK(ospf_vl_delete, (struct ospf_vl_data * vd), (vd));
DECLARE_HOOK(ospf_if_update, (struct interface * ifp), (ifp));
DECLARE_HOOK(ospf_if_delete, (struct interface * ifp), (ifp));
#endif /* _ZEBRA_OSPF_INTERFACE_H */
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