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/*
* OSPF Interface functions.
* Copyright (C) 1999 Toshiaki Takada
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation; either version 2, or (at your
* option) any later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Zebra; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef _ZEBRA_OSPF_INTERFACE_H
#define _ZEBRA_OSPF_INTERFACE_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; u_char 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 (u_int32_t, transmit_delay); /* Interface Transmisson Delay */
DECLARE_IF_PARAM (u_int32_t, output_cost_cmd);/* Command Interface Output Cost */
DECLARE_IF_PARAM (u_int32_t, retransmit_interval); /* Retransmission Interval */
DECLARE_IF_PARAM (u_char, passive_interface); /* OSPF Interface is passive: no sending or receiving (no need to join multicast groups) */
DECLARE_IF_PARAM (u_char, priority); /* OSPF Interface priority */
DECLARE_IF_PARAM (struct in_addr, if_area); /* Enable OSPF on this interface with area if_area */
DECLARE_IF_PARAM (u_char, 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 (u_int32_t, v_hello); /* Hello Interval */
DECLARE_IF_PARAM (u_int32_t, v_wait); /* Router Dead Interval */
/* MTU mismatch check (see RFC2328, chap 10.6) */
DECLARE_IF_PARAM (u_char, mtu_ignore);
/* Fast-Hellos */
DECLARE_IF_PARAM (u_char, fast_hello);
/* Authentication data. */
u_char auth_simple[OSPF_AUTH_SIMPLE_SIZE + 1]; /* Simple password. */
u_char 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 */
u_int32_t network_lsa_seqnum; /* Network LSA seqnum */
};
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 */
};
struct ospf_interface;
struct ospf_vl_data
{
struct in_addr vl_peer; /* Router-ID of the peer for VLs. */
struct in_addr vl_area_id; /* Transit area for this VL. */
int format; /* area ID format */
struct ospf_interface *vl_oi; /* Interface data structure for the VL. */
struct vertex_nexthop nexthop; /* Nexthop router and oi to use */
struct in_addr peer_addr; /* Address used to reach the peer. */
u_char flags;
};
#define OSPF_VL_MAX_COUNT 256
#define OSPF_VL_MTU 1500
#define OSPF_VL_FLAG_APPROVED 0x01
struct crypt_key
{
u_char key_id;
u_char 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. */
u_char type;
/* State of Interface State Machine. */
u_char state;
/* To which multicast groups do we currently belong? */
u_char 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;
u_int32_t crypt_seqnum; /* Cryptographic Sequence Number */
u_int32_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;
/* self-originated LSAs. */
struct ospf_lsa *network_lsa_self; /* network-LSA. */
#ifdef HAVE_OPAQUE_LSA
struct list *opaque_lsa_self; /* Type-9 Opaque-LSAs */
#endif /* HAVE_OPAQUE_LSA */
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. */
u_int32_t v_ls_ack; /* Delayed Link State Acknowledgment */
/* Threads. */
struct thread *t_hello; /* timer */
struct thread *t_wait; /* timer */
struct thread *t_ls_ack; /* timer */
struct thread *t_ls_ack_direct; /* event */
struct thread *t_ls_upd_event; /* event */
#ifdef HAVE_OPAQUE_LSA
struct thread *t_opaque_lsa_self; /* Type-9 Opaque-LSAs */
#endif /* HAVE_OPAQUE_LSA */
int on_write_q;
/* Statistics fields. */
u_int32_t hello_in; /* Hello message input count. */
u_int32_t hello_out; /* Hello message output count. */
u_int32_t db_desc_in; /* database desc. message input count. */
u_int32_t db_desc_out; /* database desc. message output count. */
u_int32_t ls_req_in; /* LS request message input count. */
u_int32_t ls_req_out; /* LS request message output count. */
u_int32_t ls_upd_in; /* LS update message input count. */
u_int32_t ls_upd_out; /* LS update message output count. */
u_int32_t ls_ack_in; /* LS Ack message input count. */
u_int32_t ls_ack_out; /* LS Ack message output count. */
u_int32_t discarded; /* discarded input count by error. */
u_int32_t state_change; /* Number of status change. */
u_int32_t full_nbrs;
};
/* Prototypes. */
extern char *ospf_if_name (struct ospf_interface *);
extern struct ospf_interface *ospf_if_new (struct ospf *, struct interface *,
struct prefix *);
extern void ospf_if_cleanup (struct ospf_interface *);
extern void ospf_if_free (struct ospf_interface *);
extern int ospf_if_up (struct ospf_interface *);
extern int ospf_if_down (struct ospf_interface *);
extern int ospf_if_is_up (struct ospf_interface *);
extern struct ospf_interface *ospf_if_exists (struct ospf_interface *);
extern struct ospf_interface *ospf_if_lookup_by_lsa_pos (struct ospf_area *,
int);
extern struct ospf_interface *ospf_if_lookup_by_local_addr (struct ospf *,
struct interface
*,
struct in_addr);
extern struct ospf_interface *ospf_if_lookup_by_prefix (struct ospf *,
struct prefix_ipv4 *);
extern struct ospf_interface *ospf_if_table_lookup (struct interface *,
struct prefix *);
extern struct ospf_interface *ospf_if_addr_local (struct in_addr);
extern struct ospf_interface *ospf_if_lookup_recv_if (struct ospf *,
struct in_addr,
struct interface *);
extern struct ospf_interface *ospf_if_is_configured (struct ospf *,
struct in_addr *);
extern struct ospf_if_params *ospf_lookup_if_params (struct interface *,
struct in_addr);
extern struct ospf_if_params *ospf_get_if_params (struct interface *,
struct in_addr);
extern void ospf_del_if_params (struct ospf_if_params *);
extern void ospf_free_if_params (struct interface *, struct in_addr);
extern void ospf_if_update_params (struct interface *, struct in_addr);
extern int ospf_if_new_hook (struct interface *);
extern void ospf_if_init (void);
extern void ospf_if_stream_set (struct ospf_interface *);
extern void ospf_if_stream_unset (struct ospf_interface *);
extern void ospf_if_reset_variables (struct ospf_interface *);
extern int ospf_if_is_enable (struct ospf_interface *);
extern int ospf_if_get_output_cost (struct ospf_interface *);
extern void ospf_if_recalculate_output_cost (struct interface *);
/* Simulate down/up on the interface. */
extern void ospf_if_reset (struct interface *);
extern struct ospf_interface *ospf_vl_new (struct ospf *,
struct ospf_vl_data *);
extern struct ospf_vl_data *ospf_vl_data_new (struct ospf_area *,
struct in_addr);
extern struct ospf_vl_data *ospf_vl_lookup (struct ospf *, struct ospf_area *,
struct in_addr);
extern void ospf_vl_data_free (struct ospf_vl_data *);
extern void ospf_vl_add (struct ospf *, struct ospf_vl_data *);
extern void ospf_vl_delete (struct ospf *, struct ospf_vl_data *);
extern void ospf_vl_up_check (struct ospf_area *, struct in_addr,
struct vertex *);
extern void ospf_vl_unapprove (struct ospf *);
extern void ospf_vl_shut_unapproved (struct ospf *);
extern int ospf_full_virtual_nbrs (struct ospf_area *);
extern int ospf_vls_in_area (struct ospf_area *);
extern struct crypt_key *ospf_crypt_key_lookup (struct list *, u_char);
extern struct crypt_key *ospf_crypt_key_new (void);
extern void ospf_crypt_key_add (struct list *, struct crypt_key *);
extern int ospf_crypt_key_delete (struct list *, u_char);
extern u_char ospf_default_iftype (struct interface *ifp);
/* Set all multicast memberships appropriately based on the type and
state of the interface. */
extern void ospf_if_set_multicast (struct ospf_interface *);
#endif /* _ZEBRA_OSPF_INTERFACE_H */
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