ospf_lsa.h
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- /*
- * OSPF Link State Advertisement
- * Copyright (C) 1999, 2000 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_LSA_H
- #define _ZEBRA_OSPF_LSA_H
- /* OSPF LSA Range definition. */
- #define OSPF_MIN_LSA 1 /* begin range here */
- #if defined (HAVE_OPAQUE_LSA)
- #define OSPF_MAX_LSA 12
- #elif defined (HAVE_NSSA)
- #define OSPF_MAX_LSA 8
- #else
- #define OSPF_MAX_LSA 6
- #endif
- /* OSPF LSA Type definition. */
- #define OSPF_UNKNOWN_LSA 0
- #define OSPF_ROUTER_LSA 1
- #define OSPF_NETWORK_LSA 2
- #define OSPF_SUMMARY_LSA 3
- #define OSPF_ASBR_SUMMARY_LSA 4
- #define OSPF_AS_EXTERNAL_LSA 5
- #define OSPF_GROUP_MEMBER_LSA 6 /* Not supported. */
- #define OSPF_AS_NSSA_LSA 7
- #define OSPF_EXTERNAL_ATTRIBUTES_LSA 8 /* Not supported. */
- #define OSPF_OPAQUE_LINK_LSA 9
- #define OSPF_OPAQUE_AREA_LSA 10
- #define OSPF_OPAQUE_AS_LSA 11
- #define OSPF_LSA_HEADER_SIZE 20
- #define OSPF_MAX_LSA_SIZE 1500
- /* AS-external-LSA refresh method. */
- #define LSA_REFRESH_IF_CHANGED 0
- #define LSA_REFRESH_FORCE 1
- /* OSPF LSA header. */
- struct lsa_header
- {
- u_int16_t ls_age;
- u_char options;
- u_char type;
- struct in_addr id;
- struct in_addr adv_router;
- int ls_seqnum;
- u_int16_t checksum;
- u_int16_t length;
- };
- /* OSPF LSA. */
- struct ospf_lsa
- {
- /* LSA origination flag. */
- u_char flags;
- #define OSPF_LSA_SELF 0x01
- #define OSPF_LSA_SELF_CHECKED 0x02
- #define OSPF_LSA_RECEIVED 0x04
- #define OSPF_LSA_APPROVED 0x08
- #define OSPF_LSA_DISCARD 0x10
- #ifdef HAVE_NSSA
- #define OSPF_LSA_LOCAL_XLT 0x20
- #endif /* HAVE_NSSA */
- /* LSA data. */
- struct lsa_header *data;
- /* Received time stamp. */
- struct timeval tv_recv;
- /* Last time it was originated */
- struct timeval tv_orig;
- /* All of reference count, also lock to remove. */
- int lock;
- /* References to this LSA in neighbor retransmission lists*/
- int retransmit_counter;
- /* Area the LSA belongs to, may be NULL if AS-external-LSA. */
- struct ospf_area *area;
- /* Parent LSDB. */
- struct ospf_lsdb *lsdb;
- /* Related Route. */
- void *route;
- /* Refreshement List or Queue */
- int refresh_list;
- #ifdef HAVE_OPAQUE_LSA
- /* For Type-9 Opaque-LSAs, reference to ospf-interface is required. */
- struct ospf_interface *oi;
- #endif /* HAVE_OPAQUE_LSA */
- };
- /* OSPF LSA Link Type. */
- #define LSA_LINK_TYPE_POINTOPOINT 1
- #define LSA_LINK_TYPE_TRANSIT 2
- #define LSA_LINK_TYPE_STUB 3
- #define LSA_LINK_TYPE_VIRTUALLINK 4
- /* OSPF Router LSA Flag. */
- #define ROUTER_LSA_BORDER 0x01 /* The router is an ABR */
- #define ROUTER_LSA_EXTERNAL 0x02 /* The router is an ASBR */
- #define ROUTER_LSA_VIRTUAL 0x04 /* The router has a VL in this area */
- #define ROUTER_LSA_NT 0x10 /* NSSA-specific flag */
- #define ROUTER_LSA_SHORTCUT 0x20 /* Shortcut-ABR specific flag */
- #define IS_ROUTER_LSA_VIRTUAL(x) ((x)->flags & ROUTER_LSA_VIRTUAL)
- #define IS_ROUTER_LSA_EXTERNAL(x) ((x)->flags & ROUTER_LSA_EXTERNAL)
- #define IS_ROUTER_LSA_BORDER(x) ((x)->flags & ROUTER_LSA_BORDER)
- #define IS_ROUTER_LSA_SHORTCUT(x) ((x)->flags & ROUTER_LSA_SHORTCUT)
- /* OSPF Router-LSA Link information. */
- struct router_lsa_link
- {
- struct in_addr link_id;
- struct in_addr link_data;
- struct
- {
- u_char type;
- u_char tos_count;
- u_int16_t metric;
- } m[1];
- };
- /* OSPF Router-LSAs structure. */
- struct router_lsa
- {
- struct lsa_header header;
- u_char flags;
- u_char zero;
- u_int16_t links;
- struct
- {
- struct in_addr link_id;
- struct in_addr link_data;
- u_char type;
- u_char tos;
- u_int16_t metric;
- } link[1];
- };
- /* OSPF Network-LSAs structure. */
- struct network_lsa
- {
- struct lsa_header header;
- struct in_addr mask;
- struct in_addr routers[1];
- };
- /* OSPF Summary-LSAs structure. */
- struct summary_lsa
- {
- struct lsa_header header;
- struct in_addr mask;
- u_char tos;
- u_char metric[3];
- };
- /* OSPF AS-external-LSAs structure. */
- struct as_external_lsa
- {
- struct lsa_header header;
- struct in_addr mask;
- struct
- {
- u_char tos;
- u_char metric[3];
- struct in_addr fwd_addr;
- u_int32_t route_tag;
- } e[1];
- };
- #ifdef HAVE_OPAQUE_LSA
- #include "ospfd/ospf_opaque.h"
- #endif /* HAVE_OPAQUE_LSA */
- /* Macros. */
- #define GET_METRIC(x) get_metric(x)
- #define IS_EXTERNAL_METRIC(x) ((x) & 0x80)
- #define GET_AGE(x) (ntohs ((x)->data->ls_age) + time (NULL) - (x)->tv_recv)
- #define LS_AGE(x) (OSPF_LSA_MAXAGE < get_age(x) ?
- OSPF_LSA_MAXAGE : get_age(x))
- #define IS_LSA_SELF(L) (CHECK_FLAG ((L)->flags, OSPF_LSA_SELF))
- #define IS_LSA_MAXAGE(L) (LS_AGE ((L)) == OSPF_LSA_MAXAGE)
- #define OSPF_LSA_UPDATE_DELAY 2
- #define OSPF_LSA_UPDATE_TIMER_ON(T,F)
- if (!(T))
- (T) = thread_add_timer (master, (F), 0, 2)
- struct ospf_route;
- struct ospf_lsdb;
- /* Prototypes. */
- struct timeval tv_adjust (struct timeval);
- int tv_ceil (struct timeval);
- int tv_floor (struct timeval);
- struct timeval int2tv (int);
- struct timeval tv_add (struct timeval, struct timeval);
- struct timeval tv_sub (struct timeval, struct timeval);
- int tv_cmp (struct timeval, struct timeval);
- int get_age (struct ospf_lsa *);
- u_int16_t ospf_lsa_checksum (struct lsa_header *);
- struct stream;
- const char *dump_lsa_key (struct ospf_lsa *);
- u_int32_t lsa_seqnum_increment (struct ospf_lsa *);
- void lsa_header_set (struct stream *, u_char, u_char, struct in_addr,
- struct in_addr);
- struct ospf_neighbor *ospf_nbr_lookup_ptop (struct ospf_interface *);
- /* Prototype for LSA primitive. */
- struct ospf_lsa *ospf_lsa_new ();
- struct ospf_lsa *ospf_lsa_dup ();
- void ospf_lsa_free (struct ospf_lsa *);
- struct ospf_lsa *ospf_lsa_lock (struct ospf_lsa *);
- void ospf_lsa_unlock (struct ospf_lsa *);
- void ospf_lsa_discard (struct ospf_lsa *);
- struct lsa_header *ospf_lsa_data_new (size_t);
- struct lsa_header *ospf_lsa_data_dup (struct lsa_header *);
- void ospf_lsa_data_free (struct lsa_header *);
- /* Prototype for various LSAs */
- struct ospf_lsa *ospf_router_lsa_originate (struct ospf_area *);
- int ospf_router_lsa_update_timer (struct thread *);
- void ospf_router_lsa_timer_add (struct ospf_area *);
- int ospf_network_lsa_refresh (struct ospf_lsa *, struct ospf_interface *);
- void ospf_network_lsa_timer_add (struct ospf_interface *);
- struct ospf_lsa *ospf_summary_lsa_originate (struct prefix_ipv4 *, u_int32_t,
- struct ospf_area *);
- struct ospf_lsa *ospf_summary_asbr_lsa_originate (struct prefix_ipv4 *,
- u_int32_t,
- struct ospf_area *);
- struct ospf_lsa *ospf_summary_lsa_refresh (struct ospf *, struct ospf_lsa *);
- struct ospf_lsa *ospf_summary_asbr_lsa_refresh (struct ospf *, struct ospf_lsa *);
- struct ospf_lsa *ospf_lsa_install (struct ospf *,
- struct ospf_interface *, struct ospf_lsa *);
- void ospf_nssa_lsa_flush (struct ospf *ospf, struct prefix_ipv4 *p);
- void ospf_external_lsa_flush (struct ospf *, u_char, struct prefix_ipv4 *,
- unsigned int, struct in_addr);
- struct in_addr ospf_get_ip_from_ifp (struct ospf_interface *);
- struct ospf_lsa *ospf_external_lsa_originate (struct ospf *, struct external_info *);
- int ospf_external_lsa_originate_timer (struct thread *);
- struct ospf_lsa *ospf_lsa_lookup (struct ospf_area *, u_int32_t,
- struct in_addr, struct in_addr);
- struct ospf_lsa *ospf_lsa_lookup_by_id (struct ospf_area *,u_int32_t, struct in_addr);
- struct ospf_lsa *ospf_lsa_lookup_by_header (struct ospf_area *,
- struct lsa_header *);
- int ospf_lsa_more_recent (struct ospf_lsa *, struct ospf_lsa *);
- int ospf_lsa_different (struct ospf_lsa *, struct ospf_lsa *);
- void ospf_flush_self_originated_lsas_now (struct ospf *);
- int ospf_lsa_is_self_originated (struct ospf *, struct ospf_lsa *);
- struct ospf_lsa *ospf_lsa_lookup_by_prefix (struct ospf_lsdb *, u_char,
- struct prefix_ipv4 *,
- struct in_addr);
- void ospf_lsa_maxage (struct ospf *, struct ospf_lsa *);
- u_int32_t get_metric (u_char *);
- int ospf_lsa_maxage_walker (struct thread *);
- void ospf_external_lsa_refresh_default (struct ospf *);
- void ospf_external_lsa_refresh_type (struct ospf *, u_char, int);
- void ospf_external_lsa_refresh (struct ospf *, struct ospf_lsa *,
- struct external_info *, int);
- struct in_addr ospf_lsa_unique_id (struct ospf *, struct ospf_lsdb *, u_char,
- struct prefix_ipv4 *);
- void ospf_schedule_lsa_flood_area (struct ospf_area *, struct ospf_lsa *);
- void ospf_schedule_lsa_flush_area (struct ospf_area *, struct ospf_lsa *);
- void ospf_refresher_register_lsa (struct ospf *, struct ospf_lsa *);
- void ospf_refresher_unregister_lsa (struct ospf *, struct ospf_lsa *);
- int ospf_lsa_refresh_walker (struct thread *);
- void ospf_lsa_maxage_delete (struct ospf *, struct ospf_lsa *);
- void ospf_discard_from_db (struct ospf *, struct ospf_lsdb *, struct ospf_lsa*);
- int is_prefix_default (struct prefix_ipv4 *);
- int metric_type (struct ospf *, u_char);
- int metric_value (struct ospf *, u_char);
- #ifdef HAVE_NSSA
- struct in_addr ospf_get_nssa_ip (struct ospf_area *);
- #endif /* HAVE NSSA */
- #endif /* _ZEBRA_OSPF_LSA_H */