[mirror_frr.git] / ospfd / ospf_lsa.h

/*
 * 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 this program; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef _ZEBRA_OSPF_LSA_H
#define _ZEBRA_OSPF_LSA_H

#include "stream.h"

/* OSPF LSA Default metric values */
#define DEFAULT_DEFAULT_METRIC 20
#define DEFAULT_DEFAULT_ORIGINATE_METRIC 10
#define DEFAULT_DEFAULT_ALWAYS_METRIC 1
#define DEFAULT_METRIC_TYPE EXTERNAL_METRIC_TYPE_2

/* OSPF LSA Range definition. */
#define OSPF_MIN_LSA		1  /* begin range here */
#define OSPF_MAX_LSA           12

/* 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	     20U
#define OSPF_ROUTER_LSA_LINK_SIZE    12U
#define OSPF_ROUTER_LSA_TOS_SIZE      4U
#define OSPF_MAX_LSA_SIZE	   1500U

/* AS-external-LSA refresh method. */
#define LSA_REFRESH_IF_CHANGED	0
#define LSA_REFRESH_FORCE	1

/* OSPF LSA header. */
struct lsa_header {
	uint16_t ls_age;
	uint8_t options;
	uint8_t type;
	struct in_addr id;
	struct in_addr adv_router;
	uint32_t ls_seqnum;
	uint16_t checksum;
	uint16_t length;
};

/* OSPF LSA. */
struct ospf_lsa {
	/* LSA origination flag. */
	uint8_t 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
#define OSPF_LSA_LOCAL_XLT	  0x20
#define OSPF_LSA_PREMATURE_AGE	  0x40
#define OSPF_LSA_IN_MAXAGE	  0x80

	/* 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;

	/* Flags for the SPF calculation. */
	int stat;
#define LSA_SPF_NOT_EXPLORED -1
#define LSA_SPF_IN_SPFTREE -2
	/* If stat >= 0, stat is LSA position in candidates heap. */

	/* 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;

	/* For Type-9 Opaque-LSAs */
	struct ospf_interface *oi;

	/* VRF Id */
	vrf_id_t vrf_id;
};

/* 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 /* The routers always translates Type-7 */
#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)
#define IS_ROUTER_LSA_NT(x)            ((x)->flags & ROUTER_LSA_NT)

/* OSPF Router-LSA Link information. */
struct router_lsa_link {
	struct in_addr link_id;
	struct in_addr link_data;
	struct {
		uint8_t type;
		uint8_t tos_count;
		uint16_t metric;
	} m[1];
};

/* OSPF Router-LSAs structure. */
#define OSPF_ROUTER_LSA_MIN_SIZE                   4U /* w/0 link descriptors */
/* There is an edge case, when number of links in a Router-LSA may be 0 without
   breaking the specification. A router, which has no other links to backbone
   area besides one virtual link, will not put any VL descriptor blocks into
   the Router-LSA generated for area 0 until a full adjacency over the VL is
   reached (RFC2328 12.4.1.3). In this case the Router-LSA initially received
   by the other end of the VL will have 0 link descriptor blocks, but soon will
   be replaced with the next revision having 1 descriptor block. */
struct router_lsa {
	struct lsa_header header;
	uint8_t flags;
	uint8_t zero;
	uint16_t links;
	struct {
		struct in_addr link_id;
		struct in_addr link_data;
		uint8_t type;
		uint8_t tos;
		uint16_t metric;
	} link[1];
};

/* OSPF Network-LSAs structure. */
#define OSPF_NETWORK_LSA_MIN_SIZE                  8U /* w/1 router-ID */
struct network_lsa {
	struct lsa_header header;
	struct in_addr mask;
	struct in_addr routers[1];
};

/* OSPF Summary-LSAs structure. */
#define OSPF_SUMMARY_LSA_MIN_SIZE                  8U /* w/1 TOS metric block */
struct summary_lsa {
	struct lsa_header header;
	struct in_addr mask;
	uint8_t tos;
	uint8_t metric[3];
};

/* OSPF AS-external-LSAs structure. */
#define OSPF_AS_EXTERNAL_LSA_MIN_SIZE             16U /* w/1 TOS forwarding block */
struct as_external_lsa {
	struct lsa_header header;
	struct in_addr mask;
	struct {
		uint8_t tos;
		uint8_t metric[3];
		struct in_addr fwd_addr;
		uint32_t route_tag;
	} e[1];
};

#include "ospfd/ospf_opaque.h"

/* 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)

/* Prototypes. */
/* XXX: Eek, time functions, similar are in lib/thread.c */
extern struct timeval int2tv(int);
extern struct timeval msec2tv(int);

extern int get_age(struct ospf_lsa *);
extern uint16_t ospf_lsa_checksum(struct lsa_header *);
extern int ospf_lsa_checksum_valid(struct lsa_header *);
extern int ospf_lsa_refresh_delay(struct ospf_lsa *);

extern const char *dump_lsa_key(struct ospf_lsa *);
extern uint32_t lsa_seqnum_increment(struct ospf_lsa *);
extern void lsa_header_set(struct stream *, uint8_t, uint8_t, struct in_addr,
			   struct in_addr);
extern struct ospf_neighbor *ospf_nbr_lookup_ptop(struct ospf_interface *);
extern int ospf_check_nbr_status(struct ospf *);

/* Prototype for LSA primitive. */
extern struct ospf_lsa *ospf_lsa_new(void);
extern struct ospf_lsa *ospf_lsa_new_and_data(size_t size);
extern struct ospf_lsa *ospf_lsa_dup(struct ospf_lsa *);
extern void ospf_lsa_free(struct ospf_lsa *);
extern struct ospf_lsa *ospf_lsa_lock(struct ospf_lsa *);
extern void ospf_lsa_unlock(struct ospf_lsa **);
extern void ospf_lsa_discard(struct ospf_lsa *);
extern int ospf_lsa_flush_schedule(struct ospf *, struct ospf_lsa *);
extern struct lsa_header *ospf_lsa_data_new(size_t);
extern struct lsa_header *ospf_lsa_data_dup(struct lsa_header *);
extern void ospf_lsa_data_free(struct lsa_header *);

/* Prototype for various LSAs */
extern int ospf_router_lsa_update(struct ospf *);
extern int ospf_router_lsa_update_area(struct ospf_area *);

extern void ospf_network_lsa_update(struct ospf_interface *);

extern struct ospf_lsa *
ospf_summary_lsa_originate(struct prefix_ipv4 *, uint32_t, struct ospf_area *);
extern struct ospf_lsa *ospf_summary_asbr_lsa_originate(struct prefix_ipv4 *,
							uint32_t,
							struct ospf_area *);

extern struct ospf_lsa *ospf_lsa_install(struct ospf *, struct ospf_interface *,
					 struct ospf_lsa *);

extern void ospf_nssa_lsa_flush(struct ospf *ospf, struct prefix_ipv4 *p);
extern void ospf_external_lsa_flush(struct ospf *, uint8_t,
				    struct prefix_ipv4 *,
				    ifindex_t /* , struct in_addr nexthop */);

extern struct in_addr ospf_get_ip_from_ifp(struct ospf_interface *);

extern struct ospf_lsa *ospf_external_lsa_originate(struct ospf *,
						    struct external_info *);
extern int ospf_external_lsa_originate_timer(struct thread *);
extern int ospf_default_originate_timer(struct thread *);
extern struct ospf_lsa *ospf_lsa_lookup(struct ospf *ospf, struct ospf_area *,
					uint32_t, struct in_addr,
					struct in_addr);
extern struct ospf_lsa *ospf_lsa_lookup_by_id(struct ospf_area *, uint32_t,
					      struct in_addr);
extern struct ospf_lsa *ospf_lsa_lookup_by_header(struct ospf_area *,
						  struct lsa_header *);
extern int ospf_lsa_more_recent(struct ospf_lsa *, struct ospf_lsa *);
extern int ospf_lsa_different(struct ospf_lsa *, struct ospf_lsa *);
extern void ospf_flush_self_originated_lsas_now(struct ospf *);

extern int ospf_lsa_is_self_originated(struct ospf *, struct ospf_lsa *);

extern struct ospf_lsa *ospf_lsa_lookup_by_prefix(struct ospf_lsdb *, uint8_t,
						  struct prefix_ipv4 *,
						  struct in_addr);

extern void ospf_lsa_maxage(struct ospf *, struct ospf_lsa *);
extern uint32_t get_metric(uint8_t *);

extern int ospf_lsa_maxage_walker(struct thread *);
extern struct ospf_lsa *ospf_lsa_refresh(struct ospf *, struct ospf_lsa *);

extern void ospf_external_lsa_refresh_default(struct ospf *);
extern void ospf_default_originate_lsa_update(struct ospf *ospf);

extern void ospf_external_lsa_refresh_type(struct ospf *, uint8_t,
					   unsigned short, int);
extern struct ospf_lsa *ospf_external_lsa_refresh(struct ospf *,
						  struct ospf_lsa *,
						  struct external_info *, int);
extern struct in_addr ospf_lsa_unique_id(struct ospf *, struct ospf_lsdb *,
					 uint8_t, struct prefix_ipv4 *);
extern void ospf_schedule_lsa_flood_area(struct ospf_area *, struct ospf_lsa *);
extern void ospf_schedule_lsa_flush_area(struct ospf_area *, struct ospf_lsa *);

extern void ospf_refresher_register_lsa(struct ospf *, struct ospf_lsa *);
extern void ospf_refresher_unregister_lsa(struct ospf *, struct ospf_lsa *);
extern int ospf_lsa_refresh_walker(struct thread *);

extern void ospf_lsa_maxage_delete(struct ospf *, struct ospf_lsa *);

extern void ospf_discard_from_db(struct ospf *, struct ospf_lsdb *,
				 struct ospf_lsa *);
extern int is_prefix_default(struct prefix_ipv4 *);

extern int metric_type(struct ospf *, uint8_t, unsigned short);
extern int metric_value(struct ospf *, uint8_t, unsigned short);

extern struct in_addr ospf_get_nssa_ip(struct ospf_area *);
extern int ospf_translated_nssa_compare(struct ospf_lsa *, struct ospf_lsa *);
extern struct ospf_lsa *ospf_translated_nssa_refresh(struct ospf *,
						     struct ospf_lsa *,
						     struct ospf_lsa *);
extern struct ospf_lsa *ospf_translated_nssa_originate(struct ospf *,
						       struct ospf_lsa *);

#endif /* _ZEBRA_OSPF_LSA_H */
Commit	Line	Data
718e3744	1	/*
	2	* OSPF Link State Advertisement
	3	* Copyright (C) 1999, 2000 Toshiaki Takada
	4	*
	5	* This file is part of GNU Zebra.
	6	*
	7	* GNU Zebra is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2, or (at your option) any
	10	* later version.
	11	*
	12	* GNU Zebra is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
896014f4 DL	17	* You should have received a copy of the GNU General Public License along
	18	* with this program; see the file COPYING; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
718e3744	20	*/
	21
	22	#ifndef _ZEBRA_OSPF_LSA_H
	23	#define _ZEBRA_OSPF_LSA_H
	24
4dadc291	25	#include "stream.h"
4dadc291	26
236e900c QY	27	/* OSPF LSA Default metric values */
	28	#define DEFAULT_DEFAULT_METRIC 20
	29	#define DEFAULT_DEFAULT_ORIGINATE_METRIC 10
	30	#define DEFAULT_DEFAULT_ALWAYS_METRIC 1
	31	#define DEFAULT_METRIC_TYPE EXTERNAL_METRIC_TYPE_2
	32
718e3744	33	/* OSPF LSA Range definition. */
718e3744	34	#define OSPF_MIN_LSA 1 /* begin range here */
718e3744	35	#define OSPF_MAX_LSA 12
718e3744	36
	37	/* OSPF LSA Type definition. */
	38	#define OSPF_UNKNOWN_LSA 0
	39	#define OSPF_ROUTER_LSA 1
	40	#define OSPF_NETWORK_LSA 2
	41	#define OSPF_SUMMARY_LSA 3
	42	#define OSPF_ASBR_SUMMARY_LSA 4
	43	#define OSPF_AS_EXTERNAL_LSA 5
	44	#define OSPF_GROUP_MEMBER_LSA 6 /* Not supported. */
	45	#define OSPF_AS_NSSA_LSA 7
	46	#define OSPF_EXTERNAL_ATTRIBUTES_LSA 8 /* Not supported. */
	47	#define OSPF_OPAQUE_LINK_LSA 9
	48	#define OSPF_OPAQUE_AREA_LSA 10
	49	#define OSPF_OPAQUE_AS_LSA 11
	50
779adb01	51	#define OSPF_LSA_HEADER_SIZE 20U
779adb01	52	#define OSPF_ROUTER_LSA_LINK_SIZE 12U
05b7709d	53	#define OSPF_ROUTER_LSA_TOS_SIZE 4U
779adb01	54	#define OSPF_MAX_LSA_SIZE 1500U
718e3744	55
	56	/* AS-external-LSA refresh method. */
	57	#define LSA_REFRESH_IF_CHANGED 0
	58	#define LSA_REFRESH_FORCE 1
	59
	60	/* OSPF LSA header. */
d62a17ae	61	struct lsa_header {
d7c0a89a QY	62	uint16_t ls_age;
	63	uint8_t options;
	64	uint8_t type;
d62a17ae	65	struct in_addr id;
d62a17ae	66	struct in_addr adv_router;
d7c0a89a QY	67	uint32_t ls_seqnum;
	68	uint16_t checksum;
	69	uint16_t length;
718e3744	70	};
	71
	72	/* OSPF LSA. */
d62a17ae	73	struct ospf_lsa {
d62a17ae	74	/* LSA origination flag. */
d7c0a89a	75	uint8_t flags;
718e3744	76	#define OSPF_LSA_SELF 0x01
	77	#define OSPF_LSA_SELF_CHECKED 0x02
	78	#define OSPF_LSA_RECEIVED 0x04
	79	#define OSPF_LSA_APPROVED 0x08
	80	#define OSPF_LSA_DISCARD 0x10
718e3744	81	#define OSPF_LSA_LOCAL_XLT 0x20
7ddf1d6e	82	#define OSPF_LSA_PREMATURE_AGE 0x40
3106a032	83	#define OSPF_LSA_IN_MAXAGE 0x80
718e3744	84
d62a17ae	85	/* LSA data. */
d62a17ae	86	struct lsa_header *data;
718e3744	87
d62a17ae	88	/* Received time stamp. */
d62a17ae	89	struct timeval tv_recv;
718e3744	90
d62a17ae	91	/* Last time it was originated */
d62a17ae	92	struct timeval tv_orig;
718e3744	93
d62a17ae	94	/* All of reference count, also lock to remove. */
d62a17ae	95	int lock;
718e3744	96
d62a17ae	97	/* Flags for the SPF calculation. */
	98	int stat;
	99	#define LSA_SPF_NOT_EXPLORED -1
	100	#define LSA_SPF_IN_SPFTREE -2
	101	/* If stat >= 0, stat is LSA position in candidates heap. */
718e3744	102
d62a17ae	103	/* References to this LSA in neighbor retransmission lists*/
d62a17ae	104	int retransmit_counter;
718e3744	105
d62a17ae	106	/* Area the LSA belongs to, may be NULL if AS-external-LSA. */
d62a17ae	107	struct ospf_area *area;
718e3744	108
d62a17ae	109	/* Parent LSDB. */
d62a17ae	110	struct ospf_lsdb *lsdb;
718e3744	111
d62a17ae	112	/* Related Route. */
	113	void *route;
	114
	115	/* Refreshement List or Queue */
	116	int refresh_list;
	117
	118	/* For Type-9 Opaque-LSAs */
	119	struct ospf_interface *oi;
b5a8894d CS	120
	121	/* VRF Id */
	122	vrf_id_t vrf_id;
718e3744	123	};
	124
	125	/* OSPF LSA Link Type. */
	126	#define LSA_LINK_TYPE_POINTOPOINT 1
	127	#define LSA_LINK_TYPE_TRANSIT 2
	128	#define LSA_LINK_TYPE_STUB 3
	129	#define LSA_LINK_TYPE_VIRTUALLINK 4
	130
	131	/* OSPF Router LSA Flag. */
	132	#define ROUTER_LSA_BORDER 0x01 /* The router is an ABR */
	133	#define ROUTER_LSA_EXTERNAL 0x02 /* The router is an ASBR */
	134	#define ROUTER_LSA_VIRTUAL 0x04 /* The router has a VL in this area */
0c9491b3	135	#define ROUTER_LSA_NT 0x10 /* The routers always translates Type-7 */
718e3744	136	#define ROUTER_LSA_SHORTCUT 0x20 /* Shortcut-ABR specific flag */
	137
	138	#define IS_ROUTER_LSA_VIRTUAL(x) ((x)->flags & ROUTER_LSA_VIRTUAL)
	139	#define IS_ROUTER_LSA_EXTERNAL(x) ((x)->flags & ROUTER_LSA_EXTERNAL)
	140	#define IS_ROUTER_LSA_BORDER(x) ((x)->flags & ROUTER_LSA_BORDER)
	141	#define IS_ROUTER_LSA_SHORTCUT(x) ((x)->flags & ROUTER_LSA_SHORTCUT)
0c9491b3	142	#define IS_ROUTER_LSA_NT(x) ((x)->flags & ROUTER_LSA_NT)
718e3744	143
718e3744	144	/* OSPF Router-LSA Link information. */
d62a17ae	145	struct router_lsa_link {
	146	struct in_addr link_id;
	147	struct in_addr link_data;
	148	struct {
d7c0a89a QY	149	uint8_t type;
	150	uint8_t tos_count;
	151	uint16_t metric;
d62a17ae	152	} m[1];
718e3744	153	};
	154
	155	/* OSPF Router-LSAs structure. */
a25a44db DO	156	#define OSPF_ROUTER_LSA_MIN_SIZE 4U /* w/0 link descriptors */
	157	/* There is an edge case, when number of links in a Router-LSA may be 0 without
	158	breaking the specification. A router, which has no other links to backbone
	159	area besides one virtual link, will not put any VL descriptor blocks into
	160	the Router-LSA generated for area 0 until a full adjacency over the VL is
	161	reached (RFC2328 12.4.1.3). In this case the Router-LSA initially received
	162	by the other end of the VL will have 0 link descriptor blocks, but soon will
	163	be replaced with the next revision having 1 descriptor block. */
d62a17ae	164	struct router_lsa {
d62a17ae	165	struct lsa_header header;
d7c0a89a QY	166	uint8_t flags;
	167	uint8_t zero;
	168	uint16_t links;
d62a17ae	169	struct {
	170	struct in_addr link_id;
	171	struct in_addr link_data;
d7c0a89a QY	172	uint8_t type;
	173	uint8_t tos;
	174	uint16_t metric;
d62a17ae	175	} link[1];
718e3744	176	};
	177
	178	/* OSPF Network-LSAs structure. */
4e31de79	179	#define OSPF_NETWORK_LSA_MIN_SIZE 8U /* w/1 router-ID */
d62a17ae	180	struct network_lsa {
	181	struct lsa_header header;
	182	struct in_addr mask;
	183	struct in_addr routers[1];
718e3744	184	};
	185
	186	/* OSPF Summary-LSAs structure. */
4e31de79	187	#define OSPF_SUMMARY_LSA_MIN_SIZE 8U /* w/1 TOS metric block */
d62a17ae	188	struct summary_lsa {
	189	struct lsa_header header;
	190	struct in_addr mask;
d7c0a89a QY	191	uint8_t tos;
d7c0a89a QY	192	uint8_t metric[3];
718e3744	193	};
	194
	195	/* OSPF AS-external-LSAs structure. */
4e31de79	196	#define OSPF_AS_EXTERNAL_LSA_MIN_SIZE 16U /* w/1 TOS forwarding block */
d62a17ae	197	struct as_external_lsa {
	198	struct lsa_header header;
	199	struct in_addr mask;
	200	struct {
d7c0a89a QY	201	uint8_t tos;
d7c0a89a QY	202	uint8_t metric[3];
d62a17ae	203	struct in_addr fwd_addr;
d7c0a89a	204	uint32_t route_tag;
d62a17ae	205	} e[1];
718e3744	206	};
718e3744	207
718e3744	208	#include "ospfd/ospf_opaque.h"
718e3744	209
	210	/* Macros. */
	211	#define GET_METRIC(x) get_metric(x)
	212	#define IS_EXTERNAL_METRIC(x) ((x) & 0x80)
	213
	214	#define GET_AGE(x) (ntohs ((x)->data->ls_age) + time (NULL) - (x)->tv_recv)
d62a17ae	215	#define LS_AGE(x) (OSPF_LSA_MAXAGE < get_age(x) ? OSPF_LSA_MAXAGE : get_age(x))
718e3744	216	#define IS_LSA_SELF(L) (CHECK_FLAG ((L)->flags, OSPF_LSA_SELF))
	217	#define IS_LSA_MAXAGE(L) (LS_AGE ((L)) == OSPF_LSA_MAXAGE)
	218
718e3744	219	#define OSPF_LSA_UPDATE_DELAY 2
718e3744	220
d62a17ae	221	#define OSPF_LSA_UPDATE_TIMER_ON(T, F) \
	222	if (!(T)) \
	223	(T) = thread_add_timer(master, (F), 0, 2)
718e3744	224
718e3744	225	/* Prototypes. */
4dadc291	226	/* XXX: Eek, time functions, similar are in lib/thread.c */
d62a17ae	227	extern struct timeval int2tv(int);
d62a17ae	228	extern struct timeval msec2tv(int);
4dadc291	229
d62a17ae	230	extern int get_age(struct ospf_lsa *);
d7c0a89a	231	extern uint16_t ospf_lsa_checksum(struct lsa_header *);
d62a17ae	232	extern int ospf_lsa_checksum_valid(struct lsa_header *);
d62a17ae	233	extern int ospf_lsa_refresh_delay(struct ospf_lsa *);
4dadc291	234
d62a17ae	235	extern const char dump_lsa_key(struct ospf_lsa );
d7c0a89a QY	236	extern uint32_t lsa_seqnum_increment(struct ospf_lsa *);
d7c0a89a QY	237	extern void lsa_header_set(struct stream *, uint8_t, uint8_t, struct in_addr,
d62a17ae	238	struct in_addr);
	239	extern struct ospf_neighbor ospf_nbr_lookup_ptop(struct ospf_interface );
	240	extern int ospf_check_nbr_status(struct ospf *);
718e3744	241
718e3744	242	/* Prototype for LSA primitive. */
d62a17ae	243	extern struct ospf_lsa *ospf_lsa_new(void);
5b3d4186	244	extern struct ospf_lsa *ospf_lsa_new_and_data(size_t size);
d62a17ae	245	extern struct ospf_lsa ospf_lsa_dup(struct ospf_lsa );
	246	extern void ospf_lsa_free(struct ospf_lsa *);
	247	extern struct ospf_lsa ospf_lsa_lock(struct ospf_lsa );
	248	extern void ospf_lsa_unlock(struct ospf_lsa **);
	249	extern void ospf_lsa_discard(struct ospf_lsa *);
	250	extern int ospf_lsa_flush_schedule(struct ospf , struct ospf_lsa );
	251	extern struct lsa_header *ospf_lsa_data_new(size_t);
	252	extern struct lsa_header ospf_lsa_data_dup(struct lsa_header );
	253	extern void ospf_lsa_data_free(struct lsa_header *);
718e3744	254
718e3744	255	/* Prototype for various LSAs */
d62a17ae	256	extern int ospf_router_lsa_update(struct ospf *);
	257	extern int ospf_router_lsa_update_area(struct ospf_area *);
	258
	259	extern void ospf_network_lsa_update(struct ospf_interface *);
	260
	261	extern struct ospf_lsa *
d7c0a89a	262	ospf_summary_lsa_originate(struct prefix_ipv4 , uint32_t, struct ospf_area );
d62a17ae	263	extern struct ospf_lsa ospf_summary_asbr_lsa_originate(struct prefix_ipv4 ,
d7c0a89a	264	uint32_t,
d62a17ae	265	struct ospf_area *);
	266
	267	extern struct ospf_lsa ospf_lsa_install(struct ospf , struct ospf_interface *,
	268	struct ospf_lsa *);
	269
	270	extern void ospf_nssa_lsa_flush(struct ospf ospf, struct prefix_ipv4 p);
d7c0a89a QY	271	extern void ospf_external_lsa_flush(struct ospf *, uint8_t,
d7c0a89a QY	272	struct prefix_ipv4 *,
d62a17ae	273	ifindex_t /* , struct in_addr nexthop */);
	274
	275	extern struct in_addr ospf_get_ip_from_ifp(struct ospf_interface *);
	276
	277	extern struct ospf_lsa ospf_external_lsa_originate(struct ospf ,
	278	struct external_info *);
	279	extern int ospf_external_lsa_originate_timer(struct thread *);
	280	extern int ospf_default_originate_timer(struct thread *);
b5a8894d	281	extern struct ospf_lsa ospf_lsa_lookup(struct ospf ospf, struct ospf_area *,
d7c0a89a	282	uint32_t, struct in_addr,
b5a8894d	283	struct in_addr);
d7c0a89a	284	extern struct ospf_lsa ospf_lsa_lookup_by_id(struct ospf_area , uint32_t,
d62a17ae	285	struct in_addr);
	286	extern struct ospf_lsa ospf_lsa_lookup_by_header(struct ospf_area ,
	287	struct lsa_header *);
	288	extern int ospf_lsa_more_recent(struct ospf_lsa , struct ospf_lsa );
	289	extern int ospf_lsa_different(struct ospf_lsa , struct ospf_lsa );
	290	extern void ospf_flush_self_originated_lsas_now(struct ospf *);
	291
	292	extern int ospf_lsa_is_self_originated(struct ospf , struct ospf_lsa );
	293
d7c0a89a	294	extern struct ospf_lsa ospf_lsa_lookup_by_prefix(struct ospf_lsdb , uint8_t,
d62a17ae	295	struct prefix_ipv4 *,
	296	struct in_addr);
	297
	298	extern void ospf_lsa_maxage(struct ospf , struct ospf_lsa );
d7c0a89a	299	extern uint32_t get_metric(uint8_t *);
d62a17ae	300
	301	extern int ospf_lsa_maxage_walker(struct thread *);
	302	extern struct ospf_lsa ospf_lsa_refresh(struct ospf , struct ospf_lsa *);
	303
	304	extern void ospf_external_lsa_refresh_default(struct ospf *);
313919d6	305	extern void ospf_default_originate_lsa_update(struct ospf *ospf);
d62a17ae	306
d7c0a89a QY	307	extern void ospf_external_lsa_refresh_type(struct ospf *, uint8_t,
d7c0a89a QY	308	unsigned short, int);
d62a17ae	309	extern struct ospf_lsa ospf_external_lsa_refresh(struct ospf ,
	310	struct ospf_lsa *,
	311	struct external_info *, int);
	312	extern struct in_addr ospf_lsa_unique_id(struct ospf , struct ospf_lsdb ,
d7c0a89a	313	uint8_t, struct prefix_ipv4 *);
d62a17ae	314	extern void ospf_schedule_lsa_flood_area(struct ospf_area , struct ospf_lsa );
	315	extern void ospf_schedule_lsa_flush_area(struct ospf_area , struct ospf_lsa );
	316
	317	extern void ospf_refresher_register_lsa(struct ospf , struct ospf_lsa );
	318	extern void ospf_refresher_unregister_lsa(struct ospf , struct ospf_lsa );
	319	extern int ospf_lsa_refresh_walker(struct thread *);
	320
	321	extern void ospf_lsa_maxage_delete(struct ospf , struct ospf_lsa );
	322
	323	extern void ospf_discard_from_db(struct ospf , struct ospf_lsdb ,
	324	struct ospf_lsa *);
	325	extern int is_prefix_default(struct prefix_ipv4 *);
	326
d7c0a89a QY	327	extern int metric_type(struct ospf *, uint8_t, unsigned short);
d7c0a89a QY	328	extern int metric_value(struct ospf *, uint8_t, unsigned short);
d62a17ae	329
	330	extern struct in_addr ospf_get_nssa_ip(struct ospf_area *);
	331	extern int ospf_translated_nssa_compare(struct ospf_lsa , struct ospf_lsa );
	332	extern struct ospf_lsa ospf_translated_nssa_refresh(struct ospf ,
	333	struct ospf_lsa *,
	334	struct ospf_lsa *);
	335	extern struct ospf_lsa ospf_translated_nssa_originate(struct ospf ,
	336	struct ospf_lsa *);
f2c80652	337
718e3744	338	#endif /* _ZEBRA_OSPF_LSA_H */