[mirror_frr.git] / bgpd / bgp_advertise.h

/* BGP advertisement and adjacency
 * Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
 *
 * 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 _QUAGGA_BGP_ADVERTISE_H
#define _QUAGGA_BGP_ADVERTISE_H

#include <lib/fifo.h>

struct update_subgroup;

/* BGP advertise FIFO.  */
struct bgp_advertise_fifo {
	struct bgp_advertise *next;
	struct bgp_advertise *prev;
	uint32_t count;
};

/* BGP advertise attribute.  */
struct bgp_advertise_attr {
	/* Head of advertisement pointer. */
	struct bgp_advertise *adv;

	/* Reference counter.  */
	unsigned long refcnt;

	/* Attribute pointer to be announced.  */
	struct attr *attr;
};

struct bgp_advertise {
	/* FIFO for advertisement.  */
	struct bgp_advertise_fifo fifo;

	/* Link list for same attribute advertise.  */
	struct bgp_advertise *next;
	struct bgp_advertise *prev;

	/* Prefix information.  */
	struct bgp_node *rn;

	/* Reference pointer.  */
	struct bgp_adj_out *adj;

	/* Advertisement attribute.  */
	struct bgp_advertise_attr *baa;

	/* BGP info.  */
	struct bgp_path_info *pathi;
};

/* BGP adjacency out.  */
struct bgp_adj_out {
	/* Lined list pointer.  */
	struct bgp_adj_out *next;
	struct bgp_adj_out *prev;

	/* Advertised subgroup.  */
	struct update_subgroup *subgroup;

	/* Threading that makes the adj part of subgroup's adj queue */
	TAILQ_ENTRY(bgp_adj_out) subgrp_adj_train;

	/* Prefix information.  */
	struct bgp_node *rn;

	uint32_t addpath_tx_id;

	/* Advertised attribute.  */
	struct attr *attr;

	/* Advertisement information.  */
	struct bgp_advertise *adv;
};

/* BGP adjacency in. */
struct bgp_adj_in {
	/* Linked list pointer.  */
	struct bgp_adj_in *next;
	struct bgp_adj_in *prev;

	/* Received peer.  */
	struct peer *peer;

	/* Received attribute.  */
	struct attr *attr;

	/* Addpath identifier */
	uint32_t addpath_rx_id;
};

/* BGP advertisement list.  */
struct bgp_synchronize {
	struct bgp_advertise_fifo update;
	struct bgp_advertise_fifo withdraw;
	struct bgp_advertise_fifo withdraw_low;
};

/* BGP adjacency linked list.  */
#define BGP_PATH_INFO_ADD(N, A, TYPE)                                          \
	do {                                                                   \
		(A)->prev = NULL;                                              \
		(A)->next = (N)->TYPE;                                         \
		if ((N)->TYPE)                                                 \
			(N)->TYPE->prev = (A);                                 \
		(N)->TYPE = (A);                                               \
	} while (0)

#define BGP_PATH_INFO_DEL(N, A, TYPE)                                          \
	do {                                                                   \
		if ((A)->next)                                                 \
			(A)->next->prev = (A)->prev;                           \
		if ((A)->prev)                                                 \
			(A)->prev->next = (A)->next;                           \
		else                                                           \
			(N)->TYPE = (A)->next;                                 \
	} while (0)

#define BGP_ADJ_IN_ADD(N, A) BGP_PATH_INFO_ADD(N, A, adj_in)
#define BGP_ADJ_IN_DEL(N, A) BGP_PATH_INFO_DEL(N, A, adj_in)
#define BGP_ADJ_OUT_ADD(N, A) BGP_PATH_INFO_ADD(N, A, adj_out)
#define BGP_ADJ_OUT_DEL(N, A) BGP_PATH_INFO_DEL(N, A, adj_out)

#define BGP_ADV_FIFO_ADD(F, N)                                                 \
	do {                                                                   \
		FIFO_ADD((F), (N));                                            \
		(F)->count++;                                                  \
	} while (0)

#define BGP_ADV_FIFO_DEL(F, N)                                                 \
	do {                                                                   \
		FIFO_DEL((N));                                                 \
		(F)->count--;                                                  \
	} while (0)

#define BGP_ADV_FIFO_INIT(F)                                                   \
	do {                                                                   \
		FIFO_INIT((F));                                                \
		(F)->count = 0;                                                \
	} while (0)

#define BGP_ADV_FIFO_COUNT(F) (F)->count

#define BGP_ADV_FIFO_EMPTY(F)                                                  \
	(((struct bgp_advertise_fifo *)(F))->next                              \
	 == (struct bgp_advertise *)(F))

#define BGP_ADV_FIFO_HEAD(F)                                                   \
	((((struct bgp_advertise_fifo *)(F))->next                             \
	  == (struct bgp_advertise *)(F))                                      \
		 ? NULL                                                        \
		 : (F)->next)

/* Prototypes.  */
extern int bgp_adj_out_lookup(struct peer *, struct bgp_node *, uint32_t);
extern void bgp_adj_in_set(struct bgp_node *, struct peer *, struct attr *,
			   uint32_t);
extern int bgp_adj_in_unset(struct bgp_node *, struct peer *, uint32_t);
extern void bgp_adj_in_remove(struct bgp_node *, struct bgp_adj_in *);

extern void bgp_sync_init(struct peer *);
extern void bgp_sync_delete(struct peer *);
extern unsigned int baa_hash_key(void *p);
extern bool baa_hash_cmp(const void *p1, const void *p2);
extern void bgp_advertise_add(struct bgp_advertise_attr *baa,
			      struct bgp_advertise *adv);
extern struct bgp_advertise *bgp_advertise_new(void);
extern void bgp_advertise_free(struct bgp_advertise *adv);
extern struct bgp_advertise_attr *bgp_advertise_intern(struct hash *hash,
						       struct attr *attr);
extern struct bgp_advertise_attr *baa_new(void);
extern void bgp_advertise_delete(struct bgp_advertise_attr *baa,
				 struct bgp_advertise *adv);
extern void bgp_advertise_unintern(struct hash *hash,
				   struct bgp_advertise_attr *baa);

#endif /* _QUAGGA_BGP_ADVERTISE_H */
Commit	Line	Data
	1	/* BGP advertisement and adjacency
	2	* Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
	3	*
	4	* This file is part of GNU Zebra.
	5	*
	6	* GNU Zebra is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2, or (at your option) any
	9	* later version.
	10	*
	11	* GNU Zebra is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License along
	17	* with this program; see the file COPYING; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	#ifndef _QUAGGA_BGP_ADVERTISE_H
	22	#define _QUAGGA_BGP_ADVERTISE_H
	23
	24	#include <lib/fifo.h>
	25
	26	struct update_subgroup;
	27
	28	/* BGP advertise FIFO. */
	29	struct bgp_advertise_fifo {
	30	struct bgp_advertise *next;
	31	struct bgp_advertise *prev;
	32	uint32_t count;
	33	};
	34
	35	/* BGP advertise attribute. */
	36	struct bgp_advertise_attr {
	37	/* Head of advertisement pointer. */
	38	struct bgp_advertise *adv;
	39
	40	/* Reference counter. */
	41	unsigned long refcnt;
	42
	43	/* Attribute pointer to be announced. */
	44	struct attr *attr;
	45	};
	46
	47	struct bgp_advertise {
	48	/* FIFO for advertisement. */
	49	struct bgp_advertise_fifo fifo;
	50
	51	/* Link list for same attribute advertise. */
	52	struct bgp_advertise *next;
	53	struct bgp_advertise *prev;
	54
	55	/* Prefix information. */
	56	struct bgp_node *rn;
	57
	58	/* Reference pointer. */
	59	struct bgp_adj_out *adj;
	60
	61	/* Advertisement attribute. */
	62	struct bgp_advertise_attr *baa;
	63
	64	/* BGP info. */
	65	struct bgp_path_info *pathi;
	66	};
	67
	68	/* BGP adjacency out. */
	69	struct bgp_adj_out {
	70	/* Lined list pointer. */
	71	struct bgp_adj_out *next;
	72	struct bgp_adj_out *prev;
	73
	74	/* Advertised subgroup. */
	75	struct update_subgroup *subgroup;
	76
	77	/* Threading that makes the adj part of subgroup's adj queue */
	78	TAILQ_ENTRY(bgp_adj_out) subgrp_adj_train;
	79
	80	/* Prefix information. */
	81	struct bgp_node *rn;
	82
	83	uint32_t addpath_tx_id;
	84
	85	/* Advertised attribute. */
	86	struct attr *attr;
	87
	88	/* Advertisement information. */
	89	struct bgp_advertise *adv;
	90	};
	91
	92	/* BGP adjacency in. */
	93	struct bgp_adj_in {
	94	/* Linked list pointer. */
	95	struct bgp_adj_in *next;
	96	struct bgp_adj_in *prev;
	97
	98	/* Received peer. */
	99	struct peer *peer;
	100
	101	/* Received attribute. */
	102	struct attr *attr;
	103
	104	/* Addpath identifier */
	105	uint32_t addpath_rx_id;
	106	};
	107
	108	/* BGP advertisement list. */
	109	struct bgp_synchronize {
	110	struct bgp_advertise_fifo update;
	111	struct bgp_advertise_fifo withdraw;
	112	struct bgp_advertise_fifo withdraw_low;
	113	};
	114
	115	/* BGP adjacency linked list. */
	116	#define BGP_PATH_INFO_ADD(N, A, TYPE) \
	117	do { \
	118	(A)->prev = NULL; \
	119	(A)->next = (N)->TYPE; \
	120	if ((N)->TYPE) \
	121	(N)->TYPE->prev = (A); \
	122	(N)->TYPE = (A); \
	123	} while (0)
	124
	125	#define BGP_PATH_INFO_DEL(N, A, TYPE) \
	126	do { \
	127	if ((A)->next) \
	128	(A)->next->prev = (A)->prev; \
	129	if ((A)->prev) \
	130	(A)->prev->next = (A)->next; \
	131	else \
	132	(N)->TYPE = (A)->next; \
	133	} while (0)
	134
	135	#define BGP_ADJ_IN_ADD(N, A) BGP_PATH_INFO_ADD(N, A, adj_in)
	136	#define BGP_ADJ_IN_DEL(N, A) BGP_PATH_INFO_DEL(N, A, adj_in)
	137	#define BGP_ADJ_OUT_ADD(N, A) BGP_PATH_INFO_ADD(N, A, adj_out)
	138	#define BGP_ADJ_OUT_DEL(N, A) BGP_PATH_INFO_DEL(N, A, adj_out)
	139
	140	#define BGP_ADV_FIFO_ADD(F, N) \
	141	do { \
	142	FIFO_ADD((F), (N)); \
	143	(F)->count++; \
	144	} while (0)
	145
	146	#define BGP_ADV_FIFO_DEL(F, N) \
	147	do { \
	148	FIFO_DEL((N)); \
	149	(F)->count--; \
	150	} while (0)
	151
	152	#define BGP_ADV_FIFO_INIT(F) \
	153	do { \
	154	FIFO_INIT((F)); \
	155	(F)->count = 0; \
	156	} while (0)
	157
	158	#define BGP_ADV_FIFO_COUNT(F) (F)->count
	159
	160	#define BGP_ADV_FIFO_EMPTY(F) \
	161	(((struct bgp_advertise_fifo *)(F))->next \
	162	== (struct bgp_advertise *)(F))
	163
	164	#define BGP_ADV_FIFO_HEAD(F) \
	165	((((struct bgp_advertise_fifo *)(F))->next \
	166	== (struct bgp_advertise *)(F)) \
	167	? NULL \
	168	: (F)->next)
	169
	170	/* Prototypes. */
	171	extern int bgp_adj_out_lookup(struct peer , struct bgp_node , uint32_t);
	172	extern void bgp_adj_in_set(struct bgp_node , struct peer , struct attr *,
	173	uint32_t);
	174	extern int bgp_adj_in_unset(struct bgp_node , struct peer , uint32_t);
	175	extern void bgp_adj_in_remove(struct bgp_node , struct bgp_adj_in );
	176
	177	extern void bgp_sync_init(struct peer *);
	178	extern void bgp_sync_delete(struct peer *);
	179	extern unsigned int baa_hash_key(void *p);
	180	extern bool baa_hash_cmp(const void p1, const void p2);
	181	extern void bgp_advertise_add(struct bgp_advertise_attr *baa,
	182	struct bgp_advertise *adv);
	183	extern struct bgp_advertise *bgp_advertise_new(void);
	184	extern void bgp_advertise_free(struct bgp_advertise *adv);
	185	extern struct bgp_advertise_attr bgp_advertise_intern(struct hash hash,
	186	struct attr *attr);
	187	extern struct bgp_advertise_attr *baa_new(void);
	188	extern void bgp_advertise_delete(struct bgp_advertise_attr *baa,
	189	struct bgp_advertise *adv);
	190	extern void bgp_advertise_unintern(struct hash *hash,
	191	struct bgp_advertise_attr *baa);
	192
	193	#endif /* _QUAGGA_BGP_ADVERTISE_H */