/* $NetBSD: ldp_peer.h,v 1.1 2010/12/08 07:20:14 kefren Exp $ */

/*-
 * Copyright (c) 2010 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Mihai Chelaru <kefren@NetBSD.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _LDP_PEER_H_
#define _LDP_PEER_H_

#include "sys/types.h"
#include "sys/queue.h"
#include "netinet/in.h"

#include "tlv.h"

struct ldp_peer_address {
	struct in_addr  address;
	SLIST_ENTRY(ldp_peer_address) addresses;
};

struct label_mapping {
	struct in_addr  address;
	int             prefix;
	int             label;
	SLIST_ENTRY(label_mapping) mappings;
};


struct ldp_peer {
	/*
	 * I add routes to address.
	 * I maintain LDP TCP connection on transport_address.
	 * I use ldp_id as peer identificator.
	 */
	struct in_addr  address, transport_address, ldp_id;
	/* TCP socket */
	int             socket;
	/* Usual peer parameters */
	uint16_t	holdtime, timeout;
	int		master;	/* 0 if we're passive */
	int		state;	/* see below for possible states */
	time_t		established_t;	/* time when it did connected */
	/* Here I maintain all the addresses announced by a peer */
	SLIST_HEAD(,ldp_peer_address) ldp_peer_address_head;
	SLIST_HEAD(,label_mapping) label_mapping_head;

	SLIST_ENTRY(ldp_peer) peers;
};
SLIST_HEAD(,ldp_peer) ldp_peer_head;

struct peer_map {
	struct ldp_peer *peer;
	struct label_mapping *lm;
};

/* LDP Peers States */
#define	LDP_PEER_CONNECTING	0
#define	LDP_PEER_CONNECTED	1
#define	LDP_PEER_ESTABLISHED	2
#define	LDP_PEER_HOLDDOWN	3

void            ldp_peer_init(void);
struct ldp_peer *	ldp_peer_new(struct in_addr *, struct in_addr *,
				struct in_addr *, uint16_t, int);
void            ldp_peer_holddown(struct ldp_peer *);
void            ldp_peer_delete(struct ldp_peer *);
struct ldp_peer *	get_ldp_peer(struct in_addr *);
struct ldp_peer *	get_ldp_peer_by_socket(int);
int             add_ifaddresses(struct ldp_peer *, struct al_tlv *);
int             add_ifaddr(struct ldp_peer *, struct in_addr *);
int             del_ifaddr(struct ldp_peer *, struct in_addr *);
struct ldp_peer_address *	check_ifaddr(struct ldp_peer *,
					struct in_addr *);
void            print_bounded_addresses(struct ldp_peer *);
void            del_all_ifaddr(struct ldp_peer *);
int             del_ifaddresses(struct ldp_peer *, struct al_tlv *);
void            add_my_if_addrs(struct in_addr *, int);

int             ldp_peer_add_mapping(struct ldp_peer *, struct in_addr *,
				int, int);
int             ldp_peer_delete_mapping(struct ldp_peer *, struct in_addr *,
				int);
struct label_mapping *	ldp_peer_get_lm(struct ldp_peer *, struct in_addr *,
				int);
int             ldp_peer_delete_all_mappings(struct ldp_peer *);
void		ldp_peer_holddown_all(void);

struct peer_map *	ldp_test_mapping(struct in_addr *, int,
					struct in_addr *);

const char *	ldp_state_to_name(int);

#endif	/* !_LDP_PEER_H_ */