1/* $NetBSD: ldp_peer.h,v 1.9 2020/04/22 23:53:27 joerg Exp $ */
2
3/*-
4 * Copyright (c) 2010 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Mihai Chelaru <kefren@NetBSD.org>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef _LDP_PEER_H_
33#define _LDP_PEER_H_
34
35#include "sys/types.h"
36#include "sys/rbtree.h"
37#include "sys/queue.h"
38#include "netinet/in.h"
39
40#include "mpls_routes.h"
41#include "tlv.h"
42
43struct ldp_peer_address {
44	union sockunion address;
45	SLIST_ENTRY(ldp_peer_address) addresses;
46};
47
48struct label_mapping {
49	union sockunion address;
50	uint	prefix;
51	uint	label;
52	rb_node_t mappings_node;
53};
54
55struct ldp_peer {
56	/*
57	 * I add routes to address.
58	 * I maintain LDP TCP connection on transport_address.
59	 * I use ldp_id as peer identificator.
60	 */
61	struct sockaddr *address, *transport_address;
62	/* According to draft-ietf-mpls-ldp-ipv6-07 ID is IPv4 only for now */
63	struct in_addr	ldp_id;
64	/* TCP socket */
65	int             socket;
66	/* Rest of the peer parameters */
67	uint16_t	holdtime, timeout;
68	int		master;	/* 0 if we're passive */
69	int		state;	/* see below for possible states */
70	time_t		established_t;	/* time when it did connect */
71	/* Here I maintain all the addresses announced by a peer */
72	SLIST_HEAD(,ldp_peer_address) ldp_peer_address_head;
73	rb_tree_t label_mapping_tree;
74
75	SLIST_ENTRY(ldp_peer) peers;
76};
77extern SLIST_HEAD(ldp_peer_head,ldp_peer) ldp_peer_head;
78
79struct peer_map {
80	struct ldp_peer *peer;
81	struct label_mapping *lm;
82};
83
84/* LDP Peers States */
85#define	LDP_PEER_CONNECTING	0
86#define	LDP_PEER_CONNECTED	1
87#define	LDP_PEER_ESTABLISHED	2
88#define	LDP_PEER_HOLDDOWN	3
89
90int	sockaddr_cmp(const struct sockaddr *, const struct sockaddr *);
91void            ldp_peer_init(void);
92struct ldp_peer * ldp_peer_new(const struct in_addr *, const struct sockaddr *,
93				const struct sockaddr *, uint16_t, int);
94void            ldp_peer_holddown(struct ldp_peer *);
95void            ldp_peer_delete(struct ldp_peer *);
96struct ldp_peer * get_ldp_peer(const struct sockaddr *);
97struct ldp_peer * get_ldp_peer_by_id(const struct in_addr *);
98struct ldp_peer * get_ldp_peer_by_socket(int);
99int add_ifaddresses(struct ldp_peer *, const struct al_tlv *);
100int add_ifaddr(struct ldp_peer *, const struct sockaddr *);
101int del_ifaddr(struct ldp_peer *, const struct sockaddr *);
102struct ldp_peer_address * check_ifaddr(const struct ldp_peer *,
103	const struct sockaddr *);
104void print_bounded_addresses(const struct ldp_peer *);
105void del_all_ifaddr(struct ldp_peer *);
106int del_ifaddresses(struct ldp_peer *, const struct al_tlv *);
107
108int ldp_peer_add_mapping(struct ldp_peer *, const struct sockaddr *, int, int);
109int ldp_peer_delete_mapping(struct ldp_peer *, const struct sockaddr *, int);
110void ldp_peer_delete_all_mappings(struct ldp_peer *);
111void ldp_peer_holddown_all(void);
112
113struct peer_map * ldp_test_mapping(const struct sockaddr *, int,
114	const struct sockaddr *);
115struct label_mapping * ldp_peer_lm_right(struct ldp_peer *,
116	struct label_mapping *);
117
118const char * ldp_state_to_name(int);
119
120#endif	/* !_LDP_PEER_H_ */
121