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      1 /* $NetBSD: label.h,v 1.8 2013/07/31 06:58:23 kefren 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 (at) 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 _LABEL_H_
     33 #define _LABEL_H_
     34 
     35 #include <sys/rbtree.h>
     36 
     37 #include "mpls_routes.h"
     38 #include "ldp_peer.h"
     39 
     40 #define	REATT_INET_CHANGE	0
     41 #define	REATT_INET_DEL		1
     42 #define	REATT_INET_NODEL	2
     43 
     44 /*
     45  * MPLS label descriptor
     46  *
     47  * so_dest, so_pref and so_gate are the prefix identification and its GW
     48  * binding is the local label
     49  * label is the peer associated label
     50  */
     51 struct label {
     52 	union sockunion so_dest, so_pref, so_gate;
     53 	int binding, label;
     54 	bool host;	/* change routes using RTF_HOST */
     55 	const struct ldp_peer *p;
     56 	rb_node_t lbtree;
     57 };
     58 
     59 void            label_init(void);
     60 struct label *	label_add(const union sockunion *, const union sockunion *,
     61 	  const union sockunion *, uint32_t, const struct ldp_peer *, uint32_t,
     62 	  bool);
     63 void            label_del(struct label *);
     64 void            del_all_peer_labels(const struct ldp_peer*, int);
     65 void		label_reattach_all_peer_labels(const struct ldp_peer*, int);
     66 void            label_del_by_binding(uint32_t, int);
     67 struct label *	label_get(const union sockunion *sodest,
     68 	const union sockunion *sopref);
     69 struct label *	label_get_by_prefix(const struct sockaddr *, int);
     70 uint32_t	get_free_local_label(void);
     71 void		announce_label_change(struct label *);
     72 void		label_reattach_route(struct label*, int);
     73 void		label_check_assoc(struct ldp_peer *p);
     74 struct label *	label_get_right(struct label *);
     75 
     76 #endif /* !_LABEL_H_ */
     77