113 lines
4.1 KiB
C
113 lines
4.1 KiB
C
/* $OpenBSD: radix.h,v 1.30 2017/06/19 09:42:45 mpi Exp $ */
|
|
/* $NetBSD: radix.h,v 1.8 1996/02/13 22:00:37 christos Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1988, 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* 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.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
|
*
|
|
* @(#)radix.h 8.2 (Berkeley) 10/31/94
|
|
*/
|
|
|
|
#ifndef _NET_RADIX_H_
|
|
#define _NET_RADIX_H_
|
|
|
|
/*
|
|
* Radix search tree node layout.
|
|
*/
|
|
|
|
struct radix_node {
|
|
struct radix_mask *rn_mklist; /* list of masks contained in subtree */
|
|
struct radix_node *rn_p; /* parent */
|
|
short rn_b; /* bit offset; -1-index(netmask) */
|
|
char rn_bmask; /* node: mask for bit test*/
|
|
u_char rn_flags; /* enumerated next */
|
|
#define RNF_NORMAL 1 /* leaf contains normal route */
|
|
#define RNF_ROOT 2 /* leaf is root leaf for tree */
|
|
#define RNF_ACTIVE 4 /* This node is alive (for rtfree) */
|
|
union {
|
|
struct { /* leaf only data: */
|
|
caddr_t rn_Key; /* object of search */
|
|
caddr_t rn_Mask; /* netmask, if present */
|
|
struct radix_node *rn_Dupedkey;
|
|
} rn_leaf;
|
|
struct { /* node only data: */
|
|
int rn_Off; /* where to start compare */
|
|
struct radix_node *rn_L;/* progeny */
|
|
struct radix_node *rn_R;/* progeny */
|
|
} rn_node;
|
|
} rn_u;
|
|
};
|
|
|
|
#define rn_dupedkey rn_u.rn_leaf.rn_Dupedkey
|
|
#define rn_key rn_u.rn_leaf.rn_Key
|
|
#define rn_mask rn_u.rn_leaf.rn_Mask
|
|
#define rn_off rn_u.rn_node.rn_Off
|
|
#define rn_l rn_u.rn_node.rn_L
|
|
#define rn_r rn_u.rn_node.rn_R
|
|
|
|
/*
|
|
* Annotations to tree concerning potential routes applying to subtrees.
|
|
*/
|
|
|
|
struct radix_mask {
|
|
short rm_b; /* bit offset; -1-index(netmask) */
|
|
char rm_unused; /* cf. rn_bmask */
|
|
u_char rm_flags; /* cf. rn_flags */
|
|
struct radix_mask *rm_mklist; /* more masks to try */
|
|
union {
|
|
caddr_t rmu_mask; /* the mask */
|
|
struct radix_node *rmu_leaf; /* for normal routes */
|
|
} rm_rmu;
|
|
int rm_refs; /* # of references to this struct */
|
|
};
|
|
|
|
#define rm_mask rm_rmu.rmu_mask
|
|
#define rm_leaf rm_rmu.rmu_leaf /* extra field would make 32 bytes */
|
|
|
|
struct radix_node_head {
|
|
struct radix_node *rnh_treetop;
|
|
int rnh_addrsize; /* permit, but not require fixed keys */
|
|
int rnh_pktsize; /* permit, but not require fixed keys */
|
|
struct radix_node rnh_nodes[3];/* empty tree for common case */
|
|
u_int rnh_rtableid;
|
|
};
|
|
|
|
void rn_init(unsigned int);
|
|
int rn_inithead(void **, int);
|
|
|
|
int rn_walktree(struct radix_node_head *,
|
|
int (*)(struct radix_node *, void *, u_int), void *);
|
|
|
|
struct radix_node *rn_addroute(void *, void *, struct radix_node_head *,
|
|
struct radix_node [2], u_int8_t);
|
|
struct radix_node *rn_delete(void *, void *, struct radix_node_head *,
|
|
struct radix_node *);
|
|
struct radix_node *rn_lookup(void *, void *, struct radix_node_head *);
|
|
struct radix_node *rn_match(void *, struct radix_node_head *);
|
|
|
|
#endif /* _NET_RADIX_H_ */
|