0f2034ae5e
will be processed when the radix "subsystem" is initialized -- all users must be attached before any inits to know the max keylength. Use of link sets is no longer required, and only attached domains need to be considered.
158 lines
6.0 KiB
C
158 lines
6.0 KiB
C
/* $NetBSD: radix.h,v 1.22 2009/05/27 17:46:50 pooka Exp $ */
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/*
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* Copyright (c) 1988, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)radix.h 8.2 (Berkeley) 10/31/94
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*/
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#ifndef _NET_RADIX_H_
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#define _NET_RADIX_H_
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/*
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* Radix search tree node layout.
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*/
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struct radix_node {
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struct radix_mask *rn_mklist; /* list of masks contained in subtree */
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struct radix_node *rn_p; /* parent */
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short rn_b; /* bit offset; -1-index(netmask) */
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char rn_bmask; /* node: mask for bit test*/
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u_char rn_flags; /* enumerated next */
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#define RNF_NORMAL 1 /* leaf contains normal route */
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#define RNF_ROOT 2 /* leaf is root leaf for tree */
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#define RNF_ACTIVE 4 /* This node is alive (for rtfree) */
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union {
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struct { /* leaf only data: */
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const char *rn_Key; /* object of search */
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const char *rn_Mask; /* netmask, if present */
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struct radix_node *rn_Dupedkey;
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} rn_leaf;
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struct { /* node only data: */
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int rn_Off; /* where to start compare */
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struct radix_node *rn_L;/* progeny */
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struct radix_node *rn_R;/* progeny */
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} rn_node;
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} rn_u;
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#ifdef RN_DEBUG
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int rn_info;
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struct radix_node *rn_twin;
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struct radix_node *rn_ybro;
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#endif
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};
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#define rn_dupedkey rn_u.rn_leaf.rn_Dupedkey
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#define rn_key rn_u.rn_leaf.rn_Key
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#define rn_mask rn_u.rn_leaf.rn_Mask
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#define rn_off rn_u.rn_node.rn_Off
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#define rn_l rn_u.rn_node.rn_L
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#define rn_r rn_u.rn_node.rn_R
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/*
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* Annotations to tree concerning potential routes applying to subtrees.
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*/
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struct radix_mask {
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short rm_b; /* bit offset; -1-index(netmask) */
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char rm_unused; /* cf. rn_bmask */
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u_char rm_flags; /* cf. rn_flags */
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struct radix_mask *rm_mklist; /* more masks to try */
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union {
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const char *rmu_mask; /* the mask */
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struct radix_node *rmu_leaf; /* for normal routes */
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} rm_rmu;
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int rm_refs; /* # of references to this struct */
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};
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#define rm_mask rm_rmu.rmu_mask
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#define rm_leaf rm_rmu.rmu_leaf /* extra field would make 32 bytes */
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#define MKGet(m) {\
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if (rn_mkfreelist) {\
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m = rn_mkfreelist; \
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rn_mkfreelist = (m)->rm_mklist; \
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} else \
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R_Malloc(m, struct radix_mask *, sizeof (*(m))); }\
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#define MKFree(m) { (m)->rm_mklist = rn_mkfreelist; rn_mkfreelist = (m);}
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struct radix_node_head {
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struct radix_node *rnh_treetop;
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int rnh_addrsize; /* permit, but not require fixed keys */
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int rnh_pktsize; /* permit, but not require fixed keys */
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struct radix_node *(*rnh_addaddr) /* add based on sockaddr */
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(const void *v, const void *mask,
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struct radix_node_head *head, struct radix_node nodes[]);
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struct radix_node *(*rnh_addpkt) /* add based on packet hdr */
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(const void *v, const void *mask,
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struct radix_node_head *head, struct radix_node nodes[]);
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struct radix_node *(*rnh_deladdr) /* remove based on sockaddr */
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(const void *v, const void *mask, struct radix_node_head *head);
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struct radix_node *(*rnh_delpkt) /* remove based on packet hdr */
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(const void *v, const void *mask, struct radix_node_head *head);
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struct radix_node *(*rnh_matchaddr) /* locate based on sockaddr */
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(const void *v, struct radix_node_head *head);
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struct radix_node *(*rnh_lookup) /* locate based on sockaddr */
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(const void *v, const void *mask, struct radix_node_head *head);
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struct radix_node *(*rnh_matchpkt) /* locate based on packet hdr */
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(const void *v, struct radix_node_head *head);
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struct radix_node rnh_nodes[3]; /* empty tree for common case */
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};
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#ifdef _KERNEL
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extern struct radix_mask *rn_mkfreelist;
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#define R_Malloc(p, t, n) (p = (t) malloc((size_t)(n), M_RTABLE, M_NOWAIT))
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#define Free(p) free(p, M_RTABLE);
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#endif /*_KERNEL*/
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void rn_init(void);
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int rn_inithead(void **, int);
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void rn_delayedinit(void **, int);
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int rn_inithead0(struct radix_node_head *, int);
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int rn_refines(const void *, const void *);
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int rn_walktree(struct radix_node_head *,
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int (*)(struct radix_node *, void *),
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void *);
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struct radix_node
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*rn_addmask(const void *, int, int),
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*rn_addroute(const void *, const void *, struct radix_node_head *,
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struct radix_node [2]),
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*rn_delete1(const void *, const void *, struct radix_node_head *,
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struct radix_node *),
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*rn_delete(const void *, const void *, struct radix_node_head *),
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*rn_insert(const void *, struct radix_node_head *, int *,
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struct radix_node [2]),
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*rn_lookup(const void *, const void *, struct radix_node_head *),
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*rn_match(const void *, struct radix_node_head *),
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*rn_newpair(const void *, int, struct radix_node[2]),
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*rn_search(const void *, struct radix_node *),
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*rn_search_m(const void *, struct radix_node *, const void *);
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#endif /* !_NET_RADIX_H_ */
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