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2f688f82da
This submission was done by hand-applying FreeBSD local modifications on top of the UCB code, rather than trying to patch the UCB code in on top of the FreeBSD code due to the extensive changes. Reviewed by: pst (been handling 30k routes for 4+ months) Obtained from: Sklower/Woody/Honing/Traina (8.4 UCB release)
172 lines
6.8 KiB
C
172 lines
6.8 KiB
C
/*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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* $Id$
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*/
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#ifndef _RADIX_H_
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#define _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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caddr_t rn_Key; /* object of search */
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caddr_t 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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extern 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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caddr_t 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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} *rn_mkfreelist;
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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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typedef int walktree_f_t __P((struct radix_node *, void *));
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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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__P((void *v, 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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__P((void *v, 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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__P((void *v, 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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__P((void *v, void *mask, struct radix_node_head *head));
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struct radix_node *(*rnh_matchaddr) /* locate based on sockaddr */
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__P((void *v, struct radix_node_head *head));
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struct radix_node *(*rnh_lookup) /* locate based on sockaddr */
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__P((void *v, 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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__P((void *v, struct radix_node_head *head));
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int (*rnh_walktree) /* traverse tree */
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__P((struct radix_node_head *head, walktree_f_t *f, void *w));
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int (*rnh_walktree_from) /* traverse tree below a */
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__P((struct radix_node_head *head, void *a, void *m,
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walktree_f_t *f, void *w));
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void (*rnh_close) /* do something when the last ref drops */
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__P((struct radix_node *rn, 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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#ifndef KERNEL
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#define Bcmp(a, b, n) bcmp(((char *)(a)), ((char *)(b)), (n))
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#define Bcopy(a, b, n) bcopy(((char *)(a)), ((char *)(b)), (unsigned)(n))
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#define Bzero(p, n) bzero((char *)(p), (int)(n));
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#define R_Malloc(p, t, n) (p = (t) malloc((unsigned int)(n)))
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#define Free(p) free((char *)p);
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#else
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#define Bcmp(a, b, n) bcmp(((caddr_t)(a)), ((caddr_t)(b)), (unsigned)(n))
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#define Bcopy(a, b, n) bcopy(((caddr_t)(a)), ((caddr_t)(b)), (unsigned)(n))
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#define Bzero(p, n) bzero((caddr_t)(p), (unsigned)(n));
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#define R_Malloc(p, t, n) (p = (t) malloc((unsigned long)(n), M_RTABLE, M_DONTWAIT))
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#define Free(p) free((caddr_t)p, M_RTABLE);
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#endif /*KERNEL*/
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extern struct radix_node_head *mask_rnhead;
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void rn_init __P((void));
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int rn_inithead __P((void **, int));
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int rn_refines __P((void *, void *));
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int rn_walktree __P((struct radix_node_head *, walktree_f_t *, void *));
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struct radix_node
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*rn_addmask __P((void *, int, int)),
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*rn_addroute __P((void *, void *, struct radix_node_head *,
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struct radix_node [2])),
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*rn_delete __P((void *, void *, struct radix_node_head *)),
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*rn_insert __P((void *, struct radix_node_head *, int *,
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struct radix_node [2])),
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*rn_match __P((void *, struct radix_node_head *)),
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*rn_newpair __P((void *, int, struct radix_node[2])),
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*rn_search __P((void *, struct radix_node *)),
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*rn_search_m __P((void *, struct radix_node *, void *));
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#endif /* _RADIX_H_ */
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