/* * 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 * $FreeBSD: src/sys/net/radix.h,v 1.18 2002/03/19 21:54:18 alfred Exp $ */ #ifndef _RADIX_H_ #define _RADIX_H_ #ifdef MALLOC_DECLARE MALLOC_DECLARE(M_RTABLE); #endif /* * Radix search tree node layout. */ struct radix_node { struct radix_mask *rn_mklist; /* list of masks contained in subtree */ struct radix_node *rn_parent; /* parent */ short rn_bit; /* 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; #ifdef RN_DEBUG int rn_info; struct radix_node *rn_twin; struct radix_node *rn_ybro; #endif }; #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_offset rn_u.rn_node.rn_Off #define rn_left rn_u.rn_node.rn_L #define rn_right rn_u.rn_node.rn_R /* * Annotations to tree concerning potential routes applying to subtrees. */ struct radix_mask { short rm_bit; /* 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 */ #define MKGet(m) {\ if (rn_mkfreelist) {\ m = rn_mkfreelist; \ rn_mkfreelist = (m)->rm_mklist; \ } else \ R_Malloc(m, struct radix_mask *, sizeof (*(m))); }\ #define MKFree(m) { (m)->rm_mklist = rn_mkfreelist; rn_mkfreelist = (m);} typedef int walktree_f_t(struct radix_node *, void *); 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_addaddr) /* add based on sockaddr */ (void *v, void *mask, struct radix_node_head *head, struct radix_node nodes[]); struct radix_node *(*rnh_addpkt) /* add based on packet hdr */ (void *v, void *mask, struct radix_node_head *head, struct radix_node nodes[]); struct radix_node *(*rnh_deladdr) /* remove based on sockaddr */ (void *v, void *mask, struct radix_node_head *head); struct radix_node *(*rnh_delpkt) /* remove based on packet hdr */ (void *v, void *mask, struct radix_node_head *head); struct radix_node *(*rnh_matchaddr) /* locate based on sockaddr */ (void *v, struct radix_node_head *head); struct radix_node *(*rnh_lookup) /* locate based on sockaddr */ (void *v, void *mask, struct radix_node_head *head); struct radix_node *(*rnh_matchpkt) /* locate based on packet hdr */ (void *v, struct radix_node_head *head); int (*rnh_walktree) /* traverse tree */ (struct radix_node_head *head, walktree_f_t *f, void *w); int (*rnh_walktree_from) /* traverse tree below a */ (struct radix_node_head *head, void *a, void *m, walktree_f_t *f, void *w); void (*rnh_close) /* do something when the last ref drops */ (struct radix_node *rn, struct radix_node_head *head); struct radix_node rnh_nodes[3]; /* empty tree for common case */ }; #ifndef _KERNEL #define Bcmp(a, b, n) bcmp(((char *)(a)), ((char *)(b)), (n)) #define Bcopy(a, b, n) bcopy(((char *)(a)), ((char *)(b)), (unsigned)(n)) #define Bzero(p, n) bzero((char *)(p), (int)(n)); #define R_Malloc(p, t, n) (p = (t) malloc((unsigned int)(n))) #define Free(p) free((char *)p); #else #define Bcmp(a, b, n) bcmp(((caddr_t)(a)), ((caddr_t)(b)), (unsigned)(n)) #define Bcopy(a, b, n) bcopy(((caddr_t)(a)), ((caddr_t)(b)), (unsigned)(n)) #define Bzero(p, n) bzero((caddr_t)(p), (unsigned)(n)); #define R_Malloc(p, t, n) (p = (t) malloc((unsigned long)(n), M_RTABLE, M_DONTWAIT)) #define Free(p) free((caddr_t)p, M_RTABLE); #endif /* _KERNEL */ void rn_init(void); int rn_inithead(void **, int); int rn_refines(void *, void *); struct radix_node *rn_addmask(void *, int, int), *rn_addroute (void *, void *, struct radix_node_head *, struct radix_node [2]), *rn_delete(void *, void *, struct radix_node_head *), *rn_lookup (void *v_arg, void *m_arg, struct radix_node_head *head), *rn_match(void *, struct radix_node_head *); #endif /* _RADIX_H_ */