1 /* $NetBSD: radix.h,v 1.12 2003/08/07 16:32:56 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)radix.h 8.2 (Berkeley) 10/31/94 32 */ 33 34 #ifndef _NET_RADIX_H_ 35 #define _NET_RADIX_H_ 36 37 /* 38 * Radix search tree node layout. 39 */ 40 41 struct radix_node { 42 struct radix_mask *rn_mklist; /* list of masks contained in subtree */ 43 struct radix_node *rn_p; /* parent */ 44 short rn_b; /* bit offset; -1-index(netmask) */ 45 char rn_bmask; /* node: mask for bit test*/ 46 u_char rn_flags; /* enumerated next */ 47 #define RNF_NORMAL 1 /* leaf contains normal route */ 48 #define RNF_ROOT 2 /* leaf is root leaf for tree */ 49 #define RNF_ACTIVE 4 /* This node is alive (for rtfree) */ 50 union { 51 struct { /* leaf only data: */ 52 caddr_t rn_Key; /* object of search */ 53 caddr_t rn_Mask; /* netmask, if present */ 54 struct radix_node *rn_Dupedkey; 55 } rn_leaf; 56 struct { /* node only data: */ 57 int rn_Off; /* where to start compare */ 58 struct radix_node *rn_L;/* progeny */ 59 struct radix_node *rn_R;/* progeny */ 60 } rn_node; 61 } rn_u; 62 #ifdef RN_DEBUG 63 int rn_info; 64 struct radix_node *rn_twin; 65 struct radix_node *rn_ybro; 66 #endif 67 }; 68 69 #define rn_dupedkey rn_u.rn_leaf.rn_Dupedkey 70 #define rn_key rn_u.rn_leaf.rn_Key 71 #define rn_mask rn_u.rn_leaf.rn_Mask 72 #define rn_off rn_u.rn_node.rn_Off 73 #define rn_l rn_u.rn_node.rn_L 74 #define rn_r rn_u.rn_node.rn_R 75 76 /* 77 * Annotations to tree concerning potential routes applying to subtrees. 78 */ 79 80 extern struct radix_mask { 81 short rm_b; /* bit offset; -1-index(netmask) */ 82 char rm_unused; /* cf. rn_bmask */ 83 u_char rm_flags; /* cf. rn_flags */ 84 struct radix_mask *rm_mklist; /* more masks to try */ 85 union { 86 caddr_t rmu_mask; /* the mask */ 87 struct radix_node *rmu_leaf; /* for normal routes */ 88 } rm_rmu; 89 int rm_refs; /* # of references to this struct */ 90 } *rn_mkfreelist; 91 92 #define rm_mask rm_rmu.rmu_mask 93 #define rm_leaf rm_rmu.rmu_leaf /* extra field would make 32 bytes */ 94 95 #define MKGet(m) {\ 96 if (rn_mkfreelist) {\ 97 m = rn_mkfreelist; \ 98 rn_mkfreelist = (m)->rm_mklist; \ 99 } else \ 100 R_Malloc(m, struct radix_mask *, sizeof (*(m))); }\ 101 102 #define MKFree(m) { (m)->rm_mklist = rn_mkfreelist; rn_mkfreelist = (m);} 103 104 struct radix_node_head { 105 struct radix_node *rnh_treetop; 106 int rnh_addrsize; /* permit, but not require fixed keys */ 107 int rnh_pktsize; /* permit, but not require fixed keys */ 108 struct radix_node *(*rnh_addaddr) /* add based on sockaddr */ 109 __P((void *v, void *mask, 110 struct radix_node_head *head, struct radix_node nodes[])); 111 struct radix_node *(*rnh_addpkt) /* add based on packet hdr */ 112 __P((void *v, void *mask, 113 struct radix_node_head *head, struct radix_node nodes[])); 114 struct radix_node *(*rnh_deladdr) /* remove based on sockaddr */ 115 __P((void *v, void *mask, struct radix_node_head *head)); 116 struct radix_node *(*rnh_delpkt) /* remove based on packet hdr */ 117 __P((void *v, void *mask, struct radix_node_head *head)); 118 struct radix_node *(*rnh_matchaddr) /* locate based on sockaddr */ 119 __P((void *v, struct radix_node_head *head)); 120 struct radix_node *(*rnh_lookup) /* locate based on sockaddr */ 121 __P((void *v, void *mask, struct radix_node_head *head)); 122 struct radix_node *(*rnh_matchpkt) /* locate based on packet hdr */ 123 __P((void *v, struct radix_node_head *head)); 124 int (*rnh_walktree) /* traverse tree */ 125 __P((struct radix_node_head *, 126 int (*)(struct radix_node *, void *), void *)); 127 struct radix_node rnh_nodes[3]; /* empty tree for common case */ 128 }; 129 130 131 #ifdef _KERNEL 132 #define Bcmp(a, b, n) bcmp(((caddr_t)(a)), ((caddr_t)(b)), (unsigned)(n)) 133 #define Bcopy(a, b, n) bcopy(((caddr_t)(a)), ((caddr_t)(b)), (unsigned)(n)) 134 #define Bzero(p, n) bzero((caddr_t)(p), (unsigned)(n)); 135 #define R_Malloc(p, t, n) (p = (t) malloc((unsigned long)(n), M_RTABLE, M_DONTWAIT)) 136 #define Free(p) free((caddr_t)p, M_RTABLE); 137 #endif /*_KERNEL*/ 138 139 void rn_init __P((void)); 140 int rn_inithead __P((void **, int)); 141 int rn_inithead0 __P((struct radix_node_head *, int)); 142 int rn_refines __P((void *, void *)); 143 int rn_walktree __P((struct radix_node_head *, 144 int (*)(struct radix_node *, void *), void *)); 145 struct radix_node 146 *rn_addmask __P((void *, int, int)), 147 *rn_addroute __P((void *, void *, struct radix_node_head *, 148 struct radix_node [2])), 149 *rn_delete __P((void *, void *, struct radix_node_head *)), 150 *rn_insert __P((void *, struct radix_node_head *, int *, 151 struct radix_node [2])), 152 *rn_lookup __P((void *, void *, struct radix_node_head *)), 153 *rn_match __P((void *, struct radix_node_head *)), 154 *rn_newpair __P((void *, int, struct radix_node[2])), 155 *rn_search __P((void *, struct radix_node *)), 156 *rn_search_m __P((void *, struct radix_node *, void *)); 157 158 #endif /* _NET_RADIX_H_ */ 159