1 /* $OpenBSD: radix.h,v 1.15 2008/11/07 19:09:03 deraadt Exp $ */ 2 /* $NetBSD: radix.h,v 1.8 1996/02/13 22:00:37 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1988, 1989, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)radix.h 8.2 (Berkeley) 10/31/94 33 */ 34 35 #ifndef _NET_RADIX_H_ 36 #define _NET_RADIX_H_ 37 38 /* 39 * Radix search tree node layout. 40 */ 41 42 struct radix_node { 43 struct radix_mask *rn_mklist; /* list of masks contained in subtree */ 44 struct radix_node *rn_p; /* parent */ 45 short rn_b; /* bit offset; -1-index(netmask) */ 46 char rn_bmask; /* node: mask for bit test*/ 47 u_char rn_flags; /* enumerated next */ 48 #define RNF_NORMAL 1 /* leaf contains normal route */ 49 #define RNF_ROOT 2 /* leaf is root leaf for tree */ 50 #define RNF_ACTIVE 4 /* This node is alive (for rtfree) */ 51 union { 52 struct { /* leaf only data: */ 53 caddr_t rn_Key; /* object of search */ 54 caddr_t rn_Mask; /* netmask, if present */ 55 struct radix_node *rn_Dupedkey; 56 } rn_leaf; 57 struct { /* node only data: */ 58 int rn_Off; /* where to start compare */ 59 struct radix_node *rn_L;/* progeny */ 60 struct radix_node *rn_R;/* progeny */ 61 } rn_node; 62 } rn_u; 63 #ifdef RN_DEBUG 64 int rn_info; 65 struct radix_node *rn_twin; 66 struct radix_node *rn_ybro; 67 #endif 68 }; 69 70 #define rn_dupedkey rn_u.rn_leaf.rn_Dupedkey 71 #define rn_key rn_u.rn_leaf.rn_Key 72 #define rn_mask rn_u.rn_leaf.rn_Mask 73 #define rn_off rn_u.rn_node.rn_Off 74 #define rn_l rn_u.rn_node.rn_L 75 #define rn_r rn_u.rn_node.rn_R 76 77 /* 78 * Annotations to tree concerning potential routes applying to subtrees. 79 */ 80 81 extern struct radix_mask { 82 short rm_b; /* bit offset; -1-index(netmask) */ 83 char rm_unused; /* cf. rn_bmask */ 84 u_char rm_flags; /* cf. rn_flags */ 85 struct radix_mask *rm_mklist; /* more masks to try */ 86 union { 87 caddr_t rmu_mask; /* the mask */ 88 struct radix_node *rmu_leaf; /* for normal routes */ 89 } rm_rmu; 90 int rm_refs; /* # of references to this struct */ 91 } *rn_mkfreelist; 92 93 #define rm_mask rm_rmu.rmu_mask 94 #define rm_leaf rm_rmu.rmu_leaf /* extra field would make 32 bytes */ 95 96 #define MKGet(m) do { \ 97 if (rn_mkfreelist) { \ 98 m = rn_mkfreelist; \ 99 rn_mkfreelist = (m)->rm_mklist; \ 100 } else \ 101 R_Malloc(m, struct radix_mask *, sizeof (*(m))); \ 102 } while (0) 103 104 #define MKFree(m) do { \ 105 (m)->rm_mklist = rn_mkfreelist; \ 106 rn_mkfreelist = (m); \ 107 } while (0) 108 109 struct radix_node_head { 110 struct radix_node *rnh_treetop; 111 int rnh_addrsize; /* permit, but not require fixed keys */ 112 int rnh_pktsize; /* permit, but not require fixed keys */ 113 /* add based on sockaddr */ 114 struct radix_node *(*rnh_addaddr)(void *v, void *mask, 115 struct radix_node_head *head, struct radix_node nodes[], 116 u_int8_t prio); 117 /* remove based on sockaddr */ 118 struct radix_node *(*rnh_deladdr)(void *v, void *mask, 119 struct radix_node_head *head, struct radix_node *rn); 120 /* locate based on sockaddr */ 121 struct radix_node *(*rnh_matchaddr)(void *v, 122 struct radix_node_head *head); 123 /* locate based on sockaddr */ 124 struct radix_node *(*rnh_lookup)(void *v, void *mask, 125 struct radix_node_head *head); 126 /* traverse tree */ 127 int (*rnh_walktree)(struct radix_node_head *, 128 int (*)(struct radix_node *, void *), void *); 129 struct radix_node rnh_nodes[3];/* empty tree for common case */ 130 int rnh_multipath; /* multipath? */ 131 }; 132 133 #ifdef _KERNEL 134 #define Bcmp(a, b, n) bcmp(((caddr_t)(a)), ((caddr_t)(b)), (unsigned)(n)) 135 #define Bcopy(a, b, n) bcopy(((caddr_t)(a)), ((caddr_t)(b)), (unsigned)(n)) 136 #define Bzero(p, n) bzero((caddr_t)(p), (unsigned)(n)); 137 #define R_Malloc(p, t, n) (p = (t) malloc((unsigned long)(n), M_RTABLE, M_DONTWAIT)) 138 #define Free(p) free((caddr_t)p, M_RTABLE); 139 140 void rn_init(void); 141 int rn_inithead(void **, int); 142 int rn_inithead0(struct radix_node_head *, int); 143 int rn_refines(void *, void *); 144 int rn_walktree(struct radix_node_head *, 145 int (*)(struct radix_node *, void *), void *); 146 147 struct radix_node *rn_addmask(void *, int, int); 148 struct radix_node *rn_addroute(void *, void *, struct radix_node_head *, 149 struct radix_node [2], u_int8_t); 150 struct radix_node *rn_delete(void *, void *, struct radix_node_head *, 151 struct radix_node *); 152 struct radix_node *rn_insert(void *, struct radix_node_head *, int *, 153 struct radix_node [2]); 154 struct radix_node *rn_lookup(void *, void *, struct radix_node_head *); 155 struct radix_node *rn_match(void *, struct radix_node_head *); 156 struct radix_node *rn_newpair(void *, int, struct radix_node[2]); 157 struct radix_node *rn_search(void *, struct radix_node *); 158 struct radix_node *rn_search_m(void *, struct radix_node *, void *); 159 #endif /* _KERNEL */ 160 #endif /* _NET_RADIX_H_ */ 161