--- /dev/null
+/*-
+ * 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.
+ * 4. 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: head/sys/net/radix.h 185747 2008-12-07 21:15:43Z kmacy $
+ */
+
+#ifndef _RADIX_H_
+#define _RADIX_H_
+
+#ifdef _KERNEL
+#include <sys/_lock.h>
+#include <sys/_mutex.h>
+#include <sys/_rwlock.h>
+#endif
+
+#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 */
+
+typedef int walktree_f_t(struct radix_node *, void *);
+
+struct radix_node_head {
+ struct radix_node *rnh_treetop;
+ 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_deladdr) /* remove based on sockaddr */
+ (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);
+ 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 */
+ int rnh_multipath; /* multipath capable ? */
+#ifdef _KERNEL
+#if defined( __linux__ ) || defined( _WIN32 )
+ spinlock_t rnh_lock;
+#else
+ struct rwlock rnh_lock; /* locks entire radix tree */
+#endif /* !__linux__ */
+#endif
+};
+
+#ifndef _KERNEL
+#define R_Malloc(p, t, n) (p = (t) malloc((unsigned int)(n)))
+#define R_Zalloc(p, t, n) (p = (t) calloc(1,(unsigned int)(n)))
+#define Free(p) free((char *)p);
+#else
+#define R_Malloc(p, t, n) (p = (t) malloc((unsigned long)(n), M_RTABLE, M_NOWAIT))
+#define R_Zalloc(p, t, n) (p = (t) malloc((unsigned long)(n), M_RTABLE, M_NOWAIT | M_ZERO))
+#define Free(p) free((caddr_t)p, M_RTABLE);
+
+#define RADIX_NODE_HEAD_LOCK_INIT(rnh) \
+ rw_init_flags(&(rnh)->rnh_lock, "radix node head", 0)
+#define RADIX_NODE_HEAD_LOCK(rnh) rw_wlock(&(rnh)->rnh_lock)
+#define RADIX_NODE_HEAD_UNLOCK(rnh) rw_wunlock(&(rnh)->rnh_lock)
+#define RADIX_NODE_HEAD_RLOCK(rnh) rw_rlock(&(rnh)->rnh_lock)
+#define RADIX_NODE_HEAD_RUNLOCK(rnh) rw_runlock(&(rnh)->rnh_lock)
+#define RADIX_NODE_HEAD_LOCK_TRY_UPGRADE(rnh) rw_try_upgrade(&(rnh)->rnh_lock)
+
+
+#define RADIX_NODE_HEAD_DESTROY(rnh) rw_destroy(&(rnh)->rnh_lock)
+#define RADIX_NODE_HEAD_LOCK_ASSERT(rnh) rw_assert(&(rnh)->rnh_lock, RA_LOCKED)
+#define RADIX_NODE_HEAD_WLOCK_ASSERT(rnh) rw_assert(&(rnh)->rnh_lock, RA_WLOCKED)
+#endif /* _KERNEL */
+
+void rn_init(int);
+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_ */
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