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- /*
- * 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 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
- */
-
- #ifndef _NET_RADIX_H_
- #define _NET_RADIX_H_
-
- #ifndef EXEC_TYPES_H
- #include <exec/types.h>
- #endif /* EXEC_TYPES_H */
-
- /*
- * Radix search tree node layout.
- */
-
- struct radix_node {
- struct radix_mask *rn_mklist; /* list of masks contained in subtree */
- struct radix_node *rn_p; /* parent */
- WORD rn_b; /* bit offset; -1-index(netmask) */
- UBYTE rn_bmask; /* node: mask for bit test*/
- UBYTE 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: */
- APTR rn_Key; /* object of search */
- APTR rn_Mask; /* netmask, if present */
- struct radix_node *rn_Dupedkey;
- } rn_leaf;
- struct { /* node only data: */
- LONG rn_Off; /* where to start compare */
- struct radix_node *rn_L;/* progeny */
- struct radix_node *rn_R;/* progeny */
- } rn_node;
- } rn_u;
- };
-
- #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_off rn_u.rn_node.rn_Off
- #define rn_l rn_u.rn_node.rn_L
- #define rn_r rn_u.rn_node.rn_R
-
- /*
- * Annotations to tree concerning potential routes applying to subtrees.
- */
-
- struct radix_mask {
- WORD rm_b; /* bit offset; -1-index(netmask) */
- UBYTE rm_unused; /* cf. rn_bmask */
- UBYTE rm_flags; /* cf. rn_flags */
- struct radix_mask *rm_mklist; /* more masks to try */
- union {
- APTR rmu_mask; /* the mask */
- struct radix_node *rmu_leaf; /* for normal routes */
- } rm_rmu;
- LONG 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 */
-
- struct radix_node_head {
- struct radix_node *rnh_treetop;
- LONG rnh_addrsize; /* permit, but not require fixed keys */
- LONG rnh_pktsize; /* permit, but not require fixed keys */
- APTR rnh_addaddr; /* add based on sockaddr */
- APTR rnh_addpkt; /* add based on packet hdr */
- APTR rnh_deladdr; /* remove based on sockaddr */
- APTR rnh_delpkt; /* remove based on packet hdr */
- APTR rnh_matchaddr; /* locate based on sockaddr */
- APTR rnh_lookup; /* locate based on sockaddr */
- APTR rnh_matchpkt; /* locate based on packet hdr */
- APTR rnh_walktree; /* traverse tree */
- struct radix_node rnh_nodes[3]; /* empty tree for common case */
- };
-
- #endif /* _NET_RADIX_H_ */
-