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-/* tree.h
-
- Definitions for address trees... */
-
-/*
- * Copyright (c) 1995 The Internet Software Consortium. 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 Internet Software Consortium 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 INTERNET SOFTWARE CONSORTIUM 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 INTERNET SOFTWARE CONSORTIUM 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.
- *
- * This software has been written for the Internet Software Consortium
- * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
- * Enterprises. To learn more about the Internet Software Consortium,
- * see ``http://www.vix.com/isc''. To learn more about Vixie
- * Enterprises, see ``http://www.vix.com''.
- */
-
-/* A pair of pointers, suitable for making a linked list. */
-typedef struct _pair {
- caddr_t car;
- struct _pair *cdr;
-} *pair;
-
-/* Tree node types... */
-#define TREE_CONCAT 1
-#define TREE_HOST_LOOKUP 2
-#define TREE_CONST 3
-#define TREE_LIMIT 4
-
-/* Tree structure for deferred evaluation of changing values. */
-struct tree {
- int op;
- union {
- struct concat {
- struct tree *left;
- struct tree *right;
- } concat;
- struct host_lookup {
- struct dns_host_entry *host;
- } host_lookup;
- struct const_val {
- unsigned char *data;
- int len;
- } const_val;
- struct limit {
- struct tree *tree;
- int limit;
- } limit;
- } data;
-};
-
-/* DNS host entry structure... */
-struct dns_host_entry {
- char *hostname;
- unsigned char *data;
- int data_len;
- int buf_len;
- TIME timeout;
-};
-
-struct tree_cache {
- unsigned char *value;
- int len;
- int buf_size;
- TIME timeout;
- struct tree *tree;
-};
-
-struct universe {
- char *name;
- struct hash_table *hash;
- struct option *options [256];
-};
-
-struct option {
- char *name;
- char *format;
- struct universe *universe;
- unsigned char code;
-};