108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
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/* tree.h
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Definitions for address trees... */
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/*
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* Copyright (c) 1995 The Internet Software Consortium. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of The Internet Software Consortium nor the names
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* of its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
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* CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This software has been written for the Internet Software Consortium
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* by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
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* Enterprises. To learn more about the Internet Software Consortium,
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* see ``http://www.vix.com/isc''. To learn more about Vixie
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* Enterprises, see ``http://www.vix.com''.
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*/
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/* A pair of pointers, suitable for making a linked list. */
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typedef struct _pair {
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caddr_t car;
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struct _pair *cdr;
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} *pair;
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/* Tree node types... */
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#define TREE_CONCAT 1
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#define TREE_HOST_LOOKUP 2
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#define TREE_CONST 3
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#define TREE_LIMIT 4
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/* Tree structure for deferred evaluation of changing values. */
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struct tree {
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int op;
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union {
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struct concat {
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struct tree *left;
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struct tree *right;
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} concat;
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struct host_lookup {
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struct dns_host_entry *host;
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} host_lookup;
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struct const_val {
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unsigned char *data;
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int len;
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} const_val;
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struct limit {
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struct tree *tree;
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int limit;
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} limit;
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} data;
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};
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/* DNS host entry structure... */
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struct dns_host_entry {
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char *hostname;
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unsigned char *data;
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int data_len;
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int buf_len;
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TIME timeout;
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};
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struct tree_cache {
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unsigned char *value;
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int len;
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int buf_size;
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TIME timeout;
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struct tree *tree;
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int flags;
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#define TC_AWAITING_RESOLUTION 1
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#define TC_TEMPORARY 2
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};
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struct universe {
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char *name;
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struct hash_table *hash;
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struct option *options [256];
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};
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struct option {
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char *name;
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char *format;
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struct universe *universe;
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unsigned char code;
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};
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