iter_hints.h

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/*
 * iterator/iter_hints.h - iterative resolver module stub and root hints.
 *
 * Copyright (c) 2007, NLnet Labs. All rights reserved.
 *
 * This software is open source.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * 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.
 * 
 * Neither the name of the NLNET LABS 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 COPYRIGHT HOLDERS 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 COPYRIGHT
 * HOLDER 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.
 */

 
#ifndef ITERATOR_ITER_HINTS_H
#define ITERATOR_ITER_HINTS_H
#include "util/storage/dnstree.h"
struct iter_env;
struct config_file;
struct delegpt;

struct iter_hints {
    rbtree_type tree;
};

struct iter_hints_stub {
    struct name_tree_node node;
    struct delegpt* dp;
    uint8_t noprime;
};

struct iter_hints* hints_create(void);

void hints_delete(struct iter_hints* hints);

int hints_apply_cfg(struct iter_hints* hints, struct config_file* cfg);

struct delegpt* hints_lookup_root(struct iter_hints* hints, uint16_t qclass);

int hints_next_root(struct iter_hints* hints, uint16_t* qclass);

struct iter_hints_stub* hints_lookup_stub(struct iter_hints* hints, 
    uint8_t* qname, uint16_t qclass, struct delegpt* dp);

size_t hints_get_mem(struct iter_hints* hints);

int hints_add_stub(struct iter_hints* hints, uint16_t c, struct delegpt* dp,
    int noprime);

void hints_delete_stub(struct iter_hints* hints, uint16_t c, uint8_t* nm);
 
#endif /* ITERATOR_ITER_HINTS_H */