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/* Copyright (c) 2014, Vsevolod Stakhov
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED ''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 AUTHOR 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 PARSE_H_
#define PARSE_H_
#include "dns_private.h"
/**
* Compare request and reply checking names
* @param req request object
* @param in incoming packet
* @param len length of the incoming packet
* @return new position in the incoming packet or NULL if request is not equal to reply
*/
uint8_t * rdns_request_reply_cmp (struct rdns_request *req, uint8_t *in, int len);
/**
* Parse labels in the packet
* @param in incoming packet
* @param target target to write the parsed label (out)
* @param pos output position in the packet (it/out)
* @param rep dns reply
* @param remain remaining bytes (in/out)
* @param make_name create name or just skip to the next label
* @return true if a label has been successfully parsed
*/
bool rdns_parse_labels (struct rdns_resolver *resolver,
uint8_t *in, char **target,
uint8_t **pos, struct rdns_reply *rep,
int *remain, bool make_name);
/**
* Parse resource record
* @param in incoming packet
* @param elt new reply entry
* @param pos output position in the packet (it/out)
* @param rep dns reply
* @param remain remaining bytes (in/out)
* @return 1 if rr has been parsed, 0 if rr has been skipped and -1 if there was a parsing error
*/
int rdns_parse_rr (struct rdns_resolver *resolver,
uint8_t *in, struct rdns_reply_entry *elt, uint8_t **pos,
struct rdns_reply *rep, int *remain);
#endif /* PARSE_H_ */
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