/*
* rdata.h -- RDATA conversion functions.
*
* Copyright (c) 2001-2006, NLnet Labs. All rights reserved.
*
* See LICENSE for the license.
*
*/

#ifndef RDATA_H
#define RDATA_H

#include "dns.h"
#include "namedb.h"

/* High bit of the APL length field is the negation bit.  */
#define APL_NEGATION_MASK      0x80U
#define APL_LENGTH_MASK        (~APL_NEGATION_MASK)

extern lookup_table_type dns_certificate_types[];
extern lookup_table_type dns_algorithms[];
extern const char *svcparamkey_strs[];

int rdata_atom_to_string(buffer_type *output, rdata_zoneformat_type type,
                        rdata_atom_type rdata, rr_type *rr);

/*
* Split the wireformat RDATA into an array of rdata atoms. Domain
* names are inserted into the OWNERS table. The number of rdata atoms
* is returned and the array itself is allocated in REGION and stored
* in RDATAS.
*
* Returns -1 on failure.
*/
ssize_t rdata_wireformat_to_rdata_atoms(region_type *region,
                                       domain_table_type *owners,
                                       uint16_t rrtype,
                                       uint16_t rdata_size,
                                       buffer_type *packet,
                                       rdata_atom_type **rdatas);

/*
* Calculate the maximum size of the rdata assuming domain names are
* not compressed.
*/
size_t rdata_maximum_wireformat_size(rrtype_descriptor_type *descriptor,
                                    size_t rdata_count,
                                    rdata_atom_type *rdatas);

int rdata_atoms_to_unknown_string(buffer_type *out,
                                 rrtype_descriptor_type *descriptor,
                                 size_t rdata_count,
                                 rdata_atom_type *rdatas);

/* print rdata to a text string (as for a zone file) returns 0
 on a failure (bufpos is reset to original position).
 returns 1 on success, bufpos is moved. */
int print_rdata(buffer_type *output, rrtype_descriptor_type *descriptor,
           rr_type *record);

#endif /* RDATA_H */