/usr/include/ldns/host2wire.h is in libldns-dev 1.6.17-1ubuntu0.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* host2wire.h - 2wire conversion routines
*
* a Net::DNS like library for C
*
* (c) NLnet Labs, 2005-2006
*
* See the file LICENSE for the license
*/
/**
* \file
*
* Contains all functions to translate the main structures to wire format
*/
#ifndef LDNS_HOST2WIRE_H
#define LDNS_HOST2WIRE_H
#include <ldns/common.h>
#include <ldns/error.h>
#include <ldns/rr.h>
#include <ldns/rdata.h>
#include <ldns/packet.h>
#include <ldns/buffer.h>
#include <ctype.h>
#include "ldns/util.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* Copies the dname data to the buffer in wire format
* \param[out] *buffer buffer to append the result to
* \param[in] *name rdata dname to convert
* \return ldns_status
*/
ldns_status ldns_dname2buffer_wire(ldns_buffer *buffer, const ldns_rdf *name);
/**
* Copies the rdata data to the buffer in wire format
* \param[out] *output buffer to append the result to
* \param[in] *rdf rdata to convert
* \return ldns_status
*/
ldns_status ldns_rdf2buffer_wire(ldns_buffer *output, const ldns_rdf *rdf);
/**
* Copies the rdata data to the buffer in wire format
* If the rdata is a dname, the letters will be lowercased
* during the conversion
* \param[out] *output buffer to append the result to
* \param[in] *rdf rdata to convert
* \return ldns_status
*/
ldns_status ldns_rdf2buffer_wire_canonical(ldns_buffer *output,
const ldns_rdf *rdf);
/**
* Copies the rr data to the buffer in wire format
* \param[out] *output buffer to append the result to
* \param[in] *rr resource record to convert
* \param[in] section the section in the packet this rr is supposed to be in
* (to determine whether to add rdata or not)
* \return ldns_status
*/
ldns_status ldns_rr2buffer_wire(ldns_buffer *output,
const ldns_rr *rr,
int section);
/**
* Copies the rr data to the buffer in wire format, in canonical format
* according to RFC3597 (every dname in rdata fields of RR's mentioned in
* that RFC will be lowercased)
* \param[out] *output buffer to append the result to
* \param[in] *rr resource record to convert
* \param[in] section the section in the packet this rr is supposed to be in
* (to determine whether to add rdata or not)
* \return ldns_status
*/
ldns_status ldns_rr2buffer_wire_canonical(ldns_buffer *output,
const ldns_rr *rr,
int section);
/**
* Converts a rrsig to wireformat BUT EXCLUDE the rrsig rdata
* This is needed in DNSSEC verification
* \param[out] output buffer to append the result to
* \param[in] sigrr signature rr to operate on
* \return ldns_status
*/
ldns_status ldns_rrsig2buffer_wire(ldns_buffer *output, const ldns_rr *sigrr);
/**
* Converts an rr's rdata to wireformat, while excluding
* the ownername and all the stuff before the rdata.
* This is needed in DNSSEC keytag calculation, the ds
* calcalution from the key and maybe elsewhere.
*
* \param[out] *output buffer where to put the result
* \param[in] *rr rr to operate on
* \return ldns_status
*/
ldns_status ldns_rr_rdata2buffer_wire(ldns_buffer *output, const ldns_rr *rr);
/**
* Copies the packet data to the buffer in wire format
* \param[out] *output buffer to append the result to
* \param[in] *pkt packet to convert
* \return ldns_status
*/
ldns_status ldns_pkt2buffer_wire(ldns_buffer *output, const ldns_pkt *pkt);
/**
* Copies the rr_list data to the buffer in wire format
* \param[out] *output buffer to append the result to
* \param[in] *rrlist rr_list to to convert
* \return ldns_status
*/
ldns_status ldns_rr_list2buffer_wire(ldns_buffer *output, const ldns_rr_list *rrlist);
/**
* Allocates an array of uint8_t at dest, and puts the wireformat of the
* given rdf in that array. The result_size value contains the
* length of the array, if it succeeds, and 0 otherwise (in which case
* the function also returns NULL)
*
* \param[out] dest pointer to the array of bytes to be created
* \param[in] rdf the rdata field to convert
* \param[out] size the size of the converted result
*/
ldns_status ldns_rdf2wire(uint8_t **dest, const ldns_rdf *rdf, size_t *size);
/**
* Allocates an array of uint8_t at dest, and puts the wireformat of the
* given rr in that array. The result_size value contains the
* length of the array, if it succeeds, and 0 otherwise (in which case
* the function also returns NULL)
*
* If the section argument is LDNS_SECTION_QUESTION, data like ttl and rdata
* are not put into the result
*
* \param[out] dest pointer to the array of bytes to be created
* \param[in] rr the rr to convert
* \param[out] size the size of the converted result
*/
ldns_status ldns_rr2wire(uint8_t **dest, const ldns_rr *rr, int, size_t *size);
/**
* Allocates an array of uint8_t at dest, and puts the wireformat of the
* given packet in that array. The result_size value contains the
* length of the array, if it succeeds, and 0 otherwise (in which case
* the function also returns NULL)
*/
ldns_status ldns_pkt2wire(uint8_t **dest, const ldns_pkt *p, size_t *size);
#ifdef __cplusplus
}
#endif
#endif /* LDNS_HOST2WIRE_H */
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