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/*
* Copyright (C) 2012 Reto Guadagnini
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <resolver/rr.h>
#include <library.h>
#include <utils/debug.h>
#include <stdlib.h>
#include <string.h>
#include "unbound_rr.h"
typedef struct private_unbound_rr_t private_unbound_rr_t;
/**
* private data of an unbound_rr_t object.
*/
struct private_unbound_rr_t {
/**
* Public data
*/
unbound_rr_t public;
/**
* Owner name
*/
char* name;
/**
* Type
*/
rr_type_t type;
/**
* Class
*/
rr_class_t class;
/**
* TTL
*/
uint32_t ttl;
/**
* Size of the rdata field in octets
*/
uint16_t size;
/**
* RDATA field (array of bytes in network order)
*/
u_char *rdata;
};
METHOD(rr_t, get_name, char *,
private_unbound_rr_t *this)
{
return this->name;
}
METHOD(rr_t, get_type, rr_type_t,
private_unbound_rr_t *this)
{
return this->type;
}
METHOD(rr_t, get_class, rr_class_t,
private_unbound_rr_t *this)
{
return this->class;
}
METHOD(rr_t, get_ttl, uint32_t,
private_unbound_rr_t *this)
{
return this->ttl;
}
METHOD(rr_t, get_rdata, chunk_t,
private_unbound_rr_t *this)
{
return chunk_create(this->rdata, this->size);
}
METHOD(rr_t, destroy, void,
private_unbound_rr_t *this)
{
free(this->name);
free(this->rdata);
free(this);
}
/*
* Described in header.
*/
unbound_rr_t *unbound_rr_create_frm_ldns_rr(ldns_rr *rr)
{
private_unbound_rr_t *this;
ldns_status status;
ldns_buffer *buf;
int i;
INIT(this,
.public = {
.interface = {
.get_name = _get_name,
.get_type = _get_type,
.get_class = _get_class,
.get_ttl = _get_ttl,
.get_rdata = _get_rdata,
.destroy = _destroy,
},
},
);
this->name = ldns_rdf2str(ldns_rr_owner(rr));
if (!this->name)
{
DBG1(DBG_LIB, "failed to parse the owner name of a DNS RR");
_destroy(this);
return NULL;
}
this->type = (rr_type_t)ldns_rr_get_type(rr);
this->class = (rr_class_t)ldns_rr_get_class(rr);
this->ttl = ldns_rr_ttl(rr);
for(i = 0; i < ldns_rr_rd_count(rr); i++)
{
this->size += ldns_rdf_size(ldns_rr_rdf(rr, i));
}
/**
* The ldns library splits the RDATA field of a RR in various rdf.
* Here we reassemble these rdf to get the RDATA field of the RR.
*/
buf = ldns_buffer_new(LDNS_MIN_BUFLEN);
/* The buffer will be resized automatically by ldns_rr_rdata2buffer_wire() */
status = ldns_rr_rdata2buffer_wire(buf, rr);
if (status != LDNS_STATUS_OK)
{
DBG1(DBG_LIB, "failed to get the RDATA field of a DNS RR");
ldns_buffer_free(buf);
_destroy(this);
return NULL;
}
this->rdata = ldns_buffer_export(buf);
ldns_buffer_free(buf);
return &this->public;
}
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