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