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// Copyright (C) 2010 Internet Systems Consortium, Inc. ("ISC")
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.
// $Id$
#include <iostream>
#include <string>
#include <sstream>
#include <vector>
#include <boost/lexical_cast.hpp>
#include <dns/buffer.h>
#include <dns/hex.h>
#include <dns/messagerenderer.h>
#include <dns/name.h>
#include <dns/rdata.h>
#include <dns/rdataclass.h>
#include <stdio.h>
#include <time.h>
using namespace std;
// BEGIN_ISC_NAMESPACE
// BEGIN_RDATA_NAMESPACE
struct DSImpl {
// straightforward representation of DS RDATA fields
DSImpl(uint16_t tag, uint8_t algorithm, uint8_t digest_type,
const vector<uint8_t>& digest) :
tag_(tag), algorithm_(algorithm), digest_type_(digest_type),
digest_(digest)
{}
uint16_t tag_;
uint8_t algorithm_;
uint8_t digest_type_;
const vector<uint8_t> digest_;
};
DS::DS(const string& ds_str) :
impl_(NULL)
{
istringstream iss(ds_str);
unsigned int tag, algorithm, digest_type;
stringbuf digestbuf;
iss >> tag >> algorithm >> digest_type >> &digestbuf;
if (iss.bad() || iss.fail()) {
isc_throw(InvalidRdataText, "Invalid DS text");
}
if (tag > 0xffff) {
isc_throw(InvalidRdataText, "DS tag out of range");
}
if (algorithm > 0xff) {
isc_throw(InvalidRdataText, "DS algorithm out of range");
}
if (digest_type > 0xff) {
isc_throw(InvalidRdataText, "DS digest type out of range");
}
vector<uint8_t> digest;
decodeHex(digestbuf.str(), digest);
impl_ = new DSImpl(tag, algorithm, digest_type, digest);
}
DS::DS(InputBuffer& buffer, size_t rdata_len)
{
if (rdata_len < 4) {
isc_throw(InvalidRdataLength, "DS too short");
}
uint16_t tag = buffer.readUint16();
uint16_t algorithm = buffer.readUint8();
uint16_t digest_type = buffer.readUint8();
rdata_len -= 4;
vector<uint8_t> digest(rdata_len);
buffer.readData(&digest[0], rdata_len);
impl_ = new DSImpl(tag, algorithm, digest_type, digest);
}
DS::DS(const DS& source) :
Rdata(), impl_(new DSImpl(*source.impl_))
{}
DS&
DS::operator=(const DS& source)
{
if (impl_ == source.impl_) {
return (*this);
}
DSImpl* newimpl = new DSImpl(*source.impl_);
delete impl_;
impl_ = newimpl;
return (*this);
}
DS::~DS()
{
delete impl_;
}
string
DS::toText() const
{
using namespace boost;
return (lexical_cast<string>(static_cast<int>(impl_->tag_)) +
" " + lexical_cast<string>(static_cast<int>(impl_->algorithm_)) +
" " + lexical_cast<string>(static_cast<int>(impl_->digest_type_)) +
" " + encodeHex(impl_->digest_));
}
void
DS::toWire(OutputBuffer& buffer) const
{
buffer.writeUint16(impl_->tag_);
buffer.writeUint8(impl_->algorithm_);
buffer.writeUint8(impl_->digest_type_);
buffer.writeData(&impl_->digest_[0], impl_->digest_.size());
}
void
DS::toWire(MessageRenderer& renderer) const
{
renderer.writeUint16(impl_->tag_);
renderer.writeUint8(impl_->algorithm_);
renderer.writeUint8(impl_->digest_type_);
renderer.writeData(&impl_->digest_[0], impl_->digest_.size());
}
int
DS::compare(const Rdata& other) const
{
const DS& other_ds = dynamic_cast<const DS&>(other);
if (impl_->tag_ != other_ds.impl_->tag_) {
return (impl_->tag_ < other_ds.impl_->tag_ ? -1 : 1);
}
if (impl_->algorithm_ != other_ds.impl_->algorithm_) {
return (impl_->algorithm_ < other_ds.impl_->algorithm_ ? -1 : 1);
}
if (impl_->digest_type_ != other_ds.impl_->digest_type_) {
return (impl_->digest_type_ < other_ds.impl_->digest_type_ ? -1 : 1);
}
size_t this_len = impl_->digest_.size();
size_t other_len = other_ds.impl_->digest_.size();
size_t cmplen = min(this_len, other_len);
int cmp = memcmp(&impl_->digest_[0], &other_ds.impl_->digest_[0], cmplen);
if (cmp != 0) {
return (cmp);
} else {
return ((this_len == other_len) ? 0 : (this_len < other_len) ? -1 : 1);
}
}
uint16_t
DS::getTag() const {
return impl_->tag_;
}
// END_RDATA_NAMESPACE
// END_ISC_NAMESPACE
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