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// Copyright (C) 2011-2015 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include <config.h>
#include <dns/name.h>
#include <dns/messagerenderer.h>
#include <dns/rdata.h>
#include <dns/rdataclass.h>
#include <dns/rdata/generic/detail/char_string.h>
#include <exceptions/exceptions.h>
#include <string>
#include <boost/lexical_cast.hpp>
using namespace std;
using boost::lexical_cast;
using namespace isc::util;
using namespace isc::dns;
// BEGIN_ISC_NAMESPACE
// BEGIN_RDATA_NAMESPACE
class NAPTRImpl {
public:
NAPTRImpl() : order(0), preference(0), replacement(".") {}
NAPTRImpl(InputBuffer& buffer, size_t rdata_len) : replacement(".") {
if (rdata_len < 4 || buffer.getLength() - buffer.getPosition() < 4) {
isc_throw(isc::dns::DNSMessageFORMERR, "Error in parsing "
"NAPTR RDATA wire format: insufficient length ");
}
order = buffer.readUint16();
preference = buffer.readUint16();
rdata_len -= 4;
rdata_len -= detail::bufferToCharString(buffer, rdata_len, flags);
rdata_len -= detail::bufferToCharString(buffer, rdata_len, services);
rdata_len -= detail::bufferToCharString(buffer, rdata_len, regexp);
replacement = Name(buffer);
if (rdata_len < 1) {
isc_throw(isc::dns::DNSMessageFORMERR, "Error in parsing "
"NAPTR RDATA wire format: missing replacement name");
}
rdata_len -= replacement.getLength();
if (rdata_len != 0) {
isc_throw(isc::dns::DNSMessageFORMERR, "Error in parsing " <<
"NAPTR RDATA: bytes left at end: " <<
static_cast<int>(rdata_len));
}
}
NAPTRImpl(const std::string& naptr_str) : replacement(".") {
std::istringstream ss(naptr_str);
MasterLexer lexer;
lexer.pushSource(ss);
try {
parseNAPTRData(lexer);
// Should be at end of data now
if (lexer.getNextToken(MasterToken::QSTRING, true).getType() !=
MasterToken::END_OF_FILE) {
isc_throw(InvalidRdataText,
"Invalid NAPTR text format: too many fields.");
}
} catch (const MasterLexer::LexerError& ex) {
isc_throw(InvalidRdataText, "Failed to construct NAPTR RDATA from "
<< naptr_str << "': " << ex.what());
}
}
NAPTRImpl(MasterLexer& lexer) : replacement(".")
{
parseNAPTRData(lexer);
}
private:
void
parseNAPTRData(MasterLexer& lexer) {
MasterToken token = lexer.getNextToken(MasterToken::NUMBER);
if (token.getNumber() > 65535) {
isc_throw(InvalidRdataText,
"Invalid NAPTR text format: order out of range: "
<< token.getNumber());
}
order = token.getNumber();
token = lexer.getNextToken(MasterToken::NUMBER);
if (token.getNumber() > 65535) {
isc_throw(InvalidRdataText,
"Invalid NAPTR text format: preference out of range: "
<< token.getNumber());
}
preference = token.getNumber();
token = lexer.getNextToken(MasterToken::QSTRING);
stringToCharString(token.getStringRegion(), flags);
token = lexer.getNextToken(MasterToken::QSTRING);
stringToCharString(token.getStringRegion(), services);
token = lexer.getNextToken(MasterToken::QSTRING);
stringToCharString(token.getStringRegion(), regexp);
token = lexer.getNextToken(MasterToken::STRING);
replacement = Name(token.getString());
}
public:
uint16_t order;
uint16_t preference;
detail::CharString flags;
detail::CharString services;
detail::CharString regexp;
Name replacement;
};
NAPTR::NAPTR(InputBuffer& buffer, size_t rdata_len) :
impl_(new NAPTRImpl(buffer, rdata_len))
{}
NAPTR::NAPTR(const std::string& naptr_str) : impl_(new NAPTRImpl(naptr_str))
{}
NAPTR::NAPTR(MasterLexer& lexer, const Name*,
MasterLoader::Options, MasterLoaderCallbacks&) :
impl_(new NAPTRImpl(lexer))
{}
NAPTR::NAPTR(const NAPTR& naptr) : Rdata(),
impl_(new NAPTRImpl(*naptr.impl_))
{}
NAPTR&
NAPTR::operator=(const NAPTR& source)
{
impl_.reset(new NAPTRImpl(*source.impl_));
return (*this);
}
NAPTR::~NAPTR() {
}
void
NAPTR::toWire(OutputBuffer& buffer) const {
toWireHelper(buffer);
impl_->replacement.toWire(buffer);
}
void
NAPTR::toWire(AbstractMessageRenderer& renderer) const {
toWireHelper(renderer);
// Type NAPTR is not "well-known", and name compression must be disabled
// per RFC3597.
renderer.writeName(impl_->replacement, false);
}
string
NAPTR::toText() const {
string result;
result += lexical_cast<string>(impl_->order);
result += " ";
result += lexical_cast<string>(impl_->preference);
result += " \"";
result += detail::charStringToString(impl_->flags);
result += "\" \"";
result += detail::charStringToString(impl_->services);
result += "\" \"";
result += detail::charStringToString(impl_->regexp);
result += "\" ";
result += impl_->replacement.toText();
return (result);
}
int
NAPTR::compare(const Rdata& other) const {
const NAPTR other_naptr = dynamic_cast<const NAPTR&>(other);
if (impl_->order < other_naptr.impl_->order) {
return (-1);
} else if (impl_->order > other_naptr.impl_->order) {
return (1);
}
if (impl_->preference < other_naptr.impl_->preference) {
return (-1);
} else if (impl_->preference > other_naptr.impl_->preference) {
return (1);
}
const int fcmp = detail::compareCharStrings(impl_->flags,
other_naptr.impl_->flags);
if (fcmp != 0) {
return (fcmp);
}
const int scmp = detail::compareCharStrings(impl_->services,
other_naptr.impl_->services);
if (scmp != 0) {
return (scmp);
}
const int rcmp = detail::compareCharStrings(impl_->regexp,
other_naptr.impl_->regexp);
if (rcmp != 0) {
return (rcmp);
}
return (compareNames(impl_->replacement, other_naptr.impl_->replacement));
}
uint16_t
NAPTR::getOrder() const {
return (impl_->order);
}
uint16_t
NAPTR::getPreference() const {
return (impl_->preference);
}
const std::string
NAPTR::getFlags() const {
return (detail::charStringToString(impl_->flags));
}
const std::string
NAPTR::getServices() const {
return (detail::charStringToString(impl_->services));
}
const std::string
NAPTR::getRegexp() const {
return (detail::charStringToString(impl_->regexp));
}
const Name&
NAPTR::getReplacement() const {
return (impl_->replacement);
}
template <typename T>
void
NAPTR::toWireHelper(T& outputer) const {
outputer.writeUint16(impl_->order);
outputer.writeUint16(impl_->preference);
outputer.writeData(&impl_->flags[0], impl_->flags.size());
outputer.writeData(&impl_->services[0], impl_->services.size());
outputer.writeData(&impl_->regexp[0], impl_->regexp.size());
}
// END_RDATA_NAMESPACE
// END_ISC_NAMESPACE
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