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// Copyright (C) 2010-2015 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 <string>
#include <util/buffer.h>
#include <dns/name.h>
#include <dns/messagerenderer.h>
#include <dns/rdata.h>
#include <dns/rdataclass.h>
#include <dns/rdata/generic/detail/lexer_util.h>
using namespace std;
using namespace isc::util;
using isc::dns::rdata::generic::detail::createNameFromLexer;
// BEGIN_ISC_NAMESPACE
// BEGIN_RDATA_NAMESPACE
/// \brief Constructor from string.
///
/// The given string must represent a valid CNAME RDATA. There can be extra
/// space characters at the beginning or end of the text (which are simply
/// ignored), but other extra text, including a new line, will make the
/// construction fail with an exception.
///
/// The CNAME must be absolute since there's no parameter that specifies
/// the origin name; if it is not absolute, \c MissingNameOrigin
/// exception will be thrown. These must not be represented as a quoted
/// string.
///
/// \throw Others Exception from the Name and RRTTL constructors.
/// \throw InvalidRdataText Other general syntax errors.
CNAME::CNAME(const std::string& namestr) :
// Fill in dummy name and replace it soon below.
cname_(Name::ROOT_NAME())
{
try {
std::istringstream ss(namestr);
MasterLexer lexer;
lexer.pushSource(ss);
cname_ = createNameFromLexer(lexer, NULL);
if (lexer.getNextToken().getType() != MasterToken::END_OF_FILE) {
isc_throw(InvalidRdataText, "extra input text for CNAME: "
<< namestr);
}
} catch (const MasterLexer::LexerError& ex) {
isc_throw(InvalidRdataText, "Failed to construct CNAME from '" <<
namestr << "': " << ex.what());
}
}
CNAME::CNAME(InputBuffer& buffer, size_t) :
Rdata(), cname_(buffer)
{
// we don't need rdata_len for parsing. if necessary, the caller will
// check consistency.
}
/// \brief Constructor with a context of MasterLexer.
///
/// The \c lexer should point to the beginning of valid textual
/// representation of a CNAME RDATA. The CNAME field can be
/// non-absolute if \c origin is non-NULL, in which case \c origin is
/// used to make it absolute. It must not be represented as a quoted
/// string.
///
/// \throw MasterLexer::LexerError General parsing error such as missing field.
/// \throw Other Exceptions from the Name and RRTTL constructors if
/// construction of textual fields as these objects fail.
///
/// \param lexer A \c MasterLexer object parsing a master file for the
/// RDATA to be created
/// \param origin If non NULL, specifies the origin of CNAME when it
/// is non-absolute.
CNAME::CNAME(MasterLexer& lexer, const Name* origin,
MasterLoader::Options, MasterLoaderCallbacks&) :
cname_(createNameFromLexer(lexer, origin))
{}
CNAME::CNAME(const CNAME& other) :
Rdata(), cname_(other.cname_)
{}
CNAME::CNAME(const Name& cname) :
cname_(cname)
{}
void
CNAME::toWire(OutputBuffer& buffer) const {
cname_.toWire(buffer);
}
void
CNAME::toWire(AbstractMessageRenderer& renderer) const {
renderer.writeName(cname_);
}
string
CNAME::toText() const {
return (cname_.toText());
}
int
CNAME::compare(const Rdata& other) const {
const CNAME& other_cname = dynamic_cast<const CNAME&>(other);
return (compareNames(cname_, other_cname.cname_));
}
const Name&
CNAME::getCname() const {
return (cname_);
}
// END_RDATA_NAMESPACE
// END_ISC_NAMESPACE
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