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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 <string>
#include <sstream>
#include <util/buffer.h>
#include <dns/messagerenderer.h>
#include <dns/name.h>
#include <dns/rdata.h>
#include <dns/rdataclass.h>
#include <dns/rdata/generic/detail/lexer_util.h>
using namespace std;
using namespace isc::dns;
using namespace isc::util;
using isc::dns::rdata::generic::detail::createNameFromLexer;
// BEGIN_ISC_NAMESPACE
// BEGIN_RDATA_NAMESPACE
/// \brief Constructor from string.
///
/// \c minfo_str must be formatted as follows:
/// \code <rmailbox name> <emailbox name>
/// \endcode
/// where both fields must represent a valid domain name.
///
/// An example of valid string is:
/// \code "rmail.example.com. email.example.com." \endcode
///
/// \throw InvalidRdataText The number of RDATA fields (must be 2) is
/// incorrect.
/// \throw std::bad_alloc Memory allocation for names fails.
/// \throw Other The constructor of the \c Name class will throw if the
/// names in the string is invalid.
MINFO::MINFO(const std::string& minfo_str) :
// We cannot construct both names in the initialization list due to the
// necessary text processing, so we have to initialize them with a dummy
// name and replace them later.
rmailbox_(Name::ROOT_NAME()), emailbox_(Name::ROOT_NAME())
{
try {
std::istringstream ss(minfo_str);
MasterLexer lexer;
lexer.pushSource(ss);
rmailbox_ = createNameFromLexer(lexer, NULL);
emailbox_ = createNameFromLexer(lexer, NULL);
if (lexer.getNextToken().getType() != MasterToken::END_OF_FILE) {
isc_throw(InvalidRdataText, "extra input text for MINFO: "
<< minfo_str);
}
} catch (const MasterLexer::LexerError& ex) {
isc_throw(InvalidRdataText, "Failed to construct MINFO from '" <<
minfo_str << "': " << ex.what());
}
}
/// \brief Constructor with a context of MasterLexer.
///
/// The \c lexer should point to the beginning of valid textual representation
/// of an MINFO RDATA. The RMAILBOX and EMAILBOX fields can be non-absolute
/// if \c origin is non-NULL, in which case \c origin is used to make them
/// absolute.
///
/// \throw MasterLexer::LexerError General parsing error such as missing field.
/// \throw Other Exceptions from the Name and 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 SERVER when it
/// is non-absolute.
MINFO::MINFO(MasterLexer& lexer, const Name* origin,
MasterLoader::Options, MasterLoaderCallbacks&) :
rmailbox_(createNameFromLexer(lexer, origin)),
emailbox_(createNameFromLexer(lexer, origin))
{
}
/// \brief Constructor from wire-format data.
///
/// This constructor doesn't check the validity of the second parameter (rdata
/// length) for parsing.
/// If necessary, the caller will check consistency.
///
/// \throw std::bad_alloc Memory allocation for names fails.
/// \throw Other The constructor of the \c Name class will throw if the
/// names in the wire is invalid.
MINFO::MINFO(InputBuffer& buffer, size_t) :
rmailbox_(buffer), emailbox_(buffer)
{}
/// \brief Copy constructor.
///
/// \throw std::bad_alloc Memory allocation fails in copying internal
/// member variables (this should be very rare).
MINFO::MINFO(const MINFO& other) :
Rdata(), rmailbox_(other.rmailbox_), emailbox_(other.emailbox_)
{}
/// \brief Convert the \c MINFO to a string.
///
/// The output of this method is formatted as described in the "from string"
/// constructor (\c MINFO(const std::string&))).
///
/// \throw std::bad_alloc Internal resource allocation fails.
///
/// \return A \c string object that represents the \c MINFO object.
std::string
MINFO::toText() const {
return (rmailbox_.toText() + " " + emailbox_.toText());
}
/// \brief Render the \c MINFO in the wire format without name compression.
///
/// \throw std::bad_alloc Internal resource allocation fails.
///
/// \param buffer An output buffer to store the wire data.
void
MINFO::toWire(OutputBuffer& buffer) const {
rmailbox_.toWire(buffer);
emailbox_.toWire(buffer);
}
MINFO&
MINFO::operator=(const MINFO& source) {
rmailbox_ = source.rmailbox_;
emailbox_ = source.emailbox_;
return (*this);
}
/// \brief Render the \c MINFO in the wire format with taking into account
/// compression.
///
/// As specified in RFC3597, TYPE MINFO is "well-known", the rmailbox and
/// emailbox fields (domain names) will be compressed.
///
/// \throw std::bad_alloc Internal resource allocation fails.
///
/// \param renderer DNS message rendering context that encapsulates the
/// output buffer and name compression information.
void
MINFO::toWire(AbstractMessageRenderer& renderer) const {
renderer.writeName(rmailbox_);
renderer.writeName(emailbox_);
}
/// \brief Compare two instances of \c MINFO RDATA.
///
/// See documentation in \c Rdata.
int
MINFO::compare(const Rdata& other) const {
const MINFO& other_minfo = dynamic_cast<const MINFO&>(other);
const int cmp = compareNames(rmailbox_, other_minfo.rmailbox_);
if (cmp != 0) {
return (cmp);
}
return (compareNames(emailbox_, other_minfo.emailbox_));
}
// END_RDATA_NAMESPACE
// END_ISC_NAMESPACE
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