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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.
#include <iostream>
#include <string>
#include <util/buffer.h>
#include <dns/messagerenderer.h>
#include <dns/name.h>
#include <dns/question.h>
#include <dns/rrclass.h>
#include <dns/rrtype.h>
using namespace std;
using namespace isc::util;
namespace isc {
namespace dns {
Question::Question(InputBuffer& buffer) :
name_(buffer), rrtype_(0), rrclass_(0)
{
// In theory, we could perform this in the member initialization list,
// and it would be a little bit more efficient. We don't do this, however,
// because the initialization ordering is crucial (type must be first)
// and the ordering in the initialization list depends on the appearance
// order of member variables. It's fragile to rely on such an implicit
// dependency, so we make the initialization order explicit.
rrtype_ = RRType(buffer);
rrclass_ = RRClass(buffer);
}
std::string
Question::toText(bool newline) const {
std::string r(name_.toText() + " " + rrclass_.toText() + " " +
rrtype_.toText());
if (newline) {
r.append("\n");
}
return (r);
}
unsigned int
Question::toWire(OutputBuffer& buffer) const {
name_.toWire(buffer);
rrtype_.toWire(buffer);
rrclass_.toWire(buffer); // number of "entries", which is always 1
return (1);
}
unsigned int
Question::toWire(AbstractMessageRenderer& renderer) const {
const size_t pos0 = renderer.getLength();
renderer.writeName(name_);
rrtype_.toWire(renderer);
rrclass_.toWire(renderer);
// Make sure the renderer has a room for the question
if (renderer.getLength() > renderer.getLengthLimit()) {
renderer.trim(renderer.getLength() - pos0);
renderer.setTruncated();
return (0);
}
return (1); // number of "entries"
}
ostream&
operator<<(std::ostream& os, const Question& question) {
os << question.toText();
return (os);
}
}
}
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