// 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 #include #include #include #include #include #include #include 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); } string Question::toText() const { return (name_.toText() + " " + rrclass_.toText() + " " + rrtype_.toText() + "\n"); } 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); } } }