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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 <dns/message.h>
#include <dns/rcode.h>
#include <datasrc/memory_datasrc.h>
#include <auth/query.h>
using namespace isc::dns;
using namespace isc::datasrc;
namespace isc {
namespace auth {
struct Query::QueryImpl {
QueryImpl(const MemoryDataSrc& memory_datasrc, const Name& qname,
const RRType& qtype, Message& response) :
memory_datasrc_(memory_datasrc), qname_(qname), qtype_(qtype),
response_(response)
{}
const MemoryDataSrc& memory_datasrc_;
const Name& qname_;
const RRType& qtype_;
Message& response_;
};
Query::Query(const MemoryDataSrc& memory_datasrc, const Name& qname,
const RRType& qtype, Message& response) :
impl_(new QueryImpl(memory_datasrc, qname, qtype, response))
{}
Query::~Query() {
delete impl_;
}
void
Query::process() const {
const MemoryDataSrc::FindResult result =
impl_->memory_datasrc_.findZone(impl_->qname_);
bool keep_doing = true;
if (result.code != result::SUCCESS &&
result.code != result::PARTIALMATCH) {
impl_->response_.setRcode(Rcode::SERVFAIL());
return;
}
while (keep_doing) {
keep_doing = false;
Zone::FindResult db_result = result.zone->find(impl_->qname_,
impl_->qtype_);
switch (db_result.code) {
case Zone::SUCCESS:
impl_->response_.setRcode(Rcode::NOERROR());
impl_->response_.addRRset(Message::SECTION_ANSWER,
boost::const_pointer_cast<RRset>(db_result.rrset));
// fill in authority and addtional sections.
break;
case Zone::DELEGATION:
// add NS to authority section, fill in additional section.
break;
case Zone::NXDOMAIN:
impl_->response_.setRcode(Rcode::NXDOMAIN());
// add SOA to authority section
break;
case Zone::NXRRSET:
impl_->response_.setRcode(Rcode::NXRRSET());
// add SOA to authority section
break;
case Zone::CNAME:
case Zone::DNAME:
// replace qname, continue lookup
keep_doing = true;
break;
// should not happen, catch programming error here.
default:
break;
isc_throw(Unexpected,
"Zone::find return unexpected result.");
}
}
}
}
}
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