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/*
* This file is part of PowerDNS or dnsdist.
* Copyright -- PowerDNS.COM B.V. and its contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* In addition, for the avoidance of any doubt, permission is granted to
* link this program with OpenSSL and to (re)distribute the binaries
* produced as the result of such linking.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef BOOST_TEST_DYN_LINK
#define BOOST_TEST_DYN_LINK
#endif
#define BOOST_TEST_NO_MAIN
#include <boost/test/unit_test.hpp>
#include "dnsdist-async.hh"
BOOST_AUTO_TEST_SUITE(test_dnsdistasync)
class DummyQuerySender : public TCPQuerySender
{
public:
bool active() const override
{
return true;
}
void handleResponse([[maybe_unused]] const struct timeval& now, [[maybe_unused]] TCPResponse&& response) override
{
}
void handleXFRResponse([[maybe_unused]] const struct timeval& now, [[maybe_unused]] TCPResponse&& response) override
{
}
void notifyIOError([[maybe_unused]] const struct timeval& now, [[maybe_unused]] TCPResponse&& response) override
{
errorRaised = true;
}
std::atomic<bool> errorRaised{false};
};
struct DummyCrossProtocolQuery : public CrossProtocolQuery
{
DummyCrossProtocolQuery() :
CrossProtocolQuery()
{
d_sender = std::make_shared<DummyQuerySender>();
}
std::shared_ptr<TCPQuerySender> getTCPQuerySender() override
{
return d_sender;
}
std::shared_ptr<DummyQuerySender> d_sender;
};
BOOST_AUTO_TEST_CASE(test_Basic)
{
auto holder = std::make_unique<dnsdist::AsynchronousHolder>();
BOOST_CHECK(holder->empty());
{
auto query = holder->get(0, 0);
BOOST_CHECK(query == nullptr);
}
{
uint16_t asyncID = 1;
uint16_t queryID = 42;
struct timeval ttd;
gettimeofday(&ttd, nullptr);
// timeout in 100 ms
const timeval add{0, 100000};
ttd = ttd + add;
holder->push(asyncID, queryID, ttd, std::make_unique<DummyCrossProtocolQuery>());
BOOST_CHECK(!holder->empty());
auto query = holder->get(0, 0);
BOOST_CHECK(query == nullptr);
query = holder->get(asyncID, queryID);
BOOST_CHECK(holder->empty());
query = holder->get(asyncID, queryID);
BOOST_CHECK(query == nullptr);
// sleep for 200 ms, to be sure the main thread has
// been awakened
usleep(200000);
}
holder->stop();
}
BOOST_AUTO_TEST_CASE(test_TimeoutFailClose)
{
auto holder = std::make_unique<dnsdist::AsynchronousHolder>(false);
uint16_t asyncID = 1;
uint16_t queryID = 42;
struct timeval ttd
{
};
std::shared_ptr<DummyQuerySender> sender{nullptr};
{
// timeout in 10 ms
const timeval add{0, 10000};
auto query = std::make_unique<DummyCrossProtocolQuery>();
sender = query->d_sender;
BOOST_REQUIRE(sender != nullptr);
gettimeofday(&ttd, nullptr);
ttd = ttd + add;
holder->push(asyncID, queryID, ttd, std::move(query));
BOOST_CHECK(!holder->empty());
}
// the event should be triggered after 10 ms, but we have seen
// many spurious failures on our CI, likely because the box is
// overloaded, so sleep for up to 100 ms to be sure
for (size_t counter = 0; !holder->empty() && counter < 10; counter++) {
usleep(10000);
}
BOOST_CHECK(holder->empty());
BOOST_CHECK(sender->errorRaised.load());
holder->stop();
}
BOOST_AUTO_TEST_CASE(test_AddingExpiredEvent)
{
auto holder = std::make_unique<dnsdist::AsynchronousHolder>(false);
uint16_t asyncID = 1;
uint16_t queryID = 42;
struct timeval ttd;
gettimeofday(&ttd, nullptr);
// timeout was 10 ms ago, for some reason (long processing time, CPU starvation...)
const timeval sub{0, 10000};
ttd = ttd - sub;
std::shared_ptr<DummyQuerySender> sender{nullptr};
{
auto query = std::make_unique<DummyCrossProtocolQuery>();
sender = query->d_sender;
BOOST_REQUIRE(sender != nullptr);
holder->push(asyncID, queryID, ttd, std::move(query));
}
// the expired event should be triggered almost immediately,
// but we have seen many spurious failures on our CI,
// likely because the box is overloaded, so sleep for up to
// 100 ms to be sure
for (size_t counter = 0; !holder->empty() && counter < 10; counter++) {
usleep(10000);
}
BOOST_CHECK(holder->empty());
BOOST_CHECK(sender->errorRaised.load());
holder->stop();
}
BOOST_AUTO_TEST_SUITE_END();
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