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monero/tests/unit_tests/epee_boosted_tcp_server.cpp

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// Copyright (c) 2014-2020, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
#include <boost/chrono/chrono.hpp>
#include <boost/thread/condition_variable.hpp>
#include <boost/thread/mutex.hpp>
#include "gtest/gtest.h"
#include "include_base_utils.h"
#include "string_tools.h"
#include "net/abstract_tcp_server2.h"
#include "net/levin_protocol_handler_async.h"
namespace
{
const uint32_t test_server_port = 5626;
const std::string test_server_host("127.0.0.1");
struct test_connection_context : public epee::net_utils::connection_context_base
{
};
struct test_protocol_handler_config
{
};
struct test_protocol_handler
{
typedef test_connection_context connection_context;
typedef test_protocol_handler_config config_type;
test_protocol_handler(epee::net_utils::i_service_endpoint* /*psnd_hndlr*/, config_type& /*config*/, connection_context& /*conn_context*/)
{
}
void after_init_connection()
{
}
void handle_qued_callback()
{
}
bool release_protocol()
{
return true;
}
bool handle_recv(const void* /*data*/, size_t /*size*/)
{
return false;
}
};
typedef epee::net_utils::boosted_tcp_server<test_protocol_handler> test_tcp_server;
}
TEST(boosted_tcp_server, worker_threads_are_exception_resistant)
{
test_tcp_server srv(epee::net_utils::e_connection_type_RPC); // RPC disables network limit for unit tests
ASSERT_TRUE(srv.init_server(test_server_port, test_server_host));
boost::mutex mtx;
boost::condition_variable cond;
int counter = 0;
auto counter_incrementer = [&counter, &cond, &mtx]()
{
boost::unique_lock<boost::mutex> lock(mtx);
++counter;
if (4 <= counter)
{
cond.notify_one();
}
};
// 2 theads, but 4 exceptions
ASSERT_TRUE(srv.run_server(2, false));
ASSERT_TRUE(srv.async_call([&counter_incrementer]() { counter_incrementer(); throw std::runtime_error("test 1"); }));
ASSERT_TRUE(srv.async_call([&counter_incrementer]() { counter_incrementer(); throw std::string("test 2"); }));
ASSERT_TRUE(srv.async_call([&counter_incrementer]() { counter_incrementer(); throw "test 3"; }));
ASSERT_TRUE(srv.async_call([&counter_incrementer]() { counter_incrementer(); throw 4; }));
{
boost::unique_lock<boost::mutex> lock(mtx);
ASSERT_NE(boost::cv_status::timeout, cond.wait_for(lock, boost::chrono::seconds(5)));
ASSERT_EQ(4, counter);
}
// Check if threads are alive
counter = 0;
//auto counter_incrementer = [&counter]() { counter.fetch_add(1); epee::misc_utils::sleep_no_w(counter.load() * 10); };
ASSERT_TRUE(srv.async_call(counter_incrementer));
ASSERT_TRUE(srv.async_call(counter_incrementer));
ASSERT_TRUE(srv.async_call(counter_incrementer));
ASSERT_TRUE(srv.async_call(counter_incrementer));
{
boost::unique_lock<boost::mutex> lock(mtx);
ASSERT_NE(boost::cv_status::timeout, cond.wait_for(lock, boost::chrono::seconds(5)));
ASSERT_EQ(4, counter);
}
srv.send_stop_signal();
ASSERT_TRUE(srv.timed_wait_server_stop(5 * 1000));
ASSERT_TRUE(srv.deinit_server());
}
TEST(test_epee_connection, test_lifetime)
{
struct context_t: epee::net_utils::connection_context_base {
static constexpr size_t get_max_bytes(int) noexcept { return -1; }
static constexpr int handshake_command() noexcept { return 1001; }
static constexpr bool handshake_complete() noexcept { return true; }
};
using functional_obj_t = std::function<void ()>;
struct command_handler_t: epee::levin::levin_commands_handler<context_t> {
size_t delay;
functional_obj_t on_connection_close_f;
command_handler_t(size_t delay = 0,
functional_obj_t on_connection_close_f = nullptr
):
delay(delay),
on_connection_close_f(on_connection_close_f)
{}
virtual int invoke(int, const epee::span<const uint8_t>, epee::byte_slice&, context_t&) override { epee::misc_utils::sleep_no_w(delay); return {}; }
virtual int notify(int, const epee::span<const uint8_t>, context_t&) override { return {}; }
virtual void callback(context_t&) override {}
virtual void on_connection_new(context_t&) override {}
virtual void on_connection_close(context_t&) override {
if (on_connection_close_f)
on_connection_close_f();
}
virtual ~command_handler_t() override {}
static void destroy(epee::levin::levin_commands_handler<context_t>* ptr) { delete ptr; }
};
using handler_t = epee::levin::async_protocol_handler<context_t>;
using connection_t = epee::net_utils::connection<handler_t>;
using connection_ptr = boost::shared_ptr<connection_t>;
using shared_state_t = typename connection_t::shared_state;
using shared_state_ptr = std::shared_ptr<shared_state_t>;
using tag_t = boost::uuids::uuid;
using tags_t = std::vector<tag_t>;
using io_context_t = boost::asio::io_service;
using endpoint_t = boost::asio::ip::tcp::endpoint;
using work_t = boost::asio::io_service::work;
using work_ptr = std::shared_ptr<work_t>;
using workers_t = std::vector<std::thread>;
using server_t = epee::net_utils::boosted_tcp_server<handler_t>;
using lock_t = std::mutex;
using lock_guard_t = std::lock_guard<lock_t>;
using connection_weak_ptr = boost::weak_ptr<connection_t>;
struct shared_conn_t {
lock_t lock;
connection_weak_ptr conn;
};
using shared_conn_ptr = std::shared_ptr<shared_conn_t>;
io_context_t io_context;
work_ptr work(std::make_shared<work_t>(io_context));
workers_t workers;
while (workers.size() < 4) {
workers.emplace_back([&io_context]{
io_context.run();
});
}
endpoint_t endpoint(boost::asio::ip::address::from_string("127.0.0.1"), 5262);
server_t server(epee::net_utils::e_connection_type_P2P);
server.init_server(endpoint.port(),
endpoint.address().to_string(),
0,
"",
false,
true,
epee::net_utils::ssl_support_t::e_ssl_support_disabled
);
server.run_server(2, false);
server.get_config_shared()->set_handler(new command_handler_t, &command_handler_t::destroy);
io_context.post([&io_context, &work, &endpoint, &server]{
auto scope_exit_handler = epee::misc_utils::create_scope_leave_handler([&work]{
work.reset();
});
shared_state_ptr shared_state(std::make_shared<shared_state_t>());
shared_state->set_handler(new command_handler_t, &command_handler_t::destroy);
auto create_connection = [&io_context, &endpoint, &shared_state] {
connection_ptr conn(new connection_t(io_context, shared_state, {}, {}));
conn->socket().connect(endpoint);
conn->start({}, {});
context_t context;
conn->get_context(context);
auto tag = context.m_connection_id;
return tag;
};
ASSERT_TRUE(shared_state->get_connections_count() == 0);
auto tag = create_connection();
ASSERT_TRUE(shared_state->get_connections_count() == 1);
bool success = shared_state->for_connection(tag, [shared_state](context_t& context){
shared_state->close(context.m_connection_id);
context.m_remote_address.get_zone();
return true;
});
ASSERT_TRUE(success);
ASSERT_TRUE(shared_state->get_connections_count() == 0);
constexpr auto N = 8;
tags_t tags(N);
for(auto &t: tags)
t = create_connection();
ASSERT_TRUE(shared_state->get_connections_count() == N);
size_t index = 0;
success = shared_state->foreach_connection([&index, shared_state, &tags, &create_connection](context_t& context){
if (!index)
for (const auto &t: tags)
shared_state->close(t);
shared_state->close(context.m_connection_id);
context.m_remote_address.get_zone();
++index;
for(auto i = 0; i < N; ++i)
create_connection();
return true;
});
ASSERT_TRUE(success);
ASSERT_TRUE(index == N);
ASSERT_TRUE(shared_state->get_connections_count() == N * N);
index = 0;
success = shared_state->foreach_connection([&index, shared_state](context_t& context){
shared_state->close(context.m_connection_id);
context.m_remote_address.get_zone();
++index;
return true;
});
ASSERT_TRUE(success);
ASSERT_TRUE(index == N * N);
ASSERT_TRUE(shared_state->get_connections_count() == 0);
while (shared_state->sock_count);
ASSERT_TRUE(shared_state->get_connections_count() == 0);
constexpr auto DELAY = 30;
constexpr auto TIMEOUT = 1;
server.get_config_shared()->set_handler(new command_handler_t(DELAY), &command_handler_t::destroy);
for (auto i = 0; i < N; ++i) {
tag = create_connection();
ASSERT_TRUE(shared_state->get_connections_count() == 1);
success = shared_state->invoke_async(1, {}, tag, [](int, const epee::span<const uint8_t>, context_t&){}, TIMEOUT);
ASSERT_TRUE(success);
while (shared_state->sock_count == 1) {
success = shared_state->foreach_connection([&shared_state, &tag](context_t&){
return shared_state->request_callback(tag);
});
ASSERT_TRUE(success);
}
shared_state->close(tag);
ASSERT_TRUE(shared_state->get_connections_count() == 0);
}
while (shared_state->sock_count);
constexpr auto ZERO_DELAY = 0;
size_t counter = 0;
shared_state->set_handler(new command_handler_t(ZERO_DELAY,
[&counter]{
ASSERT_TRUE(counter++ == 0);
}
),
&command_handler_t::destroy
);
connection_ptr conn(new connection_t(io_context, shared_state, {}, {}));
conn->socket().connect(endpoint);
conn->start({}, {});
ASSERT_TRUE(shared_state->get_connections_count() == 1);
shared_state->del_out_connections(1);
ASSERT_TRUE(shared_state->get_connections_count() == 0);
conn.reset();
while (shared_state->sock_count);
shared_conn_ptr shared_conn(std::make_shared<shared_conn_t>());
shared_state->set_handler(new command_handler_t(ZERO_DELAY,
[shared_state, shared_conn]{
{
connection_ptr conn;
{
lock_guard_t guard(shared_conn->lock);
conn = std::move(shared_conn->conn.lock());
}
if (conn)
conn->cancel();
}
const auto success = shared_state->foreach_connection([](context_t&){
return true;
});
ASSERT_TRUE(success);
}
),
&command_handler_t::destroy
);
for (auto i = 0; i < N; ++i) {
{
connection_ptr conn(new connection_t(io_context, shared_state, {}, {}));
conn->socket().connect(endpoint);
conn->start({}, {});
lock_guard_t guard(shared_conn->lock);
shared_conn->conn = conn;
}
ASSERT_TRUE(shared_state->get_connections_count() == 1);
shared_state->del_out_connections(1);
ASSERT_TRUE(shared_state->get_connections_count() == 0);
}
});
for (auto& w: workers) {
w.join();
}
server.send_stop_signal();
server.timed_wait_server_stop(5 * 1000);
server.deinit_server();
}
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