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connection_handler_test.cc
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#include <chrono>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "envoy/api/io_error.h"
#include "envoy/config/core/v3/base.pb.h"
#include "envoy/config/listener/v3/udp_listener_config.pb.h"
#include "envoy/network/exception.h"
#include "envoy/network/filter.h"
#include "envoy/stats/scope.h"
#include "source/common/common/utility.h"
#include "source/common/config/utility.h"
#include "source/common/network/address_impl.h"
#include "source/common/network/connection_balancer_impl.h"
#include "source/common/network/io_socket_handle_impl.h"
#include "source/common/network/raw_buffer_socket.h"
#include "source/common/network/udp_listener_impl.h"
#include "source/common/network/udp_packet_writer_handler_impl.h"
#include "source/common/network/utility.h"
#include "source/extensions/listener_managers/listener_manager/active_raw_udp_listener_config.h"
#include "source/extensions/listener_managers/listener_manager/connection_handler_impl.h"
#include "test/mocks/access_log/mocks.h"
#include "test/mocks/api/mocks.h"
#include "test/mocks/common.h"
#include "test/mocks/network/mocks.h"
#include "test/test_common/network_utility.h"
#include "test/test_common/test_runtime.h"
#include "test/test_common/threadsafe_singleton_injector.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
using testing::_;
using testing::ByMove;
using testing::InSequence;
using testing::Invoke;
using testing::MockFunction;
using testing::NiceMock;
using testing::Return;
using testing::ReturnPointee;
using testing::ReturnRef;
using testing::ReturnRefOfCopy;
using testing::SaveArg;
namespace Envoy {
namespace Server {
namespace {
class ConnectionHandlerTest : public testing::Test, protected Logger::Loggable<Logger::Id::main> {
public:
ConnectionHandlerTest()
: handler_(new ConnectionHandlerImpl(dispatcher_, 0)),
filter_chain_(std::make_shared<NiceMock<Network::MockFilterChain>>()),
listener_filter_matcher_(std::make_shared<NiceMock<Network::MockListenerFilterMatcher>>()),
access_log_(std::make_shared<AccessLog::MockInstance>()) {
ON_CALL(*filter_chain_, transportSocketFactory)
.WillByDefault(ReturnPointee(std::shared_ptr<Network::DownstreamTransportSocketFactory>{
Network::Test::createRawBufferDownstreamSocketFactory()}));
ON_CALL(*filter_chain_, networkFilterFactories)
.WillByDefault(ReturnPointee(std::make_shared<std::vector<Network::FilterFactoryCb>>()));
ON_CALL(*listener_filter_matcher_, matches(_)).WillByDefault(Return(false));
}
class TestListenerBase : public Network::ListenerConfig {
public:
TestListenerBase(
ConnectionHandlerTest& parent, uint64_t tag, bool bind_to_port,
bool hand_off_restored_destination_connections, const std::string& name,
Network::Socket::Type socket_type, std::chrono::milliseconds listener_filters_timeout,
bool continue_on_listener_filters_timeout,
std::shared_ptr<AccessLog::MockInstance> access_log,
std::shared_ptr<NiceMock<Network::MockFilterChainManager>> filter_chain_manager = nullptr,
uint32_t tcp_backlog_size = ENVOY_TCP_BACKLOG_SIZE, bool ignore_global_conn_limit = false,
int num_of_socket_factories = 1)
: parent_(parent), tag_(tag), bind_to_port_(bind_to_port),
tcp_backlog_size_(tcp_backlog_size),
hand_off_restored_destination_connections_(hand_off_restored_destination_connections),
name_(name), listener_filters_timeout_(listener_filters_timeout),
continue_on_listener_filters_timeout_(continue_on_listener_filters_timeout),
access_logs_({access_log}), inline_filter_chain_manager_(filter_chain_manager),
init_manager_(nullptr), ignore_global_conn_limit_(ignore_global_conn_limit) {
for (int i = 0; i < num_of_socket_factories; i++) {
socket_factories_.emplace_back(std::make_unique<Network::MockListenSocketFactory>());
sockets_.emplace_back(std::make_shared<NiceMock<Network::MockListenSocket>>());
ON_CALL(*sockets_.back().get(), socketType()).WillByDefault(Return(socket_type));
}
envoy::config::listener::v3::UdpListenerConfig udp_config;
udp_listener_config_ = std::make_unique<UdpListenerConfigImpl>(udp_config);
udp_listener_config_->listener_factory_ =
std::make_unique<Server::ActiveRawUdpListenerFactory>(1);
udp_listener_config_->writer_factory_ = std::make_unique<Network::UdpDefaultWriterFactory>();
}
struct UdpListenerConfigImpl : public Network::UdpListenerConfig {
UdpListenerConfigImpl(const envoy::config::listener::v3::UdpListenerConfig& config)
: config_(config) {}
// Network::UdpListenerConfig
Network::ActiveUdpListenerFactory& listenerFactory() override { return *listener_factory_; }
Network::UdpPacketWriterFactory& packetWriterFactory() override { return *writer_factory_; }
Network::UdpListenerWorkerRouter&
listenerWorkerRouter(const Network::Address::Instance& address) override {
auto iter = listener_worker_router_map_.find(address.asString());
EXPECT_NE(iter, listener_worker_router_map_.end());
return *iter->second;
}
const envoy::config::listener::v3::UdpListenerConfig& config() override { return config_; }
const envoy::config::listener::v3::UdpListenerConfig config_;
std::unique_ptr<Network::ActiveUdpListenerFactory> listener_factory_;
std::unique_ptr<Network::UdpPacketWriterFactory> writer_factory_;
absl::flat_hash_map<std::string, Network::UdpListenerWorkerRouterPtr>
listener_worker_router_map_;
};
// A helper to get the reference of listen socket factory.
Network::MockListenSocketFactory& socketFactory(int index = 0) {
return *static_cast<Network::MockListenSocketFactory*>(socket_factories_[index].get());
}
// Network::ListenerConfig
Network::FilterChainManager& filterChainManager() override {
return inline_filter_chain_manager_ == nullptr ? parent_.manager_
: *inline_filter_chain_manager_;
}
Network::FilterChainFactory& filterChainFactory() override { return parent_.factory_; }
std::vector<Network::ListenSocketFactoryPtr>& listenSocketFactories() override {
return socket_factories_;
}
bool bindToPort() const override { return bind_to_port_; }
bool handOffRestoredDestinationConnections() const override {
return hand_off_restored_destination_connections_;
}
uint32_t perConnectionBufferLimitBytes() const override { return 0; }
std::chrono::milliseconds listenerFiltersTimeout() const override {
return listener_filters_timeout_;
}
bool continueOnListenerFiltersTimeout() const override {
return continue_on_listener_filters_timeout_;
}
Stats::Scope& listenerScope() override { return *parent_.stats_store_.rootScope(); }
uint64_t listenerTag() const override { return tag_; }
const std::string& name() const override { return name_; }
Network::UdpListenerConfigOptRef udpListenerConfig() override { return *udp_listener_config_; }
Network::InternalListenerConfigOptRef internalListenerConfig() override { return {}; }
envoy::config::core::v3::TrafficDirection direction() const override { return direction_; }
void setDirection(envoy::config::core::v3::TrafficDirection direction) {
direction_ = direction;
}
const std::vector<AccessLog::InstanceSharedPtr>& accessLogs() const override {
return access_logs_;
}
ResourceLimit& openConnections() override { return open_connections_; }
uint32_t tcpBacklogSize() const override { return tcp_backlog_size_; }
uint32_t maxConnectionsToAcceptPerSocketEvent() const override {
return Network::DefaultMaxConnectionsToAcceptPerSocketEvent;
}
Init::Manager& initManager() override { return *init_manager_; }
bool ignoreGlobalConnLimit() const override { return ignore_global_conn_limit_; }
void setMaxConnections(const uint32_t num_connections) {
open_connections_.setMax(num_connections);
}
void clearMaxConnections() { open_connections_.resetMax(); }
ConnectionHandlerTest& parent_;
std::vector<std::shared_ptr<NiceMock<Network::MockListenSocket>>> sockets_;
std::vector<Network::ListenSocketFactoryPtr> socket_factories_;
uint64_t tag_;
bool bind_to_port_;
const uint32_t tcp_backlog_size_;
const bool hand_off_restored_destination_connections_;
const std::string name_;
const std::chrono::milliseconds listener_filters_timeout_;
const bool continue_on_listener_filters_timeout_;
std::unique_ptr<UdpListenerConfigImpl> udp_listener_config_;
BasicResourceLimitImpl open_connections_;
const std::vector<AccessLog::InstanceSharedPtr> access_logs_;
std::shared_ptr<NiceMock<Network::MockFilterChainManager>> inline_filter_chain_manager_;
std::unique_ptr<Init::Manager> init_manager_;
const bool ignore_global_conn_limit_;
envoy::config::core::v3::TrafficDirection direction_;
absl::flat_hash_map<std::string, Network::UdpListenerCallbacks*> udp_listener_callback_map_{};
};
class TestListener : public TestListenerBase {
public:
TestListener(
ConnectionHandlerTest& parent, uint64_t tag, bool bind_to_port,
bool hand_off_restored_destination_connections, const std::string& name,
Network::Socket::Type socket_type, std::chrono::milliseconds listener_filters_timeout,
bool continue_on_listener_filters_timeout,
std::shared_ptr<AccessLog::MockInstance> access_log,
std::shared_ptr<NiceMock<Network::MockFilterChainManager>> filter_chain_manager = nullptr,
uint32_t tcp_backlog_size = ENVOY_TCP_BACKLOG_SIZE,
Network::ConnectionBalancerSharedPtr connection_balancer = nullptr,
bool ignore_global_conn_limit = false, int num_of_socket_factories = 1)
: TestListenerBase(parent, tag, bind_to_port, hand_off_restored_destination_connections,
name, socket_type, listener_filters_timeout,
continue_on_listener_filters_timeout, access_log, filter_chain_manager,
tcp_backlog_size, ignore_global_conn_limit, num_of_socket_factories),
connection_balancer_(connection_balancer == nullptr
? std::make_shared<Network::NopConnectionBalancerImpl>()
: connection_balancer) {}
Network::ConnectionBalancer& connectionBalancer(const Network::Address::Instance&) override {
return *connection_balancer_;
}
Network::ConnectionBalancerSharedPtr connection_balancer_;
};
class TestMultiAddressesListener : public TestListenerBase {
public:
TestMultiAddressesListener(
ConnectionHandlerTest& parent, uint64_t tag, bool bind_to_port,
bool hand_off_restored_destination_connections, const std::string& name,
Network::Socket::Type socket_type, std::chrono::milliseconds listener_filters_timeout,
bool continue_on_listener_filters_timeout,
std::shared_ptr<AccessLog::MockInstance> access_log,
absl::flat_hash_map<std::string, Network::ConnectionBalancerSharedPtr>&
connection_balancers,
std::shared_ptr<NiceMock<Network::MockFilterChainManager>> filter_chain_manager = nullptr,
uint32_t tcp_backlog_size = ENVOY_TCP_BACKLOG_SIZE, bool ignore_global_conn_limit = false,
int num_of_socket_factories = 1)
: TestListenerBase(parent, tag, bind_to_port, hand_off_restored_destination_connections,
name, socket_type, listener_filters_timeout,
continue_on_listener_filters_timeout, access_log, filter_chain_manager,
tcp_backlog_size, ignore_global_conn_limit, num_of_socket_factories),
connection_balancers_(connection_balancers) {}
Network::ConnectionBalancer&
connectionBalancer(const Network::Address::Instance& address) override {
auto iter = connection_balancers_.find(address.asString());
EXPECT_NE(iter, connection_balancers_.end());
return *iter->second;
}
absl::flat_hash_map<std::string, Network::ConnectionBalancerSharedPtr> connection_balancers_;
};
using TestListenerPtr = std::unique_ptr<TestListenerBase>;
class MockUpstreamUdpFilter : public Network::UdpListenerReadFilter {
public:
MockUpstreamUdpFilter(ConnectionHandlerTest& parent, Network::UdpReadFilterCallbacks& callbacks)
: UdpListenerReadFilter(callbacks), parent_(parent) {}
~MockUpstreamUdpFilter() override {
parent_.deleted_before_listener_ = !parent_.udp_listener_deleted_;
}
MOCK_METHOD(Network::FilterStatus, onData, (Network::UdpRecvData&), (override));
MOCK_METHOD(Network::FilterStatus, onReceiveError, (Api::IoError::IoErrorCode), (override));
private:
ConnectionHandlerTest& parent_;
};
class MockUpstreamUdpListener : public Network::UdpListener {
public:
explicit MockUpstreamUdpListener(ConnectionHandlerTest& parent) : parent_(parent) {
ON_CALL(*this, dispatcher()).WillByDefault(ReturnRef(dispatcher_));
}
~MockUpstreamUdpListener() override { parent_.udp_listener_deleted_ = true; }
MOCK_METHOD(void, enable, (), (override));
MOCK_METHOD(void, disable, (), (override));
MOCK_METHOD(void, setRejectFraction, (UnitFloat));
MOCK_METHOD(void, configureLoadShedPoints, (Server::LoadShedPointProvider&));
MOCK_METHOD(Event::Dispatcher&, dispatcher, (), (override));
MOCK_METHOD(Network::Address::InstanceConstSharedPtr&, localAddress, (), (const, override));
MOCK_METHOD(Api::IoCallUint64Result, send, (const Network::UdpSendData&), (override));
MOCK_METHOD(Api::IoCallUint64Result, flush, (), (override));
MOCK_METHOD(void, activateRead, (), (override));
private:
ConnectionHandlerTest& parent_;
Event::MockDispatcher dispatcher_;
};
TestListener* addListener(
uint64_t tag, bool bind_to_port, bool hand_off_restored_destination_connections,
const std::string& name, Network::Listener* listener,
Network::TcpListenerCallbacks** listener_callbacks = nullptr,
Network::Address::InstanceConstSharedPtr address = nullptr,
std::shared_ptr<Network::MockConnectionBalancer> connection_balancer = nullptr,
Network::BalancedConnectionHandler** balanced_connection_handler = nullptr,
Network::Socket::Type socket_type = Network::Socket::Type::Stream,
std::chrono::milliseconds listener_filters_timeout = std::chrono::milliseconds(15000),
bool continue_on_listener_filters_timeout = false,
std::shared_ptr<NiceMock<Network::MockFilterChainManager>> overridden_filter_chain_manager =
nullptr,
uint32_t tcp_backlog_size = ENVOY_TCP_BACKLOG_SIZE, bool ignore_global_conn_limit = false) {
auto test_listener = std::make_unique<TestListener>(
*this, tag, bind_to_port, hand_off_restored_destination_connections, name, socket_type,
listener_filters_timeout, continue_on_listener_filters_timeout, access_log_,
overridden_filter_chain_manager, tcp_backlog_size, connection_balancer,
ignore_global_conn_limit);
TestListener* test_listener_raw_ptr = test_listener.get();
listeners_.emplace_back(std::move(test_listener));
if (listener == nullptr) {
// Expecting listener config in place update.
// If so, dispatcher would not create new network listener.
return test_listener_raw_ptr;
}
EXPECT_CALL(listeners_.back()->socketFactory(), socketType()).WillOnce(Return(socket_type));
if (address == nullptr) {
EXPECT_CALL(listeners_.back()->socketFactory(), localAddress())
.WillRepeatedly(ReturnRef(local_address_));
listeners_.back()->sockets_[0]->connection_info_provider_->setLocalAddress(local_address_);
} else {
EXPECT_CALL(listeners_.back()->socketFactory(), localAddress())
.WillRepeatedly(ReturnRefOfCopy(address));
listeners_.back()->sockets_[0]->connection_info_provider_->setLocalAddress(address);
}
EXPECT_CALL(listeners_.back()->socketFactory(), getListenSocket(_))
.WillOnce(Return(listeners_.back()->sockets_[0]));
if (socket_type == Network::Socket::Type::Stream) {
EXPECT_CALL(dispatcher_, createListener_(_, _, _, _))
.WillOnce(Invoke(
[listener, listener_callbacks](Network::SocketSharedPtr&&,
Network::TcpListenerCallbacks& cb, Runtime::Loader&,
const Network::ListenerConfig&) -> Network::Listener* {
if (listener_callbacks != nullptr) {
*listener_callbacks = &cb;
}
return listener;
}));
} else {
EXPECT_CALL(dispatcher_, createUdpListener_(_, _, _))
.WillOnce(
Invoke([listener, &test_listener = listeners_.back()](
Network::SocketSharedPtr&& socket,
Network::UdpListenerCallbacks& udp_listener_callbacks,
const envoy::config::core::v3::UdpSocketConfig&) -> Network::UdpListener* {
test_listener->udp_listener_callback_map_.emplace(
socket->connectionInfoProvider().localAddress()->asString(),
&udp_listener_callbacks);
return dynamic_cast<Network::UdpListener*>(listener);
}));
if (address == nullptr) {
listeners_.back()->udp_listener_config_->listener_worker_router_map_.emplace(
local_address_->asString(), std::make_unique<Network::UdpListenerWorkerRouterImpl>(1));
} else {
listeners_.back()->udp_listener_config_->listener_worker_router_map_.emplace(
address->asString(), std::make_unique<Network::UdpListenerWorkerRouterImpl>(1));
}
}
if (balanced_connection_handler != nullptr) {
EXPECT_CALL(*connection_balancer, registerHandler(_))
.WillOnce(SaveArgAddress(balanced_connection_handler));
}
return test_listener_raw_ptr;
}
TestMultiAddressesListener* addMultiAddrsListener(
uint64_t tag, bool bind_to_port, bool hand_off_restored_destination_connections,
const std::string& name, std::vector<Network::Listener*>& mock_listeners,
std::vector<Network::Address::InstanceConstSharedPtr>& addresses,
absl::flat_hash_map<std::string, Network::ConnectionBalancerSharedPtr>& connection_balancers,
absl::flat_hash_map<std::string, Network::TcpListenerCallbacks**>& listener_callbacks_map,
bool disable_listener = false,
Network::Socket::Type socket_type = Network::Socket::Type::Stream) {
if (connection_balancers.empty() && socket_type == Network::Socket::Type::Stream) {
for (auto& address : addresses) {
connection_balancers.emplace(address->asString(),
std::make_shared<Network::NopConnectionBalancerImpl>());
}
}
auto test_listener = std::make_unique<TestMultiAddressesListener>(
*this, tag, bind_to_port, hand_off_restored_destination_connections, name, socket_type,
std::chrono::milliseconds(15000), false, access_log_, connection_balancers, nullptr,
ENVOY_TCP_BACKLOG_SIZE, false, mock_listeners.size());
TestMultiAddressesListener* test_listener_raw_ptr = test_listener.get();
listeners_.emplace_back(std::move(test_listener));
EXPECT_CALL(listeners_.back()->socketFactory(0), socketType()).WillOnce(Return(socket_type));
for (std::vector<Network::Listener*>::size_type i = 0; i < mock_listeners.size(); i++) {
EXPECT_CALL(listeners_.back()->socketFactory(i), localAddress())
.WillRepeatedly(ReturnRef(addresses[i]));
EXPECT_CALL(listeners_.back()->socketFactory(i), getListenSocket(_))
.WillOnce(Return(listeners_.back()->sockets_[i]));
test_listener_raw_ptr->sockets_[i]->connection_info_provider_->setLocalAddress(addresses[i]);
if (socket_type == Network::Socket::Type::Stream) {
EXPECT_CALL(dispatcher_, createListener_(_, _, _, _))
.WillOnce(
Invoke([i, &mock_listeners, &listener_callbacks_map](
Network::SocketSharedPtr&& socket, Network::TcpListenerCallbacks& cb,
Runtime::Loader&, const Network::ListenerConfig&) -> Network::Listener* {
auto listener_callbacks_iter = listener_callbacks_map.find(
socket->connectionInfoProvider().localAddress()->asString());
EXPECT_NE(listener_callbacks_iter, listener_callbacks_map.end());
*listener_callbacks_iter->second = &cb;
return mock_listeners[i];
}))
.RetiresOnSaturation();
} else {
EXPECT_CALL(dispatcher_, createUdpListener_(_, _, _))
.WillOnce(Invoke(
[i, &mock_listeners, &test_listener = listeners_.back()](
Network::SocketSharedPtr&& socket,
Network::UdpListenerCallbacks& udp_listener_callbacks,
const envoy::config::core::v3::UdpSocketConfig&) -> Network::UdpListener* {
test_listener->udp_listener_callback_map_.emplace(
socket->connectionInfoProvider().localAddress()->asString(),
&udp_listener_callbacks);
return dynamic_cast<Network::UdpListener*>(mock_listeners[i]);
}))
.RetiresOnSaturation();
listeners_.back()->udp_listener_config_->listener_worker_router_map_.emplace(
addresses[i]->asString(), std::make_unique<Network::MockUdpListenerWorkerRouter>());
}
if (disable_listener) {
EXPECT_CALL(*static_cast<Network::MockListener*>(mock_listeners[i]), disable());
}
}
return test_listener_raw_ptr;
}
void validateOriginalDst(Network::TcpListenerCallbacks** listener_callbacks,
TestListener* test_listener, Network::MockListener* listener) {
Network::Address::InstanceConstSharedPtr normal_address(
new Network::Address::Ipv4Instance("127.0.0.1", 80));
// Original dst address nor port number match that of the listener's address.
Network::Address::InstanceConstSharedPtr original_dst_address(
new Network::Address::Ipv4Instance("127.0.0.2", 8080));
Network::Address::InstanceConstSharedPtr any_address = Network::Utility::getAddressWithPort(
*Network::Utility::getIpv4AnyAddress(), normal_address->ip()->port());
EXPECT_CALL(test_listener->socketFactory(), localAddress())
.WillRepeatedly(ReturnRef(any_address));
handler_->addListener(absl::nullopt, *test_listener, runtime_);
Network::MockListenerFilter* test_filter = new Network::MockListenerFilter();
Network::MockConnectionSocket* accepted_socket = new NiceMock<Network::MockConnectionSocket>();
EXPECT_CALL(factory_, createListenerFilterChain(_))
.WillRepeatedly(Invoke([&](Network::ListenerFilterManager& manager) -> bool {
// Insert the Mock filter.
manager.addAcceptFilter(listener_filter_matcher_,
Network::ListenerFilterPtr{test_filter});
return true;
}));
EXPECT_CALL(*test_filter, onAccept(_))
.WillOnce(Invoke([&](Network::ListenerFilterCallbacks& cb) -> Network::FilterStatus {
cb.socket().connectionInfoProvider().restoreLocalAddress(original_dst_address);
return Network::FilterStatus::Continue;
}));
EXPECT_CALL(*test_filter, destroy_());
EXPECT_CALL(manager_, findFilterChain(_, _)).WillOnce(Return(filter_chain_.get()));
auto* connection = new NiceMock<Network::MockServerConnection>();
EXPECT_CALL(dispatcher_, createServerConnection_()).WillOnce(Return(connection));
EXPECT_CALL(factory_, createNetworkFilterChain(_, _)).WillOnce(Return(true));
(*listener_callbacks)->onAccept(Network::ConnectionSocketPtr{accepted_socket});
EXPECT_EQ(1UL, handler_->numConnections());
EXPECT_CALL(*listener, onDestroy());
EXPECT_CALL(*access_log_, log(_, _, _, _, _));
}
Stats::TestUtil::TestStore stats_store_;
Network::Address::InstanceConstSharedPtr local_address_{
new Network::Address::Ipv4Instance("127.0.0.1", 10001)};
NiceMock<Event::MockDispatcher> dispatcher_{"test"};
std::list<TestListenerPtr> listeners_;
std::unique_ptr<ConnectionHandlerImpl> handler_;
NiceMock<Network::MockFilterChainManager> manager_;
NiceMock<Network::MockFilterChainFactory> factory_;
const std::shared_ptr<Network::MockFilterChain> filter_chain_;
NiceMock<Api::MockOsSysCalls> os_sys_calls_;
TestThreadsafeSingletonInjector<Api::OsSysCallsImpl> os_calls_{&os_sys_calls_};
std::shared_ptr<NiceMock<Network::MockListenerFilterMatcher>> listener_filter_matcher_;
bool udp_listener_deleted_ = false;
bool deleted_before_listener_ = false;
std::shared_ptr<AccessLog::MockInstance> access_log_;
TestScopedRuntime scoped_runtime_;
Runtime::Loader& runtime_{scoped_runtime_.loader()};
};
// Verify that if a listener is removed while a rebalanced connection is in flight, we correctly
// destroy the connection.
TEST_F(ConnectionHandlerTest, RemoveListenerDuringRebalance) {
InSequence s;
// For reasons I did not investigate, the death test below requires this, likely due to
// forking.
// So we just leak the FDs for this test.
ON_CALL(os_sys_calls_, close(_)).WillByDefault(Return(Api::SysCallIntResult{0, 0}));
Network::TcpListenerCallbacks* listener_callbacks;
auto listener = new NiceMock<Network::MockListener>();
auto connection_balancer = std::make_shared<Network::MockConnectionBalancer>();
Network::BalancedConnectionHandler* current_handler;
TestListener* test_listener =
addListener(1, true, false, "test_listener", listener, &listener_callbacks, nullptr,
connection_balancer, ¤t_handler);
handler_->addListener(absl::nullopt, *test_listener, runtime_);
// Fake a balancer posting a connection to us.
Event::PostCb post_cb;
EXPECT_CALL(dispatcher_, post(_)).WillOnce([&post_cb](Event::PostCb cb) {
post_cb = std::move(cb);
});
Network::MockConnectionSocket* connection = new NiceMock<Network::MockConnectionSocket>();
current_handler->incNumConnections();
#ifndef NDEBUG
EXPECT_CALL(*access_log_, log(_, _, _, _, _));
#endif
current_handler->post(Network::ConnectionSocketPtr{connection});
EXPECT_CALL(*connection_balancer, unregisterHandler(_));
// This also tests the assert in ConnectionHandlerImpl::ActiveTcpListener::~ActiveTcpListener.
// See the long comment at the end of that function.
#ifndef NDEBUG
// On debug builds this should crash.
EXPECT_DEATH(handler_->removeListeners(1), ".*num_listener_connections_ == 0.*");
// The original test continues without the previous line being run. To avoid the same assert
// firing during teardown, run the posted callback now.
post_cb();
ASSERT(post_cb != nullptr);
EXPECT_CALL(*listener, onDestroy());
#else
// On release builds this should be fine.
EXPECT_CALL(*listener, onDestroy());
handler_->removeListeners(1);
post_cb();
#endif
}
TEST_F(ConnectionHandlerTest, ListenerConnectionLimitEnforced) {
Network::TcpListenerCallbacks* listener_callbacks1;
auto listener1 = new NiceMock<Network::MockListener>();
Network::Address::InstanceConstSharedPtr normal_address(
new Network::Address::Ipv4Instance("127.0.0.1", 10001));
TestListener* test_listener1 = addListener(1, false, false, "test_listener1", listener1,
&listener_callbacks1, normal_address);
// Only allow a single connection on this listener.
test_listener1->setMaxConnections(1);
handler_->addListener(absl::nullopt, *test_listener1, runtime_);
auto listener2 = new NiceMock<Network::MockListener>();
Network::TcpListenerCallbacks* listener_callbacks2;
Network::Address::InstanceConstSharedPtr alt_address(
new Network::Address::Ipv4Instance("127.0.0.2", 20002));
TestListener* test_listener2 =
addListener(2, false, false, "test_listener2", listener2, &listener_callbacks2, alt_address);
// Do not allow any connections on this listener.
test_listener2->setMaxConnections(0);
handler_->addListener(absl::nullopt, *test_listener2, runtime_);
EXPECT_CALL(manager_, findFilterChain(_, _)).WillRepeatedly(Return(filter_chain_.get()));
EXPECT_CALL(factory_, createNetworkFilterChain(_, _)).WillRepeatedly(Return(true));
Network::MockListenerFilter* test_filter = new Network::MockListenerFilter();
EXPECT_CALL(*test_filter, destroy_());
EXPECT_CALL(factory_, createListenerFilterChain(_))
.WillRepeatedly(Invoke([&](Network::ListenerFilterManager& manager) -> bool {
manager.addAcceptFilter(listener_filter_matcher_, Network::ListenerFilterPtr{test_filter});
return true;
}));
EXPECT_CALL(*test_filter, onAccept(_))
.WillRepeatedly(Invoke([&](Network::ListenerFilterCallbacks&) -> Network::FilterStatus {
return Network::FilterStatus::Continue;
}));
// For listener 2, verify its connection limit is independent of listener 1.
// We expect that listener 2 accepts the connection, so there will be a call to
// createServerConnection and active cx should increase, while cx overflow remains the same.
EXPECT_CALL(*access_log_, log(_, _, _, _, _));
listener_callbacks2->onAccept(
Network::ConnectionSocketPtr{new NiceMock<Network::MockConnectionSocket>()});
EXPECT_EQ(0, handler_->numConnections());
EXPECT_EQ(0, TestUtility::findCounter(stats_store_, "downstream_cx_total")->value());
EXPECT_EQ(0, TestUtility::findGauge(stats_store_, "downstream_cx_active")->value());
EXPECT_EQ(1, TestUtility::findCounter(stats_store_, "downstream_cx_overflow")->value());
// For listener 1, verify connections are limited after one goes active.
// First connection attempt should result in an active connection being created.
auto conn1 = new NiceMock<Network::MockServerConnection>();
EXPECT_CALL(dispatcher_, createServerConnection_()).WillOnce(Return(conn1));
listener_callbacks1->onAccept(
Network::ConnectionSocketPtr{new NiceMock<Network::MockConnectionSocket>()});
EXPECT_EQ(1, handler_->numConnections());
// Note that these stats are not the per-worker stats, but the per-listener stats.
EXPECT_EQ(1, TestUtility::findCounter(stats_store_, "downstream_cx_total")->value());
EXPECT_EQ(1, TestUtility::findGauge(stats_store_, "downstream_cx_active")->value());
EXPECT_EQ(1, TestUtility::findCounter(stats_store_, "downstream_cx_overflow")->value());
// Don't expect server connection to be created, should be instantly closed and increment
// overflow stat.
listener_callbacks1->onAccept(
Network::ConnectionSocketPtr{new NiceMock<Network::MockConnectionSocket>()});
EXPECT_EQ(1, handler_->numConnections());
EXPECT_EQ(1, TestUtility::findCounter(stats_store_, "downstream_cx_total")->value());
EXPECT_EQ(1, TestUtility::findGauge(stats_store_, "downstream_cx_active")->value());
EXPECT_EQ(2, TestUtility::findCounter(stats_store_, "downstream_cx_overflow")->value());
// Check behavior again for good measure.
listener_callbacks1->onAccept(
Network::ConnectionSocketPtr{new NiceMock<Network::MockConnectionSocket>()});
EXPECT_EQ(1, handler_->numConnections());
EXPECT_EQ(1, TestUtility::findCounter(stats_store_, "downstream_cx_total")->value());
EXPECT_EQ(1, TestUtility::findGauge(stats_store_, "downstream_cx_active")->value());
EXPECT_EQ(3, TestUtility::findCounter(stats_store_, "downstream_cx_overflow")->value());
EXPECT_CALL(*listener1, onDestroy());
EXPECT_CALL(*listener2, onDestroy());
}
TEST_F(ConnectionHandlerTest, RemoveListener) {
InSequence s;
Network::TcpListenerCallbacks* listener_callbacks;
auto listener = new NiceMock<Network::MockListener>();
TestListener* test_listener =
addListener(1, true, false, "test_listener", listener, &listener_callbacks);
handler_->addListener(absl::nullopt, *test_listener, runtime_);
Network::MockConnectionSocket* connection = new NiceMock<Network::MockConnectionSocket>();
EXPECT_CALL(*access_log_, log(_, _, _, _, _));
listener_callbacks->onAccept(Network::ConnectionSocketPtr{connection});
EXPECT_EQ(0UL, handler_->numConnections());
// Test stop/remove of not existent listener.
handler_->stopListeners(0);
handler_->removeListeners(0);
EXPECT_CALL(*listener, onDestroy());
handler_->stopListeners(1);
EXPECT_CALL(dispatcher_, clearDeferredDeleteList());
handler_->removeListeners(1);
EXPECT_EQ(0UL, handler_->numConnections());
// Test stop/remove of not existent listener.
handler_->stopListeners(0);
handler_->removeListeners(0);
}
TEST_F(ConnectionHandlerTest, RemoveListenerWithMultiAddrs) {
InSequence s;
auto listener1 = new NiceMock<Network::MockListener>();
auto listener2 = new NiceMock<Network::MockListener>();
std::vector<Network::Listener*> mock_listeners;
mock_listeners.emplace_back(listener1);
mock_listeners.emplace_back(listener2);
Network::Address::InstanceConstSharedPtr address1(
new Network::Address::Ipv4Instance("127.0.0.1", 80, nullptr));
Network::Address::InstanceConstSharedPtr address2(
new Network::Address::Ipv4Instance("127.0.0.2", 80, nullptr));
std::vector<Network::Address::InstanceConstSharedPtr> addresses;
addresses.emplace_back(address1);
addresses.emplace_back(address2);
Network::TcpListenerCallbacks* listener_callbacks1;
Network::TcpListenerCallbacks* listener_callbacks2;
absl::flat_hash_map<std::string, Network::TcpListenerCallbacks**> listener_callbacks_map;
listener_callbacks_map.emplace(address1->asString(), &listener_callbacks1);
listener_callbacks_map.emplace(address2->asString(), &listener_callbacks2);
absl::flat_hash_map<std::string, Network::ConnectionBalancerSharedPtr> connection_balancers;
TestMultiAddressesListener* test_listener =
addMultiAddrsListener(1, true, false, "test_listener", mock_listeners, addresses,
connection_balancers, listener_callbacks_map);
handler_->addListener(absl::nullopt, *test_listener, runtime_);
Network::MockConnectionSocket* connection = new NiceMock<Network::MockConnectionSocket>();
EXPECT_CALL(*access_log_, log(_, _, _, _, _));
listener_callbacks1->onAccept(Network::ConnectionSocketPtr{connection});
EXPECT_EQ(0UL, handler_->numConnections());
// Test stop/remove of not existent listener.
handler_->stopListeners(0);
handler_->removeListeners(0);
EXPECT_CALL(*listener1, onDestroy());
EXPECT_CALL(*listener2, onDestroy());
handler_->stopListeners(1);
EXPECT_CALL(dispatcher_, clearDeferredDeleteList()).Times(2);
handler_->removeListeners(1);
EXPECT_EQ(0UL, handler_->numConnections());
// Test stop/remove of not existent listener.
handler_->stopListeners(0);
handler_->removeListeners(0);
}
TEST_F(ConnectionHandlerTest, DisableListener) {
InSequence s;
Network::TcpListenerCallbacks* listener_callbacks;
auto listener = new NiceMock<Network::MockListener>();
TestListener* test_listener =
addListener(1, false, false, "test_listener", listener, &listener_callbacks);
handler_->addListener(absl::nullopt, *test_listener, runtime_);
EXPECT_CALL(*listener, disable());
EXPECT_CALL(*listener, onDestroy());
handler_->disableListeners();
}
TEST_F(ConnectionHandlerTest, DisableListenerWithMultiAddrs) {
auto listener1 = new NiceMock<Network::MockListener>();
auto listener2 = new NiceMock<Network::MockListener>();
std::vector<Network::Listener*> mock_listeners;
mock_listeners.emplace_back(listener1);
mock_listeners.emplace_back(listener2);
Network::Address::InstanceConstSharedPtr address1(
new Network::Address::Ipv4Instance("127.0.0.1", 80, nullptr));
Network::Address::InstanceConstSharedPtr address2(
new Network::Address::Ipv4Instance("127.0.0.2", 80, nullptr));
std::vector<Network::Address::InstanceConstSharedPtr> addresses;
addresses.emplace_back(address1);
addresses.emplace_back(address2);
Network::TcpListenerCallbacks* listener_callbacks1;
Network::TcpListenerCallbacks* listener_callbacks2;
absl::flat_hash_map<std::string, Network::TcpListenerCallbacks**> listener_callbacks_map;
listener_callbacks_map.emplace(address1->asString(), &listener_callbacks1);
listener_callbacks_map.emplace(address2->asString(), &listener_callbacks2);
absl::flat_hash_map<std::string, Network::ConnectionBalancerSharedPtr> connection_balancers;
TestMultiAddressesListener* test_listener =
addMultiAddrsListener(1, false, false, "test_listener", mock_listeners, addresses,
connection_balancers, listener_callbacks_map);
handler_->addListener(absl::nullopt, *test_listener, runtime_);
EXPECT_CALL(*listener1, disable());
EXPECT_CALL(*listener2, disable());
EXPECT_CALL(*listener1, onDestroy());
EXPECT_CALL(*listener2, onDestroy());
handler_->disableListeners();
}
TEST_F(ConnectionHandlerTest, RebalanceWithMultiAddressListener) {
auto listener1 = new NiceMock<Network::MockListener>();
auto listener2 = new NiceMock<Network::MockListener>();
std::vector<Network::Listener*> mock_listeners;
mock_listeners.emplace_back(listener1);
mock_listeners.emplace_back(listener2);
Network::Address::InstanceConstSharedPtr address1(
new Network::Address::Ipv4Instance("127.0.0.1", 80, nullptr));
Network::Address::InstanceConstSharedPtr address2(
new Network::Address::Ipv4Instance("127.0.0.2", 80, nullptr));
std::vector<Network::Address::InstanceConstSharedPtr> addresses;
addresses.emplace_back(address1);
addresses.emplace_back(address2);
Network::TcpListenerCallbacks* listener_callbacks1;
Network::TcpListenerCallbacks* listener_callbacks2;
absl::flat_hash_map<std::string, Network::TcpListenerCallbacks**> listener_callbacks_map;
listener_callbacks_map.emplace(address1->asString(), &listener_callbacks1);
listener_callbacks_map.emplace(address2->asString(), &listener_callbacks2);
absl::flat_hash_map<std::string, Network::ConnectionBalancerSharedPtr> connection_balancers;
auto mock_connection_balancer1 = std::make_shared<Network::MockConnectionBalancer>();
auto mock_connection_balancer2 = std::make_shared<Network::MockConnectionBalancer>();
connection_balancers.emplace(address1->asString(), mock_connection_balancer1);
connection_balancers.emplace(address2->asString(), mock_connection_balancer2);
Network::BalancedConnectionHandler* current_handler1;
Network::BalancedConnectionHandler* current_handler2;
EXPECT_CALL(*mock_connection_balancer1, registerHandler(_))
.WillOnce(SaveArgAddress(¤t_handler1));
EXPECT_CALL(*mock_connection_balancer2, registerHandler(_))
.WillOnce(SaveArgAddress(¤t_handler2));
TestMultiAddressesListener* test_listener =
addMultiAddrsListener(1, false, false, "test_listener", mock_listeners, addresses,
connection_balancers, listener_callbacks_map);
handler_->addListener(absl::nullopt, *test_listener, runtime_);
// Send connection to the first listener, expect mock_connection_balancer1 will be called.
// then mock_connection_balancer1 will balance the connection to the same listener.
EXPECT_CALL(*mock_connection_balancer1, pickTargetHandler(_))
.WillOnce(ReturnRef(*current_handler1));
EXPECT_CALL(*access_log_, log(_, _, _, _, _));
EXPECT_CALL(manager_, findFilterChain(_, _)).WillOnce(Return(nullptr));
current_handler1->incNumConnections();
listener_callbacks1->onAccept(std::make_unique<NiceMock<Network::MockConnectionSocket>>());
// Send connection to the second listener, expect mock_connection_balancer2 will be called.
// then mock_connection_balancer2 will balance the connection to the same listener.
EXPECT_CALL(*mock_connection_balancer2, pickTargetHandler(_))
.WillOnce(ReturnRef(*current_handler2));
EXPECT_CALL(*access_log_, log(_, _, _, _, _));
EXPECT_CALL(manager_, findFilterChain(_, _)).WillOnce(Return(nullptr));
current_handler2->incNumConnections();
listener_callbacks2->onAccept(std::make_unique<NiceMock<Network::MockConnectionSocket>>());
EXPECT_CALL(*mock_connection_balancer1, unregisterHandler(_));
EXPECT_CALL(*mock_connection_balancer2, unregisterHandler(_));
EXPECT_CALL(*listener1, onDestroy());
EXPECT_CALL(*listener2, onDestroy());
}
// Envoy doesn't have such case yet, just ensure the code won't break with it.
TEST_F(ConnectionHandlerTest, StopAndDisableStoppedListener) {
InSequence s;
Network::TcpListenerCallbacks* listener_callbacks;
auto listener = new NiceMock<Network::MockListener>();
TestListener* test_listener =
addListener(1, false, false, "test_listener", listener, &listener_callbacks);
handler_->addListener(absl::nullopt, *test_listener, runtime_);
EXPECT_CALL(*listener, onDestroy());
handler_->stopListeners(1);
// Test stop a stopped listener.
handler_->stopListeners(1);
// Test disable a stopped listener.
handler_->disableListeners();
}
TEST_F(ConnectionHandlerTest, AddDisabledListener) {
InSequence s;
Network::TcpListenerCallbacks* listener_callbacks;
auto listener = new NiceMock<Network::MockListener>();
TestListener* test_listener =
addListener(1, false, false, "test_listener", listener, &listener_callbacks);
EXPECT_CALL(*listener, disable());
EXPECT_CALL(*listener, onDestroy());
handler_->disableListeners();
handler_->addListener(absl::nullopt, *test_listener, runtime_);
}
TEST_F(ConnectionHandlerTest, AddDisabledListenerWithMultiAddrs) {
auto listener1 = new NiceMock<Network::MockListener>();
auto listener2 = new NiceMock<Network::MockListener>();
std::vector<Network::Listener*> mock_listeners;
mock_listeners.emplace_back(listener1);
mock_listeners.emplace_back(listener2);
Network::Address::InstanceConstSharedPtr address1(
new Network::Address::Ipv4Instance("127.0.0.1", 80, nullptr));
Network::Address::InstanceConstSharedPtr address2(
new Network::Address::Ipv4Instance("127.0.0.2", 80, nullptr));
std::vector<Network::Address::InstanceConstSharedPtr> addresses;
addresses.emplace_back(address1);
addresses.emplace_back(address2);
Network::TcpListenerCallbacks* listener_callbacks1;
Network::TcpListenerCallbacks* listener_callbacks2;
absl::flat_hash_map<std::string, Network::TcpListenerCallbacks**> listener_callbacks_map;
listener_callbacks_map.emplace(address1->asString(), &listener_callbacks1);
listener_callbacks_map.emplace(address2->asString(), &listener_callbacks2);
absl::flat_hash_map<std::string, Network::ConnectionBalancerSharedPtr> connection_balancers;
TestMultiAddressesListener* test_listener =
addMultiAddrsListener(1, false, false, "test_listener", mock_listeners, addresses,
connection_balancers, listener_callbacks_map, true);
EXPECT_CALL(*listener1, onDestroy());
EXPECT_CALL(*listener2, onDestroy());
handler_->disableListeners();
handler_->addListener(absl::nullopt, *test_listener, runtime_);
}
TEST_F(ConnectionHandlerTest, SetListenerRejectFraction) {
InSequence s;
Network::TcpListenerCallbacks* listener_callbacks;
auto listener = new NiceMock<Network::MockListener>();
TestListener* test_listener =
addListener(1, false, false, "test_listener", listener, &listener_callbacks);
handler_->addListener(absl::nullopt, *test_listener, runtime_);
EXPECT_CALL(*listener, setRejectFraction(UnitFloat(0.1234f)));
EXPECT_CALL(*listener, onDestroy());
handler_->setListenerRejectFraction(UnitFloat(0.1234f));
}
TEST_F(ConnectionHandlerTest, AddListenerSetRejectFraction) {
InSequence s;
Network::TcpListenerCallbacks* listener_callbacks;
auto listener = new NiceMock<Network::MockListener>();
TestListener* test_listener =
addListener(1, false, false, "test_listener", listener, &listener_callbacks);
EXPECT_CALL(*listener, setRejectFraction(UnitFloat(0.12345f)));
EXPECT_CALL(*listener, onDestroy());
handler_->setListenerRejectFraction(UnitFloat(0.12345f));
handler_->addListener(absl::nullopt, *test_listener, runtime_);
}
TEST_F(ConnectionHandlerTest, SetsTransportSocketConnectTimeout) {
InSequence s;
Network::TcpListenerCallbacks* listener_callbacks;
auto listener = new NiceMock<Network::MockListener>();
TestListener* test_listener =
addListener(1, false, false, "test_listener", listener, &listener_callbacks);
handler_->addListener(absl::nullopt, *test_listener, runtime_);
auto server_connection = new NiceMock<Network::MockServerConnection>();
EXPECT_CALL(manager_, findFilterChain(_, _)).WillOnce(Return(filter_chain_.get()));
EXPECT_CALL(dispatcher_, createServerConnection_()).WillOnce(Return(server_connection));
EXPECT_CALL(*filter_chain_, transportSocketConnectTimeout)
.WillOnce(Return(std::chrono::seconds(5)));
EXPECT_CALL(*server_connection,
setTransportSocketConnectTimeout(std::chrono::milliseconds(5 * 1000), _));
EXPECT_CALL(*access_log_, log(_, _, _, _, _));
listener_callbacks->onAccept(std::make_unique<NiceMock<Network::MockConnectionSocket>>());
EXPECT_CALL(*listener, onDestroy());
}
TEST_F(ConnectionHandlerTest, DestroyCloseConnections) {
InSequence s;
Network::TcpListenerCallbacks* listener_callbacks;
auto listener = new NiceMock<Network::MockListener>();
TestListener* test_listener =
addListener(1, true, false, "test_listener", listener, &listener_callbacks);
handler_->addListener(absl::nullopt, *test_listener, runtime_);
Network::MockConnectionSocket* connection = new NiceMock<Network::MockConnectionSocket>();
EXPECT_CALL(*access_log_, log(_, _, _, _, _));
listener_callbacks->onAccept(Network::ConnectionSocketPtr{connection});
EXPECT_EQ(0UL, handler_->numConnections());
EXPECT_CALL(dispatcher_, clearDeferredDeleteList());
EXPECT_CALL(*listener, onDestroy());
handler_.reset();
}
TEST_F(ConnectionHandlerTest, CloseDuringFilterChainCreate) {
InSequence s;
Network::TcpListenerCallbacks* listener_callbacks;
auto listener = new NiceMock<Network::MockListener>();
TestListener* test_listener =
addListener(1, true, false, "test_listener", listener, &listener_callbacks);
handler_->addListener(absl::nullopt, *test_listener, runtime_);
EXPECT_CALL(manager_, findFilterChain(_, _)).WillOnce(Return(filter_chain_.get()));
auto* connection = new NiceMock<Network::MockServerConnection>();
EXPECT_CALL(dispatcher_, createServerConnection_()).WillOnce(Return(connection));
EXPECT_CALL(factory_, createNetworkFilterChain(_, _)).WillOnce(Return(true));
EXPECT_CALL(*connection, state()).WillOnce(Return(Network::Connection::State::Closed));
EXPECT_CALL(*connection, addConnectionCallbacks(_)).Times(0);
EXPECT_CALL(*access_log_, log(_, _, _, _, _));
Network::MockConnectionSocket* accepted_socket = new NiceMock<Network::MockConnectionSocket>();
listener_callbacks->onAccept(Network::ConnectionSocketPtr{accepted_socket});
EXPECT_EQ(0UL, handler_->numConnections());
EXPECT_CALL(*listener, onDestroy());
}
TEST_F(ConnectionHandlerTest, CloseConnectionOnEmptyFilterChain) {
InSequence s;
Network::TcpListenerCallbacks* listener_callbacks;
auto listener = new NiceMock<Network::MockListener>();
TestListener* test_listener =
addListener(1, true, false, "test_listener", listener, &listener_callbacks);
handler_->addListener(absl::nullopt, *test_listener, runtime_);
EXPECT_CALL(manager_, findFilterChain(_, _)).WillOnce(Return(filter_chain_.get()));
auto* connection = new NiceMock<Network::MockServerConnection>();
EXPECT_CALL(dispatcher_, createServerConnection_()).WillOnce(Return(connection));
EXPECT_CALL(factory_, createNetworkFilterChain(_, _)).WillOnce(Return(false));
EXPECT_CALL(*connection, close(Network::ConnectionCloseType::NoFlush, _));
EXPECT_CALL(*connection, addConnectionCallbacks(_)).Times(0);
EXPECT_CALL(*access_log_, log(_, _, _, _, _));
Network::MockConnectionSocket* accepted_socket = new NiceMock<Network::MockConnectionSocket>();
listener_callbacks->onAccept(Network::ConnectionSocketPtr{accepted_socket});
EXPECT_EQ(0UL, handler_->numConnections());
EXPECT_CALL(*listener, onDestroy());
}
TEST_F(ConnectionHandlerTest, NormalRedirect) {
Network::TcpListenerCallbacks* listener_callbacks1;
auto listener1 = new NiceMock<Network::MockListener>();
Network::Address::InstanceConstSharedPtr normal_address(
new Network::Address::Ipv4Instance("127.0.0.1", 10001));
TestListener* test_listener1 =
addListener(1, true, true, "test_listener1", listener1, &listener_callbacks1, normal_address);
handler_->addListener(absl::nullopt, *test_listener1, runtime_);
Network::TcpListenerCallbacks* listener_callbacks2;
auto listener2 = new NiceMock<Network::MockListener>();
Network::Address::InstanceConstSharedPtr alt_address(
new Network::Address::Ipv4Instance("127.0.0.2", 20002));