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state_machine_test.cc
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state_machine_test.cc
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/*
* Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
*/
#include "bgp/state_machine.h"
#include <boost/assign.hpp>
#include <boost/asio.hpp>
#include <boost/foreach.hpp>
#include "base/logging.h"
#include "base/test/task_test_util.h"
#include "net/bgp_af.h"
#include "bgp/bgp_config.h"
#include "bgp/bgp_config_parser.h"
#include "bgp/bgp_factory.h"
#include "bgp/bgp_peer.h"
#include "bgp/bgp_server.h"
#include "bgp/bgp_session.h"
#include "bgp/bgp_session_manager.h"
#include "bgp/bgp_proto.h"
#include "control-node/control_node.h"
#include "io/event_manager.h"
#include "testing/gunit.h"
#include "bgp_message_test.h"
#include "bgp_server_test_util.h"
using namespace std;
using namespace boost::assign;
using namespace boost::posix_time;
class BgpSessionMock : public BgpSession {
public:
enum State {
CONNECT,
ESTABLISHED,
CLOSE,
};
enum Direction {
ACTIVE,
PASSIVE,
};
BgpSessionMock(BgpSessionManager *session, State state, Direction direction)
: BgpSession(session, NULL), state_(state), direction_(direction) {
}
~BgpSessionMock() {
BGP_DEBUG_UT("Session delete");
}
virtual bool Send(const u_int8_t *data, size_t size, size_t *sent) {
return true;
}
virtual bool Connected(Endpoint remote) {
state_ = BgpSessionMock::ESTABLISHED;
EventObserver obs = observer();
if (obs != NULL) {
obs(this, CONNECT_COMPLETE);
}
return true;
}
virtual void AsyncReadStart() {
}
void Close() {
state_ = BgpSessionMock::CLOSE;
BgpSession::Close();
}
State state() { return state_; }
Direction direction() { return direction_; }
private:
State state_;
Direction direction_;
};
class BgpSessionManagerMock : public BgpSessionManager {
public:
BgpSessionManagerMock(EventManager *evm, BgpServer *server)
: BgpSessionManager(evm, server), active_session_(NULL),
passive_session_(NULL), duplicate_session_(NULL),
create_session_fail_(false) {
}
const bool create_session_fail() const { return create_session_fail_; }
void set_create_session_fail(bool flag) { create_session_fail_ = flag; }
virtual TcpSession *CreateSession() {
assert(!active_session_);
// Simulate CreateSession() API failure, such as when the process runs
// out of file descriptors.
if (create_session_fail_) return NULL;
active_session_ =
new BgpSessionMock(this, BgpSessionMock::CONNECT,
BgpSessionMock::ACTIVE);
return active_session_;
}
BgpSessionMock *CreatePassiveSession() {
assert(!passive_session_);
passive_session_ =
new BgpSessionMock(this, BgpSessionMock::ESTABLISHED,
BgpSessionMock::PASSIVE);
return passive_session_;
}
BgpSessionMock *CreateDuplicateSession() {
assert(passive_session_);
assert(!duplicate_session_);
duplicate_session_ =
new BgpSessionMock(this, BgpSessionMock::ESTABLISHED,
BgpSessionMock::PASSIVE);
return duplicate_session_;
}
virtual void Connect(TcpSession *session, Endpoint remote) {
}
virtual void DeleteSession(TcpSession *session) {
if (active_session_ == session) {
active_session_ = NULL;
} else if (passive_session_ == session) {
passive_session_ = NULL;
} else if (duplicate_session_ == session) {
duplicate_session_ = NULL;
} else {
assert(false);
}
delete static_cast<BgpSessionMock *>(session);
}
BgpSessionMock *active_session() { return active_session_; }
BgpSessionMock *passive_session() { return passive_session_; }
BgpSessionMock *duplicate_session() { return duplicate_session_; }
private:
friend class StateMachineTest;
BgpSessionMock *active_session_, *passive_session_, *duplicate_session_;
bool create_session_fail_;
};
class StateMachineTest : public ::testing::Test {
protected:
StateMachineTest() : server_(&evm_, "A"),
timer_(TimerManager::CreateTimer(*evm_.io_service(), "Dummy timer")) {
session_mgr_ =
static_cast<BgpSessionManagerMock *>(server_.session_manager());
server_.Configure(GetConfig());
task_util::WaitForIdle();
string uuid = BgpConfigParser::session_uuid("A", "B", 1);
TASK_UTIL_EXPECT_NE(server_.FindPeerByUuid(
BgpConfigManager::kMasterInstance, uuid),
(BgpPeer *) NULL);
peer_ = server_.FindPeerByUuid(BgpConfigManager::kMasterInstance, uuid);
sm_ = peer_->state_machine();
sm_->set_idle_hold_time(1);
boost::system::error_code ec;
lower_id_ = Ip4Address::from_string("191.168.0.2", ec).to_ulong();
higher_id_ = Ip4Address::from_string("193.168.0.0", ec).to_ulong();
}
~StateMachineTest() {
task_util::WaitForIdle();
server_.Shutdown();
task_util::WaitForIdle();
TimerManager::DeleteTimer(timer_);
evm_.Shutdown();
}
void StopStateMachine() {
sm_->work_queue_.set_disable(true);
}
void StartStateMachine() {
sm_->work_queue_.set_disable(false);
}
virtual void SetUp() {
}
virtual void TearDown() {
}
string GetConfig() {
ostringstream out;
out <<
"<config>\
<bgp-router name=\'A\'>\
<identifier>192.168.0.1</identifier>\
<address>127.0.0.1</address>\
<autonomous-system>10458</autonomous-system>\
<session to='B'/>\
</bgp-router>\
<bgp-router name=\'B\'>\
<address>127.0.0.1</address>\
<autonomous-system>10458</autonomous-system>\
</bgp-router>\
</config>";
return out.str();
}
bool DummyTimerHandler() {
BGP_DEBUG_UT("Dummy handler called");
return false;
}
void RunToState(StateMachine::State state) {
timer_->Start(15000,
boost::bind(&StateMachineTest::DummyTimerHandler, this));
task_util::WaitForIdle();
for (int count = 0; count < 100 && sm_->get_state() != state; count++) {
evm_.RunOnce();
task_util::WaitForIdle();
}
timer_->Cancel();
VerifyState(state);
}
void GetToState(StateMachine::State state) {
switch (state) {
case StateMachine::IDLE: {
EvAdminDown();
VerifyState(state);
break;
}
case StateMachine::ACTIVE: {
GetToState(StateMachine::IDLE);
EvAdminUp();
task_util::WaitForIdle();
EvIdleHoldTimerExpired();
VerifyState(state);
break;
}
case StateMachine::CONNECT: {
GetToState(StateMachine::ACTIVE);
EvConnectTimerExpired();
VerifyState(state);
break;
}
case StateMachine::OPENSENT: {
GetToState(StateMachine::CONNECT);
TcpSession::Endpoint endpoint;
session_mgr_->active_session()->Connected(endpoint);
VerifyState(state);
break;
}
case StateMachine::OPENCONFIRM: {
GetToState(StateMachine::OPENSENT);
BgpProto::OpenMessage *open = new BgpProto::OpenMessage;
BgpMessageTest::GenerateOpenMessage(open);
peer_->ResetCapabilities();
sm_->OnMessage(session_mgr_->active_session(), open);
VerifyState(StateMachine::OPENCONFIRM);
break;
}
case StateMachine::ESTABLISHED: {
GetToState(StateMachine::OPENCONFIRM);
BgpProto::Keepalive *keepalive = new BgpProto::Keepalive;
sm_->OnMessage(session_mgr_->active_session(), keepalive);
VerifyState(StateMachine::ESTABLISHED);
break;
}
default: {
ASSERT_TRUE(false);
break;
}
}
}
void VerifyState(StateMachine::State state) {
task_util::WaitForIdle();
TaskScheduler::GetInstance()->Stop();
BGP_DEBUG_UT("VerifyState " << state);
TASK_UTIL_EXPECT_EQ(state, sm_->get_state());
switch (state) {
case StateMachine::IDLE:
TASK_UTIL_EXPECT_TRUE(!ConnectTimerRunning());
TASK_UTIL_EXPECT_TRUE(!OpenTimerRunning());
TASK_UTIL_EXPECT_TRUE(!HoldTimerRunning());
if (peer_->IsAdminDown()) {
TASK_UTIL_EXPECT_TRUE(!IdleHoldTimerRunning());
} else {
TASK_UTIL_EXPECT_TRUE(IdleHoldTimerRunning());
}
TASK_UTIL_EXPECT_TRUE(sm_->active_session() == NULL);
TASK_UTIL_EXPECT_TRUE(sm_->passive_session() == NULL);
TASK_UTIL_EXPECT_TRUE(!peer_->KeepaliveTimerRunning());
TASK_UTIL_EXPECT_TRUE(peer_->session() == NULL);
break;
case StateMachine::ACTIVE:
TASK_UTIL_EXPECT_TRUE(ConnectTimerRunning() != OpenTimerRunning());
TASK_UTIL_EXPECT_TRUE(!HoldTimerRunning());
TASK_UTIL_EXPECT_TRUE(!IdleHoldTimerRunning());
TASK_UTIL_EXPECT_TRUE(sm_->active_session() == NULL);
TASK_UTIL_EXPECT_TRUE((sm_->passive_session() != NULL) ==
OpenTimerRunning());
TASK_UTIL_EXPECT_TRUE(!peer_->KeepaliveTimerRunning());
TASK_UTIL_EXPECT_TRUE(peer_->session() == NULL);
break;
case StateMachine::CONNECT:
TASK_UTIL_EXPECT_TRUE(ConnectTimerRunning());
TASK_UTIL_EXPECT_TRUE(!HoldTimerRunning());
TASK_UTIL_EXPECT_TRUE(!IdleHoldTimerRunning());
if (!session_mgr_->create_session_fail()) {
TASK_UTIL_EXPECT_TRUE(sm_->active_session() != NULL);
} else {
TASK_UTIL_EXPECT_TRUE(sm_->active_session() == NULL);
}
TASK_UTIL_EXPECT_TRUE((sm_->passive_session() != NULL) ==
OpenTimerRunning());
TASK_UTIL_EXPECT_TRUE(!peer_->KeepaliveTimerRunning());
TASK_UTIL_EXPECT_TRUE(peer_->session() == NULL);
break;
case StateMachine::OPENSENT:
TASK_UTIL_EXPECT_TRUE(!ConnectTimerRunning());
TASK_UTIL_EXPECT_TRUE(HoldTimerRunning());
TASK_UTIL_EXPECT_TRUE(!IdleHoldTimerRunning());
TASK_UTIL_EXPECT_TRUE(sm_->active_session() != NULL ||
sm_->passive_session() != NULL);
TASK_UTIL_EXPECT_TRUE((sm_->passive_session() != NULL) ||
!OpenTimerRunning());
TASK_UTIL_EXPECT_TRUE(!peer_->KeepaliveTimerRunning());
TASK_UTIL_EXPECT_TRUE(peer_->session() == NULL);
break;
case StateMachine::OPENCONFIRM:
TASK_UTIL_EXPECT_TRUE(!ConnectTimerRunning());
TASK_UTIL_EXPECT_TRUE(!OpenTimerRunning());
TASK_UTIL_EXPECT_TRUE(HoldTimerRunning());
TASK_UTIL_EXPECT_TRUE(!IdleHoldTimerRunning());
TASK_UTIL_EXPECT_TRUE(sm_->active_session() == NULL);
TASK_UTIL_EXPECT_TRUE(sm_->passive_session() == NULL);
TASK_UTIL_EXPECT_TRUE(peer_->KeepaliveTimerRunning());
TASK_UTIL_EXPECT_TRUE(peer_->session() != NULL);
break;
case StateMachine::ESTABLISHED:
TASK_UTIL_EXPECT_TRUE(!ConnectTimerRunning());
TASK_UTIL_EXPECT_TRUE(!OpenTimerRunning());
TASK_UTIL_EXPECT_TRUE(HoldTimerRunning());
TASK_UTIL_EXPECT_TRUE(!IdleHoldTimerRunning());
TASK_UTIL_EXPECT_TRUE(sm_->active_session() == NULL);
TASK_UTIL_EXPECT_TRUE(sm_->passive_session() == NULL);
TASK_UTIL_EXPECT_TRUE(peer_->KeepaliveTimerRunning());
TASK_UTIL_EXPECT_TRUE(peer_->session() != NULL);
break;
default:
ASSERT_TRUE(false);
break;
}
TaskScheduler::GetInstance()->Start();
}
void VerifyDirection(BgpSessionMock::Direction direction) {
BgpSession *session = sm_->peer()->session();
BgpSessionMock *mock_session = dynamic_cast<BgpSessionMock *>(session);
ASSERT_TRUE(mock_session != NULL);
TASK_UTIL_EXPECT_TRUE(mock_session->direction() == direction);
}
BgpSessionMock *GetSession(BgpSessionMock *session) {
if (session) return session;
session = session_mgr_->active_session();
if (!session || session->state() != BgpSessionMock::ESTABLISHED) {
if (!session_mgr_->passive_session())
EvTcpPassiveOpen();
session = session_mgr_->passive_session();
}
return session;
}
void EvStart() {
sm_->reset_idle_hold_time();
sm_->Initialize();
}
void EvStop() {
sm_->Shutdown(BgpProto::Notification::AdminShutdown);
}
void EvAdminUp() {
peer_->SetAdminState(false);
sm_->set_idle_hold_time(1);
}
void EvAdminDown() {
peer_->SetAdminState(true);
sm_->set_idle_hold_time(1);
}
void EvConnectTimerExpired() {
sm_->FireConnectTimer();
}
void EvIdleHoldTimerExpired() {
sm_->FireIdleHoldTimer();
}
void EvOpenTimerExpired() {
sm_->FireOpenTimer();
}
void EvTcpPassiveOpen() {
StopStateMachine();
BgpSessionMock *session = session_mgr_->CreatePassiveSession();
TcpSession::Endpoint endpoint;
peer_->AcceptSession(session);
StartStateMachine();
}
void EvTcpDuplicatePassiveOpen() {
StopStateMachine();
BgpSessionMock *session = session_mgr_->CreateDuplicateSession();
TcpSession::Endpoint endpoint;
peer_->AcceptSession(session);
StartStateMachine();
}
void EvOpenTimerExpiredPassive() {
EvTcpPassiveOpen();
task_util::WaitForIdle();
sm_->FireOpenTimer();
}
void EvHoldTimerExpired() {
sm_->FireHoldTimer();
}
void EvTcpConnected() {
sm_->OnSessionEvent(session_mgr_->active_session(),
TcpSession::CONNECT_COMPLETE);
}
void EvTcpConnectFail() {
sm_->OnSessionEvent(session_mgr_->active_session(),
TcpSession::CONNECT_FAILED);
}
void EvTcpClose(BgpSessionMock *session = NULL) {
if (!session) session = session_mgr_->active_session();
sm_->OnSessionEvent(session, TcpSession::CLOSE);
}
void EvBgpHeaderError(BgpSessionMock *session = NULL) {
session = GetSession(session);
ParseErrorContext context;
context.error_code = BgpProto::Notification::MsgHdrErr;
sm_->OnMessageError(session, &context);
}
void EvBgpOpen(BgpSessionMock *session = NULL) {
session = GetSession(session);
BgpProto::OpenMessage *open = new BgpProto::OpenMessage;
BgpMessageTest::GenerateOpenMessage(open);
peer_->ResetCapabilities();
sm_->OnMessage(session, open);
}
void EvBgpOpenCustom(BgpSessionMock *session,
uint32_t identifier = 1, int holdtime = 30) {
BgpProto::OpenMessage *open = new BgpProto::OpenMessage;
BgpMessageTest::GenerateOpenMessage(open);
open->identifier = identifier;
open->holdtime = holdtime;
peer_->ResetCapabilities();
sm_->OnMessage(session, open);
}
void EvBgpOpenError(BgpSessionMock *session = NULL) {
session = GetSession(session);
ParseErrorContext context;
context.error_code = BgpProto::Notification::OpenMsgErr;
sm_->OnMessageError(session, &context);
}
void EvBgpKeepalive(BgpSessionMock *session = NULL) {
session = GetSession(session);
BgpProto::Keepalive *keepalive = new BgpProto::Keepalive;
sm_->OnMessage(session, keepalive);
}
void EvBgpNotification(BgpSessionMock *session = NULL) {
session = GetSession(session);
BgpProto::Notification *notification = new BgpProto::Notification;
sm_->OnMessage(session, notification);
}
void EvBgpUpdate(BgpSessionMock *session = NULL) {
session = GetSession(session);
BgpProto::Update *update = new BgpProto::Update;
BgpMessageTest::GenerateEmptyUpdateMessage(update);
sm_->OnMessage(session, update);
}
void EvBgpUpdateError(BgpSessionMock *session = NULL) {
session = GetSession(session);
ParseErrorContext context;
context.error_code = BgpProto::Notification::UpdateMsgErr;
sm_->OnMessageError(session, &context);
}
bool ConnectTimerRunning() { return sm_->connect_timer_->running(); }
bool OpenTimerRunning() { return sm_->open_timer_->running(); }
bool HoldTimerRunning() { return sm_->hold_timer_->running(); }
bool IdleHoldTimerRunning() { return sm_->idle_hold_timer_->running(); }
EventManager evm_;
BgpServerTest server_;
BgpSessionManagerMock *session_mgr_;
BgpPeer *peer_;
StateMachine *sm_;
Timer *timer_;
uint32_t lower_id_, higher_id_;
};
typedef boost::function<void(void)> EvGen;
struct EvGenComp {
bool operator()(const EvGen &lhs, const EvGen &rhs) const {
return &lhs < &rhs;
}
};
TEST_F(StateMachineTest, Matrix) {
boost::asio::io_service::work work(*evm_.io_service());
typedef map<EvGen, StateMachine::State, EvGenComp> Transitions;
#define TRANSITION(F, E) \
((EvGen) boost::bind(&StateMachineTest_Matrix_Test::F, this), E)
#define TRANSITION2(F, E) \
((EvGen) boost::bind(&StateMachineTest_Matrix_Test::F, this, \
(BgpSessionMock *) NULL), E)
Transitions idle = map_list_of
TRANSITION(EvTcpPassiveOpen, StateMachine::IDLE)
TRANSITION(EvAdminUp, StateMachine::ACTIVE);
Transitions active = map_list_of
TRANSITION(EvStop, StateMachine::IDLE)
TRANSITION(EvAdminDown, StateMachine::IDLE)
TRANSITION(EvHoldTimerExpired, StateMachine::ACTIVE)
TRANSITION2(EvBgpNotification, StateMachine::IDLE)
TRANSITION2(EvBgpKeepalive, StateMachine::IDLE)
TRANSITION2(EvBgpUpdate, StateMachine::IDLE)
TRANSITION2(EvBgpOpenError, StateMachine::IDLE)
TRANSITION2(EvBgpHeaderError, StateMachine::IDLE)
TRANSITION2(EvBgpUpdateError, StateMachine::IDLE)
TRANSITION(EvConnectTimerExpired, StateMachine::CONNECT)
TRANSITION(EvOpenTimerExpired, StateMachine::ACTIVE)
TRANSITION(EvOpenTimerExpiredPassive, StateMachine::OPENSENT)
TRANSITION(EvTcpPassiveOpen, StateMachine::ACTIVE)
TRANSITION2(EvTcpClose, StateMachine::ACTIVE)
TRANSITION2(EvBgpOpen, StateMachine::OPENCONFIRM);
Transitions connect = map_list_of
TRANSITION(EvStop, StateMachine::IDLE)
TRANSITION(EvAdminDown, StateMachine::IDLE)
TRANSITION(EvConnectTimerExpired, StateMachine::ACTIVE)
TRANSITION(EvOpenTimerExpiredPassive, StateMachine::OPENSENT)
TRANSITION(EvTcpConnected, StateMachine::OPENSENT)
TRANSITION(EvTcpConnectFail, StateMachine::ACTIVE)
TRANSITION(EvTcpPassiveOpen, StateMachine::CONNECT)
TRANSITION2(EvTcpClose, StateMachine::ACTIVE)
TRANSITION2(EvBgpOpen, StateMachine::OPENCONFIRM)
TRANSITION2(EvBgpHeaderError, StateMachine::IDLE)
TRANSITION2(EvBgpOpenError, StateMachine::IDLE)
TRANSITION2(EvBgpUpdateError, StateMachine::IDLE)
TRANSITION2(EvBgpNotification, StateMachine::IDLE)
TRANSITION(EvHoldTimerExpired, StateMachine::CONNECT)
TRANSITION2(EvBgpKeepalive, StateMachine::IDLE)
TRANSITION2(EvBgpUpdate, StateMachine::IDLE);
Transitions opensent = map_list_of
TRANSITION(EvStop, StateMachine::IDLE)
TRANSITION(EvAdminDown, StateMachine::IDLE)
TRANSITION(EvTcpPassiveOpen, StateMachine::OPENSENT)
TRANSITION2(EvTcpClose, StateMachine::ACTIVE)
TRANSITION2(EvBgpOpen, StateMachine::OPENCONFIRM)
TRANSITION2(EvBgpHeaderError, StateMachine::IDLE)
TRANSITION2(EvBgpOpenError, StateMachine::IDLE)
TRANSITION2(EvBgpUpdateError, StateMachine::IDLE)
TRANSITION(EvHoldTimerExpired, StateMachine::IDLE)
TRANSITION2(EvBgpKeepalive, StateMachine::IDLE)
TRANSITION2(EvBgpNotification, StateMachine::IDLE)
TRANSITION(EvConnectTimerExpired, StateMachine::OPENSENT)
TRANSITION(EvOpenTimerExpiredPassive, StateMachine::OPENSENT)
TRANSITION2(EvBgpUpdate, StateMachine::IDLE);
Transitions openconfirm = map_list_of
TRANSITION(EvStop, StateMachine::IDLE)
TRANSITION(EvAdminDown, StateMachine::IDLE)
TRANSITION(EvTcpPassiveOpen, StateMachine::OPENCONFIRM)
TRANSITION2(EvBgpOpen, StateMachine::IDLE)
TRANSITION(EvHoldTimerExpired, StateMachine::IDLE)
TRANSITION2(EvBgpKeepalive, StateMachine::ESTABLISHED)
TRANSITION2(EvTcpClose, StateMachine::IDLE)
TRANSITION2(EvBgpHeaderError, StateMachine::IDLE)
TRANSITION2(EvBgpOpenError, StateMachine::IDLE)
TRANSITION2(EvBgpUpdateError, StateMachine::IDLE)
TRANSITION2(EvBgpNotification, StateMachine::IDLE)
TRANSITION(EvConnectTimerExpired, StateMachine::OPENCONFIRM)
TRANSITION(EvOpenTimerExpiredPassive, StateMachine::OPENCONFIRM)
TRANSITION2(EvBgpUpdate, StateMachine::IDLE);
Transitions established = map_list_of
TRANSITION(EvStop, StateMachine::IDLE)
TRANSITION(EvAdminDown, StateMachine::IDLE)
TRANSITION2(EvBgpOpen, StateMachine::IDLE)
TRANSITION(EvHoldTimerExpired, StateMachine::IDLE)
TRANSITION2(EvTcpClose, StateMachine::IDLE)
TRANSITION2(EvBgpKeepalive, StateMachine::ESTABLISHED)
TRANSITION2(EvBgpHeaderError, StateMachine::IDLE)
TRANSITION2(EvBgpOpenError, StateMachine::IDLE)
TRANSITION2(EvBgpUpdateError, StateMachine::IDLE)
TRANSITION2(EvBgpNotification, StateMachine::IDLE)
TRANSITION(EvConnectTimerExpired, StateMachine::ESTABLISHED)
TRANSITION(EvOpenTimerExpired, StateMachine::ESTABLISHED)
TRANSITION(EvTcpPassiveOpen, StateMachine::ESTABLISHED)
TRANSITION2(EvBgpUpdate, StateMachine::ESTABLISHED);
Transitions matrix[] =
{ idle, active, connect, opensent, openconfirm, established };
for (int k = StateMachine::IDLE; k <= StateMachine::ESTABLISHED; k++) {
StateMachine::State i = static_cast<StateMachine::State> (k);
int count = 0;
for (Transitions::iterator j = matrix[i].begin();
j != matrix[i].end(); j++) {
BGP_DEBUG_UT("Starting test " << count++ << " in state " << i
<< " expecting " << j->second << " *********************");
GetToState(i);
j->first();
RunToState(j->second);
// If the final state is IDLE, and the peer is not AdminDown,
// we expect to go to ACTIVE state after the idle hold timer
// expires.
if (j->second == StateMachine::IDLE) {
if (sm_->peer()->IsAdminDown()) {
TASK_UTIL_EXPECT_TRUE(!IdleHoldTimerRunning());
} else {
RunToState(StateMachine::ACTIVE);
}
}
sm_->set_idle_hold_time(1);
}
}
}
//
// Simplest sequence of events to go to Established.
//
TEST_F(StateMachineTest, Basic) {
GetToState(StateMachine::ACTIVE);
EvConnectTimerExpired();
VerifyState(StateMachine::CONNECT);
BgpSessionMock *session = session_mgr_->active_session();
TcpSession::Endpoint endpoint;
session->Connected(endpoint);
VerifyState(StateMachine::OPENSENT);
EvBgpOpen();
VerifyState(StateMachine::OPENCONFIRM);
EvBgpKeepalive();
VerifyState(StateMachine::ESTABLISHED);
}
//
// Simulate EvTcpConnectFail and EvTcpClose.
//
TEST_F(StateMachineTest, ConnectionErrors) {
boost::asio::io_service::work work(*evm_.io_service());
GetToState(StateMachine::CONNECT);
EvTcpConnectFail();
VerifyState(StateMachine::ACTIVE);
EvConnectTimerExpired();
VerifyState(StateMachine::CONNECT);
BgpSessionMock *session = session_mgr_->active_session();
TcpSession::Endpoint endpoint;
session->Connected(endpoint);
VerifyState(StateMachine::OPENSENT);
EvTcpClose();
VerifyState(StateMachine::ACTIVE);
}
//
// Simulate CreateSession failure and verify that we cycle through the
// Connect and Active states till CreateSession eventually succeeds.
//
TEST_F(StateMachineTest, CreateSessionFail) {
// Mark CreateSession() to fail.
session_mgr_->set_create_session_fail(true);
GetToState(StateMachine::ACTIVE);
// Feed a few EvConnectTimerExpired and go through Active/Connect.
for (int i = 0; i < 4; i++) {
EvConnectTimerExpired();
VerifyState(StateMachine::CONNECT);
EvConnectTimerExpired();
VerifyState(StateMachine::ACTIVE);
}
// Restore CreateSession() to succeed.
session_mgr_->set_create_session_fail(false);
// Make sure we can progress beyond Connect.
EvConnectTimerExpired();
VerifyState(StateMachine::CONNECT);
BgpSessionMock *session = session_mgr_->active_session();
TcpSession::Endpoint endpoint;
session->Connected(endpoint);
VerifyState(StateMachine::OPENSENT);
}
//
// First get to Active state and then inject EvConnectTimerExpired and
// EvTcpConnectFail multiple times to cycle through Connect and Active
// states.
//
// Verify that the connect time backs off as expected.
//
TEST_F(StateMachineTest, ConnectTimerBackoff) {
GetToState(StateMachine::ACTIVE);
for (int idx = 0; idx < 10; idx++) {
int connect_time = sm_->GetConnectTime();
if (idx == 0) {
TASK_UTIL_EXPECT_EQ(0, connect_time);
} else if (idx <= 5) {
TASK_UTIL_EXPECT_EQ(1 << (idx -1), connect_time);
} else {
TASK_UTIL_EXPECT_EQ(StateMachine::kConnectInterval, connect_time);
}
EvConnectTimerExpired();
VerifyState(StateMachine::CONNECT);
EvTcpConnectFail();
VerifyState(StateMachine::ACTIVE);
}
EvConnectTimerExpired();
VerifyState(StateMachine::CONNECT);
BgpSessionMock *session = session_mgr_->active_session();
TcpSession::Endpoint endpoint;
session->Connected(endpoint);
VerifyState(StateMachine::OPENSENT);
}
class StateMachineIdleTest : public StateMachineTest {
protected:
virtual void SetUp() {
GetToState(StateMachine::IDLE);
}
virtual void TearDown() {
}
};
// Old State: Idle
// Event: EvTcpPassiveOpen
// New State: Idle
TEST_F(StateMachineIdleTest, TcpPassiveOpen) {
TaskScheduler::GetInstance()->Stop();
EvTcpPassiveOpen();
TaskScheduler::GetInstance()->Start();
VerifyState(StateMachine::IDLE);
TASK_UTIL_EXPECT_TRUE(sm_->active_session() == NULL);
TASK_UTIL_EXPECT_TRUE(sm_->passive_session() == NULL);
// Also verify that we can proceed after this event
GetToState(StateMachine::ACTIVE);
}
// Old State: Idle
// Event: EvAdminUp + EvAdminDown + EvIdleHoldTimerExpired
// New State: Idle
// Intent: IdleHoldTimer expires right after an AdminDown is enqueued.
// We shouldn't proceed beyond the Idle state if this happens.
// Other: Need to make sure that IdleHoldTimer is running when we call
// EvIdleHoldTimerExpired, otherwise no event will be enqueued.
TEST_F(StateMachineIdleTest, AdminUpThenAdminDownThenIdleHoldTimerExpired) {
TaskScheduler::GetInstance()->Stop();
EvAdminUp();
sm_->set_idle_hold_time(StateMachine::kMaxIdleHoldTime);
TaskScheduler::GetInstance()->Start();
VerifyState(StateMachine::IDLE);
TaskScheduler::GetInstance()->Stop();
EvAdminDown();
EvIdleHoldTimerExpired();
TaskScheduler::GetInstance()->Start();
VerifyState(StateMachine::IDLE);
TASK_UTIL_EXPECT_TRUE(sm_->active_session() == NULL);
TASK_UTIL_EXPECT_TRUE(sm_->passive_session() == NULL);
}
// Old State: Idle
// Event: EvTcpPassiveOpen + EvBgpOpen
// New State: Idle
TEST_F(StateMachineIdleTest, TcpPassiveOpenThenBgpOpen) {
TaskScheduler::GetInstance()->Stop();
EvTcpPassiveOpen();
BgpSessionMock *session = session_mgr_->passive_session();
EvBgpOpenCustom(session, lower_id_);
TaskScheduler::GetInstance()->Start();
VerifyState(StateMachine::IDLE);
TASK_UTIL_EXPECT_TRUE(session_mgr_->passive_session() == NULL);
TASK_UTIL_EXPECT_TRUE(session_mgr_->active_session() == NULL);
// Also verify that we can proceed after this event
GetToState(StateMachine::ACTIVE);
}
// Old State: Idle
// Event: EvTcpPassiveOpen + EvStart + EvBgpOpen
// New State: Active
// Messages: None
// Other: Open message is ignored since there's no passive session
// when we process it. The passive session gets closed since
// we are in IDLE state when we process it.
TEST_F(StateMachineIdleTest, TcpPassiveOpenThenStartThenBgpOpen) {
TaskScheduler::GetInstance()->Stop();
EvTcpPassiveOpen();
EvStart();
BgpSessionMock *session = session_mgr_->passive_session();
EvBgpOpenCustom(session, lower_id_);
TaskScheduler::GetInstance()->Start();
VerifyState(StateMachine::ACTIVE);
TASK_UTIL_EXPECT_TRUE(session_mgr_->passive_session() == NULL);
}
// Old State: Idle
// Event: EvTcpPassiveOpen + EvStart + EvConnectTimerExpired + EvBgpOpen
// New State: Connect
// Messages: None
// Other: Open message is ignored since there's no passive session
// when we process it. The passive session gets closed since
// we are in IDLE state when we process it.
TEST_F(StateMachineIdleTest, TcpPassiveOpenThenConnectTimerExpiredThenBgpOpen) {
TaskScheduler::GetInstance()->Stop();
EvTcpPassiveOpen();
EvStart();
EvConnectTimerExpired();
BgpSessionMock *session = session_mgr_->passive_session();
EvBgpOpenCustom(session, lower_id_);
TaskScheduler::GetInstance()->Start();
VerifyState(StateMachine::CONNECT);
TASK_UTIL_EXPECT_TRUE(session_mgr_->passive_session() == NULL);
}
class StateMachineActiveTest : public StateMachineTest {
protected:
virtual void SetUp() {
GetToState(StateMachine::ACTIVE);
}
virtual void TearDown() {
}
};
// Old State: Active
// Event: EvTcpPassiveOpen.
// New State: Active
// Timers: Open timer should be running since we have a passive session.
// Connect timer must have been cancelled on seeing passive session.
// Messages: None.
TEST_F(StateMachineActiveTest, TcpPassiveOpen) {
EvTcpPassiveOpen();
VerifyState(StateMachine::ACTIVE);
TASK_UTIL_EXPECT_TRUE(!ConnectTimerRunning());
TASK_UTIL_EXPECT_TRUE(OpenTimerRunning());
TASK_UTIL_EXPECT_TRUE(sm_->active_session() == NULL);
TASK_UTIL_EXPECT_TRUE(sm_->passive_session() != NULL);
}
// Old State: Active
// Event: EvTcpPassiveOpen + EvTcpPassiveOpen.
// New State: Active
// Timers: Open timer should be running since we have a passive session.
// Connect timer must have been cancelled on seeing passive session.
// Messages: None.
// Other: Original passive session should get closed and deleted, while
// the duplicate passive session becomes the new passive session.
TEST_F(StateMachineActiveTest, DuplicateTcpPassiveOpen) {
EvTcpPassiveOpen();
EvTcpDuplicatePassiveOpen();
VerifyState(StateMachine::ACTIVE);
TASK_UTIL_EXPECT_TRUE(!ConnectTimerRunning());
TASK_UTIL_EXPECT_TRUE(OpenTimerRunning());
TASK_UTIL_EXPECT_TRUE(sm_->active_session() == NULL);
TASK_UTIL_EXPECT_TRUE(sm_->passive_session() != NULL);
TASK_UTIL_EXPECT_TRUE(session_mgr_->passive_session() == NULL);
TASK_UTIL_EXPECT_TRUE(session_mgr_->duplicate_session() != NULL);
}
// Old State: Active
// Event: EvTcpPassiveOpen + EvTcpPassiveOpen + BgpOpen
// New State: Active
// Timers: Open timer should be running since we have a passive session.
// Connect timer must have been cancelled on seeing passive session.
// Messages: None.
// Intent: BgpOpen should be ignored since it's received on stale session.
// Other: Original passive session should get closed and deleted, while
// the duplicate passive session becomes the new passive session.
TEST_F(StateMachineActiveTest, DuplicateTcpPassiveOpenThenStaleBgpOpen) {
TaskScheduler::GetInstance()->Stop();
EvTcpPassiveOpen();
EvTcpDuplicatePassiveOpen();
EvBgpOpen(session_mgr_->passive_session());
TaskScheduler::GetInstance()->Start();
VerifyState(StateMachine::ACTIVE);
TASK_UTIL_EXPECT_TRUE(!ConnectTimerRunning());
TASK_UTIL_EXPECT_TRUE(OpenTimerRunning());
TASK_UTIL_EXPECT_TRUE(sm_->active_session() == NULL);
TASK_UTIL_EXPECT_TRUE(sm_->passive_session() != NULL);
TASK_UTIL_EXPECT_TRUE(session_mgr_->passive_session() == NULL);
TASK_UTIL_EXPECT_TRUE(session_mgr_->duplicate_session() != NULL);
}
// Old State: Active
// Event: EvTcpClose on the passive session.
// New State: Active
// Timers: Open timer should not be running since passive session got closed.
// Connect timer should have been started again.
// Messages: None.
TEST_F(StateMachineActiveTest, TcpPassiveClose) {
EvTcpPassiveOpen();
EvTcpClose(session_mgr_->passive_session());
VerifyState(StateMachine::ACTIVE);
TASK_UTIL_EXPECT_TRUE(ConnectTimerRunning());
TASK_UTIL_EXPECT_TRUE(!OpenTimerRunning());
TASK_UTIL_EXPECT_TRUE(sm_->active_session() == NULL);
TASK_UTIL_EXPECT_TRUE(sm_->passive_session() == NULL);
}
// Old State: Active
// Event: EvOpenTimerExpired
// New State: OpenSent
// Timers: Open timer must not be running since it just expired.
// Messages: Open message sent on passive session.
TEST_F(StateMachineActiveTest, OpenTimerExpiredPassive) {
EvOpenTimerExpiredPassive();
RunToState(StateMachine::OPENSENT);
TASK_UTIL_EXPECT_TRUE(!OpenTimerRunning());
TASK_UTIL_EXPECT_TRUE(sm_->active_session() == NULL);
TASK_UTIL_EXPECT_TRUE(sm_->passive_session() != NULL);
}
// Old State: Active
// Event: EvTcpPassiveOpen + EvConnectTimerExpired
// New State: Active
// Timers: Open timer should be running since we have a passive session.
// Connect timer must not be running since it just expired.
// Messages: None.
//
// Note: The Connect timer has expired before it can be cancelled while
// processing EvTcpPassiveOpen.
TEST_F(StateMachineActiveTest, TcpPassiveOpenThenConnectTimerExpired) {
TaskScheduler::GetInstance()->Stop();
EvTcpPassiveOpen();
EvConnectTimerExpired();
TaskScheduler::GetInstance()->Start();
VerifyState(StateMachine::ACTIVE);
TASK_UTIL_EXPECT_TRUE(!ConnectTimerRunning());
TASK_UTIL_EXPECT_TRUE(OpenTimerRunning());
TASK_UTIL_EXPECT_TRUE(sm_->active_session() == NULL);
TASK_UTIL_EXPECT_TRUE(sm_->passive_session() != NULL);
}
// Parameterize id (higher/lower)
class StateMachineActiveParamTest1 :
public StateMachineActiveTest,
public ::testing::WithParamInterface<bool> {
protected:
virtual void SetUp() {
id_ = GetParam() ? lower_id_ : higher_id_;
StateMachineActiveTest::SetUp();
}
virtual void TearDown() {
StateMachineActiveTest::TearDown();
}
int id_;
};
// Old State: Active
// Event: EvTcpPassiveOpen + EvBgpOpen (from higher or lower id)
// New State: OpenConfirm
// Messages: Open message sent on passive session.
TEST_P(StateMachineActiveParamTest1, TcpPassiveOpenThenBgpOpen) {
EvTcpPassiveOpen();
EvBgpOpenCustom(session_mgr_->passive_session(), id_);
VerifyState(StateMachine::OPENCONFIRM);
VerifyDirection(BgpSessionMock::PASSIVE);
}
INSTANTIATE_TEST_CASE_P(One, StateMachineActiveParamTest1, ::testing::Bool());
// Parameterize id (higher/lower) and holdtime (higher/lower)
typedef std::tr1::tuple<bool, bool> ActiveTestParams2;
class StateMachineActiveParamTest2 :
public StateMachineActiveTest,
public ::testing::WithParamInterface<ActiveTestParams2> {
protected: