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TestReliableMessageProtocol.cpp
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/*
*
* Copyright (c) 2020-2021 Project CHIP Authors
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file
* This file implements unit tests for the ReliableMessageProtocol
* implementation.
*/
#include <app/icd/server/ICDServerConfig.h>
#include <lib/core/CHIPCore.h>
#include <lib/support/CodeUtils.h>
#include <lib/support/UnitTestContext.h>
#include <lib/support/UnitTestRegistration.h>
#include <lib/support/UnitTestUtils.h>
#include <messaging/ReliableMessageContext.h>
#include <messaging/ReliableMessageMgr.h>
#include <messaging/ReliableMessageProtocolConfig.h>
#include <protocols/Protocols.h>
#include <protocols/echo/Echo.h>
#include <transport/SessionManager.h>
#include <transport/TransportMgr.h>
#include <nlbyteorder.h>
#include <nlunit-test.h>
#include <errno.h>
#include <messaging/ExchangeContext.h>
#include <messaging/ExchangeMgr.h>
#include <messaging/Flags.h>
#include <messaging/tests/MessagingContext.h>
#if CHIP_CONFIG_ENABLE_ICD_SERVER
#include <app/icd/server/ICDConfigurationData.h> // nogncheck
#endif
#if CHIP_CRYPTO_PSA
#include "psa/crypto.h"
#endif
namespace {
using namespace chip;
using namespace chip::Inet;
using namespace chip::Transport;
using namespace chip::Messaging;
using namespace chip::Protocols;
using namespace chip::System::Clock::Literals;
const char PAYLOAD[] = "Hello!";
class TestContext : public chip::Test::LoopbackMessagingContext
{
public:
// Performs setup for each individual test in the test suite
void SetUp() override
{
#if CHIP_CRYPTO_PSA
// TODO: use ASSERT_EQ, once transition to pw_unit_test is complete
VerifyOrDie(psa_crypto_init() == PSA_SUCCESS);
#endif
chip::Test::LoopbackMessagingContext::SetUp();
GetSessionAliceToBob()->AsSecureSession()->SetRemoteSessionParameters(GetLocalMRPConfig().ValueOr(GetDefaultMRPConfig()));
GetSessionBobToAlice()->AsSecureSession()->SetRemoteSessionParameters(GetLocalMRPConfig().ValueOr(GetDefaultMRPConfig()));
}
};
class MockAppDelegate : public UnsolicitedMessageHandler, public ExchangeDelegate
{
public:
MockAppDelegate(TestContext & ctx) : mTestContext(ctx) {}
CHIP_ERROR OnUnsolicitedMessageReceived(const PayloadHeader & payloadHeader, ExchangeDelegate *& newDelegate) override
{
// Handle messages by myself
newDelegate = this;
return CHIP_NO_ERROR;
}
CHIP_ERROR OnMessageReceived(ExchangeContext * ec, const PayloadHeader & payloadHeader,
System::PacketBufferHandle && buffer) override
{
IsOnMessageReceivedCalled = true;
if (payloadHeader.IsAckMsg())
{
mReceivedPiggybackAck = true;
}
if (mDropAckResponse)
{
auto * rc = ec->GetReliableMessageContext();
if (rc->HasPiggybackAckPending())
{
// Make sure we don't accidentally retransmit and end up acking
// the retransmit.
rc->GetReliableMessageMgr()->StopTimer();
(void) rc->TakePendingPeerAckMessageCounter();
}
}
if (mExchange != ec)
{
CloseExchangeIfNeeded();
}
if (!mRetainExchange)
{
ec = nullptr;
}
else
{
ec->WillSendMessage();
}
mExchange = ec;
if (mTestSuite != nullptr)
{
NL_TEST_ASSERT(mTestSuite, buffer->TotalLength() == sizeof(PAYLOAD));
NL_TEST_ASSERT(mTestSuite, memcmp(buffer->Start(), PAYLOAD, buffer->TotalLength()) == 0);
}
return CHIP_NO_ERROR;
}
void OnResponseTimeout(ExchangeContext * ec) override { mResponseTimedOut = true; }
void CloseExchangeIfNeeded()
{
if (mExchange != nullptr)
{
mExchange->Close();
mExchange = nullptr;
}
}
void SetDropAckResponse(bool dropResponse)
{
mDropAckResponse = dropResponse;
if (!mDropAckResponse)
{
// Restart the MRP retransmit timer, now that we are not going to be
// dropping acks anymore, so we send out pending retransmits, if
// any, as needed.
mTestContext.GetExchangeManager().GetReliableMessageMgr()->StartTimer();
}
}
bool IsOnMessageReceivedCalled = false;
bool mReceivedPiggybackAck = false;
bool mRetainExchange = false;
bool mResponseTimedOut = false;
ExchangeContext * mExchange = nullptr;
nlTestSuite * mTestSuite = nullptr;
private:
TestContext & mTestContext;
bool mDropAckResponse = false;
};
class MockSessionEstablishmentExchangeDispatch : public Messaging::ApplicationExchangeDispatch
{
public:
bool IsReliableTransmissionAllowed() const override { return mRetainMessageOnSend; }
bool MessagePermitted(Protocols::Id protocol, uint8_t type) override { return true; }
bool IsEncryptionRequired() const override { return mRequireEncryption; }
bool mRetainMessageOnSend = true;
bool mRequireEncryption = false;
};
class MockSessionEstablishmentDelegate : public UnsolicitedMessageHandler, public ExchangeDelegate
{
public:
CHIP_ERROR OnUnsolicitedMessageReceived(const PayloadHeader & payloadHeader, ExchangeDelegate *& newDelegate) override
{
// Handle messages by myself
newDelegate = this;
return CHIP_NO_ERROR;
}
CHIP_ERROR OnMessageReceived(ExchangeContext * ec, const PayloadHeader & payloadHeader,
System::PacketBufferHandle && buffer) override
{
IsOnMessageReceivedCalled = true;
if (mTestSuite != nullptr)
{
NL_TEST_ASSERT(mTestSuite, buffer->TotalLength() == sizeof(PAYLOAD));
NL_TEST_ASSERT(mTestSuite, memcmp(buffer->Start(), PAYLOAD, buffer->TotalLength()) == 0);
}
return CHIP_NO_ERROR;
}
void OnResponseTimeout(ExchangeContext * ec) override {}
virtual ExchangeMessageDispatch & GetMessageDispatch() override { return mMessageDispatch; }
bool IsOnMessageReceivedCalled = false;
MockSessionEstablishmentExchangeDispatch mMessageDispatch;
nlTestSuite * mTestSuite = nullptr;
};
struct BackoffComplianceTestVector
{
uint8_t sendCount;
System::Clock::Timeout backoffBase;
System::Clock::Timeout backoffMin;
System::Clock::Timeout backoffMax;
};
struct BackoffComplianceTestVector theBackoffComplianceTestVector[] = { {
.sendCount = 0,
.backoffBase = System::Clock::Timeout(300),
.backoffMin = System::Clock::Timeout(330),
.backoffMax = System::Clock::Timeout(413),
},
{
.sendCount = 1,
.backoffBase = System::Clock::Timeout(300),
.backoffMin = System::Clock::Timeout(330),
.backoffMax = System::Clock::Timeout(413),
},
{
.sendCount = 2,
.backoffBase = System::Clock::Timeout(300),
.backoffMin = System::Clock::Timeout(528),
.backoffMax = System::Clock::Timeout(661),
},
{
.sendCount = 3,
.backoffBase = System::Clock::Timeout(300),
.backoffMin = System::Clock::Timeout(844),
.backoffMax = System::Clock::Timeout(1057),
},
{
.sendCount = 4,
.backoffBase = System::Clock::Timeout(300),
.backoffMin = System::Clock::Timeout(1351),
.backoffMax = System::Clock::Timeout(1691),
},
{
.sendCount = 5,
.backoffBase = System::Clock::Timeout(300),
.backoffMin = System::Clock::Timeout(2162),
.backoffMax = System::Clock::Timeout(2705),
},
{
.sendCount = 6,
.backoffBase = System::Clock::Timeout(300),
.backoffMin = System::Clock::Timeout(2162),
.backoffMax = System::Clock::Timeout(2705),
},
{
.sendCount = 0,
.backoffBase = System::Clock::Timeout(4000),
.backoffMin = System::Clock::Timeout(4400),
.backoffMax = System::Clock::Timeout(5503),
},
{
.sendCount = 1,
.backoffBase = System::Clock::Timeout(4000),
.backoffMin = System::Clock::Timeout(4400),
.backoffMax = System::Clock::Timeout(5503),
},
{
.sendCount = 2,
.backoffBase = System::Clock::Timeout(4000),
.backoffMin = System::Clock::Timeout(7040),
.backoffMax = System::Clock::Timeout(8805),
},
{
.sendCount = 3,
.backoffBase = System::Clock::Timeout(4000),
.backoffMin = System::Clock::Timeout(11264),
.backoffMax = System::Clock::Timeout(14088),
},
{
.sendCount = 4,
.backoffBase = System::Clock::Timeout(4000),
.backoffMin = System::Clock::Timeout(18022),
.backoffMax = System::Clock::Timeout(22541),
},
{
.sendCount = 5,
.backoffBase = System::Clock::Timeout(4000),
.backoffMin = System::Clock::Timeout(28835),
.backoffMax = System::Clock::Timeout(36065),
},
{
.sendCount = 6,
.backoffBase = System::Clock::Timeout(4000),
.backoffMin = System::Clock::Timeout(28835),
.backoffMax = System::Clock::Timeout(36065),
},
{
// test theoretical worst-case 1-hour interval
.sendCount = 4,
.backoffBase = System::Clock::Timeout(3'600'000),
.backoffMin = System::Clock::Timeout(16'220'160),
.backoffMax = System::Clock::Timeout(20'286'001),
} };
void CheckGetBackoffImpl(nlTestSuite * inSuite, System::Clock::Timeout additionalMRPBackoffTime)
{
ReliableMessageMgr::SetAdditionalMRPBackoffTime(MakeOptional(additionalMRPBackoffTime));
// Run 3x iterations to thoroughly test random jitter always results in backoff within bounds.
for (uint32_t j = 0; j < 3; j++)
{
for (const auto & test : theBackoffComplianceTestVector)
{
System::Clock::Timeout backoff = ReliableMessageMgr::GetBackoff(test.backoffBase, test.sendCount);
System::Clock::Timeout extraBackoff = additionalMRPBackoffTime;
#if CHIP_CONFIG_ENABLE_ICD_SERVER
// If running as an ICD, increase maxBackoff to account for the polling interval
extraBackoff += ICDConfigurationData::GetInstance().GetFastPollingInterval();
#endif
ChipLogProgress(Test, "Backoff base %" PRIu32 " extra %" PRIu32 " # %d: %" PRIu32, test.backoffBase.count(),
extraBackoff.count(), test.sendCount, backoff.count());
NL_TEST_ASSERT(inSuite, backoff >= test.backoffMin + extraBackoff);
NL_TEST_ASSERT(inSuite, backoff <= test.backoffMax + extraBackoff);
}
}
ReliableMessageMgr::SetAdditionalMRPBackoffTime(NullOptional);
}
} // namespace
class TestReliableMessageProtocol
{
public:
static void CheckAddClearRetrans(nlTestSuite * inSuite, void * inContext);
static void CheckResendApplicationMessage(nlTestSuite * inSuite, void * inContext);
static void CheckCloseExchangeAndResendApplicationMessage(nlTestSuite * inSuite, void * inContext);
static void CheckFailedMessageRetainOnSend(nlTestSuite * inSuite, void * inContext);
static void CheckResendApplicationMessageWithPeerExchange(nlTestSuite * inSuite, void * inContext);
static void CheckResendSessionEstablishmentMessageWithPeerExchange(nlTestSuite * inSuite, void * inContext);
static void CheckDuplicateMessage(nlTestSuite * inSuite, void * inContext);
static void CheckDuplicateMessageClosedExchange(nlTestSuite * inSuite, void * inContext);
static void CheckDuplicateOldMessageClosedExchange(nlTestSuite * inSuite, void * inContext);
static void CheckReceiveAfterStandaloneAck(nlTestSuite * inSuite, void * inContext);
static void CheckPiggybackAfterPiggyback(nlTestSuite * inSuite, void * inContext);
static void CheckSendUnsolicitedStandaloneAckMessage(nlTestSuite * inSuite, void * inContext);
static void CheckSendStandaloneAckMessage(nlTestSuite * inSuite, void * inContext);
static void CheckMessageAfterClosed(nlTestSuite * inSuite, void * inContext);
static void CheckUnencryptedMessageReceiveFailure(nlTestSuite * inSuite, void * inContext);
static void CheckLostResponseWithPiggyback(nlTestSuite * inSuite, void * inContext);
static void CheckLostStandaloneAck(nlTestSuite * inSuite, void * inContext);
static void CheckIsPeerActiveNotInitiator(nlTestSuite * inSuite, void * inContext);
static void CheckGetBackoff(nlTestSuite * inSuite, void * inContext);
static void CheckGetBackoffAdditionalTime(nlTestSuite * inSuite, void * inContext);
static void CheckApplicationResponseDelayed(nlTestSuite * inSuite, void * inContext);
static void CheckApplicationResponseNeverComes(nlTestSuite * inSuite, void * inContext);
};
void TestReliableMessageProtocol::CheckAddClearRetrans(nlTestSuite * inSuite, void * inContext)
{
TestContext & ctx = *reinterpret_cast<TestContext *>(inContext);
MockAppDelegate mockAppDelegate(ctx);
ExchangeContext * exchange = ctx.NewExchangeToAlice(&mockAppDelegate);
NL_TEST_ASSERT(inSuite, exchange != nullptr);
ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
ReliableMessageContext * rc = exchange->GetReliableMessageContext();
NL_TEST_ASSERT(inSuite, rm != nullptr);
NL_TEST_ASSERT(inSuite, rc != nullptr);
ReliableMessageMgr::RetransTableEntry * entry;
rm->AddToRetransTable(rc, &entry);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 1);
rm->ClearRetransTable(*entry);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
exchange->Close();
}
/**
* Tests MRP retransmission logic with the following scenario:
*
* DUT = sender, PEER = remote device
*
* 1) DUT configured to use sleepy peer parameters of active = 64ms, idle = 64ms
* 2) DUT sends message attempt #1 to PEER
* - Force PEER to drop message
* - Observe DUT timeout with no ack
* - Confirm MRP backoff interval is correct
* 3) DUT resends message attempt #2 to PEER
* - Force PEER to drop message
* - Observe DUT timeout with no ack
* - Confirm MRP backoff interval is correct
* 4) DUT resends message attempt #3 to PEER
* - Force PEER to drop message
* - Observe DUT timeout with no ack
* - Confirm MRP backoff interval is correct
* 5) DUT resends message attempt #4 to PEER
* - Force PEER to drop message
* - Observe DUT timeout with no ack
* - Confirm MRP backoff interval is correct
* 6) DUT resends message attempt #5 to PEER
* - PEER to acknowledge message
* - Observe DUT signal successful reliable transmission
*/
void TestReliableMessageProtocol::CheckResendApplicationMessage(nlTestSuite * inSuite, void * inContext)
{
TestContext & ctx = *reinterpret_cast<TestContext *>(inContext);
BackoffComplianceTestVector * expectedBackoff;
System::Clock::Timestamp now, startTime;
System::Clock::Timeout timeoutTime, margin;
margin = System::Clock::Timeout(15);
chip::System::PacketBufferHandle buffer = chip::MessagePacketBuffer::NewWithData(PAYLOAD, sizeof(PAYLOAD));
NL_TEST_ASSERT(inSuite, !buffer.IsNull());
CHIP_ERROR err = CHIP_NO_ERROR;
MockAppDelegate mockSender(ctx);
// TODO: temporarily create a SessionHandle from node id, will be fix in PR 3602
ExchangeContext * exchange = ctx.NewExchangeToAlice(&mockSender);
NL_TEST_ASSERT(inSuite, exchange != nullptr);
ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
NL_TEST_ASSERT(inSuite, rm != nullptr);
exchange->GetSessionHandle()->AsSecureSession()->SetRemoteSessionParameters(ReliableMessageProtocolConfig({
System::Clock::Timestamp(300), // CHIP_CONFIG_MRP_LOCAL_IDLE_RETRY_INTERVAL
System::Clock::Timestamp(300), // CHIP_CONFIG_MRP_LOCAL_ACTIVE_RETRY_INTERVAL
}));
// Let's drop the initial message
auto & loopback = ctx.GetLoopback();
loopback.mSentMessageCount = 0;
loopback.mNumMessagesToDrop = 4;
loopback.mDroppedMessageCount = 0;
// Ensure the retransmit table is empty right now
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
// Ensure the exchange stays open after we send (unlike the CheckCloseExchangeAndResendApplicationMessage case), by claiming to
// expect a response.
startTime = System::SystemClock().GetMonotonicTimestamp();
err = exchange->SendMessage(Echo::MsgType::EchoRequest, std::move(buffer), SendMessageFlags::kExpectResponse);
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
ctx.DrainAndServiceIO();
// Ensure the initial message was dropped and was added to retransmit table
NL_TEST_ASSERT(inSuite, loopback.mNumMessagesToDrop == 3);
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 1);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 1);
// Wait for the initial message to fail (should take 330-413ms)
ctx.GetIOContext().DriveIOUntil(1000_ms32, [&] { return loopback.mSentMessageCount >= 2; });
now = System::SystemClock().GetMonotonicTimestamp();
timeoutTime = now - startTime;
ChipLogProgress(Test, "Attempt #1 Timeout : %" PRIu32 "ms", timeoutTime.count());
expectedBackoff = &theBackoffComplianceTestVector[0];
NL_TEST_ASSERT(inSuite, timeoutTime >= expectedBackoff->backoffMin - margin);
startTime = System::SystemClock().GetMonotonicTimestamp();
ctx.DrainAndServiceIO();
// Ensure the 1st retry was dropped, and is still there in the retransmit table
NL_TEST_ASSERT(inSuite, loopback.mSentMessageCount == 2);
NL_TEST_ASSERT(inSuite, loopback.mNumMessagesToDrop == 2);
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 2);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 1);
// Wait for the 1st retry to fail (should take 330-413ms)
ctx.GetIOContext().DriveIOUntil(1000_ms32, [&] { return loopback.mSentMessageCount >= 3; });
now = System::SystemClock().GetMonotonicTimestamp();
timeoutTime = now - startTime;
ChipLogProgress(Test, "Attempt #2 Timeout : %" PRIu32 "ms", timeoutTime.count());
expectedBackoff = &theBackoffComplianceTestVector[1];
NL_TEST_ASSERT(inSuite, timeoutTime >= expectedBackoff->backoffMin - margin);
startTime = System::SystemClock().GetMonotonicTimestamp();
ctx.DrainAndServiceIO();
// Ensure the 2nd retry was dropped, and is still there in the retransmit table
NL_TEST_ASSERT(inSuite, loopback.mSentMessageCount == 3);
NL_TEST_ASSERT(inSuite, loopback.mNumMessagesToDrop == 1);
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 3);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 1);
// Wait for the 2nd retry to fail (should take 528-660ms)
ctx.GetIOContext().DriveIOUntil(1000_ms32, [&] { return loopback.mSentMessageCount >= 4; });
now = System::SystemClock().GetMonotonicTimestamp();
timeoutTime = now - startTime;
ChipLogProgress(Test, "Attempt #3 Timeout : %" PRIu32 "ms", timeoutTime.count());
expectedBackoff = &theBackoffComplianceTestVector[2];
NL_TEST_ASSERT(inSuite, timeoutTime >= expectedBackoff->backoffMin - margin);
startTime = System::SystemClock().GetMonotonicTimestamp();
ctx.DrainAndServiceIO();
// Ensure the 3rd retry was dropped, and is still there in the retransmit table
NL_TEST_ASSERT(inSuite, loopback.mSentMessageCount == 4);
NL_TEST_ASSERT(inSuite, loopback.mNumMessagesToDrop == 0);
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 4);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 1);
// Wait for the 3rd retry to fail (should take 845-1056ms)
ctx.GetIOContext().DriveIOUntil(1500_ms32, [&] { return loopback.mSentMessageCount >= 5; });
now = System::SystemClock().GetMonotonicTimestamp();
timeoutTime = now - startTime;
ChipLogProgress(Test, "Attempt #4 Timeout : %" PRIu32 "ms", timeoutTime.count());
expectedBackoff = &theBackoffComplianceTestVector[3];
NL_TEST_ASSERT(inSuite, timeoutTime >= expectedBackoff->backoffMin - margin);
// Trigger final transmission
ctx.DrainAndServiceIO();
// Ensure the last retransmission was NOT dropped, and the retransmit table is empty, as we should have gotten an ack
NL_TEST_ASSERT(inSuite, loopback.mSentMessageCount >= 5);
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 4);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
exchange->Close();
}
void TestReliableMessageProtocol::CheckCloseExchangeAndResendApplicationMessage(nlTestSuite * inSuite, void * inContext)
{
TestContext & ctx = *reinterpret_cast<TestContext *>(inContext);
chip::System::PacketBufferHandle buffer = chip::MessagePacketBuffer::NewWithData(PAYLOAD, sizeof(PAYLOAD));
NL_TEST_ASSERT(inSuite, !buffer.IsNull());
CHIP_ERROR err = CHIP_NO_ERROR;
MockAppDelegate mockSender(ctx);
// TODO: temporarily create a SessionHandle from node id, will be fixed in PR 3602
ExchangeContext * exchange = ctx.NewExchangeToAlice(&mockSender);
NL_TEST_ASSERT(inSuite, exchange != nullptr);
ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
NL_TEST_ASSERT(inSuite, rm != nullptr);
exchange->GetSessionHandle()->AsSecureSession()->SetRemoteSessionParameters(ReliableMessageProtocolConfig({
64_ms32, // CHIP_CONFIG_MRP_LOCAL_IDLE_RETRY_INTERVAL
64_ms32, // CHIP_CONFIG_MRP_LOCAL_ACTIVE_RETRY_INTERVAL
}));
// Let's drop the initial message
auto & loopback = ctx.GetLoopback();
loopback.mSentMessageCount = 0;
loopback.mNumMessagesToDrop = 2;
loopback.mDroppedMessageCount = 0;
// Ensure the retransmit table is empty right now
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
err = exchange->SendMessage(Echo::MsgType::EchoRequest, std::move(buffer));
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
ctx.DrainAndServiceIO();
// Ensure the message was dropped, and was added to retransmit table
NL_TEST_ASSERT(inSuite, loopback.mNumMessagesToDrop == 1);
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 1);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 1);
// Wait for the first re-transmit (should take 64ms)
ctx.GetIOContext().DriveIOUntil(1000_ms32, [&] { return loopback.mSentMessageCount >= 2; });
ctx.DrainAndServiceIO();
// Ensure the retransmit message was dropped, and is still there in the retransmit table
NL_TEST_ASSERT(inSuite, loopback.mSentMessageCount == 2);
NL_TEST_ASSERT(inSuite, loopback.mNumMessagesToDrop == 0);
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 2);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 1);
// Wait for the second re-transmit (should take 64ms)
ctx.GetIOContext().DriveIOUntil(1000_ms32, [&] { return loopback.mSentMessageCount >= 3; });
ctx.DrainAndServiceIO();
// Ensure the retransmit message was NOT dropped, and the retransmit table is empty, as we should have gotten an ack
NL_TEST_ASSERT(inSuite, loopback.mSentMessageCount >= 3);
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 2);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
}
void TestReliableMessageProtocol::CheckFailedMessageRetainOnSend(nlTestSuite * inSuite, void * inContext)
{
TestContext & ctx = *reinterpret_cast<TestContext *>(inContext);
chip::System::PacketBufferHandle buffer = chip::MessagePacketBuffer::NewWithData(PAYLOAD, sizeof(PAYLOAD));
NL_TEST_ASSERT(inSuite, !buffer.IsNull());
CHIP_ERROR err = CHIP_NO_ERROR;
MockSessionEstablishmentDelegate mockSender;
ExchangeContext * exchange = ctx.NewExchangeToAlice(&mockSender);
NL_TEST_ASSERT(inSuite, exchange != nullptr);
ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
NL_TEST_ASSERT(inSuite, rm != nullptr);
exchange->GetSessionHandle()->AsSecureSession()->SetRemoteSessionParameters(ReliableMessageProtocolConfig({
64_ms32, // CHIP_CONFIG_MRP_LOCAL_IDLE_RETRY_INTERVAL
64_ms32, // CHIP_CONFIG_MRP_LOCAL_ACTIVE_RETRY_INTERVAL
}));
mockSender.mMessageDispatch.mRetainMessageOnSend = false;
// Let's drop the initial message
auto & loopback = ctx.GetLoopback();
loopback.mSentMessageCount = 0;
loopback.mNumMessagesToDrop = 1;
loopback.mDroppedMessageCount = 0;
// Ensure the retransmit table is empty right now
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
err = exchange->SendMessage(Echo::MsgType::EchoRequest, std::move(buffer));
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
ctx.DrainAndServiceIO();
// Ensure the message was dropped
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 1);
// Wait for the first re-transmit (should take 64ms)
ctx.GetIOContext().DriveIOUntil(1000_ms32, [&] { return loopback.mSentMessageCount >= 2; });
ctx.DrainAndServiceIO();
// Ensure the retransmit table is empty, as we did not provide a message to retain
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
}
void TestReliableMessageProtocol::CheckUnencryptedMessageReceiveFailure(nlTestSuite * inSuite, void * inContext)
{
TestContext & ctx = *reinterpret_cast<TestContext *>(inContext);
chip::System::PacketBufferHandle buffer = chip::MessagePacketBuffer::NewWithData(PAYLOAD, sizeof(PAYLOAD));
NL_TEST_ASSERT(inSuite, !buffer.IsNull());
MockSessionEstablishmentDelegate mockReceiver;
CHIP_ERROR err = ctx.GetExchangeManager().RegisterUnsolicitedMessageHandlerForType(Echo::MsgType::EchoRequest, &mockReceiver);
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
// Expect the received messages to be encrypted
mockReceiver.mMessageDispatch.mRequireEncryption = true;
MockSessionEstablishmentDelegate mockSender;
ExchangeContext * exchange = ctx.NewUnauthenticatedExchangeToAlice(&mockSender);
NL_TEST_ASSERT(inSuite, exchange != nullptr);
ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
NL_TEST_ASSERT(inSuite, rm != nullptr);
auto & loopback = ctx.GetLoopback();
loopback.mSentMessageCount = 0;
loopback.mNumMessagesToDrop = 0;
loopback.mDroppedMessageCount = 0;
// We are sending a malicious packet, doesn't expect an ack
err = exchange->SendMessage(Echo::MsgType::EchoRequest, std::move(buffer), SendFlags(SendMessageFlags::kNoAutoRequestAck));
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
ctx.DrainAndServiceIO();
// Test that the message was actually sent (and not dropped)
NL_TEST_ASSERT(inSuite, loopback.mSentMessageCount == 1);
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 0);
// Test that the message was dropped by the receiver
NL_TEST_ASSERT(inSuite, !mockReceiver.IsOnMessageReceivedCalled);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
}
void TestReliableMessageProtocol::CheckResendApplicationMessageWithPeerExchange(nlTestSuite * inSuite, void * inContext)
{
TestContext & ctx = *reinterpret_cast<TestContext *>(inContext);
chip::System::PacketBufferHandle buffer = chip::MessagePacketBuffer::NewWithData(PAYLOAD, sizeof(PAYLOAD));
NL_TEST_ASSERT(inSuite, !buffer.IsNull());
CHIP_ERROR err = CHIP_NO_ERROR;
MockAppDelegate mockReceiver(ctx);
err = ctx.GetExchangeManager().RegisterUnsolicitedMessageHandlerForType(Echo::MsgType::EchoRequest, &mockReceiver);
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
mockReceiver.mTestSuite = inSuite;
MockAppDelegate mockSender(ctx);
ExchangeContext * exchange = ctx.NewExchangeToAlice(&mockSender);
NL_TEST_ASSERT(inSuite, exchange != nullptr);
ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
NL_TEST_ASSERT(inSuite, rm != nullptr);
exchange->GetSessionHandle()->AsSecureSession()->SetRemoteSessionParameters(ReliableMessageProtocolConfig({
64_ms32, // CHIP_CONFIG_MRP_LOCAL_IDLE_RETRY_INTERVAL
64_ms32, // CHIP_CONFIG_MRP_LOCAL_ACTIVE_RETRY_INTERVAL
}));
// Let's drop the initial message
auto & loopback = ctx.GetLoopback();
loopback.mSentMessageCount = 0;
loopback.mNumMessagesToDrop = 1;
loopback.mDroppedMessageCount = 0;
// Ensure the retransmit table is empty right now
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
err = exchange->SendMessage(Echo::MsgType::EchoRequest, std::move(buffer));
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
ctx.DrainAndServiceIO();
// Ensure the message was dropped, and was added to retransmit table
NL_TEST_ASSERT(inSuite, loopback.mNumMessagesToDrop == 0);
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 1);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 1);
NL_TEST_ASSERT(inSuite, !mockReceiver.IsOnMessageReceivedCalled);
// Wait for the first re-transmit (should take 64ms)
ctx.GetIOContext().DriveIOUntil(1000_ms32, [&] { return loopback.mSentMessageCount >= 2; });
ctx.DrainAndServiceIO();
// Ensure the retransmit message was not dropped, and is no longer in the retransmit table
NL_TEST_ASSERT(inSuite, loopback.mSentMessageCount >= 2);
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 1);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
NL_TEST_ASSERT(inSuite, mockReceiver.IsOnMessageReceivedCalled);
mockReceiver.mTestSuite = nullptr;
err = ctx.GetExchangeManager().UnregisterUnsolicitedMessageHandlerForType(Echo::MsgType::EchoRequest);
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
}
void TestReliableMessageProtocol::CheckDuplicateMessageClosedExchange(nlTestSuite * inSuite, void * inContext)
{
TestContext & ctx = *reinterpret_cast<TestContext *>(inContext);
chip::System::PacketBufferHandle buffer = chip::MessagePacketBuffer::NewWithData(PAYLOAD, sizeof(PAYLOAD));
NL_TEST_ASSERT(inSuite, !buffer.IsNull());
CHIP_ERROR err = CHIP_NO_ERROR;
MockAppDelegate mockReceiver(ctx);
err = ctx.GetExchangeManager().RegisterUnsolicitedMessageHandlerForType(Echo::MsgType::EchoRequest, &mockReceiver);
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
mockReceiver.mTestSuite = inSuite;
MockAppDelegate mockSender(ctx);
ExchangeContext * exchange = ctx.NewExchangeToAlice(&mockSender);
NL_TEST_ASSERT(inSuite, exchange != nullptr);
ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
NL_TEST_ASSERT(inSuite, rm != nullptr);
exchange->GetSessionHandle()->AsSecureSession()->SetRemoteSessionParameters(ReliableMessageProtocolConfig({
64_ms32, // CHIP_CONFIG_RMP_DEFAULT_INITIAL_RETRY_INTERVAL
64_ms32, // CHIP_CONFIG_RMP_DEFAULT_ACTIVE_RETRY_INTERVAL
}));
// Let's not drop the message. Expectation is that it is received by the peer, but the ack is dropped
auto & loopback = ctx.GetLoopback();
loopback.mSentMessageCount = 0;
loopback.mNumMessagesToDrop = 0;
loopback.mDroppedMessageCount = 0;
// Drop the ack, and also close the peer exchange
mockReceiver.SetDropAckResponse(true);
mockReceiver.mRetainExchange = false;
// Ensure the retransmit table is empty right now
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
err = exchange->SendMessage(Echo::MsgType::EchoRequest, std::move(buffer));
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
ctx.DrainAndServiceIO();
// Ensure the message was sent
// The ack was dropped, and message was added to the retransmit table
NL_TEST_ASSERT(inSuite, loopback.mSentMessageCount == 1);
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 0);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 1);
// Let's not drop the duplicate message
mockReceiver.SetDropAckResponse(false);
err = ctx.GetExchangeManager().UnregisterUnsolicitedMessageHandlerForType(Echo::MsgType::EchoRequest);
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
// Wait for the first re-transmit and ack (should take 64ms)
ctx.GetIOContext().DriveIOUntil(1000_ms32, [&] { return loopback.mSentMessageCount >= 3; });
ctx.DrainAndServiceIO();
// Ensure the retransmit message was sent and the ack was sent
// and retransmit table was cleared
NL_TEST_ASSERT(inSuite, loopback.mSentMessageCount == 3);
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 0);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
}
void TestReliableMessageProtocol::CheckDuplicateOldMessageClosedExchange(nlTestSuite * inSuite, void * inContext)
{
TestContext & ctx = *reinterpret_cast<TestContext *>(inContext);
chip::System::PacketBufferHandle buffer = chip::MessagePacketBuffer::NewWithData(PAYLOAD, sizeof(PAYLOAD));
NL_TEST_ASSERT(inSuite, !buffer.IsNull());
CHIP_ERROR err = CHIP_NO_ERROR;
MockAppDelegate mockReceiver(ctx);
err = ctx.GetExchangeManager().RegisterUnsolicitedMessageHandlerForType(Echo::MsgType::EchoRequest, &mockReceiver);
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
mockReceiver.mTestSuite = inSuite;
MockAppDelegate mockSender(ctx);
ExchangeContext * exchange = ctx.NewExchangeToAlice(&mockSender);
NL_TEST_ASSERT(inSuite, exchange != nullptr);
ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
NL_TEST_ASSERT(inSuite, rm != nullptr);
exchange->GetSessionHandle()->AsSecureSession()->SetRemoteSessionParameters(ReliableMessageProtocolConfig({
64_ms32, // CHIP_CONFIG_RMP_DEFAULT_INITIAL_RETRY_INTERVAL
64_ms32, // CHIP_CONFIG_RMP_DEFAULT_ACTIVE_RETRY_INTERVAL
}));
// Let's not drop the message. Expectation is that it is received by the peer, but the ack is dropped
auto & loopback = ctx.GetLoopback();
loopback.mSentMessageCount = 0;
loopback.mNumMessagesToDrop = 0;
loopback.mDroppedMessageCount = 0;
// Drop the ack, and also close the peer exchange
mockReceiver.SetDropAckResponse(true);
mockReceiver.mRetainExchange = false;
// Ensure the retransmit table is empty right now
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
err = exchange->SendMessage(Echo::MsgType::EchoRequest, std::move(buffer));
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
ctx.DrainAndServiceIO();
// Ensure the message was sent
// The ack was dropped, and message was added to the retransmit table
NL_TEST_ASSERT(inSuite, loopback.mSentMessageCount == 1);
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 0);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 1);
// Now send CHIP_CONFIG_MESSAGE_COUNTER_WINDOW_SIZE + 2 messages to make
// sure our original message is out of the message counter window. These
// messages can be sent withour MRP, because we are not expecting acks for
// them anyway.
size_t extraMessages = CHIP_CONFIG_MESSAGE_COUNTER_WINDOW_SIZE + 2;
for (size_t i = 0; i < extraMessages; ++i)
{
buffer = chip::MessagePacketBuffer::NewWithData(PAYLOAD, sizeof(PAYLOAD));
NL_TEST_ASSERT(inSuite, !buffer.IsNull());
ExchangeContext * newExchange = ctx.NewExchangeToAlice(&mockSender);
NL_TEST_ASSERT(inSuite, newExchange != nullptr);
mockReceiver.mRetainExchange = false;
// Ensure the retransmit table has our one message right now
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 1);
// Send without MRP.
err = newExchange->SendMessage(Echo::MsgType::EchoRequest, std::move(buffer), SendMessageFlags::kNoAutoRequestAck);
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
ctx.DrainAndServiceIO();
// Ensure the message was sent, but not added to the retransmit table.
NL_TEST_ASSERT(inSuite, loopback.mSentMessageCount == 1 + (i + 1));
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 0);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 1);
}
// Let's not drop the duplicate message's ack.
mockReceiver.SetDropAckResponse(false);
err = ctx.GetExchangeManager().UnregisterUnsolicitedMessageHandlerForType(Echo::MsgType::EchoRequest);
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
// Wait for the first re-transmit and ack (should take 64ms)
rm->StartTimer();
ctx.GetIOContext().DriveIOUntil(1000_ms32, [&] { return loopback.mSentMessageCount >= 3 + extraMessages; });
ctx.DrainAndServiceIO();
// Ensure the retransmit message was sent and the ack was sent
// and retransmit table was cleared
NL_TEST_ASSERT(inSuite, loopback.mSentMessageCount == 3 + extraMessages);
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 0);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
}
void TestReliableMessageProtocol::CheckResendSessionEstablishmentMessageWithPeerExchange(nlTestSuite * inSuite, void * inContext)
{
// Making this static to reduce stack usage, as some platforms have limits on stack size.
static Test::MessagingContext ctx;
TestContext & inctx = *static_cast<TestContext *>(inContext);
CHIP_ERROR err = ctx.InitFromExisting(inctx);
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
chip::System::PacketBufferHandle buffer = chip::MessagePacketBuffer::NewWithData(PAYLOAD, sizeof(PAYLOAD));
NL_TEST_ASSERT(inSuite, !buffer.IsNull());
MockSessionEstablishmentDelegate mockReceiver;
err = ctx.GetExchangeManager().RegisterUnsolicitedMessageHandlerForType(Echo::MsgType::EchoRequest, &mockReceiver);
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
mockReceiver.mTestSuite = inSuite;
MockSessionEstablishmentDelegate mockSender;
ExchangeContext * exchange = ctx.NewUnauthenticatedExchangeToAlice(&mockSender);
NL_TEST_ASSERT(inSuite, exchange != nullptr);
ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
NL_TEST_ASSERT(inSuite, rm != nullptr);
exchange->GetSessionHandle()->AsUnauthenticatedSession()->SetRemoteSessionParameters(ReliableMessageProtocolConfig({
64_ms32, // CHIP_CONFIG_MRP_LOCAL_IDLE_RETRY_INTERVAL
64_ms32, // CHIP_CONFIG_MRP_LOCAL_ACTIVE_RETRY_INTERVAL
}));
// Let's drop the initial message
auto & loopback = inctx.GetLoopback();
loopback.mSentMessageCount = 0;
loopback.mNumMessagesToDrop = 1;
loopback.mDroppedMessageCount = 0;
// Ensure the retransmit table is empty right now
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
err = exchange->SendMessage(Echo::MsgType::EchoRequest, std::move(buffer));
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
inctx.DrainAndServiceIO();
// Ensure the message was dropped, and was added to retransmit table
NL_TEST_ASSERT(inSuite, loopback.mNumMessagesToDrop == 0);
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 1);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 1);
NL_TEST_ASSERT(inSuite, !mockReceiver.IsOnMessageReceivedCalled);
// Wait for the first re-transmit (should take 64ms)
inctx.GetIOContext().DriveIOUntil(1000_ms32, [&] { return loopback.mSentMessageCount >= 2; });
inctx.DrainAndServiceIO();
// Ensure the retransmit message was not dropped, and is no longer in the retransmit table
NL_TEST_ASSERT(inSuite, loopback.mSentMessageCount >= 2);
NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 1);
NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
NL_TEST_ASSERT(inSuite, mockReceiver.IsOnMessageReceivedCalled);
mockReceiver.mTestSuite = nullptr;
err = ctx.GetExchangeManager().UnregisterUnsolicitedMessageHandlerForType(Echo::MsgType::EchoRequest);
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
ctx.ShutdownAndRestoreExisting(inctx);
}
void TestReliableMessageProtocol::CheckDuplicateMessage(nlTestSuite * inSuite, void * inContext)
{
TestContext & ctx = *reinterpret_cast<TestContext *>(inContext);
chip::System::PacketBufferHandle buffer = chip::MessagePacketBuffer::NewWithData(PAYLOAD, sizeof(PAYLOAD));
NL_TEST_ASSERT(inSuite, !buffer.IsNull());
CHIP_ERROR err = CHIP_NO_ERROR;
MockAppDelegate mockReceiver(ctx);
err = ctx.GetExchangeManager().RegisterUnsolicitedMessageHandlerForType(Echo::MsgType::EchoRequest, &mockReceiver);
NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
mockReceiver.mTestSuite = inSuite;
MockAppDelegate mockSender(ctx);
ExchangeContext * exchange = ctx.NewExchangeToAlice(&mockSender);
NL_TEST_ASSERT(inSuite, exchange != nullptr);
ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
NL_TEST_ASSERT(inSuite, rm != nullptr);