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Server.cpp
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Server.cpp
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/*
*
* Copyright (c) 2020 Project CHIP Authors
*
* 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.
*/
#include <app/server/Server.h>
#include <app/InteractionModelEngine.h>
#include <app/server/DataModelHandler.h>
#include <app/server/RendezvousServer.h>
#include <app/server/SessionManager.h>
#include <ble/BLEEndPoint.h>
#include <inet/IPAddress.h>
#include <inet/InetError.h>
#include <inet/InetLayer.h>
#include <mdns/Advertiser.h>
#include <messaging/ExchangeMgr.h>
#include <platform/CHIPDeviceLayer.h>
#include <setup_payload/SetupPayload.h>
#include <support/CodeUtils.h>
#include <support/ErrorStr.h>
#include <support/ReturnMacros.h>
#include <support/logging/CHIPLogging.h>
#include <sys/param.h>
#include <system/SystemPacketBuffer.h>
#include <system/TLVPacketBufferBackingStore.h>
#include <transport/AdminPairingTable.h>
#include <transport/SecureSessionMgr.h>
using namespace ::chip;
using namespace ::chip::Inet;
using namespace ::chip::Transport;
using namespace ::chip::DeviceLayer;
using namespace ::chip::Messaging;
namespace {
bool isRendezvousBypassed()
{
RendezvousInformationFlags rendezvousMode = RendezvousInformationFlags::kBLE;
#ifdef CONFIG_RENDEZVOUS_MODE
rendezvousMode = static_cast<RendezvousInformationFlags>(CONFIG_RENDEZVOUS_MODE);
#endif
#ifdef CHIP_BYPASS_RENDEZVOUS
rendezvousMode = RendezvousInformationFlags::kNone;
#endif
return rendezvousMode == RendezvousInformationFlags::kNone;
}
class DeviceDiscriminatorCache
{
public:
CHIP_ERROR UpdateDiscriminator(uint16_t discriminator)
{
if (!mOriginalDiscriminatorCached)
{
// Cache the original discriminator
ReturnErrorOnFailure(DeviceLayer::ConfigurationMgr().GetSetupDiscriminator(mOriginalDiscriminator));
mOriginalDiscriminatorCached = true;
}
return DeviceLayer::ConfigurationMgr().StoreSetupDiscriminator(discriminator);
}
CHIP_ERROR RestoreDiscriminator()
{
if (mOriginalDiscriminatorCached)
{
// Restore the original discriminator
ReturnErrorOnFailure(DeviceLayer::ConfigurationMgr().StoreSetupDiscriminator(mOriginalDiscriminator));
mOriginalDiscriminatorCached = false;
}
return CHIP_NO_ERROR;
}
private:
bool mOriginalDiscriminatorCached = false;
uint16_t mOriginalDiscriminator = 0;
};
DeviceDiscriminatorCache gDeviceDiscriminatorCache;
class ServerRendezvousAdvertisementDelegate : public RendezvousAdvertisementDelegate
{
public:
CHIP_ERROR StartAdvertisement() const override
{
ReturnErrorOnFailure(chip::DeviceLayer::ConnectivityMgr().SetBLEAdvertisingEnabled(true));
if (mDelegate != nullptr)
{
mDelegate->OnPairingWindowOpened();
}
return CHIP_NO_ERROR;
}
CHIP_ERROR StopAdvertisement() const override
{
gDeviceDiscriminatorCache.RestoreDiscriminator();
ReturnErrorOnFailure(chip::DeviceLayer::ConnectivityMgr().SetBLEAdvertisingEnabled(false));
if (mDelegate != nullptr)
{
mDelegate->OnPairingWindowClosed();
}
return CHIP_NO_ERROR;
}
void SetDelegate(AppDelegate * delegate) { mDelegate = delegate; }
private:
AppDelegate * mDelegate = nullptr;
};
DemoTransportMgr gTransports;
SecureSessionMgr gSessions;
RendezvousServer gRendezvousServer;
AdminPairingTable gAdminPairings;
AdminId gNextAvailableAdminId = 0;
ServerRendezvousAdvertisementDelegate gAdvDelegate;
static CHIP_ERROR OpenPairingWindowUsingVerifier(uint16_t discriminator, PASEVerifier & verifier)
{
RendezvousParameters params;
ReturnErrorOnFailure(gDeviceDiscriminatorCache.UpdateDiscriminator(discriminator));
#if CONFIG_NETWORK_LAYER_BLE
params.SetPASEVerifier(verifier)
.SetBleLayer(DeviceLayer::ConnectivityMgr().GetBleLayer())
.SetPeerAddress(Transport::PeerAddress::BLE())
.SetAdvertisementDelegate(&gAdvDelegate);
#else
params.SetPASEVerifier(verifier);
#endif // CONFIG_NETWORK_LAYER_BLE
AdminId admin = gNextAvailableAdminId;
AdminPairingInfo * adminInfo = gAdminPairings.AssignAdminId(admin);
VerifyOrReturnError(adminInfo != nullptr, CHIP_ERROR_NO_MEMORY);
gNextAvailableAdminId++;
return gRendezvousServer.Init(std::move(params), &gTransports, &gSessions, adminInfo);
}
class ServerCallback : public SecureSessionMgrDelegate
{
public:
void OnMessageReceived(const PacketHeader & header, const PayloadHeader & payloadHeader, SecureSessionHandle session,
System::PacketBufferHandle buffer, SecureSessionMgr * mgr) override
{
auto state = mgr->GetPeerConnectionState(session);
const size_t data_len = buffer->DataLength();
char src_addr[PeerAddress::kMaxToStringSize];
// as soon as a client connects, assume it is connected
VerifyOrExit(!buffer.IsNull(), ChipLogProgress(AppServer, "Received data but couldn't process it..."));
VerifyOrExit(header.GetSourceNodeId().HasValue(), ChipLogProgress(AppServer, "Unknown source for received message"));
VerifyOrExit(state->GetPeerNodeId() != kUndefinedNodeId, ChipLogProgress(AppServer, "Unknown source for received message"));
state->GetPeerAddress().ToString(src_addr, sizeof(src_addr));
ChipLogProgress(AppServer, "Packet received from %s: %zu bytes", src_addr, static_cast<size_t>(data_len));
// TODO: This code is temporary, and must be updated to use the Cluster API.
// Issue: https://github.com/project-chip/connectedhomeip/issues/4725
if (payloadHeader.GetProtocolID() == chip::Protocols::kProtocol_ServiceProvisioning)
{
CHIP_ERROR err = CHIP_NO_ERROR;
uint32_t timeout;
uint16_t discriminator;
PASEVerifier verifier;
ChipLogProgress(AppServer, "Received service provisioning message. Treating it as OpenPairingWindow request");
chip::System::PacketBufferTLVReader reader;
reader.Init(std::move(buffer));
reader.ImplicitProfileId = chip::Protocols::kProtocol_ServiceProvisioning;
SuccessOrExit(reader.Next(kTLVType_UnsignedInteger, DeviceLayer::ProfileTag(reader.ImplicitProfileId, 1)));
SuccessOrExit(reader.Get(timeout));
err = reader.Next(kTLVType_UnsignedInteger, DeviceLayer::ProfileTag(reader.ImplicitProfileId, 2));
if (err == CHIP_NO_ERROR)
{
SuccessOrExit(reader.Get(discriminator));
err = reader.Next(kTLVType_ByteString, DeviceLayer::ProfileTag(reader.ImplicitProfileId, 3));
if (err == CHIP_NO_ERROR)
{
SuccessOrExit(reader.GetBytes(reinterpret_cast<uint8_t *>(verifier), sizeof(verifier)));
}
}
ChipLogProgress(AppServer, "Pairing Window timeout %d seconds", timeout);
if (err != CHIP_NO_ERROR)
{
SuccessOrExit(err = OpenDefaultPairingWindow(false));
}
else
{
ChipLogProgress(AppServer, "Pairing Window discriminator %d", discriminator);
err = OpenPairingWindowUsingVerifier(discriminator, verifier);
SuccessOrExit(err);
}
ChipLogProgress(AppServer, "Opened the pairing window");
}
else
{
HandleDataModelMessage(header.GetSourceNodeId().Value(), std::move(buffer));
}
exit:;
}
void OnReceiveError(CHIP_ERROR error, const Transport::PeerAddress & source, SecureSessionMgr * mgr) override
{
ChipLogProgress(AppServer, "Packet received error: %s", ErrorStr(error));
if (mDelegate != nullptr)
{
mDelegate->OnReceiveError();
}
}
void OnNewConnection(SecureSessionHandle session, SecureSessionMgr * mgr) override
{
ChipLogProgress(AppServer, "Received a new connection.");
}
void SetDelegate(AppDelegate * delegate) { mDelegate = delegate; }
private:
AppDelegate * mDelegate = nullptr;
};
#if CHIP_ENABLE_MDNS
CHIP_ERROR InitMdns()
{
auto & mdnsAdvertiser = Mdns::ServiceAdvertiser::Instance();
// TODO: advertise this only when really operational once we support both
// operational and commisioning advertising is supported.
if (ConfigurationMgr().IsFullyProvisioned())
{
uint64_t fabricId;
if (ConfigurationMgr().GetFabricId(fabricId) != CHIP_NO_ERROR)
{
ChipLogError(Discovery, "Fabric ID not known. Using a default");
fabricId = 5544332211;
}
const auto advertiseParameters = Mdns::OperationalAdvertisingParameters()
.SetFabricId(fabricId)
.SetNodeId(chip::kTestDeviceNodeId)
.SetPort(CHIP_PORT)
.EnableIpV4(true);
ReturnErrorOnFailure(mdnsAdvertiser.Advertise(advertiseParameters));
}
else
{
auto advertiseParameters = Mdns::CommissionAdvertisingParameters().SetPort(CHIP_PORT).EnableIpV4(true);
uint16_t value;
if (ConfigurationMgr().GetVendorId(value) != CHIP_NO_ERROR)
{
ChipLogProgress(Discovery, "Vendor ID not known");
}
else
{
advertiseParameters.SetVendorId(chip::Optional<uint16_t>::Value(value));
}
if (ConfigurationMgr().GetProductId(value) != CHIP_NO_ERROR)
{
ChipLogProgress(Discovery, "Product ID not known");
}
else
{
advertiseParameters.SetProductId(chip::Optional<uint16_t>::Value(value));
}
if (ConfigurationMgr().GetSetupDiscriminator(value) != CHIP_NO_ERROR)
{
ChipLogError(Discovery, "Setup discriminator not known. Using a default.");
value = 840;
}
advertiseParameters.SetShortDiscriminator(static_cast<uint8_t>(value & 0xFF)).SetLongDiscrimininator(value);
ReturnErrorOnFailure(mdnsAdvertiser.Advertise(advertiseParameters));
}
return mdnsAdvertiser.Start(&DeviceLayer::InetLayer, chip::Mdns::kMdnsPort);
}
#endif
#ifdef CHIP_APP_USE_INTERACTION_MODEL
Messaging::ExchangeManager gExchange;
#endif
ServerCallback gCallbacks;
SecurePairingUsingTestSecret gTestPairing;
} // namespace
SecureSessionMgr & chip::SessionManager()
{
return gSessions;
}
CHIP_ERROR OpenDefaultPairingWindow(bool resetAdmins)
{
gDeviceDiscriminatorCache.RestoreDiscriminator();
uint32_t pinCode;
ReturnErrorOnFailure(DeviceLayer::ConfigurationMgr().GetSetupPinCode(pinCode));
RendezvousParameters params;
#if CONFIG_NETWORK_LAYER_BLE
params.SetSetupPINCode(pinCode)
.SetBleLayer(DeviceLayer::ConnectivityMgr().GetBleLayer())
.SetPeerAddress(Transport::PeerAddress::BLE())
.SetAdvertisementDelegate(&gAdvDelegate);
#else
params.SetSetupPINCode(pinCode);
#endif // CONFIG_NETWORK_LAYER_BLE
if (resetAdmins)
{
gNextAvailableAdminId = 0;
gAdminPairings.Reset();
}
AdminId admin = gNextAvailableAdminId;
AdminPairingInfo * adminInfo = gAdminPairings.AssignAdminId(admin);
VerifyOrReturnError(adminInfo != nullptr, CHIP_ERROR_NO_MEMORY);
gNextAvailableAdminId++;
return gRendezvousServer.Init(std::move(params), &gTransports, &gSessions, adminInfo);
}
// The function will initialize datamodel handler and then start the server
// The server assumes the platform's networking has been setup already
void InitServer(AppDelegate * delegate)
{
CHIP_ERROR err = CHIP_NO_ERROR;
Optional<Transport::PeerAddress> peer(Transport::Type::kUndefined);
InitDataModelHandler();
gCallbacks.SetDelegate(delegate);
gRendezvousServer.SetDelegate(delegate);
gAdvDelegate.SetDelegate(delegate);
// Init transport before operations with secure session mgr.
#if INET_CONFIG_ENABLE_IPV4
err = gTransports.Init(UdpListenParameters(&DeviceLayer::InetLayer).SetAddressType(kIPAddressType_IPv6),
UdpListenParameters(&DeviceLayer::InetLayer).SetAddressType(kIPAddressType_IPv4));
#else
err = gTransports.Init(UdpListenParameters(&DeviceLayer::InetLayer).SetAddressType(kIPAddressType_IPv6));
#endif
SuccessOrExit(err);
err = gSessions.Init(chip::kTestDeviceNodeId, &DeviceLayer::SystemLayer, &gTransports, &gAdminPairings);
SuccessOrExit(err);
#ifdef CHIP_APP_USE_INTERACTION_MODEL
err = gExchange.Init(&gSessions);
SuccessOrExit(err);
err = chip::app::InteractionModelEngine::GetInstance()->Init(&gExchange);
SuccessOrExit(err);
#else
gSessions.SetDelegate(&gCallbacks);
#endif
// This flag is used to bypass BLE in the cirque test
// Only in the cirque test this is enabled with --args='bypass_rendezvous=true'
if (isRendezvousBypassed())
{
AdminPairingInfo * adminInfo = gAdminPairings.AssignAdminId(gNextAvailableAdminId);
VerifyOrExit(adminInfo != nullptr, err = CHIP_ERROR_NO_MEMORY);
adminInfo->SetNodeId(chip::kTestDeviceNodeId);
ChipLogProgress(AppServer, "Rendezvous and Secure Pairing skipped. Using test secret.");
err = gSessions.NewPairing(peer, chip::kTestControllerNodeId, &gTestPairing, gNextAvailableAdminId);
SuccessOrExit(err);
}
else if (DeviceLayer::ConnectivityMgr().IsWiFiStationProvisioned() || DeviceLayer::ConnectivityMgr().IsThreadProvisioned())
{
// If the network is already provisioned, proactively disable BLE advertisement.
ChipLogProgress(AppServer, "Network already provisioned. Disabling BLE advertisement");
chip::DeviceLayer::ConnectivityMgr().SetBLEAdvertisingEnabled(false);
}
else
{
SuccessOrExit(err = OpenDefaultPairingWindow(true));
}
#if CHIP_ENABLE_MDNS
err = InitMdns();
SuccessOrExit(err);
#endif
exit:
if (err != CHIP_NO_ERROR)
{
ChipLogError(AppServer, "ERROR setting up transport: %s", ErrorStr(err));
}
else
{
ChipLogProgress(AppServer, "Server Listening...");
}
}