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/*
*
* Copyright (c) 2021 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.
*/
#pragma once
#include <app/icd/server/ICDServerConfig.h>
#if CHIP_CONFIG_ENABLE_ICD_SERVER
#include <app/icd/server/ICDManager.h> // nogncheck
#endif
#include <app/icd/server/ICDStateObserver.h>
#include <app/server/CommissioningModeProvider.h>
#include <credentials/FabricTable.h>
#include <lib/core/CHIPError.h>
#include <lib/core/Optional.h>
#include <lib/dnssd/Advertiser.h>
#include <platform/CHIPDeviceLayer.h>
#include <stddef.h>
#include <system/TimeSource.h>
namespace chip {
namespace app {
class DLL_EXPORT DnssdServer : public ICDStateObserver
{
public:
static constexpr System::Clock::Timestamp kTimeoutCleared = System::Clock::kZero;
/// Provides the system-wide implementation of the service advertiser
static DnssdServer & Instance()
{
static DnssdServer instance;
return instance;
}
/// Sets the secure Matter port
void SetSecuredPort(uint16_t port) { mSecuredPort = port; }
/// Gets the secure Matter port
uint16_t GetSecuredPort() const { return mSecuredPort; }
/// Sets the unsecure Matter port
void SetUnsecuredPort(uint16_t port) { mUnsecuredPort = port; }
/// Gets the unsecure Matter port
uint16_t GetUnsecuredPort() const { return mUnsecuredPort; }
/// Sets the interface id used for advertising
void SetInterfaceId(Inet::InterfaceId interfaceId) { mInterfaceId = interfaceId; }
/// Gets the interface id used for advertising
Inet::InterfaceId GetInterfaceId() { return mInterfaceId; }
//
// Set the fabric table the DnssdServer should use for operational
// advertising. This must be set before StartServer() is called for the
// first time.
//
void SetFabricTable(FabricTable * table)
{
VerifyOrDie(table != nullptr);
mFabricTable = table;
}
// Set the commissioning mode provider to use. Null provider will mean we
// assume the commissioning mode is kDisabled.
void SetCommissioningModeProvider(CommissioningModeProvider * provider) { mCommissioningModeProvider = provider; }
#if CHIP_DEVICE_CONFIG_ENABLE_EXTENDED_DISCOVERY
/// Sets the extended discovery timeout. Value will be persisted across reboots
void SetExtendedDiscoveryTimeoutSecs(int32_t secs);
/// Callback from Extended Discovery Expiration timer
/// Checks if extended discovery has expired and if so,
/// stops commissionable node advertising
/// Extended Discovery Expiration refers here to commissionable node advertising when NOT in commissioning mode
void OnExtendedDiscoveryExpiration(System::Layer * aSystemLayer, void * aAppState);
#endif // CHIP_DEVICE_CONFIG_ENABLE_EXTENDED_DISCOVERY
#if CHIP_CONFIG_ENABLE_ICD_SERVER
template <class AdvertisingParams>
void AddICDKeyToAdvertisement(AdvertisingParams & advParams);
void SetICDManager(ICDManager * manager) { mICDManager = manager; };
#endif
/// Start operational advertising
CHIP_ERROR AdvertiseOperational();
/// (Re-)starts the Dnssd server, using the commissioning mode from our
/// commissioning mode provider.
void StartServer();
/// (Re-)starts the Dnssd server, using the provided commissioning mode.
void StartServer(Dnssd::CommissioningMode mode);
//// Stop the Dnssd server. After this call, SetFabricTable must be called
//// again before calling StartServer().
void StopServer();
CHIP_ERROR GenerateRotatingDeviceId(char rotatingDeviceIdHexBuffer[], size_t rotatingDeviceIdHexBufferSize);
/// Generates the (random) instance name that a CHIP device is to use for pre-commissioning DNS-SD
CHIP_ERROR GetCommissionableInstanceName(char * buffer, size_t bufferLen);
/**
* @brief Overrides configuration so that commissionable advertisement will use an
* ephemeral discriminator such as one set for ECM. If the Optional has no
* value, the default basic discriminator is used as usual.
*
* @param[in] discriminator Ephemeral discriminator to override if it HasValue(), otherwise reverts
* to default.
* @return CHIP_NO_ERROR on success or CHIP_ERROR_INVALID_ARGUMENT on invalid value
*/
CHIP_ERROR SetEphemeralDiscriminator(Optional<uint16_t> discriminator);
// ICDStateObserver
// No action is needed by the DnssdServer on active or idle state entries
void OnEnterActiveMode() override{};
void OnTransitionToIdle() override{};
void OnICDModeChange() override;
private:
/// Overloaded utility method for commissioner and commissionable advertisement
/// This method is used for both commissioner discovery and commissionable node discovery since
/// they share many fields.
/// commissionableNode = true : advertise commissionable node
/// commissionableNode = false : advertise commissioner
CHIP_ERROR Advertise(bool commissionableNode, chip::Dnssd::CommissioningMode mode);
/// Set MDNS commissioner advertisement
CHIP_ERROR AdvertiseCommissioner();
/// Set MDNS commissionable node advertisement
CHIP_ERROR AdvertiseCommissionableNode(chip::Dnssd::CommissioningMode mode);
//
// Check if we have any valid operational credentials present in the fabric table and return true
// if we do.
//
bool HaveOperationalCredentials();
FabricTable * mFabricTable = nullptr;
CommissioningModeProvider * mCommissioningModeProvider = nullptr;
#if CHIP_CONFIG_ENABLE_ICD_SERVER
ICDManager * mICDManager = nullptr;
#endif // CHIP_CONFIG_ENABLE_ICD_SERVER
uint16_t mSecuredPort = CHIP_PORT;
uint16_t mUnsecuredPort = CHIP_UDC_PORT;
Inet::InterfaceId mInterfaceId = Inet::InterfaceId::Null();
// Ephemeral discriminator to use instead of the default if set
Optional<uint16_t> mEphemeralDiscriminator;
#if CHIP_DEVICE_CONFIG_ENABLE_EXTENDED_DISCOVERY
Time::TimeSource<Time::Source::kSystem> mTimeSource;
/// Get the current extended discovery timeout (set by
/// SetExtendedDiscoveryTimeoutSecs, or the configuration default if not set).
int32_t GetExtendedDiscoveryTimeoutSecs();
/// schedule next extended discovery expiration
CHIP_ERROR ScheduleExtendedDiscoveryExpiration();
// mExtendedDiscoveryExpiration, if not set to kTimeoutCleared, is used to
// indicate that we should be advertising extended discovery right now.
System::Clock::Timestamp mExtendedDiscoveryExpiration = kTimeoutCleared;
Optional<int32_t> mExtendedDiscoveryTimeoutSecs = NullOptional;
// The commissioning mode we are advertising right now. Used to detect when
// we need to start extended discovery advertisement. We start this off as
// kEnabledBasic, so that when we first start up we do extended discovery
// advertisement if we don't enter commissioning mode.
Dnssd::CommissioningMode mCurrentCommissioningMode = Dnssd::CommissioningMode::kEnabledBasic;
#endif // CHIP_DEVICE_CONFIG_ENABLE_EXTENDED_DISCOVERY
};
} // namespace app
} // namespace chip