<commit_before>/*
 *
 *    Copyright (c) 2020 Project CHIP Authors
 *    Copyright (c) 2018 <NAME>, Inc.
 *    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
 *          Provides the implementation of the Device Layer ConfigurationManager object
 *          for Linux platforms.
 */

#include <platform/internal/CHIPDeviceLayerInternal.h>

#include <app-common/zap-generated/cluster-objects.h>
#include <ifaddrs.h>
#include <lib/core/CHIPVendorIdentifiers.hpp>
#include <lib/support/CodeUtils.h>
#include <lib/support/logging/CHIPLogging.h>
#include <netpacket/packet.h>
#include <platform/CHIPDeviceConfig.h>
#include <platform/ConfigurationManager.h>
#include <platform/DiagnosticDataProvider.h>
#include <platform/Linux/PosixConfig.h>
#include <platform/internal/GenericConfigurationManagerImpl.ipp>

namespace chip {
namespace DeviceLayer {

using namespace ::chip::DeviceLayer::Internal;

ConfigurationManagerImpl & ConfigurationManagerImpl::GetDefaultInstance()
{
    static ConfigurationManagerImpl sInstance;
    return sInstance;
}

CHIP_ERROR ConfigurationManagerImpl::Init()
{
    CHIP_ERROR err;
    uint32_t rebootCount;

    // Force initialization of NVS namespaces if they doesn't already exist.
    err = PosixConfig::EnsureNamespace(PosixConfig::kConfigNamespace_ChipFactory);
    SuccessOrExit(err);
    err = PosixConfig::EnsureNamespace(PosixConfig::kConfigNamespace_ChipConfig);
    SuccessOrExit(err);
    err = PosixConfig::EnsureNamespace(PosixConfig::kConfigNamespace_ChipCounters);
    SuccessOrExit(err);

    // Initialize the generic implementation base class.
    err = Internal::GenericConfigurationManagerImpl<PosixConfig>::Init();
    SuccessOrExit(err);

    if (!PosixConfig::ConfigValueExists(PosixConfig::kConfigKey_VendorId))
    {
        err = StoreVendorId(CHIP_DEVICE_CONFIG_DEVICE_VENDOR_ID);
        SuccessOrExit(err);
    }

    if (!PosixConfig::ConfigValueExists(PosixConfig::kConfigKey_ProductId))
    {
        err = StoreProductId(CHIP_DEVICE_CONFIG_DEVICE_PRODUCT_ID);
        SuccessOrExit(err);
    }

    if (PosixConfig::ConfigValueExists(PosixConfig::kCounterKey_RebootCount))
    {
        err = GetRebootCount(rebootCount);
        SuccessOrExit(err);

        err = StoreRebootCount(rebootCount + 1);
        SuccessOrExit(err);
    }
    else
    {
        // The first boot after factory reset of the Node.
        err = StoreRebootCount(1);
        SuccessOrExit(err);
    }

    if (!PosixConfig::ConfigValueExists(PosixConfig::kCounterKey_TotalOperationalHours))
    {
        err = StoreTotalOperationalHours(0);
        SuccessOrExit(err);
    }

    if (!PosixConfig::ConfigValueExists(PosixConfig::kCounterKey_BootReason))
    {
        err = StoreBootReason(to_underlying(BootReasonType::kUnspecified));
        SuccessOrExit(err);
    }

    if (!PosixConfig::ConfigValueExists(PosixConfig::kConfigKey_RegulatoryLocation))
    {
        uint32_t location = to_underlying(chip::app::Clusters::GeneralCommissioning::RegulatoryLocationType::kIndoor);
        err               = WriteConfigValue(PosixConfig::kConfigKey_RegulatoryLocation, location);
        SuccessOrExit(err);
    }

    if (!PosixConfig::ConfigValueExists(PosixConfig::kConfigKey_LocationCapability))
    {
        uint32_t location = to_underlying(chip::app::Clusters::GeneralCommissioning::RegulatoryLocationType::kIndoorOutdoor);
        err               = WriteConfigValue(PosixConfig::kConfigKey_LocationCapability, location);
        SuccessOrExit(err);
    }

    err = CHIP_NO_ERROR;

exit:
    return err;
}

CHIP_ERROR ConfigurationManagerImpl::GetPrimaryWiFiMACAddress(uint8_t * buf)
{
    struct ifaddrs * addresses = nullptr;
    CHIP_ERROR error           = CHIP_NO_ERROR;
    bool found                 = false;

    VerifyOrExit(getifaddrs(&addresses) == 0, error = CHIP_ERROR_INTERNAL);
    for (auto addr = addresses; addr != nullptr; addr = addr->ifa_next)
    {
        if ((addr->ifa_addr) && (addr->ifa_addr->sa_family == AF_PACKET) && strncmp(addr->ifa_name, "lo", IFNAMSIZ) != 0)
        {
            struct sockaddr_ll * mac = (struct sockaddr_ll *) addr->ifa_addr;
            memcpy(buf, mac->sll_addr, mac->sll_halen);
            found = true;
            break;
        }
    }
    freeifaddrs(addresses);
    if (!found)
    {
        error = CHIP_ERROR_NO_ENDPOINT;<commit_msg>Ensure memcpy of mac lengths does not overflow buffers (#18757)<commit_after>/*
 *
 *    Copyright (c) 2020 Project CHIP Authors
 *    Copyright (c) 2018 Nest Labs, Inc.
 *    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
 *          Provides the implementation of the Device Layer ConfigurationManager object
 *          for Linux platforms.
 */

#include <platform/internal/CHIPDeviceLayerInternal.h>

#include <app-common/zap-generated/cluster-objects.h>
#include <ifaddrs.h>
#include <lib/core/CHIPVendorIdentifiers.hpp>
#include <lib/support/CodeUtils.h>
#include <lib/support/logging/CHIPLogging.h>
#include <netpacket/packet.h>
#include <platform/CHIPDeviceConfig.h>
#include <platform/ConfigurationManager.h>
#include <platform/DiagnosticDataProvider.h>
#include <platform/Linux/PosixConfig.h>
#include <platform/internal/GenericConfigurationManagerImpl.ipp>

#include <algorithm>

namespace chip {
namespace DeviceLayer {

using namespace ::chip::DeviceLayer::Internal;

ConfigurationManagerImpl & ConfigurationManagerImpl::GetDefaultInstance()
{
    static ConfigurationManagerImpl sInstance;
    return sInstance;
}

CHIP_ERROR ConfigurationManagerImpl::Init()
{
    CHIP_ERROR err;
    uint32_t rebootCount;

    // Force initialization of NVS namespaces if they doesn't already exist.
    err = PosixConfig::EnsureNamespace(PosixConfig::kConfigNamespace_ChipFactory);
    SuccessOrExit(err);
    err = PosixConfig::EnsureNamespace(PosixConfig::kConfigNamespace_ChipConfig);
    SuccessOrExit(err);
    err = PosixConfig::EnsureNamespace(PosixConfig::kConfigNamespace_ChipCounters);
    SuccessOrExit(err);

    // Initialize the generic implementation base class.
    err = Internal::GenericConfigurationManagerImpl<PosixConfig>::Init();
    SuccessOrExit(err);

    if (!PosixConfig::ConfigValueExists(PosixConfig::kConfigKey_VendorId))
    {
        err = StoreVendorId(CHIP_DEVICE_CONFIG_DEVICE_VENDOR_ID);
        SuccessOrExit(err);
    }

    if (!PosixConfig::ConfigValueExists(PosixConfig::kConfigKey_ProductId))
    {
        err = StoreProductId(CHIP_DEVICE_CONFIG_DEVICE_PRODUCT_ID);
        SuccessOrExit(err);
    }

    if (PosixConfig::ConfigValueExists(PosixConfig::kCounterKey_RebootCount))
    {
        err = GetRebootCount(rebootCount);
        SuccessOrExit(err);

        err = StoreRebootCount(rebootCount + 1);
        SuccessOrExit(err);
    }
    else
    {
        // The first boot after factory reset of the Node.
        err = StoreRebootCount(1);
        SuccessOrExit(err);
    }

    if (!PosixConfig::ConfigValueExists(PosixConfig::kCounterKey_TotalOperationalHours))
    {
        err = StoreTotalOperationalHours(0);
        SuccessOrExit(err);
    }

    if (!PosixConfig::ConfigValueExists(PosixConfig::kCounterKey_BootReason))
    {
        err = StoreBootReason(to_underlying(BootReasonType::kUnspecified));
        SuccessOrExit(err);
    }

    if (!PosixConfig::ConfigValueExists(PosixConfig::kConfigKey_RegulatoryLocation))
    {
        uint32_t location = to_underlying(chip::app::Clusters::GeneralCommissioning::RegulatoryLocationType::kIndoor);
        err               = WriteConfigValue(PosixConfig::kConfigKey_RegulatoryLocation, location);
        SuccessOrExit(err);
    }

    if (!PosixConfig::ConfigValueExists(PosixConfig::kConfigKey_LocationCapability))
    {
        uint32_t location = to_underlying(chip::app::Clusters::GeneralCommissioning::RegulatoryLocationType::kIndoorOutdoor);
        err               = WriteConfigValue(PosixConfig::kConfigKey_LocationCapability, location);
        SuccessOrExit(err);
    }

    err = CHIP_NO_ERROR;

exit:
    return err;
}

CHIP_ERROR ConfigurationManagerImpl::GetPrimaryWiFiMACAddress(uint8_t * buf)
{
    struct ifaddrs * addresses = nullptr;
    CHIP_ERROR error           = CHIP_NO_ERROR;
    bool found                 = false;

    // TODO: ideally the buffer size should have been passed as a span, however
    //       for now use the size that is validated in GenericConfigurationManagerImpl.ipp
    constexpr size_t kExpectedBufMinSize = ConfigurationManager::kPrimaryMACAddressLength;
    memset(buf, 0, kExpectedBufMinSize);

    VerifyOrExit(getifaddrs(&addresses) == 0, error = CHIP_ERROR_INTERNAL);
    for (auto addr = addresses; addr != nullptr; addr = addr->ifa_next)
    {
        if ((addr->ifa_addr) && (addr->ifa_addr->sa_family == AF_PACKET) && strncmp(addr->ifa_name, "lo", IFNAMSIZ) != 0)
        {
            struct sockaddr_ll * mac = (struct sockaddr_ll *) addr->ifa_addr;
            memcpy(buf, mac->sll_addr, std::min<size_t>(mac->sll_halen, kExpectedBufMinSize));
            found = true;
            break;
        }
    }
    freeifaddrs(addresses);
    if (!found)
    {
        error = CHIP_ERROR_NO_ENDPOINT;
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