redfish/lib/ethernet.hpp

/*
// Copyright (c) 2018 Intel Corporation
//
// 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 <boost/container/flat_map.hpp>
#include <boost/container/flat_set.hpp>
#include <dbus_singleton.hpp>
#include <error_messages.hpp>
#include <node.hpp>
#include <optional>
#include <utils/json_utils.hpp>
#include <variant>

namespace redfish
{

/**
 * DBus types primitives for several generic DBus interfaces
 * TODO(Pawel) consider move this to separate file into boost::dbus
 */
using PropertiesMapType = boost::container::flat_map<
    std::string, std::variant<std::string, bool, uint8_t, int16_t, uint16_t,
                              int32_t, uint32_t, int64_t, uint64_t, double>>;

using GetManagedObjects = std::vector<std::pair<
    sdbusplus::message::object_path,
    std::vector<std::pair<
        std::string,
        boost::container::flat_map<
            std::string, sdbusplus::message::variant<
                             std::string, bool, uint8_t, int16_t, uint16_t,
                             int32_t, uint32_t, int64_t, uint64_t, double,
                             std::vector<std::string>>>>>>>;

enum class LinkType
{
    Local,
    Global
};

/**
 * Structure for keeping IPv4 data required by Redfish
 */
struct IPv4AddressData
{
    std::string id;
    std::string address;
    std::string domain;
    std::string gateway;
    std::string netmask;
    std::string origin;
    LinkType linktype;

    bool operator<(const IPv4AddressData &obj) const
    {
        return id < obj.id;
    }
};

/**
 * Structure for keeping IPv6 data required by Redfish
 */
struct IPv6AddressData
{
    std::string id;
    std::string address;
    std::string origin;
    uint8_t prefixLength;

    bool operator<(const IPv6AddressData &obj) const
    {
        return id < obj.id;
    }
};
/**
 * Structure for keeping basic single Ethernet Interface information
 * available from DBus
 */
struct EthernetInterfaceData
{
    uint32_t speed;
    bool auto_neg;
    bool DHCPEnabled;
    std::string hostname;
    std::string default_gateway;
    std::string ipv6_default_gateway;
    std::string mac_address;
    std::vector<std::uint32_t> vlan_id;
    std::vector<std::string> nameservers;
};

// Helper function that changes bits netmask notation (i.e. /24)
// into full dot notation
inline std::string getNetmask(unsigned int bits)
{
    uint32_t value = 0xffffffff << (32 - bits);
    std::string netmask = std::to_string((value >> 24) & 0xff) + "." +
                          std::to_string((value >> 16) & 0xff) + "." +
                          std::to_string((value >> 8) & 0xff) + "." +
                          std::to_string(value & 0xff);
    return netmask;
}

inline std::string
    translateAddressOriginDbusToRedfish(const std::string &inputOrigin,
                                        bool isIPv4)
{
    if (inputOrigin == "xyz.openbmc_project.Network.IP.AddressOrigin.Static")
    {
        return "Static";
    }
    if (inputOrigin == "xyz.openbmc_project.Network.IP.AddressOrigin.LinkLocal")
    {
        if (isIPv4)
        {
            return "IPv4LinkLocal";
        }
        else
        {
            return "LinkLocal";
        }
    }
    if (inputOrigin == "xyz.openbmc_project.Network.IP.AddressOrigin.DHCP")
    {
        if (isIPv4)
        {
            return "DHCP";
        }
        else
        {
            return "DHCPv6";
        }
    }
    if (inputOrigin == "xyz.openbmc_project.Network.IP.AddressOrigin.SLAAC")
    {
        return "SLAAC";
    }
    return "";
}

inline bool extractEthernetInterfaceData(const std::string &ethiface_id,
                                         const GetManagedObjects &dbus_data,
                                         EthernetInterfaceData &ethData)
{
    bool idFound = false;
    for (const auto &objpath : dbus_data)
    {
        for (const auto &ifacePair : objpath.second)
        {
            if (objpath.first == "/xyz/openbmc_project/network/" + ethiface_id)
            {
                idFound = true;
                if (ifacePair.first == "xyz.openbmc_project.Network.MACAddress")
                {
                    for (const auto &propertyPair : ifacePair.second)
                    {
                        if (propertyPair.first == "MACAddress")
                        {
                            const std::string *mac =
                                std::get_if<std::string>(&propertyPair.second);
                            if (mac != nullptr)
                            {
                                ethData.mac_address = *mac;
                            }
                        }
                    }
                }
                else if (ifacePair.first == "xyz.openbmc_project.Network.VLAN")
                {
                    for (const auto &propertyPair : ifacePair.second)
                    {
                        if (propertyPair.first == "Id")
                        {
                            const uint32_t *id =
                                std::get_if<uint32_t>(&propertyPair.second);
                            if (id != nullptr)
                            {
                                ethData.vlan_id.push_back(*id);
                            }
                        }
                    }
                }
                else if (ifacePair.first ==
                         "xyz.openbmc_project.Network.EthernetInterface")
                {
                    for (const auto &propertyPair : ifacePair.second)
                    {
                        if (propertyPair.first == "AutoNeg")
                        {
                            const bool *auto_neg =
                                std::get_if<bool>(&propertyPair.second);
                            if (auto_neg != nullptr)
                            {
                                ethData.auto_neg = *auto_neg;
                            }
                        }
                        else if (propertyPair.first == "Speed")
                        {
                            const uint32_t *speed =
                                std::get_if<uint32_t>(&propertyPair.second);
                            if (speed != nullptr)
                            {
                                ethData.speed = *speed;
                            }
                        }
                        else if (propertyPair.first == "Nameservers")
                        {
                            const std::vector<std::string> *nameservers =
                                sdbusplus::message::variant_ns::get_if<
                                    std::vector<std::string>>(
                                    &propertyPair.second);
                            if (nameservers != nullptr)
                            {
                                ethData.nameservers = std::move(*nameservers);
                            }
                        }
                        else if (propertyPair.first == "DHCPEnabled")
                        {
                            const bool *DHCPEnabled =
                                std::get_if<bool>(&propertyPair.second);
                            if (DHCPEnabled != nullptr)
                            {
                                ethData.DHCPEnabled = *DHCPEnabled;
                            }
                        }
                    }
                }
            }
            // System configuration shows up in the global namespace, so no need
            // to check eth number
            if (ifacePair.first ==
                "xyz.openbmc_project.Network.SystemConfiguration")
            {
                for (const auto &propertyPair : ifacePair.second)
                {
                    if (propertyPair.first == "HostName")
                    {
                        const std::string *hostname =
                            sdbusplus::message::variant_ns::get_if<std::string>(
                                &propertyPair.second);
                        if (hostname != nullptr)
                        {
                            ethData.hostname = *hostname;
                        }
                    }
                    else if (propertyPair.first == "DefaultGateway")
                    {
                        const std::string *defaultGateway =
                            sdbusplus::message::variant_ns::get_if<std::string>(
                                &propertyPair.second);
                        if (defaultGateway != nullptr)
                        {
                            ethData.default_gateway = *defaultGateway;
                        }
                    }
                    else if (propertyPair.first == "DefaultGateway6")
                    {
                        const std::string *defaultGateway6 =
                            sdbusplus::message::variant_ns::get_if<std::string>(
                                &propertyPair.second);
                        if (defaultGateway6 != nullptr)
                        {
                            ethData.ipv6_default_gateway = *defaultGateway6;
                        }
                    }
                }
            }
        }
    }
    return idFound;
}

// Helper function that extracts data for single ethernet ipv6 address
inline void extractIPV6Data(
    const std::string &ethiface_id, const GetManagedObjects &dbus_data,
    boost::container::flat_set<IPv6AddressData> &ipv6_config,
    boost::container::flat_set<IPv6AddressData> &ipv6_static_config)
{
    const std::string ipv6PathStart =
        "/xyz/openbmc_project/network/" + ethiface_id + "/ipv6/";

    // Since there might be several IPv6 configurations aligned with
    // single ethernet interface, loop over all of them
    for (const auto &objpath : dbus_data)
    {
        // Check if proper pattern for object path appears
        if (boost::starts_with(objpath.first.str, ipv6PathStart))
        {
            for (auto &interface : objpath.second)
            {
                if (interface.first == "xyz.openbmc_project.Network.IP")
                {
                    // Instance IPv6AddressData structure, and set as
                    // appropriate
                    std::pair<
                        boost::container::flat_set<IPv6AddressData>::iterator,
                        bool>
                        it = ipv6_config.insert(
                            {objpath.first.str.substr(ipv6PathStart.size())});
                    IPv6AddressData &ipv6_address = *it.first;
                    for (auto &property : interface.second)
                    {
                        if (property.first == "Address")
                        {
                            const std::string *address =
                                std::get_if<std::string>(&property.second);
                            if (address != nullptr)
                            {
                                ipv6_address.address = *address;
                            }
                        }
                        else if (property.first == "Origin")
                        {
                            const std::string *origin =
                                std::get_if<std::string>(&property.second);
                            if (origin != nullptr)
                            {
                                ipv6_address.origin =
                                    translateAddressOriginDbusToRedfish(*origin,
                                                                        false);
                            }
                        }
                        else if (property.first == "PrefixLength")
                        {
                            const uint8_t *prefix =
                                std::get_if<uint8_t>(&property.second);
                            if (prefix != nullptr)
                            {
                                ipv6_address.prefixLength = *prefix;
                            }
                        }
                        else
                        {
                            BMCWEB_LOG_ERROR
                                << "Got extra property: " << property.first
                                << " on the " << objpath.first.str << " object";
                        }
                    }
                    if (ipv6_address.origin == "Static")
                    {
                        std::pair<boost::container::flat_set<
                                      IPv6AddressData>::iterator,
                                  bool>
                            iter = ipv6_static_config.insert(
                                {objpath.first.str.substr(
                                    ipv6PathStart.size())});
                        IPv6AddressData &ipv6_static_address = *iter.first;

                        ipv6_static_address.address = ipv6_address.address;
                        ipv6_static_address.prefixLength =
                            ipv6_address.prefixLength;
                    }
                }
            }
        }
    }
}

// Helper function that extracts data for single ethernet ipv4 address
inline void
    extractIPData(const std::string &ethiface_id,
                  const GetManagedObjects &dbus_data,
                  boost::container::flat_set<IPv4AddressData> &ipv4_config)
{
    const std::string ipv4PathStart =
        "/xyz/openbmc_project/network/" + ethiface_id + "/ipv4/";

    // Since there might be several IPv4 configurations aligned with
    // single ethernet interface, loop over all of them
    for (const auto &objpath : dbus_data)
    {
        // Check if proper pattern for object path appears
        if (boost::starts_with(objpath.first.str, ipv4PathStart))
        {
            for (auto &interface : objpath.second)
            {
                if (interface.first == "xyz.openbmc_project.Network.IP")
                {
                    // Instance IPv4AddressData structure, and set as
                    // appropriate
                    std::pair<
                        boost::container::flat_set<IPv4AddressData>::iterator,
                        bool>
                        it = ipv4_config.insert(
                            {objpath.first.str.substr(ipv4PathStart.size())});
                    IPv4AddressData &ipv4_address = *it.first;
                    for (auto &property : interface.second)
                    {
                        if (property.first == "Address")
                        {
                            const std::string *address =
                                std::get_if<std::string>(&property.second);
                            if (address != nullptr)
                            {
                                ipv4_address.address = *address;
                            }
                        }
                        else if (property.first == "Gateway")
                        {
                            const std::string *gateway =
                                std::get_if<std::string>(&property.second);
                            if (gateway != nullptr)
                            {
                                ipv4_address.gateway = *gateway;
                            }
                        }
                        else if (property.first == "Origin")
                        {
                            const std::string *origin =
                                std::get_if<std::string>(&property.second);
                            if (origin != nullptr)
                            {
                                ipv4_address.origin =
                                    translateAddressOriginDbusToRedfish(*origin,
                                                                        true);
                            }
                        }
                        else if (property.first == "PrefixLength")
                        {
                            const uint8_t *mask =
                                std::get_if<uint8_t>(&property.second);
                            if (mask != nullptr)
                            {
                                // convert it to the string
                                ipv4_address.netmask = getNetmask(*mask);
                            }
                        }
                        else
                        {
                            BMCWEB_LOG_ERROR
                                << "Got extra property: " << property.first
                                << " on the " << objpath.first.str << " object";
                        }
                    }
                    // Check if given address is local, or global
                    ipv4_address.linktype =
                        boost::starts_with(ipv4_address.address, "169.254.")
                            ? LinkType::Local
                            : LinkType::Global;
                }
            }
        }
    }
}

/**
 * @brief Sets given Id on the given VLAN interface through D-Bus
 *
 * @param[in] ifaceId       Id of VLAN interface that should be modified
 * @param[in] inputVlanId   New ID of the VLAN
 * @param[in] callback      Function that will be called after the operation
 *
 * @return None.
 */
template <typename CallbackFunc>
void changeVlanId(const std::string &ifaceId, const uint32_t &inputVlanId,
                  CallbackFunc &&callback)
{
    crow::connections::systemBus->async_method_call(
        callback, "xyz.openbmc_project.Network",
        std::string("/xyz/openbmc_project/network/") + ifaceId,
        "org.freedesktop.DBus.Properties", "Set",
        "xyz.openbmc_project.Network.VLAN", "Id",
        std::variant<uint32_t>(inputVlanId));
}

/**
 * @brief Helper function that verifies IP address to check if it is in
 *        proper format. If bits pointer is provided, also calculates active
 *        bit count for Subnet Mask.
 *
 * @param[in]  ip     IP that will be verified
 * @param[out] bits   Calculated mask in bits notation
 *
 * @return true in case of success, false otherwise
 */
inline bool ipv4VerifyIpAndGetBitcount(const std::string &ip,
                                       uint8_t *bits = nullptr)
{
    std::vector<std::string> bytesInMask;

    boost::split(bytesInMask, ip, boost::is_any_of("."));

    static const constexpr int ipV4AddressSectionsCount = 4;
    if (bytesInMask.size() != ipV4AddressSectionsCount)
    {
        return false;
    }

    if (bits != nullptr)
    {
        *bits = 0;
    }

    char *endPtr;
    long previousValue = 255;
    bool firstZeroInByteHit;
    for (const std::string &byte : bytesInMask)
    {
        if (byte.empty())
        {
            return false;
        }

        // Use strtol instead of stroi to avoid exceptions
        long value = std::strtol(byte.c_str(), &endPtr, 10);

        // endPtr should point to the end of the string, otherwise given string
        // is not 100% number
        if (*endPtr != '\0')
        {
            return false;
        }

        // Value should be contained in byte
        if (value < 0 || value > 255)
        {
            return false;
        }

        if (bits != nullptr)
        {
            // Mask has to be continuous between bytes
            if (previousValue != 255 && value != 0)
            {
                return false;
            }

            // Mask has to be continuous inside bytes
            firstZeroInByteHit = false;

            // Count bits
            for (int bitIdx = 7; bitIdx >= 0; bitIdx--)
            {
                if (value & (1 << bitIdx))
                {
                    if (firstZeroInByteHit)
                    {
                        // Continuity not preserved
                        return false;
                    }
                    else
                    {
                        (*bits)++;
                    }
                }
                else
                {
                    firstZeroInByteHit = true;
                }
            }
        }

        previousValue = value;
    }

    return true;
}

/**
 * @brief Changes IPv4 address type property (Address, Gateway)
 *
 * @param[in] ifaceId     Id of interface whose IP should be modified
 * @param[in] ipIdx       Index of IP in input array that should be modified
 * @param[in] ipHash      DBus Hash id of modified IP
 * @param[in] name        Name of field in JSON representation
 * @param[in] newValue    New value that should be written
 * @param[io] asyncResp   Response object that will be returned to client
 *
 * @return true if give IP is valid and has been sent do D-Bus, false
 * otherwise
 */
inline void changeIPv4AddressProperty(
    const std::string &ifaceId, int ipIdx, const std::string &ipHash,
    const std::string &name, const std::string &newValue,
    const std::shared_ptr<AsyncResp> asyncResp)
{
    auto callback =
        [asyncResp, ipIdx, name{std::string(name)},
         newValue{std::move(newValue)}](const boost::system::error_code ec) {
            if (ec)
            {
                messages::internalError(asyncResp->res);
            }
        };

    crow::connections::systemBus->async_method_call(
        std::move(callback), "xyz.openbmc_project.Network",
        "/xyz/openbmc_project/network/" + ifaceId + "/ipv4/" + ipHash,
        "org.freedesktop.DBus.Properties", "Set",
        "xyz.openbmc_project.Network.IP", name,
        std::variant<std::string>(newValue));
}

/**
 * @brief Modifies SubnetMask for given IP
 *
 * @param[in] ifaceId      Id of interface whose IP should be modified
 * @param[in] ipIdx        Index of IP in input array that should be
 * modified
 * @param[in] ipHash       DBus Hash id of modified IP
 * @param[in] newValue     Mask as PrefixLength in bitcount
 * @param[io] asyncResp   Response object that will be returned to client
 *
 * @return None
 */
inline void changeIPv4SubnetMaskProperty(const std::string &ifaceId, int ipIdx,
                                         const std::string &ipHash,
                                         uint8_t &newValue,
                                         std::shared_ptr<AsyncResp> asyncResp)
{
    auto callback = [asyncResp, ipIdx](const boost::system::error_code ec) {
        if (ec)
        {
            messages::internalError(asyncResp->res);
        }
    };

    crow::connections::systemBus->async_method_call(
        std::move(callback), "xyz.openbmc_project.Network",
        "/xyz/openbmc_project/network/" + ifaceId + "/ipv4/" + ipHash,
        "org.freedesktop.DBus.Properties", "Set",
        "xyz.openbmc_project.Network.IP", "PrefixLength",
        std::variant<uint8_t>(newValue));
}

/**
 * @brief Deletes given IPv4
 *
 * @param[in] ifaceId     Id of interface whose IP should be deleted
 * @param[in] ipHash      DBus Hash id of IP that should be deleted
 * @param[io] asyncResp   Response object that will be returned to client
 *
 * @return None
 */
inline void deleteIPv4(const std::string &ifaceId, const std::string &ipHash,
                       const std::shared_ptr<AsyncResp> asyncResp)
{
    crow::connections::systemBus->async_method_call(
        [asyncResp](const boost::system::error_code ec) {
            if (ec)
            {
                messages::internalError(asyncResp->res);
            }
        },
        "xyz.openbmc_project.Network",
        "/xyz/openbmc_project/network/" + ifaceId + "/ipv4/" + ipHash,
        "xyz.openbmc_project.Object.Delete", "Delete");
}

/**
 * @brief Creates IPv4 with given data
 *
 * @param[in] ifaceId     Id of interface whose IP should be deleted
 * @param[in] ipIdx       Index of IP in input array that should be deleted
 * @param[in] ipHash      DBus Hash id of IP that should be deleted
 * @param[io] asyncResp   Response object that will be returned to client
 *
 * @return None
 */
inline void createIPv4(const std::string &ifaceId, unsigned int ipIdx,
                       uint8_t subnetMask, const std::string &gateway,
                       const std::string &address,
                       std::shared_ptr<AsyncResp> asyncResp)
{
    auto createIpHandler = [asyncResp](const boost::system::error_code ec) {
        if (ec)
        {
            messages::internalError(asyncResp->res);
        }
    };

    crow::connections::systemBus->async_method_call(
        std::move(createIpHandler), "xyz.openbmc_project.Network",
        "/xyz/openbmc_project/network/" + ifaceId,
        "xyz.openbmc_project.Network.IP.Create", "IP",
        "xyz.openbmc_project.Network.IP.Protocol.IPv4", address, subnetMask,
        gateway);
}

/**
 * @brief Deletes given IPv6
 *
 * @param[in] ifaceId     Id of interface whose IP should be deleted
 * @param[in] ipHash      DBus Hash id of IP that should be deleted
 * @param[io] asyncResp   Response object that will be returned to client
 *
 * @return None
 */
inline void deleteIPv6(const std::string &ifaceId, const std::string &ipHash,
                       const std::shared_ptr<AsyncResp> asyncResp)
{
    crow::connections::systemBus->async_method_call(
        [asyncResp](const boost::system::error_code ec) {
            if (ec)
            {
                messages::internalError(asyncResp->res);
            }
        },
        "xyz.openbmc_project.Network",
        "/xyz/openbmc_project/network/" + ifaceId + "/ipv6/" + ipHash,
        "xyz.openbmc_project.Object.Delete", "Delete");
}

/**
 * @brief Creates IPv6 with given data
 *
 * @param[in] ifaceId      Id of interface whose IP should be added
 * @param[in] ipIdx        Index of IP in input array that should be added
 * @param[in] prefixLength Prefix length that needs to be added
 * @param[in] address      IP address that needs to be added
 * @param[io] asyncResp    Response object that will be returned to client
 *
 * @return None
 */
inline void createIPv6(const std::string &ifaceId, unsigned int ipIdx,
                       uint8_t prefixLength, const std::string &address,
                       std::shared_ptr<AsyncResp> asyncResp)
{
    auto createIpHandler = [asyncResp](const boost::system::error_code ec) {
        if (ec)
        {
            messages::internalError(asyncResp->res);
        }
    };
    // Passing null for gateway, as per redfish spec IPv6StaticAddresses object
    // does not have assosiated gateway property
    crow::connections::systemBus->async_method_call(
        std::move(createIpHandler), "xyz.openbmc_project.Network",
        "/xyz/openbmc_project/network/" + ifaceId,
        "xyz.openbmc_project.Network.IP.Create", "IP",
        "xyz.openbmc_project.Network.IP.Protocol.IPv6", address, prefixLength,
        "");
}

using GetAllPropertiesType =
    boost::container::flat_map<std::string, sdbusplus::message::variant<bool>>;

inline void getDHCPConfigData(const std::shared_ptr<AsyncResp> asyncResp)
{
    auto getConfig = [asyncResp](const boost::system::error_code error_code,
                                 const GetAllPropertiesType &dbus_data) {
        if (error_code)
        {
            BMCWEB_LOG_ERROR << "D-Bus response error: " << error_code;
            messages::internalError(asyncResp->res);
            return;
        }
        nlohmann::json &DHCPConfigTypeJson = asyncResp->res.jsonValue["DHCPv4"];
        for (const auto &property : dbus_data)
        {
            auto value =
                sdbusplus::message::variant_ns::get_if<bool>(&property.second);

            if (value == nullptr)
            {
                continue;
            }
            if (property.first == "DNSEnabled")
            {
                DHCPConfigTypeJson["UseDNSServers"] = *value;
            }
            else if (property.first == "HostNameEnabled")
            {
                DHCPConfigTypeJson["UseDomainName"] = *value;
            }
            else if (property.first == "NTPEnabled")
            {
                DHCPConfigTypeJson["UseNTPServers"] = *value;
            }
        }
    };
    crow::connections::systemBus->async_method_call(
        std::move(getConfig), "xyz.openbmc_project.Network",
        "/xyz/openbmc_project/network/config/dhcp",
        "org.freedesktop.DBus.Properties", "GetAll",
        "xyz.openbmc_project.Network.DHCPConfiguration");
}

/**
 * Function that retrieves all properties for given Ethernet Interface
 * Object
 * from EntityManager Network Manager
 * @param ethiface_id a eth interface id to query on DBus
 * @param callback a function that shall be called to convert Dbus output
 * into JSON
 */
template <typename CallbackFunc>
void getEthernetIfaceData(const std::string &ethiface_id,
                          CallbackFunc &&callback)
{
    crow::connections::systemBus->async_method_call(
        [ethiface_id{std::string{ethiface_id}}, callback{std::move(callback)}](
            const boost::system::error_code error_code,
            const GetManagedObjects &resp) {
            EthernetInterfaceData ethData{};
            boost::container::flat_set<IPv4AddressData> ipv4Data;
            boost::container::flat_set<IPv6AddressData> ipv6Data;
            boost::container::flat_set<IPv6AddressData> ipv6StaticData;

            if (error_code)
            {
                callback(false, ethData, ipv4Data, ipv6Data, ipv6StaticData);
                return;
            }

            bool found =
                extractEthernetInterfaceData(ethiface_id, resp, ethData);
            if (!found)
            {
                callback(false, ethData, ipv4Data, ipv6Data, ipv6StaticData);
                return;
            }

            extractIPData(ethiface_id, resp, ipv4Data);
            // Fix global GW
            for (IPv4AddressData &ipv4 : ipv4Data)
            {
                if ((ipv4.linktype == LinkType::Global) &&
                    (ipv4.gateway == "0.0.0.0"))
                {
                    ipv4.gateway = ethData.default_gateway;
                }
            }

            extractIPV6Data(ethiface_id, resp, ipv6Data, ipv6StaticData);
            // Finally make a callback with usefull data
            callback(true, ethData, ipv4Data, ipv6Data, ipv6StaticData);
        },
        "xyz.openbmc_project.Network", "/xyz/openbmc_project/network",
        "org.freedesktop.DBus.ObjectManager", "GetManagedObjects");
};

/**
 * Function that retrieves all Ethernet Interfaces available through Network
 * Manager
 * @param callback a function that shall be called to convert Dbus output
 * into JSON.
 */
template <typename CallbackFunc>
void getEthernetIfaceList(CallbackFunc &&callback)
{
    crow::connections::systemBus->async_method_call(
        [callback{std::move(callback)}](
            const boost::system::error_code error_code,
            GetManagedObjects &resp) {
            // Callback requires vector<string> to retrieve all available
            // ethernet interfaces
            boost::container::flat_set<std::string> iface_list;
            iface_list.reserve(resp.size());
            if (error_code)
            {
                callback(false, iface_list);
                return;
            }

            // Iterate over all retrieved ObjectPaths.
            for (const auto &objpath : resp)
            {
                // And all interfaces available for certain ObjectPath.
                for (const auto &interface : objpath.second)
                {
                    // If interface is
                    // xyz.openbmc_project.Network.EthernetInterface, this is
                    // what we're looking for.
                    if (interface.first ==
                        "xyz.openbmc_project.Network.EthernetInterface")
                    {
                        // Cut out everyting until last "/", ...
                        const std::string &iface_id = objpath.first.str;
                        std::size_t last_pos = iface_id.rfind("/");
                        if (last_pos != std::string::npos)
                        {
                            // and put it into output vector.
                            iface_list.emplace(iface_id.substr(last_pos + 1));
                        }
                    }
                }
            }
            // Finally make a callback with useful data
            callback(true, iface_list);
        },
        "xyz.openbmc_project.Network", "/xyz/openbmc_project/network",
        "org.freedesktop.DBus.ObjectManager", "GetManagedObjects");
};

/**
 * EthernetCollection derived class for delivering Ethernet Collection Schema
 */
class EthernetCollection : public Node
{
  public:
    template <typename CrowApp>
    EthernetCollection(CrowApp &app) :
        Node(app, "/redfish/v1/Managers/bmc/EthernetInterfaces/")
    {
        entityPrivileges = {
            {boost::beast::http::verb::get, {{"Login"}}},
            {boost::beast::http::verb::head, {{"Login"}}},
            {boost::beast::http::verb::patch, {{"ConfigureComponents"}}},
            {boost::beast::http::verb::put, {{"ConfigureComponents"}}},
            {boost::beast::http::verb::delete_, {{"ConfigureComponents"}}},
            {boost::beast::http::verb::post, {{"ConfigureComponents"}}}};
    }

  private:
    /**
     * Functions triggers appropriate requests on DBus
     */
    void doGet(crow::Response &res, const crow::Request &req,
               const std::vector<std::string> &params) override
    {
        res.jsonValue["@odata.type"] =
            "#EthernetInterfaceCollection.EthernetInterfaceCollection";
        res.jsonValue["@odata.context"] =
            "/redfish/v1/"
            "$metadata#EthernetInterfaceCollection.EthernetInterfaceCollection";
        res.jsonValue["@odata.id"] =
            "/redfish/v1/Managers/bmc/EthernetInterfaces";
        res.jsonValue["Name"] = "Ethernet Network Interface Collection";
        res.jsonValue["Description"] =
            "Collection of EthernetInterfaces for this Manager";
        std::shared_ptr<AsyncResp> asyncResp = std::make_shared<AsyncResp>(res);
        // Get eth interface list, and call the below callback for JSON
        // preparation
        getEthernetIfaceList(
            [asyncResp](
                const bool &success,
                const boost::container::flat_set<std::string> &iface_list) {
                if (!success)
                {
                    messages::internalError(asyncResp->res);
                    return;
                }

                nlohmann::json &iface_array =
                    asyncResp->res.jsonValue["Members"];
                iface_array = nlohmann::json::array();
                std::string tag = "_";
                for (const std::string &iface_item : iface_list)
                {
                    std::size_t found = iface_item.find(tag);
                    if (found == std::string::npos)
                    {
                        iface_array.push_back(
                            {{"@odata.id",
                              "/redfish/v1/Managers/bmc/EthernetInterfaces/" +
                                  iface_item}});
                    }
                }

                asyncResp->res.jsonValue["Members@odata.count"] =
                    iface_array.size();
                asyncResp->res.jsonValue["@odata.id"] =
                    "/redfish/v1/Managers/bmc/EthernetInterfaces";
            });
    }
};

/**
 * EthernetInterface derived class for delivering Ethernet Schema
 */
class EthernetInterface : public Node
{
  public:
    /*
     * Default Constructor
     */
    template <typename CrowApp>
    EthernetInterface(CrowApp &app) :
        Node(app, "/redfish/v1/Managers/bmc/EthernetInterfaces/<str>/",
             std::string())
    {
        entityPrivileges = {
            {boost::beast::http::verb::get, {{"Login"}}},
            {boost::beast::http::verb::head, {{"Login"}}},
            {boost::beast::http::verb::patch, {{"ConfigureComponents"}}},
            {boost::beast::http::verb::put, {{"ConfigureComponents"}}},
            {boost::beast::http::verb::delete_, {{"ConfigureComponents"}}},
            {boost::beast::http::verb::post, {{"ConfigureComponents"}}}};
    }

  private:
    void handleHostnamePatch(const std::string &hostname,
                             const std::shared_ptr<AsyncResp> asyncResp)
    {
        asyncResp->res.jsonValue["HostName"] = hostname;
        crow::connections::systemBus->async_method_call(
            [asyncResp](const boost::system::error_code ec) {
                if (ec)
                {
                    messages::internalError(asyncResp->res);
                }
            },
            "xyz.openbmc_project.Network",
            "/xyz/openbmc_project/network/config",
            "org.freedesktop.DBus.Properties", "Set",
            "xyz.openbmc_project.Network.SystemConfiguration", "HostName",
            std::variant<std::string>(hostname));
    }

    void handleMACAddressPatch(const std::string &ifaceId,
                               const std::string &macAddress,
                               const std::shared_ptr<AsyncResp> &asyncResp)
    {
        crow::connections::systemBus->async_method_call(
            [asyncResp, macAddress](const boost::system::error_code ec) {
                if (ec)
                {
                    messages::internalError(asyncResp->res);
                    return;
                }
            },
            "xyz.openbmc_project.Network",
            "/xyz/openbmc_project/network/" + ifaceId,
            "org.freedesktop.DBus.Properties", "Set",
            "xyz.openbmc_project.Network.MACAddress", "MACAddress",
            std::variant<std::string>(macAddress));
    }

    void setDHCPEnabled(const std::string &ifaceId,
                        const std::string &propertyName, const bool &value,
                        const std::shared_ptr<AsyncResp> asyncResp)
    {
        crow::connections::systemBus->async_method_call(
            [asyncResp](const boost::system::error_code ec) {
                if (ec)
                {
                    BMCWEB_LOG_ERROR << "D-Bus responses error: " << ec;
                    messages::internalError(asyncResp->res);
                    return;
                }
            },
            "xyz.openbmc_project.Network",
            "/xyz/openbmc_project/network/" + ifaceId,
            "org.freedesktop.DBus.Properties", "Set",
            "xyz.openbmc_project.Network.EthernetInterface", propertyName,
            std::variant<bool>{value});
    }
    void setDHCPv4Config(const std::string &propertyName, const bool &value,
                         const std::shared_ptr<AsyncResp> asyncResp)
    {
        BMCWEB_LOG_DEBUG << propertyName << " = " << value;
        crow::connections::systemBus->async_method_call(
            [asyncResp](const boost::system::error_code ec) {
                if (ec)
                {
                    BMCWEB_LOG_ERROR << "D-Bus responses error: " << ec;
                    messages::internalError(asyncResp->res);
                    return;
                }
            },
            "xyz.openbmc_project.Network",
            "/xyz/openbmc_project/network/config/dhcp",
            "org.freedesktop.DBus.Properties", "Set",
            "xyz.openbmc_project.Network.DHCPConfiguration", propertyName,
            std::variant<bool>{value});
    }

    void handleDHCPv4Patch(const std::string &ifaceId, nlohmann::json &input,
                           const std::shared_ptr<AsyncResp> asyncResp)
    {
        std::optional<bool> dhcpEnabled;
        std::optional<bool> useDNSServers;
        std::optional<bool> useDomainName;
        std::optional<bool> useNTPServers;

        if (!json_util::readJson(input, asyncResp->res, "DHCPEnabled",
                                 dhcpEnabled, "UseDNSServers", useDNSServers,
                                 "UseDomainName", useDomainName,
                                 "UseNTPServers", useNTPServers))
        {
            return;
        }

        if (dhcpEnabled)
        {
            BMCWEB_LOG_DEBUG << "set DHCPEnabled...";
            setDHCPEnabled(ifaceId, "DHCPEnabled", *dhcpEnabled, asyncResp);
        }

        if (useDNSServers)
        {
            BMCWEB_LOG_DEBUG << "set DNSEnabled...";
            setDHCPv4Config("DNSEnabled", *useDNSServers, asyncResp);
        }

        if (useDomainName)
        {
            BMCWEB_LOG_DEBUG << "set HostNameEnabled...";
            setDHCPv4Config("HostNameEnabled", *useDomainName, asyncResp);
        }

        if (useNTPServers)
        {
            BMCWEB_LOG_DEBUG << "set NTPEnabled...";
            setDHCPv4Config("NTPEnabled", *useNTPServers, asyncResp);
        }
    }
    void handleIPv4Patch(
        const std::string &ifaceId, nlohmann::json &input,
        const boost::container::flat_set<IPv4AddressData> &ipv4Data,
        const std::shared_ptr<AsyncResp> asyncResp)
    {
        if (!input.is_array())
        {
            messages::propertyValueTypeError(asyncResp->res, input.dump(),
                                             "IPv4Addresses");
            return;
        }

        int entryIdx = 0;
        boost::container::flat_set<IPv4AddressData>::const_iterator thisData =
            ipv4Data.begin();
        for (nlohmann::json &thisJson : input)
        {
            std::string pathString =
                "IPv4Addresses/" + std::to_string(entryIdx);

            if (thisJson.is_null())
            {
                if (thisData != ipv4Data.end())
                {
                    deleteIPv4(ifaceId, thisData->id, asyncResp);
                    thisData++;
                }
                else
                {
                    messages::propertyValueFormatError(
                        asyncResp->res, input.dump(), pathString);
                    return;
                    // TODO(ratagupt) Not sure about the property where value is
                    // list and if unable to update one of the
                    // list value then should we proceed further or
                    // break there, would ask in the redfish forum
                    // till then we stop processing the next list item.
                }
                entryIdx++;
                continue; // not an error as per the redfish spec.
            }

            if (thisJson.empty())
            {
                if (thisData != ipv4Data.end())
                {
                    thisData++;
                }
                else
                {
                    messages::propertyMissing(asyncResp->res,
                                              pathString + "/Address");
                    return;
                    // TODO(ratagupt) Not sure about the property where value is
                    // list and if unable to update one of the
                    // list value then should we proceed further or
                    // break there, would ask in the redfish forum
                    // till then we stop processing the next list item.
                }
                entryIdx++;
                continue; // not an error as per the redfish spec.
            }

            std::optional<std::string> address;
            std::optional<std::string> subnetMask;
            std::optional<std::string> gateway;

            if (!json_util::readJson(thisJson, asyncResp->res, "Address",
                                     address, "SubnetMask", subnetMask,
                                     "Gateway", gateway))
            {
                return;
            }

            if (address)
            {
                if (!ipv4VerifyIpAndGetBitcount(*address))
                {
                    messages::propertyValueFormatError(asyncResp->res, *address,
                                                       pathString + "/Address");
                    return;
                }
            }

            uint8_t prefixLength = 0;
            if (subnetMask)
            {
                if (!ipv4VerifyIpAndGetBitcount(*subnetMask, &prefixLength))
                {
                    messages::propertyValueFormatError(
                        asyncResp->res, *subnetMask,
                        pathString + "/SubnetMask");
                    return;
                }
            }

            if (gateway)
            {
                if (!ipv4VerifyIpAndGetBitcount(*gateway))
                {
                    messages::propertyValueFormatError(asyncResp->res, *gateway,
                                                       pathString + "/Gateway");
                    return;
                }
            }

            // if IP address exist then  modify it.
            if (thisData != ipv4Data.end())
            {
                // Apply changes
                if (address)
                {
                    auto callback =
                        [asyncResp](const boost::system::error_code ec) {
                            if (ec)
                            {
                                messages::internalError(asyncResp->res);
                                return;
                            }
                        };

                    crow::connections::systemBus->async_method_call(
                        std::move(callback), "xyz.openbmc_project.Network",
                        "/xyz/openbmc_project/network/" + ifaceId + "/ipv4/" +
                            thisData->id,
                        "org.freedesktop.DBus.Properties", "Set",
                        "xyz.openbmc_project.Network.IP", "Address",
                        std::variant<std::string>(*address));
                }

                if (subnetMask)
                {
                    changeIPv4SubnetMaskProperty(ifaceId, entryIdx,
                                                 thisData->id, prefixLength,
                                                 asyncResp);
                }

                if (gateway)
                {
                    auto callback =
                        [asyncResp](const boost::system::error_code ec) {
                            if (ec)
                            {
                                messages::internalError(asyncResp->res);
                                return;
                            }
                        };

                    crow::connections::systemBus->async_method_call(
                        std::move(callback), "xyz.openbmc_project.Network",
                        "/xyz/openbmc_project/network/" + ifaceId + "/ipv4/" +
                            thisData->id,
                        "org.freedesktop.DBus.Properties", "Set",
                        "xyz.openbmc_project.Network.IP", "Gateway",
                        std::variant<std::string>(*gateway));
                }

                thisData++;
            }
            else
            {
                // Create IPv4 with provided data
                if (!gateway)
                {
                    messages::propertyMissing(asyncResp->res,
                                              pathString + "/Gateway");
                    continue;
                }

                if (!address)
                {
                    messages::propertyMissing(asyncResp->res,
                                              pathString + "/Address");
                    continue;
                }

                if (!subnetMask)
                {
                    messages::propertyMissing(asyncResp->res,
                                              pathString + "/SubnetMask");
                    continue;
                }

                createIPv4(ifaceId, entryIdx, prefixLength, *gateway, *address,
                           asyncResp);

                nlohmann::json &ipv4AddressJson =
                    asyncResp->res.jsonValue["IPv4Addresses"][entryIdx];
                ipv4AddressJson["Address"] = *address;
                ipv4AddressJson["SubnetMask"] = *subnetMask;
                ipv4AddressJson["Gateway"] = *gateway;
            }
            entryIdx++;
        }
    }

    void handleStaticNameServersPatch(
        const std::string &ifaceId,
        const std::vector<std::string> &updatedStaticNameServers,
        const std::shared_ptr<AsyncResp> &asyncResp)
    {
        crow::connections::systemBus->async_method_call(
            [asyncResp](const boost::system::error_code ec) {
                if (ec)
                {
                    messages::internalError(asyncResp->res);
                    return;
                }
            },
            "xyz.openbmc_project.Network",
            "/xyz/openbmc_project/network/" + ifaceId,
            "org.freedesktop.DBus.Properties", "Set",
            "xyz.openbmc_project.Network.EthernetInterface", "Nameservers",
            std::variant<std::vector<std::string>>{updatedStaticNameServers});
    }

    void handleIPv6StaticAddressesPatch(
        const std::string &ifaceId, nlohmann::json &input,
        const boost::container::flat_set<IPv6AddressData> &ipv6StaticData,
        const std::shared_ptr<AsyncResp> asyncResp)
    {
        if (!input.is_array())
        {
            messages::propertyValueTypeError(asyncResp->res, input.dump(),
                                             "IPv6StaticAddresses");
            return;
        }

        int entryIdx = 0;
        boost::container::flat_set<IPv6AddressData>::const_iterator thisData =
            ipv6StaticData.begin();
        for (nlohmann::json &thisJson : input)
        {
            std::string pathString =
                "IPv6StaticAddresses/" + std::to_string(entryIdx);

            if (thisJson.is_null())
            {
                if (thisData != ipv6StaticData.end())
                {
                    deleteIPv6(ifaceId, thisData->id, asyncResp);
                    thisData++;
                }
                else
                {
                    messages::propertyValueFormatError(
                        asyncResp->res, input.dump(), pathString);
                    return;
                }
                entryIdx++;
                continue;
            }

            if (thisJson.empty())
            {
                if (thisData != ipv6StaticData.end())
                {
                    thisData++;
                }
                else
                {
                    messages::propertyMissing(asyncResp->res,
                                              pathString + "/Address");
                    return;
                }
                entryIdx++;
                continue;
            }

            std::optional<std::string> address;
            std::optional<uint8_t> prefixLength;

            if (!json_util::readJson(thisJson, asyncResp->res, "Address",
                                     address, "PrefixLength", prefixLength))
            {
                return;
            }

            // if IP address exist then  modify it.
            if (thisData != ipv6StaticData.end())
            {
                // Apply changes
                if (address)
                {
                    auto callback =
                        [asyncResp](const boost::system::error_code ec) {
                            if (ec)
                            {
                                messages::internalError(asyncResp->res);
                                return;
                            }
                        };

                    crow::connections::systemBus->async_method_call(
                        std::move(callback), "xyz.openbmc_project.Network",
                        "/xyz/openbmc_project/network/" + ifaceId + "/ipv6/" +
                            thisData->id,
                        "org.freedesktop.DBus.Properties", "Set",
                        "xyz.openbmc_project.Network.IP", "Address",
                        std::variant<std::string>(*address));
                }

                if (prefixLength)
                {
                    auto callback =
                        [asyncResp](const boost::system::error_code ec) {
                            if (ec)
                            {
                                messages::internalError(asyncResp->res);
                                return;
                            }
                        };

                    crow::connections::systemBus->async_method_call(
                        std::move(callback), "xyz.openbmc_project.Network",
                        "/xyz/openbmc_project/network/" + ifaceId + "/ipv6/" +
                            thisData->id,
                        "org.freedesktop.DBus.Properties", "Set",
                        "xyz.openbmc_project.Network.IP", "PrefixLength",
                        std::variant<uint8_t>(*prefixLength));
                }

                thisData++;
            }
            else
            {
                // Create IPv6 with provided data

                if (!prefixLength)
                {
                    messages::propertyMissing(asyncResp->res,
                                              pathString + "/PrefixLength");
                    continue;
                }

                if (!address)
                {
                    messages::propertyMissing(asyncResp->res,
                                              pathString + "/Address");
                    continue;
                }

                createIPv6(ifaceId, entryIdx, *prefixLength, *address,
                           asyncResp);

                nlohmann::json &ipv6StaticAddressJson =
                    asyncResp->res.jsonValue["IPv6StaticAddresses"][entryIdx];
                ipv6StaticAddressJson["Address"] = *address;
                ipv6StaticAddressJson["PrefixLength"] = *prefixLength;
            }
            entryIdx++;
        }
    }

    void parseInterfaceData(
        nlohmann::json &json_response, const std::string &iface_id,
        const EthernetInterfaceData &ethData,
        const boost::container::flat_set<IPv4AddressData> &ipv4Data,
        const boost::container::flat_set<IPv6AddressData> &ipv6Data,
        const boost::container::flat_set<IPv6AddressData> &ipv6StaticData)
    {
        json_response["Id"] = iface_id;
        json_response["@odata.id"] =
            "/redfish/v1/Managers/bmc/EthernetInterfaces/" + iface_id;
        json_response["InterfaceEnabled"] = true;
        if (ethData.speed == 0)
        {
            json_response["LinkStatus"] = "NoLink";
            json_response["Status"] = {
                {"Health", "OK"},
                {"State", "Disabled"},
            };
        }
        else
        {
            json_response["LinkStatus"] = "LinkUp";
            json_response["Status"] = {
                {"Health", "OK"},
                {"State", "Enabled"},
            };
        }
        json_response["SpeedMbps"] = ethData.speed;
        json_response["MACAddress"] = ethData.mac_address;
        json_response["DHCPv4"]["DHCPEnabled"] = ethData.DHCPEnabled;

        if (!ethData.hostname.empty())
        {
            json_response["HostName"] = ethData.hostname;
        }

        json_response["VLANs"] = {
            {"@odata.id", "/redfish/v1/Managers/bmc/EthernetInterfaces/" +
                              iface_id + "/VLANs"}};

        json_response["NameServers"] = ethData.nameservers;
        json_response["StaticNameServers"] = ethData.nameservers;

        if (ipv4Data.size() > 0)
        {
            nlohmann::json &ipv4_array = json_response["IPv4Addresses"];
            ipv4_array = nlohmann::json::array();
            for (auto &ipv4_config : ipv4Data)
            {

                std::string gatewayStr = ipv4_config.gateway;
                if (gatewayStr.empty())
                {
                    gatewayStr = "0.0.0.0";
                }

                ipv4_array.push_back({{"AddressOrigin", ipv4_config.origin},
                                      {"SubnetMask", ipv4_config.netmask},
                                      {"Address", ipv4_config.address},
                                      {"Gateway", gatewayStr}});
            }
        }
        json_response["IPv6DefaultGateway"] = ethData.ipv6_default_gateway;

        nlohmann::json &ipv6_array = json_response["IPv6Addresses"];
        ipv6_array = nlohmann::json::array();
        for (auto &ipv6_config : ipv6Data)
        {
            ipv6_array.push_back({{"Address", ipv6_config.address},
                                  {"PrefixLength", ipv6_config.prefixLength},
                                  {"AddressOrigin", ipv6_config.origin}});
        }

        nlohmann::json &ipv6_static_array =
            json_response["IPv6StaticAddresses"];
        ipv6_static_array = nlohmann::json::array();
        for (auto &ipv6_static_config : ipv6StaticData)
        {
            ipv6_static_array.push_back(
                {{"Address", ipv6_static_config.address},
                 {"PrefixLength", ipv6_static_config.prefixLength}});
        }
    }

    /**
     * Functions triggers appropriate requests on DBus
     */
    void doGet(crow::Response &res, const crow::Request &req,
               const std::vector<std::string> &params) override
    {
        std::shared_ptr<AsyncResp> asyncResp = std::make_shared<AsyncResp>(res);
        if (params.size() != 1)
        {
            messages::internalError(asyncResp->res);
            return;
        }

        getEthernetIfaceData(
            params[0],
            [this, asyncResp, iface_id{std::string(params[0])}](
                const bool &success, const EthernetInterfaceData &ethData,
                const boost::container::flat_set<IPv4AddressData> &ipv4Data,
                const boost::container::flat_set<IPv6AddressData> &ipv6Data,
                const boost::container::flat_set<IPv6AddressData>
                    &ipv6StaticData) {
                if (!success)
                {
                    // TODO(Pawel)consider distinguish between non existing
                    // object, and other errors
                    messages::resourceNotFound(asyncResp->res,
                                               "EthernetInterface", iface_id);
                    return;
                }

                // because this has no dependence on the interface at this
                // point, it needs to be done after we know the interface
                // exists, not before.
                getDHCPConfigData(asyncResp);

                asyncResp->res.jsonValue["@odata.type"] =
                    "#EthernetInterface.v1_4_1.EthernetInterface";
                asyncResp->res.jsonValue["@odata.context"] =
                    "/redfish/v1/$metadata#EthernetInterface.EthernetInterface";
                asyncResp->res.jsonValue["Name"] = "Manager Ethernet Interface";
                asyncResp->res.jsonValue["Description"] =
                    "Management Network Interface";

                parseInterfaceData(asyncResp->res.jsonValue, iface_id, ethData,
                                   ipv4Data, ipv6Data, ipv6StaticData);
            });
    }

    void doPatch(crow::Response &res, const crow::Request &req,
                 const std::vector<std::string> &params) override
    {
        std::shared_ptr<AsyncResp> asyncResp = std::make_shared<AsyncResp>(res);
        if (params.size() != 1)
        {
            messages::internalError(asyncResp->res);
            return;
        }

        const std::string &iface_id = params[0];

        std::optional<std::string> hostname;
        std::optional<std::string> macAddress;
        std::optional<std::string> ipv6DefaultGateway;
        std::optional<nlohmann::json> ipv4Addresses;
        std::optional<nlohmann::json> ipv6Addresses;
        std::optional<nlohmann::json> ipv6StaticAddresses;
        std::optional<std::vector<std::string>> staticNameServers;
        std::optional<std::vector<std::string>> nameServers;
        std::optional<nlohmann::json> dhcpv4;

        if (!json_util::readJson(
                req, res, "HostName", hostname, "IPv4Addresses", ipv4Addresses,
                "MACAddress", macAddress, "StaticNameServers",
                staticNameServers, "IPv6DefaultGateway", ipv6DefaultGateway,
                "IPv6StaticAddresses", ipv6StaticAddresses, "NameServers",
                nameServers, "DHCPv4", dhcpv4))
        {
            return;
        }

        if (dhcpv4)
        {
            handleDHCPv4Patch(iface_id, *dhcpv4, asyncResp);
        }

        // Get single eth interface data, and call the below callback for JSON
        // preparation
        getEthernetIfaceData(
            iface_id,
            [this, asyncResp, iface_id, hostname = std::move(hostname),
             macAddress = std::move(macAddress),
             ipv4Addresses = std::move(ipv4Addresses),
             ipv6DefaultGateway = std::move(ipv6DefaultGateway),
             ipv6StaticAddresses = std::move(ipv6StaticAddresses),
             staticNameServers = std::move(staticNameServers),
             nameServers = std::move(nameServers)](
                const bool &success, const EthernetInterfaceData &ethData,
                const boost::container::flat_set<IPv4AddressData> &ipv4Data,
                const boost::container::flat_set<IPv6AddressData> &ipv6Data,
                const boost::container::flat_set<IPv6AddressData>
                    &ipv6StaticData) {
                if (!success)
                {
                    // ... otherwise return error
                    // TODO(Pawel)consider distinguish between non existing
                    // object, and other errors
                    messages::resourceNotFound(asyncResp->res,
                                               "Ethernet Interface", iface_id);
                    return;
                }

                if (hostname)
                {
                    handleHostnamePatch(*hostname, asyncResp);
                }

                if (macAddress)
                {
                    handleMACAddressPatch(iface_id, *macAddress, asyncResp);
                }

                if (ipv4Addresses)
                {
                    // TODO(ed) for some reason the capture of ipv4Addresses
                    // above is returning a const value, not a non-const value.
                    // This doesn't really work for us, as we need to be able to
                    // efficiently move out the intermedia nlohmann::json
                    // objects. This makes a copy of the structure, and operates
                    // on that, but could be done more efficiently
                    nlohmann::json ipv4 = std::move(*ipv4Addresses);
                    handleIPv4Patch(iface_id, ipv4, ipv4Data, asyncResp);
                }

                if (nameServers)
                {
                    // Data.Permissions is read-only
                    messages::propertyNotWritable(asyncResp->res,
                                                  "NameServers");
                }

                if (staticNameServers)
                {
                    handleStaticNameServersPatch(iface_id, *staticNameServers,
                                                 asyncResp);
                }

                if (ipv6DefaultGateway)
                {
                    messages::propertyNotWritable(asyncResp->res,
                                                  "IPv6DefaultGateway");
                }

                if (ipv6StaticAddresses)
                {
                    nlohmann::json ipv6Static = std::move(*ipv6StaticAddresses);
                    handleIPv6StaticAddressesPatch(iface_id, ipv6Static,
                                                   ipv6StaticData, asyncResp);
                }
            });
    }
};

/**
 * VlanNetworkInterface derived class for delivering VLANNetworkInterface
 * Schema
 */
class VlanNetworkInterface : public Node
{
  public:
    /*
     * Default Constructor
     */
    template <typename CrowApp>
    VlanNetworkInterface(CrowApp &app) :
        Node(app,
             "/redfish/v1/Managers/bmc/EthernetInterfaces/<str>/VLANs/<str>",
             std::string(), std::string())
    {
        entityPrivileges = {
            {boost::beast::http::verb::get, {{"Login"}}},
            {boost::beast::http::verb::head, {{"Login"}}},
            {boost::beast::http::verb::patch, {{"ConfigureComponents"}}},
            {boost::beast::http::verb::put, {{"ConfigureComponents"}}},
            {boost::beast::http::verb::delete_, {{"ConfigureComponents"}}},
            {boost::beast::http::verb::post, {{"ConfigureComponents"}}}};
    }

  private:
    void parseInterfaceData(
        nlohmann::json &json_response, const std::string &parent_iface_id,
        const std::string &iface_id, const EthernetInterfaceData &ethData,
        const boost::container::flat_set<IPv4AddressData> &ipv4Data,
        const boost::container::flat_set<IPv6AddressData> &ipv6Data,
        const boost::container::flat_set<IPv6AddressData> &ipv6StaticData)
    {
        // Fill out obvious data...
        json_response["Id"] = iface_id;
        json_response["@odata.id"] =
            "/redfish/v1/Managers/bmc/EthernetInterfaces/" + parent_iface_id +
            "/VLANs/" + iface_id;

        json_response["VLANEnable"] = true;
        if (!ethData.vlan_id.empty())
        {
            json_response["VLANId"] = ethData.vlan_id.back();
        }
    }

    bool verifyNames(const std::string &parent, const std::string &iface)
    {
        if (!boost::starts_with(iface, parent + "_"))
        {
            return false;
        }
        else
        {
            return true;
        }
    }

    /**
     * Functions triggers appropriate requests on DBus
     */
    void doGet(crow::Response &res, const crow::Request &req,
               const std::vector<std::string> &params) override
    {
        std::shared_ptr<AsyncResp> asyncResp = std::make_shared<AsyncResp>(res);
        // TODO(Pawel) this shall be parameterized call (two params) to get
        // EthernetInterfaces for any Manager, not only hardcoded 'openbmc'.
        // Check if there is required param, truly entering this shall be
        // impossible.
        if (params.size() != 2)
        {
            messages::internalError(res);
            res.end();
            return;
        }

        const std::string &parent_iface_id = params[0];
        const std::string &iface_id = params[1];
        res.jsonValue["@odata.type"] =
            "#VLanNetworkInterface.v1_1_0.VLanNetworkInterface";
        res.jsonValue["@odata.context"] =
            "/redfish/v1/$metadata#VLanNetworkInterface.VLanNetworkInterface";
        res.jsonValue["Name"] = "VLAN Network Interface";

        if (!verifyNames(parent_iface_id, iface_id))
        {
            return;
        }

        // Get single eth interface data, and call the below callback for JSON
        // preparation
        getEthernetIfaceData(
            params[1],
            [this, asyncResp, parent_iface_id{std::string(params[0])},
             iface_id{std::string(params[1])}](
                const bool &success, const EthernetInterfaceData &ethData,
                const boost::container::flat_set<IPv4AddressData> &ipv4Data,
                const boost::container::flat_set<IPv6AddressData> &ipv6Data,
                const boost::container::flat_set<IPv6AddressData>
                    &ipv6StaticData) {
                if (success && ethData.vlan_id.size() != 0)
                {
                    parseInterfaceData(asyncResp->res.jsonValue,
                                       parent_iface_id, iface_id, ethData,
                                       ipv4Data, ipv6Data, ipv6StaticData);
                }
                else
                {
                    // ... otherwise return error
                    // TODO(Pawel)consider distinguish between non existing
                    // object, and other errors
                    messages::resourceNotFound(
                        asyncResp->res, "VLAN Network Interface", iface_id);
                }
            });
    }

    void doPatch(crow::Response &res, const crow::Request &req,
                 const std::vector<std::string> &params) override
    {
        std::shared_ptr<AsyncResp> asyncResp = std::make_shared<AsyncResp>(res);
        if (params.size() != 2)
        {
            messages::internalError(asyncResp->res);
            return;
        }

        const std::string &parentIfaceId = params[0];
        const std::string &ifaceId = params[1];

        if (!verifyNames(parentIfaceId, ifaceId))
        {
            messages::resourceNotFound(asyncResp->res, "VLAN Network Interface",
                                       ifaceId);
            return;
        }

        bool vlanEnable = false;
        uint64_t vlanId = 0;

        if (!json_util::readJson(req, res, "VLANEnable", vlanEnable, "VLANId",
                                 vlanId))
        {
            return;
        }

        // Get single eth interface data, and call the below callback for JSON
        // preparation
        getEthernetIfaceData(
            params[1],
            [this, asyncResp, parentIfaceId{std::string(params[0])},
             ifaceId{std::string(params[1])}, &vlanEnable, &vlanId](
                const bool &success, const EthernetInterfaceData &ethData,
                const boost::container::flat_set<IPv4AddressData> &ipv4Data,
                const boost::container::flat_set<IPv6AddressData> &ipv6Data,
                const boost::container::flat_set<IPv6AddressData>
                    &ipv6StaticData) {
                if (success && !ethData.vlan_id.empty())
                {
                    auto callback =
                        [asyncResp](const boost::system::error_code ec) {
                            if (ec)
                            {
                                messages::internalError(asyncResp->res);
                            }
                        };

                    if (vlanEnable == true)
                    {
                        crow::connections::systemBus->async_method_call(
                            std::move(callback), "xyz.openbmc_project.Network",
                            "/xyz/openbmc_project/network/" + ifaceId,
                            "org.freedesktop.DBus.Properties", "Set",
                            "xyz.openbmc_project.Network.VLAN", "Id",
                            std::variant<uint32_t>(vlanId));
                    }
                    else
                    {
                        BMCWEB_LOG_DEBUG << "vlanEnable is false. Deleting the "
                                            "vlan interface";
                        crow::connections::systemBus->async_method_call(
                            std::move(callback), "xyz.openbmc_project.Network",
                            std::string("/xyz/openbmc_project/network/") +
                                ifaceId,
                            "xyz.openbmc_project.Object.Delete", "Delete");
                    }
                }
                else
                {
                    // TODO(Pawel)consider distinguish between non existing
                    // object, and other errors
                    messages::resourceNotFound(
                        asyncResp->res, "VLAN Network Interface", ifaceId);
                    return;
                }
            });
    }

    void doDelete(crow::Response &res, const crow::Request &req,
                  const std::vector<std::string> &params) override
    {
        std::shared_ptr<AsyncResp> asyncResp = std::make_shared<AsyncResp>(res);
        if (params.size() != 2)
        {
            messages::internalError(asyncResp->res);
            return;
        }

        const std::string &parentIfaceId = params[0];
        const std::string &ifaceId = params[1];

        if (!verifyNames(parentIfaceId, ifaceId))
        {
            messages::resourceNotFound(asyncResp->res, "VLAN Network Interface",
                                       ifaceId);
            return;
        }

        // Get single eth interface data, and call the below callback for JSON
        // preparation
        getEthernetIfaceData(
            params[1],
            [this, asyncResp, parentIfaceId{std::string(params[0])},
             ifaceId{std::string(params[1])}](
                const bool &success, const EthernetInterfaceData &ethData,
                const boost::container::flat_set<IPv4AddressData> &ipv4Data,
                const boost::container::flat_set<IPv6AddressData> &ipv6Data,
                const boost::container::flat_set<IPv6AddressData>
                    &ipv6StaticData) {
                if (success && !ethData.vlan_id.empty())
                {
                    auto callback =
                        [asyncResp](const boost::system::error_code ec) {
                            if (ec)
                            {
                                messages::internalError(asyncResp->res);
                            }
                        };
                    crow::connections::systemBus->async_method_call(
                        std::move(callback), "xyz.openbmc_project.Network",
                        std::string("/xyz/openbmc_project/network/") + ifaceId,
                        "xyz.openbmc_project.Object.Delete", "Delete");
                }
                else
                {
                    // ... otherwise return error
                    // TODO(Pawel)consider distinguish between non existing
                    // object, and other errors
                    messages::resourceNotFound(
                        asyncResp->res, "VLAN Network Interface", ifaceId);
                }
            });
    }
};

/**
 * VlanNetworkInterfaceCollection derived class for delivering
 * VLANNetworkInterface Collection Schema
 */
class VlanNetworkInterfaceCollection : public Node
{
  public:
    template <typename CrowApp>
    VlanNetworkInterfaceCollection(CrowApp &app) :
        Node(app, "/redfish/v1/Managers/bmc/EthernetInterfaces/<str>/VLANs/",
             std::string())
    {
        entityPrivileges = {
            {boost::beast::http::verb::get, {{"Login"}}},
            {boost::beast::http::verb::head, {{"Login"}}},
            {boost::beast::http::verb::patch, {{"ConfigureComponents"}}},
            {boost::beast::http::verb::put, {{"ConfigureComponents"}}},
            {boost::beast::http::verb::delete_, {{"ConfigureComponents"}}},
            {boost::beast::http::verb::post, {{"ConfigureComponents"}}}};
    }

  private:
    /**
     * Functions triggers appropriate requests on DBus
     */
    void doGet(crow::Response &res, const crow::Request &req,
               const std::vector<std::string> &params) override
    {
        std::shared_ptr<AsyncResp> asyncResp = std::make_shared<AsyncResp>(res);
        if (params.size() != 1)
        {
            // This means there is a problem with the router
            messages::internalError(asyncResp->res);
            return;
        }

        const std::string &rootInterfaceName = params[0];

        // Get eth interface list, and call the below callback for JSON
        // preparation
        getEthernetIfaceList(
            [asyncResp, rootInterfaceName{std::string(rootInterfaceName)}](
                const bool &success,
                const boost::container::flat_set<std::string> &iface_list) {
                if (!success)
                {
                    messages::internalError(asyncResp->res);
                    return;
                }

                if (iface_list.find(rootInterfaceName) == iface_list.end())
                {
                    messages::resourceNotFound(asyncResp->res,
                                               "VLanNetworkInterfaceCollection",
                                               rootInterfaceName);
                    return;
                }

                asyncResp->res.jsonValue["@odata.type"] =
                    "#VLanNetworkInterfaceCollection."
                    "VLanNetworkInterfaceCollection";
                asyncResp->res.jsonValue["@odata.context"] =
                    "/redfish/v1/$metadata"
                    "#VLanNetworkInterfaceCollection."
                    "VLanNetworkInterfaceCollection";
                asyncResp->res.jsonValue["Name"] =
                    "VLAN Network Interface Collection";

                nlohmann::json iface_array = nlohmann::json::array();

                for (const std::string &iface_item : iface_list)
                {
                    if (boost::starts_with(iface_item, rootInterfaceName + "_"))
                    {
                        iface_array.push_back(
                            {{"@odata.id",
                              "/redfish/v1/Managers/bmc/EthernetInterfaces/" +
                                  rootInterfaceName + "/VLANs/" + iface_item}});
                    }
                }

                asyncResp->res.jsonValue["Members@odata.count"] =
                    iface_array.size();
                asyncResp->res.jsonValue["Members"] = std::move(iface_array);
                asyncResp->res.jsonValue["@odata.id"] =
                    "/redfish/v1/Managers/bmc/EthernetInterfaces/" +
                    rootInterfaceName + "/VLANs";
            });
    }

    void doPost(crow::Response &res, const crow::Request &req,
                const std::vector<std::string> &params) override
    {
        std::shared_ptr<AsyncResp> asyncResp = std::make_shared<AsyncResp>(res);
        if (params.size() != 1)
        {
            messages::internalError(asyncResp->res);
            return;
        }
        bool vlanEnable = false;
        uint32_t vlanId = 0;
        if (!json_util::readJson(req, res, "VLANId", vlanId, "VLANEnable",
                                 vlanEnable))
        {
            return;
        }
        // Need both vlanId and vlanEnable to service this request
        if (!vlanId)
        {
            messages::propertyMissing(asyncResp->res, "VLANId");
        }
        if (!vlanEnable)
        {
            messages::propertyMissing(asyncResp->res, "VLANEnable");
        }
        if (static_cast<bool>(vlanId) ^ static_cast<bool>(vlanEnable))
        {
            return;
        }

        const std::string &rootInterfaceName = params[0];
        auto callback = [asyncResp](const boost::system::error_code ec) {
            if (ec)
            {
                // TODO(ed) make more consistent error messages based on
                // phosphor-network responses
                messages::internalError(asyncResp->res);
                return;
            }
            messages::created(asyncResp->res);
        };
        crow::connections::systemBus->async_method_call(
            std::move(callback), "xyz.openbmc_project.Network",
            "/xyz/openbmc_project/network",
            "xyz.openbmc_project.Network.VLAN.Create", "VLAN",
            rootInterfaceName, vlanId);
    }
};
} // namespace redfish