xref: /openbmc/bmcweb/features/redfish/lib/ethernet.hpp (revision 11ba39793c016e8476e44be880fb267e059dd4eb)

/*
// 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 <app.hpp>
#include <boost/algorithm/string/classification.hpp>
#include <boost/algorithm/string/split.hpp>
#include <boost/container/flat_set.hpp>
#include <dbus_singleton.hpp>
#include <dbus_utility.hpp>
#include <error_messages.hpp>
#include <query.hpp>
#include <registries/privilege_registry.hpp>
#include <utils/json_utils.hpp>

#include <optional>
#include <regex>

namespace redfish
{

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 isActive;

    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;
    size_t mtuSize;
    bool autoNeg;
    bool dnsEnabled;
    bool ntpEnabled;
    bool hostNameEnabled;
    bool linkUp;
    bool nicEnabled;
    std::string dhcpEnabled;
    std::string operatingMode;
    std::string hostName;
    std::string defaultGateway;
    std::string ipv6DefaultGateway;
    std::string macAddress;
    std::optional<uint32_t> vlanId;
    std::vector<std::string> nameServers;
    std::vector<std::string> staticNameServers;
    std::vector<std::string> domainnames;
};

struct DHCPParameters
{
    std::optional<bool> dhcpv4Enabled;
    std::optional<bool> useDnsServers;
    std::optional<bool> useNtpServers;
    std::optional<bool> useDomainName;
    std::optional<std::string> dhcpv6OperatingMode;
};

// 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 bool translateDhcpEnabledToBool(const std::string& inputDHCP,
                                       bool isIPv4)
{
    if (isIPv4)
    {
        return (
            (inputDHCP ==
             "xyz.openbmc_project.Network.EthernetInterface.DHCPConf.v4") ||
            (inputDHCP ==
             "xyz.openbmc_project.Network.EthernetInterface.DHCPConf.both"));
    }
    return ((inputDHCP ==
             "xyz.openbmc_project.Network.EthernetInterface.DHCPConf.v6") ||
            (inputDHCP ==
             "xyz.openbmc_project.Network.EthernetInterface.DHCPConf.both"));
}

inline std::string getDhcpEnabledEnumeration(bool isIPv4, bool isIPv6)
{
    if (isIPv4 && isIPv6)
    {
        return "xyz.openbmc_project.Network.EthernetInterface.DHCPConf.both";
    }
    if (isIPv4)
    {
        return "xyz.openbmc_project.Network.EthernetInterface.DHCPConf.v4";
    }
    if (isIPv6)
    {
        return "xyz.openbmc_project.Network.EthernetInterface.DHCPConf.v6";
    }
    return "xyz.openbmc_project.Network.EthernetInterface.DHCPConf.none";
}

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";
        }
        return "LinkLocal";
    }
    if (inputOrigin == "xyz.openbmc_project.Network.IP.AddressOrigin.DHCP")
    {
        if (isIPv4)
        {
            return "DHCP";
        }
        return "DHCPv6";
    }
    if (inputOrigin == "xyz.openbmc_project.Network.IP.AddressOrigin.SLAAC")
    {
        return "SLAAC";
    }
    return "";
}

inline bool extractEthernetInterfaceData(
    const std::string& ethifaceId,
    const dbus::utility::ManagedObjectType& dbusData,
    EthernetInterfaceData& ethData)
{
    bool idFound = false;
    for (const auto& objpath : dbusData)
    {
        for (const auto& ifacePair : objpath.second)
        {
            if (objpath.first == "/xyz/openbmc_project/network/" + ethifaceId)
            {
                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.macAddress = *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.vlanId = *id;
                            }
                        }
                    }
                }
                else if (ifacePair.first ==
                         "xyz.openbmc_project.Network.EthernetInterface")
                {
                    for (const auto& propertyPair : ifacePair.second)
                    {
                        if (propertyPair.first == "AutoNeg")
                        {
                            const bool* autoNeg =
                                std::get_if<bool>(&propertyPair.second);
                            if (autoNeg != nullptr)
                            {
                                ethData.autoNeg = *autoNeg;
                            }
                        }
                        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 == "MTU")
                        {
                            const uint32_t* mtuSize =
                                std::get_if<uint32_t>(&propertyPair.second);
                            if (mtuSize != nullptr)
                            {
                                ethData.mtuSize = *mtuSize;
                            }
                        }
                        else if (propertyPair.first == "LinkUp")
                        {
                            const bool* linkUp =
                                std::get_if<bool>(&propertyPair.second);
                            if (linkUp != nullptr)
                            {
                                ethData.linkUp = *linkUp;
                            }
                        }
                        else if (propertyPair.first == "NICEnabled")
                        {
                            const bool* nicEnabled =
                                std::get_if<bool>(&propertyPair.second);
                            if (nicEnabled != nullptr)
                            {
                                ethData.nicEnabled = *nicEnabled;
                            }
                        }
                        else if (propertyPair.first == "Nameservers")
                        {
                            const std::vector<std::string>* nameservers =
                                std::get_if<std::vector<std::string>>(
                                    &propertyPair.second);
                            if (nameservers != nullptr)
                            {
                                ethData.nameServers = *nameservers;
                            }
                        }
                        else if (propertyPair.first == "StaticNameServers")
                        {
                            const std::vector<std::string>* staticNameServers =
                                std::get_if<std::vector<std::string>>(
                                    &propertyPair.second);
                            if (staticNameServers != nullptr)
                            {
                                ethData.staticNameServers = *staticNameServers;
                            }
                        }
                        else if (propertyPair.first == "DHCPEnabled")
                        {
                            const std::string* dhcpEnabled =
                                std::get_if<std::string>(&propertyPair.second);
                            if (dhcpEnabled != nullptr)
                            {
                                ethData.dhcpEnabled = *dhcpEnabled;
                            }
                        }
                        else if (propertyPair.first == "DomainName")
                        {
                            const std::vector<std::string>* domainNames =
                                std::get_if<std::vector<std::string>>(
                                    &propertyPair.second);
                            if (domainNames != nullptr)
                            {
                                ethData.domainnames = *domainNames;
                            }
                        }
                        else if (propertyPair.first == "DefaultGateway")
                        {
                            const std::string* defaultGateway =
                                std::get_if<std::string>(&propertyPair.second);
                            if (defaultGateway != nullptr)
                            {
                                std::string defaultGatewayStr = *defaultGateway;
                                if (defaultGatewayStr.empty())
                                {
                                    ethData.defaultGateway = "0.0.0.0";
                                }
                                else
                                {
                                    ethData.defaultGateway = defaultGatewayStr;
                                }
                            }
                        }
                        else if (propertyPair.first == "DefaultGateway6")
                        {
                            const std::string* defaultGateway6 =
                                std::get_if<std::string>(&propertyPair.second);
                            if (defaultGateway6 != nullptr)
                            {
                                std::string defaultGateway6Str =
                                    *defaultGateway6;
                                if (defaultGateway6Str.empty())
                                {
                                    ethData.ipv6DefaultGateway =
                                        "0:0:0:0:0:0:0:0";
                                }
                                else
                                {
                                    ethData.ipv6DefaultGateway =
                                        defaultGateway6Str;
                                }
                            }
                        }
                    }
                }
            }

            if (objpath.first == "/xyz/openbmc_project/network/config/dhcp")
            {
                if (ifacePair.first ==
                    "xyz.openbmc_project.Network.DHCPConfiguration")
                {
                    for (const auto& propertyPair : ifacePair.second)
                    {
                        if (propertyPair.first == "DNSEnabled")
                        {
                            const bool* dnsEnabled =
                                std::get_if<bool>(&propertyPair.second);
                            if (dnsEnabled != nullptr)
                            {
                                ethData.dnsEnabled = *dnsEnabled;
                            }
                        }
                        else if (propertyPair.first == "NTPEnabled")
                        {
                            const bool* ntpEnabled =
                                std::get_if<bool>(&propertyPair.second);
                            if (ntpEnabled != nullptr)
                            {
                                ethData.ntpEnabled = *ntpEnabled;
                            }
                        }
                        else if (propertyPair.first == "HostNameEnabled")
                        {
                            const bool* hostNameEnabled =
                                std::get_if<bool>(&propertyPair.second);
                            if (hostNameEnabled != nullptr)
                            {
                                ethData.hostNameEnabled = *hostNameEnabled;
                            }
                        }
                    }
                }
            }
            // 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 =
                            std::get_if<std::string>(&propertyPair.second);
                        if (hostname != nullptr)
                        {
                            ethData.hostName = *hostname;
                        }
                    }
                }
            }
        }
    }
    return idFound;
}

// Helper function that extracts data for single ethernet ipv6 address
inline void
    extractIPV6Data(const std::string& ethifaceId,
                    const dbus::utility::ManagedObjectType& dbusData,
                    boost::container::flat_set<IPv6AddressData>& ipv6Config)
{
    const std::string ipv6PathStart =
        "/xyz/openbmc_project/network/" + ethifaceId + "/ipv6/";

    // Since there might be several IPv6 configurations aligned with
    // single ethernet interface, loop over all of them
    for (const auto& objpath : dbusData)
    {
        // Check if proper pattern for object path appears
        if (objpath.first.str.starts_with(ipv6PathStart))
        {
            for (const 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 = ipv6Config.insert(IPv6AddressData{});
                    IPv6AddressData& ipv6Address = *it.first;
                    ipv6Address.id =
                        objpath.first.str.substr(ipv6PathStart.size());
                    for (const auto& property : interface.second)
                    {
                        if (property.first == "Address")
                        {
                            const std::string* address =
                                std::get_if<std::string>(&property.second);
                            if (address != nullptr)
                            {
                                ipv6Address.address = *address;
                            }
                        }
                        else if (property.first == "Origin")
                        {
                            const std::string* origin =
                                std::get_if<std::string>(&property.second);
                            if (origin != nullptr)
                            {
                                ipv6Address.origin =
                                    translateAddressOriginDbusToRedfish(*origin,
                                                                        false);
                            }
                        }
                        else if (property.first == "PrefixLength")
                        {
                            const uint8_t* prefix =
                                std::get_if<uint8_t>(&property.second);
                            if (prefix != nullptr)
                            {
                                ipv6Address.prefixLength = *prefix;
                            }
                        }
                        else if (property.first == "Type" ||
                                 property.first == "Gateway")
                        {
                            // Type & Gateway is not used
                        }
                        else
                        {
                            BMCWEB_LOG_ERROR
                                << "Got extra property: " << property.first
                                << " on the " << objpath.first.str << " object";
                        }
                    }
                }
            }
        }
    }
}

// Helper function that extracts data for single ethernet ipv4 address
inline void
    extractIPData(const std::string& ethifaceId,
                  const dbus::utility::ManagedObjectType& dbusData,
                  boost::container::flat_set<IPv4AddressData>& ipv4Config)
{
    const std::string ipv4PathStart =
        "/xyz/openbmc_project/network/" + ethifaceId + "/ipv4/";

    // Since there might be several IPv4 configurations aligned with
    // single ethernet interface, loop over all of them
    for (const auto& objpath : dbusData)
    {
        // Check if proper pattern for object path appears
        if (objpath.first.str.starts_with(ipv4PathStart))
        {
            for (const 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 = ipv4Config.insert(IPv4AddressData{});
                    IPv4AddressData& ipv4Address = *it.first;
                    ipv4Address.id =
                        objpath.first.str.substr(ipv4PathStart.size());
                    for (const auto& property : interface.second)
                    {
                        if (property.first == "Address")
                        {
                            const std::string* address =
                                std::get_if<std::string>(&property.second);
                            if (address != nullptr)
                            {
                                ipv4Address.address = *address;
                            }
                        }
                        else if (property.first == "Origin")
                        {
                            const std::string* origin =
                                std::get_if<std::string>(&property.second);
                            if (origin != nullptr)
                            {
                                ipv4Address.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
                                ipv4Address.netmask = getNetmask(*mask);
                            }
                        }
                        else if (property.first == "Type" ||
                                 property.first == "Gateway")
                        {
                            // Type & Gateway is not used
                        }
                        else
                        {
                            BMCWEB_LOG_ERROR
                                << "Got extra property: " << property.first
                                << " on the " << objpath.first.str << " object";
                        }
                    }
                    // Check if given address is local, or global
                    ipv4Address.linktype =
                        ipv4Address.address.starts_with("169.254.")
                            ? LinkType::Local
                            : LinkType::Global;
                }
            }
        }
    }
}

/**
 * @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 = nullptr;
    long previousValue = 255;
    bool firstZeroInByteHit = false;
    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 (long bitIdx = 7; bitIdx >= 0; bitIdx--)
            {
                if ((value & (1L << bitIdx)) != 0)
                {
                    if (firstZeroInByteHit)
                    {
                        // Continuity not preserved
                        return false;
                    }
                    (*bits)++;
                }
                else
                {
                    firstZeroInByteHit = true;
                }
            }
        }

        previousValue = value;
    }

    return true;
}

/**
 * @brief Deletes given IPv4 interface
 *
 * @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<bmcweb::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");
}

inline void updateIPv4DefaultGateway(
    const std::string& ifaceId, const std::string& gateway,
    const std::shared_ptr<bmcweb::AsyncResp>& asyncResp)
{
    crow::connections::systemBus->async_method_call(
        [asyncResp](const boost::system::error_code ec) {
        if (ec)
        {
            messages::internalError(asyncResp->res);
            return;
        }
        asyncResp->res.result(boost::beast::http::status::no_content);
        },
        "xyz.openbmc_project.Network",
        "/xyz/openbmc_project/network/" + ifaceId,
        "org.freedesktop.DBus.Properties", "Set",
        "xyz.openbmc_project.Network.EthernetInterface", "DefaultGateway",
        dbus::utility::DbusVariantType(gateway));
}
/**
 * @brief Creates a static IPv4 entry
 *
 * @param[in] ifaceId      Id of interface upon which to create the IPv4 entry
 * @param[in] prefixLength IPv4 prefix syntax for the subnet mask
 * @param[in] gateway      IPv4 address of this interfaces gateway
 * @param[in] address      IPv4 address to assign to this interface
 * @param[io] asyncResp    Response object that will be returned to client
 *
 * @return None
 */
inline void createIPv4(const std::string& ifaceId, uint8_t prefixLength,
                       const std::string& gateway, const std::string& address,
                       const std::shared_ptr<bmcweb::AsyncResp>& asyncResp)
{
    auto createIpHandler =
        [asyncResp, ifaceId, gateway](const boost::system::error_code ec) {
        if (ec)
        {
            messages::internalError(asyncResp->res);
            return;
        }
        updateIPv4DefaultGateway(ifaceId, gateway, asyncResp);
    };

    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, prefixLength,
        gateway);
}

/**
 * @brief Deletes the IPv4 entry for this interface and creates a replacement
 * static IPv4 entry
 *
 * @param[in] ifaceId      Id of interface upon which to create the IPv4 entry
 * @param[in] id           The unique hash entry identifying the DBus entry
 * @param[in] prefixLength IPv4 prefix syntax for the subnet mask
 * @param[in] gateway      IPv4 address of this interfaces gateway
 * @param[in] address      IPv4 address to assign to this interface
 * @param[io] asyncResp    Response object that will be returned to client
 *
 * @return None
 */
inline void
    deleteAndCreateIPv4(const std::string& ifaceId, const std::string& id,
                        uint8_t prefixLength, const std::string& gateway,
                        const std::string& address,
                        const std::shared_ptr<bmcweb::AsyncResp>& asyncResp)
{
    crow::connections::systemBus->async_method_call(
        [asyncResp, ifaceId, address, prefixLength,
         gateway](const boost::system::error_code ec) {
        if (ec)
        {
            messages::internalError(asyncResp->res);
            return;
        }

        crow::connections::systemBus->async_method_call(
            [asyncResp, ifaceId, gateway](const boost::system::error_code ec2) {
            if (ec2)
            {
                messages::internalError(asyncResp->res);
                return;
            }
            updateIPv4DefaultGateway(ifaceId, gateway, asyncResp);
            },
            "xyz.openbmc_project.Network",
            "/xyz/openbmc_project/network/" + ifaceId,
            "xyz.openbmc_project.Network.IP.Create", "IP",
            "xyz.openbmc_project.Network.IP.Protocol.IPv4", address,
            prefixLength, gateway);
        },
        "xyz.openbmc_project.Network",
        +"/xyz/openbmc_project/network/" + ifaceId + "/ipv4/" + id,
        "xyz.openbmc_project.Object.Delete", "Delete");
}

/**
 * @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<bmcweb::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 Deletes the IPv6 entry for this interface and creates a replacement
 * static IPv6 entry
 *
 * @param[in] ifaceId      Id of interface upon which to create the IPv6 entry
 * @param[in] id           The unique hash entry identifying the DBus entry
 * @param[in] prefixLength IPv6 prefix syntax for the subnet mask
 * @param[in] address      IPv6 address to assign to this interface
 * @param[io] asyncResp    Response object that will be returned to client
 *
 * @return None
 */
inline void
    deleteAndCreateIPv6(const std::string& ifaceId, const std::string& id,
                        uint8_t prefixLength, const std::string& address,
                        const std::shared_ptr<bmcweb::AsyncResp>& asyncResp)
{
    crow::connections::systemBus->async_method_call(
        [asyncResp, ifaceId, address,
         prefixLength](const boost::system::error_code ec) {
        if (ec)
        {
            messages::internalError(asyncResp->res);
        }
        crow::connections::systemBus->async_method_call(
            [asyncResp](const boost::system::error_code ec2) {
            if (ec2)
            {
                messages::internalError(asyncResp->res);
            }
            },
            "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, "");
        },
        "xyz.openbmc_project.Network",
        +"/xyz/openbmc_project/network/" + ifaceId + "/ipv6/" + id,
        "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] 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, uint8_t prefixLength,
                       const std::string& address,
                       const std::shared_ptr<bmcweb::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 associated 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,
        "");
}

/**
 * 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& ethifaceId,
                          CallbackFunc&& callback)
{
    crow::connections::systemBus->async_method_call(
        [ethifaceId{std::string{ethifaceId}},
         callback{std::forward<CallbackFunc>(callback)}](
            const boost::system::error_code errorCode,
            const dbus::utility::ManagedObjectType& resp) {
        EthernetInterfaceData ethData{};
        boost::container::flat_set<IPv4AddressData> ipv4Data;
        boost::container::flat_set<IPv6AddressData> ipv6Data;

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

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

        extractIPData(ethifaceId, resp, ipv4Data);
        // Fix global GW
        for (IPv4AddressData& ipv4 : ipv4Data)
        {
            if (((ipv4.linktype == LinkType::Global) &&
                 (ipv4.gateway == "0.0.0.0")) ||
                (ipv4.origin == "DHCP") || (ipv4.origin == "Static"))
            {
                ipv4.gateway = ethData.defaultGateway;
            }
        }

        extractIPV6Data(ethifaceId, resp, ipv6Data);
        // Finally make a callback with useful data
        callback(true, ethData, ipv4Data, ipv6Data);
        },
        "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::forward<CallbackFunc>(callback)}](
            const boost::system::error_code errorCode,
            dbus::utility::ManagedObjectType& resp) {
        // Callback requires vector<string> to retrieve all available
        // ethernet interfaces
        boost::container::flat_set<std::string> ifaceList;
        ifaceList.reserve(resp.size());
        if (errorCode)
        {
            callback(false, ifaceList);
            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")
                {
                    std::string ifaceId = objpath.first.filename();
                    if (ifaceId.empty())
                    {
                        continue;
                    }
                    // and put it into output vector.
                    ifaceList.emplace(ifaceId);
                }
            }
        }
        // Finally make a callback with useful data
        callback(true, ifaceList);
        },
        "xyz.openbmc_project.Network", "/xyz/openbmc_project/network",
        "org.freedesktop.DBus.ObjectManager", "GetManagedObjects");
}

inline void
    handleHostnamePatch(const std::string& hostname,
                        const std::shared_ptr<bmcweb::AsyncResp>& asyncResp)
{
    // SHOULD handle host names of up to 255 characters(RFC 1123)
    if (hostname.length() > 255)
    {
        messages::propertyValueFormatError(asyncResp->res, hostname,
                                           "HostName");
        return;
    }
    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",
        dbus::utility::DbusVariantType(hostname));
}

inline void
    handleMTUSizePatch(const std::string& ifaceId, const size_t mtuSize,
                       const std::shared_ptr<bmcweb::AsyncResp>& asyncResp)
{
    sdbusplus::message::object_path objPath =
        "/xyz/openbmc_project/network/" + ifaceId;
    crow::connections::systemBus->async_method_call(
        [asyncResp](const boost::system::error_code ec) {
        if (ec)
        {
            messages::internalError(asyncResp->res);
        }
        },
        "xyz.openbmc_project.Network", objPath,
        "org.freedesktop.DBus.Properties", "Set",
        "xyz.openbmc_project.Network.EthernetInterface", "MTU",
        std::variant<size_t>(mtuSize));
}

inline void
    handleDomainnamePatch(const std::string& ifaceId,
                          const std::string& domainname,
                          const std::shared_ptr<bmcweb::AsyncResp>& asyncResp)
{
    std::vector<std::string> vectorDomainname = {domainname};
    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,
        "org.freedesktop.DBus.Properties", "Set",
        "xyz.openbmc_project.Network.EthernetInterface", "DomainName",
        dbus::utility::DbusVariantType(vectorDomainname));
}

inline bool isHostnameValid(const std::string& hostname)
{
    // A valid host name can never have the dotted-decimal form (RFC 1123)
    if (std::all_of(hostname.begin(), hostname.end(), ::isdigit))
    {
        return false;
    }
    // Each label(hostname/subdomains) within a valid FQDN
    // MUST handle host names of up to 63 characters (RFC 1123)
    // labels cannot start or end with hyphens (RFC 952)
    // labels can start with numbers (RFC 1123)
    const std::regex pattern(
        "^[a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\\-]{0,61}[a-zA-Z0-9]$");

    return std::regex_match(hostname, pattern);
}

inline bool isDomainnameValid(const std::string& domainname)
{
    // Can have multiple subdomains
    // Top Level Domain's min length is 2 character
    const std::regex pattern(
        "^([A-Za-z0-9][a-zA-Z0-9\\-]{1,61}|[a-zA-Z0-9]{1,30}\\.)*[a-zA-Z]{2,}$");

    return std::regex_match(domainname, pattern);
}

inline void handleFqdnPatch(const std::string& ifaceId, const std::string& fqdn,
                            const std::shared_ptr<bmcweb::AsyncResp>& asyncResp)
{
    // Total length of FQDN must not exceed 255 characters(RFC 1035)
    if (fqdn.length() > 255)
    {
        messages::propertyValueFormatError(asyncResp->res, fqdn, "FQDN");
        return;
    }

    size_t pos = fqdn.find('.');
    if (pos == std::string::npos)
    {
        messages::propertyValueFormatError(asyncResp->res, fqdn, "FQDN");
        return;
    }

    std::string hostname;
    std::string domainname;
    domainname = (fqdn).substr(pos + 1);
    hostname = (fqdn).substr(0, pos);

    if (!isHostnameValid(hostname) || !isDomainnameValid(domainname))
    {
        messages::propertyValueFormatError(asyncResp->res, fqdn, "FQDN");
        return;
    }

    handleHostnamePatch(hostname, asyncResp);
    handleDomainnamePatch(ifaceId, domainname, asyncResp);
}

inline void
    handleMACAddressPatch(const std::string& ifaceId,
                          const std::string& macAddress,
                          const std::shared_ptr<bmcweb::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",
        dbus::utility::DbusVariantType(macAddress));
}

inline void setDHCPEnabled(const std::string& ifaceId,
                           const std::string& propertyName, const bool v4Value,
                           const bool v6Value,
                           const std::shared_ptr<bmcweb::AsyncResp>& asyncResp)
{
    const std::string dhcp = getDhcpEnabledEnumeration(v4Value, v6Value);
    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;
        }
        messages::success(asyncResp->res);
        },
        "xyz.openbmc_project.Network",
        "/xyz/openbmc_project/network/" + ifaceId,
        "org.freedesktop.DBus.Properties", "Set",
        "xyz.openbmc_project.Network.EthernetInterface", propertyName,
        dbus::utility::DbusVariantType{dhcp});
}

inline void setEthernetInterfaceBoolProperty(
    const std::string& ifaceId, const std::string& propertyName,
    const bool& value, const std::shared_ptr<bmcweb::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,
        dbus::utility::DbusVariantType{value});
}

inline void setDHCPv4Config(const std::string& propertyName, const bool& value,
                            const std::shared_ptr<bmcweb::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,
        dbus::utility::DbusVariantType{value});
}

inline void handleDHCPPatch(const std::string& ifaceId,
                            const EthernetInterfaceData& ethData,
                            const DHCPParameters& v4dhcpParms,
                            const DHCPParameters& v6dhcpParms,
                            const std::shared_ptr<bmcweb::AsyncResp>& asyncResp)
{
    bool ipv4Active = translateDhcpEnabledToBool(ethData.dhcpEnabled, true);
    bool ipv6Active = translateDhcpEnabledToBool(ethData.dhcpEnabled, false);

    bool nextv4DHCPState =
        v4dhcpParms.dhcpv4Enabled ? *v4dhcpParms.dhcpv4Enabled : ipv4Active;

    bool nextv6DHCPState{};
    if (v6dhcpParms.dhcpv6OperatingMode)
    {
        if ((*v6dhcpParms.dhcpv6OperatingMode != "Stateful") &&
            (*v6dhcpParms.dhcpv6OperatingMode != "Stateless") &&
            (*v6dhcpParms.dhcpv6OperatingMode != "Disabled"))
        {
            messages::propertyValueFormatError(asyncResp->res,
                                               *v6dhcpParms.dhcpv6OperatingMode,
                                               "OperatingMode");
            return;
        }
        nextv6DHCPState = (*v6dhcpParms.dhcpv6OperatingMode == "Stateful");
    }
    else
    {
        nextv6DHCPState = ipv6Active;
    }

    bool nextDNS{};
    if (v4dhcpParms.useDnsServers && v6dhcpParms.useDnsServers)
    {
        if (*v4dhcpParms.useDnsServers != *v6dhcpParms.useDnsServers)
        {
            messages::generalError(asyncResp->res);
            return;
        }
        nextDNS = *v4dhcpParms.useDnsServers;
    }
    else if (v4dhcpParms.useDnsServers)
    {
        nextDNS = *v4dhcpParms.useDnsServers;
    }
    else if (v6dhcpParms.useDnsServers)
    {
        nextDNS = *v6dhcpParms.useDnsServers;
    }
    else
    {
        nextDNS = ethData.dnsEnabled;
    }

    bool nextNTP{};
    if (v4dhcpParms.useNtpServers && v6dhcpParms.useNtpServers)
    {
        if (*v4dhcpParms.useNtpServers != *v6dhcpParms.useNtpServers)
        {
            messages::generalError(asyncResp->res);
            return;
        }
        nextNTP = *v4dhcpParms.useNtpServers;
    }
    else if (v4dhcpParms.useNtpServers)
    {
        nextNTP = *v4dhcpParms.useNtpServers;
    }
    else if (v6dhcpParms.useNtpServers)
    {
        nextNTP = *v6dhcpParms.useNtpServers;
    }
    else
    {
        nextNTP = ethData.ntpEnabled;
    }

    bool nextUseDomain{};
    if (v4dhcpParms.useDomainName && v6dhcpParms.useDomainName)
    {
        if (*v4dhcpParms.useDomainName != *v6dhcpParms.useDomainName)
        {
            messages::generalError(asyncResp->res);
            return;
        }
        nextUseDomain = *v4dhcpParms.useDomainName;
    }
    else if (v4dhcpParms.useDomainName)
    {
        nextUseDomain = *v4dhcpParms.useDomainName;
    }
    else if (v6dhcpParms.useDomainName)
    {
        nextUseDomain = *v6dhcpParms.useDomainName;
    }
    else
    {
        nextUseDomain = ethData.hostNameEnabled;
    }

    BMCWEB_LOG_DEBUG << "set DHCPEnabled...";
    setDHCPEnabled(ifaceId, "DHCPEnabled", nextv4DHCPState, nextv6DHCPState,
                   asyncResp);
    BMCWEB_LOG_DEBUG << "set DNSEnabled...";
    setDHCPv4Config("DNSEnabled", nextDNS, asyncResp);
    BMCWEB_LOG_DEBUG << "set NTPEnabled...";
    setDHCPv4Config("NTPEnabled", nextNTP, asyncResp);
    BMCWEB_LOG_DEBUG << "set HostNameEnabled...";
    setDHCPv4Config("HostNameEnabled", nextUseDomain, asyncResp);
}

inline boost::container::flat_set<IPv4AddressData>::const_iterator
    getNextStaticIpEntry(
        const boost::container::flat_set<IPv4AddressData>::const_iterator& head,
        const boost::container::flat_set<IPv4AddressData>::const_iterator& end)
{
    return std::find_if(head, end, [](const IPv4AddressData& value) {
        return value.origin == "Static";
    });
}

inline boost::container::flat_set<IPv6AddressData>::const_iterator
    getNextStaticIpEntry(
        const boost::container::flat_set<IPv6AddressData>::const_iterator& head,
        const boost::container::flat_set<IPv6AddressData>::const_iterator& end)
{
    return std::find_if(head, end, [](const IPv6AddressData& value) {
        return value.origin == "Static";
    });
}

inline void handleIPv4StaticPatch(
    const std::string& ifaceId, nlohmann::json& input,
    const boost::container::flat_set<IPv4AddressData>& ipv4Data,
    const std::shared_ptr<bmcweb::AsyncResp>& asyncResp)
{
    if ((!input.is_array()) || input.empty())
    {
        messages::propertyValueTypeError(
            asyncResp->res,
            input.dump(2, ' ', true, nlohmann::json::error_handler_t::replace),
            "IPv4StaticAddresses");
        return;
    }

    unsigned entryIdx = 1;
    // Find the first static IP address currently active on the NIC and
    // match it to the first JSON element in the IPv4StaticAddresses array.
    // Match each subsequent JSON element to the next static IP programmed
    // into the NIC.
    boost::container::flat_set<IPv4AddressData>::const_iterator nicIpEntry =
        getNextStaticIpEntry(ipv4Data.cbegin(), ipv4Data.cend());

    for (nlohmann::json& thisJson : input)
    {
        std::string pathString =
            "IPv4StaticAddresses/" + std::to_string(entryIdx);

        if (!thisJson.is_null() && !thisJson.empty())
        {
            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))
            {
                messages::propertyValueFormatError(
                    asyncResp->res,
                    thisJson.dump(2, ' ', true,
                                  nlohmann::json::error_handler_t::replace),
                    pathString);
                return;
            }

            // Find the address/subnet/gateway values. Any values that are
            // not explicitly provided are assumed to be unmodified from the
            // current state of the interface. Merge existing state into the
            // current request.
            const std::string* addr = nullptr;
            const std::string* gw = nullptr;
            uint8_t prefixLength = 0;
            bool errorInEntry = false;
            if (address)
            {
                if (ipv4VerifyIpAndGetBitcount(*address))
                {
                    addr = &(*address);
                }
                else
                {
                    messages::propertyValueFormatError(asyncResp->res, *address,
                                                       pathString + "/Address");
                    errorInEntry = true;
                }
            }
            else if (nicIpEntry != ipv4Data.cend())
            {
                addr = &(nicIpEntry->address);
            }
            else
            {
                messages::propertyMissing(asyncResp->res,
                                          pathString + "/Address");
                errorInEntry = true;
            }

            if (subnetMask)
            {
                if (!ipv4VerifyIpAndGetBitcount(*subnetMask, &prefixLength))
                {
                    messages::propertyValueFormatError(
                        asyncResp->res, *subnetMask,
                        pathString + "/SubnetMask");
                    errorInEntry = true;
                }
            }
            else if (nicIpEntry != ipv4Data.cend())
            {
                if (!ipv4VerifyIpAndGetBitcount(nicIpEntry->netmask,
                                                &prefixLength))
                {
                    messages::propertyValueFormatError(
                        asyncResp->res, nicIpEntry->netmask,
                        pathString + "/SubnetMask");
                    errorInEntry = true;
                }
            }
            else
            {
                messages::propertyMissing(asyncResp->res,
                                          pathString + "/SubnetMask");
                errorInEntry = true;
            }

            if (gateway)
            {
                if (ipv4VerifyIpAndGetBitcount(*gateway))
                {
                    gw = &(*gateway);
                }
                else
                {
                    messages::propertyValueFormatError(asyncResp->res, *gateway,
                                                       pathString + "/Gateway");
                    errorInEntry = true;
                }
            }
            else if (nicIpEntry != ipv4Data.cend())
            {
                gw = &nicIpEntry->gateway;
            }
            else
            {
                messages::propertyMissing(asyncResp->res,
                                          pathString + "/Gateway");
                errorInEntry = true;
            }

            if (errorInEntry)
            {
                return;
            }

            if (nicIpEntry != ipv4Data.cend())
            {
                deleteAndCreateIPv4(ifaceId, nicIpEntry->id, prefixLength, *gw,
                                    *addr, asyncResp);
                nicIpEntry =
                    getNextStaticIpEntry(++nicIpEntry, ipv4Data.cend());
            }
            else
            {
                createIPv4(ifaceId, prefixLength, *gateway, *address,
                           asyncResp);
            }
            entryIdx++;
        }
        else
        {
            if (nicIpEntry == ipv4Data.cend())
            {
                // Requesting a DELETE/DO NOT MODIFY action for an item
                // that isn't present on the eth(n) interface. Input JSON is
                // in error, so bail out.
                if (thisJson.is_null())
                {
                    messages::resourceCannotBeDeleted(asyncResp->res);
                    return;
                }
                messages::propertyValueFormatError(
                    asyncResp->res,
                    thisJson.dump(2, ' ', true,
                                  nlohmann::json::error_handler_t::replace),
                    pathString);
                return;
            }

            if (thisJson.is_null())
            {
                deleteIPv4(ifaceId, nicIpEntry->id, asyncResp);
            }
            if (nicIpEntry != ipv4Data.cend())
            {
                nicIpEntry =
                    getNextStaticIpEntry(++nicIpEntry, ipv4Data.cend());
            }
            entryIdx++;
        }
    }
}

inline void handleStaticNameServersPatch(
    const std::string& ifaceId,
    const std::vector<std::string>& updatedStaticNameServers,
    const std::shared_ptr<bmcweb::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", "StaticNameServers",
        dbus::utility::DbusVariantType{updatedStaticNameServers});
}

inline void handleIPv6StaticAddressesPatch(
    const std::string& ifaceId, const nlohmann::json& input,
    const boost::container::flat_set<IPv6AddressData>& ipv6Data,
    const std::shared_ptr<bmcweb::AsyncResp>& asyncResp)
{
    if (!input.is_array() || input.empty())
    {
        messages::propertyValueTypeError(
            asyncResp->res,
            input.dump(2, ' ', true, nlohmann::json::error_handler_t::replace),
            "IPv6StaticAddresses");
        return;
    }
    size_t entryIdx = 1;
    boost::container::flat_set<IPv6AddressData>::const_iterator nicIpEntry =
        getNextStaticIpEntry(ipv6Data.cbegin(), ipv6Data.cend());
    for (const nlohmann::json& thisJson : input)
    {
        std::string pathString =
            "IPv6StaticAddresses/" + std::to_string(entryIdx);

        if (!thisJson.is_null() && !thisJson.empty())
        {
            std::optional<std::string> address;
            std::optional<uint8_t> prefixLength;
            nlohmann::json thisJsonCopy = thisJson;
            if (!json_util::readJson(thisJsonCopy, asyncResp->res, "Address",
                                     address, "PrefixLength", prefixLength))
            {
                messages::propertyValueFormatError(
                    asyncResp->res,
                    thisJson.dump(2, ' ', true,
                                  nlohmann::json::error_handler_t::replace),
                    pathString);
                return;
            }

            const std::string* addr = nullptr;
            uint8_t prefix = 0;

            // Find the address and prefixLength values. Any values that are
            // not explicitly provided are assumed to be unmodified from the
            // current state of the interface. Merge existing state into the
            // current request.
            if (address)
            {
                addr = &(*address);
            }
            else if (nicIpEntry != ipv6Data.end())
            {
                addr = &(nicIpEntry->address);
            }
            else
            {
                messages::propertyMissing(asyncResp->res,
                                          pathString + "/Address");
                return;
            }

            if (prefixLength)
            {
                prefix = *prefixLength;
            }
            else if (nicIpEntry != ipv6Data.end())
            {
                prefix = nicIpEntry->prefixLength;
            }
            else
            {
                messages::propertyMissing(asyncResp->res,
                                          pathString + "/PrefixLength");
                return;
            }

            if (nicIpEntry != ipv6Data.end())
            {
                deleteAndCreateIPv6(ifaceId, nicIpEntry->id, prefix, *addr,
                                    asyncResp);
                nicIpEntry =
                    getNextStaticIpEntry(++nicIpEntry, ipv6Data.cend());
            }
            else
            {
                createIPv6(ifaceId, *prefixLength, *addr, asyncResp);
            }
            entryIdx++;
        }
        else
        {
            if (nicIpEntry == ipv6Data.end())
            {
                // Requesting a DELETE/DO NOT MODIFY action for an item
                // that isn't present on the eth(n) interface. Input JSON is
                // in error, so bail out.
                if (thisJson.is_null())
                {
                    messages::resourceCannotBeDeleted(asyncResp->res);
                    return;
                }
                messages::propertyValueFormatError(
                    asyncResp->res,
                    thisJson.dump(2, ' ', true,
                                  nlohmann::json::error_handler_t::replace),
                    pathString);
                return;
            }

            if (thisJson.is_null())
            {
                deleteIPv6(ifaceId, nicIpEntry->id, asyncResp);
            }
            if (nicIpEntry != ipv6Data.cend())
            {
                nicIpEntry =
                    getNextStaticIpEntry(++nicIpEntry, ipv6Data.cend());
            }
            entryIdx++;
        }
    }
}

inline void parseInterfaceData(
    const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
    const std::string& ifaceId, const EthernetInterfaceData& ethData,
    const boost::container::flat_set<IPv4AddressData>& ipv4Data,
    const boost::container::flat_set<IPv6AddressData>& ipv6Data)
{
    constexpr const std::array<const char*, 1> inventoryForEthernet = {
        "xyz.openbmc_project.Inventory.Item.Ethernet"};

    nlohmann::json& jsonResponse = asyncResp->res.jsonValue;
    jsonResponse["Id"] = ifaceId;
    jsonResponse["@odata.id"] =
        "/redfish/v1/Managers/bmc/EthernetInterfaces/" + ifaceId;
    jsonResponse["InterfaceEnabled"] = ethData.nicEnabled;

    auto health = std::make_shared<HealthPopulate>(asyncResp);

    crow::connections::systemBus->async_method_call(
        [health](const boost::system::error_code ec,
                 const dbus::utility::MapperGetSubTreePathsResponse& resp) {
        if (ec)
        {
            return;
        }

        health->inventory = resp;
        },
        "xyz.openbmc_project.ObjectMapper",
        "/xyz/openbmc_project/object_mapper",
        "xyz.openbmc_project.ObjectMapper", "GetSubTreePaths", "/", int32_t(0),
        inventoryForEthernet);

    health->populate();

    if (ethData.nicEnabled)
    {
        jsonResponse["LinkStatus"] = "LinkUp";
        jsonResponse["Status"]["State"] = "Enabled";
    }
    else
    {
        jsonResponse["LinkStatus"] = "NoLink";
        jsonResponse["Status"]["State"] = "Disabled";
    }

    jsonResponse["LinkStatus"] = ethData.linkUp ? "LinkUp" : "LinkDown";
    jsonResponse["SpeedMbps"] = ethData.speed;
    jsonResponse["MTUSize"] = ethData.mtuSize;
    jsonResponse["MACAddress"] = ethData.macAddress;
    jsonResponse["DHCPv4"]["DHCPEnabled"] =
        translateDhcpEnabledToBool(ethData.dhcpEnabled, true);
    jsonResponse["DHCPv4"]["UseNTPServers"] = ethData.ntpEnabled;
    jsonResponse["DHCPv4"]["UseDNSServers"] = ethData.dnsEnabled;
    jsonResponse["DHCPv4"]["UseDomainName"] = ethData.hostNameEnabled;

    jsonResponse["DHCPv6"]["OperatingMode"] =
        translateDhcpEnabledToBool(ethData.dhcpEnabled, false) ? "Stateful"
                                                               : "Disabled";
    jsonResponse["DHCPv6"]["UseNTPServers"] = ethData.ntpEnabled;
    jsonResponse["DHCPv6"]["UseDNSServers"] = ethData.dnsEnabled;
    jsonResponse["DHCPv6"]["UseDomainName"] = ethData.hostNameEnabled;

    if (!ethData.hostName.empty())
    {
        jsonResponse["HostName"] = ethData.hostName;

        // When domain name is empty then it means, that it is a network
        // without domain names, and the host name itself must be treated as
        // FQDN
        std::string fqdn = ethData.hostName;
        if (!ethData.domainnames.empty())
        {
            fqdn += "." + ethData.domainnames[0];
        }
        jsonResponse["FQDN"] = fqdn;
    }

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

    jsonResponse["NameServers"] = ethData.nameServers;
    jsonResponse["StaticNameServers"] = ethData.staticNameServers;

    nlohmann::json& ipv4Array = jsonResponse["IPv4Addresses"];
    nlohmann::json& ipv4StaticArray = jsonResponse["IPv4StaticAddresses"];
    ipv4Array = nlohmann::json::array();
    ipv4StaticArray = nlohmann::json::array();
    for (const auto& ipv4Config : ipv4Data)
    {

        std::string gatewayStr = ipv4Config.gateway;
        if (gatewayStr.empty())
        {
            gatewayStr = "0.0.0.0";
        }
        nlohmann::json::object_t ipv4;
        ipv4["AddressOrigin"] = ipv4Config.origin;
        ipv4["SubnetMask"] = ipv4Config.netmask;
        ipv4["Address"] = ipv4Config.address;
        ipv4["Gateway"] = gatewayStr;

        if (ipv4Config.origin == "Static")
        {
            ipv4StaticArray.push_back(ipv4);
        }

        ipv4Array.push_back(std::move(ipv4));
    }

    std::string ipv6GatewayStr = ethData.ipv6DefaultGateway;
    if (ipv6GatewayStr.empty())
    {
        ipv6GatewayStr = "0:0:0:0:0:0:0:0";
    }

    jsonResponse["IPv6DefaultGateway"] = ipv6GatewayStr;

    nlohmann::json& ipv6Array = jsonResponse["IPv6Addresses"];
    nlohmann::json& ipv6StaticArray = jsonResponse["IPv6StaticAddresses"];
    ipv6Array = nlohmann::json::array();
    ipv6StaticArray = nlohmann::json::array();
    nlohmann::json& ipv6AddrPolicyTable =
        jsonResponse["IPv6AddressPolicyTable"];
    ipv6AddrPolicyTable = nlohmann::json::array();
    for (const auto& ipv6Config : ipv6Data)
    {
        nlohmann::json::object_t ipv6;
        ipv6["Address"] = ipv6Config.address;
        ipv6["PrefixLength"] = ipv6Config.prefixLength;
        ipv6["AddressOrigin"] = ipv6Config.origin;
        ipv6["AddressState"] = nullptr;
        ipv6Array.push_back(std::move(ipv6));
        if (ipv6Config.origin == "Static")
        {
            nlohmann::json::object_t ipv6Static;
            ipv6Static["Address"] = ipv6Config.address;
            ipv6Static["PrefixLength"] = ipv6Config.prefixLength;
            ipv6StaticArray.push_back(std::move(ipv6Static));
        }
    }
}

inline void parseInterfaceData(nlohmann::json& jsonResponse,
                               const std::string& parentIfaceId,
                               const std::string& ifaceId,
                               const EthernetInterfaceData& ethData)
{
    // Fill out obvious data...
    jsonResponse["Id"] = ifaceId;
    jsonResponse["@odata.id"] = "/redfish/v1/Managers/bmc/EthernetInterfaces/" +
                                parentIfaceId + "/VLANs/" + ifaceId;

    jsonResponse["VLANEnable"] = true;
    if (ethData.vlanId)
    {
        jsonResponse["VLANId"] = *ethData.vlanId;
    }
}

inline bool verifyNames(const std::string& parent, const std::string& iface)
{
    return iface.starts_with(parent + "_");
}

inline void requestEthernetInterfacesRoutes(App& app)
{
    BMCWEB_ROUTE(app, "/redfish/v1/Managers/bmc/EthernetInterfaces/")
        .privileges(redfish::privileges::getEthernetInterfaceCollection)
        .methods(boost::beast::http::verb::get)(
            [&app](const crow::Request& req,
                   const std::shared_ptr<bmcweb::AsyncResp>& asyncResp) {
        if (!redfish::setUpRedfishRoute(app, req, asyncResp))
        {
            return;
        }

        asyncResp->res.jsonValue["@odata.type"] =
            "#EthernetInterfaceCollection.EthernetInterfaceCollection";
        asyncResp->res.jsonValue["@odata.id"] =
            "/redfish/v1/Managers/bmc/EthernetInterfaces";
        asyncResp->res.jsonValue["Name"] =
            "Ethernet Network Interface Collection";
        asyncResp->res.jsonValue["Description"] =
            "Collection of EthernetInterfaces for this Manager";

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

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

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

    BMCWEB_ROUTE(app, "/redfish/v1/Managers/bmc/EthernetInterfaces/<str>/")
        .privileges(redfish::privileges::getEthernetInterface)
        .methods(boost::beast::http::verb::get)(
            [&app](const crow::Request& req,
                   const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                   const std::string& ifaceId) {
        if (!redfish::setUpRedfishRoute(app, req, asyncResp))
        {
            return;
        }
        getEthernetIfaceData(
            ifaceId,
            [asyncResp, ifaceId](
                const bool& success, const EthernetInterfaceData& ethData,
                const boost::container::flat_set<IPv4AddressData>& ipv4Data,
                const boost::container::flat_set<IPv6AddressData>& ipv6Data) {
            if (!success)
            {
                // TODO(Pawel)consider distinguish between non
                // existing object, and other errors
                messages::resourceNotFound(asyncResp->res, "EthernetInterface",
                                           ifaceId);
                return;
            }

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

            parseInterfaceData(asyncResp, ifaceId, ethData, ipv4Data, ipv6Data);
            });
        });

    BMCWEB_ROUTE(app, "/redfish/v1/Managers/bmc/EthernetInterfaces/<str>/")
        .privileges(redfish::privileges::patchEthernetInterface)
        .methods(boost::beast::http::verb::patch)(
            [&app](const crow::Request& req,
                   const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                   const std::string& ifaceId) {
        if (!redfish::setUpRedfishRoute(app, req, asyncResp))
        {
            return;
        }
        std::optional<std::string> hostname;
        std::optional<std::string> fqdn;
        std::optional<std::string> macAddress;
        std::optional<std::string> ipv6DefaultGateway;
        std::optional<nlohmann::json> ipv4StaticAddresses;
        std::optional<nlohmann::json> ipv6StaticAddresses;
        std::optional<std::vector<std::string>> staticNameServers;
        std::optional<nlohmann::json> dhcpv4;
        std::optional<nlohmann::json> dhcpv6;
        std::optional<bool> interfaceEnabled;
        std::optional<size_t> mtuSize;
        DHCPParameters v4dhcpParms;
        DHCPParameters v6dhcpParms;

        if (!json_util::readJsonPatch(
                req, asyncResp->res, "HostName", hostname, "FQDN", fqdn,
                "IPv4StaticAddresses", ipv4StaticAddresses, "MACAddress",
                macAddress, "StaticNameServers", staticNameServers,
                "IPv6DefaultGateway", ipv6DefaultGateway, "IPv6StaticAddresses",
                ipv6StaticAddresses, "DHCPv4", dhcpv4, "DHCPv6", dhcpv6,
                "MTUSize", mtuSize, "InterfaceEnabled", interfaceEnabled))
        {
            return;
        }
        if (dhcpv4)
        {
            if (!json_util::readJson(*dhcpv4, asyncResp->res, "DHCPEnabled",
                                     v4dhcpParms.dhcpv4Enabled, "UseDNSServers",
                                     v4dhcpParms.useDnsServers, "UseNTPServers",
                                     v4dhcpParms.useNtpServers, "UseDomainName",
                                     v4dhcpParms.useDomainName))
            {
                return;
            }
        }

        if (dhcpv6)
        {
            if (!json_util::readJson(*dhcpv6, asyncResp->res, "OperatingMode",
                                     v6dhcpParms.dhcpv6OperatingMode,
                                     "UseDNSServers", v6dhcpParms.useDnsServers,
                                     "UseNTPServers", v6dhcpParms.useNtpServers,
                                     "UseDomainName",
                                     v6dhcpParms.useDomainName))
            {
                return;
            }
        }

        // Get single eth interface data, and call the below callback
        // for JSON preparation
        getEthernetIfaceData(
            ifaceId,
            [asyncResp, ifaceId, hostname = std::move(hostname),
             fqdn = std::move(fqdn), macAddress = std::move(macAddress),
             ipv4StaticAddresses = std::move(ipv4StaticAddresses),
             ipv6DefaultGateway = std::move(ipv6DefaultGateway),
             ipv6StaticAddresses = std::move(ipv6StaticAddresses),
             staticNameServers = std::move(staticNameServers),
             dhcpv4 = std::move(dhcpv4), dhcpv6 = std::move(dhcpv6), mtuSize,
             v4dhcpParms = std::move(v4dhcpParms),
             v6dhcpParms = std::move(v6dhcpParms), interfaceEnabled](
                const bool& success, const EthernetInterfaceData& ethData,
                const boost::container::flat_set<IPv4AddressData>& ipv4Data,
                const boost::container::flat_set<IPv6AddressData>& ipv6Data) {
            if (!success)
            {
                // ... otherwise return error
                // TODO(Pawel)consider distinguish between non
                // existing object, and other errors
                messages::resourceNotFound(asyncResp->res, "Ethernet Interface",
                                           ifaceId);
                return;
            }

            if (dhcpv4 || dhcpv6)
            {
                handleDHCPPatch(ifaceId, ethData, v4dhcpParms, v6dhcpParms,
                                asyncResp);
            }

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

            if (fqdn)
            {
                handleFqdnPatch(ifaceId, *fqdn, asyncResp);
            }

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

            if (ipv4StaticAddresses)
            {
                // 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 ipv4Static = *ipv4StaticAddresses;
                handleIPv4StaticPatch(ifaceId, ipv4Static, ipv4Data, asyncResp);
            }

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

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

            if (ipv6StaticAddresses)
            {
                const nlohmann::json& ipv6Static = *ipv6StaticAddresses;
                handleIPv6StaticAddressesPatch(ifaceId, ipv6Static, ipv6Data,
                                               asyncResp);
            }

            if (interfaceEnabled)
            {
                setEthernetInterfaceBoolProperty(ifaceId, "NICEnabled",
                                                 *interfaceEnabled, asyncResp);
            }

            if (mtuSize)
            {
                handleMTUSizePatch(ifaceId, *mtuSize, asyncResp);
            }
            });
        });

    BMCWEB_ROUTE(
        app, "/redfish/v1/Managers/bmc/EthernetInterfaces/<str>/VLANs/<str>/")
        .privileges(redfish::privileges::getVLanNetworkInterface)
        .methods(boost::beast::http::verb::get)(
            [&app](const crow::Request& req,
                   const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                   const std::string& parentIfaceId,
                   const std::string& ifaceId) {
        if (!redfish::setUpRedfishRoute(app, req, asyncResp))
        {
            return;
        }
        asyncResp->res.jsonValue["@odata.type"] =
            "#VLanNetworkInterface.v1_1_0.VLanNetworkInterface";
        asyncResp->res.jsonValue["Name"] = "VLAN Network Interface";

        if (!verifyNames(parentIfaceId, ifaceId))
        {
            return;
        }

        // Get single eth interface data, and call the below callback
        // for JSON preparation
        getEthernetIfaceData(
            ifaceId,
            [asyncResp, parentIfaceId,
             ifaceId](const bool& success, const EthernetInterfaceData& ethData,
                      const boost::container::flat_set<IPv4AddressData>&,
                      const boost::container::flat_set<IPv6AddressData>&) {
            if (success && ethData.vlanId)
            {
                parseInterfaceData(asyncResp->res.jsonValue, parentIfaceId,
                                   ifaceId, ethData);
            }
            else
            {
                // ... otherwise return error
                // TODO(Pawel)consider distinguish between non
                // existing object, and other errors
                messages::resourceNotFound(asyncResp->res,
                                           "VLAN Network Interface", ifaceId);
            }
            });
        });

    BMCWEB_ROUTE(
        app, "/redfish/v1/Managers/bmc/EthernetInterfaces/<str>/VLANs/<str>/")
        .privileges(redfish::privileges::patchVLanNetworkInterface)
        .methods(boost::beast::http::verb::patch)(
            [&app](const crow::Request& req,
                   const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                   const std::string& parentIfaceId,
                   const std::string& ifaceId) {
        if (!redfish::setUpRedfishRoute(app, req, asyncResp))
        {
            return;
        }
        if (!verifyNames(parentIfaceId, ifaceId))
        {
            messages::resourceNotFound(asyncResp->res, "VLAN Network Interface",
                                       ifaceId);
            return;
        }

        std::optional<bool> vlanEnable;
        std::optional<uint32_t> vlanId;

        if (!json_util::readJsonPatch(req, asyncResp->res, "VLANEnable",
                                      vlanEnable, "VLANId", vlanId))
        {
            return;
        }

        if (vlanId)
        {
            messages::propertyNotWritable(asyncResp->res, "VLANId");
            return;
        }

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

                if (vlanEnable && !(*vlanEnable))
                {
                    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;
            }
            });
        });

    BMCWEB_ROUTE(
        app, "/redfish/v1/Managers/bmc/EthernetInterfaces/<str>/VLANs/<str>/")
        .privileges(redfish::privileges::deleteVLanNetworkInterface)
        .methods(boost::beast::http::verb::delete_)(
            [&app](const crow::Request& req,
                   const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                   const std::string& parentIfaceId,
                   const std::string& ifaceId) {
        if (!redfish::setUpRedfishRoute(app, req, asyncResp))
        {
            return;
        }
        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(
            ifaceId,
            [asyncResp, parentIfaceId,
             ifaceId](const bool& success, const EthernetInterfaceData& ethData,
                      const boost::container::flat_set<IPv4AddressData>&,
                      const boost::container::flat_set<IPv6AddressData>&) {
            if (success && ethData.vlanId)
            {
                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);
            }
            });
        });

    BMCWEB_ROUTE(app,
                 "/redfish/v1/Managers/bmc/EthernetInterfaces/<str>/VLANs/")

        .privileges(redfish::privileges::getVLanNetworkInterfaceCollection)
        .methods(boost::beast::http::verb::get)(
            [&app](const crow::Request& req,
                   const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                   const std::string& rootInterfaceName) {
        if (!redfish::setUpRedfishRoute(app, req, asyncResp))
        {
            return;
        }
        // Get eth interface list, and call the below callback for JSON
        // preparation
        getEthernetIfaceList(
            [asyncResp, rootInterfaceName](
                const bool& success,
                const boost::container::flat_set<std::string>& ifaceList) {
            if (!success)
            {
                messages::internalError(asyncResp->res);
                return;
            }

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

            asyncResp->res.jsonValue["@odata.type"] =
                "#VLanNetworkInterfaceCollection."
                "VLanNetworkInterfaceCollection";
            asyncResp->res.jsonValue["Name"] =
                "VLAN Network Interface Collection";

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

            for (const std::string& ifaceItem : ifaceList)
            {
                if (ifaceItem.starts_with(rootInterfaceName + "_"))
                {
                    std::string path =
                        "/redfish/v1/Managers/bmc/EthernetInterfaces/";
                    path += rootInterfaceName;
                    path += "/VLANs/";
                    path += ifaceItem;
                    nlohmann::json::object_t iface;
                    iface["@odata.id"] = std::move(path);
                    ifaceArray.push_back(std::move(iface));
                }
            }

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

    BMCWEB_ROUTE(app,
                 "/redfish/v1/Managers/bmc/EthernetInterfaces/<str>/VLANs/")
        .privileges(redfish::privileges::postVLanNetworkInterfaceCollection)
        .methods(boost::beast::http::verb::post)(
            [&app](const crow::Request& req,
                   const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                   const std::string& rootInterfaceName) {
        if (!redfish::setUpRedfishRoute(app, req, asyncResp))
        {
            return;
        }
        bool vlanEnable = false;
        uint32_t vlanId = 0;
        if (!json_util::readJsonPatch(req, asyncResp->res, "VLANId", vlanId,
                                      "VLANEnable", vlanEnable))
        {
            return;
        }
        // Need both vlanId and vlanEnable to service this request
        if (vlanId == 0U)
        {
            messages::propertyMissing(asyncResp->res, "VLANId");
        }
        if (!vlanEnable)
        {
            messages::propertyMissing(asyncResp->res, "VLANEnable");
        }
        if (static_cast<bool>(vlanId) ^ vlanEnable)
        {
            return;
        }

        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