xref: /openbmc/bmcweb/features/redfish/lib/hypervisor_system.hpp (revision 4fbaf64a931675f57382eef9cf1c6cd88c75ad1e)

#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 <utils/json_utils.hpp>

#include <optional>
#include <utility>
#include <variant>

namespace redfish
{

/**
 * @brief Retrieves hypervisor state properties over dbus
 *
 * The hypervisor state object is optional so this function will only set the
 * state variables if the object is found
 *
 * @param[in] aResp     Shared pointer for completing asynchronous calls.
 *
 * @return None.
 */
inline void getHypervisorState(const std::shared_ptr<AsyncResp>& aResp)
{
    BMCWEB_LOG_DEBUG << "Get hypervisor state information.";
    crow::connections::systemBus->async_method_call(
        [aResp](const boost::system::error_code ec,
                const std::variant<std::string>& hostState) {
            if (ec)
            {
                BMCWEB_LOG_DEBUG << "DBUS response error " << ec;
                // This is an optional D-Bus object so just return if
                // error occurs
                return;
            }

            const std::string* s = std::get_if<std::string>(&hostState);
            if (s == nullptr)
            {
                messages::internalError(aResp->res);
                return;
            }

            BMCWEB_LOG_DEBUG << "Hypervisor state: " << *s;
            // Verify Host State
            if (*s == "xyz.openbmc_project.State.Host.HostState.Running")
            {
                aResp->res.jsonValue["PowerState"] = "On";
                aResp->res.jsonValue["Status"]["State"] = "Enabled";
            }
            else if (*s == "xyz.openbmc_project.State.Host.HostState."
                           "Quiesced")
            {
                aResp->res.jsonValue["PowerState"] = "On";
                aResp->res.jsonValue["Status"]["State"] = "Quiesced";
            }
            else if (*s == "xyz.openbmc_project.State.Host.HostState."
                           "Standby")
            {
                aResp->res.jsonValue["PowerState"] = "On";
                aResp->res.jsonValue["Status"]["State"] = "StandbyOffline";
            }
            else if (*s == "xyz.openbmc_project.State.Host.HostState."
                           "TransitioningToRunning")
            {
                aResp->res.jsonValue["PowerState"] = "PoweringOn";
                aResp->res.jsonValue["Status"]["State"] = "Starting";
            }
            else if (*s == "xyz.openbmc_project.State.Host.HostState."
                           "TransitioningToOff")
            {
                aResp->res.jsonValue["PowerState"] = "PoweringOff";
                aResp->res.jsonValue["Status"]["State"] = "Enabled";
            }
            else if (*s == "xyz.openbmc_project.State.Host.HostState.Off")
            {
                aResp->res.jsonValue["PowerState"] = "Off";
                aResp->res.jsonValue["Status"]["State"] = "Disabled";
            }
            else
            {
                messages::internalError(aResp->res);
                return;
            }
        },
        "xyz.openbmc_project.State.Hypervisor",
        "/xyz/openbmc_project/state/hypervisor0",
        "org.freedesktop.DBus.Properties", "Get",
        "xyz.openbmc_project.State.Host", "CurrentHostState");
}

/**
 * @brief Populate Actions if any are valid for hypervisor object
 *
 * The hypervisor state object is optional so this function will only set the
 * Action if the object is found
 *
 * @param[in] aResp     Shared pointer for completing asynchronous calls.
 *
 * @return None.
 */
inline void getHypervisorActions(const std::shared_ptr<AsyncResp>& aResp)
{
    BMCWEB_LOG_DEBUG << "Get hypervisor actions.";
    crow::connections::systemBus->async_method_call(
        [aResp](
            const boost::system::error_code ec,
            const std::vector<std::pair<std::string, std::vector<std::string>>>&
                objInfo) {
            if (ec)
            {
                BMCWEB_LOG_DEBUG << "DBUS response error " << ec;
                // This is an optional D-Bus object so just return if
                // error occurs
                return;
            }

            if (objInfo.size() == 0)
            {
                // As noted above, this is an optional interface so just return
                // if there is no instance found
                return;
            }

            if (objInfo.size() > 1)
            {
                // More then one hypervisor object is not supported and is an
                // error
                messages::internalError(aResp->res);
                return;
            }

            // Object present so system support limited ComputerSystem Action
            aResp->res.jsonValue["Actions"]["#ComputerSystem.Reset"] = {
                {"target",
                 "/redfish/v1/Systems/hypervisor/Actions/ComputerSystem.Reset"},
                {"@Redfish.ActionInfo",
                 "/redfish/v1/Systems/hypervisor/ResetActionInfo"}};
        },
        "xyz.openbmc_project.ObjectMapper",
        "/xyz/openbmc_project/object_mapper",
        "xyz.openbmc_project.ObjectMapper", "GetObject",
        "/xyz/openbmc_project/state/hypervisor0",
        std::array<const char*, 1>{"xyz.openbmc_project.State.Host"});
}

/**
 * Hypervisor Systems derived class for delivering Computer Systems Schema.
 */
class HypervisorSystem : public Node
{
  public:
    /*
     * Default Constructor
     */
    HypervisorSystem(App& app) : Node(app, "/redfish/v1/Systems/hypervisor/")
    {
        entityPrivileges = {
            {boost::beast::http::verb::get, {{"Login"}}},
            {boost::beast::http::verb::head, {{"Login"}}},
            {boost::beast::http::verb::patch, {{"ConfigureComponents"}}}};
    }

  private:
    /**
     * Functions triggers appropriate requests on DBus
     */
    void doGet(crow::Response& res, const crow::Request&,
               const std::vector<std::string>&) override
    {
        std::shared_ptr<AsyncResp> asyncResp = std::make_shared<AsyncResp>(res);
        crow::connections::systemBus->async_method_call(
            [asyncResp](const boost::system::error_code ec,
                        const std::variant<std::string>& /*hostName*/) {
                if (ec)
                {
                    messages::resourceNotFound(asyncResp->res, "System",
                                               "hypervisor");
                    return;
                }
                BMCWEB_LOG_DEBUG << "Hypervisor is available";

                asyncResp->res.jsonValue["@odata.type"] =
                    "#ComputerSystem.v1_6_0.ComputerSystem";
                asyncResp->res.jsonValue["@odata.id"] =
                    "/redfish/v1/Systems/hypervisor";
                asyncResp->res.jsonValue["Description"] = "Hypervisor";
                asyncResp->res.jsonValue["Name"] = "Hypervisor";
                asyncResp->res.jsonValue["Id"] = "hypervisor";
                asyncResp->res.jsonValue["Links"]["ManagedBy"] = {
                    {{"@odata.id", "/redfish/v1/Managers/bmc"}}};
                asyncResp->res.jsonValue["EthernetInterfaces"] = {
                    {"@odata.id", "/redfish/v1/Systems/hypervisor/"
                                  "EthernetInterfaces"}};
                getHypervisorState(asyncResp);
                getHypervisorActions(asyncResp);
                // TODO: Add "SystemType" : "hypervisor"
            },
            "xyz.openbmc_project.Settings",
            "/xyz/openbmc_project/network/hypervisor",
            "org.freedesktop.DBus.Properties", "Get",
            "xyz.openbmc_project.Network.SystemConfiguration", "HostName");
    }
};

/**
 * HypervisorInterfaceCollection class to handle the GET and PATCH on Hypervisor
 * Interface
 */
class HypervisorInterfaceCollection : public Node
{
  public:
    HypervisorInterfaceCollection(App& app) :
        Node(app, "/redfish/v1/Systems/hypervisor/EthernetInterfaces/")
    {
        entityPrivileges = {
            {boost::beast::http::verb::get, {{"Login"}}},
            {boost::beast::http::verb::head, {{"Login"}}},
            {boost::beast::http::verb::patch, {{"ConfigureComponents"}}}};
    }

  private:
    /**
     * Functions triggers appropriate requests on DBus
     */
    void doGet(crow::Response& res, const crow::Request&,
               const std::vector<std::string>&) override
    {
        std::shared_ptr<AsyncResp> asyncResp = std::make_shared<AsyncResp>(res);
        const std::array<const char*, 1> interfaces = {
            "xyz.openbmc_project.Network.EthernetInterface"};

        crow::connections::systemBus->async_method_call(
            [asyncResp](const boost::system::error_code error,
                        const std::vector<std::string>& ifaceList) {
                if (error)
                {
                    messages::resourceNotFound(asyncResp->res, "System",
                                               "hypervisor");
                    return;
                }
                asyncResp->res.jsonValue["@odata.type"] =
                    "#EthernetInterfaceCollection."
                    "EthernetInterfaceCollection";
                asyncResp->res.jsonValue["@odata.id"] =
                    "/redfish/v1/Systems/hypervisor/EthernetInterfaces";
                asyncResp->res.jsonValue["Name"] = "Hypervisor Ethernet "
                                                   "Interface Collection";
                asyncResp->res.jsonValue["Description"] =
                    "Collection of Virtual Management "
                    "Interfaces for the hypervisor";

                nlohmann::json& ifaceArray =
                    asyncResp->res.jsonValue["Members"];
                ifaceArray = nlohmann::json::array();
                for (const std::string& iface : ifaceList)
                {
                    sdbusplus::message::object_path path(iface);
                    std::string name = path.filename();
                    if (name.empty())
                    {
                        continue;
                    }

                    ifaceArray.push_back(
                        {{"@odata.id", "/redfish/v1/Systems/hypervisor/"
                                       "EthernetInterfaces/" +
                                           name}});
                }
                asyncResp->res.jsonValue["Members@odata.count"] =
                    ifaceArray.size();
            },
            "xyz.openbmc_project.ObjectMapper",
            "/xyz/openbmc_project/object_mapper",
            "xyz.openbmc_project.ObjectMapper", "GetSubTreePaths",
            "/xyz/openbmc_project/network/hypervisor", 0, interfaces);
    }
};

inline bool extractHypervisorInterfaceData(
    const std::string& ethIfaceId, const GetManagedObjects& dbusData,
    EthernetInterfaceData& ethData,
    boost::container::flat_set<IPv4AddressData>& ipv4Config)
{
    bool idFound = false;
    for (const auto& objpath : dbusData)
    {
        for (const auto& ifacePair : objpath.second)
        {
            if (objpath.first ==
                "/xyz/openbmc_project/network/hypervisor/" + 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.mac_address = *mac;
                            }
                        }
                    }
                }
                else if (ifacePair.first ==
                         "xyz.openbmc_project.Network.EthernetInterface")
                {
                    for (const auto& propertyPair : ifacePair.second)
                    {
                        if (propertyPair.first == "DHCPEnabled")
                        {
                            const std::string* dhcp =
                                std::get_if<std::string>(&propertyPair.second);
                            if (dhcp != nullptr)
                            {
                                ethData.DHCPEnabled = *dhcp;
                                break; // Interested on only "DHCPEnabled".
                                       // Stop parsing since we got the
                                       // "DHCPEnabled" value.
                            }
                        }
                    }
                }
            }
            if (objpath.first == "/xyz/openbmc_project/network/hypervisor/" +
                                     ethIfaceId + "/ipv4/addr0")
            {
                std::pair<boost::container::flat_set<IPv4AddressData>::iterator,
                          bool>
                    it = ipv4Config.insert(IPv4AddressData{});
                IPv4AddressData& ipv4Address = *it.first;
                if (ifacePair.first == "xyz.openbmc_project.Object.Enable")
                {
                    for (auto& property : ifacePair.second)
                    {
                        if (property.first == "Enabled")
                        {
                            const bool* intfEnable =
                                std::get_if<bool>(&property.second);
                            if (intfEnable != nullptr)
                            {
                                ipv4Address.isActive = *intfEnable;
                                break;
                            }
                        }
                    }
                }
                if (ifacePair.first == "xyz.openbmc_project.Network.IP")
                {
                    for (auto& property : ifacePair.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
                        {
                            BMCWEB_LOG_ERROR
                                << "Got extra property: " << property.first
                                << " on the " << objpath.first.str << " object";
                        }
                    }
                }
            }
            if (objpath.first == "/xyz/openbmc_project/network/hypervisor")
            {
                // 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;
                            }
                        }
                        else if (propertyPair.first == "DefaultGateway")
                        {
                            const std::string* defaultGateway =
                                std::get_if<std::string>(&propertyPair.second);
                            if (defaultGateway != nullptr)
                            {
                                ethData.default_gateway = *defaultGateway;
                            }
                        }
                    }
                }
            }
        }
    }
    return idFound;
}
/**
 * Function that retrieves all properties for given Hypervisor Ethernet
 * Interface Object from Settings Manager
 * @param ethIfaceId Hypervisor ethernet interface id to query on DBus
 * @param callback a function that shall be called to convert Dbus output
 * into JSON
 */
template <typename CallbackFunc>
void getHypervisorIfaceData(const std::string& ethIfaceId,
                            CallbackFunc&& callback)
{
    crow::connections::systemBus->async_method_call(
        [ethIfaceId{std::string{ethIfaceId}},
         callback{std::move(callback)}](const boost::system::error_code error,
                                        const GetManagedObjects& resp) {
            EthernetInterfaceData ethData{};
            boost::container::flat_set<IPv4AddressData> ipv4Data;
            if (error)
            {
                callback(false, ethData, ipv4Data);
                return;
            }

            bool found = extractHypervisorInterfaceData(ethIfaceId, resp,
                                                        ethData, ipv4Data);
            if (!found)
            {
                BMCWEB_LOG_INFO << "Hypervisor Interface not found";
            }
            callback(found, ethData, ipv4Data);
        },
        "xyz.openbmc_project.Settings", "/",
        "org.freedesktop.DBus.ObjectManager", "GetManagedObjects");
}

/**
 * @brief Sets the Hypervisor Interface IPAddress DBUS
 *
 * @param[in] aResp          Shared pointer for generating response message.
 * @param[in] ipv4Address    Address from the incoming request
 * @param[in] ethIfaceId     Hypervisor Interface Id
 *
 * @return None.
 */
inline void setHypervisorIPv4Address(const std::shared_ptr<AsyncResp>& aResp,
                                     const std::string& ethIfaceId,
                                     const std::string& ipv4Address)
{
    BMCWEB_LOG_DEBUG << "Setting the Hypervisor IPaddress : " << ipv4Address
                     << " on Iface: " << ethIfaceId;
    crow::connections::systemBus->async_method_call(
        [aResp](const boost::system::error_code ec) {
            if (ec)
            {
                BMCWEB_LOG_ERROR << "DBUS response error " << ec;
                return;
            }
            BMCWEB_LOG_DEBUG << "Hypervisor IPaddress is Set";
        },
        "xyz.openbmc_project.Settings",
        "/xyz/openbmc_project/network/hypervisor/" + ethIfaceId + "/ipv4/addr0",
        "org.freedesktop.DBus.Properties", "Set",
        "xyz.openbmc_project.Network.IP", "Address",
        std::variant<std::string>(ipv4Address));
}

/**
 * @brief Sets the Hypervisor Interface SubnetMask DBUS
 *
 * @param[in] aResp     Shared pointer for generating response message.
 * @param[in] subnet    SubnetMask from the incoming request
 * @param[in] ethIfaceId Hypervisor Interface Id
 *
 * @return None.
 */
inline void setHypervisorIPv4Subnet(const std::shared_ptr<AsyncResp>& aResp,
                                    const std::string& ethIfaceId,
                                    const uint8_t subnet)
{
    BMCWEB_LOG_DEBUG << "Setting the Hypervisor subnet : " << subnet
                     << " on Iface: " << ethIfaceId;

    crow::connections::systemBus->async_method_call(
        [aResp](const boost::system::error_code ec) {
            if (ec)
            {
                BMCWEB_LOG_ERROR << "DBUS response error " << ec;
                return;
            }
            BMCWEB_LOG_DEBUG << "SubnetMask is Set";
        },
        "xyz.openbmc_project.Settings",
        "/xyz/openbmc_project/network/hypervisor/" + ethIfaceId + "/ipv4/addr0",
        "org.freedesktop.DBus.Properties", "Set",
        "xyz.openbmc_project.Network.IP", "PrefixLength",
        std::variant<uint8_t>(subnet));
}

/**
 * @brief Sets the Hypervisor Interface Gateway DBUS
 *
 * @param[in] aResp          Shared pointer for generating response message.
 * @param[in] gateway        Gateway from the incoming request
 * @param[in] ethIfaceId     Hypervisor Interface Id
 *
 * @return None.
 */
inline void setHypervisorIPv4Gateway(const std::shared_ptr<AsyncResp>& aResp,
                                     const std::string& gateway)
{
    BMCWEB_LOG_DEBUG
        << "Setting the DefaultGateway to the last configured gateway";

    crow::connections::systemBus->async_method_call(
        [aResp](const boost::system::error_code ec) {
            if (ec)
            {
                BMCWEB_LOG_ERROR << "DBUS response error " << ec;
                return;
            }
            BMCWEB_LOG_DEBUG << "Default Gateway is Set";
        },
        "xyz.openbmc_project.Settings",
        "/xyz/openbmc_project/network/hypervisor",
        "org.freedesktop.DBus.Properties", "Set",
        "xyz.openbmc_project.Network.SystemConfiguration", "DefaultGateway",
        std::variant<std::string>(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 createHypervisorIPv4(const std::string& ifaceId,
                                 uint8_t prefixLength,
                                 const std::string& gateway,
                                 const std::string& address,
                                 const std::shared_ptr<AsyncResp>& asyncResp)
{
    setHypervisorIPv4Address(asyncResp, ifaceId, address);
    setHypervisorIPv4Gateway(asyncResp, gateway);
    setHypervisorIPv4Subnet(asyncResp, ifaceId, prefixLength);
}

/**
 * @brief Deletes given IPv4 interface
 *
 * @param[in] ifaceId     Id of interface whose IP should be deleted
 * @param[io] asyncResp   Response object that will be returned to client
 *
 * @return None
 */
inline void deleteHypervisorIPv4(const std::string& ifaceId,
                                 const std::shared_ptr<AsyncResp>& asyncResp)
{
    std::string address = "0.0.0.0";
    std::string gateway = "0.0.0.0";
    const uint8_t prefixLength = 0;
    setHypervisorIPv4Address(asyncResp, ifaceId, address);
    setHypervisorIPv4Gateway(asyncResp, gateway);
    setHypervisorIPv4Subnet(asyncResp, ifaceId, prefixLength);
}

/**
 * HypervisorInterface derived class for delivering Ethernet Schema
 */
class HypervisorInterface : public Node
{
  public:
    /*
     * Default Constructor
     */
    HypervisorInterface(App& app) :
        Node(app, "/redfish/v1/Systems/hypervisor/EthernetInterfaces/<str>/",
             std::string())
    {
        entityPrivileges = {
            {boost::beast::http::verb::get, {{"Login"}}},
            {boost::beast::http::verb::head, {{"Login"}}},
            {boost::beast::http::verb::patch, {{"ConfigureComponents"}}}};
    }

  private:
    void parseInterfaceData(
        nlohmann::json& jsonResponse, const std::string& ifaceId,
        const EthernetInterfaceData& ethData,
        const boost::container::flat_set<IPv4AddressData>& ipv4Data)
    {
        jsonResponse["Id"] = ifaceId;
        jsonResponse["@odata.id"] =
            "/redfish/v1/Systems/hypervisor/EthernetInterfaces/" + ifaceId;
        jsonResponse["InterfaceEnabled"] = true;
        jsonResponse["MACAddress"] = ethData.mac_address;

        jsonResponse["HostName"] = ethData.hostname;
        jsonResponse["DHCPv4"]["DHCPEnabled"] =
            translateDHCPEnabledToBool(ethData.DHCPEnabled, true);

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

                ipv4Array.push_back({{"AddressOrigin", ipv4Config.origin},
                                     {"SubnetMask", ipv4Config.netmask},
                                     {"Address", ipv4Config.address},
                                     {"Gateway", ethData.default_gateway}});
                if (ipv4Config.origin == "Static")
                {
                    ipv4StaticArray.push_back(
                        {{"AddressOrigin", ipv4Config.origin},
                         {"SubnetMask", ipv4Config.netmask},
                         {"Address", ipv4Config.address},
                         {"Gateway", ethData.default_gateway}});
                }
            }
        }
    }

    void handleHypervisorIPv4StaticPatch(
        const std::string& ifaceId, const nlohmann::json& input,
        const std::shared_ptr<AsyncResp>& asyncResp)
    {
        if ((!input.is_array()) || input.empty())
        {
            messages::propertyValueTypeError(asyncResp->res, input.dump(),
                                             "IPv4StaticAddresses");
            return;
        }

        // Hypervisor considers the first IP address in the array list
        // as the Hypervisor's virtual management interface supports single IPv4
        // address
        const nlohmann::json& thisJson = input[0];

        // For the error string
        std::string pathString = "IPv4StaticAddresses/1";

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

            uint8_t prefixLength = 0;
            bool errorInEntry = false;
            if (address)
            {
                if (!ipv4VerifyIpAndGetBitcount(*address))
                {
                    messages::propertyValueFormatError(asyncResp->res, *address,
                                                       pathString + "/Address");
                    errorInEntry = true;
                }
            }
            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
            {
                messages::propertyMissing(asyncResp->res,
                                          pathString + "/SubnetMask");
                errorInEntry = true;
            }

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

            if (errorInEntry)
            {
                return;
            }

            BMCWEB_LOG_DEBUG << "Calling createHypervisorIPv4 on : " << ifaceId
                             << "," << *address;
            createHypervisorIPv4(ifaceId, prefixLength, *gateway, *address,
                                 asyncResp);
            // Set the DHCPEnabled to false since the Static IPv4 is set
            setDHCPEnabled(ifaceId, false, asyncResp);
        }
        else
        {
            if (thisJson.is_null())
            {
                deleteHypervisorIPv4(ifaceId, asyncResp);
            }
        }
    }

    bool isHostnameValid(const std::string& hostName)
    {
        // As per RFC 1123
        // Allow up to 255 characters
        if (hostName.length() > 255)
        {
            return false;
        }
        // Validate the regex
        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);
    }

    void handleHostnamePatch(const std::string& hostName,
                             const std::shared_ptr<AsyncResp>& asyncResp)
    {
        if (!isHostnameValid(hostName))
        {
            messages::propertyValueFormatError(asyncResp->res, hostName,
                                               "HostName");
            return;
        }

        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.Settings",
            "/xyz/openbmc_project/network/hypervisor",
            "org.freedesktop.DBus.Properties", "Set",
            "xyz.openbmc_project.Network.SystemConfiguration", "HostName",
            std::variant<std::string>(hostName));
    }

    void setIPv4InterfaceEnabled(const std::string& ifaceId,
                                 const bool& isActive,
                                 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.Settings",
            "/xyz/openbmc_project/network/hypervisor/" + ifaceId +
                "/ipv4/addr0",
            "org.freedesktop.DBus.Properties", "Set",
            "xyz.openbmc_project.Object.Enable", "Enabled",
            std::variant<bool>(isActive));
    }

    void setDHCPEnabled(const std::string& ifaceId, const bool& ipv4DHCPEnabled,
                        const std::shared_ptr<AsyncResp>& asyncResp)
    {
        const std::string dhcp =
            getDhcpEnabledEnumeration(ipv4DHCPEnabled, false);
        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.Settings",
            "/xyz/openbmc_project/network/hypervisor/" + ifaceId,
            "org.freedesktop.DBus.Properties", "Set",
            "xyz.openbmc_project.Network.EthernetInterface", "DHCPEnabled",
            std::variant<std::string>{dhcp});

        // Set the IPv4 address origin to the DHCP / Static as per the new value
        // of the DHCPEnabled property
        std::string origin;
        if (ipv4DHCPEnabled == false)
        {
            origin = "xyz.openbmc_project.Network.IP.AddressOrigin.Static";
        }
        else
        {
            // DHCPEnabled is set to true. Delete the current IPv4 settings
            // to receive the new values from DHCP server.
            deleteHypervisorIPv4(ifaceId, asyncResp);
            origin = "xyz.openbmc_project.Network.IP.AddressOrigin.DHCP";
        }
        crow::connections::systemBus->async_method_call(
            [asyncResp](const boost::system::error_code ec) {
                if (ec)
                {
                    BMCWEB_LOG_ERROR << "DBUS response error " << ec;
                    messages::internalError(asyncResp->res);
                    return;
                }
                BMCWEB_LOG_DEBUG << "Hypervisor IPaddress Origin is Set";
            },
            "xyz.openbmc_project.Settings",
            "/xyz/openbmc_project/network/hypervisor/" + ifaceId +
                "/ipv4/addr0",
            "org.freedesktop.DBus.Properties", "Set",
            "xyz.openbmc_project.Network.IP", "Origin",
            std::variant<std::string>(origin));
    }

    /**
     * Functions triggers appropriate requests on DBus
     */
    void doGet(crow::Response& res, const crow::Request&,
               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;
        }

        getHypervisorIfaceData(
            params[0],
            [this, asyncResp, ifaceId{std::string(params[0])}](
                const bool& success, const EthernetInterfaceData& ethData,
                const boost::container::flat_set<IPv4AddressData>& ipv4Data) {
                if (!success)
                {
                    messages::resourceNotFound(asyncResp->res,
                                               "EthernetInterface", ifaceId);
                    return;
                }
                asyncResp->res.jsonValue["@odata.type"] =
                    "#EthernetInterface.v1_5_1.EthernetInterface";
                asyncResp->res.jsonValue["Name"] =
                    "Hypervisor Ethernet Interface";
                asyncResp->res.jsonValue["Description"] =
                    "Hypervisor's Virtual Management Ethernet Interface";
                parseInterfaceData(asyncResp->res.jsonValue, ifaceId, ethData,
                                   ipv4Data);
            });
    }

    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& ifaceId = params[0];
        std::optional<std::string> hostName;
        std::optional<nlohmann::json> ipv4StaticAddresses;
        std::optional<nlohmann::json> ipv4Addresses;
        std::optional<nlohmann::json> dhcpv4;
        std::optional<bool> ipv4DHCPEnabled;

        if (!json_util::readJson(req, res, "HostName", hostName,
                                 "IPv4StaticAddresses", ipv4StaticAddresses,
                                 "IPv4Addresses", ipv4Addresses, "DHCPv4",
                                 dhcpv4))
        {
            return;
        }

        if (ipv4Addresses)
        {
            messages::propertyNotWritable(asyncResp->res, "IPv4Addresses");
        }

        if (dhcpv4)
        {
            if (!json_util::readJson(*dhcpv4, res, "DHCPEnabled",
                                     ipv4DHCPEnabled))
            {
                return;
            }
        }

        getHypervisorIfaceData(
            ifaceId,
            [this, asyncResp, ifaceId, hostName = std::move(hostName),
             ipv4StaticAddresses = std::move(ipv4StaticAddresses),
             ipv4DHCPEnabled, dhcpv4 = std::move(dhcpv4)](
                const bool& success, const EthernetInterfaceData& ethData,
                const boost::container::flat_set<IPv4AddressData>&) {
                if (!success)
                {
                    messages::resourceNotFound(asyncResp->res,
                                               "EthernetInterface", ifaceId);
                    return;
                }

                if (ipv4StaticAddresses)
                {
                    const nlohmann::json& ipv4Static = *ipv4StaticAddresses;
                    const nlohmann::json& ipv4Json = ipv4Static[0];
                    // Check if the param is 'null'. If its null, it means that
                    // user wants to delete the IP address. Deleting the IP
                    // address is allowed only if its statically configured.
                    // Deleting the address originated from DHCP is not allowed.
                    if ((ipv4Json.is_null()) &&
                        (translateDHCPEnabledToBool(ethData.DHCPEnabled, true)))
                    {
                        BMCWEB_LOG_INFO
                            << "Ignoring the delete on ipv4StaticAddresses "
                               "as the interface is DHCP enabled";
                    }
                    else
                    {
                        handleHypervisorIPv4StaticPatch(ifaceId, ipv4Static,
                                                        asyncResp);
                    }
                }

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

                if (dhcpv4)
                {
                    setDHCPEnabled(ifaceId, *ipv4DHCPEnabled, asyncResp);
                }

                // Set this interface to disabled/inactive. This will be set to
                // enabled/active by the pldm once the hypervisor consumes the
                // updated settings from the user.
                setIPv4InterfaceEnabled(ifaceId, false, asyncResp);
            });
        res.result(boost::beast::http::status::accepted);
    }
};

/**
 * HypervisorResetActionInfo derived class for delivering Computer Systems
 * ResetType AllowableValues using ResetInfo schema.
 */
class HypervisorResetActionInfo : public Node
{
  public:
    /*
     * Default Constructor
     */
    HypervisorResetActionInfo(App& app) :
        Node(app, "/redfish/v1/Systems/hypervisor/ResetActionInfo/")
    {
        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&,
               const std::vector<std::string>&) override
    {
        std::shared_ptr<AsyncResp> asyncResp = std::make_shared<AsyncResp>(res);

        // Only return action info if hypervisor D-Bus object present
        crow::connections::systemBus->async_method_call(
            [asyncResp](const boost::system::error_code ec,
                        const std::vector<std::pair<
                            std::string, std::vector<std::string>>>& objInfo) {
                if (ec)
                {
                    BMCWEB_LOG_DEBUG << "DBUS response error " << ec;

                    // No hypervisor objects found by mapper
                    if (ec.value() == boost::system::errc::io_error)
                    {
                        messages::resourceNotFound(asyncResp->res, "hypervisor",
                                                   "ResetActionInfo");
                        return;
                    }

                    messages::internalError(asyncResp->res);
                    return;
                }

                // One and only one hypervisor instance supported
                if (objInfo.size() != 1)
                {
                    messages::internalError(asyncResp->res);
                    return;
                }

                // The hypervisor object only support the ability to turn On
                // The system object Action should be utilized for other
                // operations
                asyncResp->res.jsonValue = {
                    {"@odata.type", "#ActionInfo.v1_1_2.ActionInfo"},
                    {"@odata.id",
                     "/redfish/v1/Systems/hypervisor/ResetActionInfo"},
                    {"Name", "Reset Action Info"},
                    {"Id", "ResetActionInfo"},
                    {"Parameters",
                     {{{"Name", "ResetType"},
                       {"Required", true},
                       {"DataType", "String"},
                       {"AllowableValues", {"On"}}}}}};
            },
            "xyz.openbmc_project.ObjectMapper",
            "/xyz/openbmc_project/object_mapper",
            "xyz.openbmc_project.ObjectMapper", "GetObject",
            "/xyz/openbmc_project/state/hypervisor0",
            std::array<const char*, 1>{"xyz.openbmc_project.State.Host"});
    }
};

/**
 * HypervisorActionsReset class supports the POST method for Reset action.
 * The class sends data directly to D-Bus.
 */
class HypervisorActionsReset : public Node
{
  public:
    HypervisorActionsReset(App& app) :
        Node(app,
             "/redfish/v1/Systems/hypervisor/Actions/ComputerSystem.Reset/")
    {
        entityPrivileges = {
            {boost::beast::http::verb::post, {{"ConfigureComponents"}}}};
    }

  private:
    /**
     * Function handles POST method request.
     * Analyzes POST body message before sends Reset request data to D-Bus.
     */
    void doPost(crow::Response& res, const crow::Request& req,
                const std::vector<std::string>&) override
    {
        std::shared_ptr<AsyncResp> asyncResp = std::make_shared<AsyncResp>(res);

        std::optional<std::string> resetType;
        if (!json_util::readJson(req, res, "ResetType", resetType))
        {
            // readJson adds appropriate error to response
            return;
        }

        if (!resetType)
        {
            messages::actionParameterMissing(
                asyncResp->res, "ComputerSystem.Reset", "ResetType");
            return;
        }

        // Hypervisor object only support On operation
        if (resetType != "On")
        {
            messages::propertyValueNotInList(asyncResp->res, *resetType,
                                             "ResetType");
            return;
        }

        std::string command = "xyz.openbmc_project.State.Host.Transition.On";

        crow::connections::systemBus->async_method_call(
            [asyncResp, resetType](const boost::system::error_code ec) {
                if (ec)
                {
                    BMCWEB_LOG_ERROR << "D-Bus responses error: " << ec;
                    if (ec.value() == boost::asio::error::invalid_argument)
                    {
                        messages::actionParameterNotSupported(
                            asyncResp->res, *resetType, "Reset");
                        return;
                    }

                    if (ec.value() == boost::asio::error::host_unreachable)
                    {
                        messages::resourceNotFound(asyncResp->res, "Actions",
                                                   "Reset");
                        return;
                    }

                    messages::internalError(asyncResp->res);
                    return;
                }
                messages::success(asyncResp->res);
            },
            "xyz.openbmc_project.State.Hypervisor",
            "/xyz/openbmc_project/state/hypervisor0",
            "org.freedesktop.DBus.Properties", "Set",
            "xyz.openbmc_project.State.Host", "RequestedHostTransition",
            std::variant<std::string>{std::move(command)});
    }
};
} // namespace redfish