#include "chassishandler.h"
#include "host-ipmid/ipmid-api.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <mapper.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <limits.h>
#include <string.h>
#include <endian.h>
#include <sstream>
#include <array>
#include <phosphor-logging/log.hpp>
#include <xyz/openbmc_project/State/Host/server.hpp>
#include "config.h"

//Defines
#define SET_PARM_VERSION                     0x01
#define SET_PARM_BOOT_FLAGS_PERMANENT        0x40 //boot flags data1 7th bit on
#define SET_PARM_BOOT_FLAGS_VALID_ONE_TIME   0x80 //boot flags data1 8th bit on
#define SET_PARM_BOOT_FLAGS_VALID_PERMANENT  0xC0 //boot flags data1 7 & 8 bit on

constexpr size_t SIZE_MAC  = 18;
constexpr size_t SIZE_BOOT_OPTION = (uint8_t)BootOptionResponseSize::
                                             OPAL_NETWORK_SETTINGS;//Maximum size of the boot option parametrs
constexpr size_t SIZE_PREFIX = 7;
constexpr size_t MAX_PREFIX_VALUE = 32;
constexpr size_t SIZE_COOKIE = 4;
constexpr size_t SIZE_VERSION = 2;
constexpr auto   MAC_ADDRESS_FORMAT = "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx";
constexpr auto   IP_ADDRESS_FORMAT = "%d.%d.%d.%d";
constexpr auto   PREFIX_FORMAT = "%hhd";
constexpr auto   ADDR_TYPE_FORMAT = "%hhx";
//PetiBoot-Specific
static constexpr uint8_t net_conf_initial_bytes[] = {0x80,0x21, 0x70 ,0x62 ,0x21,
                                  0x00 ,0x01 ,0x06 ,0x04};

static constexpr size_t COOKIE_OFFSET = 1;
static constexpr size_t VERSION_OFFSET = 5;
static constexpr size_t MAC_OFFSET = 9;
static constexpr size_t ADDRTYPE_OFFSET = 16;
static constexpr size_t IPADDR_OFFSET = 17;
static constexpr size_t PREFIX_OFFSET = 21;
static constexpr size_t GATEWAY_OFFSET = 22;


void register_netfn_chassis_functions() __attribute__((constructor));

// Host settings in dbus
// Service name should be referenced by connection name got via object mapper
const char *settings_object_name  =  "/org/openbmc/settings/host0";
const char *settings_intf_name    =  "org.freedesktop.DBus.Properties";
const char *host_intf_name        =  "org.openbmc.settings.Host";

typedef struct
{
    uint8_t cap_flags;
    uint8_t fru_info_dev_addr;
    uint8_t sdr_dev_addr;
    uint8_t sel_dev_addr;
    uint8_t system_management_dev_addr;
    uint8_t bridge_dev_addr;
}__attribute__((packed)) ipmi_chassis_cap_t;

typedef struct
{
   uint8_t cur_power_state;
   uint8_t last_power_event;
   uint8_t misc_power_state;
   uint8_t front_panel_button_cap_status;
}__attribute__((packed)) ipmi_get_chassis_status_t;

// Phosphor Host State manager
namespace State = sdbusplus::xyz::openbmc_project::State::server;

int dbus_get_property(const char *name, char **buf)
{
    sd_bus_error error = SD_BUS_ERROR_NULL;
    sd_bus_message *m = NULL;
    sd_bus *bus = NULL;
    char *temp_buf = NULL;
    char *connection = NULL;
    int r;

    // Get the system bus where most system services are provided.
    bus = ipmid_get_sd_bus_connection();

    r = mapper_get_service(bus, settings_object_name, &connection);
    if (r < 0) {
        fprintf(stderr, "Failed to get %s connection: %s\n",
                settings_object_name, strerror(-r));
        goto finish;
    }

    /*
     * Bus, service, object path, interface and method are provided to call
     * the method.
     * Signatures and input arguments are provided by the arguments at the
     * end.
     */
    r = sd_bus_call_method(bus,
                           connection,                                 /* service to contact */
                           settings_object_name,                       /* object path */
                           settings_intf_name,                         /* interface name */
                           "Get",                                      /* method name */
                           &error,                                     /* object to return error in */
                           &m,                                         /* return message on success */
                           "ss",                                       /* input signature */
                           host_intf_name,                             /* first argument */
                           name);                                      /* second argument */

    if (r < 0) {
        fprintf(stderr, "Failed to issue method call: %s\n", error.message);
        goto finish;
    }

    /*
     * The output should be parsed exactly the same as the output formatting
     * specified.
     */
    r = sd_bus_message_read(m, "v", "s", &temp_buf);
    if (r < 0) {
        fprintf(stderr, "Failed to parse response message: %s\n", strerror(-r));
        goto finish;
    }

    *buf = strdup(temp_buf);
/*    *buf = (char*) malloc(strlen(temp_buf));
    if (*buf) {
        strcpy(*buf, temp_buf);
    }
*/
    printf("IPMID boot option property get: {%s}.\n", (char *) temp_buf);

finish:
    sd_bus_error_free(&error);
    sd_bus_message_unref(m);
    free(connection);

    return r;
}

int dbus_set_property(const char * name, const char *value)
{
    sd_bus_error error = SD_BUS_ERROR_NULL;
    sd_bus_message *m = NULL;
    sd_bus *bus = NULL;
    char *connection = NULL;
    int r;

    // Get the system bus where most system services are provided.
    bus = ipmid_get_sd_bus_connection();

    r = mapper_get_service(bus, settings_object_name, &connection);
    if (r < 0) {
        fprintf(stderr, "Failed to get %s connection: %s\n",
                settings_object_name, strerror(-r));
        goto finish;
    }

    /*
     * Bus, service, object path, interface and method are provided to call
     * the method.
     * Signatures and input arguments are provided by the arguments at the
     * end.
     */
    r = sd_bus_call_method(bus,
                           connection,                                 /* service to contact */
                           settings_object_name,                       /* object path */
                           settings_intf_name,                         /* interface name */
                           "Set",                                      /* method name */
                           &error,                                     /* object to return error in */
                           &m,                                         /* return message on success */
                           "ssv",                                      /* input signature */
                           host_intf_name,                             /* first argument */
                           name,                                       /* second argument */
                           "s",                                        /* third argument */
                           value);                                     /* fourth argument */

    if (r < 0) {
        fprintf(stderr, "Failed to issue method call: %s\n", error.message);
        goto finish;
    }

    printf("IPMID boot option property set: {%s}.\n", value);

finish:
    sd_bus_error_free(&error);
    sd_bus_message_unref(m);
    free(connection);

    return r;
}

struct get_sys_boot_options_t {
    uint8_t parameter;
    uint8_t set;
    uint8_t block;
}  __attribute__ ((packed));

struct get_sys_boot_options_response_t {
    uint8_t version;
    uint8_t parm;
    uint8_t data[SIZE_BOOT_OPTION];
}  __attribute__ ((packed));

struct set_sys_boot_options_t {
    uint8_t parameter;
    uint8_t data[SIZE_BOOT_OPTION];
}  __attribute__ ((packed));

struct host_network_config_t {
    std::string ipaddress;
    std::string prefix;
    std::string gateway;
    std::string macaddress;
    std::string addrType;

    host_network_config_t()=default;
};

void fillNetworkConfig( host_network_config_t & host_config ,
                        const std::string& conf_str ) {

    constexpr auto COMMA_DELIMITER = ",";
    constexpr auto EQUAL_DELIMITER = "=";
    size_t  commaDelimtrPos = 0;
    size_t  equalDelimtrPos = 0,commaDelimtrPrevPos = 0;
    std::string value;
    while ( commaDelimtrPos < conf_str.length() ) {

        commaDelimtrPos = conf_str.find(COMMA_DELIMITER,commaDelimtrPos);
        //This condition is to extract the last
        //Substring as we will not be having the delimeter
        //at end. std::string::npos is -1

        if ( commaDelimtrPos == std::string::npos ) {
            commaDelimtrPos = conf_str.length();
        }

        equalDelimtrPos = conf_str.find (EQUAL_DELIMITER,commaDelimtrPrevPos);

        //foo,ipaddress=1234
        if ( equalDelimtrPos == std::string::npos ) {

            commaDelimtrPos++;
            commaDelimtrPrevPos= commaDelimtrPos;
            continue;
        }

        value = conf_str.substr((equalDelimtrPos+1),
                commaDelimtrPos-(equalDelimtrPos+1));

#ifdef _IPMI_DEBUG_
        printf ("Name=[%s],Value=[%s],commaDelimtrPos=[%d],\
                commaDelimtrPrevPos=[%d],equalDelimtrPos=[%d]\n",
                name.c_str(),value.c_str(),commaDelimtrPos,
                commaDelimtrPrevPos,equalDelimtrPos);
#endif

        if ( 0 == conf_str.compare(commaDelimtrPrevPos,
                    equalDelimtrPos-commaDelimtrPrevPos,"ipaddress" )) {

           host_config.ipaddress = std::move(value);
        }
        else if ( 0 == conf_str.compare(commaDelimtrPrevPos,
                    equalDelimtrPos-commaDelimtrPrevPos,"prefix" )) {

           host_config.prefix = std::move(value);
        }
        else if ( 0 == conf_str.compare(commaDelimtrPrevPos,
                    equalDelimtrPos-commaDelimtrPrevPos, "gateway" )) {
            host_config.gateway = std::move(value);
        }
        else if ( 0 == conf_str.compare(commaDelimtrPrevPos,
                    equalDelimtrPos-commaDelimtrPrevPos, "mac" )) {
            host_config.macaddress = std::move(value);
        }
        else if ( 0 == conf_str.compare(commaDelimtrPrevPos,
                    equalDelimtrPos-commaDelimtrPrevPos, "addr_type" )) {
            host_config.addrType = std::move(value);
        }

        commaDelimtrPos++;
        commaDelimtrPrevPos= commaDelimtrPos;
    }
}

int  getHostNetworkData(get_sys_boot_options_response_t* respptr)
{

    char *prop = nullptr;
    int rc = dbus_get_property("network_config",&prop);

    if ( rc < 0 ) {
        fprintf(stderr, "Dbus get property(boot_flags) failed\
                for get_sys_boot_options.\n");
        return rc;
    }

    std::string conf_str(prop);

    if ( prop ) {

        free(prop);
        prop = nullptr;
    }

    /* network_config property Value would be in the form of
     * ipaddress=1.1.1.1,prefix=16,gateway=2.2.2.2,mac=11:22:33:44:55:66,dhcp=0
     */

    /* Parsing the string and fill the hostconfig structure with the
     * values */

    printf ("Configuration String[%s]\n ",conf_str.c_str());

    host_network_config_t host_config;

    // Fill the host_config from the configuration string
    fillNetworkConfig(host_config,conf_str);

    //Assigning the index as intialByteLength as it is fixed and prefilled.
    printf ("host_config.macaddress.c_str()=[%s]\n",host_config.macaddress.c_str());
    do{

        rc = sscanf(host_config.macaddress.c_str(),MAC_ADDRESS_FORMAT,
             (respptr->data+MAC_OFFSET), (respptr->data+MAC_OFFSET+1),
             (respptr->data+MAC_OFFSET+2),(respptr->data+MAC_OFFSET+3),
             (respptr->data+MAC_OFFSET+4), (respptr->data+MAC_OFFSET+5));


        if ( rc < 6 ){
            fprintf(stderr, "sscanf Failed in extracting mac address.\n");
            rc = -1;
            break;
        }

        //Conevrt the dhcp,ipaddress,mask and gateway as hex number
        respptr->data[MAC_OFFSET+6]=0x00;

        rc = sscanf(host_config.addrType.c_str(),ADDR_TYPE_FORMAT,
                   (respptr->data+ADDRTYPE_OFFSET));

        if ( rc <= 0 ) {
            fprintf(stderr, "sscanf Failed in extracting address type.\n");
            rc = -1;
            break;
        }

        //ipaddress and gateway would be in IPv4 format
        rc = inet_pton(AF_INET,host_config.ipaddress.c_str(),
                      (respptr->data+IPADDR_OFFSET));

        if ( rc <= 0 ) {
            fprintf(stderr, "inet_pton failed during ipaddress coneversion\n");
            rc = -1;
            break;
        }

        rc = sscanf(host_config.prefix.c_str(),PREFIX_FORMAT,
                                               (respptr->data+PREFIX_OFFSET));

        if ( rc <= 0 ) {
            fprintf(stderr, "sscanf failed during prefix extraction.\n");
            rc = -1;
            break;
        }

        rc = inet_pton(AF_INET,host_config.gateway.c_str(),
                      (respptr->data+GATEWAY_OFFSET));

        if ( rc <= 0 ) {
            fprintf(stderr, "inet_pton failed during gateway conversion.\n");
            rc = -1;
            break;
        }

    }while (0);

    if ( rc ) {

        //PetiBoot-Specific
        //If sucess then copy the first 9 bytes to the data
        //else set the respptr to 0

        memcpy(respptr->data,net_conf_initial_bytes,
                sizeof(net_conf_initial_bytes));

#ifdef _IPMI_DEBUG_
        printf ("\n===Printing the IPMI Formatted Data========\n");

        for ( uint8_t pos = 0; pos<index; pos++ )
            printf("%02x ", respptr->data[pos]);
#endif

    }else {

        memset(respptr->data,0,SIZE_BOOT_OPTION);
    }

    return rc;
}

int setHostNetworkData(set_sys_boot_options_t * reqptr)
{
    std::string host_network_config;
    char mac[SIZE_MAC] = {0};
    char ipAddress[INET_ADDRSTRLEN] = {0};
    char gateway[INET_ADDRSTRLEN] = {0};
    char dhcp[SIZE_PREFIX] = {0};
    char prefix[SIZE_PREFIX] = {0};
    int rc = 0;
    uint32_t zeroCookie=0;

    //cookie starts from second byte
    // version starts from sixth byte

    do {

        // cookie ==  0x21 0x70 0x62 0x21
        if ( memcmp(&(reqptr->data[COOKIE_OFFSET]),
                    (net_conf_initial_bytes+COOKIE_OFFSET),
                    SIZE_COOKIE) != 0 ) {
            //cookie == 0
            if (  memcmp(&(reqptr->data[COOKIE_OFFSET]),
                        &zeroCookie,
                        SIZE_COOKIE) == 0 ) {
                rc = 0;
                break;
            }
            //Invalid cookie
            fprintf(stderr, "Invalid Cookie\n");
            rc = -1;
            break;
        }
        // vesion == 0x00 0x01
        if ( memcmp(&(reqptr->data[VERSION_OFFSET]),
                    (net_conf_initial_bytes+VERSION_OFFSET),
                    SIZE_VERSION) != 0 ) {

            fprintf(stderr, "Invalid Version\n");
            rc = -1;
            break;
        }

        snprintf(mac, SIZE_MAC, MAC_ADDRESS_FORMAT,
                reqptr->data[MAC_OFFSET],
                reqptr->data[MAC_OFFSET+1],
                reqptr->data[MAC_OFFSET+2],
                reqptr->data[MAC_OFFSET+3],
                reqptr->data[MAC_OFFSET+4],
                reqptr->data[MAC_OFFSET+5]);

        snprintf(dhcp,SIZE_PREFIX, ADDR_TYPE_FORMAT, reqptr->data[ADDRTYPE_OFFSET]);
        //Validating the address  type which could be
        //either static or dynamic
        if( *(reqptr->data+ADDRTYPE_OFFSET) > 1 ) {

            fprintf(stderr, "Invalid Address Type\n");
            rc = -1;
            break;

        }

        snprintf(ipAddress, INET_ADDRSTRLEN, IP_ADDRESS_FORMAT,
                reqptr->data[IPADDR_OFFSET], reqptr->data[IPADDR_OFFSET+1],
                reqptr->data[IPADDR_OFFSET+2], reqptr->data[IPADDR_OFFSET+3]);

        //validating prefix
        if ( *(reqptr->data+PREFIX_OFFSET) > (uint8_t)MAX_PREFIX_VALUE ) {

            fprintf(stderr, "Invalid Prefix\n");
            rc = -1;
            break;
        }

        snprintf(prefix,SIZE_PREFIX,PREFIX_FORMAT, reqptr->data[PREFIX_OFFSET]);

        snprintf(gateway, INET_ADDRSTRLEN,IP_ADDRESS_FORMAT,
                reqptr->data[GATEWAY_OFFSET], reqptr->data[GATEWAY_OFFSET+1],
                reqptr->data[GATEWAY_OFFSET+2], reqptr->data[GATEWAY_OFFSET+3]);


    }while(0);

    if( !rc )
    {
        //Cookie == 0 or it is a valid cookie
        host_network_config += "ipaddress="+std::string(ipAddress)+",prefix="+ 
            std::string(prefix)+",gateway="+std::string(gateway)+
            ",mac="+std::string(mac)+",addr_type="+std::string(dhcp);

        printf ("Network configuration changed: %s\n",host_network_config.c_str());

        rc = dbus_set_property("network_config",host_network_config.c_str());

        if ( rc < 0 ) {
            fprintf(stderr, "Dbus set property(network_config)\
                    failed for set_sys_boot_options.\n");
            rc = -1;
        }

    }
    return rc;
}

ipmi_ret_t ipmi_chassis_wildcard(ipmi_netfn_t netfn, ipmi_cmd_t cmd, 
                              ipmi_request_t request, ipmi_response_t response, 
                              ipmi_data_len_t data_len, ipmi_context_t context)
{
    printf("Handling CHASSIS WILDCARD Netfn:[0x%X], Cmd:[0x%X]\n",netfn, cmd);
    // Status code.
    ipmi_ret_t rc = IPMI_CC_INVALID;
    *data_len = 0;
    return rc;
}

ipmi_ret_t ipmi_get_chassis_cap(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                             ipmi_request_t request, ipmi_response_t response,
                             ipmi_data_len_t data_len, ipmi_context_t context)
{
    // sd_bus error
    ipmi_ret_t rc = IPMI_CC_OK;

    ipmi_chassis_cap_t chassis_cap{};

    *data_len = sizeof(ipmi_chassis_cap_t);

    // TODO: need future work. Get those flag from MRW.

    // capabilities flags
    // [7..4] - reserved
    // [3] – 1b = provides power interlock  (IPM 1.5)
    // [2] – 1b = provides Diagnostic Interrupt (FP NMI)
    // [1] – 1b = provides “Front Panel Lockout” (indicates that the chassis has capabilities
    //            to lock out external power control and reset button or front panel interfaces
    //            and/or detect tampering with those interfaces).
    // [0] -1b = Chassis provides intrusion (physical security) sensor.
    // set to default value 0x0.
    chassis_cap.cap_flags = 0x0;

    // Since we do not have a separate SDR Device/SEL Device/ FRU repository.
    // The 20h was given as those 5 device addresses.
    // Chassis FRU info Device Address
    chassis_cap.fru_info_dev_addr = 0x20;

    // Chassis SDR Device Address
    chassis_cap.sdr_dev_addr = 0x20;

    // Chassis SEL Device Address
    chassis_cap.sel_dev_addr = 0x20;

    // Chassis System Management Device Address
    chassis_cap.system_management_dev_addr = 0x20;

    // Chassis Bridge Device Address.
    chassis_cap.bridge_dev_addr = 0x20;

    memcpy(response, &chassis_cap, *data_len);

    return rc;
}

//------------------------------------------
// Calls into Host State Manager Dbus object
//------------------------------------------
int initiate_state_transition(State::Host::Transition transition)
{
	using namespace phosphor::logging;

	// OpenBMC Host State Manager dbus framework
	constexpr auto HOST_STATE_MANAGER_ROOT  = "/xyz/openbmc_project/state/host0";
	constexpr auto HOST_STATE_MANAGER_IFACE = "xyz.openbmc_project.State.Host";
	constexpr auto DBUS_PROPERTY_IFACE      = "org.freedesktop.DBus.Properties";
	constexpr auto PROPERTY                 = "RequestedHostTransition";

	// sd_bus error
	int rc = 0;
	char  *busname = NULL;

	// SD Bus error report mechanism.
	sd_bus_error bus_error = SD_BUS_ERROR_NULL;

	// Gets a hook onto either a SYSTEM or SESSION bus
	sd_bus *bus_type = ipmid_get_sd_bus_connection();
	rc = mapper_get_service(bus_type, HOST_STATE_MANAGER_ROOT, &busname);
	if (rc < 0) {
		log<level::ERR>("Failed to get bus name",
				entry("ERROR=%s, OBJPATH=%s",
					strerror(-rc), HOST_STATE_MANAGER_ROOT));
		return rc;
	}

	// Convert to string equivalent of the passed in transition enum.
	auto request = State::convertForMessage(transition);

	rc = sd_bus_call_method(bus_type,                // On the system bus
							busname,                 // Service to contact
							HOST_STATE_MANAGER_ROOT, // Object path
							DBUS_PROPERTY_IFACE,     // Interface name
							"Set",                   // Method to be called
							&bus_error,              // object to return error
							nullptr,                 // Response buffer if any
							"ssv",                   // Takes 3 arguments
							HOST_STATE_MANAGER_IFACE,
							PROPERTY,
							"s", request.c_str());
	if(rc < 0)
	{
		log<level::ERR>("Failed to initiate transition",
				entry("ERROR=%s, REQUEST=%s",
					bus_error.message, request.c_str()));
	}
	else
	{
		log<level::INFO>("Transition request initiated successfully");
	}

    sd_bus_error_free(&bus_error);
    free(busname);

    return rc;
}

struct hostPowerPolicyTypeMap_t {
    uint8_t policyNum;
    char    policyName[19];
};

hostPowerPolicyTypeMap_t g_hostPowerPolicyTypeMap_t[] = {

    {0x00, "LEAVE_OFF"},
    {0x01, "RESTORE_LAST_STATE"},
    {0x02, "ALWAYS_POWER_ON"},
    {0x03, "UNKNOWN"}
};

uint8_t get_host_power_policy(char *p) {

    hostPowerPolicyTypeMap_t *s = g_hostPowerPolicyTypeMap_t;

    while (s->policyNum != 0x03) {
        if (!strcmp(s->policyName,p))
            break;
        s++;
    }

    return s->policyNum;
}

//----------------------------------------------------------------------
// Get Chassis Status commands
//----------------------------------------------------------------------
ipmi_ret_t ipmi_get_chassis_status(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                        ipmi_request_t request, ipmi_response_t response,
                        ipmi_data_len_t data_len, ipmi_context_t context)
{
    const char  *objname = "/org/openbmc/control/power0";
    const char  *intf = "org.openbmc.control.Power";

    sd_bus *bus = NULL;
    sd_bus_message *reply = NULL;
    int r = 0;
    int pgood = 0;
    char *busname = NULL;
    ipmi_ret_t rc = IPMI_CC_OK;
    ipmi_get_chassis_status_t chassis_status{};

    char *p = NULL;
    uint8_t s = 0;

    // Get the system bus where most system services are provided.
    bus = ipmid_get_sd_bus_connection();

    *data_len = 4;

    r = mapper_get_service(bus, objname, &busname);
    if (r < 0) {
        fprintf(stderr, "Failed to get bus name, return value: %s.\n", strerror(-r));
        rc = IPMI_CC_UNSPECIFIED_ERROR;
        goto finish;
    }

    r = sd_bus_get_property(bus, busname, objname, intf, "pgood", NULL, &reply, "i");
    if (r < 0) {
        fprintf(stderr, "Failed to call sd_bus_get_property:%d,  %s\n", r, strerror(-r));
        fprintf(stderr, "Bus: %s, Path: %s, Interface: %s\n",
                busname, objname, intf);
        rc = IPMI_CC_UNSPECIFIED_ERROR;
        goto finish;
    }

    r = sd_bus_message_read(reply, "i", &pgood);
    if (r < 0) {
        fprintf(stderr, "Failed to read sensor: %s\n", strerror(-r));
        rc = IPMI_CC_UNSPECIFIED_ERROR;
        goto finish;
    }

    printf("pgood is 0x%02x\n", pgood);

    // Get Power Policy
    r = dbus_get_property("power_policy",&p);

    if (r < 0) {
        fprintf(stderr, "Dbus get property(power_policy) failed for get_sys_boot_options.\n");
        rc = IPMI_CC_UNSPECIFIED_ERROR;
    } else {
        s = get_host_power_policy(p);
    }

    if (p)
    {
      free(p);
      p = NULL;
    }

    // Current Power State
    // [7] reserved
    // [6..5] power restore policy
    //          00b = chassis stays powered off after AC/mains returns
    //          01b = after AC returns, power is restored to the state that was
    //          in effect when AC/mains was lost.
    //          10b = chassis always powers up after AC/mains returns
    //          11b = unknow
    //        Set to 00b, by observing the hardware behavior.
    //        Do we need to define a dbus property to identify the restore policy?

    // [4] power control fault
    //       1b = controller attempted to turn system power on or off, but
    //       system did not enter desired state.
    //       Set to 0b, since We don't support it..

    // [3] power fault
    //       1b = fault detected in main power subsystem.
    //       set to 0b. for we don't support it.

    // [2] 1b = interlock (chassis is presently shut down because a chassis
    //       panel interlock switch is active). (IPMI 1.5)
    //       set to 0b,  for we don't support it.

    // [1] power overload
    //      1b = system shutdown because of power overload condition.
    //       set to 0b,  for we don't support it.

    // [0] power is on
    //       1b = system power is on
    //       0b = system power is off(soft-off S4/S5, or mechanical off)

    chassis_status.cur_power_state = ((s & 0x3)<<5) | (pgood & 0x1);

    // Last Power Event
    // [7..5] – reserved
    // [4] – 1b = last ‘Power is on’ state was entered via IPMI command
    // [3] – 1b = last power down caused by power fault
    // [2] – 1b = last power down caused by a power interlock being activated
    // [1] – 1b = last power down caused by a Power overload
    // [0] – 1b = AC failed
    // set to 0x0,  for we don't support these fields.

    chassis_status.last_power_event = 0;

    // Misc. Chassis State
    // [7] – reserved
    // [6] – 1b = Chassis Identify command and state info supported (Optional)
    //       0b = Chassis Identify command support unspecified via this command.
    //       (The Get Command Support command , if implemented, would still
    //       indicate support for the Chassis Identify command)
    // [5..4] – Chassis Identify State. Mandatory when bit[6] =1b, reserved (return
    //          as 00b) otherwise. Returns the present chassis identify state.
    //           Refer to the Chassis Identify command for more info.
    //         00b = chassis identify state = Off
    //         01b = chassis identify state = Temporary(timed) On
    //         10b = chassis identify state = Indefinite On
    //         11b = reserved
    // [3] – 1b = Cooling/fan fault detected
    // [2] – 1b = Drive Fault
    // [1] – 1b = Front Panel Lockout active (power off and reset via chassis
    //       push-buttons disabled.)
    // [0] – 1b = Chassis Intrusion active
    //  set to 0,  for we don't support them.
    chassis_status.misc_power_state = 0;

    //  Front Panel Button Capabilities and disable/enable status(Optional)
    //  set to 0,  for we don't support them.
    chassis_status.front_panel_button_cap_status = 0;

    // Pack the actual response
    memcpy(response, &chassis_status, *data_len);

finish:
    free(busname);
    reply = sd_bus_message_unref(reply);

    return rc;
}

//-------------------------------------------------------------
// Send a command to SoftPowerOff application to stop any timer
//-------------------------------------------------------------
int stop_soft_off_timer()
{
    constexpr auto iface            = "org.freedesktop.DBus.Properties";
    constexpr auto soft_off_iface   = "xyz.openbmc_project.Ipmi.Internal."
                                      "SoftPowerOff";

    constexpr auto property         = "ResponseReceived";
    constexpr auto value            = "xyz.openbmc_project.Ipmi.Internal."
                                      "SoftPowerOff.HostResponse.HostShutdown";
    char *busname = nullptr;

    // Get the system bus where most system services are provided.
    auto bus = ipmid_get_sd_bus_connection();

    // Get the service name
    auto r = mapper_get_service(bus, SOFTOFF_OBJPATH, &busname);
    if (r < 0) {
        fprintf(stderr, "Failed to get %s bus name: %s\n",
                SOFTOFF_OBJPATH, strerror(-r));
        return r;
    }

    // No error object or reply expected.
    int rc = sd_bus_call_method(bus, busname, SOFTOFF_OBJPATH, iface,
                           "Set", nullptr, nullptr, "ssv",
                           soft_off_iface, property, "s", value);
    if (rc < 0)
    {
        fprintf(stderr, "Failed to set property in SoftPowerOff object: %s\n",
                strerror(-rc));
    }
    free(busname);
    return rc;
}

//----------------------------------------------------------------------
// Chassis Control commands
//----------------------------------------------------------------------
ipmi_ret_t ipmi_chassis_control(ipmi_netfn_t netfn, ipmi_cmd_t cmd, 
                        ipmi_request_t request, ipmi_response_t response, 
                        ipmi_data_len_t data_len, ipmi_context_t context)
{
	// Error from power off.
	int rc = 0;

	// No response for this command.
    *data_len = 0;

	// Catch the actual operaton by peeking into request buffer
	uint8_t chassis_ctrl_cmd = *(uint8_t *)request;
	printf("Chassis Control Command: Operation:[0x%X]\n",chassis_ctrl_cmd);

	switch(chassis_ctrl_cmd)
	{
		case CMD_POWER_ON:
			rc = initiate_state_transition(State::Host::Transition::On);
			break;
		case CMD_POWER_OFF:
			// Need to Nudge SoftPowerOff application that it needs to stop the
			// watchdog timer if running.
			rc = stop_soft_off_timer();
			if (!rc)
			{
				fprintf(stderr, "Error stopping watchdog timer");
			}
			// Does not matter if we are able to stop the timer,
			// just get going and do the hard power off
			rc = initiate_state_transition(State::Host::Transition::Off);
			break;

		case CMD_HARD_RESET:
		case CMD_POWER_CYCLE:
			// SPEC has a section that says certain implementations can trigger
			// PowerOn if power is Off when a command to power cycle is
			// requested
			rc = initiate_state_transition(State::Host::Transition::Reboot);
			break;
		default:
		{
			fprintf(stderr, "Invalid Chassis Control command:[0x%X] received\n",chassis_ctrl_cmd);
			rc = -1;
		}
	}

	return ( (rc < 0) ? IPMI_CC_INVALID : IPMI_CC_OK);
}

struct bootOptionTypeMap_t {
    uint8_t ipmibootflag;
    char    dbusname[8];
};

#define INVALID_STRING "Invalid"
// dbus supports this list of boot devices.
bootOptionTypeMap_t g_bootOptionTypeMap_t[] = {

    {0x01, "Network"},
    {0x02, "Disk"},
    {0x03, "Safe"},
    {0x05, "CDROM"},
    {0x06, "Setup"},
    {0x00, "Default"},
    {0xFF, INVALID_STRING}
};

uint8_t get_ipmi_boot_option(char *p) {

    bootOptionTypeMap_t *s = g_bootOptionTypeMap_t;

    while (s->ipmibootflag != 0xFF) {
        if (!strcmp(s->dbusname,p))
            break;
        s++;
    }

    if (!s->ipmibootflag)
        printf("Failed to find Sensor Type %s\n", p);

    return s->ipmibootflag;
}

char* get_boot_option_by_ipmi(uint8_t p) {

    bootOptionTypeMap_t *s = g_bootOptionTypeMap_t;

    while (s->ipmibootflag != 0xFF) {

        if (s->ipmibootflag == p)
            break;

        s++;
    }


    if (!s->ipmibootflag)
        printf("Failed to find Sensor Type 0x%x\n", p);

    return s->dbusname;
}

ipmi_ret_t ipmi_chassis_get_sys_boot_options(ipmi_netfn_t netfn, ipmi_cmd_t cmd, 
                              ipmi_request_t request, ipmi_response_t response, 
                              ipmi_data_len_t data_len, ipmi_context_t context)
{
    ipmi_ret_t rc = IPMI_CC_PARM_NOT_SUPPORTED;
    char *p = NULL;
    get_sys_boot_options_response_t *resp = (get_sys_boot_options_response_t *) response;
    get_sys_boot_options_t *reqptr = (get_sys_boot_options_t*) request;
    uint8_t s;

    printf("IPMI GET_SYS_BOOT_OPTIONS\n");

    memset(resp,0,sizeof(*resp));
    resp->version   = SET_PARM_VERSION;
    resp->parm      = 5;
    resp->data[0]   = SET_PARM_BOOT_FLAGS_VALID_ONE_TIME;


    /*
     * Parameter #5 means boot flags. Please refer to 28.13 of ipmi doc.
     * This is the only parameter used by petitboot.
     */
    if ( reqptr->parameter == static_cast<uint8_t>
       ( BootOptionParameter::BOOT_FLAGS )) {

        *data_len = static_cast<uint8_t>(BootOptionResponseSize::BOOT_FLAGS);
        /* Get the boot device */
        int r = dbus_get_property("boot_flags",&p);

        if (r < 0) {
            fprintf(stderr, "Dbus get property(boot_flags) failed for get_sys_boot_options.\n");
            rc = IPMI_CC_UNSPECIFIED_ERROR;

        } else {

            s = get_ipmi_boot_option(p);
            resp->data[1] = (s << 2);
            rc = IPMI_CC_OK;

        }

        if (p)
        {
          free(p);
          p = NULL;
        }

        /* Get the boot policy */
        r = dbus_get_property("boot_policy",&p);

        if (r < 0) {
            fprintf(stderr, "Dbus get property(boot_policy) failed for get_sys_boot_options.\n");
            rc = IPMI_CC_UNSPECIFIED_ERROR;

        } else {

            printf("BootPolicy is[%s]", p);
            resp->data[0] = (strncmp(p,"ONETIME",strlen("ONETIME"))==0) ? 
                            SET_PARM_BOOT_FLAGS_VALID_ONE_TIME:
                            SET_PARM_BOOT_FLAGS_VALID_PERMANENT;
            rc = IPMI_CC_OK;

        }


    } else if ( reqptr->parameter == static_cast<uint8_t>
              ( BootOptionParameter::OPAL_NETWORK_SETTINGS )) {

       *data_len = static_cast<uint8_t>(BootOptionResponseSize::OPAL_NETWORK_SETTINGS);

       resp->parm = static_cast<uint8_t>(BootOptionParameter::OPAL_NETWORK_SETTINGS);

       int ret = getHostNetworkData(resp);

       if (ret < 0) {

           fprintf(stderr, "getHostNetworkData failed for get_sys_boot_options.\n");
           rc = IPMI_CC_UNSPECIFIED_ERROR;

       }else
          rc = IPMI_CC_OK;
    }

    else {
        fprintf(stderr, "Unsupported parameter 0x%x\n", reqptr->parameter);
    }

    if (p)
        free(p);

    if (rc == IPMI_CC_OK)
    {
        *data_len += 2;
    }

    return rc;
}


ipmi_ret_t ipmi_chassis_set_sys_boot_options(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                              ipmi_request_t request, ipmi_response_t response,
                              ipmi_data_len_t data_len, ipmi_context_t context)
{
    ipmi_ret_t rc = IPMI_CC_OK;
    char *s;
    set_sys_boot_options_t *reqptr = (set_sys_boot_options_t *) request;

    printf("IPMI SET_SYS_BOOT_OPTIONS reqptr->parameter =[%d]\n",reqptr->parameter);

    // This IPMI command does not have any resposne data
    *data_len = 0;

    /*  000101
     * Parameter #5 means boot flags. Please refer to 28.13 of ipmi doc.
     * This is the only parameter used by petitboot.
     */

    if (reqptr->parameter == (uint8_t)BootOptionParameter::BOOT_FLAGS) {

        s = get_boot_option_by_ipmi(((reqptr->data[1] & 0x3C) >> 2));

        printf("%d: %s\n", __LINE__, s);
        if (!strcmp(s,INVALID_STRING)) {

            rc = IPMI_CC_PARM_NOT_SUPPORTED;

        } else {

            int r = dbus_set_property("boot_flags",s);

            if (r < 0) {
                fprintf(stderr, "Dbus set property(boot_flags) failed for set_sys_boot_options.\n");
                rc = IPMI_CC_UNSPECIFIED_ERROR;
            }
        }

        /* setting the boot policy */
        s = (char *)(((reqptr->data[0] & SET_PARM_BOOT_FLAGS_PERMANENT) == 
                    SET_PARM_BOOT_FLAGS_PERMANENT) ?"PERMANENT":"ONETIME");

        printf ( "\nBoot Policy is %s",s);
        int r = dbus_set_property("boot_policy",s);

        if (r < 0) {
            fprintf(stderr, "Dbus set property(boot_policy) failed for set_sys_boot_options.\n");
            rc = IPMI_CC_UNSPECIFIED_ERROR;
        }

    } else if (reqptr->parameter == 
               (uint8_t)BootOptionParameter::OPAL_NETWORK_SETTINGS) {

        int ret = setHostNetworkData(reqptr);
        if (ret < 0) {
            fprintf(stderr, "setHostNetworkData failed for set_sys_boot_options.\n");
            rc = IPMI_CC_UNSPECIFIED_ERROR;
        }
    }
    else {
        fprintf(stderr, "Unsupported parameter 0x%x\n", reqptr->parameter);
        rc = IPMI_CC_PARM_NOT_SUPPORTED;
    }

    return rc;
}

void register_netfn_chassis_functions()
{
    // <Wildcard Command>
    printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_CHASSIS, IPMI_CMD_WILDCARD);
    ipmi_register_callback(NETFUN_CHASSIS, IPMI_CMD_WILDCARD, NULL, ipmi_chassis_wildcard,
                           PRIVILEGE_USER);

    // Get Chassis Capabilities
    printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_CHASSIS, IPMI_CMD_GET_CHASSIS_CAP);
    ipmi_register_callback(NETFUN_CHASSIS, IPMI_CMD_GET_CHASSIS_CAP, NULL, ipmi_get_chassis_cap,
                           PRIVILEGE_USER);

    // <Get System Boot Options>
    printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_CHASSIS, IPMI_CMD_GET_SYS_BOOT_OPTIONS);
    ipmi_register_callback(NETFUN_CHASSIS, IPMI_CMD_GET_SYS_BOOT_OPTIONS, NULL,
                           ipmi_chassis_get_sys_boot_options, PRIVILEGE_OPERATOR);

    // <Get Chassis Status>
    printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_CHASSIS, IPMI_CMD_CHASSIS_STATUS);
    ipmi_register_callback(NETFUN_CHASSIS, IPMI_CMD_CHASSIS_STATUS, NULL, ipmi_get_chassis_status,
                           PRIVILEGE_USER);

    // <Chassis Control>
    printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_CHASSIS, IPMI_CMD_CHASSIS_CONTROL);
    ipmi_register_callback(NETFUN_CHASSIS, IPMI_CMD_CHASSIS_CONTROL, NULL, ipmi_chassis_control,
                           PRIVILEGE_OPERATOR);

    // <Set System Boot Options>
    printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n", NETFUN_CHASSIS, IPMI_CMD_SET_SYS_BOOT_OPTIONS);
    ipmi_register_callback(NETFUN_CHASSIS, IPMI_CMD_SET_SYS_BOOT_OPTIONS, NULL,
                           ipmi_chassis_set_sys_boot_options, PRIVILEGE_OPERATOR);
}