#!/bin/bash
#BMC set time from host
set -e

echo "set-bmc-time-from-host is started"
# Sync BMC's date with one of the four servers

HOST_INSTANCES="HOST_INSTANCES_SED_REPLACEMENT_VALUE"
MAX_RETRY_LIMIT=6

check_NTP_status()
{
  timedatectl show --property=NTPSynchronized --value
}

get_single_host_time()
{
    for (( retry=1; retry<=5; retry++ ))
    do
        #request the single host time via ipmb command
        # which will be set as bmc time
        # 0x01 - me channel | 0x0a - storage net fn | 0x00 - lun
        # 0x48 - get SEL time
        ipmi_cmd_output=$(busctl call xyz.openbmc_project.Ipmi.Channel.Ipmb \
        "/xyz/openbmc_project/Ipmi/Channel/Ipmb" org.openbmc.Ipmb sendRequest \
        yyyyay 0x01 0x0a 0x00 0x48 0)
        ipmb_result=$?
        if [ "$ipmb_result" == "0" ];then
            sleep 1
            break
        fi
    done

    if [ "$retry" == "$MAX_RETRY_LIMIT" ];then
        exit 1
    fi

    echo "$ipmi_cmd_output"

}

get_multi_host_datetime()
{
    ipmbAddr=$1
    for (( retry=1; retry<=5; retry++ ))
    do
        #request the multihost host time via ipmb command
        # which will be set as bmc time
        # 0x38 - oem net fn | 0x00 - lun | 0x02 - request to bridge ic cmd
        # 0x6 - length | IANA id 0x15 0xA0 0x0 |0x48 - get SEL time

        ipmi_cmd_output=$(busctl call xyz.openbmc_project.Ipmi.Channel.Ipmb \
        /xyz/openbmc_project/Ipmi/Channel/Ipmb org.openbmc.Ipmb sendRequest \
         yyyyay "$ipmbAddr" 0x38 0 0x2 6 0x15 0xA0 0x0 0x1 0x28 0x48)
        ipmb_result=$?
        if [ $ipmb_result == 0 ];then
            break
        fi
        sleep 1
    done

    echo "$ipmi_cmd_output"
}
sync_multi_host_datetime()
{
    for index in $HOST_INSTANCES
    do
        ipmb_addr=$(((index-1)*4))
        # Use standard IPMI command 'SendRequest method' to read RTC time
        echo "chosen ipmb addr : "$ipmb_addr
        multi_host_time_result=$(get_multi_host_datetime $ipmb_addr)

        if [[ $(echo "$multi_host_time_result" | awk '{ print NF }') -eq 18 ]];
        then
            echo "syncing up host " "$index" " date time with bmc..."
            date -s @$((0x$(echo "$multi_host_time_result" | \
            awk '{printf "%02x%02x%02x%02x",$18,$17,$16,$15}')))
            sync
            break
        fi
    done

}
sync_single_host_datetime()
{
    single_host_time_result=$(get_single_host_time)

    if [[ $(echo "$single_host_time_result" | awk '{ print NF }') -eq 11 ]];
    then
        echo "Syncing up host date time with bmc..."
        date -s @$((0x$(echo "$single_host_time_result" | \
        awk '{printf "%02x%02x%02x%02x",$11,$10,$9,$8}')))
        sync
    fi

}

#wait for the NTP server start if available.
sleep 60

NTP_STATUS=$(check_NTP_status)

echo "NTP status :""$NTP_STATUS"

if [ "$NTP_STATUS" == "yes" ]; then
    echo "NTP is running and system clock is in sync.skiping host time sync..."
    exit 0
fi

if [ "$HOST_INSTANCES" == "0" ]; then
    echo "single host instance"
    sync_single_host_datetime
else
    echo "multiple host instance"
    sync_multi_host_datetime
fi