#!/bin/bash
str_dir_name=`dirname $0`

. $str_dir_name/xcatlib.sh

#tranfer the netmask to prefix for ipv4
function v4mask2prefix(){
    local num_bits=0
    local old_ifs=$IFS
    IFS=$'.'
    local array_num_temp=($1)
    IFS=$old_ifs
    for num_dec in ${array_num_temp[@]}
    do
        case $num_dec in
            255) let num_bits+=8;;
            254) let num_bits+=7;;
            253) let num_bits+=6;; 
            248) let num_bits+=5;;
            240) let num_bits+=4;;
            224) let num_bits+=3;;
            192) let num_bits+=2;;
            128) let num_bits+=1;;
            0) ;;
            *) echo "Error: $dec is not recognised"; exit 1
        esac
    done
    echo "$num_bits"
}

function configipv4(){
    str_if_name=$1
    str_v4ip=$2
    str_v4net=$3
    str_v4mask=$4
    num_v4num=$5
    
    if [ "$str_os_type" = "sles" ];then
        str_conf_file="/etc/sysconfig/network/ifcfg-${str_if_name}"
        if [ $num_v4num -eq 0 ];then
            echo "DEVICE=${str_if_name}" > $str_conf_file
            echo "BOOTPROTO=static" >> $str_conf_file
            echo "BROADCAST=" >> $str_conf_file
            echo "ETHTOOL_OPTIONS=" >> $str_conf_file
            echo "IPADDR=${str_v4ip}" >> $str_conf_file
            echo "MTU=" >> $str_conf_file
            echo "NAME=" >> $str_conf_file
            echo "NETMASK=${str_v4mask}" >> $str_conf_file
            echo "NETWORK=${str_v4net}" >> $str_conf_file
            echo "REMOTE_IPADDR=" >> $str_conf_file
            echo "STARTMODE=onboot" >> $str_conf_file
            echo "UNIQUE=" >> $str_conf_file
            echo "USERCONTROL=no" >> $str_conf_file
            echo "_nm_name=static-0" >> $str_conf_file
        else
            echo "IPADDR_${num_v4num}=${str_v4ip}" >> $str_conf_file
            echo "NETMASK_${num_v4num}=${str_v4mask}" >> $str_conf_file
            echo "NETWORK_${num_v4num}=${str_v4net}" >> $str_conf_file
            echo "LABEL_${num_v4num}=${num_v4num}" >> $str_conf_file
        fi
    #debian ubuntu
    elif [ "$str_os_type" = "debian" ];then
        str_conf_file="/etc/network/interfaces.d/${str_if_name}"
        if [ $num_v4num -eq 0 ];then
            echo "auto ${str_if_name}" > $str_conf_file
            echo "iface ${str_if_name} inet static" >> $str_conf_file
        else
            echo "auto ${str_if_name}:${num_v4num}" >> $str_conf_file
            echo "iface ${str_if_name}:${num_v4num} inet static" >> $str_conf_file
        fi
        echo "  address ${str_v4ip}" >> $str_conf_file
        echo "  netmask ${str_v4mask}" >> $str_conf_file
        echo "  network ${str_v4net}" >> $str_conf_file
    else
        # Write the info to the ifcfg file for redhat
        str_conf_file=""
        if [ $num_v4num -eq 0 ];then
            str_conf_file="/etc/sysconfig/network-scripts/ifcfg-${str_if_name}"
            echo "DEVICE=${str_if_name}" > $str_conf_file
        else
            str_conf_file="/etc/sysconfig/network-scripts/ifcfg-${str_if_name}:${num_v4num}"
            echo "DEVICE=${str_if_name}:${num_v4num}" > $str_conf_file
        fi

        echo "BOOTPROTO=none" >> $str_conf_file
        echo "NM_CONTROLLED=no" >> $str_conf_file
        echo "IPADDR=${str_v4ip}" >> $str_conf_file
        echo "NETMASK=${str_v4mask}" >> $str_conf_file
        echo "ONBOOT=yes" >> $str_conf_file
    fi
}

configipv6(){
    str_if_name=$1
    str_v6ip=$2
    str_v6net=$3
    str_v6prefix=$4
    num_v6num=$5
    num_v4num=$6
    str_v6gateway=$7

    #remove the prefix length from the subnet
    str_v6net=`echo $str_v6net | cut -d"/" -f 1`

    #remove the "/" from mask
    str_v6prefix=`echo $str_v6prefix | sed 's/\///'`

    if [ "$str_os_type" = "sles" ];then
        str_conf_file="/etc/sysconfig/network/ifcfg-${str_if_name}"
        if [ $num_v4num -eq 0 -a $num_v6num -eq 0 ];then
            echo "DEVICE=$str_if_name" > $str_conf_file
            echo "BOOTPROTO=static" >> $str_conf_file
            echo "NM_CONTROLLED=no" >> $str_conf_file
            echo "STARTMODE=onboot" >> $str_conf_file
        fi
        echo "LABEL_ipv6${num_v6num}=ipv6$num_v6num" >> $str_conf_file
        echo "IPADDR_ipv6${num_v6num}=${str_v6ip}" >> $str_conf_file
        echo "PREFIXLEN_ipv6${num_v6num}=${str_v6prefix}" >> $str_conf_file
        if [ `echo $str_v6gateway | grep -v 'xcatmaster'` ];then
            grep -E "default[:space:]+${str_v6gateway}[:space:]+" /etc/sysconfig/network/routes 2>&1 1>/dev/null
            if [ $? -ne 0 ];then
                echo "default $str_v6gateway - -" >> /etc/sysconfig/network/routes
            fi
        fi 
    elif [ "$str_os_type" = "debian" ];then
        #debian or ubuntu
        str_conf_file="/etc/network/interfaces.d/${str_if_name}"
        if [ $num_v4num -eq 0 -a $num_v6num -eq 0 ];then
            echo "auto ${str_if_name}" > $str_conf_file
        fi
        if [ $num_v6num -eq 0 ];then
            echo "pre-up modprobe ipv6" >> $str_conf_file
            echo "iface ${str_if_name} inet6 static" >> $str_conf_file
            echo "  address ${str_v6ip}" >> $str_conf_file
            echo "  netmask ${str_v6prefix}" >> $str_conf_file
            if [ $str_v6gateway ];then
                echo "  gateway ${str_v6gateway}" >> $str_conf_file
            fi
        else
            echo "  post-up /sbin/ifconfig ${str_if_name} inet6 add ${str_v6ip}/${str_v6prefix}" >> $str_conf_file
            echo "  pre-down /sbin/ifconfig ${str_if_name} inet6 del ${str_v6ip}/${str_v6prefix}" >> $str_conf_file
        fi
    else
        #redhat
        str_conf_file="/etc/sysconfig/network-scripts/ifcfg-${str_if_name}"
        if [ $num_v4num -eq 0 -a $num_v6num -eq 0 ];then
            echo "DEVICE=$str_if_name" > $str_conf_file
            echo "BOOTPROTO=none" >> $str_conf_file
            echo "NM_CONTROLLED=no" >> $str_conf_file
            echo "ONBOOT=yes" >> $str_conf_file
        fi
        if [ $num_v6num -eq 0 ];then
            echo "IPV6INIT=yes" >> $str_conf_file
            echo "IPV6ADDR=${str_v6ip}/${str_v6prefix}" >> $str_conf_file
        else
            echo "IPV6ADDR_SECONDARIES=${str_v6ip}/${str_v6prefix}" >> $str_conf_file
        fi
        if [ `echo $str_v6gateway | grep -v 'xcatmaster'` ];then
            echo "IPV6_DEFAULTGW=$str_v6gateway" >> $str_conf_file
        fi
    fi
}

#delete all configuration file(s) on linux
function delete_nic_config_files(){
    str_temp_name=$1
    #delete the configuration files
    #delete the configuration history
    if [ "$str_os_type" = "debian" ];then
        rm -f /etc/network/interfaces.d/$str_temp_name 2>/dev/null
        sed -i "/${str_temp_name}/d" /etc/network/xcat_history_important
    elif [ "$str_os_type" = "sles" ];then
        rm -f /etc/sysconfig/network/ifcfg-${str_temp_name} 2>/dev/null
        sed -i "/${str_temp_name}/d" /etc/sysconfig/network/xcat_history_important
    else
        rm -f /etc/sysconfig/network-scripts/ifcfg-${str_temp_name} 2>/dev/null
        rm -f /etc/sysconfig/network-scripts/ifcfg-${str_temp_name}:* 2>/dev/null
        sed -i "/${str_temp_name}/d" /etc/sysconfig/network-scripts/xcat_history_important
    fi
}

function add_ip_temporary(){
    local str_ip_prefix=$1
    local str_temp_name=$2
    local str_ip=`echo $str_ip_prefix | awk -F'_' '{print $1}'`
    local str_mask=`echo $str_ip_prefix | awk -F'_' '{print $2}'`

    if [ "$str_os_type" = "aix" ];then
        echo $str_ip | grep ":" > /dev/null
        #ipv6
        if [ $? -eq 0 ];then
            lsattr -El $str_temp_name | grep netaddr6 | awk '{print $2}' | grep ":"
            if [ $? -ne 0 ];then
                chdev -l $str_temp_name -a netaddr6=$str_ip -a prefixlen=$str_mask
            else
                chdev -l $str_temp_name -a alias6=${str_ip}/${str_mask}
            fi
        #ipv4
        else
            lsattr -El $str_temp_name | grep netaddr | awk '{print $2}' | grep '\.'
            if [ $? -ne 0 ];then
                chdev -l $str_temp_name -a netaddr=${str_ip} -a netmask=${str_mask}
            else
                chdev -l $str_temp_name -a alias4=${str_ip},${str_mask}
            fi
        fi
    else
        echo $str_ip | grep ":" > /dev/null
        #ipv6
        if [ $? = 0 ];then
            lsmod |grep -w 'ipv6'
            if [ $? -ne 0 ];then
                modprobe ipv6
            fi
            ip addr add ${str_ip}/${str_mask} dev $str_temp_name
        #ipv4
        else 
            str_label=''
            ip addr show dev $str_temp_name | grep inet | grep "global" | grep -v ':' | grep "${str_temp_name}"
            if [ $? -eq 0 ];then
                for num_i in {1..1000}
                do
                    ip addr show dev $str_temp_name | grep inet | grep "global" | grep ":${num_i}"
                    if [ $? -ne 0 ];then
                        str_label=${str_nic_name}:${num_i}
                        break
                    fi
                done
            else
                str_label=$str_nic_name
            fi

            #the label is ready, add the ip address directly
            ip addr add $str_ip/${str_mask} dev $str_nic_name scope global label $str_label
        fi
    fi
}

str_nic_name=''
str_os_type=`uname | tr 'A-Z' 'a-z'`
str_cfg_dir=''
str_temp=''
if [ "$str_os_type" = "linux" ];then
    str_temp=`echo $OSVER | grep -E '(sles|suse)'`
    if [ -f "/etc/debian_version" ];then
        debianpreconf
        str_os_type="debian"
        str_cfg_dir="/etc/network/"
    elif [ -f "/etc/SuSE-release" -o -n "$str_temp" ];then
        str_os_type="sles"
        str_cfg_dir="/etc/sysconfig/network/"
    else
        str_os_type="redhat"
        str_cfg_dir="/etc/sysconfig/network-scripts/"
    fi
fi

logger -t xcat -p local4.err "configeth: os type: $str_os_type"
echo "configeth on $NODE: os type: $str_os_type"
if [ "$1" = "-r" ];then
    if [ $# -ne 2 ];then
        logger -t xcat -p local4.err "configeth: remove nic, but the nic name is missed"
        echo "configeth on $NODE: remove nic, but the nic name is missed"
        exit 1
    fi
    str_nic_name=$2
    logger -t xcat -p local4.err "configeth: remove nic $str_nic_name"
    echo "configeth on $NODE: remove nic $str_nic_name"

    if [ "$str_os_type" = "aix" ];then
        old_ifs=$IFS
        IFS=$'\n'
        str_temp=`lsattr -El $str_nic_name | grep alias4 | awk '{print $2}'`
        array_alias4_temp=($str_temp)
        IFS=$old_ifs
        for str_ip_alias4 in $str_temp
        do
            #the alias format should be ipaddr,netmask
            echo $str_ip_alias4 | grep -E ,
            if [ $? -eq 0 ];then
                chdev -l $str_nic_name -a delalias4=$str_ip_alias4
            fi
        done
        str_temp=`lsattr -El $str_nic_name | grep alias6 | awk '{print $2}'`
        old_ifs=$IFS
        IFS=$'\n'
        array_alias6_temp=($str_temp)
        IFS=$old_ifs
        for str_ip_alias6 in ${array_alias6_temp[@]}
        do
            echo $str_ip_alias6 | grep -E /
            if [ $? -eq 0 ];then
                chdev -l $str_nic_name -a delalias6=$str_ip_alias6
            fi
        done
        logger -t xcat -p local4.err "configeth run command: chdev -l $str_nic_name -a netaddr='' -a netmask='' -a netaddr6='' -a prefixlen='' -a state=down"
        echo "configeth on $NODE run command: chdev -l $str_nic_name -a netaddr='' -a netmask='' -a netaddr6='' -a prefixlen='' -a state=down"
        chdev -l $str_nic_name -a netaddr='' -a netmask='' -a netaddr6='' -a prefixlen='' -a state=down
    else
        #shut down the nic if it is on 
        ip link show $str_nic_name | grep -i ',up'
        if [ $? -eq 0 ];then
            if [ "$str_os_type" = "debian" ];then
                ifdown --force $str_nic_name
            else
                ifdown $str_nic_name
            fi
        fi

        #delete the configuration files
        delete_nic_config_files $str_nic_name
    fi
    exit 0
fi

#main prcess
#1. get all ip,netmask,subnet,gateway for the nic
#2. get current configurations
#3. delete the undefined ips
#4. add the new defined ips
#5. no modification, return directly
#3. on linux modify the configuration files
if [ $# -ne 3 ];then
    logger -t xcat -p local4.err "configeth: paramters error currently is $@"
    echo "configeth on $NODE: paramters error currently is $@"
    exit 1
fi
str_nic_name=$1
old_ifs=$IFS
IFS=$'|'
array_nic_ips=($2)
array_nic_networks=($3)
IFS=$old_ifs

if [ "$str_os_type" = "aix" ];then
    str_temp=`lsattr -El $str_nic_name`
else
    str_temp=`ip addr show dev $str_nic_name`
fi

logger -t xcat -p local4.err "configeth: old configuration: $str_temp"
echo "configeth on $NODE: old configuration: $str_temp"

#parse the networks tables contains
declare -a array_ip_mask
declare -a array_ip_status
declare -a array_nic_network_config
declare -a array_nic_subnet
declare -a array_nic_netmask
declare -a array_nic_gateway

str_ip_mask_pair=''
num_index=1
while [ $num_index -le $NETWORKS_LINES ];do
    eval str_temp=\$NETWORKS_LINE$num_index
    str_temp_name=`echo $str_temp | awk -F'netname=' '{print $2}' | awk -F'|' '{print $1}'`
    num_i=0
    while [ $num_i -lt ${#array_nic_ips[*]} ]
    do
        if [ "$str_temp_name" = "${array_nic_networks[$num_i]}" ];then
            array_nic_network_config[$num_i]=$str_temp
            break
        fi
        num_i=$((num_i+1))
    done
    num_index=$((num_index+1))
done

logger -t xcat -p local4.err "configeth: new configuration"
echo "configeth on $NODE: new configuration"
num_index=0
str_ipv6_gateway=''
while [ $num_index -lt ${#array_nic_ips[*]} ];do
    #get the ip address and network name
    str_ip=${array_nic_ips[$num_index]}
    str_netname=${array_nic_networks[$num_index]}
    if [ ! $str_netname ];then
        logger -t xcat -p local4.err "configeth: Network name is not defined on $str_nic_name for $str_ip."
        echo "configeth on $NODE: Network name is not defined on $str_nic_name for $str_ip."
        num_index=$((num_index+1))
        continue
    fi

    #find out the network definition 
    str_line=${array_nic_network_config[$num_index]}
    if [ ! $str_line ];then
        logger -t xcat -p local4.err "configeth: Network object $str_netname is not defined."
        echo "configeth on $NODE: Network object $str_netname is not defined."
        num_index=$((num_index+1))
        continue
    fi

    #fetch the subnet and netmask in networks definition
    str_subnet=`echo $str_line | awk -F'net=' '{print $2}' | awk -F'|' '{print $1}'`
    str_netmask=`echo $str_line | awk -F'mask=' '{print $2}' | awk -F'|' '{print $1}'`
    str_gateway=`echo $str_line | awk -F'gateway=' '{print $2}' | awk -F'|' '{print $1}'`
    
    if [ ! $str_subnet -o ! $str_netmask ];then
        logger -t xcat -p local4.err "configeth: subnet or netmask is not defined in network object $str_netname."
        echo "configeth on $NODE: subnet or netmask is not defined in network object $str_netname."
        num_index=$((num_index+1))
        continue
    fi

    array_nic_subnet[$num_index]=$str_subnet
    array_nic_netmask[$num_index]=$str_netmask
    array_nic_gateway[$num_index]=$str_gateway
    if [ -n "$str_gateway" ];then
        str_ipv6_gateway=$str_gateway
    fi
    logger -t xcat -p local4.err "configeth: $str_ip, $str_subnet, $str_netmask, $str_gateway"
    echo "       $str_ip, $str_subnet, $str_netmask, $str_gateway"
    #on linux, call sub rutine to define ipv4 or ipv6 address for the persitent configuration
    if [ `echo $str_ip | grep -E '^([0-9]{1,3}\.){3}[0-9]{1,3}$'` ];then
        if [ "$str_os_type" = "aix" ];then
            hashset hash_new_config "${str_ip}_${str_netmask}" "new"
            str_ip_mask_pair=$str_ip_mask_pair"${str_ip}_${str_netmask} "
        else
            str_prefix=$(v4mask2prefix $str_netmask)
            hashset hash_new_config "${str_ip}_${str_prefix}" "new"
            str_ip_mask_pair=$str_ip_mask_pair"${str_ip}_${str_prefix} "
        fi
    elif [ `echo $str_ip | grep -E ":"` ];then
        num_ipv6_index=$((num_ipv6_index+1))
        hashset hash_new_config "${str_ip}_${str_netmask}" "new"
        str_ip_mask_pair=$str_ip_mask_pair"${str_ip}_${str_netmask} "
    else
        logger -t xcat -p local4.err "configeth: the ipaddress( $str_ip ) for $str_nic_name is invalid."
        echo "configeth on $NODE: the ipaddress( $str_ip ) for $str_nic_name is invalid."
    fi
    num_index=$((num_index+1))
done

str_ip_mask_pair=`echo "$str_ip_mask_pair" | sed -e 's/ $//'`

str_old_conf=''
if [ "$str_os_type" = "aix" ];then
    #check the netaddr
    str_history=`lsattr -El $str_nic_name | grep netaddr | awk '{print $2}' | grep '\.'`
    if [ $? -eq 0 ];then
        str_temp=`lsattr -El $str_nic_name | grep netmask | awk '{print $2}'`
        str_old_ip=${str_history}"_"${str_temp}
        str_ip_status=$(hashget hash_new_config $str_old_ip)
        if [ -n "$str_ip_status" ];then
            hashset hash_new_config $str_old_ip "old"
        else
            chdev -l $str_nic_name -a netaddr='' -a netmask=''
            logger -t xcat -p local4.err "configeth: delete undefined ip address $str_old_ip"
            echo "configeth on $NODE: delete undefined ip address $str_old_ip"
        fi
    fi

    #check the netaddr6
    str_history=`lsattr -El $str_nic_name | grep netaddr6 | awk '{print $2}' | grep ':'`
    if [ $? -eq 0 ];then
        str_temp=`lsattr -El $str_nic_name | grep prefixlen | awk '{print $2}'`
        str_old_ip=${str_history}"_"${str_temp}
        str_ip_status=$(hashget hash_new_config $str_old_ip)
        if [ -n "$str_ip_status" ];then
            hashset hash_new_config $str_old_ip "old"
        else
            chdev -l $str_nic_name -a netaddr6='' -a prefixlen=''
            logger -t xcat -p local4.err "configeth: delete undefined ipv6 address $str_old_ip"
            echo "configeth on $NODE: delete undefined ipv6 address $str_old_ip"
        fi
    fi
    
    #check the ipv4 alias
    str_history=`lsattr -El $str_nic_name | grep alias4 | awk '{print $2}' | grep '\.'`
    if [ $? -eq 0 ];then
        old_ifs=$IFS
        IFS=$'\n'
        array_alias4_temp=($str_history)
        IFS=$old_ifs
        for str_temp in ${array_alias4_temp[@]}
        do
            str_old_ip=`echo $str_temp | tr ',' '_'`
            str_ip_staus=$(hashget hash_new_config $str_old_ip)
            if [ -n "$str_ip_staus" ];then
                hashset hash_new_config $str_old_ip "old"
            else
                chdev -l $str_nic_name -a delalias4=$str_temp
                
            fi
        done
    fi

    #check the ipv6 alias
    str_history=`lsattr -El $str_nic_name | grep alias6 | awk '{print $2}' | grep '\.'`
    if [ $? -eq 0 ];then
        old_ifs=$IFS
        IFS=$'\n'
        array_alias6_temp=($str_history)
        IFS=$old_ifs
        for str_temp in ${array_alias6_temp[@]}
        do
            str_old_ip=`$str_temp | tr '/' '_'`
            str_ip_staus=$(hashget hash_new_config $str_old_ip)
            if [ -n "$str_ip_staus" ];then
                hashset hash_new_config $str_old_ip "old"
            else
                chdev -l $str_nic_name -a delalias6=$str_temp
            fi
        done
    fi

    #add the new configured ip address
    old_ifs=$IFS
    IFS=$' '
    array_ip_mask_temp=($str_ip_mask_pair)
    IFS=$old_ifs
    for str_new_ip in ${array_ip_mask_temp[@]}
    do
        str_ip_status=$(hashget hash_new_config $str_new_ip)
        if [ "$str_ip_status" = "new" ];then
            logger -t xcat -p local4.err "configeth: add $str_new_ip for $str_nic_name temporary."
            echo "configeth on $NODE: add $str_new_ip for $str_nic_name temporary."
            add_ip_temporary $str_new_ip $str_nic_name
        fi
    done
    
    #change the nic status to up
    chdev -l $str_nic_name -a state=up
else
    str_history=''
    bool_restart_flag=0
    bool_modify_flag=0
    str_nic_status='down'
    str_his_file=${str_cfg_dir}xcat_history_important

    str_history=`ip addr show dev $str_nic_name | grep inet | grep -iv dynamic | grep -iv link | awk '{print $2}'`
    old_ifs=$IFS
    IFS=$'\n'
    array_ip_old_temp=($str_history)
    IFS=$old_ifs
    ip link show dev $str_nic_name | grep -i ,up
    if [ $? -eq 0 ];then
        str_nic_status='up'
        if [ -f "${str_his_file}" ];then
            cat ${str_his_file} | grep $str_nic_name
            if [ $? -eq 0 ];then
                str_nic_status='up'
                for str_old_ip in ${array_ip_old_temp[@]}
                do
                    str_old_ip=`echo $str_old_ip | tr '/' '_'`
                    str_ip_staus=$(hashget hash_new_config $str_old_ip)
                    if [ -n "$str_ip_staus" ];then
                        hashset hash_new_config $str_old_ip "old"
                    else
                        bool_modify_flag=1
                        logger -t xcat -p local4.err "configeth: delete $str_old_ip for $str_nic_name temporary."
                        echo "configeth on $NODE: delete $str_old_ip for $str_nic_name temporary."
                        str_old_ip=`echo $str_old_ip | tr '_' '/'`
                        ip addr del $str_old_ip dev $str_nic_name
                    fi
                done
            else
                bool_restart_flag=1
                bool_modify_flag=1
            fi
        else
            bool_restart_flag=1
            bool_modify_flag=1
        fi
    else
        bool_restart_flag=1
        bool_modify_flag=1
    fi

    if [ $bool_restart_flag = 0 ];then
        #add the new defined ip
        old_ifs=$IFS
        IFS=$' '
        array_ip_mask_temp=($str_ip_mask_pair)
        IFS=$old_ifs
        for str_new_ip in ${array_ip_mask_temp[@]}
        do
            str_ip_status=$(hashget hash_new_config $str_new_ip)
            if [ "$str_ip_status" = "new" ];then
                bool_modify_flag=1
                if [ $bool_restart_flag -eq 0 ];then
                    logger -t xcat -p local4.err "configeth: add $str_new_ip for $str_nic_name temporary."
                    echo "configeth on $NODE: add $str_new_ip for $str_nic_name temporary."
                    add_ip_temporary $str_new_ip $str_nic_name
                fi
            fi
        done
    fi
    #configure the ipv6 default route
    if [ $bool_restart_flag -eq 0 -a -n "$str_ipv6_gateway" ];then
        ip -6 route | grep default | grep $str_ipv6_gateway
        if [ $? -ne 0 ];then
            logger -t xcat -p local4.err "configeth: the default ipv6 route changes to $str_ipv6_gateway."
            echo "configeth on $NODE: the default ipv6 route changes to $str_ipv6_gateway."
            ip -6 route del default
            ip -6 route add default $str_ipv6_gateway dev $str_dev_name
        fi
    fi

    #modify the configuration files
    if [ $bool_modify_flag -eq 1 ];then
        if [ $bool_restart_flag -eq 1 ];then
            if [ "$str_nic_status" = "up" ];then
                if [ "$str_os_type" = "debian" ];then
                    ifdown --force $str_nic_name > /dev/null
                else
                    ifdown $str_nic_name > /dev/null
                fi
            fi
            #delete all old ip address
            for str_old_ip in ${array_ip_old_temp[@]}
            do
                ip addr del $str_old_ip dev $str_nic_name
            done
        fi
        logger -t xcat -p local4.err "configeth: $str_nic_name changed, modify the configuration files"
        echo "configeth on $NODE: $str_nic_name changed, modify the configuration files"
        num_ipv4_index=0
        num_ipv6_index=0
        num_index=0
        cat $str_his_file | grep $str_nic_name
        if [ $? -ne 0 ];then
            echo "${str_nic_name}" >> $str_his_file
        fi
        #delete the old alias configuration files on redhat
        if [ "$str_os_type" = "redhat" ];then
            rm -f /etc/sysconfig/network-scripts/ifcfg-${str_nic_name}:* 2>/dev/null
        fi
        while [ $num_index -lt ${#array_nic_ips[*]} ];do
            str_ip=${array_nic_ips[$num_index]}
            str_subnet=${array_nic_subnet[$num_index]}
            str_netmask=${array_nic_netmask[$num_index]}
            str_gateway=${array_nic_gateway[$num_index]}
            if [ ! $str_subnet -o ! $str_netmask ];then
                num_index=$((num_index+1))
                continue
            fi

            if [ `echo $str_ip | grep -E '^([0-9]{1,3}\.){3}[0-9]{1,3}$'` ];then
                configipv4 $str_nic_name $str_ip $str_subnet $str_netmask $num_ipv4_index
                num_ipv4_index=$((num_ipv4_index+1))
            elif [ `echo $str_ip | grep -E ":"` ];then
                configipv6 $str_nic_name $str_ip $str_subnet $str_netmask $num_ipv6_index $num_ipv4_index $str_gateway
                num_ipv6_index=$((num_ipv6_index+1))
            else
                num_index=$((num_index+1))
                continue
            fi
            num_index=$((num_index+1))
        done
    else
        logger -t xcat -p local4.err "configeth: $str_nic_name no changed, return directly."
        echo "configeth on $NODE: $str_nic_name no changed, return directly."
    fi

    #restart the nic
    if [ $bool_restart_flag -eq 1 ];then
        if [ "$str_os_type" = "debian" ];then
            ifup -a -i /etc/network/interfaces.d/$str_nic_name
        else
            ifup $str_nic_name
        fi
    fi
fi

exit 0