source: projects/initscripts/tags/initscripts-8.91.0/sysconfig/network-scripts/network-functions @ 2576

# -*-Shell-script-*-
#
# This file is not a stand-alone shell script; it provides functions 
# to network scripts that source it.

# Set up a default search path.
PATH="/sbin:/usr/sbin:/bin:/usr/bin"
export PATH

[ -z "$__sed_discard_ignored_files" ] && . /etc/init.d/functions

get_hwaddr ()
{
    if [ -f /sys/class/net/${1}/address ]; then
        awk '{ print toupper($0) }' < /sys/class/net/${1}/address
    elif [ -d "/sys/class/net/${1}" ]; then
        LC_ALL= LANG= ip -o link show ${1} 2>/dev/null | \
            awk '{ print toupper(gensub(/.*link\/[^ ]* ([[:alnum:]:]*).*/,
                                        "\\1", 1)); }'
    fi
}

get_config_by_hwaddr ()
{
    LANG=C grep -il "^[[:space:]]*HWADDR=${1}\([[:space:]#]\|$\)" /etc/sysconfig/network-scripts/ifcfg-* \
        | LC_ALL=C sed -e "$__sed_discard_ignored_files"
}

get_config_by_subchannel ()
{
    LANG=C grep -il "^[[:space:]]*SUBCHANNELS=${1}\([[:space:]#]\|$\|,\)" /etc/sysconfig/network-scripts/ifcfg-* \
        | LC_ALL=C sed -e "$__sed_discard_ignored_files"
}

get_device_by_hwaddr ()
{
    LANG=C ip -o link | grep -v link/ieee802.11 | awk -F ': ' -vIGNORECASE=1 "/$1/ { print \$2 }"
}

need_config ()
{
    local nconfig

    CONFIG="ifcfg-${1}"
    [ -f "${CONFIG}" ] && return
    CONFIG="${1}"
    [ -f "${CONFIG}" ] && return
    local addr=`get_hwaddr ${1}`
    if [ -n "$addr" ]; then
      nconfig=`get_config_by_hwaddr ${addr}`
      if [ -n "$nconfig" ] ; then
        CONFIG=${nconfig##*/}
        [ -f "${CONFIG}" ] && return
      fi
    fi
    nconfig=$(LANG=C grep -l "^[[:space:]]*DEVICE=${1}\([[:space:]#]\|$\)" \
        /etc/sysconfig/network-scripts/ifcfg-* \
        | LC_ALL=C sed -e "$__sed_discard_ignored_files")
    if [ -n "$nconfig" -a -f "$nconfig" ]; then
      CONFIG=${nconfig##*/}
      return
    fi
}

source_config ()
{
    DEVNAME=`basename $CONFIG | sed 's/^ifcfg-//g'`
    if echo ${CONFIG##*/} | grep -q '[^g]-' ; then
        PARENTCONFIG=`echo $CONFIG | sed 's/-[^-]*$//g'`
        PARENTDEVNAME=${PARENTCONFIG##*/ifcfg-}
        [ -f $PARENTCONFIG ] || {
            echo $"Missing config file $PARENTCONFIG." >&2
            exit 1
        }
        . /etc/sysconfig/network-scripts/${PARENTCONFIG##*/}
        [ -r "/etc/sysconfig/network-scripts/keys-$PARENTDEVNAME" ] && . /etc/sysconfig/network-scripts/keys-$PARENTDEVNAME
    fi
    . /etc/sysconfig/network-scripts/${CONFIG##*/}
    [ -r "/etc/sysconfig/network-scripts/keys-$DEVNAME" ] && . /etc/sysconfig/network-scripts/keys-$DEVNAME
    case "$TYPE" in
        Ethernet)
                DEVICETYPE="eth"
                ;;
        CIPE)
                DEVICETYPE="cipcb"
                ;;
        IPSEC)
                DEVICETYPE="ipsec"
                ;;
        Modem)
                DEVICETYPE="ppp"
                ;;
        xDSL)
                DEVICETYPE="ppp"
                ;;
        ISDN)
                DEVICETYPE="ippp"
                ;;
        Wireless)
                DEVICETYPE="eth"
                ;;
        "Token Ring")
                DEVICETYPE="eth"
                ;;
        CTC)
                DEVICETYPE="ctc"
                ;;
        IUCV)
                DEVICETYPE="iucv"
                ;;
        GRE | IPIP)
                DEVICETYPE="tunnel"
                ;;
        SIT | sit)
                DEVICETYPE="sit"
                ;;
    esac
    [ -z "$DEVICETYPE" ] && DEVICETYPE=`echo ${DEVICE} | sed "s/[0-9]*$//"`
    [ -z "$REALDEVICE" -a -n "$PARENTDEVICE" ] && REALDEVICE=$PARENTDEVICE
    [ -z "$REALDEVICE" ] && REALDEVICE=${DEVICE%%:*}
    if [ "${DEVICE}" != "${REALDEVICE}" ]; then
        ISALIAS=yes
    else
        ISALIAS=no
    fi
    if [ -n "$HWADDR" ]; then
        HWADDR=`echo $HWADDR | awk '{ print toupper($0) }'`
    fi
    if [ -n "$MACADDR" ]; then
        MACADDR=`echo $MACADDR | awk '{ print toupper($0) }'`
    fi
}



expand_config ()
{
    if [ -z "${NETMASK}" ]; then
        eval `/bin/ipcalc --netmask ${IPADDR}`
    fi

    if [ -z "${PREFIX}" ]; then
        eval `/bin/ipcalc --prefix ${IPADDR} ${NETMASK}`
    fi

    if [ -z "${BROADCAST}" ]; then
        eval `/bin/ipcalc --broadcast ${IPADDR} ${NETMASK}`
    fi

    if [ -z "${NETWORK}" ]; then
        eval `/bin/ipcalc --network ${IPADDR} ${NETMASK}`
    fi
}

toggle_value ()
{
    if [ "$2" = "yes"  -o "$2" = "YES" ] ; then
        echo "$1 on"
    elif [ "$2" = "no"  -o "$2" = "NO" ] ; then
        echo "$1 off"
    else
        echo ''
    fi
}
 
do_netreport ()
{
  # Notify programs that have requested notification
  ( cd /var/run/netreport || exit
    for i in * ; do
      if [ -f $i ]; then
        OWNER=`ls -l $i | awk '{ print $3 }'`
        
        if [ "`id -u`" = "0" ]; then
          su -s /bin/bash $OWNER -c "kill -SIGIO $i >/dev/null 2>&1 || rm -f $i >/dev/null 2>&1" > /dev/null 2>&1
        else
          kill -SIGIO $i >/dev/null 2>&1 || rm -f $i >/dev/null 2>&1
        fi
      fi
    done
  )
}

# rename_device() - Rename a network device to something else
# $1 - desired name
# $2 - hardware address to name
# $3 - list of devices that are already in use
#      (for general calls, use the current device you're trying to
#       change to $1)

rename_device()
{
    /sbin/nameif "$1" "$2" || {
      local hw2=`get_hwaddr ${1}`
      local nconfig=`get_config_by_hwaddr ${hw2}`
      local dev=
      if [ -n "$nconfig"  ]; then
         dev=$(. /etc/sysconfig/network-scripts/${nconfig##*/} ; echo $DEVICE)
         for device in $3 ; do
            [ "$dev" = "$device" ] && unset dev
         done
      fi 
      [ -z "$dev" ] && dev=dev$RANDOM
      rename_device $dev $hw2 "$3 $1"
      /sbin/nameif "$1" "$2"
    }
}

# Sets $alias to the device module if $? != 0
is_available ()
{
    LC_ALL= LANG= ip -o link | grep -q $1
    [ "$?" = "1" ] || return 0

    alias=$(modprobe -c | awk \
'BEGIN { alias = ""; }
$1 == "alias" && $2 == "'"$1"'" { alias = $3; }
$1 == "install" { install[$2] = $3; }
END {
    cmd = install[alias];
    print alias;
    if (alias == "" || alias == "off" || cmd == "/bin/true" || cmd == ":")
        exit 1;
    exit 0;
}')
    [ $? -eq 0 ] || return 2

    modprobe $1 > /dev/null 2>&1 || {
      return 1
    }
    if [ -n "$HWADDR" ]; then
       local curdev=`get_device_by_hwaddr "$HWADDR"`
       if [ -z "$curdev" ]; then
          return 1
       fi
       #rename_device "$1" "$HWADDR" "$curdev"
    fi

    if [ ${alias} == "bonding" ]; then
        install_bonding_driver $1
    fi

    LC_ALL= LANG= ip -o link | grep -q $1
    return $?
}

need_hostname ()
{
    CHECK_HOSTNAME=`hostname`
    if [ "$CHECK_HOSTNAME" = "(none)" -o "$CHECK_HOSTNAME" = "localhost" -o \
        "$CHECK_HOSTNAME" = "localhost.localdomain" ]; then
        return 0
    else
        return 1
    fi
}

set_hostname ()
{
    hostname $1
    if ! grep search /etc/resolv.conf >/dev/null 2>&1; then
        domain=`echo $1 | sed 's/^[^\.]*\.//'`
        if [ -n "$domain" ]; then
                rsctmp=`mktemp /tmp/XXXXXX`;
                cat /etc/resolv.conf > $rsctmp
                echo "search $domain" >> $rsctmp
                change_resolv_conf $rsctmp
                /bin/rm -f $rsctmp
        fi      
    fi
}

check_device_down ()
{
    if echo $1 | grep -q ':' ; then
     if LC_ALL=C ifconfig -a 2>/dev/null | grep -q $1 ; then
          return 1
     else
          return 0
     fi
    else 
     if LC_ALL=C ip -o link 2>/dev/null | grep -q "$1[:@].*,UP" ; then
        return 1
     else
        return 0
     fi
    fi
}

check_mii_tool ()
{
   [ -x /sbin/mii-tool ] || return 2
   output=`LC_ALL=C mii-tool $1 2>&1`
   echo $output | LC_ALL=C grep -q "link ok" && return 1
   echo $output | LC_ALL=C grep -q "no link" && return 0 || return 2
}

check_ethtool ()
{
   [ -x /sbin/ethtool ] || return 2
   output=`LC_ALL=C ethtool $1 2>&1`
   echo $output | LC_ALL=C grep -q "Link detected: yes" && return 1
   echo $output | LC_ALL=C grep -q "Link detected: no" && return 0 || return 2
}


check_link_down ()
{
    if [ -x /sbin/mii-tool -o -x /sbin/ethtool ]; then
        if ! LC_ALL=C ip link show dev $1 2>/dev/null| grep -q UP ; then
           ip link set dev $1 up >/dev/null 2>&1
        fi
        timeout=0
        delay=10
        [ -n "$LINKDELAY" ] && delay=$(($LINKDELAY * 2))
        while [ $timeout -le $delay ]; do
            check_mii_tool $1
            m=$?
            check_ethtool $1
            e=$?
            if [ $m -eq 1 ] || [ $e -eq 1 ] ; then
                return 1
            fi
            if [ $m -eq 2 ] && [ $e -eq 2 ] ; then
                return 1
            fi
            usleep 500000
            timeout=$((timeout+1))
        done
        return 0
    fi
    return 1
}

check_default_route ()
{
    LC_ALL=C ip route list match 0/0 | grep -q default
}

find_gateway_dev ()
{
    . /etc/sysconfig/network
    if [ -n "${GATEWAY}" -a "${GATEWAY}" != "none" ] ; then
        dev=$(LC_ALL=C /sbin/ip route get to "${GATEWAY}" 2>/dev/null | \
            sed -n 's/.* dev \([[:alnum:]]*\) .*/\1/p')
        if [ -n "$dev" ]; then
            GATEWAYDEV="$dev"
        fi
    fi
}

# After the device $1 goes away, restore the standard default route; typically
# used for ppp with DEFROUTE temporarily replacing the "standard" default
# route.
# FIXME: This function doesn't support some newer features (GATEWAY in ifcfg,
# $WINDOW, $METRIC)
add_default_route ()
{
    . /etc/sysconfig/network
    check_default_route && return 0
    find_gateway_dev
    if [ "$GATEWAYDEV" != "" -a -n "${GATEWAY}" -a \
                "${GATEWAY}" != "none" ]; then
        if ! check_device_down $1; then
            if [ "$GATEWAY" = "0.0.0.0" ]; then
                /sbin/ip route add default dev ${GATEWAYDEV}
            else
                /sbin/ip route add default via ${GATEWAY}
            fi
        fi
    elif [ -f /etc/default-routes ]; then
        while read spec; do
            /sbin/ip route add $spec
        done < /etc/default-routes
        rm -f /etc/default-routes
    fi
}

is_wireless_device ()
{
    [ -x /sbin/iwconfig ] || return 1
    LC_ALL=C iwconfig $1 2>&1 | grep -q "no wireless extensions" || return 0
    return 1
}

install_bonding_driver ()
{
   ethtool -i $1 2>/dev/null | grep -q "driver: bonding" && return 0
   [ ! -f /sys/class/net/bonding_masters ] && ( modprobe bonding || return 1 )
   echo "+$1" > /sys/class/net/bonding_masters
   return 0
}

is_bonding_device ()
{
   [ -f "/sys/class/net/$1/bonding/slaves" ]
}

# Invoke this when /etc/resolv.conf has changed:
change_resolv_conf ()
{
    s=`/bin/grep '^[\ \ ]*option' /etc/resolv.conf 2>/dev/null`;
    if [ "x$s" != "x" ]; then
       s="$s"$'\n';
    fi;
    if [ $# -gt 1 ]; then
       let n_args=$#;
       while [ $n_args -gt 0 ]; 
         do 
            if [[ "$s" = *$1* ]]; then
               shift;
               let n_args=n_args-1;
               continue;
            fi;
            s="$s$1";
            shift; 
            if [ $# -gt 0 ]; then
                s="$s"$'\n';
            fi;
            let n_args=n_args-1; 
         done;       
    elif [ $# -eq 1 ]; then
       if [ "x$s" != "x" ]; then
          s="$s"`/bin/grep -vF "$s" $1`;
       else
          s=`cat $1`;
       fi;
    fi;
    (echo "$s" > /etc/resolv.conf;) >/dev/null 2>&1;
    r=$?
    if [ $r -eq 0 ]; then
        [ -x /sbin/restorecon ] && /sbin/restorecon /etc/resolv.conf >/dev/null 2>&1 # reset the correct context
        logger -p local7.notice -t "NET" -i "$0 : updated /etc/resolv.conf";
        [ -e /var/lock/subsys/nscd ] && /usr/sbin/nscd -i hosts; # invalidate cache
    fi;
    return $r;
}