Attachment 901380 Details for Bug 626514 – Latest version of dhclient-script - souorce is one from F20

Latest version of dhclient-script - souorce is one from F20

dhclient-script (text/plain), 30.61 KB, created by Hrvoje on 2014-06-02 08:44:57 UTC

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Creator: Hrvoje

Created: 2014-06-02 08:44:57 UTC

Size: 30.61 KB

patch

obsolete

>#!/bin/bash
>#
># dhclient-script: Network interface configuration script run by
>#                  dhclient based on DHCP client communication
>#
># Copyright (C) 2008-2014  Red Hat, Inc.
>#
># This program is free software; you can redistribute it and/or modify
># it under the terms of the GNU General Public License as published by
># the Free Software Foundation; either version 2 of the License, or
># (at your option) any later version.
>#
># This program is distributed in the hope that it will be useful,
># but WITHOUT ANY WARRANTY; without even the implied warranty of
># MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
># GNU General Public License for more details.
>#
># You should have received a copy of the GNU General Public License
># along with this program.  If not, see <http://www.gnu.org/licenses/>.
>#
># Author(s): David Cantrell <dcantrell@redhat.com>
>#            Jiri Popelka <jpopelka@redhat.com>
>#
># ----------
># This script is a rewrite/reworking on dhclient-script originally
># included as part of dhcp-970306:
># dhclient-script for Linux. Dan Halbert, March, 1997.
># Updated for Linux 2.[12] by Brian J. Murrell, January 1999.
># Modified by David Cantrell <dcantrell@redhat.com> for Fedora and RHEL
># ----------
>#
>
>PATH=/bin:/usr/bin:/sbin
># scripts in dhclient.d/ use $SAVEDIR (#833054)
>SAVEDIR=/var/lib/dhclient
>
>LOGFACILITY="local7"
>LOGLEVEL="notice"
>
>ETCDIR="/etc/dhcp"
>
>logmessage() {
>    msg="${1}"
>    logger -p ${LOGFACILITY}.${LOGLEVEL} -t "NET" "dhclient: ${msg}"
>}
>
>if [ -x /sbin/restorecon ]; then
>    fix_context() {
>        /sbin/restorecon ${1} >/dev/null 2>&1
>    }
>else
>    fix_context() { :; }
>fi
>
>eventually_add_hostnames_domain_to_search() {
># For the case when hostname for this machine has a domain that is not in domain_search list
># 1) get a hostname with `ipcalc --hostname` or `hostname`
># 2) get the domain from this hostname
># 3) add this domain to search line in resolv.conf if it's not already
>#    there (domain list that we have recently added there is a parameter of this function)
># We can't do this directly when generating resolv.conf in make_resolv_conf(), because
># we need to first save the resolv.conf with obtained values before we can call `ipcalc --hostname`.
># See bug 637763
>    search="${1}"
>    if need_hostname; then
>        status=1
>        if [ -n "${new_ip_address}" ]; then
>            eval $(/bin/ipcalc --silent --hostname ${new_ip_address} ; echo "status=$?")
>        elif [ -n "${new_ip6_address}" ]; then
>            eval $(/bin/ipcalc --silent --hostname ${new_ip6_address} ; echo "status=$?")
>        fi
>
>        if [ ${status} -eq 0 ]; then
>            domain=$(echo $HOSTNAME | cut -s -d "." -f 2-)
>        fi
>    else
>          domain=$(hostname 2>/dev/null | cut -s -d "." -f 2-)
>    fi
>
>    if [ -n "${domain}" ] &&
>       [ ! "${domain}" = "localdomain" ] &&
>       [ ! "${domain}" = "localdomain6" ] &&
>       [ ! "${domain}" = "(none)" ] &&
>       [[ ! "${domain}" = *\ * ]]; then
>       is_in="false"
>       for s in ${search}; do
>           if [ "${s}" = "${domain}" ] ||
>              [ "${s}" = "${domain}." ]; then
>              is_in="true"
>           fi
>       done
>
>       if [ "${is_in}" = "false" ]; then
>          # Add domain name to search list (#637763)
>          sed -i -e "s/${search}/${search} ${domain}/" /etc/resolv.conf
>       fi
>    fi
>}
>
>make_resolv_conf() {
>    [ "${PEERDNS}" = "no" ] && return
>
>    if [ "${reason}" = "RENEW" ] &&
>       [ "${new_domain_name}" = "${old_domain_name}" ] &&
>       [ "${new_domain_name_servers}" = "${old_domain_name_servers}" ]; then
>        return
>    fi
>
>    if [ -n "${new_domain_name}" ] ||
>       [ -n "${new_domain_name_servers}" ] ||
>       [ -n "${new_domain_search}" ]; then
>        rscf="$(mktemp ${TMPDIR:-/tmp}/XXXXXX)"
>        if [[ "${DNS_KEEP}" =~ ^[Yy].* ]] ; then
>            sleep 0.5
>            cat /etc/resolv.conf > ${rscf}
>            echo "; modified by /usr/local/sbin/dhclient-script" >> ${rscf}
>        else
>            echo "; generated by /usr/local/sbin/dhclient-script" > ${rscf}
>        fi
>
>        if [ -n "${SEARCH}" ]; then
>            search="${SEARCH}"
>        else
>            if [ -n "${new_domain_search}" ]; then
>                # Remove instaces of \032 (#450042)
>                search="${new_domain_search//\\032/ }"
>            elif [ -n "${new_domain_name}" ]; then
>                # Note that the DHCP 'Domain Name Option' is really just a domain
>                # name, and that this practice of using the domain name option as
>                # a search path is both nonstandard and deprecated.
>                search="${new_domain_name}"
>            fi
>        fi
>
>        if [ -n "${search}" ]; then
>            echo "search ${search}" >> $rscf
>        fi
>
>        if [ -n "${RES_OPTIONS}" ]; then
>            echo "options ${RES_OPTIONS}" >> ${rscf}
>        fi
>
>        for nameserver in ${new_domain_name_servers} ; do
>            echo "nameserver ${nameserver}" >> ${rscf}
>        done
>
>        change_resolv_conf ${rscf}
>        rm -f ${rscf}
>
>        if [ -n "${search}" ]; then
>            eventually_add_hostnames_domain_to_search "${search}"
>        fi
>
>        fix_context /etc/resolv.conf
>    elif [ -n "${new_dhcp6_name_servers}" ] ||
>         [ -n "${new_dhcp6_domain_search}" ]; then
>        rscf="$(mktemp ${TMPDIR:-/tmp}/XXXXXX)"
>        if [[ "${DNS_KEEP}" =~ ^[Yy]* ]] ; then
>            cat /etc/resolv.conf > ${rscf}
>        else
>            echo "; generated by /usr/local/sbin/dhclient-script" > ${rscf}
>        fi
>
>        if [ -n "${SEARCH}" ]; then
>            search="${SEARCH}"
>        else
>            if [ -n "${new_dhcp6_domain_search}" ]; then
>                search="${new_dhcp6_domain_search//\\032/ }"
>            fi
>        fi
>
>        if [ -n "${search}" ]; then
>            echo "search ${search}" >> $rscf
>        fi
>
>        if [ -n "${RES_OPTIONS}" ]; then
>            echo "options ${RES_OPTIONS}" >> ${rscf}
>        fi
>
>        shopt -s nocasematch 
>        for nameserver in ${new_dhcp6_name_servers} ; do
>            # If the nameserver has a link-local address
>            # add a <zone_id> (interface name) to it.
>            if  [[ "$nameserver" =~ ^fe80:: ]]
>            then
>                zone_id="%${interface}"
>            else
>                zone_id=
>            fi
>            echo "nameserver ${nameserver}$zone_id" >> ${rscf}
>        done
>        shopt -u nocasematch 
>
>        change_resolv_conf ${rscf}
>        rm -f ${rscf}
>
>        if [ -n "${search}" ]; then
>            eventually_add_hostnames_domain_to_search "${search}"
>        fi
>
>        fix_context /etc/resolv.conf
>    fi
>}
>
>exit_with_hooks() {
>    exit_status="${1}"
>
>    if [ -x ${ETCDIR}/dhclient-exit-hooks ]; then
>        . ${ETCDIR}/dhclient-exit-hooks
>    fi
>
>    exit ${exit_status}
>}
>
>quad2num() {
>    if [ $# -eq 4 ]; then
>        let n="${1} << 24 | ${2} << 16 | ${3} << 8 | ${4}"
>        echo "${n}"
>        return 0
>    else
>        echo "0"
>        return 1
>    fi
>}
>
>ip2num() {
>    IFS="." quad2num ${1}
>}
>
>num2ip() {
>    let n="${1}"
>    let o1="(n >> 24) & 0xff"
>    let o2="(n >> 16) & 0xff"
>    let o3="(n >> 8) & 0xff"
>    let o4="n & 0xff"
>    echo "${o1}.${o2}.${o3}.${o4}"
>}
>
>get_network_address() {
># get network address for the given IP address and (netmask or prefix)
>    ip="${1}"
>    nm="${2}"
>
>    if [ -n "${ip}" -a -n "${nm}" ]; then
>        if [[ "${nm}" = *.* ]]; then
>            ipcalc -s -n ${ip} ${nm} | cut -d '=' -f 2
>        else
>            ipcalc -s -n ${ip}/${nm} | cut -d '=' -f 2
>        fi
>    fi
>}
>
>get_prefix() {
># get prefix for the given IP address and mask
>    ip="${1}"
>    nm="${2}"
>
>    if [ -n "${ip}" -a -n "${nm}" ]; then
>        ipcalc -s -p ${ip} ${nm} | cut -d '=' -f 2
>    fi
>}
>
>class_bits() {
>    let ip=$(IFS='.' ip2num $1)
>    let bits=32
>    let mask='255'
>    for ((i=0; i <= 3; i++, 'mask<<=8')); do
>        let v='ip&mask'
>        if [ "$v" -eq 0 ] ; then
>             let bits-=8
>        else
>             break
>        fi
>    done
>    echo $bits
>}
>
>is_router_reachable() {
>    # handle DHCP servers that give us a router not on our subnet
>    router="${1}"
>    routersubnet="$(get_network_address ${router} ${new_subnet_mask})"
>    mysubnet="$(get_network_address ${new_ip_address} ${new_subnet_mask})"
>
>    if [ ! "${routersubnet}" = "${mysubnet}" ]; then
>        ip -4 route add ${router}/32 dev ${interface}
>        if [ "$?" -ne 0 ]; then
>            logmessage "failed to create host route for ${router}"
>            return 1
>        fi
>    fi
>
>    return 0
>}
>
>add_default_gateway() {
>    router="${1}"
>
>    if is_router_reachable ${router} ; then
>        metric=""
>        if [ $# -gt 1 ] && [ ${2} -gt 0 ]; then
>            metric="metric ${2}"
>        fi
>        ip -4 route replace default via ${router} dev ${interface} ${metric}
>        if [ $? -ne 0 ]; then
>            logmessage "failed to create default route: ${router} dev ${interface} ${metric}"
>            return 1
>        else
>            return 0
>        fi
>    fi
>
>    return 1
>}
>
>execute_client_side_configuration_scripts() {
># execute any additional client side configuration scripts we have
>    if [ "${1}" == "config" ] || [ "${1}" == "restore" ]; then
>        for f in ${ETCDIR}/dhclient.d/*.sh ; do
>            if [ -x ${f} ]; then
>                subsystem="${f%.sh}"
>                subsystem="${subsystem##*/}"
>                . ${f}
>                "${subsystem}_${1}"
>            fi
>        done
>    fi
>}
>
>flush_dev() {
># Instead of bringing the interface down (#574568)
># explicitly clear the ARP cache and flush all addresses & routes.
>    ip -4 addr flush dev ${1} >/dev/null 2>&1
>    ip -4 route flush dev ${1} >/dev/null 2>&1
>    ip -4 neigh flush dev ${1} >/dev/null 2>&1
>}
>
>dhconfig() {
>    if [ -n "${old_ip_address}" ] && [ -n "${alias_ip_address}" ] &&
>       [ ! "${alias_ip_address}" = "${old_ip_address}" ]; then
>        # possible new alias, remove old alias first
>        ip -4 addr del ${old_ip_address} dev ${interface} label ${interface}:0
>    fi
>
>    if [ -n "${old_ip_address}" ] &&
>       [ ! "${old_ip_address}" = "${new_ip_address}" ]; then
>        # IP address changed. Delete all routes, and clear the ARP cache.
>        flush_dev ${interface}
>    fi
>
>    if [ "${reason}" = "BOUND" ] || [ "${reason}" = "REBOOT" ] ||
>       [ ! "${old_ip_address}" = "${new_ip_address}" ] ||
>       [ ! "${old_subnet_mask}" = "${new_subnet_mask}" ] ||
>       [ ! "${old_network_number}" = "${new_network_number}" ] ||
>       [ ! "${old_broadcast_address}" = "${new_broadcast_address}" ] ||
>       [ ! "${old_routers}" = "${new_routers}" ] ||
>       [ ! "${old_interface_mtu}" = "${new_interface_mtu}" ]; then
>        ip -4 addr add ${new_ip_address}/${new_prefix} broadcast ${new_broadcast_address} dev ${interface} \
>           valid_lft ${new_dhcp_lease_time} preferred_lft ${new_dhcp_lease_time} >/dev/null 2>&1
>        ip link set dev ${interface} up
>
>        # The 576 MTU is only used for X.25 and dialup connections
>        # where the admin wants low latency.  Such a low MTU can cause
>        # problems with UDP traffic, among other things.  As such,
>        # disallow MTUs from 576 and below by default, so that broken
>        # MTUs are ignored, but higher stuff is allowed (1492, 1500, etc).
>        if [ -n "${new_interface_mtu}" ] && [ ${new_interface_mtu} -gt 576 ]; then
>            ip link set dev ${interface} mtu ${new_interface_mtu}
>        fi
>
>        # static routes
>        if [ -n "${new_classless_static_routes}" ] ||
>           [ -n "${new_static_routes}" ]; then
>            if [ -n "${new_classless_static_routes}" ]; then
>                IFS=', |' static_routes=(${new_classless_static_routes})
>            else
>                IFS=', |' static_routes=(${new_static_routes})
>            fi
>            route_targets=()
>
>            for((i=0; i<${#static_routes[@]}; i+=2)); do
>                target=${static_routes[$i]}
>                if [ -n "${new_classless_static_routes}" ]; then
>                    if [ ${target} = "0" ]; then
>                        # If the DHCP server returns both a Classless Static Routes option and
>                        # a Router option, the DHCP client MUST ignore the Router option. (RFC3442)
>                        new_routers=""
>                        prefix="0"
>                    else
>                        prefix=${target%%.*}
>                        target=${target#*.}
>                        IFS="." target_arr=(${target})
>                        unset IFS
>                        ((pads=4-${#target_arr[@]}))
>                        for j in $(seq $pads); do
>                            target="${target}.0"
>                        done
>
>                        # Client MUST zero any bits in the subnet number where the corresponding bit in the mask is zero.
>                        # In other words, the subnet number installed in the routing table is the logical AND of
>                        # the subnet number and subnet mask given in the Classless Static Routes option. (RFC3442)
>                        target="$(get_network_address ${target} ${prefix})"
>                    fi
>                else
>                    prefix=$(class_bits ${target})
>                fi
>                gateway=${static_routes[$i+1]}
>
>                # special case 0.0.0.0 to allow static routing for link-local addresses
>                # (including IPv4 multicast) which will not have a next-hop (#769463, #787318)
>                if [ "${gateway}" = "0.0.0.0" ]; then
>                    valid_gateway=0
>                    scope='scope link'
>                else
>                    is_router_reachable ${gateway}
>                    valid_gateway=$?
>                    scope=''
>                fi
>                if [ ${valid_gateway} -eq 0 ]; then
>                    metric=''
>                    for t in ${route_targets[@]}; do
>                        if [ ${t} = ${target} ]; then
>                            if [ -z "${metric}" ]; then
>                                metric=1
>                            else
>                                ((metric=metric+1))
>                            fi
>                        fi
>                    done
>
>                    if [ -n "${metric}" ]; then
>                        metric="metric ${metric}"
>                    fi
>
>                    ip -4 route replace ${target}/${prefix} proto static via ${gateway} dev ${interface} ${metric} ${scope}
>
>                    if [ $? -ne 0 ]; then
>                        logmessage "failed to create static route: ${target}/${prefix} via ${gateway} dev ${interface} ${metric}"
>                    else
>                        route_targets=(${route_targets[@]} ${target})
>                    fi
>                fi
>            done
>        fi
>
>        # gateways
>        if [[ ( "${DEFROUTE}" != "no" ) &&
>              (( -z "${GATEWAYDEV}" ) || ( "${GATEWAYDEV}" = "${interface}" )) ]]; then
>            if [[ ( -z "$GATEWAY" ) ||
>                  (( -n "$DHCLIENT_IGNORE_GATEWAY" ) && ( "$DHCLIENT_IGNORE_GATEWAY" = [Yy]* )) ]]; then
>                metric="${METRIC:-}"
>                let i="${METRIC:-0}"
>                default_routers=()
>
>                for router in ${new_routers} ; do
>                    added_router=-
>
>                    for r in ${default_routers[@]} ; do
>                        if [ "${r}" = "${router}" ]; then
>                            added_router=1
>                        fi
>                    done
>
>                    if [ -z "${router}" ] ||
>                       [ "${added_router}" = "1" ] ||
>                       [ $(IFS=. ip2num ${router}) -le 0 ] ||
>                       [[ ( "${router}" = "${new_broadcast_address}" ) &&
>                          ( "${new_subnet_mask}" != "255.255.255.255" ) ]]; then
>                        continue
>                    fi
>
>                    default_routers=(${default_routers[@]} ${router})
>                    add_default_gateway ${router} ${metric}
>                    let i=i+1
>                    metric=${i}
>                done
>            elif [ -n "${GATEWAY}" ]; then
>                routersubnet=$(get_network_address ${GATEWAY} ${new_subnet_mask})
>                mysubnet=$(get_network_address ${new_ip_address} ${new_subnet_mask})
>
>                if [ "${routersubnet}" = "${mysubnet}" ]; then
>                    ip -4 route replace default via ${GATEWAY} dev ${interface}
>                fi
>            fi
>        fi
>
>    else # RENEW||REBIND - only update address lifetimes
>        ip -4 addr change ${new_ip_address}/${new_prefix} broadcast ${new_broadcast_address} dev ${interface} \
>           valid_lft ${new_dhcp_lease_time} preferred_lft ${new_dhcp_lease_time} >/dev/null 2>&1
>    fi
>
>    if [ ! "${new_ip_address}" = "${alias_ip_address}" ] &&
>       [ -n "${alias_ip_address}" ]; then
>        # Reset the alias address (fix: this should really only do this on changes)
>        ip -4 addr flush dev ${interface} label ${interface}:0 >/dev/null 2>&1
>        ip -4 addr add ${alias_ip_address}/${alias_prefix} broadcast ${alias_broadcast_address} dev ${interface} label ${interface}:0
>        ip -4 route replace ${alias_ip_address}/32 dev ${interface}
>    fi
>    
>    # After dhclient brings an interface UP with a new IP address, subnet mask, 
>    # and routes, in the REBOOT/BOUND states -> search for "dhclient-up-hooks".
>    if [ "${reason}" = "BOUND" ] || [ "${reason}" = "REBOOT" ] ||
>       [ ! "${old_ip_address}" = "${new_ip_address}" ] ||
>       [ ! "${old_subnet_mask}" = "${new_subnet_mask}" ] ||
>       [ ! "${old_network_number}" = "${new_network_number}" ] ||
>       [ ! "${old_broadcast_address}" = "${new_broadcast_address}" ] ||
>       [ ! "${old_routers}" = "${new_routers}" ] ||
>       [ ! "${old_interface_mtu}" = "${new_interface_mtu}" ]; then
>        
>        if [ -x ${ETCDIR}/dhclient-${interface}-up-hooks ]; then
>            . ${ETCDIR}/dhclient-${interface}-up-hooks
>        elif [ -x ${ETCDIR}/dhclient-up-hooks ]; then
>            . ${ETCDIR}/dhclient-up-hooks
>        fi
>    fi
>
>    make_resolv_conf
>
>    if [ -n "${new_host_name}" ] && need_hostname; then
>        hostname ${new_host_name} || echo "See -nc option in dhclient(8) man page."
>    fi
>
>    if [[ ( "${DHCP_TIME_OFFSET_SETS_TIMEZONE}" = [yY1]* ) &&
>          ( -n "${new_time_offset}" ) ]]; then
>        # DHCP option "time-offset" is requested by default and should be
>        # handled.  The geographical zone abbreviation cannot be determined
>        # from the GMT offset, but the $ZONEINFO/Etc/GMT$offset file can be
>        # used - note: this disables DST.
>        ((z=new_time_offset/3600))
>        ((hoursWest=$(printf '%+d' $z)))
>
>        if (( $hoursWest < 0 )); then
>            # tzdata treats negative 'hours west' as positive 'gmtoff'!
>            ((hoursWest*=-1))
>        fi
>
>        tzfile=/usr/share/zoneinfo/Etc/GMT$(printf '%+d' ${hoursWest})
>        if [ -e ${tzfile} ]; then
>            cp -fp ${tzfile} /etc/localtime
>            touch /etc/localtime
>            fix_context /etc/localtime
>        fi
>    fi
>
>    execute_client_side_configuration_scripts "config"
>}
>
># Section 18.1.8. (Receipt of Reply Messages) of RFC 3315 says:
># The client SHOULD perform duplicate address detection on each of
># the addresses in any IAs it receives in the Reply message before
># using that address for traffic.
>add_ipv6_addr_with_DAD() {
>            ip -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
>                dev ${interface} scope global valid_lft ${new_max_life} \
>                                          preferred_lft ${new_preferred_life}
>
>            # repeatedly test whether newly added address passed
>            # duplicate address detection (DAD)
>            for i in $(seq 5); do
>                sleep 1 # give the DAD some time
>
>                # tentative flag == DAD is still not complete
>                tentative=$(ip -6 addr show dev ${interface} tentative \
>                           | grep ${new_ip6_address}/${new_ip6_prefixlen})
>                # dadfailed flag == address is already in use somewhere else
>                dadfailed=$(ip -6 addr show dev ${interface} dadfailed \
>                           | grep ${new_ip6_address}/${new_ip6_prefixlen})
>
>                if [ -n "${dadfailed}" ] ; then
>                    #ip -6 addr del ${new_ip6_address}/${new_ip6_prefixlen} dev ${interface}
>                    exit_with_hooks 3
>                fi
>                if [ -z "${tentative}" ] ; then
>                    # DAD is over
>                    return 0
>                fi
>            done
>}
>
>calc_delegated()
>{
>    if [ -n "${new_ip6_prefix}" ] ; then
>        new_ip6_dele_prefixlen=${new_ip6_prefix#*/}
>        new_ip6_dele_address=${new_ip6_prefix%/*}1
>        [ ${new_ip6_dele_prefixlen} -ne 64 ] && new_ip6_dele_prefixlen=64
>        export new_ip6_dele_address new_ip6_dele_prefixlen
>    fi
>    if [ -n "${old_ip6_prefix}" ] ; then
>        old_ip6_dele_prefixlen=${old_ip6_prefix#*/}
>        old_ip6_dele_address=${old_ip6_prefix%/*}1
>        [ ${old_ip6_dele_prefixlen} -ne 64 ] && old_ip6_dele_prefixlen=64
>        export old_ip6_dele_address old_ip6_dele_prefixlen
>    fi
>}
>
>dh6config_prefix() {
>    [ -z "${DHCPV6C_LANDEVICE}" ] && return
>
>    calc_delegated
>
>    (
>        unset new_ip6_prefix
>        unset old_ip6_prefix
>
>        #unset new_dhcp6_name_servers
>        #unset old_dhcp6_name_servers
>        #unset new_dhcp6_domain_search
>        #unset old_dhcp6_domain_search
>
>        interface=${DHCPV6C_LANDEVICE}
>
>        new_ip6_address=${new_ip6_dele_address}
>        new_ip6_prefixlen=${new_ip6_dele_prefixlen}
>        [ -n "${new_ip6_dele_address}" ] && export new_ip6_address new_ip6_prefixlen
>
>        old_ip6_address=${old_ip6_dele_address}
>        old_ip6_prefixlen=${old_ip6_dele_prefixlen}
>        [ -n "${old_ip6_dele_address}" ] && export old_ip6_address old_ip6_prefixlen
>
>        # this is here because dnsmasq will not use dynamic ip
>        new_max_life="forever"
>        export new_max_life
>
>        $0
>    )
>
>    # postavi dnsmasq
>    case "${reason}" in
>        BOUND6)
>#            echo "dhcp-range=set:ipv6doma,::1,constructor:${DHCPV6C_LANDEVICE},ra-stateless,ra-names,${new_ip6_dele_prefixlen},24h" > /etc/dnsmasq.d/ipv6-${interface}.conf
>            echo "dhcp-option=tag:ipv6doma,option6:sntp-server,[${new_ip6_prefix%/*}1]" > /etc/dnsmasq.opts/ipv6-${interface}.conf
>#            echo "dhcp-range=${new_ip6_prefix%/*}1,ra-stateless,ra-names,64,deprecated" > /etc/dnsmasq.d/ipv6-${interface}.conf
>#            systemctl restart dnsmasq
>
>            [ -f /var/run/dnsmasq.pid] && kill -HUP `cat /var/run/dnsmasq.pid`
>            ;;
>        RENEW6|REBIND6)
>            [ "${new_ip6_prefix}" = "${old_ip6_prefix}" ] && break
>
>            echo "dhcp-option=tag:ipv6doma,option6:sntp-server,[${new_ip6_prefix%/*}1]" > /etc/dnsmasq.opts/ipv6-${interface}.conf
>#            echo "dhcp-range=${new_ip6_prefix%/*}1,ra-stateless,ra-names,64,deprecated" > /etc/dnsmasq.d/ipv6-${interface}.conf
>
>            [ -f /var/run/dnsmasq.pid] && kill -HUP `cat /var/run/dnsmasq.pid`
>            ;;
>        EXPIRE6|RELEASE6|STOP6)
>            rm -f /etc/dnsmasq.opts/ipv6-${interface}.conf
>            
>            [ -f /var/run/dnsmasq.pid] && kill -HUP `cat /var/run/dnsmasq.pid`
>            ;;
>    esac
>}
>
>dh6config() {
>    if [ -n "${old_ip6_prefix}" ] ||
>       [ -n "${new_ip6_prefix}" ]; then
>        #echo Prefix ${reason} old=${old_ip6_prefix} new=${new_ip6_prefix}
>        #exit_with_hooks 0
>        dh6config_prefix
>    fi
>
>    case "${reason}" in
>        BOUND6)
>            if [ -z "${new_ip6_address}" ] ||
>               [ -z "${new_ip6_prefixlen}" ]; then
>                exit_with_hooks 2
>            fi
>
>            add_ipv6_addr_with_DAD
>
>            make_resolv_conf
>            ;;
>
>        RENEW6|REBIND6)
>            if [ -z "${new_ip6_address}" ] ||
>               [ -z "${new_ip6_prefixlen}" ]; then
>                exit_with_hooks 2
>            fi
>
>            if [  ! "${new_ip6_address}" = "${old_ip6_address}" ]; then
>                [[ -n "${old_ip6_address}" ]] && ip -6 addr del ${old_ip6_address} dev ${interface}
>                add_ipv6_addr_with_DAD
>            else # only update address lifetimes
>                ip -6 addr change ${new_ip6_address}/${new_ip6_prefixlen} \
>                   dev ${interface} scope global valid_lft ${new_max_life} \
>                                             preferred_lft ${new_preferred_life}
>            fi
>
>            if [ ! "${new_dhcp6_name_servers}" = "${old_dhcp6_name_servers}" ] ||
>               [ ! "${new_dhcp6_domain_search}" = "${old_dhcp6_domain_search}" ]; then
>                make_resolv_conf
>            fi
>            ;;
>
>        DEPREF6)
>            if [ -z "${new_ip6_prefixlen}" ]; then
>                exit_with_hooks 2
>            fi
>
>            ip -6 addr change ${new_ip6_address}/${new_ip6_prefixlen} \
>                dev ${interface} scope global preferred_lft 0
>            ;;
>    esac
>
>    execute_client_side_configuration_scripts "config"
>}
>
>
>#
># ### MAIN
>#
>
>if [ -x ${ETCDIR}/dhclient-enter-hooks ]; then
>    exit_status=0
>
>    # dhclient-enter-hooks can abort dhclient-script by setting
>    # the exit_status variable to a non-zero value
>    . ${ETCDIR}/dhclient-enter-hooks
>    if [ ${exit_status} -ne 0 ]; then
>        exit ${exit_status}
>    fi
>fi
>
>if [ ! -r /etc/sysconfig/network-scripts/network-functions ]; then
>    echo "Missing /etc/sysconfig/network-scripts/network-functions, exiting." >&2
>    exit 1
>fi
>
>if [ ! -r /etc/rc.d/init.d/functions ]; then
>    echo "Missing /etc/rc.d/init.d/functions, exiting." >&2
>    exit 1
>fi
>
>. /etc/sysconfig/network-scripts/network-functions
>. /etc/rc.d/init.d/functions
>
>if [ -f /etc/sysconfig/network ]; then
>    . /etc/sysconfig/network
>fi
>
>if [ -f /etc/sysconfig/networking/network ]; then
>    . /etc/sysconfig/networking/network
>fi
>
>cd /etc/sysconfig/network-scripts
>CONFIG="${interface}"
>need_config ${CONFIG}
>source_config >/dev/null 2>&1
>
>new_prefix="$(get_prefix ${new_ip_address} ${new_subnet_mask})"
>old_prefix="$(get_prefix ${old_ip_address} ${old_subnet_mask})"
>alias_prefix="$(get_prefix ${alias_ip_address} ${alias_subnet_mask})"
>
>
>#set > /tmp/a.x.$$
>logmessage "Executing ${reason} for ${interface}"
>
>case "${reason}" in
>    MEDIUM|ARPCHECK|ARPSEND)
>        # Do nothing
>        exit_with_hooks 0
>        ;;
>
>    PREINIT)
>        if [ -n "${alias_ip_address}" ]; then
>            # Flush alias, its routes will disappear too.
>            ip -4 addr flush dev ${interface} label ${interface}:0 >/dev/null 2>&1
>        fi
>
>        # upstream dhclient-script removes (ifconfig $interface 0 up) old adresses in PREINIT,
>        # but we sometimes (#125298) need (for iSCSI/nfs root to have a dhcp interface) to keep the existing ip
>        # flush_dev ${interface}
>        ip link set dev ${interface} up
>        if [ -n "${DHCLIENT_DELAY}" ] && [ ${DHCLIENT_DELAY} -gt 0 ]; then
>            # We need to give the kernel some time to get the interface up.
>            sleep ${DHCLIENT_DELAY}
>        fi
>
>        exit_with_hooks 0
>        ;;
>
>    PREINIT6)
>        check_parent_interface=1
>        if [[ "${DHCPV6C_KEEPOLDIP}" =~ ^[Yy].* ]] ; then
>            check_parent_interface=0
>        fi
>
>        if [ ${check_parent_interface} -eq 1 ]; then
>            # ensure interface is up
>            ip link set dev ${interface} up
>
>            # remove any stale addresses from aborted clients
>            ip -6 addr flush dev ${interface} scope global permanent
>        fi
>
>        if [ -n "${DHCPV6C_LANDEVICE}" ] ; then
>            (
>                interface=${DHCPV6C_LANDEVICE}
>                $0
>            )
>        fi
>
>        exit_with_hooks 0
>        ;;
>
>    BOUND|RENEW|REBIND|REBOOT)
>        if [ -z "${interface}" ] || [ -z "${new_ip_address}" ]; then
>            exit_with_hooks 2
>        fi
>        if arping -D -q -c2 -I ${interface} ${new_ip_address}; then
>            dhconfig
>            exit_with_hooks 0
>        else
>            # DAD failed, i.e. address is already in use
>            exit_with_hooks 1
>        fi
>        ;;
>
>    BOUND6|RENEW6|REBIND6|DEPREF6)
>        dh6config
>        exit_with_hooks 0
>        ;;
>
>    EXPIRE6|RELEASE6|STOP6)
>        if [ -n "${old_ip6_prefix}" ] ; then
>            calc_delegated
>
>            #echo "dhcp-range=${old_ip6_prefix%/*}1,${old_ip6_prefix%/*}100,ra-stateless,ra-names,64,deprecated" > /etc/dnsmasq.d/ipv6-${interface}.conf
>            #systemctl restart dnsmasq
>
>            (
>                unset old_ip6_prefix
>
>                interface=${DHCPV6C_LANDEVICE}
>
>                old_ip6_address=${old_ip6_dele_address}
>                old_ip6_prefixlen=${old_ip6_dele_prefixlen}
>
>                export old_ip6_address old_ip6_prefixlen
>
>                $0
>            )
>
>            #rm -f /etc/dnsmasq.d/ipv6-${interface}.conf
>            [ -f /var/run/dnsmasq.pid] && kill -HUP `cat /var/run/dnsmasq.pid`
>        fi
>
>        if [ -z "${old_ip6_address}" ] || [ -z "${old_ip6_prefixlen}" ]; then
>            exit_with_hooks 2
>        fi
>
>        ip -6 addr del ${old_ip6_address}/${old_ip6_prefixlen} \
>            dev ${interface}
>
>        execute_client_side_configuration_scripts "restore"
>
>        if [ -x ${ETCDIR}/dhclient-${interface}-down-hooks ]; then
>            . ${ETCDIR}/dhclient-${interface}-down-hooks
>        elif [ -x ${ETCDIR}/dhclient-down-hooks ]; then
>            . ${ETCDIR}/dhclient-down-hooks
>        fi
>
>        exit_with_hooks 0
>        ;;
>
>    EXPIRE|FAIL|RELEASE|STOP)
>        execute_client_side_configuration_scripts "restore"
>
>        if [ -x ${ETCDIR}/dhclient-${interface}-down-hooks ]; then
>            . ${ETCDIR}/dhclient-${interface}-down-hooks
>        elif [ -x ${ETCDIR}/dhclient-down-hooks ]; then
>            . ${ETCDIR}/dhclient-down-hooks
>        fi
>
>        if [ -n "${alias_ip_address}" ]; then
>            # Flush alias
>            ip -4 addr flush dev ${interface} label ${interface}:0 >/dev/null 2>&1
>        fi
>
>        if [ -n "${old_ip_address}" ]; then
>            # Delete addresses/routes/arp cache.
>            flush_dev ${interface}
>        fi
>
>        if [ -n "${alias_ip_address}" ]; then
>            ip -4 addr add ${alias_ip_address}/${alias_prefix} broadcast ${alias_broadcast_address} dev ${interface} label ${interface}:0
>            ip -4 route replace ${alias_ip_address}/32 dev ${interface}
>        fi
>
>        exit_with_hooks 0
>        ;;
>
>    TIMEOUT)
>        if [ -n "${new_routers}" ]; then
>            if [ -n "${alias_ip_address}" ]; then
>                ip -4 addr flush dev ${interface} label ${interface}:0 >/dev/null 2>&1
>            fi
>
>            ip -4 addr add ${new_ip_address}/${new_prefix} \
>                broadcast ${new_broadcast_address} dev ${interface} \
>                valid_lft ${new_dhcp_lease_time} preferred_lft ${new_dhcp_lease_time}
>            set ${new_routers}
>
>            if ping -q -c 1 -w 10 -I ${interface} ${1}; then
>                dhconfig
>                exit_with_hooks 0
>            fi
>
>            flush_dev ${interface}
>            exit_with_hooks 1
>        else
>            exit_with_hooks 1
>        fi
>        ;;
>
>    *)
>        logmessage "unhandled state: ${reason}"
>        exit_with_hooks 1
>        ;;
>esac
>
>exit_with_hooks 0

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Attachments on bug 626514: 443055 | 443060 | 443128 | 446301 | 446939 | 596257 | 598914 | 602341 | 602342 | 602343 | 602344 | 602345 | 740389 | 740393 | 740670 | 741830 | 741831 | 743452 | 743453 | 819281 | 819282 | 819283 | 821802 | 901378 | 901379 | 901380