--- /dev/null
+#!/bin/bash
+#
+# dhclient-script: Network interface configuration script run by
+# dhclient based on DHCP client communication
+#
+# Copyright (C) 2008 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>
+#
+# ----------
+# 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
+SAVEDIR=/var/lib/dhclient
+
+LOGFACILITY="local7"
+LOGLEVEL="notice"
+
+logmessage() {
+ msg="${1}"
+ logger -p ${LOGFACILITY}.${LOGLEVEL} -t "NET" "dhclient: ${msg}"
+}
+
+save_previous() {
+ origfile="${1}"
+ savefile="${SAVEDIR}/${origfile##*/}.predhclient.${interface}"
+
+ if [ ! -d ${SAVEDIR} ]; then
+ mkdir -p ${SAVEDIR}
+ fi
+
+ if [ -e ${origfile} ]; then
+ mv ${origfile} ${savefile}
+ else
+ echo > ${savefile}
+ fi
+}
+
+make_resolv_conf() {
+ [ "${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
+ save_previous /etc/resolv.conf
+ rscf="$(mktemp /tmp/XXXXXX)"
+ echo "; generated by /sbin/dhclient-script" > ${rscf}
+
+ if [ -n "${SEARCH}" ]; then
+ echo "search ${SEARCH}" >> $rscf
+ else
+ if [ -n "${new_domain_search}" ]; then
+ echo "search ${new_domain_search//\\032/ }" >> ${rscf}
+ elif [ -n "${new_domain_name}" ]; then
+ echo "search ${new_domain_name//\\032/ }" >> ${rscf}
+ fi
+ fi
+
+ if [ -n "${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 ${rscf}
+ fi
+}
+
+exit_with_hooks() {
+ exit_status="${1}"
+
+ if [ -x /etc/dhclient-exit-hooks ]; then
+ . /etc/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}"
+}
+
+mask() {
+ ip="${1}"
+ m="${2}"
+ let ip="$(IFS="." ip2num ${ip})"
+ let m="$(IFS="." ip2num ${m})"
+ let n="ip & m"
+ num2ip ${n}
+}
+
+class_bits() {
+ let ip=$(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="$(mask ${router} ${new_subnet_mask})"
+ mysubnet="$(mask ${new_ip_address} ${new_subnet_mask})"
+ unreachable=0
+
+ if [ ! "${routersubnet}" = "${mysubnet}" ]; then
+ unreachable=1
+ if arping -f -q -I ${interface} -w2 ${router}; then
+ ip route add ${router}/32 dev ${interface}
+ if [ $? -eq 0 ]; then
+ unreachable=0
+ else
+ logmessage "failed to create host router for unreachable router ${router} not on subnet ${mysubnet}"
+ fi
+ else
+ unreachable=1
+ logmessage "DHCP router ${router} is unreachable on DHCP subnet ${mysubnet} router subnet ${routersubnet}"
+ fi
+ fi
+
+ return ${unreachable}
+}
+
+add_default_gateway() {
+ router="${1}"
+ metric=""
+
+ if [ $# -gt 1 ] && [ ${2} -gt 0 ]; then
+ metric="metric ${2}"
+ fi
+
+ if is_router_reachable ${router} ; then
+ ip route replace default via ${router} dev ${interface} ${metric}
+ if [ $? -ne 0 ]; then
+ logmessage "failed to create default route: ${router} dev ${interface} ${metric}"
+ return 1
+ else
+ return 0
+ fi
+ fi
+
+ return 1
+}
+
+dhconfig() {
+ if [ -n "${old_ip_address}" ] && [ -n "${alias_ip_address}" ] &&
+ [ ! "${alias_ip_address}" = "${old_ip_address}" ]; then
+ # possible new alias, remove old alias first
+ ip -family inet addr del ${old_ip_address} dev ${interface}:0
+ fi
+
+ if [ -n "${old_ip_address}" ] &&
+ [ ! "${old_ip_address}" = "${new_ip_address}" ]; then
+ # IP address changed. Bringing down the interface will delete all
+ # routes, and clear the ARP cache.
+ ip -family inet addr flush dev ${interface} >/dev/null 2>&1
+ ip -family inet link set dev ${interface} down
+ fi
+
+ if [ "${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 -family inet addr add ${new_ip_address}/${new_prefix} broadcast ${new_broadcast_address} dev ${interface}
+
+ if [ -n "${new_interface_mtu}" ]; then
+ ip link set ${interface} mtu ${new_interface_mtu}
+ fi
+
+ if [ -x /etc/dhclient-${interface}-up-hooks ]; then
+ . /etc/dhclient-${interface}-up-hooks
+ elif [ -x /etc/dhclient-up-hooks ]; then
+ . /etc/dhclient-up-hooks
+ fi
+
+ if [[ (( -z "${GATEWAYDEV}" ) ||
+ ( "${GATEWAYDEV}" = "${interface}" )) &&
+ (( -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 [[ (( -z "${GATEWAYDEV}" ) ||
+ ( "${GATEWAYDEV}" = "${interface}" )) &&
+ ( -n "${GATEWAY}" ) ]]; then
+ routersubnet=$(mask ${GATEWAY} ${new_subnet_mask})
+ mysubnet=$(mask ${new_ip_address} ${new_subnet_mask})
+
+ if [ "${routersubnet}" = "${mysubnet}" ]; then
+ ip route replace default via ${GATEWAY} dev ${interface}
+ fi
+ fi
+
+ # static routes
+ if [ -n "${new_static_routes}" ]; then
+ IFS=', |' static_routes=(${new_static_routes})
+ route_targets=()
+
+ for((i=0; i<${#static_routes[@]}; i+=2)); do
+ target=${static_routes[$i]}
+ gateway=${static_routes[$i+1]}
+ 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
+
+ if is_router_reachable ${gateway}; then
+ ip route replace ${target}/$(class_bits ${target}) via ${gateway} dev ${interface} ${metric}
+
+ if [ $? -ne 0 ]; then
+ logmessage "failed to create static route: ${target}/$(class_bits ${target}) via ${gateway} dev ${interface} ${metric}"
+ else
+ route_targets=(${route_targets[@]} ${target})
+ fi
+ fi
+ done
+ fi
+ fi
+
+ if [ ! "${new_ip_address}" = "${alias_ip_address}" ] &&
+ [ -n "${alias_ip_address}" ]; then
+ ip -family inet addr flush dev ${interface}:0 >/dev/null 2>&1
+ ip -family inet addr add ${alias_ip_address}/${alias_prefix} dev ${interface}:0
+ ip route replace ${alias_ip_address}/32 dev ${interface}:0
+ fi
+
+ make_resolv_conf
+
+ if [ -n "${new_host_name}" ] && need_hostname; then
+ hostname ${new_host_name}
+ fi
+
+ if [ ! "${PEERNIS}" = "no" ]; then
+ if [ -n "${new_nis_domain}" ]; then
+ domainname "${new_nis_domain}"
+ save_previous /etc/yp.conf
+ let contents=0
+ echo '# generated by /sbin/dhclient-script' > /etc/yp.conf
+
+ if [ -n "${new_nis_servers}" ]; then
+ for i in ${new_nis_servers} ; do
+ echo "domain ${new_nis_domain} server ${i}" >> /etc/yp.conf
+ let contents=contents+1
+ done
+ else
+ echo "domain ${new_nis_domain} broadcast" >> /etc/yp.conf
+ let contents=contents+1
+ fi
+
+ if [ ${contents} -gt 0 ]; then
+ if [ -x /etc/rc.d/init.d/ypbind ] &&
+ [ -r /var/run/ypbind.pid ]; then
+ service ypbind restart >/dev/null 2>&1
+ fi
+ fi
+ elif [ -n "${new_nis_servers}" ]; then
+ save_previous /etc/yp.conf
+ echo '# generated by /sbin/dhclient-script' > /etc/yp.conf
+ let contents=0
+
+ for i in ${new_nis_servers} ; do
+ echo "ypserver ${i}" >> /etc/yp.conf
+ let contents=contents+1
+ done
+
+ if [ $contents -gt 0 ]; then
+ if [ -x /etc/rc.d/init.d/ypbind ] &&
+ [ -r /var/run/ypbind.pid ]; then
+ service ypbind restart >/dev/null 2>&1
+ fi
+ fi
+ fi
+ fi
+
+ if [ -n "${DHCP_TIME_OFFSET_SETS_TIMEZONE}" ] &&
+ [[ "${DHCP_TIME_OFFSET_SETS_TIMEZONE}" = [yY1]* ]]; then
+ if [ -n "${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
+ save_previous /etc/localtime
+ cp -fp ${tzfile} /etc/localtime
+ touch /etc/localtime
+ fi
+ fi
+ fi
+
+ if [ ! "${PEERNTP}" = "no" ] &&
+ [ -n "${new_ntp_servers}" ] && [ -e /etc/ntp.conf ]; then
+ save_previous /etc/ntp.conf
+ egrep -v '^server .* # added by /sbin/dhclient-script$'< ${SAVEDIR}/ntp.conf.predhclient.${interface} > /etc/ntp.conf
+
+ for s in ${new_ntp_servers} ; do
+ echo "server ${s} # added by /sbin/dhclient-script" >> /etc/ntp.conf
+ done
+
+ diff -q /etc/ntp.conf ${SAVEDIR}/ntp.conf.predhclient.${interface} >/dev/null 2>&1
+ if [ $? -eq 1 ]; then
+ service ntpd condrestart >/dev/null 2>&1
+ fi
+ fi
+}
+
+get_prefix() {
+ ip="${1}"
+ nm="${2}"
+
+ if [ -n "${ip}" -a -n "${nm}" ]; then
+ ipcalc -s -p ${ip} ${nm} | cut -d '=' -f 2
+ fi
+}
+
+
+#
+# ### MAIN
+#
+
+if [ -x /etc/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
+ . /etc/dhclient-enter-hooks
+ if [ ${exit_status} -ne 0 ]; then
+ exit ${exit_status}
+ fi
+fi
+
+if [ ! -r /etc/sysconfig/network-scripts/network-functions ]; then
+ echo "Missing /etc/sysconfig/network-scripts/network-functions, exiting." >&2
+ exit 1
+fi
+
+if [ ! -r /etc/rc.d/init.d/functions ]; then
+ echo "Missing /etc/rc.d/init.d/functions, exiting." >&2
+ exit 1
+fi
+
+. /etc/sysconfig/network-scripts/network-functions
+. /etc/rc.d/init.d/functions
+
+if [ -f /etc/sysconfig/network ]; then
+ . /etc/sysconfig/network
+fi
+
+if [ -f /etc/sysconfig/networking/network ]; then
+ . /etc/sysconfig/networking/network
+fi
+
+CONFIG="/etc/sysconfig/network-scripts/ifcfg-${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} ${new_subnet_mask})"
+alias_prefix="$(get_prefix ${alias_ip_address} ${alias_subnet_mask})"
+
+case "${reason}" in
+ MEDIUM)
+ # Linux doesn't handle mediums (media)
+ exit_with_hooks 0
+ ;;
+
+ PREINIT)
+ if [ -n "${alias_ip_address}" ]; then
+ # Bring down alias interface, its routes will disappear too.
+ ip -family inet link set ${interface}:0 down
+ fi
+
+ if [ "${keep_old_ip}" = "yes" ]; then
+ ip -family inet link set ${interface} up
+ else
+ ip -family inet addr flush dev ${interface} >/dev/null 2>&1
+ ip -family inet link set ${interface} up
+ fi
+
+ if [ -n "${DHCLIENT_DELAY}" ] && [ ${DHCLIENT_DELAY} -gt 0 ]; then
+ sleep ${DHCLIENT_DELAY}
+ fi
+
+ exit_with_hooks 0
+ ;;
+
+ ARPCHECK|ARPSEND)
+ if [ -z "${new_ip_address}" ] || [ -z "${interface}" ] ||
+ arping -q -f -c 2 -w 3 -D -I ${interface} ${new_ip_address}; then
+ exit_with_hooks 0
+ else
+ exit_with_hooks 1
+ fi
+ ;;
+
+ BOUND|RENEW|REBIND|REBOOT)
+ dhconfig
+ exit_with_hooks 0
+ ;;
+
+ EXPIRE|FAIL|RELEASE|STOP)
+ # only restore config files if there are no other dhclient processes
+ # running (#306381)
+ any_other_clients="$(ps -eo pid,ppid,comm | grep dhclient | grep -v ${PPID})"
+ if [ -n "${any_other_clients}" ]; then
+ if [ -f ${SAVEDIR}/resolv.conf.predhclient.${interface} ]; then
+ change_resolv_conf ${SAVEDIR}/resolv.conf.predhclient.${interface}
+ rm -f ${SAVEDIR}/resolv.conf.predhclient.${interface}
+ fi
+
+ if [ -n "${DHCP_TIME_OFFSET_SETS_TIMEZONE}" ] &&
+ [[ "${DHCP_TIME_OFFSET_SETS_TIMEZONE}" = [yY1]* ]]; then
+ if [ -e ${SAVEDIR}/localtime.predhclient.${interface} ]; then
+ rm -f /etc/localtime
+ mv ${SAVEDIR}/localtime.predhclient.${interface} /etc/localtime
+ touch /etc/localtime
+ fi
+ fi
+
+ if [ -f ${SAVEDIR}/ntp.conf.predhclient.${interface} ]; then
+ rm -f /etc/ntp.conf
+ mv -f ${SAVEDIR}/ntp.conf.predhclient.${interface} /etc/ntp.conf
+ service ntpd condrestart >/dev/null 2>&1
+ fi
+
+ if [ -f ${SAVEDIR}/yp.conf.predhclient.${interface} ]; then
+ rm -f /etc/yp.conf
+ mv -f ${SAVEDIR}/yp.conf.predhclient.${interface} /etc/yp.conf
+ if [ -x /etc/rc.d/init.d/ypbind ] && [ -r /var/run/ypbind.pid ]; then
+ service ypbind restart >/dev/null 2>&1
+ fi
+ fi
+ fi
+
+ if [ -x /etc/dhclient-${interface}-down-hooks ]; then
+ . /etc/dhclient-${interface}-down-hooks
+ elif [ -x /etc/dhclient-down-hooks ]; then
+ . /etc/dhclient-down-hooks
+ fi
+
+ if [ -n "${alias_ip_address}" ]; then
+ # Turn off alias interface
+ ip -family inet link set ${interface}:0 down
+ fi
+
+ if [ -n "${old_ip_address}" ]; then
+ # Shut down interface, which will delete routes and clear arp cache.
+ ip -family inet addr flush dev ${interface} >/dev/null 2>&1
+ ip -family inet link set ${interface} down
+ fi
+
+ if [ -n "${alias_ip_address}" ]; then
+ ip -family inet addr add ${alias_ip_address}/${alias_prefix} dev ${interface}:0
+ ip -family inet route replace ${alias_ip_address}/32 ${interface}:0
+ fi
+
+ exit_with_hooks 0
+ ;;
+
+ TIMEOUT)
+ if [ -n "${new_routers}" ]; then
+ if [ -n "${alias_ip_address}" ]; then
+ ip -family inet addr flush dev ${interface}:0 >/dev/null 2>&1
+ fi
+
+ ip -family inet addr add ${new_ip_address}/${new_prefix} broadcast ${new_broadcast_address} dev ${interface}
+ set ${new_routers}
+
+ if ping -q -c 1 -w 10 -I ${interface} ${1}; then
+ dhconfig
+ exit_with_hooks 0
+ fi
+
+ ip -family inet addr flush dev ${interface} >/dev/null 2>&1
+ ip -family inet link set ${interface} down
+ exit_with_hooks 1
+ else
+ exit_with_hooks 1
+ fi
+ ;;
+
+ *)
+ logmessage "unhandled state: ${reason}"
+ exit_with_hooks 1
+ ;;
+esac
+
+exit_with_hooks 0
projects / people / ms / ipfire-3.x.git / blobdiff