+++ /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 / commitdiff
