- Rewrite of /sbin/dhclient-script (make the script a little more readable,
discontinue use of ifconfig in favor of ip, store backup copies of orig
files in /var rather than in /etc)
This commit is contained in:
David Cantrell
parent
6961ce445f
commit
ee7ca6e29b
@ -4,7 +4,7 @@
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Summary: DHCP (Dynamic Host Configuration Protocol) server and relay agent
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Name: dhcp
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Version: 4.0.0
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Release: 19%{?dist}
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Release: 20%{?dist}
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# NEVER CHANGE THE EPOCH on this package. The previous maintainer (prior to
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# dcantrell maintaining the package) made incorrect use of the epoch and
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# that's why it is at 12 now. It should have never been used, but it was.
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@ -440,6 +440,11 @@ fi
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%{_libdir}/libdhcp4client.so
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%changelog
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* Fri Aug 22 2008 David Cantrell <dcantrell@redhat.com> - 12:4.0.0-20
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- Rewrite of /sbin/dhclient-script (make the script a little more readable,
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discontinue use of ifconfig in favor of ip, store backup copies of orig
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files in /var rather than in /etc)
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* Wed Aug 06 2008 David Cantrell <dcantrell@redhat.com> - 12:4.0.0-19
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- Remove 'c' from the domain-search format string in common/tables.c
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- Prevent \032 from appearing in resolv.conf search line (#450042)
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779
linux
779
linux
@ -1,171 +1,145 @@
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#!/bin/bash
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#
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# dhclient-script: Network interface configuration script run by
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# dhclient based on DHCP client communication
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#
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# Copyright (C) 2008 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Author(s): David Cantrell <dcantrell@redhat.com>
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#
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# ----------
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# This script is a rewrite/reworking on dhclient-script originally
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# included as part of dhcp-970306:
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# dhclient-script for Linux. Dan Halbert, March, 1997.
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# Updated for Linux 2.[12] by Brian J. Murrell, January 1999.
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# No guarantees about this. I'm a novice at the details of Linux
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# networking.
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#
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# Modified by David Cantrell <dcantrell@redhat.com> for Fedora and RHEL
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# ----------
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#
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# Notes:
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PATH=/bin:/usr/bin:/sbin
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SAVEDIR=/var/lib/dhclient
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# 0. This script is based on the netbsd script supplied with dhcp-970306.
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LOGFACILITY="local7"
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LOGLEVEL="notice"
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# 1. ifconfig down apparently deletes all relevant routes and flushes
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# the arp cache, so this doesn't need to be done explicitly.
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logmessage() {
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msg="${1}"
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logger -p ${LOGFACILITY}.${LOGLEVEL} -t "NET" "dhclient: ${msg}"
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}
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# 2. The alias address handling here has not been tested AT ALL.
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# I'm just going by the doc of modern Linux ip aliasing, which uses
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# notations like eth0:0, eth0:1, for each alias.
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save_previous() {
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origfile="${1}"
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savefile="${SAVEDIR}/${origfile##*/}.predhclient.${interface}"
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# 3. I have to calculate the network address, and calculate the broadcast
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# address if it is not supplied. This might be much more easily done
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# by the dhclient C code, and passed on.
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if [ ! -d ${SAVEDIR} ]; then
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mkdir -p ${SAVEDIR}
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fi
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PATH=/bin:/usr/bin
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function save_previous() {
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if [ -e $1 ]; then
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mv $1 $1.predhclient.$interface
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if [ -e ${origfile} ]; then
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mv ${origfile} ${savefile}
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else
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echo ''> $1.predhclient.$interface
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echo > ${savefile}
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fi
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if [ -x /sbin/restorecon ]; then
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/sbin/restorecon $1.predhclient.$interface >/dev/null 2>&1
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fi
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restorecon ${savefile} >/dev/null 2>&1
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}
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make_resolv_conf() {
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if [ "${PEERDNS}" == "no" ]; then
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[ "${PEERDNS}" = "no" ] && return
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if [ "${reason}" = "RENEW" ] &&
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[ "${new_domain_name}" = "${old_domain_name}" ] &&
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[ "${new_domain_name_servers}" = "${old_domain_name_servers}" ]; then
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return
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fi
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if [ x$reason == xRENEW ] &&
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[ "$new_domain_name" == "$old_domain_name" ] &&
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[ "$new_domain_name_servers" == "$old_domain_name_servers" ]; then
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return
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fi
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if [ -n "$new_domain_name" ] || [ -n "$new_domain_name_servers" ] || [ -n "$new_domain_search" ]; then
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if [ -n "${new_domain_name}" ] ||
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[ -n "${new_domain_name_servers}" ] ||
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[ -n "${new_domain_search}" ]; then
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save_previous /etc/resolv.conf
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rscf=`mktemp /tmp/XXXXXX`;
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echo '; generated by /sbin/dhclient-script' > $rscf
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rscf="$(mktemp /tmp/XXXXXX)"
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echo "; generated by /sbin/dhclient-script" > ${rscf}
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if [ -n "$SEARCH" ]; then
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echo "search $SEARCH" >> $rscf
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if [ -n "${SEARCH}" ]; then
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echo "search ${SEARCH}" >> $rscf
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else
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if [ -n "$new_domain_search" ]; then
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echo "search ${new_domain_search//\\032/ }" >> $rscf
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elif [ -n "$new_domain_name" ]; then
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echo "search ${new_domain_name//\\032/ }" >> $rscf
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if [ -n "${new_domain_search}" ]; then
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echo "search ${new_domain_search//\\032/ }" >> ${rscf}
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elif [ -n "${new_domain_name}" ]; then
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echo "search ${new_domain_name//\\032/ }" >> ${rscf}
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fi
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fi
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if [ -n "$RES_OPTIONS" ]; then
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echo "options $RES_OPTIONS" >> $rscf
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if [ -n "${RES_OPTIONS}" ]; then
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echo "options ${RES_OPTIONS}" >> ${rscf}
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fi
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for nameserver in $new_domain_name_servers; do
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echo nameserver $nameserver >> $rscf
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for nameserver in ${new_domain_name_servers} ; do
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echo "nameserver ${nameserver}" >> ${rscf}
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done
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change_resolv_conf $rscf
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rm -f $rscf
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change_resolv_conf ${rscf}
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rm -f ${rscf}
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fi
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}
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# Must be used on exit. Invokes the local dhcp client exit hooks, if any.
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exit_with_hooks() {
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exit_status=$1
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exit_status="${1}"
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if [ -f /etc/dhclient-exit-hooks ]; then
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if [ -x /etc/dhclient-exit-hooks ]; then
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. /etc/dhclient-exit-hooks
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fi
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# probably should do something with exit status of the local script
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exit $exit_status
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exit ${exit_status}
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}
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# Invoke the local dhcp client enter hooks, if they exist.
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if [ -f /etc/dhclient-enter-hooks ]; then
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exit_status=0
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. /etc/dhclient-enter-hooks
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# allow the local script to abort processing of this state
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# local script must set exit_status variable to nonzero.
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if [ $exit_status -ne 0 ]; then
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exit $exit_status
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fi
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fi
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# Import Red Hat Linux configuration
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cd /etc/sysconfig/network-scripts;
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. /etc/sysconfig/network-scripts/network-functions
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. /etc/rc.d/init.d/functions
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[ -f ../network ] && . ../network
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[ -f ../networking/network ] && . ../networking/network
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CONFIG=$interface
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need_config ${CONFIG}
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if [ -f "${CONFIG}" ]; then
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source_config
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else
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echo $"$0: configuration for $interface not found. Continuing with defaults." >&2
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fi
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source_config
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release=$(uname -r)
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relmajor=$(echo $release | cut -f1 -d'.')
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relminor=$(echo $release | cut -f2 -d'.')
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# simple IP arithmetic functions:
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function quad2num() {
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quad2num() {
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if [ $# -eq 4 ]; then
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let n="$1<<24|$2<<16|$3<<8|$4"
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echo $n
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let n="${1} << 24 | ${2} << 16 | ${3} << 8 | ${4}"
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echo "${n}"
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return 0
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else
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echo "0"
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return 1
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fi
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echo '0'
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return 1
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}
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function ip2num() {
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IFS='.' quad2num $1
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ip2num() {
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IFS="." quad2num ${1}
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}
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function num2ip() {
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let n="$1"
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let o1='(n>>24)&0xff'
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let o2='(n>>16)&0xff'
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let o3='(n>>8)&0xff'
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let o4='n & 0xff'
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echo $o1.$o2.$o3.$o4
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num2ip() {
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let n="${1}"
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let o1="(n >> 24) & 0xff"
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let o2="(n >> 16) & 0xff"
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let o3="(n >> 8) & 0xff"
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let o4="n & 0xff"
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echo "${o1}.${o2}.${o3}.${o4}"
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}
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function mask() {
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ip=$1
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m=$2
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let ip=$(IFS='.' ip2num $ip)
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let m=$(IFS='.' ip2num $m)
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let n='ip&m'
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num2ip $n
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mask() {
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ip="${1}"
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m="${2}"
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let ip="$(IFS="." ip2num ${ip})"
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let m="$(IFS="." ip2num ${m})"
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let n="ip & m"
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num2ip ${n}
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}
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function mask_bits() {
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ip=$1
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let ip=$(IFS='.' ip2num $ip)
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let bits=0
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for ((bit=1; '((ip&bit)==0) && (bits < 32)'; 'bit<<=1')) do
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let bits+=1
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done
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let n_bits=32-bits
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echo $n_bits
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}
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function class_bits() {
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class_bits() {
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let ip=$(IFS='.' ip2num $1)
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let bits=32
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let mask='255'
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@ -180,71 +154,78 @@ function class_bits() {
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echo $bits
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}
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function routerReachable() {
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# Handle silly DHCP servers that give us a router not on our subnet:
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router=$1
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routerSubnet=$(mask $router $new_subnet_mask)
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mySubnet=$(mask $new_ip_address $new_subnet_mask)
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is_router_reachable() {
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# handle DHCP servers that give us a router not on our subnet
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router="${1}"
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routersubnet="$(mask ${router} ${new_subnet_mask})"
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mysubnet="$(mask ${new_ip_address} ${new_subnet_mask})"
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unreachable=0
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if [ "$routerSubnet" != "$mySubnet" ]; then
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if [ ! "${routersubnet}" = "${mysubnet}" ]; then
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unreachable=1
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if /sbin/arping -f -q -I $interface -w2 $router; then
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/sbin/ip route add ${router}/32 dev $interface
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if [ $? -eq 0 ]; then
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unreachable=0
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else
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/usr/bin/logger -p local7.notice -t "NET" "dhclient: failed to create host route for unreachable router $router not on subnet $mySubnet";
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fi
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if arping -f -q -I ${interface} -w2 ${router}; then
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ip route add ${router}/32 dev ${interface}
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if [ $? -eq 0 ]; then
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unreachable=0
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else
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logmessage "failed to create host router for unreachable router ${router} not on subnet ${mysubnet}"
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fi
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else
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unreachable=1
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if [ -x /usr/bin/logger ]; then
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/usr/bin/logger -p local7.notice -t "NET" "dhclient: DHCP router $router is unreachable on DHCP subnet $mySubnet router subnet $routerSubnet";
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fi
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unreachable=1
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logmessage "DHCP router ${router} is unreachable on DHCP subnet ${mysubnet} router subnet ${routersubnet}"
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fi
|
||||
fi
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||||
return $unreachable
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||||
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||||
return ${unreachable}
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||||
}
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||||
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||||
function add_default_gateway() {
|
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router=$1
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metric=''
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||||
if [ $# -gt 1 ] && [ "$2" -gt 0 ]; then
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metric="metric $2"
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add_default_gateway() {
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router="${1}"
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metric=""
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|
||||
if [ $# -gt 1 ] && [ "${2}" -gt 0 ]; then
|
||||
metric="metric ${2}"
|
||||
fi
|
||||
if routerReachable $router ; then
|
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/sbin/ip route replace default via $router dev $interface $metric
|
||||
|
||||
if is_router_reachable ${router} ; then
|
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ip route replace default via ${router} dev ${interface} ${metric}
|
||||
if [ $? -ne 0 ]; then
|
||||
/usr/bin/logger -p local7.notice -t "NET" 'dhclient: failed to create default route: '$router dev $interface $metric
|
||||
logmessage "failed to create default route: ${router} dev ${interface} ${metric}"
|
||||
return 1
|
||||
else
|
||||
return 0
|
||||
fi
|
||||
fi
|
||||
|
||||
return 1
|
||||
}
|
||||
|
||||
function dhconfig() {
|
||||
if [ x$old_ip_address != x ] && [ x$alias_ip_address != x ] && [ x$alias_ip_address != x$old_ip_address ]; then
|
||||
# Possible new alias. Remove old alias.
|
||||
ifconfig $interface:0- inet 0
|
||||
dhconfig() {
|
||||
if [ -n "${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 ${interface}:0
|
||||
fi
|
||||
|
||||
if [ x$old_ip_address != x ] && [ x$old_ip_address != x$new_ip_address ]; then
|
||||
# IP address changed. Bringing down the interface will delete all
|
||||
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.
|
||||
ifconfig $interface inet 0 down
|
||||
ip -family inet addr flush dev ${interface}
|
||||
ip -family inet link set dev ${interface} down
|
||||
fi
|
||||
|
||||
if [ x$reason = xBOUND ] || [ x$reason = xREBOOT ] ||
|
||||
[ x$old_ip_address != x$new_ip_address ] ||
|
||||
[ x$old_subnet_mask != x$new_subnet_mask ] ||
|
||||
[ x$new_network_number != x$new_network_number ] ||
|
||||
[ x$old_broadcast_address != x$new_broadcast_address ] ||
|
||||
[ "x$old_routers" != "x$new_routers" ] ||
|
||||
[ x$old_interface_mtu != x$new_interface_mtu ] ; then
|
||||
ifconfig $interface inet $new_ip_address $new_subnet_arg $new_broadcast_arg
|
||||
if [ -n "$new_interface_mtu" ]; then
|
||||
/sbin/ip link set $interface mtu $new_interface_mtu
|
||||
if [ "${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
|
||||
@ -253,50 +234,51 @@ function dhconfig() {
|
||||
. /etc/dhclient-up-hooks
|
||||
fi
|
||||
|
||||
prefix_bits=$(mask_bits $new_subnet_mask)
|
||||
# Add a network route to the computed network address.
|
||||
if [ $relmajor -lt 2 ] || ( [ $relmajor -eq 2 ] && [ $relminor -eq 0 ] ); then
|
||||
/sbin/ip route replace ${new_network_number}/${prefix_bits} dev $interface
|
||||
if [ $added_old_broadcast_route -eq 1 ]; then
|
||||
/sbin/ip route del default
|
||||
fi
|
||||
fi
|
||||
|
||||
if [[ (( -z "$GATEWAYDEV" ) || ( "$GATEWAYDEV" = "$interface" )) && (( -z "$GATEWAY" ) || (( -n "$DHCLIENT_IGNORE_GATEWAY" ) && ( "$DHCLIENT_IGNORE_GATEWAY" = [Yy]* ))) ]]; then
|
||||
metric=${METRIC:-''}
|
||||
let i=${METRIC:-0}
|
||||
if [[ (( -z "${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=0
|
||||
for router in ${new_routers} ; do
|
||||
added_router=-
|
||||
|
||||
for r in ${default_routers[@]}; do
|
||||
if [ "$r" == "$router" ]; then
|
||||
for r in ${default_routers[@]} ; do
|
||||
if [ "${r}" = "${router}" ]; then
|
||||
added_router=1
|
||||
fi
|
||||
done
|
||||
|
||||
if [ -z "$router" ] || [ "$added_router" -eq 1 ] || [ $(IFS=. ip2num $router) -le 0 ] || [[ ( "$router" = "$new_broadcast_address" ) && ( "$new_subnet_mask" != "255.255.255.255" ) ]]; then
|
||||
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 $metric
|
||||
default_routers=(${default_routers[@]} ${router})
|
||||
add_default_gateway ${router} ${metric}
|
||||
let i=i+1
|
||||
metric=$i
|
||||
metric=${i}
|
||||
done
|
||||
elif [[ (( -z "$GATEWAYDEV" ) || ( "$GATEWAYDEV" = "$interface" )) && ( -n "$GATEWAY" ) ]]; then
|
||||
routerSubnet=$(mask $GATEWAY $new_subnet_mask)
|
||||
mySubnet=$(mask $new_ip_address $new_subnet_mask)
|
||||
elif [[ (( -z "${GATEWAYDEV}" ) ||
|
||||
( "${GATEWAYDEV}" = "${interface}" )) &&
|
||||
( -n "${GATEWAY}" ) ]]; then
|
||||
routersubnet=$(mask ${GATEWAY} ${new_subnet_mask})
|
||||
mysubnet=$(mask ${new_ip_address} ${new_subnet_mask})
|
||||
|
||||
if [ "$routerSubnet" = "$mySubnet" ]; then
|
||||
/sbin/ip route replace default via $GATEWAY dev $interface
|
||||
if [ "${routersubnet}" = "${mysubnet}" ]; then
|
||||
ip route replace default via ${GATEWAY} dev ${interface}
|
||||
fi
|
||||
fi
|
||||
|
||||
# static routes
|
||||
if [ "x$new_static_routes" != x ]; then
|
||||
IFS=', ' static_routes=($new_static_routes)
|
||||
if [ -n "${new_static_routes}" ]; then
|
||||
IFS=', |' static_routes=(${new_static_routes})
|
||||
route_targets=()
|
||||
|
||||
for((i=0; i<${#static_routes[@]}; i+=2)); do
|
||||
@ -305,8 +287,8 @@ function dhconfig() {
|
||||
metric=''
|
||||
|
||||
for t in ${route_targets[@]}; do
|
||||
if [ $t == $target ]; then
|
||||
if [ -z "$metric" ]; then
|
||||
if [ ${t} = ${target} ]; then
|
||||
if [ -z "${metric}" ]; then
|
||||
metric=1
|
||||
else
|
||||
((metric=metric+1))
|
||||
@ -314,77 +296,81 @@ function dhconfig() {
|
||||
fi
|
||||
done
|
||||
|
||||
if [ -n "$metric" ]; then
|
||||
metric="metric $metric"
|
||||
if [ -n "${metric}" ]; then
|
||||
metric="metric ${metric}"
|
||||
fi
|
||||
|
||||
if routerReachable $gateway; then
|
||||
/sbin/ip route replace ${target}/$(class_bits $target) via ${gateway} dev $interface ${metric}
|
||||
if is_router_reachable ${gateway}; then
|
||||
ip route replace ${target}/$(class_bits ${target}) via ${gateway} dev ${interface} ${metric}
|
||||
|
||||
if [ $? -ne 0 ]; then
|
||||
/usr/bin/logger -p local7.notice -t 'NET' 'dhclient: failed to create static route:' ${target}/`class_bits $target` via ${gateway} dev $interface ${metric}
|
||||
logmessage "failed to create static route: ${target}/$(class_bits ${target}) via ${gateway} dev ${interface} ${metric}"
|
||||
else
|
||||
route_targets=(${route_targets[@]} $target)
|
||||
route_targets=(${route_targets[@]} ${target})
|
||||
fi
|
||||
fi
|
||||
done
|
||||
fi
|
||||
fi
|
||||
|
||||
if [ x$new_ip_address != x$alias_ip_address ] && [ x$alias_ip_address != x ]; then
|
||||
ifconfig $interface:0- inet 0
|
||||
ifconfig $interface:0 inet $alias_ip_address $alias_subnet_arg
|
||||
/sbin/ip route replace ${alias_ip_address}/32 dev $interface:0
|
||||
if [ ! "${new_ip_address}" = "${alias_ip_address}" ] &&
|
||||
[ -n "${alias_ip_address}" ]; then
|
||||
ip -family inet addr flush dev ${interface}:0
|
||||
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 $new_host_name
|
||||
if [ -n "${new_host_name}" ] && need_hostname; then
|
||||
hostname ${new_host_name}
|
||||
fi
|
||||
|
||||
if [ "${PEERNIS}" = no ]; then
|
||||
:
|
||||
elif [ -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 [ ! "${PEERNIS}" = "no" ]; then
|
||||
if [ -n "${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 $I" >> /etc/yp.conf
|
||||
if [ -n "${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
|
||||
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
|
||||
if [ $contents -gt 0 ]; then
|
||||
if [ -x /etc/rc.d/init.d/ypbind ] &&
|
||||
[ -r /var/run/ypbind.pid ]; then
|
||||
server ypbind restart >/dev/null 2>&1
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
|
||||
if [ -n "$DHCP_TIME_OFFSET_SETS_TIMEZONE" ] && [[ "$DHCP_TIME_OFFSET_SETS_TIMEZONE" = [yY1]* ]]; then
|
||||
if [ -n "$new_time_offset" ]; then
|
||||
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
|
||||
@ -397,180 +383,217 @@ function dhconfig() {
|
||||
((hoursWest*=-1))
|
||||
fi
|
||||
|
||||
tzfile=/usr/share/zoneinfo/Etc/GMT$(printf '%+d' $hoursWest)
|
||||
if [ -e $tzfile ]; then
|
||||
/bin/mv -f /etc/localtime /etc/localtime.predhclient.$interface
|
||||
/bin/cp -fp $tzfile /etc/localtime
|
||||
/bin/touch /etc/localtime
|
||||
tzfile=/usr/share/zoneinfo/Etc/GMT$(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 ]; then
|
||||
:
|
||||
elif [ -n "$new_ntp_servers" ] && [ -e /etc/ntp.conf ]; then
|
||||
if [ ! "${PEERNTP}" = "no" ] &&
|
||||
[ -n "${new_ntp_servers}" ] && [ -e /etc/ntp.conf ]; then
|
||||
save_previous /etc/ntp.conf
|
||||
/bin/egrep -v '^server .* # added by /sbin/dhclient-script$'< /etc/ntp.conf.predhclient.$interface > /etc/ntp.conf
|
||||
if [ -x /sbin/restorecon ]; then
|
||||
/sbin/restorecon /etc/ntp.conf >/dev/null 2>&1
|
||||
fi
|
||||
egrep -v '^server .* # added by /sbin/dhclient-script$'< ${SAVEDIR}/ntp.conf.predhclient.${interface} > /etc/ntp.conf
|
||||
restorecon /etc/ntp.conf >/dev/null 2>&1
|
||||
|
||||
for s in $new_ntp_servers; do
|
||||
echo "server $s # added by /sbin/dhclient-script" >> /etc/ntp.conf
|
||||
for s in ${new_ntp_servers} ; do
|
||||
echo "server ${s} # added by /sbin/dhclient-script" >> /etc/ntp.conf
|
||||
done
|
||||
|
||||
if [ -x /usr/bin/diff ] && /usr/bin/diff -q /etc/ntp.conf /etc/ntp.conf.predhclient.$interface >/dev/null 2>&1; then
|
||||
:
|
||||
else
|
||||
/sbin/service ntpd condrestart >/dev/null 2>&1
|
||||
diff -q /etc/ntp.conf ${SAVEDIR}/ntp.conf.predhclient.${interface} >/dev/null 2>&1
|
||||
if [ $? -eq 1 ]; then
|
||||
service ntpd condrestart >/dev/null 2>&1
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
if [ x$new_broadcast_address != x ] && [ x$new_subnet_mask != x ] && [ "$new_subnet_mask" != "255.255.255.255" ]; then
|
||||
new_broadcast_arg="broadcast $new_broadcast_address"
|
||||
fi
|
||||
|
||||
if [ x$old_broadcast_address != x ]; then
|
||||
old_broadcast_arg="broadcast $old_broadcast_address"
|
||||
fi
|
||||
#
|
||||
# ### MAIN
|
||||
#
|
||||
|
||||
if [ x$new_subnet_mask != x ]; then
|
||||
new_subnet_arg="netmask $new_subnet_mask"
|
||||
fi
|
||||
if [ -x /etc/dhclient-enter-hooks ]; then
|
||||
exit_status=0
|
||||
|
||||
if [ x$old_subnet_mask != x ]; then
|
||||
old_subnet_arg="netmask $old_subnet_mask"
|
||||
fi
|
||||
|
||||
if [ x$alias_subnet_mask != x ]; then
|
||||
alias_subnet_arg="netmask $alias_subnet_mask"
|
||||
fi
|
||||
|
||||
if [ x$reason = xMEDIUM ]; then
|
||||
# Linux doesn't do mediums (ok, ok, media).
|
||||
exit_with_hooks 0
|
||||
fi
|
||||
|
||||
added_old_broadcast_route=0
|
||||
if [ x$reason = xPREINIT ]; then
|
||||
if [ x$alias_ip_address != x ]; then
|
||||
# Bring down alias interface. Its routes will disappear too.
|
||||
ifconfig $interface:0- inet 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 ${exit_status}
|
||||
fi
|
||||
}
|
||||
|
||||
if [ x$keep_old_ip = xyes ]; then
|
||||
ifconfig $interface up
|
||||
elif [ $relmajor -lt 2 ] || ( [ $relmajor -eq 2 ] && [ $relminor -eq 0 ] ) then
|
||||
ifconfig $interface inet 0.0.0.0 netmask 0.0.0.0 broadcast 255.255.255.255 up
|
||||
# Add route to make broadcast work. Do not omit netmask.
|
||||
/sbin/ip route replace default dev $interface && added_old_broadcast_route=1
|
||||
else
|
||||
ifconfig $interface 0 up
|
||||
fi
|
||||
|
||||
# We need to give the kernel some time to get the interface up.
|
||||
# sleep 1
|
||||
# I don't think this is necessary with modern kernels - no problems found
|
||||
# during testing - JVD, 2005-06-17
|
||||
# but just in case:
|
||||
if [ -n "$DHCLIENT_DELAY" ] && [ "$DHCLIENT_DELAY" -gt 0 ] ; then
|
||||
sleep $DHCLIENT_DELAY
|
||||
fi
|
||||
|
||||
exit_with_hooks 0
|
||||
if [ ! -r /etc/sysconfig/network-scripts/network-functions ]; then
|
||||
echo "Missing /etc/sysconfig/network-scripts/network-functions, exiting." >&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
if [ x$reason = xARPCHECK ] || [ x$reason = xARPSEND ]; then
|
||||
if [ -z "$new_ip_address" ] || [ -z "$interface" ] || /sbin/arping -q -f -c 2 -w 3 -D -I ${interface} ${new_ip_address}; then
|
||||
if [ ! -r /etc/rc.d/init.d/functions ]; then
|
||||
echo "Missing /etc/rc.d/init.d/functions, exiting." >&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
. /etc/sysconfig/network-scripts/network-functions
|
||||
. /etc/rc.d/init.d/functions
|
||||
|
||||
if [ -f /etc/sysconfig/network ]; then
|
||||
. /etc/sysconfig/network
|
||||
fi
|
||||
|
||||
if [ -f /etc/sysconfig/networking/network ]; then
|
||||
. /etc/sysconfig/networking/network
|
||||
fi
|
||||
|
||||
CONFIG="${interface}"
|
||||
need_config ${CONFIG}
|
||||
|
||||
if [ -f "${CONFIG}" ]; then
|
||||
source_config
|
||||
else
|
||||
echo "${0}: configuration for ${interface} not found. Continuing with defaults." >&2
|
||||
fi
|
||||
|
||||
source_config
|
||||
|
||||
if [ -n "${new_subnet_mask}" ]; then
|
||||
new_prefix="$(ipcalc -p ${new_ip_address} ${new_subnet_mask} | cut -d '=' -f 2)"
|
||||
fi
|
||||
|
||||
if [ -n "${old_subnet_mask}" ]; then
|
||||
old_prefix="$(ipcalc -p ${old_ip_address} ${new_subnet_mask} | cut -d '=' -f 2)"
|
||||
fi
|
||||
|
||||
if [ -n "${alias_subnet_mask}" ]; then
|
||||
alias_prefix="$(ipcalc -p ${alias_ip_address} ${alias_subnet_mask} | cut -d '=' -f 2)"
|
||||
fi
|
||||
|
||||
case "${reason}" in
|
||||
MEDIUM)
|
||||
# Linux doesn't handle mediums (media)
|
||||
exit_with_hooks 0
|
||||
else
|
||||
exit_with_hooks 1
|
||||
fi
|
||||
fi
|
||||
;;
|
||||
|
||||
if [ x$reason = xBOUND ] || [ x$reason = xRENEW ] || \
|
||||
[ x$reason = xREBIND ] || [ x$reason = xREBOOT ]; then
|
||||
dhconfig
|
||||
exit_with_hooks 0
|
||||
fi
|
||||
|
||||
if [ x$reason = xEXPIRE ] || [ x$reason = xFAIL ] || [ x$reason = xRELEASE ] \
|
||||
|| [ x$reason = xSTOP ]; then
|
||||
# only restore config files if there are no other dhclient processes
|
||||
# running (#306381)
|
||||
any_other_clients="$(/bin/ps -eo pid,ppid,comm | /bin/grep dhclient | /bin/grep -v $PPID)"
|
||||
if [ -n "$any_other_clients" ]; then
|
||||
if [ -f /etc/resolv.conf.predhclient.$interface ]; then
|
||||
change_resolv_conf /etc/resolv.conf.predhclient.$interface
|
||||
rm -f /etc/resolv.conf.predhclient.$interface
|
||||
PREINIT)
|
||||
if [ -n "${alias_ip_address}" ]; then
|
||||
# Bring down alias interface, its routes will disappear too.
|
||||
ip -family inet link set ${interface}:0 down
|
||||
fi
|
||||
|
||||
if [ -n "$DHCP_TIME_OFFSET_SETS_TIMEZONE" ] && [[ "$DHCP_TIME_OFFSET_SETS_TIMEZONE" = [yY1]* ]]; then
|
||||
if [ -e /etc/localtime.predhclient.$interface ]; then
|
||||
/bin/rm -f /etc/localtime
|
||||
/bin/mv -f /etc/localtime.predhclient.$interface /etc/localtime
|
||||
/bin/touch /etc/localtime
|
||||
fi
|
||||
if [ "${keep_old_ip}" = "yes" ]; then
|
||||
ip -family inet link set ${interface} up
|
||||
else
|
||||
ip -family inet addr flush dev ${interface}
|
||||
ip -family inet link set ${interface} up
|
||||
fi
|
||||
|
||||
if [ -f /etc/ntp.conf.predhclient.$interface ]; then
|
||||
/bin/rm -f /etc/ntp.conf
|
||||
/bin/mv -f /etc/ntp.conf.predhclient.$interface /etc/ntp.conf
|
||||
service ntpd condrestart >/dev/null 2>&1
|
||||
if [ -n "${DHCLIENT_DELAY}" ] && [ ${DHCLIENT_DELAY} -gt 0 ]; then
|
||||
sleep ${DHCLIENT_DELAY}
|
||||
fi
|
||||
|
||||
if [ -f /etc/yp.conf.predhclient.$interface ]; then
|
||||
/bin/rm -f /etc/yp.conf
|
||||
/bin/mv -f /etc/yp.conf.predhclient.$interface /etc/yp.conf
|
||||
exit_with_hooks 0
|
||||
;;
|
||||
|
||||
if [ -x /etc/rc.d/init.d/ypbind ] && [ -r /var/run/ypbind.pid ]; then
|
||||
service ypbind restart >/dev/null 2>&1
|
||||
fi
|
||||
ARPCHECK|ARPSEND)
|
||||
if [ -z "${new_ip_address}" ] || [ -z "${interface}" ] ||
|
||||
arping -q -f -c 2 -w 3 -D -I ${interface} ${new_ip_address}; then
|
||||
exit_with_hooks 0
|
||||
else
|
||||
exit_with_hooks 1
|
||||
fi
|
||||
fi
|
||||
;;
|
||||
|
||||
if [ -x /etc/dhclient-${interface}-down-hooks ]; then
|
||||
. /etc/dhclient-${interface}-down-hooks
|
||||
elif [ -x /etc/dhclient-down-hooks ]; then
|
||||
. /etc/dhclient-down-hooks
|
||||
fi
|
||||
|
||||
if [ x$alias_ip_address != x ]; then
|
||||
# Turn off alias interface.
|
||||
ifconfig $interface:0- inet 0
|
||||
fi
|
||||
|
||||
if [ x$old_ip_address != x ]; then
|
||||
# Shut down interface, which will delete routes and clear arp cache.
|
||||
ifconfig $interface inet 0 down
|
||||
fi
|
||||
|
||||
if [ x$alias_ip_address != x ]; then
|
||||
ifconfig $interface:0 inet $alias_ip_address $alias_subnet_arg
|
||||
/sbin/ip route replace ${alias_ip_address}/32 $interface:0
|
||||
fi
|
||||
|
||||
exit_with_hooks 0
|
||||
fi
|
||||
|
||||
if [ x$reason = xTIMEOUT ] && [ "x$new_routers" != 'x' ]; then
|
||||
if [ x$alias_ip_address != x ]; then
|
||||
ifconfig $interface:0- inet 0
|
||||
fi
|
||||
|
||||
ifconfig $interface inet $new_ip_address $new_subnet_arg $new_broadcast_arg
|
||||
set $new_routers
|
||||
|
||||
if ping -q -c 1 -w 10 -I $interface $1; then
|
||||
BOUND|RENEW|REBIND|REBOOT)
|
||||
dhconfig
|
||||
exit_with_hooks 0
|
||||
fi
|
||||
;;
|
||||
|
||||
ifconfig $interface inet 0 down
|
||||
exit_with_hooks 1
|
||||
elif [ x$reason = xTIMEOUT ]; then
|
||||
exit_with_hooks 1
|
||||
fi
|
||||
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}
|
||||
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
|
||||
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}
|
||||
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
|
||||
|
||||
Loading…
Reference in New Issue
Block a user