giskard wrote: > Il giorno mar, 10/10/2006 alle 12.17 +0200, Michael Biebl ha scritto: > ciao Michael, > >> Hi Ricardo, >> >> do you know, why we need this script at all, what is it good for? > > if dhclient is called with this arg: > > 31: turns off ALL actions and dhclient-script just writes > options to dhcdbd > > we want it because dhcdbd should handle this. > > yes, i'm wondering why there is the 'exit 0' > >
I fear, it's not quite clear for you (and me) yet, how dhclient and
dhcdbd interact. I attached the Redhat version of the dhclient-script.
At the beginning, there is this dbus call to dhcdbd, where dhclient
"asks" dhcdbd what actions it should perform and stores the answer in
the variable dhc_dbus.
If the answer is 31, it basically means, let dhcdbd handle everything
and exit immediately (exit 0).
The other options are
0: (default) the script runs as normal, just sending all the
DHCP options to dhcdbd
1: turns off modification of resolv.conf
2: turns off all ifconfig actions
4: turns off all route modification actions
8: turns off configuration of yp server
16: turns off configuration of ntp server
These values can be "or"ed and are stored in dhc_dbus.
Depending on the value of dhc_dbus, /sbin/dhclient-script will perform
certain actions or not, just grep for the variable name in the attached
shell script.
Asking dhcdbd in /etc/dhcp3/dhclient-exit-hooks.d/dhcdbd, what actions
should be performed or not, makes no sense, as dhclient-script was
already run. The call should be at the beginning of the dhclient-script
call and dhclient-script should be patched to react accordingly to the
value of dhc_dbus.
Maybe you remember the bug reporter, who complained that the calling
dbus-send with option 1 (do not modify resolv.conf) did not work.
Now it's clear to me, why it didnt, our /sbin/dhclient-script in Debian
is simply not patched, to support that.
We should adapt dhcp-3.0.3-dhclient-script-dhcdbd.patch (taken from the
redhat package) for the Debian /sbin/dhclient-script and send it to the
maintainer of the dhcp3-client package.
Cheers,
Michael
--
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?
#!/bin/bash
# dhclient-script for Linux. Dan Halbert, March, 1997.
# Updated for Linux 2.[12] by Brian J. Murrell, January 1999.
# No guarantees about this. I'm a novice at the details of Linux
# networking.
# Notes:
# 0. This script is based on the netbsd script supplied with dhcp-970306.
# 1. ifconfig down apparently deletes all relevant routes and flushes
# the arp cache, so this doesn't need to be done explicitly.
# 2. The alias address handling here has not been tested AT ALL.
# I'm just going by the doc of modern Linux ip aliasing, which uses
# notations like eth0:0, eth0:1, for each alias.
# 3. I have to calculate the network address, and calculate the broadcast
# address if it is not supplied. This might be much more easily done
# by the dhclient C code, and passed on.
if [ -n "${dhc_dbus}" ]; then
/bin/dbus-send \
--system \
--dest=com.redhat.dhcp \
--type=method_call \
/com/redhat/dhcp/$interface \
com.redhat.dhcp.set \
'string:'"`env | /bin/egrep -v '^(PATH|SHLVL|_|PWD|dhc_dbus)\='`";
if (( ( dhc_dbus & 31 ) == 31 )); then
exit 0;
fi;
fi;
function save_previous() {
if [ -e $1 ]; then
/bin/mv $1 $1.predhclient
else
echo ''> $1.predhclient
fi
}
make_resolv_conf() {
if [ "${PEERDNS}" == "no" ]; then
return
fi
if [ x$reason == xRENEW ] &&
[ "$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" ]; then
cp -fp /etc/resolv.conf /etc/resolv.conf.predhclient
rscf=`mktemp /tmp/XXXXXX`;
echo '; generated by /sbin/dhclient-script' > $rscf
if [ -n "$SEARCH" ]; then
echo search $SEARCH >> $rscf
else
if [ -n "$new_domain_name" ]; then
echo search $new_domain_name >> $rscf
fi
fi
for nameserver in $new_domain_name_servers; do
echo nameserver $nameserver >> $rscf
done
change_resolv_conf $rscf
rm -f $rscf
fi
}
# Must be used on exit. Invokes the local dhcp client exit hooks, if any.
exit_with_hooks() {
exit_status=$1
if [ -f /etc/dhclient-exit-hooks ]; then
. /etc/dhclient-exit-hooks
fi
# probably should do something with exit status of the local script
exit $exit_status
}
# Invoke the local dhcp client enter hooks, if they exist.
if [ -f /etc/dhclient-enter-hooks ]; then
exit_status=0
. /etc/dhclient-enter-hooks
# allow the local script to abort processing of this state
# local script must set exit_status variable to nonzero.
if [ $exit_status -ne 0 ]; then
exit $exit_status
fi
fi
# Import Red Hat Linux configuration
cd /etc/sysconfig/network-scripts;
. /etc/sysconfig/network-scripts/network-functions
. /etc/rc.d/init.d/functions
[ -f ../network ] && . ../network
[ -f ../networking/network ] && . ../networking/network
CONFIG=$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
release=`uname -r`
relmajor=`echo $release |/bin/cut -f1 -d'.'`
relminor=`echo $release |/bin/cut -f2 -d'.'`
# simple IP arithmetic functions:
function quad2num()
{
if [ $# -eq 4 ]; then
let n="$1<<24|$2<<16|$3<<8|$4"
echo $n;
return 0;
fi
echo '0';
return 1;
}
function ip2num()
{
IFS='.' quad2num $1;
}
function 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;
}
function mask()
{
ip=$1
m=$2
let ip=`IFS='.' ip2num $ip`;
let m=`IFS='.' ip2num $m`;
let n='ip&m';
num2ip $n;
}
function mask_bits()
{
ip=$1
let ip=`IFS='.' ip2num $ip`;
let bits=0
for ((bit=1; '((ip&bit)==0) && (bits < 32)'; 'bit<<=1')) do
let bits+=1
done
let n_bits=32-bits
echo $n_bits
}
function 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;
}
function routerReachable()
{ # Handle silly 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 /sbin/arping -f -q -I $interface -w2 $router; then
/sbin/ip route add ${router}/32 dev $interface
if [ $? -eq 0 ]; then
unreachable=0
else
/usr/bin/logger -p local7.notice -t "NET" "dhclient: failed to
create host route for unreachable router $router not on subnet $mySubnet";
fi
else
unreachable=1
if [ -x /usr/bin/logger ]; then
/usr/bin/logger -p local7.notice -t "NET" "dhclient: DHCP
router $router is unreachable on DHCP subnet $mySubnet router subnet
$routerSubnet";
fi;
fi;
fi;
return $unreachable;
}
function add_default_gateway()
{
router=$1
metric=''
if [ $# -gt 1 ] && [ "$2" -gt 0 ]; then
metric="metric $2";
fi;
if routerReachable $router ; then
/sbin/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 $metric;
return 1;
else
return 0;
fi;
fi;
return 1;
}
function dhconfig()
{
if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
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 $interface:0- inet 0
fi
if [ x$old_ip_address != x ] && [ x$old_ip_address != x$new_ip_address
]; then
# IP address changed. Bringing down the interface will delete all
routes,
# and clear the ARP cache.
ifconfig $interface inet 0 down
fi
fi
if [ x$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$new_interface_mtu ] ; then
if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); 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 $new_interface_mtu;
fi;
if [ -x /etc/dhclient-${interface}-up-hooks ]; then
. /etc/dhclient-${interface}-up-hooks;
elif [ -x /etc/dhclient-up-hooks ]; then
. /etc/dhclient-up-hooks;
fi;
fi;
if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 4 ) != 4 )); then
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};
default_routers=()
for router in $new_routers; do
added_router=0
for r in [EMAIL PROTECTED]; do
if [ "$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
continue;
fi;
default_routers=([EMAIL PROTECTED] $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
/sbin/ip route replace default via $GATEWAY dev $interface
fi;
fi;
# static routes
if [ "x$new_static_routes" != x ]; then
IFS=', ' static_routes=($new_static_routes)
route_targets=()
for((i=0; i<[EMAIL PROTECTED]; i+=2)); do
target=${static_routes[$i]}
gateway=${static_routes[$i+1]}
metric=''
for t in [EMAIL PROTECTED]; 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 routerReachable $gateway; then
/sbin/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};
else
route_targets=([EMAIL PROTECTED] $target);
fi;
fi;
done
fi
fi
fi
if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
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 $interface:0
fi
fi
if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 1 ) != 1 )); then
make_resolv_conf
if [ -n "$new_host_name" ] && need_hostname; then
hostname $new_host_name
fi
fi;
if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 8 ) != 8 )); then
if [ "${PEERNIS}" = no ]; then
:
elif [ -n "$new_nis_domain" ]; then
domainname "$new_nis_domain"
save_previous /etc/yp.conf
let contents=0
echo '# generated by /sbin/dhclient-script' > /etc/yp.conf
if [ -n "$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 $new_nis_domain broadcast" >> /etc/yp.conf
let contents=contents+1
fi
level=`/sbin/runlevel`
level=${level##*\ }
if [ "$level" = "unknown" ]; then
level=1;
fi
if [ $contents -gt 0 ] && [[ "$level" = [0-6] ]] && /sbin/chkconfig
--level=$level ypbind >/dev/null 2>&1 && [ -r /var/run/ypbind.pid ] &&
yppid=`cat /var/run/ypbind.pid` && [ -d /proc/${yppid} ] && [ "`if [ -x
/sbin/busybox ]; then /sbin/busybox readlink /proc/${yppid}/exe; else echo
/sbin/ypbind; fi`" = "/sbin/ypbind" ]; then
kill -HUP $yppid;
fi
elif [ -n "$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 $I" >> /etc/yp.conf
let contents=contents+1
done
level=`/sbin/runlevel`
level=${level##*\ }
if [ "$level" = "unknown" ]; then
level=1;
fi
if [ $contents -gt 0 ] && [[ "$level" = [0-6] ]] && /sbin/chkconfig
--level=$level ypbind >/dev/null 2>&1 && [ -r /var/run/ypbind.pid ] &&
yppid=`cat /var/run/ypbind.pid` && [ -d /proc/${yppid} ] && [ "`if [ -x
/sbin/busybox ]; then /sbin/busybox readlink /proc/${yppid}/exe; else echo
/sbin/ypbind; fi`" = "/sbin/ypbind" ] ; then
kill -HUP $yppid;
fi
fi
fi
if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 16 ) != 16 )); 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 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
/bin/mv -f /etc/localtime /etc/localtime.predhclient;
/bin/cp -fp $tzfile /etc/localtime;
/bin/touch /etc/localtime;
fi;
fi;
fi;
if [ "${PEERNTP}" = no ]; then
:
elif [ -n "$new_ntp_servers" ] && [ -e /etc/ntp.conf ]; then
save_previous /etc/ntp.conf
/bin/egrep -v '(^[\ \ ]*(server|fudge))|(generated by
/sbin/dhclient-script)'< /etc/ntp.conf.predhclient > /etc/ntp.conf
echo '# servers generated by /sbin/dhclient-script' >> /etc/ntp.conf
localClocks=(`/bin/egrep '^[\ \ ]*server[\ \ ]+127\.127'
/etc/ntp.conf.predhclient | while read s addr rest; do echo $addr; done`)
localClockFudge="`/bin/egrep '^[\ \ ]*fudge[\ \ ]+127\.127'
/etc/ntp.conf.predhclient`";
for s in $new_ntp_servers [EMAIL PROTECTED];
do
echo 'server '$s >> /etc/ntp.conf;
done
echo "$localClockFudge" >> /etc/ntp.conf;
if [ -e /etc/ntp/step-tickers ]; then
save_previous /etc/ntp/step-tickers
echo '' > /etc/ntp/step-tickers
for s in $new_ntp_servers [EMAIL PROTECTED];
do
echo $s >> /etc/ntp/step-tickers
done;
fi;
if [ -x /usr/bin/diff ] && /usr/bin/diff -q /etc/ntp.conf
/etc/ntp.conf.predhclient >/dev/null 2>&1; then
: ;
else
/sbin/service ntpd condrestart >/dev/null 2>&1
fi;
fi
fi;
}
if [ x$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 $old_broadcast_address"
fi
if [ x$new_subnet_mask != x ]; then
new_subnet_arg="netmask $new_subnet_mask"
fi
if [ x$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$reason = xPREINIT ]; then
if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
if [ x$alias_ip_address != x ]; then
# Bring down alias interface. Its routes will disappear too.
ifconfig $interface:0- inet 0
fi
if [ x$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 $DHCLIENT_DELAY;
fi;
exit_with_hooks 0
fi;
fi
if [ x$reason = xARPCHECK ] || [ x$reason = xARPSEND ]; then
if [ -z "$new_ip_address" ] || [ -z "$interface" ] || /sbin/arping -q -f
-c 2 -w 3 -D -I ${interface} ${new_ip_address}; then
exit_with_hooks 0
else
exit_with_hooks 1
fi;
fi
if [ x$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$reason = xSTOP ]; then
if [ -f /etc/resolv.conf.predhclient ]; then
change_resolv_conf /etc/resolv.conf.predhclient
rm -f /etc/resolv.conf.predhclient
fi
if [ -n "$DHCP_TIME_OFFSET_SETS_TIMEZONE" ] && [[
"$DHCP_TIME_OFFSET_SETS_TIMEZONE" = [yY1]* ]]; then
if [ -e /etc/localtime.predhclient ]; then
/bin/rm -f /etc/localtime
/bin/mv -f /etc/localtime.predhclient /etc/localtime;
/bin/touch /etc/localtime;
fi;
fi;
if [ -f /etc/ntp.conf.predhclient ]; then
/bin/rm -f /etc/ntp.conf
/bin/mv -f /etc/ntp.conf.predhclient /etc/ntp.conf
if [ -f /etc/ntp/step-tickers.predhclient ]; then
/bin/rm -f /etc/ntp/step-tickers
/bin/mv -f /etc/ntp/step-tickers.predhclient /etc/ntp/step-tickers;
fi
service ntpd condrestart >/dev/null 2>&1
fi
if [ -f /etc/yp.conf.predhclient ]; then
/bin/rm -f /etc/yp.conf
/bin/mv -f /etc/yp.conf.predhclient /etc/yp.conf
level=`/sbin/runlevel`
level=${level##*\ }
if [ "$level" = "unknown" ]; then
level=1;
fi
if [[ "$level" = [0-6] ]] && /sbin/chkconfig --level=$level ypbind
>/dev/null 2>&1 && [ -r /var/run/ypbind.pid ] && yppid=`cat
/var/run/ypbind.pid` && [ -d /proc/${yppid} ] && [ "`if [ -x /sbin/busybox ];
then /sbin/busybox readlink /proc/${yppid}/exe; else echo /sbin/ypbind; fi`" =
"/sbin/ypbind" ] ; then
kill -HUP $yppid;
fi
fi
if [ -x /etc/dhclient-${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$new_routers" != 'x' ]; then
if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); 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
fi;
set $new_routers
if ping -q -c 1 -w 10 -I $interface $1; then
dhconfig ;
exit_with_hooks 0
fi
if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
ifconfig $interface inet 0 down
fi;
exit_with_hooks 1
elif [ x$reason = xTIMEOUT ]; then
exit_with_hooks 1
fi
exit_with_hooks 0
--- a/client/scripts/linux
+++ b/client/scripts/linux
@@ -44,6 +44,20 @@
set -x
fi
+if [ -n "${dhc_dbus}" ]; then
+ /usr/bin/dbus-send \
+ --system \
+ --dest=com.redhat.dhcp \
+ --type=method_call \
+ /com/redhat/dhcp/$interface \
+ com.redhat.dhcp.set \
+ 'string:'"`env | /bin/egrep -v '^(PATH|SHLVL|_|PWD|dhc_dbus)\='`";
+ if (( ( dhc_dbus & 31 ) == 31 )); then
+ exit 0;
+ fi;
+fi;
+
+
make_resolv_conf() {
# first, look if we are allowed to modify resolv.conf:
eval `grep "^MODIFY_RESOLV_CONF_DYNAMICALLY=" /etc/sysconfig/network/config`
@@ -167,24 +181,26 @@
fi
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
- fi
- if [ $relmajor -lt 2 ] || ( [ $relmajor -eq 2 ] && [ $relminor -eq 0 ] )
- then
- ifconfig $interface inet 0.0.0.0 netmask 0.0.0.0 \
+ if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
+ if [ x$alias_ip_address != x ]; then
+ # Bring down alias interface. Its routes will disappear too.
+ ifconfig $interface:0- inet 0
+ fi
+ if [ $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.
- route add default dev $interface netmask 0.0.0.0
- else
- ifconfig $interface 0 up
- fi
+ # Add route to make broadcast work. Do not omit netmask.
+ route add default dev $interface netmask 0.0.0.0
+ else
+ ifconfig $interface 0 up
+ fi
- # We need to give the kernel some time to get the interface up.
- sleep 1
+ # We need to give the kernel some time to get the interface up.
+ sleep 1
- exit_with_hooks 0
+ exit_with_hooks 0
+ fi
fi
if [ x$reason = xARPCHECK ] || [ x$reason = xARPSEND ]; then
@@ -193,55 +209,65 @@
if [ x$reason = xBOUND ] || [ x$reason = xRENEW ] || \
[ x$reason = xREBIND ] || [ x$reason = xREBOOT ]; then
- if [ x$old_ip_address != x ] && [ x$alias_ip_address != x ] && \
+ if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
+ 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 $interface:0- inet 0
- fi
- if [ x$old_ip_address != x ] && [ x$old_ip_address != x$new_ip_address ]; then
- # IP address changed. Bringing down the interface will delete all routes,
- # and clear the ARP cache.
- ifconfig $interface inet 0 down
+ # Possible new alias. Remove old alias.
+ ifconfig $interface:0- inet 0
+ fi
+ if [ x$old_ip_address != x ] && [ x$old_ip_address != x$new_ip_address ]; then
+ # IP address changed. Bringing down the interface will delete all routes,
+ # and clear the ARP cache.
+ ifconfig $interface inet 0 down
+ fi
fi
if [ x$old_ip_address = x ] || [ x$old_ip_address != x$new_ip_address ] || \
[ x$reason = xBOUND ] || [ x$reason = xREBOOT ]; then
- ifconfig $interface inet $new_ip_address $new_subnet_arg \
+ if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
+ ifconfig $interface inet $new_ip_address $new_subnet_arg \
$new_broadcast_arg
- # Add a network route to the computed network address.
- if [ $relmajor -lt 2 ] || \
+ fi
+ if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 4 ) != 4 )); then
+ # Add a network route to the computed network address.
+ if [ $relmajor -lt 2 ] || \
( [ $relmajor -eq 2 ] && [ $relminor -eq 0 ] ); then
- route add -net $new_network_number $new_subnet_arg dev $interface
+ route add -net $new_network_number $new_subnet_arg dev $interface
+ fi
+ for router in $new_routers; do
+ route add default gw $router
+ done
fi
- for router in $new_routers; do
- route add default gw $router
- done
fi
- if [ x$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
- route add -host $alias_ip_address $interface:0
+ if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
+ 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
+ route add -host $alias_ip_address $interface:0
+ fi
fi
- make_resolv_conf
- eval `grep --no-filename "^DHCLIENT_SET_HOSTNAME=" /etc/sysconfig/network/dhcp`
- if [ "$DHCLIENT_SET_HOSTNAME" = yes ] ; then
-
- current_hostname=`hostname`
- if [ x$current_hostname = x ] || \
- [ x$current_hostname != x$new_host_name ]; then
-
- if [ x$new_host_name != x ]; then
- hostname $new_host_name
- else
- if [ -x /usr/bin/host ] ; then
- hostname `host "$new_ip_address" | sed 's:^.* ::; s:\..*::'`
+ if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 1 ) != 1 )); then
+ make_resolv_conf
+ eval `grep --no-filename "^DHCLIENT_SET_HOSTNAME=" /etc/sysconfig/network/dhcp`
+ if [ "$DHCLIENT_SET_HOSTNAME" = yes ] ; then
+
+ current_hostname=`hostname`
+ if [ x$current_hostname = x ] || \
+ [ x$current_hostname != x$new_host_name ]; then
+
+ if [ x$new_host_name != x ]; then
+ hostname $new_host_name
+ else
+ if [ -x /usr/bin/host ] ; then
+ hostname `host "$new_ip_address" | sed 's:^.* ::; s:\..*::'`
+ fi
fi
- fi
- fi
+ fi
+ fi
fi
exit_with_hooks 0
fi
signature.asc
Description: OpenPGP digital signature
