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348f524f0a
dhcp/dhclient-script
Marius Tomaschewski 348f524f0a - Applied contrib/ldap/dhcpd-conf-to-ldap patch by Ales Novak to 
reorder config to add all global options or option declarations
  to the dhcpService object instead to create new service object
  (bsc#886094,ISC-Bugs#37876).
  [+ dhcp-4.2.x-contrib-conf-to-ldap-reorder.886094.patch]
- Applied an upstream patch by Thomas Markwalder adding missed
  mapping of SHA TSIG algorithm names to their constants to enable
  hmac-sha1, hmac_sha224, hmac_sha256, hmac_sha384 and hmac_sha512
  authenticated dynamic DNS updates (bsc#890731, ISC-Bugs#36947).
  [+ dhcp-4.2.x-ddns-tsig-hmac-sha-support.890731.patch]
- Decline IPv6 addresses on Duplicate Address Detection failure
  and stop client message exchanges on reached MRD rather than
  at some point after it. Applied fedora patches by Jiri Popelka
  and added DAD reporting via exit 3 to the dhclient-script and
  a fix to use correct address variables in the DEPREF6 action
  (bsc#872609,ISC-Bugs#26735,ISC-Bugs#21238).
  [+ dhcp-4.2.x-dhcpv6-decline-on-DAD-failure.872609.patch,
   + dhcp-4.2.x-dhcpv6-retransmission-until-MRD.872609.patch]
- Applied backport patch by William Preston avoiding to bind ddns
  socket in the server when ddns-update-style is none (bsc#891655).
  [+ dhcp-4.2.x-disable-unused-ddns-port-in-server.891655.patch]
- Applied patch for the contrib/ldap/dhcpd-conf-to-ldap script
  fixing subclass statement handling (bnc#878846,[ISC-Bugs #36409])
  [+ dhcp-4.2.4-P2-bnc878846-conf-to-ldap.patch]
- Updated licence statement and FSF address in our scripts.
- Added missed service_add_pre macro calls for dhcrelay services

OBS-URL: https://build.opensuse.org/package/show/network:dhcp/dhcp?expand=0&rev=141
2014-11-21 11:33:30 +00:00

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#!/bin/bash
#
# Copyright (C) 2010-2013 SUSE LINUX Products GmbH / Novell Inc.
# Copyright (C) 2013-2014 SUSE LINUX GmbH
#
# 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: Marius Tomaschewski <mt@suse.de>
#
# /sbin/dhclient-script for openSUSE / SUSE Linux Enterprise Server
# based on the scripts shipped with the ISC DHCP (4.1.1) client.
#
# Note:
# It is used by sysconfig alias netcontrol alias ifup-dhcp,
# but not by the NetworkManager that is using an own script.
#
# Wicked is using an another dhcp client (runtime conflict).
# As sysconfig-network is gone on sles12 and opensuse > 13.1,
# this script is obsolete and unsupported.
#
##
## check mandatory parameters or ignore & exit
##
test "x$reason" = x -o "x$interface" = x && exit 1
#
# source sysconfig functions
#
SYSCONFIG_CFG_DIR="/etc/sysconfig/network"
if test -f "$SYSCONFIG_CFG_DIR/scripts/functions" ; then
. "$SYSCONFIG_CFG_DIR/scripts/functions"
fi
SYSCONFIG_RUN_DIR=${SYSCONFIG_RUN_DIR:-/dev/.sysconfig/network}
#
# Debugging:
# logs entire run of dhclient-script to /var/log/${dhclient}-script.*.log,
# when DHCLIENT_DEBUG/DHCLIENT6_DEBUG are "yes" in sysconfig/network/dhcp
#
eval `grep '^DHCLIENT6\?_DEBUG=' "$SYSCONFIG_CFG_DIR/dhcp" 2>/dev/null`
case $reason in
*6) DEBUG=$DHCLIENT6_DEBUG ; dhclient=dhclient6 ; ipver=6 ;;
*) DEBUG=$DHCLIENT_DEBUG ; dhclient=dhclient ; ipver=4 ;;
esac
if [ "$DEBUG" = yes ]; then
set -a # allexport
(
echo '****************'
echo "$0 $*"
date
echo '----------------'
env
echo '----------------'
) >> /var/log/${dhclient}-script.$interface.log
exec 2>> /var/log/${dhclient}-script.$interface.log
set +a
set -x
fi
network_service_conflicts()
{
local _id=`/usr/bin/systemctl --no-pager -p Id show network.service 2>/dev/null`
case "${_id#Id=}" in
# wicked is using an another dhcp client
wicked.service) return 1 ;;
# NetworkManager is using another script
#NetworkManager.service) return 1 ;;
# sysconfig network were using it, other?
network.service|*) return 0 ;;
esac
}
network_service_conflicts || exit 1
is_ifup_controlled()
{
test -f "$SYSCONFIG_RUN_DIR/if-${interface}"
}
# netconfig makes all "additional" modifications as DNS or NTP
netconfig_modify() {
if test -x /sbin/netconfig -a -n "$interface" ; then
{
echo "INTERFACE='$interface'"
for v in ${!new_*}; do
case $ipver in
6)
case $v in
(new_ip6_address) k='IPADDR' ;;
(new_ip6_prefixlen) k='PREFIXLEN' ;;
(new_dhcp6_client_id) k='DHCP6CID' ;;
(new_dhcp6_server_id) k='DHCP6SID' ;;
(new_dhcp6_domain_search) k='DNSSEARCH' ;;
(new_dhcp6_name_servers) k='DNSSERVERS' ;;
(new_dhcp6_sntp_servers) k='NTPSERVERS' ;;
#(new_dhcp6_nis_domain) k='NISDOMAIN' ;;
#(new_dhcp6_nis_servers) k='NISSERVERS' ;;
(*) k="dhclient6_${v#new_}" ;;
esac
;;
4)
case $v in
(new_ip_address) k='IPADDR' ;;
(new_subnet_mask) k='NETMASK' ;;
(new_network_number) k='NETWORK' ;;
(new_broadcast_address) k='BROADCAST' ;;
(new_interface_mtu) k='MTU' ;;
(new_rfc3442_classless_static_routes_formatted)
k='ROUTES' ;;
# (new_static_routes) k='ROUTES' ;;
(new_routers) k='GATEWAYS' ;;
(new_host_name) k='HOSTNAME' ;;
(new_domain_search) k='DNSSEARCH' ;;
(new_domain_name) k='DNSDOMAIN' ;;
(new_domain_name_servers) k='DNSSERVERS' ;;
(new_ntp_servers) k='NTPSERVERS' ;;
(new_nis_domain) k='NISDOMAIN' ;;
(new_nis_servers) k='NISSERVERS' ;;
(new_root_path) k='ROOTPATH' ;;
(new_dhcp_server_identifier)k='DHCPSID' ;;
(new_lpr_servers) k='LPRSERVER' ;;
(new_log_servers) k='LOGSERVER' ;;
(new_netbios_dd_server) k='NETBIOSDDSERVER' ;;
(new_netbios_name_servers) k='NETBIOSNAMESERVER' ;;
(new_netbios_node_type) k='NETBIOSNODETYPE' ;;
(new_netbios_scope) k='NETBIOSSCOPE' ;;
(*) k="dhclient_${v#new_}" ;;
esac
esac
[ "k${k}" != k ] && echo "${k}='${!v}'"
done
} | /sbin/netconfig modify -s "dhclient$ipver" -i "$interface"
fi
}
netconfig_remove() {
if test -x /sbin/netconfig -a -n "$interface" ; then
/sbin/netconfig remove -s "dhclient$ipver" -i "$interface" </dev/null
fi
}
prefixlen2netmask()
{
test -n "$1" || return 1
local o i n=0 adr=() len=$(($1))
for o in 0 1 2 3; do
adr[$o]=0
for i in 128 64 32 16 8 4 2 1; do
((n++ < len)) && \
((adr[$o] = ${adr[$o]} + $i))
done
done
echo ${adr[0]}.${adr[1]}.${adr[2]}.${adr[3]}
return 0
}
parse_ipv4_classless_routes()
{
local route_regex='^[0-9]{1,3}([ ][0-9]{1,3}){4,}$'
local rfc_routes=() _routes=()
# check whether it is a list of numbers
[[ $* =~ $route_regex ]] && rfc_routes=($*)
for (( i=0; i < ${#rfc_routes[@]}; )) ; do
net_length=${rfc_routes[$i]}
test $net_length -gt 32 && return 1
((i++))
net_octets=$(($net_length / 8 + ($net_length % 8 ? 1 : 0)))
test ${#rfc_routes[@]} -lt $(( $i + $net_octets + 4 )) && \
return 1
net_netmask=$(prefixlen2netmask $net_length)
net_netmask=(${net_netmask//./ })
net_address=(0 0 0 0)
for(( j=0; j < $net_octets; j++, i++)); do
net_address[$j]=$((${rfc_routes[$i]} & ${net_netmask[$j]}))
done
gateway=(0 0 0 0)
for (( j=0; j < 4; j++, i++ )); do
gateway[$j]=${rfc_routes[$i]}
done
old_IFS=$IFS
IFS='.'
_routes+=("${net_address[*]},${net_netmask[*]},${gateway[*]}")
IFS=$old_IFS
done
echo "${_routes[*]}"
return 0
}
set_ipv4_route()
{
local dest=$1 ; shift
local mask=$1 ; shift
local gate=("$@")
local hops args
hops=()
if [ ${#gate[@]} -gt 1 ] ; then
for((g=0; g<${#gate[@]}; g++)) ; do
hops+=(nexthop ${gate[$g]:+via ${gate[$g]}}
dev $interface weight $((g+1)))
done
elif [ ${#gate[@]} -gt 0 ] ; then
hops+=(${gate[$g]:+via ${gate[$g]}} dev $interface)
fi
[ ${#hops[@]} -eq 0 ] && hops=(dev $interface)
args=("$dest${mask:+/$mask}" $metric_arg ${hops[*]})
err=`LC_ALL=C /sbin/ip route replace ${args[*]} 2>&1` && return 0
case $err in
RTNETLINK*answers:*File*exists) ;;
RTNETLINK*answers:*No*such*process)
#
# The gateway seems to be not reachable via local network
# route (implicitly created by ifconfig based on the IP
# and netmask provided by dhcp).
# Check this, set an explicit host route to the gateway
# over the current interface and try again (bnc#266215).
#
retry=0
for router in ${gate[@]} ; do
matches=$(/sbin/ip -f inet -o route list match $router | \
grep -v ^default | grep -c -v "^$" 2>/dev/null)
if [ -n "$matches" -a $(($matches)) -eq 0 ] ; then
LC_ALL=C /sbin/ip route add $router/32 dev $interface || retry=1
fi
done
if [ $retry -eq 0 ] ; then
LC_ALL=C /sbin/ip route replace ${args[*]} && return 0
fi
;;
esac
return 1
}
get_ipv4_default_gw()
{
if [ "x$new_rfc3442_classless_static_routes_formatted" != x ] ; then
local r route=() gw=()
for r in $new_rfc3442_classless_static_routes_formatted ; do
route=(${r//,/ })
case ${route[0]}/${route[1]} in
0.0.0.0/0.0.0.0)
[ "x${route[2]}" = "x0.0.0.0" ] || \
gw+=(${route[2]})
;;
esac
done
echo "${gw[*]}"
elif [ "$new_routers" != x ] ; then
echo "$new_routers"
fi
}
set_ipv4_routes()
{
if [ "x$new_rfc3442_classless_static_routes_formatted" != x ] ; then
local r route=()
# TODO: multiple gw's to one dest as in $new_routers?
for r in $new_rfc3442_classless_static_routes_formatted ; do
route=(${r//,/ })
case ${route[0]}/${route[1]} in
0.0.0.0/0.0.0.0)
[ "x$DHCLIENT_SET_DEFAULT_ROUTE" = xyes ] || continue ;;
esac
set_ipv4_route ${route[*]}
done
elif [ "$new_routers" != x ] ; then
if [ "x$DHCLIENT_SET_DEFAULT_ROUTE" = xyes ] ; then
set_ipv4_route default "" $new_routers
fi
fi
}
set_hostname()
{
rx_host='^[[:alnum:]][[:alnum:]_-]{0,62}$'
if [ "$DHCLIENT_SET_HOSTNAME" = yes ] ; then
new_host_name="${new_host_name%%.*}"
[[ ${new_host_name} =~ ${rx_host} ]] || unset new_host_name
current_hostname=`hostname`
current_hostname="${current_hostname%%.*}"
[[ ${current_hostname} =~ ${rx_host} ]] || unset current_hostname
if [ "x${current_hostname}" = "x" ] || \
[ "x${current_hostname}" = "xlocalhost" ] || \
[ "x${current_hostname}" != "x${new_host_name}" ]; then
if [ "x${new_host_name}" != "x" ]; then
hostname "${new_host_name}"
else
if [ -x /usr/bin/host ] ; then
if out=`host -W 2 "$new_ip_address" 2>/dev/null` ; then
_hostname="`echo "$out" | sed 's:^.* ::; s:\..*::; s:.*[)]::'`"
[[ ${_hostname} =~ ${rx_host} ]] || unset _hostname
if [ "x${_hostname}" != "x" -a \
"x${_hostname}" != "x${current_hostname}" ]; then
hostname "${_hostname}"
fi
fi
fi
fi
fi
fi
if is_ifup_controlled ; then
# check regardless the DHCLIENT_SET_HOSTNAME setting
# and whether we've set it above or not, because when
# it changed, we've to handle it anyway...
local OLD_HOSTNAME=`read_cached_config_data hostname $interface`
local CUR_HOSTNAME=`hostname 2>/dev/null`
CUR_HOSTNAME="${CUR_HOSTNAME%%.*}"
if [[ ${CUR_HOSTNAME} =~ ${rx_host} ]] && \
[ "x$OLD_HOSTNAME" != "x$CUR_HOSTNAME" ] ; then
write_cached_config_data hostname "$CUR_HOSTNAME" $interface
commit_cached_config_data $interface
# reload syslog so it knows the new hostname
if test -x /usr/bin/systemctl ; then
/usr/bin/systemctl reload syslog.service
else
/etc/init.d/syslog reload
fi
fi
fi
}
dhcp6_dad_check()
{
local ifname="$1" word i
local ipaddr="$2"
local noaddr=1 nodad=0 tentative=0 dadfailed=0
test -n "$ifname" -a -n "$ipaddr" || return 1
while read -a word ; do
test "${word[0]}" != "inet6" && continue
noaddr=0
for((i=2; i<${#word[@]}; ++i)) ; do
case ${word[$i]} in
nodad) nodad=1 ;;
tentative) tentative=1 ;;
dadfailed) dadfailed=1 ;;
flags) ((i++))
rx='^[[:xdigit:]]+$'
[[ "${word[$i]}" =~ $rx ]] || continue
hx="0x${word[$i]}"
((hx & 0x02)) && nodad=1
((hx & 0x08)) && dadfailed=1
((hx & 0x40)) && tentative=1
;;
esac
done
((nodad)) && continue
((dadfailed)) && return 3
((tentative)) && return 2
done < <(LC_ALL=C ip -6 addr show dev "${ifname}" to "${ipaddr}" 2>/dev/null)
# on dad failure of dynamic (non-persistent) address,
# the kernel deletes dad failed addresses
# that is, the address is tentative (2) and vanishes
# (4) and is not visible as dadfailed (3).
((noaddr)) && return 4 || return 0
}
dhcp6_dad_wait()
{
local ifname="$1"
local ipaddr="$2"
local -i wsecs=${3:-0}
local -i uwait=25000
local -i loops=$(((wsecs * 1000000) / uwait))
local -i loop=0 ret=0
dhcp6_dad_check "$ifname" "$ipaddr" ; ret=$?
while ((ret == 2 && loop++ < loops)) ; do
usleep $uwait
dhcp6_dad_check "$ifname" "$ipaddr" ; ret=$?
done
return $ret
}
# 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
case $dhclient in
dhclient)
if is_ifup_controlled ; then
# STARTMODE
eval `grep --no-filename \
'^[[:space:]]*STARTMODE=' \
"$SYSCONFIG_CFG_DIR/ifcfg-${interface}" 2>/dev/null`
tmp_startmode=`read_cached_config_data startmode $INTERFACE`
[ -n "$tmp_startmode" ] && STARTMODE="$tmp_startmode"
# DHCLIENT_SET_HOSTNAME and DHCLIENT_SET_DEFAULT_ROUTE
if grep -qs '^primary=yes' "$SYSCONFIG_RUN_DIR/if-${interface}" 2>/dev/null ;
then
eval `grep --no-filename \
'^[[:space:]]*DHCLIENT_SET_\(HOSTNAME\|DEFAULT_ROUTE\)=' \
"$SYSCONFIG_CFG_DIR/dhcp" \
"$SYSCONFIG_CFG_DIR/ifcfg-${interface}" 2>/dev/null`
else
eval `grep --no-filename \
'^[[:space:]]*DHCLIENT_SET_\(HOSTNAME\|DEFAULT_ROUTE\)=' \
"$SYSCONFIG_CFG_DIR/ifcfg-${interface}" 2>/dev/null`
fi
else
STARTMODE=manual
eval `grep --no-filename \
'^[[:space:]]*DHCLIENT_SET_\(HOSTNAME\|DEFAULT_ROUTE\)=' \
"$SYSCONFIG_CFG_DIR/dhcp" 2>/dev/null`
fi
if [ "x$new_rfc3442_classless_static_routes" != x ] ; then
new_rfc3442_classless_static_routes_formatted=$(
parse_ipv4_classless_routes $new_rfc3442_classless_static_routes
)
else
unset new_rfc3442_classless_static_routes_formatted
fi
if [ x$new_broadcast_address != x ] ; then
new_broadcast_arg="brd $new_broadcast_address"
elif [ "x$new_subnet_mask" != "x255.255.255.255" ] ; then
new_broadcast_arg="brd +"
fi
if [ x$new_interface_mtu != x -a \
$(( $new_interface_mtu )) -le 576 ] ;
then
# 68 is the minimal legal value, but 576 the real life minimum
unset new_interface_mtu
fi
if [ x$IF_METRIC != x ]; then
metric_arg="metric $IF_METRIC"
fi
;;
dhclient6)
if is_ifup_controlled ; then
# STARTMODE
eval `grep --no-filename \
'^[[:space:]]*STARTMODE=' \
"$SYSCONFIG_CFG_DIR/ifcfg-${interface}" 2>/dev/null`
tmp_startmode=`read_cached_config_data startmode $INTERFACE`
[ -n "$tmp_startmode" ] && STARTMODE="$tmp_startmode"
else
STARTMODE=manual
fi
;;
esac
case $reason in
######################################################################
## DHCPv4 #
######################################################################
MEDIUM)
####################################################################
exit_with_hooks 0
;;
PREINIT)
####################################################################
if [ "x$alias_ip_address" != x ]; then
/sbin/ip addr del $alias_ip_address/$alias_subnet_mask dev $interface
fi
if [ "x$STARTMODE" != "xnfsroot" ] ; then
/sbin/ip -4 addr flush dev $interface
fi
/sbin/ip link set $interface up
# We need to give the kernel some time to get the interface up.
sleep 1
exit_with_hooks 0
;;
ARPCHECK|ARPSEND)
####################################################################
exit_with_hooks 0
;;
BOUND|RENEW|REBIND|REBOOT)
####################################################################
if [ x$alias_ip_address != x -a x$alias_ip_address != x$old_ip_address -a \
x$new_ip_address != x$old_ip_address ] ;
then
# Possible new alias. Remove old alias.
/sbin/ip addr del $alias_ip_address/$alias_subnet_mask dev $interface
fi
if [ x$old_ip_address != x -a x$old_ip_address != x$new_ip_address ]; then
# IP address changed. Flush to clear routes and ARP cache.
if [ "x$STARTMODE" != "xnfsroot" ] ; then
/sbin/ip -4 addr flush dev $interface
fi
fi
if [ x$new_interface_mtu != x ] ; then
/sbin/ip link set $interface mtu $new_interface_mtu
fi
if [ x$new_ip_address != x ] && \
[ x$new_ip_address != x$old_ip_address -o \
x$reason = xBOUND -o x$reason = xREBOOT ]; then
/sbin/ip addr add $new_ip_address/${new_subnet_mask:-32} \
${new_broadcast_arg} \
dev $interface
set_ipv4_routes
fi
if [ x$new_ip_address != x$alias_ip_address -a x$alias_ip_address != x \
-a x$new_ip_address != x$old_ip_address ];
then
/sbin/ip addr add $alias_ip_address/$alias_subnet_mask \
dev $interface
fi
netconfig_modify
if [ x$old_ip_address != x -a x$old_ip_address != x$new_ip_address ]; then
if is_ifup_controlled ; then
ifdown $interface -o dhcp
write_cached_config_data dhcp4_state "up" $interface
commit_cached_config_data $interface
fi
else
if is_ifup_controlled ; then
write_cached_config_data dhcp4_state "new" $interface
commit_cached_config_data $interface
fi
fi
set_hostname
if is_ifup_controlled ; then
# execute ifservice and if-up.d scripts
ifup $interface -o dhcp
write_cached_config_data dhcp4_state "complete" $interface
commit_cached_config_data $interface
fi
exit_with_hooks 0
;;
EXPIRE|FAIL|RELEASE|STOP)
####################################################################
if [ x$old_ip_address != x ]; then
if [ "x$STARTMODE" != "xnfsroot" ] ; then
/sbin/ip -4 addr flush dev $interface
fi
fi
if [ x$alias_ip_address != x ]; then
/sbin/ip addr add $alias_ip_address/$alias_subnet_mask \
dev $interface
fi
if is_ifup_controlled ; then
write_cached_config_data dhcp4_state "down" $interface
commit_cached_config_data $interface
fi
netconfig_remove
exit_with_hooks 0
;;
TIMEOUT)
####################################################################
if [ x$alias_ip_address != x ]; then
/sbin/ip addr del $alias_ip_address/$alias_subnet_mask \
dev $interface
fi
if [ x$new_ip_address != x -a x$old_ip_address != x$new_ip_address ];
then
/sbin/ip addr add $new_ip_address/${new_subnet_mask:-32} \
${new_broadcast_arg} \
dev $interface
set -- $(get_ipv4_default_gw)
if [ -n "$1" ] && /sbin/arping -q -c 1 -w 5 -I $interface $1 ;
then
if [ x$new_ip_address != x$alias_ip_address ] && \
[ x$alias_ip_address != x ]; then
/sbin/ip addr add $alias_ip_address/$alias_subnet_arg
fi
set_ipv4_routes
netconfig_modify
set_hostname
if is_ifup_controlled ; then
# execute ifservice and if-up.d scripts
ifup $interface -o dhcp
write_cached_config_data dhcp4_state "complete" $interface
commit_cached_config_data $interface
fi
exit_with_hooks 0
else
if [ x$old_ip_address != x ]; then
if [ "x$STARTMODE" != "xnfsroot" ] ; then
/sbin/ip -4 addr flush dev $interface
fi
fi
if is_ifup_controlled ; then
write_cached_config_data dhcp4_state "down" $interface
commit_cached_config_data $interface
fi
netconfig_remove
exit_with_hooks 1
fi
fi
;;
######################################################################
## DHCPv6 #
######################################################################
PREINIT6)
####################################################################
if [ "x$STARTMODE" != "xnfsroot" ] ; then
/sbin/ip -6 addr flush dev $interface scope global permanent
fi
/sbin/ip link set $interface up
# We need to give the kernel some time to get the interface up.
sleep 1
exit_with_hooks 0
;;
BOUND6|RENEW6|REBIND6|REBOOT6)
####################################################################
if [ x$old_ip6_address != x -a x$old_ip6_address != x$new_ip6_address ];
then
/sbin/ip addr del "$old_ip6_address/$old_ip6_prefixlen" dev $interface
if is_ifup_controlled ; then
write_cached_config_data dhcp6_state "up" $interface
commit_cached_config_data $interface
fi
else
if is_ifup_controlled ; then
write_cached_config_data dhcp6_state "new" $interface
commit_cached_config_data $interface
fi
fi
if [ "x$new_ip6_address" != x -a "x$new_ip6_prefixlen" != x ] ; then
/sbin/ip addr replace "$new_ip6_address/$new_ip6_prefixlen" \
scope global dev $interface \
${new_max_life:+valid_lft $new_max_life} \
${new_preferred_life:+preferred_lft $new_preferred_life} \
|| exit_with_hooks 2
echo >&2 "Checking DAD results for $new_ip6_address"
if ! dhcp6_dad_wait "$interface" "$new_ip6_address/$new_ip6_prefixlen" 5 ; then
/sbin/ip addr del "$new_ip6_address/$new_ip6_prefixlen" dev $interface 2>/dev/null
exit_with_hooks 3
fi
fi
netconfig_modify
if [ x$old_ip6_address != x -a x$old_ip6_address != x$new_ip6_address ];
then
if is_ifup_controlled ; then
/sbin/ifdown $interface -o dhcp
fi
fi
#set_hostname
if is_ifup_controlled ; then
# execute ifservice and if-up.d scripts
/sbin/ifup $interface -o dhcp
write_cached_config_data dhcp6_state "complete" $interface
commit_cached_config_data $interface
fi
exit_with_hooks 0
;;
DEPREF6)
####################################################################
if [ x$cur_ip6_address = x -o x$cur_ip6_prefixlen = x ] ; then
exit_with_hooks 2
fi
/sbin/ip addr change "$cur_ip6_address/$cur_ip6_prefixlen" \
dev $interface scope global preferred_lft 0
exit_with_hooks 0
;;
EXPIRE6|RELEASE6|STOP6)
####################################################################
if [ x$old_ip6_address != x -a x$old_ip6_prefixlen != x ] ; then
/sbin/ip addr del "$old_ip6_address/$old_ip6_prefixlen" \
dev $interface
fi
if is_ifup_controlled ; then
write_cached_config_data dhcp6_state "down" $interface
commit_cached_config_data $interface
fi
netconfig_remove
exit_with_hooks 0
;;
esac
exit_with_hooks 0
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