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|
#!/bin/sh
#
# $Id: freebsd,v 1.24 2011/05/18 19:55:44 sar Exp $
#
# $FreeBSD$
if [ -x /usr/bin/logger ]; then
LOGGER="/usr/bin/logger -s -p user.notice -t dhclient"
else
LOGGER=echo
fi
make_resolv_conf() {
if [ x"$new_domain_name_servers" != x ]; then
( cat /dev/null > /etc/resolv.conf.dhclient )
exit_status=$?
if [ $exit_status -ne 0 ]; then
$LOGGER "Unable to create /etc/resolv.conf.dhclient: Error $exit_status"
else
if [ "x$new_domain_search" != x ]; then
( echo search $new_domain_search >> /etc/resolv.conf.dhclient )
exit_status=$?
elif [ "x$new_domain_name" != x ]; then
# Note that the DHCP 'Domain Name Option' is really just a domain
# name, and that this practice of using the domain name option as
# a search path is both nonstandard and deprecated.
( echo search $new_domain_name >> /etc/resolv.conf.dhclient )
exit_status=$?
fi
for nameserver in $new_domain_name_servers; do
if [ $exit_status -ne 0 ]; then
break
fi
( echo nameserver $nameserver >>/etc/resolv.conf.dhclient )
exit_status=$?
done
# If there were no errors, attempt to mv the new file into place.
if [ $exit_status -eq 0 ]; then
( mv /etc/resolv.conf.dhclient /etc/resolv.conf )
exit_status=$?
fi
if [ $exit_status -ne 0 ]; then
$LOGGER "Error while writing new /etc/resolv.conf."
fi
fi
elif [ "x${new_dhcp6_name_servers}" != x ] ; then
( cat /dev/null > /etc/resolv.conf.dhclient6 )
exit_status=$?
if [ $exit_status -ne 0 ] ; then
$LOGGER "Unable to create /etc/resolv.conf.dhclient6: Error $exit_status"
else
if [ "x${new_dhcp6_domain_search}" != x ] ; then
( echo search ${new_dhcp6_domain_search} >> /etc/resolv.conf.dhclient6 )
exit_status=$?
fi
for nameserver in ${new_dhcp6_name_servers} ; do
if [ $exit_status -ne 0 ] ; then
break
fi
# If the nameserver has a link-local address
# add a <zone_id> (interface name) to it.
case $nameserver in
fe80:*) zone_id="%$interface";;
FE80:*) zone_id="%$interface";;
*) zone_id="";;
esac
( echo nameserver ${nameserver}$zone_id >> /etc/resolv.conf.dhclient6 )
exit_status=$?
done
if [ $exit_status -eq 0 ] ; then
( mv /etc/resolv.conf.dhclient6 /etc/resolv.conf )
exit_status=$?
fi
if [ $exit_status -ne 0 ] ; then
$LOGGER "Error while writing new /etc/resolv.conf."
fi
fi
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 $exit_status
fi
fi
if [ x$new_network_number != x ]; then
$LOGGER New Network Number: $new_network_number
fi
if [ x$new_broadcast_address != x ]; then
$LOGGER New Broadcast Address: $new_broadcast_address
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_netmask_arg="netmask $new_subnet_mask"
fi
if [ x$old_subnet_mask != x ]; then
old_netmask_arg="netmask $old_subnet_mask"
fi
if [ x$alias_subnet_mask != x ]; then
alias_subnet_arg="netmask $alias_subnet_mask"
fi
if [ x$new_interface_mtu != x ]; then
mtu_arg="mtu $new_interface_mtu"
fi
if [ x$IF_METRIC != x ]; then
metric_arg="metric $IF_METRIC"
fi
if [ x$reason = xMEDIUM ]; then
eval "ifconfig $interface $medium"
eval "ifconfig $interface inet -alias 0.0.0.0 $medium" >/dev/null 2>&1
sleep 1
exit_with_hooks 0
fi
###
### DHCPv4 Handlers
###
if [ x$reason = xPREINIT ]; then
if [ x$alias_ip_address != x ]; then
ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
fi
ifconfig $interface inet 0.0.0.0 netmask 0.0.0.0 \
broadcast 255.255.255.255 up
exit_with_hooks 0
fi
if [ x$reason = xARPCHECK ] || [ x$reason = xARPSEND ]; then
exit_with_hooks 0;
fi
if [ x$reason = xBOUND ] || [ x$reason = xRENEW ] || \
[ x$reason = xREBIND ] || [ x$reason = xREBOOT ]; then
current_hostname=`/bin/hostname`
if [ x$current_hostname = x ] || \
[ x$current_hostname = x$old_host_name ]; then
if [ x$current_hostname = x ] || \
[ x$new_host_name != x$old_host_name ]; then
$LOGGER "New Hostname: $new_host_name"
hostname $new_host_name
fi
fi
if [ x$old_ip_address != x ] && [ x$alias_ip_address != x ] && \
[ x$alias_ip_address != x$old_ip_address ]; then
ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
fi
if [ x$old_ip_address != x ] && [ x$old_ip_address != x$new_ip_address ]
then
eval "ifconfig $interface inet -alias $old_ip_address $medium"
route delete $old_ip_address 127.1 >/dev/null 2>&1
for router in $old_routers; do
route delete default $router >/dev/null 2>&1
done
if [ -n "$old_static_routes" ]; then
set -- $old_static_routes
while [ $# -gt 1 ]; do
route delete $1 $2
shift; shift
done
fi
arp -n -a | sed -n -e 's/^.*(\(.*\)) at .*$/arp -d \1/p' |sh
fi
if [ x$old_ip_address = x ] || [ x$old_ip_address != x$new_ip_address ] || \
[ x$reason = xBOUND ] || [ x$reason = xREBOOT ]; then
eval "ifconfig $interface inet $new_ip_address $new_netmask_arg \
$new_broadcast_arg $mtu_arg $metric_arg $medium"
$LOGGER "New IP Address ($interface): $new_ip_address"
$LOGGER "New Subnet Mask ($interface): $new_subnet_mask"
$LOGGER "New Broadcast Address ($interface): $new_broadcast_address"
if [ -n "$new_routers" ]; then
$LOGGER "New Routers: $new_routers"
fi
route add $new_ip_address 127.1 >/dev/null 2>&1
for router in $new_routers; do
# If the subnet is captive, eg the netmask is /32 but the default
# gateway is (obviously) outside of this, then we need to produce a
# host route to reach the gateway.
if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
route add -host $router -interface $interface
fi
route add default $router >/dev/null 2>&1
done
if [ -n "$new_static_routes" ]; then
$LOGGER "New Static Routes: $new_static_routes"
set -- $new_static_routes
while [ $# -gt 1 ]; do
route add $1 $2
shift; shift
done
fi
else
# we haven't changed the address, have we changed other options
# that we wish to update?
if [ x$new_routers != x ] && [ x$new_routers != x$old_routers ] ; then
# if we've changed routers delete the old and add the new.
$LOGGER "New Routers: $new_routers"
for router in $old_routers; do
route delete default $router >/dev/null 2>&1
done
for router in $new_routers; do
# If the subnet is captive, eg the netmask is /32 but the default
# gateway is (obviously) outside of this, then we need to produce a
# host route to reach the gateway.
if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
route add -host $router -interface $interface
fi
route add default $router >/dev/null 2>&1
done
fi
fi
if [ x$new_ip_address != x$alias_ip_address ] && [ x$alias_ip_address != x ];
then
ifconfig $interface inet alias $alias_ip_address $alias_subnet_arg
route add $alias_ip_address 127.0.0.1
fi
make_resolv_conf
exit_with_hooks 0
fi
if [ x$reason = xEXPIRE ] || [ x$reason = xFAIL ] || [ x$reason = xRELEASE ] \
|| [ x$reason = xSTOP ]; then
if [ x$alias_ip_address != x ]; then
ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
fi
if [ x$old_ip_address != x ]; then
eval "ifconfig $interface inet -alias $old_ip_address $medium"
route delete $old_ip_address 127.1 >/dev/null 2>&1
for router in $old_routers; do
route delete default $router >/dev/null 2>&1
done
if [ -n "$old_static_routes" ]; then
set -- $old_static_routes
while [ $# -gt 1 ]; do
route delete $1 $2
shift; shift
done
fi
arp -n -a | sed -n -e 's/^.*(\(.*\)) at .*$/arp -d \1/p' \
|sh >/dev/null 2>&1
fi
if [ x$alias_ip_address != x ]; then
ifconfig $interface inet alias $alias_ip_address $alias_subnet_arg
route add $alias_ip_address 127.0.0.1
fi
exit_with_hooks 0
fi
if [ x$reason = xTIMEOUT ]; then
if [ x$alias_ip_address != x ]; then
ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
fi
eval "ifconfig $interface inet $new_ip_address $new_netmask_arg \
$new_broadcast_arg $mtu_arg $metric_arg $medium"
$LOGGER "New IP Address ($interface): $new_ip_address"
$LOGGER "New Subnet Mask ($interface): $new_subnet_mask"
$LOGGER "New Broadcast Address ($interface): $new_broadcast_address"
sleep 1
if [ -n "$new_routers" ]; then
$LOGGER "New Routers: $new_routers"
set -- $new_routers
if ping -q -c 1 $1; then
if [ x$new_ip_address != x$alias_ip_address ] && \
[ x$alias_ip_address != x ]; then
ifconfig $interface inet alias $alias_ip_address $alias_subnet_arg
route add $alias_ip_address 127.0.0.1
fi
route add $new_ip_address 127.1 >/dev/null 2>&1
for router in $new_routers; do
if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
route add -host $router -interface $interface
fi
route add default $router >/dev/null 2>&1
done
set -- $new_static_routes
while [ $# -gt 1 ]; do
route add $1 $2
shift; shift
done
make_resolv_conf
exit_with_hooks 0
fi
fi
eval "ifconfig $interface inet -alias $new_ip_address $medium"
for router in $old_routers; do
route delete default $router >/dev/null 2>&1
done
if [ -n "$old_static_routes" ]; then
set -- $old_static_routes
while [ $# -gt 1 ]; do
route delete $1 $2
shift; shift
done
fi
arp -n -a | sed -n -e 's/^.*(\(.*\)) at .*$/arp -d \1/p' \
|sh >/dev/null 2>&1
exit_with_hooks 1
fi
###
### DHCPv6 Handlers
###
if [ ${reason} = PREINIT6 ] ; then
# Ensure interface is up.
ifconfig ${interface} up
# XXX: Remove any stale addresses from aborted clients.
# We need to give the kernel some time to active interface
interface_up_wait_time=5
for i in $(seq 0 ${interface_up_wait_time})
do
ifconfig ${interface} | grep inactive >/dev/null 2>&1
if [ $? -ne 0 ]; then
break;
fi
sleep 1
done
# Wait for duplicate address detection for this interface if the
# --dad-wait-time parameter has been specified and is greater than
# zero.
if [ ${dad_wait_time} -gt 0 ]; then
# Check if any IPv6 address on this interface is marked as
# tentative.
ifconfig ${interface} | grep inet6 | grep tentative \
>/dev/null 2>&1
if [ $? -eq 0 ]; then
# Wait for duplicate address detection to complete or for
# the timeout specified as --dad-wait-time.
for i in $(seq 0 $dad_wait_time)
do
# We're going to poll for the tentative flag every second.
sleep 1
ifconfig ${interface} | grep inet6 | grep tentative \
>/dev/null 2>&1
if [ $? -ne 0 ]; then
break;
fi
done
fi
fi
exit_with_hooks 0
fi
if [ x${old_ip6_prefix} != x ] || [ x${new_ip6_prefix} != x ] ; then
echo Prefix ${reason} old=${old_ip6_prefix} new=${new_ip6_prefix}
exit_with_hooks 0
fi
if [ ${reason} = BOUND6 ] ; then
if [ x${new_ip6_address} = x ] || [ x${new_ip6_prefixlen} = x ] ; then
exit_with_hooks 2;
fi
ifconfig ${interface} inet6 ${new_ip6_address}/${new_ip6_prefixlen} alias
# Check for nameserver options.
make_resolv_conf
exit_with_hooks 0
fi
if [ ${reason} = RENEW6 ] || [ ${reason} = REBIND6 ] ; then
# Make sure nothing has moved around on us.
# Nameservers/domains/etc.
if [ "x${new_dhcp6_name_servers}" != "x${old_dhcp6_name_servers}" ] ||
[ "x${new_dhcp6_domain_search}" != "x${old_dhcp6_domain_search}" ] ; then
make_resolv_conf
fi
exit_with_hooks 0
fi
if [ ${reason} = DEPREF6 ] ; then
if [ x${new_ip6_address} = x ] ; then
exit_with_hooks 2;
fi
ifconfig ${interface} inet6 ${new_ip6_address} deprecated
exit_with_hooks 0
fi
if [ ${reason} = EXPIRE6 -o ${reason} = RELEASE6 -o ${reason} = STOP6 ] ; then
if [ x${old_ip6_address} = x ] || [ x${old_ip6_prefixlen} = x ] ; then
exit_with_hooks 2;
fi
ifconfig ${interface} inet6 ${old_ip6_address}/${old_ip6_prefixlen} -alias
exit_with_hooks 0
fi
exit_with_hooks 0
|