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15b63fa83b
From a post that I dug up from Brooks: Why on earth are you exiting with $1 as the status? This is almost certainly the problem. You should not exit from dhclient-exit-hooks at all since it occurs in the context of dhclient-script and this exit values is entirely bogus.
305 lines
8.3 KiB
Bash
Executable File
305 lines
8.3 KiB
Bash
Executable File
#!/bin/sh
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# $Id$
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# $OpenBSD: dhclient-script,v 1.6 2004/05/06 18:22:41 claudio Exp $
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# $FreeBSD: src/sbin/dhclient/dhclient-script,v 1.4 2005/06/10 03:41:18 brooks Exp $
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#
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# Copyright (c) 2003 Kenneth R Westerback <krw@openbsd.org>
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#
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# Permission to use, copy, modify, and distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#
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NETSTAT=/usr/bin/netstat
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GREP=/usr/bin/grep
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AWK=/usr/bin/awk
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HOSTNAME=/bin/hostname
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GREP=/usr/bin/grep
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ROUTE=/sbin/route
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SED=/usr/bin/sed
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ARP=/usr/sbin/arp
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IFCONFIG=/sbin/ifconfig
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LOCALHOST=127.0.0.1
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# Ensure check_reload_status is running at all times.
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#PS_COUNT=`ps awux | grep -v grep | grep check_reload_status | wc -l`
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#if [ $PS_COUNT -lt 1 ]; then
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# echo "check_reload_status not running, restarting." | logger -p daemon.info -i -t dhclient-script
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# /usr/bin/nice -n20 /usr/local/sbin/check_reload_status 2>/dev/null
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#fi
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if [ -x /usr/bin/logger ]; then
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LOGGER="/usr/bin/logger -s -p user.notice -t dhclient"
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else
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LOGGER=echo
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fi
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#
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# Helper functions that implement common actions.
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#
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check_hostname() {
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current_hostname=`$HOSTNAME`
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if [ -z "$current_hostname" ]; then
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$LOGGER "New Hostname ($interface): $new_host_name"
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$HOSTNAME $new_host_name
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elif [ "$current_hostname" = "$old_host_name" -a \
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"$new_host_name" != "$old_host_name" ]; then
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$LOGGER "New Hostname ($interface): $new_host_name"
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$HOSTNAME $new_host_name
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fi
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}
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arp_flush() {
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$ARP -an -i $interface | \
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$SED -n -e 's/^.*(\(.*\)) at .*$/arp -d \1/p' | \
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/bin/sh >/dev/null 2>&1
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}
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delete_old_address() {
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$IFCONFIG $interface inet -alias $old_ip_address $medium
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}
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add_new_address() {
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# Kill off old pftpx process.
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kill `ps awux | grep "pftpx -b" | grep -v grep | grep $old_ip_address | cut -d" " -f5`
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$IFCONFIG $interface \
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inet $new_ip_address \
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netmask $new_subnet_mask \
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broadcast $new_broadcast_address \
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$medium
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$LOGGER "New IP Address ($interface): $new_ip_address"
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$LOGGER "New Subnet Mask ($interface): $new_subnet_mask"
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$LOGGER "New Broadcast Address ($interface): $new_broadcast_address"
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$LOGGER "New Routers ($interface): $new_routers"
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echo $new_routers > /tmp/${interface}_router
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echo $new_ip_address > /var/db/${interface}_ip
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}
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delete_old_alias() {
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if [ -n "$alias_ip_address" ]; then
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$IFCONFIG $interface inet -alias $alias_ip_address > /dev/null 2>&1
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$ROUTE delete $alias_ip_address $LOCALHOST > /dev/null 2>&1
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fi
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}
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add_new_alias() {
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if [ -n "$alias_ip_address" ]; then
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$IFCONFIG $interface inet alias $alias_ip_address netmask \
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$alias_subnet_mask
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$ROUTE add $alias_ip_address $LOCALHOST
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fi
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}
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delete_old_routes() {
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$ROUTE delete "$old_ip_address" $LOCALHOST >/dev/null 2>&1
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# Only allow the default route to be overridden if it's on our own interface
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DEFAULTROUTE_IFACE=`route get default | grep interface | awk '{print $2};'`
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if [ -z "${DEFAULTROUTE_IFACE}" -o "{$interface}" = "${DEFAULTROUTE_IFACE}" ]; then
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for router in $old_routers; do
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if [ $if_defaultroute = x -o $if_defaultroute = $interface ]; then
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$ROUTE delete default $route >/dev/null 2>&1
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/bin/rm -f /tmp/${interface}_router
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fi
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done
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fi
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if [ -n "$old_static_routes" ]; then
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set $old_static_routes
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while [ $# -gt 1 ]; do
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$ROUTE delete "$1" "$2"
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shift; shift
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/bin/rm -f /tmp/${interface}_router
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done
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fi
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arp_flush
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}
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add_new_routes() {
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$ROUTE add $new_ip_address $LOCALHOST >/dev/null 2>&1
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# Only allow the default route to be overridden if it's on our own interface
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DEFAULTROUTE_IFACE=`route get default | grep interface | awk '{print $2};'`
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if [ -z "${DEFAULTROUTE_IFACE}" -o "{$interface}" = "${DEFAULTROUTE_IFACE}" ]; then
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for router in $new_routers; do
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if [ "$new_ip_address" = "$router" ]; then
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$ROUTE add default -iface $router
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#>/dev/null 2>&1
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echo $ROUTE add default -iface $router | $LOGGER
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echo $new_routers > /tmp/${interface}_router
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else
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$ROUTE add default $router
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echo $ROUTE add default $router | $LOGGER
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#>/dev/null 2>&1
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echo $new_routers > /tmp/${interface}_router
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fi
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# 2nd and subsequent default routers error out, so explicitly
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# stop processing the list after the first one.
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break
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done
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fi
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if [ -n "$new_static_routes" ]; then
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$LOGGER "New Static Routes ($interface): $new_static_routes"
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set $new_static_routes
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while [ $# -gt 1 ]; do
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$ROUTE add $1 $2
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shift; shift
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echo $new_routers > /tmp/${interface}_router
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done
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fi
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# last ditch effort if no route exists.
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DEFAULTROUTE=`$NETSTAT -rn | $GREP default`
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if [ -z "${DEFAULTROUTE}" ]; then
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$ROUTE add default -iface $interface
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fi
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}
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add_new_resolv_conf() {
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/bin/rm -f /var/etc/nameservers.conf
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if [ ! -f "/var/etc/nameserver_$interface" ]; then
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# Make sure file exists to avoid errors
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touch /var/etc/nameserver_$interface
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fi
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if [ -n "$new_domain_name_servers" ]; then
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# Remove old entries
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for nameserver in `cat /var/etc/nameserver_$interface`; do
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route delete $nameserver
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done
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rm -f /var/etc/nameserver_$interface
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for nameserver in $new_domain_name_servers; do
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echo $nameserver >>/var/etc/nameservers.conf
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# Add a route to the nameserver out the correct interface
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# so that mulitple wans work correctly with multiple dns
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# also backup the nameserver for later route removal
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echo $nameserver >>/var/etc/nameserver_$interface
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route add $nameserver -if $interface
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done
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echo $new_domain_name >/var/etc/defaultdomain.conf
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fi
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return 0
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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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echo $interface > /tmp/rc.newwanip
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echo $old_ip_address > /tmp/rc.newwanip_oldip
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}
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#
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# Start of active code.
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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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if [ -x $NETSTAT ]; then
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if_defaulroute=`$NETSTAT -rn | $GREP "^default" | $AWK '{print $6}'`
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else
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if_defaultroute="x"
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fi
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case $reason in
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MEDIUM)
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$IFCONFIG $interface $medium
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$IFCONFIG $interface inet -alias 0.0.0.0 $medium >/dev/null 2>&1
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/bin/sleep 1
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;;
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PREINIT)
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delete_old_alias
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$IFCONFIG $interface inet 0.0.0.0 netmask 0.0.0.0 broadcast 255.255.255.255 up
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/bin/rm -f /tmp/${interface}_router
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;;
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ARPCHECK|ARPSEND)
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;;
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BOUND|RENEW|REBIND|REBOOT)
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check_hostname
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if [ -n "$old_ip_address" ]; then
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if [ "$old_ip_address" != "$alias_ip_address" ]; then
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delete_old_alias
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fi
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if [ "$old_ip_address" != "$new_ip_address" ]; then
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delete_old_address
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delete_old_routes
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fi
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fi
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if [ "$reason" = BOUND ] || \
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[ "$reason" = REBOOT ] || \
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[ -z "$old_ip_address" ] || \
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[ "$old_ip_address" != "$new_ip_address" ]; then
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add_new_address
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add_new_routes
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fi
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if [ "$new_ip_address" != "$alias_ip_address" ]; then
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add_new_alias
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fi
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add_new_resolv_conf
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;;
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EXPIRE|FAIL)
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delete_old_alias
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if [ -n "$old_ip_address" ]; then
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delete_old_address
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delete_old_routes
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fi
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# XXX Why add alias we just deleted above?
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add_new_alias
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if [ -f /var/etc/resolv.conf.save ]; then
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#cat /var/etc/resolv.conf.save > /var/etc/resolv.conf
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fi
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;;
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TIMEOUT)
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delete_old_alias
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add_new_address
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/bin/sleep 1
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if [ -n "$new_routers" ]; then
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$LOGGER "New Routers ($interface): $new_routers"
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set "$new_routers"
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if /sbin/ping -q -c 1 -w 1 "$1"; then
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if [ "$new_ip_address" != "$alias_ip_address" ]; then
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add_new_alias
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fi
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add_new_routes
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if add_new_resolv_conf; then
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exit_with_hooks
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fi
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fi
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fi
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$IFCONFIG $interface inet -alias $new_ip_address $medium
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delete_old_routes
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exit_with_hooks
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;;
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esac
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exit_with_hooks 0
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