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6c0327f13f
It seems uncertain either to be a typo of $new_ip_address and $old_ip_address my test show that either cases it does more harm than good. For now remove it altogether since it causes strange issues and makes ipsec tunnels not work on the interface with the new address.
321 lines
8.6 KiB
Bash
Executable File
321 lines
8.6 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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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 $medium
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}
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add_new_address() {
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$LOGGER "Starting 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 $old_ip_address | cut -d" " -f5`
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$LOGGER "ifconfig $interface inet $new_ip_address netmask $new_subnet_mask broadcast $new_broadcast_address $medium"
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$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 $LOCALHOST
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fi
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}
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delete_old_routes() {
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$LOGGER "Deleting 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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$LOGGER "Adding 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 $interface
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fi
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}
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add_new_resolv_conf() {
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$LOGGER "Creating 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 $new_domain_name >/var/etc/defaultdomain.conf
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fi
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return 0
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}
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# Notify rc.newwanip of changes to an interface
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notify_rc_newwanip() {
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$LOGGER "notify_rc_newwanip()"
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echo $interface > /tmp/rc.newwanip
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echo $old_ip_address > /tmp/rc.newwanip_oldip
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}
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#
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# Start of active code.
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#
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# Invoke the local dhcp client enter hooks, if they exist.
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if [ -f /etc/dhclient-enter-hooks ]; then
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$LOGGER "dhclient-enter-hooks"
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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 $NETSTAT ]; then
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$LOGGER "netstat"
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if_defaultroute=`$NETSTAT -rn | $GREP "^default" | $AWK '{print $6}'`
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else
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$LOGGER "if_defaultroute"
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if_defaultroute="x"
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fi
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$LOGGER $reason
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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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changes=no
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if [ -n "$old_ip_address" ]; then
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if [ -n "$alias_ip_address" ] && \
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[ "$old_ip_address" != "$alias_ip_address" ]; then
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delete_old_alias
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changes=yes
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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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changes=yes
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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" != "$new_ip_address" ]; then
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add_new_address
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add_new_routes
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changes=yes
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fi
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if [ -n "$alias_ip_address" ] && \
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[ "$new_ip_address" != "$alias_ip_address" ]; then
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add_new_alias
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changes=yes
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fi
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add_new_resolv_conf
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if [ "$changes" = "yes" ] ; then
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notify_rc_newwanip
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fi
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;;
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EXPIRE|FAIL)
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delete_old_alias
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if [ -n "$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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;;
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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" != "$alias_ip_address" ]; then
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add_new_alias
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fi
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add_new_routes
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if add_new_resolv_conf; then
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notify_rc_newwanip
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fi
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fi
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fi
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$IFCONFIG $interface inet -alias $new_ip_address $medium
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delete_old_routes
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;;
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esac
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# Invoke the local dhcp client exit hooks, if they exist.
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if [ -f /etc/dhclient-exit-hooks ]; then
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$LOGGER "dhclient-exit-hooks"
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exit_status=0
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. /etc/dhclient-exit-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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exit $exit_status
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fi
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