3 # $OpenBSD: src/sbin/dhclient/dhclient-script,v 1.20 2011/04/04 11:29:51 krw Exp $
5 # Copyright (c) 2003 Kenneth R Westerback <krw@openbsd.org>
7 # Permission to use, copy, modify, and distribute this software for any
8 # purpose with or without fee is hereby granted, provided that the above
9 # copyright notice and this permission notice appear in all copies.
11 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 # Helper functions that implement common actions.
25 delete_old_address() {
26 if [ -n "$old_ip_address" ]; then
27 ifconfig $interface inet $old_ip_address delete
28 #route delete "$old_ip_address" 127.0.0.1 >/dev/null 2>&1
34 inet $new_ip_address \
35 netmask $new_subnet_mask \
36 broadcast $new_broadcast_address
38 # XXX Original TIMEOUT code did not do this unless $new_routers was set?
39 #route add $new_ip_address 127.0.0.1 >/dev/null 2>&1
43 if [ -n "$old_static_routes" ]; then
44 set $old_static_routes
45 while [ $# -gt 1 ]; do
46 route delete "$1" "$2"
55 for router in $new_routers; do
56 route -q delete default
57 if [ "$new_ip_address" = "$router" ]; then
58 route -q add default -iface $router
60 route -q add default $router
62 # 2nd and subsequent default routers error out, so explicitly
63 # stop processing the list after the first one.
67 if [ -n "$new_static_routes" ]; then
68 set $new_static_routes
69 while [ $# -gt 1 ]; do
76 add_new_resolv_conf() {
77 # Create resolv.conf when either $new_domain_name_servers or
78 # $new_domain_name are provided. As reported in PR#3135, some ISPs
79 # provide only $new_domain_name_servers.
81 rm -f /etc/resolv.conf.std
83 if [ -n "$new_domain_name" ]; then
84 echo "search $new_domain_name" >>/etc/resolv.conf.std
87 if [ -n "$new_domain_name_servers" ]; then
88 for nameserver in $new_domain_name_servers; do
89 echo "nameserver $nameserver" >>/etc/resolv.conf.std
93 if [ -f /etc/resolv.conf.std ]; then
94 if [ -f /etc/resolv.conf.tail ]; then
95 cat /etc/resolv.conf.tail >>/etc/resolv.conf.std
98 # In case (e.g. during OpenBSD installs) /etc/resolv.conf
99 # is a symbolic link, take care to preserve the link and write
100 # the new data in the correct location.
102 if [ -f /etc/resolv.conf ]; then
103 cat /etc/resolv.conf > /etc/resolv.conf.save
105 cat /etc/resolv.conf.std > /etc/resolv.conf
106 rm -f /etc/resolv.conf.std
108 # Try to ensure correct ownership and permissions.
109 chown -RL root:wheel /etc/resolv.conf
110 chmod -RL 644 /etc/resolv.conf
119 # Start of active code.
124 # Not called by OpenBSD dhclient(8).
128 # Not called by OpenBSD dhclient(8).
132 # Not called by OpenBSD dhclient(8).
137 # Not called by OpenBSD dhclient(8).
138 # Always succeed. i.e. accept lease.
141 BOUND|RENEW|REBIND|REBOOT)
142 if [ -n "$old_ip_address" ]; then
143 if [ "$old_ip_address" != "$new_ip_address" ]; then
148 if [ "$reason" = BOUND ] ||
149 [ "$reason" = REBOOT ] ||
150 [ -z "$old_ip_address" ] ||
151 [ "$old_ip_address" != "$new_ip_address" ]; then
159 if [ -n "$old_ip_address" ]; then
163 if [ -f /etc/resolv.conf.save ]; then
164 cat /etc/resolv.conf.save > /etc/resolv.conf
171 if [ -n "$new_routers" ]; then
173 if ping -q -c 1 -w 1 "$1"; then
175 if add_new_resolv_conf; then
180 ifconfig $interface inet $new_ip_address delete
181 # XXX Why not a delete_old_address as before all other invocations of