dhclient - Stray '$medium' missed in last commit.
[dragonfly.git] / sbin / dhclient / dhclient-script
CommitLineData
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1#!/bin/sh
2#
057c89ff 3# $OpenBSD: src/sbin/dhclient/dhclient-script,v 1.20 2011/04/04 11:29:51 krw Exp $
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4#
5# Copyright (c) 2003 Kenneth R Westerback <krw@openbsd.org>
6#
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.
10#
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.
18#
19#
20
21#
22# Helper functions that implement common actions.
23#
24
25delete_old_address() {
26 if [ -n "$old_ip_address" ]; then
7cbe3601 27 ifconfig $interface inet $old_ip_address delete
34910103 28 #route delete "$old_ip_address" 127.0.0.1 >/dev/null 2>&1
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29 fi
30}
31
32add_new_address() {
33 ifconfig $interface \
34 inet $new_ip_address \
35 netmask $new_subnet_mask \
7cbe3601 36 broadcast $new_broadcast_address
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37
38 # XXX Original TIMEOUT code did not do this unless $new_routers was set?
34910103 39 #route add $new_ip_address 127.0.0.1 >/dev/null 2>&1
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40}
41
846204b6 42delete_old_routes() {
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43 if [ -n "$old_static_routes" ]; then
44 set $old_static_routes
45 while [ $# -gt 1 ]; do
46 route delete "$1" "$2"
47 shift; shift
48 done
49 fi
50
51 arp -dan
52}
53
54add_new_routes() {
846204b6 55 for router in $new_routers; do
3a961bf3 56 route -q delete default
846204b6 57 if [ "$new_ip_address" = "$router" ]; then
3a961bf3 58 route -q add default -iface $router
846204b6 59 else
3a961bf3 60 route -q add default $router
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61 fi
62 # 2nd and subsequent default routers error out, so explicitly
63 # stop processing the list after the first one.
64 break
65 done
66
67 if [ -n "$new_static_routes" ]; then
68 set $new_static_routes
69 while [ $# -gt 1 ]; do
70 route add $1 $2
71 shift; shift
72 done
73 fi
74}
75
76add_new_resolv_conf() {
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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 $new_domain_name_servers.
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80
81 rm -f /etc/resolv.conf.std
82
83 if [ -n "$new_domain_name" ]; then
84 echo "search $new_domain_name" >>/etc/resolv.conf.std
85 fi
86
87 if [ -n "$new_domain_name_servers" ]; then
88 for nameserver in $new_domain_name_servers; do
89 echo "nameserver $nameserver" >>/etc/resolv.conf.std
90 done
91 fi
92
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
96 fi
97
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.
101
102 if [ -f /etc/resolv.conf ]; then
103 cat /etc/resolv.conf > /etc/resolv.conf.save
104 fi
105 cat /etc/resolv.conf.std > /etc/resolv.conf
106 rm -f /etc/resolv.conf.std
107
108 # Try to ensure correct ownership and permissions.
109 chown -RL root:wheel /etc/resolv.conf
110 chmod -RL 644 /etc/resolv.conf
111
112 return 0
113 fi
114
115 return 1
116}
117
118#
119# Start of active code.
120#
121
122case $reason in
123MEDIUM)
7cbe3601 124 # Not called by OpenBSD dhclient(8).
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125 ;;
126
127PREINIT)
7cbe3601 128 # Not called by OpenBSD dhclient(8).
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129 ;;
130
131ARPSEND)
7cbe3601 132 # Not called by OpenBSD dhclient(8).
601f8f90 133 exit 1
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134 ;;
135
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136ARPCHECK)
137 # Not called by OpenBSD dhclient(8).
138 # Always succeed. i.e. accept lease.
139 ;;
140
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141BOUND|RENEW|REBIND|REBOOT)
142 if [ -n "$old_ip_address" ]; then
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143 if [ "$old_ip_address" != "$new_ip_address" ]; then
144 delete_old_address
145 delete_old_routes
146 fi
147 fi
148 if [ "$reason" = BOUND ] ||
149 [ "$reason" = REBOOT ] ||
150 [ -z "$old_ip_address" ] ||
151 [ "$old_ip_address" != "$new_ip_address" ]; then
152 add_new_address
153 add_new_routes
154 fi
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155 add_new_resolv_conf
156 ;;
157
158EXPIRE|FAIL)
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159 if [ -n "$old_ip_address" ]; then
160 delete_old_address
161 delete_old_routes
162 fi
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163 if [ -f /etc/resolv.conf.save ]; then
164 cat /etc/resolv.conf.save > /etc/resolv.conf
165 fi
166 ;;
167
168TIMEOUT)
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169 add_new_address
170 sleep 1
171 if [ -n "$new_routers" ]; then
172 set "$new_routers"
173 if ping -q -c 1 -w 1 "$1"; then
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174 add_new_routes
175 if add_new_resolv_conf; then
176 exit 0
177 fi
178 fi
179 fi
057c89ff 180 ifconfig $interface inet $new_ip_address delete
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181 # XXX Why not a delete_old_address as before all other invocations of
182 # delete_old_routes?
183 delete_old_routes
184 exit 1
185 ;;
186esac
187
188exit 0