1: #!/bin/sh
2:
3: make_resolv_conf() {
4: if [ x"$new_domain_name_servers" != x ]; then
5: cat /dev/null > /etc/resolv.conf.dhclient
6: if [ x"$new_domain_search" != x ]; then
7: echo search $new_domain_search >> /etc/resolv.conf.dhclient
8: elif [ x"$new_domain_name" != x ]; then
9: # Note that the DHCP 'Domain Name Option' is really just a domain
10: # name, and that this practice of using the domain name option as
11: # a search path is both nonstandard and deprecated.
12: echo search $new_domain_name >> /etc/resolv.conf.dhclient
13: fi
14: for nameserver in $new_domain_name_servers; do
15: echo nameserver $nameserver >>/etc/resolv.conf.dhclient
16: done
17:
18: mv /etc/resolv.conf.dhclient /etc/resolv.conf
19: fi
20: }
21:
22: # Must be used on exit. Invokes the local dhcp client exit hooks, if any.
23: exit_with_hooks() {
24: exit_status=$1
25: if [ -f /etc/dhclient-exit-hooks ]; then
26: . /etc/dhclient-exit-hooks
27: fi
28: # probably should do something with exit status of the local script
29: exit $exit_status
30: }
31:
32: # Invoke the local dhcp client enter hooks, if they exist.
33: if [ -f /etc/dhclient-enter-hooks ]; then
34: exit_status=0
35: . /etc/dhclient-enter-hooks
36: # allow the local script to abort processing of this state
37: # local script must set exit_status variable to nonzero.
38: if [ $exit_status -ne 0 ]; then
39: exit $exit_status
40: fi
41: fi
42:
43: if [ x$new_broadcast_address != x ]; then
44: new_broadcast_arg="broadcast $new_broadcast_address"
45: fi
46: if [ x$old_broadcast_address != x ]; then
47: old_broadcast_arg="broadcast $old_broadcast_address"
48: fi
49: if [ x$new_subnet_mask != x ]; then
50: new_netmask_arg="netmask $new_subnet_mask"
51: fi
52: if [ x$old_subnet_mask != x ]; then
53: old_netmask_arg="netmask $old_subnet_mask"
54: fi
55: if [ x$alias_subnet_mask != x ]; then
56: alias_subnet_arg="netmask $alias_subnet_mask"
57: fi
58: if [ x$new_interface_mtu != x ]; then
59: mtu_arg="mtu $new_interface_mtu"
60: fi
61: if [ x$IF_METRIC != x ]; then
62: metric_arg="metric $IF_METRIC"
63: fi
64:
65: ifconfig=/sbin/ifconfig
66:
67: release=`uname -r`
68: release=`expr $release : '\(.*\)\..*'`
69: relmajor=`echo $release |sed -e 's/^\([^\.]*\)\..*$/\1/'`
70: relminor=`echo $release |sed -e 's/^.*\.\([^\.]*\)$/\1/'`
71:
72: if [ x$reason = xMEDIUM ]; then
73: eval "$ifconfig $interface $medium"
74: $ifconfig $interface
75: sleep 1
76: exit_with_hooks 0
77: fi
78:
79: if [ x$reason = xPREINIT ]; then
80: if [ x$alias_ip_address != x ]; then
81: $ifconfig ${interface}:1 0 down > /dev/null 2>&1
82: route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
83: fi
84: if [ $relmajor -gt 5 ] || ( [ $relmajor -eq 5 ] && [ $relminor -ge 5 ] )
85: then
86: # Turn the interface on
87: $ifconfig $interface plumb
88: $ifconfig $interface up
89: else
90: $ifconfig $interface inet 0.0.0.0 netmask 0.0.0.0 \
91: broadcast 255.255.255.255 up
92: fi
93: exit_with_hooks 0
94: fi
95:
96: if [ x$reason = xARPCHECK ] || [ x$reason = xARPSEND ]; then
97: exit_with_hooks 0;
98: fi
99:
100: if [ x$reason = xBOUND ] || [ x$reason = xRENEW ] || \
101: [ x$reason = xREBIND ] || [ x$reason = xREBOOT ]; then
102: current_hostname=`hostname`
103: if [ x$current_hostname = x ] || \
104: [ x$current_hostname = x$old_host_name ]; then
105: if [ x$current_hostname = x ] || \
106: [ x$new_host_name != x$old_host_name ]; then
107: hostname $new_host_name
108: fi
109: fi
110:
111: if [ x$old_ip_address != x ] && [ x$alias_ip_address != x ] && \
112: [ x$alias_ip_address != x$old_ip_address ]; then
113: $ifconfig ${interface}:1 inet 0 down > /dev/null 2>&1
114: route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
115: fi
116: if [ x$old_ip_address != x ] && [ x$old_ip_address != x$new_ip_address ]; then
117: $ifconfig ${interface} inet 0 down
118: route delete $old_ip_address 127.1 >/dev/null 2>&1
119: for router in $old_routers; do
120: route delete default $router >/dev/null 2>&1
121: done
122: fi
123: if [ x$old_ip_address = x ] || [ x$old_ip_address != x$new_ip_address ] || \
124: [ x$reason = xBOUND ] || [ x$reason = xREBOOT ]; then
125: eval "$ifconfig $interface inet $new_ip_address $new_netmask_arg \
126: $new_broadcast_arg $mtu_arg $metric_arg $medium"
127: route add $new_ip_address 127.1 1 >/dev/null 2>&1
128: for router in $new_routers; do
129: route add default $router 1 >/dev/null 2>&1
130: done
131: else
132: # we haven't changed the address, have we changed other options
133: # that we wish to update?
134: if [ x$new_routers != x ] && [ x$new_routers != x$old_routers ] ; then
135: # if we've changed routers delete the old and add the new.
136: $LOGGER "New Routers: $new_routers"
137: for router in $old_routers; do
138: route delete default $router >/dev/null 2>&1
139: done
140: for router in $new_routers; do
141: route add default $router 1 >/dev/null 2>&1
142: done
143: fi
144: fi
145: if [ x$new_ip_address != x$alias_ip_address ] && [ x$alias_ip_address != x ];
146: then
147: $ifconfig ${interface}:1 inet $alias_ip_address $alias_subnet_arg
148: route add $alias_ip_address 127.0.0.1 1
149: fi
150: make_resolv_conf
151: exit_with_hooks 0
152: fi
153:
154: if [ x$reason = xEXPIRE ] || [ x$reason = xFAIL ] || [ x$reason = xRELEASE ] \
155: || [ x$reason = xSTOP ]; then
156: if [ x$alias_ip_address != x ]; then
157: $ifconfig ${interface}:1 0 down > /dev/null 2>&1
158: route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
159: fi
160: if [ x$old_ip_address != x ]; then
161: $ifconfig $interface inet 0 down
162: route delete $old_ip_address 127.1 >/dev/null 2>&1
163: for router in $old_routers; do
164: route delete default $router >/dev/null 2>&1
165: done
166: fi
167: if [ x$alias_ip_address != x ]; then
168: $ifconfig ${interface}:1 inet $alias_ip_address $alias_subnet_arg
169: route add $alias_ip_address 127.0.0.1 1
170: fi
171: exit_with_hooks 0
172: fi
173:
174: if [ x$reason = xTIMEOUT ]; then
175: if [ x$alias_ip_address != x ]; then
176: $ifconfig ${interface}:1 0 down > /dev/null 2>&1
177: route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
178: fi
179: eval "$ifconfig $interface inet $new_ip_address $new_netmask_arg \
180: $new_broadcast_arg $mtu_arg $metric_arg $medium"
181: sleep 1
182: set $new_routers
183: if ping -s -n -I 1 $1 64 1; then
184: if [ x$new_ip_address != x$alias_ip_address ] && \
185: [ x$alias_ip_address != x ]; then
186: $ifconfig ${interface}:1 inet $alias_ip_address $alias_subnet_arg
187: route add $alias_ip_address 127.0.0.1 1
188: fi
189: route add $new_ip_address 127.1 1 >/dev/null 2>&1
190: for router in $new_routers; do
191: route add default $router 1 >/dev/null 2>&1
192: done
193: make_resolv_conf
194: exit_with_hooks 0
195: fi
196: $ifconfig $interface inet 0 down
197: for router in $old_routers; do
198: route delete default $router >/dev/null 2>&1
199: done
200: exit_with_hooks 1
201: fi
202:
203: exit_with_hooks 0
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