1: #!/bin/sh
2:
3: make_resolv_conf() {
4: if [ x"$new_domain_name_servers" != x ]; then
5: cat /dev/null > /etc/resolv.conf.dhclient
6: chmod 644 /etc/resolv.conf.dhclient
7: if [ x"$new_domain_search" != x ]; then
8: echo search $new_domain_search >> /etc/resolv.conf.dhclient
9: elif [ x"$new_domain_name" != x ]; then
10: # Note that the DHCP 'Domain Name Option' is really just a domain
11: # name, and that this practice of using the domain name option as
12: # a search path is both nonstandard and deprecated.
13: echo search $new_domain_name >> /etc/resolv.conf.dhclient
14: fi
15: for nameserver in $new_domain_name_servers; do
16: echo nameserver $nameserver >>/etc/resolv.conf.dhclient
17: done
18:
19: mv /etc/resolv.conf.dhclient /etc/resolv.conf
20: elif [ "x${new_dhcp6_name_servers}" != x ] ; then
21: cat /dev/null > /etc/resolv.conf.dhclient6
22: chmod 644 /etc/resolv.conf.dhclient6
23:
24: if [ "x${new_dhcp6_domain_search}" != x ] ; then
25: echo search ${new_dhcp6_domain_search} >> /etc/resolv.conf.dhclient6
26: fi
27: for nameserver in ${new_dhcp6_name_servers} ; do
28: # If the nameserver has a link-local address
29: # add a <zone_id> (interface name) to it.
30: case $nameserver in
31: fe80:*) zone_id="%$interface";;
32: FE80:*) zone_id="%$interface";;
33: *) zone_id='';;
34: esac
35: echo nameserver ${nameserver}$zone_id >> /etc/resolv.conf.dhclient6
36: done
37:
38: mv /etc/resolv.conf.dhclient6 /etc/resolv.conf
39: fi
40: }
41:
42: # Must be used on exit. Invokes the local dhcp client exit hooks, if any.
43: exit_with_hooks() {
44: exit_status=$1
45: if [ -f /etc/dhclient-exit-hooks ]; then
46: . /etc/dhclient-exit-hooks
47: fi
48: # probably should do something with exit status of the local script
49: exit $exit_status
50: }
51:
52: # Invoke the local dhcp client enter hooks, if they exist.
53: if [ -f /etc/dhclient-enter-hooks ]; then
54: exit_status=0
55: . /etc/dhclient-enter-hooks
56: # allow the local script to abort processing of this state
57: # local script must set exit_status variable to nonzero.
58: if [ $exit_status -ne 0 ]; then
59: exit $exit_status
60: fi
61: fi
62:
63: ###
64: ### DHCPv4 Handlers
65: ###
66:
67: if [ x$new_broadcast_address != x ]; then
68: new_broadcast_arg="broadcast $new_broadcast_address"
69: fi
70: if [ x$new_subnet_mask != x ]; then
71: new_subnet_arg="netmask $new_subnet_mask"
72: fi
73: if [ x$alias_subnet_mask != x ]; then
74: alias_subnet_arg="netmask $alias_subnet_mask"
75: fi
76: if [ x$new_interface_mtu != x ]; then
77: mtu_arg="mtu $new_interface_mtu"
78: fi
79: if [ x$IF_METRIC != x ]; then
80: metric_arg="metric $IF_METRIC"
81: fi
82:
83: if [ x$reason = xMEDIUM ]; then
84: # Linux doesn't do mediums (ok, ok, media).
85: exit_with_hooks 0
86: fi
87:
88: if [ x$reason = xPREINIT ]; then
89: if [ x$alias_ip_address != x ]; then
90: # Bring down alias interface. Its routes will disappear too.
91: ifconfig $interface:0- 0.0.0.0
92: fi
93: ifconfig $interface 0.0.0.0 up
94:
95: # We need to give the kernel some time to get the interface up.
96: sleep 1
97:
98: exit_with_hooks 0
99: fi
100:
101: if [ x$reason = xARPCHECK ] || [ x$reason = xARPSEND ]; then
102: exit_with_hooks 0
103: fi
104:
105: if [ x$reason = xBOUND ] || [ x$reason = xRENEW ] || \
106: [ x$reason = xREBIND ] || [ x$reason = xREBOOT ]; then
107: current_hostname=`hostname`
108: if [ x$current_hostname = x ] || \
109: [ x$current_hostname = x$old_host_name ]; then
110: if [ x$current_hostname = x ] || \
111: [ x$new_host_name != x$old_host_name ]; then
112: hostname $new_host_name
113: fi
114: fi
115:
116: if [ x$old_ip_address != x ] && [ x$alias_ip_address != x ] && \
117: [ x$alias_ip_address != x$old_ip_address ]; then
118: # Possible new alias. Remove old alias.
119: ifconfig $interface:0- 0.0.0.0
120: fi
121: if [ x$old_ip_address != x ] && [ x$old_ip_address != x$new_ip_address ]; then
122: # IP address changed. Bringing down the interface will delete all routes,
123: # and clear the ARP cache.
124: ifconfig $interface 0.0.0.0 down
125:
126: fi
127: if [ x$old_ip_address = x ] || [ x$old_ip_address != x$new_ip_address ] || \
128: [ x$reason = xBOUND ] || [ x$reason = xREBOOT ]; then
129:
130: ifconfig $interface $new_ip_address $new_subnet_arg \
131: $new_broadcast_arg $mtu_arg $metric_arg
132: for router in $new_routers; do
133: if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
134: route add -host $router dev $interface
135: fi
136: route add default gw $router
137: done
138: else
139: # we haven't changed the address, have we changed other options
140: # that we wish to update?
141: if [ x$new_routers != x ] && [ x$new_routers != x$old_routers ] ; then
142: # if we've changed routers delete the old and add the new.
143: $LOGGER "New Routers: $new_routers"
144: for router in $old_routers; do
145: route delete default $router
146: done
147: for router in $new_routers; do
148: if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
149: route add -host $router dev $interface
150: fi
151: route add default gw $router
152: done
153: fi
154: fi
155: if [ x$new_ip_address != x$alias_ip_address ] && [ x$alias_ip_address != x ];
156: then
157: ifconfig $interface:0- 0.0.0.0
158: ifconfig $interface:0 $alias_ip_address $alias_subnet_arg
159: route add -host $alias_ip_address $interface:0
160: fi
161: make_resolv_conf
162: exit_with_hooks 0
163: fi
164:
165: if [ x$reason = xEXPIRE ] || [ x$reason = xFAIL ] || [ x$reason = xRELEASE ] \
166: || [ x$reason = xSTOP ]; then
167: if [ x$alias_ip_address != x ]; then
168: # Turn off alias interface.
169: ifconfig $interface:0- 0.0.0.0
170: fi
171: if [ x$old_ip_address != x ]; then
172: # Shut down interface, which will delete routes and clear arp cache.
173: ifconfig $interface 0.0.0.0 down
174: fi
175: if [ x$alias_ip_address != x ]; then
176: ifconfig $interface:0 $alias_ip_address $alias_subnet_arg
177: route add -host $alias_ip_address $interface:0
178: fi
179: exit_with_hooks 0
180: fi
181:
182: if [ x$reason = xTIMEOUT ]; then
183: if [ x$alias_ip_address != x ]; then
184: ifconfig $interface:0- 0.0.0.0
185: fi
186: ifconfig $interface $new_ip_address $new_subnet_arg \
187: $new_broadcast_arg $mtu_arg $metric_arg
188: set $new_routers
189: if ping -q -c 1 $1; then
190: if [ x$new_ip_address != x$alias_ip_address ] && \
191: [ x$alias_ip_address != x ]; then
192: ifconfig $interface:0 $alias_ip_address $alias_subnet_arg
193: route add -host $alias_ip_address dev $interface:0
194: fi
195: for router in $new_routers; do
196: if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
197: route add -host $router dev $interface
198: fi
199: route add default gw $router
200: done
201: make_resolv_conf
202: exit_with_hooks 0
203: fi
204: ifconfig $interface 0.0.0.0 down
205: exit_with_hooks 1
206: fi
207:
208: ###
209: ### DHCPv6 Handlers
210: ###
211:
212: if [ x$reason = xPREINIT6 ]; then
213: # Ensure interface is up.
214: ifconfig ${interface} up
215:
216: # Remove any stale addresses from aborted clients.
217: ip -f inet6 addr flush dev ${interface} scope global
218:
219: exit_with_hooks 0
220: fi
221:
222: if [ x${old_ip6_prefix} != x ] || [ x${new_ip6_prefix} != x ] ; then
223: echo Prefix ${reason} old=${old_ip6_prefix} new=${new_ip6_prefix}
224:
225: exit_with_hooks 0
226: fi
227:
228: if [ x$reason = xBOUND6 ]; then
229: if [ x${new_ip6_address} = x ] || [ x${new_ip6_prefixlen} = x ] ; then
230: exit_with_hooks 2;
231: fi
232:
233: ifconfig ${interface} inet6 ${new_ip6_address}/${new_ip6_prefixlen} alias
234:
235: # Check for nameserver options.
236: make_resolv_conf
237:
238: exit_with_hooks 0
239: fi
240:
241: if [ x$reason = xRENEW6 ] || [ x$reason = xREBIND6 ]; then
242: if [ x${new_ip6_address} = x ] || [ x${new_ip6_prefixlen} = x ] ; then
243: exit_with_hooks 2;
244: fi
245:
246: ifconfig ${interface} inet6 ${new_ip6_address}/${new_ip6_prefixlen} alias
247:
248: # Make sure nothing has moved around on us.
249:
250: # Nameservers/domains/etc.
251: if [ "x${new_dhcp6_name_servers}" != "x${old_dhcp6_name_servers}" ] ||
252: [ "x${new_dhcp6_domain_search}" != "x${old_dhcp6_domain_search}" ] ; then
253: make_resolv_conf
254: fi
255:
256: exit_with_hooks 0
257: fi
258:
259: if [ x$reason = xDEPREF6 ]; then
260: if [ x${new_ip6_address} = x ] ; then
261: exit_with_hooks 2;
262: fi
263:
264: ifconfig ${interface} inet6 ${new_ip6_address} deprecated
265:
266: exit_with_hooks 0
267: fi
268:
269: if [ x$reason = xEXPIRE6 -o x$reason = xRELEASE6 -o x$reason = xSTOP6 ]; then
270: if [ x${old_ip6_address} = x ] || [ x${old_ip6_prefixlen} = x ] ; then
271: exit_with_hooks 2;
272: fi
273:
274: ifconfig ${interface} inet6 ${old_ip6_address}/${old_ip6_prefixlen} -alias
275:
276: exit_with_hooks 0
277: fi
278:
279: exit_with_hooks 0
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