1: #!/bin/sh
2: #
3: # $Id: freebsd,v 1.1.1.1 2012/10/09 09:06:54 misho Exp $
4: #
5: # $FreeBSD$
6:
7: if [ -x /usr/bin/logger ]; then
8: LOGGER="/usr/bin/logger -s -p user.notice -t dhclient"
9: else
10: LOGGER=echo
11: fi
12:
13: make_resolv_conf() {
14: if [ x"$new_domain_name_servers" != x ]; then
15: ( cat /dev/null > /etc/resolv.conf.dhclient )
16: exit_status=$?
17: if [ $exit_status -ne 0 ]; then
18: $LOGGER "Unable to create /etc/resolv.conf.dhclient: Error $exit_status"
19: else
20: if [ "x$new_domain_search" != x ]; then
21: ( echo search $new_domain_search >> /etc/resolv.conf.dhclient )
22: exit_status=$?
23: elif [ "x$new_domain_name" != x ]; then
24: # Note that the DHCP 'Domain Name Option' is really just a domain
25: # name, and that this practice of using the domain name option as
26: # a search path is both nonstandard and deprecated.
27: ( echo search $new_domain_name >> /etc/resolv.conf.dhclient )
28: exit_status=$?
29: fi
30: for nameserver in $new_domain_name_servers; do
31: if [ $exit_status -ne 0 ]; then
32: break
33: fi
34: ( echo nameserver $nameserver >>/etc/resolv.conf.dhclient )
35: exit_status=$?
36: done
37:
38: # If there were no errors, attempt to mv the new file into place.
39: if [ $exit_status -eq 0 ]; then
40: ( mv /etc/resolv.conf.dhclient /etc/resolv.conf )
41: exit_status=$?
42: fi
43:
44: if [ $exit_status -ne 0 ]; then
45: $LOGGER "Error while writing new /etc/resolv.conf."
46: fi
47: fi
48: elif [ "x${new_dhcp6_name_servers}" != x ] ; then
49: ( cat /dev/null > /etc/resolv.conf.dhclient6 )
50: exit_status=$?
51: if [ $exit_status -ne 0 ] ; then
52: $LOGGER "Unable to create /etc/resolv.conf.dhclient6: Error $exit_status"
53: else
54: if [ "x${new_dhcp6_domain_search}" != x ] ; then
55: ( echo search ${new_dhcp6_domain_search} >> /etc/resolv.conf.dhclient6 )
56: exit_status=$?
57: fi
58: for nameserver in ${new_dhcp6_name_servers} ; do
59: if [ $exit_status -ne 0 ] ; then
60: break
61: fi
62: # If the nameserver has a link-local address
63: # add a <zone_id> (interface name) to it.
64: case $nameserver in
65: fe80:*) zone_id="%$interface";;
66: FE80:*) zone_id="%$interface";;
67: *) zone_id='';;
68: esac
69: ( echo nameserver ${nameserver}$zone_id >> /etc/resolv.conf.dhclient6 )
70: exit_status=$?
71: done
72:
73: if [ $exit_status -eq 0 ] ; then
74: ( mv /etc/resolv.conf.dhclient6 /etc/resolv.conf )
75: exit_status=$?
76: fi
77:
78: if [ $exit_status -ne 0 ] ; then
79: $LOGGER "Error while writing new /etc/resolv.conf."
80: fi
81: fi
82: fi
83: }
84:
85: # Must be used on exit. Invokes the local dhcp client exit hooks, if any.
86: exit_with_hooks() {
87: exit_status=$1
88: if [ -f /etc/dhclient-exit-hooks ]; then
89: . /etc/dhclient-exit-hooks
90: fi
91: # probably should do something with exit status of the local script
92: exit $exit_status
93: }
94:
95: # Invoke the local dhcp client enter hooks, if they exist.
96: if [ -f /etc/dhclient-enter-hooks ]; then
97: exit_status=0
98: . /etc/dhclient-enter-hooks
99: # allow the local script to abort processing of this state
100: # local script must set exit_status variable to nonzero.
101: if [ $exit_status -ne 0 ]; then
102: exit $exit_status
103: fi
104: fi
105:
106: if [ x$new_network_number != x ]; then
107: $LOGGER New Network Number: $new_network_number
108: fi
109:
110: if [ x$new_broadcast_address != x ]; then
111: $LOGGER New Broadcast Address: $new_broadcast_address
112: new_broadcast_arg="broadcast $new_broadcast_address"
113: fi
114: if [ x$old_broadcast_address != x ]; then
115: old_broadcast_arg="broadcast $old_broadcast_address"
116: fi
117: if [ x$new_subnet_mask != x ]; then
118: new_netmask_arg="netmask $new_subnet_mask"
119: fi
120: if [ x$old_subnet_mask != x ]; then
121: old_netmask_arg="netmask $old_subnet_mask"
122: fi
123: if [ x$alias_subnet_mask != x ]; then
124: alias_subnet_arg="netmask $alias_subnet_mask"
125: fi
126: if [ x$new_interface_mtu != x ]; then
127: mtu_arg="mtu $new_interface_mtu"
128: fi
129: if [ x$IF_METRIC != x ]; then
130: metric_arg="metric $IF_METRIC"
131: fi
132:
133: if [ x$reason = xMEDIUM ]; then
134: eval "ifconfig $interface $medium"
135: eval "ifconfig $interface inet -alias 0.0.0.0 $medium" >/dev/null 2>&1
136: sleep 1
137: exit_with_hooks 0
138: fi
139:
140: ###
141: ### DHCPv4 Handlers
142: ###
143:
144: if [ x$reason = xPREINIT ]; then
145: if [ x$alias_ip_address != x ]; then
146: ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
147: route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
148: fi
149: ifconfig $interface inet 0.0.0.0 netmask 0.0.0.0 \
150: broadcast 255.255.255.255 up
151: exit_with_hooks 0
152: fi
153:
154: if [ x$reason = xARPCHECK ] || [ x$reason = xARPSEND ]; then
155: exit_with_hooks 0;
156: fi
157:
158: if [ x$reason = xBOUND ] || [ x$reason = xRENEW ] || \
159: [ x$reason = xREBIND ] || [ x$reason = xREBOOT ]; then
160: current_hostname=`/bin/hostname`
161: if [ x$current_hostname = x ] || \
162: [ x$current_hostname = x$old_host_name ]; then
163: if [ x$current_hostname = x ] || \
164: [ x$new_host_name != x$old_host_name ]; then
165: $LOGGER "New Hostname: $new_host_name"
166: hostname $new_host_name
167: fi
168: fi
169: if [ x$old_ip_address != x ] && [ x$alias_ip_address != x ] && \
170: [ x$alias_ip_address != x$old_ip_address ]; then
171: ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
172: route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
173: fi
174: if [ x$old_ip_address != x ] && [ x$old_ip_address != x$new_ip_address ]
175: then
176: eval "ifconfig $interface inet -alias $old_ip_address $medium"
177: route delete $old_ip_address 127.1 >/dev/null 2>&1
178: for router in $old_routers; do
179: route delete default $router >/dev/null 2>&1
180: done
181: if [ -n "$old_static_routes" ]; then
182: set -- $old_static_routes
183: while [ $# -gt 1 ]; do
184: route delete $1 $2
185: shift; shift
186: done
187: fi
188: arp -n -a | sed -n -e 's/^.*(\(.*\)) at .*$/arp -d \1/p' |sh
189: fi
190: if [ x$old_ip_address = x ] || [ x$old_ip_address != x$new_ip_address ] || \
191: [ x$reason = xBOUND ] || [ x$reason = xREBOOT ]; then
192: eval "ifconfig $interface inet $new_ip_address $new_netmask_arg \
193: $new_broadcast_arg $mtu_arg $metric_arg $medium"
194: $LOGGER "New IP Address ($interface): $new_ip_address"
195: $LOGGER "New Subnet Mask ($interface): $new_subnet_mask"
196: $LOGGER "New Broadcast Address ($interface): $new_broadcast_address"
197: if [ -n "$new_routers" ]; then
198: $LOGGER "New Routers: $new_routers"
199: fi
200: route add $new_ip_address 127.1 >/dev/null 2>&1
201: for router in $new_routers; do
202: # If the subnet is captive, eg the netmask is /32 but the default
203: # gateway is (obviously) outside of this, then we need to produce a
204: # host route to reach the gateway.
205: if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
206: route add -host $router -interface $interface
207: fi
208: route add default $router >/dev/null 2>&1
209: done
210: if [ -n "$new_static_routes" ]; then
211: $LOGGER "New Static Routes: $new_static_routes"
212: set -- $new_static_routes
213: while [ $# -gt 1 ]; do
214: route add $1 $2
215: shift; shift
216: done
217: fi
218: else
219: # we haven't changed the address, have we changed other options
220: # that we wish to update?
221: if [ x$new_routers != x ] && [ x$new_routers != x$old_routers ] ; then
222: # if we've changed routers delete the old and add the new.
223: $LOGGER "New Routers: $new_routers"
224: for router in $old_routers; do
225: route delete default $router >/dev/null 2>&1
226: done
227: for router in $new_routers; do
228: # If the subnet is captive, eg the netmask is /32 but the default
229: # gateway is (obviously) outside of this, then we need to produce a
230: # host route to reach the gateway.
231: if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
232: route add -host $router -interface $interface
233: fi
234: route add default $router >/dev/null 2>&1
235: done
236: fi
237: fi
238: if [ x$new_ip_address != x$alias_ip_address ] && [ x$alias_ip_address != x ];
239: then
240: ifconfig $interface inet alias $alias_ip_address $alias_subnet_arg
241: route add $alias_ip_address 127.0.0.1
242: fi
243: make_resolv_conf
244: exit_with_hooks 0
245: fi
246:
247: if [ x$reason = xEXPIRE ] || [ x$reason = xFAIL ] || [ x$reason = xRELEASE ] \
248: || [ x$reason = xSTOP ]; then
249: if [ x$alias_ip_address != x ]; then
250: ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
251: route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
252: fi
253: if [ x$old_ip_address != x ]; then
254: eval "ifconfig $interface inet -alias $old_ip_address $medium"
255: route delete $old_ip_address 127.1 >/dev/null 2>&1
256: for router in $old_routers; do
257: route delete default $router >/dev/null 2>&1
258: done
259: if [ -n "$old_static_routes" ]; then
260: set -- $old_static_routes
261: while [ $# -gt 1 ]; do
262: route delete $1 $2
263: shift; shift
264: done
265: fi
266: arp -n -a | sed -n -e 's/^.*(\(.*\)) at .*$/arp -d \1/p' \
267: |sh >/dev/null 2>&1
268: fi
269: if [ x$alias_ip_address != x ]; then
270: ifconfig $interface inet alias $alias_ip_address $alias_subnet_arg
271: route add $alias_ip_address 127.0.0.1
272: fi
273: exit_with_hooks 0
274: fi
275:
276: if [ x$reason = xTIMEOUT ]; then
277: if [ x$alias_ip_address != x ]; then
278: ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
279: route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
280: fi
281: eval "ifconfig $interface inet $new_ip_address $new_netmask_arg \
282: $new_broadcast_arg $mtu_arg $metric_arg $medium"
283: $LOGGER "New IP Address ($interface): $new_ip_address"
284: $LOGGER "New Subnet Mask ($interface): $new_subnet_mask"
285: $LOGGER "New Broadcast Address ($interface): $new_broadcast_address"
286: sleep 1
287: if [ -n "$new_routers" ]; then
288: $LOGGER "New Routers: $new_routers"
289: set -- $new_routers
290: if ping -q -c 1 $1; then
291: if [ x$new_ip_address != x$alias_ip_address ] && \
292: [ x$alias_ip_address != x ]; then
293: ifconfig $interface inet alias $alias_ip_address $alias_subnet_arg
294: route add $alias_ip_address 127.0.0.1
295: fi
296: route add $new_ip_address 127.1 >/dev/null 2>&1
297: for router in $new_routers; do
298: if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
299: route add -host $router -interface $interface
300: fi
301: route add default $router >/dev/null 2>&1
302: done
303: set -- $new_static_routes
304: while [ $# -gt 1 ]; do
305: route add $1 $2
306: shift; shift
307: done
308: make_resolv_conf
309: exit_with_hooks 0
310: fi
311: fi
312: eval "ifconfig $interface inet -alias $new_ip_address $medium"
313: for router in $old_routers; do
314: route delete default $router >/dev/null 2>&1
315: done
316: if [ -n "$old_static_routes" ]; then
317: set -- $old_static_routes
318: while [ $# -gt 1 ]; do
319: route delete $1 $2
320: shift; shift
321: done
322: fi
323: arp -n -a | sed -n -e 's/^.*(\(.*\)) at .*$/arp -d \1/p' \
324: |sh >/dev/null 2>&1
325: exit_with_hooks 1
326: fi
327:
328: ###
329: ### DHCPv6 Handlers
330: ###
331:
332: if [ ${reason} = PREINIT6 ] ; then
333: # Ensure interface is up.
334: ifconfig ${interface} up
335:
336: # XXX: Remove any stale addresses from aborted clients.
337:
338: exit_with_hooks 0
339: fi
340:
341: if [ x${old_ip6_prefix} != x ] || [ x${new_ip6_prefix} != x ] ; then
342: echo Prefix ${reason} old=${old_ip6_prefix} new=${new_ip6_prefix}
343:
344: exit_with_hooks 0
345: fi
346:
347: if [ ${reason} = BOUND6 ] ; then
348: if [ x${new_ip6_address} = x ] || [ x${new_ip6_prefixlen} = x ] ; then
349: exit_with_hooks 2;
350: fi
351:
352: ifconfig ${interface} inet6 ${new_ip6_address}/${new_ip6_prefixlen} alias
353:
354: # Check for nameserver options.
355: make_resolv_conf
356:
357: exit_with_hooks 0
358: fi
359:
360: if [ ${reason} = RENEW6 ] || [ ${reason} = REBIND6 ] ; then
361: # Make sure nothing has moved around on us.
362:
363: # Nameservers/domains/etc.
364: if [ "x${new_dhcp6_name_servers}" != "x${old_dhcp6_name_servers}" ] ||
365: [ "x${new_dhcp6_domain_search}" != "x${old_dhcp6_domain_search}" ] ; then
366: make_resolv_conf
367: fi
368:
369: exit_with_hooks 0
370: fi
371:
372: if [ ${reason} = DEPREF6 ] ; then
373: if [ x${new_ip6_address} = x ] ; then
374: exit_with_hooks 2;
375: fi
376:
377: ifconfig ${interface} inet6 ${new_ip6_address} deprecated
378:
379: exit_with_hooks 0
380: fi
381:
382: if [ ${reason} = EXPIRE6 -o ${reason} = RELEASE6 -o ${reason} = STOP6 ] ; then
383: if [ x${old_ip6_address} = x ] || [ x${old_ip6_prefixlen} = x ] ; then
384: exit_with_hooks 2;
385: fi
386:
387: ifconfig ${interface} inet6 ${old_ip6_address}/${old_ip6_prefixlen} -alias
388:
389: exit_with_hooks 0
390: fi
391:
392: exit_with_hooks 0
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