summaryrefslogtreecommitdiffstats
path: root/etc/rc.network6
blob: 7d35cdcc859a6a96333bcf57f33b769fc6cb32b3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
#! /bin/sh
#
# Copyright (c) 2000  The KAME Project
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
#

# Note that almost all of the user-configurable behavior is not in this
# file, but rather in /etc/defaults/rc.conf.  Please check that file
# first before contemplating any changes here.  If you do need to change
# this file for some reason, we would like to know about it.

hexdigit () {
	if [ $1 -lt 10 ]; then
		echo $1
	else
		case $1 in
		10)	echo a ;;
		11)	echo b ;;
		12)	echo c ;;
		13)	echo d ;;
		14)	echo e ;;
		15)	echo f ;;
		esac
	fi
}

hexprint () {
	val=$1
	str=''

	dig=`hexdigit $((${val} & 15))`
	str=${dig}${str}
	val=$((${val} >> 4))
	while [ ${val} -gt 0 ]; do
		dig=`hexdigit $((${val} & 15))`
		str=${dig}${str}
		val=$((${val} >> 4))
	done

	echo ${str}
}

# IPv6 startup

network6_pass1() {
	echo -n 'Doing IPv6 network setup:'

	# Initialize IP filtering using ip6fw
	#
	if /sbin/ip6fw -q flush > /dev/null 2>&1; then
		ipv6_firewall_in_kernel=1
	else
		ipv6_firewall_in_kernel=0
	fi

	case ${ipv6_firewall_enable} in
	[Yy][Ee][Ss])
		if [ "${ipv6_firewall_in_kernel}" -eq 0 ] && kldload ip6fw; then
			ipv6_firewall_in_kernel=1
			echo "Kernel IPv6 firewall module loaded."
		elif [ "${ipv6_firewall_in_kernel}" -eq 0 ]; then
			echo "Warning: IPv6 firewall kernel module failed to load."
		fi
		;;
	esac

	# Load the filters if required
	#
	case ${ipv6_firewall_in_kernel} in
	1)
		if [ -z "${ipv6_firewall_script}" ]; then
			ipv6_firewall_script=/etc/rc.firewall6
		fi

		case ${ipv6_firewall_enable} in
		[Yy][Ee][Ss])
			if [ -r "${ipv6_firewall_script}" ]; then
				. "${ipv6_firewall_script}"
				echo -n 'IPv6 Firewall rules loaded.'
			elif [ "`ip6fw l 65535`" = "65535 deny ipv6 from any to any" ]; then
				echo -n "Warning: kernel has IPv6 firewall functionality, "
				echo "but IPv6 firewall rules are not enabled."
				echo "		 All ipv6 services are disabled."
			fi

			case ${ipv6_firewall_logging} in
			[Yy][Ee][Ss] | '')
				echo 'IPv6 Firewall logging=YES'
				sysctl net.inet6.ip6.fw.verbose=1 >/dev/null
				;;
			*)
				;;
			esac

			;;
		esac
		;;
	esac

	case ${ipv6_network_interfaces} in
	[Aa][Uu][Tt][Oo])
		#
		# list of interfaces, and prefix for interfaces
		#
		ipv6_network_interfaces="`ifconfig -l`"
		;;
	esac

	# just to make sure
	ifconfig lo0 up

	# disallow "internal" addresses to appear on the wire
	route add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject
	route add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject

	case ${ipv6_gateway_enable} in
	[Yy][Ee][Ss])
		# act as a router
		sysctl net.inet6.ip6.forwarding=1
		sysctl net.inet6.ip6.accept_rtadv=0

		# wait for DAD
		for i in $ipv6_network_interfaces; do
			ifconfig $i up
		done
		sleep `sysctl -n net.inet6.ip6.dad_count`
		sleep 1
		;;
	*)
		# act as endhost - start with manual configuration
		sysctl net.inet6.ip6.forwarding=0
		sysctl net.inet6.ip6.accept_rtadv=0
		;;
	esac

	# setting up interfaces
	network6_interface_setup $ipv6_network_interfaces

	# wait for DAD's completion (for global addrs)
	sleep `sysctl -n net.inet6.ip6.dad_count`
	sleep 1

	case ${ipv6_gateway_enable} in
	[Yy][Ee][Ss])
		# Filter out interfaces on which IPv6 addr init failed.
		ipv6_working_interfaces=""
		for i in ${ipv6_network_interfaces}; do
			laddr=`network6_getladdr $i exclude_tentative`
			case ${laddr} in
			'')
				;;
			*)
				ipv6_working_interfaces="$i \
					${ipv6_working_interfaces}"
				;;
			esac
		done
		ipv6_network_interfaces=${ipv6_working_interfaces}
		;;
	esac

	# 6to4 setup
	network6_stf_setup

	# install the "default interface" to kernel, which will be used
	# as the default route when there's no router.
	network6_default_interface_setup

	# setup static routes
	network6_static_routes_setup

	# setup faith
	network6_faith_setup

	case ${ipv6_gateway_enable} in
	[Yy][Ee][Ss])
		# ipv6_router
		case ${ipv6_router_enable} in
		[Yy][Ee][Ss])
			if [ -x ${ipv6_router} ]; then
				echo -n " ${ipv6_router}"
				${ipv6_router} ${ipv6_router_flags}
			fi
			;;
		esac

		# rtadvd
		# This should enabled with a great care.
		# You may want to fine-tune /etc/rtadvd.conf.
		#
		# And if you wish your rtadvd to receive and process
		# router renumbering messages, specify your Router Renumbering
		# security policy by -R option.
		#
		# See `man 3 ipsec_set_policy` for IPsec policy specification
		# details.
		# (CAUTION: This enables your routers prefix renumbering
		# from another machine, so if you enable this, do it with
		# enough care.)
		#
		case ${rtadvd_enable} in
		[Yy][Ee][Ss])
			# default
			case ${rtadvd_interfaces} in
			'')
				for i in ${ipv6_network_interfaces}; do
					case $i in
					lo0|gif[0-9]*|stf[0-9]*|faith[0-9]*|lp[0-9]*|sl[0-9]*|tun[0-9]*)
						continue
						;;
					*)
						rtadvd_interfaces="${rtadvd_interfaces} ${i}"
						;;
					esac
				done
				;;
			esac
			rtadvd ${rtadvd_interfaces}
			#
			# Enable Router Renumbering, unicast case
			# (use correct src/dst addr)
			# rtadvd -R "in ipsec ah/transport/fec0:0:0:1::1-fec0:0:0:10::1/require" \
			#	${ipv6_network_interfaces}
			# Enable Router Renumbering, multicast case
			# (use correct src addr)
			# rtadvd -R "in ipsec ah/transport/ff05::2-fec0:0:0:10::1/require" \
			#	${ipv6_network_interfaces}
			;;
		esac

		# mroute6d
		case ${mroute6d_enable} in
		[Yy][Ee][Ss])
			if [ -x ${mroute6d_program} ]; then
				echo -n " ${mroute6d_program}"
				${mroute6d_program} ${mroute6d_flags}
			fi
			;;
		esac
		;;
	esac

	case ${ipv6_ipv4mapping} in
	[Yy][Ee][Ss])
		echo -n ' IPv4 mapped IPv6 address support=YES'
		sysctl net.inet6.ip6.v6only=0 >/dev/null
		;;
	'' | *)
		echo -n ' IPv4 mapped IPv6 address support=NO'
		sysctl net.inet6.ip6.v6only=1 >/dev/null
		;;
	esac

	echo '.'

	# Let future generations know we made it.
	#
	network6_pass1_done=YES
}

network6_interface_setup() {
	interfaces=$*
	rtsol_interfaces=''
	case ${ipv6_gateway_enable} in
	[Yy][Ee][Ss])
		rtsol_available=no
		;;
	*)
		rtsol_available=yes
		;;
	esac
	for i in $interfaces; do
		rtsol_interface=yes
		eval prefix=\$ipv6_prefix_$i
		if [ -n "${prefix}" ]; then
			rtsol_available=no
			rtsol_interface=no
			laddr=`network6_getladdr $i`
			hostid=`expr "${laddr}" : 'fe80::\(.*\)%\(.*\)'`
			for j in ${prefix}; do
				address=$j\:${hostid}
				ifconfig $i inet6 ${address} prefixlen 64 alias

				case ${ipv6_gateway_enable} in
				[Yy][Ee][Ss])
					# subnet-router anycast address
					# (rfc2373)
					ifconfig $i inet6 $j:: prefixlen 64 \
						alias anycast
					;;
				esac
			done
		fi
		eval ipv6_ifconfig=\$ipv6_ifconfig_$i
		if [ -n "${ipv6_ifconfig}" ]; then
			rtsol_available=no
			rtsol_interface=no
			ifconfig $i inet6 ${ipv6_ifconfig} alias
		fi

		if [ ${rtsol_available} = yes -a ${rtsol_interface} = yes ]
		then
			case ${i} in
			lo0|gif[0-9]*|stf[0-9]*|faith[0-9]*|lp[0-9]*|sl[0-9]*|tun[0-9]*)
				;;
			*)
				rtsol_interfaces="${rtsol_interfaces} ${i}"
				;;
			esac
		else
			ifconfig $i inet6
		fi
	done

	if [ ${rtsol_available} = yes -a -n "${rtsol_interfaces}" ]; then
		# Act as endhost - automatically configured.
		# You can configure only single interface, as
		# specification assumes that autoconfigured host has
		# single interface only.
		sysctl net.inet6.ip6.accept_rtadv=1
		set ${rtsol_interfaces}
		ifconfig $1 up
		rtsol $1
	fi

	for i in $interfaces; do
		alias=0
		while : ; do
			eval ipv6_ifconfig=\$ipv6_ifconfig_${i}_alias${alias}
			if [ -z "${ipv6_ifconfig}" ]; then
				break;
			fi
			ifconfig $i inet6 ${ipv6_ifconfig} alias
			alias=$((${alias} + 1))
		done
	done
}

network6_stf_setup() {
	case ${stf_interface_ipv4addr} in
	[Nn][Oo] | '')
		;;
	*)
		# assign IPv6 addr and interface route for 6to4 interface
		stf_prefixlen=$((16+${stf_interface_ipv4plen:-0}))
		OIFS="$IFS"
		IFS=".$IFS"
		set ${stf_interface_ipv4addr}
		IFS="$OIFS"
		hexfrag1=`hexprint $(($1*256 + $2))`
		hexfrag2=`hexprint $(($3*256 + $4))`
		ipv4_in_hexformat="${hexfrag1}:${hexfrag2}"
		case ${stf_interface_ipv6_ifid} in
		[Aa][Uu][Tt][Oo] | '')
			for i in ${ipv6_network_interfaces}; do
				laddr=`network6_getladdr ${i}`
				case ${laddr} in
				'')
					;;
				*)
					break
					;;
				esac
			done
			stf_interface_ipv6_ifid=`expr "${laddr}" : \
						      'fe80::\(.*\)%\(.*\)'`
			case ${stf_interface_ipv6_ifid} in
			'')
				stf_interface_ipv6_ifid=0:0:0:1
				;;
			esac
			;;
		esac
		ifconfig stf0 create >/dev/null 2>&1
		ifconfig stf0 inet6 2002:${ipv4_in_hexformat}:${stf_interface_ipv6_slaid:-0}:${stf_interface_ipv6_ifid} \
			prefixlen ${stf_prefixlen}
		# disallow packets to malicious 6to4 prefix
		route add -inet6 2002:e000:: -prefixlen 20 ::1 -reject
		route add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject
		route add -inet6 2002:0000:: -prefixlen 24 ::1 -reject
		route add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject
		;;
	esac
}

network6_static_routes_setup() {
	# Set up any static routes.
        case ${ipv6_defaultrouter} in
        [Nn][Oo] | '')
                ;;
        *)
                ipv6_static_routes="default ${ipv6_static_routes}"
                ipv6_route_default="default ${ipv6_defaultrouter}"
                ;;
        esac
	case ${ipv6_static_routes} in
	[Nn][Oo] | '')
		;;
	*)
		for i in ${ipv6_static_routes}; do
			eval ipv6_route_args=\$ipv6_route_${i}
			route add -inet6 ${ipv6_route_args}
		done
		;;
	esac
}

network6_faith_setup() {
	case ${ipv6_faith_prefix} in
	[Nn][Oo] | '')
		;;
	*)
		sysctl net.inet6.ip6.keepfaith=1
		ifconfig faith0 create >/dev/null 2>&1
		ifconfig faith0 up
		for prefix in ${ipv6_faith_prefix}; do
			prefixlen=`expr "${prefix}" : ".*/\(.*\)"`
			case ${prefixlen} in
			'')
				prefixlen=96
				;;
			*)
				prefix=`expr "${prefix}" : \
					     "\(.*\)/${prefixlen}"`
				;;
			esac
			route add -inet6 ${prefix} -prefixlen ${prefixlen} ::1
			route change -inet6 ${prefix} -prefixlen ${prefixlen} \
				-ifp faith0
		done
		;;
	esac
}

network6_default_interface_setup() {
	# Choose IPv6 default interface if it is not clearly specified.
	case ${ipv6_default_interface} in
	'')
		for i in ${ipv6_network_interfaces}; do
			case $i in
			lo0|faith[0-9]*)
				continue
				;;
			esac
			laddr=`network6_getladdr $i exclude_tentative`
			case ${laddr} in
			'')
				;;
			*)
				ipv6_default_interface=$i
				break
				;;
			esac
		done
		;;
	esac

	# Disallow unicast packets without outgoing scope identifiers,
	# or route such packets to a "default" interface, if it is specified.
	route add -inet6 fe80:: -prefixlen 10 ::1 -reject
	case ${ipv6_default_interface} in
	[Nn][Oo] | '')
		route add -inet6 ff02:: -prefixlen 16 ::1 -reject
		;;
	*)
		laddr=`network6_getladdr ${ipv6_default_interface}`
		route add -inet6 ff02:: ${laddr} -prefixlen 16 -interface \
			-cloning

		# Disable installing the default interface with the
		# case net.inet6.ip6.forwarding=0 and
		# net.inet6.ip6.accept_rtadv=0, due to avoid conflict
		# between the default router list and the manual
		# configured default route.
		case ${ipv6_gateway_enable} in
		[Yy][Ee][Ss])
			;;
		*)
			if [ `sysctl -n net.inet6.ip6.accept_rtadv` -eq 1 ]
			then
				ndp -I ${ipv6_default_interface}
			fi
			;;
		esac
		;;
	esac
}

network6_getladdr() {
	ifconfig $1 2>/dev/null | while read proto addr rest; do
		case ${proto} in
		inet6)
			case ${addr} in
			fe80::*)
				if [ -z "$2" ]; then
					echo ${addr}
					return
				fi
				case ${rest} in
				*tentative*)
					continue
					;;
				*)
					echo ${addr}
					return
				esac
			esac
		esac
	done
}
OpenPOWER on IntegriCloud