summaryrefslogtreecommitdiff
path: root/package/dnsmasq/files/dnsmasq.init
blob: 49291a5c8ab7b50f063b78f171345dae8bcdff05 (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
#!/bin/sh /etc/rc.common
# Copyright (C) 2007 OpenWrt.org

START=60
DNS_SERVERS=""
DOMAIN=""

dhcp_calc() {
	local ip="$1"
	local res=0

	while [ -n "$ip" ]; do
		part="${ip%%.*}"
		res="$(($res * 256))"
		res="$(($res + $part))"
		[ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
	done
	echo "$res"
}

append_bool() {
	local section="$1"
	local option="$2"
	local value="$3"
	local _loctmp
	config_get_bool _loctmp "$section" "$option"
	[ "$_loctmp" -gt 0 ] && append args "$value"
}

append_parm() {
	local section="$1"
	local option="$2"
	local switch="$3"
	local _loctmp
	config_get _loctmp "$section" "$option"
	[ -z "$_loctmp" ] && return 0
	append args "$switch $_loctmp"
}

append_server() {
	append args "-S $1"
}

append_interface() {
	append args "-i $1"
}

append_notinterface() {
	append args "-I $1"
}

append_addnhosts() {
	append args "-H $1"
}

dnsmasq() {
	local cfg="$1"
	append_bool "$cfg" authoritative "-K"
	append_bool "$cfg" nodaemon "-d"
	append_bool "$cfg" domainneeded "-D"
	append_bool "$cfg" filterwin2k "-f"
	append_bool "$cfg" nohosts "-h"
	append_bool "$cfg" nonegcache "-N"
	append_bool "$cfg" strictorder "-o"
	append_bool "$cfg" logqueries "-q"
	append_bool "$cfg" noresolv "-R"
	append_bool "$cfg" localise_queries "-y"
	append_bool "$cfg" readethers "-Z"
	append_bool "$cfg" dbus "-1"
	append_bool "$cfg" boguspriv "-b"
	append_bool "$cfg" expandhosts "-E"
	append_bool "$cfg" enable_tftp "--enable-tftp"
	append_bool "$cfg" nonwildcard "-z"

	append_parm "$cfg" dnsforwardmax "-0"
	append_parm "$cfg" port "-p"
	append_parm "$cfg" ednspacket_max "-P"
	append_parm "$cfg" dhcpleasemax "-X"
	append_parm "$cfg" "queryport" "-Q"
	append_parm "$cfg" "domain" "-s"
	append_parm "$cfg" "local" "-S"
	config_list_foreach "$cfg" "server" append_server
	config_list_foreach "$cfg" "interface" append_interface
	config_list_foreach "$cfg" "notinterface" append_notinterface
	config_list_foreach "$cfg" "addnhosts" append_addnhosts
	append_parm "$cfg" "leasefile" "-l"
	append_parm "$cfg" "resolvfile" "-r"
	append_parm "$cfg" "tftp_root" "--tftp-root"
	append_parm "$cfg" "dhcp_boot" "--dhcp-boot"

	config_get DOMAIN "$cfg" domain

	config_get_bool readethers "$cfg" readethers
	[ "$readethers" = "1" ] && [ -e "/etc/ethers" ] || touch /etc/ethers

	config_get leasefile $cfg leasefile
	[ -e "$leasefile" ] || touch "$leasefile"
	config_get_bool cachelocal "$cfg" cachelocal 1

	config_get hostsfile "$cfg" dhcphostsfile
	[ -e "$hostsfile" ] && append args "--dhcp-hostsfile=$hostsfile"

	local rebind
	config_get_bool rebind "$cfg" rebind_protection 1
	[ $rebind -gt 0 ] && {
		logger -t dnsmasq \
			"DNS rebinding protection is active," \
			"will discard upstream RFC1918 responses!"
		append args "--stop-dns-rebind"

		local rebind_localhost
		config_get_bool rebind_localhost "$cfg" rebind_localhost 0
		[ $rebind_localhost -gt 0 ] && {
			logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
			append args "--rebind-localhost-ok"
		}

		append_rebind_domain() {
			logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
			append args "--rebind-domain-ok=$1"
		}

		config_list_foreach "$cfg" rebind_domain append_rebind_domain
	}
}

dhcp_subscrid_add() {
	local cfg="$1"

	config_get networkid "$cfg" networkid
	[ -n "$networkid" ] || return 0

	config_get subscriberid "$cfg" subscriberid
	[ -n "$subscriberid" ] || return 0

	append args "--dhcp-subscrid=$networkid,$subscriberid"

	dhcp_option_add "$cfg" "$networkid"
}

dhcp_remoteid_add() {
	local cfg="$1"

	config_get networkid "$cfg" networkid
	[ -n "$networkid" ] || return 0

	config_get remoteid "$cfg" remoteid
	[ -n "$remoteid" ] || return 0

	append args "--dhcp-remoteid=$networkid,$remoteid"

	dhcp_option_add "$cfg" "$networkid"
}

dhcp_circuitid_add() {
	local cfg="$1"

	config_get networkid "$cfg" networkid
	[ -n "$networkid" ] || return 0

	config_get circuitid "$cfg" circuitid
	[ -n "$circuitid" ] || return 0

	append args "--dhcp-circuitid=$networkid,$circuitid"

	dhcp_option_add "$cfg" "$networkid"
}

dhcp_userclass_add() {
	local cfg="$1"

	config_get networkid "$cfg" networkid
	[ -n "$networkid" ] || return 0

	config_get userclass "$cfg" userclass
	[ -n "$userclass" ] || return 0

	append args "--dhcp-userclass=$networkid,$userclass"

	dhcp_option_add "$cfg" "$networkid"
}

dhcp_vendorclass_add() {
	local cfg="$1"

	config_get networkid "$cfg" networkid
	[ -n "$networkid" ] || return 0

	config_get vendorclass "$cfg" vendorclass
	[ -n "$vendorclass" ] || return 0

	append args "--dhcp-vendorclass=$networkid,$vendorclass"

	dhcp_option_add "$cfg" "$networkid"
}

dhcp_host_add() {
	local cfg="$1"

	config_get name "$cfg" name

	config_get networkid "$cfg" networkid
	[ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid"

	config_get ip "$cfg" ip
	[ -n "$ip" ] || return 0

	macs=""
	config_get mac "$cfg" mac
	for m in $mac; do append macs "$m" ","; done
	[ -n "$macs" ] || return 0

	append args "--dhcp-host=$macs,${networkid:+net:$networkid,}$ip${name:+,$name}"
}

dhcp_mac_add() {
	local cfg="$1"

	config_get networkid "$cfg" networkid
	[ -n "$networkid" ] || return 0

	config_get mac "$cfg" mac
	[ -n "$mac" ] || return 0

	append args "--dhcp-mac=$networkid,$mac"

	dhcp_option_add "$cfg" "$networkid"
}

dhcp_boot_add() {
	local cfg="$1"

	config_get networkid "$cfg" networkid

	config_get filename "$cfg" filename
	[ -n "$filename" ] || return 0

	config_get servername "$cfg" servername
	[ -n "$servername" ] || return 0

	config_get serveraddress "$cfg" serveraddress
	[ -n "$serveraddress" ] || return 0

	append args "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"

	dhcp_option_add "$cfg" "$networkid"
}


dhcp_add() {
	local cfg="$1"
	config_get net "$cfg" interface
	[ -n "$net" ] || return 0

	config_get networkid "$cfg" networkid
	[ -n "$networkid" ] || networkid="$net"

	config_get ifname "$net" ifname
	[ -n "$ifname" ] || return 0

	config_get dnsserver "$net" dns
	[ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
		DNS_SERVERS="$DNS_SERVERS $dnsserver"
	}

	append_bool "$cfg" ignore "-2 '$ifname'" && return 0

	config_get proto "$net" proto
	[ static = "$proto" ] || return 0

	config_get ipaddr "$net" ipaddr
	config_get netmask "$cfg" netmask
	[ -n "$netmask" ] || config_get netmask "$net" netmask

	#check for an already active dhcp server on the interface, unless 'force' is set
	config_get_bool force "$cfg" force 0
	[ "$force" -gt 0 ] || {
		udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && return 0
	}

	config_get start "$cfg" start
	config_get limit "$cfg" limit
	config_get leasetime "$cfg" leasetime
	config_get options "$cfg" options
	config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1

	leasetime="${leasetime:-12h}"
	start="$(dhcp_calc "${start:-100}")"
	limit="${limit:-150}"
	eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
	if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
	append args "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"

	dhcp_option_add "$cfg" "$networkid"
}

dhcp_option_add() {
	local cfg="$1"
	local networkid="$2"

	config_get dhcp_option "$cfg" dhcp_option
	for o in $dhcp_option; do
		append args "-O $networkid","$o"
	done

}

dhcp_domain_add() {
	local cfg="$1"
	local ip name names

	config_get names "$cfg" name
	[ -n "$names" ] || return 0

	config_get ip "$cfg" ip
	[ -n "$ip" ] || return 0

	local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
	local raddr="${4:+$4.$3.$2.$1.in-addr.arpa}"

	for name in $names; do
		local fqdn="$name"

		[ "${fqdn%.*}" == "$fqdn" ] && \
			fqdn="$fqdn${DOMAIN:+.$DOMAIN}"

		append args "-A /$fqdn/$ip"
		
		[ -n "$raddr" ] && {
			append args "--ptr-record=$raddr,$fqdn"
			raddr=""
		}
	done
}

dhcp_srv_add() {
	local cfg="$1"

	config_get srv "$cfg" srv
	[ -n "$srv" ] || return 0

	config_get target "$cfg" target
	[ -n "$target" ] || return 0

	config_get port "$cfg" port

	local service="$srv,$target"
	[ -n "$port" ] && service="$service,$port"

	append args "-W $service"
}

start() {
	include /lib/network
	scan_interfaces
	config_load dhcp

	args=""
	config_foreach dnsmasq dnsmasq
	config_foreach dhcp_host_add host
	config_foreach dhcp_boot_add boot
	config_foreach dhcp_mac_add mac
	config_foreach dhcp_vendorclass_add vendorclass
	config_foreach dhcp_userclass_add userclass
	config_foreach dhcp_circuitid_add circuitid
	config_foreach dhcp_remoteid_add remoteid
	config_foreach dhcp_subscrid_add subscrid
	config_foreach dhcp_domain_add domain
	config_foreach dhcp_srv_add srvhost
	config_foreach dhcp_add dhcp

	/usr/sbin/dnsmasq $args && {
		rm -f /tmp/resolv.conf
		[ -n "$DOMAIN" ] && echo "search $DOMAIN" >> /tmp/resolv.conf
		DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
		for DNS_SERVER in $DNS_SERVERS ; do
			echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
		done
	}
}

stop() {
	[ -f /tmp/resolv.conf ] && {
		rm -f /tmp/resolv.conf
		ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
	}
	killall dnsmasq
	return 0
}