Root/package/network/services/dnsmasq/files/dnsmasq.init

1#!/bin/sh /etc/rc.common
2# Copyright (C) 2007-2012 OpenWrt.org
3
4START=60
5
6SERVICE_USE_PID=1
7
8DNS_SERVERS=""
9DOMAIN=""
10
11ADD_LOCAL_DOMAIN=1
12ADD_LOCAL_HOSTNAME=1
13
14CONFIGFILE="/var/etc/dnsmasq.conf"
15
16xappend() {
17    local value="$1"
18
19    echo "${value#--}" >> $CONFIGFILE
20}
21
22dhcp_calc() {
23    local ip="$1"
24    local res=0
25
26    while [ -n "$ip" ]; do
27        part="${ip%%.*}"
28        res="$(($res * 256))"
29        res="$(($res + $part))"
30        [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
31    done
32    echo "$res"
33}
34
35append_bool() {
36    local section="$1"
37    local option="$2"
38    local value="$3"
39    local _loctmp
40    config_get_bool _loctmp "$section" "$option" 0
41    [ $_loctmp -gt 0 ] && xappend "$value"
42}
43
44append_parm() {
45    local section="$1"
46    local option="$2"
47    local switch="$3"
48    local _loctmp
49    config_get _loctmp "$section" "$option"
50    [ -z "$_loctmp" ] && return 0
51    xappend "$switch=$_loctmp"
52}
53
54append_server() {
55    xappend "--server=$1"
56}
57
58append_address() {
59    xappend "--address=$1"
60}
61
62append_interface() {
63    local ifname=$(uci_get_state network "$1" ifname "$1")
64    xappend "--interface=$ifname"
65}
66
67append_notinterface() {
68    local ifname=$(uci_get_state network "$1" ifname "$1")
69    xappend "--except-interface=$ifname"
70}
71
72append_addnhosts() {
73    xappend "--addn-hosts=$1"
74}
75
76append_bogusnxdomain() {
77       xappend "--bogus-nxdomain=$1"
78}
79
80dnsmasq() {
81    local cfg="$1"
82    append_bool "$cfg" authoritative "--dhcp-authoritative"
83    append_bool "$cfg" nodaemon "--no-daemon"
84    append_bool "$cfg" domainneeded "--domain-needed"
85    append_bool "$cfg" filterwin2k "--filterwin2k"
86    append_bool "$cfg" nohosts "--no-hosts"
87    append_bool "$cfg" nonegcache "--no-negcache"
88    append_bool "$cfg" strictorder "--strict-order"
89    append_bool "$cfg" logqueries "--log-queries"
90    append_bool "$cfg" noresolv "--no-resolv"
91    append_bool "$cfg" localise_queries "--localise-queries"
92    append_bool "$cfg" readethers "--read-ethers"
93    append_bool "$cfg" dbus "--enable-dbus"
94    append_bool "$cfg" boguspriv "--bogus-priv"
95    append_bool "$cfg" expandhosts "--expand-hosts"
96    append_bool "$cfg" enable_tftp "--enable-tftp"
97    append_bool "$cfg" nonwildcard "--bind-interfaces"
98    append_bool "$cfg" fqdn "--dhcp-fqdn"
99
100    append_parm "$cfg" dhcpscript "--dhcp-script"
101    append_parm "$cfg" cachesize "--cache-size"
102    append_parm "$cfg" dnsforwardmax "--dns-forward-max"
103    append_parm "$cfg" port "--port"
104    append_parm "$cfg" ednspacket_max "--edns-packet-max"
105    append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
106    append_parm "$cfg" "queryport" "--query-port"
107    append_parm "$cfg" "domain" "--domain"
108    append_parm "$cfg" "local" "--server"
109    config_list_foreach "$cfg" "server" append_server
110    config_list_foreach "$cfg" "address" append_address
111    config_list_foreach "$cfg" "interface" append_interface
112    config_list_foreach "$cfg" "notinterface" append_notinterface
113    config_list_foreach "$cfg" "addnhosts" append_addnhosts
114    config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
115    append_parm "$cfg" "leasefile" "--dhcp-leasefile"
116    append_parm "$cfg" "resolvfile" "--resolv-file"
117    append_parm "$cfg" "tftp_root" "--tftp-root"
118    append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
119    append_parm "$cfg" "local_ttl" "--local-ttl"
120
121    config_get DOMAIN "$cfg" domain
122
123    config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
124    config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
125
126    config_get_bool readethers "$cfg" readethers
127    [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
128
129    config_get leasefile $cfg leasefile
130    [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
131    config_get_bool cachelocal "$cfg" cachelocal 1
132
133    config_get hostsfile "$cfg" dhcphostsfile
134    [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
135
136    local rebind
137    config_get_bool rebind "$cfg" rebind_protection 1
138    [ $rebind -gt 0 ] && {
139        logger -t dnsmasq \
140            "DNS rebinding protection is active," \
141            "will discard upstream RFC1918 responses!"
142        xappend "--stop-dns-rebind"
143
144        local rebind_localhost
145        config_get_bool rebind_localhost "$cfg" rebind_localhost 0
146        [ $rebind_localhost -gt 0 ] && {
147            logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
148            xappend "--rebind-localhost-ok"
149        }
150
151        append_rebind_domain() {
152            logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
153            xappend "--rebind-domain-ok=$1"
154        }
155
156        config_list_foreach "$cfg" rebind_domain append_rebind_domain
157    }
158
159    dhcp_option_add "$cfg" "" 0
160
161    echo >> $CONFIGFILE
162}
163
164dhcp_subscrid_add() {
165    local cfg="$1"
166
167    config_get networkid "$cfg" networkid
168    [ -n "$networkid" ] || return 0
169
170    config_get subscriberid "$cfg" subscriberid
171    [ -n "$subscriberid" ] || return 0
172
173    xappend "--dhcp-subscrid=$networkid,$subscriberid"
174
175    config_get_bool force "$cfg" force 0
176
177    dhcp_option_add "$cfg" "$networkid" "$force"
178}
179
180dhcp_remoteid_add() {
181    local cfg="$1"
182
183    config_get networkid "$cfg" networkid
184    [ -n "$networkid" ] || return 0
185
186    config_get remoteid "$cfg" remoteid
187    [ -n "$remoteid" ] || return 0
188
189    xappend "--dhcp-remoteid=$networkid,$remoteid"
190
191    config_get_bool force "$cfg" force 0
192
193    dhcp_option_add "$cfg" "$networkid" "$force"
194}
195
196dhcp_circuitid_add() {
197    local cfg="$1"
198
199    config_get networkid "$cfg" networkid
200    [ -n "$networkid" ] || return 0
201
202    config_get circuitid "$cfg" circuitid
203    [ -n "$circuitid" ] || return 0
204
205    xappend "--dhcp-circuitid=$networkid,$circuitid"
206
207    config_get_bool force "$cfg" force 0
208
209    dhcp_option_add "$cfg" "$networkid" "$force"
210}
211
212dhcp_userclass_add() {
213    local cfg="$1"
214
215    config_get networkid "$cfg" networkid
216    [ -n "$networkid" ] || return 0
217
218    config_get userclass "$cfg" userclass
219    [ -n "$userclass" ] || return 0
220
221    xappend "--dhcp-userclass=$networkid,$userclass"
222
223    config_get_bool force "$cfg" force 0
224
225    dhcp_option_add "$cfg" "$networkid" "$force"
226}
227
228dhcp_vendorclass_add() {
229    local cfg="$1"
230
231    config_get networkid "$cfg" networkid
232    [ -n "$networkid" ] || return 0
233
234    config_get vendorclass "$cfg" vendorclass
235    [ -n "$vendorclass" ] || return 0
236
237    xappend "--dhcp-vendorclass=$networkid,$vendorclass"
238
239    config_get_bool force "$cfg" force 0
240
241    dhcp_option_add "$cfg" "$networkid" "$force"
242}
243
244dhcp_host_add() {
245    local cfg="$1"
246
247    config_get_bool force "$cfg" force 0
248
249    config_get networkid "$cfg" networkid
250    [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
251
252    config_get name "$cfg" name
253    config_get ip "$cfg" ip
254    [ -n "$ip" -o -n "$name" ] || return 0
255
256    macs=""
257    config_get mac "$cfg" mac
258    for m in $mac; do append macs "$m" ","; done
259    [ -n "$macs" ] || return 0
260
261    config_get tag "$cfg" tag
262
263    xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${tag:+,set:$tag}${ip:+,$ip}${name:+,$name}"
264}
265
266dhcp_tag_add() {
267    local cfg="$1"
268
269    tag="$cfg"
270
271    [ -n "$tag" ] || return 0
272
273    config_get_bool force "$cfg" force 0
274    [ "$force" = "0" ] && force=
275
276    config_get option "$cfg" dhcp_option
277    for o in $option; do
278        xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
279    done
280}
281
282dhcp_mac_add() {
283    local cfg="$1"
284
285    config_get networkid "$cfg" networkid
286    [ -n "$networkid" ] || return 0
287
288    config_get mac "$cfg" mac
289    [ -n "$mac" ] || return 0
290
291    xappend "--dhcp-mac=$networkid,$mac"
292
293    dhcp_option_add "$cfg" "$networkid"
294}
295
296dhcp_boot_add() {
297    local cfg="$1"
298
299    config_get networkid "$cfg" networkid
300
301    config_get filename "$cfg" filename
302    [ -n "$filename" ] || return 0
303
304    config_get servername "$cfg" servername
305    [ -n "$servername" ] || return 0
306
307    config_get serveraddress "$cfg" serveraddress
308    [ -n "$serveraddress" ] || return 0
309
310    xappend "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
311
312    config_get_bool force "$cfg" force 0
313
314    dhcp_option_add "$cfg" "$networkid" "$force"
315}
316
317
318dhcp_add() {
319    local cfg="$1"
320    config_get net "$cfg" interface
321    [ -n "$net" ] || return 0
322
323    config_get networkid "$cfg" networkid
324    [ -n "$networkid" ] || networkid="$net"
325
326    config_get ifname "$net" ifname
327    [ -n "$ifname" ] || return 0
328
329    config_get dnsserver "$net" dns
330    [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
331        DNS_SERVERS="$DNS_SERVERS $dnsserver"
332    }
333
334    append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0
335
336    config_get proto "$net" proto
337    [ static = "$proto" ] || return 0
338
339    config_get ipaddr "$net" ipaddr
340    config_get netmask "$cfg" netmask
341    [ -n "$netmask" ] || config_get netmask "$net" netmask
342
343    #check for an already active dhcp server on the interface, unless 'force' is set
344    config_get_bool force "$cfg" force 0
345    [ $force -gt 0 ] || {
346        udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && {
347            logger -t dnsmasq \
348                "found already running DHCP-server on interface '$ifname'" \
349                "refusing to start, use 'option force 1' to override"
350            return 0
351        }
352    }
353
354    config_get start "$cfg" start
355    config_get limit "$cfg" limit
356    config_get leasetime "$cfg" leasetime
357    config_get options "$cfg" options
358    config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
359
360    leasetime="${leasetime:-12h}"
361    start="$(dhcp_calc "${start:-100}")"
362    limit="${limit:-150}"
363    [ "$limit" -gt 0 ] && limit=$((limit-1))
364    eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
365    if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
366    xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
367
368    dhcp_option_add "$cfg" "$networkid"
369}
370
371dhcp_option_add() {
372    local cfg="$1"
373    local networkid="$2"
374    local force="$3"
375
376    [ "$force" = "0" ] && force=
377
378    config_get dhcp_option "$cfg" dhcp_option
379    for o in $dhcp_option; do
380        xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o"
381    done
382
383}
384
385dhcp_domain_add() {
386    local cfg="$1"
387    local ip name names
388
389    config_get names "$cfg" name "$2"
390    [ -n "$names" ] || return 0
391
392    config_get ip "$cfg" ip "$3"
393    [ -n "$ip" ] || return 0
394
395    local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
396    local raddr="${4:+$4.$3.$2.$1.in-addr.arpa}"
397
398    for name in $names; do
399        local fqdn="$name"
400
401        [ "${fqdn%.*}" == "$fqdn" ] && \
402            fqdn="$fqdn${DOMAIN:+.$DOMAIN}"
403
404        xappend "--address=/$fqdn/$ip"
405
406        [ -n "$raddr" ] && {
407            xappend "--ptr-record=$raddr,$fqdn"
408            raddr=""
409        }
410    done
411}
412
413dhcp_srv_add() {
414    local cfg="$1"
415
416    config_get srv "$cfg" srv
417    [ -n "$srv" ] || return 0
418
419    config_get target "$cfg" target
420    [ -n "$target" ] || return 0
421
422    config_get port "$cfg" port
423    [ -n "$port" ] || return 0
424
425    config_get class "$cfg" class
426    config_get weight "$cfg" weight
427
428    local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
429
430    xappend "--srv-host=$service"
431}
432
433dhcp_mx_add() {
434    local cfg="$1"
435    local domain relay pref
436
437    config_get domain "$cfg" domain
438    [ -n "$domain" ] || return 0
439
440    config_get relay "$cfg" relay
441    [ -n "$relay" ] || return 0
442
443    config_get pref "$cfg" pref 0
444
445    local service="$domain,$relay,$pref"
446
447    xappend "--mx-host=$service"
448}
449
450dhcp_cname_add() {
451    local cfg="$1"
452    local cname target
453
454    config_get cname "$cfg" cname
455    [ -n "$cname" ] || return 0
456
457    config_get target "$cfg" target
458    [ -n "$target" ] || return 0
459
460    xappend "--cname=${cname},${target}"
461}
462
463start() {
464    include /lib/network
465    scan_interfaces
466
467    local lanaddr
468    config_get lanaddr "lan" ipaddr
469
470    config_load dhcp
471
472    # before we can call xappend
473    mkdir -p $(dirname $CONFIGFILE)
474
475    echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
476
477    # if we did this last, we could override auto-generated config
478    [ -f /etc/dnsmasq.conf ] && {
479        xappend "--conf-file=/etc/dnsmasq.conf"
480    }
481
482    args=""
483    config_foreach dnsmasq dnsmasq
484    config_foreach dhcp_host_add host
485    echo >> $CONFIGFILE
486    config_foreach dhcp_boot_add boot
487    config_foreach dhcp_mac_add mac
488    config_foreach dhcp_tag_add tag
489    config_foreach dhcp_vendorclass_add vendorclass
490    config_foreach dhcp_userclass_add userclass
491    config_foreach dhcp_circuitid_add circuitid
492    config_foreach dhcp_remoteid_add remoteid
493    config_foreach dhcp_subscrid_add subscrid
494    config_foreach dhcp_domain_add domain
495    echo >> $CONFIGFILE
496    config_foreach dhcp_srv_add srvhost
497    config_foreach dhcp_mx_add mxhost
498    echo >> $CONFIGFILE
499    config_foreach dhcp_add dhcp
500    echo >> $CONFIGFILE
501    config_foreach dhcp_cname_add cname
502    echo >> $CONFIGFILE
503
504    # add own hostname
505    [ $ADD_LOCAL_HOSTNAME -eq 1 ] && [ -n "$lanaddr" ] && {
506        local hostname="$(uci_get system.@system[0].hostname)"
507        dhcp_domain_add "" "${hostname:-OpenWrt}" "$lanaddr"
508    }
509
510    service_start /usr/sbin/dnsmasq -C $CONFIGFILE && {
511        rm -f /tmp/resolv.conf
512        [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
513            echo "search $DOMAIN" >> /tmp/resolv.conf
514        }
515        DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
516        for DNS_SERVER in $DNS_SERVERS ; do
517            echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
518        done
519    }
520}
521
522stop() {
523    service_stop /usr/sbin/dnsmasq && {
524        [ -f /tmp/resolv.conf ] && {
525            rm -f /tmp/resolv.conf
526            ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
527        }
528    }
529}
530

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