Root/package/dnsmasq/files/dnsmasq.init

1#!/bin/sh /etc/rc.common
2# Copyright (C) 2007 OpenWrt.org
3
4START=60
5DNS_SERVERS=""
6DOMAIN=""
7
8dhcp_calc() {
9    local ip="$1"
10    local res=0
11
12    while [ -n "$ip" ]; do
13        part="${ip%%.*}"
14        res="$(($res * 256))"
15        res="$(($res + $part))"
16        [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
17    done
18    echo "$res"
19}
20
21append_bool() {
22    local section="$1"
23    local option="$2"
24    local value="$3"
25    local _loctmp
26    config_get_bool _loctmp "$section" "$option" 0
27    [ $_loctmp -gt 0 ] && append args "$value"
28}
29
30append_parm() {
31    local section="$1"
32    local option="$2"
33    local switch="$3"
34    local _loctmp
35    config_get _loctmp "$section" "$option"
36    [ -z "$_loctmp" ] && return 0
37    append args "$switch $_loctmp"
38}
39
40append_server() {
41    append args "-S $1"
42}
43
44append_interface() {
45    local ifname=$(uci_get_state network "$1" ifname "$1")
46    append args "-i $ifname"
47}
48
49append_notinterface() {
50    local ifname=$(uci_get_state network "$1" ifname "$1")
51    append args "-I $ifname"
52}
53
54append_addnhosts() {
55    append args "-H $1"
56}
57
58append_bogusnxdomain() {
59       append args "-B $1"
60}
61
62dnsmasq() {
63    local cfg="$1"
64    append_bool "$cfg" authoritative "-K"
65    append_bool "$cfg" nodaemon "-d"
66    append_bool "$cfg" domainneeded "-D"
67    append_bool "$cfg" filterwin2k "-f"
68    append_bool "$cfg" nohosts "-h"
69    append_bool "$cfg" nonegcache "-N"
70    append_bool "$cfg" strictorder "-o"
71    append_bool "$cfg" logqueries "-q"
72    append_bool "$cfg" noresolv "-R"
73    append_bool "$cfg" localise_queries "-y"
74    append_bool "$cfg" readethers "-Z"
75    append_bool "$cfg" dbus "-1"
76    append_bool "$cfg" boguspriv "-b"
77    append_bool "$cfg" expandhosts "-E"
78    append_bool "$cfg" enable_tftp "--enable-tftp"
79    append_bool "$cfg" nonwildcard "-z"
80
81    append_parm "$cfg" cachesize "-c"
82    append_parm "$cfg" dnsforwardmax "-0"
83    append_parm "$cfg" port "-p"
84    append_parm "$cfg" ednspacket_max "-P"
85    append_parm "$cfg" dhcpleasemax "-X"
86    append_parm "$cfg" "queryport" "-Q"
87    append_parm "$cfg" "domain" "-s"
88    append_parm "$cfg" "local" "-S"
89    config_list_foreach "$cfg" "server" append_server
90    config_list_foreach "$cfg" "interface" append_interface
91    config_list_foreach "$cfg" "notinterface" append_notinterface
92    config_list_foreach "$cfg" "addnhosts" append_addnhosts
93    config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
94    append_parm "$cfg" "leasefile" "-l"
95    append_parm "$cfg" "resolvfile" "-r"
96    append_parm "$cfg" "tftp_root" "--tftp-root"
97    append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
98
99    config_get DOMAIN "$cfg" domain
100
101    config_get_bool readethers "$cfg" readethers
102    [ "$readethers" = "1" ] && [ -e "/etc/ethers" ] || touch /etc/ethers
103
104    config_get leasefile $cfg leasefile
105    [ -n "$leasefile" ] && [ -e "$leasefile" ] || touch "$leasefile"
106    config_get_bool cachelocal "$cfg" cachelocal 1
107
108    config_get hostsfile "$cfg" dhcphostsfile
109    [ -e "$hostsfile" ] && append args "--dhcp-hostsfile=$hostsfile"
110
111    local rebind
112    config_get_bool rebind "$cfg" rebind_protection 1
113    [ $rebind -gt 0 ] && {
114        logger -t dnsmasq \
115            "DNS rebinding protection is active," \
116            "will discard upstream RFC1918 responses!"
117        append args "--stop-dns-rebind"
118
119        local rebind_localhost
120        config_get_bool rebind_localhost "$cfg" rebind_localhost 0
121        [ $rebind_localhost -gt 0 ] && {
122            logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
123            append args "--rebind-localhost-ok"
124        }
125
126        append_rebind_domain() {
127            logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
128            append args "--rebind-domain-ok=$1"
129        }
130
131        config_list_foreach "$cfg" rebind_domain append_rebind_domain
132    }
133}
134
135dhcp_subscrid_add() {
136    local cfg="$1"
137
138    config_get networkid "$cfg" networkid
139    [ -n "$networkid" ] || return 0
140
141    config_get subscriberid "$cfg" subscriberid
142    [ -n "$subscriberid" ] || return 0
143
144    append args "--dhcp-subscrid=$networkid,$subscriberid"
145
146    dhcp_option_add "$cfg" "$networkid"
147}
148
149dhcp_remoteid_add() {
150    local cfg="$1"
151
152    config_get networkid "$cfg" networkid
153    [ -n "$networkid" ] || return 0
154
155    config_get remoteid "$cfg" remoteid
156    [ -n "$remoteid" ] || return 0
157
158    append args "--dhcp-remoteid=$networkid,$remoteid"
159
160    dhcp_option_add "$cfg" "$networkid"
161}
162
163dhcp_circuitid_add() {
164    local cfg="$1"
165
166    config_get networkid "$cfg" networkid
167    [ -n "$networkid" ] || return 0
168
169    config_get circuitid "$cfg" circuitid
170    [ -n "$circuitid" ] || return 0
171
172    append args "--dhcp-circuitid=$networkid,$circuitid"
173
174    dhcp_option_add "$cfg" "$networkid"
175}
176
177dhcp_userclass_add() {
178    local cfg="$1"
179
180    config_get networkid "$cfg" networkid
181    [ -n "$networkid" ] || return 0
182
183    config_get userclass "$cfg" userclass
184    [ -n "$userclass" ] || return 0
185
186    append args "--dhcp-userclass=$networkid,$userclass"
187
188    dhcp_option_add "$cfg" "$networkid"
189}
190
191dhcp_vendorclass_add() {
192    local cfg="$1"
193
194    config_get networkid "$cfg" networkid
195    [ -n "$networkid" ] || return 0
196
197    config_get vendorclass "$cfg" vendorclass
198    [ -n "$vendorclass" ] || return 0
199
200    append args "--dhcp-vendorclass=$networkid,$vendorclass"
201
202    dhcp_option_add "$cfg" "$networkid"
203}
204
205dhcp_host_add() {
206    local cfg="$1"
207
208    config_get name "$cfg" name
209
210    config_get networkid "$cfg" networkid
211    [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid"
212
213    config_get ip "$cfg" ip
214    [ -n "$ip" ] || return 0
215
216    macs=""
217    config_get mac "$cfg" mac
218    for m in $mac; do append macs "$m" ","; done
219    [ -n "$macs" ] || return 0
220
221    append args "--dhcp-host=$macs,${networkid:+net:$networkid,}$ip${name:+,$name}"
222}
223
224dhcp_mac_add() {
225    local cfg="$1"
226
227    config_get networkid "$cfg" networkid
228    [ -n "$networkid" ] || return 0
229
230    config_get mac "$cfg" mac
231    [ -n "$mac" ] || return 0
232
233    append args "--dhcp-mac=$networkid,$mac"
234
235    dhcp_option_add "$cfg" "$networkid"
236}
237
238dhcp_boot_add() {
239    local cfg="$1"
240
241    config_get networkid "$cfg" networkid
242
243    config_get filename "$cfg" filename
244    [ -n "$filename" ] || return 0
245
246    config_get servername "$cfg" servername
247    [ -n "$servername" ] || return 0
248
249    config_get serveraddress "$cfg" serveraddress
250    [ -n "$serveraddress" ] || return 0
251
252    append args "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
253
254    dhcp_option_add "$cfg" "$networkid"
255}
256
257
258dhcp_add() {
259    local cfg="$1"
260    config_get net "$cfg" interface
261    [ -n "$net" ] || return 0
262
263    config_get networkid "$cfg" networkid
264    [ -n "$networkid" ] || networkid="$net"
265
266    config_get ifname "$net" ifname
267    [ -n "$ifname" ] || return 0
268
269    config_get dnsserver "$net" dns
270    [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
271        DNS_SERVERS="$DNS_SERVERS $dnsserver"
272    }
273
274    append_bool "$cfg" ignore "-2 '$ifname'" && return 0
275
276    config_get proto "$net" proto
277    [ static = "$proto" ] || return 0
278
279    config_get ipaddr "$net" ipaddr
280    config_get netmask "$cfg" netmask
281    [ -n "$netmask" ] || config_get netmask "$net" netmask
282
283    #check for an already active dhcp server on the interface, unless 'force' is set
284    config_get_bool force "$cfg" force 0
285    [ $force -gt 0 ] || {
286        udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && return 0
287    }
288
289    config_get start "$cfg" start
290    config_get limit "$cfg" limit
291    config_get leasetime "$cfg" leasetime
292    config_get options "$cfg" options
293    config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
294
295    leasetime="${leasetime:-12h}"
296    start="$(dhcp_calc "${start:-100}")"
297    limit="${limit:-150}"
298    eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
299    if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
300    append args "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
301
302    dhcp_option_add "$cfg" "$networkid"
303}
304
305dhcp_option_add() {
306    local cfg="$1"
307    local networkid="$2"
308
309    config_get dhcp_option "$cfg" dhcp_option
310    for o in $dhcp_option; do
311        append args "-O $networkid","$o"
312    done
313
314}
315
316dhcp_domain_add() {
317    local cfg="$1"
318    local ip name names
319
320    config_get names "$cfg" name
321    [ -n "$names" ] || return 0
322
323    config_get ip "$cfg" ip
324    [ -n "$ip" ] || return 0
325
326    local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
327    local raddr="${4:+$4.$3.$2.$1.in-addr.arpa}"
328
329    for name in $names; do
330        local fqdn="$name"
331
332        [ "${fqdn%.*}" == "$fqdn" ] && \
333            fqdn="$fqdn${DOMAIN:+.$DOMAIN}"
334
335        append args "-A /$fqdn/$ip"
336        
337        [ -n "$raddr" ] && {
338            append args "--ptr-record=$raddr,$fqdn"
339            raddr=""
340        }
341    done
342}
343
344start() {
345    include /lib/network
346    scan_interfaces
347    config_load dhcp
348
349    args=""
350    config_foreach dnsmasq dnsmasq
351    config_foreach dhcp_host_add host
352    config_foreach dhcp_boot_add boot
353    config_foreach dhcp_mac_add mac
354    config_foreach dhcp_vendorclass_add vendorclass
355    config_foreach dhcp_userclass_add userclass
356    config_foreach dhcp_circuitid_add circuitid
357    config_foreach dhcp_remoteid_add remoteid
358    config_foreach dhcp_subscrid_add subscrid
359    config_foreach dhcp_domain_add domain
360    config_foreach dhcp_add dhcp
361
362    /usr/sbin/dnsmasq $args && {
363        rm -f /tmp/resolv.conf
364        [ -n "$DOMAIN" ] && echo "search $DOMAIN" >> /tmp/resolv.conf
365        DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
366        for DNS_SERVER in $DNS_SERVERS ; do
367            echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
368        done
369    }
370}
371
372stop() {
373    [ -f /tmp/resolv.conf ] && {
374        rm -f /tmp/resolv.conf
375        ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
376    }
377    killall dnsmasq
378    return 0
379}
380

Archive Download this file



interactive