1 #!/bin/sh /etc/rc.common
2 # Copyright (C) 2007-2012 OpenWrt.org
15 CONFIGFILE="/var/etc/dnsmasq.conf"
16 HOSTFILE="/tmp/hosts/dhcp"
17 TRUSTANCHORSFILE="/usr/share/dnsmasq/trust-anchors.conf"
18 TIMESTAMPFILE="/etc/dnsmasq.time"
19 TIMEVALIDFILE="/var/state/dnsmasqsec"
24 echo "${value#--}" >> $CONFIGFILE
29 local hex="${2#0x}" # strip optional "0x" prefix
31 if [ -n "${hex//[0-9a-fA-F]/}" ]; then
32 # is invalid hex literal
36 # convert into host id
39 $(((0x$hex >> 16) % 65536)) \
50 while [ -n "$ip" ]; do
53 res="$(($res + $part))"
54 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
61 local stamp="/var/run/dnsmasq.$ifname.dhcp"
64 [ -s "$stamp" ] && return $(cat "$stamp")
66 udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
70 "found already running DHCP-server on interface '$ifname'" \
71 "refusing to start, use 'option force 1' to override"
78 pidof dnsmasq >/dev/null || \
79 logger -t dnsmasq "$@"
87 config_get_bool _loctmp "$section" "$option" 0
88 [ $_loctmp -gt 0 ] && xappend "$value"
97 config_get _loctmp "$section" "$option" "$default"
98 [ -z "$_loctmp" ] && return 0
99 xappend "$switch=$_loctmp"
103 xappend "--server=$1"
107 xappend "--address=$1"
115 local ifname=$(uci_get_state network "$1" ifname "$1")
116 xappend "--interface=$ifname"
119 append_notinterface() {
120 local ifname=$(uci_get_state network "$1" ifname "$1")
121 xappend "--except-interface=$ifname"
125 xappend "--addn-hosts=$1"
128 append_bogusnxdomain() {
129 xappend "--bogus-nxdomain=$1"
132 append_pxe_service() {
133 xappend "--pxe-service=$1"
138 append_bool "$cfg" authoritative "--dhcp-authoritative"
139 append_bool "$cfg" nodaemon "--no-daemon"
140 append_bool "$cfg" domainneeded "--domain-needed"
141 append_bool "$cfg" filterwin2k "--filterwin2k"
142 append_bool "$cfg" nohosts "--no-hosts"
143 append_bool "$cfg" nonegcache "--no-negcache"
144 append_bool "$cfg" strictorder "--strict-order"
145 append_bool "$cfg" logqueries "--log-queries=extra"
146 append_bool "$cfg" noresolv "--no-resolv"
147 append_bool "$cfg" localise_queries "--localise-queries"
148 append_bool "$cfg" readethers "--read-ethers"
149 append_bool "$cfg" dbus "--enable-dbus"
150 append_bool "$cfg" boguspriv "--bogus-priv"
151 append_bool "$cfg" expandhosts "--expand-hosts"
152 config_get tftp_root "$cfg" "tftp_root"
153 [ -d "$tftp_root" ] && append_bool "$cfg" enable_tftp "--enable-tftp"
154 append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
155 append_bool "$cfg" nonwildcard "--bind-dynamic"
156 append_bool "$cfg" fqdn "--dhcp-fqdn"
157 append_bool "$cfg" proxydnssec "--proxy-dnssec"
158 append_bool "$cfg" localservice "--local-service"
159 append_bool "$cfg" quietdhcp "--quiet-dhcp"
160 append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
161 append_bool "$cfg" allservers "--all-servers"
162 append_bool "$cfg" noping "--no-ping"
164 append_parm "$cfg" dhcpscript "--dhcp-script"
165 append_parm "$cfg" cachesize "--cache-size"
166 append_parm "$cfg" dnsforwardmax "--dns-forward-max"
167 append_parm "$cfg" port "--port"
168 append_parm "$cfg" ednspacket_max "--edns-packet-max"
169 append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
170 append_parm "$cfg" "queryport" "--query-port"
171 append_parm "$cfg" "minport" "--min-port"
172 append_parm "$cfg" "maxport" "--max-port"
173 append_parm "$cfg" "domain" "--domain"
174 append_parm "$cfg" "local" "--server"
175 config_list_foreach "$cfg" "server" append_server
176 config_list_foreach "$cfg" "address" append_address
177 config_list_foreach "$cfg" "ipset" append_ipset
178 config_list_foreach "$cfg" "interface" append_interface
179 config_list_foreach "$cfg" "notinterface" append_notinterface
180 config_list_foreach "$cfg" "addnhosts" append_addnhosts
181 config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
182 append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
183 append_parm "$cfg" "resolvfile" "--resolv-file" "/tmp/resolv.conf.auto"
184 append_parm "$cfg" "serversfile" "--servers-file"
185 append_parm "$cfg" "tftp_root" "--tftp-root"
186 append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
187 append_parm "$cfg" "local_ttl" "--local-ttl"
188 append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
189 config_list_foreach "$cfg" "pxe_service" append_pxe_service
190 config_get DOMAIN "$cfg" domain
192 config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
193 config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
195 config_get_bool readethers "$cfg" readethers
196 [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
198 config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
199 [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
200 config_get_bool cachelocal "$cfg" cachelocal 1
202 config_get_bool noresolv "$cfg" noresolv 0
203 if [ "$noresolv" != "1" ]; then
204 config_get resolvfile "$cfg" resolvfile "/tmp/resolv.conf.auto"
205 # So jail doesn't complain if file missing
206 [ -n "$resolvfile" -a \! -e "$resolvfile" ] && touch "$resolvfile"
209 config_get hostsfile "$cfg" dhcphostsfile
210 [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
213 config_get_bool rebind "$cfg" rebind_protection 1
214 [ $rebind -gt 0 ] && {
216 "DNS rebinding protection is active," \
217 "will discard upstream RFC1918 responses!"
218 xappend "--stop-dns-rebind"
220 local rebind_localhost
221 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
222 [ $rebind_localhost -gt 0 ] && {
223 log_once "Allowing 127.0.0.0/8 responses"
224 xappend "--rebind-localhost-ok"
227 append_rebind_domain() {
228 log_once "Allowing RFC1918 responses for domain $1"
229 xappend "--rebind-domain-ok=$1"
232 config_list_foreach "$cfg" rebind_domain append_rebind_domain
235 config_get_bool dnssec "$cfg" dnssec 0
236 [ "$dnssec" -gt 0 ] && {
237 xappend "--conf-file=$TRUSTANCHORSFILE"
239 [ -x /etc/init.d/sysntpd ] && {
240 /etc/init.d/sysntpd enabled
241 [ "$?" -ne 0 -o "$(uci_get system.ntp.enabled)" = "1" ] && {
242 [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
245 append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
248 dhcp_option_add "$cfg" "" 0
250 xappend "--dhcp-broadcast=tag:needs-broadcast"
252 mkdir -p /tmp/hosts /tmp/dnsmasq.d
253 xappend "--addn-hosts=/tmp/hosts"
254 xappend "--conf-dir=/tmp/dnsmasq.d"
255 xappend "--user=dnsmasq"
256 xappend "--group=dnsmasq"
260 config_get_bool enable_tftp "$cfg" enable_tftp 0
261 [ "$enable_tftp" -gt 0 ] && {
262 config_get tftp_root "$cfg" tftp_root
263 append EXTRA_MOUNT $tftp_root
267 dhcp_subscrid_add() {
270 config_get networkid "$cfg" networkid
271 [ -n "$networkid" ] || return 0
273 config_get subscriberid "$cfg" subscriberid
274 [ -n "$subscriberid" ] || return 0
276 xappend "--dhcp-subscrid=$networkid,$subscriberid"
278 config_get_bool force "$cfg" force 0
280 dhcp_option_add "$cfg" "$networkid" "$force"
283 dhcp_remoteid_add() {
286 config_get networkid "$cfg" networkid
287 [ -n "$networkid" ] || return 0
289 config_get remoteid "$cfg" remoteid
290 [ -n "$remoteid" ] || return 0
292 xappend "--dhcp-remoteid=$networkid,$remoteid"
294 config_get_bool force "$cfg" force 0
296 dhcp_option_add "$cfg" "$networkid" "$force"
299 dhcp_circuitid_add() {
302 config_get networkid "$cfg" networkid
303 [ -n "$networkid" ] || return 0
305 config_get circuitid "$cfg" circuitid
306 [ -n "$circuitid" ] || return 0
308 xappend "--dhcp-circuitid=$networkid,$circuitid"
310 config_get_bool force "$cfg" force 0
312 dhcp_option_add "$cfg" "$networkid" "$force"
315 dhcp_userclass_add() {
318 config_get networkid "$cfg" networkid
319 [ -n "$networkid" ] || return 0
321 config_get userclass "$cfg" userclass
322 [ -n "$userclass" ] || return 0
324 xappend "--dhcp-userclass=$networkid,$userclass"
326 config_get_bool force "$cfg" force 0
328 dhcp_option_add "$cfg" "$networkid" "$force"
331 dhcp_vendorclass_add() {
334 config_get networkid "$cfg" networkid
335 [ -n "$networkid" ] || return 0
337 config_get vendorclass "$cfg" vendorclass
338 [ -n "$vendorclass" ] || return 0
340 xappend "--dhcp-vendorclass=$networkid,$vendorclass"
342 config_get_bool force "$cfg" force 0
344 dhcp_option_add "$cfg" "$networkid" "$force"
350 config_get_bool force "$cfg" force 0
352 config_get networkid "$cfg" networkid
353 [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
355 config_get_bool enable "$cfg" enable 1
356 [ "$enable" = "0" ] && return 0
358 config_get name "$cfg" name
359 config_get ip "$cfg" ip
360 [ -n "$ip" -o -n "$name" ] || return 0
362 config_get_bool dns "$cfg" dns 0
363 [ "$dns" = "1" -a -n "$ip" -a -n "$name" ] && {
364 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE
367 config_get mac "$cfg" mac
368 if [ -n "$mac" ]; then
369 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
371 for m in $mac; do append macs "$m" ","; done
373 # --dhcp-host=lap,192.168.0.199
374 [ -n "$name" ] || return 0
379 config_get tag "$cfg" tag
381 if [ "$DHCPv6CAPABLE" -eq 1 ]; then
382 config_get hostid "$cfg" hostid
383 if [ -n "$hostid" ]; then
384 hex_to_hostid hostid "$hostid"
388 config_get_bool broadcast "$cfg" broadcast 0
389 [ "$broadcast" = "0" ] && broadcast=
391 config_get leasetime "$cfg" leasetime
393 xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${broadcast:+,set:needs-broadcast}${tag:+,set:$tag}${ip:+,$ip${hostid:+,[::$hostid]}}${name:+,$name}${leasetime:+,$leasetime}"
401 [ -n "$tag" ] || return 0
403 config_get_bool force "$cfg" force 0
404 [ "$force" = "0" ] && force=
406 config_get option "$cfg" dhcp_option
408 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
415 config_get networkid "$cfg" networkid
416 [ -n "$networkid" ] || return 0
418 config_get mac "$cfg" mac
419 [ -n "$mac" ] || return 0
421 xappend "--dhcp-mac=$networkid,$mac"
423 dhcp_option_add "$cfg" "$networkid"
429 config_get networkid "$cfg" networkid
431 config_get filename "$cfg" filename
432 [ -n "$filename" ] || return 0
434 config_get servername "$cfg" servername
435 config_get serveraddress "$cfg" serveraddress
437 [ -n "$serveraddress" -a ! -n "$servername" ] && return 0
439 xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
441 config_get_bool force "$cfg" force 0
443 dhcp_option_add "$cfg" "$networkid" "$force"
449 config_get net "$cfg" interface
450 [ -n "$net" ] || return 0
452 config_get dhcpv4 "$cfg" dhcpv4
453 [ "$dhcpv4" != "disabled" ] || return 0
455 config_get networkid "$cfg" networkid
456 [ -n "$networkid" ] || networkid="$net"
458 network_get_subnet subnet "$net" || return 0
459 network_get_device ifname "$net" || return 0
460 network_get_protocol proto "$net" || return 0
462 [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
463 DNS_SERVERS="$DNS_SERVERS $dnsserver"
466 append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0
468 # Do not support non-static interfaces for now
469 [ static = "$proto" ] || return 0
471 # Override interface netmask with dhcp config if applicable
472 config_get netmask "$cfg" netmask "${subnet##*/}"
474 #check for an already active dhcp server on the interface, unless 'force' is set
475 config_get_bool force "$cfg" force 0
476 [ $force -gt 0 ] || dhcp_check "$ifname" || return 0
478 config_get start "$cfg" start
479 config_get limit "$cfg" limit
480 config_get leasetime "$cfg" leasetime
481 config_get options "$cfg" options
482 config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
484 leasetime="${leasetime:-12h}"
485 start="$(dhcp_calc "${start:-100}")"
486 limit="${limit:-150}"
487 [ "$limit" -gt 0 ] && limit=$((limit-1))
488 eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
489 if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
490 xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
492 dhcp_option_add "$cfg" "$networkid"
500 [ "$force" = "0" ] && force=
502 config_get dhcp_option "$cfg" dhcp_option
503 for o in $dhcp_option; do
504 xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o"
511 local ip name names record
513 config_get names "$cfg" name "$2"
514 [ -n "$names" ] || return 0
516 config_get ip "$cfg" ip "$3"
517 [ -n "$ip" ] || return 0
519 for name in $names; do
520 record="${record:+$record }$name"
523 echo "$ip $record" >> $HOSTFILE
529 config_get srv "$cfg" srv
530 [ -n "$srv" ] || return 0
532 config_get target "$cfg" target
533 [ -n "$target" ] || return 0
535 config_get port "$cfg" port
536 [ -n "$port" ] || return 0
538 config_get class "$cfg" class
539 config_get weight "$cfg" weight
541 local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
543 xappend "--srv-host=$service"
548 local domain relay pref
550 config_get domain "$cfg" domain
551 [ -n "$domain" ] || return 0
553 config_get relay "$cfg" relay
554 [ -n "$relay" ] || return 0
556 config_get pref "$cfg" pref 0
558 local service="$domain,$relay,$pref"
560 xappend "--mx-host=$service"
567 config_get cname "$cfg" cname
568 [ -n "$cname" ] || return 0
570 config_get target "$cfg" target
571 [ -n "$target" ] || return 0
573 xappend "--cname=${cname},${target}"
576 dhcp_hostrecord_add() {
578 local names addresses record val
580 config_get names "$cfg" name "$2"
581 if [ -z "$names" ]; then
585 config_get addresses "$cfg" ip "$3"
586 if [ -z "$addresses" ]; then
590 for val in $names $addresses; do
591 record="${record:+$record,}$val"
594 xappend "--host-record=$record"
599 local local_addr server_addr interface
601 config_get local_addr "$cfg" local_addr
602 [ -n "$local_addr" ] || return 0
604 config_get server_addr "$cfg" server_addr
605 [ -n "$server_addr" ] || return 0
607 config_get interface "$cfg" interface
608 if [ -z "$interface" ]; then
609 xappend "--dhcp-relay=$local_addr,$server_addr"
611 xappend "--dhcp-relay=$local_addr,$server_addr,$interface"
617 procd_add_reload_trigger "dhcp"
621 # Will be launched through hotplug
626 include /lib/functions
630 # before we can call xappend
631 mkdir -p /var/run/dnsmasq/
632 mkdir -p $(dirname $CONFIGFILE)
633 mkdir -p /var/lib/misc
634 touch /tmp/dhcp.leases
636 [ -f "$TIMESTAMPFILE" ] && rm -f "$TIMESTAMPFILE"
638 echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
639 echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE
641 # if we did this last, we could override auto-generated config
642 [ -f /etc/dnsmasq.conf ] && {
643 xappend "--conf-file=/etc/dnsmasq.conf"
646 $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
649 config_foreach dnsmasq dnsmasq
650 config_foreach dhcp_host_add host
652 config_foreach dhcp_boot_add boot
653 config_foreach dhcp_mac_add mac
654 config_foreach dhcp_tag_add tag
655 config_foreach dhcp_vendorclass_add vendorclass
656 config_foreach dhcp_userclass_add userclass
657 config_foreach dhcp_circuitid_add circuitid
658 config_foreach dhcp_remoteid_add remoteid
659 config_foreach dhcp_subscrid_add subscrid
660 config_foreach dhcp_domain_add domain
661 config_foreach dhcp_hostrecord_add hostrecord
662 config_foreach dhcp_relay_add relay
665 [ $ADD_LOCAL_HOSTNAME -eq 1 ] && {
666 local lanaddr lanaddr6
667 local ulaprefix="$(uci_get network @globals[0] ula_prefix)"
668 local hostname="$(uci_get system @system[0] hostname Lede)"
670 network_get_ipaddr lanaddr "lan" && {
671 dhcp_domain_add "" "$hostname" "$lanaddr"
674 [ -n "$ulaprefix" ] && network_get_ipaddrs6 lanaddr6 "lan" && {
675 for lanaddr6 in $lanaddr6; do
677 "${ulaprefix%%:/*}"*)
678 dhcp_domain_add "" "$hostname" "$lanaddr6"
686 config_foreach dhcp_srv_add srvhost
687 config_foreach dhcp_mx_add mxhost
690 config_get odhcpd_is_active odhcpd maindhcp
691 if [ "$odhcpd_is_active" != "1" ]; then
692 config_foreach dhcp_add dhcp
696 config_foreach dhcp_cname_add cname
699 rm -f /tmp/resolv.conf
700 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
701 echo "search $DOMAIN" >> /tmp/resolv.conf
703 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
704 for DNS_SERVER in $DNS_SERVERS ; do
705 echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
709 procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq.pid
710 procd_set_param file $CONFIGFILE
711 procd_set_param respawn
713 procd_add_jail dnsmasq ubus log
714 procd_add_jail_mount $CONFIGFILE $TRUSTANCHORSFILE $HOSTFILE /etc/passwd /etc/group /etc/TZ /dev/null /dev/urandom /etc/dnsmasq.conf /tmp/dnsmasq.d /tmp/resolv.conf.auto /etc/hosts /etc/ethers $EXTRA_MOUNT
715 procd_add_jail_mount_rw /var/run/dnsmasq/ /tmp/dhcp.leases
721 rc_procd start_service "$@"
726 [ -f /tmp/resolv.conf ] && {
727 rm -f /tmp/resolv.conf
728 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
730 rm -f /var/run/dnsmasq.*.dhcp