dnsmasq: allow using dnsmasq as the sole resolver
[openwrt/openwrt.git] / package / network / services / dnsmasq / files / dnsmasq.init
index 19517d937d451c9cbe889ef0ad3ba3024b342db7..b119981cb806bf4fdac4727228e631400125678b 100644 (file)
@@ -13,10 +13,10 @@ ADD_LOCAL_FQDN=""
 
 BASECONFIGFILE="/var/etc/dnsmasq.conf"
 BASEHOSTFILE="/tmp/hosts/dhcp"
-BASETIMESTAMPFILE="/etc/dnsmasq.time"
 TRUSTANCHORSFILE="/usr/share/dnsmasq/trust-anchors.conf"
 TIMEVALIDFILE="/var/state/dnsmasqsec"
 BASEDHCPSTAMPFILE="/var/run/dnsmasq"
+DHCPBOGUSHOSTNAMEFILE="/usr/share/dnsmasq/dhcpbogushostname.conf"
 RFC6761FILE="/usr/share/dnsmasq/rfc6761.conf"
 DHCPSCRIPT="/usr/lib/dnsmasq/dhcp-script.sh"
 
@@ -138,12 +138,16 @@ append_ipset() {
 }
 
 append_interface() {
-       network_get_device ifname "$1" || return
+       network_get_device ifname "$1" || ifname="$1"
        xappend "--interface=$ifname"
 }
 
+append_listenaddress() {
+       xappend "--listen-address=$1"
+}
+
 append_notinterface() {
-       network_get_device ifname "$1" || return
+       network_get_device ifname "$1" || ifname="$1"
        xappend "--except-interface=$ifname"
 }
 
@@ -273,7 +277,7 @@ dhcp_match_add() {
 
 dhcp_host_add() {
        local cfg="$1"
-       local hosttag nametime addrs duids
+       local hosttag nametime addrs duids macs tags
 
        config_get_bool force "$cfg" force 0
 
@@ -291,7 +295,7 @@ dhcp_host_add() {
 
        config_get_bool dns "$cfg" dns 0
        [ "$dns" = "1" -a -n "$ip" -a -n "$name" ] && {
-               echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE
+               echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE_TMP
        }
 
        config_get mac "$cfg" mac
@@ -301,7 +305,6 @@ dhcp_host_add() {
        if [ -n "$mac" ]; then
                # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
                # many MAC are possible to track a laptop ON/OFF dock
-               macs=""
                for m in $mac; do append macs "$m" ","; done
        fi
 
@@ -319,7 +322,11 @@ dhcp_host_add() {
        fi
 
        if [ -n "$hostid" ]; then
-                       hex_to_hostid hostid "$hostid"
+               hex_to_hostid hostid "$hostid"
+       fi
+
+       if [ -n "$tag" ]; then
+               for t in $tag; do append tags "$t" ",set:"; done
        fi
 
        config_get_bool broadcast "$cfg" broadcast 0
@@ -327,7 +334,7 @@ dhcp_host_add() {
 
        [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 
-       hosttag="${networkid:+,set:${networkid}}${tag:+,set:${tag}}$broadcast"
+       hosttag="${networkid:+,set:${networkid}}${tags:+,set:${tags}}$broadcast"
        nametime="${name:+,$name}${leasetime:+,$leasetime}"
 
        if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
@@ -378,8 +385,8 @@ dhcp_this_host_add() {
                                for lanaddr6 in $lanaddrs6 ; do
                                        case "$lanaddr6" in
                                        "${ulaprefix%%:/*}"*)
-                                                       dhcp_domain_add "" "$routername" "$lanaddr6"
-                                                       ;;
+                                               dhcp_domain_add "" "$routername" "$lanaddr6"
+                                               ;;
                                        esac
                                done
                        fi
@@ -452,9 +459,7 @@ dhcp_add() {
        config_get networkid "$cfg" networkid
        [ -n "$networkid" ] || networkid="$net"
 
-       network_get_subnet subnet "$net" || return 0
        network_get_device ifname "$net" || return 0
-       network_get_protocol proto "$net" || return 0
 
        [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
                DNS_SERVERS="$DNS_SERVERS $dnsserver"
@@ -466,6 +471,9 @@ dhcp_add() {
                return 0
        }
 
+       network_get_subnet subnet "$net" || return 0
+       network_get_protocol proto "$net" || return 0
+
        # Do not support non-static interfaces for now
        [ static = "$proto" ] || return 0
 
@@ -575,7 +583,8 @@ dhcp_add() {
                dhcp_option_append "option6:dns-server,$dnss" "$networkid"
        fi
 
-       dhcp_option_add "$cfg" "$networkid"
+       dhcp_option_add "$cfg" "$networkid" 0
+       dhcp_option_add "$cfg" "$networkid" 2
 }
 
 dhcp_option_append() {
@@ -591,18 +600,20 @@ dhcp_option_add() {
        local cfg="$1"
        local networkid="$2"
        local force="$3"
+       local opt="dhcp_option"
 
        [ "$force" = "0" ] && force=
+       [ "$force" = "2" ] && opt="dhcp_option_force"
 
        local list_len
-       config_get list_len "$cfg" dhcp_option_LENGTH
+       config_get list_len "$cfg" "${opt}_LENGTH"
 
        if [ -n "$list_len" ]; then
-               config_list_foreach "$cfg" dhcp_option dhcp_option_append "$networkid" "$force"
+               config_list_foreach "$cfg" "$opt" dhcp_option_append "$networkid" "$force"
        else
-               config_get dhcp_option "$cfg" dhcp_option
+               config_get dhcp_option "$cfg" "$opt"
 
-               [ -n "$dhcp_option" ] && echo "Warning: the 'option dhcp_option' syntax is deprecated, use 'list dhcp_option'" >&2
+               [ -n "$dhcp_option" ] && echo "Warning: the 'option $opt' syntax is deprecated, use 'list $opt'" >&2
 
                local option
                for option in $dhcp_option; do
@@ -625,7 +636,7 @@ dhcp_domain_add() {
                record="${record:+$record }$name"
        done
 
-       echo "$ip $record" >> $HOSTFILE
+       echo "$ip $record" >> $HOSTFILE_TMP
 }
 
 dhcp_srv_add() {
@@ -720,7 +731,9 @@ dhcp_relay_add() {
 
 dnsmasq_start()
 {
-       local cfg="$1" disabled resolvfile user_dhcpscript
+       local cfg="$1"
+       local disabled user_dhcpscript
+       local resolvfile localuse
 
        config_get_bool disabled "$cfg" disabled 0
        [ "$disabled" -gt 0 ] && return 0
@@ -731,7 +744,7 @@ dnsmasq_start()
        CONFIGFILE="${BASECONFIGFILE}.${cfg}"
        CONFIGFILE_TMP="${CONFIGFILE}.$$"
        HOSTFILE="${BASEHOSTFILE}.${cfg}"
-       TIMESTAMPFILE="${BASETIMESTAMPFILE}.${cfg}"
+       HOSTFILE_TMP="${HOSTFILE}.$$"
        BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
 
        # before we can call xappend
@@ -741,14 +754,17 @@ dnsmasq_start()
        mkdir -p /var/lib/misc
        chown dnsmasq:dnsmasq /var/run/dnsmasq
 
-       [ -f "$TIMESTAMPFILE" ] && rm -f "$TIMESTAMPFILE"
-
        echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
-       echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE
+       echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE_TMP
+
+       local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
+       if [ ! -r "$dnsmasqconffile" ]; then
+               dnsmasqconffile=/etc/dnsmasq.conf
+       fi
 
        # if we did this last, we could override auto-generated config
-       [ -f /etc/dnsmasq.conf ] && {
-               xappend "--conf-file=/etc/dnsmasq.conf"
+       [ -f "${dnsmasqconffile}" ] && {
+               xappend "--conf-file=${dnsmasqconffile}"
        }
 
        $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
@@ -800,6 +816,7 @@ dnsmasq_start()
        append_bool "$cfg" localise_queries "--localise-queries"
        append_bool "$cfg" readethers "--read-ethers"
        append_bool "$cfg" dbus "--enable-dbus"
+       append_bool "$cfg" ubus "--enable-ubus" 1
        append_bool "$cfg" expandhosts "--expand-hosts"
        config_get tftp_root "$cfg" "tftp_root"
        [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
@@ -826,12 +843,15 @@ dnsmasq_start()
        append_parm "$cfg" "maxport" "--max-port"
        append_parm "$cfg" "domain" "--domain"
        append_parm "$cfg" "local" "--server"
+       config_list_foreach "$cfg" "listen_address" append_listenaddress
        config_list_foreach "$cfg" "server" append_server
        config_list_foreach "$cfg" "rev_server" append_rev_server
        config_list_foreach "$cfg" "address" append_address
        config_list_foreach "$cfg" "ipset" append_ipset
-       config_list_foreach "$cfg" "interface" append_interface
-       config_list_foreach "$cfg" "notinterface" append_notinterface
+       [ -n "$BOOT" ] || {
+               config_list_foreach "$cfg" "interface" append_interface
+               config_list_foreach "$cfg" "notinterface" append_notinterface
+       }
        config_list_foreach "$cfg" "addnhosts" append_addnhosts
        config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
        append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
@@ -853,9 +873,6 @@ dnsmasq_start()
                ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
        fi
 
-       config_get_bool readethers "$cfg" readethers
-       [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
-
        config_get user_dhcpscript $cfg dhcpscript
        if has_handler || [ -n "$user_dhcpscript" ]; then
                xappend "--dhcp-script=$DHCPSCRIPT"
@@ -866,14 +883,14 @@ dnsmasq_start()
        config_get_bool cachelocal "$cfg" cachelocal 1
 
        config_get_bool noresolv "$cfg" noresolv 0
+       config_get_bool localuse "$cfg" localuse 0
        if [ "$noresolv" != "1" ]; then
-               config_get resolvfile "$cfg" resolvfile "/tmp/resolv.conf.auto"
-               # So jail doesn't complain if file missing
-               [ -n "$resolvfile" -a \! -e "$resolvfile" ] && touch "$resolvfile"
+               config_get resolvfile "$cfg" resolvfile /tmp/resolv.conf.auto
+               [ -n "$resolvfile" -a ! -e "$resolvfile" ] && touch "$resolvfile"
+               xappend "--resolv-file=$resolvfile"
+               [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && localuse=1
        fi
 
-       [ -n "$resolvfile" ] && xappend "--resolv-file=$resolvfile"
-
        config_get hostsfile "$cfg" dhcphostsfile
        [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 
@@ -920,14 +937,16 @@ dnsmasq_start()
        }
 
        dhcp_option_add "$cfg" "" 0
+       dhcp_option_add "$cfg" "" 2
 
        xappend "--dhcp-broadcast=tag:needs-broadcast"
 
        xappend "--addn-hosts=$(dirname $HOSTFILE)"
 
        config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
-       [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
        xappend "--conf-dir=$dnsmasqconfdir"
+       dnsmasqconfdir="${dnsmasqconfdir%%,*}"
+       [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
        xappend "--user=dnsmasq"
        xappend "--group=dnsmasq"
        echo >> $CONFIGFILE_TMP
@@ -940,6 +959,13 @@ dnsmasq_start()
 
        config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
        echo >> $CONFIGFILE_TMP
+
+       config_get_bool dhcpbogushostname "$cfg" dhcpbogushostname 1
+       [ "$dhcpbogushostname" -gt 0 ] && {
+               xappend "--dhcp-ignore-names=tag:dhcp_bogus_hostname"
+               [ -r "$DHCPBOGUSHOSTNAMEFILE" ] && xappend "--conf-file=$DHCPBOGUSHOSTNAMEFILE"
+       }
+
        config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
        config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
        config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
@@ -951,7 +977,7 @@ dnsmasq_start()
        config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
        config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
        config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
-       config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
+       [ -n "$BOOT" ] || config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
 
        echo >> $CONFIGFILE_TMP
        config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
@@ -968,13 +994,13 @@ dnsmasq_start()
                # Enable RA feature for when/if it is constructed,
                # and RA is selected per interface pool (RA, DHCP, or both),
                # but no one (should) want RA broadcast in syslog
-               config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
+               [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
                xappend "--enable-ra"
                xappend "--quiet-ra"
                append_bool "$cfg" quietdhcp "--quiet-dhcp6"
 
        elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
-               config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
+               [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
        fi
 
 
@@ -984,8 +1010,9 @@ dnsmasq_start()
 
        echo >> $CONFIGFILE_TMP
        mv -f $CONFIGFILE_TMP $CONFIGFILE
+       mv -f $HOSTFILE_TMP $HOSTFILE
 
-       [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
+       [ "$localuse" -gt 0 ] && {
                rm -f /tmp/resolv.conf
                [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
                        echo "search $DOMAIN" >> /tmp/resolv.conf
@@ -1002,13 +1029,8 @@ dnsmasq_start()
        [ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
        procd_set_param respawn
 
-       local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
-       if [ ! -r "$dnsmasqconffile" ]; then
-               dnsmasqconffile=/etc/dnsmasq.conf
-       fi
-
        procd_add_jail dnsmasq ubus log
-       procd_add_jail_mount $CONFIGFILE $TRUSTANCHORSFILE $HOSTFILE $RFC6761FILE /etc/passwd /etc/group /etc/TZ /dev/null /dev/urandom $dnsmasqconffile $dnsmasqconfdir $resolvfile $user_dhcpscript /etc/hosts /etc/ethers /sbin/hotplug-call $EXTRA_MOUNT $DHCPSCRIPT
+       procd_add_jail_mount $CONFIGFILE $TRUSTANCHORSFILE $HOSTFILE $RFC6761FILE $DHCPBOGUSHOSTNAMEFILE /etc/passwd /etc/group /etc/TZ /dev/null /dev/urandom $dnsmasqconffile $dnsmasqconfdir $resolvfile $user_dhcpscript /etc/hosts /etc/ethers /sbin/hotplug-call $EXTRA_MOUNT $DHCPSCRIPT
        procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
 
        procd_close_instance
@@ -1017,24 +1039,35 @@ dnsmasq_start()
 dnsmasq_stop()
 {
        local cfg="$1"
+       local noresolv resolvfile localuse
 
+       config_get_bool noresolv "$cfg" noresolv 0
+       config_get_bool localuse "$cfg" localuse 0
        config_get resolvfile "$cfg" "resolvfile"
 
-       #relink /tmp/resolve.conf only for main instance
-       [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
-               [ -f /tmp/resolv.conf ] && {
-                       rm -f /tmp/resolv.conf
-                       ln -s "$resolvfile" /tmp/resolv.conf
-               }
-       }
+       [ "$noresolv" = 0 -a "$resolvfile" = "/tmp/resolv.conf.auto" ] && localuse=1
+       [ "$localuse" -gt 0 ] && ln -sf "/tmp/resolv.conf.auto" /tmp/resolv.conf
 
        rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
 }
 
+add_interface_trigger()
+{
+       local interface ignore
+
+       config_get interface "$1" interface
+       config_get_bool ignore "$1" ignore 0
+
+       [ -n "$interface" -a $ignore -eq 0 ] && procd_add_interface_trigger "interface.*" "$interface" /etc/init.d/dnsmasq reload
+}
+
 service_triggers()
 {
-       procd_add_reload_trigger "dhcp"
-       procd_add_raw_trigger "interface.*" 2000 /etc/init.d/dnsmasq reload
+       procd_add_reload_trigger "dhcp" "system"
+
+       config_load dhcp
+       config_foreach add_interface_trigger dhcp
+       config_foreach add_interface_trigger relay
 }
 
 boot()
@@ -1047,8 +1080,6 @@ start_service() {
        local instance="$1"
        local instance_found=0
 
-       [ -n "$BOOT" ] && return
-
        . /lib/functions/network.sh
 
        config_cb() {
@@ -1073,7 +1104,7 @@ start_service() {
 
 reload_service() {
        rc_procd start_service "$@"
-       return 0
+       procd_send_signal dnsmasq "$@"
 }
 
 stop_service() {