#!/bin/sh /etc/rc.common # Copyright (C) 2007-2012 OpenWrt.org START=60 SERVICE_USE_PID=1 DNS_SERVERS="" DOMAIN="" ADD_LOCAL_DOMAIN=1 ADD_LOCAL_HOSTNAME=1 CONFIGFILE="/var/etc/dnsmasq.conf" xappend() { local value="$1" echo "${value#--}" >> $CONFIGFILE } 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" 0 [ $_loctmp -gt 0 ] && xappend "$value" } append_parm() { local section="$1" local option="$2" local switch="$3" local _loctmp config_get _loctmp "$section" "$option" [ -z "$_loctmp" ] && return 0 xappend "$switch=$_loctmp" } append_server() { xappend "--server=$1" } append_interface() { local ifname=$(uci_get_state network "$1" ifname "$1") xappend "--interface=$ifname" } append_notinterface() { local ifname=$(uci_get_state network "$1" ifname "$1") xappend "--except-interface=$ifname" } append_addnhosts() { xappend "--addn-hosts=$1" } append_bogusnxdomain() { xappend "--bogus-nxdomain=$1" } dnsmasq() { local cfg="$1" append_bool "$cfg" authoritative "--dhcp-authoritative" append_bool "$cfg" nodaemon "--no-daemon" append_bool "$cfg" domainneeded "--domain-needed" append_bool "$cfg" filterwin2k "--filterwin2k" append_bool "$cfg" nohosts "--no-hosts" append_bool "$cfg" nonegcache "--no-negcache" append_bool "$cfg" strictorder "--strict-order" append_bool "$cfg" logqueries "--log-queries" append_bool "$cfg" noresolv "--no-resolv" append_bool "$cfg" localise_queries "--localise-queries" append_bool "$cfg" readethers "--read-ethers" append_bool "$cfg" dbus "--enable-dbus" append_bool "$cfg" boguspriv "--bogus-priv" append_bool "$cfg" expandhosts "--expand-hosts" append_bool "$cfg" enable_tftp "--enable-tftp" append_bool "$cfg" nonwildcard "--bind-interfaces" append_bool "$cfg" fqdn "--dhcp-fqdn" append_parm "$cfg" dhcpscript "--dhcp-script" append_parm "$cfg" cachesize "--cache-size" append_parm "$cfg" dnsforwardmax "--dns-forward-max" append_parm "$cfg" port "--port" append_parm "$cfg" ednspacket_max "--edns-packet-max" append_parm "$cfg" dhcpleasemax "--dhcp-lease-max" append_parm "$cfg" "queryport" "--query-port" append_parm "$cfg" "domain" "--domain" append_parm "$cfg" "local" "--server" config_list_foreach "$cfg" "server" append_server config_list_foreach "$cfg" "interface" append_interface config_list_foreach "$cfg" "notinterface" append_notinterface config_list_foreach "$cfg" "addnhosts" append_addnhosts config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain append_parm "$cfg" "leasefile" "--dhcp-leasefile" append_parm "$cfg" "resolvfile" "--resolv-file" append_parm "$cfg" "tftp_root" "--tftp-root" append_parm "$cfg" "dhcp_boot" "--dhcp-boot" append_parm "$cfg" "local_ttl" "--local-ttl" config_get DOMAIN "$cfg" domain config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1 config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1 config_get_bool readethers "$cfg" readethers [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers config_get leasefile $cfg leasefile [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile" config_get_bool cachelocal "$cfg" cachelocal 1 config_get hostsfile "$cfg" dhcphostsfile [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile" local rebind config_get_bool rebind "$cfg" rebind_protection 1 [ $rebind -gt 0 ] && { logger -t dnsmasq \ "DNS rebinding protection is active," \ "will discard upstream RFC1918 responses!" xappend "--stop-dns-rebind" local rebind_localhost config_get_bool rebind_localhost "$cfg" rebind_localhost 0 [ $rebind_localhost -gt 0 ] && { logger -t dnsmasq "Allowing 127.0.0.0/8 responses" xappend "--rebind-localhost-ok" } append_rebind_domain() { logger -t dnsmasq "Allowing RFC1918 responses for domain $1" xappend "--rebind-domain-ok=$1" } config_list_foreach "$cfg" rebind_domain append_rebind_domain } dhcp_option_add "$cfg" "" 0 echo >> $CONFIGFILE } dhcp_subscrid_add() { local cfg="$1" config_get networkid "$cfg" networkid [ -n "$networkid" ] || return 0 config_get subscriberid "$cfg" subscriberid [ -n "$subscriberid" ] || return 0 xappend "--dhcp-subscrid=$networkid,$subscriberid" config_get_bool force "$cfg" force 0 dhcp_option_add "$cfg" "$networkid" "$force" } dhcp_remoteid_add() { local cfg="$1" config_get networkid "$cfg" networkid [ -n "$networkid" ] || return 0 config_get remoteid "$cfg" remoteid [ -n "$remoteid" ] || return 0 xappend "--dhcp-remoteid=$networkid,$remoteid" config_get_bool force "$cfg" force 0 dhcp_option_add "$cfg" "$networkid" "$force" } dhcp_circuitid_add() { local cfg="$1" config_get networkid "$cfg" networkid [ -n "$networkid" ] || return 0 config_get circuitid "$cfg" circuitid [ -n "$circuitid" ] || return 0 xappend "--dhcp-circuitid=$networkid,$circuitid" config_get_bool force "$cfg" force 0 dhcp_option_add "$cfg" "$networkid" "$force" } dhcp_userclass_add() { local cfg="$1" config_get networkid "$cfg" networkid [ -n "$networkid" ] || return 0 config_get userclass "$cfg" userclass [ -n "$userclass" ] || return 0 xappend "--dhcp-userclass=$networkid,$userclass" config_get_bool force "$cfg" force 0 dhcp_option_add "$cfg" "$networkid" "$force" } dhcp_vendorclass_add() { local cfg="$1" config_get networkid "$cfg" networkid [ -n "$networkid" ] || return 0 config_get vendorclass "$cfg" vendorclass [ -n "$vendorclass" ] || return 0 xappend "--dhcp-vendorclass=$networkid,$vendorclass" config_get_bool force "$cfg" force 0 dhcp_option_add "$cfg" "$networkid" "$force" } dhcp_host_add() { local cfg="$1" config_get_bool force "$cfg" force 0 config_get networkid "$cfg" networkid [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force" config_get name "$cfg" name config_get ip "$cfg" ip [ -n "$ip" -o -n "$name" ] || return 0 macs="" config_get mac "$cfg" mac for m in $mac; do append macs "$m" ","; done [ -n "$macs" ] || return 0 config_get tag "$cfg" tag xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${tag:+,set:$tag}${ip:+,$ip}${name:+,$name}" } dhcp_tag_add() { local cfg="$1" tag="$cfg" [ -n "$tag" ] || return 0 config_get_bool force "$cfg" force 0 [ "$force" = "0" ] && force= config_get option "$cfg" dhcp_option for o in $option; do xappend "--dhcp-option${force:+-force}=tag:$tag,$o" done } dhcp_mac_add() { local cfg="$1" config_get networkid "$cfg" networkid [ -n "$networkid" ] || return 0 config_get mac "$cfg" mac [ -n "$mac" ] || return 0 xappend "--dhcp-mac=$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 xappend "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress" config_get_bool force "$cfg" force 0 dhcp_option_add "$cfg" "$networkid" "$force" } 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 "--no-dhcp-interface=$ifname" && return 0 config_get proto "$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 $ifname >&- && { logger -t dnsmasq \ "found already running DHCP-server on interface '$ifname'" \ "refusing to start, use 'option force 1' to override" 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="${limit:-150}" [ "$limit" -gt 0 ] && limit=$((limit-1)) eval "$(ipcalc.sh $ipaddr $netmask $start $limit)" if [ "$dynamicdhcp" = "0" ]; then END="static"; fi xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}" dhcp_option_add "$cfg" "$networkid" } dhcp_option_add() { local cfg="$1" local networkid="$2" local force="$3" [ "$force" = "0" ] && force= config_get dhcp_option "$cfg" dhcp_option for o in $dhcp_option; do xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o" done } dhcp_domain_add() { local cfg="$1" local ip name names config_get names "$cfg" name "$2" [ -n "$names" ] || return 0 config_get ip "$cfg" ip "$3" [ -n "$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:+.$DOMAIN}" xappend "--address=/$fqdn/$ip" [ -n "$raddr" ] && { xappend "--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 [ -n "$port" ] || return 0 config_get class "$cfg" class config_get weight "$cfg" weight local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}" xappend "--srv-host=$service" } dhcp_mx_add() { local cfg="$1" local domain relay pref config_get domain "$cfg" domain [ -n "$domain" ] || return 0 config_get relay "$cfg" relay [ -n "$relay" ] || return 0 config_get pref "$cfg" pref 0 local service="$domain,$relay,$pref" xappend "--mx-host=$service" } dhcp_cname_add() { local cfg="$1" local cname target config_get cname "$cfg" cname [ -n "$cname" ] || return 0 config_get target "$cfg" target [ -n "$target" ] || return 0 xappend "--cname=${cname},${target}" } start() { include /lib/network scan_interfaces local lanaddr config_get lanaddr "lan" ipaddr config_load dhcp # before we can call xappend mkdir -p $(dirname $CONFIGFILE) echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE # if we did this last, we could override auto-generated config [ -f /etc/dnsmasq.conf ] && { xappend "--conf-file=/etc/dnsmasq.conf" } args="" config_foreach dnsmasq dnsmasq config_foreach dhcp_host_add host echo >> $CONFIGFILE config_foreach dhcp_boot_add boot config_foreach dhcp_mac_add mac config_foreach dhcp_tag_add tag 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 echo >> $CONFIGFILE config_foreach dhcp_srv_add srvhost config_foreach dhcp_mx_add mxhost echo >> $CONFIGFILE config_foreach dhcp_add dhcp echo >> $CONFIGFILE config_foreach dhcp_cname_add cname echo >> $CONFIGFILE # add own hostname [ $ADD_LOCAL_HOSTNAME -eq 1 ] && [ -n "$lanaddr" ] && { local hostname="$(uci_get system.@system[0].hostname)" dhcp_domain_add "" "${hostname:-OpenWrt}" "$lanaddr" } service_start /usr/sbin/dnsmasq -C $CONFIGFILE && { rm -f /tmp/resolv.conf [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$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() { service_stop /usr/sbin/dnsmasq && { [ -f /tmp/resolv.conf ] && { rm -f /tmp/resolv.conf ln -s /tmp/resolv.conf.auto /tmp/resolv.conf } } }