#!/bin/sh /etc/rc.common # Copyright (C) 2007 OpenWrt.org START=60 DNS_SERVERS="" DOMAIN="" 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 [ $_loctmp -gt 0 ] && append args "$value" } append_parm() { local section="$1" local option="$2" local switch="$3" local _loctmp config_get _loctmp "$section" "$option" [ -z "$_loctmp" ] && return 0 append args "$switch $_loctmp" } append_server() { append args "-S $1" } append_interface() { local ifname=$(uci_get_state network "$1" ifname "$1") append args "-i $ifname" } append_notinterface() { local ifname=$(uci_get_state network "$1" ifname "$1") append args "-I $ifname" } append_addnhosts() { append args "-H $1" } append_bogusnxdomain() { append args "-B $1" } dnsmasq() { local cfg="$1" append_bool "$cfg" authoritative "-K" append_bool "$cfg" nodaemon "-d" append_bool "$cfg" domainneeded "-D" append_bool "$cfg" filterwin2k "-f" append_bool "$cfg" nohosts "-h" append_bool "$cfg" nonegcache "-N" append_bool "$cfg" strictorder "-o" append_bool "$cfg" logqueries "-q" append_bool "$cfg" noresolv "-R" append_bool "$cfg" localise_queries "-y" append_bool "$cfg" readethers "-Z" append_bool "$cfg" dbus "-1" append_bool "$cfg" boguspriv "-b" append_bool "$cfg" expandhosts "-E" append_bool "$cfg" enable_tftp "--enable-tftp" append_bool "$cfg" nonwildcard "-z" append_parm "$cfg" cachesize "-c" append_parm "$cfg" dnsforwardmax "-0" append_parm "$cfg" port "-p" append_parm "$cfg" ednspacket_max "-P" append_parm "$cfg" dhcpleasemax "-X" append_parm "$cfg" "queryport" "-Q" append_parm "$cfg" "domain" "-s" append_parm "$cfg" "local" "-S" config_list_foreach "$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 "$cfg" "leasefile" "-l" append_parm "$cfg" "resolvfile" "-r" append_parm "$cfg" "tftp_root" "--tftp-root" append_parm "$cfg" "dhcp_boot" "--dhcp-boot" config_get DOMAIN "$cfg" domain config_get_bool readethers "$cfg" readethers [ "$readethers" = "1" ] && [ -e "/etc/ethers" ] || touch /etc/ethers config_get leasefile $cfg leasefile [ -n "$leasefile" ] && [ -e "$leasefile" ] || touch "$leasefile" config_get_bool cachelocal "$cfg" cachelocal 1 config_get hostsfile "$cfg" dhcphostsfile [ -e "$hostsfile" ] && append args "--dhcp-hostsfile=$hostsfile" local rebind config_get_bool rebind "$cfg" rebind_protection 1 [ $rebind -gt 0 ] && { logger -t dnsmasq \ "DNS rebinding protection is active," \ "will discard upstream RFC1918 responses!" append args "--stop-dns-rebind" local rebind_localhost config_get_bool rebind_localhost "$cfg" rebind_localhost 0 [ $rebind_localhost -gt 0 ] && { logger -t dnsmasq "Allowing 127.0.0.0/8 responses" append args "--rebind-localhost-ok" } append_rebind_domain() { logger -t dnsmasq "Allowing RFC1918 responses for domain $1" append args "--rebind-domain-ok=$1" } config_list_foreach "$cfg" rebind_domain append_rebind_domain } } dhcp_subscrid_add() { local cfg="$1" config_get networkid "$cfg" networkid [ -n "$networkid" ] || return 0 config_get subscriberid "$cfg" subscriberid [ -n "$subscriberid" ] || return 0 append args "--dhcp-subscrid=$networkid,$subscriberid" dhcp_option_add "$cfg" "$networkid" } dhcp_remoteid_add() { local cfg="$1" config_get networkid "$cfg" networkid [ -n "$networkid" ] || return 0 config_get remoteid "$cfg" remoteid [ -n "$remoteid" ] || return 0 append args "--dhcp-remoteid=$networkid,$remoteid" dhcp_option_add "$cfg" "$networkid" } dhcp_circuitid_add() { local cfg="$1" config_get networkid "$cfg" networkid [ -n "$networkid" ] || return 0 config_get circuitid "$cfg" circuitid [ -n "$circuitid" ] || return 0 append args "--dhcp-circuitid=$networkid,$circuitid" dhcp_option_add "$cfg" "$networkid" } dhcp_userclass_add() { local cfg="$1" config_get networkid "$cfg" networkid [ -n "$networkid" ] || return 0 config_get userclass "$cfg" userclass [ -n "$userclass" ] || return 0 append args "--dhcp-userclass=$networkid,$userclass" dhcp_option_add "$cfg" "$networkid" } dhcp_vendorclass_add() { local cfg="$1" config_get networkid "$cfg" networkid [ -n "$networkid" ] || return 0 config_get vendorclass "$cfg" vendorclass [ -n "$vendorclass" ] || return 0 append args "--dhcp-vendorclass=$networkid,$vendorclass" dhcp_option_add "$cfg" "$networkid" } dhcp_host_add() { local cfg="$1" config_get name "$cfg" name config_get networkid "$cfg" networkid [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" config_get ip "$cfg" ip [ -n "$ip" ] || return 0 macs="" config_get mac "$cfg" mac for m in $mac; do append macs "$m" ","; done [ -n "$macs" ] || return 0 append args "--dhcp-host=$macs,${networkid:+net:$networkid,}$ip${name:+,$name}" } dhcp_mac_add() { local cfg="$1" config_get networkid "$cfg" networkid [ -n "$networkid" ] || return 0 config_get mac "$cfg" mac [ -n "$mac" ] || return 0 append args "--dhcp-mac=$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 append args "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress" dhcp_option_add "$cfg" "$networkid" } 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 "-2 $ifname" && return 0 config_get proto "$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="${limit:-150}" eval "$(ipcalc.sh $ipaddr $netmask $start $limit)" if [ "$dynamicdhcp" = "0" ]; then END="static"; fi append args "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}" dhcp_option_add "$cfg" "$networkid" } dhcp_option_add() { local cfg="$1" local networkid="$2" config_get dhcp_option "$cfg" dhcp_option for o in $dhcp_option; do append args "-O $networkid","$o" done } dhcp_domain_add() { local cfg="$1" local ip name names config_get names "$cfg" name [ -n "$names" ] || return 0 config_get ip "$cfg" ip [ -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:+.$DOMAIN}" append args "-A /$fqdn/$ip" [ -n "$raddr" ] && { append args "--ptr-record=$raddr,$fqdn" raddr="" } done } start() { include /lib/network scan_interfaces config_load dhcp args="" config_foreach dnsmasq dnsmasq config_foreach dhcp_host_add host config_foreach dhcp_boot_add boot config_foreach dhcp_mac_add mac 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 config_foreach dhcp_add dhcp /usr/sbin/dnsmasq $args && { rm -f /tmp/resolv.conf [ -n "$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() { [ -f /tmp/resolv.conf ] && { rm -f /tmp/resolv.conf ln -s /tmp/resolv.conf.auto /tmp/resolv.conf } killall dnsmasq return 0 }