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e7807dd8ca
Sometimes it's useful to compare the generated config file from UCI config with a hand-edited dnsmasq config file, especially if you're migrating to an OpenWRT router from something else (such as Astlinux). Putting the generated config makes it easier to capture and diff, etc. Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com> SVN-Revision: 31182
477 lines
11 KiB
Bash
477 lines
11 KiB
Bash
#!/bin/sh /etc/rc.common
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# Copyright (C) 2007 OpenWrt.org
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START=60
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SERVICE_USE_PID=1
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DNS_SERVERS=""
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DOMAIN=""
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CONFIGFILE="/var/etc/dnsmasq.conf"
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xappend() {
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local value="$1"
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echo "${value#--}" >> $CONFIGFILE
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}
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dhcp_calc() {
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local ip="$1"
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local res=0
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while [ -n "$ip" ]; do
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part="${ip%%.*}"
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res="$(($res * 256))"
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res="$(($res + $part))"
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[ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
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done
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echo "$res"
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}
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append_bool() {
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local section="$1"
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local option="$2"
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local value="$3"
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local _loctmp
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config_get_bool _loctmp "$section" "$option" 0
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[ $_loctmp -gt 0 ] && xappend "$value"
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}
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append_parm() {
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local section="$1"
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local option="$2"
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local switch="$3"
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local _loctmp
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config_get _loctmp "$section" "$option"
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[ -z "$_loctmp" ] && return 0
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xappend "$switch=$_loctmp"
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}
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append_server() {
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xappend "--server=$1"
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}
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append_interface() {
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local ifname=$(uci_get_state network "$1" ifname "$1")
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xappend "--interface=$ifname"
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}
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append_notinterface() {
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local ifname=$(uci_get_state network "$1" ifname "$1")
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xappend "--except-interface=$ifname"
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}
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append_addnhosts() {
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xappend "--addn-hosts=$1"
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}
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append_bogusnxdomain() {
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xappend "--bogus-nxdomain=$1"
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}
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dnsmasq() {
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local cfg="$1"
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append_bool "$cfg" authoritative "--dhcp-authoritative"
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append_bool "$cfg" nodaemon "--no-daemon"
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append_bool "$cfg" domainneeded "--domain-needed"
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append_bool "$cfg" filterwin2k "--filterwin2k"
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append_bool "$cfg" nohosts "--no-hosts"
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append_bool "$cfg" nonegcache "--no-negcache"
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append_bool "$cfg" strictorder "--strict-order"
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append_bool "$cfg" logqueries "--log-queries"
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append_bool "$cfg" noresolv "--no-resolv"
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append_bool "$cfg" localise_queries "--localise-queries"
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append_bool "$cfg" readethers "--read-ethers"
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append_bool "$cfg" dbus "--enable-dbus"
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append_bool "$cfg" boguspriv "--bogus-priv"
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append_bool "$cfg" expandhosts "--expand-hosts"
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append_bool "$cfg" enable_tftp "--enable-tftp"
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append_bool "$cfg" nonwildcard "--bind-interfaces"
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append_parm "$cfg" dhcpscript "--dhcp-script"
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append_parm "$cfg" cachesize "--cache-size"
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append_parm "$cfg" dnsforwardmax "--dns-forward-max"
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append_parm "$cfg" port "--port"
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append_parm "$cfg" ednspacket_max "--edns-packet-max"
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append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
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append_parm "$cfg" "queryport" "--query-port"
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append_parm "$cfg" "domain" "--domain"
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append_parm "$cfg" "local" "--server"
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config_list_foreach "$cfg" "server" append_server
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config_list_foreach "$cfg" "interface" append_interface
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config_list_foreach "$cfg" "notinterface" append_notinterface
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config_list_foreach "$cfg" "addnhosts" append_addnhosts
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config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
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append_parm "$cfg" "leasefile" "--dhcp-leasefile"
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append_parm "$cfg" "resolvfile" "--resolv-file"
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append_parm "$cfg" "tftp_root" "--tftp-root"
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append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
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config_get DOMAIN "$cfg" domain
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config_get_bool readethers "$cfg" readethers
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[ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
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config_get leasefile $cfg leasefile
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[ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
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config_get_bool cachelocal "$cfg" cachelocal 1
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config_get hostsfile "$cfg" dhcphostsfile
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[ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
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local rebind
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config_get_bool rebind "$cfg" rebind_protection 1
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[ $rebind -gt 0 ] && {
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logger -t dnsmasq \
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"DNS rebinding protection is active," \
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"will discard upstream RFC1918 responses!"
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xappend "--stop-dns-rebind"
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local rebind_localhost
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config_get_bool rebind_localhost "$cfg" rebind_localhost 0
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[ $rebind_localhost -gt 0 ] && {
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logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
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xappend "--rebind-localhost-ok"
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}
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append_rebind_domain() {
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logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
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xappend "--rebind-domain-ok=$1"
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}
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config_list_foreach "$cfg" rebind_domain append_rebind_domain
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}
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echo >> $CONFIGFILE
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}
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dhcp_subscrid_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get subscriberid "$cfg" subscriberid
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[ -n "$subscriberid" ] || return 0
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xappend "--dhcp-subscrid=$networkid,$subscriberid"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_remoteid_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get remoteid "$cfg" remoteid
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[ -n "$remoteid" ] || return 0
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xappend "--dhcp-remoteid=$networkid,$remoteid"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_circuitid_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get circuitid "$cfg" circuitid
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[ -n "$circuitid" ] || return 0
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xappend "--dhcp-circuitid=$networkid,$circuitid"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_userclass_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get userclass "$cfg" userclass
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[ -n "$userclass" ] || return 0
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xappend "--dhcp-userclass=$networkid,$userclass"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_vendorclass_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get vendorclass "$cfg" vendorclass
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[ -n "$vendorclass" ] || return 0
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xappend "--dhcp-vendorclass=$networkid,$vendorclass"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_host_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid"
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config_get name "$cfg" name
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config_get ip "$cfg" ip
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[ -n "$ip" ] || [ -n "$name" ] || return 0
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macs=""
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config_get mac "$cfg" mac
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for m in $mac; do append macs "$m" ","; done
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[ -n "$macs" ] || return 0
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xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${ip:+,$ip}${name:+,$name}"
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}
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dhcp_mac_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get mac "$cfg" mac
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[ -n "$mac" ] || return 0
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xappend "--dhcp-mac=$networkid,$mac"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_boot_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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config_get filename "$cfg" filename
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[ -n "$filename" ] || return 0
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config_get servername "$cfg" servername
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[ -n "$servername" ] || return 0
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config_get serveraddress "$cfg" serveraddress
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[ -n "$serveraddress" ] || return 0
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xappend "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_add() {
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local cfg="$1"
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config_get net "$cfg" interface
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[ -n "$net" ] || return 0
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || networkid="$net"
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config_get ifname "$net" ifname
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[ -n "$ifname" ] || return 0
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config_get dnsserver "$net" dns
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[ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
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DNS_SERVERS="$DNS_SERVERS $dnsserver"
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}
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append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0
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config_get proto "$net" proto
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[ static = "$proto" ] || return 0
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config_get ipaddr "$net" ipaddr
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config_get netmask "$cfg" netmask
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[ -n "$netmask" ] || config_get netmask "$net" netmask
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#check for an already active dhcp server on the interface, unless 'force' is set
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config_get_bool force "$cfg" force 0
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[ $force -gt 0 ] || {
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udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && {
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logger -t dnsmasq \
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"found already running DHCP-server on interface '$ifname'" \
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"refusing to start, use 'option force 1' to override"
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return 0
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}
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}
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config_get start "$cfg" start
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config_get limit "$cfg" limit
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config_get leasetime "$cfg" leasetime
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config_get options "$cfg" options
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config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
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leasetime="${leasetime:-12h}"
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start="$(dhcp_calc "${start:-100}")"
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limit="${limit:-150}"
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[ "$limit" -gt 0 ] && limit=$((limit-1))
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eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
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if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
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xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_option_add() {
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local cfg="$1"
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local networkid="$2"
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config_get dhcp_option "$cfg" dhcp_option
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for o in $dhcp_option; do
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xappend "--dhcp-option=$networkid","$o"
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done
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}
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dhcp_domain_add() {
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local cfg="$1"
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local ip name names
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config_get names "$cfg" name "$2"
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[ -n "$names" ] || return 0
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config_get ip "$cfg" ip "$3"
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[ -n "$ip" ] || return 0
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local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
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local raddr="${4:+$4.$3.$2.$1.in-addr.arpa}"
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for name in $names; do
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local fqdn="$name"
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[ "${fqdn%.*}" == "$fqdn" ] && \
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fqdn="$fqdn${DOMAIN:+.$DOMAIN}"
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xappend "--address=/$fqdn/$ip"
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[ -n "$raddr" ] && {
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xappend "--ptr-record=$raddr,$fqdn"
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raddr=""
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}
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done
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}
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dhcp_srv_add() {
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local cfg="$1"
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config_get srv "$cfg" srv
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[ -n "$srv" ] || return 0
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config_get target "$cfg" target
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[ -n "$target" ] || return 0
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config_get port "$cfg" port
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[ -n "$port" ] || return 0
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config_get class "$cfg" class
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config_get weight "$cfg" weight
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local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
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xappend "--srv-host=$service"
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}
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dhcp_mx_add() {
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local cfg="$1"
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local domain relay pref
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config_get domain "$cfg" domain
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[ -n "$domain" ] || return 0
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config_get relay "$cfg" relay
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[ -n "$relay" ] || return 0
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config_get pref "$cfg" pref 0
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local service="$domain,$relay,$pref"
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append args "--mx-host=$service"
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}
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dhcp_cname_add() {
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local cfg="$1"
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local cname target
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config_get cname "$cfg" cname
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[ -n "$cname" ] || return 0
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config_get target "$cfg" target
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[ -n "$target" ] || return 0
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xappend "--cname=${cname},${target}"
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}
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start() {
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include /lib/network
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scan_interfaces
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local lanaddr
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config_get lanaddr "lan" ipaddr
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config_load dhcp
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# before we can call xappend
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mkdir -p $(dirname $CONFIGFILE)
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echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
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# if we did this last, we could override auto-generated config
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[ -f /etc/dnsmasq.conf ] && {
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xappend "--conf-file=/etc/dnsmasq.conf"
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}
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args=""
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config_foreach dnsmasq dnsmasq
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config_foreach dhcp_host_add host
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echo >> $CONFIGFILE
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config_foreach dhcp_boot_add boot
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config_foreach dhcp_mac_add mac
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config_foreach dhcp_vendorclass_add vendorclass
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config_foreach dhcp_userclass_add userclass
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config_foreach dhcp_circuitid_add circuitid
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config_foreach dhcp_remoteid_add remoteid
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config_foreach dhcp_subscrid_add subscrid
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config_foreach dhcp_domain_add domain
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echo >> $CONFIGFILE
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config_foreach dhcp_srv_add srvhost
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config_foreach dhcp_mx_add mxhost
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echo >> $CONFIGFILE
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config_foreach dhcp_add dhcp
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echo >> $CONFIGFILE
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config_foreach dhcp_cname_add cname
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echo >> $CONFIGFILE
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# add own hostname
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[ -z "$lanaddr" ] || {
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local hostname="$(uci_get system.@system[0].hostname)"
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dhcp_domain_add "" "${hostname:-OpenWrt}" "$lanaddr"
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}
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service_start /usr/sbin/dnsmasq -C $CONFIGFILE && {
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rm -f /tmp/resolv.conf
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[ -n "$DOMAIN" ] && echo "search $DOMAIN" >> /tmp/resolv.conf
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DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
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for DNS_SERVER in $DNS_SERVERS ; do
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echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
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done
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}
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}
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stop() {
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service_stop /usr/sbin/dnsmasq && {
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[ -f /tmp/resolv.conf ] && {
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rm -f /tmp/resolv.conf
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ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
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}
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}
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}
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