247 lines
5.1 KiB
Bash
247 lines
5.1 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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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="$3"
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local _tmp
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config_get_bool _tmp "$section" "$option"
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[ "$_tmp" -gt 0 ] && append args "$3"
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}
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dnsmasq() {
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local cfg="$1"
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append_bool "$cfg" authoritative "-K"
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append_bool "$cfg" nodaemon "-d"
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append_bool "$cfg" domainneeded "-D"
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append_bool "$cfg" filterwin2k "-f"
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append_bool "$cfg" nohosts "-h"
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append_bool "$cfg" nonegcache "-N"
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append_bool "$cfg" strictorder "-o"
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append_bool "$cfg" logqueries "-q"
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append_bool "$cfg" noresolv "-R"
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append_bool "$cfg" localise_queries "-y"
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append_bool "$cfg" readethers "-Z"
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append_bool "$cfg" dbus "-l"
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config_get dnsforwardmax "$cfg" dnsforwardmax
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dnsforwardmax="${dnsforwardmax:-150}"
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append args "-0 $dnsforwardmax"
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config_get port "$cfg" port
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port="${port:-53}"
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append args "-p $port"
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config_get ednspacket_max "$cfg" ednspacket_max
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ednspacket_max="${ednspacket_max:-1280}"
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append args "-P $ednspacket_max"
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config_get dhcpleasemax "$cfg" dhcpleasemax
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dhcpleasemax="${dhcpleasemax:-150}"
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append args "-X $dhcpleasemax"
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config_get addnhosts "$cfg" addnhosts
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config_get interface "$cfg" interface
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config_get exceptinterface "$cfg" exceptinterface
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config_get queryport "$cfg" queryport
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config_get domain "$cfg" domain
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}
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dhcp_subscrid_add() {
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local cfg="$1"
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config_get name "$cfg" name
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[ -n "$name" ] || return 0
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config_get subscriberid "$cfg" subscriberid
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[ -n "$subscriberid" ] || return 0
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append args "--dhcp-subscrid=$name,$subscriberid"
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dhcp_option_add "$cfg" "$name"
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}
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dhcp_remoteid_add() {
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local cfg="$1"
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config_get name "$cfg" name
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[ -n "$name" ] || return 0
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config_get remoteid "$cfg" remoteid
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[ -n "$remoteid" ] || return 0
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append args "--dhcp-remoteid=$name,$remoteid"
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dhcp_option_add "$cfg" "$name"
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}
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dhcp_circuitid_add() {
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local cfg="$1"
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config_get name "$cfg" name
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[ -n "$name" ] || return 0
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config_get circuitid "$cfg" circuitid
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[ -n "$circuitid" ] || return 0
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append args "--dhcp-circuitid=$name,$circuitid"
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dhcp_option_add "$cfg" "$name"
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}
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dhcp_userclass_add() {
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local cfg="$1"
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config_get name "$cfg" name
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[ -n "$name" ] || return 0
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config_get userclass "$cfg" userclass
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[ -n "$userclass" ] || return 0
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append args "--dhcp-userclass=$name,$userclass"
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dhcp_option_add "$cfg" "$name"
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}
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dhcp_vendorclass_add() {
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local cfg="$1"
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config_get name "$cfg" name
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[ -n "$name" ] || return 0
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config_get vendorclass "$cfg" vendorclass
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[ -n "$vendorclass" ] || return 0
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append args "--dhcp-vendorclass=$name,$vendorclass"
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dhcp_option_add "$cfg" "$name"
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}
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dhcp_host_add() {
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local cfg="$1"
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config_get name "$cfg" name
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[ -n "$name" ] || return 0
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config_get mac "$cfg" mac
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[ -n "$mac" ] || return 0
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append args "--dhcp-host=$mac,$ip"
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dhcp_option_add "$cfg" "$name"
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}
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dhcp_mac_add() {
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local cfg="$1"
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config_get name "$cfg" name
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[ -n "$name" ] || return 0
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config_get mac "$cfg" mac
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[ -n "$mac" ] || return 0
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append args "--dhcp-mac=$name,$mac"
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dhcp_option_add "$cfg" "$name"
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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 "$net" ] || return 0
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config_get name "$cfg" name
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[ -n "$name" ] || name="$net"
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config_get ifname "$net" ifname
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[ -n "$ifname" ] || return 0
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append_bool "$cfg" ignore "-I $ifname"
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config_get proto "$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 "$net" netmask
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#check for an already active dhcp server on the interface, unless 'force' is set
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config_get_bool force "$cfg" force 0
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[ "$force" -gt 0 ] || {
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udhcpc -n -q -R -s /bin/true -t 1 -i $ifname >&- && return 0
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}
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config_get start "$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 "$cfg" options
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leasetime="${leasetime:-12h}"
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start="$(dhcp_calc "${start:-100}")"
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limit="$((${limit:-150} + 1))"
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eval "$(ipcalc.sh $ipaddr $netmask $start $end)"
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append args "--dhcp-range=$name,$START,$END,$NETMASK,$leasetime${options:+ $options}"
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dhcp_option_add "$cfg" "$name"
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}
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dhcp_option_add () {
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local cfg="$1"
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local name="$2"
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for count in $(seq 0 100); do
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eval current_value=\$CONFIG_"$cfg"_dhcp"$count"
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if [ -z "$current_value" ]; then
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let "count-=1"
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break
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fi
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append args "-O $name","$current_value"
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done
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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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config_load dhcp
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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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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_add dhcp
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/usr/sbin/dnsmasq $args && {
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rm -f /tmp/resolv.conf
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cat > /tmp/resolv.conf <<EOF
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nameserver 127.0.0.1
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search lan
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EOF
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}
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}
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stop() {
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killall dnsmasq
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}
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