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#!/bin/sh /etc/rc.common
# Copyright (C) 2007 OpenWrt.org
START=60
DNS_SERVERS=""
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" "$option"
[ "$_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"
}
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 "$cfg" expandhosts "-E"
append_parm "$cfg" dnsforwardmax "-0"
append_parm "$cfg" port "-p"
append_parm "$cfg" ednspacket_max "-P"
append_parm "$cfg" dhcpleasemax "-X"
append_parm "$cfg" "addnhosts" "-H"
append_parm "$cfg" "queryport" "-Q"
append_parm "$cfg" "domain" "-s"
append_parm "$cfg" "local" "-S"
append_parm "$cfg" "leasefile" "-l"
append_parm "$cfg" "resolvfile" "-r"
config_get leasefile $cfg leasefile
[ -e "$leasefile" ] || touch "$leasefile"
config_get_bool cachelocal "$cfg" cachelocal 1
}
dhcp_subscrid_add() {
local cfg="$1"
config_get name "$cfg" name
[ -n "$name" ] || return 0
config_get subscriberid "$cfg" subscriberid
[ -n "$subscriberid" ] || return 0
append args "--dhcp-subscrid=$name,$subscriberid"
dhcp_option_add "$cfg" "$name"
}
dhcp_remoteid_add() {
local cfg="$1"
config_get name "$cfg" name
[ -n "$name" ] || return 0
config_get remoteid "$cfg" remoteid
[ -n "$remoteid" ] || return 0
append args "--dhcp-remoteid=$name,$remoteid"
dhcp_option_add "$cfg" "$name"
}
dhcp_circuitid_add() {
local cfg="$1"
config_get name "$cfg" name
[ -n "$name" ] || return 0
config_get circuitid "$cfg" circuitid
[ -n "$circuitid" ] || return 0
append args "--dhcp-circuitid=$name,$circuitid"
dhcp_option_add "$cfg" "$name"
}
dhcp_userclass_add() {
local cfg="$1"
config_get name "$cfg" name
[ -n "$name" ] || return 0
config_get userclass "$cfg" userclass
[ -n "$userclass" ] || return 0
append args "--dhcp-userclass=$name,$userclass"
dhcp_option_add "$cfg" "$name"
}
dhcp_vendorclass_add() {
local cfg="$1"
config_get name "$cfg" name
[ -n "$name" ] || return 0
config_get vendorclass "$cfg" vendorclass
[ -n "$vendorclass" ] || return 0
append args "--dhcp-vendorclass=$name,$vendorclass"
dhcp_option_add "$cfg" "$name"
}
dhcp_host_add() {
local cfg="$1"
config_get name "$cfg" name
[ -n "$name" ] || return 0
config_get mac "$cfg" mac
[ -n "$mac" ] || return 0
config_get ip "$cfg" ip
[ -n "$ip" ] || return 0
append args "--dhcp-host=$mac,$ip"
dhcp_option_add "$cfg" "$name"
}
dhcp_mac_add() {
local cfg="$1"
config_get name "$cfg" name
[ -n "$name" ] || return 0
config_get mac "$cfg" mac
[ -n "$mac" ] || return 0
append args "--dhcp-mac=$name,$mac"
dhcp_option_add "$cfg" "$name"
}
dhcp_boot_add() {
local cfg="$1"
config_get name "$cfg" name
[ -n "$name" ] || return 0
config_get filename "$cfg" filename
[ -n "$filename" ] || return 0
config_get servername "$cfg" servername
[ -n "$servername" ] || return 0
config_get serveraddress "$cfg" serveraddress
[ -n "$serveraddress" ] || return 0
append args "--dhcp-boot=net:$name,$filename,$servername,$serveraddress"
dhcp_option_add "$cfg" "$name"
}
dhcp_add() {
local cfg="$1"
config_get net "$cfg" interface
[ -n "$net" ] || return 0
config_get name "$cfg" name
[ -n "$name" ] || name="$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 $ifname"
config_get proto "$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 -R -s /bin/true -t 1 -i $ifname >&- && return 0
}
config_get start "$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 "${start:-100}")"
limit="$((${limit:-150} + 1))"
eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
append args "--dhcp-range=$name,$START,$END,$NETMASK,$leasetime${options:+ $options}"
dhcp_option_add "$cfg" "$name"
}
dhcp_option_add() {
local cfg="$1"
local name="$2"
config_get dhcp_option "$cfg" dhcp_option
for o in $dhcp_option; do
append args "-O $name","$o"
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_add dhcp
/usr/sbin/dnsmasq $args && {
rm -f /tmp/resolv.conf
DNS_SERVERS="$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
}
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