#!/bin/sh
uci -q get dhcp.isc_dhcpcd && exit 0
touch /etc/config/dhcp

[ -f /etc/bind/rndc.conf ] && key_secret=$(awk -F'"' '/secret/{print $2; exit;}' /etc/bind/rndc.conf)
[ -z "$key_secret" ] && key_secret=$(rndc-confgen | awk -F'"' '/secret/{print $2; exit;}')

uci batch <<EOF
set dhcp.isc_dhcpd=isc_dhcpd
set dhcp.isc_dhcpd.authoritative='1'
set dhcp.isc_dhcpd.default_lease_time='3600'
set dhcp.isc_dhcpd.max_lease_time='86400'
set dhcp.dynamicdns=dynamicdns
set dhcp.dynamicdns.server=127.0.0.1
set dhcp.dynamicdns.key_algo=hmac-sha256
set dhcp.dynamicdns.key_secret=$key_secret
set dhcp.dynamicdns.key_name=local-dns
commit dhcp
EOF