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#!/bin/sh
. /etc/network/functions
set -eu
dhcpd_enabled=false
address=
subnet=
gateway=
dhcpd_start_config()
{
exec 3>"/var/run/udhcpd.${IFACE}.conf"
printf 'interface %s\n' "${IFACE}" >&3
printf 'pidfile /var/run/udhcpd.%s.pid\n' "${IFACE}" >&3
printf 'lease_file /var/lib/misc/udhcpd.%s.leases\n' "${IFACE}" >&3
}
dhcpd_opt_cb()
{
local key="${1}"
shift 1
local val="${*}"
case "${key}" in
dhcpd-*)
if ! ${dhcpd_enabled}; then
dhcpd_start_config
dhcpd_enabled=true
fi
key="$(printf '%s\n' "${key#dhcpd-}" | tr '-' '_')"
printf '%s %s\n' "${key}" "${val}" >&3
;;
address)
address="${val}"
;;
subnet)
subnet="${val}"
;;
gateway)
gateway="${val}"
;;
esac
}
dhcpd_end_config()
{
printf 'option subnet %s\n' "${subnet}" >&3
if [ "x${gateway}" != 'x' ]; then
printf 'option router %s\n' "${gateway}" >&3
else
printf 'option router %s\n' "${address}" >&3
fi
sed 's/nameserver/option dns/' /etc/resolv.conf >&3
exec &3>-
udhcpd -S "/var/run/udhcpd.${IFACE}.conf"
}
get_iface_opts dhcpd_opt_cb
if ${dhcpd_enabled}; then
dhcpd_end_config
fi
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