// Copyright (c) 2016-present Cloud <cloud@txthinking.com>
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of version 3 of the GNU General Public
// License as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.

package brook

import (
	"net"

	"github.com/krolaw/dhcp4/conn"
)

func DHCPListen(iface string) (net.PacketConn, error) {
	if iface == "" {
		return net.ListenPacket("udp4", ":67")
	}
	return conn.NewUDP4BoundListener(iface, ":67")
}