fs2.protocols.ethernet.EthernetFrameHeader.scala Maven / Gradle / Ivy
/*
* Copyright (c) 2013 Functional Streams for Scala
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
// Adapted from scodec-protocols, licensed under 3-clause BSD
package fs2.protocols
package ethernet
import scodec.Codec
import scodec.codecs._
import fs2.interop.scodec._
import com.comcast.ip4s.MacAddress
/** Header of an ethernet frame as captured in a pcap file.
*/
case class EthernetFrameHeader(
destination: MacAddress,
source: MacAddress,
ethertypeOrLength: Int
) {
def length: Option[Int] = if (ethertypeOrLength <= 1500) Some(ethertypeOrLength) else None
def ethertype: Option[Int] = if (ethertypeOrLength > 1500) Some(ethertypeOrLength) else None
}
object EthernetFrameHeader {
// format: off
implicit val codec: Codec[EthernetFrameHeader] = {
("destination" | Ip4sCodecs.macAddress) ::
("source" | Ip4sCodecs.macAddress) ::
("ethertype" | uint16)
}.as[EthernetFrameHeader]
// format: on
val sdecoder: StreamDecoder[EthernetFrameHeader] = StreamDecoder.once(codec)
}