vd_pkt

%% Copyright (c) 2009-2016, Michael Santos <michael.santos@gmail.com>
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-module(pkt_ether).

-include("pkt_ether.hrl").

-export([codec/1, type/1]).

type(?ETH_P_IP) -> ipv4;
type(?ETH_P_IPV6) -> ipv6;
type(?ETH_P_ARP) -> arp;
type(?ETH_P_RARP) -> rarp;
type(?ETH_P_LLDP) -> lldp;
%% IEEE 802.3 Ethernet
type(EtherType) when EtherType < 16#05DC -> llc;
%% 802.1Q Virtual LAN
type(?ETH_P_802_1Q) -> '802.1q';
%% 802.1X EAPoL
type(?ETH_P_802_1X) -> '802.1x';
%% 802.1ad (802.1q QinQ)
type(?ETH_P_802_1QinQ) -> '802.1qinq';
%% MPLS_
type(?ETH_P_MPLS_UNI) -> mpls;
type(?ETH_P_MPLS_MULTI) -> mpls.

codec(<<Dhost:6/bytes, Shost:6/bytes, Type:16, Payload/binary>>) ->
%    Len = byte_size(Packet) - 4,
%    <<Payload:Len/bytes, CRC:4/bytes>> = Packet,
    {#ether{
       dhost = Dhost, shost = Shost,
       type = Type
      }, Payload};
codec(#ether{
       dhost = Dhost, shost = Shost,
       type = Type
      }) ->
    <<Dhost:6/bytes, Shost:6/bytes, Type:16>>.