trema/trema-edge

#
# Copyright (C) 2008-2013 NEC Corporation
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2, 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#


module Trema
  class Mpls < BasicAction
    #
    # 0x8847 - Multiprotocol Label Switching
    # 0x8848 - Multiprotocol Label Switching with Upstream-assigned Label
    #
    MPLS_ETHER_TAGS = [ 0x8847, 0x8848 ]


    unsigned_int16 :ether_type, presence: true, within: :check_mpls_ether_type


    def check_mpls_ether_type ether_type, name 
      unless MPLS_ETHER_TAGS.include? ether_type
        raise ArgumentError, "Invalid #{ name } specified." 
      end
    end
  end
end


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