48 lines
1.5 KiB
Python
48 lines
1.5 KiB
Python
# Copyright (C) 2012 Nippon Telegraph and Telephone Corporation.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import struct
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from . import packet_base
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from . import vlan
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from . import mpls
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from ryu.ofproto import ether
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class ethernet(packet_base.PacketBase):
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_PACK_STR = '!6s6sH'
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_MIN_LEN = struct.calcsize(_PACK_STR)
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def __init__(self, dst, src, ethertype):
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super(ethernet, self).__init__()
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self.dst = dst
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self.src = src
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self.ethertype = ethertype
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self.length = ethernet._MIN_LEN
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@classmethod
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def parser(cls, buf):
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dst, src, ethertype = struct.unpack_from(cls._PACK_STR, buf)
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return cls(dst, src, ethertype), ethernet.get_packet_type(ethertype)
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def serialize(self, payload, prev):
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return struct.pack(ethernet._PACK_STR, self.dst, self.src,
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self.ethertype)
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# copy vlan _TYPES
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ethernet._TYPES = vlan.vlan._TYPES
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ethernet.register_packet_type(vlan.vlan, ether.ETH_TYPE_8021Q)
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ethernet.register_packet_type(mpls.mpls, ether.ETH_TYPE_MPLS)
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