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[vsorcdistro/.git] / ryu / build / lib.linux-armv7l-2.7 / ryu / lib / packet / vlan.py

diff --git a/ryu/build/lib.linux-armv7l-2.7/ryu/lib/packet/vlan.py b/ryu/build/lib.linux-armv7l-2.7/ryu/lib/packet/vlan.py
new file mode 100644 (file)
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+# Copyright (C) 2012 Nippon Telegraph and Telephone Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import abc
+import six
+import struct
+from . import packet_base
+from . import arp
+from . import ipv4
+from . import ipv6
+from . import lldp
+from . import slow
+from . import llc
+from . import pbb
+from . import cfm
+from . import ether_types as ether
+
+
+@six.add_metaclass(abc.ABCMeta)
+class _vlan(packet_base.PacketBase):
+    _PACK_STR = "!HH"
+    _MIN_LEN = struct.calcsize(_PACK_STR)
+
+    @abc.abstractmethod
+    def __init__(self, pcp, cfi, vid, ethertype):
+        super(_vlan, self).__init__()
+        self.pcp = pcp
+        self.cfi = cfi
+        self.vid = vid
+        self.ethertype = ethertype
+
+    @classmethod
+    def parser(cls, buf):
+        tci, ethertype = struct.unpack_from(cls._PACK_STR, buf)
+        pcp = tci >> 13
+        cfi = (tci >> 12) & 1
+        vid = tci & ((1 << 12) - 1)
+        return (cls(pcp, cfi, vid, ethertype),
+                vlan.get_packet_type(ethertype), buf[vlan._MIN_LEN:])
+
+    def serialize(self, payload, prev):
+        tci = self.pcp << 13 | self.cfi << 12 | self.vid
+        return struct.pack(vlan._PACK_STR, tci, self.ethertype)
+
+
+class vlan(_vlan):
+    """VLAN (IEEE 802.1Q) header encoder/decoder class.
+
+    An instance has the following attributes at least.
+    Most of them are same to the on-wire counterparts but in host byte order.
+    __init__ takes the corresponding args in this order.
+
+    ============== ====================
+    Attribute      Description
+    ============== ====================
+    pcp            Priority Code Point
+    cfi            Canonical Format Indicator
+    vid            VLAN Identifier
+    ethertype      EtherType
+    ============== ====================
+    """
+
+    def __init__(self, pcp=0, cfi=0, vid=0, ethertype=ether.ETH_TYPE_IP):
+        super(vlan, self).__init__(pcp, cfi, vid, ethertype)
+
+    @classmethod
+    def get_packet_type(cls, type_):
+        """Override method for the Length/Type field (self.ethertype).
+        The Length/Type field means Length or Type interpretation,
+        same as ethernet IEEE802.3.
+        If the value of Length/Type field is less than or equal to
+        1500 decimal(05DC hexadecimal), it means Length interpretation
+        and be passed to the LLC sublayer."""
+        if type_ <= ether.ETH_TYPE_IEEE802_3:
+            type_ = ether.ETH_TYPE_IEEE802_3
+        return cls._TYPES.get(type_)
+
+
+class svlan(_vlan):
+    """S-VLAN (IEEE 802.1ad) header encoder/decoder class.
+
+
+    An instance has the following attributes at least.
+    Most of them are same to the on-wire counterparts but in host byte order.
+    __init__ takes the corresponding args in this order.
+
+    .. tabularcolumns:: |l|L|
+
+    ============== ====================
+    Attribute      Description
+    ============== ====================
+    pcp            Priority Code Point
+    cfi            Canonical Format Indicator.
+                   In a case to be used as B-TAG,
+                   this field means DEI(Drop Eligible Indication).
+    vid            VLAN Identifier
+    ethertype      EtherType
+    ============== ====================
+    """
+
+    def __init__(self, pcp=0, cfi=0, vid=0, ethertype=ether.ETH_TYPE_8021Q):
+        super(svlan, self).__init__(pcp, cfi, vid, ethertype)
+
+    @classmethod
+    def get_packet_type(cls, type_):
+        return cls._TYPES.get(type_)
+
+
+vlan.register_packet_type(arp.arp, ether.ETH_TYPE_ARP)
+vlan.register_packet_type(ipv4.ipv4, ether.ETH_TYPE_IP)
+vlan.register_packet_type(ipv6.ipv6, ether.ETH_TYPE_IPV6)
+vlan.register_packet_type(lldp.lldp, ether.ETH_TYPE_LLDP)
+vlan.register_packet_type(slow.slow, ether.ETH_TYPE_SLOW)
+vlan.register_packet_type(llc.llc, ether.ETH_TYPE_IEEE802_3)
+vlan.register_packet_type(cfm.cfm, ether.ETH_TYPE_CFM)
+
+svlan.register_packet_type(vlan, ether.ETH_TYPE_8021Q)
+svlan.register_packet_type(pbb.itag, ether.ETH_TYPE_8021AH)