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"""Defines Features Reply classes and related items.""" |
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# System imports |
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# Third-party imports |
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# Local source tree imports |
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from pyof.foundation.base import GenericBitMask, GenericMessage |
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from pyof.foundation.basic_types import Pad, UBInt8, UBInt32, UBInt64 |
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from pyof.v0x04.common.header import Header, Type |
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__all__ = ('FeaturesReply', 'Capabilities', 'SwitchFeatures') |
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class Capabilities(GenericBitMask): |
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"""Capabilities supported by the datapath.""" |
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#: Flow statistics |
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OFPC_FLOW_STATS = 1 << 0 |
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#: Table statistics |
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OFPC_TABLE_STATS = 1 << 1 |
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#: Port statistics |
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OFPC_PORT_STATS = 1 << 2 |
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#: Group statistics. |
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OFPC_GROUP_STATS = 1 << 3 |
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#: Can reassembe IP fragments |
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OFPC_IP_REASM = 1 << 5 |
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#: Queue statistics |
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OFPC_QUEUE_STATS = 1 << 6 |
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#: Switch will block looping ports. |
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OFPC_PORT_BLOCKED = 1 << 8 |
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# Classes |
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View Code Duplication |
class SwitchFeatures(GenericMessage): |
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"""Message sent by the switch device to the controller. |
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This message is the response for a features_request message, sent by the |
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controller to the switch device. The 'OFPT_FEATURES_REPLY' message inherits |
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from this class, despite the strange name. |
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""" |
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header = Header(message_type=Type.OFPT_FEATURES_REPLY) |
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datapath_id = UBInt64() |
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n_buffers = UBInt32() |
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n_tables = UBInt8() |
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auxiliary_id = UBInt8() |
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#: Align to 64-bits. |
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pad = Pad(2) |
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# Features |
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capabilities = UBInt32(enum_ref=Capabilities) |
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reserved = UBInt32() |
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def __init__(self, xid=None, datapath_id=None, n_buffers=None, |
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n_tables=None, auxiliary_id=None, capabilities=None, |
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reserved=None): |
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"""The constructor just assings parameters to object attributes. |
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Args: |
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xid (int): xid to be used on the message header. |
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datapath_id (int): Datapath unique ID. |
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The lower 48-bits are for MAC address, while |
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the upper 16-bits are implementer-defined. |
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n_buffers (int): Max packets buffered at once. |
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n_tables (int): Number of tables supported by datapath. |
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auxiliary_id (int): Identify auxiliary connections. |
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capabilities (int): bitmap of supported capabilities. |
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reserved (int): Reserved. |
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""" |
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super().__init__(xid) |
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self.datapath_id = datapath_id |
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self.n_buffers = n_buffers |
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self.n_tables = n_tables |
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self.auxiliary_id = auxiliary_id |
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self.capabilities = capabilities |
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self.reserved = reserved |
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class FeaturesReply(SwitchFeatures): |
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"""'OFPT_FEATURES_REPLY' message.""" |
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cemsbr /
python-openflow
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