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""" |
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Module to process OpenFlow 1.3 packet manipulation |
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""" |
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6
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from kytos.core import KytosEvent, log |
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from napps.amlight.sdntrace import settings |
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from pyof.foundation.network_types import Ethernet |
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from pyof.v0x04.common.action import ActionOutput |
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from pyof.v0x04.controller2switch.packet_out import PacketOut |
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from napps.kytos.of_core.msg_prios import of_msg_prio |
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def packet_in(event, packet_in_msg): |
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""" Process OpenFlow 1.3 PacketIn messages |
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Args: |
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event: PacketIN event |
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packet_in_msg: PacketIn msg |
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Return: |
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ethernet: PacketIn data |
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in_port: in_port |
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switch: OpenFlow datapath |
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0, 0, 0 if it is not a trace probe |
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""" |
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ethernet = Ethernet() |
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ethernet.unpack(packet_in_msg.data.value) |
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if settings.COLOR_VALUE in ethernet.source.value: |
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log.debug("OpenFlow 1.3 PacketIn Trace Msg Received") |
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in_port = event.message.in_port |
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switch = event.source.switch |
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return ethernet, in_port, switch |
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log.debug("PacketIn is not a Data Trace Probe") |
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return 0, 0, 0 |
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def send_packet_out(controller, switch, port, data): |
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""" Just prepare the PacketOut to be used by the Tracer. |
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Args: |
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controller: Kytos controller |
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switch: OpenFlow datapath |
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port: in_port |
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data: Ethernet frame |
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Return: |
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output_action = ActionOutput |
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""" |
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output_action = ActionOutput() |
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output_action.port = settings.OFPP_TABLE_13 |
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packet_out = PacketOut() |
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packet_out.actions.append(output_action) |
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packet_out.in_port = port |
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packet_out.data = bytes(data) |
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event_out = KytosEvent( |
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name='kytos/of_lldp.messages.out.ofpt_packet_out', |
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priority=of_msg_prio(packet_out.header.message_type.value), |
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content={'destination': switch.connection, |
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'message': packet_out} |
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) |
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log.debug('PacketOut %s sent' % event_out.content) |
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controller.buffers.msg_out.put(event_out) |
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kytos-ng /
sdntrace
