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"""Flow serializer for OF 1.0.""" |
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from pyof.v0x01.common.action import ActionOutput, ActionType, ActionVlanVid |
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from pyof.v0x01.common.phy_port import Port |
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from pyof.v0x01.controller2switch.flow_mod import FlowMod |
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from napps.kytos.flow_manager.serializers.base import FlowSerializer |
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class FlowSerializer10(FlowSerializer): |
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"""Flow serializer for OpenFlow 1.0.""" |
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def __init__(self): |
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"""Initialize OF 1.0 specific variables.""" |
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super().__init__() |
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self.match_attributes = set(( |
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'in_port', |
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'dl_src', |
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'dl_dst', |
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'dl_type', |
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'dl_vlan', |
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'dl_vlan_pcp', |
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'nw_src', |
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'nw_dst', |
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'nw_proto')) |
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def from_dict(self, dictionary): |
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"""Return an OF 1.0 FlowMod message from serialized dictionary.""" |
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flow_mod = FlowMod() |
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for field, data in dictionary.items(): |
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if field in self.flow_attributes: |
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setattr(flow_mod, field, data) |
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elif field == 'match': |
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self._update_match(flow_mod.match, data) |
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elif field == 'actions': |
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actions = self._actions_from_list(data) |
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flow_mod.actions.extend(actions) |
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return flow_mod |
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def _update_match(self, match, dictionary): |
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"""Update match attributes found in dictionary.""" |
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for field, data in dictionary.items(): |
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if field in self.match_attributes: |
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setattr(match, field, data) |
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@staticmethod |
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def _actions_from_list(action_list): |
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"""Return actions found in the action list.""" |
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actions = [] |
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for action in action_list: |
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if action['action_type'] == 'set_vlan': |
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new_action = ActionVlanVid(vlan_id=action['vlan_id']) |
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elif action['action_type'] == 'output': |
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if action['port'] == 'controller': |
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new_action = ActionOutput(port=Port.OFPP_CONTROLLER) |
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else: |
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new_action = ActionOutput(port=action['port']) |
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else: |
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continue |
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actions.append(new_action) |
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return actions |
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def to_dict(self, flow_stats): |
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"""Return a dictionary created from OF 1.0 FlowStats.""" |
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flow_dict = {field: data.value |
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for field, data in vars(flow_stats).items() |
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if field in self.flow_attributes} |
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match_dict = {} |
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for field, data in vars(flow_stats.match).items(): |
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if field in self.match_attributes: |
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match_dict[field] = data.value |
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actions_list = [] |
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for action in flow_stats.actions: |
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if action.action_type == ActionType.OFPAT_SET_VLAN_VID: |
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actions_list.append({'action_type': 'set_vlan', |
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'vlan_id': action.vlan_id.value}) |
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elif action.action_type == ActionType.OFPAT_OUTPUT: |
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if action.port == Port.OFPP_CONTROLLER: |
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actions_list.append({'action_type': 'output', |
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'port': 'controller'}) |
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else: |
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actions_list.append({'action_type': 'output', |
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'port': action.port.value}) |
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flow_dict.update({'match': match_dict, 'actions': actions_list}) |
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return flow_dict |
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kytos /
flow_manager
