85 lines
2.9 KiB
Python
85 lines
2.9 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 logging
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import struct
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from ryu.base import app_manager
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from ryu.controller import ofp_event
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from ryu.controller import dpset
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from ryu.controller.handler import MAIN_DISPATCHER
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from ryu.controller.handler import set_ev_cls
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from ryu.ofproto import ofproto_v1_2
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from ryu.ofproto import ether
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from ryu.lib.mac import haddr_to_str
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LOG = logging.getLogger(__name__)
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class RunTestMininet(app_manager.RyuApp):
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_CONTEXTS = {'dpset': dpset.DPSet}
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OFP_VERSIONS = [ofproto_v1_2.OFP_VERSION]
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def __init__(self, *args, **kwargs):
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super(RunTestMininet, self).__init__(*args, **kwargs)
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def _add_flow(self, dp, match, actions):
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inst = [dp.ofproto_parser.OFPInstructionActions(
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dp.ofproto.OFPIT_APPLY_ACTIONS, actions)]
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mod = dp.ofproto_parser.OFPFlowMod(
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dp, cookie=0, cookie_mask=0, table_id=0,
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command=dp.ofproto.OFPFC_ADD, idle_timeout=0, hard_timeout=0,
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priority=0xff, buffer_id=0xffffffff,
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out_port=dp.ofproto.OFPP_ANY, out_group=dp.ofproto.OFPG_ANY,
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flags=0, match=match, instructions=inst)
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dp.send_msg(mod)
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def _define_flow(self, dp):
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in_port = 1
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out_port = 2
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eth_IP = ether.ETH_TYPE_IP
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# ICMP -> DecNwTtl
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LOG.debug("--- add_flow DecNwTtl")
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match = dp.ofproto_parser.OFPMatch()
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match.set_in_port(in_port)
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match.set_dl_type(eth_IP)
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actions = [dp.ofproto_parser.OFPActionDecNwTtl(),
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dp.ofproto_parser.OFPActionOutput(out_port, 0)]
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self._add_flow(dp, match, actions)
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@set_ev_cls(dpset.EventDP, dpset.DPSET_EV_DISPATCHER)
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def handler_datapath(self, ev):
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if ev.enter:
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self._define_flow(ev.dp)
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@set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
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def packet_in_handler(self, ev):
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msg = ev.msg
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dst, src, eth_type = struct.unpack_from('!6s6sH', buffer(msg.data), 0)
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in_port = msg.match.fields[0].value
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LOG.info("----------------------------------------")
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LOG.info("* PacketIn")
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LOG.info("in_port=%d, eth_type: %s", in_port, hex(eth_type))
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LOG.info("packet reason=%d buffer_id=%d", msg.reason, msg.buffer_id)
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LOG.info("packet in datapath_id=%s src=%s dst=%s",
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msg.datapath.id, haddr_to_str(src), haddr_to_str(dst))
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