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  1. # your code goes here
  2. ….# Copyright (C) 2011 Nippon Telegraph and Telephone Corporation.
  3. #
  4. # Licensed under the Apache License, Version 2.0 (the "License");
  5. # you may not use this file except in compliance with the License.
  6. # You may obtain a copy of the License at
  7. #
  8. #    http://w...content-available-to-author-only...e.org/licenses/LICENSE-2.0
  9. #
  10. # Unless required by applicable law or agreed to in writing, software
  11. # distributed under the License is distributed on an "AS IS" BASIS,
  12. # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
  13. # implied.
  14. # See the License for the specific language governing permissions and
  15. # limitations under the License.
  16.  
  17. from ryu.base import app_manager
  18. from ryu.controller import ofp_event
  19. from ryu.controller.handler import CONFIG_DISPATCHER, MAIN_DISPATCHER
  20. from ryu.controller.handler import set_ev_cls
  21. from ryu.ofproto import ofproto_v1_3
  22. from ryu.lib.packet import packet
  23. from ryu.lib.packet import ethernet
  24. from ryu.lib.packet import ether_types
  25.  
  26.  
  27. class SimpleSwitch13(app_manager.RyuApp):
  28.     OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION]
  29.  
  30.     def __init__(self, *args, **kwargs):
  31.         super(SimpleSwitch13, self).__init__(*args, **kwargs)
  32.         self.mac_to_port = {}
  33.  
  34.     @set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER)
  35.     def switch_features_handler(self, ev):
  36.         datapath = ev.msg.datapath #ev.msg 是用來儲存對應事件的 OpenFlow 訊息類別實體
  37.         ofproto = datapath.ofproto
  38.         parser = datapath.ofproto_parser
  39.         #print(ofproto)
  40.         #print(parser)
  41.         # install table-miss flow entry
  42.         #
  43.         # We specify NO BUFFER to max_len of the output action due to
  44.         # OVS bug. At this moment, if we specify a lesser number, e.g.,
  45.         # 128, OVS will send Packet-In with invalid buffer_id and
  46.         # truncated packet data. In that case, we cannot output packets
  47.         # correctly.  The bug has been fixed in OVS v2.1.0.
  48.  
  49.  
  50.         match = parser.OFPMatch()
  51.         #print(match)
  52.         actions = [parser.OFPActionOutput(ofproto.OFPP_CONTROLLER,
  53.                                           ofproto.OFPCML_NO_BUFFER)]
  54.         #print(actions)
  55.  
  56.  
  57.         self.add_flow(datapath, 0, match, actions)
  58.  
  59.         #meter examples
  60.         #add meters,m_id meter_id,unit of rate:Kbps
  61.         #self.meter_table ={"00:00:00:00:00:01":1,"00:00:00:00:00:02":1}
  62.         #for m_id in range(1,2):$
  63.         #m_id = 1
  64.         #bands = [parser.OFPMeterBandDrop(type_=ofproto.OFPMBT_DROP, len_=0,rate=50, burst_size=10)]
  65.         #self.add_meter(datapath,bands,m_id)
  66.  
  67.  
  68.         # add rule for metering in s1
  69.         if ev.msg.datapath.id == 1:
  70.             datapath = ev.msg.datapath
  71.             ofproto = datapath.ofproto
  72.             parser = datapath.ofproto_parser
  73.  
  74.             #seed_file = open("./cntr.txt", "r")
  75.             #seed_num = seed_file.read()
  76.             #print("seed num:",seed_num)
  77.             #seed_num.split()
  78.             input_file_name = "./input_5_seed1.txt"
  79.             input_file = open(input_file_name, "r")
  80.             print("input file: ", input_file_name)
  81.             content = input_file.readlines()
  82.  
  83.             for i in content:
  84.                 line = i.split()
  85.                 flow_id_buf = int(line[0])
  86.                 flow_rate_buf = (int)(int(line[1]) * 1.1)
  87.                 print('id: ', flow_id_buf, ' d(f): ', flow_rate_buf)
  88.  
  89.                 bands = [parser.OFPMeterBandDrop(type_ = ofproto.OFPMBT_DROP, len_ = 0,rate= flow_rate_buf, burst_size = 5)]
  90.                 req = parser.OFPMeterMod(datapath = datapath, command = ofproto.OFPMC_ADD, flags = ofproto.OFPMF_KBPS, meter_id = flow_id_buf + 1 , bands = bands)
  91.                 #set up a controller,send for switch request
  92.                 print("meter id :",bands)
  93.                 datapath.send_msg(req)
  94.  
  95.                 ip_src = "10.0.0." + str((flow_id_buf + 1) % 256)
  96.                 ip_dst = "10.0.0." + str((flow_id_buf + 1 + 5) % 256)
  97.                 #print(ip_dst)
  98.                 match = parser.OFPMatch(in_port = flow_id_buf + 1 , eth_type = 0x0800, ipv4_src = ip_src, ipv4_dst = ip_dst)
  99.                 actions = [parser.OFPActionOutput(121)]
  100.                 inst = [parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS, actions), parser.OFPInstructionMeter(flow_id_buf + 1, ofproto.OFPIT_METER)]
  101.                 mod = datapath.ofproto_parser.OFPFlowMod(
  102.                     datapath=datapath, match=match, cookie=0,
  103.                     command=ofproto.OFPFC_ADD, idle_timeout=0,  
  104.                     hard_timeout=0, priority=3, instructions=inst)
  105.  
  106.                 #t_start = time.time()
  107.  
  108.                 datapath.send_msg(mod)
  109.  
  110.     #def add_meter(self,datapath,bands,meter_id):
  111.         #ofproto=datapath.ofproto
  112.         #parser =datapath.ofproto_parser
  113.         #print(meter)
  114.         #req = parser.OFPMeterMod(datapath=datapath,command=ofproto.OFPMC_ADD,flags=ofproto.OFPMF_KBPS,meter_id=meter_id,bands=bands)
  115.         #datapath.send_msg(req)
  116.  
  117.  
  118.     def add_flow(self, datapath, priority, match, actions, buffer_id=None):
  119.         ofproto = datapath.ofproto
  120.         parser = datapath.ofproto_parser
  121.  
  122.         inst = [parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
  123.                                              actions)]
  124.  
  125.         if buffer_id:
  126.             mod = parser.OFPFlowMod(datapath=datapath, buffer_id=buffer_id,
  127.                                     priority=priority, match=match,
  128.                                     instructions=inst)
  129.         else:
  130.             mod = parser.OFPFlowMod(datapath=datapath, priority=priority,
  131.                                     match=match, instructions=inst)
  132.  
  133.         datapath.send_msg(mod)
  134.  
  135.     @set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
  136.     def _packet_in_handler(self, ev):
  137.         # If you hit this you might want to increase
  138.         # the "miss_send_length" of your switch
  139.         if ev.msg.msg_len < ev.msg.total_len:
  140.             self.logger.debug("packet truncated: only %s of %s bytes",
  141.                               ev.msg.msg_len, ev.msg.total_len)
  142.         msg = ev.msg
  143.         datapath = msg.datapath
  144.         ofproto = datapath.ofproto
  145.         parser = datapath.ofproto_parser
  146.         in_port = msg.match['in_port']
  147.         pkt = packet.Packet(msg.data)
  148.         eth = pkt.get_protocols(ethernet.ethernet)[0]
  149.         #if eth.ethertype == ether_types.ETH_TYPE_LLDP:
  150.             # ignore lldp packet
  151.         #    return
  152.         dst = eth.dst
  153.         src = eth.src
  154.         dpid = format(datapath.id, "d").zfill(4)
  155.         self.mac_to_port.setdefault(dpid, {})
  156.         #print("......................................")
  157.         #print("Add switch",dpid,"to mac_to_port table")
  158.         #print("......................................")
  159.  
  160.         self.logger.info("packet in %s %s %s %s", dpid, src, dst, in_port)
  161.         # learn a mac address to avoid FLOOD next time
  162.         print(self.mac_to_port[dpid])
  163.  
  164.         self.mac_to_port[dpid][src] = in_port
  165.         #dpid=switch id,src=host mac 
  166.  
  167.         if dst in self.mac_to_port[dpid]:
  168.             out_port = self.mac_to_port[dpid][dst]         
  169.             ##add flow with meter id
  170.             # when traffic generated frm src x.x.x.x. will be applied to a meter_id
  171.             #meter_id =self.meter_table[src]
  172.         else:
  173.             out_port = ofproto. OFPP_FLOOD
  174.  
  175.         actions = [parser.OFPActionOutput(out_port)]
  176.  
  177.  
  178.         # install a flow to avoid packet_in next time
  179.         if out_port != ofproto.OFPP_FLOOD:
  180.             match = parser.OFPMatch(in_port=in_port, eth_dst=dst, eth_src=src)
  181.             # verify if we have a valid buffer_id, if yes avoid to send both
  182.             # flow_mod & packet_out
  183.             if msg.buffer_id != ofproto.OFP_NO_BUFFER:
  184.                 self.add_flow(datapath, 1, match, actions,msg.buffer_id)
  185.                 return
  186.             else:
  187.                 self.add_flow(datapath, 1, match, actions)
  188.         data = None
  189.         if msg.buffer_id == ofproto.OFP_NO_BUFFER:
  190.             data = msg.data
  191.  
  192.         out = parser.OFPPacketOut(datapath=datapath, buffer_id=msg.buffer_id,
  193.                                   in_port=in_port, actions=actions, data=data)
  194.         datapath.send_msg(out)
  195.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
Traceback (most recent call last):
  File "/usr/lib/python3.7/py_compile.py", line 143, in compile
    _optimize=optimize)
  File "<frozen importlib._bootstrap_external>", line 791, in source_to_code
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "./prog.py", line 2
    ….# Copyright (C) 2011 Nippon Telegraph and Telephone Corporation.
    ^
SyntaxError: invalid character in identifier

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python3.7/py_compile.py", line 147, in compile
    raise py_exc
py_compile.PyCompileError:   File "./prog.py", line 2
    ….# Copyright (C) 2011 Nippon Telegraph and Telephone Corporation.
    ^
SyntaxError: invalid character in identifier
stdout
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Standard output is empty
https://ideone.com/RMHpFr
language:
Python 3 (python  3.9.5)
created:
1 year ago
visibility:
public

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