Experimenter_current.py

# Copyright (C) 2011 Nippon Telegraph and Telephone Corporation.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from ryu.base import app_manager
from ryu.controller import ofp_event
from ryu.controller.handler import CONFIG_DISPATCHER, MAIN_DISPATCHER
from ryu.controller.handler import set_ev_cls
from ryu.ofproto import ofproto_v1_3
from ryu.lib.packet import packet
from ryu.lib.packet import ethernet
from ryu.lib.packet import ether_types
# import newanalysis
# import get_tree
import time as time_linger
# import struct
# from ryu import utils
# from ryu.ofproto import ether
# from ryu.ofproto import inet
from ryu.ofproto.ofproto_v1_2 import OFPG_ANY
# from ryu.lib import hub

# import pandas as pd
# from pandas import Series
# import numpy as np
# import pydotplus
# from sklearn import tree
# from sklearn.externals.six import StringIO
# from sklearn.metrics import precision_recall_curve
# from sklearn.metrics import classification_report
# from sklearn.model_selection import train_test_split
# from sklearn.metrics import precision_recall_fscore_support as score
# import re
# import ctypes
# import subprocess
# import threading


class SimpleSwitch13(app_manager.RyuApp):
    OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION]

    def __init__(self, *args, **kwargs):
        super(SimpleSwitch13, self).__init__(*args, **kwargs)
        self.mac_to_port = {}
        # self.thread_list = []
        # for i in xrange(5):
        #     print i, "here"
        #     sthread = threading.Thread(
        #         target=self._get_realtime_data)
        #     sthread.start()
        #     self.thread_list.append(sthread)
        # print "after spawn"

    # def _get_realtime_data(self):
    #     ll = ctypes.cdll.LoadLibrary
    #     lib = ll("/home/lin/controller_project/receivea.so")
    #     # lib.fack(number)

    @set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER)
    def switch_features_handler(self, ev):
        datapath = ev.msg.datapath
        ofproto = datapath.ofproto
        parser = datapath.ofproto_parser

        # install table-miss flow entry
        #
        # We specify NO BUFFER to max_len of the output action due to
        # OVS bug. At this moment, if we specify a lesser number, e.g.,
        # 128, OVS will send Packet-In with invalid buffer_id and
        # truncated packet data. In that case, we cannot output packets
        # correctly.  The bug has been fixed in OVS v2.1.0.
        match = parser.OFPMatch()
        actions = [parser.OFPActionOutput(ofproto.OFPP_CONTROLLER,
                                          ofproto.OFPCML_NO_BUFFER)]
        self.add_flow(datapath, 0, match, actions)
        # print "switch_features_handler"

    def add_flow(self, datapath, priority, match, actions, buffer_id=None):
        ofproto = datapath.ofproto
        parser = datapath.ofproto_parser

        inst = [parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
                                             actions)]
        if buffer_id:
            mod = parser.OFPFlowMod(datapath=datapath, buffer_id=buffer_id,
                                    priority=priority, match=match,
                                    instructions=inst)
        else:
            mod = parser.OFPFlowMod(datapath=datapath, priority=priority,
                                    match=match, instructions=inst)
        datapath.send_msg(mod)

    @set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
    def _packet_in_handler(self, ev):
        # If you hit this you might want to increase
        # the "miss_send_length" of your switch
        if ev.msg.msg_len < ev.msg.total_len:
            self.logger.debug("packet truncated: only %s of %s bytes",
                              ev.msg.msg_len, ev.msg.total_len)
        msg = ev.msg
        datapath = msg.datapath
        ofproto = datapath.ofproto
        parser = datapath.ofproto_parser
        in_port = msg.match['in_port']

        pkt = packet.Packet(msg.data)
        eth = pkt.get_protocols(ethernet.ethernet)[0]
        # print "_packet_in_handler"
        if eth.ethertype == ether_types.ETH_TYPE_LLDP:
            # ignore lldp packet
            return
        dst = eth.dst
        src = eth.src

        dpid = datapath.id
        self.mac_to_port.setdefault(dpid, {})

        self.logger.info("packet in %s %s %s %s", dpid, src, dst, in_port)

        # learn a mac address to avoid FLOOD next time.
        self.mac_to_port[dpid][src] = in_port

        if dst in self.mac_to_port[dpid]:
            out_port = self.mac_to_port[dpid][dst]
        else:
            out_port = ofproto.OFPP_FLOOD

        actions = [parser.OFPActionOutput(out_port)]

        # install a flow to avoid packet_in next time
        if out_port != ofproto.OFPP_FLOOD:
            match = parser.OFPMatch(in_port=in_port, eth_dst=dst)
            # verify if we have a valid buffer_id, if yes avoid to send both
            # flow_mod & packet_out
            if msg.buffer_id != ofproto.OFP_NO_BUFFER:
                self.add_flow(datapath, 1, match, actions, msg.buffer_id)
                return
            else:
                self.add_flow(datapath, 1, match, actions)
        data = None
        if msg.buffer_id == ofproto.OFP_NO_BUFFER:
            data = msg.data

        out = parser.OFPPacketOut(datapath=datapath, buffer_id=msg.buffer_id,
                                  in_port=in_port, actions=actions, data=data)
        datapath.send_msg(out)
        if(int(time_linger.time()) % 6) == 0:
            try:
                ftmp = open('tree.csv', 'rb')
                tree = ftmp.readline()
                # print tree
            except Exception:
                print 'tree.csv open failed'
            if tree != "":
                print "------------------------------------------------------------------"
                print tree
                self.install_experimental_flow(tree, ev)

    def install_experimental_flow(self, tree, ev):
        msg = ev.msg
        datapath = msg.datapath
        parser = datapath.ofproto_parser

        dpiActionRTSP = parser.OFPExperimenter(
            datapath, None, None, tree)

        datapath.send_msg(dpiActionRTSP)
        # print dpiActionRTSP

    def ipv4_to_str(self, integre):
        ip_list = [str((integre >> (24 - (n * 8)) & 255)) for n in range(4)]
        return '.'.join(ip_list)

    def ipv4_to_int(self, string):
        ip = string.split('.')
        assert len(ip) == 4
        i = 0
        for b in ip:
            b = int(b)
            i = (i << 8) | b
        return i

    def create_match(self, parser, fields):
        """Create OFP match struct from the list of fields."""
        match = parser.OFPMatch()
        for a in fields:
            match.append_field(*a)
        return match

    def create_flow_mod(self, datapath, idle_timeout, hard_timeout, priority,
                        table_id, match, instructions):
        """Create OFP flow mod message."""
        ofproto = datapath.ofproto
        # print datapath.id
        flow_mod = datapath.ofproto_parser.OFPFlowMod(datapath, 0, 0,
                                                      table_id,
                                                      ofproto.OFPFC_ADD,
                                                      idle_timeout,
                                                      hard_timeout, priority,
                                                      ofproto.OFPCML_NO_BUFFER,
                                                      ofproto.OFPP_ANY,
                                                      OFPG_ANY, 0,
                                                      match, instructions)
        return flow_mod