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sar_application.py
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sar_application.py
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from ryu.base import app_manager
from ryu.controller import ofp_event
from ryu.controller import dpset
from ryu.controller import ofp_event
from ryu.controller.handler import CONFIG_DISPATCHER, MAIN_DISPATCHER
from ryu.app.wsgi import ControllerBase, WSGIApplication, route
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
from ryu.topology.api import get_switch, get_link, get_host, get_all_host
from ryu.topology import event, switches
import networkx as nx
import json
import logging
import struct
from webob import Response
from ryu.lib.mac import haddr_to_bin
from ryu.lib.packet.packet import Packet
from ryu.lib.packet import arp
from ryu.lib.packet import ipv4
from ryu.lib.packet import tcp
from ryu.lib.packet import udp
from ryu.ofproto import ether
from ryu.app.ofctl.api import get_datapath
from timeit import default_timer
import BinaryNode
import MultibitNode
import CompressedNode
# Packet Classification parameters
SRC_IP = 0
DST_IP = 1
PROTO = 2
SPORT = 3
DPORT = 4
ACTION = 5
TRIE = 1 # choosing the type of trie to use: 0 for Binary, 1 for Multibit, 2 for Compressed
# IP lookup parameters
IP = 0
SUBNET = 1
DPID = 2
# Topologies
TOPO = 2
class SimpleSwitch13(app_manager.RyuApp):
OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION]
_CONTEXTS = {'wsgi': WSGIApplication}
def __init__(self, *args, **kwargs):
super(SimpleSwitch13, self).__init__(*args, **kwargs)
wsgi = kwargs['wsgi']
self.topology_api_app = self
self.net = nx.DiGraph()
self.nodes = {}
self.links = {}
self.no_of_nodes = 0
self.no_of_links = 0
self.datapaths = []
self.switch_id = []
self.mac_to_port = {}
self.mac_to_dpid = {}
self.port_to_mac = {}
self.i = 0
self.trie_root = None
# Packet Classification initial parameters
self.classify = {}
self.classify["r1"] = ["195.0.0.1", "128.128.0.1", "6", "*", "1234", "allow"]
self.classify["r2"] = ["128.128.0.1", "195.0.0.1", "6", "1234", "*", "allow"]
self.classify["r3"] = ["195.0.0.1", "128.128.0.1", "1", "*", "*", "allow"]
self.classify["r4"] = ["128.128.0.1", "195.0.0.1", "1", "*", "*", "allow"]
self.classify["r5"] = ["*", "*", "*", "*", "*", "deny"]
self.counters = {}
self.counters["r1"] = 0
self.counters["r2"] = 0
self.counters["r3"] = 0
self.counters["r4"] = 0
self.counters["r5"] = 0
if TOPO == 1:
self.switch = {}
self.switch["195.0.0.254"] = ["195.0.0.254", "8", "1"]
self.switch["128.128.0.254"] = ["128.128.0.254", "12", "2"]
self.switch["154.128.0.254"] = ["154.128.0.254", "16", "3"]
self.lookup = {}
self.lookup["195.0.0.1"] = "195.0.0.254"
self.lookup["195.0.0.2"] = "195.0.0.254"
self.lookup["128.128.0.1"] = "128.128.0.254"
self.lookup["128.128.0.2"] = "128.128.0.254"
self.lookup["154.128.0.1"] = "154.128.0.254"
self.lookup["154.128.0.2"] = "154.128.0.254"
self.ip_to_mac = {}
self.ip_to_mac["195.0.0.1"] = "00:00:00:00:00:01"
self.ip_to_mac["195.0.0.2"] = "00:00:00:00:00:02"
self.ip_to_mac["128.128.0.1"] = "00:00:00:00:00:03"
self.ip_to_mac["128.128.0.2"] = "00:00:00:00:00:04"
self.ip_to_mac["154.128.0.1"] = "00:00:00:00:00:05"
self.ip_to_mac["154.128.0.2"] = "00:00:00:00:00:06"
elif TOPO == 2:
self.switch = {}
self.switch["195.0.0.254"] = ["195.0.0.254", "8", "1"]
self.switch["128.128.0.254"] = ["128.128.0.254", "12", "2"]
self.switch["154.128.0.254"] = ["154.128.0.254", "16", "3"]
self.switch["197.160.0.254"] = ["197.160.0.254", "24", "4"]
self.switch["192.168.0.254"] = ["192.168.0.254", "24", "5"]
self.switch["192.169.0.254"] = ["192.169.0.254", "24", "6"]
self.switch["192.170.0.254"] = ["192.170.0.254", "24", "7"]
self.lookup = {}
self.lookup["195.0.0.1"] = "195.0.0.254"
self.lookup["195.0.0.2"] = "195.0.0.254"
self.lookup["128.128.0.1"] = "128.128.0.254"
self.lookup["154.128.0.1"] = "154.128.0.254"
self.lookup["197.160.0.1"] = "197.160.0.254"
self.lookup["192.168.0.1"] = "192.168.0.254"
self.lookup["192.169.0.1"] = "192.169.0.254"
self.lookup["192.170.0.1"] = "192.170.0.254"
self.ip_to_mac = {}
self.ip_to_mac["195.0.0.1"] = "00:00:00:00:00:01"
self.ip_to_mac["195.0.0.2"] = "00:00:00:00:00:02"
self.ip_to_mac["128.128.0.1"] = "00:00:00:00:00:03"
self.ip_to_mac["154.128.0.1"] = "00:00:00:00:00:04"
self.ip_to_mac["197.160.0.1"] = "00:00:00:00:00:05"
self.ip_to_mac["192.168.0.1"] = "00:00:00:00:00:06"
self.ip_to_mac["192.169.0.1"] = "00:00:00:00:00:07"
self.ip_to_mac["192.170.0.1"] = "00:00:00:00:00:08"
if TRIE == 0: # Binary Trie
self.trie_root = BinaryNode.BinaryNode('0')
for key, value in self.switch.iteritems():
ip = value[0]
mask = int(value[1])
binary_address = BinaryNode.convert_in_bin(key)[:mask] # take only the network part of address
self.trie_root.AddChild(ip, binary_address)
self.logger.info("BinaryTrie created")
elif TRIE == 1: # Multibit Trie
self.trie_root = MultibitNode.MultibitNode()
for entry in self.order_switch(): # order_switch is used to have and ordinated list of ips base on mask length
ip, mask = entry
binary_address = MultibitNode.convert_in_bin(ip)[:mask] # take only the network part of address
self.trie_root.AddChild(ip, binary_address)
self.logger.info("MultibitTrie created")
elif TRIE == 2: # Compressed Trie
self.trie_root = CompressedNode.CompressedNode("0")
for key, value in self.switch.iteritems():
ip = value[0]
mask = int(value[1])
binary_address = CompressedNode.convert_in_bin(key)[:mask] # take only the network part of address
self.trie_root.AddChild(ip, binary_address)
self.logger.info("CompressedTrie created")
def order_switch(self):
'''
helper method to build a sorted list of tuples
:return: list of tuples (ip, mask) sorted by mask length
'''
tuples = []
for key, value in self.switch.iteritems():
tuples.append((value[0], value[1])) # append ip, mask
return sorted(tuples, key=lambda x: x[1])
# END OF CUSTOM CODE
def ls(self, obj):
print("\n".join([x for x in dir(obj) if x[0] != "_"]))
def send_arp(self, datapath, opcode, srcMac, srcIp, dstMac, dstIp, outPort):
if opcode == 1:
targetMac = "00:00:00:00:00:00"
targetIp = dstIp
elif opcode == 2:
targetMac = dstMac
targetIp = dstIp
e = ethernet.ethernet(dstMac, srcMac, ether.ETH_TYPE_ARP)
a = arp.arp(1, 0x0800, 6, 4, opcode, srcMac, srcIp, targetMac, targetIp)
p = Packet()
p.add_protocol(e)
p.add_protocol(a)
p.serialize()
actions = [datapath.ofproto_parser.OFPActionOutput(outPort, 0)]
out = datapath.ofproto_parser.OFPPacketOut(
datapath=datapath,
buffer_id=0xffffffff,
in_port=datapath.ofproto.OFPP_CONTROLLER,
actions=actions,
data=p.data)
datapath.send_msg(out)
@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
msg = ev.msg
self.datapaths.append(msg.datapath)
self.switch_id.append(msg.datapath_id)
match = parser.OFPMatch()
actions = [parser.OFPActionOutput(ofproto.OFPP_CONTROLLER,
ofproto.OFPCML_NO_BUFFER)]
self.add_flow(datapath, 0, match, actions)
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 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]
if eth.ethertype == ether_types.ETH_TYPE_LLDP:
# ignore lldp packet
return
dst = eth.dst
src = eth.src
dpid_src = datapath.id
# TOPOLOGY DISCOVERY------------------------------------------
switch_list = get_switch(self.topology_api_app, None)
switches = [switch.dp.id for switch in switch_list]
self.net.add_nodes_from(switches)
links_list = get_link(self.topology_api_app, None)
links = [(link.src.dpid, link.dst.dpid, {'port': link.src.port_no}) for link in links_list]
self.net.add_edges_from(links)
links = [(link.dst.dpid, link.src.dpid, {'port': link.dst.port_no}) for link in links_list]
self.net.add_edges_from(links)
# print links
# MAC LEARNING-------------------------------------------------
self.mac_to_port.setdefault(dpid_src, {})
self.mac_to_port.setdefault(src, {})
self.port_to_mac.setdefault(dpid_src, {})
self.mac_to_port[dpid_src][src] = in_port
self.mac_to_dpid[src] = dpid_src
self.port_to_mac[dpid_src][in_port] = src
self.logger.info("Packet in the controller from switch: %s", dpid_src)
# print self.mac_to_port
# HANDLE ARP PACKETS--------------------------------------------
if eth.ethertype == ether_types.ETH_TYPE_ARP:
arp_packet = pkt.get_protocol(arp.arp)
arp_dst_ip = arp_packet.dst_ip
arp_src_ip = arp_packet.src_ip
# self.logger.info("ARP packet from switch: %s source IP: %s destination IP: %s from port: %s", dpid_src, arp_src_ip, arp_dst_ip, in_port)
# self.logger.info("ARP packet from switch: %s source MAC: %s destination MAC:%s from port: %s", dpid_src, src, dst, in_port)
if arp_dst_ip in self.ip_to_mac:
if arp_packet.opcode == 1:
# send arp reply (SAME SUBNET)
dstIp = arp_src_ip
srcIp = arp_dst_ip
dstMac = src
srcMac = self.ip_to_mac[arp_dst_ip]
outPort = in_port
opcode = 2 # arp reply packet
self.send_arp(datapath, opcode, srcMac, srcIp, dstMac, dstIp, outPort)
else:
if arp_packet.opcode == 1:
# send arp reply (GATEWAY)
dstIp = arp_src_ip
srcIp = arp_dst_ip
dstMac = src
srcMac = self.port_to_mac[dpid_src][in_port]
outPort = in_port
opcode = 2 # arp reply packet
self.send_arp(datapath, opcode, srcMac, srcIp, dstMac, dstIp, outPort)
# HANDLE IP PACKETS-----------------------------------------------
ip4_pkt = pkt.get_protocol(ipv4.ipv4)
if ip4_pkt:
src_ip = ip4_pkt.src
dst_ip = ip4_pkt.dst
proto = str(ip4_pkt.proto)
sport = "0"
dport = "0"
if proto == "6":
tcp_pkt = pkt.get_protocol(tcp.tcp)
sport = str(tcp_pkt.src_port)
dport = str(tcp_pkt.dst_port)
if proto == "17":
udp_pkt = pkt.get_protocol(udp.udp)
sport = str(udp_pkt.src_port)
dport = str(udp_pkt.dst_port)
self.logger.info("Packet from the switch: %s, source IP: %s, destination IP: %s, From the port: %s",
dpid_src, src_ip, dst_ip, in_port)
# PACKET CLASSIFICATION FUNCTION: it returns action: "allow" or "deny"
# action_rule = self.linear_classification(src_ip, dst_ip, proto, sport, dport)
action_rule = "allow"
if action_rule == "allow":
# IP LOOKUP FUNCTION: it is zero if it didn't find a solution
# destination_switch_IP = self.linear_search(dst_ip)
destination_switch_IP = self.binary_search(dst_ip)
if destination_switch_IP != "0":
datapath_dst = get_datapath(self, int(self.switch[destination_switch_IP][DPID]))
dpid_dst = datapath_dst.id
self.logger.info(" --- Destination present on switch: %s", dpid_dst)
# Shortest path computation
path = nx.shortest_path(self.net, dpid_src, dpid_dst)
self.logger.info(" --- Shortest path: %s", path)
if len(path) == 1:
In_Port = self.mac_to_port[dpid_src][src]
Out_Port = self.mac_to_port[dpid_dst][dst]
actions_1 = [datapath.ofproto_parser.OFPActionOutput(Out_Port)]
actions_2 = [datapath.ofproto_parser.OFPActionOutput(In_Port)]
match_1 = parser.OFPMatch(in_port=In_Port, eth_dst=dst)
self.add_flow(datapath, 1, match_1, actions_1)
actions = [datapath.ofproto_parser.OFPActionOutput(Out_Port)]
data = msg.data
pkt = packet.Packet(data)
eth = pkt.get_protocols(ethernet.ethernet)[0]
# self.logger.info(" --- Changing destination mac to %s" % (eth.dst))
pkt.serialize()
out = datapath.ofproto_parser.OFPPacketOut(
datapath=datapath, buffer_id=0xffffffff, in_port=datapath.ofproto.OFPP_CONTROLLER,
actions=actions, data=pkt.data)
datapath.send_msg(out)
elif len(path) == 2:
path_port = self.net[path[0]][path[1]]['port']
actions = [datapath.ofproto_parser.OFPActionOutput(path_port)]
data = msg.data
pkt = packet.Packet(data)
eth = pkt.get_protocols(ethernet.ethernet)[0]
eth.src = self.ip_to_mac[src_ip]
eth.dst = self.ip_to_mac[dst_ip]
# self.logger.info(" --- Changing destination mac to %s" % (eth.dst))
pkt.serialize()
out = datapath.ofproto_parser.OFPPacketOut(
datapath=datapath, buffer_id=0xffffffff, in_port=datapath.ofproto.OFPP_CONTROLLER,
actions=actions, data=pkt.data)
datapath.send_msg(out)
elif len(path) > 2:
# Add flows in the middle of the network path
for i in range(1, len(path) - 1):
In_Port = self.net[path[i]][path[i - 1]]['port']
Out_Port = self.net[path[i]][path[i + 1]]['port']
dp = get_datapath(self, path[i])
# self.logger.info("Matched OpenFlow Rule = switch: %s, from in port: %s, to out port: %s, source IP: %s, and destination IP: %s", path[i], In_Port, Out_Port, src_ip, dst_ip)
actions_1 = [dp.ofproto_parser.OFPActionOutput(Out_Port)]
match_1 = parser.OFPMatch(in_port=In_Port, eth_type=0x0800, ipv4_src=src_ip,
ipv4_dst=dst_ip)
self.add_flow(dp, 1, match_1, actions_1)
path_port = self.net[path[0]][path[1]]['port']
actions = [datapath.ofproto_parser.OFPActionOutput(path_port)]
data = msg.data
pkt = packet.Packet(data)
eth = pkt.get_protocols(ethernet.ethernet)[0]
# change the mac address of packet
eth.src = self.ip_to_mac[src_ip]
eth.dst = self.ip_to_mac[dst_ip]
# self.logger.info(" --- Changing destination mac to %s" % (eth.dst))
pkt.serialize()
out = datapath.ofproto_parser.OFPPacketOut(
datapath=datapath, buffer_id=0xffffffff, in_port=datapath.ofproto.OFPP_CONTROLLER,
actions=actions, data=pkt.data)
datapath.send_msg(out)
@set_ev_cls(event.EventSwitchEnter)
def get_topology_data(self, ev):
switch_list = get_switch(self.topology_api_app, None)
switches = [switch.dp.id for switch in switch_list]
self.net.add_nodes_from(switches)
links_list = get_link(self.topology_api_app, None)
links = [(link.src.dpid, link.dst.dpid, {'port': link.src.port_no}) for link in links_list]
self.net.add_edges_from(links)
links = [(link.dst.dpid, link.src.dpid, {'port': link.dst.port_no}) for link in links_list]
self.net.add_edges_from(links)
# print "**********List of links"
# print self.net.edges()
# for link in links_list:
# print link.dst
# print link.src
# print "Novo link"
# self.no_of_links += 1
# -------------------------------------------------------------------------------------------------------
# CUSTOM CODE
def binary_search(self, dst_ip):
destination_switch_ip = ''
if TRIE == 0:
self.logger.info(" --- IP Lookup with Binary Trie")
binary_dst = BinaryNode.convert_in_bin(dst_ip)
start = default_timer()
destination_switch_ip = self.trie_root.Lookup(binary_dst)
end = default_timer() - start
self.logger.info("Binary trie returned: " + str(destination_switch_ip))
self.logger.info("time elapsed: " + str(end*1000) + "ms")
elif TRIE == 1:
self.logger.info(" --- IP Lookup with Multibit Trie")
binary_dst = MultibitNode.convert_in_bin(dst_ip)
start = default_timer()
destination_switch_ip = self.trie_root.Lookup(binary_dst, "0")
end = default_timer() - start
self.logger.info("Multibit trie returned: " + str(destination_switch_ip))
self.logger.info("time elapsed: " + str(end*1000) + "ms")
elif TRIE == 2:
self.logger.info(" --- IP Lookup with Compressed Trie")
binary_dst = CompressedNode.convert_in_bin(dst_ip)
start = default_timer()
destination_switch_ip = self.trie_root.Lookup(binary_dst)
end = default_timer() - start
self.logger.info("compressed trie returned: " + str(destination_switch_ip))
self.logger.info("time elapsed: " + str(end*1000) + "ms")
if destination_switch_ip != '':
return destination_switch_ip
else:
return "0"
# END OF CUSTOM CODE
def linear_search(self, dst_ip):
self.logger.info(" --- IP address Lookup")
if dst_ip in self.lookup:
destination_switch_IP = self.lookup[dst_ip]
return destination_switch_IP
else:
destination_switch_IP = "0"
return destination_switch_IP
def linear_classification(self, src_ip, dst_ip, proto, sport, dport):
action = "deny"
self.logger.info(" --- Packet classification")
# check matching rule
for rule in sorted(self.classify):
match = self.classify[rule]
if (match[SRC_IP] == src_ip or match[SRC_IP] == "*") and \
(match[DST_IP] == dst_ip or match[DST_IP] == "*") and \
(match[PROTO] == proto or match[PROTO] == "*") and \
(match[SPORT] == sport or match[SPORT] == "*") and \
(match[DPORT] == dport or match[DPORT] == "*"):
self.logger.info(" --- Packet matched rule %s. Action is %s" % (rule, match[ACTION]))
action = match[ACTION]
self.counters[rule] = self.counters[rule] + 1
return action
return action
app_manager.require_app('ryu.app.ws_topology')
app_manager.require_app('ryu.app.ofctl_rest')
app_manager.require_app('ryu.app.gui_topology.gui_topology')