-
Notifications
You must be signed in to change notification settings - Fork 0
/
sar_application_binary_trie.py
507 lines (449 loc) · 20.1 KB
/
sar_application_binary_trie.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
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
import ipaddress# For removing the dots in the IP Address
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
# Packet Classification parameters
SRC_IP = 0
DST_IP = 1
PROTO = 2
SPORT = 3
DPORT = 4
ACTION = 5
# IP lookup parameters
IP = 0
SUBNET = 1
DPID = 2
# Topologies
TOPO = 2
########Class for creating the binary trie################
class Trie:
def __init__(self, color, label):
self.left = None #At the start of the trie we do not have nodes in the right or in the left
self.right = None
self.father = None
self.destination_switch_IP = '0'#switch associated with the prefix
self.color = color #Used to indicate if the node is gray or white
self.label = label #the label corresponding to the prefix label
# Insert one ip prefix
def insert(self, prefix):
node=self
#print(prefix)
for i in prefix[0]:#for each bit in the prefix
if i == '0':
if node.left is None:#if there is no node in the left create one
node.left = Trie('white', None)#initialize as a white node
node.left.father = node#for the created node, the father node is the courrent one
node = node.left
else:
node = node.left#if there already exists a node, point to it
elif i == '1':
if node.right is None:#if there is no node in the right create one
node.right = Trie('white', None)
node.right.father = node
node = node.right
else:
node = node.right#if there already exists a node, point to it
node.color = 'gray'#when the prefis ends, the current node is a gray one
node.label = prefix[1]#this node saves the label of the prefix
node.destination_switch_IP = prefix[2]#this node saves the correspondent IP of the prefix
# lookup function
def lookupsearch(self, lookup):
node = self#Start pointing at the first node
for i in lookup:#For each bit in the ip direction to be searched
if node.right or node.left:#We assure that there is a node under the current node
if i == '1' and node.right:#In case the bit of the ip direction is 1 and there is a node at the right we can continue
node = node.right
elif i == '0' and node.left:#In case the bit of the ip direction is 0 and there is a node at the left we can continue
node = node.left
else:
break
else:
break
##### Backtracking #####
while node.color != 'gray':#We start in the final node and start pointing to the father of the nodes until find the las gray node, corresponding to a prefix
node = node.father
#print (node.destination_switch_IP)
return node.destination_switch_IP#Return the Ip direction correspondent to the node of the found longest prefix
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
# 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"
##############################GENERATION OF THE TRIE###################################################################
tableprefix = []
label = 1
for i in self.switch:
############zero padding for 32 bit#############
binIP = str((bin(int(ipaddress.IPv4Address(unicode(i))))))[2:] # unicode for the IPv4 Address formatting
length_binIP = len(binIP)
fullBinary = int((32 - length_binIP)) * str(0) + binIP
############cutting the prefix with the netmask##############
prefix = [fullBinary[:int(self.switch[i][SUBNET])], label, self.switch[i][IP]]
tableprefix.append(prefix)
#####Put in Order the table Prefix and add a label######
for i in range(0, len(tableprefix) - 1):
for j in range(i, len(tableprefix)):
if tableprefix[i][0].__len__() > tableprefix[j][0].__len__():
temp = tableprefix[i]
tableprefix[i] = tableprefix[j]
tableprefix[j] = temp
tableprefix[i][1] = label
label += 1
tableprefix[i + 1][1] = label
############CREATE THE TRIE#################################################
self.trie = Trie('gray', '0')
for i in tableprefix:
self.trie.insert(i)
#######################################################################################################################
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.binary_trie_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
#-------------------------------------------------------------------------------------------------------
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
####################Binary LOOKUP######################################################################################
def binary_trie_search(self, dst_ip):
self.logger.info(" --- Binary Search")
self.logger.info("Destination IP: %s", dst_ip)
############zero padding for 32 bit#############
bin_dst_ip = str((bin(int(ipaddress.IPv4Address(unicode(dst_ip))))))[2:]
length_bin_dst_ip = len(bin_dst_ip)
ipsearch = int((32 - length_bin_dst_ip)) * str(0) + bin_dst_ip
################################################
NextHop = self.trie.lookupsearch(ipsearch)
self.logger.info("Next Hop Returned: %s", NextHop)
return NextHop
########################################################################################################################
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')