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nf_gen.py
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nf_gen.py
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import os,sys,copy,time,random,struct,socket
from IPy import IP, IPint, parseAddress
import random
from random import random, randint, choice
from struct import pack
from copy import copy, deepcopy
from datetime import datetime
import time
#("!LLLHHIIIIHHBBBBHHBBH")
class PseudoFile(object):
def __init__(self):
pass
def write(self, *args):
pass
def close(self):
pass
def flush(self):
pass
def runTests(tests, sock, addrport, output):
global globalopts
testCount = 0
print addrport
now = datetime.now
for test in tests:
flowCount = 0
tdct, tpairs = test
writeIP = tdct['write_ip']
testByPair = tdct['by_pair']
sleepTime = tdct['sleep']
totalOctets = tdct['octets']
flowPrePack = [777L, 777L, tdct['next_hop'],2,3,0, 777, 0,0, 0, 0,0,0, tdct['protocol'],0,0,0,0,0,0]
headPrePack = [5, 777, 0, time.time(),0,0,0,0,0]
output.write('%s Running test #%s opts %s \n' % (now(), testCount, tdct))
if testByPair:
for pair in tpairs:
sentOctets = 0
breakCond = False
flowCount = 0
flows = ''
inp_src, inp_dst = pair
if inp_src.netmask() != 0xffffffffL:
src_gtr = lambda: randint(inp_src.int(), inp_src.broadcast())
else:
src_gtr = lambda: inp_src.int()
if inp_dst.netmask() != 0xffffffffL:
dst_gtr = lambda: randint(inp_dst.int(), inp_dst.broadcast())
else:
dst_gtr = lambda: inp_dst.int()
header = headPrePack
packetCount = 0
while True:
octets = randint(100, 50000)
if octets + sentOctets >= totalOctets:
octets = totalOctets - sentOctets
breakCond = True
else:
sentOctets += octets
flow = flowPrePack
flow[6] = octets
flow[0] = src_gtr()
flow[1] = dst_gtr()
flow[9] = choice(tdct['src_port'])
flow[10] = choice(tdct['dst_port'])
if writeIP:
output.write('%s %s:%s->%s:%s | %s \n' % (now(), IPint(flow[0]).strNormal(), flow[9], IPint(flow[1]).strNormal(), flow[10], flow[6]))
else:
output.write('%s %X:%s->%X:%s | %s \n' % (now(), flow[0], flow[9], flow[1], flow[10], flow[6]))
flows += pack("!LLLHHIIIIHHBBBBHHBBH", *flow)
flowCount += 1
if flowCount == 32 or breakCond:
header[1] = flowCount
flows = pack("!HHIIIIBBH", *header) + flows
sock.sendto(flows, addrport)
packetCount += 1
flowCount = 0
flows = ''
output.write('%s Packet #%s sent\n' % (now(), packetCount))
time.sleep(sleepTime)
if breakCond: break
output.flush()
else:
flowCount = 0
packetCount = 0
header = headPrePack
sentOctets = 0
breakCond = False
flows = ''
while True:
pair = choice(tpairs)
inp_src, inp_dst = pair
if inp_src.netmask() != 0xffffffffL:
src_gtr = lambda: randint(inp_src.int(), inp_src.broadcast())
else:
src_gtr = lambda: inp_src.int()
if inp_dst.netmask() != 0xffffffffL:
dst_gtr = lambda: randint(inp_dst.int(), inp_dst.broadcast())
else:
dst_gtr = lambda: inp_dst.int()
octets = randint(64, 4096)
if octets + sentOctets >= totalOctets:
octets = totalOctets - sentOctets
breakCond = True
else:
sentOctets += octets
flow = flowPrePack
flow[6] = octets
flow[0] = src_gtr()
flow[1] = dst_gtr()
flow[9] = choice(tdct['src_port'])
flow[10] = choice(tdct['dst_port'])
if writeIP:
output.write('%s %s:%s->%s:%s | %s \n' % (now(), IPint(flow[0]).strNormal(), flow[9], IPint(flow[1]).strNormal(), flow[10], flow[6]))
else:
output.write('%s %X:%s->%X:%s | %s \n' % (now(), flow[0], flow[9], flow[1], flow[10], flow[6]))
flows += pack("!LLLHHIIIIHHBBBBHHBBH", *flow)
flowCount += 1
if flowCount == 63 or breakCond:
header[1] = flowCount
flows = pack("!HHIIIIBBH", *header) + flows
sock.sendto(flows, addrport)
packetCount += 1
flowCount = 0
flows = ''
output.write('%s Packet #%s sent, total sent octets: %s\n' % (now(), packetCount, sentOctets))
output.flush()
time.sleep(sleepTime)
if breakCond: break
testCount += 1
output.flush()
def parseFile(filename):
global globalopts
#nas = 10.10.1.1
tf = open(filename, 'rb')
tlist = []
tdct = {'octets':0,'sleep':0,'by_pair':1, 'write_ip':0, 'next_hop':0L, 'nas':168427777L, 'src_port':[80], 'dst_port':[80], 'protocol':0, 'num':0}
for tline in tf:
if tline.startswith('test|'):
ndct = deepcopy(tdct)
psline = tline[5:].strip().split(' ')
for token in psline:
try:
tkey, tval = token.split(':')
if tkey == 'octets':
if tval[-1] == 'G': tval = int(tval[:-1])*1073741824
elif tval[-1] == 'M': tval = int(tval[:-1])*1048576
elif tval[-1] == 'k': tval = int(tval[:-1])*1024
else: tval = int(tval)
elif tkey == 'next_hop' or tkey == 'nas':
tval = parseAddress(tval)[0]
elif tkey == 'src_port' or tkey == 'dst_port':
tval = [int(sint) for sint in tval[1:-1].split(',')]
elif tkey == 'sleep':
tval = float(tval)
elif tkey == 'time':
globalopts[tkey] = tval
continue
else:
tval = int(tval)
ndct[tkey] = tval
except Exception, ex:
print 'test line tokens parsing exception %s || %s\n' % (token,repr(ex))
tlist.append([ndct, []])
else:
try:
src_ip, dst_ip = tline.strip().split('->')
tlist[-1][1].append((IPint(src_ip), IPint(dst_ip)))
except Exception, ex:
print 'ip line parsing exception %s || %s \n' (tline, repr(ex))
tf.close()
return tlist
if __name__=='__main__':
#binary strings lengthes
globalopts = {'time':'stopped'}
tests_ = parseFile(sys.argv[1])
sock_ = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
sock_.settimeout(10)
host, port = sys.argv[2].split(':')
addrport_ = (host, int(port))
if len(sys.argv) > 3:
output_ = open(sys.argv[3], 'wb')
else:
output_ = PseudoFile()
runTests(tests_, sock_, addrport_, output_)
sock_.close()
output_.close()