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import stl_path
import trex_stl_lib
from trex_stl_lib.api import *
from copy import deepcopy
import sys
import tempfile
import md5
#print ls()
from cStringIO import StringIO
import sys
"""
old_stdout = sys.stdout
sys.stdout = mystdout = StringIO()
ls()
sys.stdout = old_stdout
a= mystdout.getvalue()
f = open('scapy_supported_formats.txt','w')
f.write(a)
f.close()
"""
#-------------------------------------------------------TREE IMPLEMENTATION ------------------------
class node(object):
def __init__(self, value):#, children = []):
self.value = value
self.children = []
def __str__(self, level=0):
ret = "\t"*level+repr(self.value)+"\n"
for child in self.children:
ret += child.__str__(level+1)
return ret
#----------------------------------------------------------------------------------------------------
def build_lib():
lib = protocol_struct()
lib = lib.split('\n')
all_protocols=[]
for entry in lib:
entry = entry.split(':')
all_protocols.append(entry[0].strip())
del all_protocols[len(all_protocols)-1]
return all_protocols
def protocol_struct(protocol=''):
if '_' in protocol:
return []
if not protocol=='':
if protocol not in all_protocols:
return 'protocol not supported'
protocol = eval(protocol)
old_stdout = sys.stdout
sys.stdout = mystdout = StringIO()
if not protocol=='':
ls(protocol)
else:
ls()
sys.stdout = old_stdout
a= mystdout.getvalue()
# print a
return a
def parse_description_line(line):
line_arr = [x.strip() for x in re.split(': | = ',line)]
return tuple(line_arr)
def parse_entire_description(d):
d = d.split('\n')
description_list = [parse_description_line(x) for x in d]
del description_list[len(description_list)-1]
return description_list
def get_protocol_details(p_name):
protocol_str = protocol_struct(p_name)
if protocol_str=='protocol not supported':
return 'protocol not supported'
if len(protocol_str) is 0:
return []
tupled_protocol = parse_entire_description(protocol_str)
return tupled_protocol
class scapyRegex:
def __init__(self,FieldName,regex='empty'):
self.FieldName = FieldName
self.regex = regex
def stringRegex(self):
return self.regex
all_protocols = build_lib()
Raw = {'Raw':''}
high_level_protocols = ['Raw']
transport_protocols = {'TCP':Raw,'UDP':Raw}
network_protocols = {'IP':transport_protocols ,'ARP':''}
low_level_protocols = { 'Ether': network_protocols }
regexDB= {'MACField' : scapyRegex('MACField','^([0-9a-fA-F][0-9a-fA-F]:){5}([0-9a-fA-F][0-9a-fA-F])$'),
'IPField' : scapyRegex('IPField','^(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])$')}
def build_nodes(data,dictionary):
n = node(data)
if len(dictionary)==0:
n.children=[]
return n
for obj in dictionary.keys():
if not (obj==''):
x = build_nodes(obj,dictionary[obj])
n.children.append(x)
return n
def build_tree():
root = node('ALL')
root.children = []
root = build_nodes('ALL',low_level_protocols)
return root
protocol_tree = build_tree()
def print_tree(root,level=0):
output = "\t"*level+str(root.value)
print output
if len(root.children)==0:
return
for child in root.children:
print_tree(child,level+1)
def get_all_protocols():
return json.dumps(all_protocols)
def get_tree():
old_stdout = sys.stdout
sys.stdout = mystdout = StringIO()
print_tree(t)
sys.stdout = old_stdout
a= mystdout.getvalue()
return json.dumps(a)
def get_all_db():
db = {}
for pro in all_protocols:
details = get_protocol_details(pro)
db[pro] = json.dumps(details)
return db
def get_all_fields():
fields = []
for pro in all_protocols:
details = get_protocol_details(pro)
for i in range(0,len(details),1):
if len(details[i]) is 3:
fields.append(details[i][1])
uniqeFields = list(set(fields))
fieldDict = {}
for f in uniqeFields:
if f in regexDB:
fieldDict[f] = regexDB[f].stringRegex()
else:
fieldDict[f] = scapyRegex(f).stringRegex()
return fieldDict
class pktResult:
def __init__(self,result,errorCode,errorDesc):
self.result = result
self.errorCode = errorCode
self.errorDesc = errorDesc
def convert2tuple(self):
return tuple([self.result,self.errorCode,self.errorDesc])
# pkt_descriptor in JSON format only!
# returned tuple in JSON format: (pktResultTuple , show2data, hexdump(buffer))
# pktResultTuple is: ( result, errorCode, error description )
def build_pkt(pkt_descriptor):
try:
pkt = eval(json.loads(pkt_descriptor))
old_stdout = sys.stdout
sys.stdout = mystdout = StringIO()
pkt.show2()
sys.stdout = old_stdout
show2data = mystdout.getvalue() #show2 data
bufferData = str(pkt) #pkt buffer
bufferData = bufferData.encode('base64')
pktRes = pktResult('Success',0,'None').convert2tuple()
res = [pktRes,json.dumps(show2data),json.dumps(bufferData)]
JSONres = json.dumps(res)
return JSONres
except:
pktRes = pktResult('Pkt build Failed',str(sys.exc_info()[0]),str(sys.exc_info()[1])).convert2tuple()
res = [pktRes,[],[]]
res = json.dumps(res)
return res
#input: container
#output: md5 in json format encoded in base64
def getMD5(container):
resMD5 = md5.new(json.dumps(container))
resMD5 = json.dumps(resMD5.digest().encode('base64'))
return resMD5
def get_all():
fields=get_all_fields()
db=get_all_db()
fieldMD5 = getMD5(fields)
dbMD5 = getMD5(db)
res = {}
res['db'] = db
res['fields'] = fields
res['DB_md5'] = dbMD5
# print dbMD5
res['fields_md5'] = fieldMD5
return json.dumps(res)
#input in json string encoded base64
def check_update(dbMD5,fieldMD5):
fields=get_all_fields()
db=get_all_db()
currentDBMD5 = json.loads(getMD5(db))
currentFieldMD5 = json.loads(getMD5(fields))
dbMD5_parsed = json.loads(dbMD5)
fieldMD5_parsed = json.loads(fieldMD5)
res = []
# print 'this is current DB MD5: %s ' % currentDBMD5
# print 'this is given DB MD5: %s ' % dbMD5_parsed
if fieldMD5_parsed == currentFieldMD5:
resField = pktResult('Success',0,'None').convert2tuple()
else:
resField = pktResult('Fail',-1,'Field DB is not up to date').convert2tuple()
if dbMD5_parsed == currentDBMD5:
resDB = pktResult('Success',0,'None').convert2tuple()
else:
resDB = pktResult('Fail',-1,'Protocol DB is not up to date').convert2tuple()
return json.dumps([resField,resDB])
#pkt_desc as json
#dictionary of offsets per protocol. tuple for each field: (name, offset, size) at json format
def get_all_pkt_offsets(pkt_desc):
pkt_desc= json.loads(pkt_desc)
try:
pkt_protocols = pkt_desc.split('/')
scapy_pkt = eval(pkt_desc)
total_protocols = len(pkt_protocols)
res = {}
for i in range(total_protocols):
fields = []
for field in scapy_pkt.fields_desc:
size = field.get_size_bytes()
if field.name is 'load':
size = len(scapy_pkt)
fields.append([field.name, field.offset, size])
res[pkt_protocols[i]] = fields
scapy_pkt=scapy_pkt.payload
pktRes = pktResult('Success',0,'None').convert2tuple()
FinalRes = [pktRes,res]
return json.dumps(FinalRes)
except:
pktRes = pktResult('Pkt build Failed',str(sys.exc_info()[0]),str(sys.exc_info()[1])).convert2tuple()
res = [pktRes,{}]
res = json.dumps(res)
return res
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