def get_flow_ips(self, **args):
path = args['path']
file_name = args['file_name']
# TODO: this handler should read the conn.log and get the flows there
p_read_handler = PcapHandler()
file_path = "/".join([path, file_name])
p_read_handler.open_file(file_path)
p_read_handler.open_pcap()
udp_handler = UDPHandler()
for ts, buf in p_read_handler.get_reader():
udp = udp_handler.read_udp(ts, buf)
if udp:
try:
dns = dpkt.dns.DNS(udp.data)
self.flow_li.append([udp_handler.src_ip, udp_handler.sport, udp_handler.dst_ip, udp_handler.dport, udp_handler.timestamp])
except IndexError:
continue #dpkt is not properly handling
self.dns_li.append(dns)
return self.flow_li
def get_flow_ips(self, **args):
path = args['path']
file_name = args['file_name']
# TODO: this handler should read the conn.log and get the flows there
p_read_handler = PcapHandler()
file_path = "/".join([path, file_name])
p_read_handler.open_file(file_path)
p_read_handler.open_pcap()
udp_handler = UDPHandler()
for ts, buf in p_read_handler.get_reader():
udp = udp_handler.read_udp(ts, buf)
if udp:
try:
dns = dpkt.dns.DNS(udp.data)
self.flow_li.append([
udp_handler.src_ip, udp_handler.sport,
udp_handler.dst_ip, udp_handler.dport,
udp_handler.timestamp
])
except IndexError:
continue #dpkt is not properly handling
self.dns_li.append(dns)
return self.flow_li
def upload(request):
log = Logger("Upload form", "DEBUG")
context = {
'page_title': 'Upload your pcap file here',
'upload_status': False,
'message': request.session.get('message', False)
}
if request.method == "POST":
form = UploadPcapForm(request.POST, request.FILES)
if form.is_valid():
user_id = request.user.id
context['form'] = form
file_handler = FileHandler()
file_handler.create_dir()
mem_file = request.FILES['pcap_file']
log.message("file: %s" % mem_file.name)
file_handler.save_file(mem_file)
context['upload_status'] = True
#save the file name to the db
pcap_name = mem_file.name
upload_path = file_handler.upload_dir
# evey pcap file is saved as a flow container, there may or may not be flows, the pcaps colon will give the flow pcaps
hash_handler = HashHandler()
hash_value = hash_handler.get_hash(os.path.join(upload_path, pcap_name))
request.session['uploaded_hash'] = hash_value
request.session['uploaded_file_name'] = pcap_name
# send the file to the defined protocol handler so that it can detect
protocol_handler = settings.PROTOCOL_HANDLER
package = "ovizart.modules.traffic.detector"
module_name = ".".join([package, protocol_handler])
# from ovizart.modules.traffic.detector.x import handler as imported_module
traffic_detector_module = getattr(__import__(module_name, fromlist=["handler"]), "handler")
traffic_detector_handler = traffic_detector_module.Handler()
traffic_detector_handler.create_reassemble_information(file_handler.file_path, upload_path)
output = traffic_detector_handler.detect_proto(file_handler.file_path, upload_path)
if output == False:
request.session['message'] = "Error occured. Please try again."
return redirect('/pcap/upload')
file_type = get_file_type(file_handler.file_path)
file_size = get_file_size(file_handler.file_path)
flow_file, created = Flow.objects.get_or_create(user_id=user_id, hash_value=hash_value,file_name=pcap_name,
path=upload_path, upload_time=datetime.datetime.now(),
file_type=file_type, file_size=file_size)
if "tcp" in output:
log.message("protocol detected: %s" % "TCP")
# run tcp flow extractor
p_read_handler = PcapHandler()
p_read_handler.open_file(file_handler.file_path)
p_read_handler.open_pcap()
f_handler = FlowHandler(p_read_handler)
flow, direction = f_handler.get_tcp_flows()
p_write_handler = PcapHandler()
files = f_handler.save_flow(flow, p_write_handler, save_path=upload_path)
# save the flow pcap names to the mongo db
pcap_list = map(lambda x: Pcap.objects.create(hash_value=hash_handler.get_hash(os.path.join(upload_path, x)), file_name=x, path=upload_path), files.values()[0])
if flow_file.pcaps:
pre_li = flow_file.pcaps
pre_li.extend(pcap_list)
flow_file.pcaps = pre_li
else:
flow_file.pcaps = pcap_list
flow_file.save()
p_read_handler.close_file()
p_write_handler.close_file()
# now i should hook a protocol detector
# before that i should detect the application level protocol
for f in files.values()[0]:
packets = []
# better to save tcp level information to db here
full_path = os.path.join(upload_path, f)
p_read_handler.open_file(full_path)
p_read_handler.open_pcap()
pcap = p_read_handler.get_pcap()
# the list that will keep the tcp part of the packet
tcp_list = []
for ts, buf in pcap:
tcp_handler = TcpHandler()
tcp = tcp_handler.read_tcp(ts, buf)
# this list will be used at the layers above tcp
if tcp:
tcp_list.append((tcp, tcp_handler.ident))
else: continue
tcp_data = u"."
if tcp_handler.data:
tcp_data = tcp_handler.data
# some requests include hexadecimal info, most probably some binary info that can not be
# converted to the utf8, for now i better remove them, #TODO should handle them, though
# try with 4, tcp.data has binary request
# def get_tcp(n):
# count = 1
# f = file("milliyet.pcap", "rb")
# reader = dpkt.pcap.Reader(f)
# for ts, buf in reader:
# if count == n:
# f.close()
# return buf
# count += 1
data_li = tcp_data.split("\r\n")
tmp = []
for data in data_li:
try:
data.encode("utf-8")
tmp.append(data)
except:
tmp.append("data that can not be encoded to utf-8")
tcp_data = " \n".join(tmp)
packet = PacketDetails.objects.create(ident=tcp_handler.ident, flow_hash=hash_value, timestamp=tcp_handler.timestamp,
length=tcp_handler.length, protocol=tcp_handler.proto,
src_ip=tcp_handler.src_ip,
dst_ip=tcp_handler.dst_ip, sport=tcp_handler.sport,
dport=tcp_handler.dport, data=str(tcp_data))
packets.append(packet)
# get the pcap object
p = Pcap.objects.get(hash_value=hash_handler.get_hash(os.path.join(upload_path, f)))
log.message("pcap for packet update detected: %s" % p)
# update its packets
p.packets = list(packets) # converting a queryset to list
p.save()
p_read_handler.close_file()
if "udp" in output:
log.message("protocol detected: %s" % "UDP")
p_read_handler = PcapHandler()
file_path = os.path.join(upload_path, pcap_name)
p_read_handler.open_file(file_path)
p_read_handler.open_pcap()
udp_handler = UDPHandler()
pcap = Pcap.objects.create(hash_value=hash_handler.get_hash(os.path.join(upload_path, pcap_name)), file_name=pcap_name, path=upload_path)
pcap_list = list([pcap])
if flow_file.pcaps:
pre_li = flow_file.pcaps
pre_li.extend(pcap_list)
flow_file.pcaps = pre_li
else:
flow_file.pcaps = pcap_list
flow_file.save()
packets = []
for ts, buf in p_read_handler.get_reader():
udp = udp_handler.read_udp(ts, buf)
if udp:
udp_data = u"."
if udp_handler.data:
udp_data = udp_handler.data
try:
udp_data = udp_data.encode("utf-8")
except:
udp_data = "data that can not be encoded to utf-8"
packet = PacketDetails.objects.create(ident=udp_handler.ident, flow_hash=hash_value, timestamp=udp_handler.timestamp,
length = udp_handler.length,
protocol=udp_handler.proto, src_ip=udp_handler.src_ip,
dst_ip=udp_handler.dst_ip, sport=udp_handler.sport,
dport=udp_handler.dport, data=str(udp_data))
packets.append(packet)
# get the pcap object
p = Pcap.objects.get(hash_value=hash_handler.get_hash(os.path.join(upload_path, pcap_name)))
# update its packets
p.packets = list(packets) # converting a queryset to list
p.save()
p_read_handler.close_file()
# starting the bro related issues for the reassembled data
output = traffic_detector_handler.detect_appproto(file_handler.file_path, upload_path)
log.message("protocol detected: %s" % output)
if output and "http" in output:
log.message("protocol detected: %s" % "HTTP")
# save the reassembled http session IPs to FlowDetails
# this part is checking the http handler module name and importing the handler
http_protocol_handler = settings.HTTP_HANDLER
package = "ovizart.modules.traffic.parser.tcp"
module_name = ".".join([package, http_protocol_handler])
# from ovizart.modules.traffic.parser.tcp.x import handler as imported_module
http_handler_module = getattr(__import__(module_name, fromlist=["handler"]), "handler")
http_handler = http_handler_module.Handler()
# define a get_flow_ips function for the custom handler if required
# TODO: save the timestamps of the flows
flow_ips = http_handler.get_flow_ips(path=upload_path)
flow_detail_li = []
for detail in flow_ips:
flow_detail, create = FlowDetails.objects.get_or_create(parent_hash_value=request.session['uploaded_hash'], user_id=user_id, src_ip=detail[0], sport=int(detail[1]), dst_ip=detail[2], dport=int(detail[3]), protocol="http", timestamp = detail[4])
flow_detail_li.append(flow_detail)
if flow_file.details:
pre_li = flow_file.details
pre_li.extend(flow_detail_li)
flow_file.details = pre_li
else:
flow_file.details = flow_detail_li
flow_file.save()
# then call functions that will save request and responses that will parse dat files, save the headers and files
#http_handler.save_request(path=upload_path, hash_value=request.session['uploaded_hash'])
#http_handler.save_response(path=upload_path, hash_value=request.session['uploaded_hash'])
http_handler.save_request_response(path=upload_path, hash_value=request.session['uploaded_hash'])
# dns realted issues starts here
if output and "dns" in output:
log.message("protocol detected: %s" % "DNS")
dns_protocol_handler = settings.DNS_HANDLER
package = "ovizart.modules.traffic.parser.udp"
module_name = ".".join([package, dns_protocol_handler])
# from ovizart.modules.traffic.parser.udp.x import handler as imported_module
dns_handler_module = getattr(__import__(module_name, fromlist=["handler"]), "handler")
dns_handler = dns_handler_module.Handler()
# define a get_flow_ips function for the custom handler if required
flow_ips = dns_handler.get_flow_ips(path=upload_path, file_name=request.session['uploaded_file_name'])
flow_detail_li = []
for detail in flow_ips:
flow_detail, create = FlowDetails.objects.get_or_create(parent_hash_value=request.session['uploaded_hash'], user_id=user_id, src_ip=detail[0], sport=int(detail[1]), dst_ip=detail[2], dport=int(detail[3]), protocol="dns", timestamp = detail[4])
flow_detail_li.append(flow_detail)
if flow_file.details:
pre_li = flow_file.details
pre_li.extend(flow_detail_li)
flow_file.details = pre_li
else:
flow_file.details = flow_detail_li
flow_file.save()
dns_handler.save_request_response()
if output and "smtp" in output:
log.message("protocol detected: %s" % "SMTP")
smtp_protocol_handler = settings.SMTP_HANDLER
package = "ovizart.modules.traffic.parser.tcp"
module_name = ".".join([package, smtp_protocol_handler])
# from ovizart.modules.traffic.parser.tcp.x import handler as imported_module
smtp_handler_module = getattr(__import__(module_name, fromlist=["handler"]), "handler")
smtp_handler = smtp_handler_module.Handler()
# define a get_flow_ips function for the custom handler if required
smtp_handler.set_flow(flow_file) # i need this, to get the timestamp from a packet belongs to the flow
flow_ips = smtp_handler.get_flow_ips(path=upload_path, file_name=request.session['uploaded_file_name'])
flow_detail_li = []
for detail in flow_ips:
flow_detail, create = FlowDetails.objects.get_or_create(parent_hash_value=request.session['uploaded_hash'], user_id=user_id, src_ip=detail[0], sport=int(detail[1]), dst_ip=detail[2], dport=int(detail[3]), protocol="smtp", timestamp = detail[4])
flow_detail_li.append(flow_detail)
if flow_file.details:
pre_li = flow_file.details
pre_li.extend(flow_detail_li)
flow_file.details = pre_li
else:
flow_file.details = flow_detail_li
flow_file.save()
smtp_handler.save_request_response(upload_path=upload_path)
else:
log.message("protocol detected: %s" % "Unknown")
unknown_protocol_handler = settings.UNKNOWN_HANDLER
package = "ovizart.modules.traffic.parser"
module_name = ".".join([package, unknown_protocol_handler])
unknown_handler_module = getattr(__import__(module_name, fromlist=["handler"]), "handler")
unknown_handler = unknown_handler_module.Handler()
flow_ips = unknown_handler.get_flow_ips(path=upload_path, file_name=request.session['uploaded_file_name'], parent_hash_value=request.session['uploaded_hash'], user_id=user_id)
flow_detail_li = []
for detail in flow_ips:
flow_detail, create = FlowDetails.objects.get_or_create(parent_hash_value=request.session['uploaded_hash'], user_id=user_id, src_ip=detail[0], sport=int(detail[1]), dst_ip=detail[2], dport=int(detail[3]), protocol="unknown", timestamp = detail[4])
if created:
flow_detail_li.append(flow_detail)
if flow_file.details:
pre_li = flow_file.details
pre_li.extend(flow_detail_li)
flow_file.details = pre_li
else:
flow_file.details = flow_detail_li
flow_file.save()
else:
form = UploadPcapForm()
context['form'] = form
request.session['message'] = False
return render_to_response("pcap/upload.html",
context_instance=RequestContext(request, context))