mirror of
https://github.com/optim-enterprises-bv/nDPId-2.git
synced 2025-10-30 17:57:52 +00:00
362 lines
18 KiB
Python
Executable File
362 lines
18 KiB
Python
Executable File
#!/usr/bin/env python3
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import base64
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import os
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import sys
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sys.path.append(os.path.dirname(sys.argv[0]) + '/../../dependencies')
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sys.path.append(os.path.dirname(sys.argv[0]) + '/../share/nDPId')
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sys.path.append(os.path.dirname(sys.argv[0]))
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sys.path.append(sys.base_prefix + '/share/nDPId')
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import nDPIsrvd
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from nDPIsrvd import nDPIsrvdSocket, TermColor
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class Stats:
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KEYS = [ ['init','reconnect','shutdown','status' ], \
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[ 'new','end','idle','update', ],
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[ 'analyse' ], \
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[ 'guessed','detected','detection-update','not-detected' ], \
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[ 'packet', 'packet-flow'] ]
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ALL_KEYS = KEYS[0] + KEYS[1] + KEYS[2] + KEYS[3] + KEYS[4]
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def __init__(self, nDPIsrvd_sock):
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self.nsock = nDPIsrvd_sock
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self.event_counter = dict()
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self.resetEventCounter()
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self.lines_processed = 0
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self.print_dot_every = 10
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self.print_nmb_every = self.print_dot_every * 5
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def resetEventCounter(self):
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for k in Stats.ALL_KEYS:
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self.event_counter[k] = 0
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def incrementEventCounter(self, json_dict):
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try:
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if 'daemon_event_name' in json_dict:
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self.event_counter[json_dict['daemon_event_name']] += 1
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if 'flow_event_name' in json_dict:
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self.event_counter[json_dict['flow_event_name']] += 1
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if 'packet_event_name' in json_dict:
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self.event_counter[json_dict['packet_event_name']] += 1
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except KeyError as e:
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raise RuntimeError('Semantic validation failed for event counter '
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'which received an invalid key: {}'.format(str(e)))
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def verifyEventCounter(self):
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if self.event_counter['shutdown'] != self.event_counter['init'] or self.event_counter['init'] == 0:
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return False
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if self.event_counter['new'] != self.event_counter['end'] + self.event_counter['idle']:
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return False
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if self.event_counter['new'] < self.event_counter['detected'] + self.event_counter['not-detected']:
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return False
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if self.event_counter['new'] < self.event_counter['guessed'] + self.event_counter['not-detected']:
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return False
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return True
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def getEventCounterStr(self):
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retval = str()
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retval += '-' * 98 + '--\n'
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for klist in Stats.KEYS:
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for k in klist:
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retval += '| {:<16}: {:<4} '.format(k, self.event_counter[k])
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retval += '\n--' + '-' * 98 + '\n'
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return retval
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class SemanticValidationException(Exception):
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def __init__(self, current_flow, text):
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self.text = text
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self.current_flow = current_flow
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def __str__(self):
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if self.current_flow is None:
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return '{}'.format(self.text)
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else:
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return 'Flow ID {}: {}'.format(self.current_flow.flow_id, self.text)
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def verifyFlows(nsock, instance):
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invalid_flows = nsock.verify()
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if len(invalid_flows) > 0:
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invalid_flows_str = ''
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for flow_id in invalid_flows:
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flow = instance.flows[flow_id]
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try:
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l4_proto = flow.l4_proto
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except AttributeError:
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l4_proto = 'n/a'
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invalid_flows_str += '{} proto[{},{}] ts[{} + {} < {}] diff[{}], '.format(flow_id, l4_proto, flow.flow_idle_time,
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flow.flow_last_seen, flow.flow_idle_time,
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instance.most_recent_flow_time,
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instance.most_recent_flow_time -
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(flow.flow_last_seen + flow.flow_idle_time))
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raise SemanticValidationException(None, 'Flow Manager verification failed for: {}'.format(invalid_flows_str[:-2]))
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def onFlowCleanup(instance, current_flow, global_user_data):
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if type(instance) is not nDPIsrvd.Instance:
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raise SemanticValidationException(current_flow,
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'instance is not of type nDPIsrvd.Instance: ' \
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'{}'.format(type(instance)))
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if type(current_flow) is not nDPIsrvd.Flow:
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raise SemanticValidationException(current_flow,
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'current_flow is not of type nDPIsrvd.Flow: ' \
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'{}'.format(type(current_flow)))
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if type(global_user_data) is not tuple:
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raise SemanticValidationException(current_flow,
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'global_user_data is not of type tuple: ' \
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'{}'.format(type(global_user_data)))
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if current_flow.cleanup_reason == nDPIsrvd.FlowManager.CLEANUP_REASON_INVALID:
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raise SemanticValidationException(current_flow,
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'Invalid flow cleanup reason')
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if current_flow.cleanup_reason == nDPIsrvd.FlowManager.CLEANUP_REASON_FLOW_TIMEOUT:
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raise SemanticValidationException(current_flow,
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'Unexpected flow cleanup reason: CLEANUP_REASON_FLOW_TIMEOUT')
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try:
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l4_proto = current_flow.l4_proto
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except AttributeError:
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l4_proto = 'n/a'
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verifyFlows(stats.nsock, instance)
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return True
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def onJsonLineRecvd(json_dict, instance, current_flow, global_user_data):
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_, stats = global_user_data
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stats.incrementEventCounter(json_dict)
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verifyFlows(stats.nsock, instance)
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if type(instance) is not nDPIsrvd.Instance:
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raise SemanticValidationException(current_flow,
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'instance is not of type nDPIsrvd.Instance: ' \
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'{}'.format(type(instance)))
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if type(current_flow) is not nDPIsrvd.Flow and current_flow is not None:
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raise SemanticValidationException(current_flow,
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'current_flow is not of type nDPIsrvd.Flow: ' \
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'{}'.format(type(current_flow)))
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if type(global_user_data) is not tuple:
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raise SemanticValidationException(current_flow,
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'global_user_data is not of type tuple: ' \
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'{}'.format(type(global_user_data)))
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if type(stats) is not Stats:
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raise SemanticValidationException(current_flow,
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'stats is not of type Stats: ' \
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'{}'.format(type(stats)))
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td = instance.getThreadDataFromJSON(json_dict)
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for event_name in ['error_event_name', 'daemon_event_name',
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'packet_event_name', 'flow_event_name']:
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if event_name in json_dict and json_dict[event_name].lower() == 'invalid':
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raise SemanticValidationException(current_flow,
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'Received an invalid event for {}'.format(event_name))
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if td is not None:
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lowest_possible_flow_id = getattr(td, 'lowest_possible_flow_id', 0)
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lowest_possible_packet_id = getattr(td, 'lowest_possible_packet_id', 0)
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else:
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lowest_possible_flow_id = 0
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lowest_possible_packet_id = 0
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if current_flow is not None:
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if instance.flows[current_flow.flow_id] != current_flow:
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raise SemanticValidationException(current_flow,
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'FlowManager flow reference != current flow reference: ' \
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'{} != {}'.format(instance.flows[current_flow.flow_id], current_flow))
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if 'l4_proto' in json_dict:
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try:
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l4_proto = current_flow.l4_proto
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except AttributeError:
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l4_proto = current_flow.l4_proto = json_dict['l4_proto']
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if l4_proto != json_dict['l4_proto']:
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raise SemanticValidationException(current_flow, 'Layer4 protocol mismatch: {} != {}'.format(l4_proto, json_dict['l4_proto']))
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elif json_dict['packet_event_name'] != 'packet-flow':
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raise SemanticValidationException(current_flow, 'Layer4 protocol not found in JSON')
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flow_last_seen = None
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if 'flow_src_last_pkt_time' in json_dict or 'flow_dst_last_pkt_time' in json_dict:
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flow_last_seen = max(json_dict['flow_src_last_pkt_time'], json_dict['flow_dst_last_pkt_time'])
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if flow_last_seen != current_flow.flow_last_seen:
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raise SemanticValidationException(current_flow, 'Flow last seen: {} != {}'.format(flow_last_seen,
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current_flow.flow_last_seen))
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if 'flow_idle_time' in json_dict:
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if json_dict['flow_idle_time'] != current_flow.flow_idle_time:
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raise SemanticValidationException(current_flow, 'Flow idle time mismatch: {} != {}'.format(json_dict['flow_idle_time'],
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current_flow.flow_idle_time))
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if (flow_last_seen is not None and 'flow_idle_time' not in json_dict) or \
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(flow_last_seen is None and 'flow_idle_time' in json_dict):
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raise SemanticValidationException(current_flow,
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'Got a JSON message with only 2 of 3 keys, ' \
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'required for timeout handling: flow_idle_time')
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if 'thread_ts_usec' in json_dict:
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current_flow.thread_ts_usec = int(json_dict['thread_ts_usec'])
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if 'flow_packet_id' in json_dict:
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try:
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if json_dict['flow_packet_id'] != current_flow.flow_packet_id + 1:
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raise SemanticValidationException(current_flow,
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'Invalid flow_packet_id seen, expected {}, got ' \
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'{}'.format(current_flow.flow_packet_id + 1, json_dict['flow_packet_id']))
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else:
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current_flow.flow_packet_id += 1
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except AttributeError:
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pass
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try:
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if current_flow.flow_ended == True:
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raise SemanticValidationException(current_flow,
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'Received JSON message for a flow that already ended/idled.')
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except AttributeError:
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pass
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if 'packet_event_name' in json_dict:
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base64.b64decode(json_dict['pkt'], validate=True)
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if json_dict['packet_event_name'] == 'packet-flow':
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if lowest_possible_packet_id > json_dict['packet_id']:
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raise SemanticValidationException(current_flow,
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'Invalid packet id for thread {} received: ' \
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'expected packet id lesser or equal {}, ' \
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'got {}'.format(json_dict['thread_id'],
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lowest_possible_packet_id,
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json_dict['packet_id']))
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if td is not None:
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td.lowest_possible_packet_id = lowest_possible_packet_id
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if 'flow_id' in json_dict:
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if current_flow.flow_id != json_dict['flow_id']:
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raise SemanticValidationException(current_flow,
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'Current flow id != JSON dictionary flow id: ' \
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'{} != {}'.format(current_flow.flow_id, json_dict['flow_id']))
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if 'flow_event_name' in json_dict:
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try:
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if current_flow.flow_detection_finished == True and \
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(json_dict['flow_event_name'] == 'detected' or \
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json_dict['flow_event_name'] == 'guessed'):
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raise SemanticValidationException(current_flow,
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'Received another detected/guessed event after '
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'a flow was already detected')
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if current_flow.flow_detected == True and \
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json_dict['flow_state'] == 'finished' and \
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json_dict['ndpi']['proto'] == 'Unknown' and \
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json_dict['ndpi']['category'] == 'Unknown':
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raise SemanticValidationException(current_flow,
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'Flow detection successfully finished, but '
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'flow update indiciates an unknown flow.')
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except AttributeError:
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pass
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try:
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if json_dict['flow_state'] == 'finished':
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current_flow.flow_finished = True
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if current_flow.flow_finished == True and \
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json_dict['flow_event_name'] != 'analyse' and \
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json_dict['flow_event_name'] != 'update' and \
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json_dict['flow_event_name'] != 'idle' and \
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json_dict['flow_event_name'] != 'end':
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raise SemanticValidationException(current_flow,
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'Flow detection finished, but received another '
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'{} event'.format(json_dict['flow_event_name']))
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except AttributeError:
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pass
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try:
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if json_dict['flow_first_seen'] > current_flow.thread_ts_usec or \
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flow_last_seen > current_flow.thread_ts_usec or \
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json_dict['flow_first_seen'] > flow_last_seen:
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raise SemanticValidationException(current_flow,
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'Last packet timestamp is invalid: ' \
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'first_seen({}) <= {} >= last_seen({})'.format(json_dict['flow_first_seen'],
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current_flow.thread_ts_usec,
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flow_last_seen))
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except AttributeError:
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if json_dict['flow_event_name'] == 'new':
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pass
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if json_dict['flow_event_name'] == 'end' or \
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json_dict['flow_event_name'] == 'idle':
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current_flow.flow_ended = True
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elif json_dict['flow_event_name'] == 'new':
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if lowest_possible_flow_id > current_flow.flow_id:
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raise SemanticValidationException(current_flow,
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'JSON dictionary lowest flow id for new flow > current flow id: ' \
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'{} != {}'.format(lowest_possible_flow_id, current_flow.flow_id))
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try:
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if current_flow.flow_new_seen == True:
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raise SemanticValidationException(current_flow,
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'Received flow new event twice.')
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except AttributeError:
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pass
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current_flow.flow_new_seen = True
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current_flow.flow_packet_id = 0
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if lowest_possible_flow_id == 0 and td is not None:
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td.lowest_possible_flow_id = current_flow.flow_id
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elif json_dict['flow_event_name'] == 'detected' or \
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json_dict['flow_event_name'] == 'not-detected':
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try:
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if current_flow.flow_detection_finished is True:
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raise SemanticValidationException(current_flow,
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'Flow detection already finished, but detected/not-detected event received.')
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except AttributeError:
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pass
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current_flow.flow_detection_finished = True
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current_flow.flow_detected = True if json_dict['flow_event_name'] == 'detected' else False
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try:
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if current_flow.flow_new_seen is True and lowest_possible_flow_id > current_flow.flow_id:
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raise SemanticValidationException(current_flow, 'Lowest flow id for flow > current flow id: ' \
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'{} > {}'.format(lowest_possible_flow_id, current_flow.flow_id))
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except AttributeError:
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pass
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stats.lines_processed += 1
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if stats.lines_processed % stats.print_dot_every == 0:
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sys.stdout.write('.')
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sys.stdout.flush()
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print_nmb_every = stats.print_nmb_every + (len(str(stats.lines_processed)) * stats.print_dot_every)
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if stats.lines_processed % print_nmb_every == 0:
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sys.stdout.write(str(stats.lines_processed))
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sys.stdout.flush()
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return True
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if __name__ == '__main__':
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argparser = nDPIsrvd.defaultArgumentParser()
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argparser.add_argument('--strict', action='store_true', default=False, help='Require and validate a full nDPId application lifecycle.')
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args = argparser.parse_args()
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address = nDPIsrvd.validateAddress(args)
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sys.stderr.write('Recv buffer size: {}\n'.format(nDPIsrvd.NETWORK_BUFFER_MAX_SIZE))
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sys.stderr.write('Connecting to {} ..\n'.format(address[0]+':'+str(address[1]) if type(address) is tuple else address))
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nsock = nDPIsrvdSocket()
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nsock.connect(address)
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stats = Stats(nsock)
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try:
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nsock.loop(onJsonLineRecvd, onFlowCleanup, (args.strict, stats))
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except nDPIsrvd.SocketConnectionBroken as err:
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sys.stderr.write('\n{}\n'.format(err))
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except KeyboardInterrupt:
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print()
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except Exception as e:
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for failed_line in nsock.failed_lines:
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sys.stderr.write('Affected JSON line: {}\n'.format(failed_line[0]))
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raise(e)
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sys.stderr.write('\nEvent counter:\n' + stats.getEventCounterStr() + '\n')
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if args.strict is True:
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if stats.verifyEventCounter() is False:
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sys.stderr.write('Event counter verification failed. (`--strict\')\n')
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sys.exit(1)
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