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https://github.com/jokob-sk/NetAlertX.git
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Rename work 🏗
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jokob-sk
226
server/networkscan.py
Executable file
226
server/networkscan.py
Executable file
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import conf
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from database import insertOnlineHistory
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from device import create_new_devices, print_scan_stats, save_scanned_devices, update_devices_data_from_scan
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from helper import timeNowTZ
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from logger import mylog
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from reporting import skip_repeated_notifications
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#===============================================================================
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# SCAN NETWORK
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#===============================================================================
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def process_scan (db):
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# Load current scan data
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mylog('verbose','[Process Scan] Processing scan results')
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save_scanned_devices (db)
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db.commitDB()
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# Print stats
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mylog('none','[Process Scan] Print Stats')
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print_scan_stats(db)
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mylog('none','[Process Scan] Stats end')
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# Create Events
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mylog('verbose','[Process Scan] Sessions Events (connect / discconnect)')
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insert_events(db)
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# Create New Devices
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# after create events -> avoid 'connection' event
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mylog('verbose','[Process Scan] Creating new devices')
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create_new_devices (db)
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# Update devices info
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mylog('verbose','[Process Scan] Updating Devices Info')
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update_devices_data_from_scan (db)
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# Void false connection - disconnections
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mylog('verbose','[Process Scan] Voiding false (ghost) disconnections')
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void_ghost_disconnections (db)
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# Pair session events (Connection / Disconnection)
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mylog('verbose','[Process Scan] Pairing session events (connection / disconnection) ')
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pair_sessions_events(db)
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# Sessions snapshot
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mylog('verbose','[Process Scan] Creating sessions snapshot')
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create_sessions_snapshot (db)
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# Sessions snapshot
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mylog('verbose','[Process Scan] Inserting scan results into Online_History')
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insertOnlineHistory(db)
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# Skip repeated notifications
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mylog('verbose','[Process Scan] Skipping repeated notifications')
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skip_repeated_notifications (db)
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# Clear current scan as processed
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db.sql.execute ("DELETE FROM CurrentScan")
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# Commit changes
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db.commitDB()
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#-------------------------------------------------------------------------------
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def void_ghost_disconnections (db):
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sql = db.sql #TO-DO
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startTime = timeNowTZ()
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# Void connect ghost events (disconnect event exists in last X min.)
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mylog('debug','[Void Ghost Con] - 1 Connect ghost events')
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sql.execute("""UPDATE Events SET eve_PairEventRowid = Null,
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eve_EventType ='VOIDED - ' || eve_EventType
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WHERE eve_MAC != 'Internet'
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AND eve_EventType = 'Connected'
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AND eve_DateTime = ?
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AND eve_MAC IN (
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SELECT Events.eve_MAC
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FROM CurrentScan, Devices, Events
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WHERE dev_MAC = cur_MAC
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AND eve_MAC = cur_MAC
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AND eve_EventType = 'Disconnected'
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AND eve_DateTime >= DATETIME(?, '-3 minutes')
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) """,
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(startTime, startTime))
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# Void connect paired events
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mylog('debug','[Void Ghost Con] - 2 Paired events')
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sql.execute("""UPDATE Events SET eve_PairEventRowid = Null
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WHERE eve_MAC != 'Internet'
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AND eve_PairEventRowid IN (
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SELECT Events.RowID
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FROM CurrentScan, Devices, Events
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WHERE dev_MAC = cur_MAC
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AND eve_MAC = cur_MAC
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AND eve_EventType = 'Disconnected'
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AND eve_DateTime >= DATETIME(?, '-3 minutes')
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) """,
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(startTime,))
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# Void disconnect ghost events
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mylog('debug','[Void Ghost Con] - 3 Disconnect ghost events')
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sql.execute("""UPDATE Events SET eve_PairEventRowid = Null,
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eve_EventType = 'VOIDED - '|| eve_EventType
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WHERE eve_MAC != 'Internet'
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AND ROWID IN (
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SELECT Events.RowID
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FROM CurrentScan, Devices, Events
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WHERE dev_MAC = cur_MAC
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AND eve_MAC = cur_MAC
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AND eve_EventType = 'Disconnected'
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AND eve_DateTime >= DATETIME(?, '-3 minutes')
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) """,
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(startTime,))
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mylog('debug','[Void Ghost Con] Void Ghost Connections end')
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db.commitDB()
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#-------------------------------------------------------------------------------
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def pair_sessions_events (db):
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sql = db.sql #TO-DO
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# Pair Connection / New Device events
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mylog('debug','[Pair Session] - 1 Connections / New Devices')
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sql.execute ("""UPDATE Events
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SET eve_PairEventRowid =
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(SELECT ROWID
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FROM Events AS EVE2
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WHERE EVE2.eve_EventType IN ('New Device', 'Connected',
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'Device Down', 'Disconnected')
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AND EVE2.eve_MAC = Events.eve_MAC
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AND EVE2.eve_Datetime > Events.eve_DateTime
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ORDER BY EVE2.eve_DateTime ASC LIMIT 1)
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WHERE eve_EventType IN ('New Device', 'Connected')
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AND eve_PairEventRowid IS NULL
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""" )
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# Pair Disconnection / Device Down
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mylog('debug','[Pair Session] - 2 Disconnections')
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sql.execute ("""UPDATE Events
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SET eve_PairEventRowid =
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(SELECT ROWID
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FROM Events AS EVE2
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WHERE EVE2.eve_PairEventRowid = Events.ROWID)
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WHERE eve_EventType IN ('Device Down', 'Disconnected')
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AND eve_PairEventRowid IS NULL
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""" )
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mylog('debug','[Pair Session] Pair session end')
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db.commitDB()
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#-------------------------------------------------------------------------------
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def create_sessions_snapshot (db):
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sql = db.sql #TO-DO
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# Clean sessions snapshot
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mylog('debug','[Sessions Snapshot] - 1 Clean')
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sql.execute ("DELETE FROM SESSIONS" )
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# Insert sessions
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mylog('debug','[Sessions Snapshot] - 2 Insert')
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sql.execute ("""INSERT INTO Sessions
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SELECT * FROM Convert_Events_to_Sessions""" )
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mylog('debug','[Sessions Snapshot] Sessions end')
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db.commitDB()
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#-------------------------------------------------------------------------------
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def insert_events (db):
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sql = db.sql #TO-DO
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startTime = timeNowTZ()
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# Check device down
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mylog('debug','[Events] - 1 - Devices down')
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sql.execute (f"""INSERT INTO Events (eve_MAC, eve_IP, eve_DateTime,
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eve_EventType, eve_AdditionalInfo,
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eve_PendingAlertEmail)
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SELECT dev_MAC, dev_LastIP, '{startTime}', 'Device Down', '', 1
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FROM Devices
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WHERE dev_AlertDeviceDown != 0
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AND dev_PresentLastScan = 1
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AND NOT EXISTS (SELECT 1 FROM CurrentScan
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WHERE dev_MAC = cur_MAC
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) """)
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# Check new connections
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mylog('debug','[Events] - 2 - New Connections')
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sql.execute (f"""INSERT INTO Events (eve_MAC, eve_IP, eve_DateTime,
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eve_EventType, eve_AdditionalInfo,
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eve_PendingAlertEmail)
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SELECT cur_MAC, cur_IP, '{startTime}', 'Connected', '', dev_AlertEvents
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FROM Devices, CurrentScan
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WHERE dev_MAC = cur_MAC
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AND dev_PresentLastScan = 0 """)
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# Check disconnections
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mylog('debug','[Events] - 3 - Disconnections')
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sql.execute (f"""INSERT INTO Events (eve_MAC, eve_IP, eve_DateTime,
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eve_EventType, eve_AdditionalInfo,
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eve_PendingAlertEmail)
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SELECT dev_MAC, dev_LastIP, '{startTime}', 'Disconnected', '',
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dev_AlertEvents
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FROM Devices
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WHERE dev_AlertDeviceDown = 0
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AND dev_PresentLastScan = 1
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AND NOT EXISTS (SELECT 1 FROM CurrentScan
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WHERE dev_MAC = cur_MAC
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) """)
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# Check IP Changed
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mylog('debug','[Events] - 4 - IP Changes')
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sql.execute (f"""INSERT INTO Events (eve_MAC, eve_IP, eve_DateTime,
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eve_EventType, eve_AdditionalInfo,
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eve_PendingAlertEmail)
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SELECT cur_MAC, cur_IP, '{startTime}', 'IP Changed',
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'Previous IP: '|| dev_LastIP, dev_AlertEvents
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FROM Devices, CurrentScan
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WHERE dev_MAC = cur_MAC
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AND dev_LastIP <> cur_IP """ )
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mylog('debug','[Events] - Events end')
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