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76 lines
2.6 KiB
Python
76 lines
2.6 KiB
Python
#!/usr/bin/python
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# -*- coding: UTF-8 -*-
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"""
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FMS Decoder
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@author: Bastian Schroll
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@requires: Configuration has to be set in the config.ini
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"""
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import logging # Global logger
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import re # Regex for validation
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from includes import globals # Global variables
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from includes import doubleFilter # double alarm filter
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##
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#
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# FMS decoder function
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# validate -> check double alarm -> log
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#
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def decode(freq, decoded):
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"""
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Export FMS Information from Multimon-NG RAW String and call alarmHandler.processAlarm()
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@type freq: string
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@param freq: frequency of the SDR Stick
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@type decoded: string
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@param decoded: RAW Information from Multimon-NG
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@requires: Configuration has to be set in the config.ini
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@return: nothing
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@exception: Exception if FMS decode failed
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"""
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try:
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fms_service = decoded[19] # Organisation
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fms_country = decoded[36] # Bundesland
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fms_location = decoded[65:67] # Ort
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fms_vehicle = decoded[72:76] # Fahrzeug
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fms_status = decoded[84] # Status
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fms_direction = decoded[101] # Richtung
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fms_directionText = decoded[103:110] # Richtung (Text)
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fms_tsi = decoded[114:117] # Taktische Kruzinformation
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if "CRC correct" in decoded: #check CRC is correct
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fms_id = fms_service+fms_country+fms_location+fms_vehicle+fms_status+fms_direction # build FMS id
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# if FMS is valid
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if re.search("[0-9a-f]{8}[0-9a-f]{1}[01]{1}", fms_id):
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# check for double alarm
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if doubleFilter.checkID("FMS", fms_id):
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logging.info("FMS:%s Status:%s Richtung:%s TSI:%s", fms_id[0:8], fms_status, fms_direction, fms_tsi)
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data = {"fms":fms_id[0:8], "status":fms_status, "direction":fms_direction, "directionText":fms_directionText, "tsi":fms_tsi, "description":fms_id[0:8]}
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# If enabled, look up description
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if globals.config.getint("FMS", "idDescribed"):
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from includes import descriptionList
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data["description"] = descriptionList.getDescription("FMS", fms_id[0:8])
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# processing the alarm
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try:
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from includes import alarmHandler
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alarmHandler.processAlarm("FMS", freq, data)
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except:
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logging.error("processing alarm failed")
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logging.debug("processing alarm failed", exc_info=True)
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pass
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# in every time save old data for double alarm
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doubleFilter.newEntry(fms_id)
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else:
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logging.warning("No valid FMS: %s", fms_id)
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else:
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logging.warning("FMS CRC incorrect")
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except:
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logging.error("error while decoding")
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logging.debug("error while decoding", exc_info=True)
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