Extra column + quotation mark in json for pgn 129810 (AIS Class B static data) about canboat

[tkurki]

This value is from real world actisense capture:

$ echo '2014-08-15-10:02:21.634,6,129810,43,255,33,18,ec,4a,b6,0d,24,53,52,54,44,54,22,3a,4f,48,32,36,39,32,40,78,00,28,00,0a,00,6e,00,00,00,00,00,00' | analyzer -json 
INFO 2014-08-17 20:32:10.637 [analyzer] New PGN 129810 for device 43 (heap 7809 bytes)
{"timestamp":"2014-08-15-10:02:21.634","prio":"6","src":"43","dst":"255","pgn":"129810","description":"AIS Class B static data (msg 24 Part B)","fields":{"Message ID":"24","Repeat indicator":"Initial","User ID":"230050540","Type of ship":"Sailing","Vendor ID":"SRTDT":","Callsign":"OH2692","Length":"12.0","Beam":"4.0","Position reference from Starboard":"1.0","Position reference from Bow":"11.0","Mothership User ID":"0","Reserved":"0","Spare":"0"}}
$ echo '2014-08-15-10:02:21.634,6,129810,43,255,33,18,ec,4a,b6,0d,24,53,52,54,44,54,22,3a,4f,48,32,36,39,32,40,78,00,28,00,0a,00,6e,00,00,00,00,00,00' | analyzer -json  | json
INFO 2014-08-17 20:32:14.582 [analyzer] New PGN 129810 for device 43 (heap 7809 bytes)
json: error: input is not JSON: Expected ',' instead of ':' at line 1, column 268:
        {"timestamp":"2014-08-15-10:02:21.634","prio":"6","src":"43","dst":"255","pgn":"129810","description":"AIS Class B static data (msg 24 Part B)","fields":{"Message ID":"24","Repeat indicator":"Initial","User ID":"230050540","Type of ship":"Sailing","Vendor ID":"SRTDT":","Callsign":"OH2692","Length":"12.0","Beam":"4.0","Position reference from Starboard":"1.0","Position reference from Bow":"11.0","Mothership User ID":"0","Reserved":"0","Spare":"0"}}
        ...........................................................................................................................................................................................................................................................................^
{"timestamp":"2014-08-15-10:02:21.634","prio":"6","src":"43","dst":"255","pgn":"129810","description":"AIS Class B static data (msg 24 Part B)","fields":{"Message ID":"24","Repeat indicator":"Initial","User ID":"230050540","Type of ship":"Sailing","Vendor ID":"SRTDT":","Callsign":"OH2692","Length":"12.0","Beam":"4.0","Position reference from Starboard":"1.0","Position reference from Bow":"11.0","Mothership User ID":"0","Reserved":"0","Spare":"0"}}

[keesverruijt]

OK, another case of strange data in some fields not being escaped (or suppressed) properly.

[tkurki]

How about fixing this issue once and for all by properly escaping json value output? Would something like https://github.com/json-c/json-c/blob/master/json_object.c#L100 work? Requires an extra buffer at least.

As witnessed earlier I am no C wizard, but can give it a try later on.