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  1. 

  2. #------------------------------------------------------------------------------
    3. 

  3. # $File: ber,v 1.2 2019/04/19 00:42:27 christos Exp $
    4. 

  4. # ber:  file(1) magic for several BER formats used in the mobile
    5. 

  5. # telecommunications industry (Georg Sauthoff)
    6. 

  6. 

  7. # The file formats are standardized by the GSMA (GSM association).
    8. 

  8. # They are specified via ASN.1 schemas and some prose. Basic encoding
    9. 

  9. # rules (BER) is the used encoding. The formats are used for exchanging
    10. 

  10. # call data records (CDRs) between mobile operators and associated
    11. 

  11. # parties for roaming clearing purposes and fraud detection.
    12. 

  12. 

  13. # The magic file covers:
    14. 

  14. 

  15. # - TAP files (TD.57) - CDR batches and notifications
    16. 

  16. # - RAP files (TD.32) - return batches and acknowledgements
    17. 

  17. # - NRT files (TD.35) - CDR batches for 'near real time' processing
    18. 

  18. 

  19. #
    20. 

  20. # TAP 3 Files
    21. 

  21. # TAP -> Transferred Account Procedure
    22. 

  22. # cf. https://www.gsma.com/newsroom/wp-content/uploads/TD.57-v32.31.pdf
    23. 

  23. # TransferBatch short tag
    24. 

  24. 0	byte	0x61
    25. 

  25. # BatchControlInfo short tag
    26. 

  26. >&1	search/b5	\x64
    27. 

  27. # Sender long tag #TAP 3.x (BER encoded)
    28. 

  28. >>&1	search/b8	\x5f\x81\x44
    29. 

  29. # <SpecificationVersionNumber>3</><ReleaseVersionNumber> block
    30. 

  30. >>>&64	search/b64	\x5f\x81\x49\x01\x03\x5f\x81\x3d\x01
    31. 

  31. >>>>&0	byte	x	TAP 3.%d Batch (TD.57, Transferred Account)
    32. 

  32. 

  33. # Notification short tag
    34. 

  34. 0	byte	0x62
    35. 

  35. # Sender long tag
    36. 

  36. >2	search/b8	\x5f\x81\x44
    37. 

  37. # <SpecificationVersionNumber>3</><ReleaseVersionNumber> block
    38. 

  38. >>&64	search/b64	\x5f\x81\x49\x01\x03\x5f\x81\x3d\x01
    39. 

  39. >>>&0	byte	x	TAP 3.%d Notification (TD.57, Transferred Account)
    40. 

  40. 

  41. 

  42. # NRT Files
    43. 

  43. # NRT a.k.a. NRTRDE
    44. 

  44. 0	byte	0x61
    45. 

  45. # <SpecificationVersionNumber>2</><ReleaseVersionNumber> block
    46. 

  46. >&1	search/b8 \x5f\x29\x01\x02\x5f\x25\x01
    47. 

  47. >>&0	byte	x	NRT 2.%d (TD.35, Near Real Time Roaming Data Exchange)
    48. 

  48. 

  49. # RAP Files
    50. 

  50. # cf. https://www.gsma.com/newsroom/wp-content/uploads/TD.32-v6.11.pdf
    51. 

  51. # Long ReturnBatch tag
    52. 

  52. 0	string	\x7f\x84\x16
    53. 

  53. # Long RapBatchControlInfo tag
    54. 

  54. >&1	search/b8	\x7f\x84\x19
    55. 

  55. # <SpecificationVersionNumber>3</><ReleaseVersionNumber> block
    56. 

  56. >>&64	search/b64	\x5f\x81\x49\x01\x03\x5f\x81\x3d\x01
    57. 

  57. # <RapSpecificationVersionNumber>1</><RapReleaseVersionNumber> block
    58. 

  58. >>>&1	string/b	\x5f\x84\x20\x01\x01\x5f\x84\x1f\x01
    59. 

  59. >>>>&0	byte	x	RAP 1.%d Batch (TD.32, Returned Account Procedure),
    60. 

  60. >>>&0	byte	x	TAP 3.%d
    61. 

  61. 

  62. # Long Acknowledgement tag
    63. 

  63. 0	string \x7f\x84\x17
    64. 

  64. # Long Sender tag
    65. 

  65. >&1	search/b5	\x5f\x81\x44	RAP Acknowledgement (TD.32, Returned Account Procedure)
    66.