| Bug in titan.ProtocolModules.BSSMAP and/or RAW codec? [message #1802832] |
Sun, 17 February 2019 19:27  |
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I'm currently experiencing some strange behavior with the BSSMAP protocol module from git://git.eclipse.org/gitroot/titan/titan.ProtocolModules.BSSMAP_v11.2.0
When I try to parse the octetstring '0004200401098F'O with it, it fails to recognize that the '8F' at the end is actually the optional 'CSFB Indicator' IE of the PDU_BSSMAP_ClearCommand.
This is strange, as I believe the definition of PDU_BSSMAP_ClearCommand including the BSSMAP_IE_CSFB_Indication is actually correct.
However when feeding the above-mentioned octetstring into dec_PDU_BSSAP(), the result is:
{ discriminator := '0'B, spare := '0000000'B, dlci := omit, lengthIndicator := 4, pdu := { bssmap := { clearCommand := { messageType := '20'O (" "), layer3HeaderInfo := omit, cause := { elementIdentifier := '04'O, lengthIndicator := 1, causeValue := '0001001'B, extensionCauseValue := '0'B, spare1 := omit }, cSFB_Indication := omit } } } }
note that cSFB_Indication should not be omit!
Also:
20:07:35.430508 MSC_Tests.ttcn:4543 dec_PDU_BSSAP(): Warning: Data remained at the end of the stream after successful decoding: '8F'O
i.e. the RAW codec somehow doesn't recognize the 8F as CSFB Indication.
Any help is much appreciated. I actually suspect a bug of the RAW codec here?
Thanks in advance
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| Re: Bug in titan.ProtocolModules.BSSMAP and/or RAW codec? [message #1802862 is a reply to message #1802832] |
Mon, 18 February 2019 09:54  |
 Gábor Szalai
Messages: 133
Registered: December 2015 |
Senior Member |
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The length of the layer 3, BSSMAP message ('200401098F'O) is 5 not 4, so the length indicator in the BSSAP part should be '05':
'0005200401098F'O
{ discriminator := '0'B, spare := '0000000'B, dlci := omit, lengthIndicator := 5, pdu := { bssmap := { clearCommand := { messageType := '20'O (" "), layer3HeaderInfo := omit, cause := { elementIdentifier := '04'O, lengthIndicator := 1, causeValue := '0001001'B, extensionCauseValue := '0'B, spare1 := omit }, cSFB_Indication := { elementIdentifier := '8F'O } } } } }
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