[sip-clf] draft-ietf-sipclf-format-01, TLV Start Pointer
Anders Nygren <anders.nygren@gmail.com> Tue, 15 March 2011 18:01 UTC
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Date: Tue, 15 Mar 2011 12:02:41 -0600
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From: Anders Nygren <anders.nygren@gmail.com>
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Subject: [sip-clf] draft-ietf-sipclf-format-01, TLV Start Pointer
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Hi When extracting the mandatory fields the length of one parameter can normally be calculated by Length = <Pointer To Next Parameter> - <Pointer To This Parameter> -1 However if there are no optional fields "If the OPTIONAL TLV groups are not implemented, then the "TLV Start Pointer" field MUST be set to zero (0x0000)." But to calculate the length of <Client-Txn> You first have to check if <TLV Start Pointer> = 0x0000 in which case the <Client-Txn> length is Length = <Record Length> - <Pointer To Client-Txn> -1 Similarly when extracting the TLVs it is necessary to do an extra test if the <TLV Start Pointer> = 0x0000. I would like to propose that in the case when there are no optional fields that the <TLV Start Pointer> points to the 0x0A at the end of the record. It is not a big complication but it will remove a couple of tests in a parser. /Anders
- [sip-clf] draft-ietf-sipclf-format-01, TLV Start … Anders Nygren
- Re: [sip-clf] draft-ietf-sipclf-format-01, TLV St… Gonzalo Salgueiro
- Re: [sip-clf] draft-ietf-sipclf-format-01, TLV St… Peter Musgrave