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RAW coder: length field with offset [message #1769212]

Thu, 27 July 2017 19:56

Harald Welte

Messages: 140
Registered: July 2017
Location: Berlin, Germany

Senior Member

In some protocols, such as 3GPP TS 44.060 there are variable-length fields + a length field. However, the special aspect is that the length field doesn't encode the number of octets within the field, but the mumber of octets - 3, or something like that.

so something like

type Foo {
    uint8_t foo_len,
    octetstring foo
} with {
    variant (foo_len) "LENGTHTO(foo)-3"
};

would be semantically required. I suppose it is not possible to express this with the TITAN RAW codec?

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Re: RAW coder: length field with offset [message #1769369 is a reply to message #1769212]

Mon, 31 July 2017 06:16

Elemer Lelik

Messages: 1120
Registered: January 2015

Senior Member

Hi Harald,

we are looking into this; let me come back to you.

Best regards
Elemer

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Re: RAW coder: length field with offset [message #1772550 is a reply to message #1769369]

Tue, 12 September 2017 09:30

Elemer Lelik

Messages: 1120
Registered: January 2015

Senior Member

Hi Harald,

this has been implemented, see

https://bugs.eclipse.org/bugs/show_bug.cgi?id=522154

BR

Elemer

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Re: RAW coder: length field with offset [message #1772608 is a reply to message #1772550]

Wed, 13 September 2017 04:04

Harald Welte

Messages: 140
Registered: July 2017
Location: Berlin, Germany

Senior Member

Thanks a lot for your excellent support!

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