Re: BER encoding of Unsigned32 and BITS

[Kwok Ho Chan <khchan@NortelNetworks.com>]

Chum:
SPPI treats BITS the same way SNMPv2/SMIv2 does, as a pseudotype.
Hence the encoding will be the same.

For:
> DsIfAlgDropCapsEntry ::= SEQUENCE {
>         dsIfAlgDropCapsType                BITS,
>         dsIfAlgDropCapsMQCount             Unsigned32
> }
>
> I want to encode the following:
>
> dsIfAlgDropCapsType/BITS/value = 0011100 (binary)
tag value = 0x04  (same as for OCTET STRING)
length     = 0x01
value       = 0x38  (for binary 0011 100 0, with zero padded at LSBit)

Hope this helped.

We may also need to see if the SPPI needs to be updated on explaining this.

-- Kwok --


At 11:25 AM 9/4/03 +0000, chum chum wrote:
> Hello,
>
> I read the RFC 3084 (COPS-PR) and find in the example of BER encoding for 
> EDP that:
>
> 02 01 08          :ipv4FilterIndex/Unsigned32/Value = 8
>
> However, in the book "Understanding SNMP MIBs", page 396, Unsigned32 has a 
> tag encoding of 0x42, not 0x02. Could someone tell me which one is correct?
>
> How about BER encoding for BITS?
> For example, in RFC 3317 (COPS-PR for DiffServ)
>
> DsIfAlgDropCapsEntry ::= SEQUENCE {
>         dsIfAlgDropCapsType                BITS,
>         dsIfAlgDropCapsMQCount             Unsigned32
> }
>
> I want to encode the following:
>
> dsIfAlgDropCapsType/BITS/value = 0011100 (binary)
> Tag value = ??
> length = ??
> value = ??
>
> Thank you very much,
> C.