Hi,

I found that when the length is small than 128, the length of contents
will have just one octet and its value will be this the length itself.
But when the length is greater than 127, the most significative bit of
the first octet will be 1, and the other 7 bits will indicate the
number of the remaining octets of the length of contents fields.
My question now is which of the following sequence of octets
represents a length
of 200?

0x81, 0xC8 or 0x82, 0x00, 0xC8

Thanks,

Andre

sieg1974@yahoo.com (sieg1974) wrote in message news:<897326d0.0311020800.6299c60b@posting.google.com>...
> Hi,
>
> how would be the values of the octets which represent the length of an
> octet string object have when its length is bigger than 255?
>
> Thanks a lot,
>
> Andre

HI,

SNMP messages are encoded using the basic encoding rules (BER).
ASN.1 values are encoded as tag, length, value. The length, if
less tahn 128 can be encoded in one octet. If greater than 127,
then the first octet used to encode the length specifies the
number of octets that follow that specify the length. BER
has no requirement that the length be encoded in the minmum
number of octets. So, a length of 200 could be encoded
as 0x81c8, or as 0x8200c8.

On 2 Nov 2003, sieg1974 wrote:
> Hi,
>
> I found that when the length is small than 128, the length of contents
> will have just one octet and its value will be this the length itself.
> But when the length is greater than 127, the most significative bit of
> the first octet will be 1, and the other 7 bits will indicate the
> number of the remaining octets of the length of contents fields.
> My question now is which of the following sequence of octets
> represents a length
> of 200?
>
> 0x81, 0xC8 or 0x82, 0x00, 0xC8
>
> Thanks,
>
> Andre
>
> sieg1974@yahoo.com (sieg1974) wrote in message news:<897326d0.0311020800.6299c60b@posting.google.com>...
> > Hi,
> >
> > how would be the values of the octets which represent the length of an
> > octet string object have when its length is bigger than 255?
> >
> > Thanks a lot,
> >
> > Andre
Regards,
/david t. perkins