in RFC 1570 - PPP LCP Extensions,i found type 13(0x0D) stand for callback


there are only 4 operations
Operation

The Operation field is one octet and indicates the contents of the
Message field.

0 location is determined by user authentication

1 Dialing string, the format and contents of which assumes
configuration knowledge of the specific device which is
making the callback.

2 Location identifier, which may or may not be human
readable, to be used together with the authentication
information for a database lookup to determine the
callback location.

3 E.164 number.

4 Distinguished name.

i don't know what does 06 mean.

"enst" дÈëÓʼþ news:c0en4b$ukr$1@mail.cn99.com...
> 0000: FF 03 C0 21 |01 00 00 11 |01 04 05 C8 ,05
> 06 13 7F ÿ
> LCP Configure-Request ID len MRU len 1480 Magic Number
> len
> 0010: 21 1B ,0D 03 06
> ^^^^^^^^????
>
> what does "OD" mean?
> in RFC 1661, i can only find types from 1 to 8.
>
>
>

in RFC 1570 - PPP LCP Extensions,i found type 13(0x0D) stand for callback

0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length | Operation | Message ...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

there are only 4 operations
Operation

The Operation field is one octet and indicates the contents of the
Message field.

0 location is determined by user authentication

1 Dialing string, the format and contents of which assumes
configuration knowledge of the specific device which is
making the callback.

2 Location identifier, which may or may not be human
readable, to be used together with the authentication
information for a database lookup to determine the
callback location.

3 E.164 number.

4 Distinguished name.

i don't know what does 06 mean.

"enst" дÈëÓʼþ news:c0en4b$ukr$1@mail.cn99.com...
> 0000: FF 03 C0 21 |01 00 00 11 |01 04 05 C8 ,05
> 06 13 7F ÿ
> LCP Configure-Request ID len MRU len 1480 Magic Number
> len
> 0010: 21 1B ,0D 03 06
> ^^^^^^^^????
>
> what does "OD" mean?
> in RFC 1661, i can only find types from 1 to 8.
>
>
>

"enst" writes:
> 0000: FF 03 C0 21 |01 00 00 11 |01 04 05 C8 ,05
> 06 13 7F ÿ
> LCP Configure-Request ID len MRU len 1480 Magic Number
> len
> 0010: 21 1B ,0D 03 06
> ^^^^^^^^????
>
> what does "OD" mean?
> in RFC 1661, i can only find types from 1 to 8.

Option 13 is callback (RFC 1570), and Operation value 6 is Microsoft's
proprietary "CBCP" variant.

Instead of looking through the RFCs for option numbers, you should be
looking at the IANA registry first:

http://www.iana.org/assignments/ppp-numbers

If you're interested, I could also recommend a book that describes PPP
in some detail, though I don't think that writing a PPP implementation
from scratch is a good idea.

--
James Carlson, IP Systems Group
Sun Microsystems / 1 Network Drive 71.234W Vox +1 781 442 2084
MS UBUR02-212 / Burlington MA 01803-2757 42.497N Fax +1 781 442 1677