SDP Mail Archive: Re: SDP> Proposal posted

Re: SDP> Proposal posted

Carl Kugler (kugler@us.ibm.com)
Fri, 1 May 1998 16:21:46 -0400

Regarding ftp://ftp.pwg.org/pub/pwg/sdp/sdp-proposal.pdf:

I think a synch BYTE (Start of Packet Byte) is too small to be useful. =
One
could reasonably expect to encounter 0x25 every 256 bytes, on average, =
in a
binary PDL file. Why not a synch WORD or DWORD, say 0x3f2c59d1? You'd=
only
see that randomly every 4 GB or so. The additional 3 bytes would be
insignificant compared to IPP's verbosity.

What does an acknowledgment (ACK) look like? Is there such a thing as =
a NACK?
What happens if a required ACK is not received? Retries?

How many packet length bytes are there? Is there any restriction on pa=
cket
size?

-Carl Kugler
=