To:
"Liu, Hong" <Hong.Liu@neustar.biz>
cc:
"'ietf-provreg@cafax.se'" <ietf-provreg@cafax.se>, brunner@nic-naa.net
From:
Eric Brunner-Williams in Portland Maine <brunner@nic-naa.net>
Date:
Sat, 29 Jun 2002 13:45:30 -0400
In-Reply-To:
Your message of "Sat, 29 Jun 2002 10:31:49 CDT." <5E42C1C85C5D064A947CF92FADE6D82E083FFF@STNTEXCH1>
Sender:
owner-ietf-provreg@cafax.se
Subject:
Re: TCP Mapping
Hong,
State-transition occurs in the registry,
the "server" initiates an event,
either
o enqueueing a message for delivery via a registrar-initiated
instance of communication (which might have session semantics,
and which might be via tcp transport),
or
o enqueueing a message for delivery via a registry-initiated
instance of communication (which might have session semantics,
and which might be via tcp transport).
The first mechanism has found expression in the core drafts, the second
has not.
The proposal to put directionality (the initiator (the event)) into an
application PDU (your private pun on a header bit) puts directionality
discovery in the application.
Just to be sure I got your proposal, is this what you have in mind?
I've given lines that have changes "wedgies".
(from draft-ietf-provreg-epp-tcp-04.txt)
4. Datagram Format
The data field of a TCP datagram MUST contain an EPP datagram. The
EPP datagram contains two fields: a 32-bit header that describes
> the P-bit (is the message "PUSH" or "PULL")
> and
> the 31 bits indicating the total length of the datagram,
and the EPP XML instance.
EPP Datagram Format (one tick mark represents one bit position):
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> |P Total Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| EPP XML Instance |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> Push Bit (1 bit): When set, the message was not initiated by the
> initiator of the connection.
> Total Length (31 bits): The total length of the EPP datagram measured
in octets. The octets contained in this field MUST be included in the
total length calculation.
(end of excerpt from -04)
Is the octet in network byte order? Which bit is the P-bit?
Eric