rsp-no = "NO" SP string
rsp-ok = "OK" SP string
rsp-reserve = "RESERVE" SP string SP string
rsp-delete = "DELETE" SP string
sasl-mech = 1*ATOM-CHAR
; ATOM-CHAR is defined in [ACAP]
string = quoted / literal
; quoted and literal are defined in [ACAP]
tag = 1*ATOM-CHAR
; ATOM-CHAR is defined in [ACAP]
6. MUPDATE URL Scheme
This document defines the a URL scheme for the purposes of
referencing MUPDATE resources, according to the requirements in
[RFC2717]. This includes both MUPDATE servers as a whole, along with
individual mailbox entries on a given MUPDATE server.
There is no MIME type associated with these resources. It is
intended that a URL consumer would either retrieve the MUPDATE record
in question, or simply connect to the MUPDATE server running on the
specified host. Note that the consumer will need to have
authentication credentials for the specified host.
The MUPDATE URL scheme is similar to the IMAP URL scheme [IMAP-URL].
However, it only takes one of two possible forms:
mupdate://<iserver>/
mupdate://<iserver>/<mailbox>
The first form refers to a MUPDATE server as a whole, the second form
indicates both the server and a mailbox to run a FIND against once
authenticated to the server. Note that part of <iserver> may include
username and authentication information along with a hostname and
port.
6.1. MUPDATE URL Scheme Registration Form
URL scheme name: "mupdate"
URL scheme syntax:
This defines the MUPDATE URL Scheme in [ABNF]. Terminals from the
BNF of IMAP URLs [IMAP-URL] are also used.
mupdateurl = "mupdate://" iserver "/" [ enc_mailbox ]
; iserver and enc_mailbox are as defined in [IMAP-URL]
Character encoding considerations:
Identical to those described in [IMAP-URL] for the appropriate
terminals.
Intended Usage:
The form of the URL without an associated mailbox is intended to
designate a MUPDATE server only. If a mailbox name is included in
the URL, then the consumer is expected to execute a FIND command
for that mailbox on the specified server.
Applications and/or protocols which use this URL scheme name:
The protocol described in this document.
Interoperability Considerations:
None.
Security Considerations:
Users of the MUPDATE URL Scheme should review the security
considerations that are discussed in [IMAP-URL]. In particular,
the consequences of including authentication mechanism information
in a URL should be reviewed.
Relevant Publications:
This document and [IMAP-URL].
Author, Change Controller, and Contact for Further Information:
Author of this document.
7. Security Considerations
While no unauthenticated users may make modifications or even perform
searches on the database, it is important to note that this
specification assumes no protections of any type for authenticated
users.
All authenticated users have complete access to the database. For
this reason it is important to ensure that accounts that are making
use of the database are well secured.
A more secure deployment might have all read only access go through a
slave, and only have accounts which need write access use the master.
This has the disadvantage of a marginally longer time for updates to
reach the clients.
The protocol assumes that all authenticated users are cooperating to
maintain atomic operations. Therefore, all new mailboxes SHOULD be
RESERVEd before they are ACTIVATEd, despite the fact that the
protocol does not require this, and it is therefore possible for a
set of participants which do not obey the provided locking to create
an inconsistent database. RESERVEing the mailbox first is not
required to perform an activate because this behavior simplifies
synchronization with the actual location of the mailboxes.
8. IANA Considerations
The IANA has assigned TCP port number 3905 to "mupdate".
The IANA has registered a URL scheme for the MUPDATE protocol, as
defined in section 6.1 of this document.
IANA has registered a GSSAPI service name of "mupdate" for the
MUPDATE protocol in the registry maintained at:
http://www.iana.org/assignments/gssapi-service-names
9. Intellectual Property Rights
The IETF takes no position regarding the validity or scope of any
intellectual property or other rights that might be claimed to
pertain to the implementation or use of the technology described in
this document or the extent to which any license under such rights
might or might not be available; neither does it represent that it
has made any effort to identify any such rights. Information on the
IETF’s procedures with respect to rights in standards-track and
standards-related documentation can be found in BCP-11. Copies of
claims of rights made available for publication and any assurances of
licenses to be made available, or the result of an attempt made to
obtain a general license or permission for the use of such
proprietary rights by implementors or users of this specification can
be obtained from the IETF Secretariat.
The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary
rights which may cover technology that may be required to practice
this standard. Please address the information to the IETF Executive
Director.
10. References
10.1. Normative References
[KEYWORDS] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[IMAP] Crispin, M., "Internet Message Access Protocol - Version
4", RFC 3501, March 2003.
[ABNF] Crocker, D., Ed. and P. Overell, "Augmented BNF for
Syntax Specifications: ABNF", RFC 2234, November 1997.
[MIME] Freed, N. and N. Bornstein, "Multipurpose Internet Mail
Extensions (MIME) Part One: Format of Internet Message
Bodies", RFC 2045, November 1996.
[IMAP-ACL] Myers, J., "IMAP4 ACL extension", RFC 2086, January 1997.
[SASL] Myers, J., "Simple Authentication and Security Layer
(SASL)", RFC 2222, October 1997.
[IMAP-URL] Newman, C., "IMAP URL Scheme", RFC 2192, September 1997.
[ACAP] Newman, C. and J. Myers, "ACAP -- Application
Configuration Access Protocol", RFC 2244, November 1997.
[TLS] Dierks, T. and C. Allen, "The TLS Protocol Version 1.0",
RFC 2246, January 1999.
10.2. Informative References
[POP3] Myers, J. and M. Rose, "Post Office Protocol - Version
3", STD 53, RFC 1939, May 1996.
[RFC2717] Petke, R. and I. King, "Registration Procedures for URL
Scheme Names", BCP 35, RFC 2717, November 1999.
11. Acknowledgments
Lawrence Greenfield and Ken Murchison, for a great deal of input on
both the protocol and the text of the documents.
12. Author’s Address
Robert Siemborski
Carnegie Mellon, Andrew Systems Group
Cyert Hall 207
5000 Forbes Avenue
Pittsburgh, PA 15213
Phone: (412) 268-7456
EMail: rjs3+@andrew.cmu.edu
13. Full Copyright Statement
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