I-D ACTION:draft-cmetz-v6ops-v4mapped-api-harmful-00.txt

[[e-mail]]

A New Internet-Draft is available from the on-line Internet-Drafts directories.


	Title		: IPv4-Mapped Address API Considered Harmful
	Author(s)	: C. Metz, J. Hagino
	Filename	: draft-cmetz-v6ops-v4mapped-api-harmful-00.txt
	Pages		: 5
	Date		: 2002-10-30
	
The IPv6 Addressing Architecture [Hinden, 1998] defines the 'IPv4-mapped
IPv6 address.' This representation is used in the IPv6 basic API
[Gilligan, 1999] to denote IPv4 addresses using AF_INET6 sockets.  The
use of IPv4-mapped addresses on AF_INET6 sockets degrades portability,
complicates IPv6 systems, and is likely to create security problems.
This document discusses each issue in turn.  Finally, it proposes to
resolve these problems by recommending deprecation of this mechanism.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-cmetz-v6ops-v4mapped-api-harmful-00.txt

To remove yourself from the IETF Announcement list, send a message to 
ietf-announce-request with the word unsubscribe in the body of the message.

Internet-Drafts are also available by anonymous FTP. Login with the username
"anonymous" and a password of your e-mail address. After logging in,
type "cd internet-drafts" and then
	"get draft-cmetz-v6ops-v4mapped-api-harmful-00.txt".

A list of Internet-Drafts directories can be found in
http://www.ietf.org/shadow.html 
or ftp://ftp.ietf.org/ietf/1shadow-sites.txt


Internet-Drafts can also be obtained by e-mail.

Send a message to:
	[e-mail].
In the body type:
	"FILE /internet-drafts/draft-cmetz-v6ops-v4mapped-api-harmful-00.txt".
	
NOTE:	The mail server at ietf.org can return the document in
	MIME-encoded form by using the "mpack" utility.  To use this
	feature, insert the command "ENCODING mime" before the "FILE"
	command.  To decode the response(s), you will need "munpack" or
	a MIME-compliant mail reader.  Different MIME-compliant mail readers
	exhibit different behavior, especially when dealing with
	"multipart" MIME messages (i.e. documents which have been split
	up into multiple messages), so check your local documentation on
	how to manipulate these messages.
		
		
Below is the data which will enable a MIME compliant mail reader
implementation to automatically retrieve the ASCII version of the
Internet-Draft.

ftp://ftp.ietf.org/internet-drafts/draft-cmetz-v6ops-v4mapped-api-harmful-00.txt"><ftp://ftp.ietf.org/internet-drafts/draft-cmetz-v6ops-v4mapped-api-harmful-00.txt>