INTERNET-DRAFT M. Yevstifeyev Intended Status: Standards Track April 6, 2011 Updates: 2355, 1738, 1041 (if approved) Expires: October 8, 2011 The 'tn3270' URI Scheme <draft-yevstifeyev-tn3270-uri-18> Abstract This document is the specification of the 'tn3270' Uniform Resource Identifier (URI) scheme, which is used to designate the access to the resources available via Telnet 3270 mode (TN3270) and Telnet 3270 Enchanted mode (TN3270E). It updates RFC 1041 and RFC 2355, which specify these protocols, and RFC 1738, which firstly mentioned this URI scheme without defining its syntax and semantics. Status of this Memo This Internet-Draft is submitted to IETF in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/1id-abstracts.html The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html Copyright and License Notice Copyright (c) 2011 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents M. Yevstifeyev Expires October 8, 2011 [Page 1]
INTERNET DRAFT 'tn3270' URI Scheme April 6, 2011 (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3 2. 'tn3270' URI Definition . . . . . . . . . . . . . . . . . . . . 3 3. Security Considerations . . . . . . . . . . . . . . . . . . . . 3 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 4 5. References . . . . . . . . . . . . . . . . . . . . . . . . . . 4 5.1. Normative References . . . . . . . . . . . . . . . . . . . 4 5.2. Informative References . . . . . . . . . . . . . . . . . . 5 Appendix A. Acknowledgments . . . . . . . . . . . . . . . . . . . 5 Author's Addresses . . . . . . . . . . . . . . . . . . . . . . . . 6 1. Introduction This document specifies the 'tn3270' Uniform Resource Identifier (URI) scheme, which is used to designate the access to the resources available via Telnet 3270 mode (TN3270), as described in RFC 1041 [RFC1041] (especially, see Section 4 of RFC 1041; visit RFC 1576 [RFC1576] for TN3270 practices), and Telnet 3270 Enchanted mode (TN3270E), as described in RFC 2355 [RFC2355]. The 'tn3270' URI scheme was firstly mentioned in RFC 1738 [RFC1738] as used in URIs that designate the access to "Interactive 3270 emulation sessions". Following the creation of the URI scheme registries per RFC 4395 [RFC4395], this scheme was added to the "Provisional URI Schemes" sub-registry in the "Uniform Resource Identifier (URI) Schemes" IANA registry [URIREG]. However RFC 1738 [RFC1738] does not give any definition of syntax and semantics of the 'tn3270' URIs and does not have any guidelines for registration of this scheme. Since there is no acceptable specification of 'tn3270' URI, there is a risk that somebody might try to implement it with some new, possibly undocumented, syntax, just by looking at IANA registry. In order to minimize such risk, this document gives precise definition of syntax, semantics and use of this URIs and registers the corresponding scheme. It also updates RFC 2355 [RFC2355], RFC 1738 M. Yevstifeyev Expires October 8, 2011 [Page 2]
INTERNET DRAFT 'tn3270' URI Scheme April 6, 2011 [RFC1738] and RFC 1041 [RFC1041]. The generic syntax of URIs is described in RFC 3986 [RFC3986]. Registration procedures for new URI schemes are defined in RFC 4395 [RFC4395]. 1.1. Terminology The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [RFC2119]. 2. 'tn3270' URI Definition The 'tn3270' URI is used to access services which are available via Telnet 3270 mode (TN3270), as described in RFC 1041 [RFC1041], and Telnet 3270 Enchanted mode (TN3270E), as described in RFC 2355 [RFC2355]. In fact these protocols are a modified form of Telnet [RFC0854]; see their specifications for details. Note: This document does not specify the TN3270 and TN3270E services themselves, but only the URI scheme for them. There already is the 'telnet' URI scheme [RFC4248], which designates the access to resources available via usual Telnet [RFC0854]. The syntax of 'tn3270' URI is similar to that of 'telnet' one (except the <scheme> part) and takes the form of <tn3270-uri> rule below (given in ABNF, as described in RFC 5234 [RFC5234]): tn3270-uri = "tn3270:" "//" authority ["/"] ;the 'tn3270' URI takes the form ;tn3270://<userinfo>@<host>:<port>/ ;that is formally defined via the <authority> The <authority> rule is specified in RFC 3986 [RFC3986]. If <port> (in the <authority>) is omitted, it SHALL default to 21, as registered in [PORTREG]. The final character "/" MAY be omitted. The <userinfo> (in the <authority>) is assumed to provide information for authentication using RFC 2941 [RFC2941] Telnet Authentication option. 3. Security Considerations Generic security considerations for the usage of URIs are discussed in Section 7 of [RFC3986]. M. Yevstifeyev Expires October 8, 2011 [Page 3]
INTERNET DRAFT 'tn3270' URI Scheme April 6, 2011 Since 'tn3270' URIs provide access to services that are available via TN3270 and TN3270E, which do not add any new security issues to Telnet session, as they are a modified form of it, there are no other security considerations for 'tn3270' URIs not discussed in RFC 4248 [RFC4248] - the 'telnet' URI scheme specification. 4. IANA Considerations IANA is asked to update the registration of the 'tn3270' URI scheme using the following registration template (see [RFC4395]): URI scheme name: tn3270 Status: Permanent URI scheme syntax: see Section 2 of RFC xxxx URI scheme semantics: see Section 2 of RFC xxxx URI scheme encoding considerations: there are no other encoding considerations for 'tn3270' URIs not described in RFC 3986 [RFC3986] Protocols that use the scheme: Telnet 3270 mode (TN3270) [RFC1041] and Telnet 3270 Enchanted Mode (TN3270E) [RFC2355] Security considerations: see Section 3 of RFC xxxx Contact: IESG <iesg@ietf.org> Author/Change controller: IETF <ietf@ietf.org> References: see Section 5 of RFC xxxx [RFC Editor: Replace xxxx with assigned RFC number] 5. References 5.1. Normative References [RFC1041] Rekhter, Y., "Telnet 3270 regime option", RFC 1041, January 1988. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. M. Yevstifeyev Expires October 8, 2011 [Page 4]
INTERNET DRAFT 'tn3270' URI Scheme April 6, 2011 [RFC2355] Kelly, B., "TN3270 Enhancements", RFC 2355, June 1998. [RFC3986] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform Resource Identifier (URI): Generic Syntax", STD 66, RFC 3986, January 2005. [RFC4248] Hoffman, P., "The telnet URI Scheme", RFC 4248, October 2005. [RFC5234] Crocker, D., Ed., and P. Overell, "Augmented BNF for Syntax Specifications: ABNF", STD 68, RFC 5234, January 2008. 5.2. Informative References [PORTREG] Internet Assigned Numbers Authority (IANA) Registry "Port Numbers" <http://www.iana.org/assignments/port-numbers> [RFC0854] Postel, J. and J. Reynolds, "Telnet Protocol Specification", STD 8, RFC 854, May 1983. [RFC1576] Penner, J., "TN3270 Current Practices", RFC 1576, January 1994. [RFC1738] Berners-Lee, T., Masinter, L., and M. McCahill, "Uniform Resource Locators (URL)", RFC 1738, December 1994. Obsoleted by RFC4248, RFC4266. [RFC2941] Ts'o, T., Ed., and J. Altman, "Telnet Authentication Option", RFC 2941, September 2000. [RFC4395] Hansen, T., Hardie, T., and L. Masinter, "Guidelines and Registration Procedures for New URI Schemes", BCP 35, RFC 4395, February 2006. [URIREG] Internet Assigned Numbers Authority (IANA) Regsitry, "Uniform Resource Identifer (URI) Schemes", <http://www.iana.org/assignments/uri-schemes.html> Appendix A. Acknowledgments Many thanks to Alfred Hoenes, Graham Klyne, Alexey Melnikov, Julian Reschke and Peter Saint-Andre for their input to this document. M. Yevstifeyev Expires October 8, 2011 [Page 5]
INTERNET DRAFT 'tn3270' URI Scheme April 6, 2011 Author's Addresses Mykyta Yevstifeyev 8 Kuzovkov St., flat 25, Kotovsk Ukraine EMail: evnikita2@gmail.com M. Yevstifeyev Expires October 8, 2011 [Page 6]
