IPv6 Working Group R.E. Gilligan INTERNET-DRAFT: draft-ietf-ipv6-scope-api-00.txt Cache Flow S. Thomson Cisco J. Bound J. McCann Hewlett-Packard W. R. Stevens July 2002 Scoped Address Extensions to the IPv6 Basic Socket API <draft-ietf-ipv6-scope-api-00.txt> Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. This document is a submission by the Internet Protocol IPv6 Working Group of the Internet Engineering Task Force (IETF). Comments should be submitted to the ipng@sunroof.eng.sun.com mailing list. 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/ietf/1id-abstracts.txt The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. Abstract This document specifies a set of extensions to the basic IPv6 sockets API for the support of scoped addresses. draft-ietf-ipv6-scope-api-00.txt Expires January 2003 [Page 1]
INTERNET-DRAFT draft-ietf-ipv6-scope-api-00.txt July 2002 Table of Contents: 1. Introduction.................................................3 2. API Extensions...............................................3 2.1. sin6_scope_id..............................................3 2.2. getaddrinfo()..............................................3 2.3. getnameinfo()..............................................3 3. Summary of New Definitions...................................4 4. Security Considerations......................................4 5. IANA Considerations..........................................4 Acknowledgments.................................................4 References......................................................4 Authors' Addresses..............................................4 draft-ietf-ipv6-scope-api-00.txt Expires January 2003 [Page 2]
INTERNET-DRAFT draft-ietf-ipv6-scope-api-00.txt July 2002 1. Introduction This document specifies a set of extensions to the basic IPv6 sockets API for the support of scoped addresses. The material contained in this document was originally specified in [BASIC-API], causing [SCOPE-ARCH] to be a normative reference for [BASIC-API]. To allow [BASIC-API] to proceed independently of [SCOPE-ARCH], the relevant material was removed from [BASIC-API] and moved to this document. 2. API Extensions 2.1. sin6_scope_id The definition of the sin6_scope_id is extended as follows: - The sin6_scope_id field of the sockaddr_in6 structure contains a zone index [SCOPE-ARCH] as appropriate for the scope of the address carried in the sin6_addr field. For a link scope sin6_addr, sin6_scope_id would contain a link index. For a site scope sin6_addr, sin6_scope_id would contain a site index. The value zero in the sin6_scope_id field represents a default zone. 2.2. getaddrinfo() The definition of the getaddrinfo() function is extended as follows: - If the specified address family is AF_INET6 or AF_UNSPEC, the nodename argument may use the format defined for textual representation of scoped IPv6 addresses [SCOPE-ARCH]. 2.3. getnameinfo() The definition of the getnameinfo() function is extended as follows: - When the numeric form of a node's address is returned, if the sa argument is an IPv6 address, the returned nodename may use the format defined for textual representation of scoped IPv6 addresses [SCOPE-ARCH]. - If the flag bit NI_NUMERICSCOPE is set in the flags argument of getnameinfo(), the numeric form of the scope identifier shall be returned (for example, link index) instead of its name. This flag is ignored if the sa argument is not an IPv6 address. The NI_NUMERICSCOPE flag is defined in <netdb.h>. draft-ietf-ipv6-scope-api-00.txt Expires January 2003 [Page 3]
INTERNET-DRAFT draft-ietf-ipv6-scope-api-00.txt July 2002 3. Summary of New Definitions The following list summarizes the constants, structure, and extern definitions discussed in this memo, sorted by header. <netdb.h> NI_NUMERICSCOPE 4. Security Considerations None. 5. IANA Considerations None. Acknowledgments This document contains material originally specified in [BASIC-API]. The authors of and all contributors to that document are gratefully acknowledged. References [BASIC-API] Gilligan, R., et al. "Basic Socket Interface Extensions for IPv6", Work in Progress [SCOPE-ARCH] Deering, S., et al. "IPv6 Scoped Address Architecture", Work in Progress Authors' Addresses Bob Gilligan Cacheflow, Inc. 650 Almanor Ave. Sunnyvale, CA 94086 Telephone: 408-220-2084 (voice) 408-220-2250 (fax) Email: gilligan@cacheflow.com Susan Thomson Cisco Systems 499 Thornall Street, 8th floor Edison, NJ 08837 Telephone: 732-635-3086 Email: sethomso@cisco.com draft-ietf-ipv6-scope-api-00.txt Expires January 2003 [Page 4]
INTERNET-DRAFT draft-ietf-ipv6-scope-api-00.txt July 2002 Jim Bound Hewlett-Packard Company 110 Spitbrook Road ZKO3-3/W20 Nashua, NH 03062 Telephone: 603-884-0062 Email: Jim.Bound@hp.com Jack McCann Hewlett-Packard Company 110 Spitbrook Road ZKO3-3/W20 Nashua, NH 03062 Telephone: 603-884-2608 Email: Jack.McCann@hp.com draft-ietf-ipv6-scope-api-00.txt Expires January 2003 [Page 5]
