0000777: leading zeros in IPv6 address text forms

ID	Project	Category	View Status	Date Submitted	Last Update

0000777	1003.1(2013)/Issue7+TC1	System Interfaces	public	2013-10-23 01:33	2019-06-10 08:55

Reporter	nsz	Assigned To
Priority	normal	Severity	Editorial	Type	Clarification Requested
Status	Closed	Resolution	Accepted As Marked

Name	Szabolcs Nagy
Organization	musl libc
User Reference
Section	inet_pton
Page Number	1125
Line Number	37792-37794
Interp Status	---
Final Accepted Text	See 0000777:0002049.


Summary	0000777: leading zeros in IPv6 address text forms
Description	The description of inet_pton about the accepted IPv6 text form says 1. The preferred form is "x:x:x:x:x:x:x:x", where the 'x' s are the hexadecimal values of the eight 16-bit pieces of the address. Leading zeros in individual fields can be omitted, but there shall be at least one numeral in every field. ... the text also refers to RFC 2373 which has a similar description. It only says that at least one hex digit is required in a field, it does not say what the maximum is. Appendix B in RFC 2373 makes it clear that at most four hex digits are allowed, long sequence of leading zeros are not allowed.
Desired Action	the text should make it clear that this is valid address format: 1:02:003:0004:: but this is invalid (according to RFC 2373): 1:0000002:: eg. add that "the hexadecimal number of a field has at most four digits"
Tags	tc2-2008

Don Cragun

2013-12-05 17:22

manager bugnote:0002049

Last edited: 2013-12-05 17:24

We believe the standard already requires this behavior, but agree that it should be spelled out explicitly.

Change:

    The preferred form is "x:x:x:x:x:x:x:x", where the ’x’ s are the hexadecimal values
    of the eight 16-bit pieces of the address. Leading zeros in individual fields can be
    omitted, but there shall be at least one numeral in every field.

on P1125 L37792-37794 to:

    The preferred form is "x:x:x:x:x:x:x:x", where the ’x’ s are the hexadecimal values
    of the eight 16-bit pieces of the address. Leading zeros in individual fields can be
    omitted, but there shall be one to four hexadecimal digits in every field.

Date Modified	Username	Field	Change
2013-10-23 01:33	nsz	New Issue
2013-10-23 01:33	nsz	Name	=> Szabolcs Nagy
2013-10-23 01:33	nsz	Organization	=> musl libc
2013-10-23 01:33	nsz	Section	=> inet_pton
2013-10-23 01:33	nsz	Page Number	=> -
2013-10-23 01:33	nsz	Line Number	=> -
2013-12-05 17:22	Don Cragun	Page Number	- => 1125
2013-12-05 17:22	Don Cragun	Line Number	- => 37792-37794
2013-12-05 17:22	Don Cragun	Interp Status	=> ---
2013-12-05 17:22	Don Cragun	Note Added: 0002049
2013-12-05 17:22	Don Cragun	Status	New => Resolved
2013-12-05 17:22	Don Cragun	Resolution	Open => Accepted As Marked
2013-12-05 17:23	Don Cragun	Final Accepted Text	=> See 0000777:0002049.
2013-12-05 17:23	Don Cragun	Tag Attached: tc2-2008
2013-12-05 17:24	Don Cragun	Note Edited: 0002049
2019-06-10 08:55	agadmin	Status	Resolved => Closed

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