[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Sipping] [Technical Errata Reported] RFC4235 (2861)

The following errata report has been submitted for RFC4235,
"An INVITE-Initiated Dialog Event Package for the Session Initiation Protocol (SIP)".

You may review the report below and at:

Type: Technical
Reported by: Martin Thomson <martin.thomson@xxxxxxxxxxxxx>

Section: 4.4

Original Text
  <xs:element name="state">
        <xs:extension base="xs:string">

Corrected Text
  <xs:element name="state">
        <xs:extension base="tns:dialog-state">

  <xs:simpleType name="dialog-state">
    <xs:restriction base="xs:string">
      <xs:enumeration value="trying"/>
      <xs:enumeration value="proceeding"/>
      <xs:enumeration value="early"/>
      <xs:enumeration value="confirmed"/>
      <xs:enumeration value="terminated"/>

The RFC is rather coy about defining the exact syntax for the state element.  The schema permits any content.  It's fairly clear from the description in Section 3.7.1 what the permitted values are, but the case of the values is never explicitly stated.  The text and diagram use title case consistently, and all the examples use lower case exclusively.

This is bad for interoperability.  In practice, this is probably moot, since most implementations will use the lowercase form.  Arguably, it would be valid to produce a value of "Early".  An implementation seeking maximum interoperability would have to use case insensitive comparison to avoid a misinterpretation of the value.

This errata is currently posted as "Reported". If necessary, please
use "Reply All" to discuss whether it should be verified or
rejected. When a decision is reached, the verifying party (IESG)
can log in to change the status and edit the report, if necessary. 

RFC4235 (draft-ietf-sipping-dialog-package-06)
Title               : An INVITE-Initiated Dialog Event Package for the Session Initiation Protocol (SIP)
Publication Date    : November 2005
Author(s)           : J. Rosenberg, H. Schulzrinne, R. Mahy, Ed.
Category            : PROPOSED STANDARD
Source              : Session Initiation Proposal Investigation
Area                : Real-time Applications and Infrastructure
Stream              : IETF
Verifying Party     : IESG
Sipping mailing list  https://www.ietf.org/mailman/listinfo/sipping
This list is for NEW development of the application of SIP
Use sip-implementors@xxxxxxxxxxxxxxx for questions on current sip
Use sip@xxxxxxxx for new developments of core SIP

[IETF Announce]     [IETF Discussion]     [Linux SCSI]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Photo]     [Yosemite News]    [Yosemite Photos]    [Free Online Dating]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Big List of Linux Books]

Add to Google Powered by Linux