RFC Errata


Errata Search

 
Source of RFC  
Summary Table Full Records

RFC 4235, "An INVITE-Initiated Dialog Event Package for the Session Initiation Protocol (SIP)", November 2005

Source of RFC: sipping (rai)

Errata ID: 1495
Status: Held for Document Update
Type: Technical

Reported By: Iñaki Baz Castillo
Date Reported: 2008-08-26
Held for Document Update by: Robert Sparks

Section 3.7.1 says:

[...]
non-2xx response for any other reason, all FSMs spawned from that
INVITE transition to the Terminated state with the event "rejected".

--------------

[...]
If the UAS receives a CANCEL
request and then generates a 487 response to the INVITE (which can
occur in the Proceeding and Early states), the FSM transitions to the
Terminated state with the event "cancelled".

It should say:

[...]
non-2xx response for any other reason, all FSMs spawned from that
INVITE transition to the Terminated state with the event "rejected".
During Early state the FSM transitions to the Terminate state if the UAC sends a BYE (corresponding to "local-bye" event).

-------------

[...]
If the UAS receives a CANCEL
request and then generates a 487 response to the INVITE (which can
occur in the Proceeding and Early states), the FSM transitions to the
Terminated state with the event "cancelled".
If the UAS receives a BYE request during the Early state the FSM transitions to the Terminated state with the event "remote-bye".

Notes:

Section 3.7.1 (The Dialog State Machine) and the Figure 3 forget the case in which a UAC sends a BYE during an early-dialog as RFC3261 allows:

RFC 3261:
----------------
15 Terminating a Session
When a BYE is received on a dialog, any session
associated with that dialog SHOULD terminate. A UA MUST NOT send a
BYE outside of a dialog. The caller's UA MAY send a BYE for either
confirmed or early dialogs, and the callee's UA MAY send a BYE on
confirmed dialogs, but MUST NOT send a BYE on early dialogs.
----------------

So it should be a new row in Figure 3 from "Early" to "Terminate" labeled "local-bye/remote-bye". It would be "local-bye" in case of UAC and "remote-bye" in case of UAS.

Report New Errata