New issue
Advanced search Search tips
Note: Color blocks (like or ) mean that a user may not be available. Tooltip shows the reason.
Starred by 6 users
Status: Available
Owner: ----
NextAction: ----
OS: ----
Pri: 3
Type: Bug

Sign in to add a comment
Half-trickle ICE offer does not contain an a=end-of-candidates attribute.
Reported by, Sep 2 2014 Back to list
What steps will reproduce the problem?
1.Make a chrome (half-trickle) to chrome (full trickle-ice) audio/video call.
2.The initial offer from the caller contains ICE candidates and the a=ice-options:trickle attribute, but does not include an "a=end-of-candidates" attribute.

What is the expected result?
Per draft-ietf-mmusic-trickle-ice-01 draft "Trickle ICE: Provisioning of Candidates for the Interactive Connectivity Establishment (ICE) Proctocol", section 4.1 Unilateral Use of Trickle ICE states:
"half is about having the caller sned a regular vanilla ICE offer, with a complete set of candidates. Half trickle offers will typically contain an end-of-candidates indication".

I understand the wording of this draft states "typically", but Chrome should include the end-of-candidates attribute when "half" trickle ICE is used to indicate the harvesting of candidates has completed and that the offer contains a full list of candidates.

What do you see instead?
The does not send an "a=end-of-candidates" attribute in its offer. Without the end-of-candidates attribute it is difficult to determine if the offer can be treated as a vanilla ice offer or as an initial trickle ICE offere (i.e. with more candidates to follow).

What version of the product are you using? On what operating system?
Chrome version Version 37.0.2062.102 m
Windows 7 Professional

Please provide any additional information below.
Attaching the caller and callee browser console logs.

28.1 KB View Download
30.0 KB View Download
Project Member Comment 1 by, Sep 3 2014
I'm not sure whether this draft is still valid or not. Nor found anything in the source too.

@justin, please help to comment!
Project Member Comment 2 by, Sep 3 2014
Labels: Area-PeerConnection
Status: Available
Yes, this description is correct. See for the details that we have decided.
Comment 3 by, Oct 16 2014
Labels: Mstone-41 EngTriaged
Tentatively put to M41. Justin, feel free to adjust prio.
Project Member Comment 4 by, Jan 7 2015
Labels: -Mstone-41 Mstone-42
Project Member Comment 5 by, Feb 19 2015
Labels: -Mstone-42 Mstone-44
This looks like it's not hitting m42.  Update it if I'm wrong.
Project Member Comment 6 by, Jan 29 2016
Labels: -Mstone-44
I don't see any recent CLs linked to this bug, so I don't think it's been fixed. I'm therefore leaving this in an open state, but I am removing the milestone label since this bug hasn't been updated in quite some time.
Project Member Comment 7 by, Nov 8 2016
Labels: Pri-3
Project Member Comment 8 by, Dec 14 2016
Owner: ----
Sign in to add a comment