commit 9a5c6f8f3fc8adefc69809c712e0466586f2a2d8
author Qingsi Wang <qingsi@google.com> Thu Feb 01 10:38:40 2018 -0800
committer Commit Bot <commit-bot@chromium.org> Thu Feb 01 19:32:21 2018 +0000
tree 45549f60066c6f31cb75e87d656ae98fcbe135dd
parent dc221515ff6876e9fb3cf4f9ac4d308c8945c877

Add the network preference to RTCConfiguration.

The network preference is added to RTCConfiguration and passed to ICE.
ICE considers now the preference set by applications over network
interface types when making decisions in candidate pair switching.

Bug: webrtc:8816
Change-Id: I40d2612705b54c83dd45772ac855808e0a76b1e1
Reviewed-on: https://webrtc-review.googlesource.com/44020
Commit-Queue: Qingsi Wang <qingsi@google.com>
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Reviewed-by: Taylor Brandstetter <deadbeef@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21855}

api/peerconnectioninterface.h

diff --git a/api/peerconnectioninterface.h b/api/peerconnectioninterface.h
index 7087de6..0125455 100644
--- a/api/peerconnectioninterface.h
+++ b/api/peerconnectioninterface.h
@@ -491,6 +491,12 @@
     // called.
     webrtc::TurnCustomizer* turn_customizer = nullptr;
 
+    // Preferred network interface.
+    // A candidate pair on a preferred network has a higher precedence in ICE
+    // than one on an un-preferred network, regardless of priority or network
+    // cost.
+    rtc::Optional<rtc::AdapterType> network_preference;
+
     // Configure the SDP semantics used by this PeerConnection. Note that the
     // WebRTC 1.0 specification requires kUnifiedPlan semantics. The
     // RtpTransceiver API is only available with kUnifiedPlan semantics.