Limit number of TURN servers to 32
Limit the number of TURN servers to 32 in order to allow the
prioritization to assume a fixed offset for (de)prioritizing
candidates. See
https://github.com/w3c/webrtc-pc/pull/2679
for discussion including some data on current usage.
Guarded by WebRTC-LimitTurnServers which is used as a killswitch.
BUG=webrtc:13195
Change-Id: Ib12726af426ae4238aa7eb6aa062c71af52d495f
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/285340
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Philipp Hancke <phancke@microsoft.com>
Reviewed-by: Florent Castelli <orphis@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38767}
diff --git a/api/candidate.h b/api/candidate.h
index b8aaebc..281f2f0 100644
--- a/api/candidate.h
+++ b/api/candidate.h
@@ -25,6 +25,10 @@
namespace cricket {
+// TURN servers are limited to 32 in accordance with
+// https://w3c.github.io/webrtc-pc/#dom-rtcconfiguration-iceservers
+static constexpr size_t kMaxTurnServers = 32;
+
// Candidate for ICE based connection discovery.
// TODO(phoglund): remove things in here that are not needed in the public API.