From 3132cd1198888348ffeecb888bf1a82cbec31af7 Mon Sep 17 00:00:00 2001
From: Cody Henthorne <cody@signal.org>
Date: Tue, 6 Dec 2022 22:21:14 -0500
Subject: [PATCH] Drop group call rings for large groups.

---
 .../securesms/service/webrtc/IdleActionProcessor.java      | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/app/src/main/java/org/thoughtcrime/securesms/service/webrtc/IdleActionProcessor.java b/app/src/main/java/org/thoughtcrime/securesms/service/webrtc/IdleActionProcessor.java
index 7b030b9ca..c48b807d7 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/service/webrtc/IdleActionProcessor.java
+++ b/app/src/main/java/org/thoughtcrime/securesms/service/webrtc/IdleActionProcessor.java
@@ -15,6 +15,7 @@ import org.thoughtcrime.securesms.notifications.profiles.NotificationProfiles;
 import org.thoughtcrime.securesms.recipients.Recipient;
 import org.thoughtcrime.securesms.ringrtc.RemotePeer;
 import org.thoughtcrime.securesms.service.webrtc.state.WebRtcServiceState;
+import org.thoughtcrime.securesms.util.FeatureFlags;
 import org.whispersystems.signalservice.api.messages.calls.OfferMessage;
 
 import java.util.UUID;
@@ -94,6 +95,12 @@ public class IdleActionProcessor extends WebRtcActionProcessor {
   {
     Log.i(TAG, "handleGroupCallRingUpdate(): recipient: " + remotePeerGroup.getId() + " ring: " + ringId + " update: " + ringUpdate);
 
+    int groupSize = remotePeerGroup.getRecipient().getParticipantIds().size();
+    if (groupSize > FeatureFlags.maxGroupCallRingSize()) {
+      Log.w(TAG, "Received ring request for large group, dropping. size: " + groupSize + " max: " + FeatureFlags.maxGroupCallRingSize());
+      return currentState;
+    }
+
     if (ringUpdate != CallManager.RingUpdate.REQUESTED) {
       SignalDatabase.groupCallRings().insertOrUpdateGroupRing(ringId, System.currentTimeMillis(), ringUpdate);
       return currentState;