From 6ef9fbfcc09b2b98446f3d78c171bb0a54e62e2a Mon Sep 17 00:00:00 2001
From: Stephen Birarda <commit@birarda.com>
Date: Tue, 12 Apr 2016 18:01:20 -0700
Subject: [PATCH] send an ACK packet from ice server for verified hearbeat

---
 ice-server/src/IceServer.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ice-server/src/IceServer.cpp b/ice-server/src/IceServer.cpp
index b66ccaa057..c3e57b1d36 100644
--- a/ice-server/src/IceServer.cpp
+++ b/ice-server/src/IceServer.cpp
@@ -82,6 +82,11 @@ void IceServer::processPacket(std::unique_ptr<udt::Packet> packet) {
             if (peer) {
                 // so that we can send packets to the heartbeating peer when we need, we need to activate a socket now
                 peer->activateMatchingOrNewSymmetricSocket(nlPacket->getSenderSockAddr());
+
+                // we have an active and verified heartbeating peer
+                // send them an ACK packet so they know that they are being heard and ready for ICE
+                static auto ackPacket = NLPacket::create(PacketType::ICEServerHeartbeatACK);
+                _serverSocket.writePacket(*ackPacket, nlPacket->getSenderSockAddr());
             } else {
                 // we couldn't verify this peer - respond back to them so they know they may need to perform keypair re-generation
                 static auto deniedPacket = NLPacket::create(PacketType::ICEServerHeartbeatDenied);