- initial import

src/libs/ice/ICEPacketTimer.cpp

@@ -0,0 +1,94 @@
+/* Copyright(C) 2007-2014 VoIP objects (voipobjects.com)
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "ICEPlatform.h"
+#include "ICEPacketTimer.h"
+#include "ICETime.h"
+
+using namespace ice;
+PacketScheduler::PacketScheduler()
+{
+  mTimestamp = 0;
+  mAttemptCounter = 0;
+  mInitialRTO = 100;
+  mLastRTO = 100;
+}
+
+PacketScheduler::~PacketScheduler()
+{
+}
+
+void PacketScheduler::setInitialRTO(int value)
+{
+  mInitialRTO = value;
+}
+
+int  PacketScheduler::initialRTO()
+{
+  return mInitialRTO;
+}
+
+void PacketScheduler::start()
+{
+  mLastRTO = mInitialRTO;
+  mAttemptCounter = 0;
+  mTimestamp = 0;//ICETimeHelper::timestamp();
+}
+
+void PacketScheduler::stop()
+{
+  ;  
+}
+
+bool PacketScheduler::isTimeToRetransmit()
+{
+  if (!mTimestamp)
+  {
+    mTimestamp = ICETimeHelper::timestamp();
+    return true;
+  }
+
+  unsigned currentTime = ICETimeHelper::timestamp();
+  unsigned delta =  ICETimeHelper::findDelta(mTimestamp, currentTime);
+  
+  return delta >= mLastRTO;
+}
+  
+/// Instructs timer that attempt made
+void PacketScheduler::attemptMade()
+{
+  // Increase attempt counter
+  mAttemptCounter++;
+
+  // Save new timestamp
+  mTimestamp = ICETimeHelper::timestamp();
+  
+  // Increase mLastRTO
+#ifndef ICE_SIMPLE_SCHEDULE  
+  mLastRTO *= 2;
+#endif
+}
+
+/// Checks if attempt limit reached
+bool PacketScheduler::isAttemptLimitReached()
+{
+  return mAttemptCounter >= ICE_TRANSACTION_RTO_LIMIT;
+}
+  
+/// Checks if timeout happens
+bool PacketScheduler::isTimeout()
+{
+  // Are attempts to send finished?
+  if (!isAttemptLimitReached())
+    return false;
+  
+  // Get current time
+  unsigned int currentTime = ICETimeHelper::timestamp();
+  
+  // Get difference between current time and last send attempt
+  unsigned int delta = ICETimeHelper::findDelta(mTimestamp, currentTime);
+
+  return delta > mLastRTO * 16;
+}