--- a
+++ b/src/policies/DIF/RMT/MaxQueue/ReadRateReducer/ReadRateReducer.cc
@@ -0,0 +1,64 @@
+//
+// Copyright Š 2014 - 2015 PRISTINE Consortium (http://ict-pristine.eu)
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program. If not, see http://www.gnu.org/licenses/.
+//
+
+#include <ReadRateReducer.h>
+
+Define_Module(ReadRateReducer);
+
+void ReadRateReducer::onPolicyInit()
+{
+ fwd = check_and_cast<IntPDUForwarding*>
+ (getModuleByPath("^.pduForwardingPolicy"));
+}
+
+bool ReadRateReducer::run(RMTQueue* queue)
+{
+ if (queue->getLength() >= queue->getMaxLength())
+ {
+ if (queue->getType() == RMTQueue::OUTPUT)
+ {
+ const PDU* pdu = dynamic_cast<const PDU*>(queue->getLastPDU());
+
+ // this isn't optimal, but there doesn't seem to be a better way to
+ // get output->input port mapping in connection-less forwarding
+ std::vector<RMTPort*> inputPorts = fwd->lookup(
+ pdu->getSrcAddr(),
+ pdu->getConnId().getQoSId());
+
+ if (!inputPorts.front()->hasBlockedInput())
+ { // block read from the input port
+ inputPorts.front()->blockInput();
+ }
+
+ }
+ }
+
+ return false;
+}
+
+void ReadRateReducer::onQueueLengthDrop(RMTQueue* queue)
+{
+ const PDU* pdu = dynamic_cast<const PDU*>(queue->getLastPDU());
+ std::vector<RMTPort*> inputPorts = fwd->lookup(
+ pdu->getSrcAddr(),
+ pdu->getConnId().getQoSId());
+
+ if (inputPorts.front()->hasBlockedInput())
+ { // the output buffers are keeping up again, continue receiving on input
+ inputPorts.front()->unblockInput();
+ }
+}