fw: Nack in pipelines and best-route strategy
* in PIT out-record, add last incoming Nack field
* create incoming Nack pipeline
* create outgoing Nack pipeline
* modify Interest loop pipeline to send Nack upon duplicate Nonce
* in strategy API, add after receive Nack trigger and send Nack action
* in best-route strategy, send Nack-NoRoute before rejecting pending Interest
* in best-route strategy, process incoming Nack
Other changes include:
* Pit::find
* StrategyTester saved arguments structs
* TopologyTester transmit at Transport level
refs #3156
Change-Id: I7868561c0838231083d471261200aeb280cc6e9d
diff --git a/daemon/table/pit-out-record.hpp b/daemon/table/pit-out-record.hpp
index c75e005..4717779 100644
--- a/daemon/table/pit-out-record.hpp
+++ b/daemon/table/pit-out-record.hpp
@@ -1,11 +1,12 @@
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
- * Copyright (c) 2014 Regents of the University of California,
- * Arizona Board of Regents,
- * Colorado State University,
- * University Pierre & Marie Curie, Sorbonne University,
- * Washington University in St. Louis,
- * Beijing Institute of Technology
+ * Copyright (c) 2014-2015, Regents of the University of California,
+ * Arizona Board of Regents,
+ * Colorado State University,
+ * University Pierre & Marie Curie, Sorbonne University,
+ * Washington University in St. Louis,
+ * Beijing Institute of Technology,
+ * The University of Memphis.
*
* This file is part of NFD (Named Data Networking Forwarding Daemon).
* See AUTHORS.md for complete list of NFD authors and contributors.
@@ -20,7 +21,7 @@
*
* You should have received a copy of the GNU General Public License along with
* NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
- **/
+ */
#ifndef NFD_DAEMON_TABLE_PIT_OUT_RECORD_HPP
#define NFD_DAEMON_TABLE_PIT_OUT_RECORD_HPP
@@ -30,14 +31,49 @@
namespace nfd {
namespace pit {
-/** \class OutRecord
- * \brief contains information about an Interest toward an outgoing face
+/** \brief contains information about an Interest toward an outgoing face
*/
class OutRecord : public FaceRecord
{
public:
explicit
OutRecord(shared_ptr<Face> face);
+
+ /** \return last NACK returned by \p getFace()
+ *
+ * A nullptr return value means the Interest is still pending or has timed out.
+ * A non-null return value means the last outgoing Interest has been NACKed.
+ */
+ const lp::NackHeader*
+ getIncomingNack() const
+ {
+ return m_incomingNack.get();
+ }
+
+ /** \brief sets a NACK received from \p getFace()
+ * \return whether incoming NACK is accepted
+ *
+ * This is invoked in incoming NACK pipeline.
+ * An incoming NACK is accepted if its Nonce matches \p getLastNonce().
+ * If accepted, \p nack.getHeader() will be copied,
+ * and any pointer previously returned by \p .getIncomingNack() .
+ */
+ bool
+ setIncomingNack(const lp::Nack& nack);
+
+ /** \brief clears last NACK
+ *
+ * This is invoked in outgoing Interest pipeline.
+ * This invalidates any pointer previously returned by \p .getIncomingNack() .
+ */
+ void
+ clearIncomingNack()
+ {
+ m_incomingNack.reset();
+ }
+
+private:
+ unique_ptr<lp::NackHeader> m_incomingNack;
};
} // namespace pit