fw: properly handle consumer retransmission in AsfStrategy
Do not reject an existing PIT entry if there are no
next hops during consumer retransmission
refs: #4874
Change-Id: Iea8602897e99fdf2f6fd0226b5eb74bd7a4bced1
diff --git a/daemon/fw/algorithm.hpp b/daemon/fw/algorithm.hpp
index 7ee0f38..95d8bc5 100644
--- a/daemon/fw/algorithm.hpp
+++ b/daemon/fw/algorithm.hpp
@@ -1,6 +1,6 @@
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
- * Copyright (c) 2014-2018, Regents of the University of California,
+ * Copyright (c) 2014-2019, Regents of the University of California,
* Arizona Board of Regents,
* Colorado State University,
* University Pierre & Marie Curie, Sorbonne University,
@@ -27,6 +27,7 @@
#define NFD_DAEMON_FW_PIT_ALGORITHM_HPP
#include "core/scope-prefix.hpp"
+#include "table/fib.hpp"
#include "table/pit-entry.hpp"
/** \file
@@ -83,6 +84,29 @@
time::steady_clock::TimePoint
getLastOutgoing(const pit::Entry& pitEntry);
+/** \brief pick an eligible NextHop with earliest out-record
+ * \note It is assumed that every nexthop has an out-record.
+ */
+fib::NextHopList::const_iterator
+findEligibleNextHopWithEarliestOutRecord(const Face& inFace, const Interest& interest,
+ const fib::NextHopList& nexthops,
+ const shared_ptr<pit::Entry>& pitEntry);
+
+/** \brief determines whether a NextHop is eligible i.e. not the same inFace
+ * \param inFace incoming face of current Interest
+ * \param interest incoming Interest
+ * \param nexthop next hop
+ * \param pitEntry PIT entry
+ * \param wantUnused if true, NextHop must not have unexpired out-record
+ * \param now time::steady_clock::now(), ignored if !wantUnused
+ */
+bool
+isNextHopEligible(const Face& inFace, const Interest& interest,
+ const fib::NextHop& nexthop,
+ const shared_ptr<pit::Entry>& pitEntry,
+ bool wantUnused = false,
+ time::steady_clock::TimePoint now = time::steady_clock::TimePoint::min());
+
} // namespace fw
} // namespace nfd