rib: Add RIB dataset publisher

refs: #1662
Change-Id: I97885c07af131a7ea78d074b39df884178f09416
diff --git a/rib/rib-status-publisher.cpp b/rib/rib-status-publisher.cpp
new file mode 100644
index 0000000..76a164c
--- /dev/null
+++ b/rib/rib-status-publisher.cpp
@@ -0,0 +1,97 @@
+/* -*- 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,
+ *                      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.
+ *
+ * NFD is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * NFD 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 General Public License for more details.
+ *
+ * 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/>.
+ */
+
+#include "rib/rib-status-publisher.hpp"
+#include "rib/rib.hpp"
+#include "core/logger.hpp"
+
+#include <ndn-cxx/management/nfd-rib-entry.hpp>
+#include <ndn-cxx/face.hpp>
+
+namespace nfd {
+namespace rib {
+
+NFD_LOG_INIT("RibStatusPublisher");
+
+RibStatusPublisher::RibStatusPublisher(const Rib& rib,
+                                       ndn::Face& face,
+                                       const Name& prefix,
+                                       ndn::KeyChain& keyChain)
+  : SegmentPublisher<ndn::Face>(face, prefix, keyChain)
+  , m_rib(rib)
+{
+}
+
+RibStatusPublisher::~RibStatusPublisher()
+{
+}
+
+size_t
+RibStatusPublisher::generate(ndn::EncodingBuffer& outBuffer)
+{
+  size_t totalLength = 0;
+
+  for (Rib::const_iterator ribIt = m_rib.begin(); ribIt != m_rib.end(); ++ribIt)
+    {
+      RibEntry& entry = *ribIt->second;
+
+      const Name& prefix = entry.getName();
+      size_t ribEntryLength = 0;
+
+      ndn::nfd::RibEntry tlvEntry;
+      const RibEntry::FaceList& faces = entry.getFaces();
+
+      for (RibEntry::FaceList::const_iterator faceIt = faces.begin();
+           faceIt != faces.end(); ++faceIt)
+        {
+          const FaceEntry& face = *faceIt;
+
+          ndn::nfd::Route route;
+          route
+            .setFaceId(face.faceId)
+            .setOrigin(face.origin)
+            .setCost(face.cost)
+            .setFlags(face.flags);
+          if (face.expires < time::steady_clock::TimePoint::max()) {
+            route.setExpirationPeriod(time::duration_cast<time::milliseconds>
+                                      (face.expires - time::steady_clock::now()));
+          }
+          tlvEntry.addRoute(route);
+        }
+
+      tlvEntry.setName(prefix);
+      ribEntryLength += tlvEntry.wireEncode(outBuffer);
+
+      NFD_LOG_DEBUG("generate: rib entry length = " << ribEntryLength);
+
+      totalLength += ribEntryLength;
+    }
+  NFD_LOG_DEBUG("generate: Total length = " << totalLength);
+  return totalLength;
+}
+
+
+} // namespace rib
+} // namespace nfd