[HICN-534] Major rework on libtransport organization

Change-Id: I361b83a18b4fd59be136d5f0817fc28e17e89884
Signed-off-by: Mauro Sardara <msardara@cisco.com>

1 files changed, 92 insertions, 0 deletions

diff --git a/libtransport/src/protocols/manifest_incremental_indexer.h b/libtransport/src/protocols/manifest_incremental_indexer.h
new file mode 100644
index 000000000..88ae1720b
--- /dev/null
+++ b/libtransport/src/protocols/manifest_incremental_indexer.h
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2017-2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <implementation/socket.h>
+#include <protocols/incremental_indexer.h>
+#include <utils/suffix_strategy.h>
+
+#include <list>
+
+namespace transport {
+
+namespace protocol {
+
+class ManifestIncrementalIndexer : public IncrementalIndexer {
+  static constexpr double alpha = 0.3;
+
+ public:
+  using SuffixQueue = std::queue<uint32_t>;
+  using HashEntry = std::pair<std::vector<uint8_t>, core::HashAlgorithm>;
+
+  ManifestIncrementalIndexer(implementation::ConsumerSocket *icn_socket,
+                             TransportProtocol *transport,
+                             Reassembly *reassembly);
+
+  ManifestIncrementalIndexer(IncrementalIndexer &&indexer)
+      : IncrementalIndexer(std::move(indexer)),
+        suffix_strategy_(utils::SuffixStrategyFactory::getSuffixStrategy(
+            core::NextSegmentCalculationStrategy::INCREMENTAL,
+            next_download_suffix_, 0)) {
+    for (uint32_t i = first_suffix_; i < next_download_suffix_; i++) {
+      suffix_queue_.push(i);
+    }
+  }
+
+  virtual ~ManifestIncrementalIndexer() = default;
+
+  void reset(std::uint32_t offset = 0) override;
+
+  void onContentObject(core::Interest::Ptr &&interest,
+                       core::ContentObject::Ptr &&content_object) override;
+
+  uint32_t getNextSuffix() override;
+
+  uint32_t getNextReassemblySegment() override;
+
+  bool isFinalSuffixDiscovered() override;
+
+  uint32_t getFinalSuffix() override;
+
+ private:
+  void onUntrustedManifest(core::Interest::Ptr &&interest,
+                           core::ContentObject::Ptr &&content_object);
+  void onUntrustedContentObject(core::Interest::Ptr &&interest,
+                                core::ContentObject::Ptr &&content_object);
+  void processTrustedManifest(core::ContentObject::Ptr &&content_object);
+  void onManifestReceived(core::Interest::Ptr &&i,
+                          core::ContentObject::Ptr &&c);
+  void onManifestTimeout(core::Interest::Ptr &&i);
+  VerificationPolicy verifyContentObject(
+      const HashEntry &manifest_hash,
+      const core::ContentObject &content_object);
+  bool checkUnverifiedSegments(std::uint32_t suffix, const HashEntry &hash);
+
+ protected:
+  std::unique_ptr<utils::SuffixStrategy> suffix_strategy_;
+  SuffixQueue suffix_queue_;
+
+  // Hash verification
+  std::unordered_map<uint32_t, HashEntry> suffix_hash_map_;
+
+  std::unordered_map<uint32_t,
+                     std::pair<core::Interest::Ptr, core::ContentObject::Ptr>>
+      unverified_segments_;
+};
+
+}  // end namespace protocol
+
+}  // end namespace transport