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-rw-r--r--libtransport/src/hicn/transport/protocols/manifest_incremental_indexer.h91
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diff --git a/libtransport/src/hicn/transport/protocols/manifest_incremental_indexer.h b/libtransport/src/hicn/transport/protocols/manifest_incremental_indexer.h
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+/*
+ * 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 <hicn/transport/interfaces/socket.h>
+#include <hicn/transport/protocols/incremental_indexer.h>
+#include <hicn/transport/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(interface::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