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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 <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>, utils::CryptoHashType>;
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
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