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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/errors/runtime_exception.h>
#include <hicn/transport/errors/unexpected_manifest_exception.h>
#include <hicn/transport/utils/literals.h>
#include <protocols/indexer.h>
#include <protocols/reassembly.h>
#include <protocols/verification_manager.h>
#include <deque>
namespace transport {
namespace interface {
class ConsumerSocket;
}
namespace protocol {
class Reassembly;
class TransportProtocol;
class IncrementalIndexer : public Indexer {
public:
IncrementalIndexer(implementation::ConsumerSocket *icn_socket,
TransportProtocol *transport, Reassembly *reassembly)
: socket_(icn_socket),
reassembly_(reassembly),
transport_protocol_(transport),
final_suffix_(std::numeric_limits<uint32_t>::max()),
first_suffix_(0),
next_download_suffix_(0),
next_reassembly_suffix_(0),
verification_manager_(
std::make_unique<SignatureVerificationManager>(icn_socket)) {
if (reassembly_) {
reassembly_->setIndexer(this);
}
}
IncrementalIndexer(const IncrementalIndexer &) = delete;
IncrementalIndexer(IncrementalIndexer &&other)
: socket_(other.socket_),
reassembly_(other.reassembly_),
transport_protocol_(other.transport_protocol_),
final_suffix_(other.final_suffix_),
first_suffix_(other.first_suffix_),
next_download_suffix_(other.next_download_suffix_),
next_reassembly_suffix_(other.next_reassembly_suffix_),
verification_manager_(std::move(other.verification_manager_)) {
if (reassembly_) {
reassembly_->setIndexer(this);
}
}
/**
*
*/
virtual ~IncrementalIndexer() {}
TRANSPORT_ALWAYS_INLINE virtual void reset(
std::uint32_t offset = 0) override {
final_suffix_ = std::numeric_limits<uint32_t>::max();
next_download_suffix_ = offset;
next_reassembly_suffix_ = offset;
}
/**
* Retrieve from the manifest the next suffix to retrieve.
*/
TRANSPORT_ALWAYS_INLINE virtual uint32_t getNextSuffix() override {
return next_download_suffix_ <= final_suffix_ ? next_download_suffix_++
: IndexManager::invalid_index;
}
TRANSPORT_ALWAYS_INLINE virtual void setFirstSuffix(
uint32_t suffix) override {
first_suffix_ = suffix;
}
/**
* Retrive the next segment to be reassembled.
*/
TRANSPORT_ALWAYS_INLINE virtual uint32_t getNextReassemblySegment() override {
return next_reassembly_suffix_ <= final_suffix_
? next_reassembly_suffix_++
: IndexManager::invalid_index;
}
TRANSPORT_ALWAYS_INLINE virtual bool isFinalSuffixDiscovered() override {
return final_suffix_ != std::numeric_limits<uint32_t>::max();
}
TRANSPORT_ALWAYS_INLINE virtual uint32_t getFinalSuffix() override {
return final_suffix_;
}
void onContentObject(core::Interest::Ptr &&interest,
core::ContentObject::Ptr &&content_object) override;
TRANSPORT_ALWAYS_INLINE void setReassembly(Reassembly *reassembly) {
reassembly_ = reassembly;
if (reassembly_) {
reassembly_->setIndexer(this);
}
}
TRANSPORT_ALWAYS_INLINE bool onKeyToVerify() override {
return verification_manager_->onKeyToVerify();
}
protected:
implementation::ConsumerSocket *socket_;
Reassembly *reassembly_;
TransportProtocol *transport_protocol_;
uint32_t final_suffix_;
uint32_t first_suffix_;
uint32_t next_download_suffix_;
uint32_t next_reassembly_suffix_;
std::unique_ptr<VerificationManager> verification_manager_;
};
} // end namespace protocol
} // end namespace transport
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