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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/interfaces/socket_consumer.h>
#include <hicn/transport/protocols/verification_manager.h>
#include <hicn/transport/utils/literals.h>
#include <deque>
namespace transport {
namespace protocol {
class IndexManager {
public:
static constexpr uint32_t invalid_index = ~0;
/**
*
*/
virtual ~IndexManager() = default;
/**
* Retrieve from the manifest the next suffix to retrieve.
*/
virtual uint32_t getNextSuffix() = 0;
virtual void setFirstSuffix(uint32_t suffix) = 0;
/**
* Retrive the next segment to be reassembled.
*/
virtual uint32_t getNextReassemblySegment() = 0;
virtual bool isFinalSuffixDiscovered() = 0;
virtual uint32_t getFinalSuffix() = 0;
virtual void reset() = 0;
};
class IndexVerificationManager : public IndexManager {
public:
/**
*
*/
virtual ~IndexVerificationManager() = default;
/**
* The ownership of the ContentObjectManifest is moved
* from the caller to the VerificationManager
*/
virtual bool onManifest(core::ContentObject::Ptr &&content_object) = 0;
/**
* The content object must just be verified; the ownership is still of the
* caller.
*/
virtual bool onContentObject(const core::ContentObject &content_object) = 0;
};
class IncrementalIndexManager : public IndexVerificationManager {
public:
IncrementalIndexManager(interface::ConsumerSocket *icn_socket)
: socket_(icn_socket),
final_suffix_(std::numeric_limits<uint32_t>::max()),
next_download_suffix_(0),
next_reassembly_suffix_(0),
verification_manager_(
std::make_unique<SignatureVerificationManager>(icn_socket)) {}
/**
*
*/
virtual ~IncrementalIndexManager() {}
TRANSPORT_ALWAYS_INLINE virtual void reset() override {
final_suffix_ = std::numeric_limits<uint32_t>::max();
next_download_suffix_ = first_suffix_;
next_reassembly_suffix_ = 0;
}
/**
* 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_;
}
TRANSPORT_ALWAYS_INLINE bool onManifest(
core::ContentObject::Ptr &&content_object) override {
throw errors::UnexpectedManifestException();
}
TRANSPORT_ALWAYS_INLINE bool onContentObject(
const core::ContentObject &content_object) override {
auto ret = verification_manager_->onPacketToVerify(content_object);
if (TRANSPORT_EXPECT_FALSE(content_object.testRst())) {
final_suffix_ = content_object.getName().getSuffix();
}
return ret;
}
protected:
interface::ConsumerSocket *socket_;
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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