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/*
* Copyright (c) 2021 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/callbacks.h>
#include <hicn/transport/interfaces/socket_consumer.h>
#include <hicn/transport/interfaces/statistics.h>
#include <hicn/transport/utils/object_pool.h>
#include <protocols/data_processing_events.h>
#include <protocols/fec_base.h>
#include <protocols/indexer.h>
#include <protocols/protocol.h>
#include <protocols/reassembly.h>
#include <array>
#include <atomic>
namespace transport {
namespace protocol {
using namespace core;
class IndexVerificationManager;
using ReadCallback = interface::ConsumerSocket::ReadCallback;
class TransportProtocol
: public ContentObjectProcessingEventCallback,
public Protocol,
public std::enable_shared_from_this<TransportProtocol> {
static constexpr std::size_t interest_pool_size = 4096;
friend class ManifestIndexManager;
public:
TransportProtocol(implementation::ConsumerSocket *icn_socket,
Indexer *indexer, Reassembly *reassembly);
virtual ~TransportProtocol();
virtual int start();
using Protocol::stop;
virtual void resume();
/**
* @brief Get the size of any additional header added by the specific
* transport implementation.
*
* @return The header length in bytes.
*/
virtual std::size_t transportHeaderLength() { return 0; }
virtual void scheduleNextInterests() = 0;
// Events generated by the indexing
virtual void onContentReassembled(const std::error_code &ec);
virtual void onPacketDropped(Interest &interest,
ContentObject &content_object,
const std::error_code &ec) override = 0;
virtual void onReassemblyFailed(std::uint32_t missing_segment) override = 0;
protected:
virtual void onContentObjectReceived(Interest &i, ContentObject &c,
std::error_code &ec) = 0;
virtual void onInterestTimeout(Interest::Ptr &i, const Name &n) = 0;
virtual void sendInterest(const Name &interest_name,
std::array<uint32_t, MAX_AGGREGATED_INTEREST>
*additional_suffixes = nullptr,
uint32_t len = 0);
template <typename FECHandler, typename AllocatorHandler>
void enableFEC(FECHandler &&fec_handler,
AllocatorHandler &&allocator_handler) {
if (!fec_decoder_) {
// Try to get FEC from environment
const char *fec_str = std::getenv("TRANSPORT_FEC_TYPE");
if (fec_str && (fec_type_ == fec::FECType::UNKNOWN)) {
LOG(INFO) << "Using FEC " << fec_str;
fec_type_ = fec::FECUtils::fecTypeFromString(fec_str);
}
if (fec_type_ == fec::FECType::UNKNOWN) {
return;
}
fec_decoder_ = fec::FECUtils::getDecoder(
fec_type_, indexer_verifier_->getFirstSuffix());
fec_decoder_->setFECCallback(std::forward<FECHandler>(fec_handler));
fec_decoder_->setBufferCallback(
std::forward<AllocatorHandler>(allocator_handler));
indexer_verifier_->enableFec(fec_type_);
}
}
virtual void reset();
private:
// Consumer Callback
void onContentObject(Interest &i, ContentObject &c) override;
void onTimeout(Interest::Ptr &i, const Name &n) override;
void onError(const std::error_code &ec) override;
protected:
implementation::ConsumerSocket *socket_;
std::unique_ptr<Indexer> indexer_verifier_;
std::unique_ptr<Reassembly> reassembly_;
std::unique_ptr<fec::ConsumerFEC> fec_decoder_;
// True if it si the first time we schedule an interest
std::atomic<bool> is_first_;
interface::TransportStatistics *stats_;
// Callbacks
interface::ConsumerInterestCallback *on_interest_retransmission_;
interface::ConsumerInterestCallback *on_interest_output_;
interface::ConsumerInterestCallback *on_interest_timeout_;
interface::ConsumerInterestCallback *on_interest_satisfied_;
interface::ConsumerContentObjectCallback *on_content_object_input_;
interface::ConsumerContentObjectCallback *on_content_object_;
interface::ConsumerTimerCallback *stats_summary_;
interface::StrategyCallback *on_fwd_strategy_;
interface::StrategyCallback *on_rec_strategy_;
ReadCallback *on_payload_;
bool is_async_;
fec::FECType fec_type_;
};
} // end namespace protocol
} // end namespace transport
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