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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/core/packet.h>
#include <hicn/transport/utils/membuf.h>
#include <hicn/transport/utils/object_pool.h>
#include <hicn/transport/utils/ring_buffer.h>
#include <deque>
#include <functional>
namespace transport {
namespace core {
enum class ConnectorType : uint8_t {
SOCKET_CONNECTOR,
RAW_SOCKET_CONNECTOR,
VPP_CONNECTOR,
};
class Connector {
protected:
enum class ConnectorState {
CLOSED,
CONNECTING,
CONNECTED,
};
public:
static constexpr std::size_t packet_size = 2048;
static constexpr std::size_t queue_size = 4096;
static constexpr std::size_t packet_pool_size = 4096;
using PacketRing = utils::CircularFifo<Packet::MemBufPtr, queue_size>;
using PacketQueue = std::deque<Packet::MemBufPtr>;
using PacketReceivedCallback = std::function<void(Packet::MemBufPtr &&)>;
using OnReconnect = std::function<void()>;
using PacketSentCallback = std::function<void()>;
Connector(PacketReceivedCallback &&receive_callback,
OnReconnect &&reconnect_callback);
virtual ~Connector(){};
virtual void send(const Packet::MemBufPtr &packet) = 0;
virtual void send(const uint8_t *packet, std::size_t len,
const PacketSentCallback &packet_sent = 0) = 0;
virtual void close() = 0;
virtual ConnectorState state() { return state_; };
virtual bool isConnected() { return state_ == ConnectorState::CONNECTED; }
protected:
void increasePoolSize(std::size_t size = packet_pool_size);
TRANSPORT_ALWAYS_INLINE utils::ObjectPool<utils::MemBuf>::Ptr getPacket() {
auto result = packet_pool_.get();
while (TRANSPORT_EXPECT_FALSE(!result.first)) {
// Add packets to the pool
increasePoolSize();
result = packet_pool_.get();
}
if (result.second->isChained()) {
result.second->separateChain(result.second->next(),
result.second->prev());
}
result.second->trimEnd(result.second->length());
return std::move(result.second);
}
private:
void init();
protected:
static std::once_flag init_flag_;
utils::ObjectPool<utils::MemBuf> packet_pool_;
PacketQueue output_buffer_;
// Connector events
PacketReceivedCallback receive_callback_;
OnReconnect on_reconnect_callback_;
// Connector state
ConnectorState state_;
};
} // end namespace core
} // end namespace transport
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