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/**
* Copyright (C) 2016 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#pragma once
#include <asio.hpp>
#include <asio/system_timer.hpp>
#include <boost/optional.hpp>
#include <vector>
#include "mongo/config.h"
#include "mongo/platform/atomic_word.h"
#include "mongo/stdx/mutex.h"
#include "mongo/util/net/abstract_message_port.h"
#include "mongo/util/net/asio_ssl_context.h"
#include "mongo/util/net/message.h"
#include "mongo/util/net/sockaddr.h"
#include "mongo/util/time_support.h"
#ifdef MONGO_CONFIG_SSL
#include <asio/ssl.hpp>
#endif
namespace mongo {
class ASIOMessagingPort final : public AbstractMessagingPort {
public:
/**
* This is the "Ingress Constructor", used by the listener. For this, we already have a file
* descriptor and address. This messaging port is already connected, and connect() should not be
* called.
*/
ASIOMessagingPort(int fd, SockAddr farEnd);
/**
* This is the "Egress Constructor", used by the dbclient. This messaging port is not connected
* to any remote endpoint. In order to do any communications, the connect() method must be
* called successfully.
*/
ASIOMessagingPort(Milliseconds timeout, logger::LogSeverity logLevel);
~ASIOMessagingPort() override;
void setTimeout(Milliseconds millis) override;
void shutdown() override;
bool call(Message& toSend, Message& response) override;
bool recv(Message& m) override;
void reply(Message& received, Message& response, int32_t responseToMsgId) override;
void reply(Message& received, Message& response) override;
void say(Message& toSend, int responseTo = 0) override;
void say(const Message& toSend) override;
void send(const char* data, int len, const char*) override;
void send(const std::vector<std::pair<char*, int>>& data, const char*) override;
bool connect(SockAddr& farEnd) override;
HostAndPort remote() const override;
unsigned remotePort() const override;
SockAddr remoteAddr() const override;
SockAddr localAddr() const override;
bool isStillConnected() const override;
uint64_t getSockCreationMicroSec() const override;
void setLogLevel(logger::LogSeverity logLevel) override;
void clearCounters() override;
long long getBytesIn() const override;
long long getBytesOut() const override;
void setX509PeerInfo(SSLPeerInfo x509PeerInfo) override;
const SSLPeerInfo& getX509PeerInfo() const override;
void setConnectionId(const long long connectionId) override;
long long connectionId() const override;
void setTag(const AbstractMessagingPort::Tag tag) override;
AbstractMessagingPort::Tag getTag() const override;
bool secure(SSLManagerInterface* ssl, const std::string& remoteHost) override;
private:
void _setTimerCallback();
asio::error_code _read(char* buf, std::size_t size);
asio::error_code _write(const char* buf, std::size_t size);
asio::error_code _handshake(bool isServer, const char* buf = nullptr, std::size_t size = 0);
const asio::generic::stream_protocol::socket& _getSocket() const;
asio::generic::stream_protocol::socket& _getSocket();
asio::io_service _service;
AtomicBool _inShutdown;
stdx::mutex _opInProgress;
asio::system_timer _timer;
uint64_t _creationTime;
boost::optional<Milliseconds> _timeout;
HostAndPort _remote;
bool _isEncrypted;
bool _awaitingHandshake;
SSLPeerInfo _x509PeerInfo;
long long _bytesIn;
long long _bytesOut;
logger::LogSeverity _logLevel;
long long _connectionId;
AbstractMessagingPort::Tag _tag;
#ifdef MONGO_CONFIG_SSL
boost::optional<ASIOSSLContext> _context;
asio::ssl::stream<asio::generic::stream_protocol::socket> _sslSock;
#else
asio::generic::stream_protocol::socket _sock;
#endif
};
} // namespace mongo
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