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Connection.h
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Connection.h
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#ifndef __CONNECTION_H__
#define __CONNECTION_H__
/*-
* Copyright (c) 2009, Moxie Marlinspike
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of this program nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <iostream>
#include <stdint.h>
#include <openssl/ssl.h>
#include <boost/asio.hpp>
#include <boost/function.hpp>
#include <boost/shared_ptr.hpp>
#include "Cell.h"
/*
* This class implements the basic connnection functionality. It takes care
* of the TLS connection and all the reading/writing to and from the wire.
*
*/
using namespace std;
using namespace boost::asio;
typedef boost::function<void (const boost::system::error_code &error)> ConnectHandler;
class Connection {
private:
std::string host;
std::string port;
SSL_CTX *ctx;
SSL *ssl;
BIO *readBio;
BIO *writeBio;
ip::tcp::socket socket;
unsigned char readBuffer[1024];
void readFully(unsigned char *buf, int len,
ConnectHandler handler,
const boost::system::error_code err);
void writeFully(unsigned char *buf, int len, ConnectHandler handler,
const boost::system::error_code &err);
void initiateConnection(std::string &host, int port, ConnectHandler handler);
void initiateConnectionComplete(ConnectHandler handler, const boost::system::error_code& err);
void renegotiateCiphers(ConnectHandler handler, const boost::system::error_code &err);
void handshake(ConnectHandler handler, const boost::system::error_code& err);
void dummyWrite(const boost::system::error_code &error);
void readIntoBuffer(ConnectHandler handler);
void readIntoBufferComplete(ConnectHandler handler, const boost::system::error_code &err,
size_t bytesRead);
void writeFromBuffer(ConnectHandler handler);
void exchangeVersions(ConnectHandler handler, const boost::system::error_code &err);
void sentVersionComplete(ConnectHandler handler,
unsigned char* versionResponseHeader,
const boost::system::error_code &err);
void readVersionResponseComplete(ConnectHandler handler,
const boost::system::error_code &err);
void exchangeNodeInfoReceived(ConnectHandler handler,
boost::shared_ptr<Cell> remoteNodeInfo,
const boost::system::error_code &err);
void exchangeNodeInfoSent(ConnectHandler handler, const boost::system::error_code &err);
void exchangeNodeInfo(ConnectHandler handler);
void initializeSSL();
public:
Connection(io_service &service, string &host, string &port);
std::string& getRemoteNodeAddress();
ip::tcp::endpoint getLocalEndpoint();
void connect(ConnectHandler handler);
void close();
void writeCell(Cell &cell, ConnectHandler handler);
void readCell(boost::shared_ptr<Cell> cell, ConnectHandler handler);
X509* getCertificate();
STACK_OF(X509)* getCertificateChain();
~Connection();
};
#endif