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/*
* anytun
*
* The secure anycast tunneling protocol (satp) defines a protocol used
* for communication between any combination of unicast and anycast
* tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
* mode and allows tunneling of every ETHER TYPE protocol (e.g.
* ethernet, ip, arp ...). satp directly includes cryptography and
* message authentication based on the methods used by SRTP. It is
* intended to deliver a generic, scaleable and secure solution for
* tunneling and relaying of packets of any protocol.
*
*
* Copyright (C) 2007-2009 Othmar Gsenger, Erwin Nindl,
* Christian Pointner <satp@wirdorange.org>
*
* This file is part of Anytun.
*
* Anytun is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* Anytun 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with anytun. If not, see <http://www.gnu.org/licenses/>.
*/
#include <sstream>
#include <iostream>
#include <string>
#include "connectionList.h"
#include "syncCommand.h"
#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>
#include "log.h"
#include "syncClient.h"
#include "syncTcpConnection.h"
#include "buffer.h"
#include <boost/array.hpp>
SyncClient::SyncClient(std::string hostname,std::string port)
:hostname_(hostname),port_(port)
{
}
void SyncClient::run()
{
bool connected(false);
for(;;) {
try {
boost::asio::io_service io_service;
SyncTcpConnection::proto::resolver resolver(io_service);
SyncTcpConnection::proto::resolver::query query(hostname_, port_);
SyncTcpConnection::proto::resolver::iterator endpoint_iterator = resolver.resolve(query);
SyncTcpConnection::proto::resolver::iterator end;
SyncTcpConnection::proto::socket socket(io_service);
boost::system::error_code error = boost::asio::error::host_not_found;
while(error && endpoint_iterator != end) {
socket.close();
socket.connect(*endpoint_iterator++, error);
}
if(error) {
throw boost::system::system_error(error);
}
if(!connected) {
cLog.msg(Log::PRIO_NOTICE) << "sync: connected to " << hostname_ <<":"<< port_;
}
connected=true;
readAndProcess(socket); //endless loop
} catch(std::exception& e) {
if(connected) {
cLog.msg(Log::PRIO_NOTICE) << "sync: connection to " << hostname_ <<":"<< port_<< " lost ("<< e.what() << ") retrying every 10sec";
}
connected=false;
boost::this_thread::sleep(boost::posix_time::milliseconds(10000));
}
}
}
void SyncClient::readAndProcess(SyncTcpConnection::proto::socket& socket)
{
ConnectionList& cl_(gConnectionList);
size_t message_lenght ;
for(;;) {
std::stringstream message_lenght_stream;
readExactly(socket,5,message_lenght_stream);
message_lenght_stream >> message_lenght;
std::stringstream void_stream;
readExactly(socket,1,void_stream); //skip space
std::stringstream sync_command_stream;
readExactly(socket,message_lenght, sync_command_stream);
//cLog.msg(Log::PRIO_NOTICE) << "recieved sync inforamtaion "<<tmp.str()<< std::endl;
boost::archive::text_iarchive ia(sync_command_stream);
SyncCommand scom(cl_);
ia >> scom;
}
}
void SyncClient::readExactly(SyncTcpConnection::proto::socket& socket,size_t toread, std::iostream& result)
{
size_t hasread = 0;
while(toread > hasread) {
//TODO read bigger buffers
boost::array<char, 1> buf;
boost::system::error_code error;
size_t len = socket.read_some(boost::asio::buffer(buf), error);
if(error == boost::asio::error::eof) {
break; // Connection closed cleanly by peer.
} else if(error) {
throw boost::system::system_error(error); // Some other error.
}
//for (size_t pos=0; pos<len; pos++)
result<<buf[0];
hasread+=len;
}
}
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