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/*-
* 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 "ProxyShuffler.h"
#include <boost/enable_shared_from_this.hpp>
using namespace boost::asio;
ProxyShuffler::ProxyShuffler(boost::shared_ptr<ShuffleStream> socks,
boost::shared_ptr<ShuffleStream> node)
: socks(socks), node(node), closed(false)
{}
void ProxyShuffler::shuffle() {
socks->read(boost::bind(&ProxyShuffler::readComplete, shared_from_this(),
socks, node, socksReadBuffer, _1, _2));
node->read(boost::bind(&ProxyShuffler::readComplete, shared_from_this(),
node, socks, nodeReadBuffer, _1, _2));
}
void ProxyShuffler::readComplete(boost::shared_ptr<ShuffleStream> thisStream,
boost::shared_ptr<ShuffleStream> thatStream,
unsigned char* thisBuffer,
unsigned char* buf, std::size_t transferred)
{
if (closed) return;
if (transferred == -1) {
close();
return;
}
assert(transferred <= PROXY_BUF_SIZE);
memcpy(thisBuffer, buf, transferred);
thatStream->write(thisBuffer, transferred,
boost::bind(&ProxyShuffler::writeComplete, shared_from_this(),
thisStream, thatStream, thisBuffer, placeholders::error));
}
void ProxyShuffler::writeComplete(boost::shared_ptr<ShuffleStream> thisStream,
boost::shared_ptr<ShuffleStream> thatStream,
unsigned char *buf,
const boost::system::error_code &err)
{
if (closed) return;
if (err) {
close();
return;
}
thisStream->read(boost::bind(&ProxyShuffler::readComplete, shared_from_this(),
thisStream, thatStream, buf, _1, _2));
}
void ProxyShuffler::close() {
if (!closed) {
node->close();
socks->close();
closed = true;
}
}
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