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/*
* Copyright (c) 2010-2011 Thilo Cestonaro
* Licensed under the simplified BSD license.
* See Documentation/Licenses/BSD-simplified.txt for more information.
*/
/*
* Copyright (c) 2014-2018 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swiften/Network/SOCKS5ProxiedConnection.h>
#include <boost/bind.hpp>
#include <Swiften/Base/ByteArray.h>
#include <Swiften/Base/Log.h>
#include <Swiften/Base/String.h>
#include <Swiften/Network/ConnectionFactory.h>
#include <Swiften/Network/HostAddressPort.h>
using namespace Swift;
SOCKS5ProxiedConnection::SOCKS5ProxiedConnection(
DomainNameResolver* resolver,
ConnectionFactory* connectionFactory,
TimerFactory* timerFactory,
const std::string& proxyHost,
unsigned short proxyPort) :
ProxiedConnection(resolver, connectionFactory, timerFactory, proxyHost, proxyPort),
proxyState_(Initial) {
}
void SOCKS5ProxiedConnection::initializeProxy() {
proxyState_ = ProxyAuthenticating;
SafeByteArray socksConnect;
socksConnect.push_back(0x05); // VER = SOCKS5 = 0x05
socksConnect.push_back(0x01); // Number of authentication methods after this byte.
socksConnect.push_back(0x00); // 0x00 == no authentication
// buffer.push_back(0x01); // 0x01 == GSSAPI
// buffer.push_back(0x02); // 0x02 == Username/Password
// rest see RFC 1928 (http://tools.ietf.org/html/rfc1928)
write(socksConnect);
}
void SOCKS5ProxiedConnection::handleProxyInitializeData(std::shared_ptr<SafeByteArray> data) {
SafeByteArray socksConnect;
boost::asio::ip::address rawAddress = getServer().getAddress().getRawAddress();
assert(rawAddress.is_v4() || rawAddress.is_v6());
if (proxyState_ == ProxyAuthenticating) {
SWIFT_LOG(debug) << "ProxyAuthenticating response received, reply with the connect BYTEs" << std::endl;
unsigned char choosenMethod = static_cast<unsigned char> ((*data)[1]);
if ((*data)[0] == 0x05 && choosenMethod != 0xFF) {
switch(choosenMethod) { // use the correct Method
case 0x00:
try {
proxyState_ = ProxyConnecting;
socksConnect.push_back(0x05); // VER = SOCKS5 = 0x05
socksConnect.push_back(0x01); // Construct a TCP connection. (CMD)
socksConnect.push_back(0x00); // reserved.
socksConnect.push_back(rawAddress.is_v4() ? 0x01 : 0x04); // IPv4 == 0x01, Hostname == 0x02, IPv6 == 0x04. (ATYP)
size_t size = rawAddress.is_v4() ? rawAddress.to_v4().to_bytes().size() : rawAddress.to_v6().to_bytes().size();
for (size_t s = 0; s < size; s++) {
unsigned char uc;
if(rawAddress.is_v4()) {
uc = rawAddress.to_v4().to_bytes()[s]; // the address.
}
else {
uc = rawAddress.to_v6().to_bytes()[s]; // the address.
}
socksConnect.push_back(uc);
}
socksConnect.push_back(static_cast<unsigned char> ((getServer().getPort() >> 8) & 0xFF)); // highbyte of the port.
socksConnect.push_back(static_cast<unsigned char> (getServer().getPort() & 0xFF)); // lowbyte of the port.
write(socksConnect);
return;
}
catch(...) {
SWIFT_LOG(error) << "exception caught" << std::endl;
}
write(socksConnect);
break;
default:
setProxyInitializeFinished(true);
break;
}
return;
}
setProxyInitializeFinished(false);
}
else if (proxyState_ == ProxyConnecting) {
SWIFT_LOG(debug) << "Connect response received, check if successfully." << std::endl;
SWIFT_LOG(debug) << "Errorbyte: 0x" << std::hex << static_cast<int> ((*data)[1]) << std::dec << std::endl;
/*
data.at(1) can be one of the following:
0x00 succeeded
0x01 general SOCKS server failure
0x02 connection not allowed by ruleset
0x03 Network unreachable
0x04 Host unreachable
0x05 Connection refused
0x06 TTL expired
0x07 Command not supported (CMD)
0x08 Address type not supported (ATYP)
0x09 bis 0xFF unassigned
*/
if ((*data)[0] == 0x05 && (*data)[1] == 0x0) {
SWIFT_LOG(debug) << "Successfully connected the server via the proxy." << std::endl;
setProxyInitializeFinished(true);
}
else {
SWIFT_LOG(error) << "SOCKS Proxy returned an error: " << std::hex << (*data)[1] << std::endl;
setProxyInitializeFinished(false);
}
}
}
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Swift