1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/*
* Copyright (c) 2010-2011 Thilo Cestonaro
* Licensed under the simplified BSD license.
* See Documentation/Licenses/BSD-simplified.txt for more information.
*/
#include "Swiften/Network/SOCKS5ProxiedConnection.h"
#include <iostream>
#include <boost/bind.hpp>
#include <boost/thread.hpp>
#include <math.h>
#include "Swiften/Base/Log.h"
#include "Swiften/Base/String.h"
#include "Swiften/Base/ByteArray.h"
#include "Swiften/Network/HostAddressPort.h"
namespace Swift {
SOCKS5ProxiedConnection::SOCKS5ProxiedConnection(ConnectionFactory* connectionFactory, HostAddressPort proxy)
: connectionFactory_(connectionFactory), proxy_(proxy), server_(HostAddressPort(HostAddress("0.0.0.0"), 0))
{
connected_ = false;
}
SOCKS5ProxiedConnection::~SOCKS5ProxiedConnection() {
if(connection_) {
connection_->onDataRead.disconnect(boost::bind(&SOCKS5ProxiedConnection::handleDataRead, shared_from_this(), _1));
connection_->onDisconnected.disconnect(boost::bind(&SOCKS5ProxiedConnection::handleDisconnected, shared_from_this(), _1));
}
if(connected_) {
std::cerr << "Warning: Connection was still established." << std::endl;
}
}
void SOCKS5ProxiedConnection::connect(const HostAddressPort& server) {
server_ = server;
connection_ = connectionFactory_->createConnection();
connection_->onConnectFinished.connect(boost::bind(&SOCKS5ProxiedConnection::handleConnectionConnectFinished, shared_from_this(), _1));
connection_->onDataRead.connect(boost::bind(&SOCKS5ProxiedConnection::handleDataRead, shared_from_this(), _1));
connection_->onDisconnected.connect(boost::bind(&SOCKS5ProxiedConnection::handleDisconnected, shared_from_this(), _1));
SWIFT_LOG(debug) << "Trying to connect via proxy " << proxy_.getAddress().toString() << ":" << proxy_.getPort() << std::endl;
SWIFT_LOG(debug) << "to server " << server.getAddress().toString() << ":" << server.getPort() << std::endl;
connection_->connect(proxy_);
}
void SOCKS5ProxiedConnection::listen() {
assert(false);
connection_->listen();
}
void SOCKS5ProxiedConnection::disconnect() {
connected_ = false;
if(connection_)
connection_->disconnect();
}
void SOCKS5ProxiedConnection::handleDisconnected(const boost::optional<Error>& error) {
onDisconnected(error);
}
void SOCKS5ProxiedConnection::write(const ByteArray& data) {
if(connection_)
connection_->write(data);
}
void SOCKS5ProxiedConnection::handleConnectionConnectFinished(bool error) {
connection_->onConnectFinished.disconnect(boost::bind(&SOCKS5ProxiedConnection::handleConnectionConnectFinished, shared_from_this(), _1));
if(!error) {
SWIFT_LOG(debug) << "Connection to proxy established, now connect to the server via it." << std::endl;
proxyState_ = ProxyAuthenticating;
ByteArray socksConnect;
socksConnect += 0x05; // VER = SOCKS5 = 0x05
socksConnect += 0x01; // Number of authentication methods after this byte.
socksConnect += 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)
connection_->write(socksConnect);
}
else {
onConnectFinished(true);
}
}
void SOCKS5ProxiedConnection::handleDataRead(const ByteArray& data) {
ByteArray socksConnect;
boost::asio::ip::address rawAddress = server_.getAddress().getRawAddress();
assert(rawAddress.is_v4() || rawAddress.is_v6());
if (!connected_) {
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 += 0x05; // VER = SOCKS5 = 0x05
socksConnect += 0x01; // Construct a TCP connection. (CMD)
socksConnect += 0x00; // reserved.
socksConnect += 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 += static_cast<char> (uc);
}
socksConnect += static_cast<unsigned char> (server_.getPort() >> 8); // highbyte of the port.
socksConnect += static_cast<unsigned char> (server_.getPort()); // lowbyte of the port.
connection_->write(socksConnect);
return;
}
catch(...) {
std::cerr << "exception caught" << std::endl;
}
connection_->write(socksConnect);
break;
default:
onConnectFinished(true);
break;
}
return;
}
}
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;
connected_ = true;
onConnectFinished(false);
return;
}
else {
std::cerr << "SOCKS Proxy returned an error: " << std::hex << data[1] << std::endl;
}
return;
}
}
else {
onDataRead(data);
return;
}
disconnect();
onConnectFinished(true);
}
HostAddressPort SOCKS5ProxiedConnection::getLocalAddress() const {
return connection_->getLocalAddress();
}
//namespace
}
|
Swift