1// Copyright (C) 2016 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef QSOCKS5SOCKETENGINE_P_H
5#define QSOCKS5SOCKETENGINE_P_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists purely as an
12// implementation detail. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#include <QtNetwork/private/qtnetworkglobal_p.h>
19
20#include <QtNetwork/qnetworkproxy.h>
21
22#include "qabstractsocketengine_p.h"
23
24QT_REQUIRE_CONFIG(socks5);
25
26QT_BEGIN_NAMESPACE
27
28class QSocks5SocketEnginePrivate;
29
30class Q_AUTOTEST_EXPORT QSocks5SocketEngine : public QAbstractSocketEngine
31{
32 Q_OBJECT
33public:
34 QSocks5SocketEngine(QObject *parent = nullptr);
35 ~QSocks5SocketEngine();
36
37 bool initialize(QAbstractSocket::SocketType type, QAbstractSocket::NetworkLayerProtocol protocol = QAbstractSocket::IPv4Protocol) override;
38 bool initialize(qintptr socketDescriptor, QAbstractSocket::SocketState socketState = QAbstractSocket::ConnectedState) override;
39
40 void setProxy(const QNetworkProxy &networkProxy);
41
42 qintptr socketDescriptor() const override;
43
44 bool isValid() const override;
45
46 bool connectInternal();
47 bool connectToHost(const QHostAddress &address, quint16 port) override;
48 bool connectToHostByName(const QString &name, quint16 port) override;
49 bool bind(const QHostAddress &address, quint16 port) override;
50 bool listen(int backlog) override;
51 qintptr accept() override;
52 void close() override;
53
54 qint64 bytesAvailable() const override;
55
56 qint64 read(char *data, qint64 maxlen) override;
57 qint64 write(const char *data, qint64 len) override;
58
59#ifndef QT_NO_UDPSOCKET
60#ifndef QT_NO_NETWORKINTERFACE
61 bool joinMulticastGroup(const QHostAddress &groupAddress,
62 const QNetworkInterface &interface) override;
63 bool leaveMulticastGroup(const QHostAddress &groupAddress,
64 const QNetworkInterface &interface) override;
65 QNetworkInterface multicastInterface() const override;
66 bool setMulticastInterface(const QNetworkInterface &iface) override;
67#endif // QT_NO_NETWORKINTERFACE
68
69 bool hasPendingDatagrams() const override;
70 qint64 pendingDatagramSize() const override;
71#endif // QT_NO_UDPSOCKET
72
73 qint64 readDatagram(char *data, qint64 maxlen, QIpPacketHeader * = nullptr,
74 PacketHeaderOptions = WantNone) override;
75 qint64 writeDatagram(const char *data, qint64 len, const QIpPacketHeader &) override;
76 qint64 bytesToWrite() const override;
77
78 int option(SocketOption option) const override;
79 bool setOption(SocketOption option, int value) override;
80
81 bool waitForRead(QDeadlineTimer deadline = QDeadlineTimer{DefaultTimeout},
82 bool *timedOut = nullptr) override;
83 bool waitForWrite(QDeadlineTimer deadline = QDeadlineTimer{DefaultTimeout},
84 bool *timedOut = nullptr) override;
85 bool waitForReadOrWrite(bool *readyToRead, bool *readyToWrite,
86 bool checkRead, bool checkWrite,
87 QDeadlineTimer deadline = QDeadlineTimer{DefaultTimeout},
88 bool *timedOut = nullptr) override;
89
90 bool isReadNotificationEnabled() const override;
91 void setReadNotificationEnabled(bool enable) override;
92 bool isWriteNotificationEnabled() const override;
93 void setWriteNotificationEnabled(bool enable) override;
94 bool isExceptionNotificationEnabled() const override;
95 void setExceptionNotificationEnabled(bool enable) override;
96
97private:
98 Q_DECLARE_PRIVATE(QSocks5SocketEngine)
99 Q_DISABLE_COPY_MOVE(QSocks5SocketEngine)
100 Q_PRIVATE_SLOT(d_func(), void _q_controlSocketConnected())
101 Q_PRIVATE_SLOT(d_func(), void _q_controlSocketReadNotification())
102 Q_PRIVATE_SLOT(d_func(), void _q_controlSocketErrorOccurred(QAbstractSocket::SocketError))
103#ifndef QT_NO_UDPSOCKET
104 Q_PRIVATE_SLOT(d_func(), void _q_udpSocketReadNotification())
105#endif
106 Q_PRIVATE_SLOT(d_func(), void _q_controlSocketBytesWritten())
107 Q_PRIVATE_SLOT(d_func(), void _q_emitPendingReadNotification())
108 Q_PRIVATE_SLOT(d_func(), void _q_emitPendingWriteNotification())
109 Q_PRIVATE_SLOT(d_func(), void _q_emitPendingConnectionNotification())
110 Q_PRIVATE_SLOT(d_func(), void _q_controlSocketDisconnected())
111 Q_PRIVATE_SLOT(d_func(), void _q_controlSocketStateChanged(QAbstractSocket::SocketState))
112
113};
114
115
116class QTcpSocket;
117
118class QSocks5Authenticator
119{
120public:
121 QSocks5Authenticator();
122 virtual ~QSocks5Authenticator();
123 virtual char methodId();
124 virtual bool beginAuthenticate(QTcpSocket *socket, bool *completed);
125 virtual bool continueAuthenticate(QTcpSocket *socket, bool *completed);
126
127 bool seal(const QByteArray &buf, QByteArray *sealedBuf);
128 bool unSeal(const QByteArray &sealedBuf, QByteArray *buf);
129 bool unSeal(QTcpSocket *sealedSocket, QByteArray *buf);
130
131 virtual QString errorString() { return QString(); }
132};
133
134class QSocks5PasswordAuthenticator : public QSocks5Authenticator
135{
136public:
137 QSocks5PasswordAuthenticator(const QString &userName, const QString &password);
138 char methodId() override;
139 bool beginAuthenticate(QTcpSocket *socket, bool *completed) override;
140 bool continueAuthenticate(QTcpSocket *socket, bool *completed) override;
141
142 QString errorString() override;
143
144private:
145 QString userName;
146 QString password;
147};
148
149struct QSocks5Data;
150struct QSocks5ConnectData;
151struct QSocks5UdpAssociateData;
152struct QSocks5BindData;
153
154class QSocks5SocketEnginePrivate : public QAbstractSocketEnginePrivate
155{
156 Q_DECLARE_PUBLIC(QSocks5SocketEngine)
157public:
158 QSocks5SocketEnginePrivate();
159 ~QSocks5SocketEnginePrivate();
160
161 enum Socks5State
162 {
163 Uninitialized = 0,
164 ConnectError,
165 AuthenticationMethodsSent,
166 Authenticating,
167 AuthenticatingError,
168 RequestMethodSent,
169 RequestError,
170 Connected,
171 UdpAssociateSuccess,
172 BindSuccess,
173 ControlSocketError,
174 SocksError,
175 HostNameLookupError
176 };
177 Socks5State socks5State;
178
179 enum Socks5Mode
180 {
181 NoMode,
182 ConnectMode,
183 BindMode,
184 UdpAssociateMode
185 };
186 Socks5Mode mode;
187
188 enum Socks5Error
189 {
190 SocksFailure = 0x01,
191 ConnectionNotAllowed = 0x02,
192 NetworkUnreachable = 0x03,
193 HostUnreachable = 0x04,
194 ConnectionRefused = 0x05,
195 TTLExpired = 0x06,
196 CommandNotSupported = 0x07,
197 AddressTypeNotSupported = 0x08,
198 LastKnownError = AddressTypeNotSupported,
199 UnknownError
200 };
201
202 void initialize(Socks5Mode socks5Mode);
203
204 void setErrorState(Socks5State state, const QString &extraMessage = QString());
205 void setErrorState(Socks5State state, Socks5Error socks5error);
206
207 void reauthenticate();
208 void parseAuthenticationMethodReply();
209 void parseAuthenticatingReply();
210 void sendRequestMethod();
211 void parseRequestMethodReply();
212 void parseNewConnection();
213
214 bool waitForConnected(QDeadlineTimer deadline, bool *timedOut);
215
216 void _q_controlSocketConnected();
217 void _q_controlSocketReadNotification();
218 void _q_controlSocketErrorOccurred(QAbstractSocket::SocketError);
219#ifndef QT_NO_UDPSOCKET
220 void _q_udpSocketReadNotification();
221#endif
222 void _q_controlSocketBytesWritten();
223 void _q_controlSocketDisconnected();
224 void _q_controlSocketStateChanged(QAbstractSocket::SocketState);
225
226 QNetworkProxy proxyInfo;
227
228 bool readNotificationEnabled, writeNotificationEnabled, exceptNotificationEnabled;
229
230 qintptr socketDescriptor;
231
232 QSocks5Data *data;
233 QSocks5ConnectData *connectData;
234#ifndef QT_NO_UDPSOCKET
235 QSocks5UdpAssociateData *udpData;
236#endif
237 QSocks5BindData *bindData;
238 QString peerName;
239 QByteArray receivedHeaderFragment;
240
241 mutable bool readNotificationActivated;
242 mutable bool writeNotificationActivated;
243
244 bool readNotificationPending;
245 void _q_emitPendingReadNotification();
246 void emitReadNotification();
247 bool writeNotificationPending;
248 void _q_emitPendingWriteNotification();
249 void emitWriteNotification();
250 bool connectionNotificationPending;
251 void _q_emitPendingConnectionNotification();
252 void emitConnectionNotification();
253};
254
255class Q_AUTOTEST_EXPORT QSocks5SocketEngineHandler : public QSocketEngineHandler
256{
257public:
258 virtual QAbstractSocketEngine *createSocketEngine(QAbstractSocket::SocketType socketType,
259 const QNetworkProxy &, QObject *parent) override;
260 virtual QAbstractSocketEngine *createSocketEngine(qintptr socketDescriptor, QObject *parent) override;
261};
262
263QT_END_NAMESPACE
264
265#endif // QSOCKS5SOCKETENGINE_H
266

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source code of qtbase/src/network/socket/qsocks5socketengine_p.h