aboutsummaryrefslogtreecommitdiff
path: root/nxcomp/Misc.h
blob: 23058b7b3f15593e53db4a7e4ef8ed0cc7e512a7 (plain)
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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
/**************************************************************************/
/*                                                                        */
/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
/*                                                                        */
/* NXCOMP, NX protocol compression and NX extensions to this software     */
/* are copyright of NoMachine. Redistribution and use of the present      */
/* software is allowed according to terms specified in the file LICENSE   */
/* which comes in the source distribution.                                */
/*                                                                        */
/* Check http://www.nomachine.com/licensing.html for applicability.       */
/*                                                                        */
/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
/*                                                                        */
/* All rights reserved.                                                   */
/*                                                                        */
/**************************************************************************/

#ifndef Misc_H
#define Misc_H

#include <iostream>
#include <fstream>

#include <errno.h>
#include <string.h>

using namespace std;

//
// This is MD5 length.
//

#define MD5_LENGTH          16

//
// Error handling macros.
//

#define ESET(e)  (errno = (e))
#define EGET()   (errno)
#define ESTR()   strerror(errno)

//
// TCP port offset applied to NX port specification.
//

extern const int DEFAULT_NX_PROXY_PORT_OFFSET;

//
// Default TCP port used by client proxy to listen
// to X clients and by server proxy to connect to
// remote.
//

extern const int DEFAULT_NX_PROXY_PORT;

//
// Default X display number that client
// proxy imitates.
//

extern const int DEFAULT_NX_X_PORT;

//
// Establish the port offsets for the additional
// services.
//

extern const int DEFAULT_NX_CUPS_PORT_OFFSET;
extern const int DEFAULT_NX_SMB_PORT_OFFSET;
extern const int DEFAULT_NX_MEDIA_PORT_OFFSET;
extern const int DEFAULT_NX_AUX_PORT_OFFSET;
extern const int DEFAULT_NX_HTTP_PORT_OFFSET;
extern const int DEFAULT_NX_FONT_PORT_OFFSET;

//
// Slave channels can be originated by both sides
// so they need to have different port offsets
// in the case the user runs both proxies on the
// same host.
//

extern const int DEFAULT_NX_SLAVE_PORT_CLIENT_OFFSET;
extern const int DEFAULT_NX_SLAVE_PORT_SERVER_OFFSET;

//
// Return strings containing various info.
//

const char *GetUsageInfo();
const char *GetCopyrightInfo();
const char *GetOtherCopyrightInfo();

//
// Define this if you want immediate flush of
// the log output.
//

#define FLUSH_LOGOFS

//
// Global objects providing shared functions.
//

class Auth;
class Control;
class Statistics;

extern Auth       *auth;
extern Control    *control;
extern Statistics *statistics;

//
// Log file.
//

extern ostream *logofs;

//
// Cleanup code.
//

void HandleAbort() __attribute__((noreturn));
void HandleShutdown() __attribute__((noreturn));

extern "C"
{
  void HandleCleanup(int code = 0) __attribute__((noreturn));
}

//
// Manage signal handlers.
//

void DisableSignals();
void EnableSignals();

//
// Manage timers.
//

void SetTimer(int value);
void ResetTimer();

//
// Show a dialog asking the user if he/she
// wants to close the current session. Look
// in the alerts file for the known critical
// events.
//

void HandleAlert(int code, int local);

//
// Run the callback registered by the proxy
// or the agent.
//

void KeeperCallback();
void FlushCallback(int length);

//
// Return the string literal corresponding
// the value.
//

const char *DumpSignal(int signal);
const char *DumpPolicy(int type);
const char *DumpControl(int code);
const char *DumpSession(int code);
const char *DumpAction(int type);
const char *DumpState(int type);
const char *DumpToken(int type);

//
// Print out content of buffer to log file.
// You need to define DUMP or OPCODES in
// the source to have these compiled.
//

const char *DumpOpcode(const int &opcode);
const char *DumpChecksum(const void *checksum);

void DumpData(const unsigned char *data, unsigned int length);
void DumpHexData(const unsigned char *data, unsigned int length);
void DumpChecksum(const unsigned char *data, unsigned int length);
void DumpBlockChecksums(const unsigned char *data, unsigned int length,
                            unsigned int block);

//
// Defines logofs_flush as an empty string to
// avoid calling the corresponding ostream's
// flush() function.
//

#ifdef FLUSH_LOGOFS

#define logofs_flush "" ; logofs -> flush()

#else

#define logofs_flush ""

#endif

//
// Is the host where local proxy is running
// big-endian?
//

extern int _hostBigEndian;
extern int _storeBigEndian;

inline void setHostBigEndian(int flag)
{
  _hostBigEndian = flag;
}

inline int hostBigEndian()
{
  return _hostBigEndian;
}

inline int storeBigEndian()
{
  return _storeBigEndian;
}

extern const unsigned int IntMask[33];

unsigned int GetUINT(unsigned const char *buffer, int bigEndian);
unsigned int GetULONG(unsigned const char *buffer, int bigEndian);
void PutUINT(unsigned int value, unsigned char *buffer, int bigEndian);
void PutULONG(unsigned int value, unsigned char *buffer, int bigEndian);

inline void CleanData(unsigned char *buffer, int size)
{
  unsigned char *end = buffer + size;

  while (buffer < end)
  {
    *buffer++ = 0x00;
  }
}
  
int CheckData(istream *fs);
int CheckData(ostream *fs);
int PutData(ostream *fs, const unsigned char *buffer, int size);
int GetData(istream *fs, unsigned char *buffer, int size);
int FlushData(ostream *fs);

unsigned int RoundUp2(unsigned int x);
unsigned int RoundUp4(unsigned int x);
unsigned int RoundUp8(unsigned int x);

#endif /* Misc_H */