ReactOS  0.4.15-dev-489-g75a0787
channels.c
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1 /* -*- c-basic-offset: 8 -*-
2  rdesktop: A Remote Desktop Protocol client.
3  Protocol services - Virtual channels
4  Copyright (C) Erik Forsberg <forsberg@cendio.se> 2003
5  Copyright (C) Matthew Chapman 2003-2005
6 
7  This program is free software; you can redistribute it and/or modify
8  it under the terms of the GNU General Public License as published by
9  the Free Software Foundation; either version 2 of the License, or
10  (at your option) any later version.
11 
12  This program is distributed in the hope that it will be useful,
13  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  GNU General Public License for more details.
16 
17  You should have received a copy of the GNU General Public License along
18  with this program; if not, write to the Free Software Foundation, Inc.,
19  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 */
21 
22 #include "rdesktop.h"
23 
24 // FIXME: header mess
25 #if 0
26 #define CHANNEL_CHUNK_LENGTH 1600
27 #define CHANNEL_FLAG_FIRST 0x01
28 #define CHANNEL_FLAG_LAST 0x02
29 #define CHANNEL_FLAG_SHOW_PROTOCOL 0x10
30 #endif
31 
32 /* FIXME: We should use the information in TAG_SRV_CHANNELS to map RDP5
33  channels to MCS channels.
34 
35  The format of TAG_SRV_CHANNELS seems to be
36 
37  global_channel_no (uint16le)
38  number_of_other_channels (uint16le)
39  ..followed by uint16les for the other channels.
40 */
41 
42 VCHANNEL *
44 {
45  VCHANNEL *channel;
46 
47  if (!This->use_rdp5)
48  return NULL;
49 
50  if (This->num_channels >= MAX_CHANNELS)
51  {
52  error("Channel table full, increase MAX_CHANNELS\n");
53  return NULL;
54  }
55 
56  channel = &This->channels[This->num_channels];
57  channel->mcs_id = MCS_GLOBAL_CHANNEL + 1 + This->num_channels;
58  strncpy(channel->name, name, 8);
59  channel->flags = flags;
60  channel->process = callback;
61  This->num_channels++;
62  return channel;
63 }
64 
65 STREAM
67 {
68  STREAM s;
69 
70  s = sec_init(This, This->encryption ? SEC_ENCRYPT : 0, length + 8);
71  s_push_layer(s, channel_hdr, 8);
72  return s;
73 }
74 
75 void
77 {
79  uint32 thislength, remaining;
80  uint8 *data;
81 
82  /* first fragment sent in-place */
83  s_pop_layer(s, channel_hdr);
84  length = s->end - s->p - sizeof(CHANNEL_PDU_HEADER);
85 
86  DEBUG_CHANNEL(("channel_send, length = %d\n", length));
87 
88  thislength = MIN(length, CHANNEL_CHUNK_LENGTH);
89 /* Note: In the original clipboard implementation, this number was
90  1592, not 1600. However, I don't remember the reason and 1600 seems
91  to work so.. This applies only to *this* length, not the length of
92  continuation or ending packets. */
93  remaining = length - thislength;
95  if (channel->flags & CHANNEL_OPTION_SHOW_PROTOCOL)
97 
100  data = s->end = s->p + thislength;
101  DEBUG_CHANNEL(("Sending %d bytes with FLAG_FIRST\n", thislength));
102  sec_send_to_channel(This, s, This->encryption ? SEC_ENCRYPT : 0, channel->mcs_id);
103 
104  /* subsequent segments copied (otherwise would have to generate headers backwards) */
105  while (remaining > 0)
106  {
107  thislength = MIN(remaining, CHANNEL_CHUNK_LENGTH);
108  remaining -= thislength;
109  flags = (remaining == 0) ? CHANNEL_FLAG_LAST : 0;
110  if (channel->flags & CHANNEL_OPTION_SHOW_PROTOCOL)
112 
113  DEBUG_CHANNEL(("Sending %d bytes with flags %d\n", thislength, flags));
114 
115  s = sec_init(This, This->encryption ? SEC_ENCRYPT : 0, thislength + 8);
118  out_uint8p(s, data, thislength);
119  s_mark_end(s);
120  sec_send_to_channel(This, s, This->encryption ? SEC_ENCRYPT : 0, channel->mcs_id);
121 
122  data += thislength;
123  }
124 }
125 
126 void
128 {
130  uint32 thislength;
131  VCHANNEL *channel = NULL;
132  unsigned int i;
133  STREAM in;
134 
135  for (i = 0; i < This->num_channels; i++)
136  {
137  channel = &This->channels[i];
138  if (channel->mcs_id == mcs_channel)
139  break;
140  }
141 
142  if (i >= This->num_channels)
143  return;
144 
146  in_uint32_le(s, flags);
148  {
149  /* single fragment - pass straight up */
150  channel->process(This, s);
151  }
152  else
153  {
154  /* add fragment to defragmentation buffer */
155  in = &channel->in;
157  {
158  if (length > in->size)
159  {
160  in->data = (uint8 *) xrealloc(in->data, length);
161  in->size = length;
162  }
163  in->p = in->data;
164  }
165 
166  thislength = MIN(s->end - s->p, in->data + in->size - in->p);
167  memcpy(in->p, s->p, thislength);
168  in->p += thislength;
169 
170  if (flags & CHANNEL_FLAG_LAST)
171  {
172  in->end = in->p;
173  in->p = in->data;
174  channel->process(This, in);
175  }
176  }
177 }
#define out_uint8p(s, v, n)
Definition: parse.h:93
struct stream in
Definition: types.h:155
#define error(str)
Definition: mkdosfs.c:1605
unsigned int uint32
Definition: types.h:32
char * strncpy(char *DstString, const char *SrcString, ACPI_SIZE Count)
Definition: utclib.c:427
STREAM sec_init(uint32 flags, int maxlen)
Definition: secure.c:419
#define CHANNEL_CHUNK_LENGTH
Definition: channels.c:24
#define out_uint32_le(s, v)
Definition: parse.h:59
char name[8]
Definition: types.h:153
void channel_process(STREAM s, uint16 mcs_channel)
Definition: channels.c:138
#define CHANNEL_FLAG_LAST
Definition: channels.c:26
#define MAX_CHANNELS
Definition: channels.c:23
T MIN(T a, T b)
Definition: polytest.cpp:79
#define MCS_GLOBAL_CHANNEL
Definition: constants.h:87
VCHANNEL * channel_register(char *name, uint32 flags, void(*callback)(STREAM))
Definition: channels.c:46
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
void * xrealloc(void *oldmem, size_t size)
Definition: uimain.c:736
#define CHANNEL_FLAG_FIRST
Definition: channels.c:25
#define s_pop_layer(s, h)
Definition: parse.h:40
#define DEBUG_CHANNEL(args)
Definition: rdesktop.h:159
smooth NULL
Definition: ftsmooth.c:416
uint32 flags
Definition: types.h:154
#define SEC_ENCRYPT
Definition: constants.h:101
uint16 mcs_id
Definition: types.h:152
MmuTrapHandler callback[0x30]
Definition: mmuobject.c:44
void(* process)(STREAM)
Definition: types.h:156
GLenum GLuint GLenum GLsizei length
Definition: glext.h:5579
unsigned char uint8
Definition: types.h:28
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: gl.h:1950
GLbitfield flags
Definition: glext.h:7161
Definition: parse.h:22
#define CHANNEL_FLAG_SHOW_PROTOCOL
Definition: channels.c:27
#define memcpy(s1, s2, n)
Definition: mkisofs.h:878
GLdouble s
Definition: gl.h:2039
void sec_send_to_channel(STREAM s, uint32 flags, uint16 channel)
Definition: secure.c:436
#define s_push_layer(s, h, n)
Definition: parse.h:39
GLuint in
Definition: glext.h:9616
unsigned short uint16
Definition: types.h:30
Definition: name.c:38
#define s_mark_end(s)
Definition: parse.h:41
#define in_uint32_le(s, v)
Definition: parse.h:56
void channel_send(STREAM s, VCHANNEL *channel)
Definition: channels.c:79
STREAM channel_init(VCHANNEL *channel, uint32 length)
Definition: channels.c:69
#define CHANNEL_OPTION_SHOW_PROTOCOL
Definition: constants.h:434