ReactOS 0.4.15-dev-5666-gc548b97
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
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
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
75void
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;
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
126void
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
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
171 {
172 in->end = in->p;
173 in->p = in->data;
174 channel->process(This, in);
175 }
176 }
177}
char * strncpy(char *DstString, const char *SrcString, ACPI_SIZE Count)
Definition: utclib.c:427
VCHANNEL * channel_register(char *name, uint32 flags, void(*callback)(STREAM))
Definition: channels.c:46
STREAM channel_init(VCHANNEL *channel, uint32 length)
Definition: channels.c:69
#define CHANNEL_FLAG_LAST
Definition: channels.c:26
#define CHANNEL_CHUNK_LENGTH
Definition: channels.c:24
#define CHANNEL_FLAG_FIRST
Definition: channels.c:25
#define CHANNEL_FLAG_SHOW_PROTOCOL
Definition: channels.c:27
#define MAX_CHANNELS
Definition: channels.c:23
void channel_process(STREAM s, uint16 mcs_channel)
Definition: channels.c:138
void channel_send(STREAM s, VCHANNEL *channel)
Definition: channels.c:79
#define SEC_ENCRYPT
Definition: constants.h:101
#define CHANNEL_OPTION_SHOW_PROTOCOL
Definition: constants.h:434
#define MCS_GLOBAL_CHANNEL
Definition: constants.h:87
#define s_mark_end(s)
Definition: parse.h:41
#define out_uint32_le(s, v)
Definition: parse.h:59
#define s_pop_layer(s, h)
Definition: parse.h:40
#define s_push_layer(s, h, n)
Definition: parse.h:39
#define out_uint8p(s, v, n)
Definition: parse.h:93
#define in_uint32_le(s, v)
Definition: parse.h:56
void sec_send_to_channel(STREAM s, uint32 flags, uint16 channel)
Definition: secure.c:436
STREAM sec_init(uint32 flags, int maxlen)
Definition: secure.c:419
void * xrealloc(void *oldmem, size_t size)
Definition: uimain.c:736
#define DEBUG_CHANNEL(args)
Definition: rdesktop.h:159
#define MIN(x, y)
Definition: rdesktop.h:171
unsigned short uint16
Definition: types.h:30
unsigned int uint32
Definition: types.h:32
unsigned char uint8
Definition: types.h:28
#define NULL
Definition: types.h:112
GLdouble s
Definition: gl.h:2039
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: gl.h:1950
GLuint in
Definition: glext.h:9616
GLbitfield flags
Definition: glext.h:7161
GLuint GLsizei GLsizei * length
Definition: glext.h:6040
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
#define error(str)
Definition: mkdosfs.c:1605
#define memcpy(s1, s2, n)
Definition: mkisofs.h:878
static IPrintDialogCallback callback
Definition: printdlg.c:326
void(* process)(STREAM)
Definition: types.h:156
uint32 flags
Definition: types.h:154
char name[8]
Definition: types.h:153
struct stream in
Definition: types.h:155
uint16 mcs_id
Definition: types.h:152
Definition: name.c:39
Definition: parse.h:23