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
|
/*
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
xrdp: A Remote Desktop Protocol server.
Copyright (C) Jay Sorg 2004-2005
iso layer
*/
#include "xrdp.h"
/*****************************************************************************/
struct xrdp_iso* xrdp_iso_create(struct xrdp_mcs* owner)
{
struct xrdp_iso* self;
self = (struct xrdp_iso*)g_malloc(sizeof(struct xrdp_iso), 1);
self->mcs_layer = owner;
self->tcp_layer = xrdp_tcp_create(self);
return self;
}
/*****************************************************************************/
void xrdp_iso_delete(struct xrdp_iso* self)
{
if (self == 0)
return;
xrdp_tcp_delete(self->tcp_layer);
g_free(self);
}
/*****************************************************************************/
/* returns error */
int xrdp_iso_recv_msg(struct xrdp_iso* self, struct stream* s, int* code)
{
int ver;
int len;
*code = 0;
if (xrdp_tcp_recv(self->tcp_layer, s, 4) != 0)
return 1;
in_uint8(s, ver);
if (ver != 3)
return 1;
in_uint8s(s, 1);
in_uint16_be(s, len);
if (xrdp_tcp_recv(self->tcp_layer, s, len - 4) != 0)
return 1;
in_uint8s(s, 1);
in_uint8(s, *code);
if (*code == ISO_PDU_DT)
in_uint8s(s, 1)
else
in_uint8s(s, 5);
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_iso_recv(struct xrdp_iso* self, struct stream* s)
{
int code;
DEBUG((" in xrdp_iso_recv\n\r"));
if (xrdp_iso_recv_msg(self, s, &code) != 0)
return 1;
if (code != ISO_PDU_DT)
return 1;
DEBUG((" out xrdp_iso_recv\n\r"));
return 0;
}
/*****************************************************************************/
int xrdp_iso_send_msg(struct xrdp_iso* self, struct stream* s, int code)
{
if (xrdp_tcp_init(self->tcp_layer, s) != 0)
return 1;
out_uint8(s, 3);
out_uint8(s, 0);
out_uint16_be(s, 11); /* length */
out_uint8(s, 8);
out_uint8(s, code);
out_uint16_le(s, 0);
out_uint16_le(s, 0);
out_uint8(s, 0);
s_mark_end(s);
if (xrdp_tcp_send(self->tcp_layer, s) != 0)
return 1;
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_iso_incoming(struct xrdp_iso* self)
{
int code;
struct stream* s;
make_stream(s);
init_stream(s, 8192);
DEBUG((" in xrdp_iso_incoming\n\r"));
if (xrdp_iso_recv_msg(self, s, &code) != 0)
{
free_stream(s);
return 1;
}
if (code != ISO_PDU_CR)
{
free_stream(s);
return 1;
}
if (xrdp_iso_send_msg(self, s, ISO_PDU_CC) != 0)
{
free_stream(s);
return 1;
}
DEBUG((" out xrdp_iso_incoming\n\r"));
free_stream(s);
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_iso_init(struct xrdp_iso* self, struct stream* s)
{
xrdp_tcp_init(self->tcp_layer, s);
s_push_layer(s, iso_hdr, 7);
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_iso_send(struct xrdp_iso* self, struct stream* s)
{
int len;
DEBUG((" in xrdp_iso_send\n\r"));
s_pop_layer(s, iso_hdr);
len = s->end - s->p;
out_uint8(s, 3);
out_uint8(s, 0);
out_uint16_be(s, len);
out_uint8(s, 2);
out_uint8(s, ISO_PDU_DT);
out_uint8(s, 0x80);
if (xrdp_tcp_send(self->tcp_layer, s) != 0)
return 1;
DEBUG((" out xrdp_iso_send\n\r"));
return 0;
}
|
