| 1 |
/* -*- c-basic-offset: 8 -*- |
| 2 |
rdesktop: A Remote Desktop Protocol client. |
| 3 |
Protocol services - Multipoint Communications Service |
| 4 |
Copyright (C) Matthew Chapman 1999-2002 |
| 5 |
Copyright (C) Erik Forsberg 2003 |
| 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 |
| 18 |
along with this program; if not, write to the Free Software |
| 19 |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 |
*/ |
| 21 |
|
| 22 |
#include "rdesktop.h" |
| 23 |
|
| 24 |
extern uint8 *g_next_packet; |
| 25 |
|
| 26 |
extern RDPCOMP g_mppc_dict; |
| 27 |
|
| 28 |
void |
| 29 |
rdp5_process(STREAM s, BOOL encryption) |
| 30 |
{ |
| 31 |
uint16 length, count, x, y; |
| 32 |
uint8 type, ctype; |
| 33 |
uint8 *next; |
| 34 |
|
| 35 |
uint32 roff, rlen; |
| 36 |
struct stream *ns = &(g_mppc_dict.ns); |
| 37 |
struct stream *ts; |
| 38 |
|
| 39 |
if (encryption) |
| 40 |
{ |
| 41 |
in_uint8s(s, 8); /* signature */ |
| 42 |
sec_decrypt(s->p, s->end - s->p); |
| 43 |
} |
| 44 |
|
| 45 |
#if 0 |
| 46 |
printf("RDP5 data:\n"); |
| 47 |
hexdump(s->p, s->end - s->p); |
| 48 |
#endif |
| 49 |
|
| 50 |
ui_begin_update(); |
| 51 |
while (s->p < s->end) |
| 52 |
{ |
| 53 |
in_uint8(s, type); |
| 54 |
if (type & RDP_COMPRESSION) |
| 55 |
{ |
| 56 |
in_uint8(s, ctype); |
| 57 |
in_uint16_le(s, length); |
| 58 |
type ^= RDP_COMPRESSION; |
| 59 |
} |
| 60 |
else |
| 61 |
{ |
| 62 |
ctype = 0; |
| 63 |
in_uint16_le(s, length); |
| 64 |
} |
| 65 |
g_next_packet = next = s->p + length; |
| 66 |
|
| 67 |
if (ctype & RDP_MPPC_COMPRESSED) |
| 68 |
{ |
| 69 |
|
| 70 |
if (mppc_expand(s->p, length, ctype, &roff, &rlen) == -1) |
| 71 |
error("error while decompressing packet\n"); |
| 72 |
|
| 73 |
/* allocate memory and copy the uncompressed data into the temporary stream */ |
| 74 |
ns->data = (uint8 *) xrealloc(ns->data, rlen); |
| 75 |
|
| 76 |
memcpy((ns->data), (unsigned char *) (g_mppc_dict.hist + roff), rlen); |
| 77 |
|
| 78 |
ns->size = rlen; |
| 79 |
ns->end = (ns->data + ns->size); |
| 80 |
ns->p = ns->data; |
| 81 |
ns->rdp_hdr = ns->p; |
| 82 |
|
| 83 |
ts = ns; |
| 84 |
} |
| 85 |
else |
| 86 |
ts = s; |
| 87 |
|
| 88 |
switch (type) |
| 89 |
{ |
| 90 |
/* Thanks to Jeroen Meijer <jdmeijer at yahoo |
| 91 |
dot com> for finding out the meaning of |
| 92 |
most of the opcodes here. Especially opcode |
| 93 |
8! :) */ |
| 94 |
case 0: /* orders */ |
| 95 |
in_uint16_le(ts, count); |
| 96 |
process_orders(ts, count); |
| 97 |
break; |
| 98 |
case 1: /* bitmap update (???) */ |
| 99 |
in_uint8s(ts, 2); /* part length */ |
| 100 |
process_bitmap_updates(ts); |
| 101 |
break; |
| 102 |
case 2: /* palette */ |
| 103 |
in_uint8s(ts, 2); /* uint16 = 2 */ |
| 104 |
process_palette(ts); |
| 105 |
break; |
| 106 |
case 3: /* probably an palette with offset 3. Weird */ |
| 107 |
break; |
| 108 |
case 5: |
| 109 |
ui_set_null_cursor(); |
| 110 |
break; |
| 111 |
case 8: |
| 112 |
in_uint16_le(ts, x); |
| 113 |
in_uint16_le(ts, y); |
| 114 |
if (s_check(ts)) |
| 115 |
ui_move_pointer(x, y); |
| 116 |
break; |
| 117 |
case 9: |
| 118 |
process_colour_pointer_pdu(ts); |
| 119 |
break; |
| 120 |
case 10: |
| 121 |
process_cached_pointer_pdu(ts); |
| 122 |
break; |
| 123 |
default: |
| 124 |
unimpl("RDP5 opcode %d\n", type); |
| 125 |
} |
| 126 |
|
| 127 |
s->p = next; |
| 128 |
} |
| 129 |
ui_end_update(); |
| 130 |
} |
Parent Directory
| 
Revision Log