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/* -*- c-basic-offset: 8 -*-
rdesktop: A Remote Desktop Protocol client.
Protocol services - Multipoint Communications Service
Copyright (C) Matthew Chapman 1999-2005
Copyright (C) Erik Forsberg 2003
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.
*/
#include "rdesktop.h"
extern uint8 *g_next_packet;
extern RDPCOMP g_mppc_dict;
void
rdp5_process(STREAM s)
{
uint16 length, count, x, y;
uint8 type, ctype;
uint8 *next;
uint32 roff, rlen;
struct stream *ns = &(g_mppc_dict.ns);
struct stream *ts;
#if 0
printf("RDP5 data:\n");
hexdump(s->p, s->end - s->p);
#endif
ui_begin_update();
while (s->p < s->end)
{
in_uint8(s, type);
if (type & RDP_COMPRESSION)
{
in_uint8(s, ctype);
in_uint16_le(s, length);
type ^= RDP_COMPRESSION;
}
else
{
ctype = 0;
in_uint16_le(s, length);
}
g_next_packet = next = s->p + length;
if (ctype & RDP_MPPC_COMPRESSED)
{
if (length > RDP_MPPC_DICT_SIZE)
error("error decompressed packet size exceeds max\n");
if (mppc_expand(s->p, length, ctype, &roff, &rlen) == -1)
error("error while decompressing packet\n");
/* allocate memory and copy the uncompressed data into the temporary stream */
ns->data = (uint8 *) xrealloc(ns->data, rlen);
memcpy((ns->data), (unsigned char *) (g_mppc_dict.hist + roff), rlen);
ns->size = rlen;
ns->end = (ns->data + ns->size);
ns->p = ns->data;
ns->rdp_hdr = ns->p;
ts = ns;
}
else
ts = s;
switch (type)
{
/* Thanks to Jeroen Meijer <jdmeijer at yahoo
dot com> for finding out the meaning of
most of the opcodes here. Especially opcode
8! :) */
case 0: /* orders */
in_uint16_le(ts, count);
process_orders(ts, count);
break;
case 1: /* bitmap update (???) */
in_uint8s(ts, 2); /* part length */
process_bitmap_updates(ts);
break;
case 2: /* palette */
in_uint8s(ts, 2); /* uint16 = 2 */
process_palette(ts);
break;
case 3: /* probably an palette with offset 3. Weird */
break;
case 5:
ui_set_null_cursor();
break;
case 8:
in_uint16_le(ts, x);
in_uint16_le(ts, y);
if (s_check(ts))
ui_move_pointer(x, y);
break;
case 9:
process_colour_pointer_pdu(ts);
break;
case 10:
process_cached_pointer_pdu(ts);
break;
default:
unimpl("RDP5 opcode %d\n", type);
}
s->p = next;
}
ui_end_update();
}
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