source: vbox/trunk/src/VBox/RDP/client-1.8.3/rdp5.c@ 56300

/* -*- c-basic-offset: 8 -*-
   rdesktop: A Remote Desktop Protocol client.
   Protocol services - RDP5 short form PDU processing
   Copyright (C) Matthew Chapman <matthewc.unsw.edu.au> 1999-2008
   Copyright 2003-2008 Erik Forsberg <[email protected]> for Cendio AB

   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 3 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, see <http://www.gnu.org/licenses/>.
*/

/*
 * Oracle GPL Disclaimer: For the avoidance of doubt, except that if any license choice
 * other than GPL or LGPL is available it will apply instead, Oracle elects to use only
 * the General Public License version 2 (GPLv2) at this time for any software where
 * a choice of GPL license versions is made available with the language indicating
 * that GPLv2 or any later version may be used, or where a choice of which version
 * of the GPL is applied is otherwise unspecified.
 */

#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 & RDP5_COMPRESSED)
                {
                        in_uint8(s, ctype);
                        in_uint16_le(s, length);
                        type ^= RDP5_COMPRESSED;
                }
                else
                {
                        ctype = 0;
                        in_uint16_le(s, length);
                }
                g_next_packet = next = s->p + length;

                if (ctype & RDP_MPPC_COMPRESSED)
                {
                        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)
                {
                        case 0: /* update orders */
                                in_uint16_le(ts, count);
                                process_orders(ts, count);
                                break;
                        case 1: /* update bitmap */
                                in_uint8s(ts, 2);       /* part length */
                                process_bitmap_updates(ts);
                                break;
                        case 2: /* update palette */
                                in_uint8s(ts, 2);       /* uint16 = 2 */
                                process_palette(ts);
                                break;
                        case 3: /* update synchronize */
                                break;
                        case 5: /* null pointer */
                                ui_set_null_cursor();
                                break;
                        case 6: /* default pointer */
                                break;
                        case 8: /* pointer position */
                                in_uint16_le(ts, x);
                                in_uint16_le(ts, y);
                                if (s_check(ts))
                                        ui_move_pointer(x, y);
                                break;
                        case 9: /* color pointer */
                                process_colour_pointer_pdu(ts);
                                break;
                        case 10:        /* cached pointer */
                                process_cached_pointer_pdu(ts);
                                break;
                        case 11:
                                process_new_pointer_pdu(ts);
                                break;
                        default:
                                unimpl("RDP5 opcode %d\n", type);
                }

                s->p = next;
        }
        ui_end_update();
}