reactos/base/applications/mstsc/rdp5.c

   1 /* -*- c-basic-offset: 8 -*-
   2    rdesktop: A Remote Desktop Protocol client.
   3    Protocol services - RDP5 short form PDU processing
   4    Copyright (C) Matthew Chapman 1999-2005
   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 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 "precomp.h"
  23
  24 extern uint8 *g_next_packet;
  25
  26 extern RDPCOMP g_mppc_dict;
  27
  28 void
  29 rdp5_process(STREAM s)
  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 0
  40         printf("RDP5 data:\n");
  41         hexdump(s->p, s->end - s->p);
  42 #endif
  43
  44         ui_begin_update();
  45         while (s->p < s->end)
  46         {
  47                 in_uint8(s, type);
  48                 if (type & RDP5_COMPRESSED)
  49                 {
  50                         in_uint8(s, ctype);
  51                         in_uint16_le(s, length);
  52                         type ^= RDP5_COMPRESSED;
  53                 }
  54                 else
  55                 {
  56                         ctype = 0;
  57                         in_uint16_le(s, length);
  58                 }
  59                 g_next_packet = next = s->p + length;
  60
  61                 if (ctype & RDP_MPPC_COMPRESSED)
  62                 {
  63                         if (mppc_expand(s->p, length, ctype, &roff, &rlen) == -1)
  64                                 error("error while decompressing packet\n");
  65
  66                         /* allocate memory and copy the uncompressed data into the temporary stream */
  67                         ns->data = (uint8 *) xrealloc(ns->data, rlen);
  68
  69                         memcpy((ns->data), (unsigned char *) (g_mppc_dict.hist + roff), rlen);
  70
  71                         ns->size = rlen;
  72                         ns->end = (ns->data + ns->size);
  73                         ns->p = ns->data;
  74                         ns->rdp_hdr = ns->p;
  75
  76                         ts = ns;
  77                 }
  78                 else
  79                         ts = s;
  80
  81                 switch (type)
  82                 {
  83                         case 0: /* update orders */
  84                                 in_uint16_le(ts, count);
  85                                 process_orders(ts, count);
  86                                 break;
  87                         case 1: /* update bitmap */
  88                                 in_uint8s(ts, 2);       /* part length */
  89                                 process_bitmap_updates(ts);
  90                                 break;
  91                         case 2: /* update palette */
  92                                 in_uint8s(ts, 2);       /* uint16 = 2 */
  93                                 process_palette(ts);
  94                                 break;
  95                         case 3: /* update synchronize */
  96                                 break;
  97                         case 5: /* null pointer */
  98                                 ui_set_null_cursor();
  99                                 break;
 100                         case 6: /* default pointer */
 101                                 break;
 102                         case 8: /* pointer position */
 103                                 in_uint16_le(ts, x);
 104                                 in_uint16_le(ts, y);
 105                                 if (s_check(ts))
 106                                         ui_move_pointer(x, y);
 107                                 break;
 108                         case 9: /* color pointer */
 109                                 process_colour_pointer_pdu(ts);
 110                                 break;
 111                         case 10:        /* cached pointer */
 112                                 process_cached_pointer_pdu(ts);
 113                                 break;
 114                         default:
 115                                 unimpl("RDP5 opcode %d\n", type);
 116                 }
 117
 118                 s->p = next;
 119         }
 120         ui_end_update();
 121 }