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 <matthewc.unsw.edu.au> 1999-2008
   5    Copyright 2003-2008 Erik Forsberg <forsberg@cendio.se> for Cendio AB
   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 3 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, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "precomp.h"
  22
  23 extern uint8 *g_next_packet;
  24
  25 extern RDPCOMP g_mppc_dict;
  26
  27 void
  28 rdp5_process(STREAM s)
  29 {
  30         uint16 length, count, x, y;
  31         uint8 type, ctype;
  32         uint8 *next;
  33
  34         uint32 roff, rlen;
  35         struct stream *ns = &(g_mppc_dict.ns);
  36         struct stream *ts;
  37
  38 #if 0
  39         printf("RDP5 data:\n");
  40         hexdump(s->p, s->end - s->p);
  41 #endif
  42
  43         ui_begin_update();
  44         while (s->p < s->end)
  45         {
  46                 in_uint8(s, type);
  47                 if (type & RDP5_COMPRESSED)
  48                 {
  49                         in_uint8(s, ctype);
  50                         in_uint16_le(s, length);
  51                         type ^= RDP5_COMPRESSED;
  52                 }
  53                 else
  54                 {
  55                         ctype = 0;
  56                         in_uint16_le(s, length);
  57                 }
  58                 g_next_packet = next = s->p + length;
  59
  60                 if (ctype & RDP_MPPC_COMPRESSED)
  61                 {
  62                         if (mppc_expand(s->p, length, ctype, &roff, &rlen) == -1)
  63                                 error("error while decompressing packet\n");
  64
  65                         /* allocate memory and copy the uncompressed data into the temporary stream */
  66                         ns->data = (uint8 *) xrealloc(ns->data, rlen);
  67
  68                         memcpy((ns->data), (unsigned char *) (g_mppc_dict.hist + roff), rlen);
  69
  70                         ns->size = rlen;
  71                         ns->end = (ns->data + ns->size);
  72                         ns->p = ns->data;
  73                         ns->rdp_hdr = ns->p;
  74
  75                         ts = ns;
  76                 }
  77                 else
  78                         ts = s;
  79
  80                 switch (type)
  81                 {
  82                         case 0: /* update orders */
  83                                 in_uint16_le(ts, count);
  84                                 process_orders(ts, count);
  85                                 break;
  86                         case 1: /* update bitmap */
  87                                 in_uint8s(ts, 2);       /* part length */
  88                                 process_bitmap_updates(ts);
  89                                 break;
  90                         case 2: /* update palette */
  91                                 in_uint8s(ts, 2);       /* uint16 = 2 */
  92                                 process_palette(ts);
  93                                 break;
  94                         case 3: /* update synchronize */
  95                                 break;
  96                         case 5: /* null pointer */
  97                                 ui_set_null_cursor();
  98                                 break;
  99                         case 6: /* default pointer */
 100                                 break;
 101                         case 8: /* pointer position */
 102                                 in_uint16_le(ts, x);
 103                                 in_uint16_le(ts, y);
 104                                 if (s_check(ts))
 105                                         ui_move_pointer(x, y);
 106                                 break;
 107                         case 9: /* color pointer */
 108                                 process_colour_pointer_pdu(ts);
 109                                 break;
 110                         case 10:        /* cached pointer */
 111                                 process_cached_pointer_pdu(ts);
 112                                 break;
 113                         case 11:
 114                                 process_new_pointer_pdu(ts);
 115                                 break;
 116                         default:
 117                                 unimpl("RDP5 opcode %d\n", type);
 118                 }
 119
 120                 s->p = next;
 121         }
 122         ui_end_update();
 123 }