base/applications/tsclient/rdesktop/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
  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 BOOL
  25 rdp5_process(RDPCLIENT * This, STREAM s)
  26 {
  27         uint16 length, count, x, y;
  28         uint8 type, ctype;
  29         uint8 *next;
  30
  31         uint32 roff, rlen;
  32         struct stream *ns = &(This->mppc_dict.ns);
  33         struct stream *ts;
  34
  35 #if 0
  36         printf("RDP5 data:\n");
  37         hexdump(s->p, s->end - s->p);
  38 #endif
  39
  40         ui_begin_update(This);
  41         while (s->p < s->end)
  42         {
  43                 in_uint8(s, type);
  44                 if (type & RDP5_COMPRESSED)
  45                 {
  46                         in_uint8(s, ctype);
  47                         in_uint16_le(s, length);
  48                         type ^= RDP5_COMPRESSED;
  49                 }
  50                 else
  51                 {
  52                         ctype = 0;
  53                         in_uint16_le(s, length);
  54                 }
  55                 This->next_packet = next = s->p + length;
  56
  57                 if (ctype & RDP_MPPC_COMPRESSED)
  58                 {
  59                         void * p;
  60
  61                         if (mppc_expand(This, s->p, length, ctype, &roff, &rlen) == -1)
  62                                 error("error while decompressing packet\n");
  63
  64                         /* allocate memory and copy the uncompressed data into the temporary stream */
  65                         p = realloc(ns->data, rlen);
  66
  67                         if(p == NULL)
  68                         {
  69                                 This->disconnect_reason = 262;
  70                                 return False;
  71                         }
  72
  73                         ns->data = (uint8 *) p;
  74
  75                         memcpy((ns->data), (unsigned char *) (This->mppc_dict.hist + roff), rlen);
  76
  77                         ns->size = rlen;
  78                         ns->end = (ns->data + ns->size);
  79                         ns->p = ns->data;
  80                         ns->rdp_hdr = ns->p;
  81
  82                         ts = ns;
  83                 }
  84                 else
  85                         ts = s;
  86
  87                 switch (type)
  88                 {
  89                         case 0: /* update orders */
  90                                 in_uint16_le(ts, count);
  91                                 process_orders(This, ts, count);
  92                                 break;
  93                         case 1: /* update bitmap */
  94                                 in_uint8s(ts, 2);       /* part length */
  95                                 process_bitmap_updates(This, ts);
  96                                 break;
  97                         case 2: /* update palette */
  98                                 in_uint8s(ts, 2);       /* uint16 = 2 */
  99                                 process_palette(This, ts);
 100                                 break;
 101                         case 3: /* update synchronize */
 102                                 break;
 103                         case 5: /* null pointer */
 104                                 ui_set_null_cursor(This);
 105                                 break;
 106                         case 6: /* default pointer */
 107                                 break;
 108                         case 8: /* pointer position */
 109                                 in_uint16_le(ts, x);
 110                                 in_uint16_le(ts, y);
 111                                 if (s_check(ts))
 112                                         ui_move_pointer(This, x, y);
 113                                 break;
 114                         case 9: /* color pointer */
 115                                 process_colour_pointer_pdu(This, ts);
 116                                 break;
 117                         case 10:        /* cached pointer */
 118                                 process_cached_pointer_pdu(This, ts);
 119                                 break;
 120                         default:
 121                                 unimpl("RDP5 opcode %d\n", type);
 122                 }
 123
 124                 s->p = next;
 125         }
 126         ui_end_update(This);
 127         return True;
 128 }