1 | /* -*- c-basic-offset: 8 -*-
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2 | rdesktop: A Remote Desktop Protocol client.
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3 | Protocol services - RDP5 short form PDU processing
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4 | Copyright (C) Matthew Chapman 1999-2007
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5 | Copyright (C) Erik Forsberg 2003-2007
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6 |
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7 | This program is free software; you can redistribute it and/or modify
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8 | it under the terms of the GNU General Public License as published by
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9 | the Free Software Foundation; either version 2 of the License, or
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10 | (at your option) any later version.
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11 |
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12 | This program is distributed in the hope that it will be useful,
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13 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | GNU General Public License for more details.
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16 |
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17 | You should have received a copy of the GNU General Public License
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18 | along with this program; if not, write to the Free Software
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19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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20 | */
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21 |
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22 | #include "rdesktop.h"
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23 |
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24 | extern uint8 *g_next_packet;
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25 |
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26 | extern RDPCOMP g_mppc_dict;
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27 |
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28 | void
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29 | rdp5_process(STREAM s)
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30 | {
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31 | uint16 length, count, x, y;
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32 | uint8 type, ctype;
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33 | uint8 *next;
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34 |
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35 | uint32 roff, rlen;
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36 | struct stream *ns = &(g_mppc_dict.ns);
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37 | struct stream *ts;
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38 |
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39 | #if 0
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40 | printf("RDP5 data:\n");
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41 | hexdump(s->p, s->end - s->p);
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42 | #endif
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43 |
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44 | ui_begin_update();
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45 | while (s->p < s->end)
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46 | {
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47 | in_uint8(s, type);
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48 | if (type & RDP5_COMPRESSED)
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49 | {
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50 | in_uint8(s, ctype);
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51 | in_uint16_le(s, length);
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52 | type ^= RDP5_COMPRESSED;
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53 | }
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54 | else
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55 | {
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56 | ctype = 0;
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57 | in_uint16_le(s, length);
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58 | }
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59 | g_next_packet = next = s->p + length;
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60 |
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61 | if (ctype & RDP_MPPC_COMPRESSED)
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62 | {
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63 | if (mppc_expand(s->p, length, ctype, &roff, &rlen) == -1)
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64 | error("error while decompressing packet\n");
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65 |
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66 | /* allocate memory and copy the uncompressed data into the temporary stream */
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67 | ns->data = (uint8 *) xrealloc(ns->data, rlen);
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68 |
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69 | memcpy((ns->data), (unsigned char *) (g_mppc_dict.hist + roff), rlen);
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70 |
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71 | ns->size = rlen;
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72 | ns->end = (ns->data + ns->size);
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73 | ns->p = ns->data;
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74 | ns->rdp_hdr = ns->p;
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75 |
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76 | ts = ns;
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77 | }
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78 | else
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79 | ts = s;
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80 |
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81 | switch (type)
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82 | {
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83 | case 0: /* update orders */
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84 | in_uint16_le(ts, count);
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85 | process_orders(ts, count);
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86 | break;
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87 | case 1: /* update bitmap */
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88 | in_uint8s(ts, 2); /* part length */
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89 | process_bitmap_updates(ts);
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90 | break;
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91 | case 2: /* update palette */
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92 | in_uint8s(ts, 2); /* uint16 = 2 */
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93 | process_palette(ts);
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94 | break;
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95 | case 3: /* update synchronize */
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96 | break;
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97 | case 5: /* null pointer */
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98 | ui_set_null_cursor();
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99 | break;
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100 | case 6: /* default pointer */
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101 | break;
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102 | case 8: /* pointer position */
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103 | in_uint16_le(ts, x);
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104 | in_uint16_le(ts, y);
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105 | if (s_check(ts))
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106 | ui_move_pointer(x, y);
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107 | break;
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108 | case 9: /* color pointer */
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109 | process_colour_pointer_pdu(ts);
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110 | break;
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111 | case 10: /* cached pointer */
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112 | process_cached_pointer_pdu(ts);
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113 | break;
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114 | default:
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115 | unimpl("RDP5 opcode %d\n", type);
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116 | }
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117 |
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118 | s->p = next;
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119 | }
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120 | ui_end_update();
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121 | }
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