trunk/rdesktop/rdp5.c

/* -*- c-basic-offset: 8 -*-
   rdesktop: A Remote Desktop Protocol client.
   Protocol services - Multipoint Communications Service
   Copyright (C) Matthew Chapman 1999-2002
   Copyright (C) Erik Forsberg 2003
   
   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 2 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, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "rdesktop.h"

extern uint8 *g_next_packet;

extern RDPCOMP g_mppc_dict;

void
rdp5_process(STREAM s, BOOL encryption)
{
        uint16 length, count, x, y;
        uint8 type, ctype;
        uint8 *next;

        uint32 roff, rlen;
        struct stream *ns = &(g_mppc_dict.ns);
        struct stream *ts;

        if (encryption)
        {
                in_uint8s(s, 8);        /* signature */
                sec_decrypt(s->p, s->end - s->p);
        }

#if 0
        printf("RDP5 data:\n");
        hexdump(s->p, s->end - s->p);
#endif

        while (s->p < s->end)
        {
                in_uint8(s, type);
                if (type & RDP_COMPRESSION)
                {
                        in_uint8(s, ctype);
                        in_uint16_le(s, length);
                        type ^= RDP_COMPRESSION;
                }
                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)
                {
                                /* Thanks to Jeroen Meijer <jdmeijer at yahoo
                                   dot com> for finding out the meaning of
                                   most of the opcodes here. Especially opcode
                                   8! :) */
                        case 0: /* orders */
                                in_uint16_le(ts, count);
                                process_orders(ts, count);
                                break;
                        case 1: /* bitmap update (???) */
                                in_uint8s(ts, 2);       /* part length */
                                process_bitmap_updates(ts);
                                break;
                        case 2: /* palette */
                                in_uint8s(ts, 2);       /* uint16 = 2 */
                                process_palette(ts);
                                break;
                        case 3: /* probably an palette with offset 3. Weird */
                                break;
                        case 5:
                                ui_set_null_cursor();
                                break;
                        case 8:
                                in_uint16_le(ts, x);
                                in_uint16_le(ts, y);
                                if (s_check(ts))
                                        ui_move_pointer(x, y);
                                break;
                        case 9:
                                process_colour_pointer_pdu(ts);
                                break;
                        case 10:
                                process_cached_pointer_pdu(ts);
                                break;
                        default:
                                unimpl("RDP5 opcode %d\n", type);
                }

                s->p = next;
        }
}
1	forsberg	343	/* -- c-basic-offset: 8 --
2			rdesktop: A Remote Desktop Protocol client.
3			Protocol services - Multipoint Communications Service
4			Copyright (C) Matthew Chapman 1999-2002
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	jsorg71	438	extern uint8 *g_next_packet;
25	forsberg	343
26	n-ki	687	extern RDPCOMP g_mppc_dict;
27
28	forsberg	343	void
29	matthewc	423	rdp5_process(STREAM s, BOOL encryption)
30	forsberg	343	{
31	forsberg	428	uint16 length, count, x, y;
32	n-ki	687	uint8 type, ctype;
33	forsberg	343	uint8 *next;
34
35	n-ki	687	uint32 roff, rlen;
36			struct stream *ns = &(g_mppc_dict.ns);
37			struct stream *ts;
38
39	forsberg	343	if (encryption)
40			{
41	matthewc	423	in_uint8s(s, 8); /* signature */
42	forsberg	343	sec_decrypt(s->p, s->end - s->p);
43			}
44
45			#if 0
46			printf("RDP5 data:\n");
47			hexdump(s->p, s->end - s->p);
48			#endif
49
50			while (s->p < s->end)
51			{
52			in_uint8(s, type);
53	n-ki	687	if (type & RDP_COMPRESSION)
54			{
55			in_uint8(s, ctype);
56			in_uint16_le(s, length);
57			type ^= RDP_COMPRESSION;
58			}
59			else
60			{
61			ctype = 0;
62			in_uint16_le(s, length);
63			}
64	jsorg71	438	g_next_packet = next = s->p + length;
65	forsberg	343
66	n-ki	687	if (ctype & RDP_MPPC_COMPRESSED)
67			{
68
69			if (mppc_expand(s->p, length, ctype, &roff, &rlen) == -1)
70			error("error while decompressing packet\n");
71
72			/* allocate memory and copy the uncompressed data into the temporary stream */
73	jsorg71	711	ns->data = (uint8 *) xrealloc(ns->data, rlen);
74	n-ki	687
75			memcpy((ns->data), (unsigned char *) (g_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	forsberg	343	switch (type)
88			{
89	astrand	435	/* Thanks to Jeroen Meijer <jdmeijer at yahoo
90			dot com> for finding out the meaning of
91			most of the opcodes here. Especially opcode
92			8! :) */
93	forsberg	343	case 0: /* orders */
94	n-ki	687	in_uint16_le(ts, count);
95			process_orders(ts, count);
96	forsberg	343	break;
97			case 1: /* bitmap update (???) */
98	n-ki	687	in_uint8s(ts, 2); /* part length */
99			process_bitmap_updates(ts);
100	forsberg	343	break;
101			case 2: /* palette */
102	n-ki	687	in_uint8s(ts, 2); /* uint16 = 2 */
103			process_palette(ts);
104	forsberg	343	break;
105	forsberg	411	case 3: /* probably an palette with offset 3. Weird */
106	forsberg	343	break;
107			case 5:
108	astrand	508	ui_set_null_cursor();
109	forsberg	343	break;
110	astrand	435	case 8:
111	n-ki	687	in_uint16_le(ts, x);
112			in_uint16_le(ts, y);
113			if (s_check(ts))
114	forsberg	428	ui_move_pointer(x, y);
115			break;
116	forsberg	343	case 9:
117	n-ki	687	process_colour_pointer_pdu(ts);
118	forsberg	343	break;
119			case 10:
120	n-ki	687	process_cached_pointer_pdu(ts);
121	forsberg	343	break;
122			default:
123			unimpl("RDP5 opcode %d\n", type);
124			}
125
126			s->p = next;
127			}
128			}