trunk/rdesktop/cliprdr.c

/* -*- c-basic-offset: 8 -*-
   rdesktop: A Remote Desktop Protocol client.
   Protocol services - Clipboard functions
   Copyright (C) Erik Forsberg <forsberg@cendio.se> 2003
   Copyright (C) Matthew Chapman 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"

#define CLIPRDR_CONNECT                 1
#define CLIPRDR_FORMAT_ANNOUNCE         2
#define CLIPRDR_FORMAT_ACK              3
#define CLIPRDR_DATA_REQUEST            4
#define CLIPRDR_DATA_RESPONSE           5

#define CLIPRDR_REQUEST                 0
#define CLIPRDR_RESPONSE                1
#define CLIPRDR_ERROR                   2

static VCHANNEL *cliprdr_channel;

static void
cliprdr_send_packet(uint16 type, uint16 status, uint8 * data, uint32 length)
{
        STREAM s;

        DEBUG_CLIPBOARD(("CLIPRDR send: type=%d, status=%d, length=%d\n", type, status, length));

        s = channel_init(cliprdr_channel, length + 12);
        out_uint16_le(s, type);
        out_uint16_le(s, status);
        out_uint32_le(s, length);
        out_uint8p(s, data, length);
        out_uint32(s, 0);       /* pad? */
        s_mark_end(s);
        channel_send(s, cliprdr_channel);
}

/* Helper which announces our readiness to supply clipboard data
   in a single format (such as CF_TEXT) to the RDP side.
   To announce more than one format at a time, use
   cliprdr_send_native_format_announce.
 */
void
cliprdr_send_simple_native_format_announce(uint32 format)
{
        uint8 buffer[36];

        buf_out_uint32(buffer, format);
        memset(buffer + 4, 0, sizeof(buffer) - 4);      /* description */
        cliprdr_send_native_format_announce(buffer, sizeof(buffer));
}

/* Announces our readiness to supply clipboard data in multiple
   formats, each denoted by a 36-byte format descriptor of
   [ uint32 format + 32-byte description ].
 */
void
cliprdr_send_native_format_announce(uint8 * formats_data, uint32 formats_data_length)
{
        cliprdr_send_packet(CLIPRDR_FORMAT_ANNOUNCE, CLIPRDR_REQUEST, formats_data, formats_data_length);
}

void
cliprdr_send_data_request(uint32 format)
{
        uint8 buffer[4];

        buf_out_uint32(buffer, format);
        cliprdr_send_packet(CLIPRDR_DATA_REQUEST, CLIPRDR_REQUEST, buffer, sizeof(buffer));
}

void
cliprdr_send_data(uint8 * data, uint32 length)
{
        cliprdr_send_packet(CLIPRDR_DATA_RESPONSE, CLIPRDR_RESPONSE, data, length);
}

static void
cliprdr_process(STREAM s)
{
        uint16 type, status;
        uint32 length, format;
        uint8 *data;

        in_uint16_le(s, type);
        in_uint16_le(s, status);
        in_uint32_le(s, length);
        data = s->p;

        DEBUG_CLIPBOARD(("CLIPRDR recv: type=%d, status=%d, length=%d\n", type, status, length));

        if (status == CLIPRDR_ERROR)
        {
                if (type == CLIPRDR_FORMAT_ACK)
                {
                        /* FIXME: We seem to get this when we send an announce while the server is
                           still processing a paste. Try sending another announce. */
                        cliprdr_send_simple_native_format_announce(CF_TEXT);
                        return;
                }

                DEBUG_CLIPBOARD(("CLIPRDR error (type=%d)\n", type));
                return;
        }

        switch (type)
        {
                case CLIPRDR_CONNECT:
                        ui_clip_sync();
                        break;
                case CLIPRDR_FORMAT_ANNOUNCE:
                        ui_clip_format_announce(data, length);
                        cliprdr_send_packet(CLIPRDR_FORMAT_ACK, CLIPRDR_RESPONSE, NULL, 0);
                        return;
                case CLIPRDR_FORMAT_ACK:
                        break;
                case CLIPRDR_DATA_REQUEST:
                        in_uint32_le(s, format);
                        ui_clip_request_data(format);
                        break;
                case CLIPRDR_DATA_RESPONSE:
                        ui_clip_handle_data(data, length);
                        break;
                case 7: /* TODO: W2K3 SP1 sends this on connect with a value of 1 */
                        break;
                default:
                        unimpl("CLIPRDR packet type %d\n", type);
        }
}

BOOL
cliprdr_init(void)
{
        cliprdr_channel =
                channel_register("cliprdr",
                                 CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP |
                                 CHANNEL_OPTION_COMPRESS_RDP | CHANNEL_OPTION_SHOW_PROTOCOL,
                                 cliprdr_process);
        return (cliprdr_channel != NULL);
}
1	/* -- c-basic-offset: 8 --
2	rdesktop: A Remote Desktop Protocol client.
3	Protocol services - Clipboard functions
4	Copyright (C) Erik Forsberg <forsberg@cendio.se> 2003
5	Copyright (C) Matthew Chapman 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	#define CLIPRDR_CONNECT 1
25	#define CLIPRDR_FORMAT_ANNOUNCE 2
26	#define CLIPRDR_FORMAT_ACK 3
27	#define CLIPRDR_DATA_REQUEST 4
28	#define CLIPRDR_DATA_RESPONSE 5
29
30	#define CLIPRDR_REQUEST 0
31	#define CLIPRDR_RESPONSE 1
32	#define CLIPRDR_ERROR 2
33
34	static VCHANNEL *cliprdr_channel;
35
36	static void
37	cliprdr_send_packet(uint16 type, uint16 status, uint8 * data, uint32 length)
38	{
39	STREAM s;
40
41	DEBUG_CLIPBOARD(("CLIPRDR send: type=%d, status=%d, length=%d\n", type, status, length));
42
43	s = channel_init(cliprdr_channel, length + 12);
44	out_uint16_le(s, type);
45	out_uint16_le(s, status);
46	out_uint32_le(s, length);
47	out_uint8p(s, data, length);
48	out_uint32(s, 0); /* pad? */
49	s_mark_end(s);
50	channel_send(s, cliprdr_channel);
51	}
52
53	/* Helper which announces our readiness to supply clipboard data
54	in a single format (such as CF_TEXT) to the RDP side.
55	To announce more than one format at a time, use
56	cliprdr_send_native_format_announce.
57	*/
58	void
59	cliprdr_send_simple_native_format_announce(uint32 format)
60	{
61	uint8 buffer[36];
62
63	buf_out_uint32(buffer, format);
64	memset(buffer + 4, 0, sizeof(buffer) - 4); /* description */
65	cliprdr_send_native_format_announce(buffer, sizeof(buffer));
66	}
67
68	/* Announces our readiness to supply clipboard data in multiple
69	formats, each denoted by a 36-byte format descriptor of
70	[ uint32 format + 32-byte description ].
71	*/
72	void
73	cliprdr_send_native_format_announce(uint8 * formats_data, uint32 formats_data_length)
74	{
75	cliprdr_send_packet(CLIPRDR_FORMAT_ANNOUNCE, CLIPRDR_REQUEST, formats_data, formats_data_length);
76	}
77
78	void
79	cliprdr_send_data_request(uint32 format)
80	{
81	uint8 buffer[4];
82
83	buf_out_uint32(buffer, format);
84	cliprdr_send_packet(CLIPRDR_DATA_REQUEST, CLIPRDR_REQUEST, buffer, sizeof(buffer));
85	}
86
87	void
88	cliprdr_send_data(uint8 * data, uint32 length)
89	{
90	cliprdr_send_packet(CLIPRDR_DATA_RESPONSE, CLIPRDR_RESPONSE, data, length);
91	}
92
93	static void
94	cliprdr_process(STREAM s)
95	{
96	uint16 type, status;
97	uint32 length, format;
98	uint8 *data;
99
100	in_uint16_le(s, type);
101	in_uint16_le(s, status);
102	in_uint32_le(s, length);
103	data = s->p;
104
105	DEBUG_CLIPBOARD(("CLIPRDR recv: type=%d, status=%d, length=%d\n", type, status, length));
106
107	if (status == CLIPRDR_ERROR)
108	{
109	if (type == CLIPRDR_FORMAT_ACK)
110	{
111	/* FIXME: We seem to get this when we send an announce while the server is
112	still processing a paste. Try sending another announce. */
113	cliprdr_send_simple_native_format_announce(CF_TEXT);
114	return;
115	}
116
117	DEBUG_CLIPBOARD(("CLIPRDR error (type=%d)\n", type));
118	return;
119	}
120
121	switch (type)
122	{
123	case CLIPRDR_CONNECT:
124	ui_clip_sync();
125	break;
126	case CLIPRDR_FORMAT_ANNOUNCE:
127	ui_clip_format_announce(data, length);
128	cliprdr_send_packet(CLIPRDR_FORMAT_ACK, CLIPRDR_RESPONSE, NULL, 0);
129	return;
130	case CLIPRDR_FORMAT_ACK:
131	break;
132	case CLIPRDR_DATA_REQUEST:
133	in_uint32_le(s, format);
134	ui_clip_request_data(format);
135	break;
136	case CLIPRDR_DATA_RESPONSE:
137	ui_clip_handle_data(data, length);
138	break;
139	case 7: /* TODO: W2K3 SP1 sends this on connect with a value of 1 */
140	break;
141	default:
142	unimpl("CLIPRDR packet type %d\n", type);
143	}
144	}
145
146	BOOL
147	cliprdr_init(void)
148	{
149	cliprdr_channel =
150	channel_register("cliprdr",
151	CHANNEL_OPTION_INITIALIZED \| CHANNEL_OPTION_ENCRYPT_RDP \|
152	CHANNEL_OPTION_COMPRESS_RDP \| CHANNEL_OPTION_SHOW_PROTOCOL,
153	cliprdr_process);
154	return (cliprdr_channel != NULL);
155	}