RDESKTOP-1-3-1/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

   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 <X11/Xlib.h>
#include <X11/Xatom.h>
#include "rdesktop.h"

extern BOOL encryption;
extern Display *display;
extern Window wnd;
extern Time last_keyrelease;

static Atom clipboard_atom, primary_atom, targets_atom, timestamp_atom;
static cliprdr_dataformat *server_formats = NULL;
static uint16 num_server_formats = 0;
static XSelectionEvent selection_event;

static void
cliprdr_print_server_formats(void) 
{
#ifdef WITH_DEBUG_CLIPBOARD
        cliprdr_dataformat *this;
        uint16 i = 0;
        this = server_formats;
        DEBUG_CLIPBOARD(("There should be %d server formats.\n", num_server_formats));
        while (NULL != this) 
        {
                DEBUG_CLIPBOARD(("Format code %d\n", this->identifier));
                i++;
                this = this->next;
        }
        DEBUG_CLIPBOARD(("There were %d server formats.\n", i));
#endif
}

void 
cliprdr_handle_SelectionNotify(void)
{
        DEBUG_CLIPBOARD(("cliprdr_handle_SelectionNotify\n"));
}

void
cliprdr_handle_SelectionClear(void)
{
        DEBUG_CLIPBOARD(("cliprdr_handle_SelectionClear\n"));
}

void print_X_error(int res) 
{
        switch(res) {
        case Success:
                DEBUG_CLIPBOARD(("Success\n"));
                break;

        case BadAtom:
                DEBUG_CLIPBOARD(("BadAtom\n"));
                break;

        case BadRequest:
                DEBUG_CLIPBOARD(("BadRequest\n"));
                break;

        case BadAlloc:
                DEBUG_CLIPBOARD(("BadAlloc\n"));
                break;

        case BadMatch:
                DEBUG_CLIPBOARD(("BadMatch\n"));
                break;

        case BadValue:
                DEBUG_CLIPBOARD(("BadValue\n"));
                break;

        case BadWindow:
                DEBUG_CLIPBOARD(("BadWindow\n"));
                break;

        default:
                DEBUG_CLIPBOARD(("Unknown X error code %d\n", res));
        }
}

static void
cliprdr_request_clipboard_data(uint32 formatcode) 
{
        STREAM s;
        s = sec_init(encryption ? SEC_ENCRYPT : 0, 24);
        out_uint32_le(s, 16);
        out_uint32_le(s, 0x13);
        out_uint16_le(s, 4);
        out_uint16_le(s, 0);
        out_uint32_le(s, 4); // Remaining length
        out_uint32_le(s, formatcode);
        out_uint32_le(s, 0); // Unknown. Garbage pad?

        s_mark_end(s);

        sec_send_to_channel(s, encryption ? SEC_ENCRYPT : 0, 1005); // FIXME: Don't hardcode channel!
}


void
cliprdr_handle_SelectionRequest(XSelectionRequestEvent *xevent) 
{

        Atom *targets;
        int res;

        XSelectionEvent xev;
        DEBUG_CLIPBOARD(("cliprdr_handle_SelectionRequest\n"));
        DEBUG_CLIPBOARD(("Requestor window id 0x%x ", 
                         (unsigned)xevent->requestor));
        if (clipboard_atom == xevent->selection) {
                DEBUG_CLIPBOARD(("wants CLIPBOARD\n"));
        } 
        if (primary_atom == xevent->selection) {
                DEBUG_CLIPBOARD(("wants PRIMARY\n"));
        }  
        DEBUG_CLIPBOARD(("Target is %s (0x%x), property is %s (0x%x)\n", 
                         XGetAtomName(display, xevent->target), 
                         (unsigned)xevent->target, 
                         XGetAtomName(display, xevent->property), 
                         (unsigned)xevent->property));

        xev.type = SelectionNotify;
        xev.serial = 0;
        xev.send_event = True;
        xev.requestor = xevent->requestor;
        xev.selection = xevent->selection;
        xev.target = xevent->target;
        xev.property = xevent->property;
        xev.time = xevent->time;

        if (targets_atom == xevent->target) 
        {
                DEBUG_CLIPBOARD(("TARGETS requested, sending list..\n"));
                targets = xmalloc(4*sizeof(Atom));
                targets[0] = xevent->target;
                targets[1] = XInternAtom(display, "TEXT", True);
                targets[2] = XInternAtom(display, "UTF8_STRING", True);
                targets[3] = XInternAtom(display, "TIMESTAMP", True);
                res = XChangeProperty(display, 
                                      xevent->requestor,
                                      xevent->property,
                                      XA_ATOM,
                                      32,
                                      PropModeAppend,
                                      (unsigned char *)targets,
                                      3);
                DEBUG_CLIPBOARD(("res after XChangeProperty is "));
                print_X_error(res);     

                res = XSendEvent(display, 
                                 xevent->requestor, 
                                 False, 
                                 NoEventMask,
                                 (XEvent *)&xev);
                return;
        } else if (timestamp_atom == xevent->target) 
        {
                DEBUG_CLIPBOARD(("TIMESTAMP requested... sending 0x%x\n",
                                 (unsigned)last_keyrelease));
                res = XChangeProperty(display, 
                                      xevent->requestor,
                                      xevent->property,
                                      XA_INTEGER,
                                      32,
                                      PropModeAppend,
                                      (unsigned char *)&last_keyrelease,
                                      1);
                res = XSendEvent(display, 
                                 xevent->requestor, 
                                 False, 
                                 NoEventMask,
                                 (XEvent *)&xev);
        } else /* Some other target */
        {
                cliprdr_request_clipboard_data(CF_TEXT);
                memcpy(&selection_event, &xev, sizeof(xev));
                /* Return and wait for data, handled by 
                   cliprdr_handle_server_data */
        }
}


static void 
cliprdr_ack_format_list(void) 
{
        STREAM s;
        s = sec_init(encryption ? SEC_ENCRYPT : 0, 20);
        out_uint32_le(s, 12);
        out_uint32_le(s, 0x13);
        out_uint16_le(s, 3);
        out_uint16_le(s, 1);
        out_uint32_le(s, 0);
        out_uint32_le(s, 0x0000c0da);

        s_mark_end(s);

        sec_send_to_channel(s, encryption ? SEC_ENCRYPT : 0, 1005); // FIXME: Don't hardcode channel!
}

                
static void
cliprdr_register_server_formats(STREAM s) 
{
        uint32 remaining_length, pad;
        uint16 num_formats;
        cliprdr_dataformat *this, *next;

        DEBUG_CLIPBOARD(("cliprdr_register_server_formats\n"));
        in_uint32_le(s, remaining_length);

        num_formats = remaining_length / 36;
        if (NULL != server_formats) {
                this = server_formats;
                next = this->next;
                while (NULL != next) {
                        xfree(this);
                        this = NULL;
                        this = next;
                        next = this->next;
                }
        } 
        this = xmalloc(sizeof(cliprdr_dataformat));
        this->next = NULL;
        server_formats = this;
        num_server_formats = num_formats;
        while (1 < num_formats) {
                in_uint32_le(s, this->identifier);
                in_uint8a(s, this->textual_description, 32);
                DEBUG_CLIPBOARD(("Stored format description with numeric id %d\n", 
                                 this->identifier));
                this-> next = xmalloc(sizeof(cliprdr_dataformat));
                this = this->next;
                num_formats--;
        }
        in_uint32_le(s, this->identifier);
        DEBUG_CLIPBOARD(("Stored format description with numeric id %d\n", this->identifier));
        in_uint8a(s, this->textual_description, 32);
        this -> next = NULL;
        in_uint32_le(s, pad);
        cliprdr_print_server_formats();
}

static void
cliprdr_select_X_clipboards(void) 
{
        XSetSelectionOwner(display, primary_atom, wnd, last_keyrelease);
        if (wnd != XGetSelectionOwner(display, primary_atom))
        {
                warning("Failed to aquire ownership of PRIMARY clipboard\n");
        }
        XSetSelectionOwner(display, clipboard_atom, wnd, CurrentTime);
        if (wnd != XGetSelectionOwner(display, clipboard_atom)) 
        {
                warning("Failed to aquire ownership of CLIPBOARD clipboard\n");
        }               
        
}

        
static void
cliprdr_send_format_announce(void) 
{
        STREAM s;
        int number_of_formats = 1;
        s = sec_init(encryption ? SEC_ENCRYPT : 0, number_of_formats*36+12+4+4);
        out_uint32_le(s, number_of_formats*36+12);
        out_uint32_le(s, 0x13);
        out_uint16_le(s, 2);
        out_uint16_le(s, 0);
        out_uint32_le(s, number_of_formats*36);
        
        out_uint32_le(s, 0xd); // FIXME: This is a rather bogus unicode text description..
        //      rdp_out_unistr(s, "", 16);
        out_uint8s(s, 32);

        out_uint32_le(s, 0); 

        s_mark_end(s);
        sec_send_to_channel(s, encryption ? SEC_ENCRYPT : 0, 1005); // FIXME: Don't hardcode channel!
}


static void 
cliprdr_handle_first_handshake(STREAM s)
{
        uint32 remaining_length, pad;
        in_uint32_le(s, remaining_length);
        in_uint32_le(s, pad);
        DEBUG_CLIPBOARD(("Remaining length in first handshake frm server is %d, pad is %d\n", 
                         remaining_length, pad));
        cliprdr_send_format_announce();
}

void cliprdr_handle_server_data(uint32 length, STREAM s) 
{
        uint32 remaining_length;
        char *data;
        int res;
        in_uint32_le(s, remaining_length);
        data = s->p;
        res = XChangeProperty(display, 
                              selection_event.requestor,
                              selection_event.property,
                              XInternAtom(display, "STRING", False),
                              8,
                              PropModeAppend,
                              data,
                              remaining_length);

        DEBUG_CLIPBOARD(("res after XChangeProperty is "));
        print_X_error(res);     
        
        res = XSendEvent(display, 
                         selection_event.requestor, 
                         False, 
                         NoEventMask,
                         (XEvent *)&selection_event);
        
        DEBUG_CLIPBOARD(("res after XSendEvent is "));
        print_X_error(res);

}

void cliprdr_callback(STREAM s) 
{
        uint32 length, flags;
        uint16 ptype0, ptype1;
        DEBUG_CLIPBOARD(("cliprdr_callback called, clipboard data:\n"));
#ifdef WITH_DEBUG_CLIPBOARD
        hexdump(s->p, s->end - s->p);
#endif
        in_uint32_le(s, length);
        in_uint32_le(s, flags);

        DEBUG_CLIPBOARD(("length is %d, flags are %d\n", length, flags));

        if (flags & 0x03 || flags & 0x01) /* Single-write op or first-packet-of-several op */
        {
                in_uint16_le(s, ptype0);
                in_uint16_le(s, ptype1);
                DEBUG_CLIPBOARD(("ptype0 is %d, ptype1 is %d\n", ptype0, ptype1));
                if (1 == ptype0 && 0 == ptype1) {
                        cliprdr_handle_first_handshake(s);
                        return;
                } else if (3 == ptype0 && 1 == ptype1) 
                {
                        // Acknowledgment on our format announce. Do we care? Not right now.
                        // There is a strange pad in this packet that we might need some time,
                        // but probably not.
                        DEBUG_CLIPBOARD(("Received format announce ACK\n"));
                        return;

                } else if (2 == ptype0 && 0 == ptype1) 
                {
                        cliprdr_register_server_formats(s);
                        cliprdr_select_X_clipboards();
                        cliprdr_ack_format_list();
                        return;
                } else if (5 == ptype0 && 1 == ptype1) 
                {
                        cliprdr_handle_server_data(length, s);
                }
                
        }
}


void cliprdr_init(void) 
{
        primary_atom = XInternAtom(display, "PRIMARY", False);
        clipboard_atom = XInternAtom(display, "CLIPBOARD", False);
        targets_atom = XInternAtom(display, "TARGETS", True);
        timestamp_atom = XInternAtom(display, "TIMESTAMP", True);
}
1	forsberg	383	/* -- 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
6			This program is free software; you can redistribute it and/or modify
7			it under the terms of the GNU General Public License as published by
8			the Free Software Foundation; either version 2 of the License, or
9			(at your option) any later version.
10
11			This program is distributed in the hope that it will be useful,
12			but WITHOUT ANY WARRANTY; without even the implied warranty of
13			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			GNU General Public License for more details.
15
16			You should have received a copy of the GNU General Public License
17			along with this program; if not, write to the Free Software
18			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19			*/
20
21			#include <X11/Xlib.h>
22			#include <X11/Xatom.h>
23			#include "rdesktop.h"
24
25			extern BOOL encryption;
26			extern Display *display;
27			extern Window wnd;
28			extern Time last_keyrelease;
29
30			static Atom clipboard_atom, primary_atom, targets_atom, timestamp_atom;
31			static cliprdr_dataformat *server_formats = NULL;
32			static uint16 num_server_formats = 0;
33	forsberg	384	static XSelectionEvent selection_event;
34	forsberg	383
35			static void
36			cliprdr_print_server_formats(void)
37			{
38			#ifdef WITH_DEBUG_CLIPBOARD
39			cliprdr_dataformat *this;
40			uint16 i = 0;
41			this = server_formats;
42			DEBUG_CLIPBOARD(("There should be %d server formats.\n", num_server_formats));
43			while (NULL != this)
44			{
45			DEBUG_CLIPBOARD(("Format code %d\n", this->identifier));
46			i++;
47			this = this->next;
48			}
49	forsberg	384	DEBUG_CLIPBOARD(("There were %d server formats.\n", i));
50	forsberg	383	#endif
51			}
52
53			void
54			cliprdr_handle_SelectionNotify(void)
55			{
56			DEBUG_CLIPBOARD(("cliprdr_handle_SelectionNotify\n"));
57			}
58
59			void
60			cliprdr_handle_SelectionClear(void)
61			{
62			DEBUG_CLIPBOARD(("cliprdr_handle_SelectionClear\n"));
63			}
64
65			void print_X_error(int res)
66			{
67			switch(res) {
68			case Success:
69			DEBUG_CLIPBOARD(("Success\n"));
70			break;
71
72			case BadAtom:
73			DEBUG_CLIPBOARD(("BadAtom\n"));
74			break;
75
76			case BadRequest:
77			DEBUG_CLIPBOARD(("BadRequest\n"));
78			break;
79
80			case BadAlloc:
81			DEBUG_CLIPBOARD(("BadAlloc\n"));
82			break;
83
84			case BadMatch:
85			DEBUG_CLIPBOARD(("BadMatch\n"));
86			break;
87
88			case BadValue:
89			DEBUG_CLIPBOARD(("BadValue\n"));
90			break;
91
92			case BadWindow:
93	forsberg	384	DEBUG_CLIPBOARD(("BadWindow\n"));
94	forsberg	383	break;
95
96			default:
97			DEBUG_CLIPBOARD(("Unknown X error code %d\n", res));
98			}
99			}
100
101	forsberg	384	static void
102			cliprdr_request_clipboard_data(uint32 formatcode)
103			{
104			STREAM s;
105			s = sec_init(encryption ? SEC_ENCRYPT : 0, 24);
106			out_uint32_le(s, 16);
107			out_uint32_le(s, 0x13);
108			out_uint16_le(s, 4);
109			out_uint16_le(s, 0);
110			out_uint32_le(s, 4); // Remaining length
111			out_uint32_le(s, formatcode);
112			out_uint32_le(s, 0); // Unknown. Garbage pad?
113
114			s_mark_end(s);
115
116			sec_send_to_channel(s, encryption ? SEC_ENCRYPT : 0, 1005); // FIXME: Don't hardcode channel!
117			}
118
119
120	forsberg	383	void
121			cliprdr_handle_SelectionRequest(XSelectionRequestEvent *xevent)
122			{
123
124			Atom *targets;
125			int res;
126
127			XSelectionEvent xev;
128			DEBUG_CLIPBOARD(("cliprdr_handle_SelectionRequest\n"));
129	forsberg	384	DEBUG_CLIPBOARD(("Requestor window id 0x%x ",
130			(unsigned)xevent->requestor));
131	forsberg	383	if (clipboard_atom == xevent->selection) {
132			DEBUG_CLIPBOARD(("wants CLIPBOARD\n"));
133			}
134			if (primary_atom == xevent->selection) {
135			DEBUG_CLIPBOARD(("wants PRIMARY\n"));
136			}
137			DEBUG_CLIPBOARD(("Target is %s (0x%x), property is %s (0x%x)\n",
138			XGetAtomName(display, xevent->target),
139	forsberg	384	(unsigned)xevent->target,
140	forsberg	383	XGetAtomName(display, xevent->property),
141	forsberg	384	(unsigned)xevent->property));
142	forsberg	383
143			xev.type = SelectionNotify;
144			xev.serial = 0;
145			xev.send_event = True;
146			xev.requestor = xevent->requestor;
147			xev.selection = xevent->selection;
148			xev.target = xevent->target;
149			xev.property = xevent->property;
150			xev.time = xevent->time;
151
152			if (targets_atom == xevent->target)
153			{
154			DEBUG_CLIPBOARD(("TARGETS requested, sending list..\n"));
155			targets = xmalloc(4*sizeof(Atom));
156			targets[0] = xevent->target;
157			targets[1] = XInternAtom(display, "TEXT", True);
158			targets[2] = XInternAtom(display, "UTF8_STRING", True);
159			targets[3] = XInternAtom(display, "TIMESTAMP", True);
160			res = XChangeProperty(display,
161			xevent->requestor,
162			xevent->property,
163			XA_ATOM,
164			32,
165			PropModeAppend,
166			(unsigned char *)targets,
167			3);
168			DEBUG_CLIPBOARD(("res after XChangeProperty is "));
169			print_X_error(res);
170
171			res = XSendEvent(display,
172			xevent->requestor,
173			False,
174			NoEventMask,
175			(XEvent *)&xev);
176			return;
177			} else if (timestamp_atom == xevent->target)
178			{
179			DEBUG_CLIPBOARD(("TIMESTAMP requested... sending 0x%x\n",
180	forsberg	384	(unsigned)last_keyrelease));
181	forsberg	383	res = XChangeProperty(display,
182			xevent->requestor,
183			xevent->property,
184			XA_INTEGER,
185			32,
186			PropModeAppend,
187			(unsigned char *)&last_keyrelease,
188			1);
189			res = XSendEvent(display,
190			xevent->requestor,
191			False,
192			NoEventMask,
193			(XEvent *)&xev);
194			} else /* Some other target */
195			{
196	forsberg	384	cliprdr_request_clipboard_data(CF_TEXT);
197			memcpy(&selection_event, &xev, sizeof(xev));
198			/* Return and wait for data, handled by
199			cliprdr_handle_server_data */
200			}
201			}
202	forsberg	383
203
204	forsberg	384	static void
205			cliprdr_ack_format_list(void)
206			{
207			STREAM s;
208			s = sec_init(encryption ? SEC_ENCRYPT : 0, 20);
209			out_uint32_le(s, 12);
210			out_uint32_le(s, 0x13);
211			out_uint16_le(s, 3);
212			out_uint16_le(s, 1);
213			out_uint32_le(s, 0);
214			out_uint32_le(s, 0x0000c0da);
215
216			s_mark_end(s);
217
218			sec_send_to_channel(s, encryption ? SEC_ENCRYPT : 0, 1005); // FIXME: Don't hardcode channel!
219	forsberg	383	}
220
221	forsberg	384
222	forsberg	383
223	forsberg	384
224
225	forsberg	383	static void
226			cliprdr_register_server_formats(STREAM s)
227			{
228			uint32 remaining_length, pad;
229			uint16 num_formats;
230			cliprdr_dataformat this, next;
231
232			DEBUG_CLIPBOARD(("cliprdr_register_server_formats\n"));
233			in_uint32_le(s, remaining_length);
234
235			num_formats = remaining_length / 36;
236			if (NULL != server_formats) {
237			this = server_formats;
238			next = this->next;
239			while (NULL != next) {
240			xfree(this);
241			this = NULL;
242			this = next;
243			next = this->next;
244			}
245			}
246			this = xmalloc(sizeof(cliprdr_dataformat));
247			this->next = NULL;
248			server_formats = this;
249			num_server_formats = num_formats;
250			while (1 < num_formats) {
251			in_uint32_le(s, this->identifier);
252			in_uint8a(s, this->textual_description, 32);
253	forsberg	384	DEBUG_CLIPBOARD(("Stored format description with numeric id %d\n",
254			this->identifier));
255	forsberg	383	this-> next = xmalloc(sizeof(cliprdr_dataformat));
256			this = this->next;
257			num_formats--;
258			}
259			in_uint32_le(s, this->identifier);
260			DEBUG_CLIPBOARD(("Stored format description with numeric id %d\n", this->identifier));
261			in_uint8a(s, this->textual_description, 32);
262			this -> next = NULL;
263			in_uint32_le(s, pad);
264			cliprdr_print_server_formats();
265			}
266
267			static void
268			cliprdr_select_X_clipboards(void)
269			{
270			XSetSelectionOwner(display, primary_atom, wnd, last_keyrelease);
271			if (wnd != XGetSelectionOwner(display, primary_atom))
272			{
273			warning("Failed to aquire ownership of PRIMARY clipboard\n");
274			}
275			XSetSelectionOwner(display, clipboard_atom, wnd, CurrentTime);
276			if (wnd != XGetSelectionOwner(display, clipboard_atom))
277			{
278			warning("Failed to aquire ownership of CLIPBOARD clipboard\n");
279			}
280
281			}
282
283	forsberg	384
284
285	forsberg	383	static void
286			cliprdr_send_format_announce(void)
287			{
288			STREAM s;
289			int number_of_formats = 1;
290			s = sec_init(encryption ? SEC_ENCRYPT : 0, number_of_formats*36+12+4+4);
291			out_uint32_le(s, number_of_formats*36+12);
292			out_uint32_le(s, 0x13);
293			out_uint16_le(s, 2);
294			out_uint16_le(s, 0);
295			out_uint32_le(s, number_of_formats*36);
296
297			out_uint32_le(s, 0xd); // FIXME: This is a rather bogus unicode text description..
298			// rdp_out_unistr(s, "", 16);
299			out_uint8s(s, 32);
300
301			out_uint32_le(s, 0);
302
303			s_mark_end(s);
304			sec_send_to_channel(s, encryption ? SEC_ENCRYPT : 0, 1005); // FIXME: Don't hardcode channel!
305			}
306
307	forsberg	384
308	forsberg	383	static void
309			cliprdr_handle_first_handshake(STREAM s)
310			{
311			uint32 remaining_length, pad;
312			in_uint32_le(s, remaining_length);
313			in_uint32_le(s, pad);
314			DEBUG_CLIPBOARD(("Remaining length in first handshake frm server is %d, pad is %d\n",
315			remaining_length, pad));
316			cliprdr_send_format_announce();
317			}
318
319	forsberg	384	void cliprdr_handle_server_data(uint32 length, STREAM s)
320			{
321			uint32 remaining_length;
322			char *data;
323			int res;
324			in_uint32_le(s, remaining_length);
325			data = s->p;
326			res = XChangeProperty(display,
327			selection_event.requestor,
328			selection_event.property,
329			XInternAtom(display, "STRING", False),
330			8,
331			PropModeAppend,
332			data,
333			remaining_length);
334
335			DEBUG_CLIPBOARD(("res after XChangeProperty is "));
336			print_X_error(res);
337
338			res = XSendEvent(display,
339			selection_event.requestor,
340			False,
341			NoEventMask,
342			(XEvent *)&selection_event);
343
344			DEBUG_CLIPBOARD(("res after XSendEvent is "));
345			print_X_error(res);
346
347			}
348
349	forsberg	383	void cliprdr_callback(STREAM s)
350			{
351			uint32 length, flags;
352			uint16 ptype0, ptype1;
353			DEBUG_CLIPBOARD(("cliprdr_callback called, clipboard data:\n"));
354			#ifdef WITH_DEBUG_CLIPBOARD
355			hexdump(s->p, s->end - s->p);
356			#endif
357			in_uint32_le(s, length);
358			in_uint32_le(s, flags);
359
360			DEBUG_CLIPBOARD(("length is %d, flags are %d\n", length, flags));
361
362			if (flags & 0x03 \|\| flags & 0x01) /* Single-write op or first-packet-of-several op */
363			{
364			in_uint16_le(s, ptype0);
365			in_uint16_le(s, ptype1);
366			DEBUG_CLIPBOARD(("ptype0 is %d, ptype1 is %d\n", ptype0, ptype1));
367			if (1 == ptype0 && 0 == ptype1) {
368			cliprdr_handle_first_handshake(s);
369			return;
370			} else if (3 == ptype0 && 1 == ptype1)
371			{
372			// Acknowledgment on our format announce. Do we care? Not right now.
373			// There is a strange pad in this packet that we might need some time,
374			// but probably not.
375			DEBUG_CLIPBOARD(("Received format announce ACK\n"));
376			return;
377	forsberg	384
378	forsberg	383	} else if (2 == ptype0 && 0 == ptype1)
379			{
380			cliprdr_register_server_formats(s);
381			cliprdr_select_X_clipboards();
382	forsberg	384	cliprdr_ack_format_list();
383	forsberg	383	return;
384	forsberg	384	} else if (5 == ptype0 && 1 == ptype1)
385			{
386			cliprdr_handle_server_data(length, s);
387	forsberg	383	}
388
389			}
390			}
391
392	forsberg	384
393	forsberg	383	void cliprdr_init(void)
394			{
395			primary_atom = XInternAtom(display, "PRIMARY", False);
396			clipboard_atom = XInternAtom(display, "CLIPBOARD", False);
397			targets_atom = XInternAtom(display, "TARGETS", True);
398			timestamp_atom = XInternAtom(display, "TIMESTAMP", True);
399			}