1 /*
2 * Copyright © 2009 Red Hat, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Author: Peter Hutterer
24 */
25
26 /***********************************************************************
27 *
28 * Request to grab or ungrab input device.
29 *
30 */
31
32 #ifdef HAVE_DIX_CONFIG_H
33 #include <dix-config.h>
34 #endif
35
36 #include "inputstr.h" /* DeviceIntPtr */
37 #include "windowstr.h" /* window structure */
38 #include <X11/extensions/XI2.h>
39 #include <X11/extensions/XI2proto.h>
40
41 #include "exglobals.h" /* BadDevice */
42 #include "exevents.h"
43 #include "xigrabdev.h"
44 #include "inpututils.h"
45
46 int _X_COLD
SProcXIGrabDevice(ClientPtr client)47 SProcXIGrabDevice(ClientPtr client)
48 {
49 REQUEST(xXIGrabDeviceReq);
50 /*
51 * Check here for at least the length of the struct we swap, then
52 * let ProcXIGrabDevice check the full size after we swap mask_len.
53 */
54 REQUEST_AT_LEAST_SIZE(xXIGrabDeviceReq);
55
56 swaps(&stuff->length);
57 swaps(&stuff->deviceid);
58 swapl(&stuff->grab_window);
59 swapl(&stuff->cursor);
60 swapl(&stuff->time);
61 swaps(&stuff->mask_len);
62
63 return ProcXIGrabDevice(client);
64 }
65
66 int
ProcXIGrabDevice(ClientPtr client)67 ProcXIGrabDevice(ClientPtr client)
68 {
69 DeviceIntPtr dev;
70 xXIGrabDeviceReply rep;
71 int ret = Success;
72 uint8_t status;
73 GrabMask mask = { 0 };
74 int mask_len;
75 unsigned int keyboard_mode;
76 unsigned int pointer_mode;
77
78 REQUEST(xXIGrabDeviceReq);
79 REQUEST_FIXED_SIZE(xXIGrabDeviceReq, ((size_t) stuff->mask_len) * 4);
80
81 ret = dixLookupDevice(&dev, stuff->deviceid, client, DixGrabAccess);
82 if (ret != Success)
83 return ret;
84
85 if (!IsMaster(dev))
86 stuff->paired_device_mode = GrabModeAsync;
87
88 if (IsKeyboardDevice(dev)) {
89 keyboard_mode = stuff->grab_mode;
90 pointer_mode = stuff->paired_device_mode;
91 }
92 else {
93 keyboard_mode = stuff->paired_device_mode;
94 pointer_mode = stuff->grab_mode;
95 }
96
97 if (XICheckInvalidMaskBits(client, (unsigned char *) &stuff[1],
98 stuff->mask_len * 4) != Success)
99 return BadValue;
100
101 mask.xi2mask = xi2mask_new();
102 if (!mask.xi2mask)
103 return BadAlloc;
104
105 mask_len = min(xi2mask_mask_size(mask.xi2mask), stuff->mask_len * 4);
106 /* FIXME: I think the old code was broken here */
107 xi2mask_set_one_mask(mask.xi2mask, dev->id, (unsigned char *) &stuff[1],
108 mask_len);
109
110 ret = GrabDevice(client, dev, pointer_mode,
111 keyboard_mode,
112 stuff->grab_window,
113 stuff->owner_events,
114 stuff->time,
115 &mask, XI2, stuff->cursor, None /* confineTo */ ,
116 &status);
117
118 xi2mask_free(&mask.xi2mask);
119
120 if (ret != Success)
121 return ret;
122
123 rep = (xXIGrabDeviceReply) {
124 .repType = X_Reply,
125 .RepType = X_XIGrabDevice,
126 .sequenceNumber = client->sequence,
127 .length = 0,
128 .status = status
129 };
130
131 WriteReplyToClient(client, sizeof(rep), &rep);
132 return ret;
133 }
134
135 int _X_COLD
SProcXIUngrabDevice(ClientPtr client)136 SProcXIUngrabDevice(ClientPtr client)
137 {
138 REQUEST(xXIUngrabDeviceReq);
139 REQUEST_SIZE_MATCH(xXIUngrabDeviceReq);
140
141 swaps(&stuff->length);
142 swaps(&stuff->deviceid);
143 swapl(&stuff->time);
144
145 return ProcXIUngrabDevice(client);
146 }
147
148 int
ProcXIUngrabDevice(ClientPtr client)149 ProcXIUngrabDevice(ClientPtr client)
150 {
151 DeviceIntPtr dev;
152 GrabPtr grab;
153 int ret = Success;
154 TimeStamp time;
155
156 REQUEST(xXIUngrabDeviceReq);
157 REQUEST_SIZE_MATCH(xXIUngrabDeviceReq);
158
159 ret = dixLookupDevice(&dev, stuff->deviceid, client, DixGetAttrAccess);
160 if (ret != Success)
161 return ret;
162
163 grab = dev->deviceGrab.grab;
164
165 time = ClientTimeToServerTime(stuff->time);
166 if ((CompareTimeStamps(time, currentTime) != LATER) &&
167 (CompareTimeStamps(time, dev->deviceGrab.grabTime) != EARLIER) &&
168 (grab) && SameClient(grab, client) && grab->grabtype == XI2)
169 (*dev->deviceGrab.DeactivateGrab) (dev);
170
171 return Success;
172 }
173
174 void _X_COLD
SRepXIGrabDevice(ClientPtr client,int size,xXIGrabDeviceReply * rep)175 SRepXIGrabDevice(ClientPtr client, int size, xXIGrabDeviceReply * rep)
176 {
177 swaps(&rep->sequenceNumber);
178 swapl(&rep->length);
179 WriteToClient(client, size, rep);
180 }
181