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a09e091a JB |
1 | /* |
2 | * Copyright 2008 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 | #ifdef HAVE_DIX_CONFIG_H | |
27 | #include <dix-config.h> | |
28 | #endif | |
29 | ||
30 | #include "dixstruct.h" | |
31 | #include "windowstr.h" | |
32 | #include "exglobals.h" | |
33 | #include "exevents.h" | |
34 | #include <X11/extensions/XI2proto.h> | |
35 | #include "inpututils.h" | |
36 | ||
37 | #include "xiselectev.h" | |
38 | ||
39 | /** | |
40 | * Ruleset: | |
41 | * - if A has XIAllDevices, B may select on device X | |
42 | * - If A has XIAllDevices, B may select on XIAllMasterDevices | |
43 | * - If A has XIAllMasterDevices, B may select on device X | |
44 | * - If A has XIAllMasterDevices, B may select on XIAllDevices | |
45 | * - if A has device X, B may select on XIAllDevices/XIAllMasterDevices | |
46 | */ | |
47 | static int check_for_touch_selection_conflicts(ClientPtr B, WindowPtr win, int deviceid) | |
48 | { | |
49 | OtherInputMasks *inputMasks = wOtherInputMasks(win); | |
50 | InputClients *A = NULL; | |
51 | ||
52 | if (inputMasks) | |
53 | A = inputMasks->inputClients; | |
54 | for (; A; A = A->next) { | |
55 | DeviceIntPtr tmp; | |
56 | ||
57 | if (CLIENT_ID(A->resource) == B->index) | |
58 | continue; | |
59 | ||
60 | if (deviceid == XIAllDevices) | |
61 | tmp = inputInfo.all_devices; | |
62 | else if (deviceid == XIAllMasterDevices) | |
63 | tmp = inputInfo.all_master_devices; | |
64 | else | |
65 | dixLookupDevice(&tmp, deviceid, serverClient, DixReadAccess); | |
66 | if (!tmp) | |
67 | return BadImplementation; /* this shouldn't happen */ | |
68 | ||
69 | /* A has XIAllDevices */ | |
70 | if (xi2mask_isset_for_device(A->xi2mask, inputInfo.all_devices, XI_TouchBegin)) { | |
71 | if (deviceid == XIAllDevices) | |
72 | return BadAccess; | |
73 | } | |
74 | ||
75 | /* A has XIAllMasterDevices */ | |
76 | if (xi2mask_isset_for_device(A->xi2mask, inputInfo.all_master_devices, XI_TouchBegin)) { | |
77 | if (deviceid == XIAllMasterDevices) | |
78 | return BadAccess; | |
79 | } | |
80 | ||
81 | /* A has this device */ | |
82 | if (xi2mask_isset_for_device(A->xi2mask, tmp, XI_TouchBegin)) | |
83 | return BadAccess; | |
84 | } | |
85 | ||
86 | return Success; | |
87 | } | |
88 | ||
89 | ||
90 | /** | |
91 | * Check the given mask (in len bytes) for invalid mask bits. | |
92 | * Invalid mask bits are any bits above XI2LastEvent. | |
93 | * | |
94 | * @return BadValue if at least one invalid bit is set or Success otherwise. | |
95 | */ | |
96 | int | |
97 | XICheckInvalidMaskBits(ClientPtr client, unsigned char *mask, int len) | |
98 | { | |
99 | if (len >= XIMaskLen(XI2LASTEVENT)) { | |
100 | int i; | |
101 | ||
102 | for (i = XI2LASTEVENT + 1; i < len * 8; i++) { | |
103 | if (BitIsOn(mask, i)) { | |
104 | client->errorValue = i; | |
105 | return BadValue; | |
106 | } | |
107 | } | |
108 | } | |
109 | ||
110 | return Success; | |
111 | } | |
112 | ||
113 | int | |
114 | SProcXISelectEvents(ClientPtr client) | |
115 | { | |
116 | int i; | |
117 | xXIEventMask *evmask; | |
118 | ||
119 | REQUEST(xXISelectEventsReq); | |
120 | swaps(&stuff->length); | |
121 | REQUEST_AT_LEAST_SIZE(xXISelectEventsReq); | |
122 | swapl(&stuff->win); | |
123 | swaps(&stuff->num_masks); | |
124 | ||
125 | evmask = (xXIEventMask *) &stuff[1]; | |
126 | for (i = 0; i < stuff->num_masks; i++) { | |
127 | swaps(&evmask->deviceid); | |
128 | swaps(&evmask->mask_len); | |
129 | evmask = | |
130 | (xXIEventMask *) (((char *) &evmask[1]) + evmask->mask_len * 4); | |
131 | } | |
132 | ||
133 | return (ProcXISelectEvents(client)); | |
134 | } | |
135 | ||
136 | int | |
137 | ProcXISelectEvents(ClientPtr client) | |
138 | { | |
139 | int rc, num_masks; | |
140 | WindowPtr win; | |
141 | DeviceIntPtr dev; | |
142 | DeviceIntRec dummy; | |
143 | xXIEventMask *evmask; | |
144 | int *types = NULL; | |
145 | int len; | |
146 | ||
147 | REQUEST(xXISelectEventsReq); | |
148 | REQUEST_AT_LEAST_SIZE(xXISelectEventsReq); | |
149 | ||
150 | if (stuff->num_masks == 0) | |
151 | return BadValue; | |
152 | ||
153 | rc = dixLookupWindow(&win, stuff->win, client, DixReceiveAccess); | |
154 | if (rc != Success) | |
155 | return rc; | |
156 | ||
157 | len = sz_xXISelectEventsReq; | |
158 | ||
159 | /* check request validity */ | |
160 | evmask = (xXIEventMask *) &stuff[1]; | |
161 | num_masks = stuff->num_masks; | |
162 | while (num_masks--) { | |
163 | len += sizeof(xXIEventMask) + evmask->mask_len * 4; | |
164 | ||
165 | if (bytes_to_int32(len) > stuff->length) | |
166 | return BadLength; | |
167 | ||
168 | if (evmask->deviceid != XIAllDevices && | |
169 | evmask->deviceid != XIAllMasterDevices) | |
170 | rc = dixLookupDevice(&dev, evmask->deviceid, client, DixUseAccess); | |
171 | else { | |
172 | /* XXX: XACE here? */ | |
173 | } | |
174 | if (rc != Success) | |
175 | return rc; | |
176 | ||
177 | /* hierarchy event mask is not allowed on devices */ | |
178 | if (evmask->deviceid != XIAllDevices && evmask->mask_len >= 1) { | |
179 | unsigned char *bits = (unsigned char *) &evmask[1]; | |
180 | ||
181 | if (BitIsOn(bits, XI_HierarchyChanged)) { | |
182 | client->errorValue = XI_HierarchyChanged; | |
183 | return BadValue; | |
184 | } | |
185 | } | |
186 | ||
187 | /* Raw events may only be selected on root windows */ | |
188 | if (win->parent && evmask->mask_len >= 1) { | |
189 | unsigned char *bits = (unsigned char *) &evmask[1]; | |
190 | ||
191 | if (BitIsOn(bits, XI_RawKeyPress) || | |
192 | BitIsOn(bits, XI_RawKeyRelease) || | |
193 | BitIsOn(bits, XI_RawButtonPress) || | |
194 | BitIsOn(bits, XI_RawButtonRelease) || | |
195 | BitIsOn(bits, XI_RawMotion) || | |
196 | BitIsOn(bits, XI_RawTouchBegin) || | |
197 | BitIsOn(bits, XI_RawTouchUpdate) || | |
198 | BitIsOn(bits, XI_RawTouchEnd)) { | |
199 | client->errorValue = XI_RawKeyPress; | |
200 | return BadValue; | |
201 | } | |
202 | } | |
203 | ||
204 | if (evmask->mask_len >= 1) { | |
205 | unsigned char *bits = (unsigned char *) &evmask[1]; | |
206 | ||
207 | /* All three touch events must be selected at once */ | |
208 | if ((BitIsOn(bits, XI_TouchBegin) || | |
209 | BitIsOn(bits, XI_TouchUpdate) || | |
210 | BitIsOn(bits, XI_TouchOwnership) || | |
211 | BitIsOn(bits, XI_TouchEnd)) && | |
212 | (!BitIsOn(bits, XI_TouchBegin) || | |
213 | !BitIsOn(bits, XI_TouchUpdate) || | |
214 | !BitIsOn(bits, XI_TouchEnd))) { | |
215 | client->errorValue = XI_TouchBegin; | |
216 | return BadValue; | |
217 | } | |
218 | ||
219 | /* Only one client per window may select for touch events on the | |
220 | * same devices, including master devices. | |
221 | * XXX: This breaks if a device goes from floating to attached. */ | |
222 | if (BitIsOn(bits, XI_TouchBegin)) { | |
223 | rc = check_for_touch_selection_conflicts(client, | |
224 | win, | |
225 | evmask->deviceid); | |
226 | if (rc != Success) | |
227 | return rc; | |
228 | } | |
229 | } | |
230 | ||
231 | if (XICheckInvalidMaskBits(client, (unsigned char *) &evmask[1], | |
232 | evmask->mask_len * 4) != Success) | |
233 | return BadValue; | |
234 | ||
235 | evmask = | |
236 | (xXIEventMask *) (((unsigned char *) evmask) + | |
237 | evmask->mask_len * 4); | |
238 | evmask++; | |
239 | } | |
240 | ||
241 | if (bytes_to_int32(len) != stuff->length) | |
242 | return BadLength; | |
243 | ||
244 | /* Set masks on window */ | |
245 | evmask = (xXIEventMask *) &stuff[1]; | |
246 | num_masks = stuff->num_masks; | |
247 | while (num_masks--) { | |
248 | if (evmask->deviceid == XIAllDevices || | |
249 | evmask->deviceid == XIAllMasterDevices) { | |
250 | dummy.id = evmask->deviceid; | |
251 | dev = &dummy; | |
252 | } | |
253 | else | |
254 | dixLookupDevice(&dev, evmask->deviceid, client, DixUseAccess); | |
255 | if (XISetEventMask(dev, win, client, evmask->mask_len * 4, | |
256 | (unsigned char *) &evmask[1]) != Success) | |
257 | return BadAlloc; | |
258 | evmask = | |
259 | (xXIEventMask *) (((unsigned char *) evmask) + | |
260 | evmask->mask_len * 4); | |
261 | evmask++; | |
262 | } | |
263 | ||
264 | RecalculateDeliverableEvents(win); | |
265 | ||
266 | free(types); | |
267 | return Success; | |
268 | } | |
269 | ||
270 | int | |
271 | SProcXIGetSelectedEvents(ClientPtr client) | |
272 | { | |
273 | REQUEST(xXIGetSelectedEventsReq); | |
274 | swaps(&stuff->length); | |
275 | REQUEST_SIZE_MATCH(xXIGetSelectedEventsReq); | |
276 | swapl(&stuff->win); | |
277 | ||
278 | return (ProcXIGetSelectedEvents(client)); | |
279 | } | |
280 | ||
281 | int | |
282 | ProcXIGetSelectedEvents(ClientPtr client) | |
283 | { | |
284 | int rc, i; | |
285 | WindowPtr win; | |
286 | char *buffer = NULL; | |
287 | xXIGetSelectedEventsReply reply; | |
288 | OtherInputMasks *masks; | |
289 | InputClientsPtr others = NULL; | |
290 | xXIEventMask *evmask = NULL; | |
291 | DeviceIntPtr dev; | |
292 | ||
293 | REQUEST(xXIGetSelectedEventsReq); | |
294 | REQUEST_SIZE_MATCH(xXIGetSelectedEventsReq); | |
295 | ||
296 | rc = dixLookupWindow(&win, stuff->win, client, DixGetAttrAccess); | |
297 | if (rc != Success) | |
298 | return rc; | |
299 | ||
300 | reply = (xXIGetSelectedEventsReply) { | |
301 | .repType = X_Reply, | |
302 | .RepType = X_XIGetSelectedEvents, | |
303 | .sequenceNumber = client->sequence, | |
304 | .length = 0, | |
305 | .num_masks = 0 | |
306 | }; | |
307 | ||
308 | masks = wOtherInputMasks(win); | |
309 | if (masks) { | |
310 | for (others = wOtherInputMasks(win)->inputClients; others; | |
311 | others = others->next) { | |
312 | if (SameClient(others, client)) { | |
313 | break; | |
314 | } | |
315 | } | |
316 | } | |
317 | ||
318 | if (!others) { | |
319 | WriteReplyToClient(client, sizeof(xXIGetSelectedEventsReply), &reply); | |
320 | return Success; | |
321 | } | |
322 | ||
323 | buffer = | |
324 | calloc(MAXDEVICES, sizeof(xXIEventMask) + pad_to_int32(XI2MASKSIZE)); | |
325 | if (!buffer) | |
326 | return BadAlloc; | |
327 | ||
328 | evmask = (xXIEventMask *) buffer; | |
329 | for (i = 0; i < MAXDEVICES; i++) { | |
330 | int j; | |
331 | const unsigned char *devmask = xi2mask_get_one_mask(others->xi2mask, i); | |
332 | ||
333 | if (i > 2) { | |
334 | rc = dixLookupDevice(&dev, i, client, DixGetAttrAccess); | |
335 | if (rc != Success) | |
336 | continue; | |
337 | } | |
338 | ||
339 | for (j = xi2mask_mask_size(others->xi2mask) - 1; j >= 0; j--) { | |
340 | if (devmask[j] != 0) { | |
341 | int mask_len = (j + 4) / 4; /* j is an index, hence + 4, not + 3 */ | |
342 | ||
343 | evmask->deviceid = i; | |
344 | evmask->mask_len = mask_len; | |
345 | reply.num_masks++; | |
346 | reply.length += sizeof(xXIEventMask) / 4 + evmask->mask_len; | |
347 | ||
348 | if (client->swapped) { | |
349 | swaps(&evmask->deviceid); | |
350 | swaps(&evmask->mask_len); | |
351 | } | |
352 | ||
353 | memcpy(&evmask[1], devmask, j + 1); | |
354 | evmask = (xXIEventMask *) ((char *) evmask + | |
355 | sizeof(xXIEventMask) + mask_len * 4); | |
356 | break; | |
357 | } | |
358 | } | |
359 | } | |
360 | ||
361 | WriteReplyToClient(client, sizeof(xXIGetSelectedEventsReply), &reply); | |
362 | ||
363 | if (reply.num_masks) | |
364 | WriteToClient(client, reply.length * 4, buffer); | |
365 | ||
366 | free(buffer); | |
367 | return Success; | |
368 | } | |
369 | ||
370 | void | |
371 | SRepXIGetSelectedEvents(ClientPtr client, | |
372 | int len, xXIGetSelectedEventsReply * rep) | |
373 | { | |
374 | swaps(&rep->sequenceNumber); | |
375 | swapl(&rep->length); | |
376 | swaps(&rep->num_masks); | |
377 | WriteToClient(client, len, rep); | |
378 | } |