| 1 | /* |
| 2 | * Copyright 2007-2008 Peter Hutterer |
| 3 | * Copyright 2009 Red Hat, Inc. |
| 4 | * |
| 5 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 6 | * copy of this software and associated documentation files (the "Software"), |
| 7 | * to deal in the Software without restriction, including without limitation |
| 8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 9 | * and/or sell copies of the Software, and to permit persons to whom the |
| 10 | * Software is furnished to do so, subject to the following conditions: |
| 11 | * |
| 12 | * The above copyright notice and this permission notice (including the next |
| 13 | * paragraph) shall be included in all copies or substantial portions of the |
| 14 | * Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 21 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 22 | * DEALINGS IN THE SOFTWARE. |
| 23 | * |
| 24 | * Author: Peter Hutterer, University of South Australia, NICTA |
| 25 | */ |
| 26 | |
| 27 | /*********************************************************************** |
| 28 | * |
| 29 | * Request change in the device hierarchy. |
| 30 | * |
| 31 | */ |
| 32 | |
| 33 | #ifdef HAVE_DIX_CONFIG_H |
| 34 | #include <dix-config.h> |
| 35 | #endif |
| 36 | |
| 37 | #include <X11/X.h> /* for inputstr.h */ |
| 38 | #include <X11/Xproto.h> /* Request macro */ |
| 39 | #include "inputstr.h" /* DeviceIntPtr */ |
| 40 | #include "windowstr.h" /* window structure */ |
| 41 | #include "scrnintstr.h" /* screen structure */ |
| 42 | #include <X11/extensions/XI.h> |
| 43 | #include <X11/extensions/XI2proto.h> |
| 44 | #include <X11/extensions/geproto.h> |
| 45 | #include "extnsionst.h" |
| 46 | #include "exevents.h" |
| 47 | #include "exglobals.h" |
| 48 | #include "geext.h" |
| 49 | #include "xace.h" |
| 50 | #include "xiquerydevice.h" /* for GetDeviceUse */ |
| 51 | |
| 52 | #include "xkbsrv.h" |
| 53 | |
| 54 | #include "xichangehierarchy.h" |
| 55 | #include "xibarriers.h" |
| 56 | |
| 57 | /** |
| 58 | * Send the current state of the device hierarchy to all clients. |
| 59 | */ |
| 60 | void |
| 61 | XISendDeviceHierarchyEvent(int flags[MAXDEVICES]) |
| 62 | { |
| 63 | xXIHierarchyEvent *ev; |
| 64 | xXIHierarchyInfo *info; |
| 65 | DeviceIntRec dummyDev; |
| 66 | DeviceIntPtr dev; |
| 67 | int i; |
| 68 | |
| 69 | if (!flags) |
| 70 | return; |
| 71 | |
| 72 | ev = calloc(1, sizeof(xXIHierarchyEvent) + |
| 73 | MAXDEVICES * sizeof(xXIHierarchyInfo)); |
| 74 | if (!ev) |
| 75 | return; |
| 76 | ev->type = GenericEvent; |
| 77 | ev->extension = IReqCode; |
| 78 | ev->evtype = XI_HierarchyChanged; |
| 79 | ev->time = GetTimeInMillis(); |
| 80 | ev->flags = 0; |
| 81 | ev->num_info = inputInfo.numDevices; |
| 82 | |
| 83 | info = (xXIHierarchyInfo *) &ev[1]; |
| 84 | for (dev = inputInfo.devices; dev; dev = dev->next) { |
| 85 | info->deviceid = dev->id; |
| 86 | info->enabled = dev->enabled; |
| 87 | info->use = GetDeviceUse(dev, &info->attachment); |
| 88 | info->flags = flags[dev->id]; |
| 89 | ev->flags |= info->flags; |
| 90 | info++; |
| 91 | } |
| 92 | for (dev = inputInfo.off_devices; dev; dev = dev->next) { |
| 93 | info->deviceid = dev->id; |
| 94 | info->enabled = dev->enabled; |
| 95 | info->use = GetDeviceUse(dev, &info->attachment); |
| 96 | info->flags = flags[dev->id]; |
| 97 | ev->flags |= info->flags; |
| 98 | info++; |
| 99 | } |
| 100 | |
| 101 | for (i = 0; i < MAXDEVICES; i++) { |
| 102 | if (flags[i] & (XIMasterRemoved | XISlaveRemoved)) { |
| 103 | info->deviceid = i; |
| 104 | info->enabled = FALSE; |
| 105 | info->flags = flags[i]; |
| 106 | info->use = 0; |
| 107 | ev->flags |= info->flags; |
| 108 | ev->num_info++; |
| 109 | info++; |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | ev->length = bytes_to_int32(ev->num_info * sizeof(xXIHierarchyInfo)); |
| 114 | |
| 115 | memset(&dummyDev, 0, sizeof(dummyDev)); |
| 116 | dummyDev.id = XIAllDevices; |
| 117 | dummyDev.type = SLAVE; |
| 118 | SendEventToAllWindows(&dummyDev, (XI_HierarchyChangedMask >> 8), |
| 119 | (xEvent *) ev, 1); |
| 120 | free(ev); |
| 121 | } |
| 122 | |
| 123 | /*********************************************************************** |
| 124 | * |
| 125 | * This procedure allows a client to change the device hierarchy through |
| 126 | * adding new master devices, removing them, etc. |
| 127 | * |
| 128 | */ |
| 129 | |
| 130 | int |
| 131 | SProcXIChangeHierarchy(ClientPtr client) |
| 132 | { |
| 133 | REQUEST(xXIChangeHierarchyReq); |
| 134 | swaps(&stuff->length); |
| 135 | return (ProcXIChangeHierarchy(client)); |
| 136 | } |
| 137 | |
| 138 | static int |
| 139 | add_master(ClientPtr client, xXIAddMasterInfo * c, int flags[MAXDEVICES]) |
| 140 | { |
| 141 | DeviceIntPtr ptr, keybd, XTestptr, XTestkeybd; |
| 142 | char *name; |
| 143 | int rc; |
| 144 | |
| 145 | name = calloc(c->name_len + 1, sizeof(char)); |
| 146 | if (name == NULL) { |
| 147 | rc = BadAlloc; |
| 148 | goto unwind; |
| 149 | } |
| 150 | strncpy(name, (char *) &c[1], c->name_len); |
| 151 | |
| 152 | rc = AllocDevicePair(client, name, &ptr, &keybd, |
| 153 | CorePointerProc, CoreKeyboardProc, TRUE); |
| 154 | if (rc != Success) |
| 155 | goto unwind; |
| 156 | |
| 157 | if (!c->send_core) |
| 158 | ptr->coreEvents = keybd->coreEvents = FALSE; |
| 159 | |
| 160 | /* Allocate virtual slave devices for xtest events */ |
| 161 | rc = AllocXTestDevice(client, name, &XTestptr, &XTestkeybd, ptr, keybd); |
| 162 | if (rc != Success) { |
| 163 | DeleteInputDeviceRequest(ptr); |
| 164 | DeleteInputDeviceRequest(keybd); |
| 165 | goto unwind; |
| 166 | } |
| 167 | |
| 168 | ActivateDevice(ptr, FALSE); |
| 169 | ActivateDevice(keybd, FALSE); |
| 170 | flags[ptr->id] |= XIMasterAdded; |
| 171 | flags[keybd->id] |= XIMasterAdded; |
| 172 | |
| 173 | ActivateDevice(XTestptr, FALSE); |
| 174 | ActivateDevice(XTestkeybd, FALSE); |
| 175 | flags[XTestptr->id] |= XISlaveAdded; |
| 176 | flags[XTestkeybd->id] |= XISlaveAdded; |
| 177 | |
| 178 | if (c->enable) { |
| 179 | EnableDevice(ptr, FALSE); |
| 180 | EnableDevice(keybd, FALSE); |
| 181 | flags[ptr->id] |= XIDeviceEnabled; |
| 182 | flags[keybd->id] |= XIDeviceEnabled; |
| 183 | |
| 184 | EnableDevice(XTestptr, FALSE); |
| 185 | EnableDevice(XTestkeybd, FALSE); |
| 186 | flags[XTestptr->id] |= XIDeviceEnabled; |
| 187 | flags[XTestkeybd->id] |= XIDeviceEnabled; |
| 188 | } |
| 189 | |
| 190 | /* Attach the XTest virtual devices to the newly |
| 191 | created master device */ |
| 192 | AttachDevice(NULL, XTestptr, ptr); |
| 193 | AttachDevice(NULL, XTestkeybd, keybd); |
| 194 | flags[XTestptr->id] |= XISlaveAttached; |
| 195 | flags[XTestkeybd->id] |= XISlaveAttached; |
| 196 | |
| 197 | XIBarrierNewMasterDevice(client, ptr->id); |
| 198 | |
| 199 | unwind: |
| 200 | free(name); |
| 201 | return rc; |
| 202 | } |
| 203 | |
| 204 | static void |
| 205 | disable_clientpointer(DeviceIntPtr dev) |
| 206 | { |
| 207 | int i; |
| 208 | |
| 209 | for (i = 0; i < currentMaxClients; i++) { |
| 210 | ClientPtr client = clients[i]; |
| 211 | |
| 212 | if (client && client->clientPtr == dev) |
| 213 | client->clientPtr = NULL; |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | static int |
| 218 | remove_master(ClientPtr client, xXIRemoveMasterInfo * r, int flags[MAXDEVICES]) |
| 219 | { |
| 220 | DeviceIntPtr ptr, keybd, XTestptr, XTestkeybd; |
| 221 | int rc = Success; |
| 222 | |
| 223 | if (r->return_mode != XIAttachToMaster && r->return_mode != XIFloating) |
| 224 | return BadValue; |
| 225 | |
| 226 | rc = dixLookupDevice(&ptr, r->deviceid, client, DixDestroyAccess); |
| 227 | if (rc != Success) |
| 228 | goto unwind; |
| 229 | |
| 230 | if (!IsMaster(ptr)) { |
| 231 | client->errorValue = r->deviceid; |
| 232 | rc = BadDevice; |
| 233 | goto unwind; |
| 234 | } |
| 235 | |
| 236 | /* XXX: For now, don't allow removal of VCP, VCK */ |
| 237 | if (ptr == inputInfo.pointer ||ptr == inputInfo.keyboard) { |
| 238 | rc = BadDevice; |
| 239 | goto unwind; |
| 240 | } |
| 241 | |
| 242 | ptr = GetMaster(ptr, MASTER_POINTER); |
| 243 | rc = dixLookupDevice(&ptr, ptr->id, client, DixDestroyAccess); |
| 244 | if (rc != Success) |
| 245 | goto unwind; |
| 246 | keybd = GetMaster(ptr, MASTER_KEYBOARD); |
| 247 | rc = dixLookupDevice(&keybd, keybd->id, client, DixDestroyAccess); |
| 248 | if (rc != Success) |
| 249 | goto unwind; |
| 250 | |
| 251 | XTestptr = GetXTestDevice(ptr); |
| 252 | rc = dixLookupDevice(&XTestptr, XTestptr->id, client, DixDestroyAccess); |
| 253 | if (rc != Success) |
| 254 | goto unwind; |
| 255 | |
| 256 | XTestkeybd = GetXTestDevice(keybd); |
| 257 | rc = dixLookupDevice(&XTestkeybd, XTestkeybd->id, client, DixDestroyAccess); |
| 258 | if (rc != Success) |
| 259 | goto unwind; |
| 260 | |
| 261 | disable_clientpointer(ptr); |
| 262 | |
| 263 | /* Disabling sends the devices floating, reattach them if |
| 264 | * desired. */ |
| 265 | if (r->return_mode == XIAttachToMaster) { |
| 266 | DeviceIntPtr attached, newptr, newkeybd; |
| 267 | |
| 268 | rc = dixLookupDevice(&newptr, r->return_pointer, client, DixAddAccess); |
| 269 | if (rc != Success) |
| 270 | goto unwind; |
| 271 | |
| 272 | if (!IsMaster(newptr)) { |
| 273 | client->errorValue = r->return_pointer; |
| 274 | rc = BadDevice; |
| 275 | goto unwind; |
| 276 | } |
| 277 | |
| 278 | rc = dixLookupDevice(&newkeybd, r->return_keyboard, |
| 279 | client, DixAddAccess); |
| 280 | if (rc != Success) |
| 281 | goto unwind; |
| 282 | |
| 283 | if (!IsMaster(newkeybd)) { |
| 284 | client->errorValue = r->return_keyboard; |
| 285 | rc = BadDevice; |
| 286 | goto unwind; |
| 287 | } |
| 288 | |
| 289 | for (attached = inputInfo.devices; attached; attached = attached->next) { |
| 290 | if (!IsMaster(attached)) { |
| 291 | if (GetMaster(attached, MASTER_ATTACHED) == ptr) { |
| 292 | AttachDevice(client, attached, newptr); |
| 293 | flags[attached->id] |= XISlaveAttached; |
| 294 | } |
| 295 | if (GetMaster(attached, MASTER_ATTACHED) == keybd) { |
| 296 | AttachDevice(client, attached, newkeybd); |
| 297 | flags[attached->id] |= XISlaveAttached; |
| 298 | } |
| 299 | } |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | XIBarrierRemoveMasterDevice(client, ptr->id); |
| 304 | |
| 305 | /* disable the remove the devices, XTest devices must be done first |
| 306 | else the sprites they rely on will be destroyed */ |
| 307 | DisableDevice(XTestptr, FALSE); |
| 308 | DisableDevice(XTestkeybd, FALSE); |
| 309 | DisableDevice(keybd, FALSE); |
| 310 | DisableDevice(ptr, FALSE); |
| 311 | flags[XTestptr->id] |= XIDeviceDisabled | XISlaveDetached; |
| 312 | flags[XTestkeybd->id] |= XIDeviceDisabled | XISlaveDetached; |
| 313 | flags[keybd->id] |= XIDeviceDisabled; |
| 314 | flags[ptr->id] |= XIDeviceDisabled; |
| 315 | |
| 316 | flags[XTestptr->id] |= XISlaveRemoved; |
| 317 | flags[XTestkeybd->id] |= XISlaveRemoved; |
| 318 | flags[keybd->id] |= XIMasterRemoved; |
| 319 | flags[ptr->id] |= XIMasterRemoved; |
| 320 | |
| 321 | RemoveDevice(XTestptr, FALSE); |
| 322 | RemoveDevice(XTestkeybd, FALSE); |
| 323 | RemoveDevice(keybd, FALSE); |
| 324 | RemoveDevice(ptr, FALSE); |
| 325 | |
| 326 | unwind: |
| 327 | return rc; |
| 328 | } |
| 329 | |
| 330 | static int |
| 331 | detach_slave(ClientPtr client, xXIDetachSlaveInfo * c, int flags[MAXDEVICES]) |
| 332 | { |
| 333 | DeviceIntPtr dev; |
| 334 | int rc; |
| 335 | |
| 336 | rc = dixLookupDevice(&dev, c->deviceid, client, DixManageAccess); |
| 337 | if (rc != Success) |
| 338 | goto unwind; |
| 339 | |
| 340 | if (IsMaster(dev)) { |
| 341 | client->errorValue = c->deviceid; |
| 342 | rc = BadDevice; |
| 343 | goto unwind; |
| 344 | } |
| 345 | |
| 346 | /* Don't allow changes to XTest Devices, these are fixed */ |
| 347 | if (IsXTestDevice(dev, NULL)) { |
| 348 | client->errorValue = c->deviceid; |
| 349 | rc = BadDevice; |
| 350 | goto unwind; |
| 351 | } |
| 352 | |
| 353 | ReleaseButtonsAndKeys(dev); |
| 354 | AttachDevice(client, dev, NULL); |
| 355 | flags[dev->id] |= XISlaveDetached; |
| 356 | |
| 357 | unwind: |
| 358 | return rc; |
| 359 | } |
| 360 | |
| 361 | static int |
| 362 | attach_slave(ClientPtr client, xXIAttachSlaveInfo * c, int flags[MAXDEVICES]) |
| 363 | { |
| 364 | DeviceIntPtr dev; |
| 365 | DeviceIntPtr newmaster; |
| 366 | int rc; |
| 367 | |
| 368 | rc = dixLookupDevice(&dev, c->deviceid, client, DixManageAccess); |
| 369 | if (rc != Success) |
| 370 | goto unwind; |
| 371 | |
| 372 | if (IsMaster(dev)) { |
| 373 | client->errorValue = c->deviceid; |
| 374 | rc = BadDevice; |
| 375 | goto unwind; |
| 376 | } |
| 377 | |
| 378 | /* Don't allow changes to XTest Devices, these are fixed */ |
| 379 | if (IsXTestDevice(dev, NULL)) { |
| 380 | client->errorValue = c->deviceid; |
| 381 | rc = BadDevice; |
| 382 | goto unwind; |
| 383 | } |
| 384 | |
| 385 | rc = dixLookupDevice(&newmaster, c->new_master, client, DixAddAccess); |
| 386 | if (rc != Success) |
| 387 | goto unwind; |
| 388 | if (!IsMaster(newmaster)) { |
| 389 | client->errorValue = c->new_master; |
| 390 | rc = BadDevice; |
| 391 | goto unwind; |
| 392 | } |
| 393 | |
| 394 | if (!((IsPointerDevice(newmaster) && IsPointerDevice(dev)) || |
| 395 | (IsKeyboardDevice(newmaster) && IsKeyboardDevice(dev)))) { |
| 396 | rc = BadDevice; |
| 397 | goto unwind; |
| 398 | } |
| 399 | |
| 400 | ReleaseButtonsAndKeys(dev); |
| 401 | AttachDevice(client, dev, newmaster); |
| 402 | flags[dev->id] |= XISlaveAttached; |
| 403 | |
| 404 | unwind: |
| 405 | return rc; |
| 406 | } |
| 407 | |
| 408 | #define SWAPIF(cmd) if (client->swapped) { cmd; } |
| 409 | |
| 410 | int |
| 411 | ProcXIChangeHierarchy(ClientPtr client) |
| 412 | { |
| 413 | xXIAnyHierarchyChangeInfo *any; |
| 414 | int required_len = sizeof(xXIChangeHierarchyReq); |
| 415 | int rc = Success; |
| 416 | int flags[MAXDEVICES] = { 0 }; |
| 417 | |
| 418 | REQUEST(xXIChangeHierarchyReq); |
| 419 | REQUEST_AT_LEAST_SIZE(xXIChangeHierarchyReq); |
| 420 | |
| 421 | if (!stuff->num_changes) |
| 422 | return rc; |
| 423 | |
| 424 | any = (xXIAnyHierarchyChangeInfo *) &stuff[1]; |
| 425 | while (stuff->num_changes--) { |
| 426 | SWAPIF(swaps(&any->type)); |
| 427 | SWAPIF(swaps(&any->length)); |
| 428 | |
| 429 | required_len += any->length; |
| 430 | if ((stuff->length * 4) < required_len) |
| 431 | return BadLength; |
| 432 | |
| 433 | switch (any->type) { |
| 434 | case XIAddMaster: |
| 435 | { |
| 436 | xXIAddMasterInfo *c = (xXIAddMasterInfo *) any; |
| 437 | |
| 438 | SWAPIF(swaps(&c->name_len)); |
| 439 | |
| 440 | rc = add_master(client, c, flags); |
| 441 | if (rc != Success) |
| 442 | goto unwind; |
| 443 | } |
| 444 | break; |
| 445 | case XIRemoveMaster: |
| 446 | { |
| 447 | xXIRemoveMasterInfo *r = (xXIRemoveMasterInfo *) any; |
| 448 | |
| 449 | rc = remove_master(client, r, flags); |
| 450 | if (rc != Success) |
| 451 | goto unwind; |
| 452 | } |
| 453 | break; |
| 454 | case XIDetachSlave: |
| 455 | { |
| 456 | xXIDetachSlaveInfo *c = (xXIDetachSlaveInfo *) any; |
| 457 | |
| 458 | rc = detach_slave(client, c, flags); |
| 459 | if (rc != Success) |
| 460 | goto unwind; |
| 461 | } |
| 462 | break; |
| 463 | case XIAttachSlave: |
| 464 | { |
| 465 | xXIAttachSlaveInfo *c = (xXIAttachSlaveInfo *) any; |
| 466 | |
| 467 | rc = attach_slave(client, c, flags); |
| 468 | if (rc != Success) |
| 469 | goto unwind; |
| 470 | } |
| 471 | break; |
| 472 | } |
| 473 | |
| 474 | any = (xXIAnyHierarchyChangeInfo *) ((char *) any + any->length * 4); |
| 475 | } |
| 476 | |
| 477 | unwind: |
| 478 | |
| 479 | XISendDeviceHierarchyEvent(flags); |
| 480 | return rc; |
| 481 | } |