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772db4bb | 1 | /** @file\r |
2 | \r | |
7bce0c5a | 3 | Copyright (c) 2006 - 2008, Intel Corporation\r |
772db4bb | 4 | All rights reserved. This program and the accompanying materials\r |
5 | are licensed and made available under the terms and conditions of the BSD License\r | |
6 | which accompanies this distribution. The full text of the license may be found at\r | |
7 | http://opensource.org/licenses/bsd-license.php\r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
11 | \r | |
12 | \r | |
13 | Module Name:\r | |
14 | \r | |
15 | Dhcp4Driver.c\r | |
16 | \r | |
17 | Abstract:\r | |
18 | \r | |
19 | \r | |
20 | **/\r | |
21 | \r | |
22 | #include "Dhcp4Impl.h"\r | |
23 | #include "Dhcp4Driver.h"\r | |
24 | \r | |
25 | EFI_DRIVER_BINDING_PROTOCOL gDhcp4DriverBinding = {\r | |
26 | Dhcp4DriverBindingSupported,\r | |
27 | Dhcp4DriverBindingStart,\r | |
28 | Dhcp4DriverBindingStop,\r | |
29 | 0xa,\r | |
30 | NULL,\r | |
31 | NULL\r | |
32 | };\r | |
33 | \r | |
34 | EFI_SERVICE_BINDING_PROTOCOL mDhcp4ServiceBindingTemplete = {\r | |
35 | Dhcp4ServiceBindingCreateChild,\r | |
36 | Dhcp4ServiceBindingDestroyChild\r | |
37 | };\r | |
38 | \r | |
7bce0c5a | 39 | /**\r |
40 | Entry point of the DHCP driver to install various protocols.\r | |
41 | \r | |
42 | @param ImageHandle The image handle of the driver.\r | |
43 | @param SystemTable The system table.\r | |
44 | \r | |
45 | @retval EFI_SUCCES if the driver binding and component name protocols are successfully\r | |
46 | @retval Others Failed to install the protocols.\r | |
772db4bb | 47 | \r |
7bce0c5a | 48 | **/\r |
772db4bb | 49 | EFI_STATUS\r |
50 | EFIAPI\r | |
51 | Dhcp4DriverEntryPoint (\r | |
52 | IN EFI_HANDLE ImageHandle,\r | |
53 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
54 | )\r | |
772db4bb | 55 | {\r |
83cbd279 | 56 | return EfiLibInstallDriverBindingComponentName2 (\r |
772db4bb | 57 | ImageHandle,\r |
58 | SystemTable,\r | |
59 | &gDhcp4DriverBinding,\r | |
60 | ImageHandle,\r | |
61 | &gDhcp4ComponentName,\r | |
83cbd279 | 62 | &gDhcp4ComponentName2\r |
772db4bb | 63 | );\r |
64 | }\r | |
65 | \r | |
66 | \r | |
67 | /**\r | |
68 | Test to see if DHCP driver supports the ControllerHandle.\r | |
69 | \r | |
70 | @param This Protocol instance pointer.\r | |
71 | @param ControllerHandle Handle of device to test\r | |
72 | @param RemainingDevicePath Optional parameter use to pick a specific child\r | |
73 | device to start.\r | |
74 | \r | |
75 | @retval EFI_SUCCES This driver supports this device\r | |
76 | @retval other This driver does not support this device\r | |
77 | \r | |
78 | **/\r | |
79 | EFI_STATUS\r | |
80 | EFIAPI\r | |
81 | Dhcp4DriverBindingSupported (\r | |
82 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
83 | IN EFI_HANDLE ControllerHandle,\r | |
84 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r | |
85 | )\r | |
86 | {\r | |
87 | EFI_STATUS Status;\r | |
88 | \r | |
89 | Status = gBS->OpenProtocol (\r | |
90 | ControllerHandle,\r | |
91 | &gEfiUdp4ServiceBindingProtocolGuid,\r | |
92 | NULL,\r | |
93 | This->DriverBindingHandle,\r | |
94 | ControllerHandle,\r | |
95 | EFI_OPEN_PROTOCOL_TEST_PROTOCOL\r | |
96 | );\r | |
97 | \r | |
98 | return Status;\r | |
99 | }\r | |
100 | \r | |
101 | \r | |
102 | \r | |
103 | /**\r | |
104 | Configure the default UDP child to receive all the DHCP traffics\r | |
105 | on this network interface.\r | |
106 | \r | |
107 | @param UdpIo The UDP IO port to configure\r | |
108 | @param Context The context to the function\r | |
109 | \r | |
110 | @retval EFI_SUCCESS The UDP IO port is successfully configured.\r | |
111 | @retval Others Failed to configure the UDP child.\r | |
112 | \r | |
113 | **/\r | |
114 | EFI_STATUS\r | |
115 | DhcpConfigUdpIo (\r | |
116 | IN UDP_IO_PORT *UdpIo,\r | |
117 | IN VOID *Context\r | |
118 | )\r | |
119 | {\r | |
120 | EFI_UDP4_CONFIG_DATA UdpConfigData;\r | |
121 | \r | |
122 | UdpConfigData.AcceptBroadcast = TRUE;\r | |
123 | UdpConfigData.AcceptPromiscuous = FALSE;\r | |
124 | UdpConfigData.AcceptAnyPort = FALSE;\r | |
125 | UdpConfigData.AllowDuplicatePort = TRUE;\r | |
126 | UdpConfigData.TypeOfService = 0;\r | |
127 | UdpConfigData.TimeToLive = 64;\r | |
128 | UdpConfigData.DoNotFragment = FALSE;\r | |
129 | UdpConfigData.ReceiveTimeout = 0;\r | |
130 | UdpConfigData.TransmitTimeout = 0;\r | |
131 | \r | |
132 | UdpConfigData.UseDefaultAddress = FALSE;\r | |
133 | UdpConfigData.StationPort = DHCP_CLIENT_PORT;\r | |
134 | UdpConfigData.RemotePort = DHCP_SERVER_PORT;\r | |
135 | \r | |
e48e37fc | 136 | ZeroMem (&UdpConfigData.StationAddress, sizeof (EFI_IPv4_ADDRESS));\r |
137 | ZeroMem (&UdpConfigData.SubnetMask, sizeof (EFI_IPv4_ADDRESS));\r | |
138 | ZeroMem (&UdpConfigData.RemoteAddress, sizeof (EFI_IPv4_ADDRESS));\r | |
772db4bb | 139 | \r |
140 | return UdpIo->Udp->Configure (UdpIo->Udp, &UdpConfigData);;\r | |
141 | }\r | |
142 | \r | |
143 | \r | |
144 | \r | |
145 | /**\r | |
146 | Destory the DHCP service. The Dhcp4 service may be partly initialized,\r | |
147 | or partly destoried. If a resource is destoried, it is marked as so in\r | |
148 | case the destory failed and being called again later.\r | |
149 | \r | |
150 | @param DhcpSb The DHCP service instance to destory.\r | |
151 | \r | |
152 | @retval EFI_SUCCESS The DHCP service is successfully closed.\r | |
153 | \r | |
154 | **/\r | |
155 | EFI_STATUS\r | |
156 | Dhcp4CloseService (\r | |
157 | IN DHCP_SERVICE *DhcpSb\r | |
158 | )\r | |
159 | {\r | |
160 | DhcpCleanLease (DhcpSb);\r | |
161 | \r | |
162 | if (DhcpSb->UdpIo != NULL) {\r | |
163 | UdpIoFreePort (DhcpSb->UdpIo);\r | |
164 | DhcpSb->UdpIo = NULL;\r | |
165 | }\r | |
166 | \r | |
167 | if (DhcpSb->Timer != NULL) {\r | |
168 | gBS->SetTimer (DhcpSb->Timer, TimerCancel, 0);\r | |
169 | gBS->CloseEvent (DhcpSb->Timer);\r | |
170 | \r | |
171 | DhcpSb->Timer = NULL;\r | |
172 | }\r | |
173 | \r | |
174 | return EFI_SUCCESS;\r | |
175 | }\r | |
176 | \r | |
177 | \r | |
178 | \r | |
179 | /**\r | |
180 | Create a new DHCP service binding instance for the controller.\r | |
181 | \r | |
182 | @param Controller The controller to install DHCP service binding\r | |
183 | protocol onto\r | |
184 | @param ImageHandle The driver's image handle\r | |
185 | @param Service The variable to receive the created DHCP service\r | |
186 | instance.\r | |
187 | \r | |
188 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resource .\r | |
189 | @retval EFI_SUCCESS The DHCP service instance is created.\r | |
190 | \r | |
191 | **/\r | |
192 | EFI_STATUS\r | |
193 | Dhcp4CreateService (\r | |
194 | IN EFI_HANDLE Controller,\r | |
195 | IN EFI_HANDLE ImageHandle,\r | |
196 | OUT DHCP_SERVICE **Service\r | |
197 | )\r | |
198 | {\r | |
199 | DHCP_SERVICE *DhcpSb;\r | |
200 | EFI_STATUS Status;\r | |
201 | \r | |
202 | *Service = NULL;\r | |
e48e37fc | 203 | DhcpSb = AllocateZeroPool (sizeof (DHCP_SERVICE));\r |
772db4bb | 204 | \r |
205 | if (DhcpSb == NULL) {\r | |
206 | return EFI_OUT_OF_RESOURCES;\r | |
207 | }\r | |
208 | \r | |
209 | DhcpSb->Signature = DHCP_SERVICE_SIGNATURE;\r | |
210 | DhcpSb->ServiceBinding = mDhcp4ServiceBindingTemplete;\r | |
211 | DhcpSb->ServiceState = DHCP_UNCONFIGED;\r | |
212 | DhcpSb->InDestory = FALSE;\r | |
213 | DhcpSb->Controller = Controller;\r | |
214 | DhcpSb->Image = ImageHandle;\r | |
e48e37fc | 215 | InitializeListHead (&DhcpSb->Children);\r |
772db4bb | 216 | DhcpSb->DhcpState = Dhcp4Stopped;\r |
217 | DhcpSb->Xid = NET_RANDOM (NetRandomInitSeed ());\r | |
218 | \r | |
219 | //\r | |
220 | // Create various resources, UdpIo, Timer, and get Mac address\r | |
221 | //\r | |
222 | Status = gBS->CreateEvent (\r | |
223 | EVT_NOTIFY_SIGNAL | EVT_TIMER,\r | |
e48e37fc | 224 | TPL_CALLBACK,\r |
772db4bb | 225 | DhcpOnTimerTick,\r |
226 | DhcpSb,\r | |
227 | &DhcpSb->Timer\r | |
228 | );\r | |
229 | \r | |
230 | if (EFI_ERROR (Status)) {\r | |
231 | goto ON_ERROR;\r | |
232 | }\r | |
233 | \r | |
234 | DhcpSb->UdpIo = UdpIoCreatePort (Controller, ImageHandle, DhcpConfigUdpIo, NULL);\r | |
235 | \r | |
236 | if (DhcpSb->UdpIo == NULL) {\r | |
237 | Status = EFI_OUT_OF_RESOURCES;\r | |
238 | goto ON_ERROR;\r | |
239 | }\r | |
240 | \r | |
241 | DhcpSb->HwLen = (UINT8) DhcpSb->UdpIo->SnpMode.HwAddressSize;\r | |
242 | DhcpSb->HwType = DhcpSb->UdpIo->SnpMode.IfType;\r | |
687a2e5f | 243 | CopyMem (&DhcpSb->Mac, &DhcpSb->UdpIo->SnpMode.CurrentAddress, sizeof (DhcpSb->Mac));\r |
772db4bb | 244 | \r |
245 | *Service = DhcpSb;\r | |
246 | return EFI_SUCCESS;\r | |
247 | \r | |
248 | ON_ERROR:\r | |
249 | Dhcp4CloseService (DhcpSb);\r | |
e48e37fc | 250 | gBS->FreePool (DhcpSb);\r |
772db4bb | 251 | \r |
252 | return Status;\r | |
253 | }\r | |
254 | \r | |
255 | \r | |
256 | /**\r | |
257 | Start this driver on ControllerHandle.\r | |
258 | \r | |
259 | @param This Protocol instance pointer.\r | |
260 | @param ControllerHandle Handle of device to bind driver to\r | |
261 | @param RemainingDevicePath Optional parameter use to pick a specific child\r | |
262 | device to start.\r | |
263 | \r | |
264 | @retval EFI_SUCCES This driver is added to ControllerHandle\r | |
265 | @retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle\r | |
266 | @retval other This driver does not support this device\r | |
267 | \r | |
268 | **/\r | |
269 | EFI_STATUS\r | |
270 | EFIAPI\r | |
271 | Dhcp4DriverBindingStart (\r | |
272 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
273 | IN EFI_HANDLE ControllerHandle,\r | |
274 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r | |
275 | )\r | |
276 | {\r | |
277 | DHCP_SERVICE *DhcpSb;\r | |
278 | EFI_STATUS Status;\r | |
279 | \r | |
280 | //\r | |
281 | // First: test for the DHCP4 Protocol\r | |
282 | //\r | |
283 | Status = gBS->OpenProtocol (\r | |
284 | ControllerHandle,\r | |
285 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
286 | NULL,\r | |
287 | This->DriverBindingHandle,\r | |
288 | ControllerHandle,\r | |
289 | EFI_OPEN_PROTOCOL_TEST_PROTOCOL\r | |
290 | );\r | |
291 | \r | |
292 | if (Status == EFI_SUCCESS) {\r | |
293 | return EFI_ALREADY_STARTED;\r | |
294 | }\r | |
295 | \r | |
296 | Status = Dhcp4CreateService (ControllerHandle, This->DriverBindingHandle, &DhcpSb);\r | |
297 | \r | |
298 | if (EFI_ERROR (Status)) {\r | |
299 | return Status;\r | |
300 | }\r | |
301 | \r | |
302 | Status = gBS->SetTimer (DhcpSb->Timer, TimerPeriodic, TICKS_PER_SECOND);\r | |
303 | \r | |
304 | if (EFI_ERROR (Status)) {\r | |
305 | goto ON_ERROR;\r | |
306 | }\r | |
307 | \r | |
308 | //\r | |
309 | // Install the Dhcp4ServiceBinding Protocol onto ControlerHandle\r | |
310 | //\r | |
311 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
312 | &ControllerHandle,\r | |
313 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
314 | &DhcpSb->ServiceBinding,\r | |
315 | NULL\r | |
316 | );\r | |
317 | \r | |
318 | if (EFI_ERROR (Status)) {\r | |
319 | goto ON_ERROR;\r | |
320 | }\r | |
321 | \r | |
322 | return Status;\r | |
323 | \r | |
324 | ON_ERROR:\r | |
325 | Dhcp4CloseService (DhcpSb);\r | |
e48e37fc | 326 | gBS->FreePool (DhcpSb);\r |
772db4bb | 327 | return Status;\r |
328 | }\r | |
329 | \r | |
330 | \r | |
331 | /**\r | |
332 | Stop this driver on ControllerHandle.\r | |
333 | \r | |
334 | @param This Protocol instance pointer.\r | |
335 | @param ControllerHandle Handle of device to stop driver on\r | |
336 | @param NumberOfChildren Number of Handles in ChildHandleBuffer. If number\r | |
337 | of children is zero stop the entire bus driver.\r | |
338 | @param ChildHandleBuffer List of Child Handles to Stop.\r | |
339 | \r | |
340 | @retval EFI_SUCCES This driver is removed ControllerHandle\r | |
341 | @retval other This driver was not removed from this device\r | |
342 | \r | |
343 | **/\r | |
344 | EFI_STATUS\r | |
345 | EFIAPI\r | |
346 | Dhcp4DriverBindingStop (\r | |
347 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
348 | IN EFI_HANDLE ControllerHandle,\r | |
349 | IN UINTN NumberOfChildren,\r | |
350 | IN EFI_HANDLE *ChildHandleBuffer\r | |
351 | )\r | |
352 | {\r | |
353 | EFI_SERVICE_BINDING_PROTOCOL *ServiceBinding;\r | |
354 | DHCP_SERVICE *DhcpSb;\r | |
355 | DHCP_PROTOCOL *Instance;\r | |
356 | EFI_HANDLE NicHandle;\r | |
357 | EFI_STATUS Status;\r | |
358 | EFI_TPL OldTpl;\r | |
359 | \r | |
360 | //\r | |
361 | // DHCP driver opens UDP child, So, the ControllerHandle is the\r | |
362 | // UDP child handle. locate the Nic handle first.\r | |
363 | //\r | |
364 | NicHandle = NetLibGetNicHandle (ControllerHandle, &gEfiUdp4ProtocolGuid);\r | |
365 | \r | |
366 | if (NicHandle == NULL) {\r | |
c4a62a12 | 367 | return EFI_DEVICE_ERROR;\r |
772db4bb | 368 | }\r |
369 | \r | |
370 | Status = gBS->OpenProtocol (\r | |
371 | NicHandle,\r | |
372 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
373 | (VOID **) &ServiceBinding,\r | |
374 | This->DriverBindingHandle,\r | |
375 | NicHandle,\r | |
376 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
377 | );\r | |
378 | \r | |
379 | if (EFI_ERROR (Status)) {\r | |
380 | return EFI_DEVICE_ERROR;\r | |
381 | }\r | |
382 | \r | |
383 | DhcpSb = DHCP_SERVICE_FROM_THIS (ServiceBinding);\r | |
384 | \r | |
385 | if (DhcpSb->InDestory) {\r | |
386 | return EFI_SUCCESS;\r | |
387 | }\r | |
388 | \r | |
e48e37fc | 389 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r |
772db4bb | 390 | \r |
c4a62a12 | 391 | if (NumberOfChildren == 0) {\r |
772db4bb | 392 | \r |
c4a62a12 | 393 | DhcpSb->InDestory = TRUE;\r |
394 | DhcpSb->ServiceState = DHCP_DESTORY;\r | |
772db4bb | 395 | \r |
c4a62a12 | 396 | gBS->UninstallProtocolInterface (\r |
397 | NicHandle,\r | |
398 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
399 | ServiceBinding\r | |
400 | );\r | |
772db4bb | 401 | \r |
c4a62a12 | 402 | Dhcp4CloseService (DhcpSb);\r |
403 | \r | |
e48e37fc | 404 | gBS->FreePool (DhcpSb);\r |
c4a62a12 | 405 | } else {\r |
406 | //\r | |
407 | // Don't use NET_LIST_FOR_EACH_SAFE here, Dhcp4ServiceBindingDestoryChild\r | |
408 | // may cause other child to be deleted.\r | |
409 | //\r | |
e48e37fc | 410 | while (!IsListEmpty (&DhcpSb->Children)) {\r |
c4a62a12 | 411 | Instance = NET_LIST_HEAD (&DhcpSb->Children, DHCP_PROTOCOL, Link);\r |
412 | ServiceBinding->DestroyChild (ServiceBinding, Instance->Handle);\r | |
413 | }\r | |
414 | \r | |
415 | if (DhcpSb->NumChildren != 0) {\r | |
416 | Status = EFI_DEVICE_ERROR;\r | |
417 | }\r | |
772db4bb | 418 | }\r |
419 | \r | |
e48e37fc | 420 | gBS->RestoreTPL (OldTpl);\r |
772db4bb | 421 | \r |
772db4bb | 422 | return Status;\r |
423 | }\r | |
424 | \r | |
425 | \r | |
426 | /**\r | |
7bce0c5a | 427 | Initialize a new DHCP child.\r |
772db4bb | 428 | \r |
429 | @param DhcpSb The dhcp service instance\r | |
430 | @param Instance The dhcp instance to initialize\r | |
431 | \r | |
432 | @return None\r | |
433 | \r | |
434 | **/\r | |
435 | VOID\r | |
436 | DhcpInitProtocol (\r | |
437 | IN DHCP_SERVICE *DhcpSb,\r | |
438 | IN DHCP_PROTOCOL *Instance\r | |
439 | )\r | |
440 | {\r | |
441 | Instance->Signature = DHCP_PROTOCOL_SIGNATURE;\r | |
687a2e5f | 442 | CopyMem (&Instance->Dhcp4Protocol, &mDhcp4ProtocolTemplate, sizeof (Instance->Dhcp4Protocol));\r |
e48e37fc | 443 | InitializeListHead (&Instance->Link);\r |
772db4bb | 444 | Instance->Handle = NULL;\r |
445 | Instance->Service = DhcpSb;\r | |
446 | Instance->InDestory = FALSE;\r | |
447 | Instance->CompletionEvent = NULL;\r | |
448 | Instance->RenewRebindEvent = NULL;\r | |
449 | Instance->Token = NULL;\r | |
c4a62a12 | 450 | Instance->UdpIo = NULL;\r |
451 | NetbufQueInit (&Instance->ResponseQueue);\r | |
772db4bb | 452 | }\r |
453 | \r | |
454 | \r | |
455 | /**\r | |
456 | Creates a child handle with a set of DHCP4 services.\r | |
457 | \r | |
458 | @param This Protocol instance pointer.\r | |
459 | @param ChildHandle Pointer to the handle of the child to create. If\r | |
460 | it is NULL, then a new handle is created. If it\r | |
461 | is not NULL, then the DHCP4 services are added to\r | |
462 | the existing child handle.\r | |
463 | \r | |
464 | @retval EFI_SUCCES The child handle was created with the DHCP4\r | |
465 | services\r | |
466 | @retval EFI_OUT_OF_RESOURCES There are not enough resources to create the child\r | |
467 | @retval other The child handle was not created\r | |
468 | \r | |
469 | **/\r | |
470 | EFI_STATUS\r | |
471 | EFIAPI\r | |
472 | Dhcp4ServiceBindingCreateChild (\r | |
473 | IN EFI_SERVICE_BINDING_PROTOCOL *This,\r | |
474 | IN EFI_HANDLE *ChildHandle\r | |
475 | )\r | |
476 | {\r | |
477 | DHCP_SERVICE *DhcpSb;\r | |
478 | DHCP_PROTOCOL *Instance;\r | |
479 | EFI_STATUS Status;\r | |
480 | EFI_TPL OldTpl;\r | |
481 | VOID *Udp4;\r | |
482 | \r | |
483 | if ((This == NULL) || (ChildHandle == NULL)) {\r | |
484 | return EFI_INVALID_PARAMETER;\r | |
485 | }\r | |
486 | \r | |
e48e37fc | 487 | Instance = AllocatePool (sizeof (*Instance));\r |
772db4bb | 488 | \r |
489 | if (Instance == NULL) {\r | |
490 | return EFI_OUT_OF_RESOURCES;\r | |
491 | }\r | |
492 | \r | |
493 | DhcpSb = DHCP_SERVICE_FROM_THIS (This);\r | |
494 | DhcpInitProtocol (DhcpSb, Instance);\r | |
495 | \r | |
496 | //\r | |
497 | // Install DHCP4 onto ChildHandle\r | |
498 | //\r | |
499 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
500 | ChildHandle,\r | |
501 | &gEfiDhcp4ProtocolGuid,\r | |
502 | &Instance->Dhcp4Protocol,\r | |
503 | NULL\r | |
504 | );\r | |
505 | \r | |
506 | if (EFI_ERROR (Status)) {\r | |
e48e37fc | 507 | gBS->FreePool (Instance);\r |
772db4bb | 508 | return Status;\r |
509 | }\r | |
510 | \r | |
511 | Instance->Handle = *ChildHandle;\r | |
512 | \r | |
513 | //\r | |
514 | // Open the Udp4 protocol BY_CHILD.\r | |
515 | //\r | |
516 | Status = gBS->OpenProtocol (\r | |
517 | DhcpSb->UdpIo->UdpHandle,\r | |
518 | &gEfiUdp4ProtocolGuid,\r | |
519 | (VOID **) &Udp4,\r | |
520 | gDhcp4DriverBinding.DriverBindingHandle,\r | |
521 | Instance->Handle,\r | |
522 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
523 | );\r | |
524 | if (EFI_ERROR (Status)) {\r | |
525 | gBS->UninstallMultipleProtocolInterfaces (\r | |
526 | Instance->Handle,\r | |
527 | &gEfiDhcp4ProtocolGuid,\r | |
528 | &Instance->Dhcp4Protocol,\r | |
529 | NULL\r | |
530 | );\r | |
531 | \r | |
e48e37fc | 532 | gBS->FreePool (Instance);\r |
772db4bb | 533 | return Status;\r |
534 | }\r | |
535 | \r | |
e48e37fc | 536 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r |
772db4bb | 537 | \r |
e48e37fc | 538 | InsertTailList (&DhcpSb->Children, &Instance->Link);\r |
772db4bb | 539 | DhcpSb->NumChildren++;\r |
540 | \r | |
e48e37fc | 541 | gBS->RestoreTPL (OldTpl);\r |
772db4bb | 542 | \r |
543 | return EFI_SUCCESS;\r | |
544 | }\r | |
545 | \r | |
546 | \r | |
547 | /**\r | |
548 | Destroys a child handle with a set of DHCP4 services.\r | |
549 | \r | |
550 | @param This Protocol instance pointer.\r | |
551 | @param ChildHandle Handle of the child to destroy\r | |
552 | \r | |
553 | @retval EFI_SUCCES The DHCP4 service is removed from the child handle\r | |
554 | @retval EFI_UNSUPPORTED The child handle does not support the DHCP4\r | |
555 | service\r | |
556 | @retval EFI_INVALID_PARAMETER Child handle is not a valid EFI Handle.\r | |
557 | @retval EFI_ACCESS_DENIED The child handle could not be destroyed because\r | |
558 | its DHCP4 services are being used.\r | |
559 | @retval other The child handle was not destroyed\r | |
560 | \r | |
561 | **/\r | |
562 | EFI_STATUS\r | |
563 | EFIAPI\r | |
564 | Dhcp4ServiceBindingDestroyChild (\r | |
565 | IN EFI_SERVICE_BINDING_PROTOCOL *This,\r | |
566 | IN EFI_HANDLE ChildHandle\r | |
567 | )\r | |
568 | {\r | |
569 | DHCP_SERVICE *DhcpSb;\r | |
570 | DHCP_PROTOCOL *Instance;\r | |
571 | EFI_DHCP4_PROTOCOL *Dhcp;\r | |
572 | EFI_TPL OldTpl;\r | |
573 | EFI_STATUS Status;\r | |
574 | \r | |
575 | if ((This == NULL) || (ChildHandle == NULL)) {\r | |
576 | return EFI_INVALID_PARAMETER;\r | |
577 | }\r | |
578 | \r | |
579 | //\r | |
580 | // Retrieve the private context data structures\r | |
581 | //\r | |
582 | Status = gBS->OpenProtocol (\r | |
583 | ChildHandle,\r | |
584 | &gEfiDhcp4ProtocolGuid,\r | |
585 | (VOID **) &Dhcp,\r | |
586 | gDhcp4DriverBinding.DriverBindingHandle,\r | |
587 | ChildHandle,\r | |
588 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
589 | );\r | |
590 | \r | |
591 | if (EFI_ERROR (Status)) {\r | |
592 | return EFI_UNSUPPORTED;\r | |
593 | }\r | |
594 | \r | |
595 | Instance = DHCP_INSTANCE_FROM_THIS (Dhcp);\r | |
596 | DhcpSb = DHCP_SERVICE_FROM_THIS (This);\r | |
597 | \r | |
598 | if (Instance->Service != DhcpSb) {\r | |
599 | return EFI_INVALID_PARAMETER;\r | |
600 | }\r | |
601 | \r | |
602 | //\r | |
603 | // A child can be destoried more than once. For example,\r | |
604 | // Dhcp4DriverBindingStop will destory all of its children.\r | |
605 | // when caller driver is being stopped, it will destory the\r | |
606 | // dhcp child it opens.\r | |
607 | //\r | |
608 | if (Instance->InDestory) {\r | |
609 | return EFI_SUCCESS;\r | |
610 | }\r | |
611 | \r | |
e48e37fc | 612 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r |
772db4bb | 613 | Instance->InDestory = TRUE;\r |
614 | \r | |
615 | //\r | |
616 | // Close the Udp4 protocol.\r | |
617 | //\r | |
618 | gBS->CloseProtocol (\r | |
619 | DhcpSb->UdpIo->UdpHandle,\r | |
620 | &gEfiUdp4ProtocolGuid,\r | |
621 | gDhcp4DriverBinding.DriverBindingHandle,\r | |
622 | ChildHandle\r | |
623 | );\r | |
624 | \r | |
625 | //\r | |
626 | // Uninstall the DHCP4 protocol first to enable a top down destruction.\r | |
627 | //\r | |
628 | Status = gBS->UninstallProtocolInterface (\r | |
629 | ChildHandle,\r | |
630 | &gEfiDhcp4ProtocolGuid,\r | |
631 | Dhcp\r | |
632 | );\r | |
633 | \r | |
634 | if (EFI_ERROR (Status)) {\r | |
635 | Instance->InDestory = FALSE;\r | |
636 | \r | |
e48e37fc | 637 | gBS->RestoreTPL (OldTpl);\r |
772db4bb | 638 | return Status;\r |
639 | }\r | |
640 | \r | |
641 | if (DhcpSb->ActiveChild == Instance) {\r | |
642 | DhcpYieldControl (DhcpSb);\r | |
643 | }\r | |
644 | \r | |
e48e37fc | 645 | RemoveEntryList (&Instance->Link);\r |
772db4bb | 646 | DhcpSb->NumChildren--;\r |
647 | \r | |
e48e37fc | 648 | gBS->RestoreTPL (OldTpl);\r |
772db4bb | 649 | \r |
e48e37fc | 650 | gBS->FreePool (Instance);\r |
772db4bb | 651 | return EFI_SUCCESS;\r |
652 | }\r |