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772db4bb | 1 | /** @file\r |
2 | \r | |
3 | Copyright (c) 2006 - 2007, Intel Corporation\r | |
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 | |
39 | //@MT: EFI_DRIVER_ENTRY_POINT (Dhcp4DriverEntryPoint)\r | |
40 | \r | |
41 | EFI_STATUS\r | |
42 | EFIAPI\r | |
43 | Dhcp4DriverEntryPoint (\r | |
44 | IN EFI_HANDLE ImageHandle,\r | |
45 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
46 | )\r | |
47 | /*++\r | |
48 | \r | |
49 | Routine Description:\r | |
50 | \r | |
51 | Entry point of the DHCP driver to install various protocols.\r | |
52 | \r | |
53 | Arguments:\r | |
54 | \r | |
55 | ImageHandle - The driver's image handle\r | |
56 | SystemTable - The system table\r | |
57 | \r | |
58 | Returns:\r | |
59 | \r | |
60 | EFI_SUCCESS - All the related protocols are installed.\r | |
61 | Others - Failed to install the protocols.\r | |
62 | \r | |
63 | --*/\r | |
64 | {\r | |
65 | return NetLibInstallAllDriverProtocols (\r | |
66 | ImageHandle,\r | |
67 | SystemTable,\r | |
68 | &gDhcp4DriverBinding,\r | |
69 | ImageHandle,\r | |
70 | &gDhcp4ComponentName,\r | |
71 | NULL,\r | |
72 | NULL\r | |
73 | );\r | |
74 | }\r | |
75 | \r | |
76 | \r | |
77 | /**\r | |
78 | Test to see if DHCP driver supports the ControllerHandle.\r | |
79 | \r | |
80 | @param This Protocol instance pointer.\r | |
81 | @param ControllerHandle Handle of device to test\r | |
82 | @param RemainingDevicePath Optional parameter use to pick a specific child\r | |
83 | device to start.\r | |
84 | \r | |
85 | @retval EFI_SUCCES This driver supports this device\r | |
86 | @retval other This driver does not support this device\r | |
87 | \r | |
88 | **/\r | |
89 | EFI_STATUS\r | |
90 | EFIAPI\r | |
91 | Dhcp4DriverBindingSupported (\r | |
92 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
93 | IN EFI_HANDLE ControllerHandle,\r | |
94 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r | |
95 | )\r | |
96 | {\r | |
97 | EFI_STATUS Status;\r | |
98 | \r | |
99 | Status = gBS->OpenProtocol (\r | |
100 | ControllerHandle,\r | |
101 | &gEfiUdp4ServiceBindingProtocolGuid,\r | |
102 | NULL,\r | |
103 | This->DriverBindingHandle,\r | |
104 | ControllerHandle,\r | |
105 | EFI_OPEN_PROTOCOL_TEST_PROTOCOL\r | |
106 | );\r | |
107 | \r | |
108 | return Status;\r | |
109 | }\r | |
110 | \r | |
111 | \r | |
112 | \r | |
113 | /**\r | |
114 | Configure the default UDP child to receive all the DHCP traffics\r | |
115 | on this network interface.\r | |
116 | \r | |
117 | @param UdpIo The UDP IO port to configure\r | |
118 | @param Context The context to the function\r | |
119 | \r | |
120 | @retval EFI_SUCCESS The UDP IO port is successfully configured.\r | |
121 | @retval Others Failed to configure the UDP child.\r | |
122 | \r | |
123 | **/\r | |
124 | EFI_STATUS\r | |
125 | DhcpConfigUdpIo (\r | |
126 | IN UDP_IO_PORT *UdpIo,\r | |
127 | IN VOID *Context\r | |
128 | )\r | |
129 | {\r | |
130 | EFI_UDP4_CONFIG_DATA UdpConfigData;\r | |
131 | \r | |
132 | UdpConfigData.AcceptBroadcast = TRUE;\r | |
133 | UdpConfigData.AcceptPromiscuous = FALSE;\r | |
134 | UdpConfigData.AcceptAnyPort = FALSE;\r | |
135 | UdpConfigData.AllowDuplicatePort = TRUE;\r | |
136 | UdpConfigData.TypeOfService = 0;\r | |
137 | UdpConfigData.TimeToLive = 64;\r | |
138 | UdpConfigData.DoNotFragment = FALSE;\r | |
139 | UdpConfigData.ReceiveTimeout = 0;\r | |
140 | UdpConfigData.TransmitTimeout = 0;\r | |
141 | \r | |
142 | UdpConfigData.UseDefaultAddress = FALSE;\r | |
143 | UdpConfigData.StationPort = DHCP_CLIENT_PORT;\r | |
144 | UdpConfigData.RemotePort = DHCP_SERVER_PORT;\r | |
145 | \r | |
146 | NetZeroMem (&UdpConfigData.StationAddress, sizeof (EFI_IPv4_ADDRESS));\r | |
147 | NetZeroMem (&UdpConfigData.SubnetMask, sizeof (EFI_IPv4_ADDRESS));\r | |
148 | NetZeroMem (&UdpConfigData.RemoteAddress, sizeof (EFI_IPv4_ADDRESS));\r | |
149 | \r | |
150 | return UdpIo->Udp->Configure (UdpIo->Udp, &UdpConfigData);;\r | |
151 | }\r | |
152 | \r | |
153 | \r | |
154 | \r | |
155 | /**\r | |
156 | Destory the DHCP service. The Dhcp4 service may be partly initialized,\r | |
157 | or partly destoried. If a resource is destoried, it is marked as so in\r | |
158 | case the destory failed and being called again later.\r | |
159 | \r | |
160 | @param DhcpSb The DHCP service instance to destory.\r | |
161 | \r | |
162 | @retval EFI_SUCCESS The DHCP service is successfully closed.\r | |
163 | \r | |
164 | **/\r | |
165 | EFI_STATUS\r | |
166 | Dhcp4CloseService (\r | |
167 | IN DHCP_SERVICE *DhcpSb\r | |
168 | )\r | |
169 | {\r | |
170 | DhcpCleanLease (DhcpSb);\r | |
171 | \r | |
172 | if (DhcpSb->UdpIo != NULL) {\r | |
173 | UdpIoFreePort (DhcpSb->UdpIo);\r | |
174 | DhcpSb->UdpIo = NULL;\r | |
175 | }\r | |
176 | \r | |
177 | if (DhcpSb->Timer != NULL) {\r | |
178 | gBS->SetTimer (DhcpSb->Timer, TimerCancel, 0);\r | |
179 | gBS->CloseEvent (DhcpSb->Timer);\r | |
180 | \r | |
181 | DhcpSb->Timer = NULL;\r | |
182 | }\r | |
183 | \r | |
184 | return EFI_SUCCESS;\r | |
185 | }\r | |
186 | \r | |
187 | \r | |
188 | \r | |
189 | /**\r | |
190 | Create a new DHCP service binding instance for the controller.\r | |
191 | \r | |
192 | @param Controller The controller to install DHCP service binding\r | |
193 | protocol onto\r | |
194 | @param ImageHandle The driver's image handle\r | |
195 | @param Service The variable to receive the created DHCP service\r | |
196 | instance.\r | |
197 | \r | |
198 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resource .\r | |
199 | @retval EFI_SUCCESS The DHCP service instance is created.\r | |
200 | \r | |
201 | **/\r | |
202 | EFI_STATUS\r | |
203 | Dhcp4CreateService (\r | |
204 | IN EFI_HANDLE Controller,\r | |
205 | IN EFI_HANDLE ImageHandle,\r | |
206 | OUT DHCP_SERVICE **Service\r | |
207 | )\r | |
208 | {\r | |
209 | DHCP_SERVICE *DhcpSb;\r | |
210 | EFI_STATUS Status;\r | |
211 | \r | |
212 | *Service = NULL;\r | |
213 | DhcpSb = NetAllocateZeroPool (sizeof (DHCP_SERVICE));\r | |
214 | \r | |
215 | if (DhcpSb == NULL) {\r | |
216 | return EFI_OUT_OF_RESOURCES;\r | |
217 | }\r | |
218 | \r | |
219 | DhcpSb->Signature = DHCP_SERVICE_SIGNATURE;\r | |
220 | DhcpSb->ServiceBinding = mDhcp4ServiceBindingTemplete;\r | |
221 | DhcpSb->ServiceState = DHCP_UNCONFIGED;\r | |
222 | DhcpSb->InDestory = FALSE;\r | |
223 | DhcpSb->Controller = Controller;\r | |
224 | DhcpSb->Image = ImageHandle;\r | |
225 | NetListInit (&DhcpSb->Children);\r | |
226 | DhcpSb->DhcpState = Dhcp4Stopped;\r | |
227 | DhcpSb->Xid = NET_RANDOM (NetRandomInitSeed ());\r | |
228 | \r | |
229 | //\r | |
230 | // Create various resources, UdpIo, Timer, and get Mac address\r | |
231 | //\r | |
232 | Status = gBS->CreateEvent (\r | |
233 | EVT_NOTIFY_SIGNAL | EVT_TIMER,\r | |
234 | TPL_CALLBACK,\r | |
235 | DhcpOnTimerTick,\r | |
236 | DhcpSb,\r | |
237 | &DhcpSb->Timer\r | |
238 | );\r | |
239 | \r | |
240 | if (EFI_ERROR (Status)) {\r | |
241 | goto ON_ERROR;\r | |
242 | }\r | |
243 | \r | |
244 | DhcpSb->UdpIo = UdpIoCreatePort (Controller, ImageHandle, DhcpConfigUdpIo, NULL);\r | |
245 | \r | |
246 | if (DhcpSb->UdpIo == NULL) {\r | |
247 | Status = EFI_OUT_OF_RESOURCES;\r | |
248 | goto ON_ERROR;\r | |
249 | }\r | |
250 | \r | |
251 | DhcpSb->HwLen = (UINT8) DhcpSb->UdpIo->SnpMode.HwAddressSize;\r | |
252 | DhcpSb->HwType = DhcpSb->UdpIo->SnpMode.IfType;\r | |
253 | CopyMem (&DhcpSb->Mac, &DhcpSb->UdpIo->SnpMode.CurrentAddress, sizeof (EFI_MAC_ADDRESS));\r | |
254 | \r | |
255 | *Service = DhcpSb;\r | |
256 | return EFI_SUCCESS;\r | |
257 | \r | |
258 | ON_ERROR:\r | |
259 | Dhcp4CloseService (DhcpSb);\r | |
260 | NetFreePool (DhcpSb);\r | |
261 | \r | |
262 | return Status;\r | |
263 | }\r | |
264 | \r | |
265 | \r | |
266 | /**\r | |
267 | Start this driver on ControllerHandle.\r | |
268 | \r | |
269 | @param This Protocol instance pointer.\r | |
270 | @param ControllerHandle Handle of device to bind driver to\r | |
271 | @param RemainingDevicePath Optional parameter use to pick a specific child\r | |
272 | device to start.\r | |
273 | \r | |
274 | @retval EFI_SUCCES This driver is added to ControllerHandle\r | |
275 | @retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle\r | |
276 | @retval other This driver does not support this device\r | |
277 | \r | |
278 | **/\r | |
279 | EFI_STATUS\r | |
280 | EFIAPI\r | |
281 | Dhcp4DriverBindingStart (\r | |
282 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
283 | IN EFI_HANDLE ControllerHandle,\r | |
284 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r | |
285 | )\r | |
286 | {\r | |
287 | DHCP_SERVICE *DhcpSb;\r | |
288 | EFI_STATUS Status;\r | |
289 | \r | |
290 | //\r | |
291 | // First: test for the DHCP4 Protocol\r | |
292 | //\r | |
293 | Status = gBS->OpenProtocol (\r | |
294 | ControllerHandle,\r | |
295 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
296 | NULL,\r | |
297 | This->DriverBindingHandle,\r | |
298 | ControllerHandle,\r | |
299 | EFI_OPEN_PROTOCOL_TEST_PROTOCOL\r | |
300 | );\r | |
301 | \r | |
302 | if (Status == EFI_SUCCESS) {\r | |
303 | return EFI_ALREADY_STARTED;\r | |
304 | }\r | |
305 | \r | |
306 | Status = Dhcp4CreateService (ControllerHandle, This->DriverBindingHandle, &DhcpSb);\r | |
307 | \r | |
308 | if (EFI_ERROR (Status)) {\r | |
309 | return Status;\r | |
310 | }\r | |
311 | \r | |
312 | Status = gBS->SetTimer (DhcpSb->Timer, TimerPeriodic, TICKS_PER_SECOND);\r | |
313 | \r | |
314 | if (EFI_ERROR (Status)) {\r | |
315 | goto ON_ERROR;\r | |
316 | }\r | |
317 | \r | |
318 | //\r | |
319 | // Install the Dhcp4ServiceBinding Protocol onto ControlerHandle\r | |
320 | //\r | |
321 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
322 | &ControllerHandle,\r | |
323 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
324 | &DhcpSb->ServiceBinding,\r | |
325 | NULL\r | |
326 | );\r | |
327 | \r | |
328 | if (EFI_ERROR (Status)) {\r | |
329 | goto ON_ERROR;\r | |
330 | }\r | |
331 | \r | |
332 | return Status;\r | |
333 | \r | |
334 | ON_ERROR:\r | |
335 | Dhcp4CloseService (DhcpSb);\r | |
336 | NetFreePool (DhcpSb);\r | |
337 | return Status;\r | |
338 | }\r | |
339 | \r | |
340 | \r | |
341 | /**\r | |
342 | Stop this driver on ControllerHandle.\r | |
343 | \r | |
344 | @param This Protocol instance pointer.\r | |
345 | @param ControllerHandle Handle of device to stop driver on\r | |
346 | @param NumberOfChildren Number of Handles in ChildHandleBuffer. If number\r | |
347 | of children is zero stop the entire bus driver.\r | |
348 | @param ChildHandleBuffer List of Child Handles to Stop.\r | |
349 | \r | |
350 | @retval EFI_SUCCES This driver is removed ControllerHandle\r | |
351 | @retval other This driver was not removed from this device\r | |
352 | \r | |
353 | **/\r | |
354 | EFI_STATUS\r | |
355 | EFIAPI\r | |
356 | Dhcp4DriverBindingStop (\r | |
357 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
358 | IN EFI_HANDLE ControllerHandle,\r | |
359 | IN UINTN NumberOfChildren,\r | |
360 | IN EFI_HANDLE *ChildHandleBuffer\r | |
361 | )\r | |
362 | {\r | |
363 | EFI_SERVICE_BINDING_PROTOCOL *ServiceBinding;\r | |
364 | DHCP_SERVICE *DhcpSb;\r | |
365 | DHCP_PROTOCOL *Instance;\r | |
366 | EFI_HANDLE NicHandle;\r | |
367 | EFI_STATUS Status;\r | |
368 | EFI_TPL OldTpl;\r | |
369 | \r | |
370 | //\r | |
371 | // DHCP driver opens UDP child, So, the ControllerHandle is the\r | |
372 | // UDP child handle. locate the Nic handle first.\r | |
373 | //\r | |
374 | NicHandle = NetLibGetNicHandle (ControllerHandle, &gEfiUdp4ProtocolGuid);\r | |
375 | \r | |
376 | if (NicHandle == NULL) {\r | |
377 | return EFI_SUCCESS;\r | |
378 | }\r | |
379 | \r | |
380 | Status = gBS->OpenProtocol (\r | |
381 | NicHandle,\r | |
382 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
383 | (VOID **) &ServiceBinding,\r | |
384 | This->DriverBindingHandle,\r | |
385 | NicHandle,\r | |
386 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
387 | );\r | |
388 | \r | |
389 | if (EFI_ERROR (Status)) {\r | |
390 | return EFI_DEVICE_ERROR;\r | |
391 | }\r | |
392 | \r | |
393 | DhcpSb = DHCP_SERVICE_FROM_THIS (ServiceBinding);\r | |
394 | \r | |
395 | if (DhcpSb->InDestory) {\r | |
396 | return EFI_SUCCESS;\r | |
397 | }\r | |
398 | \r | |
399 | OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);\r | |
400 | DhcpSb->InDestory = TRUE;\r | |
401 | \r | |
402 | //\r | |
403 | // Don't use NET_LIST_FOR_EACH_SAFE here, Dhcp4ServiceBindingDestoryChild\r | |
404 | // may cause other child to be deleted.\r | |
405 | //\r | |
406 | while (!NetListIsEmpty (&DhcpSb->Children)) {\r | |
407 | Instance = NET_LIST_HEAD (&DhcpSb->Children, DHCP_PROTOCOL, Link);\r | |
408 | Dhcp4ServiceBindingDestroyChild (ServiceBinding, Instance->Handle);\r | |
409 | }\r | |
410 | \r | |
411 | if (DhcpSb->NumChildren != 0) {\r | |
412 | Status = EFI_DEVICE_ERROR;\r | |
413 | goto ON_ERROR;\r | |
414 | }\r | |
415 | \r | |
416 | DhcpSb->ServiceState = DHCP_DESTORY;\r | |
417 | \r | |
418 | Status = gBS->UninstallProtocolInterface (\r | |
419 | NicHandle,\r | |
420 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
421 | ServiceBinding\r | |
422 | );\r | |
423 | \r | |
424 | if (EFI_ERROR (Status)) {\r | |
425 | goto ON_ERROR;\r | |
426 | }\r | |
427 | \r | |
428 | Dhcp4CloseService (DhcpSb);\r | |
429 | NET_RESTORE_TPL (OldTpl);\r | |
430 | \r | |
431 | NetFreePool (DhcpSb);\r | |
432 | return EFI_SUCCESS;\r | |
433 | \r | |
434 | ON_ERROR:\r | |
435 | DhcpSb->InDestory = FALSE;\r | |
436 | NET_RESTORE_TPL (OldTpl);\r | |
437 | return Status;\r | |
438 | }\r | |
439 | \r | |
440 | \r | |
441 | /**\r | |
442 | Initialize a new DHCP child\r | |
443 | \r | |
444 | @param DhcpSb The dhcp service instance\r | |
445 | @param Instance The dhcp instance to initialize\r | |
446 | \r | |
447 | @return None\r | |
448 | \r | |
449 | **/\r | |
450 | VOID\r | |
451 | DhcpInitProtocol (\r | |
452 | IN DHCP_SERVICE *DhcpSb,\r | |
453 | IN DHCP_PROTOCOL *Instance\r | |
454 | )\r | |
455 | {\r | |
456 | Instance->Signature = DHCP_PROTOCOL_SIGNATURE;\r | |
457 | CopyMem (&Instance->Dhcp4Protocol, &mDhcp4ProtocolTemplate, sizeof (EFI_DHCP4_PROTOCOL));\r | |
458 | NetListInit (&Instance->Link);\r | |
459 | Instance->Handle = NULL;\r | |
460 | Instance->Service = DhcpSb;\r | |
461 | Instance->InDestory = FALSE;\r | |
462 | Instance->CompletionEvent = NULL;\r | |
463 | Instance->RenewRebindEvent = NULL;\r | |
464 | Instance->Token = NULL;\r | |
465 | }\r | |
466 | \r | |
467 | \r | |
468 | /**\r | |
469 | Creates a child handle with a set of DHCP4 services.\r | |
470 | \r | |
471 | @param This Protocol instance pointer.\r | |
472 | @param ChildHandle Pointer to the handle of the child to create. If\r | |
473 | it is NULL, then a new handle is created. If it\r | |
474 | is not NULL, then the DHCP4 services are added to\r | |
475 | the existing child handle.\r | |
476 | \r | |
477 | @retval EFI_SUCCES The child handle was created with the DHCP4\r | |
478 | services\r | |
479 | @retval EFI_OUT_OF_RESOURCES There are not enough resources to create the child\r | |
480 | @retval other The child handle was not created\r | |
481 | \r | |
482 | **/\r | |
483 | EFI_STATUS\r | |
484 | EFIAPI\r | |
485 | Dhcp4ServiceBindingCreateChild (\r | |
486 | IN EFI_SERVICE_BINDING_PROTOCOL *This,\r | |
487 | IN EFI_HANDLE *ChildHandle\r | |
488 | )\r | |
489 | {\r | |
490 | DHCP_SERVICE *DhcpSb;\r | |
491 | DHCP_PROTOCOL *Instance;\r | |
492 | EFI_STATUS Status;\r | |
493 | EFI_TPL OldTpl;\r | |
494 | VOID *Udp4;\r | |
495 | \r | |
496 | if ((This == NULL) || (ChildHandle == NULL)) {\r | |
497 | return EFI_INVALID_PARAMETER;\r | |
498 | }\r | |
499 | \r | |
500 | Instance = NetAllocatePool (sizeof (*Instance));\r | |
501 | \r | |
502 | if (Instance == NULL) {\r | |
503 | return EFI_OUT_OF_RESOURCES;\r | |
504 | }\r | |
505 | \r | |
506 | DhcpSb = DHCP_SERVICE_FROM_THIS (This);\r | |
507 | DhcpInitProtocol (DhcpSb, Instance);\r | |
508 | \r | |
509 | //\r | |
510 | // Install DHCP4 onto ChildHandle\r | |
511 | //\r | |
512 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
513 | ChildHandle,\r | |
514 | &gEfiDhcp4ProtocolGuid,\r | |
515 | &Instance->Dhcp4Protocol,\r | |
516 | NULL\r | |
517 | );\r | |
518 | \r | |
519 | if (EFI_ERROR (Status)) {\r | |
520 | NetFreePool (Instance);\r | |
521 | return Status;\r | |
522 | }\r | |
523 | \r | |
524 | Instance->Handle = *ChildHandle;\r | |
525 | \r | |
526 | //\r | |
527 | // Open the Udp4 protocol BY_CHILD.\r | |
528 | //\r | |
529 | Status = gBS->OpenProtocol (\r | |
530 | DhcpSb->UdpIo->UdpHandle,\r | |
531 | &gEfiUdp4ProtocolGuid,\r | |
532 | (VOID **) &Udp4,\r | |
533 | gDhcp4DriverBinding.DriverBindingHandle,\r | |
534 | Instance->Handle,\r | |
535 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
536 | );\r | |
537 | if (EFI_ERROR (Status)) {\r | |
538 | gBS->UninstallMultipleProtocolInterfaces (\r | |
539 | Instance->Handle,\r | |
540 | &gEfiDhcp4ProtocolGuid,\r | |
541 | &Instance->Dhcp4Protocol,\r | |
542 | NULL\r | |
543 | );\r | |
544 | \r | |
545 | NetFreePool (Instance);\r | |
546 | return Status;\r | |
547 | }\r | |
548 | \r | |
549 | OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);\r | |
550 | \r | |
551 | NetListInsertTail (&DhcpSb->Children, &Instance->Link);\r | |
552 | DhcpSb->NumChildren++;\r | |
553 | \r | |
554 | NET_RESTORE_TPL (OldTpl);\r | |
555 | \r | |
556 | return EFI_SUCCESS;\r | |
557 | }\r | |
558 | \r | |
559 | \r | |
560 | /**\r | |
561 | Destroys a child handle with a set of DHCP4 services.\r | |
562 | \r | |
563 | @param This Protocol instance pointer.\r | |
564 | @param ChildHandle Handle of the child to destroy\r | |
565 | \r | |
566 | @retval EFI_SUCCES The DHCP4 service is removed from the child handle\r | |
567 | @retval EFI_UNSUPPORTED The child handle does not support the DHCP4\r | |
568 | service\r | |
569 | @retval EFI_INVALID_PARAMETER Child handle is not a valid EFI Handle.\r | |
570 | @retval EFI_ACCESS_DENIED The child handle could not be destroyed because\r | |
571 | its DHCP4 services are being used.\r | |
572 | @retval other The child handle was not destroyed\r | |
573 | \r | |
574 | **/\r | |
575 | EFI_STATUS\r | |
576 | EFIAPI\r | |
577 | Dhcp4ServiceBindingDestroyChild (\r | |
578 | IN EFI_SERVICE_BINDING_PROTOCOL *This,\r | |
579 | IN EFI_HANDLE ChildHandle\r | |
580 | )\r | |
581 | {\r | |
582 | DHCP_SERVICE *DhcpSb;\r | |
583 | DHCP_PROTOCOL *Instance;\r | |
584 | EFI_DHCP4_PROTOCOL *Dhcp;\r | |
585 | EFI_TPL OldTpl;\r | |
586 | EFI_STATUS Status;\r | |
587 | \r | |
588 | if ((This == NULL) || (ChildHandle == NULL)) {\r | |
589 | return EFI_INVALID_PARAMETER;\r | |
590 | }\r | |
591 | \r | |
592 | //\r | |
593 | // Retrieve the private context data structures\r | |
594 | //\r | |
595 | Status = gBS->OpenProtocol (\r | |
596 | ChildHandle,\r | |
597 | &gEfiDhcp4ProtocolGuid,\r | |
598 | (VOID **) &Dhcp,\r | |
599 | gDhcp4DriverBinding.DriverBindingHandle,\r | |
600 | ChildHandle,\r | |
601 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
602 | );\r | |
603 | \r | |
604 | if (EFI_ERROR (Status)) {\r | |
605 | return EFI_UNSUPPORTED;\r | |
606 | }\r | |
607 | \r | |
608 | Instance = DHCP_INSTANCE_FROM_THIS (Dhcp);\r | |
609 | DhcpSb = DHCP_SERVICE_FROM_THIS (This);\r | |
610 | \r | |
611 | if (Instance->Service != DhcpSb) {\r | |
612 | return EFI_INVALID_PARAMETER;\r | |
613 | }\r | |
614 | \r | |
615 | //\r | |
616 | // A child can be destoried more than once. For example,\r | |
617 | // Dhcp4DriverBindingStop will destory all of its children.\r | |
618 | // when caller driver is being stopped, it will destory the\r | |
619 | // dhcp child it opens.\r | |
620 | //\r | |
621 | if (Instance->InDestory) {\r | |
622 | return EFI_SUCCESS;\r | |
623 | }\r | |
624 | \r | |
625 | OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);\r | |
626 | Instance->InDestory = TRUE;\r | |
627 | \r | |
628 | //\r | |
629 | // Close the Udp4 protocol.\r | |
630 | //\r | |
631 | gBS->CloseProtocol (\r | |
632 | DhcpSb->UdpIo->UdpHandle,\r | |
633 | &gEfiUdp4ProtocolGuid,\r | |
634 | gDhcp4DriverBinding.DriverBindingHandle,\r | |
635 | ChildHandle\r | |
636 | );\r | |
637 | \r | |
638 | //\r | |
639 | // Uninstall the DHCP4 protocol first to enable a top down destruction.\r | |
640 | //\r | |
641 | Status = gBS->UninstallProtocolInterface (\r | |
642 | ChildHandle,\r | |
643 | &gEfiDhcp4ProtocolGuid,\r | |
644 | Dhcp\r | |
645 | );\r | |
646 | \r | |
647 | if (EFI_ERROR (Status)) {\r | |
648 | Instance->InDestory = FALSE;\r | |
649 | \r | |
650 | NET_RESTORE_TPL (OldTpl);\r | |
651 | return Status;\r | |
652 | }\r | |
653 | \r | |
654 | if (DhcpSb->ActiveChild == Instance) {\r | |
655 | DhcpYieldControl (DhcpSb);\r | |
656 | }\r | |
657 | \r | |
658 | NetListRemoveEntry (&Instance->Link);\r | |
659 | DhcpSb->NumChildren--;\r | |
660 | \r | |
661 | NET_RESTORE_TPL (OldTpl);\r | |
662 | \r | |
663 | NetFreePool (Instance);\r | |
664 | return EFI_SUCCESS;\r | |
665 | }\r |