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772db4bb | 1 | /** @file\r |
2 | \r | |
e2851998 | 3 | Copyright (c) 2006 - 2010, Intel Corporation.<BR>\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 | |
772db4bb | 12 | **/\r |
13 | \r | |
14 | #include "Dhcp4Impl.h"\r | |
15 | #include "Dhcp4Driver.h"\r | |
16 | \r | |
17 | EFI_DRIVER_BINDING_PROTOCOL gDhcp4DriverBinding = {\r | |
18 | Dhcp4DriverBindingSupported,\r | |
19 | Dhcp4DriverBindingStart,\r | |
20 | Dhcp4DriverBindingStop,\r | |
21 | 0xa,\r | |
22 | NULL,\r | |
23 | NULL\r | |
24 | };\r | |
25 | \r | |
f9204641 | 26 | EFI_SERVICE_BINDING_PROTOCOL mDhcp4ServiceBindingTemplate = {\r |
772db4bb | 27 | Dhcp4ServiceBindingCreateChild,\r |
28 | Dhcp4ServiceBindingDestroyChild\r | |
29 | };\r | |
30 | \r | |
7bce0c5a | 31 | /**\r |
f9204641 | 32 | This is the declaration of an EFI image entry point. This entry point is\r |
33 | the same for UEFI Applications, UEFI OS Loaders, and UEFI Drivers including\r | |
34 | both device drivers and bus drivers.\r | |
e2851998 | 35 | \r |
7bce0c5a | 36 | Entry point of the DHCP driver to install various protocols.\r |
37 | \r | |
3e8c18da | 38 | @param[in] ImageHandle The firmware allocated handle for the UEFI image.\r |
39 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
7bce0c5a | 40 | \r |
f9204641 | 41 | @retval EFI_SUCCESS The operation completed successfully.\r |
42 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r | |
772db4bb | 43 | \r |
7bce0c5a | 44 | **/\r |
772db4bb | 45 | EFI_STATUS\r |
46 | EFIAPI\r | |
47 | Dhcp4DriverEntryPoint (\r | |
48 | IN EFI_HANDLE ImageHandle,\r | |
49 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
50 | )\r | |
772db4bb | 51 | {\r |
83cbd279 | 52 | return EfiLibInstallDriverBindingComponentName2 (\r |
772db4bb | 53 | ImageHandle,\r |
54 | SystemTable,\r | |
55 | &gDhcp4DriverBinding,\r | |
56 | ImageHandle,\r | |
57 | &gDhcp4ComponentName,\r | |
83cbd279 | 58 | &gDhcp4ComponentName2\r |
772db4bb | 59 | );\r |
60 | }\r | |
61 | \r | |
62 | \r | |
63 | /**\r | |
f9204641 | 64 | Test to see if this driver supports ControllerHandle. This service\r |
65 | is called by the EFI boot service ConnectController(). In\r | |
66 | order to make drivers as small as possible, there are a few calling\r | |
67 | restrictions for this service. ConnectController() must\r | |
68 | follow these calling restrictions. If any other agent wishes to call\r | |
69 | Supported() it must also follow these calling restrictions.\r | |
70 | \r | |
3e8c18da | 71 | @param[in] This Protocol instance pointer.\r |
72 | @param[in] ControllerHandle Handle of device to test\r | |
73 | @param[in] RemainingDevicePath Optional parameter use to pick a specific child\r | |
74 | device to start.\r | |
f9204641 | 75 | \r |
76 | @retval EFI_SUCCESS This driver supports this device\r | |
77 | @retval EFI_ALREADY_STARTED This driver is already running on this device\r | |
78 | @retval other This driver does not support this device\r | |
772db4bb | 79 | \r |
80 | **/\r | |
81 | EFI_STATUS\r | |
82 | EFIAPI\r | |
83 | Dhcp4DriverBindingSupported (\r | |
84 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
85 | IN EFI_HANDLE ControllerHandle,\r | |
86 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r | |
87 | )\r | |
88 | {\r | |
89 | EFI_STATUS Status;\r | |
90 | \r | |
91 | Status = gBS->OpenProtocol (\r | |
92 | ControllerHandle,\r | |
93 | &gEfiUdp4ServiceBindingProtocolGuid,\r | |
94 | NULL,\r | |
95 | This->DriverBindingHandle,\r | |
96 | ControllerHandle,\r | |
97 | EFI_OPEN_PROTOCOL_TEST_PROTOCOL\r | |
98 | );\r | |
99 | \r | |
100 | return Status;\r | |
101 | }\r | |
102 | \r | |
103 | \r | |
104 | \r | |
105 | /**\r | |
106 | Configure the default UDP child to receive all the DHCP traffics\r | |
107 | on this network interface.\r | |
108 | \r | |
b45b45b2 | 109 | @param[in] UdpIo The UDP IO to configure\r |
3e8c18da | 110 | @param[in] Context The context to the function\r |
772db4bb | 111 | \r |
b45b45b2 | 112 | @retval EFI_SUCCESS The UDP IO is successfully configured.\r |
772db4bb | 113 | @retval Others Failed to configure the UDP child.\r |
114 | \r | |
115 | **/\r | |
116 | EFI_STATUS\r | |
117 | DhcpConfigUdpIo (\r | |
b45b45b2 | 118 | IN UDP_IO *UdpIo,\r |
772db4bb | 119 | IN VOID *Context\r |
120 | )\r | |
121 | {\r | |
122 | EFI_UDP4_CONFIG_DATA UdpConfigData;\r | |
123 | \r | |
124 | UdpConfigData.AcceptBroadcast = TRUE;\r | |
125 | UdpConfigData.AcceptPromiscuous = FALSE;\r | |
126 | UdpConfigData.AcceptAnyPort = FALSE;\r | |
127 | UdpConfigData.AllowDuplicatePort = TRUE;\r | |
128 | UdpConfigData.TypeOfService = 0;\r | |
129 | UdpConfigData.TimeToLive = 64;\r | |
130 | UdpConfigData.DoNotFragment = FALSE;\r | |
131 | UdpConfigData.ReceiveTimeout = 0;\r | |
132 | UdpConfigData.TransmitTimeout = 0;\r | |
133 | \r | |
134 | UdpConfigData.UseDefaultAddress = FALSE;\r | |
135 | UdpConfigData.StationPort = DHCP_CLIENT_PORT;\r | |
136 | UdpConfigData.RemotePort = DHCP_SERVER_PORT;\r | |
137 | \r | |
e48e37fc | 138 | ZeroMem (&UdpConfigData.StationAddress, sizeof (EFI_IPv4_ADDRESS));\r |
139 | ZeroMem (&UdpConfigData.SubnetMask, sizeof (EFI_IPv4_ADDRESS));\r | |
140 | ZeroMem (&UdpConfigData.RemoteAddress, sizeof (EFI_IPv4_ADDRESS));\r | |
772db4bb | 141 | \r |
b45b45b2 | 142 | return UdpIo->Protocol.Udp4->Configure (UdpIo->Protocol.Udp4, &UdpConfigData);;\r |
772db4bb | 143 | }\r |
144 | \r | |
145 | \r | |
146 | \r | |
147 | /**\r | |
148 | Destory the DHCP service. The Dhcp4 service may be partly initialized,\r | |
f9204641 | 149 | or partly destroyed. If a resource is destroyed, it is marked as so in\r |
150 | case the destroy failed and being called again later.\r | |
772db4bb | 151 | \r |
3e8c18da | 152 | @param[in] DhcpSb The DHCP service instance to destory.\r |
772db4bb | 153 | \r |
f9204641 | 154 | @retval EFI_SUCCESS Always return success.\r |
772db4bb | 155 | \r |
156 | **/\r | |
157 | EFI_STATUS\r | |
158 | Dhcp4CloseService (\r | |
159 | IN DHCP_SERVICE *DhcpSb\r | |
160 | )\r | |
161 | {\r | |
162 | DhcpCleanLease (DhcpSb);\r | |
163 | \r | |
164 | if (DhcpSb->UdpIo != NULL) {\r | |
b45b45b2 | 165 | UdpIoFreeIo (DhcpSb->UdpIo);\r |
772db4bb | 166 | DhcpSb->UdpIo = NULL;\r |
167 | }\r | |
168 | \r | |
169 | if (DhcpSb->Timer != NULL) {\r | |
170 | gBS->SetTimer (DhcpSb->Timer, TimerCancel, 0);\r | |
171 | gBS->CloseEvent (DhcpSb->Timer);\r | |
172 | \r | |
173 | DhcpSb->Timer = NULL;\r | |
174 | }\r | |
175 | \r | |
176 | return EFI_SUCCESS;\r | |
177 | }\r | |
178 | \r | |
179 | \r | |
180 | \r | |
181 | /**\r | |
182 | Create a new DHCP service binding instance for the controller.\r | |
183 | \r | |
3e8c18da | 184 | @param[in] Controller The controller to install DHCP service binding\r |
185 | protocol onto\r | |
186 | @param[in] ImageHandle The driver's image handle\r | |
187 | @param[out] Service The variable to receive the created DHCP service\r | |
188 | instance.\r | |
772db4bb | 189 | \r |
190 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resource .\r | |
191 | @retval EFI_SUCCESS The DHCP service instance is created.\r | |
f9204641 | 192 | @retval other Other error occurs.\r |
772db4bb | 193 | \r |
194 | **/\r | |
195 | EFI_STATUS\r | |
196 | Dhcp4CreateService (\r | |
197 | IN EFI_HANDLE Controller,\r | |
198 | IN EFI_HANDLE ImageHandle,\r | |
199 | OUT DHCP_SERVICE **Service\r | |
200 | )\r | |
201 | {\r | |
202 | DHCP_SERVICE *DhcpSb;\r | |
203 | EFI_STATUS Status;\r | |
204 | \r | |
205 | *Service = NULL;\r | |
e48e37fc | 206 | DhcpSb = AllocateZeroPool (sizeof (DHCP_SERVICE));\r |
772db4bb | 207 | \r |
208 | if (DhcpSb == NULL) {\r | |
209 | return EFI_OUT_OF_RESOURCES;\r | |
210 | }\r | |
211 | \r | |
212 | DhcpSb->Signature = DHCP_SERVICE_SIGNATURE;\r | |
772db4bb | 213 | DhcpSb->ServiceState = DHCP_UNCONFIGED;\r |
214 | DhcpSb->InDestory = FALSE;\r | |
215 | DhcpSb->Controller = Controller;\r | |
216 | DhcpSb->Image = ImageHandle;\r | |
e48e37fc | 217 | InitializeListHead (&DhcpSb->Children);\r |
772db4bb | 218 | DhcpSb->DhcpState = Dhcp4Stopped;\r |
219 | DhcpSb->Xid = NET_RANDOM (NetRandomInitSeed ());\r | |
f9204641 | 220 | CopyMem (\r |
221 | &DhcpSb->ServiceBinding,\r | |
222 | &mDhcp4ServiceBindingTemplate,\r | |
223 | sizeof (EFI_SERVICE_BINDING_PROTOCOL)\r | |
224 | );\r | |
772db4bb | 225 | //\r |
226 | // Create various resources, UdpIo, Timer, and get Mac address\r | |
227 | //\r | |
228 | Status = gBS->CreateEvent (\r | |
229 | EVT_NOTIFY_SIGNAL | EVT_TIMER,\r | |
e48e37fc | 230 | TPL_CALLBACK,\r |
772db4bb | 231 | DhcpOnTimerTick,\r |
232 | DhcpSb,\r | |
233 | &DhcpSb->Timer\r | |
234 | );\r | |
235 | \r | |
236 | if (EFI_ERROR (Status)) {\r | |
237 | goto ON_ERROR;\r | |
238 | }\r | |
239 | \r | |
b45b45b2 | 240 | DhcpSb->UdpIo = UdpIoCreateIo (\r |
241 | Controller,\r | |
242 | ImageHandle,\r | |
243 | DhcpConfigUdpIo,\r | |
244 | UDP_IO_UDP4_VERSION,\r | |
245 | NULL\r | |
246 | );\r | |
772db4bb | 247 | \r |
248 | if (DhcpSb->UdpIo == NULL) {\r | |
249 | Status = EFI_OUT_OF_RESOURCES;\r | |
250 | goto ON_ERROR;\r | |
251 | }\r | |
252 | \r | |
253 | DhcpSb->HwLen = (UINT8) DhcpSb->UdpIo->SnpMode.HwAddressSize;\r | |
254 | DhcpSb->HwType = DhcpSb->UdpIo->SnpMode.IfType;\r | |
687a2e5f | 255 | CopyMem (&DhcpSb->Mac, &DhcpSb->UdpIo->SnpMode.CurrentAddress, sizeof (DhcpSb->Mac));\r |
772db4bb | 256 | \r |
257 | *Service = DhcpSb;\r | |
258 | return EFI_SUCCESS;\r | |
259 | \r | |
260 | ON_ERROR:\r | |
261 | Dhcp4CloseService (DhcpSb);\r | |
a4df47f1 | 262 | FreePool (DhcpSb);\r |
772db4bb | 263 | \r |
264 | return Status;\r | |
265 | }\r | |
266 | \r | |
267 | \r | |
268 | /**\r | |
f9204641 | 269 | Start this driver on ControllerHandle. This service is called by the\r |
270 | EFI boot service ConnectController(). In order to make\r | |
271 | drivers as small as possible, there are a few calling restrictions for\r | |
272 | this service. ConnectController() must follow these\r | |
273 | calling restrictions. If any other agent wishes to call Start() it\r | |
274 | must also follow these calling restrictions.\r | |
275 | \r | |
3e8c18da | 276 | @param[in] This Protocol instance pointer.\r |
277 | @param[in] ControllerHandle Handle of device to bind driver to\r | |
278 | @param[in] RemainingDevicePath Optional parameter use to pick a specific child\r | |
279 | device to start.\r | |
f9204641 | 280 | \r |
281 | @retval EFI_SUCCESS This driver is added to ControllerHandle\r | |
282 | @retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle\r | |
283 | @retval other This driver does not support this device\r | |
772db4bb | 284 | \r |
285 | **/\r | |
286 | EFI_STATUS\r | |
287 | EFIAPI\r | |
288 | Dhcp4DriverBindingStart (\r | |
289 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
290 | IN EFI_HANDLE ControllerHandle,\r | |
291 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r | |
292 | )\r | |
293 | {\r | |
294 | DHCP_SERVICE *DhcpSb;\r | |
295 | EFI_STATUS Status;\r | |
296 | \r | |
297 | //\r | |
298 | // First: test for the DHCP4 Protocol\r | |
299 | //\r | |
300 | Status = gBS->OpenProtocol (\r | |
301 | ControllerHandle,\r | |
302 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
303 | NULL,\r | |
304 | This->DriverBindingHandle,\r | |
305 | ControllerHandle,\r | |
306 | EFI_OPEN_PROTOCOL_TEST_PROTOCOL\r | |
307 | );\r | |
308 | \r | |
309 | if (Status == EFI_SUCCESS) {\r | |
310 | return EFI_ALREADY_STARTED;\r | |
311 | }\r | |
312 | \r | |
313 | Status = Dhcp4CreateService (ControllerHandle, This->DriverBindingHandle, &DhcpSb);\r | |
314 | \r | |
315 | if (EFI_ERROR (Status)) {\r | |
316 | return Status;\r | |
317 | }\r | |
e2851998 | 318 | ASSERT (DhcpSb != NULL);\r |
772db4bb | 319 | \r |
c5bcc2e2 | 320 | //\r |
321 | // Start the receiving\r | |
322 | //\r | |
323 | Status = UdpIoRecvDatagram (DhcpSb->UdpIo, DhcpInput, DhcpSb, 0);\r | |
324 | \r | |
325 | if (EFI_ERROR (Status)) {\r | |
326 | goto ON_ERROR;\r | |
327 | }\r | |
772db4bb | 328 | Status = gBS->SetTimer (DhcpSb->Timer, TimerPeriodic, TICKS_PER_SECOND);\r |
329 | \r | |
330 | if (EFI_ERROR (Status)) {\r | |
331 | goto ON_ERROR;\r | |
332 | }\r | |
333 | \r | |
334 | //\r | |
335 | // Install the Dhcp4ServiceBinding Protocol onto ControlerHandle\r | |
336 | //\r | |
337 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
338 | &ControllerHandle,\r | |
339 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
340 | &DhcpSb->ServiceBinding,\r | |
341 | NULL\r | |
342 | );\r | |
343 | \r | |
344 | if (EFI_ERROR (Status)) {\r | |
345 | goto ON_ERROR;\r | |
346 | }\r | |
347 | \r | |
348 | return Status;\r | |
349 | \r | |
350 | ON_ERROR:\r | |
351 | Dhcp4CloseService (DhcpSb);\r | |
a4df47f1 | 352 | FreePool (DhcpSb);\r |
772db4bb | 353 | return Status;\r |
354 | }\r | |
355 | \r | |
356 | \r | |
357 | /**\r | |
f9204641 | 358 | Stop this driver on ControllerHandle. This service is called by the\r |
359 | EFI boot service DisconnectController(). In order to\r | |
360 | make drivers as small as possible, there are a few calling\r | |
361 | restrictions for this service. DisconnectController()\r | |
362 | must follow these calling restrictions. If any other agent wishes\r | |
363 | to call Stop() it must also follow these calling restrictions.\r | |
e2851998 | 364 | \r |
3e8c18da | 365 | @param[in] This Protocol instance pointer.\r |
366 | @param[in] ControllerHandle Handle of device to stop driver on\r | |
367 | @param[in] NumberOfChildren Number of Handles in ChildHandleBuffer. If number of\r | |
368 | children is zero stop the entire bus driver.\r | |
369 | @param[in] ChildHandleBuffer List of Child Handles to Stop.\r | |
f9204641 | 370 | \r |
371 | @retval EFI_SUCCESS This driver is removed ControllerHandle\r | |
372 | @retval other This driver was not removed from this device\r | |
772db4bb | 373 | \r |
374 | **/\r | |
375 | EFI_STATUS\r | |
376 | EFIAPI\r | |
377 | Dhcp4DriverBindingStop (\r | |
378 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
379 | IN EFI_HANDLE ControllerHandle,\r | |
380 | IN UINTN NumberOfChildren,\r | |
381 | IN EFI_HANDLE *ChildHandleBuffer\r | |
382 | )\r | |
383 | {\r | |
384 | EFI_SERVICE_BINDING_PROTOCOL *ServiceBinding;\r | |
385 | DHCP_SERVICE *DhcpSb;\r | |
386 | DHCP_PROTOCOL *Instance;\r | |
387 | EFI_HANDLE NicHandle;\r | |
388 | EFI_STATUS Status;\r | |
389 | EFI_TPL OldTpl;\r | |
390 | \r | |
391 | //\r | |
392 | // DHCP driver opens UDP child, So, the ControllerHandle is the\r | |
393 | // UDP child handle. locate the Nic handle first.\r | |
394 | //\r | |
395 | NicHandle = NetLibGetNicHandle (ControllerHandle, &gEfiUdp4ProtocolGuid);\r | |
396 | \r | |
397 | if (NicHandle == NULL) {\r | |
c4a62a12 | 398 | return EFI_DEVICE_ERROR;\r |
772db4bb | 399 | }\r |
400 | \r | |
401 | Status = gBS->OpenProtocol (\r | |
402 | NicHandle,\r | |
403 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
404 | (VOID **) &ServiceBinding,\r | |
405 | This->DriverBindingHandle,\r | |
406 | NicHandle,\r | |
407 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
408 | );\r | |
409 | \r | |
410 | if (EFI_ERROR (Status)) {\r | |
411 | return EFI_DEVICE_ERROR;\r | |
412 | }\r | |
413 | \r | |
414 | DhcpSb = DHCP_SERVICE_FROM_THIS (ServiceBinding);\r | |
415 | \r | |
416 | if (DhcpSb->InDestory) {\r | |
417 | return EFI_SUCCESS;\r | |
418 | }\r | |
419 | \r | |
e48e37fc | 420 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r |
772db4bb | 421 | \r |
c4a62a12 | 422 | if (NumberOfChildren == 0) {\r |
772db4bb | 423 | \r |
c4a62a12 | 424 | DhcpSb->InDestory = TRUE;\r |
425 | DhcpSb->ServiceState = DHCP_DESTORY;\r | |
772db4bb | 426 | \r |
c4a62a12 | 427 | gBS->UninstallProtocolInterface (\r |
428 | NicHandle,\r | |
429 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
430 | ServiceBinding\r | |
431 | );\r | |
772db4bb | 432 | \r |
c4a62a12 | 433 | Dhcp4CloseService (DhcpSb);\r |
434 | \r | |
a4df47f1 | 435 | FreePool (DhcpSb);\r |
c4a62a12 | 436 | } else {\r |
437 | //\r | |
438 | // Don't use NET_LIST_FOR_EACH_SAFE here, Dhcp4ServiceBindingDestoryChild\r | |
439 | // may cause other child to be deleted.\r | |
440 | //\r | |
e48e37fc | 441 | while (!IsListEmpty (&DhcpSb->Children)) {\r |
c4a62a12 | 442 | Instance = NET_LIST_HEAD (&DhcpSb->Children, DHCP_PROTOCOL, Link);\r |
443 | ServiceBinding->DestroyChild (ServiceBinding, Instance->Handle);\r | |
444 | }\r | |
445 | \r | |
446 | if (DhcpSb->NumChildren != 0) {\r | |
447 | Status = EFI_DEVICE_ERROR;\r | |
448 | }\r | |
772db4bb | 449 | }\r |
450 | \r | |
e48e37fc | 451 | gBS->RestoreTPL (OldTpl);\r |
772db4bb | 452 | \r |
772db4bb | 453 | return Status;\r |
454 | }\r | |
455 | \r | |
456 | \r | |
457 | /**\r | |
f9204641 | 458 | Initialize a new DHCP instance.\r |
772db4bb | 459 | \r |
460 | @param DhcpSb The dhcp service instance\r | |
461 | @param Instance The dhcp instance to initialize\r | |
462 | \r | |
772db4bb | 463 | **/\r |
464 | VOID\r | |
465 | DhcpInitProtocol (\r | |
f9204641 | 466 | IN DHCP_SERVICE *DhcpSb,\r |
467 | IN OUT DHCP_PROTOCOL *Instance\r | |
772db4bb | 468 | )\r |
469 | {\r | |
470 | Instance->Signature = DHCP_PROTOCOL_SIGNATURE;\r | |
687a2e5f | 471 | CopyMem (&Instance->Dhcp4Protocol, &mDhcp4ProtocolTemplate, sizeof (Instance->Dhcp4Protocol));\r |
e48e37fc | 472 | InitializeListHead (&Instance->Link);\r |
772db4bb | 473 | Instance->Handle = NULL;\r |
474 | Instance->Service = DhcpSb;\r | |
475 | Instance->InDestory = FALSE;\r | |
476 | Instance->CompletionEvent = NULL;\r | |
477 | Instance->RenewRebindEvent = NULL;\r | |
478 | Instance->Token = NULL;\r | |
c4a62a12 | 479 | Instance->UdpIo = NULL;\r |
480 | NetbufQueInit (&Instance->ResponseQueue);\r | |
772db4bb | 481 | }\r |
482 | \r | |
483 | \r | |
484 | /**\r | |
3e8c18da | 485 | Creates a child handle and installs a protocol.\r |
e2851998 | 486 | \r |
487 | The CreateChild() function installs a protocol on ChildHandle.\r | |
488 | If ChildHandle is a pointer to NULL, then a new handle is created and returned in ChildHandle.\r | |
3e8c18da | 489 | If ChildHandle is not a pointer to NULL, then the protocol installs on the existing ChildHandle.\r |
772db4bb | 490 | \r |
3e8c18da | 491 | @param This Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance.\r |
492 | @param ChildHandle Pointer to the handle of the child to create. If it is NULL,\r | |
e2851998 | 493 | then a new handle is created. If it is a pointer to an existing UEFI handle,\r |
3e8c18da | 494 | then the protocol is added to the existing UEFI handle.\r |
772db4bb | 495 | \r |
3e8c18da | 496 | @retval EFI_SUCCES The protocol was added to ChildHandle.\r |
f9204641 | 497 | @retval EFI_INVALID_PARAMETER ChildHandle is NULL.\r |
498 | @retval EFI_OUT_OF_RESOURCES There are not enough resources availabe to create\r | |
499 | the child\r | |
500 | @retval other The child handle was not created\r | |
772db4bb | 501 | \r |
502 | **/\r | |
503 | EFI_STATUS\r | |
504 | EFIAPI\r | |
505 | Dhcp4ServiceBindingCreateChild (\r | |
506 | IN EFI_SERVICE_BINDING_PROTOCOL *This,\r | |
507 | IN EFI_HANDLE *ChildHandle\r | |
508 | )\r | |
509 | {\r | |
510 | DHCP_SERVICE *DhcpSb;\r | |
511 | DHCP_PROTOCOL *Instance;\r | |
512 | EFI_STATUS Status;\r | |
513 | EFI_TPL OldTpl;\r | |
514 | VOID *Udp4;\r | |
515 | \r | |
516 | if ((This == NULL) || (ChildHandle == NULL)) {\r | |
517 | return EFI_INVALID_PARAMETER;\r | |
518 | }\r | |
519 | \r | |
e48e37fc | 520 | Instance = AllocatePool (sizeof (*Instance));\r |
772db4bb | 521 | \r |
522 | if (Instance == NULL) {\r | |
523 | return EFI_OUT_OF_RESOURCES;\r | |
524 | }\r | |
525 | \r | |
526 | DhcpSb = DHCP_SERVICE_FROM_THIS (This);\r | |
527 | DhcpInitProtocol (DhcpSb, Instance);\r | |
528 | \r | |
529 | //\r | |
530 | // Install DHCP4 onto ChildHandle\r | |
531 | //\r | |
532 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
533 | ChildHandle,\r | |
534 | &gEfiDhcp4ProtocolGuid,\r | |
535 | &Instance->Dhcp4Protocol,\r | |
536 | NULL\r | |
537 | );\r | |
538 | \r | |
539 | if (EFI_ERROR (Status)) {\r | |
a4df47f1 | 540 | FreePool (Instance);\r |
772db4bb | 541 | return Status;\r |
542 | }\r | |
543 | \r | |
544 | Instance->Handle = *ChildHandle;\r | |
545 | \r | |
546 | //\r | |
547 | // Open the Udp4 protocol BY_CHILD.\r | |
548 | //\r | |
549 | Status = gBS->OpenProtocol (\r | |
550 | DhcpSb->UdpIo->UdpHandle,\r | |
551 | &gEfiUdp4ProtocolGuid,\r | |
552 | (VOID **) &Udp4,\r | |
553 | gDhcp4DriverBinding.DriverBindingHandle,\r | |
554 | Instance->Handle,\r | |
555 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
556 | );\r | |
557 | if (EFI_ERROR (Status)) {\r | |
558 | gBS->UninstallMultipleProtocolInterfaces (\r | |
559 | Instance->Handle,\r | |
560 | &gEfiDhcp4ProtocolGuid,\r | |
561 | &Instance->Dhcp4Protocol,\r | |
562 | NULL\r | |
563 | );\r | |
564 | \r | |
a4df47f1 | 565 | FreePool (Instance);\r |
772db4bb | 566 | return Status;\r |
567 | }\r | |
568 | \r | |
e48e37fc | 569 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r |
772db4bb | 570 | \r |
e48e37fc | 571 | InsertTailList (&DhcpSb->Children, &Instance->Link);\r |
772db4bb | 572 | DhcpSb->NumChildren++;\r |
573 | \r | |
e48e37fc | 574 | gBS->RestoreTPL (OldTpl);\r |
772db4bb | 575 | \r |
576 | return EFI_SUCCESS;\r | |
577 | }\r | |
578 | \r | |
579 | \r | |
580 | /**\r | |
3e8c18da | 581 | Destroys a child handle with a protocol installed on it.\r |
e2851998 | 582 | \r |
583 | The DestroyChild() function does the opposite of CreateChild(). It removes a protocol\r | |
584 | that was installed by CreateChild() from ChildHandle. If the removed protocol is the\r | |
3e8c18da | 585 | last protocol on ChildHandle, then ChildHandle is destroyed.\r |
772db4bb | 586 | \r |
3e8c18da | 587 | @param This Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance.\r |
f9204641 | 588 | @param ChildHandle Handle of the child to destroy\r |
772db4bb | 589 | \r |
3e8c18da | 590 | @retval EFI_SUCCES The protocol was removed from ChildHandle.\r |
591 | @retval EFI_UNSUPPORTED ChildHandle does not support the protocol that is being removed.\r | |
592 | @retval EFI_INVALID_PARAMETER Child handle is not a valid UEFI Handle.\r | |
593 | @retval EFI_ACCESS_DENIED The protocol could not be removed from the ChildHandle\r | |
594 | because its services are being used.\r | |
f9204641 | 595 | @retval other The child handle was not destroyed\r |
772db4bb | 596 | \r |
597 | **/\r | |
598 | EFI_STATUS\r | |
599 | EFIAPI\r | |
600 | Dhcp4ServiceBindingDestroyChild (\r | |
601 | IN EFI_SERVICE_BINDING_PROTOCOL *This,\r | |
602 | IN EFI_HANDLE ChildHandle\r | |
603 | )\r | |
604 | {\r | |
605 | DHCP_SERVICE *DhcpSb;\r | |
606 | DHCP_PROTOCOL *Instance;\r | |
607 | EFI_DHCP4_PROTOCOL *Dhcp;\r | |
608 | EFI_TPL OldTpl;\r | |
609 | EFI_STATUS Status;\r | |
610 | \r | |
611 | if ((This == NULL) || (ChildHandle == NULL)) {\r | |
612 | return EFI_INVALID_PARAMETER;\r | |
613 | }\r | |
614 | \r | |
615 | //\r | |
616 | // Retrieve the private context data structures\r | |
617 | //\r | |
618 | Status = gBS->OpenProtocol (\r | |
619 | ChildHandle,\r | |
620 | &gEfiDhcp4ProtocolGuid,\r | |
621 | (VOID **) &Dhcp,\r | |
622 | gDhcp4DriverBinding.DriverBindingHandle,\r | |
623 | ChildHandle,\r | |
624 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
625 | );\r | |
626 | \r | |
627 | if (EFI_ERROR (Status)) {\r | |
628 | return EFI_UNSUPPORTED;\r | |
629 | }\r | |
630 | \r | |
631 | Instance = DHCP_INSTANCE_FROM_THIS (Dhcp);\r | |
632 | DhcpSb = DHCP_SERVICE_FROM_THIS (This);\r | |
633 | \r | |
634 | if (Instance->Service != DhcpSb) {\r | |
635 | return EFI_INVALID_PARAMETER;\r | |
636 | }\r | |
637 | \r | |
638 | //\r | |
f9204641 | 639 | // A child can be destroyed more than once. For example,\r |
640 | // Dhcp4DriverBindingStop will destroy all of its children.\r | |
772db4bb | 641 | // when caller driver is being stopped, it will destory the\r |
642 | // dhcp child it opens.\r | |
643 | //\r | |
644 | if (Instance->InDestory) {\r | |
645 | return EFI_SUCCESS;\r | |
646 | }\r | |
647 | \r | |
e48e37fc | 648 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r |
772db4bb | 649 | Instance->InDestory = TRUE;\r |
650 | \r | |
651 | //\r | |
652 | // Close the Udp4 protocol.\r | |
653 | //\r | |
654 | gBS->CloseProtocol (\r | |
655 | DhcpSb->UdpIo->UdpHandle,\r | |
656 | &gEfiUdp4ProtocolGuid,\r | |
657 | gDhcp4DriverBinding.DriverBindingHandle,\r | |
658 | ChildHandle\r | |
659 | );\r | |
660 | \r | |
661 | //\r | |
662 | // Uninstall the DHCP4 protocol first to enable a top down destruction.\r | |
663 | //\r | |
664 | Status = gBS->UninstallProtocolInterface (\r | |
665 | ChildHandle,\r | |
666 | &gEfiDhcp4ProtocolGuid,\r | |
667 | Dhcp\r | |
668 | );\r | |
669 | \r | |
670 | if (EFI_ERROR (Status)) {\r | |
671 | Instance->InDestory = FALSE;\r | |
672 | \r | |
e48e37fc | 673 | gBS->RestoreTPL (OldTpl);\r |
772db4bb | 674 | return Status;\r |
675 | }\r | |
676 | \r | |
677 | if (DhcpSb->ActiveChild == Instance) {\r | |
678 | DhcpYieldControl (DhcpSb);\r | |
679 | }\r | |
680 | \r | |
e48e37fc | 681 | RemoveEntryList (&Instance->Link);\r |
772db4bb | 682 | DhcpSb->NumChildren--;\r |
683 | \r | |
e48e37fc | 684 | gBS->RestoreTPL (OldTpl);\r |
772db4bb | 685 | \r |
a4df47f1 | 686 | FreePool (Instance);\r |
772db4bb | 687 | return EFI_SUCCESS;\r |
688 | }\r |