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772db4bb | 1 | /** @file\r |
2 | \r | |
e5eed7d3 HT |
3 | Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r |
4 | This program and the accompanying materials\r | |
772db4bb | 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 | |
e798cd87 | 117 | EFIAPI\r |
772db4bb | 118 | DhcpConfigUdpIo (\r |
b45b45b2 | 119 | IN UDP_IO *UdpIo,\r |
772db4bb | 120 | IN VOID *Context\r |
121 | )\r | |
122 | {\r | |
123 | EFI_UDP4_CONFIG_DATA UdpConfigData;\r | |
124 | \r | |
125 | UdpConfigData.AcceptBroadcast = TRUE;\r | |
126 | UdpConfigData.AcceptPromiscuous = FALSE;\r | |
127 | UdpConfigData.AcceptAnyPort = FALSE;\r | |
128 | UdpConfigData.AllowDuplicatePort = TRUE;\r | |
129 | UdpConfigData.TypeOfService = 0;\r | |
130 | UdpConfigData.TimeToLive = 64;\r | |
131 | UdpConfigData.DoNotFragment = FALSE;\r | |
132 | UdpConfigData.ReceiveTimeout = 0;\r | |
133 | UdpConfigData.TransmitTimeout = 0;\r | |
134 | \r | |
135 | UdpConfigData.UseDefaultAddress = FALSE;\r | |
136 | UdpConfigData.StationPort = DHCP_CLIENT_PORT;\r | |
137 | UdpConfigData.RemotePort = DHCP_SERVER_PORT;\r | |
138 | \r | |
e48e37fc | 139 | ZeroMem (&UdpConfigData.StationAddress, sizeof (EFI_IPv4_ADDRESS));\r |
140 | ZeroMem (&UdpConfigData.SubnetMask, sizeof (EFI_IPv4_ADDRESS));\r | |
141 | ZeroMem (&UdpConfigData.RemoteAddress, sizeof (EFI_IPv4_ADDRESS));\r | |
772db4bb | 142 | \r |
b45b45b2 | 143 | return UdpIo->Protocol.Udp4->Configure (UdpIo->Protocol.Udp4, &UdpConfigData);;\r |
772db4bb | 144 | }\r |
145 | \r | |
146 | \r | |
147 | \r | |
148 | /**\r | |
149 | Destory the DHCP service. The Dhcp4 service may be partly initialized,\r | |
f9204641 | 150 | or partly destroyed. If a resource is destroyed, it is marked as so in\r |
151 | case the destroy failed and being called again later.\r | |
772db4bb | 152 | \r |
3e8c18da | 153 | @param[in] DhcpSb The DHCP service instance to destory.\r |
772db4bb | 154 | \r |
f9204641 | 155 | @retval EFI_SUCCESS Always return success.\r |
772db4bb | 156 | \r |
157 | **/\r | |
158 | EFI_STATUS\r | |
159 | Dhcp4CloseService (\r | |
160 | IN DHCP_SERVICE *DhcpSb\r | |
161 | )\r | |
162 | {\r | |
163 | DhcpCleanLease (DhcpSb);\r | |
164 | \r | |
165 | if (DhcpSb->UdpIo != NULL) {\r | |
b45b45b2 | 166 | UdpIoFreeIo (DhcpSb->UdpIo);\r |
772db4bb | 167 | DhcpSb->UdpIo = NULL;\r |
168 | }\r | |
169 | \r | |
170 | if (DhcpSb->Timer != NULL) {\r | |
171 | gBS->SetTimer (DhcpSb->Timer, TimerCancel, 0);\r | |
172 | gBS->CloseEvent (DhcpSb->Timer);\r | |
173 | \r | |
174 | DhcpSb->Timer = NULL;\r | |
175 | }\r | |
176 | \r | |
177 | return EFI_SUCCESS;\r | |
178 | }\r | |
179 | \r | |
180 | \r | |
181 | \r | |
182 | /**\r | |
183 | Create a new DHCP service binding instance for the controller.\r | |
184 | \r | |
3e8c18da | 185 | @param[in] Controller The controller to install DHCP service binding\r |
186 | protocol onto\r | |
187 | @param[in] ImageHandle The driver's image handle\r | |
188 | @param[out] Service The variable to receive the created DHCP service\r | |
189 | instance.\r | |
772db4bb | 190 | \r |
191 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resource .\r | |
192 | @retval EFI_SUCCESS The DHCP service instance is created.\r | |
f9204641 | 193 | @retval other Other error occurs.\r |
772db4bb | 194 | \r |
195 | **/\r | |
196 | EFI_STATUS\r | |
197 | Dhcp4CreateService (\r | |
198 | IN EFI_HANDLE Controller,\r | |
199 | IN EFI_HANDLE ImageHandle,\r | |
200 | OUT DHCP_SERVICE **Service\r | |
201 | )\r | |
202 | {\r | |
203 | DHCP_SERVICE *DhcpSb;\r | |
204 | EFI_STATUS Status;\r | |
205 | \r | |
206 | *Service = NULL;\r | |
e48e37fc | 207 | DhcpSb = AllocateZeroPool (sizeof (DHCP_SERVICE));\r |
772db4bb | 208 | \r |
209 | if (DhcpSb == NULL) {\r | |
210 | return EFI_OUT_OF_RESOURCES;\r | |
211 | }\r | |
212 | \r | |
213 | DhcpSb->Signature = DHCP_SERVICE_SIGNATURE;\r | |
772db4bb | 214 | DhcpSb->ServiceState = DHCP_UNCONFIGED;\r |
215 | DhcpSb->InDestory = FALSE;\r | |
216 | DhcpSb->Controller = Controller;\r | |
217 | DhcpSb->Image = ImageHandle;\r | |
e48e37fc | 218 | InitializeListHead (&DhcpSb->Children);\r |
772db4bb | 219 | DhcpSb->DhcpState = Dhcp4Stopped;\r |
220 | DhcpSb->Xid = NET_RANDOM (NetRandomInitSeed ());\r | |
f9204641 | 221 | CopyMem (\r |
222 | &DhcpSb->ServiceBinding,\r | |
223 | &mDhcp4ServiceBindingTemplate,\r | |
224 | sizeof (EFI_SERVICE_BINDING_PROTOCOL)\r | |
225 | );\r | |
772db4bb | 226 | //\r |
227 | // Create various resources, UdpIo, Timer, and get Mac address\r | |
228 | //\r | |
229 | Status = gBS->CreateEvent (\r | |
230 | EVT_NOTIFY_SIGNAL | EVT_TIMER,\r | |
e48e37fc | 231 | TPL_CALLBACK,\r |
772db4bb | 232 | DhcpOnTimerTick,\r |
233 | DhcpSb,\r | |
234 | &DhcpSb->Timer\r | |
235 | );\r | |
236 | \r | |
237 | if (EFI_ERROR (Status)) {\r | |
238 | goto ON_ERROR;\r | |
239 | }\r | |
240 | \r | |
b45b45b2 | 241 | DhcpSb->UdpIo = UdpIoCreateIo (\r |
242 | Controller,\r | |
243 | ImageHandle,\r | |
244 | DhcpConfigUdpIo,\r | |
245 | UDP_IO_UDP4_VERSION,\r | |
246 | NULL\r | |
247 | );\r | |
772db4bb | 248 | \r |
249 | if (DhcpSb->UdpIo == NULL) {\r | |
250 | Status = EFI_OUT_OF_RESOURCES;\r | |
251 | goto ON_ERROR;\r | |
252 | }\r | |
253 | \r | |
254 | DhcpSb->HwLen = (UINT8) DhcpSb->UdpIo->SnpMode.HwAddressSize;\r | |
255 | DhcpSb->HwType = DhcpSb->UdpIo->SnpMode.IfType;\r | |
687a2e5f | 256 | CopyMem (&DhcpSb->Mac, &DhcpSb->UdpIo->SnpMode.CurrentAddress, sizeof (DhcpSb->Mac));\r |
772db4bb | 257 | \r |
258 | *Service = DhcpSb;\r | |
259 | return EFI_SUCCESS;\r | |
260 | \r | |
261 | ON_ERROR:\r | |
262 | Dhcp4CloseService (DhcpSb);\r | |
a4df47f1 | 263 | FreePool (DhcpSb);\r |
772db4bb | 264 | \r |
265 | return Status;\r | |
266 | }\r | |
267 | \r | |
268 | \r | |
269 | /**\r | |
f9204641 | 270 | Start this driver on ControllerHandle. This service is called by the\r |
271 | EFI boot service ConnectController(). In order to make\r | |
272 | drivers as small as possible, there are a few calling restrictions for\r | |
273 | this service. ConnectController() must follow these\r | |
274 | calling restrictions. If any other agent wishes to call Start() it\r | |
275 | must also follow these calling restrictions.\r | |
276 | \r | |
3e8c18da | 277 | @param[in] This Protocol instance pointer.\r |
278 | @param[in] ControllerHandle Handle of device to bind driver to\r | |
279 | @param[in] RemainingDevicePath Optional parameter use to pick a specific child\r | |
280 | device to start.\r | |
f9204641 | 281 | \r |
282 | @retval EFI_SUCCESS This driver is added to ControllerHandle\r | |
283 | @retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle\r | |
284 | @retval other This driver does not support this device\r | |
772db4bb | 285 | \r |
286 | **/\r | |
287 | EFI_STATUS\r | |
288 | EFIAPI\r | |
289 | Dhcp4DriverBindingStart (\r | |
290 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
291 | IN EFI_HANDLE ControllerHandle,\r | |
292 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r | |
293 | )\r | |
294 | {\r | |
295 | DHCP_SERVICE *DhcpSb;\r | |
296 | EFI_STATUS Status;\r | |
297 | \r | |
298 | //\r | |
299 | // First: test for the DHCP4 Protocol\r | |
300 | //\r | |
301 | Status = gBS->OpenProtocol (\r | |
302 | ControllerHandle,\r | |
303 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
304 | NULL,\r | |
305 | This->DriverBindingHandle,\r | |
306 | ControllerHandle,\r | |
307 | EFI_OPEN_PROTOCOL_TEST_PROTOCOL\r | |
308 | );\r | |
309 | \r | |
310 | if (Status == EFI_SUCCESS) {\r | |
311 | return EFI_ALREADY_STARTED;\r | |
312 | }\r | |
313 | \r | |
314 | Status = Dhcp4CreateService (ControllerHandle, This->DriverBindingHandle, &DhcpSb);\r | |
315 | \r | |
316 | if (EFI_ERROR (Status)) {\r | |
317 | return Status;\r | |
318 | }\r | |
e2851998 | 319 | ASSERT (DhcpSb != NULL);\r |
772db4bb | 320 | \r |
c5bcc2e2 | 321 | //\r |
322 | // Start the receiving\r | |
323 | //\r | |
324 | Status = UdpIoRecvDatagram (DhcpSb->UdpIo, DhcpInput, DhcpSb, 0);\r | |
325 | \r | |
326 | if (EFI_ERROR (Status)) {\r | |
327 | goto ON_ERROR;\r | |
328 | }\r | |
772db4bb | 329 | Status = gBS->SetTimer (DhcpSb->Timer, TimerPeriodic, TICKS_PER_SECOND);\r |
330 | \r | |
331 | if (EFI_ERROR (Status)) {\r | |
332 | goto ON_ERROR;\r | |
333 | }\r | |
334 | \r | |
335 | //\r | |
336 | // Install the Dhcp4ServiceBinding Protocol onto ControlerHandle\r | |
337 | //\r | |
338 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
339 | &ControllerHandle,\r | |
340 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
341 | &DhcpSb->ServiceBinding,\r | |
342 | NULL\r | |
343 | );\r | |
344 | \r | |
345 | if (EFI_ERROR (Status)) {\r | |
346 | goto ON_ERROR;\r | |
347 | }\r | |
348 | \r | |
349 | return Status;\r | |
350 | \r | |
351 | ON_ERROR:\r | |
352 | Dhcp4CloseService (DhcpSb);\r | |
a4df47f1 | 353 | FreePool (DhcpSb);\r |
772db4bb | 354 | return Status;\r |
355 | }\r | |
356 | \r | |
357 | \r | |
358 | /**\r | |
f9204641 | 359 | Stop this driver on ControllerHandle. This service is called by the\r |
360 | EFI boot service DisconnectController(). In order to\r | |
361 | make drivers as small as possible, there are a few calling\r | |
362 | restrictions for this service. DisconnectController()\r | |
363 | must follow these calling restrictions. If any other agent wishes\r | |
364 | to call Stop() it must also follow these calling restrictions.\r | |
e2851998 | 365 | \r |
3e8c18da | 366 | @param[in] This Protocol instance pointer.\r |
367 | @param[in] ControllerHandle Handle of device to stop driver on\r | |
368 | @param[in] NumberOfChildren Number of Handles in ChildHandleBuffer. If number of\r | |
369 | children is zero stop the entire bus driver.\r | |
370 | @param[in] ChildHandleBuffer List of Child Handles to Stop.\r | |
f9204641 | 371 | \r |
372 | @retval EFI_SUCCESS This driver is removed ControllerHandle\r | |
373 | @retval other This driver was not removed from this device\r | |
772db4bb | 374 | \r |
375 | **/\r | |
376 | EFI_STATUS\r | |
377 | EFIAPI\r | |
378 | Dhcp4DriverBindingStop (\r | |
379 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
380 | IN EFI_HANDLE ControllerHandle,\r | |
381 | IN UINTN NumberOfChildren,\r | |
382 | IN EFI_HANDLE *ChildHandleBuffer\r | |
383 | )\r | |
384 | {\r | |
385 | EFI_SERVICE_BINDING_PROTOCOL *ServiceBinding;\r | |
386 | DHCP_SERVICE *DhcpSb;\r | |
387 | DHCP_PROTOCOL *Instance;\r | |
388 | EFI_HANDLE NicHandle;\r | |
389 | EFI_STATUS Status;\r | |
390 | EFI_TPL OldTpl;\r | |
391 | \r | |
392 | //\r | |
393 | // DHCP driver opens UDP child, So, the ControllerHandle is the\r | |
394 | // UDP child handle. locate the Nic handle first.\r | |
395 | //\r | |
396 | NicHandle = NetLibGetNicHandle (ControllerHandle, &gEfiUdp4ProtocolGuid);\r | |
397 | \r | |
398 | if (NicHandle == NULL) {\r | |
c4a62a12 | 399 | return EFI_DEVICE_ERROR;\r |
772db4bb | 400 | }\r |
401 | \r | |
402 | Status = gBS->OpenProtocol (\r | |
403 | NicHandle,\r | |
404 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
405 | (VOID **) &ServiceBinding,\r | |
406 | This->DriverBindingHandle,\r | |
407 | NicHandle,\r | |
408 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
409 | );\r | |
410 | \r | |
411 | if (EFI_ERROR (Status)) {\r | |
412 | return EFI_DEVICE_ERROR;\r | |
413 | }\r | |
414 | \r | |
415 | DhcpSb = DHCP_SERVICE_FROM_THIS (ServiceBinding);\r | |
416 | \r | |
417 | if (DhcpSb->InDestory) {\r | |
418 | return EFI_SUCCESS;\r | |
419 | }\r | |
420 | \r | |
e48e37fc | 421 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r |
772db4bb | 422 | \r |
c4a62a12 | 423 | if (NumberOfChildren == 0) {\r |
772db4bb | 424 | \r |
c4a62a12 | 425 | DhcpSb->InDestory = TRUE;\r |
426 | DhcpSb->ServiceState = DHCP_DESTORY;\r | |
772db4bb | 427 | \r |
c4a62a12 | 428 | gBS->UninstallProtocolInterface (\r |
429 | NicHandle,\r | |
430 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
431 | ServiceBinding\r | |
432 | );\r | |
772db4bb | 433 | \r |
c4a62a12 | 434 | Dhcp4CloseService (DhcpSb);\r |
435 | \r | |
a4df47f1 | 436 | FreePool (DhcpSb);\r |
c4a62a12 | 437 | } else {\r |
438 | //\r | |
439 | // Don't use NET_LIST_FOR_EACH_SAFE here, Dhcp4ServiceBindingDestoryChild\r | |
440 | // may cause other child to be deleted.\r | |
441 | //\r | |
e48e37fc | 442 | while (!IsListEmpty (&DhcpSb->Children)) {\r |
c4a62a12 | 443 | Instance = NET_LIST_HEAD (&DhcpSb->Children, DHCP_PROTOCOL, Link);\r |
444 | ServiceBinding->DestroyChild (ServiceBinding, Instance->Handle);\r | |
445 | }\r | |
446 | \r | |
447 | if (DhcpSb->NumChildren != 0) {\r | |
448 | Status = EFI_DEVICE_ERROR;\r | |
449 | }\r | |
772db4bb | 450 | }\r |
451 | \r | |
e48e37fc | 452 | gBS->RestoreTPL (OldTpl);\r |
772db4bb | 453 | \r |
772db4bb | 454 | return Status;\r |
455 | }\r | |
456 | \r | |
457 | \r | |
458 | /**\r | |
f9204641 | 459 | Initialize a new DHCP instance.\r |
772db4bb | 460 | \r |
461 | @param DhcpSb The dhcp service instance\r | |
462 | @param Instance The dhcp instance to initialize\r | |
463 | \r | |
772db4bb | 464 | **/\r |
465 | VOID\r | |
466 | DhcpInitProtocol (\r | |
f9204641 | 467 | IN DHCP_SERVICE *DhcpSb,\r |
468 | IN OUT DHCP_PROTOCOL *Instance\r | |
772db4bb | 469 | )\r |
470 | {\r | |
471 | Instance->Signature = DHCP_PROTOCOL_SIGNATURE;\r | |
687a2e5f | 472 | CopyMem (&Instance->Dhcp4Protocol, &mDhcp4ProtocolTemplate, sizeof (Instance->Dhcp4Protocol));\r |
e48e37fc | 473 | InitializeListHead (&Instance->Link);\r |
772db4bb | 474 | Instance->Handle = NULL;\r |
475 | Instance->Service = DhcpSb;\r | |
476 | Instance->InDestory = FALSE;\r | |
477 | Instance->CompletionEvent = NULL;\r | |
478 | Instance->RenewRebindEvent = NULL;\r | |
479 | Instance->Token = NULL;\r | |
c4a62a12 | 480 | Instance->UdpIo = NULL;\r |
481 | NetbufQueInit (&Instance->ResponseQueue);\r | |
772db4bb | 482 | }\r |
483 | \r | |
484 | \r | |
485 | /**\r | |
3e8c18da | 486 | Creates a child handle and installs a protocol.\r |
e2851998 | 487 | \r |
488 | The CreateChild() function installs a protocol on ChildHandle.\r | |
489 | If ChildHandle is a pointer to NULL, then a new handle is created and returned in ChildHandle.\r | |
3e8c18da | 490 | If ChildHandle is not a pointer to NULL, then the protocol installs on the existing ChildHandle.\r |
772db4bb | 491 | \r |
3e8c18da | 492 | @param This Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance.\r |
493 | @param ChildHandle Pointer to the handle of the child to create. If it is NULL,\r | |
e2851998 | 494 | then a new handle is created. If it is a pointer to an existing UEFI handle,\r |
3e8c18da | 495 | then the protocol is added to the existing UEFI handle.\r |
772db4bb | 496 | \r |
3e8c18da | 497 | @retval EFI_SUCCES The protocol was added to ChildHandle.\r |
f9204641 | 498 | @retval EFI_INVALID_PARAMETER ChildHandle is NULL.\r |
499 | @retval EFI_OUT_OF_RESOURCES There are not enough resources availabe to create\r | |
500 | the child\r | |
501 | @retval other The child handle was not created\r | |
772db4bb | 502 | \r |
503 | **/\r | |
504 | EFI_STATUS\r | |
505 | EFIAPI\r | |
506 | Dhcp4ServiceBindingCreateChild (\r | |
507 | IN EFI_SERVICE_BINDING_PROTOCOL *This,\r | |
508 | IN EFI_HANDLE *ChildHandle\r | |
509 | )\r | |
510 | {\r | |
511 | DHCP_SERVICE *DhcpSb;\r | |
512 | DHCP_PROTOCOL *Instance;\r | |
513 | EFI_STATUS Status;\r | |
514 | EFI_TPL OldTpl;\r | |
515 | VOID *Udp4;\r | |
516 | \r | |
517 | if ((This == NULL) || (ChildHandle == NULL)) {\r | |
518 | return EFI_INVALID_PARAMETER;\r | |
519 | }\r | |
520 | \r | |
e48e37fc | 521 | Instance = AllocatePool (sizeof (*Instance));\r |
772db4bb | 522 | \r |
523 | if (Instance == NULL) {\r | |
524 | return EFI_OUT_OF_RESOURCES;\r | |
525 | }\r | |
526 | \r | |
527 | DhcpSb = DHCP_SERVICE_FROM_THIS (This);\r | |
528 | DhcpInitProtocol (DhcpSb, Instance);\r | |
529 | \r | |
530 | //\r | |
531 | // Install DHCP4 onto ChildHandle\r | |
532 | //\r | |
533 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
534 | ChildHandle,\r | |
535 | &gEfiDhcp4ProtocolGuid,\r | |
536 | &Instance->Dhcp4Protocol,\r | |
537 | NULL\r | |
538 | );\r | |
539 | \r | |
540 | if (EFI_ERROR (Status)) {\r | |
a4df47f1 | 541 | FreePool (Instance);\r |
772db4bb | 542 | return Status;\r |
543 | }\r | |
544 | \r | |
545 | Instance->Handle = *ChildHandle;\r | |
546 | \r | |
547 | //\r | |
548 | // Open the Udp4 protocol BY_CHILD.\r | |
549 | //\r | |
550 | Status = gBS->OpenProtocol (\r | |
551 | DhcpSb->UdpIo->UdpHandle,\r | |
552 | &gEfiUdp4ProtocolGuid,\r | |
553 | (VOID **) &Udp4,\r | |
554 | gDhcp4DriverBinding.DriverBindingHandle,\r | |
555 | Instance->Handle,\r | |
556 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
557 | );\r | |
558 | if (EFI_ERROR (Status)) {\r | |
559 | gBS->UninstallMultipleProtocolInterfaces (\r | |
560 | Instance->Handle,\r | |
561 | &gEfiDhcp4ProtocolGuid,\r | |
562 | &Instance->Dhcp4Protocol,\r | |
563 | NULL\r | |
564 | );\r | |
565 | \r | |
a4df47f1 | 566 | FreePool (Instance);\r |
772db4bb | 567 | return Status;\r |
568 | }\r | |
569 | \r | |
e48e37fc | 570 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r |
772db4bb | 571 | \r |
e48e37fc | 572 | InsertTailList (&DhcpSb->Children, &Instance->Link);\r |
772db4bb | 573 | DhcpSb->NumChildren++;\r |
574 | \r | |
e48e37fc | 575 | gBS->RestoreTPL (OldTpl);\r |
772db4bb | 576 | \r |
577 | return EFI_SUCCESS;\r | |
578 | }\r | |
579 | \r | |
580 | \r | |
581 | /**\r | |
3e8c18da | 582 | Destroys a child handle with a protocol installed on it.\r |
e2851998 | 583 | \r |
584 | The DestroyChild() function does the opposite of CreateChild(). It removes a protocol\r | |
585 | that was installed by CreateChild() from ChildHandle. If the removed protocol is the\r | |
3e8c18da | 586 | last protocol on ChildHandle, then ChildHandle is destroyed.\r |
772db4bb | 587 | \r |
3e8c18da | 588 | @param This Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance.\r |
f9204641 | 589 | @param ChildHandle Handle of the child to destroy\r |
772db4bb | 590 | \r |
3e8c18da | 591 | @retval EFI_SUCCES The protocol was removed from ChildHandle.\r |
592 | @retval EFI_UNSUPPORTED ChildHandle does not support the protocol that is being removed.\r | |
593 | @retval EFI_INVALID_PARAMETER Child handle is not a valid UEFI Handle.\r | |
594 | @retval EFI_ACCESS_DENIED The protocol could not be removed from the ChildHandle\r | |
595 | because its services are being used.\r | |
f9204641 | 596 | @retval other The child handle was not destroyed\r |
772db4bb | 597 | \r |
598 | **/\r | |
599 | EFI_STATUS\r | |
600 | EFIAPI\r | |
601 | Dhcp4ServiceBindingDestroyChild (\r | |
602 | IN EFI_SERVICE_BINDING_PROTOCOL *This,\r | |
603 | IN EFI_HANDLE ChildHandle\r | |
604 | )\r | |
605 | {\r | |
606 | DHCP_SERVICE *DhcpSb;\r | |
607 | DHCP_PROTOCOL *Instance;\r | |
608 | EFI_DHCP4_PROTOCOL *Dhcp;\r | |
609 | EFI_TPL OldTpl;\r | |
610 | EFI_STATUS Status;\r | |
611 | \r | |
612 | if ((This == NULL) || (ChildHandle == NULL)) {\r | |
613 | return EFI_INVALID_PARAMETER;\r | |
614 | }\r | |
615 | \r | |
616 | //\r | |
617 | // Retrieve the private context data structures\r | |
618 | //\r | |
619 | Status = gBS->OpenProtocol (\r | |
620 | ChildHandle,\r | |
621 | &gEfiDhcp4ProtocolGuid,\r | |
622 | (VOID **) &Dhcp,\r | |
623 | gDhcp4DriverBinding.DriverBindingHandle,\r | |
624 | ChildHandle,\r | |
625 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
626 | );\r | |
627 | \r | |
628 | if (EFI_ERROR (Status)) {\r | |
629 | return EFI_UNSUPPORTED;\r | |
630 | }\r | |
631 | \r | |
632 | Instance = DHCP_INSTANCE_FROM_THIS (Dhcp);\r | |
633 | DhcpSb = DHCP_SERVICE_FROM_THIS (This);\r | |
634 | \r | |
635 | if (Instance->Service != DhcpSb) {\r | |
636 | return EFI_INVALID_PARAMETER;\r | |
637 | }\r | |
638 | \r | |
639 | //\r | |
f9204641 | 640 | // A child can be destroyed more than once. For example,\r |
641 | // Dhcp4DriverBindingStop will destroy all of its children.\r | |
772db4bb | 642 | // when caller driver is being stopped, it will destory the\r |
643 | // dhcp child it opens.\r | |
644 | //\r | |
645 | if (Instance->InDestory) {\r | |
646 | return EFI_SUCCESS;\r | |
647 | }\r | |
648 | \r | |
e48e37fc | 649 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r |
772db4bb | 650 | Instance->InDestory = TRUE;\r |
651 | \r | |
652 | //\r | |
653 | // Close the Udp4 protocol.\r | |
654 | //\r | |
655 | gBS->CloseProtocol (\r | |
656 | DhcpSb->UdpIo->UdpHandle,\r | |
657 | &gEfiUdp4ProtocolGuid,\r | |
658 | gDhcp4DriverBinding.DriverBindingHandle,\r | |
659 | ChildHandle\r | |
660 | );\r | |
661 | \r | |
662 | //\r | |
663 | // Uninstall the DHCP4 protocol first to enable a top down destruction.\r | |
664 | //\r | |
665 | Status = gBS->UninstallProtocolInterface (\r | |
666 | ChildHandle,\r | |
667 | &gEfiDhcp4ProtocolGuid,\r | |
668 | Dhcp\r | |
669 | );\r | |
670 | \r | |
671 | if (EFI_ERROR (Status)) {\r | |
672 | Instance->InDestory = FALSE;\r | |
673 | \r | |
e48e37fc | 674 | gBS->RestoreTPL (OldTpl);\r |
772db4bb | 675 | return Status;\r |
676 | }\r | |
677 | \r | |
678 | if (DhcpSb->ActiveChild == Instance) {\r | |
679 | DhcpYieldControl (DhcpSb);\r | |
680 | }\r | |
681 | \r | |
e48e37fc | 682 | RemoveEntryList (&Instance->Link);\r |
772db4bb | 683 | DhcpSb->NumChildren--;\r |
684 | \r | |
e48e37fc | 685 | gBS->RestoreTPL (OldTpl);\r |
772db4bb | 686 | \r |
a4df47f1 | 687 | FreePool (Instance);\r |
772db4bb | 688 | return EFI_SUCCESS;\r |
689 | }\r |