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8e29a125 | 1 | /** @file\r |
55a64ae0 | 2 | iSCSI DHCP related configuration routines.\r |
6a690e23 | 3 | \r |
8e29a125 | 4 | Copyright (c) 2004 - 2007, Intel Corporation.<BR>\r |
7a444476 | 5 | All rights reserved. This program and the accompanying materials\r |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
6a690e23 | 12 | \r |
12618416 | 13 | **/\r |
6a690e23 | 14 | \r |
15 | #include "IScsiImpl.h"\r | |
16 | \r | |
12618416 | 17 | /**\r |
18 | Extract the Root Path option and get the required target information.\r | |
19 | \r | |
c5de0d55 | 20 | @param[in] RootPath The RootPath.\r |
21 | @param[in] Length Length of the RootPath option payload.\r | |
22 | @param[in, out] ConfigNvData The iSCSI session configuration data read from nonvolatile device.\r | |
12618416 | 23 | \r |
24 | @retval EFI_SUCCESS All required information is extracted from the RootPath option.\r | |
12618416 | 25 | @retval EFI_NOT_FOUND The RootPath is not an iSCSI RootPath.\r |
12618416 | 26 | @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.\r |
12618416 | 27 | @retval EFI_INVALID_PARAMETER The RootPath is mal-formatted.\r |
12618416 | 28 | **/\r |
6a690e23 | 29 | EFI_STATUS\r |
30 | IScsiDhcpExtractRootPath (\r | |
c5de0d55 | 31 | IN CHAR8 *RootPath,\r |
32 | IN UINT8 Length,\r | |
33 | IN OUT ISCSI_SESSION_CONFIG_NVDATA *ConfigNvData\r | |
6a690e23 | 34 | )\r |
6a690e23 | 35 | {\r |
36 | EFI_STATUS Status;\r | |
37 | UINT8 IScsiRootPathIdLen;\r | |
38 | CHAR8 *TmpStr;\r | |
39 | ISCSI_ROOT_PATH_FIELD Fields[RP_FIELD_IDX_MAX];\r | |
40 | ISCSI_ROOT_PATH_FIELD *Field;\r | |
8e29a125 | 41 | RP_FIELD_IDX FieldIndex;\r |
6a690e23 | 42 | UINT8 Index;\r |
43 | \r | |
44 | //\r | |
45 | // "iscsi:"<servername>":"<protocol>":"<port>":"<LUN>":"<targetname>\r | |
46 | //\r | |
47 | IScsiRootPathIdLen = (UINT8) AsciiStrLen (ISCSI_ROOT_PATH_ID);\r | |
48 | \r | |
e48e37fc | 49 | if ((Length <= IScsiRootPathIdLen) || (CompareMem (RootPath, ISCSI_ROOT_PATH_ID, IScsiRootPathIdLen) != 0)) {\r |
6a690e23 | 50 | return EFI_NOT_FOUND;\r |
51 | }\r | |
52 | //\r | |
53 | // Skip the iSCSI RootPath ID "iscsi:".\r | |
54 | //\r | |
55 | RootPath += IScsiRootPathIdLen;\r | |
56 | Length = (UINT8) (Length - IScsiRootPathIdLen);\r | |
57 | \r | |
e48e37fc | 58 | TmpStr = (CHAR8 *) AllocatePool (Length + 1);\r |
6a690e23 | 59 | if (TmpStr == NULL) {\r |
60 | return EFI_OUT_OF_RESOURCES;\r | |
61 | }\r | |
62 | \r | |
e48e37fc | 63 | CopyMem (TmpStr, RootPath, Length);\r |
6a690e23 | 64 | TmpStr[Length] = '\0';\r |
65 | \r | |
66 | Index = 0;\r | |
8e29a125 | 67 | FieldIndex = RP_FIELD_IDX_SERVERNAME;\r |
e48e37fc | 68 | ZeroMem (&Fields[0], sizeof (Fields));\r |
6a690e23 | 69 | \r |
70 | //\r | |
71 | // Extract the fields in the Root Path option string.\r | |
72 | //\r | |
8e29a125 | 73 | for (FieldIndex = RP_FIELD_IDX_SERVERNAME; (FieldIndex < RP_FIELD_IDX_MAX) && (Index < Length); FieldIndex++) {\r |
6a690e23 | 74 | if (TmpStr[Index] != ISCSI_ROOT_PATH_FIELD_DELIMITER) {\r |
75 | Fields[FieldIndex].Str = &TmpStr[Index];\r | |
76 | }\r | |
77 | \r | |
78 | while ((TmpStr[Index] != ISCSI_ROOT_PATH_FIELD_DELIMITER) && (Index < Length)) {\r | |
79 | Index++;\r | |
80 | }\r | |
81 | \r | |
82 | if (TmpStr[Index] == ISCSI_ROOT_PATH_FIELD_DELIMITER) {\r | |
83 | if (FieldIndex != RP_FIELD_IDX_TARGETNAME) {\r | |
84 | TmpStr[Index] = '\0';\r | |
85 | Index++;\r | |
86 | }\r | |
87 | \r | |
88 | if (Fields[FieldIndex].Str != NULL) {\r | |
89 | Fields[FieldIndex].Len = (UINT8) AsciiStrLen (Fields[FieldIndex].Str);\r | |
90 | }\r | |
91 | }\r | |
92 | }\r | |
93 | \r | |
94 | if (FieldIndex != RP_FIELD_IDX_MAX) {\r | |
95 | Status = EFI_INVALID_PARAMETER;\r | |
96 | goto ON_EXIT;\r | |
97 | }\r | |
8e29a125 | 98 | \r |
963dbb30 | 99 | if ((Fields[RP_FIELD_IDX_SERVERNAME].Str == NULL) ||\r |
100 | (Fields[RP_FIELD_IDX_TARGETNAME].Str == NULL) ||\r | |
101 | (Fields[RP_FIELD_IDX_PROTOCOL].Len > 1)\r | |
102 | ) {\r | |
103 | \r | |
6a690e23 | 104 | Status = EFI_INVALID_PARAMETER;\r |
105 | goto ON_EXIT;\r | |
106 | }\r | |
107 | //\r | |
108 | // Get the IP address of the target.\r | |
109 | //\r | |
963dbb30 | 110 | Field = &Fields[RP_FIELD_IDX_SERVERNAME];\r |
6a690e23 | 111 | Status = IScsiAsciiStrToIp (Field->Str, &ConfigNvData->TargetIp);\r |
112 | if (EFI_ERROR (Status)) {\r | |
113 | goto ON_EXIT;\r | |
114 | }\r | |
115 | //\r | |
116 | // Check the protocol type.\r | |
117 | //\r | |
963dbb30 | 118 | Field = &Fields[RP_FIELD_IDX_PROTOCOL];\r |
6a690e23 | 119 | if ((Field->Str != NULL) && ((*(Field->Str) - '0') != EFI_IP_PROTO_TCP)) {\r |
120 | Status = EFI_INVALID_PARAMETER;\r | |
121 | goto ON_EXIT;\r | |
122 | }\r | |
123 | //\r | |
124 | // Get the port of the iSCSI target.\r | |
125 | //\r | |
963dbb30 | 126 | Field = &Fields[RP_FIELD_IDX_PORT];\r |
6a690e23 | 127 | if (Field->Str != NULL) {\r |
128 | ConfigNvData->TargetPort = (UINT16) AsciiStrDecimalToUintn (Field->Str);\r | |
129 | } else {\r | |
130 | ConfigNvData->TargetPort = ISCSI_WELL_KNOWN_PORT;\r | |
131 | }\r | |
132 | //\r | |
133 | // Get the LUN.\r | |
134 | //\r | |
963dbb30 | 135 | Field = &Fields[RP_FIELD_IDX_LUN];\r |
6a690e23 | 136 | if (Field->Str != NULL) {\r |
137 | Status = IScsiAsciiStrToLun (Field->Str, ConfigNvData->BootLun);\r | |
138 | if (EFI_ERROR (Status)) {\r | |
139 | goto ON_EXIT;\r | |
140 | }\r | |
141 | } else {\r | |
e48e37fc | 142 | ZeroMem (ConfigNvData->BootLun, sizeof (ConfigNvData->BootLun));\r |
6a690e23 | 143 | }\r |
144 | //\r | |
145 | // Get the target iSCSI Name.\r | |
146 | //\r | |
963dbb30 | 147 | Field = &Fields[RP_FIELD_IDX_TARGETNAME];\r |
148 | \r | |
6a690e23 | 149 | if (AsciiStrLen (Field->Str) > ISCSI_NAME_MAX_SIZE - 1) {\r |
150 | Status = EFI_INVALID_PARAMETER;\r | |
151 | goto ON_EXIT;\r | |
152 | }\r | |
153 | //\r | |
154 | // Validate the iSCSI name.\r | |
155 | //\r | |
156 | Status = IScsiNormalizeName (Field->Str, AsciiStrLen (Field->Str));\r | |
157 | if (EFI_ERROR (Status)) {\r | |
158 | goto ON_EXIT;\r | |
159 | }\r | |
160 | \r | |
161 | AsciiStrCpy (ConfigNvData->TargetName, Field->Str);\r | |
162 | \r | |
163 | ON_EXIT:\r | |
164 | \r | |
e48e37fc | 165 | gBS->FreePool (TmpStr);\r |
6a690e23 | 166 | \r |
167 | return Status;\r | |
168 | }\r | |
169 | \r | |
12618416 | 170 | /**\r |
171 | The callback function registerd to the DHCP4 instance which is used to select\r | |
172 | the qualified DHCP OFFER.\r | |
173 | \r | |
8e29a125 | 174 | @param[in] This The DHCP4 protocol.\r |
175 | @param[in] Context The context set when configuring the DHCP4 protocol.\r | |
176 | @param[in] CurrentState The current state of the DHCP4 protocol.\r | |
177 | @param[in] Dhcp4Event The event occurs in the current state.\r | |
178 | @param[in] Packet The DHCP packet that is to be sent or already received. \r | |
179 | @param[out] NewPacket The packet used to replace the above Packet.\r | |
180 | \r | |
12618416 | 181 | @retval EFI_SUCCESS Either the DHCP OFFER is qualified or we're not intereseted\r |
182 | in the Dhcp4Event.\r | |
8e29a125 | 183 | @retval EFI_NOT_READY The DHCP OFFER packet doesn't match our requirements.\r |
963dbb30 | 184 | @retval Others Other errors as indicated.\r |
12618416 | 185 | **/\r |
6a690e23 | 186 | EFI_STATUS\r |
187 | IScsiDhcpSelectOffer (\r | |
188 | IN EFI_DHCP4_PROTOCOL * This,\r | |
189 | IN VOID *Context,\r | |
190 | IN EFI_DHCP4_STATE CurrentState,\r | |
191 | IN EFI_DHCP4_EVENT Dhcp4Event,\r | |
192 | IN EFI_DHCP4_PACKET * Packet, OPTIONAL\r | |
193 | OUT EFI_DHCP4_PACKET **NewPacket OPTIONAL\r | |
194 | )\r | |
6a690e23 | 195 | {\r |
196 | EFI_STATUS Status;\r | |
197 | UINT32 OptionCount;\r | |
198 | EFI_DHCP4_PACKET_OPTION **OptionList;\r | |
199 | UINT32 Index;\r | |
200 | \r | |
201 | if ((Dhcp4Event != Dhcp4RcvdOffer) && (Dhcp4Event != Dhcp4SelectOffer)) {\r | |
202 | return EFI_SUCCESS;\r | |
203 | }\r | |
204 | \r | |
205 | OptionCount = 0;\r | |
206 | \r | |
207 | Status = This->Parse (This, Packet, &OptionCount, NULL);\r | |
208 | if (Status != EFI_BUFFER_TOO_SMALL) {\r | |
69b0882d | 209 | return EFI_NOT_READY;\r |
6a690e23 | 210 | }\r |
93e3992d | 211 | \r |
e48e37fc | 212 | OptionList = AllocatePool (OptionCount * sizeof (EFI_DHCP4_PACKET_OPTION *));\r |
6a690e23 | 213 | if (OptionList == NULL) {\r |
214 | return EFI_NOT_READY;\r | |
215 | }\r | |
216 | \r | |
217 | Status = This->Parse (This, Packet, &OptionCount, OptionList);\r | |
218 | if (EFI_ERROR (Status)) {\r | |
e48e37fc | 219 | gBS->FreePool (OptionList);\r |
6a690e23 | 220 | return EFI_NOT_READY;\r |
221 | }\r | |
222 | \r | |
223 | for (Index = 0; Index < OptionCount; Index++) {\r | |
224 | if (OptionList[Index]->OpCode != DHCP4_TAG_ROOT_PATH) {\r | |
225 | continue;\r | |
226 | }\r | |
227 | \r | |
228 | Status = IScsiDhcpExtractRootPath (\r | |
229 | (CHAR8 *) &OptionList[Index]->Data[0],\r | |
230 | OptionList[Index]->Length,\r | |
231 | (ISCSI_SESSION_CONFIG_NVDATA *) Context\r | |
232 | );\r | |
233 | \r | |
234 | break;\r | |
235 | }\r | |
236 | \r | |
237 | if ((Index == OptionCount)) {\r | |
238 | Status = EFI_NOT_READY;\r | |
239 | }\r | |
240 | \r | |
e48e37fc | 241 | gBS->FreePool (OptionList);\r |
6a690e23 | 242 | \r |
243 | return Status;\r | |
244 | }\r | |
245 | \r | |
12618416 | 246 | /**\r |
247 | Parse the DHCP ACK to get the address configuration and DNS information.\r | |
6a690e23 | 248 | \r |
c5de0d55 | 249 | @param[in] Dhcp4 The DHCP4 protocol.\r |
250 | @param[in, out] ConfigData The session configuration data.\r | |
6a690e23 | 251 | \r |
12618416 | 252 | @retval EFI_SUCCESS The DNS information is got from the DHCP ACK.\r |
12618416 | 253 | @retval EFI_NO_MAPPING DHCP failed to acquire address and other information.\r |
12618416 | 254 | @retval EFI_INVALID_PARAMETER The DHCP ACK's DNS option is mal-formatted.\r |
963dbb30 | 255 | @retval EFI_DEVICE_ERROR Other errors as indicated.\r |
12618416 | 256 | **/\r |
257 | EFI_STATUS\r | |
258 | IScsiParseDhcpAck (\r | |
c5de0d55 | 259 | IN EFI_DHCP4_PROTOCOL *Dhcp4,\r |
260 | IN OUT ISCSI_SESSION_CONFIG_DATA *ConfigData\r | |
12618416 | 261 | )\r |
6a690e23 | 262 | {\r |
263 | EFI_STATUS Status;\r | |
264 | EFI_DHCP4_MODE_DATA Dhcp4ModeData;\r | |
265 | UINT32 OptionCount;\r | |
266 | EFI_DHCP4_PACKET_OPTION **OptionList;\r | |
267 | UINT32 Index;\r | |
268 | \r | |
269 | Status = Dhcp4->GetModeData (Dhcp4, &Dhcp4ModeData);\r | |
270 | if (EFI_ERROR (Status)) {\r | |
271 | return Status;\r | |
272 | }\r | |
273 | \r | |
274 | if (Dhcp4ModeData.State != Dhcp4Bound) {\r | |
275 | return EFI_NO_MAPPING;\r | |
276 | }\r | |
277 | \r | |
e48e37fc | 278 | CopyMem (&ConfigData->NvData.LocalIp, &Dhcp4ModeData.ClientAddress, sizeof (EFI_IPv4_ADDRESS));\r |
279 | CopyMem (&ConfigData->NvData.SubnetMask, &Dhcp4ModeData.SubnetMask, sizeof (EFI_IPv4_ADDRESS));\r | |
280 | CopyMem (&ConfigData->NvData.Gateway, &Dhcp4ModeData.RouterAddress, sizeof (EFI_IPv4_ADDRESS));\r | |
6a690e23 | 281 | \r |
282 | OptionCount = 0;\r | |
283 | OptionList = NULL;\r | |
284 | \r | |
285 | Status = Dhcp4->Parse (Dhcp4, Dhcp4ModeData.ReplyPacket, &OptionCount, OptionList);\r | |
286 | if (Status != EFI_BUFFER_TOO_SMALL) {\r | |
287 | return EFI_DEVICE_ERROR;\r | |
288 | }\r | |
289 | \r | |
e48e37fc | 290 | OptionList = AllocatePool (OptionCount * sizeof (EFI_DHCP4_PACKET_OPTION *));\r |
6a690e23 | 291 | if (OptionList == NULL) {\r |
292 | return EFI_OUT_OF_RESOURCES;\r | |
293 | }\r | |
294 | \r | |
295 | Status = Dhcp4->Parse (Dhcp4, Dhcp4ModeData.ReplyPacket, &OptionCount, OptionList);\r | |
296 | if (EFI_ERROR (Status)) {\r | |
e48e37fc | 297 | gBS->FreePool (OptionList);\r |
6a690e23 | 298 | return EFI_DEVICE_ERROR;\r |
299 | }\r | |
300 | \r | |
301 | for (Index = 0; Index < OptionCount; Index++) {\r | |
302 | //\r | |
303 | // Get DNS server addresses and DHCP server address from this offer.\r | |
304 | //\r | |
305 | if (OptionList[Index]->OpCode == DHCP4_TAG_DNS) {\r | |
306 | \r | |
307 | if (((OptionList[Index]->Length & 0x3) != 0) || (OptionList[Index]->Length == 0)) {\r | |
308 | Status = EFI_INVALID_PARAMETER;\r | |
309 | break;\r | |
310 | }\r | |
311 | //\r | |
312 | // Primary DNS server address.\r | |
313 | //\r | |
e48e37fc | 314 | CopyMem (&ConfigData->PrimaryDns, &OptionList[Index]->Data[0], sizeof (EFI_IPv4_ADDRESS));\r |
6a690e23 | 315 | \r |
316 | if (OptionList[Index]->Length > 4) {\r | |
317 | //\r | |
318 | // Secondary DNS server address\r | |
319 | //\r | |
e48e37fc | 320 | CopyMem (&ConfigData->SecondaryDns, &OptionList[Index]->Data[4], sizeof (EFI_IPv4_ADDRESS));\r |
6a690e23 | 321 | }\r |
322 | } else if (OptionList[Index]->OpCode == DHCP4_TAG_SERVER_ID) {\r | |
323 | if (OptionList[Index]->Length != 4) {\r | |
324 | Status = EFI_INVALID_PARAMETER;\r | |
325 | break;\r | |
326 | }\r | |
327 | \r | |
e48e37fc | 328 | CopyMem (&ConfigData->DhcpServer, &OptionList[Index]->Data[0], sizeof (EFI_IPv4_ADDRESS));\r |
6a690e23 | 329 | }\r |
330 | }\r | |
331 | \r | |
e48e37fc | 332 | gBS->FreePool (OptionList);\r |
6a690e23 | 333 | \r |
334 | return Status;\r | |
335 | }\r | |
336 | \r | |
12618416 | 337 | /**\r |
6a690e23 | 338 | Parse the DHCP ACK to get the address configuration and DNS information.\r |
339 | \r | |
c5de0d55 | 340 | @param[in] Image The handle of the driver image.\r |
341 | @param[in] Controller The handle of the controller;\r | |
342 | @param[in, out] ConfigData The session configuration data.\r | |
6a690e23 | 343 | \r |
12618416 | 344 | @retval EFI_SUCCESS The DNS information is got from the DHCP ACK.\r |
8e29a125 | 345 | @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.\r |
963dbb30 | 346 | @retval Others Other errors as indicated.\r |
12618416 | 347 | **/\r |
348 | EFI_STATUS\r | |
349 | IScsiDoDhcp (\r | |
c5de0d55 | 350 | IN EFI_HANDLE Image,\r |
351 | IN EFI_HANDLE Controller,\r | |
352 | IN OUT ISCSI_SESSION_CONFIG_DATA *ConfigData\r | |
12618416 | 353 | )\r |
6a690e23 | 354 | {\r |
355 | EFI_HANDLE Dhcp4Handle;\r | |
356 | EFI_DHCP4_PROTOCOL *Dhcp4;\r | |
357 | EFI_STATUS Status;\r | |
358 | EFI_DHCP4_PACKET_OPTION *ParaList;\r | |
359 | EFI_DHCP4_CONFIG_DATA Dhcp4ConfigData;\r | |
360 | \r | |
361 | Dhcp4Handle = NULL;\r | |
362 | Dhcp4 = NULL;\r | |
363 | ParaList = NULL;\r | |
364 | \r | |
365 | //\r | |
366 | // Create a DHCP4 child instance and get the protocol.\r | |
367 | //\r | |
368 | Status = NetLibCreateServiceChild (\r | |
369 | Controller,\r | |
370 | Image,\r | |
371 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
372 | &Dhcp4Handle\r | |
373 | );\r | |
374 | if (EFI_ERROR (Status)) {\r | |
375 | return Status;\r | |
376 | }\r | |
377 | \r | |
378 | Status = gBS->OpenProtocol (\r | |
379 | Dhcp4Handle,\r | |
380 | &gEfiDhcp4ProtocolGuid,\r | |
381 | (VOID **)&Dhcp4,\r | |
382 | Image,\r | |
383 | Controller,\r | |
384 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
385 | );\r | |
386 | if (EFI_ERROR (Status)) {\r | |
387 | goto ON_EXIT;\r | |
388 | }\r | |
389 | \r | |
e48e37fc | 390 | ParaList = AllocatePool (sizeof (EFI_DHCP4_PACKET_OPTION) + 3);\r |
6a690e23 | 391 | if (ParaList == NULL) {\r |
392 | Status = EFI_OUT_OF_RESOURCES;\r | |
393 | goto ON_EXIT;\r | |
394 | }\r | |
395 | //\r | |
396 | // Ask the server to reply with Netmask, Router, DNS and RootPath options.\r | |
397 | //\r | |
398 | ParaList->OpCode = DHCP4_TAG_PARA_LIST;\r | |
69b0882d | 399 | ParaList->Length = (UINT8) (ConfigData->NvData.TargetInfoFromDhcp ? 4 : 3);\r |
6a690e23 | 400 | ParaList->Data[0] = DHCP4_TAG_NETMASK;\r |
401 | ParaList->Data[1] = DHCP4_TAG_ROUTER;\r | |
402 | ParaList->Data[2] = DHCP4_TAG_DNS;\r | |
403 | ParaList->Data[3] = DHCP4_TAG_ROOT_PATH;\r | |
404 | \r | |
e48e37fc | 405 | ZeroMem (&Dhcp4ConfigData, sizeof (EFI_DHCP4_CONFIG_DATA));\r |
6a690e23 | 406 | Dhcp4ConfigData.OptionCount = 1;\r |
407 | Dhcp4ConfigData.OptionList = &ParaList;\r | |
408 | \r | |
409 | if (ConfigData->NvData.TargetInfoFromDhcp) {\r | |
410 | //\r | |
411 | // Use callback to select an offer which contains target information.\r | |
412 | //\r | |
413 | Dhcp4ConfigData.Dhcp4Callback = IScsiDhcpSelectOffer;\r | |
414 | Dhcp4ConfigData.CallbackContext = &ConfigData->NvData;\r | |
415 | }\r | |
416 | \r | |
417 | Status = Dhcp4->Configure (Dhcp4, &Dhcp4ConfigData);\r | |
418 | if (EFI_ERROR (Status)) {\r | |
419 | goto ON_EXIT;\r | |
420 | }\r | |
421 | \r | |
422 | Status = Dhcp4->Start (Dhcp4, NULL);\r | |
423 | if (EFI_ERROR (Status)) {\r | |
424 | goto ON_EXIT;\r | |
425 | }\r | |
426 | //\r | |
427 | // Parse the ACK to get required information.\r | |
428 | //\r | |
429 | Status = IScsiParseDhcpAck (Dhcp4, ConfigData);\r | |
430 | \r | |
431 | ON_EXIT:\r | |
432 | \r | |
433 | if (ParaList != NULL) {\r | |
e48e37fc | 434 | gBS->FreePool (ParaList);\r |
6a690e23 | 435 | }\r |
436 | \r | |
437 | if (Dhcp4 != NULL) {\r | |
438 | Dhcp4->Stop (Dhcp4);\r | |
439 | Dhcp4->Configure (Dhcp4, NULL);\r | |
440 | \r | |
441 | gBS->CloseProtocol (\r | |
442 | Dhcp4Handle,\r | |
443 | &gEfiDhcp4ProtocolGuid,\r | |
444 | Image,\r | |
445 | Controller\r | |
446 | );\r | |
447 | }\r | |
448 | \r | |
449 | NetLibDestroyServiceChild (\r | |
450 | Controller,\r | |
451 | Image,\r | |
452 | &gEfiDhcp4ServiceBindingProtocolGuid,\r | |
453 | Dhcp4Handle\r | |
454 | );\r | |
455 | \r | |
456 | return Status;\r | |
457 | }\r |