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a3bcde70 HT |
1 | /** @file\r |
2 | Dhcp6 support functions implementation.\r | |
3 | \r | |
76389e18 | 4 | Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>\r |
a3bcde70 HT |
5 | \r |
6 | This program and the accompanying materials\r | |
7 | are licensed and made available under the terms and conditions of the BSD License\r | |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php.\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #include "Dhcp6Impl.h"\r | |
17 | \r | |
18 | \r | |
19 | /**\r | |
20 | Generate client Duid in the format of Duid-llt.\r | |
21 | \r | |
22 | @param[in] Mode The pointer to the mode of SNP.\r | |
23 | \r | |
24 | @retval NULL If it failed to generate a client Id.\r | |
25 | @retval others The pointer to the new client id.\r | |
26 | \r | |
27 | **/\r | |
28 | EFI_DHCP6_DUID *\r | |
29 | Dhcp6GenerateClientId (\r | |
30 | IN EFI_SIMPLE_NETWORK_MODE *Mode\r | |
31 | )\r | |
32 | {\r | |
33 | EFI_STATUS Status;\r | |
34 | EFI_DHCP6_DUID *Duid;\r | |
35 | EFI_TIME Time;\r | |
36 | UINT32 Stamp;\r | |
33c09637 | 37 | EFI_GUID Uuid;\r |
38 | \r | |
a3bcde70 HT |
39 | \r |
40 | //\r | |
41 | // Attempt to get client Id from variable to keep it constant.\r | |
42 | // See details in section-9 of rfc-3315.\r | |
43 | //\r | |
44 | Duid = GetVariable (L"ClientId", &gEfiDhcp6ServiceBindingProtocolGuid);\r | |
45 | if (Duid != NULL) {\r | |
46 | return Duid;\r | |
47 | }\r | |
48 | \r | |
a3bcde70 HT |
49 | //\r |
50 | // The format of client identifier option:\r | |
51 | //\r | |
52 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1\r | |
53 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
54 | // | OPTION_CLIENTID | option-len |\r | |
55 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
56 | // . .\r | |
57 | // . DUID .\r | |
58 | // . (variable length) .\r | |
59 | // . .\r | |
60 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
61 | //\r | |
a3bcde70 HT |
62 | \r |
63 | //\r | |
33c09637 | 64 | // If System UUID is found from SMBIOS Table, use DUID-UUID type.\r |
65 | //\r | |
66 | if (!EFI_ERROR (NetLibGetSystemGuid (&Uuid))) {\r | |
67 | //\r | |
68 | //\r | |
69 | // The format of DUID-UUID:\r | |
70 | // \r | |
71 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1\r | |
72 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
73 | // | DUID-Type (4) | UUID (128 bits) |\r | |
74 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |\r | |
75 | // | |\r | |
76 | // | |\r | |
77 | // | -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
78 | // | |\r | |
79 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-\r | |
80 | \r | |
81 | //\r | |
82 | // sizeof (option-len + Duid-type + UUID-size) = 20 bytes\r | |
83 | //\r | |
84 | Duid = AllocateZeroPool (2 + 2 + sizeof (EFI_GUID));\r | |
85 | if (Duid == NULL) {\r | |
86 | return NULL;\r | |
87 | }\r | |
88 | \r | |
89 | //\r | |
90 | // sizeof (Duid-type + UUID-size) = 18 bytes\r | |
91 | //\r | |
92 | Duid->Length = (UINT16) (18);\r | |
93 | \r | |
94 | //\r | |
95 | // Set the Duid-type and copy UUID.\r | |
96 | //\r | |
97 | WriteUnaligned16 ((UINT16 *) (Duid->Duid), HTONS (Dhcp6DuidTypeUuid));\r | |
98 | \r | |
99 | CopyMem (Duid->Duid + 2, &Uuid, sizeof(EFI_GUID));\r | |
100 | \r | |
101 | } else {\r | |
102 | \r | |
103 | //\r | |
104 | //\r | |
105 | // The format of DUID-LLT:\r | |
106 | //\r | |
107 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1\r | |
108 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
109 | // | Duid type (1) | hardware type (16 bits) |\r | |
110 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
111 | // | time (32 bits) |\r | |
112 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
113 | // . .\r | |
114 | // . link-layer address (variable length) .\r | |
115 | // . .\r | |
116 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
117 | //\r | |
118 | \r | |
119 | //\r | |
120 | // Generate a time stamp of the seconds from 2000/1/1, assume 30day/month.\r | |
121 | //\r | |
122 | gRT->GetTime (&Time, NULL);\r | |
123 | Stamp = (UINT32)\r | |
124 | (\r | |
125 | (((((Time.Year - 2000) * 360 + (Time.Month - 1)) * 30 + (Time.Day - 1)) * 24 + Time.Hour) * 60 + Time.Minute) *\r | |
126 | 60 +\r | |
127 | Time.Second\r | |
128 | );\r | |
129 | \r | |
130 | //\r | |
131 | // sizeof (option-len + Duid-type + hardware-type + time) = 10 bytes\r | |
132 | //\r | |
133 | Duid = AllocateZeroPool (10 + Mode->HwAddressSize);\r | |
134 | if (Duid == NULL) {\r | |
135 | return NULL;\r | |
136 | }\r | |
137 | \r | |
138 | //\r | |
139 | // sizeof (Duid-type + hardware-type + time) = 8 bytes\r | |
140 | //\r | |
141 | Duid->Length = (UINT16) (Mode->HwAddressSize + 8);\r | |
142 | \r | |
143 | //\r | |
144 | // Set the Duid-type, hardware-type, time and copy the hardware address.\r | |
145 | //\r | |
146 | WriteUnaligned16 ((UINT16 *) (Duid->Duid), HTONS (Dhcp6DuidTypeLlt));\r | |
147 | WriteUnaligned16 ((UINT16 *) (Duid->Duid + 2), HTONS (NET_IFTYPE_ETHERNET));\r | |
148 | WriteUnaligned32 ((UINT32 *) (Duid->Duid + 4), HTONL (Stamp));\r | |
149 | \r | |
150 | CopyMem (Duid->Duid + 8, &Mode->CurrentAddress, Mode->HwAddressSize);\r | |
a3bcde70 HT |
151 | }\r |
152 | \r | |
a3bcde70 HT |
153 | Status = gRT->SetVariable (\r |
154 | L"ClientId",\r | |
155 | &gEfiDhcp6ServiceBindingProtocolGuid,\r | |
156 | (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS),\r | |
157 | Duid->Length + 2,\r | |
158 | (VOID *) Duid\r | |
159 | );\r | |
160 | ASSERT_EFI_ERROR (Status);\r | |
161 | \r | |
162 | return Duid;\r | |
163 | }\r | |
164 | \r | |
165 | \r | |
166 | /**\r | |
167 | Copy the Dhcp6 configure data.\r | |
168 | \r | |
169 | @param[in] DstCfg The pointer to the destination configure data.\r | |
170 | @param[in] SorCfg The pointer to the source configure data.\r | |
171 | \r | |
172 | @retval EFI_SUCCESS Copy the content from SorCfg from DstCfg successfully.\r | |
173 | @retval EFI_OUT_OF_RESOURCES Required system resources could not be allocated.\r | |
174 | \r | |
175 | **/\r | |
176 | EFI_STATUS\r | |
177 | Dhcp6CopyConfigData (\r | |
178 | IN EFI_DHCP6_CONFIG_DATA *DstCfg,\r | |
179 | IN EFI_DHCP6_CONFIG_DATA *SorCfg\r | |
180 | )\r | |
181 | {\r | |
182 | UINTN Index;\r | |
183 | UINTN OptionListSize;\r | |
184 | UINTN OptionSize;\r | |
185 | \r | |
186 | CopyMem (DstCfg, SorCfg, sizeof (EFI_DHCP6_CONFIG_DATA));\r | |
187 | \r | |
188 | //\r | |
189 | // Allocate another buffer for solicitretransmission, and copy it.\r | |
190 | //\r | |
191 | if (SorCfg->SolicitRetransmission != NULL) {\r | |
192 | \r | |
193 | DstCfg->SolicitRetransmission = AllocateZeroPool (sizeof (EFI_DHCP6_RETRANSMISSION));\r | |
194 | \r | |
195 | if (DstCfg->SolicitRetransmission == NULL) {\r | |
196 | //\r | |
197 | // Error will be handled out of this function.\r | |
198 | //\r | |
199 | return EFI_OUT_OF_RESOURCES;\r | |
200 | }\r | |
201 | \r | |
202 | CopyMem (\r | |
203 | DstCfg->SolicitRetransmission,\r | |
204 | SorCfg->SolicitRetransmission,\r | |
205 | sizeof (EFI_DHCP6_RETRANSMISSION)\r | |
206 | );\r | |
207 | }\r | |
208 | \r | |
209 | if (SorCfg->OptionList != NULL && SorCfg->OptionCount != 0) {\r | |
210 | \r | |
211 | OptionListSize = SorCfg->OptionCount * sizeof (EFI_DHCP6_PACKET_OPTION *);\r | |
212 | DstCfg->OptionList = AllocateZeroPool (OptionListSize);\r | |
213 | \r | |
214 | if (DstCfg->OptionList == NULL) {\r | |
215 | //\r | |
216 | // Error will be handled out of this function.\r | |
217 | //\r | |
218 | return EFI_OUT_OF_RESOURCES;\r | |
219 | }\r | |
220 | \r | |
221 | for (Index = 0; Index < SorCfg->OptionCount; Index++) {\r | |
222 | \r | |
223 | OptionSize = NTOHS (SorCfg->OptionList[Index]->OpLen) + 4;\r | |
224 | DstCfg->OptionList[Index] = AllocateZeroPool (OptionSize);\r | |
225 | \r | |
226 | if (DstCfg->OptionList[Index] == NULL) {\r | |
227 | //\r | |
228 | // Error will be handled out of this function.\r | |
229 | //\r | |
230 | return EFI_OUT_OF_RESOURCES;\r | |
231 | }\r | |
232 | \r | |
233 | CopyMem (\r | |
234 | DstCfg->OptionList[Index],\r | |
235 | SorCfg->OptionList[Index],\r | |
236 | OptionSize\r | |
237 | );\r | |
238 | }\r | |
239 | }\r | |
240 | \r | |
241 | return EFI_SUCCESS;\r | |
242 | }\r | |
243 | \r | |
244 | \r | |
245 | /**\r | |
246 | Clean up the configure data.\r | |
247 | \r | |
248 | @param[in, out] CfgData The pointer to the configure data.\r | |
249 | \r | |
250 | **/\r | |
251 | VOID\r | |
252 | Dhcp6CleanupConfigData (\r | |
253 | IN OUT EFI_DHCP6_CONFIG_DATA *CfgData\r | |
254 | )\r | |
255 | {\r | |
256 | UINTN Index;\r | |
257 | \r | |
258 | ASSERT (CfgData != NULL);\r | |
259 | //\r | |
260 | // Clean up all fields in config data including the reference buffers, but do\r | |
261 | // not free the config data buffer itself.\r | |
262 | //\r | |
263 | if (CfgData->OptionList != NULL) {\r | |
264 | for (Index = 0; Index < CfgData->OptionCount; Index++) {\r | |
265 | if (CfgData->OptionList[Index] != NULL) {\r | |
266 | FreePool (CfgData->OptionList[Index]);\r | |
267 | }\r | |
268 | }\r | |
269 | FreePool (CfgData->OptionList);\r | |
270 | }\r | |
271 | \r | |
272 | if (CfgData->SolicitRetransmission != NULL) {\r | |
273 | FreePool (CfgData->SolicitRetransmission);\r | |
274 | }\r | |
275 | \r | |
276 | ZeroMem (CfgData, sizeof (EFI_DHCP6_CONFIG_DATA));\r | |
277 | }\r | |
278 | \r | |
279 | \r | |
280 | /**\r | |
281 | Clean up the mode data.\r | |
282 | \r | |
283 | @param[in, out] ModeData The pointer to the mode data.\r | |
284 | \r | |
285 | **/\r | |
286 | VOID\r | |
287 | Dhcp6CleanupModeData (\r | |
288 | IN OUT EFI_DHCP6_MODE_DATA *ModeData\r | |
289 | )\r | |
290 | {\r | |
291 | ASSERT (ModeData != NULL);\r | |
292 | //\r | |
293 | // Clean up all fields in mode data including the reference buffers, but do\r | |
294 | // not free the mode data buffer itself.\r | |
295 | //\r | |
296 | if (ModeData->ClientId != NULL) {\r | |
297 | FreePool (ModeData->ClientId);\r | |
298 | }\r | |
299 | \r | |
300 | if (ModeData->Ia != NULL) {\r | |
301 | \r | |
302 | if (ModeData->Ia->ReplyPacket != NULL) {\r | |
303 | FreePool (ModeData->Ia->ReplyPacket);\r | |
304 | }\r | |
305 | FreePool (ModeData->Ia);\r | |
306 | }\r | |
307 | \r | |
308 | ZeroMem (ModeData, sizeof (EFI_DHCP6_MODE_DATA));\r | |
309 | }\r | |
310 | \r | |
311 | \r | |
312 | /**\r | |
313 | Calculate the expire time by the algorithm defined in rfc.\r | |
314 | \r | |
315 | @param[in] Base The base value of the time.\r | |
316 | @param[in] IsFirstRt If TRUE, it is the first time to calculate expire time.\r | |
317 | @param[in] NeedSigned If TRUE, the the signed factor is needed.\r | |
318 | \r | |
319 | @return Expire The calculated result for the new expire time.\r | |
320 | \r | |
321 | **/\r | |
322 | UINT32\r | |
323 | Dhcp6CalculateExpireTime (\r | |
324 | IN UINT32 Base,\r | |
325 | IN BOOLEAN IsFirstRt,\r | |
326 | IN BOOLEAN NeedSigned\r | |
327 | )\r | |
328 | {\r | |
329 | EFI_TIME Time;\r | |
330 | BOOLEAN Signed;\r | |
331 | UINT32 Seed;\r | |
332 | UINT32 Expire;\r | |
333 | \r | |
334 | //\r | |
335 | // Take the 10bits of microsecond in system time as a uniform distribution.\r | |
336 | // Take the 10th bit as a flag to determine it's signed or not.\r | |
337 | //\r | |
338 | gRT->GetTime (&Time, NULL);\r | |
339 | Seed = ((Time.Nanosecond >> 10) & DHCP6_10_BIT_MASK);\r | |
340 | Signed = (BOOLEAN) ((((Time.Nanosecond >> 9) & 0x01) != 0) ? TRUE : FALSE);\r | |
341 | Signed = (BOOLEAN) (NeedSigned ? Signed : FALSE);\r | |
342 | \r | |
343 | //\r | |
344 | // Calculate expire by the following algo:\r | |
345 | // 1. base + base * (-0.1 ~ 0) for the first solicit\r | |
346 | // 2. base + base * (-0.1 ~ 0.1) for the first other messages\r | |
347 | // 3. 2 * base + base * (-0.1 ~ 0.1) for the subsequent all messages\r | |
348 | // 4. base + base * (-0.1 ~ 0) for the more than mrt timeout\r | |
349 | //\r | |
350 | // The (Seed / 0x3ff / 10) is used to a random range (0, 0.1).\r | |
351 | //\r | |
352 | if (IsFirstRt && Signed) {\r | |
353 | \r | |
354 | Expire = Base - (UINT32) (Base * Seed / DHCP6_10_BIT_MASK / 10);\r | |
355 | \r | |
356 | } else if (IsFirstRt && !Signed) {\r | |
357 | \r | |
358 | Expire = Base + (UINT32) (Base * Seed / DHCP6_10_BIT_MASK / 10);\r | |
359 | \r | |
360 | } else if (!IsFirstRt && Signed) {\r | |
361 | \r | |
362 | Expire = 2 * Base - (UINT32) (Base * Seed / DHCP6_10_BIT_MASK / 10);\r | |
363 | \r | |
364 | } else {\r | |
365 | \r | |
366 | Expire = 2 * Base + (UINT32) (Base * Seed / DHCP6_10_BIT_MASK / 10);\r | |
367 | }\r | |
368 | \r | |
369 | Expire = (Expire != 0) ? Expire : 1;\r | |
370 | \r | |
371 | return Expire;\r | |
372 | }\r | |
373 | \r | |
374 | \r | |
375 | /**\r | |
376 | Calculate the lease time by the algorithm defined in rfc.\r | |
377 | \r | |
378 | @param[in] IaCb The pointer to the Ia control block.\r | |
379 | \r | |
380 | **/\r | |
381 | VOID\r | |
382 | Dhcp6CalculateLeaseTime (\r | |
383 | IN DHCP6_IA_CB *IaCb\r | |
384 | )\r | |
385 | {\r | |
386 | EFI_DHCP6_IA_ADDRESS *IaAddr;\r | |
387 | UINT32 MinLt;\r | |
388 | UINT32 MaxLt;\r | |
389 | UINTN Index;\r | |
390 | \r | |
391 | ASSERT (IaCb->Ia->IaAddressCount > 0);\r | |
392 | \r | |
393 | MinLt = (UINT32) (-1);\r | |
394 | MaxLt = 0;\r | |
395 | \r | |
396 | //\r | |
397 | // Calculate minlt as min of all valid life time, and maxlt as max of all\r | |
398 | // valid life time.\r | |
399 | //\r | |
400 | for (Index = 0; Index < IaCb->Ia->IaAddressCount; Index++) {\r | |
401 | IaAddr = IaCb->Ia->IaAddress + Index * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
402 | MinLt = MIN (MinLt, IaAddr->ValidLifetime);\r | |
403 | MaxLt = MAX (MinLt, IaAddr->ValidLifetime);\r | |
404 | }\r | |
405 | \r | |
406 | //\r | |
407 | // Take 50% minlt as t1, and 80% maxlt as t2 if Dhcp6 server doesn't offer\r | |
408 | // such information.\r | |
409 | //\r | |
410 | IaCb->T1 = (IaCb->T1 != 0) ? IaCb->T1 : (UINT32)(MinLt * 5 / 10);\r | |
411 | IaCb->T2 = (IaCb->T2 != 0) ? IaCb->T2 : (UINT32)(MinLt * 8 / 10);\r | |
412 | IaCb->AllExpireTime = MaxLt;\r | |
413 | IaCb->LeaseTime = 0;\r | |
414 | }\r | |
415 | \r | |
416 | \r | |
417 | /**\r | |
418 | Check whether the addresses are all included by the configured Ia.\r | |
419 | \r | |
420 | @param[in] Ia The pointer to the Ia.\r | |
421 | @param[in] AddressCount The number of addresses.\r | |
422 | @param[in] Addresses The pointer to the addresses buffer.\r | |
423 | \r | |
424 | @retval EFI_SUCCESS The addresses are all included by the configured IA.\r | |
425 | @retval EFI_NOT_FOUND The addresses are not included by the configured IA.\r | |
426 | \r | |
427 | **/\r | |
428 | EFI_STATUS\r | |
429 | Dhcp6CheckAddress (\r | |
430 | IN EFI_DHCP6_IA *Ia,\r | |
431 | IN UINT32 AddressCount,\r | |
432 | IN EFI_IPv6_ADDRESS *Addresses\r | |
433 | )\r | |
434 | {\r | |
435 | UINTN Index1;\r | |
436 | UINTN Index2;\r | |
437 | BOOLEAN Found;\r | |
438 | \r | |
439 | //\r | |
440 | // Check whether the addresses are all included by the configured IA. And it\r | |
441 | // will return success if address count is zero, which means all addresses.\r | |
442 | //\r | |
443 | for (Index1 = 0; Index1 < AddressCount; Index1++) {\r | |
444 | \r | |
445 | Found = FALSE;\r | |
446 | \r | |
447 | for (Index2 = 0; Index2 < Ia->IaAddressCount; Index2++) {\r | |
448 | \r | |
449 | if (CompareMem (\r | |
450 | &Addresses[Index1],\r | |
451 | &Ia->IaAddress[Index2],\r | |
452 | sizeof (EFI_IPv6_ADDRESS)\r | |
453 | ) == 0) {\r | |
454 | \r | |
455 | Found = TRUE;\r | |
456 | break;\r | |
457 | }\r | |
458 | }\r | |
459 | \r | |
460 | if (!Found) {\r | |
461 | return EFI_NOT_FOUND;\r | |
462 | }\r | |
463 | }\r | |
464 | \r | |
465 | return EFI_SUCCESS;\r | |
466 | }\r | |
467 | \r | |
468 | \r | |
469 | /**\r | |
470 | Deprive the addresses from current Ia, and generate another eliminated Ia.\r | |
471 | \r | |
472 | @param[in] Ia The pointer to the Ia.\r | |
473 | @param[in] AddressCount The number of addresses.\r | |
474 | @param[in] Addresses The pointer to the addresses buffer.\r | |
475 | \r | |
476 | @retval NULL If it failed to generate the deprived Ia.\r | |
477 | @retval others The pointer to the deprived Ia.\r | |
478 | \r | |
479 | **/\r | |
480 | EFI_DHCP6_IA *\r | |
481 | Dhcp6DepriveAddress (\r | |
482 | IN EFI_DHCP6_IA *Ia,\r | |
483 | IN UINT32 AddressCount,\r | |
484 | IN EFI_IPv6_ADDRESS *Addresses\r | |
485 | )\r | |
486 | {\r | |
487 | EFI_DHCP6_IA *IaCopy;\r | |
488 | UINTN IaCopySize;\r | |
489 | UINTN Index1;\r | |
490 | UINTN Index2;\r | |
491 | BOOLEAN Found;\r | |
492 | \r | |
493 | if (AddressCount == 0) {\r | |
494 | //\r | |
495 | // It means release all Ia addresses if address count is zero.\r | |
496 | //\r | |
497 | AddressCount = Ia->IaAddressCount;\r | |
498 | }\r | |
499 | \r | |
500 | ASSERT (AddressCount != 0);\r | |
501 | \r | |
502 | IaCopySize = sizeof (EFI_DHCP6_IA) + (AddressCount - 1) * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
503 | IaCopy = AllocateZeroPool (IaCopySize);\r | |
504 | \r | |
505 | if (IaCopy == NULL) {\r | |
506 | return NULL;\r | |
507 | }\r | |
508 | \r | |
509 | if (AddressCount == Ia->IaAddressCount) {\r | |
510 | //\r | |
511 | // If release all Ia addresses, just copy the configured Ia and then set\r | |
512 | // its address count as zero.\r | |
513 | // We may decline/release part of addresses at the begining. So it's a\r | |
514 | // forwarding step to update address infor for decline/release, while the\r | |
515 | // other infor such as Ia state will be updated when receiving reply.\r | |
516 | //\r | |
517 | CopyMem (IaCopy, Ia, IaCopySize);\r | |
518 | Ia->IaAddressCount = 0;\r | |
519 | return IaCopy;\r | |
520 | }\r | |
521 | \r | |
522 | CopyMem (IaCopy, Ia, sizeof (EFI_DHCP6_IA));\r | |
523 | \r | |
524 | //\r | |
525 | // Move the addresses from the Ia of instance to the deprived Ia.\r | |
526 | //\r | |
527 | for (Index1 = 0; Index1 < AddressCount; Index1++) {\r | |
528 | \r | |
529 | Found = FALSE;\r | |
530 | \r | |
531 | for (Index2 = 0; Index2 < Ia->IaAddressCount; Index2++) {\r | |
532 | \r | |
533 | if (CompareMem (\r | |
534 | &Addresses[Index1],\r | |
535 | &Ia->IaAddress[Index2],\r | |
536 | sizeof (EFI_IPv6_ADDRESS)\r | |
537 | ) == 0) {\r | |
538 | //\r | |
539 | // Copy the deprived address to the copy of Ia\r | |
540 | //\r | |
541 | CopyMem (\r | |
542 | &IaCopy->IaAddress[Index1],\r | |
543 | &Ia->IaAddress[Index2],\r | |
544 | sizeof (EFI_DHCP6_IA_ADDRESS)\r | |
545 | );\r | |
546 | //\r | |
547 | // Delete the deprived address from the instance Ia\r | |
548 | //\r | |
549 | if (Index2 + 1 < Ia->IaAddressCount) {\r | |
550 | CopyMem (\r | |
551 | &Ia->IaAddress[Index2],\r | |
552 | &Ia->IaAddress[Index2 + 1],\r | |
553 | (Ia->IaAddressCount - Index2 - 1) * sizeof (EFI_DHCP6_IA_ADDRESS)\r | |
554 | );\r | |
555 | }\r | |
556 | Found = TRUE;\r | |
557 | break;\r | |
558 | }\r | |
559 | }\r | |
560 | ASSERT (Found == TRUE);\r | |
561 | }\r | |
562 | \r | |
563 | Ia->IaAddressCount -= AddressCount;\r | |
564 | IaCopy->IaAddressCount = AddressCount;\r | |
565 | \r | |
566 | return IaCopy;\r | |
567 | }\r | |
568 | \r | |
569 | \r | |
570 | /**\r | |
571 | The dummy ext buffer free callback routine.\r | |
572 | \r | |
573 | @param[in] Arg The pointer to the parameter.\r | |
574 | \r | |
575 | **/\r | |
576 | VOID\r | |
577 | EFIAPI\r | |
578 | Dhcp6DummyExtFree (\r | |
579 | IN VOID *Arg\r | |
580 | )\r | |
581 | {\r | |
582 | }\r | |
583 | \r | |
584 | \r | |
585 | /**\r | |
586 | The callback routine once message transmitted.\r | |
587 | \r | |
76389e18 | 588 | @param[in] Wrap The pointer to the received net buffer.\r |
a3bcde70 HT |
589 | @param[in] EndPoint The pointer to the udp end point.\r |
590 | @param[in] IoStatus The return status from udp io.\r | |
591 | @param[in] Context The opaque parameter to the function.\r | |
592 | \r | |
593 | **/\r | |
594 | VOID\r | |
595 | EFIAPI\r | |
596 | Dhcp6OnTransmitted (\r | |
597 | IN NET_BUF *Wrap,\r | |
598 | IN UDP_END_POINT *EndPoint,\r | |
599 | IN EFI_STATUS IoStatus,\r | |
600 | IN VOID *Context\r | |
601 | )\r | |
602 | {\r | |
603 | NetbufFree (Wrap);\r | |
604 | }\r | |
605 | \r | |
606 | \r | |
607 | /**\r | |
608 | Append the option to Buf, and move Buf to the end.\r | |
609 | \r | |
610 | @param[in, out] Buf The pointer to the buffer.\r | |
611 | @param[in] OptType The option type.\r | |
612 | @param[in] OptLen The length of option contents.\r | |
613 | @param[in] Data The pointer to the option content.\r | |
614 | \r | |
615 | @return Buf The position to append the next option.\r | |
616 | \r | |
617 | **/\r | |
618 | UINT8 *\r | |
619 | Dhcp6AppendOption (\r | |
620 | IN OUT UINT8 *Buf,\r | |
621 | IN UINT16 OptType,\r | |
622 | IN UINT16 OptLen,\r | |
623 | IN UINT8 *Data\r | |
624 | )\r | |
625 | {\r | |
626 | //\r | |
627 | // The format of Dhcp6 option:\r | |
628 | //\r | |
629 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1\r | |
630 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
631 | // | option-code | option-len (option data) |\r | |
632 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
633 | // | option-data |\r | |
634 | // | (option-len octets) |\r | |
635 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
636 | //\r | |
637 | \r | |
638 | ASSERT (OptLen != 0);\r | |
639 | \r | |
640 | WriteUnaligned16 ((UINT16 *) Buf, OptType);\r | |
641 | Buf += 2;\r | |
642 | WriteUnaligned16 ((UINT16 *) Buf, OptLen);\r | |
643 | Buf += 2;\r | |
644 | CopyMem (Buf, Data, NTOHS (OptLen));\r | |
645 | Buf += NTOHS (OptLen);\r | |
646 | \r | |
647 | return Buf;\r | |
648 | }\r | |
649 | \r | |
650 | \r | |
651 | /**\r | |
652 | Append the appointed Ia option to Buf, and move Buf to the end.\r | |
653 | \r | |
654 | @param[in, out] Buf The pointer to the position to append.\r | |
655 | @param[in] Ia The pointer to the Ia.\r | |
656 | @param[in] T1 The time of T1.\r | |
657 | @param[in] T2 The time of T2.\r | |
658 | \r | |
659 | @return Buf The position to append the next Ia option.\r | |
660 | \r | |
661 | **/\r | |
662 | UINT8 *\r | |
663 | Dhcp6AppendIaOption (\r | |
664 | IN OUT UINT8 *Buf,\r | |
665 | IN EFI_DHCP6_IA *Ia,\r | |
666 | IN UINT32 T1,\r | |
667 | IN UINT32 T2\r | |
668 | )\r | |
669 | {\r | |
670 | UINT8 *AddrOpt;\r | |
671 | UINT16 *Len;\r | |
672 | UINTN Index;\r | |
673 | UINT16 Length;\r | |
674 | \r | |
675 | //\r | |
676 | // The format of IA_NA and IA_TA option:\r | |
677 | //\r | |
678 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1\r | |
679 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
680 | // | OPTION_IA_NA | option-len |\r | |
681 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
682 | // | IAID (4 octets) |\r | |
683 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
684 | // | T1 (only for IA_NA) |\r | |
685 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
686 | // | T2 (only for IA_NA) |\r | |
687 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
688 | // | |\r | |
689 | // . IA_NA-options/IA_TA-options .\r | |
690 | // . .\r | |
691 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
692 | //\r | |
693 | \r | |
694 | //\r | |
695 | // Fill the value of Ia option type\r | |
696 | //\r | |
697 | WriteUnaligned16 ((UINT16 *) Buf, HTONS (Ia->Descriptor.Type));\r | |
698 | Buf += 2;\r | |
699 | \r | |
700 | //\r | |
701 | // Fill the len of Ia option later, keep the pointer first\r | |
702 | //\r | |
703 | Len = (UINT16 *) Buf;\r | |
704 | Buf += 2;\r | |
705 | \r | |
706 | //\r | |
707 | // Fill the value of iaid\r | |
708 | //\r | |
709 | WriteUnaligned32 ((UINT32 *) Buf, HTONL (Ia->Descriptor.IaId));\r | |
710 | Buf += 4;\r | |
711 | \r | |
712 | //\r | |
713 | // Fill the value of t1 and t2 if iana, keep it 0xffffffff if no specified.\r | |
714 | //\r | |
715 | if (Ia->Descriptor.Type == Dhcp6OptIana) {\r | |
716 | WriteUnaligned32 ((UINT32 *) Buf, ((T1 != 0) ? T1 : 0xffffffff));\r | |
717 | Buf += 4;\r | |
718 | WriteUnaligned32 ((UINT32 *) Buf, ((T2 != 0) ? T2 : 0xffffffff));\r | |
719 | Buf += 4;\r | |
720 | }\r | |
721 | \r | |
722 | //\r | |
723 | // Fill all the addresses belong to the Ia\r | |
724 | //\r | |
725 | for (Index = 0; Index < Ia->IaAddressCount; Index++) {\r | |
726 | \r | |
727 | AddrOpt = (UINT8 *) Ia->IaAddress + Index * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
728 | Length = HTONS ((UINT16) sizeof (EFI_DHCP6_IA_ADDRESS));\r | |
729 | Buf = Dhcp6AppendOption (\r | |
730 | Buf,\r | |
731 | HTONS (Dhcp6OptIaAddr),\r | |
732 | Length,\r | |
733 | AddrOpt\r | |
734 | );\r | |
735 | }\r | |
736 | \r | |
737 | //\r | |
738 | // Fill the value of Ia option length\r | |
739 | //\r | |
740 | *Len = HTONS ((UINT16) (Buf - (UINT8 *) Len - 2));\r | |
741 | \r | |
742 | return Buf;\r | |
743 | }\r | |
744 | \r | |
745 | /**\r | |
746 | Append the appointed Elapsed time option to Buf, and move Buf to the end.\r | |
747 | \r | |
748 | @param[in, out] Buf The pointer to the position to append.\r | |
749 | @param[in] Instance The pointer to the Dhcp6 instance.\r | |
750 | @param[out] Elapsed The pointer to the elapsed time value in\r | |
751 | the generated packet.\r | |
752 | \r | |
753 | @return Buf The position to append the next Ia option.\r | |
754 | \r | |
755 | **/\r | |
756 | UINT8 *\r | |
757 | Dhcp6AppendETOption (\r | |
758 | IN OUT UINT8 *Buf,\r | |
759 | IN DHCP6_INSTANCE *Instance,\r | |
760 | OUT UINT16 **Elapsed\r | |
761 | )\r | |
762 | {\r | |
763 | //\r | |
764 | // The format of elapsed time option:\r | |
765 | //\r | |
766 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1\r | |
767 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
768 | // | OPTION_ELAPSED_TIME | option-len |\r | |
769 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
770 | // | elapsed-time |\r | |
771 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
772 | //\r | |
773 | \r | |
774 | //\r | |
775 | // Fill the value of elapsed-time option type.\r | |
776 | //\r | |
777 | WriteUnaligned16 ((UINT16 *) Buf, HTONS (Dhcp6OptElapsedTime));\r | |
778 | Buf += 2;\r | |
779 | \r | |
780 | //\r | |
781 | // Fill the len of elapsed-time option, which is fixed.\r | |
782 | //\r | |
783 | WriteUnaligned16 ((UINT16 *) Buf, HTONS(2));\r | |
784 | Buf += 2;\r | |
785 | \r | |
786 | //\r | |
787 | // Fill in elapsed time value with 0 value for now. The actual value is\r | |
788 | // filled in later just before the packet is transmitted.\r | |
789 | //\r | |
790 | WriteUnaligned16 ((UINT16 *) Buf, HTONS(0));\r | |
791 | *Elapsed = (UINT16 *) Buf;\r | |
792 | Buf += 2;\r | |
793 | \r | |
794 | return Buf;\r | |
795 | }\r | |
796 | \r | |
797 | /**\r | |
798 | Set the elapsed time based on the given instance and the pointer to the\r | |
799 | elapsed time option.\r | |
800 | \r | |
801 | @param[in] Elapsed The pointer to the position to append.\r | |
802 | @param[in] Instance The pointer to the Dhcp6 instance.\r | |
803 | \r | |
804 | **/\r | |
805 | VOID\r | |
806 | SetElapsedTime (\r | |
807 | IN UINT16 *Elapsed,\r | |
808 | IN DHCP6_INSTANCE *Instance\r | |
809 | )\r | |
810 | {\r | |
811 | EFI_TIME Time;\r | |
812 | UINT64 CurrentStamp;\r | |
813 | UINT64 ElapsedTimeValue;\r | |
814 | \r | |
815 | //\r | |
816 | // Generate a time stamp of the centiseconds from 2000/1/1, assume 30day/month.\r | |
817 | //\r | |
818 | gRT->GetTime (&Time, NULL);\r | |
819 | CurrentStamp = (UINT64)\r | |
820 | (\r | |
821 | ((((((Time.Year - 2000) * 360 +\r | |
822 | (Time.Month - 1)) * 30 +\r | |
823 | (Time.Day - 1)) * 24 + Time.Hour) * 60 +\r | |
824 | Time.Minute) * 60 + Time.Second) * 100\r | |
825 | + DivU64x32(Time.Nanosecond, 10000000)\r | |
826 | );\r | |
827 | \r | |
828 | //\r | |
829 | // Sentinel value of 0 means that this is the first DHCP packet that we are\r | |
830 | // sending and that we need to initialize the value. First DHCP Solicit\r | |
831 | // gets 0 elapsed-time. Otherwise, calculate based on StartTime.\r | |
832 | //\r | |
833 | if (Instance->StartTime == 0) {\r | |
834 | ElapsedTimeValue = 0;\r | |
835 | Instance->StartTime = CurrentStamp;\r | |
836 | } else {\r | |
837 | ElapsedTimeValue = CurrentStamp - Instance->StartTime;\r | |
838 | \r | |
839 | //\r | |
840 | // If elapsed time cannot fit in two bytes, set it to 0xffff.\r | |
841 | //\r | |
842 | if (ElapsedTimeValue > 0xffff) {\r | |
843 | ElapsedTimeValue = 0xffff;\r | |
844 | }\r | |
845 | }\r | |
846 | WriteUnaligned16 (Elapsed, HTONS((UINT16) ElapsedTimeValue));\r | |
847 | }\r | |
848 | \r | |
849 | \r | |
850 | /**\r | |
851 | Seek the address of the first byte of the option header.\r | |
852 | \r | |
853 | @param[in] Buf The pointer to the buffer.\r | |
854 | @param[in] SeekLen The length to seek.\r | |
855 | @param[in] OptType The option type.\r | |
856 | \r | |
857 | @retval NULL If it failed to seek the option.\r | |
858 | @retval others The position to the option.\r | |
859 | \r | |
860 | **/\r | |
861 | UINT8 *\r | |
862 | Dhcp6SeekOption (\r | |
863 | IN UINT8 *Buf,\r | |
864 | IN UINT32 SeekLen,\r | |
865 | IN UINT16 OptType\r | |
866 | )\r | |
867 | {\r | |
868 | UINT8 *Cursor;\r | |
869 | UINT8 *Option;\r | |
870 | UINT16 DataLen;\r | |
871 | UINT16 OpCode;\r | |
872 | \r | |
873 | Option = NULL;\r | |
874 | Cursor = Buf;\r | |
875 | \r | |
876 | //\r | |
877 | // The format of Dhcp6 option refers to Dhcp6AppendOption().\r | |
878 | //\r | |
879 | while (Cursor < Buf + SeekLen) {\r | |
880 | OpCode = ReadUnaligned16 ((UINT16 *) Cursor);\r | |
881 | if (OpCode == HTONS (OptType)) {\r | |
882 | Option = Cursor;\r | |
883 | break;\r | |
884 | }\r | |
885 | DataLen = NTOHS (ReadUnaligned16 ((UINT16 *) (Cursor + 2)));\r | |
886 | Cursor += (DataLen + 4);\r | |
887 | }\r | |
888 | \r | |
889 | return Option;\r | |
890 | }\r | |
891 | \r | |
892 | \r | |
893 | /**\r | |
894 | Seek the address of the first byte of the Ia option header.\r | |
895 | \r | |
896 | @param[in] Buf The pointer to the buffer.\r | |
897 | @param[in] SeekLen The length to seek.\r | |
898 | @param[in] IaDesc The pointer to the Ia descriptor.\r | |
899 | \r | |
900 | @retval NULL If it failed to seek the Ia option.\r | |
901 | @retval others The position to the Ia option.\r | |
902 | \r | |
903 | **/\r | |
904 | UINT8 *\r | |
905 | Dhcp6SeekIaOption (\r | |
906 | IN UINT8 *Buf,\r | |
907 | IN UINT32 SeekLen,\r | |
908 | IN EFI_DHCP6_IA_DESCRIPTOR *IaDesc\r | |
909 | )\r | |
910 | {\r | |
911 | UINT8 *Cursor;\r | |
912 | UINT8 *Option;\r | |
913 | UINT16 DataLen;\r | |
914 | UINT16 OpCode;\r | |
915 | UINT32 IaId;\r | |
916 | \r | |
917 | //\r | |
918 | // The format of IA_NA and IA_TA option refers to Dhcp6AppendIaOption().\r | |
919 | //\r | |
920 | Option = NULL;\r | |
921 | Cursor = Buf;\r | |
922 | \r | |
923 | while (Cursor < Buf + SeekLen) {\r | |
924 | OpCode = ReadUnaligned16 ((UINT16 *) Cursor);\r | |
925 | IaId = ReadUnaligned32 ((UINT32 *) (Cursor + 4));\r | |
926 | if (OpCode == HTONS (IaDesc->Type) && IaId == HTONL (IaDesc->IaId)) {\r | |
927 | Option = Cursor;\r | |
928 | break;\r | |
929 | }\r | |
930 | DataLen = NTOHS (ReadUnaligned16 ((UINT16 *) (Cursor + 2)));\r | |
931 | Cursor += (DataLen + 4);\r | |
932 | }\r | |
933 | \r | |
934 | return Option;\r | |
935 | }\r | |
936 | \r | |
937 | \r | |
938 | /**\r | |
939 | Parse the address option and update the address infomation.\r | |
940 | \r | |
941 | @param[in] IaInnerOpt The pointer to the buffer.\r | |
942 | @param[in] IaInnerLen The length to parse.\r | |
943 | @param[out] AddrNum The number of addresses.\r | |
944 | @param[in, out] AddrBuf The pointer to the address buffer.\r | |
945 | \r | |
946 | **/\r | |
947 | VOID\r | |
948 | Dhcp6ParseAddrOption (\r | |
949 | IN UINT8 *IaInnerOpt,\r | |
950 | IN UINT16 IaInnerLen,\r | |
951 | OUT UINT32 *AddrNum,\r | |
952 | IN OUT EFI_DHCP6_IA_ADDRESS *AddrBuf\r | |
953 | )\r | |
954 | {\r | |
955 | UINT8 *Cursor;\r | |
956 | UINT16 DataLen;\r | |
957 | UINT16 OpCode;\r | |
958 | UINT32 ValidLt;\r | |
959 | \r | |
960 | //\r | |
961 | // The format of the IA Address option:\r | |
962 | //\r | |
963 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1\r | |
964 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
965 | // | OPTION_IAADDR | option-len |\r | |
966 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
967 | // | |\r | |
968 | // | IPv6 address |\r | |
969 | // | |\r | |
970 | // | |\r | |
971 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
972 | // | preferred-lifetime |\r | |
973 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
974 | // | valid-lifetime |\r | |
975 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
976 | // . .\r | |
977 | // . IAaddr-options .\r | |
978 | // . .\r | |
979 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
980 | //\r | |
981 | \r | |
982 | //\r | |
983 | // Two usage model:\r | |
984 | //\r | |
985 | // 1. Pass addrbuf == null, to get the addrnum over the Ia inner options.\r | |
986 | // 2. Pass addrbuf != null, to resolve the addresses over the Ia inner\r | |
987 | // options to the addrbuf.\r | |
988 | //\r | |
989 | \r | |
990 | Cursor = IaInnerOpt;\r | |
991 | *AddrNum = 0;\r | |
992 | \r | |
993 | while (Cursor < IaInnerOpt + IaInnerLen) {\r | |
994 | //\r | |
995 | // Count the Ia address option with non-0 valid time.\r | |
996 | //\r | |
997 | OpCode = ReadUnaligned16 ((UINT16 *) Cursor);\r | |
998 | ValidLt = ReadUnaligned32 ((UINT32 *) (Cursor + 24));\r | |
999 | if (OpCode == HTONS (Dhcp6OptIaAddr) && ValidLt != 0) {\r | |
1000 | \r | |
1001 | if (AddrBuf != NULL) {\r | |
1002 | CopyMem (AddrBuf, Cursor + 4, sizeof (EFI_DHCP6_IA_ADDRESS));\r | |
1003 | AddrBuf->PreferredLifetime = NTOHL (AddrBuf->PreferredLifetime);\r | |
1004 | AddrBuf->ValidLifetime = NTOHL (AddrBuf->ValidLifetime);\r | |
1005 | AddrBuf = (EFI_DHCP6_IA_ADDRESS *) ((UINT8 *) AddrBuf + sizeof (EFI_DHCP6_IA_ADDRESS));\r | |
1006 | }\r | |
1007 | \r | |
1008 | (*AddrNum)++;\r | |
1009 | }\r | |
1010 | DataLen = NTOHS (ReadUnaligned16 ((UINT16 *) (Cursor + 2)));\r | |
1011 | Cursor += (DataLen + 4);\r | |
1012 | }\r | |
1013 | }\r | |
1014 | \r | |
1015 | \r | |
1016 | /**\r | |
1017 | Create a control blcok for the Ia according to the corresponding options.\r | |
1018 | \r | |
1019 | @param[in] Instance The pointer to DHCP6 Instance.\r | |
1020 | @param[in] IaInnerOpt The pointer to the inner options in the Ia option.\r | |
1021 | @param[in] IaInnerLen The length of all the inner options in the Ia option.\r | |
1022 | @param[in] T1 T1 time in the Ia option.\r | |
1023 | @param[in] T2 T2 time in the Ia option.\r | |
1024 | \r | |
1025 | @retval EFI_NOT_FOUND No valid IA option is found.\r | |
1026 | @retval EFI_SUCCESS Create an IA control block successfully.\r | |
1027 | @retval EFI_OUT_OF_RESOURCES Required system resources could not be allocated.\r | |
1028 | \r | |
1029 | **/\r | |
1030 | EFI_STATUS\r | |
1031 | Dhcp6GenerateIaCb (\r | |
1032 | IN DHCP6_INSTANCE *Instance,\r | |
1033 | IN UINT8 *IaInnerOpt,\r | |
1034 | IN UINT16 IaInnerLen,\r | |
1035 | IN UINT32 T1,\r | |
1036 | IN UINT32 T2\r | |
1037 | )\r | |
1038 | {\r | |
1039 | UINT32 AddrNum;\r | |
1040 | UINT32 IaSize;\r | |
1041 | EFI_DHCP6_IA *Ia;\r | |
1042 | \r | |
1043 | if (Instance->IaCb.Ia == NULL) {\r | |
1044 | return EFI_NOT_FOUND;\r | |
1045 | }\r | |
1046 | \r | |
1047 | //\r | |
1048 | // Calculate the number of addresses for this Ia, excluding the addresses with\r | |
1049 | // the value 0 of valid lifetime.\r | |
1050 | //\r | |
1051 | Dhcp6ParseAddrOption (IaInnerOpt, IaInnerLen, &AddrNum, NULL);\r | |
1052 | \r | |
1053 | if (AddrNum == 0) {\r | |
1054 | return EFI_NOT_FOUND;\r | |
1055 | }\r | |
1056 | \r | |
1057 | //\r | |
1058 | // Allocate for new IA.\r | |
1059 | //\r | |
1060 | IaSize = sizeof (EFI_DHCP6_IA) + (AddrNum - 1) * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
1061 | Ia = AllocateZeroPool (IaSize);\r | |
1062 | \r | |
1063 | if (Ia == NULL) {\r | |
1064 | return EFI_OUT_OF_RESOURCES;\r | |
1065 | }\r | |
1066 | \r | |
1067 | //\r | |
1068 | // Fill up this new IA fields.\r | |
1069 | //\r | |
1070 | Ia->State = Instance->IaCb.Ia->State;\r | |
1071 | Ia->IaAddressCount = AddrNum;\r | |
1072 | CopyMem (&Ia->Descriptor, &Instance->Config->IaDescriptor, sizeof (EFI_DHCP6_IA_DESCRIPTOR));\r | |
1073 | Dhcp6ParseAddrOption (IaInnerOpt, IaInnerLen, &AddrNum, Ia->IaAddress);\r | |
1074 | \r | |
1075 | //\r | |
1076 | // Free original IA resource.\r | |
1077 | //\r | |
1078 | if (Instance->IaCb.Ia->ReplyPacket != NULL) {\r | |
1079 | FreePool (Instance->IaCb.Ia->ReplyPacket);\r | |
1080 | }\r | |
1081 | FreePool (Instance->IaCb.Ia);\r | |
1082 | \r | |
1083 | \r | |
1084 | ZeroMem (&Instance->IaCb, sizeof (DHCP6_IA_CB));\r | |
1085 | \r | |
1086 | //\r | |
1087 | // Update IaCb to use new IA.\r | |
1088 | //\r | |
1089 | Instance->IaCb.Ia = Ia;\r | |
1090 | \r | |
1091 | //\r | |
1092 | \r | |
1093 | // Fill in IaCb fields. Such as T1, T2, AllExpireTime and LeaseTime.\r | |
1094 | //\r | |
1095 | Instance->IaCb.T1 = T1;\r | |
1096 | Instance->IaCb.T2 = T2;\r | |
1097 | Dhcp6CalculateLeaseTime (&Instance->IaCb);\r | |
1098 | \r | |
1099 | return EFI_SUCCESS;\r | |
1100 | }\r | |
1101 | \r | |
1102 | \r | |
1103 | /**\r | |
1104 | Cache the current IA configuration information.\r | |
1105 | \r | |
1106 | @param[in] Instance The pointer to DHCP6 Instance.\r | |
1107 | \r | |
1108 | @retval EFI_SUCCESS Cache the current IA successfully.\r | |
1109 | @retval EFI_OUT_OF_RESOURCES Required system resources could not be allocated.\r | |
1110 | \r | |
1111 | **/\r | |
1112 | EFI_STATUS\r | |
1113 | Dhcp6CacheIa (\r | |
1114 | IN DHCP6_INSTANCE *Instance\r | |
1115 | )\r | |
1116 | {\r | |
1117 | UINTN IaSize;\r | |
1118 | EFI_DHCP6_IA *Ia;\r | |
1119 | \r | |
1120 | Ia = Instance->IaCb.Ia;\r | |
1121 | \r | |
1122 | if ((Instance->CacheIa == NULL) && (Ia != NULL)) {\r | |
1123 | //\r | |
1124 | // Cache the current IA.\r | |
1125 | //\r | |
1126 | IaSize = sizeof (EFI_DHCP6_IA) + (Ia->IaAddressCount - 1) * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
1127 | \r | |
1128 | Instance->CacheIa = AllocateZeroPool (IaSize);\r | |
1129 | if (Instance->CacheIa == NULL) {\r | |
1130 | return EFI_OUT_OF_RESOURCES;\r | |
1131 | }\r | |
1132 | CopyMem (Instance->CacheIa, Ia, IaSize);\r | |
1133 | }\r | |
1134 | return EFI_SUCCESS;\r | |
1135 | }\r | |
1136 | \r | |
1137 | /**\r | |
1138 | Append CacheIa to the currrent IA. Meanwhile, clear CacheIa.ValidLifetime to 0.\r | |
1139 | \r | |
1140 | @param[in] Instance The pointer to DHCP6 instance.\r | |
1141 | \r | |
1142 | **/\r | |
1143 | VOID\r | |
1144 | Dhcp6AppendCacheIa (\r | |
1145 | IN DHCP6_INSTANCE *Instance\r | |
1146 | )\r | |
1147 | {\r | |
1148 | UINT8 *Ptr;\r | |
1149 | UINTN Index;\r | |
1150 | UINTN IaSize;\r | |
1151 | UINTN NewIaSize;\r | |
1152 | EFI_DHCP6_IA *Ia;\r | |
1153 | EFI_DHCP6_IA *NewIa;\r | |
1154 | EFI_DHCP6_IA *CacheIa;\r | |
1155 | \r | |
1156 | Ia = Instance->IaCb.Ia;\r | |
1157 | CacheIa = Instance->CacheIa;\r | |
1158 | \r | |
1159 | if ((CacheIa != NULL) && (CacheIa->IaAddressCount != 0)) {\r | |
1160 | //\r | |
1161 | // There are old addresses existing. Merge with current addresses.\r | |
1162 | //\r | |
1163 | NewIaSize = sizeof (EFI_DHCP6_IA) + (Ia->IaAddressCount + CacheIa->IaAddressCount - 1) * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
1164 | NewIa = AllocateZeroPool (NewIaSize);\r | |
1165 | if (NewIa == NULL) {\r | |
1166 | return;\r | |
1167 | }\r | |
1168 | \r | |
1169 | IaSize = sizeof (EFI_DHCP6_IA) + (Ia->IaAddressCount - 1) * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
1170 | CopyMem (NewIa, Ia, IaSize);\r | |
1171 | \r | |
1172 | //\r | |
1173 | // Clear old address.ValidLifetime\r | |
1174 | //\r | |
1175 | for (Index = 0; Index < CacheIa->IaAddressCount; Index++) {\r | |
1176 | CacheIa->IaAddress[Index].ValidLifetime = 0;\r | |
1177 | }\r | |
1178 | \r | |
1179 | NewIa->IaAddressCount += CacheIa->IaAddressCount;\r | |
1180 | Ptr = (UINT8*)&NewIa->IaAddress[Ia->IaAddressCount];\r | |
1181 | CopyMem (Ptr, CacheIa->IaAddress, CacheIa->IaAddressCount * sizeof (EFI_DHCP6_IA_ADDRESS));\r | |
1182 | \r | |
1183 | //\r | |
1184 | // Migrate to the NewIa and free previous.\r | |
1185 | //\r | |
1186 | FreePool (Instance->CacheIa);\r | |
1187 | FreePool (Instance->IaCb.Ia);\r | |
1188 | Instance->CacheIa = NULL;\r | |
1189 | Instance->IaCb.Ia = NewIa;\r | |
1190 | }\r | |
1191 | }\r |