]>
Commit | Line | Data |
---|---|---|
1 | /** @file\r | |
2 | Dhcp6 support functions implementation.\r | |
3 | \r | |
4 | (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>\r | |
5 | Copyright (c) 2009 - 2017, Intel Corporation. All rights reserved.<BR>\r | |
6 | \r | |
7 | This program and the accompanying materials\r | |
8 | are licensed and made available under the terms and conditions of the BSD License\r | |
9 | which accompanies this distribution. The full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php.\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | #include "Dhcp6Impl.h"\r | |
18 | \r | |
19 | \r | |
20 | /**\r | |
21 | Generate client Duid in the format of Duid-llt.\r | |
22 | \r | |
23 | @param[in] Mode The pointer to the mode of SNP.\r | |
24 | \r | |
25 | @retval NULL If it failed to generate a client Id.\r | |
26 | @retval others The pointer to the new client id.\r | |
27 | \r | |
28 | **/\r | |
29 | EFI_DHCP6_DUID *\r | |
30 | Dhcp6GenerateClientId (\r | |
31 | IN EFI_SIMPLE_NETWORK_MODE *Mode\r | |
32 | )\r | |
33 | {\r | |
34 | EFI_STATUS Status;\r | |
35 | EFI_DHCP6_DUID *Duid;\r | |
36 | EFI_TIME Time;\r | |
37 | UINT32 Stamp;\r | |
38 | EFI_GUID Uuid;\r | |
39 | \r | |
40 | \r | |
41 | //\r | |
42 | // Attempt to get client Id from variable to keep it constant.\r | |
43 | // See details in section-9 of rfc-3315.\r | |
44 | //\r | |
45 | GetVariable2 (L"ClientId", &gEfiDhcp6ServiceBindingProtocolGuid, (VOID**)&Duid, NULL);\r | |
46 | if (Duid != NULL) {\r | |
47 | return Duid;\r | |
48 | }\r | |
49 | \r | |
50 | //\r | |
51 | // The format of client identifier option:\r | |
52 | //\r | |
53 | // 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 | |
54 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
55 | // | OPTION_CLIENTID | option-len |\r | |
56 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
57 | // . .\r | |
58 | // . DUID .\r | |
59 | // . (variable length) .\r | |
60 | // . .\r | |
61 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
62 | //\r | |
63 | \r | |
64 | //\r | |
65 | // If System UUID is found from SMBIOS Table, use DUID-UUID type.\r | |
66 | //\r | |
67 | if ((PcdGet8 (PcdDhcp6UidType) == Dhcp6DuidTypeUuid) && !EFI_ERROR (NetLibGetSystemGuid (&Uuid)) && !CompareGuid (&Uuid, &gZeroGuid)) {\r | |
68 | //\r | |
69 | //\r | |
70 | // The format of DUID-UUID:\r | |
71 | // \r | |
72 | // 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 | |
73 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
74 | // | DUID-Type (4) | UUID (128 bits) |\r | |
75 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |\r | |
76 | // | |\r | |
77 | // | |\r | |
78 | // | -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
79 | // | |\r | |
80 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-\r | |
81 | \r | |
82 | //\r | |
83 | // sizeof (option-len + Duid-type + UUID-size) = 20 bytes\r | |
84 | //\r | |
85 | Duid = AllocateZeroPool (2 + 2 + sizeof (EFI_GUID));\r | |
86 | if (Duid == NULL) {\r | |
87 | return NULL;\r | |
88 | }\r | |
89 | \r | |
90 | //\r | |
91 | // sizeof (Duid-type + UUID-size) = 18 bytes\r | |
92 | //\r | |
93 | Duid->Length = (UINT16) (18);\r | |
94 | \r | |
95 | //\r | |
96 | // Set the Duid-type and copy UUID.\r | |
97 | //\r | |
98 | WriteUnaligned16 ((UINT16 *) (Duid->Duid), HTONS (Dhcp6DuidTypeUuid));\r | |
99 | \r | |
100 | CopyMem (Duid->Duid + 2, &Uuid, sizeof(EFI_GUID));\r | |
101 | \r | |
102 | } else {\r | |
103 | \r | |
104 | //\r | |
105 | //\r | |
106 | // The format of DUID-LLT:\r | |
107 | //\r | |
108 | // 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 | |
109 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
110 | // | Duid type (1) | hardware type (16 bits) |\r | |
111 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
112 | // | time (32 bits) |\r | |
113 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
114 | // . .\r | |
115 | // . link-layer address (variable length) .\r | |
116 | // . .\r | |
117 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
118 | //\r | |
119 | \r | |
120 | //\r | |
121 | // Generate a time stamp of the seconds from 2000/1/1, assume 30day/month.\r | |
122 | //\r | |
123 | gRT->GetTime (&Time, NULL);\r | |
124 | Stamp = (UINT32)\r | |
125 | (\r | |
126 | (((((Time.Year - 2000) * 360 + (Time.Month - 1)) * 30 + (Time.Day - 1)) * 24 + Time.Hour) * 60 + Time.Minute) *\r | |
127 | 60 +\r | |
128 | Time.Second\r | |
129 | );\r | |
130 | \r | |
131 | //\r | |
132 | // sizeof (option-len + Duid-type + hardware-type + time) = 10 bytes\r | |
133 | //\r | |
134 | Duid = AllocateZeroPool (10 + Mode->HwAddressSize);\r | |
135 | if (Duid == NULL) {\r | |
136 | return NULL;\r | |
137 | }\r | |
138 | \r | |
139 | //\r | |
140 | // sizeof (Duid-type + hardware-type + time) = 8 bytes\r | |
141 | //\r | |
142 | Duid->Length = (UINT16) (Mode->HwAddressSize + 8);\r | |
143 | \r | |
144 | //\r | |
145 | // Set the Duid-type, hardware-type, time and copy the hardware address.\r | |
146 | //\r | |
147 | WriteUnaligned16 ((UINT16 *) ((UINT8 *) Duid + OFFSET_OF (EFI_DHCP6_DUID, Duid)), HTONS (Dhcp6DuidTypeLlt));\r | |
148 | WriteUnaligned16 ((UINT16 *) ((UINT8 *) Duid + OFFSET_OF (EFI_DHCP6_DUID, Duid) + 2), HTONS (NET_IFTYPE_ETHERNET));\r | |
149 | WriteUnaligned32 ((UINT32 *) ((UINT8 *) Duid + OFFSET_OF (EFI_DHCP6_DUID, Duid) + 4), HTONL (Stamp));\r | |
150 | \r | |
151 | CopyMem (Duid->Duid + 8, &Mode->CurrentAddress, Mode->HwAddressSize);\r | |
152 | }\r | |
153 | \r | |
154 | Status = gRT->SetVariable (\r | |
155 | L"ClientId",\r | |
156 | &gEfiDhcp6ServiceBindingProtocolGuid,\r | |
157 | (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS),\r | |
158 | Duid->Length + 2,\r | |
159 | (VOID *) Duid\r | |
160 | );\r | |
161 | if (EFI_ERROR (Status)) {\r | |
162 | FreePool (Duid);\r | |
163 | return NULL;\r | |
164 | }\r | |
165 | \r | |
166 | return Duid;\r | |
167 | }\r | |
168 | \r | |
169 | \r | |
170 | /**\r | |
171 | Copy the Dhcp6 configure data.\r | |
172 | \r | |
173 | @param[in] DstCfg The pointer to the destination configure data.\r | |
174 | @param[in] SorCfg The pointer to the source configure data.\r | |
175 | \r | |
176 | @retval EFI_SUCCESS Copy the content from SorCfg from DstCfg successfully.\r | |
177 | @retval EFI_OUT_OF_RESOURCES Required system resources could not be allocated.\r | |
178 | \r | |
179 | **/\r | |
180 | EFI_STATUS\r | |
181 | Dhcp6CopyConfigData (\r | |
182 | IN EFI_DHCP6_CONFIG_DATA *DstCfg,\r | |
183 | IN EFI_DHCP6_CONFIG_DATA *SorCfg\r | |
184 | )\r | |
185 | {\r | |
186 | UINTN Index;\r | |
187 | UINTN OptionListSize;\r | |
188 | UINTN OptionSize;\r | |
189 | \r | |
190 | CopyMem (DstCfg, SorCfg, sizeof (EFI_DHCP6_CONFIG_DATA));\r | |
191 | \r | |
192 | //\r | |
193 | // Allocate another buffer for solicitretransmission, and copy it.\r | |
194 | //\r | |
195 | if (SorCfg->SolicitRetransmission != NULL) {\r | |
196 | \r | |
197 | DstCfg->SolicitRetransmission = AllocateZeroPool (sizeof (EFI_DHCP6_RETRANSMISSION));\r | |
198 | \r | |
199 | if (DstCfg->SolicitRetransmission == NULL) {\r | |
200 | //\r | |
201 | // Error will be handled out of this function.\r | |
202 | //\r | |
203 | return EFI_OUT_OF_RESOURCES;\r | |
204 | }\r | |
205 | \r | |
206 | CopyMem (\r | |
207 | DstCfg->SolicitRetransmission,\r | |
208 | SorCfg->SolicitRetransmission,\r | |
209 | sizeof (EFI_DHCP6_RETRANSMISSION)\r | |
210 | );\r | |
211 | }\r | |
212 | \r | |
213 | if (SorCfg->OptionList != NULL && SorCfg->OptionCount != 0) {\r | |
214 | \r | |
215 | OptionListSize = SorCfg->OptionCount * sizeof (EFI_DHCP6_PACKET_OPTION *);\r | |
216 | DstCfg->OptionList = AllocateZeroPool (OptionListSize);\r | |
217 | \r | |
218 | if (DstCfg->OptionList == NULL) {\r | |
219 | //\r | |
220 | // Error will be handled out of this function.\r | |
221 | //\r | |
222 | return EFI_OUT_OF_RESOURCES;\r | |
223 | }\r | |
224 | \r | |
225 | for (Index = 0; Index < SorCfg->OptionCount; Index++) {\r | |
226 | \r | |
227 | OptionSize = NTOHS (SorCfg->OptionList[Index]->OpLen) + 4;\r | |
228 | DstCfg->OptionList[Index] = AllocateZeroPool (OptionSize);\r | |
229 | \r | |
230 | if (DstCfg->OptionList[Index] == NULL) {\r | |
231 | //\r | |
232 | // Error will be handled out of this function.\r | |
233 | //\r | |
234 | return EFI_OUT_OF_RESOURCES;\r | |
235 | }\r | |
236 | \r | |
237 | CopyMem (\r | |
238 | DstCfg->OptionList[Index],\r | |
239 | SorCfg->OptionList[Index],\r | |
240 | OptionSize\r | |
241 | );\r | |
242 | }\r | |
243 | }\r | |
244 | \r | |
245 | return EFI_SUCCESS;\r | |
246 | }\r | |
247 | \r | |
248 | \r | |
249 | /**\r | |
250 | Clean up the configure data.\r | |
251 | \r | |
252 | @param[in, out] CfgData The pointer to the configure data.\r | |
253 | \r | |
254 | **/\r | |
255 | VOID\r | |
256 | Dhcp6CleanupConfigData (\r | |
257 | IN OUT EFI_DHCP6_CONFIG_DATA *CfgData\r | |
258 | )\r | |
259 | {\r | |
260 | UINTN Index;\r | |
261 | \r | |
262 | ASSERT (CfgData != NULL);\r | |
263 | //\r | |
264 | // Clean up all fields in config data including the reference buffers, but do\r | |
265 | // not free the config data buffer itself.\r | |
266 | //\r | |
267 | if (CfgData->OptionList != NULL) {\r | |
268 | for (Index = 0; Index < CfgData->OptionCount; Index++) {\r | |
269 | if (CfgData->OptionList[Index] != NULL) {\r | |
270 | FreePool (CfgData->OptionList[Index]);\r | |
271 | }\r | |
272 | }\r | |
273 | FreePool (CfgData->OptionList);\r | |
274 | }\r | |
275 | \r | |
276 | if (CfgData->SolicitRetransmission != NULL) {\r | |
277 | FreePool (CfgData->SolicitRetransmission);\r | |
278 | }\r | |
279 | \r | |
280 | ZeroMem (CfgData, sizeof (EFI_DHCP6_CONFIG_DATA));\r | |
281 | }\r | |
282 | \r | |
283 | \r | |
284 | /**\r | |
285 | Clean up the mode data.\r | |
286 | \r | |
287 | @param[in, out] ModeData The pointer to the mode data.\r | |
288 | \r | |
289 | **/\r | |
290 | VOID\r | |
291 | Dhcp6CleanupModeData (\r | |
292 | IN OUT EFI_DHCP6_MODE_DATA *ModeData\r | |
293 | )\r | |
294 | {\r | |
295 | ASSERT (ModeData != NULL);\r | |
296 | //\r | |
297 | // Clean up all fields in mode data including the reference buffers, but do\r | |
298 | // not free the mode data buffer itself.\r | |
299 | //\r | |
300 | if (ModeData->ClientId != NULL) {\r | |
301 | FreePool (ModeData->ClientId);\r | |
302 | }\r | |
303 | \r | |
304 | if (ModeData->Ia != NULL) {\r | |
305 | \r | |
306 | if (ModeData->Ia->ReplyPacket != NULL) {\r | |
307 | FreePool (ModeData->Ia->ReplyPacket);\r | |
308 | }\r | |
309 | FreePool (ModeData->Ia);\r | |
310 | }\r | |
311 | \r | |
312 | ZeroMem (ModeData, sizeof (EFI_DHCP6_MODE_DATA));\r | |
313 | }\r | |
314 | \r | |
315 | \r | |
316 | /**\r | |
317 | Calculate the expire time by the algorithm defined in rfc.\r | |
318 | \r | |
319 | @param[in] Base The base value of the time.\r | |
320 | @param[in] IsFirstRt If TRUE, it is the first time to calculate expire time.\r | |
321 | @param[in] NeedSigned If TRUE, the the signed factor is needed.\r | |
322 | \r | |
323 | @return Expire The calculated result for the new expire time.\r | |
324 | \r | |
325 | **/\r | |
326 | UINT32\r | |
327 | Dhcp6CalculateExpireTime (\r | |
328 | IN UINT32 Base,\r | |
329 | IN BOOLEAN IsFirstRt,\r | |
330 | IN BOOLEAN NeedSigned\r | |
331 | )\r | |
332 | {\r | |
333 | EFI_TIME Time;\r | |
334 | BOOLEAN Signed;\r | |
335 | UINT32 Seed;\r | |
336 | UINT32 Expire;\r | |
337 | \r | |
338 | //\r | |
339 | // Take the 10bits of microsecond in system time as a uniform distribution.\r | |
340 | // Take the 10th bit as a flag to determine it's signed or not.\r | |
341 | //\r | |
342 | gRT->GetTime (&Time, NULL);\r | |
343 | Seed = ((Time.Nanosecond >> 10) & DHCP6_10_BIT_MASK);\r | |
344 | Signed = (BOOLEAN) ((((Time.Nanosecond >> 9) & 0x01) != 0) ? TRUE : FALSE);\r | |
345 | Signed = (BOOLEAN) (NeedSigned ? Signed : FALSE);\r | |
346 | \r | |
347 | //\r | |
348 | // Calculate expire by the following algo:\r | |
349 | // 1. base + base * (-0.1 ~ 0) for the first solicit\r | |
350 | // 2. base + base * (-0.1 ~ 0.1) for the first other messages\r | |
351 | // 3. 2 * base + base * (-0.1 ~ 0.1) for the subsequent all messages\r | |
352 | // 4. base + base * (-0.1 ~ 0) for the more than mrt timeout\r | |
353 | //\r | |
354 | // The (Seed / 0x3ff / 10) is used to a random range (0, 0.1).\r | |
355 | //\r | |
356 | 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 = Base + (UINT32) (Base * Seed / DHCP6_10_BIT_MASK / 10);\r | |
363 | \r | |
364 | } else if (!IsFirstRt && Signed) {\r | |
365 | \r | |
366 | Expire = 2 * Base - (UINT32) (Base * Seed / DHCP6_10_BIT_MASK / 10);\r | |
367 | \r | |
368 | } else {\r | |
369 | \r | |
370 | Expire = 2 * Base + (UINT32) (Base * Seed / DHCP6_10_BIT_MASK / 10);\r | |
371 | }\r | |
372 | \r | |
373 | Expire = (Expire != 0) ? Expire : 1;\r | |
374 | \r | |
375 | return Expire;\r | |
376 | }\r | |
377 | \r | |
378 | \r | |
379 | /**\r | |
380 | Calculate the lease time by the algorithm defined in rfc.\r | |
381 | \r | |
382 | @param[in] IaCb The pointer to the Ia control block.\r | |
383 | \r | |
384 | **/\r | |
385 | VOID\r | |
386 | Dhcp6CalculateLeaseTime (\r | |
387 | IN DHCP6_IA_CB *IaCb\r | |
388 | )\r | |
389 | {\r | |
390 | UINT32 MinLt;\r | |
391 | UINT32 MaxLt;\r | |
392 | UINTN Index;\r | |
393 | \r | |
394 | ASSERT (IaCb->Ia->IaAddressCount > 0);\r | |
395 | \r | |
396 | MinLt = (UINT32) (-1);\r | |
397 | MaxLt = 0;\r | |
398 | \r | |
399 | //\r | |
400 | // Calculate minlt as min of all valid life time, and maxlt as max of all\r | |
401 | // valid life time.\r | |
402 | //\r | |
403 | for (Index = 0; Index < IaCb->Ia->IaAddressCount; Index++) {\r | |
404 | MinLt = MIN (MinLt, IaCb->Ia->IaAddress[Index].ValidLifetime);\r | |
405 | MaxLt = MAX (MinLt, IaCb->Ia->IaAddress[Index].ValidLifetime);\r | |
406 | }\r | |
407 | \r | |
408 | //\r | |
409 | // Take 50% minlt as t1, and 80% maxlt as t2 if Dhcp6 server doesn't offer\r | |
410 | // such information.\r | |
411 | //\r | |
412 | IaCb->T1 = (IaCb->T1 != 0) ? IaCb->T1 : (UINT32)(MinLt * 5 / 10);\r | |
413 | IaCb->T2 = (IaCb->T2 != 0) ? IaCb->T2 : (UINT32)(MinLt * 8 / 10);\r | |
414 | IaCb->AllExpireTime = MaxLt;\r | |
415 | IaCb->LeaseTime = 0;\r | |
416 | }\r | |
417 | \r | |
418 | \r | |
419 | /**\r | |
420 | Check whether the addresses are all included by the configured Ia.\r | |
421 | \r | |
422 | @param[in] Ia The pointer to the Ia.\r | |
423 | @param[in] AddressCount The number of addresses.\r | |
424 | @param[in] Addresses The pointer to the addresses buffer.\r | |
425 | \r | |
426 | @retval EFI_SUCCESS The addresses are all included by the configured IA.\r | |
427 | @retval EFI_NOT_FOUND The addresses are not included by the configured IA.\r | |
428 | \r | |
429 | **/\r | |
430 | EFI_STATUS\r | |
431 | Dhcp6CheckAddress (\r | |
432 | IN EFI_DHCP6_IA *Ia,\r | |
433 | IN UINT32 AddressCount,\r | |
434 | IN EFI_IPv6_ADDRESS *Addresses\r | |
435 | )\r | |
436 | {\r | |
437 | UINTN Index1;\r | |
438 | UINTN Index2;\r | |
439 | BOOLEAN Found;\r | |
440 | \r | |
441 | //\r | |
442 | // Check whether the addresses are all included by the configured IA. And it\r | |
443 | // will return success if address count is zero, which means all addresses.\r | |
444 | //\r | |
445 | for (Index1 = 0; Index1 < AddressCount; Index1++) {\r | |
446 | \r | |
447 | Found = FALSE;\r | |
448 | \r | |
449 | for (Index2 = 0; Index2 < Ia->IaAddressCount; Index2++) {\r | |
450 | \r | |
451 | if (CompareMem (\r | |
452 | &Addresses[Index1],\r | |
453 | &Ia->IaAddress[Index2],\r | |
454 | sizeof (EFI_IPv6_ADDRESS)\r | |
455 | ) == 0) {\r | |
456 | \r | |
457 | Found = TRUE;\r | |
458 | break;\r | |
459 | }\r | |
460 | }\r | |
461 | \r | |
462 | if (!Found) {\r | |
463 | return EFI_NOT_FOUND;\r | |
464 | }\r | |
465 | }\r | |
466 | \r | |
467 | return EFI_SUCCESS;\r | |
468 | }\r | |
469 | \r | |
470 | \r | |
471 | /**\r | |
472 | Deprive the addresses from current Ia, and generate another eliminated Ia.\r | |
473 | \r | |
474 | @param[in] Ia The pointer to the Ia.\r | |
475 | @param[in] AddressCount The number of addresses.\r | |
476 | @param[in] Addresses The pointer to the addresses buffer.\r | |
477 | \r | |
478 | @retval NULL If it failed to generate the deprived Ia.\r | |
479 | @retval others The pointer to the deprived Ia.\r | |
480 | \r | |
481 | **/\r | |
482 | EFI_DHCP6_IA *\r | |
483 | Dhcp6DepriveAddress (\r | |
484 | IN EFI_DHCP6_IA *Ia,\r | |
485 | IN UINT32 AddressCount,\r | |
486 | IN EFI_IPv6_ADDRESS *Addresses\r | |
487 | )\r | |
488 | {\r | |
489 | EFI_DHCP6_IA *IaCopy;\r | |
490 | UINTN IaCopySize;\r | |
491 | UINTN Index1;\r | |
492 | UINTN Index2;\r | |
493 | BOOLEAN Found;\r | |
494 | \r | |
495 | if (AddressCount == 0) {\r | |
496 | //\r | |
497 | // It means release all Ia addresses if address count is zero.\r | |
498 | //\r | |
499 | AddressCount = Ia->IaAddressCount;\r | |
500 | }\r | |
501 | \r | |
502 | ASSERT (AddressCount != 0);\r | |
503 | \r | |
504 | IaCopySize = sizeof (EFI_DHCP6_IA) + (AddressCount - 1) * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
505 | IaCopy = AllocateZeroPool (IaCopySize);\r | |
506 | \r | |
507 | if (IaCopy == NULL) {\r | |
508 | return NULL;\r | |
509 | }\r | |
510 | \r | |
511 | if (AddressCount == Ia->IaAddressCount) {\r | |
512 | //\r | |
513 | // If release all Ia addresses, just copy the configured Ia and then set\r | |
514 | // its address count as zero.\r | |
515 | // We may decline/release part of addresses at the begining. So it's a\r | |
516 | // forwarding step to update address infor for decline/release, while the\r | |
517 | // other infor such as Ia state will be updated when receiving reply.\r | |
518 | //\r | |
519 | CopyMem (IaCopy, Ia, IaCopySize);\r | |
520 | Ia->IaAddressCount = 0;\r | |
521 | return IaCopy;\r | |
522 | }\r | |
523 | \r | |
524 | CopyMem (IaCopy, Ia, sizeof (EFI_DHCP6_IA));\r | |
525 | \r | |
526 | //\r | |
527 | // Move the addresses from the Ia of instance to the deprived Ia.\r | |
528 | //\r | |
529 | for (Index1 = 0; Index1 < AddressCount; Index1++) {\r | |
530 | \r | |
531 | Found = FALSE;\r | |
532 | \r | |
533 | for (Index2 = 0; Index2 < Ia->IaAddressCount; Index2++) {\r | |
534 | \r | |
535 | if (CompareMem (\r | |
536 | &Addresses[Index1],\r | |
537 | &Ia->IaAddress[Index2],\r | |
538 | sizeof (EFI_IPv6_ADDRESS)\r | |
539 | ) == 0) {\r | |
540 | //\r | |
541 | // Copy the deprived address to the copy of Ia\r | |
542 | //\r | |
543 | CopyMem (\r | |
544 | &IaCopy->IaAddress[Index1],\r | |
545 | &Ia->IaAddress[Index2],\r | |
546 | sizeof (EFI_DHCP6_IA_ADDRESS)\r | |
547 | );\r | |
548 | //\r | |
549 | // Delete the deprived address from the instance Ia\r | |
550 | //\r | |
551 | if (Index2 + 1 < Ia->IaAddressCount) {\r | |
552 | CopyMem (\r | |
553 | &Ia->IaAddress[Index2],\r | |
554 | &Ia->IaAddress[Index2 + 1],\r | |
555 | (Ia->IaAddressCount - Index2 - 1) * sizeof (EFI_DHCP6_IA_ADDRESS)\r | |
556 | );\r | |
557 | }\r | |
558 | Found = TRUE;\r | |
559 | break;\r | |
560 | }\r | |
561 | }\r | |
562 | ASSERT (Found == TRUE);\r | |
563 | }\r | |
564 | \r | |
565 | Ia->IaAddressCount -= AddressCount;\r | |
566 | IaCopy->IaAddressCount = AddressCount;\r | |
567 | \r | |
568 | return IaCopy;\r | |
569 | }\r | |
570 | \r | |
571 | \r | |
572 | /**\r | |
573 | The dummy ext buffer free callback routine.\r | |
574 | \r | |
575 | @param[in] Arg The pointer to the parameter.\r | |
576 | \r | |
577 | **/\r | |
578 | VOID\r | |
579 | EFIAPI\r | |
580 | Dhcp6DummyExtFree (\r | |
581 | IN VOID *Arg\r | |
582 | )\r | |
583 | {\r | |
584 | }\r | |
585 | \r | |
586 | \r | |
587 | /**\r | |
588 | The callback routine once message transmitted.\r | |
589 | \r | |
590 | @param[in] Wrap The pointer to the received net buffer.\r | |
591 | @param[in] EndPoint The pointer to the udp end point.\r | |
592 | @param[in] IoStatus The return status from udp io.\r | |
593 | @param[in] Context The opaque parameter to the function.\r | |
594 | \r | |
595 | **/\r | |
596 | VOID\r | |
597 | EFIAPI\r | |
598 | Dhcp6OnTransmitted (\r | |
599 | IN NET_BUF *Wrap,\r | |
600 | IN UDP_END_POINT *EndPoint,\r | |
601 | IN EFI_STATUS IoStatus,\r | |
602 | IN VOID *Context\r | |
603 | )\r | |
604 | {\r | |
605 | NetbufFree (Wrap);\r | |
606 | }\r | |
607 | \r | |
608 | \r | |
609 | /**\r | |
610 | Append the option to Buf, and move Buf to the end.\r | |
611 | \r | |
612 | @param[in, out] Buf The pointer to the buffer.\r | |
613 | @param[in] OptType The option type.\r | |
614 | @param[in] OptLen The length of option contents.\r | |
615 | @param[in] Data The pointer to the option content.\r | |
616 | \r | |
617 | @return Buf The position to append the next option.\r | |
618 | \r | |
619 | **/\r | |
620 | UINT8 *\r | |
621 | Dhcp6AppendOption (\r | |
622 | IN OUT UINT8 *Buf,\r | |
623 | IN UINT16 OptType,\r | |
624 | IN UINT16 OptLen,\r | |
625 | IN UINT8 *Data\r | |
626 | )\r | |
627 | {\r | |
628 | //\r | |
629 | // The format of Dhcp6 option:\r | |
630 | //\r | |
631 | // 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 | |
632 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
633 | // | option-code | option-len (option data) |\r | |
634 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
635 | // | option-data |\r | |
636 | // | (option-len octets) |\r | |
637 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
638 | //\r | |
639 | \r | |
640 | ASSERT (OptLen != 0);\r | |
641 | \r | |
642 | WriteUnaligned16 ((UINT16 *) Buf, OptType);\r | |
643 | Buf += 2;\r | |
644 | WriteUnaligned16 ((UINT16 *) Buf, OptLen);\r | |
645 | Buf += 2;\r | |
646 | CopyMem (Buf, Data, NTOHS (OptLen));\r | |
647 | Buf += NTOHS (OptLen);\r | |
648 | \r | |
649 | return Buf;\r | |
650 | }\r | |
651 | \r | |
652 | /**\r | |
653 | Append the appointed IA Address option to Buf, and move Buf to the end.\r | |
654 | \r | |
655 | @param[in, out] Buf The pointer to the position to append.\r | |
656 | @param[in] IaAddr The pointer to the IA Address.\r | |
657 | @param[in] MessageType Message type of DHCP6 package.\r | |
658 | \r | |
659 | @return Buf The position to append the next option.\r | |
660 | \r | |
661 | **/\r | |
662 | UINT8 *\r | |
663 | Dhcp6AppendIaAddrOption (\r | |
664 | IN OUT UINT8 *Buf,\r | |
665 | IN EFI_DHCP6_IA_ADDRESS *IaAddr,\r | |
666 | IN UINT32 MessageType\r | |
667 | )\r | |
668 | {\r | |
669 | \r | |
670 | // The format of the IA Address option is:\r | |
671 | //\r | |
672 | // 0 1 2 3\r | |
673 | // 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 | |
674 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
675 | // | OPTION_IAADDR | option-len |\r | |
676 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
677 | // | |\r | |
678 | // | IPv6 address |\r | |
679 | // | |\r | |
680 | // | |\r | |
681 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
682 | // | preferred-lifetime |\r | |
683 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
684 | // | valid-lifetime |\r | |
685 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
686 | // . .\r | |
687 | // . IAaddr-options .\r | |
688 | // . .\r | |
689 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
690 | \r | |
691 | //\r | |
692 | // Fill the value of Ia Address option type\r | |
693 | //\r | |
694 | WriteUnaligned16 ((UINT16 *) Buf, HTONS (Dhcp6OptIaAddr));\r | |
695 | Buf += 2;\r | |
696 | \r | |
697 | WriteUnaligned16 ((UINT16 *) Buf, HTONS (sizeof (EFI_DHCP6_IA_ADDRESS)));\r | |
698 | Buf += 2;\r | |
699 | \r | |
700 | CopyMem (Buf, &IaAddr->IpAddress, sizeof(EFI_IPv6_ADDRESS));\r | |
701 | Buf += sizeof(EFI_IPv6_ADDRESS);\r | |
702 | \r | |
703 | //\r | |
704 | // Fill the value of preferred-lifetime and valid-lifetime.\r | |
705 | // According to RFC3315 Chapter 18.1.2, the preferred-lifetime and valid-lifetime fields\r | |
706 | // should set to 0 when initiate a Confirm message.\r | |
707 | //\r | |
708 | if (MessageType != Dhcp6MsgConfirm) {\r | |
709 | WriteUnaligned32 ((UINT32 *) Buf, HTONL (IaAddr->PreferredLifetime));\r | |
710 | }\r | |
711 | Buf += 4;\r | |
712 | \r | |
713 | if (MessageType != Dhcp6MsgConfirm) {\r | |
714 | WriteUnaligned32 ((UINT32 *) Buf, HTONL (IaAddr->ValidLifetime));\r | |
715 | }\r | |
716 | Buf += 4;\r | |
717 | \r | |
718 | return Buf;\r | |
719 | }\r | |
720 | \r | |
721 | \r | |
722 | /**\r | |
723 | Append the appointed Ia option to Buf, and move Buf to the end.\r | |
724 | \r | |
725 | @param[in, out] Buf The pointer to the position to append.\r | |
726 | @param[in] Ia The pointer to the Ia.\r | |
727 | @param[in] T1 The time of T1.\r | |
728 | @param[in] T2 The time of T2.\r | |
729 | @param[in] MessageType Message type of DHCP6 package.\r | |
730 | \r | |
731 | @return Buf The position to append the next Ia option.\r | |
732 | \r | |
733 | **/\r | |
734 | UINT8 *\r | |
735 | Dhcp6AppendIaOption (\r | |
736 | IN OUT UINT8 *Buf,\r | |
737 | IN EFI_DHCP6_IA *Ia,\r | |
738 | IN UINT32 T1,\r | |
739 | IN UINT32 T2,\r | |
740 | IN UINT32 MessageType\r | |
741 | )\r | |
742 | {\r | |
743 | UINT8 *AddrOpt;\r | |
744 | UINT16 *Len;\r | |
745 | UINTN Index;\r | |
746 | \r | |
747 | //\r | |
748 | // The format of IA_NA and IA_TA option:\r | |
749 | //\r | |
750 | // 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 | |
751 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
752 | // | OPTION_IA_NA | option-len |\r | |
753 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
754 | // | IAID (4 octets) |\r | |
755 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
756 | // | T1 (only for IA_NA) |\r | |
757 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
758 | // | T2 (only for IA_NA) |\r | |
759 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
760 | // | |\r | |
761 | // . IA_NA-options/IA_TA-options .\r | |
762 | // . .\r | |
763 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
764 | //\r | |
765 | \r | |
766 | //\r | |
767 | // Fill the value of Ia option type\r | |
768 | //\r | |
769 | WriteUnaligned16 ((UINT16 *) Buf, HTONS (Ia->Descriptor.Type));\r | |
770 | Buf += 2;\r | |
771 | \r | |
772 | //\r | |
773 | // Fill the len of Ia option later, keep the pointer first\r | |
774 | //\r | |
775 | Len = (UINT16 *) Buf;\r | |
776 | Buf += 2;\r | |
777 | \r | |
778 | //\r | |
779 | // Fill the value of iaid\r | |
780 | //\r | |
781 | WriteUnaligned32 ((UINT32 *) Buf, HTONL (Ia->Descriptor.IaId));\r | |
782 | Buf += 4;\r | |
783 | \r | |
784 | //\r | |
785 | // Fill the value of t1 and t2 if iana, keep it 0xffffffff if no specified.\r | |
786 | //\r | |
787 | if (Ia->Descriptor.Type == Dhcp6OptIana) {\r | |
788 | WriteUnaligned32 ((UINT32 *) Buf, HTONL ((T1 != 0) ? T1 : 0xffffffff));\r | |
789 | Buf += 4;\r | |
790 | WriteUnaligned32 ((UINT32 *) Buf, HTONL ((T2 != 0) ? T2 : 0xffffffff));\r | |
791 | Buf += 4;\r | |
792 | }\r | |
793 | \r | |
794 | //\r | |
795 | // Fill all the addresses belong to the Ia\r | |
796 | //\r | |
797 | for (Index = 0; Index < Ia->IaAddressCount; Index++) {\r | |
798 | AddrOpt = (UINT8 *) Ia->IaAddress + Index * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
799 | Buf = Dhcp6AppendIaAddrOption (Buf, (EFI_DHCP6_IA_ADDRESS *) AddrOpt, MessageType);\r | |
800 | }\r | |
801 | \r | |
802 | //\r | |
803 | // Fill the value of Ia option length\r | |
804 | //\r | |
805 | *Len = HTONS ((UINT16) (Buf - (UINT8 *) Len - 2));\r | |
806 | \r | |
807 | return Buf;\r | |
808 | }\r | |
809 | \r | |
810 | /**\r | |
811 | Append the appointed Elapsed time option to Buf, and move Buf to the end.\r | |
812 | \r | |
813 | @param[in, out] Buf The pointer to the position to append.\r | |
814 | @param[in] Instance The pointer to the Dhcp6 instance.\r | |
815 | @param[out] Elapsed The pointer to the elapsed time value in\r | |
816 | the generated packet.\r | |
817 | \r | |
818 | @return Buf The position to append the next Ia option.\r | |
819 | \r | |
820 | **/\r | |
821 | UINT8 *\r | |
822 | Dhcp6AppendETOption (\r | |
823 | IN OUT UINT8 *Buf,\r | |
824 | IN DHCP6_INSTANCE *Instance,\r | |
825 | OUT UINT16 **Elapsed\r | |
826 | )\r | |
827 | {\r | |
828 | //\r | |
829 | // The format of elapsed time option:\r | |
830 | //\r | |
831 | // 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 | |
832 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
833 | // | OPTION_ELAPSED_TIME | option-len |\r | |
834 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
835 | // | elapsed-time |\r | |
836 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
837 | //\r | |
838 | \r | |
839 | //\r | |
840 | // Fill the value of elapsed-time option type.\r | |
841 | //\r | |
842 | WriteUnaligned16 ((UINT16 *) Buf, HTONS (Dhcp6OptElapsedTime));\r | |
843 | Buf += 2;\r | |
844 | \r | |
845 | //\r | |
846 | // Fill the len of elapsed-time option, which is fixed.\r | |
847 | //\r | |
848 | WriteUnaligned16 ((UINT16 *) Buf, HTONS(2));\r | |
849 | Buf += 2;\r | |
850 | \r | |
851 | //\r | |
852 | // Fill in elapsed time value with 0 value for now. The actual value is\r | |
853 | // filled in later just before the packet is transmitted.\r | |
854 | //\r | |
855 | WriteUnaligned16 ((UINT16 *) Buf, HTONS(0));\r | |
856 | *Elapsed = (UINT16 *) Buf;\r | |
857 | Buf += 2;\r | |
858 | \r | |
859 | return Buf;\r | |
860 | }\r | |
861 | \r | |
862 | /**\r | |
863 | Set the elapsed time based on the given instance and the pointer to the\r | |
864 | elapsed time option.\r | |
865 | \r | |
866 | @param[in] Elapsed The pointer to the position to append.\r | |
867 | @param[in] Instance The pointer to the Dhcp6 instance.\r | |
868 | \r | |
869 | **/\r | |
870 | VOID\r | |
871 | SetElapsedTime (\r | |
872 | IN UINT16 *Elapsed,\r | |
873 | IN DHCP6_INSTANCE *Instance\r | |
874 | )\r | |
875 | {\r | |
876 | EFI_TIME Time;\r | |
877 | UINT64 CurrentStamp;\r | |
878 | UINT64 ElapsedTimeValue;\r | |
879 | \r | |
880 | //\r | |
881 | // Generate a time stamp of the centiseconds from 2000/1/1, assume 30day/month.\r | |
882 | //\r | |
883 | gRT->GetTime (&Time, NULL);\r | |
884 | CurrentStamp = (UINT64)\r | |
885 | (\r | |
886 | ((((((Time.Year - 2000) * 360 +\r | |
887 | (Time.Month - 1)) * 30 +\r | |
888 | (Time.Day - 1)) * 24 + Time.Hour) * 60 +\r | |
889 | Time.Minute) * 60 + Time.Second) * 100\r | |
890 | + DivU64x32(Time.Nanosecond, 10000000)\r | |
891 | );\r | |
892 | \r | |
893 | //\r | |
894 | // Sentinel value of 0 means that this is the first DHCP packet that we are\r | |
895 | // sending and that we need to initialize the value. First DHCP message\r | |
896 | // gets 0 elapsed-time. Otherwise, calculate based on StartTime.\r | |
897 | //\r | |
898 | if (Instance->StartTime == 0) {\r | |
899 | ElapsedTimeValue = 0;\r | |
900 | Instance->StartTime = CurrentStamp;\r | |
901 | } else {\r | |
902 | ElapsedTimeValue = CurrentStamp - Instance->StartTime;\r | |
903 | \r | |
904 | //\r | |
905 | // If elapsed time cannot fit in two bytes, set it to 0xffff.\r | |
906 | //\r | |
907 | if (ElapsedTimeValue > 0xffff) {\r | |
908 | ElapsedTimeValue = 0xffff;\r | |
909 | }\r | |
910 | }\r | |
911 | WriteUnaligned16 (Elapsed, HTONS((UINT16) ElapsedTimeValue));\r | |
912 | }\r | |
913 | \r | |
914 | \r | |
915 | /**\r | |
916 | Seek the address of the first byte of the option header.\r | |
917 | \r | |
918 | @param[in] Buf The pointer to the buffer.\r | |
919 | @param[in] SeekLen The length to seek.\r | |
920 | @param[in] OptType The option type.\r | |
921 | \r | |
922 | @retval NULL If it failed to seek the option.\r | |
923 | @retval others The position to the option.\r | |
924 | \r | |
925 | **/\r | |
926 | UINT8 *\r | |
927 | Dhcp6SeekOption (\r | |
928 | IN UINT8 *Buf,\r | |
929 | IN UINT32 SeekLen,\r | |
930 | IN UINT16 OptType\r | |
931 | )\r | |
932 | {\r | |
933 | UINT8 *Cursor;\r | |
934 | UINT8 *Option;\r | |
935 | UINT16 DataLen;\r | |
936 | UINT16 OpCode;\r | |
937 | \r | |
938 | Option = NULL;\r | |
939 | Cursor = Buf;\r | |
940 | \r | |
941 | //\r | |
942 | // The format of Dhcp6 option refers to Dhcp6AppendOption().\r | |
943 | //\r | |
944 | while (Cursor < Buf + SeekLen) {\r | |
945 | OpCode = ReadUnaligned16 ((UINT16 *) Cursor);\r | |
946 | if (OpCode == HTONS (OptType)) {\r | |
947 | Option = Cursor;\r | |
948 | break;\r | |
949 | }\r | |
950 | DataLen = NTOHS (ReadUnaligned16 ((UINT16 *) (Cursor + 2)));\r | |
951 | Cursor += (DataLen + 4);\r | |
952 | }\r | |
953 | \r | |
954 | return Option;\r | |
955 | }\r | |
956 | \r | |
957 | \r | |
958 | /**\r | |
959 | Seek the address of the first byte of the Ia option header.\r | |
960 | \r | |
961 | @param[in] Buf The pointer to the buffer.\r | |
962 | @param[in] SeekLen The length to seek.\r | |
963 | @param[in] IaDesc The pointer to the Ia descriptor.\r | |
964 | \r | |
965 | @retval NULL If it failed to seek the Ia option.\r | |
966 | @retval others The position to the Ia option.\r | |
967 | \r | |
968 | **/\r | |
969 | UINT8 *\r | |
970 | Dhcp6SeekIaOption (\r | |
971 | IN UINT8 *Buf,\r | |
972 | IN UINT32 SeekLen,\r | |
973 | IN EFI_DHCP6_IA_DESCRIPTOR *IaDesc\r | |
974 | )\r | |
975 | {\r | |
976 | UINT8 *Cursor;\r | |
977 | UINT8 *Option;\r | |
978 | UINT16 DataLen;\r | |
979 | UINT16 OpCode;\r | |
980 | UINT32 IaId;\r | |
981 | \r | |
982 | //\r | |
983 | // The format of IA_NA and IA_TA option refers to Dhcp6AppendIaOption().\r | |
984 | //\r | |
985 | Option = NULL;\r | |
986 | Cursor = Buf;\r | |
987 | \r | |
988 | while (Cursor < Buf + SeekLen) {\r | |
989 | OpCode = ReadUnaligned16 ((UINT16 *) Cursor);\r | |
990 | IaId = ReadUnaligned32 ((UINT32 *) (Cursor + 4));\r | |
991 | if (OpCode == HTONS (IaDesc->Type) && IaId == HTONL (IaDesc->IaId)) {\r | |
992 | Option = Cursor;\r | |
993 | break;\r | |
994 | }\r | |
995 | DataLen = NTOHS (ReadUnaligned16 ((UINT16 *) (Cursor + 2)));\r | |
996 | Cursor += (DataLen + 4);\r | |
997 | }\r | |
998 | \r | |
999 | return Option;\r | |
1000 | }\r | |
1001 | \r | |
1002 | /**\r | |
1003 | Check whether the incoming IPv6 address in IaAddr is one of the maintained \r | |
1004 | addresses in the IA control blcok.\r | |
1005 | \r | |
1006 | @param[in] IaAddr The pointer to the IA Address to be checked.\r | |
1007 | @param[in] CurrentIa The pointer to the IA in IA control block.\r | |
1008 | \r | |
1009 | @retval TRUE Yes, this Address is already in IA control block.\r | |
1010 | @retval FALSE No, this Address is NOT in IA control block.\r | |
1011 | \r | |
1012 | **/\r | |
1013 | BOOLEAN\r | |
1014 | Dhcp6AddrIsInCurrentIa (\r | |
1015 | IN EFI_DHCP6_IA_ADDRESS *IaAddr,\r | |
1016 | IN EFI_DHCP6_IA *CurrentIa\r | |
1017 | )\r | |
1018 | {\r | |
1019 | UINT32 Index;\r | |
1020 | \r | |
1021 | ASSERT (IaAddr != NULL && CurrentIa != NULL);\r | |
1022 | \r | |
1023 | for (Index = 0; Index < CurrentIa->IaAddressCount; Index++) {\r | |
1024 | if (EFI_IP6_EQUAL(&IaAddr->IpAddress, &CurrentIa->IaAddress[Index].IpAddress)) {\r | |
1025 | return TRUE;\r | |
1026 | }\r | |
1027 | }\r | |
1028 | return FALSE;\r | |
1029 | }\r | |
1030 | \r | |
1031 | /**\r | |
1032 | Parse the address option and update the address infomation.\r | |
1033 | \r | |
1034 | @param[in] CurrentIa The pointer to the Ia Address in control blcok.\r | |
1035 | @param[in] IaInnerOpt The pointer to the buffer.\r | |
1036 | @param[in] IaInnerLen The length to parse.\r | |
1037 | @param[out] AddrNum The number of addresses.\r | |
1038 | @param[in, out] AddrBuf The pointer to the address buffer.\r | |
1039 | \r | |
1040 | **/\r | |
1041 | VOID\r | |
1042 | Dhcp6ParseAddrOption (\r | |
1043 | IN EFI_DHCP6_IA *CurrentIa,\r | |
1044 | IN UINT8 *IaInnerOpt,\r | |
1045 | IN UINT16 IaInnerLen,\r | |
1046 | OUT UINT32 *AddrNum,\r | |
1047 | IN OUT EFI_DHCP6_IA_ADDRESS *AddrBuf\r | |
1048 | )\r | |
1049 | {\r | |
1050 | UINT8 *Cursor;\r | |
1051 | UINT16 DataLen;\r | |
1052 | UINT16 OpCode;\r | |
1053 | UINT32 ValidLt;\r | |
1054 | UINT32 PreferredLt;\r | |
1055 | EFI_DHCP6_IA_ADDRESS *IaAddr;\r | |
1056 | \r | |
1057 | //\r | |
1058 | // The format of the IA Address option:\r | |
1059 | //\r | |
1060 | // 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 | |
1061 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
1062 | // | OPTION_IAADDR | option-len |\r | |
1063 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
1064 | // | |\r | |
1065 | // | IPv6 address |\r | |
1066 | // | |\r | |
1067 | // | |\r | |
1068 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
1069 | // | preferred-lifetime |\r | |
1070 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
1071 | // | valid-lifetime |\r | |
1072 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
1073 | // . .\r | |
1074 | // . IAaddr-options .\r | |
1075 | // . .\r | |
1076 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
1077 | //\r | |
1078 | \r | |
1079 | //\r | |
1080 | // Two usage model:\r | |
1081 | //\r | |
1082 | // 1. Pass addrbuf == null, to get the addrnum over the Ia inner options.\r | |
1083 | // 2. Pass addrbuf != null, to resolve the addresses over the Ia inner\r | |
1084 | // options to the addrbuf.\r | |
1085 | //\r | |
1086 | \r | |
1087 | Cursor = IaInnerOpt;\r | |
1088 | *AddrNum = 0;\r | |
1089 | \r | |
1090 | while (Cursor < IaInnerOpt + IaInnerLen) {\r | |
1091 | //\r | |
1092 | // Refer to RFC3315 Chapter 18.1.8, we need to update lifetimes for any addresses in the IA option\r | |
1093 | // that the client already has recorded in the IA, and discard the Ia address option with 0 valid time.\r | |
1094 | //\r | |
1095 | OpCode = ReadUnaligned16 ((UINT16 *) Cursor);\r | |
1096 | PreferredLt = NTOHL (ReadUnaligned32 ((UINT32 *) (Cursor + 20)));\r | |
1097 | ValidLt = NTOHL (ReadUnaligned32 ((UINT32 *) (Cursor + 24)));\r | |
1098 | IaAddr = (EFI_DHCP6_IA_ADDRESS *) (Cursor + 4);\r | |
1099 | if (OpCode == HTONS (Dhcp6OptIaAddr) && ValidLt >= PreferredLt &&\r | |
1100 | (Dhcp6AddrIsInCurrentIa(IaAddr, CurrentIa) || ValidLt !=0)) {\r | |
1101 | if (AddrBuf != NULL) {\r | |
1102 | CopyMem (AddrBuf, IaAddr, sizeof (EFI_DHCP6_IA_ADDRESS));\r | |
1103 | AddrBuf->PreferredLifetime = PreferredLt;\r | |
1104 | AddrBuf->ValidLifetime = ValidLt;\r | |
1105 | AddrBuf = (EFI_DHCP6_IA_ADDRESS *) ((UINT8 *) AddrBuf + sizeof (EFI_DHCP6_IA_ADDRESS));\r | |
1106 | }\r | |
1107 | (*AddrNum)++;\r | |
1108 | }\r | |
1109 | DataLen = NTOHS (ReadUnaligned16 ((UINT16 *) (Cursor + 2)));\r | |
1110 | Cursor += (DataLen + 4);\r | |
1111 | }\r | |
1112 | }\r | |
1113 | \r | |
1114 | \r | |
1115 | /**\r | |
1116 | Create a control blcok for the Ia according to the corresponding options.\r | |
1117 | \r | |
1118 | @param[in] Instance The pointer to DHCP6 Instance.\r | |
1119 | @param[in] IaInnerOpt The pointer to the inner options in the Ia option.\r | |
1120 | @param[in] IaInnerLen The length of all the inner options in the Ia option.\r | |
1121 | @param[in] T1 T1 time in the Ia option.\r | |
1122 | @param[in] T2 T2 time in the Ia option.\r | |
1123 | \r | |
1124 | @retval EFI_NOT_FOUND No valid IA option is found.\r | |
1125 | @retval EFI_SUCCESS Create an IA control block successfully.\r | |
1126 | @retval EFI_OUT_OF_RESOURCES Required system resources could not be allocated.\r | |
1127 | @retval EFI_DEVICE_ERROR An unexpected error.\r | |
1128 | \r | |
1129 | **/\r | |
1130 | EFI_STATUS\r | |
1131 | Dhcp6GenerateIaCb (\r | |
1132 | IN DHCP6_INSTANCE *Instance,\r | |
1133 | IN UINT8 *IaInnerOpt,\r | |
1134 | IN UINT16 IaInnerLen,\r | |
1135 | IN UINT32 T1,\r | |
1136 | IN UINT32 T2\r | |
1137 | )\r | |
1138 | {\r | |
1139 | UINT32 AddrNum;\r | |
1140 | UINT32 IaSize;\r | |
1141 | EFI_DHCP6_IA *Ia;\r | |
1142 | \r | |
1143 | if (Instance->IaCb.Ia == NULL) {\r | |
1144 | return EFI_DEVICE_ERROR;\r | |
1145 | }\r | |
1146 | \r | |
1147 | //\r | |
1148 | // Calculate the number of addresses for this Ia, excluding the addresses with\r | |
1149 | // the value 0 of valid lifetime.\r | |
1150 | //\r | |
1151 | Dhcp6ParseAddrOption (Instance->IaCb.Ia, IaInnerOpt, IaInnerLen, &AddrNum, NULL);\r | |
1152 | \r | |
1153 | if (AddrNum == 0) {\r | |
1154 | return EFI_NOT_FOUND;\r | |
1155 | }\r | |
1156 | \r | |
1157 | //\r | |
1158 | // Allocate for new IA.\r | |
1159 | //\r | |
1160 | IaSize = sizeof (EFI_DHCP6_IA) + (AddrNum - 1) * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
1161 | Ia = AllocateZeroPool (IaSize);\r | |
1162 | \r | |
1163 | if (Ia == NULL) {\r | |
1164 | return EFI_OUT_OF_RESOURCES;\r | |
1165 | }\r | |
1166 | \r | |
1167 | //\r | |
1168 | // Fill up this new IA fields.\r | |
1169 | //\r | |
1170 | Ia->State = Instance->IaCb.Ia->State;\r | |
1171 | Ia->IaAddressCount = AddrNum;\r | |
1172 | CopyMem (&Ia->Descriptor, &Instance->Config->IaDescriptor, sizeof (EFI_DHCP6_IA_DESCRIPTOR));\r | |
1173 | Dhcp6ParseAddrOption (Instance->IaCb.Ia, IaInnerOpt, IaInnerLen, &AddrNum, Ia->IaAddress);\r | |
1174 | \r | |
1175 | //\r | |
1176 | // Free original IA resource.\r | |
1177 | //\r | |
1178 | if (Instance->IaCb.Ia->ReplyPacket != NULL) {\r | |
1179 | FreePool (Instance->IaCb.Ia->ReplyPacket);\r | |
1180 | }\r | |
1181 | FreePool (Instance->IaCb.Ia);\r | |
1182 | \r | |
1183 | \r | |
1184 | ZeroMem (&Instance->IaCb, sizeof (DHCP6_IA_CB));\r | |
1185 | \r | |
1186 | //\r | |
1187 | // Update IaCb to use new IA.\r | |
1188 | //\r | |
1189 | Instance->IaCb.Ia = Ia;\r | |
1190 | \r | |
1191 | //\r | |
1192 | \r | |
1193 | // Fill in IaCb fields. Such as T1, T2, AllExpireTime and LeaseTime.\r | |
1194 | //\r | |
1195 | Instance->IaCb.T1 = T1;\r | |
1196 | Instance->IaCb.T2 = T2;\r | |
1197 | Dhcp6CalculateLeaseTime (&Instance->IaCb);\r | |
1198 | \r | |
1199 | return EFI_SUCCESS;\r | |
1200 | }\r | |
1201 | \r | |
1202 | \r | |
1203 | /**\r | |
1204 | Cache the current IA configuration information.\r | |
1205 | \r | |
1206 | @param[in] Instance The pointer to DHCP6 Instance.\r | |
1207 | \r | |
1208 | @retval EFI_SUCCESS Cache the current IA successfully.\r | |
1209 | @retval EFI_OUT_OF_RESOURCES Required system resources could not be allocated.\r | |
1210 | \r | |
1211 | **/\r | |
1212 | EFI_STATUS\r | |
1213 | Dhcp6CacheIa (\r | |
1214 | IN DHCP6_INSTANCE *Instance\r | |
1215 | )\r | |
1216 | {\r | |
1217 | UINTN IaSize;\r | |
1218 | EFI_DHCP6_IA *Ia;\r | |
1219 | \r | |
1220 | Ia = Instance->IaCb.Ia;\r | |
1221 | \r | |
1222 | if ((Instance->CacheIa == NULL) && (Ia != NULL)) {\r | |
1223 | //\r | |
1224 | // Cache the current IA.\r | |
1225 | //\r | |
1226 | IaSize = sizeof (EFI_DHCP6_IA) + (Ia->IaAddressCount - 1) * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
1227 | \r | |
1228 | Instance->CacheIa = AllocateZeroPool (IaSize);\r | |
1229 | if (Instance->CacheIa == NULL) {\r | |
1230 | return EFI_OUT_OF_RESOURCES;\r | |
1231 | }\r | |
1232 | CopyMem (Instance->CacheIa, Ia, IaSize);\r | |
1233 | }\r | |
1234 | return EFI_SUCCESS;\r | |
1235 | }\r | |
1236 | \r | |
1237 | /**\r | |
1238 | Append CacheIa to the currrent IA. Meanwhile, clear CacheIa.ValidLifetime to 0.\r | |
1239 | \r | |
1240 | @param[in] Instance The pointer to DHCP6 instance.\r | |
1241 | \r | |
1242 | **/\r | |
1243 | VOID\r | |
1244 | Dhcp6AppendCacheIa (\r | |
1245 | IN DHCP6_INSTANCE *Instance\r | |
1246 | )\r | |
1247 | {\r | |
1248 | UINT8 *Ptr;\r | |
1249 | UINTN Index;\r | |
1250 | UINTN IaSize;\r | |
1251 | UINTN NewIaSize;\r | |
1252 | EFI_DHCP6_IA *Ia;\r | |
1253 | EFI_DHCP6_IA *NewIa;\r | |
1254 | EFI_DHCP6_IA *CacheIa;\r | |
1255 | \r | |
1256 | Ia = Instance->IaCb.Ia;\r | |
1257 | CacheIa = Instance->CacheIa;\r | |
1258 | \r | |
1259 | if ((CacheIa != NULL) && (CacheIa->IaAddressCount != 0)) {\r | |
1260 | //\r | |
1261 | // There are old addresses existing. Merge with current addresses.\r | |
1262 | //\r | |
1263 | NewIaSize = sizeof (EFI_DHCP6_IA) + (Ia->IaAddressCount + CacheIa->IaAddressCount - 1) * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
1264 | NewIa = AllocateZeroPool (NewIaSize);\r | |
1265 | if (NewIa == NULL) {\r | |
1266 | return;\r | |
1267 | }\r | |
1268 | \r | |
1269 | IaSize = sizeof (EFI_DHCP6_IA) + (Ia->IaAddressCount - 1) * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
1270 | CopyMem (NewIa, Ia, IaSize);\r | |
1271 | \r | |
1272 | //\r | |
1273 | // Clear old address.ValidLifetime\r | |
1274 | //\r | |
1275 | for (Index = 0; Index < CacheIa->IaAddressCount; Index++) {\r | |
1276 | CacheIa->IaAddress[Index].ValidLifetime = 0;\r | |
1277 | }\r | |
1278 | \r | |
1279 | NewIa->IaAddressCount += CacheIa->IaAddressCount;\r | |
1280 | Ptr = (UINT8*)&NewIa->IaAddress[Ia->IaAddressCount];\r | |
1281 | CopyMem (Ptr, CacheIa->IaAddress, CacheIa->IaAddressCount * sizeof (EFI_DHCP6_IA_ADDRESS));\r | |
1282 | \r | |
1283 | //\r | |
1284 | // Migrate to the NewIa and free previous.\r | |
1285 | //\r | |
1286 | FreePool (Instance->CacheIa);\r | |
1287 | FreePool (Instance->IaCb.Ia);\r | |
1288 | Instance->CacheIa = NULL;\r | |
1289 | Instance->IaCb.Ia = NewIa;\r | |
1290 | }\r | |
1291 | }\r | |
1292 | \r | |
1293 | /**\r | |
1294 | Calculate the Dhcp6 get mapping timeout by adding additinal delay to the IP6 DAD transmits count.\r | |
1295 | \r | |
1296 | @param[in] Ip6Cfg The pointer to Ip6 config protocol.\r | |
1297 | @param[out] TimeOut The time out value in 100ns units.\r | |
1298 | \r | |
1299 | @retval EFI_INVALID_PARAMETER Input parameters are invalid.\r | |
1300 | @retval EFI_SUCCESS Calculate the time out value successfully.\r | |
1301 | **/\r | |
1302 | EFI_STATUS\r | |
1303 | Dhcp6GetMappingTimeOut (\r | |
1304 | IN EFI_IP6_CONFIG_PROTOCOL *Ip6Cfg,\r | |
1305 | OUT UINTN *TimeOut\r | |
1306 | ) \r | |
1307 | {\r | |
1308 | EFI_STATUS Status;\r | |
1309 | UINTN DataSize;\r | |
1310 | EFI_IP6_CONFIG_DUP_ADDR_DETECT_TRANSMITS DadXmits;\r | |
1311 | \r | |
1312 | if (Ip6Cfg == NULL || TimeOut == NULL) {\r | |
1313 | return EFI_INVALID_PARAMETER;\r | |
1314 | }\r | |
1315 | \r | |
1316 | DataSize = sizeof (EFI_IP6_CONFIG_DUP_ADDR_DETECT_TRANSMITS);\r | |
1317 | Status = Ip6Cfg->GetData (\r | |
1318 | Ip6Cfg,\r | |
1319 | Ip6ConfigDataTypeDupAddrDetectTransmits,\r | |
1320 | &DataSize,\r | |
1321 | &DadXmits\r | |
1322 | );\r | |
1323 | if (EFI_ERROR (Status)) {\r | |
1324 | return Status;\r | |
1325 | }\r | |
1326 | \r | |
1327 | *TimeOut = TICKS_PER_SECOND * DadXmits.DupAddrDetectTransmits + DHCP6_DAD_ADDITIONAL_DELAY;\r | |
1328 | \r | |
1329 | return EFI_SUCCESS;\r | |
1330 | }\r |