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1 | /** @file\r | |
2 | IP6 internal functions to process the incoming packets.\r | |
3 | \r | |
4 | Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>\r | |
5 | (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>\r | |
6 | \r | |
7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
8 | \r | |
9 | **/\r | |
10 | \r | |
11 | #include "Ip6Impl.h"\r | |
12 | \r | |
13 | /**\r | |
14 | Create an empty assemble entry for the packet identified by\r | |
15 | (Dst, Src, Id). The default life for the packet is 60 seconds.\r | |
16 | \r | |
17 | @param[in] Dst The destination address.\r | |
18 | @param[in] Src The source address.\r | |
19 | @param[in] Id The ID field in the IP header.\r | |
20 | \r | |
21 | @return NULL if failed to allocate memory for the entry. Otherwise,\r | |
22 | the pointer to the just created reassemble entry.\r | |
23 | \r | |
24 | **/\r | |
25 | IP6_ASSEMBLE_ENTRY *\r | |
26 | Ip6CreateAssembleEntry (\r | |
27 | IN EFI_IPv6_ADDRESS *Dst,\r | |
28 | IN EFI_IPv6_ADDRESS *Src,\r | |
29 | IN UINT32 Id\r | |
30 | )\r | |
31 | {\r | |
32 | IP6_ASSEMBLE_ENTRY *Assemble;\r | |
33 | \r | |
34 | Assemble = AllocatePool (sizeof (IP6_ASSEMBLE_ENTRY));\r | |
35 | if (Assemble == NULL) {\r | |
36 | return NULL;\r | |
37 | }\r | |
38 | \r | |
39 | IP6_COPY_ADDRESS (&Assemble->Dst, Dst);\r | |
40 | IP6_COPY_ADDRESS (&Assemble->Src, Src);\r | |
41 | InitializeListHead (&Assemble->Fragments);\r | |
42 | \r | |
43 | Assemble->Id = Id;\r | |
44 | Assemble->Life = IP6_FRAGMENT_LIFE + 1;\r | |
45 | \r | |
46 | Assemble->TotalLen = 0;\r | |
47 | Assemble->CurLen = 0;\r | |
48 | Assemble->Head = NULL;\r | |
49 | Assemble->Info = NULL;\r | |
50 | Assemble->Packet = NULL;\r | |
51 | \r | |
52 | return Assemble;\r | |
53 | }\r | |
54 | \r | |
55 | /**\r | |
56 | Release all the fragments of a packet, then free the assemble entry.\r | |
57 | \r | |
58 | @param[in] Assemble The assemble entry to free.\r | |
59 | \r | |
60 | **/\r | |
61 | VOID\r | |
62 | Ip6FreeAssembleEntry (\r | |
63 | IN IP6_ASSEMBLE_ENTRY *Assemble\r | |
64 | )\r | |
65 | {\r | |
66 | LIST_ENTRY *Entry;\r | |
67 | LIST_ENTRY *Next;\r | |
68 | NET_BUF *Fragment;\r | |
69 | \r | |
70 | NET_LIST_FOR_EACH_SAFE (Entry, Next, &Assemble->Fragments) {\r | |
71 | Fragment = NET_LIST_USER_STRUCT (Entry, NET_BUF, List);\r | |
72 | \r | |
73 | RemoveEntryList (Entry);\r | |
74 | NetbufFree (Fragment);\r | |
75 | }\r | |
76 | \r | |
77 | if (Assemble->Packet != NULL) {\r | |
78 | NetbufFree (Assemble->Packet);\r | |
79 | }\r | |
80 | \r | |
81 | FreePool (Assemble);\r | |
82 | }\r | |
83 | \r | |
84 | /**\r | |
85 | Release all the fragments of the packet. This is the callback for\r | |
86 | the assembled packet's OnFree. It will free the assemble entry,\r | |
87 | which in turn frees all the fragments of the packet.\r | |
88 | \r | |
89 | @param[in] Arg The assemble entry to free.\r | |
90 | \r | |
91 | **/\r | |
92 | VOID\r | |
93 | EFIAPI\r | |
94 | Ip6OnFreeFragments (\r | |
95 | IN VOID *Arg\r | |
96 | )\r | |
97 | {\r | |
98 | Ip6FreeAssembleEntry ((IP6_ASSEMBLE_ENTRY *)Arg);\r | |
99 | }\r | |
100 | \r | |
101 | /**\r | |
102 | Trim the packet to fit in [Start, End), and update per the\r | |
103 | packet information.\r | |
104 | \r | |
105 | @param[in, out] Packet Packet to trim.\r | |
106 | @param[in] Start The sequence of the first byte to fit in.\r | |
107 | @param[in] End One beyond the sequence of last byte to fit in.\r | |
108 | \r | |
109 | **/\r | |
110 | VOID\r | |
111 | Ip6TrimPacket (\r | |
112 | IN OUT NET_BUF *Packet,\r | |
113 | IN INTN Start,\r | |
114 | IN INTN End\r | |
115 | )\r | |
116 | {\r | |
117 | IP6_CLIP_INFO *Info;\r | |
118 | INTN Len;\r | |
119 | \r | |
120 | Info = IP6_GET_CLIP_INFO (Packet);\r | |
121 | \r | |
122 | ASSERT (Info->Start + Info->Length == Info->End);\r | |
123 | ASSERT ((Info->Start < End) && (Start < Info->End));\r | |
124 | \r | |
125 | if (Info->Start < Start) {\r | |
126 | Len = Start - Info->Start;\r | |
127 | \r | |
128 | NetbufTrim (Packet, (UINT32)Len, NET_BUF_HEAD);\r | |
129 | Info->Start = (UINT32)Start;\r | |
130 | Info->Length -= (UINT32)Len;\r | |
131 | }\r | |
132 | \r | |
133 | if (End < Info->End) {\r | |
134 | Len = End - Info->End;\r | |
135 | \r | |
136 | NetbufTrim (Packet, (UINT32)Len, NET_BUF_TAIL);\r | |
137 | Info->End = (UINT32)End;\r | |
138 | Info->Length -= (UINT32)Len;\r | |
139 | }\r | |
140 | }\r | |
141 | \r | |
142 | /**\r | |
143 | Reassemble the IP fragments. If all the fragments of the packet\r | |
144 | have been received, it will wrap the packet in a net buffer then\r | |
145 | return it to caller. If the packet can't be assembled, NULL is\r | |
146 | returned.\r | |
147 | \r | |
148 | @param[in, out] Table The assemble table used. A new assemble entry will be created\r | |
149 | if the Packet is from a new chain of fragments.\r | |
150 | @param[in] Packet The fragment to assemble. It might be freed if the fragment\r | |
151 | can't be re-assembled.\r | |
152 | \r | |
153 | @return NULL if the packet can't be reassembled. The pointer to the just assembled\r | |
154 | packet if all the fragments of the packet have arrived.\r | |
155 | \r | |
156 | **/\r | |
157 | NET_BUF *\r | |
158 | Ip6Reassemble (\r | |
159 | IN OUT IP6_ASSEMBLE_TABLE *Table,\r | |
160 | IN NET_BUF *Packet\r | |
161 | )\r | |
162 | {\r | |
163 | EFI_IP6_HEADER *Head;\r | |
164 | IP6_CLIP_INFO *This;\r | |
165 | IP6_CLIP_INFO *Node;\r | |
166 | IP6_ASSEMBLE_ENTRY *Assemble;\r | |
167 | IP6_ASSEMBLE_ENTRY *Entry;\r | |
168 | LIST_ENTRY *ListHead;\r | |
169 | LIST_ENTRY *Prev;\r | |
170 | LIST_ENTRY *Cur;\r | |
171 | NET_BUF *Fragment;\r | |
172 | NET_BUF *TmpPacket;\r | |
173 | NET_BUF *NewPacket;\r | |
174 | NET_BUF *Duplicate;\r | |
175 | UINT8 *DupHead;\r | |
176 | INTN Index;\r | |
177 | UINT16 UnFragmentLen;\r | |
178 | UINT8 *NextHeader;\r | |
179 | \r | |
180 | Head = Packet->Ip.Ip6;\r | |
181 | This = IP6_GET_CLIP_INFO (Packet);\r | |
182 | \r | |
183 | ASSERT (Head != NULL);\r | |
184 | \r | |
185 | //\r | |
186 | // Find the corresponding assemble entry by (Dst, Src, Id)\r | |
187 | //\r | |
188 | Assemble = NULL;\r | |
189 | Index = IP6_ASSEMBLE_HASH (&Head->DestinationAddress, &Head->SourceAddress, This->Id);\r | |
190 | \r | |
191 | NET_LIST_FOR_EACH (Cur, &Table->Bucket[Index]) {\r | |
192 | Entry = NET_LIST_USER_STRUCT (Cur, IP6_ASSEMBLE_ENTRY, Link);\r | |
193 | \r | |
194 | if ((Entry->Id == This->Id) &&\r | |
195 | EFI_IP6_EQUAL (&Entry->Src, &Head->SourceAddress) &&\r | |
196 | EFI_IP6_EQUAL (&Entry->Dst, &Head->DestinationAddress)\r | |
197 | )\r | |
198 | {\r | |
199 | Assemble = Entry;\r | |
200 | break;\r | |
201 | }\r | |
202 | }\r | |
203 | \r | |
204 | //\r | |
205 | // Create a new entry if can not find an existing one, insert it to assemble table\r | |
206 | //\r | |
207 | if (Assemble == NULL) {\r | |
208 | Assemble = Ip6CreateAssembleEntry (\r | |
209 | &Head->DestinationAddress,\r | |
210 | &Head->SourceAddress,\r | |
211 | This->Id\r | |
212 | );\r | |
213 | \r | |
214 | if (Assemble == NULL) {\r | |
215 | goto Error;\r | |
216 | }\r | |
217 | \r | |
218 | InsertHeadList (&Table->Bucket[Index], &Assemble->Link);\r | |
219 | }\r | |
220 | \r | |
221 | //\r | |
222 | // Find the point to insert the packet: before the first\r | |
223 | // fragment with THIS.Start < CUR.Start. the previous one\r | |
224 | // has PREV.Start <= THIS.Start < CUR.Start.\r | |
225 | //\r | |
226 | ListHead = &Assemble->Fragments;\r | |
227 | \r | |
228 | NET_LIST_FOR_EACH (Cur, ListHead) {\r | |
229 | Fragment = NET_LIST_USER_STRUCT (Cur, NET_BUF, List);\r | |
230 | \r | |
231 | if (This->Start < IP6_GET_CLIP_INFO (Fragment)->Start) {\r | |
232 | break;\r | |
233 | }\r | |
234 | }\r | |
235 | \r | |
236 | //\r | |
237 | // Check whether the current fragment overlaps with the previous one.\r | |
238 | // It holds that: PREV.Start <= THIS.Start < THIS.End. Only need to\r | |
239 | // check whether THIS.Start < PREV.End for overlap. If two fragments\r | |
240 | // overlaps, trim the overlapped part off THIS fragment.\r | |
241 | //\r | |
242 | if ((Prev = Cur->BackLink) != ListHead) {\r | |
243 | Fragment = NET_LIST_USER_STRUCT (Prev, NET_BUF, List);\r | |
244 | Node = IP6_GET_CLIP_INFO (Fragment);\r | |
245 | \r | |
246 | if (This->Start < Node->End) {\r | |
247 | if (This->End <= Node->End) {\r | |
248 | goto Error;\r | |
249 | }\r | |
250 | \r | |
251 | //\r | |
252 | // Trim the previous fragment from tail.\r | |
253 | //\r | |
254 | Ip6TrimPacket (Fragment, Node->Start, This->Start);\r | |
255 | }\r | |
256 | }\r | |
257 | \r | |
258 | //\r | |
259 | // Insert the fragment into the packet. The fragment may be removed\r | |
260 | // from the list by the following checks.\r | |
261 | //\r | |
262 | NetListInsertBefore (Cur, &Packet->List);\r | |
263 | \r | |
264 | //\r | |
265 | // Check the packets after the insert point. It holds that:\r | |
266 | // THIS.Start <= NODE.Start < NODE.End. The equality holds\r | |
267 | // if PREV and NEXT are continuous. THIS fragment may fill\r | |
268 | // several holes. Remove the completely overlapped fragments\r | |
269 | //\r | |
270 | while (Cur != ListHead) {\r | |
271 | Fragment = NET_LIST_USER_STRUCT (Cur, NET_BUF, List);\r | |
272 | Node = IP6_GET_CLIP_INFO (Fragment);\r | |
273 | \r | |
274 | //\r | |
275 | // Remove fragments completely overlapped by this fragment\r | |
276 | //\r | |
277 | if (Node->End <= This->End) {\r | |
278 | Cur = Cur->ForwardLink;\r | |
279 | \r | |
280 | RemoveEntryList (&Fragment->List);\r | |
281 | Assemble->CurLen -= Node->Length;\r | |
282 | \r | |
283 | NetbufFree (Fragment);\r | |
284 | continue;\r | |
285 | }\r | |
286 | \r | |
287 | //\r | |
288 | // The conditions are: THIS.Start <= NODE.Start, and THIS.End <\r | |
289 | // NODE.End. Two fragments overlaps if NODE.Start < THIS.End.\r | |
290 | // If two fragments start at the same offset, remove THIS fragment\r | |
291 | // because ((THIS.Start == NODE.Start) && (THIS.End < NODE.End)).\r | |
292 | //\r | |
293 | if (Node->Start < This->End) {\r | |
294 | if (This->Start == Node->Start) {\r | |
295 | RemoveEntryList (&Packet->List);\r | |
296 | goto Error;\r | |
297 | }\r | |
298 | \r | |
299 | Ip6TrimPacket (Packet, This->Start, Node->Start);\r | |
300 | }\r | |
301 | \r | |
302 | break;\r | |
303 | }\r | |
304 | \r | |
305 | //\r | |
306 | // Update the assemble info: increase the current length. If it is\r | |
307 | // the frist fragment, update the packet's IP head and per packet\r | |
308 | // info. If it is the last fragment, update the total length.\r | |
309 | //\r | |
310 | Assemble->CurLen += This->Length;\r | |
311 | \r | |
312 | if (This->Start == 0) {\r | |
313 | //\r | |
314 | // Once the first fragment is enqueued, it can't be removed\r | |
315 | // from the fragment list. So, Assemble->Head always point\r | |
316 | // to valid memory area.\r | |
317 | //\r | |
318 | if ((Assemble->Head != NULL) || (Assemble->Packet != NULL)) {\r | |
319 | goto Error;\r | |
320 | }\r | |
321 | \r | |
322 | //\r | |
323 | // Backup the first fragment in case the reassembly of that packet fail.\r | |
324 | //\r | |
325 | Duplicate = NetbufDuplicate (Packet, NULL, sizeof (EFI_IP6_HEADER));\r | |
326 | if (Duplicate == NULL) {\r | |
327 | goto Error;\r | |
328 | }\r | |
329 | \r | |
330 | //\r | |
331 | // Revert IP head to network order.\r | |
332 | //\r | |
333 | DupHead = NetbufGetByte (Duplicate, 0, NULL);\r | |
334 | ASSERT (DupHead != NULL);\r | |
335 | Duplicate->Ip.Ip6 = Ip6NtohHead ((EFI_IP6_HEADER *)DupHead);\r | |
336 | Assemble->Packet = Duplicate;\r | |
337 | \r | |
338 | //\r | |
339 | // Adjust the unfragmentable part in first fragment\r | |
340 | //\r | |
341 | UnFragmentLen = (UINT16)(This->HeadLen - sizeof (EFI_IP6_HEADER));\r | |
342 | if (UnFragmentLen == 0) {\r | |
343 | //\r | |
344 | // There is not any unfragmentable extension header.\r | |
345 | //\r | |
346 | ASSERT (Head->NextHeader == IP6_FRAGMENT);\r | |
347 | Head->NextHeader = This->NextHeader;\r | |
348 | } else {\r | |
349 | NextHeader = NetbufGetByte (\r | |
350 | Packet,\r | |
351 | This->FormerNextHeader + sizeof (EFI_IP6_HEADER),\r | |
352 | 0\r | |
353 | );\r | |
354 | if (NextHeader == NULL) {\r | |
355 | goto Error;\r | |
356 | }\r | |
357 | \r | |
358 | *NextHeader = This->NextHeader;\r | |
359 | }\r | |
360 | \r | |
361 | Assemble->Head = Head;\r | |
362 | Assemble->Info = IP6_GET_CLIP_INFO (Packet);\r | |
363 | }\r | |
364 | \r | |
365 | //\r | |
366 | // Don't update the length more than once.\r | |
367 | //\r | |
368 | if ((This->LastFrag != 0) && (Assemble->TotalLen == 0)) {\r | |
369 | Assemble->TotalLen = This->End;\r | |
370 | }\r | |
371 | \r | |
372 | //\r | |
373 | // Deliver the whole packet if all the fragments received.\r | |
374 | // All fragments received if:\r | |
375 | // 1. received the last one, so, the total length is known\r | |
376 | // 2. received all the data. If the last fragment on the\r | |
377 | // queue ends at the total length, all data is received.\r | |
378 | //\r | |
379 | if ((Assemble->TotalLen != 0) && (Assemble->CurLen >= Assemble->TotalLen)) {\r | |
380 | RemoveEntryList (&Assemble->Link);\r | |
381 | \r | |
382 | //\r | |
383 | // If the packet is properly formatted, the last fragment's End\r | |
384 | // equals to the packet's total length. Otherwise, the packet\r | |
385 | // is a fake, drop it now.\r | |
386 | //\r | |
387 | Fragment = NET_LIST_USER_STRUCT (ListHead->BackLink, NET_BUF, List);\r | |
388 | if (IP6_GET_CLIP_INFO (Fragment)->End != (INTN)Assemble->TotalLen) {\r | |
389 | Ip6FreeAssembleEntry (Assemble);\r | |
390 | goto Error;\r | |
391 | }\r | |
392 | \r | |
393 | Fragment = NET_LIST_HEAD (ListHead, NET_BUF, List);\r | |
394 | This = Assemble->Info;\r | |
395 | \r | |
396 | //\r | |
397 | // This TmpPacket is used to hold the unfragmentable part, i.e.,\r | |
398 | // the IPv6 header and the unfragmentable extension headers. Be noted that\r | |
399 | // the Fragment Header is excluded.\r | |
400 | //\r | |
401 | TmpPacket = NetbufGetFragment (Fragment, 0, This->HeadLen, 0);\r | |
402 | ASSERT (TmpPacket != NULL);\r | |
403 | \r | |
404 | NET_LIST_FOR_EACH (Cur, ListHead) {\r | |
405 | //\r | |
406 | // Trim off the unfragment part plus the fragment header from all fragments.\r | |
407 | //\r | |
408 | Fragment = NET_LIST_USER_STRUCT (Cur, NET_BUF, List);\r | |
409 | NetbufTrim (Fragment, This->HeadLen + sizeof (IP6_FRAGMENT_HEADER), TRUE);\r | |
410 | }\r | |
411 | \r | |
412 | InsertHeadList (ListHead, &TmpPacket->List);\r | |
413 | \r | |
414 | //\r | |
415 | // Wrap the packet in a net buffer then deliver it up\r | |
416 | //\r | |
417 | NewPacket = NetbufFromBufList (\r | |
418 | &Assemble->Fragments,\r | |
419 | 0,\r | |
420 | 0,\r | |
421 | Ip6OnFreeFragments,\r | |
422 | Assemble\r | |
423 | );\r | |
424 | \r | |
425 | if (NewPacket == NULL) {\r | |
426 | Ip6FreeAssembleEntry (Assemble);\r | |
427 | goto Error;\r | |
428 | }\r | |
429 | \r | |
430 | NewPacket->Ip.Ip6 = Assemble->Head;\r | |
431 | \r | |
432 | CopyMem (IP6_GET_CLIP_INFO (NewPacket), Assemble->Info, sizeof (IP6_CLIP_INFO));\r | |
433 | \r | |
434 | return NewPacket;\r | |
435 | }\r | |
436 | \r | |
437 | return NULL;\r | |
438 | \r | |
439 | Error:\r | |
440 | NetbufFree (Packet);\r | |
441 | return NULL;\r | |
442 | }\r | |
443 | \r | |
444 | /**\r | |
445 | The callback function for the net buffer that wraps the packet processed by\r | |
446 | IPsec. It releases the wrap packet and also signals IPsec to free the resources.\r | |
447 | \r | |
448 | @param[in] Arg The wrap context.\r | |
449 | \r | |
450 | **/\r | |
451 | VOID\r | |
452 | EFIAPI\r | |
453 | Ip6IpSecFree (\r | |
454 | IN VOID *Arg\r | |
455 | )\r | |
456 | {\r | |
457 | IP6_IPSEC_WRAP *Wrap;\r | |
458 | \r | |
459 | Wrap = (IP6_IPSEC_WRAP *)Arg;\r | |
460 | \r | |
461 | if (Wrap->IpSecRecycleSignal != NULL) {\r | |
462 | gBS->SignalEvent (Wrap->IpSecRecycleSignal);\r | |
463 | }\r | |
464 | \r | |
465 | NetbufFree (Wrap->Packet);\r | |
466 | \r | |
467 | FreePool (Wrap);\r | |
468 | \r | |
469 | return;\r | |
470 | }\r | |
471 | \r | |
472 | /**\r | |
473 | The work function to locate the IPsec protocol to process the inbound or\r | |
474 | outbound IP packets. The process routine handles the packet with the following\r | |
475 | actions: bypass the packet, discard the packet, or protect the packet.\r | |
476 | \r | |
477 | @param[in] IpSb The IP6 service instance.\r | |
478 | @param[in, out] Head The caller-supplied IP6 header.\r | |
479 | @param[in, out] LastHead The next header field of last IP header.\r | |
480 | @param[in, out] Netbuf The IP6 packet to be processed by IPsec.\r | |
481 | @param[in, out] ExtHdrs The caller-supplied options.\r | |
482 | @param[in, out] ExtHdrsLen The length of the option.\r | |
483 | @param[in] Direction The directionality in an SPD entry,\r | |
484 | EfiIPsecInBound, or EfiIPsecOutBound.\r | |
485 | @param[in] Context The token's wrap.\r | |
486 | \r | |
487 | @retval EFI_SUCCESS The IPsec protocol is not available or disabled.\r | |
488 | @retval EFI_SUCCESS The packet was bypassed, and all buffers remain the same.\r | |
489 | @retval EFI_SUCCESS The packet was protected.\r | |
490 | @retval EFI_ACCESS_DENIED The packet was discarded.\r | |
491 | @retval EFI_OUT_OF_RESOURCES There are not sufficient resources to complete the operation.\r | |
492 | @retval EFI_BUFFER_TOO_SMALL The number of non-empty blocks is bigger than the\r | |
493 | number of input data blocks when building a fragment table.\r | |
494 | \r | |
495 | **/\r | |
496 | EFI_STATUS\r | |
497 | Ip6IpSecProcessPacket (\r | |
498 | IN IP6_SERVICE *IpSb,\r | |
499 | IN OUT EFI_IP6_HEADER **Head,\r | |
500 | IN OUT UINT8 *LastHead,\r | |
501 | IN OUT NET_BUF **Netbuf,\r | |
502 | IN OUT UINT8 **ExtHdrs,\r | |
503 | IN OUT UINT32 *ExtHdrsLen,\r | |
504 | IN EFI_IPSEC_TRAFFIC_DIR Direction,\r | |
505 | IN VOID *Context\r | |
506 | )\r | |
507 | {\r | |
508 | NET_FRAGMENT *FragmentTable;\r | |
509 | NET_FRAGMENT *OriginalFragmentTable;\r | |
510 | UINT32 FragmentCount;\r | |
511 | UINT32 OriginalFragmentCount;\r | |
512 | EFI_EVENT RecycleEvent;\r | |
513 | NET_BUF *Packet;\r | |
514 | IP6_TXTOKEN_WRAP *TxWrap;\r | |
515 | IP6_IPSEC_WRAP *IpSecWrap;\r | |
516 | EFI_STATUS Status;\r | |
517 | EFI_IP6_HEADER *PacketHead;\r | |
518 | UINT8 *Buf;\r | |
519 | EFI_IP6_HEADER ZeroHead;\r | |
520 | \r | |
521 | Status = EFI_SUCCESS;\r | |
522 | \r | |
523 | if (!mIpSec2Installed) {\r | |
524 | goto ON_EXIT;\r | |
525 | }\r | |
526 | \r | |
527 | ASSERT (mIpSec != NULL);\r | |
528 | \r | |
529 | Packet = *Netbuf;\r | |
530 | RecycleEvent = NULL;\r | |
531 | IpSecWrap = NULL;\r | |
532 | FragmentTable = NULL;\r | |
533 | PacketHead = NULL;\r | |
534 | Buf = NULL;\r | |
535 | TxWrap = (IP6_TXTOKEN_WRAP *)Context;\r | |
536 | FragmentCount = Packet->BlockOpNum;\r | |
537 | ZeroMem (&ZeroHead, sizeof (EFI_IP6_HEADER));\r | |
538 | \r | |
539 | //\r | |
540 | // Check whether the ipsec enable variable is set.\r | |
541 | //\r | |
542 | if (mIpSec->DisabledFlag) {\r | |
543 | //\r | |
544 | // If IPsec is disabled, restore the original MTU\r | |
545 | //\r | |
546 | IpSb->MaxPacketSize = IpSb->OldMaxPacketSize;\r | |
547 | goto ON_EXIT;\r | |
548 | } else {\r | |
549 | //\r | |
550 | // If IPsec is enabled, use the MTU which reduce the IPsec header length.\r | |
551 | //\r | |
552 | IpSb->MaxPacketSize = IpSb->OldMaxPacketSize - IP6_MAX_IPSEC_HEADLEN;\r | |
553 | }\r | |
554 | \r | |
555 | //\r | |
556 | // Bypass all multicast inbound or outbound traffic.\r | |
557 | //\r | |
558 | if (IP6_IS_MULTICAST (&(*Head)->DestinationAddress) || IP6_IS_MULTICAST (&(*Head)->SourceAddress)) {\r | |
559 | goto ON_EXIT;\r | |
560 | }\r | |
561 | \r | |
562 | //\r | |
563 | // Rebuild fragment table from netbuf to ease ipsec process.\r | |
564 | //\r | |
565 | FragmentTable = AllocateZeroPool (FragmentCount * sizeof (NET_FRAGMENT));\r | |
566 | \r | |
567 | if (FragmentTable == NULL) {\r | |
568 | Status = EFI_OUT_OF_RESOURCES;\r | |
569 | goto ON_EXIT;\r | |
570 | }\r | |
571 | \r | |
572 | Status = NetbufBuildExt (Packet, FragmentTable, &FragmentCount);\r | |
573 | OriginalFragmentTable = FragmentTable;\r | |
574 | OriginalFragmentCount = FragmentCount;\r | |
575 | \r | |
576 | if (EFI_ERROR (Status)) {\r | |
577 | FreePool (FragmentTable);\r | |
578 | goto ON_EXIT;\r | |
579 | }\r | |
580 | \r | |
581 | //\r | |
582 | // Convert host byte order to network byte order\r | |
583 | //\r | |
584 | Ip6NtohHead (*Head);\r | |
585 | \r | |
586 | Status = mIpSec->ProcessExt (\r | |
587 | mIpSec,\r | |
588 | IpSb->Controller,\r | |
589 | IP_VERSION_6,\r | |
590 | (VOID *)(*Head),\r | |
591 | LastHead,\r | |
592 | (VOID **)ExtHdrs,\r | |
593 | ExtHdrsLen,\r | |
594 | (EFI_IPSEC_FRAGMENT_DATA **)(&FragmentTable),\r | |
595 | &FragmentCount,\r | |
596 | Direction,\r | |
597 | &RecycleEvent\r | |
598 | );\r | |
599 | //\r | |
600 | // Convert back to host byte order\r | |
601 | //\r | |
602 | Ip6NtohHead (*Head);\r | |
603 | \r | |
604 | if (EFI_ERROR (Status)) {\r | |
605 | FreePool (OriginalFragmentTable);\r | |
606 | goto ON_EXIT;\r | |
607 | }\r | |
608 | \r | |
609 | if ((OriginalFragmentCount == FragmentCount) && (OriginalFragmentTable == FragmentTable)) {\r | |
610 | //\r | |
611 | // For ByPass Packet\r | |
612 | //\r | |
613 | FreePool (FragmentTable);\r | |
614 | goto ON_EXIT;\r | |
615 | } else {\r | |
616 | //\r | |
617 | // Free the FragmentTable which allocated before calling the IPsec.\r | |
618 | //\r | |
619 | FreePool (OriginalFragmentTable);\r | |
620 | }\r | |
621 | \r | |
622 | if ((Direction == EfiIPsecOutBound) && (TxWrap != NULL)) {\r | |
623 | TxWrap->IpSecRecycleSignal = RecycleEvent;\r | |
624 | TxWrap->Packet = NetbufFromExt (\r | |
625 | FragmentTable,\r | |
626 | FragmentCount,\r | |
627 | IP6_MAX_HEADLEN,\r | |
628 | 0,\r | |
629 | Ip6FreeTxToken,\r | |
630 | TxWrap\r | |
631 | );\r | |
632 | if (TxWrap->Packet == NULL) {\r | |
633 | TxWrap->Packet = *Netbuf;\r | |
634 | Status = EFI_OUT_OF_RESOURCES;\r | |
635 | goto ON_EXIT;\r | |
636 | }\r | |
637 | \r | |
638 | CopyMem (\r | |
639 | IP6_GET_CLIP_INFO (TxWrap->Packet),\r | |
640 | IP6_GET_CLIP_INFO (Packet),\r | |
641 | sizeof (IP6_CLIP_INFO)\r | |
642 | );\r | |
643 | \r | |
644 | NetIpSecNetbufFree (Packet);\r | |
645 | *Netbuf = TxWrap->Packet;\r | |
646 | } else {\r | |
647 | IpSecWrap = AllocateZeroPool (sizeof (IP6_IPSEC_WRAP));\r | |
648 | \r | |
649 | if (IpSecWrap == NULL) {\r | |
650 | Status = EFI_OUT_OF_RESOURCES;\r | |
651 | gBS->SignalEvent (RecycleEvent);\r | |
652 | goto ON_EXIT;\r | |
653 | }\r | |
654 | \r | |
655 | IpSecWrap->IpSecRecycleSignal = RecycleEvent;\r | |
656 | IpSecWrap->Packet = Packet;\r | |
657 | Packet = NetbufFromExt (\r | |
658 | FragmentTable,\r | |
659 | FragmentCount,\r | |
660 | IP6_MAX_HEADLEN,\r | |
661 | 0,\r | |
662 | Ip6IpSecFree,\r | |
663 | IpSecWrap\r | |
664 | );\r | |
665 | \r | |
666 | if (Packet == NULL) {\r | |
667 | Packet = IpSecWrap->Packet;\r | |
668 | gBS->SignalEvent (RecycleEvent);\r | |
669 | FreePool (IpSecWrap);\r | |
670 | Status = EFI_OUT_OF_RESOURCES;\r | |
671 | goto ON_EXIT;\r | |
672 | }\r | |
673 | \r | |
674 | if ((Direction == EfiIPsecInBound) && (0 != CompareMem (&ZeroHead, *Head, sizeof (EFI_IP6_HEADER)))) {\r | |
675 | PacketHead = (EFI_IP6_HEADER *)NetbufAllocSpace (\r | |
676 | Packet,\r | |
677 | sizeof (EFI_IP6_HEADER) + *ExtHdrsLen,\r | |
678 | NET_BUF_HEAD\r | |
679 | );\r | |
680 | if (PacketHead == NULL) {\r | |
681 | *Netbuf = Packet;\r | |
682 | Status = EFI_OUT_OF_RESOURCES;\r | |
683 | goto ON_EXIT;\r | |
684 | }\r | |
685 | \r | |
686 | CopyMem (PacketHead, *Head, sizeof (EFI_IP6_HEADER));\r | |
687 | *Head = PacketHead;\r | |
688 | Packet->Ip.Ip6 = PacketHead;\r | |
689 | \r | |
690 | if (*ExtHdrs != NULL) {\r | |
691 | Buf = (UINT8 *)(PacketHead + 1);\r | |
692 | CopyMem (Buf, *ExtHdrs, *ExtHdrsLen);\r | |
693 | }\r | |
694 | \r | |
695 | NetbufTrim (Packet, sizeof (EFI_IP6_HEADER) + *ExtHdrsLen, TRUE);\r | |
696 | CopyMem (\r | |
697 | IP6_GET_CLIP_INFO (Packet),\r | |
698 | IP6_GET_CLIP_INFO (IpSecWrap->Packet),\r | |
699 | sizeof (IP6_CLIP_INFO)\r | |
700 | );\r | |
701 | }\r | |
702 | \r | |
703 | *Netbuf = Packet;\r | |
704 | }\r | |
705 | \r | |
706 | ON_EXIT:\r | |
707 | return Status;\r | |
708 | }\r | |
709 | \r | |
710 | /**\r | |
711 | Pre-process the IPv6 packet. First validates the IPv6 packet, and\r | |
712 | then reassembles packet if it is necessary.\r | |
713 | \r | |
714 | @param[in] IpSb The IP6 service instance.\r | |
715 | @param[in, out] Packet The received IP6 packet to be processed.\r | |
716 | @param[in] Flag The link layer flag for the packet received, such\r | |
717 | as multicast.\r | |
718 | @param[out] Payload The pointer to the payload of the received packet.\r | |
719 | it starts from the first byte of the extension header.\r | |
720 | @param[out] LastHead The pointer of NextHeader of the last extension\r | |
721 | header processed by IP6.\r | |
722 | @param[out] ExtHdrsLen The length of the whole option.\r | |
723 | @param[out] UnFragmentLen The length of unfragmented length of extension headers.\r | |
724 | @param[out] Fragmented Indicate whether the packet is fragmented.\r | |
725 | @param[out] Head The pointer to the EFI_IP6_Header.\r | |
726 | \r | |
727 | @retval EFI_SUCCESS The received packet is well format.\r | |
728 | @retval EFI_INVALID_PARAMETER The received packet is malformed.\r | |
729 | \r | |
730 | **/\r | |
731 | EFI_STATUS\r | |
732 | Ip6PreProcessPacket (\r | |
733 | IN IP6_SERVICE *IpSb,\r | |
734 | IN OUT NET_BUF **Packet,\r | |
735 | IN UINT32 Flag,\r | |
736 | OUT UINT8 **Payload,\r | |
737 | OUT UINT8 **LastHead,\r | |
738 | OUT UINT32 *ExtHdrsLen,\r | |
739 | OUT UINT32 *UnFragmentLen,\r | |
740 | OUT BOOLEAN *Fragmented,\r | |
741 | OUT EFI_IP6_HEADER **Head\r | |
742 | )\r | |
743 | {\r | |
744 | UINT16 PayloadLen;\r | |
745 | UINT16 TotalLen;\r | |
746 | UINT32 FormerHeadOffset;\r | |
747 | UINT32 HeadLen;\r | |
748 | IP6_FRAGMENT_HEADER *FragmentHead;\r | |
749 | UINT16 FragmentOffset;\r | |
750 | IP6_CLIP_INFO *Info;\r | |
751 | EFI_IPv6_ADDRESS Loopback;\r | |
752 | \r | |
753 | HeadLen = 0;\r | |
754 | PayloadLen = 0;\r | |
755 | //\r | |
756 | // Check whether the input packet is a valid packet\r | |
757 | //\r | |
758 | if ((*Packet)->TotalSize < IP6_MIN_HEADLEN) {\r | |
759 | return EFI_INVALID_PARAMETER;\r | |
760 | }\r | |
761 | \r | |
762 | //\r | |
763 | // Get header information of the packet.\r | |
764 | //\r | |
765 | *Head = (EFI_IP6_HEADER *)NetbufGetByte (*Packet, 0, NULL);\r | |
766 | if (*Head == NULL) {\r | |
767 | return EFI_INVALID_PARAMETER;\r | |
768 | }\r | |
769 | \r | |
770 | //\r | |
771 | // Multicast addresses must not be used as source addresses in IPv6 packets.\r | |
772 | //\r | |
773 | if (((*Head)->Version != 6) || (IP6_IS_MULTICAST (&(*Head)->SourceAddress))) {\r | |
774 | return EFI_INVALID_PARAMETER;\r | |
775 | }\r | |
776 | \r | |
777 | //\r | |
778 | // A packet with a destination address of loopback ::1/128 or unspecified must be dropped.\r | |
779 | //\r | |
780 | ZeroMem (&Loopback, sizeof (EFI_IPv6_ADDRESS));\r | |
781 | Loopback.Addr[15] = 0x1;\r | |
782 | if ((CompareMem (&Loopback, &(*Head)->DestinationAddress, sizeof (EFI_IPv6_ADDRESS)) == 0) ||\r | |
783 | (NetIp6IsUnspecifiedAddr (&(*Head)->DestinationAddress)))\r | |
784 | {\r | |
785 | return EFI_INVALID_PARAMETER;\r | |
786 | }\r | |
787 | \r | |
788 | //\r | |
789 | // Convert the IP header to host byte order.\r | |
790 | //\r | |
791 | (*Packet)->Ip.Ip6 = Ip6NtohHead (*Head);\r | |
792 | \r | |
793 | //\r | |
794 | // Get the per packet info.\r | |
795 | //\r | |
796 | Info = IP6_GET_CLIP_INFO (*Packet);\r | |
797 | Info->LinkFlag = Flag;\r | |
798 | Info->CastType = 0;\r | |
799 | \r | |
800 | if (IpSb->MnpConfigData.EnablePromiscuousReceive) {\r | |
801 | Info->CastType = Ip6Promiscuous;\r | |
802 | }\r | |
803 | \r | |
804 | if (Ip6IsOneOfSetAddress (IpSb, &(*Head)->DestinationAddress, NULL, NULL)) {\r | |
805 | Info->CastType = Ip6Unicast;\r | |
806 | } else if (IP6_IS_MULTICAST (&(*Head)->DestinationAddress)) {\r | |
807 | if (Ip6FindMldEntry (IpSb, &(*Head)->DestinationAddress) != NULL) {\r | |
808 | Info->CastType = Ip6Multicast;\r | |
809 | }\r | |
810 | }\r | |
811 | \r | |
812 | //\r | |
813 | // Drop the packet that is not delivered to us.\r | |
814 | //\r | |
815 | if (Info->CastType == 0) {\r | |
816 | return EFI_INVALID_PARAMETER;\r | |
817 | }\r | |
818 | \r | |
819 | PayloadLen = (*Head)->PayloadLength;\r | |
820 | \r | |
821 | Info->Start = 0;\r | |
822 | Info->Length = PayloadLen;\r | |
823 | Info->End = Info->Start + Info->Length;\r | |
824 | Info->HeadLen = (UINT16)sizeof (EFI_IP6_HEADER);\r | |
825 | Info->Status = EFI_SUCCESS;\r | |
826 | Info->LastFrag = FALSE;\r | |
827 | \r | |
828 | TotalLen = (UINT16)(PayloadLen + sizeof (EFI_IP6_HEADER));\r | |
829 | \r | |
830 | //\r | |
831 | // Mnp may deliver frame trailer sequence up, trim it off.\r | |
832 | //\r | |
833 | if (TotalLen < (*Packet)->TotalSize) {\r | |
834 | NetbufTrim (*Packet, (*Packet)->TotalSize - TotalLen, FALSE);\r | |
835 | }\r | |
836 | \r | |
837 | if (TotalLen != (*Packet)->TotalSize) {\r | |
838 | return EFI_INVALID_PARAMETER;\r | |
839 | }\r | |
840 | \r | |
841 | //\r | |
842 | // Check the extension headers, if exist validate them\r | |
843 | //\r | |
844 | if (PayloadLen != 0) {\r | |
845 | *Payload = AllocatePool ((UINTN)PayloadLen);\r | |
846 | if (*Payload == NULL) {\r | |
847 | return EFI_INVALID_PARAMETER;\r | |
848 | }\r | |
849 | \r | |
850 | NetbufCopy (*Packet, sizeof (EFI_IP6_HEADER), PayloadLen, *Payload);\r | |
851 | }\r | |
852 | \r | |
853 | if (!Ip6IsExtsValid (\r | |
854 | IpSb,\r | |
855 | *Packet,\r | |
856 | &(*Head)->NextHeader,\r | |
857 | *Payload,\r | |
858 | (UINT32)PayloadLen,\r | |
859 | TRUE,\r | |
860 | &FormerHeadOffset,\r | |
861 | LastHead,\r | |
862 | ExtHdrsLen,\r | |
863 | UnFragmentLen,\r | |
864 | Fragmented\r | |
865 | ))\r | |
866 | {\r | |
867 | return EFI_INVALID_PARAMETER;\r | |
868 | }\r | |
869 | \r | |
870 | HeadLen = sizeof (EFI_IP6_HEADER) + *UnFragmentLen;\r | |
871 | \r | |
872 | if (*Fragmented) {\r | |
873 | //\r | |
874 | // Get the fragment offset from the Fragment header\r | |
875 | //\r | |
876 | FragmentHead = (IP6_FRAGMENT_HEADER *)NetbufGetByte (*Packet, HeadLen, NULL);\r | |
877 | if (FragmentHead == NULL) {\r | |
878 | return EFI_INVALID_PARAMETER;\r | |
879 | }\r | |
880 | \r | |
881 | FragmentOffset = NTOHS (FragmentHead->FragmentOffset);\r | |
882 | \r | |
883 | if ((FragmentOffset & 0x1) == 0) {\r | |
884 | Info->LastFrag = TRUE;\r | |
885 | }\r | |
886 | \r | |
887 | FragmentOffset &= (~0x1);\r | |
888 | \r | |
889 | //\r | |
890 | // This is the first fragment of the packet\r | |
891 | //\r | |
892 | if (FragmentOffset == 0) {\r | |
893 | Info->NextHeader = FragmentHead->NextHeader;\r | |
894 | }\r | |
895 | \r | |
896 | Info->HeadLen = (UINT16)HeadLen;\r | |
897 | HeadLen += sizeof (IP6_FRAGMENT_HEADER);\r | |
898 | Info->Start = FragmentOffset;\r | |
899 | Info->Length = TotalLen - (UINT16)HeadLen;\r | |
900 | Info->End = Info->Start + Info->Length;\r | |
901 | Info->Id = FragmentHead->Identification;\r | |
902 | Info->FormerNextHeader = FormerHeadOffset;\r | |
903 | \r | |
904 | //\r | |
905 | // Fragments should in the unit of 8 octets long except the last one.\r | |
906 | //\r | |
907 | if ((Info->LastFrag == 0) && (Info->Length % 8 != 0)) {\r | |
908 | return EFI_INVALID_PARAMETER;\r | |
909 | }\r | |
910 | \r | |
911 | //\r | |
912 | // Reassemble the packet.\r | |
913 | //\r | |
914 | *Packet = Ip6Reassemble (&IpSb->Assemble, *Packet);\r | |
915 | if (*Packet == NULL) {\r | |
916 | return EFI_INVALID_PARAMETER;\r | |
917 | }\r | |
918 | \r | |
919 | //\r | |
920 | // Re-check the assembled packet to get the right values.\r | |
921 | //\r | |
922 | *Head = (*Packet)->Ip.Ip6;\r | |
923 | PayloadLen = (*Head)->PayloadLength;\r | |
924 | if (PayloadLen != 0) {\r | |
925 | if (*Payload != NULL) {\r | |
926 | FreePool (*Payload);\r | |
927 | }\r | |
928 | \r | |
929 | *Payload = AllocatePool ((UINTN)PayloadLen);\r | |
930 | if (*Payload == NULL) {\r | |
931 | return EFI_INVALID_PARAMETER;\r | |
932 | }\r | |
933 | \r | |
934 | NetbufCopy (*Packet, sizeof (EFI_IP6_HEADER), PayloadLen, *Payload);\r | |
935 | }\r | |
936 | \r | |
937 | if (!Ip6IsExtsValid (\r | |
938 | IpSb,\r | |
939 | *Packet,\r | |
940 | &(*Head)->NextHeader,\r | |
941 | *Payload,\r | |
942 | (UINT32)PayloadLen,\r | |
943 | TRUE,\r | |
944 | NULL,\r | |
945 | LastHead,\r | |
946 | ExtHdrsLen,\r | |
947 | UnFragmentLen,\r | |
948 | Fragmented\r | |
949 | ))\r | |
950 | {\r | |
951 | return EFI_INVALID_PARAMETER;\r | |
952 | }\r | |
953 | }\r | |
954 | \r | |
955 | //\r | |
956 | // Trim the head off, after this point, the packet is headless.\r | |
957 | // and Packet->TotalLen == Info->Length.\r | |
958 | //\r | |
959 | NetbufTrim (*Packet, sizeof (EFI_IP6_HEADER) + *ExtHdrsLen, TRUE);\r | |
960 | \r | |
961 | return EFI_SUCCESS;\r | |
962 | }\r | |
963 | \r | |
964 | /**\r | |
965 | The IP6 input routine. It is called by the IP6_INTERFACE when an\r | |
966 | IP6 fragment is received from MNP.\r | |
967 | \r | |
968 | @param[in] Packet The IP6 packet received.\r | |
969 | @param[in] IoStatus The return status of receive request.\r | |
970 | @param[in] Flag The link layer flag for the packet received, such\r | |
971 | as multicast.\r | |
972 | @param[in] Context The IP6 service instance that owns the MNP.\r | |
973 | \r | |
974 | **/\r | |
975 | VOID\r | |
976 | Ip6AcceptFrame (\r | |
977 | IN NET_BUF *Packet,\r | |
978 | IN EFI_STATUS IoStatus,\r | |
979 | IN UINT32 Flag,\r | |
980 | IN VOID *Context\r | |
981 | )\r | |
982 | {\r | |
983 | IP6_SERVICE *IpSb;\r | |
984 | EFI_IP6_HEADER *Head;\r | |
985 | UINT8 *Payload;\r | |
986 | UINT8 *LastHead;\r | |
987 | UINT32 UnFragmentLen;\r | |
988 | UINT32 ExtHdrsLen;\r | |
989 | BOOLEAN Fragmented;\r | |
990 | EFI_STATUS Status;\r | |
991 | EFI_IP6_HEADER ZeroHead;\r | |
992 | \r | |
993 | IpSb = (IP6_SERVICE *)Context;\r | |
994 | NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);\r | |
995 | \r | |
996 | Payload = NULL;\r | |
997 | LastHead = NULL;\r | |
998 | \r | |
999 | //\r | |
1000 | // Check input parameters\r | |
1001 | //\r | |
1002 | if (EFI_ERROR (IoStatus) || (IpSb->State == IP6_SERVICE_DESTROY)) {\r | |
1003 | goto Drop;\r | |
1004 | }\r | |
1005 | \r | |
1006 | //\r | |
1007 | // Pre-Process the Ipv6 Packet and then reassemble if it is necessary.\r | |
1008 | //\r | |
1009 | Status = Ip6PreProcessPacket (\r | |
1010 | IpSb,\r | |
1011 | &Packet,\r | |
1012 | Flag,\r | |
1013 | &Payload,\r | |
1014 | &LastHead,\r | |
1015 | &ExtHdrsLen,\r | |
1016 | &UnFragmentLen,\r | |
1017 | &Fragmented,\r | |
1018 | &Head\r | |
1019 | );\r | |
1020 | if (EFI_ERROR (Status)) {\r | |
1021 | goto Restart;\r | |
1022 | }\r | |
1023 | \r | |
1024 | //\r | |
1025 | // After trim off, the packet is a esp/ah/udp/tcp/icmp6 net buffer,\r | |
1026 | // and no need consider any other ahead ext headers.\r | |
1027 | //\r | |
1028 | Status = Ip6IpSecProcessPacket (\r | |
1029 | IpSb,\r | |
1030 | &Head,\r | |
1031 | LastHead, // need get the lasthead value for input\r | |
1032 | &Packet,\r | |
1033 | &Payload,\r | |
1034 | &ExtHdrsLen,\r | |
1035 | EfiIPsecInBound,\r | |
1036 | NULL\r | |
1037 | );\r | |
1038 | \r | |
1039 | if (EFI_ERROR (Status)) {\r | |
1040 | goto Restart;\r | |
1041 | }\r | |
1042 | \r | |
1043 | //\r | |
1044 | // If the packet is protected by IPsec Tunnel Mode, Check the Inner Ip Packet.\r | |
1045 | //\r | |
1046 | ZeroMem (&ZeroHead, sizeof (EFI_IP6_HEADER));\r | |
1047 | if (0 == CompareMem (Head, &ZeroHead, sizeof (EFI_IP6_HEADER))) {\r | |
1048 | Status = Ip6PreProcessPacket (\r | |
1049 | IpSb,\r | |
1050 | &Packet,\r | |
1051 | Flag,\r | |
1052 | &Payload,\r | |
1053 | &LastHead,\r | |
1054 | &ExtHdrsLen,\r | |
1055 | &UnFragmentLen,\r | |
1056 | &Fragmented,\r | |
1057 | &Head\r | |
1058 | );\r | |
1059 | if (EFI_ERROR (Status)) {\r | |
1060 | goto Restart;\r | |
1061 | }\r | |
1062 | }\r | |
1063 | \r | |
1064 | //\r | |
1065 | // Check the Packet again.\r | |
1066 | //\r | |
1067 | if (Packet == NULL) {\r | |
1068 | goto Restart;\r | |
1069 | }\r | |
1070 | \r | |
1071 | //\r | |
1072 | // Packet may have been changed. The ownership of the packet\r | |
1073 | // is transferred to the packet process logic.\r | |
1074 | //\r | |
1075 | Head = Packet->Ip.Ip6;\r | |
1076 | IP6_GET_CLIP_INFO (Packet)->Status = EFI_SUCCESS;\r | |
1077 | \r | |
1078 | switch (*LastHead) {\r | |
1079 | case IP6_ICMP:\r | |
1080 | Ip6IcmpHandle (IpSb, Head, Packet);\r | |
1081 | break;\r | |
1082 | default:\r | |
1083 | Ip6Demultiplex (IpSb, Head, Packet);\r | |
1084 | }\r | |
1085 | \r | |
1086 | Packet = NULL;\r | |
1087 | \r | |
1088 | //\r | |
1089 | // Dispatch the DPCs queued by the NotifyFunction of the rx token's events\r | |
1090 | // which are signaled with received data.\r | |
1091 | //\r | |
1092 | DispatchDpc ();\r | |
1093 | \r | |
1094 | Restart:\r | |
1095 | if (Payload != NULL) {\r | |
1096 | FreePool (Payload);\r | |
1097 | }\r | |
1098 | \r | |
1099 | Ip6ReceiveFrame (Ip6AcceptFrame, IpSb);\r | |
1100 | \r | |
1101 | Drop:\r | |
1102 | if (Packet != NULL) {\r | |
1103 | NetbufFree (Packet);\r | |
1104 | }\r | |
1105 | \r | |
1106 | return;\r | |
1107 | }\r | |
1108 | \r | |
1109 | /**\r | |
1110 | Initialize an already allocated assemble table. This is generally\r | |
1111 | the assemble table embedded in the IP6 service instance.\r | |
1112 | \r | |
1113 | @param[in, out] Table The assemble table to initialize.\r | |
1114 | \r | |
1115 | **/\r | |
1116 | VOID\r | |
1117 | Ip6CreateAssembleTable (\r | |
1118 | IN OUT IP6_ASSEMBLE_TABLE *Table\r | |
1119 | )\r | |
1120 | {\r | |
1121 | UINT32 Index;\r | |
1122 | \r | |
1123 | for (Index = 0; Index < IP6_ASSEMLE_HASH_SIZE; Index++) {\r | |
1124 | InitializeListHead (&Table->Bucket[Index]);\r | |
1125 | }\r | |
1126 | }\r | |
1127 | \r | |
1128 | /**\r | |
1129 | Clean up the assemble table by removing all of the fragments\r | |
1130 | and assemble entries.\r | |
1131 | \r | |
1132 | @param[in, out] Table The assemble table to clean up.\r | |
1133 | \r | |
1134 | **/\r | |
1135 | VOID\r | |
1136 | Ip6CleanAssembleTable (\r | |
1137 | IN OUT IP6_ASSEMBLE_TABLE *Table\r | |
1138 | )\r | |
1139 | {\r | |
1140 | LIST_ENTRY *Entry;\r | |
1141 | LIST_ENTRY *Next;\r | |
1142 | IP6_ASSEMBLE_ENTRY *Assemble;\r | |
1143 | UINT32 Index;\r | |
1144 | \r | |
1145 | for (Index = 0; Index < IP6_ASSEMLE_HASH_SIZE; Index++) {\r | |
1146 | NET_LIST_FOR_EACH_SAFE (Entry, Next, &Table->Bucket[Index]) {\r | |
1147 | Assemble = NET_LIST_USER_STRUCT (Entry, IP6_ASSEMBLE_ENTRY, Link);\r | |
1148 | \r | |
1149 | RemoveEntryList (Entry);\r | |
1150 | Ip6FreeAssembleEntry (Assemble);\r | |
1151 | }\r | |
1152 | }\r | |
1153 | }\r | |
1154 | \r | |
1155 | /**\r | |
1156 | The signal handle of IP6's recycle event. It is called back\r | |
1157 | when the upper layer releases the packet.\r | |
1158 | \r | |
1159 | @param[in] Event The IP6's recycle event.\r | |
1160 | @param[in] Context The context of the handle, which is a IP6_RXDATA_WRAP.\r | |
1161 | \r | |
1162 | **/\r | |
1163 | VOID\r | |
1164 | EFIAPI\r | |
1165 | Ip6OnRecyclePacket (\r | |
1166 | IN EFI_EVENT Event,\r | |
1167 | IN VOID *Context\r | |
1168 | )\r | |
1169 | {\r | |
1170 | IP6_RXDATA_WRAP *Wrap;\r | |
1171 | \r | |
1172 | Wrap = (IP6_RXDATA_WRAP *)Context;\r | |
1173 | \r | |
1174 | EfiAcquireLockOrFail (&Wrap->IpInstance->RecycleLock);\r | |
1175 | RemoveEntryList (&Wrap->Link);\r | |
1176 | EfiReleaseLock (&Wrap->IpInstance->RecycleLock);\r | |
1177 | \r | |
1178 | ASSERT (!NET_BUF_SHARED (Wrap->Packet));\r | |
1179 | NetbufFree (Wrap->Packet);\r | |
1180 | \r | |
1181 | gBS->CloseEvent (Wrap->RxData.RecycleSignal);\r | |
1182 | FreePool (Wrap);\r | |
1183 | }\r | |
1184 | \r | |
1185 | /**\r | |
1186 | Wrap the received packet to a IP6_RXDATA_WRAP, which will be\r | |
1187 | delivered to the upper layer. Each IP6 child that accepts the\r | |
1188 | packet will get a not-shared copy of the packet which is wrapped\r | |
1189 | in the IP6_RXDATA_WRAP. The IP6_RXDATA_WRAP->RxData is passed\r | |
1190 | to the upper layer. The upper layer will signal the recycle event in\r | |
1191 | it when it is done with the packet.\r | |
1192 | \r | |
1193 | @param[in] IpInstance The IP6 child to receive the packet.\r | |
1194 | @param[in] Packet The packet to deliver up.\r | |
1195 | \r | |
1196 | @return NULL if it failed to wrap the packet; otherwise, the wrapper.\r | |
1197 | \r | |
1198 | **/\r | |
1199 | IP6_RXDATA_WRAP *\r | |
1200 | Ip6WrapRxData (\r | |
1201 | IN IP6_PROTOCOL *IpInstance,\r | |
1202 | IN NET_BUF *Packet\r | |
1203 | )\r | |
1204 | {\r | |
1205 | IP6_RXDATA_WRAP *Wrap;\r | |
1206 | EFI_IP6_RECEIVE_DATA *RxData;\r | |
1207 | EFI_STATUS Status;\r | |
1208 | \r | |
1209 | Wrap = AllocatePool (IP6_RXDATA_WRAP_SIZE (Packet->BlockOpNum));\r | |
1210 | \r | |
1211 | if (Wrap == NULL) {\r | |
1212 | return NULL;\r | |
1213 | }\r | |
1214 | \r | |
1215 | InitializeListHead (&Wrap->Link);\r | |
1216 | \r | |
1217 | Wrap->IpInstance = IpInstance;\r | |
1218 | Wrap->Packet = Packet;\r | |
1219 | RxData = &Wrap->RxData;\r | |
1220 | \r | |
1221 | ZeroMem (&RxData->TimeStamp, sizeof (EFI_TIME));\r | |
1222 | \r | |
1223 | Status = gBS->CreateEvent (\r | |
1224 | EVT_NOTIFY_SIGNAL,\r | |
1225 | TPL_NOTIFY,\r | |
1226 | Ip6OnRecyclePacket,\r | |
1227 | Wrap,\r | |
1228 | &RxData->RecycleSignal\r | |
1229 | );\r | |
1230 | \r | |
1231 | if (EFI_ERROR (Status)) {\r | |
1232 | FreePool (Wrap);\r | |
1233 | return NULL;\r | |
1234 | }\r | |
1235 | \r | |
1236 | ASSERT (Packet->Ip.Ip6 != NULL);\r | |
1237 | \r | |
1238 | //\r | |
1239 | // The application expects a network byte order header.\r | |
1240 | //\r | |
1241 | RxData->HeaderLength = sizeof (EFI_IP6_HEADER);\r | |
1242 | RxData->Header = (EFI_IP6_HEADER *)Ip6NtohHead (Packet->Ip.Ip6);\r | |
1243 | RxData->DataLength = Packet->TotalSize;\r | |
1244 | \r | |
1245 | //\r | |
1246 | // Build the fragment table to be delivered up.\r | |
1247 | //\r | |
1248 | RxData->FragmentCount = Packet->BlockOpNum;\r | |
1249 | NetbufBuildExt (Packet, (NET_FRAGMENT *)RxData->FragmentTable, &RxData->FragmentCount);\r | |
1250 | \r | |
1251 | return Wrap;\r | |
1252 | }\r | |
1253 | \r | |
1254 | /**\r | |
1255 | Check whether this IP child accepts the packet.\r | |
1256 | \r | |
1257 | @param[in] IpInstance The IP child to check.\r | |
1258 | @param[in] Head The IP header of the packet.\r | |
1259 | @param[in] Packet The data of the packet.\r | |
1260 | \r | |
1261 | @retval TRUE The child wants to receive the packet.\r | |
1262 | @retval FALSE The child does not want to receive the packet.\r | |
1263 | \r | |
1264 | **/\r | |
1265 | BOOLEAN\r | |
1266 | Ip6InstanceFrameAcceptable (\r | |
1267 | IN IP6_PROTOCOL *IpInstance,\r | |
1268 | IN EFI_IP6_HEADER *Head,\r | |
1269 | IN NET_BUF *Packet\r | |
1270 | )\r | |
1271 | {\r | |
1272 | IP6_ICMP_ERROR_HEAD Icmp;\r | |
1273 | EFI_IP6_CONFIG_DATA *Config;\r | |
1274 | IP6_CLIP_INFO *Info;\r | |
1275 | UINT8 *Proto;\r | |
1276 | UINT32 Index;\r | |
1277 | UINT8 *ExtHdrs;\r | |
1278 | UINT16 ErrMsgPayloadLen;\r | |
1279 | UINT8 *ErrMsgPayload;\r | |
1280 | \r | |
1281 | Config = &IpInstance->ConfigData;\r | |
1282 | Proto = NULL;\r | |
1283 | \r | |
1284 | //\r | |
1285 | // Dirty trick for the Tiano UEFI network stack implementation. If\r | |
1286 | // ReceiveTimeout == -1, the receive of the packet for this instance\r | |
1287 | // is disabled. The UEFI spec don't have such captibility. We add\r | |
1288 | // this to improve the performance because IP will make a copy of\r | |
1289 | // the received packet for each accepting instance. Some IP instances\r | |
1290 | // used by UDP/TCP only send packets, they don't wants to receive.\r | |
1291 | //\r | |
1292 | if (Config->ReceiveTimeout == (UINT32)(-1)) {\r | |
1293 | return FALSE;\r | |
1294 | }\r | |
1295 | \r | |
1296 | if (Config->AcceptPromiscuous) {\r | |
1297 | return TRUE;\r | |
1298 | }\r | |
1299 | \r | |
1300 | //\r | |
1301 | // Check whether the protocol is acceptable.\r | |
1302 | //\r | |
1303 | ExtHdrs = NetbufGetByte (Packet, 0, NULL);\r | |
1304 | \r | |
1305 | if (!Ip6IsExtsValid (\r | |
1306 | IpInstance->Service,\r | |
1307 | Packet,\r | |
1308 | &Head->NextHeader,\r | |
1309 | ExtHdrs,\r | |
1310 | (UINT32)Head->PayloadLength,\r | |
1311 | TRUE,\r | |
1312 | NULL,\r | |
1313 | &Proto,\r | |
1314 | NULL,\r | |
1315 | NULL,\r | |
1316 | NULL\r | |
1317 | ))\r | |
1318 | {\r | |
1319 | return FALSE;\r | |
1320 | }\r | |
1321 | \r | |
1322 | //\r | |
1323 | // The upper layer driver may want to receive the ICMPv6 error packet\r | |
1324 | // invoked by its packet, like UDP.\r | |
1325 | //\r | |
1326 | if ((*Proto == IP6_ICMP) && (!Config->AcceptAnyProtocol) && (*Proto != Config->DefaultProtocol)) {\r | |
1327 | NetbufCopy (Packet, 0, sizeof (Icmp), (UINT8 *)&Icmp);\r | |
1328 | \r | |
1329 | if (Icmp.Head.Type <= ICMP_V6_ERROR_MAX) {\r | |
1330 | if (!Config->AcceptIcmpErrors) {\r | |
1331 | return FALSE;\r | |
1332 | }\r | |
1333 | \r | |
1334 | //\r | |
1335 | // Get the protocol of the invoking packet of ICMPv6 error packet.\r | |
1336 | //\r | |
1337 | ErrMsgPayloadLen = NTOHS (Icmp.IpHead.PayloadLength);\r | |
1338 | ErrMsgPayload = NetbufGetByte (Packet, sizeof (Icmp), NULL);\r | |
1339 | \r | |
1340 | if (!Ip6IsExtsValid (\r | |
1341 | NULL,\r | |
1342 | NULL,\r | |
1343 | &Icmp.IpHead.NextHeader,\r | |
1344 | ErrMsgPayload,\r | |
1345 | ErrMsgPayloadLen,\r | |
1346 | TRUE,\r | |
1347 | NULL,\r | |
1348 | &Proto,\r | |
1349 | NULL,\r | |
1350 | NULL,\r | |
1351 | NULL\r | |
1352 | ))\r | |
1353 | {\r | |
1354 | return FALSE;\r | |
1355 | }\r | |
1356 | }\r | |
1357 | }\r | |
1358 | \r | |
1359 | //\r | |
1360 | // Match the protocol\r | |
1361 | //\r | |
1362 | if (!Config->AcceptAnyProtocol && (*Proto != Config->DefaultProtocol)) {\r | |
1363 | return FALSE;\r | |
1364 | }\r | |
1365 | \r | |
1366 | //\r | |
1367 | // Check for broadcast, the caller has computed the packet's\r | |
1368 | // cast type for this child's interface.\r | |
1369 | //\r | |
1370 | Info = IP6_GET_CLIP_INFO (Packet);\r | |
1371 | \r | |
1372 | //\r | |
1373 | // If it is a multicast packet, check whether we are in the group.\r | |
1374 | //\r | |
1375 | if (Info->CastType == Ip6Multicast) {\r | |
1376 | //\r | |
1377 | // Receive the multicast if the instance wants to receive all packets.\r | |
1378 | //\r | |
1379 | if (NetIp6IsUnspecifiedAddr (&IpInstance->ConfigData.StationAddress)) {\r | |
1380 | return TRUE;\r | |
1381 | }\r | |
1382 | \r | |
1383 | for (Index = 0; Index < IpInstance->GroupCount; Index++) {\r | |
1384 | if (EFI_IP6_EQUAL (IpInstance->GroupList + Index, &Head->DestinationAddress)) {\r | |
1385 | break;\r | |
1386 | }\r | |
1387 | }\r | |
1388 | \r | |
1389 | return (BOOLEAN)(Index < IpInstance->GroupCount);\r | |
1390 | }\r | |
1391 | \r | |
1392 | return TRUE;\r | |
1393 | }\r | |
1394 | \r | |
1395 | /**\r | |
1396 | Enqueue a shared copy of the packet to the IP6 child if the\r | |
1397 | packet is acceptable to it. Here the data of the packet is\r | |
1398 | shared, but the net buffer isn't.\r | |
1399 | \r | |
1400 | @param IpInstance The IP6 child to enqueue the packet to.\r | |
1401 | @param Head The IP header of the received packet.\r | |
1402 | @param Packet The data of the received packet.\r | |
1403 | \r | |
1404 | @retval EFI_NOT_STARTED The IP child hasn't been configured.\r | |
1405 | @retval EFI_INVALID_PARAMETER The child doesn't want to receive the packet.\r | |
1406 | @retval EFI_OUT_OF_RESOURCES Failed to allocate some resources\r | |
1407 | @retval EFI_SUCCESS A shared copy the packet is enqueued to the child.\r | |
1408 | \r | |
1409 | **/\r | |
1410 | EFI_STATUS\r | |
1411 | Ip6InstanceEnquePacket (\r | |
1412 | IN IP6_PROTOCOL *IpInstance,\r | |
1413 | IN EFI_IP6_HEADER *Head,\r | |
1414 | IN NET_BUF *Packet\r | |
1415 | )\r | |
1416 | {\r | |
1417 | IP6_CLIP_INFO *Info;\r | |
1418 | NET_BUF *Clone;\r | |
1419 | \r | |
1420 | //\r | |
1421 | // Check whether the packet is acceptable to this instance.\r | |
1422 | //\r | |
1423 | if (IpInstance->State != IP6_STATE_CONFIGED) {\r | |
1424 | return EFI_NOT_STARTED;\r | |
1425 | }\r | |
1426 | \r | |
1427 | if (!Ip6InstanceFrameAcceptable (IpInstance, Head, Packet)) {\r | |
1428 | return EFI_INVALID_PARAMETER;\r | |
1429 | }\r | |
1430 | \r | |
1431 | //\r | |
1432 | // Enqueue a shared copy of the packet.\r | |
1433 | //\r | |
1434 | Clone = NetbufClone (Packet);\r | |
1435 | \r | |
1436 | if (Clone == NULL) {\r | |
1437 | return EFI_OUT_OF_RESOURCES;\r | |
1438 | }\r | |
1439 | \r | |
1440 | //\r | |
1441 | // Set the receive time out for the assembled packet. If it expires,\r | |
1442 | // packet will be removed from the queue.\r | |
1443 | //\r | |
1444 | Info = IP6_GET_CLIP_INFO (Clone);\r | |
1445 | Info->Life = IP6_US_TO_SEC (IpInstance->ConfigData.ReceiveTimeout);\r | |
1446 | \r | |
1447 | InsertTailList (&IpInstance->Received, &Clone->List);\r | |
1448 | return EFI_SUCCESS;\r | |
1449 | }\r | |
1450 | \r | |
1451 | /**\r | |
1452 | Deliver the received packets to the upper layer if there are both received\r | |
1453 | requests and enqueued packets. If the enqueued packet is shared, it will\r | |
1454 | duplicate it to a non-shared packet, release the shared packet, then\r | |
1455 | deliver the non-shared packet up.\r | |
1456 | \r | |
1457 | @param[in] IpInstance The IP child to deliver the packet up.\r | |
1458 | \r | |
1459 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resources to deliver the\r | |
1460 | packets.\r | |
1461 | @retval EFI_SUCCESS All the enqueued packets that can be delivered\r | |
1462 | are delivered up.\r | |
1463 | \r | |
1464 | **/\r | |
1465 | EFI_STATUS\r | |
1466 | Ip6InstanceDeliverPacket (\r | |
1467 | IN IP6_PROTOCOL *IpInstance\r | |
1468 | )\r | |
1469 | {\r | |
1470 | EFI_IP6_COMPLETION_TOKEN *Token;\r | |
1471 | IP6_RXDATA_WRAP *Wrap;\r | |
1472 | NET_BUF *Packet;\r | |
1473 | NET_BUF *Dup;\r | |
1474 | UINT8 *Head;\r | |
1475 | \r | |
1476 | //\r | |
1477 | // Deliver a packet if there are both a packet and a receive token.\r | |
1478 | //\r | |
1479 | while (!IsListEmpty (&IpInstance->Received) && !NetMapIsEmpty (&IpInstance->RxTokens)) {\r | |
1480 | Packet = NET_LIST_HEAD (&IpInstance->Received, NET_BUF, List);\r | |
1481 | \r | |
1482 | if (!NET_BUF_SHARED (Packet)) {\r | |
1483 | //\r | |
1484 | // If this is the only instance that wants the packet, wrap it up.\r | |
1485 | //\r | |
1486 | Wrap = Ip6WrapRxData (IpInstance, Packet);\r | |
1487 | \r | |
1488 | if (Wrap == NULL) {\r | |
1489 | return EFI_OUT_OF_RESOURCES;\r | |
1490 | }\r | |
1491 | \r | |
1492 | RemoveEntryList (&Packet->List);\r | |
1493 | } else {\r | |
1494 | //\r | |
1495 | // Create a duplicated packet if this packet is shared\r | |
1496 | //\r | |
1497 | Dup = NetbufDuplicate (Packet, NULL, sizeof (EFI_IP6_HEADER));\r | |
1498 | \r | |
1499 | if (Dup == NULL) {\r | |
1500 | return EFI_OUT_OF_RESOURCES;\r | |
1501 | }\r | |
1502 | \r | |
1503 | //\r | |
1504 | // Copy the IP head over. The packet to deliver up is\r | |
1505 | // headless. Trim the head off after copy. The IP head\r | |
1506 | // may be not continuous before the data.\r | |
1507 | //\r | |
1508 | Head = NetbufAllocSpace (Dup, sizeof (EFI_IP6_HEADER), NET_BUF_HEAD);\r | |
1509 | ASSERT (Head != NULL);\r | |
1510 | Dup->Ip.Ip6 = (EFI_IP6_HEADER *)Head;\r | |
1511 | \r | |
1512 | CopyMem (Head, Packet->Ip.Ip6, sizeof (EFI_IP6_HEADER));\r | |
1513 | NetbufTrim (Dup, sizeof (EFI_IP6_HEADER), TRUE);\r | |
1514 | \r | |
1515 | Wrap = Ip6WrapRxData (IpInstance, Dup);\r | |
1516 | \r | |
1517 | if (Wrap == NULL) {\r | |
1518 | NetbufFree (Dup);\r | |
1519 | return EFI_OUT_OF_RESOURCES;\r | |
1520 | }\r | |
1521 | \r | |
1522 | RemoveEntryList (&Packet->List);\r | |
1523 | NetbufFree (Packet);\r | |
1524 | \r | |
1525 | Packet = Dup;\r | |
1526 | }\r | |
1527 | \r | |
1528 | //\r | |
1529 | // Insert it into the delivered packet, then get a user's\r | |
1530 | // receive token, pass the wrapped packet up.\r | |
1531 | //\r | |
1532 | EfiAcquireLockOrFail (&IpInstance->RecycleLock);\r | |
1533 | InsertHeadList (&IpInstance->Delivered, &Wrap->Link);\r | |
1534 | EfiReleaseLock (&IpInstance->RecycleLock);\r | |
1535 | \r | |
1536 | Token = NetMapRemoveHead (&IpInstance->RxTokens, NULL);\r | |
1537 | Token->Status = IP6_GET_CLIP_INFO (Packet)->Status;\r | |
1538 | Token->Packet.RxData = &Wrap->RxData;\r | |
1539 | \r | |
1540 | gBS->SignalEvent (Token->Event);\r | |
1541 | }\r | |
1542 | \r | |
1543 | return EFI_SUCCESS;\r | |
1544 | }\r | |
1545 | \r | |
1546 | /**\r | |
1547 | Enqueue a received packet to all the IP children that share\r | |
1548 | the same interface.\r | |
1549 | \r | |
1550 | @param[in] IpSb The IP6 service instance that receive the packet.\r | |
1551 | @param[in] Head The header of the received packet.\r | |
1552 | @param[in] Packet The data of the received packet.\r | |
1553 | @param[in] IpIf The interface to enqueue the packet to.\r | |
1554 | \r | |
1555 | @return The number of the IP6 children that accepts the packet.\r | |
1556 | \r | |
1557 | **/\r | |
1558 | INTN\r | |
1559 | Ip6InterfaceEnquePacket (\r | |
1560 | IN IP6_SERVICE *IpSb,\r | |
1561 | IN EFI_IP6_HEADER *Head,\r | |
1562 | IN NET_BUF *Packet,\r | |
1563 | IN IP6_INTERFACE *IpIf\r | |
1564 | )\r | |
1565 | {\r | |
1566 | IP6_PROTOCOL *IpInstance;\r | |
1567 | IP6_CLIP_INFO *Info;\r | |
1568 | LIST_ENTRY *Entry;\r | |
1569 | INTN Enqueued;\r | |
1570 | INTN LocalType;\r | |
1571 | INTN SavedType;\r | |
1572 | \r | |
1573 | //\r | |
1574 | // First, check that the packet is acceptable to this interface\r | |
1575 | // and find the local cast type for the interface.\r | |
1576 | //\r | |
1577 | LocalType = 0;\r | |
1578 | Info = IP6_GET_CLIP_INFO (Packet);\r | |
1579 | \r | |
1580 | if (IpIf->PromiscRecv) {\r | |
1581 | LocalType = Ip6Promiscuous;\r | |
1582 | } else {\r | |
1583 | LocalType = Info->CastType;\r | |
1584 | }\r | |
1585 | \r | |
1586 | //\r | |
1587 | // Iterate through the ip instances on the interface, enqueue\r | |
1588 | // the packet if filter passed. Save the original cast type,\r | |
1589 | // and pass the local cast type to the IP children on the\r | |
1590 | // interface. The global cast type will be restored later.\r | |
1591 | //\r | |
1592 | SavedType = Info->CastType;\r | |
1593 | Info->CastType = (UINT32)LocalType;\r | |
1594 | \r | |
1595 | Enqueued = 0;\r | |
1596 | \r | |
1597 | NET_LIST_FOR_EACH (Entry, &IpIf->IpInstances) {\r | |
1598 | IpInstance = NET_LIST_USER_STRUCT (Entry, IP6_PROTOCOL, AddrLink);\r | |
1599 | NET_CHECK_SIGNATURE (IpInstance, IP6_PROTOCOL_SIGNATURE);\r | |
1600 | \r | |
1601 | if (Ip6InstanceEnquePacket (IpInstance, Head, Packet) == EFI_SUCCESS) {\r | |
1602 | Enqueued++;\r | |
1603 | }\r | |
1604 | }\r | |
1605 | \r | |
1606 | Info->CastType = (UINT32)SavedType;\r | |
1607 | return Enqueued;\r | |
1608 | }\r | |
1609 | \r | |
1610 | /**\r | |
1611 | Deliver the packet for each IP6 child on the interface.\r | |
1612 | \r | |
1613 | @param[in] IpSb The IP6 service instance that received the packet.\r | |
1614 | @param[in] IpIf The IP6 interface to deliver the packet.\r | |
1615 | \r | |
1616 | **/\r | |
1617 | VOID\r | |
1618 | Ip6InterfaceDeliverPacket (\r | |
1619 | IN IP6_SERVICE *IpSb,\r | |
1620 | IN IP6_INTERFACE *IpIf\r | |
1621 | )\r | |
1622 | {\r | |
1623 | IP6_PROTOCOL *IpInstance;\r | |
1624 | LIST_ENTRY *Entry;\r | |
1625 | \r | |
1626 | NET_LIST_FOR_EACH (Entry, &IpIf->IpInstances) {\r | |
1627 | IpInstance = NET_LIST_USER_STRUCT (Entry, IP6_PROTOCOL, AddrLink);\r | |
1628 | Ip6InstanceDeliverPacket (IpInstance);\r | |
1629 | }\r | |
1630 | }\r | |
1631 | \r | |
1632 | /**\r | |
1633 | De-multiplex the packet. the packet delivery is processed in two\r | |
1634 | passes. The first pass will enqueue a shared copy of the packet\r | |
1635 | to each IP6 child that accepts the packet. The second pass will\r | |
1636 | deliver a non-shared copy of the packet to each IP6 child that\r | |
1637 | has pending receive requests. Data is copied if more than one\r | |
1638 | child wants to consume the packet, because each IP child needs\r | |
1639 | its own copy of the packet to make changes.\r | |
1640 | \r | |
1641 | @param[in] IpSb The IP6 service instance that received the packet.\r | |
1642 | @param[in] Head The header of the received packet.\r | |
1643 | @param[in] Packet The data of the received packet.\r | |
1644 | \r | |
1645 | @retval EFI_NOT_FOUND No IP child accepts the packet.\r | |
1646 | @retval EFI_SUCCESS The packet is enqueued or delivered to some IP\r | |
1647 | children.\r | |
1648 | \r | |
1649 | **/\r | |
1650 | EFI_STATUS\r | |
1651 | Ip6Demultiplex (\r | |
1652 | IN IP6_SERVICE *IpSb,\r | |
1653 | IN EFI_IP6_HEADER *Head,\r | |
1654 | IN NET_BUF *Packet\r | |
1655 | )\r | |
1656 | {\r | |
1657 | LIST_ENTRY *Entry;\r | |
1658 | IP6_INTERFACE *IpIf;\r | |
1659 | INTN Enqueued;\r | |
1660 | \r | |
1661 | //\r | |
1662 | // Two pass delivery: first, enqueue a shared copy of the packet\r | |
1663 | // to each instance that accept the packet.\r | |
1664 | //\r | |
1665 | Enqueued = 0;\r | |
1666 | \r | |
1667 | NET_LIST_FOR_EACH (Entry, &IpSb->Interfaces) {\r | |
1668 | IpIf = NET_LIST_USER_STRUCT (Entry, IP6_INTERFACE, Link);\r | |
1669 | \r | |
1670 | if (IpIf->Configured) {\r | |
1671 | Enqueued += Ip6InterfaceEnquePacket (IpSb, Head, Packet, IpIf);\r | |
1672 | }\r | |
1673 | }\r | |
1674 | \r | |
1675 | //\r | |
1676 | // Second: deliver a duplicate of the packet to each instance.\r | |
1677 | // Release the local reference first, so that the last instance\r | |
1678 | // getting the packet will not copy the data.\r | |
1679 | //\r | |
1680 | NetbufFree (Packet);\r | |
1681 | Packet = NULL;\r | |
1682 | \r | |
1683 | if (Enqueued == 0) {\r | |
1684 | return EFI_NOT_FOUND;\r | |
1685 | }\r | |
1686 | \r | |
1687 | NET_LIST_FOR_EACH (Entry, &IpSb->Interfaces) {\r | |
1688 | IpIf = NET_LIST_USER_STRUCT (Entry, IP6_INTERFACE, Link);\r | |
1689 | \r | |
1690 | if (IpIf->Configured) {\r | |
1691 | Ip6InterfaceDeliverPacket (IpSb, IpIf);\r | |
1692 | }\r | |
1693 | }\r | |
1694 | \r | |
1695 | return EFI_SUCCESS;\r | |
1696 | }\r | |
1697 | \r | |
1698 | /**\r | |
1699 | Decrease the life of the transmitted packets. If it is\r | |
1700 | decreased to zero, cancel the packet. This function is\r | |
1701 | called by Ip6packetTimerTicking that provides timeout for both the\r | |
1702 | received-but-not-delivered and transmitted-but-not-recycle\r | |
1703 | packets.\r | |
1704 | \r | |
1705 | @param[in] Map The IP6 child's transmit map.\r | |
1706 | @param[in] Item Current transmitted packet.\r | |
1707 | @param[in] Context Not used.\r | |
1708 | \r | |
1709 | @retval EFI_SUCCESS Always returns EFI_SUCCESS.\r | |
1710 | \r | |
1711 | **/\r | |
1712 | EFI_STATUS\r | |
1713 | EFIAPI\r | |
1714 | Ip6SentPacketTicking (\r | |
1715 | IN NET_MAP *Map,\r | |
1716 | IN NET_MAP_ITEM *Item,\r | |
1717 | IN VOID *Context\r | |
1718 | )\r | |
1719 | {\r | |
1720 | IP6_TXTOKEN_WRAP *Wrap;\r | |
1721 | \r | |
1722 | Wrap = (IP6_TXTOKEN_WRAP *)Item->Value;\r | |
1723 | ASSERT (Wrap != NULL);\r | |
1724 | \r | |
1725 | if ((Wrap->Life > 0) && (--Wrap->Life == 0)) {\r | |
1726 | Ip6CancelPacket (Wrap->IpInstance->Interface, Wrap->Packet, EFI_ABORTED);\r | |
1727 | }\r | |
1728 | \r | |
1729 | return EFI_SUCCESS;\r | |
1730 | }\r | |
1731 | \r | |
1732 | /**\r | |
1733 | Timeout the fragments, and the enqueued, and transmitted packets.\r | |
1734 | \r | |
1735 | @param[in] IpSb The IP6 service instance to timeout.\r | |
1736 | \r | |
1737 | **/\r | |
1738 | VOID\r | |
1739 | Ip6PacketTimerTicking (\r | |
1740 | IN IP6_SERVICE *IpSb\r | |
1741 | )\r | |
1742 | {\r | |
1743 | LIST_ENTRY *InstanceEntry;\r | |
1744 | LIST_ENTRY *Entry;\r | |
1745 | LIST_ENTRY *Next;\r | |
1746 | IP6_PROTOCOL *IpInstance;\r | |
1747 | IP6_ASSEMBLE_ENTRY *Assemble;\r | |
1748 | NET_BUF *Packet;\r | |
1749 | IP6_CLIP_INFO *Info;\r | |
1750 | UINT32 Index;\r | |
1751 | \r | |
1752 | //\r | |
1753 | // First, time out the fragments. The packet's life is counting down\r | |
1754 | // once the first-arriving fragment of that packet was received.\r | |
1755 | //\r | |
1756 | for (Index = 0; Index < IP6_ASSEMLE_HASH_SIZE; Index++) {\r | |
1757 | NET_LIST_FOR_EACH_SAFE (Entry, Next, &(IpSb->Assemble.Bucket[Index])) {\r | |
1758 | Assemble = NET_LIST_USER_STRUCT (Entry, IP6_ASSEMBLE_ENTRY, Link);\r | |
1759 | \r | |
1760 | if ((Assemble->Life > 0) && (--Assemble->Life == 0)) {\r | |
1761 | //\r | |
1762 | // If the first fragment (the one with a Fragment Offset of zero)\r | |
1763 | // has been received, an ICMP Time Exceeded - Fragment Reassembly\r | |
1764 | // Time Exceeded message should be sent to the source of that fragment.\r | |
1765 | //\r | |
1766 | if ((Assemble->Packet != NULL) &&\r | |
1767 | !IP6_IS_MULTICAST (&Assemble->Head->DestinationAddress))\r | |
1768 | {\r | |
1769 | Ip6SendIcmpError (\r | |
1770 | IpSb,\r | |
1771 | Assemble->Packet,\r | |
1772 | NULL,\r | |
1773 | &Assemble->Head->SourceAddress,\r | |
1774 | ICMP_V6_TIME_EXCEEDED,\r | |
1775 | ICMP_V6_TIMEOUT_REASSEMBLE,\r | |
1776 | NULL\r | |
1777 | );\r | |
1778 | }\r | |
1779 | \r | |
1780 | //\r | |
1781 | // If reassembly of a packet is not completed within 60 seconds of\r | |
1782 | // the reception of the first-arriving fragment of that packet, the\r | |
1783 | // reassembly must be abandoned and all the fragments that have been\r | |
1784 | // received for that packet must be discarded.\r | |
1785 | //\r | |
1786 | RemoveEntryList (Entry);\r | |
1787 | Ip6FreeAssembleEntry (Assemble);\r | |
1788 | }\r | |
1789 | }\r | |
1790 | }\r | |
1791 | \r | |
1792 | NET_LIST_FOR_EACH (InstanceEntry, &IpSb->Children) {\r | |
1793 | IpInstance = NET_LIST_USER_STRUCT (InstanceEntry, IP6_PROTOCOL, Link);\r | |
1794 | \r | |
1795 | //\r | |
1796 | // Second, time out the assembled packets enqueued on each IP child.\r | |
1797 | //\r | |
1798 | NET_LIST_FOR_EACH_SAFE (Entry, Next, &IpInstance->Received) {\r | |
1799 | Packet = NET_LIST_USER_STRUCT (Entry, NET_BUF, List);\r | |
1800 | Info = IP6_GET_CLIP_INFO (Packet);\r | |
1801 | \r | |
1802 | if ((Info->Life > 0) && (--Info->Life == 0)) {\r | |
1803 | RemoveEntryList (Entry);\r | |
1804 | NetbufFree (Packet);\r | |
1805 | }\r | |
1806 | }\r | |
1807 | \r | |
1808 | //\r | |
1809 | // Third: time out the transmitted packets.\r | |
1810 | //\r | |
1811 | NetMapIterate (&IpInstance->TxTokens, Ip6SentPacketTicking, NULL);\r | |
1812 | }\r | |
1813 | }\r |