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1 | /** @file\r |
2 | IP6 internal functions to process the incoming packets.\r | |
3 | \r | |
94b928ca | 4 | Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>\r |
a3bcde70 HT |
5 | \r |
6 | This program and the accompanying materials\r | |
7 | are licensed and made available under the terms and conditions of the BSD License\r | |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php.\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #include "Ip6Impl.h"\r | |
17 | \r | |
18 | /**\r | |
19 | Create an empty assemble entry for the packet identified by\r | |
20 | (Dst, Src, Id). The default life for the packet is 60 seconds.\r | |
21 | \r | |
22 | @param[in] Dst The destination address.\r | |
23 | @param[in] Src The source address.\r | |
24 | @param[in] Id The ID field in the IP header.\r | |
25 | \r | |
26 | @return NULL if failed to allocate memory for the entry. Otherwise,\r | |
27 | the pointer to the just created reassemble entry.\r | |
28 | \r | |
29 | **/\r | |
30 | IP6_ASSEMBLE_ENTRY *\r | |
31 | Ip6CreateAssembleEntry (\r | |
32 | IN EFI_IPv6_ADDRESS *Dst,\r | |
33 | IN EFI_IPv6_ADDRESS *Src,\r | |
34 | IN UINT32 Id\r | |
35 | )\r | |
36 | {\r | |
37 | IP6_ASSEMBLE_ENTRY *Assemble;\r | |
38 | \r | |
39 | Assemble = AllocatePool (sizeof (IP6_ASSEMBLE_ENTRY));\r | |
40 | if (Assemble == NULL) {\r | |
41 | return NULL;\r | |
42 | }\r | |
43 | \r | |
44 | IP6_COPY_ADDRESS (&Assemble->Dst, Dst);\r | |
45 | IP6_COPY_ADDRESS (&Assemble->Src, Src);\r | |
46 | InitializeListHead (&Assemble->Fragments);\r | |
47 | \r | |
48 | Assemble->Id = Id;\r | |
49 | Assemble->Life = IP6_FRAGMENT_LIFE + 1;\r | |
50 | \r | |
51 | Assemble->TotalLen = 0;\r | |
52 | Assemble->CurLen = 0;\r | |
53 | Assemble->Head = NULL;\r | |
54 | Assemble->Info = NULL;\r | |
55 | Assemble->Packet = NULL;\r | |
56 | \r | |
57 | return Assemble;\r | |
58 | }\r | |
59 | \r | |
60 | /**\r | |
61 | Release all the fragments of a packet, then free the assemble entry.\r | |
62 | \r | |
63 | @param[in] Assemble The assemble entry to free.\r | |
64 | \r | |
65 | **/\r | |
66 | VOID\r | |
67 | Ip6FreeAssembleEntry (\r | |
68 | IN IP6_ASSEMBLE_ENTRY *Assemble\r | |
69 | )\r | |
70 | {\r | |
71 | LIST_ENTRY *Entry;\r | |
72 | LIST_ENTRY *Next;\r | |
73 | NET_BUF *Fragment;\r | |
74 | \r | |
75 | NET_LIST_FOR_EACH_SAFE (Entry, Next, &Assemble->Fragments) {\r | |
76 | Fragment = NET_LIST_USER_STRUCT (Entry, NET_BUF, List);\r | |
77 | \r | |
78 | RemoveEntryList (Entry);\r | |
79 | NetbufFree (Fragment);\r | |
80 | }\r | |
81 | \r | |
82 | if (Assemble->Packet != NULL) {\r | |
83 | NetbufFree (Assemble->Packet);\r | |
84 | }\r | |
85 | \r | |
86 | FreePool (Assemble);\r | |
87 | }\r | |
88 | \r | |
89 | /**\r | |
90 | Release all the fragments of the packet. This is the callback for\r | |
91 | the assembled packet's OnFree. It will free the assemble entry,\r | |
92 | which in turn frees all the fragments of the packet.\r | |
93 | \r | |
94 | @param[in] Arg The assemble entry to free.\r | |
95 | \r | |
96 | **/\r | |
97 | VOID\r | |
98 | EFIAPI\r | |
99 | Ip6OnFreeFragments (\r | |
100 | IN VOID *Arg\r | |
101 | )\r | |
102 | {\r | |
103 | Ip6FreeAssembleEntry ((IP6_ASSEMBLE_ENTRY *) Arg);\r | |
104 | }\r | |
105 | \r | |
106 | /**\r | |
107 | Trim the packet to fit in [Start, End), and update per the\r | |
108 | packet information.\r | |
109 | \r | |
110 | @param[in, out] Packet Packet to trim.\r | |
111 | @param[in] Start The sequence of the first byte to fit in.\r | |
112 | @param[in] End One beyond the sequence of last byte to fit in.\r | |
113 | \r | |
114 | **/\r | |
115 | VOID\r | |
116 | Ip6TrimPacket (\r | |
117 | IN OUT NET_BUF *Packet,\r | |
118 | IN INTN Start,\r | |
119 | IN INTN End\r | |
120 | )\r | |
121 | {\r | |
122 | IP6_CLIP_INFO *Info;\r | |
123 | INTN Len;\r | |
124 | \r | |
125 | Info = IP6_GET_CLIP_INFO (Packet);\r | |
126 | \r | |
127 | ASSERT (Info->Start + Info->Length == Info->End);\r | |
128 | ASSERT ((Info->Start < End) && (Start < Info->End));\r | |
129 | \r | |
130 | if (Info->Start < Start) {\r | |
131 | Len = Start - Info->Start;\r | |
132 | \r | |
133 | NetbufTrim (Packet, (UINT32) Len, NET_BUF_HEAD);\r | |
134 | Info->Start = (UINT32) Start;\r | |
135 | Info->Length -= (UINT32) Len;\r | |
136 | }\r | |
137 | \r | |
138 | if (End < Info->End) {\r | |
139 | Len = End - Info->End;\r | |
140 | \r | |
141 | NetbufTrim (Packet, (UINT32) Len, NET_BUF_TAIL);\r | |
142 | Info->End = (UINT32) End;\r | |
143 | Info->Length -= (UINT32) Len;\r | |
144 | }\r | |
145 | }\r | |
146 | \r | |
147 | /**\r | |
148 | Reassemble the IP fragments. If all the fragments of the packet\r | |
149 | have been received, it will wrap the packet in a net buffer then\r | |
150 | return it to caller. If the packet can't be assembled, NULL is\r | |
151 | returned.\r | |
152 | \r | |
153 | @param[in, out] Table The assemble table used. A new assemble entry will be created\r | |
154 | if the Packet is from a new chain of fragments.\r | |
155 | @param[in] Packet The fragment to assemble. It might be freed if the fragment\r | |
156 | can't be re-assembled.\r | |
157 | \r | |
158 | @return NULL if the packet can't be reassembled. The pointer to the just assembled\r | |
159 | packet if all the fragments of the packet have arrived.\r | |
160 | \r | |
161 | **/\r | |
162 | NET_BUF *\r | |
163 | Ip6Reassemble (\r | |
164 | IN OUT IP6_ASSEMBLE_TABLE *Table,\r | |
165 | IN NET_BUF *Packet\r | |
166 | )\r | |
167 | {\r | |
168 | EFI_IP6_HEADER *Head;\r | |
169 | IP6_CLIP_INFO *This;\r | |
170 | IP6_CLIP_INFO *Node;\r | |
171 | IP6_ASSEMBLE_ENTRY *Assemble;\r | |
172 | IP6_ASSEMBLE_ENTRY *Entry;\r | |
173 | LIST_ENTRY *ListHead;\r | |
174 | LIST_ENTRY *Prev;\r | |
175 | LIST_ENTRY *Cur;\r | |
176 | NET_BUF *Fragment;\r | |
177 | NET_BUF *TmpPacket;\r | |
178 | NET_BUF *NewPacket;\r | |
179 | NET_BUF *Duplicate;\r | |
180 | UINT8 *DupHead;\r | |
181 | INTN Index;\r | |
182 | UINT16 UnFragmentLen;\r | |
183 | UINT8 *NextHeader;\r | |
184 | \r | |
185 | Head = Packet->Ip.Ip6;\r | |
186 | This = IP6_GET_CLIP_INFO (Packet);\r | |
187 | \r | |
188 | ASSERT (Head != NULL);\r | |
189 | \r | |
190 | //\r | |
191 | // Find the corresponding assemble entry by (Dst, Src, Id)\r | |
192 | //\r | |
193 | Assemble = NULL;\r | |
194 | Index = IP6_ASSEMBLE_HASH (&Head->DestinationAddress, &Head->SourceAddress, This->Id);\r | |
195 | \r | |
196 | NET_LIST_FOR_EACH (Cur, &Table->Bucket[Index]) {\r | |
197 | Entry = NET_LIST_USER_STRUCT (Cur, IP6_ASSEMBLE_ENTRY, Link);\r | |
198 | \r | |
199 | if (Entry->Id == This->Id &&\r | |
200 | EFI_IP6_EQUAL (&Entry->Src, &Head->SourceAddress) &&\r | |
201 | EFI_IP6_EQUAL (&Entry->Dst, &Head->DestinationAddress)\r | |
202 | ) {\r | |
203 | Assemble = Entry;\r | |
204 | break;\r | |
205 | }\r | |
206 | }\r | |
207 | \r | |
208 | //\r | |
209 | // Create a new entry if can not find an existing one, insert it to assemble table\r | |
210 | //\r | |
211 | if (Assemble == NULL) {\r | |
212 | Assemble = Ip6CreateAssembleEntry (\r | |
213 | &Head->DestinationAddress,\r | |
214 | &Head->SourceAddress,\r | |
215 | This->Id\r | |
216 | );\r | |
217 | \r | |
218 | if (Assemble == NULL) {\r | |
219 | goto Error;\r | |
220 | }\r | |
221 | \r | |
222 | InsertHeadList (&Table->Bucket[Index], &Assemble->Link);\r | |
223 | }\r | |
224 | \r | |
225 | //\r | |
226 | // Find the point to insert the packet: before the first\r | |
227 | // fragment with THIS.Start < CUR.Start. the previous one\r | |
228 | // has PREV.Start <= THIS.Start < CUR.Start.\r | |
229 | //\r | |
230 | ListHead = &Assemble->Fragments;\r | |
231 | \r | |
232 | NET_LIST_FOR_EACH (Cur, ListHead) {\r | |
233 | Fragment = NET_LIST_USER_STRUCT (Cur, NET_BUF, List);\r | |
234 | \r | |
235 | if (This->Start < IP6_GET_CLIP_INFO (Fragment)->Start) {\r | |
236 | break;\r | |
237 | }\r | |
238 | }\r | |
239 | \r | |
240 | //\r | |
241 | // Check whether the current fragment overlaps with the previous one.\r | |
242 | // It holds that: PREV.Start <= THIS.Start < THIS.End. Only need to\r | |
243 | // check whether THIS.Start < PREV.End for overlap. If two fragments\r | |
244 | // overlaps, trim the overlapped part off THIS fragment.\r | |
245 | //\r | |
246 | if ((Cur != ListHead) && ((Prev = Cur->BackLink) != ListHead)) {\r | |
247 | Fragment = NET_LIST_USER_STRUCT (Prev, NET_BUF, List);\r | |
248 | Node = IP6_GET_CLIP_INFO (Fragment);\r | |
249 | \r | |
250 | if (This->Start < Node->End) {\r | |
251 | if (This->End <= Node->End) {\r | |
252 | goto Error;\r | |
253 | }\r | |
254 | \r | |
255 | //\r | |
256 | // Trim the previous fragment from tail.\r | |
257 | //\r | |
258 | Ip6TrimPacket (Fragment, Node->Start, This->Start);\r | |
259 | }\r | |
260 | }\r | |
261 | \r | |
262 | //\r | |
263 | // Insert the fragment into the packet. The fragment may be removed\r | |
264 | // from the list by the following checks.\r | |
265 | //\r | |
266 | NetListInsertBefore (Cur, &Packet->List);\r | |
267 | \r | |
268 | //\r | |
269 | // Check the packets after the insert point. It holds that:\r | |
270 | // THIS.Start <= NODE.Start < NODE.End. The equality holds\r | |
271 | // if PREV and NEXT are continuous. THIS fragment may fill\r | |
272 | // several holes. Remove the completely overlapped fragments\r | |
273 | //\r | |
274 | while (Cur != ListHead) {\r | |
275 | Fragment = NET_LIST_USER_STRUCT (Cur, NET_BUF, List);\r | |
276 | Node = IP6_GET_CLIP_INFO (Fragment);\r | |
277 | \r | |
278 | //\r | |
279 | // Remove fragments completely overlapped by this fragment\r | |
280 | //\r | |
281 | if (Node->End <= This->End) {\r | |
282 | Cur = Cur->ForwardLink;\r | |
283 | \r | |
284 | RemoveEntryList (&Fragment->List);\r | |
285 | Assemble->CurLen -= Node->Length;\r | |
286 | \r | |
287 | NetbufFree (Fragment);\r | |
288 | continue;\r | |
289 | }\r | |
290 | \r | |
291 | //\r | |
292 | // The conditions are: THIS.Start <= NODE.Start, and THIS.End <\r | |
293 | // NODE.End. Two fragments overlaps if NODE.Start < THIS.End.\r | |
294 | // If two fragments start at the same offset, remove THIS fragment\r | |
295 | // because ((THIS.Start == NODE.Start) && (THIS.End < NODE.End)).\r | |
296 | //\r | |
297 | if (Node->Start < This->End) {\r | |
298 | if (This->Start == Node->Start) {\r | |
299 | RemoveEntryList (&Packet->List);\r | |
300 | goto Error;\r | |
301 | }\r | |
302 | \r | |
303 | Ip6TrimPacket (Packet, This->Start, Node->Start);\r | |
304 | }\r | |
305 | \r | |
306 | break;\r | |
307 | }\r | |
308 | \r | |
309 | //\r | |
310 | // Update the assemble info: increase the current length. If it is\r | |
311 | // the frist fragment, update the packet's IP head and per packet\r | |
312 | // info. If it is the last fragment, update the total length.\r | |
313 | //\r | |
314 | Assemble->CurLen += This->Length;\r | |
315 | \r | |
316 | if (This->Start == 0) {\r | |
317 | //\r | |
318 | // Once the first fragment is enqueued, it can't be removed\r | |
319 | // from the fragment list. So, Assemble->Head always point\r | |
320 | // to valid memory area.\r | |
321 | //\r | |
322 | if ((Assemble->Head != NULL) || (Assemble->Packet != NULL)) {\r | |
323 | goto Error;\r | |
324 | }\r | |
325 | \r | |
326 | //\r | |
327 | // Backup the first fragment in case the reasembly of that packet fail.\r | |
328 | //\r | |
329 | Duplicate = NetbufDuplicate (Packet, NULL, sizeof (EFI_IP6_HEADER));\r | |
330 | if (Duplicate == NULL) {\r | |
331 | goto Error;\r | |
332 | }\r | |
333 | \r | |
334 | //\r | |
335 | // Revert IP head to network order.\r | |
336 | //\r | |
337 | DupHead = NetbufGetByte (Duplicate, 0, NULL);\r | |
338 | ASSERT (DupHead != NULL);\r | |
339 | Duplicate->Ip.Ip6 = Ip6NtohHead ((EFI_IP6_HEADER *) DupHead);\r | |
340 | Assemble->Packet = Duplicate;\r | |
341 | \r | |
342 | //\r | |
343 | // Adjust the unfragmentable part in first fragment\r | |
344 | //\r | |
345 | UnFragmentLen = (UINT16) (This->HeadLen - sizeof (EFI_IP6_HEADER));\r | |
346 | if (UnFragmentLen == 0) {\r | |
347 | //\r | |
348 | // There is not any unfragmentable extension header.\r | |
349 | //\r | |
350 | ASSERT (Head->NextHeader == IP6_FRAGMENT);\r | |
351 | Head->NextHeader = This->NextHeader;\r | |
352 | } else {\r | |
353 | NextHeader = NetbufGetByte (\r | |
354 | Packet,\r | |
355 | This->FormerNextHeader + sizeof (EFI_IP6_HEADER),\r | |
356 | 0\r | |
357 | );\r | |
358 | if (NextHeader == NULL) {\r | |
359 | goto Error;\r | |
360 | }\r | |
361 | \r | |
362 | *NextHeader = This->NextHeader;\r | |
363 | }\r | |
364 | \r | |
365 | Assemble->Head = Head;\r | |
366 | Assemble->Info = IP6_GET_CLIP_INFO (Packet);\r | |
367 | }\r | |
368 | \r | |
369 | //\r | |
370 | // Don't update the length more than once.\r | |
371 | //\r | |
372 | if ((This->LastFrag != 0) && (Assemble->TotalLen == 0)) {\r | |
373 | Assemble->TotalLen = This->End;\r | |
374 | }\r | |
375 | \r | |
376 | //\r | |
377 | // Deliver the whole packet if all the fragments received.\r | |
378 | // All fragments received if:\r | |
379 | // 1. received the last one, so, the totoal length is know\r | |
380 | // 2. received all the data. If the last fragment on the\r | |
381 | // queue ends at the total length, all data is received.\r | |
382 | //\r | |
383 | if ((Assemble->TotalLen != 0) && (Assemble->CurLen >= Assemble->TotalLen)) {\r | |
384 | \r | |
385 | RemoveEntryList (&Assemble->Link);\r | |
386 | \r | |
387 | //\r | |
388 | // If the packet is properly formated, the last fragment's End\r | |
389 | // equals to the packet's total length. Otherwise, the packet\r | |
390 | // is a fake, drop it now.\r | |
391 | //\r | |
392 | Fragment = NET_LIST_USER_STRUCT (ListHead->BackLink, NET_BUF, List);\r | |
393 | if (IP6_GET_CLIP_INFO (Fragment)->End != (INTN) Assemble->TotalLen) {\r | |
394 | Ip6FreeAssembleEntry (Assemble);\r | |
395 | goto Error;\r | |
396 | }\r | |
397 | \r | |
398 | Fragment = NET_LIST_HEAD (ListHead, NET_BUF, List);\r | |
399 | This = Assemble->Info;\r | |
400 | \r | |
401 | //\r | |
402 | // This TmpPacket is used to hold the unfragmentable part, i.e.,\r | |
403 | // the IPv6 header and the unfragmentable extension headers. Be noted that\r | |
404 | // the Fragment Header is exluded.\r | |
405 | //\r | |
406 | TmpPacket = NetbufGetFragment (Fragment, 0, This->HeadLen, 0);\r | |
407 | ASSERT (TmpPacket != NULL);\r | |
408 | \r | |
409 | NET_LIST_FOR_EACH (Cur, ListHead) {\r | |
410 | //\r | |
411 | // Trim off the unfragment part plus the fragment header from all fragments.\r | |
412 | //\r | |
413 | Fragment = NET_LIST_USER_STRUCT (Cur, NET_BUF, List);\r | |
414 | NetbufTrim (Fragment, This->HeadLen + sizeof (IP6_FRAGMENT_HEADER), TRUE);\r | |
415 | }\r | |
416 | \r | |
417 | InsertHeadList (ListHead, &TmpPacket->List);\r | |
418 | \r | |
419 | //\r | |
420 | // Wrap the packet in a net buffer then deliver it up\r | |
421 | //\r | |
422 | NewPacket = NetbufFromBufList (\r | |
423 | &Assemble->Fragments,\r | |
424 | 0,\r | |
425 | 0,\r | |
426 | Ip6OnFreeFragments,\r | |
427 | Assemble\r | |
428 | );\r | |
429 | \r | |
430 | if (NewPacket == NULL) {\r | |
431 | Ip6FreeAssembleEntry (Assemble);\r | |
432 | goto Error;\r | |
433 | }\r | |
434 | \r | |
435 | NewPacket->Ip.Ip6 = Assemble->Head;\r | |
436 | \r | |
437 | CopyMem (IP6_GET_CLIP_INFO (NewPacket), Assemble->Info, sizeof (IP6_CLIP_INFO));\r | |
438 | \r | |
439 | return NewPacket;\r | |
440 | }\r | |
441 | \r | |
442 | return NULL;\r | |
443 | \r | |
444 | Error:\r | |
445 | NetbufFree (Packet);\r | |
446 | return NULL;\r | |
447 | }\r | |
448 | \r | |
449 | \r | |
450 | /**\r | |
451 | The callback function for the net buffer that wraps the packet processed by\r | |
452 | IPsec. It releases the wrap packet and also signals IPsec to free the resources.\r | |
453 | \r | |
454 | @param[in] Arg The wrap context.\r | |
455 | \r | |
456 | **/\r | |
457 | VOID\r | |
458 | EFIAPI\r | |
459 | Ip6IpSecFree (\r | |
460 | IN VOID *Arg\r | |
461 | )\r | |
462 | {\r | |
463 | IP6_IPSEC_WRAP *Wrap;\r | |
464 | \r | |
465 | Wrap = (IP6_IPSEC_WRAP *) Arg;\r | |
466 | \r | |
467 | if (Wrap->IpSecRecycleSignal != NULL) {\r | |
468 | gBS->SignalEvent (Wrap->IpSecRecycleSignal);\r | |
469 | }\r | |
470 | \r | |
471 | NetbufFree (Wrap->Packet);\r | |
472 | \r | |
473 | FreePool (Wrap);\r | |
474 | \r | |
475 | return;\r | |
476 | }\r | |
477 | \r | |
478 | /**\r | |
479 | The work function to locate the IPsec protocol to process the inbound or\r | |
480 | outbound IP packets. The process routine handles the packet with the following\r | |
481 | actions: bypass the packet, discard the packet, or protect the packet.\r | |
482 | \r | |
483 | @param[in] IpSb The IP6 service instance.\r | |
68d3f2fb | 484 | @param[in, out] Head The caller-supplied IP6 header.\r |
a3bcde70 HT |
485 | @param[in, out] LastHead The next header field of last IP header.\r |
486 | @param[in, out] Netbuf The IP6 packet to be processed by IPsec.\r | |
68d3f2fb | 487 | @param[in, out] ExtHdrs The caller-supplied options.\r |
488 | @param[in, out] ExtHdrsLen The length of the option.\r | |
a3bcde70 HT |
489 | @param[in] Direction The directionality in an SPD entry,\r |
490 | EfiIPsecInBound, or EfiIPsecOutBound.\r | |
491 | @param[in] Context The token's wrap.\r | |
492 | \r | |
493 | @retval EFI_SUCCESS The IPsec protocol is not available or disabled.\r | |
494 | @retval EFI_SUCCESS The packet was bypassed, and all buffers remain the same.\r | |
495 | @retval EFI_SUCCESS The packet was protected.\r | |
496 | @retval EFI_ACCESS_DENIED The packet was discarded.\r | |
497 | @retval EFI_OUT_OF_RESOURCES There are not suffcient resources to complete the operation.\r | |
498 | @retval EFI_BUFFER_TOO_SMALL The number of non-empty blocks is bigger than the\r | |
499 | number of input data blocks when building a fragment table.\r | |
500 | \r | |
501 | **/\r | |
502 | EFI_STATUS\r | |
503 | Ip6IpSecProcessPacket (\r | |
68d3f2fb | 504 | IN IP6_SERVICE *IpSb,\r |
505 | IN OUT EFI_IP6_HEADER **Head,\r | |
506 | IN OUT UINT8 *LastHead,\r | |
507 | IN OUT NET_BUF **Netbuf,\r | |
508 | IN OUT UINT8 **ExtHdrs,\r | |
509 | IN OUT UINT32 *ExtHdrsLen,\r | |
510 | IN EFI_IPSEC_TRAFFIC_DIR Direction,\r | |
511 | IN VOID *Context\r | |
a3bcde70 HT |
512 | )\r |
513 | {\r | |
514 | NET_FRAGMENT *FragmentTable;\r | |
68d3f2fb | 515 | NET_FRAGMENT *OriginalFragmentTable;\r |
a3bcde70 | 516 | UINT32 FragmentCount;\r |
68d3f2fb | 517 | UINT32 OriginalFragmentCount;\r |
a3bcde70 HT |
518 | EFI_EVENT RecycleEvent;\r |
519 | NET_BUF *Packet;\r | |
520 | IP6_TXTOKEN_WRAP *TxWrap;\r | |
521 | IP6_IPSEC_WRAP *IpSecWrap;\r | |
522 | EFI_STATUS Status;\r | |
523 | EFI_IP6_HEADER *PacketHead;\r | |
524 | UINT8 *Buf;\r | |
68d3f2fb | 525 | EFI_IP6_HEADER ZeroHead;\r |
a3bcde70 HT |
526 | \r |
527 | Status = EFI_SUCCESS;\r | |
528 | Packet = *Netbuf;\r | |
529 | RecycleEvent = NULL;\r | |
530 | IpSecWrap = NULL;\r | |
531 | FragmentTable = NULL;\r | |
532 | PacketHead = NULL;\r | |
533 | Buf = NULL;\r | |
534 | TxWrap = (IP6_TXTOKEN_WRAP *) Context;\r | |
535 | FragmentCount = Packet->BlockOpNum;\r | |
68d3f2fb | 536 | ZeroMem (&ZeroHead, sizeof (EFI_IP6_HEADER));\r |
a3bcde70 HT |
537 | \r |
538 | if (mIpSec == NULL) {\r | |
0a7294f7 | 539 | gBS->LocateProtocol (&gEfiIpSec2ProtocolGuid, NULL, (VOID **) &mIpSec);\r |
a3bcde70 HT |
540 | \r |
541 | //\r | |
542 | // Check whether the ipsec protocol is available.\r | |
543 | //\r | |
544 | if (mIpSec == NULL) {\r | |
545 | goto ON_EXIT;\r | |
546 | }\r | |
547 | }\r | |
548 | \r | |
549 | //\r | |
550 | // Check whether the ipsec enable variable is set.\r | |
551 | //\r | |
552 | if (mIpSec->DisabledFlag) {\r | |
553 | //\r | |
554 | // If IPsec is disabled, restore the original MTU\r | |
555 | //\r | |
556 | IpSb->MaxPacketSize = IpSb->OldMaxPacketSize;\r | |
557 | goto ON_EXIT;\r | |
558 | } else {\r | |
559 | //\r | |
560 | // If IPsec is enabled, use the MTU which reduce the IPsec header length.\r | |
561 | //\r | |
562 | IpSb->MaxPacketSize = IpSb->OldMaxPacketSize - IP6_MAX_IPSEC_HEADLEN;\r | |
563 | }\r | |
564 | \r | |
565 | \r | |
566 | //\r | |
567 | // Bypass all multicast inbound or outbound traffic.\r | |
568 | //\r | |
68d3f2fb | 569 | if (IP6_IS_MULTICAST (&(*Head)->DestinationAddress) || IP6_IS_MULTICAST (&(*Head)->SourceAddress)) {\r |
a3bcde70 HT |
570 | goto ON_EXIT;\r |
571 | }\r | |
572 | \r | |
573 | //\r | |
574 | // Rebuild fragment table from netbuf to ease ipsec process.\r | |
575 | //\r | |
576 | FragmentTable = AllocateZeroPool (FragmentCount * sizeof (NET_FRAGMENT));\r | |
577 | \r | |
578 | if (FragmentTable == NULL) {\r | |
579 | Status = EFI_OUT_OF_RESOURCES;\r | |
580 | goto ON_EXIT;\r | |
581 | }\r | |
582 | \r | |
583 | Status = NetbufBuildExt (Packet, FragmentTable, &FragmentCount);\r | |
68d3f2fb | 584 | OriginalFragmentTable = FragmentTable;\r |
585 | OriginalFragmentCount = FragmentCount;\r | |
a3bcde70 HT |
586 | \r |
587 | if (EFI_ERROR(Status)) {\r | |
588 | FreePool (FragmentTable);\r | |
589 | goto ON_EXIT;\r | |
590 | }\r | |
591 | \r | |
592 | //\r | |
593 | // Convert host byte order to network byte order\r | |
594 | //\r | |
68d3f2fb | 595 | Ip6NtohHead (*Head);\r |
a3bcde70 | 596 | \r |
68d3f2fb | 597 | Status = mIpSec->ProcessExt (\r |
a3bcde70 HT |
598 | mIpSec,\r |
599 | IpSb->Controller,\r | |
600 | IP_VERSION_6,\r | |
68d3f2fb | 601 | (VOID *) (*Head),\r |
a3bcde70 | 602 | LastHead,\r |
68d3f2fb | 603 | (VOID **) ExtHdrs,\r |
604 | ExtHdrsLen,\r | |
a3bcde70 HT |
605 | (EFI_IPSEC_FRAGMENT_DATA **) (&FragmentTable),\r |
606 | &FragmentCount,\r | |
607 | Direction,\r | |
608 | &RecycleEvent\r | |
609 | );\r | |
610 | //\r | |
611 | // Convert back to host byte order\r | |
612 | //\r | |
68d3f2fb | 613 | Ip6NtohHead (*Head);\r |
a3bcde70 HT |
614 | \r |
615 | if (EFI_ERROR (Status)) {\r | |
94b928ca | 616 | FreePool (OriginalFragmentTable);\r |
a3bcde70 HT |
617 | goto ON_EXIT;\r |
618 | }\r | |
619 | \r | |
68d3f2fb | 620 | if (OriginalFragmentCount == FragmentCount && OriginalFragmentTable == FragmentTable) {\r |
621 | //\r | |
622 | // For ByPass Packet\r | |
623 | //\r | |
94b928ca | 624 | FreePool (FragmentTable);\r |
68d3f2fb | 625 | goto ON_EXIT;\r |
94b928ca | 626 | } else {\r |
627 | //\r | |
628 | // Free the FragmentTable which allocated before calling the IPsec.\r | |
629 | //\r | |
630 | FreePool (OriginalFragmentTable);\r | |
68d3f2fb | 631 | }\r |
a3bcde70 | 632 | \r |
68d3f2fb | 633 | if (Direction == EfiIPsecOutBound && TxWrap != NULL) {\r |
a3bcde70 HT |
634 | TxWrap->IpSecRecycleSignal = RecycleEvent;\r |
635 | TxWrap->Packet = NetbufFromExt (\r | |
636 | FragmentTable,\r | |
637 | FragmentCount,\r | |
638 | IP6_MAX_HEADLEN,\r | |
639 | 0,\r | |
640 | Ip6FreeTxToken,\r | |
641 | TxWrap\r | |
642 | );\r | |
643 | if (TxWrap->Packet == NULL) {\r | |
94b928ca | 644 | TxWrap->Packet = *Netbuf;\r |
a3bcde70 HT |
645 | Status = EFI_OUT_OF_RESOURCES;\r |
646 | goto ON_EXIT;\r | |
647 | }\r | |
648 | \r | |
68d3f2fb | 649 | CopyMem (\r |
650 | IP6_GET_CLIP_INFO (TxWrap->Packet),\r | |
651 | IP6_GET_CLIP_INFO (Packet),\r | |
652 | sizeof (IP6_CLIP_INFO)\r | |
653 | );\r | |
654 | \r | |
655 | NetIpSecNetbufFree(Packet);\r | |
a3bcde70 HT |
656 | *Netbuf = TxWrap->Packet;\r |
657 | \r | |
658 | } else {\r | |
659 | \r | |
660 | IpSecWrap = AllocateZeroPool (sizeof (IP6_IPSEC_WRAP));\r | |
661 | \r | |
662 | if (IpSecWrap == NULL) {\r | |
94b928ca | 663 | Status = EFI_OUT_OF_RESOURCES;\r |
664 | gBS->SignalEvent (RecycleEvent);\r | |
a3bcde70 HT |
665 | goto ON_EXIT;\r |
666 | }\r | |
667 | \r | |
668 | IpSecWrap->IpSecRecycleSignal = RecycleEvent;\r | |
669 | IpSecWrap->Packet = Packet;\r | |
670 | Packet = NetbufFromExt (\r | |
671 | FragmentTable,\r | |
672 | FragmentCount,\r | |
673 | IP6_MAX_HEADLEN,\r | |
674 | 0,\r | |
675 | Ip6IpSecFree,\r | |
676 | IpSecWrap\r | |
677 | );\r | |
678 | \r | |
679 | if (Packet == NULL) {\r | |
94b928ca | 680 | Packet = IpSecWrap->Packet;\r |
681 | gBS->SignalEvent (RecycleEvent);\r | |
682 | FreePool (IpSecWrap);\r | |
a3bcde70 HT |
683 | Status = EFI_OUT_OF_RESOURCES;\r |
684 | goto ON_EXIT;\r | |
685 | }\r | |
686 | \r | |
68d3f2fb | 687 | if (Direction == EfiIPsecInBound && 0 != CompareMem (&ZeroHead, *Head, sizeof (EFI_IP6_HEADER))) {\r |
a3bcde70 HT |
688 | \r |
689 | PacketHead = (EFI_IP6_HEADER *) NetbufAllocSpace (\r | |
690 | Packet,\r | |
68d3f2fb | 691 | sizeof (EFI_IP6_HEADER) + *ExtHdrsLen,\r |
a3bcde70 HT |
692 | NET_BUF_HEAD\r |
693 | );\r | |
694 | if (PacketHead == NULL) {\r | |
94b928ca | 695 | *Netbuf = Packet;\r |
696 | Status = EFI_OUT_OF_RESOURCES;\r | |
a3bcde70 HT |
697 | goto ON_EXIT;\r |
698 | }\r | |
699 | \r | |
68d3f2fb | 700 | CopyMem (PacketHead, *Head, sizeof (EFI_IP6_HEADER));\r |
701 | *Head = PacketHead;\r | |
a3bcde70 HT |
702 | Packet->Ip.Ip6 = PacketHead;\r |
703 | \r | |
68d3f2fb | 704 | if (*ExtHdrs != NULL) {\r |
a3bcde70 | 705 | Buf = (UINT8 *) (PacketHead + 1);\r |
68d3f2fb | 706 | CopyMem (Buf, *ExtHdrs, *ExtHdrsLen);\r |
a3bcde70 HT |
707 | }\r |
708 | \r | |
68d3f2fb | 709 | NetbufTrim (Packet, sizeof (EFI_IP6_HEADER) + *ExtHdrsLen, TRUE);\r |
a3bcde70 HT |
710 | CopyMem (\r |
711 | IP6_GET_CLIP_INFO (Packet),\r | |
712 | IP6_GET_CLIP_INFO (IpSecWrap->Packet),\r | |
713 | sizeof (IP6_CLIP_INFO)\r | |
714 | );\r | |
715 | }\r | |
a3bcde70 HT |
716 | *Netbuf = Packet;\r |
717 | }\r | |
718 | \r | |
719 | ON_EXIT:\r | |
720 | return Status;\r | |
721 | }\r | |
722 | \r | |
723 | /**\r | |
68d3f2fb | 724 | Pre-process the IPv6 packet. First validates the IPv6 packet, and\r |
725 | then reassembles packet if it is necessary.\r | |
726 | \r | |
727 | @param[in] IpSb The IP6 service instance.\r | |
728 | @param[in, out] Packet The received IP6 packet to be processed.\r | |
729 | @param[in] Flag The link layer flag for the packet received, such\r | |
730 | as multicast.\r | |
731 | @param[out] Payload The pointer to the payload of the recieved packet. \r | |
732 | it starts from the first byte of the extension header. \r | |
733 | @param[out] LastHead The pointer of NextHeader of the last extension\r | |
734 | header processed by IP6.\r | |
735 | @param[out] ExtHdrsLen The length of the whole option.\r | |
736 | @param[out] UnFragmentLen The length of unfragmented length of extension headers.\r | |
737 | @param[out] Fragmented Indicate whether the packet is fragmented. \r | |
738 | @param[out] Head The pointer to the EFI_IP6_Header.\r | |
739 | \r | |
740 | @retval EFI_SUCCESS The received packet is well format.\r | |
741 | @retval EFI_INVALID_PARAMETER The received packet is malformed.\r | |
a3bcde70 HT |
742 | \r |
743 | **/\r | |
68d3f2fb | 744 | EFI_STATUS\r |
745 | Ip6PreProcessPacket (\r | |
746 | IN IP6_SERVICE *IpSb,\r | |
747 | IN OUT NET_BUF **Packet,\r | |
748 | IN UINT32 Flag,\r | |
749 | OUT UINT8 **Payload,\r | |
750 | OUT UINT8 **LastHead,\r | |
751 | OUT UINT32 *ExtHdrsLen,\r | |
752 | OUT UINT32 *UnFragmentLen,\r | |
753 | OUT BOOLEAN *Fragmented, \r | |
754 | OUT EFI_IP6_HEADER **Head\r | |
a3bcde70 HT |
755 | )\r |
756 | {\r | |
a3bcde70 | 757 | UINT16 PayloadLen;\r |
a3bcde70 | 758 | UINT16 TotalLen;\r |
a3bcde70 | 759 | UINT32 FormerHeadOffset;\r |
a3bcde70 | 760 | UINT32 HeadLen;\r |
a3bcde70 HT |
761 | IP6_FRAGMENT_HEADER *FragmentHead;\r |
762 | UINT16 FragmentOffset;\r | |
68d3f2fb | 763 | IP6_CLIP_INFO *Info;\r |
a3bcde70 HT |
764 | EFI_IPv6_ADDRESS Loopback;\r |
765 | \r | |
68d3f2fb | 766 | HeadLen = 0;\r |
767 | PayloadLen = 0;\r | |
a3bcde70 HT |
768 | //\r |
769 | // Check whether the input packet is a valid packet\r | |
770 | //\r | |
68d3f2fb | 771 | if ((*Packet)->TotalSize < IP6_MIN_HEADLEN) {\r |
772 | return EFI_INVALID_PARAMETER;\r | |
a3bcde70 HT |
773 | }\r |
774 | \r | |
775 | //\r | |
776 | // Get header information of the packet.\r | |
777 | //\r | |
68d3f2fb | 778 | *Head = (EFI_IP6_HEADER *) NetbufGetByte (*Packet, 0, NULL);\r |
779 | if (*Head == NULL) {\r | |
780 | return EFI_INVALID_PARAMETER;\r | |
a3bcde70 HT |
781 | }\r |
782 | \r | |
783 | //\r | |
784 | // Multicast addresses must not be used as source addresses in IPv6 packets.\r | |
785 | //\r | |
68d3f2fb | 786 | if (((*Head)->Version != 6) || (IP6_IS_MULTICAST (&(*Head)->SourceAddress))) {\r |
787 | return EFI_INVALID_PARAMETER;\r | |
a3bcde70 HT |
788 | }\r |
789 | \r | |
790 | //\r | |
791 | // A packet with a destination address of loopback ::1/128 or unspecified must be dropped.\r | |
792 | //\r | |
793 | ZeroMem (&Loopback, sizeof (EFI_IPv6_ADDRESS));\r | |
794 | Loopback.Addr[15] = 0x1;\r | |
68d3f2fb | 795 | if ((CompareMem (&Loopback, &(*Head)->DestinationAddress, sizeof (EFI_IPv6_ADDRESS)) == 0) ||\r |
796 | (NetIp6IsUnspecifiedAddr (&(*Head)->DestinationAddress))) {\r | |
797 | return EFI_INVALID_PARAMETER;\r | |
a3bcde70 HT |
798 | }\r |
799 | \r | |
800 | //\r | |
801 | // Convert the IP header to host byte order.\r | |
802 | //\r | |
68d3f2fb | 803 | (*Packet)->Ip.Ip6 = Ip6NtohHead (*Head);\r |
a3bcde70 HT |
804 | \r |
805 | //\r | |
806 | // Get the per packet info.\r | |
807 | //\r | |
68d3f2fb | 808 | Info = IP6_GET_CLIP_INFO (*Packet);\r |
a3bcde70 HT |
809 | Info->LinkFlag = Flag;\r |
810 | Info->CastType = 0;\r | |
811 | \r | |
812 | if (IpSb->MnpConfigData.EnablePromiscuousReceive) {\r | |
813 | Info->CastType = Ip6Promiscuous;\r | |
814 | }\r | |
815 | \r | |
68d3f2fb | 816 | if (Ip6IsOneOfSetAddress (IpSb, &(*Head)->DestinationAddress, NULL, NULL)) {\r |
a3bcde70 | 817 | Info->CastType = Ip6Unicast;\r |
68d3f2fb | 818 | } else if (IP6_IS_MULTICAST (&(*Head)->DestinationAddress)) {\r |
819 | if (Ip6FindMldEntry (IpSb, &(*Head)->DestinationAddress) != NULL) {\r | |
a3bcde70 HT |
820 | Info->CastType = Ip6Multicast;\r |
821 | }\r | |
822 | }\r | |
823 | \r | |
824 | //\r | |
825 | // Drop the packet that is not delivered to us.\r | |
826 | //\r | |
827 | if (Info->CastType == 0) {\r | |
68d3f2fb | 828 | return EFI_INVALID_PARAMETER;\r |
a3bcde70 HT |
829 | }\r |
830 | \r | |
831 | \r | |
68d3f2fb | 832 | PayloadLen = (*Head)->PayloadLength;\r |
a3bcde70 HT |
833 | \r |
834 | Info->Start = 0;\r | |
835 | Info->Length = PayloadLen;\r | |
836 | Info->End = Info->Start + Info->Length;\r | |
837 | Info->HeadLen = (UINT16) sizeof (EFI_IP6_HEADER);\r | |
838 | Info->Status = EFI_SUCCESS;\r | |
839 | Info->LastFrag = FALSE;\r | |
840 | \r | |
841 | TotalLen = (UINT16) (PayloadLen + sizeof (EFI_IP6_HEADER));\r | |
842 | \r | |
843 | //\r | |
844 | // Mnp may deliver frame trailer sequence up, trim it off.\r | |
845 | //\r | |
68d3f2fb | 846 | if (TotalLen < (*Packet)->TotalSize) {\r |
847 | NetbufTrim (*Packet, (*Packet)->TotalSize - TotalLen, FALSE);\r | |
a3bcde70 HT |
848 | }\r |
849 | \r | |
68d3f2fb | 850 | if (TotalLen != (*Packet)->TotalSize) {\r |
851 | return EFI_INVALID_PARAMETER;\r | |
a3bcde70 HT |
852 | }\r |
853 | \r | |
854 | //\r | |
855 | // Check the extension headers, if exist validate them\r | |
856 | //\r | |
857 | if (PayloadLen != 0) {\r | |
68d3f2fb | 858 | *Payload = AllocatePool ((UINTN) PayloadLen);\r |
859 | if (*Payload == NULL) {\r | |
860 | return EFI_INVALID_PARAMETER;\r | |
a3bcde70 HT |
861 | }\r |
862 | \r | |
68d3f2fb | 863 | NetbufCopy (*Packet, sizeof (EFI_IP6_HEADER), PayloadLen, *Payload);\r |
a3bcde70 HT |
864 | }\r |
865 | \r | |
a3bcde70 HT |
866 | if (!Ip6IsExtsValid (\r |
867 | IpSb,\r | |
68d3f2fb | 868 | *Packet,\r |
869 | &(*Head)->NextHeader,\r | |
870 | *Payload,\r | |
a3bcde70 HT |
871 | (UINT32) PayloadLen,\r |
872 | TRUE,\r | |
873 | &FormerHeadOffset,\r | |
68d3f2fb | 874 | LastHead,\r |
875 | ExtHdrsLen,\r | |
876 | UnFragmentLen,\r | |
877 | Fragmented\r | |
a3bcde70 | 878 | )) {\r |
68d3f2fb | 879 | return EFI_INVALID_PARAMETER;\r |
a3bcde70 HT |
880 | }\r |
881 | \r | |
68d3f2fb | 882 | HeadLen = sizeof (EFI_IP6_HEADER) + *UnFragmentLen;\r |
a3bcde70 | 883 | \r |
68d3f2fb | 884 | if (*Fragmented) {\r |
a3bcde70 HT |
885 | //\r |
886 | // Get the fragment offset from the Fragment header\r | |
887 | //\r | |
68d3f2fb | 888 | FragmentHead = (IP6_FRAGMENT_HEADER *) NetbufGetByte (*Packet, HeadLen, NULL);\r |
a3bcde70 | 889 | if (FragmentHead == NULL) {\r |
68d3f2fb | 890 | return EFI_INVALID_PARAMETER;\r |
a3bcde70 HT |
891 | }\r |
892 | \r | |
893 | FragmentOffset = NTOHS (FragmentHead->FragmentOffset);\r | |
894 | \r | |
895 | if ((FragmentOffset & 0x1) == 0) {\r | |
896 | Info->LastFrag = TRUE;\r | |
897 | }\r | |
898 | \r | |
899 | FragmentOffset &= (~0x1);\r | |
900 | \r | |
901 | //\r | |
902 | // This is the first fragment of the packet\r | |
903 | //\r | |
904 | if (FragmentOffset == 0) {\r | |
905 | Info->NextHeader = FragmentHead->NextHeader;\r | |
906 | }\r | |
907 | \r | |
908 | Info->HeadLen = (UINT16) HeadLen;\r | |
909 | HeadLen += sizeof (IP6_FRAGMENT_HEADER);\r | |
910 | Info->Start = FragmentOffset;\r | |
911 | Info->Length = TotalLen - (UINT16) HeadLen;\r | |
912 | Info->End = Info->Start + Info->Length;\r | |
913 | Info->Id = FragmentHead->Identification;\r | |
914 | Info->FormerNextHeader = FormerHeadOffset;\r | |
915 | \r | |
916 | //\r | |
917 | // Fragments should in the unit of 8 octets long except the last one.\r | |
918 | //\r | |
919 | if ((Info->LastFrag == 0) && (Info->Length % 8 != 0)) {\r | |
68d3f2fb | 920 | return EFI_INVALID_PARAMETER;\r |
a3bcde70 HT |
921 | }\r |
922 | \r | |
923 | //\r | |
924 | // Reassemble the packet.\r | |
925 | //\r | |
68d3f2fb | 926 | *Packet = Ip6Reassemble (&IpSb->Assemble, *Packet);\r |
927 | if (*Packet == NULL) {\r | |
928 | return EFI_INVALID_PARAMETER;\r | |
a3bcde70 HT |
929 | }\r |
930 | \r | |
931 | //\r | |
932 | // Re-check the assembled packet to get the right values.\r | |
933 | //\r | |
68d3f2fb | 934 | *Head = (*Packet)->Ip.Ip6;\r |
935 | PayloadLen = (*Head)->PayloadLength;\r | |
a3bcde70 | 936 | if (PayloadLen != 0) {\r |
68d3f2fb | 937 | if (*Payload != NULL) {\r |
938 | FreePool (*Payload);\r | |
a3bcde70 HT |
939 | }\r |
940 | \r | |
68d3f2fb | 941 | *Payload = AllocatePool ((UINTN) PayloadLen);\r |
942 | if (*Payload == NULL) {\r | |
943 | return EFI_INVALID_PARAMETER;\r | |
a3bcde70 HT |
944 | }\r |
945 | \r | |
68d3f2fb | 946 | NetbufCopy (*Packet, sizeof (EFI_IP6_HEADER), PayloadLen, *Payload);\r |
a3bcde70 HT |
947 | }\r |
948 | \r | |
949 | if (!Ip6IsExtsValid (\r | |
950 | IpSb,\r | |
68d3f2fb | 951 | *Packet,\r |
952 | &(*Head)->NextHeader,\r | |
953 | *Payload,\r | |
a3bcde70 HT |
954 | (UINT32) PayloadLen,\r |
955 | TRUE,\r | |
956 | NULL,\r | |
68d3f2fb | 957 | LastHead,\r |
958 | ExtHdrsLen,\r | |
959 | UnFragmentLen,\r | |
960 | Fragmented\r | |
a3bcde70 | 961 | )) {\r |
68d3f2fb | 962 | return EFI_INVALID_PARAMETER;\r |
a3bcde70 HT |
963 | }\r |
964 | }\r | |
965 | \r | |
966 | //\r | |
967 | // Trim the head off, after this point, the packet is headless.\r | |
968 | // and Packet->TotalLen == Info->Length.\r | |
969 | //\r | |
68d3f2fb | 970 | NetbufTrim (*Packet, sizeof (EFI_IP6_HEADER) + *ExtHdrsLen, TRUE);\r |
971 | \r | |
972 | return EFI_SUCCESS;\r | |
973 | }\r | |
974 | \r | |
975 | /**\r | |
976 | The IP6 input routine. It is called by the IP6_INTERFACE when an\r | |
977 | IP6 fragment is received from MNP.\r | |
978 | \r | |
979 | @param[in] Packet The IP6 packet received.\r | |
980 | @param[in] IoStatus The return status of receive request.\r | |
981 | @param[in] Flag The link layer flag for the packet received, such\r | |
982 | as multicast.\r | |
983 | @param[in] Context The IP6 service instance that owns the MNP.\r | |
a3bcde70 | 984 | \r |
68d3f2fb | 985 | **/\r |
986 | VOID\r | |
987 | Ip6AcceptFrame (\r | |
988 | IN NET_BUF *Packet,\r | |
989 | IN EFI_STATUS IoStatus,\r | |
990 | IN UINT32 Flag,\r | |
991 | IN VOID *Context\r | |
992 | )\r | |
993 | {\r | |
994 | IP6_SERVICE *IpSb;\r | |
995 | EFI_IP6_HEADER *Head;\r | |
996 | UINT8 *Payload;\r | |
997 | UINT8 *LastHead;\r | |
998 | UINT32 UnFragmentLen;\r | |
999 | UINT32 ExtHdrsLen;\r | |
1000 | BOOLEAN Fragmented;\r | |
1001 | EFI_STATUS Status;\r | |
1002 | EFI_IP6_HEADER ZeroHead;\r | |
1003 | \r | |
1004 | IpSb = (IP6_SERVICE *) Context;\r | |
1005 | NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);\r | |
1006 | \r | |
1007 | Payload = NULL;\r | |
1008 | LastHead = NULL;\r | |
1009 | \r | |
1010 | //\r | |
1011 | // Check input parameters\r | |
1012 | //\r | |
1013 | if (EFI_ERROR (IoStatus) || (IpSb->State == IP6_SERVICE_DESTROY)) {\r | |
1014 | goto Drop;\r | |
1015 | }\r | |
1016 | \r | |
1017 | //\r | |
1018 | // Pre-Process the Ipv6 Packet and then reassemble if it is necessary.\r | |
1019 | //\r | |
1020 | Status = Ip6PreProcessPacket (\r | |
1021 | IpSb, \r | |
1022 | &Packet, \r | |
1023 | Flag, \r | |
1024 | &Payload, \r | |
1025 | &LastHead, \r | |
1026 | &ExtHdrsLen, \r | |
1027 | &UnFragmentLen, \r | |
1028 | &Fragmented,\r | |
1029 | &Head\r | |
1030 | );\r | |
1031 | if (EFI_ERROR (Status)) {\r | |
1032 | goto Restart;\r | |
1033 | }\r | |
a3bcde70 HT |
1034 | //\r |
1035 | // After trim off, the packet is a esp/ah/udp/tcp/icmp6 net buffer,\r | |
1036 | // and no need consider any other ahead ext headers.\r | |
1037 | //\r | |
1038 | Status = Ip6IpSecProcessPacket (\r | |
1039 | IpSb,\r | |
68d3f2fb | 1040 | &Head,\r |
a3bcde70 HT |
1041 | LastHead, // need get the lasthead value for input\r |
1042 | &Packet,\r | |
68d3f2fb | 1043 | &Payload,\r |
1044 | &ExtHdrsLen,\r | |
a3bcde70 HT |
1045 | EfiIPsecInBound,\r |
1046 | NULL\r | |
1047 | );\r | |
1048 | \r | |
68d3f2fb | 1049 | if (EFI_ERROR (Status)) {\r |
a3bcde70 HT |
1050 | goto Restart;\r |
1051 | }\r | |
1052 | \r | |
1053 | //\r | |
68d3f2fb | 1054 | // If the packet is protected by IPsec Tunnel Mode, Check the Inner Ip Packet.\r |
a3bcde70 | 1055 | //\r |
68d3f2fb | 1056 | ZeroMem (&ZeroHead, sizeof (EFI_IP6_HEADER));\r |
1057 | if (0 == CompareMem (Head, &ZeroHead, sizeof (EFI_IP6_HEADER))) {\r | |
1058 | Status = Ip6PreProcessPacket (\r | |
1059 | IpSb, \r | |
1060 | &Packet, \r | |
1061 | Flag, \r | |
1062 | &Payload, \r | |
1063 | &LastHead, \r | |
1064 | &ExtHdrsLen, \r | |
1065 | &UnFragmentLen, \r | |
1066 | &Fragmented, \r | |
1067 | &Head\r | |
1068 | );\r | |
1069 | if (EFI_ERROR (Status)) {\r | |
1070 | goto Restart;\r | |
1071 | }\r | |
1072 | }\r | |
a3bcde70 | 1073 | \r |
90e529e2 | 1074 | //\r |
1075 | // Check the Packet again.\r | |
1076 | //\r | |
1077 | if (Packet == NULL) {\r | |
1078 | goto Restart;\r | |
1079 | }\r | |
1080 | \r | |
a3bcde70 HT |
1081 | //\r |
1082 | // Packet may have been changed. The ownership of the packet\r | |
1083 | // is transfered to the packet process logic.\r | |
1084 | //\r | |
1085 | Head = Packet->Ip.Ip6;\r | |
1086 | IP6_GET_CLIP_INFO (Packet)->Status = EFI_SUCCESS;\r | |
1087 | \r | |
1088 | switch (*LastHead) {\r | |
1089 | case IP6_ICMP:\r | |
1090 | Ip6IcmpHandle (IpSb, Head, Packet);\r | |
1091 | break;\r | |
1092 | default:\r | |
1093 | Ip6Demultiplex (IpSb, Head, Packet);\r | |
1094 | }\r | |
1095 | \r | |
1096 | Packet = NULL;\r | |
1097 | \r | |
1098 | //\r | |
1099 | // Dispatch the DPCs queued by the NotifyFunction of the rx token's events\r | |
1100 | // which are signaled with received data.\r | |
1101 | //\r | |
1102 | DispatchDpc ();\r | |
1103 | \r | |
1104 | Restart:\r | |
1105 | if (Payload != NULL) {\r | |
1106 | FreePool (Payload);\r | |
1107 | }\r | |
1108 | \r | |
1109 | Ip6ReceiveFrame (Ip6AcceptFrame, IpSb);\r | |
1110 | \r | |
1111 | Drop:\r | |
1112 | if (Packet != NULL) {\r | |
1113 | NetbufFree (Packet);\r | |
1114 | }\r | |
1115 | \r | |
1116 | return ;\r | |
1117 | }\r | |
1118 | \r | |
1119 | /**\r | |
1120 | Initialize an already allocated assemble table. This is generally\r | |
1121 | the assemble table embedded in the IP6 service instance.\r | |
1122 | \r | |
1123 | @param[in, out] Table The assemble table to initialize.\r | |
1124 | \r | |
1125 | **/\r | |
1126 | VOID\r | |
1127 | Ip6CreateAssembleTable (\r | |
1128 | IN OUT IP6_ASSEMBLE_TABLE *Table\r | |
1129 | )\r | |
1130 | {\r | |
1131 | UINT32 Index;\r | |
1132 | \r | |
1133 | for (Index = 0; Index < IP6_ASSEMLE_HASH_SIZE; Index++) {\r | |
1134 | InitializeListHead (&Table->Bucket[Index]);\r | |
1135 | }\r | |
1136 | }\r | |
1137 | \r | |
1138 | /**\r | |
1139 | Clean up the assemble table by removing all of the fragments\r | |
1140 | and assemble entries.\r | |
1141 | \r | |
1142 | @param[in, out] Table The assemble table to clean up.\r | |
1143 | \r | |
1144 | **/\r | |
1145 | VOID\r | |
1146 | Ip6CleanAssembleTable (\r | |
1147 | IN OUT IP6_ASSEMBLE_TABLE *Table\r | |
1148 | )\r | |
1149 | {\r | |
1150 | LIST_ENTRY *Entry;\r | |
1151 | LIST_ENTRY *Next;\r | |
1152 | IP6_ASSEMBLE_ENTRY *Assemble;\r | |
1153 | UINT32 Index;\r | |
1154 | \r | |
1155 | for (Index = 0; Index < IP6_ASSEMLE_HASH_SIZE; Index++) {\r | |
1156 | NET_LIST_FOR_EACH_SAFE (Entry, Next, &Table->Bucket[Index]) {\r | |
1157 | Assemble = NET_LIST_USER_STRUCT (Entry, IP6_ASSEMBLE_ENTRY, Link);\r | |
1158 | \r | |
1159 | RemoveEntryList (Entry);\r | |
1160 | Ip6FreeAssembleEntry (Assemble);\r | |
1161 | }\r | |
1162 | }\r | |
1163 | }\r | |
1164 | \r | |
1165 | \r | |
1166 | /**\r | |
1167 | The signal handle of IP6's recycle event. It is called back\r | |
1168 | when the upper layer releases the packet.\r | |
1169 | \r | |
1170 | @param[in] Event The IP6's recycle event.\r | |
1171 | @param[in] Context The context of the handle, which is a IP6_RXDATA_WRAP.\r | |
1172 | \r | |
1173 | **/\r | |
1174 | VOID\r | |
1175 | EFIAPI\r | |
1176 | Ip6OnRecyclePacket (\r | |
1177 | IN EFI_EVENT Event,\r | |
1178 | IN VOID *Context\r | |
1179 | )\r | |
1180 | {\r | |
1181 | IP6_RXDATA_WRAP *Wrap;\r | |
1182 | \r | |
1183 | Wrap = (IP6_RXDATA_WRAP *) Context;\r | |
1184 | \r | |
1185 | EfiAcquireLockOrFail (&Wrap->IpInstance->RecycleLock);\r | |
1186 | RemoveEntryList (&Wrap->Link);\r | |
1187 | EfiReleaseLock (&Wrap->IpInstance->RecycleLock);\r | |
1188 | \r | |
1189 | ASSERT (!NET_BUF_SHARED (Wrap->Packet));\r | |
1190 | NetbufFree (Wrap->Packet);\r | |
1191 | \r | |
1192 | gBS->CloseEvent (Wrap->RxData.RecycleSignal);\r | |
1193 | FreePool (Wrap);\r | |
1194 | }\r | |
1195 | \r | |
1196 | /**\r | |
1197 | Wrap the received packet to a IP6_RXDATA_WRAP, which will be\r | |
1198 | delivered to the upper layer. Each IP6 child that accepts the\r | |
1199 | packet will get a not-shared copy of the packet which is wrapped\r | |
1200 | in the IP6_RXDATA_WRAP. The IP6_RXDATA_WRAP->RxData is passed\r | |
1201 | to the upper layer. The upper layer will signal the recycle event in\r | |
1202 | it when it is done with the packet.\r | |
1203 | \r | |
1204 | @param[in] IpInstance The IP6 child to receive the packet.\r | |
1205 | @param[in] Packet The packet to deliver up.\r | |
1206 | \r | |
1207 | @return NULL if it failed to wrap the packet; otherwise, the wrapper.\r | |
1208 | \r | |
1209 | **/\r | |
1210 | IP6_RXDATA_WRAP *\r | |
1211 | Ip6WrapRxData (\r | |
1212 | IN IP6_PROTOCOL *IpInstance,\r | |
1213 | IN NET_BUF *Packet\r | |
1214 | )\r | |
1215 | {\r | |
1216 | IP6_RXDATA_WRAP *Wrap;\r | |
1217 | EFI_IP6_RECEIVE_DATA *RxData;\r | |
1218 | EFI_STATUS Status;\r | |
1219 | \r | |
1220 | Wrap = AllocatePool (IP6_RXDATA_WRAP_SIZE (Packet->BlockOpNum));\r | |
1221 | \r | |
1222 | if (Wrap == NULL) {\r | |
1223 | return NULL;\r | |
1224 | }\r | |
1225 | \r | |
1226 | InitializeListHead (&Wrap->Link);\r | |
1227 | \r | |
1228 | Wrap->IpInstance = IpInstance;\r | |
1229 | Wrap->Packet = Packet;\r | |
1230 | RxData = &Wrap->RxData;\r | |
1231 | \r | |
1232 | ZeroMem (&RxData->TimeStamp, sizeof (EFI_TIME));\r | |
1233 | \r | |
1234 | Status = gBS->CreateEvent (\r | |
1235 | EVT_NOTIFY_SIGNAL,\r | |
1236 | TPL_NOTIFY,\r | |
1237 | Ip6OnRecyclePacket,\r | |
1238 | Wrap,\r | |
1239 | &RxData->RecycleSignal\r | |
1240 | );\r | |
1241 | \r | |
1242 | if (EFI_ERROR (Status)) {\r | |
1243 | FreePool (Wrap);\r | |
1244 | return NULL;\r | |
1245 | }\r | |
1246 | \r | |
1247 | ASSERT (Packet->Ip.Ip6 != NULL);\r | |
1248 | \r | |
1249 | //\r | |
1250 | // The application expects a network byte order header.\r | |
1251 | //\r | |
1252 | RxData->HeaderLength = sizeof (EFI_IP6_HEADER);\r | |
1253 | RxData->Header = (EFI_IP6_HEADER *) Ip6NtohHead (Packet->Ip.Ip6);\r | |
1254 | RxData->DataLength = Packet->TotalSize;\r | |
1255 | \r | |
1256 | //\r | |
1257 | // Build the fragment table to be delivered up.\r | |
1258 | //\r | |
1259 | RxData->FragmentCount = Packet->BlockOpNum;\r | |
1260 | NetbufBuildExt (Packet, (NET_FRAGMENT *) RxData->FragmentTable, &RxData->FragmentCount);\r | |
1261 | \r | |
1262 | return Wrap;\r | |
1263 | }\r | |
1264 | \r | |
1265 | /**\r | |
1266 | Check whether this IP child accepts the packet.\r | |
1267 | \r | |
1268 | @param[in] IpInstance The IP child to check.\r | |
1269 | @param[in] Head The IP header of the packet.\r | |
1270 | @param[in] Packet The data of the packet.\r | |
1271 | \r | |
1272 | @retval TRUE The child wants to receive the packet.\r | |
1273 | @retval FALSE The child does not want to receive the packet.\r | |
1274 | \r | |
1275 | **/\r | |
1276 | BOOLEAN\r | |
1277 | Ip6InstanceFrameAcceptable (\r | |
1278 | IN IP6_PROTOCOL *IpInstance,\r | |
1279 | IN EFI_IP6_HEADER *Head,\r | |
1280 | IN NET_BUF *Packet\r | |
1281 | )\r | |
1282 | {\r | |
1283 | IP6_ICMP_ERROR_HEAD Icmp;\r | |
1284 | EFI_IP6_CONFIG_DATA *Config;\r | |
1285 | IP6_CLIP_INFO *Info;\r | |
1286 | UINT8 *Proto;\r | |
1287 | UINT32 Index;\r | |
1288 | UINT8 *ExtHdrs;\r | |
1289 | UINT16 ErrMsgPayloadLen;\r | |
1290 | UINT8 *ErrMsgPayload;\r | |
1291 | \r | |
1292 | Config = &IpInstance->ConfigData;\r | |
1293 | Proto = NULL;\r | |
1294 | \r | |
1295 | //\r | |
1296 | // Dirty trick for the Tiano UEFI network stack implmentation. If\r | |
1297 | // ReceiveTimeout == -1, the receive of the packet for this instance\r | |
1298 | // is disabled. The UEFI spec don't have such captibility. We add\r | |
1299 | // this to improve the performance because IP will make a copy of\r | |
1300 | // the received packet for each accepting instance. Some IP instances\r | |
1301 | // used by UDP/TCP only send packets, they don't wants to receive.\r | |
1302 | //\r | |
1303 | if (Config->ReceiveTimeout == (UINT32)(-1)) {\r | |
1304 | return FALSE;\r | |
1305 | }\r | |
1306 | \r | |
1307 | if (Config->AcceptPromiscuous) {\r | |
1308 | return TRUE;\r | |
1309 | }\r | |
1310 | \r | |
1311 | //\r | |
1312 | // Check whether the protocol is acceptable.\r | |
1313 | //\r | |
1314 | ExtHdrs = NetbufGetByte (Packet, 0, NULL);\r | |
1315 | \r | |
1316 | if (!Ip6IsExtsValid (\r | |
1317 | IpInstance->Service,\r | |
1318 | Packet,\r | |
1319 | &Head->NextHeader,\r | |
1320 | ExtHdrs,\r | |
1321 | (UINT32) Head->PayloadLength,\r | |
1322 | TRUE,\r | |
1323 | NULL,\r | |
1324 | &Proto,\r | |
1325 | NULL,\r | |
1326 | NULL,\r | |
1327 | NULL\r | |
1328 | )) {\r | |
1329 | return FALSE;\r | |
1330 | }\r | |
1331 | \r | |
1332 | //\r | |
1333 | // The upper layer driver may want to receive the ICMPv6 error packet\r | |
1334 | // invoked by its packet, like UDP.\r | |
1335 | //\r | |
1336 | if ((*Proto == IP6_ICMP) && (!Config->AcceptAnyProtocol) && (*Proto != Config->DefaultProtocol)) {\r | |
1337 | NetbufCopy (Packet, 0, sizeof (Icmp), (UINT8 *) &Icmp);\r | |
1338 | \r | |
1339 | if (Icmp.Head.Type <= ICMP_V6_ERROR_MAX) {\r | |
1340 | if (!Config->AcceptIcmpErrors) {\r | |
1341 | return FALSE;\r | |
1342 | }\r | |
1343 | \r | |
1344 | //\r | |
1345 | // Get the protocol of the invoking packet of ICMPv6 error packet.\r | |
1346 | //\r | |
1347 | ErrMsgPayloadLen = NTOHS (Icmp.IpHead.PayloadLength);\r | |
1348 | ErrMsgPayload = NetbufGetByte (Packet, sizeof (Icmp), NULL);\r | |
1349 | \r | |
1350 | if (!Ip6IsExtsValid (\r | |
1351 | NULL,\r | |
1352 | NULL,\r | |
1353 | &Icmp.IpHead.NextHeader,\r | |
1354 | ErrMsgPayload,\r | |
1355 | ErrMsgPayloadLen,\r | |
1356 | TRUE,\r | |
1357 | NULL,\r | |
1358 | &Proto,\r | |
1359 | NULL,\r | |
1360 | NULL,\r | |
1361 | NULL\r | |
1362 | )) {\r | |
1363 | return FALSE;\r | |
1364 | }\r | |
1365 | }\r | |
1366 | }\r | |
1367 | \r | |
1368 | //\r | |
1369 | // Match the protocol\r | |
1370 | //\r | |
1371 | if (!Config->AcceptAnyProtocol && (*Proto != Config->DefaultProtocol)) {\r | |
1372 | return FALSE;\r | |
1373 | }\r | |
1374 | \r | |
1375 | //\r | |
1376 | // Check for broadcast, the caller has computed the packet's\r | |
1377 | // cast type for this child's interface.\r | |
1378 | //\r | |
1379 | Info = IP6_GET_CLIP_INFO (Packet);\r | |
1380 | \r | |
1381 | //\r | |
1382 | // If it is a multicast packet, check whether we are in the group.\r | |
1383 | //\r | |
1384 | if (Info->CastType == Ip6Multicast) {\r | |
1385 | //\r | |
1386 | // Receive the multicast if the instance wants to receive all packets.\r | |
1387 | //\r | |
1388 | if (NetIp6IsUnspecifiedAddr (&IpInstance->ConfigData.StationAddress)) {\r | |
1389 | return TRUE;\r | |
1390 | }\r | |
1391 | \r | |
1392 | for (Index = 0; Index < IpInstance->GroupCount; Index++) {\r | |
1393 | if (EFI_IP6_EQUAL (IpInstance->GroupList + Index, &Head->DestinationAddress)) {\r | |
1394 | break;\r | |
1395 | }\r | |
1396 | }\r | |
1397 | \r | |
1398 | return (BOOLEAN)(Index < IpInstance->GroupCount);\r | |
1399 | }\r | |
1400 | \r | |
1401 | return TRUE;\r | |
1402 | }\r | |
1403 | \r | |
1404 | /**\r | |
1405 | Enqueue a shared copy of the packet to the IP6 child if the\r | |
1406 | packet is acceptable to it. Here the data of the packet is\r | |
1407 | shared, but the net buffer isn't.\r | |
1408 | \r | |
1409 | @param IpInstance The IP6 child to enqueue the packet to.\r | |
1410 | @param Head The IP header of the received packet.\r | |
1411 | @param Packet The data of the received packet.\r | |
1412 | \r | |
1413 | @retval EFI_NOT_STARTED The IP child hasn't been configured.\r | |
1414 | @retval EFI_INVALID_PARAMETER The child doesn't want to receive the packet.\r | |
1415 | @retval EFI_OUT_OF_RESOURCES Failed to allocate some resources\r | |
1416 | @retval EFI_SUCCESS A shared copy the packet is enqueued to the child.\r | |
1417 | \r | |
1418 | **/\r | |
1419 | EFI_STATUS\r | |
1420 | Ip6InstanceEnquePacket (\r | |
1421 | IN IP6_PROTOCOL *IpInstance,\r | |
1422 | IN EFI_IP6_HEADER *Head,\r | |
1423 | IN NET_BUF *Packet\r | |
1424 | )\r | |
1425 | {\r | |
1426 | IP6_CLIP_INFO *Info;\r | |
1427 | NET_BUF *Clone;\r | |
1428 | \r | |
1429 | //\r | |
1430 | // Check whether the packet is acceptable to this instance.\r | |
1431 | //\r | |
1432 | if (IpInstance->State != IP6_STATE_CONFIGED) {\r | |
1433 | return EFI_NOT_STARTED;\r | |
1434 | }\r | |
1435 | \r | |
1436 | if (!Ip6InstanceFrameAcceptable (IpInstance, Head, Packet)) {\r | |
1437 | return EFI_INVALID_PARAMETER;\r | |
1438 | }\r | |
1439 | \r | |
1440 | //\r | |
1441 | // Enque a shared copy of the packet.\r | |
1442 | //\r | |
1443 | Clone = NetbufClone (Packet);\r | |
1444 | \r | |
1445 | if (Clone == NULL) {\r | |
1446 | return EFI_OUT_OF_RESOURCES;\r | |
1447 | }\r | |
1448 | \r | |
1449 | //\r | |
1450 | // Set the receive time out for the assembled packet. If it expires,\r | |
1451 | // packet will be removed from the queue.\r | |
1452 | //\r | |
1453 | Info = IP6_GET_CLIP_INFO (Clone);\r | |
1454 | Info->Life = IP6_US_TO_SEC (IpInstance->ConfigData.ReceiveTimeout);\r | |
1455 | \r | |
1456 | InsertTailList (&IpInstance->Received, &Clone->List);\r | |
1457 | return EFI_SUCCESS;\r | |
1458 | }\r | |
1459 | \r | |
1460 | /**\r | |
1461 | Deliver the received packets to the upper layer if there are both received\r | |
1462 | requests and enqueued packets. If the enqueued packet is shared, it will\r | |
1463 | duplicate it to a non-shared packet, release the shared packet, then\r | |
1464 | deliver the non-shared packet up.\r | |
1465 | \r | |
1466 | @param[in] IpInstance The IP child to deliver the packet up.\r | |
1467 | \r | |
1468 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resources to deliver the\r | |
1469 | packets.\r | |
1470 | @retval EFI_SUCCESS All the enqueued packets that can be delivered\r | |
1471 | are delivered up.\r | |
1472 | \r | |
1473 | **/\r | |
1474 | EFI_STATUS\r | |
1475 | Ip6InstanceDeliverPacket (\r | |
1476 | IN IP6_PROTOCOL *IpInstance\r | |
1477 | )\r | |
1478 | {\r | |
1479 | EFI_IP6_COMPLETION_TOKEN *Token;\r | |
1480 | IP6_RXDATA_WRAP *Wrap;\r | |
1481 | NET_BUF *Packet;\r | |
1482 | NET_BUF *Dup;\r | |
1483 | UINT8 *Head;\r | |
1484 | \r | |
1485 | //\r | |
1486 | // Deliver a packet if there are both a packet and a receive token.\r | |
1487 | //\r | |
1488 | while (!IsListEmpty (&IpInstance->Received) && !NetMapIsEmpty (&IpInstance->RxTokens)) {\r | |
1489 | \r | |
1490 | Packet = NET_LIST_HEAD (&IpInstance->Received, NET_BUF, List);\r | |
1491 | \r | |
1492 | if (!NET_BUF_SHARED (Packet)) {\r | |
1493 | //\r | |
1494 | // If this is the only instance that wants the packet, wrap it up.\r | |
1495 | //\r | |
1496 | Wrap = Ip6WrapRxData (IpInstance, Packet);\r | |
1497 | \r | |
1498 | if (Wrap == NULL) {\r | |
1499 | return EFI_OUT_OF_RESOURCES;\r | |
1500 | }\r | |
1501 | \r | |
1502 | RemoveEntryList (&Packet->List);\r | |
1503 | \r | |
1504 | } else {\r | |
1505 | //\r | |
1506 | // Create a duplicated packet if this packet is shared\r | |
1507 | //\r | |
1508 | Dup = NetbufDuplicate (Packet, NULL, sizeof (EFI_IP6_HEADER));\r | |
1509 | \r | |
1510 | if (Dup == NULL) {\r | |
1511 | return EFI_OUT_OF_RESOURCES;\r | |
1512 | }\r | |
1513 | \r | |
1514 | //\r | |
1515 | // Copy the IP head over. The packet to deliver up is\r | |
1516 | // headless. Trim the head off after copy. The IP head\r | |
1517 | // may be not continuous before the data.\r | |
1518 | //\r | |
1519 | Head = NetbufAllocSpace (Dup, sizeof (EFI_IP6_HEADER), NET_BUF_HEAD);\r | |
1520 | ASSERT (Head != NULL);\r | |
1521 | Dup->Ip.Ip6 = (EFI_IP6_HEADER *) Head;\r | |
1522 | \r | |
1523 | CopyMem (Head, Packet->Ip.Ip6, sizeof (EFI_IP6_HEADER));\r | |
1524 | NetbufTrim (Dup, sizeof (EFI_IP6_HEADER), TRUE);\r | |
1525 | \r | |
1526 | Wrap = Ip6WrapRxData (IpInstance, Dup);\r | |
1527 | \r | |
1528 | if (Wrap == NULL) {\r | |
1529 | NetbufFree (Dup);\r | |
1530 | return EFI_OUT_OF_RESOURCES;\r | |
1531 | }\r | |
1532 | \r | |
1533 | RemoveEntryList (&Packet->List);\r | |
1534 | NetbufFree (Packet);\r | |
1535 | \r | |
1536 | Packet = Dup;\r | |
1537 | }\r | |
1538 | \r | |
1539 | //\r | |
1540 | // Insert it into the delivered packet, then get a user's\r | |
1541 | // receive token, pass the wrapped packet up.\r | |
1542 | //\r | |
1543 | EfiAcquireLockOrFail (&IpInstance->RecycleLock);\r | |
1544 | InsertHeadList (&IpInstance->Delivered, &Wrap->Link);\r | |
1545 | EfiReleaseLock (&IpInstance->RecycleLock);\r | |
1546 | \r | |
1547 | Token = NetMapRemoveHead (&IpInstance->RxTokens, NULL);\r | |
1548 | Token->Status = IP6_GET_CLIP_INFO (Packet)->Status;\r | |
1549 | Token->Packet.RxData = &Wrap->RxData;\r | |
1550 | \r | |
1551 | gBS->SignalEvent (Token->Event);\r | |
1552 | }\r | |
1553 | \r | |
1554 | return EFI_SUCCESS;\r | |
1555 | }\r | |
1556 | \r | |
1557 | /**\r | |
1558 | Enqueue a received packet to all the IP children that share\r | |
1559 | the same interface.\r | |
1560 | \r | |
1561 | @param[in] IpSb The IP6 service instance that receive the packet.\r | |
1562 | @param[in] Head The header of the received packet.\r | |
1563 | @param[in] Packet The data of the received packet.\r | |
1564 | @param[in] IpIf The interface to enqueue the packet to.\r | |
1565 | \r | |
1566 | @return The number of the IP6 children that accepts the packet.\r | |
1567 | \r | |
1568 | **/\r | |
1569 | INTN\r | |
1570 | Ip6InterfaceEnquePacket (\r | |
1571 | IN IP6_SERVICE *IpSb,\r | |
1572 | IN EFI_IP6_HEADER *Head,\r | |
1573 | IN NET_BUF *Packet,\r | |
1574 | IN IP6_INTERFACE *IpIf\r | |
1575 | )\r | |
1576 | {\r | |
1577 | IP6_PROTOCOL *IpInstance;\r | |
1578 | IP6_CLIP_INFO *Info;\r | |
1579 | LIST_ENTRY *Entry;\r | |
1580 | INTN Enqueued;\r | |
1581 | INTN LocalType;\r | |
1582 | INTN SavedType;\r | |
1583 | \r | |
1584 | //\r | |
1585 | // First, check that the packet is acceptable to this interface\r | |
1586 | // and find the local cast type for the interface.\r | |
1587 | //\r | |
1588 | LocalType = 0;\r | |
1589 | Info = IP6_GET_CLIP_INFO (Packet);\r | |
1590 | \r | |
1591 | if (IpIf->PromiscRecv) {\r | |
1592 | LocalType = Ip6Promiscuous;\r | |
1593 | } else {\r | |
1594 | LocalType = Info->CastType;\r | |
1595 | }\r | |
1596 | \r | |
1597 | //\r | |
1598 | // Iterate through the ip instances on the interface, enqueue\r | |
1599 | // the packet if filter passed. Save the original cast type,\r | |
1600 | // and pass the local cast type to the IP children on the\r | |
1601 | // interface. The global cast type will be restored later.\r | |
1602 | //\r | |
1603 | SavedType = Info->CastType;\r | |
1604 | Info->CastType = (UINT32) LocalType;\r | |
1605 | \r | |
1606 | Enqueued = 0;\r | |
1607 | \r | |
1608 | NET_LIST_FOR_EACH (Entry, &IpIf->IpInstances) {\r | |
1609 | IpInstance = NET_LIST_USER_STRUCT (Entry, IP6_PROTOCOL, AddrLink);\r | |
1610 | NET_CHECK_SIGNATURE (IpInstance, IP6_PROTOCOL_SIGNATURE);\r | |
1611 | \r | |
1612 | if (Ip6InstanceEnquePacket (IpInstance, Head, Packet) == EFI_SUCCESS) {\r | |
1613 | Enqueued++;\r | |
1614 | }\r | |
1615 | }\r | |
1616 | \r | |
1617 | Info->CastType = (UINT32) SavedType;\r | |
1618 | return Enqueued;\r | |
1619 | }\r | |
1620 | \r | |
1621 | /**\r | |
1622 | Deliver the packet for each IP6 child on the interface.\r | |
1623 | \r | |
1624 | @param[in] IpSb The IP6 service instance that received the packet.\r | |
1625 | @param[in] IpIf The IP6 interface to deliver the packet.\r | |
1626 | \r | |
1627 | **/\r | |
1628 | VOID\r | |
1629 | Ip6InterfaceDeliverPacket (\r | |
1630 | IN IP6_SERVICE *IpSb,\r | |
1631 | IN IP6_INTERFACE *IpIf\r | |
1632 | )\r | |
1633 | {\r | |
1634 | IP6_PROTOCOL *IpInstance;\r | |
1635 | LIST_ENTRY *Entry;\r | |
1636 | \r | |
1637 | NET_LIST_FOR_EACH (Entry, &IpIf->IpInstances) {\r | |
1638 | IpInstance = NET_LIST_USER_STRUCT (Entry, IP6_PROTOCOL, AddrLink);\r | |
1639 | Ip6InstanceDeliverPacket (IpInstance);\r | |
1640 | }\r | |
1641 | }\r | |
1642 | \r | |
1643 | /**\r | |
1644 | De-multiplex the packet. the packet delivery is processed in two\r | |
1645 | passes. The first pass will enqueue a shared copy of the packet\r | |
1646 | to each IP6 child that accepts the packet. The second pass will\r | |
1647 | deliver a non-shared copy of the packet to each IP6 child that\r | |
1648 | has pending receive requests. Data is copied if more than one\r | |
1649 | child wants to consume the packet, because each IP child needs\r | |
1650 | its own copy of the packet to make changes.\r | |
1651 | \r | |
1652 | @param[in] IpSb The IP6 service instance that received the packet.\r | |
1653 | @param[in] Head The header of the received packet.\r | |
1654 | @param[in] Packet The data of the received packet.\r | |
1655 | \r | |
1656 | @retval EFI_NOT_FOUND No IP child accepts the packet.\r | |
1657 | @retval EFI_SUCCESS The packet is enqueued or delivered to some IP\r | |
1658 | children.\r | |
1659 | \r | |
1660 | **/\r | |
1661 | EFI_STATUS\r | |
1662 | Ip6Demultiplex (\r | |
1663 | IN IP6_SERVICE *IpSb,\r | |
1664 | IN EFI_IP6_HEADER *Head,\r | |
1665 | IN NET_BUF *Packet\r | |
1666 | )\r | |
1667 | {\r | |
1668 | \r | |
1669 | LIST_ENTRY *Entry;\r | |
1670 | IP6_INTERFACE *IpIf;\r | |
1671 | INTN Enqueued;\r | |
1672 | \r | |
1673 | //\r | |
1674 | // Two pass delivery: first, enque a shared copy of the packet\r | |
1675 | // to each instance that accept the packet.\r | |
1676 | //\r | |
1677 | Enqueued = 0;\r | |
1678 | \r | |
1679 | NET_LIST_FOR_EACH (Entry, &IpSb->Interfaces) {\r | |
1680 | IpIf = NET_LIST_USER_STRUCT (Entry, IP6_INTERFACE, Link);\r | |
1681 | \r | |
1682 | if (IpIf->Configured) {\r | |
1683 | Enqueued += Ip6InterfaceEnquePacket (IpSb, Head, Packet, IpIf);\r | |
1684 | }\r | |
1685 | }\r | |
1686 | \r | |
1687 | //\r | |
1688 | // Second: deliver a duplicate of the packet to each instance.\r | |
1689 | // Release the local reference first, so that the last instance\r | |
1690 | // getting the packet will not copy the data.\r | |
1691 | //\r | |
1692 | NetbufFree (Packet);\r | |
1693 | Packet = NULL;\r | |
1694 | \r | |
1695 | if (Enqueued == 0) {\r | |
1696 | return EFI_NOT_FOUND;\r | |
1697 | }\r | |
1698 | \r | |
1699 | NET_LIST_FOR_EACH (Entry, &IpSb->Interfaces) {\r | |
1700 | IpIf = NET_LIST_USER_STRUCT (Entry, IP6_INTERFACE, Link);\r | |
1701 | \r | |
1702 | if (IpIf->Configured) {\r | |
1703 | Ip6InterfaceDeliverPacket (IpSb, IpIf);\r | |
1704 | }\r | |
1705 | }\r | |
1706 | \r | |
1707 | return EFI_SUCCESS;\r | |
1708 | }\r | |
1709 | \r | |
1710 | /**\r | |
1711 | Decrease the life of the transmitted packets. If it is\r | |
1712 | decreased to zero, cancel the packet. This function is\r | |
1713 | called by Ip6packetTimerTicking that provides timeout for both the\r | |
1714 | received-but-not-delivered and transmitted-but-not-recycle\r | |
1715 | packets.\r | |
1716 | \r | |
1717 | @param[in] Map The IP6 child's transmit map.\r | |
1718 | @param[in] Item Current transmitted packet.\r | |
1719 | @param[in] Context Not used.\r | |
1720 | \r | |
1721 | @retval EFI_SUCCESS Always returns EFI_SUCCESS.\r | |
1722 | \r | |
1723 | **/\r | |
1724 | EFI_STATUS\r | |
1725 | EFIAPI\r | |
1726 | Ip6SentPacketTicking (\r | |
1727 | IN NET_MAP *Map,\r | |
1728 | IN NET_MAP_ITEM *Item,\r | |
1729 | IN VOID *Context\r | |
1730 | )\r | |
1731 | {\r | |
1732 | IP6_TXTOKEN_WRAP *Wrap;\r | |
1733 | \r | |
1734 | Wrap = (IP6_TXTOKEN_WRAP *) Item->Value;\r | |
1735 | ASSERT (Wrap != NULL);\r | |
1736 | \r | |
1737 | if ((Wrap->Life > 0) && (--Wrap->Life == 0)) {\r | |
1738 | Ip6CancelPacket (Wrap->IpInstance->Interface, Wrap->Packet, EFI_ABORTED);\r | |
1739 | }\r | |
1740 | \r | |
1741 | return EFI_SUCCESS;\r | |
1742 | }\r | |
1743 | \r | |
1744 | /**\r | |
1745 | Timeout the fragments, and the enqueued, and transmitted packets.\r | |
1746 | \r | |
1747 | @param[in] IpSb The IP6 service instance to timeout.\r | |
1748 | \r | |
1749 | **/\r | |
1750 | VOID\r | |
1751 | Ip6PacketTimerTicking (\r | |
1752 | IN IP6_SERVICE *IpSb\r | |
1753 | )\r | |
1754 | {\r | |
1755 | LIST_ENTRY *InstanceEntry;\r | |
1756 | LIST_ENTRY *Entry;\r | |
1757 | LIST_ENTRY *Next;\r | |
1758 | IP6_PROTOCOL *IpInstance;\r | |
1759 | IP6_ASSEMBLE_ENTRY *Assemble;\r | |
1760 | NET_BUF *Packet;\r | |
1761 | IP6_CLIP_INFO *Info;\r | |
1762 | UINT32 Index;\r | |
1763 | \r | |
1764 | //\r | |
1765 | // First, time out the fragments. The packet's life is counting down\r | |
1766 | // once the first-arriving fragment of that packet was received.\r | |
1767 | //\r | |
1768 | for (Index = 0; Index < IP6_ASSEMLE_HASH_SIZE; Index++) {\r | |
1769 | NET_LIST_FOR_EACH_SAFE (Entry, Next, &(IpSb->Assemble.Bucket[Index])) {\r | |
1770 | Assemble = NET_LIST_USER_STRUCT (Entry, IP6_ASSEMBLE_ENTRY, Link);\r | |
1771 | \r | |
1772 | if ((Assemble->Life > 0) && (--Assemble->Life == 0)) {\r | |
1773 | //\r | |
1774 | // If the first fragment (the one with a Fragment Offset of zero)\r | |
1775 | // has been received, an ICMP Time Exceeded - Fragment Reassembly\r | |
1776 | // Time Exceeded message should be sent to the source of that fragment.\r | |
1777 | //\r | |
1778 | if ((Assemble->Packet != NULL) &&\r | |
1779 | !IP6_IS_MULTICAST (&Assemble->Head->DestinationAddress)) {\r | |
1780 | Ip6SendIcmpError (\r | |
1781 | IpSb,\r | |
1782 | Assemble->Packet,\r | |
1783 | NULL,\r | |
1784 | &Assemble->Head->SourceAddress,\r | |
1785 | ICMP_V6_TIME_EXCEEDED,\r | |
1786 | ICMP_V6_TIMEOUT_REASSEMBLE,\r | |
1787 | NULL\r | |
1788 | );\r | |
1789 | }\r | |
1790 | \r | |
1791 | //\r | |
1792 | // If reassembly of a packet is not completed within 60 seconds of\r | |
1793 | // the reception of the first-arriving fragment of that packet, the\r | |
1794 | // reassembly must be abandoned and all the fragments that have been\r | |
1795 | // received for that packet must be discarded.\r | |
1796 | //\r | |
1797 | RemoveEntryList (Entry);\r | |
1798 | Ip6FreeAssembleEntry (Assemble);\r | |
1799 | }\r | |
1800 | }\r | |
1801 | }\r | |
1802 | \r | |
1803 | NET_LIST_FOR_EACH (InstanceEntry, &IpSb->Children) {\r | |
1804 | IpInstance = NET_LIST_USER_STRUCT (InstanceEntry, IP6_PROTOCOL, Link);\r | |
1805 | \r | |
1806 | //\r | |
1807 | // Second, time out the assembled packets enqueued on each IP child.\r | |
1808 | //\r | |
1809 | NET_LIST_FOR_EACH_SAFE (Entry, Next, &IpInstance->Received) {\r | |
1810 | Packet = NET_LIST_USER_STRUCT (Entry, NET_BUF, List);\r | |
1811 | Info = IP6_GET_CLIP_INFO (Packet);\r | |
1812 | \r | |
1813 | if ((Info->Life > 0) && (--Info->Life == 0)) {\r | |
1814 | RemoveEntryList (Entry);\r | |
1815 | NetbufFree (Packet);\r | |
1816 | }\r | |
1817 | }\r | |
1818 | \r | |
1819 | //\r | |
1820 | // Third: time out the transmitted packets.\r | |
1821 | //\r | |
1822 | NetMapIterate (&IpInstance->TxTokens, Ip6SentPacketTicking, NULL);\r | |
1823 | }\r | |
1824 | }\r | |
1825 | \r |