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1 | /** @file\r |
2 | The internal functions and routines to transmit the IP6 packet.\r | |
3 | \r | |
5edac28e | 4 | Copyright (c) 2009 - 2015, 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 | UINT32 mIp6Id;\r | |
19 | \r | |
20 | /**\r | |
21 | Output all the available source addresses to a list entry head SourceList. The\r | |
22 | number of source addresses are also returned.\r | |
23 | \r | |
24 | @param[in] IpSb Points to an IP6 service binding instance.\r | |
25 | @param[out] SourceList The list entry head of all source addresses.\r | |
26 | It is the caller's responsiblity to free the\r | |
27 | resources.\r | |
28 | @param[out] SourceCount The number of source addresses.\r | |
29 | \r | |
30 | @retval EFI_SUCCESS The source addresses were copied to a list entry head\r | |
31 | SourceList.\r | |
32 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resources to complete the operation.\r | |
33 | \r | |
34 | **/\r | |
35 | EFI_STATUS\r | |
36 | Ip6CandidateSource (\r | |
37 | IN IP6_SERVICE *IpSb,\r | |
38 | OUT LIST_ENTRY *SourceList,\r | |
39 | OUT UINT32 *SourceCount\r | |
40 | )\r | |
41 | {\r | |
42 | IP6_INTERFACE *IpIf;\r | |
43 | LIST_ENTRY *Entry;\r | |
44 | LIST_ENTRY *Entry2;\r | |
45 | IP6_ADDRESS_INFO *AddrInfo;\r | |
46 | IP6_ADDRESS_INFO *Copy;\r | |
47 | \r | |
48 | *SourceCount = 0;\r | |
49 | \r | |
50 | if (IpSb->LinkLocalOk) {\r | |
51 | Copy = AllocatePool (sizeof (IP6_ADDRESS_INFO));\r | |
52 | if (Copy == NULL) {\r | |
53 | return EFI_OUT_OF_RESOURCES;\r | |
54 | }\r | |
55 | \r | |
56 | Copy->Signature = IP6_ADDR_INFO_SIGNATURE;\r | |
57 | IP6_COPY_ADDRESS (&Copy->Address, &IpSb->LinkLocalAddr);\r | |
58 | Copy->IsAnycast = FALSE;\r | |
59 | Copy->PrefixLength = IP6_LINK_LOCAL_PREFIX_LENGTH;\r | |
60 | Copy->ValidLifetime = (UINT32) IP6_INFINIT_LIFETIME;\r | |
61 | Copy->PreferredLifetime = (UINT32) IP6_INFINIT_LIFETIME;\r | |
62 | \r | |
63 | InsertTailList (SourceList, &Copy->Link);\r | |
64 | (*SourceCount)++;\r | |
65 | }\r | |
66 | \r | |
67 | NET_LIST_FOR_EACH (Entry, &IpSb->Interfaces) {\r | |
68 | IpIf = NET_LIST_USER_STRUCT (Entry, IP6_INTERFACE, Link);\r | |
69 | \r | |
70 | NET_LIST_FOR_EACH (Entry2, &IpIf->AddressList) {\r | |
71 | AddrInfo = NET_LIST_USER_STRUCT_S (Entry2, IP6_ADDRESS_INFO, Link, IP6_ADDR_INFO_SIGNATURE);\r | |
72 | \r | |
73 | if (AddrInfo->IsAnycast) {\r | |
74 | //\r | |
75 | // Never use an anycast address.\r | |
76 | //\r | |
77 | continue;\r | |
78 | }\r | |
79 | \r | |
80 | Copy = AllocateCopyPool (sizeof (IP6_ADDRESS_INFO), AddrInfo);\r | |
81 | if (Copy == NULL) {\r | |
82 | return EFI_OUT_OF_RESOURCES;\r | |
83 | }\r | |
84 | \r | |
85 | InsertTailList (SourceList, &Copy->Link);\r | |
86 | (*SourceCount)++;\r | |
87 | }\r | |
88 | }\r | |
89 | \r | |
90 | return EFI_SUCCESS;\r | |
91 | }\r | |
92 | \r | |
93 | /**\r | |
5edac28e | 94 | Calculate how many bits are the same between two IPv6 addresses.\r |
a3bcde70 HT |
95 | \r |
96 | @param[in] AddressA Points to an IPv6 address.\r | |
97 | @param[in] AddressB Points to another IPv6 address.\r | |
98 | \r | |
99 | @return The common bits of the AddressA and AddressB.\r | |
100 | \r | |
101 | **/\r | |
102 | UINT8\r | |
103 | Ip6CommonPrefixLen (\r | |
104 | IN EFI_IPv6_ADDRESS *AddressA,\r | |
105 | IN EFI_IPv6_ADDRESS *AddressB\r | |
106 | )\r | |
107 | {\r | |
108 | UINT8 Count;\r | |
109 | UINT8 Index;\r | |
110 | UINT8 ByteA;\r | |
111 | UINT8 ByteB;\r | |
112 | UINT8 NumBits;\r | |
113 | \r | |
114 | Count = 0;\r | |
115 | Index = 0;\r | |
116 | \r | |
117 | while (Index < 16) {\r | |
118 | ByteA = AddressA->Addr[Index];\r | |
119 | ByteB = AddressB->Addr[Index];\r | |
120 | \r | |
121 | if (ByteA == ByteB) {\r | |
122 | Count += 8;\r | |
123 | Index++;\r | |
124 | continue;\r | |
125 | }\r | |
126 | \r | |
127 | //\r | |
128 | // Check how many bits are common between the two bytes.\r | |
129 | //\r | |
130 | NumBits = 8;\r | |
131 | ByteA = (UINT8) (ByteA ^ ByteB);\r | |
132 | \r | |
133 | while (ByteA != 0) {\r | |
134 | NumBits--;\r | |
135 | ByteA = (UINT8) (ByteA >> 1);\r | |
136 | }\r | |
137 | \r | |
138 | return (UINT8) (Count + NumBits);\r | |
139 | }\r | |
140 | \r | |
141 | return Count;\r | |
142 | }\r | |
143 | \r | |
144 | /**\r | |
145 | Output all the available source addresses to a list entry head SourceList. The\r | |
146 | number of source addresses are also returned.\r | |
147 | \r | |
148 | @param[in] IpSb Points to a IP6 service binding instance.\r | |
149 | @param[in] Destination The IPv6 destination address.\r | |
150 | @param[out] Source The selected IPv6 source address according to\r | |
151 | the Destination.\r | |
152 | \r | |
153 | @retval EFI_SUCCESS The source addresses were copied to a list entry\r | |
154 | head SourceList.\r | |
155 | @retval EFI_NO_MAPPING The IPv6 stack is not auto configured.\r | |
156 | \r | |
157 | **/\r | |
158 | EFI_STATUS\r | |
159 | Ip6SelectSourceAddress (\r | |
160 | IN IP6_SERVICE *IpSb,\r | |
161 | IN EFI_IPv6_ADDRESS *Destination,\r | |
162 | OUT EFI_IPv6_ADDRESS *Source\r | |
163 | )\r | |
164 | {\r | |
165 | EFI_STATUS Status;\r | |
166 | LIST_ENTRY SourceList;\r | |
167 | UINT32 SourceCount;\r | |
168 | UINT8 ScopeD;\r | |
169 | LIST_ENTRY *Entry;\r | |
170 | IP6_ADDRESS_INFO *AddrInfo;\r | |
171 | IP6_PREFIX_LIST_ENTRY *Prefix;\r | |
172 | UINT8 LastCommonLength;\r | |
173 | UINT8 CurrentCommonLength;\r | |
174 | EFI_IPv6_ADDRESS *TmpAddress;\r | |
175 | \r | |
176 | NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);\r | |
177 | \r | |
178 | Status = EFI_SUCCESS;\r | |
179 | InitializeListHead (&SourceList);\r | |
180 | \r | |
181 | if (!IpSb->LinkLocalOk) {\r | |
182 | return EFI_NO_MAPPING;\r | |
183 | }\r | |
184 | \r | |
185 | //\r | |
186 | // Rule 1: Prefer same address.\r | |
187 | //\r | |
188 | if (Ip6IsOneOfSetAddress (IpSb, Destination, NULL, NULL)) {\r | |
189 | IP6_COPY_ADDRESS (Source, Destination);\r | |
190 | goto Exit;\r | |
191 | }\r | |
192 | \r | |
193 | //\r | |
194 | // Rule 2: Prefer appropriate scope.\r | |
195 | //\r | |
196 | if (IP6_IS_MULTICAST (Destination)) {\r | |
197 | ScopeD = (UINT8) (Destination->Addr[1] >> 4);\r | |
198 | } else if (NetIp6IsLinkLocalAddr (Destination)) {\r | |
199 | ScopeD = 0x2;\r | |
200 | } else {\r | |
201 | ScopeD = 0xE;\r | |
202 | }\r | |
203 | \r | |
204 | if (ScopeD <= 0x2) {\r | |
205 | //\r | |
206 | // Return the link-local address if it exists\r | |
207 | // One IP6_SERVICE only has one link-local address.\r | |
208 | //\r | |
209 | IP6_COPY_ADDRESS (Source, &IpSb->LinkLocalAddr);\r | |
210 | goto Exit;\r | |
211 | }\r | |
212 | \r | |
213 | //\r | |
214 | // All candidate source addresses are global unicast address.\r | |
215 | //\r | |
216 | Ip6CandidateSource (IpSb, &SourceList, &SourceCount);\r | |
217 | \r | |
218 | if (SourceCount == 0) {\r | |
219 | Status = EFI_NO_MAPPING;\r | |
220 | goto Exit;\r | |
221 | }\r | |
222 | \r | |
223 | IP6_COPY_ADDRESS (Source, &IpSb->LinkLocalAddr);\r | |
224 | \r | |
225 | if (SourceCount == 1) {\r | |
226 | goto Exit;\r | |
227 | }\r | |
228 | \r | |
229 | //\r | |
230 | // Rule 3: Avoid deprecated addresses.\r | |
231 | // TODO: check the "deprecated" state of the stateful configured address\r | |
232 | //\r | |
233 | NET_LIST_FOR_EACH (Entry, &IpSb->AutonomousPrefix) {\r | |
234 | Prefix = NET_LIST_USER_STRUCT (Entry, IP6_PREFIX_LIST_ENTRY, Link);\r | |
235 | if (Prefix->PreferredLifetime == 0) {\r | |
236 | Ip6RemoveAddr (NULL, &SourceList, &SourceCount, &Prefix->Prefix, Prefix->PrefixLength);\r | |
237 | \r | |
238 | if (SourceCount == 1) {\r | |
239 | goto Exit;\r | |
240 | }\r | |
241 | }\r | |
242 | }\r | |
243 | \r | |
244 | //\r | |
245 | // TODO: Rule 4: Prefer home addresses.\r | |
246 | // TODO: Rule 5: Prefer outgoing interface.\r | |
247 | // TODO: Rule 6: Prefer matching label.\r | |
248 | // TODO: Rule 7: Prefer public addresses.\r | |
249 | //\r | |
250 | \r | |
251 | //\r | |
252 | // Rule 8: Use longest matching prefix.\r | |
253 | //\r | |
254 | LastCommonLength = Ip6CommonPrefixLen (Source, Destination);\r | |
255 | TmpAddress = NULL;\r | |
256 | \r | |
257 | for (Entry = SourceList.ForwardLink; Entry != &SourceList; Entry = Entry->ForwardLink) {\r | |
258 | AddrInfo = NET_LIST_USER_STRUCT_S (Entry, IP6_ADDRESS_INFO, Link, IP6_ADDR_INFO_SIGNATURE);\r | |
259 | \r | |
260 | CurrentCommonLength = Ip6CommonPrefixLen (&AddrInfo->Address, Destination);\r | |
261 | if (CurrentCommonLength > LastCommonLength) {\r | |
262 | LastCommonLength = CurrentCommonLength;\r | |
263 | TmpAddress = &AddrInfo->Address;\r | |
264 | }\r | |
265 | }\r | |
266 | \r | |
267 | if (TmpAddress != NULL) {\r | |
268 | IP6_COPY_ADDRESS (Source, TmpAddress);\r | |
269 | }\r | |
270 | \r | |
271 | Exit:\r | |
272 | \r | |
273 | Ip6RemoveAddr (NULL, &SourceList, &SourceCount, NULL, 0);\r | |
274 | \r | |
275 | return Status;\r | |
276 | }\r | |
277 | \r | |
278 | /**\r | |
279 | Select an interface to send the packet generated in the IP6 driver\r | |
280 | itself: that is, not by the requests of the IP6 child's consumer. Such\r | |
281 | packets include the ICMPv6 echo replies and other ICMPv6 error packets.\r | |
282 | \r | |
283 | @param[in] IpSb The IP4 service that wants to send the packets.\r | |
284 | @param[in] Destination The destination of the packet.\r | |
285 | @param[in, out] Source The source of the packet.\r | |
286 | \r | |
287 | @return NULL if no proper interface is found, otherwise, the interface that\r | |
288 | can be used to send the system packet from.\r | |
289 | \r | |
290 | **/\r | |
291 | IP6_INTERFACE *\r | |
292 | Ip6SelectInterface (\r | |
293 | IN IP6_SERVICE *IpSb,\r | |
294 | IN EFI_IPv6_ADDRESS *Destination,\r | |
295 | IN OUT EFI_IPv6_ADDRESS *Source\r | |
296 | )\r | |
297 | {\r | |
298 | EFI_STATUS Status;\r | |
299 | EFI_IPv6_ADDRESS SelectedSource;\r | |
300 | IP6_INTERFACE *IpIf;\r | |
301 | BOOLEAN Exist;\r | |
302 | \r | |
303 | NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);\r | |
304 | ASSERT (Destination != NULL && Source != NULL);\r | |
305 | \r | |
306 | if (NetIp6IsUnspecifiedAddr (Destination)) {\r | |
307 | return NULL;\r | |
308 | }\r | |
309 | \r | |
310 | if (!NetIp6IsUnspecifiedAddr (Source)) {\r | |
311 | Exist = Ip6IsOneOfSetAddress (IpSb, Source, &IpIf, NULL);\r | |
312 | ASSERT (Exist);\r | |
313 | \r | |
314 | return IpIf;\r | |
315 | }\r | |
316 | \r | |
317 | //\r | |
318 | // If source is unspecified, select a source according to the destination.\r | |
319 | //\r | |
320 | Status = Ip6SelectSourceAddress (IpSb, Destination, &SelectedSource);\r | |
321 | if (EFI_ERROR (Status)) {\r | |
322 | return IpSb->DefaultInterface;\r | |
323 | }\r | |
324 | \r | |
325 | Ip6IsOneOfSetAddress (IpSb, &SelectedSource, &IpIf, NULL);\r | |
326 | IP6_COPY_ADDRESS (Source, &SelectedSource);\r | |
327 | \r | |
328 | return IpIf;\r | |
329 | }\r | |
330 | \r | |
331 | /**\r | |
332 | The default callback function for the system generated packet.\r | |
333 | It will free the packet.\r | |
334 | \r | |
335 | @param[in] Packet The packet that transmitted.\r | |
336 | @param[in] IoStatus The result of the transmission, succeeded or failed.\r | |
337 | @param[in] LinkFlag Not used when transmitted. Check IP6_FRAME_CALLBACK\r | |
338 | for reference.\r | |
339 | @param[in] Context The context provided by us.\r | |
340 | \r | |
341 | **/\r | |
342 | VOID\r | |
343 | Ip6SysPacketSent (\r | |
344 | NET_BUF *Packet,\r | |
345 | EFI_STATUS IoStatus,\r | |
346 | UINT32 LinkFlag,\r | |
347 | VOID *Context\r | |
348 | )\r | |
349 | {\r | |
350 | NetbufFree (Packet);\r | |
351 | Packet = NULL;\r | |
352 | }\r | |
353 | \r | |
354 | /**\r | |
355 | Prefix an IP6 basic head and unfragmentable extension headers and a fragment header\r | |
356 | to the Packet. Used for IP6 fragmentation.\r | |
357 | \r | |
358 | @param[in] IpSb The IP6 service instance to transmit the packet.\r | |
359 | @param[in] Packet The packet to prefix the IP6 header to.\r | |
360 | @param[in] Head The caller supplied header.\r | |
361 | @param[in] FragmentOffset The fragment offset of the data following the header.\r | |
362 | @param[in] ExtHdrs The length of the original extension header.\r | |
363 | @param[in] ExtHdrsLen The length of the extension headers.\r | |
364 | @param[in] LastHeader The pointer of next header of last extension header.\r | |
365 | @param[in] HeadLen The length of the unfragmented part of the IP6 header.\r | |
366 | \r | |
367 | @retval EFI_BAD_BUFFER_SIZE There is no enought room in the head space of\r | |
368 | Packet.\r | |
369 | @retval EFI_SUCCESS The operation performed successfully.\r | |
370 | \r | |
371 | **/\r | |
372 | EFI_STATUS\r | |
373 | Ip6PrependHead (\r | |
374 | IN IP6_SERVICE *IpSb,\r | |
375 | IN NET_BUF *Packet,\r | |
376 | IN EFI_IP6_HEADER *Head,\r | |
377 | IN UINT16 FragmentOffset,\r | |
378 | IN UINT8 *ExtHdrs,\r | |
379 | IN UINT32 ExtHdrsLen,\r | |
380 | IN UINT8 LastHeader,\r | |
381 | IN UINT32 HeadLen\r | |
382 | )\r | |
383 | {\r | |
384 | UINT32 Len;\r | |
385 | UINT32 UnFragExtHdrsLen;\r | |
386 | EFI_IP6_HEADER *PacketHead;\r | |
387 | UINT8 *UpdatedExtHdrs;\r | |
388 | EFI_STATUS Status;\r | |
389 | UINT8 NextHeader;\r | |
390 | \r | |
94866d40 ED |
391 | UpdatedExtHdrs = NULL;\r |
392 | \r | |
a3bcde70 HT |
393 | //\r |
394 | // HeadLen is the length of the fixed part of the sequences of fragments, i.e.\r | |
395 | // the unfragment part.\r | |
396 | //\r | |
397 | PacketHead = (EFI_IP6_HEADER *) NetbufAllocSpace (Packet, HeadLen, NET_BUF_HEAD);\r | |
398 | if (PacketHead == NULL) {\r | |
399 | return EFI_BAD_BUFFER_SIZE;\r | |
400 | }\r | |
401 | \r | |
402 | //\r | |
403 | // Set the head up, convert the host byte order to network byte order\r | |
404 | //\r | |
405 | CopyMem (PacketHead, Head, sizeof (EFI_IP6_HEADER));\r | |
406 | PacketHead->PayloadLength = HTONS ((UINT16) (Packet->TotalSize - sizeof (EFI_IP6_HEADER)));\r | |
407 | Packet->Ip.Ip6 = PacketHead;\r | |
408 | \r | |
409 | Len = HeadLen - sizeof (EFI_IP6_HEADER);\r | |
410 | UnFragExtHdrsLen = Len - sizeof (IP6_FRAGMENT_HEADER);\r | |
411 | \r | |
412 | if (UnFragExtHdrsLen == 0) {\r | |
413 | PacketHead->NextHeader = IP6_FRAGMENT;\r | |
414 | }\r | |
415 | \r | |
416 | //\r | |
417 | // Append the extension headers: firstly copy the unfragmentable headers, then append\r | |
418 | // fragmentation header.\r | |
419 | //\r | |
420 | if ((FragmentOffset & IP6_FRAGMENT_OFFSET_MASK) == 0) {\r | |
421 | NextHeader = Head->NextHeader;\r | |
422 | } else {\r | |
423 | NextHeader = PacketHead->NextHeader;\r | |
424 | }\r | |
425 | \r | |
426 | Status = Ip6FillFragmentHeader (\r | |
427 | IpSb,\r | |
428 | NextHeader,\r | |
429 | LastHeader,\r | |
430 | ExtHdrs,\r | |
431 | ExtHdrsLen,\r | |
432 | FragmentOffset,\r | |
433 | &UpdatedExtHdrs\r | |
434 | );\r | |
435 | if (EFI_ERROR (Status)) {\r | |
436 | return Status;\r | |
437 | }\r | |
438 | \r | |
439 | CopyMem (\r | |
440 | (UINT8 *) (PacketHead + 1),\r | |
441 | UpdatedExtHdrs,\r | |
442 | UnFragExtHdrsLen + sizeof (IP6_FRAGMENT_HEADER)\r | |
443 | );\r | |
444 | \r | |
445 | FreePool (UpdatedExtHdrs);\r | |
446 | return EFI_SUCCESS;\r | |
447 | }\r | |
448 | \r | |
449 | /**\r | |
450 | Transmit an IP6 packet. The packet comes either from the IP6\r | |
451 | child's consumer (IpInstance != NULL) or the IP6 driver itself\r | |
452 | (IpInstance == NULL). It will route the packet, fragment it,\r | |
453 | then transmit all the fragments through an interface.\r | |
454 | \r | |
455 | @param[in] IpSb The IP6 service instance to transmit the packet.\r | |
456 | @param[in] Interface The IP6 interface to transmit the packet. Ignored\r | |
457 | if NULL.\r | |
458 | @param[in] IpInstance The IP6 child that issues the transmission. It is\r | |
459 | NULL if the packet is from the system.\r | |
460 | @param[in] Packet The user data to send, excluding the IP header.\r | |
461 | @param[in] Head The caller supplied header. The caller should set\r | |
462 | the following header fields: NextHeader, HopLimit,\r | |
463 | Src, Dest, FlowLabel, PayloadLength. This function\r | |
464 | will fill in the Ver, TrafficClass.\r | |
465 | @param[in] ExtHdrs The extension headers to append to the IPv6 basic\r | |
466 | header.\r | |
467 | @param[in] ExtHdrsLen The length of the extension headers.\r | |
468 | @param[in] Callback The callback function to issue when transmission\r | |
469 | completed.\r | |
470 | @param[in] Context The opaque context for the callback.\r | |
471 | \r | |
472 | @retval EFI_INVALID_PARAMETER Any input parameter or the packet is invalid.\r | |
473 | @retval EFI_NO_MAPPING There is no interface to the destination.\r | |
474 | @retval EFI_NOT_FOUND There is no route to the destination.\r | |
475 | @retval EFI_SUCCESS The packet successfully transmitted.\r | |
476 | @retval EFI_OUT_OF_RESOURCES Failed to finish the operation due to lack of\r | |
477 | resources.\r | |
478 | @retval Others Failed to transmit the packet.\r | |
479 | \r | |
480 | **/\r | |
481 | EFI_STATUS\r | |
482 | Ip6Output (\r | |
483 | IN IP6_SERVICE *IpSb,\r | |
484 | IN IP6_INTERFACE *Interface OPTIONAL,\r | |
485 | IN IP6_PROTOCOL *IpInstance OPTIONAL,\r | |
486 | IN NET_BUF *Packet,\r | |
487 | IN EFI_IP6_HEADER *Head,\r | |
488 | IN UINT8 *ExtHdrs,\r | |
489 | IN UINT32 ExtHdrsLen,\r | |
490 | IN IP6_FRAME_CALLBACK Callback,\r | |
491 | IN VOID *Context\r | |
492 | )\r | |
493 | {\r | |
494 | IP6_INTERFACE *IpIf;\r | |
495 | EFI_IPv6_ADDRESS NextHop;\r | |
496 | IP6_NEIGHBOR_ENTRY *NeighborCache;\r | |
497 | IP6_ROUTE_CACHE_ENTRY *RouteCache;\r | |
498 | EFI_STATUS Status;\r | |
499 | UINT32 Mtu;\r | |
500 | UINT32 HeadLen;\r | |
501 | UINT16 FragmentOffset;\r | |
502 | UINT8 *LastHeader;\r | |
503 | UINT32 UnFragmentLen;\r | |
504 | UINT32 UnFragmentHdrsLen;\r | |
505 | UINT32 FragmentHdrsLen;\r | |
506 | UINT16 *Checksum;\r | |
507 | UINT16 PacketChecksum;\r | |
508 | UINT16 PseudoChecksum;\r | |
509 | UINT32 Index;\r | |
510 | UINT32 PacketLen;\r | |
511 | UINT32 RealExtLen;\r | |
512 | UINT32 Offset;\r | |
513 | NET_BUF *TmpPacket;\r | |
514 | NET_BUF *Fragment;\r | |
515 | UINT32 Num;\r | |
516 | UINT8 *Buf;\r | |
517 | EFI_IP6_HEADER *PacketHead;\r | |
518 | IP6_ICMP_HEAD *IcmpHead;\r | |
519 | IP6_TXTOKEN_WRAP *Wrap;\r | |
520 | IP6_ROUTE_ENTRY *RouteEntry;\r | |
521 | UINT8 *UpdatedExtHdrs;\r | |
522 | UINT8 NextHeader;\r | |
523 | UINT8 LastHeaderBackup;\r | |
524 | BOOLEAN FragmentHeadInserted;\r | |
525 | UINT8 *ExtHdrsBackup;\r | |
526 | UINT8 NextHeaderBackup;\r | |
527 | EFI_IPv6_ADDRESS Source;\r | |
528 | EFI_IPv6_ADDRESS Destination;\r | |
529 | \r | |
530 | NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);\r | |
531 | \r | |
532 | //\r | |
533 | // RFC2460: Each extension header is an integer multiple of 8 octets long,\r | |
534 | // in order to retain 8-octet alignment for subsequent headers.\r | |
535 | //\r | |
536 | if ((ExtHdrsLen & 0x7) != 0) {\r | |
537 | return EFI_INVALID_PARAMETER;\r | |
538 | }\r | |
539 | \r | |
540 | LastHeader = NULL;\r | |
541 | \r | |
542 | Ip6IsExtsValid (\r | |
543 | NULL,\r | |
544 | NULL,\r | |
545 | &Head->NextHeader,\r | |
546 | ExtHdrs,\r | |
547 | ExtHdrsLen,\r | |
548 | FALSE,\r | |
549 | NULL,\r | |
550 | &LastHeader,\r | |
551 | NULL,\r | |
552 | NULL,\r | |
553 | NULL\r | |
554 | );\r | |
555 | \r | |
556 | //\r | |
557 | // Select an interface/source for system packet, application\r | |
558 | // should select them itself.\r | |
559 | //\r | |
560 | IpIf = Interface;\r | |
561 | if (IpIf == NULL) {\r | |
562 | //\r | |
563 | // IpInstance->Interface is NULL when IpInstance is configured with both stationaddress\r | |
564 | // and destinationaddress is unspecified.\r | |
565 | //\r | |
566 | if (IpInstance == NULL || IpInstance->Interface == NULL) {\r | |
567 | IpIf = Ip6SelectInterface (IpSb, &Head->DestinationAddress, &Head->SourceAddress);\r | |
568 | if (IpInstance != NULL) {\r | |
569 | IpInstance->Interface = IpIf;\r | |
570 | }\r | |
571 | } else {\r | |
572 | IpIf = IpInstance->Interface;\r | |
573 | }\r | |
574 | }\r | |
575 | \r | |
576 | if (IpIf == NULL) {\r | |
577 | return EFI_NO_MAPPING;\r | |
578 | }\r | |
579 | \r | |
580 | //\r | |
581 | // Update the common field in Head here.\r | |
582 | //\r | |
583 | Head->Version = 6;\r | |
584 | Head->TrafficClassL = 0;\r | |
585 | Head->TrafficClassH = 0;\r | |
586 | \r | |
587 | Checksum = NULL;\r | |
588 | NextHeader = *LastHeader;\r | |
589 | \r | |
590 | switch (NextHeader) {\r | |
591 | case EFI_IP_PROTO_UDP:\r | |
592 | Packet->Udp = (EFI_UDP_HEADER *) NetbufGetByte (Packet, 0, NULL);\r | |
593 | ASSERT (Packet->Udp != NULL);\r | |
594 | if (Packet->Udp->Checksum == 0) {\r | |
595 | Checksum = &Packet->Udp->Checksum;\r | |
596 | }\r | |
597 | break;\r | |
598 | \r | |
599 | case EFI_IP_PROTO_TCP:\r | |
600 | Packet->Tcp = (TCP_HEAD *) NetbufGetByte (Packet, 0, NULL);\r | |
601 | ASSERT (Packet->Tcp != NULL);\r | |
602 | if (Packet->Tcp->Checksum == 0) {\r | |
603 | Checksum = &Packet->Tcp->Checksum;\r | |
604 | }\r | |
605 | break;\r | |
606 | \r | |
607 | case IP6_ICMP:\r | |
608 | //\r | |
609 | // Don't send ICMP packet to an IPv6 anycast address.\r | |
610 | //\r | |
611 | if (Ip6IsAnycast (IpSb, &Head->DestinationAddress)) {\r | |
612 | return EFI_INVALID_PARAMETER;\r | |
613 | }\r | |
614 | \r | |
615 | IcmpHead = (IP6_ICMP_HEAD *) NetbufGetByte (Packet, 0, NULL);\r | |
616 | ASSERT (IcmpHead != NULL);\r | |
617 | if (IcmpHead->Checksum == 0) {\r | |
618 | Checksum = &IcmpHead->Checksum;\r | |
619 | }\r | |
620 | break;\r | |
621 | \r | |
622 | default:\r | |
623 | break;\r | |
624 | }\r | |
625 | \r | |
626 | if (Checksum != NULL) {\r | |
627 | //\r | |
628 | // Calculate the checksum for upper layer protocol if it is not calculated due to lack of\r | |
629 | // IPv6 source address.\r | |
630 | //\r | |
631 | PacketChecksum = NetbufChecksum (Packet);\r | |
632 | PseudoChecksum = NetIp6PseudoHeadChecksum (\r | |
633 | &Head->SourceAddress,\r | |
634 | &Head->DestinationAddress,\r | |
635 | NextHeader,\r | |
636 | Packet->TotalSize\r | |
637 | );\r | |
638 | *Checksum = (UINT16) ~NetAddChecksum (PacketChecksum, PseudoChecksum);\r | |
639 | }\r | |
640 | \r | |
641 | Status = Ip6IpSecProcessPacket (\r | |
642 | IpSb,\r | |
68d3f2fb | 643 | &Head,\r |
a3bcde70 HT |
644 | LastHeader, // no need get the lasthead value for output\r |
645 | &Packet,\r | |
68d3f2fb | 646 | &ExtHdrs,\r |
647 | &ExtHdrsLen,\r | |
a3bcde70 HT |
648 | EfiIPsecOutBound,\r |
649 | Context\r | |
650 | );\r | |
651 | \r | |
652 | if (EFI_ERROR(Status)) {\r | |
653 | return Status;\r | |
654 | }\r | |
655 | \r | |
656 | LastHeader = NULL;\r | |
657 | //\r | |
658 | // Check incoming parameters.\r | |
659 | //\r | |
660 | if (!Ip6IsExtsValid (\r | |
661 | IpSb,\r | |
662 | Packet,\r | |
663 | &Head->NextHeader,\r | |
664 | ExtHdrs,\r | |
665 | ExtHdrsLen,\r | |
666 | FALSE,\r | |
667 | NULL,\r | |
668 | &LastHeader,\r | |
669 | &RealExtLen,\r | |
670 | &UnFragmentHdrsLen,\r | |
671 | NULL\r | |
672 | )) {\r | |
673 | return EFI_INVALID_PARAMETER;\r | |
674 | }\r | |
675 | \r | |
676 | if ((RealExtLen & 0x7) != 0) {\r | |
677 | return EFI_INVALID_PARAMETER;\r | |
678 | }\r | |
679 | \r | |
680 | LastHeaderBackup = *LastHeader;\r | |
681 | \r | |
682 | //\r | |
683 | // Perform next hop determination:\r | |
684 | // For multicast packets, the next-hop is always the destination address and\r | |
685 | // is considered to be on-link.\r | |
686 | //\r | |
687 | if (IP6_IS_MULTICAST (&Head->DestinationAddress)) {\r | |
688 | IP6_COPY_ADDRESS (&NextHop, &Head->DestinationAddress);\r | |
689 | } else {\r | |
690 | //\r | |
691 | // For unicast packets, use a combination of the Destination Cache, the Prefix List\r | |
692 | // and the Default Router List to determine the IP address of the appropriate next hop.\r | |
693 | //\r | |
a3bcde70 | 694 | \r |
129b8b09 | 695 | NeighborCache = Ip6FindNeighborEntry (IpSb, &Head->DestinationAddress);\r |
696 | if (NeighborCache != NULL) {\r | |
697 | //\r | |
698 | // Hit Neighbor Cache.\r | |
699 | //\r | |
700 | IP6_COPY_ADDRESS (&NextHop, &Head->DestinationAddress);\r | |
701 | } else {\r | |
702 | //\r | |
703 | // Not in Neighbor Cache, check Router cache\r | |
704 | //\r | |
705 | RouteCache = Ip6Route (IpSb, &Head->DestinationAddress, &Head->SourceAddress);\r | |
706 | if (RouteCache == NULL) {\r | |
707 | return EFI_NOT_FOUND;\r | |
708 | }\r | |
709 | \r | |
710 | IP6_COPY_ADDRESS (&NextHop, &RouteCache->NextHop);\r | |
711 | Ip6FreeRouteCacheEntry (RouteCache);\r | |
712 | }\r | |
a3bcde70 HT |
713 | }\r |
714 | \r | |
715 | //\r | |
716 | // Examines the Neighbor Cache for link-layer information about that neighbor.\r | |
717 | // DO NOT create neighbor cache if neighbor is itself - when reporting ICMP error.\r | |
718 | //\r | |
719 | if (!IP6_IS_MULTICAST (&NextHop) && !EFI_IP6_EQUAL (&Head->DestinationAddress, &Head->SourceAddress)) {\r | |
720 | NeighborCache = Ip6FindNeighborEntry (IpSb, &NextHop);\r | |
721 | if (NeighborCache == NULL) {\r | |
722 | NeighborCache = Ip6CreateNeighborEntry (IpSb, Ip6OnArpResolved, &NextHop, NULL);\r | |
723 | \r | |
724 | if (NeighborCache == NULL) {\r | |
725 | return EFI_OUT_OF_RESOURCES;\r | |
726 | }\r | |
727 | \r | |
728 | //\r | |
729 | // Send out multicast neighbor solicitation for address resolution immediatly.\r | |
730 | //\r | |
731 | Ip6CreateSNMulticastAddr (&NeighborCache->Neighbor, &Destination);\r | |
732 | Status = Ip6SelectSourceAddress (IpSb, &NeighborCache->Neighbor, &Source);\r | |
733 | if (EFI_ERROR (Status)) {\r | |
734 | return Status;\r | |
735 | }\r | |
736 | \r | |
737 | Status = Ip6SendNeighborSolicit (\r | |
738 | IpSb,\r | |
739 | &Source,\r | |
740 | &Destination,\r | |
741 | &NeighborCache->Neighbor,\r | |
742 | &IpSb->SnpMode.CurrentAddress\r | |
743 | );\r | |
744 | if (EFI_ERROR (Status)) {\r | |
745 | return Status;\r | |
746 | }\r | |
747 | \r | |
748 | --NeighborCache->Transmit;\r | |
749 | NeighborCache->Ticks = IP6_GET_TICKS (IpSb->RetransTimer) + 1;\r | |
750 | }\r | |
751 | \r | |
752 | NeighborCache->Interface = IpIf;\r | |
753 | }\r | |
754 | \r | |
755 | UpdatedExtHdrs = NULL;\r | |
756 | ExtHdrsBackup = NULL;\r | |
757 | NextHeaderBackup = 0;\r | |
758 | FragmentHeadInserted = FALSE;\r | |
759 | \r | |
760 | //\r | |
761 | // Check whether we received Packet Too Big message for the packet sent to the\r | |
762 | // Destination. If yes include a Fragment Header in the subsequent packets.\r | |
763 | //\r | |
764 | RouteEntry = Ip6FindRouteEntry (\r | |
765 | IpSb->RouteTable,\r | |
766 | &Head->DestinationAddress,\r | |
767 | NULL\r | |
768 | );\r | |
769 | if (RouteEntry != NULL) {\r | |
770 | if ((RouteEntry->Flag & IP6_PACKET_TOO_BIG) == IP6_PACKET_TOO_BIG) {\r | |
771 | \r | |
772 | //\r | |
773 | // FragmentHead is inserted after Hop-by-Hop Options header, Destination\r | |
774 | // Options header (first occur), Routing header, and before Fragment header,\r | |
775 | // Authentication header, Encapsulating Security Payload header, and\r | |
776 | // Destination Options header (last occur), and upper-layer header.\r | |
777 | //\r | |
778 | Status = Ip6FillFragmentHeader (\r | |
779 | IpSb,\r | |
780 | Head->NextHeader,\r | |
781 | LastHeaderBackup,\r | |
782 | ExtHdrs,\r | |
783 | ExtHdrsLen,\r | |
784 | 0,\r | |
785 | &UpdatedExtHdrs\r | |
786 | );\r | |
787 | if (EFI_ERROR (Status)) {\r | |
788 | return Status;\r | |
789 | }\r | |
790 | \r | |
791 | if ((ExtHdrs == NULL) && (ExtHdrsLen == 0)) {\r | |
792 | NextHeaderBackup = Head->NextHeader;\r | |
793 | Head->NextHeader = IP6_FRAGMENT;\r | |
794 | }\r | |
795 | \r | |
796 | ExtHdrsBackup = ExtHdrs;\r | |
797 | ExtHdrs = UpdatedExtHdrs;\r | |
798 | ExtHdrsLen = ExtHdrsLen + sizeof (IP6_FRAGMENT_HEADER);\r | |
799 | RealExtLen = RealExtLen + sizeof (IP6_FRAGMENT_HEADER);\r | |
800 | \r | |
801 | mIp6Id++;\r | |
802 | \r | |
803 | FragmentHeadInserted = TRUE;\r | |
804 | }\r | |
805 | \r | |
806 | Ip6FreeRouteEntry (RouteEntry);\r | |
807 | }\r | |
808 | \r | |
809 | //\r | |
810 | // OK, selected the source and route, fragment the packet then send\r | |
811 | // them. Tag each fragment other than the first one as spawn from it.\r | |
812 | // Each extension header is an integar multiple of 8 octets long, in\r | |
813 | // order to retain 8-octet alignment for subsequent headers.\r | |
814 | //\r | |
815 | Mtu = IpSb->MaxPacketSize + sizeof (EFI_IP6_HEADER);\r | |
816 | HeadLen = sizeof (EFI_IP6_HEADER) + RealExtLen;\r | |
817 | \r | |
818 | if (Packet->TotalSize + HeadLen > Mtu) {\r | |
819 | //\r | |
820 | // Remove the inserted Fragment Header since we need fragment the packet.\r | |
821 | //\r | |
822 | if (FragmentHeadInserted) {\r | |
823 | ExtHdrs = ExtHdrsBackup;\r | |
824 | ExtHdrsLen = ExtHdrsLen - sizeof (IP6_FRAGMENT_HEADER);\r | |
825 | \r | |
826 | if ((ExtHdrs == NULL) && (ExtHdrsLen == 0)) {\r | |
827 | Head->NextHeader = NextHeaderBackup;\r | |
828 | }\r | |
829 | }\r | |
830 | \r | |
831 | FragmentHdrsLen = ExtHdrsLen - UnFragmentHdrsLen;\r | |
832 | \r | |
833 | //\r | |
834 | // The packet is beyond the maximum which can be described through the\r | |
835 | // fragment offset field in Fragment header.\r | |
836 | //\r | |
837 | if ((((Packet->TotalSize + FragmentHdrsLen) >> 3) & (~0x1fff)) != 0) {\r | |
838 | Status = EFI_BAD_BUFFER_SIZE;\r | |
839 | goto Error;\r | |
840 | }\r | |
841 | \r | |
842 | if (FragmentHdrsLen != 0) {\r | |
843 | //\r | |
844 | // Append the fragmentable extension hdrs before the upper layer payload\r | |
845 | // to form a new NET_BUF. This NET_BUF contains all the buffer which will\r | |
846 | // be fragmented below.\r | |
847 | //\r | |
848 | TmpPacket = NetbufGetFragment (Packet, 0, Packet->TotalSize, FragmentHdrsLen);\r | |
849 | ASSERT (TmpPacket != NULL);\r | |
850 | \r | |
851 | //\r | |
852 | // Allocate the space to contain the fragmentable hdrs and copy the data.\r | |
853 | //\r | |
854 | Buf = NetbufAllocSpace (TmpPacket, FragmentHdrsLen, TRUE);\r | |
855 | ASSERT (Buf != NULL);\r | |
856 | CopyMem (Buf, ExtHdrs + UnFragmentHdrsLen, FragmentHdrsLen);\r | |
857 | \r | |
858 | //\r | |
859 | // Free the old Packet.\r | |
860 | //\r | |
861 | NetbufFree (Packet);\r | |
862 | Packet = TmpPacket;\r | |
863 | }\r | |
864 | \r | |
865 | //\r | |
866 | // The unfragment part which appears in every fragmented IPv6 packet includes\r | |
867 | // the IPv6 header, the unfragmentable extension hdrs and the fragment header.\r | |
868 | //\r | |
869 | UnFragmentLen = sizeof (EFI_IP6_HEADER) + UnFragmentHdrsLen + sizeof (IP6_FRAGMENT_HEADER);\r | |
870 | \r | |
871 | //\r | |
872 | // Mtu now is the length of the fragment part in a full-length fragment.\r | |
873 | //\r | |
874 | Mtu = (Mtu - UnFragmentLen) & (~0x07);\r | |
875 | Num = (Packet->TotalSize + Mtu - 1) / Mtu;\r | |
876 | \r | |
877 | for (Index = 0, Offset = 0, PacketLen = Mtu; Index < Num; Index++) {\r | |
878 | //\r | |
879 | // Get fragment from the Packet, append UnFragnmentLen spare buffer\r | |
880 | // before the fragmented data, the corresponding data is filled in later.\r | |
881 | //\r | |
882 | Fragment = NetbufGetFragment (Packet, Offset, PacketLen, UnFragmentLen);\r | |
883 | if (Fragment == NULL) {\r | |
884 | Status = EFI_OUT_OF_RESOURCES;\r | |
885 | goto Error;\r | |
886 | }\r | |
887 | \r | |
888 | FragmentOffset = (UINT16) ((UINT16) Offset | 0x1);\r | |
889 | if (Index == Num - 1){\r | |
890 | //\r | |
891 | // The last fragment, clear the M flag.\r | |
892 | //\r | |
893 | FragmentOffset &= (~0x1);\r | |
894 | }\r | |
895 | \r | |
896 | Status = Ip6PrependHead (\r | |
897 | IpSb,\r | |
898 | Fragment,\r | |
899 | Head,\r | |
900 | FragmentOffset,\r | |
901 | ExtHdrs,\r | |
902 | ExtHdrsLen,\r | |
903 | LastHeaderBackup,\r | |
904 | UnFragmentLen\r | |
905 | );\r | |
906 | ASSERT (Status == EFI_SUCCESS);\r | |
907 | \r | |
908 | Status = Ip6SendFrame (\r | |
909 | IpIf,\r | |
910 | IpInstance,\r | |
911 | Fragment,\r | |
912 | &NextHop,\r | |
913 | Ip6SysPacketSent,\r | |
914 | Packet\r | |
915 | );\r | |
916 | if (EFI_ERROR (Status)) {\r | |
917 | goto Error;\r | |
918 | }\r | |
919 | \r | |
920 | //\r | |
921 | // The last fragment of upper layer packet, update the IP6 token status.\r | |
922 | //\r | |
923 | if ((Index == Num -1) && (Context != NULL)) {\r | |
924 | Wrap = (IP6_TXTOKEN_WRAP *) Context;\r | |
925 | Wrap->Token->Status = Status;\r | |
926 | }\r | |
927 | \r | |
928 | Offset += PacketLen;\r | |
929 | PacketLen = Packet->TotalSize - Offset;\r | |
930 | if (PacketLen > Mtu) {\r | |
931 | PacketLen = Mtu;\r | |
932 | }\r | |
933 | }\r | |
934 | \r | |
935 | NetbufFree (Packet);\r | |
936 | mIp6Id++;\r | |
937 | \r | |
938 | if (UpdatedExtHdrs != NULL) {\r | |
939 | FreePool (UpdatedExtHdrs);\r | |
940 | }\r | |
941 | \r | |
942 | return EFI_SUCCESS;\r | |
943 | }\r | |
944 | \r | |
945 | //\r | |
946 | // Need not fragment the packet, send it in one frame.\r | |
947 | //\r | |
948 | PacketHead = (EFI_IP6_HEADER *) NetbufAllocSpace (Packet, HeadLen, NET_BUF_HEAD);\r | |
949 | if (PacketHead == NULL) {\r | |
950 | Status = EFI_BAD_BUFFER_SIZE;\r | |
951 | goto Error;\r | |
952 | }\r | |
953 | \r | |
954 | CopyMem (PacketHead, Head, sizeof (EFI_IP6_HEADER));\r | |
955 | Packet->Ip.Ip6 = PacketHead;\r | |
956 | \r | |
957 | if (ExtHdrs != NULL) {\r | |
958 | Buf = (UINT8 *) (PacketHead + 1);\r | |
959 | CopyMem (Buf, ExtHdrs, ExtHdrsLen);\r | |
960 | }\r | |
961 | \r | |
962 | if (UpdatedExtHdrs != NULL) {\r | |
963 | //\r | |
964 | // A Fragment Header is inserted to the packet, update the payload length.\r | |
965 | //\r | |
966 | PacketHead->PayloadLength = (UINT16) (NTOHS (PacketHead->PayloadLength) +\r | |
967 | sizeof (IP6_FRAGMENT_HEADER));\r | |
968 | PacketHead->PayloadLength = HTONS (PacketHead->PayloadLength);\r | |
969 | FreePool (UpdatedExtHdrs);\r | |
970 | }\r | |
971 | \r | |
972 | return Ip6SendFrame (\r | |
973 | IpIf,\r | |
974 | IpInstance,\r | |
975 | Packet,\r | |
976 | &NextHop,\r | |
977 | Callback,\r | |
978 | Context\r | |
979 | );\r | |
980 | \r | |
981 | Error:\r | |
982 | if (UpdatedExtHdrs != NULL) {\r | |
983 | FreePool (UpdatedExtHdrs);\r | |
984 | }\r | |
985 | Ip6CancelPacket (IpIf, Packet, Status);\r | |
986 | return Status;\r | |
987 | }\r | |
988 | \r | |
989 | /**\r | |
990 | The filter function to find a packet and all its fragments.\r | |
991 | The packet's fragments have their Context set to the packet.\r | |
992 | \r | |
993 | @param[in] Frame The frames hold by the low level interface.\r | |
994 | @param[in] Context Context to the function, which is the packet.\r | |
995 | \r | |
996 | @retval TRUE This is the packet to cancel or its fragments.\r | |
997 | @retval FALSE This is an unrelated packet.\r | |
998 | \r | |
999 | **/\r | |
1000 | BOOLEAN\r | |
1001 | Ip6CancelPacketFragments (\r | |
1002 | IN IP6_LINK_TX_TOKEN *Frame,\r | |
1003 | IN VOID *Context\r | |
1004 | )\r | |
1005 | {\r | |
1006 | if ((Frame->Packet == (NET_BUF *) Context) || (Frame->Context == Context)) {\r | |
1007 | return TRUE;\r | |
1008 | }\r | |
1009 | \r | |
1010 | return FALSE;\r | |
1011 | }\r | |
1012 | \r | |
1013 | /**\r | |
1014 | Remove all the frames on the interface that pass the FrameToCancel,\r | |
1015 | either queued on ARP queues or that have already been delivered to\r | |
1016 | MNP and not yet recycled.\r | |
1017 | \r | |
1018 | @param[in] Interface Interface to remove the frames from.\r | |
1019 | @param[in] IoStatus The transmit status returned to the frames' callback.\r | |
1020 | @param[in] FrameToCancel Function to select the frame to cancel; NULL to select all.\r | |
1021 | @param[in] Context Opaque parameters passed to FrameToCancel. Ignored if\r | |
1022 | FrameToCancel is NULL.\r | |
1023 | \r | |
1024 | **/\r | |
1025 | VOID\r | |
1026 | Ip6CancelFrames (\r | |
1027 | IN IP6_INTERFACE *Interface,\r | |
1028 | IN EFI_STATUS IoStatus,\r | |
1029 | IN IP6_FRAME_TO_CANCEL FrameToCancel OPTIONAL,\r | |
1030 | IN VOID *Context OPTIONAL\r | |
1031 | )\r | |
1032 | {\r | |
1033 | LIST_ENTRY *Entry;\r | |
1034 | LIST_ENTRY *Next;\r | |
1035 | IP6_LINK_TX_TOKEN *Token;\r | |
1036 | IP6_SERVICE *IpSb;\r | |
1037 | IP6_NEIGHBOR_ENTRY *ArpQue;\r | |
1038 | EFI_STATUS Status;\r | |
1039 | \r | |
1040 | IpSb = Interface->Service;\r | |
1041 | NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);\r | |
1042 | \r | |
1043 | //\r | |
1044 | // Cancel all the pending frames on ARP requests\r | |
1045 | //\r | |
1046 | NET_LIST_FOR_EACH_SAFE (Entry, Next, &Interface->ArpQues) {\r | |
1047 | ArpQue = NET_LIST_USER_STRUCT (Entry, IP6_NEIGHBOR_ENTRY, ArpList);\r | |
1048 | \r | |
1049 | Status = Ip6FreeNeighborEntry (\r | |
1050 | IpSb,\r | |
1051 | ArpQue,\r | |
1052 | FALSE,\r | |
1053 | FALSE,\r | |
1054 | IoStatus,\r | |
1055 | FrameToCancel,\r | |
1056 | Context\r | |
1057 | );\r | |
1058 | ASSERT_EFI_ERROR (Status);\r | |
1059 | }\r | |
1060 | \r | |
1061 | //\r | |
1062 | // Cancel all the frames that have been delivered to MNP\r | |
1063 | // but not yet recycled.\r | |
1064 | //\r | |
1065 | NET_LIST_FOR_EACH_SAFE (Entry, Next, &Interface->SentFrames) {\r | |
1066 | Token = NET_LIST_USER_STRUCT (Entry, IP6_LINK_TX_TOKEN, Link);\r | |
1067 | \r | |
1068 | if ((FrameToCancel == NULL) || FrameToCancel (Token, Context)) {\r | |
1069 | IpSb->Mnp->Cancel (IpSb->Mnp, &Token->MnpToken);\r | |
1070 | }\r | |
1071 | }\r | |
1072 | }\r | |
1073 | \r | |
1074 | /**\r | |
1075 | Cancel the Packet and all its fragments.\r | |
1076 | \r | |
1077 | @param[in] IpIf The interface from which the Packet is sent.\r | |
1078 | @param[in] Packet The Packet to cancel.\r | |
1079 | @param[in] IoStatus The status returns to the sender.\r | |
1080 | \r | |
1081 | **/\r | |
1082 | VOID\r | |
1083 | Ip6CancelPacket (\r | |
1084 | IN IP6_INTERFACE *IpIf,\r | |
1085 | IN NET_BUF *Packet,\r | |
1086 | IN EFI_STATUS IoStatus\r | |
1087 | )\r | |
1088 | {\r | |
1089 | Ip6CancelFrames (IpIf, IoStatus, Ip6CancelPacketFragments, Packet);\r | |
1090 | }\r | |
1091 | \r |