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a3bcde70 HT |
1 | /** @file\r |
2 | Implement IP6 pesudo interface.\r | |
3 | \r | |
f75a7f56 | 4 | Copyright (c) 2009 - 2018, 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 | Request Ip6OnFrameSentDpc as a DPC at TPL_CALLBACK.\r | |
20 | \r | |
21 | @param[in] Event The transmit token's event.\r | |
22 | @param[in] Context The Context which is pointed to the token.\r | |
23 | \r | |
24 | **/\r | |
25 | VOID\r | |
26 | EFIAPI\r | |
27 | Ip6OnFrameSent (\r | |
28 | IN EFI_EVENT Event,\r | |
29 | IN VOID *Context\r | |
30 | );\r | |
31 | \r | |
32 | /**\r | |
33 | Fileter function to cancel all the frame related to an IP instance.\r | |
34 | \r | |
35 | @param[in] Frame The transmit request to test whether to cancel.\r | |
36 | @param[in] Context The context which is the Ip instance that issued\r | |
37 | the transmit.\r | |
38 | \r | |
39 | @retval TRUE The frame belongs to this instance and is to be\r | |
40 | removed.\r | |
41 | @retval FALSE The frame doesn't belong to this instance.\r | |
42 | \r | |
43 | **/\r | |
44 | BOOLEAN\r | |
45 | Ip6CancelInstanceFrame (\r | |
46 | IN IP6_LINK_TX_TOKEN *Frame,\r | |
47 | IN VOID *Context\r | |
48 | )\r | |
49 | {\r | |
50 | if (Frame->IpInstance == (IP6_PROTOCOL *) Context) {\r | |
51 | return TRUE;\r | |
52 | }\r | |
53 | \r | |
54 | return FALSE;\r | |
55 | }\r | |
56 | \r | |
57 | /**\r | |
58 | Set the interface's address. This will trigger the DAD process for the\r | |
59 | address to set. To set an already set address, the lifetimes wil be\r | |
60 | updated to the new value passed in.\r | |
61 | \r | |
62 | @param[in] Interface The interface to set the address.\r | |
63 | @param[in] Ip6Addr The interface's to be assigned IPv6 address.\r | |
64 | @param[in] IsAnycast If TRUE, the unicast IPv6 address is anycast.\r | |
65 | Otherwise, it is not anycast.\r | |
66 | @param[in] PrefixLength The prefix length of the Ip6Addr.\r | |
67 | @param[in] ValidLifetime The valid lifetime for this address.\r | |
68 | @param[in] PreferredLifetime The preferred lifetime for this address.\r | |
69 | @param[in] DadCallback The caller's callback to trigger when DAD finishes.\r | |
70 | This is an optional parameter that may be NULL.\r | |
71 | @param[in] Context The context that will be passed to DadCallback.\r | |
72 | This is an optional parameter that may be NULL.\r | |
73 | \r | |
74 | @retval EFI_SUCCESS The interface is scheduled to be configured with\r | |
75 | the specified address.\r | |
76 | @retval EFI_OUT_OF_RESOURCES Failed to set the interface's address due to\r | |
77 | lack of resources.\r | |
78 | \r | |
79 | **/\r | |
80 | EFI_STATUS\r | |
81 | Ip6SetAddress (\r | |
82 | IN IP6_INTERFACE *Interface,\r | |
83 | IN EFI_IPv6_ADDRESS *Ip6Addr,\r | |
84 | IN BOOLEAN IsAnycast,\r | |
85 | IN UINT8 PrefixLength,\r | |
86 | IN UINT32 ValidLifetime,\r | |
87 | IN UINT32 PreferredLifetime,\r | |
88 | IN IP6_DAD_CALLBACK DadCallback OPTIONAL,\r | |
89 | IN VOID *Context OPTIONAL\r | |
90 | )\r | |
91 | {\r | |
92 | IP6_SERVICE *IpSb;\r | |
93 | IP6_ADDRESS_INFO *AddressInfo;\r | |
94 | LIST_ENTRY *Entry;\r | |
95 | IP6_PREFIX_LIST_ENTRY *PrefixEntry;\r | |
96 | UINT64 Delay;\r | |
97 | IP6_DELAY_JOIN_LIST *DelayNode;\r | |
98 | \r | |
99 | NET_CHECK_SIGNATURE (Interface, IP6_INTERFACE_SIGNATURE);\r | |
100 | \r | |
101 | IpSb = Interface->Service;\r | |
102 | \r | |
103 | if (Ip6IsOneOfSetAddress (IpSb, Ip6Addr, NULL, &AddressInfo)) {\r | |
104 | ASSERT (AddressInfo != NULL);\r | |
105 | //\r | |
106 | // Update the lifetime.\r | |
107 | //\r | |
108 | AddressInfo->ValidLifetime = ValidLifetime;\r | |
109 | AddressInfo->PreferredLifetime = PreferredLifetime;\r | |
110 | \r | |
111 | if (DadCallback != NULL) {\r | |
112 | DadCallback (TRUE, Ip6Addr, Context);\r | |
113 | }\r | |
114 | \r | |
115 | return EFI_SUCCESS;\r | |
116 | }\r | |
117 | \r | |
118 | AddressInfo = (IP6_ADDRESS_INFO *) AllocatePool (sizeof (IP6_ADDRESS_INFO));\r | |
119 | if (AddressInfo == NULL) {\r | |
120 | return EFI_OUT_OF_RESOURCES;\r | |
121 | }\r | |
122 | \r | |
123 | AddressInfo->Signature = IP6_ADDR_INFO_SIGNATURE;\r | |
124 | IP6_COPY_ADDRESS (&AddressInfo->Address, Ip6Addr);\r | |
125 | AddressInfo->IsAnycast = IsAnycast;\r | |
126 | AddressInfo->PrefixLength = PrefixLength;\r | |
127 | AddressInfo->ValidLifetime = ValidLifetime;\r | |
128 | AddressInfo->PreferredLifetime = PreferredLifetime;\r | |
129 | \r | |
130 | if (AddressInfo->PrefixLength == 0) {\r | |
131 | //\r | |
132 | // Find an appropriate prefix from on-link prefixes and update the prefixlength.\r | |
133 | // Longest prefix match is used here.\r | |
134 | //\r | |
135 | NET_LIST_FOR_EACH (Entry, &IpSb->OnlinkPrefix) {\r | |
136 | PrefixEntry = NET_LIST_USER_STRUCT (Entry, IP6_PREFIX_LIST_ENTRY, Link);\r | |
137 | \r | |
138 | if (NetIp6IsNetEqual (&PrefixEntry->Prefix, &AddressInfo->Address, PrefixEntry->PrefixLength)) {\r | |
139 | AddressInfo->PrefixLength = PrefixEntry->PrefixLength;\r | |
140 | break;\r | |
141 | }\r | |
142 | }\r | |
143 | }\r | |
144 | \r | |
145 | if (AddressInfo->PrefixLength == 0) {\r | |
146 | //\r | |
147 | // If the prefix length is still zero, try the autonomous prefixes.\r | |
148 | // Longest prefix match is used here.\r | |
149 | //\r | |
150 | NET_LIST_FOR_EACH (Entry, &IpSb->AutonomousPrefix) {\r | |
151 | PrefixEntry = NET_LIST_USER_STRUCT (Entry, IP6_PREFIX_LIST_ENTRY, Link);\r | |
152 | \r | |
153 | if (NetIp6IsNetEqual (&PrefixEntry->Prefix, &AddressInfo->Address, PrefixEntry->PrefixLength)) {\r | |
154 | AddressInfo->PrefixLength = PrefixEntry->PrefixLength;\r | |
155 | break;\r | |
156 | }\r | |
157 | }\r | |
158 | }\r | |
159 | \r | |
160 | if (AddressInfo->PrefixLength == 0) {\r | |
161 | //\r | |
162 | // BUGBUG: Stil fail, use 64 as the default prefix length.\r | |
163 | //\r | |
164 | AddressInfo->PrefixLength = IP6_LINK_LOCAL_PREFIX_LENGTH;\r | |
165 | }\r | |
166 | \r | |
167 | \r | |
168 | //\r | |
169 | // Node should delay joining the solicited-node mulitcast address by a random delay\r | |
170 | // between 0 and MAX_RTR_SOLICITATION_DELAY (1 second).\r | |
171 | // Thus queue the address to be processed in Duplicate Address Detection module\r | |
172 | // after the delay time (in milliseconds).\r | |
173 | //\r | |
174 | Delay = (UINT64) NET_RANDOM (NetRandomInitSeed ());\r | |
175 | Delay = MultU64x32 (Delay, IP6_ONE_SECOND_IN_MS);\r | |
176 | Delay = RShiftU64 (Delay, 32);\r | |
177 | \r | |
178 | DelayNode = (IP6_DELAY_JOIN_LIST *) AllocatePool (sizeof (IP6_DELAY_JOIN_LIST));\r | |
179 | if (DelayNode == NULL) {\r | |
180 | FreePool (AddressInfo);\r | |
181 | return EFI_OUT_OF_RESOURCES;\r | |
182 | }\r | |
183 | \r | |
184 | DelayNode->DelayTime = (UINT32) (DivU64x32 (Delay, IP6_TIMER_INTERVAL_IN_MS));\r | |
185 | DelayNode->Interface = Interface;\r | |
186 | DelayNode->AddressInfo = AddressInfo;\r | |
187 | DelayNode->DadCallback = DadCallback;\r | |
188 | DelayNode->Context = Context;\r | |
189 | \r | |
190 | InsertTailList (&Interface->DelayJoinList, &DelayNode->Link);\r | |
191 | return EFI_SUCCESS;\r | |
192 | }\r | |
193 | \r | |
194 | /**\r | |
195 | Create an IP6_INTERFACE.\r | |
196 | \r | |
197 | @param[in] IpSb The IP6 service binding instance.\r | |
198 | @param[in] LinkLocal If TRUE, the instance is created for link-local address.\r | |
199 | Otherwise, it is not for a link-local address.\r | |
200 | \r | |
201 | @return Point to the created IP6_INTERFACE, otherwise NULL.\r | |
202 | \r | |
203 | **/\r | |
204 | IP6_INTERFACE *\r | |
205 | Ip6CreateInterface (\r | |
206 | IN IP6_SERVICE *IpSb,\r | |
207 | IN BOOLEAN LinkLocal\r | |
208 | )\r | |
209 | {\r | |
210 | EFI_STATUS Status;\r | |
211 | IP6_INTERFACE *Interface;\r | |
212 | EFI_IPv6_ADDRESS *Ip6Addr;\r | |
213 | \r | |
214 | NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);\r | |
215 | \r | |
216 | Interface = AllocatePool (sizeof (IP6_INTERFACE));\r | |
217 | if (Interface == NULL) {\r | |
218 | return NULL;\r | |
219 | }\r | |
220 | \r | |
221 | Interface->Signature = IP6_INTERFACE_SIGNATURE;\r | |
222 | Interface->RefCnt = 1;\r | |
223 | \r | |
224 | InitializeListHead (&Interface->AddressList);\r | |
225 | Interface->AddressCount = 0;\r | |
226 | Interface->Configured = FALSE;\r | |
227 | \r | |
228 | Interface->Service = IpSb;\r | |
229 | Interface->Controller = IpSb->Controller;\r | |
230 | Interface->Image = IpSb->Image;\r | |
231 | \r | |
232 | InitializeListHead (&Interface->ArpQues);\r | |
233 | InitializeListHead (&Interface->SentFrames);\r | |
234 | \r | |
235 | Interface->DupAddrDetect = IpSb->Ip6ConfigInstance.DadXmits.DupAddrDetectTransmits;\r | |
236 | InitializeListHead (&Interface->DupAddrDetectList);\r | |
237 | \r | |
238 | InitializeListHead (&Interface->DelayJoinList);\r | |
239 | \r | |
240 | InitializeListHead (&Interface->IpInstances);\r | |
241 | Interface->PromiscRecv = FALSE;\r | |
242 | \r | |
243 | if (!LinkLocal) {\r | |
244 | return Interface;\r | |
245 | }\r | |
246 | \r | |
247 | //\r | |
248 | // Get the link local addr\r | |
249 | //\r | |
250 | Ip6Addr = Ip6CreateLinkLocalAddr (IpSb);\r | |
251 | if (Ip6Addr == NULL) {\r | |
252 | goto ON_ERROR;\r | |
253 | }\r | |
254 | \r | |
255 | //\r | |
256 | // Perform DAD - Duplicate Address Detection.\r | |
257 | //\r | |
258 | Status = Ip6SetAddress (\r | |
259 | Interface,\r | |
260 | Ip6Addr,\r | |
261 | FALSE,\r | |
262 | IP6_LINK_LOCAL_PREFIX_LENGTH,\r | |
263 | (UINT32) IP6_INFINIT_LIFETIME,\r | |
264 | (UINT32) IP6_INFINIT_LIFETIME,\r | |
265 | NULL,\r | |
266 | NULL\r | |
267 | );\r | |
268 | \r | |
269 | FreePool (Ip6Addr);\r | |
270 | \r | |
271 | if (EFI_ERROR (Status)) {\r | |
272 | goto ON_ERROR;\r | |
273 | }\r | |
274 | \r | |
275 | return Interface;\r | |
276 | \r | |
277 | ON_ERROR:\r | |
278 | \r | |
279 | FreePool (Interface);\r | |
280 | return NULL;\r | |
281 | }\r | |
282 | \r | |
283 | /**\r | |
284 | Free the interface used by IpInstance. All the IP instance with\r | |
285 | the same Ip/prefix pair share the same interface. It is reference\r | |
286 | counted. All the frames that haven't been sent will be cancelled.\r | |
287 | Because the IpInstance is optional, the caller must remove\r | |
288 | IpInstance from the interface's instance list.\r | |
289 | \r | |
290 | @param[in] Interface The interface used by the IpInstance.\r | |
291 | @param[in] IpInstance The IP instance that free the interface. NULL if\r | |
292 | the IP driver is releasing the default interface.\r | |
293 | \r | |
294 | **/\r | |
295 | VOID\r | |
296 | Ip6CleanInterface (\r | |
297 | IN IP6_INTERFACE *Interface,\r | |
298 | IN IP6_PROTOCOL *IpInstance OPTIONAL\r | |
299 | )\r | |
300 | {\r | |
301 | IP6_DAD_ENTRY *Duplicate;\r | |
302 | IP6_DELAY_JOIN_LIST *Delay;\r | |
303 | \r | |
304 | NET_CHECK_SIGNATURE (Interface, IP6_INTERFACE_SIGNATURE);\r | |
305 | ASSERT (Interface->RefCnt > 0);\r | |
306 | \r | |
307 | //\r | |
308 | // Remove all the pending transmit token related to this IP instance.\r | |
309 | //\r | |
310 | Ip6CancelFrames (Interface, EFI_ABORTED, Ip6CancelInstanceFrame, IpInstance);\r | |
311 | \r | |
312 | if (--Interface->RefCnt > 0) {\r | |
313 | return;\r | |
314 | }\r | |
315 | \r | |
316 | //\r | |
75dce340 | 317 | // Destroy the interface if this is the last IP instance.\r |
a3bcde70 HT |
318 | // Remove all the system transmitted packets\r |
319 | // from this interface, cancel the receive request if exists.\r | |
320 | //\r | |
321 | Ip6CancelFrames (Interface, EFI_ABORTED, Ip6CancelInstanceFrame, NULL);\r | |
322 | \r | |
323 | ASSERT (IsListEmpty (&Interface->IpInstances));\r | |
324 | ASSERT (IsListEmpty (&Interface->ArpQues));\r | |
325 | ASSERT (IsListEmpty (&Interface->SentFrames));\r | |
326 | \r | |
327 | while (!IsListEmpty (&Interface->DupAddrDetectList)) {\r | |
328 | Duplicate = NET_LIST_HEAD (&Interface->DupAddrDetectList, IP6_DAD_ENTRY, Link);\r | |
329 | NetListRemoveHead (&Interface->DupAddrDetectList);\r | |
330 | FreePool (Duplicate);\r | |
331 | }\r | |
332 | \r | |
333 | while (!IsListEmpty (&Interface->DelayJoinList)) {\r | |
334 | Delay = NET_LIST_HEAD (&Interface->DelayJoinList, IP6_DELAY_JOIN_LIST, Link);\r | |
335 | NetListRemoveHead (&Interface->DelayJoinList);\r | |
336 | FreePool (Delay);\r | |
337 | }\r | |
338 | \r | |
339 | Ip6RemoveAddr (Interface->Service, &Interface->AddressList, &Interface->AddressCount, NULL, 0);\r | |
340 | \r | |
341 | RemoveEntryList (&Interface->Link);\r | |
342 | FreePool (Interface);\r | |
343 | }\r | |
344 | \r | |
345 | /**\r | |
346 | Create and wrap a transmit request into a newly allocated IP6_LINK_TX_TOKEN.\r | |
347 | \r | |
348 | @param[in] Interface The interface to send out from.\r | |
349 | @param[in] IpInstance The IpInstance that transmit the packet. NULL if\r | |
350 | the packet is sent by the IP6 driver itself.\r | |
351 | @param[in] Packet The packet to transmit\r | |
352 | @param[in] CallBack Call back function to execute if transmission\r | |
353 | finished.\r | |
354 | @param[in] Context Opaque parameter to the callback.\r | |
355 | \r | |
356 | @return The wrapped token if succeed or NULL.\r | |
357 | \r | |
358 | **/\r | |
359 | IP6_LINK_TX_TOKEN *\r | |
360 | Ip6CreateLinkTxToken (\r | |
361 | IN IP6_INTERFACE *Interface,\r | |
362 | IN IP6_PROTOCOL *IpInstance OPTIONAL,\r | |
363 | IN NET_BUF *Packet,\r | |
364 | IN IP6_FRAME_CALLBACK CallBack,\r | |
365 | IN VOID *Context\r | |
366 | )\r | |
367 | {\r | |
368 | EFI_MANAGED_NETWORK_COMPLETION_TOKEN *MnpToken;\r | |
369 | EFI_MANAGED_NETWORK_TRANSMIT_DATA *MnpTxData;\r | |
370 | IP6_LINK_TX_TOKEN *Token;\r | |
371 | EFI_STATUS Status;\r | |
372 | UINT32 Count;\r | |
373 | \r | |
374 | Token = AllocatePool (sizeof (IP6_LINK_TX_TOKEN) + (Packet->BlockOpNum - 1) * sizeof (EFI_MANAGED_NETWORK_FRAGMENT_DATA));\r | |
375 | \r | |
376 | if (Token == NULL) {\r | |
377 | return NULL;\r | |
378 | }\r | |
379 | \r | |
380 | Token->Signature = IP6_LINK_TX_SIGNATURE;\r | |
381 | InitializeListHead (&Token->Link);\r | |
382 | \r | |
383 | Token->IpInstance = IpInstance;\r | |
384 | Token->CallBack = CallBack;\r | |
385 | Token->Packet = Packet;\r | |
386 | Token->Context = Context;\r | |
387 | ZeroMem (&Token->DstMac, sizeof (EFI_MAC_ADDRESS));\r | |
388 | IP6_COPY_LINK_ADDRESS (&Token->SrcMac, &Interface->Service->SnpMode.CurrentAddress);\r | |
389 | \r | |
390 | MnpToken = &(Token->MnpToken);\r | |
391 | MnpToken->Status = EFI_NOT_READY;\r | |
392 | \r | |
393 | Status = gBS->CreateEvent (\r | |
394 | EVT_NOTIFY_SIGNAL,\r | |
395 | TPL_NOTIFY,\r | |
396 | Ip6OnFrameSent,\r | |
397 | Token,\r | |
398 | &MnpToken->Event\r | |
399 | );\r | |
400 | \r | |
401 | if (EFI_ERROR (Status)) {\r | |
402 | FreePool (Token);\r | |
403 | return NULL;\r | |
404 | }\r | |
405 | \r | |
406 | MnpTxData = &Token->MnpTxData;\r | |
407 | MnpToken->Packet.TxData = MnpTxData;\r | |
408 | \r | |
409 | MnpTxData->DestinationAddress = &Token->DstMac;\r | |
410 | MnpTxData->SourceAddress = &Token->SrcMac;\r | |
411 | MnpTxData->ProtocolType = IP6_ETHER_PROTO;\r | |
412 | MnpTxData->DataLength = Packet->TotalSize;\r | |
413 | MnpTxData->HeaderLength = 0;\r | |
414 | \r | |
415 | Count = Packet->BlockOpNum;\r | |
416 | \r | |
417 | NetbufBuildExt (Packet, (NET_FRAGMENT *) MnpTxData->FragmentTable, &Count);\r | |
418 | MnpTxData->FragmentCount = (UINT16)Count;\r | |
419 | \r | |
420 | return Token;\r | |
421 | }\r | |
422 | \r | |
423 | /**\r | |
424 | Free the link layer transmit token. It will close the event,\r | |
425 | then free the memory used.\r | |
426 | \r | |
427 | @param[in] Token Token to free.\r | |
428 | \r | |
429 | **/\r | |
430 | VOID\r | |
431 | Ip6FreeLinkTxToken (\r | |
432 | IN IP6_LINK_TX_TOKEN *Token\r | |
433 | )\r | |
434 | {\r | |
435 | NET_CHECK_SIGNATURE (Token, IP6_LINK_TX_SIGNATURE);\r | |
436 | \r | |
437 | gBS->CloseEvent (Token->MnpToken.Event);\r | |
438 | FreePool (Token);\r | |
439 | }\r | |
440 | \r | |
441 | /**\r | |
442 | Callback function when the received packet is freed.\r | |
443 | Check Ip6OnFrameReceived for information.\r | |
444 | \r | |
445 | @param[in] Context Points to EFI_MANAGED_NETWORK_RECEIVE_DATA.\r | |
446 | \r | |
447 | **/\r | |
448 | VOID\r | |
449 | EFIAPI\r | |
450 | Ip6RecycleFrame (\r | |
451 | IN VOID *Context\r | |
452 | )\r | |
453 | {\r | |
454 | EFI_MANAGED_NETWORK_RECEIVE_DATA *RxData;\r | |
455 | \r | |
456 | RxData = (EFI_MANAGED_NETWORK_RECEIVE_DATA *) Context;\r | |
457 | \r | |
458 | gBS->SignalEvent (RxData->RecycleEvent);\r | |
459 | }\r | |
460 | \r | |
461 | /**\r | |
462 | Received a frame from MNP. Wrap it in net buffer then deliver\r | |
463 | it to IP's input function. The ownship of the packet also\r | |
464 | is transferred to IP. When Ip is finished with this packet, it\r | |
465 | will call NetbufFree to release the packet, NetbufFree will\r | |
466 | again call the Ip6RecycleFrame to signal MNP's event and free\r | |
467 | the token used.\r | |
468 | \r | |
469 | @param[in] Context Context for the callback.\r | |
470 | \r | |
471 | **/\r | |
472 | VOID\r | |
473 | EFIAPI\r | |
474 | Ip6OnFrameReceivedDpc (\r | |
475 | IN VOID *Context\r | |
476 | )\r | |
477 | {\r | |
478 | EFI_MANAGED_NETWORK_COMPLETION_TOKEN *MnpToken;\r | |
479 | EFI_MANAGED_NETWORK_RECEIVE_DATA *MnpRxData;\r | |
480 | IP6_LINK_RX_TOKEN *Token;\r | |
481 | NET_FRAGMENT Netfrag;\r | |
482 | NET_BUF *Packet;\r | |
483 | UINT32 Flag;\r | |
484 | IP6_SERVICE *IpSb;\r | |
485 | \r | |
486 | Token = (IP6_LINK_RX_TOKEN *) Context;\r | |
487 | NET_CHECK_SIGNATURE (Token, IP6_LINK_RX_SIGNATURE);\r | |
488 | \r | |
489 | //\r | |
490 | // First clear the interface's receive request in case the\r | |
491 | // caller wants to call Ip6ReceiveFrame in the callback.\r | |
492 | //\r | |
493 | IpSb = (IP6_SERVICE *) Token->Context;\r | |
494 | NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);\r | |
495 | \r | |
496 | \r | |
497 | MnpToken = &Token->MnpToken;\r | |
498 | MnpRxData = MnpToken->Packet.RxData;\r | |
499 | \r | |
500 | if (EFI_ERROR (MnpToken->Status) || (MnpRxData == NULL)) {\r | |
501 | Token->CallBack (NULL, MnpToken->Status, 0, Token->Context);\r | |
502 | return ;\r | |
503 | }\r | |
504 | \r | |
505 | //\r | |
506 | // Wrap the frame in a net buffer then deliever it to IP input.\r | |
507 | // IP will reassemble the packet, and deliver it to upper layer\r | |
508 | //\r | |
509 | Netfrag.Len = MnpRxData->DataLength;\r | |
510 | Netfrag.Bulk = MnpRxData->PacketData;\r | |
511 | \r | |
512 | Packet = NetbufFromExt (&Netfrag, 1, IP6_MAX_HEADLEN, 0, Ip6RecycleFrame, Token->MnpToken.Packet.RxData);\r | |
513 | \r | |
514 | if (Packet == NULL) {\r | |
515 | gBS->SignalEvent (MnpRxData->RecycleEvent);\r | |
516 | \r | |
517 | Token->CallBack (NULL, EFI_OUT_OF_RESOURCES, 0, Token->Context);\r | |
518 | \r | |
519 | return ;\r | |
520 | }\r | |
521 | \r | |
522 | Flag = (MnpRxData->BroadcastFlag ? IP6_LINK_BROADCAST : 0);\r | |
523 | Flag |= (MnpRxData->MulticastFlag ? IP6_LINK_MULTICAST : 0);\r | |
524 | Flag |= (MnpRxData->PromiscuousFlag ? IP6_LINK_PROMISC : 0);\r | |
525 | \r | |
526 | Token->CallBack (Packet, EFI_SUCCESS, Flag, Token->Context);\r | |
527 | }\r | |
528 | \r | |
529 | /**\r | |
530 | Request Ip6OnFrameReceivedDpc as a DPC at TPL_CALLBACK.\r | |
531 | \r | |
532 | @param Event The receive event delivered to MNP for receive.\r | |
533 | @param Context Context for the callback.\r | |
534 | \r | |
535 | **/\r | |
536 | VOID\r | |
537 | EFIAPI\r | |
538 | Ip6OnFrameReceived (\r | |
539 | IN EFI_EVENT Event,\r | |
540 | IN VOID *Context\r | |
541 | )\r | |
542 | {\r | |
543 | //\r | |
544 | // Request Ip6OnFrameReceivedDpc as a DPC at TPL_CALLBACK\r | |
545 | //\r | |
546 | QueueDpc (TPL_CALLBACK, Ip6OnFrameReceivedDpc, Context);\r | |
547 | }\r | |
548 | \r | |
549 | /**\r | |
550 | Request to receive the packet from the interface.\r | |
551 | \r | |
552 | @param[in] CallBack Function to call when receive finished.\r | |
553 | @param[in] IpSb Points to IP6 service binding instance.\r | |
554 | \r | |
555 | @retval EFI_ALREADY_STARTED There is already a pending receive request.\r | |
556 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resource to receive.\r | |
557 | @retval EFI_SUCCESS The recieve request has been started.\r | |
558 | \r | |
559 | **/\r | |
560 | EFI_STATUS\r | |
561 | Ip6ReceiveFrame (\r | |
562 | IN IP6_FRAME_CALLBACK CallBack,\r | |
563 | IN IP6_SERVICE *IpSb\r | |
564 | )\r | |
565 | {\r | |
566 | EFI_STATUS Status;\r | |
567 | IP6_LINK_RX_TOKEN *Token;\r | |
f75a7f56 | 568 | \r |
a3bcde70 HT |
569 | NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);\r |
570 | \r | |
571 | Token = &IpSb->RecvRequest;\r | |
572 | Token->CallBack = CallBack;\r | |
573 | Token->Context = (VOID *) IpSb;\r | |
574 | \r | |
575 | Status = IpSb->Mnp->Receive (IpSb->Mnp, &Token->MnpToken);\r | |
576 | if (EFI_ERROR (Status)) {\r | |
577 | return Status;\r | |
578 | }\r | |
579 | \r | |
580 | return EFI_SUCCESS;\r | |
581 | }\r | |
582 | \r | |
583 | /**\r | |
584 | Callback funtion when frame transmission is finished. It will\r | |
585 | call the frame owner's callback function to tell it the result.\r | |
586 | \r | |
587 | @param[in] Context Context which points to the token.\r | |
588 | \r | |
589 | **/\r | |
590 | VOID\r | |
591 | EFIAPI\r | |
592 | Ip6OnFrameSentDpc (\r | |
593 | IN VOID *Context\r | |
594 | )\r | |
595 | {\r | |
596 | IP6_LINK_TX_TOKEN *Token;\r | |
597 | \r | |
598 | Token = (IP6_LINK_TX_TOKEN *) Context;\r | |
599 | NET_CHECK_SIGNATURE (Token, IP6_LINK_TX_SIGNATURE);\r | |
600 | \r | |
601 | RemoveEntryList (&Token->Link);\r | |
602 | \r | |
603 | Token->CallBack (\r | |
604 | Token->Packet,\r | |
605 | Token->MnpToken.Status,\r | |
606 | 0,\r | |
607 | Token->Context\r | |
608 | );\r | |
609 | \r | |
610 | Ip6FreeLinkTxToken (Token);\r | |
611 | }\r | |
612 | \r | |
613 | /**\r | |
614 | Request Ip6OnFrameSentDpc as a DPC at TPL_CALLBACK.\r | |
615 | \r | |
616 | @param[in] Event The transmit token's event.\r | |
617 | @param[in] Context Context which points to the token.\r | |
618 | \r | |
619 | **/\r | |
620 | VOID\r | |
621 | EFIAPI\r | |
622 | Ip6OnFrameSent (\r | |
623 | IN EFI_EVENT Event,\r | |
624 | IN VOID *Context\r | |
625 | )\r | |
626 | {\r | |
627 | //\r | |
628 | // Request Ip6OnFrameSentDpc as a DPC at TPL_CALLBACK\r | |
629 | //\r | |
630 | QueueDpc (TPL_CALLBACK, Ip6OnFrameSentDpc, Context);\r | |
631 | }\r | |
632 | \r | |
633 | /**\r | |
634 | Send a frame from the interface. If the next hop is a multicast address,\r | |
635 | it is transmitted immediately. If the next hop is a unicast,\r | |
636 | and the NextHop's MAC is not known, it will perform address resolution.\r | |
637 | If an error occurred, the CallBack won't be called. So, the caller\r | |
638 | must test the return value, and take action when there is an error.\r | |
639 | \r | |
640 | @param[in] Interface The interface to send the frame from\r | |
641 | @param[in] IpInstance The IP child that request the transmission.\r | |
642 | NULL if it is the IP6 driver itself.\r | |
643 | @param[in] Packet The packet to transmit.\r | |
644 | @param[in] NextHop The immediate destination to transmit the packet to.\r | |
645 | @param[in] CallBack Function to call back when transmit finished.\r | |
646 | @param[in] Context Opaque parameter to the callback.\r | |
647 | \r | |
648 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resource to send the frame.\r | |
649 | @retval EFI_NO_MAPPING Can't resolve the MAC for the nexthop.\r | |
650 | @retval EFI_SUCCESS The packet successfully transmitted.\r | |
651 | \r | |
652 | **/\r | |
653 | EFI_STATUS\r | |
654 | Ip6SendFrame (\r | |
655 | IN IP6_INTERFACE *Interface,\r | |
656 | IN IP6_PROTOCOL *IpInstance OPTIONAL,\r | |
657 | IN NET_BUF *Packet,\r | |
658 | IN EFI_IPv6_ADDRESS *NextHop,\r | |
659 | IN IP6_FRAME_CALLBACK CallBack,\r | |
660 | IN VOID *Context\r | |
661 | )\r | |
662 | {\r | |
663 | IP6_SERVICE *IpSb;\r | |
664 | IP6_LINK_TX_TOKEN *Token;\r | |
665 | EFI_STATUS Status;\r | |
666 | IP6_NEIGHBOR_ENTRY *NeighborCache;\r | |
667 | LIST_ENTRY *Entry;\r | |
668 | IP6_NEIGHBOR_ENTRY *ArpQue;\r | |
669 | \r | |
670 | IpSb = Interface->Service;\r | |
671 | NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);\r | |
672 | \r | |
673 | //\r | |
674 | // Only when link local address is performing DAD, the interface could be used in unconfigured.\r | |
675 | //\r | |
676 | if (IpSb->LinkLocalOk) {\r | |
677 | ASSERT (Interface->Configured);\r | |
678 | }\r | |
679 | \r | |
680 | Token = Ip6CreateLinkTxToken (Interface, IpInstance, Packet, CallBack, Context);\r | |
681 | \r | |
682 | if (Token == NULL) {\r | |
683 | return EFI_OUT_OF_RESOURCES;\r | |
684 | }\r | |
685 | \r | |
686 | if (IP6_IS_MULTICAST (NextHop)) {\r | |
687 | Status = Ip6GetMulticastMac (IpSb->Mnp, NextHop, &Token->DstMac);\r | |
688 | if (EFI_ERROR (Status)) {\r | |
689 | goto Error;\r | |
690 | }\r | |
691 | \r | |
692 | goto SendNow;\r | |
693 | }\r | |
694 | \r | |
695 | //\r | |
696 | // If send to itself, directly send out\r | |
697 | //\r | |
698 | if (EFI_IP6_EQUAL (&Packet->Ip.Ip6->DestinationAddress, &Packet->Ip.Ip6->SourceAddress)) {\r | |
699 | IP6_COPY_LINK_ADDRESS (&Token->DstMac, &IpSb->SnpMode.CurrentAddress);\r | |
700 | goto SendNow;\r | |
701 | }\r | |
702 | \r | |
703 | //\r | |
704 | // If unicast, check the neighbor state.\r | |
705 | //\r | |
706 | \r | |
707 | NeighborCache = Ip6FindNeighborEntry (IpSb, NextHop);\r | |
708 | ASSERT (NeighborCache != NULL);\r | |
709 | \r | |
710 | if (NeighborCache->Interface == NULL) {\r | |
711 | NeighborCache->Interface = Interface;\r | |
712 | }\r | |
713 | \r | |
714 | switch (NeighborCache->State) {\r | |
715 | case EfiNeighborStale:\r | |
716 | NeighborCache->State = EfiNeighborDelay;\r | |
717 | NeighborCache->Ticks = (UINT32) IP6_GET_TICKS (IP6_DELAY_FIRST_PROBE_TIME);\r | |
718 | //\r | |
719 | // Fall through\r | |
720 | //\r | |
721 | case EfiNeighborReachable:\r | |
722 | case EfiNeighborDelay:\r | |
723 | case EfiNeighborProbe:\r | |
724 | IP6_COPY_LINK_ADDRESS (&Token->DstMac, &NeighborCache->LinkAddress);\r | |
725 | goto SendNow;\r | |
726 | break;\r | |
727 | \r | |
728 | default:\r | |
729 | break;\r | |
730 | }\r | |
731 | \r | |
732 | //\r | |
733 | // Have to do asynchronous ARP resolution. First check whether there is\r | |
734 | // already a pending request.\r | |
735 | //\r | |
736 | NET_LIST_FOR_EACH (Entry, &Interface->ArpQues) {\r | |
737 | ArpQue = NET_LIST_USER_STRUCT (Entry, IP6_NEIGHBOR_ENTRY, ArpList);\r | |
738 | if (ArpQue == NeighborCache) {\r | |
739 | InsertTailList (&NeighborCache->Frames, &Token->Link);\r | |
740 | NeighborCache->ArpFree = TRUE;\r | |
741 | return EFI_SUCCESS;\r | |
742 | }\r | |
743 | }\r | |
744 | \r | |
745 | //\r | |
746 | // First frame requires ARP.\r | |
747 | //\r | |
748 | InsertTailList (&NeighborCache->Frames, &Token->Link);\r | |
749 | InsertTailList (&Interface->ArpQues, &NeighborCache->ArpList);\r | |
750 | \r | |
751 | NeighborCache->ArpFree = TRUE;\r | |
752 | \r | |
753 | return EFI_SUCCESS;\r | |
754 | \r | |
755 | SendNow:\r | |
756 | //\r | |
757 | // Insert the tx token into the SentFrames list before calling Mnp->Transmit.\r | |
758 | // Remove it if the returned status is not EFI_SUCCESS.\r | |
759 | //\r | |
760 | InsertTailList (&Interface->SentFrames, &Token->Link);\r | |
761 | Status = IpSb->Mnp->Transmit (IpSb->Mnp, &Token->MnpToken);\r | |
762 | if (EFI_ERROR (Status)) {\r | |
763 | RemoveEntryList (&Token->Link);\r | |
764 | goto Error;\r | |
765 | }\r | |
766 | \r | |
767 | return EFI_SUCCESS;\r | |
768 | \r | |
769 | Error:\r | |
770 | Ip6FreeLinkTxToken (Token);\r | |
771 | return Status;\r | |
772 | }\r | |
773 | \r | |
774 | /**\r | |
775 | The heartbeat timer of IP6 service instance. It times out\r | |
776 | all of its IP6 children's received-but-not-delivered and\r | |
777 | transmitted-but-not-recycle packets.\r | |
778 | \r | |
779 | @param[in] Event The IP6 service instance's heartbeat timer.\r | |
780 | @param[in] Context The IP6 service instance.\r | |
781 | \r | |
782 | **/\r | |
783 | VOID\r | |
784 | EFIAPI\r | |
785 | Ip6TimerTicking (\r | |
786 | IN EFI_EVENT Event,\r | |
787 | IN VOID *Context\r | |
788 | )\r | |
789 | {\r | |
790 | IP6_SERVICE *IpSb;\r | |
791 | \r | |
792 | IpSb = (IP6_SERVICE *) Context;\r | |
793 | NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);\r | |
794 | \r | |
795 | Ip6PacketTimerTicking (IpSb);\r | |
796 | Ip6NdTimerTicking (IpSb);\r | |
797 | Ip6MldTimerTicking (IpSb);\r | |
798 | }\r |