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1 /** @file
2 DnsDxe support functions implementation.
3
4 Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
9
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12
13 **/
14
15 #include "DnsImpl.h"
16
17 /**
18 Remove TokenEntry from TokenMap.
19
20 @param[in] TokenMap All DNSv4 Token entrys.
21 @param[in] TokenEntry TokenEntry need to be removed.
22
23 @retval EFI_SUCCESS Remove TokenEntry from TokenMap sucessfully.
24 @retval EFI_NOT_FOUND TokenEntry is not found in TokenMap.
25
26 **/
27 EFI_STATUS
28 Dns4RemoveTokenEntry (
29 IN NET_MAP *TokenMap,
30 IN DNS4_TOKEN_ENTRY *TokenEntry
31 )
32 {
33 NET_MAP_ITEM *Item;
34
35 //
36 // Find the TokenEntry first.
37 //
38 Item = NetMapFindKey (TokenMap, (VOID *) TokenEntry);
39
40 if (Item != NULL) {
41 //
42 // Remove the TokenEntry if it's found in the map.
43 //
44 NetMapRemoveItem (TokenMap, Item, NULL);
45
46 return EFI_SUCCESS;
47 }
48
49 return EFI_NOT_FOUND;
50 }
51
52 /**
53 Remove TokenEntry from TokenMap.
54
55 @param[in] TokenMap All DNSv6 Token entrys.
56 @param[in] TokenEntry TokenEntry need to be removed.
57
58 @retval EFI_SUCCESS Remove TokenEntry from TokenMap sucessfully.
59 @retval EFI_NOT_FOUND TokenEntry is not found in TokenMap.
60
61 **/
62 EFI_STATUS
63 Dns6RemoveTokenEntry (
64 IN NET_MAP *TokenMap,
65 IN DNS6_TOKEN_ENTRY *TokenEntry
66 )
67 {
68 NET_MAP_ITEM *Item;
69
70 //
71 // Find the TokenEntry first.
72 //
73 Item = NetMapFindKey (TokenMap, (VOID *) TokenEntry);
74
75 if (Item != NULL) {
76 //
77 // Remove the TokenEntry if it's found in the map.
78 //
79 NetMapRemoveItem (TokenMap, Item, NULL);
80
81 return EFI_SUCCESS;
82 }
83
84 return EFI_NOT_FOUND;
85 }
86
87 /**
88 This function cancle the token specified by Arg in the Map.
89
90 @param[in] Map Pointer to the NET_MAP.
91 @param[in] Item Pointer to the NET_MAP_ITEM.
92 @param[in] Arg Pointer to the token to be cancelled. If NULL, all
93 the tokens in this Map will be cancelled.
94 This parameter is optional and may be NULL.
95
96 @retval EFI_SUCCESS The token is cancelled if Arg is NULL, or the token
97 is not the same as that in the Item, if Arg is not
98 NULL.
99 @retval EFI_ABORTED Arg is not NULL, and the token specified by Arg is
100 cancelled.
101
102 **/
103 EFI_STATUS
104 EFIAPI
105 Dns4CancelTokens (
106 IN NET_MAP *Map,
107 IN NET_MAP_ITEM *Item,
108 IN VOID *Arg OPTIONAL
109 )
110 {
111 DNS4_TOKEN_ENTRY *TokenEntry;
112 NET_BUF *Packet;
113 UDP_IO *UdpIo;
114
115 if ((Arg != NULL) && (Item->Key != Arg)) {
116 return EFI_SUCCESS;
117 }
118
119 if (Item->Value != NULL) {
120 //
121 // If the TokenEntry is a transmit TokenEntry, the corresponding Packet is recorded in
122 // Item->Value.
123 //
124 Packet = (NET_BUF *) (Item->Value);
125 UdpIo = (UDP_IO *) (*((UINTN *) &Packet->ProtoData[0]));
126
127 UdpIoCancelSentDatagram (UdpIo, Packet);
128 }
129
130 //
131 // Remove TokenEntry from Dns4TxTokens.
132 //
133 TokenEntry = (DNS4_TOKEN_ENTRY *) Item->Key;
134 if (Dns4RemoveTokenEntry (Map, TokenEntry) == EFI_SUCCESS) {
135 TokenEntry->Token->Status = EFI_ABORTED;
136 gBS->SignalEvent (TokenEntry->Token->Event);
137 DispatchDpc ();
138 }
139
140 if (Arg != NULL) {
141 return EFI_ABORTED;
142 }
143
144 return EFI_SUCCESS;
145 }
146
147 /**
148 This function cancle the token specified by Arg in the Map.
149
150 @param[in] Map Pointer to the NET_MAP.
151 @param[in] Item Pointer to the NET_MAP_ITEM.
152 @param[in] Arg Pointer to the token to be cancelled. If NULL, all
153 the tokens in this Map will be cancelled.
154 This parameter is optional and may be NULL.
155
156 @retval EFI_SUCCESS The token is cancelled if Arg is NULL, or the token
157 is not the same as that in the Item, if Arg is not
158 NULL.
159 @retval EFI_ABORTED Arg is not NULL, and the token specified by Arg is
160 cancelled.
161
162 **/
163 EFI_STATUS
164 EFIAPI
165 Dns6CancelTokens (
166 IN NET_MAP *Map,
167 IN NET_MAP_ITEM *Item,
168 IN VOID *Arg OPTIONAL
169 )
170 {
171 DNS6_TOKEN_ENTRY *TokenEntry;
172 NET_BUF *Packet;
173 UDP_IO *UdpIo;
174
175 if ((Arg != NULL) && (Item->Key != Arg)) {
176 return EFI_SUCCESS;
177 }
178
179 if (Item->Value != NULL) {
180 //
181 // If the TokenEntry is a transmit TokenEntry, the corresponding Packet is recorded in
182 // Item->Value.
183 //
184 Packet = (NET_BUF *) (Item->Value);
185 UdpIo = (UDP_IO *) (*((UINTN *) &Packet->ProtoData[0]));
186
187 UdpIoCancelSentDatagram (UdpIo, Packet);
188 }
189
190 //
191 // Remove TokenEntry from Dns6TxTokens.
192 //
193 TokenEntry = (DNS6_TOKEN_ENTRY *) Item->Key;
194 if (Dns6RemoveTokenEntry (Map, TokenEntry) == EFI_SUCCESS) {
195 TokenEntry->Token->Status = EFI_ABORTED;
196 gBS->SignalEvent (TokenEntry->Token->Event);
197 DispatchDpc ();
198 }
199
200 if (Arg != NULL) {
201 return EFI_ABORTED;
202 }
203
204 return EFI_SUCCESS;
205 }
206
207 /**
208 Get the TokenEntry from the TokensMap.
209
210 @param[in] TokensMap All DNSv4 Token entrys
211 @param[in] Token Pointer to the token to be get.
212 @param[out] TokenEntry Pointer to TokenEntry corresponding Token.
213
214 @retval EFI_SUCCESS Get the TokenEntry from the TokensMap sucessfully.
215 @retval EFI_NOT_FOUND TokenEntry is not found in TokenMap.
216
217 **/
218 EFI_STATUS
219 EFIAPI
220 GetDns4TokenEntry (
221 IN NET_MAP *TokensMap,
222 IN EFI_DNS4_COMPLETION_TOKEN *Token,
223 OUT DNS4_TOKEN_ENTRY **TokenEntry
224 )
225 {
226 LIST_ENTRY *Entry;
227
228 NET_MAP_ITEM *Item;
229
230 NET_LIST_FOR_EACH (Entry, &TokensMap->Used) {
231 Item = NET_LIST_USER_STRUCT (Entry, NET_MAP_ITEM, Link);
232 *TokenEntry = (DNS4_TOKEN_ENTRY *) (Item->Key);
233 if ((*TokenEntry)->Token == Token) {
234 return EFI_SUCCESS;
235 }
236 }
237
238 *TokenEntry = NULL;
239
240 return EFI_NOT_FOUND;
241 }
242
243 /**
244 Get the TokenEntry from the TokensMap.
245
246 @param[in] TokensMap All DNSv6 Token entrys
247 @param[in] Token Pointer to the token to be get.
248 @param[out] TokenEntry Pointer to TokenEntry corresponding Token.
249
250 @retval EFI_SUCCESS Get the TokenEntry from the TokensMap sucessfully.
251 @retval EFI_NOT_FOUND TokenEntry is not found in TokenMap.
252
253 **/
254 EFI_STATUS
255 EFIAPI
256 GetDns6TokenEntry (
257 IN NET_MAP *TokensMap,
258 IN EFI_DNS6_COMPLETION_TOKEN *Token,
259 OUT DNS6_TOKEN_ENTRY **TokenEntry
260 )
261 {
262 LIST_ENTRY *Entry;
263
264 NET_MAP_ITEM *Item;
265
266 NET_LIST_FOR_EACH (Entry, &TokensMap->Used) {
267 Item = NET_LIST_USER_STRUCT (Entry, NET_MAP_ITEM, Link);
268 *TokenEntry = (DNS6_TOKEN_ENTRY *) (Item->Key);
269 if ((*TokenEntry)->Token == Token) {
270 return EFI_SUCCESS;
271 }
272 }
273
274 *TokenEntry =NULL;
275
276 return EFI_NOT_FOUND;
277 }
278
279 /**
280 Cancel DNS4 tokens from the DNS4 instance.
281
282 @param[in] Instance Pointer to the DNS instance context data.
283 @param[in] Token Pointer to the token to be canceled. If NULL, all
284 tokens in this instance will be cancelled.
285 This parameter is optional and may be NULL.
286
287 @retval EFI_SUCCESS The Token is cancelled.
288 @retval EFI_NOT_FOUND The Token is not found.
289
290 **/
291 EFI_STATUS
292 Dns4InstanceCancelToken (
293 IN DNS_INSTANCE *Instance,
294 IN EFI_DNS4_COMPLETION_TOKEN *Token
295 )
296 {
297 EFI_STATUS Status;
298 DNS4_TOKEN_ENTRY *TokenEntry;
299
300 TokenEntry = NULL;
301
302 if(Token != NULL ) {
303 Status = GetDns4TokenEntry (&Instance->Dns4TxTokens, Token, &TokenEntry);
304 if (EFI_ERROR (Status)) {
305 return Status;
306 }
307 } else {
308 TokenEntry = NULL;
309 }
310
311 //
312 // Cancel this TokenEntry from the Dns4TxTokens map.
313 //
314 Status = NetMapIterate (&Instance->Dns4TxTokens, Dns4CancelTokens, TokenEntry);
315
316 if ((TokenEntry != NULL) && (Status == EFI_ABORTED)) {
317 //
318 // If Token isn't NULL and Status is EFI_ABORTED, the token is cancelled from
319 // the Dns4TxTokens and returns success.
320 //
321 if (NetMapIsEmpty (&Instance->Dns4TxTokens)) {
322 Instance->UdpIo->Protocol.Udp4->Cancel (Instance->UdpIo->Protocol.Udp4, &Instance->UdpIo->RecvRequest->Token.Udp4);
323 }
324 return EFI_SUCCESS;
325 }
326
327 ASSERT ((TokenEntry != NULL) || (0 == NetMapGetCount (&Instance->Dns4TxTokens)));
328
329 if (NetMapIsEmpty (&Instance->Dns4TxTokens)) {
330 Instance->UdpIo->Protocol.Udp4->Cancel (Instance->UdpIo->Protocol.Udp4, &Instance->UdpIo->RecvRequest->Token.Udp4);
331 }
332
333 return EFI_SUCCESS;
334 }
335
336 /**
337 Cancel DNS6 tokens from the DNS6 instance.
338
339 @param[in] Instance Pointer to the DNS instance context data.
340 @param[in] Token Pointer to the token to be canceled. If NULL, all
341 tokens in this instance will be cancelled.
342 This parameter is optional and may be NULL.
343
344 @retval EFI_SUCCESS The Token is cancelled.
345 @retval EFI_NOT_FOUND The Token is not found.
346
347 **/
348 EFI_STATUS
349 Dns6InstanceCancelToken (
350 IN DNS_INSTANCE *Instance,
351 IN EFI_DNS6_COMPLETION_TOKEN *Token
352 )
353 {
354 EFI_STATUS Status;
355 DNS6_TOKEN_ENTRY *TokenEntry;
356
357 TokenEntry = NULL;
358
359 if(Token != NULL ) {
360 Status = GetDns6TokenEntry (&Instance->Dns6TxTokens, Token, &TokenEntry);
361 if (EFI_ERROR (Status)) {
362 return Status;
363 }
364 } else {
365 TokenEntry = NULL;
366 }
367
368 //
369 // Cancel this TokenEntry from the Dns6TxTokens map.
370 //
371 Status = NetMapIterate (&Instance->Dns6TxTokens, Dns6CancelTokens, TokenEntry);
372
373 if ((TokenEntry != NULL) && (Status == EFI_ABORTED)) {
374 //
375 // If Token isn't NULL and Status is EFI_ABORTED, the token is cancelled from
376 // the Dns6TxTokens and returns success.
377 //
378 if (NetMapIsEmpty (&Instance->Dns6TxTokens)) {
379 Instance->UdpIo->Protocol.Udp6->Cancel (Instance->UdpIo->Protocol.Udp6, &Instance->UdpIo->RecvRequest->Token.Udp6);
380 }
381 return EFI_SUCCESS;
382 }
383
384 ASSERT ((TokenEntry != NULL) || (0 == NetMapGetCount (&Instance->Dns6TxTokens)));
385
386 if (NetMapIsEmpty (&Instance->Dns6TxTokens)) {
387 Instance->UdpIo->Protocol.Udp6->Cancel (Instance->UdpIo->Protocol.Udp6, &Instance->UdpIo->RecvRequest->Token.Udp6);
388 }
389
390 return EFI_SUCCESS;
391 }
392
393 /**
394 Free the resource related to the configure parameters.
395
396 @param Config The DNS configure data
397
398 **/
399 VOID
400 Dns4CleanConfigure (
401 IN OUT EFI_DNS4_CONFIG_DATA *Config
402 )
403 {
404 if (Config->DnsServerList != NULL) {
405 FreePool (Config->DnsServerList);
406 }
407
408 ZeroMem (Config, sizeof (EFI_DNS4_CONFIG_DATA));
409 }
410
411 /**
412 Free the resource related to the configure parameters.
413
414 @param Config The DNS configure data
415
416 **/
417 VOID
418 Dns6CleanConfigure (
419 IN OUT EFI_DNS6_CONFIG_DATA *Config
420 )
421 {
422 if (Config->DnsServerList != NULL) {
423 FreePool (Config->DnsServerList);
424 }
425
426 ZeroMem (Config, sizeof (EFI_DNS6_CONFIG_DATA));
427 }
428
429 /**
430 Allocate memory for configure parameter such as timeout value for Dst,
431 then copy the configure parameter from Src to Dst.
432
433 @param[out] Dst The destination DHCP configure data.
434 @param[in] Src The source DHCP configure data.
435
436 @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
437 @retval EFI_SUCCESS The configure is copied.
438
439 **/
440 EFI_STATUS
441 Dns4CopyConfigure (
442 OUT EFI_DNS4_CONFIG_DATA *Dst,
443 IN EFI_DNS4_CONFIG_DATA *Src
444 )
445 {
446 UINTN Len;
447 UINT32 Index;
448
449 CopyMem (Dst, Src, sizeof (*Dst));
450 Dst->DnsServerList = NULL;
451
452 //
453 // Allocate a memory then copy DnsServerList to it
454 //
455 if (Src->DnsServerList != NULL) {
456 Len = Src->DnsServerListCount * sizeof (EFI_IPv4_ADDRESS);
457 Dst->DnsServerList = AllocatePool (Len);
458 if (Dst->DnsServerList == NULL) {
459 Dns4CleanConfigure (Dst);
460 return EFI_OUT_OF_RESOURCES;
461 }
462
463 for (Index = 0; Index < Src->DnsServerListCount; Index++) {
464 CopyMem (&Dst->DnsServerList[Index], &Src->DnsServerList[Index], sizeof (EFI_IPv4_ADDRESS));
465 }
466 }
467
468 return EFI_SUCCESS;
469 }
470
471 /**
472 Allocate memory for configure parameter such as timeout value for Dst,
473 then copy the configure parameter from Src to Dst.
474
475 @param[out] Dst The destination DHCP configure data.
476 @param[in] Src The source DHCP configure data.
477
478 @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
479 @retval EFI_SUCCESS The configure is copied.
480
481 **/
482 EFI_STATUS
483 Dns6CopyConfigure (
484 OUT EFI_DNS6_CONFIG_DATA *Dst,
485 IN EFI_DNS6_CONFIG_DATA *Src
486 )
487 {
488 UINTN Len;
489 UINT32 Index;
490
491 CopyMem (Dst, Src, sizeof (*Dst));
492 Dst->DnsServerList = NULL;
493
494 //
495 // Allocate a memory then copy DnsServerList to it
496 //
497 if (Src->DnsServerList != NULL) {
498 Len = Src->DnsServerCount * sizeof (EFI_IPv6_ADDRESS);
499 Dst->DnsServerList = AllocatePool (Len);
500 if (Dst->DnsServerList == NULL) {
501 Dns6CleanConfigure (Dst);
502 return EFI_OUT_OF_RESOURCES;
503 }
504
505 for (Index = 0; Index < Src->DnsServerCount; Index++) {
506 CopyMem (&Dst->DnsServerList[Index], &Src->DnsServerList[Index], sizeof (EFI_IPv6_ADDRESS));
507 }
508 }
509
510 return EFI_SUCCESS;
511 }
512
513 /**
514 Callback of Dns packet. Does nothing.
515
516 @param Arg The context.
517
518 **/
519 VOID
520 EFIAPI
521 DnsDummyExtFree (
522 IN VOID *Arg
523 )
524 {
525 }
526
527 /**
528 Poll the UDP to get the IP4 default address, which may be retrieved
529 by DHCP.
530
531 The default time out value is 5 seconds. If IP has retrieved the default address,
532 the UDP is reconfigured.
533
534 @param Instance The DNS instance
535 @param UdpIo The UDP_IO to poll
536 @param UdpCfgData The UDP configure data to reconfigure the UDP_IO
537
538 @retval TRUE The default address is retrieved and UDP is reconfigured.
539 @retval FALSE Some error occured.
540
541 **/
542 BOOLEAN
543 Dns4GetMapping (
544 IN DNS_INSTANCE *Instance,
545 IN UDP_IO *UdpIo,
546 IN EFI_UDP4_CONFIG_DATA *UdpCfgData
547 )
548 {
549 DNS_SERVICE *Service;
550 EFI_IP4_MODE_DATA Ip4Mode;
551 EFI_UDP4_PROTOCOL *Udp;
552 EFI_STATUS Status;
553
554 ASSERT (Instance->Dns4CfgData.UseDefaultSetting);
555
556 Service = Instance->Service;
557 Udp = UdpIo->Protocol.Udp4;
558
559 Status = gBS->SetTimer (
560 Service->TimerToGetMap,
561 TimerRelative,
562 DNS_TIME_TO_GETMAP * TICKS_PER_SECOND
563 );
564 if (EFI_ERROR (Status)) {
565 return FALSE;
566 }
567
568 while (!EFI_ERROR (gBS->CheckEvent (Service->TimerToGetMap))) {
569 Udp->Poll (Udp);
570
571 if (!EFI_ERROR (Udp->GetModeData (Udp, NULL, &Ip4Mode, NULL, NULL)) &&
572 Ip4Mode.IsConfigured) {
573
574 Udp->Configure (Udp, NULL);
575 return (BOOLEAN) (Udp->Configure (Udp, UdpCfgData) == EFI_SUCCESS);
576 }
577 }
578
579 return FALSE;
580 }
581
582 /**
583 Configure the opened Udp6 instance until the corresponding Ip6 instance
584 has been configured.
585
586 @param Instance The DNS instance
587 @param UdpIo The UDP_IO to poll
588 @param UdpCfgData The UDP configure data to reconfigure the UDP_IO
589
590 @retval TRUE Configure the Udp6 instance successfully.
591 @retval FALSE Some error occured.
592
593 **/
594 BOOLEAN
595 Dns6GetMapping (
596 IN DNS_INSTANCE *Instance,
597 IN UDP_IO *UdpIo,
598 IN EFI_UDP6_CONFIG_DATA *UdpCfgData
599 )
600 {
601 DNS_SERVICE *Service;
602 EFI_IP6_MODE_DATA Ip6Mode;
603 EFI_UDP6_PROTOCOL *Udp;
604 EFI_STATUS Status;
605
606 Service = Instance->Service;
607 Udp = UdpIo->Protocol.Udp6;
608
609 Status = gBS->SetTimer (
610 Service->TimerToGetMap,
611 TimerRelative,
612 DNS_TIME_TO_GETMAP * TICKS_PER_SECOND
613 );
614 if (EFI_ERROR (Status)) {
615 return FALSE;
616 }
617
618 while (!EFI_ERROR (gBS->CheckEvent (Service->TimerToGetMap))) {
619 Udp->Poll (Udp);
620
621 if (!EFI_ERROR (Udp->GetModeData (Udp, NULL, &Ip6Mode, NULL, NULL)) &&
622 Ip6Mode.IsConfigured) {
623
624 Udp->Configure (Udp, NULL);
625 return (BOOLEAN) (Udp->Configure (Udp, UdpCfgData) == EFI_SUCCESS);
626 }
627 }
628
629 return FALSE;
630 }
631
632 /**
633 Configure the UDP.
634
635 @param Instance The DNS session
636 @param UdpIo The UDP_IO instance
637
638 @retval EFI_SUCCESS The UDP is successfully configured for the
639 session.
640
641 **/
642 EFI_STATUS
643 Dns4ConfigUdp (
644 IN DNS_INSTANCE *Instance,
645 IN UDP_IO *UdpIo
646 )
647 {
648 EFI_DNS4_CONFIG_DATA *Config;
649 EFI_UDP4_CONFIG_DATA UdpConfig;
650 EFI_STATUS Status;
651
652 Config = &Instance->Dns4CfgData;
653
654 UdpConfig.AcceptBroadcast = FALSE;
655 UdpConfig.AcceptPromiscuous = FALSE;
656 UdpConfig.AcceptAnyPort = FALSE;
657 UdpConfig.AllowDuplicatePort = FALSE;
658 UdpConfig.TypeOfService = 0;
659 UdpConfig.TimeToLive = 128;
660 UdpConfig.DoNotFragment = FALSE;
661 UdpConfig.ReceiveTimeout = 0;
662 UdpConfig.TransmitTimeout = 0;
663 UdpConfig.UseDefaultAddress = Config->UseDefaultSetting;
664 UdpConfig.SubnetMask = Config->SubnetMask;
665 UdpConfig.StationPort = Config->LocalPort;
666 UdpConfig.RemotePort = DNS_SERVER_PORT;
667
668 CopyMem (&UdpConfig.StationAddress, &Config->StationIp, sizeof (EFI_IPv4_ADDRESS));
669 CopyMem (&UdpConfig.RemoteAddress, &Instance->SessionDnsServer.v4, sizeof (EFI_IPv4_ADDRESS));
670
671 Status = UdpIo->Protocol.Udp4->Configure (UdpIo->Protocol.Udp4, &UdpConfig);
672
673 if ((Status == EFI_NO_MAPPING) && Dns4GetMapping (Instance, UdpIo, &UdpConfig)) {
674 return EFI_SUCCESS;
675 }
676
677 return Status;
678 }
679
680 /**
681 Configure the UDP.
682
683 @param Instance The DNS session
684 @param UdpIo The UDP_IO instance
685
686 @retval EFI_SUCCESS The UDP is successfully configured for the
687 session.
688
689 **/
690 EFI_STATUS
691 Dns6ConfigUdp (
692 IN DNS_INSTANCE *Instance,
693 IN UDP_IO *UdpIo
694 )
695 {
696 EFI_DNS6_CONFIG_DATA *Config;
697 EFI_UDP6_CONFIG_DATA UdpConfig;
698 EFI_STATUS Status;
699
700 Config = &Instance->Dns6CfgData;
701
702 UdpConfig.AcceptPromiscuous = FALSE;
703 UdpConfig.AcceptAnyPort = FALSE;
704 UdpConfig.AllowDuplicatePort = FALSE;
705 UdpConfig.TrafficClass = 0;
706 UdpConfig.HopLimit = 128;
707 UdpConfig.ReceiveTimeout = 0;
708 UdpConfig.TransmitTimeout = 0;
709 UdpConfig.StationPort = Config->LocalPort;
710 UdpConfig.RemotePort = DNS_SERVER_PORT;
711 CopyMem (&UdpConfig.StationAddress, &Config->StationIp, sizeof (EFI_IPv6_ADDRESS));
712 CopyMem (&UdpConfig.RemoteAddress, &Instance->SessionDnsServer.v6, sizeof (EFI_IPv6_ADDRESS));
713
714 Status = UdpIo->Protocol.Udp6->Configure (UdpIo->Protocol.Udp6, &UdpConfig);
715
716 if ((Status == EFI_NO_MAPPING) && Dns6GetMapping (Instance, UdpIo, &UdpConfig)) {
717 return EFI_SUCCESS;
718 }
719
720 return Status;
721 }
722
723 /**
724 Update Dns4 cache to shared list of caches of all DNSv4 instances.
725
726 @param Dns4CacheList All Dns4 cache list.
727 @param DeleteFlag If FALSE, this function is to add one entry to the DNS Cache.
728 If TRUE, this function will delete matching DNS Cache entry.
729 @param Override If TRUE, the matching DNS cache entry will be overwritten with the supplied parameter.
730 If FALSE, EFI_ACCESS_DENIED will be returned if the entry to be added is already exists.
731 @param DnsCacheEntry Entry Pointer to DNS Cache entry.
732
733 @retval EFI_SUCCESS Update Dns4 cache successfully.
734 @retval Others Failed to update Dns4 cache.
735
736 **/
737 EFI_STATUS
738 EFIAPI
739 UpdateDns4Cache (
740 IN LIST_ENTRY *Dns4CacheList,
741 IN BOOLEAN DeleteFlag,
742 IN BOOLEAN Override,
743 IN EFI_DNS4_CACHE_ENTRY DnsCacheEntry
744 )
745 {
746 DNS4_CACHE *NewDnsCache;
747 DNS4_CACHE *Item;
748 LIST_ENTRY *Entry;
749 LIST_ENTRY *Next;
750
751 NewDnsCache = NULL;
752 Item = NULL;
753
754 //
755 // Search the database for the matching EFI_DNS_CACHE_ENTRY
756 //
757 NET_LIST_FOR_EACH_SAFE (Entry, Next, Dns4CacheList) {
758 Item = NET_LIST_USER_STRUCT (Entry, DNS4_CACHE, AllCacheLink);
759 if (StrCmp (DnsCacheEntry.HostName, Item->DnsCache.HostName) == 0 && \
760 CompareMem (DnsCacheEntry.IpAddress, Item->DnsCache.IpAddress, sizeof (EFI_IPv4_ADDRESS)) == 0) {
761 //
762 // This is the Dns cache entry
763 //
764 if (DeleteFlag) {
765 //
766 // Delete matching DNS Cache entry
767 //
768 RemoveEntryList (&Item->AllCacheLink);
769
770 return EFI_SUCCESS;
771 } else if (Override) {
772 //
773 // Update this one
774 //
775 Item->DnsCache.Timeout = DnsCacheEntry.Timeout;
776
777 return EFI_SUCCESS;
778 }else {
779 return EFI_ACCESS_DENIED;
780 }
781 }
782 }
783
784 //
785 // Add new one
786 //
787 NewDnsCache = AllocatePool (sizeof (DNS4_CACHE));
788 if (NewDnsCache == NULL) {
789 return EFI_OUT_OF_RESOURCES;
790 }
791
792 InitializeListHead (&NewDnsCache->AllCacheLink);
793
794 NewDnsCache->DnsCache.HostName = AllocatePool (StrSize (DnsCacheEntry.HostName));
795 if (NewDnsCache->DnsCache.HostName == NULL) {
796 return EFI_OUT_OF_RESOURCES;
797 }
798
799 CopyMem (NewDnsCache->DnsCache.HostName, DnsCacheEntry.HostName, StrSize (DnsCacheEntry.HostName));
800
801 NewDnsCache->DnsCache.IpAddress = AllocatePool (sizeof (EFI_IPv4_ADDRESS));
802 if (NewDnsCache->DnsCache.IpAddress == NULL) {
803 return EFI_OUT_OF_RESOURCES;
804 }
805
806 CopyMem (NewDnsCache->DnsCache.IpAddress, DnsCacheEntry.IpAddress, sizeof (EFI_IPv4_ADDRESS));
807
808 NewDnsCache->DnsCache.Timeout = DnsCacheEntry.Timeout;
809
810 InsertTailList (Dns4CacheList, &NewDnsCache->AllCacheLink);
811
812 return EFI_SUCCESS;
813 }
814
815 /**
816 Update Dns6 cache to shared list of caches of all DNSv6 instances.
817
818 @param Dns6CacheList All Dns6 cache list.
819 @param DeleteFlag If FALSE, this function is to add one entry to the DNS Cache.
820 If TRUE, this function will delete matching DNS Cache entry.
821 @param Override If TRUE, the matching DNS cache entry will be overwritten with the supplied parameter.
822 If FALSE, EFI_ACCESS_DENIED will be returned if the entry to be added is already exists.
823 @param DnsCacheEntry Entry Pointer to DNS Cache entry.
824
825 @retval EFI_SUCCESS Update Dns6 cache successfully.
826 @retval Others Failed to update Dns6 cache.
827 **/
828 EFI_STATUS
829 EFIAPI
830 UpdateDns6Cache (
831 IN LIST_ENTRY *Dns6CacheList,
832 IN BOOLEAN DeleteFlag,
833 IN BOOLEAN Override,
834 IN EFI_DNS6_CACHE_ENTRY DnsCacheEntry
835 )
836 {
837 DNS6_CACHE *NewDnsCache;
838 DNS6_CACHE *Item;
839 LIST_ENTRY *Entry;
840 LIST_ENTRY *Next;
841
842 NewDnsCache = NULL;
843 Item = NULL;
844
845 //
846 // Search the database for the matching EFI_DNS_CACHE_ENTRY
847 //
848 NET_LIST_FOR_EACH_SAFE (Entry, Next, Dns6CacheList) {
849 Item = NET_LIST_USER_STRUCT (Entry, DNS6_CACHE, AllCacheLink);
850 if (StrCmp (DnsCacheEntry.HostName, Item->DnsCache.HostName) == 0 && \
851 CompareMem (DnsCacheEntry.IpAddress, Item->DnsCache.IpAddress, sizeof (EFI_IPv6_ADDRESS)) == 0) {
852 //
853 // This is the Dns cache entry
854 //
855 if (DeleteFlag) {
856 //
857 // Delete matching DNS Cache entry
858 //
859 RemoveEntryList (&Item->AllCacheLink);
860
861 return EFI_SUCCESS;
862 } else if (Override) {
863 //
864 // Update this one
865 //
866 Item->DnsCache.Timeout = DnsCacheEntry.Timeout;
867
868 return EFI_SUCCESS;
869 }else {
870 return EFI_ACCESS_DENIED;
871 }
872 }
873 }
874
875 //
876 // Add new one
877 //
878 NewDnsCache = AllocatePool (sizeof (DNS6_CACHE));
879 if (NewDnsCache == NULL) {
880 return EFI_OUT_OF_RESOURCES;
881 }
882
883 InitializeListHead (&NewDnsCache->AllCacheLink);
884
885 NewDnsCache->DnsCache.HostName = AllocatePool (StrSize (DnsCacheEntry.HostName));
886 if (NewDnsCache->DnsCache.HostName == NULL) {
887 return EFI_OUT_OF_RESOURCES;
888 }
889
890 CopyMem (NewDnsCache->DnsCache.HostName, DnsCacheEntry.HostName, StrSize (DnsCacheEntry.HostName));
891
892 NewDnsCache->DnsCache.IpAddress = AllocatePool (sizeof (EFI_IPv6_ADDRESS));
893 if (NewDnsCache->DnsCache.IpAddress == NULL) {
894 return EFI_OUT_OF_RESOURCES;
895 }
896
897 CopyMem (NewDnsCache->DnsCache.IpAddress, DnsCacheEntry.IpAddress, sizeof (EFI_IPv6_ADDRESS));
898
899 NewDnsCache->DnsCache.Timeout = DnsCacheEntry.Timeout;
900
901 InsertTailList (Dns6CacheList, &NewDnsCache->AllCacheLink);
902
903 return EFI_SUCCESS;
904 }
905
906 /**
907 Add Dns4 ServerIp to common list of addresses of all configured DNSv4 server.
908
909 @param Dns4ServerList Common list of addresses of all configured DNSv4 server.
910 @param ServerIp DNS server Ip.
911
912 @retval EFI_SUCCESS Add Dns4 ServerIp to common list successfully.
913 @retval Others Failed to add Dns4 ServerIp to common list.
914
915 **/
916 EFI_STATUS
917 EFIAPI
918 AddDns4ServerIp (
919 IN LIST_ENTRY *Dns4ServerList,
920 IN EFI_IPv4_ADDRESS ServerIp
921 )
922 {
923 DNS4_SERVER_IP *NewServerIp;
924 DNS4_SERVER_IP *Item;
925 LIST_ENTRY *Entry;
926 LIST_ENTRY *Next;
927
928 NewServerIp = NULL;
929 Item = NULL;
930
931 //
932 // Search the database for the matching ServerIp
933 //
934 NET_LIST_FOR_EACH_SAFE (Entry, Next, Dns4ServerList) {
935 Item = NET_LIST_USER_STRUCT (Entry, DNS4_SERVER_IP, AllServerLink);
936 if (CompareMem (&Item->Dns4ServerIp, &ServerIp, sizeof (EFI_IPv4_ADDRESS)) == 0) {
937 //
938 // Already done.
939 //
940 return EFI_SUCCESS;
941 }
942 }
943
944 //
945 // Add new one
946 //
947 NewServerIp = AllocatePool (sizeof (DNS4_SERVER_IP));
948 if (NewServerIp == NULL) {
949 return EFI_OUT_OF_RESOURCES;
950 }
951
952 InitializeListHead (&NewServerIp->AllServerLink);
953
954 CopyMem (&NewServerIp->Dns4ServerIp, &ServerIp, sizeof (EFI_IPv4_ADDRESS));
955
956 InsertTailList (Dns4ServerList, &NewServerIp->AllServerLink);
957
958 return EFI_SUCCESS;
959 }
960
961 /**
962 Add Dns6 ServerIp to common list of addresses of all configured DNSv6 server.
963
964 @param Dns6ServerList Common list of addresses of all configured DNSv6 server.
965 @param ServerIp DNS server Ip.
966
967 @retval EFI_SUCCESS Add Dns6 ServerIp to common list successfully.
968 @retval Others Failed to add Dns6 ServerIp to common list.
969
970 **/
971 EFI_STATUS
972 EFIAPI
973 AddDns6ServerIp (
974 IN LIST_ENTRY *Dns6ServerList,
975 IN EFI_IPv6_ADDRESS ServerIp
976 )
977 {
978 DNS6_SERVER_IP *NewServerIp;
979 DNS6_SERVER_IP *Item;
980 LIST_ENTRY *Entry;
981 LIST_ENTRY *Next;
982
983 NewServerIp = NULL;
984 Item = NULL;
985
986 //
987 // Search the database for the matching ServerIp
988 //
989 NET_LIST_FOR_EACH_SAFE (Entry, Next, Dns6ServerList) {
990 Item = NET_LIST_USER_STRUCT (Entry, DNS6_SERVER_IP, AllServerLink);
991 if (CompareMem (&Item->Dns6ServerIp, &ServerIp, sizeof (EFI_IPv6_ADDRESS)) == 0) {
992 //
993 // Already done.
994 //
995 return EFI_SUCCESS;
996 }
997 }
998
999 //
1000 // Add new one
1001 //
1002 NewServerIp = AllocatePool (sizeof (DNS6_SERVER_IP));
1003 if (NewServerIp == NULL) {
1004 return EFI_OUT_OF_RESOURCES;
1005 }
1006
1007 InitializeListHead (&NewServerIp->AllServerLink);
1008
1009 CopyMem (&NewServerIp->Dns6ServerIp, &ServerIp, sizeof (EFI_IPv6_ADDRESS));
1010
1011 InsertTailList (Dns6ServerList, &NewServerIp->AllServerLink);
1012
1013 return EFI_SUCCESS;
1014 }
1015
1016 /**
1017 Fill QName for IP querying. QName is a domain name represented as
1018 a sequence of labels, where each label consists of a length octet
1019 followed by that number of octets. The domain name terminates with
1020 the zero length octet for the null label of the root. Caller should
1021 take responsibility to the buffer in QName.
1022
1023 @param HostName Queried HostName
1024
1025 @retval NULL Failed to fill QName.
1026 @return QName filled successfully.
1027
1028 **/
1029 UINT8 *
1030 EFIAPI
1031 DnsFillinQNameForQueryIp (
1032 IN CHAR16 *HostName
1033 )
1034 {
1035 CHAR8 *QueryName;
1036 CHAR8 *Header;
1037 CHAR8 *Tail;
1038 UINTN Len;
1039 UINTN Index;
1040
1041 QueryName = NULL;
1042 Header = NULL;
1043 Tail = NULL;
1044
1045 QueryName = AllocateZeroPool (DNS_DEFAULT_BLKSIZE);
1046 if (QueryName == NULL) {
1047 return NULL;
1048 }
1049
1050 Header = QueryName;
1051 Tail = Header + 1;
1052 Len = 0;
1053 for (Index = 0; HostName[Index] != 0; Index++) {
1054 *Tail = (CHAR8) HostName[Index];
1055 if (*Tail == '.') {
1056 *Header = (CHAR8) Len;
1057 Header = Tail;
1058 Tail ++;
1059 Len = 0;
1060 } else {
1061 Tail++;
1062 Len++;
1063 }
1064 }
1065 *Header = (CHAR8) Len;
1066 *Tail = 0;
1067
1068 return QueryName;
1069 }
1070
1071 /**
1072 Find out whether the response is valid or invalid.
1073
1074 @param TokensMap All DNS transmittal Tokens entry.
1075 @param Identification Identification for queried packet.
1076 @param Type Type for queried packet.
1077 @param Item Return corresponding Token entry.
1078
1079 @retval TRUE The response is valid.
1080 @retval FALSE The response is invalid.
1081
1082 **/
1083 BOOLEAN
1084 IsValidDnsResponse (
1085 IN NET_MAP *TokensMap,
1086 IN UINT16 Identification,
1087 IN UINT16 Type,
1088 OUT NET_MAP_ITEM **Item
1089 )
1090 {
1091 LIST_ENTRY *Entry;
1092
1093 NET_BUF *Packet;
1094 UINT8 *TxString;
1095 DNS_HEADER *DnsHeader;
1096 CHAR8 *QueryName;
1097 DNS_QUERY_SECTION *QuerySection;
1098
1099 NET_LIST_FOR_EACH (Entry, &TokensMap->Used) {
1100 *Item = NET_LIST_USER_STRUCT (Entry, NET_MAP_ITEM, Link);
1101 Packet = (NET_BUF *) ((*Item)->Value);
1102 if (Packet == NULL){
1103
1104 continue;
1105 } else {
1106 TxString = NetbufGetByte (Packet, 0, NULL);
1107 ASSERT (TxString != NULL);
1108 DnsHeader = (DNS_HEADER *) TxString;
1109 QueryName = (CHAR8 *) (TxString + sizeof (*DnsHeader));
1110 QuerySection = (DNS_QUERY_SECTION *) (QueryName + AsciiStrLen (QueryName) + 1);
1111
1112 DnsHeader->Identification = NTOHS (DnsHeader->Identification);
1113 QuerySection->Type = NTOHS (QuerySection->Type);
1114
1115 if (DnsHeader->Identification == Identification && QuerySection->Type == Type) {
1116 return TRUE;
1117 }
1118 }
1119 }
1120
1121 *Item =NULL;
1122
1123 return FALSE;
1124 }
1125
1126 /**
1127 Parse Dns Response.
1128
1129 @param Instance The DNS instance
1130 @param RxString Received buffer.
1131 @param Completed Flag to indicate that Dns response is valid.
1132
1133 @retval EFI_SUCCESS Parse Dns Response successfully.
1134 @retval Others Failed to parse Dns Response.
1135
1136 **/
1137 EFI_STATUS
1138 ParseDnsResponse (
1139 IN OUT DNS_INSTANCE *Instance,
1140 IN UINT8 *RxString,
1141 OUT BOOLEAN *Completed
1142 )
1143 {
1144 DNS_HEADER *DnsHeader;
1145
1146 CHAR8 *QueryName;
1147 DNS_QUERY_SECTION *QuerySection;
1148
1149 CHAR8 *AnswerName;
1150 DNS_ANSWER_SECTION *AnswerSection;
1151 UINT8 *AnswerData;
1152
1153 NET_MAP_ITEM *Item;
1154 DNS4_TOKEN_ENTRY *Dns4TokenEntry;
1155 DNS6_TOKEN_ENTRY *Dns6TokenEntry;
1156
1157 UINT32 IpCount;
1158 UINT32 RRCount;
1159 UINT32 AnswerSectionNum;
1160
1161 EFI_IPv4_ADDRESS *HostAddr4;
1162 EFI_IPv6_ADDRESS *HostAddr6;
1163
1164 EFI_DNS4_CACHE_ENTRY *Dns4CacheEntry;
1165 EFI_DNS6_CACHE_ENTRY *Dns6CacheEntry;
1166
1167 DNS_RESOURCE_RECORD *Dns4RR;
1168 DNS6_RESOURCE_RECORD *Dns6RR;
1169
1170 EFI_STATUS Status;
1171
1172 EFI_TPL OldTpl;
1173
1174 Item = NULL;
1175 Dns4TokenEntry = NULL;
1176 Dns6TokenEntry = NULL;
1177
1178 IpCount = 0;
1179 RRCount = 0;
1180 AnswerSectionNum = 0;
1181
1182 HostAddr4 = NULL;
1183 HostAddr6 = NULL;
1184
1185 Dns4CacheEntry = NULL;
1186 Dns6CacheEntry = NULL;
1187
1188 Dns4RR = NULL;
1189 Dns6RR = NULL;
1190
1191 *Completed = TRUE;
1192 Status = EFI_SUCCESS;
1193
1194 //
1195 // Get header
1196 //
1197 DnsHeader = (DNS_HEADER *) RxString;
1198
1199 DnsHeader->Identification = NTOHS (DnsHeader->Identification);
1200 DnsHeader->Flags.Uint16 = NTOHS (DnsHeader->Flags.Uint16);
1201 DnsHeader->QuestionsNum = NTOHS (DnsHeader->QuestionsNum);
1202 DnsHeader->AnswersNum = NTOHS (DnsHeader->AnswersNum);
1203 DnsHeader->AuthorityNum = NTOHS (DnsHeader->AuthorityNum);
1204 DnsHeader->AditionalNum = NTOHS (DnsHeader->AditionalNum);
1205
1206 //
1207 // Get Query name
1208 //
1209 QueryName = (CHAR8 *) (RxString + sizeof (*DnsHeader));
1210
1211 //
1212 // Get query section
1213 //
1214 QuerySection = (DNS_QUERY_SECTION *) (QueryName + AsciiStrLen (QueryName) + 1);
1215 QuerySection->Type = NTOHS (QuerySection->Type);
1216 QuerySection->Class = NTOHS (QuerySection->Class);
1217
1218 //
1219 // Get Answer name
1220 //
1221 AnswerName = (CHAR8 *) QuerySection + sizeof (*QuerySection);
1222
1223 OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
1224
1225 //
1226 // Check DnsResponse Validity, if so, also get a valid NET_MAP_ITEM.
1227 //
1228 if (Instance->Service->IpVersion == IP_VERSION_4) {
1229 if (!IsValidDnsResponse (&Instance->Dns4TxTokens, DnsHeader->Identification, QuerySection->Type, &Item)) {
1230 *Completed = FALSE;
1231 Status = EFI_ABORTED;
1232 goto ON_EXIT;
1233 }
1234 ASSERT (Item != NULL);
1235 Dns4TokenEntry = (DNS4_TOKEN_ENTRY *) (Item->Key);
1236 } else {
1237 if (!IsValidDnsResponse (&Instance->Dns6TxTokens, DnsHeader->Identification, QuerySection->Type, &Item)) {
1238 *Completed = FALSE;
1239 Status = EFI_ABORTED;
1240 goto ON_EXIT;
1241 }
1242 ASSERT (Item != NULL);
1243 Dns6TokenEntry = (DNS6_TOKEN_ENTRY *) (Item->Key);
1244 }
1245
1246 //
1247 // Continue Check Some Errors.
1248 //
1249 if (DnsHeader->Flags.Bits.RCode != DNS_FLAGS_RCODE_NO_ERROR || DnsHeader->AnswersNum < 1 || \
1250 DnsHeader->Flags.Bits.QR != DNS_FLAGS_QR_RESPONSE || QuerySection->Class != DNS_CLASS_INET) {
1251 Status = EFI_ABORTED;
1252 goto ON_EXIT;
1253 }
1254
1255 //
1256 // Free the sending packet.
1257 //
1258 if (Item->Value != NULL) {
1259 NetbufFree ((NET_BUF *) (Item->Value));
1260 }
1261
1262 //
1263 // Do some buffer allocations.
1264 //
1265 if (Instance->Service->IpVersion == IP_VERSION_4) {
1266 ASSERT (Dns4TokenEntry != NULL);
1267
1268 if (Dns4TokenEntry->GeneralLookUp) {
1269 //
1270 // It's the GeneralLookUp querying.
1271 //
1272 Dns4TokenEntry->Token->RspData.GLookupData = AllocatePool (sizeof (DNS_RESOURCE_RECORD));
1273 if (Dns4TokenEntry->Token->RspData.GLookupData == NULL) {
1274 Status = EFI_OUT_OF_RESOURCES;
1275 goto ON_EXIT;
1276 }
1277 Dns4TokenEntry->Token->RspData.GLookupData->RRList = AllocatePool (DnsHeader->AnswersNum * sizeof (DNS_RESOURCE_RECORD));
1278 if (Dns4TokenEntry->Token->RspData.GLookupData->RRList == NULL) {
1279 Status = EFI_OUT_OF_RESOURCES;
1280 goto ON_EXIT;
1281 }
1282 } else {
1283 //
1284 // It's not the GeneralLookUp querying. Check the Query type.
1285 //
1286 if (QuerySection->Type == DNS_TYPE_A) {
1287 Dns4TokenEntry->Token->RspData.H2AData = AllocatePool (sizeof (DNS_HOST_TO_ADDR_DATA));
1288 if (Dns4TokenEntry->Token->RspData.H2AData == NULL) {
1289 Status = EFI_OUT_OF_RESOURCES;
1290 goto ON_EXIT;
1291 }
1292 Dns4TokenEntry->Token->RspData.H2AData->IpList = AllocatePool (DnsHeader->AnswersNum * sizeof (EFI_IPv4_ADDRESS));
1293 if (Dns4TokenEntry->Token->RspData.H2AData->IpList == NULL) {
1294 Status = EFI_OUT_OF_RESOURCES;
1295 goto ON_EXIT;
1296 }
1297 } else {
1298 Status = EFI_UNSUPPORTED;
1299 goto ON_EXIT;
1300 }
1301 }
1302 } else {
1303 ASSERT (Dns6TokenEntry != NULL);
1304
1305 if (Dns6TokenEntry->GeneralLookUp) {
1306 //
1307 // It's the GeneralLookUp querying.
1308 //
1309 Dns6TokenEntry->Token->RspData.GLookupData = AllocatePool (sizeof (DNS_RESOURCE_RECORD));
1310 if (Dns6TokenEntry->Token->RspData.GLookupData == NULL) {
1311 Status = EFI_UNSUPPORTED;
1312 goto ON_EXIT;
1313 }
1314 Dns6TokenEntry->Token->RspData.GLookupData->RRList = AllocatePool (DnsHeader->AnswersNum * sizeof (DNS_RESOURCE_RECORD));
1315 if (Dns6TokenEntry->Token->RspData.GLookupData->RRList == NULL) {
1316 Status = EFI_UNSUPPORTED;
1317 goto ON_EXIT;
1318 }
1319 } else {
1320 //
1321 // It's not the GeneralLookUp querying. Check the Query type.
1322 //
1323 if (QuerySection->Type == DNS_TYPE_AAAA) {
1324 Dns6TokenEntry->Token->RspData.H2AData = AllocatePool (sizeof (DNS6_HOST_TO_ADDR_DATA));
1325 if (Dns6TokenEntry->Token->RspData.H2AData == NULL) {
1326 Status = EFI_UNSUPPORTED;
1327 goto ON_EXIT;
1328 }
1329 Dns6TokenEntry->Token->RspData.H2AData->IpList = AllocatePool (DnsHeader->AnswersNum * sizeof (EFI_IPv6_ADDRESS));
1330 if (Dns6TokenEntry->Token->RspData.H2AData->IpList == NULL) {
1331 Status = EFI_UNSUPPORTED;
1332 goto ON_EXIT;
1333 }
1334 } else {
1335 Status = EFI_UNSUPPORTED;
1336 goto ON_EXIT;
1337 }
1338 }
1339 }
1340
1341 //
1342 // Processing AnswerSection.
1343 //
1344 while (AnswerSectionNum < DnsHeader->AnswersNum) {
1345 //
1346 // Answer name should be PTR.
1347 //
1348 ASSERT ((*(UINT8 *) AnswerName & 0xC0) == 0xC0);
1349
1350 //
1351 // Get Answer section.
1352 //
1353 AnswerSection = (DNS_ANSWER_SECTION *) (AnswerName + sizeof (UINT16));
1354 AnswerSection->Type = NTOHS (AnswerSection->Type);
1355 AnswerSection->Class = NTOHS (AnswerSection->Class);
1356 AnswerSection->Ttl = NTOHL (AnswerSection->Ttl);
1357 AnswerSection->DataLength = NTOHS (AnswerSection->DataLength);
1358
1359 //
1360 // Check whether it's the GeneralLookUp querying.
1361 //
1362 if (Instance->Service->IpVersion == IP_VERSION_4 && Dns4TokenEntry->GeneralLookUp) {
1363 Dns4RR = Dns4TokenEntry->Token->RspData.GLookupData->RRList;
1364 AnswerData = (UINT8 *) AnswerSection + sizeof (*AnswerSection);
1365
1366 //
1367 // Fill the ResourceRecord.
1368 //
1369 Dns4RR[RRCount].QName = AllocateZeroPool (AsciiStrLen (QueryName) + 1);
1370 if (Dns4RR[RRCount].QName == NULL) {
1371 Status = EFI_UNSUPPORTED;
1372 goto ON_EXIT;
1373 }
1374 CopyMem (Dns4RR[RRCount].QName, QueryName, AsciiStrLen (QueryName));
1375 Dns4RR[RRCount].QType = AnswerSection->Type;
1376 Dns4RR[RRCount].QClass = AnswerSection->Class;
1377 Dns4RR[RRCount].TTL = AnswerSection->Ttl;
1378 Dns4RR[RRCount].DataLength = AnswerSection->DataLength;
1379 Dns4RR[RRCount].RData = AllocateZeroPool (Dns4RR[RRCount].DataLength);
1380 if (Dns4RR[RRCount].RData == NULL) {
1381 Status = EFI_UNSUPPORTED;
1382 goto ON_EXIT;
1383 }
1384 CopyMem (Dns4RR[RRCount].RData, AnswerData, Dns4RR[RRCount].DataLength);
1385
1386 RRCount ++;
1387 } else if (Instance->Service->IpVersion == IP_VERSION_6 && Dns6TokenEntry->GeneralLookUp) {
1388 Dns6RR = Dns6TokenEntry->Token->RspData.GLookupData->RRList;
1389 AnswerData = (UINT8 *) AnswerSection + sizeof (*AnswerSection);
1390
1391 //
1392 // Fill the ResourceRecord.
1393 //
1394 Dns6RR[RRCount].QName = AllocateZeroPool (AsciiStrLen (QueryName) + 1);
1395 if (Dns6RR[RRCount].QName == NULL) {
1396 Status = EFI_UNSUPPORTED;
1397 goto ON_EXIT;
1398 }
1399 CopyMem (Dns6RR[RRCount].QName, QueryName, AsciiStrLen (QueryName));
1400 Dns6RR[RRCount].QType = AnswerSection->Type;
1401 Dns6RR[RRCount].QClass = AnswerSection->Class;
1402 Dns6RR[RRCount].TTL = AnswerSection->Ttl;
1403 Dns6RR[RRCount].DataLength = AnswerSection->DataLength;
1404 Dns6RR[RRCount].RData = AllocateZeroPool (Dns6RR[RRCount].DataLength);
1405 if (Dns6RR[RRCount].RData == NULL) {
1406 Status = EFI_UNSUPPORTED;
1407 goto ON_EXIT;
1408 }
1409 CopyMem (Dns6RR[RRCount].RData, AnswerData, Dns6RR[RRCount].DataLength);
1410
1411 RRCount ++;
1412 } else {
1413 //
1414 // It's not the GeneralLookUp querying.
1415 // Check the Query type, parse the response packet.
1416 //
1417 switch (AnswerSection->Type) {
1418 case DNS_TYPE_A:
1419 //
1420 // This is address entry, get Data.
1421 //
1422 ASSERT (Dns4TokenEntry != NULL && AnswerSection->DataLength == 4);
1423
1424 HostAddr4 = Dns4TokenEntry->Token->RspData.H2AData->IpList;
1425 AnswerData = (UINT8 *) AnswerSection + sizeof (*AnswerSection);
1426 CopyMem (&HostAddr4[IpCount], AnswerData, sizeof (EFI_IPv4_ADDRESS));
1427
1428 //
1429 // Update DNS cache dynamically.
1430 //
1431 if (Dns4CacheEntry != NULL) {
1432 if (Dns4CacheEntry->HostName != NULL) {
1433 FreePool (Dns4CacheEntry->HostName);
1434 }
1435
1436 if (Dns4CacheEntry->IpAddress != NULL) {
1437 FreePool (Dns4CacheEntry->IpAddress);
1438 }
1439
1440 FreePool (Dns4CacheEntry);
1441 }
1442
1443 //
1444 // Allocate new CacheEntry pool.
1445 //
1446 Dns4CacheEntry = AllocateZeroPool (sizeof (EFI_DNS4_CACHE_ENTRY));
1447 if (Dns4CacheEntry == NULL) {
1448 Status = EFI_UNSUPPORTED;
1449 goto ON_EXIT;
1450 }
1451 Dns4CacheEntry->HostName = AllocateZeroPool (2 * (StrLen(Dns4TokenEntry->QueryHostName) + 1));
1452 if (Dns4CacheEntry->HostName == NULL) {
1453 Status = EFI_UNSUPPORTED;
1454 goto ON_EXIT;
1455 }
1456 CopyMem (Dns4CacheEntry->HostName, Dns4TokenEntry->QueryHostName, 2 * (StrLen(Dns4TokenEntry->QueryHostName) + 1));
1457 Dns4CacheEntry->IpAddress = AllocateZeroPool (sizeof (EFI_IPv4_ADDRESS));
1458 if (Dns4CacheEntry->IpAddress == NULL) {
1459 Status = EFI_UNSUPPORTED;
1460 goto ON_EXIT;
1461 }
1462 CopyMem (Dns4CacheEntry->IpAddress, AnswerData, sizeof (EFI_IPv4_ADDRESS));
1463 Dns4CacheEntry->Timeout = AnswerSection->Ttl;
1464
1465 UpdateDns4Cache (&mDriverData->Dns4CacheList, FALSE, TRUE, *Dns4CacheEntry);
1466
1467 IpCount ++;
1468 break;
1469 case DNS_TYPE_AAAA:
1470 //
1471 // This is address entry, get Data.
1472 //
1473 ASSERT (Dns6TokenEntry != NULL && AnswerSection->DataLength == 16);
1474
1475 HostAddr6 = Dns6TokenEntry->Token->RspData.H2AData->IpList;
1476 AnswerData = (UINT8 *) AnswerSection + sizeof (*AnswerSection);
1477 CopyMem (&HostAddr6[IpCount], AnswerData, sizeof (EFI_IPv6_ADDRESS));
1478
1479 //
1480 // Update DNS cache dynamically.
1481 //
1482 if (Dns6CacheEntry != NULL) {
1483 if (Dns6CacheEntry->HostName != NULL) {
1484 FreePool (Dns6CacheEntry->HostName);
1485 }
1486
1487 if (Dns6CacheEntry->IpAddress != NULL) {
1488 FreePool (Dns6CacheEntry->IpAddress);
1489 }
1490
1491 FreePool (Dns6CacheEntry);
1492 }
1493
1494 //
1495 // Allocate new CacheEntry pool.
1496 //
1497 Dns6CacheEntry = AllocateZeroPool (sizeof (EFI_DNS6_CACHE_ENTRY));
1498 if (Dns6CacheEntry == NULL) {
1499 Status = EFI_UNSUPPORTED;
1500 goto ON_EXIT;
1501 }
1502 Dns6CacheEntry->HostName = AllocateZeroPool (2 * (StrLen(Dns6TokenEntry->QueryHostName) + 1));
1503 if (Dns6CacheEntry->HostName == NULL) {
1504 Status = EFI_UNSUPPORTED;
1505 goto ON_EXIT;
1506 }
1507 CopyMem (Dns6CacheEntry->HostName, Dns6TokenEntry->QueryHostName, 2 * (StrLen(Dns6TokenEntry->QueryHostName) + 1));
1508 Dns6CacheEntry->IpAddress = AllocateZeroPool (sizeof (EFI_IPv6_ADDRESS));
1509 if (Dns6CacheEntry->IpAddress == NULL) {
1510 Status = EFI_UNSUPPORTED;
1511 goto ON_EXIT;
1512 }
1513 CopyMem (Dns6CacheEntry->IpAddress, AnswerData, sizeof (EFI_IPv6_ADDRESS));
1514 Dns6CacheEntry->Timeout = AnswerSection->Ttl;
1515
1516 UpdateDns6Cache (&mDriverData->Dns6CacheList, FALSE, TRUE, *Dns6CacheEntry);
1517
1518 IpCount ++;
1519 break;
1520 default:
1521 Status = EFI_UNSUPPORTED;
1522 goto ON_EXIT;
1523 }
1524 }
1525
1526 //
1527 // Find next one
1528 //
1529 AnswerName = (CHAR8 *) AnswerSection + sizeof (*AnswerSection) + AnswerSection->DataLength;
1530 AnswerSectionNum ++;
1531 }
1532
1533 if (Instance->Service->IpVersion == IP_VERSION_4) {
1534 ASSERT (Dns4TokenEntry != NULL);
1535
1536 if (Dns4TokenEntry->GeneralLookUp) {
1537 Dns4TokenEntry->Token->RspData.GLookupData->RRCount = RRCount;
1538 } else {
1539 if (QuerySection->Type == DNS_TYPE_A) {
1540 Dns4TokenEntry->Token->RspData.H2AData->IpCount = IpCount;
1541 } else {
1542 Status = EFI_UNSUPPORTED;
1543 goto ON_EXIT;
1544 }
1545 }
1546 } else {
1547 ASSERT (Dns6TokenEntry != NULL);
1548
1549 if (Dns6TokenEntry->GeneralLookUp) {
1550 Dns6TokenEntry->Token->RspData.GLookupData->RRCount = RRCount;
1551 } else {
1552 if (QuerySection->Type == DNS_TYPE_AAAA) {
1553 Dns6TokenEntry->Token->RspData.H2AData->IpCount = IpCount;
1554 } else {
1555 Status = EFI_UNSUPPORTED;
1556 goto ON_EXIT;
1557 }
1558 }
1559 }
1560
1561 //
1562 // Parsing is complete, SignalEvent here.
1563 //
1564 if (Instance->Service->IpVersion == IP_VERSION_4) {
1565 ASSERT (Dns4TokenEntry != NULL);
1566 Dns4RemoveTokenEntry (&Instance->Dns4TxTokens, Dns4TokenEntry);
1567 Dns4TokenEntry->Token->Status = EFI_SUCCESS;
1568 if (Dns4TokenEntry->Token->Event != NULL) {
1569 gBS->SignalEvent (Dns4TokenEntry->Token->Event);
1570 DispatchDpc ();
1571 }
1572 } else {
1573 ASSERT (Dns6TokenEntry != NULL);
1574 Dns6RemoveTokenEntry (&Instance->Dns6TxTokens, Dns6TokenEntry);
1575 Dns6TokenEntry->Token->Status = EFI_SUCCESS;
1576 if (Dns6TokenEntry->Token->Event != NULL) {
1577 gBS->SignalEvent (Dns6TokenEntry->Token->Event);
1578 DispatchDpc ();
1579 }
1580 }
1581
1582 //
1583 // Free allocated CacheEntry pool.
1584 //
1585 if (Dns4CacheEntry != NULL) {
1586 if (Dns4CacheEntry->HostName != NULL) {
1587 FreePool (Dns4CacheEntry->HostName);
1588 }
1589
1590 if (Dns4CacheEntry->IpAddress != NULL) {
1591 FreePool (Dns4CacheEntry->IpAddress);
1592 }
1593
1594 FreePool (Dns4CacheEntry);
1595 }
1596
1597 if (Dns6CacheEntry != NULL) {
1598 if (Dns6CacheEntry->HostName != NULL) {
1599 FreePool (Dns6CacheEntry->HostName);
1600 }
1601
1602 if (Dns6CacheEntry->IpAddress != NULL) {
1603 FreePool (Dns6CacheEntry->IpAddress);
1604 }
1605
1606 FreePool (Dns6CacheEntry);
1607 }
1608
1609 ON_EXIT:
1610 gBS->RestoreTPL (OldTpl);
1611 return Status;
1612 }
1613
1614 /**
1615 Parse response packet.
1616
1617 @param Packet The packets received.
1618 @param EndPoint The local/remote UDP access point
1619 @param IoStatus The status of the UDP receive
1620 @param Context The opaque parameter to the function.
1621
1622 **/
1623 VOID
1624 EFIAPI
1625 DnsOnPacketReceived (
1626 NET_BUF *Packet,
1627 UDP_END_POINT *EndPoint,
1628 EFI_STATUS IoStatus,
1629 VOID *Context
1630 )
1631 {
1632 DNS_INSTANCE *Instance;
1633
1634 UINT8 *RcvString;
1635
1636 BOOLEAN Completed;
1637
1638 Instance = (DNS_INSTANCE *) Context;
1639 NET_CHECK_SIGNATURE (Instance, DNS_INSTANCE_SIGNATURE);
1640
1641 RcvString = NULL;
1642 Completed = FALSE;
1643
1644 if (EFI_ERROR (IoStatus)) {
1645 goto ON_EXIT;
1646 }
1647
1648 ASSERT (Packet != NULL);
1649
1650 RcvString = NetbufGetByte (Packet, 0, NULL);
1651 ASSERT (RcvString != NULL);
1652
1653 //
1654 // Parse Dns Response
1655 //
1656 ParseDnsResponse (Instance, RcvString, &Completed);
1657
1658 ON_EXIT:
1659
1660 if (Packet != NULL) {
1661 NetbufFree (Packet);
1662 }
1663
1664 if (!Completed) {
1665 UdpIoRecvDatagram (Instance->UdpIo, DnsOnPacketReceived, Instance, 0);
1666 }
1667 }
1668
1669 /**
1670 Release the net buffer when packet is sent.
1671
1672 @param Packet The packets received.
1673 @param EndPoint The local/remote UDP access point
1674 @param IoStatus The status of the UDP receive
1675 @param Context The opaque parameter to the function.
1676
1677 **/
1678 VOID
1679 EFIAPI
1680 DnsOnPacketSent (
1681 NET_BUF *Packet,
1682 UDP_END_POINT *EndPoint,
1683 EFI_STATUS IoStatus,
1684 VOID *Context
1685 )
1686 {
1687 DNS_INSTANCE *Instance;
1688 LIST_ENTRY *Entry;
1689 NET_MAP_ITEM *Item;
1690 DNS4_TOKEN_ENTRY *Dns4TokenEntry;
1691 DNS6_TOKEN_ENTRY *Dns6TokenEntry;
1692
1693 Dns4TokenEntry = NULL;
1694 Dns6TokenEntry = NULL;
1695
1696 Instance = (DNS_INSTANCE *) Context;
1697 NET_CHECK_SIGNATURE (Instance, DNS_INSTANCE_SIGNATURE);
1698
1699 if (Instance->Service->IpVersion == IP_VERSION_4) {
1700 NET_LIST_FOR_EACH (Entry, &Instance->Dns4TxTokens.Used) {
1701 Item = NET_LIST_USER_STRUCT (Entry, NET_MAP_ITEM, Link);
1702 if (Packet == (NET_BUF *)(Item->Value)) {
1703 Dns4TokenEntry = ((DNS4_TOKEN_ENTRY *)Item->Key);
1704 Dns4TokenEntry->PacketToLive = Dns4TokenEntry->Token->RetryInterval;
1705 break;
1706 }
1707 }
1708 } else {
1709 NET_LIST_FOR_EACH (Entry, &Instance->Dns6TxTokens.Used) {
1710 Item = NET_LIST_USER_STRUCT (Entry, NET_MAP_ITEM, Link);
1711 if (Packet == (NET_BUF *)(Item->Value)) {
1712 Dns6TokenEntry = ((DNS6_TOKEN_ENTRY *)Item->Key);
1713 Dns6TokenEntry->PacketToLive = Dns6TokenEntry->Token->RetryInterval;
1714 break;
1715 }
1716 }
1717 }
1718
1719 NetbufFree (Packet);
1720 }
1721
1722 /**
1723 Query request information.
1724
1725 @param Instance The DNS instance
1726 @param Packet The packet for querying request information.
1727
1728 @retval EFI_SUCCESS Query request information successfully.
1729 @retval Others Failed to query request information.
1730
1731 **/
1732 EFI_STATUS
1733 DoDnsQuery (
1734 IN DNS_INSTANCE *Instance,
1735 IN NET_BUF *Packet
1736 )
1737 {
1738 EFI_STATUS Status;
1739
1740 //
1741 // Ready to receive the DNS response.
1742 //
1743 if (Instance->UdpIo->RecvRequest == NULL) {
1744 Status = UdpIoRecvDatagram (Instance->UdpIo, DnsOnPacketReceived, Instance, 0);
1745 if (EFI_ERROR (Status)) {
1746 return Status;
1747 }
1748 }
1749
1750 //
1751 // Transmit the DNS packet.
1752 //
1753 NET_GET_REF (Packet);
1754
1755 Status = UdpIoSendDatagram (Instance->UdpIo, Packet, NULL, NULL, DnsOnPacketSent, Instance);
1756
1757 return Status;
1758 }
1759
1760 /**
1761 Construct the Packet according query section.
1762
1763 @param Instance The DNS instance
1764 @param QueryName Queried Name
1765 @param Type Queried Type
1766 @param Class Queried Class
1767 @param Packet The packet for query
1768
1769 @retval EFI_SUCCESS The packet is constructed.
1770 @retval Others Failed to construct the Packet.
1771
1772 **/
1773 EFI_STATUS
1774 ConstructDNSQuery (
1775 IN DNS_INSTANCE *Instance,
1776 IN CHAR8 *QueryName,
1777 IN UINT16 Type,
1778 IN UINT16 Class,
1779 OUT NET_BUF **Packet
1780 )
1781 {
1782 NET_FRAGMENT Frag;
1783 DNS_HEADER *DnsHeader;
1784 DNS_QUERY_SECTION *DnsQuery;
1785
1786 Frag.Bulk = AllocatePool (DNS_DEFAULT_BLKSIZE * sizeof (UINT8));
1787 if (Frag.Bulk == NULL) {
1788 return EFI_OUT_OF_RESOURCES;
1789 }
1790
1791 //
1792 // Fill header
1793 //
1794 DnsHeader = (DNS_HEADER *) Frag.Bulk;
1795 DnsHeader->Identification = (UINT16)NET_RANDOM (NetRandomInitSeed());
1796 DnsHeader->Flags.Uint16 = 0x0000;
1797 DnsHeader->Flags.Bits.RD = 1;
1798 DnsHeader->Flags.Bits.OpCode = DNS_FLAGS_OPCODE_STANDARD;
1799 DnsHeader->Flags.Bits.QR = DNS_FLAGS_QR_QUERY;
1800 DnsHeader->QuestionsNum = 1;
1801 DnsHeader->AnswersNum = 0;
1802 DnsHeader->AuthorityNum = 0;
1803 DnsHeader->AditionalNum = 0;
1804
1805 DnsHeader->Identification = HTONS (DnsHeader->Identification);
1806 DnsHeader->Flags.Uint16 = HTONS (DnsHeader->Flags.Uint16);
1807 DnsHeader->QuestionsNum = HTONS (DnsHeader->QuestionsNum);
1808 DnsHeader->AnswersNum = HTONS (DnsHeader->AnswersNum);
1809 DnsHeader->AuthorityNum = HTONS (DnsHeader->AuthorityNum);
1810 DnsHeader->AditionalNum = HTONS (DnsHeader->AditionalNum);
1811
1812 Frag.Len = sizeof (*DnsHeader);
1813
1814 //
1815 // Fill Query name
1816 //
1817 CopyMem (Frag.Bulk + Frag.Len, QueryName, AsciiStrLen (QueryName));
1818 Frag.Len = (UINT32) (Frag.Len + AsciiStrLen (QueryName));
1819 *(Frag.Bulk + Frag.Len) = 0;
1820 Frag.Len ++;
1821
1822 //
1823 // Rest query section
1824 //
1825 DnsQuery = (DNS_QUERY_SECTION *) (Frag.Bulk + Frag.Len);
1826
1827 DnsQuery->Type = HTONS (Type);
1828 DnsQuery->Class = HTONS (Class);
1829
1830 Frag.Len += sizeof (*DnsQuery);
1831
1832 //
1833 // Wrap the Frag in a net buffer.
1834 //
1835 *Packet = NetbufFromExt (&Frag, 1, 0, 0, DnsDummyExtFree, NULL);
1836 if (*Packet == NULL) {
1837 FreePool (Frag.Bulk);
1838 return EFI_OUT_OF_RESOURCES;
1839 }
1840
1841 //
1842 // Store the UdpIo in ProtoData.
1843 //
1844 *((UINTN *) &((*Packet)->ProtoData[0])) = (UINTN) (Instance->UdpIo);
1845
1846 return EFI_SUCCESS;
1847 }
1848
1849 /**
1850 Retransmit the packet.
1851
1852 @param Instance The DNS instance
1853 @param Packet Retransmit the packet
1854
1855 @retval EFI_SUCCESS The packet is retransmitted.
1856 @retval Others Failed to retransmit.
1857
1858 **/
1859 EFI_STATUS
1860 DnsRetransmit (
1861 IN DNS_INSTANCE *Instance,
1862 IN NET_BUF *Packet
1863 )
1864 {
1865 EFI_STATUS Status;
1866
1867 UINT8 *Buffer;
1868
1869 ASSERT (Packet != NULL);
1870
1871 //
1872 // Set the requests to the listening port, other packets to the connected port
1873 //
1874 Buffer = NetbufGetByte (Packet, 0, NULL);
1875 ASSERT (Buffer != NULL);
1876
1877 NET_GET_REF (Packet);
1878
1879 Status = UdpIoSendDatagram (
1880 Instance->UdpIo,
1881 Packet,
1882 NULL,
1883 NULL,
1884 DnsOnPacketSent,
1885 Instance
1886 );
1887
1888 if (EFI_ERROR (Status)) {
1889 NET_PUT_REF (Packet);
1890 }
1891
1892 return Status;
1893 }
1894
1895 /**
1896 The timer ticking function for the DNS services.
1897
1898 @param Event The ticking event
1899 @param Context The DNS service instance
1900
1901 **/
1902 VOID
1903 EFIAPI
1904 DnsOnTimerRetransmit (
1905 IN EFI_EVENT Event,
1906 IN VOID *Context
1907 )
1908 {
1909 DNS_SERVICE *Service;
1910
1911 LIST_ENTRY *Entry;
1912 LIST_ENTRY *Next;
1913
1914 DNS_INSTANCE *Instance;
1915 LIST_ENTRY *EntryNetMap;
1916 NET_MAP_ITEM *ItemNetMap;
1917 DNS4_TOKEN_ENTRY *Dns4TokenEntry;
1918 DNS6_TOKEN_ENTRY *Dns6TokenEntry;
1919
1920 Dns4TokenEntry = NULL;
1921 Dns6TokenEntry = NULL;
1922
1923 Service = (DNS_SERVICE *) Context;
1924
1925
1926 if (Service->IpVersion == IP_VERSION_4) {
1927 //
1928 // Iterate through all the children of the DNS service instance. Time
1929 // out the packet. If maximum retries reached, clean the Token up.
1930 //
1931 NET_LIST_FOR_EACH_SAFE (Entry, Next, &Service->Dns4ChildrenList) {
1932 Instance = NET_LIST_USER_STRUCT (Entry, DNS_INSTANCE, Link);
1933
1934 EntryNetMap = Instance->Dns4TxTokens.Used.ForwardLink;
1935 while (EntryNetMap != &Instance->Dns4TxTokens.Used) {
1936 ItemNetMap = NET_LIST_USER_STRUCT (EntryNetMap, NET_MAP_ITEM, Link);
1937 Dns4TokenEntry = (DNS4_TOKEN_ENTRY *)(ItemNetMap->Key);
1938 if (Dns4TokenEntry->PacketToLive == 0 || (--Dns4TokenEntry->PacketToLive > 0)) {
1939 EntryNetMap = EntryNetMap->ForwardLink;
1940 continue;
1941 }
1942
1943 //
1944 // Retransmit the packet if haven't reach the maxmium retry count,
1945 // otherwise exit the transfer.
1946 //
1947 if (++Dns4TokenEntry->Token->RetryCount < Instance->MaxRetry) {
1948 DnsRetransmit (Instance, (NET_BUF *)ItemNetMap->Value);
1949 EntryNetMap = EntryNetMap->ForwardLink;
1950 } else {
1951 //
1952 // Maximum retries reached, clean the Token up.
1953 //
1954 Dns4RemoveTokenEntry (&Instance->Dns4TxTokens, Dns4TokenEntry);
1955 Dns4TokenEntry->Token->Status = EFI_TIMEOUT;
1956 gBS->SignalEvent (Dns4TokenEntry->Token->Event);
1957 DispatchDpc ();
1958
1959 //
1960 // Free the sending packet.
1961 //
1962 if (ItemNetMap->Value != NULL) {
1963 NetbufFree ((NET_BUF *)(ItemNetMap->Value));
1964 }
1965
1966 EntryNetMap = Instance->Dns4TxTokens.Used.ForwardLink;
1967 }
1968 }
1969 }
1970 }else {
1971 //
1972 // Iterate through all the children of the DNS service instance. Time
1973 // out the packet. If maximum retries reached, clean the Token up.
1974 //
1975 NET_LIST_FOR_EACH_SAFE (Entry, Next, &Service->Dns6ChildrenList) {
1976 Instance = NET_LIST_USER_STRUCT (Entry, DNS_INSTANCE, Link);
1977
1978 EntryNetMap = Instance->Dns6TxTokens.Used.ForwardLink;
1979 while (EntryNetMap != &Instance->Dns6TxTokens.Used) {
1980 ItemNetMap = NET_LIST_USER_STRUCT (EntryNetMap, NET_MAP_ITEM, Link);
1981 Dns6TokenEntry = (DNS6_TOKEN_ENTRY *) (ItemNetMap->Key);
1982 if (Dns6TokenEntry->PacketToLive == 0 || (--Dns6TokenEntry->PacketToLive > 0)) {
1983 EntryNetMap = EntryNetMap->ForwardLink;
1984 continue;
1985 }
1986
1987 //
1988 // Retransmit the packet if haven't reach the maxmium retry count,
1989 // otherwise exit the transfer.
1990 //
1991 if (++Dns6TokenEntry->Token->RetryCount < Instance->MaxRetry) {
1992 DnsRetransmit (Instance, (NET_BUF *) ItemNetMap->Value);
1993 EntryNetMap = EntryNetMap->ForwardLink;
1994 } else {
1995 //
1996 // Maximum retries reached, clean the Token up.
1997 //
1998 Dns6RemoveTokenEntry (&Instance->Dns6TxTokens, Dns6TokenEntry);
1999 Dns6TokenEntry->Token->Status = EFI_TIMEOUT;
2000 gBS->SignalEvent (Dns6TokenEntry->Token->Event);
2001 DispatchDpc ();
2002
2003 //
2004 // Free the sending packet.
2005 //
2006 if (ItemNetMap->Value != NULL) {
2007 NetbufFree ((NET_BUF *) (ItemNetMap->Value));
2008 }
2009
2010 EntryNetMap = Instance->Dns6TxTokens.Used.ForwardLink;
2011 }
2012 }
2013 }
2014 }
2015 }
2016
2017 /**
2018 The timer ticking function for the DNS driver.
2019
2020 @param Event The ticking event
2021 @param Context NULL
2022
2023 **/
2024 VOID
2025 EFIAPI
2026 DnsOnTimerUpdate (
2027 IN EFI_EVENT Event,
2028 IN VOID *Context
2029 )
2030 {
2031 LIST_ENTRY *Entry;
2032 LIST_ENTRY *Next;
2033 DNS4_CACHE *Item4;
2034 DNS6_CACHE *Item6;
2035
2036 Item4 = NULL;
2037 Item6 = NULL;
2038
2039 //
2040 // Iterate through all the DNS4 cache list.
2041 //
2042 NET_LIST_FOR_EACH_SAFE (Entry, Next, &mDriverData->Dns4CacheList) {
2043 Item4 = NET_LIST_USER_STRUCT (Entry, DNS4_CACHE, AllCacheLink);
2044 Item4->DnsCache.Timeout--;
2045 }
2046
2047 Entry = mDriverData->Dns4CacheList.ForwardLink;
2048 while (Entry != &mDriverData->Dns4CacheList) {
2049 Item4 = NET_LIST_USER_STRUCT (Entry, DNS4_CACHE, AllCacheLink);
2050 if (Item4->DnsCache.Timeout<=0) {
2051 RemoveEntryList (&Item4->AllCacheLink);
2052 Entry = mDriverData->Dns4CacheList.ForwardLink;
2053 } else {
2054 Entry = Entry->ForwardLink;
2055 }
2056 }
2057
2058 //
2059 // Iterate through all the DNS6 cache list.
2060 //
2061 NET_LIST_FOR_EACH_SAFE (Entry, Next, &mDriverData->Dns6CacheList) {
2062 Item6 = NET_LIST_USER_STRUCT (Entry, DNS6_CACHE, AllCacheLink);
2063 Item6->DnsCache.Timeout--;
2064 }
2065
2066 Entry = mDriverData->Dns6CacheList.ForwardLink;
2067 while (Entry != &mDriverData->Dns6CacheList) {
2068 Item6 = NET_LIST_USER_STRUCT (Entry, DNS6_CACHE, AllCacheLink);
2069 if (Item6->DnsCache.Timeout<=0) {
2070 RemoveEntryList (&Item6->AllCacheLink);
2071 Entry = mDriverData->Dns6CacheList.ForwardLink;
2072 } else {
2073 Entry = Entry->ForwardLink;
2074 }
2075 }
2076 }
2077
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