2 DnsDxe support functions implementation.
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
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.
18 Remove TokenEntry from TokenMap.
20 @param[in] TokenMap All DNSv4 Token entrys.
21 @param[in] TokenEntry TokenEntry need to be removed.
23 @retval EFI_SUCCESS Remove TokenEntry from TokenMap sucessfully.
24 @retval EFI_NOT_FOUND TokenEntry is not found in TokenMap.
28 Dns4RemoveTokenEntry (
30 IN DNS4_TOKEN_ENTRY
*TokenEntry
36 // Find the TokenEntry first.
38 Item
= NetMapFindKey (TokenMap
, (VOID
*) TokenEntry
);
42 // Remove the TokenEntry if it's found in the map.
44 NetMapRemoveItem (TokenMap
, Item
, NULL
);
53 Remove TokenEntry from TokenMap.
55 @param[in] TokenMap All DNSv6 Token entrys.
56 @param[in] TokenEntry TokenEntry need to be removed.
58 @retval EFI_SUCCESS Remove TokenEntry from TokenMap sucessfully.
59 @retval EFI_NOT_FOUND TokenEntry is not found in TokenMap.
63 Dns6RemoveTokenEntry (
65 IN DNS6_TOKEN_ENTRY
*TokenEntry
71 // Find the TokenEntry first.
73 Item
= NetMapFindKey (TokenMap
, (VOID
*) TokenEntry
);
77 // Remove the TokenEntry if it's found in the map.
79 NetMapRemoveItem (TokenMap
, Item
, NULL
);
88 This function cancle the token specified by Arg in the Map.
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.
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
99 @retval EFI_ABORTED Arg is not NULL, and the token specified by Arg is
107 IN NET_MAP_ITEM
*Item
,
108 IN VOID
*Arg OPTIONAL
111 DNS4_TOKEN_ENTRY
*TokenEntry
;
115 if ((Arg
!= NULL
) && (Item
->Key
!= Arg
)) {
119 if (Item
->Value
!= NULL
) {
121 // If the TokenEntry is a transmit TokenEntry, the corresponding Packet is recorded in
124 Packet
= (NET_BUF
*) (Item
->Value
);
125 UdpIo
= (UDP_IO
*) (*((UINTN
*) &Packet
->ProtoData
[0]));
127 UdpIoCancelSentDatagram (UdpIo
, Packet
);
131 // Remove TokenEntry from Dns4TxTokens.
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
);
148 This function cancle the token specified by Arg in the Map.
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.
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
159 @retval EFI_ABORTED Arg is not NULL, and the token specified by Arg is
167 IN NET_MAP_ITEM
*Item
,
168 IN VOID
*Arg OPTIONAL
171 DNS6_TOKEN_ENTRY
*TokenEntry
;
175 if ((Arg
!= NULL
) && (Item
->Key
!= Arg
)) {
179 if (Item
->Value
!= NULL
) {
181 // If the TokenEntry is a transmit TokenEntry, the corresponding Packet is recorded in
184 Packet
= (NET_BUF
*) (Item
->Value
);
185 UdpIo
= (UDP_IO
*) (*((UINTN
*) &Packet
->ProtoData
[0]));
187 UdpIoCancelSentDatagram (UdpIo
, Packet
);
191 // Remove TokenEntry from Dns6TxTokens.
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
);
208 Get the TokenEntry from the TokensMap.
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.
214 @retval EFI_SUCCESS Get the TokenEntry from the TokensMap sucessfully.
215 @retval EFI_NOT_FOUND TokenEntry is not found in TokenMap.
221 IN NET_MAP
*TokensMap
,
222 IN EFI_DNS4_COMPLETION_TOKEN
*Token
,
223 OUT DNS4_TOKEN_ENTRY
**TokenEntry
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
) {
240 return EFI_NOT_FOUND
;
244 Get the TokenEntry from the TokensMap.
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.
250 @retval EFI_SUCCESS Get the TokenEntry from the TokensMap sucessfully.
251 @retval EFI_NOT_FOUND TokenEntry is not found in TokenMap.
257 IN NET_MAP
*TokensMap
,
258 IN EFI_DNS6_COMPLETION_TOKEN
*Token
,
259 OUT DNS6_TOKEN_ENTRY
**TokenEntry
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
) {
276 return EFI_NOT_FOUND
;
280 Cancel DNS4 tokens from the DNS4 instance.
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.
287 @retval EFI_SUCCESS The Token is cancelled.
288 @retval EFI_NOT_FOUND The Token is not found.
292 Dns4InstanceCancelToken (
293 IN DNS_INSTANCE
*Instance
,
294 IN EFI_DNS4_COMPLETION_TOKEN
*Token
298 DNS4_TOKEN_ENTRY
*TokenEntry
;
303 Status
= GetDns4TokenEntry (&Instance
->Dns4TxTokens
, Token
, &TokenEntry
);
304 if (EFI_ERROR (Status
)) {
312 // Cancel this TokenEntry from the Dns4TxTokens map.
314 Status
= NetMapIterate (&Instance
->Dns4TxTokens
, Dns4CancelTokens
, TokenEntry
);
316 if ((TokenEntry
!= NULL
) && (Status
== EFI_ABORTED
)) {
318 // If Token isn't NULL and Status is EFI_ABORTED, the token is cancelled from
319 // the Dns4TxTokens and returns success.
321 if (NetMapIsEmpty (&Instance
->Dns4TxTokens
)) {
322 Instance
->UdpIo
->Protocol
.Udp4
->Cancel (Instance
->UdpIo
->Protocol
.Udp4
, &Instance
->UdpIo
->RecvRequest
->Token
.Udp4
);
327 ASSERT ((TokenEntry
!= NULL
) || (0 == NetMapGetCount (&Instance
->Dns4TxTokens
)));
329 if (NetMapIsEmpty (&Instance
->Dns4TxTokens
)) {
330 Instance
->UdpIo
->Protocol
.Udp4
->Cancel (Instance
->UdpIo
->Protocol
.Udp4
, &Instance
->UdpIo
->RecvRequest
->Token
.Udp4
);
337 Cancel DNS6 tokens from the DNS6 instance.
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.
344 @retval EFI_SUCCESS The Token is cancelled.
345 @retval EFI_NOT_FOUND The Token is not found.
349 Dns6InstanceCancelToken (
350 IN DNS_INSTANCE
*Instance
,
351 IN EFI_DNS6_COMPLETION_TOKEN
*Token
355 DNS6_TOKEN_ENTRY
*TokenEntry
;
360 Status
= GetDns6TokenEntry (&Instance
->Dns6TxTokens
, Token
, &TokenEntry
);
361 if (EFI_ERROR (Status
)) {
369 // Cancel this TokenEntry from the Dns6TxTokens map.
371 Status
= NetMapIterate (&Instance
->Dns6TxTokens
, Dns6CancelTokens
, TokenEntry
);
373 if ((TokenEntry
!= NULL
) && (Status
== EFI_ABORTED
)) {
375 // If Token isn't NULL and Status is EFI_ABORTED, the token is cancelled from
376 // the Dns6TxTokens and returns success.
378 if (NetMapIsEmpty (&Instance
->Dns6TxTokens
)) {
379 Instance
->UdpIo
->Protocol
.Udp6
->Cancel (Instance
->UdpIo
->Protocol
.Udp6
, &Instance
->UdpIo
->RecvRequest
->Token
.Udp6
);
384 ASSERT ((TokenEntry
!= NULL
) || (0 == NetMapGetCount (&Instance
->Dns6TxTokens
)));
386 if (NetMapIsEmpty (&Instance
->Dns6TxTokens
)) {
387 Instance
->UdpIo
->Protocol
.Udp6
->Cancel (Instance
->UdpIo
->Protocol
.Udp6
, &Instance
->UdpIo
->RecvRequest
->Token
.Udp6
);
394 Free the resource related to the configure parameters.
396 @param Config The DNS configure data
401 IN OUT EFI_DNS4_CONFIG_DATA
*Config
404 if (Config
->DnsServerList
!= NULL
) {
405 FreePool (Config
->DnsServerList
);
408 ZeroMem (Config
, sizeof (EFI_DNS4_CONFIG_DATA
));
412 Free the resource related to the configure parameters.
414 @param Config The DNS configure data
419 IN OUT EFI_DNS6_CONFIG_DATA
*Config
422 if (Config
->DnsServerList
!= NULL
) {
423 FreePool (Config
->DnsServerList
);
426 ZeroMem (Config
, sizeof (EFI_DNS6_CONFIG_DATA
));
430 Allocate memory for configure parameter such as timeout value for Dst,
431 then copy the configure parameter from Src to Dst.
433 @param[out] Dst The destination DHCP configure data.
434 @param[in] Src The source DHCP configure data.
436 @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
437 @retval EFI_SUCCESS The configure is copied.
442 OUT EFI_DNS4_CONFIG_DATA
*Dst
,
443 IN EFI_DNS4_CONFIG_DATA
*Src
449 CopyMem (Dst
, Src
, sizeof (*Dst
));
450 Dst
->DnsServerList
= NULL
;
453 // Allocate a memory then copy DnsServerList to it
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
;
463 for (Index
= 0; Index
< Src
->DnsServerListCount
; Index
++) {
464 CopyMem (&Dst
->DnsServerList
[Index
], &Src
->DnsServerList
[Index
], sizeof (EFI_IPv4_ADDRESS
));
472 Allocate memory for configure parameter such as timeout value for Dst,
473 then copy the configure parameter from Src to Dst.
475 @param[out] Dst The destination DHCP configure data.
476 @param[in] Src The source DHCP configure data.
478 @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
479 @retval EFI_SUCCESS The configure is copied.
484 OUT EFI_DNS6_CONFIG_DATA
*Dst
,
485 IN EFI_DNS6_CONFIG_DATA
*Src
491 CopyMem (Dst
, Src
, sizeof (*Dst
));
492 Dst
->DnsServerList
= NULL
;
495 // Allocate a memory then copy DnsServerList to it
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
;
505 for (Index
= 0; Index
< Src
->DnsServerCount
; Index
++) {
506 CopyMem (&Dst
->DnsServerList
[Index
], &Src
->DnsServerList
[Index
], sizeof (EFI_IPv6_ADDRESS
));
514 Callback of Dns packet. Does nothing.
516 @param Arg The context.
528 Poll the UDP to get the IP4 default address, which may be retrieved
531 The default time out value is 5 seconds. If IP has retrieved the default address,
532 the UDP is reconfigured.
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
538 @retval TRUE The default address is retrieved and UDP is reconfigured.
539 @retval FALSE Some error occured.
544 IN DNS_INSTANCE
*Instance
,
546 IN EFI_UDP4_CONFIG_DATA
*UdpCfgData
549 DNS_SERVICE
*Service
;
550 EFI_IP4_MODE_DATA Ip4Mode
;
551 EFI_UDP4_PROTOCOL
*Udp
;
554 ASSERT (Instance
->Dns4CfgData
.UseDefaultSetting
);
556 Service
= Instance
->Service
;
557 Udp
= UdpIo
->Protocol
.Udp4
;
559 Status
= gBS
->SetTimer (
560 Service
->TimerToGetMap
,
562 DNS_TIME_TO_GETMAP
* TICKS_PER_SECOND
564 if (EFI_ERROR (Status
)) {
568 while (!EFI_ERROR (gBS
->CheckEvent (Service
->TimerToGetMap
))) {
571 if (!EFI_ERROR (Udp
->GetModeData (Udp
, NULL
, &Ip4Mode
, NULL
, NULL
)) &&
572 Ip4Mode
.IsConfigured
) {
574 Udp
->Configure (Udp
, NULL
);
575 return (BOOLEAN
) (Udp
->Configure (Udp
, UdpCfgData
) == EFI_SUCCESS
);
583 Configure the opened Udp6 instance until the corresponding Ip6 instance
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
590 @retval TRUE Configure the Udp6 instance successfully.
591 @retval FALSE Some error occured.
596 IN DNS_INSTANCE
*Instance
,
598 IN EFI_UDP6_CONFIG_DATA
*UdpCfgData
601 DNS_SERVICE
*Service
;
602 EFI_IP6_MODE_DATA Ip6Mode
;
603 EFI_UDP6_PROTOCOL
*Udp
;
606 Service
= Instance
->Service
;
607 Udp
= UdpIo
->Protocol
.Udp6
;
609 Status
= gBS
->SetTimer (
610 Service
->TimerToGetMap
,
612 DNS_TIME_TO_GETMAP
* TICKS_PER_SECOND
614 if (EFI_ERROR (Status
)) {
618 while (!EFI_ERROR (gBS
->CheckEvent (Service
->TimerToGetMap
))) {
621 if (!EFI_ERROR (Udp
->GetModeData (Udp
, NULL
, &Ip6Mode
, NULL
, NULL
)) &&
622 Ip6Mode
.IsConfigured
) {
624 Udp
->Configure (Udp
, NULL
);
625 return (BOOLEAN
) (Udp
->Configure (Udp
, UdpCfgData
) == EFI_SUCCESS
);
635 @param Instance The DNS session
636 @param UdpIo The UDP_IO instance
638 @retval EFI_SUCCESS The UDP is successfully configured for the
644 IN DNS_INSTANCE
*Instance
,
648 EFI_DNS4_CONFIG_DATA
*Config
;
649 EFI_UDP4_CONFIG_DATA UdpConfig
;
652 Config
= &Instance
->Dns4CfgData
;
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
;
668 CopyMem (&UdpConfig
.StationAddress
, &Config
->StationIp
, sizeof (EFI_IPv4_ADDRESS
));
669 CopyMem (&UdpConfig
.RemoteAddress
, &Instance
->SessionDnsServer
.v4
, sizeof (EFI_IPv4_ADDRESS
));
671 Status
= UdpIo
->Protocol
.Udp4
->Configure (UdpIo
->Protocol
.Udp4
, &UdpConfig
);
673 if ((Status
== EFI_NO_MAPPING
) && Dns4GetMapping (Instance
, UdpIo
, &UdpConfig
)) {
683 @param Instance The DNS session
684 @param UdpIo The UDP_IO instance
686 @retval EFI_SUCCESS The UDP is successfully configured for the
692 IN DNS_INSTANCE
*Instance
,
696 EFI_DNS6_CONFIG_DATA
*Config
;
697 EFI_UDP6_CONFIG_DATA UdpConfig
;
700 Config
= &Instance
->Dns6CfgData
;
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
));
714 Status
= UdpIo
->Protocol
.Udp6
->Configure (UdpIo
->Protocol
.Udp6
, &UdpConfig
);
716 if ((Status
== EFI_NO_MAPPING
) && Dns6GetMapping (Instance
, UdpIo
, &UdpConfig
)) {
724 Update Dns4 cache to shared list of caches of all DNSv4 instances.
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.
733 @retval EFI_SUCCESS Update Dns4 cache successfully.
734 @retval Others Failed to update Dns4 cache.
740 IN LIST_ENTRY
*Dns4CacheList
,
741 IN BOOLEAN DeleteFlag
,
743 IN EFI_DNS4_CACHE_ENTRY DnsCacheEntry
746 DNS4_CACHE
*NewDnsCache
;
755 // Search the database for the matching EFI_DNS_CACHE_ENTRY
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) {
762 // This is the Dns cache entry
766 // Delete matching DNS Cache entry
768 RemoveEntryList (&Item
->AllCacheLink
);
771 } else if (Override
) {
775 Item
->DnsCache
.Timeout
= DnsCacheEntry
.Timeout
;
779 return EFI_ACCESS_DENIED
;
787 NewDnsCache
= AllocatePool (sizeof (DNS4_CACHE
));
788 if (NewDnsCache
== NULL
) {
789 return EFI_OUT_OF_RESOURCES
;
792 InitializeListHead (&NewDnsCache
->AllCacheLink
);
794 NewDnsCache
->DnsCache
.HostName
= AllocatePool (StrSize (DnsCacheEntry
.HostName
));
795 if (NewDnsCache
->DnsCache
.HostName
== NULL
) {
796 return EFI_OUT_OF_RESOURCES
;
799 CopyMem (NewDnsCache
->DnsCache
.HostName
, DnsCacheEntry
.HostName
, StrSize (DnsCacheEntry
.HostName
));
801 NewDnsCache
->DnsCache
.IpAddress
= AllocatePool (sizeof (EFI_IPv4_ADDRESS
));
802 if (NewDnsCache
->DnsCache
.IpAddress
== NULL
) {
803 return EFI_OUT_OF_RESOURCES
;
806 CopyMem (NewDnsCache
->DnsCache
.IpAddress
, DnsCacheEntry
.IpAddress
, sizeof (EFI_IPv4_ADDRESS
));
808 NewDnsCache
->DnsCache
.Timeout
= DnsCacheEntry
.Timeout
;
810 InsertTailList (Dns4CacheList
, &NewDnsCache
->AllCacheLink
);
816 Update Dns6 cache to shared list of caches of all DNSv6 instances.
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.
825 @retval EFI_SUCCESS Update Dns6 cache successfully.
826 @retval Others Failed to update Dns6 cache.
831 IN LIST_ENTRY
*Dns6CacheList
,
832 IN BOOLEAN DeleteFlag
,
834 IN EFI_DNS6_CACHE_ENTRY DnsCacheEntry
837 DNS6_CACHE
*NewDnsCache
;
846 // Search the database for the matching EFI_DNS_CACHE_ENTRY
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) {
853 // This is the Dns cache entry
857 // Delete matching DNS Cache entry
859 RemoveEntryList (&Item
->AllCacheLink
);
862 } else if (Override
) {
866 Item
->DnsCache
.Timeout
= DnsCacheEntry
.Timeout
;
870 return EFI_ACCESS_DENIED
;
878 NewDnsCache
= AllocatePool (sizeof (DNS6_CACHE
));
879 if (NewDnsCache
== NULL
) {
880 return EFI_OUT_OF_RESOURCES
;
883 InitializeListHead (&NewDnsCache
->AllCacheLink
);
885 NewDnsCache
->DnsCache
.HostName
= AllocatePool (StrSize (DnsCacheEntry
.HostName
));
886 if (NewDnsCache
->DnsCache
.HostName
== NULL
) {
887 return EFI_OUT_OF_RESOURCES
;
890 CopyMem (NewDnsCache
->DnsCache
.HostName
, DnsCacheEntry
.HostName
, StrSize (DnsCacheEntry
.HostName
));
892 NewDnsCache
->DnsCache
.IpAddress
= AllocatePool (sizeof (EFI_IPv6_ADDRESS
));
893 if (NewDnsCache
->DnsCache
.IpAddress
== NULL
) {
894 return EFI_OUT_OF_RESOURCES
;
897 CopyMem (NewDnsCache
->DnsCache
.IpAddress
, DnsCacheEntry
.IpAddress
, sizeof (EFI_IPv6_ADDRESS
));
899 NewDnsCache
->DnsCache
.Timeout
= DnsCacheEntry
.Timeout
;
901 InsertTailList (Dns6CacheList
, &NewDnsCache
->AllCacheLink
);
907 Add Dns4 ServerIp to common list of addresses of all configured DNSv4 server.
909 @param Dns4ServerList Common list of addresses of all configured DNSv4 server.
910 @param ServerIp DNS server Ip.
912 @retval EFI_SUCCESS Add Dns4 ServerIp to common list successfully.
913 @retval Others Failed to add Dns4 ServerIp to common list.
919 IN LIST_ENTRY
*Dns4ServerList
,
920 IN EFI_IPv4_ADDRESS ServerIp
923 DNS4_SERVER_IP
*NewServerIp
;
924 DNS4_SERVER_IP
*Item
;
932 // Search the database for the matching ServerIp
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) {
947 NewServerIp
= AllocatePool (sizeof (DNS4_SERVER_IP
));
948 if (NewServerIp
== NULL
) {
949 return EFI_OUT_OF_RESOURCES
;
952 InitializeListHead (&NewServerIp
->AllServerLink
);
954 CopyMem (&NewServerIp
->Dns4ServerIp
, &ServerIp
, sizeof (EFI_IPv4_ADDRESS
));
956 InsertTailList (Dns4ServerList
, &NewServerIp
->AllServerLink
);
962 Add Dns6 ServerIp to common list of addresses of all configured DNSv6 server.
964 @param Dns6ServerList Common list of addresses of all configured DNSv6 server.
965 @param ServerIp DNS server Ip.
967 @retval EFI_SUCCESS Add Dns6 ServerIp to common list successfully.
968 @retval Others Failed to add Dns6 ServerIp to common list.
974 IN LIST_ENTRY
*Dns6ServerList
,
975 IN EFI_IPv6_ADDRESS ServerIp
978 DNS6_SERVER_IP
*NewServerIp
;
979 DNS6_SERVER_IP
*Item
;
987 // Search the database for the matching ServerIp
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) {
1002 NewServerIp
= AllocatePool (sizeof (DNS6_SERVER_IP
));
1003 if (NewServerIp
== NULL
) {
1004 return EFI_OUT_OF_RESOURCES
;
1007 InitializeListHead (&NewServerIp
->AllServerLink
);
1009 CopyMem (&NewServerIp
->Dns6ServerIp
, &ServerIp
, sizeof (EFI_IPv6_ADDRESS
));
1011 InsertTailList (Dns6ServerList
, &NewServerIp
->AllServerLink
);
1017 Find out whether the response is valid or invalid.
1019 @param TokensMap All DNS transmittal Tokens entry.
1020 @param Identification Identification for queried packet.
1021 @param Type Type for queried packet.
1022 @param Item Return corresponding Token entry.
1024 @retval TRUE The response is valid.
1025 @retval FALSE The response is invalid.
1029 IsValidDnsResponse (
1030 IN NET_MAP
*TokensMap
,
1031 IN UINT16 Identification
,
1033 OUT NET_MAP_ITEM
**Item
1040 DNS_HEADER
*DnsHeader
;
1042 DNS_QUERY_SECTION
*QuerySection
;
1044 NET_LIST_FOR_EACH (Entry
, &TokensMap
->Used
) {
1045 *Item
= NET_LIST_USER_STRUCT (Entry
, NET_MAP_ITEM
, Link
);
1046 Packet
= (NET_BUF
*) ((*Item
)->Value
);
1047 if (Packet
== NULL
){
1051 TxString
= NetbufGetByte (Packet
, 0, NULL
);
1052 ASSERT (TxString
!= NULL
);
1053 DnsHeader
= (DNS_HEADER
*) TxString
;
1054 QueryName
= (CHAR8
*) (TxString
+ sizeof (*DnsHeader
));
1055 QuerySection
= (DNS_QUERY_SECTION
*) (QueryName
+ AsciiStrLen (QueryName
) + 1);
1057 DnsHeader
->Identification
= NTOHS (DnsHeader
->Identification
);
1058 QuerySection
->Type
= NTOHS (QuerySection
->Type
);
1060 if (DnsHeader
->Identification
== Identification
&& QuerySection
->Type
== Type
) {
1074 @param Instance The DNS instance
1075 @param RxString Received buffer.
1076 @param Completed Flag to indicate that Dns response is valid.
1078 @retval EFI_SUCCESS Parse Dns Response successfully.
1079 @retval Others Failed to parse Dns Response.
1084 IN OUT DNS_INSTANCE
*Instance
,
1086 OUT BOOLEAN
*Completed
1089 DNS_HEADER
*DnsHeader
;
1092 DNS_QUERY_SECTION
*QuerySection
;
1095 DNS_ANSWER_SECTION
*AnswerSection
;
1099 DNS4_TOKEN_ENTRY
*Dns4TokenEntry
;
1100 DNS6_TOKEN_ENTRY
*Dns6TokenEntry
;
1103 UINT32 AnswerSectionNum
;
1105 EFI_IPv4_ADDRESS
*HostAddr4
;
1106 EFI_IPv6_ADDRESS
*HostAddr6
;
1108 EFI_DNS4_CACHE_ENTRY
*Dns4CacheEntry
;
1109 EFI_DNS6_CACHE_ENTRY
*Dns6CacheEntry
;
1116 Dns4TokenEntry
= NULL
;
1117 Dns6TokenEntry
= NULL
;
1120 AnswerSectionNum
= 0;
1125 Dns4CacheEntry
= NULL
;
1126 Dns6CacheEntry
= NULL
;
1129 Status
= EFI_SUCCESS
;
1134 DnsHeader
= (DNS_HEADER
*) RxString
;
1136 DnsHeader
->Identification
= NTOHS (DnsHeader
->Identification
);
1137 DnsHeader
->Flags
.Uint16
= NTOHS (DnsHeader
->Flags
.Uint16
);
1138 DnsHeader
->QuestionsNum
= NTOHS (DnsHeader
->QuestionsNum
);
1139 DnsHeader
->AnswersNum
= NTOHS (DnsHeader
->AnswersNum
);
1140 DnsHeader
->AuthorityNum
= NTOHS (DnsHeader
->AuthorityNum
);
1141 DnsHeader
->AditionalNum
= NTOHS (DnsHeader
->AditionalNum
);
1146 QueryName
= (CHAR8
*) (RxString
+ sizeof (*DnsHeader
));
1149 // Get query section
1151 QuerySection
= (DNS_QUERY_SECTION
*) (QueryName
+ AsciiStrLen (QueryName
) + 1);
1152 QuerySection
->Type
= NTOHS (QuerySection
->Type
);
1153 QuerySection
->Class
= NTOHS (QuerySection
->Class
);
1158 AnswerName
= (CHAR8
*) QuerySection
+ sizeof (*QuerySection
);
1160 OldTpl
= gBS
->RaiseTPL (TPL_CALLBACK
);
1163 // Check DnsResponse Validity, if so, also get a valid NET_MAP_ITEM.
1165 if (Instance
->Service
->IpVersion
== IP_VERSION_4
) {
1166 if (!IsValidDnsResponse (&Instance
->Dns4TxTokens
, DnsHeader
->Identification
, QuerySection
->Type
, &Item
)) {
1168 Status
= EFI_ABORTED
;
1171 ASSERT (Item
!= NULL
);
1172 Dns4TokenEntry
= (DNS4_TOKEN_ENTRY
*) (Item
->Key
);
1174 if (!IsValidDnsResponse (&Instance
->Dns6TxTokens
, DnsHeader
->Identification
, QuerySection
->Type
, &Item
)) {
1176 Status
= EFI_ABORTED
;
1179 ASSERT (Item
!= NULL
);
1180 Dns6TokenEntry
= (DNS6_TOKEN_ENTRY
*) (Item
->Key
);
1184 // Continue Check Some Errors.
1186 if (DnsHeader
->Flags
.Bits
.RCode
!= DNS_FLAGS_RCODE_NO_ERROR
|| DnsHeader
->AnswersNum
< 1 || \
1187 DnsHeader
->Flags
.Bits
.QR
!= DNS_FLAGS_QR_RESPONSE
|| QuerySection
->Class
!= DNS_CLASS_INET
) {
1188 Status
= EFI_ABORTED
;
1193 // Free the sending packet.
1195 if (Item
->Value
!= NULL
) {
1196 NetbufFree ((NET_BUF
*) (Item
->Value
));
1200 // Check the Query type, do some buffer allocations.
1202 if (QuerySection
->Type
== DNS_TYPE_A
) {
1203 Dns4TokenEntry
->Token
->RspData
.H2AData
= AllocatePool (sizeof (DNS_HOST_TO_ADDR_DATA
));
1204 ASSERT (Dns4TokenEntry
->Token
->RspData
.H2AData
!= NULL
);
1205 Dns4TokenEntry
->Token
->RspData
.H2AData
->IpList
= AllocatePool (DnsHeader
->AnswersNum
* sizeof (EFI_IPv4_ADDRESS
));
1206 ASSERT (Dns4TokenEntry
->Token
->RspData
.H2AData
->IpList
!= NULL
);
1207 } else if (QuerySection
->Type
== DNS_TYPE_AAAA
) {
1208 Dns6TokenEntry
->Token
->RspData
.H2AData
= AllocatePool (sizeof (DNS6_HOST_TO_ADDR_DATA
));
1209 ASSERT (Dns6TokenEntry
->Token
->RspData
.H2AData
!= NULL
);
1210 Dns6TokenEntry
->Token
->RspData
.H2AData
->IpList
= AllocatePool (DnsHeader
->AnswersNum
* sizeof (EFI_IPv6_ADDRESS
));
1211 ASSERT (Dns6TokenEntry
->Token
->RspData
.H2AData
->IpList
!= NULL
);
1213 Status
= EFI_UNSUPPORTED
;
1218 // Processing AnswerSection.
1220 while (AnswerSectionNum
< DnsHeader
->AnswersNum
) {
1222 // Answer name should be PTR.
1224 ASSERT ((*(UINT8
*) AnswerName
& 0xC0) == 0xC0);
1227 // Get Answer section.
1229 AnswerSection
= (DNS_ANSWER_SECTION
*) (AnswerName
+ sizeof (UINT16
));
1230 AnswerSection
->Type
= NTOHS (AnswerSection
->Type
);
1231 AnswerSection
->Class
= NTOHS (AnswerSection
->Class
);
1232 AnswerSection
->Ttl
= NTOHL (AnswerSection
->Ttl
);
1233 AnswerSection
->DataLength
= NTOHS (AnswerSection
->DataLength
);
1235 ASSERT (AnswerSection
->Class
== DNS_CLASS_INET
);
1237 if (AnswerSection
->Type
== QuerySection
->Type
) {
1238 switch (AnswerSection
->Type
) {
1241 // This is address entry, get Data.
1243 ASSERT (AnswerSection
->DataLength
== 4);
1245 HostAddr4
= Dns4TokenEntry
->Token
->RspData
.H2AData
->IpList
;
1246 AnswerData
= (UINT8
*) AnswerSection
+ sizeof (*AnswerSection
);
1247 CopyMem (&HostAddr4
[IpCount
], AnswerData
, sizeof (EFI_IPv4_ADDRESS
));
1250 // Update DNS cache dynamically.
1252 if (Dns4CacheEntry
!= NULL
) {
1253 if (Dns4CacheEntry
->HostName
!= NULL
) {
1254 FreePool (Dns4CacheEntry
->HostName
);
1257 if (Dns4CacheEntry
->IpAddress
!= NULL
) {
1258 FreePool (Dns4CacheEntry
->IpAddress
);
1261 FreePool (Dns4CacheEntry
);
1265 // Allocate new CacheEntry pool.
1267 Dns4CacheEntry
= AllocateZeroPool (sizeof (EFI_DNS4_CACHE_ENTRY
));
1268 ASSERT (Dns4CacheEntry
!= NULL
);
1269 Dns4CacheEntry
->HostName
= AllocateZeroPool (2 * (StrLen(Dns4TokenEntry
->QueryHostName
) + 1));
1270 ASSERT (Dns4CacheEntry
->HostName
!= NULL
);
1271 CopyMem (Dns4CacheEntry
->HostName
, Dns4TokenEntry
->QueryHostName
, 2 * (StrLen(Dns4TokenEntry
->QueryHostName
) + 1));
1272 Dns4CacheEntry
->IpAddress
= AllocateZeroPool (sizeof (EFI_IPv4_ADDRESS
));
1273 ASSERT (Dns4CacheEntry
->IpAddress
!= NULL
);
1274 CopyMem (Dns4CacheEntry
->IpAddress
, AnswerData
, sizeof (EFI_IPv4_ADDRESS
));
1275 Dns4CacheEntry
->Timeout
= AnswerSection
->Ttl
;
1277 UpdateDns4Cache (&mDriverData
->Dns4CacheList
, FALSE
, TRUE
, *Dns4CacheEntry
);
1283 // This is address entry, get Data.
1285 ASSERT (AnswerSection
->DataLength
== 16);
1287 HostAddr6
= Dns6TokenEntry
->Token
->RspData
.H2AData
->IpList
;
1288 AnswerData
= (UINT8
*) AnswerSection
+ sizeof (*AnswerSection
);
1289 CopyMem (&HostAddr6
[IpCount
], AnswerData
, sizeof (EFI_IPv6_ADDRESS
));
1292 // Update DNS cache dynamically.
1294 if (Dns6CacheEntry
!= NULL
) {
1295 if (Dns6CacheEntry
->HostName
!= NULL
) {
1296 FreePool (Dns6CacheEntry
->HostName
);
1299 if (Dns6CacheEntry
->IpAddress
!= NULL
) {
1300 FreePool (Dns6CacheEntry
->IpAddress
);
1303 FreePool (Dns6CacheEntry
);
1307 // Allocate new CacheEntry pool.
1309 Dns6CacheEntry
= AllocateZeroPool (sizeof (EFI_DNS6_CACHE_ENTRY
));
1310 ASSERT (Dns6CacheEntry
!= NULL
);
1311 Dns6CacheEntry
->HostName
= AllocateZeroPool (2 * (StrLen(Dns6TokenEntry
->QueryHostName
) + 1));
1312 ASSERT (Dns6CacheEntry
->HostName
!= NULL
);
1313 CopyMem (Dns6CacheEntry
->HostName
, Dns6TokenEntry
->QueryHostName
, 2 * (StrLen(Dns6TokenEntry
->QueryHostName
) + 1));
1314 Dns6CacheEntry
->IpAddress
= AllocateZeroPool (sizeof (EFI_IPv6_ADDRESS
));
1315 ASSERT (Dns6CacheEntry
->IpAddress
!= NULL
);
1316 CopyMem (Dns6CacheEntry
->IpAddress
, AnswerData
, sizeof (EFI_IPv6_ADDRESS
));
1317 Dns6CacheEntry
->Timeout
= AnswerSection
->Ttl
;
1319 UpdateDns6Cache (&mDriverData
->Dns6CacheList
, FALSE
, TRUE
, *Dns6CacheEntry
);
1324 Status
= EFI_UNSUPPORTED
;
1332 AnswerName
= (CHAR8
*) AnswerSection
+ sizeof (*AnswerSection
) + AnswerSection
->DataLength
;
1333 AnswerSectionNum
++;
1336 if (QuerySection
->Type
== DNS_TYPE_A
) {
1337 Dns4TokenEntry
->Token
->RspData
.H2AData
->IpCount
= IpCount
;
1338 } else if (QuerySection
->Type
== DNS_TYPE_AAAA
) {
1339 Dns6TokenEntry
->Token
->RspData
.H2AData
->IpCount
= IpCount
;
1343 // Parsing is complete, SignalEvent here.
1345 if (Instance
->Service
->IpVersion
== IP_VERSION_4
) {
1346 Dns4RemoveTokenEntry (&Instance
->Dns4TxTokens
, Dns4TokenEntry
);
1347 Dns4TokenEntry
->Token
->Status
= EFI_SUCCESS
;
1348 if (Dns4TokenEntry
->Token
->Event
!= NULL
) {
1349 gBS
->SignalEvent (Dns4TokenEntry
->Token
->Event
);
1353 Dns6RemoveTokenEntry (&Instance
->Dns6TxTokens
, Dns6TokenEntry
);
1354 Dns6TokenEntry
->Token
->Status
= EFI_SUCCESS
;
1355 if (Dns6TokenEntry
->Token
->Event
!= NULL
) {
1356 gBS
->SignalEvent (Dns6TokenEntry
->Token
->Event
);
1362 // Free allocated CacheEntry pool.
1364 if (Dns4CacheEntry
!= NULL
) {
1365 if (Dns4CacheEntry
->HostName
!= NULL
) {
1366 FreePool (Dns4CacheEntry
->HostName
);
1369 if (Dns4CacheEntry
->IpAddress
!= NULL
) {
1370 FreePool (Dns4CacheEntry
->IpAddress
);
1373 FreePool (Dns4CacheEntry
);
1376 if (Dns6CacheEntry
!= NULL
) {
1377 if (Dns6CacheEntry
->HostName
!= NULL
) {
1378 FreePool (Dns6CacheEntry
->HostName
);
1381 if (Dns6CacheEntry
->IpAddress
!= NULL
) {
1382 FreePool (Dns6CacheEntry
->IpAddress
);
1385 FreePool (Dns6CacheEntry
);
1389 gBS
->RestoreTPL (OldTpl
);
1394 Parse response packet.
1396 @param Packet The packets received.
1397 @param EndPoint The local/remote UDP access point
1398 @param IoStatus The status of the UDP receive
1399 @param Context The opaque parameter to the function.
1404 DnsOnPacketReceived (
1406 UDP_END_POINT
*EndPoint
,
1407 EFI_STATUS IoStatus
,
1411 DNS_INSTANCE
*Instance
;
1417 Instance
= (DNS_INSTANCE
*) Context
;
1418 NET_CHECK_SIGNATURE (Instance
, DNS_INSTANCE_SIGNATURE
);
1423 if (EFI_ERROR (IoStatus
)) {
1427 ASSERT (Packet
!= NULL
);
1429 RcvString
= NetbufGetByte (Packet
, 0, NULL
);
1430 ASSERT (RcvString
!= NULL
);
1433 // Parse Dns Response
1435 ParseDnsResponse (Instance
, RcvString
, &Completed
);
1439 if (Packet
!= NULL
) {
1440 NetbufFree (Packet
);
1444 UdpIoRecvDatagram (Instance
->UdpIo
, DnsOnPacketReceived
, Instance
, 0);
1449 Release the net buffer when packet is sent.
1451 @param Packet The packets received.
1452 @param EndPoint The local/remote UDP access point
1453 @param IoStatus The status of the UDP receive
1454 @param Context The opaque parameter to the function.
1461 UDP_END_POINT
*EndPoint
,
1462 EFI_STATUS IoStatus
,
1466 DNS_INSTANCE
*Instance
;
1469 DNS4_TOKEN_ENTRY
*Dns4TokenEntry
;
1470 DNS6_TOKEN_ENTRY
*Dns6TokenEntry
;
1472 Dns4TokenEntry
= NULL
;
1473 Dns6TokenEntry
= NULL
;
1475 Instance
= (DNS_INSTANCE
*) Context
;
1476 NET_CHECK_SIGNATURE (Instance
, DNS_INSTANCE_SIGNATURE
);
1478 if (Instance
->Service
->IpVersion
== IP_VERSION_4
) {
1479 NET_LIST_FOR_EACH (Entry
, &Instance
->Dns4TxTokens
.Used
) {
1480 Item
= NET_LIST_USER_STRUCT (Entry
, NET_MAP_ITEM
, Link
);
1481 if (Packet
== (NET_BUF
*)(Item
->Value
)) {
1482 Dns4TokenEntry
= ((DNS4_TOKEN_ENTRY
*)Item
->Key
);
1483 Dns4TokenEntry
->PacketToLive
= Dns4TokenEntry
->Token
->RetryInterval
;
1488 NET_LIST_FOR_EACH (Entry
, &Instance
->Dns6TxTokens
.Used
) {
1489 Item
= NET_LIST_USER_STRUCT (Entry
, NET_MAP_ITEM
, Link
);
1490 if (Packet
== (NET_BUF
*)(Item
->Value
)) {
1491 Dns6TokenEntry
= ((DNS6_TOKEN_ENTRY
*)Item
->Key
);
1492 Dns6TokenEntry
->PacketToLive
= Dns6TokenEntry
->Token
->RetryInterval
;
1498 NetbufFree (Packet
);
1502 Query request information.
1504 @param Instance The DNS instance
1505 @param Packet The packet for querying request information.
1507 @retval EFI_SUCCESS Query request information successfully.
1508 @retval Others Failed to query request information.
1513 IN DNS_INSTANCE
*Instance
,
1520 // Ready to receive the DNS response.
1522 if (Instance
->UdpIo
->RecvRequest
== NULL
) {
1523 Status
= UdpIoRecvDatagram (Instance
->UdpIo
, DnsOnPacketReceived
, Instance
, 0);
1524 if (EFI_ERROR (Status
)) {
1530 // Transmit the DNS packet.
1532 NET_GET_REF (Packet
);
1534 Status
= UdpIoSendDatagram (Instance
->UdpIo
, Packet
, NULL
, NULL
, DnsOnPacketSent
, Instance
);
1540 Construct the Packet to query Ip.
1542 @param Instance The DNS instance
1543 @param HostName Queried HostName
1544 @param Type DNS query Type
1545 @param Packet The packet for querying Ip
1547 @retval EFI_SUCCESS The packet is constructed.
1548 @retval Others Failed to construct the Packet.
1552 ConstructDNSQueryIp (
1553 IN DNS_INSTANCE
*Instance
,
1554 IN CHAR16
*HostName
,
1556 OUT NET_BUF
**Packet
1560 DNS_HEADER
*DnsHeader
;
1562 DNS_QUERY_SECTION
*QuerySection
;
1569 Frag
.Bulk
= AllocatePool (DNS_DEFAULT_BLKSIZE
* sizeof (UINT8
));
1570 if (Frag
.Bulk
== NULL
) {
1571 return EFI_OUT_OF_RESOURCES
;
1577 DnsHeader
= (DNS_HEADER
*) Frag
.Bulk
;
1578 DnsHeader
->Identification
= (UINT16
)NET_RANDOM (NetRandomInitSeed());
1579 DnsHeader
->Flags
.Uint16
= 0x0000;
1580 DnsHeader
->Flags
.Bits
.RD
= 1;
1581 DnsHeader
->Flags
.Bits
.OpCode
= DNS_FLAGS_OPCODE_STANDARD
;
1582 DnsHeader
->Flags
.Bits
.QR
= DNS_FLAGS_QR_QUERY
;
1583 DnsHeader
->QuestionsNum
= 1;
1584 DnsHeader
->AnswersNum
= 0;
1585 DnsHeader
->AuthorityNum
= 0;
1586 DnsHeader
->AditionalNum
= 0;
1588 DnsHeader
->Identification
= HTONS (DnsHeader
->Identification
);
1589 DnsHeader
->Flags
.Uint16
= HTONS (DnsHeader
->Flags
.Uint16
);
1590 DnsHeader
->QuestionsNum
= HTONS (DnsHeader
->QuestionsNum
);
1591 DnsHeader
->AnswersNum
= HTONS (DnsHeader
->AnswersNum
);
1592 DnsHeader
->AuthorityNum
= HTONS (DnsHeader
->AuthorityNum
);
1593 DnsHeader
->AditionalNum
= HTONS (DnsHeader
->AditionalNum
);
1595 Frag
.Len
= sizeof (*DnsHeader
);
1600 QueryName
= (CHAR8
*) (Frag
.Bulk
+ Frag
.Len
);
1604 for (Index
= 0; HostName
[Index
] != 0; Index
++) {
1605 *Tail
= (CHAR8
) HostName
[Index
];
1607 *Header
= (CHAR8
) Len
;
1616 *Header
= (CHAR8
) Len
;
1618 Frag
.Len
= (UINT32
) (Frag
.Len
+ StrLen (HostName
) + 2); /// 1 for header, 1 for tail.
1621 // Rest query section
1623 QuerySection
= (DNS_QUERY_SECTION
*) (Frag
.Bulk
+ Frag
.Len
);
1624 QuerySection
->Type
= Type
;
1625 QuerySection
->Class
= DNS_CLASS_INET
;
1627 QuerySection
->Type
= HTONS (QuerySection
->Type
);
1628 QuerySection
->Class
= HTONS (QuerySection
->Class
);
1630 Frag
.Len
+= sizeof (*QuerySection
);
1633 // Wrap the Frag in a net buffer.
1635 *Packet
= NetbufFromExt (&Frag
, 1, 0, 0, DnsDummyExtFree
, NULL
);
1636 if (*Packet
== NULL
) {
1637 FreePool (Frag
.Bulk
);
1638 return EFI_OUT_OF_RESOURCES
;
1642 // Store the UdpIo in ProtoData.
1644 *((UINTN
*) &((*Packet
)->ProtoData
[0])) = (UINTN
) (Instance
->UdpIo
);
1650 Retransmit the packet.
1652 @param Instance The DNS instance
1653 @param Packet Retransmit the packet
1655 @retval EFI_SUCCESS The packet is retransmitted.
1656 @retval Others Failed to retransmit.
1661 IN DNS_INSTANCE
*Instance
,
1669 ASSERT (Packet
!= NULL
);
1672 // Set the requests to the listening port, other packets to the connected port
1674 Buffer
= NetbufGetByte (Packet
, 0, NULL
);
1675 ASSERT (Buffer
!= NULL
);
1677 NET_GET_REF (Packet
);
1679 Status
= UdpIoSendDatagram (
1688 if (EFI_ERROR (Status
)) {
1689 NET_PUT_REF (Packet
);
1696 The timer ticking function for the DNS services.
1698 @param Event The ticking event
1699 @param Context The DNS service instance
1704 DnsOnTimerRetransmit (
1709 DNS_SERVICE
*Service
;
1714 DNS_INSTANCE
*Instance
;
1715 LIST_ENTRY
*EntryNetMap
;
1716 NET_MAP_ITEM
*ItemNetMap
;
1717 DNS4_TOKEN_ENTRY
*Dns4TokenEntry
;
1718 DNS6_TOKEN_ENTRY
*Dns6TokenEntry
;
1720 Dns4TokenEntry
= NULL
;
1721 Dns6TokenEntry
= NULL
;
1723 Service
= (DNS_SERVICE
*) Context
;
1726 if (Service
->IpVersion
== IP_VERSION_4
) {
1728 // Iterate through all the children of the DNS service instance. Time
1729 // out the packet. If maximum retries reached, clean the Token up.
1731 NET_LIST_FOR_EACH_SAFE (Entry
, Next
, &Service
->Dns4ChildrenList
) {
1732 Instance
= NET_LIST_USER_STRUCT (Entry
, DNS_INSTANCE
, Link
);
1734 EntryNetMap
= Instance
->Dns4TxTokens
.Used
.ForwardLink
;
1735 while (EntryNetMap
!= &Instance
->Dns4TxTokens
.Used
) {
1736 ItemNetMap
= NET_LIST_USER_STRUCT (EntryNetMap
, NET_MAP_ITEM
, Link
);
1737 Dns4TokenEntry
= (DNS4_TOKEN_ENTRY
*)(ItemNetMap
->Key
);
1738 if (Dns4TokenEntry
->PacketToLive
== 0 || (--Dns4TokenEntry
->PacketToLive
> 0)) {
1739 EntryNetMap
= EntryNetMap
->ForwardLink
;
1744 // Retransmit the packet if haven't reach the maxmium retry count,
1745 // otherwise exit the transfer.
1747 if (++Dns4TokenEntry
->Token
->RetryCount
< Instance
->MaxRetry
) {
1748 DnsRetransmit (Instance
, (NET_BUF
*)ItemNetMap
->Value
);
1749 EntryNetMap
= EntryNetMap
->ForwardLink
;
1752 // Maximum retries reached, clean the Token up.
1754 Dns4RemoveTokenEntry (&Instance
->Dns4TxTokens
, Dns4TokenEntry
);
1755 Dns4TokenEntry
->Token
->Status
= EFI_TIMEOUT
;
1756 gBS
->SignalEvent (Dns4TokenEntry
->Token
->Event
);
1760 // Free the sending packet.
1762 if (ItemNetMap
->Value
!= NULL
) {
1763 NetbufFree ((NET_BUF
*)(ItemNetMap
->Value
));
1766 EntryNetMap
= Instance
->Dns4TxTokens
.Used
.ForwardLink
;
1772 // Iterate through all the children of the DNS service instance. Time
1773 // out the packet. If maximum retries reached, clean the Token up.
1775 NET_LIST_FOR_EACH_SAFE (Entry
, Next
, &Service
->Dns6ChildrenList
) {
1776 Instance
= NET_LIST_USER_STRUCT (Entry
, DNS_INSTANCE
, Link
);
1778 EntryNetMap
= Instance
->Dns6TxTokens
.Used
.ForwardLink
;
1779 while (EntryNetMap
!= &Instance
->Dns6TxTokens
.Used
) {
1780 ItemNetMap
= NET_LIST_USER_STRUCT (EntryNetMap
, NET_MAP_ITEM
, Link
);
1781 Dns6TokenEntry
= (DNS6_TOKEN_ENTRY
*) (ItemNetMap
->Key
);
1782 if (Dns6TokenEntry
->PacketToLive
== 0 || (--Dns6TokenEntry
->PacketToLive
> 0)) {
1783 EntryNetMap
= EntryNetMap
->ForwardLink
;
1788 // Retransmit the packet if haven't reach the maxmium retry count,
1789 // otherwise exit the transfer.
1791 if (++Dns6TokenEntry
->Token
->RetryCount
< Instance
->MaxRetry
) {
1792 DnsRetransmit (Instance
, (NET_BUF
*) ItemNetMap
->Value
);
1793 EntryNetMap
= EntryNetMap
->ForwardLink
;
1796 // Maximum retries reached, clean the Token up.
1798 Dns6RemoveTokenEntry (&Instance
->Dns6TxTokens
, Dns6TokenEntry
);
1799 Dns6TokenEntry
->Token
->Status
= EFI_TIMEOUT
;
1800 gBS
->SignalEvent (Dns6TokenEntry
->Token
->Event
);
1804 // Free the sending packet.
1806 if (ItemNetMap
->Value
!= NULL
) {
1807 NetbufFree ((NET_BUF
*) (ItemNetMap
->Value
));
1810 EntryNetMap
= Instance
->Dns6TxTokens
.Used
.ForwardLink
;
1818 The timer ticking function for the DNS driver.
1820 @param Event The ticking event
1840 // Iterate through all the DNS4 cache list.
1842 NET_LIST_FOR_EACH_SAFE (Entry
, Next
, &mDriverData
->Dns4CacheList
) {
1843 Item4
= NET_LIST_USER_STRUCT (Entry
, DNS4_CACHE
, AllCacheLink
);
1844 Item4
->DnsCache
.Timeout
--;
1847 Entry
= mDriverData
->Dns4CacheList
.ForwardLink
;
1848 while (Entry
!= &mDriverData
->Dns4CacheList
) {
1849 Item4
= NET_LIST_USER_STRUCT (Entry
, DNS4_CACHE
, AllCacheLink
);
1850 if (Item4
->DnsCache
.Timeout
<=0) {
1851 RemoveEntryList (&Item4
->AllCacheLink
);
1852 Entry
= mDriverData
->Dns4CacheList
.ForwardLink
;
1854 Entry
= Entry
->ForwardLink
;
1859 // Iterate through all the DNS6 cache list.
1861 NET_LIST_FOR_EACH_SAFE (Entry
, Next
, &mDriverData
->Dns6CacheList
) {
1862 Item6
= NET_LIST_USER_STRUCT (Entry
, DNS6_CACHE
, AllCacheLink
);
1863 Item6
->DnsCache
.Timeout
--;
1866 Entry
= mDriverData
->Dns6CacheList
.ForwardLink
;
1867 while (Entry
!= &mDriverData
->Dns6CacheList
) {
1868 Item6
= NET_LIST_USER_STRUCT (Entry
, DNS6_CACHE
, AllCacheLink
);
1869 if (Item6
->DnsCache
.Timeout
<=0) {
1870 RemoveEntryList (&Item6
->AllCacheLink
);
1871 Entry
= mDriverData
->Dns6CacheList
.ForwardLink
;
1873 Entry
= Entry
->ForwardLink
;