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CloverBootloader/NetworkPkg/DnsDxe/DnsProtocol.c

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/** @file
Implementation of EFI_DNS4_PROTOCOL and EFI_DNS6_PROTOCOL interfaces.
Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "DnsImpl.h"
EFI_DNS4_PROTOCOL mDns4Protocol = {
Dns4GetModeData,
Dns4Configure,
Dns4HostNameToIp,
Dns4IpToHostName,
Dns4GeneralLookUp,
Dns4UpdateDnsCache,
Dns4Poll,
Dns4Cancel
};
EFI_DNS6_PROTOCOL mDns6Protocol = {
Dns6GetModeData,
Dns6Configure,
Dns6HostNameToIp,
Dns6IpToHostName,
Dns6GeneralLookUp,
Dns6UpdateDnsCache,
Dns6Poll,
Dns6Cancel
};
/**
Retrieve mode data of this DNS instance.
This function is used to retrieve DNS mode data for this DNS instance.
@param[in] This Pointer to EFI_DNS4_PROTOCOL instance.
@param[out] DnsModeData Point to the mode data.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_NOT_STARTED When DnsConfigData is queried, no configuration data
is available because this instance has not been
configured.
@retval EFI_INVALID_PARAMETER This is NULL or DnsModeData is NULL.
@retval EFI_OUT_OF_RESOURCES Failed to allocate needed resources.
**/
EFI_STATUS
EFIAPI
Dns4GetModeData (
IN EFI_DNS4_PROTOCOL *This,
OUT EFI_DNS4_MODE_DATA *DnsModeData
)
{
DNS_INSTANCE *Instance;
EFI_TPL OldTpl;
UINTN Index;
LIST_ENTRY *Entry;
LIST_ENTRY *Next;
DNS4_SERVER_IP *ServerItem;
EFI_IPv4_ADDRESS *ServerList;
DNS4_CACHE *CacheItem;
EFI_DNS4_CACHE_ENTRY *CacheList;
EFI_STATUS Status;
ServerItem = NULL;
ServerList = NULL;
CacheItem = NULL;
CacheList = NULL;
Status = EFI_SUCCESS;
if ((This == NULL) || (DnsModeData == NULL)) {
return EFI_INVALID_PARAMETER;
}
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
Instance = DNS_INSTANCE_FROM_THIS_PROTOCOL4 (This);
if (Instance->State == DNS_STATE_UNCONFIGED) {
Status = EFI_NOT_STARTED;
goto ON_EXIT;
}
ZeroMem (DnsModeData, sizeof (EFI_DNS4_MODE_DATA));
//
// Get the current configuration data of this instance.
//
Status = Dns4CopyConfigure (&DnsModeData->DnsConfigData, &Instance->Dns4CfgData);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
//
// Get the DnsServerCount and DnsServerList
//
Index = 0;
NET_LIST_FOR_EACH_SAFE (Entry, Next, &mDriverData->Dns4ServerList) {
Index++;
}
DnsModeData->DnsServerCount = (UINT32)Index;
ServerList = AllocatePool (sizeof (EFI_IPv4_ADDRESS) * DnsModeData->DnsServerCount);
if (ServerList == NULL) {
Status = EFI_OUT_OF_RESOURCES;
Dns4CleanConfigure (&DnsModeData->DnsConfigData);
goto ON_EXIT;
}
Index = 0;
NET_LIST_FOR_EACH_SAFE (Entry, Next, &mDriverData->Dns4ServerList) {
ServerItem = NET_LIST_USER_STRUCT (Entry, DNS4_SERVER_IP, AllServerLink);
CopyMem (ServerList + Index, &ServerItem->Dns4ServerIp, sizeof (EFI_IPv4_ADDRESS));
Index++;
}
DnsModeData->DnsServerList = ServerList;
//
// Get the DnsCacheCount and DnsCacheList
//
Index = 0;
NET_LIST_FOR_EACH_SAFE (Entry, Next, &mDriverData->Dns4CacheList) {
Index++;
}
DnsModeData->DnsCacheCount = (UINT32)Index;
CacheList = AllocatePool (sizeof (EFI_DNS4_CACHE_ENTRY) * DnsModeData->DnsCacheCount);
if (CacheList == NULL) {
Status = EFI_OUT_OF_RESOURCES;
Dns4CleanConfigure (&DnsModeData->DnsConfigData);
FreePool (ServerList);
goto ON_EXIT;
}
Index = 0;
NET_LIST_FOR_EACH_SAFE (Entry, Next, &mDriverData->Dns4CacheList) {
CacheItem = NET_LIST_USER_STRUCT (Entry, DNS4_CACHE, AllCacheLink);
CopyMem (CacheList + Index, &CacheItem->DnsCache, sizeof (EFI_DNS4_CACHE_ENTRY));
Index++;
}
DnsModeData->DnsCacheList = CacheList;
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Configure this DNS instance.
This function is used to configure DNS mode data for this DNS instance.
@param[in] This Pointer to EFI_DNS4_PROTOCOL instance.
@param[in] DnsConfigData Point to the Configuration data.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_UNSUPPORTED The designated protocol is not supported.
@retval EFI_INVALID_PARAMETER This is NULL.
The StationIp address provided in DnsConfigData is not a
valid unicast.
DnsServerList is NULL while DnsServerListCount
is not ZERO.
DnsServerListCount is ZERO while DnsServerList
is not NULL
@retval EFI_OUT_OF_RESOURCES The DNS instance data or required space could not be
allocated.
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred. The
EFI DNSv4 Protocol instance is not configured.
@retval EFI_ALREADY_STARTED Second call to Configure() with DnsConfigData. To
reconfigure the instance the caller must call Configure()
with NULL first to return driver to unconfigured state.
**/
EFI_STATUS
EFIAPI
Dns4Configure (
IN EFI_DNS4_PROTOCOL *This,
IN EFI_DNS4_CONFIG_DATA *DnsConfigData
)
{
EFI_STATUS Status;
DNS_INSTANCE *Instance;
EFI_TPL OldTpl;
IP4_ADDR Ip;
IP4_ADDR Netmask;
UINT32 ServerListCount;
EFI_IPv4_ADDRESS *ServerList;
Status = EFI_SUCCESS;
ServerList = NULL;
if ((This == NULL) ||
((DnsConfigData != NULL) && (((DnsConfigData->DnsServerListCount != 0) && (DnsConfigData->DnsServerList == NULL)) ||
((DnsConfigData->DnsServerListCount == 0) && (DnsConfigData->DnsServerList != NULL)))))
{
return EFI_INVALID_PARAMETER;
}
if ((DnsConfigData != NULL) && (DnsConfigData->Protocol != DNS_PROTOCOL_UDP)) {
return EFI_UNSUPPORTED;
}
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
Instance = DNS_INSTANCE_FROM_THIS_PROTOCOL4 (This);
if (DnsConfigData == NULL) {
ZeroMem (&Instance->SessionDnsServer, sizeof (EFI_IP_ADDRESS));
//
// Reset the Instance if ConfigData is NULL
//
if (!NetMapIsEmpty (&Instance->Dns4TxTokens)) {
Dns4InstanceCancelToken (Instance, NULL);
}
if (Instance->UdpIo != NULL) {
UdpIoCleanIo (Instance->UdpIo);
}
if (Instance->Dns4CfgData.DnsServerList != NULL) {
FreePool (Instance->Dns4CfgData.DnsServerList);
}
ZeroMem (&Instance->Dns4CfgData, sizeof (EFI_DNS4_CONFIG_DATA));
Instance->State = DNS_STATE_UNCONFIGED;
} else {
//
// Configure the parameters for new operation.
//
CopyMem (&Ip, &DnsConfigData->StationIp, sizeof (IP4_ADDR));
CopyMem (&Netmask, &DnsConfigData->SubnetMask, sizeof (IP4_ADDR));
Ip = NTOHL (Ip);
Netmask = NTOHL (Netmask);
if (!DnsConfigData->UseDefaultSetting &&
((!IP4_IS_VALID_NETMASK (Netmask) || ((Netmask != 0) && !NetIp4IsUnicast (Ip, Netmask)))))
{
Status = EFI_INVALID_PARAMETER;
goto ON_EXIT;
}
Status = Dns4CopyConfigure (&Instance->Dns4CfgData, DnsConfigData);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
if (DnsConfigData->DnsServerListCount == 0) {
gBS->RestoreTPL (OldTpl);
//
// The DNS instance will retrieve DNS server from DHCP Server
//
Status = GetDns4ServerFromDhcp4 (
Instance,
&ServerListCount,
&ServerList
);
if (EFI_ERROR (Status)) {
return Status;
}
ASSERT (ServerList != NULL);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
CopyMem (&Instance->SessionDnsServer.v4, &ServerList[0], sizeof (EFI_IPv4_ADDRESS));
} else {
CopyMem (&Instance->SessionDnsServer.v4, &DnsConfigData->DnsServerList[0], sizeof (EFI_IPv4_ADDRESS));
}
//
// Config UDP
//
Status = Dns4ConfigUdp (Instance, Instance->UdpIo);
if (EFI_ERROR (Status)) {
if (Instance->Dns4CfgData.DnsServerList != NULL) {
FreePool (Instance->Dns4CfgData.DnsServerList);
Instance->Dns4CfgData.DnsServerList = NULL;
}
goto ON_EXIT;
}
//
// Add configured DNS server used by this instance to ServerList.
//
Status = AddDns4ServerIp (&mDriverData->Dns4ServerList, Instance->SessionDnsServer.v4);
if (EFI_ERROR (Status)) {
if (Instance->Dns4CfgData.DnsServerList != NULL) {
FreePool (Instance->Dns4CfgData.DnsServerList);
Instance->Dns4CfgData.DnsServerList = NULL;
}
goto ON_EXIT;
}
Instance->State = DNS_STATE_CONFIGED;
}
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Host name to host address translation.
The HostNameToIp () function is used to translate the host name to host IP address. A
type A query is used to get the one or more IP addresses for this host.
@param[in] This Pointer to EFI_DNS4_PROTOCOL instance.
@param[in] HostName Host name.
@param[in] Token Point to the completion token to translate host name
to host address.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
This is NULL.
Token is NULL.
Token.Event is NULL.
HostName is NULL. HostName string is unsupported format.
@retval EFI_NO_MAPPING There's no source address is available for use.
@retval EFI_NOT_STARTED This instance has not been started.
**/
EFI_STATUS
EFIAPI
Dns4HostNameToIp (
IN EFI_DNS4_PROTOCOL *This,
IN CHAR16 *HostName,
IN EFI_DNS4_COMPLETION_TOKEN *Token
)
{
EFI_STATUS Status;
DNS_INSTANCE *Instance;
EFI_DNS4_CONFIG_DATA *ConfigData;
UINTN Index;
DNS4_CACHE *Item;
LIST_ENTRY *Entry;
LIST_ENTRY *Next;
CHAR8 *QueryName;
DNS4_TOKEN_ENTRY *TokenEntry;
NET_BUF *Packet;
EFI_TPL OldTpl;
Status = EFI_SUCCESS;
Item = NULL;
QueryName = NULL;
TokenEntry = NULL;
Packet = NULL;
//
// Validate the parameters
//
if ((This == NULL) || (HostName == NULL) || (Token == NULL)) {
return EFI_INVALID_PARAMETER;
}
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
Instance = DNS_INSTANCE_FROM_THIS_PROTOCOL4 (This);
ConfigData = &(Instance->Dns4CfgData);
if (Instance->State != DNS_STATE_CONFIGED) {
Status = EFI_NOT_STARTED;
goto ON_EXIT;
}
Token->Status = EFI_NOT_READY;
//
// If zero, use the parameter configured through Dns.Configure() interface.
//
if (Token->RetryCount == 0) {
Token->RetryCount = ConfigData->RetryCount;
}
//
// If zero, use the parameter configured through Dns.Configure() interface.
//
if (Token->RetryInterval == 0) {
Token->RetryInterval = ConfigData->RetryInterval;
}
//
// Minimum interval of retry is 2 second. If the retry interval is less than 2 second, then use the 2 second.
//
if (Token->RetryInterval < DNS_DEFAULT_TIMEOUT) {
Token->RetryInterval = DNS_DEFAULT_TIMEOUT;
}
//
// Check cache
//
if (ConfigData->EnableDnsCache) {
Index = 0;
NET_LIST_FOR_EACH_SAFE (Entry, Next, &mDriverData->Dns4CacheList) {
Item = NET_LIST_USER_STRUCT (Entry, DNS4_CACHE, AllCacheLink);
if (StrCmp (HostName, Item->DnsCache.HostName) == 0) {
Index++;
}
}
if (Index != 0) {
Token->RspData.H2AData = AllocatePool (sizeof (DNS_HOST_TO_ADDR_DATA));
if (Token->RspData.H2AData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
Token->RspData.H2AData->IpCount = (UINT32)Index;
Token->RspData.H2AData->IpList = AllocatePool (sizeof (EFI_IPv4_ADDRESS) * Index);
if (Token->RspData.H2AData->IpList == NULL) {
if (Token->RspData.H2AData != NULL) {
FreePool (Token->RspData.H2AData);
}
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
Index = 0;
NET_LIST_FOR_EACH_SAFE (Entry, Next, &mDriverData->Dns4CacheList) {
Item = NET_LIST_USER_STRUCT (Entry, DNS4_CACHE, AllCacheLink);
if (((UINT32)Index < Token->RspData.H2AData->IpCount) && (StrCmp (HostName, Item->DnsCache.HostName) == 0)) {
CopyMem ((Token->RspData.H2AData->IpList) + Index, Item->DnsCache.IpAddress, sizeof (EFI_IPv4_ADDRESS));
Index++;
}
}
Token->Status = EFI_SUCCESS;
if (Token->Event != NULL) {
gBS->SignalEvent (Token->Event);
DispatchDpc ();
}
Status = Token->Status;
goto ON_EXIT;
}
}
//
// Construct DNS TokenEntry.
//
TokenEntry = AllocateZeroPool (sizeof (DNS4_TOKEN_ENTRY));
if (TokenEntry == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
TokenEntry->PacketToLive = Token->RetryInterval;
TokenEntry->Token = Token;
TokenEntry->QueryHostName = AllocateZeroPool (StrSize (HostName));
if (TokenEntry->QueryHostName == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
CopyMem (TokenEntry->QueryHostName, HostName, StrSize (HostName));
//
// Construct QName.
//
QueryName = NetLibCreateDnsQName (TokenEntry->QueryHostName);
if (QueryName == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
//
// Construct DNS Query Packet.
//
Status = ConstructDNSQuery (Instance, QueryName, DNS_TYPE_A, DNS_CLASS_INET, &Packet);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
ASSERT (Packet != NULL);
//
// Save the token into the Dns4TxTokens map.
//
Status = NetMapInsertTail (&Instance->Dns4TxTokens, TokenEntry, Packet);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
//
// Dns Query Ip
//
Status = DoDnsQuery (Instance, Packet);
if (EFI_ERROR (Status)) {
Dns4RemoveTokenEntry (&Instance->Dns4TxTokens, TokenEntry);
}
ON_EXIT:
if (EFI_ERROR (Status)) {
if (TokenEntry != NULL) {
if (TokenEntry->QueryHostName != NULL) {
FreePool (TokenEntry->QueryHostName);
}
FreePool (TokenEntry);
}
if (Packet != NULL) {
NetbufFree (Packet);
}
}
if (QueryName != NULL) {
FreePool (QueryName);
}
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
IPv4 address to host name translation also known as Reverse DNS lookup.
The IpToHostName() function is used to translate the host address to host name. A type PTR
query is used to get the primary name of the host. Support of this function is optional.
@param[in] This Pointer to EFI_DNS4_PROTOCOL instance.
@param[in] IpAddress Ip Address.
@param[in] Token Point to the completion token to translate host
address to host name.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_UNSUPPORTED This function is not supported.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
This is NULL.
Token is NULL.
Token.Event is NULL.
IpAddress is not valid IP address .
@retval EFI_NO_MAPPING There's no source address is available for use.
@retval EFI_ALREADY_STARTED This Token is being used in another DNS session.
@retval EFI_OUT_OF_RESOURCES Failed to allocate needed resources.
**/
EFI_STATUS
EFIAPI
Dns4IpToHostName (
IN EFI_DNS4_PROTOCOL *This,
IN EFI_IPv4_ADDRESS IpAddress,
IN EFI_DNS4_COMPLETION_TOKEN *Token
)
{
return EFI_UNSUPPORTED;
}
/**
Retrieve arbitrary information from the DNS server.
This GeneralLookup() function retrieves arbitrary information from the DNS. The caller
supplies a QNAME, QTYPE, and QCLASS, and all of the matching RRs are returned. All
RR content (e.g., TTL) was returned. The caller need parse the returned RR to get
required information. The function is optional.
@param[in] This Pointer to EFI_DNS4_PROTOCOL instance.
@param[in] QName Pointer to Query Name.
@param[in] QType Query Type.
@param[in] QClass Query Name.
@param[in] Token Point to the completion token to retrieve arbitrary
information.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_UNSUPPORTED This function is not supported. Or the requested
QType is not supported
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
This is NULL.
Token is NULL.
Token.Event is NULL.
QName is NULL.
@retval EFI_NO_MAPPING There's no source address is available for use.
@retval EFI_ALREADY_STARTED This Token is being used in another DNS session.
@retval EFI_OUT_OF_RESOURCES Failed to allocate needed resources.
**/
EFI_STATUS
EFIAPI
Dns4GeneralLookUp (
IN EFI_DNS4_PROTOCOL *This,
IN CHAR8 *QName,
IN UINT16 QType,
IN UINT16 QClass,
IN EFI_DNS4_COMPLETION_TOKEN *Token
)
{
EFI_STATUS Status;
DNS_INSTANCE *Instance;
EFI_DNS4_CONFIG_DATA *ConfigData;
DNS4_TOKEN_ENTRY *TokenEntry;
NET_BUF *Packet;
EFI_TPL OldTpl;
Status = EFI_SUCCESS;
TokenEntry = NULL;
Packet = NULL;
//
// Validate the parameters
//
if ((This == NULL) || (QName == NULL) || (Token == NULL)) {
return EFI_INVALID_PARAMETER;
}
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
Instance = DNS_INSTANCE_FROM_THIS_PROTOCOL4 (This);
ConfigData = &(Instance->Dns4CfgData);
if (Instance->State != DNS_STATE_CONFIGED) {
Status = EFI_NOT_STARTED;
goto ON_EXIT;
}
Token->Status = EFI_NOT_READY;
//
// If zero, use the parameter configured through Dns.Configure() interface.
//
if (Token->RetryCount == 0) {
Token->RetryCount = ConfigData->RetryCount;
}
//
// If zero, use the parameter configured through Dns.Configure() interface.
//
if (Token->RetryInterval == 0) {
Token->RetryInterval = ConfigData->RetryInterval;
}
//
// Minimum interval of retry is 2 second. If the retry interval is less than 2 second, then use the 2 second.
//
if (Token->RetryInterval < DNS_DEFAULT_TIMEOUT) {
Token->RetryInterval = DNS_DEFAULT_TIMEOUT;
}
//
// Construct DNS TokenEntry.
//
TokenEntry = AllocateZeroPool (sizeof (DNS4_TOKEN_ENTRY));
if (TokenEntry == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
TokenEntry->PacketToLive = Token->RetryInterval;
TokenEntry->GeneralLookUp = TRUE;
TokenEntry->Token = Token;
//
// Construct DNS Query Packet.
//
Status = ConstructDNSQuery (Instance, QName, QType, QClass, &Packet);
if (EFI_ERROR (Status)) {
if (TokenEntry != NULL) {
FreePool (TokenEntry);
}
goto ON_EXIT;
}
ASSERT (Packet != NULL);
//
// Save the token into the Dns4TxTokens map.
//
Status = NetMapInsertTail (&Instance->Dns4TxTokens, TokenEntry, Packet);
if (EFI_ERROR (Status)) {
if (TokenEntry != NULL) {
FreePool (TokenEntry);
}
NetbufFree (Packet);
goto ON_EXIT;
}
//
// Dns Query Ip
//
Status = DoDnsQuery (Instance, Packet);
if (EFI_ERROR (Status)) {
Dns4RemoveTokenEntry (&Instance->Dns4TxTokens, TokenEntry);
if (TokenEntry != NULL) {
FreePool (TokenEntry);
}
NetbufFree (Packet);
}
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
This function is to update the DNS Cache.
The UpdateDnsCache() function is used to add/delete/modify DNS cache entry. DNS cache
can be normally dynamically updated after the DNS resolve succeeds. This function
provided capability to manually add/delete/modify the DNS cache.
@param[in] This Pointer to EFI_DNS4_PROTOCOL instance.
@param[in] DeleteFlag If FALSE, this function is to add one entry to the
DNS Cache. If TRUE, this function will delete
matching DNS Cache entry.
@param[in] Override If TRUE, the matching DNS cache entry will be
overwritten with the supplied parameter. If FALSE,
EFI_ACCESS_DENIED will be returned if the entry to
be added is already existed.
@param[in] DnsCacheEntry Pointer to DNS Cache entry.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
This is NULL.
DnsCacheEntry.HostName is NULL.
DnsCacheEntry.IpAddress is NULL.
DnsCacheEntry.Timeout is zero.
@retval EFI_ACCESS_DENIED The DNS cache entry already exists and Override is
not TRUE.
**/
EFI_STATUS
EFIAPI
Dns4UpdateDnsCache (
IN EFI_DNS4_PROTOCOL *This,
IN BOOLEAN DeleteFlag,
IN BOOLEAN Override,
IN EFI_DNS4_CACHE_ENTRY DnsCacheEntry
)
{
EFI_STATUS Status;
EFI_TPL OldTpl;
Status = EFI_SUCCESS;
if ((DnsCacheEntry.HostName == NULL) || (DnsCacheEntry.IpAddress == NULL) || (DnsCacheEntry.Timeout == 0)) {
return EFI_INVALID_PARAMETER;
}
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
//
// Update Dns4Cache here.
//
Status = UpdateDns4Cache (&mDriverData->Dns4CacheList, DeleteFlag, Override, DnsCacheEntry);
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Polls for incoming data packets and processes outgoing data packets.
The Poll() function can be used by network drivers and applications to increase the
rate that data packets are moved between the communications device and the transmit
and receive queues.
In some systems, the periodic timer event in the managed network driver may not poll
the underlying communications device fast enough to transmit and/or receive all data
packets without missing incoming packets or dropping outgoing packets. Drivers and
applications that are experiencing packet loss should try calling the Poll()
function more often.
@param[in] This Pointer to EFI_DNS4_PROTOCOL instance.
@retval EFI_SUCCESS Incoming or outgoing data was processed.
@retval EFI_NOT_STARTED This EFI DNS Protocol instance has not been started.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
@retval EFI_TIMEOUT Data was dropped out of the transmit and/or receive
queue. Consider increasing the polling rate.
**/
EFI_STATUS
EFIAPI
Dns4Poll (
IN EFI_DNS4_PROTOCOL *This
)
{
DNS_INSTANCE *Instance;
EFI_UDP4_PROTOCOL *Udp;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = DNS_INSTANCE_FROM_THIS_PROTOCOL4 (This);
if (Instance->State == DNS_STATE_UNCONFIGED) {
return EFI_NOT_STARTED;
} else if (Instance->State == DNS_STATE_DESTROY) {
return EFI_DEVICE_ERROR;
}
Udp = Instance->UdpIo->Protocol.Udp4;
return Udp->Poll (Udp);
}
/**
Abort an asynchronous DNS operation, including translation between IP and Host, and
general look up behavior.
The Cancel() function is used to abort a pending resolution request. After calling
this function, Token.Status will be set to EFI_ABORTED and then Token.Event will be
signaled. If the token is not in one of the queues, which usually means that the
asynchronous operation has completed, this function will not signal the token and
EFI_NOT_FOUND is returned.
@param[in] This Pointer to EFI_DNS4_PROTOCOL instance.
@param[in] Token Pointer to a token that has been issued by
EFI_DNS4_PROTOCOL.HostNameToIp (),
EFI_DNS4_PROTOCOL.IpToHostName() or
EFI_DNS4_PROTOCOL.GeneralLookup().
If NULL, all pending tokens are aborted.
@retval EFI_SUCCESS Incoming or outgoing data was processed.
@retval EFI_NOT_STARTED This EFI DNS4 Protocol instance has not been started.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_NOT_FOUND When Token is not NULL, and the asynchronous DNS
operation was not found in the transmit queue. It
was either completed or was not issued by
HostNameToIp(), IpToHostName() or GeneralLookup().
**/
EFI_STATUS
EFIAPI
Dns4Cancel (
IN EFI_DNS4_PROTOCOL *This,
IN EFI_DNS4_COMPLETION_TOKEN *Token
)
{
EFI_STATUS Status;
DNS_INSTANCE *Instance;
EFI_TPL OldTpl;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = DNS_INSTANCE_FROM_THIS_PROTOCOL4 (This);
if (Instance->State == DNS_STATE_UNCONFIGED) {
return EFI_NOT_STARTED;
}
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
//
// Cancel the tokens specified by Token for this instance.
//
Status = Dns4InstanceCancelToken (Instance, Token);
//
// Dispatch the DPC queued by the NotifyFunction of the canceled token's events.
//
DispatchDpc ();
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Retrieve mode data of this DNS instance.
This function is used to retrieve DNS mode data for this DNS instance.
@param[in] This Pointer to EFI_DNS6_PROTOCOL instance.
@param[out] DnsModeData Pointer to the caller-allocated storage for the
EFI_DNS6_MODE_DATA data.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_NOT_STARTED When DnsConfigData is queried, no configuration data
is available because this instance has not been
configured.
@retval EFI_INVALID_PARAMETER This is NULL or DnsModeData is NULL.
@retval EFI_OUT_OF_RESOURCE Failed to allocate needed resources.
**/
EFI_STATUS
EFIAPI
Dns6GetModeData (
IN EFI_DNS6_PROTOCOL *This,
OUT EFI_DNS6_MODE_DATA *DnsModeData
)
{
DNS_INSTANCE *Instance;
EFI_TPL OldTpl;
UINTN Index;
LIST_ENTRY *Entry;
LIST_ENTRY *Next;
DNS6_SERVER_IP *ServerItem;
EFI_IPv6_ADDRESS *ServerList;
DNS6_CACHE *CacheItem;
EFI_DNS6_CACHE_ENTRY *CacheList;
EFI_STATUS Status;
ServerItem = NULL;
ServerList = NULL;
CacheItem = NULL;
CacheList = NULL;
Status = EFI_SUCCESS;
if ((This == NULL) || (DnsModeData == NULL)) {
return EFI_INVALID_PARAMETER;
}
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
Instance = DNS_INSTANCE_FROM_THIS_PROTOCOL6 (This);
if (Instance->State == DNS_STATE_UNCONFIGED) {
Status = EFI_NOT_STARTED;
goto ON_EXIT;
}
ZeroMem (DnsModeData, sizeof (EFI_DNS6_MODE_DATA));
//
// Get the current configuration data of this instance.
//
Status = Dns6CopyConfigure (&DnsModeData->DnsConfigData, &Instance->Dns6CfgData);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
//
// Get the DnsServerCount and DnsServerList
//
Index = 0;
NET_LIST_FOR_EACH_SAFE (Entry, Next, &mDriverData->Dns6ServerList) {
Index++;
}
DnsModeData->DnsServerCount = (UINT32)Index;
ServerList = AllocatePool (sizeof (EFI_IPv6_ADDRESS) * DnsModeData->DnsServerCount);
if (ServerList == NULL) {
Status = EFI_OUT_OF_RESOURCES;
Dns6CleanConfigure (&DnsModeData->DnsConfigData);
goto ON_EXIT;
}
Index = 0;
NET_LIST_FOR_EACH_SAFE (Entry, Next, &mDriverData->Dns6ServerList) {
ServerItem = NET_LIST_USER_STRUCT (Entry, DNS6_SERVER_IP, AllServerLink);
CopyMem (ServerList + Index, &ServerItem->Dns6ServerIp, sizeof (EFI_IPv6_ADDRESS));
Index++;
}
DnsModeData->DnsServerList = ServerList;
//
// Get the DnsCacheCount and DnsCacheList
//
Index = 0;
NET_LIST_FOR_EACH_SAFE (Entry, Next, &mDriverData->Dns6CacheList) {
Index++;
}
DnsModeData->DnsCacheCount = (UINT32)Index;
CacheList = AllocatePool (sizeof (EFI_DNS6_CACHE_ENTRY) * DnsModeData->DnsCacheCount);
if (CacheList == NULL) {
Status = EFI_OUT_OF_RESOURCES;
Dns6CleanConfigure (&DnsModeData->DnsConfigData);
FreePool (ServerList);
goto ON_EXIT;
}
Index = 0;
NET_LIST_FOR_EACH_SAFE (Entry, Next, &mDriverData->Dns6CacheList) {
CacheItem = NET_LIST_USER_STRUCT (Entry, DNS6_CACHE, AllCacheLink);
CopyMem (CacheList + Index, &CacheItem->DnsCache, sizeof (EFI_DNS6_CACHE_ENTRY));
Index++;
}
DnsModeData->DnsCacheList = CacheList;
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Configure this DNS instance.
The Configure() function is used to set and change the configuration data for this
EFI DNSv6 Protocol driver instance. Reset the DNS instance if DnsConfigData is NULL.
@param[in] This Pointer to EFI_DNS6_PROTOCOL instance.
@param[in] DnsConfigData Pointer to the configuration data structure. All associated
storage to be allocated and released by caller.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_INVALID_PARAMETER This is NULL.
The StationIp address provided in DnsConfigData is not zero and not a valid unicast.
DnsServerList is NULL while DnsServerList Count is not ZERO.
DnsServerList Count is ZERO while DnsServerList is not NULL.
@retval EFI_OUT_OF_RESOURCES The DNS instance data or required space could not be allocated.
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred. The
EFI DNSv6 Protocol instance is not configured.
@retval EFI_UNSUPPORTED The designated protocol is not supported.
@retval EFI_ALREADY_STARTED Second call to Configure() with DnsConfigData. To
reconfigure the instance the caller must call Configure() with
NULL first to return driver to unconfigured state.
**/
EFI_STATUS
EFIAPI
Dns6Configure (
IN EFI_DNS6_PROTOCOL *This,
IN EFI_DNS6_CONFIG_DATA *DnsConfigData
)
{
EFI_STATUS Status;
DNS_INSTANCE *Instance;
EFI_TPL OldTpl;
UINT32 ServerListCount;
EFI_IPv6_ADDRESS *ServerList;
Status = EFI_SUCCESS;
ServerList = NULL;
if ((This == NULL) ||
((DnsConfigData != NULL) && (((DnsConfigData->DnsServerCount != 0) && (DnsConfigData->DnsServerList == NULL)) ||
((DnsConfigData->DnsServerCount == 0) && (DnsConfigData->DnsServerList != NULL)))))
{
return EFI_INVALID_PARAMETER;
}
if ((DnsConfigData != NULL) && (DnsConfigData->Protocol != DNS_PROTOCOL_UDP)) {
return EFI_UNSUPPORTED;
}
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
Instance = DNS_INSTANCE_FROM_THIS_PROTOCOL6 (This);
if (DnsConfigData == NULL) {
ZeroMem (&Instance->SessionDnsServer, sizeof (EFI_IP_ADDRESS));
//
// Reset the Instance if ConfigData is NULL
//
if (!NetMapIsEmpty (&Instance->Dns6TxTokens)) {
Dns6InstanceCancelToken (Instance, NULL);
}
if (Instance->UdpIo != NULL) {
UdpIoCleanIo (Instance->UdpIo);
}
if (Instance->Dns6CfgData.DnsServerList != NULL) {
FreePool (Instance->Dns6CfgData.DnsServerList);
}
ZeroMem (&Instance->Dns6CfgData, sizeof (EFI_DNS6_CONFIG_DATA));
Instance->State = DNS_STATE_UNCONFIGED;
} else {
//
// Configure the parameters for new operation.
//
if (!NetIp6IsUnspecifiedAddr (&DnsConfigData->StationIp) && !NetIp6IsValidUnicast (&DnsConfigData->StationIp)) {
Status = EFI_INVALID_PARAMETER;
goto ON_EXIT;
}
Status = Dns6CopyConfigure (&Instance->Dns6CfgData, DnsConfigData);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
if (DnsConfigData->DnsServerCount == 0) {
gBS->RestoreTPL (OldTpl);
//
// The DNS instance will retrieve DNS server from DHCP Server.
//
Status = GetDns6ServerFromDhcp6 (
Instance->Service->ImageHandle,
Instance->Service->ControllerHandle,
&ServerListCount,
&ServerList
);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
ASSERT (ServerList != NULL);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
CopyMem (&Instance->SessionDnsServer.v6, &ServerList[0], sizeof (EFI_IPv6_ADDRESS));
} else {
CopyMem (&Instance->SessionDnsServer.v6, &DnsConfigData->DnsServerList[0], sizeof (EFI_IPv6_ADDRESS));
}
//
// Config UDP
//
gBS->RestoreTPL (OldTpl);
Status = Dns6ConfigUdp (Instance, Instance->UdpIo);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
if (EFI_ERROR (Status)) {
if (Instance->Dns6CfgData.DnsServerList != NULL) {
FreePool (Instance->Dns6CfgData.DnsServerList);
Instance->Dns6CfgData.DnsServerList = NULL;
}
goto ON_EXIT;
}
//
// Add configured DNS server used by this instance to ServerList.
//
Status = AddDns6ServerIp (&mDriverData->Dns6ServerList, Instance->SessionDnsServer.v6);
if (EFI_ERROR (Status)) {
if (Instance->Dns6CfgData.DnsServerList != NULL) {
FreePool (Instance->Dns6CfgData.DnsServerList);
Instance->Dns6CfgData.DnsServerList = NULL;
}
goto ON_EXIT;
}
Instance->State = DNS_STATE_CONFIGED;
}
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Host name to host address translation.
The HostNameToIp () function is used to translate the host name to host IP address. A
type AAAA query is used to get the one or more IPv6 addresses for this host.
@param[in] This Pointer to EFI_DNS6_PROTOCOL instance.
@param[in] HostName Host name.
@param[in] Token Point to the completion token to translate host name
to host address.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
This is NULL.
Token is NULL.
Token.Event is NULL.
HostName is NULL or buffer contained unsupported characters.
@retval EFI_NO_MAPPING There's no source address is available for use.
@retval EFI_ALREADY_STARTED This Token is being used in another DNS session.
@retval EFI_NOT_STARTED This instance has not been started.
@retval EFI_OUT_OF_RESOURCES Failed to allocate needed resources.
**/
EFI_STATUS
EFIAPI
Dns6HostNameToIp (
IN EFI_DNS6_PROTOCOL *This,
IN CHAR16 *HostName,
IN EFI_DNS6_COMPLETION_TOKEN *Token
)
{
EFI_STATUS Status;
DNS_INSTANCE *Instance;
EFI_DNS6_CONFIG_DATA *ConfigData;
UINTN Index;
DNS6_CACHE *Item;
LIST_ENTRY *Entry;
LIST_ENTRY *Next;
CHAR8 *QueryName;
DNS6_TOKEN_ENTRY *TokenEntry;
NET_BUF *Packet;
EFI_TPL OldTpl;
Status = EFI_SUCCESS;
Item = NULL;
QueryName = NULL;
TokenEntry = NULL;
Packet = NULL;
//
// Validate the parameters
//
if ((This == NULL) || (HostName == NULL) || (Token == NULL)) {
return EFI_INVALID_PARAMETER;
}
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
Instance = DNS_INSTANCE_FROM_THIS_PROTOCOL6 (This);
ConfigData = &(Instance->Dns6CfgData);
if (Instance->State != DNS_STATE_CONFIGED) {
Status = EFI_NOT_STARTED;
goto ON_EXIT;
}
Token->Status = EFI_NOT_READY;
//
// If zero, use the parameter configured through Dns.Configure() interface.
//
if (Token->RetryCount == 0) {
Token->RetryCount = ConfigData->RetryCount;
}
//
// If zero, use the parameter configured through Dns.Configure() interface.
//
if (Token->RetryInterval == 0) {
Token->RetryInterval = ConfigData->RetryInterval;
}
//
// Minimum interval of retry is 2 second. If the retry interval is less than 2 second, then use the 2 second.
//
if (Token->RetryInterval < DNS_DEFAULT_TIMEOUT) {
Token->RetryInterval = DNS_DEFAULT_TIMEOUT;
}
//
// Check cache
//
if (ConfigData->EnableDnsCache) {
Index = 0;
NET_LIST_FOR_EACH_SAFE (Entry, Next, &mDriverData->Dns6CacheList) {
Item = NET_LIST_USER_STRUCT (Entry, DNS6_CACHE, AllCacheLink);
if (StrCmp (HostName, Item->DnsCache.HostName) == 0) {
Index++;
}
}
if (Index != 0) {
Token->RspData.H2AData = AllocatePool (sizeof (DNS6_HOST_TO_ADDR_DATA));
if (Token->RspData.H2AData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
Token->RspData.H2AData->IpCount = (UINT32)Index;
Token->RspData.H2AData->IpList = AllocatePool (sizeof (EFI_IPv6_ADDRESS) * Index);
if (Token->RspData.H2AData->IpList == NULL) {
if (Token->RspData.H2AData != NULL) {
FreePool (Token->RspData.H2AData);
}
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
Index = 0;
NET_LIST_FOR_EACH_SAFE (Entry, Next, &mDriverData->Dns6CacheList) {
Item = NET_LIST_USER_STRUCT (Entry, DNS6_CACHE, AllCacheLink);
if (((UINT32)Index < Token->RspData.H2AData->IpCount) && (StrCmp (HostName, Item->DnsCache.HostName) == 0)) {
CopyMem ((Token->RspData.H2AData->IpList) + Index, Item->DnsCache.IpAddress, sizeof (EFI_IPv6_ADDRESS));
Index++;
}
}
Token->Status = EFI_SUCCESS;
if (Token->Event != NULL) {
gBS->SignalEvent (Token->Event);
DispatchDpc ();
}
Status = Token->Status;
goto ON_EXIT;
}
}
//
// Construct DNS TokenEntry.
//
TokenEntry = AllocateZeroPool (sizeof (DNS6_TOKEN_ENTRY));
if (TokenEntry == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
TokenEntry->PacketToLive = Token->RetryInterval;
TokenEntry->Token = Token;
TokenEntry->QueryHostName = AllocateZeroPool (StrSize (HostName));
if (TokenEntry->QueryHostName == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
CopyMem (TokenEntry->QueryHostName, HostName, StrSize (HostName));
//
// Construct QName.
//
QueryName = NetLibCreateDnsQName (TokenEntry->QueryHostName);
if (QueryName == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
//
// Construct DNS Query Packet.
//
Status = ConstructDNSQuery (Instance, QueryName, DNS_TYPE_AAAA, DNS_CLASS_INET, &Packet);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
ASSERT (Packet != NULL);
//
// Save the token into the Dns6TxTokens map.
//
Status = NetMapInsertTail (&Instance->Dns6TxTokens, TokenEntry, Packet);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
//
// Dns Query Ip
//
Status = DoDnsQuery (Instance, Packet);
if (EFI_ERROR (Status)) {
Dns6RemoveTokenEntry (&Instance->Dns6TxTokens, TokenEntry);
}
ON_EXIT:
if (EFI_ERROR (Status)) {
if (TokenEntry != NULL) {
if (TokenEntry->QueryHostName != NULL) {
FreePool (TokenEntry->QueryHostName);
}
FreePool (TokenEntry);
}
if (Packet != NULL) {
NetbufFree (Packet);
}
}
if (QueryName != NULL) {
FreePool (QueryName);
}
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Host address to host name translation.
The IpToHostName () function is used to translate the host address to host name. A
type PTR query is used to get the primary name of the host. Implementation can choose
to support this function or not.
@param[in] This Pointer to EFI_DNS6_PROTOCOL instance.
@param[in] IpAddress Ip Address.
@param[in] Token Point to the completion token to translate host
address to host name.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_UNSUPPORTED This function is not supported.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
This is NULL.
Token is NULL.
Token.Event is NULL.
IpAddress is not valid IP address.
@retval EFI_NO_MAPPING There's no source address is available for use.
@retval EFI_NOT_STARTED This instance has not been started.
@retval EFI_OUT_OF_RESOURCES Failed to allocate needed resources.
**/
EFI_STATUS
EFIAPI
Dns6IpToHostName (
IN EFI_DNS6_PROTOCOL *This,
IN EFI_IPv6_ADDRESS IpAddress,
IN EFI_DNS6_COMPLETION_TOKEN *Token
)
{
return EFI_UNSUPPORTED;
}
/**
This function provides capability to retrieve arbitrary information from the DNS
server.
This GeneralLookup() function retrieves arbitrary information from the DNS. The caller
supplies a QNAME, QTYPE, and QCLASS, and all of the matching RRs are returned. All
RR content (e.g., TTL) was returned. The caller need parse the returned RR to get
required information. The function is optional. Implementation can choose to support
it or not.
@param[in] This Pointer to EFI_DNS6_PROTOCOL instance.
@param[in] QName Pointer to Query Name.
@param[in] QType Query Type.
@param[in] QClass Query Name.
@param[in] Token Point to the completion token to retrieve arbitrary
information.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_UNSUPPORTED This function is not supported. Or the requested
QType is not supported
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
This is NULL.
Token is NULL.
Token.Event is NULL.
QName is NULL.
@retval EFI_NO_MAPPING There's no source address is available for use.
@retval EFI_NOT_STARTED This instance has not been started.
@retval EFI_OUT_OF_RESOURCES Failed to allocate needed resources.
**/
EFI_STATUS
EFIAPI
Dns6GeneralLookUp (
IN EFI_DNS6_PROTOCOL *This,
IN CHAR8 *QName,
IN UINT16 QType,
IN UINT16 QClass,
IN EFI_DNS6_COMPLETION_TOKEN *Token
)
{
EFI_STATUS Status;
DNS_INSTANCE *Instance;
EFI_DNS6_CONFIG_DATA *ConfigData;
DNS6_TOKEN_ENTRY *TokenEntry;
NET_BUF *Packet;
EFI_TPL OldTpl;
Status = EFI_SUCCESS;
TokenEntry = NULL;
Packet = NULL;
//
// Validate the parameters
//
if ((This == NULL) || (QName == NULL) || (Token == NULL)) {
return EFI_INVALID_PARAMETER;
}
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
Instance = DNS_INSTANCE_FROM_THIS_PROTOCOL6 (This);
ConfigData = &(Instance->Dns6CfgData);
if (Instance->State != DNS_STATE_CONFIGED) {
Status = EFI_NOT_STARTED;
goto ON_EXIT;
}
Token->Status = EFI_NOT_READY;
//
// If zero, use the parameter configured through Dns.Configure() interface.
//
if (Token->RetryCount == 0) {
Token->RetryCount = ConfigData->RetryCount;
}
//
// If zero, use the parameter configured through Dns.Configure() interface.
//
if (Token->RetryInterval == 0) {
Token->RetryInterval = ConfigData->RetryInterval;
}
//
// Minimum interval of retry is 2 second. If the retry interval is less than 2 second, then use the 2 second.
//
if (Token->RetryInterval < DNS_DEFAULT_TIMEOUT) {
Token->RetryInterval = DNS_DEFAULT_TIMEOUT;
}
//
// Construct DNS TokenEntry.
//
TokenEntry = AllocateZeroPool (sizeof (DNS6_TOKEN_ENTRY));
if (TokenEntry == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
TokenEntry->PacketToLive = Token->RetryInterval;
TokenEntry->GeneralLookUp = TRUE;
TokenEntry->Token = Token;
//
// Construct DNS Query Packet.
//
Status = ConstructDNSQuery (Instance, QName, QType, QClass, &Packet);
if (EFI_ERROR (Status)) {
if (TokenEntry != NULL) {
FreePool (TokenEntry);
}
goto ON_EXIT;
}
ASSERT (Packet != NULL);
//
// Save the token into the Dns6TxTokens map.
//
Status = NetMapInsertTail (&Instance->Dns6TxTokens, TokenEntry, Packet);
if (EFI_ERROR (Status)) {
if (TokenEntry != NULL) {
FreePool (TokenEntry);
}
NetbufFree (Packet);
goto ON_EXIT;
}
//
// Dns Query Ip
//
Status = DoDnsQuery (Instance, Packet);
if (EFI_ERROR (Status)) {
Dns6RemoveTokenEntry (&Instance->Dns6TxTokens, TokenEntry);
if (TokenEntry != NULL) {
FreePool (TokenEntry);
}
NetbufFree (Packet);
}
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
This function is to update the DNS Cache.
The UpdateDnsCache() function is used to add/delete/modify DNS cache entry. DNS cache
can be normally dynamically updated after the DNS resolve succeeds. This function
provided capability to manually add/delete/modify the DNS cache.
@param[in] This Pointer to EFI_DNS6_PROTOCOL instance.
@param[in] DeleteFlag If FALSE, this function is to add one entry to the
DNS Cache. If TRUE, this function will delete
matching DNS Cache entry.
@param[in] Override If TRUE, the matching DNS cache entry will be
overwritten with the supplied parameter. If FALSE,
EFI_ACCESS_DENIED will be returned if the entry to
be added is already existed.
@param[in] DnsCacheEntry Pointer to DNS Cache entry.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
This is NULL.
DnsCacheEntry.HostName is NULL.
DnsCacheEntry.IpAddress is NULL.
DnsCacheEntry.Timeout is zero.
@retval EFI_ACCESS_DENIED The DNS cache entry already exists and Override is
not TRUE.
@retval EFI_OUT_OF_RESOURCE Failed to allocate needed resources.
**/
EFI_STATUS
EFIAPI
Dns6UpdateDnsCache (
IN EFI_DNS6_PROTOCOL *This,
IN BOOLEAN DeleteFlag,
IN BOOLEAN Override,
IN EFI_DNS6_CACHE_ENTRY DnsCacheEntry
)
{
EFI_STATUS Status;
EFI_TPL OldTpl;
Status = EFI_SUCCESS;
if ((DnsCacheEntry.HostName == NULL) || (DnsCacheEntry.IpAddress == NULL) || (DnsCacheEntry.Timeout == 0)) {
return EFI_INVALID_PARAMETER;
}
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
//
// Update Dns6Cache here.
//
Status = UpdateDns6Cache (&mDriverData->Dns6CacheList, DeleteFlag, Override, DnsCacheEntry);
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Polls for incoming data packets and processes outgoing data packets.
The Poll() function can be used by network drivers and applications to increase the
rate that data packets are moved between the communications device and the transmit
and receive queues.
In some systems, the periodic timer event in the managed network driver may not poll
the underlying communications device fast enough to transmit and/or receive all data
packets without missing incoming packets or dropping outgoing packets. Drivers and
applications that are experiencing packet loss should try calling the Poll()
function more often.
@param[in] This Pointer to EFI_DNS6_PROTOCOL instance.
@retval EFI_SUCCESS Incoming or outgoing data was processed.
@retval EFI_NOT_STARTED This EFI DNS Protocol instance has not been started.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_NO_MAPPING There is no source address is available for use.
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
@retval EFI_TIMEOUT Data was dropped out of the transmit and/or receive
queue. Consider increasing the polling rate.
**/
EFI_STATUS
EFIAPI
Dns6Poll (
IN EFI_DNS6_PROTOCOL *This
)
{
DNS_INSTANCE *Instance;
EFI_UDP6_PROTOCOL *Udp;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = DNS_INSTANCE_FROM_THIS_PROTOCOL6 (This);
if (Instance->State == DNS_STATE_UNCONFIGED) {
return EFI_NOT_STARTED;
} else if (Instance->State == DNS_STATE_DESTROY) {
return EFI_DEVICE_ERROR;
}
Udp = Instance->UdpIo->Protocol.Udp6;
return Udp->Poll (Udp);
}
/**
Abort an asynchronous DNS operation, including translation between IP and Host, and
general look up behavior.
The Cancel() function is used to abort a pending resolution request. After calling
this function, Token.Status will be set to EFI_ABORTED and then Token.Event will be
signaled. If the token is not in one of the queues, which usually means that the
asynchronous operation has completed, this function will not signal the token and
EFI_NOT_FOUND is returned.
@param[in] This Pointer to EFI_DNS6_PROTOCOL instance.
@param[in] Token Pointer to a token that has been issued by
EFI_DNS6_PROTOCOL.HostNameToIp (),
EFI_DNS6_PROTOCOL.IpToHostName() or
EFI_DNS6_PROTOCOL.GeneralLookup().
If NULL, all pending tokens are aborted.
@retval EFI_SUCCESS Incoming or outgoing data was processed.
@retval EFI_NOT_STARTED This EFI DNS6 Protocol instance has not been started.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_NO_MAPPING There's no source address is available for use.
@retval EFI_NOT_FOUND When Token is not NULL, and the asynchronous DNS
operation was not found in the transmit queue. It
was either completed or was not issued by
HostNameToIp(), IpToHostName() or GeneralLookup().
**/
EFI_STATUS
EFIAPI
Dns6Cancel (
IN EFI_DNS6_PROTOCOL *This,
IN EFI_DNS6_COMPLETION_TOKEN *Token
)
{
EFI_STATUS Status;
DNS_INSTANCE *Instance;
EFI_TPL OldTpl;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = DNS_INSTANCE_FROM_THIS_PROTOCOL6 (This);
if (Instance->State == DNS_STATE_UNCONFIGED) {
return EFI_NOT_STARTED;
}
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
//
// Cancel the tokens specified by Token for this instance.
//
Status = Dns6InstanceCancelToken (Instance, Token);
//
// Dispatch the DPC queued by the NotifyFunction of the canceled token's events.
//
DispatchDpc ();
gBS->RestoreTPL (OldTpl);
return Status;
}
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