DnsModifyRecordsInSet_W (Windows Embedded CE 6.0)

1/6/2010

This function allows you to modify or remove multiple resource record sets that are associated with a specific name. This function uses Dynamic DNS as its underlying technology. Windows Embedded CE supports only the Unicode encoding, as indicated by the *_W suffix.

Syntax

DNS_STATUS WINAPI DnsModifyRecordsInSet_W(
  PDNS_RECORD pAddRecords,
  PDNS_RECORD pDeleteRecords,
  DWORD Options,
  HANDLE hContext,
  PIP4_ARRAY pServerList,
  PVOID pReserved
);

Parameters

• pAddRecords
  [in] Pointer to the DNS_RECORD structure containing the resource records to be added to the resource record set.

• pDeleteRecords
  [in] Pointer to the DNS_RECORD structure containing the resource records to be deleted from the resource record set.

• Options
  [in] Options to apply to the operation. The following table shows available options, which can be combined.

  Option	Description
  DNS_UPDATE_SECURITY_OFF	Does not attempt secure dynamic updates if names cannot be registered anonymously. This is the default setting.
  DNS_UPDATE_SECURITY_ON	Attempts nonsecure dynamic update. If refused, then attempts secure dynamic update.
  DNS_UPDATE_SECURITY_ONLY	Attempts secure dynamic updates only. Does not attempt anonymous name registration.

• hContext
  [in] Handle to the credentials of a specific account. This is used when secure dynamic update is required. This parameter is optional. For more information, see the Remarks section.

• pServerList
  [in] Pointer to an array of DNS server IP addresses to which the Find Authoritative Zone (FAZ) request is sent. Windows Embedded CE supports a maximum of one server listed in this parameter. Attempts to specify multiple DNS servers result in failure.

• pReserved
  Reserved for future use.

Return Value

Returns success confirmation upon successful completion. Otherwise, it returns the appropriate DNS-specific error code as defined in Winerror.h.

Remarks

Windows Embedded CE only allows A and AAAA records to be updated. See the Windns.h header file for a complete listing of record set types and their numeric representations.

On Windows Embedded CE, this hContext is not obtained by a call to DnsAcquireContextHandle, but is instead a SEC_WINNT_AUTH_IDENTITY_W structure filled with the appropriate settings and typecasted to be a HANDLE.

Security Note:
Because hContext might contain a user password, name, and domain information, calling functions should clear hContext when the data is no longer required.

If pDeleteRecords contains records that exist in the current set, this function deletes those records. Next, this function adds any records that are specified in pAddRecords.

To add a new record, you would provide no records in pDeleteRecords, and provide the record to be added in pAddRecords.

To modify a record, specify the record being modified in both pDeleteRecords and pAddRecords. This removes the old version of the record, and then adds the modified version.

To delete records, specify records to be deleted in pDeleteRecords and leave pAddRecords empty.

Multiple records can be added or deleted in a single call to DnsModifyRecordInSet. If a record specified in pAddRecords is already present, no change occurs.

If no server list is specified, the default name server is queried.

Unlike desktop versions of Windows, Windows Embedded CE does not have a registry key that sets the default security in authentication and that is used through DNS_UPDATE_SECURITY_USE_DEFAULT.

Requirements

See Also

Reference

DNS Functions

Concepts

TCP/IP and the DNS Client

Other Resources

SEC_WINNT_AUTH_IDENTITY