Domain Name System (DNS)
Overview of the Domain Name System (DNS) technology.
To develop Domain Name System (DNS), you need these headers:
For programming guidance for this technology, see:
Enumerations
| DNS_CHARSET The DNS_CHARSET enumeration specifies the character set used. |
| DNS_CONFIG_TYPE The DNS_CONFIG_TYPE enumeration provides DNS configuration type information. |
| DNS_FREE_TYPE The DNS_FREE_TYPE enumeration specifies the type of data to free. |
| DNS_NAME_FORMAT The DNS_NAME_FORMAT enumeration specifies name format information for DNS. |
| DNS_PROXY_INFORMATION_TYPE The DNS_PROXY_INFORMATION_TYPE enumeration defines the proxy information type in the DNS_PROXY_INFORMATION structure. |
Functions
| DNS_QUERY_COMPLETION_ROUTINE The DNS_QUERY_COMPLETION_ROUTINE callback is used to asynchronously return the results of a DNS query. |
| DNS_QUERY_RAW_COMPLETION_ROUTINE The function signature of an asynchronous callback function that you implement. The system calls your implementation with the results of a query that you initiated by calling DnsQueryRaw. |
| DNS_SERVICE_BROWSE_CALLBACK Used to asynchronously return the results of a DNS-SD query. |
| DNS_SERVICE_REGISTER_COMPLETE Used to notify your application that service registration has completed. |
| DNS_SERVICE_RESOLVE_COMPLETE Used to asynchronously return the results of a service resolve operation. |
| DnsAcquireContextHandle_A The DnsAcquireContextHandle function type acquires a context handle to a set of credentials. (ANSI) |
| DnsAcquireContextHandle_W The DnsAcquireContextHandle function type acquires a context handle to a set of credentials. (Unicode) |
| DnsCancelQuery The DnsCancelQuery function can be used to cancel a pending query to the DNS namespace. |
| DnsCancelQueryRaw Cancels a query that was initiated by calling DnsQueryRaw. |
| DnsExtractRecordsFromMessage_UTF8 The DnsExtractRecordsFromMessage function type extracts resource records (RR) from a DNS message, and stores those records in a DNS_RECORD structure. (DnsExtractRecordsFromMessage_UTF8) |
| DnsExtractRecordsFromMessage_W The DnsExtractRecordsFromMessage function type extracts resource records (RR) from a DNS message, and stores those records in a DNS_RECORD structure. (DnsExtractRecordsFromMessage_W) |
| DnsFree Frees memory allocated for DNS records that was obtained using the DnsQuery function. |
| DnsFreeCustomServers Frees the array of custom servers that was returned from a previous call to DnsGetApplicationSettings. |
| DnsFreeProxyName Frees memory allocated for the proxyName member of a DNS_PROXY_INFORMATION structure obtained using the DnsGetProxyInformation function. |
| DnsGetApplicationSettings Retrieves the per-application DNS settings. |
| DnsGetProxyInformation The DnsGetProxyInformation function returns the proxy information for a DNS server's name resolution policy table. |
| DnsModifyRecordsInSet_A Function adds, modifies or removes a Resource Record (RR) set that may have been previously registered with DNS servers. (DnsModifyRecordsInSet_A) |
| DnsModifyRecordsInSet_UTF8 Function adds, modifies or removes a Resource Record (RR) set that may have been previously registered with DNS servers. (DnsModifyRecordsInSet_UTF8) |
| DnsModifyRecordsInSet_W Function adds, modifies or removes a Resource Record (RR) set that may have been previously registered with DNS servers. (DnsModifyRecordsInSet_W) |
| DnsNameCompare The DnsNameCompare function compares two DNS names. (DnsNameCompare_UTF8) |
| DnsNameCompare_A The DnsNameCompare function compares two DNS names. (DnsNameCompare_A) |
| DnsNameCompare_W The DnsNameCompare function compares two DNS names. (DnsNameCompare_W) |
| DnsQuery_A Is the generic query interface to the DNS namespace, and provides application developers with a DNS query resolution interface. (DnsQuery_A) |
| DnsQuery_UTF8 Is the generic query interface to the DNS namespace, and provides application developers with a DNS query resolution interface. (DnsQuery_UTF8) |
| DnsQuery_W Is the generic query interface to the DNS namespace, and provides application developers with a DNS query resolution interface. (DnsQuery_W) |
| DnsQueryConfig The DnsQueryConfig function enables application programmers to query for the configuration of the local computer or a specific adapter. |
| DnsQueryEx The asynchronous generic query interface to the DNS namespace, and provides application developers with a DNS query resolution interface. |
| DnsQueryRaw Enables you to perform a DNS query that accepts either a raw packet containing a DNS query, or a query name and type. |
| DnsQueryRawResultFree Frees the memory allocated to a DNS_QUERY_RAW_RESULT structure object. |
| DnsRecordCompare The DnsRecordCompare function compares two DNS resource records (RR). |
| DnsRecordCopyEx The DnsRecordCopyEx function creates a copy of a specified resource record (RR). The DnsRecordCopyEx function is also capable of converting the character encoding during the copy operation. |
| DnsRecordListFree Frees memory allocated for DNS records obtained using the DnsQuery function. |
| DnsRecordSetCompare The DnsRecordSetCompare function compares two RR sets. |
| DnsRecordSetCopyEx The DnsRecordSetCopyEx function creates a copy of a specified resource record set. The DnsRecordSetCopyEx function is also capable of converting the character encoding during the copy operation. |
| DnsRecordSetDetach The DnsRecordSetDetach function detaches the first record set from a specified list of DNS records. |
| DnsReleaseContextHandle The DnsReleaseContextHandle function releases memory used to store the credentials of a specific account. |
| DnsReplaceRecordSetA Replaces an existing resource record (RR) set. (DnsReplaceRecordSetA) |
| DnsReplaceRecordSetUTF8 Replaces an existing resource record (RR) set. (DnsReplaceRecordSetUTF8) |
| DnsReplaceRecordSetW Replaces an existing resource record (RR) set. (DnsReplaceRecordSetW) |
| DnsServiceBrowse Used to initiate a DNS-SD discovery for services running on the local network. |
| DnsServiceBrowseCancel Used to cancel a running DNS-SD discovery query. |
| DnsServiceConstructInstance Used to build a DNS_SERVICE_INSTANCE structure from data that describes it. |
| DnsServiceCopyInstance Used to copy a DNS_SERVICE_INSTANCE structure. |
| DnsServiceDeRegister Used to remove a registered service. |
| DnsServiceFreeInstance Used to free the resources associated with a DNS_SERVICE_INSTANCE structure. |
| DnsServiceRegister Used to register a discoverable service on this device. (DnsServiceRegister) |
| DnsServiceRegisterCancel Used to cancel a pending registration operation. |
| DnsServiceResolve Used to obtain more information about a service advertised on the local network. |
| DnsServiceResolveCancel Used to cancel a running DNS-SD resolve query. |
| DnsSetApplicationSettings Configures per-application DNS settings. This includes the ability to set per-application DNS servers either as fallback to the system configured servers, or exclusively. |
| DnsStartMulticastQuery Used to register a discoverable service on this device. (DnsStartMulticastQuery) |
| DnsStopMulticastQuery Used to stop a running DnsStartMulticastQuery operation. |
| DnsValidateName The DnsValidateName macro (windns.h) function validates the status of a specified DNS name. |
| DnsValidateName_A The DnsValidateName function validates the status of a specified DNS name. (DnsValidateName_A) |
| DnsValidateName_UTF8 The DnsValidateName_UTF8 function (windns.h) function validates the status of a specified DNS name. |
| DnsValidateName_W The DnsValidateName function validates the status of a specified DNS name. (DnsValidateName_W) |
| DnsValidateServerStatus The DnsValidateServerStatus function validates an IP address as a suitable DNS server. |
| DnsWriteQuestionToBuffer_UTF8 The DnsWriteQuestionToBuffer function type creates a DNS query message and stores it in a DNS_MESSAGE_BUFFER structure. (DnsWriteQuestionToBuffer_UTF8) |
| DnsWriteQuestionToBuffer_W The DnsWriteQuestionToBuffer function type creates a DNS query message and stores it in a DNS_MESSAGE_BUFFER structure. (DnsWriteQuestionToBuffer_W) |
| MDNS_QUERY_CALLBACK Used to asynchronously return the results of an mDNS query. |
Structures
| DNS_ADDR A DNS_ADDR structure stores an IPv4 or IPv6 address. |
| DNS_ADDR_ARRAY Stores an array of IPv4 or IPv6 addresses. |
| DNS_APPLICATION_SETTINGS Represents per-application DNS settings. |
| DNS_HEADER The DNS_HEADER structure contains DNS header information used when sending DNS messages as specified in section 4.1.1 of RFC 1035. |
| DNS_MESSAGE_BUFFER The DNS_MESSAGE_BUFFER structure stores message information for DNS queries. |
| DNS_PROXY_INFORMATION Contains the proxy information for a DNS server's name resolution policy table. |
| DNS_QUERY_CANCEL A DNS_QUERY_CANCEL structure can be used to cancel an asynchronous DNS query. |
| DNS_QUERY_RAW_CANCEL Represents a DNS raw query cancel handle. |
| DNS_QUERY_RAW_REQUEST Represents a DNS raw query request (see DnsQueryRaw). |
| DNS_QUERY_RAW_RESULT Represents a DNS raw query result (see DNS_QUERY_RAW_COMPLETION_ROUTINE). |
| DNS_QUERY_REQUEST The DNS_QUERY_REQUEST structure contains the DNS query parameters used in a call to DnsQueryEx. |
| DNS_QUERY_REQUEST3 Contains the DNS query parameters used in a call to DnsQueryEx. |
| DNS_QUERY_RESULT A DNS_QUERY_RESULT structure contains the DNS query results returned from a call to DnsQueryEx. |
| DNS_RRSET The DNS_RRSET structure contains information about a DNS Resource Record (RR) set. |
| DNS_SERVICE_BROWSE_REQUEST Contains the query parameters used in a call to DnsServiceBrowse. |
| DNS_SERVICE_CANCEL Used to cancel an asynchronous DNS-SD operation. |
| DNS_SERVICE_INSTANCE Represents a DNS service running on the network. |
| DNS_SERVICE_REGISTER_REQUEST Contains the information necessary to advertise a service using DnsServiceRegister, or to stop advertising it using DnsServiceDeRegister. |
| DNS_SERVICE_RESOLVE_REQUEST Contains the query parameters used in a call to DnsServiceResolve. |
| DNS_WIRE_QUESTION The DNS_WIRE_QUESTION structure contains information about a DNS question transmitted across the network as specified in section 4.1.2 of RFC 1035.. |
| DNS_WIRE_RECORD The DNS_WIRE_RECORD structure contains information about a DNS wire record transmitted across the network as specified in section 4.1.3 of RFC 1035. |
| IP4_ARRAY The IP4_ARRAY structure stores an array of IPv4 addresses. |
| MDNS_QUERY_HANDLE Contains information related to an ongoing MDNS query. Your application must not modify its contents. |
| MDNS_QUERY_REQUEST Contains the necessary information to perform an mDNS query. |