NSPSetService Function
The NSPSetService function registers or deregisters a service instance within a namespace.
Syntax
int WSAAPI NSPSetService(
__in LPGUID lpProviderId,
__in LPWSASERVICECLASSINFOW lpServiceClassInfo,
__in LPWSAQUERYSETW lpqsRegInfo,
__in WSAESETSERVICEOP essOperation,
__in DWORD dwControlFlags
);
Parameter
lpProviderId [in]
A pointer to the GUID of the specific namespace provider in which the service is registered.lpServiceClassInfo [in]
The service class schema information.lpqsRegInfo [in]
The property information to be updated upon registration.essOperation [in]
The type of operation requested.This parameter can be one of the values from the WSAESETSERVICEOP enumeration type defined in the Winsock2.h header file.
Wert Bedeutung RNRSERVICE_REGISTER 0 Register the service. For the Service Advertising Protocol (SAP) namespace used within a NetWare environment, this means sending a periodic broadcast. This is an NOP for the Domain Name System (DNS) namespace. For persistent data stores this means updating the address information.
RNRSERVICE_DEREGISTER 1 Deregister the service. For the SAP namespace, this means stop sending the periodic broadcast. This is a NOP for the DNS namespace. For persistent data stores this means deleting address information.
RNRSERVICE_DELETE 2 Delete the service from dynamic name and persistent spaces. For services represented by multiple CSADDR_INFO structures (using the SERVICE_MULTIPLE flag), only the supplied address will be deleted, and this must match exactly the corresponding CSADDR_INFO structure supplied when the service was registered.
dwControlFlags [in]
A set of flags that controls the service operation requested.The possible values for this parameter are defined in the Winsock2.h header file.
Wert Bedeutung SERVICE_MULTIPLE 0x00000001 Control the scope of the operation.
When this value is set, the action is only performed on the given address set. A register operation does not invalidate existing addresses and a deregister operation only invalidates the given set of addresses.
When this value is absent, service addresses are managed as a group. A register or deregister invalidates all existing addresses before adding the given address set.
Rückgabewert
The function should return NO_ERROR (zero) if the routine succeeds. It should return SOCKET_ERROR (–1) if the routine fails and it must set the appropriate error code using WSASetLastError.
| Error code | Meaning |
|---|---|
| WSAEACCES | The calling routine does not have sufficient privileges to install the service. |
| WSA_NOT_ENOUGH_MEMORY | There is not enough memory available to perform this operation. |
| WSAEINVAL | One or more parameters were invalid, or missing, for this provider. |
| WSAEOPNOTSUPP | The operation is not supported. This error is returned if the namespace provider does not implement this function. |
| WSASERVICE_NOT_FOUND | Service is unknown. The service cannot be found in the specified namespace. |
Hinweise
The following table lists the available values for essOperation and dwControlFlags.
| Operation | Flags | Service already exists | Service does not exist |
|---|---|---|---|
| RNRSERVICE_REGISTER | None | Overwrites the object. Uses only addresses specified. Object is REGISTERED. | Creates a new object. Uses only addresses specified. Object is REGISTERED. |
| RNRSERVICE_REGISTER | SERVICE_MULTIPLE | Updates object. Adds new addresses to existing set. Object is REGISTERED. | Creates a new object. Uses all addresses specified. Object is REGISTERED. |
| RNRSERVICE_DEREGISTER | None | Removes all addresses, but does not remove object from namespace. Object is DEREGISTERED. | WSASERVICE_NOT_FOUND |
| RNRSERVICE_DEREGISTER | SERVICE_MULTIPLE | Updates object. Removes only addresses that are specified. Only mark object as DEREGISTERED if no addresses are present. Does not remove from the namespace. | WSASERVICE_NOT_FOUND |
| RNRSERVICE_DELETE | None | Removes object from the namespace. | WSASERVICE_NOT_FOUND |
| RNRSERVICE_DELETE | SERVICE_MULTIPLE | Removes only addresses that are specified. Only removes object from the namespace if no addresses remain. | WSASERVICE_NOT_FOUND |
When the dwControlFlags parameter is set to SERVICE_MULTIPLE, this enables an application to manage its addresses independently. This is useful when the application must manage its protocols individually or when the service resides on more than one computer. For example, when a service uses more than one protocol, one listening socket may abort, but the other sockets remain operational. In this example, the service could deregister the aborted address without affecting the other addresses.
When using SERVICE_MULTIPLE, an application must not let old addresses remain in the object. This can happen if the application aborts without issuing a RNRSERVICE_DEREGISTER request. When a service registers, it should store its addresses. On its next call, the service should explicitly deregister these old addresses before registering new addresses.
Service Properties
The following table lists WSAQUERYSET member names and describes how service property data is represented. Members labeled as (Optional) can be supplied with a null pointer.
| WSAQUERYSET member name | Service property description |
|---|---|
| dwSize | Set to the sizeof(WSAQUERYSET). This is a versioning mechanism. |
| lpszServiceInstanceName | The referenced string contains the service instance name. |
| lpServiceClassId | The GUID that corresponds to this service class. |
| lpVersion | Optional. Supplies the service instance version number. |
| lpszComment | Optional. An optional comment string. |
| dwNameSpace | Ignored for this operation. |
| lpNSProviderId | Ignored for this operation. The provider identifier is contained in the lpProviderId parameter. |
| lpszContext | Optional. The starting point of the query in a hierarchical namespace. |
| dwNumberOfProtocols | Ignored for this operation. |
| lpafpProtocols | Ignored for this operation. |
| pszQueryString | Ignored for this operation. |
| dwNumberOfCsAddrs | The number of elements in the array of CSADDR_INFO structures referenced by lpcsaBuffer. |
| lpcsaBuffer | A pointer to an array of CSADDR_INFO structures that contain the address or addresses that the service is listening on. |
| dwOutputFlags | Ignored for this operation. |
| lpBlob | Optional. Pointer to a provider-specific entity. |
Hinweis It is acceptable for the iProtocol member of the CSADDR_INFO structure to contain the manifest constant IPROTOCOL_ANY, indicating a wildcard value. The namespace provider should substitute an acceptable value for the given address family and socket type.
Anforderungen
Mindestens unterstützter Client |
Windows 2000 Professional |
Mindestens unterstützter Server |
Windows 2000 Server |
Header |
Ws2spi.h |