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IWMSAdminMulticastSink::get_MulticastTtl

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IWMSAdminMulticastSink::get_MulticastTtl

The get_MulticastTtl method retrieves the maximum number of intermediate router hops permitted for the multicast transmission.

Syntax

Parameters

plTtl

[out] Pointer to a long integer containing the time-to-live (TTL) value.

Return Values

If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.

Return code Number Description
E_INVALIDARG 0x80070057 The plTtl parameter is NULL.

Example Code

#include <windows.h>
#include <atlbase.h>    // Includes CComBSTR and CComVariant.

// To access system plug-in interfaces, the
// entire type library must be imported as shown.
#import "WMSServerTypeLib.dll" no_namespace named_guids \
                               raw_interfaces_only

// Declare variables and interfaces.
IWMSServer                    *pServer;
IWMSPublishingPoints          *pPubPoints;
IWMSPublishingPoint           *pPubPoint;
IWMSBroadcastPublishingPoint  *pBCPubPoint;
IWMSPlugins                   *pPlugins;
IWMSPlugin                    *pPlugin;
IDispatch                     *pDispatch;
IWMSAdminMulticastSink        *pAdminMulticastSink;

HRESULT         hr;
CComVariant     varIndex;
CComBSTR        bstrName;
CComBSTR        bstrFile;
long            lValue;

// Initialize the COM library and retrieve a pointer
// to an IWMSServer interface.
hr = CoInitialize(NULL);
hr = CoCreateInstance(CLSID_WMSServer,
                      NULL,
                      CLSCTX_ALL,
                      IID_IWMSServer,
                      (void **)&pServer);
if (FAILED(hr)) goto EXIT;

// Retrieve a pointer to the IWMSPublishingPoints
// interface and add a new broadcast publishing point.
hr = pServer->get_PublishingPoints(&pPubPoints);
if (FAILED(hr)) goto EXIT;

bstrName = "NewPubPoint";
bstrFile = "Push:*";
hr = pPubPoints->Add(bstrName, WMS_PUBLISHING_POINT_BROADCAST,
                     bstrFile, &pPubPoint);
if (FAILED(hr)) goto EXIT;

// Query the IWMSBroadcastPublishingPoint interface from
// the newly created publishing point.
hr = pPubPoint->QueryInterface(IID_IWMSBroadcastPublishingPoint,
                              (void **)&pBCPubPoint);
if (FAILED(hr)) goto EXIT;

// Retrieve a pointer to an IWMSPlugins interface
// containing broadcast data sink plug-ins.
hr = pBCPubPoint->get_BroadcastDataSinks(&pPlugins);
if (FAILED(hr)) goto EXIT;

// Retrieve a pointer to the IWMSPlugin interface
// of the plug-in to be configured.
varIndex = "WMS Multicast Data Writer";
hr = pPlugins->get_Item(varIndex, &pPlugin);
if (FAILED(hr)) goto EXIT;

// Retrieve a pointer to the custom interface
// of the plug-in.
hr = pPlugin->get_CustomInterface(&pDispatch);
if (FAILED(hr)) goto EXIT;

// Query the specific administration interface
// for the plug-in.
hr = pDispatch->QueryInterface(IID_IWMSAdminMulticastSink,
                              (void **)&pAdminMulticastSink);
if (FAILED(hr)) goto EXIT;

// Retrieve the maximum number of intermediate
// router hops permitted for the multicast broadcast.
hr = pAdminMulticastSink->get_MulticastTTL(&lValue);
if (FAILED(hr)) goto EXIT;

EXIT:
    // TODO: Release temporary COM objects and uninitialize COM.

Requirements

Library: WMSServerTypeLib.dll.

Platform: Windows Server 2003, Enterprise Edition; Windows Server 2003, Datacenter Edition; Windows Server 2008 Enterprise; Windows Server 2008 Datacenter.

See Also

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