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The SetIpStatistics function toggles IP forwarding on or off and sets the default time-to-live (TTL) value for the local computer.
Syntax
IPHLPAPI_DLL_LINKAGE DWORD SetIpStatistics(
[in] PMIB_IPSTATS pIpStats
);
Parameters
[in] pIpStats
A pointer to a MIB_IPSTATS structure. The caller should set the dwForwarding and dwDefaultTTL members of this structure to the new values. To keep one of the members at its current value, use MIB_USE_CURRENT_TTL or MIB_USE_CURRENT_FORWARDING.
Return value
If the function succeeds, the return value is NO_ERROR.
If the function fails, the return value is one of the following error codes.
| Return code | Description |
|---|---|
|
Access is denied. This error is returned on Windows Vista and Windows Server 2008 under several conditions that include the following: the user lacks the required administrative privileges on the local computer or the application is not running in an enhanced shell as the built-in Administrator (RunAs administrator). |
|
An invalid parameter was passed to the function. This error is returned if a NULL pointer is passed in the pIpStats parameter. This error is also returned if the dwForwarding member in the MIB_IPSTATS structure pointed to by the pIpStats parameter contains a value other than MIB_IP_NOT_FORWARDING, MIB_IP_FORWARDING, or MIB_USE_CURRENT_FORWARDING. |
|
Use FormatMessage to obtain the message string for the returned error. |
Remarks
To set only the default TTL, the caller can also use the SetIpTTL function.
On Windows Vista and later, the SetIpStatistics function can only be called by a user logged on as a member of the Administrators group. If SetIpStatistics is called by a user that is not a member of the Administrators group, the function call will fail and ERROR_ACCESS_DENIED is returned.
The SetIpStatistics function can also fail because of user account control (UAC) on Windows Vista and later. If an application that contains this function is executed by a user logged on as a member of the Administrators group other than the built-in Administrator, this call will fail unless the application has been marked in the manifest file with a requestedExecutionLevel set to requireAdministrator. If the application lacks this manifest file, a user logged on as a member of the Administrators group other than the built-in Administrator must then be executing the application in an enhanced shell as the built-in Administrator (RunAs administrator) for this function to succeed.
Note On Windows NT 4.0 and Windows 2000 and later, this function executes a privileged operation. For this function to execute successfully, the caller must be logged on as a member of the Administrators group or the NetworkConfigurationOperators group.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | iphlpapi.h |
| Library | Iphlpapi.lib |
| DLL | Iphlpapi.dll |