ConvertIpv4MaskToLength function
The ConvertIpv4MaskToLength function converts an IPv4 subnet mask to an IPv4 prefix length.
Syntax
NETIO_STATUS WINAPI ConvertIpv4MaskToLength( _In_ ULONG Mask, _Out_ PUINT8 MaskLength );
Parameters
- Mask [in]
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The IPv4 subnet mask.
- MaskLength [out]
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A pointer to a UINT8 value to hold the IPv4 prefix length, in bits, when the function returns successfully.
Return value
On success, ConvertIpv4MaskToLength returns NO_ERROR. Any nonzero return value indicates failure.
| Error code | Meaning |
|---|---|
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One of the parameters was invalid. This error is returned if the Mask parameter was invalid. |
Remarks
The ConvertIpv4MaskToLength function is available on Windows Vista and later.
Requirements
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Minimum supported client |
Windows Vista [desktop apps only] |
|---|---|
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Minimum supported server |
Windows Server 2008 [desktop apps only] |
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Header |
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Library |
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DLL |
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See also
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