ConvertLengthToIpv4Mask function
The ConvertLengthToIpv4Mask function converts an IPv4 prefix length to an IPv4 subnet mask.
Syntax
NETIO_STATUS WINAPI ConvertLengthToIpv4Mask( _In_ ULONG MaskLength, _Out_ PULONG Mask );
Parameters
- MaskLength [in]
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The IPv4 prefix length, in bits.
- Mask [out]
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A pointer to a LONG value to hold the IPv4 subnet mask when the function returns successfully.
Return value
On success, ConvertLengthToIpv4Mask returns NO_ERROR. Any nonzero return value indicates failure and the Mask parameter is set to INADDR_NONE defined in the Ws2def.h header file.
| Error code | Meaning |
|---|---|
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One of the parameters was invalid. This error is returned if the MaskLength parameter was invalid. |
Remarks
The ConvertLengthToIpv4Mask 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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