ntohl function
The ntohl function converts a u_long from TCP/IP network order to host byte order (which is little-endian on Intel processors).
Syntax
u_long WSAAPI ntohl( _In_ u_long netlong );
Parameters
- netlong [in]
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A 32-bit number in TCP/IP network byte order.
Return value
The ntohl function returns the value supplied in the netlong parameter with the byte order reversed. If netlong is already in host byte order, then this function will reverse it. It is up to the application to determine if the byte order must be reversed.
Remarks
The ntohl function takes a 32-bit number in TCP/IP network byte order (the AF_INET or AF_INET6 address family) and returns a 32-bit number in host byte order.
The ntohl function can be used to convert an IPv4 address in network byte order to the IPv4 address in host byte order. This function does not do any checking to determine if the netlong parameter is a valid IPv4 address.
The ntohl function does not require that the Winsock DLL has previously been loaded with a successful call to the WSAStartup function.
(Windows Store apps): This API is supported.
Requirements
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Minimum supported client | Windows 2000 Professional [desktop apps only] |
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Minimum supported server | Windows 2000 Server [desktop apps only] |
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Header |
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Library |
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DLL |
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See also
- htond
- htonf
- htonl
- htonll
- htons
- inet_addr
- inet_ntoa
- InetNtop
- InetPton
- ntohd
- ntohf
- ntohs
- WSAHtonl
- WSAHtons
- WSANtohl
- WSANtohs
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Build date: 11/29/2012
