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WSANtohl (Compact 2013)

  • Article

3/26/2014

This function converts a u_long from network byte order to host byte order.

Syntax

int WSANtohl(
  SOCKET s,
  u_long netlong,
  u_long FAR* lphostlong
);

Parameters

  • s
    [in] Descriptor identifying a socket.
  • netlong
    [in] 32-bit number in network byte order.
  • lphostlong
    [out] Pointer to a 32-bit number in host byte order.

Return Value

If no error occurs, this function returns zero. If an error occurs, a value of SOCKET_ERROR is returned, and a specific error code can be retrieved by calling the WSAGetLastError function.

The following table shows a list of possible error codes.

Error code

Description

WSANOTINITIALISED

A successful WSAStartup call must occur before using this function.

WSAENETDOWN

The network subsystem has failed.

WSAENOTSOCK

The descriptor is not a socket.

WSAEFAULT

The lphostlong parameter is not completely contained in a valid part of the user address space.

Remarks

This function takes a 32-bit number in the network byte order associated with socket s and returns a 32-bit number pointed to by the lphostlong parameter in host byte order.

Requirements

Header

winsock2.h

Library

Ws2.lib

See Also

Reference

Windows-Specific Extension Functions
htonl
htons
ntohl
ntohs
WSAHtonl
WSAHtons
WSANtohs
WSAGetLastError
WSAStartup