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inet_ntoa Function

The inet_ntoa function converts an (Ipv4) Internet network address into an ASCII string in Internet standard dotted-decimal format.

Syntax

char* FAR inet_ntoa(
  __in  struct   in_addr in
);

Parameter

in [in]

An in_addr structure that represents an Internet host address.

Rückgabewert

If no error occurs, inet_ntoa returns a character pointer to a static buffer containing the text address in standard ".'' notation. Otherwise, it returns NULL.

Hinweise

The inet_ntoa function takes an Internet address structure specified by the in parameter and returns a NULL-terminated ASCII string that represents the address in "." (dot) notation as in "192.168.16.0", an example of an IPv4 address in dotted-decimal notation. The string returned by inet_ntoa resides in memory that is allocated by Windows Sockets. The application should not make any assumptions about the way in which the memory is allocated. The string returned is guaranteed to be valid only until the next Windows Sockets function call is made within the same thread. Therefore, the data should be copied before another Windows Sockets call is made.

The WSAAddressToString function can be used to convert a sockaddr structure containing an IPv4 address to a string representation of an IPv4 address in Internet standard dotted-decimal notation. The advantage of the WSAAddressToString function is that it supports both IPv4 and IPv6 addresses. Another advantage of the WSAAddressToString function is that there are both ASCII and Unicode versions of this function.

On Windows Vista and later, the RtlIpv4AddressToString function can be used to convert an IPv4 address represented as an IN_ADDR structure to a string representation of an IPv4 address in Internet standard dotted-decimal notation. On Windows Vista and later, the RtlIpv6AddressToString function can be used to convert an IPv6 address represented as an IN6_ADDR structure to a string representation of an IPv6 address.

Anforderungen

Mindestens unterstützter Client

Windows 2000 Professional

Mindestens unterstützter Server

Windows 2000 Server

Header

Winsock2.h

Bibliothek

Ws2_32.lib

DLL

Ws2_32.dll

Siehe auch

Winsock Reference
Winsock Functions
in_addr
IN6_ADDR
inet_addr
InetNtop
RtlIpv4AddressToString
RtlIpv4AddressToStringEx
RtlIpv4StringToAddress
RtlIpv4StringToAddressEx
RtlIpv6AddressToString
RtlIpv6AddressToStringEx
RtlIpv6StringToAddress
RtlIpv6StringToAddressEx
SOCKADDR
WSAAddressToString

 

 

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