The inet_ntoa function converts an (Ipv4) Internet network address into an ASCII string in Internet standard dotted-decimal format.
- in [in]
An in_addr structure that represents an Internet host address.
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.
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.
Windows Phone 8: This API is supported.
Minimum supported client
|Windows 2000 Professional [desktop apps only]|
Minimum supported server
|Windows 2000 Server [desktop apps only]|
- Winsock Reference
- Winsock Functions