inet_ntop (3) Linux Manual Page
inet_ntop – convert IPv4 and IPv6 addresses from binary to text form
Synopsis
#include <arpa/inet.h>
const char *inet_ntop(int af, const void *src,
char *dst, socklen_t size);
Description
This function converts the network address structure src in the af address family into a character string. The resulting string is copied to the buffer pointed to by dst, which must be a non-null pointer. The caller specifies the number of bytes available in this buffer in the argument size. inet_ntop() extends the inet_ntoa(3) function to support multiple address families, inet_ntoa(3) is now considered to be deprecated in favor of inet_ntop(). The following address families are currently supported:
- AF_INET
- src points to a struct in_addr (in network byte order) which is converted to an IPv4 network address in the dotted-decimal format, "ddd.ddd.ddd.ddd". The buffer dst must be at least INET_ADDRSTRLEN bytes long.
- AF_INET6
- src points to a struct in6_addr (in network byte order) which is converted to a representation of this address in the most appropriate IPv6 network address format for this address. The buffer dst must be at least INET6_ADDRSTRLEN bytes long.
Return Value
On success, inet_ntop() returns a non-null pointer to dst. NULL is returned if there was an error, with errno set to indicate the error.Errors
- EAFNOSUPPORT
- af was not a valid address family.
- ENOSPC
- The converted address string would exceed the size given by size.
Attributes
For an explanation of the terms used in this section, see attributes(7).| Interface | Attribute | Value |
| inet_ntop() | Thread safety | MT-Safe locale |