inet_ntop - convert IPv4 and IPv6 addresses from binary to text form
#include <arpa/inet.h>
const char *inet_ntop(int af, const void *restrict src,
char dst[restrict .size], socklen_t size);
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:
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.
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.
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.
See inet_pton(3).
getnameinfo(3), inet(3), inet_pton(3)