inet_ntop — Parse network address structures
#include <sys/types.h> #include <sys/socket.h> #include <arpa/inet.h>
const
char *inet_ntop( |
int | af, |
const void * | src, | |
char * | dst, | |
socklen_t | cnt) ; |
This function converts the network address structure
src
in the af
address family into a
character string, which is copied to a character buffer
dst
, which is
cnt
bytes long.
inet_ntop(3) 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(3). The following address families are currently supported:
AF_INET
src
points
to a struct
in_addr (network byte order format) which
is converted to an IPv4 network address in the
dotted-quad 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 (network byte order format) 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.
inet_ntop
() returns a
non-null pointer to dst
. NULL is returned if there
was an error, with errno
set to
EAFNOSUPPORT if af
was not set to a valid
address family, or to ENOSPC
if the converted address string would exceed the size of
dst
given by the
cnt
argument.
POSIX.1-2001. Note that RFC 2553 defines a prototype where
the last parameter cnt
is of type size_t
. Many systems follow
RFC 2553. Glibc 2.0 and 2.1 have size_t
, but 2.2 has
socklen_t
.
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