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_INETsrc 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_INET6src 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.
AF_INET6 converts
IPv6-mapped IPv4 addresses into an IPv6 format.
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