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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | CONFORMING TO | BUGS | EXAMPLE | SEE ALSO | COLOPHON |
INET_NTOP(3) Linux Programmer's Manual INET_NTOP(3)
inet_ntop - convert IPv4 and IPv6 addresses from binary to text form
#include <arpa/inet.h>
const char *inet_ntop(int af, const void *src,
char *dst, 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:
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.
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.
EAFNOSUPPORT
af was not a valid address family.
ENOSPC The converted address string would exceed the size given by
size.
For an explanation of the terms used in this section, see
attributes(7).
┌────────────┬───────────────┬────────────────┐
│Interface │ Attribute │ Value │
├────────────┼───────────────┼────────────────┤
│inet_ntop() │ Thread safety │ MT-Safe locale │
└────────────┴───────────────┴────────────────┘
POSIX.1-2001, POSIX.1-2008. Note that RFC 2553 defines a prototype
where the last argument size is of type size_t. Many systems follow
RFC 2553. Glibc 2.0 and 2.1 have size_t, but 2.2 and later have
socklen_t.
AF_INET6 converts IPv4-mapped IPv6 addresses into an IPv6 format.
See inet_pton(3).
getnameinfo(3), inet(3), inet_pton(3)
This page is part of release 4.12 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
Linux 2015-08-08 INET_NTOP(3)
Pages that refer to this page: gethostbyname(3), getipnodebyname(3), getnameinfo(3), inet(3), inet_pton(3)