Section (3) inet_ntop
inet_ntop — convert IPv4 and IPv6 addresses from binary to text form
|const void *src,|
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
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:
srcpoints 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
dstmust be at least
srcpoints 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
dstmust be at least
returns a non-null pointer to
dst. NULL is returned if there
was an error, with
errno set to
indicate the error.
afwas not a valid address family.
The converted address string would exceed the size given by
For an explanation of the terms used in this section, see attributes(7).
||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.
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Copyright 2000 Sam Varshavchik <mrsamcourier-mta.com>
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References: RFC 2553