INET_NTOP(3) Linux Programmer's Manual INET_NTOP(3)
inet_ntop - convert IPv4 and IPv6 addresses from binary to text form
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() 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
src points to a struct in_addr (in network byte order) which is
converted to an IPv4 network address in the dotted-decimal for-
mat, "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 appro-
priate 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.
af was not a valid address family.
ENOSPC The converted address string would exceed the size given by cnt.
POSIX.1-2001. Note that RFC 2553 defines a prototype where the last
argument cnt 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.
getnameinfo(3), inet(3), inet_pton(3)
This page is part of release 3.05 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2008-06-18 INET_NTOP(3)