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 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
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
For an explanation of the terms used in this section, see
|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
AF_INET6 converts IPv4-mapped IPv6 addresses into an IPv6 format.
getnameinfo(3), inet(3), inet_pton(3)
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Linux 2017-09-15 INET_NTOP(3)
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