arpa_inet.h(0P) POSIX Programmer's Manual arpa_inet.h(0P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding
Linux manual page for details of Linux behavior), or the interface may
not be implemented on Linux.
arpa/inet.h — definitions for internet operations
The <arpa/inet.h> header shall define the in_port_t and in_addr_t types
as described in <netinet/in.h>.
The <arpa/inet.h> header shall define the in_addr structure as
described in <netinet/in.h>.
The <arpa/inet.h> header shall define the INET_ADDRSTRLEN and
INET6_ADDRSTRLEN macros as described in <netinet/in.h>.
The following shall be declared as functions, or defined as macros, or
both. If functions are declared, function prototypes shall be provided.
The <arpa/inet.h> header shall define the uint32_t and uint16_t types
as described in <inttypes.h>.
The following shall be declared as functions and may also be defined as
macros. Function prototypes shall be provided.
in_addr_t inet_addr(const char *);
char *inet_ntoa(struct in_addr);
const char *inet_ntop(int, const void *restrict, char *restrict,
int inet_pton(int, const char *restrict, void *restrict);
Inclusion of the <arpa/inet.h> header may also make visible all symbols
from <netinet/in.h> and <inttypes.h>.
The following sections are informative.
The System Interfaces volume of POSIX.1‐2008, htonl(), inet_addr(),
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
cal and Electronics Engineers, Inc and The Open Group. (This is
POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online
at http://www.unix.org/online.html .
Any typographical or formatting errors that appear in this page are
most likely to have been introduced during the conversion of the source
files to man page format. To report such errors, see https://www.ker‐
IEEE/The Open Group 2013 arpa_inet.h(0P)