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+'\" et
+.TH arpa_inet.h "0P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\"
+.SH 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.
+.\"
+.SH NAME
+arpa/inet.h
+\(em definitions for internet operations
+.SH SYNOPSIS
+.LP
+.nf
+#include <arpa/inet.h>
+.fi
+.SH DESCRIPTION
+The
+.IR <arpa/inet.h>
+header shall define the
+.BR in_port_t
+and
+.BR in_addr_t
+types as described in
+.IR <netinet/in.h> .
+.P
+The
+.IR <arpa/inet.h>
+header shall define the
+.BR in_addr
+structure as described in
+.IR <netinet/in.h> .
+.P
+The
+.IR <arpa/inet.h>
+header shall define the INET_ADDRSTRLEN
+and INET6_ADDRSTRLEN
+macros as described in
+.IR <netinet/in.h> .
+.P
+The following shall be declared as functions, or defined as macros,
+or both. If functions are declared, function prototypes shall be
+provided.
+.sp
+.RS 4
+.nf
+
+uint32_t htonl(uint32_t);
+uint16_t htons(uint16_t);
+uint32_t ntohl(uint32_t);
+uint16_t ntohs(uint16_t);
+.fi
+.P
+.RE
+.P
+The
+.IR <arpa/inet.h>
+header shall define the
+.BR uint32_t
+and
+.BR uint16_t
+types as described in
+.IR <inttypes.h> .
+.P
+The following shall be declared as functions and may also be defined as
+macros. Function prototypes shall be provided.
+.sp
+.RS 4
+.nf
+
+in_addr_t inet_addr(const char *);
+char *inet_ntoa(struct in_addr);
+const char *inet_ntop(int, const void *restrict, char *restrict,
+ socklen_t);
+int inet_pton(int, const char *restrict, void *restrict);
+.fi
+.P
+.RE
+.P
+Inclusion of the
+.IR <arpa/inet.h>
+header may also make visible all symbols from
+.IR <netinet/in.h>
+and
+.IR <inttypes.h> .
+.LP
+.IR "The following sections are informative."
+.SH "APPLICATION USAGE"
+None.
+.SH "RATIONALE"
+None.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+.IR "\fB<inttypes.h>\fP",
+.IR "\fB<netinet_in.h>\fP"
+.P
+The System Interfaces volume of POSIX.1\(hy2017,
+.IR "\fIhtonl\fR\^(\|)",
+.IR "\fIinet_addr\fR\^(\|)",
+.IR "\fIinet_ntop\fR\^(\|)"
+.\"
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1-2017, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 7, 2018 Edition,
+Copyright (C) 2018 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group.
+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.opengroup.org/unix/online.html .
+.PP
+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.kernel.org/doc/man-pages/reporting_bugs.html .