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+/* Copyright (C) 1997-2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _ARPA_INET_H
+#define _ARPA_INET_H 1
+
+#include <features.h>
+#include <netinet/in.h> /* To define `struct in_addr'. */
+
+/* Type for length arguments in socket calls. */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+__BEGIN_DECLS
+
+/* Convert Internet host address from numbers-and-dots notation in CP
+ into binary data in network byte order. */
+extern in_addr_t inet_addr (const char *__cp) __THROW;
+
+/* Return the local host address part of the Internet address in IN. */
+extern in_addr_t inet_lnaof (struct in_addr __in) __THROW;
+
+/* Make Internet host address in network byte order by combining the
+ network number NET with the local address HOST. */
+extern struct in_addr inet_makeaddr (in_addr_t __net, in_addr_t __host)
+ __THROW;
+
+/* Return network number part of the Internet address IN. */
+extern in_addr_t inet_netof (struct in_addr __in) __THROW;
+
+/* Extract the network number in network byte order from the address
+ in numbers-and-dots natation starting at CP. */
+extern in_addr_t inet_network (const char *__cp) __THROW;
+
+/* Convert Internet number in IN to ASCII representation. The return value
+ is a pointer to an internal array containing the string. */
+extern char *inet_ntoa (struct in_addr __in) __THROW;
+
+/* Convert from presentation format of an Internet number in buffer
+ starting at CP to the binary network format and store result for
+ interface type AF in buffer starting at BUF. */
+extern int inet_pton (int __af, const char *__restrict __cp,
+ void *__restrict __buf) __THROW;
+
+/* Convert a Internet address in binary network format for interface
+ type AF in buffer starting at CP to presentation form and place
+ result in buffer of length LEN astarting at BUF. */
+extern const char *inet_ntop (int __af, const void *__restrict __cp,
+ char *__restrict __buf, socklen_t __len)
+ __THROW;
+
+
+/* The following functions are not part of XNS 5.2. */
+#ifdef __USE_MISC
+/* Convert Internet host address from numbers-and-dots notation in CP
+ into binary data and store the result in the structure INP. */
+extern int inet_aton (const char *__cp, struct in_addr *__inp) __THROW;
+
+/* Format a network number NET into presentation format and place result
+ in buffer starting at BUF with length of LEN bytes. */
+extern char *inet_neta (in_addr_t __net, char *__buf, size_t __len) __THROW;
+
+/* Convert network number for interface type AF in buffer starting at
+ CP to presentation format. The result will specifiy BITS bits of
+ the number. */
+extern char *inet_net_ntop (int __af, const void *__cp, int __bits,
+ char *__buf, size_t __len) __THROW;
+
+/* Convert network number for interface type AF from presentation in
+ buffer starting at CP to network format and store result int
+ buffer starting at BUF of size LEN. */
+extern int inet_net_pton (int __af, const char *__cp,
+ void *__buf, size_t __len) __THROW;
+
+/* Convert ASCII representation in hexadecimal form of the Internet
+ address to binary form and place result in buffer of length LEN
+ starting at BUF. */
+extern unsigned int inet_nsap_addr (const char *__cp,
+ unsigned char *__buf, int __len) __THROW;
+
+/* Convert internet address in binary form in LEN bytes starting at CP
+ a presentation form and place result in BUF. */
+extern char *inet_nsap_ntoa (int __len, const unsigned char *__cp,
+ char *__buf) __THROW;
+#endif
+
+__END_DECLS
+
+#endif /* arpa/inet.h */