1/* Copyright (C) 1997-2020 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#ifndef _ARPA_INET_H
19#define _ARPA_INET_H 1
20
21#include <features.h>
22#include <netinet/in.h> /* To define `struct in_addr'. */
23
24/* Type for length arguments in socket calls. */
25#ifndef __socklen_t_defined
26typedef __socklen_t socklen_t;
27# define __socklen_t_defined
28#endif
29
30__BEGIN_DECLS
31
32/* Convert Internet host address from numbers-and-dots notation in CP
33 into binary data in network byte order. */
34extern in_addr_t inet_addr (const char *__cp) __THROW;
35
36/* Return the local host address part of the Internet address in IN. */
37extern in_addr_t inet_lnaof (struct in_addr __in) __THROW;
38
39/* Make Internet host address in network byte order by combining the
40 network number NET with the local address HOST. */
41extern struct in_addr inet_makeaddr (in_addr_t __net, in_addr_t __host)
42 __THROW;
43
44/* Return network number part of the Internet address IN. */
45extern in_addr_t inet_netof (struct in_addr __in) __THROW;
46
47/* Extract the network number in network byte order from the address
48 in numbers-and-dots natation starting at CP. */
49extern in_addr_t inet_network (const char *__cp) __THROW;
50
51/* Convert Internet number in IN to ASCII representation. The return value
52 is a pointer to an internal array containing the string. */
53extern char *inet_ntoa (struct in_addr __in) __THROW;
54
55/* Convert from presentation format of an Internet number in buffer
56 starting at CP to the binary network format and store result for
57 interface type AF in buffer starting at BUF. */
58extern int inet_pton (int __af, const char *__restrict __cp,
59 void *__restrict __buf) __THROW;
60
61/* Convert a Internet address in binary network format for interface
62 type AF in buffer starting at CP to presentation form and place
63 result in buffer of length LEN astarting at BUF. */
64extern const char *inet_ntop (int __af, const void *__restrict __cp,
65 char *__restrict __buf, socklen_t __len)
66 __THROW;
67
68
69/* The following functions are not part of XNS 5.2. */
70#ifdef __USE_MISC
71/* Convert Internet host address from numbers-and-dots notation in CP
72 into binary data and store the result in the structure INP. */
73extern int inet_aton (const char *__cp, struct in_addr *__inp) __THROW;
74
75/* Format a network number NET into presentation format and place result
76 in buffer starting at BUF with length of LEN bytes. */
77extern char *inet_neta (in_addr_t __net, char *__buf, size_t __len) __THROW;
78
79/* Convert network number for interface type AF in buffer starting at
80 CP to presentation format. The result will specifiy BITS bits of
81 the number. */
82extern char *inet_net_ntop (int __af, const void *__cp, int __bits,
83 char *__buf, size_t __len) __THROW;
84
85/* Convert network number for interface type AF from presentation in
86 buffer starting at CP to network format and store result int
87 buffer starting at BUF of size LEN. */
88extern int inet_net_pton (int __af, const char *__cp,
89 void *__buf, size_t __len) __THROW;
90
91/* Convert ASCII representation in hexadecimal form of the Internet
92 address to binary form and place result in buffer of length LEN
93 starting at BUF. */
94extern unsigned int inet_nsap_addr (const char *__cp,
95 unsigned char *__buf, int __len) __THROW;
96
97/* Convert internet address in binary form in LEN bytes starting at CP
98 a presentation form and place result in BUF. */
99extern char *inet_nsap_ntoa (int __len, const unsigned char *__cp,
100 char *__buf) __THROW;
101#endif
102
103__END_DECLS
104
105#endif /* arpa/inet.h */
106