octave-shane/gnulib-hg: lib/inet

annotate lib/inet_ntop.c @ 15633:c2c292001fc0

inet_ntop: Support for MSVC on Windows Vista or newer. * lib/arpa_inet.in.h (inet_ntop): Also consider REPLACE_INET_NTOP. * lib/inet_ntop.c (rpl_inet_ntop): Use a simple wrapper if HAVE_DECL_INET_NTOP is defined. * m4/inet_ntop.m4 (gl_FUNC_INET_NTOP): Invoke gl_PREREQ_SYS_H_WINSOCK2. On platforms with <winsock2.h>, test whether inet_ntop is declared in <ws2tcpip.h>. If so, arrange to replace it. * m4/arpa_inet_h.m4 (gl_ARPA_INET_H_DEFAULTS): Initialize REPLACE_INET_NTOP. * modules/arpa_inet (Makefile.am): Substitute REPLACE_INET_NTOP. * modules/inet_ntop (Files): Add m4/sys_socket_h.m4. (Depends-on, configure.ac): Update condition. * doc/posix-functions/inet_ntop.texi: Mention the MSVC problem.

author	Bruno Haible <bruno@clisp.org>
date	Sat, 17 Sep 2011 14:56:11 +0200
parents	97fc9a21a8fb
children	8250f2777afc

rev	line source
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	1 /* inet_ntop.c -- convert IPv4 and IPv6 addresses from binary to text form
7302 8a1a9361108c * _fpending.c: Include <config.h> unconditionally, since we no Paul Eggert <eggert@cs.ucla.edu> parents: 6841 diff changeset	2
14079 97fc9a21a8fb maint: update almost all copyright ranges to include 2011 Jim Meyering <meyering@redhat.com> parents: 13787 diff changeset	3 Copyright (C) 2005-2006, 2008-2011 Free Software Foundation, Inc.
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	4
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	5 This program is free software; you can redistribute it and/or modify
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	6 it under the terms of the GNU General Public License as published by
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	7 the Free Software Foundation; either version 2, or (at your option)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	8 any later version.
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	9
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	10 This program is distributed in the hope that it will be useful,
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	11 but WITHOUT ANY WARRANTY; without even the implied warranty of
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	13 GNU General Public License for more details.
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	14
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	15 You should have received a copy of the GNU General Public License
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	16 along with this program; if not, write to the Free Software Foundation,
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	18
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	19 /*
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	20 * Copyright (c) 1996-1999 by Internet Software Consortium.
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	21 *
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	22 * Permission to use, copy, modify, and distribute this software for any
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	23 * purpose with or without fee is hereby granted, provided that the above
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	24 * copyright notice and this permission notice appear in all copies.
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	25 *
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	26 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	27 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	28 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	29 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	30 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	31 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	32 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	33 * SOFTWARE.
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	34 */
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	35
7302 8a1a9361108c * _fpending.c: Include <config.h> unconditionally, since we no Paul Eggert <eggert@cs.ucla.edu> parents: 6841 diff changeset	36 #include <config.h>
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	37
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	38 /* Specification. */
9993 4d5ba95a0dec Move inet_ntop and inet_pton declarations to arpa/inet.h. Simon Josefsson <simon@josefsson.org> parents: 7302 diff changeset	39 #include <arpa/inet.h>
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	40
15633 c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	41 #if HAVE_DECL_INET_NTOP
c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	42
c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	43 # undef inet_ntop
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	44
15633 c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	45 const char *
c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	46 rpl_inet_ntop (int af, const void *restrict src,
c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	47 char *restrict dst, socklen_t cnt)
c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	48 {
c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	49 return inet_ntop (af, src, dst, cnt);
c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	50 }
c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	51
c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	52 #else
c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	53
c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	54 # include <stdio.h>
c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	55 # include <string.h>
c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	56 # include <errno.h>
c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	57
c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	58 # define NS_IN6ADDRSZ 16
c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	59 # define NS_INT16SZ 2
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	60
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	61 /*
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	62 * WARNING: Don't even consider trying to compile this on a system where
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	63 * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	64 */
13787 f4b0b520e409 prefer (X ? 1 : -1) when converting from boolean (1,0) to int (1,-1) Paul Eggert <eggert@cs.ucla.edu> parents: 12559 diff changeset	65 typedef int verify_int_size[4 <= sizeof (int) ? 1 : -1];
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	66
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	67 static const char inet_ntop4 (const unsigned char src, char *dst, socklen_t size);
15633 c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	68 # if HAVE_IPV6
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	69 static const char inet_ntop6 (const unsigned char src, char *dst, socklen_t size);
15633 c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	70 # endif
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	71
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	72
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	73 /* char *
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	74 * inet_ntop(af, src, dst, size)
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	75 * convert a network format address to presentation format.
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	76 * return:
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	77 * pointer to presentation format address (`dst'), or NULL (see errno).
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	78 * author:
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	79 * Paul Vixie, 1996.
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	80 */
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	81 const char *
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	82 inet_ntop (int af, const void *restrict src,
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	83 char *restrict dst, socklen_t cnt)
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	84 {
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	85 switch (af)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	86 {
15633 c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	87 # if HAVE_IPV4
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	88 case AF_INET:
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	89 return (inet_ntop4 (src, dst, cnt));
15633 c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	90 # endif
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	91
15633 c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	92 # if HAVE_IPV6
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	93 case AF_INET6:
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	94 return (inet_ntop6 (src, dst, cnt));
15633 c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	95 # endif
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	96
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	97 default:
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	98 errno = EAFNOSUPPORT;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	99 return (NULL);
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	100 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	101 /* NOTREACHED */
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	102 }
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	103
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	104 /* const char *
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	105 * inet_ntop4(src, dst, size)
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	106 * format an IPv4 address
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	107 * return:
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	108 * `dst' (as a const)
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	109 * notes:
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	110 * (1) uses no statics
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	111 * (2) takes a u_char* not an in_addr as input
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	112 * author:
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	113 * Paul Vixie, 1996.
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	114 */
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	115 static const char *
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	116 inet_ntop4 (const unsigned char src, char dst, socklen_t size)
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	117 {
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	118 char tmp[sizeof "255.255.255.255"];
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	119 int len;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	120
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	121 len = sprintf (tmp, "%u.%u.%u.%u", src[0], src[1], src[2], src[3]);
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	122 if (len < 0)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	123 return NULL;
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	124
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	125 if (len > size)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	126 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	127 errno = ENOSPC;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	128 return NULL;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	129 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	130
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	131 return strcpy (dst, tmp);
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	132 }
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	133
15633 c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	134 # if HAVE_IPV6
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	135
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	136 /* const char *
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	137 * inet_ntop6(src, dst, size)
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	138 * convert IPv6 binary address into presentation (printable) format
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	139 * author:
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	140 * Paul Vixie, 1996.
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	141 */
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	142 static const char *
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	143 inet_ntop6 (const unsigned char src, char dst, socklen_t size)
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	144 {
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	145 /*
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	146 * Note that int32_t and int16_t need only be "at least" large enough
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	147 * to contain a value of the specified size. On some systems, like
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	148 * Crays, there is no such thing as an integer variable with 16 bits.
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	149 * Keep this in mind if you think this function should have been coded
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	150 * to use pointer overlays. All the world's not a VAX.
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	151 */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	152 char tmp[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"], *tp;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	153 struct
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	154 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	155 int base, len;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	156 } best, cur;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	157 unsigned int words[NS_IN6ADDRSZ / NS_INT16SZ];
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	158 int i;
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	159
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	160 /*
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	161 * Preprocess:
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	162 * Copy the input (bytewise) array into a wordwise array.
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	163 * Find the longest run of 0x00's in src[] for :: shorthanding.
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	164 */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	165 memset (words, '\0', sizeof words);
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	166 for (i = 0; i < NS_IN6ADDRSZ; i += 2)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	167 words[i / 2] = (src[i] << 8) \| src[i + 1];
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	168 best.base = -1;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	169 cur.base = -1;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	170 for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	171 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	172 if (words[i] == 0)
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	173 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	174 if (cur.base == -1)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	175 cur.base = i, cur.len = 1;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	176 else
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	177 cur.len++;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	178 }
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	179 else
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	180 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	181 if (cur.base != -1)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	182 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	183 if (best.base == -1 \|\| cur.len > best.len)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	184 best = cur;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	185 cur.base = -1;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	186 }
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	187 }
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	188 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	189 if (cur.base != -1)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	190 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	191 if (best.base == -1 \|\| cur.len > best.len)
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	192 best = cur;
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	193 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	194 if (best.base != -1 && best.len < 2)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	195 best.base = -1;
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	196
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	197 /*
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	198 * Format the result.
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	199 */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	200 tp = tmp;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	201 for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	202 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	203 /* Are we inside the best run of 0x00's? */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	204 if (best.base != -1 && i >= best.base && i < (best.base + best.len))
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	205 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	206 if (i == best.base)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	207 *tp++ = ':';
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	208 continue;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	209 }
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	210 /* Are we following an initial run of 0x00s or any real hex? */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	211 if (i != 0)
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	212 *tp++ = ':';
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	213 /* Is this address an encapsulated IPv4? */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	214 if (i == 6 && best.base == 0 &&
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	215 (best.len == 6 \|\| (best.len == 5 && words[5] == 0xffff)))
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	216 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	217 if (!inet_ntop4 (src + 12, tp, sizeof tmp - (tp - tmp)))
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	218 return (NULL);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	219 tp += strlen (tp);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	220 break;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	221 }
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	222 {
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	223 int len = sprintf (tp, "%x", words[i]);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	224 if (len < 0)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	225 return NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11941 diff changeset	226 tp += len;
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	227 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	228 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	229 /* Was it a trailing run of 0x00's? */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	230 if (best.base != -1 && (best.base + best.len) ==
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	231 (NS_IN6ADDRSZ / NS_INT16SZ))
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	232 *tp++ = ':';
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	233 *tp++ = '\0';
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	234
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	235 /*
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	236 * Check for overflow, copy, and we're done.
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	237 */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	238 if ((socklen_t) (tp - tmp) > size)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	239 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	240 errno = ENOSPC;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	241 return NULL;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	242 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	243
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	244 return strcpy (dst, tmp);
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	245 }
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	246
15633 c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	247 # endif
c2c292001fc0 inet_ntop: Support for MSVC on Windows Vista or newer. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	248
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	249 #endif

Mercurial > hg > octave-shane > gnulib-hg

annotate lib/inet_ntop.c @ 15633:c2c292001fc0