octave-nkf/gnulib-hg: lib/inet

annotate lib/inet_ntop.c @ 6841:b2c0fe3ad032

Revert slightly, from Bruno.

author	Simon Josefsson <simon@josefsson.org>
date	Mon, 19 Jun 2006 12:28:18 +0000
parents	5eb20b30a115
children	8a1a9361108c

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
6838 5eb20b30a115 2006-06-19 Simon Josefsson <jas@extundo.com> Simon Josefsson <simon@josefsson.org> parents: 6435 diff changeset	2 Copyright (c) 2005, 2006 Free Software Foundation, Inc.
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	3
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	4 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	5 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	6 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	7 any later version.
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	8
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	9 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	10 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	11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	12 GNU General Public License for more details.
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	13
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	14 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	15 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	16 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	17
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	18 /*
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	19 * Copyright (c) 1996-1999 by Internet Software Consortium.
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	20 *
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	21 * Permission to use, copy, modify, and distribute this software for any
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	22 * 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	23 * copyright notice and this permission notice appear in all copies.
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	24 *
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	25 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	26 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	27 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	28 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	29 * 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	30 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	31 * 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	32 * SOFTWARE.
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	33 */
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	34
6259 96c32553b4c6 Use a consistent style for including <config.h>. Paul Eggert <eggert@cs.ucla.edu> parents: 5825 diff changeset	35 #ifdef HAVE_CONFIG_H
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	36 # include <config.h>
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	37 #endif
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	38
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	39 /* Specification. */
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	40 #include "inet_ntop.h"
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	41
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	42 #include <stdio.h>
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	43 #include <string.h>
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	44 #include <errno.h>
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	45
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	46 #ifndef EAFNOSUPPORT
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	47 # define EAFNOSUPPORT EINVAL
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	48 #endif
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	49
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	50 #define NS_IN6ADDRSZ 16
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	51 #define NS_INT16SZ 2
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	52
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	53 /*
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	54 * 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	55 * 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	56 */
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	57 typedef int verify_int_size[2 * sizeof (int) - 7];
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	58
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	59 static const char inet_ntop4 (const unsigned char src, char *dst, socklen_t size);
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	60 #if HAVE_IPV6
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	61 static const char inet_ntop6 (const unsigned char src, char *dst, socklen_t size);
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	62 #endif
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	63
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	64
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	65 /* char *
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	66 * inet_ntop(af, src, dst, size)
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	67 * convert a network format address to presentation format.
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	68 * return:
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	69 * pointer to presentation format address (`dst'), or NULL (see errno).
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	70 * author:
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	71 * Paul Vixie, 1996.
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 const char *
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	74 inet_ntop (int af, const void *restrict src,
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	75 char *restrict dst, socklen_t cnt)
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	76 {
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	77 switch (af)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	78 {
6841 b2c0fe3ad032 Revert slightly, from Bruno. Simon Josefsson <simon@josefsson.org> parents: 6838 diff changeset	79 #if HAVE_IPV4
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	80 case AF_INET:
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	81 return (inet_ntop4 (src, dst, cnt));
6841 b2c0fe3ad032 Revert slightly, from Bruno. Simon Josefsson <simon@josefsson.org> parents: 6838 diff changeset	82 #endif
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	83
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	84 #if HAVE_IPV6
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	85 case AF_INET6:
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	86 return (inet_ntop6 (src, dst, cnt));
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	87 #endif
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	88
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	89 default:
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	90 errno = EAFNOSUPPORT;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	91 return (NULL);
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	92 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	93 /* NOTREACHED */
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	94 }
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	95
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	96 /* const char *
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	97 * inet_ntop4(src, dst, size)
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	98 * format an IPv4 address
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	99 * return:
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	100 * `dst' (as a const)
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	101 * notes:
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	102 * (1) uses no statics
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	103 * (2) takes a u_char* not an in_addr as input
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	104 * author:
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	105 * Paul Vixie, 1996.
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	106 */
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	107 static const char *
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	108 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	109 {
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	110 char tmp[sizeof "255.255.255.255"];
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	111 int len;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	112
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	113 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	114 if (len < 0)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	115 return NULL;
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	116
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	117 if (len > size)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	118 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	119 errno = ENOSPC;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	120 return NULL;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	121 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	122
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	123 return strcpy (dst, tmp);
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	124 }
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	125
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	126 #if HAVE_IPV6
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	127
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	128 /* const char *
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	129 * inet_ntop6(src, dst, size)
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	130 * convert IPv6 binary address into presentation (printable) format
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	131 * author:
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	132 * Paul Vixie, 1996.
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	133 */
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	134 static const char *
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	135 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	136 {
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	137 /*
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	138 * 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	139 * 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	140 * 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	141 * 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	142 * 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	143 */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	144 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	145 struct
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	146 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	147 int base, len;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	148 } best, cur;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	149 unsigned int words[NS_IN6ADDRSZ / NS_INT16SZ];
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	150 int i;
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	151
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	152 /*
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	153 * Preprocess:
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	154 * Copy the input (bytewise) array into a wordwise array.
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	155 * 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	156 */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	157 memset (words, '\0', sizeof words);
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	158 for (i = 0; i < NS_IN6ADDRSZ; i += 2)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	159 words[i / 2] = (src[i] << 8) \| src[i + 1];
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	160 best.base = -1;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	161 cur.base = -1;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	162 for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	163 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	164 if (words[i] == 0)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	165 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	166 if (cur.base == -1)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	167 cur.base = i, cur.len = 1;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	168 else
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	169 cur.len++;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	170 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	171 else
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	172 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	173 if (cur.base != -1)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	174 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	175 if (best.base == -1 \|\| cur.len > best.len)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	176 best = cur;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	177 cur.base = -1;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	178 }
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	179 }
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	180 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	181 if (cur.base != -1)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	182 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	183 if (best.base == -1 \|\| cur.len > best.len)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	184 best = cur;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	185 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	186 if (best.base != -1 && best.len < 2)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	187 best.base = -1;
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	188
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	189 /*
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	190 * Format the result.
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	191 */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	192 tp = tmp;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	193 for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	194 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	195 /* Are we inside the best run of 0x00's? */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	196 if (best.base != -1 && i >= best.base && i < (best.base + best.len))
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 if (i == best.base)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	199 *tp++ = ':';
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	200 continue;
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	201 }
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	202 /* 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	203 if (i != 0)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	204 *tp++ = ':';
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	205 /* Is this address an encapsulated IPv4? */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	206 if (i == 6 && best.base == 0 &&
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	207 (best.len == 6 \|\| (best.len == 5 && words[5] == 0xffff)))
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	208 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	209 if (!inet_ntop4 (src + 12, tp, sizeof tmp - (tp - tmp)))
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	210 return (NULL);
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	211 tp += strlen (tp);
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	212 break;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	213 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	214 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	215 int len = sprintf (tp, "%x", words[i]);
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	216 if (len < 0)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	217 return NULL;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	218 tp += len;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	219 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	220 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	221 /* Was it a trailing run of 0x00's? */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	222 if (best.base != -1 && (best.base + best.len) ==
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	223 (NS_IN6ADDRSZ / NS_INT16SZ))
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	224 *tp++ = ':';
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	225 *tp++ = '\0';
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	226
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 * Check for overflow, copy, and we're done.
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	229 */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	230 if ((socklen_t) (tp - tmp) > size)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	231 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	232 errno = ENOSPC;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	233 return NULL;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	234 }
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 return strcpy (dst, tmp);
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	237 }
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	238
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	239 #endif

Mercurial > hg > octave-nkf > gnulib-hg

annotate lib/inet_ntop.c @ 6841:b2c0fe3ad032