gnulib: lib/inet_ntop.c annotate

annotate lib/inet_ntop.c @ 9993:4d5ba95a0dec

Move inet_ntop and inet_pton declarations to arpa/inet.h.

author	Simon Josefsson <simon@josefsson.org>
date	Mon, 28 Apr 2008 17:40:25 +0200
parents	8a1a9361108c
children	909daff94315

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
9993 4d5ba95a0dec Move inet_ntop and inet_pton declarations to arpa/inet.h. Simon Josefsson <simon@josefsson.org> parents: 7302 diff changeset	3 Copyright (C) 2005, 2006, 2008 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
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	41 #include <stdio.h>
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	42 #include <string.h>
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	43 #include <errno.h>
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	44
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	45 #ifndef EAFNOSUPPORT
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	46 # define EAFNOSUPPORT EINVAL
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	47 #endif
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	48
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	49 #define NS_IN6ADDRSZ 16
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	50 #define NS_INT16SZ 2
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	51
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 * 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	54 * 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	55 */
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	56 typedef int verify_int_size[2 * sizeof (int) - 7];
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	57
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	58 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	59 #if HAVE_IPV6
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	60 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	61 #endif
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	62
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 /* char *
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	65 * inet_ntop(af, src, dst, size)
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	66 * convert a network format address to presentation format.
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	67 * return:
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	68 * pointer to presentation format address (`dst'), or NULL (see errno).
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	69 * author:
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	70 * Paul Vixie, 1996.
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 const char *
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	73 inet_ntop (int af, const void *restrict src,
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	74 char *restrict dst, socklen_t cnt)
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	75 {
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	76 switch (af)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	77 {
6841 b2c0fe3ad032 Revert slightly, from Bruno. Simon Josefsson <simon@josefsson.org> parents: 6838 diff changeset	78 #if HAVE_IPV4
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	79 case AF_INET:
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	80 return (inet_ntop4 (src, dst, cnt));
6841 b2c0fe3ad032 Revert slightly, from Bruno. Simon Josefsson <simon@josefsson.org> parents: 6838 diff changeset	81 #endif
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	82
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	83 #if HAVE_IPV6
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	84 case AF_INET6:
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	85 return (inet_ntop6 (src, dst, cnt));
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	86 #endif
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	87
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	88 default:
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	89 errno = EAFNOSUPPORT;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	90 return (NULL);
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	91 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	92 /* NOTREACHED */
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	93 }
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 /* const char *
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	96 * inet_ntop4(src, dst, size)
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	97 * format an IPv4 address
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	98 * return:
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	99 * `dst' (as a const)
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	100 * notes:
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	101 * (1) uses no statics
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	102 * (2) takes a u_char* not an in_addr as input
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	103 * author:
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	104 * Paul Vixie, 1996.
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	105 */
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	106 static const char *
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	107 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	108 {
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	109 char tmp[sizeof "255.255.255.255"];
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	110 int len;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	111
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	112 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	113 if (len < 0)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	114 return NULL;
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	115
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	116 if (len > size)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	117 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	118 errno = ENOSPC;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	119 return NULL;
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
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	122 return strcpy (dst, tmp);
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	123 }
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 #if HAVE_IPV6
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	126
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	127 /* const char *
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	128 * inet_ntop6(src, dst, size)
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	129 * convert IPv6 binary address into presentation (printable) format
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	130 * author:
96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	131 * Paul Vixie, 1996.
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 static const char *
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	134 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	135 {
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	136 /*
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	137 * 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	138 * 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	139 * 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	140 * 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	141 * 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	142 */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	143 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	144 struct
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 int base, len;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	147 } best, cur;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	148 unsigned int words[NS_IN6ADDRSZ / NS_INT16SZ];
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	149 int i;
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	150
6435 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 * Preprocess:
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	153 * Copy the input (bytewise) array into a wordwise array.
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	154 * 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	155 */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	156 memset (words, '\0', sizeof words);
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	157 for (i = 0; i < NS_IN6ADDRSZ; i += 2)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	158 words[i / 2] = (src[i] << 8) \| src[i + 1];
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	159 best.base = -1;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	160 cur.base = -1;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	161 for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	162 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	163 if (words[i] == 0)
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 if (cur.base == -1)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	166 cur.base = i, cur.len = 1;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	167 else
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	168 cur.len++;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	169 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	170 else
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 (cur.base != -1)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	173 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	174 if (best.base == -1 \|\| cur.len > best.len)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	175 best = cur;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	176 cur.base = -1;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	177 }
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	178 }
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	179 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	180 if (cur.base != -1)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	181 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	182 if (best.base == -1 \|\| cur.len > best.len)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	183 best = cur;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	184 }
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	185 if (best.base != -1 && best.len < 2)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	186 best.base = -1;
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: 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 * Format the result.
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 tp = tmp;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	192 for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++)
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 /* Are we inside the best run of 0x00's? */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	195 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	196 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	197 if (i == best.base)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	198 *tp++ = ':';
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	199 continue;
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	200 }
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	201 /* 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	202 if (i != 0)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	203 *tp++ = ':';
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	204 /* Is this address an encapsulated IPv4? */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	205 if (i == 6 && best.base == 0 &&
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	206 (best.len == 6 \|\| (best.len == 5 && words[5] == 0xffff)))
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	207 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	208 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	209 return (NULL);
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	210 tp += strlen (tp);
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	211 break;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	212 }
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 int len = sprintf (tp, "%x", words[i]);
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	215 if (len < 0)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	216 return NULL;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	217 tp += len;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	218 }
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 /* Was it a trailing run of 0x00's? */
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	221 if (best.base != -1 && (best.base + best.len) ==
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	222 (NS_IN6ADDRSZ / NS_INT16SZ))
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	223 *tp++ = ':';
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	224 *tp++ = '\0';
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	225
6435 be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	226 /*
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	227 * Check for overflow, copy, and we're done.
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 if ((socklen_t) (tp - tmp) > size)
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	230 {
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	231 errno = ENOSPC;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	232 return NULL;
be00741570b7 Fix inet_ntop on mingw32. Simon Josefsson <simon@josefsson.org> parents: 6259 diff changeset	233 }
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 return strcpy (dst, tmp);
5825 96441be32be1 New module 'inet_ntop'. Bruno Haible <bruno@clisp.org> parents: diff changeset	236 }
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 #endif

Mercurial > gnulib

annotate lib/inet_ntop.c @ 9993:4d5ba95a0dec