3311ff84ea
ntp 4.2.8p5 Reviewed by: cy, roberto Relnotes: yes Differential Revision: https://reviews.freebsd.org/D4828
196 lines
6.4 KiB
C
196 lines
6.4 KiB
C
/*
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* Portions Copyright (C) 2004, 2005, 2007, 2008 Internet Systems Consortium, Inc. ("ISC")
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* Portions Copyright (C) 1996-2001 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* Copyright (c) 1983, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Portions Copyright (c) 1993 by Digital Equipment Corporation.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies, and that
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* the name of Digital Equipment Corporation not be used in advertising or
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* publicity pertaining to distribution of the document or software without
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* specific, written prior permission.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
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* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
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* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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/*! \file */
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93";
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static char rcsid[] = "$Id: inet_aton.c,v 1.23 2008/12/01 23:47:45 tbox Exp $";
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#endif /* LIBC_SCCS and not lint */
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#include <config.h>
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#include <ctype.h>
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#include <stddef.h> /* Required for NULL. */
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#include <isc/types.h>
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#include <isc/net.h>
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/*%
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* Check whether "cp" is a valid ascii representation
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* of an Internet address and convert to a binary address.
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* Returns 1 if the address is valid, 0 if not.
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* This replaces inet_addr, the return value from which
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* cannot distinguish between failure and a local broadcast address.
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*/
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int
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isc_net_aton(const char *cp, struct in_addr *addr) {
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unsigned long val;
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int base;
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unsigned char c;
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isc_uint8_t parts[4];
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isc_uint8_t *pp = parts;
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int digit;
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c = *cp;
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for (;;) {
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/*
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* Collect number up to ``.''.
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* Values are specified as for C:
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* 0x=hex, 0=octal, isdigit=decimal.
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*/
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if (!isdigit(c & 0xff))
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return (0);
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val = 0; base = 10; digit = 0;
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if (c == '0') {
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c = *++cp;
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if (c == 'x' || c == 'X')
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base = 16, c = *++cp;
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else {
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base = 8;
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digit = 1;
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}
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}
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for (;;) {
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/*
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* isascii() is valid for all integer values, and
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* when it is true, c is known to be in scope
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* for isdigit(). No cast necessary. Similar
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* comment applies for later ctype uses.
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*/
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if (isascii(c) && isdigit(c)) {
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if (base == 8 && (c == '8' || c == '9'))
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return (0);
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val = (val * base) + (c - '0');
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c = *++cp;
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digit = 1;
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} else if (base == 16 && isascii(c) && isxdigit(c)) {
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val = (val << 4) |
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(c + 10 - (islower(c) ? 'a' : 'A'));
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c = *++cp;
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digit = 1;
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} else
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break;
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}
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if (c == '.') {
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/*
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* Internet format:
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* a.b.c.d
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* a.b.c (with c treated as 16 bits)
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* a.b (with b treated as 24 bits)
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*/
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if (pp >= parts + 3 || val > 0xffU)
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return (0);
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*pp++ = (isc_uint8_t)val;
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c = *++cp;
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} else
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break;
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}
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/*
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* Check for trailing characters.
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*/
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if (c != '\0' && (!isascii(c) || !isspace(c)))
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return (0);
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/*
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* Did we get a valid digit?
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*/
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if (!digit)
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return (0);
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/*
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* Concoct the address according to
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* the number of parts specified.
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*/
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switch (pp - parts + 1) {
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case 1: /* a -- 32 bits */
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break;
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case 2: /* a.b -- 8.24 bits */
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if (val > 0xffffffU)
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return (0);
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val |= parts[0] << 24;
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break;
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case 3: /* a.b.c -- 8.8.16 bits */
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if (val > 0xffffU)
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return (0);
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val |= (parts[0] << 24) | (parts[1] << 16);
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break;
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case 4: /* a.b.c.d -- 8.8.8.8 bits */
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if (val > 0xffU)
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return (0);
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val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
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break;
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}
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if (addr != NULL)
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addr->s_addr = htonl(val);
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return (1);
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}
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