115 lines
3.3 KiB
C
115 lines
3.3 KiB
C
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/* $NetBSD: inet_network.c,v 1.4 2008/01/20 04:56:08 christos Exp $ */
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/*
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* Copyright (c) 1983, 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. 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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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)inet_network.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: inet_network.c,v 1.4 2008/01/20 04:56:08 christos Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <assert.h>
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#include <ctype.h>
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#ifdef _DIAGNOSTIC
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#include <stddef.h> /* for NULL */
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#endif
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#ifdef __weak_alias
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__weak_alias(inet_network,_inet_network)
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#endif
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/*
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* Internet network address interpretation routine.
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* The library routines call this routine to interpret
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* network numbers.
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*/
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in_addr_t
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inet_network(const char *cp)
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{
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in_addr_t val;
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size_t i, n;
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u_char c;
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in_addr_t parts[4], *pp = parts;
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int digit, base;
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_DIAGASSERT(cp != NULL);
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again:
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val = 0; base = 10; digit = 0;
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if (*cp == '0')
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digit = 1, base = 8, cp++;
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if (*cp == 'x' || *cp == 'X')
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digit = 0, base = 16, cp++;
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while ((c = *cp) != 0) {
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if (isdigit(c)) {
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if (base == 8 && (c == '8' || c == '9'))
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return (INADDR_NONE);
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val = (val * base) + (c - '0');
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cp++;
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digit = 1;
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continue;
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}
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if (base == 16 && isxdigit(c)) {
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val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A'));
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cp++;
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digit = 1;
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continue;
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}
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break;
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}
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if (!digit)
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return (INADDR_NONE);
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if (pp >= parts + 4 || val > 0xff)
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return (INADDR_NONE);
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if (*cp == '.') {
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*pp++ = val, cp++;
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goto again;
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}
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if (*cp && !isspace((u_char) *cp))
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return (INADDR_NONE);
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*pp++ = val;
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n = pp - parts;
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if (n > 4)
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return (INADDR_NONE);
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for (val = 0, i = 0; i < n; i++) {
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val <<= 8;
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val |= parts[i] & 0xff;
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}
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return (val);
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}
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