7daefc5a5a
If an argument of a ctype function is outside "unsigned char" and if it is not EOF, the behavior is undefined. The isascii(3) is the sole exception of above and it was used to be used to check a value was valid for other ctype functions in ancient systems. On modern systems, the ctype functions take all values of "unsigned char", and this check is obsolete and even wrong for non-ASCII systems. However, we leave the isascii() untouched for now, so as not to change the current behavior.
117 lines
3.4 KiB
C
117 lines
3.4 KiB
C
/* $NetBSD: inet_network.c,v 1.13 2000/07/07 08:03:39 itohy 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. 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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#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 1.13 2000/07/07 08:03:39 itohy 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 __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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u_long
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inet_network(cp)
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register const char *cp;
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{
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u_long val, base;
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size_t i, n;
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u_char c;
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u_long parts[4], *pp = parts;
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int digit;
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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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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 (*cp == '.') {
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if (pp >= parts + 4 || val > 0xff)
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return (INADDR_NONE);
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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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