minix/lib/libc/inet/inet_network.c

115 lines
3.3 KiB
C
Raw Normal View History

/* $NetBSD: inet_network.c,v 1.4 2008/01/20 04:56:08 christos Exp $ */
/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)inet_network.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: inet_network.c,v 1.4 2008/01/20 04:56:08 christos Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <assert.h>
#include <ctype.h>
#ifdef _DIAGNOSTIC
#include <stddef.h> /* for NULL */
#endif
#ifdef __weak_alias
__weak_alias(inet_network,_inet_network)
#endif
/*
* Internet network address interpretation routine.
* The library routines call this routine to interpret
* network numbers.
*/
in_addr_t
inet_network(const char *cp)
{
in_addr_t val;
size_t i, n;
u_char c;
in_addr_t parts[4], *pp = parts;
int digit, base;
_DIAGASSERT(cp != NULL);
again:
val = 0; base = 10; digit = 0;
if (*cp == '0')
digit = 1, base = 8, cp++;
if (*cp == 'x' || *cp == 'X')
digit = 0, base = 16, cp++;
while ((c = *cp) != 0) {
if (isdigit(c)) {
if (base == 8 && (c == '8' || c == '9'))
return (INADDR_NONE);
val = (val * base) + (c - '0');
cp++;
digit = 1;
continue;
}
if (base == 16 && isxdigit(c)) {
val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A'));
cp++;
digit = 1;
continue;
}
break;
}
if (!digit)
return (INADDR_NONE);
if (pp >= parts + 4 || val > 0xff)
return (INADDR_NONE);
if (*cp == '.') {
*pp++ = val, cp++;
goto again;
}
if (*cp && !isspace((u_char) *cp))
return (INADDR_NONE);
*pp++ = val;
n = pp - parts;
if (n > 4)
return (INADDR_NONE);
for (val = 0, i = 0; i < n; i++) {
val <<= 8;
val |= parts[i] & 0xff;
}
return (val);
}