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glibc/inet/inet_net.c
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/* | |
* 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. | |
* 4. 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. | |
*/ | |
/* Copyright (C) 2013-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#if defined(LIBC_SCCS) && !defined(lint) | |
static char sccsid[] = "@(#)inet_network.c 8.1 (Berkeley) 6/4/93"; | |
#endif /* LIBC_SCCS and not lint */ | |
#include <sys/types.h> | |
#include <netinet/in.h> | |
#include <arpa/inet.h> | |
#include <ctype.h> | |
/* | |
* Internet network address interpretation routine. | |
* The library routines call this routine to interpret | |
* network numbers. | |
*/ | |
u_int32_t | |
inet_network (const char *cp) | |
{ | |
u_int32_t val, base, n, i; | |
char c; | |
u_int32_t parts[4], *pp = parts; | |
int digit; | |
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) + (tolower (c) + 10 - '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; | |
} | |
while (isspace(*cp)) | |
cp++; | |
if (*cp) | |
return (INADDR_NONE); | |
if (pp >= parts + 4 || val > 0xff) | |
return (INADDR_NONE); | |
*pp++ = val; | |
n = pp - parts; | |
for (val = 0, i = 0; i < n; i++) { | |
val <<= 8; | |
val |= parts[i] & 0xff; | |
} | |
return (val); | |
} |