/* $KAME: inet_addr.c,v 1.5 2001/08/20 02:32:40 itojun Exp $ */ /* * ++Copyright++ 1983, 1990, 1993 * - * Copyright (c) 1983, 1990, 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 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. * - * Portions Copyright (c) 1993 by Digital Equipment Corporation. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies, and that * the name of Digital Equipment Corporation not be used in advertising or * publicity pertaining to distribution of the document or software without * specific, written prior permission. * * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS * SOFTWARE. * - * --Copyright-- */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93"; #endif /* LIBC_SCCS and not lint */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: src/lib/libc/net/inet_addr.c,v 1.16 2002/04/19 04:46:20 suz Exp $"); #include "xlocale_private.h" #include <sys/param.h> #include <netinet/in.h> #include <arpa/inet.h> #include <ctype.h> #include <errno.h> #include <string.h> #include <stdlib.h> /* * ASCII internet address interpretation routine. * The value returned is in network order. */ in_addr_t /* XXX should be struct in_addr :( */ inet_addr(cp) const char *cp; { struct in_addr val; if (inet_aton(cp, &val)) return (val.s_addr); return (INADDR_NONE); } /* * Check whether "cp" is a valid ASCII representation * of an Internet address and convert to a binary address. * Returns 1 if the address is valid, 0 if not. * This replaces inet_addr, the return value from which * cannot distinguish between failure and a local broadcast address. */ int inet_aton(cp, addr) const char *cp; struct in_addr *addr; { u_long parts[4]; in_addr_t val; char *c; char *endptr; int gotend, n; locale_t loc = __current_locale(); c = (char *)cp; n = 0; /* * Run through the string, grabbing numbers until * the end of the string, or some error */ gotend = 0; while (!gotend) { errno = 0; val = strtoul_l(c, &endptr, 0, loc); if (errno == ERANGE) /* Fail completely if it overflowed. */ return (0); /* * If the whole string is invalid, endptr will equal * c.. this way we can make sure someone hasn't * gone '.12' or something which would get past * the next check. */ if (endptr == c) return (0); parts[n] = val; c = endptr; /* Check the next character past the previous number's end */ switch (*c) { case '.' : /* Make sure we only do 3 dots .. */ if (n == 3) /* Whoops. Quit. */ return (0); n++; c++; break; case '\0': gotend = 1; break; default: if (isspace_l((unsigned char)*c, loc)) { gotend = 1; break; } else return (0); /* Invalid character, so fail */ } } /* * Concoct the address according to * the number of parts specified. */ switch (n) { case 0: /* a -- 32 bits */ /* * Nothing is necessary here. Overflow checking was * already done in strtoul(). */ break; case 1: /* a.b -- 8.24 bits */ if (val > 0xffffff || parts[0] > 0xff) return (0); val |= parts[0] << 24; break; case 2: /* a.b.c -- 8.8.16 bits */ if (val > 0xffff || parts[0] > 0xff || parts[1] > 0xff) return (0); val |= (parts[0] << 24) | (parts[1] << 16); break; case 3: /* a.b.c.d -- 8.8.8.8 bits */ if (val > 0xff || parts[0] > 0xff || parts[1] > 0xff || parts[2] > 0xff) return (0); val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); break; } if (addr != NULL) addr->s_addr = htonl(val); return (1); } /* * Weak aliases for applications that use certain private entry points, * and fail to include <arpa/inet.h>. */ #undef inet_addr __weak_reference(__inet_addr, inet_addr); #undef inet_aton __weak_reference(__inet_aton, inet_aton);