/* * 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. * 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. */ /* * Portions Copyright (c) 1996-1999 by Internet Software Consortium. * * 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. * * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE * CONSORTIUM 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. */ #if defined(LIBC_SCCS) && !defined(lint) static const char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93"; static const char rcsid[] = "$BINDId: inet_addr.c,v 8.11 1999/10/13 16:39:25 vixie Exp $"; #endif /* LIBC_SCCS and not lint */ #include <sys/types.h> #include <sys/param.h> #include <netinet/in.h> #include <arpa/inet.h> #include <ctype.h> #ifdef _LIBC # include <endian.h> # include <stdint.h> # include <stdlib.h> # include <limits.h> # include <errno.h> #endif /* * Ascii internet address interpretation routine. * The value returned is in network order. */ in_addr_t inet_addr(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. */ in_addr_t __inet_aton(const char *cp, struct in_addr *addr) { static const in_addr_t max[4] = { 0xffffffff, 0xffffff, 0xffff, 0xff }; in_addr_t val; #ifndef _LIBC int base; #endif char c; union iaddr { uint8_t bytes[4]; uint32_t word; } res; uint8_t *pp = res.bytes; int digit; #ifdef _LIBC int saved_errno = errno; __set_errno (0); #endif res.word = 0; c = *cp; for (;;) { /* * Collect number up to ``.''. * Values are specified as for C: * 0x=hex, 0=octal, isdigit=decimal. */ if (!isdigit(c)) goto ret_0; #ifdef _LIBC { char *endp; unsigned long ul = strtoul (cp, (char **) &endp, 0); if (ul == ULONG_MAX && errno == ERANGE) goto ret_0; if (ul > 0xfffffffful) goto ret_0; val = ul; digit = cp != endp; cp = endp; } c = *cp; #else val = 0; base = 10; digit = 0; if (c == '0') { c = *++cp; if (c == 'x' || c == 'X') base = 16, c = *++cp; else { base = 8; digit = 1 ; } } for (;;) { if (isascii(c) && isdigit(c)) { if (base == 8 && (c == '8' || c == '9')) return (0); val = (val * base) + (c - '0'); c = *++cp; digit = 1; } else if (base == 16 && isascii(c) && isxdigit(c)) { val = (val << 4) | (c + 10 - (islower(c) ? 'a' : 'A')); c = *++cp; digit = 1; } else break; } #endif if (c == '.') { /* * Internet format: * a.b.c.d * a.b.c (with c treated as 16 bits) * a.b (with b treated as 24 bits) */ if (pp > res.bytes + 2 || val > 0xff) goto ret_0; *pp++ = val; c = *++cp; } else break; } /* * Check for trailing characters. */ if (c != '\0' && (!isascii(c) || !isspace(c))) goto ret_0; /* * Did we get a valid digit? */ if (!digit) goto ret_0; /* Check whether the last part is in its limits depending on the number of parts in total. */ if (val > max[pp - res.bytes]) goto ret_0; if (addr != NULL) addr->s_addr = res.word | htonl (val); #ifdef _LIBC __set_errno (saved_errno); #endif return (1); ret_0: #ifdef _LIBC __set_errno (saved_errno); #endif return (0); } weak_alias (__inet_aton, inet_aton) libc_hidden_def (__inet_aton) libc_hidden_weak (inet_aton)