| /* $OpenBSD: inet_addr.c,v 1.6 1999/05/03 22:31:14 yanick Exp $ */ |
| |
| /* |
| * 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-- |
| */ |
| |
| #include "includes.h" |
| |
| #if !defined(HAVE_INET_ATON) |
| |
| #if defined(LIBC_SCCS) && !defined(lint) |
| #if 0 |
| static char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93"; |
| static char rcsid[] = "$From: inet_addr.c,v 8.5 1996/08/05 08:31:35 vixie Exp $"; |
| #else |
| static char rcsid[] = "$OpenBSD: inet_addr.c,v 1.6 1999/05/03 22:31:14 yanick Exp $"; |
| #endif |
| #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> |
| |
| #if 0 |
| /* |
| * Ascii internet address interpretation routine. |
| * The value returned is in network order. |
| */ |
| in_addr_t |
| inet_addr(cp) |
| register const char *cp; |
| { |
| struct in_addr val; |
| |
| if (inet_aton(cp, &val)) |
| return (val.s_addr); |
| return (INADDR_NONE); |
| } |
| #endif |
| |
| /* |
| * 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(const char *cp, struct in_addr *addr) |
| { |
| register u_int32_t val; |
| register int base, n; |
| register char c; |
| unsigned int parts[4]; |
| register unsigned int *pp = parts; |
| |
| c = *cp; |
| for (;;) { |
| /* |
| * Collect number up to ``.''. |
| * Values are specified as for C: |
| * 0x=hex, 0=octal, isdigit=decimal. |
| */ |
| if (!isdigit(c)) |
| return (0); |
| val = 0; base = 10; |
| if (c == '0') { |
| c = *++cp; |
| if (c == 'x' || c == 'X') |
| base = 16, c = *++cp; |
| else |
| base = 8; |
| } |
| for (;;) { |
| if (isascii(c) && isdigit(c)) { |
| val = (val * base) + (c - '0'); |
| c = *++cp; |
| } else if (base == 16 && isascii(c) && isxdigit(c)) { |
| val = (val << 4) | |
| (c + 10 - (islower(c) ? 'a' : 'A')); |
| c = *++cp; |
| } else |
| break; |
| } |
| 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 >= parts + 3) |
| return (0); |
| *pp++ = val; |
| c = *++cp; |
| } else |
| break; |
| } |
| /* |
| * Check for trailing characters. |
| */ |
| if (c != '\0' && (!isascii(c) || !isspace(c))) |
| return (0); |
| /* |
| * Concoct the address according to |
| * the number of parts specified. |
| */ |
| n = pp - parts + 1; |
| switch (n) { |
| |
| case 0: |
| return (0); /* initial nondigit */ |
| |
| case 1: /* a -- 32 bits */ |
| break; |
| |
| case 2: /* a.b -- 8.24 bits */ |
| if ((val > 0xffffff) || (parts[0] > 0xff)) |
| return (0); |
| val |= parts[0] << 24; |
| break; |
| |
| case 3: /* 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 4: /* 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) |
| addr->s_addr = htonl(val); |
| return (1); |
| } |
| |
| #endif /* !defined(HAVE_INET_ATON) */ |