| /* |
| * 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. |
| */ |
| |
| #include <sys/types.h> |
| #include <sys/param.h> |
| |
| #include <netinet/in.h> |
| #include <arpa/inet.h> |
| |
| #include <ctype.h> |
| |
| #include <endian.h> |
| #include <stdint.h> |
| #include <stdlib.h> |
| #include <limits.h> |
| #include <errno.h> |
| |
| /* |
| * 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); |
| } |
| weak_alias (__inet_addr, inet_addr) |
| |
| /* |
| * 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) |
| { |
| static const in_addr_t max[4] = { 0xffffffff, 0xffffff, 0xffff, 0xff }; |
| in_addr_t val; |
| char c; |
| union iaddr { |
| uint8_t bytes[4]; |
| uint32_t word; |
| } res; |
| uint8_t *pp = res.bytes; |
| int digit; |
| |
| int saved_errno = errno; |
| __set_errno (0); |
| |
| 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; |
| { |
| 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; |
| 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); |
| |
| __set_errno (saved_errno); |
| return (1); |
| |
| ret_0: |
| __set_errno (saved_errno); |
| return (0); |
| } |
| weak_alias (__inet_aton, inet_aton) |
| libc_hidden_def (__inet_aton) |
| libc_hidden_weak (inet_aton) |