/* * ++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"; static char rcsid[] = "$Id$"; #endif /* LIBC_SCCS and not lint */ #include #include #include #include #include #ifdef _LIBC # include # include # include #endif #include "../conf/portability.h" /* these are compatibility routines, not needed on recent BSD releases */ /* * Ascii internet address interpretation routine. * The value returned is in network order. */ u_int32_t inet_addr(cp) register 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; { register u_int32_t val; /* changed from u_long --david */ #ifndef _LIBC register int base; #endif register int n; register char c; u_int32_t parts[4]; register u_int32_t *pp = parts; #ifdef _LIBC int saved_errno = errno; __set_errno (0); #endif 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 { unsigned long ul = strtoul (cp, (char **) &cp, 0); if (ul == ULONG_MAX && errno == ERANGE) goto ret_0; if (ul > 0xfffffffful) goto ret_0; val = ul; } c = *cp; #else base = 10; if (c == '0') { c = *++cp; if (c == 'x' || c == 'X') base = 16, c = *++cp; else base = 8; } val = 0; 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; } #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 >= parts + 3) goto ret_0; *pp++ = val; c = *++cp; } else break; } /* * Check for trailing characters. */ if (c != '\0' && (!isascii(c) || !isspace(c))) goto ret_0; /* * Concoct the address according to * the number of parts specified. */ n = pp - parts + 1; switch (n) { case 0: goto ret_0; /* initial nondigit */ case 1: /* a -- 32 bits */ break; case 2: /* a.b -- 8.24 bits */ if (val > 0xffffff) goto ret_0; val |= parts[0] << 24; break; case 3: /* a.b.c -- 8.8.16 bits */ if (val > 0xffff) goto ret_0; val |= (parts[0] << 24) | (parts[1] << 16); break; case 4: /* a.b.c.d -- 8.8.8.8 bits */ if (val > 0xff) goto ret_0; val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); break; } if (addr) addr->s_addr = htonl(val); #ifdef _LIBC __set_errno (saved_errno); #endif return (1); ret_0: #ifdef _LIBC __set_errno (saved_errno); #endif return (0); }