michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /*******************************************************************************
michael@0:  * The following function pr_inet_aton is based on the BSD function inet_aton
michael@0:  * with some modifications. The license and copyright notices applying to this
michael@0:  * function appear below. Modifications are also according to the license below.
michael@0:  ******************************************************************************/
michael@0: 
michael@0: #include "prnetdb.h"
michael@0: 
michael@0: /*
michael@0:  * Copyright (c) 1983, 1990, 1993
michael@0:  *    The Regents of the University of California.  All rights reserved.
michael@0:  * 
michael@0:  * Redistribution and use in source and binary forms, with or without
michael@0:  * modification, are permitted provided that the following conditions
michael@0:  * are met:
michael@0:  * 1. Redistributions of source code must retain the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer.
michael@0:  * 2. Redistributions in binary form must reproduce the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer in the
michael@0:  *    documentation and/or other materials provided with the distribution.
michael@0:  * 4. Neither the name of the University nor the names of its contributors
michael@0:  *    may be used to endorse or promote products derived from this software
michael@0:  *    without specific prior written permission.
michael@0:  * 
michael@0:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
michael@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
michael@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
michael@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
michael@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
michael@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
michael@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
michael@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
michael@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
michael@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
michael@0:  * SUCH DAMAGE.
michael@0:  */
michael@0: 
michael@0: /*
michael@0:  * Portions Copyright (c) 1993 by Digital Equipment Corporation.
michael@0:  * 
michael@0:  * Permission to use, copy, modify, and distribute this software for any
michael@0:  * purpose with or without fee is hereby granted, provided that the above
michael@0:  * copyright notice and this permission notice appear in all copies, and that
michael@0:  * the name of Digital Equipment Corporation not be used in advertising or
michael@0:  * publicity pertaining to distribution of the document or software without
michael@0:  * specific, written prior permission.
michael@0:  * 
michael@0:  * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
michael@0:  * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
michael@0:  * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
michael@0:  * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
michael@0:  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
michael@0:  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
michael@0:  * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
michael@0:  * SOFTWARE.
michael@0:  */
michael@0: 
michael@0: /*
michael@0:  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
michael@0:  * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
michael@0:  *
michael@0:  * Permission to use, copy, modify, and distribute this software for any
michael@0:  * purpose with or without fee is hereby granted, provided that the above
michael@0:  * copyright notice and this permission notice appear in all copies.
michael@0:  *
michael@0:  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
michael@0:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
michael@0:  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
michael@0:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
michael@0:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
michael@0:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
michael@0:  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
michael@0:  */
michael@0: 
michael@0: #define XX 127
michael@0: static const unsigned char index_hex[256] = {
michael@0:     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
michael@0:     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
michael@0:     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
michael@0:      0, 1, 2, 3,  4, 5, 6, 7,  8, 9,XX,XX, XX,XX,XX,XX,
michael@0:     XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX,
michael@0:     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
michael@0:     XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX,
michael@0:     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
michael@0:     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
michael@0:     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
michael@0:     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
michael@0:     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
michael@0:     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
michael@0:     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
michael@0:     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
michael@0:     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
michael@0: };
michael@0: 
michael@0: static PRBool _isdigit(char c) { return c >= '0' && c <= '9'; }
michael@0: static PRBool _isxdigit(char c) { return index_hex[(unsigned char) c] != XX; }
michael@0: static PRBool _isspace(char c) { return c == ' ' || (c >= '\t' && c <= '\r'); }
michael@0: #undef XX
michael@0: 
michael@0: int
michael@0: pr_inet_aton(const char *cp, PRUint32 *addr)
michael@0: {
michael@0:     PRUint32 val;
michael@0:     int base, n;
michael@0:     char c;
michael@0:     PRUint8 parts[4];
michael@0:     PRUint8 *pp = parts;
michael@0:     int digit;
michael@0: 
michael@0:     c = *cp;
michael@0:     for (;;) {
michael@0:         /*
michael@0:          * Collect number up to ``.''.
michael@0:          * Values are specified as for C:
michael@0:          * 0x=hex, 0=octal, isdigit=decimal.
michael@0:          */
michael@0:         if (!_isdigit(c))
michael@0:             return (0);
michael@0:         val = 0; base = 10; digit = 0;
michael@0:         if (c == '0') {
michael@0:             c = *++cp;
michael@0:             if (c == 'x' || c == 'X')
michael@0:                 base = 16, c = *++cp;
michael@0:             else {
michael@0:                 base = 8;
michael@0:                 digit = 1;
michael@0:             }
michael@0:         }
michael@0:         for (;;) {
michael@0:             if (_isdigit(c)) {
michael@0:                 if (base == 8 && (c == '8' || c == '9'))
michael@0:                     return (0);
michael@0:                 val = (val * base) + (c - '0');
michael@0:                 c = *++cp;
michael@0:                 digit = 1;
michael@0:             } else if (base == 16 && _isxdigit(c)) {
michael@0:                 val = (val << 4) + index_hex[(unsigned char) c];
michael@0:                 c = *++cp;
michael@0:                 digit = 1;
michael@0:             } else
michael@0:                 break;
michael@0:         }
michael@0:         if (c == '.') {
michael@0:             /*
michael@0:              * Internet format:
michael@0:              *    a.b.c.d
michael@0:              *    a.b.c    (with c treated as 16 bits)
michael@0:              *    a.b    (with b treated as 24 bits)
michael@0:              */
michael@0:             if (pp >= parts + 3 || val > 0xffU)
michael@0:                 return (0);
michael@0:             *pp++ = val;
michael@0:             c = *++cp;
michael@0:         } else
michael@0:             break;
michael@0:     }
michael@0:     /*
michael@0:      * Check for trailing characters.
michael@0:      */
michael@0:     if (c != '\0' && !_isspace(c))
michael@0:         return (0);
michael@0:     /*
michael@0:      * Did we get a valid digit?
michael@0:      */
michael@0:     if (!digit)
michael@0:         return (0);
michael@0:     /*
michael@0:      * Concoct the address according to
michael@0:      * the number of parts specified.
michael@0:      */
michael@0:     n = pp - parts + 1;
michael@0:     switch (n) {
michael@0:     case 1:                /*%< a -- 32 bits */
michael@0:         break;
michael@0: 
michael@0:     case 2:                /*%< a.b -- 8.24 bits */
michael@0:         if (val > 0xffffffU)
michael@0:             return (0);
michael@0:         val |= parts[0] << 24;
michael@0:         break;
michael@0: 
michael@0:     case 3:                /*%< a.b.c -- 8.8.16 bits */
michael@0:         if (val > 0xffffU)
michael@0:             return (0);
michael@0:         val |= (parts[0] << 24) | (parts[1] << 16);
michael@0:         break;
michael@0: 
michael@0:     case 4:                /*%< a.b.c.d -- 8.8.8.8 bits */
michael@0:         if (val > 0xffU)
michael@0:             return (0);
michael@0:         val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
michael@0:         break;
michael@0:     }
michael@0:     *addr = PR_htonl(val);
michael@0:     return (1);
michael@0: }
michael@0: