/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /******************************************************************************* * The following function pr_inet_aton is based on the BSD function inet_aton * with some modifications. The license and copyright notices applying to this * function appear below. Modifications are also according to the license below.
******************************************************************************/
#include"prnetdb.h"
/* * 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.
*/
/* * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") * 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 ISC DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
*/
static PRBool _isdigit(char c) { return c >= '0' && c <= '9'; } static PRBool _isxdigit(char c) { return index_hex[(unsignedchar)c] != XX; } static PRBool _isspace(char c) { return c == ' ' || (c >= '\t' && c <= '\r'); } #undef XX
int pr_inet_aton(constchar* cp, PRUint32* addr) {
PRUint32 val; int base, n; char c;
PRUint8 parts[4];
PRUint8* pp = parts; int digit;
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;
digit = 0; if (c == '0') {
c = *++cp; if (c == 'x' || c == 'X') {
base = 16, c = *++cp;
} else {
base = 8;
digit = 1;
}
} for (;;) { if (_isdigit(c)) { if (base == 8 && (c == '8' || c == '9')) { return (0);
}
val = (val * base) + (c - '0');
c = *++cp;
digit = 1;
} elseif (base == 16 && _isxdigit(c)) {
val = (val << 4) + index_hex[(unsignedchar)c];
c = *++cp;
digit = 1;
} 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 || val > 0xffU) { return (0);
}
*pp++ = val;
c = *++cp;
} else { break;
}
} /* * Check for trailing characters.
*/ if (c != '\0' && !_isspace(c)) { return (0);
} /* * Did we get a valid digit?
*/ if (!digit) { return (0);
} /* * Concoct the address according to * the number of parts specified.
*/
n = pp - parts + 1; switch (n) { case 1: /*%< a -- 32 bits */ break;
case 2: /*%< a.b -- 8.24 bits */ if (val > 0xffffffU) { return (0);
}
val |= (unsignedint)parts[0] << 24; break;
case 3: /*%< a.b.c -- 8.8.16 bits */ if (val > 0xffffU) { return (0);
}
val |= ((unsignedint)parts[0] << 24) | ((unsignedint)parts[1] << 16); break;
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