The Tor Browser: nsprpub/pr/src/misc/praton.c@6474c204b198 (annotated)

nsprpub/pr/src/misc/praton.c@6474c204b198 (annotated)

nsprpub/pr/src/misc/praton.c

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- 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.
  */
 #define XX 127
 static const unsigned char index_hex[256] = {
     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
 , 1, 2, 3,  4, 5, 6, 7,  8, 9,XX,XX, XX,XX,XX,XX,
     XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX,
     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
     XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX,
     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
     XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
 };
 static PRBool _isdigit(char c) { return c >= '0' && c <= '9'; }
 static PRBool _isxdigit(char c) { return index_hex[(unsigned char) c] != XX; }
 static PRBool _isspace(char c) { return c == ' ' || (c >= '\t' && c <= '\r'); }
 #undef XX
 int
 pr_inet_aton(const char *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;
             } else if (base == 16 && _isxdigit(c)) {
                 val = (val << 4) + index_hex[(unsigned char) 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 |= parts[0] << 24;
         break;
     case 3:                /*%< a.b.c -- 8.8.16 bits */
         if (val > 0xffffU)
             return (0);
         val |= (parts[0] << 24) | (parts[1] << 16);
         break;
     case 4:                /*%< a.b.c.d -- 8.8.8.8 bits */
         if (val > 0xffU)
             return (0);
         val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
         break;
     }
     *addr = PR_htonl(val);
     return (1);
 }

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nsprpub/pr/src/misc/praton.c@6474c204b198 (annotated)

nsprpub/pr/src/misc/praton.c