nsprpub/pr/src/misc/praton.c@6474c204b198
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.
1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /*******************************************************************************
3 * The following function pr_inet_aton is based on the BSD function inet_aton
4 * with some modifications. The license and copyright notices applying to this
5 * function appear below. Modifications are also according to the license below.
6 ******************************************************************************/
8 #include "prnetdb.h"
10 /*
11 * Copyright (c) 1983, 1990, 1993
12 * The Regents of the University of California. All rights reserved.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 */
39 /*
40 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
41 *
42 * Permission to use, copy, modify, and distribute this software for any
43 * purpose with or without fee is hereby granted, provided that the above
44 * copyright notice and this permission notice appear in all copies, and that
45 * the name of Digital Equipment Corporation not be used in advertising or
46 * publicity pertaining to distribution of the document or software without
47 * specific, written prior permission.
48 *
49 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
50 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
51 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
52 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
53 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
54 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
55 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
56 * SOFTWARE.
57 */
59 /*
60 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
61 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
62 *
63 * Permission to use, copy, modify, and distribute this software for any
64 * purpose with or without fee is hereby granted, provided that the above
65 * copyright notice and this permission notice appear in all copies.
66 *
67 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
68 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
69 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
70 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
71 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
72 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
73 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
74 */
76 #define XX 127
77 static const unsigned char index_hex[256] = {
78 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
79 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
80 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
81 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,XX,XX, XX,XX,XX,XX,
82 XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX,
83 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
84 XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX,
85 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
86 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
87 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
88 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
89 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
90 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
91 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
92 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
93 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
94 };
96 static PRBool _isdigit(char c) { return c >= '0' && c <= '9'; }
97 static PRBool _isxdigit(char c) { return index_hex[(unsigned char) c] != XX; }
98 static PRBool _isspace(char c) { return c == ' ' || (c >= '\t' && c <= '\r'); }
99 #undef XX
101 int
102 pr_inet_aton(const char *cp, PRUint32 *addr)
103 {
104 PRUint32 val;
105 int base, n;
106 char c;
107 PRUint8 parts[4];
108 PRUint8 *pp = parts;
109 int digit;
111 c = *cp;
112 for (;;) {
113 /*
114 * Collect number up to ``.''.
115 * Values are specified as for C:
116 * 0x=hex, 0=octal, isdigit=decimal.
117 */
118 if (!_isdigit(c))
119 return (0);
120 val = 0; base = 10; digit = 0;
121 if (c == '0') {
122 c = *++cp;
123 if (c == 'x' || c == 'X')
124 base = 16, c = *++cp;
125 else {
126 base = 8;
127 digit = 1;
128 }
129 }
130 for (;;) {
131 if (_isdigit(c)) {
132 if (base == 8 && (c == '8' || c == '9'))
133 return (0);
134 val = (val * base) + (c - '0');
135 c = *++cp;
136 digit = 1;
137 } else if (base == 16 && _isxdigit(c)) {
138 val = (val << 4) + index_hex[(unsigned char) c];
139 c = *++cp;
140 digit = 1;
141 } else
142 break;
143 }
144 if (c == '.') {
145 /*
146 * Internet format:
147 * a.b.c.d
148 * a.b.c (with c treated as 16 bits)
149 * a.b (with b treated as 24 bits)
150 */
151 if (pp >= parts + 3 || val > 0xffU)
152 return (0);
153 *pp++ = val;
154 c = *++cp;
155 } else
156 break;
157 }
158 /*
159 * Check for trailing characters.
160 */
161 if (c != '\0' && !_isspace(c))
162 return (0);
163 /*
164 * Did we get a valid digit?
165 */
166 if (!digit)
167 return (0);
168 /*
169 * Concoct the address according to
170 * the number of parts specified.
171 */
172 n = pp - parts + 1;
173 switch (n) {
174 case 1: /*%< a -- 32 bits */
175 break;
177 case 2: /*%< a.b -- 8.24 bits */
178 if (val > 0xffffffU)
179 return (0);
180 val |= parts[0] << 24;
181 break;
183 case 3: /*%< a.b.c -- 8.8.16 bits */
184 if (val > 0xffffU)
185 return (0);
186 val |= (parts[0] << 24) | (parts[1] << 16);
187 break;
189 case 4: /*%< a.b.c.d -- 8.8.8.8 bits */
190 if (val > 0xffU)
191 return (0);
192 val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
193 break;
194 }
195 *addr = PR_htonl(val);
196 return (1);
197 }
