1 /** @File
2 Internet network address interpretation routine.
3
4 Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials are licensed and made available under
6 the terms and conditions of the BSD License that accompanies this distribution.
7 The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.
9
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12
13 * Copyright (c) 1983, 1993
14 * The Regents of the University of California. All rights reserved.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39
40 NetBSD: inet_network.c,v 1.1 2004/05/20 23:13:02 christos Exp
41 inet_network.c 8.1 (Berkeley) 6/4/93
42 **/
43 #include <LibConfig.h>
44
45 #include "namespace.h"
46 #include <sys/types.h>
47 #include <netinet/in.h>
48 #include <arpa/inet.h>
49
50 #include <assert.h>
51 #include <ctype.h>
52 #ifdef _DIAGNOSTIC
53 #include <stddef.h> /* for NULL */
54 #endif
55
56 #ifdef __weak_alias
__weak_alias(inet_network,_inet_network)57 __weak_alias(inet_network,_inet_network)
58 #endif
59
60 /*
61 * Internet network address interpretation routine.
62 * The library routines call this routine to interpret
63 * network numbers.
64 */
65 in_addr_t
66 inet_network(const char *cp)
67 {
68 in_addr_t val;
69 size_t i, n;
70 u_char c;
71 in_addr_t parts[4], *pp = parts;
72 int digit, base;
73
74 _DIAGASSERT(cp != NULL);
75
76 again:
77 val = 0; base = 10; digit = 0;
78 if (*cp == '0')
79 digit = 1, base = 8, cp++;
80 if (*cp == 'x' || *cp == 'X')
81 base = 16, cp++;
82 while ((c = *cp) != 0) {
83 if (isdigit(c)) {
84 if (base == 8 && (c == '8' || c == '9'))
85 return (INADDR_NONE);
86 val = (val * base) + (c - '0');
87 cp++;
88 digit = 1;
89 continue;
90 }
91 if (base == 16 && isxdigit(c)) {
92 val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A'));
93 cp++;
94 digit = 1;
95 continue;
96 }
97 break;
98 }
99 if (!digit)
100 return (INADDR_NONE);
101 if (*cp == '.') {
102 if (pp >= parts + 4 || val > 0xff)
103 return (INADDR_NONE);
104 *pp++ = val, cp++;
105 goto again;
106 }
107 if (*cp && !isspace((u_char) *cp))
108 return (INADDR_NONE);
109 if (pp >= parts + 4 || val > 0xff)
110 return (INADDR_NONE);
111 *pp++ = val;
112 n = pp - parts;
113 if (n > 4)
114 return (INADDR_NONE);
115 for (val = 0, i = 0; i < n; i++) {
116 val <<= 8;
117 val |= parts[i] & 0xff;
118 }
119 return (val);
120 }
121