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3c0ef626 | 1 | /* $OpenBSD: inet_addr.c,v 1.6 1999/05/03 22:31:14 yanick Exp $ */ |
2 | ||
3 | /* | |
4 | * ++Copyright++ 1983, 1990, 1993 | |
5 | * - | |
6 | * Copyright (c) 1983, 1990, 1993 | |
7 | * The Regents of the University of California. All rights reserved. | |
8 | * | |
9 | * Redistribution and use in source and binary forms, with or without | |
10 | * modification, are permitted provided that the following conditions | |
11 | * are met: | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. All advertising materials mentioning features or use of this software | |
18 | * must display the following acknowledgement: | |
19 | * This product includes software developed by the University of | |
20 | * California, Berkeley and its contributors. | |
21 | * 4. Neither the name of the University nor the names of its contributors | |
22 | * may be used to endorse or promote products derived from this software | |
23 | * without specific prior written permission. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
30 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
31 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
32 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
33 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
34 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
35 | * SUCH DAMAGE. | |
36 | * - | |
37 | * Portions Copyright (c) 1993 by Digital Equipment Corporation. | |
38 | * | |
39 | * Permission to use, copy, modify, and distribute this software for any | |
40 | * purpose with or without fee is hereby granted, provided that the above | |
41 | * copyright notice and this permission notice appear in all copies, and that | |
42 | * the name of Digital Equipment Corporation not be used in advertising or | |
43 | * publicity pertaining to distribution of the document or software without | |
44 | * specific, written prior permission. | |
45 | * | |
46 | * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL | |
47 | * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES | |
48 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT | |
49 | * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL | |
50 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR | |
51 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS | |
52 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |
53 | * SOFTWARE. | |
54 | * - | |
55 | * --Copyright-- | |
56 | */ | |
57 | ||
58 | #include "config.h" | |
59 | ||
60 | #if !defined(HAVE_INET_ATON) | |
61 | ||
62 | #if defined(LIBC_SCCS) && !defined(lint) | |
63 | #if 0 | |
64 | static char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93"; | |
65 | static char rcsid[] = "$From: inet_addr.c,v 8.5 1996/08/05 08:31:35 vixie Exp $"; | |
66 | #else | |
67 | static char rcsid[] = "$OpenBSD: inet_addr.c,v 1.6 1999/05/03 22:31:14 yanick Exp $"; | |
68 | #endif | |
69 | #endif /* LIBC_SCCS and not lint */ | |
70 | ||
71 | #include <sys/types.h> | |
72 | #include <sys/param.h> | |
73 | #include <netinet/in.h> | |
74 | #include <arpa/inet.h> | |
75 | #include <ctype.h> | |
76 | ||
77 | #if 0 | |
78 | /* | |
79 | * Ascii internet address interpretation routine. | |
80 | * The value returned is in network order. | |
81 | */ | |
82 | in_addr_t | |
83 | inet_addr(cp) | |
84 | register const char *cp; | |
85 | { | |
86 | struct in_addr val; | |
87 | ||
88 | if (inet_aton(cp, &val)) | |
89 | return (val.s_addr); | |
90 | return (INADDR_NONE); | |
91 | } | |
92 | #endif | |
93 | ||
94 | /* | |
95 | * Check whether "cp" is a valid ascii representation | |
96 | * of an Internet address and convert to a binary address. | |
97 | * Returns 1 if the address is valid, 0 if not. | |
98 | * This replaces inet_addr, the return value from which | |
99 | * cannot distinguish between failure and a local broadcast address. | |
100 | */ | |
101 | int | |
102 | inet_aton(const char *cp, struct in_addr *addr) | |
103 | { | |
104 | register u_int32_t val; | |
105 | register int base, n; | |
106 | register char c; | |
107 | unsigned int parts[4]; | |
108 | register unsigned int *pp = parts; | |
109 | ||
110 | c = *cp; | |
111 | for (;;) { | |
112 | /* | |
113 | * Collect number up to ``.''. | |
114 | * Values are specified as for C: | |
115 | * 0x=hex, 0=octal, isdigit=decimal. | |
116 | */ | |
117 | if (!isdigit(c)) | |
118 | return (0); | |
119 | val = 0; base = 10; | |
120 | if (c == '0') { | |
121 | c = *++cp; | |
122 | if (c == 'x' || c == 'X') | |
123 | base = 16, c = *++cp; | |
124 | else | |
125 | base = 8; | |
126 | } | |
127 | for (;;) { | |
128 | if (isascii(c) && isdigit(c)) { | |
129 | val = (val * base) + (c - '0'); | |
130 | c = *++cp; | |
131 | } else if (base == 16 && isascii(c) && isxdigit(c)) { | |
132 | val = (val << 4) | | |
133 | (c + 10 - (islower(c) ? 'a' : 'A')); | |
134 | c = *++cp; | |
135 | } else | |
136 | break; | |
137 | } | |
138 | if (c == '.') { | |
139 | /* | |
140 | * Internet format: | |
141 | * a.b.c.d | |
142 | * a.b.c (with c treated as 16 bits) | |
143 | * a.b (with b treated as 24 bits) | |
144 | */ | |
145 | if (pp >= parts + 3) | |
146 | return (0); | |
147 | *pp++ = val; | |
148 | c = *++cp; | |
149 | } else | |
150 | break; | |
151 | } | |
152 | /* | |
153 | * Check for trailing characters. | |
154 | */ | |
155 | if (c != '\0' && (!isascii(c) || !isspace(c))) | |
156 | return (0); | |
157 | /* | |
158 | * Concoct the address according to | |
159 | * the number of parts specified. | |
160 | */ | |
161 | n = pp - parts + 1; | |
162 | switch (n) { | |
163 | ||
164 | case 0: | |
165 | return (0); /* initial nondigit */ | |
166 | ||
167 | case 1: /* a -- 32 bits */ | |
168 | break; | |
169 | ||
170 | case 2: /* a.b -- 8.24 bits */ | |
171 | if ((val > 0xffffff) || (parts[0] > 0xff)) | |
172 | return (0); | |
173 | val |= parts[0] << 24; | |
174 | break; | |
175 | ||
176 | case 3: /* a.b.c -- 8.8.16 bits */ | |
177 | if ((val > 0xffff) || (parts[0] > 0xff) || (parts[1] > 0xff)) | |
178 | return (0); | |
179 | val |= (parts[0] << 24) | (parts[1] << 16); | |
180 | break; | |
181 | ||
182 | case 4: /* a.b.c.d -- 8.8.8.8 bits */ | |
183 | if ((val > 0xff) || (parts[0] > 0xff) || (parts[1] > 0xff) || (parts[2] > 0xff)) | |
184 | return (0); | |
185 | val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); | |
186 | break; | |
187 | } | |
188 | if (addr) | |
189 | addr->s_addr = htonl(val); | |
190 | return (1); | |
191 | } | |
192 | ||
193 | #endif /* !defined(HAVE_INET_ATON) */ |