Add the DragonFly cvs id and perform general cleanups on cvs/rcs/sccs ids. Most
[dragonfly.git] / crypto / openssh / openbsd-compat / inet_aton.c
CommitLineData
984263bc
MD
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--
1de703da
MD
56 *
57 * @(#)inet_addr.c 8.1 (Berkeley) 6/17/93
58 * $From: inet_addr.c,v 8.5 1996/08/05 08:31:35 vixie Exp $
59 * $OpenBSD: inet_addr.c,v 1.6 1999/05/03 22:31:14 yanick Exp $
984263bc
MD
60 */
61
62#include "includes.h"
63
64#if !defined(HAVE_INET_ATON)
65
984263bc
MD
66#include <sys/types.h>
67#include <sys/param.h>
68#include <netinet/in.h>
69#include <arpa/inet.h>
70#include <ctype.h>
71
72#if 0
73/*
74 * Ascii internet address interpretation routine.
75 * The value returned is in network order.
76 */
77in_addr_t
78inet_addr(cp)
79 register const char *cp;
80{
81 struct in_addr val;
82
83 if (inet_aton(cp, &val))
84 return (val.s_addr);
85 return (INADDR_NONE);
86}
87#endif
88
89/*
90 * Check whether "cp" is a valid ascii representation
91 * of an Internet address and convert to a binary address.
92 * Returns 1 if the address is valid, 0 if not.
93 * This replaces inet_addr, the return value from which
94 * cannot distinguish between failure and a local broadcast address.
95 */
96int
97inet_aton(const char *cp, struct in_addr *addr)
98{
99 register u_int32_t val;
100 register int base, n;
101 register char c;
102 unsigned int parts[4];
103 register unsigned int *pp = parts;
104
105 c = *cp;
106 for (;;) {
107 /*
108 * Collect number up to ``.''.
109 * Values are specified as for C:
110 * 0x=hex, 0=octal, isdigit=decimal.
111 */
112 if (!isdigit(c))
113 return (0);
114 val = 0; base = 10;
115 if (c == '0') {
116 c = *++cp;
117 if (c == 'x' || c == 'X')
118 base = 16, c = *++cp;
119 else
120 base = 8;
121 }
122 for (;;) {
123 if (isascii(c) && isdigit(c)) {
124 val = (val * base) + (c - '0');
125 c = *++cp;
126 } else if (base == 16 && isascii(c) && isxdigit(c)) {
127 val = (val << 4) |
128 (c + 10 - (islower(c) ? 'a' : 'A'));
129 c = *++cp;
130 } else
131 break;
132 }
133 if (c == '.') {
134 /*
135 * Internet format:
136 * a.b.c.d
137 * a.b.c (with c treated as 16 bits)
138 * a.b (with b treated as 24 bits)
139 */
140 if (pp >= parts + 3)
141 return (0);
142 *pp++ = val;
143 c = *++cp;
144 } else
145 break;
146 }
147 /*
148 * Check for trailing characters.
149 */
150 if (c != '\0' && (!isascii(c) || !isspace(c)))
151 return (0);
152 /*
153 * Concoct the address according to
154 * the number of parts specified.
155 */
156 n = pp - parts + 1;
157 switch (n) {
158
159 case 0:
160 return (0); /* initial nondigit */
161
162 case 1: /* a -- 32 bits */
163 break;
164
165 case 2: /* a.b -- 8.24 bits */
166 if ((val > 0xffffff) || (parts[0] > 0xff))
167 return (0);
168 val |= parts[0] << 24;
169 break;
170
171 case 3: /* a.b.c -- 8.8.16 bits */
172 if ((val > 0xffff) || (parts[0] > 0xff) || (parts[1] > 0xff))
173 return (0);
174 val |= (parts[0] << 24) | (parts[1] << 16);
175 break;
176
177 case 4: /* a.b.c.d -- 8.8.8.8 bits */
178 if ((val > 0xff) || (parts[0] > 0xff) || (parts[1] > 0xff) || (parts[2] > 0xff))
179 return (0);
180 val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
181 break;
182 }
183 if (addr)
184 addr->s_addr = htonl(val);
185 return (1);
186}
187
188#endif /* !defined(HAVE_INET_ATON) */