/[cvs]/eggdrop1.8/src/compat/inet_aton.c
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Annotation of /eggdrop1.8/src/compat/inet_aton.c

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Revision 1.1.1.1 - (hide annotations) (download) (as text) (vendor branch)
Mon Jul 26 21:11:06 2010 UTC (9 years, 1 month ago) by simple
Branch: eggheads, MAIN
CVS Tags: v1, HEAD
Branch point for: gettext
Changes since 1.1: +0 -0 lines
File MIME type: text/x-chdr
Imported Eggdrop 1.6.20

1 simple 1.1 /*
2     * inet_aton.c -- provides inet_aton() if necessary.
3     *
4     * $Id: inet_aton.c,v 1.1.1.1 2010/07/26 21:11:06 simple Exp $
5     */
6     /*
7     * Portions Copyright (C) 2000 - 2010 Eggheads Development Team
8     *
9     * This program is free software; you can redistribute it and/or
10     * modify it under the terms of the GNU General Public License
11     * as published by the Free Software Foundation; either version 2
12     * of the License, or (at your option) any later version.
13     *
14     * This program is distributed in the hope that it will be useful,
15     * but WITHOUT ANY WARRANTY; without even the implied warranty of
16     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17     * GNU General Public License for more details.
18     *
19     * You should have received a copy of the GNU General Public License
20     * along with this program; if not, write to the Free Software
21     * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22     */
23    
24     #include "main.h"
25     #include "inet_aton.h"
26    
27     #ifndef HAVE_ISASCII
28     # define inet_isascii(x) 1 /* Let checks succeed if we don't have isascii(). */
29     #else
30     # define inet_isascii(x) egg_isascii(x)
31     #endif
32    
33     #ifndef HAVE_INET_ATON
34     /*
35     * ++Copyright++ 1983, 1990, 1993
36     * -
37     * Copyright (c) 1983, 1990, 1993
38     * The Regents of the University of California. All rights reserved.
39     *
40     * Redistribution and use in source and binary forms, with or without
41     * modification, are permitted provided that the following conditions
42     * are met:
43     * 1. Redistributions of source code must retain the above copyright
44     * notice, this list of conditions and the following disclaimer.
45     * 2. Redistributions in binary form must reproduce the above copyright
46     * notice, this list of conditions and the following disclaimer in the
47     * documentation and/or other materials provided with the distribution.
48     * 3. All advertising materials mentioning features or use of this software
49     * must display the following acknowledgement:
50     * This product includes software developed by the University of
51     * California, Berkeley and its contributors.
52     * 4. Neither the name of the University nor the names of its contributors
53     * may be used to endorse or promote products derived from this software
54     * without specific prior written permission.
55     *
56     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
57     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
58     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
59     * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
60     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
61     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
62     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
63     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
64     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
65     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
66     * SUCH DAMAGE.
67     * -
68     * Portions Copyright (c) 1993 by Digital Equipment Corporation.
69     *
70     * Permission to use, copy, modify, and distribute this software for any
71     * purpose with or without fee is hereby granted, provided that the above
72     * copyright notice and this permission notice appear in all copies, and that
73     * the name of Digital Equipment Corporation not be used in advertising or
74     * publicity pertaining to distribution of the document or software without
75     * specific, written prior permission.
76     *
77     * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
78     * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
79     * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
80     * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
81     * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
82     * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
83     * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
84     * SOFTWARE.
85     * --Copyright--
86     */
87    
88     #if defined(LIBC_SCCS) && !defined(lint)
89     static char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93";
90     static char rcsid[] = "$-Id: inet_addr.c,v 1.11 1999/04/29 18:19:53 drepper Exp $";
91     #endif /* LIBC_SCCS and not lint */
92    
93     #include <sys/types.h>
94     #include <sys/param.h>
95     #include <ctype.h>
96    
97     /*
98     * Check whether "cp" is a valid ascii representation
99     * of an Internet address and convert to a binary address.
100     * Returns 1 if the address is valid, 0 if not.
101     * This replaces inet_addr, the return value from which
102     * cannot distinguish between failure and a local broadcast address.
103     */
104     int egg_inet_aton(cp, addr)
105     const char *cp;
106     struct in_addr *addr;
107     {
108     static const u_32bit_t max[4] = { 0xffffffff, 0xffffff, 0xffff, 0xff };
109     register u_32bit_t val; /* changed from u_long --david */
110     register int base;
111     register int n;
112     register char c;
113     u_32bit_t parts[4];
114     register u_32bit_t *pp = parts;
115    
116     egg_bzero(parts, sizeof(parts));
117    
118     c = *cp;
119     for (;;) {
120     /*
121     * Collect number up to ``.''.
122     * Values are specified as for C:
123     * 0x=hex, 0=octal, isdigit=decimal.
124     */
125     if (!egg_isdigit(c))
126     goto ret_0;
127     base = 10;
128     if (c == '0') {
129     c = *++cp;
130     if (c == 'x' || c == 'X')
131     base = 16, c = *++cp;
132     else
133     base = 8;
134     }
135     val = 0;
136     for (;;) {
137     if (inet_isascii(c) && egg_isdigit(c)) {
138     val = (val * base) + (c - '0');
139     c = *++cp;
140     } else if (base == 16 && inet_isascii(c) && egg_isxdigit(c)) {
141     val = (val << 4) | (c + 10 - (egg_islower(c) ? 'a' : 'A'));
142     c = *++cp;
143     } else
144     break;
145     }
146     if (c == '.') {
147     /*
148     * Internet format:
149     * a.b.c.d
150     * a.b.c (with c treated as 16 bits)
151     * a.b (with b treated as 24 bits)
152     */
153     if (pp >= parts + 3)
154     goto ret_0;
155     *pp++ = val;
156     c = *++cp;
157     } else
158     break;
159     }
160     /*
161     * Check for trailing characters.
162     */
163     if (c != '\0' && (!inet_isascii(c) || !egg_isspace(c)))
164     goto ret_0;
165     /*
166     * Concoct the address according to
167     * the number of parts specified.
168     */
169     n = pp - parts + 1;
170    
171     if (n == 0 || /* initial nondigit */
172     parts[0] > 0xff || parts[1] > 0xff || parts[2] > 0xff ||
173     val > max[n - 1])
174     goto ret_0;
175    
176     val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
177    
178     if (addr)
179     addr->s_addr = htonl(val);
180     return 1;
181    
182     ret_0:
183     return 0;
184     }
185     #endif /* !HAVE_INET_ATON */

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