src/compat/inet_aton.c

/*
 * ++Copyright++ 1983, 1990, 1993
 * -
 * Copyright (c) 1983, 1990, 1993
 *    The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * -
 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies, and that
 * the name of Digital Equipment Corporation not be used in advertising or
 * publicity pertaining to distribution of the document or software without
 * specific, written prior permission.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 * -
 * --Copyright--
 */
#include "common/setup_before.h"
#ifndef HAVE_INET_ATON

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93";
static char rcsid[] = "$Id: inet_aton.c,v 1.1.1.1 2002/12/27 08:45:08 dizzy Exp $";
#endif /* LIBC_SCCS and not lint */

#include <ctype.h>
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif
#include "compat/socket.h" /* for Win32 address types, maybe there should be compat/netinet_in.h */
#include "inet_aton.h"
#include "common/setup_after.h"


/*
 * Check whether "cp" is a valid ASCII representation
 * of an Internet address and convert to a binary address.
 * Returns 1 if the address is valid, 0 if not.
 * This replaces inet_addr, the return value from which
 * cannot distinguish between failure and a local wildcard address.
 * Only handles IPv4.
 * Assumes 32-bit ints.
 */
extern int inet_aton(char const * cp, struct in_addr * addr)
{
        unsigned int val;
        int base, n;
        char c;
        unsigned int parts[4];
        unsigned int *pp = parts;

        c = *cp;
        for (;;) {
                /*
                 * Collect number up to ``.''.
                 * Values are specified as for C:
                 * 0x=hex, 0=octal, isdigit=decimal.
                 */
                if (!isdigit((int)c))
                        return (0);
                val = 0; base = 10;
                if (c == '0') {
                        c = *++cp;
                        if (c == 'x' || c == 'X')
                                base = 16, c = *++cp;
                        else
                                base = 8;
                }
                for (;;) {
                        if (isascii((int)c) && isdigit((int)c)) {
                                val = (val * base) + (c - '0');
                                c = *++cp;
                        } else if (base == 16 && isascii((int)c) && isxdigit((int)c)) {
                                val = (val << 4) |
                                        (c + 10 - (islower((int)c) ? 'a' : 'A'));
                                c = *++cp;
                        } else
                                break;
                }
                if (c == '.') {
                        /*
                         * Internet format:
                         *      a.b.c.d
                         *      a.b.c   (with c treated as 16 bits)
                         *      a.b     (with b treated as 24 bits)
                         */
                        if (pp >= parts + 3)
                                return (0);
                        *pp++ = val;
                        c = *++cp;
                } else
                        break;
        }
        /*
         * Check for trailing characters.
         */
        if (c != '\0' && (!isascii((int)c) || !isspace((int)c)))
                return (0);
        /*
         * Concoct the address according to
         * the number of parts specified.
         */
        n = pp - parts + 1;
        switch (n) {

        case 0:
                return (0);             /* initial nondigit */

        case 1:                         /* a -- 32 bits */
                break;

        case 2:                         /* a.b -- 8.24 bits */
                if (val > 0xffffff)
                        return (0);
                val |= parts[0] << 24;
                break;

        case 3:                         /* a.b.c -- 8.8.16 bits */
                if (val > 0xffff)
                        return (0);
                val |= (parts[0] << 24) | (parts[1] << 16);
                break;

        case 4:                         /* a.b.c.d -- 8.8.8.8 bits */
                if (val > 0xff)
                        return (0);
                val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
                break;
        }
        if (addr)
                addr->s_addr = htonl(val);
        return (1);
}

#else
typedef int filenotempty; /* make ISO standard happy */
#endif
1	/*
2	* ++Copyright++ 1983, 1990, 1993
3	* -
4	* Copyright (c) 1983, 1990, 1993
5	* The Regents of the University of California. All rights reserved.
6	*
7	* Redistribution and use in source and binary forms, with or without
8	* modification, are permitted provided that the following conditions
9	* are met:
10	* 1. Redistributions of source code must retain the above copyright
11	* notice, this list of conditions and the following disclaimer.
12	* 2. Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in the
14	* documentation and/or other materials provided with the distribution.
15	* 3. All advertising materials mentioning features or use of this software
16	* must display the following acknowledgement:
17	* This product includes software developed by the University of
18	* California, Berkeley and its contributors.
19	* 4. Neither the name of the University nor the names of its contributors
20	* may be used to endorse or promote products derived from this software
21	* without specific prior written permission.
22	*
23	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33	* SUCH DAMAGE.
34	* -
35	* Portions Copyright (c) 1993 by Digital Equipment Corporation.
36	*
37	* Permission to use, copy, modify, and distribute this software for any
38	* purpose with or without fee is hereby granted, provided that the above
39	* copyright notice and this permission notice appear in all copies, and that
40	* the name of Digital Equipment Corporation not be used in advertising or
41	* publicity pertaining to distribution of the document or software without
42	* specific, written prior permission.
43	*
44	* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
45	* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
46	* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
47	* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
48	* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
49	* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
50	* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
51	* SOFTWARE.
52	* -
53	* --Copyright--
54	*/
55	#include "common/setup_before.h"
56	#ifndef HAVE_INET_ATON
57
58	#if defined(LIBC_SCCS) && !defined(lint)
59	static char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93";
60	static char rcsid[] = "$Id: inet_aton.c,v 1.1.1.1 2002/12/27 08:45:08 dizzy Exp $";
61	#endif /* LIBC_SCCS and not lint */
62
63	#include <ctype.h>
64	#ifdef HAVE_SYS_TYPES_H
65	# include <sys/types.h>
66	#endif
67	#ifdef HAVE_SYS_PARAM_H
68	# include <sys/param.h>
69	#endif
70	#ifdef HAVE_NETINET_IN_H
71	# include <netinet/in.h>
72	#endif
73	#ifdef HAVE_ARPA_INET_H
74	# include <arpa/inet.h>
75	#endif
76	#include "compat/socket.h" /* for Win32 address types, maybe there should be compat/netinet_in.h */
77	#include "inet_aton.h"
78	#include "common/setup_after.h"
79
80
81	/*
82	* Check whether "cp" is a valid ASCII representation
83	* of an Internet address and convert to a binary address.
84	* Returns 1 if the address is valid, 0 if not.
85	* This replaces inet_addr, the return value from which
86	* cannot distinguish between failure and a local wildcard address.
87	* Only handles IPv4.
88	* Assumes 32-bit ints.
89	*/
90	extern int inet_aton(char const * cp, struct in_addr * addr)
91	{
92	unsigned int val;
93	int base, n;
94	char c;
95	unsigned int parts[4];
96	unsigned int *pp = parts;
97
98	c = *cp;
99	for (;;) {
100	/*
101	* Collect number up to ``.''.
102	* Values are specified as for C:
103	* 0x=hex, 0=octal, isdigit=decimal.
104	*/
105	if (!isdigit((int)c))
106	return (0);
107	val = 0; base = 10;
108	if (c == '0') {
109	c = *++cp;
110	if (c == 'x' \|\| c == 'X')
111	base = 16, c = *++cp;
112	else
113	base = 8;
114	}
115	for (;;) {
116	if (isascii((int)c) && isdigit((int)c)) {
117	val = (val * base) + (c - '0');
118	c = *++cp;
119	} else if (base == 16 && isascii((int)c) && isxdigit((int)c)) {
120	val = (val << 4) \|
121	(c + 10 - (islower((int)c) ? 'a' : 'A'));
122	c = *++cp;
123	} else
124	break;
125	}
126	if (c == '.') {
127	/*
128	* Internet format:
129	* a.b.c.d
130	* a.b.c (with c treated as 16 bits)
131	* a.b (with b treated as 24 bits)
132	*/
133	if (pp >= parts + 3)
134	return (0);
135	*pp++ = val;
136	c = *++cp;
137	} else
138	break;
139	}
140	/*
141	* Check for trailing characters.
142	*/
143	if (c != '\0' && (!isascii((int)c) \|\| !isspace((int)c)))
144	return (0);
145	/*
146	* Concoct the address according to
147	* the number of parts specified.
148	*/
149	n = pp - parts + 1;
150	switch (n) {
151
152	case 0:
153	return (0); /* initial nondigit */
154
155	case 1: /* a -- 32 bits */
156	break;
157
158	case 2: /* a.b -- 8.24 bits */
159	if (val > 0xffffff)
160	return (0);
161	val \|= parts[0] << 24;
162	break;
163
164	case 3: /* a.b.c -- 8.8.16 bits */
165	if (val > 0xffff)
166	return (0);
167	val \|= (parts[0] << 24) \| (parts[1] << 16);
168	break;
169
170	case 4: /* a.b.c.d -- 8.8.8.8 bits */
171	if (val > 0xff)
172	return (0);
173	val \|= (parts[0] << 24) \| (parts[1] << 16) \| (parts[2] << 8);
174	break;
175	}
176	if (addr)
177	addr->s_addr = htonl(val);
178	return (1);
179	}
180
181	#else
182	typedef int filenotempty; /* make ISO standard happy */
183	#endif
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