]>
git.ipfire.org Git - thirdparty/squid.git/blob - lib/inet_pton.c
2 * Shamelessly duplicated from the bind9 public sources
3 * for use by the Squid Project under ISC written permission
4 * included "as found" below.
6 * Update/Maintenance History:
8 * 24-Sep-2007 : Copied from bind 9.3.3
9 * - Added protection around libray headers
10 * - Altered configure checks to import
12 * 06-Oct-2007 : Various fixes to allow the build on MinGW
14 * 28-Oct-2007: drop some dead code. now tested working without.
16 * Squid CVS $Id: inet_pton.c,v 1.1 2007/12/14 05:03:26 amosjeffries Exp $
18 * Original License and code follows.
23 #ifndef HAVE_INET_PTON
26 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
27 * Copyright (c) 1996,1999 by Internet Software Consortium.
29 * Permission to use, copy, modify, and distribute this software for any
30 * purpose with or without fee is hereby granted, provided that the above
31 * copyright notice and this permission notice appear in all copies.
33 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
34 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
35 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
36 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
37 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
38 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
39 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
42 #if defined(LIBC_SCCS) && !defined(lint)
43 static const char rcsid
[] = "inet_pton.c,v 1.2.206.2 2005/07/28 07:43:18 marka Exp";
44 #endif /* LIBC_SCCS and not lint */
47 #include <sys/param.h>
50 #include <sys/types.h>
53 #include <sys/socket.h>
56 #include <netinet/in.h>
59 #include <arpa/inet.h>
61 #if HAVE_ARPA_NAMESER_H
62 #include <arpa/nameser.h>
71 #if ! defined(NS_INADDRSZ)
74 #if ! defined(NS_IN6ADDRSZ)
75 #define NS_IN6ADDRSZ 16
77 #if ! defined(NS_INT16SZ)
82 * WARNING: Don't even consider trying to compile this on a system where
83 * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.
86 static int inet_pton4 (const char *src
, u_char
*dst
);
87 static int inet_pton6 (const char *src
, u_char
*dst
);
90 * inet_pton(af, src, dst)
91 * convert from presentation format (which usually means ASCII printable)
92 * to network format (which is usually some kind of binary format).
94 * 1 if the address was valid for the specified address family
95 * 0 if the address wasn't valid (`dst' is untouched in this case)
96 * -1 if some other error occurred (`dst' is untouched in this case, too)
101 xinet_pton(af
, src
, dst
)
108 return (inet_pton4(src
, dst
));
110 return (inet_pton6(src
, dst
));
112 errno
= EAFNOSUPPORT
;
119 * inet_pton4(src, dst)
120 * like inet_aton() but without all the hexadecimal and shorthand.
122 * 1 if `src' is a valid dotted quad, else 0.
124 * does not touch `dst' unless it's returning 1.
133 static const char digits
[] = "0123456789";
134 int saw_digit
, octets
, ch
;
135 u_char tmp
[NS_INADDRSZ
], *tp
;
140 while ((ch
= *src
++) != '\0') {
143 if ((pch
= strchr(digits
, ch
)) != NULL
) {
144 u_int
new = *tp
* 10 + (pch
- digits
);
146 if (saw_digit
&& *tp
== 0)
156 } else if (ch
== '.' && saw_digit
) {
166 memcpy(dst
, tmp
, NS_INADDRSZ
);
171 * inet_pton6(src, dst)
172 * convert presentation level address to network order binary form.
174 * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
176 * (1) does not touch `dst' unless it's returning 1.
177 * (2) :: in a full address is silently ignored.
179 * inspired by Mark Andrews.
188 static const char xdigits_l
[] = "0123456789abcdef",
189 xdigits_u
[] = "0123456789ABCDEF";
190 u_char tmp
[NS_IN6ADDRSZ
], *tp
, *endp
, *colonp
;
191 const char *xdigits
, *curtok
;
192 int ch
, seen_xdigits
;
195 memset((tp
= tmp
), '\0', NS_IN6ADDRSZ
);
196 endp
= tp
+ NS_IN6ADDRSZ
;
198 /* Leading :: requires some special handling. */
205 while ((ch
= *src
++) != '\0') {
208 if ((pch
= strchr((xdigits
= xdigits_l
), ch
)) == NULL
)
209 pch
= strchr((xdigits
= xdigits_u
), ch
);
212 val
|= (pch
- xdigits
);
213 if (++seen_xdigits
> 4)
224 } else if (*src
== '\0') {
227 if (tp
+ NS_INT16SZ
> endp
)
229 *tp
++ = (u_char
) (val
>> 8) & 0xff;
230 *tp
++ = (u_char
) val
& 0xff;
235 if (ch
== '.' && ((tp
+ NS_INADDRSZ
) <= endp
) &&
236 inet_pton4(curtok
, tp
) > 0) {
239 break; /* '\0' was seen by inet_pton4(). */
244 if (tp
+ NS_INT16SZ
> endp
)
246 *tp
++ = (u_char
) (val
>> 8) & 0xff;
247 *tp
++ = (u_char
) val
& 0xff;
249 if (colonp
!= NULL
) {
251 * Since some memmove()'s erroneously fail to handle
252 * overlapping regions, we'll do the shift by hand.
254 const int n
= tp
- colonp
;
259 for (i
= 1; i
<= n
; i
++) {
260 endp
[- i
] = colonp
[n
- i
];
267 memcpy(dst
, tmp
, NS_IN6ADDRSZ
);
271 #endif /* HAVE_INET_PTON */