2 * Copyright (c) 1996,1999 by Internet Software Consortium.
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
9 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
10 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
11 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
12 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
13 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
14 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
22 #if defined(LIBC_SCCS) && !defined(lint)
23 static char rcsid[] = "$Id: inet_pton.c,v 1.3 2002/08/02 21:29:39 jmayer Exp $";
24 #endif /* LIBC_SCCS and not lint */
26 #ifdef HAVE_SYS_PARAM_H
27 #include <sys/param.h>
30 #ifdef HAVE_WINSOCK2_H
32 #define EAFNOSUPPORT WSAEAFNOSUPPORT
35 #ifdef HAVE_SYS_SOCKET_H
36 #include <sys/socket.h>
39 #ifdef HAVE_ARPA_INET_H
40 #include <arpa/inet.h>
43 #ifdef HAVE_ARPA_NAMESER_H
44 #include <arpa/nameser.h>
50 #include "inet_v6defs.h"
56 #define NS_IN6ADDRSZ 16
63 * WARNING: Don't even consider trying to compile this on a system where
64 * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.
68 static int inet_pton4 __P((const char *src, guchar *dst));
71 static int inet_pton6 __P((const char *src, guchar *dst));
75 * inet_pton(af, src, dst)
76 * convert from presentation format (which usually means ASCII printable)
77 * to network format (which is usually some kind of binary format).
79 * 1 if the address was valid for the specified address family
80 * 0 if the address wasn't valid (`dst' is untouched in this case)
81 * -1 if some other error occurred (`dst' is untouched in this case, too)
86 inet_pton(af, src, dst)
94 return (inet_pton4(src, dst));
98 return (inet_pton6(src, dst));
101 errno = EAFNOSUPPORT;
109 * inet_pton4(src, dst)
110 * like inet_aton() but without all the hexadecimal and shorthand.
112 * 1 if `src' is a valid dotted quad, else 0.
114 * does not touch `dst' unless it's returning 1.
123 static const char digits[] = "0123456789";
124 int saw_digit, octets, ch;
125 guchar tmp[NS_INADDRSZ], *tp;
130 while ((ch = *src++) != '\0') {
133 if ((pch = strchr(digits, ch)) != NULL) {
134 guint new = *tp * 10 + (pch - digits);
144 } else if (ch == '.' && saw_digit) {
154 memcpy(dst, tmp, NS_INADDRSZ);
161 * inet_pton6(src, dst)
162 * convert presentation level address to network order binary form.
164 * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
166 * (1) does not touch `dst' unless it's returning 1.
167 * (2) :: in a full address is silently ignored.
169 * inspired by Mark Andrews.
178 static const char xdigits_l[] = "0123456789abcdef",
179 xdigits_u[] = "0123456789ABCDEF";
180 guchar tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
181 const char *xdigits, *curtok;
185 memset((tp = tmp), '\0', NS_IN6ADDRSZ);
186 endp = tp + NS_IN6ADDRSZ;
188 /* Leading :: requires some special handling. */
195 while ((ch = *src++) != '\0') {
198 if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL)
199 pch = strchr((xdigits = xdigits_u), ch);
202 val |= (pch - xdigits);
215 } else if (*src == '\0') {
218 if (tp + NS_INT16SZ > endp)
220 *tp++ = (guchar) (val >> 8) & 0xff;
221 *tp++ = (guchar) val & 0xff;
226 if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
227 inet_pton4(curtok, tp) > 0) {
230 break; /* '\0' was seen by inet_pton4(). */
235 if (tp + NS_INT16SZ > endp)
237 *tp++ = (guchar) (val >> 8) & 0xff;
238 *tp++ = (guchar) val & 0xff;
240 if (colonp != NULL) {
242 * Since some memmove()'s erroneously fail to handle
243 * overlapping regions, we'll do the shift by hand.
245 const int n = tp - colonp;
250 for (i = 1; i <= n; i++) {
251 endp[- i] = colonp[n - i];
258 memcpy(dst, tmp, NS_IN6ADDRSZ);