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 2000/01/10 17:32:51 gram Exp $";
24 #endif /* LIBC_SCCS and not lint */
26 #ifdef HAVE_SYS_PARAM_H
27 #include <sys/param.h>
30 #include <sys/types.h>
34 #define EAFNOSUPPORT WSAEAFNOSUPPORT
37 #ifdef HAVE_SYS_SOCKET_H
38 #include <sys/socket.h>
41 #ifdef HAVE_NETINET_IN_H
42 #include <netinet/in.h>
45 #ifdef HAVE_ARPA_INET_H
46 #include <arpa/inet.h>
49 #ifdef HAVE_ARPA_NAMESER_H
50 #include <arpa/nameser.h>
56 #include "inet_v6defs.h"
62 #define NS_IN6ADDRSZ 16
69 * WARNING: Don't even consider trying to compile this on a system where
70 * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.
74 static int inet_pton4 __P((const char *src, u_char *dst));
77 static int inet_pton6 __P((const char *src, u_char *dst));
81 * inet_pton(af, src, dst)
82 * convert from presentation format (which usually means ASCII printable)
83 * to network format (which is usually some kind of binary format).
85 * 1 if the address was valid for the specified address family
86 * 0 if the address wasn't valid (`dst' is untouched in this case)
87 * -1 if some other error occurred (`dst' is untouched in this case, too)
92 inet_pton(af, src, dst)
100 return (inet_pton4(src, dst));
104 return (inet_pton6(src, dst));
107 errno = EAFNOSUPPORT;
115 * inet_pton4(src, dst)
116 * like inet_aton() but without all the hexadecimal and shorthand.
118 * 1 if `src' is a valid dotted quad, else 0.
120 * does not touch `dst' unless it's returning 1.
129 static const char digits[] = "0123456789";
130 int saw_digit, octets, ch;
131 u_char tmp[NS_INADDRSZ], *tp;
136 while ((ch = *src++) != '\0') {
139 if ((pch = strchr(digits, ch)) != NULL) {
140 u_int new = *tp * 10 + (pch - digits);
150 } else if (ch == '.' && saw_digit) {
160 memcpy(dst, tmp, NS_INADDRSZ);
167 * inet_pton6(src, dst)
168 * convert presentation level address to network order binary form.
170 * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
172 * (1) does not touch `dst' unless it's returning 1.
173 * (2) :: in a full address is silently ignored.
175 * inspired by Mark Andrews.
184 static const char xdigits_l[] = "0123456789abcdef",
185 xdigits_u[] = "0123456789ABCDEF";
186 u_char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
187 const char *xdigits, *curtok;
191 memset((tp = tmp), '\0', NS_IN6ADDRSZ);
192 endp = tp + NS_IN6ADDRSZ;
194 /* Leading :: requires some special handling. */
201 while ((ch = *src++) != '\0') {
204 if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL)
205 pch = strchr((xdigits = xdigits_u), ch);
208 val |= (pch - xdigits);
221 } else if (*src == '\0') {
224 if (tp + NS_INT16SZ > endp)
226 *tp++ = (u_char) (val >> 8) & 0xff;
227 *tp++ = (u_char) val & 0xff;
232 if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
233 inet_pton4(curtok, tp) > 0) {
236 break; /* '\0' was seen by inet_pton4(). */
241 if (tp + NS_INT16SZ > endp)
243 *tp++ = (u_char) (val >> 8) & 0xff;
244 *tp++ = (u_char) val & 0xff;
246 if (colonp != NULL) {
248 * Since some memmove()'s erroneously fail to handle
249 * overlapping regions, we'll do the shift by hand.
251 const int n = tp - colonp;
256 for (i = 1; i <= n; i++) {
257 endp[- i] = colonp[n - i];
264 memcpy(dst, tmp, NS_IN6ADDRSZ);