2 * Copyright (C) 1996-2001 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
9 * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
10 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
11 * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
13 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
14 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
15 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 #include <sys/types.h>
20 #include <sys/socket.h>
21 #include <sys/socket.h>
22 #include <netinet/in.h>
23 #include <arpa/inet.h>
36 #define NS_IN6ADDRSZ 16
40 * WARNING: Don't even consider trying to compile this on a system where
41 * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.
44 static int inet_pton4(const char *src, unsigned char *dst);
45 static int inet_pton6(const char *src, unsigned char *dst);
48 * inet_pton4(src, dst)
49 * like inet_aton() but without all the hexadecimal and shorthand.
51 * 1 if `src' is a valid dotted quad, else 0.
53 * does not touch `dst' unless it's returning 1.
58 inet_pton4(const char *src, unsigned char *dst)
60 static const char digits[] = "0123456789";
61 int saw_digit, octets, ch;
62 unsigned char tmp[NS_INADDRSZ], *tp;
67 while ((ch = *src++) != '\0') {
70 if ((pch = strchr(digits, ch)) != NULL) {
71 unsigned int new = *tp * 10 + (pch - digits);
81 } else if (ch == '.' && saw_digit) {
91 memcpy(dst, tmp, NS_INADDRSZ);
96 * inet_pton6(src, dst)
97 * convert presentation level address to network order binary form.
99 * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
101 * (1) does not touch `dst' unless it's returning 1.
102 * (2) :: in a full address is silently ignored.
104 * inspired by Mark Andrews.
111 inet_pton6(const char *src, unsigned char *dst)
113 static const char xdigits_l[] = "0123456789abcdef",
114 xdigits_u[] = "0123456789ABCDEF";
115 unsigned char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
116 const char *xdigits, *curtok;
120 memset((tp = tmp), '\0', NS_IN6ADDRSZ);
121 endp = tp + NS_IN6ADDRSZ;
123 /* Leading :: requires some special handling. */
130 while ((ch = *src++) != '\0') {
133 if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL)
134 pch = strchr((xdigits = xdigits_u), ch);
137 val |= (pch - xdigits);
151 if (tp + NS_INT16SZ > endp)
153 *tp++ = (unsigned char) (val >> 8) & 0xff;
154 *tp++ = (unsigned char) val & 0xff;
159 if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
160 inet_pton4(curtok, tp) > 0) {
163 break; /* '\0' was seen by inet_pton4(). */
168 if (tp + NS_INT16SZ > endp)
170 *tp++ = (unsigned char) (val >> 8) & 0xff;
171 *tp++ = (unsigned char) val & 0xff;
173 if (colonp != NULL) {
175 * Since some memmove()'s erroneously fail to handle
176 * overlapping regions, we'll do the shift by hand.
178 const int n = tp - colonp;
181 for (i = 1; i <= n; i++) {
182 endp[- i] = colonp[n - i];
189 memcpy(dst, tmp, NS_IN6ADDRSZ);
195 * isc_net_pton(af, src, dst)
196 * convert from presentation format (which usually means ASCII printable)
197 * to network format (which is usually some kind of binary format).
199 * 1 if the address was valid for the specified address family
200 * 0 if the address wasn't valid (`dst' is untouched in this case)
201 * -1 if some other error occurred (`dst' is untouched in this case, too)
206 inet_pton(int af, const char *src, void *dst)
210 return (inet_pton4(src, dst));
213 return (inet_pton6(src, dst));
216 errno = EAFNOSUPPORT;