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 "system/network.h"
23 #define NS_IN6ADDRSZ 16
26 * WARNING: Don't even consider trying to compile this on a system where
27 * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.
30 static int inet_pton4(const char *src, unsigned char *dst);
32 static int inet_pton6(const char *src, unsigned char *dst);
36 * inet_pton(af, src, dst)
37 * convert from presentation format (which usually means ASCII printable)
38 * to network format (which is usually some kind of binary format).
40 * 1 if the address was valid for the specified address family
41 * 0 if the address wasn't valid (`dst' is untouched in this case)
42 * -1 if some other error occurred (`dst' is untouched in this case, too)
53 return (inet_pton4(src, dst));
56 return (inet_pton6(src, dst));
66 * inet_pton4(src, dst)
67 * like inet_aton() but without all the hexadecimal and shorthand.
69 * 1 if `src' is a valid dotted quad, else 0.
71 * does not touch `dst' unless it's returning 1.
80 static const char digits[] = "0123456789";
81 int saw_digit, octets, ch;
82 unsigned char tmp[NS_INADDRSZ], *tp;
87 while ((ch = *src++) != '\0') {
90 if ((pch = strchr(digits, ch)) != NULL) {
91 unsigned int new = *tp * 10 + (pch - digits);
101 } else if (ch == '.' && saw_digit) {
111 memcpy(dst, tmp, NS_INADDRSZ);
116 * inet_pton6(src, dst)
117 * convert presentation level address to network order binary form.
119 * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
121 * (1) does not touch `dst' unless it's returning 1.
122 * (2) :: in a full address is silently ignored.
124 * inspired by Mark Andrews.
134 static const char xdigits_l[] = "0123456789abcdef",
135 xdigits_u[] = "0123456789ABCDEF";
136 unsigned char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
137 const char *xdigits, *curtok;
141 memset((tp = tmp), '\0', NS_IN6ADDRSZ);
142 endp = tp + NS_IN6ADDRSZ;
144 /* Leading :: requires some special handling. */
151 while ((ch = *src++) != '\0') {
154 if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL)
155 pch = strchr((xdigits = xdigits_u), ch);
158 val |= (pch - xdigits);
172 if (tp + NS_INT16SZ > endp)
174 *tp++ = (unsigned char) (val >> 8) & 0xff;
175 *tp++ = (unsigned char) val & 0xff;
180 if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
181 inet_pton4(curtok, tp) > 0) {
184 break; /* '\0' was seen by inet_pton4(). */
189 if (tp + NS_INT16SZ > endp)
191 *tp++ = (unsigned char) (val >> 8) & 0xff;
192 *tp++ = (unsigned char) val & 0xff;
194 if (colonp != NULL) {
196 * Since some memmove()'s erroneously fail to handle
197 * overlapping regions, we'll do the shift by hand.
199 const int n = tp - colonp;
202 for (i = 1; i <= n; i++) {
203 endp[- i] = colonp[n - i];
210 memcpy(dst, tmp, NS_IN6ADDRSZ);