7 * Copyright (C) 1996-2001 Internet Software Consortium.
9 * Permission to use, copy, modify, and distribute this software for any
10 * purpose with or without fee is hereby granted, provided that the above
11 * copyright notice and this permission notice appear in all copies.
13 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
14 * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
16 * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
17 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
18 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
19 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
20 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 #ifndef HAVE_INET_PTON
26 #define NS_IN6ADDRSZ 16
29 * isc_net_pton(af, src, dst)
30 * convert from presentation format (which usually means ASCII printable)
31 * to network format (which is usually some kind of binary format).
33 * 1 if the address was valid for the specified address family
34 * 0 if the address wasn't valid (`dst' is untouched in this case)
44 return(inet_pton4(src, dst));
47 return(inet_pton6(src, dst));
56 * inet_pton4(src, dst)
57 * like inet_aton() but without all the hexadecimal and shorthand.
59 * 1 if `src' is a valid dotted quad, else 0.
61 * does not touch `dst' unless it's returning 1.
70 static const char digits[] = "0123456789";
71 int saw_digit, octets, ch;
72 unsigned char tmp[NS_INADDRSZ], *tp;
77 while ( (ch = *src++) != '\0' ) {
80 if ( (pch = strchr(digits, ch)) != NULL ) {
81 unsigned int new = *tp * 10 + (pch - digits);
91 } else if ( ch == '.' && saw_digit ) {
101 memcpy(dst, tmp, NS_INADDRSZ);
106 * inet_pton6(src, dst)
107 * convert presentation level address to network order binary form.
109 * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
111 * (1) does not touch `dst' unless it's returning 1.
112 * (2) :: in a full address is silently ignored.
114 * inspired by Mark Andrews.
124 static const char xdigits_l[] = "0123456789abcdef",
125 xdigits_u[] = "0123456789ABCDEF";
126 unsigned char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
127 const char *xdigits, *curtok;
131 memset((tp = tmp), '\0', NS_IN6ADDRSZ);
132 endp = tp + NS_IN6ADDRSZ;
134 /* Leading :: requires some special handling. */
141 while ( (ch = *src++) != '\0' ) {
144 if ( (pch = strchr((xdigits = xdigits_l), ch)) == NULL )
145 pch = strchr((xdigits = xdigits_u), ch);
148 val |= (pch - xdigits);
162 if ( tp + NS_INT16SZ > endp )
164 *tp++ = (unsigned char) (val >> 8) & 0xff;
165 *tp++ = (unsigned char) val & 0xff;
170 if ( ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
171 inet_pton4(curtok, tp) > 0 ) {
174 break; /* '\0' was seen by inet_pton4(). */
179 if ( tp + NS_INT16SZ > endp )
181 *tp++ = (unsigned char) (val >> 8) & 0xff;
182 *tp++ = (unsigned char) val & 0xff;
184 if ( colonp != NULL ) {
186 * Since some memmove()'s erroneously fail to handle
187 * overlapping regions, we'll do the shift by hand.
189 const int n = tp - colonp;
192 for ( i = 1; i <= n; i++ ) {
193 endp[- i] = colonp[n - i];
200 memcpy(dst, tmp, NS_IN6ADDRSZ);
205 #endif /* HAVE_INET_PTON */
208 } /* end extern "C" */