1 /* This is from the BIND 4.9.4 release, modified to compile by itself */
3 /* Copyright (c) 1996 by Internet Software Consortium.
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
10 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
11 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
12 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
13 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
14 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
15 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
21 #ifndef HAVE_INET_PTON
23 #ifdef HAVE_SYS_PARAM_H
24 #include <sys/param.h>
26 #ifdef HAVE_SYS_SOCKET_H
27 #include <sys/socket.h>
29 #ifdef HAVE_NETINET_IN_H
30 #include <netinet/in.h>
32 #ifdef HAVE_ARPA_INET_H
33 #include <arpa/inet.h>
38 #include "inet_pton.h"
45 * WARNING: Don't even consider trying to compile this on a system where
46 * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.
49 static int inet_pton4(const char *src, unsigned char *dst);
51 static int inet_pton6(const char *src, unsigned char *dst);
55 * inet_pton(af, src, dst)
56 * convert from presentation format (which usually means ASCII printable)
57 * to network format (which is usually some kind of binary format).
59 * 1 if the address was valid for the specified address family
60 * 0 if the address wasn't valid (`dst' is untouched in this case)
61 * -1 if some other error occurred (`dst' is untouched in this case, too)
63 * On Windows we store the error in the thread errno, not
64 * in the winsock error code. This is to avoid loosing the
65 * actual last winsock error. So use macro ERRNO to fetch the
66 * errno this funtion sets when returning (-1), not SOCKERRNO.
71 Curl_inet_pton(int af, const char *src, void *dst)
75 return (inet_pton4(src, (unsigned char *)dst));
78 return (inet_pton6(src, (unsigned char *)dst));
81 SET_ERRNO(EAFNOSUPPORT);
88 * inet_pton4(src, dst)
89 * like inet_aton() but without all the hexadecimal and shorthand.
91 * 1 if `src' is a valid dotted quad, else 0.
93 * does not touch `dst' unless it's returning 1.
98 inet_pton4(const char *src, unsigned char *dst)
100 static const char digits[] = "0123456789";
101 int saw_digit, octets, ch;
102 unsigned char tmp[INADDRSZ], *tp;
108 while((ch = *src++) != '\0') {
111 if((pch = strchr(digits, ch)) != NULL) {
112 unsigned int val = *tp * 10 + (unsigned int)(pch - digits);
114 if(saw_digit && *tp == 0)
118 *tp = (unsigned char)val;
125 else if(ch == '.' && saw_digit) {
136 memcpy(dst, tmp, INADDRSZ);
142 * inet_pton6(src, dst)
143 * convert presentation level address to network order binary form.
145 * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
147 * (1) does not touch `dst' unless it's returning 1.
148 * (2) :: in a full address is silently ignored.
150 * inspired by Mark Andrews.
155 inet_pton6(const char *src, unsigned char *dst)
157 static const char xdigits_l[] = "0123456789abcdef",
158 xdigits_u[] = "0123456789ABCDEF";
159 unsigned char tmp[IN6ADDRSZ], *tp, *endp, *colonp;
160 const char *xdigits, *curtok;
164 memset((tp = tmp), 0, IN6ADDRSZ);
165 endp = tp + IN6ADDRSZ;
167 /* Leading :: requires some special handling. */
174 while((ch = *src++) != '\0') {
177 if((pch = strchr((xdigits = xdigits_l), ch)) == NULL)
178 pch = strchr((xdigits = xdigits_u), ch);
181 val |= (pch - xdigits);
194 if(tp + INT16SZ > endp)
196 *tp++ = (unsigned char) (val >> 8) & 0xff;
197 *tp++ = (unsigned char) val & 0xff;
202 if(ch == '.' && ((tp + INADDRSZ) <= endp) &&
203 inet_pton4(curtok, tp) > 0) {
206 break; /* '\0' was seen by inet_pton4(). */
211 if(tp + INT16SZ > endp)
213 *tp++ = (unsigned char) (val >> 8) & 0xff;
214 *tp++ = (unsigned char) val & 0xff;
218 * Since some memmove()'s erroneously fail to handle
219 * overlapping regions, we'll do the shift by hand.
221 const ssize_t n = tp - colonp;
226 for (i = 1; i <= n; i++) {
227 *(endp - i) = *(colonp + n - i);
228 *(colonp + n - i) = 0;
234 memcpy(dst, tmp, IN6ADDRSZ);
237 #endif /* ENABLE_IPV6 */
239 #endif /* HAVE_INET_PTON */