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
19 #include "curl_setup.h"
21 #ifndef HAVE_INET_PTON
23 #ifdef HAVE_SYS_PARAM_H
24 #include <sys/param.h>
26 #ifdef HAVE_NETINET_IN_H
27 #include <netinet/in.h>
29 #ifdef HAVE_ARPA_INET_H
30 #include <arpa/inet.h>
33 #include "inet_pton.h"
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);
46 static int inet_pton6(const char *src, unsigned char *dst);
50 * inet_pton(af, src, dst)
51 * convert from presentation format (which usually means ASCII printable)
52 * to network format (which is usually some kind of binary format).
54 * 1 if the address was valid for the specified address family
55 * 0 if the address wasn't valid (`dst' is untouched in this case)
56 * -1 if some other error occurred (`dst' is untouched in this case, too)
58 * On Windows we store the error in the thread errno, not
59 * in the winsock error code. This is to avoid losing the
60 * actual last winsock error. So use macro ERRNO to fetch the
61 * errno this function sets when returning (-1), not SOCKERRNO.
66 Curl_inet_pton(int af, const char *src, void *dst)
70 return (inet_pton4(src, (unsigned char *)dst));
73 return (inet_pton6(src, (unsigned char *)dst));
76 SET_ERRNO(EAFNOSUPPORT);
83 * inet_pton4(src, dst)
84 * like inet_aton() but without all the hexadecimal and shorthand.
86 * 1 if `src' is a valid dotted quad, else 0.
88 * does not touch `dst' unless it's returning 1.
93 inet_pton4(const char *src, unsigned char *dst)
95 static const char digits[] = "0123456789";
96 int saw_digit, octets, ch;
97 unsigned char tmp[INADDRSZ], *tp;
103 while((ch = *src++) != '\0') {
106 pch = strchr(digits, ch);
108 unsigned int val = *tp * 10 + (unsigned int)(pch - digits);
110 if(saw_digit && *tp == 0)
114 *tp = (unsigned char)val;
121 else if(ch == '.' && saw_digit) {
132 memcpy(dst, tmp, INADDRSZ);
138 * inet_pton6(src, dst)
139 * convert presentation level address to network order binary form.
141 * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
143 * (1) does not touch `dst' unless it's returning 1.
144 * (2) :: in a full address is silently ignored.
146 * inspired by Mark Andrews.
151 inet_pton6(const char *src, unsigned char *dst)
153 static const char xdigits_l[] = "0123456789abcdef",
154 xdigits_u[] = "0123456789ABCDEF";
155 unsigned char tmp[IN6ADDRSZ], *tp, *endp, *colonp;
156 const char *xdigits, *curtok;
160 memset((tp = tmp), 0, IN6ADDRSZ);
161 endp = tp + IN6ADDRSZ;
163 /* Leading :: requires some special handling. */
170 while((ch = *src++) != '\0') {
173 pch = strchr((xdigits = xdigits_l), ch);
175 pch = strchr((xdigits = xdigits_u), ch);
178 val |= (pch - xdigits);
191 if(tp + INT16SZ > endp)
193 *tp++ = (unsigned char) ((val >> 8) & 0xff);
194 *tp++ = (unsigned char) (val & 0xff);
199 if(ch == '.' && ((tp + INADDRSZ) <= endp) &&
200 inet_pton4(curtok, tp) > 0) {
203 break; /* '\0' was seen by inet_pton4(). */
208 if(tp + INT16SZ > endp)
210 *tp++ = (unsigned char) ((val >> 8) & 0xff);
211 *tp++ = (unsigned char) (val & 0xff);
215 * Since some memmove()'s erroneously fail to handle
216 * overlapping regions, we'll do the shift by hand.
218 const ssize_t n = tp - colonp;
223 for(i = 1; i <= n; i++) {
224 *(endp - i) = *(colonp + n - i);
225 *(colonp + n - i) = 0;
231 memcpy(dst, tmp, IN6ADDRSZ);
234 #endif /* ENABLE_IPV6 */
236 #endif /* HAVE_INET_PTON */