Delete: lib/inet_pton.c

}(Logical change 1.33)

lib/inet_pton.c

-/* Copyright (c) 1996 by Internet Software Consortium.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
- * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
- * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
- * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
- * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- * SOFTWARE.
- */
-
-#if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$Id: inet_pton.c,v 1.5 1996/09/27 03:24:16 drepper Exp $";
-#endif /* LIBC_SCCS and not lint */
-
-#include <sys/param.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <arpa/nameser.h>
-#include <string.h>
-#include <errno.h>
-
-#include <linux/in6.h>
-#define IN6ADDRSZ sizeof(struct in6_addr)
-
-/*
- * WARNING: Don't even consider trying to compile this on a system where
- * sizeof(int) < 4.  sizeof(int) > 4 is fine; all the world's not a VAX.
- */
-
-static int	inet_pton4 __P((const char *src, u_char *dst));
-static int	inet_pton6 __P((const char *src, u_char *dst));
-
-/* int
- * inet_pton(af, src, dst)
- *	convert from presentation format (which usually means ASCII printable)
- *	to network format (which is usually some kind of binary format).
- * return:
- *	1 if the address was valid for the specified address family
- *	0 if the address wasn't valid (`dst' is untouched in this case)
- *	-1 if some other error occurred (`dst' is untouched in this case, too)
- * author:
- *	Paul Vixie, 1996.
- */
-int
-inet_pton(af, src, dst)
-	int af;
-	const char *src;
-	void *dst;
-{
-	switch (af) {
-	case AF_INET:
-		return (inet_pton4(src, dst));
-	case AF_INET6:
-		return (inet_pton6(src, dst));
-	default:
-		errno = EAFNOSUPPORT;
-		return (-1);
-	}
-	/* NOTREACHED */
-}
-
-/* int
- * inet_pton4(src, dst)
- *	like inet_aton() but without all the hexadecimal and shorthand.
- * return:
- *	1 if `src' is a valid dotted quad, else 0.
- * notice:
- *	does not touch `dst' unless it's returning 1.
- * author:
- *	Paul Vixie, 1996.
- */
-static int
-inet_pton4(src, dst)
-	const char *src;
-	u_char *dst;
-{
-	static const char digits[] = "0123456789";
-	int saw_digit, octets, ch;
-	u_char tmp[INADDRSZ], *tp;
-
-	saw_digit = 0;
-	octets = 0;
-	*(tp = tmp) = 0;
-	while ((ch = *src++) != '\0') {
-		const char *pch;
-
-		if ((pch = strchr(digits, ch)) != NULL) {
-			u_int new = *tp * 10 + (pch - digits);
-
-			if (new > 255)
-				return (0);
-			*tp = new;
-			if (! saw_digit) {
-				if (++octets > 4)
-					return (0);
-				saw_digit = 1;
-			}
-		} else if (ch == '.' && saw_digit) {
-			if (octets == 4)
-				return (0);
-			*++tp = 0;
-			saw_digit = 0;
-		} else
-			return (0);
-	}
-	if (octets < 4)
-		return (0);
-
-	memcpy(dst, tmp, INADDRSZ);
-	return (1);
-}
-
-/* int
- * inet_pton6(src, dst)
- *	convert presentation level address to network order binary form.
- * return:
- *	1 if `src' is a valid [RFC1884 2.2] address, else 0.
- * notice:
- *	(1) does not touch `dst' unless it's returning 1.
- *	(2) :: in a full address is silently ignored.
- * credit:
- *	inspired by Mark Andrews.
- * author:
- *	Paul Vixie, 1996.
- */
-static int
-inet_pton6(src, dst)
-	const char *src;
-	u_char *dst;
-{
-	static const char xdigits_l[] = "0123456789abcdef",
-			  xdigits_u[] = "0123456789ABCDEF";
-	u_char tmp[IN6ADDRSZ], *tp, *endp, *colonp;
-	const char *xdigits, *curtok;
-	int ch, saw_xdigit;
-	u_int val;
-
-	memset((tp = tmp), '\0', IN6ADDRSZ);
-	endp = tp + IN6ADDRSZ;
-	colonp = NULL;
-	/* Leading :: requires some special handling. */
-	if (*src == ':')
-		if (*++src != ':')
-			return (0);
-	curtok = src;
-	saw_xdigit = 0;
-	val = 0;
-	while ((ch = *src++) != '\0') {
-		const char *pch;
-
-		if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL)
-			pch = strchr((xdigits = xdigits_u), ch);
-		if (pch != NULL) {
-			val <<= 4;
-			val |= (pch - xdigits);
-			if (val > 0xffff)
-				return (0);
-			saw_xdigit = 1;
-			continue;
-		}
-		if (ch == ':') {
-			curtok = src;
-			if (!saw_xdigit) {
-				if (colonp)
-					return (0);
-				colonp = tp;
-				continue;
-			}
-			if (tp + INT16SZ > endp)
-				return (0);
-			*tp++ = (u_char) (val >> 8) & 0xff;
-			*tp++ = (u_char) val & 0xff;
-			saw_xdigit = 0;
-			val = 0;
-			continue;
-		}
-		if (ch == '.' && ((tp + INADDRSZ) <= endp) &&
-		    inet_pton4(curtok, tp) > 0) {
-			tp += INADDRSZ;
-			saw_xdigit = 0;
-			break;	/* '\0' was seen by inet_pton4(). */
-		}
-		return (0);
-	}
-	if (saw_xdigit) {
-		if (tp + INT16SZ > endp)
-			return (0);
-		*tp++ = (u_char) (val >> 8) & 0xff;
-		*tp++ = (u_char) val & 0xff;
-	}
-	if (colonp != NULL) {
-		/*
-		 * Since some memmove()'s erroneously fail to handle
-		 * overlapping regions, we'll do the shift by hand.
-		 */
-		const int n = tp - colonp;
-		int i;
-
-		for (i = 1; i <= n; i++) {
-			endp[- i] = colonp[n - i];
-			colonp[n - i] = 0;
-		}
-		tp = endp;
-	}
-	if (tp != endp)
-		return (0);
-	memcpy(dst, tmp, IN6ADDRSZ);
-	return (1);
-}