kc3-lang/libressl/crypto/compat/inet_pton.c

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• Hash : 54545427
  Author :
  Date : 2015-06-29T22:51:40
  

  add check for inet_pton, nudge minimum win32 compat to 0x0501
  

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• crypto/compat/inet_pton.c

• /*	$OpenBSD: inet_pton.c,v 1.9 2015/01/16 16:48:51 deraadt Exp $	*/
  
  /* 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.
   */
  
  #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>
  
  /*
   * 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(const char *src, u_char *dst);
  static int	inet_pton6(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(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(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);
  			if (! saw_digit) {
  				if (++octets > 4)
  					return (0);
  				saw_digit = 1;
  			}
  			*tp = new;
  		} 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:
   *	does not touch `dst' unless it's returning 1.
   * credit:
   *	inspired by Mark Andrews.
   * author:
   *	Paul Vixie, 1996.
   */
  static int
  inet_pton6(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, count_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 = count_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) {
  			if (count_xdigit >= 4)
  				return (0);
  			val <<= 4;
  			val |= (pch - xdigits);
  			if (val > 0xffff)
  				return (0);
  			saw_xdigit = 1;
  			count_xdigit++;
  			continue;
  		}
  		if (ch == ':') {
  			curtok = src;
  			if (!saw_xdigit) {
  				if (colonp)
  					return (0);
  				colonp = tp;
  				continue;
  			} else if (*src == '\0') {
  				return (0);
  			}
  			if (tp + INT16SZ > endp)
  				return (0);
  			*tp++ = (u_char) (val >> 8) & 0xff;
  			*tp++ = (u_char) val & 0xff;
  			saw_xdigit = 0;
  			count_xdigit = 0;
  			val = 0;
  			continue;
  		}
  		if (ch == '.' && ((tp + INADDRSZ) <= endp) &&
  		    inet_pton4(curtok, tp) > 0) {
  			tp += INADDRSZ;
  			saw_xdigit = 0;
  			count_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;
  
  		if (tp == endp)
  			return (0);
  		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);
  }
  

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