inet_pton.c revision 0c27b3fe77ac1d5094ba3521e8142d9e7973133f
/*
* Copyright (C) 1996-2005, 2007, 2013, 2014, 2016 Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
/*! \file */
static char rcsid[] =
"$Id: inet_pton.c,v 1.19 2007/06/19 23:47:17 tbox Exp $";
#endif /* LIBC_SCCS and not lint */
#include <config.h>
#include <errno.h>
#include <string.h>
/*% INT16 Size */
#define NS_INT16SZ 2
/*% IPv4 Address Size */
#define NS_INADDRSZ 4
/*% IPv6 Address Size */
#define NS_IN6ADDRSZ 16
/*
* 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.
*/
/*%
* 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
switch (af) {
case AF_INET:
case AF_INET6:
default:
return (-1);
}
/* NOTREACHED */
}
/*!\fn static int inet_pton4(const char *src, unsigned char *dst)
* \brief
* like inet_aton() but without all the hexadecimal and shorthand.
* \return
* 1 if `src' is a valid dotted quad, else 0.
* \note
* does not touch `dst' unless it's returning 1.
* \author
* Paul Vixie, 1996.
*/
static int
static const char digits[] = "0123456789";
saw_digit = 0;
octets = 0;
const char *pch;
return (0);
if (new > 255)
return (0);
if (!saw_digit) {
if (++octets > 4)
return (0);
saw_digit = 1;
}
if (octets == 4)
return (0);
*++tp = 0;
saw_digit = 0;
} else
return (0);
}
if (octets < 4)
return (0);
return (1);
}
/*%
* convert presentation level address to network order binary form.
* \return
* 1 if `src' is a valid [RFC1884 2.2] address, else 0.
* \note
* (1) does not touch `dst' unless it's returning 1.
* \note
* (2) :: in a full address is silently ignored.
* \author
* inspired by Mark Andrews.
* \author
* Paul Vixie, 1996.
*/
static int
static const char xdigits_l[] = "0123456789abcdef",
xdigits_u[] = "0123456789ABCDEF";
int ch, seen_xdigits;
unsigned int val;
/* Leading :: requires some special handling. */
if (*src == ':')
if (*++src != ':')
return (0);
seen_xdigits = 0;
val = 0;
const char *pch;
val <<= 4;
if (++seen_xdigits > 4)
return (0);
continue;
}
if (ch == ':') {
if (!seen_xdigits) {
if (colonp)
return (0);
continue;
}
return (0);
seen_xdigits = 0;
val = 0;
continue;
}
tp += NS_INADDRSZ;
seen_xdigits = 0;
break; /* '\0' was seen by inet_pton4(). */
}
return (0);
}
if (seen_xdigits) {
return (0);
}
/*
* Since some memmove()'s erroneously fail to handle
* overlapping regions, we'll do the shift by hand.
*/
int i;
return (0);
for (i = 1; i <= n; i++) {
colonp[n - i] = 0;
}
}
return (0);
return (1);
}