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#include "inet_aton.h"
#ifdef __cplusplus
extern "C" {
#endif
/*
* Copyright (C) 1996-2001 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.
*/
#ifndef HAVE_INET_PTON
#define NS_INT16SZ 2
#define NS_INADDRSZ 4
#define NS_IN6ADDRSZ 16
/* int
* isc_net_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)
* author:
* Paul Vixie, 1996.
*/
int
inet_pton(int af,
const char *src,
void *dst) {
switch ( af ) {
case AF_INET:
return(inet_pton4(src, dst));
#if HAVE_IPV6
case AF_INET6:
return(inet_pton6(src, dst));
#endif
default:
return 0;
}
/* 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.
*/
int
inet_pton4(src, dst)
const char *src;
unsigned char *dst;
{
static const char digits[] = "0123456789";
int saw_digit, octets, ch;
unsigned char tmp[NS_INADDRSZ], *tp;
saw_digit = 0;
octets = 0;
*(tp = tmp) = 0;
while ( (ch = *src++) != '\0' ) {
const char *pch;
if ( (pch = strchr(digits, ch)) != NULL ) {
unsigned 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, NS_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.
*/
#if HAVE_IPV6
int
inet_pton6(src, dst)
const char *src;
unsigned char *dst;
{
static const char xdigits_l[] = "0123456789abcdef",
xdigits_u[] = "0123456789ABCDEF";
unsigned char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
const char *xdigits, *curtok;
int ch, saw_xdigit;
unsigned int val;
memset((tp = tmp), '\0', NS_IN6ADDRSZ);
endp = tp + NS_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 + NS_INT16SZ > endp )
return(0);
*tp++ = (unsigned char) (val >> 8) & 0xff;
*tp++ = (unsigned char) val & 0xff;
saw_xdigit = 0;
val = 0;
continue;
}
if ( ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
inet_pton4(curtok, tp) > 0 ) {
tp += NS_INADDRSZ;
saw_xdigit = 0;
break; /* '\0' was seen by inet_pton4(). */
}
return(0);
}
if ( saw_xdigit ) {
if ( tp + NS_INT16SZ > endp )
return(0);
*tp++ = (unsigned char) (val >> 8) & 0xff;
*tp++ = (unsigned 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, NS_IN6ADDRSZ);
return(1);
}
#endif
#endif /* HAVE_INET_PTON */
#ifdef __cplusplus
} /* end extern "C" */
#endif
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