221 lines
6.9 KiB
C
221 lines
6.9 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#ifndef NS_INT16SZ
|
|
#define NS_INT16SZ 2
|
|
#endif
|
|
|
|
#ifndef NS_INADDRSZ
|
|
#define NS_INADDRSZ 4
|
|
#endif
|
|
|
|
#ifndef NS_IN6ADDRSZ
|
|
#define NS_IN6ADDRSZ 16
|
|
#endif
|
|
|
|
/*
|
|
* 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, unsigned char *dst);
|
|
static int inet_pton6(const char *src, unsigned char *dst);
|
|
|
|
/* 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, 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.
|
|
*/
|
|
|
|
#ifndef NO_IPV6
|
|
static int
|
|
inet_pton6(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
|
|
|
|
/* 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)
|
|
* -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));
|
|
#ifndef NO_IPV6
|
|
case AF_INET6:
|
|
return (inet_pton6(src, dst));
|
|
#endif
|
|
default:
|
|
errno = EAFNOSUPPORT;
|
|
return (-1);
|
|
}
|
|
/* NOTREACHED */
|
|
}
|