mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-05 08:51:48 +00:00
199 lines
3.9 KiB
C
199 lines
3.9 KiB
C
|
/* $KAME: inet_pton.c,v 1.5 2001/08/20 02:32:40 itojun 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.
|
||
|
*/
|
||
|
|
||
|
/* Author: Paul Vixie, 1996 */
|
||
|
/* Copied from Linux, modified for Phoenix-RTOS. */
|
||
|
|
||
|
#include <arpa/inet.h>
|
||
|
#include <arpa/nameser.h>
|
||
|
#include <errno.h>
|
||
|
#include <netinet/in.h>
|
||
|
#include <string.h>
|
||
|
#include <sys/types.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 const char digits[] = "0123456789";
|
||
|
int saw_digit, octets, ch;
|
||
|
u_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) {
|
||
|
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, NS_INADDRSZ);
|
||
|
return 1;
|
||
|
}
|
||
|
|
||
|
static int inet_pton6(const char *src, u_char *dst)
|
||
|
{
|
||
|
static const char xdigits_l[] = "0123456789abcdef";
|
||
|
static const char xdigits_u[] = "0123456789ABCDEF";
|
||
|
u_char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
|
||
|
const char *xdigits, *curtok;
|
||
|
int ch, saw_xdigit;
|
||
|
u_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++ = (u_char) (val >> 8) & 0xff;
|
||
|
*tp++ = (u_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++ = (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, NS_IN6ADDRSZ);
|
||
|
return 1;
|
||
|
}
|
||
|
|
||
|
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 */
|
||
|
}
|