minix/lib/libc/inet/inet_pton.c
Lionel Sambuc f14fb60209 Libraries updates and cleanup
* Updating common/lib
 * Updating lib/csu
 * Updating lib/libc
 * Updating libexec/ld.elf_so
 * Corrected test on __minix in featuretest to actually follow the
   meaning of the comment.
 * Cleaned up _REENTRANT-related defintions.
 * Disabled -D_REENTRANT for libfetch
 * Removing some unneeded __NBSD_LIBC defines and tests

Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
2013-01-14 11:36:26 +01:00

310 lines
7.2 KiB
C

/* $NetBSD: inet_pton.c,v 1.8 2012/03/13 21:13:38 christos Exp $ */
/*
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* Copyright (c) 1996,1999 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 ISC DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static const char rcsid[] = "Id: inet_pton.c,v 1.5 2005/07/28 06:51:47 marka Exp";
#else
__RCSID("$NetBSD: inet_pton.c,v 1.8 2012/03/13 21:13:38 christos Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
#include "port_before.h"
#include "namespace.h"
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <stddef.h>
#include <string.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include "port_after.h"
#ifdef __weak_alias
__weak_alias(inet_pton,_inet_pton)
#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, u_char *dst, int pton);
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)
{
_DIAGASSERT(src != NULL);
_DIAGASSERT(dst != NULL);
switch (af) {
case AF_INET:
return (inet_pton4(src, dst, 1));
case AF_INET6:
return (inet_pton6(src, dst));
default:
errno = EAFNOSUPPORT;
return (-1);
}
/* NOTREACHED */
}
/* int
* inet_pton4(src, dst, pton)
* when last arg is 0: inet_aton(). with hexadecimal, octal and shorthand.
* when last arg is 1: inet_pton(). decimal dotted-quad only.
* return:
* 1 if `src' is a valid input, 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, int pton)
{
u_int32_t val;
u_int digit, base;
ptrdiff_t n;
unsigned char c;
u_int parts[4];
u_int *pp = parts;
_DIAGASSERT(src != NULL);
_DIAGASSERT(dst != NULL);
c = *src;
for (;;) {
/*
* Collect number up to ``.''.
* Values are specified as for C:
* 0x=hex, 0=octal, isdigit=decimal.
*/
if (!isdigit(c))
return (0);
val = 0; base = 10;
if (c == '0') {
c = *++src;
if (c == 'x' || c == 'X')
base = 16, c = *++src;
else if (isdigit(c) && c != '9')
base = 8;
}
/* inet_pton() takes decimal only */
if (pton && base != 10)
return (0);
for (;;) {
if (isdigit(c)) {
digit = c - '0';
if (digit >= base)
break;
val = (val * base) + digit;
c = *++src;
} else if (base == 16 && isxdigit(c)) {
digit = c + 10 - (islower(c) ? 'a' : 'A');
if (digit >= 16)
break;
val = (val << 4) | digit;
c = *++src;
} else
break;
}
if (c == '.') {
/*
* Internet format:
* a.b.c.d
* a.b.c (with c treated as 16 bits)
* a.b (with b treated as 24 bits)
* a (with a treated as 32 bits)
*/
if (pp >= parts + 3)
return (0);
*pp++ = val;
c = *++src;
} else
break;
}
/*
* Check for trailing characters.
*/
if (c != '\0' && !isspace(c))
return (0);
/*
* Concoct the address according to
* the number of parts specified.
*/
n = pp - parts + 1;
/* inet_pton() takes dotted-quad only. it does not take shorthand. */
if (pton && n != 4)
return (0);
switch (n) {
case 0:
return (0); /* initial nondigit */
case 1: /* a -- 32 bits */
break;
case 2: /* a.b -- 8.24 bits */
if (parts[0] > 0xff || val > 0xffffff)
return (0);
val |= parts[0] << 24;
break;
case 3: /* a.b.c -- 8.8.16 bits */
if ((parts[0] | parts[1]) > 0xff || val > 0xffff)
return (0);
val |= (parts[0] << 24) | (parts[1] << 16);
break;
case 4: /* a.b.c.d -- 8.8.8.8 bits */
if ((parts[0] | parts[1] | parts[2] | val) > 0xff)
return (0);
val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
break;
}
if (dst) {
val = htonl(val);
memcpy(dst, &val, 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.
*/
static int
inet_pton6(const char *src, u_char *dst)
{
static const char xdigits_l[] = "0123456789abcdef",
xdigits_u[] = "0123456789ABCDEF";
u_char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
const char *xdigits, *curtok;
int ch, seen_xdigits;
u_int val;
_DIAGASSERT(src != NULL);
_DIAGASSERT(dst != NULL);
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;
seen_xdigits = 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 |= (int)(pch - xdigits);
if (++seen_xdigits > 4)
return (0);
continue;
}
if (ch == ':') {
curtok = src;
if (!seen_xdigits) {
if (colonp)
return (0);
colonp = tp;
continue;
} else if (*src == '\0')
return (0);
if (tp + NS_INT16SZ > endp)
return (0);
*tp++ = (u_char) (val >> 8) & 0xff;
*tp++ = (u_char) val & 0xff;
seen_xdigits = 0;
val = 0;
continue;
}
if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
inet_pton4(curtok, tp, 1) > 0) {
tp += NS_INADDRSZ;
seen_xdigits = 0;
break; /*%< '\\0' was seen by inet_pton4(). */
}
return (0);
}
if (seen_xdigits) {
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 ptrdiff_t 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, NS_IN6ADDRSZ);
return (1);
}
/*! \file */