f14fb60209
* 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
280 lines
6.4 KiB
C
280 lines
6.4 KiB
C
/*
|
|
* 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 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 <sys/cdefs.h>
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
#ifdef notdef
|
|
static const char rcsid[] = "Id: inet_net_ntop.c,v 1.1.2.1 2002/08/02 02:17:21 marka Exp ";
|
|
#else
|
|
__RCSID("$NetBSD: inet_net_ntop.c,v 1.3 2012/03/20 17:08:13 matt Exp $");
|
|
#endif
|
|
#endif
|
|
|
|
#include "port_before.h"
|
|
|
|
#include "namespace.h"
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "port_after.h"
|
|
|
|
#ifdef __weak_alias
|
|
__weak_alias(inet_net_ntop,_inet_net_ntop)
|
|
#endif
|
|
|
|
#ifdef SPRINTF_CHAR
|
|
# define SPRINTF(x) strlen(sprintf/**/x)
|
|
#else
|
|
# define SPRINTF(x) sprintf x
|
|
#endif
|
|
|
|
static char * inet_net_ntop_ipv4(const u_char *src, int bits,
|
|
char *dst, size_t size);
|
|
static char * inet_net_ntop_ipv6(const u_char *src, int bits,
|
|
char *dst, size_t size);
|
|
|
|
/*
|
|
* char *
|
|
* inet_net_ntop(af, src, bits, dst, size)
|
|
* convert network number from network to presentation format.
|
|
* generates CIDR style result always.
|
|
* return:
|
|
* pointer to dst, or NULL if an error occurred (check errno).
|
|
* author:
|
|
* Paul Vixie (ISC), July 1996
|
|
*/
|
|
char *
|
|
inet_net_ntop(int af, const void *src, int bits, char *dst, size_t size)
|
|
{
|
|
switch (af) {
|
|
case AF_INET:
|
|
return (inet_net_ntop_ipv4(src, bits, dst, size));
|
|
case AF_INET6:
|
|
return (inet_net_ntop_ipv6(src, bits, dst, size));
|
|
default:
|
|
errno = EAFNOSUPPORT;
|
|
return (NULL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* static char *
|
|
* inet_net_ntop_ipv4(src, bits, dst, size)
|
|
* convert IPv4 network number from network to presentation format.
|
|
* generates CIDR style result always.
|
|
* return:
|
|
* pointer to dst, or NULL if an error occurred (check errno).
|
|
* note:
|
|
* network byte order assumed. this means 192.5.5.240/28 has
|
|
* 0b11110000 in its fourth octet.
|
|
* author:
|
|
* Paul Vixie (ISC), July 1996
|
|
*/
|
|
static char *
|
|
inet_net_ntop_ipv4(const u_char *src, int bits, char *dst, size_t size)
|
|
{
|
|
char *odst = dst;
|
|
char *t;
|
|
u_int m;
|
|
int b;
|
|
|
|
if (bits < 0 || bits > 32) {
|
|
errno = EINVAL;
|
|
return (NULL);
|
|
}
|
|
|
|
if (bits == 0) {
|
|
if (size < sizeof "0")
|
|
goto emsgsize;
|
|
*dst++ = '0';
|
|
size--;
|
|
*dst = '\0';
|
|
}
|
|
|
|
/* Format whole octets. */
|
|
for (b = bits / 8; b > 0; b--) {
|
|
if (size <= sizeof "255.")
|
|
goto emsgsize;
|
|
t = dst;
|
|
dst += SPRINTF((dst, "%u", *src++));
|
|
if (b > 1) {
|
|
*dst++ = '.';
|
|
*dst = '\0';
|
|
}
|
|
size -= (size_t)(dst - t);
|
|
}
|
|
|
|
/* Format partial octet. */
|
|
b = bits % 8;
|
|
if (b > 0) {
|
|
if (size <= sizeof ".255")
|
|
goto emsgsize;
|
|
t = dst;
|
|
if (dst != odst)
|
|
*dst++ = '.';
|
|
m = ((1 << b) - 1) << (8 - b);
|
|
dst += SPRINTF((dst, "%u", *src & m));
|
|
size -= (size_t)(dst - t);
|
|
}
|
|
|
|
/* Format CIDR /width. */
|
|
if (size <= sizeof "/32")
|
|
goto emsgsize;
|
|
dst += SPRINTF((dst, "/%u", bits));
|
|
return (odst);
|
|
|
|
emsgsize:
|
|
errno = EMSGSIZE;
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* static char *
|
|
* inet_net_ntop_ipv6(src, bits, fakebits, dst, size)
|
|
* convert IPv6 network number from network to presentation format.
|
|
* generates CIDR style result always. Picks the shortest representation
|
|
* unless the IP is really IPv4.
|
|
* always prints specified number of bits (bits).
|
|
* return:
|
|
* pointer to dst, or NULL if an error occurred (check errno).
|
|
* note:
|
|
* network byte order assumed. this means 192.5.5.240/28 has
|
|
* 0x11110000 in its fourth octet.
|
|
* author:
|
|
* Vadim Kogan (UCB), June 2001
|
|
* Original version (IPv4) by Paul Vixie (ISC), July 1996
|
|
*/
|
|
|
|
static char *
|
|
inet_net_ntop_ipv6(const u_char *src, int bits, char *dst, size_t size)
|
|
{
|
|
u_int m;
|
|
int b;
|
|
size_t p;
|
|
size_t zero_s, zero_l, tmp_zero_s, tmp_zero_l;
|
|
size_t i;
|
|
int is_ipv4 = 0;
|
|
unsigned char inbuf[16];
|
|
char outbuf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
|
|
char *cp;
|
|
size_t words;
|
|
u_char *s;
|
|
|
|
if (bits < 0 || bits > 128) {
|
|
errno = EINVAL;
|
|
return (NULL);
|
|
}
|
|
|
|
cp = outbuf;
|
|
|
|
if (bits == 0) {
|
|
*cp++ = ':';
|
|
*cp++ = ':';
|
|
*cp = '\0';
|
|
} else {
|
|
/* Copy src to private buffer. Zero host part. */
|
|
p = (bits + 7) / 8;
|
|
memcpy(inbuf, src, p);
|
|
memset(inbuf + p, 0, 16 - p);
|
|
b = bits % 8;
|
|
if (b != 0) {
|
|
m = ~0 << (8 - b);
|
|
inbuf[p-1] &= m;
|
|
}
|
|
|
|
s = inbuf;
|
|
|
|
/* how many words need to be displayed in output */
|
|
words = (bits + 15) / 16;
|
|
if (words == 1)
|
|
words = 2;
|
|
|
|
/* Find the longest substring of zero's */
|
|
zero_s = zero_l = tmp_zero_s = tmp_zero_l = 0;
|
|
for (i = 0; i < (words * 2); i += 2) {
|
|
if ((s[i] | s[i+1]) == 0) {
|
|
if (tmp_zero_l == 0)
|
|
tmp_zero_s = i / 2;
|
|
tmp_zero_l++;
|
|
} else {
|
|
if (tmp_zero_l && zero_l < tmp_zero_l) {
|
|
zero_s = tmp_zero_s;
|
|
zero_l = tmp_zero_l;
|
|
tmp_zero_l = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (tmp_zero_l && zero_l < tmp_zero_l) {
|
|
zero_s = tmp_zero_s;
|
|
zero_l = tmp_zero_l;
|
|
}
|
|
|
|
if (zero_l != words && zero_s == 0 && ((zero_l == 6) ||
|
|
((zero_l == 5 && s[10] == 0xff && s[11] == 0xff) ||
|
|
((zero_l == 7 && s[14] != 0 && s[15] != 1)))))
|
|
is_ipv4 = 1;
|
|
|
|
/* Format whole words. */
|
|
for (p = 0; p < words; p++) {
|
|
if (zero_l != 0 && p >= zero_s && p < zero_s + zero_l) {
|
|
/* Time to skip some zeros */
|
|
if (p == zero_s)
|
|
*cp++ = ':';
|
|
if (p == words - 1)
|
|
*cp++ = ':';
|
|
s++;
|
|
s++;
|
|
continue;
|
|
}
|
|
|
|
if (is_ipv4 && p > 5 ) {
|
|
*cp++ = (p == 6) ? ':' : '.';
|
|
cp += SPRINTF((cp, "%u", *s++));
|
|
/* we can potentially drop the last octet */
|
|
if (p != 7 || bits > 120) {
|
|
*cp++ = '.';
|
|
cp += SPRINTF((cp, "%u", *s++));
|
|
}
|
|
} else {
|
|
if (cp != outbuf)
|
|
*cp++ = ':';
|
|
cp += SPRINTF((cp, "%x", *s * 256 + s[1]));
|
|
s += 2;
|
|
}
|
|
}
|
|
}
|
|
/* Format CIDR /width. */
|
|
(void)SPRINTF((cp, "/%u", bits));
|
|
if (strlen(outbuf) + 1 > size)
|
|
goto emsgsize;
|
|
strcpy(dst, outbuf);
|
|
|
|
return (dst);
|
|
|
|
emsgsize:
|
|
errno = EMSGSIZE;
|
|
return (NULL);
|
|
}
|