/*
- * Copyright (c) 1996 by Internet Software Consortium.
+ * 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 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.
+ * 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
-static const char orig_rcsid[] = "From Id: inet_net_ntop.c,v 8.2 1996/08/08 06:54:44 vixie Exp";
+static const char rcsid[] = "$Id: inet_net_ntop.c,v 1.3.18.2 2006/06/20 02:51:32 marka Exp $";
#endif
#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/net/inet_net_ntop.c,v 1.7 2002/03/22 21:52:29 obrien Exp $");
+__FBSDID("$FreeBSD: src/lib/libc/inet/inet_net_ntop.c,v 1.4 2007/06/03 17:20:26 ume Exp $");
+
+#include "port_before.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include <stdlib.h>
+#include "port_after.h"
+
#ifdef SPRINTF_CHAR
# define SPRINTF(x) strlen(sprintf/**/x)
#else
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.
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.
* 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.
+ * 0b11110000 in its fourth octet.
* author:
* Paul Vixie (ISC), July 1996
*/
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.")
+ if (size <= sizeof "255.")
goto emsgsize;
t = dst;
dst += SPRINTF((dst, "%u", *src++));
/* Format partial octet. */
b = bits % 8;
if (b > 0) {
- if (size < sizeof ".255")
+ if (size <= sizeof ".255")
goto emsgsize;
t = dst;
if (dst != odst)
}
/* Format CIDR /width. */
- if (size < sizeof "/32")
+ if (size <= sizeof "/32")
goto emsgsize;
dst += SPRINTF((dst, "/%u", bits));
return (odst);
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
+ * 0b11110000 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;
+ int p;
+ int zero_s, zero_l, tmp_zero_s, tmp_zero_l;
+ int 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;
+ int 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. */
+ sprintf(cp, "/%u", bits);
+ if (strlen(outbuf) + 1 > size)
+ goto emsgsize;
+ strcpy(dst, outbuf);
+
+ return (dst);
+
+emsgsize:
+ errno = EMSGSIZE;
+ return (NULL);
+}
+
/*
* Weak aliases for applications that use certain private entry points,
* and fail to include <arpa/inet.h>.
*/
#undef inet_net_ntop
__weak_reference(__inet_net_ntop, inet_net_ntop);
+
+/*! \file */
projects / apple / libc.git / blobdiff