/*
- * 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.
+ *
+ * $PostgreSQL: pgsql/src/backend/utils/adt/inet_net_ntop.c,v 1.24 2006/07/14 16:59:19 tgl Exp $
*/
#if defined(LIBC_SCCS) && !defined(lint)
-static const char rcsid[] = "$Id: inet_net_ntop.c,v 1.5 1999/05/25 05:29:38 momjian Exp $";
-
+static const char rcsid[] = "Id: inet_net_ntop.c,v 1.1.2.2 2004/03/09 09:17:27 marka Exp $";
#endif
+#include "postgres.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 "utils/builtins.h"
+#include "utils/inet.h"
+
-#include <postgres.h>
-#include <utils/builtins.h>
+#define NS_IN6ADDRSZ 16
+#define NS_INT16SZ 2
#ifdef SPRINTF_CHAR
#define SPRINTF(x) strlen(sprintf/**/x)
#endif
static char *inet_net_ntop_ipv4(const u_char *src, int bits,
- char *dst, size_t size);
+ char *dst, size_t size);
static char *inet_cidr_ntop_ipv4(const u_char *src, int bits,
- char *dst, size_t size);
+ char *dst, size_t size);
+static char *inet_net_ntop_ipv6(const u_char *src, int bits,
+ char *dst, size_t size);
+static char *inet_cidr_ntop_ipv6(const u_char *src, int bits,
+ char *dst, size_t size);
/*
* char *
{
switch (af)
{
- case AF_INET:
+ case PGSQL_AF_INET:
return (inet_cidr_ntop_ipv4(src, bits, dst, size));
+ case PGSQL_AF_INET6:
+ return (inet_cidr_ntop_ipv6(src, bits, dst, size));
default:
errno = EAFNOSUPPORT;
return (NULL);
* 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++));
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_cidr_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_cidr_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. */
+ (void) SPRINTF((cp, "/%u", bits));
+ if (strlen(outbuf) + 1 > size)
+ goto emsgsize;
+ strcpy(dst, outbuf);
+
+ return (dst);
+
+emsgsize:
+ errno = EMSGSIZE;
+ return (NULL);
+}
+
/*
* char *
{
switch (af)
{
- case AF_INET:
+ case PGSQL_AF_INET:
return (inet_net_ntop_ipv4(src, bits, dst, size));
+ case PGSQL_AF_INET6:
+ return (inet_net_ntop_ipv6(src, bits, dst, size));
default:
errno = EAFNOSUPPORT;
return (NULL);
static char *
inet_net_ntop_ipv4(const u_char *src, int bits, char *dst, size_t size)
{
- char *odst = dst;
- char *t;
- size_t len = 4;
- int b, tb;
+ char *odst = dst;
+ char *t;
+ int len = 4;
+ int b;
if (bits < 0 || bits > 32)
{
errno = EINVAL;
return (NULL);
}
- if (bits == 0)
+
+ /* Always format all four octets, regardless of mask length. */
+ for (b = len; b > 0; b--)
{
- if (size < sizeof "0")
+ if (size <= sizeof ".255")
goto emsgsize;
- *dst++ = '0';
- size--;
- *dst = '\0';
+ t = dst;
+ if (dst != odst)
+ *dst++ = '.';
+ dst += SPRINTF((dst, "%u", *src++));
+ size -= (size_t) (dst - t);
}
- /* Format whole octets plus nonzero trailing octets. */
- tb = (bits == 32) ? 31 : bits;
- for (b = 0; bits != 0 && (b <= (tb / 8) || (b < len && *src != 0)); b++)
+ /* don't print masklen if 32 bits */
+ if (bits != 32)
{
- if (size < sizeof "255.")
+ if (size <= sizeof "/32")
goto emsgsize;
+ dst += SPRINTF((dst, "/%u", bits));
+ }
+
+ return (odst);
+
+emsgsize:
+ errno = EMSGSIZE;
+ return (NULL);
+}
+
+static int
+decoct(const u_char *src, int bytes, char *dst, size_t size)
+{
+ char *odst = dst;
+ char *t;
+ int b;
+
+ for (b = 1; b <= bytes; b++)
+ {
+ if (size <= sizeof "255.")
+ return (0);
t = dst;
dst += SPRINTF((dst, "%u", *src++));
- if (b + 1 <= (tb / 8) || (b + 1 < len && *src != 0))
+ if (b != bytes)
{
*dst++ = '.';
*dst = '\0';
}
- size -= (size_t)(dst - t);
+ size -= (size_t) (dst - t);
}
+ return (dst - odst);
+}
- /* don't print masklen if 32 bits */
- if (bits == 32)
- return odst;
+static char *
+inet_net_ntop_ipv6(const u_char *src, int bits, char *dst, size_t size)
+{
+ /*
+ * Note that int32_t and int16_t need only be "at least" large enough to
+ * contain a value of the specified size. On some systems, like Crays,
+ * there is no such thing as an integer variable with 16 bits. Keep this
+ * in mind if you think this function should have been coded to use
+ * pointer overlays. All the world's not a VAX.
+ */
+ char tmp[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255/128"];
+ char *tp;
+ struct
+ {
+ int base,
+ len;
+ } best, cur;
+ u_int words[NS_IN6ADDRSZ / NS_INT16SZ];
+ int i;
- /* Format CIDR /width. */
- if (size < sizeof "/32")
- goto emsgsize;
- dst += SPRINTF((dst, "/%u", bits));
+ if ((bits < -1) || (bits > 128))
+ {
+ errno = EINVAL;
+ return (NULL);
+ }
- return (odst);
+ /*
+ * Preprocess: Copy the input (bytewise) array into a wordwise array. Find
+ * the longest run of 0x00's in src[] for :: shorthanding.
+ */
+ memset(words, '\0', sizeof words);
+ for (i = 0; i < NS_IN6ADDRSZ; i++)
+ words[i / 2] |= (src[i] << ((1 - (i % 2)) << 3));
+ best.base = -1;
+ cur.base = -1;
+ best.len = 0;
+ cur.len = 0;
+ for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++)
+ {
+ if (words[i] == 0)
+ {
+ if (cur.base == -1)
+ cur.base = i, cur.len = 1;
+ else
+ cur.len++;
+ }
+ else
+ {
+ if (cur.base != -1)
+ {
+ if (best.base == -1 || cur.len > best.len)
+ best = cur;
+ cur.base = -1;
+ }
+ }
+ }
+ if (cur.base != -1)
+ {
+ if (best.base == -1 || cur.len > best.len)
+ best = cur;
+ }
+ if (best.base != -1 && best.len < 2)
+ best.base = -1;
- emsgsize:
- errno = EMSGSIZE;
- return (NULL);
+ /*
+ * Format the result.
+ */
+ tp = tmp;
+ for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++)
+ {
+ /* Are we inside the best run of 0x00's? */
+ if (best.base != -1 && i >= best.base &&
+ i < (best.base + best.len))
+ {
+ if (i == best.base)
+ *tp++ = ':';
+ continue;
+ }
+ /* Are we following an initial run of 0x00s or any real hex? */
+ if (i != 0)
+ *tp++ = ':';
+ /* Is this address an encapsulated IPv4? */
+ if (i == 6 && best.base == 0 && (best.len == 6 ||
+ (best.len == 7 && words[7] != 0x0001) ||
+ (best.len == 5 && words[5] == 0xffff)))
+ {
+ int n;
+
+ n = decoct(src + 12, 4, tp, sizeof tmp - (tp - tmp));
+ if (n == 0)
+ {
+ errno = EMSGSIZE;
+ return (NULL);
+ }
+ tp += strlen(tp);
+ break;
+ }
+ tp += SPRINTF((tp, "%x", words[i]));
+ }
+
+ /* Was it a trailing run of 0x00's? */
+ if (best.base != -1 && (best.base + best.len) ==
+ (NS_IN6ADDRSZ / NS_INT16SZ))
+ *tp++ = ':';
+ *tp = '\0';
+
+ if (bits != -1 && bits != 128)
+ tp += SPRINTF((tp, "/%u", bits));
+
+ /*
+ * Check for overflow, copy, and we're done.
+ */
+ if ((size_t) (tp - tmp) > size)
+ {
+ errno = EMSGSIZE;
+ return (NULL);
+ }
+ strcpy(dst, tmp);
+ return (dst);
}
projects / postgresql / blobdiff