Add ipv6 address parsing support to 'inet' and 'cidr' data types.

Regression tests for IPv6 operations added.

        Documentation updated to document IPv6 bits.

        Stop treating IPv4 as an "unsigned int" and IPv6 as an array of
        characters.  Instead, always use the array of characters so we
        can have one function fits all.  This makes bitncmp(), addressOK(),
        and several other functions "just work" on both address families.

        add family() function which returns integer 4 or 6 for IPv4 or
        IPv6.  (See examples below)  Note that to add this new function
        you will need to dump/initdb/reload or find the correct magic
        to add the function to the postgresql function catalogs.

        IPv4 addresses always sort before IPv6.

        On disk we use AF_INET for IPv4, and AF_INET+1 for IPv6 addresses.
        This prevents the need for a dump and reload, but lets IPv6 parsing
        work on machines without AF_INET6.

        To select all IPv4 addresses from a table:

                select * from foo where family(addr) = 4 ...

        Order by and other bits should all work.

Michael Graff

doc/src/sgml/datatype.sgml

@@ -1,5 +1,5 @@
 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/datatype.sgml,v 1.117 2003/06/17 23:12:36 tgl Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/datatype.sgml,v 1.118 2003/06/24 22:21:21 momjian Exp $
 -->
 
  <chapter id="datatype">
@@ -100,7 +100,7 @@ $Header: /cvsroot/pgsql/doc/src/sgml/datatype.sgml,v 1.117 2003/06/17 23:12:36 t
       <row>
        <entry><type>cidr</type></entry>
        <entry></entry>
-       <entry>IP network address</entry>
+       <entry>IPv4 or IPv6 network address</entry>
       </row>
 
       <row>
@@ -124,7 +124,7 @@ $Header: /cvsroot/pgsql/doc/src/sgml/datatype.sgml,v 1.117 2003/06/17 23:12:36 t
       <row>
        <entry><type>inet</type></entry>
        <entry></entry>
-       <entry>IP host address</entry>
+       <entry>IPv4 or IPv6 host address</entry>
       </row>
 
       <row>
@@ -2425,7 +2425,7 @@ SELECT * FROM test1 WHERE a;
    </indexterm>
 
    <para>
-    <productname>PostgreSQL</> offers data types to store IP and MAC
+    <productname>PostgreSQL</> offers data types to store IPv4, IPv6, and MAC
     addresses, shown in <xref linkend="datatype-net-types-table">.  It
     is preferable to use these types over plain text types, because
     these types offer input error checking and several specialized
@@ -2446,14 +2446,14 @@ SELECT * FROM test1 WHERE a;
 
        <row>
 	<entry><type>cidr</type></entry>
-	<entry>12 bytes</entry>
-	<entry>IPv4 networks</entry>
+	<entry>12 or 24 bytes</entry>
+	<entry>IPv4 or IPv6 networks</entry>
        </row>
 
        <row>
 	<entry><type>inet</type></entry>
-	<entry>12 bytes</entry>
-	<entry>IPv4 hosts and networks</entry>
+	<entry>12 or 24 bytes</entry>
+	<entry>IPv4 and IPv6 hosts and networks</entry>
        </row>
 
        <row>
@@ -2467,7 +2467,10 @@ SELECT * FROM test1 WHERE a;
     </table>
 
    <para>
-    IPv6 is not yet supported.
+    When sorting <type>inet</type> or <type>cidr</type> data types,
+    IPv4 addresses will always sort before IPv6 addresses, including
+    IPv4 addresses encapsulated or mapped into IPv6 addresses, such as
+    ::10.2.3.4 or ::ffff::10.4.3.2.
    </para>
 
 
@@ -2479,26 +2482,32 @@ SELECT * FROM test1 WHERE a;
     </indexterm>
 
     <para>
-     The <type>inet</type> type holds an IP host address, and
+     The <type>inet</type> type holds an IPv4 or IPv6 host address, and
      optionally the identity of the subnet it is in, all in one field.
      The subnet identity is represented by stating how many bits of
      the host address represent the network address (the
-     <quote>netmask</quote>).  If the netmask is 32, then the value
-     does not indicate a subnet, only a single host.  Note that if you
+     <quote>netmask</quote>).  If the netmask is 32 and the address is IPv4,
+     then the value does not indicate a subnet, only a single host.
+     In IPv6, the address length is 128 bits, so 128 bits will specify a
+     unique host address.  Note that if you
      want to accept networks only, you should use the
      <type>cidr</type> type rather than <type>inet</type>.
     </para>
 
     <para>
-     The input format for this type is <replaceable
-     class="parameter">x.x.x.x/y</replaceable> where <replaceable
-     class="parameter">x.x.x.x</replaceable> is an IP address and
-     <replaceable class="parameter">y</replaceable> is the number of
-     bits in the netmask.  If the <replaceable
-     class="parameter">/y</replaceable> part is left off, then the
-     netmask is 32, and the value represents just a single host.
-     On display, the <replaceable class="parameter">/y</replaceable>
-     portion is suppressed if the netmask is 32.
+      The input format for this type is
+      <replaceable class="parameter">address/y</replaceable>
+      where
+      <replaceable class="parameter">address</replaceable>
+      is an IPv4 or IPv6 address and
+      <replaceable class="parameter">y</replaceable>
+      is the number of bits in the netmask.  If the
+      <replaceable class="parameter">/y</replaceable>
+      part is left off, then the
+      netmask is 32 for IPv4 and 128 for IPv6, and the value represents
+      just a single host.  On display, the
+      <replaceable class="parameter">/y</replaceable>
+      portion is suppressed if the netmask specifies a single host.
     </para>
    </sect2>
 
@@ -2510,12 +2519,13 @@ SELECT * FROM test1 WHERE a;
     </indexterm>
 
     <para>
-     The <type>cidr</type> type holds an IP network specification.
+     The <type>cidr</type> type holds an IPv4 or IPv6 network specification.
      Input and output formats follow Classless Internet Domain Routing
      conventions.
      The format for specifying networks is <replaceable
-     class="parameter">x.x.x.x/y</> where <replaceable
-     class="parameter">x.x.x.x</> is the network and <replaceable
+     class="parameter">address/y</> where <replaceable
+     class="parameter">address</> is the network represented as an
+     IPv4 or IPv6 address, and <replaceable
      class="parameter">y</> is the number of bits in the netmask.  If
      <replaceable class="parameter">y</> is omitted, it is calculated
      using assumptions from the older classful network numbering system, except
@@ -2594,6 +2604,28 @@ SELECT * FROM test1 WHERE a;
 	 <entry>10.0.0.0/8</entry>
 	 <entry>10/8</entry>
 	</row>
+	<row>
+	 <entry>10.1.2.3/32</entry>
+	 <entry>10.1.2.3/32</entry>
+         <entry>10.1.2.3/32</entry>
+        <row>
+	 <entry>2001:4f8:3:ba::/64</entry>
+	 <entry>2001:4f8:3:ba::/64</entry>
+	 <entry>2001:4f8:3:ba::/64</entry>
+	</row>
+        <row>
+	 <entry>2001:4f8:3:ba:2e0:81ff:fe22:d1f1/128</entry>
+	 <entry>2001:4f8:3:ba:2e0:81ff:fe22:d1f1/128</entry>
+	 <entry>2001:4f8:3:ba:2e0:81ff:fe22:d1f1</entry>
+	</row>
+	<row>
+	 <entry>::ffff:1.2.3.0/120</entry>
+	 <entry>::ffff:1.2.3.0/120</entry>
+         <entry>::ffff:1.2.3/120</entry>
+	<row>
+	 <entry>::ffff:1.2.3.0/128</entry>
+	 <entry>::ffff:1.2.3.0/128</entry>
+         <entry>::ffff:1.2.3.0/128</entry>
        </tbody>
       </tgroup>
      </table>

src/backend/utils/adt/inet_net_ntop.c

@@ -16,7 +16,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static const char rcsid[] = "$Id: inet_net_ntop.c,v 1.12 2002/09/02 02:47:04 momjian Exp $";
+static const char rcsid[] = "$Id: inet_net_ntop.c,v 1.13 2003/06/24 22:21:22 momjian Exp $";
 #endif
 
 #include "postgres.h"
@@ -27,8 +27,12 @@ static const char rcsid[] = "$Id: inet_net_ntop.c,v 1.12 2002/09/02 02:47:04 mom
 
 #include <errno.h>
 
+#include "utils/inet.h"
 #include "utils/builtins.h"
 
+#define NS_IN6ADDRSZ 16
+#define NS_INT16SZ 2
+
 #ifdef SPRINTF_CHAR
 #define SPRINTF(x) strlen(sprintf/**/x)
 #else
@@ -39,6 +43,10 @@ static char *inet_net_ntop_ipv4(const u_char *src, int bits,
 				char *dst, size_t size);
 static char *inet_cidr_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);
+static char *inet_cidr_ntop_ipv6(const u_char *src, int bits,
+				 char *dst, size_t size);
 
 /*
  * char *
@@ -55,8 +63,10 @@ inet_cidr_ntop(int af, const void *src, int bits, char *dst, size_t size)
 {
 	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);
@@ -136,6 +146,148 @@ 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_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;
+	int     double_colon = 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;
+	double_colon = 0;
+
+	if (bits == 0) {
+		*cp++ = ':';
+		*cp++ = ':';
+		*cp = '\0';
+		double_colon = 1;
+	} 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++ = ':';
+					double_colon = 1;
+				}
+				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;
+			}
+		}
+	}
+
+	if (!double_colon) {
+		if (bits < 128 - 32)
+			cp += SPRINTF((cp, "::", bits));
+		else if (bits < 128 - 16)
+			cp += SPRINTF((cp, ":0", bits));
+	}
+
+	/* Format CIDR /width. */
+	SPRINTF((cp, "/%u", bits));
+
+	if (strlen(outbuf) + 1 > size)
+		goto emsgsize;
+	strcpy(dst, outbuf);
+	
+	return (dst);
+
+emsgsize:
+	errno = EMSGSIZE;
+	return (NULL);
+}
 
 /*
  * char *
@@ -156,8 +308,10 @@ inet_net_ntop(int af, const void *src, int bits, char *dst, size_t size)
 {
 	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);
@@ -217,3 +371,127 @@ 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 != bytes) {
+			*dst++ = '.';
+			*dst = '\0';
+		}
+		size -= (size_t)(dst - t);
+	}
+	return (dst - 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;
+
+	if ((bits < -1) || (bits > 128)) {
+		errno = EINVAL;
+		return (NULL);
+	}
+
+	/*
+	 * 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;
+	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;
+
+	/*
+	 * 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);
+}

src/backend/utils/adt/inet_net_pton.c

@@ -16,7 +16,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static const char rcsid[] = "$Id: inet_net_pton.c,v 1.14 2002/09/02 02:47:04 momjian Exp $";
+static const char rcsid[] = "$Id: inet_net_pton.c,v 1.15 2003/06/24 22:21:22 momjian Exp $";
 #endif
 
 #include "postgres.h"
@@ -29,16 +29,14 @@ static const char rcsid[] = "$Id: inet_net_pton.c,v 1.14 2002/09/02 02:47:04 mom
 #include <ctype.h>
 #include <errno.h>
 
-#include "utils/builtins.h"
+#include "utils/inet.h"
 
-#ifdef SPRINTF_CHAR
-#define SPRINTF(x) strlen(sprintf/**/x)
-#else
-#define SPRINTF(x) ((size_t)sprintf x)
-#endif
+#include "utils/builtins.h"
 
 static int	inet_net_pton_ipv4(const char *src, u_char *dst);
 static int	inet_cidr_pton_ipv4(const char *src, u_char *dst, size_t size);
+static int      inet_net_pton_ipv6(const char *src, u_char *dst);
+static int      inet_cidr_pton_ipv6(const char *src, u_char *dst, size_t size);
 
 /*
  * static int
@@ -63,10 +61,14 @@ inet_net_pton(int af, const char *src, void *dst, size_t size)
 {
 	switch (af)
 	{
-		case AF_INET:
+		case PGSQL_AF_INET:
 			return size == -1 ?
 				inet_net_pton_ipv4(src, dst) :
 				inet_cidr_pton_ipv4(src, dst, size);
+		case PGSQL_AF_INET6:
+			return size == -1 ?
+				inet_net_pton_ipv6(src, dst) :
+				inet_cidr_pton_ipv6(src, dst, size);
 		default:
 			errno = EAFNOSUPPORT;
 			return (-1);
@@ -335,3 +337,199 @@ emsgsize:
 	errno = EMSGSIZE;
 	return (-1);
 }
+
+static int
+getbits(const char *src, int *bitsp) {
+	static const char digits[] = "0123456789";
+	int n;
+	int val;
+	char ch;
+
+	val = 0;
+	n = 0;
+	while ((ch = *src++) != '\0') {
+		const char *pch;
+
+		pch = strchr(digits, ch);
+		if (pch != NULL) {
+			if (n++ != 0 && val == 0)	/* no leading zeros */
+				return (0);
+			val *= 10;
+			val += (pch - digits);
+			if (val > 128)			/* range */
+				return (0);
+			continue;
+		}
+		return (0);
+	}
+	if (n == 0)
+		return (0);
+	*bitsp = val;
+	return (1);
+}
+
+static int
+getv4(const char *src, u_char *dst, int *bitsp) {
+	static const char digits[] = "0123456789";
+	u_char *odst = dst;
+	int n;
+	u_int val;
+	char ch;
+
+	val = 0;
+	n = 0;
+	while ((ch = *src++) != '\0') {
+		const char *pch;
+
+		pch = strchr(digits, ch);
+		if (pch != NULL) {
+			if (n++ != 0 && val == 0)	/* no leading zeros */
+				return (0);
+			val *= 10;
+			val += (pch - digits);
+			if (val > 255)			/* range */
+				return (0);
+			continue;
+		}
+		if (ch == '.' || ch == '/') {
+			if (dst - odst > 3)		/* too many octets? */
+				return (0);
+			*dst++ = val;
+			if (ch == '/')
+				return (getbits(src, bitsp));
+			val = 0;
+			n = 0;
+			continue;
+		}
+		return (0);
+	}
+	if (n == 0)
+		return (0);
+	if (dst - odst > 3)		/* too many octets? */
+		return (0);
+	*dst++ = val;
+	return (1);
+}
+
+static int
+inet_net_pton_ipv6(const char *src, u_char *dst)
+{
+	return inet_cidr_pton_ipv6(src, dst, 16);
+}
+
+#define NS_IN6ADDRSZ 16
+#define NS_INT16SZ 2
+#define NS_INADDRSZ 4
+
+static int
+inet_cidr_pton_ipv6(const char *src, u_char *dst, size_t size) {
+	static const char xdigits_l[] = "0123456789abcdef",
+			  xdigits_u[] = "0123456789ABCDEF";
+	u_char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
+	const char *xdigits, *curtok;
+	int ch, saw_xdigit;
+	u_int val;
+	int digits;
+	int bits;
+
+	if (size < NS_IN6ADDRSZ)
+		goto emsgsize;
+
+	memset((tp = tmp), '\0', NS_IN6ADDRSZ);
+	endp = tp + NS_IN6ADDRSZ;
+	colonp = NULL;
+	/* Leading :: requires some special handling. */
+	if (*src == ':')
+		if (*++src != ':')
+			goto enoent;
+	curtok = src;
+	saw_xdigit = 0;
+	val = 0;
+	digits = 0;
+	bits = -1;
+	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 (++digits > 4)
+				goto enoent;
+			saw_xdigit = 1;
+			continue;
+		}
+		if (ch == ':') {
+			curtok = src;
+			if (!saw_xdigit) {
+				if (colonp)
+					goto enoent;
+				colonp = tp;
+				continue;
+			} else if (*src == '\0')
+				goto enoent;
+			if (tp + NS_INT16SZ > endp)
+				return (0);
+			*tp++ = (u_char) (val >> 8) & 0xff;
+			*tp++ = (u_char) val & 0xff;
+			saw_xdigit = 0;
+			digits = 0;
+			val = 0;
+			continue;
+		}
+		if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
+		     getv4(curtok, tp, &bits) > 0) {
+			tp += NS_INADDRSZ;
+			saw_xdigit = 0;
+			break;	/* '\0' was seen by inet_pton4(). */
+		}
+		if (ch == '/' && getbits(src, &bits) > 0)
+			break;
+		goto enoent;
+	}
+	if (saw_xdigit) {
+		if (tp + NS_INT16SZ > endp)
+			goto enoent;
+		*tp++ = (u_char) (val >> 8) & 0xff;
+		*tp++ = (u_char) val & 0xff;
+	}
+	if (bits == -1)
+		bits = 128;
+
+	endp =  tmp + 16;
+
+	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;
+
+		if (tp == endp)
+			goto enoent;
+		for (i = 1; i <= n; i++) {
+			endp[- i] = colonp[n - i];
+			colonp[n - i] = 0;
+		}
+		tp = endp;
+	}
+	if (tp != endp)
+		goto enoent;
+
+	/*
+	 * Copy out the result.
+	 */
+	memcpy(dst, tmp, NS_IN6ADDRSZ);
+
+	return (bits);
+
+ enoent:
+	errno = ENOENT;
+	return (-1);
+
+ emsgsize:
+	errno = EMSGSIZE;
+	return (-1);
+}

src/backend/utils/adt/network.c

@@ -1,9 +1,7 @@
 /*
- *	PostgreSQL type definitions for the INET type.	This
- *	is for IP V4 CIDR notation, but prepared for V6: just
- *	add the necessary bits where the comments indicate.
+ *	PostgreSQL type definitions for the INET and CIDR types.
  *
- *	$Header: /cvsroot/pgsql/src/backend/utils/adt/network.c,v 1.41 2003/05/13 18:03:07 tgl Exp $
+ *	$Header: /cvsroot/pgsql/src/backend/utils/adt/network.c,v 1.42 2003/06/24 22:21:22 momjian Exp $
  *
  *	Jon Postel RIP 16 Oct 1998
  */
@@ -23,16 +21,14 @@
 
 static Datum text_network(text *src, int type);
 static int32 network_cmp_internal(inet *a1, inet *a2);
-static int	v4bitncmp(unsigned long a1, unsigned long a2, int bits);
-static bool v4addressOK(unsigned long a1, int bits);
+static int bitncmp(void *l, void *r, int n);
+static bool addressOK(unsigned char *a, int bits, int family);
+static int ip_addrsize(inet *inetptr);
 
 /*
- *	Access macros.	Add IPV6 support.
+ *	Access macros.
  */
 
-#define ip_addrsize(inetptr) \
-	(((inet_struct *)VARDATA(inetptr))->family == AF_INET ? 4 : -1)
-
 #define ip_family(inetptr) \
 	(((inet_struct *)VARDATA(inetptr))->family)
 
@@ -42,8 +38,28 @@ static bool v4addressOK(unsigned long a1, int bits);
 #define ip_type(inetptr) \
 	(((inet_struct *)VARDATA(inetptr))->type)
 
-#define ip_v4addr(inetptr) \
-	(((inet_struct *)VARDATA(inetptr))->addr.ipv4_addr)
+#define ip_addr(inetptr) \
+	(((inet_struct *)VARDATA(inetptr))->ip_addr)
+
+#define ip_maxbits(inetptr) \
+	(ip_family(inetptr) == PGSQL_AF_INET ? 32 : 128)
+
+/*
+ * Now, as a function!
+ * Return the number of bytes of storage needed for this data type.
+ */
+static int
+ip_addrsize(inet *inetptr)
+{
+	switch (ip_family(inetptr)) {
+	case PGSQL_AF_INET:
+		return 4;
+	case PGSQL_AF_INET6:
+		return 16;
+	default:
+		return -1;
+	}
+}
 
 /* Common input routine */
 static inet *
@@ -52,32 +68,38 @@ network_in(char *src, int type)
 	int	    bits;
 	inet	   *dst;
 
-	/* make sure any unused bits in a CIDR value are zeroed */
 	dst = (inet *) palloc0(VARHDRSZ + sizeof(inet_struct));
 
-	/* First, try for an IP V4 address: */
-	ip_family(dst) = AF_INET;
-	bits = inet_net_pton(ip_family(dst), src, &ip_v4addr(dst),
+	/*
+	 * First, check to see if this is an IPv6 or IPv4 address.  IPv6
+	 * addresses will have a : somewhere in them (several, in fact) so
+	 * if there is one present, assume it's V6, otherwise assume it's V4.
+	 */
+
+	if (strchr(src, ':') != NULL) {
+		ip_family(dst) = PGSQL_AF_INET6;
+	} else {
+		ip_family(dst) = PGSQL_AF_INET;
+        }
+  
+	bits = inet_net_pton(ip_family(dst), src, ip_addr(dst),
 			     type ? ip_addrsize(dst) : -1);
-	if ((bits < 0) || (bits > 32))
-	{
-		/* Go for an IPV6 address here, before faulting out: */
+	if ((bits < 0) || (bits > ip_maxbits(dst)))
 		elog(ERROR, "invalid %s value '%s'",
 		     type ? "CIDR" : "INET", src);
-	}
 
         /*
-	 * Error check: CIDR values must not have any bits set beyond the
-	 * masklen. XXX this code is not IPV6 ready.
+	 * Error check: CIDR values must not have any bits set beyond
+	 * the masklen.
          */
         if (type)
 	{
-		if (!v4addressOK(ip_v4addr(dst), bits))
+		if (!addressOK(ip_addr(dst), bits, ip_family(dst)))
 			elog(ERROR, "invalid CIDR value '%s': has bits set to right of mask", src);
 	}
 
 	VARATT_SIZEP(dst) = VARHDRSZ
-		+ ((char *) &ip_v4addr(dst) - (char *) VARDATA(dst))
+		+ ((char *) ip_addr(dst) - (char *) VARDATA(dst))
 		+ ip_addrsize(dst);
 	ip_bits(dst) = bits;
 	ip_type(dst) = type;
@@ -110,19 +132,11 @@ Datum
 inet_out(PG_FUNCTION_ARGS)
 {
 	inet	   *src = PG_GETARG_INET_P(0);
-	char		tmp[sizeof("255.255.255.255/32")];
+	char		tmp[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
 	char	   *dst;
 	int			len;
 
-	if (ip_family(src) == AF_INET)
-	{
-		/* It's an IP V4 address: */
-
-		/*
-		 * Use inet style for both inet and cidr, since we don't want
-		 * abbreviated CIDR style here.
-		 */
-		dst = inet_net_ntop(AF_INET, &ip_v4addr(src), ip_bits(src),
+	dst = inet_net_ntop(ip_family(src), ip_addr(src), ip_bits(src),
 			    tmp, sizeof(tmp));
 	if (dst == NULL)
 		elog(ERROR, "unable to print address (%s)", strerror(errno));
@@ -132,10 +146,6 @@ inet_out(PG_FUNCTION_ARGS)
 		len = strlen(tmp);
 		snprintf(tmp + len, sizeof(tmp) - len, "/%u", ip_bits(src));
 	}
-	}
-	else
-		/* Go for an IPV6 address here, before faulting out: */
-		elog(ERROR, "unknown address family (%d)", ip_family(src));
 
 	PG_RETURN_CSTRING(pstrdup(tmp));
 }
@@ -172,7 +182,7 @@ inet_recv(PG_FUNCTION_ARGS)
 	if (ip_family(addr) != AF_INET)
 		elog(ERROR, "Invalid family in external inet");
 	bits = pq_getmsgbyte(buf);
-	if (bits < 0 || bits > 32)
+	if (bits < 0 || bits > ip_maxbits(addr))
 		elog(ERROR, "Invalid bits in external inet");
 	ip_bits(addr) = bits;
 	ip_type(addr) = pq_getmsgbyte(buf);
@@ -183,10 +193,10 @@ inet_recv(PG_FUNCTION_ARGS)
 		elog(ERROR, "Invalid length in external inet");
 
 	VARATT_SIZEP(addr) = VARHDRSZ
-		+ ((char *) &ip_v4addr(addr) - (char *) VARDATA(addr))
+		+ ((char *)ip_addr(addr) - (char *) VARDATA(addr))
 		+ ip_addrsize(addr);
 
-	addrptr = (char *) &ip_v4addr(addr);
+	addrptr = (char *)ip_addr(addr);
 	for (i = 0; i < nb; i++)
 		addrptr[i] = pq_getmsgbyte(buf);
 
@@ -196,7 +206,7 @@ inet_recv(PG_FUNCTION_ARGS)
 	 */
 	if (ip_type(addr))
 	{
-		if (!v4addressOK(ip_v4addr(addr), bits))
+		if (!addressOK(ip_addr(addr), bits, ip_family(addr)))
 			elog(ERROR, "invalid external CIDR value: has bits set to right of mask");
 	}
 
@@ -230,7 +240,7 @@ inet_send(PG_FUNCTION_ARGS)
 	if (nb < 0)
 		nb = 0;
 	pq_sendbyte(&buf, nb);
-	addrptr = (char *) &ip_v4addr(addr);
+	addrptr = (char *)ip_addr(addr);
 	for (i = 0; i < nb; i++)
 		pq_sendbyte(&buf, addrptr[i]);
 	PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
@@ -257,6 +267,7 @@ text_network(text *src, int type)
 	PG_RETURN_INET_P(network_in(str, type));
 }
 
+
 Datum
 text_cidr(PG_FUNCTION_ARGS)
 {
@@ -276,7 +287,10 @@ inet_set_masklen(PG_FUNCTION_ARGS)
 	int			bits = PG_GETARG_INT32(1);
 	inet	   *dst;
 
-	if ((bits < 0) || (bits > 32))		/* no support for v6 yet */
+        if ( bits == -1 )
+            bits = ip_maxbits(src);
+
+	if ((bits < 0) || (bits > ip_maxbits(src)))
 			elog(ERROR, "set_masklen - invalid value '%d'", bits);
 
 	/* clone the original data */
@@ -302,26 +316,21 @@ inet_set_masklen(PG_FUNCTION_ARGS)
 static int32
 network_cmp_internal(inet *a1, inet *a2)
 {
-	if (ip_family(a1) == AF_INET && ip_family(a2) == AF_INET)
+	if (ip_family(a1) == ip_family(a2))
 	{
 		int			order;
 
-		order = v4bitncmp(ip_v4addr(a1), ip_v4addr(a2),
+		order = bitncmp(ip_addr(a1), ip_addr(a2),
 				Min(ip_bits(a1), ip_bits(a2)));
 		if (order != 0)
 			return order;
 		order = ((int) ip_bits(a1)) - ((int) ip_bits(a2));
 		if (order != 0)
 			return order;
-		return v4bitncmp(ip_v4addr(a1), ip_v4addr(a2), 32);
-	}
-	else
-	{
-		/* Go for an IPV6 address here, before faulting out: */
-		elog(ERROR, "cannot compare address families %d and %d",
-			 ip_family(a1), ip_family(a2));
-		return 0;				/* keep compiler quiet */
+		return bitncmp(ip_addr(a1), ip_addr(a2), ip_maxbits(a1));
 	}
+
+	return ip_family(a1) - ip_family(a2);
 }
 
 Datum
@@ -399,18 +408,13 @@ network_sub(PG_FUNCTION_ARGS)
 	inet	   *a1 = PG_GETARG_INET_P(0);
 	inet	   *a2 = PG_GETARG_INET_P(1);
 
-	if ((ip_family(a1) == AF_INET) && (ip_family(a2) == AF_INET))
+	if (ip_family(a1) == ip_family(a2))
 	{
 		PG_RETURN_BOOL(ip_bits(a1) > ip_bits(a2)
-		   && v4bitncmp(ip_v4addr(a1), ip_v4addr(a2), ip_bits(a2)) == 0);
+		   && bitncmp(ip_addr(a1), ip_addr(a2), ip_bits(a2)) == 0);
 	}
-	else
-	{
-		/* Go for an IPV6 address here, before faulting out: */
-		elog(ERROR, "cannot compare address families %d and %d",
-			 ip_family(a1), ip_family(a2));
+
 	PG_RETURN_BOOL(false);
-	}
 }
 
 Datum
@@ -419,18 +423,13 @@ network_subeq(PG_FUNCTION_ARGS)
 	inet	   *a1 = PG_GETARG_INET_P(0);
 	inet	   *a2 = PG_GETARG_INET_P(1);
 
-	if ((ip_family(a1) == AF_INET) && (ip_family(a2) == AF_INET))
+	if (ip_family(a1) == ip_family(a2))
 	{
 		PG_RETURN_BOOL(ip_bits(a1) >= ip_bits(a2)
-		   && v4bitncmp(ip_v4addr(a1), ip_v4addr(a2), ip_bits(a2)) == 0);
+		   && bitncmp(ip_addr(a1), ip_addr(a2), ip_bits(a2)) == 0);
 	}
-	else
-	{
-		/* Go for an IPV6 address here, before faulting out: */
-		elog(ERROR, "cannot compare address families %d and %d",
-			 ip_family(a1), ip_family(a2));
+
 	PG_RETURN_BOOL(false);
-	}
 }
 
 Datum
@@ -439,18 +438,13 @@ network_sup(PG_FUNCTION_ARGS)
 	inet	   *a1 = PG_GETARG_INET_P(0);
 	inet	   *a2 = PG_GETARG_INET_P(1);
 
-	if ((ip_family(a1) == AF_INET) && (ip_family(a2) == AF_INET))
+	if (ip_family(a1) == ip_family(a2))
 	{
 		PG_RETURN_BOOL(ip_bits(a1) < ip_bits(a2)
-		   && v4bitncmp(ip_v4addr(a1), ip_v4addr(a2), ip_bits(a1)) == 0);
+		   && bitncmp(ip_addr(a1), ip_addr(a2), ip_bits(a1)) == 0);
 	}
-	else
-	{
-		/* Go for an IPV6 address here, before faulting out: */
-		elog(ERROR, "cannot compare address families %d and %d",
-			 ip_family(a1), ip_family(a2));
+
 	PG_RETURN_BOOL(false);
-	}
 }
 
 Datum
@@ -459,18 +453,13 @@ network_supeq(PG_FUNCTION_ARGS)
 	inet	   *a1 = PG_GETARG_INET_P(0);
 	inet	   *a2 = PG_GETARG_INET_P(1);
 
-	if ((ip_family(a1) == AF_INET) && (ip_family(a2) == AF_INET))
+	if (ip_family(a1) == ip_family(a2))
 	{
 		PG_RETURN_BOOL(ip_bits(a1) <= ip_bits(a2)
-		   && v4bitncmp(ip_v4addr(a1), ip_v4addr(a2), ip_bits(a1)) == 0);
+		   && bitncmp(ip_addr(a1), ip_addr(a2), ip_bits(a1)) == 0);
 	}
-	else
-	{
-		/* Go for an IPV6 address here, before faulting out: */
-		elog(ERROR, "cannot compare address families %d and %d",
-			 ip_family(a1), ip_family(a2));
+
 	PG_RETURN_BOOL(false);
-	}
 }
 
 /*
@@ -482,19 +471,13 @@ network_host(PG_FUNCTION_ARGS)
 	inet	   *ip = PG_GETARG_INET_P(0);
 	text	   *ret;
 	int			len;
-	char	   *ptr,
-				tmp[sizeof("255.255.255.255/32")];
+	char	   *ptr;
+	char		tmp[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
 
-	if (ip_family(ip) == AF_INET)
-	{
-		/* It's an IP V4 address: */
-		/* force display of 32 bits, regardless of masklen... */
-		if (inet_net_ntop(AF_INET, &ip_v4addr(ip), 32, tmp, sizeof(tmp)) == NULL)
+	/* force display of max bits, regardless of masklen... */
+	if (inet_net_ntop(ip_family(ip), ip_addr(ip), ip_maxbits(ip),
+			  tmp, sizeof(tmp)) == NULL)
 		elog(ERROR, "unable to print host (%s)", strerror(errno));
-	}
-	else
-		/* Go for an IPV6 address here, before faulting out: */
-		elog(ERROR, "unknown address family (%d)", ip_family(ip));
 
 	/* Suppress /n if present (shouldn't happen now) */
 	if ((ptr = strchr(tmp, '/')) != NULL)
@@ -514,13 +497,10 @@ network_show(PG_FUNCTION_ARGS)
 	inet	   *ip = PG_GETARG_INET_P(0);
 	text	   *ret;
 	int			len;
-	char		tmp[sizeof("255.255.255.255/32")];
+	char		tmp[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
 
-	if (ip_family(ip) == AF_INET)
-	{
-		/* It's an IP V4 address: */
-		/* force display of 32 bits, regardless of masklen... */
-		if (inet_net_ntop(AF_INET, &ip_v4addr(ip), 32, tmp, sizeof(tmp)) == NULL)
+	if (inet_net_ntop(ip_family(ip), ip_addr(ip), ip_maxbits(ip),
+			  tmp, sizeof(tmp)) == NULL)
 		elog(ERROR, "unable to print host (%s)", strerror(errno));
 	/* Add /n if not present (which it won't be) */
 	if (strchr(tmp, '/') == NULL)
@@ -528,10 +508,6 @@ network_show(PG_FUNCTION_ARGS)
 		len = strlen(tmp);
 		snprintf(tmp + len, sizeof(tmp) - len, "/%u", ip_bits(ip));
 	}
-	}
-	else
-		/* Go for an IPV6 address here, before faulting out: */
-		elog(ERROR, "unknown address family (%d)", ip_family(ip));
 
 	/* Return string as a text datum */
 	len = strlen(tmp);
@@ -548,24 +524,18 @@ network_abbrev(PG_FUNCTION_ARGS)
 	text	   *ret;
 	char	   *dst;
 	int			len;
-	char		tmp[sizeof("255.255.255.255/32")];
+	char		tmp[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
 
-	if (ip_family(ip) == AF_INET)
-	{
-		/* It's an IP V4 address: */
 	if (ip_type(ip))
-			dst = inet_cidr_ntop(AF_INET, &ip_v4addr(ip), ip_bits(ip),
-								 tmp, sizeof(tmp));
+		dst = inet_cidr_ntop(ip_family(ip), ip_addr(ip),
+				     ip_bits(ip), tmp, sizeof(tmp));
 	else
-			dst = inet_net_ntop(AF_INET, &ip_v4addr(ip), ip_bits(ip),
-								tmp, sizeof(tmp));
+		dst = inet_net_ntop(ip_family(ip), ip_addr(ip),
+				    ip_bits(ip), tmp, sizeof(tmp));
 
 	if (dst == NULL)
-			elog(ERROR, "unable to print address (%s)", strerror(errno));
-	}
-	else
-		/* Go for an IPV6 address here, before faulting out: */
-		elog(ERROR, "unknown address family (%d)", ip_family(ip));
+		elog(ERROR, "unable to print address (%s)",
+		     strerror(errno));
 
 	/* Return string as a text datum */
 	len = strlen(tmp);
@@ -583,40 +553,67 @@ network_masklen(PG_FUNCTION_ARGS)
 	PG_RETURN_INT32(ip_bits(ip));
 }
 
+Datum
+network_family(PG_FUNCTION_ARGS)
+{
+	inet       *ip = PG_GETARG_INET_P(0);
+
+	switch (ip_family(ip)) {
+	case PGSQL_AF_INET:
+		PG_RETURN_INT32(4);
+		break;
+	case PGSQL_AF_INET6:
+		PG_RETURN_INT32(6);
+		break;
+	default:
+		PG_RETURN_INT32(0);
+		break;
+	}
+}
+
 Datum
 network_broadcast(PG_FUNCTION_ARGS)
 {
 	inet	   *ip = PG_GETARG_INET_P(0);
 	inet	   *dst;
+	int byte;
+	int bits;
+	int maxbytes;
+	unsigned char mask;
+	unsigned char *a, *b;
 
 	/* make sure any unused bits are zeroed */
 	dst = (inet *) palloc0(VARHDRSZ + sizeof(inet_struct));
 
-	if (ip_family(ip) == AF_INET)
-	{
-		/* It's an IP V4 address: */
-		unsigned long mask = 0xffffffff;
+	if (ip_family(ip) == PGSQL_AF_INET) {
+		maxbytes = 4;
+	} else {
+		maxbytes = 16;
+	}
 
-		/*
-		 * Shifting by 32 or more bits does not yield portable results, so
-		 * don't try it.
-		 */
-		if (ip_bits(ip) < 32)
-			mask >>= ip_bits(ip);
-		else
-			mask = 0;
+	bits = ip_bits(ip);
+	a = ip_addr(ip);
+	b = ip_addr(dst);
+
+	for (byte = 0 ; byte < maxbytes ; byte++) {
+		if (bits >= 8) {
+			mask = 0x00;
+			bits -= 8;
+		} else if (bits == 0) {
+			mask = 0xff;
+		} else {
+			mask = 0xff >> bits;
+			bits = 0;
+		}
 
-		ip_v4addr(dst) = htonl(ntohl(ip_v4addr(ip)) | mask);
+		b[byte] = a[byte] | mask;
         }
-	else
-		/* Go for an IPV6 address here, before faulting out: */
-		elog(ERROR, "unknown address family (%d)", ip_family(ip));
 
 	ip_family(dst) = ip_family(ip);
 	ip_bits(dst) = ip_bits(ip);
 	ip_type(dst) = 0;
 	VARATT_SIZEP(dst) = VARHDRSZ
-		+ ((char *) &ip_v4addr(dst) - (char *) VARDATA(dst))
+		+ ((char *) ip_addr(dst) - (char *) VARDATA(dst))
 		+ ip_addrsize(dst);
 
 	PG_RETURN_INET_P(dst);
@@ -627,35 +624,44 @@ network_network(PG_FUNCTION_ARGS)
 {
 	inet	   *ip = PG_GETARG_INET_P(0);
 	inet	   *dst;
+	int byte;
+	int bits;
+	int maxbytes;
+	unsigned char mask;
+	unsigned char *a, *b;
 
 	/* make sure any unused bits are zeroed */
 	dst = (inet *) palloc0(VARHDRSZ + sizeof(inet_struct));
 
-	if (ip_family(ip) == AF_INET)
-	{
-		/* It's an IP V4 address: */
-		unsigned long mask = 0xffffffff;
+	if (ip_family(ip) == PGSQL_AF_INET) {
+		maxbytes = 4;
+	} else {
+		maxbytes = 16;
+	}
 
-		/*
-		 * Shifting by 32 or more bits does not yield portable results, so
-		 * don't try it.
-		 */
-		if (ip_bits(ip) > 0)
-			mask <<= (32 - ip_bits(ip));
-		else
-			mask = 0;
+	bits = ip_bits(ip);
+	a = ip_addr(ip);
+	b = ip_addr(dst);
+
+	byte = 0;
+	while (bits) {
+		if (bits >= 8) {
+			mask = 0xff;
+			bits -= 8;
+		} else {
+			mask = 0xff << (8 - bits);
+			bits = 0;
+		}
 
-		ip_v4addr(dst) = htonl(ntohl(ip_v4addr(ip)) & mask);
+		b[byte] = a[byte] & mask;
+		byte++;
         }
-	else
-		/* Go for an IPV6 address here, before faulting out: */
-		elog(ERROR, "unknown address family (%d)", ip_family(ip));
 
 	ip_family(dst) = ip_family(ip);
 	ip_bits(dst) = ip_bits(ip);
 	ip_type(dst) = 1;
 	VARATT_SIZEP(dst) = VARHDRSZ
-		+ ((char *) &ip_v4addr(dst) - (char *) VARDATA(dst))
+		+ ((char *) ip_addr(dst) - (char *) VARDATA(dst))
 		+ ip_addrsize(dst);
 
 	PG_RETURN_INET_P(dst);
@@ -666,36 +672,43 @@ network_netmask(PG_FUNCTION_ARGS)
 {
 	inet	   *ip = PG_GETARG_INET_P(0);
 	inet	   *dst;
+	int byte;
+	int bits;
+	int maxbytes;
+	unsigned char mask;
+	unsigned char *b;
 
 	/* make sure any unused bits are zeroed */
 	dst = (inet *) palloc0(VARHDRSZ + sizeof(inet_struct));
 
-	if (ip_family(ip) == AF_INET)
-	{
-		/* It's an IP V4 address: */
-		unsigned long mask = 0xffffffff;
-
-		/*
-		 * Shifting by 32 or more bits does not yield portable results, so
-		 * don't try it.
-		 */
-		if (ip_bits(ip) > 0)
-			mask <<= (32 - ip_bits(ip));
-		else
-			mask = 0;
+	if (ip_family(ip) == PGSQL_AF_INET) {
+		maxbytes = 4;
+	} else {
+		maxbytes = 16;
+	}
 
-		ip_v4addr(dst) = htonl(mask);
+	bits = ip_bits(ip);
+	b = ip_addr(dst);
+
+	byte = 0;
+	while (bits) {
+		if (bits >= 8) {
+			mask = 0xff;
+			bits -= 8;
+		} else {
+			mask = 0xff << (8 - bits);
+			bits = 0;
+		}
 
-		ip_bits(dst) = 32;
+		b[byte] = mask;
+		byte++;
         }
-	else
-		/* Go for an IPV6 address here, before faulting out: */
-		elog(ERROR, "unknown address family (%d)", ip_family(ip));
 
 	ip_family(dst) = ip_family(ip);
+	ip_bits(dst) = ip_bits(ip);
 	ip_type(dst) = 0;
 	VARATT_SIZEP(dst) = VARHDRSZ
-		+ ((char *) &ip_v4addr(dst) - (char *) VARDATA(dst))
+		+ ((char *)ip_addr(dst) - (char *) VARDATA(dst))
 		+ ip_addrsize(dst);
 
 	PG_RETURN_INET_P(dst);
@@ -706,36 +719,43 @@ network_hostmask(PG_FUNCTION_ARGS)
 {
 	inet	   *ip = PG_GETARG_INET_P(0);
 	inet	   *dst;
+	int byte;
+	int bits;
+	int maxbytes;
+	unsigned char mask;
+	unsigned char *b;
 
 	/* make sure any unused bits are zeroed */
 	dst = (inet *) palloc0(VARHDRSZ + sizeof(inet_struct));
 
-	if (ip_family(ip) == AF_INET)
-	{
-		/* It's an IP V4 address: */
-		unsigned long mask = 0xffffffff;
-
-		/*
-		 * Only shift if the mask len is < 32 bits ..
-		 */
-
-		if (ip_bits(ip) < 32)
-			mask >>= ip_bits(ip);
-		else
-			mask = 0;
+	if (ip_family(ip) == PGSQL_AF_INET) {
+		maxbytes = 4;
+	} else {
+		maxbytes = 16;
+	}
 
-		ip_v4addr(dst) = htonl(mask);
+	bits = ip_maxbits(ip) - ip_bits(ip);
+	b = ip_addr(dst);
+
+	byte = maxbytes - 1;
+	while (bits) {
+		if (bits >= 8) {
+			mask = 0xff;
+			bits -= 8;
+		} else {
+			mask = 0xff >> (8 - bits);
+			bits = 0;
+		}
 
-		ip_bits(dst) = 32;
+		b[byte] = mask;
+		byte--;
         }
-	else
-		/* Go for an IPV6 address here, before faulting out: */
-		elog(ERROR, "unknown address family (%d)", ip_family(ip));
 
 	ip_family(dst) = ip_family(ip);
+	ip_bits(dst) = ip_bits(ip);
 	ip_type(dst) = 0;
 	VARATT_SIZEP(dst) = VARHDRSZ
-		+ ((char *) &ip_v4addr(dst) - (char *) VARDATA(dst))
+		+ ((char *)ip_addr(dst) - (char *) VARDATA(dst))
 		+ ip_addrsize(dst);
 
 	PG_RETURN_INET_P(dst);
@@ -760,12 +780,26 @@ convert_network_to_scalar(Datum value, Oid typid)
 		case CIDROID:
 			{
 				inet	   *ip = DatumGetInetP(value);
+				int len;
+				double res;
+				int i;
 
-				if (ip_family(ip) == AF_INET)
-					return (double) ip_v4addr(ip);
+				/*
+				 * Note that we don't use the full address
+				 * here.
+				 */
+				if (ip_family(ip) == PGSQL_AF_INET)
+					len = 4;
 				else
-					/* Go for an IPV6 address here, before faulting out: */
-					elog(ERROR, "unknown address family (%d)", ip_family(ip));
+					len = 5;
+
+				res = ip_family(ip);
+				for (i = 0 ; i < len ; i++) {
+					res *= 256;
+					res += ip_addr(ip)[i];
+				}
+				return res;
+
 				break;
 			}
 		case MACADDROID:
@@ -788,53 +822,80 @@ convert_network_to_scalar(Datum value, Oid typid)
 	return 0;
 }
 
-
 /*
- *	Bitwise comparison for V4 addresses.  Add V6 implementation!
+ * int
+ * bitncmp(l, r, n)
+ *      compare bit masks l and r, for n bits.
+ * return:
+ *      -1, 1, or 0 in the libc tradition.
+ * note:
+ *      network byte order assumed.  this means 192.5.5.240/28 has
+ *      0x11110000 in its fourth octet.
+ * author:
+ *      Paul Vixie (ISC), June 1996
  */
-
 static int
-v4bitncmp(unsigned long a1, unsigned long a2, int bits)
+bitncmp(void *l, void *r, int n)
 {
-	unsigned long mask;
+	u_int lb, rb;
+	int x, b;
 
-	/*
-	 * Shifting by 32 or more bits does not yield portable results, so
-	 * don't try it.
-	 */
-	if (bits > 0)
-		mask = (0xFFFFFFFFL << (32 - bits)) & 0xFFFFFFFFL;
-	else
-		mask = 0;
-	a1 = ntohl(a1);
-	a2 = ntohl(a2);
-	if ((a1 & mask) < (a2 & mask))
-		return (-1);
-	else if ((a1 & mask) > (a2 & mask))
+	b = n / 8;
+	x = memcmp(l, r, b);
+	if (x)
+		return (x);
+
+	lb = ((const u_char *)l)[b];
+	rb = ((const u_char *)r)[b];
+	for (b = n % 8; b > 0; b--) {
+		if ((lb & 0x80) != (rb & 0x80)) {
+			if (lb & 0x80)
 				return (1);
+			return (-1);
+		}
+		lb <<= 1;
+		rb <<= 1;
+	}
 	return (0);
 }
 
-/*
- * Returns true if given address fits fully within the specified bit width.
- */
 static bool
-v4addressOK(unsigned long a1, int bits)
-{
-	unsigned long mask;
+addressOK(unsigned char *a, int bits, int family)
+{
+	int byte;
+	int nbits;
+	int maxbits;
+	int maxbytes;
+	unsigned char mask;
+
+	if (family == PGSQL_AF_INET) {
+		maxbits = 32;
+		maxbytes = 4;
+	} else {
+		maxbits = 128;
+		maxbytes = 16;
+	}
+#if 0
+	assert(bits <= maxbits);
+#endif
 
-	/*
-	 * Shifting by 32 or more bits does not yield portable results, so
-	 * don't try it.
-	 */
-	if (bits > 0)
-		mask = (0xFFFFFFFFL << (32 - bits)) & 0xFFFFFFFFL;
-	else
-		mask = 0;
-	a1 = ntohl(a1);
-	if ((a1 & mask) == a1)
-		return true;
-	return false;
+	if (bits == maxbits)
+		return 1;
+
+	byte = (bits + 7) / 8;
+	nbits = bits % 8;
+	mask = 0xff;
+	if (bits != 0)
+		mask >>= nbits;
+
+	while (byte < maxbytes) {
+		if ((a[byte] & mask) != 0)
+			return 0;
+		mask = 0xff;
+		byte++;
+	}
+
+	return 1;
 }
 
 
@@ -852,15 +913,16 @@ network_scan_first(Datum in)
 
 /*
  * return "last" IP on a given network. It's the broadcast address,
- * however, masklen has to be set to 32, since
+ * however, masklen has to be set to its max btis, since
  * 192.168.0.255/24 is considered less than 192.168.0.255/32
  *
- * NB: this is not IPv6 ready ...
+ * inet_set_masklen() hacked to max out the masklength to 128 for IPv6
+ * and 32 for IPv4 when given '-1' as argument.
  */
 Datum
 network_scan_last(Datum in)
 {
 	return DirectFunctionCall2(inet_set_masklen,
 							   DirectFunctionCall1(network_broadcast, in),
-							   Int32GetDatum(32));
+			   Int32GetDatum(-1));
 }

src/include/catalog/pg_proc.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: pg_proc.h,v 1.304 2003/06/22 22:04:55 tgl Exp $
+ * $Id: pg_proc.h,v 1.305 2003/06/24 22:21:23 momjian Exp $
  *
  * NOTES
  *	  The script catalog/genbki.sh reads this file and generates .bki
@@ -2369,6 +2369,8 @@ DESCR("is-supernet-or-equal");
 /* inet/cidr functions */
 DATA(insert OID = 605 (  abbrev				PGNSP PGUID 12 f f t f i 1 25 "869"  network_abbrev - _null_ ));
 DESCR("abbreviated display of inet/cidr value");
+DATA(insert OID = 711 (  family				PGNSP PGUID 12 f f t f i 1 23 "869"  network_family - _null_ ));
+DESCR("return address family (4 for IPv4, 6 for IPv6)");
 DATA(insert OID = 683 (  network			PGNSP PGUID 12 f f t f i 1 650 "869"	network_network - _null_ ));
 DESCR("network part of address");
 DATA(insert OID = 696 (  netmask			PGNSP PGUID 12 f f t f i 1 869 "869"	network_netmask - _null_ ));

src/include/utils/builtins.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: builtins.h,v 1.219 2003/05/26 00:11:28 tgl Exp $
+ * $Id: builtins.h,v 1.220 2003/06/24 22:21:23 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -644,6 +644,7 @@ extern Datum network_network(PG_FUNCTION_ARGS);
 extern Datum network_netmask(PG_FUNCTION_ARGS);
 extern Datum network_hostmask(PG_FUNCTION_ARGS);
 extern Datum network_masklen(PG_FUNCTION_ARGS);
+extern Datum network_family(PG_FUNCTION_ARGS);
 extern Datum network_broadcast(PG_FUNCTION_ARGS);
 extern Datum network_host(PG_FUNCTION_ARGS);
 extern Datum network_show(PG_FUNCTION_ARGS);

src/include/utils/inet.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: inet.h,v 1.13 2002/06/20 20:29:53 momjian Exp $
+ * $Id: inet.h,v 1.14 2003/06/24 22:21:23 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -23,13 +23,19 @@ typedef struct
 	unsigned char family;
 	unsigned char bits;
 	unsigned char type;
-	union
-	{
-		unsigned int ipv4_addr; /* network byte order */
-		/* add IPV6 address type here */
-	}			addr;
+	unsigned char ip_addr[16]; /* 128 bits of address */
 } inet_struct;
 
+/*
+ * Referencing all of the non-AF_INET types to AF_INET lets us work on
+ * machines which may not have the appropriate address family (like
+ * inet6 addresses when AF_INET6 isn't present) but doesn't cause a
+ * dump/reload requirement.  Existing databases used AF_INET for the family
+ * type on disk.
+ */
+#define PGSQL_AF_INET	(AF_INET + 0)
+#define PGSQL_AF_INET6	(AF_INET + 1)
+
 /*
  * Both INET and CIDR addresses are represented within Postgres as varlena
  * objects, ie, there is a varlena header (basically a length word) in front

src/test/regress/expected/inet.out

@@ -19,15 +19,22 @@ INSERT INTO INET_TBL (c, i) VALUES ('10.1', '10.1.2.3/16');
 INSERT INTO INET_TBL (c, i) VALUES ('10', '10.1.2.3/8');
 INSERT INTO INET_TBL (c, i) VALUES ('10', '11.1.2.3/8');
 INSERT INTO INET_TBL (c, i) VALUES ('10', '9.1.2.3/8');
+INSERT INTO INET_TBL (c, i) VALUES ('10:23::f1', '10:23::f1/64');
+INSERT INTO INET_TBL (c, i) VALUES ('10:23::8000/113', '10:23::ffff');
+INSERT INTO INET_TBL (c, i) VALUES ('::ffff:1.2.3.4', '::4.3.2.1/24');
 -- check that CIDR rejects invalid input:
 INSERT INTO INET_TBL (c, i) VALUES ('192.168.1.2/24', '192.168.1.226');
 ERROR:  invalid CIDR value '192.168.1.2/24': has bits set to right of mask
+INSERT INTO INET_TBL (c, i) VALUES ('1234::1234::1234', '::1.2.3.4');
+ERROR:  invalid CIDR value '1234::1234::1234'
 -- check that CIDR rejects invalid input when converting from text:
 INSERT INTO INET_TBL (c, i) VALUES (cidr('192.168.1.2/24'), '192.168.1.226');
 ERROR:  invalid CIDR value '192.168.1.2/24': has bits set to right of mask
+INSERT INTO INET_TBL (c, i) VALUES (cidr('ffff:ffff:ffff:ffff::/24'), '::192.168.1.226');
+ERROR:  invalid CIDR value 'ffff:ffff:ffff:ffff::/24': has bits set to right of mask
 SELECT '' AS ten, c AS cidr, i AS inet FROM INET_TBL;
  ten |      cidr          |       inet       
------+----------------+------------------
+-----+--------------------+------------------
      | 192.168.1.0/24     | 192.168.1.226/24
      | 192.168.1.0/24     | 192.168.1.226
      | 192.168.1.0/24     | 192.168.1.0/24
@@ -42,32 +49,38 @@ SELECT '' AS ten, c AS cidr, i AS inet FROM INET_TBL;
      | 10.0.0.0/8         | 10.1.2.3/8
      | 10.0.0.0/8         | 11.1.2.3/8
      | 10.0.0.0/8         | 9.1.2.3/8
-(14 rows)
+     | 10:23::f1/128      | 10:23::f1/64
+     | 10:23::8000/113    | 10:23::ffff
+     | ::ffff:1.2.3.4/128 | ::4.3.2.1/24
+(17 rows)
 
 -- now test some support functions
-SELECT '' AS ten, i AS inet, host(i), text(i) FROM INET_TBL;
- ten |       inet       |     host      |       text       
------+------------------+---------------+------------------
-     | 192.168.1.226/24 | 192.168.1.226 | 192.168.1.226/24
-     | 192.168.1.226    | 192.168.1.226 | 192.168.1.226/32
-     | 192.168.1.0/24   | 192.168.1.0   | 192.168.1.0/24
-     | 192.168.1.0/25   | 192.168.1.0   | 192.168.1.0/25
-     | 192.168.1.255/24 | 192.168.1.255 | 192.168.1.255/24
-     | 192.168.1.255/25 | 192.168.1.255 | 192.168.1.255/25
-     | 10.1.2.3/8       | 10.1.2.3      | 10.1.2.3/8
-     | 10.1.2.3/8       | 10.1.2.3      | 10.1.2.3/8
-     | 10.1.2.3         | 10.1.2.3      | 10.1.2.3/32
-     | 10.1.2.3/24      | 10.1.2.3      | 10.1.2.3/24
-     | 10.1.2.3/16      | 10.1.2.3      | 10.1.2.3/16
-     | 10.1.2.3/8       | 10.1.2.3      | 10.1.2.3/8
-     | 11.1.2.3/8       | 11.1.2.3      | 11.1.2.3/8
-     | 9.1.2.3/8        | 9.1.2.3       | 9.1.2.3/8
-(14 rows)
+SELECT '' AS ten, i AS inet, host(i), text(i), family(i) FROM INET_TBL;
+ ten |       inet       |     host      |       text       | family
+-----+------------------+---------------+------------------+--------
+     | 192.168.1.226/24 | 192.168.1.226 | 192.168.1.226/24 |      4
+     | 192.168.1.226    | 192.168.1.226 | 192.168.1.226/32 |      4
+     | 192.168.1.0/24   | 192.168.1.0   | 192.168.1.0/24   |      4
+     | 192.168.1.0/25   | 192.168.1.0   | 192.168.1.0/25   |      4
+     | 192.168.1.255/24 | 192.168.1.255 | 192.168.1.255/24 |      4
+     | 192.168.1.255/25 | 192.168.1.255 | 192.168.1.255/25 |      4
+     | 10.1.2.3/8       | 10.1.2.3      | 10.1.2.3/8       |      4
+     | 10.1.2.3/8       | 10.1.2.3      | 10.1.2.3/8       |      4
+     | 10.1.2.3         | 10.1.2.3      | 10.1.2.3/32      |      4
+     | 10.1.2.3/24      | 10.1.2.3      | 10.1.2.3/24      |      4
+     | 10.1.2.3/16      | 10.1.2.3      | 10.1.2.3/16      |      4
+     | 10.1.2.3/8       | 10.1.2.3      | 10.1.2.3/8       |      4
+     | 11.1.2.3/8       | 11.1.2.3      | 11.1.2.3/8       |      4
+     | 9.1.2.3/8        | 9.1.2.3       | 9.1.2.3/8        |      4
+     | 10:23::f1/64     | 10:23::f1     | 10:23::f1/64     |      6
+     | 10:23::ffff      | 10:23::ffff   | 10:23::ffff/128  |      6
+     | ::4.3.2.1/24     | ::4.3.2.1     | ::4.3.2.1/24     |      6
+(17 rows)
 
 SELECT '' AS ten, c AS cidr, broadcast(c),
   i AS inet, broadcast(i) FROM INET_TBL;
  ten |      cidr          |    broadcast     |       inet       |               broadcast               
------+----------------+------------------+------------------+------------------
+-----+--------------------+------------------+------------------+---------------------------------------
      | 192.168.1.0/24     | 192.168.1.255/24 | 192.168.1.226/24 | 192.168.1.255/24
      | 192.168.1.0/24     | 192.168.1.255/24 | 192.168.1.226    | 192.168.1.226
      | 192.168.1.0/24     | 192.168.1.255/24 | 192.168.1.0/24   | 192.168.1.255/24
@@ -82,12 +95,15 @@ SELECT '' AS ten, c AS cidr, broadcast(c),
      | 10.0.0.0/8         | 10.255.255.255/8 | 10.1.2.3/8       | 10.255.255.255/8
      | 10.0.0.0/8         | 10.255.255.255/8 | 11.1.2.3/8       | 11.255.255.255/8
      | 10.0.0.0/8         | 10.255.255.255/8 | 9.1.2.3/8        | 9.255.255.255/8
-(14 rows)
+     | 10:23::f1/128      | 10:23::f1        | 10:23::f1/64     | 10:23::ffff:ffff:ffff:ffff/64
+     | 10:23::8000/113    | 10:23::ffff/113  | 10:23::ffff      | 10:23::ffff
+     | ::ffff:1.2.3.4/128 | ::ffff:1.2.3.4   | ::4.3.2.1/24     | 0:ff:ffff:ffff:ffff:ffff:ffff:ffff/24
+(17 rows)
 
 SELECT '' AS ten, c AS cidr, network(c) AS "network(cidr)",
   i AS inet, network(i) AS "network(inet)" FROM INET_TBL;
  ten |        cidr        |  network(cidr)     |       inet       |  network(inet)   
------+----------------+----------------+------------------+------------------
+-----+--------------------+--------------------+------------------+------------------
      | 192.168.1.0/24     | 192.168.1.0/24     | 192.168.1.226/24 | 192.168.1.0/24
      | 192.168.1.0/24     | 192.168.1.0/24     | 192.168.1.226    | 192.168.1.226/32
      | 192.168.1.0/24     | 192.168.1.0/24     | 192.168.1.0/24   | 192.168.1.0/24
@@ -102,12 +118,15 @@ SELECT '' AS ten, c AS cidr, network(c) AS "network(cidr)",
      | 10.0.0.0/8         | 10.0.0.0/8         | 10.1.2.3/8       | 10.0.0.0/8
      | 10.0.0.0/8         | 10.0.0.0/8         | 11.1.2.3/8       | 11.0.0.0/8
      | 10.0.0.0/8         | 10.0.0.0/8         | 9.1.2.3/8        | 9.0.0.0/8
-(14 rows)
+     | 10:23::f1/128      | 10:23::f1/128      | 10:23::f1/64     | 10:23::/64
+     | 10:23::8000/113    | 10:23::8000/113    | 10:23::ffff      | 10:23::ffff/128
+     | ::ffff:1.2.3.4/128 | ::ffff:1.2.3.4/128 | ::4.3.2.1/24     | ::/24
+(17 rows)
 
 SELECT '' AS ten, c AS cidr, masklen(c) AS "masklen(cidr)",
   i AS inet, masklen(i) AS "masklen(inet)" FROM INET_TBL;
  ten |        cidr        | masklen(cidr) |       inet       | masklen(inet) 
------+----------------+---------------+------------------+---------------
+-----+--------------------+---------------+------------------+---------------
      | 192.168.1.0/24     |            24 | 192.168.1.226/24 |            24
      | 192.168.1.0/24     |            24 | 192.168.1.226    |            32
      | 192.168.1.0/24     |            24 | 192.168.1.0/24   |            24
@@ -122,7 +141,10 @@ SELECT '' AS ten, c AS cidr, masklen(c) AS "masklen(cidr)",
      | 10.0.0.0/8         |             8 | 10.1.2.3/8       |             8
      | 10.0.0.0/8         |             8 | 11.1.2.3/8       |             8
      | 10.0.0.0/8         |             8 | 9.1.2.3/8        |             8
-(14 rows)
+     | 10:23::f1/128      |           128 | 10:23::f1/64     |            64
+     | 10:23::8000/113    |           113 | 10:23::ffff      |           128
+     | ::ffff:1.2.3.4/128 |           128 | ::4.3.2.1/24     |            24
+(17 rows)
 
 SELECT '' AS four, c AS cidr, masklen(c) AS "masklen(cidr)",
   i AS inet, masklen(i) AS "masklen(inet)" FROM INET_TBL
@@ -150,7 +172,7 @@ SELECT '' AS ten, i, c,
   i >> c AS sup, i >>= c AS spe
   FROM INET_TBL;
  ten |        i         |       c            | lt | le | eq | ge | gt | ne | sb | sbe | sup | spe 
------+------------------+----------------+----+----+----+----+----+----+----+-----+-----+-----
+-----+------------------+--------------------+----+----+----+----+----+----+----+-----+-----+-----
      | 192.168.1.226/24 | 192.168.1.0/24     | f  | f  | f  | t  | t  | t  | f  | t   | f   | t
      | 192.168.1.226    | 192.168.1.0/24     | f  | f  | f  | t  | t  | t  | t  | t   | f   | f
      | 192.168.1.0/24   | 192.168.1.0/24     | f  | t  | t  | t  | f  | f  | f  | t   | f   | t
@@ -165,7 +187,10 @@ SELECT '' AS ten, i, c,
      | 10.1.2.3/8       | 10.0.0.0/8         | f  | f  | f  | t  | t  | t  | f  | t   | f   | t
      | 11.1.2.3/8       | 10.0.0.0/8         | f  | f  | f  | t  | t  | t  | f  | f   | f   | f
      | 9.1.2.3/8        | 10.0.0.0/8         | t  | t  | f  | f  | f  | t  | f  | f   | f   | f
-(14 rows)
+     | 10:23::f1/64     | 10:23::f1/128      | t  | t  | f  | f  | f  | t  | f  | f   | t   | t
+     | 10:23::ffff      | 10:23::8000/113    | f  | f  | f  | t  | t  | t  | t  | t   | f   | f
+     | ::4.3.2.1/24     | ::ffff:1.2.3.4/128 | t  | t  | f  | f  | f  | t  | f  | f   | t   | t
+(17 rows)
 
 -- check the conversion to/from text and set_netmask
 SELECT '' AS ten, set_masklen(inet(text(i)), 24) FROM INET_TBL;
@@ -185,7 +210,10 @@ SELECT '' AS ten, set_masklen(inet(text(i)), 24) FROM INET_TBL;
      | 10.1.2.3/24
      | 11.1.2.3/24
      | 9.1.2.3/24
-(14 rows)
+     | 10:23::f1/24
+     | 10:23::ffff/24
+     | ::4.3.2.1/24
+(17 rows)
 
 -- check that index works correctly
 CREATE INDEX inet_idx1 ON inet_tbl(i);

src/test/regress/sql/inet.sql

@@ -20,16 +20,20 @@ INSERT INTO INET_TBL (c, i) VALUES ('10.1', '10.1.2.3/16');
 INSERT INTO INET_TBL (c, i) VALUES ('10', '10.1.2.3/8');
 INSERT INTO INET_TBL (c, i) VALUES ('10', '11.1.2.3/8');
 INSERT INTO INET_TBL (c, i) VALUES ('10', '9.1.2.3/8');
+INSERT INTO INET_TBL (c, i) VALUES ('10:23::f1', '10:23::f1/64');
+INSERT INTO INET_TBL (c, i) VALUES ('10:23::8000/113', '10:23::ffff');
+INSERT INTO INET_TBL (c, i) VALUES ('::ffff:1.2.3.4', '::4.3.2.1/24');
 -- check that CIDR rejects invalid input:
 INSERT INTO INET_TBL (c, i) VALUES ('192.168.1.2/24', '192.168.1.226');
+INSERT INTO INET_TBL (c, i) VALUES ('1234::1234::1234', '::1.2.3.4');
 -- check that CIDR rejects invalid input when converting from text:
 INSERT INTO INET_TBL (c, i) VALUES (cidr('192.168.1.2/24'), '192.168.1.226');
-
+INSERT INTO INET_TBL (c, i) VALUES (cidr('ffff:ffff:ffff:ffff::/24'), '::192.168.1.226');
 SELECT '' AS ten, c AS cidr, i AS inet FROM INET_TBL;
 
 -- now test some support functions
 
-SELECT '' AS ten, i AS inet, host(i), text(i) FROM INET_TBL;
+SELECT '' AS ten, i AS inet, host(i), text(i), family(i) FROM INET_TBL;
 SELECT '' AS ten, c AS cidr, broadcast(c),
   i AS inet, broadcast(i) FROM INET_TBL;
 SELECT '' AS ten, c AS cidr, network(c) AS "network(cidr)",