network.c 29.74 KiB
/*
* PostgreSQL type definitions for the INET and CIDR types.
*
* $PostgreSQL: pgsql/src/backend/utils/adt/network.c,v 1.65 2006/02/11 20:39:58 tgl Exp $
*
* Jon Postel RIP 16 Oct 1998
*/
#include "postgres.h"
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "access/hash.h"
#include "catalog/pg_type.h"
#include "libpq/ip.h"
#include "libpq/libpq-be.h"
#include "libpq/pqformat.h"
#include "miscadmin.h"
#include "utils/builtins.h"
#include "utils/inet.h"
static inet *text_network(text *src, bool is_cidr);
static int32 network_cmp_internal(inet *a1, inet *a2);
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);
static inet *internal_inetpl(inet *ip, int64 addend);
/*
* Access macros.
*/
#define ip_family(inetptr) \
(((inet_struct *)VARDATA(inetptr))->family)
#define ip_bits(inetptr) \
(((inet_struct *)VARDATA(inetptr))->bits)
#define ip_addr(inetptr) \
(((inet_struct *)VARDATA(inetptr))->ipaddr)
#define ip_maxbits(inetptr) \
(ip_family(inetptr) == PGSQL_AF_INET ? 32 : 128)
/*
* 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 0;
}
}
/*
* Common INET/CIDR input routine
*/
static inet *
network_in(char *src, bool is_cidr)
{ int bits;
inet *dst;
dst = (inet *) palloc0(VARHDRSZ + sizeof(inet_struct));
/*
* 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),
is_cidr ? ip_addrsize(dst) : -1);
if ((bits < 0) || (bits > ip_maxbits(dst)))
ereport(ERROR,
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
/* translator: first %s is inet or cidr */
errmsg("invalid input syntax for type %s: \"%s\"",
is_cidr ? "cidr" : "inet", src)));
/*
* Error check: CIDR values must not have any bits set beyond the masklen.
*/
if (is_cidr)
{
if (!addressOK(ip_addr(dst), bits, ip_family(dst)))
ereport(ERROR,
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
errmsg("invalid cidr value: \"%s\"", src),
errdetail("Value has bits set to right of mask.")));
}
VARATT_SIZEP(dst) = VARHDRSZ +
((char *) ip_addr(dst) - (char *) VARDATA(dst)) +
ip_addrsize(dst);
ip_bits(dst) = bits;
return dst;
}
Datum
inet_in(PG_FUNCTION_ARGS)
{
char *src = PG_GETARG_CSTRING(0);
PG_RETURN_INET_P(network_in(src, false));
}
Datum
cidr_in(PG_FUNCTION_ARGS)
{
char *src = PG_GETARG_CSTRING(0);
PG_RETURN_INET_P(network_in(src, true));
}
/*
* Common INET/CIDR output routine
*/
static char *
network_out(inet *src, bool is_cidr)
{
char tmp[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
char *dst; int len;
dst = inet_net_ntop(ip_family(src), ip_addr(src), ip_bits(src),
tmp, sizeof(tmp));
if (dst == NULL)
ereport(ERROR,
(errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
errmsg("could not format inet value: %m")));
/* For CIDR, add /n if not present */
if (is_cidr && strchr(tmp, '/') == NULL)
{
len = strlen(tmp);
snprintf(tmp + len, sizeof(tmp) - len, "/%u", ip_bits(src));
}
return pstrdup(tmp);
}
Datum
inet_out(PG_FUNCTION_ARGS)
{
inet *src = PG_GETARG_INET_P(0);
PG_RETURN_CSTRING(network_out(src, false));
}
Datum
cidr_out(PG_FUNCTION_ARGS)
{
inet *src = PG_GETARG_INET_P(0);
PG_RETURN_CSTRING(network_out(src, true));
}
/*
* network_recv - converts external binary format to inet
*
* The external representation is (one byte apiece for)
* family, bits, is_cidr, address length, address in network byte order.
*
* Presence of is_cidr is largely for historical reasons, though it might
* allow some code-sharing on the client side. We send it correctly on
* output, but ignore the value on input.
*/
static inet *
network_recv(StringInfo buf, bool is_cidr)
{
inet *addr;
char *addrptr;
int bits;
int nb,
i;
/* make sure any unused bits in a CIDR value are zeroed */
addr = (inet *) palloc0(VARHDRSZ + sizeof(inet_struct));
ip_family(addr) = pq_getmsgbyte(buf);
if (ip_family(addr) != PGSQL_AF_INET &&
ip_family(addr) != PGSQL_AF_INET6)
ereport(ERROR,
(errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
/* translator: %s is inet or cidr */
errmsg("invalid address family in external \"%s\" value",
is_cidr ? "cidr" : "inet")));
bits = pq_getmsgbyte(buf);
if (bits < 0 || bits > ip_maxbits(addr))
ereport(ERROR,
(errcode(ERRCODE_INVALID_BINARY_REPRESENTATION), /* translator: %s is inet or cidr */
errmsg("invalid bits in external \"%s\" value",
is_cidr ? "cidr" : "inet")));
ip_bits(addr) = bits;
i = pq_getmsgbyte(buf); /* ignore is_cidr */
nb = pq_getmsgbyte(buf);
if (nb != ip_addrsize(addr))
ereport(ERROR,
(errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
/* translator: %s is inet or cidr */
errmsg("invalid length in external \"%s\" value",
is_cidr ? "cidr" : "inet")));
VARATT_SIZEP(addr) = VARHDRSZ +
((char *) ip_addr(addr) - (char *) VARDATA(addr)) +
ip_addrsize(addr);
addrptr = (char *) ip_addr(addr);
for (i = 0; i < nb; i++)
addrptr[i] = pq_getmsgbyte(buf);
/*
* Error check: CIDR values must not have any bits set beyond the masklen.
*/
if (is_cidr)
{
if (!addressOK(ip_addr(addr), bits, ip_family(addr)))
ereport(ERROR,
(errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
errmsg("invalid external \"cidr\" value"),
errdetail("Value has bits set to right of mask.")));
}
return addr;
}
Datum
inet_recv(PG_FUNCTION_ARGS)
{
StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
PG_RETURN_INET_P(network_recv(buf, false));
}
Datum
cidr_recv(PG_FUNCTION_ARGS)
{
StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
PG_RETURN_INET_P(network_recv(buf, true));
}
/*
* network_send - converts inet to binary format
*/
static bytea *
network_send(inet *addr, bool is_cidr)
{
StringInfoData buf;
char *addrptr;
int nb,
i;
pq_begintypsend(&buf);
pq_sendbyte(&buf, ip_family(addr));
pq_sendbyte(&buf, ip_bits(addr));
pq_sendbyte(&buf, is_cidr);
nb = ip_addrsize(addr);
if (nb < 0)
nb = 0; pq_sendbyte(&buf, nb);
addrptr = (char *) ip_addr(addr);
for (i = 0; i < nb; i++)
pq_sendbyte(&buf, addrptr[i]);
return pq_endtypsend(&buf);
}
Datum
inet_send(PG_FUNCTION_ARGS)
{
inet *addr = PG_GETARG_INET_P(0);
PG_RETURN_BYTEA_P(network_send(addr, false));
}
Datum
cidr_send(PG_FUNCTION_ARGS)
{
inet *addr = PG_GETARG_INET_P(0);
PG_RETURN_BYTEA_P(network_send(addr, true));
}
static inet *
text_network(text *src, bool is_cidr)
{
int len = VARSIZE(src) - VARHDRSZ;
char *str = palloc(len + 1);
memcpy(str, VARDATA(src), len);
str[len] = '\0';
return network_in(str, is_cidr);
}
Datum
text_inet(PG_FUNCTION_ARGS)
{
text *src = PG_GETARG_TEXT_P(0);
PG_RETURN_INET_P(text_network(src, false));
}
Datum
text_cidr(PG_FUNCTION_ARGS)
{
text *src = PG_GETARG_TEXT_P(0);
PG_RETURN_INET_P(text_network(src, true));
}
Datum
inet_to_cidr(PG_FUNCTION_ARGS)
{
inet *src = PG_GETARG_INET_P(0);
inet *dst;
int bits;
int byte;
int nbits;
int maxbytes;
bits = ip_bits(src);
/* safety check */
if ((bits < 0) || (bits > ip_maxbits(src)))
elog(ERROR, "invalid inet bit length: %d", bits);
/* clone the original data */ dst = (inet *) palloc(VARSIZE(src));
memcpy(dst, src, VARSIZE(src));
/* zero out any bits to the right of the netmask */
byte = bits / 8;
nbits = bits % 8;
/* clear the first byte, this might be a partial byte */
if (nbits != 0)
{
ip_addr(dst)[byte] &= ~(0xFF >> nbits);
byte++;
}
/* clear remaining bytes */
maxbytes = ip_addrsize(dst);
while (byte < maxbytes)
{
ip_addr(dst)[byte] = 0;
byte++;
}
PG_RETURN_INET_P(dst);
}
Datum
inet_set_masklen(PG_FUNCTION_ARGS)
{
inet *src = PG_GETARG_INET_P(0);
int bits = PG_GETARG_INT32(1);
inet *dst;
if (bits == -1)
bits = ip_maxbits(src);
if ((bits < 0) || (bits > ip_maxbits(src)))
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("invalid mask length: %d", bits)));
/* clone the original data */
dst = (inet *) palloc(VARSIZE(src));
memcpy(dst, src, VARSIZE(src));
ip_bits(dst) = bits;
PG_RETURN_INET_P(dst);
}
Datum
cidr_set_masklen(PG_FUNCTION_ARGS)
{
inet *src = PG_GETARG_INET_P(0);
int bits = PG_GETARG_INT32(1);
inet *dst;
int byte;
int nbits;
int maxbytes;
if (bits == -1)
bits = ip_maxbits(src);
if ((bits < 0) || (bits > ip_maxbits(src)))
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("invalid mask length: %d", bits)));
/* clone the original data */
dst = (inet *) palloc(VARSIZE(src));
memcpy(dst, src, VARSIZE(src));
ip_bits(dst) = bits;
/* zero out any bits to the right of the new netmask */
byte = bits / 8;
nbits = bits % 8;
/* clear the first byte, this might be a partial byte */
if (nbits != 0)
{
ip_addr(dst)[byte] &= ~(0xFF >> nbits);
byte++;
}
/* clear remaining bytes */
maxbytes = ip_addrsize(dst);
while (byte < maxbytes)
{
ip_addr(dst)[byte] = 0;
byte++;
}
PG_RETURN_INET_P(dst);
}
/*
* Basic comparison function for sorting and inet/cidr comparisons.
*
* Comparison is first on the common bits of the network part, then on
* the length of the network part, and then on the whole unmasked address.
* The effect is that the network part is the major sort key, and for
* equal network parts we sort on the host part. Note this is only sane
* for CIDR if address bits to the right of the mask are guaranteed zero;
* otherwise logically-equal CIDRs might compare different.
*/
static int32
network_cmp_internal(inet *a1, inet *a2)
{
if (ip_family(a1) == ip_family(a2))
{
int order;
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 bitncmp(ip_addr(a1), ip_addr(a2), ip_maxbits(a1));
}
return ip_family(a1) - ip_family(a2);
}
Datum
network_cmp(PG_FUNCTION_ARGS)
{
inet *a1 = PG_GETARG_INET_P(0);
inet *a2 = PG_GETARG_INET_P(1);
PG_RETURN_INT32(network_cmp_internal(a1, a2));
}
/*
* Boolean ordering tests.
*/
Datum
network_lt(PG_FUNCTION_ARGS)
{
inet *a1 = PG_GETARG_INET_P(0);
inet *a2 = PG_GETARG_INET_P(1);
PG_RETURN_BOOL(network_cmp_internal(a1, a2) < 0);
}
Datum
network_le(PG_FUNCTION_ARGS)
{
inet *a1 = PG_GETARG_INET_P(0);
inet *a2 = PG_GETARG_INET_P(1);
PG_RETURN_BOOL(network_cmp_internal(a1, a2) <= 0);
}
Datum
network_eq(PG_FUNCTION_ARGS)
{
inet *a1 = PG_GETARG_INET_P(0);
inet *a2 = PG_GETARG_INET_P(1);
PG_RETURN_BOOL(network_cmp_internal(a1, a2) == 0);
}
Datum
network_ge(PG_FUNCTION_ARGS)
{
inet *a1 = PG_GETARG_INET_P(0);
inet *a2 = PG_GETARG_INET_P(1);
PG_RETURN_BOOL(network_cmp_internal(a1, a2) >= 0);
}
Datum
network_gt(PG_FUNCTION_ARGS)
{
inet *a1 = PG_GETARG_INET_P(0);
inet *a2 = PG_GETARG_INET_P(1);
PG_RETURN_BOOL(network_cmp_internal(a1, a2) > 0);
}
Datum
network_ne(PG_FUNCTION_ARGS)
{
inet *a1 = PG_GETARG_INET_P(0);
inet *a2 = PG_GETARG_INET_P(1);
PG_RETURN_BOOL(network_cmp_internal(a1, a2) != 0);
}
/*
* Support function for hash indexes on inet/cidr.
*/
Datum
hashinet(PG_FUNCTION_ARGS)
{
inet *addr = PG_GETARG_INET_P(0);
int addrsize = ip_addrsize(addr);
/* XXX this assumes there are no pad bytes in the data structure */
return hash_any((unsigned char *) VARDATA(addr), addrsize + 2);
}
/*
* Boolean network-inclusion tests.
*/
Datum
network_sub(PG_FUNCTION_ARGS)
{
inet *a1 = PG_GETARG_INET_P(0);
inet *a2 = PG_GETARG_INET_P(1);
if (ip_family(a1) == ip_family(a2))
{
PG_RETURN_BOOL(ip_bits(a1) > ip_bits(a2)
&& bitncmp(ip_addr(a1), ip_addr(a2), ip_bits(a2)) == 0);
}
PG_RETURN_BOOL(false);
}
Datum
network_subeq(PG_FUNCTION_ARGS)
{
inet *a1 = PG_GETARG_INET_P(0);
inet *a2 = PG_GETARG_INET_P(1);
if (ip_family(a1) == ip_family(a2))
{
PG_RETURN_BOOL(ip_bits(a1) >= ip_bits(a2)
&& bitncmp(ip_addr(a1), ip_addr(a2), ip_bits(a2)) == 0);
}
PG_RETURN_BOOL(false);
}
Datum
network_sup(PG_FUNCTION_ARGS)
{
inet *a1 = PG_GETARG_INET_P(0);
inet *a2 = PG_GETARG_INET_P(1);
if (ip_family(a1) == ip_family(a2))
{
PG_RETURN_BOOL(ip_bits(a1) < ip_bits(a2)
&& bitncmp(ip_addr(a1), ip_addr(a2), ip_bits(a1)) == 0);
}
PG_RETURN_BOOL(false);
}
Datum
network_supeq(PG_FUNCTION_ARGS)
{
inet *a1 = PG_GETARG_INET_P(0);
inet *a2 = PG_GETARG_INET_P(1);
if (ip_family(a1) == ip_family(a2))
{
PG_RETURN_BOOL(ip_bits(a1) <= ip_bits(a2)
&& bitncmp(ip_addr(a1), ip_addr(a2), ip_bits(a1)) == 0);
}
PG_RETURN_BOOL(false);
}
/*
* Extract data from a network datatype.
*/
Datum
network_host(PG_FUNCTION_ARGS)
{
inet *ip = PG_GETARG_INET_P(0);
text *ret;
int len;
char *ptr;
char tmp[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
/* 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)
ereport(ERROR, (errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
errmsg("could not format inet value: %m")));
/* Suppress /n if present (shouldn't happen now) */
if ((ptr = strchr(tmp, '/')) != NULL)
*ptr = '\0';
/* Return string as a text datum */
len = strlen(tmp);
ret = (text *) palloc(len + VARHDRSZ);
VARATT_SIZEP(ret) = len + VARHDRSZ;
memcpy(VARDATA(ret), tmp, len);
PG_RETURN_TEXT_P(ret);
}
Datum
network_show(PG_FUNCTION_ARGS)
{
inet *ip = PG_GETARG_INET_P(0);
text *ret;
int len;
char tmp[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
if (inet_net_ntop(ip_family(ip), ip_addr(ip), ip_maxbits(ip),
tmp, sizeof(tmp)) == NULL)
ereport(ERROR,
(errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
errmsg("could not format inet value: %m")));
/* Add /n if not present (which it won't be) */
if (strchr(tmp, '/') == NULL)
{
len = strlen(tmp);
snprintf(tmp + len, sizeof(tmp) - len, "/%u", ip_bits(ip));
}
/* Return string as a text datum */
len = strlen(tmp);
ret = (text *) palloc(len + VARHDRSZ);
VARATT_SIZEP(ret) = len + VARHDRSZ;
memcpy(VARDATA(ret), tmp, len);
PG_RETURN_TEXT_P(ret);
}
Datum
inet_abbrev(PG_FUNCTION_ARGS)
{
inet *ip = PG_GETARG_INET_P(0);
text *ret;
char *dst;
int len;
char tmp[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
dst = inet_net_ntop(ip_family(ip), ip_addr(ip),
ip_bits(ip), tmp, sizeof(tmp));
if (dst == NULL)
ereport(ERROR,
(errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
errmsg("could not format inet value: %m")));
/* Return string as a text datum */
len = strlen(tmp);
ret = (text *) palloc(len + VARHDRSZ);
VARATT_SIZEP(ret) = len + VARHDRSZ;
memcpy(VARDATA(ret), tmp, len);
PG_RETURN_TEXT_P(ret);
}
Datumcidr_abbrev(PG_FUNCTION_ARGS)
{
inet *ip = PG_GETARG_INET_P(0);
text *ret;
char *dst;
int len;
char tmp[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
dst = inet_cidr_ntop(ip_family(ip), ip_addr(ip),
ip_bits(ip), tmp, sizeof(tmp));
if (dst == NULL)
ereport(ERROR,
(errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
errmsg("could not format cidr value: %m")));
/* Return string as a text datum */
len = strlen(tmp);
ret = (text *) palloc(len + VARHDRSZ);
VARATT_SIZEP(ret) = len + VARHDRSZ;
memcpy(VARDATA(ret), tmp, len);
PG_RETURN_TEXT_P(ret);
}
Datum
network_masklen(PG_FUNCTION_ARGS)
{
inet *ip = PG_GETARG_INET_P(0);
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) == PGSQL_AF_INET)
maxbytes = 4;
else
maxbytes = 16;
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;
}
b[byte] = a[byte] | mask;
}
ip_family(dst) = ip_family(ip);
ip_bits(dst) = ip_bits(ip);
VARATT_SIZEP(dst) = VARHDRSZ +
((char *) ip_addr(dst) - (char *) VARDATA(dst)) +
ip_addrsize(dst);
PG_RETURN_INET_P(dst);
}
Datum
network_network(PG_FUNCTION_ARGS)
{
inet *ip = PG_GETARG_INET_P(0);
inet *dst;
int byte;
int bits;
unsigned char mask;
unsigned char *a,
*b;
/* make sure any unused bits are zeroed */
dst = (inet *) palloc0(VARHDRSZ + sizeof(inet_struct));
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;
}
b[byte] = a[byte] & mask;
byte++;
}
ip_family(dst) = ip_family(ip);
ip_bits(dst) = ip_bits(ip); VARATT_SIZEP(dst) = VARHDRSZ +
((char *) ip_addr(dst) - (char *) VARDATA(dst)) +
ip_addrsize(dst);
PG_RETURN_INET_P(dst);
}
Datum
network_netmask(PG_FUNCTION_ARGS)
{
inet *ip = PG_GETARG_INET_P(0);
inet *dst;
int byte;
int bits;
unsigned char mask;
unsigned char *b;
/* make sure any unused bits are zeroed */
dst = (inet *) palloc0(VARHDRSZ + sizeof(inet_struct));
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;
}
b[byte] = mask;
byte++;
}
ip_family(dst) = ip_family(ip);
ip_bits(dst) = ip_maxbits(ip);
VARATT_SIZEP(dst) = VARHDRSZ +
((char *) ip_addr(dst) - (char *) VARDATA(dst)) +
ip_addrsize(dst);
PG_RETURN_INET_P(dst);
}
Datum
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) == PGSQL_AF_INET)
maxbytes = 4;
else
maxbytes = 16;
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;
}
b[byte] = mask;
byte--;
}
ip_family(dst) = ip_family(ip);
ip_bits(dst) = ip_maxbits(ip);
VARATT_SIZEP(dst) = VARHDRSZ +
((char *) ip_addr(dst) - (char *) VARDATA(dst)) +
ip_addrsize(dst);
PG_RETURN_INET_P(dst);
}
/*
* Convert a value of a network datatype to an approximate scalar value.
* This is used for estimating selectivities of inequality operators
* involving network types.
*/
double
convert_network_to_scalar(Datum value, Oid typid)
{
switch (typid)
{
case INETOID:
case CIDROID:
{
inet *ip = DatumGetInetP(value);
int len;
double res;
int i;
/*
* Note that we don't use the full address for IPv6.
*/
if (ip_family(ip) == PGSQL_AF_INET)
len = 4;
else
len = 5;
res = ip_family(ip);
for (i = 0; i < len; i++)
{
res *= 256;
res += ip_addr(ip)[i];
}
return res;
break;
}
case MACADDROID:
{
macaddr *mac = DatumGetMacaddrP(value);
double res;
res = (mac->a << 16) | (mac->b << 8) | (mac->c);
res *= 256 * 256 * 256;
res += (mac->d << 16) | (mac->e << 8) | (mac->f);
return res;
}
}
/*
* Can't get here unless someone tries to use scalarltsel/scalargtsel on
* an operator with one network and one non-network operand.
*/
elog(ERROR, "unsupported type: %u", typid);
return 0;
}
/*
* 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
bitncmp(void *l, void *r, int n)
{
u_int lb,
rb;
int x,
b;
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 (IS_HIGHBIT_SET(lb) != IS_HIGHBIT_SET(rb))
{
if (IS_HIGHBIT_SET(lb))
return 1;
return -1;
}
lb <<= 1;
rb <<= 1;
}
return 0;
}
static bool
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;
}
Assert(bits <= maxbits);
if (bits == maxbits)
return true;
byte = bits / 8;
nbits = bits % 8;
mask = 0xff;
if (bits != 0)
mask >>= nbits;
while (byte < maxbytes)
{
if ((a[byte] & mask) != 0)
return false;
mask = 0xff;
byte++;
}
return true;
}
/*
* These functions are used by planner to generate indexscan limits
* for clauses a << b and a <<= b
*/
/* return the minimal value for an IP on a given network */
Datum
network_scan_first(Datum in)
{
return DirectFunctionCall1(network_network, in);
}
/*
* return "last" IP on a given network. It's the broadcast address,
* 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
*
* 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(-1));
}
/*
* IP address that the client is connecting from (NULL if Unix socket)
*/
Datum
inet_client_addr(PG_FUNCTION_ARGS)
{
Port *port = MyProcPort;
char remote_host[NI_MAXHOST];
int ret;
if (port == NULL)
PG_RETURN_NULL();
switch (port->raddr.addr.ss_family)
{
case AF_INET:
#ifdef HAVE_IPV6
case AF_INET6:
#endif
break;
default:
PG_RETURN_NULL();
}
remote_host[0] = '\0';
ret = pg_getnameinfo_all(&port->raddr.addr, port->raddr.salen,
remote_host, sizeof(remote_host),
NULL, 0,
NI_NUMERICHOST | NI_NUMERICSERV);
if (ret)
PG_RETURN_NULL();
PG_RETURN_INET_P(network_in(remote_host, false));
}
/*
* port that the client is connecting from (NULL if Unix socket)
*/
Datum
inet_client_port(PG_FUNCTION_ARGS)
{
Port *port = MyProcPort;
char remote_port[NI_MAXSERV];
int ret;
if (port == NULL)
PG_RETURN_NULL();
switch (port->raddr.addr.ss_family)
{
case AF_INET:
#ifdef HAVE_IPV6
case AF_INET6:
#endif
break;
default:
PG_RETURN_NULL();
}
remote_port[0] = '\0';
ret = pg_getnameinfo_all(&port->raddr.addr, port->raddr.salen,
NULL, 0,
remote_port, sizeof(remote_port),
NI_NUMERICHOST | NI_NUMERICSERV);
if (ret)
PG_RETURN_NULL();
PG_RETURN_DATUM(DirectFunctionCall1(int4in, CStringGetDatum(remote_port)));
}
/*
* IP address that the server accepted the connection on (NULL if Unix socket)
*/
Datum
inet_server_addr(PG_FUNCTION_ARGS)
{
Port *port = MyProcPort;
char local_host[NI_MAXHOST];
int ret;
if (port == NULL)
PG_RETURN_NULL();
switch (port->laddr.addr.ss_family)
{
case AF_INET:
#ifdef HAVE_IPV6
case AF_INET6:
#endif
break;
default:
PG_RETURN_NULL();
}
local_host[0] = '\0';
ret = pg_getnameinfo_all(&port->laddr.addr, port->laddr.salen,
local_host, sizeof(local_host),
NULL, 0,
NI_NUMERICHOST | NI_NUMERICSERV);
if (ret)
PG_RETURN_NULL();
PG_RETURN_INET_P(network_in(local_host, false));
}
/*
* port that the server accepted the connection on (NULL if Unix socket)
*/
Datum
inet_server_port(PG_FUNCTION_ARGS)
{
Port *port = MyProcPort;
char local_port[NI_MAXSERV];
int ret;
if (port == NULL)
PG_RETURN_NULL();
switch (port->laddr.addr.ss_family)
{
case AF_INET:
#ifdef HAVE_IPV6
case AF_INET6:
#endif
break;
default:
PG_RETURN_NULL();
}
local_port[0] = '\0';
ret = pg_getnameinfo_all(&port->laddr.addr, port->laddr.salen,
NULL, 0,
local_port, sizeof(local_port),
NI_NUMERICHOST | NI_NUMERICSERV);
if (ret)
PG_RETURN_NULL();
PG_RETURN_DATUM(DirectFunctionCall1(int4in, CStringGetDatum(local_port)));
}
Datum
inetnot(PG_FUNCTION_ARGS)
{
inet *ip = PG_GETARG_INET_P(0);
inet *dst;
dst = (inet *) palloc0(VARHDRSZ + sizeof(inet_struct));
{
int nb = ip_addrsize(ip);
unsigned char *pip = ip_addr(ip);
unsigned char *pdst = ip_addr(dst);
while (nb-- > 0)
pdst[nb] = ~pip[nb];
}
ip_bits(dst) = ip_bits(ip);
ip_family(dst) = ip_family(ip);
VARATT_SIZEP(dst) = VARHDRSZ +
((char *) ip_addr(dst) - (char *) VARDATA(dst)) +
ip_addrsize(dst);
PG_RETURN_INET_P(dst);
}
Datum
inetand(PG_FUNCTION_ARGS)
{
inet *ip = PG_GETARG_INET_P(0);
inet *ip2 = PG_GETARG_INET_P(1);
inet *dst;
dst = (inet *) palloc0(VARHDRSZ + sizeof(inet_struct));
if (ip_family(ip) != ip_family(ip2))
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("cannot AND inet values of different sizes")));
else
{
int nb = ip_addrsize(ip);
unsigned char *pip = ip_addr(ip);
unsigned char *pip2 = ip_addr(ip2);
unsigned char *pdst = ip_addr(dst);
while (nb-- > 0)
pdst[nb] = pip[nb] & pip2[nb];
}
ip_bits(dst) = Max(ip_bits(ip), ip_bits(ip2));
ip_family(dst) = ip_family(ip);
VARATT_SIZEP(dst) = VARHDRSZ +
((char *) ip_addr(dst) - (char *) VARDATA(dst)) +
ip_addrsize(dst);
PG_RETURN_INET_P(dst);
}
Datum
inetor(PG_FUNCTION_ARGS)
{
inet *ip = PG_GETARG_INET_P(0);
inet *ip2 = PG_GETARG_INET_P(1);
inet *dst;
dst = (inet *) palloc0(VARHDRSZ + sizeof(inet_struct));
if (ip_family(ip) != ip_family(ip2))
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("cannot OR inet values of different sizes")));
else {
int nb = ip_addrsize(ip);
unsigned char *pip = ip_addr(ip);
unsigned char *pip2 = ip_addr(ip2);
unsigned char *pdst = ip_addr(dst);
while (nb-- > 0)
pdst[nb] = pip[nb] | pip2[nb];
}
ip_bits(dst) = Max(ip_bits(ip), ip_bits(ip2));
ip_family(dst) = ip_family(ip);
VARATT_SIZEP(dst) = VARHDRSZ +
((char *) ip_addr(dst) - (char *) VARDATA(dst)) +
ip_addrsize(dst);
PG_RETURN_INET_P(dst);
}
static inet *
internal_inetpl(inet *ip, int64 addend)
{
inet *dst;
dst = (inet *) palloc0(VARHDRSZ + sizeof(inet_struct));
{
int nb = ip_addrsize(ip);
unsigned char *pip = ip_addr(ip);
unsigned char *pdst = ip_addr(dst);
int carry = 0;
while (nb-- > 0)
{
carry = pip[nb] + (int) (addend & 0xFF) + carry;
pdst[nb] = (unsigned char) (carry & 0xFF);
carry >>= 8;
/*
* We have to be careful about right-shifting addend because
* right-shift isn't portable for negative values, while
* simply dividing by 256 doesn't work (the standard rounding
* is in the wrong direction, besides which there may be machines
* out there that round the wrong way). So, explicitly clear
* the low-order byte to remove any doubt about the correct
* result of the division, and then divide rather than shift.
*/
addend &= ~((int64) 0xFF);
addend /= 0x100;
}
/*
* At this point we should have addend and carry both zero if
* original addend was >= 0, or addend -1 and carry 1 if original
* addend was < 0. Anything else means overflow.
*/
if (!((addend == 0 && carry == 0) ||
(addend == -1 && carry == 1)))
ereport(ERROR,
(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("result out of range")));
}
ip_bits(dst) = ip_bits(ip);
ip_family(dst) = ip_family(ip);
VARATT_SIZEP(dst) = VARHDRSZ +
((char *) ip_addr(dst) - (char *) VARDATA(dst)) +
ip_addrsize(dst);
return dst;
}
Datum
inetpl(PG_FUNCTION_ARGS)
{
inet *ip = PG_GETARG_INET_P(0);
int64 addend = PG_GETARG_INT64(1);
PG_RETURN_INET_P(internal_inetpl(ip, addend));
}
Datum
inetmi_int8(PG_FUNCTION_ARGS)
{
inet *ip = PG_GETARG_INET_P(0);
int64 addend = PG_GETARG_INT64(1);
PG_RETURN_INET_P(internal_inetpl(ip, -addend));
}
Datum
inetmi(PG_FUNCTION_ARGS)
{
inet *ip = PG_GETARG_INET_P(0);
inet *ip2 = PG_GETARG_INET_P(1);
int64 res = 0;
if (ip_family(ip) != ip_family(ip2))
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("cannot subtract inet values of different sizes")));
else
{
/*
* We form the difference using the traditional complement,
* increment, and add rule, with the increment part being handled
* by starting the carry off at 1. If you don't think integer
* arithmetic is done in two's complement, too bad.
*/
int nb = ip_addrsize(ip);
int byte = 0;
unsigned char *pip = ip_addr(ip);
unsigned char *pip2 = ip_addr(ip2);
int carry = 1;
while (nb-- > 0)
{
int lobyte;
carry = pip[nb] + (~pip2[nb] & 0xFF) + carry;
lobyte = carry & 0xFF;
if (byte < sizeof(int64))
{
res |= ((int64) lobyte) << (byte * 8);
}
else
{
/*
* Input wider than int64: check for overflow. All bytes
* to the left of what will fit should be 0 or 0xFF,
* depending on sign of the now-complete result.
*/
if ((res < 0) ? (lobyte != 0xFF) : (lobyte != 0))
ereport(ERROR,
(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("result out of range")));
}
carry >>= 8; byte++;
}
/*
* If input is narrower than int64, overflow is not possible, but
* we have to do proper sign extension.
*/
if (carry == 0 && byte < sizeof(int64))
res |= ((int64) -1) << (byte * 8);
}
PG_RETURN_INT64(res);
}