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openGauss-server/src/common/backend/utils/adt/network.cpp

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/*
* PostgreSQL type definitions for the INET and CIDR types.
*
* src/backend/utils/adt/network.c
*
* Jon Postel RIP 16 Oct 1998
*/
#include "postgres.h"
#include "knl/knl_variable.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 int32 network_cmp_internal(inet* a1, inet* a2);
static int bitncmp(const void* l, const 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. We use VARDATA_ANY so that we can process short-header
* varlena values without detoasting them. This requires a trick:
* VARDATA_ANY assumes the varlena header is already filled in, which is
* not the case when constructing a new value (until SET_INET_VARSIZE is
* called, which we typically can't do till the end). Therefore, we
* always initialize the newly-allocated value to zeroes (using palloc0).
* A zero length word will look like the not-1-byte case to VARDATA_ANY,
* and so we correctly construct an uncompressed value.
*
* Note that ip_maxbits() and SET_INET_VARSIZE() require
* the family field to be set correctly.
*/
#define ip_family(inetptr) (((inet_struct*)VARDATA_ANY(inetptr))->family)
#define ip_bits(inetptr) (((inet_struct*)VARDATA_ANY(inetptr))->bits)
#define ip_addr(inetptr) (((inet_struct*)VARDATA_ANY(inetptr))->ipaddr)
#define ip_maxbits(inetptr) ((ip_family(inetptr) == PGSQL_AF_INET) ? 32 : 128)
#define SET_INET_VARSIZE(dst) SET_VARSIZE(dst, VARHDRSZ + offsetof(inet_struct, ipaddr) + ip_addrsize(dst))
/*
* Return the number of bytes of address 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 = NULL;
dst = (inet*)palloc0(sizeof(inet));
/*
* 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.")));
}
ip_bits(dst) = bits;
SET_INET_VARSIZE(dst);
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 = NULL;
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);
errno_t ss_rc = snprintf_s(tmp + len, sizeof(tmp) - len, sizeof(tmp) - len - 1, "/%u", ip_bits(src));
securec_check_ss(ss_rc, "\0", "\0");
}
return pstrdup(tmp);
}
Datum inet_out(PG_FUNCTION_ARGS)
{
inet* src = PG_GETARG_INET_PP(0);
char* result = network_out(src, false);
/* free memory if allocated by the toaster */
PG_FREE_IF_COPY(src, 0);
PG_RETURN_CSTRING(result);
}
Datum cidr_out(PG_FUNCTION_ARGS)
{
inet* src = PG_GETARG_INET_PP(0);
char* result = network_out(src, true);
/* free memory if allocated by the toaster */
PG_FREE_IF_COPY(src, 0);
PG_RETURN_CSTRING(result);
}
/*
* 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 = NULL;
char* addrptr = NULL;
int bits;
int nb, i;
/* make sure any unused bits in a CIDR value are zeroed */
addr = (inet*)palloc0(sizeof(inet));
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")));
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.")));
}
SET_INET_VARSIZE(addr);
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 = NULL;
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_PP(0);
PG_RETURN_BYTEA_P(network_send(addr, false));
}
Datum cidr_send(PG_FUNCTION_ARGS)
{
inet* addr = PG_GETARG_INET_PP(0);
PG_RETURN_BYTEA_P(network_send(addr, true));
}
Datum inet_to_cidr(PG_FUNCTION_ARGS)
{
inet* src = PG_GETARG_INET_PP(0);
inet* dst = NULL;
int bits;
int byte;
int nbits;
int maxbytes;
bits = ip_bits(src);
/* safety check */
if ((bits < 0) || (bits >= ip_maxbits(src)))
ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), errmsg("invalid inet bit length: %d", bits)));
/* clone the original data */
dst = (inet*)palloc(VARSIZE_ANY(src));
errno_t ss_rc = memcpy_s(dst, VARSIZE_ANY(src), src, VARSIZE_ANY(src));
securec_check(ss_rc, "\0", "\0");
/* 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] &= ~(unsigned int)(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_PP(0);
int bits = PG_GETARG_INT32(1);
inet* dst = NULL;
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_ANY(src));
errno_t ss_rc = memcpy_s(dst, VARSIZE_ANY(src), src, VARSIZE_ANY(src));
securec_check(ss_rc, "\0", "\0");
ip_bits(dst) = bits;
PG_RETURN_INET_P(dst);
}
Datum cidr_set_masklen(PG_FUNCTION_ARGS)
{
inet* src = PG_GETARG_INET_PP(0);
int bits = PG_GETARG_INT32(1);
inet* dst = NULL;
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_ANY(src));
errno_t ss_rc = memcpy_s(dst, VARSIZE_ANY(src), src, VARSIZE_ANY(src));
securec_check(ss_rc, "\0", "\0");
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] &= ~(unsigned int)(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_PP(0);
inet* a2 = PG_GETARG_INET_PP(1);
PG_RETURN_INT32(network_cmp_internal(a1, a2));
}
/*
* Boolean ordering tests.
*/
Datum network_lt(PG_FUNCTION_ARGS)
{
inet* a1 = PG_GETARG_INET_PP(0);
inet* a2 = PG_GETARG_INET_PP(1);
PG_RETURN_BOOL(network_cmp_internal(a1, a2) < 0);
}
Datum network_le(PG_FUNCTION_ARGS)
{
inet* a1 = PG_GETARG_INET_PP(0);
inet* a2 = PG_GETARG_INET_PP(1);
PG_RETURN_BOOL(network_cmp_internal(a1, a2) <= 0);
}
Datum network_eq(PG_FUNCTION_ARGS)
{
inet* a1 = PG_GETARG_INET_PP(0);
inet* a2 = PG_GETARG_INET_PP(1);
PG_RETURN_BOOL(network_cmp_internal(a1, a2) == 0);
}
Datum network_ge(PG_FUNCTION_ARGS)
{
inet* a1 = PG_GETARG_INET_PP(0);
inet* a2 = PG_GETARG_INET_PP(1);
PG_RETURN_BOOL(network_cmp_internal(a1, a2) >= 0);
}
Datum network_gt(PG_FUNCTION_ARGS)
{
inet* a1 = PG_GETARG_INET_PP(0);
inet* a2 = PG_GETARG_INET_PP(1);
PG_RETURN_BOOL(network_cmp_internal(a1, a2) > 0);
}
Datum network_ne(PG_FUNCTION_ARGS)
{
inet* a1 = PG_GETARG_INET_PP(0);
inet* a2 = PG_GETARG_INET_PP(1);
PG_RETURN_BOOL(network_cmp_internal(a1, a2) != 0);
}
/*
* MIN/MAX support functions.
*/
Datum network_smaller(PG_FUNCTION_ARGS)
{
inet *a1 = PG_GETARG_INET_PP(0);
inet *a2 = PG_GETARG_INET_PP(1);
if (network_cmp_internal(a1, a2) < 0)
PG_RETURN_INET_P(a1);
else
PG_RETURN_INET_P(a2);
}
Datum network_larger(PG_FUNCTION_ARGS)
{
inet *a1 = PG_GETARG_INET_PP(0);
inet *a2 = PG_GETARG_INET_PP(1);
if (network_cmp_internal(a1, a2) > 0)
PG_RETURN_INET_P(a1);
else
PG_RETURN_INET_P(a2);
}
/*
* Support function for hash indexes on inet/cidr.
*/
Datum hashinet(PG_FUNCTION_ARGS)
{
inet* addr = PG_GETARG_INET_PP(0);
int addrsize = ip_addrsize(addr);
/* XXX this assumes there are no pad bytes in the data structure */
Datum result = hash_any((unsigned char*)VARDATA_ANY(addr), addrsize + 2);
/* Avoid leaking memory for toasted inputs */
PG_FREE_IF_COPY(addr, 0);
return result;
}
/*
* Boolean network-inclusion tests.
*/
Datum network_sub(PG_FUNCTION_ARGS)
{
inet* a1 = PG_GETARG_INET_PP(0);
inet* a2 = PG_GETARG_INET_PP(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_PP(0);
inet* a2 = PG_GETARG_INET_PP(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_PP(0);
inet* a2 = PG_GETARG_INET_PP(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_PP(0);
inet* a2 = PG_GETARG_INET_PP(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_PP(0);
char* ptr = NULL;
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';
PG_RETURN_TEXT_P(cstring_to_text(tmp));
}
/*
* network_show implements the inet and cidr casts to text. This is not
* quite the same behavior as network_out, hence we can't drop it in favor
* of CoerceViaIO.
*/
Datum network_show(PG_FUNCTION_ARGS)
{
inet* ip = PG_GETARG_INET_PP(0);
int len;
char tmp[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
errno_t ss_rc;
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);
ss_rc = snprintf_s(tmp + len, sizeof(tmp) - len, sizeof(tmp) - len - 1, "/%u", ip_bits(ip));
securec_check_ss(ss_rc, "\0", "\0");
}
PG_RETURN_TEXT_P(cstring_to_text(tmp));
}
Datum inet_abbrev(PG_FUNCTION_ARGS)
{
inet* ip = PG_GETARG_INET_PP(0);
char* dst = NULL;
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")));
PG_RETURN_TEXT_P(cstring_to_text(tmp));
}
Datum cidr_abbrev(PG_FUNCTION_ARGS)
{
inet* ip = PG_GETARG_INET_PP(0);
char* dst = NULL;
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")));
PG_RETURN_TEXT_P(cstring_to_text(tmp));
}
Datum network_masklen(PG_FUNCTION_ARGS)
{
inet* ip = PG_GETARG_INET_PP(0);
PG_RETURN_INT32(ip_bits(ip));
}
Datum network_family(PG_FUNCTION_ARGS)
{
inet* ip = PG_GETARG_INET_PP(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_PP(0);
inet* dst = NULL;
int byte;
int bits;
int maxbytes;
unsigned char mask;
unsigned char *a = NULL, *b = NULL;
/* make sure any unused bits are zeroed */
dst = (inet*)palloc0(sizeof(inet));
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);
SET_INET_VARSIZE(dst);
PG_RETURN_INET_P(dst);
}
Datum network_network(PG_FUNCTION_ARGS)
{
inet* ip = PG_GETARG_INET_PP(0);
inet* dst = NULL;
int byte;
int bits;
unsigned char mask;
unsigned char *a, *b;
/* make sure any unused bits are zeroed */
dst = (inet*)palloc0(sizeof(inet));
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 << (unsigned int)(8 - bits);
bits = 0;
}
b[byte] = a[byte] & mask;
byte++;
}
ip_family(dst) = ip_family(ip);
ip_bits(dst) = ip_bits(ip);
SET_INET_VARSIZE(dst);
PG_RETURN_INET_P(dst);
}
Datum network_netmask(PG_FUNCTION_ARGS)
{
inet* ip = PG_GETARG_INET_PP(0);
inet* dst = NULL;
int byte;
int bits;
unsigned char mask;
unsigned char* b = NULL;
/* make sure any unused bits are zeroed */
dst = (inet*)palloc0(sizeof(inet));
bits = ip_bits(ip);
b = ip_addr(dst);
byte = 0;
while (bits) {
if (bits >= 8) {
mask = 0xff;
bits -= 8;
} else {
mask = 0xff << (unsigned int)(8 - bits);
bits = 0;
}
b[byte] = mask;
byte++;
}
ip_family(dst) = ip_family(ip);
ip_bits(dst) = ip_maxbits(ip);
SET_INET_VARSIZE(dst);
PG_RETURN_INET_P(dst);
}
Datum network_hostmask(PG_FUNCTION_ARGS)
{
inet* ip = PG_GETARG_INET_PP(0);
inet* dst = NULL;
int byte;
int bits;
int maxbytes;
unsigned char mask;
unsigned char* b = NULL;
/* make sure any unused bits are zeroed */
dst = (inet*)palloc0(sizeof(inet));
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;
}
if (unlikely(byte < 0)) {
ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), errmsg("could not format inet value")));
}
b[byte] = mask;
byte--;
}
ip_family(dst) = ip_family(ip);
ip_bits(dst) = ip_maxbits(ip);
SET_INET_VARSIZE(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 = DatumGetInetPP(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;
}
default:
break;
}
/*
* Can't get here unless someone tries to use scalarltsel/scalargtsel on
* an operator with one network and one non-network operand.
*/
ereport(ERROR, (errcode(ERRCODE_FEATURE_NOT_SUPPORTED), errmsg("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.
*/
static int bitncmp(const void* l, const void* r, int n)
{
u_int lb, rb;
int x, b;
b = n / 8;
x = memcmp(l, r, b);
if (x || (n % 8) == 0)
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 = u_sess->proc_cxt.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();
break;
}
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 != 0)
PG_RETURN_NULL();
clean_ipv6_addr(port->raddr.addr.ss_family, remote_host);
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 = u_sess->proc_cxt.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();
break;
}
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 != 0)
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 = u_sess->proc_cxt.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();
break;
}
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 != 0)
PG_RETURN_NULL();
clean_ipv6_addr(port->laddr.addr.ss_family, local_host);
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 = u_sess->proc_cxt.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();
break;
}
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 != 0)
PG_RETURN_NULL();
PG_RETURN_DATUM(DirectFunctionCall1(int4in, CStringGetDatum(local_port)));
}
Datum inetnot(PG_FUNCTION_ARGS)
{
inet* ip = PG_GETARG_INET_PP(0);
inet* dst = NULL;
dst = (inet*)palloc0(sizeof(inet));
{
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);
SET_INET_VARSIZE(dst);
PG_RETURN_INET_P(dst);
}
Datum inetand(PG_FUNCTION_ARGS)
{
inet* ip = PG_GETARG_INET_PP(0);
inet* ip2 = PG_GETARG_INET_PP(1);
inet* dst = NULL;
dst = (inet*)palloc0(sizeof(inet));
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);
SET_INET_VARSIZE(dst);
PG_RETURN_INET_P(dst);
}
Datum inetor(PG_FUNCTION_ARGS)
{
inet* ip = PG_GETARG_INET_PP(0);
inet* ip2 = PG_GETARG_INET_PP(1);
inet* dst = NULL;
dst = (inet*)palloc0(sizeof(inet));
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);
SET_INET_VARSIZE(dst);
PG_RETURN_INET_P(dst);
}
static inet* internal_inetpl(inet* ip, int64 addend)
{
inet* dst = NULL;
dst = (inet*)palloc0(sizeof(inet));
{
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 is out of range")));
}
ip_bits(dst) = ip_bits(ip);
ip_family(dst) = ip_family(ip);
SET_INET_VARSIZE(dst);
return dst;
}
Datum inetpl(PG_FUNCTION_ARGS)
{
inet* ip = PG_GETARG_INET_PP(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_PP(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_PP(0);
inet* ip2 = PG_GETARG_INET_PP(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 ((unsigned int)(byte) < sizeof(int64)) {
res |= ((int64)lobyte) << (unsigned int)(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 is 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 && (unsigned int)(byte) < sizeof(int64))
res |= ((int64)-1) << (unsigned int)(byte * 8);
}
PG_RETURN_INT64(res);
}
/*
* clean_ipv6_addr --- remove any '%zone' part from an IPv6 address string
*
* XXX This should go away someday!
*
* This is a kluge needed because we don't yet support zones in stored inet
* values. Since the result of getnameinfo() might include a zone spec,
* call this to remove it anywhere we want to feed getnameinfo's output to
* network_in. Beats failing entirely.
*
* An alternative approach would be to let network_in ignore %-parts for
* itself, but that would mean we'd silently drop zone specs in user input,
* which seems not such a good idea.
*/
void clean_ipv6_addr(int addr_family, char* addr)
{
#ifdef HAVE_IPV6
if (addr_family == AF_INET6) {
char* pct = strchr(addr, '%');
if (pct != NULL)
*pct = '\0';
}
#endif
}
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