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openldap/servers/slapd/limits.c
Quanah Gibson-Mount 1df85d3427 Happy New Year!
2017-01-03 12:36:47 -08:00

1356 lines
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/* limits.c - routines to handle regex-based size and time limits */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2017 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/ctype.h>
#include <ac/regex.h>
#include <ac/string.h>
#include "slap.h"
#include "lutil.h"
/* define to get an error if requesting limit higher than hard */
#undef ABOVE_HARD_LIMIT_IS_ERROR
static const struct berval lmpats[] = {
BER_BVC( "base" ),
BER_BVC( "base" ),
BER_BVC( "onelevel" ),
BER_BVC( "subtree" ),
BER_BVC( "children" ),
BER_BVC( "regex" ),
BER_BVC( "anonymous" ),
BER_BVC( "users" ),
BER_BVC( "*" )
};
#ifdef LDAP_DEBUG
static const char *const dn_source[2] = { "DN", "DN.THIS" };
static const char *const lmpats_out[] = {
"UNDEFINED",
"EXACT",
"ONELEVEL",
"SUBTREE",
"CHILDREN",
"REGEX",
"ANONYMOUS",
"USERS",
"ANY"
};
static const char *
limits2str( unsigned i )
{
return i < (sizeof( lmpats_out ) / sizeof( lmpats_out[0] ))
? lmpats_out[i] : "UNKNOWN";
}
#endif /* LDAP_DEBUG */
static int
limits_get(
Operation *op,
struct slap_limits_set **limit
)
{
static struct berval empty_dn = BER_BVC( "" );
struct slap_limits **lm;
struct berval *ndns[2];
assert( op != NULL );
assert( limit != NULL );
ndns[0] = &op->o_ndn;
ndns[1] = &op->o_req_ndn;
Debug( LDAP_DEBUG_TRACE, "==> limits_get: %s self=\"%s\" this=\"%s\"\n",
op->o_log_prefix,
BER_BVISNULL( ndns[0] ) ? "[anonymous]" : ndns[0]->bv_val,
BER_BVISNULL( ndns[1] ) ? "" : ndns[1]->bv_val );
/*
* default values
*/
*limit = &op->o_bd->be_def_limit;
if ( op->o_bd->be_limits == NULL ) {
return( 0 );
}
for ( lm = op->o_bd->be_limits; lm[0] != NULL; lm++ ) {
unsigned style = lm[0]->lm_flags & SLAP_LIMITS_MASK;
unsigned type = lm[0]->lm_flags & SLAP_LIMITS_TYPE_MASK;
unsigned isthis = type == SLAP_LIMITS_TYPE_THIS;
struct berval *ndn = ndns[isthis];
if ( style == SLAP_LIMITS_ANY )
goto found_any;
if ( BER_BVISEMPTY( ndn ) ) {
if ( style == SLAP_LIMITS_ANONYMOUS )
goto found_nodn;
if ( !isthis )
continue;
ndn = &empty_dn;
}
switch ( style ) {
case SLAP_LIMITS_EXACT:
if ( type == SLAP_LIMITS_TYPE_GROUP ) {
int rc = backend_group( op, NULL,
&lm[0]->lm_pat, ndn,
lm[0]->lm_group_oc,
lm[0]->lm_group_ad );
if ( rc == 0 ) {
goto found_group;
}
} else {
if ( dn_match( &lm[0]->lm_pat, ndn ) ) {
goto found_dn;
}
}
break;
case SLAP_LIMITS_ONE:
case SLAP_LIMITS_SUBTREE:
case SLAP_LIMITS_CHILDREN: {
ber_len_t d;
/* ndn shorter than lm_pat */
if ( ndn->bv_len < lm[0]->lm_pat.bv_len ) {
break;
}
d = ndn->bv_len - lm[0]->lm_pat.bv_len;
if ( d == 0 ) {
/* allow exact match for SUBTREE only */
if ( style != SLAP_LIMITS_SUBTREE ) {
break;
}
} else {
/* check for unescaped rdn separator */
if ( !DN_SEPARATOR( ndn->bv_val[d - 1] ) ) {
break;
}
}
/* check that ndn ends with lm_pat */
if ( strcmp( lm[0]->lm_pat.bv_val, &ndn->bv_val[d] ) != 0 ) {
break;
}
/* in case of ONE, require exactly one rdn below lm_pat */
if ( style == SLAP_LIMITS_ONE ) {
if ( dn_rdnlen( NULL, ndn ) != d - 1 ) {
break;
}
}
goto found_dn;
}
case SLAP_LIMITS_REGEX:
if ( regexec( &lm[0]->lm_regex, ndn->bv_val, 0, NULL, 0 ) == 0 ) {
goto found_dn;
}
break;
case SLAP_LIMITS_ANONYMOUS:
break;
case SLAP_LIMITS_USERS:
found_nodn:
Debug( LDAP_DEBUG_TRACE, "<== limits_get: type=%s match=%s\n",
dn_source[isthis], limits2str( style ), 0 );
found_any:
*limit = &lm[0]->lm_limits;
return( 0 );
found_dn:
Debug( LDAP_DEBUG_TRACE,
"<== limits_get: type=%s match=%s dn=\"%s\"\n",
dn_source[isthis], limits2str( style ), lm[0]->lm_pat.bv_val );
*limit = &lm[0]->lm_limits;
return( 0 );
found_group:
Debug( LDAP_DEBUG_TRACE, "<== limits_get: type=GROUP match=EXACT "
"dn=\"%s\" oc=\"%s\" ad=\"%s\"\n",
lm[0]->lm_pat.bv_val,
lm[0]->lm_group_oc->soc_cname.bv_val,
lm[0]->lm_group_ad->ad_cname.bv_val );
*limit = &lm[0]->lm_limits;
return( 0 );
default:
assert( 0 ); /* unreachable */
return( -1 );
}
}
return( 0 );
}
static int
limits_add(
Backend *be,
unsigned flags,
const char *pattern,
ObjectClass *group_oc,
AttributeDescription *group_ad,
struct slap_limits_set *limit
)
{
int i;
struct slap_limits *lm;
unsigned type, style;
assert( be != NULL );
assert( limit != NULL );
type = flags & SLAP_LIMITS_TYPE_MASK;
style = flags & SLAP_LIMITS_MASK;
switch ( style ) {
case SLAP_LIMITS_ANONYMOUS:
case SLAP_LIMITS_USERS:
case SLAP_LIMITS_ANY:
/* For these styles, type == 0 (SLAP_LIMITS_TYPE_SELF). */
for ( i = 0; be->be_limits && be->be_limits[ i ]; i++ ) {
if ( be->be_limits[ i ]->lm_flags == style ) {
return( -1 );
}
}
break;
}
lm = ( struct slap_limits * )ch_calloc( sizeof( struct slap_limits ), 1 );
switch ( style ) {
case SLAP_LIMITS_UNDEFINED:
style = SLAP_LIMITS_EXACT;
/* continue to next cases */
case SLAP_LIMITS_EXACT:
case SLAP_LIMITS_ONE:
case SLAP_LIMITS_SUBTREE:
case SLAP_LIMITS_CHILDREN:
{
int rc;
struct berval bv;
ber_str2bv( pattern, 0, 0, &bv );
rc = dnNormalize( 0, NULL, NULL, &bv, &lm->lm_pat, NULL );
if ( rc != LDAP_SUCCESS ) {
ch_free( lm );
return( -1 );
}
}
break;
case SLAP_LIMITS_REGEX:
ber_str2bv( pattern, 0, 1, &lm->lm_pat );
if ( regcomp( &lm->lm_regex, lm->lm_pat.bv_val,
REG_EXTENDED | REG_ICASE ) ) {
free( lm->lm_pat.bv_val );
ch_free( lm );
return( -1 );
}
break;
case SLAP_LIMITS_ANONYMOUS:
case SLAP_LIMITS_USERS:
case SLAP_LIMITS_ANY:
BER_BVZERO( &lm->lm_pat );
break;
}
switch ( type ) {
case SLAP_LIMITS_TYPE_GROUP:
assert( group_oc != NULL );
assert( group_ad != NULL );
lm->lm_group_oc = group_oc;
lm->lm_group_ad = group_ad;
break;
}
lm->lm_flags = style | type;
lm->lm_limits = *limit;
i = 0;
if ( be->be_limits != NULL ) {
for ( ; be->be_limits[i]; i++ );
}
be->be_limits = ( struct slap_limits ** )ch_realloc( be->be_limits,
sizeof( struct slap_limits * ) * ( i + 2 ) );
be->be_limits[i] = lm;
be->be_limits[i+1] = NULL;
return( 0 );
}
#define STRSTART( s, m ) (strncasecmp( s, m, STRLENOF( "" m "" )) == 0)
int
limits_parse(
Backend *be,
const char *fname,
int lineno,
int argc,
char **argv
)
{
int flags = SLAP_LIMITS_UNDEFINED;
char *pattern;
struct slap_limits_set limit;
int i, rc = 0;
ObjectClass *group_oc = NULL;
AttributeDescription *group_ad = NULL;
assert( be != NULL );
if ( argc < 3 ) {
Debug( LDAP_DEBUG_ANY,
"%s : line %d: missing arg(s) in "
"\"limits <pattern> <limits>\" line.\n%s",
fname, lineno, "" );
return( -1 );
}
limit = be->be_def_limit;
/*
* syntax:
*
* "limits" <pattern> <limit> [ ... ]
*
*
* <pattern>:
*
* "anonymous"
* "users"
* [ "dn" [ "." { "this" | "self" } ] [ "." { "exact" | "base" |
* "onelevel" | "subtree" | "children" | "regex" | "anonymous" } ]
* "=" ] <dn pattern>
*
* Note:
* "this" is the baseobject, "self" (the default) is the bound DN
* "exact" and "base" are the same (exact match);
* "onelevel" means exactly one rdn below, NOT including pattern
* "subtree" means any rdn below, including pattern
* "children" means any rdn below, NOT including pattern
*
* "anonymous" may be deprecated in favour
* of the pattern = "anonymous" form
*
* "group[/objectClass[/attributeType]]" "=" "<dn pattern>"
*
* <limit>:
*
* "time" [ "." { "soft" | "hard" } ] "=" <integer>
*
* "size" [ "." { "soft" | "hard" | "unchecked" } ] "=" <integer>
*/
pattern = argv[1];
if ( strcmp( pattern, "*" ) == 0) {
flags = SLAP_LIMITS_ANY;
} else if ( strcasecmp( pattern, "anonymous" ) == 0 ) {
flags = SLAP_LIMITS_ANONYMOUS;
} else if ( strcasecmp( pattern, "users" ) == 0 ) {
flags = SLAP_LIMITS_USERS;
} else if ( STRSTART( pattern, "dn" ) ) {
pattern += STRLENOF( "dn" );
flags = SLAP_LIMITS_TYPE_SELF;
if ( pattern[0] == '.' ) {
pattern++;
if ( STRSTART( pattern, "this" ) ) {
flags = SLAP_LIMITS_TYPE_THIS;
pattern += STRLENOF( "this" );
} else if ( STRSTART( pattern, "self" ) ) {
pattern += STRLENOF( "self" );
} else {
goto got_dn_dot;
}
}
if ( pattern[0] == '.' ) {
pattern++;
got_dn_dot:
if ( STRSTART( pattern, "exact" ) ) {
flags |= SLAP_LIMITS_EXACT;
pattern += STRLENOF( "exact" );
} else if ( STRSTART( pattern, "base" ) ) {
flags |= SLAP_LIMITS_BASE;
pattern += STRLENOF( "base" );
} else if ( STRSTART( pattern, "one" ) ) {
flags |= SLAP_LIMITS_ONE;
pattern += STRLENOF( "one" );
if ( STRSTART( pattern, "level" ) ) {
pattern += STRLENOF( "level" );
} else {
Debug( LDAP_DEBUG_ANY,
"%s : line %d: deprecated \"one\" style "
"\"limits <pattern> <limits>\" line; "
"use \"onelevel\" instead.\n", fname, lineno, 0 );
}
} else if ( STRSTART( pattern, "sub" ) ) {
flags |= SLAP_LIMITS_SUBTREE;
pattern += STRLENOF( "sub" );
if ( STRSTART( pattern, "tree" ) ) {
pattern += STRLENOF( "tree" );
} else {
Debug( LDAP_DEBUG_ANY,
"%s : line %d: deprecated \"sub\" style "
"\"limits <pattern> <limits>\" line; "
"use \"subtree\" instead.\n", fname, lineno, 0 );
}
} else if ( STRSTART( pattern, "children" ) ) {
flags |= SLAP_LIMITS_CHILDREN;
pattern += STRLENOF( "children" );
} else if ( STRSTART( pattern, "regex" ) ) {
flags |= SLAP_LIMITS_REGEX;
pattern += STRLENOF( "regex" );
/*
* this could be deprecated in favour
* of the pattern = "anonymous" form
*/
} else if ( STRSTART( pattern, "anonymous" )
&& flags == SLAP_LIMITS_TYPE_SELF )
{
flags = SLAP_LIMITS_ANONYMOUS;
pattern = NULL;
} else {
/* force error below */
if ( *pattern == '=' )
--pattern;
}
}
/* pre-check the data */
if ( pattern != NULL ) {
if ( pattern[0] != '=' ) {
Debug( LDAP_DEBUG_ANY,
"%s : line %d: %s in "
"\"dn[.{this|self}][.{exact|base"
"|onelevel|subtree|children|regex"
"|anonymous}]=<pattern>\" in "
"\"limits <pattern> <limits>\" line.\n",
fname, lineno,
isalnum( (unsigned char)pattern[0] )
? "unknown DN modifier" : "missing '='" );
return( -1 );
}
/* skip '=' (required) */
pattern++;
/* trim obvious cases */
if ( strcmp( pattern, "*" ) == 0 ) {
flags = SLAP_LIMITS_ANY;
pattern = NULL;
} else if ( (flags & SLAP_LIMITS_MASK) == SLAP_LIMITS_REGEX
&& strcmp( pattern, ".*" ) == 0 ) {
flags = SLAP_LIMITS_ANY;
pattern = NULL;
}
}
} else if (STRSTART( pattern, "group" ) ) {
pattern += STRLENOF( "group" );
if ( pattern[0] == '/' ) {
struct berval oc, ad;
oc.bv_val = pattern + 1;
pattern = strchr( pattern, '=' );
if ( pattern == NULL ) {
return -1;
}
ad.bv_val = strchr( oc.bv_val, '/' );
if ( ad.bv_val != NULL ) {
const char *text = NULL;
oc.bv_len = ad.bv_val - oc.bv_val;
ad.bv_val++;
ad.bv_len = pattern - ad.bv_val;
rc = slap_bv2ad( &ad, &group_ad, &text );
if ( rc != LDAP_SUCCESS ) {
goto no_ad;
}
} else {
oc.bv_len = pattern - oc.bv_val;
}
group_oc = oc_bvfind( &oc );
if ( group_oc == NULL ) {
goto no_oc;
}
}
if ( group_oc == NULL ) {
group_oc = oc_find( SLAPD_GROUP_CLASS );
if ( group_oc == NULL ) {
no_oc:;
return( -1 );
}
}
if ( group_ad == NULL ) {
const char *text = NULL;
rc = slap_str2ad( SLAPD_GROUP_ATTR, &group_ad, &text );
if ( rc != LDAP_SUCCESS ) {
no_ad:;
return( -1 );
}
}
flags = SLAP_LIMITS_TYPE_GROUP | SLAP_LIMITS_EXACT;
if ( pattern[0] != '=' ) {
Debug( LDAP_DEBUG_ANY,
"%s : line %d: missing '=' in "
"\"group[/objectClass[/attributeType]]"
"=<pattern>\" in "
"\"limits <pattern> <limits>\" line.\n",
fname, lineno, 0 );
return( -1 );
}
/* skip '=' (required) */
pattern++;
}
/* get the limits */
for ( i = 2; i < argc; i++ ) {
if ( limits_parse_one( argv[i], &limit ) ) {
Debug( LDAP_DEBUG_ANY,
"%s : line %d: unknown limit values \"%s\" in "
"\"limits <pattern> <limits>\" line.\n",
fname, lineno, argv[i] );
return( 1 );
}
}
/*
* sanity checks ...
*
* FIXME: add warnings?
*/
if ( limit.lms_t_hard > 0 &&
( limit.lms_t_hard < limit.lms_t_soft
|| limit.lms_t_soft == -1 ) ) {
limit.lms_t_hard = limit.lms_t_soft;
}
if ( limit.lms_s_hard > 0 &&
( limit.lms_s_hard < limit.lms_s_soft
|| limit.lms_s_soft == -1 ) ) {
limit.lms_s_hard = limit.lms_s_soft;
}
/*
* defaults ...
*
* lms_t_hard:
* -1 => no limits
* 0 => same as soft
* > 0 => limit (in seconds)
*
* lms_s_hard:
* -1 => no limits
* 0 0> same as soft
* > 0 => limit (in entries)
*
* lms_s_pr_total:
* -2 => disable the control
* -1 => no limits
* 0 => same as soft
* > 0 => limit (in entries)
*
* lms_s_pr:
* -1 => no limits
* 0 => no limits?
* > 0 => limit size (in entries)
*/
if ( limit.lms_s_pr_total > 0 &&
limit.lms_s_pr > limit.lms_s_pr_total ) {
limit.lms_s_pr = limit.lms_s_pr_total;
}
rc = limits_add( be, flags, pattern, group_oc, group_ad, &limit );
if ( rc ) {
Debug( LDAP_DEBUG_ANY,
"%s : line %d: unable to add limit in "
"\"limits <pattern> <limits>\" line.\n",
fname, lineno, 0 );
}
return( rc );
}
int
limits_parse_one(
const char *arg,
struct slap_limits_set *limit
)
{
assert( arg != NULL );
assert( limit != NULL );
if ( STRSTART( arg, "time" ) ) {
arg += STRLENOF( "time" );
if ( arg[0] == '.' ) {
arg++;
if ( STRSTART( arg, "soft=" ) ) {
arg += STRLENOF( "soft=" );
if ( strcasecmp( arg, "unlimited" ) == 0
|| strcasecmp( arg, "none" ) == 0 )
{
limit->lms_t_soft = -1;
} else {
int soft;
if ( lutil_atoi( &soft, arg ) != 0 || soft < -1 ) {
return( 1 );
}
if ( soft == -1 ) {
/* FIXME: use "unlimited" instead; issue warning? */
}
limit->lms_t_soft = soft;
}
} else if ( STRSTART( arg, "hard=" ) ) {
arg += STRLENOF( "hard=" );
if ( strcasecmp( arg, "soft" ) == 0 ) {
limit->lms_t_hard = 0;
} else if ( strcasecmp( arg, "unlimited" ) == 0
|| strcasecmp( arg, "none" ) == 0 )
{
limit->lms_t_hard = -1;
} else {
int hard;
if ( lutil_atoi( &hard, arg ) != 0 || hard < -1 ) {
return( 1 );
}
if ( hard == -1 ) {
/* FIXME: use "unlimited" instead */
}
if ( hard == 0 ) {
/* FIXME: use "soft" instead */
}
limit->lms_t_hard = hard;
}
} else {
return( 1 );
}
} else if ( arg[0] == '=' ) {
arg++;
if ( strcasecmp( arg, "unlimited" ) == 0
|| strcasecmp( arg, "none" ) == 0 )
{
limit->lms_t_soft = -1;
} else {
if ( lutil_atoi( &limit->lms_t_soft, arg ) != 0
|| limit->lms_t_soft < -1 )
{
return( 1 );
}
}
limit->lms_t_hard = 0;
} else {
return( 1 );
}
} else if ( STRSTART( arg, "size" ) ) {
arg += STRLENOF( "size" );
if ( arg[0] == '.' ) {
arg++;
if ( STRSTART( arg, "soft=" ) ) {
arg += STRLENOF( "soft=" );
if ( strcasecmp( arg, "unlimited" ) == 0
|| strcasecmp( arg, "none" ) == 0 )
{
limit->lms_s_soft = -1;
} else {
int soft;
if ( lutil_atoi( &soft, arg ) != 0 || soft < -1 ) {
return( 1 );
}
if ( soft == -1 ) {
/* FIXME: use "unlimited" instead */
}
limit->lms_s_soft = soft;
}
} else if ( STRSTART( arg, "hard=" ) ) {
arg += STRLENOF( "hard=" );
if ( strcasecmp( arg, "soft" ) == 0 ) {
limit->lms_s_hard = 0;
} else if ( strcasecmp( arg, "unlimited" ) == 0
|| strcasecmp( arg, "none" ) == 0 )
{
limit->lms_s_hard = -1;
} else {
int hard;
if ( lutil_atoi( &hard, arg ) != 0 || hard < -1 ) {
return( 1 );
}
if ( hard == -1 ) {
/* FIXME: use "unlimited" instead */
}
if ( hard == 0 ) {
/* FIXME: use "soft" instead */
}
limit->lms_s_hard = hard;
}
} else if ( STRSTART( arg, "unchecked=" ) ) {
arg += STRLENOF( "unchecked=" );
if ( strcasecmp( arg, "unlimited" ) == 0
|| strcasecmp( arg, "none" ) == 0 )
{
limit->lms_s_unchecked = -1;
} else if ( strcasecmp( arg, "disabled" ) == 0 ) {
limit->lms_s_unchecked = 0;
} else {
int unchecked;
if ( lutil_atoi( &unchecked, arg ) != 0 || unchecked < -1 ) {
return( 1 );
}
if ( unchecked == -1 ) {
/* FIXME: use "unlimited" instead */
}
limit->lms_s_unchecked = unchecked;
}
} else if ( STRSTART( arg, "pr=" ) ) {
arg += STRLENOF( "pr=" );
if ( strcasecmp( arg, "noEstimate" ) == 0 ) {
limit->lms_s_pr_hide = 1;
} else if ( strcasecmp( arg, "unlimited" ) == 0
|| strcasecmp( arg, "none" ) == 0 )
{
limit->lms_s_pr = -1;
} else {
int pr;
if ( lutil_atoi( &pr, arg ) != 0 || pr < -1 ) {
return( 1 );
}
if ( pr == -1 ) {
/* FIXME: use "unlimited" instead */
}
limit->lms_s_pr = pr;
}
} else if ( STRSTART( arg, "prtotal=" ) ) {
arg += STRLENOF( "prtotal=" );
if ( strcasecmp( arg, "unlimited" ) == 0
|| strcasecmp( arg, "none" ) == 0 )
{
limit->lms_s_pr_total = -1;
} else if ( strcasecmp( arg, "disabled" ) == 0 ) {
limit->lms_s_pr_total = -2;
} else if ( strcasecmp( arg, "hard" ) == 0 ) {
limit->lms_s_pr_total = 0;
} else {
int total;
if ( lutil_atoi( &total, arg ) != 0 || total < -1 ) {
return( 1 );
}
if ( total == -1 ) {
/* FIXME: use "unlimited" instead */
}
if ( total == 0 ) {
/* FIXME: use "pr=disable" instead */
}
limit->lms_s_pr_total = total;
}
} else {
return( 1 );
}
} else if ( arg[0] == '=' ) {
arg++;
if ( strcasecmp( arg, "unlimited" ) == 0
|| strcasecmp( arg, "none" ) == 0 )
{
limit->lms_s_soft = -1;
} else {
if ( lutil_atoi( &limit->lms_s_soft, arg ) != 0
|| limit->lms_s_soft < -1 )
{
return( 1 );
}
}
limit->lms_s_hard = 0;
} else {
return( 1 );
}
}
return 0;
}
/* Helper macros for limits_unparse() and limits_unparse_one():
* Write to ptr, but not past bufEnd. Move ptr past the new text.
* Return (success && enough room ? 0 : -1).
*/
#define ptr_APPEND_BV(bv) /* Append a \0-terminated berval */ \
(WHATSLEFT <= (bv).bv_len ? -1 : \
((void) (ptr = lutil_strcopy( ptr, (bv).bv_val )), 0))
#define ptr_APPEND_LIT(str) /* Append a string literal */ \
(WHATSLEFT <= STRLENOF( "" str "" ) ? -1 : \
((void) (ptr = lutil_strcopy( ptr, str )), 0))
#define ptr_APPEND_FMT(args) /* Append formatted text */ \
(WHATSLEFT <= (tmpLen = snprintf args) ? -1 : ((void) (ptr += tmpLen), 0))
#define ptr_APPEND_FMT1(fmt, arg) ptr_APPEND_FMT(( ptr, WHATSLEFT, fmt, arg ))
#define WHATSLEFT ((ber_len_t) (bufEnd - ptr))
/* Caller must provide an adequately sized buffer in bv */
int
limits_unparse( struct slap_limits *lim, struct berval *bv, ber_len_t buflen )
{
struct berval btmp;
char *ptr, *bufEnd; /* Updated/used by ptr_APPEND_*()/WHATSLEFT */
ber_len_t tmpLen; /* Used by ptr_APPEND_FMT*() */
unsigned type, style;
int rc = 0;
if ( !bv || !bv->bv_val ) return -1;
ptr = bv->bv_val;
bufEnd = ptr + buflen;
type = lim->lm_flags & SLAP_LIMITS_TYPE_MASK;
if ( type == SLAP_LIMITS_TYPE_GROUP ) {
rc = ptr_APPEND_FMT(( ptr, WHATSLEFT, "group/%s/%s=\"%s\"",
lim->lm_group_oc->soc_cname.bv_val,
lim->lm_group_ad->ad_cname.bv_val,
lim->lm_pat.bv_val ));
} else {
style = lim->lm_flags & SLAP_LIMITS_MASK;
switch( style ) {
case SLAP_LIMITS_ANONYMOUS:
case SLAP_LIMITS_USERS:
case SLAP_LIMITS_ANY:
rc = ptr_APPEND_BV( lmpats[style] );
break;
case SLAP_LIMITS_UNDEFINED:
case SLAP_LIMITS_EXACT:
case SLAP_LIMITS_ONE:
case SLAP_LIMITS_SUBTREE:
case SLAP_LIMITS_CHILDREN:
case SLAP_LIMITS_REGEX:
rc = ptr_APPEND_FMT(( ptr, WHATSLEFT, "dn.%s%s=\"%s\"",
type == SLAP_LIMITS_TYPE_SELF ? "" : "this.",
lmpats[style].bv_val, lim->lm_pat.bv_val ));
break;
}
}
if ( rc == 0 ) {
bv->bv_len = ptr - bv->bv_val;
btmp.bv_val = ptr;
btmp.bv_len = 0;
rc = limits_unparse_one( &lim->lm_limits,
SLAP_LIMIT_SIZE | SLAP_LIMIT_TIME,
&btmp, WHATSLEFT );
if ( rc == 0 )
bv->bv_len += btmp.bv_len;
}
return rc;
}
/* Caller must provide an adequately sized buffer in bv */
int
limits_unparse_one(
struct slap_limits_set *lim,
int which,
struct berval *bv,
ber_len_t buflen )
{
char *ptr, *bufEnd; /* Updated/used by ptr_APPEND_*()/WHATSLEFT */
ber_len_t tmpLen; /* Used by ptr_APPEND_FMT*() */
if ( !bv || !bv->bv_val ) return -1;
ptr = bv->bv_val;
bufEnd = ptr + buflen;
if ( which & SLAP_LIMIT_SIZE ) {
if ( lim->lms_s_soft != SLAPD_DEFAULT_SIZELIMIT ) {
/* If same as global limit, drop it */
if ( lim != &frontendDB->be_def_limit &&
lim->lms_s_soft == frontendDB->be_def_limit.lms_s_soft )
{
goto s_hard;
/* If there's also a hard limit, fully qualify this one */
} else if ( lim->lms_s_hard ) {
if ( ptr_APPEND_LIT( " size.soft=" ) ) return -1;
/* If doing both size & time, qualify this */
} else if ( which & SLAP_LIMIT_TIME ) {
if ( ptr_APPEND_LIT( " size=" ) ) return -1;
}
if ( lim->lms_s_soft == -1
? ptr_APPEND_LIT( "unlimited " )
: ptr_APPEND_FMT1( "%d ", lim->lms_s_soft ) )
return -1;
}
s_hard:
if ( lim->lms_s_hard ) {
if ( ptr_APPEND_LIT( " size.hard=" ) ) return -1;
if ( lim->lms_s_hard == -1
? ptr_APPEND_LIT( "unlimited " )
: ptr_APPEND_FMT1( "%d ", lim->lms_s_hard ) )
return -1;
}
if ( lim->lms_s_unchecked != -1 ) {
if ( ptr_APPEND_LIT( " size.unchecked=" ) ) return -1;
if ( lim->lms_s_unchecked == 0
? ptr_APPEND_LIT( "disabled " )
: ptr_APPEND_FMT1( "%d ", lim->lms_s_unchecked ) )
return -1;
}
if ( lim->lms_s_pr_hide ) {
if ( ptr_APPEND_LIT( " size.pr=noEstimate " ) ) return -1;
}
if ( lim->lms_s_pr ) {
if ( ptr_APPEND_LIT( " size.pr=" ) ) return -1;
if ( lim->lms_s_pr == -1
? ptr_APPEND_LIT( "unlimited " )
: ptr_APPEND_FMT1( "%d ", lim->lms_s_pr ) )
return -1;
}
if ( lim->lms_s_pr_total ) {
if ( ptr_APPEND_LIT( " size.prtotal=" ) ) return -1;
if ( lim->lms_s_pr_total == -1 ? ptr_APPEND_LIT( "unlimited " )
: lim->lms_s_pr_total == -2 ? ptr_APPEND_LIT( "disabled " )
: ptr_APPEND_FMT1( "%d ", lim->lms_s_pr_total ) )
return -1;
}
}
if ( which & SLAP_LIMIT_TIME ) {
if ( lim->lms_t_soft != SLAPD_DEFAULT_TIMELIMIT ) {
/* If same as global limit, drop it */
if ( lim != &frontendDB->be_def_limit &&
lim->lms_t_soft == frontendDB->be_def_limit.lms_t_soft )
{
goto t_hard;
/* If there's also a hard limit, fully qualify this one */
} else if ( lim->lms_t_hard ) {
if ( ptr_APPEND_LIT( " time.soft=" ) ) return -1;
/* If doing both size & time, qualify this */
} else if ( which & SLAP_LIMIT_SIZE ) {
if ( ptr_APPEND_LIT( " time=" ) ) return -1;
}
if ( lim->lms_t_soft == -1
? ptr_APPEND_LIT( "unlimited " )
: ptr_APPEND_FMT1( "%d ", lim->lms_t_soft ) )
return -1;
}
t_hard:
if ( lim->lms_t_hard ) {
if ( ptr_APPEND_LIT( " time.hard=" ) ) return -1;
if ( lim->lms_t_hard == -1
? ptr_APPEND_LIT( "unlimited " )
: ptr_APPEND_FMT1( "%d ", lim->lms_t_hard ) )
return -1;
}
}
if ( ptr != bv->bv_val ) {
ptr--;
*ptr = '\0';
bv->bv_len = ptr - bv->bv_val;
}
return 0;
}
int
limits_check( Operation *op, SlapReply *rs )
{
assert( op != NULL );
assert( rs != NULL );
/* FIXME: should this be always true? */
assert( op->o_tag == LDAP_REQ_SEARCH);
/* protocol only allows 0..maxInt;
*
* internal searches:
* - may use SLAP_NO_LIMIT ( = -1 ) to indicate no limits;
* - should use slimit = N and tlimit = SLAP_NO_LIMIT to
* indicate searches that should return exactly N matches,
* and handle errors thru a callback (see for instance
* slap_sasl_match() and slap_sasl2dn())
*/
if ( op->ors_tlimit == SLAP_NO_LIMIT && op->ors_slimit == SLAP_NO_LIMIT ) {
return 0;
}
/* allow root to set no limit */
if ( be_isroot( op ) ) {
op->ors_limit = NULL;
if ( op->ors_tlimit == 0 ) {
op->ors_tlimit = SLAP_NO_LIMIT;
}
if ( op->ors_slimit == 0 ) {
op->ors_slimit = SLAP_NO_LIMIT;
}
/* if paged results and slimit are requested */
if ( get_pagedresults( op ) > SLAP_CONTROL_IGNORED &&
op->ors_slimit != SLAP_NO_LIMIT ) {
PagedResultsState *ps = op->o_pagedresults_state;
int total = op->ors_slimit - ps->ps_count;
if ( total > 0 ) {
op->ors_slimit = total;
} else {
op->ors_slimit = 0;
}
}
/* if not root, get appropriate limits */
} else {
( void ) limits_get( op, &op->ors_limit );
assert( op->ors_limit != NULL );
/* if no limit is required, use soft limit */
if ( op->ors_tlimit == 0 ) {
op->ors_tlimit = op->ors_limit->lms_t_soft;
/* limit required: check if legal */
} else {
if ( op->ors_limit->lms_t_hard == 0 ) {
if ( op->ors_limit->lms_t_soft > 0
&& ( op->ors_tlimit > op->ors_limit->lms_t_soft ) ) {
op->ors_tlimit = op->ors_limit->lms_t_soft;
}
} else if ( op->ors_limit->lms_t_hard > 0 ) {
#ifdef ABOVE_HARD_LIMIT_IS_ERROR
if ( op->ors_tlimit == SLAP_MAX_LIMIT ) {
op->ors_tlimit = op->ors_limit->lms_t_hard;
} else if ( op->ors_tlimit > op->ors_limit->lms_t_hard ) {
/* error if exceeding hard limit */
rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
send_ldap_result( op, rs );
rs->sr_err = LDAP_SUCCESS;
return -1;
}
#else /* ! ABOVE_HARD_LIMIT_IS_ERROR */
if ( op->ors_tlimit > op->ors_limit->lms_t_hard ) {
op->ors_tlimit = op->ors_limit->lms_t_hard;
}
#endif /* ! ABOVE_HARD_LIMIT_IS_ERROR */
}
}
/* else leave as is */
/* don't even get to backend if candidate check is disabled */
if ( op->ors_limit->lms_s_unchecked == 0 ) {
rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
send_ldap_result( op, rs );
rs->sr_err = LDAP_SUCCESS;
return -1;
}
/* if paged results is requested */
if ( get_pagedresults( op ) > SLAP_CONTROL_IGNORED ) {
int slimit = -2;
int pr_total;
PagedResultsState *ps = op->o_pagedresults_state;
/* paged results is not allowed */
if ( op->ors_limit->lms_s_pr_total == -2 ) {
rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
rs->sr_text = "pagedResults control not allowed";
send_ldap_result( op, rs );
rs->sr_err = LDAP_SUCCESS;
rs->sr_text = NULL;
return -1;
}
if ( op->ors_limit->lms_s_pr > 0
&& ps->ps_size > op->ors_limit->lms_s_pr )
{
rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
rs->sr_text = "illegal pagedResults page size";
send_ldap_result( op, rs );
rs->sr_err = LDAP_SUCCESS;
rs->sr_text = NULL;
return -1;
}
if ( op->ors_limit->lms_s_pr_total == 0 ) {
if ( op->ors_limit->lms_s_hard == 0 ) {
pr_total = op->ors_limit->lms_s_soft;
} else {
pr_total = op->ors_limit->lms_s_hard;
}
} else {
pr_total = op->ors_limit->lms_s_pr_total;
}
if ( pr_total == -1 ) {
if ( op->ors_slimit == 0 || op->ors_slimit == SLAP_MAX_LIMIT ) {
slimit = -1;
} else {
slimit = op->ors_slimit - ps->ps_count;
}
#ifdef ABOVE_HARD_LIMIT_IS_ERROR
} else if ( pr_total > 0 && op->ors_slimit != SLAP_MAX_LIMIT
&& ( op->ors_slimit == SLAP_NO_LIMIT
|| op->ors_slimit > pr_total ) )
{
rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
send_ldap_result( op, rs );
rs->sr_err = LDAP_SUCCESS;
return -1;
#endif /* ! ABOVE_HARD_LIMIT_IS_ERROR */
} else {
/* if no limit is required, use soft limit */
int total;
int slimit2;
/* first round of pagedResults:
* set count to any appropriate limit */
/* if the limit is set, check that it does
* not violate any server-side limit */
#ifdef ABOVE_HARD_LIMIT_IS_ERROR
if ( op->ors_slimit == SLAP_MAX_LIMIT )
#else /* ! ABOVE_HARD_LIMIT_IS_ERROR */
if ( op->ors_slimit == SLAP_MAX_LIMIT
|| op->ors_slimit > pr_total )
#endif /* ! ABOVE_HARD_LIMIT_IS_ERROR */
{
slimit2 = op->ors_slimit = pr_total;
} else if ( op->ors_slimit == 0 ) {
slimit2 = pr_total;
} else {
slimit2 = op->ors_slimit;
}
total = slimit2 - ps->ps_count;
if ( total >= 0 ) {
if ( op->ors_limit->lms_s_pr > 0 ) {
/* use the smallest limit set by total/per page */
if ( total < op->ors_limit->lms_s_pr ) {
slimit = total;
} else {
/* use the perpage limit if any
* NOTE: + 1 because given value must be legal */
slimit = op->ors_limit->lms_s_pr + 1;
}
} else {
/* use the total limit if any */
slimit = total;
}
} else if ( op->ors_limit->lms_s_pr > 0 ) {
/* use the perpage limit if any
* NOTE: + 1 because the given value must be legal */
slimit = op->ors_limit->lms_s_pr + 1;
} else {
/* use the standard hard/soft limit if any */
slimit = op->ors_limit->lms_s_hard;
}
}
/* if got any limit, use it */
if ( slimit != -2 ) {
if ( op->ors_slimit == 0 ) {
op->ors_slimit = slimit;
} else if ( slimit > 0 ) {
if ( op->ors_slimit - ps->ps_count > slimit ) {
rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
send_ldap_result( op, rs );
rs->sr_err = LDAP_SUCCESS;
return -1;
}
op->ors_slimit = slimit;
} else if ( slimit == 0 ) {
op->ors_slimit = 0;
}
} else {
/* use the standard hard/soft limit if any */
op->ors_slimit = pr_total;
}
/* no limit requested: use soft, whatever it is */
} else if ( op->ors_slimit == 0 ) {
op->ors_slimit = op->ors_limit->lms_s_soft;
/* limit requested: check if legal */
} else {
/* hard limit as soft (traditional behavior) */
if ( op->ors_limit->lms_s_hard == 0 ) {
if ( op->ors_limit->lms_s_soft > 0
&& op->ors_slimit > op->ors_limit->lms_s_soft ) {
op->ors_slimit = op->ors_limit->lms_s_soft;
}
/* explicit hard limit: error if violated */
} else if ( op->ors_limit->lms_s_hard > 0 ) {
#ifdef ABOVE_HARD_LIMIT_IS_ERROR
if ( op->ors_slimit == SLAP_MAX_LIMIT ) {
op->ors_slimit = op->ors_limit->lms_s_hard;
} else if ( op->ors_slimit > op->ors_limit->lms_s_hard ) {
/* if limit exceeds hard, error */
rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
send_ldap_result( op, rs );
rs->sr_err = LDAP_SUCCESS;
return -1;
}
#else /* ! ABOVE_HARD_LIMIT_IS_ERROR */
if ( op->ors_slimit > op->ors_limit->lms_s_hard ) {
op->ors_slimit = op->ors_limit->lms_s_hard;
}
#endif /* ! ABOVE_HARD_LIMIT_IS_ERROR */
}
}
/* else leave as is */
}
return 0;
}
void
limits_free_one(
struct slap_limits *lm )
{
if ( ( lm->lm_flags & SLAP_LIMITS_MASK ) == SLAP_LIMITS_REGEX )
regfree( &lm->lm_regex );
if ( !BER_BVISNULL( &lm->lm_pat ) )
ch_free( lm->lm_pat.bv_val );
ch_free( lm );
}
void
limits_destroy(
struct slap_limits **lm )
{
int i;
if ( lm == NULL ) {
return;
}
for ( i = 0; lm[ i ]; i++ ) {
limits_free_one( lm[ i ] );
}
ch_free( lm );
}
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