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-rw-r--r--servers/slapd/limits.c1355
1 files changed, 1355 insertions, 0 deletions
diff --git a/servers/slapd/limits.c b/servers/slapd/limits.c
new file mode 100644
index 0000000..5812517
--- /dev/null
+++ b/servers/slapd/limits.c
@@ -0,0 +1,1355 @@
+/* limits.c - routines to handle regex-based size and time limits */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 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 );
+}